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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * FiberChannel transport specific attributes exported to sysfs.
4 *
5 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
6 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
7 * Rewrite for host, target, device, and remote port attributes,
8 * statistics, and service functions...
9 * Add vports, etc
10 */
11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/slab.h>
14#include <linux/delay.h>
15#include <linux/kernel.h>
16#include <linux/bsg-lib.h>
17#include <scsi/scsi_device.h>
18#include <scsi/scsi_host.h>
19#include <scsi/scsi_transport.h>
20#include <scsi/scsi_transport_fc.h>
21#include <scsi/scsi_cmnd.h>
22#include <net/netlink.h>
23#include <scsi/scsi_netlink_fc.h>
24#include <scsi/scsi_bsg_fc.h>
25#include <uapi/scsi/fc/fc_els.h>
26#include "scsi_priv.h"
27
28static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
29static void fc_vport_sched_delete(struct work_struct *work);
30static int fc_vport_setup(struct Scsi_Host *shost, int channel,
31 struct device *pdev, struct fc_vport_identifiers *ids,
32 struct fc_vport **vport);
33static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
34static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
35static void fc_bsg_remove(struct request_queue *);
36static void fc_bsg_goose_queue(struct fc_rport *);
37static void fc_li_stats_update(u16 event_type,
38 struct fc_fpin_stats *stats);
39static void fc_delivery_stats_update(u32 reason_code,
40 struct fc_fpin_stats *stats);
41static void fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats);
42
43/*
44 * Module Parameters
45 */
46
47/*
48 * dev_loss_tmo: the default number of seconds that the FC transport
49 * should insulate the loss of a remote port.
50 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
51 */
52static unsigned int fc_dev_loss_tmo = 60; /* seconds */
53
54module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
55MODULE_PARM_DESC(dev_loss_tmo,
56 "Maximum number of seconds that the FC transport should"
57 " insulate the loss of a remote port. Once this value is"
58 " exceeded, the scsi target is removed. Value should be"
59 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
60 " fast_io_fail_tmo is not set.");
61
62/*
63 * Redefine so that we can have same named attributes in the
64 * sdev/starget/host objects.
65 */
66#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
67struct device_attribute device_attr_##_prefix##_##_name = \
68 __ATTR(_name,_mode,_show,_store)
69
70#define fc_enum_name_search(title, table_type, table) \
71static const char *get_fc_##title##_name(enum table_type table_key) \
72{ \
73 int i; \
74 char *name = NULL; \
75 \
76 for (i = 0; i < ARRAY_SIZE(table); i++) { \
77 if (table[i].value == table_key) { \
78 name = table[i].name; \
79 break; \
80 } \
81 } \
82 return name; \
83}
84
85#define fc_enum_name_match(title, table_type, table) \
86static int get_fc_##title##_match(const char *table_key, \
87 enum table_type *value) \
88{ \
89 int i; \
90 \
91 for (i = 0; i < ARRAY_SIZE(table); i++) { \
92 if (strncmp(table_key, table[i].name, \
93 table[i].matchlen) == 0) { \
94 *value = table[i].value; \
95 return 0; /* success */ \
96 } \
97 } \
98 return 1; /* failure */ \
99}
100
101
102/* Convert fc_port_type values to ascii string name */
103static struct {
104 enum fc_port_type value;
105 char *name;
106} fc_port_type_names[] = {
107 { FC_PORTTYPE_UNKNOWN, "Unknown" },
108 { FC_PORTTYPE_OTHER, "Other" },
109 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
110 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
111 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
112 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
113 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
114 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
115};
116fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
117#define FC_PORTTYPE_MAX_NAMELEN 50
118
119/* Reuse fc_port_type enum function for vport_type */
120#define get_fc_vport_type_name get_fc_port_type_name
121
122
123/* Convert fc_host_event_code values to ascii string name */
124static const struct {
125 enum fc_host_event_code value;
126 char *name;
127} fc_host_event_code_names[] = {
128 { FCH_EVT_LIP, "lip" },
129 { FCH_EVT_LINKUP, "link_up" },
130 { FCH_EVT_LINKDOWN, "link_down" },
131 { FCH_EVT_LIPRESET, "lip_reset" },
132 { FCH_EVT_RSCN, "rscn" },
133 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
134 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
135 { FCH_EVT_PORT_ONLINE, "port_online" },
136 { FCH_EVT_PORT_OFFLINE, "port_offline" },
137 { FCH_EVT_PORT_FABRIC, "port_fabric" },
138 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
139 { FCH_EVT_LINK_FPIN, "link_FPIN" },
140 { FCH_EVT_LINK_FPIN_ACK, "link_FPIN_ACK" },
141 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
142};
143fc_enum_name_search(host_event_code, fc_host_event_code,
144 fc_host_event_code_names)
145#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
146
147
148/* Convert fc_port_state values to ascii string name */
149static struct {
150 enum fc_port_state value;
151 char *name;
152 int matchlen;
153} fc_port_state_names[] = {
154 { FC_PORTSTATE_UNKNOWN, "Unknown", 7},
155 { FC_PORTSTATE_NOTPRESENT, "Not Present", 11 },
156 { FC_PORTSTATE_ONLINE, "Online", 6 },
157 { FC_PORTSTATE_OFFLINE, "Offline", 7 },
158 { FC_PORTSTATE_BLOCKED, "Blocked", 7 },
159 { FC_PORTSTATE_BYPASSED, "Bypassed", 8 },
160 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics", 11 },
161 { FC_PORTSTATE_LINKDOWN, "Linkdown", 8 },
162 { FC_PORTSTATE_ERROR, "Error", 5 },
163 { FC_PORTSTATE_LOOPBACK, "Loopback", 8 },
164 { FC_PORTSTATE_DELETED, "Deleted", 7 },
165 { FC_PORTSTATE_MARGINAL, "Marginal", 8 },
166};
167fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
168fc_enum_name_match(port_state, fc_port_state, fc_port_state_names)
169#define FC_PORTSTATE_MAX_NAMELEN 20
170
171
172/* Convert fc_vport_state values to ascii string name */
173static struct {
174 enum fc_vport_state value;
175 char *name;
176} fc_vport_state_names[] = {
177 { FC_VPORT_UNKNOWN, "Unknown" },
178 { FC_VPORT_ACTIVE, "Active" },
179 { FC_VPORT_DISABLED, "Disabled" },
180 { FC_VPORT_LINKDOWN, "Linkdown" },
181 { FC_VPORT_INITIALIZING, "Initializing" },
182 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
183 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
184 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
185 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
186 { FC_VPORT_FAILED, "VPort Failed" },
187};
188fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
189#define FC_VPORTSTATE_MAX_NAMELEN 24
190
191/* Reuse fc_vport_state enum function for vport_last_state */
192#define get_fc_vport_last_state_name get_fc_vport_state_name
193
194
195/* Convert fc_tgtid_binding_type values to ascii string name */
196static const struct {
197 enum fc_tgtid_binding_type value;
198 char *name;
199 int matchlen;
200} fc_tgtid_binding_type_names[] = {
201 { FC_TGTID_BIND_NONE, "none", 4 },
202 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
203 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
204 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
205};
206fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
207 fc_tgtid_binding_type_names)
208fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
209 fc_tgtid_binding_type_names)
210#define FC_BINDTYPE_MAX_NAMELEN 30
211
212
213#define fc_bitfield_name_search(title, table) \
214static ssize_t \
215get_fc_##title##_names(u32 table_key, char *buf) \
216{ \
217 char *prefix = ""; \
218 ssize_t len = 0; \
219 int i; \
220 \
221 for (i = 0; i < ARRAY_SIZE(table); i++) { \
222 if (table[i].value & table_key) { \
223 len += sprintf(buf + len, "%s%s", \
224 prefix, table[i].name); \
225 prefix = ", "; \
226 } \
227 } \
228 len += sprintf(buf + len, "\n"); \
229 return len; \
230}
231
232
233/* Convert FC_COS bit values to ascii string name */
234static const struct {
235 u32 value;
236 char *name;
237} fc_cos_names[] = {
238 { FC_COS_CLASS1, "Class 1" },
239 { FC_COS_CLASS2, "Class 2" },
240 { FC_COS_CLASS3, "Class 3" },
241 { FC_COS_CLASS4, "Class 4" },
242 { FC_COS_CLASS6, "Class 6" },
243};
244fc_bitfield_name_search(cos, fc_cos_names)
245
246
247/* Convert FC_PORTSPEED bit values to ascii string name */
248static const struct {
249 u32 value;
250 char *name;
251} fc_port_speed_names[] = {
252 { FC_PORTSPEED_1GBIT, "1 Gbit" },
253 { FC_PORTSPEED_2GBIT, "2 Gbit" },
254 { FC_PORTSPEED_4GBIT, "4 Gbit" },
255 { FC_PORTSPEED_10GBIT, "10 Gbit" },
256 { FC_PORTSPEED_8GBIT, "8 Gbit" },
257 { FC_PORTSPEED_16GBIT, "16 Gbit" },
258 { FC_PORTSPEED_32GBIT, "32 Gbit" },
259 { FC_PORTSPEED_20GBIT, "20 Gbit" },
260 { FC_PORTSPEED_40GBIT, "40 Gbit" },
261 { FC_PORTSPEED_50GBIT, "50 Gbit" },
262 { FC_PORTSPEED_100GBIT, "100 Gbit" },
263 { FC_PORTSPEED_25GBIT, "25 Gbit" },
264 { FC_PORTSPEED_64GBIT, "64 Gbit" },
265 { FC_PORTSPEED_128GBIT, "128 Gbit" },
266 { FC_PORTSPEED_256GBIT, "256 Gbit" },
267 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
268};
269fc_bitfield_name_search(port_speed, fc_port_speed_names)
270
271
272static int
273show_fc_fc4s (char *buf, u8 *fc4_list)
274{
275 int i, len=0;
276
277 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
278 len += sprintf(buf + len , "0x%02x ", *fc4_list);
279 len += sprintf(buf + len, "\n");
280 return len;
281}
282
283
284/* Convert FC_PORT_ROLE bit values to ascii string name */
285static const struct {
286 u32 value;
287 char *name;
288} fc_port_role_names[] = {
289 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
290 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
291 { FC_PORT_ROLE_IP_PORT, "IP Port" },
292 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" },
293 { FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" },
294 { FC_PORT_ROLE_NVME_TARGET, "NVMe Target" },
295 { FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" },
296};
297fc_bitfield_name_search(port_roles, fc_port_role_names)
298
299/*
300 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
301 */
302#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
303#define FC_WELLKNOWN_ROLE_MASK 0x00000f
304#define FC_FPORT_PORTID 0x00000e
305#define FC_FABCTLR_PORTID 0x00000d
306#define FC_DIRSRVR_PORTID 0x00000c
307#define FC_TIMESRVR_PORTID 0x00000b
308#define FC_MGMTSRVR_PORTID 0x00000a
309
310
311static void fc_timeout_deleted_rport(struct work_struct *work);
312static void fc_timeout_fail_rport_io(struct work_struct *work);
313static void fc_scsi_scan_rport(struct work_struct *work);
314
315/*
316 * Attribute counts pre object type...
317 * Increase these values if you add attributes
318 */
319#define FC_STARGET_NUM_ATTRS 3
320#define FC_RPORT_NUM_ATTRS 10
321#define FC_VPORT_NUM_ATTRS 9
322#define FC_HOST_NUM_ATTRS 29
323
324struct fc_internal {
325 struct scsi_transport_template t;
326 struct fc_function_template *f;
327
328 /*
329 * For attributes : each object has :
330 * An array of the actual attributes structures
331 * An array of null-terminated pointers to the attribute
332 * structures - used for mid-layer interaction.
333 *
334 * The attribute containers for the starget and host are are
335 * part of the midlayer. As the remote port is specific to the
336 * fc transport, we must provide the attribute container.
337 */
338 struct device_attribute private_starget_attrs[
339 FC_STARGET_NUM_ATTRS];
340 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
341
342 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
343 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
344
345 struct transport_container rport_attr_cont;
346 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
347 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
348
349 struct transport_container vport_attr_cont;
350 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
351 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
352};
353
354#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
355
356static int fc_target_setup(struct transport_container *tc, struct device *dev,
357 struct device *cdev)
358{
359 struct scsi_target *starget = to_scsi_target(dev);
360 struct fc_rport *rport = starget_to_rport(starget);
361
362 /*
363 * if parent is remote port, use values from remote port.
364 * Otherwise, this host uses the fc_transport, but not the
365 * remote port interface. As such, initialize to known non-values.
366 */
367 if (rport) {
368 fc_starget_node_name(starget) = rport->node_name;
369 fc_starget_port_name(starget) = rport->port_name;
370 fc_starget_port_id(starget) = rport->port_id;
371 } else {
372 fc_starget_node_name(starget) = -1;
373 fc_starget_port_name(starget) = -1;
374 fc_starget_port_id(starget) = -1;
375 }
376
377 return 0;
378}
379
380static DECLARE_TRANSPORT_CLASS(fc_transport_class,
381 "fc_transport",
382 fc_target_setup,
383 NULL,
384 NULL);
385
386static int fc_host_setup(struct transport_container *tc, struct device *dev,
387 struct device *cdev)
388{
389 struct Scsi_Host *shost = dev_to_shost(dev);
390 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
391
392 /*
393 * Set default values easily detected by the midlayer as
394 * failure cases. The scsi lldd is responsible for initializing
395 * all transport attributes to valid values per host.
396 */
397 fc_host->node_name = -1;
398 fc_host->port_name = -1;
399 fc_host->permanent_port_name = -1;
400 fc_host->supported_classes = FC_COS_UNSPECIFIED;
401 memset(fc_host->supported_fc4s, 0,
402 sizeof(fc_host->supported_fc4s));
403 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
404 fc_host->maxframe_size = -1;
405 fc_host->max_npiv_vports = 0;
406 memset(fc_host->serial_number, 0,
407 sizeof(fc_host->serial_number));
408 memset(fc_host->manufacturer, 0,
409 sizeof(fc_host->manufacturer));
410 memset(fc_host->model, 0,
411 sizeof(fc_host->model));
412 memset(fc_host->model_description, 0,
413 sizeof(fc_host->model_description));
414 memset(fc_host->hardware_version, 0,
415 sizeof(fc_host->hardware_version));
416 memset(fc_host->driver_version, 0,
417 sizeof(fc_host->driver_version));
418 memset(fc_host->firmware_version, 0,
419 sizeof(fc_host->firmware_version));
420 memset(fc_host->optionrom_version, 0,
421 sizeof(fc_host->optionrom_version));
422
423 fc_host->port_id = -1;
424 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
425 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
426 memset(fc_host->active_fc4s, 0,
427 sizeof(fc_host->active_fc4s));
428 fc_host->speed = FC_PORTSPEED_UNKNOWN;
429 fc_host->fabric_name = -1;
430 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
431 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
432 memset(&fc_host->fpin_stats, 0, sizeof(fc_host->fpin_stats));
433
434 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
435
436 INIT_LIST_HEAD(&fc_host->rports);
437 INIT_LIST_HEAD(&fc_host->rport_bindings);
438 INIT_LIST_HEAD(&fc_host->vports);
439 fc_host->next_rport_number = 0;
440 fc_host->next_target_id = 0;
441 fc_host->next_vport_number = 0;
442 fc_host->npiv_vports_inuse = 0;
443
444 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
445 "fc_wq_%d", shost->host_no);
446 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
447 if (!fc_host->work_q)
448 return -ENOMEM;
449
450 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
451 snprintf(fc_host->devloss_work_q_name,
452 sizeof(fc_host->devloss_work_q_name),
453 "fc_dl_%d", shost->host_no);
454 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
455 fc_host->devloss_work_q_name);
456 if (!fc_host->devloss_work_q) {
457 destroy_workqueue(fc_host->work_q);
458 fc_host->work_q = NULL;
459 return -ENOMEM;
460 }
461
462 fc_bsg_hostadd(shost, fc_host);
463 /* ignore any bsg add error - we just can't do sgio */
464
465 return 0;
466}
467
468static int fc_host_remove(struct transport_container *tc, struct device *dev,
469 struct device *cdev)
470{
471 struct Scsi_Host *shost = dev_to_shost(dev);
472 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
473
474 fc_bsg_remove(fc_host->rqst_q);
475 return 0;
476}
477
478static DECLARE_TRANSPORT_CLASS(fc_host_class,
479 "fc_host",
480 fc_host_setup,
481 fc_host_remove,
482 NULL);
483
484/*
485 * Setup and Remove actions for remote ports are handled
486 * in the service functions below.
487 */
488static DECLARE_TRANSPORT_CLASS(fc_rport_class,
489 "fc_remote_ports",
490 NULL,
491 NULL,
492 NULL);
493
494/*
495 * Setup and Remove actions for virtual ports are handled
496 * in the service functions below.
497 */
498static DECLARE_TRANSPORT_CLASS(fc_vport_class,
499 "fc_vports",
500 NULL,
501 NULL,
502 NULL);
503
504/*
505 * Netlink Infrastructure
506 */
507
508static atomic_t fc_event_seq;
509
510/**
511 * fc_get_event_number - Obtain the next sequential FC event number
512 *
513 * Notes:
514 * We could have inlined this, but it would have required fc_event_seq to
515 * be exposed. For now, live with the subroutine call.
516 * Atomic used to avoid lock/unlock...
517 */
518u32
519fc_get_event_number(void)
520{
521 return atomic_add_return(1, &fc_event_seq);
522}
523EXPORT_SYMBOL(fc_get_event_number);
524
525/**
526 * fc_host_post_fc_event - routine to do the work of posting an event
527 * on an fc_host.
528 * @shost: host the event occurred on
529 * @event_number: fc event number obtained from get_fc_event_number()
530 * @event_code: fc_host event being posted
531 * @data_len: amount, in bytes, of event data
532 * @data_buf: pointer to event data
533 * @vendor_id: value for Vendor id
534 *
535 * Notes:
536 * This routine assumes no locks are held on entry.
537 */
538void
539fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
540 enum fc_host_event_code event_code,
541 u32 data_len, char *data_buf, u64 vendor_id)
542{
543 struct sk_buff *skb;
544 struct nlmsghdr *nlh;
545 struct fc_nl_event *event;
546 const char *name;
547 size_t len, padding;
548 int err;
549
550 if (!data_buf || data_len < 4)
551 data_len = 0;
552
553 if (!scsi_nl_sock) {
554 err = -ENOENT;
555 goto send_fail;
556 }
557
558 len = FC_NL_MSGALIGN(sizeof(*event) - sizeof(event->event_data) + data_len);
559
560 skb = nlmsg_new(len, GFP_KERNEL);
561 if (!skb) {
562 err = -ENOBUFS;
563 goto send_fail;
564 }
565
566 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
567 if (!nlh) {
568 err = -ENOBUFS;
569 goto send_fail_skb;
570 }
571 event = nlmsg_data(nlh);
572
573 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
574 FC_NL_ASYNC_EVENT, len);
575 event->seconds = ktime_get_real_seconds();
576 event->vendor_id = vendor_id;
577 event->host_no = shost->host_no;
578 event->event_datalen = data_len; /* bytes */
579 event->event_num = event_number;
580 event->event_code = event_code;
581 if (data_len)
582 memcpy(event->event_data_flex, data_buf, data_len);
583 padding = len - offsetof(typeof(*event), event_data_flex) - data_len;
584 memset(event->event_data_flex + data_len, 0, padding);
585
586 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
587 GFP_KERNEL);
588 return;
589
590send_fail_skb:
591 kfree_skb(skb);
592send_fail:
593 name = get_fc_host_event_code_name(event_code);
594 printk(KERN_WARNING
595 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
596 __func__, shost->host_no,
597 (name) ? name : "<unknown>",
598 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err);
599 return;
600}
601EXPORT_SYMBOL(fc_host_post_fc_event);
602
603/**
604 * fc_host_post_event - called to post an even on an fc_host.
605 * @shost: host the event occurred on
606 * @event_number: fc event number obtained from get_fc_event_number()
607 * @event_code: fc_host event being posted
608 * @event_data: 32bits of data for the event being posted
609 *
610 * Notes:
611 * This routine assumes no locks are held on entry.
612 */
613void
614fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
615 enum fc_host_event_code event_code, u32 event_data)
616{
617 fc_host_post_fc_event(shost, event_number, event_code,
618 (u32)sizeof(u32), (char *)&event_data, 0);
619}
620EXPORT_SYMBOL(fc_host_post_event);
621
622
623/**
624 * fc_host_post_vendor_event - called to post a vendor unique event
625 * on an fc_host
626 * @shost: host the event occurred on
627 * @event_number: fc event number obtained from get_fc_event_number()
628 * @data_len: amount, in bytes, of vendor unique data
629 * @data_buf: pointer to vendor unique data
630 * @vendor_id: Vendor id
631 *
632 * Notes:
633 * This routine assumes no locks are held on entry.
634 */
635void
636fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
637 u32 data_len, char * data_buf, u64 vendor_id)
638{
639 fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE,
640 data_len, data_buf, vendor_id);
641}
642EXPORT_SYMBOL(fc_host_post_vendor_event);
643
644/**
645 * fc_find_rport_by_wwpn - find the fc_rport pointer for a given wwpn
646 * @shost: host the fc_rport is associated with
647 * @wwpn: wwpn of the fc_rport device
648 *
649 * Notes:
650 * This routine assumes no locks are held on entry.
651 */
652struct fc_rport *
653fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn)
654{
655 struct fc_rport *rport;
656 unsigned long flags;
657
658 spin_lock_irqsave(shost->host_lock, flags);
659
660 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
661 if (rport->port_state != FC_PORTSTATE_ONLINE)
662 continue;
663
664 if (rport->port_name == wwpn) {
665 spin_unlock_irqrestore(shost->host_lock, flags);
666 return rport;
667 }
668 }
669
670 spin_unlock_irqrestore(shost->host_lock, flags);
671 return NULL;
672}
673EXPORT_SYMBOL(fc_find_rport_by_wwpn);
674
675static void
676fc_li_stats_update(u16 event_type,
677 struct fc_fpin_stats *stats)
678{
679 stats->li++;
680 switch (event_type) {
681 case FPIN_LI_UNKNOWN:
682 stats->li_failure_unknown++;
683 break;
684 case FPIN_LI_LINK_FAILURE:
685 stats->li_link_failure_count++;
686 break;
687 case FPIN_LI_LOSS_OF_SYNC:
688 stats->li_loss_of_sync_count++;
689 break;
690 case FPIN_LI_LOSS_OF_SIG:
691 stats->li_loss_of_signals_count++;
692 break;
693 case FPIN_LI_PRIM_SEQ_ERR:
694 stats->li_prim_seq_err_count++;
695 break;
696 case FPIN_LI_INVALID_TX_WD:
697 stats->li_invalid_tx_word_count++;
698 break;
699 case FPIN_LI_INVALID_CRC:
700 stats->li_invalid_crc_count++;
701 break;
702 case FPIN_LI_DEVICE_SPEC:
703 stats->li_device_specific++;
704 break;
705 }
706}
707
708static void
709fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats)
710{
711 stats->dn++;
712 switch (reason_code) {
713 case FPIN_DELI_UNKNOWN:
714 stats->dn_unknown++;
715 break;
716 case FPIN_DELI_TIMEOUT:
717 stats->dn_timeout++;
718 break;
719 case FPIN_DELI_UNABLE_TO_ROUTE:
720 stats->dn_unable_to_route++;
721 break;
722 case FPIN_DELI_DEVICE_SPEC:
723 stats->dn_device_specific++;
724 break;
725 }
726}
727
728static void
729fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats)
730{
731 stats->cn++;
732 switch (event_type) {
733 case FPIN_CONGN_CLEAR:
734 stats->cn_clear++;
735 break;
736 case FPIN_CONGN_LOST_CREDIT:
737 stats->cn_lost_credit++;
738 break;
739 case FPIN_CONGN_CREDIT_STALL:
740 stats->cn_credit_stall++;
741 break;
742 case FPIN_CONGN_OVERSUBSCRIPTION:
743 stats->cn_oversubscription++;
744 break;
745 case FPIN_CONGN_DEVICE_SPEC:
746 stats->cn_device_specific++;
747 }
748}
749
750/*
751 * fc_fpin_li_stats_update - routine to update Link Integrity
752 * event statistics.
753 * @shost: host the FPIN was received on
754 * @tlv: pointer to link integrity descriptor
755 *
756 */
757static void
758fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv)
759{
760 u8 i;
761 struct fc_rport *rport = NULL;
762 struct fc_rport *attach_rport = NULL;
763 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
764 struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv;
765 u16 event_type = be16_to_cpu(li_desc->event_type);
766 u64 wwpn;
767
768 rport = fc_find_rport_by_wwpn(shost,
769 be64_to_cpu(li_desc->attached_wwpn));
770 if (rport &&
771 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
772 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
773 attach_rport = rport;
774 fc_li_stats_update(event_type, &attach_rport->fpin_stats);
775 }
776
777 if (be32_to_cpu(li_desc->pname_count) > 0) {
778 for (i = 0;
779 i < be32_to_cpu(li_desc->pname_count);
780 i++) {
781 wwpn = be64_to_cpu(li_desc->pname_list[i]);
782 rport = fc_find_rport_by_wwpn(shost, wwpn);
783 if (rport &&
784 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
785 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
786 if (rport == attach_rport)
787 continue;
788 fc_li_stats_update(event_type,
789 &rport->fpin_stats);
790 }
791 }
792 }
793
794 if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn))
795 fc_li_stats_update(event_type, &fc_host->fpin_stats);
796}
797
798/*
799 * fc_fpin_delivery_stats_update - routine to update Delivery Notification
800 * event statistics.
801 * @shost: host the FPIN was received on
802 * @tlv: pointer to delivery descriptor
803 *
804 */
805static void
806fc_fpin_delivery_stats_update(struct Scsi_Host *shost,
807 struct fc_tlv_desc *tlv)
808{
809 struct fc_rport *rport = NULL;
810 struct fc_rport *attach_rport = NULL;
811 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
812 struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv;
813 u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code);
814
815 rport = fc_find_rport_by_wwpn(shost,
816 be64_to_cpu(dn_desc->attached_wwpn));
817 if (rport &&
818 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
819 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
820 attach_rport = rport;
821 fc_delivery_stats_update(reason_code,
822 &attach_rport->fpin_stats);
823 }
824
825 if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn))
826 fc_delivery_stats_update(reason_code, &fc_host->fpin_stats);
827}
828
829/*
830 * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion
831 * event statistics.
832 * @shost: host the FPIN was received on
833 * @tlv: pointer to peer congestion descriptor
834 *
835 */
836static void
837fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost,
838 struct fc_tlv_desc *tlv)
839{
840 u8 i;
841 struct fc_rport *rport = NULL;
842 struct fc_rport *attach_rport = NULL;
843 struct fc_fn_peer_congn_desc *pc_desc =
844 (struct fc_fn_peer_congn_desc *)tlv;
845 u16 event_type = be16_to_cpu(pc_desc->event_type);
846 u64 wwpn;
847
848 rport = fc_find_rport_by_wwpn(shost,
849 be64_to_cpu(pc_desc->attached_wwpn));
850 if (rport &&
851 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
852 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
853 attach_rport = rport;
854 fc_cn_stats_update(event_type, &attach_rport->fpin_stats);
855 }
856
857 if (be32_to_cpu(pc_desc->pname_count) > 0) {
858 for (i = 0;
859 i < be32_to_cpu(pc_desc->pname_count);
860 i++) {
861 wwpn = be64_to_cpu(pc_desc->pname_list[i]);
862 rport = fc_find_rport_by_wwpn(shost, wwpn);
863 if (rport &&
864 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
865 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
866 if (rport == attach_rport)
867 continue;
868 fc_cn_stats_update(event_type,
869 &rport->fpin_stats);
870 }
871 }
872 }
873}
874
875/*
876 * fc_fpin_congn_stats_update - routine to update Congestion
877 * event statistics.
878 * @shost: host the FPIN was received on
879 * @tlv: pointer to congestion descriptor
880 *
881 */
882static void
883fc_fpin_congn_stats_update(struct Scsi_Host *shost,
884 struct fc_tlv_desc *tlv)
885{
886 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
887 struct fc_fn_congn_desc *congn = (struct fc_fn_congn_desc *)tlv;
888
889 fc_cn_stats_update(be16_to_cpu(congn->event_type),
890 &fc_host->fpin_stats);
891}
892
893/**
894 * fc_host_fpin_rcv - routine to process a received FPIN.
895 * @shost: host the FPIN was received on
896 * @fpin_len: length of FPIN payload, in bytes
897 * @fpin_buf: pointer to FPIN payload
898 * @event_acknowledge: 1, if LLDD handles this event.
899 * Notes:
900 * This routine assumes no locks are held on entry.
901 */
902void
903fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf,
904 u8 event_acknowledge)
905{
906 struct fc_els_fpin *fpin = (struct fc_els_fpin *)fpin_buf;
907 struct fc_tlv_desc *tlv;
908 u32 bytes_remain;
909 u32 dtag;
910 enum fc_host_event_code event_code =
911 event_acknowledge ? FCH_EVT_LINK_FPIN_ACK : FCH_EVT_LINK_FPIN;
912
913 /* Update Statistics */
914 tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
915 bytes_remain = fpin_len - offsetof(struct fc_els_fpin, fpin_desc);
916 bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
917
918 while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
919 bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
920 dtag = be32_to_cpu(tlv->desc_tag);
921 switch (dtag) {
922 case ELS_DTAG_LNK_INTEGRITY:
923 fc_fpin_li_stats_update(shost, tlv);
924 break;
925 case ELS_DTAG_DELIVERY:
926 fc_fpin_delivery_stats_update(shost, tlv);
927 break;
928 case ELS_DTAG_PEER_CONGEST:
929 fc_fpin_peer_congn_stats_update(shost, tlv);
930 break;
931 case ELS_DTAG_CONGESTION:
932 fc_fpin_congn_stats_update(shost, tlv);
933 }
934
935 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
936 tlv = fc_tlv_next_desc(tlv);
937 }
938
939 fc_host_post_fc_event(shost, fc_get_event_number(),
940 event_code, fpin_len, fpin_buf, 0);
941}
942EXPORT_SYMBOL(fc_host_fpin_rcv);
943
944
945static __init int fc_transport_init(void)
946{
947 int error;
948
949 atomic_set(&fc_event_seq, 0);
950
951 error = transport_class_register(&fc_host_class);
952 if (error)
953 return error;
954 error = transport_class_register(&fc_vport_class);
955 if (error)
956 goto unreg_host_class;
957 error = transport_class_register(&fc_rport_class);
958 if (error)
959 goto unreg_vport_class;
960 error = transport_class_register(&fc_transport_class);
961 if (error)
962 goto unreg_rport_class;
963 return 0;
964
965unreg_rport_class:
966 transport_class_unregister(&fc_rport_class);
967unreg_vport_class:
968 transport_class_unregister(&fc_vport_class);
969unreg_host_class:
970 transport_class_unregister(&fc_host_class);
971 return error;
972}
973
974static void __exit fc_transport_exit(void)
975{
976 transport_class_unregister(&fc_transport_class);
977 transport_class_unregister(&fc_rport_class);
978 transport_class_unregister(&fc_host_class);
979 transport_class_unregister(&fc_vport_class);
980}
981
982/*
983 * FC Remote Port Attribute Management
984 */
985
986#define fc_rport_show_function(field, format_string, sz, cast) \
987static ssize_t \
988show_fc_rport_##field (struct device *dev, \
989 struct device_attribute *attr, char *buf) \
990{ \
991 struct fc_rport *rport = transport_class_to_rport(dev); \
992 struct Scsi_Host *shost = rport_to_shost(rport); \
993 struct fc_internal *i = to_fc_internal(shost->transportt); \
994 if ((i->f->get_rport_##field) && \
995 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
996 (rport->port_state == FC_PORTSTATE_DELETED) || \
997 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
998 i->f->get_rport_##field(rport); \
999 return snprintf(buf, sz, format_string, cast rport->field); \
1000}
1001
1002#define fc_rport_store_function(field) \
1003static ssize_t \
1004store_fc_rport_##field(struct device *dev, \
1005 struct device_attribute *attr, \
1006 const char *buf, size_t count) \
1007{ \
1008 int val; \
1009 struct fc_rport *rport = transport_class_to_rport(dev); \
1010 struct Scsi_Host *shost = rport_to_shost(rport); \
1011 struct fc_internal *i = to_fc_internal(shost->transportt); \
1012 char *cp; \
1013 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
1014 (rport->port_state == FC_PORTSTATE_DELETED) || \
1015 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
1016 return -EBUSY; \
1017 val = simple_strtoul(buf, &cp, 0); \
1018 if (*cp && (*cp != '\n')) \
1019 return -EINVAL; \
1020 i->f->set_rport_##field(rport, val); \
1021 return count; \
1022}
1023
1024#define fc_rport_rd_attr(field, format_string, sz) \
1025 fc_rport_show_function(field, format_string, sz, ) \
1026static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1027 show_fc_rport_##field, NULL)
1028
1029#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
1030 fc_rport_show_function(field, format_string, sz, (cast)) \
1031static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1032 show_fc_rport_##field, NULL)
1033
1034#define fc_rport_rw_attr(field, format_string, sz) \
1035 fc_rport_show_function(field, format_string, sz, ) \
1036 fc_rport_store_function(field) \
1037static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1038 show_fc_rport_##field, \
1039 store_fc_rport_##field)
1040
1041
1042#define fc_private_rport_show_function(field, format_string, sz, cast) \
1043static ssize_t \
1044show_fc_rport_##field (struct device *dev, \
1045 struct device_attribute *attr, char *buf) \
1046{ \
1047 struct fc_rport *rport = transport_class_to_rport(dev); \
1048 return snprintf(buf, sz, format_string, cast rport->field); \
1049}
1050
1051#define fc_private_rport_rd_attr(field, format_string, sz) \
1052 fc_private_rport_show_function(field, format_string, sz, ) \
1053static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1054 show_fc_rport_##field, NULL)
1055
1056#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
1057 fc_private_rport_show_function(field, format_string, sz, (cast)) \
1058static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1059 show_fc_rport_##field, NULL)
1060
1061
1062#define fc_private_rport_rd_enum_attr(title, maxlen) \
1063static ssize_t \
1064show_fc_rport_##title (struct device *dev, \
1065 struct device_attribute *attr, char *buf) \
1066{ \
1067 struct fc_rport *rport = transport_class_to_rport(dev); \
1068 const char *name; \
1069 name = get_fc_##title##_name(rport->title); \
1070 if (!name) \
1071 return -EINVAL; \
1072 return snprintf(buf, maxlen, "%s\n", name); \
1073} \
1074static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1075 show_fc_rport_##title, NULL)
1076
1077
1078#define SETUP_RPORT_ATTRIBUTE_RD(field) \
1079 i->private_rport_attrs[count] = device_attr_rport_##field; \
1080 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
1081 i->private_rport_attrs[count].store = NULL; \
1082 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1083 if (i->f->show_rport_##field) \
1084 count++
1085
1086#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
1087 i->private_rport_attrs[count] = device_attr_rport_##field; \
1088 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
1089 i->private_rport_attrs[count].store = NULL; \
1090 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1091 count++
1092
1093#define SETUP_RPORT_ATTRIBUTE_RW(field) \
1094 i->private_rport_attrs[count] = device_attr_rport_##field; \
1095 if (!i->f->set_rport_##field) { \
1096 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
1097 i->private_rport_attrs[count].store = NULL; \
1098 } \
1099 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1100 if (i->f->show_rport_##field) \
1101 count++
1102
1103#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
1104{ \
1105 i->private_rport_attrs[count] = device_attr_rport_##field; \
1106 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1107 count++; \
1108}
1109
1110
1111/* The FC Transport Remote Port Attributes: */
1112
1113/* Fixed Remote Port Attributes */
1114
1115fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
1116
1117static ssize_t
1118show_fc_rport_supported_classes (struct device *dev,
1119 struct device_attribute *attr, char *buf)
1120{
1121 struct fc_rport *rport = transport_class_to_rport(dev);
1122 if (rport->supported_classes == FC_COS_UNSPECIFIED)
1123 return snprintf(buf, 20, "unspecified\n");
1124 return get_fc_cos_names(rport->supported_classes, buf);
1125}
1126static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1127 show_fc_rport_supported_classes, NULL);
1128
1129/* Dynamic Remote Port Attributes */
1130
1131/*
1132 * dev_loss_tmo attribute
1133 */
1134static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
1135{
1136 char *cp;
1137
1138 *val = simple_strtoul(buf, &cp, 0);
1139 if (*cp && (*cp != '\n'))
1140 return -EINVAL;
1141 /*
1142 * Check for overflow; dev_loss_tmo is u32
1143 */
1144 if (*val > UINT_MAX)
1145 return -EINVAL;
1146
1147 return 0;
1148}
1149
1150static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
1151 unsigned long val)
1152{
1153 struct Scsi_Host *shost = rport_to_shost(rport);
1154 struct fc_internal *i = to_fc_internal(shost->transportt);
1155
1156 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
1157 (rport->port_state == FC_PORTSTATE_DELETED) ||
1158 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
1159 return -EBUSY;
1160 /*
1161 * Check for overflow; dev_loss_tmo is u32
1162 */
1163 if (val > UINT_MAX)
1164 return -EINVAL;
1165
1166 /*
1167 * If fast_io_fail is off we have to cap
1168 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
1169 */
1170 if (rport->fast_io_fail_tmo == -1 &&
1171 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
1172 return -EINVAL;
1173
1174 i->f->set_rport_dev_loss_tmo(rport, val);
1175 return 0;
1176}
1177
1178fc_rport_show_function(dev_loss_tmo, "%u\n", 20, )
1179static ssize_t
1180store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
1181 const char *buf, size_t count)
1182{
1183 struct fc_rport *rport = transport_class_to_rport(dev);
1184 unsigned long val;
1185 int rc;
1186
1187 rc = fc_str_to_dev_loss(buf, &val);
1188 if (rc)
1189 return rc;
1190
1191 rc = fc_rport_set_dev_loss_tmo(rport, val);
1192 if (rc)
1193 return rc;
1194 return count;
1195}
1196static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
1197 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1198
1199
1200/* Private Remote Port Attributes */
1201
1202fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1203fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1204fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
1205
1206static ssize_t
1207show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
1208 char *buf)
1209{
1210 struct fc_rport *rport = transport_class_to_rport(dev);
1211
1212 /* identify any roles that are port_id specific */
1213 if ((rport->port_id != -1) &&
1214 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
1215 FC_WELLKNOWN_PORTID_MASK) {
1216 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
1217 case FC_FPORT_PORTID:
1218 return snprintf(buf, 30, "Fabric Port\n");
1219 case FC_FABCTLR_PORTID:
1220 return snprintf(buf, 30, "Fabric Controller\n");
1221 case FC_DIRSRVR_PORTID:
1222 return snprintf(buf, 30, "Directory Server\n");
1223 case FC_TIMESRVR_PORTID:
1224 return snprintf(buf, 30, "Time Server\n");
1225 case FC_MGMTSRVR_PORTID:
1226 return snprintf(buf, 30, "Management Server\n");
1227 default:
1228 return snprintf(buf, 30, "Unknown Fabric Entity\n");
1229 }
1230 } else {
1231 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1232 return snprintf(buf, 20, "unknown\n");
1233 return get_fc_port_roles_names(rport->roles, buf);
1234 }
1235}
1236static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1237 show_fc_rport_roles, NULL);
1238
1239static ssize_t fc_rport_set_marginal_state(struct device *dev,
1240 struct device_attribute *attr,
1241 const char *buf, size_t count)
1242{
1243 struct fc_rport *rport = transport_class_to_rport(dev);
1244 enum fc_port_state port_state;
1245 int ret = 0;
1246
1247 ret = get_fc_port_state_match(buf, &port_state);
1248 if (ret)
1249 return -EINVAL;
1250 if (port_state == FC_PORTSTATE_MARGINAL) {
1251 /*
1252 * Change the state to Marginal only if the
1253 * current rport state is Online
1254 * Allow only Online->Marginal
1255 */
1256 if (rport->port_state == FC_PORTSTATE_ONLINE)
1257 rport->port_state = port_state;
1258 else
1259 return -EINVAL;
1260 } else if (port_state == FC_PORTSTATE_ONLINE) {
1261 /*
1262 * Change the state to Online only if the
1263 * current rport state is Marginal
1264 * Allow only Marginal->Online
1265 */
1266 if (rport->port_state == FC_PORTSTATE_MARGINAL)
1267 rport->port_state = port_state;
1268 else
1269 return -EINVAL;
1270 } else
1271 return -EINVAL;
1272 return count;
1273}
1274
1275static ssize_t
1276show_fc_rport_port_state(struct device *dev,
1277 struct device_attribute *attr, char *buf)
1278{
1279 const char *name;
1280 struct fc_rport *rport = transport_class_to_rport(dev);
1281
1282 name = get_fc_port_state_name(rport->port_state);
1283 if (!name)
1284 return -EINVAL;
1285
1286 return snprintf(buf, 20, "%s\n", name);
1287}
1288
1289static FC_DEVICE_ATTR(rport, port_state, 0444 | 0200,
1290 show_fc_rport_port_state, fc_rport_set_marginal_state);
1291
1292fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
1293
1294/*
1295 * fast_io_fail_tmo attribute
1296 */
1297static ssize_t
1298show_fc_rport_fast_io_fail_tmo (struct device *dev,
1299 struct device_attribute *attr, char *buf)
1300{
1301 struct fc_rport *rport = transport_class_to_rport(dev);
1302
1303 if (rport->fast_io_fail_tmo == -1)
1304 return snprintf(buf, 5, "off\n");
1305 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
1306}
1307
1308static ssize_t
1309store_fc_rport_fast_io_fail_tmo(struct device *dev,
1310 struct device_attribute *attr, const char *buf,
1311 size_t count)
1312{
1313 int val;
1314 char *cp;
1315 struct fc_rport *rport = transport_class_to_rport(dev);
1316
1317 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
1318 (rport->port_state == FC_PORTSTATE_DELETED) ||
1319 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
1320 return -EBUSY;
1321 if (strncmp(buf, "off", 3) == 0)
1322 rport->fast_io_fail_tmo = -1;
1323 else {
1324 val = simple_strtoul(buf, &cp, 0);
1325 if ((*cp && (*cp != '\n')) || (val < 0))
1326 return -EINVAL;
1327 /*
1328 * Cap fast_io_fail by dev_loss_tmo or
1329 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
1330 */
1331 if ((val >= rport->dev_loss_tmo) ||
1332 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
1333 return -EINVAL;
1334
1335 rport->fast_io_fail_tmo = val;
1336 }
1337 return count;
1338}
1339static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1340 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1341
1342#define fc_rport_fpin_statistic(name) \
1343static ssize_t fc_rport_fpinstat_##name(struct device *cd, \
1344 struct device_attribute *attr, \
1345 char *buf) \
1346{ \
1347 struct fc_rport *rport = transport_class_to_rport(cd); \
1348 \
1349 return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \
1350} \
1351static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL)
1352
1353fc_rport_fpin_statistic(dn);
1354fc_rport_fpin_statistic(dn_unknown);
1355fc_rport_fpin_statistic(dn_timeout);
1356fc_rport_fpin_statistic(dn_unable_to_route);
1357fc_rport_fpin_statistic(dn_device_specific);
1358fc_rport_fpin_statistic(cn);
1359fc_rport_fpin_statistic(cn_clear);
1360fc_rport_fpin_statistic(cn_lost_credit);
1361fc_rport_fpin_statistic(cn_credit_stall);
1362fc_rport_fpin_statistic(cn_oversubscription);
1363fc_rport_fpin_statistic(cn_device_specific);
1364fc_rport_fpin_statistic(li);
1365fc_rport_fpin_statistic(li_failure_unknown);
1366fc_rport_fpin_statistic(li_link_failure_count);
1367fc_rport_fpin_statistic(li_loss_of_sync_count);
1368fc_rport_fpin_statistic(li_loss_of_signals_count);
1369fc_rport_fpin_statistic(li_prim_seq_err_count);
1370fc_rport_fpin_statistic(li_invalid_tx_word_count);
1371fc_rport_fpin_statistic(li_invalid_crc_count);
1372fc_rport_fpin_statistic(li_device_specific);
1373
1374static struct attribute *fc_rport_statistics_attrs[] = {
1375 &device_attr_rport_fpin_dn.attr,
1376 &device_attr_rport_fpin_dn_unknown.attr,
1377 &device_attr_rport_fpin_dn_timeout.attr,
1378 &device_attr_rport_fpin_dn_unable_to_route.attr,
1379 &device_attr_rport_fpin_dn_device_specific.attr,
1380 &device_attr_rport_fpin_li.attr,
1381 &device_attr_rport_fpin_li_failure_unknown.attr,
1382 &device_attr_rport_fpin_li_link_failure_count.attr,
1383 &device_attr_rport_fpin_li_loss_of_sync_count.attr,
1384 &device_attr_rport_fpin_li_loss_of_signals_count.attr,
1385 &device_attr_rport_fpin_li_prim_seq_err_count.attr,
1386 &device_attr_rport_fpin_li_invalid_tx_word_count.attr,
1387 &device_attr_rport_fpin_li_invalid_crc_count.attr,
1388 &device_attr_rport_fpin_li_device_specific.attr,
1389 &device_attr_rport_fpin_cn.attr,
1390 &device_attr_rport_fpin_cn_clear.attr,
1391 &device_attr_rport_fpin_cn_lost_credit.attr,
1392 &device_attr_rport_fpin_cn_credit_stall.attr,
1393 &device_attr_rport_fpin_cn_oversubscription.attr,
1394 &device_attr_rport_fpin_cn_device_specific.attr,
1395 NULL
1396};
1397
1398static struct attribute_group fc_rport_statistics_group = {
1399 .name = "statistics",
1400 .attrs = fc_rport_statistics_attrs,
1401};
1402
1403
1404/*
1405 * FC SCSI Target Attribute Management
1406 */
1407
1408/*
1409 * Note: in the target show function we recognize when the remote
1410 * port is in the hierarchy and do not allow the driver to get
1411 * involved in sysfs functions. The driver only gets involved if
1412 * it's the "old" style that doesn't use rports.
1413 */
1414#define fc_starget_show_function(field, format_string, sz, cast) \
1415static ssize_t \
1416show_fc_starget_##field (struct device *dev, \
1417 struct device_attribute *attr, char *buf) \
1418{ \
1419 struct scsi_target *starget = transport_class_to_starget(dev); \
1420 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1421 struct fc_internal *i = to_fc_internal(shost->transportt); \
1422 struct fc_rport *rport = starget_to_rport(starget); \
1423 if (rport) \
1424 fc_starget_##field(starget) = rport->field; \
1425 else if (i->f->get_starget_##field) \
1426 i->f->get_starget_##field(starget); \
1427 return snprintf(buf, sz, format_string, \
1428 cast fc_starget_##field(starget)); \
1429}
1430
1431#define fc_starget_rd_attr(field, format_string, sz) \
1432 fc_starget_show_function(field, format_string, sz, ) \
1433static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1434 show_fc_starget_##field, NULL)
1435
1436#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1437 fc_starget_show_function(field, format_string, sz, (cast)) \
1438static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1439 show_fc_starget_##field, NULL)
1440
1441#define SETUP_STARGET_ATTRIBUTE_RD(field) \
1442 i->private_starget_attrs[count] = device_attr_starget_##field; \
1443 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1444 i->private_starget_attrs[count].store = NULL; \
1445 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1446 if (i->f->show_starget_##field) \
1447 count++
1448
1449#define SETUP_STARGET_ATTRIBUTE_RW(field) \
1450 i->private_starget_attrs[count] = device_attr_starget_##field; \
1451 if (!i->f->set_starget_##field) { \
1452 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1453 i->private_starget_attrs[count].store = NULL; \
1454 } \
1455 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1456 if (i->f->show_starget_##field) \
1457 count++
1458
1459/* The FC Transport SCSI Target Attributes: */
1460fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1461fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1462fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1463
1464
1465/*
1466 * FC Virtual Port Attribute Management
1467 */
1468
1469#define fc_vport_show_function(field, format_string, sz, cast) \
1470static ssize_t \
1471show_fc_vport_##field (struct device *dev, \
1472 struct device_attribute *attr, char *buf) \
1473{ \
1474 struct fc_vport *vport = transport_class_to_vport(dev); \
1475 struct Scsi_Host *shost = vport_to_shost(vport); \
1476 struct fc_internal *i = to_fc_internal(shost->transportt); \
1477 if ((i->f->get_vport_##field) && \
1478 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1479 i->f->get_vport_##field(vport); \
1480 return snprintf(buf, sz, format_string, cast vport->field); \
1481}
1482
1483#define fc_vport_store_function(field) \
1484static ssize_t \
1485store_fc_vport_##field(struct device *dev, \
1486 struct device_attribute *attr, \
1487 const char *buf, size_t count) \
1488{ \
1489 int val; \
1490 struct fc_vport *vport = transport_class_to_vport(dev); \
1491 struct Scsi_Host *shost = vport_to_shost(vport); \
1492 struct fc_internal *i = to_fc_internal(shost->transportt); \
1493 char *cp; \
1494 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1495 return -EBUSY; \
1496 val = simple_strtoul(buf, &cp, 0); \
1497 if (*cp && (*cp != '\n')) \
1498 return -EINVAL; \
1499 i->f->set_vport_##field(vport, val); \
1500 return count; \
1501}
1502
1503#define fc_vport_store_str_function(field, slen) \
1504static ssize_t \
1505store_fc_vport_##field(struct device *dev, \
1506 struct device_attribute *attr, \
1507 const char *buf, size_t count) \
1508{ \
1509 struct fc_vport *vport = transport_class_to_vport(dev); \
1510 struct Scsi_Host *shost = vport_to_shost(vport); \
1511 struct fc_internal *i = to_fc_internal(shost->transportt); \
1512 unsigned int cnt=count; \
1513 \
1514 /* count may include a LF at end of string */ \
1515 if (buf[cnt-1] == '\n') \
1516 cnt--; \
1517 if (cnt > ((slen) - 1)) \
1518 return -EINVAL; \
1519 memcpy(vport->field, buf, cnt); \
1520 i->f->set_vport_##field(vport); \
1521 return count; \
1522}
1523
1524#define fc_vport_rd_attr(field, format_string, sz) \
1525 fc_vport_show_function(field, format_string, sz, ) \
1526static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1527 show_fc_vport_##field, NULL)
1528
1529#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1530 fc_vport_show_function(field, format_string, sz, (cast)) \
1531static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1532 show_fc_vport_##field, NULL)
1533
1534#define fc_vport_rw_attr(field, format_string, sz) \
1535 fc_vport_show_function(field, format_string, sz, ) \
1536 fc_vport_store_function(field) \
1537static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1538 show_fc_vport_##field, \
1539 store_fc_vport_##field)
1540
1541#define fc_private_vport_show_function(field, format_string, sz, cast) \
1542static ssize_t \
1543show_fc_vport_##field (struct device *dev, \
1544 struct device_attribute *attr, char *buf) \
1545{ \
1546 struct fc_vport *vport = transport_class_to_vport(dev); \
1547 return snprintf(buf, sz, format_string, cast vport->field); \
1548}
1549
1550#define fc_private_vport_store_u32_function(field) \
1551static ssize_t \
1552store_fc_vport_##field(struct device *dev, \
1553 struct device_attribute *attr, \
1554 const char *buf, size_t count) \
1555{ \
1556 u32 val; \
1557 struct fc_vport *vport = transport_class_to_vport(dev); \
1558 char *cp; \
1559 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1560 return -EBUSY; \
1561 val = simple_strtoul(buf, &cp, 0); \
1562 if (*cp && (*cp != '\n')) \
1563 return -EINVAL; \
1564 vport->field = val; \
1565 return count; \
1566}
1567
1568
1569#define fc_private_vport_rd_attr(field, format_string, sz) \
1570 fc_private_vport_show_function(field, format_string, sz, ) \
1571static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1572 show_fc_vport_##field, NULL)
1573
1574#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1575 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1576static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1577 show_fc_vport_##field, NULL)
1578
1579#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1580 fc_private_vport_show_function(field, format_string, sz, ) \
1581 fc_private_vport_store_u32_function(field) \
1582static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1583 show_fc_vport_##field, \
1584 store_fc_vport_##field)
1585
1586
1587#define fc_private_vport_rd_enum_attr(title, maxlen) \
1588static ssize_t \
1589show_fc_vport_##title (struct device *dev, \
1590 struct device_attribute *attr, \
1591 char *buf) \
1592{ \
1593 struct fc_vport *vport = transport_class_to_vport(dev); \
1594 const char *name; \
1595 name = get_fc_##title##_name(vport->title); \
1596 if (!name) \
1597 return -EINVAL; \
1598 return snprintf(buf, maxlen, "%s\n", name); \
1599} \
1600static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1601 show_fc_vport_##title, NULL)
1602
1603
1604#define SETUP_VPORT_ATTRIBUTE_RD(field) \
1605 i->private_vport_attrs[count] = device_attr_vport_##field; \
1606 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1607 i->private_vport_attrs[count].store = NULL; \
1608 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1609 if (i->f->get_##field) \
1610 count++
1611 /* NOTE: Above MACRO differs: checks function not show bit */
1612
1613#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1614 i->private_vport_attrs[count] = device_attr_vport_##field; \
1615 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1616 i->private_vport_attrs[count].store = NULL; \
1617 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1618 count++
1619
1620#define SETUP_VPORT_ATTRIBUTE_WR(field) \
1621 i->private_vport_attrs[count] = device_attr_vport_##field; \
1622 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1623 if (i->f->field) \
1624 count++
1625 /* NOTE: Above MACRO differs: checks function */
1626
1627#define SETUP_VPORT_ATTRIBUTE_RW(field) \
1628 i->private_vport_attrs[count] = device_attr_vport_##field; \
1629 if (!i->f->set_vport_##field) { \
1630 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1631 i->private_vport_attrs[count].store = NULL; \
1632 } \
1633 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1634 count++
1635 /* NOTE: Above MACRO differs: does not check show bit */
1636
1637#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1638{ \
1639 i->private_vport_attrs[count] = device_attr_vport_##field; \
1640 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1641 count++; \
1642}
1643
1644
1645/* The FC Transport Virtual Port Attributes: */
1646
1647/* Fixed Virtual Port Attributes */
1648
1649/* Dynamic Virtual Port Attributes */
1650
1651/* Private Virtual Port Attributes */
1652
1653fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1654fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1655fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1656fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1657
1658static ssize_t
1659show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1660 char *buf)
1661{
1662 struct fc_vport *vport = transport_class_to_vport(dev);
1663
1664 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1665 return snprintf(buf, 20, "unknown\n");
1666 return get_fc_port_roles_names(vport->roles, buf);
1667}
1668static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1669
1670fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1671
1672fc_private_vport_show_function(symbolic_name, "%s\n",
1673 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1674fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1675static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1676 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1677
1678static ssize_t
1679store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1680 const char *buf, size_t count)
1681{
1682 struct fc_vport *vport = transport_class_to_vport(dev);
1683 struct Scsi_Host *shost = vport_to_shost(vport);
1684 unsigned long flags;
1685
1686 spin_lock_irqsave(shost->host_lock, flags);
1687 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1688 spin_unlock_irqrestore(shost->host_lock, flags);
1689 return -EBUSY;
1690 }
1691 vport->flags |= FC_VPORT_DELETING;
1692 spin_unlock_irqrestore(shost->host_lock, flags);
1693
1694 fc_queue_work(shost, &vport->vport_delete_work);
1695 return count;
1696}
1697static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1698 NULL, store_fc_vport_delete);
1699
1700
1701/*
1702 * Enable/Disable vport
1703 * Write "1" to disable, write "0" to enable
1704 */
1705static ssize_t
1706store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1707 const char *buf,
1708 size_t count)
1709{
1710 struct fc_vport *vport = transport_class_to_vport(dev);
1711 struct Scsi_Host *shost = vport_to_shost(vport);
1712 struct fc_internal *i = to_fc_internal(shost->transportt);
1713 int stat;
1714
1715 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1716 return -EBUSY;
1717
1718 if (*buf == '0') {
1719 if (vport->vport_state != FC_VPORT_DISABLED)
1720 return -EALREADY;
1721 } else if (*buf == '1') {
1722 if (vport->vport_state == FC_VPORT_DISABLED)
1723 return -EALREADY;
1724 } else
1725 return -EINVAL;
1726
1727 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1728 return stat ? stat : count;
1729}
1730static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1731 NULL, store_fc_vport_disable);
1732
1733
1734/*
1735 * Host Attribute Management
1736 */
1737
1738#define fc_host_show_function(field, format_string, sz, cast) \
1739static ssize_t \
1740show_fc_host_##field (struct device *dev, \
1741 struct device_attribute *attr, char *buf) \
1742{ \
1743 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1744 struct fc_internal *i = to_fc_internal(shost->transportt); \
1745 if (i->f->get_host_##field) \
1746 i->f->get_host_##field(shost); \
1747 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1748}
1749
1750#define fc_host_store_function(field) \
1751static ssize_t \
1752store_fc_host_##field(struct device *dev, \
1753 struct device_attribute *attr, \
1754 const char *buf, size_t count) \
1755{ \
1756 int val; \
1757 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1758 struct fc_internal *i = to_fc_internal(shost->transportt); \
1759 char *cp; \
1760 \
1761 val = simple_strtoul(buf, &cp, 0); \
1762 if (*cp && (*cp != '\n')) \
1763 return -EINVAL; \
1764 i->f->set_host_##field(shost, val); \
1765 return count; \
1766}
1767
1768#define fc_host_store_str_function(field, slen) \
1769static ssize_t \
1770store_fc_host_##field(struct device *dev, \
1771 struct device_attribute *attr, \
1772 const char *buf, size_t count) \
1773{ \
1774 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1775 struct fc_internal *i = to_fc_internal(shost->transportt); \
1776 unsigned int cnt=count; \
1777 \
1778 /* count may include a LF at end of string */ \
1779 if (buf[cnt-1] == '\n') \
1780 cnt--; \
1781 if (cnt > ((slen) - 1)) \
1782 return -EINVAL; \
1783 memcpy(fc_host_##field(shost), buf, cnt); \
1784 i->f->set_host_##field(shost); \
1785 return count; \
1786}
1787
1788#define fc_host_rd_attr(field, format_string, sz) \
1789 fc_host_show_function(field, format_string, sz, ) \
1790static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1791 show_fc_host_##field, NULL)
1792
1793#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1794 fc_host_show_function(field, format_string, sz, (cast)) \
1795static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1796 show_fc_host_##field, NULL)
1797
1798#define fc_host_rw_attr(field, format_string, sz) \
1799 fc_host_show_function(field, format_string, sz, ) \
1800 fc_host_store_function(field) \
1801static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1802 show_fc_host_##field, \
1803 store_fc_host_##field)
1804
1805#define fc_host_rd_enum_attr(title, maxlen) \
1806static ssize_t \
1807show_fc_host_##title (struct device *dev, \
1808 struct device_attribute *attr, char *buf) \
1809{ \
1810 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1811 struct fc_internal *i = to_fc_internal(shost->transportt); \
1812 const char *name; \
1813 if (i->f->get_host_##title) \
1814 i->f->get_host_##title(shost); \
1815 name = get_fc_##title##_name(fc_host_##title(shost)); \
1816 if (!name) \
1817 return -EINVAL; \
1818 return snprintf(buf, maxlen, "%s\n", name); \
1819} \
1820static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1821
1822#define SETUP_HOST_ATTRIBUTE_RD(field) \
1823 i->private_host_attrs[count] = device_attr_host_##field; \
1824 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1825 i->private_host_attrs[count].store = NULL; \
1826 i->host_attrs[count] = &i->private_host_attrs[count]; \
1827 if (i->f->show_host_##field) \
1828 count++
1829
1830#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1831 i->private_host_attrs[count] = device_attr_host_##field; \
1832 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1833 i->private_host_attrs[count].store = NULL; \
1834 i->host_attrs[count] = &i->private_host_attrs[count]; \
1835 count++
1836
1837#define SETUP_HOST_ATTRIBUTE_RW(field) \
1838 i->private_host_attrs[count] = device_attr_host_##field; \
1839 if (!i->f->set_host_##field) { \
1840 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1841 i->private_host_attrs[count].store = NULL; \
1842 } \
1843 i->host_attrs[count] = &i->private_host_attrs[count]; \
1844 if (i->f->show_host_##field) \
1845 count++
1846
1847
1848#define fc_private_host_show_function(field, format_string, sz, cast) \
1849static ssize_t \
1850show_fc_host_##field (struct device *dev, \
1851 struct device_attribute *attr, char *buf) \
1852{ \
1853 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1854 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1855}
1856
1857#define fc_private_host_rd_attr(field, format_string, sz) \
1858 fc_private_host_show_function(field, format_string, sz, ) \
1859static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1860 show_fc_host_##field, NULL)
1861
1862#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1863 fc_private_host_show_function(field, format_string, sz, (cast)) \
1864static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1865 show_fc_host_##field, NULL)
1866
1867#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1868 i->private_host_attrs[count] = device_attr_host_##field; \
1869 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1870 i->private_host_attrs[count].store = NULL; \
1871 i->host_attrs[count] = &i->private_host_attrs[count]; \
1872 count++
1873
1874#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1875{ \
1876 i->private_host_attrs[count] = device_attr_host_##field; \
1877 i->host_attrs[count] = &i->private_host_attrs[count]; \
1878 count++; \
1879}
1880
1881
1882/* Fixed Host Attributes */
1883
1884static ssize_t
1885show_fc_host_supported_classes (struct device *dev,
1886 struct device_attribute *attr, char *buf)
1887{
1888 struct Scsi_Host *shost = transport_class_to_shost(dev);
1889
1890 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1891 return snprintf(buf, 20, "unspecified\n");
1892
1893 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1894}
1895static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1896 show_fc_host_supported_classes, NULL);
1897
1898static ssize_t
1899show_fc_host_supported_fc4s (struct device *dev,
1900 struct device_attribute *attr, char *buf)
1901{
1902 struct Scsi_Host *shost = transport_class_to_shost(dev);
1903 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1904}
1905static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1906 show_fc_host_supported_fc4s, NULL);
1907
1908static ssize_t
1909show_fc_host_supported_speeds (struct device *dev,
1910 struct device_attribute *attr, char *buf)
1911{
1912 struct Scsi_Host *shost = transport_class_to_shost(dev);
1913
1914 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1915 return snprintf(buf, 20, "unknown\n");
1916
1917 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1918}
1919static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1920 show_fc_host_supported_speeds, NULL);
1921
1922
1923fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1924fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1925fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1926 unsigned long long);
1927fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1928fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1929fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1930fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1931fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1932fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1933fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1934fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1935fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1936fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1937
1938
1939/* Dynamic Host Attributes */
1940
1941static ssize_t
1942show_fc_host_active_fc4s (struct device *dev,
1943 struct device_attribute *attr, char *buf)
1944{
1945 struct Scsi_Host *shost = transport_class_to_shost(dev);
1946 struct fc_internal *i = to_fc_internal(shost->transportt);
1947
1948 if (i->f->get_host_active_fc4s)
1949 i->f->get_host_active_fc4s(shost);
1950
1951 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1952}
1953static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1954 show_fc_host_active_fc4s, NULL);
1955
1956static ssize_t
1957show_fc_host_speed (struct device *dev,
1958 struct device_attribute *attr, char *buf)
1959{
1960 struct Scsi_Host *shost = transport_class_to_shost(dev);
1961 struct fc_internal *i = to_fc_internal(shost->transportt);
1962
1963 if (i->f->get_host_speed)
1964 i->f->get_host_speed(shost);
1965
1966 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1967 return snprintf(buf, 20, "unknown\n");
1968
1969 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1970}
1971static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1972 show_fc_host_speed, NULL);
1973
1974
1975fc_host_rd_attr(port_id, "0x%06x\n", 20);
1976fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1977fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1978fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1979fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1980
1981fc_private_host_show_function(system_hostname, "%s\n",
1982 FC_SYMBOLIC_NAME_SIZE + 1, )
1983fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1984static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1985 show_fc_host_system_hostname, store_fc_host_system_hostname);
1986
1987
1988/* Private Host Attributes */
1989
1990static ssize_t
1991show_fc_private_host_tgtid_bind_type(struct device *dev,
1992 struct device_attribute *attr, char *buf)
1993{
1994 struct Scsi_Host *shost = transport_class_to_shost(dev);
1995 const char *name;
1996
1997 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1998 if (!name)
1999 return -EINVAL;
2000 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
2001}
2002
2003#define get_list_head_entry(pos, head, member) \
2004 pos = list_entry((head)->next, typeof(*pos), member)
2005
2006static ssize_t
2007store_fc_private_host_tgtid_bind_type(struct device *dev,
2008 struct device_attribute *attr, const char *buf, size_t count)
2009{
2010 struct Scsi_Host *shost = transport_class_to_shost(dev);
2011 struct fc_rport *rport;
2012 enum fc_tgtid_binding_type val;
2013 unsigned long flags;
2014
2015 if (get_fc_tgtid_bind_type_match(buf, &val))
2016 return -EINVAL;
2017
2018 /* if changing bind type, purge all unused consistent bindings */
2019 if (val != fc_host_tgtid_bind_type(shost)) {
2020 spin_lock_irqsave(shost->host_lock, flags);
2021 while (!list_empty(&fc_host_rport_bindings(shost))) {
2022 get_list_head_entry(rport,
2023 &fc_host_rport_bindings(shost), peers);
2024 list_del(&rport->peers);
2025 rport->port_state = FC_PORTSTATE_DELETED;
2026 fc_queue_work(shost, &rport->rport_delete_work);
2027 }
2028 spin_unlock_irqrestore(shost->host_lock, flags);
2029 }
2030
2031 fc_host_tgtid_bind_type(shost) = val;
2032 return count;
2033}
2034
2035static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
2036 show_fc_private_host_tgtid_bind_type,
2037 store_fc_private_host_tgtid_bind_type);
2038
2039static ssize_t
2040store_fc_private_host_issue_lip(struct device *dev,
2041 struct device_attribute *attr, const char *buf, size_t count)
2042{
2043 struct Scsi_Host *shost = transport_class_to_shost(dev);
2044 struct fc_internal *i = to_fc_internal(shost->transportt);
2045 int ret;
2046
2047 /* ignore any data value written to the attribute */
2048 if (i->f->issue_fc_host_lip) {
2049 ret = i->f->issue_fc_host_lip(shost);
2050 return ret ? ret: count;
2051 }
2052
2053 return -ENOENT;
2054}
2055
2056static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
2057 store_fc_private_host_issue_lip);
2058
2059static ssize_t
2060store_fc_private_host_dev_loss_tmo(struct device *dev,
2061 struct device_attribute *attr,
2062 const char *buf, size_t count)
2063{
2064 struct Scsi_Host *shost = transport_class_to_shost(dev);
2065 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2066 struct fc_rport *rport;
2067 unsigned long val, flags;
2068 int rc;
2069
2070 rc = fc_str_to_dev_loss(buf, &val);
2071 if (rc)
2072 return rc;
2073
2074 fc_host_dev_loss_tmo(shost) = val;
2075 spin_lock_irqsave(shost->host_lock, flags);
2076 list_for_each_entry(rport, &fc_host->rports, peers)
2077 fc_rport_set_dev_loss_tmo(rport, val);
2078 spin_unlock_irqrestore(shost->host_lock, flags);
2079 return count;
2080}
2081
2082fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
2083static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
2084 show_fc_host_dev_loss_tmo,
2085 store_fc_private_host_dev_loss_tmo);
2086
2087fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
2088
2089/*
2090 * Host Statistics Management
2091 */
2092
2093/* Show a given attribute in the statistics group */
2094static ssize_t
2095fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
2096{
2097 struct Scsi_Host *shost = transport_class_to_shost(dev);
2098 struct fc_internal *i = to_fc_internal(shost->transportt);
2099 struct fc_host_statistics *stats;
2100 ssize_t ret = -ENOENT;
2101
2102 if (offset > sizeof(struct fc_host_statistics) ||
2103 offset % sizeof(u64) != 0)
2104 WARN_ON(1);
2105
2106 if (i->f->get_fc_host_stats) {
2107 stats = (i->f->get_fc_host_stats)(shost);
2108 if (stats)
2109 ret = snprintf(buf, 20, "0x%llx\n",
2110 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
2111 }
2112 return ret;
2113}
2114
2115
2116/* generate a read-only statistics attribute */
2117#define fc_host_statistic(name) \
2118static ssize_t show_fcstat_##name(struct device *cd, \
2119 struct device_attribute *attr, \
2120 char *buf) \
2121{ \
2122 return fc_stat_show(cd, buf, \
2123 offsetof(struct fc_host_statistics, name)); \
2124} \
2125static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
2126
2127fc_host_statistic(seconds_since_last_reset);
2128fc_host_statistic(tx_frames);
2129fc_host_statistic(tx_words);
2130fc_host_statistic(rx_frames);
2131fc_host_statistic(rx_words);
2132fc_host_statistic(lip_count);
2133fc_host_statistic(nos_count);
2134fc_host_statistic(error_frames);
2135fc_host_statistic(dumped_frames);
2136fc_host_statistic(link_failure_count);
2137fc_host_statistic(loss_of_sync_count);
2138fc_host_statistic(loss_of_signal_count);
2139fc_host_statistic(prim_seq_protocol_err_count);
2140fc_host_statistic(invalid_tx_word_count);
2141fc_host_statistic(invalid_crc_count);
2142fc_host_statistic(fcp_input_requests);
2143fc_host_statistic(fcp_output_requests);
2144fc_host_statistic(fcp_control_requests);
2145fc_host_statistic(fcp_input_megabytes);
2146fc_host_statistic(fcp_output_megabytes);
2147fc_host_statistic(fcp_packet_alloc_failures);
2148fc_host_statistic(fcp_packet_aborts);
2149fc_host_statistic(fcp_frame_alloc_failures);
2150fc_host_statistic(fc_no_free_exch);
2151fc_host_statistic(fc_no_free_exch_xid);
2152fc_host_statistic(fc_xid_not_found);
2153fc_host_statistic(fc_xid_busy);
2154fc_host_statistic(fc_seq_not_found);
2155fc_host_statistic(fc_non_bls_resp);
2156fc_host_statistic(cn_sig_warn);
2157fc_host_statistic(cn_sig_alarm);
2158
2159
2160#define fc_host_fpin_statistic(name) \
2161static ssize_t fc_host_fpinstat_##name(struct device *cd, \
2162 struct device_attribute *attr, \
2163 char *buf) \
2164{ \
2165 struct Scsi_Host *shost = transport_class_to_shost(cd); \
2166 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \
2167 \
2168 return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \
2169} \
2170static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL)
2171
2172fc_host_fpin_statistic(dn);
2173fc_host_fpin_statistic(dn_unknown);
2174fc_host_fpin_statistic(dn_timeout);
2175fc_host_fpin_statistic(dn_unable_to_route);
2176fc_host_fpin_statistic(dn_device_specific);
2177fc_host_fpin_statistic(cn);
2178fc_host_fpin_statistic(cn_clear);
2179fc_host_fpin_statistic(cn_lost_credit);
2180fc_host_fpin_statistic(cn_credit_stall);
2181fc_host_fpin_statistic(cn_oversubscription);
2182fc_host_fpin_statistic(cn_device_specific);
2183fc_host_fpin_statistic(li);
2184fc_host_fpin_statistic(li_failure_unknown);
2185fc_host_fpin_statistic(li_link_failure_count);
2186fc_host_fpin_statistic(li_loss_of_sync_count);
2187fc_host_fpin_statistic(li_loss_of_signals_count);
2188fc_host_fpin_statistic(li_prim_seq_err_count);
2189fc_host_fpin_statistic(li_invalid_tx_word_count);
2190fc_host_fpin_statistic(li_invalid_crc_count);
2191fc_host_fpin_statistic(li_device_specific);
2192
2193static ssize_t
2194fc_reset_statistics(struct device *dev, struct device_attribute *attr,
2195 const char *buf, size_t count)
2196{
2197 struct Scsi_Host *shost = transport_class_to_shost(dev);
2198 struct fc_internal *i = to_fc_internal(shost->transportt);
2199
2200 /* ignore any data value written to the attribute */
2201 if (i->f->reset_fc_host_stats) {
2202 i->f->reset_fc_host_stats(shost);
2203 return count;
2204 }
2205
2206 return -ENOENT;
2207}
2208static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
2209 fc_reset_statistics);
2210
2211static struct attribute *fc_statistics_attrs[] = {
2212 &device_attr_host_seconds_since_last_reset.attr,
2213 &device_attr_host_tx_frames.attr,
2214 &device_attr_host_tx_words.attr,
2215 &device_attr_host_rx_frames.attr,
2216 &device_attr_host_rx_words.attr,
2217 &device_attr_host_lip_count.attr,
2218 &device_attr_host_nos_count.attr,
2219 &device_attr_host_error_frames.attr,
2220 &device_attr_host_dumped_frames.attr,
2221 &device_attr_host_link_failure_count.attr,
2222 &device_attr_host_loss_of_sync_count.attr,
2223 &device_attr_host_loss_of_signal_count.attr,
2224 &device_attr_host_prim_seq_protocol_err_count.attr,
2225 &device_attr_host_invalid_tx_word_count.attr,
2226 &device_attr_host_invalid_crc_count.attr,
2227 &device_attr_host_fcp_input_requests.attr,
2228 &device_attr_host_fcp_output_requests.attr,
2229 &device_attr_host_fcp_control_requests.attr,
2230 &device_attr_host_fcp_input_megabytes.attr,
2231 &device_attr_host_fcp_output_megabytes.attr,
2232 &device_attr_host_fcp_packet_alloc_failures.attr,
2233 &device_attr_host_fcp_packet_aborts.attr,
2234 &device_attr_host_fcp_frame_alloc_failures.attr,
2235 &device_attr_host_fc_no_free_exch.attr,
2236 &device_attr_host_fc_no_free_exch_xid.attr,
2237 &device_attr_host_fc_xid_not_found.attr,
2238 &device_attr_host_fc_xid_busy.attr,
2239 &device_attr_host_fc_seq_not_found.attr,
2240 &device_attr_host_fc_non_bls_resp.attr,
2241 &device_attr_host_cn_sig_warn.attr,
2242 &device_attr_host_cn_sig_alarm.attr,
2243 &device_attr_host_reset_statistics.attr,
2244 &device_attr_host_fpin_dn.attr,
2245 &device_attr_host_fpin_dn_unknown.attr,
2246 &device_attr_host_fpin_dn_timeout.attr,
2247 &device_attr_host_fpin_dn_unable_to_route.attr,
2248 &device_attr_host_fpin_dn_device_specific.attr,
2249 &device_attr_host_fpin_li.attr,
2250 &device_attr_host_fpin_li_failure_unknown.attr,
2251 &device_attr_host_fpin_li_link_failure_count.attr,
2252 &device_attr_host_fpin_li_loss_of_sync_count.attr,
2253 &device_attr_host_fpin_li_loss_of_signals_count.attr,
2254 &device_attr_host_fpin_li_prim_seq_err_count.attr,
2255 &device_attr_host_fpin_li_invalid_tx_word_count.attr,
2256 &device_attr_host_fpin_li_invalid_crc_count.attr,
2257 &device_attr_host_fpin_li_device_specific.attr,
2258 &device_attr_host_fpin_cn.attr,
2259 &device_attr_host_fpin_cn_clear.attr,
2260 &device_attr_host_fpin_cn_lost_credit.attr,
2261 &device_attr_host_fpin_cn_credit_stall.attr,
2262 &device_attr_host_fpin_cn_oversubscription.attr,
2263 &device_attr_host_fpin_cn_device_specific.attr,
2264 NULL
2265};
2266
2267static struct attribute_group fc_statistics_group = {
2268 .name = "statistics",
2269 .attrs = fc_statistics_attrs,
2270};
2271
2272
2273/* Host Vport Attributes */
2274
2275static int
2276fc_parse_wwn(const char *ns, u64 *nm)
2277{
2278 unsigned int i, j;
2279 u8 wwn[8];
2280
2281 memset(wwn, 0, sizeof(wwn));
2282
2283 /* Validate and store the new name */
2284 for (i=0, j=0; i < 16; i++) {
2285 int value;
2286
2287 value = hex_to_bin(*ns++);
2288 if (value >= 0)
2289 j = (j << 4) | value;
2290 else
2291 return -EINVAL;
2292 if (i % 2) {
2293 wwn[i/2] = j & 0xff;
2294 j = 0;
2295 }
2296 }
2297
2298 *nm = wwn_to_u64(wwn);
2299
2300 return 0;
2301}
2302
2303
2304/*
2305 * "Short-cut" sysfs variable to create a new vport on a FC Host.
2306 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
2307 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
2308 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
2309 */
2310static ssize_t
2311store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
2312 const char *buf, size_t count)
2313{
2314 struct Scsi_Host *shost = transport_class_to_shost(dev);
2315 struct fc_vport_identifiers vid;
2316 struct fc_vport *vport;
2317 unsigned int cnt=count;
2318 int stat;
2319
2320 memset(&vid, 0, sizeof(vid));
2321
2322 /* count may include a LF at end of string */
2323 if (buf[cnt-1] == '\n')
2324 cnt--;
2325
2326 /* validate we have enough characters for WWPN */
2327 if ((cnt != (16+1+16)) || (buf[16] != ':'))
2328 return -EINVAL;
2329
2330 stat = fc_parse_wwn(&buf[0], &vid.port_name);
2331 if (stat)
2332 return stat;
2333
2334 stat = fc_parse_wwn(&buf[17], &vid.node_name);
2335 if (stat)
2336 return stat;
2337
2338 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
2339 vid.vport_type = FC_PORTTYPE_NPIV;
2340 /* vid.symbolic_name is already zero/NULL's */
2341 vid.disable = false; /* always enabled */
2342
2343 /* we only allow support on Channel 0 !!! */
2344 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
2345 return stat ? stat : count;
2346}
2347static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
2348 store_fc_host_vport_create);
2349
2350
2351/*
2352 * "Short-cut" sysfs variable to delete a vport on a FC Host.
2353 * Vport is identified by a string containing "<WWPN>:<WWNN>".
2354 * The WWNs are specified as hex characters, and may *not* contain
2355 * any prefixes (e.g. 0x, x, etc)
2356 */
2357static ssize_t
2358store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
2359 const char *buf, size_t count)
2360{
2361 struct Scsi_Host *shost = transport_class_to_shost(dev);
2362 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2363 struct fc_vport *vport;
2364 u64 wwpn, wwnn;
2365 unsigned long flags;
2366 unsigned int cnt=count;
2367 int stat, match;
2368
2369 /* count may include a LF at end of string */
2370 if (buf[cnt-1] == '\n')
2371 cnt--;
2372
2373 /* validate we have enough characters for WWPN */
2374 if ((cnt != (16+1+16)) || (buf[16] != ':'))
2375 return -EINVAL;
2376
2377 stat = fc_parse_wwn(&buf[0], &wwpn);
2378 if (stat)
2379 return stat;
2380
2381 stat = fc_parse_wwn(&buf[17], &wwnn);
2382 if (stat)
2383 return stat;
2384
2385 spin_lock_irqsave(shost->host_lock, flags);
2386 match = 0;
2387 /* we only allow support on Channel 0 !!! */
2388 list_for_each_entry(vport, &fc_host->vports, peers) {
2389 if ((vport->channel == 0) &&
2390 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
2391 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
2392 break;
2393 vport->flags |= FC_VPORT_DELETING;
2394 match = 1;
2395 break;
2396 }
2397 }
2398 spin_unlock_irqrestore(shost->host_lock, flags);
2399
2400 if (!match)
2401 return -ENODEV;
2402
2403 stat = fc_vport_terminate(vport);
2404 return stat ? stat : count;
2405}
2406static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
2407 store_fc_host_vport_delete);
2408
2409
2410static int fc_host_match(struct attribute_container *cont,
2411 struct device *dev)
2412{
2413 struct Scsi_Host *shost;
2414 struct fc_internal *i;
2415
2416 if (!scsi_is_host_device(dev))
2417 return 0;
2418
2419 shost = dev_to_shost(dev);
2420 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2421 != &fc_host_class.class)
2422 return 0;
2423
2424 i = to_fc_internal(shost->transportt);
2425
2426 return &i->t.host_attrs.ac == cont;
2427}
2428
2429static int fc_target_match(struct attribute_container *cont,
2430 struct device *dev)
2431{
2432 struct Scsi_Host *shost;
2433 struct fc_internal *i;
2434
2435 if (!scsi_is_target_device(dev))
2436 return 0;
2437
2438 shost = dev_to_shost(dev->parent);
2439 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2440 != &fc_host_class.class)
2441 return 0;
2442
2443 i = to_fc_internal(shost->transportt);
2444
2445 return &i->t.target_attrs.ac == cont;
2446}
2447
2448static void fc_rport_dev_release(struct device *dev)
2449{
2450 struct fc_rport *rport = dev_to_rport(dev);
2451 put_device(dev->parent);
2452 kfree(rport);
2453}
2454
2455int scsi_is_fc_rport(const struct device *dev)
2456{
2457 return dev->release == fc_rport_dev_release;
2458}
2459EXPORT_SYMBOL(scsi_is_fc_rport);
2460
2461static int fc_rport_match(struct attribute_container *cont,
2462 struct device *dev)
2463{
2464 struct Scsi_Host *shost;
2465 struct fc_internal *i;
2466
2467 if (!scsi_is_fc_rport(dev))
2468 return 0;
2469
2470 shost = dev_to_shost(dev->parent);
2471 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2472 != &fc_host_class.class)
2473 return 0;
2474
2475 i = to_fc_internal(shost->transportt);
2476
2477 return &i->rport_attr_cont.ac == cont;
2478}
2479
2480
2481static void fc_vport_dev_release(struct device *dev)
2482{
2483 struct fc_vport *vport = dev_to_vport(dev);
2484 put_device(dev->parent); /* release kobj parent */
2485 kfree(vport);
2486}
2487
2488static int scsi_is_fc_vport(const struct device *dev)
2489{
2490 return dev->release == fc_vport_dev_release;
2491}
2492
2493static int fc_vport_match(struct attribute_container *cont,
2494 struct device *dev)
2495{
2496 struct fc_vport *vport;
2497 struct Scsi_Host *shost;
2498 struct fc_internal *i;
2499
2500 if (!scsi_is_fc_vport(dev))
2501 return 0;
2502 vport = dev_to_vport(dev);
2503
2504 shost = vport_to_shost(vport);
2505 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2506 != &fc_host_class.class)
2507 return 0;
2508
2509 i = to_fc_internal(shost->transportt);
2510 return &i->vport_attr_cont.ac == cont;
2511}
2512
2513
2514/**
2515 * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2516 * @scmd: The SCSI command which timed out
2517 *
2518 * This routine protects against error handlers getting invoked while a
2519 * rport is in a blocked state, typically due to a temporarily loss of
2520 * connectivity. If the error handlers are allowed to proceed, requests
2521 * to abort i/o, reset the target, etc will likely fail as there is no way
2522 * to communicate with the device to perform the requested function. These
2523 * failures may result in the midlayer taking the device offline, requiring
2524 * manual intervention to restore operation.
2525 *
2526 * This routine, called whenever an i/o times out, validates the state of
2527 * the underlying rport. If the rport is blocked, it returns
2528 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2529 * Eventually, either the device will return, or devloss_tmo will fire,
2530 * and when the timeout then fires, it will be handled normally.
2531 * If the rport is not blocked, normal error handling continues.
2532 *
2533 * Notes:
2534 * This routine assumes no locks are held on entry.
2535 */
2536enum scsi_timeout_action fc_eh_timed_out(struct scsi_cmnd *scmd)
2537{
2538 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2539
2540 if (rport->port_state == FC_PORTSTATE_BLOCKED)
2541 return SCSI_EH_RESET_TIMER;
2542
2543 return SCSI_EH_NOT_HANDLED;
2544}
2545EXPORT_SYMBOL(fc_eh_timed_out);
2546
2547/*
2548 * Called by fc_user_scan to locate an rport on the shost that
2549 * matches the channel and target id, and invoke scsi_scan_target()
2550 * on the rport.
2551 */
2552static void
2553fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2554{
2555 struct fc_rport *rport;
2556 unsigned long flags;
2557
2558 spin_lock_irqsave(shost->host_lock, flags);
2559
2560 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2561 if (rport->scsi_target_id == -1)
2562 continue;
2563
2564 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
2565 (rport->port_state != FC_PORTSTATE_MARGINAL))
2566 continue;
2567
2568 if ((channel == rport->channel) &&
2569 (id == rport->scsi_target_id)) {
2570 spin_unlock_irqrestore(shost->host_lock, flags);
2571 scsi_scan_target(&rport->dev, channel, id, lun,
2572 SCSI_SCAN_MANUAL);
2573 return;
2574 }
2575 }
2576
2577 spin_unlock_irqrestore(shost->host_lock, flags);
2578}
2579
2580/*
2581 * Called via sysfs scan routines. Necessary, as the FC transport
2582 * wants to place all target objects below the rport object. So this
2583 * routine must invoke the scsi_scan_target() routine with the rport
2584 * object as the parent.
2585 */
2586static int
2587fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2588{
2589 uint chlo, chhi;
2590 uint tgtlo, tgthi;
2591
2592 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2593 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2594 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2595 return -EINVAL;
2596
2597 if (channel == SCAN_WILD_CARD) {
2598 chlo = 0;
2599 chhi = shost->max_channel + 1;
2600 } else {
2601 chlo = channel;
2602 chhi = channel + 1;
2603 }
2604
2605 if (id == SCAN_WILD_CARD) {
2606 tgtlo = 0;
2607 tgthi = shost->max_id;
2608 } else {
2609 tgtlo = id;
2610 tgthi = id + 1;
2611 }
2612
2613 for ( ; chlo < chhi; chlo++)
2614 for ( ; tgtlo < tgthi; tgtlo++)
2615 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2616
2617 return 0;
2618}
2619
2620struct scsi_transport_template *
2621fc_attach_transport(struct fc_function_template *ft)
2622{
2623 int count;
2624 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2625 GFP_KERNEL);
2626
2627 if (unlikely(!i))
2628 return NULL;
2629
2630 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2631 i->t.target_attrs.ac.class = &fc_transport_class.class;
2632 i->t.target_attrs.ac.match = fc_target_match;
2633 i->t.target_size = sizeof(struct fc_starget_attrs);
2634 transport_container_register(&i->t.target_attrs);
2635
2636 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2637 i->t.host_attrs.ac.class = &fc_host_class.class;
2638 i->t.host_attrs.ac.match = fc_host_match;
2639 i->t.host_size = sizeof(struct fc_host_attrs);
2640 if (ft->get_fc_host_stats)
2641 i->t.host_attrs.statistics = &fc_statistics_group;
2642 transport_container_register(&i->t.host_attrs);
2643
2644 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2645 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2646 i->rport_attr_cont.ac.match = fc_rport_match;
2647 i->rport_attr_cont.statistics = &fc_rport_statistics_group;
2648 transport_container_register(&i->rport_attr_cont);
2649
2650 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2651 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2652 i->vport_attr_cont.ac.match = fc_vport_match;
2653 transport_container_register(&i->vport_attr_cont);
2654
2655 i->f = ft;
2656
2657 /* Transport uses the shost workq for scsi scanning */
2658 i->t.create_work_queue = 1;
2659
2660 i->t.user_scan = fc_user_scan;
2661
2662 /*
2663 * Setup SCSI Target Attributes.
2664 */
2665 count = 0;
2666 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2667 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2668 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2669
2670 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2671
2672 i->starget_attrs[count] = NULL;
2673
2674
2675 /*
2676 * Setup SCSI Host Attributes.
2677 */
2678 count=0;
2679 SETUP_HOST_ATTRIBUTE_RD(node_name);
2680 SETUP_HOST_ATTRIBUTE_RD(port_name);
2681 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2682 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2683 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2684 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2685 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2686 if (ft->vport_create) {
2687 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2688 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2689 }
2690 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2691 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2692 SETUP_HOST_ATTRIBUTE_RD(model);
2693 SETUP_HOST_ATTRIBUTE_RD(model_description);
2694 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2695 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2696 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2697 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2698
2699 SETUP_HOST_ATTRIBUTE_RD(port_id);
2700 SETUP_HOST_ATTRIBUTE_RD(port_type);
2701 SETUP_HOST_ATTRIBUTE_RD(port_state);
2702 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2703 SETUP_HOST_ATTRIBUTE_RD(speed);
2704 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2705 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2706 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2707
2708 /* Transport-managed attributes */
2709 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2710 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2711 if (ft->issue_fc_host_lip)
2712 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2713 if (ft->vport_create)
2714 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2715 if (ft->vport_delete)
2716 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2717
2718 BUG_ON(count > FC_HOST_NUM_ATTRS);
2719
2720 i->host_attrs[count] = NULL;
2721
2722 /*
2723 * Setup Remote Port Attributes.
2724 */
2725 count=0;
2726 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2727 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2728 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2729 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2730 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2731 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2732 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2733 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(port_state);
2734 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2735 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2736
2737 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2738
2739 i->rport_attrs[count] = NULL;
2740
2741 /*
2742 * Setup Virtual Port Attributes.
2743 */
2744 count=0;
2745 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2746 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2747 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2748 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2749 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2750 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2751 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2752 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2753 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2754
2755 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2756
2757 i->vport_attrs[count] = NULL;
2758
2759 return &i->t;
2760}
2761EXPORT_SYMBOL(fc_attach_transport);
2762
2763void fc_release_transport(struct scsi_transport_template *t)
2764{
2765 struct fc_internal *i = to_fc_internal(t);
2766
2767 transport_container_unregister(&i->t.target_attrs);
2768 transport_container_unregister(&i->t.host_attrs);
2769 transport_container_unregister(&i->rport_attr_cont);
2770 transport_container_unregister(&i->vport_attr_cont);
2771
2772 kfree(i);
2773}
2774EXPORT_SYMBOL(fc_release_transport);
2775
2776/**
2777 * fc_queue_work - Queue work to the fc_host workqueue.
2778 * @shost: Pointer to Scsi_Host bound to fc_host.
2779 * @work: Work to queue for execution.
2780 *
2781 * Return value:
2782 * 1 - work queued for execution
2783 * 0 - work is already queued
2784 * -EINVAL - work queue doesn't exist
2785 */
2786static int
2787fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2788{
2789 if (unlikely(!fc_host_work_q(shost))) {
2790 printk(KERN_ERR
2791 "ERROR: FC host '%s' attempted to queue work, "
2792 "when no workqueue created.\n", shost->hostt->name);
2793 dump_stack();
2794
2795 return -EINVAL;
2796 }
2797
2798 return queue_work(fc_host_work_q(shost), work);
2799}
2800
2801/**
2802 * fc_flush_work - Flush a fc_host's workqueue.
2803 * @shost: Pointer to Scsi_Host bound to fc_host.
2804 */
2805static void
2806fc_flush_work(struct Scsi_Host *shost)
2807{
2808 if (!fc_host_work_q(shost)) {
2809 printk(KERN_ERR
2810 "ERROR: FC host '%s' attempted to flush work, "
2811 "when no workqueue created.\n", shost->hostt->name);
2812 dump_stack();
2813 return;
2814 }
2815
2816 flush_workqueue(fc_host_work_q(shost));
2817}
2818
2819/**
2820 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2821 * @shost: Pointer to Scsi_Host bound to fc_host.
2822 * @work: Work to queue for execution.
2823 * @delay: jiffies to delay the work queuing
2824 *
2825 * Return value:
2826 * 1 on success / 0 already queued / < 0 for error
2827 */
2828static int
2829fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2830 unsigned long delay)
2831{
2832 if (unlikely(!fc_host_devloss_work_q(shost))) {
2833 printk(KERN_ERR
2834 "ERROR: FC host '%s' attempted to queue work, "
2835 "when no workqueue created.\n", shost->hostt->name);
2836 dump_stack();
2837
2838 return -EINVAL;
2839 }
2840
2841 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2842}
2843
2844/**
2845 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2846 * @shost: Pointer to Scsi_Host bound to fc_host.
2847 */
2848static void
2849fc_flush_devloss(struct Scsi_Host *shost)
2850{
2851 if (!fc_host_devloss_work_q(shost)) {
2852 printk(KERN_ERR
2853 "ERROR: FC host '%s' attempted to flush work, "
2854 "when no workqueue created.\n", shost->hostt->name);
2855 dump_stack();
2856 return;
2857 }
2858
2859 flush_workqueue(fc_host_devloss_work_q(shost));
2860}
2861
2862
2863/**
2864 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2865 * @shost: Which &Scsi_Host
2866 *
2867 * This routine is expected to be called immediately preceding the
2868 * a driver's call to scsi_remove_host().
2869 *
2870 * WARNING: A driver utilizing the fc_transport, which fails to call
2871 * this routine prior to scsi_remove_host(), will leave dangling
2872 * objects in /sys/class/fc_remote_ports. Access to any of these
2873 * objects can result in a system crash !!!
2874 *
2875 * Notes:
2876 * This routine assumes no locks are held on entry.
2877 */
2878void
2879fc_remove_host(struct Scsi_Host *shost)
2880{
2881 struct fc_vport *vport = NULL, *next_vport = NULL;
2882 struct fc_rport *rport = NULL, *next_rport = NULL;
2883 struct workqueue_struct *work_q;
2884 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2885 unsigned long flags;
2886
2887 spin_lock_irqsave(shost->host_lock, flags);
2888
2889 /* Remove any vports */
2890 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2891 vport->flags |= FC_VPORT_DELETING;
2892 fc_queue_work(shost, &vport->vport_delete_work);
2893 }
2894
2895 /* Remove any remote ports */
2896 list_for_each_entry_safe(rport, next_rport,
2897 &fc_host->rports, peers) {
2898 list_del(&rport->peers);
2899 rport->port_state = FC_PORTSTATE_DELETED;
2900 fc_queue_work(shost, &rport->rport_delete_work);
2901 }
2902
2903 list_for_each_entry_safe(rport, next_rport,
2904 &fc_host->rport_bindings, peers) {
2905 list_del(&rport->peers);
2906 rport->port_state = FC_PORTSTATE_DELETED;
2907 fc_queue_work(shost, &rport->rport_delete_work);
2908 }
2909
2910 spin_unlock_irqrestore(shost->host_lock, flags);
2911
2912 /* flush all scan work items */
2913 scsi_flush_work(shost);
2914
2915 /* flush all stgt delete, and rport delete work items, then kill it */
2916 if (fc_host->work_q) {
2917 work_q = fc_host->work_q;
2918 fc_host->work_q = NULL;
2919 destroy_workqueue(work_q);
2920 }
2921
2922 /* flush all devloss work items, then kill it */
2923 if (fc_host->devloss_work_q) {
2924 work_q = fc_host->devloss_work_q;
2925 fc_host->devloss_work_q = NULL;
2926 destroy_workqueue(work_q);
2927 }
2928}
2929EXPORT_SYMBOL(fc_remove_host);
2930
2931static void fc_terminate_rport_io(struct fc_rport *rport)
2932{
2933 struct Scsi_Host *shost = rport_to_shost(rport);
2934 struct fc_internal *i = to_fc_internal(shost->transportt);
2935
2936 /* Involve the LLDD if possible to terminate all io on the rport. */
2937 if (i->f->terminate_rport_io)
2938 i->f->terminate_rport_io(rport);
2939
2940 /*
2941 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2942 */
2943 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2944}
2945
2946/**
2947 * fc_starget_delete - called to delete the scsi descendants of an rport
2948 * @work: remote port to be operated on.
2949 *
2950 * Deletes target and all sdevs.
2951 */
2952static void
2953fc_starget_delete(struct work_struct *work)
2954{
2955 struct fc_rport *rport =
2956 container_of(work, struct fc_rport, stgt_delete_work);
2957
2958 fc_terminate_rport_io(rport);
2959 scsi_remove_target(&rport->dev);
2960}
2961
2962
2963/**
2964 * fc_rport_final_delete - finish rport termination and delete it.
2965 * @work: remote port to be deleted.
2966 */
2967static void
2968fc_rport_final_delete(struct work_struct *work)
2969{
2970 struct fc_rport *rport =
2971 container_of(work, struct fc_rport, rport_delete_work);
2972 struct device *dev = &rport->dev;
2973 struct Scsi_Host *shost = rport_to_shost(rport);
2974 struct fc_internal *i = to_fc_internal(shost->transportt);
2975 unsigned long flags;
2976 int do_callback = 0;
2977
2978 fc_terminate_rport_io(rport);
2979
2980 /*
2981 * if a scan is pending, flush the SCSI Host work_q so that
2982 * that we can reclaim the rport scan work element.
2983 */
2984 if (rport->flags & FC_RPORT_SCAN_PENDING)
2985 scsi_flush_work(shost);
2986
2987 /*
2988 * Cancel any outstanding timers. These should really exist
2989 * only when rmmod'ing the LLDD and we're asking for
2990 * immediate termination of the rports
2991 */
2992 spin_lock_irqsave(shost->host_lock, flags);
2993 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2994 spin_unlock_irqrestore(shost->host_lock, flags);
2995 if (!cancel_delayed_work(&rport->fail_io_work))
2996 fc_flush_devloss(shost);
2997 if (!cancel_delayed_work(&rport->dev_loss_work))
2998 fc_flush_devloss(shost);
2999 cancel_work_sync(&rport->scan_work);
3000 spin_lock_irqsave(shost->host_lock, flags);
3001 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3002 }
3003 spin_unlock_irqrestore(shost->host_lock, flags);
3004
3005 /* Delete SCSI target and sdevs */
3006 if (rport->scsi_target_id != -1)
3007 fc_starget_delete(&rport->stgt_delete_work);
3008
3009 /*
3010 * Notify the driver that the rport is now dead. The LLDD will
3011 * also guarantee that any communication to the rport is terminated
3012 *
3013 * Avoid this call if we already called it when we preserved the
3014 * rport for the binding.
3015 */
3016 spin_lock_irqsave(shost->host_lock, flags);
3017 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
3018 (i->f->dev_loss_tmo_callbk)) {
3019 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3020 do_callback = 1;
3021 }
3022 spin_unlock_irqrestore(shost->host_lock, flags);
3023
3024 if (do_callback)
3025 i->f->dev_loss_tmo_callbk(rport);
3026
3027 fc_bsg_remove(rport->rqst_q);
3028
3029 transport_remove_device(dev);
3030 device_del(dev);
3031 transport_destroy_device(dev);
3032 scsi_host_put(shost); /* for fc_host->rport list */
3033 put_device(dev); /* for self-reference */
3034}
3035
3036
3037/**
3038 * fc_remote_port_create - allocates and creates a remote FC port.
3039 * @shost: scsi host the remote port is connected to.
3040 * @channel: Channel on shost port connected to.
3041 * @ids: The world wide names, fc address, and FC4 port
3042 * roles for the remote port.
3043 *
3044 * Allocates and creates the remoter port structure, including the
3045 * class and sysfs creation.
3046 *
3047 * Notes:
3048 * This routine assumes no locks are held on entry.
3049 */
3050static struct fc_rport *
3051fc_remote_port_create(struct Scsi_Host *shost, int channel,
3052 struct fc_rport_identifiers *ids)
3053{
3054 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3055 struct fc_internal *fci = to_fc_internal(shost->transportt);
3056 struct fc_rport *rport;
3057 struct device *dev;
3058 unsigned long flags;
3059 int error;
3060 size_t size;
3061
3062 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
3063 rport = kzalloc(size, GFP_KERNEL);
3064 if (unlikely(!rport)) {
3065 printk(KERN_ERR "%s: allocation failure\n", __func__);
3066 return NULL;
3067 }
3068
3069 rport->maxframe_size = -1;
3070 rport->supported_classes = FC_COS_UNSPECIFIED;
3071 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
3072 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
3073 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
3074 rport->port_id = ids->port_id;
3075 rport->roles = ids->roles;
3076 rport->port_state = FC_PORTSTATE_ONLINE;
3077 if (fci->f->dd_fcrport_size)
3078 rport->dd_data = &rport[1];
3079 rport->channel = channel;
3080 rport->fast_io_fail_tmo = -1;
3081
3082 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
3083 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
3084 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
3085 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
3086 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
3087
3088 spin_lock_irqsave(shost->host_lock, flags);
3089
3090 rport->number = fc_host->next_rport_number++;
3091 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
3092 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
3093 rport->scsi_target_id = fc_host->next_target_id++;
3094 else
3095 rport->scsi_target_id = -1;
3096 list_add_tail(&rport->peers, &fc_host->rports);
3097 scsi_host_get(shost); /* for fc_host->rport list */
3098
3099 spin_unlock_irqrestore(shost->host_lock, flags);
3100
3101 dev = &rport->dev;
3102 device_initialize(dev); /* takes self reference */
3103 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
3104 dev->release = fc_rport_dev_release;
3105 dev_set_name(dev, "rport-%d:%d-%d",
3106 shost->host_no, channel, rport->number);
3107 transport_setup_device(dev);
3108
3109 error = device_add(dev);
3110 if (error) {
3111 printk(KERN_ERR "FC Remote Port device_add failed\n");
3112 goto delete_rport;
3113 }
3114 transport_add_device(dev);
3115 transport_configure_device(dev);
3116
3117 fc_bsg_rportadd(shost, rport);
3118 /* ignore any bsg add error - we just can't do sgio */
3119
3120 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
3121 /* initiate a scan of the target */
3122 rport->flags |= FC_RPORT_SCAN_PENDING;
3123 scsi_queue_work(shost, &rport->scan_work);
3124 }
3125
3126 return rport;
3127
3128delete_rport:
3129 transport_destroy_device(dev);
3130 spin_lock_irqsave(shost->host_lock, flags);
3131 list_del(&rport->peers);
3132 scsi_host_put(shost); /* for fc_host->rport list */
3133 spin_unlock_irqrestore(shost->host_lock, flags);
3134 put_device(dev->parent);
3135 kfree(rport);
3136 return NULL;
3137}
3138
3139/**
3140 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
3141 * @shost: scsi host the remote port is connected to.
3142 * @channel: Channel on shost port connected to.
3143 * @ids: The world wide names, fc address, and FC4 port
3144 * roles for the remote port.
3145 *
3146 * The LLDD calls this routine to notify the transport of the existence
3147 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
3148 * of the port, it's FC address (port_id), and the FC4 roles that are
3149 * active for the port.
3150 *
3151 * For ports that are FCP targets (aka scsi targets), the FC transport
3152 * maintains consistent target id bindings on behalf of the LLDD.
3153 * A consistent target id binding is an assignment of a target id to
3154 * a remote port identifier, which persists while the scsi host is
3155 * attached. The remote port can disappear, then later reappear, and
3156 * it's target id assignment remains the same. This allows for shifts
3157 * in FC addressing (if binding by wwpn or wwnn) with no apparent
3158 * changes to the scsi subsystem which is based on scsi host number and
3159 * target id values. Bindings are only valid during the attachment of
3160 * the scsi host. If the host detaches, then later re-attaches, target
3161 * id bindings may change.
3162 *
3163 * This routine is responsible for returning a remote port structure.
3164 * The routine will search the list of remote ports it maintains
3165 * internally on behalf of consistent target id mappings. If found, the
3166 * remote port structure will be reused. Otherwise, a new remote port
3167 * structure will be allocated.
3168 *
3169 * Whenever a remote port is allocated, a new fc_remote_port class
3170 * device is created.
3171 *
3172 * Should not be called from interrupt context.
3173 *
3174 * Notes:
3175 * This routine assumes no locks are held on entry.
3176 */
3177struct fc_rport *
3178fc_remote_port_add(struct Scsi_Host *shost, int channel,
3179 struct fc_rport_identifiers *ids)
3180{
3181 struct fc_internal *fci = to_fc_internal(shost->transportt);
3182 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3183 struct fc_rport *rport;
3184 unsigned long flags;
3185 int match = 0;
3186
3187 /* ensure any stgt delete functions are done */
3188 fc_flush_work(shost);
3189
3190 /*
3191 * Search the list of "active" rports, for an rport that has been
3192 * deleted, but we've held off the real delete while the target
3193 * is in a "blocked" state.
3194 */
3195 spin_lock_irqsave(shost->host_lock, flags);
3196
3197 list_for_each_entry(rport, &fc_host->rports, peers) {
3198
3199 if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
3200 rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
3201 (rport->channel == channel)) {
3202
3203 switch (fc_host->tgtid_bind_type) {
3204 case FC_TGTID_BIND_BY_WWPN:
3205 case FC_TGTID_BIND_NONE:
3206 if (rport->port_name == ids->port_name)
3207 match = 1;
3208 break;
3209 case FC_TGTID_BIND_BY_WWNN:
3210 if (rport->node_name == ids->node_name)
3211 match = 1;
3212 break;
3213 case FC_TGTID_BIND_BY_ID:
3214 if (rport->port_id == ids->port_id)
3215 match = 1;
3216 break;
3217 }
3218
3219 if (match) {
3220
3221 memcpy(&rport->node_name, &ids->node_name,
3222 sizeof(rport->node_name));
3223 memcpy(&rport->port_name, &ids->port_name,
3224 sizeof(rport->port_name));
3225 rport->port_id = ids->port_id;
3226
3227 rport->port_state = FC_PORTSTATE_ONLINE;
3228 rport->roles = ids->roles;
3229
3230 spin_unlock_irqrestore(shost->host_lock, flags);
3231
3232 if (fci->f->dd_fcrport_size)
3233 memset(rport->dd_data, 0,
3234 fci->f->dd_fcrport_size);
3235
3236 /*
3237 * If we were not a target, cancel the
3238 * io terminate and rport timers, and
3239 * we're done.
3240 *
3241 * If we were a target, but our new role
3242 * doesn't indicate a target, leave the
3243 * timers running expecting the role to
3244 * change as the target fully logs in. If
3245 * it doesn't, the target will be torn down.
3246 *
3247 * If we were a target, and our role shows
3248 * we're still a target, cancel the timers
3249 * and kick off a scan.
3250 */
3251
3252 /* was a target, not in roles */
3253 if ((rport->scsi_target_id != -1) &&
3254 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
3255 return rport;
3256
3257 /*
3258 * Stop the fail io and dev_loss timers.
3259 * If they flush, the port_state will
3260 * be checked and will NOOP the function.
3261 */
3262 if (!cancel_delayed_work(&rport->fail_io_work))
3263 fc_flush_devloss(shost);
3264 if (!cancel_delayed_work(&rport->dev_loss_work))
3265 fc_flush_devloss(shost);
3266
3267 spin_lock_irqsave(shost->host_lock, flags);
3268
3269 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3270 FC_RPORT_DEVLOSS_PENDING |
3271 FC_RPORT_DEVLOSS_CALLBK_DONE);
3272
3273 spin_unlock_irqrestore(shost->host_lock, flags);
3274
3275 /* if target, initiate a scan */
3276 if (rport->scsi_target_id != -1) {
3277 scsi_target_unblock(&rport->dev,
3278 SDEV_RUNNING);
3279 spin_lock_irqsave(shost->host_lock,
3280 flags);
3281 rport->flags |= FC_RPORT_SCAN_PENDING;
3282 scsi_queue_work(shost,
3283 &rport->scan_work);
3284 spin_unlock_irqrestore(shost->host_lock,
3285 flags);
3286 }
3287
3288 fc_bsg_goose_queue(rport);
3289
3290 return rport;
3291 }
3292 }
3293 }
3294
3295 /*
3296 * Search the bindings array
3297 * Note: if never a FCP target, you won't be on this list
3298 */
3299 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
3300
3301 /* search for a matching consistent binding */
3302
3303 list_for_each_entry(rport, &fc_host->rport_bindings,
3304 peers) {
3305 if (rport->channel != channel)
3306 continue;
3307
3308 switch (fc_host->tgtid_bind_type) {
3309 case FC_TGTID_BIND_BY_WWPN:
3310 if (rport->port_name == ids->port_name)
3311 match = 1;
3312 break;
3313 case FC_TGTID_BIND_BY_WWNN:
3314 if (rport->node_name == ids->node_name)
3315 match = 1;
3316 break;
3317 case FC_TGTID_BIND_BY_ID:
3318 if (rport->port_id == ids->port_id)
3319 match = 1;
3320 break;
3321 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3322 break;
3323 }
3324
3325 if (match) {
3326 list_move_tail(&rport->peers, &fc_host->rports);
3327 break;
3328 }
3329 }
3330
3331 if (match) {
3332 memcpy(&rport->node_name, &ids->node_name,
3333 sizeof(rport->node_name));
3334 memcpy(&rport->port_name, &ids->port_name,
3335 sizeof(rport->port_name));
3336 rport->port_id = ids->port_id;
3337 rport->port_state = FC_PORTSTATE_ONLINE;
3338 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3339
3340 if (fci->f->dd_fcrport_size)
3341 memset(rport->dd_data, 0,
3342 fci->f->dd_fcrport_size);
3343 spin_unlock_irqrestore(shost->host_lock, flags);
3344
3345 fc_remote_port_rolechg(rport, ids->roles);
3346 return rport;
3347 }
3348 }
3349
3350 spin_unlock_irqrestore(shost->host_lock, flags);
3351
3352 /* No consistent binding found - create new remote port entry */
3353 rport = fc_remote_port_create(shost, channel, ids);
3354
3355 return rport;
3356}
3357EXPORT_SYMBOL(fc_remote_port_add);
3358
3359
3360/**
3361 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
3362 * @rport: The remote port that no longer exists
3363 *
3364 * The LLDD calls this routine to notify the transport that a remote
3365 * port is no longer part of the topology. Note: Although a port
3366 * may no longer be part of the topology, it may persist in the remote
3367 * ports displayed by the fc_host. We do this under 2 conditions:
3368 *
3369 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
3370 * This allows the port to temporarily disappear, then reappear without
3371 * disrupting the SCSI device tree attached to it. During the "blocked"
3372 * period the port will still exist.
3373 *
3374 * 2) If the port was a scsi target and disappears for longer than we
3375 * expect, we'll delete the port and the tear down the SCSI device tree
3376 * attached to it. However, we want to semi-persist the target id assigned
3377 * to that port if it eventually does exist. The port structure will
3378 * remain (although with minimal information) so that the target id
3379 * bindings also remain.
3380 *
3381 * If the remote port is not an FCP Target, it will be fully torn down
3382 * and deallocated, including the fc_remote_port class device.
3383 *
3384 * If the remote port is an FCP Target, the port will be placed in a
3385 * temporary blocked state. From the LLDD's perspective, the rport no
3386 * longer exists. From the SCSI midlayer's perspective, the SCSI target
3387 * exists, but all sdevs on it are blocked from further I/O. The following
3388 * is then expected.
3389 *
3390 * If the remote port does not return (signaled by a LLDD call to
3391 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
3392 * scsi target is removed - killing all outstanding i/o and removing the
3393 * scsi devices attached to it. The port structure will be marked Not
3394 * Present and be partially cleared, leaving only enough information to
3395 * recognize the remote port relative to the scsi target id binding if
3396 * it later appears. The port will remain as long as there is a valid
3397 * binding (e.g. until the user changes the binding type or unloads the
3398 * scsi host with the binding).
3399 *
3400 * If the remote port returns within the dev_loss_tmo value (and matches
3401 * according to the target id binding type), the port structure will be
3402 * reused. If it is no longer a SCSI target, the target will be torn
3403 * down. If it continues to be a SCSI target, then the target will be
3404 * unblocked (allowing i/o to be resumed), and a scan will be activated
3405 * to ensure that all luns are detected.
3406 *
3407 * Called from normal process context only - cannot be called from interrupt.
3408 *
3409 * Notes:
3410 * This routine assumes no locks are held on entry.
3411 */
3412void
3413fc_remote_port_delete(struct fc_rport *rport)
3414{
3415 struct Scsi_Host *shost = rport_to_shost(rport);
3416 unsigned long timeout = rport->dev_loss_tmo;
3417 unsigned long flags;
3418
3419 /*
3420 * No need to flush the fc_host work_q's, as all adds are synchronous.
3421 *
3422 * We do need to reclaim the rport scan work element, so eventually
3423 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
3424 * there's still a scan pending.
3425 */
3426
3427 spin_lock_irqsave(shost->host_lock, flags);
3428
3429 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
3430 (rport->port_state != FC_PORTSTATE_MARGINAL)) {
3431 spin_unlock_irqrestore(shost->host_lock, flags);
3432 return;
3433 }
3434
3435 /*
3436 * In the past, we if this was not an FCP-Target, we would
3437 * unconditionally just jump to deleting the rport.
3438 * However, rports can be used as node containers by the LLDD,
3439 * and its not appropriate to just terminate the rport at the
3440 * first sign of a loss in connectivity. The LLDD may want to
3441 * send ELS traffic to re-validate the login. If the rport is
3442 * immediately deleted, it makes it inappropriate for a node
3443 * container.
3444 * So... we now unconditionally wait dev_loss_tmo before
3445 * destroying an rport.
3446 */
3447
3448 rport->port_state = FC_PORTSTATE_BLOCKED;
3449
3450 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3451
3452 spin_unlock_irqrestore(shost->host_lock, flags);
3453
3454 scsi_block_targets(shost, &rport->dev);
3455
3456 /* see if we need to kill io faster than waiting for device loss */
3457 if ((rport->fast_io_fail_tmo != -1) &&
3458 (rport->fast_io_fail_tmo < timeout))
3459 fc_queue_devloss_work(shost, &rport->fail_io_work,
3460 rport->fast_io_fail_tmo * HZ);
3461
3462 /* cap the length the devices can be blocked until they are deleted */
3463 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3464}
3465EXPORT_SYMBOL(fc_remote_port_delete);
3466
3467/**
3468 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3469 * @rport: The remote port that changed.
3470 * @roles: New roles for this port.
3471 *
3472 * Description: The LLDD calls this routine to notify the transport that the
3473 * roles on a remote port may have changed. The largest effect of this is
3474 * if a port now becomes a FCP Target, it must be allocated a
3475 * scsi target id. If the port is no longer a FCP target, any
3476 * scsi target id value assigned to it will persist in case the
3477 * role changes back to include FCP Target. No changes in the scsi
3478 * midlayer will be invoked if the role changes (in the expectation
3479 * that the role will be resumed. If it doesn't normal error processing
3480 * will take place).
3481 *
3482 * Should not be called from interrupt context.
3483 *
3484 * Notes:
3485 * This routine assumes no locks are held on entry.
3486 */
3487void
3488fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3489{
3490 struct Scsi_Host *shost = rport_to_shost(rport);
3491 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3492 unsigned long flags;
3493 int create = 0;
3494
3495 spin_lock_irqsave(shost->host_lock, flags);
3496 if (roles & FC_PORT_ROLE_FCP_TARGET) {
3497 if (rport->scsi_target_id == -1) {
3498 rport->scsi_target_id = fc_host->next_target_id++;
3499 create = 1;
3500 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3501 create = 1;
3502 }
3503
3504 rport->roles = roles;
3505
3506 spin_unlock_irqrestore(shost->host_lock, flags);
3507
3508 if (create) {
3509 /*
3510 * There may have been a delete timer running on the
3511 * port. Ensure that it is cancelled as we now know
3512 * the port is an FCP Target.
3513 * Note: we know the rport exists and is in an online
3514 * state as the LLDD would not have had an rport
3515 * reference to pass us.
3516 *
3517 * Take no action on the del_timer failure as the state
3518 * machine state change will validate the
3519 * transaction.
3520 */
3521 if (!cancel_delayed_work(&rport->fail_io_work))
3522 fc_flush_devloss(shost);
3523 if (!cancel_delayed_work(&rport->dev_loss_work))
3524 fc_flush_devloss(shost);
3525
3526 spin_lock_irqsave(shost->host_lock, flags);
3527 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3528 FC_RPORT_DEVLOSS_PENDING |
3529 FC_RPORT_DEVLOSS_CALLBK_DONE);
3530 spin_unlock_irqrestore(shost->host_lock, flags);
3531
3532 /* ensure any stgt delete functions are done */
3533 fc_flush_work(shost);
3534
3535 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3536 /* initiate a scan of the target */
3537 spin_lock_irqsave(shost->host_lock, flags);
3538 rport->flags |= FC_RPORT_SCAN_PENDING;
3539 scsi_queue_work(shost, &rport->scan_work);
3540 spin_unlock_irqrestore(shost->host_lock, flags);
3541 }
3542}
3543EXPORT_SYMBOL(fc_remote_port_rolechg);
3544
3545/**
3546 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3547 * @work: rport target that failed to reappear in the allotted time.
3548 *
3549 * Description: An attempt to delete a remote port blocks, and if it fails
3550 * to return in the allotted time this gets called.
3551 */
3552static void
3553fc_timeout_deleted_rport(struct work_struct *work)
3554{
3555 struct fc_rport *rport =
3556 container_of(work, struct fc_rport, dev_loss_work.work);
3557 struct Scsi_Host *shost = rport_to_shost(rport);
3558 struct fc_internal *i = to_fc_internal(shost->transportt);
3559 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3560 unsigned long flags;
3561 int do_callback = 0;
3562
3563 spin_lock_irqsave(shost->host_lock, flags);
3564
3565 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3566
3567 /*
3568 * If the port is ONLINE, then it came back. If it was a SCSI
3569 * target, validate it still is. If not, tear down the
3570 * scsi_target on it.
3571 */
3572 if (((rport->port_state == FC_PORTSTATE_ONLINE) ||
3573 (rport->port_state == FC_PORTSTATE_MARGINAL)) &&
3574 (rport->scsi_target_id != -1) &&
3575 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3576 dev_printk(KERN_ERR, &rport->dev,
3577 "blocked FC remote port time out: no longer"
3578 " a FCP target, removing starget\n");
3579 spin_unlock_irqrestore(shost->host_lock, flags);
3580 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3581 fc_queue_work(shost, &rport->stgt_delete_work);
3582 return;
3583 }
3584
3585 /* NOOP state - we're flushing workq's */
3586 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3587 spin_unlock_irqrestore(shost->host_lock, flags);
3588 dev_printk(KERN_ERR, &rport->dev,
3589 "blocked FC remote port time out: leaving"
3590 " rport%s alone\n",
3591 (rport->scsi_target_id != -1) ? " and starget" : "");
3592 return;
3593 }
3594
3595 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3596 (rport->scsi_target_id == -1)) {
3597 list_del(&rport->peers);
3598 rport->port_state = FC_PORTSTATE_DELETED;
3599 dev_printk(KERN_ERR, &rport->dev,
3600 "blocked FC remote port time out: removing"
3601 " rport%s\n",
3602 (rport->scsi_target_id != -1) ? " and starget" : "");
3603 fc_queue_work(shost, &rport->rport_delete_work);
3604 spin_unlock_irqrestore(shost->host_lock, flags);
3605 return;
3606 }
3607
3608 dev_printk(KERN_ERR, &rport->dev,
3609 "blocked FC remote port time out: removing target and "
3610 "saving binding\n");
3611
3612 list_move_tail(&rport->peers, &fc_host->rport_bindings);
3613
3614 /*
3615 * Note: We do not remove or clear the hostdata area. This allows
3616 * host-specific target data to persist along with the
3617 * scsi_target_id. It's up to the host to manage it's hostdata area.
3618 */
3619
3620 /*
3621 * Reinitialize port attributes that may change if the port comes back.
3622 */
3623 rport->maxframe_size = -1;
3624 rport->supported_classes = FC_COS_UNSPECIFIED;
3625 rport->roles = FC_PORT_ROLE_UNKNOWN;
3626 rport->port_state = FC_PORTSTATE_NOTPRESENT;
3627 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3628
3629 /*
3630 * Pre-emptively kill I/O rather than waiting for the work queue
3631 * item to teardown the starget. (FCOE libFC folks prefer this
3632 * and to have the rport_port_id still set when it's done).
3633 */
3634 spin_unlock_irqrestore(shost->host_lock, flags);
3635 fc_terminate_rport_io(rport);
3636
3637 spin_lock_irqsave(shost->host_lock, flags);
3638
3639 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3640
3641 /* remove the identifiers that aren't used in the consisting binding */
3642 switch (fc_host->tgtid_bind_type) {
3643 case FC_TGTID_BIND_BY_WWPN:
3644 rport->node_name = -1;
3645 rport->port_id = -1;
3646 break;
3647 case FC_TGTID_BIND_BY_WWNN:
3648 rport->port_name = -1;
3649 rport->port_id = -1;
3650 break;
3651 case FC_TGTID_BIND_BY_ID:
3652 rport->node_name = -1;
3653 rport->port_name = -1;
3654 break;
3655 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3656 break;
3657 }
3658
3659 /*
3660 * As this only occurs if the remote port (scsi target)
3661 * went away and didn't come back - we'll remove
3662 * all attached scsi devices.
3663 */
3664 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3665 fc_queue_work(shost, &rport->stgt_delete_work);
3666
3667 do_callback = 1;
3668 }
3669
3670 spin_unlock_irqrestore(shost->host_lock, flags);
3671
3672 /*
3673 * Notify the driver that the rport is now dead. The LLDD will
3674 * also guarantee that any communication to the rport is terminated
3675 *
3676 * Note: we set the CALLBK_DONE flag above to correspond
3677 */
3678 if (do_callback && i->f->dev_loss_tmo_callbk)
3679 i->f->dev_loss_tmo_callbk(rport);
3680}
3681
3682
3683/**
3684 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3685 * @work: rport to terminate io on.
3686 *
3687 * Notes: Only requests the failure of the io, not that all are flushed
3688 * prior to returning.
3689 */
3690static void
3691fc_timeout_fail_rport_io(struct work_struct *work)
3692{
3693 struct fc_rport *rport =
3694 container_of(work, struct fc_rport, fail_io_work.work);
3695
3696 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3697 return;
3698
3699 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3700 fc_terminate_rport_io(rport);
3701}
3702
3703/**
3704 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3705 * @work: remote port to be scanned.
3706 */
3707static void
3708fc_scsi_scan_rport(struct work_struct *work)
3709{
3710 struct fc_rport *rport =
3711 container_of(work, struct fc_rport, scan_work);
3712 struct Scsi_Host *shost = rport_to_shost(rport);
3713 struct fc_internal *i = to_fc_internal(shost->transportt);
3714 unsigned long flags;
3715
3716 if (((rport->port_state == FC_PORTSTATE_ONLINE) ||
3717 (rport->port_state == FC_PORTSTATE_MARGINAL)) &&
3718 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3719 !(i->f->disable_target_scan)) {
3720 scsi_scan_target(&rport->dev, rport->channel,
3721 rport->scsi_target_id, SCAN_WILD_CARD,
3722 SCSI_SCAN_RESCAN);
3723 }
3724
3725 spin_lock_irqsave(shost->host_lock, flags);
3726 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3727 spin_unlock_irqrestore(shost->host_lock, flags);
3728}
3729
3730/**
3731 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
3732 * @rport: Remote port that scsi_eh is trying to recover.
3733 *
3734 * This routine can be called from a FC LLD scsi_eh callback. It
3735 * blocks the scsi_eh thread until the fc_rport leaves the
3736 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3737 * necessary to avoid the scsi_eh failing recovery actions for blocked
3738 * rports which would lead to offlined SCSI devices.
3739 *
3740 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3741 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3742 * passed back to scsi_eh.
3743 */
3744int fc_block_rport(struct fc_rport *rport)
3745{
3746 struct Scsi_Host *shost = rport_to_shost(rport);
3747 unsigned long flags;
3748
3749 spin_lock_irqsave(shost->host_lock, flags);
3750 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3751 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3752 spin_unlock_irqrestore(shost->host_lock, flags);
3753 msleep(1000);
3754 spin_lock_irqsave(shost->host_lock, flags);
3755 }
3756 spin_unlock_irqrestore(shost->host_lock, flags);
3757
3758 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3759 return FAST_IO_FAIL;
3760
3761 return 0;
3762}
3763EXPORT_SYMBOL(fc_block_rport);
3764
3765/**
3766 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3767 * @cmnd: SCSI command that scsi_eh is trying to recover
3768 *
3769 * This routine can be called from a FC LLD scsi_eh callback. It
3770 * blocks the scsi_eh thread until the fc_rport leaves the
3771 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3772 * necessary to avoid the scsi_eh failing recovery actions for blocked
3773 * rports which would lead to offlined SCSI devices.
3774 *
3775 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3776 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3777 * passed back to scsi_eh.
3778 */
3779int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3780{
3781 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3782
3783 if (WARN_ON_ONCE(!rport))
3784 return FAST_IO_FAIL;
3785
3786 return fc_block_rport(rport);
3787}
3788EXPORT_SYMBOL(fc_block_scsi_eh);
3789
3790/*
3791 * fc_eh_should_retry_cmd - Checks if the cmd should be retried or not
3792 * @scmd: The SCSI command to be checked
3793 *
3794 * This checks the rport state to decide if a cmd is
3795 * retryable.
3796 *
3797 * Returns: true if the rport state is not in marginal state.
3798 */
3799bool fc_eh_should_retry_cmd(struct scsi_cmnd *scmd)
3800{
3801 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
3802
3803 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
3804 (scsi_cmd_to_rq(scmd)->cmd_flags & REQ_FAILFAST_TRANSPORT)) {
3805 set_host_byte(scmd, DID_TRANSPORT_MARGINAL);
3806 return false;
3807 }
3808 return true;
3809}
3810EXPORT_SYMBOL_GPL(fc_eh_should_retry_cmd);
3811
3812/**
3813 * fc_vport_setup - allocates and creates a FC virtual port.
3814 * @shost: scsi host the virtual port is connected to.
3815 * @channel: Channel on shost port connected to.
3816 * @pdev: parent device for vport
3817 * @ids: The world wide names, FC4 port roles, etc for
3818 * the virtual port.
3819 * @ret_vport: The pointer to the created vport.
3820 *
3821 * Allocates and creates the vport structure, calls the parent host
3822 * to instantiate the vport, this completes w/ class and sysfs creation.
3823 *
3824 * Notes:
3825 * This routine assumes no locks are held on entry.
3826 */
3827static int
3828fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3829 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3830{
3831 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3832 struct fc_internal *fci = to_fc_internal(shost->transportt);
3833 struct fc_vport *vport;
3834 struct device *dev;
3835 unsigned long flags;
3836 size_t size;
3837 int error;
3838
3839 *ret_vport = NULL;
3840
3841 if ( ! fci->f->vport_create)
3842 return -ENOENT;
3843
3844 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3845 vport = kzalloc(size, GFP_KERNEL);
3846 if (unlikely(!vport)) {
3847 printk(KERN_ERR "%s: allocation failure\n", __func__);
3848 return -ENOMEM;
3849 }
3850
3851 vport->vport_state = FC_VPORT_UNKNOWN;
3852 vport->vport_last_state = FC_VPORT_UNKNOWN;
3853 vport->node_name = ids->node_name;
3854 vport->port_name = ids->port_name;
3855 vport->roles = ids->roles;
3856 vport->vport_type = ids->vport_type;
3857 if (fci->f->dd_fcvport_size)
3858 vport->dd_data = &vport[1];
3859 vport->shost = shost;
3860 vport->channel = channel;
3861 vport->flags = FC_VPORT_CREATING;
3862 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3863
3864 spin_lock_irqsave(shost->host_lock, flags);
3865
3866 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3867 spin_unlock_irqrestore(shost->host_lock, flags);
3868 kfree(vport);
3869 return -ENOSPC;
3870 }
3871 fc_host->npiv_vports_inuse++;
3872 vport->number = fc_host->next_vport_number++;
3873 list_add_tail(&vport->peers, &fc_host->vports);
3874 scsi_host_get(shost); /* for fc_host->vport list */
3875
3876 spin_unlock_irqrestore(shost->host_lock, flags);
3877
3878 dev = &vport->dev;
3879 device_initialize(dev); /* takes self reference */
3880 dev->parent = get_device(pdev); /* takes parent reference */
3881 dev->release = fc_vport_dev_release;
3882 dev_set_name(dev, "vport-%d:%d-%d",
3883 shost->host_no, channel, vport->number);
3884 transport_setup_device(dev);
3885
3886 error = device_add(dev);
3887 if (error) {
3888 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3889 goto delete_vport;
3890 }
3891 transport_add_device(dev);
3892 transport_configure_device(dev);
3893
3894 error = fci->f->vport_create(vport, ids->disable);
3895 if (error) {
3896 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3897 goto delete_vport_all;
3898 }
3899
3900 /*
3901 * if the parent isn't the physical adapter's Scsi_Host, ensure
3902 * the Scsi_Host at least contains a symlink to the vport.
3903 */
3904 if (pdev != &shost->shost_gendev) {
3905 error = sysfs_create_link(&shost->shost_gendev.kobj,
3906 &dev->kobj, dev_name(dev));
3907 if (error)
3908 printk(KERN_ERR
3909 "%s: Cannot create vport symlinks for "
3910 "%s, err=%d\n",
3911 __func__, dev_name(dev), error);
3912 }
3913 spin_lock_irqsave(shost->host_lock, flags);
3914 vport->flags &= ~FC_VPORT_CREATING;
3915 spin_unlock_irqrestore(shost->host_lock, flags);
3916
3917 dev_printk(KERN_NOTICE, pdev,
3918 "%s created via shost%d channel %d\n", dev_name(dev),
3919 shost->host_no, channel);
3920
3921 *ret_vport = vport;
3922
3923 return 0;
3924
3925delete_vport_all:
3926 transport_remove_device(dev);
3927 device_del(dev);
3928delete_vport:
3929 transport_destroy_device(dev);
3930 spin_lock_irqsave(shost->host_lock, flags);
3931 list_del(&vport->peers);
3932 scsi_host_put(shost); /* for fc_host->vport list */
3933 fc_host->npiv_vports_inuse--;
3934 spin_unlock_irqrestore(shost->host_lock, flags);
3935 put_device(dev->parent);
3936 kfree(vport);
3937
3938 return error;
3939}
3940
3941/**
3942 * fc_vport_create - Admin App or LLDD requests creation of a vport
3943 * @shost: scsi host the virtual port is connected to.
3944 * @channel: channel on shost port connected to.
3945 * @ids: The world wide names, FC4 port roles, etc for
3946 * the virtual port.
3947 *
3948 * Notes:
3949 * This routine assumes no locks are held on entry.
3950 */
3951struct fc_vport *
3952fc_vport_create(struct Scsi_Host *shost, int channel,
3953 struct fc_vport_identifiers *ids)
3954{
3955 int stat;
3956 struct fc_vport *vport;
3957
3958 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3959 ids, &vport);
3960 return stat ? NULL : vport;
3961}
3962EXPORT_SYMBOL(fc_vport_create);
3963
3964/**
3965 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3966 * @vport: fc_vport to be terminated
3967 *
3968 * Calls the LLDD vport_delete() function, then deallocates and removes
3969 * the vport from the shost and object tree.
3970 *
3971 * Notes:
3972 * This routine assumes no locks are held on entry.
3973 */
3974int
3975fc_vport_terminate(struct fc_vport *vport)
3976{
3977 struct Scsi_Host *shost = vport_to_shost(vport);
3978 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3979 struct fc_internal *i = to_fc_internal(shost->transportt);
3980 struct device *dev = &vport->dev;
3981 unsigned long flags;
3982 int stat;
3983
3984 if (i->f->vport_delete)
3985 stat = i->f->vport_delete(vport);
3986 else
3987 stat = -ENOENT;
3988
3989 spin_lock_irqsave(shost->host_lock, flags);
3990 vport->flags &= ~FC_VPORT_DELETING;
3991 if (!stat) {
3992 vport->flags |= FC_VPORT_DELETED;
3993 list_del(&vport->peers);
3994 fc_host->npiv_vports_inuse--;
3995 scsi_host_put(shost); /* for fc_host->vport list */
3996 }
3997 spin_unlock_irqrestore(shost->host_lock, flags);
3998
3999 if (stat)
4000 return stat;
4001
4002 if (dev->parent != &shost->shost_gendev)
4003 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
4004 transport_remove_device(dev);
4005 device_del(dev);
4006 transport_destroy_device(dev);
4007
4008 /*
4009 * Removing our self-reference should mean our
4010 * release function gets called, which will drop the remaining
4011 * parent reference and free the data structure.
4012 */
4013 put_device(dev); /* for self-reference */
4014
4015 return 0; /* SUCCESS */
4016}
4017EXPORT_SYMBOL(fc_vport_terminate);
4018
4019/**
4020 * fc_vport_sched_delete - workq-based delete request for a vport
4021 * @work: vport to be deleted.
4022 */
4023static void
4024fc_vport_sched_delete(struct work_struct *work)
4025{
4026 struct fc_vport *vport =
4027 container_of(work, struct fc_vport, vport_delete_work);
4028 int stat;
4029
4030 stat = fc_vport_terminate(vport);
4031 if (stat)
4032 dev_printk(KERN_ERR, vport->dev.parent,
4033 "%s: %s could not be deleted created via "
4034 "shost%d channel %d - error %d\n", __func__,
4035 dev_name(&vport->dev), vport->shost->host_no,
4036 vport->channel, stat);
4037}
4038
4039
4040/*
4041 * BSG support
4042 */
4043
4044/**
4045 * fc_bsg_job_timeout - handler for when a bsg request timesout
4046 * @req: request that timed out
4047 */
4048static enum blk_eh_timer_return
4049fc_bsg_job_timeout(struct request *req)
4050{
4051 struct bsg_job *job = blk_mq_rq_to_pdu(req);
4052 struct Scsi_Host *shost = fc_bsg_to_shost(job);
4053 struct fc_rport *rport = fc_bsg_to_rport(job);
4054 struct fc_internal *i = to_fc_internal(shost->transportt);
4055 int err = 0, inflight = 0;
4056
4057 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
4058 return BLK_EH_RESET_TIMER;
4059
4060 inflight = bsg_job_get(job);
4061
4062 if (inflight && i->f->bsg_timeout) {
4063 /* call LLDD to abort the i/o as it has timed out */
4064 err = i->f->bsg_timeout(job);
4065 if (err == -EAGAIN) {
4066 bsg_job_put(job);
4067 return BLK_EH_RESET_TIMER;
4068 } else if (err)
4069 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
4070 "abort failed with status %d\n", err);
4071 }
4072
4073 /* the blk_end_sync_io() doesn't check the error */
4074 if (inflight)
4075 blk_mq_end_request(req, BLK_STS_IOERR);
4076 return BLK_EH_DONE;
4077}
4078
4079/**
4080 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
4081 * @shost: scsi host rport attached to
4082 * @job: bsg job to be processed
4083 */
4084static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
4085{
4086 struct fc_internal *i = to_fc_internal(shost->transportt);
4087 struct fc_bsg_request *bsg_request = job->request;
4088 struct fc_bsg_reply *bsg_reply = job->reply;
4089 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
4090 int ret;
4091
4092 /* check if we really have all the request data needed */
4093 if (job->request_len < cmdlen) {
4094 ret = -ENOMSG;
4095 goto fail_host_msg;
4096 }
4097
4098 /* Validate the host command */
4099 switch (bsg_request->msgcode) {
4100 case FC_BSG_HST_ADD_RPORT:
4101 cmdlen += sizeof(struct fc_bsg_host_add_rport);
4102 break;
4103
4104 case FC_BSG_HST_DEL_RPORT:
4105 cmdlen += sizeof(struct fc_bsg_host_del_rport);
4106 break;
4107
4108 case FC_BSG_HST_ELS_NOLOGIN:
4109 cmdlen += sizeof(struct fc_bsg_host_els);
4110 /* there better be a xmt and rcv payloads */
4111 if ((!job->request_payload.payload_len) ||
4112 (!job->reply_payload.payload_len)) {
4113 ret = -EINVAL;
4114 goto fail_host_msg;
4115 }
4116 break;
4117
4118 case FC_BSG_HST_CT:
4119 cmdlen += sizeof(struct fc_bsg_host_ct);
4120 /* there better be xmt and rcv payloads */
4121 if ((!job->request_payload.payload_len) ||
4122 (!job->reply_payload.payload_len)) {
4123 ret = -EINVAL;
4124 goto fail_host_msg;
4125 }
4126 break;
4127
4128 case FC_BSG_HST_VENDOR:
4129 cmdlen += sizeof(struct fc_bsg_host_vendor);
4130 if ((shost->hostt->vendor_id == 0L) ||
4131 (bsg_request->rqst_data.h_vendor.vendor_id !=
4132 shost->hostt->vendor_id)) {
4133 ret = -ESRCH;
4134 goto fail_host_msg;
4135 }
4136 break;
4137
4138 default:
4139 ret = -EBADR;
4140 goto fail_host_msg;
4141 }
4142
4143 ret = i->f->bsg_request(job);
4144 if (!ret)
4145 return 0;
4146
4147fail_host_msg:
4148 /* return the errno failure code as the only status */
4149 BUG_ON(job->reply_len < sizeof(uint32_t));
4150 bsg_reply->reply_payload_rcv_len = 0;
4151 bsg_reply->result = ret;
4152 job->reply_len = sizeof(uint32_t);
4153 bsg_job_done(job, bsg_reply->result,
4154 bsg_reply->reply_payload_rcv_len);
4155 return 0;
4156}
4157
4158
4159/*
4160 * fc_bsg_goose_queue - restart rport queue in case it was stopped
4161 * @rport: rport to be restarted
4162 */
4163static void
4164fc_bsg_goose_queue(struct fc_rport *rport)
4165{
4166 struct request_queue *q = rport->rqst_q;
4167
4168 if (q)
4169 blk_mq_run_hw_queues(q, true);
4170}
4171
4172/**
4173 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
4174 * @shost: scsi host rport attached to
4175 * @job: bsg job to be processed
4176 */
4177static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
4178{
4179 struct fc_internal *i = to_fc_internal(shost->transportt);
4180 struct fc_bsg_request *bsg_request = job->request;
4181 struct fc_bsg_reply *bsg_reply = job->reply;
4182 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
4183 int ret;
4184
4185 /* check if we really have all the request data needed */
4186 if (job->request_len < cmdlen) {
4187 ret = -ENOMSG;
4188 goto fail_rport_msg;
4189 }
4190
4191 /* Validate the rport command */
4192 switch (bsg_request->msgcode) {
4193 case FC_BSG_RPT_ELS:
4194 cmdlen += sizeof(struct fc_bsg_rport_els);
4195 goto check_bidi;
4196
4197 case FC_BSG_RPT_CT:
4198 cmdlen += sizeof(struct fc_bsg_rport_ct);
4199check_bidi:
4200 /* there better be xmt and rcv payloads */
4201 if ((!job->request_payload.payload_len) ||
4202 (!job->reply_payload.payload_len)) {
4203 ret = -EINVAL;
4204 goto fail_rport_msg;
4205 }
4206 break;
4207 default:
4208 ret = -EBADR;
4209 goto fail_rport_msg;
4210 }
4211
4212 ret = i->f->bsg_request(job);
4213 if (!ret)
4214 return 0;
4215
4216fail_rport_msg:
4217 /* return the errno failure code as the only status */
4218 BUG_ON(job->reply_len < sizeof(uint32_t));
4219 bsg_reply->reply_payload_rcv_len = 0;
4220 bsg_reply->result = ret;
4221 job->reply_len = sizeof(uint32_t);
4222 bsg_job_done(job, bsg_reply->result,
4223 bsg_reply->reply_payload_rcv_len);
4224 return 0;
4225}
4226
4227static int fc_bsg_dispatch(struct bsg_job *job)
4228{
4229 struct Scsi_Host *shost = fc_bsg_to_shost(job);
4230
4231 if (scsi_is_fc_rport(job->dev))
4232 return fc_bsg_rport_dispatch(shost, job);
4233 else
4234 return fc_bsg_host_dispatch(shost, job);
4235}
4236
4237static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport)
4238{
4239 if (rport->port_state == FC_PORTSTATE_BLOCKED &&
4240 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
4241 return BLK_STS_RESOURCE;
4242
4243 if ((rport->port_state != FC_PORTSTATE_ONLINE) &&
4244 (rport->port_state != FC_PORTSTATE_MARGINAL))
4245 return BLK_STS_IOERR;
4246
4247 return BLK_STS_OK;
4248}
4249
4250
4251static int fc_bsg_dispatch_prep(struct bsg_job *job)
4252{
4253 struct fc_rport *rport = fc_bsg_to_rport(job);
4254 blk_status_t ret;
4255
4256 ret = fc_bsg_rport_prep(rport);
4257 switch (ret) {
4258 case BLK_STS_OK:
4259 break;
4260 case BLK_STS_RESOURCE:
4261 return -EAGAIN;
4262 default:
4263 return -EIO;
4264 }
4265
4266 return fc_bsg_dispatch(job);
4267}
4268
4269/**
4270 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4271 * @shost: shost for fc_host
4272 * @fc_host: fc_host adding the structures to
4273 */
4274static int
4275fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4276{
4277 struct device *dev = &shost->shost_gendev;
4278 struct fc_internal *i = to_fc_internal(shost->transportt);
4279 struct request_queue *q;
4280 char bsg_name[20];
4281
4282 fc_host->rqst_q = NULL;
4283
4284 if (!i->f->bsg_request)
4285 return -ENOTSUPP;
4286
4287 snprintf(bsg_name, sizeof(bsg_name),
4288 "fc_host%d", shost->host_no);
4289
4290 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout,
4291 i->f->dd_bsg_size);
4292 if (IS_ERR(q)) {
4293 dev_err(dev,
4294 "fc_host%d: bsg interface failed to initialize - setup queue\n",
4295 shost->host_no);
4296 return PTR_ERR(q);
4297 }
4298 __scsi_init_queue(shost, q);
4299 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4300 fc_host->rqst_q = q;
4301 return 0;
4302}
4303
4304/**
4305 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4306 * @shost: shost that rport is attached to
4307 * @rport: rport that the bsg hooks are being attached to
4308 */
4309static int
4310fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4311{
4312 struct device *dev = &rport->dev;
4313 struct fc_internal *i = to_fc_internal(shost->transportt);
4314 struct request_queue *q;
4315
4316 rport->rqst_q = NULL;
4317
4318 if (!i->f->bsg_request)
4319 return -ENOTSUPP;
4320
4321 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep,
4322 fc_bsg_job_timeout, i->f->dd_bsg_size);
4323 if (IS_ERR(q)) {
4324 dev_err(dev, "failed to setup bsg queue\n");
4325 return PTR_ERR(q);
4326 }
4327 __scsi_init_queue(shost, q);
4328 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4329 rport->rqst_q = q;
4330 return 0;
4331}
4332
4333
4334/**
4335 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4336 * @q: the request_queue that is to be torn down.
4337 *
4338 * Notes:
4339 * Before unregistering the queue empty any requests that are blocked
4340 *
4341 *
4342 */
4343static void
4344fc_bsg_remove(struct request_queue *q)
4345{
4346 bsg_remove_queue(q);
4347}
4348
4349
4350/* Original Author: Martin Hicks */
4351MODULE_AUTHOR("James Smart");
4352MODULE_DESCRIPTION("FC Transport Attributes");
4353MODULE_LICENSE("GPL");
4354
4355module_init(fc_transport_init);
4356module_exit(fc_transport_exit);
1/*
2 * FiberChannel transport specific attributes exported to sysfs.
3 *
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * ========
21 *
22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
25 * Add vports, etc
26 *
27 */
28#include <linux/module.h>
29#include <linux/init.h>
30#include <linux/slab.h>
31#include <linux/delay.h>
32#include <linux/kernel.h>
33#include <scsi/scsi_device.h>
34#include <scsi/scsi_host.h>
35#include <scsi/scsi_transport.h>
36#include <scsi/scsi_transport_fc.h>
37#include <scsi/scsi_cmnd.h>
38#include <linux/netlink.h>
39#include <net/netlink.h>
40#include <scsi/scsi_netlink_fc.h>
41#include <scsi/scsi_bsg_fc.h>
42#include "scsi_priv.h"
43#include "scsi_transport_fc_internal.h"
44
45static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
46static void fc_vport_sched_delete(struct work_struct *work);
47static int fc_vport_setup(struct Scsi_Host *shost, int channel,
48 struct device *pdev, struct fc_vport_identifiers *ids,
49 struct fc_vport **vport);
50static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
51static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
52static void fc_bsg_remove(struct request_queue *);
53static void fc_bsg_goose_queue(struct fc_rport *);
54
55/*
56 * Module Parameters
57 */
58
59/*
60 * dev_loss_tmo: the default number of seconds that the FC transport
61 * should insulate the loss of a remote port.
62 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
63 */
64static unsigned int fc_dev_loss_tmo = 60; /* seconds */
65
66module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
67MODULE_PARM_DESC(dev_loss_tmo,
68 "Maximum number of seconds that the FC transport should"
69 " insulate the loss of a remote port. Once this value is"
70 " exceeded, the scsi target is removed. Value should be"
71 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
72 " fast_io_fail_tmo is not set.");
73
74/*
75 * Redefine so that we can have same named attributes in the
76 * sdev/starget/host objects.
77 */
78#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
79struct device_attribute device_attr_##_prefix##_##_name = \
80 __ATTR(_name,_mode,_show,_store)
81
82#define fc_enum_name_search(title, table_type, table) \
83static const char *get_fc_##title##_name(enum table_type table_key) \
84{ \
85 int i; \
86 char *name = NULL; \
87 \
88 for (i = 0; i < ARRAY_SIZE(table); i++) { \
89 if (table[i].value == table_key) { \
90 name = table[i].name; \
91 break; \
92 } \
93 } \
94 return name; \
95}
96
97#define fc_enum_name_match(title, table_type, table) \
98static int get_fc_##title##_match(const char *table_key, \
99 enum table_type *value) \
100{ \
101 int i; \
102 \
103 for (i = 0; i < ARRAY_SIZE(table); i++) { \
104 if (strncmp(table_key, table[i].name, \
105 table[i].matchlen) == 0) { \
106 *value = table[i].value; \
107 return 0; /* success */ \
108 } \
109 } \
110 return 1; /* failure */ \
111}
112
113
114/* Convert fc_port_type values to ascii string name */
115static struct {
116 enum fc_port_type value;
117 char *name;
118} fc_port_type_names[] = {
119 { FC_PORTTYPE_UNKNOWN, "Unknown" },
120 { FC_PORTTYPE_OTHER, "Other" },
121 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
122 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
123 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
124 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
125 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
126 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
127};
128fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
129#define FC_PORTTYPE_MAX_NAMELEN 50
130
131/* Reuse fc_port_type enum function for vport_type */
132#define get_fc_vport_type_name get_fc_port_type_name
133
134
135/* Convert fc_host_event_code values to ascii string name */
136static const struct {
137 enum fc_host_event_code value;
138 char *name;
139} fc_host_event_code_names[] = {
140 { FCH_EVT_LIP, "lip" },
141 { FCH_EVT_LINKUP, "link_up" },
142 { FCH_EVT_LINKDOWN, "link_down" },
143 { FCH_EVT_LIPRESET, "lip_reset" },
144 { FCH_EVT_RSCN, "rscn" },
145 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
146 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
147 { FCH_EVT_PORT_ONLINE, "port_online" },
148 { FCH_EVT_PORT_OFFLINE, "port_offline" },
149 { FCH_EVT_PORT_FABRIC, "port_fabric" },
150 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
151 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
152};
153fc_enum_name_search(host_event_code, fc_host_event_code,
154 fc_host_event_code_names)
155#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
156
157
158/* Convert fc_port_state values to ascii string name */
159static struct {
160 enum fc_port_state value;
161 char *name;
162} fc_port_state_names[] = {
163 { FC_PORTSTATE_UNKNOWN, "Unknown" },
164 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
165 { FC_PORTSTATE_ONLINE, "Online" },
166 { FC_PORTSTATE_OFFLINE, "Offline" },
167 { FC_PORTSTATE_BLOCKED, "Blocked" },
168 { FC_PORTSTATE_BYPASSED, "Bypassed" },
169 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
170 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
171 { FC_PORTSTATE_ERROR, "Error" },
172 { FC_PORTSTATE_LOOPBACK, "Loopback" },
173 { FC_PORTSTATE_DELETED, "Deleted" },
174};
175fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
176#define FC_PORTSTATE_MAX_NAMELEN 20
177
178
179/* Convert fc_vport_state values to ascii string name */
180static struct {
181 enum fc_vport_state value;
182 char *name;
183} fc_vport_state_names[] = {
184 { FC_VPORT_UNKNOWN, "Unknown" },
185 { FC_VPORT_ACTIVE, "Active" },
186 { FC_VPORT_DISABLED, "Disabled" },
187 { FC_VPORT_LINKDOWN, "Linkdown" },
188 { FC_VPORT_INITIALIZING, "Initializing" },
189 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
190 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
191 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
192 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
193 { FC_VPORT_FAILED, "VPort Failed" },
194};
195fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
196#define FC_VPORTSTATE_MAX_NAMELEN 24
197
198/* Reuse fc_vport_state enum function for vport_last_state */
199#define get_fc_vport_last_state_name get_fc_vport_state_name
200
201
202/* Convert fc_tgtid_binding_type values to ascii string name */
203static const struct {
204 enum fc_tgtid_binding_type value;
205 char *name;
206 int matchlen;
207} fc_tgtid_binding_type_names[] = {
208 { FC_TGTID_BIND_NONE, "none", 4 },
209 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
210 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
211 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
212};
213fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
214 fc_tgtid_binding_type_names)
215fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
216 fc_tgtid_binding_type_names)
217#define FC_BINDTYPE_MAX_NAMELEN 30
218
219
220#define fc_bitfield_name_search(title, table) \
221static ssize_t \
222get_fc_##title##_names(u32 table_key, char *buf) \
223{ \
224 char *prefix = ""; \
225 ssize_t len = 0; \
226 int i; \
227 \
228 for (i = 0; i < ARRAY_SIZE(table); i++) { \
229 if (table[i].value & table_key) { \
230 len += sprintf(buf + len, "%s%s", \
231 prefix, table[i].name); \
232 prefix = ", "; \
233 } \
234 } \
235 len += sprintf(buf + len, "\n"); \
236 return len; \
237}
238
239
240/* Convert FC_COS bit values to ascii string name */
241static const struct {
242 u32 value;
243 char *name;
244} fc_cos_names[] = {
245 { FC_COS_CLASS1, "Class 1" },
246 { FC_COS_CLASS2, "Class 2" },
247 { FC_COS_CLASS3, "Class 3" },
248 { FC_COS_CLASS4, "Class 4" },
249 { FC_COS_CLASS6, "Class 6" },
250};
251fc_bitfield_name_search(cos, fc_cos_names)
252
253
254/* Convert FC_PORTSPEED bit values to ascii string name */
255static const struct {
256 u32 value;
257 char *name;
258} fc_port_speed_names[] = {
259 { FC_PORTSPEED_1GBIT, "1 Gbit" },
260 { FC_PORTSPEED_2GBIT, "2 Gbit" },
261 { FC_PORTSPEED_4GBIT, "4 Gbit" },
262 { FC_PORTSPEED_10GBIT, "10 Gbit" },
263 { FC_PORTSPEED_8GBIT, "8 Gbit" },
264 { FC_PORTSPEED_16GBIT, "16 Gbit" },
265 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
266};
267fc_bitfield_name_search(port_speed, fc_port_speed_names)
268
269
270static int
271show_fc_fc4s (char *buf, u8 *fc4_list)
272{
273 int i, len=0;
274
275 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
276 len += sprintf(buf + len , "0x%02x ", *fc4_list);
277 len += sprintf(buf + len, "\n");
278 return len;
279}
280
281
282/* Convert FC_PORT_ROLE bit values to ascii string name */
283static const struct {
284 u32 value;
285 char *name;
286} fc_port_role_names[] = {
287 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
288 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
289 { FC_PORT_ROLE_IP_PORT, "IP Port" },
290};
291fc_bitfield_name_search(port_roles, fc_port_role_names)
292
293/*
294 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
295 */
296#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
297#define FC_WELLKNOWN_ROLE_MASK 0x00000f
298#define FC_FPORT_PORTID 0x00000e
299#define FC_FABCTLR_PORTID 0x00000d
300#define FC_DIRSRVR_PORTID 0x00000c
301#define FC_TIMESRVR_PORTID 0x00000b
302#define FC_MGMTSRVR_PORTID 0x00000a
303
304
305static void fc_timeout_deleted_rport(struct work_struct *work);
306static void fc_timeout_fail_rport_io(struct work_struct *work);
307static void fc_scsi_scan_rport(struct work_struct *work);
308
309/*
310 * Attribute counts pre object type...
311 * Increase these values if you add attributes
312 */
313#define FC_STARGET_NUM_ATTRS 3
314#define FC_RPORT_NUM_ATTRS 10
315#define FC_VPORT_NUM_ATTRS 9
316#define FC_HOST_NUM_ATTRS 22
317
318struct fc_internal {
319 struct scsi_transport_template t;
320 struct fc_function_template *f;
321
322 /*
323 * For attributes : each object has :
324 * An array of the actual attributes structures
325 * An array of null-terminated pointers to the attribute
326 * structures - used for mid-layer interaction.
327 *
328 * The attribute containers for the starget and host are are
329 * part of the midlayer. As the remote port is specific to the
330 * fc transport, we must provide the attribute container.
331 */
332 struct device_attribute private_starget_attrs[
333 FC_STARGET_NUM_ATTRS];
334 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
335
336 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
337 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
338
339 struct transport_container rport_attr_cont;
340 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
341 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
342
343 struct transport_container vport_attr_cont;
344 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
345 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
346};
347
348#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
349
350static int fc_target_setup(struct transport_container *tc, struct device *dev,
351 struct device *cdev)
352{
353 struct scsi_target *starget = to_scsi_target(dev);
354 struct fc_rport *rport = starget_to_rport(starget);
355
356 /*
357 * if parent is remote port, use values from remote port.
358 * Otherwise, this host uses the fc_transport, but not the
359 * remote port interface. As such, initialize to known non-values.
360 */
361 if (rport) {
362 fc_starget_node_name(starget) = rport->node_name;
363 fc_starget_port_name(starget) = rport->port_name;
364 fc_starget_port_id(starget) = rport->port_id;
365 } else {
366 fc_starget_node_name(starget) = -1;
367 fc_starget_port_name(starget) = -1;
368 fc_starget_port_id(starget) = -1;
369 }
370
371 return 0;
372}
373
374static DECLARE_TRANSPORT_CLASS(fc_transport_class,
375 "fc_transport",
376 fc_target_setup,
377 NULL,
378 NULL);
379
380static int fc_host_setup(struct transport_container *tc, struct device *dev,
381 struct device *cdev)
382{
383 struct Scsi_Host *shost = dev_to_shost(dev);
384 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
385
386 /*
387 * Set default values easily detected by the midlayer as
388 * failure cases. The scsi lldd is responsible for initializing
389 * all transport attributes to valid values per host.
390 */
391 fc_host->node_name = -1;
392 fc_host->port_name = -1;
393 fc_host->permanent_port_name = -1;
394 fc_host->supported_classes = FC_COS_UNSPECIFIED;
395 memset(fc_host->supported_fc4s, 0,
396 sizeof(fc_host->supported_fc4s));
397 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
398 fc_host->maxframe_size = -1;
399 fc_host->max_npiv_vports = 0;
400 memset(fc_host->serial_number, 0,
401 sizeof(fc_host->serial_number));
402
403 fc_host->port_id = -1;
404 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
405 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
406 memset(fc_host->active_fc4s, 0,
407 sizeof(fc_host->active_fc4s));
408 fc_host->speed = FC_PORTSPEED_UNKNOWN;
409 fc_host->fabric_name = -1;
410 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
411 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
412
413 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
414
415 INIT_LIST_HEAD(&fc_host->rports);
416 INIT_LIST_HEAD(&fc_host->rport_bindings);
417 INIT_LIST_HEAD(&fc_host->vports);
418 fc_host->next_rport_number = 0;
419 fc_host->next_target_id = 0;
420 fc_host->next_vport_number = 0;
421 fc_host->npiv_vports_inuse = 0;
422
423 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
424 "fc_wq_%d", shost->host_no);
425 fc_host->work_q = alloc_workqueue(fc_host->work_q_name, 0, 0);
426 if (!fc_host->work_q)
427 return -ENOMEM;
428
429 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
430 snprintf(fc_host->devloss_work_q_name,
431 sizeof(fc_host->devloss_work_q_name),
432 "fc_dl_%d", shost->host_no);
433 fc_host->devloss_work_q =
434 alloc_workqueue(fc_host->devloss_work_q_name, 0, 0);
435 if (!fc_host->devloss_work_q) {
436 destroy_workqueue(fc_host->work_q);
437 fc_host->work_q = NULL;
438 return -ENOMEM;
439 }
440
441 fc_bsg_hostadd(shost, fc_host);
442 /* ignore any bsg add error - we just can't do sgio */
443
444 return 0;
445}
446
447static int fc_host_remove(struct transport_container *tc, struct device *dev,
448 struct device *cdev)
449{
450 struct Scsi_Host *shost = dev_to_shost(dev);
451 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
452
453 fc_bsg_remove(fc_host->rqst_q);
454 return 0;
455}
456
457static DECLARE_TRANSPORT_CLASS(fc_host_class,
458 "fc_host",
459 fc_host_setup,
460 fc_host_remove,
461 NULL);
462
463/*
464 * Setup and Remove actions for remote ports are handled
465 * in the service functions below.
466 */
467static DECLARE_TRANSPORT_CLASS(fc_rport_class,
468 "fc_remote_ports",
469 NULL,
470 NULL,
471 NULL);
472
473/*
474 * Setup and Remove actions for virtual ports are handled
475 * in the service functions below.
476 */
477static DECLARE_TRANSPORT_CLASS(fc_vport_class,
478 "fc_vports",
479 NULL,
480 NULL,
481 NULL);
482
483/*
484 * Netlink Infrastructure
485 */
486
487static atomic_t fc_event_seq;
488
489/**
490 * fc_get_event_number - Obtain the next sequential FC event number
491 *
492 * Notes:
493 * We could have inlined this, but it would have required fc_event_seq to
494 * be exposed. For now, live with the subroutine call.
495 * Atomic used to avoid lock/unlock...
496 */
497u32
498fc_get_event_number(void)
499{
500 return atomic_add_return(1, &fc_event_seq);
501}
502EXPORT_SYMBOL(fc_get_event_number);
503
504
505/**
506 * fc_host_post_event - called to post an even on an fc_host.
507 * @shost: host the event occurred on
508 * @event_number: fc event number obtained from get_fc_event_number()
509 * @event_code: fc_host event being posted
510 * @event_data: 32bits of data for the event being posted
511 *
512 * Notes:
513 * This routine assumes no locks are held on entry.
514 */
515void
516fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
517 enum fc_host_event_code event_code, u32 event_data)
518{
519 struct sk_buff *skb;
520 struct nlmsghdr *nlh;
521 struct fc_nl_event *event;
522 const char *name;
523 u32 len, skblen;
524 int err;
525
526 if (!scsi_nl_sock) {
527 err = -ENOENT;
528 goto send_fail;
529 }
530
531 len = FC_NL_MSGALIGN(sizeof(*event));
532 skblen = NLMSG_SPACE(len);
533
534 skb = alloc_skb(skblen, GFP_KERNEL);
535 if (!skb) {
536 err = -ENOBUFS;
537 goto send_fail;
538 }
539
540 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
541 skblen - sizeof(*nlh), 0);
542 if (!nlh) {
543 err = -ENOBUFS;
544 goto send_fail_skb;
545 }
546 event = NLMSG_DATA(nlh);
547
548 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
549 FC_NL_ASYNC_EVENT, len);
550 event->seconds = get_seconds();
551 event->vendor_id = 0;
552 event->host_no = shost->host_no;
553 event->event_datalen = sizeof(u32); /* bytes */
554 event->event_num = event_number;
555 event->event_code = event_code;
556 event->event_data = event_data;
557
558 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
559 GFP_KERNEL);
560 return;
561
562send_fail_skb:
563 kfree_skb(skb);
564send_fail:
565 name = get_fc_host_event_code_name(event_code);
566 printk(KERN_WARNING
567 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
568 __func__, shost->host_no,
569 (name) ? name : "<unknown>", event_data, err);
570 return;
571}
572EXPORT_SYMBOL(fc_host_post_event);
573
574
575/**
576 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
577 * @shost: host the event occurred on
578 * @event_number: fc event number obtained from get_fc_event_number()
579 * @data_len: amount, in bytes, of vendor unique data
580 * @data_buf: pointer to vendor unique data
581 * @vendor_id: Vendor id
582 *
583 * Notes:
584 * This routine assumes no locks are held on entry.
585 */
586void
587fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
588 u32 data_len, char * data_buf, u64 vendor_id)
589{
590 struct sk_buff *skb;
591 struct nlmsghdr *nlh;
592 struct fc_nl_event *event;
593 u32 len, skblen;
594 int err;
595
596 if (!scsi_nl_sock) {
597 err = -ENOENT;
598 goto send_vendor_fail;
599 }
600
601 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
602 skblen = NLMSG_SPACE(len);
603
604 skb = alloc_skb(skblen, GFP_KERNEL);
605 if (!skb) {
606 err = -ENOBUFS;
607 goto send_vendor_fail;
608 }
609
610 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
611 skblen - sizeof(*nlh), 0);
612 if (!nlh) {
613 err = -ENOBUFS;
614 goto send_vendor_fail_skb;
615 }
616 event = NLMSG_DATA(nlh);
617
618 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
619 FC_NL_ASYNC_EVENT, len);
620 event->seconds = get_seconds();
621 event->vendor_id = vendor_id;
622 event->host_no = shost->host_no;
623 event->event_datalen = data_len; /* bytes */
624 event->event_num = event_number;
625 event->event_code = FCH_EVT_VENDOR_UNIQUE;
626 memcpy(&event->event_data, data_buf, data_len);
627
628 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
629 GFP_KERNEL);
630 return;
631
632send_vendor_fail_skb:
633 kfree_skb(skb);
634send_vendor_fail:
635 printk(KERN_WARNING
636 "%s: Dropped Event : host %d vendor_unique - err %d\n",
637 __func__, shost->host_no, err);
638 return;
639}
640EXPORT_SYMBOL(fc_host_post_vendor_event);
641
642
643
644static __init int fc_transport_init(void)
645{
646 int error;
647
648 atomic_set(&fc_event_seq, 0);
649
650 error = transport_class_register(&fc_host_class);
651 if (error)
652 return error;
653 error = transport_class_register(&fc_vport_class);
654 if (error)
655 goto unreg_host_class;
656 error = transport_class_register(&fc_rport_class);
657 if (error)
658 goto unreg_vport_class;
659 error = transport_class_register(&fc_transport_class);
660 if (error)
661 goto unreg_rport_class;
662 return 0;
663
664unreg_rport_class:
665 transport_class_unregister(&fc_rport_class);
666unreg_vport_class:
667 transport_class_unregister(&fc_vport_class);
668unreg_host_class:
669 transport_class_unregister(&fc_host_class);
670 return error;
671}
672
673static void __exit fc_transport_exit(void)
674{
675 transport_class_unregister(&fc_transport_class);
676 transport_class_unregister(&fc_rport_class);
677 transport_class_unregister(&fc_host_class);
678 transport_class_unregister(&fc_vport_class);
679}
680
681/*
682 * FC Remote Port Attribute Management
683 */
684
685#define fc_rport_show_function(field, format_string, sz, cast) \
686static ssize_t \
687show_fc_rport_##field (struct device *dev, \
688 struct device_attribute *attr, char *buf) \
689{ \
690 struct fc_rport *rport = transport_class_to_rport(dev); \
691 struct Scsi_Host *shost = rport_to_shost(rport); \
692 struct fc_internal *i = to_fc_internal(shost->transportt); \
693 if ((i->f->get_rport_##field) && \
694 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
695 (rport->port_state == FC_PORTSTATE_DELETED) || \
696 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
697 i->f->get_rport_##field(rport); \
698 return snprintf(buf, sz, format_string, cast rport->field); \
699}
700
701#define fc_rport_store_function(field) \
702static ssize_t \
703store_fc_rport_##field(struct device *dev, \
704 struct device_attribute *attr, \
705 const char *buf, size_t count) \
706{ \
707 int val; \
708 struct fc_rport *rport = transport_class_to_rport(dev); \
709 struct Scsi_Host *shost = rport_to_shost(rport); \
710 struct fc_internal *i = to_fc_internal(shost->transportt); \
711 char *cp; \
712 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
713 (rport->port_state == FC_PORTSTATE_DELETED) || \
714 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
715 return -EBUSY; \
716 val = simple_strtoul(buf, &cp, 0); \
717 if (*cp && (*cp != '\n')) \
718 return -EINVAL; \
719 i->f->set_rport_##field(rport, val); \
720 return count; \
721}
722
723#define fc_rport_rd_attr(field, format_string, sz) \
724 fc_rport_show_function(field, format_string, sz, ) \
725static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
726 show_fc_rport_##field, NULL)
727
728#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
729 fc_rport_show_function(field, format_string, sz, (cast)) \
730static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
731 show_fc_rport_##field, NULL)
732
733#define fc_rport_rw_attr(field, format_string, sz) \
734 fc_rport_show_function(field, format_string, sz, ) \
735 fc_rport_store_function(field) \
736static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
737 show_fc_rport_##field, \
738 store_fc_rport_##field)
739
740
741#define fc_private_rport_show_function(field, format_string, sz, cast) \
742static ssize_t \
743show_fc_rport_##field (struct device *dev, \
744 struct device_attribute *attr, char *buf) \
745{ \
746 struct fc_rport *rport = transport_class_to_rport(dev); \
747 return snprintf(buf, sz, format_string, cast rport->field); \
748}
749
750#define fc_private_rport_rd_attr(field, format_string, sz) \
751 fc_private_rport_show_function(field, format_string, sz, ) \
752static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
753 show_fc_rport_##field, NULL)
754
755#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
756 fc_private_rport_show_function(field, format_string, sz, (cast)) \
757static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
758 show_fc_rport_##field, NULL)
759
760
761#define fc_private_rport_rd_enum_attr(title, maxlen) \
762static ssize_t \
763show_fc_rport_##title (struct device *dev, \
764 struct device_attribute *attr, char *buf) \
765{ \
766 struct fc_rport *rport = transport_class_to_rport(dev); \
767 const char *name; \
768 name = get_fc_##title##_name(rport->title); \
769 if (!name) \
770 return -EINVAL; \
771 return snprintf(buf, maxlen, "%s\n", name); \
772} \
773static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
774 show_fc_rport_##title, NULL)
775
776
777#define SETUP_RPORT_ATTRIBUTE_RD(field) \
778 i->private_rport_attrs[count] = device_attr_rport_##field; \
779 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
780 i->private_rport_attrs[count].store = NULL; \
781 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
782 if (i->f->show_rport_##field) \
783 count++
784
785#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
786 i->private_rport_attrs[count] = device_attr_rport_##field; \
787 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
788 i->private_rport_attrs[count].store = NULL; \
789 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
790 count++
791
792#define SETUP_RPORT_ATTRIBUTE_RW(field) \
793 i->private_rport_attrs[count] = device_attr_rport_##field; \
794 if (!i->f->set_rport_##field) { \
795 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
796 i->private_rport_attrs[count].store = NULL; \
797 } \
798 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
799 if (i->f->show_rport_##field) \
800 count++
801
802#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
803{ \
804 i->private_rport_attrs[count] = device_attr_rport_##field; \
805 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
806 count++; \
807}
808
809
810/* The FC Transport Remote Port Attributes: */
811
812/* Fixed Remote Port Attributes */
813
814fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
815
816static ssize_t
817show_fc_rport_supported_classes (struct device *dev,
818 struct device_attribute *attr, char *buf)
819{
820 struct fc_rport *rport = transport_class_to_rport(dev);
821 if (rport->supported_classes == FC_COS_UNSPECIFIED)
822 return snprintf(buf, 20, "unspecified\n");
823 return get_fc_cos_names(rport->supported_classes, buf);
824}
825static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
826 show_fc_rport_supported_classes, NULL);
827
828/* Dynamic Remote Port Attributes */
829
830/*
831 * dev_loss_tmo attribute
832 */
833static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
834{
835 char *cp;
836
837 *val = simple_strtoul(buf, &cp, 0);
838 if ((*cp && (*cp != '\n')) || (*val < 0))
839 return -EINVAL;
840 /*
841 * Check for overflow; dev_loss_tmo is u32
842 */
843 if (*val > UINT_MAX)
844 return -EINVAL;
845
846 return 0;
847}
848
849static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
850 unsigned long val)
851{
852 struct Scsi_Host *shost = rport_to_shost(rport);
853 struct fc_internal *i = to_fc_internal(shost->transportt);
854
855 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
856 (rport->port_state == FC_PORTSTATE_DELETED) ||
857 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
858 return -EBUSY;
859 /*
860 * Check for overflow; dev_loss_tmo is u32
861 */
862 if (val > UINT_MAX)
863 return -EINVAL;
864
865 /*
866 * If fast_io_fail is off we have to cap
867 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
868 */
869 if (rport->fast_io_fail_tmo == -1 &&
870 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
871 return -EINVAL;
872
873 i->f->set_rport_dev_loss_tmo(rport, val);
874 return 0;
875}
876
877fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
878static ssize_t
879store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
880 const char *buf, size_t count)
881{
882 struct fc_rport *rport = transport_class_to_rport(dev);
883 unsigned long val;
884 int rc;
885
886 rc = fc_str_to_dev_loss(buf, &val);
887 if (rc)
888 return rc;
889
890 rc = fc_rport_set_dev_loss_tmo(rport, val);
891 if (rc)
892 return rc;
893 return count;
894}
895static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
896 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
897
898
899/* Private Remote Port Attributes */
900
901fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
902fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
903fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
904
905static ssize_t
906show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
907 char *buf)
908{
909 struct fc_rport *rport = transport_class_to_rport(dev);
910
911 /* identify any roles that are port_id specific */
912 if ((rport->port_id != -1) &&
913 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
914 FC_WELLKNOWN_PORTID_MASK) {
915 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
916 case FC_FPORT_PORTID:
917 return snprintf(buf, 30, "Fabric Port\n");
918 case FC_FABCTLR_PORTID:
919 return snprintf(buf, 30, "Fabric Controller\n");
920 case FC_DIRSRVR_PORTID:
921 return snprintf(buf, 30, "Directory Server\n");
922 case FC_TIMESRVR_PORTID:
923 return snprintf(buf, 30, "Time Server\n");
924 case FC_MGMTSRVR_PORTID:
925 return snprintf(buf, 30, "Management Server\n");
926 default:
927 return snprintf(buf, 30, "Unknown Fabric Entity\n");
928 }
929 } else {
930 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
931 return snprintf(buf, 20, "unknown\n");
932 return get_fc_port_roles_names(rport->roles, buf);
933 }
934}
935static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
936 show_fc_rport_roles, NULL);
937
938fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
939fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
940
941/*
942 * fast_io_fail_tmo attribute
943 */
944static ssize_t
945show_fc_rport_fast_io_fail_tmo (struct device *dev,
946 struct device_attribute *attr, char *buf)
947{
948 struct fc_rport *rport = transport_class_to_rport(dev);
949
950 if (rport->fast_io_fail_tmo == -1)
951 return snprintf(buf, 5, "off\n");
952 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
953}
954
955static ssize_t
956store_fc_rport_fast_io_fail_tmo(struct device *dev,
957 struct device_attribute *attr, const char *buf,
958 size_t count)
959{
960 int val;
961 char *cp;
962 struct fc_rport *rport = transport_class_to_rport(dev);
963
964 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
965 (rport->port_state == FC_PORTSTATE_DELETED) ||
966 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
967 return -EBUSY;
968 if (strncmp(buf, "off", 3) == 0)
969 rport->fast_io_fail_tmo = -1;
970 else {
971 val = simple_strtoul(buf, &cp, 0);
972 if ((*cp && (*cp != '\n')) || (val < 0))
973 return -EINVAL;
974 /*
975 * Cap fast_io_fail by dev_loss_tmo or
976 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
977 */
978 if ((val >= rport->dev_loss_tmo) ||
979 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
980 return -EINVAL;
981
982 rport->fast_io_fail_tmo = val;
983 }
984 return count;
985}
986static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
987 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
988
989
990/*
991 * FC SCSI Target Attribute Management
992 */
993
994/*
995 * Note: in the target show function we recognize when the remote
996 * port is in the hierarchy and do not allow the driver to get
997 * involved in sysfs functions. The driver only gets involved if
998 * it's the "old" style that doesn't use rports.
999 */
1000#define fc_starget_show_function(field, format_string, sz, cast) \
1001static ssize_t \
1002show_fc_starget_##field (struct device *dev, \
1003 struct device_attribute *attr, char *buf) \
1004{ \
1005 struct scsi_target *starget = transport_class_to_starget(dev); \
1006 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1007 struct fc_internal *i = to_fc_internal(shost->transportt); \
1008 struct fc_rport *rport = starget_to_rport(starget); \
1009 if (rport) \
1010 fc_starget_##field(starget) = rport->field; \
1011 else if (i->f->get_starget_##field) \
1012 i->f->get_starget_##field(starget); \
1013 return snprintf(buf, sz, format_string, \
1014 cast fc_starget_##field(starget)); \
1015}
1016
1017#define fc_starget_rd_attr(field, format_string, sz) \
1018 fc_starget_show_function(field, format_string, sz, ) \
1019static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1020 show_fc_starget_##field, NULL)
1021
1022#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1023 fc_starget_show_function(field, format_string, sz, (cast)) \
1024static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1025 show_fc_starget_##field, NULL)
1026
1027#define SETUP_STARGET_ATTRIBUTE_RD(field) \
1028 i->private_starget_attrs[count] = device_attr_starget_##field; \
1029 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1030 i->private_starget_attrs[count].store = NULL; \
1031 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1032 if (i->f->show_starget_##field) \
1033 count++
1034
1035#define SETUP_STARGET_ATTRIBUTE_RW(field) \
1036 i->private_starget_attrs[count] = device_attr_starget_##field; \
1037 if (!i->f->set_starget_##field) { \
1038 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1039 i->private_starget_attrs[count].store = NULL; \
1040 } \
1041 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1042 if (i->f->show_starget_##field) \
1043 count++
1044
1045/* The FC Transport SCSI Target Attributes: */
1046fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1047fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1048fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1049
1050
1051/*
1052 * FC Virtual Port Attribute Management
1053 */
1054
1055#define fc_vport_show_function(field, format_string, sz, cast) \
1056static ssize_t \
1057show_fc_vport_##field (struct device *dev, \
1058 struct device_attribute *attr, char *buf) \
1059{ \
1060 struct fc_vport *vport = transport_class_to_vport(dev); \
1061 struct Scsi_Host *shost = vport_to_shost(vport); \
1062 struct fc_internal *i = to_fc_internal(shost->transportt); \
1063 if ((i->f->get_vport_##field) && \
1064 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1065 i->f->get_vport_##field(vport); \
1066 return snprintf(buf, sz, format_string, cast vport->field); \
1067}
1068
1069#define fc_vport_store_function(field) \
1070static ssize_t \
1071store_fc_vport_##field(struct device *dev, \
1072 struct device_attribute *attr, \
1073 const char *buf, size_t count) \
1074{ \
1075 int val; \
1076 struct fc_vport *vport = transport_class_to_vport(dev); \
1077 struct Scsi_Host *shost = vport_to_shost(vport); \
1078 struct fc_internal *i = to_fc_internal(shost->transportt); \
1079 char *cp; \
1080 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1081 return -EBUSY; \
1082 val = simple_strtoul(buf, &cp, 0); \
1083 if (*cp && (*cp != '\n')) \
1084 return -EINVAL; \
1085 i->f->set_vport_##field(vport, val); \
1086 return count; \
1087}
1088
1089#define fc_vport_store_str_function(field, slen) \
1090static ssize_t \
1091store_fc_vport_##field(struct device *dev, \
1092 struct device_attribute *attr, \
1093 const char *buf, size_t count) \
1094{ \
1095 struct fc_vport *vport = transport_class_to_vport(dev); \
1096 struct Scsi_Host *shost = vport_to_shost(vport); \
1097 struct fc_internal *i = to_fc_internal(shost->transportt); \
1098 unsigned int cnt=count; \
1099 \
1100 /* count may include a LF at end of string */ \
1101 if (buf[cnt-1] == '\n') \
1102 cnt--; \
1103 if (cnt > ((slen) - 1)) \
1104 return -EINVAL; \
1105 memcpy(vport->field, buf, cnt); \
1106 i->f->set_vport_##field(vport); \
1107 return count; \
1108}
1109
1110#define fc_vport_rd_attr(field, format_string, sz) \
1111 fc_vport_show_function(field, format_string, sz, ) \
1112static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1113 show_fc_vport_##field, NULL)
1114
1115#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1116 fc_vport_show_function(field, format_string, sz, (cast)) \
1117static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1118 show_fc_vport_##field, NULL)
1119
1120#define fc_vport_rw_attr(field, format_string, sz) \
1121 fc_vport_show_function(field, format_string, sz, ) \
1122 fc_vport_store_function(field) \
1123static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1124 show_fc_vport_##field, \
1125 store_fc_vport_##field)
1126
1127#define fc_private_vport_show_function(field, format_string, sz, cast) \
1128static ssize_t \
1129show_fc_vport_##field (struct device *dev, \
1130 struct device_attribute *attr, char *buf) \
1131{ \
1132 struct fc_vport *vport = transport_class_to_vport(dev); \
1133 return snprintf(buf, sz, format_string, cast vport->field); \
1134}
1135
1136#define fc_private_vport_store_u32_function(field) \
1137static ssize_t \
1138store_fc_vport_##field(struct device *dev, \
1139 struct device_attribute *attr, \
1140 const char *buf, size_t count) \
1141{ \
1142 u32 val; \
1143 struct fc_vport *vport = transport_class_to_vport(dev); \
1144 char *cp; \
1145 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1146 return -EBUSY; \
1147 val = simple_strtoul(buf, &cp, 0); \
1148 if (*cp && (*cp != '\n')) \
1149 return -EINVAL; \
1150 vport->field = val; \
1151 return count; \
1152}
1153
1154
1155#define fc_private_vport_rd_attr(field, format_string, sz) \
1156 fc_private_vport_show_function(field, format_string, sz, ) \
1157static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1158 show_fc_vport_##field, NULL)
1159
1160#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1161 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1162static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1163 show_fc_vport_##field, NULL)
1164
1165#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1166 fc_private_vport_show_function(field, format_string, sz, ) \
1167 fc_private_vport_store_u32_function(field) \
1168static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1169 show_fc_vport_##field, \
1170 store_fc_vport_##field)
1171
1172
1173#define fc_private_vport_rd_enum_attr(title, maxlen) \
1174static ssize_t \
1175show_fc_vport_##title (struct device *dev, \
1176 struct device_attribute *attr, \
1177 char *buf) \
1178{ \
1179 struct fc_vport *vport = transport_class_to_vport(dev); \
1180 const char *name; \
1181 name = get_fc_##title##_name(vport->title); \
1182 if (!name) \
1183 return -EINVAL; \
1184 return snprintf(buf, maxlen, "%s\n", name); \
1185} \
1186static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1187 show_fc_vport_##title, NULL)
1188
1189
1190#define SETUP_VPORT_ATTRIBUTE_RD(field) \
1191 i->private_vport_attrs[count] = device_attr_vport_##field; \
1192 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1193 i->private_vport_attrs[count].store = NULL; \
1194 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1195 if (i->f->get_##field) \
1196 count++
1197 /* NOTE: Above MACRO differs: checks function not show bit */
1198
1199#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1200 i->private_vport_attrs[count] = device_attr_vport_##field; \
1201 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1202 i->private_vport_attrs[count].store = NULL; \
1203 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1204 count++
1205
1206#define SETUP_VPORT_ATTRIBUTE_WR(field) \
1207 i->private_vport_attrs[count] = device_attr_vport_##field; \
1208 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1209 if (i->f->field) \
1210 count++
1211 /* NOTE: Above MACRO differs: checks function */
1212
1213#define SETUP_VPORT_ATTRIBUTE_RW(field) \
1214 i->private_vport_attrs[count] = device_attr_vport_##field; \
1215 if (!i->f->set_vport_##field) { \
1216 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1217 i->private_vport_attrs[count].store = NULL; \
1218 } \
1219 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1220 count++
1221 /* NOTE: Above MACRO differs: does not check show bit */
1222
1223#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1224{ \
1225 i->private_vport_attrs[count] = device_attr_vport_##field; \
1226 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1227 count++; \
1228}
1229
1230
1231/* The FC Transport Virtual Port Attributes: */
1232
1233/* Fixed Virtual Port Attributes */
1234
1235/* Dynamic Virtual Port Attributes */
1236
1237/* Private Virtual Port Attributes */
1238
1239fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1240fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1241fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1242fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1243
1244static ssize_t
1245show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1246 char *buf)
1247{
1248 struct fc_vport *vport = transport_class_to_vport(dev);
1249
1250 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1251 return snprintf(buf, 20, "unknown\n");
1252 return get_fc_port_roles_names(vport->roles, buf);
1253}
1254static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1255
1256fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1257
1258fc_private_vport_show_function(symbolic_name, "%s\n",
1259 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1260fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1261static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1262 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1263
1264static ssize_t
1265store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1266 const char *buf, size_t count)
1267{
1268 struct fc_vport *vport = transport_class_to_vport(dev);
1269 struct Scsi_Host *shost = vport_to_shost(vport);
1270 unsigned long flags;
1271
1272 spin_lock_irqsave(shost->host_lock, flags);
1273 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1274 spin_unlock_irqrestore(shost->host_lock, flags);
1275 return -EBUSY;
1276 }
1277 vport->flags |= FC_VPORT_DELETING;
1278 spin_unlock_irqrestore(shost->host_lock, flags);
1279
1280 fc_queue_work(shost, &vport->vport_delete_work);
1281 return count;
1282}
1283static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1284 NULL, store_fc_vport_delete);
1285
1286
1287/*
1288 * Enable/Disable vport
1289 * Write "1" to disable, write "0" to enable
1290 */
1291static ssize_t
1292store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1293 const char *buf,
1294 size_t count)
1295{
1296 struct fc_vport *vport = transport_class_to_vport(dev);
1297 struct Scsi_Host *shost = vport_to_shost(vport);
1298 struct fc_internal *i = to_fc_internal(shost->transportt);
1299 int stat;
1300
1301 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1302 return -EBUSY;
1303
1304 if (*buf == '0') {
1305 if (vport->vport_state != FC_VPORT_DISABLED)
1306 return -EALREADY;
1307 } else if (*buf == '1') {
1308 if (vport->vport_state == FC_VPORT_DISABLED)
1309 return -EALREADY;
1310 } else
1311 return -EINVAL;
1312
1313 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1314 return stat ? stat : count;
1315}
1316static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1317 NULL, store_fc_vport_disable);
1318
1319
1320/*
1321 * Host Attribute Management
1322 */
1323
1324#define fc_host_show_function(field, format_string, sz, cast) \
1325static ssize_t \
1326show_fc_host_##field (struct device *dev, \
1327 struct device_attribute *attr, char *buf) \
1328{ \
1329 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1330 struct fc_internal *i = to_fc_internal(shost->transportt); \
1331 if (i->f->get_host_##field) \
1332 i->f->get_host_##field(shost); \
1333 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1334}
1335
1336#define fc_host_store_function(field) \
1337static ssize_t \
1338store_fc_host_##field(struct device *dev, \
1339 struct device_attribute *attr, \
1340 const char *buf, size_t count) \
1341{ \
1342 int val; \
1343 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1344 struct fc_internal *i = to_fc_internal(shost->transportt); \
1345 char *cp; \
1346 \
1347 val = simple_strtoul(buf, &cp, 0); \
1348 if (*cp && (*cp != '\n')) \
1349 return -EINVAL; \
1350 i->f->set_host_##field(shost, val); \
1351 return count; \
1352}
1353
1354#define fc_host_store_str_function(field, slen) \
1355static ssize_t \
1356store_fc_host_##field(struct device *dev, \
1357 struct device_attribute *attr, \
1358 const char *buf, size_t count) \
1359{ \
1360 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1361 struct fc_internal *i = to_fc_internal(shost->transportt); \
1362 unsigned int cnt=count; \
1363 \
1364 /* count may include a LF at end of string */ \
1365 if (buf[cnt-1] == '\n') \
1366 cnt--; \
1367 if (cnt > ((slen) - 1)) \
1368 return -EINVAL; \
1369 memcpy(fc_host_##field(shost), buf, cnt); \
1370 i->f->set_host_##field(shost); \
1371 return count; \
1372}
1373
1374#define fc_host_rd_attr(field, format_string, sz) \
1375 fc_host_show_function(field, format_string, sz, ) \
1376static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1377 show_fc_host_##field, NULL)
1378
1379#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1380 fc_host_show_function(field, format_string, sz, (cast)) \
1381static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1382 show_fc_host_##field, NULL)
1383
1384#define fc_host_rw_attr(field, format_string, sz) \
1385 fc_host_show_function(field, format_string, sz, ) \
1386 fc_host_store_function(field) \
1387static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1388 show_fc_host_##field, \
1389 store_fc_host_##field)
1390
1391#define fc_host_rd_enum_attr(title, maxlen) \
1392static ssize_t \
1393show_fc_host_##title (struct device *dev, \
1394 struct device_attribute *attr, char *buf) \
1395{ \
1396 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1397 struct fc_internal *i = to_fc_internal(shost->transportt); \
1398 const char *name; \
1399 if (i->f->get_host_##title) \
1400 i->f->get_host_##title(shost); \
1401 name = get_fc_##title##_name(fc_host_##title(shost)); \
1402 if (!name) \
1403 return -EINVAL; \
1404 return snprintf(buf, maxlen, "%s\n", name); \
1405} \
1406static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1407
1408#define SETUP_HOST_ATTRIBUTE_RD(field) \
1409 i->private_host_attrs[count] = device_attr_host_##field; \
1410 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1411 i->private_host_attrs[count].store = NULL; \
1412 i->host_attrs[count] = &i->private_host_attrs[count]; \
1413 if (i->f->show_host_##field) \
1414 count++
1415
1416#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1417 i->private_host_attrs[count] = device_attr_host_##field; \
1418 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1419 i->private_host_attrs[count].store = NULL; \
1420 i->host_attrs[count] = &i->private_host_attrs[count]; \
1421 count++
1422
1423#define SETUP_HOST_ATTRIBUTE_RW(field) \
1424 i->private_host_attrs[count] = device_attr_host_##field; \
1425 if (!i->f->set_host_##field) { \
1426 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1427 i->private_host_attrs[count].store = NULL; \
1428 } \
1429 i->host_attrs[count] = &i->private_host_attrs[count]; \
1430 if (i->f->show_host_##field) \
1431 count++
1432
1433
1434#define fc_private_host_show_function(field, format_string, sz, cast) \
1435static ssize_t \
1436show_fc_host_##field (struct device *dev, \
1437 struct device_attribute *attr, char *buf) \
1438{ \
1439 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1440 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1441}
1442
1443#define fc_private_host_rd_attr(field, format_string, sz) \
1444 fc_private_host_show_function(field, format_string, sz, ) \
1445static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1446 show_fc_host_##field, NULL)
1447
1448#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1449 fc_private_host_show_function(field, format_string, sz, (cast)) \
1450static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1451 show_fc_host_##field, NULL)
1452
1453#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1454 i->private_host_attrs[count] = device_attr_host_##field; \
1455 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1456 i->private_host_attrs[count].store = NULL; \
1457 i->host_attrs[count] = &i->private_host_attrs[count]; \
1458 count++
1459
1460#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1461{ \
1462 i->private_host_attrs[count] = device_attr_host_##field; \
1463 i->host_attrs[count] = &i->private_host_attrs[count]; \
1464 count++; \
1465}
1466
1467
1468/* Fixed Host Attributes */
1469
1470static ssize_t
1471show_fc_host_supported_classes (struct device *dev,
1472 struct device_attribute *attr, char *buf)
1473{
1474 struct Scsi_Host *shost = transport_class_to_shost(dev);
1475
1476 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1477 return snprintf(buf, 20, "unspecified\n");
1478
1479 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1480}
1481static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1482 show_fc_host_supported_classes, NULL);
1483
1484static ssize_t
1485show_fc_host_supported_fc4s (struct device *dev,
1486 struct device_attribute *attr, char *buf)
1487{
1488 struct Scsi_Host *shost = transport_class_to_shost(dev);
1489 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1490}
1491static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1492 show_fc_host_supported_fc4s, NULL);
1493
1494static ssize_t
1495show_fc_host_supported_speeds (struct device *dev,
1496 struct device_attribute *attr, char *buf)
1497{
1498 struct Scsi_Host *shost = transport_class_to_shost(dev);
1499
1500 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1501 return snprintf(buf, 20, "unknown\n");
1502
1503 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1504}
1505static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1506 show_fc_host_supported_speeds, NULL);
1507
1508
1509fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1510fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1511fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1512 unsigned long long);
1513fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1514fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1515fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1516
1517
1518/* Dynamic Host Attributes */
1519
1520static ssize_t
1521show_fc_host_active_fc4s (struct device *dev,
1522 struct device_attribute *attr, char *buf)
1523{
1524 struct Scsi_Host *shost = transport_class_to_shost(dev);
1525 struct fc_internal *i = to_fc_internal(shost->transportt);
1526
1527 if (i->f->get_host_active_fc4s)
1528 i->f->get_host_active_fc4s(shost);
1529
1530 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1531}
1532static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1533 show_fc_host_active_fc4s, NULL);
1534
1535static ssize_t
1536show_fc_host_speed (struct device *dev,
1537 struct device_attribute *attr, char *buf)
1538{
1539 struct Scsi_Host *shost = transport_class_to_shost(dev);
1540 struct fc_internal *i = to_fc_internal(shost->transportt);
1541
1542 if (i->f->get_host_speed)
1543 i->f->get_host_speed(shost);
1544
1545 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1546 return snprintf(buf, 20, "unknown\n");
1547
1548 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1549}
1550static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1551 show_fc_host_speed, NULL);
1552
1553
1554fc_host_rd_attr(port_id, "0x%06x\n", 20);
1555fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1556fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1557fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1558fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1559
1560fc_private_host_show_function(system_hostname, "%s\n",
1561 FC_SYMBOLIC_NAME_SIZE + 1, )
1562fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1563static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1564 show_fc_host_system_hostname, store_fc_host_system_hostname);
1565
1566
1567/* Private Host Attributes */
1568
1569static ssize_t
1570show_fc_private_host_tgtid_bind_type(struct device *dev,
1571 struct device_attribute *attr, char *buf)
1572{
1573 struct Scsi_Host *shost = transport_class_to_shost(dev);
1574 const char *name;
1575
1576 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1577 if (!name)
1578 return -EINVAL;
1579 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1580}
1581
1582#define get_list_head_entry(pos, head, member) \
1583 pos = list_entry((head)->next, typeof(*pos), member)
1584
1585static ssize_t
1586store_fc_private_host_tgtid_bind_type(struct device *dev,
1587 struct device_attribute *attr, const char *buf, size_t count)
1588{
1589 struct Scsi_Host *shost = transport_class_to_shost(dev);
1590 struct fc_rport *rport;
1591 enum fc_tgtid_binding_type val;
1592 unsigned long flags;
1593
1594 if (get_fc_tgtid_bind_type_match(buf, &val))
1595 return -EINVAL;
1596
1597 /* if changing bind type, purge all unused consistent bindings */
1598 if (val != fc_host_tgtid_bind_type(shost)) {
1599 spin_lock_irqsave(shost->host_lock, flags);
1600 while (!list_empty(&fc_host_rport_bindings(shost))) {
1601 get_list_head_entry(rport,
1602 &fc_host_rport_bindings(shost), peers);
1603 list_del(&rport->peers);
1604 rport->port_state = FC_PORTSTATE_DELETED;
1605 fc_queue_work(shost, &rport->rport_delete_work);
1606 }
1607 spin_unlock_irqrestore(shost->host_lock, flags);
1608 }
1609
1610 fc_host_tgtid_bind_type(shost) = val;
1611 return count;
1612}
1613
1614static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1615 show_fc_private_host_tgtid_bind_type,
1616 store_fc_private_host_tgtid_bind_type);
1617
1618static ssize_t
1619store_fc_private_host_issue_lip(struct device *dev,
1620 struct device_attribute *attr, const char *buf, size_t count)
1621{
1622 struct Scsi_Host *shost = transport_class_to_shost(dev);
1623 struct fc_internal *i = to_fc_internal(shost->transportt);
1624 int ret;
1625
1626 /* ignore any data value written to the attribute */
1627 if (i->f->issue_fc_host_lip) {
1628 ret = i->f->issue_fc_host_lip(shost);
1629 return ret ? ret: count;
1630 }
1631
1632 return -ENOENT;
1633}
1634
1635static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1636 store_fc_private_host_issue_lip);
1637
1638static ssize_t
1639store_fc_private_host_dev_loss_tmo(struct device *dev,
1640 struct device_attribute *attr,
1641 const char *buf, size_t count)
1642{
1643 struct Scsi_Host *shost = transport_class_to_shost(dev);
1644 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1645 struct fc_rport *rport;
1646 unsigned long val, flags;
1647 int rc;
1648
1649 rc = fc_str_to_dev_loss(buf, &val);
1650 if (rc)
1651 return rc;
1652
1653 fc_host_dev_loss_tmo(shost) = val;
1654 spin_lock_irqsave(shost->host_lock, flags);
1655 list_for_each_entry(rport, &fc_host->rports, peers)
1656 fc_rport_set_dev_loss_tmo(rport, val);
1657 spin_unlock_irqrestore(shost->host_lock, flags);
1658 return count;
1659}
1660
1661fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1662static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1663 show_fc_host_dev_loss_tmo,
1664 store_fc_private_host_dev_loss_tmo);
1665
1666fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1667
1668/*
1669 * Host Statistics Management
1670 */
1671
1672/* Show a given an attribute in the statistics group */
1673static ssize_t
1674fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1675{
1676 struct Scsi_Host *shost = transport_class_to_shost(dev);
1677 struct fc_internal *i = to_fc_internal(shost->transportt);
1678 struct fc_host_statistics *stats;
1679 ssize_t ret = -ENOENT;
1680
1681 if (offset > sizeof(struct fc_host_statistics) ||
1682 offset % sizeof(u64) != 0)
1683 WARN_ON(1);
1684
1685 if (i->f->get_fc_host_stats) {
1686 stats = (i->f->get_fc_host_stats)(shost);
1687 if (stats)
1688 ret = snprintf(buf, 20, "0x%llx\n",
1689 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1690 }
1691 return ret;
1692}
1693
1694
1695/* generate a read-only statistics attribute */
1696#define fc_host_statistic(name) \
1697static ssize_t show_fcstat_##name(struct device *cd, \
1698 struct device_attribute *attr, \
1699 char *buf) \
1700{ \
1701 return fc_stat_show(cd, buf, \
1702 offsetof(struct fc_host_statistics, name)); \
1703} \
1704static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1705
1706fc_host_statistic(seconds_since_last_reset);
1707fc_host_statistic(tx_frames);
1708fc_host_statistic(tx_words);
1709fc_host_statistic(rx_frames);
1710fc_host_statistic(rx_words);
1711fc_host_statistic(lip_count);
1712fc_host_statistic(nos_count);
1713fc_host_statistic(error_frames);
1714fc_host_statistic(dumped_frames);
1715fc_host_statistic(link_failure_count);
1716fc_host_statistic(loss_of_sync_count);
1717fc_host_statistic(loss_of_signal_count);
1718fc_host_statistic(prim_seq_protocol_err_count);
1719fc_host_statistic(invalid_tx_word_count);
1720fc_host_statistic(invalid_crc_count);
1721fc_host_statistic(fcp_input_requests);
1722fc_host_statistic(fcp_output_requests);
1723fc_host_statistic(fcp_control_requests);
1724fc_host_statistic(fcp_input_megabytes);
1725fc_host_statistic(fcp_output_megabytes);
1726
1727static ssize_t
1728fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1729 const char *buf, size_t count)
1730{
1731 struct Scsi_Host *shost = transport_class_to_shost(dev);
1732 struct fc_internal *i = to_fc_internal(shost->transportt);
1733
1734 /* ignore any data value written to the attribute */
1735 if (i->f->reset_fc_host_stats) {
1736 i->f->reset_fc_host_stats(shost);
1737 return count;
1738 }
1739
1740 return -ENOENT;
1741}
1742static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1743 fc_reset_statistics);
1744
1745static struct attribute *fc_statistics_attrs[] = {
1746 &device_attr_host_seconds_since_last_reset.attr,
1747 &device_attr_host_tx_frames.attr,
1748 &device_attr_host_tx_words.attr,
1749 &device_attr_host_rx_frames.attr,
1750 &device_attr_host_rx_words.attr,
1751 &device_attr_host_lip_count.attr,
1752 &device_attr_host_nos_count.attr,
1753 &device_attr_host_error_frames.attr,
1754 &device_attr_host_dumped_frames.attr,
1755 &device_attr_host_link_failure_count.attr,
1756 &device_attr_host_loss_of_sync_count.attr,
1757 &device_attr_host_loss_of_signal_count.attr,
1758 &device_attr_host_prim_seq_protocol_err_count.attr,
1759 &device_attr_host_invalid_tx_word_count.attr,
1760 &device_attr_host_invalid_crc_count.attr,
1761 &device_attr_host_fcp_input_requests.attr,
1762 &device_attr_host_fcp_output_requests.attr,
1763 &device_attr_host_fcp_control_requests.attr,
1764 &device_attr_host_fcp_input_megabytes.attr,
1765 &device_attr_host_fcp_output_megabytes.attr,
1766 &device_attr_host_reset_statistics.attr,
1767 NULL
1768};
1769
1770static struct attribute_group fc_statistics_group = {
1771 .name = "statistics",
1772 .attrs = fc_statistics_attrs,
1773};
1774
1775
1776/* Host Vport Attributes */
1777
1778static int
1779fc_parse_wwn(const char *ns, u64 *nm)
1780{
1781 unsigned int i, j;
1782 u8 wwn[8];
1783
1784 memset(wwn, 0, sizeof(wwn));
1785
1786 /* Validate and store the new name */
1787 for (i=0, j=0; i < 16; i++) {
1788 int value;
1789
1790 value = hex_to_bin(*ns++);
1791 if (value >= 0)
1792 j = (j << 4) | value;
1793 else
1794 return -EINVAL;
1795 if (i % 2) {
1796 wwn[i/2] = j & 0xff;
1797 j = 0;
1798 }
1799 }
1800
1801 *nm = wwn_to_u64(wwn);
1802
1803 return 0;
1804}
1805
1806
1807/*
1808 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1809 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1810 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1811 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1812 */
1813static ssize_t
1814store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1815 const char *buf, size_t count)
1816{
1817 struct Scsi_Host *shost = transport_class_to_shost(dev);
1818 struct fc_vport_identifiers vid;
1819 struct fc_vport *vport;
1820 unsigned int cnt=count;
1821 int stat;
1822
1823 memset(&vid, 0, sizeof(vid));
1824
1825 /* count may include a LF at end of string */
1826 if (buf[cnt-1] == '\n')
1827 cnt--;
1828
1829 /* validate we have enough characters for WWPN */
1830 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1831 return -EINVAL;
1832
1833 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1834 if (stat)
1835 return stat;
1836
1837 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1838 if (stat)
1839 return stat;
1840
1841 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1842 vid.vport_type = FC_PORTTYPE_NPIV;
1843 /* vid.symbolic_name is already zero/NULL's */
1844 vid.disable = false; /* always enabled */
1845
1846 /* we only allow support on Channel 0 !!! */
1847 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1848 return stat ? stat : count;
1849}
1850static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1851 store_fc_host_vport_create);
1852
1853
1854/*
1855 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1856 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1857 * The WWNs are specified as hex characters, and may *not* contain
1858 * any prefixes (e.g. 0x, x, etc)
1859 */
1860static ssize_t
1861store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1862 const char *buf, size_t count)
1863{
1864 struct Scsi_Host *shost = transport_class_to_shost(dev);
1865 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1866 struct fc_vport *vport;
1867 u64 wwpn, wwnn;
1868 unsigned long flags;
1869 unsigned int cnt=count;
1870 int stat, match;
1871
1872 /* count may include a LF at end of string */
1873 if (buf[cnt-1] == '\n')
1874 cnt--;
1875
1876 /* validate we have enough characters for WWPN */
1877 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1878 return -EINVAL;
1879
1880 stat = fc_parse_wwn(&buf[0], &wwpn);
1881 if (stat)
1882 return stat;
1883
1884 stat = fc_parse_wwn(&buf[17], &wwnn);
1885 if (stat)
1886 return stat;
1887
1888 spin_lock_irqsave(shost->host_lock, flags);
1889 match = 0;
1890 /* we only allow support on Channel 0 !!! */
1891 list_for_each_entry(vport, &fc_host->vports, peers) {
1892 if ((vport->channel == 0) &&
1893 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1894 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1895 break;
1896 vport->flags |= FC_VPORT_DELETING;
1897 match = 1;
1898 break;
1899 }
1900 }
1901 spin_unlock_irqrestore(shost->host_lock, flags);
1902
1903 if (!match)
1904 return -ENODEV;
1905
1906 stat = fc_vport_terminate(vport);
1907 return stat ? stat : count;
1908}
1909static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1910 store_fc_host_vport_delete);
1911
1912
1913static int fc_host_match(struct attribute_container *cont,
1914 struct device *dev)
1915{
1916 struct Scsi_Host *shost;
1917 struct fc_internal *i;
1918
1919 if (!scsi_is_host_device(dev))
1920 return 0;
1921
1922 shost = dev_to_shost(dev);
1923 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1924 != &fc_host_class.class)
1925 return 0;
1926
1927 i = to_fc_internal(shost->transportt);
1928
1929 return &i->t.host_attrs.ac == cont;
1930}
1931
1932static int fc_target_match(struct attribute_container *cont,
1933 struct device *dev)
1934{
1935 struct Scsi_Host *shost;
1936 struct fc_internal *i;
1937
1938 if (!scsi_is_target_device(dev))
1939 return 0;
1940
1941 shost = dev_to_shost(dev->parent);
1942 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1943 != &fc_host_class.class)
1944 return 0;
1945
1946 i = to_fc_internal(shost->transportt);
1947
1948 return &i->t.target_attrs.ac == cont;
1949}
1950
1951static void fc_rport_dev_release(struct device *dev)
1952{
1953 struct fc_rport *rport = dev_to_rport(dev);
1954 put_device(dev->parent);
1955 kfree(rport);
1956}
1957
1958int scsi_is_fc_rport(const struct device *dev)
1959{
1960 return dev->release == fc_rport_dev_release;
1961}
1962EXPORT_SYMBOL(scsi_is_fc_rport);
1963
1964static int fc_rport_match(struct attribute_container *cont,
1965 struct device *dev)
1966{
1967 struct Scsi_Host *shost;
1968 struct fc_internal *i;
1969
1970 if (!scsi_is_fc_rport(dev))
1971 return 0;
1972
1973 shost = dev_to_shost(dev->parent);
1974 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1975 != &fc_host_class.class)
1976 return 0;
1977
1978 i = to_fc_internal(shost->transportt);
1979
1980 return &i->rport_attr_cont.ac == cont;
1981}
1982
1983
1984static void fc_vport_dev_release(struct device *dev)
1985{
1986 struct fc_vport *vport = dev_to_vport(dev);
1987 put_device(dev->parent); /* release kobj parent */
1988 kfree(vport);
1989}
1990
1991int scsi_is_fc_vport(const struct device *dev)
1992{
1993 return dev->release == fc_vport_dev_release;
1994}
1995EXPORT_SYMBOL(scsi_is_fc_vport);
1996
1997static int fc_vport_match(struct attribute_container *cont,
1998 struct device *dev)
1999{
2000 struct fc_vport *vport;
2001 struct Scsi_Host *shost;
2002 struct fc_internal *i;
2003
2004 if (!scsi_is_fc_vport(dev))
2005 return 0;
2006 vport = dev_to_vport(dev);
2007
2008 shost = vport_to_shost(vport);
2009 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2010 != &fc_host_class.class)
2011 return 0;
2012
2013 i = to_fc_internal(shost->transportt);
2014 return &i->vport_attr_cont.ac == cont;
2015}
2016
2017
2018/**
2019 * fc_timed_out - FC Transport I/O timeout intercept handler
2020 * @scmd: The SCSI command which timed out
2021 *
2022 * This routine protects against error handlers getting invoked while a
2023 * rport is in a blocked state, typically due to a temporarily loss of
2024 * connectivity. If the error handlers are allowed to proceed, requests
2025 * to abort i/o, reset the target, etc will likely fail as there is no way
2026 * to communicate with the device to perform the requested function. These
2027 * failures may result in the midlayer taking the device offline, requiring
2028 * manual intervention to restore operation.
2029 *
2030 * This routine, called whenever an i/o times out, validates the state of
2031 * the underlying rport. If the rport is blocked, it returns
2032 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2033 * Eventually, either the device will return, or devloss_tmo will fire,
2034 * and when the timeout then fires, it will be handled normally.
2035 * If the rport is not blocked, normal error handling continues.
2036 *
2037 * Notes:
2038 * This routine assumes no locks are held on entry.
2039 */
2040static enum blk_eh_timer_return
2041fc_timed_out(struct scsi_cmnd *scmd)
2042{
2043 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2044
2045 if (rport->port_state == FC_PORTSTATE_BLOCKED)
2046 return BLK_EH_RESET_TIMER;
2047
2048 return BLK_EH_NOT_HANDLED;
2049}
2050
2051/*
2052 * Called by fc_user_scan to locate an rport on the shost that
2053 * matches the channel and target id, and invoke scsi_scan_target()
2054 * on the rport.
2055 */
2056static void
2057fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2058{
2059 struct fc_rport *rport;
2060 unsigned long flags;
2061
2062 spin_lock_irqsave(shost->host_lock, flags);
2063
2064 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2065 if (rport->scsi_target_id == -1)
2066 continue;
2067
2068 if (rport->port_state != FC_PORTSTATE_ONLINE)
2069 continue;
2070
2071 if ((channel == rport->channel) &&
2072 (id == rport->scsi_target_id)) {
2073 spin_unlock_irqrestore(shost->host_lock, flags);
2074 scsi_scan_target(&rport->dev, channel, id, lun, 1);
2075 return;
2076 }
2077 }
2078
2079 spin_unlock_irqrestore(shost->host_lock, flags);
2080}
2081
2082/*
2083 * Called via sysfs scan routines. Necessary, as the FC transport
2084 * wants to place all target objects below the rport object. So this
2085 * routine must invoke the scsi_scan_target() routine with the rport
2086 * object as the parent.
2087 */
2088static int
2089fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2090{
2091 uint chlo, chhi;
2092 uint tgtlo, tgthi;
2093
2094 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2095 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2096 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2097 return -EINVAL;
2098
2099 if (channel == SCAN_WILD_CARD) {
2100 chlo = 0;
2101 chhi = shost->max_channel + 1;
2102 } else {
2103 chlo = channel;
2104 chhi = channel + 1;
2105 }
2106
2107 if (id == SCAN_WILD_CARD) {
2108 tgtlo = 0;
2109 tgthi = shost->max_id;
2110 } else {
2111 tgtlo = id;
2112 tgthi = id + 1;
2113 }
2114
2115 for ( ; chlo < chhi; chlo++)
2116 for ( ; tgtlo < tgthi; tgtlo++)
2117 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2118
2119 return 0;
2120}
2121
2122static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2123 int result)
2124{
2125 struct fc_internal *i = to_fc_internal(shost->transportt);
2126 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2127}
2128
2129static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2130{
2131 struct fc_internal *i = to_fc_internal(shost->transportt);
2132 return i->f->it_nexus_response(shost, nexus, result);
2133}
2134
2135struct scsi_transport_template *
2136fc_attach_transport(struct fc_function_template *ft)
2137{
2138 int count;
2139 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2140 GFP_KERNEL);
2141
2142 if (unlikely(!i))
2143 return NULL;
2144
2145 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2146 i->t.target_attrs.ac.class = &fc_transport_class.class;
2147 i->t.target_attrs.ac.match = fc_target_match;
2148 i->t.target_size = sizeof(struct fc_starget_attrs);
2149 transport_container_register(&i->t.target_attrs);
2150
2151 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2152 i->t.host_attrs.ac.class = &fc_host_class.class;
2153 i->t.host_attrs.ac.match = fc_host_match;
2154 i->t.host_size = sizeof(struct fc_host_attrs);
2155 if (ft->get_fc_host_stats)
2156 i->t.host_attrs.statistics = &fc_statistics_group;
2157 transport_container_register(&i->t.host_attrs);
2158
2159 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2160 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2161 i->rport_attr_cont.ac.match = fc_rport_match;
2162 transport_container_register(&i->rport_attr_cont);
2163
2164 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2165 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2166 i->vport_attr_cont.ac.match = fc_vport_match;
2167 transport_container_register(&i->vport_attr_cont);
2168
2169 i->f = ft;
2170
2171 /* Transport uses the shost workq for scsi scanning */
2172 i->t.create_work_queue = 1;
2173
2174 i->t.eh_timed_out = fc_timed_out;
2175
2176 i->t.user_scan = fc_user_scan;
2177
2178 /* target-mode drivers' functions */
2179 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2180 i->t.it_nexus_response = fc_it_nexus_response;
2181
2182 /*
2183 * Setup SCSI Target Attributes.
2184 */
2185 count = 0;
2186 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2187 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2188 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2189
2190 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2191
2192 i->starget_attrs[count] = NULL;
2193
2194
2195 /*
2196 * Setup SCSI Host Attributes.
2197 */
2198 count=0;
2199 SETUP_HOST_ATTRIBUTE_RD(node_name);
2200 SETUP_HOST_ATTRIBUTE_RD(port_name);
2201 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2202 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2203 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2204 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2205 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2206 if (ft->vport_create) {
2207 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2208 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2209 }
2210 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2211
2212 SETUP_HOST_ATTRIBUTE_RD(port_id);
2213 SETUP_HOST_ATTRIBUTE_RD(port_type);
2214 SETUP_HOST_ATTRIBUTE_RD(port_state);
2215 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2216 SETUP_HOST_ATTRIBUTE_RD(speed);
2217 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2218 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2219 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2220
2221 /* Transport-managed attributes */
2222 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2223 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2224 if (ft->issue_fc_host_lip)
2225 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2226 if (ft->vport_create)
2227 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2228 if (ft->vport_delete)
2229 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2230
2231 BUG_ON(count > FC_HOST_NUM_ATTRS);
2232
2233 i->host_attrs[count] = NULL;
2234
2235 /*
2236 * Setup Remote Port Attributes.
2237 */
2238 count=0;
2239 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2240 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2241 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2242 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2243 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2244 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2245 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2246 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2247 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2248 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2249
2250 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2251
2252 i->rport_attrs[count] = NULL;
2253
2254 /*
2255 * Setup Virtual Port Attributes.
2256 */
2257 count=0;
2258 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2259 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2260 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2261 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2262 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2263 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2264 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2265 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2266 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2267
2268 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2269
2270 i->vport_attrs[count] = NULL;
2271
2272 return &i->t;
2273}
2274EXPORT_SYMBOL(fc_attach_transport);
2275
2276void fc_release_transport(struct scsi_transport_template *t)
2277{
2278 struct fc_internal *i = to_fc_internal(t);
2279
2280 transport_container_unregister(&i->t.target_attrs);
2281 transport_container_unregister(&i->t.host_attrs);
2282 transport_container_unregister(&i->rport_attr_cont);
2283 transport_container_unregister(&i->vport_attr_cont);
2284
2285 kfree(i);
2286}
2287EXPORT_SYMBOL(fc_release_transport);
2288
2289/**
2290 * fc_queue_work - Queue work to the fc_host workqueue.
2291 * @shost: Pointer to Scsi_Host bound to fc_host.
2292 * @work: Work to queue for execution.
2293 *
2294 * Return value:
2295 * 1 - work queued for execution
2296 * 0 - work is already queued
2297 * -EINVAL - work queue doesn't exist
2298 */
2299static int
2300fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2301{
2302 if (unlikely(!fc_host_work_q(shost))) {
2303 printk(KERN_ERR
2304 "ERROR: FC host '%s' attempted to queue work, "
2305 "when no workqueue created.\n", shost->hostt->name);
2306 dump_stack();
2307
2308 return -EINVAL;
2309 }
2310
2311 return queue_work(fc_host_work_q(shost), work);
2312}
2313
2314/**
2315 * fc_flush_work - Flush a fc_host's workqueue.
2316 * @shost: Pointer to Scsi_Host bound to fc_host.
2317 */
2318static void
2319fc_flush_work(struct Scsi_Host *shost)
2320{
2321 if (!fc_host_work_q(shost)) {
2322 printk(KERN_ERR
2323 "ERROR: FC host '%s' attempted to flush work, "
2324 "when no workqueue created.\n", shost->hostt->name);
2325 dump_stack();
2326 return;
2327 }
2328
2329 flush_workqueue(fc_host_work_q(shost));
2330}
2331
2332/**
2333 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2334 * @shost: Pointer to Scsi_Host bound to fc_host.
2335 * @work: Work to queue for execution.
2336 * @delay: jiffies to delay the work queuing
2337 *
2338 * Return value:
2339 * 1 on success / 0 already queued / < 0 for error
2340 */
2341static int
2342fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2343 unsigned long delay)
2344{
2345 if (unlikely(!fc_host_devloss_work_q(shost))) {
2346 printk(KERN_ERR
2347 "ERROR: FC host '%s' attempted to queue work, "
2348 "when no workqueue created.\n", shost->hostt->name);
2349 dump_stack();
2350
2351 return -EINVAL;
2352 }
2353
2354 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2355}
2356
2357/**
2358 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2359 * @shost: Pointer to Scsi_Host bound to fc_host.
2360 */
2361static void
2362fc_flush_devloss(struct Scsi_Host *shost)
2363{
2364 if (!fc_host_devloss_work_q(shost)) {
2365 printk(KERN_ERR
2366 "ERROR: FC host '%s' attempted to flush work, "
2367 "when no workqueue created.\n", shost->hostt->name);
2368 dump_stack();
2369 return;
2370 }
2371
2372 flush_workqueue(fc_host_devloss_work_q(shost));
2373}
2374
2375
2376/**
2377 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2378 * @shost: Which &Scsi_Host
2379 *
2380 * This routine is expected to be called immediately preceding the
2381 * a driver's call to scsi_remove_host().
2382 *
2383 * WARNING: A driver utilizing the fc_transport, which fails to call
2384 * this routine prior to scsi_remove_host(), will leave dangling
2385 * objects in /sys/class/fc_remote_ports. Access to any of these
2386 * objects can result in a system crash !!!
2387 *
2388 * Notes:
2389 * This routine assumes no locks are held on entry.
2390 */
2391void
2392fc_remove_host(struct Scsi_Host *shost)
2393{
2394 struct fc_vport *vport = NULL, *next_vport = NULL;
2395 struct fc_rport *rport = NULL, *next_rport = NULL;
2396 struct workqueue_struct *work_q;
2397 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2398 unsigned long flags;
2399
2400 spin_lock_irqsave(shost->host_lock, flags);
2401
2402 /* Remove any vports */
2403 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2404 fc_queue_work(shost, &vport->vport_delete_work);
2405
2406 /* Remove any remote ports */
2407 list_for_each_entry_safe(rport, next_rport,
2408 &fc_host->rports, peers) {
2409 list_del(&rport->peers);
2410 rport->port_state = FC_PORTSTATE_DELETED;
2411 fc_queue_work(shost, &rport->rport_delete_work);
2412 }
2413
2414 list_for_each_entry_safe(rport, next_rport,
2415 &fc_host->rport_bindings, peers) {
2416 list_del(&rport->peers);
2417 rport->port_state = FC_PORTSTATE_DELETED;
2418 fc_queue_work(shost, &rport->rport_delete_work);
2419 }
2420
2421 spin_unlock_irqrestore(shost->host_lock, flags);
2422
2423 /* flush all scan work items */
2424 scsi_flush_work(shost);
2425
2426 /* flush all stgt delete, and rport delete work items, then kill it */
2427 if (fc_host->work_q) {
2428 work_q = fc_host->work_q;
2429 fc_host->work_q = NULL;
2430 destroy_workqueue(work_q);
2431 }
2432
2433 /* flush all devloss work items, then kill it */
2434 if (fc_host->devloss_work_q) {
2435 work_q = fc_host->devloss_work_q;
2436 fc_host->devloss_work_q = NULL;
2437 destroy_workqueue(work_q);
2438 }
2439}
2440EXPORT_SYMBOL(fc_remove_host);
2441
2442static void fc_terminate_rport_io(struct fc_rport *rport)
2443{
2444 struct Scsi_Host *shost = rport_to_shost(rport);
2445 struct fc_internal *i = to_fc_internal(shost->transportt);
2446
2447 /* Involve the LLDD if possible to terminate all io on the rport. */
2448 if (i->f->terminate_rport_io)
2449 i->f->terminate_rport_io(rport);
2450
2451 /*
2452 * must unblock to flush queued IO. The caller will have set
2453 * the port_state or flags, so that fc_remote_port_chkready will
2454 * fail IO.
2455 */
2456 scsi_target_unblock(&rport->dev);
2457}
2458
2459/**
2460 * fc_starget_delete - called to delete the scsi descendants of an rport
2461 * @work: remote port to be operated on.
2462 *
2463 * Deletes target and all sdevs.
2464 */
2465static void
2466fc_starget_delete(struct work_struct *work)
2467{
2468 struct fc_rport *rport =
2469 container_of(work, struct fc_rport, stgt_delete_work);
2470
2471 fc_terminate_rport_io(rport);
2472 scsi_remove_target(&rport->dev);
2473}
2474
2475
2476/**
2477 * fc_rport_final_delete - finish rport termination and delete it.
2478 * @work: remote port to be deleted.
2479 */
2480static void
2481fc_rport_final_delete(struct work_struct *work)
2482{
2483 struct fc_rport *rport =
2484 container_of(work, struct fc_rport, rport_delete_work);
2485 struct device *dev = &rport->dev;
2486 struct Scsi_Host *shost = rport_to_shost(rport);
2487 struct fc_internal *i = to_fc_internal(shost->transportt);
2488 unsigned long flags;
2489 int do_callback = 0;
2490
2491 fc_terminate_rport_io(rport);
2492
2493 /*
2494 * if a scan is pending, flush the SCSI Host work_q so that
2495 * that we can reclaim the rport scan work element.
2496 */
2497 if (rport->flags & FC_RPORT_SCAN_PENDING)
2498 scsi_flush_work(shost);
2499
2500 /*
2501 * Cancel any outstanding timers. These should really exist
2502 * only when rmmod'ing the LLDD and we're asking for
2503 * immediate termination of the rports
2504 */
2505 spin_lock_irqsave(shost->host_lock, flags);
2506 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2507 spin_unlock_irqrestore(shost->host_lock, flags);
2508 if (!cancel_delayed_work(&rport->fail_io_work))
2509 fc_flush_devloss(shost);
2510 if (!cancel_delayed_work(&rport->dev_loss_work))
2511 fc_flush_devloss(shost);
2512 spin_lock_irqsave(shost->host_lock, flags);
2513 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2514 }
2515 spin_unlock_irqrestore(shost->host_lock, flags);
2516
2517 /* Delete SCSI target and sdevs */
2518 if (rport->scsi_target_id != -1)
2519 fc_starget_delete(&rport->stgt_delete_work);
2520
2521 /*
2522 * Notify the driver that the rport is now dead. The LLDD will
2523 * also guarantee that any communication to the rport is terminated
2524 *
2525 * Avoid this call if we already called it when we preserved the
2526 * rport for the binding.
2527 */
2528 spin_lock_irqsave(shost->host_lock, flags);
2529 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2530 (i->f->dev_loss_tmo_callbk)) {
2531 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2532 do_callback = 1;
2533 }
2534 spin_unlock_irqrestore(shost->host_lock, flags);
2535
2536 if (do_callback)
2537 i->f->dev_loss_tmo_callbk(rport);
2538
2539 fc_bsg_remove(rport->rqst_q);
2540
2541 transport_remove_device(dev);
2542 device_del(dev);
2543 transport_destroy_device(dev);
2544 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2545 put_device(dev); /* for self-reference */
2546}
2547
2548
2549/**
2550 * fc_rport_create - allocates and creates a remote FC port.
2551 * @shost: scsi host the remote port is connected to.
2552 * @channel: Channel on shost port connected to.
2553 * @ids: The world wide names, fc address, and FC4 port
2554 * roles for the remote port.
2555 *
2556 * Allocates and creates the remoter port structure, including the
2557 * class and sysfs creation.
2558 *
2559 * Notes:
2560 * This routine assumes no locks are held on entry.
2561 */
2562static struct fc_rport *
2563fc_rport_create(struct Scsi_Host *shost, int channel,
2564 struct fc_rport_identifiers *ids)
2565{
2566 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2567 struct fc_internal *fci = to_fc_internal(shost->transportt);
2568 struct fc_rport *rport;
2569 struct device *dev;
2570 unsigned long flags;
2571 int error;
2572 size_t size;
2573
2574 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2575 rport = kzalloc(size, GFP_KERNEL);
2576 if (unlikely(!rport)) {
2577 printk(KERN_ERR "%s: allocation failure\n", __func__);
2578 return NULL;
2579 }
2580
2581 rport->maxframe_size = -1;
2582 rport->supported_classes = FC_COS_UNSPECIFIED;
2583 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2584 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2585 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2586 rport->port_id = ids->port_id;
2587 rport->roles = ids->roles;
2588 rport->port_state = FC_PORTSTATE_ONLINE;
2589 if (fci->f->dd_fcrport_size)
2590 rport->dd_data = &rport[1];
2591 rport->channel = channel;
2592 rport->fast_io_fail_tmo = -1;
2593
2594 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2595 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2596 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2597 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2598 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2599
2600 spin_lock_irqsave(shost->host_lock, flags);
2601
2602 rport->number = fc_host->next_rport_number++;
2603 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2604 rport->scsi_target_id = fc_host->next_target_id++;
2605 else
2606 rport->scsi_target_id = -1;
2607 list_add_tail(&rport->peers, &fc_host->rports);
2608 get_device(&shost->shost_gendev); /* for fc_host->rport list */
2609
2610 spin_unlock_irqrestore(shost->host_lock, flags);
2611
2612 dev = &rport->dev;
2613 device_initialize(dev); /* takes self reference */
2614 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2615 dev->release = fc_rport_dev_release;
2616 dev_set_name(dev, "rport-%d:%d-%d",
2617 shost->host_no, channel, rport->number);
2618 transport_setup_device(dev);
2619
2620 error = device_add(dev);
2621 if (error) {
2622 printk(KERN_ERR "FC Remote Port device_add failed\n");
2623 goto delete_rport;
2624 }
2625 transport_add_device(dev);
2626 transport_configure_device(dev);
2627
2628 fc_bsg_rportadd(shost, rport);
2629 /* ignore any bsg add error - we just can't do sgio */
2630
2631 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2632 /* initiate a scan of the target */
2633 rport->flags |= FC_RPORT_SCAN_PENDING;
2634 scsi_queue_work(shost, &rport->scan_work);
2635 }
2636
2637 return rport;
2638
2639delete_rport:
2640 transport_destroy_device(dev);
2641 spin_lock_irqsave(shost->host_lock, flags);
2642 list_del(&rport->peers);
2643 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2644 spin_unlock_irqrestore(shost->host_lock, flags);
2645 put_device(dev->parent);
2646 kfree(rport);
2647 return NULL;
2648}
2649
2650/**
2651 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2652 * @shost: scsi host the remote port is connected to.
2653 * @channel: Channel on shost port connected to.
2654 * @ids: The world wide names, fc address, and FC4 port
2655 * roles for the remote port.
2656 *
2657 * The LLDD calls this routine to notify the transport of the existence
2658 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2659 * of the port, it's FC address (port_id), and the FC4 roles that are
2660 * active for the port.
2661 *
2662 * For ports that are FCP targets (aka scsi targets), the FC transport
2663 * maintains consistent target id bindings on behalf of the LLDD.
2664 * A consistent target id binding is an assignment of a target id to
2665 * a remote port identifier, which persists while the scsi host is
2666 * attached. The remote port can disappear, then later reappear, and
2667 * it's target id assignment remains the same. This allows for shifts
2668 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2669 * changes to the scsi subsystem which is based on scsi host number and
2670 * target id values. Bindings are only valid during the attachment of
2671 * the scsi host. If the host detaches, then later re-attaches, target
2672 * id bindings may change.
2673 *
2674 * This routine is responsible for returning a remote port structure.
2675 * The routine will search the list of remote ports it maintains
2676 * internally on behalf of consistent target id mappings. If found, the
2677 * remote port structure will be reused. Otherwise, a new remote port
2678 * structure will be allocated.
2679 *
2680 * Whenever a remote port is allocated, a new fc_remote_port class
2681 * device is created.
2682 *
2683 * Should not be called from interrupt context.
2684 *
2685 * Notes:
2686 * This routine assumes no locks are held on entry.
2687 */
2688struct fc_rport *
2689fc_remote_port_add(struct Scsi_Host *shost, int channel,
2690 struct fc_rport_identifiers *ids)
2691{
2692 struct fc_internal *fci = to_fc_internal(shost->transportt);
2693 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2694 struct fc_rport *rport;
2695 unsigned long flags;
2696 int match = 0;
2697
2698 /* ensure any stgt delete functions are done */
2699 fc_flush_work(shost);
2700
2701 /*
2702 * Search the list of "active" rports, for an rport that has been
2703 * deleted, but we've held off the real delete while the target
2704 * is in a "blocked" state.
2705 */
2706 spin_lock_irqsave(shost->host_lock, flags);
2707
2708 list_for_each_entry(rport, &fc_host->rports, peers) {
2709
2710 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2711 (rport->channel == channel)) {
2712
2713 switch (fc_host->tgtid_bind_type) {
2714 case FC_TGTID_BIND_BY_WWPN:
2715 case FC_TGTID_BIND_NONE:
2716 if (rport->port_name == ids->port_name)
2717 match = 1;
2718 break;
2719 case FC_TGTID_BIND_BY_WWNN:
2720 if (rport->node_name == ids->node_name)
2721 match = 1;
2722 break;
2723 case FC_TGTID_BIND_BY_ID:
2724 if (rport->port_id == ids->port_id)
2725 match = 1;
2726 break;
2727 }
2728
2729 if (match) {
2730
2731 memcpy(&rport->node_name, &ids->node_name,
2732 sizeof(rport->node_name));
2733 memcpy(&rport->port_name, &ids->port_name,
2734 sizeof(rport->port_name));
2735 rport->port_id = ids->port_id;
2736
2737 rport->port_state = FC_PORTSTATE_ONLINE;
2738 rport->roles = ids->roles;
2739
2740 spin_unlock_irqrestore(shost->host_lock, flags);
2741
2742 if (fci->f->dd_fcrport_size)
2743 memset(rport->dd_data, 0,
2744 fci->f->dd_fcrport_size);
2745
2746 /*
2747 * If we were not a target, cancel the
2748 * io terminate and rport timers, and
2749 * we're done.
2750 *
2751 * If we were a target, but our new role
2752 * doesn't indicate a target, leave the
2753 * timers running expecting the role to
2754 * change as the target fully logs in. If
2755 * it doesn't, the target will be torn down.
2756 *
2757 * If we were a target, and our role shows
2758 * we're still a target, cancel the timers
2759 * and kick off a scan.
2760 */
2761
2762 /* was a target, not in roles */
2763 if ((rport->scsi_target_id != -1) &&
2764 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2765 return rport;
2766
2767 /*
2768 * Stop the fail io and dev_loss timers.
2769 * If they flush, the port_state will
2770 * be checked and will NOOP the function.
2771 */
2772 if (!cancel_delayed_work(&rport->fail_io_work))
2773 fc_flush_devloss(shost);
2774 if (!cancel_delayed_work(&rport->dev_loss_work))
2775 fc_flush_devloss(shost);
2776
2777 spin_lock_irqsave(shost->host_lock, flags);
2778
2779 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2780 FC_RPORT_DEVLOSS_PENDING |
2781 FC_RPORT_DEVLOSS_CALLBK_DONE);
2782
2783 /* if target, initiate a scan */
2784 if (rport->scsi_target_id != -1) {
2785 rport->flags |= FC_RPORT_SCAN_PENDING;
2786 scsi_queue_work(shost,
2787 &rport->scan_work);
2788 spin_unlock_irqrestore(shost->host_lock,
2789 flags);
2790 scsi_target_unblock(&rport->dev);
2791 } else
2792 spin_unlock_irqrestore(shost->host_lock,
2793 flags);
2794
2795 fc_bsg_goose_queue(rport);
2796
2797 return rport;
2798 }
2799 }
2800 }
2801
2802 /*
2803 * Search the bindings array
2804 * Note: if never a FCP target, you won't be on this list
2805 */
2806 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2807
2808 /* search for a matching consistent binding */
2809
2810 list_for_each_entry(rport, &fc_host->rport_bindings,
2811 peers) {
2812 if (rport->channel != channel)
2813 continue;
2814
2815 switch (fc_host->tgtid_bind_type) {
2816 case FC_TGTID_BIND_BY_WWPN:
2817 if (rport->port_name == ids->port_name)
2818 match = 1;
2819 break;
2820 case FC_TGTID_BIND_BY_WWNN:
2821 if (rport->node_name == ids->node_name)
2822 match = 1;
2823 break;
2824 case FC_TGTID_BIND_BY_ID:
2825 if (rport->port_id == ids->port_id)
2826 match = 1;
2827 break;
2828 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2829 break;
2830 }
2831
2832 if (match) {
2833 list_move_tail(&rport->peers, &fc_host->rports);
2834 break;
2835 }
2836 }
2837
2838 if (match) {
2839 memcpy(&rport->node_name, &ids->node_name,
2840 sizeof(rport->node_name));
2841 memcpy(&rport->port_name, &ids->port_name,
2842 sizeof(rport->port_name));
2843 rport->port_id = ids->port_id;
2844 rport->roles = ids->roles;
2845 rport->port_state = FC_PORTSTATE_ONLINE;
2846 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2847
2848 if (fci->f->dd_fcrport_size)
2849 memset(rport->dd_data, 0,
2850 fci->f->dd_fcrport_size);
2851
2852 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2853 /* initiate a scan of the target */
2854 rport->flags |= FC_RPORT_SCAN_PENDING;
2855 scsi_queue_work(shost, &rport->scan_work);
2856 spin_unlock_irqrestore(shost->host_lock, flags);
2857 scsi_target_unblock(&rport->dev);
2858 } else
2859 spin_unlock_irqrestore(shost->host_lock, flags);
2860
2861 return rport;
2862 }
2863 }
2864
2865 spin_unlock_irqrestore(shost->host_lock, flags);
2866
2867 /* No consistent binding found - create new remote port entry */
2868 rport = fc_rport_create(shost, channel, ids);
2869
2870 return rport;
2871}
2872EXPORT_SYMBOL(fc_remote_port_add);
2873
2874
2875/**
2876 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2877 * @rport: The remote port that no longer exists
2878 *
2879 * The LLDD calls this routine to notify the transport that a remote
2880 * port is no longer part of the topology. Note: Although a port
2881 * may no longer be part of the topology, it may persist in the remote
2882 * ports displayed by the fc_host. We do this under 2 conditions:
2883 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2884 * This allows the port to temporarily disappear, then reappear without
2885 * disrupting the SCSI device tree attached to it. During the "blocked"
2886 * period the port will still exist.
2887 * 2) If the port was a scsi target and disappears for longer than we
2888 * expect, we'll delete the port and the tear down the SCSI device tree
2889 * attached to it. However, we want to semi-persist the target id assigned
2890 * to that port if it eventually does exist. The port structure will
2891 * remain (although with minimal information) so that the target id
2892 * bindings remails.
2893 *
2894 * If the remote port is not an FCP Target, it will be fully torn down
2895 * and deallocated, including the fc_remote_port class device.
2896 *
2897 * If the remote port is an FCP Target, the port will be placed in a
2898 * temporary blocked state. From the LLDD's perspective, the rport no
2899 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2900 * exists, but all sdevs on it are blocked from further I/O. The following
2901 * is then expected.
2902 *
2903 * If the remote port does not return (signaled by a LLDD call to
2904 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2905 * scsi target is removed - killing all outstanding i/o and removing the
2906 * scsi devices attached ot it. The port structure will be marked Not
2907 * Present and be partially cleared, leaving only enough information to
2908 * recognize the remote port relative to the scsi target id binding if
2909 * it later appears. The port will remain as long as there is a valid
2910 * binding (e.g. until the user changes the binding type or unloads the
2911 * scsi host with the binding).
2912 *
2913 * If the remote port returns within the dev_loss_tmo value (and matches
2914 * according to the target id binding type), the port structure will be
2915 * reused. If it is no longer a SCSI target, the target will be torn
2916 * down. If it continues to be a SCSI target, then the target will be
2917 * unblocked (allowing i/o to be resumed), and a scan will be activated
2918 * to ensure that all luns are detected.
2919 *
2920 * Called from normal process context only - cannot be called from interrupt.
2921 *
2922 * Notes:
2923 * This routine assumes no locks are held on entry.
2924 */
2925void
2926fc_remote_port_delete(struct fc_rport *rport)
2927{
2928 struct Scsi_Host *shost = rport_to_shost(rport);
2929 unsigned long timeout = rport->dev_loss_tmo;
2930 unsigned long flags;
2931
2932 /*
2933 * No need to flush the fc_host work_q's, as all adds are synchronous.
2934 *
2935 * We do need to reclaim the rport scan work element, so eventually
2936 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2937 * there's still a scan pending.
2938 */
2939
2940 spin_lock_irqsave(shost->host_lock, flags);
2941
2942 if (rport->port_state != FC_PORTSTATE_ONLINE) {
2943 spin_unlock_irqrestore(shost->host_lock, flags);
2944 return;
2945 }
2946
2947 /*
2948 * In the past, we if this was not an FCP-Target, we would
2949 * unconditionally just jump to deleting the rport.
2950 * However, rports can be used as node containers by the LLDD,
2951 * and its not appropriate to just terminate the rport at the
2952 * first sign of a loss in connectivity. The LLDD may want to
2953 * send ELS traffic to re-validate the login. If the rport is
2954 * immediately deleted, it makes it inappropriate for a node
2955 * container.
2956 * So... we now unconditionally wait dev_loss_tmo before
2957 * destroying an rport.
2958 */
2959
2960 rport->port_state = FC_PORTSTATE_BLOCKED;
2961
2962 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2963
2964 spin_unlock_irqrestore(shost->host_lock, flags);
2965
2966 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
2967 shost->active_mode & MODE_TARGET)
2968 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
2969
2970 scsi_target_block(&rport->dev);
2971
2972 /* see if we need to kill io faster than waiting for device loss */
2973 if ((rport->fast_io_fail_tmo != -1) &&
2974 (rport->fast_io_fail_tmo < timeout))
2975 fc_queue_devloss_work(shost, &rport->fail_io_work,
2976 rport->fast_io_fail_tmo * HZ);
2977
2978 /* cap the length the devices can be blocked until they are deleted */
2979 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
2980}
2981EXPORT_SYMBOL(fc_remote_port_delete);
2982
2983/**
2984 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
2985 * @rport: The remote port that changed.
2986 * @roles: New roles for this port.
2987 *
2988 * Description: The LLDD calls this routine to notify the transport that the
2989 * roles on a remote port may have changed. The largest effect of this is
2990 * if a port now becomes a FCP Target, it must be allocated a
2991 * scsi target id. If the port is no longer a FCP target, any
2992 * scsi target id value assigned to it will persist in case the
2993 * role changes back to include FCP Target. No changes in the scsi
2994 * midlayer will be invoked if the role changes (in the expectation
2995 * that the role will be resumed. If it doesn't normal error processing
2996 * will take place).
2997 *
2998 * Should not be called from interrupt context.
2999 *
3000 * Notes:
3001 * This routine assumes no locks are held on entry.
3002 */
3003void
3004fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3005{
3006 struct Scsi_Host *shost = rport_to_shost(rport);
3007 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3008 unsigned long flags;
3009 int create = 0;
3010 int ret;
3011
3012 spin_lock_irqsave(shost->host_lock, flags);
3013 if (roles & FC_PORT_ROLE_FCP_TARGET) {
3014 if (rport->scsi_target_id == -1) {
3015 rport->scsi_target_id = fc_host->next_target_id++;
3016 create = 1;
3017 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3018 create = 1;
3019 } else if (shost->active_mode & MODE_TARGET) {
3020 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
3021 (char *)&rport->node_name);
3022 if (ret)
3023 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
3024 ret);
3025 }
3026
3027 rport->roles = roles;
3028
3029 spin_unlock_irqrestore(shost->host_lock, flags);
3030
3031 if (create) {
3032 /*
3033 * There may have been a delete timer running on the
3034 * port. Ensure that it is cancelled as we now know
3035 * the port is an FCP Target.
3036 * Note: we know the rport is exists and in an online
3037 * state as the LLDD would not have had an rport
3038 * reference to pass us.
3039 *
3040 * Take no action on the del_timer failure as the state
3041 * machine state change will validate the
3042 * transaction.
3043 */
3044 if (!cancel_delayed_work(&rport->fail_io_work))
3045 fc_flush_devloss(shost);
3046 if (!cancel_delayed_work(&rport->dev_loss_work))
3047 fc_flush_devloss(shost);
3048
3049 spin_lock_irqsave(shost->host_lock, flags);
3050 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3051 FC_RPORT_DEVLOSS_PENDING);
3052 spin_unlock_irqrestore(shost->host_lock, flags);
3053
3054 /* ensure any stgt delete functions are done */
3055 fc_flush_work(shost);
3056
3057 /* initiate a scan of the target */
3058 spin_lock_irqsave(shost->host_lock, flags);
3059 rport->flags |= FC_RPORT_SCAN_PENDING;
3060 scsi_queue_work(shost, &rport->scan_work);
3061 spin_unlock_irqrestore(shost->host_lock, flags);
3062 scsi_target_unblock(&rport->dev);
3063 }
3064}
3065EXPORT_SYMBOL(fc_remote_port_rolechg);
3066
3067/**
3068 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3069 * @work: rport target that failed to reappear in the allotted time.
3070 *
3071 * Description: An attempt to delete a remote port blocks, and if it fails
3072 * to return in the allotted time this gets called.
3073 */
3074static void
3075fc_timeout_deleted_rport(struct work_struct *work)
3076{
3077 struct fc_rport *rport =
3078 container_of(work, struct fc_rport, dev_loss_work.work);
3079 struct Scsi_Host *shost = rport_to_shost(rport);
3080 struct fc_internal *i = to_fc_internal(shost->transportt);
3081 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3082 unsigned long flags;
3083 int do_callback = 0;
3084
3085 spin_lock_irqsave(shost->host_lock, flags);
3086
3087 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3088
3089 /*
3090 * If the port is ONLINE, then it came back. If it was a SCSI
3091 * target, validate it still is. If not, tear down the
3092 * scsi_target on it.
3093 */
3094 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3095 (rport->scsi_target_id != -1) &&
3096 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3097 dev_printk(KERN_ERR, &rport->dev,
3098 "blocked FC remote port time out: no longer"
3099 " a FCP target, removing starget\n");
3100 spin_unlock_irqrestore(shost->host_lock, flags);
3101 scsi_target_unblock(&rport->dev);
3102 fc_queue_work(shost, &rport->stgt_delete_work);
3103 return;
3104 }
3105
3106 /* NOOP state - we're flushing workq's */
3107 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3108 spin_unlock_irqrestore(shost->host_lock, flags);
3109 dev_printk(KERN_ERR, &rport->dev,
3110 "blocked FC remote port time out: leaving"
3111 " rport%s alone\n",
3112 (rport->scsi_target_id != -1) ? " and starget" : "");
3113 return;
3114 }
3115
3116 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3117 (rport->scsi_target_id == -1)) {
3118 list_del(&rport->peers);
3119 rport->port_state = FC_PORTSTATE_DELETED;
3120 dev_printk(KERN_ERR, &rport->dev,
3121 "blocked FC remote port time out: removing"
3122 " rport%s\n",
3123 (rport->scsi_target_id != -1) ? " and starget" : "");
3124 fc_queue_work(shost, &rport->rport_delete_work);
3125 spin_unlock_irqrestore(shost->host_lock, flags);
3126 return;
3127 }
3128
3129 dev_printk(KERN_ERR, &rport->dev,
3130 "blocked FC remote port time out: removing target and "
3131 "saving binding\n");
3132
3133 list_move_tail(&rport->peers, &fc_host->rport_bindings);
3134
3135 /*
3136 * Note: We do not remove or clear the hostdata area. This allows
3137 * host-specific target data to persist along with the
3138 * scsi_target_id. It's up to the host to manage it's hostdata area.
3139 */
3140
3141 /*
3142 * Reinitialize port attributes that may change if the port comes back.
3143 */
3144 rport->maxframe_size = -1;
3145 rport->supported_classes = FC_COS_UNSPECIFIED;
3146 rport->roles = FC_PORT_ROLE_UNKNOWN;
3147 rport->port_state = FC_PORTSTATE_NOTPRESENT;
3148 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3149
3150 /*
3151 * Pre-emptively kill I/O rather than waiting for the work queue
3152 * item to teardown the starget. (FCOE libFC folks prefer this
3153 * and to have the rport_port_id still set when it's done).
3154 */
3155 spin_unlock_irqrestore(shost->host_lock, flags);
3156 fc_terminate_rport_io(rport);
3157
3158 spin_lock_irqsave(shost->host_lock, flags);
3159
3160 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3161
3162 /* remove the identifiers that aren't used in the consisting binding */
3163 switch (fc_host->tgtid_bind_type) {
3164 case FC_TGTID_BIND_BY_WWPN:
3165 rport->node_name = -1;
3166 rport->port_id = -1;
3167 break;
3168 case FC_TGTID_BIND_BY_WWNN:
3169 rport->port_name = -1;
3170 rport->port_id = -1;
3171 break;
3172 case FC_TGTID_BIND_BY_ID:
3173 rport->node_name = -1;
3174 rport->port_name = -1;
3175 break;
3176 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3177 break;
3178 }
3179
3180 /*
3181 * As this only occurs if the remote port (scsi target)
3182 * went away and didn't come back - we'll remove
3183 * all attached scsi devices.
3184 */
3185 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3186 fc_queue_work(shost, &rport->stgt_delete_work);
3187
3188 do_callback = 1;
3189 }
3190
3191 spin_unlock_irqrestore(shost->host_lock, flags);
3192
3193 /*
3194 * Notify the driver that the rport is now dead. The LLDD will
3195 * also guarantee that any communication to the rport is terminated
3196 *
3197 * Note: we set the CALLBK_DONE flag above to correspond
3198 */
3199 if (do_callback && i->f->dev_loss_tmo_callbk)
3200 i->f->dev_loss_tmo_callbk(rport);
3201}
3202
3203
3204/**
3205 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3206 * @work: rport to terminate io on.
3207 *
3208 * Notes: Only requests the failure of the io, not that all are flushed
3209 * prior to returning.
3210 */
3211static void
3212fc_timeout_fail_rport_io(struct work_struct *work)
3213{
3214 struct fc_rport *rport =
3215 container_of(work, struct fc_rport, fail_io_work.work);
3216
3217 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3218 return;
3219
3220 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3221 fc_terminate_rport_io(rport);
3222}
3223
3224/**
3225 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3226 * @work: remote port to be scanned.
3227 */
3228static void
3229fc_scsi_scan_rport(struct work_struct *work)
3230{
3231 struct fc_rport *rport =
3232 container_of(work, struct fc_rport, scan_work);
3233 struct Scsi_Host *shost = rport_to_shost(rport);
3234 struct fc_internal *i = to_fc_internal(shost->transportt);
3235 unsigned long flags;
3236
3237 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3238 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3239 !(i->f->disable_target_scan)) {
3240 scsi_scan_target(&rport->dev, rport->channel,
3241 rport->scsi_target_id, SCAN_WILD_CARD, 1);
3242 }
3243
3244 spin_lock_irqsave(shost->host_lock, flags);
3245 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3246 spin_unlock_irqrestore(shost->host_lock, flags);
3247}
3248
3249/**
3250 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3251 * @cmnd: SCSI command that scsi_eh is trying to recover
3252 *
3253 * This routine can be called from a FC LLD scsi_eh callback. It
3254 * blocks the scsi_eh thread until the fc_rport leaves the
3255 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3256 * necessary to avoid the scsi_eh failing recovery actions for blocked
3257 * rports which would lead to offlined SCSI devices.
3258 *
3259 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3260 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3261 * passed back to scsi_eh.
3262 */
3263int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3264{
3265 struct Scsi_Host *shost = cmnd->device->host;
3266 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3267 unsigned long flags;
3268
3269 spin_lock_irqsave(shost->host_lock, flags);
3270 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3271 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3272 spin_unlock_irqrestore(shost->host_lock, flags);
3273 msleep(1000);
3274 spin_lock_irqsave(shost->host_lock, flags);
3275 }
3276 spin_unlock_irqrestore(shost->host_lock, flags);
3277
3278 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3279 return FAST_IO_FAIL;
3280
3281 return 0;
3282}
3283EXPORT_SYMBOL(fc_block_scsi_eh);
3284
3285/**
3286 * fc_vport_setup - allocates and creates a FC virtual port.
3287 * @shost: scsi host the virtual port is connected to.
3288 * @channel: Channel on shost port connected to.
3289 * @pdev: parent device for vport
3290 * @ids: The world wide names, FC4 port roles, etc for
3291 * the virtual port.
3292 * @ret_vport: The pointer to the created vport.
3293 *
3294 * Allocates and creates the vport structure, calls the parent host
3295 * to instantiate the vport, the completes w/ class and sysfs creation.
3296 *
3297 * Notes:
3298 * This routine assumes no locks are held on entry.
3299 */
3300static int
3301fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3302 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3303{
3304 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3305 struct fc_internal *fci = to_fc_internal(shost->transportt);
3306 struct fc_vport *vport;
3307 struct device *dev;
3308 unsigned long flags;
3309 size_t size;
3310 int error;
3311
3312 *ret_vport = NULL;
3313
3314 if ( ! fci->f->vport_create)
3315 return -ENOENT;
3316
3317 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3318 vport = kzalloc(size, GFP_KERNEL);
3319 if (unlikely(!vport)) {
3320 printk(KERN_ERR "%s: allocation failure\n", __func__);
3321 return -ENOMEM;
3322 }
3323
3324 vport->vport_state = FC_VPORT_UNKNOWN;
3325 vport->vport_last_state = FC_VPORT_UNKNOWN;
3326 vport->node_name = ids->node_name;
3327 vport->port_name = ids->port_name;
3328 vport->roles = ids->roles;
3329 vport->vport_type = ids->vport_type;
3330 if (fci->f->dd_fcvport_size)
3331 vport->dd_data = &vport[1];
3332 vport->shost = shost;
3333 vport->channel = channel;
3334 vport->flags = FC_VPORT_CREATING;
3335 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3336
3337 spin_lock_irqsave(shost->host_lock, flags);
3338
3339 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3340 spin_unlock_irqrestore(shost->host_lock, flags);
3341 kfree(vport);
3342 return -ENOSPC;
3343 }
3344 fc_host->npiv_vports_inuse++;
3345 vport->number = fc_host->next_vport_number++;
3346 list_add_tail(&vport->peers, &fc_host->vports);
3347 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3348
3349 spin_unlock_irqrestore(shost->host_lock, flags);
3350
3351 dev = &vport->dev;
3352 device_initialize(dev); /* takes self reference */
3353 dev->parent = get_device(pdev); /* takes parent reference */
3354 dev->release = fc_vport_dev_release;
3355 dev_set_name(dev, "vport-%d:%d-%d",
3356 shost->host_no, channel, vport->number);
3357 transport_setup_device(dev);
3358
3359 error = device_add(dev);
3360 if (error) {
3361 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3362 goto delete_vport;
3363 }
3364 transport_add_device(dev);
3365 transport_configure_device(dev);
3366
3367 error = fci->f->vport_create(vport, ids->disable);
3368 if (error) {
3369 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3370 goto delete_vport_all;
3371 }
3372
3373 /*
3374 * if the parent isn't the physical adapter's Scsi_Host, ensure
3375 * the Scsi_Host at least contains ia symlink to the vport.
3376 */
3377 if (pdev != &shost->shost_gendev) {
3378 error = sysfs_create_link(&shost->shost_gendev.kobj,
3379 &dev->kobj, dev_name(dev));
3380 if (error)
3381 printk(KERN_ERR
3382 "%s: Cannot create vport symlinks for "
3383 "%s, err=%d\n",
3384 __func__, dev_name(dev), error);
3385 }
3386 spin_lock_irqsave(shost->host_lock, flags);
3387 vport->flags &= ~FC_VPORT_CREATING;
3388 spin_unlock_irqrestore(shost->host_lock, flags);
3389
3390 dev_printk(KERN_NOTICE, pdev,
3391 "%s created via shost%d channel %d\n", dev_name(dev),
3392 shost->host_no, channel);
3393
3394 *ret_vport = vport;
3395
3396 return 0;
3397
3398delete_vport_all:
3399 transport_remove_device(dev);
3400 device_del(dev);
3401delete_vport:
3402 transport_destroy_device(dev);
3403 spin_lock_irqsave(shost->host_lock, flags);
3404 list_del(&vport->peers);
3405 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3406 fc_host->npiv_vports_inuse--;
3407 spin_unlock_irqrestore(shost->host_lock, flags);
3408 put_device(dev->parent);
3409 kfree(vport);
3410
3411 return error;
3412}
3413
3414/**
3415 * fc_vport_create - Admin App or LLDD requests creation of a vport
3416 * @shost: scsi host the virtual port is connected to.
3417 * @channel: channel on shost port connected to.
3418 * @ids: The world wide names, FC4 port roles, etc for
3419 * the virtual port.
3420 *
3421 * Notes:
3422 * This routine assumes no locks are held on entry.
3423 */
3424struct fc_vport *
3425fc_vport_create(struct Scsi_Host *shost, int channel,
3426 struct fc_vport_identifiers *ids)
3427{
3428 int stat;
3429 struct fc_vport *vport;
3430
3431 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3432 ids, &vport);
3433 return stat ? NULL : vport;
3434}
3435EXPORT_SYMBOL(fc_vport_create);
3436
3437/**
3438 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3439 * @vport: fc_vport to be terminated
3440 *
3441 * Calls the LLDD vport_delete() function, then deallocates and removes
3442 * the vport from the shost and object tree.
3443 *
3444 * Notes:
3445 * This routine assumes no locks are held on entry.
3446 */
3447int
3448fc_vport_terminate(struct fc_vport *vport)
3449{
3450 struct Scsi_Host *shost = vport_to_shost(vport);
3451 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3452 struct fc_internal *i = to_fc_internal(shost->transportt);
3453 struct device *dev = &vport->dev;
3454 unsigned long flags;
3455 int stat;
3456
3457 if (i->f->vport_delete)
3458 stat = i->f->vport_delete(vport);
3459 else
3460 stat = -ENOENT;
3461
3462 spin_lock_irqsave(shost->host_lock, flags);
3463 vport->flags &= ~FC_VPORT_DELETING;
3464 if (!stat) {
3465 vport->flags |= FC_VPORT_DELETED;
3466 list_del(&vport->peers);
3467 fc_host->npiv_vports_inuse--;
3468 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3469 }
3470 spin_unlock_irqrestore(shost->host_lock, flags);
3471
3472 if (stat)
3473 return stat;
3474
3475 if (dev->parent != &shost->shost_gendev)
3476 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3477 transport_remove_device(dev);
3478 device_del(dev);
3479 transport_destroy_device(dev);
3480
3481 /*
3482 * Removing our self-reference should mean our
3483 * release function gets called, which will drop the remaining
3484 * parent reference and free the data structure.
3485 */
3486 put_device(dev); /* for self-reference */
3487
3488 return 0; /* SUCCESS */
3489}
3490EXPORT_SYMBOL(fc_vport_terminate);
3491
3492/**
3493 * fc_vport_sched_delete - workq-based delete request for a vport
3494 * @work: vport to be deleted.
3495 */
3496static void
3497fc_vport_sched_delete(struct work_struct *work)
3498{
3499 struct fc_vport *vport =
3500 container_of(work, struct fc_vport, vport_delete_work);
3501 int stat;
3502
3503 stat = fc_vport_terminate(vport);
3504 if (stat)
3505 dev_printk(KERN_ERR, vport->dev.parent,
3506 "%s: %s could not be deleted created via "
3507 "shost%d channel %d - error %d\n", __func__,
3508 dev_name(&vport->dev), vport->shost->host_no,
3509 vport->channel, stat);
3510}
3511
3512
3513/*
3514 * BSG support
3515 */
3516
3517
3518/**
3519 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3520 * @job: fc_bsg_job that is to be torn down
3521 */
3522static void
3523fc_destroy_bsgjob(struct fc_bsg_job *job)
3524{
3525 unsigned long flags;
3526
3527 spin_lock_irqsave(&job->job_lock, flags);
3528 if (job->ref_cnt) {
3529 spin_unlock_irqrestore(&job->job_lock, flags);
3530 return;
3531 }
3532 spin_unlock_irqrestore(&job->job_lock, flags);
3533
3534 put_device(job->dev); /* release reference for the request */
3535
3536 kfree(job->request_payload.sg_list);
3537 kfree(job->reply_payload.sg_list);
3538 kfree(job);
3539}
3540
3541/**
3542 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3543 * completed
3544 * @job: fc_bsg_job that is complete
3545 */
3546static void
3547fc_bsg_jobdone(struct fc_bsg_job *job)
3548{
3549 struct request *req = job->req;
3550 struct request *rsp = req->next_rq;
3551 int err;
3552
3553 err = job->req->errors = job->reply->result;
3554
3555 if (err < 0)
3556 /* we're only returning the result field in the reply */
3557 job->req->sense_len = sizeof(uint32_t);
3558 else
3559 job->req->sense_len = job->reply_len;
3560
3561 /* we assume all request payload was transferred, residual == 0 */
3562 req->resid_len = 0;
3563
3564 if (rsp) {
3565 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3566
3567 /* set reply (bidi) residual */
3568 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3569 rsp->resid_len);
3570 }
3571 blk_complete_request(req);
3572}
3573
3574/**
3575 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3576 * @rq: BSG request that holds the job to be destroyed
3577 */
3578static void fc_bsg_softirq_done(struct request *rq)
3579{
3580 struct fc_bsg_job *job = rq->special;
3581 unsigned long flags;
3582
3583 spin_lock_irqsave(&job->job_lock, flags);
3584 job->state_flags |= FC_RQST_STATE_DONE;
3585 job->ref_cnt--;
3586 spin_unlock_irqrestore(&job->job_lock, flags);
3587
3588 blk_end_request_all(rq, rq->errors);
3589 fc_destroy_bsgjob(job);
3590}
3591
3592/**
3593 * fc_bsg_job_timeout - handler for when a bsg request timesout
3594 * @req: request that timed out
3595 */
3596static enum blk_eh_timer_return
3597fc_bsg_job_timeout(struct request *req)
3598{
3599 struct fc_bsg_job *job = (void *) req->special;
3600 struct Scsi_Host *shost = job->shost;
3601 struct fc_internal *i = to_fc_internal(shost->transportt);
3602 unsigned long flags;
3603 int err = 0, done = 0;
3604
3605 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3606 return BLK_EH_RESET_TIMER;
3607
3608 spin_lock_irqsave(&job->job_lock, flags);
3609 if (job->state_flags & FC_RQST_STATE_DONE)
3610 done = 1;
3611 else
3612 job->ref_cnt++;
3613 spin_unlock_irqrestore(&job->job_lock, flags);
3614
3615 if (!done && i->f->bsg_timeout) {
3616 /* call LLDD to abort the i/o as it has timed out */
3617 err = i->f->bsg_timeout(job);
3618 if (err == -EAGAIN) {
3619 job->ref_cnt--;
3620 return BLK_EH_RESET_TIMER;
3621 } else if (err)
3622 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3623 "abort failed with status %d\n", err);
3624 }
3625
3626 /* the blk_end_sync_io() doesn't check the error */
3627 if (done)
3628 return BLK_EH_NOT_HANDLED;
3629 else
3630 return BLK_EH_HANDLED;
3631}
3632
3633static int
3634fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3635{
3636 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3637
3638 BUG_ON(!req->nr_phys_segments);
3639
3640 buf->sg_list = kzalloc(sz, GFP_KERNEL);
3641 if (!buf->sg_list)
3642 return -ENOMEM;
3643 sg_init_table(buf->sg_list, req->nr_phys_segments);
3644 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3645 buf->payload_len = blk_rq_bytes(req);
3646 return 0;
3647}
3648
3649
3650/**
3651 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3652 * bsg request
3653 * @shost: SCSI Host corresponding to the bsg object
3654 * @rport: (optional) FC Remote Port corresponding to the bsg object
3655 * @req: BSG request that needs a job structure
3656 */
3657static int
3658fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3659 struct request *req)
3660{
3661 struct fc_internal *i = to_fc_internal(shost->transportt);
3662 struct request *rsp = req->next_rq;
3663 struct fc_bsg_job *job;
3664 int ret;
3665
3666 BUG_ON(req->special);
3667
3668 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3669 GFP_KERNEL);
3670 if (!job)
3671 return -ENOMEM;
3672
3673 /*
3674 * Note: this is a bit silly.
3675 * The request gets formatted as a SGIO v4 ioctl request, which
3676 * then gets reformatted as a blk request, which then gets
3677 * reformatted as a fc bsg request. And on completion, we have
3678 * to wrap return results such that SGIO v4 thinks it was a scsi
3679 * status. I hope this was all worth it.
3680 */
3681
3682 req->special = job;
3683 job->shost = shost;
3684 job->rport = rport;
3685 job->req = req;
3686 if (i->f->dd_bsg_size)
3687 job->dd_data = (void *)&job[1];
3688 spin_lock_init(&job->job_lock);
3689 job->request = (struct fc_bsg_request *)req->cmd;
3690 job->request_len = req->cmd_len;
3691 job->reply = req->sense;
3692 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3693 * allocated */
3694 if (req->bio) {
3695 ret = fc_bsg_map_buffer(&job->request_payload, req);
3696 if (ret)
3697 goto failjob_rls_job;
3698 }
3699 if (rsp && rsp->bio) {
3700 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3701 if (ret)
3702 goto failjob_rls_rqst_payload;
3703 }
3704 job->job_done = fc_bsg_jobdone;
3705 if (rport)
3706 job->dev = &rport->dev;
3707 else
3708 job->dev = &shost->shost_gendev;
3709 get_device(job->dev); /* take a reference for the request */
3710
3711 job->ref_cnt = 1;
3712
3713 return 0;
3714
3715
3716failjob_rls_rqst_payload:
3717 kfree(job->request_payload.sg_list);
3718failjob_rls_job:
3719 kfree(job);
3720 return -ENOMEM;
3721}
3722
3723
3724enum fc_dispatch_result {
3725 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
3726 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
3727 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
3728};
3729
3730
3731/**
3732 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3733 * @q: fc host request queue
3734 * @shost: scsi host rport attached to
3735 * @job: bsg job to be processed
3736 */
3737static enum fc_dispatch_result
3738fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3739 struct fc_bsg_job *job)
3740{
3741 struct fc_internal *i = to_fc_internal(shost->transportt);
3742 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3743 int ret;
3744
3745 /* Validate the host command */
3746 switch (job->request->msgcode) {
3747 case FC_BSG_HST_ADD_RPORT:
3748 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3749 break;
3750
3751 case FC_BSG_HST_DEL_RPORT:
3752 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3753 break;
3754
3755 case FC_BSG_HST_ELS_NOLOGIN:
3756 cmdlen += sizeof(struct fc_bsg_host_els);
3757 /* there better be a xmt and rcv payloads */
3758 if ((!job->request_payload.payload_len) ||
3759 (!job->reply_payload.payload_len)) {
3760 ret = -EINVAL;
3761 goto fail_host_msg;
3762 }
3763 break;
3764
3765 case FC_BSG_HST_CT:
3766 cmdlen += sizeof(struct fc_bsg_host_ct);
3767 /* there better be xmt and rcv payloads */
3768 if ((!job->request_payload.payload_len) ||
3769 (!job->reply_payload.payload_len)) {
3770 ret = -EINVAL;
3771 goto fail_host_msg;
3772 }
3773 break;
3774
3775 case FC_BSG_HST_VENDOR:
3776 cmdlen += sizeof(struct fc_bsg_host_vendor);
3777 if ((shost->hostt->vendor_id == 0L) ||
3778 (job->request->rqst_data.h_vendor.vendor_id !=
3779 shost->hostt->vendor_id)) {
3780 ret = -ESRCH;
3781 goto fail_host_msg;
3782 }
3783 break;
3784
3785 default:
3786 ret = -EBADR;
3787 goto fail_host_msg;
3788 }
3789
3790 /* check if we really have all the request data needed */
3791 if (job->request_len < cmdlen) {
3792 ret = -ENOMSG;
3793 goto fail_host_msg;
3794 }
3795
3796 ret = i->f->bsg_request(job);
3797 if (!ret)
3798 return FC_DISPATCH_UNLOCKED;
3799
3800fail_host_msg:
3801 /* return the errno failure code as the only status */
3802 BUG_ON(job->reply_len < sizeof(uint32_t));
3803 job->reply->reply_payload_rcv_len = 0;
3804 job->reply->result = ret;
3805 job->reply_len = sizeof(uint32_t);
3806 fc_bsg_jobdone(job);
3807 return FC_DISPATCH_UNLOCKED;
3808}
3809
3810
3811/*
3812 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3813 * @rport: rport to be restarted
3814 */
3815static void
3816fc_bsg_goose_queue(struct fc_rport *rport)
3817{
3818 if (!rport->rqst_q)
3819 return;
3820
3821 /*
3822 * This get/put dance makes no sense
3823 */
3824 get_device(&rport->dev);
3825 blk_run_queue_async(rport->rqst_q);
3826 put_device(&rport->dev);
3827}
3828
3829/**
3830 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3831 * @q: rport request queue
3832 * @shost: scsi host rport attached to
3833 * @rport: rport request destined to
3834 * @job: bsg job to be processed
3835 */
3836static enum fc_dispatch_result
3837fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3838 struct fc_rport *rport, struct fc_bsg_job *job)
3839{
3840 struct fc_internal *i = to_fc_internal(shost->transportt);
3841 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3842 int ret;
3843
3844 /* Validate the rport command */
3845 switch (job->request->msgcode) {
3846 case FC_BSG_RPT_ELS:
3847 cmdlen += sizeof(struct fc_bsg_rport_els);
3848 goto check_bidi;
3849
3850 case FC_BSG_RPT_CT:
3851 cmdlen += sizeof(struct fc_bsg_rport_ct);
3852check_bidi:
3853 /* there better be xmt and rcv payloads */
3854 if ((!job->request_payload.payload_len) ||
3855 (!job->reply_payload.payload_len)) {
3856 ret = -EINVAL;
3857 goto fail_rport_msg;
3858 }
3859 break;
3860 default:
3861 ret = -EBADR;
3862 goto fail_rport_msg;
3863 }
3864
3865 /* check if we really have all the request data needed */
3866 if (job->request_len < cmdlen) {
3867 ret = -ENOMSG;
3868 goto fail_rport_msg;
3869 }
3870
3871 ret = i->f->bsg_request(job);
3872 if (!ret)
3873 return FC_DISPATCH_UNLOCKED;
3874
3875fail_rport_msg:
3876 /* return the errno failure code as the only status */
3877 BUG_ON(job->reply_len < sizeof(uint32_t));
3878 job->reply->reply_payload_rcv_len = 0;
3879 job->reply->result = ret;
3880 job->reply_len = sizeof(uint32_t);
3881 fc_bsg_jobdone(job);
3882 return FC_DISPATCH_UNLOCKED;
3883}
3884
3885
3886/**
3887 * fc_bsg_request_handler - generic handler for bsg requests
3888 * @q: request queue to manage
3889 * @shost: Scsi_Host related to the bsg object
3890 * @rport: FC remote port related to the bsg object (optional)
3891 * @dev: device structure for bsg object
3892 */
3893static void
3894fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3895 struct fc_rport *rport, struct device *dev)
3896{
3897 struct request *req;
3898 struct fc_bsg_job *job;
3899 enum fc_dispatch_result ret;
3900
3901 if (!get_device(dev))
3902 return;
3903
3904 while (1) {
3905 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3906 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3907 break;
3908
3909 req = blk_fetch_request(q);
3910 if (!req)
3911 break;
3912
3913 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3914 req->errors = -ENXIO;
3915 spin_unlock_irq(q->queue_lock);
3916 blk_end_request_all(req, -ENXIO);
3917 spin_lock_irq(q->queue_lock);
3918 continue;
3919 }
3920
3921 spin_unlock_irq(q->queue_lock);
3922
3923 ret = fc_req_to_bsgjob(shost, rport, req);
3924 if (ret) {
3925 req->errors = ret;
3926 blk_end_request_all(req, ret);
3927 spin_lock_irq(q->queue_lock);
3928 continue;
3929 }
3930
3931 job = req->special;
3932
3933 /* check if we have the msgcode value at least */
3934 if (job->request_len < sizeof(uint32_t)) {
3935 BUG_ON(job->reply_len < sizeof(uint32_t));
3936 job->reply->reply_payload_rcv_len = 0;
3937 job->reply->result = -ENOMSG;
3938 job->reply_len = sizeof(uint32_t);
3939 fc_bsg_jobdone(job);
3940 spin_lock_irq(q->queue_lock);
3941 continue;
3942 }
3943
3944 /* the dispatch routines will unlock the queue_lock */
3945 if (rport)
3946 ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3947 else
3948 ret = fc_bsg_host_dispatch(q, shost, job);
3949
3950 /* did dispatcher hit state that can't process any more */
3951 if (ret == FC_DISPATCH_BREAK)
3952 break;
3953
3954 /* did dispatcher had released the lock */
3955 if (ret == FC_DISPATCH_UNLOCKED)
3956 spin_lock_irq(q->queue_lock);
3957 }
3958
3959 spin_unlock_irq(q->queue_lock);
3960 put_device(dev);
3961 spin_lock_irq(q->queue_lock);
3962}
3963
3964
3965/**
3966 * fc_bsg_host_handler - handler for bsg requests for a fc host
3967 * @q: fc host request queue
3968 */
3969static void
3970fc_bsg_host_handler(struct request_queue *q)
3971{
3972 struct Scsi_Host *shost = q->queuedata;
3973
3974 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
3975}
3976
3977
3978/**
3979 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
3980 * @q: rport request queue
3981 */
3982static void
3983fc_bsg_rport_handler(struct request_queue *q)
3984{
3985 struct fc_rport *rport = q->queuedata;
3986 struct Scsi_Host *shost = rport_to_shost(rport);
3987
3988 fc_bsg_request_handler(q, shost, rport, &rport->dev);
3989}
3990
3991
3992/**
3993 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3994 * @shost: shost for fc_host
3995 * @fc_host: fc_host adding the structures to
3996 */
3997static int
3998fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3999{
4000 struct device *dev = &shost->shost_gendev;
4001 struct fc_internal *i = to_fc_internal(shost->transportt);
4002 struct request_queue *q;
4003 int err;
4004 char bsg_name[20];
4005
4006 fc_host->rqst_q = NULL;
4007
4008 if (!i->f->bsg_request)
4009 return -ENOTSUPP;
4010
4011 snprintf(bsg_name, sizeof(bsg_name),
4012 "fc_host%d", shost->host_no);
4013
4014 q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4015 if (!q) {
4016 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4017 "initialize - no request queue\n",
4018 shost->host_no);
4019 return -ENOMEM;
4020 }
4021
4022 q->queuedata = shost;
4023 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4024 blk_queue_softirq_done(q, fc_bsg_softirq_done);
4025 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4026 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4027
4028 err = bsg_register_queue(q, dev, bsg_name, NULL);
4029 if (err) {
4030 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4031 "initialize - register queue\n",
4032 shost->host_no);
4033 blk_cleanup_queue(q);
4034 return err;
4035 }
4036
4037 fc_host->rqst_q = q;
4038 return 0;
4039}
4040
4041
4042/**
4043 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4044 * @shost: shost that rport is attached to
4045 * @rport: rport that the bsg hooks are being attached to
4046 */
4047static int
4048fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4049{
4050 struct device *dev = &rport->dev;
4051 struct fc_internal *i = to_fc_internal(shost->transportt);
4052 struct request_queue *q;
4053 int err;
4054
4055 rport->rqst_q = NULL;
4056
4057 if (!i->f->bsg_request)
4058 return -ENOTSUPP;
4059
4060 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4061 if (!q) {
4062 printk(KERN_ERR "%s: bsg interface failed to "
4063 "initialize - no request queue\n",
4064 dev->kobj.name);
4065 return -ENOMEM;
4066 }
4067
4068 q->queuedata = rport;
4069 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4070 blk_queue_softirq_done(q, fc_bsg_softirq_done);
4071 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4072 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4073
4074 err = bsg_register_queue(q, dev, NULL, NULL);
4075 if (err) {
4076 printk(KERN_ERR "%s: bsg interface failed to "
4077 "initialize - register queue\n",
4078 dev->kobj.name);
4079 blk_cleanup_queue(q);
4080 return err;
4081 }
4082
4083 rport->rqst_q = q;
4084 return 0;
4085}
4086
4087
4088/**
4089 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4090 * @q: the request_queue that is to be torn down.
4091 *
4092 * Notes:
4093 * Before unregistering the queue empty any requests that are blocked
4094 *
4095 *
4096 */
4097static void
4098fc_bsg_remove(struct request_queue *q)
4099{
4100 struct request *req; /* block request */
4101 int counts; /* totals for request_list count and starved */
4102
4103 if (q) {
4104 /* Stop taking in new requests */
4105 spin_lock_irq(q->queue_lock);
4106 blk_stop_queue(q);
4107
4108 /* drain all requests in the queue */
4109 while (1) {
4110 /* need the lock to fetch a request
4111 * this may fetch the same reqeust as the previous pass
4112 */
4113 req = blk_fetch_request(q);
4114 /* save requests in use and starved */
4115 counts = q->rq.count[0] + q->rq.count[1] +
4116 q->rq.starved[0] + q->rq.starved[1];
4117 spin_unlock_irq(q->queue_lock);
4118 /* any requests still outstanding? */
4119 if (counts == 0)
4120 break;
4121
4122 /* This may be the same req as the previous iteration,
4123 * always send the blk_end_request_all after a prefetch.
4124 * It is not okay to not end the request because the
4125 * prefetch started the request.
4126 */
4127 if (req) {
4128 /* return -ENXIO to indicate that this queue is
4129 * going away
4130 */
4131 req->errors = -ENXIO;
4132 blk_end_request_all(req, -ENXIO);
4133 }
4134
4135 msleep(200); /* allow bsg to possibly finish */
4136 spin_lock_irq(q->queue_lock);
4137 }
4138
4139 bsg_unregister_queue(q);
4140 blk_cleanup_queue(q);
4141 }
4142}
4143
4144
4145/* Original Author: Martin Hicks */
4146MODULE_AUTHOR("James Smart");
4147MODULE_DESCRIPTION("FC Transport Attributes");
4148MODULE_LICENSE("GPL");
4149
4150module_init(fc_transport_init);
4151module_exit(fc_transport_exit);