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9ef3e4a4 1/*
1da177e4
LT
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 *
a53eb5e0 22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
1da177e4
LT
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
9ef3e4a4 25 * Add vports, etc
1da177e4
LT
26 *
27 */
28#include <linux/module.h>
29#include <linux/init.h>
5a0e3ad6 30#include <linux/slab.h>
65d430fa 31#include <linux/delay.h>
ecc30990 32#include <linux/kernel.h>
1da177e4
LT
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>
c829c394 37#include <scsi/scsi_cmnd.h>
84314fd4
JS
38#include <net/netlink.h>
39#include <scsi/scsi_netlink_fc.h>
9e4f5e29 40#include <scsi/scsi_bsg_fc.h>
1da177e4 41#include "scsi_priv.h"
7525236d 42#include "scsi_transport_fc_internal.h"
1da177e4 43
aedf3497 44static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
9ef3e4a4 45static void fc_vport_sched_delete(struct work_struct *work);
a30c3f69 46static int fc_vport_setup(struct Scsi_Host *shost, int channel,
a53eb5e0
JS
47 struct device *pdev, struct fc_vport_identifiers *ids,
48 struct fc_vport **vport);
9e4f5e29
JS
49static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
50static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
51static void fc_bsg_remove(struct request_queue *);
52static void fc_bsg_goose_queue(struct fc_rport *);
a53eb5e0 53
43ca910a
MC
54/*
55 * Module Parameters
56 */
57
58/*
59 * dev_loss_tmo: the default number of seconds that the FC transport
60 * should insulate the loss of a remote port.
61 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
62 */
63static unsigned int fc_dev_loss_tmo = 60; /* seconds */
64
65module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
66MODULE_PARM_DESC(dev_loss_tmo,
67 "Maximum number of seconds that the FC transport should"
68 " insulate the loss of a remote port. Once this value is"
69 " exceeded, the scsi target is removed. Value should be"
70 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
71 " fast_io_fail_tmo is not set.");
72
1da177e4
LT
73/*
74 * Redefine so that we can have same named attributes in the
75 * sdev/starget/host objects.
76 */
ee959b00
TJ
77#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
78struct device_attribute device_attr_##_prefix##_##_name = \
1da177e4
LT
79 __ATTR(_name,_mode,_show,_store)
80
81#define fc_enum_name_search(title, table_type, table) \
82static const char *get_fc_##title##_name(enum table_type table_key) \
83{ \
84 int i; \
85 char *name = NULL; \
86 \
6391a113 87 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT
88 if (table[i].value == table_key) { \
89 name = table[i].name; \
90 break; \
91 } \
92 } \
93 return name; \
94}
95
96#define fc_enum_name_match(title, table_type, table) \
97static int get_fc_##title##_match(const char *table_key, \
98 enum table_type *value) \
99{ \
100 int i; \
101 \
6391a113 102 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT
103 if (strncmp(table_key, table[i].name, \
104 table[i].matchlen) == 0) { \
105 *value = table[i].value; \
106 return 0; /* success */ \
107 } \
108 } \
109 return 1; /* failure */ \
110}
111
112
113/* Convert fc_port_type values to ascii string name */
114static struct {
115 enum fc_port_type value;
116 char *name;
117} fc_port_type_names[] = {
118 { FC_PORTTYPE_UNKNOWN, "Unknown" },
119 { FC_PORTTYPE_OTHER, "Other" },
120 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
121 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
122 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
123 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
951948a3 124 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
a53eb5e0 125 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
1da177e4
LT
126};
127fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
128#define FC_PORTTYPE_MAX_NAMELEN 50
129
a53eb5e0
JS
130/* Reuse fc_port_type enum function for vport_type */
131#define get_fc_vport_type_name get_fc_port_type_name
132
1da177e4 133
84314fd4
JS
134/* Convert fc_host_event_code values to ascii string name */
135static const struct {
136 enum fc_host_event_code value;
137 char *name;
138} fc_host_event_code_names[] = {
139 { FCH_EVT_LIP, "lip" },
140 { FCH_EVT_LINKUP, "link_up" },
141 { FCH_EVT_LINKDOWN, "link_down" },
142 { FCH_EVT_LIPRESET, "lip_reset" },
143 { FCH_EVT_RSCN, "rscn" },
144 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
145 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
146 { FCH_EVT_PORT_ONLINE, "port_online" },
147 { FCH_EVT_PORT_OFFLINE, "port_offline" },
148 { FCH_EVT_PORT_FABRIC, "port_fabric" },
149 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
150 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
151};
152fc_enum_name_search(host_event_code, fc_host_event_code,
153 fc_host_event_code_names)
154#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
155
156
1da177e4
LT
157/* Convert fc_port_state values to ascii string name */
158static struct {
159 enum fc_port_state value;
160 char *name;
161} fc_port_state_names[] = {
162 { FC_PORTSTATE_UNKNOWN, "Unknown" },
163 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
164 { FC_PORTSTATE_ONLINE, "Online" },
165 { FC_PORTSTATE_OFFLINE, "Offline" },
166 { FC_PORTSTATE_BLOCKED, "Blocked" },
167 { FC_PORTSTATE_BYPASSED, "Bypassed" },
168 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
169 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
170 { FC_PORTSTATE_ERROR, "Error" },
171 { FC_PORTSTATE_LOOPBACK, "Loopback" },
42e33148 172 { FC_PORTSTATE_DELETED, "Deleted" },
1da177e4
LT
173};
174fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
175#define FC_PORTSTATE_MAX_NAMELEN 20
176
177
a53eb5e0
JS
178/* Convert fc_vport_state values to ascii string name */
179static struct {
180 enum fc_vport_state value;
181 char *name;
182} fc_vport_state_names[] = {
183 { FC_VPORT_UNKNOWN, "Unknown" },
184 { FC_VPORT_ACTIVE, "Active" },
185 { FC_VPORT_DISABLED, "Disabled" },
186 { FC_VPORT_LINKDOWN, "Linkdown" },
187 { FC_VPORT_INITIALIZING, "Initializing" },
188 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
189 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
190 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
191 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
192 { FC_VPORT_FAILED, "VPort Failed" },
193};
194fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
195#define FC_VPORTSTATE_MAX_NAMELEN 24
196
197/* Reuse fc_vport_state enum function for vport_last_state */
198#define get_fc_vport_last_state_name get_fc_vport_state_name
199
200
1da177e4 201/* Convert fc_tgtid_binding_type values to ascii string name */
0ad78200 202static const struct {
1da177e4
LT
203 enum fc_tgtid_binding_type value;
204 char *name;
205 int matchlen;
206} fc_tgtid_binding_type_names[] = {
207 { FC_TGTID_BIND_NONE, "none", 4 },
208 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
209 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
210 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
211};
212fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
213 fc_tgtid_binding_type_names)
214fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
215 fc_tgtid_binding_type_names)
216#define FC_BINDTYPE_MAX_NAMELEN 30
217
218
219#define fc_bitfield_name_search(title, table) \
220static ssize_t \
221get_fc_##title##_names(u32 table_key, char *buf) \
222{ \
223 char *prefix = ""; \
224 ssize_t len = 0; \
225 int i; \
226 \
6391a113 227 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT
228 if (table[i].value & table_key) { \
229 len += sprintf(buf + len, "%s%s", \
230 prefix, table[i].name); \
231 prefix = ", "; \
232 } \
233 } \
234 len += sprintf(buf + len, "\n"); \
235 return len; \
236}
237
238
239/* Convert FC_COS bit values to ascii string name */
0ad78200 240static const struct {
1da177e4
LT
241 u32 value;
242 char *name;
243} fc_cos_names[] = {
244 { FC_COS_CLASS1, "Class 1" },
245 { FC_COS_CLASS2, "Class 2" },
246 { FC_COS_CLASS3, "Class 3" },
247 { FC_COS_CLASS4, "Class 4" },
248 { FC_COS_CLASS6, "Class 6" },
249};
250fc_bitfield_name_search(cos, fc_cos_names)
251
252
253/* Convert FC_PORTSPEED bit values to ascii string name */
0ad78200 254static const struct {
1da177e4
LT
255 u32 value;
256 char *name;
257} fc_port_speed_names[] = {
258 { FC_PORTSPEED_1GBIT, "1 Gbit" },
259 { FC_PORTSPEED_2GBIT, "2 Gbit" },
260 { FC_PORTSPEED_4GBIT, "4 Gbit" },
261 { FC_PORTSPEED_10GBIT, "10 Gbit" },
c3d2350a
JS
262 { FC_PORTSPEED_8GBIT, "8 Gbit" },
263 { FC_PORTSPEED_16GBIT, "16 Gbit" },
624f28be 264 { FC_PORTSPEED_32GBIT, "32 Gbit" },
1da177e4
LT
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
a53eb5e0 282/* Convert FC_PORT_ROLE bit values to ascii string name */
0ad78200 283static const struct {
1da177e4
LT
284 u32 value;
285 char *name;
a53eb5e0
JS
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" },
1da177e4 290};
a53eb5e0 291fc_bitfield_name_search(port_roles, fc_port_role_names)
1da177e4
LT
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
c4028958
DH
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);
1da177e4
LT
308
309/*
310 * Attribute counts pre object type...
311 * Increase these values if you add attributes
312 */
313#define FC_STARGET_NUM_ATTRS 3
0f29b966 314#define FC_RPORT_NUM_ATTRS 10
a53eb5e0 315#define FC_VPORT_NUM_ATTRS 9
bb8ef587 316#define FC_HOST_NUM_ATTRS 29
1da177e4
LT
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 */
ee959b00 332 struct device_attribute private_starget_attrs[
1da177e4 333 FC_STARGET_NUM_ATTRS];
ee959b00 334 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
1da177e4 335
ee959b00
TJ
336 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
337 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
1da177e4
LT
338
339 struct transport_container rport_attr_cont;
ee959b00
TJ
340 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
341 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
a53eb5e0
JS
342
343 struct transport_container vport_attr_cont;
ee959b00
TJ
344 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
345 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
1da177e4
LT
346};
347
348#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
349
d0a7e574 350static int fc_target_setup(struct transport_container *tc, struct device *dev,
ee959b00 351 struct device *cdev)
1da177e4
LT
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
d0a7e574 380static int fc_host_setup(struct transport_container *tc, struct device *dev,
ee959b00 381 struct device *cdev)
1da177e4
LT
382{
383 struct Scsi_Host *shost = dev_to_shost(dev);
aedf3497 384 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4 385
9ef3e4a4 386 /*
1da177e4
LT
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 */
aedf3497
JS
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));
aedf3497
JS
397 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
398 fc_host->maxframe_size = -1;
a53eb5e0 399 fc_host->max_npiv_vports = 0;
aedf3497
JS
400 memset(fc_host->serial_number, 0,
401 sizeof(fc_host->serial_number));
bb8ef587
NP
402 memset(fc_host->manufacturer, 0,
403 sizeof(fc_host->manufacturer));
404 memset(fc_host->model, 0,
405 sizeof(fc_host->model));
406 memset(fc_host->model_description, 0,
407 sizeof(fc_host->model_description));
408 memset(fc_host->hardware_version, 0,
409 sizeof(fc_host->hardware_version));
410 memset(fc_host->driver_version, 0,
411 sizeof(fc_host->driver_version));
412 memset(fc_host->firmware_version, 0,
413 sizeof(fc_host->firmware_version));
414 memset(fc_host->optionrom_version, 0,
415 sizeof(fc_host->optionrom_version));
aedf3497
JS
416
417 fc_host->port_id = -1;
418 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
419 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
420 memset(fc_host->active_fc4s, 0,
421 sizeof(fc_host->active_fc4s));
422 fc_host->speed = FC_PORTSPEED_UNKNOWN;
423 fc_host->fabric_name = -1;
b8d08210
JS
424 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
425 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
aedf3497
JS
426
427 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
428
429 INIT_LIST_HEAD(&fc_host->rports);
430 INIT_LIST_HEAD(&fc_host->rport_bindings);
a53eb5e0 431 INIT_LIST_HEAD(&fc_host->vports);
aedf3497
JS
432 fc_host->next_rport_number = 0;
433 fc_host->next_target_id = 0;
a53eb5e0
JS
434 fc_host->next_vport_number = 0;
435 fc_host->npiv_vports_inuse = 0;
aedf3497 436
aab0de24
KS
437 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
438 "fc_wq_%d", shost->host_no);
d8537548 439 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
aedf3497
JS
440 if (!fc_host->work_q)
441 return -ENOMEM;
442
43ca910a 443 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
aab0de24
KS
444 snprintf(fc_host->devloss_work_q_name,
445 sizeof(fc_host->devloss_work_q_name),
446 "fc_dl_%d", shost->host_no);
d8537548
KC
447 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
448 fc_host->devloss_work_q_name);
aedf3497
JS
449 if (!fc_host->devloss_work_q) {
450 destroy_workqueue(fc_host->work_q);
451 fc_host->work_q = NULL;
452 return -ENOMEM;
453 }
454
9e4f5e29
JS
455 fc_bsg_hostadd(shost, fc_host);
456 /* ignore any bsg add error - we just can't do sgio */
457
458 return 0;
459}
460
461static int fc_host_remove(struct transport_container *tc, struct device *dev,
462 struct device *cdev)
463{
464 struct Scsi_Host *shost = dev_to_shost(dev);
465 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
466
467 fc_bsg_remove(fc_host->rqst_q);
1da177e4
LT
468 return 0;
469}
470
471static DECLARE_TRANSPORT_CLASS(fc_host_class,
472 "fc_host",
473 fc_host_setup,
9e4f5e29 474 fc_host_remove,
1da177e4
LT
475 NULL);
476
477/*
478 * Setup and Remove actions for remote ports are handled
479 * in the service functions below.
480 */
481static DECLARE_TRANSPORT_CLASS(fc_rport_class,
482 "fc_remote_ports",
483 NULL,
484 NULL,
485 NULL);
486
a53eb5e0
JS
487/*
488 * Setup and Remove actions for virtual ports are handled
489 * in the service functions below.
490 */
491static DECLARE_TRANSPORT_CLASS(fc_vport_class,
492 "fc_vports",
493 NULL,
494 NULL,
495 NULL);
496
eb44820c 497/*
84314fd4 498 * Netlink Infrastructure
eb44820c 499 */
84314fd4
JS
500
501static atomic_t fc_event_seq;
502
503/**
504 * fc_get_event_number - Obtain the next sequential FC event number
505 *
506 * Notes:
eb44820c 507 * We could have inlined this, but it would have required fc_event_seq to
84314fd4
JS
508 * be exposed. For now, live with the subroutine call.
509 * Atomic used to avoid lock/unlock...
eb44820c 510 */
84314fd4
JS
511u32
512fc_get_event_number(void)
513{
514 return atomic_add_return(1, &fc_event_seq);
515}
516EXPORT_SYMBOL(fc_get_event_number);
517
518
519/**
520 * fc_host_post_event - called to post an even on an fc_host.
84314fd4
JS
521 * @shost: host the event occurred on
522 * @event_number: fc event number obtained from get_fc_event_number()
523 * @event_code: fc_host event being posted
524 * @event_data: 32bits of data for the event being posted
525 *
526 * Notes:
527 * This routine assumes no locks are held on entry.
eb44820c 528 */
84314fd4
JS
529void
530fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
531 enum fc_host_event_code event_code, u32 event_data)
532{
533 struct sk_buff *skb;
534 struct nlmsghdr *nlh;
535 struct fc_nl_event *event;
536 const char *name;
e07ebea0 537 u32 len;
84314fd4
JS
538 int err;
539
540 if (!scsi_nl_sock) {
541 err = -ENOENT;
542 goto send_fail;
543 }
544
545 len = FC_NL_MSGALIGN(sizeof(*event));
84314fd4 546
e07ebea0 547 skb = nlmsg_new(len, GFP_KERNEL);
84314fd4
JS
548 if (!skb) {
549 err = -ENOBUFS;
550 goto send_fail;
551 }
552
e07ebea0 553 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
84314fd4
JS
554 if (!nlh) {
555 err = -ENOBUFS;
556 goto send_fail_skb;
557 }
e07ebea0 558 event = nlmsg_data(nlh);
84314fd4
JS
559
560 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
561 FC_NL_ASYNC_EVENT, len);
562 event->seconds = get_seconds();
563 event->vendor_id = 0;
564 event->host_no = shost->host_no;
565 event->event_datalen = sizeof(u32); /* bytes */
566 event->event_num = event_number;
567 event->event_code = event_code;
568 event->event_data = event_data;
569
ff491a73
PNA
570 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
571 GFP_KERNEL);
84314fd4
JS
572 return;
573
574send_fail_skb:
575 kfree_skb(skb);
576send_fail:
577 name = get_fc_host_event_code_name(event_code);
578 printk(KERN_WARNING
579 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
cadbd4a5 580 __func__, shost->host_no,
84314fd4
JS
581 (name) ? name : "<unknown>", event_data, err);
582 return;
583}
584EXPORT_SYMBOL(fc_host_post_event);
585
586
587/**
eb44820c 588 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
84314fd4
JS
589 * @shost: host the event occurred on
590 * @event_number: fc event number obtained from get_fc_event_number()
591 * @data_len: amount, in bytes, of vendor unique data
592 * @data_buf: pointer to vendor unique data
eb44820c 593 * @vendor_id: Vendor id
84314fd4
JS
594 *
595 * Notes:
596 * This routine assumes no locks are held on entry.
eb44820c 597 */
84314fd4
JS
598void
599fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
f14e2e29 600 u32 data_len, char * data_buf, u64 vendor_id)
84314fd4
JS
601{
602 struct sk_buff *skb;
603 struct nlmsghdr *nlh;
604 struct fc_nl_event *event;
e07ebea0 605 u32 len;
84314fd4
JS
606 int err;
607
608 if (!scsi_nl_sock) {
609 err = -ENOENT;
610 goto send_vendor_fail;
611 }
612
613 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
84314fd4 614
e07ebea0 615 skb = nlmsg_new(len, GFP_KERNEL);
84314fd4
JS
616 if (!skb) {
617 err = -ENOBUFS;
618 goto send_vendor_fail;
619 }
620
e07ebea0 621 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
84314fd4
JS
622 if (!nlh) {
623 err = -ENOBUFS;
624 goto send_vendor_fail_skb;
625 }
e07ebea0 626 event = nlmsg_data(nlh);
84314fd4
JS
627
628 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
629 FC_NL_ASYNC_EVENT, len);
630 event->seconds = get_seconds();
631 event->vendor_id = vendor_id;
632 event->host_no = shost->host_no;
633 event->event_datalen = data_len; /* bytes */
634 event->event_num = event_number;
635 event->event_code = FCH_EVT_VENDOR_UNIQUE;
636 memcpy(&event->event_data, data_buf, data_len);
637
ff491a73
PNA
638 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
639 GFP_KERNEL);
84314fd4
JS
640 return;
641
642send_vendor_fail_skb:
643 kfree_skb(skb);
644send_vendor_fail:
645 printk(KERN_WARNING
646 "%s: Dropped Event : host %d vendor_unique - err %d\n",
cadbd4a5 647 __func__, shost->host_no, err);
84314fd4
JS
648 return;
649}
650EXPORT_SYMBOL(fc_host_post_vendor_event);
651
652
1da177e4
LT
653
654static __init int fc_transport_init(void)
655{
84314fd4
JS
656 int error;
657
658 atomic_set(&fc_event_seq, 0);
659
660 error = transport_class_register(&fc_host_class);
a53eb5e0
JS
661 if (error)
662 return error;
663 error = transport_class_register(&fc_vport_class);
1da177e4 664 if (error)
48de68a4 665 goto unreg_host_class;
1da177e4
LT
666 error = transport_class_register(&fc_rport_class);
667 if (error)
48de68a4
MC
668 goto unreg_vport_class;
669 error = transport_class_register(&fc_transport_class);
670 if (error)
671 goto unreg_rport_class;
672 return 0;
673
674unreg_rport_class:
675 transport_class_unregister(&fc_rport_class);
676unreg_vport_class:
677 transport_class_unregister(&fc_vport_class);
678unreg_host_class:
679 transport_class_unregister(&fc_host_class);
680 return error;
1da177e4
LT
681}
682
683static void __exit fc_transport_exit(void)
684{
685 transport_class_unregister(&fc_transport_class);
686 transport_class_unregister(&fc_rport_class);
687 transport_class_unregister(&fc_host_class);
a53eb5e0 688 transport_class_unregister(&fc_vport_class);
1da177e4
LT
689}
690
691/*
692 * FC Remote Port Attribute Management
693 */
694
695#define fc_rport_show_function(field, format_string, sz, cast) \
696static ssize_t \
ee959b00
TJ
697show_fc_rport_##field (struct device *dev, \
698 struct device_attribute *attr, char *buf) \
1da177e4 699{ \
ee959b00 700 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT
701 struct Scsi_Host *shost = rport_to_shost(rport); \
702 struct fc_internal *i = to_fc_internal(shost->transportt); \
19a7b4ae
JSEC
703 if ((i->f->get_rport_##field) && \
704 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 705 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae 706 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
1da177e4
LT
707 i->f->get_rport_##field(rport); \
708 return snprintf(buf, sz, format_string, cast rport->field); \
709}
710
711#define fc_rport_store_function(field) \
712static ssize_t \
ee959b00
TJ
713store_fc_rport_##field(struct device *dev, \
714 struct device_attribute *attr, \
715 const char *buf, size_t count) \
1da177e4
LT
716{ \
717 int val; \
ee959b00 718 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT
719 struct Scsi_Host *shost = rport_to_shost(rport); \
720 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 721 char *cp; \
19a7b4ae 722 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 723 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae
JSEC
724 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
725 return -EBUSY; \
0f29b966
JS
726 val = simple_strtoul(buf, &cp, 0); \
727 if (*cp && (*cp != '\n')) \
728 return -EINVAL; \
1da177e4
LT
729 i->f->set_rport_##field(rport, val); \
730 return count; \
731}
732
733#define fc_rport_rd_attr(field, format_string, sz) \
734 fc_rport_show_function(field, format_string, sz, ) \
ee959b00 735static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT
736 show_fc_rport_##field, NULL)
737
738#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
739 fc_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 740static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT
741 show_fc_rport_##field, NULL)
742
743#define fc_rport_rw_attr(field, format_string, sz) \
744 fc_rport_show_function(field, format_string, sz, ) \
745 fc_rport_store_function(field) \
ee959b00 746static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1da177e4
LT
747 show_fc_rport_##field, \
748 store_fc_rport_##field)
749
750
751#define fc_private_rport_show_function(field, format_string, sz, cast) \
752static ssize_t \
ee959b00
TJ
753show_fc_rport_##field (struct device *dev, \
754 struct device_attribute *attr, char *buf) \
1da177e4 755{ \
ee959b00 756 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT
757 return snprintf(buf, sz, format_string, cast rport->field); \
758}
759
760#define fc_private_rport_rd_attr(field, format_string, sz) \
761 fc_private_rport_show_function(field, format_string, sz, ) \
ee959b00 762static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT
763 show_fc_rport_##field, NULL)
764
765#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
766 fc_private_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 767static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT
768 show_fc_rport_##field, NULL)
769
770
771#define fc_private_rport_rd_enum_attr(title, maxlen) \
772static ssize_t \
ee959b00
TJ
773show_fc_rport_##title (struct device *dev, \
774 struct device_attribute *attr, char *buf) \
1da177e4 775{ \
ee959b00 776 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT
777 const char *name; \
778 name = get_fc_##title##_name(rport->title); \
779 if (!name) \
780 return -EINVAL; \
781 return snprintf(buf, maxlen, "%s\n", name); \
782} \
ee959b00 783static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1da177e4
LT
784 show_fc_rport_##title, NULL)
785
786
787#define SETUP_RPORT_ATTRIBUTE_RD(field) \
ee959b00 788 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT
789 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
790 i->private_rport_attrs[count].store = NULL; \
791 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
792 if (i->f->show_rport_##field) \
793 count++
794
795#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
ee959b00 796 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT
797 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
798 i->private_rport_attrs[count].store = NULL; \
799 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
800 count++
801
802#define SETUP_RPORT_ATTRIBUTE_RW(field) \
ee959b00 803 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT
804 if (!i->f->set_rport_##field) { \
805 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
806 i->private_rport_attrs[count].store = NULL; \
807 } \
808 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
809 if (i->f->show_rport_##field) \
810 count++
811
0f29b966
JS
812#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
813{ \
ee959b00 814 i->private_rport_attrs[count] = device_attr_rport_##field; \
0f29b966
JS
815 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
816 count++; \
817}
818
1da177e4
LT
819
820/* The FC Transport Remote Port Attributes: */
821
822/* Fixed Remote Port Attributes */
823
824fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
825
826static ssize_t
ee959b00
TJ
827show_fc_rport_supported_classes (struct device *dev,
828 struct device_attribute *attr, char *buf)
1da177e4 829{
ee959b00 830 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT
831 if (rport->supported_classes == FC_COS_UNSPECIFIED)
832 return snprintf(buf, 20, "unspecified\n");
833 return get_fc_cos_names(rport->supported_classes, buf);
834}
ee959b00 835static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1da177e4
LT
836 show_fc_rport_supported_classes, NULL);
837
838/* Dynamic Remote Port Attributes */
839
19a7b4ae
JSEC
840/*
841 * dev_loss_tmo attribute
842 */
43ca910a
MC
843static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
844{
845 char *cp;
846
847 *val = simple_strtoul(buf, &cp, 0);
848 if ((*cp && (*cp != '\n')) || (*val < 0))
849 return -EINVAL;
850 /*
851 * Check for overflow; dev_loss_tmo is u32
852 */
853 if (*val > UINT_MAX)
854 return -EINVAL;
855
856 return 0;
857}
858
859static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
860 unsigned long val)
19a7b4ae 861{
19a7b4ae
JSEC
862 struct Scsi_Host *shost = rport_to_shost(rport);
863 struct fc_internal *i = to_fc_internal(shost->transportt);
43ca910a 864
19a7b4ae 865 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
42e33148 866 (rport->port_state == FC_PORTSTATE_DELETED) ||
19a7b4ae
JSEC
867 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
868 return -EBUSY;
36dd288f
HR
869 /*
870 * Check for overflow; dev_loss_tmo is u32
871 */
872 if (val > UINT_MAX)
873 return -EINVAL;
874
f2818663
HR
875 /*
876 * If fast_io_fail is off we have to cap
877 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
878 */
879 if (rport->fast_io_fail_tmo == -1 &&
880 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
881 return -EINVAL;
882
19a7b4ae 883 i->f->set_rport_dev_loss_tmo(rport, val);
43ca910a
MC
884 return 0;
885}
886
887fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
888static ssize_t
889store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
890 const char *buf, size_t count)
891{
892 struct fc_rport *rport = transport_class_to_rport(dev);
893 unsigned long val;
894 int rc;
895
896 rc = fc_str_to_dev_loss(buf, &val);
897 if (rc)
898 return rc;
899
900 rc = fc_rport_set_dev_loss_tmo(rport, val);
901 if (rc)
902 return rc;
19a7b4ae
JSEC
903 return count;
904}
ee959b00 905static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
19a7b4ae 906 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1da177e4
LT
907
908
909/* Private Remote Port Attributes */
910
911fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
912fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
913fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
914
915static ssize_t
ee959b00
TJ
916show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
917 char *buf)
1da177e4 918{
ee959b00 919 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT
920
921 /* identify any roles that are port_id specific */
922 if ((rport->port_id != -1) &&
923 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
924 FC_WELLKNOWN_PORTID_MASK) {
925 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
926 case FC_FPORT_PORTID:
927 return snprintf(buf, 30, "Fabric Port\n");
928 case FC_FABCTLR_PORTID:
929 return snprintf(buf, 30, "Fabric Controller\n");
930 case FC_DIRSRVR_PORTID:
931 return snprintf(buf, 30, "Directory Server\n");
932 case FC_TIMESRVR_PORTID:
933 return snprintf(buf, 30, "Time Server\n");
934 case FC_MGMTSRVR_PORTID:
935 return snprintf(buf, 30, "Management Server\n");
936 default:
937 return snprintf(buf, 30, "Unknown Fabric Entity\n");
938 }
939 } else {
a53eb5e0 940 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1da177e4 941 return snprintf(buf, 20, "unknown\n");
a53eb5e0 942 return get_fc_port_roles_names(rport->roles, buf);
1da177e4
LT
943 }
944}
ee959b00 945static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1da177e4
LT
946 show_fc_rport_roles, NULL);
947
948fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
949fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
950
0f29b966
JS
951/*
952 * fast_io_fail_tmo attribute
953 */
954static ssize_t
ee959b00
TJ
955show_fc_rport_fast_io_fail_tmo (struct device *dev,
956 struct device_attribute *attr, char *buf)
0f29b966 957{
ee959b00 958 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS
959
960 if (rport->fast_io_fail_tmo == -1)
961 return snprintf(buf, 5, "off\n");
962 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
963}
964
965static ssize_t
ee959b00
TJ
966store_fc_rport_fast_io_fail_tmo(struct device *dev,
967 struct device_attribute *attr, const char *buf,
968 size_t count)
0f29b966
JS
969{
970 int val;
971 char *cp;
ee959b00 972 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS
973
974 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
975 (rport->port_state == FC_PORTSTATE_DELETED) ||
976 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
977 return -EBUSY;
978 if (strncmp(buf, "off", 3) == 0)
979 rport->fast_io_fail_tmo = -1;
980 else {
981 val = simple_strtoul(buf, &cp, 0);
f2818663
HR
982 if ((*cp && (*cp != '\n')) || (val < 0))
983 return -EINVAL;
984 /*
985 * Cap fast_io_fail by dev_loss_tmo or
986 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
987 */
988 if ((val >= rport->dev_loss_tmo) ||
989 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
0f29b966 990 return -EINVAL;
f2818663 991
0f29b966
JS
992 rport->fast_io_fail_tmo = val;
993 }
994 return count;
995}
ee959b00 996static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
0f29b966 997 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1da177e4
LT
998
999
1000/*
1001 * FC SCSI Target Attribute Management
1002 */
1003
1004/*
1005 * Note: in the target show function we recognize when the remote
732bee7a 1006 * port is in the hierarchy and do not allow the driver to get
1da177e4
LT
1007 * involved in sysfs functions. The driver only gets involved if
1008 * it's the "old" style that doesn't use rports.
1009 */
1010#define fc_starget_show_function(field, format_string, sz, cast) \
1011static ssize_t \
ee959b00
TJ
1012show_fc_starget_##field (struct device *dev, \
1013 struct device_attribute *attr, char *buf) \
1da177e4 1014{ \
ee959b00 1015 struct scsi_target *starget = transport_class_to_starget(dev); \
1da177e4
LT
1016 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1017 struct fc_internal *i = to_fc_internal(shost->transportt); \
1018 struct fc_rport *rport = starget_to_rport(starget); \
1019 if (rport) \
1020 fc_starget_##field(starget) = rport->field; \
1021 else if (i->f->get_starget_##field) \
1022 i->f->get_starget_##field(starget); \
1023 return snprintf(buf, sz, format_string, \
1024 cast fc_starget_##field(starget)); \
1025}
1026
1027#define fc_starget_rd_attr(field, format_string, sz) \
1028 fc_starget_show_function(field, format_string, sz, ) \
ee959b00 1029static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT
1030 show_fc_starget_##field, NULL)
1031
1032#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1033 fc_starget_show_function(field, format_string, sz, (cast)) \
ee959b00 1034static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT
1035 show_fc_starget_##field, NULL)
1036
1037#define SETUP_STARGET_ATTRIBUTE_RD(field) \
ee959b00 1038 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT
1039 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1040 i->private_starget_attrs[count].store = NULL; \
1041 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1042 if (i->f->show_starget_##field) \
1043 count++
1044
1045#define SETUP_STARGET_ATTRIBUTE_RW(field) \
ee959b00 1046 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT
1047 if (!i->f->set_starget_##field) { \
1048 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1049 i->private_starget_attrs[count].store = NULL; \
1050 } \
1051 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1052 if (i->f->show_starget_##field) \
1053 count++
1054
1055/* The FC Transport SCSI Target Attributes: */
1056fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1057fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1058fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1059
1060
a53eb5e0
JS
1061/*
1062 * FC Virtual Port Attribute Management
1063 */
1064
1065#define fc_vport_show_function(field, format_string, sz, cast) \
1066static ssize_t \
ee959b00
TJ
1067show_fc_vport_##field (struct device *dev, \
1068 struct device_attribute *attr, char *buf) \
a53eb5e0 1069{ \
ee959b00 1070 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS
1071 struct Scsi_Host *shost = vport_to_shost(vport); \
1072 struct fc_internal *i = to_fc_internal(shost->transportt); \
1073 if ((i->f->get_vport_##field) && \
1074 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1075 i->f->get_vport_##field(vport); \
1076 return snprintf(buf, sz, format_string, cast vport->field); \
1077}
1078
1079#define fc_vport_store_function(field) \
1080static ssize_t \
ee959b00
TJ
1081store_fc_vport_##field(struct device *dev, \
1082 struct device_attribute *attr, \
1083 const char *buf, size_t count) \
a53eb5e0
JS
1084{ \
1085 int val; \
ee959b00 1086 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS
1087 struct Scsi_Host *shost = vport_to_shost(vport); \
1088 struct fc_internal *i = to_fc_internal(shost->transportt); \
1089 char *cp; \
1090 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1091 return -EBUSY; \
1092 val = simple_strtoul(buf, &cp, 0); \
1093 if (*cp && (*cp != '\n')) \
1094 return -EINVAL; \
1095 i->f->set_vport_##field(vport, val); \
1096 return count; \
1097}
1098
1099#define fc_vport_store_str_function(field, slen) \
1100static ssize_t \
ee959b00
TJ
1101store_fc_vport_##field(struct device *dev, \
1102 struct device_attribute *attr, \
1103 const char *buf, size_t count) \
a53eb5e0 1104{ \
ee959b00 1105 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS
1106 struct Scsi_Host *shost = vport_to_shost(vport); \
1107 struct fc_internal *i = to_fc_internal(shost->transportt); \
1108 unsigned int cnt=count; \
1109 \
1110 /* count may include a LF at end of string */ \
1111 if (buf[cnt-1] == '\n') \
1112 cnt--; \
1113 if (cnt > ((slen) - 1)) \
1114 return -EINVAL; \
1115 memcpy(vport->field, buf, cnt); \
1116 i->f->set_vport_##field(vport); \
1117 return count; \
1118}
1119
1120#define fc_vport_rd_attr(field, format_string, sz) \
1121 fc_vport_show_function(field, format_string, sz, ) \
ee959b00 1122static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS
1123 show_fc_vport_##field, NULL)
1124
1125#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1126 fc_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1127static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS
1128 show_fc_vport_##field, NULL)
1129
1130#define fc_vport_rw_attr(field, format_string, sz) \
1131 fc_vport_show_function(field, format_string, sz, ) \
1132 fc_vport_store_function(field) \
ee959b00 1133static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS
1134 show_fc_vport_##field, \
1135 store_fc_vport_##field)
1136
1137#define fc_private_vport_show_function(field, format_string, sz, cast) \
1138static ssize_t \
ee959b00
TJ
1139show_fc_vport_##field (struct device *dev, \
1140 struct device_attribute *attr, char *buf) \
a53eb5e0 1141{ \
ee959b00 1142 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS
1143 return snprintf(buf, sz, format_string, cast vport->field); \
1144}
1145
1146#define fc_private_vport_store_u32_function(field) \
1147static ssize_t \
ee959b00
TJ
1148store_fc_vport_##field(struct device *dev, \
1149 struct device_attribute *attr, \
1150 const char *buf, size_t count) \
a53eb5e0
JS
1151{ \
1152 u32 val; \
ee959b00 1153 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS
1154 char *cp; \
1155 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1156 return -EBUSY; \
1157 val = simple_strtoul(buf, &cp, 0); \
1158 if (*cp && (*cp != '\n')) \
1159 return -EINVAL; \
1160 vport->field = val; \
1161 return count; \
1162}
1163
1164
1165#define fc_private_vport_rd_attr(field, format_string, sz) \
1166 fc_private_vport_show_function(field, format_string, sz, ) \
ee959b00 1167static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS
1168 show_fc_vport_##field, NULL)
1169
1170#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1171 fc_private_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1172static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS
1173 show_fc_vport_##field, NULL)
1174
1175#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1176 fc_private_vport_show_function(field, format_string, sz, ) \
1177 fc_private_vport_store_u32_function(field) \
ee959b00 1178static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS
1179 show_fc_vport_##field, \
1180 store_fc_vport_##field)
1181
1182
1183#define fc_private_vport_rd_enum_attr(title, maxlen) \
1184static ssize_t \
ee959b00
TJ
1185show_fc_vport_##title (struct device *dev, \
1186 struct device_attribute *attr, \
1187 char *buf) \
a53eb5e0 1188{ \
ee959b00 1189 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS
1190 const char *name; \
1191 name = get_fc_##title##_name(vport->title); \
1192 if (!name) \
1193 return -EINVAL; \
1194 return snprintf(buf, maxlen, "%s\n", name); \
1195} \
ee959b00 1196static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
a53eb5e0
JS
1197 show_fc_vport_##title, NULL)
1198
1199
1200#define SETUP_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1201 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS
1202 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1203 i->private_vport_attrs[count].store = NULL; \
1204 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1205 if (i->f->get_##field) \
1206 count++
1207 /* NOTE: Above MACRO differs: checks function not show bit */
1208
1209#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1210 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS
1211 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1212 i->private_vport_attrs[count].store = NULL; \
1213 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1214 count++
1215
1216#define SETUP_VPORT_ATTRIBUTE_WR(field) \
ee959b00 1217 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS
1218 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1219 if (i->f->field) \
1220 count++
1221 /* NOTE: Above MACRO differs: checks function */
1222
1223#define SETUP_VPORT_ATTRIBUTE_RW(field) \
ee959b00 1224 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS
1225 if (!i->f->set_vport_##field) { \
1226 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1227 i->private_vport_attrs[count].store = NULL; \
1228 } \
1229 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1230 count++
1231 /* NOTE: Above MACRO differs: does not check show bit */
1232
1233#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1234{ \
ee959b00 1235 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS
1236 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1237 count++; \
1238}
1239
1240
1241/* The FC Transport Virtual Port Attributes: */
1242
1243/* Fixed Virtual Port Attributes */
1244
1245/* Dynamic Virtual Port Attributes */
1246
1247/* Private Virtual Port Attributes */
1248
1249fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1250fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1251fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1252fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1253
1254static ssize_t
ee959b00
TJ
1255show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1256 char *buf)
a53eb5e0 1257{
ee959b00 1258 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS
1259
1260 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1261 return snprintf(buf, 20, "unknown\n");
1262 return get_fc_port_roles_names(vport->roles, buf);
1263}
ee959b00 1264static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
a53eb5e0
JS
1265
1266fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1267
1268fc_private_vport_show_function(symbolic_name, "%s\n",
1269 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1270fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
ee959b00 1271static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
a53eb5e0
JS
1272 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1273
1274static ssize_t
ee959b00
TJ
1275store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1276 const char *buf, size_t count)
a53eb5e0 1277{
ee959b00 1278 struct fc_vport *vport = transport_class_to_vport(dev);
9ef3e4a4 1279 struct Scsi_Host *shost = vport_to_shost(vport);
0d9dc7c8
GR
1280 unsigned long flags;
1281
1282 spin_lock_irqsave(shost->host_lock, flags);
1283 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1284 spin_unlock_irqrestore(shost->host_lock, flags);
1285 return -EBUSY;
1286 }
1287 vport->flags |= FC_VPORT_DELETING;
1288 spin_unlock_irqrestore(shost->host_lock, flags);
a53eb5e0 1289
9ef3e4a4 1290 fc_queue_work(shost, &vport->vport_delete_work);
a53eb5e0
JS
1291 return count;
1292}
ee959b00 1293static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
a53eb5e0
JS
1294 NULL, store_fc_vport_delete);
1295
1296
1297/*
1298 * Enable/Disable vport
1299 * Write "1" to disable, write "0" to enable
1300 */
1301static ssize_t
ee959b00
TJ
1302store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1303 const char *buf,
a53eb5e0
JS
1304 size_t count)
1305{
ee959b00 1306 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS
1307 struct Scsi_Host *shost = vport_to_shost(vport);
1308 struct fc_internal *i = to_fc_internal(shost->transportt);
1309 int stat;
1310
1311 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1312 return -EBUSY;
1313
1314 if (*buf == '0') {
1315 if (vport->vport_state != FC_VPORT_DISABLED)
1316 return -EALREADY;
1317 } else if (*buf == '1') {
1318 if (vport->vport_state == FC_VPORT_DISABLED)
1319 return -EALREADY;
1320 } else
1321 return -EINVAL;
1322
1323 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1324 return stat ? stat : count;
1325}
ee959b00 1326static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
a53eb5e0
JS
1327 NULL, store_fc_vport_disable);
1328
1329
1da177e4
LT
1330/*
1331 * Host Attribute Management
1332 */
1333
1334#define fc_host_show_function(field, format_string, sz, cast) \
1335static ssize_t \
ee959b00
TJ
1336show_fc_host_##field (struct device *dev, \
1337 struct device_attribute *attr, char *buf) \
1da177e4 1338{ \
ee959b00 1339 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT
1340 struct fc_internal *i = to_fc_internal(shost->transportt); \
1341 if (i->f->get_host_##field) \
1342 i->f->get_host_##field(shost); \
1343 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1344}
1345
1346#define fc_host_store_function(field) \
1347static ssize_t \
ee959b00
TJ
1348store_fc_host_##field(struct device *dev, \
1349 struct device_attribute *attr, \
1350 const char *buf, size_t count) \
1da177e4
LT
1351{ \
1352 int val; \
ee959b00 1353 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4 1354 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 1355 char *cp; \
1da177e4 1356 \
0f29b966
JS
1357 val = simple_strtoul(buf, &cp, 0); \
1358 if (*cp && (*cp != '\n')) \
1359 return -EINVAL; \
1da177e4
LT
1360 i->f->set_host_##field(shost, val); \
1361 return count; \
1362}
1363
b8d08210
JS
1364#define fc_host_store_str_function(field, slen) \
1365static ssize_t \
ee959b00
TJ
1366store_fc_host_##field(struct device *dev, \
1367 struct device_attribute *attr, \
1368 const char *buf, size_t count) \
b8d08210 1369{ \
ee959b00 1370 struct Scsi_Host *shost = transport_class_to_shost(dev); \
b8d08210
JS
1371 struct fc_internal *i = to_fc_internal(shost->transportt); \
1372 unsigned int cnt=count; \
1373 \
1374 /* count may include a LF at end of string */ \
1375 if (buf[cnt-1] == '\n') \
1376 cnt--; \
1377 if (cnt > ((slen) - 1)) \
1378 return -EINVAL; \
1379 memcpy(fc_host_##field(shost), buf, cnt); \
1380 i->f->set_host_##field(shost); \
1381 return count; \
1382}
1383
1da177e4
LT
1384#define fc_host_rd_attr(field, format_string, sz) \
1385 fc_host_show_function(field, format_string, sz, ) \
ee959b00 1386static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT
1387 show_fc_host_##field, NULL)
1388
1389#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1390 fc_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1391static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT
1392 show_fc_host_##field, NULL)
1393
1394#define fc_host_rw_attr(field, format_string, sz) \
1395 fc_host_show_function(field, format_string, sz, ) \
1396 fc_host_store_function(field) \
ee959b00 1397static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1da177e4
LT
1398 show_fc_host_##field, \
1399 store_fc_host_##field)
1400
1401#define fc_host_rd_enum_attr(title, maxlen) \
1402static ssize_t \
ee959b00
TJ
1403show_fc_host_##title (struct device *dev, \
1404 struct device_attribute *attr, char *buf) \
1da177e4 1405{ \
ee959b00 1406 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT
1407 struct fc_internal *i = to_fc_internal(shost->transportt); \
1408 const char *name; \
1409 if (i->f->get_host_##title) \
1410 i->f->get_host_##title(shost); \
1411 name = get_fc_##title##_name(fc_host_##title(shost)); \
1412 if (!name) \
1413 return -EINVAL; \
1414 return snprintf(buf, maxlen, "%s\n", name); \
1415} \
ee959b00 1416static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1da177e4
LT
1417
1418#define SETUP_HOST_ATTRIBUTE_RD(field) \
ee959b00 1419 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT
1420 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1421 i->private_host_attrs[count].store = NULL; \
1422 i->host_attrs[count] = &i->private_host_attrs[count]; \
1423 if (i->f->show_host_##field) \
1424 count++
1425
a53eb5e0 1426#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
ee959b00 1427 i->private_host_attrs[count] = device_attr_host_##field; \
a53eb5e0
JS
1428 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1429 i->private_host_attrs[count].store = NULL; \
1430 i->host_attrs[count] = &i->private_host_attrs[count]; \
1431 count++
1432
1da177e4 1433#define SETUP_HOST_ATTRIBUTE_RW(field) \
ee959b00 1434 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT
1435 if (!i->f->set_host_##field) { \
1436 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1437 i->private_host_attrs[count].store = NULL; \
1438 } \
1439 i->host_attrs[count] = &i->private_host_attrs[count]; \
1440 if (i->f->show_host_##field) \
1441 count++
1442
1443
1444#define fc_private_host_show_function(field, format_string, sz, cast) \
1445static ssize_t \
ee959b00
TJ
1446show_fc_host_##field (struct device *dev, \
1447 struct device_attribute *attr, char *buf) \
1da177e4 1448{ \
ee959b00 1449 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT
1450 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1451}
1452
1453#define fc_private_host_rd_attr(field, format_string, sz) \
1454 fc_private_host_show_function(field, format_string, sz, ) \
ee959b00 1455static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT
1456 show_fc_host_##field, NULL)
1457
1458#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1459 fc_private_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1460static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT
1461 show_fc_host_##field, NULL)
1462
1463#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
ee959b00 1464 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT
1465 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1466 i->private_host_attrs[count].store = NULL; \
1467 i->host_attrs[count] = &i->private_host_attrs[count]; \
1468 count++
1469
1470#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
91ca7b01 1471{ \
ee959b00 1472 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4 1473 i->host_attrs[count] = &i->private_host_attrs[count]; \
91ca7b01
AV
1474 count++; \
1475}
1da177e4
LT
1476
1477
1478/* Fixed Host Attributes */
1479
1480static ssize_t
ee959b00
TJ
1481show_fc_host_supported_classes (struct device *dev,
1482 struct device_attribute *attr, char *buf)
1da177e4 1483{
ee959b00 1484 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT
1485
1486 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1487 return snprintf(buf, 20, "unspecified\n");
1488
1489 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1490}
ee959b00 1491static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1da177e4
LT
1492 show_fc_host_supported_classes, NULL);
1493
1494static ssize_t
ee959b00
TJ
1495show_fc_host_supported_fc4s (struct device *dev,
1496 struct device_attribute *attr, char *buf)
1da177e4 1497{
ee959b00 1498 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT
1499 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1500}
ee959b00 1501static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1da177e4
LT
1502 show_fc_host_supported_fc4s, NULL);
1503
1504static ssize_t
ee959b00
TJ
1505show_fc_host_supported_speeds (struct device *dev,
1506 struct device_attribute *attr, char *buf)
1da177e4 1507{
ee959b00 1508 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT
1509
1510 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1511 return snprintf(buf, 20, "unknown\n");
1512
1513 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1514}
ee959b00 1515static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1da177e4
LT
1516 show_fc_host_supported_speeds, NULL);
1517
1518
1519fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1520fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
6b7281d0
AH
1521fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1522 unsigned long long);
1da177e4 1523fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
a53eb5e0 1524fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1da177e4 1525fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
bb8ef587
NP
1526fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1527fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1528fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1529fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1530fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1531fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1532fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1da177e4
LT
1533
1534
1535/* Dynamic Host Attributes */
1536
1537static ssize_t
ee959b00
TJ
1538show_fc_host_active_fc4s (struct device *dev,
1539 struct device_attribute *attr, char *buf)
1da177e4 1540{
ee959b00 1541 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT
1542 struct fc_internal *i = to_fc_internal(shost->transportt);
1543
1544 if (i->f->get_host_active_fc4s)
1545 i->f->get_host_active_fc4s(shost);
1546
1547 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1548}
ee959b00 1549static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1da177e4
LT
1550 show_fc_host_active_fc4s, NULL);
1551
1552static ssize_t
ee959b00
TJ
1553show_fc_host_speed (struct device *dev,
1554 struct device_attribute *attr, char *buf)
1da177e4 1555{
ee959b00 1556 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT
1557 struct fc_internal *i = to_fc_internal(shost->transportt);
1558
1559 if (i->f->get_host_speed)
1560 i->f->get_host_speed(shost);
1561
1562 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1563 return snprintf(buf, 20, "unknown\n");
1564
1565 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1566}
ee959b00 1567static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1da177e4
LT
1568 show_fc_host_speed, NULL);
1569
1570
1571fc_host_rd_attr(port_id, "0x%06x\n", 20);
1572fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1573fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1574fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
016131b8 1575fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1da177e4 1576
b8d08210
JS
1577fc_private_host_show_function(system_hostname, "%s\n",
1578 FC_SYMBOLIC_NAME_SIZE + 1, )
1579fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
ee959b00 1580static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
b8d08210
JS
1581 show_fc_host_system_hostname, store_fc_host_system_hostname);
1582
1da177e4
LT
1583
1584/* Private Host Attributes */
1585
1586static ssize_t
ee959b00
TJ
1587show_fc_private_host_tgtid_bind_type(struct device *dev,
1588 struct device_attribute *attr, char *buf)
1da177e4 1589{
ee959b00 1590 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT
1591 const char *name;
1592
1593 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1594 if (!name)
1595 return -EINVAL;
1596 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1597}
1598
d16794f6
JSEC
1599#define get_list_head_entry(pos, head, member) \
1600 pos = list_entry((head)->next, typeof(*pos), member)
1601
1da177e4 1602static ssize_t
ee959b00
TJ
1603store_fc_private_host_tgtid_bind_type(struct device *dev,
1604 struct device_attribute *attr, const char *buf, size_t count)
1da177e4 1605{
ee959b00 1606 struct Scsi_Host *shost = transport_class_to_shost(dev);
d16794f6 1607 struct fc_rport *rport;
1da177e4
LT
1608 enum fc_tgtid_binding_type val;
1609 unsigned long flags;
1610
1611 if (get_fc_tgtid_bind_type_match(buf, &val))
1612 return -EINVAL;
1613
1614 /* if changing bind type, purge all unused consistent bindings */
1615 if (val != fc_host_tgtid_bind_type(shost)) {
1616 spin_lock_irqsave(shost->host_lock, flags);
d16794f6
JSEC
1617 while (!list_empty(&fc_host_rport_bindings(shost))) {
1618 get_list_head_entry(rport,
1619 &fc_host_rport_bindings(shost), peers);
aedf3497
JS
1620 list_del(&rport->peers);
1621 rport->port_state = FC_PORTSTATE_DELETED;
1622 fc_queue_work(shost, &rport->rport_delete_work);
d16794f6 1623 }
1da177e4
LT
1624 spin_unlock_irqrestore(shost->host_lock, flags);
1625 }
1626
1627 fc_host_tgtid_bind_type(shost) = val;
1628 return count;
1629}
1630
ee959b00 1631static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1da177e4
LT
1632 show_fc_private_host_tgtid_bind_type,
1633 store_fc_private_host_tgtid_bind_type);
1634
91ca7b01 1635static ssize_t
ee959b00
TJ
1636store_fc_private_host_issue_lip(struct device *dev,
1637 struct device_attribute *attr, const char *buf, size_t count)
91ca7b01 1638{
ee959b00 1639 struct Scsi_Host *shost = transport_class_to_shost(dev);
91ca7b01
AV
1640 struct fc_internal *i = to_fc_internal(shost->transportt);
1641 int ret;
1642
1643 /* ignore any data value written to the attribute */
1644 if (i->f->issue_fc_host_lip) {
1645 ret = i->f->issue_fc_host_lip(shost);
1646 return ret ? ret: count;
1647 }
1648
1649 return -ENOENT;
1650}
1651
ee959b00 1652static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
91ca7b01
AV
1653 store_fc_private_host_issue_lip);
1654
43ca910a
MC
1655static ssize_t
1656store_fc_private_host_dev_loss_tmo(struct device *dev,
1657 struct device_attribute *attr,
1658 const char *buf, size_t count)
1659{
1660 struct Scsi_Host *shost = transport_class_to_shost(dev);
1661 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1662 struct fc_rport *rport;
1663 unsigned long val, flags;
1664 int rc;
1665
1666 rc = fc_str_to_dev_loss(buf, &val);
1667 if (rc)
1668 return rc;
1669
1670 fc_host_dev_loss_tmo(shost) = val;
1671 spin_lock_irqsave(shost->host_lock, flags);
1672 list_for_each_entry(rport, &fc_host->rports, peers)
1673 fc_rport_set_dev_loss_tmo(rport, val);
1674 spin_unlock_irqrestore(shost->host_lock, flags);
1675 return count;
1676}
a53eb5e0 1677
43ca910a
MC
1678fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1679static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1680 show_fc_host_dev_loss_tmo,
1681 store_fc_private_host_dev_loss_tmo);
1682
1683fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
a53eb5e0 1684
1da177e4
LT
1685/*
1686 * Host Statistics Management
1687 */
1688
1689/* Show a given an attribute in the statistics group */
1690static ssize_t
ee959b00 1691fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1da177e4 1692{
ee959b00 1693 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT
1694 struct fc_internal *i = to_fc_internal(shost->transportt);
1695 struct fc_host_statistics *stats;
1696 ssize_t ret = -ENOENT;
1697
1698 if (offset > sizeof(struct fc_host_statistics) ||
1699 offset % sizeof(u64) != 0)
1700 WARN_ON(1);
1701
1702 if (i->f->get_fc_host_stats) {
1703 stats = (i->f->get_fc_host_stats)(shost);
1704 if (stats)
1705 ret = snprintf(buf, 20, "0x%llx\n",
1706 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1707 }
1708 return ret;
1709}
1710
1711
1712/* generate a read-only statistics attribute */
1713#define fc_host_statistic(name) \
ee959b00
TJ
1714static ssize_t show_fcstat_##name(struct device *cd, \
1715 struct device_attribute *attr, \
1716 char *buf) \
1da177e4
LT
1717{ \
1718 return fc_stat_show(cd, buf, \
1719 offsetof(struct fc_host_statistics, name)); \
1720} \
ee959b00 1721static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1da177e4
LT
1722
1723fc_host_statistic(seconds_since_last_reset);
1724fc_host_statistic(tx_frames);
1725fc_host_statistic(tx_words);
1726fc_host_statistic(rx_frames);
1727fc_host_statistic(rx_words);
1728fc_host_statistic(lip_count);
1729fc_host_statistic(nos_count);
1730fc_host_statistic(error_frames);
1731fc_host_statistic(dumped_frames);
1732fc_host_statistic(link_failure_count);
1733fc_host_statistic(loss_of_sync_count);
1734fc_host_statistic(loss_of_signal_count);
1735fc_host_statistic(prim_seq_protocol_err_count);
1736fc_host_statistic(invalid_tx_word_count);
1737fc_host_statistic(invalid_crc_count);
1738fc_host_statistic(fcp_input_requests);
1739fc_host_statistic(fcp_output_requests);
1740fc_host_statistic(fcp_control_requests);
1741fc_host_statistic(fcp_input_megabytes);
1742fc_host_statistic(fcp_output_megabytes);
e58abb0c
VD
1743fc_host_statistic(fcp_packet_alloc_failures);
1744fc_host_statistic(fcp_packet_aborts);
1745fc_host_statistic(fcp_frame_alloc_failures);
1746fc_host_statistic(fc_no_free_exch);
1747fc_host_statistic(fc_no_free_exch_xid);
1748fc_host_statistic(fc_xid_not_found);
1749fc_host_statistic(fc_xid_busy);
1750fc_host_statistic(fc_seq_not_found);
1751fc_host_statistic(fc_non_bls_resp);
1da177e4
LT
1752
1753static ssize_t
ee959b00
TJ
1754fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1755 const char *buf, size_t count)
1da177e4 1756{
ee959b00 1757 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT
1758 struct fc_internal *i = to_fc_internal(shost->transportt);
1759
1760 /* ignore any data value written to the attribute */
1761 if (i->f->reset_fc_host_stats) {
1762 i->f->reset_fc_host_stats(shost);
1763 return count;
1764 }
1765
1766 return -ENOENT;
1767}
ee959b00 1768static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1da177e4
LT
1769 fc_reset_statistics);
1770
1da177e4 1771static struct attribute *fc_statistics_attrs[] = {
ee959b00
TJ
1772 &device_attr_host_seconds_since_last_reset.attr,
1773 &device_attr_host_tx_frames.attr,
1774 &device_attr_host_tx_words.attr,
1775 &device_attr_host_rx_frames.attr,
1776 &device_attr_host_rx_words.attr,
1777 &device_attr_host_lip_count.attr,
1778 &device_attr_host_nos_count.attr,
1779 &device_attr_host_error_frames.attr,
1780 &device_attr_host_dumped_frames.attr,
1781 &device_attr_host_link_failure_count.attr,
1782 &device_attr_host_loss_of_sync_count.attr,
1783 &device_attr_host_loss_of_signal_count.attr,
1784 &device_attr_host_prim_seq_protocol_err_count.attr,
1785 &device_attr_host_invalid_tx_word_count.attr,
1786 &device_attr_host_invalid_crc_count.attr,
1787 &device_attr_host_fcp_input_requests.attr,
1788 &device_attr_host_fcp_output_requests.attr,
1789 &device_attr_host_fcp_control_requests.attr,
1790 &device_attr_host_fcp_input_megabytes.attr,
1791 &device_attr_host_fcp_output_megabytes.attr,
e58abb0c
VD
1792 &device_attr_host_fcp_packet_alloc_failures.attr,
1793 &device_attr_host_fcp_packet_aborts.attr,
1794 &device_attr_host_fcp_frame_alloc_failures.attr,
1795 &device_attr_host_fc_no_free_exch.attr,
1796 &device_attr_host_fc_no_free_exch_xid.attr,
1797 &device_attr_host_fc_xid_not_found.attr,
1798 &device_attr_host_fc_xid_busy.attr,
1799 &device_attr_host_fc_seq_not_found.attr,
1800 &device_attr_host_fc_non_bls_resp.attr,
ee959b00 1801 &device_attr_host_reset_statistics.attr,
1da177e4
LT
1802 NULL
1803};
1804
1805static struct attribute_group fc_statistics_group = {
1806 .name = "statistics",
1807 .attrs = fc_statistics_attrs,
1808};
1809
a53eb5e0
JS
1810
1811/* Host Vport Attributes */
1812
1813static int
1814fc_parse_wwn(const char *ns, u64 *nm)
1815{
1816 unsigned int i, j;
1817 u8 wwn[8];
1818
1819 memset(wwn, 0, sizeof(wwn));
1820
1821 /* Validate and store the new name */
1822 for (i=0, j=0; i < 16; i++) {
ecc30990
AS
1823 int value;
1824
1825 value = hex_to_bin(*ns++);
1826 if (value >= 0)
1827 j = (j << 4) | value;
a53eb5e0
JS
1828 else
1829 return -EINVAL;
1830 if (i % 2) {
1831 wwn[i/2] = j & 0xff;
1832 j = 0;
1833 }
1834 }
1835
1836 *nm = wwn_to_u64(wwn);
1837
1838 return 0;
1839}
1840
1841
1842/*
1843 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1844 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1845 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1846 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1847 */
1848static ssize_t
ee959b00
TJ
1849store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1850 const char *buf, size_t count)
a53eb5e0 1851{
ee959b00 1852 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS
1853 struct fc_vport_identifiers vid;
1854 struct fc_vport *vport;
1855 unsigned int cnt=count;
1856 int stat;
1857
1858 memset(&vid, 0, sizeof(vid));
1859
1860 /* count may include a LF at end of string */
1861 if (buf[cnt-1] == '\n')
1862 cnt--;
1863
1864 /* validate we have enough characters for WWPN */
1865 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1866 return -EINVAL;
1867
1868 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1869 if (stat)
1870 return stat;
1871
1872 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1873 if (stat)
1874 return stat;
1875
1876 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1877 vid.vport_type = FC_PORTTYPE_NPIV;
1878 /* vid.symbolic_name is already zero/NULL's */
1879 vid.disable = false; /* always enabled */
1880
1881 /* we only allow support on Channel 0 !!! */
a30c3f69 1882 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
a53eb5e0
JS
1883 return stat ? stat : count;
1884}
ee959b00 1885static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
a53eb5e0
JS
1886 store_fc_host_vport_create);
1887
1888
1889/*
1890 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1891 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1892 * The WWNs are specified as hex characters, and may *not* contain
1893 * any prefixes (e.g. 0x, x, etc)
1894 */
1895static ssize_t
ee959b00
TJ
1896store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1897 const char *buf, size_t count)
a53eb5e0 1898{
ee959b00 1899 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS
1900 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1901 struct fc_vport *vport;
1902 u64 wwpn, wwnn;
1903 unsigned long flags;
1904 unsigned int cnt=count;
1905 int stat, match;
1906
1907 /* count may include a LF at end of string */
1908 if (buf[cnt-1] == '\n')
1909 cnt--;
1910
1911 /* validate we have enough characters for WWPN */
1912 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1913 return -EINVAL;
1914
1915 stat = fc_parse_wwn(&buf[0], &wwpn);
1916 if (stat)
1917 return stat;
1918
1919 stat = fc_parse_wwn(&buf[17], &wwnn);
1920 if (stat)
1921 return stat;
1922
1923 spin_lock_irqsave(shost->host_lock, flags);
1924 match = 0;
1925 /* we only allow support on Channel 0 !!! */
1926 list_for_each_entry(vport, &fc_host->vports, peers) {
1927 if ((vport->channel == 0) &&
1928 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
0d9dc7c8
GR
1929 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1930 break;
1931 vport->flags |= FC_VPORT_DELETING;
a53eb5e0
JS
1932 match = 1;
1933 break;
1934 }
1935 }
1936 spin_unlock_irqrestore(shost->host_lock, flags);
1937
1938 if (!match)
1939 return -ENODEV;
1940
1941 stat = fc_vport_terminate(vport);
1942 return stat ? stat : count;
1943}
ee959b00 1944static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
a53eb5e0
JS
1945 store_fc_host_vport_delete);
1946
1947
1da177e4
LT
1948static int fc_host_match(struct attribute_container *cont,
1949 struct device *dev)
1950{
1951 struct Scsi_Host *shost;
1952 struct fc_internal *i;
1953
1954 if (!scsi_is_host_device(dev))
1955 return 0;
1956
1957 shost = dev_to_shost(dev);
1958 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1959 != &fc_host_class.class)
1960 return 0;
1961
1962 i = to_fc_internal(shost->transportt);
1963
1964 return &i->t.host_attrs.ac == cont;
1965}
1966
1967static int fc_target_match(struct attribute_container *cont,
1968 struct device *dev)
1969{
1970 struct Scsi_Host *shost;
1971 struct fc_internal *i;
1972
1973 if (!scsi_is_target_device(dev))
1974 return 0;
1975
1976 shost = dev_to_shost(dev->parent);
1977 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1978 != &fc_host_class.class)
1979 return 0;
1980
1981 i = to_fc_internal(shost->transportt);
1982
1983 return &i->t.target_attrs.ac == cont;
1984}
1985
1986static void fc_rport_dev_release(struct device *dev)
1987{
1988 struct fc_rport *rport = dev_to_rport(dev);
1989 put_device(dev->parent);
1990 kfree(rport);
1991}
1992
1993int scsi_is_fc_rport(const struct device *dev)
1994{
1995 return dev->release == fc_rport_dev_release;
1996}
1997EXPORT_SYMBOL(scsi_is_fc_rport);
1998
1999static int fc_rport_match(struct attribute_container *cont,
2000 struct device *dev)
2001{
2002 struct Scsi_Host *shost;
2003 struct fc_internal *i;
2004
2005 if (!scsi_is_fc_rport(dev))
2006 return 0;
2007
2008 shost = dev_to_shost(dev->parent);
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
2015 return &i->rport_attr_cont.ac == cont;
2016}
2017
5c44cd2a 2018
a53eb5e0
JS
2019static void fc_vport_dev_release(struct device *dev)
2020{
2021 struct fc_vport *vport = dev_to_vport(dev);
2022 put_device(dev->parent); /* release kobj parent */
2023 kfree(vport);
2024}
2025
2026int scsi_is_fc_vport(const struct device *dev)
2027{
2028 return dev->release == fc_vport_dev_release;
2029}
2030EXPORT_SYMBOL(scsi_is_fc_vport);
2031
2032static int fc_vport_match(struct attribute_container *cont,
2033 struct device *dev)
2034{
2035 struct fc_vport *vport;
2036 struct Scsi_Host *shost;
2037 struct fc_internal *i;
2038
2039 if (!scsi_is_fc_vport(dev))
2040 return 0;
2041 vport = dev_to_vport(dev);
2042
2043 shost = vport_to_shost(vport);
2044 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2045 != &fc_host_class.class)
2046 return 0;
2047
2048 i = to_fc_internal(shost->transportt);
2049 return &i->vport_attr_cont.ac == cont;
2050}
2051
2052
c829c394
JS
2053/**
2054 * fc_timed_out - FC Transport I/O timeout intercept handler
c829c394
JS
2055 * @scmd: The SCSI command which timed out
2056 *
2057 * This routine protects against error handlers getting invoked while a
2058 * rport is in a blocked state, typically due to a temporarily loss of
2059 * connectivity. If the error handlers are allowed to proceed, requests
2060 * to abort i/o, reset the target, etc will likely fail as there is no way
2061 * to communicate with the device to perform the requested function. These
2062 * failures may result in the midlayer taking the device offline, requiring
2063 * manual intervention to restore operation.
2064 *
2065 * This routine, called whenever an i/o times out, validates the state of
2066 * the underlying rport. If the rport is blocked, it returns
2067 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2068 * Eventually, either the device will return, or devloss_tmo will fire,
2069 * and when the timeout then fires, it will be handled normally.
2070 * If the rport is not blocked, normal error handling continues.
2071 *
2072 * Notes:
2073 * This routine assumes no locks are held on entry.
eb44820c 2074 */
242f9dcb 2075static enum blk_eh_timer_return
c829c394
JS
2076fc_timed_out(struct scsi_cmnd *scmd)
2077{
2078 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2079
2080 if (rport->port_state == FC_PORTSTATE_BLOCKED)
242f9dcb 2081 return BLK_EH_RESET_TIMER;
c829c394 2082
242f9dcb 2083 return BLK_EH_NOT_HANDLED;
c829c394
JS
2084}
2085
5c44cd2a 2086/*
bda23253
JS
2087 * Called by fc_user_scan to locate an rport on the shost that
2088 * matches the channel and target id, and invoke scsi_scan_target()
2089 * on the rport.
5c44cd2a 2090 */
bda23253
JS
2091static void
2092fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
5c44cd2a
JSEC
2093{
2094 struct fc_rport *rport;
bda23253
JS
2095 unsigned long flags;
2096
2097 spin_lock_irqsave(shost->host_lock, flags);
5c44cd2a 2098
e02f3f59
CH
2099 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2100 if (rport->scsi_target_id == -1)
2101 continue;
5c44cd2a 2102
0d2fcd9f
HR
2103 if (rport->port_state != FC_PORTSTATE_ONLINE)
2104 continue;
2105
bda23253
JS
2106 if ((channel == rport->channel) &&
2107 (id == rport->scsi_target_id)) {
2108 spin_unlock_irqrestore(shost->host_lock, flags);
2109 scsi_scan_target(&rport->dev, channel, id, lun, 1);
2110 return;
e02f3f59
CH
2111 }
2112 }
2113
bda23253
JS
2114 spin_unlock_irqrestore(shost->host_lock, flags);
2115}
2116
2117/*
2118 * Called via sysfs scan routines. Necessary, as the FC transport
2119 * wants to place all target objects below the rport object. So this
2120 * routine must invoke the scsi_scan_target() routine with the rport
2121 * object as the parent.
2122 */
2123static int
2124fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2125{
2126 uint chlo, chhi;
2127 uint tgtlo, tgthi;
2128
2129 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2130 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2131 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2132 return -EINVAL;
2133
2134 if (channel == SCAN_WILD_CARD) {
2135 chlo = 0;
2136 chhi = shost->max_channel + 1;
2137 } else {
2138 chlo = channel;
2139 chhi = channel + 1;
2140 }
2141
2142 if (id == SCAN_WILD_CARD) {
2143 tgtlo = 0;
2144 tgthi = shost->max_id;
2145 } else {
2146 tgtlo = id;
2147 tgthi = id + 1;
2148 }
2149
2150 for ( ; chlo < chhi; chlo++)
2151 for ( ; tgtlo < tgthi; tgtlo++)
2152 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2153
e02f3f59 2154 return 0;
5c44cd2a
JSEC
2155}
2156
7525236d
FT
2157static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2158 int result)
2159{
2160 struct fc_internal *i = to_fc_internal(shost->transportt);
2161 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2162}
2163
2164static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2165{
2166 struct fc_internal *i = to_fc_internal(shost->transportt);
2167 return i->f->it_nexus_response(shost, nexus, result);
2168}
2169
1da177e4
LT
2170struct scsi_transport_template *
2171fc_attach_transport(struct fc_function_template *ft)
2172{
1da177e4 2173 int count;
24669f75
JS
2174 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2175 GFP_KERNEL);
1da177e4
LT
2176
2177 if (unlikely(!i))
2178 return NULL;
2179
1da177e4
LT
2180 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2181 i->t.target_attrs.ac.class = &fc_transport_class.class;
2182 i->t.target_attrs.ac.match = fc_target_match;
2183 i->t.target_size = sizeof(struct fc_starget_attrs);
2184 transport_container_register(&i->t.target_attrs);
2185
2186 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2187 i->t.host_attrs.ac.class = &fc_host_class.class;
2188 i->t.host_attrs.ac.match = fc_host_match;
2189 i->t.host_size = sizeof(struct fc_host_attrs);
2190 if (ft->get_fc_host_stats)
2191 i->t.host_attrs.statistics = &fc_statistics_group;
2192 transport_container_register(&i->t.host_attrs);
2193
2194 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2195 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2196 i->rport_attr_cont.ac.match = fc_rport_match;
2197 transport_container_register(&i->rport_attr_cont);
2198
a53eb5e0
JS
2199 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2200 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2201 i->vport_attr_cont.ac.match = fc_vport_match;
2202 transport_container_register(&i->vport_attr_cont);
2203
1da177e4
LT
2204 i->f = ft;
2205
2206 /* Transport uses the shost workq for scsi scanning */
2207 i->t.create_work_queue = 1;
5c44cd2a 2208
c829c394
JS
2209 i->t.eh_timed_out = fc_timed_out;
2210
e02f3f59 2211 i->t.user_scan = fc_user_scan;
9ef3e4a4 2212
7525236d
FT
2213 /* target-mode drivers' functions */
2214 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2215 i->t.it_nexus_response = fc_it_nexus_response;
2216
1da177e4
LT
2217 /*
2218 * Setup SCSI Target Attributes.
2219 */
2220 count = 0;
2221 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2222 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2223 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2224
2225 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2226
2227 i->starget_attrs[count] = NULL;
2228
2229
2230 /*
2231 * Setup SCSI Host Attributes.
2232 */
2233 count=0;
2234 SETUP_HOST_ATTRIBUTE_RD(node_name);
2235 SETUP_HOST_ATTRIBUTE_RD(port_name);
6b7281d0 2236 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1da177e4
LT
2237 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2238 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1da177e4
LT
2239 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2240 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
a53eb5e0
JS
2241 if (ft->vport_create) {
2242 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2243 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2244 }
1da177e4 2245 SETUP_HOST_ATTRIBUTE_RD(serial_number);
bb8ef587
NP
2246 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2247 SETUP_HOST_ATTRIBUTE_RD(model);
2248 SETUP_HOST_ATTRIBUTE_RD(model_description);
2249 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2250 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2251 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2252 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
1da177e4
LT
2253
2254 SETUP_HOST_ATTRIBUTE_RD(port_id);
2255 SETUP_HOST_ATTRIBUTE_RD(port_type);
2256 SETUP_HOST_ATTRIBUTE_RD(port_state);
2257 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2258 SETUP_HOST_ATTRIBUTE_RD(speed);
2259 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
016131b8 2260 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
b8d08210 2261 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
1da177e4
LT
2262
2263 /* Transport-managed attributes */
43ca910a 2264 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
1da177e4 2265 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
91ca7b01
AV
2266 if (ft->issue_fc_host_lip)
2267 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
a53eb5e0
JS
2268 if (ft->vport_create)
2269 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2270 if (ft->vport_delete)
2271 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
1da177e4
LT
2272
2273 BUG_ON(count > FC_HOST_NUM_ATTRS);
2274
2275 i->host_attrs[count] = NULL;
2276
2277 /*
2278 * Setup Remote Port Attributes.
2279 */
2280 count=0;
2281 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2282 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2283 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2284 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2285 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2286 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2287 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2288 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2289 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
fff9d40c 2290 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
1da177e4
LT
2291
2292 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2293
2294 i->rport_attrs[count] = NULL;
2295
a53eb5e0
JS
2296 /*
2297 * Setup Virtual Port Attributes.
2298 */
2299 count=0;
2300 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2301 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2302 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2303 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2304 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2305 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2306 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2307 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2308 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2309
2310 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2311
2312 i->vport_attrs[count] = NULL;
2313
1da177e4
LT
2314 return &i->t;
2315}
2316EXPORT_SYMBOL(fc_attach_transport);
2317
2318void fc_release_transport(struct scsi_transport_template *t)
2319{
2320 struct fc_internal *i = to_fc_internal(t);
2321
2322 transport_container_unregister(&i->t.target_attrs);
2323 transport_container_unregister(&i->t.host_attrs);
2324 transport_container_unregister(&i->rport_attr_cont);
a53eb5e0 2325 transport_container_unregister(&i->vport_attr_cont);
1da177e4
LT
2326
2327 kfree(i);
2328}
2329EXPORT_SYMBOL(fc_release_transport);
2330
aedf3497
JS
2331/**
2332 * fc_queue_work - Queue work to the fc_host workqueue.
2333 * @shost: Pointer to Scsi_Host bound to fc_host.
2334 * @work: Work to queue for execution.
2335 *
2336 * Return value:
a0785edf
JS
2337 * 1 - work queued for execution
2338 * 0 - work is already queued
2339 * -EINVAL - work queue doesn't exist
eb44820c 2340 */
aedf3497
JS
2341static int
2342fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2343{
2344 if (unlikely(!fc_host_work_q(shost))) {
2345 printk(KERN_ERR
2346 "ERROR: FC host '%s' attempted to queue work, "
2347 "when no workqueue created.\n", shost->hostt->name);
2348 dump_stack();
2349
2350 return -EINVAL;
2351 }
2352
2353 return queue_work(fc_host_work_q(shost), work);
2354}
2355
2356/**
2357 * fc_flush_work - Flush a fc_host's workqueue.
2358 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2359 */
aedf3497
JS
2360static void
2361fc_flush_work(struct Scsi_Host *shost)
2362{
2363 if (!fc_host_work_q(shost)) {
2364 printk(KERN_ERR
2365 "ERROR: FC host '%s' attempted to flush work, "
2366 "when no workqueue created.\n", shost->hostt->name);
2367 dump_stack();
2368 return;
2369 }
2370
2371 flush_workqueue(fc_host_work_q(shost));
2372}
2373
2374/**
2375 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2376 * @shost: Pointer to Scsi_Host bound to fc_host.
2377 * @work: Work to queue for execution.
2378 * @delay: jiffies to delay the work queuing
2379 *
2380 * Return value:
0f29b966 2381 * 1 on success / 0 already queued / < 0 for error
eb44820c 2382 */
aedf3497 2383static int
c4028958 2384fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
aedf3497
JS
2385 unsigned long delay)
2386{
2387 if (unlikely(!fc_host_devloss_work_q(shost))) {
2388 printk(KERN_ERR
2389 "ERROR: FC host '%s' attempted to queue work, "
2390 "when no workqueue created.\n", shost->hostt->name);
2391 dump_stack();
2392
2393 return -EINVAL;
2394 }
2395
2396 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2397}
2398
2399/**
2400 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2401 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2402 */
aedf3497
JS
2403static void
2404fc_flush_devloss(struct Scsi_Host *shost)
2405{
2406 if (!fc_host_devloss_work_q(shost)) {
2407 printk(KERN_ERR
2408 "ERROR: FC host '%s' attempted to flush work, "
2409 "when no workqueue created.\n", shost->hostt->name);
2410 dump_stack();
2411 return;
2412 }
2413
2414 flush_workqueue(fc_host_devloss_work_q(shost));
2415}
2416
1da177e4
LT
2417
2418/**
eb44820c
RL
2419 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2420 * @shost: Which &Scsi_Host
1da177e4 2421 *
25985edc 2422 * This routine is expected to be called immediately preceding the
1da177e4
LT
2423 * a driver's call to scsi_remove_host().
2424 *
2425 * WARNING: A driver utilizing the fc_transport, which fails to call
eb44820c 2426 * this routine prior to scsi_remove_host(), will leave dangling
1da177e4
LT
2427 * objects in /sys/class/fc_remote_ports. Access to any of these
2428 * objects can result in a system crash !!!
2429 *
2430 * Notes:
2431 * This routine assumes no locks are held on entry.
eb44820c 2432 */
1da177e4
LT
2433void
2434fc_remove_host(struct Scsi_Host *shost)
2435{
a53eb5e0
JS
2436 struct fc_vport *vport = NULL, *next_vport = NULL;
2437 struct fc_rport *rport = NULL, *next_rport = NULL;
aedf3497
JS
2438 struct workqueue_struct *work_q;
2439 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
a53eb5e0 2440 unsigned long flags;
a53eb5e0
JS
2441
2442 spin_lock_irqsave(shost->host_lock, flags);
2443
2444 /* Remove any vports */
9ef3e4a4
JS
2445 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2446 fc_queue_work(shost, &vport->vport_delete_work);
1da177e4
LT
2447
2448 /* Remove any remote ports */
2449 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS
2450 &fc_host->rports, peers) {
2451 list_del(&rport->peers);
2452 rport->port_state = FC_PORTSTATE_DELETED;
2453 fc_queue_work(shost, &rport->rport_delete_work);
2454 }
2455
1da177e4 2456 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS
2457 &fc_host->rport_bindings, peers) {
2458 list_del(&rport->peers);
2459 rport->port_state = FC_PORTSTATE_DELETED;
2460 fc_queue_work(shost, &rport->rport_delete_work);
2461 }
2462
a53eb5e0
JS
2463 spin_unlock_irqrestore(shost->host_lock, flags);
2464
aedf3497
JS
2465 /* flush all scan work items */
2466 scsi_flush_work(shost);
2467
2468 /* flush all stgt delete, and rport delete work items, then kill it */
2469 if (fc_host->work_q) {
2470 work_q = fc_host->work_q;
2471 fc_host->work_q = NULL;
2472 destroy_workqueue(work_q);
2473 }
2474
2475 /* flush all devloss work items, then kill it */
2476 if (fc_host->devloss_work_q) {
2477 work_q = fc_host->devloss_work_q;
2478 fc_host->devloss_work_q = NULL;
2479 destroy_workqueue(work_q);
2480 }
1da177e4
LT
2481}
2482EXPORT_SYMBOL(fc_remove_host);
2483
fff9d40c
MC
2484static void fc_terminate_rport_io(struct fc_rport *rport)
2485{
2486 struct Scsi_Host *shost = rport_to_shost(rport);
2487 struct fc_internal *i = to_fc_internal(shost->transportt);
2488
2489 /* Involve the LLDD if possible to terminate all io on the rport. */
2490 if (i->f->terminate_rport_io)
2491 i->f->terminate_rport_io(rport);
2492
2493 /*
5d9fb5cc 2494 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
fff9d40c 2495 */
5d9fb5cc 2496 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
fff9d40c 2497}
aedf3497
JS
2498
2499/**
25985edc 2500 * fc_starget_delete - called to delete the scsi descendants of an rport
c4028958 2501 * @work: remote port to be operated on.
eb44820c
RL
2502 *
2503 * Deletes target and all sdevs.
2504 */
19a7b4ae 2505static void
c4028958 2506fc_starget_delete(struct work_struct *work)
19a7b4ae 2507{
c4028958
DH
2508 struct fc_rport *rport =
2509 container_of(work, struct fc_rport, stgt_delete_work);
19a7b4ae 2510
fff9d40c 2511 fc_terminate_rport_io(rport);
19a7b4ae
JSEC
2512 scsi_remove_target(&rport->dev);
2513}
2514
aedf3497
JS
2515
2516/**
2517 * fc_rport_final_delete - finish rport termination and delete it.
c4028958 2518 * @work: remote port to be deleted.
eb44820c 2519 */
aedf3497 2520static void
c4028958 2521fc_rport_final_delete(struct work_struct *work)
aedf3497 2522{
c4028958
DH
2523 struct fc_rport *rport =
2524 container_of(work, struct fc_rport, rport_delete_work);
aedf3497
JS
2525 struct device *dev = &rport->dev;
2526 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2527 struct fc_internal *i = to_fc_internal(shost->transportt);
92740b24 2528 unsigned long flags;
8798a694 2529 int do_callback = 0;
aedf3497 2530
112f661d
NNS
2531 fc_terminate_rport_io(rport);
2532
aedf3497 2533 /*
9ef3e4a4 2534 * if a scan is pending, flush the SCSI Host work_q so that
aedf3497
JS
2535 * that we can reclaim the rport scan work element.
2536 */
2537 if (rport->flags & FC_RPORT_SCAN_PENDING)
2538 scsi_flush_work(shost);
2539
92740b24
JS
2540 /*
2541 * Cancel any outstanding timers. These should really exist
2542 * only when rmmod'ing the LLDD and we're asking for
2543 * immediate termination of the rports
2544 */
2545 spin_lock_irqsave(shost->host_lock, flags);
2546 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2547 spin_unlock_irqrestore(shost->host_lock, flags);
2548 if (!cancel_delayed_work(&rport->fail_io_work))
2549 fc_flush_devloss(shost);
2550 if (!cancel_delayed_work(&rport->dev_loss_work))
2551 fc_flush_devloss(shost);
0353e085 2552 cancel_work_sync(&rport->scan_work);
92740b24
JS
2553 spin_lock_irqsave(shost->host_lock, flags);
2554 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2555 }
2556 spin_unlock_irqrestore(shost->host_lock, flags);
2557
0f29b966
JS
2558 /* Delete SCSI target and sdevs */
2559 if (rport->scsi_target_id != -1)
c4028958 2560 fc_starget_delete(&rport->stgt_delete_work);
92740b24
JS
2561
2562 /*
2563 * Notify the driver that the rport is now dead. The LLDD will
2564 * also guarantee that any communication to the rport is terminated
4be98c0c
JS
2565 *
2566 * Avoid this call if we already called it when we preserved the
2567 * rport for the binding.
92740b24 2568 */
8798a694 2569 spin_lock_irqsave(shost->host_lock, flags);
4be98c0c 2570 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
8798a694
MR
2571 (i->f->dev_loss_tmo_callbk)) {
2572 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2573 do_callback = 1;
2574 }
2575 spin_unlock_irqrestore(shost->host_lock, flags);
2576
2577 if (do_callback)
0f29b966 2578 i->f->dev_loss_tmo_callbk(rport);
0f29b966 2579
9e4f5e29
JS
2580 fc_bsg_remove(rport->rqst_q);
2581
aedf3497
JS
2582 transport_remove_device(dev);
2583 device_del(dev);
2584 transport_destroy_device(dev);
3bdad7bd
JS
2585 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2586 put_device(dev); /* for self-reference */
aedf3497
JS
2587}
2588
2589
1da177e4
LT
2590/**
2591 * fc_rport_create - allocates and creates a remote FC port.
2592 * @shost: scsi host the remote port is connected to.
2593 * @channel: Channel on shost port connected to.
2594 * @ids: The world wide names, fc address, and FC4 port
2595 * roles for the remote port.
2596 *
2597 * Allocates and creates the remoter port structure, including the
2598 * class and sysfs creation.
2599 *
2600 * Notes:
2601 * This routine assumes no locks are held on entry.
eb44820c 2602 */
44818efb 2603static struct fc_rport *
1da177e4
LT
2604fc_rport_create(struct Scsi_Host *shost, int channel,
2605 struct fc_rport_identifiers *ids)
2606{
aedf3497 2607 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT
2608 struct fc_internal *fci = to_fc_internal(shost->transportt);
2609 struct fc_rport *rport;
2610 struct device *dev;
2611 unsigned long flags;
2612 int error;
2613 size_t size;
2614
2615 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
24669f75 2616 rport = kzalloc(size, GFP_KERNEL);
1da177e4 2617 if (unlikely(!rport)) {
cadbd4a5 2618 printk(KERN_ERR "%s: allocation failure\n", __func__);
1da177e4
LT
2619 return NULL;
2620 }
1da177e4
LT
2621
2622 rport->maxframe_size = -1;
2623 rport->supported_classes = FC_COS_UNSPECIFIED;
43ca910a 2624 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
1da177e4
LT
2625 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2626 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2627 rport->port_id = ids->port_id;
2628 rport->roles = ids->roles;
2629 rport->port_state = FC_PORTSTATE_ONLINE;
2630 if (fci->f->dd_fcrport_size)
2631 rport->dd_data = &rport[1];
2632 rport->channel = channel;
0f29b966 2633 rport->fast_io_fail_tmo = -1;
1da177e4 2634
c4028958
DH
2635 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2636 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2637 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2638 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2639 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
1da177e4
LT
2640
2641 spin_lock_irqsave(shost->host_lock, flags);
2642
2643 rport->number = fc_host->next_rport_number++;
a53eb5e0 2644 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
1da177e4
LT
2645 rport->scsi_target_id = fc_host->next_target_id++;
2646 else
2647 rport->scsi_target_id = -1;
aedf3497 2648 list_add_tail(&rport->peers, &fc_host->rports);
3bdad7bd 2649 get_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT
2650
2651 spin_unlock_irqrestore(shost->host_lock, flags);
2652
2653 dev = &rport->dev;
3bdad7bd
JS
2654 device_initialize(dev); /* takes self reference */
2655 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
1da177e4 2656 dev->release = fc_rport_dev_release;
71610f55
KS
2657 dev_set_name(dev, "rport-%d:%d-%d",
2658 shost->host_no, channel, rport->number);
1da177e4
LT
2659 transport_setup_device(dev);
2660
2661 error = device_add(dev);
2662 if (error) {
2663 printk(KERN_ERR "FC Remote Port device_add failed\n");
2664 goto delete_rport;
2665 }
2666 transport_add_device(dev);
2667 transport_configure_device(dev);
2668
9e4f5e29
JS
2669 fc_bsg_rportadd(shost, rport);
2670 /* ignore any bsg add error - we just can't do sgio */
2671
a53eb5e0 2672 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
1da177e4 2673 /* initiate a scan of the target */
aedf3497 2674 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2675 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2676 }
1da177e4
LT
2677
2678 return rport;
2679
2680delete_rport:
2681 transport_destroy_device(dev);
1da177e4
LT
2682 spin_lock_irqsave(shost->host_lock, flags);
2683 list_del(&rport->peers);
3bdad7bd 2684 put_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT
2685 spin_unlock_irqrestore(shost->host_lock, flags);
2686 put_device(dev->parent);
2687 kfree(rport);
2688 return NULL;
2689}
2690
2691/**
eb44820c 2692 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
1da177e4
LT
2693 * @shost: scsi host the remote port is connected to.
2694 * @channel: Channel on shost port connected to.
2695 * @ids: The world wide names, fc address, and FC4 port
2696 * roles for the remote port.
2697 *
2698 * The LLDD calls this routine to notify the transport of the existence
2699 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2700 * of the port, it's FC address (port_id), and the FC4 roles that are
2701 * active for the port.
2702 *
2703 * For ports that are FCP targets (aka scsi targets), the FC transport
2704 * maintains consistent target id bindings on behalf of the LLDD.
2705 * A consistent target id binding is an assignment of a target id to
2706 * a remote port identifier, which persists while the scsi host is
2707 * attached. The remote port can disappear, then later reappear, and
2708 * it's target id assignment remains the same. This allows for shifts
2709 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2710 * changes to the scsi subsystem which is based on scsi host number and
2711 * target id values. Bindings are only valid during the attachment of
2712 * the scsi host. If the host detaches, then later re-attaches, target
2713 * id bindings may change.
2714 *
2715 * This routine is responsible for returning a remote port structure.
2716 * The routine will search the list of remote ports it maintains
2717 * internally on behalf of consistent target id mappings. If found, the
2718 * remote port structure will be reused. Otherwise, a new remote port
2719 * structure will be allocated.
2720 *
2721 * Whenever a remote port is allocated, a new fc_remote_port class
2722 * device is created.
2723 *
2724 * Should not be called from interrupt context.
2725 *
2726 * Notes:
2727 * This routine assumes no locks are held on entry.
eb44820c 2728 */
1da177e4
LT
2729struct fc_rport *
2730fc_remote_port_add(struct Scsi_Host *shost, int channel,
2731 struct fc_rport_identifiers *ids)
2732{
19a7b4ae 2733 struct fc_internal *fci = to_fc_internal(shost->transportt);
aedf3497 2734 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT
2735 struct fc_rport *rport;
2736 unsigned long flags;
2737 int match = 0;
2738
aedf3497
JS
2739 /* ensure any stgt delete functions are done */
2740 fc_flush_work(shost);
2741
19a7b4ae
JSEC
2742 /*
2743 * Search the list of "active" rports, for an rport that has been
2744 * deleted, but we've held off the real delete while the target
2745 * is in a "blocked" state.
2746 */
2747 spin_lock_irqsave(shost->host_lock, flags);
2748
aedf3497 2749 list_for_each_entry(rport, &fc_host->rports, peers) {
19a7b4ae
JSEC
2750
2751 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2752 (rport->channel == channel)) {
2753
aedf3497 2754 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC
2755 case FC_TGTID_BIND_BY_WWPN:
2756 case FC_TGTID_BIND_NONE:
2757 if (rport->port_name == ids->port_name)
2758 match = 1;
2759 break;
2760 case FC_TGTID_BIND_BY_WWNN:
2761 if (rport->node_name == ids->node_name)
2762 match = 1;
2763 break;
2764 case FC_TGTID_BIND_BY_ID:
2765 if (rport->port_id == ids->port_id)
2766 match = 1;
2767 break;
2768 }
2769
2770 if (match) {
19a7b4ae
JSEC
2771
2772 memcpy(&rport->node_name, &ids->node_name,
2773 sizeof(rport->node_name));
2774 memcpy(&rport->port_name, &ids->port_name,
2775 sizeof(rport->port_name));
2776 rport->port_id = ids->port_id;
2777
2778 rport->port_state = FC_PORTSTATE_ONLINE;
2779 rport->roles = ids->roles;
2780
2781 spin_unlock_irqrestore(shost->host_lock, flags);
2782
2783 if (fci->f->dd_fcrport_size)
2784 memset(rport->dd_data, 0,
2785 fci->f->dd_fcrport_size);
2786
2787 /*
92740b24
JS
2788 * If we were not a target, cancel the
2789 * io terminate and rport timers, and
2790 * we're done.
2791 *
2792 * If we were a target, but our new role
2793 * doesn't indicate a target, leave the
2794 * timers running expecting the role to
2795 * change as the target fully logs in. If
2796 * it doesn't, the target will be torn down.
2797 *
2798 * If we were a target, and our role shows
2799 * we're still a target, cancel the timers
2800 * and kick off a scan.
19a7b4ae 2801 */
19a7b4ae 2802
92740b24
JS
2803 /* was a target, not in roles */
2804 if ((rport->scsi_target_id != -1) &&
a53eb5e0 2805 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
92740b24 2806 return rport;
19a7b4ae
JSEC
2807
2808 /*
92740b24
JS
2809 * Stop the fail io and dev_loss timers.
2810 * If they flush, the port_state will
2811 * be checked and will NOOP the function.
19a7b4ae 2812 */
0f29b966
JS
2813 if (!cancel_delayed_work(&rport->fail_io_work))
2814 fc_flush_devloss(shost);
92740b24 2815 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS
2816 fc_flush_devloss(shost);
2817
2818 spin_lock_irqsave(shost->host_lock, flags);
2819
fff9d40c 2820 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
4be98c0c
JS
2821 FC_RPORT_DEVLOSS_PENDING |
2822 FC_RPORT_DEVLOSS_CALLBK_DONE);
19a7b4ae 2823
8fb2ef89
MC
2824 spin_unlock_irqrestore(shost->host_lock, flags);
2825
92740b24
JS
2826 /* if target, initiate a scan */
2827 if (rport->scsi_target_id != -1) {
5d9fb5cc
MC
2828 scsi_target_unblock(&rport->dev,
2829 SDEV_RUNNING);
8fb2ef89
MC
2830 spin_lock_irqsave(shost->host_lock,
2831 flags);
92740b24
JS
2832 rport->flags |= FC_RPORT_SCAN_PENDING;
2833 scsi_queue_work(shost,
2834 &rport->scan_work);
2835 spin_unlock_irqrestore(shost->host_lock,
2836 flags);
8fb2ef89 2837 }
a0785edf 2838
9e4f5e29
JS
2839 fc_bsg_goose_queue(rport);
2840
19a7b4ae
JSEC
2841 return rport;
2842 }
2843 }
2844 }
2845
92740b24
JS
2846 /*
2847 * Search the bindings array
2848 * Note: if never a FCP target, you won't be on this list
2849 */
aedf3497 2850 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
1da177e4
LT
2851
2852 /* search for a matching consistent binding */
2853
aedf3497 2854 list_for_each_entry(rport, &fc_host->rport_bindings,
1da177e4
LT
2855 peers) {
2856 if (rport->channel != channel)
2857 continue;
2858
aedf3497 2859 switch (fc_host->tgtid_bind_type) {
1da177e4
LT
2860 case FC_TGTID_BIND_BY_WWPN:
2861 if (rport->port_name == ids->port_name)
2862 match = 1;
2863 break;
2864 case FC_TGTID_BIND_BY_WWNN:
2865 if (rport->node_name == ids->node_name)
2866 match = 1;
2867 break;
2868 case FC_TGTID_BIND_BY_ID:
2869 if (rport->port_id == ids->port_id)
2870 match = 1;
2871 break;
2872 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2873 break;
2874 }
2875
2876 if (match) {
aedf3497 2877 list_move_tail(&rport->peers, &fc_host->rports);
1da177e4
LT
2878 break;
2879 }
2880 }
2881
1da177e4
LT
2882 if (match) {
2883 memcpy(&rport->node_name, &ids->node_name,
2884 sizeof(rport->node_name));
2885 memcpy(&rport->port_name, &ids->port_name,
2886 sizeof(rport->port_name));
2887 rport->port_id = ids->port_id;
2888 rport->roles = ids->roles;
2889 rport->port_state = FC_PORTSTATE_ONLINE;
fff9d40c 2890 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 2891
19a7b4ae
JSEC
2892 if (fci->f->dd_fcrport_size)
2893 memset(rport->dd_data, 0,
2894 fci->f->dd_fcrport_size);
8fb2ef89
MC
2895 spin_unlock_irqrestore(shost->host_lock, flags);
2896
2897 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
5d9fb5cc 2898 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
19a7b4ae 2899
1da177e4 2900 /* initiate a scan of the target */
8fb2ef89 2901 spin_lock_irqsave(shost->host_lock, flags);
aedf3497 2902 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2903 scsi_queue_work(shost, &rport->scan_work);
a0785edf 2904 spin_unlock_irqrestore(shost->host_lock, flags);
8fb2ef89 2905 }
1da177e4
LT
2906 return rport;
2907 }
2908 }
2909
19a7b4ae
JSEC
2910 spin_unlock_irqrestore(shost->host_lock, flags);
2911
1da177e4
LT
2912 /* No consistent binding found - create new remote port entry */
2913 rport = fc_rport_create(shost, channel, ids);
2914
2915 return rport;
2916}
2917EXPORT_SYMBOL(fc_remote_port_add);
2918
1da177e4
LT
2919
2920/**
eb44820c 2921 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
1da177e4
LT
2922 * @rport: The remote port that no longer exists
2923 *
2924 * The LLDD calls this routine to notify the transport that a remote
2925 * port is no longer part of the topology. Note: Although a port
2926 * may no longer be part of the topology, it may persist in the remote
19a7b4ae 2927 * ports displayed by the fc_host. We do this under 2 conditions:
eb44820c 2928 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
19a7b4ae
JSEC
2929 * This allows the port to temporarily disappear, then reappear without
2930 * disrupting the SCSI device tree attached to it. During the "blocked"
2931 * period the port will still exist.
eb44820c 2932 * 2) If the port was a scsi target and disappears for longer than we
19a7b4ae
JSEC
2933 * expect, we'll delete the port and the tear down the SCSI device tree
2934 * attached to it. However, we want to semi-persist the target id assigned
2935 * to that port if it eventually does exist. The port structure will
2936 * remain (although with minimal information) so that the target id
2937 * bindings remails.
1da177e4
LT
2938 *
2939 * If the remote port is not an FCP Target, it will be fully torn down
2940 * and deallocated, including the fc_remote_port class device.
2941 *
19a7b4ae
JSEC
2942 * If the remote port is an FCP Target, the port will be placed in a
2943 * temporary blocked state. From the LLDD's perspective, the rport no
2944 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2945 * exists, but all sdevs on it are blocked from further I/O. The following
eb44820c
RL
2946 * is then expected.
2947 *
19a7b4ae
JSEC
2948 * If the remote port does not return (signaled by a LLDD call to
2949 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2950 * scsi target is removed - killing all outstanding i/o and removing the
2951 * scsi devices attached ot it. The port structure will be marked Not
2952 * Present and be partially cleared, leaving only enough information to
2953 * recognize the remote port relative to the scsi target id binding if
2954 * it later appears. The port will remain as long as there is a valid
2955 * binding (e.g. until the user changes the binding type or unloads the
2956 * scsi host with the binding).
1da177e4 2957 *
19a7b4ae
JSEC
2958 * If the remote port returns within the dev_loss_tmo value (and matches
2959 * according to the target id binding type), the port structure will be
2960 * reused. If it is no longer a SCSI target, the target will be torn
2961 * down. If it continues to be a SCSI target, then the target will be
2962 * unblocked (allowing i/o to be resumed), and a scan will be activated
2963 * to ensure that all luns are detected.
2964 *
2965 * Called from normal process context only - cannot be called from interrupt.
1da177e4
LT
2966 *
2967 * Notes:
2968 * This routine assumes no locks are held on entry.
eb44820c 2969 */
1da177e4
LT
2970void
2971fc_remote_port_delete(struct fc_rport *rport)
2972{
aedf3497 2973 struct Scsi_Host *shost = rport_to_shost(rport);
36dd288f 2974 unsigned long timeout = rport->dev_loss_tmo;
aedf3497
JS
2975 unsigned long flags;
2976
2977 /*
2978 * No need to flush the fc_host work_q's, as all adds are synchronous.
2979 *
2980 * We do need to reclaim the rport scan work element, so eventually
2981 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2982 * there's still a scan pending.
2983 */
2984
2985 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2986
92740b24 2987 if (rport->port_state != FC_PORTSTATE_ONLINE) {
aedf3497 2988 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT
2989 return;
2990 }
2991
92740b24
JS
2992 /*
2993 * In the past, we if this was not an FCP-Target, we would
2994 * unconditionally just jump to deleting the rport.
2995 * However, rports can be used as node containers by the LLDD,
2996 * and its not appropriate to just terminate the rport at the
2997 * first sign of a loss in connectivity. The LLDD may want to
2998 * send ELS traffic to re-validate the login. If the rport is
2999 * immediately deleted, it makes it inappropriate for a node
3000 * container.
3001 * So... we now unconditionally wait dev_loss_tmo before
3002 * destroying an rport.
3003 */
3004
aedf3497
JS
3005 rport->port_state = FC_PORTSTATE_BLOCKED;
3006
3007 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3008
3009 spin_unlock_irqrestore(shost->host_lock, flags);
3010
7525236d
FT
3011 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
3012 shost->active_mode & MODE_TARGET)
3013 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
3014
19a7b4ae 3015 scsi_target_block(&rport->dev);
1da177e4 3016
0f29b966
JS
3017 /* see if we need to kill io faster than waiting for device loss */
3018 if ((rport->fast_io_fail_tmo != -1) &&
fff9d40c 3019 (rport->fast_io_fail_tmo < timeout))
0f29b966
JS
3020 fc_queue_devloss_work(shost, &rport->fail_io_work,
3021 rport->fast_io_fail_tmo * HZ);
3022
19a7b4ae 3023 /* cap the length the devices can be blocked until they are deleted */
aedf3497 3024 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
1da177e4
LT
3025}
3026EXPORT_SYMBOL(fc_remote_port_delete);
3027
3028/**
eb44820c 3029 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
1da177e4 3030 * @rport: The remote port that changed.
eb44820c 3031 * @roles: New roles for this port.
1da177e4 3032 *
eb44820c
RL
3033 * Description: The LLDD calls this routine to notify the transport that the
3034 * roles on a remote port may have changed. The largest effect of this is
1da177e4
LT
3035 * if a port now becomes a FCP Target, it must be allocated a
3036 * scsi target id. If the port is no longer a FCP target, any
3037 * scsi target id value assigned to it will persist in case the
3038 * role changes back to include FCP Target. No changes in the scsi
3039 * midlayer will be invoked if the role changes (in the expectation
3040 * that the role will be resumed. If it doesn't normal error processing
3041 * will take place).
3042 *
3043 * Should not be called from interrupt context.
3044 *
3045 * Notes:
3046 * This routine assumes no locks are held on entry.
eb44820c 3047 */
1da177e4
LT
3048void
3049fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3050{
3051 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 3052 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT
3053 unsigned long flags;
3054 int create = 0;
7525236d 3055 int ret;
1da177e4 3056
1da177e4 3057 spin_lock_irqsave(shost->host_lock, flags);
a53eb5e0 3058 if (roles & FC_PORT_ROLE_FCP_TARGET) {
19a7b4ae
JSEC
3059 if (rport->scsi_target_id == -1) {
3060 rport->scsi_target_id = fc_host->next_target_id++;
3061 create = 1;
a53eb5e0 3062 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
19a7b4ae 3063 create = 1;
7525236d
FT
3064 } else if (shost->active_mode & MODE_TARGET) {
3065 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
3066 (char *)&rport->node_name);
3067 if (ret)
3068 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
3069 ret);
1da177e4 3070 }
1da177e4 3071
19a7b4ae
JSEC
3072 rport->roles = roles;
3073
aedf3497
JS
3074 spin_unlock_irqrestore(shost->host_lock, flags);
3075
19a7b4ae
JSEC
3076 if (create) {
3077 /*
3078 * There may have been a delete timer running on the
3079 * port. Ensure that it is cancelled as we now know
3080 * the port is an FCP Target.
3081 * Note: we know the rport is exists and in an online
3082 * state as the LLDD would not have had an rport
3083 * reference to pass us.
3084 *
3085 * Take no action on the del_timer failure as the state
3086 * machine state change will validate the
3087 * transaction.
3088 */
0f29b966
JS
3089 if (!cancel_delayed_work(&rport->fail_io_work))
3090 fc_flush_devloss(shost);
19a7b4ae 3091 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS
3092 fc_flush_devloss(shost);
3093
3094 spin_lock_irqsave(shost->host_lock, flags);
fff9d40c 3095 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
0eecee41
JS
3096 FC_RPORT_DEVLOSS_PENDING |
3097 FC_RPORT_DEVLOSS_CALLBK_DONE);
aedf3497
JS
3098 spin_unlock_irqrestore(shost->host_lock, flags);
3099
3100 /* ensure any stgt delete functions are done */
3101 fc_flush_work(shost);
19a7b4ae 3102
5d9fb5cc 3103 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
1da177e4 3104 /* initiate a scan of the target */
aedf3497
JS
3105 spin_lock_irqsave(shost->host_lock, flags);
3106 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 3107 scsi_queue_work(shost, &rport->scan_work);
aedf3497 3108 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae 3109 }
1da177e4
LT
3110}
3111EXPORT_SYMBOL(fc_remote_port_rolechg);
3112
3113/**
eb44820c 3114 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
92740b24 3115 * @work: rport target that failed to reappear in the allotted time.
eb44820c
RL
3116 *
3117 * Description: An attempt to delete a remote port blocks, and if it fails
3118 * to return in the allotted time this gets called.
3119 */
1da177e4 3120static void
c4028958 3121fc_timeout_deleted_rport(struct work_struct *work)
1da177e4 3122{
c4028958
DH
3123 struct fc_rport *rport =
3124 container_of(work, struct fc_rport, dev_loss_work.work);
19a7b4ae 3125 struct Scsi_Host *shost = rport_to_shost(rport);
4be98c0c 3126 struct fc_internal *i = to_fc_internal(shost->transportt);
aedf3497 3127 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
19a7b4ae 3128 unsigned long flags;
8798a694 3129 int do_callback = 0;
1da177e4 3130
19a7b4ae 3131 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 3132
aedf3497
JS
3133 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3134
1da177e4 3135 /*
92740b24
JS
3136 * If the port is ONLINE, then it came back. If it was a SCSI
3137 * target, validate it still is. If not, tear down the
3138 * scsi_target on it.
1da177e4 3139 */
aedf3497 3140 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
92740b24 3141 (rport->scsi_target_id != -1) &&
a53eb5e0 3142 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
19a7b4ae 3143 dev_printk(KERN_ERR, &rport->dev,
aedf3497
JS
3144 "blocked FC remote port time out: no longer"
3145 " a FCP target, removing starget\n");
aedf3497 3146 spin_unlock_irqrestore(shost->host_lock, flags);
5d9fb5cc 3147 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
a0785edf 3148 fc_queue_work(shost, &rport->stgt_delete_work);
19a7b4ae
JSEC
3149 return;
3150 }
1da177e4 3151
92740b24 3152 /* NOOP state - we're flushing workq's */
19a7b4ae
JSEC
3153 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3154 spin_unlock_irqrestore(shost->host_lock, flags);
3155 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS
3156 "blocked FC remote port time out: leaving"
3157 " rport%s alone\n",
3158 (rport->scsi_target_id != -1) ? " and starget" : "");
19a7b4ae
JSEC
3159 return;
3160 }
1da177e4 3161
92740b24
JS
3162 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3163 (rport->scsi_target_id == -1)) {
aedf3497
JS
3164 list_del(&rport->peers);
3165 rport->port_state = FC_PORTSTATE_DELETED;
19a7b4ae 3166 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS
3167 "blocked FC remote port time out: removing"
3168 " rport%s\n",
3169 (rport->scsi_target_id != -1) ? " and starget" : "");
aedf3497
JS
3170 fc_queue_work(shost, &rport->rport_delete_work);
3171 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC
3172 return;
3173 }
1da177e4 3174
19a7b4ae
JSEC
3175 dev_printk(KERN_ERR, &rport->dev,
3176 "blocked FC remote port time out: removing target and "
3177 "saving binding\n");
3178
aedf3497 3179 list_move_tail(&rport->peers, &fc_host->rport_bindings);
1da177e4
LT
3180
3181 /*
19a7b4ae
JSEC
3182 * Note: We do not remove or clear the hostdata area. This allows
3183 * host-specific target data to persist along with the
3184 * scsi_target_id. It's up to the host to manage it's hostdata area.
1da177e4 3185 */
1da177e4 3186
19a7b4ae
JSEC
3187 /*
3188 * Reinitialize port attributes that may change if the port comes back.
3189 */
3190 rport->maxframe_size = -1;
3191 rport->supported_classes = FC_COS_UNSPECIFIED;
a53eb5e0 3192 rport->roles = FC_PORT_ROLE_UNKNOWN;
aedf3497 3193 rport->port_state = FC_PORTSTATE_NOTPRESENT;
fff9d40c 3194 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 3195
f78badb1
JS
3196 /*
3197 * Pre-emptively kill I/O rather than waiting for the work queue
3198 * item to teardown the starget. (FCOE libFC folks prefer this
3199 * and to have the rport_port_id still set when it's done).
3200 */
3201 spin_unlock_irqrestore(shost->host_lock, flags);
3202 fc_terminate_rport_io(rport);
3203
8798a694
MR
3204 spin_lock_irqsave(shost->host_lock, flags);
3205
3206 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
f78badb1 3207
8798a694
MR
3208 /* remove the identifiers that aren't used in the consisting binding */
3209 switch (fc_host->tgtid_bind_type) {
3210 case FC_TGTID_BIND_BY_WWPN:
3211 rport->node_name = -1;
3212 rport->port_id = -1;
3213 break;
3214 case FC_TGTID_BIND_BY_WWNN:
3215 rport->port_name = -1;
3216 rport->port_id = -1;
3217 break;
3218 case FC_TGTID_BIND_BY_ID:
3219 rport->node_name = -1;
3220 rport->port_name = -1;
3221 break;
3222 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3223 break;
3224 }
3225
3226 /*
3227 * As this only occurs if the remote port (scsi target)
3228 * went away and didn't come back - we'll remove
3229 * all attached scsi devices.
3230 */
3231 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3232 fc_queue_work(shost, &rport->stgt_delete_work);
3233
3234 do_callback = 1;
19a7b4ae
JSEC
3235 }
3236
8798a694 3237 spin_unlock_irqrestore(shost->host_lock, flags);
4be98c0c
JS
3238
3239 /*
3240 * Notify the driver that the rport is now dead. The LLDD will
3241 * also guarantee that any communication to the rport is terminated
3242 *
3243 * Note: we set the CALLBK_DONE flag above to correspond
3244 */
8798a694 3245 if (do_callback && i->f->dev_loss_tmo_callbk)
4be98c0c 3246 i->f->dev_loss_tmo_callbk(rport);
1da177e4 3247}
1da177e4 3248
4be98c0c 3249
0f29b966 3250/**
eb44820c 3251 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
c4028958 3252 * @work: rport to terminate io on.
0f29b966
JS
3253 *
3254 * Notes: Only requests the failure of the io, not that all are flushed
3255 * prior to returning.
eb44820c 3256 */
0f29b966 3257static void
c4028958 3258fc_timeout_fail_rport_io(struct work_struct *work)
0f29b966 3259{
c4028958
DH
3260 struct fc_rport *rport =
3261 container_of(work, struct fc_rport, fail_io_work.work);
0f29b966
JS
3262
3263 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3264 return;
3265
fff9d40c
MC
3266 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3267 fc_terminate_rport_io(rport);
0f29b966
JS
3268}
3269
1da177e4
LT
3270/**
3271 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
c4028958 3272 * @work: remote port to be scanned.
eb44820c 3273 */
1da177e4 3274static void
c4028958 3275fc_scsi_scan_rport(struct work_struct *work)
1da177e4 3276{
c4028958
DH
3277 struct fc_rport *rport =
3278 container_of(work, struct fc_rport, scan_work);
aedf3497 3279 struct Scsi_Host *shost = rport_to_shost(rport);
03f002f7 3280 struct fc_internal *i = to_fc_internal(shost->transportt);
42e33148
JSEC
3281 unsigned long flags;
3282
aedf3497 3283 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
03f002f7
CS
3284 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3285 !(i->f->disable_target_scan)) {
aedf3497
JS
3286 scsi_scan_target(&rport->dev, rport->channel,
3287 rport->scsi_target_id, SCAN_WILD_CARD, 1);
42e33148 3288 }
aedf3497
JS
3289
3290 spin_lock_irqsave(shost->host_lock, flags);
3291 rport->flags &= ~FC_RPORT_SCAN_PENDING;
42e33148
JSEC
3292 spin_unlock_irqrestore(shost->host_lock, flags);
3293}
3294
65d430fa
CS
3295/**
3296 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3297 * @cmnd: SCSI command that scsi_eh is trying to recover
3298 *
3299 * This routine can be called from a FC LLD scsi_eh callback. It
3300 * blocks the scsi_eh thread until the fc_rport leaves the
2f2eb587
CS
3301 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3302 * necessary to avoid the scsi_eh failing recovery actions for blocked
3303 * rports which would lead to offlined SCSI devices.
3304 *
3305 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3306 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3307 * passed back to scsi_eh.
65d430fa 3308 */
2f2eb587 3309int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
65d430fa
CS
3310{
3311 struct Scsi_Host *shost = cmnd->device->host;
3312 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3313 unsigned long flags;
3314
3315 spin_lock_irqsave(shost->host_lock, flags);
2f2eb587
CS
3316 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3317 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
65d430fa
CS
3318 spin_unlock_irqrestore(shost->host_lock, flags);
3319 msleep(1000);
3320 spin_lock_irqsave(shost->host_lock, flags);
3321 }
3322 spin_unlock_irqrestore(shost->host_lock, flags);
2f2eb587
CS
3323
3324 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3325 return FAST_IO_FAIL;
3326
3327 return 0;
65d430fa
CS
3328}
3329EXPORT_SYMBOL(fc_block_scsi_eh);
42e33148 3330
a53eb5e0 3331/**
a30c3f69 3332 * fc_vport_setup - allocates and creates a FC virtual port.
a53eb5e0
JS
3333 * @shost: scsi host the virtual port is connected to.
3334 * @channel: Channel on shost port connected to.
3335 * @pdev: parent device for vport
3336 * @ids: The world wide names, FC4 port roles, etc for
3337 * the virtual port.
3338 * @ret_vport: The pointer to the created vport.
3339 *
3340 * Allocates and creates the vport structure, calls the parent host
3341 * to instantiate the vport, the completes w/ class and sysfs creation.
3342 *
3343 * Notes:
3344 * This routine assumes no locks are held on entry.
eb44820c 3345 */
a53eb5e0 3346static int
a30c3f69 3347fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
a53eb5e0
JS
3348 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3349{
3350 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3351 struct fc_internal *fci = to_fc_internal(shost->transportt);
3352 struct fc_vport *vport;
3353 struct device *dev;
3354 unsigned long flags;
3355 size_t size;
3356 int error;
3357
3358 *ret_vport = NULL;
3359
3360 if ( ! fci->f->vport_create)
3361 return -ENOENT;
3362
3363 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3364 vport = kzalloc(size, GFP_KERNEL);
3365 if (unlikely(!vport)) {
cadbd4a5 3366 printk(KERN_ERR "%s: allocation failure\n", __func__);
a53eb5e0
JS
3367 return -ENOMEM;
3368 }
3369
3370 vport->vport_state = FC_VPORT_UNKNOWN;
3371 vport->vport_last_state = FC_VPORT_UNKNOWN;
3372 vport->node_name = ids->node_name;
3373 vport->port_name = ids->port_name;
3374 vport->roles = ids->roles;
3375 vport->vport_type = ids->vport_type;
3376 if (fci->f->dd_fcvport_size)
3377 vport->dd_data = &vport[1];
3378 vport->shost = shost;
3379 vport->channel = channel;
3380 vport->flags = FC_VPORT_CREATING;
9ef3e4a4 3381 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
a53eb5e0
JS
3382
3383 spin_lock_irqsave(shost->host_lock, flags);
3384
3385 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3386 spin_unlock_irqrestore(shost->host_lock, flags);
3387 kfree(vport);
3388 return -ENOSPC;
3389 }
3390 fc_host->npiv_vports_inuse++;
3391 vport->number = fc_host->next_vport_number++;
3392 list_add_tail(&vport->peers, &fc_host->vports);
3393 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3394
3395 spin_unlock_irqrestore(shost->host_lock, flags);
3396
3397 dev = &vport->dev;
3398 device_initialize(dev); /* takes self reference */
3399 dev->parent = get_device(pdev); /* takes parent reference */
3400 dev->release = fc_vport_dev_release;
71610f55
KS
3401 dev_set_name(dev, "vport-%d:%d-%d",
3402 shost->host_no, channel, vport->number);
a53eb5e0
JS
3403 transport_setup_device(dev);
3404
3405 error = device_add(dev);
3406 if (error) {
3407 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3408 goto delete_vport;
3409 }
3410 transport_add_device(dev);
3411 transport_configure_device(dev);
3412
3413 error = fci->f->vport_create(vport, ids->disable);
3414 if (error) {
3415 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3416 goto delete_vport_all;
3417 }
3418
3419 /*
3420 * if the parent isn't the physical adapter's Scsi_Host, ensure
3421 * the Scsi_Host at least contains ia symlink to the vport.
3422 */
3423 if (pdev != &shost->shost_gendev) {
3424 error = sysfs_create_link(&shost->shost_gendev.kobj,
71610f55 3425 &dev->kobj, dev_name(dev));
a53eb5e0
JS
3426 if (error)
3427 printk(KERN_ERR
3428 "%s: Cannot create vport symlinks for "
3429 "%s, err=%d\n",
71610f55 3430 __func__, dev_name(dev), error);
a53eb5e0
JS
3431 }
3432 spin_lock_irqsave(shost->host_lock, flags);
3433 vport->flags &= ~FC_VPORT_CREATING;
3434 spin_unlock_irqrestore(shost->host_lock, flags);
3435
3436 dev_printk(KERN_NOTICE, pdev,
71610f55 3437 "%s created via shost%d channel %d\n", dev_name(dev),
a53eb5e0
JS
3438 shost->host_no, channel);
3439
3440 *ret_vport = vport;
3441
3442 return 0;
3443
3444delete_vport_all:
3445 transport_remove_device(dev);
3446 device_del(dev);
3447delete_vport:
3448 transport_destroy_device(dev);
3449 spin_lock_irqsave(shost->host_lock, flags);
3450 list_del(&vport->peers);
3451 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3452 fc_host->npiv_vports_inuse--;
3453 spin_unlock_irqrestore(shost->host_lock, flags);
3454 put_device(dev->parent);
3455 kfree(vport);
3456
3457 return error;
3458}
3459
a30c3f69
AV
3460/**
3461 * fc_vport_create - Admin App or LLDD requests creation of a vport
3462 * @shost: scsi host the virtual port is connected to.
3463 * @channel: channel on shost port connected to.
3464 * @ids: The world wide names, FC4 port roles, etc for
3465 * the virtual port.
3466 *
3467 * Notes:
3468 * This routine assumes no locks are held on entry.
3469 */
3470struct fc_vport *
3471fc_vport_create(struct Scsi_Host *shost, int channel,
3472 struct fc_vport_identifiers *ids)
3473{
3474 int stat;
3475 struct fc_vport *vport;
3476
3477 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3478 ids, &vport);
3479 return stat ? NULL : vport;
3480}
3481EXPORT_SYMBOL(fc_vport_create);
a53eb5e0
JS
3482
3483/**
3484 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3485 * @vport: fc_vport to be terminated
3486 *
3487 * Calls the LLDD vport_delete() function, then deallocates and removes
3488 * the vport from the shost and object tree.
3489 *
3490 * Notes:
3491 * This routine assumes no locks are held on entry.
eb44820c 3492 */
a53eb5e0
JS
3493int
3494fc_vport_terminate(struct fc_vport *vport)
3495{
3496 struct Scsi_Host *shost = vport_to_shost(vport);
3497 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3498 struct fc_internal *i = to_fc_internal(shost->transportt);
3499 struct device *dev = &vport->dev;
3500 unsigned long flags;
3501 int stat;
3502
a53eb5e0
JS
3503 if (i->f->vport_delete)
3504 stat = i->f->vport_delete(vport);
3505 else
3506 stat = -ENOENT;
3507
3508 spin_lock_irqsave(shost->host_lock, flags);
3509 vport->flags &= ~FC_VPORT_DELETING;
3510 if (!stat) {
3511 vport->flags |= FC_VPORT_DELETED;
3512 list_del(&vport->peers);
3513 fc_host->npiv_vports_inuse--;
3514 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3515 }
3516 spin_unlock_irqrestore(shost->host_lock, flags);
3517
3518 if (stat)
3519 return stat;
3520
3521 if (dev->parent != &shost->shost_gendev)
71610f55 3522 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
a53eb5e0
JS
3523 transport_remove_device(dev);
3524 device_del(dev);
3525 transport_destroy_device(dev);
3526
3527 /*
3528 * Removing our self-reference should mean our
3529 * release function gets called, which will drop the remaining
3530 * parent reference and free the data structure.
3531 */
3532 put_device(dev); /* for self-reference */
3533
3534 return 0; /* SUCCESS */
3535}
3536EXPORT_SYMBOL(fc_vport_terminate);
3537
9ef3e4a4
JS
3538/**
3539 * fc_vport_sched_delete - workq-based delete request for a vport
9ef3e4a4 3540 * @work: vport to be deleted.
eb44820c 3541 */
9ef3e4a4
JS
3542static void
3543fc_vport_sched_delete(struct work_struct *work)
3544{
3545 struct fc_vport *vport =
3546 container_of(work, struct fc_vport, vport_delete_work);
3547 int stat;
3548
3549 stat = fc_vport_terminate(vport);
3550 if (stat)
3551 dev_printk(KERN_ERR, vport->dev.parent,
3552 "%s: %s could not be deleted created via "
cadbd4a5 3553 "shost%d channel %d - error %d\n", __func__,
71610f55 3554 dev_name(&vport->dev), vport->shost->host_no,
9ef3e4a4
JS
3555 vport->channel, stat);
3556}
3557
a53eb5e0 3558
9e4f5e29
JS
3559/*
3560 * BSG support
3561 */
3562
3563
3564/**
3565 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3566 * @job: fc_bsg_job that is to be torn down
3567 */
3568static void
3569fc_destroy_bsgjob(struct fc_bsg_job *job)
3570{
3571 unsigned long flags;
3572
3573 spin_lock_irqsave(&job->job_lock, flags);
3574 if (job->ref_cnt) {
3575 spin_unlock_irqrestore(&job->job_lock, flags);
3576 return;
3577 }
3578 spin_unlock_irqrestore(&job->job_lock, flags);
3579
3580 put_device(job->dev); /* release reference for the request */
3581
3582 kfree(job->request_payload.sg_list);
3583 kfree(job->reply_payload.sg_list);
3584 kfree(job);
3585}
3586
9e4f5e29
JS
3587/**
3588 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3589 * completed
3590 * @job: fc_bsg_job that is complete
3591 */
3592static void
3593fc_bsg_jobdone(struct fc_bsg_job *job)
3594{
3595 struct request *req = job->req;
3596 struct request *rsp = req->next_rq;
9e4f5e29
JS
3597 int err;
3598
9e4f5e29 3599 err = job->req->errors = job->reply->result;
b5c6f776 3600
9e4f5e29
JS
3601 if (err < 0)
3602 /* we're only returning the result field in the reply */
3603 job->req->sense_len = sizeof(uint32_t);
3604 else
3605 job->req->sense_len = job->reply_len;
3606
3607 /* we assume all request payload was transferred, residual == 0 */
3608 req->resid_len = 0;
3609
3610 if (rsp) {
3611 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3612
3613 /* set reply (bidi) residual */
3614 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3615 rsp->resid_len);
3616 }
b5c6f776
GM
3617 blk_complete_request(req);
3618}
3619
3620/**
3621 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
fe5d20c8 3622 * @rq: BSG request that holds the job to be destroyed
b5c6f776
GM
3623 */
3624static void fc_bsg_softirq_done(struct request *rq)
3625{
3626 struct fc_bsg_job *job = rq->special;
3627 unsigned long flags;
9e4f5e29 3628
b5c6f776
GM
3629 spin_lock_irqsave(&job->job_lock, flags);
3630 job->state_flags |= FC_RQST_STATE_DONE;
3631 job->ref_cnt--;
3632 spin_unlock_irqrestore(&job->job_lock, flags);
9e4f5e29 3633
b5c6f776 3634 blk_end_request_all(rq, rq->errors);
9e4f5e29
JS
3635 fc_destroy_bsgjob(job);
3636}
3637
9e4f5e29
JS
3638/**
3639 * fc_bsg_job_timeout - handler for when a bsg request timesout
3640 * @req: request that timed out
3641 */
3642static enum blk_eh_timer_return
3643fc_bsg_job_timeout(struct request *req)
3644{
3645 struct fc_bsg_job *job = (void *) req->special;
3646 struct Scsi_Host *shost = job->shost;
3647 struct fc_internal *i = to_fc_internal(shost->transportt);
3648 unsigned long flags;
3649 int err = 0, done = 0;
3650
3651 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3652 return BLK_EH_RESET_TIMER;
3653
3654 spin_lock_irqsave(&job->job_lock, flags);
3655 if (job->state_flags & FC_RQST_STATE_DONE)
3656 done = 1;
3657 else
3658 job->ref_cnt++;
3659 spin_unlock_irqrestore(&job->job_lock, flags);
3660
3661 if (!done && i->f->bsg_timeout) {
3662 /* call LLDD to abort the i/o as it has timed out */
3663 err = i->f->bsg_timeout(job);
b8f08645
SS
3664 if (err == -EAGAIN) {
3665 job->ref_cnt--;
3666 return BLK_EH_RESET_TIMER;
3667 } else if (err)
9e4f5e29
JS
3668 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3669 "abort failed with status %d\n", err);
3670 }
3671
9e4f5e29 3672 /* the blk_end_sync_io() doesn't check the error */
47e7e89e
GM
3673 if (done)
3674 return BLK_EH_NOT_HANDLED;
3675 else
3676 return BLK_EH_HANDLED;
9e4f5e29
JS
3677}
3678
9e4f5e29
JS
3679static int
3680fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3681{
3682 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3683
3684 BUG_ON(!req->nr_phys_segments);
3685
3686 buf->sg_list = kzalloc(sz, GFP_KERNEL);
3687 if (!buf->sg_list)
3688 return -ENOMEM;
3689 sg_init_table(buf->sg_list, req->nr_phys_segments);
3690 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3691 buf->payload_len = blk_rq_bytes(req);
3692 return 0;
3693}
3694
3695
3696/**
3697 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3698 * bsg request
3699 * @shost: SCSI Host corresponding to the bsg object
3700 * @rport: (optional) FC Remote Port corresponding to the bsg object
3701 * @req: BSG request that needs a job structure
3702 */
3703static int
3704fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3705 struct request *req)
3706{
3707 struct fc_internal *i = to_fc_internal(shost->transportt);
3708 struct request *rsp = req->next_rq;
3709 struct fc_bsg_job *job;
3710 int ret;
3711
3712 BUG_ON(req->special);
3713
3714 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3715 GFP_KERNEL);
3716 if (!job)
3717 return -ENOMEM;
3718
3719 /*
3720 * Note: this is a bit silly.
3721 * The request gets formatted as a SGIO v4 ioctl request, which
3722 * then gets reformatted as a blk request, which then gets
3723 * reformatted as a fc bsg request. And on completion, we have
3724 * to wrap return results such that SGIO v4 thinks it was a scsi
3725 * status. I hope this was all worth it.
3726 */
3727
3728 req->special = job;
3729 job->shost = shost;
3730 job->rport = rport;
3731 job->req = req;
3732 if (i->f->dd_bsg_size)
3733 job->dd_data = (void *)&job[1];
3734 spin_lock_init(&job->job_lock);
3735 job->request = (struct fc_bsg_request *)req->cmd;
3736 job->request_len = req->cmd_len;
3737 job->reply = req->sense;
3738 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3739 * allocated */
3740 if (req->bio) {
3741 ret = fc_bsg_map_buffer(&job->request_payload, req);
3742 if (ret)
3743 goto failjob_rls_job;
3744 }
3745 if (rsp && rsp->bio) {
3746 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3747 if (ret)
3748 goto failjob_rls_rqst_payload;
3749 }
3750 job->job_done = fc_bsg_jobdone;
3751 if (rport)
3752 job->dev = &rport->dev;
3753 else
3754 job->dev = &shost->shost_gendev;
3755 get_device(job->dev); /* take a reference for the request */
3756
3757 job->ref_cnt = 1;
3758
3759 return 0;
3760
3761
3762failjob_rls_rqst_payload:
3763 kfree(job->request_payload.sg_list);
3764failjob_rls_job:
3765 kfree(job);
3766 return -ENOMEM;
3767}
3768
3769
3770enum fc_dispatch_result {
3771 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
3772 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
3773 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
3774};
3775
3776
3777/**
3778 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
5415907a 3779 * @q: fc host request queue
9e4f5e29
JS
3780 * @shost: scsi host rport attached to
3781 * @job: bsg job to be processed
3782 */
3783static enum fc_dispatch_result
3784fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3785 struct fc_bsg_job *job)
3786{
3787 struct fc_internal *i = to_fc_internal(shost->transportt);
3788 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3789 int ret;
3790
3791 /* Validate the host command */
3792 switch (job->request->msgcode) {
3793 case FC_BSG_HST_ADD_RPORT:
3794 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3795 break;
3796
3797 case FC_BSG_HST_DEL_RPORT:
3798 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3799 break;
3800
3801 case FC_BSG_HST_ELS_NOLOGIN:
3802 cmdlen += sizeof(struct fc_bsg_host_els);
3803 /* there better be a xmt and rcv payloads */
3804 if ((!job->request_payload.payload_len) ||
3805 (!job->reply_payload.payload_len)) {
3806 ret = -EINVAL;
3807 goto fail_host_msg;
3808 }
3809 break;
3810
3811 case FC_BSG_HST_CT:
3812 cmdlen += sizeof(struct fc_bsg_host_ct);
3813 /* there better be xmt and rcv payloads */
3814 if ((!job->request_payload.payload_len) ||
3815 (!job->reply_payload.payload_len)) {
3816 ret = -EINVAL;
3817 goto fail_host_msg;
3818 }
3819 break;
3820
3821 case FC_BSG_HST_VENDOR:
3822 cmdlen += sizeof(struct fc_bsg_host_vendor);
3823 if ((shost->hostt->vendor_id == 0L) ||
3824 (job->request->rqst_data.h_vendor.vendor_id !=
3825 shost->hostt->vendor_id)) {
3826 ret = -ESRCH;
3827 goto fail_host_msg;
3828 }
3829 break;
3830
3831 default:
3832 ret = -EBADR;
3833 goto fail_host_msg;
3834 }
3835
3836 /* check if we really have all the request data needed */
3837 if (job->request_len < cmdlen) {
3838 ret = -ENOMSG;
3839 goto fail_host_msg;
3840 }
3841
3842 ret = i->f->bsg_request(job);
3843 if (!ret)
3844 return FC_DISPATCH_UNLOCKED;
3845
3846fail_host_msg:
3847 /* return the errno failure code as the only status */
3848 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3849 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS
3850 job->reply->result = ret;
3851 job->reply_len = sizeof(uint32_t);
3852 fc_bsg_jobdone(job);
3853 return FC_DISPATCH_UNLOCKED;
3854}
3855
3856
3857/*
3858 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3859 * @rport: rport to be restarted
3860 */
3861static void
3862fc_bsg_goose_queue(struct fc_rport *rport)
3863{
9e4f5e29
JS
3864 if (!rport->rqst_q)
3865 return;
3866
c21e6beb
JA
3867 /*
3868 * This get/put dance makes no sense
3869 */
9e4f5e29 3870 get_device(&rport->dev);
c21e6beb 3871 blk_run_queue_async(rport->rqst_q);
9e4f5e29
JS
3872 put_device(&rport->dev);
3873}
3874
9e4f5e29
JS
3875/**
3876 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
5415907a 3877 * @q: rport request queue
9e4f5e29
JS
3878 * @shost: scsi host rport attached to
3879 * @rport: rport request destined to
3880 * @job: bsg job to be processed
3881 */
3882static enum fc_dispatch_result
3883fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3884 struct fc_rport *rport, struct fc_bsg_job *job)
3885{
3886 struct fc_internal *i = to_fc_internal(shost->transportt);
3887 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3888 int ret;
3889
3890 /* Validate the rport command */
3891 switch (job->request->msgcode) {
3892 case FC_BSG_RPT_ELS:
3893 cmdlen += sizeof(struct fc_bsg_rport_els);
3894 goto check_bidi;
3895
3896 case FC_BSG_RPT_CT:
3897 cmdlen += sizeof(struct fc_bsg_rport_ct);
3898check_bidi:
3899 /* there better be xmt and rcv payloads */
3900 if ((!job->request_payload.payload_len) ||
3901 (!job->reply_payload.payload_len)) {
3902 ret = -EINVAL;
3903 goto fail_rport_msg;
3904 }
3905 break;
3906 default:
3907 ret = -EBADR;
3908 goto fail_rport_msg;
3909 }
3910
3911 /* check if we really have all the request data needed */
3912 if (job->request_len < cmdlen) {
3913 ret = -ENOMSG;
3914 goto fail_rport_msg;
3915 }
3916
3917 ret = i->f->bsg_request(job);
3918 if (!ret)
3919 return FC_DISPATCH_UNLOCKED;
3920
3921fail_rport_msg:
3922 /* return the errno failure code as the only status */
3923 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3924 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS
3925 job->reply->result = ret;
3926 job->reply_len = sizeof(uint32_t);
3927 fc_bsg_jobdone(job);
3928 return FC_DISPATCH_UNLOCKED;
3929}
3930
3931
3932/**
3933 * fc_bsg_request_handler - generic handler for bsg requests
3934 * @q: request queue to manage
3935 * @shost: Scsi_Host related to the bsg object
3936 * @rport: FC remote port related to the bsg object (optional)
3937 * @dev: device structure for bsg object
3938 */
3939static void
3940fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3941 struct fc_rport *rport, struct device *dev)
3942{
3943 struct request *req;
3944 struct fc_bsg_job *job;
3945 enum fc_dispatch_result ret;
3946
3947 if (!get_device(dev))
3948 return;
3949
7eaceacc 3950 while (1) {
2bc1c59d
MC
3951 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3952 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3953 break;
9e4f5e29
JS
3954
3955 req = blk_fetch_request(q);
3956 if (!req)
3957 break;
3958
3959 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3960 req->errors = -ENXIO;
3961 spin_unlock_irq(q->queue_lock);
d88a714b 3962 blk_end_request_all(req, -ENXIO);
9e4f5e29
JS
3963 spin_lock_irq(q->queue_lock);
3964 continue;
3965 }
3966
3967 spin_unlock_irq(q->queue_lock);
3968
3969 ret = fc_req_to_bsgjob(shost, rport, req);
3970 if (ret) {
3971 req->errors = ret;
d88a714b 3972 blk_end_request_all(req, ret);
9e4f5e29
JS
3973 spin_lock_irq(q->queue_lock);
3974 continue;
3975 }
3976
3977 job = req->special;
3978
3979 /* check if we have the msgcode value at least */
3980 if (job->request_len < sizeof(uint32_t)) {
3981 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3982 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS
3983 job->reply->result = -ENOMSG;
3984 job->reply_len = sizeof(uint32_t);
3985 fc_bsg_jobdone(job);
3986 spin_lock_irq(q->queue_lock);
3987 continue;
3988 }
3989
3990 /* the dispatch routines will unlock the queue_lock */
3991 if (rport)
3992 ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3993 else
3994 ret = fc_bsg_host_dispatch(q, shost, job);
3995
3996 /* did dispatcher hit state that can't process any more */
3997 if (ret == FC_DISPATCH_BREAK)
3998 break;
3999
4000 /* did dispatcher had released the lock */
4001 if (ret == FC_DISPATCH_UNLOCKED)
4002 spin_lock_irq(q->queue_lock);
4003 }
4004
4005 spin_unlock_irq(q->queue_lock);
4006 put_device(dev);
4007 spin_lock_irq(q->queue_lock);
4008}
4009
4010
4011/**
4012 * fc_bsg_host_handler - handler for bsg requests for a fc host
4013 * @q: fc host request queue
4014 */
4015static void
4016fc_bsg_host_handler(struct request_queue *q)
4017{
4018 struct Scsi_Host *shost = q->queuedata;
4019
4020 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
4021}
4022
4023
4024/**
4025 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
4026 * @q: rport request queue
4027 */
4028static void
4029fc_bsg_rport_handler(struct request_queue *q)
4030{
4031 struct fc_rport *rport = q->queuedata;
4032 struct Scsi_Host *shost = rport_to_shost(rport);
4033
4034 fc_bsg_request_handler(q, shost, rport, &rport->dev);
4035}
4036
4037
4038/**
4039 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4040 * @shost: shost for fc_host
4041 * @fc_host: fc_host adding the structures to
4042 */
4043static int
4044fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4045{
4046 struct device *dev = &shost->shost_gendev;
4047 struct fc_internal *i = to_fc_internal(shost->transportt);
4048 struct request_queue *q;
4049 int err;
3c559ea8 4050 char bsg_name[20];
9e4f5e29
JS
4051
4052 fc_host->rqst_q = NULL;
4053
4054 if (!i->f->bsg_request)
4055 return -ENOTSUPP;
4056
4057 snprintf(bsg_name, sizeof(bsg_name),
4058 "fc_host%d", shost->host_no);
4059
4060 q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4061 if (!q) {
4062 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4063 "initialize - no request queue\n",
4064 shost->host_no);
4065 return -ENOMEM;
4066 }
4067
4068 q->queuedata = shost;
4069 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
b5c6f776 4070 blk_queue_softirq_done(q, fc_bsg_softirq_done);
9e4f5e29
JS
4071 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4072 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4073
4074 err = bsg_register_queue(q, dev, bsg_name, NULL);
4075 if (err) {
4076 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4077 "initialize - register queue\n",
4078 shost->host_no);
4079 blk_cleanup_queue(q);
4080 return err;
4081 }
4082
4083 fc_host->rqst_q = q;
4084 return 0;
4085}
4086
4087
4088/**
4089 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4090 * @shost: shost that rport is attached to
4091 * @rport: rport that the bsg hooks are being attached to
4092 */
4093static int
4094fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4095{
4096 struct device *dev = &rport->dev;
4097 struct fc_internal *i = to_fc_internal(shost->transportt);
4098 struct request_queue *q;
4099 int err;
4100
4101 rport->rqst_q = NULL;
4102
4103 if (!i->f->bsg_request)
4104 return -ENOTSUPP;
4105
4106 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4107 if (!q) {
4108 printk(KERN_ERR "%s: bsg interface failed to "
4109 "initialize - no request queue\n",
4110 dev->kobj.name);
4111 return -ENOMEM;
4112 }
4113
4114 q->queuedata = rport;
4115 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
b5c6f776 4116 blk_queue_softirq_done(q, fc_bsg_softirq_done);
9e4f5e29
JS
4117 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4118 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4119
4120 err = bsg_register_queue(q, dev, NULL, NULL);
4121 if (err) {
4122 printk(KERN_ERR "%s: bsg interface failed to "
4123 "initialize - register queue\n",
4124 dev->kobj.name);
4125 blk_cleanup_queue(q);
4126 return err;
4127 }
4128
4129 rport->rqst_q = q;
4130 return 0;
4131}
4132
4133
4134/**
4135 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4136 * @q: the request_queue that is to be torn down.
78d16341
JS
4137 *
4138 * Notes:
4139 * Before unregistering the queue empty any requests that are blocked
4140 *
4141 *
9e4f5e29
JS
4142 */
4143static void
4144fc_bsg_remove(struct request_queue *q)
4145{
4146 if (q) {
4147 bsg_unregister_queue(q);
4148 blk_cleanup_queue(q);
4149 }
4150}
4151
4152
9ef3e4a4
JS
4153/* Original Author: Martin Hicks */
4154MODULE_AUTHOR("James Smart");
1da177e4
LT
4155MODULE_DESCRIPTION("FC Transport Attributes");
4156MODULE_LICENSE("GPL");
4157
4158module_init(fc_transport_init);
4159module_exit(fc_transport_exit);