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arm: walk_stacktrace() needs to be exported
[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" },
c3d2350a
JS		 203 { FC_PORTSPEED_8GBIT, "8 Gbit" },
204 { FC_PORTSPEED_16GBIT, "16 Gbit" },
1da177e4
LT		 205 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
206};
207fc_bitfield_name_search(port_speed, fc_port_speed_names)
208
209
210static int
211show_fc_fc4s (char *buf, u8 *fc4_list)
212{
213 int i, len=0;
214
215 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
216 len += sprintf(buf + len , "0x%02x ", *fc4_list);
217 len += sprintf(buf + len, "\n");
218 return len;
219}
220
221
222/* Convert FC_RPORT_ROLE bit values to ascii string name */
0ad78200 223static const struct {
1da177e4
LT		 224 u32 value;
225 char *name;
226} fc_remote_port_role_names[] = {
227 { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" },
228 { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
229 { FC_RPORT_ROLE_IP_PORT, "IP Port" },
230};
231fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names)
232
233/*
234 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
235 */
236#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
237#define FC_WELLKNOWN_ROLE_MASK 0x00000f
238#define FC_FPORT_PORTID 0x00000e
239#define FC_FABCTLR_PORTID 0x00000d
240#define FC_DIRSRVR_PORTID 0x00000c
241#define FC_TIMESRVR_PORTID 0x00000b
242#define FC_MGMTSRVR_PORTID 0x00000a
243
244
c4028958
DH		 245static void fc_timeout_deleted_rport(struct work_struct *work);
246static void fc_timeout_fail_rport_io(struct work_struct *work);
247static void fc_scsi_scan_rport(struct work_struct *work);
1da177e4
LT		 248
249/*
250 * Attribute counts pre object type...
251 * Increase these values if you add attributes
252 */
253#define FC_STARGET_NUM_ATTRS 3
0f29b966 254#define FC_RPORT_NUM_ATTRS 10
ad139a2f 255#define FC_HOST_NUM_ATTRS 17
1da177e4
LT		 256
257struct fc_internal {
258 struct scsi_transport_template t;
259 struct fc_function_template *f;
260
261 /*
262 * For attributes : each object has :
263 * An array of the actual attributes structures
264 * An array of null-terminated pointers to the attribute
265 * structures - used for mid-layer interaction.
266 *
267 * The attribute containers for the starget and host are are
268 * part of the midlayer. As the remote port is specific to the
269 * fc transport, we must provide the attribute container.
270 */
271 struct class_device_attribute private_starget_attrs[
272 FC_STARGET_NUM_ATTRS];
273 struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
274
275 struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
276 struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
277
278 struct transport_container rport_attr_cont;
279 struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
280 struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
281};
282
283#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
284
d0a7e574
JB		 285static int fc_target_setup(struct transport_container *tc, struct device *dev,
286 struct class_device *cdev)
1da177e4
LT		 287{
288 struct scsi_target *starget = to_scsi_target(dev);
289 struct fc_rport *rport = starget_to_rport(starget);
290
291 /*
292 * if parent is remote port, use values from remote port.
293 * Otherwise, this host uses the fc_transport, but not the
294 * remote port interface. As such, initialize to known non-values.
295 */
296 if (rport) {
297 fc_starget_node_name(starget) = rport->node_name;
298 fc_starget_port_name(starget) = rport->port_name;
299 fc_starget_port_id(starget) = rport->port_id;
300 } else {
301 fc_starget_node_name(starget) = -1;
302 fc_starget_port_name(starget) = -1;
303 fc_starget_port_id(starget) = -1;
304 }
305
306 return 0;
307}
308
309static DECLARE_TRANSPORT_CLASS(fc_transport_class,
310 "fc_transport",
311 fc_target_setup,
312 NULL,
313 NULL);
314
d0a7e574
JB		 315static int fc_host_setup(struct transport_container *tc, struct device *dev,
316 struct class_device *cdev)
1da177e4
LT		 317{
318 struct Scsi_Host *shost = dev_to_shost(dev);
aedf3497 319 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 320
321 /*
322 * Set default values easily detected by the midlayer as
323 * failure cases. The scsi lldd is responsible for initializing
324 * all transport attributes to valid values per host.
325 */
aedf3497
JS		 326 fc_host->node_name = -1;
327 fc_host->port_name = -1;
328 fc_host->permanent_port_name = -1;
329 fc_host->supported_classes = FC_COS_UNSPECIFIED;
330 memset(fc_host->supported_fc4s, 0,
331 sizeof(fc_host->supported_fc4s));
aedf3497
JS		 332 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
333 fc_host->maxframe_size = -1;
334 memset(fc_host->serial_number, 0,
335 sizeof(fc_host->serial_number));
336
337 fc_host->port_id = -1;
338 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
339 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
340 memset(fc_host->active_fc4s, 0,
341 sizeof(fc_host->active_fc4s));
342 fc_host->speed = FC_PORTSPEED_UNKNOWN;
343 fc_host->fabric_name = -1;
b8d08210
JS		 344 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
345 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
aedf3497
JS		 346
347 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
348
349 INIT_LIST_HEAD(&fc_host->rports);
350 INIT_LIST_HEAD(&fc_host->rport_bindings);
351 fc_host->next_rport_number = 0;
352 fc_host->next_target_id = 0;
353
354 snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d",
355 shost->host_no);
356 fc_host->work_q = create_singlethread_workqueue(
357 fc_host->work_q_name);
358 if (!fc_host->work_q)
359 return -ENOMEM;
360
361 snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d",
362 shost->host_no);
363 fc_host->devloss_work_q = create_singlethread_workqueue(
364 fc_host->devloss_work_q_name);
365 if (!fc_host->devloss_work_q) {
366 destroy_workqueue(fc_host->work_q);
367 fc_host->work_q = NULL;
368 return -ENOMEM;
369 }
370
1da177e4
LT		 371 return 0;
372}
373
374static DECLARE_TRANSPORT_CLASS(fc_host_class,
375 "fc_host",
376 fc_host_setup,
377 NULL,
378 NULL);
379
380/*
381 * Setup and Remove actions for remote ports are handled
382 * in the service functions below.
383 */
384static DECLARE_TRANSPORT_CLASS(fc_rport_class,
385 "fc_remote_ports",
386 NULL,
387 NULL,
388 NULL);
389
390/*
391 * Module Parameters
392 */
393
394/*
395 * dev_loss_tmo: the default number of seconds that the FC transport
396 * should insulate the loss of a remote port.
397 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
398 */
1c9e16e4 399static unsigned int fc_dev_loss_tmo = 60; /* seconds */
1da177e4
LT		 400
401module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR);
402MODULE_PARM_DESC(dev_loss_tmo,
403 "Maximum number of seconds that the FC transport should"
404 " insulate the loss of a remote port. Once this value is"
405 " exceeded, the scsi target is removed. Value should be"
406 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
407
84314fd4
JS		 408/**
409 * Netlink Infrastructure
410 **/
411
412static atomic_t fc_event_seq;
413
414/**
415 * fc_get_event_number - Obtain the next sequential FC event number
416 *
417 * Notes:
418 * We could have inline'd this, but it would have required fc_event_seq to
419 * be exposed. For now, live with the subroutine call.
420 * Atomic used to avoid lock/unlock...
421 **/
422u32
423fc_get_event_number(void)
424{
425 return atomic_add_return(1, &fc_event_seq);
426}
427EXPORT_SYMBOL(fc_get_event_number);
428
429
430/**
431 * fc_host_post_event - called to post an even on an fc_host.
432 *
433 * @shost: host the event occurred on
434 * @event_number: fc event number obtained from get_fc_event_number()
435 * @event_code: fc_host event being posted
436 * @event_data: 32bits of data for the event being posted
437 *
438 * Notes:
439 * This routine assumes no locks are held on entry.
440 **/
441void
442fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
443 enum fc_host_event_code event_code, u32 event_data)
444{
445 struct sk_buff *skb;
446 struct nlmsghdr *nlh;
447 struct fc_nl_event *event;
448 const char *name;
449 u32 len, skblen;
450 int err;
451
452 if (!scsi_nl_sock) {
453 err = -ENOENT;
454 goto send_fail;
455 }
456
457 len = FC_NL_MSGALIGN(sizeof(*event));
458 skblen = NLMSG_SPACE(len);
459
460 skb = alloc_skb(skblen, GFP_KERNEL);
461 if (!skb) {
462 err = -ENOBUFS;
463 goto send_fail;
464 }
465
466 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
467 skblen - sizeof(*nlh), 0);
468 if (!nlh) {
469 err = -ENOBUFS;
470 goto send_fail_skb;
471 }
472 event = NLMSG_DATA(nlh);
473
474 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
475 FC_NL_ASYNC_EVENT, len);
476 event->seconds = get_seconds();
477 event->vendor_id = 0;
478 event->host_no = shost->host_no;
479 event->event_datalen = sizeof(u32); /* bytes */
480 event->event_num = event_number;
481 event->event_code = event_code;
482 event->event_data = event_data;
483
1b73c4bb
JB		 484 err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
485 GFP_KERNEL);
84314fd4
JS		 486 if (err && (err != -ESRCH)) /* filter no recipient errors */
487 /* nlmsg_multicast already kfree_skb'd */
488 goto send_fail;
489
490 return;
491
492send_fail_skb:
493 kfree_skb(skb);
494send_fail:
495 name = get_fc_host_event_code_name(event_code);
496 printk(KERN_WARNING
497 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
498 __FUNCTION__, shost->host_no,
499 (name) ? name : "<unknown>", event_data, err);
500 return;
501}
502EXPORT_SYMBOL(fc_host_post_event);
503
504
505/**
506 * fc_host_post_vendor_event - called to post a vendor unique event on
507 * a fc_host
508 *
509 * @shost: host the event occurred on
510 * @event_number: fc event number obtained from get_fc_event_number()
511 * @data_len: amount, in bytes, of vendor unique data
512 * @data_buf: pointer to vendor unique data
513 *
514 * Notes:
515 * This routine assumes no locks are held on entry.
516 **/
517void
518fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
f14e2e29 519 u32 data_len, char * data_buf, u64 vendor_id)
84314fd4
JS		 520{
521 struct sk_buff *skb;
522 struct nlmsghdr *nlh;
523 struct fc_nl_event *event;
524 u32 len, skblen;
525 int err;
526
527 if (!scsi_nl_sock) {
528 err = -ENOENT;
529 goto send_vendor_fail;
530 }
531
532 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
533 skblen = NLMSG_SPACE(len);
534
535 skb = alloc_skb(skblen, GFP_KERNEL);
536 if (!skb) {
537 err = -ENOBUFS;
538 goto send_vendor_fail;
539 }
540
541 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
542 skblen - sizeof(*nlh), 0);
543 if (!nlh) {
544 err = -ENOBUFS;
545 goto send_vendor_fail_skb;
546 }
547 event = NLMSG_DATA(nlh);
548
549 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
550 FC_NL_ASYNC_EVENT, len);
551 event->seconds = get_seconds();
552 event->vendor_id = vendor_id;
553 event->host_no = shost->host_no;
554 event->event_datalen = data_len; /* bytes */
555 event->event_num = event_number;
556 event->event_code = FCH_EVT_VENDOR_UNIQUE;
557 memcpy(&event->event_data, data_buf, data_len);
558
1b73c4bb
JB		 559 err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
560 GFP_KERNEL);
84314fd4
JS		 561 if (err && (err != -ESRCH)) /* filter no recipient errors */
562 /* nlmsg_multicast already kfree_skb'd */
563 goto send_vendor_fail;
564
565 return;
566
567send_vendor_fail_skb:
568 kfree_skb(skb);
569send_vendor_fail:
570 printk(KERN_WARNING
571 "%s: Dropped Event : host %d vendor_unique - err %d\n",
572 __FUNCTION__, shost->host_no, err);
573 return;
574}
575EXPORT_SYMBOL(fc_host_post_vendor_event);
576
577
1da177e4
LT		 578
579static __init int fc_transport_init(void)
580{
84314fd4
JS		 581 int error;
582
583 atomic_set(&fc_event_seq, 0);
584
585 error = transport_class_register(&fc_host_class);
1da177e4
LT		 586 if (error)
587 return error;
588 error = transport_class_register(&fc_rport_class);
589 if (error)
590 return error;
591 return transport_class_register(&fc_transport_class);
592}
593
594static void __exit fc_transport_exit(void)
595{
596 transport_class_unregister(&fc_transport_class);
597 transport_class_unregister(&fc_rport_class);
598 transport_class_unregister(&fc_host_class);
599}
600
601/*
602 * FC Remote Port Attribute Management
603 */
604
605#define fc_rport_show_function(field, format_string, sz, cast) \
606static ssize_t \
607show_fc_rport_##field (struct class_device *cdev, char *buf) \
608{ \
609 struct fc_rport *rport = transport_class_to_rport(cdev); \
610 struct Scsi_Host *shost = rport_to_shost(rport); \
611 struct fc_internal *i = to_fc_internal(shost->transportt); \
19a7b4ae
JSEC		 612 if ((i->f->get_rport_##field) && \
613 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 614 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae 615 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
1da177e4
LT		 616 i->f->get_rport_##field(rport); \
617 return snprintf(buf, sz, format_string, cast rport->field); \
618}
619
620#define fc_rport_store_function(field) \
621static ssize_t \
622store_fc_rport_##field(struct class_device *cdev, const char *buf, \
623 size_t count) \
624{ \
625 int val; \
626 struct fc_rport *rport = transport_class_to_rport(cdev); \
627 struct Scsi_Host *shost = rport_to_shost(rport); \
628 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 629 char *cp; \
19a7b4ae 630 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 631 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae
JSEC		 632 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
633 return -EBUSY; \
0f29b966
JS		 634 val = simple_strtoul(buf, &cp, 0); \
635 if (*cp && (*cp != '\n')) \
636 return -EINVAL; \
1da177e4
LT		 637 i->f->set_rport_##field(rport, val); \
638 return count; \
639}
640
641#define fc_rport_rd_attr(field, format_string, sz) \
642 fc_rport_show_function(field, format_string, sz, ) \
643static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
644 show_fc_rport_##field, NULL)
645
646#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
647 fc_rport_show_function(field, format_string, sz, (cast)) \
648static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
649 show_fc_rport_##field, NULL)
650
651#define fc_rport_rw_attr(field, format_string, sz) \
652 fc_rport_show_function(field, format_string, sz, ) \
653 fc_rport_store_function(field) \
654static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
655 show_fc_rport_##field, \
656 store_fc_rport_##field)
657
658
659#define fc_private_rport_show_function(field, format_string, sz, cast) \
660static ssize_t \
661show_fc_rport_##field (struct class_device *cdev, char *buf) \
662{ \
663 struct fc_rport *rport = transport_class_to_rport(cdev); \
664 return snprintf(buf, sz, format_string, cast rport->field); \
665}
666
667#define fc_private_rport_rd_attr(field, format_string, sz) \
668 fc_private_rport_show_function(field, format_string, sz, ) \
669static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
670 show_fc_rport_##field, NULL)
671
672#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
673 fc_private_rport_show_function(field, format_string, sz, (cast)) \
674static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
675 show_fc_rport_##field, NULL)
676
677
678#define fc_private_rport_rd_enum_attr(title, maxlen) \
679static ssize_t \
680show_fc_rport_##title (struct class_device *cdev, char *buf) \
681{ \
682 struct fc_rport *rport = transport_class_to_rport(cdev); \
683 const char *name; \
684 name = get_fc_##title##_name(rport->title); \
685 if (!name) \
686 return -EINVAL; \
687 return snprintf(buf, maxlen, "%s\n", name); \
688} \
689static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \
690 show_fc_rport_##title, NULL)
691
692
693#define SETUP_RPORT_ATTRIBUTE_RD(field) \
694 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
695 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
696 i->private_rport_attrs[count].store = NULL; \
697 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
698 if (i->f->show_rport_##field) \
699 count++
700
701#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
702 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
703 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
704 i->private_rport_attrs[count].store = NULL; \
705 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
706 count++
707
708#define SETUP_RPORT_ATTRIBUTE_RW(field) \
709 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
710 if (!i->f->set_rport_##field) { \
711 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
712 i->private_rport_attrs[count].store = NULL; \
713 } \
714 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
715 if (i->f->show_rport_##field) \
716 count++
717
0f29b966
JS		 718#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
719{ \
720 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
721 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
722 count++; \
723}
724
1da177e4
LT		 725
726/* The FC Transport Remote Port Attributes: */
727
728/* Fixed Remote Port Attributes */
729
730fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
731
732static ssize_t
733show_fc_rport_supported_classes (struct class_device *cdev, char *buf)
734{
735 struct fc_rport *rport = transport_class_to_rport(cdev);
736 if (rport->supported_classes == FC_COS_UNSPECIFIED)
737 return snprintf(buf, 20, "unspecified\n");
738 return get_fc_cos_names(rport->supported_classes, buf);
739}
740static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
741 show_fc_rport_supported_classes, NULL);
742
743/* Dynamic Remote Port Attributes */
744
19a7b4ae
JSEC		 745/*
746 * dev_loss_tmo attribute
747 */
748fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
749static ssize_t
750store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf,
751 size_t count)
752{
753 int val;
754 struct fc_rport *rport = transport_class_to_rport(cdev);
755 struct Scsi_Host *shost = rport_to_shost(rport);
756 struct fc_internal *i = to_fc_internal(shost->transportt);
0f29b966 757 char *cp;
19a7b4ae 758 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
42e33148 759 (rport->port_state == FC_PORTSTATE_DELETED) ||
19a7b4ae
JSEC		 760 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
761 return -EBUSY;
0f29b966
JS		 762 val = simple_strtoul(buf, &cp, 0);
763 if ((*cp && (*cp != '\n')) ||
764 (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
19a7b4ae
JSEC		 765 return -EINVAL;
766 i->f->set_rport_dev_loss_tmo(rport, val);
767 return count;
768}
769static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
770 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1da177e4
LT		 771
772
773/* Private Remote Port Attributes */
774
775fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
776fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
777fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
778
779static ssize_t
780show_fc_rport_roles (struct class_device *cdev, char *buf)
781{
782 struct fc_rport *rport = transport_class_to_rport(cdev);
783
784 /* identify any roles that are port_id specific */
785 if ((rport->port_id != -1) &&
786 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
787 FC_WELLKNOWN_PORTID_MASK) {
788 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
789 case FC_FPORT_PORTID:
790 return snprintf(buf, 30, "Fabric Port\n");
791 case FC_FABCTLR_PORTID:
792 return snprintf(buf, 30, "Fabric Controller\n");
793 case FC_DIRSRVR_PORTID:
794 return snprintf(buf, 30, "Directory Server\n");
795 case FC_TIMESRVR_PORTID:
796 return snprintf(buf, 30, "Time Server\n");
797 case FC_MGMTSRVR_PORTID:
798 return snprintf(buf, 30, "Management Server\n");
799 default:
800 return snprintf(buf, 30, "Unknown Fabric Entity\n");
801 }
802 } else {
803 if (rport->roles == FC_RPORT_ROLE_UNKNOWN)
804 return snprintf(buf, 20, "unknown\n");
805 return get_fc_remote_port_roles_names(rport->roles, buf);
806 }
807}
808static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO,
809 show_fc_rport_roles, NULL);
810
811fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
812fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
813
0f29b966
JS		 814/*
815 * fast_io_fail_tmo attribute
816 */
817static ssize_t
818show_fc_rport_fast_io_fail_tmo (struct class_device *cdev, char *buf)
819{
820 struct fc_rport *rport = transport_class_to_rport(cdev);
821
822 if (rport->fast_io_fail_tmo == -1)
823 return snprintf(buf, 5, "off\n");
824 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
825}
826
827static ssize_t
828store_fc_rport_fast_io_fail_tmo(struct class_device *cdev, const char *buf,
829 size_t count)
830{
831 int val;
832 char *cp;
833 struct fc_rport *rport = transport_class_to_rport(cdev);
834
835 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
836 (rport->port_state == FC_PORTSTATE_DELETED) ||
837 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
838 return -EBUSY;
839 if (strncmp(buf, "off", 3) == 0)
840 rport->fast_io_fail_tmo = -1;
841 else {
842 val = simple_strtoul(buf, &cp, 0);
843 if ((*cp && (*cp != '\n')) ||
844 (val < 0) || (val >= rport->dev_loss_tmo))
845 return -EINVAL;
846 rport->fast_io_fail_tmo = val;
847 }
848 return count;
849}
850static FC_CLASS_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
851 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1da177e4
LT		 852
853
854/*
855 * FC SCSI Target Attribute Management
856 */
857
858/*
859 * Note: in the target show function we recognize when the remote
1b3c3714 860 * port is in the hierarchy and do not allow the driver to get
1da177e4
LT		 861 * involved in sysfs functions. The driver only gets involved if
862 * it's the "old" style that doesn't use rports.
863 */
864#define fc_starget_show_function(field, format_string, sz, cast) \
865static ssize_t \
866show_fc_starget_##field (struct class_device *cdev, char *buf) \
867{ \
868 struct scsi_target *starget = transport_class_to_starget(cdev); \
869 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
870 struct fc_internal *i = to_fc_internal(shost->transportt); \
871 struct fc_rport *rport = starget_to_rport(starget); \
872 if (rport) \
873 fc_starget_##field(starget) = rport->field; \
874 else if (i->f->get_starget_##field) \
875 i->f->get_starget_##field(starget); \
876 return snprintf(buf, sz, format_string, \
877 cast fc_starget_##field(starget)); \
878}
879
880#define fc_starget_rd_attr(field, format_string, sz) \
881 fc_starget_show_function(field, format_string, sz, ) \
882static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
883 show_fc_starget_##field, NULL)
884
885#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
886 fc_starget_show_function(field, format_string, sz, (cast)) \
887static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
888 show_fc_starget_##field, NULL)
889
890#define SETUP_STARGET_ATTRIBUTE_RD(field) \
891 i->private_starget_attrs[count] = class_device_attr_starget_##field; \
892 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
893 i->private_starget_attrs[count].store = NULL; \
894 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
895 if (i->f->show_starget_##field) \
896 count++
897
898#define SETUP_STARGET_ATTRIBUTE_RW(field) \
899 i->private_starget_attrs[count] = class_device_attr_starget_##field; \
900 if (!i->f->set_starget_##field) { \
901 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
902 i->private_starget_attrs[count].store = NULL; \
903 } \
904 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
905 if (i->f->show_starget_##field) \
906 count++
907
908/* The FC Transport SCSI Target Attributes: */
909fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
910fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
911fc_starget_rd_attr(port_id, "0x%06x\n", 20);
912
913
914/*
915 * Host Attribute Management
916 */
917
918#define fc_host_show_function(field, format_string, sz, cast) \
919static ssize_t \
920show_fc_host_##field (struct class_device *cdev, char *buf) \
921{ \
922 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
923 struct fc_internal *i = to_fc_internal(shost->transportt); \
924 if (i->f->get_host_##field) \
925 i->f->get_host_##field(shost); \
926 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
927}
928
929#define fc_host_store_function(field) \
930static ssize_t \
931store_fc_host_##field(struct class_device *cdev, const char *buf, \
932 size_t count) \
933{ \
934 int val; \
935 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
936 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 937 char *cp; \
1da177e4 938 \
0f29b966
JS		 939 val = simple_strtoul(buf, &cp, 0); \
940 if (*cp && (*cp != '\n')) \
941 return -EINVAL; \
1da177e4
LT		 942 i->f->set_host_##field(shost, val); \
943 return count; \
944}
945
b8d08210
JS		 946#define fc_host_store_str_function(field, slen) \
947static ssize_t \
948store_fc_host_##field(struct class_device *cdev, const char *buf, \
949 size_t count) \
950{ \
951 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
952 struct fc_internal *i = to_fc_internal(shost->transportt); \
953 unsigned int cnt=count; \
954 \
955 /* count may include a LF at end of string */ \
956 if (buf[cnt-1] == '\n') \
957 cnt--; \
958 if (cnt > ((slen) - 1)) \
959 return -EINVAL; \
960 memcpy(fc_host_##field(shost), buf, cnt); \
961 i->f->set_host_##field(shost); \
962 return count; \
963}
964
1da177e4
LT		 965#define fc_host_rd_attr(field, format_string, sz) \
966 fc_host_show_function(field, format_string, sz, ) \
967static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
968 show_fc_host_##field, NULL)
969
970#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
971 fc_host_show_function(field, format_string, sz, (cast)) \
972static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
973 show_fc_host_##field, NULL)
974
975#define fc_host_rw_attr(field, format_string, sz) \
976 fc_host_show_function(field, format_string, sz, ) \
977 fc_host_store_function(field) \
978static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
979 show_fc_host_##field, \
980 store_fc_host_##field)
981
982#define fc_host_rd_enum_attr(title, maxlen) \
983static ssize_t \
984show_fc_host_##title (struct class_device *cdev, char *buf) \
985{ \
986 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
987 struct fc_internal *i = to_fc_internal(shost->transportt); \
988 const char *name; \
989 if (i->f->get_host_##title) \
990 i->f->get_host_##title(shost); \
991 name = get_fc_##title##_name(fc_host_##title(shost)); \
992 if (!name) \
993 return -EINVAL; \
994 return snprintf(buf, maxlen, "%s\n", name); \
995} \
996static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
997
998#define SETUP_HOST_ATTRIBUTE_RD(field) \
999 i->private_host_attrs[count] = class_device_attr_host_##field; \
1000 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1001 i->private_host_attrs[count].store = NULL; \
1002 i->host_attrs[count] = &i->private_host_attrs[count]; \
1003 if (i->f->show_host_##field) \
1004 count++
1005
1006#define SETUP_HOST_ATTRIBUTE_RW(field) \
1007 i->private_host_attrs[count] = class_device_attr_host_##field; \
1008 if (!i->f->set_host_##field) { \
1009 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1010 i->private_host_attrs[count].store = NULL; \
1011 } \
1012 i->host_attrs[count] = &i->private_host_attrs[count]; \
1013 if (i->f->show_host_##field) \
1014 count++
1015
1016
1017#define fc_private_host_show_function(field, format_string, sz, cast) \
1018static ssize_t \
1019show_fc_host_##field (struct class_device *cdev, char *buf) \
1020{ \
1021 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
1022 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1023}
1024
1025#define fc_private_host_rd_attr(field, format_string, sz) \
1026 fc_private_host_show_function(field, format_string, sz, ) \
1027static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
1028 show_fc_host_##field, NULL)
1029
1030#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1031 fc_private_host_show_function(field, format_string, sz, (cast)) \
1032static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
1033 show_fc_host_##field, NULL)
1034
1035#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1036 i->private_host_attrs[count] = class_device_attr_host_##field; \
1037 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1038 i->private_host_attrs[count].store = NULL; \
1039 i->host_attrs[count] = &i->private_host_attrs[count]; \
1040 count++
1041
1042#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
91ca7b01 1043{ \
1da177e4
LT		 1044 i->private_host_attrs[count] = class_device_attr_host_##field; \
1045 i->host_attrs[count] = &i->private_host_attrs[count]; \
91ca7b01
AV		 1046 count++; \
1047}
1da177e4
LT		 1048
1049
1050/* Fixed Host Attributes */
1051
1052static ssize_t
1053show_fc_host_supported_classes (struct class_device *cdev, char *buf)
1054{
1055 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1056
1057 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1058 return snprintf(buf, 20, "unspecified\n");
1059
1060 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1061}
1062static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1063 show_fc_host_supported_classes, NULL);
1064
1065static ssize_t
1066show_fc_host_supported_fc4s (struct class_device *cdev, char *buf)
1067{
1068 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1069 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1070}
1071static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1072 show_fc_host_supported_fc4s, NULL);
1073
1074static ssize_t
1075show_fc_host_supported_speeds (struct class_device *cdev, char *buf)
1076{
1077 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1078
1079 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1080 return snprintf(buf, 20, "unknown\n");
1081
1082 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1083}
1084static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1085 show_fc_host_supported_speeds, NULL);
1086
1087
1088fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1089fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
6b7281d0
AH		 1090fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1091 unsigned long long);
1da177e4
LT		 1092fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1093fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1094
1095
1096/* Dynamic Host Attributes */
1097
1098static ssize_t
1099show_fc_host_active_fc4s (struct class_device *cdev, char *buf)
1100{
1101 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1102 struct fc_internal *i = to_fc_internal(shost->transportt);
1103
1104 if (i->f->get_host_active_fc4s)
1105 i->f->get_host_active_fc4s(shost);
1106
1107 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1108}
1109static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1110 show_fc_host_active_fc4s, NULL);
1111
1112static ssize_t
1113show_fc_host_speed (struct class_device *cdev, char *buf)
1114{
1115 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1116 struct fc_internal *i = to_fc_internal(shost->transportt);
1117
1118 if (i->f->get_host_speed)
1119 i->f->get_host_speed(shost);
1120
1121 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1122 return snprintf(buf, 20, "unknown\n");
1123
1124 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1125}
1126static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO,
1127 show_fc_host_speed, NULL);
1128
1129
1130fc_host_rd_attr(port_id, "0x%06x\n", 20);
1131fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1132fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1133fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
016131b8 1134fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1da177e4 1135
b8d08210
JS		 1136fc_private_host_show_function(system_hostname, "%s\n",
1137 FC_SYMBOLIC_NAME_SIZE + 1, )
1138fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1139static FC_CLASS_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1140 show_fc_host_system_hostname, store_fc_host_system_hostname);
1141
1da177e4
LT		 1142
1143/* Private Host Attributes */
1144
1145static ssize_t
1146show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf)
1147{
1148 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1149 const char *name;
1150
1151 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1152 if (!name)
1153 return -EINVAL;
1154 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1155}
1156
d16794f6
JSEC		 1157#define get_list_head_entry(pos, head, member) \
1158 pos = list_entry((head)->next, typeof(*pos), member)
1159
1da177e4
LT		 1160static ssize_t
1161store_fc_private_host_tgtid_bind_type(struct class_device *cdev,
1162 const char *buf, size_t count)
1163{
1164 struct Scsi_Host *shost = transport_class_to_shost(cdev);
d16794f6 1165 struct fc_rport *rport;
1da177e4
LT		 1166 enum fc_tgtid_binding_type val;
1167 unsigned long flags;
1168
1169 if (get_fc_tgtid_bind_type_match(buf, &val))
1170 return -EINVAL;
1171
1172 /* if changing bind type, purge all unused consistent bindings */
1173 if (val != fc_host_tgtid_bind_type(shost)) {
1174 spin_lock_irqsave(shost->host_lock, flags);
d16794f6
JSEC		 1175 while (!list_empty(&fc_host_rport_bindings(shost))) {
1176 get_list_head_entry(rport,
1177 &fc_host_rport_bindings(shost), peers);
aedf3497
JS		 1178 list_del(&rport->peers);
1179 rport->port_state = FC_PORTSTATE_DELETED;
1180 fc_queue_work(shost, &rport->rport_delete_work);
d16794f6 1181 }
1da177e4
LT		 1182 spin_unlock_irqrestore(shost->host_lock, flags);
1183 }
1184
1185 fc_host_tgtid_bind_type(shost) = val;
1186 return count;
1187}
1188
1189static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1190 show_fc_private_host_tgtid_bind_type,
1191 store_fc_private_host_tgtid_bind_type);
1192
91ca7b01
AV		 1193static ssize_t
1194store_fc_private_host_issue_lip(struct class_device *cdev,
1195 const char *buf, size_t count)
1196{
1197 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1198 struct fc_internal *i = to_fc_internal(shost->transportt);
1199 int ret;
1200
1201 /* ignore any data value written to the attribute */
1202 if (i->f->issue_fc_host_lip) {
1203 ret = i->f->issue_fc_host_lip(shost);
1204 return ret ? ret: count;
1205 }
1206
1207 return -ENOENT;
1208}
1209
1210static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1211 store_fc_private_host_issue_lip);
1212
1da177e4
LT		 1213/*
1214 * Host Statistics Management
1215 */
1216
1217/* Show a given an attribute in the statistics group */
1218static ssize_t
1219fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset)
1220{
1221 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1222 struct fc_internal *i = to_fc_internal(shost->transportt);
1223 struct fc_host_statistics *stats;
1224 ssize_t ret = -ENOENT;
1225
1226 if (offset > sizeof(struct fc_host_statistics) ||
1227 offset % sizeof(u64) != 0)
1228 WARN_ON(1);
1229
1230 if (i->f->get_fc_host_stats) {
1231 stats = (i->f->get_fc_host_stats)(shost);
1232 if (stats)
1233 ret = snprintf(buf, 20, "0x%llx\n",
1234 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1235 }
1236 return ret;
1237}
1238
1239
1240/* generate a read-only statistics attribute */
1241#define fc_host_statistic(name) \
1242static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \
1243{ \
1244 return fc_stat_show(cd, buf, \
1245 offsetof(struct fc_host_statistics, name)); \
1246} \
1247static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1248
1249fc_host_statistic(seconds_since_last_reset);
1250fc_host_statistic(tx_frames);
1251fc_host_statistic(tx_words);
1252fc_host_statistic(rx_frames);
1253fc_host_statistic(rx_words);
1254fc_host_statistic(lip_count);
1255fc_host_statistic(nos_count);
1256fc_host_statistic(error_frames);
1257fc_host_statistic(dumped_frames);
1258fc_host_statistic(link_failure_count);
1259fc_host_statistic(loss_of_sync_count);
1260fc_host_statistic(loss_of_signal_count);
1261fc_host_statistic(prim_seq_protocol_err_count);
1262fc_host_statistic(invalid_tx_word_count);
1263fc_host_statistic(invalid_crc_count);
1264fc_host_statistic(fcp_input_requests);
1265fc_host_statistic(fcp_output_requests);
1266fc_host_statistic(fcp_control_requests);
1267fc_host_statistic(fcp_input_megabytes);
1268fc_host_statistic(fcp_output_megabytes);
1269
1270static ssize_t
1271fc_reset_statistics(struct class_device *cdev, const char *buf,
1272 size_t count)
1273{
1274 struct Scsi_Host *shost = transport_class_to_shost(cdev);
1275 struct fc_internal *i = to_fc_internal(shost->transportt);
1276
1277 /* ignore any data value written to the attribute */
1278 if (i->f->reset_fc_host_stats) {
1279 i->f->reset_fc_host_stats(shost);
1280 return count;
1281 }
1282
1283 return -ENOENT;
1284}
1285static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1286 fc_reset_statistics);
1287
1288
1289static struct attribute *fc_statistics_attrs[] = {
1290 &class_device_attr_host_seconds_since_last_reset.attr,
1291 &class_device_attr_host_tx_frames.attr,
1292 &class_device_attr_host_tx_words.attr,
1293 &class_device_attr_host_rx_frames.attr,
1294 &class_device_attr_host_rx_words.attr,
1295 &class_device_attr_host_lip_count.attr,
1296 &class_device_attr_host_nos_count.attr,
1297 &class_device_attr_host_error_frames.attr,
1298 &class_device_attr_host_dumped_frames.attr,
1299 &class_device_attr_host_link_failure_count.attr,
1300 &class_device_attr_host_loss_of_sync_count.attr,
1301 &class_device_attr_host_loss_of_signal_count.attr,
1302 &class_device_attr_host_prim_seq_protocol_err_count.attr,
1303 &class_device_attr_host_invalid_tx_word_count.attr,
1304 &class_device_attr_host_invalid_crc_count.attr,
1305 &class_device_attr_host_fcp_input_requests.attr,
1306 &class_device_attr_host_fcp_output_requests.attr,
1307 &class_device_attr_host_fcp_control_requests.attr,
1308 &class_device_attr_host_fcp_input_megabytes.attr,
1309 &class_device_attr_host_fcp_output_megabytes.attr,
1310 &class_device_attr_host_reset_statistics.attr,
1311 NULL
1312};
1313
1314static struct attribute_group fc_statistics_group = {
1315 .name = "statistics",
1316 .attrs = fc_statistics_attrs,
1317};
1318
1319static int fc_host_match(struct attribute_container *cont,
1320 struct device *dev)
1321{
1322 struct Scsi_Host *shost;
1323 struct fc_internal *i;
1324
1325 if (!scsi_is_host_device(dev))
1326 return 0;
1327
1328 shost = dev_to_shost(dev);
1329 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1330 != &fc_host_class.class)
1331 return 0;
1332
1333 i = to_fc_internal(shost->transportt);
1334
1335 return &i->t.host_attrs.ac == cont;
1336}
1337
1338static int fc_target_match(struct attribute_container *cont,
1339 struct device *dev)
1340{
1341 struct Scsi_Host *shost;
1342 struct fc_internal *i;
1343
1344 if (!scsi_is_target_device(dev))
1345 return 0;
1346
1347 shost = dev_to_shost(dev->parent);
1348 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1349 != &fc_host_class.class)
1350 return 0;
1351
1352 i = to_fc_internal(shost->transportt);
1353
1354 return &i->t.target_attrs.ac == cont;
1355}
1356
1357static void fc_rport_dev_release(struct device *dev)
1358{
1359 struct fc_rport *rport = dev_to_rport(dev);
1360 put_device(dev->parent);
1361 kfree(rport);
1362}
1363
1364int scsi_is_fc_rport(const struct device *dev)
1365{
1366 return dev->release == fc_rport_dev_release;
1367}
1368EXPORT_SYMBOL(scsi_is_fc_rport);
1369
1370static int fc_rport_match(struct attribute_container *cont,
1371 struct device *dev)
1372{
1373 struct Scsi_Host *shost;
1374 struct fc_internal *i;
1375
1376 if (!scsi_is_fc_rport(dev))
1377 return 0;
1378
1379 shost = dev_to_shost(dev->parent);
1380 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1381 != &fc_host_class.class)
1382 return 0;
1383
1384 i = to_fc_internal(shost->transportt);
1385
1386 return &i->rport_attr_cont.ac == cont;
1387}
1388
5c44cd2a 1389
c829c394
JS		 1390/**
1391 * fc_timed_out - FC Transport I/O timeout intercept handler
1392 *
1393 * @scmd: The SCSI command which timed out
1394 *
1395 * This routine protects against error handlers getting invoked while a
1396 * rport is in a blocked state, typically due to a temporarily loss of
1397 * connectivity. If the error handlers are allowed to proceed, requests
1398 * to abort i/o, reset the target, etc will likely fail as there is no way
1399 * to communicate with the device to perform the requested function. These
1400 * failures may result in the midlayer taking the device offline, requiring
1401 * manual intervention to restore operation.
1402 *
1403 * This routine, called whenever an i/o times out, validates the state of
1404 * the underlying rport. If the rport is blocked, it returns
1405 * EH_RESET_TIMER, which will continue to reschedule the timeout.
1406 * Eventually, either the device will return, or devloss_tmo will fire,
1407 * and when the timeout then fires, it will be handled normally.
1408 * If the rport is not blocked, normal error handling continues.
1409 *
1410 * Notes:
1411 * This routine assumes no locks are held on entry.
1412 **/
1413static enum scsi_eh_timer_return
1414fc_timed_out(struct scsi_cmnd *scmd)
1415{
1416 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
1417
1418 if (rport->port_state == FC_PORTSTATE_BLOCKED)
1419 return EH_RESET_TIMER;
1420
1421 return EH_NOT_HANDLED;
1422}
1423
5c44cd2a
JSEC		 1424/*
1425 * Must be called with shost->host_lock held
1426 */
e02f3f59
CH		 1427static int fc_user_scan(struct Scsi_Host *shost, uint channel,
1428 uint id, uint lun)
5c44cd2a
JSEC		 1429{
1430 struct fc_rport *rport;
1431
e02f3f59
CH		 1432 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1433 if (rport->scsi_target_id == -1)
1434 continue;
5c44cd2a 1435
e02f3f59
CH		 1436 if ((channel == SCAN_WILD_CARD || channel == rport->channel) &&
1437 (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) {
1438 scsi_scan_target(&rport->dev, rport->channel,
1439 rport->scsi_target_id, lun, 1);
1440 }
1441 }
1442
1443 return 0;
5c44cd2a
JSEC		 1444}
1445
1da177e4
LT		 1446struct scsi_transport_template *
1447fc_attach_transport(struct fc_function_template *ft)
1448{
1da177e4 1449 int count;
24669f75
JS		 1450 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
1451 GFP_KERNEL);
1da177e4
LT		 1452
1453 if (unlikely(!i))
1454 return NULL;
1455
1da177e4
LT		 1456 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
1457 i->t.target_attrs.ac.class = &fc_transport_class.class;
1458 i->t.target_attrs.ac.match = fc_target_match;
1459 i->t.target_size = sizeof(struct fc_starget_attrs);
1460 transport_container_register(&i->t.target_attrs);
1461
1462 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1463 i->t.host_attrs.ac.class = &fc_host_class.class;
1464 i->t.host_attrs.ac.match = fc_host_match;
1465 i->t.host_size = sizeof(struct fc_host_attrs);
1466 if (ft->get_fc_host_stats)
1467 i->t.host_attrs.statistics = &fc_statistics_group;
1468 transport_container_register(&i->t.host_attrs);
1469
1470 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
1471 i->rport_attr_cont.ac.class = &fc_rport_class.class;
1472 i->rport_attr_cont.ac.match = fc_rport_match;
1473 transport_container_register(&i->rport_attr_cont);
1474
1475 i->f = ft;
1476
1477 /* Transport uses the shost workq for scsi scanning */
1478 i->t.create_work_queue = 1;
5c44cd2a 1479
c829c394
JS		 1480 i->t.eh_timed_out = fc_timed_out;
1481
e02f3f59 1482 i->t.user_scan = fc_user_scan;
1da177e4
LT		 1483
1484 /*
1485 * Setup SCSI Target Attributes.
1486 */
1487 count = 0;
1488 SETUP_STARGET_ATTRIBUTE_RD(node_name);
1489 SETUP_STARGET_ATTRIBUTE_RD(port_name);
1490 SETUP_STARGET_ATTRIBUTE_RD(port_id);
1491
1492 BUG_ON(count > FC_STARGET_NUM_ATTRS);
1493
1494 i->starget_attrs[count] = NULL;
1495
1496
1497 /*
1498 * Setup SCSI Host Attributes.
1499 */
1500 count=0;
1501 SETUP_HOST_ATTRIBUTE_RD(node_name);
1502 SETUP_HOST_ATTRIBUTE_RD(port_name);
6b7281d0 1503 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1da177e4
LT		 1504 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
1505 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1da177e4
LT		 1506 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
1507 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
1508 SETUP_HOST_ATTRIBUTE_RD(serial_number);
1509
1510 SETUP_HOST_ATTRIBUTE_RD(port_id);
1511 SETUP_HOST_ATTRIBUTE_RD(port_type);
1512 SETUP_HOST_ATTRIBUTE_RD(port_state);
1513 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
1514 SETUP_HOST_ATTRIBUTE_RD(speed);
1515 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
016131b8 1516 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
b8d08210 1517 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
1da177e4
LT		 1518
1519 /* Transport-managed attributes */
1520 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
91ca7b01
AV		 1521 if (ft->issue_fc_host_lip)
1522 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
1da177e4
LT		 1523
1524 BUG_ON(count > FC_HOST_NUM_ATTRS);
1525
1526 i->host_attrs[count] = NULL;
1527
1528 /*
1529 * Setup Remote Port Attributes.
1530 */
1531 count=0;
1532 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
1533 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
1534 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
1535 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
1536 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
1537 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
1538 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
1539 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
1540 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
0f29b966
JS		 1541 if (ft->terminate_rport_io)
1542 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
1da177e4
LT		 1543
1544 BUG_ON(count > FC_RPORT_NUM_ATTRS);
1545
1546 i->rport_attrs[count] = NULL;
1547
1548 return &i->t;
1549}
1550EXPORT_SYMBOL(fc_attach_transport);
1551
1552void fc_release_transport(struct scsi_transport_template *t)
1553{
1554 struct fc_internal *i = to_fc_internal(t);
1555
1556 transport_container_unregister(&i->t.target_attrs);
1557 transport_container_unregister(&i->t.host_attrs);
1558 transport_container_unregister(&i->rport_attr_cont);
1559
1560 kfree(i);
1561}
1562EXPORT_SYMBOL(fc_release_transport);
1563
aedf3497
JS		 1564/**
1565 * fc_queue_work - Queue work to the fc_host workqueue.
1566 * @shost: Pointer to Scsi_Host bound to fc_host.
1567 * @work: Work to queue for execution.
1568 *
1569 * Return value:
a0785edf
JS		 1570 * 1 - work queued for execution
1571 * 0 - work is already queued
1572 * -EINVAL - work queue doesn't exist
aedf3497
JS		 1573 **/
1574static int
1575fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
1576{
1577 if (unlikely(!fc_host_work_q(shost))) {
1578 printk(KERN_ERR
1579 "ERROR: FC host '%s' attempted to queue work, "
1580 "when no workqueue created.\n", shost->hostt->name);
1581 dump_stack();
1582
1583 return -EINVAL;
1584 }
1585
1586 return queue_work(fc_host_work_q(shost), work);
1587}
1588
1589/**
1590 * fc_flush_work - Flush a fc_host's workqueue.
1591 * @shost: Pointer to Scsi_Host bound to fc_host.
1592 **/
1593static void
1594fc_flush_work(struct Scsi_Host *shost)
1595{
1596 if (!fc_host_work_q(shost)) {
1597 printk(KERN_ERR
1598 "ERROR: FC host '%s' attempted to flush work, "
1599 "when no workqueue created.\n", shost->hostt->name);
1600 dump_stack();
1601 return;
1602 }
1603
1604 flush_workqueue(fc_host_work_q(shost));
1605}
1606
1607/**
1608 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
1609 * @shost: Pointer to Scsi_Host bound to fc_host.
1610 * @work: Work to queue for execution.
1611 * @delay: jiffies to delay the work queuing
1612 *
1613 * Return value:
0f29b966 1614 * 1 on success / 0 already queued / < 0 for error
aedf3497
JS		 1615 **/
1616static int
c4028958 1617fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
aedf3497
JS		 1618 unsigned long delay)
1619{
1620 if (unlikely(!fc_host_devloss_work_q(shost))) {
1621 printk(KERN_ERR
1622 "ERROR: FC host '%s' attempted to queue work, "
1623 "when no workqueue created.\n", shost->hostt->name);
1624 dump_stack();
1625
1626 return -EINVAL;
1627 }
1628
1629 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
1630}
1631
1632/**
1633 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
1634 * @shost: Pointer to Scsi_Host bound to fc_host.
1635 **/
1636static void
1637fc_flush_devloss(struct Scsi_Host *shost)
1638{
1639 if (!fc_host_devloss_work_q(shost)) {
1640 printk(KERN_ERR
1641 "ERROR: FC host '%s' attempted to flush work, "
1642 "when no workqueue created.\n", shost->hostt->name);
1643 dump_stack();
1644 return;
1645 }
1646
1647 flush_workqueue(fc_host_devloss_work_q(shost));
1648}
1649
1da177e4
LT		 1650
1651/**
1652 * fc_remove_host - called to terminate any fc_transport-related elements
1653 * for a scsi host.
1654 * @rport: remote port to be unblocked.
1655 *
1656 * This routine is expected to be called immediately preceeding the
1657 * a driver's call to scsi_remove_host().
1658 *
1659 * WARNING: A driver utilizing the fc_transport, which fails to call
1660 * this routine prior to scsi_remote_host(), will leave dangling
1661 * objects in /sys/class/fc_remote_ports. Access to any of these
1662 * objects can result in a system crash !!!
1663 *
1664 * Notes:
1665 * This routine assumes no locks are held on entry.
1666 **/
1667void
1668fc_remove_host(struct Scsi_Host *shost)
1669{
1670 struct fc_rport *rport, *next_rport;
aedf3497
JS		 1671 struct workqueue_struct *work_q;
1672 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 1673
1674 /* Remove any remote ports */
1675 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 1676 &fc_host->rports, peers) {
1677 list_del(&rport->peers);
1678 rport->port_state = FC_PORTSTATE_DELETED;
1679 fc_queue_work(shost, &rport->rport_delete_work);
1680 }
1681
1da177e4 1682 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 1683 &fc_host->rport_bindings, peers) {
1684 list_del(&rport->peers);
1685 rport->port_state = FC_PORTSTATE_DELETED;
1686 fc_queue_work(shost, &rport->rport_delete_work);
1687 }
1688
1689 /* flush all scan work items */
1690 scsi_flush_work(shost);
1691
1692 /* flush all stgt delete, and rport delete work items, then kill it */
1693 if (fc_host->work_q) {
1694 work_q = fc_host->work_q;
1695 fc_host->work_q = NULL;
1696 destroy_workqueue(work_q);
1697 }
1698
1699 /* flush all devloss work items, then kill it */
1700 if (fc_host->devloss_work_q) {
1701 work_q = fc_host->devloss_work_q;
1702 fc_host->devloss_work_q = NULL;
1703 destroy_workqueue(work_q);
1704 }
1da177e4
LT		 1705}
1706EXPORT_SYMBOL(fc_remove_host);
1707
aedf3497
JS		 1708
1709/**
1710 * fc_starget_delete - called to delete the scsi decendents of an rport
1711 * (target and all sdevs)
1712 *
c4028958 1713 * @work: remote port to be operated on.
aedf3497 1714 **/
19a7b4ae 1715static void
c4028958 1716fc_starget_delete(struct work_struct *work)
19a7b4ae 1717{
c4028958
DH		 1718 struct fc_rport *rport =
1719 container_of(work, struct fc_rport, stgt_delete_work);
19a7b4ae 1720 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966
JS		 1721 struct fc_internal *i = to_fc_internal(shost->transportt);
1722
92740b24
JS		 1723 /* Involve the LLDD if possible to terminate all io on the rport. */
1724 if (i->f->terminate_rport_io)
0f29b966 1725 i->f->terminate_rport_io(rport);
19a7b4ae 1726
19a7b4ae
JSEC		 1727 scsi_remove_target(&rport->dev);
1728}
1729
aedf3497
JS		 1730
1731/**
1732 * fc_rport_final_delete - finish rport termination and delete it.
1733 *
c4028958 1734 * @work: remote port to be deleted.
aedf3497
JS		 1735 **/
1736static void
c4028958 1737fc_rport_final_delete(struct work_struct *work)
aedf3497 1738{
c4028958
DH		 1739 struct fc_rport *rport =
1740 container_of(work, struct fc_rport, rport_delete_work);
aedf3497
JS		 1741 struct device *dev = &rport->dev;
1742 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 1743 struct fc_internal *i = to_fc_internal(shost->transportt);
92740b24 1744 unsigned long flags;
aedf3497
JS		 1745
1746 /*
1747 * if a scan is pending, flush the SCSI Host work_q so that
1748 * that we can reclaim the rport scan work element.
1749 */
1750 if (rport->flags & FC_RPORT_SCAN_PENDING)
1751 scsi_flush_work(shost);
1752
92740b24
JS		 1753 /* involve the LLDD to terminate all pending i/o */
1754 if (i->f->terminate_rport_io)
1755 i->f->terminate_rport_io(rport);
1756
1757 /*
1758 * Cancel any outstanding timers. These should really exist
1759 * only when rmmod'ing the LLDD and we're asking for
1760 * immediate termination of the rports
1761 */
1762 spin_lock_irqsave(shost->host_lock, flags);
1763 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
1764 spin_unlock_irqrestore(shost->host_lock, flags);
1765 if (!cancel_delayed_work(&rport->fail_io_work))
1766 fc_flush_devloss(shost);
1767 if (!cancel_delayed_work(&rport->dev_loss_work))
1768 fc_flush_devloss(shost);
1769 spin_lock_irqsave(shost->host_lock, flags);
1770 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
1771 }
1772 spin_unlock_irqrestore(shost->host_lock, flags);
1773
0f29b966
JS		 1774 /* Delete SCSI target and sdevs */
1775 if (rport->scsi_target_id != -1)
c4028958 1776 fc_starget_delete(&rport->stgt_delete_work);
92740b24
JS		 1777
1778 /*
1779 * Notify the driver that the rport is now dead. The LLDD will
1780 * also guarantee that any communication to the rport is terminated
1781 */
1782 if (i->f->dev_loss_tmo_callbk)
0f29b966 1783 i->f->dev_loss_tmo_callbk(rport);
0f29b966 1784
aedf3497
JS		 1785 transport_remove_device(dev);
1786 device_del(dev);
1787 transport_destroy_device(dev);
3bdad7bd
JS		 1788 put_device(&shost->shost_gendev); /* for fc_host->rport list */
1789 put_device(dev); /* for self-reference */
aedf3497
JS		 1790}
1791
1792
1da177e4
LT		 1793/**
1794 * fc_rport_create - allocates and creates a remote FC port.
1795 * @shost: scsi host the remote port is connected to.
1796 * @channel: Channel on shost port connected to.
1797 * @ids: The world wide names, fc address, and FC4 port
1798 * roles for the remote port.
1799 *
1800 * Allocates and creates the remoter port structure, including the
1801 * class and sysfs creation.
1802 *
1803 * Notes:
1804 * This routine assumes no locks are held on entry.
1805 **/
1806struct fc_rport *
1807fc_rport_create(struct Scsi_Host *shost, int channel,
1808 struct fc_rport_identifiers *ids)
1809{
aedf3497 1810 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 1811 struct fc_internal *fci = to_fc_internal(shost->transportt);
1812 struct fc_rport *rport;
1813 struct device *dev;
1814 unsigned long flags;
1815 int error;
1816 size_t size;
1817
1818 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
24669f75 1819 rport = kzalloc(size, GFP_KERNEL);
1da177e4
LT		 1820 if (unlikely(!rport)) {
1821 printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
1822 return NULL;
1823 }
1da177e4
LT		 1824
1825 rport->maxframe_size = -1;
1826 rport->supported_classes = FC_COS_UNSPECIFIED;
1827 rport->dev_loss_tmo = fc_dev_loss_tmo;
1828 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
1829 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
1830 rport->port_id = ids->port_id;
1831 rport->roles = ids->roles;
1832 rport->port_state = FC_PORTSTATE_ONLINE;
1833 if (fci->f->dd_fcrport_size)
1834 rport->dd_data = &rport[1];
1835 rport->channel = channel;
0f29b966 1836 rport->fast_io_fail_tmo = -1;
1da177e4 1837
c4028958
DH		 1838 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
1839 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
1840 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
1841 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
1842 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
1da177e4
LT		 1843
1844 spin_lock_irqsave(shost->host_lock, flags);
1845
1846 rport->number = fc_host->next_rport_number++;
1847 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1848 rport->scsi_target_id = fc_host->next_target_id++;
1849 else
1850 rport->scsi_target_id = -1;
aedf3497 1851 list_add_tail(&rport->peers, &fc_host->rports);
3bdad7bd 1852 get_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 1853
1854 spin_unlock_irqrestore(shost->host_lock, flags);
1855
1856 dev = &rport->dev;
3bdad7bd
JS		 1857 device_initialize(dev); /* takes self reference */
1858 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
1da177e4
LT		 1859 dev->release = fc_rport_dev_release;
1860 sprintf(dev->bus_id, "rport-%d:%d-%d",
1861 shost->host_no, channel, rport->number);
1862 transport_setup_device(dev);
1863
1864 error = device_add(dev);
1865 if (error) {
1866 printk(KERN_ERR "FC Remote Port device_add failed\n");
1867 goto delete_rport;
1868 }
1869 transport_add_device(dev);
1870 transport_configure_device(dev);
1871
aedf3497 1872 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
1da177e4 1873 /* initiate a scan of the target */
aedf3497 1874 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 1875 scsi_queue_work(shost, &rport->scan_work);
aedf3497 1876 }
1da177e4
LT		 1877
1878 return rport;
1879
1880delete_rport:
1881 transport_destroy_device(dev);
1da177e4
LT		 1882 spin_lock_irqsave(shost->host_lock, flags);
1883 list_del(&rport->peers);
3bdad7bd 1884 put_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 1885 spin_unlock_irqrestore(shost->host_lock, flags);
1886 put_device(dev->parent);
1887 kfree(rport);
1888 return NULL;
1889}
1890
1891/**
1892 * fc_remote_port_add - notifies the fc transport of the existence
1893 * of a remote FC port.
1894 * @shost: scsi host the remote port is connected to.
1895 * @channel: Channel on shost port connected to.
1896 * @ids: The world wide names, fc address, and FC4 port
1897 * roles for the remote port.
1898 *
1899 * The LLDD calls this routine to notify the transport of the existence
1900 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
1901 * of the port, it's FC address (port_id), and the FC4 roles that are
1902 * active for the port.
1903 *
1904 * For ports that are FCP targets (aka scsi targets), the FC transport
1905 * maintains consistent target id bindings on behalf of the LLDD.
1906 * A consistent target id binding is an assignment of a target id to
1907 * a remote port identifier, which persists while the scsi host is
1908 * attached. The remote port can disappear, then later reappear, and
1909 * it's target id assignment remains the same. This allows for shifts
1910 * in FC addressing (if binding by wwpn or wwnn) with no apparent
1911 * changes to the scsi subsystem which is based on scsi host number and
1912 * target id values. Bindings are only valid during the attachment of
1913 * the scsi host. If the host detaches, then later re-attaches, target
1914 * id bindings may change.
1915 *
1916 * This routine is responsible for returning a remote port structure.
1917 * The routine will search the list of remote ports it maintains
1918 * internally on behalf of consistent target id mappings. If found, the
1919 * remote port structure will be reused. Otherwise, a new remote port
1920 * structure will be allocated.
1921 *
1922 * Whenever a remote port is allocated, a new fc_remote_port class
1923 * device is created.
1924 *
1925 * Should not be called from interrupt context.
1926 *
1927 * Notes:
1928 * This routine assumes no locks are held on entry.
1929 **/
1930struct fc_rport *
1931fc_remote_port_add(struct Scsi_Host *shost, int channel,
1932 struct fc_rport_identifiers *ids)
1933{
19a7b4ae 1934 struct fc_internal *fci = to_fc_internal(shost->transportt);
aedf3497 1935 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 1936 struct fc_rport *rport;
1937 unsigned long flags;
1938 int match = 0;
1939
aedf3497
JS		 1940 /* ensure any stgt delete functions are done */
1941 fc_flush_work(shost);
1942
19a7b4ae
JSEC		 1943 /*
1944 * Search the list of "active" rports, for an rport that has been
1945 * deleted, but we've held off the real delete while the target
1946 * is in a "blocked" state.
1947 */
1948 spin_lock_irqsave(shost->host_lock, flags);
1949
aedf3497 1950 list_for_each_entry(rport, &fc_host->rports, peers) {
19a7b4ae
JSEC		 1951
1952 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
1953 (rport->channel == channel)) {
1954
aedf3497 1955 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 1956 case FC_TGTID_BIND_BY_WWPN:
1957 case FC_TGTID_BIND_NONE:
1958 if (rport->port_name == ids->port_name)
1959 match = 1;
1960 break;
1961 case FC_TGTID_BIND_BY_WWNN:
1962 if (rport->node_name == ids->node_name)
1963 match = 1;
1964 break;
1965 case FC_TGTID_BIND_BY_ID:
1966 if (rport->port_id == ids->port_id)
1967 match = 1;
1968 break;
1969 }
1970
1971 if (match) {
19a7b4ae
JSEC		 1972
1973 memcpy(&rport->node_name, &ids->node_name,
1974 sizeof(rport->node_name));
1975 memcpy(&rport->port_name, &ids->port_name,
1976 sizeof(rport->port_name));
1977 rport->port_id = ids->port_id;
1978
1979 rport->port_state = FC_PORTSTATE_ONLINE;
1980 rport->roles = ids->roles;
1981
1982 spin_unlock_irqrestore(shost->host_lock, flags);
1983
1984 if (fci->f->dd_fcrport_size)
1985 memset(rport->dd_data, 0,
1986 fci->f->dd_fcrport_size);
1987
1988 /*
92740b24
JS		 1989 * If we were not a target, cancel the
1990 * io terminate and rport timers, and
1991 * we're done.
1992 *
1993 * If we were a target, but our new role
1994 * doesn't indicate a target, leave the
1995 * timers running expecting the role to
1996 * change as the target fully logs in. If
1997 * it doesn't, the target will be torn down.
1998 *
1999 * If we were a target, and our role shows
2000 * we're still a target, cancel the timers
2001 * and kick off a scan.
19a7b4ae 2002 */
19a7b4ae 2003
92740b24
JS		 2004 /* was a target, not in roles */
2005 if ((rport->scsi_target_id != -1) &&
2006 (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET)))
2007 return rport;
19a7b4ae
JSEC		 2008
2009 /*
92740b24
JS		 2010 * Stop the fail io and dev_loss timers.
2011 * If they flush, the port_state will
2012 * be checked and will NOOP the function.
19a7b4ae 2013 */
0f29b966
JS		 2014 if (!cancel_delayed_work(&rport->fail_io_work))
2015 fc_flush_devloss(shost);
92740b24 2016 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2017 fc_flush_devloss(shost);
2018
2019 spin_lock_irqsave(shost->host_lock, flags);
2020
2021 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
19a7b4ae 2022
92740b24
JS		 2023 /* if target, initiate a scan */
2024 if (rport->scsi_target_id != -1) {
2025 rport->flags |= FC_RPORT_SCAN_PENDING;
2026 scsi_queue_work(shost,
2027 &rport->scan_work);
2028 spin_unlock_irqrestore(shost->host_lock,
2029 flags);
2030 scsi_target_unblock(&rport->dev);
2031 } else
2032 spin_unlock_irqrestore(shost->host_lock,
2033 flags);
a0785edf 2034
19a7b4ae
JSEC		 2035 return rport;
2036 }
2037 }
2038 }
2039
92740b24
JS		 2040 /*
2041 * Search the bindings array
2042 * Note: if never a FCP target, you won't be on this list
2043 */
aedf3497 2044 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
1da177e4
LT		 2045
2046 /* search for a matching consistent binding */
2047
aedf3497 2048 list_for_each_entry(rport, &fc_host->rport_bindings,
1da177e4
LT		 2049 peers) {
2050 if (rport->channel != channel)
2051 continue;
2052
aedf3497 2053 switch (fc_host->tgtid_bind_type) {
1da177e4
LT		 2054 case FC_TGTID_BIND_BY_WWPN:
2055 if (rport->port_name == ids->port_name)
2056 match = 1;
2057 break;
2058 case FC_TGTID_BIND_BY_WWNN:
2059 if (rport->node_name == ids->node_name)
2060 match = 1;
2061 break;
2062 case FC_TGTID_BIND_BY_ID:
2063 if (rport->port_id == ids->port_id)
2064 match = 1;
2065 break;
2066 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2067 break;
2068 }
2069
2070 if (match) {
aedf3497 2071 list_move_tail(&rport->peers, &fc_host->rports);
1da177e4
LT		 2072 break;
2073 }
2074 }
2075
1da177e4
LT		 2076 if (match) {
2077 memcpy(&rport->node_name, &ids->node_name,
2078 sizeof(rport->node_name));
2079 memcpy(&rport->port_name, &ids->port_name,
2080 sizeof(rport->port_name));
2081 rport->port_id = ids->port_id;
2082 rport->roles = ids->roles;
2083 rport->port_state = FC_PORTSTATE_ONLINE;
2084
19a7b4ae
JSEC		 2085 if (fci->f->dd_fcrport_size)
2086 memset(rport->dd_data, 0,
2087 fci->f->dd_fcrport_size);
2088
aedf3497 2089 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) {
1da177e4 2090 /* initiate a scan of the target */
aedf3497 2091 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2092 scsi_queue_work(shost, &rport->scan_work);
a0785edf
JS		 2093 spin_unlock_irqrestore(shost->host_lock, flags);
2094 scsi_target_unblock(&rport->dev);
2095 } else
2096 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2097
2098 return rport;
2099 }
2100 }
2101
19a7b4ae
JSEC		 2102 spin_unlock_irqrestore(shost->host_lock, flags);
2103
1da177e4
LT		 2104 /* No consistent binding found - create new remote port entry */
2105 rport = fc_rport_create(shost, channel, ids);
2106
2107 return rport;
2108}
2109EXPORT_SYMBOL(fc_remote_port_add);
2110
1da177e4
LT		 2111
2112/**
2113 * fc_remote_port_delete - notifies the fc transport that a remote
2114 * port is no longer in existence.
2115 * @rport: The remote port that no longer exists
2116 *
2117 * The LLDD calls this routine to notify the transport that a remote
2118 * port is no longer part of the topology. Note: Although a port
2119 * may no longer be part of the topology, it may persist in the remote
19a7b4ae
JSEC		 2120 * ports displayed by the fc_host. We do this under 2 conditions:
2121 * - If the port was a scsi target, we delay its deletion by "blocking" it.
2122 * This allows the port to temporarily disappear, then reappear without
2123 * disrupting the SCSI device tree attached to it. During the "blocked"
2124 * period the port will still exist.
2125 * - If the port was a scsi target and disappears for longer than we
2126 * expect, we'll delete the port and the tear down the SCSI device tree
2127 * attached to it. However, we want to semi-persist the target id assigned
2128 * to that port if it eventually does exist. The port structure will
2129 * remain (although with minimal information) so that the target id
2130 * bindings remails.
1da177e4
LT		 2131 *
2132 * If the remote port is not an FCP Target, it will be fully torn down
2133 * and deallocated, including the fc_remote_port class device.
2134 *
19a7b4ae
JSEC		 2135 * If the remote port is an FCP Target, the port will be placed in a
2136 * temporary blocked state. From the LLDD's perspective, the rport no
2137 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2138 * exists, but all sdevs on it are blocked from further I/O. The following
2139 * is then expected:
2140 * If the remote port does not return (signaled by a LLDD call to
2141 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2142 * scsi target is removed - killing all outstanding i/o and removing the
2143 * scsi devices attached ot it. The port structure will be marked Not
2144 * Present and be partially cleared, leaving only enough information to
2145 * recognize the remote port relative to the scsi target id binding if
2146 * it later appears. The port will remain as long as there is a valid
2147 * binding (e.g. until the user changes the binding type or unloads the
2148 * scsi host with the binding).
1da177e4 2149 *
19a7b4ae
JSEC		 2150 * If the remote port returns within the dev_loss_tmo value (and matches
2151 * according to the target id binding type), the port structure will be
2152 * reused. If it is no longer a SCSI target, the target will be torn
2153 * down. If it continues to be a SCSI target, then the target will be
2154 * unblocked (allowing i/o to be resumed), and a scan will be activated
2155 * to ensure that all luns are detected.
2156 *
2157 * Called from normal process context only - cannot be called from interrupt.
1da177e4
LT		 2158 *
2159 * Notes:
2160 * This routine assumes no locks are held on entry.
2161 **/
2162void
2163fc_remote_port_delete(struct fc_rport *rport)
2164{
aedf3497 2165 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2166 struct fc_internal *i = to_fc_internal(shost->transportt);
19a7b4ae 2167 int timeout = rport->dev_loss_tmo;
aedf3497
JS		 2168 unsigned long flags;
2169
2170 /*
2171 * No need to flush the fc_host work_q's, as all adds are synchronous.
2172 *
2173 * We do need to reclaim the rport scan work element, so eventually
2174 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2175 * there's still a scan pending.
2176 */
2177
2178 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2179
92740b24 2180 if (rport->port_state != FC_PORTSTATE_ONLINE) {
aedf3497 2181 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2182 return;
2183 }
2184
92740b24
JS		 2185 /*
2186 * In the past, we if this was not an FCP-Target, we would
2187 * unconditionally just jump to deleting the rport.
2188 * However, rports can be used as node containers by the LLDD,
2189 * and its not appropriate to just terminate the rport at the
2190 * first sign of a loss in connectivity. The LLDD may want to
2191 * send ELS traffic to re-validate the login. If the rport is
2192 * immediately deleted, it makes it inappropriate for a node
2193 * container.
2194 * So... we now unconditionally wait dev_loss_tmo before
2195 * destroying an rport.
2196 */
2197
aedf3497
JS		 2198 rport->port_state = FC_PORTSTATE_BLOCKED;
2199
2200 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2201
2202 spin_unlock_irqrestore(shost->host_lock, flags);
2203
19a7b4ae 2204 scsi_target_block(&rport->dev);
1da177e4 2205
0f29b966
JS		 2206 /* see if we need to kill io faster than waiting for device loss */
2207 if ((rport->fast_io_fail_tmo != -1) &&
2208 (rport->fast_io_fail_tmo < timeout) && (i->f->terminate_rport_io))
2209 fc_queue_devloss_work(shost, &rport->fail_io_work,
2210 rport->fast_io_fail_tmo * HZ);
2211
19a7b4ae 2212 /* cap the length the devices can be blocked until they are deleted */
aedf3497 2213 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
1da177e4
LT		 2214}
2215EXPORT_SYMBOL(fc_remote_port_delete);
2216
2217/**
2218 * fc_remote_port_rolechg - notifies the fc transport that the roles
2219 * on a remote may have changed.
2220 * @rport: The remote port that changed.
2221 *
2222 * The LLDD calls this routine to notify the transport that the roles
2223 * on a remote port may have changed. The largest effect of this is
2224 * if a port now becomes a FCP Target, it must be allocated a
2225 * scsi target id. If the port is no longer a FCP target, any
2226 * scsi target id value assigned to it will persist in case the
2227 * role changes back to include FCP Target. No changes in the scsi
2228 * midlayer will be invoked if the role changes (in the expectation
2229 * that the role will be resumed. If it doesn't normal error processing
2230 * will take place).
2231 *
2232 * Should not be called from interrupt context.
2233 *
2234 * Notes:
2235 * This routine assumes no locks are held on entry.
2236 **/
2237void
2238fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
2239{
2240 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 2241 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2242 unsigned long flags;
2243 int create = 0;
2244
1da177e4 2245 spin_lock_irqsave(shost->host_lock, flags);
19a7b4ae
JSEC		 2246 if (roles & FC_RPORT_ROLE_FCP_TARGET) {
2247 if (rport->scsi_target_id == -1) {
2248 rport->scsi_target_id = fc_host->next_target_id++;
2249 create = 1;
2250 } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET))
2251 create = 1;
1da177e4 2252 }
1da177e4 2253
19a7b4ae
JSEC		 2254 rport->roles = roles;
2255
aedf3497
JS		 2256 spin_unlock_irqrestore(shost->host_lock, flags);
2257
19a7b4ae
JSEC		 2258 if (create) {
2259 /*
2260 * There may have been a delete timer running on the
2261 * port. Ensure that it is cancelled as we now know
2262 * the port is an FCP Target.
2263 * Note: we know the rport is exists and in an online
2264 * state as the LLDD would not have had an rport
2265 * reference to pass us.
2266 *
2267 * Take no action on the del_timer failure as the state
2268 * machine state change will validate the
2269 * transaction.
2270 */
0f29b966
JS		 2271 if (!cancel_delayed_work(&rport->fail_io_work))
2272 fc_flush_devloss(shost);
19a7b4ae 2273 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2274 fc_flush_devloss(shost);
2275
2276 spin_lock_irqsave(shost->host_lock, flags);
2277 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2278 spin_unlock_irqrestore(shost->host_lock, flags);
2279
2280 /* ensure any stgt delete functions are done */
2281 fc_flush_work(shost);
19a7b4ae 2282
1da177e4 2283 /* initiate a scan of the target */
aedf3497
JS		 2284 spin_lock_irqsave(shost->host_lock, flags);
2285 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2286 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2287 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf 2288 scsi_target_unblock(&rport->dev);
19a7b4ae 2289 }
1da177e4
LT		 2290}
2291EXPORT_SYMBOL(fc_remote_port_rolechg);
2292
2293/**
92740b24
JS		 2294 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port,
2295 * which we blocked, and has now failed to return
2296 * in the allotted time.
19a7b4ae 2297 *
92740b24 2298 * @work: rport target that failed to reappear in the allotted time.
1da177e4
LT		 2299 **/
2300static void
c4028958 2301fc_timeout_deleted_rport(struct work_struct *work)
1da177e4 2302{
c4028958
DH		 2303 struct fc_rport *rport =
2304 container_of(work, struct fc_rport, dev_loss_work.work);
19a7b4ae 2305 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 2306 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
19a7b4ae 2307 unsigned long flags;
1da177e4 2308
19a7b4ae 2309 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2310
aedf3497
JS		 2311 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2312
1da177e4 2313 /*
92740b24
JS		 2314 * If the port is ONLINE, then it came back. If it was a SCSI
2315 * target, validate it still is. If not, tear down the
2316 * scsi_target on it.
1da177e4 2317 */
aedf3497 2318 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
92740b24 2319 (rport->scsi_target_id != -1) &&
aedf3497 2320 !(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
19a7b4ae 2321 dev_printk(KERN_ERR, &rport->dev,
aedf3497
JS		 2322 "blocked FC remote port time out: no longer"
2323 " a FCP target, removing starget\n");
aedf3497 2324 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf
JS		 2325 scsi_target_unblock(&rport->dev);
2326 fc_queue_work(shost, &rport->stgt_delete_work);
19a7b4ae
JSEC		 2327 return;
2328 }
1da177e4 2329
92740b24 2330 /* NOOP state - we're flushing workq's */
19a7b4ae
JSEC		 2331 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
2332 spin_unlock_irqrestore(shost->host_lock, flags);
2333 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 2334 "blocked FC remote port time out: leaving"
2335 " rport%s alone\n",
2336 (rport->scsi_target_id != -1) ? " and starget" : "");
19a7b4ae
JSEC		 2337 return;
2338 }
1da177e4 2339
92740b24
JS		 2340 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
2341 (rport->scsi_target_id == -1)) {
aedf3497
JS		 2342 list_del(&rport->peers);
2343 rport->port_state = FC_PORTSTATE_DELETED;
19a7b4ae 2344 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 2345 "blocked FC remote port time out: removing"
2346 " rport%s\n",
2347 (rport->scsi_target_id != -1) ? " and starget" : "");
aedf3497
JS		 2348 fc_queue_work(shost, &rport->rport_delete_work);
2349 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC		 2350 return;
2351 }
1da177e4 2352
19a7b4ae
JSEC		 2353 dev_printk(KERN_ERR, &rport->dev,
2354 "blocked FC remote port time out: removing target and "
2355 "saving binding\n");
2356
aedf3497 2357 list_move_tail(&rport->peers, &fc_host->rport_bindings);
1da177e4
LT		 2358
2359 /*
19a7b4ae
JSEC		 2360 * Note: We do not remove or clear the hostdata area. This allows
2361 * host-specific target data to persist along with the
2362 * scsi_target_id. It's up to the host to manage it's hostdata area.
1da177e4 2363 */
1da177e4 2364
19a7b4ae
JSEC		 2365 /*
2366 * Reinitialize port attributes that may change if the port comes back.
2367 */
2368 rport->maxframe_size = -1;
2369 rport->supported_classes = FC_COS_UNSPECIFIED;
2370 rport->roles = FC_RPORT_ROLE_UNKNOWN;
aedf3497 2371 rport->port_state = FC_PORTSTATE_NOTPRESENT;
1da177e4 2372
19a7b4ae 2373 /* remove the identifiers that aren't used in the consisting binding */
aedf3497 2374 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 2375 case FC_TGTID_BIND_BY_WWPN:
2376 rport->node_name = -1;
2377 rport->port_id = -1;
2378 break;
2379 case FC_TGTID_BIND_BY_WWNN:
2380 rport->port_name = -1;
2381 rport->port_id = -1;
2382 break;
2383 case FC_TGTID_BIND_BY_ID:
2384 rport->node_name = -1;
2385 rport->port_name = -1;
2386 break;
2387 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2388 break;
2389 }
2390
19a7b4ae
JSEC		 2391 /*
2392 * As this only occurs if the remote port (scsi target)
2393 * went away and didn't come back - we'll remove
2394 * all attached scsi devices.
2395 */
42e33148 2396 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf
JS		 2397
2398 scsi_target_unblock(&rport->dev);
2399 fc_queue_work(shost, &rport->stgt_delete_work);
1da177e4 2400}
1da177e4 2401
0f29b966
JS		 2402/**
2403 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a
2404 * disconnected SCSI target.
2405 *
c4028958 2406 * @work: rport to terminate io on.
0f29b966
JS		 2407 *
2408 * Notes: Only requests the failure of the io, not that all are flushed
2409 * prior to returning.
2410 **/
2411static void
c4028958 2412fc_timeout_fail_rport_io(struct work_struct *work)
0f29b966 2413{
c4028958
DH		 2414 struct fc_rport *rport =
2415 container_of(work, struct fc_rport, fail_io_work.work);
0f29b966
JS		 2416 struct Scsi_Host *shost = rport_to_shost(rport);
2417 struct fc_internal *i = to_fc_internal(shost->transportt);
2418
2419 if (rport->port_state != FC_PORTSTATE_BLOCKED)
2420 return;
2421
2422 i->f->terminate_rport_io(rport);
2423}
2424
1da177e4
LT		 2425/**
2426 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
19a7b4ae 2427 *
c4028958 2428 * @work: remote port to be scanned.
1da177e4
LT		 2429 **/
2430static void
c4028958 2431fc_scsi_scan_rport(struct work_struct *work)
1da177e4 2432{
c4028958
DH		 2433 struct fc_rport *rport =
2434 container_of(work, struct fc_rport, scan_work);
aedf3497 2435 struct Scsi_Host *shost = rport_to_shost(rport);
42e33148
JSEC		 2436 unsigned long flags;
2437
aedf3497
JS		 2438 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
2439 (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
aedf3497
JS		 2440 scsi_scan_target(&rport->dev, rport->channel,
2441 rport->scsi_target_id, SCAN_WILD_CARD, 1);
42e33148 2442 }
aedf3497
JS		 2443
2444 spin_lock_irqsave(shost->host_lock, flags);
2445 rport->flags &= ~FC_RPORT_SCAN_PENDING;
42e33148
JSEC		 2446 spin_unlock_irqrestore(shost->host_lock, flags);
2447}
2448
2449
1da177e4
LT		 2450MODULE_AUTHOR("Martin Hicks");
2451MODULE_DESCRIPTION("FC Transport Attributes");
2452MODULE_LICENSE("GPL");
2453
2454module_init(fc_transport_init);
2455module_exit(fc_transport_exit);
Linux kernel - Deliverables
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