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