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