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