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Merge tag 'reset-fixes-for-4.14' of git://git.pengutronix.de/git/pza/linux into fixes
[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / scsi_transport_fc.c
CommitLineData
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>
c00da4c9 33#include <linux/bsg-lib.h>
1da177e4
LT		 34#include <scsi/scsi_device.h>
35#include <scsi/scsi_host.h>
36#include <scsi/scsi_transport.h>
37#include <scsi/scsi_transport_fc.h>
c829c394 38#include <scsi/scsi_cmnd.h>
84314fd4
JS		 39#include <net/netlink.h>
40#include <scsi/scsi_netlink_fc.h>
9e4f5e29 41#include <scsi/scsi_bsg_fc.h>
1da177e4
LT		 42#include "scsi_priv.h"
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" },
c21a2c1a
DK		 265 { FC_PORTSPEED_20GBIT, "20 Gbit" },
266 { FC_PORTSPEED_40GBIT, "40 Gbit" },
267 { FC_PORTSPEED_50GBIT, "50 Gbit" },
268 { FC_PORTSPEED_100GBIT, "100 Gbit" },
c749e6bc 269 { FC_PORTSPEED_25GBIT, "25 Gbit" },
1da177e4
LT		 270 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
271};
272fc_bitfield_name_search(port_speed, fc_port_speed_names)
273
274
275static int
276show_fc_fc4s (char *buf, u8 *fc4_list)
277{
278 int i, len=0;
279
280 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
281 len += sprintf(buf + len , "0x%02x ", *fc4_list);
282 len += sprintf(buf + len, "\n");
283 return len;
284}
285
286
a53eb5e0 287/* Convert FC_PORT_ROLE bit values to ascii string name */
0ad78200 288static const struct {
1da177e4
LT		 289 u32 value;
290 char *name;
a53eb5e0 291} fc_port_role_names[] = {
0c3ae266
CA		 292 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
293 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
294 { FC_PORT_ROLE_IP_PORT, "IP Port" },
295 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" },
1da177e4 296};
a53eb5e0 297fc_bitfield_name_search(port_roles, fc_port_role_names)
1da177e4
LT		 298
299/*
300 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
301 */
302#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
303#define FC_WELLKNOWN_ROLE_MASK 0x00000f
304#define FC_FPORT_PORTID 0x00000e
305#define FC_FABCTLR_PORTID 0x00000d
306#define FC_DIRSRVR_PORTID 0x00000c
307#define FC_TIMESRVR_PORTID 0x00000b
308#define FC_MGMTSRVR_PORTID 0x00000a
309
310
c4028958
DH		 311static void fc_timeout_deleted_rport(struct work_struct *work);
312static void fc_timeout_fail_rport_io(struct work_struct *work);
313static void fc_scsi_scan_rport(struct work_struct *work);
1da177e4
LT		 314
315/*
316 * Attribute counts pre object type...
317 * Increase these values if you add attributes
318 */
319#define FC_STARGET_NUM_ATTRS 3
0f29b966 320#define FC_RPORT_NUM_ATTRS 10
a53eb5e0 321#define FC_VPORT_NUM_ATTRS 9
bb8ef587 322#define FC_HOST_NUM_ATTRS 29
1da177e4
LT		 323
324struct fc_internal {
325 struct scsi_transport_template t;
326 struct fc_function_template *f;
327
328 /*
329 * For attributes : each object has :
330 * An array of the actual attributes structures
331 * An array of null-terminated pointers to the attribute
332 * structures - used for mid-layer interaction.
333 *
334 * The attribute containers for the starget and host are are
335 * part of the midlayer. As the remote port is specific to the
336 * fc transport, we must provide the attribute container.
337 */
ee959b00 338 struct device_attribute private_starget_attrs[
1da177e4 339 FC_STARGET_NUM_ATTRS];
ee959b00 340 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
1da177e4 341
ee959b00
TJ		 342 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
343 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
1da177e4
LT		 344
345 struct transport_container rport_attr_cont;
ee959b00
TJ		 346 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
347 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
a53eb5e0
JS		 348
349 struct transport_container vport_attr_cont;
ee959b00
TJ		 350 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
351 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
1da177e4
LT		 352};
353
354#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
355
d0a7e574 356static int fc_target_setup(struct transport_container *tc, struct device *dev,
ee959b00 357 struct device *cdev)
1da177e4
LT		 358{
359 struct scsi_target *starget = to_scsi_target(dev);
360 struct fc_rport *rport = starget_to_rport(starget);
361
362 /*
363 * if parent is remote port, use values from remote port.
364 * Otherwise, this host uses the fc_transport, but not the
365 * remote port interface. As such, initialize to known non-values.
366 */
367 if (rport) {
368 fc_starget_node_name(starget) = rport->node_name;
369 fc_starget_port_name(starget) = rport->port_name;
370 fc_starget_port_id(starget) = rport->port_id;
371 } else {
372 fc_starget_node_name(starget) = -1;
373 fc_starget_port_name(starget) = -1;
374 fc_starget_port_id(starget) = -1;
375 }
376
377 return 0;
378}
379
380static DECLARE_TRANSPORT_CLASS(fc_transport_class,
381 "fc_transport",
382 fc_target_setup,
383 NULL,
384 NULL);
385
d0a7e574 386static int fc_host_setup(struct transport_container *tc, struct device *dev,
ee959b00 387 struct device *cdev)
1da177e4
LT		 388{
389 struct Scsi_Host *shost = dev_to_shost(dev);
aedf3497 390 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4 391
9ef3e4a4 392 /*
1da177e4
LT		 393 * Set default values easily detected by the midlayer as
394 * failure cases. The scsi lldd is responsible for initializing
395 * all transport attributes to valid values per host.
396 */
aedf3497
JS		 397 fc_host->node_name = -1;
398 fc_host->port_name = -1;
399 fc_host->permanent_port_name = -1;
400 fc_host->supported_classes = FC_COS_UNSPECIFIED;
401 memset(fc_host->supported_fc4s, 0,
402 sizeof(fc_host->supported_fc4s));
aedf3497
JS		 403 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
404 fc_host->maxframe_size = -1;
a53eb5e0 405 fc_host->max_npiv_vports = 0;
aedf3497
JS		 406 memset(fc_host->serial_number, 0,
407 sizeof(fc_host->serial_number));
bb8ef587
NP		 408 memset(fc_host->manufacturer, 0,
409 sizeof(fc_host->manufacturer));
410 memset(fc_host->model, 0,
411 sizeof(fc_host->model));
412 memset(fc_host->model_description, 0,
413 sizeof(fc_host->model_description));
414 memset(fc_host->hardware_version, 0,
415 sizeof(fc_host->hardware_version));
416 memset(fc_host->driver_version, 0,
417 sizeof(fc_host->driver_version));
418 memset(fc_host->firmware_version, 0,
419 sizeof(fc_host->firmware_version));
420 memset(fc_host->optionrom_version, 0,
421 sizeof(fc_host->optionrom_version));
aedf3497
JS		 422
423 fc_host->port_id = -1;
424 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
425 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
426 memset(fc_host->active_fc4s, 0,
427 sizeof(fc_host->active_fc4s));
428 fc_host->speed = FC_PORTSPEED_UNKNOWN;
429 fc_host->fabric_name = -1;
b8d08210
JS		 430 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
431 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
aedf3497
JS		 432
433 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
434
435 INIT_LIST_HEAD(&fc_host->rports);
436 INIT_LIST_HEAD(&fc_host->rport_bindings);
a53eb5e0 437 INIT_LIST_HEAD(&fc_host->vports);
aedf3497
JS		 438 fc_host->next_rport_number = 0;
439 fc_host->next_target_id = 0;
a53eb5e0
JS		 440 fc_host->next_vport_number = 0;
441 fc_host->npiv_vports_inuse = 0;
aedf3497 442
aab0de24
KS		 443 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
444 "fc_wq_%d", shost->host_no);
d8537548 445 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
aedf3497
JS		 446 if (!fc_host->work_q)
447 return -ENOMEM;
448
43ca910a 449 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
aab0de24
KS		 450 snprintf(fc_host->devloss_work_q_name,
451 sizeof(fc_host->devloss_work_q_name),
452 "fc_dl_%d", shost->host_no);
d8537548
KC		 453 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
454 fc_host->devloss_work_q_name);
aedf3497
JS		 455 if (!fc_host->devloss_work_q) {
456 destroy_workqueue(fc_host->work_q);
457 fc_host->work_q = NULL;
458 return -ENOMEM;
459 }
460
9e4f5e29
JS		 461 fc_bsg_hostadd(shost, fc_host);
462 /* ignore any bsg add error - we just can't do sgio */
463
464 return 0;
465}
466
467static int fc_host_remove(struct transport_container *tc, struct device *dev,
468 struct device *cdev)
469{
470 struct Scsi_Host *shost = dev_to_shost(dev);
471 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
472
473 fc_bsg_remove(fc_host->rqst_q);
1da177e4
LT		 474 return 0;
475}
476
477static DECLARE_TRANSPORT_CLASS(fc_host_class,
478 "fc_host",
479 fc_host_setup,
9e4f5e29 480 fc_host_remove,
1da177e4
LT		 481 NULL);
482
483/*
484 * Setup and Remove actions for remote ports are handled
485 * in the service functions below.
486 */
487static DECLARE_TRANSPORT_CLASS(fc_rport_class,
488 "fc_remote_ports",
489 NULL,
490 NULL,
491 NULL);
492
a53eb5e0
JS		 493/*
494 * Setup and Remove actions for virtual ports are handled
495 * in the service functions below.
496 */
497static DECLARE_TRANSPORT_CLASS(fc_vport_class,
498 "fc_vports",
499 NULL,
500 NULL,
501 NULL);
502
eb44820c 503/*
84314fd4 504 * Netlink Infrastructure
eb44820c 505 */
84314fd4
JS		 506
507static atomic_t fc_event_seq;
508
509/**
510 * fc_get_event_number - Obtain the next sequential FC event number
511 *
512 * Notes:
eb44820c 513 * We could have inlined this, but it would have required fc_event_seq to
84314fd4
JS		 514 * be exposed. For now, live with the subroutine call.
515 * Atomic used to avoid lock/unlock...
eb44820c 516 */
84314fd4
JS		 517u32
518fc_get_event_number(void)
519{
520 return atomic_add_return(1, &fc_event_seq);
521}
522EXPORT_SYMBOL(fc_get_event_number);
523
524
525/**
526 * fc_host_post_event - called to post an even on an fc_host.
84314fd4
JS		 527 * @shost: host the event occurred on
528 * @event_number: fc event number obtained from get_fc_event_number()
529 * @event_code: fc_host event being posted
530 * @event_data: 32bits of data for the event being posted
531 *
532 * Notes:
533 * This routine assumes no locks are held on entry.
eb44820c 534 */
84314fd4
JS		 535void
536fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
537 enum fc_host_event_code event_code, u32 event_data)
538{
539 struct sk_buff *skb;
540 struct nlmsghdr *nlh;
541 struct fc_nl_event *event;
542 const char *name;
e07ebea0 543 u32 len;
84314fd4
JS		 544 int err;
545
546 if (!scsi_nl_sock) {
547 err = -ENOENT;
548 goto send_fail;
549 }
550
551 len = FC_NL_MSGALIGN(sizeof(*event));
84314fd4 552
e07ebea0 553 skb = nlmsg_new(len, GFP_KERNEL);
84314fd4
JS		 554 if (!skb) {
555 err = -ENOBUFS;
556 goto send_fail;
557 }
558
e07ebea0 559 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
84314fd4
JS		 560 if (!nlh) {
561 err = -ENOBUFS;
562 goto send_fail_skb;
563 }
e07ebea0 564 event = nlmsg_data(nlh);
84314fd4
JS		 565
566 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
567 FC_NL_ASYNC_EVENT, len);
568 event->seconds = get_seconds();
569 event->vendor_id = 0;
570 event->host_no = shost->host_no;
571 event->event_datalen = sizeof(u32); /* bytes */
572 event->event_num = event_number;
573 event->event_code = event_code;
574 event->event_data = event_data;
575
ff491a73
PNA		 576 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
577 GFP_KERNEL);
84314fd4
JS		 578 return;
579
580send_fail_skb:
581 kfree_skb(skb);
582send_fail:
583 name = get_fc_host_event_code_name(event_code);
584 printk(KERN_WARNING
585 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
cadbd4a5 586 __func__, shost->host_no,
84314fd4
JS		 587 (name) ? name : "<unknown>", event_data, err);
588 return;
589}
590EXPORT_SYMBOL(fc_host_post_event);
591
592
593/**
eb44820c 594 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
84314fd4
JS		 595 * @shost: host the event occurred on
596 * @event_number: fc event number obtained from get_fc_event_number()
597 * @data_len: amount, in bytes, of vendor unique data
598 * @data_buf: pointer to vendor unique data
eb44820c 599 * @vendor_id: Vendor id
84314fd4
JS		 600 *
601 * Notes:
602 * This routine assumes no locks are held on entry.
eb44820c 603 */
84314fd4
JS		 604void
605fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
f14e2e29 606 u32 data_len, char * data_buf, u64 vendor_id)
84314fd4
JS		 607{
608 struct sk_buff *skb;
609 struct nlmsghdr *nlh;
610 struct fc_nl_event *event;
e07ebea0 611 u32 len;
84314fd4
JS		 612 int err;
613
614 if (!scsi_nl_sock) {
615 err = -ENOENT;
616 goto send_vendor_fail;
617 }
618
619 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
84314fd4 620
e07ebea0 621 skb = nlmsg_new(len, GFP_KERNEL);
84314fd4
JS		 622 if (!skb) {
623 err = -ENOBUFS;
624 goto send_vendor_fail;
625 }
626
e07ebea0 627 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
84314fd4
JS		 628 if (!nlh) {
629 err = -ENOBUFS;
630 goto send_vendor_fail_skb;
631 }
e07ebea0 632 event = nlmsg_data(nlh);
84314fd4
JS		 633
634 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
635 FC_NL_ASYNC_EVENT, len);
636 event->seconds = get_seconds();
637 event->vendor_id = vendor_id;
638 event->host_no = shost->host_no;
639 event->event_datalen = data_len; /* bytes */
640 event->event_num = event_number;
641 event->event_code = FCH_EVT_VENDOR_UNIQUE;
642 memcpy(&event->event_data, data_buf, data_len);
643
ff491a73
PNA		 644 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
645 GFP_KERNEL);
84314fd4
JS		 646 return;
647
648send_vendor_fail_skb:
649 kfree_skb(skb);
650send_vendor_fail:
651 printk(KERN_WARNING
652 "%s: Dropped Event : host %d vendor_unique - err %d\n",
cadbd4a5 653 __func__, shost->host_no, err);
84314fd4
JS		 654 return;
655}
656EXPORT_SYMBOL(fc_host_post_vendor_event);
657
658
1da177e4
LT		 659
660static __init int fc_transport_init(void)
661{
84314fd4
JS		 662 int error;
663
664 atomic_set(&fc_event_seq, 0);
665
666 error = transport_class_register(&fc_host_class);
a53eb5e0
JS		 667 if (error)
668 return error;
669 error = transport_class_register(&fc_vport_class);
1da177e4 670 if (error)
48de68a4 671 goto unreg_host_class;
1da177e4
LT		 672 error = transport_class_register(&fc_rport_class);
673 if (error)
48de68a4
MC		 674 goto unreg_vport_class;
675 error = transport_class_register(&fc_transport_class);
676 if (error)
677 goto unreg_rport_class;
678 return 0;
679
680unreg_rport_class:
681 transport_class_unregister(&fc_rport_class);
682unreg_vport_class:
683 transport_class_unregister(&fc_vport_class);
684unreg_host_class:
685 transport_class_unregister(&fc_host_class);
686 return error;
1da177e4
LT		 687}
688
689static void __exit fc_transport_exit(void)
690{
691 transport_class_unregister(&fc_transport_class);
692 transport_class_unregister(&fc_rport_class);
693 transport_class_unregister(&fc_host_class);
a53eb5e0 694 transport_class_unregister(&fc_vport_class);
1da177e4
LT		 695}
696
697/*
698 * FC Remote Port Attribute Management
699 */
700
701#define fc_rport_show_function(field, format_string, sz, cast) \
702static ssize_t \
ee959b00
TJ		 703show_fc_rport_##field (struct device *dev, \
704 struct device_attribute *attr, char *buf) \
1da177e4 705{ \
ee959b00 706 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 707 struct Scsi_Host *shost = rport_to_shost(rport); \
708 struct fc_internal *i = to_fc_internal(shost->transportt); \
19a7b4ae
JSEC		 709 if ((i->f->get_rport_##field) && \
710 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 711 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae 712 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
1da177e4
LT		 713 i->f->get_rport_##field(rport); \
714 return snprintf(buf, sz, format_string, cast rport->field); \
715}
716
717#define fc_rport_store_function(field) \
718static ssize_t \
ee959b00
TJ		 719store_fc_rport_##field(struct device *dev, \
720 struct device_attribute *attr, \
721 const char *buf, size_t count) \
1da177e4
LT		 722{ \
723 int val; \
ee959b00 724 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 725 struct Scsi_Host *shost = rport_to_shost(rport); \
726 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 727 char *cp; \
19a7b4ae 728 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 729 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae
JSEC		 730 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
731 return -EBUSY; \
0f29b966
JS		 732 val = simple_strtoul(buf, &cp, 0); \
733 if (*cp && (*cp != '\n')) \
734 return -EINVAL; \
1da177e4
LT		 735 i->f->set_rport_##field(rport, val); \
736 return count; \
737}
738
739#define fc_rport_rd_attr(field, format_string, sz) \
740 fc_rport_show_function(field, format_string, sz, ) \
ee959b00 741static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 742 show_fc_rport_##field, NULL)
743
744#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
745 fc_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 746static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 747 show_fc_rport_##field, NULL)
748
749#define fc_rport_rw_attr(field, format_string, sz) \
750 fc_rport_show_function(field, format_string, sz, ) \
751 fc_rport_store_function(field) \
ee959b00 752static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 753 show_fc_rport_##field, \
754 store_fc_rport_##field)
755
756
757#define fc_private_rport_show_function(field, format_string, sz, cast) \
758static ssize_t \
ee959b00
TJ		 759show_fc_rport_##field (struct device *dev, \
760 struct device_attribute *attr, char *buf) \
1da177e4 761{ \
ee959b00 762 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 763 return snprintf(buf, sz, format_string, cast rport->field); \
764}
765
766#define fc_private_rport_rd_attr(field, format_string, sz) \
767 fc_private_rport_show_function(field, format_string, sz, ) \
ee959b00 768static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 769 show_fc_rport_##field, NULL)
770
771#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
772 fc_private_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 773static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 774 show_fc_rport_##field, NULL)
775
776
777#define fc_private_rport_rd_enum_attr(title, maxlen) \
778static ssize_t \
ee959b00
TJ		 779show_fc_rport_##title (struct device *dev, \
780 struct device_attribute *attr, char *buf) \
1da177e4 781{ \
ee959b00 782 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 783 const char *name; \
784 name = get_fc_##title##_name(rport->title); \
785 if (!name) \
786 return -EINVAL; \
787 return snprintf(buf, maxlen, "%s\n", name); \
788} \
ee959b00 789static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1da177e4
LT		 790 show_fc_rport_##title, NULL)
791
792
793#define SETUP_RPORT_ATTRIBUTE_RD(field) \
ee959b00 794 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 795 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
796 i->private_rport_attrs[count].store = NULL; \
797 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
798 if (i->f->show_rport_##field) \
799 count++
800
801#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
ee959b00 802 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 803 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
804 i->private_rport_attrs[count].store = NULL; \
805 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
806 count++
807
808#define SETUP_RPORT_ATTRIBUTE_RW(field) \
ee959b00 809 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 810 if (!i->f->set_rport_##field) { \
811 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
812 i->private_rport_attrs[count].store = NULL; \
813 } \
814 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
815 if (i->f->show_rport_##field) \
816 count++
817
0f29b966
JS		 818#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
819{ \
ee959b00 820 i->private_rport_attrs[count] = device_attr_rport_##field; \
0f29b966
JS		 821 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
822 count++; \
823}
824
1da177e4
LT		 825
826/* The FC Transport Remote Port Attributes: */
827
828/* Fixed Remote Port Attributes */
829
830fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
831
832static ssize_t
ee959b00
TJ		 833show_fc_rport_supported_classes (struct device *dev,
834 struct device_attribute *attr, char *buf)
1da177e4 835{
ee959b00 836 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 837 if (rport->supported_classes == FC_COS_UNSPECIFIED)
838 return snprintf(buf, 20, "unspecified\n");
839 return get_fc_cos_names(rport->supported_classes, buf);
840}
ee959b00 841static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1da177e4
LT		 842 show_fc_rport_supported_classes, NULL);
843
844/* Dynamic Remote Port Attributes */
845
19a7b4ae
JSEC		 846/*
847 * dev_loss_tmo attribute
848 */
43ca910a
MC		 849static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
850{
851 char *cp;
852
853 *val = simple_strtoul(buf, &cp, 0);
eea42270 854 if (*cp && (*cp != '\n'))
43ca910a
MC		 855 return -EINVAL;
856 /*
857 * Check for overflow; dev_loss_tmo is u32
858 */
859 if (*val > UINT_MAX)
860 return -EINVAL;
861
862 return 0;
863}
864
865static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
866 unsigned long val)
19a7b4ae 867{
19a7b4ae
JSEC		 868 struct Scsi_Host *shost = rport_to_shost(rport);
869 struct fc_internal *i = to_fc_internal(shost->transportt);
43ca910a 870
19a7b4ae 871 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
42e33148 872 (rport->port_state == FC_PORTSTATE_DELETED) ||
19a7b4ae
JSEC		 873 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
874 return -EBUSY;
36dd288f
HR		 875 /*
876 * Check for overflow; dev_loss_tmo is u32
877 */
878 if (val > UINT_MAX)
879 return -EINVAL;
880
f2818663
HR		 881 /*
882 * If fast_io_fail is off we have to cap
883 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
884 */
885 if (rport->fast_io_fail_tmo == -1 &&
886 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
887 return -EINVAL;
888
19a7b4ae 889 i->f->set_rport_dev_loss_tmo(rport, val);
43ca910a
MC		 890 return 0;
891}
892
893fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
894static ssize_t
895store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
896 const char *buf, size_t count)
897{
898 struct fc_rport *rport = transport_class_to_rport(dev);
899 unsigned long val;
900 int rc;
901
902 rc = fc_str_to_dev_loss(buf, &val);
903 if (rc)
904 return rc;
905
906 rc = fc_rport_set_dev_loss_tmo(rport, val);
907 if (rc)
908 return rc;
19a7b4ae
JSEC		 909 return count;
910}
ee959b00 911static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
19a7b4ae 912 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1da177e4
LT		 913
914
915/* Private Remote Port Attributes */
916
917fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
918fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
919fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
920
921static ssize_t
ee959b00
TJ		 922show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
923 char *buf)
1da177e4 924{
ee959b00 925 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 926
927 /* identify any roles that are port_id specific */
928 if ((rport->port_id != -1) &&
929 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
930 FC_WELLKNOWN_PORTID_MASK) {
931 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
932 case FC_FPORT_PORTID:
933 return snprintf(buf, 30, "Fabric Port\n");
934 case FC_FABCTLR_PORTID:
935 return snprintf(buf, 30, "Fabric Controller\n");
936 case FC_DIRSRVR_PORTID:
937 return snprintf(buf, 30, "Directory Server\n");
938 case FC_TIMESRVR_PORTID:
939 return snprintf(buf, 30, "Time Server\n");
940 case FC_MGMTSRVR_PORTID:
941 return snprintf(buf, 30, "Management Server\n");
942 default:
943 return snprintf(buf, 30, "Unknown Fabric Entity\n");
944 }
945 } else {
a53eb5e0 946 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1da177e4 947 return snprintf(buf, 20, "unknown\n");
a53eb5e0 948 return get_fc_port_roles_names(rport->roles, buf);
1da177e4
LT		 949 }
950}
ee959b00 951static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1da177e4
LT		 952 show_fc_rport_roles, NULL);
953
954fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
955fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
956
0f29b966
JS		 957/*
958 * fast_io_fail_tmo attribute
959 */
960static ssize_t
ee959b00
TJ		 961show_fc_rport_fast_io_fail_tmo (struct device *dev,
962 struct device_attribute *attr, char *buf)
0f29b966 963{
ee959b00 964 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 965
966 if (rport->fast_io_fail_tmo == -1)
967 return snprintf(buf, 5, "off\n");
968 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
969}
970
971static ssize_t
ee959b00
TJ		 972store_fc_rport_fast_io_fail_tmo(struct device *dev,
973 struct device_attribute *attr, const char *buf,
974 size_t count)
0f29b966
JS		 975{
976 int val;
977 char *cp;
ee959b00 978 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 979
980 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
981 (rport->port_state == FC_PORTSTATE_DELETED) ||
982 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
983 return -EBUSY;
984 if (strncmp(buf, "off", 3) == 0)
985 rport->fast_io_fail_tmo = -1;
986 else {
987 val = simple_strtoul(buf, &cp, 0);
f2818663
HR		 988 if ((*cp && (*cp != '\n')) || (val < 0))
989 return -EINVAL;
990 /*
991 * Cap fast_io_fail by dev_loss_tmo or
992 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
993 */
994 if ((val >= rport->dev_loss_tmo) ||
995 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
0f29b966 996 return -EINVAL;
f2818663 997
0f29b966
JS		 998 rport->fast_io_fail_tmo = val;
999 }
1000 return count;
1001}
ee959b00 1002static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
0f29b966 1003 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1da177e4
LT		 1004
1005
1006/*
1007 * FC SCSI Target Attribute Management
1008 */
1009
1010/*
1011 * Note: in the target show function we recognize when the remote
732bee7a 1012 * port is in the hierarchy and do not allow the driver to get
1da177e4
LT		 1013 * involved in sysfs functions. The driver only gets involved if
1014 * it's the "old" style that doesn't use rports.
1015 */
1016#define fc_starget_show_function(field, format_string, sz, cast) \
1017static ssize_t \
ee959b00
TJ		 1018show_fc_starget_##field (struct device *dev, \
1019 struct device_attribute *attr, char *buf) \
1da177e4 1020{ \
ee959b00 1021 struct scsi_target *starget = transport_class_to_starget(dev); \
1da177e4
LT		 1022 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1023 struct fc_internal *i = to_fc_internal(shost->transportt); \
1024 struct fc_rport *rport = starget_to_rport(starget); \
1025 if (rport) \
1026 fc_starget_##field(starget) = rport->field; \
1027 else if (i->f->get_starget_##field) \
1028 i->f->get_starget_##field(starget); \
1029 return snprintf(buf, sz, format_string, \
1030 cast fc_starget_##field(starget)); \
1031}
1032
1033#define fc_starget_rd_attr(field, format_string, sz) \
1034 fc_starget_show_function(field, format_string, sz, ) \
ee959b00 1035static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 1036 show_fc_starget_##field, NULL)
1037
1038#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1039 fc_starget_show_function(field, format_string, sz, (cast)) \
ee959b00 1040static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 1041 show_fc_starget_##field, NULL)
1042
1043#define SETUP_STARGET_ATTRIBUTE_RD(field) \
ee959b00 1044 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 1045 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1046 i->private_starget_attrs[count].store = NULL; \
1047 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1048 if (i->f->show_starget_##field) \
1049 count++
1050
1051#define SETUP_STARGET_ATTRIBUTE_RW(field) \
ee959b00 1052 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 1053 if (!i->f->set_starget_##field) { \
1054 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1055 i->private_starget_attrs[count].store = NULL; \
1056 } \
1057 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1058 if (i->f->show_starget_##field) \
1059 count++
1060
1061/* The FC Transport SCSI Target Attributes: */
1062fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1063fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1064fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1065
1066
a53eb5e0
JS		 1067/*
1068 * FC Virtual Port Attribute Management
1069 */
1070
1071#define fc_vport_show_function(field, format_string, sz, cast) \
1072static ssize_t \
ee959b00
TJ		 1073show_fc_vport_##field (struct device *dev, \
1074 struct device_attribute *attr, char *buf) \
a53eb5e0 1075{ \
ee959b00 1076 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1077 struct Scsi_Host *shost = vport_to_shost(vport); \
1078 struct fc_internal *i = to_fc_internal(shost->transportt); \
1079 if ((i->f->get_vport_##field) && \
1080 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1081 i->f->get_vport_##field(vport); \
1082 return snprintf(buf, sz, format_string, cast vport->field); \
1083}
1084
1085#define fc_vport_store_function(field) \
1086static ssize_t \
ee959b00
TJ		 1087store_fc_vport_##field(struct device *dev, \
1088 struct device_attribute *attr, \
1089 const char *buf, size_t count) \
a53eb5e0
JS		 1090{ \
1091 int val; \
ee959b00 1092 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1093 struct Scsi_Host *shost = vport_to_shost(vport); \
1094 struct fc_internal *i = to_fc_internal(shost->transportt); \
1095 char *cp; \
1096 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1097 return -EBUSY; \
1098 val = simple_strtoul(buf, &cp, 0); \
1099 if (*cp && (*cp != '\n')) \
1100 return -EINVAL; \
1101 i->f->set_vport_##field(vport, val); \
1102 return count; \
1103}
1104
1105#define fc_vport_store_str_function(field, slen) \
1106static ssize_t \
ee959b00
TJ		 1107store_fc_vport_##field(struct device *dev, \
1108 struct device_attribute *attr, \
1109 const char *buf, size_t count) \
a53eb5e0 1110{ \
ee959b00 1111 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1112 struct Scsi_Host *shost = vport_to_shost(vport); \
1113 struct fc_internal *i = to_fc_internal(shost->transportt); \
1114 unsigned int cnt=count; \
1115 \
1116 /* count may include a LF at end of string */ \
1117 if (buf[cnt-1] == '\n') \
1118 cnt--; \
1119 if (cnt > ((slen) - 1)) \
1120 return -EINVAL; \
1121 memcpy(vport->field, buf, cnt); \
1122 i->f->set_vport_##field(vport); \
1123 return count; \
1124}
1125
1126#define fc_vport_rd_attr(field, format_string, sz) \
1127 fc_vport_show_function(field, format_string, sz, ) \
ee959b00 1128static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1129 show_fc_vport_##field, NULL)
1130
1131#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1132 fc_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1133static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1134 show_fc_vport_##field, NULL)
1135
1136#define fc_vport_rw_attr(field, format_string, sz) \
1137 fc_vport_show_function(field, format_string, sz, ) \
1138 fc_vport_store_function(field) \
ee959b00 1139static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1140 show_fc_vport_##field, \
1141 store_fc_vport_##field)
1142
1143#define fc_private_vport_show_function(field, format_string, sz, cast) \
1144static ssize_t \
ee959b00
TJ		 1145show_fc_vport_##field (struct device *dev, \
1146 struct device_attribute *attr, char *buf) \
a53eb5e0 1147{ \
ee959b00 1148 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1149 return snprintf(buf, sz, format_string, cast vport->field); \
1150}
1151
1152#define fc_private_vport_store_u32_function(field) \
1153static ssize_t \
ee959b00
TJ		 1154store_fc_vport_##field(struct device *dev, \
1155 struct device_attribute *attr, \
1156 const char *buf, size_t count) \
a53eb5e0
JS		 1157{ \
1158 u32 val; \
ee959b00 1159 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1160 char *cp; \
1161 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1162 return -EBUSY; \
1163 val = simple_strtoul(buf, &cp, 0); \
1164 if (*cp && (*cp != '\n')) \
1165 return -EINVAL; \
1166 vport->field = val; \
1167 return count; \
1168}
1169
1170
1171#define fc_private_vport_rd_attr(field, format_string, sz) \
1172 fc_private_vport_show_function(field, format_string, sz, ) \
ee959b00 1173static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1174 show_fc_vport_##field, NULL)
1175
1176#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1177 fc_private_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1178static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1179 show_fc_vport_##field, NULL)
1180
1181#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1182 fc_private_vport_show_function(field, format_string, sz, ) \
1183 fc_private_vport_store_u32_function(field) \
ee959b00 1184static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1185 show_fc_vport_##field, \
1186 store_fc_vport_##field)
1187
1188
1189#define fc_private_vport_rd_enum_attr(title, maxlen) \
1190static ssize_t \
ee959b00
TJ		 1191show_fc_vport_##title (struct device *dev, \
1192 struct device_attribute *attr, \
1193 char *buf) \
a53eb5e0 1194{ \
ee959b00 1195 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1196 const char *name; \
1197 name = get_fc_##title##_name(vport->title); \
1198 if (!name) \
1199 return -EINVAL; \
1200 return snprintf(buf, maxlen, "%s\n", name); \
1201} \
ee959b00 1202static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
a53eb5e0
JS		 1203 show_fc_vport_##title, NULL)
1204
1205
1206#define SETUP_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1207 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1208 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1209 i->private_vport_attrs[count].store = NULL; \
1210 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1211 if (i->f->get_##field) \
1212 count++
1213 /* NOTE: Above MACRO differs: checks function not show bit */
1214
1215#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1216 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1217 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1218 i->private_vport_attrs[count].store = NULL; \
1219 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1220 count++
1221
1222#define SETUP_VPORT_ATTRIBUTE_WR(field) \
ee959b00 1223 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1224 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1225 if (i->f->field) \
1226 count++
1227 /* NOTE: Above MACRO differs: checks function */
1228
1229#define SETUP_VPORT_ATTRIBUTE_RW(field) \
ee959b00 1230 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1231 if (!i->f->set_vport_##field) { \
1232 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1233 i->private_vport_attrs[count].store = NULL; \
1234 } \
1235 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1236 count++
1237 /* NOTE: Above MACRO differs: does not check show bit */
1238
1239#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1240{ \
ee959b00 1241 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1242 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1243 count++; \
1244}
1245
1246
1247/* The FC Transport Virtual Port Attributes: */
1248
1249/* Fixed Virtual Port Attributes */
1250
1251/* Dynamic Virtual Port Attributes */
1252
1253/* Private Virtual Port Attributes */
1254
1255fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1256fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1257fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1258fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1259
1260static ssize_t
ee959b00
TJ		 1261show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1262 char *buf)
a53eb5e0 1263{
ee959b00 1264 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1265
1266 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1267 return snprintf(buf, 20, "unknown\n");
1268 return get_fc_port_roles_names(vport->roles, buf);
1269}
ee959b00 1270static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
a53eb5e0
JS		 1271
1272fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1273
1274fc_private_vport_show_function(symbolic_name, "%s\n",
1275 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1276fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
ee959b00 1277static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
a53eb5e0
JS		 1278 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1279
1280static ssize_t
ee959b00
TJ		 1281store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1282 const char *buf, size_t count)
a53eb5e0 1283{
ee959b00 1284 struct fc_vport *vport = transport_class_to_vport(dev);
9ef3e4a4 1285 struct Scsi_Host *shost = vport_to_shost(vport);
0d9dc7c8
GR		 1286 unsigned long flags;
1287
1288 spin_lock_irqsave(shost->host_lock, flags);
260f4aed 1289 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) {
0d9dc7c8
GR		 1290 spin_unlock_irqrestore(shost->host_lock, flags);
1291 return -EBUSY;
1292 }
1293 vport->flags |= FC_VPORT_DELETING;
1294 spin_unlock_irqrestore(shost->host_lock, flags);
a53eb5e0 1295
9ef3e4a4 1296 fc_queue_work(shost, &vport->vport_delete_work);
a53eb5e0
JS		 1297 return count;
1298}
ee959b00 1299static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
a53eb5e0
JS		 1300 NULL, store_fc_vport_delete);
1301
1302
1303/*
1304 * Enable/Disable vport
1305 * Write "1" to disable, write "0" to enable
1306 */
1307static ssize_t
ee959b00
TJ		 1308store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1309 const char *buf,
a53eb5e0
JS		 1310 size_t count)
1311{
ee959b00 1312 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1313 struct Scsi_Host *shost = vport_to_shost(vport);
1314 struct fc_internal *i = to_fc_internal(shost->transportt);
1315 int stat;
1316
1317 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1318 return -EBUSY;
1319
1320 if (*buf == '0') {
1321 if (vport->vport_state != FC_VPORT_DISABLED)
1322 return -EALREADY;
1323 } else if (*buf == '1') {
1324 if (vport->vport_state == FC_VPORT_DISABLED)
1325 return -EALREADY;
1326 } else
1327 return -EINVAL;
1328
1329 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1330 return stat ? stat : count;
1331}
ee959b00 1332static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
a53eb5e0
JS		 1333 NULL, store_fc_vport_disable);
1334
1335
1da177e4
LT		 1336/*
1337 * Host Attribute Management
1338 */
1339
1340#define fc_host_show_function(field, format_string, sz, cast) \
1341static ssize_t \
ee959b00
TJ		 1342show_fc_host_##field (struct device *dev, \
1343 struct device_attribute *attr, char *buf) \
1da177e4 1344{ \
ee959b00 1345 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1346 struct fc_internal *i = to_fc_internal(shost->transportt); \
1347 if (i->f->get_host_##field) \
1348 i->f->get_host_##field(shost); \
1349 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1350}
1351
1352#define fc_host_store_function(field) \
1353static ssize_t \
ee959b00
TJ		 1354store_fc_host_##field(struct device *dev, \
1355 struct device_attribute *attr, \
1356 const char *buf, size_t count) \
1da177e4
LT		 1357{ \
1358 int val; \
ee959b00 1359 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4 1360 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 1361 char *cp; \
1da177e4 1362 \
0f29b966
JS		 1363 val = simple_strtoul(buf, &cp, 0); \
1364 if (*cp && (*cp != '\n')) \
1365 return -EINVAL; \
1da177e4
LT		 1366 i->f->set_host_##field(shost, val); \
1367 return count; \
1368}
1369
b8d08210
JS		 1370#define fc_host_store_str_function(field, slen) \
1371static ssize_t \
ee959b00
TJ		 1372store_fc_host_##field(struct device *dev, \
1373 struct device_attribute *attr, \
1374 const char *buf, size_t count) \
b8d08210 1375{ \
ee959b00 1376 struct Scsi_Host *shost = transport_class_to_shost(dev); \
b8d08210
JS		 1377 struct fc_internal *i = to_fc_internal(shost->transportt); \
1378 unsigned int cnt=count; \
1379 \
1380 /* count may include a LF at end of string */ \
1381 if (buf[cnt-1] == '\n') \
1382 cnt--; \
1383 if (cnt > ((slen) - 1)) \
1384 return -EINVAL; \
1385 memcpy(fc_host_##field(shost), buf, cnt); \
1386 i->f->set_host_##field(shost); \
1387 return count; \
1388}
1389
1da177e4
LT		 1390#define fc_host_rd_attr(field, format_string, sz) \
1391 fc_host_show_function(field, format_string, sz, ) \
ee959b00 1392static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1393 show_fc_host_##field, NULL)
1394
1395#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1396 fc_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1397static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1398 show_fc_host_##field, NULL)
1399
1400#define fc_host_rw_attr(field, format_string, sz) \
1401 fc_host_show_function(field, format_string, sz, ) \
1402 fc_host_store_function(field) \
ee959b00 1403static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 1404 show_fc_host_##field, \
1405 store_fc_host_##field)
1406
1407#define fc_host_rd_enum_attr(title, maxlen) \
1408static ssize_t \
ee959b00
TJ		 1409show_fc_host_##title (struct device *dev, \
1410 struct device_attribute *attr, char *buf) \
1da177e4 1411{ \
ee959b00 1412 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1413 struct fc_internal *i = to_fc_internal(shost->transportt); \
1414 const char *name; \
1415 if (i->f->get_host_##title) \
1416 i->f->get_host_##title(shost); \
1417 name = get_fc_##title##_name(fc_host_##title(shost)); \
1418 if (!name) \
1419 return -EINVAL; \
1420 return snprintf(buf, maxlen, "%s\n", name); \
1421} \
ee959b00 1422static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1da177e4
LT		 1423
1424#define SETUP_HOST_ATTRIBUTE_RD(field) \
ee959b00 1425 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1426 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1427 i->private_host_attrs[count].store = NULL; \
1428 i->host_attrs[count] = &i->private_host_attrs[count]; \
1429 if (i->f->show_host_##field) \
1430 count++
1431
a53eb5e0 1432#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
ee959b00 1433 i->private_host_attrs[count] = device_attr_host_##field; \
a53eb5e0
JS		 1434 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1435 i->private_host_attrs[count].store = NULL; \
1436 i->host_attrs[count] = &i->private_host_attrs[count]; \
1437 count++
1438
1da177e4 1439#define SETUP_HOST_ATTRIBUTE_RW(field) \
ee959b00 1440 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1441 if (!i->f->set_host_##field) { \
1442 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1443 i->private_host_attrs[count].store = NULL; \
1444 } \
1445 i->host_attrs[count] = &i->private_host_attrs[count]; \
1446 if (i->f->show_host_##field) \
1447 count++
1448
1449
1450#define fc_private_host_show_function(field, format_string, sz, cast) \
1451static ssize_t \
ee959b00
TJ		 1452show_fc_host_##field (struct device *dev, \
1453 struct device_attribute *attr, char *buf) \
1da177e4 1454{ \
ee959b00 1455 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1456 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1457}
1458
1459#define fc_private_host_rd_attr(field, format_string, sz) \
1460 fc_private_host_show_function(field, format_string, sz, ) \
ee959b00 1461static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1462 show_fc_host_##field, NULL)
1463
1464#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1465 fc_private_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1466static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1467 show_fc_host_##field, NULL)
1468
1469#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
ee959b00 1470 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1471 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1472 i->private_host_attrs[count].store = NULL; \
1473 i->host_attrs[count] = &i->private_host_attrs[count]; \
1474 count++
1475
1476#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
91ca7b01 1477{ \
ee959b00 1478 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4 1479 i->host_attrs[count] = &i->private_host_attrs[count]; \
91ca7b01
AV		 1480 count++; \
1481}
1da177e4
LT		 1482
1483
1484/* Fixed Host Attributes */
1485
1486static ssize_t
ee959b00
TJ		 1487show_fc_host_supported_classes (struct device *dev,
1488 struct device_attribute *attr, char *buf)
1da177e4 1489{
ee959b00 1490 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1491
1492 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1493 return snprintf(buf, 20, "unspecified\n");
1494
1495 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1496}
ee959b00 1497static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1da177e4
LT		 1498 show_fc_host_supported_classes, NULL);
1499
1500static ssize_t
ee959b00
TJ		 1501show_fc_host_supported_fc4s (struct device *dev,
1502 struct device_attribute *attr, char *buf)
1da177e4 1503{
ee959b00 1504 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1505 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1506}
ee959b00 1507static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1da177e4
LT		 1508 show_fc_host_supported_fc4s, NULL);
1509
1510static ssize_t
ee959b00
TJ		 1511show_fc_host_supported_speeds (struct device *dev,
1512 struct device_attribute *attr, char *buf)
1da177e4 1513{
ee959b00 1514 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1515
1516 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1517 return snprintf(buf, 20, "unknown\n");
1518
1519 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1520}
ee959b00 1521static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1da177e4
LT		 1522 show_fc_host_supported_speeds, NULL);
1523
1524
1525fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1526fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
6b7281d0
AH		 1527fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1528 unsigned long long);
1da177e4 1529fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
a53eb5e0 1530fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1da177e4 1531fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
bb8ef587
NP		 1532fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1533fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1534fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1535fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1537fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1538fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1da177e4
LT		 1539
1540
1541/* Dynamic Host Attributes */
1542
1543static ssize_t
ee959b00
TJ		 1544show_fc_host_active_fc4s (struct device *dev,
1545 struct device_attribute *attr, char *buf)
1da177e4 1546{
ee959b00 1547 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1548 struct fc_internal *i = to_fc_internal(shost->transportt);
1549
1550 if (i->f->get_host_active_fc4s)
1551 i->f->get_host_active_fc4s(shost);
1552
1553 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1554}
ee959b00 1555static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1da177e4
LT		 1556 show_fc_host_active_fc4s, NULL);
1557
1558static ssize_t
ee959b00
TJ		 1559show_fc_host_speed (struct device *dev,
1560 struct device_attribute *attr, char *buf)
1da177e4 1561{
ee959b00 1562 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1563 struct fc_internal *i = to_fc_internal(shost->transportt);
1564
1565 if (i->f->get_host_speed)
1566 i->f->get_host_speed(shost);
1567
1568 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1569 return snprintf(buf, 20, "unknown\n");
1570
1571 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1572}
ee959b00 1573static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1da177e4
LT		 1574 show_fc_host_speed, NULL);
1575
1576
1577fc_host_rd_attr(port_id, "0x%06x\n", 20);
1578fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1579fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1580fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
016131b8 1581fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1da177e4 1582
b8d08210
JS		 1583fc_private_host_show_function(system_hostname, "%s\n",
1584 FC_SYMBOLIC_NAME_SIZE + 1, )
1585fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
ee959b00 1586static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
b8d08210
JS		 1587 show_fc_host_system_hostname, store_fc_host_system_hostname);
1588
1da177e4
LT		 1589
1590/* Private Host Attributes */
1591
1592static ssize_t
ee959b00
TJ		 1593show_fc_private_host_tgtid_bind_type(struct device *dev,
1594 struct device_attribute *attr, char *buf)
1da177e4 1595{
ee959b00 1596 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1597 const char *name;
1598
1599 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1600 if (!name)
1601 return -EINVAL;
1602 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1603}
1604
d16794f6
JSEC		 1605#define get_list_head_entry(pos, head, member) \
1606 pos = list_entry((head)->next, typeof(*pos), member)
1607
1da177e4 1608static ssize_t
ee959b00
TJ		 1609store_fc_private_host_tgtid_bind_type(struct device *dev,
1610 struct device_attribute *attr, const char *buf, size_t count)
1da177e4 1611{
ee959b00 1612 struct Scsi_Host *shost = transport_class_to_shost(dev);
d16794f6 1613 struct fc_rport *rport;
1da177e4
LT		 1614 enum fc_tgtid_binding_type val;
1615 unsigned long flags;
1616
1617 if (get_fc_tgtid_bind_type_match(buf, &val))
1618 return -EINVAL;
1619
1620 /* if changing bind type, purge all unused consistent bindings */
1621 if (val != fc_host_tgtid_bind_type(shost)) {
1622 spin_lock_irqsave(shost->host_lock, flags);
d16794f6
JSEC		 1623 while (!list_empty(&fc_host_rport_bindings(shost))) {
1624 get_list_head_entry(rport,
1625 &fc_host_rport_bindings(shost), peers);
aedf3497
JS		 1626 list_del(&rport->peers);
1627 rport->port_state = FC_PORTSTATE_DELETED;
1628 fc_queue_work(shost, &rport->rport_delete_work);
d16794f6 1629 }
1da177e4
LT		 1630 spin_unlock_irqrestore(shost->host_lock, flags);
1631 }
1632
1633 fc_host_tgtid_bind_type(shost) = val;
1634 return count;
1635}
1636
ee959b00 1637static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1da177e4
LT		 1638 show_fc_private_host_tgtid_bind_type,
1639 store_fc_private_host_tgtid_bind_type);
1640
91ca7b01 1641static ssize_t
ee959b00
TJ		 1642store_fc_private_host_issue_lip(struct device *dev,
1643 struct device_attribute *attr, const char *buf, size_t count)
91ca7b01 1644{
ee959b00 1645 struct Scsi_Host *shost = transport_class_to_shost(dev);
91ca7b01
AV		 1646 struct fc_internal *i = to_fc_internal(shost->transportt);
1647 int ret;
1648
1649 /* ignore any data value written to the attribute */
1650 if (i->f->issue_fc_host_lip) {
1651 ret = i->f->issue_fc_host_lip(shost);
1652 return ret ? ret: count;
1653 }
1654
1655 return -ENOENT;
1656}
1657
ee959b00 1658static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
91ca7b01
AV		 1659 store_fc_private_host_issue_lip);
1660
43ca910a
MC		 1661static ssize_t
1662store_fc_private_host_dev_loss_tmo(struct device *dev,
1663 struct device_attribute *attr,
1664 const char *buf, size_t count)
1665{
1666 struct Scsi_Host *shost = transport_class_to_shost(dev);
1667 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1668 struct fc_rport *rport;
1669 unsigned long val, flags;
1670 int rc;
1671
1672 rc = fc_str_to_dev_loss(buf, &val);
1673 if (rc)
1674 return rc;
1675
1676 fc_host_dev_loss_tmo(shost) = val;
1677 spin_lock_irqsave(shost->host_lock, flags);
1678 list_for_each_entry(rport, &fc_host->rports, peers)
1679 fc_rport_set_dev_loss_tmo(rport, val);
1680 spin_unlock_irqrestore(shost->host_lock, flags);
1681 return count;
1682}
a53eb5e0 1683
43ca910a
MC		 1684fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1685static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1686 show_fc_host_dev_loss_tmo,
1687 store_fc_private_host_dev_loss_tmo);
1688
1689fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
a53eb5e0 1690
1da177e4
LT		 1691/*
1692 * Host Statistics Management
1693 */
1694
134699d2 1695/* Show a given attribute in the statistics group */
1da177e4 1696static ssize_t
ee959b00 1697fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1da177e4 1698{
ee959b00 1699 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1700 struct fc_internal *i = to_fc_internal(shost->transportt);
1701 struct fc_host_statistics *stats;
1702 ssize_t ret = -ENOENT;
1703
1704 if (offset > sizeof(struct fc_host_statistics) ||
1705 offset % sizeof(u64) != 0)
1706 WARN_ON(1);
1707
1708 if (i->f->get_fc_host_stats) {
1709 stats = (i->f->get_fc_host_stats)(shost);
1710 if (stats)
1711 ret = snprintf(buf, 20, "0x%llx\n",
1712 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1713 }
1714 return ret;
1715}
1716
1717
1718/* generate a read-only statistics attribute */
1719#define fc_host_statistic(name) \
ee959b00
TJ		 1720static ssize_t show_fcstat_##name(struct device *cd, \
1721 struct device_attribute *attr, \
1722 char *buf) \
1da177e4
LT		 1723{ \
1724 return fc_stat_show(cd, buf, \
1725 offsetof(struct fc_host_statistics, name)); \
1726} \
ee959b00 1727static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1da177e4
LT		 1728
1729fc_host_statistic(seconds_since_last_reset);
1730fc_host_statistic(tx_frames);
1731fc_host_statistic(tx_words);
1732fc_host_statistic(rx_frames);
1733fc_host_statistic(rx_words);
1734fc_host_statistic(lip_count);
1735fc_host_statistic(nos_count);
1736fc_host_statistic(error_frames);
1737fc_host_statistic(dumped_frames);
1738fc_host_statistic(link_failure_count);
1739fc_host_statistic(loss_of_sync_count);
1740fc_host_statistic(loss_of_signal_count);
1741fc_host_statistic(prim_seq_protocol_err_count);
1742fc_host_statistic(invalid_tx_word_count);
1743fc_host_statistic(invalid_crc_count);
1744fc_host_statistic(fcp_input_requests);
1745fc_host_statistic(fcp_output_requests);
1746fc_host_statistic(fcp_control_requests);
1747fc_host_statistic(fcp_input_megabytes);
1748fc_host_statistic(fcp_output_megabytes);
e58abb0c
VD		 1749fc_host_statistic(fcp_packet_alloc_failures);
1750fc_host_statistic(fcp_packet_aborts);
1751fc_host_statistic(fcp_frame_alloc_failures);
1752fc_host_statistic(fc_no_free_exch);
1753fc_host_statistic(fc_no_free_exch_xid);
1754fc_host_statistic(fc_xid_not_found);
1755fc_host_statistic(fc_xid_busy);
1756fc_host_statistic(fc_seq_not_found);
1757fc_host_statistic(fc_non_bls_resp);
1da177e4
LT		 1758
1759static ssize_t
ee959b00
TJ		 1760fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1761 const char *buf, size_t count)
1da177e4 1762{
ee959b00 1763 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1764 struct fc_internal *i = to_fc_internal(shost->transportt);
1765
1766 /* ignore any data value written to the attribute */
1767 if (i->f->reset_fc_host_stats) {
1768 i->f->reset_fc_host_stats(shost);
1769 return count;
1770 }
1771
1772 return -ENOENT;
1773}
ee959b00 1774static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1da177e4
LT		 1775 fc_reset_statistics);
1776
1da177e4 1777static struct attribute *fc_statistics_attrs[] = {
ee959b00
TJ		 1778 &device_attr_host_seconds_since_last_reset.attr,
1779 &device_attr_host_tx_frames.attr,
1780 &device_attr_host_tx_words.attr,
1781 &device_attr_host_rx_frames.attr,
1782 &device_attr_host_rx_words.attr,
1783 &device_attr_host_lip_count.attr,
1784 &device_attr_host_nos_count.attr,
1785 &device_attr_host_error_frames.attr,
1786 &device_attr_host_dumped_frames.attr,
1787 &device_attr_host_link_failure_count.attr,
1788 &device_attr_host_loss_of_sync_count.attr,
1789 &device_attr_host_loss_of_signal_count.attr,
1790 &device_attr_host_prim_seq_protocol_err_count.attr,
1791 &device_attr_host_invalid_tx_word_count.attr,
1792 &device_attr_host_invalid_crc_count.attr,
1793 &device_attr_host_fcp_input_requests.attr,
1794 &device_attr_host_fcp_output_requests.attr,
1795 &device_attr_host_fcp_control_requests.attr,
1796 &device_attr_host_fcp_input_megabytes.attr,
1797 &device_attr_host_fcp_output_megabytes.attr,
e58abb0c
VD		 1798 &device_attr_host_fcp_packet_alloc_failures.attr,
1799 &device_attr_host_fcp_packet_aborts.attr,
1800 &device_attr_host_fcp_frame_alloc_failures.attr,
1801 &device_attr_host_fc_no_free_exch.attr,
1802 &device_attr_host_fc_no_free_exch_xid.attr,
1803 &device_attr_host_fc_xid_not_found.attr,
1804 &device_attr_host_fc_xid_busy.attr,
1805 &device_attr_host_fc_seq_not_found.attr,
1806 &device_attr_host_fc_non_bls_resp.attr,
ee959b00 1807 &device_attr_host_reset_statistics.attr,
1da177e4
LT		 1808 NULL
1809};
1810
1811static struct attribute_group fc_statistics_group = {
1812 .name = "statistics",
1813 .attrs = fc_statistics_attrs,
1814};
1815
a53eb5e0
JS		 1816
1817/* Host Vport Attributes */
1818
1819static int
1820fc_parse_wwn(const char *ns, u64 *nm)
1821{
1822 unsigned int i, j;
1823 u8 wwn[8];
1824
1825 memset(wwn, 0, sizeof(wwn));
1826
1827 /* Validate and store the new name */
1828 for (i=0, j=0; i < 16; i++) {
ecc30990
AS		 1829 int value;
1830
1831 value = hex_to_bin(*ns++);
1832 if (value >= 0)
1833 j = (j << 4) | value;
a53eb5e0
JS		 1834 else
1835 return -EINVAL;
1836 if (i % 2) {
1837 wwn[i/2] = j & 0xff;
1838 j = 0;
1839 }
1840 }
1841
1842 *nm = wwn_to_u64(wwn);
1843
1844 return 0;
1845}
1846
1847
1848/*
1849 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1850 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1851 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1852 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1853 */
1854static ssize_t
ee959b00
TJ		 1855store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1856 const char *buf, size_t count)
a53eb5e0 1857{
ee959b00 1858 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1859 struct fc_vport_identifiers vid;
1860 struct fc_vport *vport;
1861 unsigned int cnt=count;
1862 int stat;
1863
1864 memset(&vid, 0, sizeof(vid));
1865
1866 /* count may include a LF at end of string */
1867 if (buf[cnt-1] == '\n')
1868 cnt--;
1869
1870 /* validate we have enough characters for WWPN */
1871 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1872 return -EINVAL;
1873
1874 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1875 if (stat)
1876 return stat;
1877
1878 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1879 if (stat)
1880 return stat;
1881
1882 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1883 vid.vport_type = FC_PORTTYPE_NPIV;
1884 /* vid.symbolic_name is already zero/NULL's */
1885 vid.disable = false; /* always enabled */
1886
1887 /* we only allow support on Channel 0 !!! */
a30c3f69 1888 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
a53eb5e0
JS		 1889 return stat ? stat : count;
1890}
ee959b00 1891static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
a53eb5e0
JS		 1892 store_fc_host_vport_create);
1893
1894
1895/*
1896 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1897 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1898 * The WWNs are specified as hex characters, and may *not* contain
1899 * any prefixes (e.g. 0x, x, etc)
1900 */
1901static ssize_t
ee959b00
TJ		 1902store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1903 const char *buf, size_t count)
a53eb5e0 1904{
ee959b00 1905 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1906 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1907 struct fc_vport *vport;
1908 u64 wwpn, wwnn;
1909 unsigned long flags;
1910 unsigned int cnt=count;
1911 int stat, match;
1912
1913 /* count may include a LF at end of string */
1914 if (buf[cnt-1] == '\n')
1915 cnt--;
1916
1917 /* validate we have enough characters for WWPN */
1918 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1919 return -EINVAL;
1920
1921 stat = fc_parse_wwn(&buf[0], &wwpn);
1922 if (stat)
1923 return stat;
1924
1925 stat = fc_parse_wwn(&buf[17], &wwnn);
1926 if (stat)
1927 return stat;
1928
1929 spin_lock_irqsave(shost->host_lock, flags);
1930 match = 0;
1931 /* we only allow support on Channel 0 !!! */
1932 list_for_each_entry(vport, &fc_host->vports, peers) {
1933 if ((vport->channel == 0) &&
1934 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
0d9dc7c8
GR		 1935 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1936 break;
1937 vport->flags |= FC_VPORT_DELETING;
a53eb5e0
JS		 1938 match = 1;
1939 break;
1940 }
1941 }
1942 spin_unlock_irqrestore(shost->host_lock, flags);
1943
1944 if (!match)
1945 return -ENODEV;
1946
1947 stat = fc_vport_terminate(vport);
1948 return stat ? stat : count;
1949}
ee959b00 1950static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
a53eb5e0
JS		 1951 store_fc_host_vport_delete);
1952
1953
1da177e4
LT		 1954static int fc_host_match(struct attribute_container *cont,
1955 struct device *dev)
1956{
1957 struct Scsi_Host *shost;
1958 struct fc_internal *i;
1959
1960 if (!scsi_is_host_device(dev))
1961 return 0;
1962
1963 shost = dev_to_shost(dev);
1964 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1965 != &fc_host_class.class)
1966 return 0;
1967
1968 i = to_fc_internal(shost->transportt);
1969
1970 return &i->t.host_attrs.ac == cont;
1971}
1972
1973static int fc_target_match(struct attribute_container *cont,
1974 struct device *dev)
1975{
1976 struct Scsi_Host *shost;
1977 struct fc_internal *i;
1978
1979 if (!scsi_is_target_device(dev))
1980 return 0;
1981
1982 shost = dev_to_shost(dev->parent);
1983 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1984 != &fc_host_class.class)
1985 return 0;
1986
1987 i = to_fc_internal(shost->transportt);
1988
1989 return &i->t.target_attrs.ac == cont;
1990}
1991
1992static void fc_rport_dev_release(struct device *dev)
1993{
1994 struct fc_rport *rport = dev_to_rport(dev);
1995 put_device(dev->parent);
1996 kfree(rport);
1997}
1998
1999int scsi_is_fc_rport(const struct device *dev)
2000{
2001 return dev->release == fc_rport_dev_release;
2002}
2003EXPORT_SYMBOL(scsi_is_fc_rport);
2004
2005static int fc_rport_match(struct attribute_container *cont,
2006 struct device *dev)
2007{
2008 struct Scsi_Host *shost;
2009 struct fc_internal *i;
2010
2011 if (!scsi_is_fc_rport(dev))
2012 return 0;
2013
2014 shost = dev_to_shost(dev->parent);
2015 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2016 != &fc_host_class.class)
2017 return 0;
2018
2019 i = to_fc_internal(shost->transportt);
2020
2021 return &i->rport_attr_cont.ac == cont;
2022}
2023
5c44cd2a 2024
a53eb5e0
JS		 2025static void fc_vport_dev_release(struct device *dev)
2026{
2027 struct fc_vport *vport = dev_to_vport(dev);
2028 put_device(dev->parent); /* release kobj parent */
2029 kfree(vport);
2030}
2031
62055172 2032static int scsi_is_fc_vport(const struct device *dev)
a53eb5e0
JS		 2033{
2034 return dev->release == fc_vport_dev_release;
2035}
a53eb5e0
JS		 2036
2037static int fc_vport_match(struct attribute_container *cont,
2038 struct device *dev)
2039{
2040 struct fc_vport *vport;
2041 struct Scsi_Host *shost;
2042 struct fc_internal *i;
2043
2044 if (!scsi_is_fc_vport(dev))
2045 return 0;
2046 vport = dev_to_vport(dev);
2047
2048 shost = vport_to_shost(vport);
2049 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2050 != &fc_host_class.class)
2051 return 0;
2052
2053 i = to_fc_internal(shost->transportt);
2054 return &i->vport_attr_cont.ac == cont;
2055}
2056
2057
c829c394 2058/**
b6a05c82 2059 * fc_eh_timed_out - FC Transport I/O timeout intercept handler
c829c394
JS		 2060 * @scmd: The SCSI command which timed out
2061 *
2062 * This routine protects against error handlers getting invoked while a
2063 * rport is in a blocked state, typically due to a temporarily loss of
2064 * connectivity. If the error handlers are allowed to proceed, requests
2065 * to abort i/o, reset the target, etc will likely fail as there is no way
2066 * to communicate with the device to perform the requested function. These
2067 * failures may result in the midlayer taking the device offline, requiring
2068 * manual intervention to restore operation.
2069 *
2070 * This routine, called whenever an i/o times out, validates the state of
2071 * the underlying rport. If the rport is blocked, it returns
2072 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2073 * Eventually, either the device will return, or devloss_tmo will fire,
2074 * and when the timeout then fires, it will be handled normally.
2075 * If the rport is not blocked, normal error handling continues.
2076 *
2077 * Notes:
2078 * This routine assumes no locks are held on entry.
eb44820c 2079 */
b6a05c82
CH		 2080enum blk_eh_timer_return
2081fc_eh_timed_out(struct scsi_cmnd *scmd)
c829c394
JS		 2082{
2083 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2084
2085 if (rport->port_state == FC_PORTSTATE_BLOCKED)
242f9dcb 2086 return BLK_EH_RESET_TIMER;
c829c394 2087
242f9dcb 2088 return BLK_EH_NOT_HANDLED;
c829c394 2089}
b6a05c82 2090EXPORT_SYMBOL(fc_eh_timed_out);
c829c394 2091
5c44cd2a 2092/*
bda23253
JS		 2093 * Called by fc_user_scan to locate an rport on the shost that
2094 * matches the channel and target id, and invoke scsi_scan_target()
2095 * on the rport.
5c44cd2a 2096 */
bda23253 2097static void
9cb78c16 2098fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
5c44cd2a
JSEC		 2099{
2100 struct fc_rport *rport;
bda23253
JS		 2101 unsigned long flags;
2102
2103 spin_lock_irqsave(shost->host_lock, flags);
5c44cd2a 2104
e02f3f59
CH		 2105 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2106 if (rport->scsi_target_id == -1)
2107 continue;
5c44cd2a 2108
0d2fcd9f
HR		 2109 if (rport->port_state != FC_PORTSTATE_ONLINE)
2110 continue;
2111
bda23253
JS		 2112 if ((channel == rport->channel) &&
2113 (id == rport->scsi_target_id)) {
2114 spin_unlock_irqrestore(shost->host_lock, flags);
1d645088
HR		 2115 scsi_scan_target(&rport->dev, channel, id, lun,
2116 SCSI_SCAN_MANUAL);
bda23253 2117 return;
e02f3f59
CH		 2118 }
2119 }
2120
bda23253
JS		 2121 spin_unlock_irqrestore(shost->host_lock, flags);
2122}
2123
2124/*
2125 * Called via sysfs scan routines. Necessary, as the FC transport
2126 * wants to place all target objects below the rport object. So this
2127 * routine must invoke the scsi_scan_target() routine with the rport
2128 * object as the parent.
2129 */
2130static int
9cb78c16 2131fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
bda23253
JS		 2132{
2133 uint chlo, chhi;
2134 uint tgtlo, tgthi;
2135
2136 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2137 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2138 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2139 return -EINVAL;
2140
2141 if (channel == SCAN_WILD_CARD) {
2142 chlo = 0;
2143 chhi = shost->max_channel + 1;
2144 } else {
2145 chlo = channel;
2146 chhi = channel + 1;
2147 }
2148
2149 if (id == SCAN_WILD_CARD) {
2150 tgtlo = 0;
2151 tgthi = shost->max_id;
2152 } else {
2153 tgtlo = id;
2154 tgthi = id + 1;
2155 }
2156
2157 for ( ; chlo < chhi; chlo++)
2158 for ( ; tgtlo < tgthi; tgtlo++)
2159 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2160
e02f3f59 2161 return 0;
5c44cd2a
JSEC		 2162}
2163
1da177e4
LT		 2164struct scsi_transport_template *
2165fc_attach_transport(struct fc_function_template *ft)
2166{
1da177e4 2167 int count;
24669f75
JS		 2168 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2169 GFP_KERNEL);
1da177e4
LT		 2170
2171 if (unlikely(!i))
2172 return NULL;
2173
1da177e4
LT		 2174 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2175 i->t.target_attrs.ac.class = &fc_transport_class.class;
2176 i->t.target_attrs.ac.match = fc_target_match;
2177 i->t.target_size = sizeof(struct fc_starget_attrs);
2178 transport_container_register(&i->t.target_attrs);
2179
2180 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2181 i->t.host_attrs.ac.class = &fc_host_class.class;
2182 i->t.host_attrs.ac.match = fc_host_match;
2183 i->t.host_size = sizeof(struct fc_host_attrs);
2184 if (ft->get_fc_host_stats)
2185 i->t.host_attrs.statistics = &fc_statistics_group;
2186 transport_container_register(&i->t.host_attrs);
2187
2188 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2189 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2190 i->rport_attr_cont.ac.match = fc_rport_match;
2191 transport_container_register(&i->rport_attr_cont);
2192
a53eb5e0
JS		 2193 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2194 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2195 i->vport_attr_cont.ac.match = fc_vport_match;
2196 transport_container_register(&i->vport_attr_cont);
2197
1da177e4
LT		 2198 i->f = ft;
2199
2200 /* Transport uses the shost workq for scsi scanning */
2201 i->t.create_work_queue = 1;
5c44cd2a 2202
e02f3f59 2203 i->t.user_scan = fc_user_scan;
9ef3e4a4 2204
1da177e4
LT		 2205 /*
2206 * Setup SCSI Target Attributes.
2207 */
2208 count = 0;
2209 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2210 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2211 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2212
2213 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2214
2215 i->starget_attrs[count] = NULL;
2216
2217
2218 /*
2219 * Setup SCSI Host Attributes.
2220 */
2221 count=0;
2222 SETUP_HOST_ATTRIBUTE_RD(node_name);
2223 SETUP_HOST_ATTRIBUTE_RD(port_name);
6b7281d0 2224 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1da177e4
LT		 2225 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2226 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1da177e4
LT		 2227 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2228 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
a53eb5e0
JS		 2229 if (ft->vport_create) {
2230 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2231 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2232 }
1da177e4 2233 SETUP_HOST_ATTRIBUTE_RD(serial_number);
bb8ef587
NP		 2234 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2235 SETUP_HOST_ATTRIBUTE_RD(model);
2236 SETUP_HOST_ATTRIBUTE_RD(model_description);
2237 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2238 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2239 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2240 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
1da177e4
LT		 2241
2242 SETUP_HOST_ATTRIBUTE_RD(port_id);
2243 SETUP_HOST_ATTRIBUTE_RD(port_type);
2244 SETUP_HOST_ATTRIBUTE_RD(port_state);
2245 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2246 SETUP_HOST_ATTRIBUTE_RD(speed);
2247 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
016131b8 2248 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
b8d08210 2249 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
1da177e4
LT		 2250
2251 /* Transport-managed attributes */
43ca910a 2252 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
1da177e4 2253 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
91ca7b01
AV		 2254 if (ft->issue_fc_host_lip)
2255 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
a53eb5e0
JS		 2256 if (ft->vport_create)
2257 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2258 if (ft->vport_delete)
2259 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
1da177e4
LT		 2260
2261 BUG_ON(count > FC_HOST_NUM_ATTRS);
2262
2263 i->host_attrs[count] = NULL;
2264
2265 /*
2266 * Setup Remote Port Attributes.
2267 */
2268 count=0;
2269 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2270 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2271 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2272 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2273 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2274 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2275 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2276 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2277 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
fff9d40c 2278 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
1da177e4
LT		 2279
2280 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2281
2282 i->rport_attrs[count] = NULL;
2283
a53eb5e0
JS		 2284 /*
2285 * Setup Virtual Port Attributes.
2286 */
2287 count=0;
2288 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2289 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2290 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2291 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2292 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2293 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2294 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2295 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2296 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2297
2298 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2299
2300 i->vport_attrs[count] = NULL;
2301
1da177e4
LT		 2302 return &i->t;
2303}
2304EXPORT_SYMBOL(fc_attach_transport);
2305
2306void fc_release_transport(struct scsi_transport_template *t)
2307{
2308 struct fc_internal *i = to_fc_internal(t);
2309
2310 transport_container_unregister(&i->t.target_attrs);
2311 transport_container_unregister(&i->t.host_attrs);
2312 transport_container_unregister(&i->rport_attr_cont);
a53eb5e0 2313 transport_container_unregister(&i->vport_attr_cont);
1da177e4
LT		 2314
2315 kfree(i);
2316}
2317EXPORT_SYMBOL(fc_release_transport);
2318
aedf3497
JS		 2319/**
2320 * fc_queue_work - Queue work to the fc_host workqueue.
2321 * @shost: Pointer to Scsi_Host bound to fc_host.
2322 * @work: Work to queue for execution.
2323 *
2324 * Return value:
a0785edf
JS		 2325 * 1 - work queued for execution
2326 * 0 - work is already queued
2327 * -EINVAL - work queue doesn't exist
eb44820c 2328 */
aedf3497
JS		 2329static int
2330fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2331{
2332 if (unlikely(!fc_host_work_q(shost))) {
2333 printk(KERN_ERR
2334 "ERROR: FC host '%s' attempted to queue work, "
2335 "when no workqueue created.\n", shost->hostt->name);
2336 dump_stack();
2337
2338 return -EINVAL;
2339 }
2340
2341 return queue_work(fc_host_work_q(shost), work);
2342}
2343
2344/**
2345 * fc_flush_work - Flush a fc_host's workqueue.
2346 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2347 */
aedf3497
JS		 2348static void
2349fc_flush_work(struct Scsi_Host *shost)
2350{
2351 if (!fc_host_work_q(shost)) {
2352 printk(KERN_ERR
2353 "ERROR: FC host '%s' attempted to flush work, "
2354 "when no workqueue created.\n", shost->hostt->name);
2355 dump_stack();
2356 return;
2357 }
2358
2359 flush_workqueue(fc_host_work_q(shost));
2360}
2361
2362/**
2363 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2364 * @shost: Pointer to Scsi_Host bound to fc_host.
2365 * @work: Work to queue for execution.
2366 * @delay: jiffies to delay the work queuing
2367 *
2368 * Return value:
0f29b966 2369 * 1 on success / 0 already queued / < 0 for error
eb44820c 2370 */
aedf3497 2371static int
c4028958 2372fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
aedf3497
JS		 2373 unsigned long delay)
2374{
2375 if (unlikely(!fc_host_devloss_work_q(shost))) {
2376 printk(KERN_ERR
2377 "ERROR: FC host '%s' attempted to queue work, "
2378 "when no workqueue created.\n", shost->hostt->name);
2379 dump_stack();
2380
2381 return -EINVAL;
2382 }
2383
2384 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2385}
2386
2387/**
2388 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2389 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2390 */
aedf3497
JS		 2391static void
2392fc_flush_devloss(struct Scsi_Host *shost)
2393{
2394 if (!fc_host_devloss_work_q(shost)) {
2395 printk(KERN_ERR
2396 "ERROR: FC host '%s' attempted to flush work, "
2397 "when no workqueue created.\n", shost->hostt->name);
2398 dump_stack();
2399 return;
2400 }
2401
2402 flush_workqueue(fc_host_devloss_work_q(shost));
2403}
2404
1da177e4
LT		 2405
2406/**
eb44820c
RL		 2407 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2408 * @shost: Which &Scsi_Host
1da177e4 2409 *
25985edc 2410 * This routine is expected to be called immediately preceding the
1da177e4
LT		 2411 * a driver's call to scsi_remove_host().
2412 *
2413 * WARNING: A driver utilizing the fc_transport, which fails to call
eb44820c 2414 * this routine prior to scsi_remove_host(), will leave dangling
1da177e4
LT		 2415 * objects in /sys/class/fc_remote_ports. Access to any of these
2416 * objects can result in a system crash !!!
2417 *
2418 * Notes:
2419 * This routine assumes no locks are held on entry.
eb44820c 2420 */
1da177e4
LT		 2421void
2422fc_remove_host(struct Scsi_Host *shost)
2423{
a53eb5e0
JS		 2424 struct fc_vport *vport = NULL, *next_vport = NULL;
2425 struct fc_rport *rport = NULL, *next_rport = NULL;
aedf3497
JS		 2426 struct workqueue_struct *work_q;
2427 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
a53eb5e0 2428 unsigned long flags;
a53eb5e0
JS		 2429
2430 spin_lock_irqsave(shost->host_lock, flags);
2431
2432 /* Remove any vports */
260f4aed
HR		 2433 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2434 vport->flags |= FC_VPORT_DELETING;
9ef3e4a4 2435 fc_queue_work(shost, &vport->vport_delete_work);
260f4aed 2436 }
1da177e4
LT		 2437
2438 /* Remove any remote ports */
2439 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2440 &fc_host->rports, peers) {
2441 list_del(&rport->peers);
2442 rport->port_state = FC_PORTSTATE_DELETED;
2443 fc_queue_work(shost, &rport->rport_delete_work);
2444 }
2445
1da177e4 2446 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2447 &fc_host->rport_bindings, peers) {
2448 list_del(&rport->peers);
2449 rport->port_state = FC_PORTSTATE_DELETED;
2450 fc_queue_work(shost, &rport->rport_delete_work);
2451 }
2452
a53eb5e0
JS		 2453 spin_unlock_irqrestore(shost->host_lock, flags);
2454
aedf3497
JS		 2455 /* flush all scan work items */
2456 scsi_flush_work(shost);
2457
2458 /* flush all stgt delete, and rport delete work items, then kill it */
2459 if (fc_host->work_q) {
2460 work_q = fc_host->work_q;
2461 fc_host->work_q = NULL;
2462 destroy_workqueue(work_q);
2463 }
2464
2465 /* flush all devloss work items, then kill it */
2466 if (fc_host->devloss_work_q) {
2467 work_q = fc_host->devloss_work_q;
2468 fc_host->devloss_work_q = NULL;
2469 destroy_workqueue(work_q);
2470 }
1da177e4
LT		 2471}
2472EXPORT_SYMBOL(fc_remove_host);
2473
fff9d40c
MC		 2474static void fc_terminate_rport_io(struct fc_rport *rport)
2475{
2476 struct Scsi_Host *shost = rport_to_shost(rport);
2477 struct fc_internal *i = to_fc_internal(shost->transportt);
2478
2479 /* Involve the LLDD if possible to terminate all io on the rport. */
2480 if (i->f->terminate_rport_io)
2481 i->f->terminate_rport_io(rport);
2482
2483 /*
5d9fb5cc 2484 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
fff9d40c 2485 */
5d9fb5cc 2486 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
fff9d40c 2487}
aedf3497
JS		 2488
2489/**
25985edc 2490 * fc_starget_delete - called to delete the scsi descendants of an rport
c4028958 2491 * @work: remote port to be operated on.
eb44820c
RL		 2492 *
2493 * Deletes target and all sdevs.
2494 */
19a7b4ae 2495static void
c4028958 2496fc_starget_delete(struct work_struct *work)
19a7b4ae 2497{
c4028958
DH		 2498 struct fc_rport *rport =
2499 container_of(work, struct fc_rport, stgt_delete_work);
19a7b4ae 2500
fff9d40c 2501 fc_terminate_rport_io(rport);
19a7b4ae
JSEC		 2502 scsi_remove_target(&rport->dev);
2503}
2504
aedf3497
JS		 2505
2506/**
2507 * fc_rport_final_delete - finish rport termination and delete it.
c4028958 2508 * @work: remote port to be deleted.
eb44820c 2509 */
aedf3497 2510static void
c4028958 2511fc_rport_final_delete(struct work_struct *work)
aedf3497 2512{
c4028958
DH		 2513 struct fc_rport *rport =
2514 container_of(work, struct fc_rport, rport_delete_work);
aedf3497
JS		 2515 struct device *dev = &rport->dev;
2516 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2517 struct fc_internal *i = to_fc_internal(shost->transportt);
92740b24 2518 unsigned long flags;
8798a694 2519 int do_callback = 0;
aedf3497 2520
112f661d
NNS		 2521 fc_terminate_rport_io(rport);
2522
aedf3497 2523 /*
9ef3e4a4 2524 * if a scan is pending, flush the SCSI Host work_q so that
aedf3497
JS		 2525 * that we can reclaim the rport scan work element.
2526 */
2527 if (rport->flags & FC_RPORT_SCAN_PENDING)
2528 scsi_flush_work(shost);
2529
92740b24
JS		 2530 /*
2531 * Cancel any outstanding timers. These should really exist
2532 * only when rmmod'ing the LLDD and we're asking for
2533 * immediate termination of the rports
2534 */
2535 spin_lock_irqsave(shost->host_lock, flags);
2536 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2537 spin_unlock_irqrestore(shost->host_lock, flags);
2538 if (!cancel_delayed_work(&rport->fail_io_work))
2539 fc_flush_devloss(shost);
2540 if (!cancel_delayed_work(&rport->dev_loss_work))
2541 fc_flush_devloss(shost);
0353e085 2542 cancel_work_sync(&rport->scan_work);
92740b24
JS		 2543 spin_lock_irqsave(shost->host_lock, flags);
2544 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2545 }
2546 spin_unlock_irqrestore(shost->host_lock, flags);
2547
0f29b966
JS		 2548 /* Delete SCSI target and sdevs */
2549 if (rport->scsi_target_id != -1)
c4028958 2550 fc_starget_delete(&rport->stgt_delete_work);
92740b24
JS		 2551
2552 /*
2553 * Notify the driver that the rport is now dead. The LLDD will
2554 * also guarantee that any communication to the rport is terminated
4be98c0c
JS		 2555 *
2556 * Avoid this call if we already called it when we preserved the
2557 * rport for the binding.
92740b24 2558 */
8798a694 2559 spin_lock_irqsave(shost->host_lock, flags);
4be98c0c 2560 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
8798a694
MR		 2561 (i->f->dev_loss_tmo_callbk)) {
2562 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2563 do_callback = 1;
2564 }
2565 spin_unlock_irqrestore(shost->host_lock, flags);
2566
2567 if (do_callback)
0f29b966 2568 i->f->dev_loss_tmo_callbk(rport);
0f29b966 2569
9e4f5e29
JS		 2570 fc_bsg_remove(rport->rqst_q);
2571
aedf3497
JS		 2572 transport_remove_device(dev);
2573 device_del(dev);
2574 transport_destroy_device(dev);
4cd38e38 2575 scsi_host_put(shost); /* for fc_host->rport list */
3bdad7bd 2576 put_device(dev); /* for self-reference */
aedf3497
JS		 2577}
2578
2579
1da177e4 2580/**
558b88fe 2581 * fc_remote_port_create - allocates and creates a remote FC port.
1da177e4
LT		 2582 * @shost: scsi host the remote port is connected to.
2583 * @channel: Channel on shost port connected to.
2584 * @ids: The world wide names, fc address, and FC4 port
2585 * roles for the remote port.
2586 *
2587 * Allocates and creates the remoter port structure, including the
2588 * class and sysfs creation.
2589 *
2590 * Notes:
2591 * This routine assumes no locks are held on entry.
eb44820c 2592 */
44818efb 2593static struct fc_rport *
558b88fe
HR		 2594fc_remote_port_create(struct Scsi_Host *shost, int channel,
2595 struct fc_rport_identifiers *ids)
1da177e4 2596{
aedf3497 2597 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2598 struct fc_internal *fci = to_fc_internal(shost->transportt);
2599 struct fc_rport *rport;
2600 struct device *dev;
2601 unsigned long flags;
2602 int error;
2603 size_t size;
2604
2605 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
24669f75 2606 rport = kzalloc(size, GFP_KERNEL);
1da177e4 2607 if (unlikely(!rport)) {
cadbd4a5 2608 printk(KERN_ERR "%s: allocation failure\n", __func__);
1da177e4
LT		 2609 return NULL;
2610 }
1da177e4
LT		 2611
2612 rport->maxframe_size = -1;
2613 rport->supported_classes = FC_COS_UNSPECIFIED;
43ca910a 2614 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
1da177e4
LT		 2615 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2616 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2617 rport->port_id = ids->port_id;
2618 rport->roles = ids->roles;
2619 rport->port_state = FC_PORTSTATE_ONLINE;
2620 if (fci->f->dd_fcrport_size)
2621 rport->dd_data = &rport[1];
2622 rport->channel = channel;
0f29b966 2623 rport->fast_io_fail_tmo = -1;
1da177e4 2624
c4028958
DH		 2625 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2626 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2627 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2628 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2629 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
1da177e4
LT		 2630
2631 spin_lock_irqsave(shost->host_lock, flags);
2632
2633 rport->number = fc_host->next_rport_number++;
0c3ae266
CA		 2634 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
2635 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
1da177e4
LT		 2636 rport->scsi_target_id = fc_host->next_target_id++;
2637 else
2638 rport->scsi_target_id = -1;
aedf3497 2639 list_add_tail(&rport->peers, &fc_host->rports);
4cd38e38 2640 scsi_host_get(shost); /* for fc_host->rport list */
1da177e4
LT		 2641
2642 spin_unlock_irqrestore(shost->host_lock, flags);
2643
2644 dev = &rport->dev;
3bdad7bd
JS		 2645 device_initialize(dev); /* takes self reference */
2646 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
1da177e4 2647 dev->release = fc_rport_dev_release;
71610f55
KS		 2648 dev_set_name(dev, "rport-%d:%d-%d",
2649 shost->host_no, channel, rport->number);
1da177e4
LT		 2650 transport_setup_device(dev);
2651
2652 error = device_add(dev);
2653 if (error) {
2654 printk(KERN_ERR "FC Remote Port device_add failed\n");
2655 goto delete_rport;
2656 }
2657 transport_add_device(dev);
2658 transport_configure_device(dev);
2659
9e4f5e29
JS		 2660 fc_bsg_rportadd(shost, rport);
2661 /* ignore any bsg add error - we just can't do sgio */
2662
a53eb5e0 2663 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
1da177e4 2664 /* initiate a scan of the target */
aedf3497 2665 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2666 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2667 }
1da177e4
LT		 2668
2669 return rport;
2670
2671delete_rport:
2672 transport_destroy_device(dev);
1da177e4
LT		 2673 spin_lock_irqsave(shost->host_lock, flags);
2674 list_del(&rport->peers);
4cd38e38 2675 scsi_host_put(shost); /* for fc_host->rport list */
1da177e4
LT		 2676 spin_unlock_irqrestore(shost->host_lock, flags);
2677 put_device(dev->parent);
2678 kfree(rport);
2679 return NULL;
2680}
2681
2682/**
eb44820c 2683 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
1da177e4
LT		 2684 * @shost: scsi host the remote port is connected to.
2685 * @channel: Channel on shost port connected to.
2686 * @ids: The world wide names, fc address, and FC4 port
2687 * roles for the remote port.
2688 *
2689 * The LLDD calls this routine to notify the transport of the existence
2690 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2691 * of the port, it's FC address (port_id), and the FC4 roles that are
2692 * active for the port.
2693 *
2694 * For ports that are FCP targets (aka scsi targets), the FC transport
2695 * maintains consistent target id bindings on behalf of the LLDD.
2696 * A consistent target id binding is an assignment of a target id to
2697 * a remote port identifier, which persists while the scsi host is
2698 * attached. The remote port can disappear, then later reappear, and
2699 * it's target id assignment remains the same. This allows for shifts
2700 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2701 * changes to the scsi subsystem which is based on scsi host number and
2702 * target id values. Bindings are only valid during the attachment of
2703 * the scsi host. If the host detaches, then later re-attaches, target
2704 * id bindings may change.
2705 *
2706 * This routine is responsible for returning a remote port structure.
2707 * The routine will search the list of remote ports it maintains
2708 * internally on behalf of consistent target id mappings. If found, the
2709 * remote port structure will be reused. Otherwise, a new remote port
2710 * structure will be allocated.
2711 *
2712 * Whenever a remote port is allocated, a new fc_remote_port class
2713 * device is created.
2714 *
2715 * Should not be called from interrupt context.
2716 *
2717 * Notes:
2718 * This routine assumes no locks are held on entry.
eb44820c 2719 */
1da177e4
LT		 2720struct fc_rport *
2721fc_remote_port_add(struct Scsi_Host *shost, int channel,
2722 struct fc_rport_identifiers *ids)
2723{
19a7b4ae 2724 struct fc_internal *fci = to_fc_internal(shost->transportt);
aedf3497 2725 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2726 struct fc_rport *rport;
2727 unsigned long flags;
2728 int match = 0;
2729
aedf3497
JS		 2730 /* ensure any stgt delete functions are done */
2731 fc_flush_work(shost);
2732
19a7b4ae
JSEC		 2733 /*
2734 * Search the list of "active" rports, for an rport that has been
2735 * deleted, but we've held off the real delete while the target
2736 * is in a "blocked" state.
2737 */
2738 spin_lock_irqsave(shost->host_lock, flags);
2739
aedf3497 2740 list_for_each_entry(rport, &fc_host->rports, peers) {
19a7b4ae 2741
f091fb8c
HR		 2742 if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
2743 rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
19a7b4ae
JSEC		 2744 (rport->channel == channel)) {
2745
aedf3497 2746 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 2747 case FC_TGTID_BIND_BY_WWPN:
2748 case FC_TGTID_BIND_NONE:
2749 if (rport->port_name == ids->port_name)
2750 match = 1;
2751 break;
2752 case FC_TGTID_BIND_BY_WWNN:
2753 if (rport->node_name == ids->node_name)
2754 match = 1;
2755 break;
2756 case FC_TGTID_BIND_BY_ID:
2757 if (rport->port_id == ids->port_id)
2758 match = 1;
2759 break;
2760 }
2761
2762 if (match) {
19a7b4ae
JSEC		 2763
2764 memcpy(&rport->node_name, &ids->node_name,
2765 sizeof(rport->node_name));
2766 memcpy(&rport->port_name, &ids->port_name,
2767 sizeof(rport->port_name));
2768 rport->port_id = ids->port_id;
2769
2770 rport->port_state = FC_PORTSTATE_ONLINE;
2771 rport->roles = ids->roles;
2772
2773 spin_unlock_irqrestore(shost->host_lock, flags);
2774
2775 if (fci->f->dd_fcrport_size)
2776 memset(rport->dd_data, 0,
2777 fci->f->dd_fcrport_size);
2778
2779 /*
92740b24
JS		 2780 * If we were not a target, cancel the
2781 * io terminate and rport timers, and
2782 * we're done.
2783 *
2784 * If we were a target, but our new role
2785 * doesn't indicate a target, leave the
2786 * timers running expecting the role to
2787 * change as the target fully logs in. If
2788 * it doesn't, the target will be torn down.
2789 *
2790 * If we were a target, and our role shows
2791 * we're still a target, cancel the timers
2792 * and kick off a scan.
19a7b4ae 2793 */
19a7b4ae 2794
92740b24
JS		 2795 /* was a target, not in roles */
2796 if ((rport->scsi_target_id != -1) &&
a53eb5e0 2797 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
92740b24 2798 return rport;
19a7b4ae
JSEC		 2799
2800 /*
92740b24
JS		 2801 * Stop the fail io and dev_loss timers.
2802 * If they flush, the port_state will
2803 * be checked and will NOOP the function.
19a7b4ae 2804 */
0f29b966
JS		 2805 if (!cancel_delayed_work(&rport->fail_io_work))
2806 fc_flush_devloss(shost);
92740b24 2807 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2808 fc_flush_devloss(shost);
2809
2810 spin_lock_irqsave(shost->host_lock, flags);
2811
fff9d40c 2812 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
4be98c0c
JS		 2813 FC_RPORT_DEVLOSS_PENDING |
2814 FC_RPORT_DEVLOSS_CALLBK_DONE);
19a7b4ae 2815
8fb2ef89
MC		 2816 spin_unlock_irqrestore(shost->host_lock, flags);
2817
92740b24
JS		 2818 /* if target, initiate a scan */
2819 if (rport->scsi_target_id != -1) {
5d9fb5cc
MC		 2820 scsi_target_unblock(&rport->dev,
2821 SDEV_RUNNING);
8fb2ef89
MC		 2822 spin_lock_irqsave(shost->host_lock,
2823 flags);
92740b24
JS		 2824 rport->flags |= FC_RPORT_SCAN_PENDING;
2825 scsi_queue_work(shost,
2826 &rport->scan_work);
2827 spin_unlock_irqrestore(shost->host_lock,
2828 flags);
8fb2ef89 2829 }
a0785edf 2830
9e4f5e29
JS		 2831 fc_bsg_goose_queue(rport);
2832
19a7b4ae
JSEC		 2833 return rport;
2834 }
2835 }
2836 }
2837
92740b24
JS		 2838 /*
2839 * Search the bindings array
2840 * Note: if never a FCP target, you won't be on this list
2841 */
aedf3497 2842 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
1da177e4
LT		 2843
2844 /* search for a matching consistent binding */
2845
aedf3497 2846 list_for_each_entry(rport, &fc_host->rport_bindings,
1da177e4
LT		 2847 peers) {
2848 if (rport->channel != channel)
2849 continue;
2850
aedf3497 2851 switch (fc_host->tgtid_bind_type) {
1da177e4
LT		 2852 case FC_TGTID_BIND_BY_WWPN:
2853 if (rport->port_name == ids->port_name)
2854 match = 1;
2855 break;
2856 case FC_TGTID_BIND_BY_WWNN:
2857 if (rport->node_name == ids->node_name)
2858 match = 1;
2859 break;
2860 case FC_TGTID_BIND_BY_ID:
2861 if (rport->port_id == ids->port_id)
2862 match = 1;
2863 break;
2864 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2865 break;
2866 }
2867
2868 if (match) {
aedf3497 2869 list_move_tail(&rport->peers, &fc_host->rports);
1da177e4
LT		 2870 break;
2871 }
2872 }
2873
1da177e4
LT		 2874 if (match) {
2875 memcpy(&rport->node_name, &ids->node_name,
2876 sizeof(rport->node_name));
2877 memcpy(&rport->port_name, &ids->port_name,
2878 sizeof(rport->port_name));
2879 rport->port_id = ids->port_id;
1da177e4 2880 rport->port_state = FC_PORTSTATE_ONLINE;
fff9d40c 2881 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 2882
19a7b4ae
JSEC		 2883 if (fci->f->dd_fcrport_size)
2884 memset(rport->dd_data, 0,
2885 fci->f->dd_fcrport_size);
8fb2ef89
MC		 2886 spin_unlock_irqrestore(shost->host_lock, flags);
2887
675195d0 2888 fc_remote_port_rolechg(rport, ids->roles);
1da177e4
LT		 2889 return rport;
2890 }
2891 }
2892
19a7b4ae
JSEC		 2893 spin_unlock_irqrestore(shost->host_lock, flags);
2894
1da177e4 2895 /* No consistent binding found - create new remote port entry */
558b88fe 2896 rport = fc_remote_port_create(shost, channel, ids);
1da177e4
LT		 2897
2898 return rport;
2899}
2900EXPORT_SYMBOL(fc_remote_port_add);
2901
1da177e4
LT		 2902
2903/**
eb44820c 2904 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
1da177e4
LT		 2905 * @rport: The remote port that no longer exists
2906 *
2907 * The LLDD calls this routine to notify the transport that a remote
2908 * port is no longer part of the topology. Note: Although a port
2909 * may no longer be part of the topology, it may persist in the remote
19a7b4ae 2910 * ports displayed by the fc_host. We do this under 2 conditions:
739aca06 2911 *
eb44820c 2912 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
739aca06
MCC		 2913 * This allows the port to temporarily disappear, then reappear without
2914 * disrupting the SCSI device tree attached to it. During the "blocked"
2915 * period the port will still exist.
2916 *
eb44820c 2917 * 2) If the port was a scsi target and disappears for longer than we
739aca06
MCC		 2918 * expect, we'll delete the port and the tear down the SCSI device tree
2919 * attached to it. However, we want to semi-persist the target id assigned
2920 * to that port if it eventually does exist. The port structure will
2921 * remain (although with minimal information) so that the target id
90311148 2922 * bindings also remain.
1da177e4
LT		 2923 *
2924 * If the remote port is not an FCP Target, it will be fully torn down
2925 * and deallocated, including the fc_remote_port class device.
2926 *
19a7b4ae
JSEC		 2927 * If the remote port is an FCP Target, the port will be placed in a
2928 * temporary blocked state. From the LLDD's perspective, the rport no
2929 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2930 * exists, but all sdevs on it are blocked from further I/O. The following
eb44820c
RL		 2931 * is then expected.
2932 *
19a7b4ae
JSEC		 2933 * If the remote port does not return (signaled by a LLDD call to
2934 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2935 * scsi target is removed - killing all outstanding i/o and removing the
134699d2 2936 * scsi devices attached to it. The port structure will be marked Not
19a7b4ae
JSEC		 2937 * Present and be partially cleared, leaving only enough information to
2938 * recognize the remote port relative to the scsi target id binding if
2939 * it later appears. The port will remain as long as there is a valid
2940 * binding (e.g. until the user changes the binding type or unloads the
2941 * scsi host with the binding).
1da177e4 2942 *
19a7b4ae
JSEC		 2943 * If the remote port returns within the dev_loss_tmo value (and matches
2944 * according to the target id binding type), the port structure will be
2945 * reused. If it is no longer a SCSI target, the target will be torn
2946 * down. If it continues to be a SCSI target, then the target will be
2947 * unblocked (allowing i/o to be resumed), and a scan will be activated
2948 * to ensure that all luns are detected.
2949 *
2950 * Called from normal process context only - cannot be called from interrupt.
1da177e4
LT		 2951 *
2952 * Notes:
2953 * This routine assumes no locks are held on entry.
eb44820c 2954 */
1da177e4
LT		 2955void
2956fc_remote_port_delete(struct fc_rport *rport)
2957{
aedf3497 2958 struct Scsi_Host *shost = rport_to_shost(rport);
36dd288f 2959 unsigned long timeout = rport->dev_loss_tmo;
aedf3497
JS		 2960 unsigned long flags;
2961
2962 /*
2963 * No need to flush the fc_host work_q's, as all adds are synchronous.
2964 *
2965 * We do need to reclaim the rport scan work element, so eventually
2966 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2967 * there's still a scan pending.
2968 */
2969
2970 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2971
92740b24 2972 if (rport->port_state != FC_PORTSTATE_ONLINE) {
aedf3497 2973 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2974 return;
2975 }
2976
92740b24
JS		 2977 /*
2978 * In the past, we if this was not an FCP-Target, we would
2979 * unconditionally just jump to deleting the rport.
2980 * However, rports can be used as node containers by the LLDD,
2981 * and its not appropriate to just terminate the rport at the
2982 * first sign of a loss in connectivity. The LLDD may want to
2983 * send ELS traffic to re-validate the login. If the rport is
2984 * immediately deleted, it makes it inappropriate for a node
2985 * container.
2986 * So... we now unconditionally wait dev_loss_tmo before
2987 * destroying an rport.
2988 */
2989
aedf3497
JS		 2990 rport->port_state = FC_PORTSTATE_BLOCKED;
2991
2992 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2993
2994 spin_unlock_irqrestore(shost->host_lock, flags);
2995
19a7b4ae 2996 scsi_target_block(&rport->dev);
1da177e4 2997
0f29b966
JS		 2998 /* see if we need to kill io faster than waiting for device loss */
2999 if ((rport->fast_io_fail_tmo != -1) &&
fff9d40c 3000 (rport->fast_io_fail_tmo < timeout))
0f29b966
JS		 3001 fc_queue_devloss_work(shost, &rport->fail_io_work,
3002 rport->fast_io_fail_tmo * HZ);
3003
19a7b4ae 3004 /* cap the length the devices can be blocked until they are deleted */
aedf3497 3005 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
1da177e4
LT		 3006}
3007EXPORT_SYMBOL(fc_remote_port_delete);
3008
3009/**
eb44820c 3010 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
1da177e4 3011 * @rport: The remote port that changed.
eb44820c 3012 * @roles: New roles for this port.
1da177e4 3013 *
eb44820c
RL		 3014 * Description: The LLDD calls this routine to notify the transport that the
3015 * roles on a remote port may have changed. The largest effect of this is
1da177e4
LT		 3016 * if a port now becomes a FCP Target, it must be allocated a
3017 * scsi target id. If the port is no longer a FCP target, any
3018 * scsi target id value assigned to it will persist in case the
3019 * role changes back to include FCP Target. No changes in the scsi
3020 * midlayer will be invoked if the role changes (in the expectation
3021 * that the role will be resumed. If it doesn't normal error processing
3022 * will take place).
3023 *
3024 * Should not be called from interrupt context.
3025 *
3026 * Notes:
3027 * This routine assumes no locks are held on entry.
eb44820c 3028 */
1da177e4
LT		 3029void
3030fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3031{
3032 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 3033 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 3034 unsigned long flags;
3035 int create = 0;
3036
1da177e4 3037 spin_lock_irqsave(shost->host_lock, flags);
a53eb5e0 3038 if (roles & FC_PORT_ROLE_FCP_TARGET) {
19a7b4ae
JSEC		 3039 if (rport->scsi_target_id == -1) {
3040 rport->scsi_target_id = fc_host->next_target_id++;
3041 create = 1;
a53eb5e0 3042 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
19a7b4ae 3043 create = 1;
1da177e4 3044 }
1da177e4 3045
19a7b4ae
JSEC		 3046 rport->roles = roles;
3047
aedf3497
JS		 3048 spin_unlock_irqrestore(shost->host_lock, flags);
3049
19a7b4ae
JSEC		 3050 if (create) {
3051 /*
3052 * There may have been a delete timer running on the
3053 * port. Ensure that it is cancelled as we now know
3054 * the port is an FCP Target.
134699d2 3055 * Note: we know the rport exists and is in an online
19a7b4ae
JSEC		 3056 * state as the LLDD would not have had an rport
3057 * reference to pass us.
3058 *
3059 * Take no action on the del_timer failure as the state
3060 * machine state change will validate the
3061 * transaction.
3062 */
0f29b966
JS		 3063 if (!cancel_delayed_work(&rport->fail_io_work))
3064 fc_flush_devloss(shost);
19a7b4ae 3065 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 3066 fc_flush_devloss(shost);
3067
3068 spin_lock_irqsave(shost->host_lock, flags);
fff9d40c 3069 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
0eecee41
JS		 3070 FC_RPORT_DEVLOSS_PENDING |
3071 FC_RPORT_DEVLOSS_CALLBK_DONE);
aedf3497
JS		 3072 spin_unlock_irqrestore(shost->host_lock, flags);
3073
3074 /* ensure any stgt delete functions are done */
3075 fc_flush_work(shost);
19a7b4ae 3076
5d9fb5cc 3077 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
1da177e4 3078 /* initiate a scan of the target */
aedf3497
JS		 3079 spin_lock_irqsave(shost->host_lock, flags);
3080 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 3081 scsi_queue_work(shost, &rport->scan_work);
aedf3497 3082 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae 3083 }
1da177e4
LT		 3084}
3085EXPORT_SYMBOL(fc_remote_port_rolechg);
3086
3087/**
eb44820c 3088 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
92740b24 3089 * @work: rport target that failed to reappear in the allotted time.
eb44820c
RL		 3090 *
3091 * Description: An attempt to delete a remote port blocks, and if it fails
3092 * to return in the allotted time this gets called.
3093 */
1da177e4 3094static void
c4028958 3095fc_timeout_deleted_rport(struct work_struct *work)
1da177e4 3096{
c4028958
DH		 3097 struct fc_rport *rport =
3098 container_of(work, struct fc_rport, dev_loss_work.work);
19a7b4ae 3099 struct Scsi_Host *shost = rport_to_shost(rport);
4be98c0c 3100 struct fc_internal *i = to_fc_internal(shost->transportt);
aedf3497 3101 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
19a7b4ae 3102 unsigned long flags;
8798a694 3103 int do_callback = 0;
1da177e4 3104
19a7b4ae 3105 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 3106
aedf3497
JS		 3107 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3108
1da177e4 3109 /*
92740b24
JS		 3110 * If the port is ONLINE, then it came back. If it was a SCSI
3111 * target, validate it still is. If not, tear down the
3112 * scsi_target on it.
1da177e4 3113 */
aedf3497 3114 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
92740b24 3115 (rport->scsi_target_id != -1) &&
a53eb5e0 3116 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
19a7b4ae 3117 dev_printk(KERN_ERR, &rport->dev,
aedf3497
JS		 3118 "blocked FC remote port time out: no longer"
3119 " a FCP target, removing starget\n");
aedf3497 3120 spin_unlock_irqrestore(shost->host_lock, flags);
5d9fb5cc 3121 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
a0785edf 3122 fc_queue_work(shost, &rport->stgt_delete_work);
19a7b4ae
JSEC		 3123 return;
3124 }
1da177e4 3125
92740b24 3126 /* NOOP state - we're flushing workq's */
19a7b4ae
JSEC		 3127 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3128 spin_unlock_irqrestore(shost->host_lock, flags);
3129 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3130 "blocked FC remote port time out: leaving"
3131 " rport%s alone\n",
3132 (rport->scsi_target_id != -1) ? " and starget" : "");
19a7b4ae
JSEC		 3133 return;
3134 }
1da177e4 3135
92740b24
JS		 3136 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3137 (rport->scsi_target_id == -1)) {
aedf3497
JS		 3138 list_del(&rport->peers);
3139 rport->port_state = FC_PORTSTATE_DELETED;
19a7b4ae 3140 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3141 "blocked FC remote port time out: removing"
3142 " rport%s\n",
3143 (rport->scsi_target_id != -1) ? " and starget" : "");
aedf3497
JS		 3144 fc_queue_work(shost, &rport->rport_delete_work);
3145 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC		 3146 return;
3147 }
1da177e4 3148
19a7b4ae
JSEC		 3149 dev_printk(KERN_ERR, &rport->dev,
3150 "blocked FC remote port time out: removing target and "
3151 "saving binding\n");
3152
aedf3497 3153 list_move_tail(&rport->peers, &fc_host->rport_bindings);
1da177e4
LT		 3154
3155 /*
19a7b4ae
JSEC		 3156 * Note: We do not remove or clear the hostdata area. This allows
3157 * host-specific target data to persist along with the
3158 * scsi_target_id. It's up to the host to manage it's hostdata area.
1da177e4 3159 */
1da177e4 3160
19a7b4ae
JSEC		 3161 /*
3162 * Reinitialize port attributes that may change if the port comes back.
3163 */
3164 rport->maxframe_size = -1;
3165 rport->supported_classes = FC_COS_UNSPECIFIED;
a53eb5e0 3166 rport->roles = FC_PORT_ROLE_UNKNOWN;
aedf3497 3167 rport->port_state = FC_PORTSTATE_NOTPRESENT;
fff9d40c 3168 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 3169
f78badb1
JS		 3170 /*
3171 * Pre-emptively kill I/O rather than waiting for the work queue
3172 * item to teardown the starget. (FCOE libFC folks prefer this
3173 * and to have the rport_port_id still set when it's done).
3174 */
3175 spin_unlock_irqrestore(shost->host_lock, flags);
3176 fc_terminate_rport_io(rport);
3177
8798a694
MR		 3178 spin_lock_irqsave(shost->host_lock, flags);
3179
3180 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
f78badb1 3181
8798a694
MR		 3182 /* remove the identifiers that aren't used in the consisting binding */
3183 switch (fc_host->tgtid_bind_type) {
3184 case FC_TGTID_BIND_BY_WWPN:
3185 rport->node_name = -1;
3186 rport->port_id = -1;
3187 break;
3188 case FC_TGTID_BIND_BY_WWNN:
3189 rport->port_name = -1;
3190 rport->port_id = -1;
3191 break;
3192 case FC_TGTID_BIND_BY_ID:
3193 rport->node_name = -1;
3194 rport->port_name = -1;
3195 break;
3196 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3197 break;
3198 }
3199
3200 /*
3201 * As this only occurs if the remote port (scsi target)
3202 * went away and didn't come back - we'll remove
3203 * all attached scsi devices.
3204 */
3205 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3206 fc_queue_work(shost, &rport->stgt_delete_work);
3207
3208 do_callback = 1;
19a7b4ae
JSEC		 3209 }
3210
8798a694 3211 spin_unlock_irqrestore(shost->host_lock, flags);
4be98c0c
JS		 3212
3213 /*
3214 * Notify the driver that the rport is now dead. The LLDD will
3215 * also guarantee that any communication to the rport is terminated
3216 *
3217 * Note: we set the CALLBK_DONE flag above to correspond
3218 */
8798a694 3219 if (do_callback && i->f->dev_loss_tmo_callbk)
4be98c0c 3220 i->f->dev_loss_tmo_callbk(rport);
1da177e4 3221}
1da177e4 3222
4be98c0c 3223
0f29b966 3224/**
eb44820c 3225 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
c4028958 3226 * @work: rport to terminate io on.
0f29b966
JS		 3227 *
3228 * Notes: Only requests the failure of the io, not that all are flushed
3229 * prior to returning.
eb44820c 3230 */
0f29b966 3231static void
c4028958 3232fc_timeout_fail_rport_io(struct work_struct *work)
0f29b966 3233{
c4028958
DH		 3234 struct fc_rport *rport =
3235 container_of(work, struct fc_rport, fail_io_work.work);
0f29b966
JS		 3236
3237 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3238 return;
3239
fff9d40c
MC		 3240 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3241 fc_terminate_rport_io(rport);
0f29b966
JS		 3242}
3243
1da177e4
LT		 3244/**
3245 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
c4028958 3246 * @work: remote port to be scanned.
eb44820c 3247 */
1da177e4 3248static void
c4028958 3249fc_scsi_scan_rport(struct work_struct *work)
1da177e4 3250{
c4028958
DH		 3251 struct fc_rport *rport =
3252 container_of(work, struct fc_rport, scan_work);
aedf3497 3253 struct Scsi_Host *shost = rport_to_shost(rport);
03f002f7 3254 struct fc_internal *i = to_fc_internal(shost->transportt);
42e33148
JSEC		 3255 unsigned long flags;
3256
aedf3497 3257 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
03f002f7
CS		 3258 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3259 !(i->f->disable_target_scan)) {
aedf3497 3260 scsi_scan_target(&rport->dev, rport->channel,
1d645088
HR		 3261 rport->scsi_target_id, SCAN_WILD_CARD,
3262 SCSI_SCAN_RESCAN);
42e33148 3263 }
aedf3497
JS		 3264
3265 spin_lock_irqsave(shost->host_lock, flags);
3266 rport->flags &= ~FC_RPORT_SCAN_PENDING;
42e33148
JSEC		 3267 spin_unlock_irqrestore(shost->host_lock, flags);
3268}
3269
65d430fa 3270/**
67b46525
SM		 3271 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
3272 * @rport: Remote port that scsi_eh is trying to recover.
65d430fa
CS		 3273 *
3274 * This routine can be called from a FC LLD scsi_eh callback. It
3275 * blocks the scsi_eh thread until the fc_rport leaves the
2f2eb587
CS		 3276 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3277 * necessary to avoid the scsi_eh failing recovery actions for blocked
3278 * rports which would lead to offlined SCSI devices.
3279 *
3280 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3281 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3282 * passed back to scsi_eh.
65d430fa 3283 */
67b46525 3284int fc_block_rport(struct fc_rport *rport)
65d430fa 3285{
67b46525 3286 struct Scsi_Host *shost = rport_to_shost(rport);
65d430fa
CS		 3287 unsigned long flags;
3288
3289 spin_lock_irqsave(shost->host_lock, flags);
2f2eb587
CS		 3290 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3291 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
65d430fa
CS		 3292 spin_unlock_irqrestore(shost->host_lock, flags);
3293 msleep(1000);
3294 spin_lock_irqsave(shost->host_lock, flags);
3295 }
3296 spin_unlock_irqrestore(shost->host_lock, flags);
2f2eb587
CS		 3297
3298 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3299 return FAST_IO_FAIL;
3300
3301 return 0;
65d430fa 3302}
67b46525
SM		 3303EXPORT_SYMBOL(fc_block_rport);
3304
3305/**
3306 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3307 * @cmnd: SCSI command that scsi_eh is trying to recover
3308 *
3309 * This routine can be called from a FC LLD scsi_eh callback. It
3310 * blocks the scsi_eh thread until the fc_rport leaves the
3311 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3312 * necessary to avoid the scsi_eh failing recovery actions for blocked
3313 * rports which would lead to offlined SCSI devices.
3314 *
3315 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3316 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3317 * passed back to scsi_eh.
3318 */
3319int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3320{
3321 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3322
3323 return fc_block_rport(rport);
3324}
65d430fa 3325EXPORT_SYMBOL(fc_block_scsi_eh);
42e33148 3326
a53eb5e0 3327/**
a30c3f69 3328 * fc_vport_setup - allocates and creates a FC virtual port.
a53eb5e0
JS		 3329 * @shost: scsi host the virtual port is connected to.
3330 * @channel: Channel on shost port connected to.
3331 * @pdev: parent device for vport
3332 * @ids: The world wide names, FC4 port roles, etc for
3333 * the virtual port.
3334 * @ret_vport: The pointer to the created vport.
3335 *
3336 * Allocates and creates the vport structure, calls the parent host
134699d2 3337 * to instantiate the vport, this completes w/ class and sysfs creation.
a53eb5e0
JS		 3338 *
3339 * Notes:
3340 * This routine assumes no locks are held on entry.
eb44820c 3341 */
a53eb5e0 3342static int
a30c3f69 3343fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
a53eb5e0
JS		 3344 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3345{
3346 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3347 struct fc_internal *fci = to_fc_internal(shost->transportt);
3348 struct fc_vport *vport;
3349 struct device *dev;
3350 unsigned long flags;
3351 size_t size;
3352 int error;
3353
3354 *ret_vport = NULL;
3355
3356 if ( ! fci->f->vport_create)
3357 return -ENOENT;
3358
3359 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3360 vport = kzalloc(size, GFP_KERNEL);
3361 if (unlikely(!vport)) {
cadbd4a5 3362 printk(KERN_ERR "%s: allocation failure\n", __func__);
a53eb5e0
JS		 3363 return -ENOMEM;
3364 }
3365
3366 vport->vport_state = FC_VPORT_UNKNOWN;
3367 vport->vport_last_state = FC_VPORT_UNKNOWN;
3368 vport->node_name = ids->node_name;
3369 vport->port_name = ids->port_name;
3370 vport->roles = ids->roles;
3371 vport->vport_type = ids->vport_type;
3372 if (fci->f->dd_fcvport_size)
3373 vport->dd_data = &vport[1];
3374 vport->shost = shost;
3375 vport->channel = channel;
3376 vport->flags = FC_VPORT_CREATING;
9ef3e4a4 3377 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
a53eb5e0
JS		 3378
3379 spin_lock_irqsave(shost->host_lock, flags);
3380
3381 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3382 spin_unlock_irqrestore(shost->host_lock, flags);
3383 kfree(vport);
3384 return -ENOSPC;
3385 }
3386 fc_host->npiv_vports_inuse++;
3387 vport->number = fc_host->next_vport_number++;
3388 list_add_tail(&vport->peers, &fc_host->vports);
4cd38e38 3389 scsi_host_get(shost); /* for fc_host->vport list */
a53eb5e0
JS		 3390
3391 spin_unlock_irqrestore(shost->host_lock, flags);
3392
3393 dev = &vport->dev;
3394 device_initialize(dev); /* takes self reference */
3395 dev->parent = get_device(pdev); /* takes parent reference */
3396 dev->release = fc_vport_dev_release;
71610f55
KS		 3397 dev_set_name(dev, "vport-%d:%d-%d",
3398 shost->host_no, channel, vport->number);
a53eb5e0
JS		 3399 transport_setup_device(dev);
3400
3401 error = device_add(dev);
3402 if (error) {
3403 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3404 goto delete_vport;
3405 }
3406 transport_add_device(dev);
3407 transport_configure_device(dev);
3408
3409 error = fci->f->vport_create(vport, ids->disable);
3410 if (error) {
3411 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3412 goto delete_vport_all;
3413 }
3414
3415 /*
3416 * if the parent isn't the physical adapter's Scsi_Host, ensure
134699d2 3417 * the Scsi_Host at least contains a symlink to the vport.
a53eb5e0
JS		 3418 */
3419 if (pdev != &shost->shost_gendev) {
3420 error = sysfs_create_link(&shost->shost_gendev.kobj,
71610f55 3421 &dev->kobj, dev_name(dev));
a53eb5e0
JS		 3422 if (error)
3423 printk(KERN_ERR
3424 "%s: Cannot create vport symlinks for "
3425 "%s, err=%d\n",
71610f55 3426 __func__, dev_name(dev), error);
a53eb5e0
JS		 3427 }
3428 spin_lock_irqsave(shost->host_lock, flags);
3429 vport->flags &= ~FC_VPORT_CREATING;
3430 spin_unlock_irqrestore(shost->host_lock, flags);
3431
3432 dev_printk(KERN_NOTICE, pdev,
71610f55 3433 "%s created via shost%d channel %d\n", dev_name(dev),
a53eb5e0
JS		 3434 shost->host_no, channel);
3435
3436 *ret_vport = vport;
3437
3438 return 0;
3439
3440delete_vport_all:
3441 transport_remove_device(dev);
3442 device_del(dev);
3443delete_vport:
3444 transport_destroy_device(dev);
3445 spin_lock_irqsave(shost->host_lock, flags);
3446 list_del(&vport->peers);
4cd38e38 3447 scsi_host_put(shost); /* for fc_host->vport list */
a53eb5e0
JS		 3448 fc_host->npiv_vports_inuse--;
3449 spin_unlock_irqrestore(shost->host_lock, flags);
3450 put_device(dev->parent);
3451 kfree(vport);
3452
3453 return error;
3454}
3455
a30c3f69
AV		 3456/**
3457 * fc_vport_create - Admin App or LLDD requests creation of a vport
3458 * @shost: scsi host the virtual port is connected to.
3459 * @channel: channel on shost port connected to.
3460 * @ids: The world wide names, FC4 port roles, etc for
3461 * the virtual port.
3462 *
3463 * Notes:
3464 * This routine assumes no locks are held on entry.
3465 */
3466struct fc_vport *
3467fc_vport_create(struct Scsi_Host *shost, int channel,
3468 struct fc_vport_identifiers *ids)
3469{
3470 int stat;
3471 struct fc_vport *vport;
3472
3473 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3474 ids, &vport);
3475 return stat ? NULL : vport;
3476}
3477EXPORT_SYMBOL(fc_vport_create);
a53eb5e0
JS		 3478
3479/**
3480 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3481 * @vport: fc_vport to be terminated
3482 *
3483 * Calls the LLDD vport_delete() function, then deallocates and removes
3484 * the vport from the shost and object tree.
3485 *
3486 * Notes:
3487 * This routine assumes no locks are held on entry.
eb44820c 3488 */
a53eb5e0
JS		 3489int
3490fc_vport_terminate(struct fc_vport *vport)
3491{
3492 struct Scsi_Host *shost = vport_to_shost(vport);
3493 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3494 struct fc_internal *i = to_fc_internal(shost->transportt);
3495 struct device *dev = &vport->dev;
3496 unsigned long flags;
3497 int stat;
3498
a53eb5e0
JS		 3499 if (i->f->vport_delete)
3500 stat = i->f->vport_delete(vport);
3501 else
3502 stat = -ENOENT;
3503
3504 spin_lock_irqsave(shost->host_lock, flags);
3505 vport->flags &= ~FC_VPORT_DELETING;
3506 if (!stat) {
3507 vport->flags |= FC_VPORT_DELETED;
3508 list_del(&vport->peers);
3509 fc_host->npiv_vports_inuse--;
4cd38e38 3510 scsi_host_put(shost); /* for fc_host->vport list */
a53eb5e0
JS		 3511 }
3512 spin_unlock_irqrestore(shost->host_lock, flags);
3513
3514 if (stat)
3515 return stat;
3516
3517 if (dev->parent != &shost->shost_gendev)
71610f55 3518 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
a53eb5e0
JS		 3519 transport_remove_device(dev);
3520 device_del(dev);
3521 transport_destroy_device(dev);
3522
3523 /*
3524 * Removing our self-reference should mean our
3525 * release function gets called, which will drop the remaining
3526 * parent reference and free the data structure.
3527 */
3528 put_device(dev); /* for self-reference */
3529
3530 return 0; /* SUCCESS */
3531}
3532EXPORT_SYMBOL(fc_vport_terminate);
3533
9ef3e4a4
JS		 3534/**
3535 * fc_vport_sched_delete - workq-based delete request for a vport
9ef3e4a4 3536 * @work: vport to be deleted.
eb44820c 3537 */
9ef3e4a4
JS		 3538static void
3539fc_vport_sched_delete(struct work_struct *work)
3540{
3541 struct fc_vport *vport =
3542 container_of(work, struct fc_vport, vport_delete_work);
3543 int stat;
3544
3545 stat = fc_vport_terminate(vport);
3546 if (stat)
3547 dev_printk(KERN_ERR, vport->dev.parent,
3548 "%s: %s could not be deleted created via "
cadbd4a5 3549 "shost%d channel %d - error %d\n", __func__,
71610f55 3550 dev_name(&vport->dev), vport->shost->host_no,
9ef3e4a4
JS		 3551 vport->channel, stat);
3552}
3553
a53eb5e0 3554
9e4f5e29
JS		 3555/*
3556 * BSG support
3557 */
3558
9e4f5e29
JS		 3559/**
3560 * fc_bsg_job_timeout - handler for when a bsg request timesout
3561 * @req: request that timed out
3562 */
3563static enum blk_eh_timer_return
3564fc_bsg_job_timeout(struct request *req)
3565{
b468b6a4 3566 struct bsg_job *job = blk_mq_rq_to_pdu(req);
cd21c605 3567 struct Scsi_Host *shost = fc_bsg_to_shost(job);
1d69b122 3568 struct fc_rport *rport = fc_bsg_to_rport(job);
9e4f5e29 3569 struct fc_internal *i = to_fc_internal(shost->transportt);
ad7660cc 3570 int err = 0, inflight = 0;
9e4f5e29 3571
1d69b122 3572 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
9e4f5e29
JS		 3573 return BLK_EH_RESET_TIMER;
3574
fb6f7c8d 3575 inflight = bsg_job_get(job);
9e4f5e29 3576
ad7660cc 3577 if (inflight && i->f->bsg_timeout) {
9e4f5e29
JS		 3578 /* call LLDD to abort the i/o as it has timed out */
3579 err = i->f->bsg_timeout(job);
b8f08645 3580 if (err == -EAGAIN) {
fb6f7c8d 3581 bsg_job_put(job);
b8f08645
SS		 3582 return BLK_EH_RESET_TIMER;
3583 } else if (err)
9e4f5e29
JS		 3584 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3585 "abort failed with status %d\n", err);
3586 }
3587
9e4f5e29 3588 /* the blk_end_sync_io() doesn't check the error */
ad7660cc 3589 if (!inflight)
47e7e89e
GM		 3590 return BLK_EH_NOT_HANDLED;
3591 else
3592 return BLK_EH_HANDLED;
9e4f5e29
JS		 3593}
3594
9e4f5e29
JS		 3595/**
3596 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3597 * @shost: scsi host rport attached to
3598 * @job: bsg job to be processed
3599 */
a0f4bd7f 3600static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
9e4f5e29
JS		 3601{
3602 struct fc_internal *i = to_fc_internal(shost->transportt);
01e0e15c
JT		 3603 struct fc_bsg_request *bsg_request = job->request;
3604 struct fc_bsg_reply *bsg_reply = job->reply;
9e4f5e29
JS		 3605 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3606 int ret;
3607
01e0e15c
JT		 3608 /* check if we really have all the request data needed */
3609 if (job->request_len < cmdlen) {
3610 ret = -ENOMSG;
3611 goto fail_host_msg;
3612 }
3613
9e4f5e29 3614 /* Validate the host command */
01e0e15c 3615 switch (bsg_request->msgcode) {
9e4f5e29
JS		 3616 case FC_BSG_HST_ADD_RPORT:
3617 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3618 break;
3619
3620 case FC_BSG_HST_DEL_RPORT:
3621 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3622 break;
3623
3624 case FC_BSG_HST_ELS_NOLOGIN:
3625 cmdlen += sizeof(struct fc_bsg_host_els);
3626 /* there better be a xmt and rcv payloads */
3627 if ((!job->request_payload.payload_len) ||
3628 (!job->reply_payload.payload_len)) {
3629 ret = -EINVAL;
3630 goto fail_host_msg;
3631 }
3632 break;
3633
3634 case FC_BSG_HST_CT:
3635 cmdlen += sizeof(struct fc_bsg_host_ct);
3636 /* there better be xmt and rcv payloads */
3637 if ((!job->request_payload.payload_len) ||
3638 (!job->reply_payload.payload_len)) {
3639 ret = -EINVAL;
3640 goto fail_host_msg;
3641 }
3642 break;
3643
3644 case FC_BSG_HST_VENDOR:
3645 cmdlen += sizeof(struct fc_bsg_host_vendor);
3646 if ((shost->hostt->vendor_id == 0L) ||
01e0e15c 3647 (bsg_request->rqst_data.h_vendor.vendor_id !=
9e4f5e29
JS		 3648 shost->hostt->vendor_id)) {
3649 ret = -ESRCH;
3650 goto fail_host_msg;
3651 }
3652 break;
3653
3654 default:
3655 ret = -EBADR;
3656 goto fail_host_msg;
3657 }
3658
9e4f5e29
JS		 3659 ret = i->f->bsg_request(job);
3660 if (!ret)
a0f4bd7f 3661 return 0;
9e4f5e29
JS		 3662
3663fail_host_msg:
3664 /* return the errno failure code as the only status */
3665 BUG_ON(job->reply_len < sizeof(uint32_t));
01e0e15c
JT		 3666 bsg_reply->reply_payload_rcv_len = 0;
3667 bsg_reply->result = ret;
9e4f5e29 3668 job->reply_len = sizeof(uint32_t);
06548160 3669 bsg_job_done(job, bsg_reply->result,
1abaede7 3670 bsg_reply->reply_payload_rcv_len);
a0f4bd7f 3671 return 0;
9e4f5e29
JS		 3672}
3673
3674
3675/*
3676 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3677 * @rport: rport to be restarted
3678 */
3679static void
3680fc_bsg_goose_queue(struct fc_rport *rport)
3681{
378eeade
BVA		 3682 struct request_queue *q = rport->rqst_q;
3683 unsigned long flags;
3684
3685 if (!q)
9e4f5e29
JS		 3686 return;
3687
378eeade
BVA		 3688 spin_lock_irqsave(q->queue_lock, flags);
3689 blk_run_queue_async(q);
3690 spin_unlock_irqrestore(q->queue_lock, flags);
9e4f5e29
JS		 3691}
3692
9e4f5e29
JS		 3693/**
3694 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3695 * @shost: scsi host rport attached to
9e4f5e29
JS		 3696 * @job: bsg job to be processed
3697 */
a0f4bd7f 3698static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
9e4f5e29
JS		 3699{
3700 struct fc_internal *i = to_fc_internal(shost->transportt);
01e0e15c
JT		 3701 struct fc_bsg_request *bsg_request = job->request;
3702 struct fc_bsg_reply *bsg_reply = job->reply;
9e4f5e29
JS		 3703 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3704 int ret;
3705
01e0e15c
JT		 3706 /* check if we really have all the request data needed */
3707 if (job->request_len < cmdlen) {
3708 ret = -ENOMSG;
3709 goto fail_rport_msg;
3710 }
3711
9e4f5e29 3712 /* Validate the rport command */
01e0e15c 3713 switch (bsg_request->msgcode) {
9e4f5e29
JS		 3714 case FC_BSG_RPT_ELS:
3715 cmdlen += sizeof(struct fc_bsg_rport_els);
3716 goto check_bidi;
3717
3718 case FC_BSG_RPT_CT:
3719 cmdlen += sizeof(struct fc_bsg_rport_ct);
3720check_bidi:
3721 /* there better be xmt and rcv payloads */
3722 if ((!job->request_payload.payload_len) ||
3723 (!job->reply_payload.payload_len)) {
3724 ret = -EINVAL;
3725 goto fail_rport_msg;
3726 }
3727 break;
3728 default:
3729 ret = -EBADR;
3730 goto fail_rport_msg;
3731 }
3732
9e4f5e29
JS		 3733 ret = i->f->bsg_request(job);
3734 if (!ret)
a0f4bd7f 3735 return 0;
9e4f5e29
JS		 3736
3737fail_rport_msg:
3738 /* return the errno failure code as the only status */
3739 BUG_ON(job->reply_len < sizeof(uint32_t));
01e0e15c
JT		 3740 bsg_reply->reply_payload_rcv_len = 0;
3741 bsg_reply->result = ret;
9e4f5e29 3742 job->reply_len = sizeof(uint32_t);
06548160 3743 bsg_job_done(job, bsg_reply->result,
1abaede7 3744 bsg_reply->reply_payload_rcv_len);
a0f4bd7f 3745 return 0;
9e4f5e29
JS		 3746}
3747
a0f4bd7f 3748static int fc_bsg_dispatch(struct bsg_job *job)
9e4f5e29 3749{
a0f4bd7f 3750 struct Scsi_Host *shost = fc_bsg_to_shost(job);
9e4f5e29 3751
a0f4bd7f
JT		 3752 if (scsi_is_fc_rport(job->dev))
3753 return fc_bsg_rport_dispatch(shost, job);
3754 else
3755 return fc_bsg_host_dispatch(shost, job);
9e4f5e29
JS		 3756}
3757
9e4f5e29
JS		 3758/**
3759 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3760 * @shost: shost for fc_host
3761 * @fc_host: fc_host adding the structures to
3762 */
3763static int
3764fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3765{
3766 struct device *dev = &shost->shost_gendev;
3767 struct fc_internal *i = to_fc_internal(shost->transportt);
3768 struct request_queue *q;
3c559ea8 3769 char bsg_name[20];
9e4f5e29
JS		 3770
3771 fc_host->rqst_q = NULL;
3772
3773 if (!i->f->bsg_request)
3774 return -ENOTSUPP;
3775
3776 snprintf(bsg_name, sizeof(bsg_name),
3777 "fc_host%d", shost->host_no);
3778
c1225f01
CH		 3779 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, i->f->dd_bsg_size,
3780 NULL);
8ae94eb6 3781 if (IS_ERR(q)) {
a0f4bd7f
JT		 3782 dev_err(dev,
3783 "fc_host%d: bsg interface failed to initialize - setup queue\n",
3784 shost->host_no);
8ae94eb6 3785 return PTR_ERR(q);
9e4f5e29 3786 }
8ae94eb6 3787 __scsi_init_queue(shost, q);
a0f4bd7f
JT		 3788 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3789 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
9e4f5e29
JS		 3790 fc_host->rqst_q = q;
3791 return 0;
3792}
3793
a0f4bd7f
JT		 3794static int fc_bsg_rport_prep(struct request_queue *q, struct request *req)
3795{
3796 struct fc_rport *rport = dev_to_rport(q->queuedata);
3797
3798 if (rport->port_state == FC_PORTSTATE_BLOCKED &&
3799 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3800 return BLKPREP_DEFER;
3801
3802 if (rport->port_state != FC_PORTSTATE_ONLINE)
3803 return BLKPREP_KILL;
3804
3805 return BLKPREP_OK;
3806}
9e4f5e29
JS		 3807
3808/**
3809 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3810 * @shost: shost that rport is attached to
3811 * @rport: rport that the bsg hooks are being attached to
3812 */
3813static int
3814fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3815{
3816 struct device *dev = &rport->dev;
3817 struct fc_internal *i = to_fc_internal(shost->transportt);
3818 struct request_queue *q;
9e4f5e29
JS		 3819
3820 rport->rqst_q = NULL;
3821
3822 if (!i->f->bsg_request)
3823 return -ENOTSUPP;
3824
c1225f01
CH		 3825 q = bsg_setup_queue(dev, NULL, fc_bsg_dispatch, i->f->dd_bsg_size,
3826 NULL);
8ae94eb6 3827 if (IS_ERR(q)) {
a0f4bd7f 3828 dev_err(dev, "failed to setup bsg queue\n");
8ae94eb6 3829 return PTR_ERR(q);
9e4f5e29 3830 }
8ae94eb6 3831 __scsi_init_queue(shost, q);
a0f4bd7f
JT		 3832 blk_queue_prep_rq(q, fc_bsg_rport_prep);
3833 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3834 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
9e4f5e29
JS		 3835 rport->rqst_q = q;
3836 return 0;
3837}
3838
3839
3840/**
3841 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3842 * @q: the request_queue that is to be torn down.
78d16341
JS		 3843 *
3844 * Notes:
3845 * Before unregistering the queue empty any requests that are blocked
3846 *
3847 *
9e4f5e29
JS		 3848 */
3849static void
3850fc_bsg_remove(struct request_queue *q)
3851{
3852 if (q) {
3853 bsg_unregister_queue(q);
3854 blk_cleanup_queue(q);
3855 }
3856}
3857
3858
9ef3e4a4
JS		 3859/* Original Author: Martin Hicks */
3860MODULE_AUTHOR("James Smart");
1da177e4
LT		 3861MODULE_DESCRIPTION("FC Transport Attributes");
3862MODULE_LICENSE("GPL");
3863
3864module_init(fc_transport_init);
3865module_exit(fc_transport_exit);
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