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[PATCH] remove many unneeded #includes of sched.h
[deliverable/linux.git] / drivers / scsi / scsi_transport_fc.c
CommitLineData
1da177e4
LT		 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) 2004-2005 James Smart, Emulex Corporation
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
25 *
26 */
27#include <linux/module.h>
28#include <linux/init.h>
29#include <scsi/scsi_device.h>
30#include <scsi/scsi_host.h>
31#include <scsi/scsi_transport.h>
32#include <scsi/scsi_transport_fc.h>
c829c394 33#include <scsi/scsi_cmnd.h>
84314fd4
JS		 34#include <linux/netlink.h>
35#include <net/netlink.h>
36#include <scsi/scsi_netlink_fc.h>
1da177e4
LT		 37#include "scsi_priv.h"
38
aedf3497
JS		 39static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
40
1da177e4
LT		 41/*
42 * Redefine so that we can have same named attributes in the
43 * sdev/starget/host objects.
44 */
45#define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
46struct class_device_attribute class_device_attr_##_prefix##_##_name = \
47 __ATTR(_name,_mode,_show,_store)
48
49#define fc_enum_name_search(title, table_type, table) \
50static const char *get_fc_##title##_name(enum table_type table_key) \
51{ \
52 int i; \
53 char *name = NULL; \
54 \
6391a113 55 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 56 if (table[i].value == table_key) { \
57 name = table[i].name; \
58 break; \
59 } \
60 } \
61 return name; \
62}
63
64#define fc_enum_name_match(title, table_type, table) \
65static int get_fc_##title##_match(const char *table_key, \
66 enum table_type *value) \
67{ \
68 int i; \
69 \
6391a113 70 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 71 if (strncmp(table_key, table[i].name, \
72 table[i].matchlen) == 0) { \
73 *value = table[i].value; \
74 return 0; /* success */ \
75 } \
76 } \
77 return 1; /* failure */ \
78}
79
80
81/* Convert fc_port_type values to ascii string name */
82static struct {
83 enum fc_port_type value;
84 char *name;
85} fc_port_type_names[] = {
86 { FC_PORTTYPE_UNKNOWN, "Unknown" },
87 { FC_PORTTYPE_OTHER, "Other" },
88 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
89 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
90 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
91 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
92 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" },
93};
94fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
95#define FC_PORTTYPE_MAX_NAMELEN 50
96
97
84314fd4
JS		 98/* Convert fc_host_event_code values to ascii string name */
99static const struct {
100 enum fc_host_event_code value;
101 char *name;
102} fc_host_event_code_names[] = {
103 { FCH_EVT_LIP, "lip" },
104 { FCH_EVT_LINKUP, "link_up" },
105 { FCH_EVT_LINKDOWN, "link_down" },
106 { FCH_EVT_LIPRESET, "lip_reset" },
107 { FCH_EVT_RSCN, "rscn" },
108 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
109 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
110 { FCH_EVT_PORT_ONLINE, "port_online" },
111 { FCH_EVT_PORT_OFFLINE, "port_offline" },
112 { FCH_EVT_PORT_FABRIC, "port_fabric" },
113 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
114 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
115};
116fc_enum_name_search(host_event_code, fc_host_event_code,
117 fc_host_event_code_names)
118#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
119
120
1da177e4
LT		 121/* Convert fc_port_state values to ascii string name */
122static struct {
123 enum fc_port_state value;
124 char *name;
125} fc_port_state_names[] = {
126 { FC_PORTSTATE_UNKNOWN, "Unknown" },
127 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
128 { FC_PORTSTATE_ONLINE, "Online" },
129 { FC_PORTSTATE_OFFLINE, "Offline" },
130 { FC_PORTSTATE_BLOCKED, "Blocked" },
131 { FC_PORTSTATE_BYPASSED, "Bypassed" },
132 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
133 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
134 { FC_PORTSTATE_ERROR, "Error" },
135 { FC_PORTSTATE_LOOPBACK, "Loopback" },
42e33148 136 { FC_PORTSTATE_DELETED, "Deleted" },
1da177e4
LT		 137};
138fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
139#define FC_PORTSTATE_MAX_NAMELEN 20
140
141
142/* Convert fc_tgtid_binding_type values to ascii string name */
0ad78200 143static const struct {
1da177e4
LT		 144 enum fc_tgtid_binding_type value;
145 char *name;
146 int matchlen;
147} fc_tgtid_binding_type_names[] = {
148 { FC_TGTID_BIND_NONE, "none", 4 },
149 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
150 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
151 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
152};
153fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
154 fc_tgtid_binding_type_names)
155fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
156 fc_tgtid_binding_type_names)
157#define FC_BINDTYPE_MAX_NAMELEN 30
158
159
160#define fc_bitfield_name_search(title, table) \
161static ssize_t \
162get_fc_##title##_names(u32 table_key, char *buf) \
163{ \
164 char *prefix = ""; \
165 ssize_t len = 0; \
166 int i; \
167 \
6391a113 168 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 169 if (table[i].value & table_key) { \
170 len += sprintf(buf + len, "%s%s", \
171 prefix, table[i].name); \
172 prefix = ", "; \
173 } \
174 } \
175 len += sprintf(buf + len, "\n"); \
176 return len; \
177}
178
179
180/* Convert FC_COS bit values to ascii string name */
0ad78200 181static const struct {
1da177e4
LT		 182 u32 value;
183 char *name;
184} fc_cos_names[] = {
185 { FC_COS_CLASS1, "Class 1" },
186 { FC_COS_CLASS2, "Class 2" },
187 { FC_COS_CLASS3, "Class 3" },
188 { FC_COS_CLASS4, "Class 4" },
189 { FC_COS_CLASS6, "Class 6" },
190};
191fc_bitfield_name_search(cos, fc_cos_names)
192
193
194/* Convert FC_PORTSPEED bit values to ascii string name */
0ad78200 195static const struct {
1da177e4
LT		 196 u32 value;
197 char *name;
198} fc_port_speed_names[] = {
199 { FC_PORTSPEED_1GBIT, "1 Gbit" },
200 { FC_PORTSPEED_2GBIT, "2 Gbit" },
201 { FC_PORTSPEED_4GBIT, "4 Gbit" },
202 { FC_PORTSPEED_10GBIT, "10 Gbit" },
203 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
204};
205fc_bitfield_name_search(port_speed, fc_port_speed_names)
206
207
208static int
209show_fc_fc4s (char *buf, u8 *fc4_list)
210{
211 int i, len=0;
212
213 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
214 len += sprintf(buf + len , "0x%02x ", *fc4_list);
215 len += sprintf(buf + len, "\n");
216 return len;
217}
218
219
220/* Convert FC_RPORT_ROLE bit values to ascii string name */
0ad78200 221static const struct {
1da177e4
LT		 222 u32 value;
223 char *name;
224} fc_remote_port_role_names[] = {
225 { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" },
226 { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
227 { FC_RPORT_ROLE_IP_PORT, "IP Port" },
228};
229fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names)
230
231/*
232 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
233 */
234#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
235#define FC_WELLKNOWN_ROLE_MASK 0x00000f
236#define FC_FPORT_PORTID 0x00000e
237#define FC_FABCTLR_PORTID 0x00000d
238#define FC_DIRSRVR_PORTID 0x00000c
239#define FC_TIMESRVR_PORTID 0x00000b
240#define FC_MGMTSRVR_PORTID 0x00000a
241
242
c4028958
DH		 243static void fc_timeout_deleted_rport(struct work_struct *work);
244static void fc_timeout_fail_rport_io(struct work_struct *work);
245static void fc_scsi_scan_rport(struct work_struct *work);
1da177e4
LT		 246
247/*
248 * Attribute counts pre object type...
249 * Increase these values if you add attributes
250 */
251#define FC_STARGET_NUM_ATTRS 3
0f29b966 252#define FC_RPORT_NUM_ATTRS 10
ad139a2f 253#define FC_HOST_NUM_ATTRS 17
1da177e4
LT		 254
255struct fc_internal {
256 struct scsi_transport_template t;
257 struct fc_function_template *f;
258
259 /*
260 * For attributes : each object has :
261 * An array of the actual attributes structures
262 * An array of null-terminated pointers to the attribute
263 * structures - used for mid-layer interaction.
264 *
265 * The attribute containers for the starget and host are are
266 * part of the midlayer. As the remote port is specific to the
267 * fc transport, we must provide the attribute container.
268 */
269 struct class_device_attribute private_starget_attrs[
270 FC_STARGET_NUM_ATTRS];
271 struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
272
273 struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
274 struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
275
276 struct transport_container rport_attr_cont;
277 struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
278 struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
279};
280
281#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
282
d0a7e574
JB		 283static int fc_target_setup(struct transport_container *tc, struct device *dev,
284 struct class_device *cdev)
1da177e4
LT		 285{
286 struct scsi_target *starget = to_scsi_target(dev);
287 struct fc_rport *rport = starget_to_rport(starget);
288
289 /*
290 * if parent is remote port, use values from remote port.
291 * Otherwise, this host uses the fc_transport, but not the
292 * remote port interface. As such, initialize to known non-values.
293 */
294 if (rport) {
295 fc_starget_node_name(starget) = rport->node_name;
296 fc_starget_port_name(starget) = rport->port_name;
297 fc_starget_port_id(starget) = rport->port_id;
298 } else {
299 fc_starget_node_name(starget) = -1;
300 fc_starget_port_name(starget) = -1;
301 fc_starget_port_id(starget) = -1;
302 }
303
304 return 0;
305}
306
307static DECLARE_TRANSPORT_CLASS(fc_transport_class,
308 "fc_transport",
309 fc_target_setup,
310 NULL,
311 NULL);
312
d0a7e574
JB		 313static int fc_host_setup(struct transport_container *tc, struct device *dev,
314 struct class_device *cdev)
1da177e4
LT		 315{
316 struct Scsi_Host *shost = dev_to_shost(dev);
aedf3497 317 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 318
319 /*
320 * Set default values easily detected by the midlayer as
321 * failure cases. The scsi lldd is responsible for initializing
322 * all transport attributes to valid values per host.
323 */
aedf3497
JS		 324 fc_host->node_name = -1;
325 fc_host->port_name = -1;
326 fc_host->permanent_port_name = -1;
327 fc_host->supported_classes = FC_COS_UNSPECIFIED;
328 memset(fc_host->supported_fc4s, 0,
329 sizeof(fc_host->supported_fc4s));
aedf3497
JS		 330 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
331 fc_host->maxframe_size = -1;
332 memset(fc_host->serial_number, 0,
333 sizeof(fc_host->serial_number));
334
335 fc_host->port_id = -1;
336 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
337 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
338 memset(fc_host->active_fc4s, 0,
339 sizeof(fc_host->active_fc4s));
340 fc_host->speed = FC_PORTSPEED_UNKNOWN;
341 fc_host->fabric_name = -1;
b8d08210
JS		 342 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
343 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
aedf3497
JS		 344
345 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
346
347 INIT_LIST_HEAD(&fc_host->rports);
348 INIT_LIST_HEAD(&fc_host->rport_bindings);
349 fc_host->next_rport_number = 0;
350 fc_host->next_target_id = 0;
351
352 snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d",
353 shost->host_no);
354 fc_host->work_q = create_singlethread_workqueue(
355 fc_host->work_q_name);
356 if (!fc_host->work_q)
357 return -ENOMEM;
358
359 snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d",
360 shost->host_no);
361 fc_host->devloss_work_q = create_singlethread_workqueue(
362 fc_host->devloss_work_q_name);
363 if (!fc_host->devloss_work_q) {
364 destroy_workqueue(fc_host->work_q);
365 fc_host->work_q = NULL;
366 return -ENOMEM;
367 }
368
1da177e4
LT		 369 return 0;
370}
371
372static DECLARE_TRANSPORT_CLASS(fc_host_class,
373 "fc_host",
374 fc_host_setup,
375 NULL,
376 NULL);
377
378/*
379 * Setup and Remove actions for remote ports are handled
380 * in the service functions below.
381 */
382static DECLARE_TRANSPORT_CLASS(fc_rport_class,
383 "fc_remote_ports",
384 NULL,
385 NULL,
386 NULL);
387
388/*
389 * Module Parameters
390 */
391
392/*
393 * dev_loss_tmo: the default number of seconds that the FC transport
394 * should insulate the loss of a remote port.
395 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
396 */
1c9e16e4 397static unsigned int fc_dev_loss_tmo = 60; /* seconds */
1da177e4
LT		 398
399module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR);
400MODULE_PARM_DESC(dev_loss_tmo,
401 "Maximum number of seconds that the FC transport should"
402 " insulate the loss of a remote port. Once this value is"
403 " exceeded, the scsi target is removed. Value should be"
404 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
405
84314fd4
JS		 406/**
407 * Netlink Infrastructure
408 **/
409
410static atomic_t fc_event_seq;
411
412/**
413 * fc_get_event_number - Obtain the next sequential FC event number
414 *
415 * Notes:
416 * We could have inline'd this, but it would have required fc_event_seq to
417 * be exposed. For now, live with the subroutine call.
418 * Atomic used to avoid lock/unlock...
419 **/
420u32
421fc_get_event_number(void)
422{
423 return atomic_add_return(1, &fc_event_seq);
424}
425EXPORT_SYMBOL(fc_get_event_number);
426
427
428/**
429 * fc_host_post_event - called to post an even on an fc_host.
430 *
431 * @shost: host the event occurred on
432 * @event_number: fc event number obtained from get_fc_event_number()
433 * @event_code: fc_host event being posted
434 * @event_data: 32bits of data for the event being posted
435 *
436 * Notes:
437 * This routine assumes no locks are held on entry.
438 **/
439void
440fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
441 enum fc_host_event_code event_code, u32 event_data)
442{
443 struct sk_buff *skb;
444 struct nlmsghdr *nlh;
445 struct fc_nl_event *event;
446 const char *name;
447 u32 len, skblen;
448 int err;
449
450 if (!scsi_nl_sock) {
451 err = -ENOENT;
452 goto send_fail;
453 }
454
455 len = FC_NL_MSGALIGN(sizeof(*event));
456 skblen = NLMSG_SPACE(len);
457
458 skb = alloc_skb(skblen, GFP_KERNEL);
459 if (!skb) {
460 err = -ENOBUFS;
461 goto send_fail;
462 }
463
464 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
465 skblen - sizeof(*nlh), 0);
466 if (!nlh) {
467 err = -ENOBUFS;
468 goto send_fail_skb;
469 }
470 event = NLMSG_DATA(nlh);
471
472 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
473 FC_NL_ASYNC_EVENT, len);
474 event->seconds = get_seconds();
475 event->vendor_id = 0;
476 event->host_no = shost->host_no;
477 event->event_datalen = sizeof(u32); /* bytes */
478 event->event_num = event_number;
479 event->event_code = event_code;
480 event->event_data = event_data;
481
1b73c4bb
JB		 482 err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
483 GFP_KERNEL);
84314fd4
JS		 484 if (err && (err != -ESRCH)) /* filter no recipient errors */
485 /* nlmsg_multicast already kfree_skb'd */
486 goto send_fail;
487
488 return;
489
490send_fail_skb:
491 kfree_skb(skb);
492send_fail:
493 name = get_fc_host_event_code_name(event_code);
494 printk(KERN_WARNING
495 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
496 __FUNCTION__, shost->host_no,
497 (name) ? name : "<unknown>", event_data, err);
498 return;
499}
500EXPORT_SYMBOL(fc_host_post_event);
501
502
503/**
504 * fc_host_post_vendor_event - called to post a vendor unique event on
505 * a fc_host
506 *
507 * @shost: host the event occurred on
508 * @event_number: fc event number obtained from get_fc_event_number()
509 * @data_len: amount, in bytes, of vendor unique data
510 * @data_buf: pointer to vendor unique data
511 *
512 * Notes:
513 * This routine assumes no locks are held on entry.
514 **/
515void
516fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
f14e2e29 517 u32 data_len, char * data_buf, u64 vendor_id)
84314fd4
JS		 518{
519 struct sk_buff *skb;
520 struct nlmsghdr *nlh;
521 struct fc_nl_event *event;
522 u32 len, skblen;
523 int err;
524
525 if (!scsi_nl_sock) {
526 err = -ENOENT;
527 goto send_vendor_fail;
528 }
529
530 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
531 skblen = NLMSG_SPACE(len);
532
533 skb = alloc_skb(skblen, GFP_KERNEL);
534 if (!skb) {
535 err = -ENOBUFS;
536 goto send_vendor_fail;
537 }
538
539 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
540 skblen - sizeof(*nlh), 0);
541 if (!nlh) {
542 err = -ENOBUFS;
543 goto send_vendor_fail_skb;
544 }
545 event = NLMSG_DATA(nlh);
546
547 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
548 FC_NL_ASYNC_EVENT, len);
549 event->seconds = get_seconds();
550 event->vendor_id = vendor_id;
551 event->host_no = shost->host_no;
552 event->event_datalen = data_len; /* bytes */
553 event->event_num = event_number;
554 event->event_code = FCH_EVT_VENDOR_UNIQUE;
555 memcpy(&event->event_data, data_buf, data_len);
556
1b73c4bb
JB		 557 err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
558 GFP_KERNEL);
84314fd4
JS		 559 if (err && (err != -ESRCH)) /* filter no recipient errors */
560 /* nlmsg_multicast already kfree_skb'd */
561 goto send_vendor_fail;
562
563 return;
564
565send_vendor_fail_skb:
566 kfree_skb(skb);
567send_vendor_fail:
568 printk(KERN_WARNING
569 "%s: Dropped Event : host %d vendor_unique - err %d\n",
570 __FUNCTION__, shost->host_no, err);
571 return;
572}
573EXPORT_SYMBOL(fc_host_post_vendor_event);
574
575
1da177e4
LT		 576
577static __init int fc_transport_init(void)
578{
84314fd4
JS		 579 int error;
580
581 atomic_set(&fc_event_seq, 0);
582
583 error = transport_class_register(&fc_host_class);
1da177e4
LT		 584 if (error)
585 return error;
586 error = transport_class_register(&fc_rport_class);
587 if (error)
588 return error;
589 return transport_class_register(&fc_transport_class);
590}
591
592static void __exit fc_transport_exit(void)
593{
594 transport_class_unregister(&fc_transport_class);
595 transport_class_unregister(&fc_rport_class);
596 transport_class_unregister(&fc_host_class);
597}
598
599/*
600 * FC Remote Port Attribute Management
601 */
602
603#define fc_rport_show_function(field, format_string, sz, cast) \
604static ssize_t \
605show_fc_rport_##field (struct class_device *cdev, char *buf) \
606{ \
607 struct fc_rport *rport = transport_class_to_rport(cdev); \
608 struct Scsi_Host *shost = rport_to_shost(rport); \
609 struct fc_internal *i = to_fc_internal(shost->transportt); \
19a7b4ae
JSEC		 610 if ((i->f->get_rport_##field) && \
611 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 612 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae 613 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
1da177e4
LT		 614 i->f->get_rport_##field(rport); \
615 return snprintf(buf, sz, format_string, cast rport->field); \
616}
617
618#define fc_rport_store_function(field) \
619static ssize_t \
620store_fc_rport_##field(struct class_device *cdev, const char *buf, \
621 size_t count) \
622{ \
623 int val; \
624 struct fc_rport *rport = transport_class_to_rport(cdev); \
625 struct Scsi_Host *shost = rport_to_shost(rport); \
626 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 627 char *cp; \
19a7b4ae 628 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 629 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae
JSEC		 630 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
631 return -EBUSY; \
0f29b966
JS		 632 val = simple_strtoul(buf, &cp, 0); \
633 if (*cp && (*cp != '\n')) \
634 return -EINVAL; \
1da177e4
LT		 635 i->f->set_rport_##field(rport, val); \
636 return count; \
637}
638
639#define fc_rport_rd_attr(field, format_string, sz) \
640 fc_rport_show_function(field, format_string, sz, ) \
641static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
642 show_fc_rport_##field, NULL)
643
644#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
645 fc_rport_show_function(field, format_string, sz, (cast)) \
646static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
647 show_fc_rport_##field, NULL)
648
649#define fc_rport_rw_attr(field, format_string, sz) \
650 fc_rport_show_function(field, format_string, sz, ) \
651 fc_rport_store_function(field) \
652static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
653 show_fc_rport_##field, \
654 store_fc_rport_##field)
655
656
657#define fc_private_rport_show_function(field, format_string, sz, cast) \
658static ssize_t \
659show_fc_rport_##field (struct class_device *cdev, char *buf) \
660{ \
661 struct fc_rport *rport = transport_class_to_rport(cdev); \
662 return snprintf(buf, sz, format_string, cast rport->field); \
663}
664
665#define fc_private_rport_rd_attr(field, format_string, sz) \
666 fc_private_rport_show_function(field, format_string, sz, ) \
667static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
668 show_fc_rport_##field, NULL)
669
670#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
671 fc_private_rport_show_function(field, format_string, sz, (cast)) \
672static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
673 show_fc_rport_##field, NULL)
674
675
676#define fc_private_rport_rd_enum_attr(title, maxlen) \
677static ssize_t \
678show_fc_rport_##title (struct class_device *cdev, char *buf) \
679{ \
680 struct fc_rport *rport = transport_class_to_rport(cdev); \
681 const char *name; \
682 name = get_fc_##title##_name(rport->title); \
683 if (!name) \
684 return -EINVAL; \
685 return snprintf(buf, maxlen, "%s\n", name); \
686} \
687static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \
688 show_fc_rport_##title, NULL)
689
690
691#define SETUP_RPORT_ATTRIBUTE_RD(field) \
692 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
693 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
694 i->private_rport_attrs[count].store = NULL; \
695 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
696 if (i->f->show_rport_##field) \
697 count++
698
699#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
700 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
701 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
702 i->private_rport_attrs[count].store = NULL; \
703 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
704 count++
705
706#define SETUP_RPORT_ATTRIBUTE_RW(field) \
707 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
708 if (!i->f->set_rport_##field) { \
709 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
710 i->private_rport_attrs[count].store = NULL; \
711 } \
712 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
713 if (i->f->show_rport_##field) \
714 count++
715
0f29b966
JS		 716#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
717{ \
718 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
719 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
720 count++; \
721}
722
1da177e4
LT		 723
724/* The FC Transport Remote Port Attributes: */
725
726/* Fixed Remote Port Attributes */
727
728fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
729
730static ssize_t
731show_fc_rport_supported_classes (struct class_device *cdev, char *buf)
732{
733 struct fc_rport *rport = transport_class_to_rport(cdev);
734 if (rport->supported_classes == FC_COS_UNSPECIFIED)
735 return snprintf(buf, 20, "unspecified\n");
736 return get_fc_cos_names(rport->supported_classes, buf);
737}
738static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
739 show_fc_rport_supported_classes, NULL);
740
741/* Dynamic Remote Port Attributes */
742
19a7b4ae
JSEC		 743/*
744 * dev_loss_tmo attribute
745 */
746fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
747static ssize_t
748store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf,
749 size_t count)
750{
751 int val;
752 struct fc_rport *rport = transport_class_to_rport(cdev);
753 struct Scsi_Host *shost = rport_to_shost(rport);
754 struct fc_internal *i = to_fc_internal(shost->transportt);
0f29b966 755 char *cp;
19a7b4ae 756 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
42e33148 757 (rport->port_state == FC_PORTSTATE_DELETED) ||
19a7b4ae
JSEC		 758 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
759 return -EBUSY;
0f29b966
JS		 760 val = simple_strtoul(buf, &cp, 0);
761 if ((*cp && (*cp != '\n')) ||
762 (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
19a7b4ae
JSEC		 763 return -EINVAL;
764 i->f->set_rport_dev_loss_tmo(rport, val);
765 return count;
766}
767static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
768 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1da177e4
LT		 769
770
771/* Private Remote Port Attributes */
772
773fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
774fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
775fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
776
777static ssize_t
778show_fc_rport_roles (struct class_device *cdev, char *buf)
779{
780 struct fc_rport *rport = transport_class_to_rport(cdev);
781
782 /* identify any roles that are port_id specific */
783 if ((rport->port_id != -1) &&
784 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
785 FC_WELLKNOWN_PORTID_MASK) {
786 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
787 case FC_FPORT_PORTID:
788 return snprintf(buf, 30, "Fabric Port\n");
789 case FC_FABCTLR_PORTID:
790 return snprintf(buf, 30, "Fabric Controller\n");
791 case FC_DIRSRVR_PORTID:
792 return snprintf(buf, 30, "Directory Server\n");
793 case FC_TIMESRVR_PORTID:
794 return snprintf(buf, 30, "Time Server\n");
795 case FC_MGMTSRVR_PORTID:
796 return snprintf(buf, 30, "Management Server\n");
797 default:
798 return snprintf(buf, 30, "Unknown Fabric Entity\n");
799 }
800 } else {
801 if (rport->roles == FC_RPORT_ROLE_UNKNOWN)
802 return snprintf(buf, 20, "unknown\n");
803 return get_fc_remote_port_roles_names(rport->roles, buf);
804 }
805}
806static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO,
807 show_fc_rport_roles, NULL);
808
809fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
810fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
811
0f29b966
JS		 812/*
813 * fast_io_fail_tmo attribute
814 */
815static ssize_t
816show_fc_rport_fast_io_fail_tmo (struct class_device *cdev, char *buf)
817{
818 struct fc_rport *rport = transport_class_to_rport(cdev);
819
820 if (rport->fast_io_fail_tmo == -1)
821 return snprintf(buf, 5, "off\n");
822 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
823}
824
825static ssize_t
826store_fc_rport_fast_io_fail_tmo(struct class_device *cdev, const char *buf,
827 size_t count)
828{
829 int val;
830 char *cp;
831 struct fc_rport *rport = transport_class_to_rport(cdev);
832
833 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
834 (rport->port_state == FC_PORTSTATE_DELETED) ||
835 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
836 return -EBUSY;
837 if (strncmp(buf, "off", 3) == 0)
838 rport->fast_io_fail_tmo = -1;
839 else {
840 val = simple_strtoul(buf, &cp, 0);
841 if ((*cp && (*cp != '\n')) ||
842 (val < 0) || (val >= rport->dev_loss_tmo))
843 return -EINVAL;
844 rport->fast_io_fail_tmo = val;
845 }
846 return count;
847}
848static FC_CLASS_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
849 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1da177e4
LT		 850
851
852/*
853 * FC SCSI Target Attribute Management
854 */
855
856/*
857 * Note: in the target show function we recognize when the remote
858 * port is in the heirarchy and do not allow the driver to get
859 * involved in sysfs functions. The driver only gets involved if
860 * it's the "old" style that doesn't use rports.
861 */
862#define fc_starget_show_function(field, format_string, sz, cast) \
863static ssize_t \
864show_fc_starget_##field (struct class_device *cdev, char *buf) \
865{ \
866 struct scsi_target *starget = transport_class_to_starget(cdev); \
867 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
868 struct fc_internal *i = to_fc_internal(shost->transportt); \
869 struct fc_rport *rport = starget_to_rport(starget); \
870 if (rport) \
871 fc_starget_##field(starget) = rport->field; \
872 else if (i->f->get_starget_##field) \
873 i->f->get_starget_##field(starget); \
874 return snprintf(buf, sz, format_string, \
875 cast fc_starget_##field(starget)); \
876}
877
878#define fc_starget_rd_attr(field, format_string, sz) \
879 fc_starget_show_function(field, format_string, sz, ) \
880static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
881 show_fc_starget_##field, NULL)
882
883#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
884 fc_starget_show_function(field, format_string, sz, (cast)) \
885static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
886 show_fc_starget_##field, NULL)
887
888#define SETUP_STARGET_ATTRIBUTE_RD(field) \
889 i->private_starget_attrs[count] = class_device_attr_starget_##field; \
890 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
891 i->private_starget_attrs[count].store = NULL; \
892 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
893 if (i->f->show_starget_##field) \
894 count++
895
896#define SETUP_STARGET_ATTRIBUTE_RW(field) \
897 i->private_starget_attrs[count] = class_device_attr_starget_##field; \
898 if (!i->f->set_starget_##field) { \
899 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
900 i->private_starget_attrs[count].store = NULL; \
901 } \
902 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
903 if (i->f->show_starget_##field) \
904 count++
905
906/* The FC Transport SCSI Target Attributes: */
907fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
908fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
909fc_starget_rd_attr(port_id, "0x%06x\n", 20);
910
911
912/*
913 * Host Attribute Management
914 */
915
916#define fc_host_show_function(field, format_string, sz, cast) \
917static ssize_t \
918show_fc_host_##field (struct class_device *cdev, char *buf) \
919{ \
920 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
921 struct fc_internal *i = to_fc_internal(shost->transportt); \
922 if (i->f->get_host_##field) \
923 i->f->get_host_##field(shost); \
924 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
925}
926
927#define fc_host_store_function(field) \
928static ssize_t \
929store_fc_host_##field(struct class_device *cdev, const char *buf, \
930 size_t count) \
931{ \
932 int val; \
933 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
934 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 935 char *cp; \
1da177e4 936 \
0f29b966
JS		 937 val = simple_strtoul(buf, &cp, 0); \
938 if (*cp && (*cp != '\n')) \
939 return -EINVAL; \
1da177e4
LT		 940 i->f->set_host_##field(shost, val); \
941 return count; \
942}
943
b8d08210
JS		 944#define fc_host_store_str_function(field, slen) \
945static ssize_t \
946store_fc_host_##field(struct class_device *cdev, const char *buf, \
947 size_t count) \
948{ \
949 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
950 struct fc_internal *i = to_fc_internal(shost->transportt); \
951 unsigned int cnt=count; \
952 \
953 /* count may include a LF at end of string */ \
954 if (buf[cnt-1] == '\n') \
955 cnt--; \
956 if (cnt > ((slen) - 1)) \
957 return -EINVAL; \
958 memcpy(fc_host_##field(shost), buf, cnt); \
959 i->f->set_host_##field(shost); \
960 return count; \
961}
962
1da177e4
LT		 963#define fc_host_rd_attr(field, format_string, sz) \
964 fc_host_show_function(field, format_string, sz, ) \
965static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
966 show_fc_host_##field, NULL)
967
968#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
969 fc_host_show_function(field, format_string, sz, (cast)) \
970static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
971 show_fc_host_##field, NULL)
972
973#define fc_host_rw_attr(field, format_string, sz) \
974 fc_host_show_function(field, format_string, sz, ) \
975 fc_host_store_function(field) \
976static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
977 show_fc_host_##field, \
978 store_fc_host_##field)
979
980#define fc_host_rd_enum_attr(title, maxlen) \
981static ssize_t \
982show_fc_host_##title (struct class_device *cdev, char *buf) \
983{ \
984 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
985 struct fc_internal *i = to_fc_internal(shost->transportt); \
986 const char *name; \
987 if (i->f->get_host_##title) \
988 i->f->get_host_##title(shost); \
989 name = get_fc_##title##_name(fc_host_##title(shost)); \
990 if (!name) \
991 return -EINVAL; \
992 return snprintf(buf, maxlen, "%s\n", name); \
993} \
994static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
995
996#define SETUP_HOST_ATTRIBUTE_RD(field) \
997 i->private_host_attrs[count] = class_device_attr_host_##field; \
998 i->private_host_attrs[count].attr.mode = S_IRUGO; \
999 i->private_host_attrs[count].store = NULL; \
1000 i->host_attrs[count] = &i->private_host_attrs[count]; \
1001 if (i->f->show_host_##field) \
1002 count++
1003
1004#define SETUP_HOST_ATTRIBUTE_RW(field) \
1005 i->private_host_attrs[count] = class_device_attr_host_##field; \
1006 if (!i->f->set_host_##field) { \
1007 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1008 i->private_host_attrs[count].store = NULL; \
1009 } \
1010 i->host_attrs[count] = &i->private_host_attrs[count]; \
1011 if (i->f->show_host_##field) \
1012 count++
1013
1014
1015#define fc_private_host_show_function(field, format_string, sz, cast) \
1016static ssize_t \
1017show_fc_host_##field (struct class_device *cdev, char *buf) \
1018{ \
1019 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
1020 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1021}
1022
1023#define fc_private_host_rd_attr(field, format_string, sz) \
1024 fc_private_host_show_function(field, format_string, sz, ) \
1025static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
1026 show_fc_host_##field, NULL)
1027
1028#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1029 fc_private_host_show_function(field, format_string, sz, (cast)) \
1030static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
1031 show_fc_host_##field, NULL)
1032
1033#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1034 i->private_host_attrs[count] = class_device_attr_host_##field; \
1035 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1036 i->private_host_attrs[count].store = NULL; \
1037 i->host_attrs[count] = &i->private_host_attrs[count]; \
1038 count++
1039
1040#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
91ca7b01 1041{ \
1da177e4
LT		 1042 i->private_host_attrs[count] = class_device_attr_host_##field; \
1043 i->host_attrs[count] = &i->private_host_attrs[count]; \
91ca7b01
AV		 1044 count++; \
1045}
1da177e4
LT		 1046
1047
1048/* Fixed Host Attributes */
1049
1050static ssize_t
1051show_fc_host_supported_classes (struct class_device *cdev, char *buf)
1052{
1053 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1054
1055 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1056 return snprintf(buf, 20, "unspecified\n");
1057
1058 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1059}
1060static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1061 show_fc_host_supported_classes, NULL);
1062
1063static ssize_t
1064show_fc_host_supported_fc4s (struct class_device *cdev, char *buf)
1065{
1066 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1067 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1068}
1069static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1070 show_fc_host_supported_fc4s, NULL);
1071
1072static ssize_t
1073show_fc_host_supported_speeds (struct class_device *cdev, char *buf)
1074{
1075 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1076
1077 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1078 return snprintf(buf, 20, "unknown\n");
1079
1080 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1081}
1082static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1083 show_fc_host_supported_speeds, NULL);
1084
1085
1086fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1087fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
6b7281d0
AH		 1088fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1089 unsigned long long);
1da177e4
LT		 1090fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1091fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1092
1093
1094/* Dynamic Host Attributes */
1095
1096static ssize_t
1097show_fc_host_active_fc4s (struct class_device *cdev, char *buf)
1098{
1099 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1100 struct fc_internal *i = to_fc_internal(shost->transportt);
1101
1102 if (i->f->get_host_active_fc4s)
1103 i->f->get_host_active_fc4s(shost);
1104
1105 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1106}
1107static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1108 show_fc_host_active_fc4s, NULL);
1109
1110static ssize_t
1111show_fc_host_speed (struct class_device *cdev, char *buf)
1112{
1113 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1114 struct fc_internal *i = to_fc_internal(shost->transportt);
1115
1116 if (i->f->get_host_speed)
1117 i->f->get_host_speed(shost);
1118
1119 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1120 return snprintf(buf, 20, "unknown\n");
1121
1122 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1123}
1124static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO,
1125 show_fc_host_speed, NULL);
1126
1127
1128fc_host_rd_attr(port_id, "0x%06x\n", 20);
1129fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1130fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1131fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
016131b8 1132fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1da177e4 1133
b8d08210
JS		 1134fc_private_host_show_function(system_hostname, "%s\n",
1135 FC_SYMBOLIC_NAME_SIZE + 1, )
1136fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1137static FC_CLASS_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1138 show_fc_host_system_hostname, store_fc_host_system_hostname);
1139
1da177e4
LT		 1140
1141/* Private Host Attributes */
1142
1143static ssize_t
1144show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf)
1145{
1146 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1147 const char *name;
1148
1149 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1150 if (!name)
1151 return -EINVAL;
1152 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1153}
1154
d16794f6
JSEC		 1155#define get_list_head_entry(pos, head, member) \
1156 pos = list_entry((head)->next, typeof(*pos), member)
1157
1da177e4
LT		 1158static ssize_t
1159store_fc_private_host_tgtid_bind_type(struct class_device *cdev,
1160 const char *buf, size_t count)
1161{
1162 struct Scsi_Host *shost = transport_class_to_shost(cdev);
d16794f6 1163 struct fc_rport *rport;
1da177e4
LT		 1164 enum fc_tgtid_binding_type val;
1165 unsigned long flags;
1166
1167 if (get_fc_tgtid_bind_type_match(buf, &val))
1168 return -EINVAL;
1169
1170 /* if changing bind type, purge all unused consistent bindings */
1171 if (val != fc_host_tgtid_bind_type(shost)) {
1172 spin_lock_irqsave(shost->host_lock, flags);
d16794f6
JSEC		 1173 while (!list_empty(&fc_host_rport_bindings(shost))) {
1174 get_list_head_entry(rport,
1175 &fc_host_rport_bindings(shost), peers);
aedf3497
JS		 1176 list_del(&rport->peers);
1177 rport->port_state = FC_PORTSTATE_DELETED;
1178 fc_queue_work(shost, &rport->rport_delete_work);
d16794f6 1179 }
1da177e4
LT		 1180 spin_unlock_irqrestore(shost->host_lock, flags);
1181 }
1182
1183 fc_host_tgtid_bind_type(shost) = val;
1184 return count;
1185}
1186
1187static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1188 show_fc_private_host_tgtid_bind_type,
1189 store_fc_private_host_tgtid_bind_type);
1190
91ca7b01
AV		 1191static ssize_t
1192store_fc_private_host_issue_lip(struct class_device *cdev,
1193 const char *buf, size_t count)
1194{
1195 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1196 struct fc_internal *i = to_fc_internal(shost->transportt);
1197 int ret;
1198
1199 /* ignore any data value written to the attribute */
1200 if (i->f->issue_fc_host_lip) {
1201 ret = i->f->issue_fc_host_lip(shost);
1202 return ret ? ret: count;
1203 }
1204
1205 return -ENOENT;
1206}
1207
1208static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1209 store_fc_private_host_issue_lip);
1210
1da177e4
LT		 1211/*
1212 * Host Statistics Management
1213 */
1214
1215/* Show a given an attribute in the statistics group */
1216static ssize_t
1217fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset)
1218{
1219 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1220 struct fc_internal *i = to_fc_internal(shost->transportt);
1221 struct fc_host_statistics *stats;
1222 ssize_t ret = -ENOENT;
1223
1224 if (offset > sizeof(struct fc_host_statistics) ||
1225 offset % sizeof(u64) != 0)
1226 WARN_ON(1);
1227
1228 if (i->f->get_fc_host_stats) {
1229 stats = (i->f->get_fc_host_stats)(shost);
1230 if (stats)
1231 ret = snprintf(buf, 20, "0x%llx\n",
1232 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1233 }
1234 return ret;
1235}
1236
1237
1238/* generate a read-only statistics attribute */
1239#define fc_host_statistic(name) \
1240static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \
1241{ \
1242 return fc_stat_show(cd, buf, \
1243 offsetof(struct fc_host_statistics, name)); \
1244} \
1245static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1246
1247fc_host_statistic(seconds_since_last_reset);
1248fc_host_statistic(tx_frames);
1249fc_host_statistic(tx_words);
1250fc_host_statistic(rx_frames);
1251fc_host_statistic(rx_words);
1252fc_host_statistic(lip_count);
1253fc_host_statistic(nos_count);
1254fc_host_statistic(error_frames);
1255fc_host_statistic(dumped_frames);
1256fc_host_statistic(link_failure_count);
1257fc_host_statistic(loss_of_sync_count);
1258fc_host_statistic(loss_of_signal_count);
1259fc_host_statistic(prim_seq_protocol_err_count);
1260fc_host_statistic(invalid_tx_word_count);
1261fc_host_statistic(invalid_crc_count);
1262fc_host_statistic(fcp_input_requests);
1263fc_host_statistic(fcp_output_requests);
1264fc_host_statistic(fcp_control_requests);
1265fc_host_statistic(fcp_input_megabytes);
1266fc_host_statistic(fcp_output_megabytes);
1267
1268static ssize_t
1269fc_reset_statistics(struct class_device *cdev, const char *buf,
1270 size_t count)
1271{
1272 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1273 struct fc_internal *i = to_fc_internal(shost->transportt);
1274
1275 /* ignore any data value written to the attribute */
1276 if (i->f->reset_fc_host_stats) {
1277 i->f->reset_fc_host_stats(shost);
1278 return count;
1279 }
1280
1281 return -ENOENT;
1282}
1283static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1284 fc_reset_statistics);
1285
1286
1287static struct attribute *fc_statistics_attrs[] = {
1288 &class_device_attr_host_seconds_since_last_reset.attr,
1289 &class_device_attr_host_tx_frames.attr,
1290 &class_device_attr_host_tx_words.attr,
1291 &class_device_attr_host_rx_frames.attr,
1292 &class_device_attr_host_rx_words.attr,
1293 &class_device_attr_host_lip_count.attr,
1294 &class_device_attr_host_nos_count.attr,
1295 &class_device_attr_host_error_frames.attr,
1296 &class_device_attr_host_dumped_frames.attr,
1297 &class_device_attr_host_link_failure_count.attr,
1298 &class_device_attr_host_loss_of_sync_count.attr,
1299 &class_device_attr_host_loss_of_signal_count.attr,
1300 &class_device_attr_host_prim_seq_protocol_err_count.attr,
1301 &class_device_attr_host_invalid_tx_word_count.attr,
1302 &class_device_attr_host_invalid_crc_count.attr,
1303 &class_device_attr_host_fcp_input_requests.attr,
1304 &class_device_attr_host_fcp_output_requests.attr,
1305 &class_device_attr_host_fcp_control_requests.attr,
1306 &class_device_attr_host_fcp_input_megabytes.attr,
1307 &class_device_attr_host_fcp_output_megabytes.attr,
1308 &class_device_attr_host_reset_statistics.attr,
1309 NULL
1310};
1311
1312static struct attribute_group fc_statistics_group = {
1313 .name = "statistics",
1314 .attrs = fc_statistics_attrs,
1315};
1316
1317static int fc_host_match(struct attribute_container *cont,
1318 struct device *dev)
1319{
1320 struct Scsi_Host *shost;
1321 struct fc_internal *i;
1322
1323 if (!scsi_is_host_device(dev))
1324 return 0;
1325
1326 shost = dev_to_shost(dev);
1327 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1328 != &fc_host_class.class)
1329 return 0;
1330
1331 i = to_fc_internal(shost->transportt);
1332
1333 return &i->t.host_attrs.ac == cont;
1334}
1335
1336static int fc_target_match(struct attribute_container *cont,
1337 struct device *dev)
1338{
1339 struct Scsi_Host *shost;
1340 struct fc_internal *i;
1341
1342 if (!scsi_is_target_device(dev))
1343 return 0;
1344
1345 shost = dev_to_shost(dev->parent);
1346 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1347 != &fc_host_class.class)
1348 return 0;
1349
1350 i = to_fc_internal(shost->transportt);
1351
1352 return &i->t.target_attrs.ac == cont;
1353}
1354
1355static void fc_rport_dev_release(struct device *dev)
1356{
1357 struct fc_rport *rport = dev_to_rport(dev);
1358 put_device(dev->parent);
1359 kfree(rport);
1360}
1361
1362int scsi_is_fc_rport(const struct device *dev)
1363{
1364 return dev->release == fc_rport_dev_release;
1365}
1366EXPORT_SYMBOL(scsi_is_fc_rport);
1367
1368static int fc_rport_match(struct attribute_container *cont,
1369 struct device *dev)
1370{
1371 struct Scsi_Host *shost;
1372 struct fc_internal *i;
1373
1374 if (!scsi_is_fc_rport(dev))
1375 return 0;
1376
1377 shost = dev_to_shost(dev->parent);
1378 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1379 != &fc_host_class.class)
1380 return 0;
1381
1382 i = to_fc_internal(shost->transportt);
1383
1384 return &i->rport_attr_cont.ac == cont;
1385}
1386
5c44cd2a 1387
c829c394
JS		 1388/**
1389 * fc_timed_out - FC Transport I/O timeout intercept handler
1390 *
1391 * @scmd: The SCSI command which timed out
1392 *
1393 * This routine protects against error handlers getting invoked while a
1394 * rport is in a blocked state, typically due to a temporarily loss of
1395 * connectivity. If the error handlers are allowed to proceed, requests
1396 * to abort i/o, reset the target, etc will likely fail as there is no way
1397 * to communicate with the device to perform the requested function. These
1398 * failures may result in the midlayer taking the device offline, requiring
1399 * manual intervention to restore operation.
1400 *
1401 * This routine, called whenever an i/o times out, validates the state of
1402 * the underlying rport. If the rport is blocked, it returns
1403 * EH_RESET_TIMER, which will continue to reschedule the timeout.
1404 * Eventually, either the device will return, or devloss_tmo will fire,
1405 * and when the timeout then fires, it will be handled normally.
1406 * If the rport is not blocked, normal error handling continues.
1407 *
1408 * Notes:
1409 * This routine assumes no locks are held on entry.
1410 **/
1411static enum scsi_eh_timer_return
1412fc_timed_out(struct scsi_cmnd *scmd)
1413{
1414 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
1415
1416 if (rport->port_state == FC_PORTSTATE_BLOCKED)
1417 return EH_RESET_TIMER;
1418
1419 return EH_NOT_HANDLED;
1420}
1421
5c44cd2a
JSEC		 1422/*
1423 * Must be called with shost->host_lock held
1424 */
e02f3f59
CH		 1425static int fc_user_scan(struct Scsi_Host *shost, uint channel,
1426 uint id, uint lun)
5c44cd2a
JSEC		 1427{
1428 struct fc_rport *rport;
1429
e02f3f59
CH		 1430 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1431 if (rport->scsi_target_id == -1)
1432 continue;
5c44cd2a 1433
e02f3f59
CH		 1434 if ((channel == SCAN_WILD_CARD || channel == rport->channel) &&
1435 (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) {
1436 scsi_scan_target(&rport->dev, rport->channel,
1437 rport->scsi_target_id, lun, 1);
1438 }
1439 }
1440
1441 return 0;
5c44cd2a
JSEC		 1442}
1443
1da177e4
LT		 1444struct scsi_transport_template *
1445fc_attach_transport(struct fc_function_template *ft)
1446{
1da177e4 1447 int count;
24669f75
JS		 1448 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
1449 GFP_KERNEL);
1da177e4
LT		 1450
1451 if (unlikely(!i))
1452 return NULL;
1453
1da177e4
LT		 1454 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
1455 i->t.target_attrs.ac.class = &fc_transport_class.class;
1456 i->t.target_attrs.ac.match = fc_target_match;
1457 i->t.target_size = sizeof(struct fc_starget_attrs);
1458 transport_container_register(&i->t.target_attrs);
1459
1460 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1461 i->t.host_attrs.ac.class = &fc_host_class.class;
1462 i->t.host_attrs.ac.match = fc_host_match;
1463 i->t.host_size = sizeof(struct fc_host_attrs);
1464 if (ft->get_fc_host_stats)
1465 i->t.host_attrs.statistics = &fc_statistics_group;
1466 transport_container_register(&i->t.host_attrs);
1467
1468 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
1469 i->rport_attr_cont.ac.class = &fc_rport_class.class;
1470 i->rport_attr_cont.ac.match = fc_rport_match;
1471 transport_container_register(&i->rport_attr_cont);
1472
1473 i->f = ft;
1474
1475 /* Transport uses the shost workq for scsi scanning */
1476 i->t.create_work_queue = 1;
5c44cd2a 1477
c829c394
JS		 1478 i->t.eh_timed_out = fc_timed_out;
1479
e02f3f59 1480 i->t.user_scan = fc_user_scan;
1da177e4
LT		 1481
1482 /*
1483 * Setup SCSI Target Attributes.
1484 */
1485 count = 0;
1486 SETUP_STARGET_ATTRIBUTE_RD(node_name);
1487 SETUP_STARGET_ATTRIBUTE_RD(port_name);
1488 SETUP_STARGET_ATTRIBUTE_RD(port_id);
1489
1490 BUG_ON(count > FC_STARGET_NUM_ATTRS);
1491
1492 i->starget_attrs[count] = NULL;
1493
1494
1495 /*
1496 * Setup SCSI Host Attributes.
1497 */
1498 count=0;
1499 SETUP_HOST_ATTRIBUTE_RD(node_name);
1500 SETUP_HOST_ATTRIBUTE_RD(port_name);
6b7281d0 1501 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1da177e4
LT		 1502 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
1503 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1da177e4
LT		 1504 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
1505 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
1506 SETUP_HOST_ATTRIBUTE_RD(serial_number);
1507
1508 SETUP_HOST_ATTRIBUTE_RD(port_id);
1509 SETUP_HOST_ATTRIBUTE_RD(port_type);
1510 SETUP_HOST_ATTRIBUTE_RD(port_state);
1511 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
1512 SETUP_HOST_ATTRIBUTE_RD(speed);
1513 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
016131b8 1514 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
b8d08210 1515 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
1da177e4
LT		 1516
1517 /* Transport-managed attributes */
1518 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
91ca7b01
AV		 1519 if (ft->issue_fc_host_lip)
1520 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
1da177e4
LT		 1521
1522 BUG_ON(count > FC_HOST_NUM_ATTRS);
1523
1524 i->host_attrs[count] = NULL;
1525
1526 /*
1527 * Setup Remote Port Attributes.
1528 */
1529 count=0;
1530 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
1531 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
1532 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
1533 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
1534 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
1535 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
1536 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
1537 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
1538 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
0f29b966
JS		 1539 if (ft->terminate_rport_io)
1540 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
1da177e4
LT		 1541
1542 BUG_ON(count > FC_RPORT_NUM_ATTRS);
1543
1544 i->rport_attrs[count] = NULL;
1545
1546 return &i->t;
1547}
1548EXPORT_SYMBOL(fc_attach_transport);
1549
1550void fc_release_transport(struct scsi_transport_template *t)
1551{
1552 struct fc_internal *i = to_fc_internal(t);
1553
1554 transport_container_unregister(&i->t.target_attrs);
1555 transport_container_unregister(&i->t.host_attrs);
1556 transport_container_unregister(&i->rport_attr_cont);
1557
1558 kfree(i);
1559}
1560EXPORT_SYMBOL(fc_release_transport);
1561
aedf3497
JS		 1562/**
1563 * fc_queue_work - Queue work to the fc_host workqueue.
1564 * @shost: Pointer to Scsi_Host bound to fc_host.
1565 * @work: Work to queue for execution.
1566 *
1567 * Return value:
a0785edf
JS		 1568 * 1 - work queued for execution
1569 * 0 - work is already queued
1570 * -EINVAL - work queue doesn't exist
aedf3497
JS		 1571 **/
1572static int
1573fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
1574{
1575 if (unlikely(!fc_host_work_q(shost))) {
1576 printk(KERN_ERR
1577 "ERROR: FC host '%s' attempted to queue work, "
1578 "when no workqueue created.\n", shost->hostt->name);
1579 dump_stack();
1580
1581 return -EINVAL;
1582 }
1583
1584 return queue_work(fc_host_work_q(shost), work);
1585}
1586
1587/**
1588 * fc_flush_work - Flush a fc_host's workqueue.
1589 * @shost: Pointer to Scsi_Host bound to fc_host.
1590 **/
1591static void
1592fc_flush_work(struct Scsi_Host *shost)
1593{
1594 if (!fc_host_work_q(shost)) {
1595 printk(KERN_ERR
1596 "ERROR: FC host '%s' attempted to flush work, "
1597 "when no workqueue created.\n", shost->hostt->name);
1598 dump_stack();
1599 return;
1600 }
1601
1602 flush_workqueue(fc_host_work_q(shost));
1603}
1604
1605/**
1606 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
1607 * @shost: Pointer to Scsi_Host bound to fc_host.
1608 * @work: Work to queue for execution.
1609 * @delay: jiffies to delay the work queuing
1610 *
1611 * Return value:
0f29b966 1612 * 1 on success / 0 already queued / < 0 for error
aedf3497
JS		 1613 **/
1614static int
c4028958 1615fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
aedf3497
JS		 1616 unsigned long delay)
1617{
1618 if (unlikely(!fc_host_devloss_work_q(shost))) {
1619 printk(KERN_ERR
1620 "ERROR: FC host '%s' attempted to queue work, "
1621 "when no workqueue created.\n", shost->hostt->name);
1622 dump_stack();
1623
1624 return -EINVAL;
1625 }
1626
1627 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
1628}
1629
1630/**
1631 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
1632 * @shost: Pointer to Scsi_Host bound to fc_host.
1633 **/
1634static void
1635fc_flush_devloss(struct Scsi_Host *shost)
1636{
1637 if (!fc_host_devloss_work_q(shost)) {
1638 printk(KERN_ERR
1639 "ERROR: FC host '%s' attempted to flush work, "
1640 "when no workqueue created.\n", shost->hostt->name);
1641 dump_stack();
1642 return;
1643 }
1644
1645 flush_workqueue(fc_host_devloss_work_q(shost));
1646}
1647
1da177e4
LT		 1648
1649/**
1650 * fc_remove_host - called to terminate any fc_transport-related elements
1651 * for a scsi host.
1652 * @rport: remote port to be unblocked.
1653 *
1654 * This routine is expected to be called immediately preceeding the
1655 * a driver's call to scsi_remove_host().
1656 *
1657 * WARNING: A driver utilizing the fc_transport, which fails to call
1658 * this routine prior to scsi_remote_host(), will leave dangling
1659 * objects in /sys/class/fc_remote_ports. Access to any of these
1660 * objects can result in a system crash !!!
1661 *
1662 * Notes:
1663 * This routine assumes no locks are held on entry.
1664 **/
1665void
1666fc_remove_host(struct Scsi_Host *shost)
1667{
1668 struct fc_rport *rport, *next_rport;
aedf3497
JS		 1669 struct workqueue_struct *work_q;
1670 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 1671
1672 /* Remove any remote ports */
1673 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 1674 &fc_host->rports, peers) {
1675 list_del(&rport->peers);
1676 rport->port_state = FC_PORTSTATE_DELETED;
1677 fc_queue_work(shost, &rport->rport_delete_work);
1678 }
1679
1da177e4 1680 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 1681 &fc_host->rport_bindings, peers) {
1682 list_del(&rport->peers);
1683 rport->port_state = FC_PORTSTATE_DELETED;
1684 fc_queue_work(shost, &rport->rport_delete_work);
1685 }
1686
1687 /* flush all scan work items */
1688 scsi_flush_work(shost);
1689
1690 /* flush all stgt delete, and rport delete work items, then kill it */
1691 if (fc_host->work_q) {
1692 work_q = fc_host->work_q;
1693 fc_host->work_q = NULL;
1694 destroy_workqueue(work_q);
1695 }
1696
1697 /* flush all devloss work items, then kill it */
1698 if (fc_host->devloss_work_q) {
1699 work_q = fc_host->devloss_work_q;
1700 fc_host->devloss_work_q = NULL;
1701 destroy_workqueue(work_q);
1702 }
1da177e4
LT		 1703}
1704EXPORT_SYMBOL(fc_remove_host);
1705
aedf3497
JS		 1706
1707/**
1708 * fc_starget_delete - called to delete the scsi decendents of an rport
1709 * (target and all sdevs)
1710 *
c4028958 1711 * @work: remote port to be operated on.
aedf3497 1712 **/
19a7b4ae 1713static void
c4028958 1714fc_starget_delete(struct work_struct *work)
19a7b4ae 1715{
c4028958
DH		 1716 struct fc_rport *rport =
1717 container_of(work, struct fc_rport, stgt_delete_work);
19a7b4ae 1718 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 1719 unsigned long flags;
0f29b966
JS		 1720 struct fc_internal *i = to_fc_internal(shost->transportt);
1721
1722 /*
1723 * Involve the LLDD if possible. All io on the rport is to
1724 * be terminated, either as part of the dev_loss_tmo callback
1725 * processing, or via the terminate_rport_io function.
1726 */
1727 if (i->f->dev_loss_tmo_callbk)
1728 i->f->dev_loss_tmo_callbk(rport);
1729 else if (i->f->terminate_rport_io)
1730 i->f->terminate_rport_io(rport);
19a7b4ae 1731
aedf3497
JS		 1732 spin_lock_irqsave(shost->host_lock, flags);
1733 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
1734 spin_unlock_irqrestore(shost->host_lock, flags);
0f29b966
JS		 1735 if (!cancel_delayed_work(&rport->fail_io_work))
1736 fc_flush_devloss(shost);
aedf3497
JS		 1737 if (!cancel_delayed_work(&rport->dev_loss_work))
1738 fc_flush_devloss(shost);
1739 spin_lock_irqsave(shost->host_lock, flags);
1740 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
1741 }
1742 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC		 1743
1744 scsi_remove_target(&rport->dev);
1745}
1746
aedf3497
JS		 1747
1748/**
1749 * fc_rport_final_delete - finish rport termination and delete it.
1750 *
c4028958 1751 * @work: remote port to be deleted.
aedf3497
JS		 1752 **/
1753static void
c4028958 1754fc_rport_final_delete(struct work_struct *work)
aedf3497 1755{
c4028958
DH		 1756 struct fc_rport *rport =
1757 container_of(work, struct fc_rport, rport_delete_work);
aedf3497
JS		 1758 struct device *dev = &rport->dev;
1759 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 1760 struct fc_internal *i = to_fc_internal(shost->transportt);
aedf3497
JS		 1761
1762 /*
1763 * if a scan is pending, flush the SCSI Host work_q so that
1764 * that we can reclaim the rport scan work element.
1765 */
1766 if (rport->flags & FC_RPORT_SCAN_PENDING)
1767 scsi_flush_work(shost);
1768
0f29b966
JS		 1769 /* Delete SCSI target and sdevs */
1770 if (rport->scsi_target_id != -1)
c4028958 1771 fc_starget_delete(&rport->stgt_delete_work);
0f29b966
JS		 1772 else if (i->f->dev_loss_tmo_callbk)
1773 i->f->dev_loss_tmo_callbk(rport);
1774 else if (i->f->terminate_rport_io)
1775 i->f->terminate_rport_io(rport);
1776
aedf3497
JS		 1777 transport_remove_device(dev);
1778 device_del(dev);
1779 transport_destroy_device(dev);
3bdad7bd
JS		 1780 put_device(&shost->shost_gendev); /* for fc_host->rport list */
1781 put_device(dev); /* for self-reference */
aedf3497
JS		 1782}
1783
1784
1da177e4
LT		 1785/**
1786 * fc_rport_create - allocates and creates a remote FC port.
1787 * @shost: scsi host the remote port is connected to.
1788 * @channel: Channel on shost port connected to.
1789 * @ids: The world wide names, fc address, and FC4 port
1790 * roles for the remote port.
1791 *
1792 * Allocates and creates the remoter port structure, including the
1793 * class and sysfs creation.
1794 *
1795 * Notes:
1796 * This routine assumes no locks are held on entry.
1797 **/
1798struct fc_rport *
1799fc_rport_create(struct Scsi_Host *shost, int channel,
1800 struct fc_rport_identifiers *ids)
1801{
aedf3497 1802 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 1803 struct fc_internal *fci = to_fc_internal(shost->transportt);
1804 struct fc_rport *rport;
1805 struct device *dev;
1806 unsigned long flags;
1807 int error;
1808 size_t size;
1809
1810 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
24669f75 1811 rport = kzalloc(size, GFP_KERNEL);
1da177e4
LT		 1812 if (unlikely(!rport)) {
1813 printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
1814 return NULL;
1815 }
1da177e4
LT		 1816
1817 rport->maxframe_size = -1;
1818 rport->supported_classes = FC_COS_UNSPECIFIED;
1819 rport->dev_loss_tmo = fc_dev_loss_tmo;
1820 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
1821 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
1822 rport->port_id = ids->port_id;
1823 rport->roles = ids->roles;
1824 rport->port_state = FC_PORTSTATE_ONLINE;
1825 if (fci->f->dd_fcrport_size)
1826 rport->dd_data = &rport[1];
1827 rport->channel = channel;
0f29b966 1828 rport->fast_io_fail_tmo = -1;
1da177e4 1829
c4028958
DH		 1830 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
1831 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
1832 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
1833 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
1834 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
1da177e4
LT		 1835
1836 spin_lock_irqsave(shost->host_lock, flags);
1837
1838 rport->number = fc_host->next_rport_number++;
1839 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1840 rport->scsi_target_id = fc_host->next_target_id++;
1841 else
1842 rport->scsi_target_id = -1;
aedf3497 1843 list_add_tail(&rport->peers, &fc_host->rports);
3bdad7bd 1844 get_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 1845
1846 spin_unlock_irqrestore(shost->host_lock, flags);
1847
1848 dev = &rport->dev;
3bdad7bd
JS		 1849 device_initialize(dev); /* takes self reference */
1850 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
1da177e4
LT		 1851 dev->release = fc_rport_dev_release;
1852 sprintf(dev->bus_id, "rport-%d:%d-%d",
1853 shost->host_no, channel, rport->number);
1854 transport_setup_device(dev);
1855
1856 error = device_add(dev);
1857 if (error) {
1858 printk(KERN_ERR "FC Remote Port device_add failed\n");
1859 goto delete_rport;
1860 }
1861 transport_add_device(dev);
1862 transport_configure_device(dev);
1863
aedf3497 1864 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
1da177e4 1865 /* initiate a scan of the target */
aedf3497 1866 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 1867 scsi_queue_work(shost, &rport->scan_work);
aedf3497 1868 }
1da177e4
LT		 1869
1870 return rport;
1871
1872delete_rport:
1873 transport_destroy_device(dev);
1da177e4
LT		 1874 spin_lock_irqsave(shost->host_lock, flags);
1875 list_del(&rport->peers);
3bdad7bd 1876 put_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 1877 spin_unlock_irqrestore(shost->host_lock, flags);
1878 put_device(dev->parent);
1879 kfree(rport);
1880 return NULL;
1881}
1882
1883/**
1884 * fc_remote_port_add - notifies the fc transport of the existence
1885 * of a remote FC port.
1886 * @shost: scsi host the remote port is connected to.
1887 * @channel: Channel on shost port connected to.
1888 * @ids: The world wide names, fc address, and FC4 port
1889 * roles for the remote port.
1890 *
1891 * The LLDD calls this routine to notify the transport of the existence
1892 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
1893 * of the port, it's FC address (port_id), and the FC4 roles that are
1894 * active for the port.
1895 *
1896 * For ports that are FCP targets (aka scsi targets), the FC transport
1897 * maintains consistent target id bindings on behalf of the LLDD.
1898 * A consistent target id binding is an assignment of a target id to
1899 * a remote port identifier, which persists while the scsi host is
1900 * attached. The remote port can disappear, then later reappear, and
1901 * it's target id assignment remains the same. This allows for shifts
1902 * in FC addressing (if binding by wwpn or wwnn) with no apparent
1903 * changes to the scsi subsystem which is based on scsi host number and
1904 * target id values. Bindings are only valid during the attachment of
1905 * the scsi host. If the host detaches, then later re-attaches, target
1906 * id bindings may change.
1907 *
1908 * This routine is responsible for returning a remote port structure.
1909 * The routine will search the list of remote ports it maintains
1910 * internally on behalf of consistent target id mappings. If found, the
1911 * remote port structure will be reused. Otherwise, a new remote port
1912 * structure will be allocated.
1913 *
1914 * Whenever a remote port is allocated, a new fc_remote_port class
1915 * device is created.
1916 *
1917 * Should not be called from interrupt context.
1918 *
1919 * Notes:
1920 * This routine assumes no locks are held on entry.
1921 **/
1922struct fc_rport *
1923fc_remote_port_add(struct Scsi_Host *shost, int channel,
1924 struct fc_rport_identifiers *ids)
1925{
19a7b4ae 1926 struct fc_internal *fci = to_fc_internal(shost->transportt);
aedf3497 1927 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 1928 struct fc_rport *rport;
1929 unsigned long flags;
1930 int match = 0;
1931
aedf3497
JS		 1932 /* ensure any stgt delete functions are done */
1933 fc_flush_work(shost);
1934
19a7b4ae
JSEC		 1935 /*
1936 * Search the list of "active" rports, for an rport that has been
1937 * deleted, but we've held off the real delete while the target
1938 * is in a "blocked" state.
1939 */
1940 spin_lock_irqsave(shost->host_lock, flags);
1941
aedf3497 1942 list_for_each_entry(rport, &fc_host->rports, peers) {
19a7b4ae
JSEC		 1943
1944 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
1945 (rport->channel == channel)) {
1946
aedf3497 1947 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 1948 case FC_TGTID_BIND_BY_WWPN:
1949 case FC_TGTID_BIND_NONE:
1950 if (rport->port_name == ids->port_name)
1951 match = 1;
1952 break;
1953 case FC_TGTID_BIND_BY_WWNN:
1954 if (rport->node_name == ids->node_name)
1955 match = 1;
1956 break;
1957 case FC_TGTID_BIND_BY_ID:
1958 if (rport->port_id == ids->port_id)
1959 match = 1;
1960 break;
1961 }
1962
1963 if (match) {
c4028958 1964 struct delayed_work *work =
19a7b4ae
JSEC		 1965 &rport->dev_loss_work;
1966
1967 memcpy(&rport->node_name, &ids->node_name,
1968 sizeof(rport->node_name));
1969 memcpy(&rport->port_name, &ids->port_name,
1970 sizeof(rport->port_name));
1971 rport->port_id = ids->port_id;
1972
1973 rport->port_state = FC_PORTSTATE_ONLINE;
1974 rport->roles = ids->roles;
1975
1976 spin_unlock_irqrestore(shost->host_lock, flags);
1977
1978 if (fci->f->dd_fcrport_size)
1979 memset(rport->dd_data, 0,
1980 fci->f->dd_fcrport_size);
1981
1982 /*
1983 * If we were blocked, we were a target.
1984 * If no longer a target, we leave the timer
1985 * running in case the port changes roles
1986 * prior to the timer expiring. If the timer
1987 * fires, the target will be torn down.
1988 */
1989 if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET))
1990 return rport;
1991
1992 /* restart the target */
1993
1994 /*
0f29b966 1995 * Stop the target timers first. Take no action
19a7b4ae
JSEC		 1996 * on the del_timer failure as the state
1997 * machine state change will validate the
1998 * transaction.
1999 */
0f29b966
JS		 2000 if (!cancel_delayed_work(&rport->fail_io_work))
2001 fc_flush_devloss(shost);
19a7b4ae 2002 if (!cancel_delayed_work(work))
aedf3497
JS		 2003 fc_flush_devloss(shost);
2004
2005 spin_lock_irqsave(shost->host_lock, flags);
2006
2007 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
19a7b4ae
JSEC		 2008
2009 /* initiate a scan of the target */
aedf3497 2010 rport->flags |= FC_RPORT_SCAN_PENDING;
19a7b4ae
JSEC		 2011 scsi_queue_work(shost, &rport->scan_work);
2012
aedf3497
JS		 2013 spin_unlock_irqrestore(shost->host_lock, flags);
2014
a0785edf
JS		 2015 scsi_target_unblock(&rport->dev);
2016
19a7b4ae
JSEC		 2017 return rport;
2018 }
2019 }
2020 }
2021
2022 /* Search the bindings array */
aedf3497 2023 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
1da177e4
LT		 2024
2025 /* search for a matching consistent binding */
2026
aedf3497 2027 list_for_each_entry(rport, &fc_host->rport_bindings,
1da177e4
LT		 2028 peers) {
2029 if (rport->channel != channel)
2030 continue;
2031
aedf3497 2032 switch (fc_host->tgtid_bind_type) {
1da177e4
LT		 2033 case FC_TGTID_BIND_BY_WWPN:
2034 if (rport->port_name == ids->port_name)
2035 match = 1;
2036 break;
2037 case FC_TGTID_BIND_BY_WWNN:
2038 if (rport->node_name == ids->node_name)
2039 match = 1;
2040 break;
2041 case FC_TGTID_BIND_BY_ID:
2042 if (rport->port_id == ids->port_id)
2043 match = 1;
2044 break;
2045 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2046 break;
2047 }
2048
2049 if (match) {
aedf3497 2050 list_move_tail(&rport->peers, &fc_host->rports);
1da177e4
LT		 2051 break;
2052 }
2053 }
2054
1da177e4
LT		 2055 if (match) {
2056 memcpy(&rport->node_name, &ids->node_name,
2057 sizeof(rport->node_name));
2058 memcpy(&rport->port_name, &ids->port_name,
2059 sizeof(rport->port_name));
2060 rport->port_id = ids->port_id;
2061 rport->roles = ids->roles;
2062 rport->port_state = FC_PORTSTATE_ONLINE;
2063
19a7b4ae
JSEC		 2064 if (fci->f->dd_fcrport_size)
2065 memset(rport->dd_data, 0,
2066 fci->f->dd_fcrport_size);
2067
aedf3497 2068 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
1da177e4 2069 /* initiate a scan of the target */
aedf3497 2070 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2071 scsi_queue_work(shost, &rport->scan_work);
a0785edf
JS		 2072 spin_unlock_irqrestore(shost->host_lock, flags);
2073 scsi_target_unblock(&rport->dev);
2074 } else
2075 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2076
2077 return rport;
2078 }
2079 }
2080
19a7b4ae
JSEC		 2081 spin_unlock_irqrestore(shost->host_lock, flags);
2082
1da177e4
LT		 2083 /* No consistent binding found - create new remote port entry */
2084 rport = fc_rport_create(shost, channel, ids);
2085
2086 return rport;
2087}
2088EXPORT_SYMBOL(fc_remote_port_add);
2089
1da177e4
LT		 2090
2091/**
2092 * fc_remote_port_delete - notifies the fc transport that a remote
2093 * port is no longer in existence.
2094 * @rport: The remote port that no longer exists
2095 *
2096 * The LLDD calls this routine to notify the transport that a remote
2097 * port is no longer part of the topology. Note: Although a port
2098 * may no longer be part of the topology, it may persist in the remote
19a7b4ae
JSEC		 2099 * ports displayed by the fc_host. We do this under 2 conditions:
2100 * - If the port was a scsi target, we delay its deletion by "blocking" it.
2101 * This allows the port to temporarily disappear, then reappear without
2102 * disrupting the SCSI device tree attached to it. During the "blocked"
2103 * period the port will still exist.
2104 * - If the port was a scsi target and disappears for longer than we
2105 * expect, we'll delete the port and the tear down the SCSI device tree
2106 * attached to it. However, we want to semi-persist the target id assigned
2107 * to that port if it eventually does exist. The port structure will
2108 * remain (although with minimal information) so that the target id
2109 * bindings remails.
1da177e4
LT		 2110 *
2111 * If the remote port is not an FCP Target, it will be fully torn down
2112 * and deallocated, including the fc_remote_port class device.
2113 *
19a7b4ae
JSEC		 2114 * If the remote port is an FCP Target, the port will be placed in a
2115 * temporary blocked state. From the LLDD's perspective, the rport no
2116 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2117 * exists, but all sdevs on it are blocked from further I/O. The following
2118 * is then expected:
2119 * If the remote port does not return (signaled by a LLDD call to
2120 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2121 * scsi target is removed - killing all outstanding i/o and removing the
2122 * scsi devices attached ot it. The port structure will be marked Not
2123 * Present and be partially cleared, leaving only enough information to
2124 * recognize the remote port relative to the scsi target id binding if
2125 * it later appears. The port will remain as long as there is a valid
2126 * binding (e.g. until the user changes the binding type or unloads the
2127 * scsi host with the binding).
1da177e4 2128 *
19a7b4ae
JSEC		 2129 * If the remote port returns within the dev_loss_tmo value (and matches
2130 * according to the target id binding type), the port structure will be
2131 * reused. If it is no longer a SCSI target, the target will be torn
2132 * down. If it continues to be a SCSI target, then the target will be
2133 * unblocked (allowing i/o to be resumed), and a scan will be activated
2134 * to ensure that all luns are detected.
2135 *
2136 * Called from normal process context only - cannot be called from interrupt.
1da177e4
LT		 2137 *
2138 * Notes:
2139 * This routine assumes no locks are held on entry.
2140 **/
2141void
2142fc_remote_port_delete(struct fc_rport *rport)
2143{
aedf3497 2144 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2145 struct fc_internal *i = to_fc_internal(shost->transportt);
19a7b4ae 2146 int timeout = rport->dev_loss_tmo;
aedf3497
JS		 2147 unsigned long flags;
2148
2149 /*
2150 * No need to flush the fc_host work_q's, as all adds are synchronous.
2151 *
2152 * We do need to reclaim the rport scan work element, so eventually
2153 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2154 * there's still a scan pending.
2155 */
2156
2157 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2158
19a7b4ae
JSEC		 2159 /* If no scsi target id mapping, delete it */
2160 if (rport->scsi_target_id == -1) {
aedf3497
JS		 2161 list_del(&rport->peers);
2162 rport->port_state = FC_PORTSTATE_DELETED;
2163 fc_queue_work(shost, &rport->rport_delete_work);
2164 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2165 return;
2166 }
2167
aedf3497
JS		 2168 rport->port_state = FC_PORTSTATE_BLOCKED;
2169
2170 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2171
2172 spin_unlock_irqrestore(shost->host_lock, flags);
2173
19a7b4ae 2174 scsi_target_block(&rport->dev);
1da177e4 2175
0f29b966
JS		 2176 /* see if we need to kill io faster than waiting for device loss */
2177 if ((rport->fast_io_fail_tmo != -1) &&
2178 (rport->fast_io_fail_tmo < timeout) && (i->f->terminate_rport_io))
2179 fc_queue_devloss_work(shost, &rport->fail_io_work,
2180 rport->fast_io_fail_tmo * HZ);
2181
19a7b4ae 2182 /* cap the length the devices can be blocked until they are deleted */
aedf3497 2183 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
1da177e4
LT		 2184}
2185EXPORT_SYMBOL(fc_remote_port_delete);
2186
2187/**
2188 * fc_remote_port_rolechg - notifies the fc transport that the roles
2189 * on a remote may have changed.
2190 * @rport: The remote port that changed.
2191 *
2192 * The LLDD calls this routine to notify the transport that the roles
2193 * on a remote port may have changed. The largest effect of this is
2194 * if a port now becomes a FCP Target, it must be allocated a
2195 * scsi target id. If the port is no longer a FCP target, any
2196 * scsi target id value assigned to it will persist in case the
2197 * role changes back to include FCP Target. No changes in the scsi
2198 * midlayer will be invoked if the role changes (in the expectation
2199 * that the role will be resumed. If it doesn't normal error processing
2200 * will take place).
2201 *
2202 * Should not be called from interrupt context.
2203 *
2204 * Notes:
2205 * This routine assumes no locks are held on entry.
2206 **/
2207void
2208fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
2209{
2210 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 2211 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2212 unsigned long flags;
2213 int create = 0;
2214
1da177e4 2215 spin_lock_irqsave(shost->host_lock, flags);
19a7b4ae
JSEC		 2216 if (roles & FC_RPORT_ROLE_FCP_TARGET) {
2217 if (rport->scsi_target_id == -1) {
2218 rport->scsi_target_id = fc_host->next_target_id++;
2219 create = 1;
2220 } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET))
2221 create = 1;
1da177e4 2222 }
1da177e4 2223
19a7b4ae
JSEC		 2224 rport->roles = roles;
2225
aedf3497
JS		 2226 spin_unlock_irqrestore(shost->host_lock, flags);
2227
19a7b4ae
JSEC		 2228 if (create) {
2229 /*
2230 * There may have been a delete timer running on the
2231 * port. Ensure that it is cancelled as we now know
2232 * the port is an FCP Target.
2233 * Note: we know the rport is exists and in an online
2234 * state as the LLDD would not have had an rport
2235 * reference to pass us.
2236 *
2237 * Take no action on the del_timer failure as the state
2238 * machine state change will validate the
2239 * transaction.
2240 */
0f29b966
JS		 2241 if (!cancel_delayed_work(&rport->fail_io_work))
2242 fc_flush_devloss(shost);
19a7b4ae 2243 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2244 fc_flush_devloss(shost);
2245
2246 spin_lock_irqsave(shost->host_lock, flags);
2247 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2248 spin_unlock_irqrestore(shost->host_lock, flags);
2249
2250 /* ensure any stgt delete functions are done */
2251 fc_flush_work(shost);
19a7b4ae 2252
1da177e4 2253 /* initiate a scan of the target */
aedf3497
JS		 2254 spin_lock_irqsave(shost->host_lock, flags);
2255 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2256 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2257 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf 2258 scsi_target_unblock(&rport->dev);
19a7b4ae 2259 }
1da177e4
LT		 2260}
2261EXPORT_SYMBOL(fc_remote_port_rolechg);
2262
2263/**
19a7b4ae
JSEC		 2264 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that
2265 * was a SCSI target (thus was blocked), and failed
2266 * to return in the alloted time.
2267 *
c4028958 2268 * @work: rport target that failed to reappear in the alloted time.
1da177e4
LT		 2269 **/
2270static void
c4028958 2271fc_timeout_deleted_rport(struct work_struct *work)
1da177e4 2272{
c4028958
DH		 2273 struct fc_rport *rport =
2274 container_of(work, struct fc_rport, dev_loss_work.work);
19a7b4ae 2275 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 2276 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
19a7b4ae 2277 unsigned long flags;
1da177e4 2278
19a7b4ae 2279 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2280
aedf3497
JS		 2281 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2282
1da177e4 2283 /*
aedf3497
JS		 2284 * If the port is ONLINE, then it came back. Validate it's still an
2285 * FCP target. If not, tear down the scsi_target on it.
1da177e4 2286 */
aedf3497
JS		 2287 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
2288 !(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
19a7b4ae 2289 dev_printk(KERN_ERR, &rport->dev,
aedf3497
JS		 2290 "blocked FC remote port time out: no longer"
2291 " a FCP target, removing starget\n");
aedf3497 2292 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf
JS		 2293 scsi_target_unblock(&rport->dev);
2294 fc_queue_work(shost, &rport->stgt_delete_work);
19a7b4ae
JSEC		 2295 return;
2296 }
1da177e4 2297
19a7b4ae
JSEC		 2298 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
2299 spin_unlock_irqrestore(shost->host_lock, flags);
2300 dev_printk(KERN_ERR, &rport->dev,
2301 "blocked FC remote port time out: leaving target alone\n");
2302 return;
2303 }
1da177e4 2304
aedf3497
JS		 2305 if (fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) {
2306 list_del(&rport->peers);
2307 rport->port_state = FC_PORTSTATE_DELETED;
19a7b4ae
JSEC		 2308 dev_printk(KERN_ERR, &rport->dev,
2309 "blocked FC remote port time out: removing target\n");
aedf3497
JS		 2310 fc_queue_work(shost, &rport->rport_delete_work);
2311 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC		 2312 return;
2313 }
1da177e4 2314
19a7b4ae
JSEC		 2315 dev_printk(KERN_ERR, &rport->dev,
2316 "blocked FC remote port time out: removing target and "
2317 "saving binding\n");
2318
aedf3497 2319 list_move_tail(&rport->peers, &fc_host->rport_bindings);
1da177e4
LT		 2320
2321 /*
19a7b4ae
JSEC		 2322 * Note: We do not remove or clear the hostdata area. This allows
2323 * host-specific target data to persist along with the
2324 * scsi_target_id. It's up to the host to manage it's hostdata area.
1da177e4 2325 */
1da177e4 2326
19a7b4ae
JSEC		 2327 /*
2328 * Reinitialize port attributes that may change if the port comes back.
2329 */
2330 rport->maxframe_size = -1;
2331 rport->supported_classes = FC_COS_UNSPECIFIED;
2332 rport->roles = FC_RPORT_ROLE_UNKNOWN;
aedf3497 2333 rport->port_state = FC_PORTSTATE_NOTPRESENT;
1da177e4 2334
19a7b4ae 2335 /* remove the identifiers that aren't used in the consisting binding */
aedf3497 2336 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 2337 case FC_TGTID_BIND_BY_WWPN:
2338 rport->node_name = -1;
2339 rport->port_id = -1;
2340 break;
2341 case FC_TGTID_BIND_BY_WWNN:
2342 rport->port_name = -1;
2343 rport->port_id = -1;
2344 break;
2345 case FC_TGTID_BIND_BY_ID:
2346 rport->node_name = -1;
2347 rport->port_name = -1;
2348 break;
2349 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2350 break;
2351 }
2352
19a7b4ae
JSEC		 2353 /*
2354 * As this only occurs if the remote port (scsi target)
2355 * went away and didn't come back - we'll remove
2356 * all attached scsi devices.
2357 */
42e33148 2358 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf
JS		 2359
2360 scsi_target_unblock(&rport->dev);
2361 fc_queue_work(shost, &rport->stgt_delete_work);
1da177e4 2362}
1da177e4 2363
0f29b966
JS		 2364/**
2365 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a
2366 * disconnected SCSI target.
2367 *
c4028958 2368 * @work: rport to terminate io on.
0f29b966
JS		 2369 *
2370 * Notes: Only requests the failure of the io, not that all are flushed
2371 * prior to returning.
2372 **/
2373static void
c4028958 2374fc_timeout_fail_rport_io(struct work_struct *work)
0f29b966 2375{
c4028958
DH		 2376 struct fc_rport *rport =
2377 container_of(work, struct fc_rport, fail_io_work.work);
0f29b966
JS		 2378 struct Scsi_Host *shost = rport_to_shost(rport);
2379 struct fc_internal *i = to_fc_internal(shost->transportt);
2380
2381 if (rport->port_state != FC_PORTSTATE_BLOCKED)
2382 return;
2383
2384 i->f->terminate_rport_io(rport);
2385}
2386
1da177e4
LT		 2387/**
2388 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
19a7b4ae 2389 *
c4028958 2390 * @work: remote port to be scanned.
1da177e4
LT		 2391 **/
2392static void
c4028958 2393fc_scsi_scan_rport(struct work_struct *work)
1da177e4 2394{
c4028958
DH		 2395 struct fc_rport *rport =
2396 container_of(work, struct fc_rport, scan_work);
aedf3497 2397 struct Scsi_Host *shost = rport_to_shost(rport);
42e33148
JSEC		 2398 unsigned long flags;
2399
aedf3497
JS		 2400 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
2401 (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
aedf3497
JS		 2402 scsi_scan_target(&rport->dev, rport->channel,
2403 rport->scsi_target_id, SCAN_WILD_CARD, 1);
42e33148 2404 }
aedf3497
JS		 2405
2406 spin_lock_irqsave(shost->host_lock, flags);
2407 rport->flags &= ~FC_RPORT_SCAN_PENDING;
42e33148
JSEC		 2408 spin_unlock_irqrestore(shost->host_lock, flags);
2409}
2410
2411
1da177e4
LT		 2412MODULE_AUTHOR("Martin Hicks");
2413MODULE_DESCRIPTION("FC Transport Attributes");
2414MODULE_LICENSE("GPL");
2415
2416module_init(fc_transport_init);
2417module_exit(fc_transport_exit);
Linux kernel - Deliverables
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