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Merge branches 'for-4.11/upstream-fixes', 'for-4.12/accutouch', 'for-4.12/cp2112...
[mirror_ubuntu-artful-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
JS		 291} fc_port_role_names[] = {
292 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
293 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
294 { FC_PORT_ROLE_IP_PORT, "IP Port" },
1da177e4 295};
a53eb5e0 296fc_bitfield_name_search(port_roles, fc_port_role_names)
1da177e4
LT		 297
298/*
299 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
300 */
301#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
302#define FC_WELLKNOWN_ROLE_MASK 0x00000f
303#define FC_FPORT_PORTID 0x00000e
304#define FC_FABCTLR_PORTID 0x00000d
305#define FC_DIRSRVR_PORTID 0x00000c
306#define FC_TIMESRVR_PORTID 0x00000b
307#define FC_MGMTSRVR_PORTID 0x00000a
308
309
c4028958
DH		 310static void fc_timeout_deleted_rport(struct work_struct *work);
311static void fc_timeout_fail_rport_io(struct work_struct *work);
312static void fc_scsi_scan_rport(struct work_struct *work);
1da177e4
LT		 313
314/*
315 * Attribute counts pre object type...
316 * Increase these values if you add attributes
317 */
318#define FC_STARGET_NUM_ATTRS 3
0f29b966 319#define FC_RPORT_NUM_ATTRS 10
a53eb5e0 320#define FC_VPORT_NUM_ATTRS 9
bb8ef587 321#define FC_HOST_NUM_ATTRS 29
1da177e4
LT		 322
323struct fc_internal {
324 struct scsi_transport_template t;
325 struct fc_function_template *f;
326
327 /*
328 * For attributes : each object has :
329 * An array of the actual attributes structures
330 * An array of null-terminated pointers to the attribute
331 * structures - used for mid-layer interaction.
332 *
333 * The attribute containers for the starget and host are are
334 * part of the midlayer. As the remote port is specific to the
335 * fc transport, we must provide the attribute container.
336 */
ee959b00 337 struct device_attribute private_starget_attrs[
1da177e4 338 FC_STARGET_NUM_ATTRS];
ee959b00 339 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
1da177e4 340
ee959b00
TJ		 341 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
342 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
1da177e4
LT		 343
344 struct transport_container rport_attr_cont;
ee959b00
TJ		 345 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
346 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
a53eb5e0
JS		 347
348 struct transport_container vport_attr_cont;
ee959b00
TJ		 349 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
350 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
1da177e4
LT		 351};
352
353#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
354
d0a7e574 355static int fc_target_setup(struct transport_container *tc, struct device *dev,
ee959b00 356 struct device *cdev)
1da177e4
LT		 357{
358 struct scsi_target *starget = to_scsi_target(dev);
359 struct fc_rport *rport = starget_to_rport(starget);
360
361 /*
362 * if parent is remote port, use values from remote port.
363 * Otherwise, this host uses the fc_transport, but not the
364 * remote port interface. As such, initialize to known non-values.
365 */
366 if (rport) {
367 fc_starget_node_name(starget) = rport->node_name;
368 fc_starget_port_name(starget) = rport->port_name;
369 fc_starget_port_id(starget) = rport->port_id;
370 } else {
371 fc_starget_node_name(starget) = -1;
372 fc_starget_port_name(starget) = -1;
373 fc_starget_port_id(starget) = -1;
374 }
375
376 return 0;
377}
378
379static DECLARE_TRANSPORT_CLASS(fc_transport_class,
380 "fc_transport",
381 fc_target_setup,
382 NULL,
383 NULL);
384
d0a7e574 385static int fc_host_setup(struct transport_container *tc, struct device *dev,
ee959b00 386 struct device *cdev)
1da177e4
LT		 387{
388 struct Scsi_Host *shost = dev_to_shost(dev);
aedf3497 389 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4 390
9ef3e4a4 391 /*
1da177e4
LT		 392 * Set default values easily detected by the midlayer as
393 * failure cases. The scsi lldd is responsible for initializing
394 * all transport attributes to valid values per host.
395 */
aedf3497
JS		 396 fc_host->node_name = -1;
397 fc_host->port_name = -1;
398 fc_host->permanent_port_name = -1;
399 fc_host->supported_classes = FC_COS_UNSPECIFIED;
400 memset(fc_host->supported_fc4s, 0,
401 sizeof(fc_host->supported_fc4s));
aedf3497
JS		 402 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
403 fc_host->maxframe_size = -1;
a53eb5e0 404 fc_host->max_npiv_vports = 0;
aedf3497
JS		 405 memset(fc_host->serial_number, 0,
406 sizeof(fc_host->serial_number));
bb8ef587
NP		 407 memset(fc_host->manufacturer, 0,
408 sizeof(fc_host->manufacturer));
409 memset(fc_host->model, 0,
410 sizeof(fc_host->model));
411 memset(fc_host->model_description, 0,
412 sizeof(fc_host->model_description));
413 memset(fc_host->hardware_version, 0,
414 sizeof(fc_host->hardware_version));
415 memset(fc_host->driver_version, 0,
416 sizeof(fc_host->driver_version));
417 memset(fc_host->firmware_version, 0,
418 sizeof(fc_host->firmware_version));
419 memset(fc_host->optionrom_version, 0,
420 sizeof(fc_host->optionrom_version));
aedf3497
JS		 421
422 fc_host->port_id = -1;
423 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
424 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
425 memset(fc_host->active_fc4s, 0,
426 sizeof(fc_host->active_fc4s));
427 fc_host->speed = FC_PORTSPEED_UNKNOWN;
428 fc_host->fabric_name = -1;
b8d08210
JS		 429 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
430 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
aedf3497
JS		 431
432 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
433
434 INIT_LIST_HEAD(&fc_host->rports);
435 INIT_LIST_HEAD(&fc_host->rport_bindings);
a53eb5e0 436 INIT_LIST_HEAD(&fc_host->vports);
aedf3497
JS		 437 fc_host->next_rport_number = 0;
438 fc_host->next_target_id = 0;
a53eb5e0
JS		 439 fc_host->next_vport_number = 0;
440 fc_host->npiv_vports_inuse = 0;
aedf3497 441
aab0de24
KS		 442 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
443 "fc_wq_%d", shost->host_no);
d8537548 444 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
aedf3497
JS		 445 if (!fc_host->work_q)
446 return -ENOMEM;
447
43ca910a 448 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
aab0de24
KS		 449 snprintf(fc_host->devloss_work_q_name,
450 sizeof(fc_host->devloss_work_q_name),
451 "fc_dl_%d", shost->host_no);
d8537548
KC		 452 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
453 fc_host->devloss_work_q_name);
aedf3497
JS		 454 if (!fc_host->devloss_work_q) {
455 destroy_workqueue(fc_host->work_q);
456 fc_host->work_q = NULL;
457 return -ENOMEM;
458 }
459
9e4f5e29
JS		 460 fc_bsg_hostadd(shost, fc_host);
461 /* ignore any bsg add error - we just can't do sgio */
462
463 return 0;
464}
465
466static int fc_host_remove(struct transport_container *tc, struct device *dev,
467 struct device *cdev)
468{
469 struct Scsi_Host *shost = dev_to_shost(dev);
470 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
471
472 fc_bsg_remove(fc_host->rqst_q);
1da177e4
LT		 473 return 0;
474}
475
476static DECLARE_TRANSPORT_CLASS(fc_host_class,
477 "fc_host",
478 fc_host_setup,
9e4f5e29 479 fc_host_remove,
1da177e4
LT		 480 NULL);
481
482/*
483 * Setup and Remove actions for remote ports are handled
484 * in the service functions below.
485 */
486static DECLARE_TRANSPORT_CLASS(fc_rport_class,
487 "fc_remote_ports",
488 NULL,
489 NULL,
490 NULL);
491
a53eb5e0
JS		 492/*
493 * Setup and Remove actions for virtual ports are handled
494 * in the service functions below.
495 */
496static DECLARE_TRANSPORT_CLASS(fc_vport_class,
497 "fc_vports",
498 NULL,
499 NULL,
500 NULL);
501
eb44820c 502/*
84314fd4 503 * Netlink Infrastructure
eb44820c 504 */
84314fd4
JS		 505
506static atomic_t fc_event_seq;
507
508/**
509 * fc_get_event_number - Obtain the next sequential FC event number
510 *
511 * Notes:
eb44820c 512 * We could have inlined this, but it would have required fc_event_seq to
84314fd4
JS		 513 * be exposed. For now, live with the subroutine call.
514 * Atomic used to avoid lock/unlock...
eb44820c 515 */
84314fd4
JS		 516u32
517fc_get_event_number(void)
518{
519 return atomic_add_return(1, &fc_event_seq);
520}
521EXPORT_SYMBOL(fc_get_event_number);
522
523
524/**
525 * fc_host_post_event - called to post an even on an fc_host.
84314fd4
JS		 526 * @shost: host the event occurred on
527 * @event_number: fc event number obtained from get_fc_event_number()
528 * @event_code: fc_host event being posted
529 * @event_data: 32bits of data for the event being posted
530 *
531 * Notes:
532 * This routine assumes no locks are held on entry.
eb44820c 533 */
84314fd4
JS		 534void
535fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
536 enum fc_host_event_code event_code, u32 event_data)
537{
538 struct sk_buff *skb;
539 struct nlmsghdr *nlh;
540 struct fc_nl_event *event;
541 const char *name;
e07ebea0 542 u32 len;
84314fd4
JS		 543 int err;
544
545 if (!scsi_nl_sock) {
546 err = -ENOENT;
547 goto send_fail;
548 }
549
550 len = FC_NL_MSGALIGN(sizeof(*event));
84314fd4 551
e07ebea0 552 skb = nlmsg_new(len, GFP_KERNEL);
84314fd4
JS		 553 if (!skb) {
554 err = -ENOBUFS;
555 goto send_fail;
556 }
557
e07ebea0 558 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
84314fd4
JS		 559 if (!nlh) {
560 err = -ENOBUFS;
561 goto send_fail_skb;
562 }
e07ebea0 563 event = nlmsg_data(nlh);
84314fd4
JS		 564
565 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
566 FC_NL_ASYNC_EVENT, len);
567 event->seconds = get_seconds();
568 event->vendor_id = 0;
569 event->host_no = shost->host_no;
570 event->event_datalen = sizeof(u32); /* bytes */
571 event->event_num = event_number;
572 event->event_code = event_code;
573 event->event_data = event_data;
574
ff491a73
PNA		 575 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
576 GFP_KERNEL);
84314fd4
JS		 577 return;
578
579send_fail_skb:
580 kfree_skb(skb);
581send_fail:
582 name = get_fc_host_event_code_name(event_code);
583 printk(KERN_WARNING
584 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
cadbd4a5 585 __func__, shost->host_no,
84314fd4
JS		 586 (name) ? name : "<unknown>", event_data, err);
587 return;
588}
589EXPORT_SYMBOL(fc_host_post_event);
590
591
592/**
eb44820c 593 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
84314fd4
JS		 594 * @shost: host the event occurred on
595 * @event_number: fc event number obtained from get_fc_event_number()
596 * @data_len: amount, in bytes, of vendor unique data
597 * @data_buf: pointer to vendor unique data
eb44820c 598 * @vendor_id: Vendor id
84314fd4
JS		 599 *
600 * Notes:
601 * This routine assumes no locks are held on entry.
eb44820c 602 */
84314fd4
JS		 603void
604fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
f14e2e29 605 u32 data_len, char * data_buf, u64 vendor_id)
84314fd4
JS		 606{
607 struct sk_buff *skb;
608 struct nlmsghdr *nlh;
609 struct fc_nl_event *event;
e07ebea0 610 u32 len;
84314fd4
JS		 611 int err;
612
613 if (!scsi_nl_sock) {
614 err = -ENOENT;
615 goto send_vendor_fail;
616 }
617
618 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
84314fd4 619
e07ebea0 620 skb = nlmsg_new(len, GFP_KERNEL);
84314fd4
JS		 621 if (!skb) {
622 err = -ENOBUFS;
623 goto send_vendor_fail;
624 }
625
e07ebea0 626 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
84314fd4
JS		 627 if (!nlh) {
628 err = -ENOBUFS;
629 goto send_vendor_fail_skb;
630 }
e07ebea0 631 event = nlmsg_data(nlh);
84314fd4
JS		 632
633 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
634 FC_NL_ASYNC_EVENT, len);
635 event->seconds = get_seconds();
636 event->vendor_id = vendor_id;
637 event->host_no = shost->host_no;
638 event->event_datalen = data_len; /* bytes */
639 event->event_num = event_number;
640 event->event_code = FCH_EVT_VENDOR_UNIQUE;
641 memcpy(&event->event_data, data_buf, data_len);
642
ff491a73
PNA		 643 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
644 GFP_KERNEL);
84314fd4
JS		 645 return;
646
647send_vendor_fail_skb:
648 kfree_skb(skb);
649send_vendor_fail:
650 printk(KERN_WARNING
651 "%s: Dropped Event : host %d vendor_unique - err %d\n",
cadbd4a5 652 __func__, shost->host_no, err);
84314fd4
JS		 653 return;
654}
655EXPORT_SYMBOL(fc_host_post_vendor_event);
656
657
1da177e4
LT		 658
659static __init int fc_transport_init(void)
660{
84314fd4
JS		 661 int error;
662
663 atomic_set(&fc_event_seq, 0);
664
665 error = transport_class_register(&fc_host_class);
a53eb5e0
JS		 666 if (error)
667 return error;
668 error = transport_class_register(&fc_vport_class);
1da177e4 669 if (error)
48de68a4 670 goto unreg_host_class;
1da177e4
LT		 671 error = transport_class_register(&fc_rport_class);
672 if (error)
48de68a4
MC		 673 goto unreg_vport_class;
674 error = transport_class_register(&fc_transport_class);
675 if (error)
676 goto unreg_rport_class;
677 return 0;
678
679unreg_rport_class:
680 transport_class_unregister(&fc_rport_class);
681unreg_vport_class:
682 transport_class_unregister(&fc_vport_class);
683unreg_host_class:
684 transport_class_unregister(&fc_host_class);
685 return error;
1da177e4
LT		 686}
687
688static void __exit fc_transport_exit(void)
689{
690 transport_class_unregister(&fc_transport_class);
691 transport_class_unregister(&fc_rport_class);
692 transport_class_unregister(&fc_host_class);
a53eb5e0 693 transport_class_unregister(&fc_vport_class);
1da177e4
LT		 694}
695
696/*
697 * FC Remote Port Attribute Management
698 */
699
700#define fc_rport_show_function(field, format_string, sz, cast) \
701static ssize_t \
ee959b00
TJ		 702show_fc_rport_##field (struct device *dev, \
703 struct device_attribute *attr, char *buf) \
1da177e4 704{ \
ee959b00 705 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 706 struct Scsi_Host *shost = rport_to_shost(rport); \
707 struct fc_internal *i = to_fc_internal(shost->transportt); \
19a7b4ae
JSEC		 708 if ((i->f->get_rport_##field) && \
709 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 710 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae 711 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
1da177e4
LT		 712 i->f->get_rport_##field(rport); \
713 return snprintf(buf, sz, format_string, cast rport->field); \
714}
715
716#define fc_rport_store_function(field) \
717static ssize_t \
ee959b00
TJ		 718store_fc_rport_##field(struct device *dev, \
719 struct device_attribute *attr, \
720 const char *buf, size_t count) \
1da177e4
LT		 721{ \
722 int val; \
ee959b00 723 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 724 struct Scsi_Host *shost = rport_to_shost(rport); \
725 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 726 char *cp; \
19a7b4ae 727 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 728 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae
JSEC		 729 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
730 return -EBUSY; \
0f29b966
JS		 731 val = simple_strtoul(buf, &cp, 0); \
732 if (*cp && (*cp != '\n')) \
733 return -EINVAL; \
1da177e4
LT		 734 i->f->set_rport_##field(rport, val); \
735 return count; \
736}
737
738#define fc_rport_rd_attr(field, format_string, sz) \
739 fc_rport_show_function(field, format_string, sz, ) \
ee959b00 740static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 741 show_fc_rport_##field, NULL)
742
743#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
744 fc_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 745static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 746 show_fc_rport_##field, NULL)
747
748#define fc_rport_rw_attr(field, format_string, sz) \
749 fc_rport_show_function(field, format_string, sz, ) \
750 fc_rport_store_function(field) \
ee959b00 751static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 752 show_fc_rport_##field, \
753 store_fc_rport_##field)
754
755
756#define fc_private_rport_show_function(field, format_string, sz, cast) \
757static ssize_t \
ee959b00
TJ		 758show_fc_rport_##field (struct device *dev, \
759 struct device_attribute *attr, char *buf) \
1da177e4 760{ \
ee959b00 761 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 762 return snprintf(buf, sz, format_string, cast rport->field); \
763}
764
765#define fc_private_rport_rd_attr(field, format_string, sz) \
766 fc_private_rport_show_function(field, format_string, sz, ) \
ee959b00 767static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 768 show_fc_rport_##field, NULL)
769
770#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
771 fc_private_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 772static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 773 show_fc_rport_##field, NULL)
774
775
776#define fc_private_rport_rd_enum_attr(title, maxlen) \
777static ssize_t \
ee959b00
TJ		 778show_fc_rport_##title (struct device *dev, \
779 struct device_attribute *attr, char *buf) \
1da177e4 780{ \
ee959b00 781 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 782 const char *name; \
783 name = get_fc_##title##_name(rport->title); \
784 if (!name) \
785 return -EINVAL; \
786 return snprintf(buf, maxlen, "%s\n", name); \
787} \
ee959b00 788static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1da177e4
LT		 789 show_fc_rport_##title, NULL)
790
791
792#define SETUP_RPORT_ATTRIBUTE_RD(field) \
ee959b00 793 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 794 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
795 i->private_rport_attrs[count].store = NULL; \
796 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
797 if (i->f->show_rport_##field) \
798 count++
799
800#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
ee959b00 801 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 802 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
803 i->private_rport_attrs[count].store = NULL; \
804 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
805 count++
806
807#define SETUP_RPORT_ATTRIBUTE_RW(field) \
ee959b00 808 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 809 if (!i->f->set_rport_##field) { \
810 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
811 i->private_rport_attrs[count].store = NULL; \
812 } \
813 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
814 if (i->f->show_rport_##field) \
815 count++
816
0f29b966
JS		 817#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
818{ \
ee959b00 819 i->private_rport_attrs[count] = device_attr_rport_##field; \
0f29b966
JS		 820 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
821 count++; \
822}
823
1da177e4
LT		 824
825/* The FC Transport Remote Port Attributes: */
826
827/* Fixed Remote Port Attributes */
828
829fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
830
831static ssize_t
ee959b00
TJ		 832show_fc_rport_supported_classes (struct device *dev,
833 struct device_attribute *attr, char *buf)
1da177e4 834{
ee959b00 835 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 836 if (rport->supported_classes == FC_COS_UNSPECIFIED)
837 return snprintf(buf, 20, "unspecified\n");
838 return get_fc_cos_names(rport->supported_classes, buf);
839}
ee959b00 840static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1da177e4
LT		 841 show_fc_rport_supported_classes, NULL);
842
843/* Dynamic Remote Port Attributes */
844
19a7b4ae
JSEC		 845/*
846 * dev_loss_tmo attribute
847 */
43ca910a
MC		 848static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
849{
850 char *cp;
851
852 *val = simple_strtoul(buf, &cp, 0);
853 if ((*cp && (*cp != '\n')) || (*val < 0))
854 return -EINVAL;
855 /*
856 * Check for overflow; dev_loss_tmo is u32
857 */
858 if (*val > UINT_MAX)
859 return -EINVAL;
860
861 return 0;
862}
863
864static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
865 unsigned long val)
19a7b4ae 866{
19a7b4ae
JSEC		 867 struct Scsi_Host *shost = rport_to_shost(rport);
868 struct fc_internal *i = to_fc_internal(shost->transportt);
43ca910a 869
19a7b4ae 870 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
42e33148 871 (rport->port_state == FC_PORTSTATE_DELETED) ||
19a7b4ae
JSEC		 872 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
873 return -EBUSY;
36dd288f
HR		 874 /*
875 * Check for overflow; dev_loss_tmo is u32
876 */
877 if (val > UINT_MAX)
878 return -EINVAL;
879
f2818663
HR		 880 /*
881 * If fast_io_fail is off we have to cap
882 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
883 */
884 if (rport->fast_io_fail_tmo == -1 &&
885 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
886 return -EINVAL;
887
19a7b4ae 888 i->f->set_rport_dev_loss_tmo(rport, val);
43ca910a
MC		 889 return 0;
890}
891
892fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
893static ssize_t
894store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
895 const char *buf, size_t count)
896{
897 struct fc_rport *rport = transport_class_to_rport(dev);
898 unsigned long val;
899 int rc;
900
901 rc = fc_str_to_dev_loss(buf, &val);
902 if (rc)
903 return rc;
904
905 rc = fc_rport_set_dev_loss_tmo(rport, val);
906 if (rc)
907 return rc;
19a7b4ae
JSEC		 908 return count;
909}
ee959b00 910static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
19a7b4ae 911 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1da177e4
LT		 912
913
914/* Private Remote Port Attributes */
915
916fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
917fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
918fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
919
920static ssize_t
ee959b00
TJ		 921show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
922 char *buf)
1da177e4 923{
ee959b00 924 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 925
926 /* identify any roles that are port_id specific */
927 if ((rport->port_id != -1) &&
928 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
929 FC_WELLKNOWN_PORTID_MASK) {
930 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
931 case FC_FPORT_PORTID:
932 return snprintf(buf, 30, "Fabric Port\n");
933 case FC_FABCTLR_PORTID:
934 return snprintf(buf, 30, "Fabric Controller\n");
935 case FC_DIRSRVR_PORTID:
936 return snprintf(buf, 30, "Directory Server\n");
937 case FC_TIMESRVR_PORTID:
938 return snprintf(buf, 30, "Time Server\n");
939 case FC_MGMTSRVR_PORTID:
940 return snprintf(buf, 30, "Management Server\n");
941 default:
942 return snprintf(buf, 30, "Unknown Fabric Entity\n");
943 }
944 } else {
a53eb5e0 945 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1da177e4 946 return snprintf(buf, 20, "unknown\n");
a53eb5e0 947 return get_fc_port_roles_names(rport->roles, buf);
1da177e4
LT		 948 }
949}
ee959b00 950static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1da177e4
LT		 951 show_fc_rport_roles, NULL);
952
953fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
954fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
955
0f29b966
JS		 956/*
957 * fast_io_fail_tmo attribute
958 */
959static ssize_t
ee959b00
TJ		 960show_fc_rport_fast_io_fail_tmo (struct device *dev,
961 struct device_attribute *attr, char *buf)
0f29b966 962{
ee959b00 963 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 964
965 if (rport->fast_io_fail_tmo == -1)
966 return snprintf(buf, 5, "off\n");
967 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
968}
969
970static ssize_t
ee959b00
TJ		 971store_fc_rport_fast_io_fail_tmo(struct device *dev,
972 struct device_attribute *attr, const char *buf,
973 size_t count)
0f29b966
JS		 974{
975 int val;
976 char *cp;
ee959b00 977 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 978
979 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
980 (rport->port_state == FC_PORTSTATE_DELETED) ||
981 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
982 return -EBUSY;
983 if (strncmp(buf, "off", 3) == 0)
984 rport->fast_io_fail_tmo = -1;
985 else {
986 val = simple_strtoul(buf, &cp, 0);
f2818663
HR		 987 if ((*cp && (*cp != '\n')) || (val < 0))
988 return -EINVAL;
989 /*
990 * Cap fast_io_fail by dev_loss_tmo or
991 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
992 */
993 if ((val >= rport->dev_loss_tmo) ||
994 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
0f29b966 995 return -EINVAL;
f2818663 996
0f29b966
JS		 997 rport->fast_io_fail_tmo = val;
998 }
999 return count;
1000}
ee959b00 1001static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
0f29b966 1002 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1da177e4
LT		 1003
1004
1005/*
1006 * FC SCSI Target Attribute Management
1007 */
1008
1009/*
1010 * Note: in the target show function we recognize when the remote
732bee7a 1011 * port is in the hierarchy and do not allow the driver to get
1da177e4
LT		 1012 * involved in sysfs functions. The driver only gets involved if
1013 * it's the "old" style that doesn't use rports.
1014 */
1015#define fc_starget_show_function(field, format_string, sz, cast) \
1016static ssize_t \
ee959b00
TJ		 1017show_fc_starget_##field (struct device *dev, \
1018 struct device_attribute *attr, char *buf) \
1da177e4 1019{ \
ee959b00 1020 struct scsi_target *starget = transport_class_to_starget(dev); \
1da177e4
LT		 1021 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1022 struct fc_internal *i = to_fc_internal(shost->transportt); \
1023 struct fc_rport *rport = starget_to_rport(starget); \
1024 if (rport) \
1025 fc_starget_##field(starget) = rport->field; \
1026 else if (i->f->get_starget_##field) \
1027 i->f->get_starget_##field(starget); \
1028 return snprintf(buf, sz, format_string, \
1029 cast fc_starget_##field(starget)); \
1030}
1031
1032#define fc_starget_rd_attr(field, format_string, sz) \
1033 fc_starget_show_function(field, format_string, sz, ) \
ee959b00 1034static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 1035 show_fc_starget_##field, NULL)
1036
1037#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1038 fc_starget_show_function(field, format_string, sz, (cast)) \
ee959b00 1039static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 1040 show_fc_starget_##field, NULL)
1041
1042#define SETUP_STARGET_ATTRIBUTE_RD(field) \
ee959b00 1043 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 1044 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1045 i->private_starget_attrs[count].store = NULL; \
1046 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1047 if (i->f->show_starget_##field) \
1048 count++
1049
1050#define SETUP_STARGET_ATTRIBUTE_RW(field) \
ee959b00 1051 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 1052 if (!i->f->set_starget_##field) { \
1053 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1054 i->private_starget_attrs[count].store = NULL; \
1055 } \
1056 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1057 if (i->f->show_starget_##field) \
1058 count++
1059
1060/* The FC Transport SCSI Target Attributes: */
1061fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1062fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1063fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1064
1065
a53eb5e0
JS		 1066/*
1067 * FC Virtual Port Attribute Management
1068 */
1069
1070#define fc_vport_show_function(field, format_string, sz, cast) \
1071static ssize_t \
ee959b00
TJ		 1072show_fc_vport_##field (struct device *dev, \
1073 struct device_attribute *attr, char *buf) \
a53eb5e0 1074{ \
ee959b00 1075 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1076 struct Scsi_Host *shost = vport_to_shost(vport); \
1077 struct fc_internal *i = to_fc_internal(shost->transportt); \
1078 if ((i->f->get_vport_##field) && \
1079 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1080 i->f->get_vport_##field(vport); \
1081 return snprintf(buf, sz, format_string, cast vport->field); \
1082}
1083
1084#define fc_vport_store_function(field) \
1085static ssize_t \
ee959b00
TJ		 1086store_fc_vport_##field(struct device *dev, \
1087 struct device_attribute *attr, \
1088 const char *buf, size_t count) \
a53eb5e0
JS		 1089{ \
1090 int val; \
ee959b00 1091 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1092 struct Scsi_Host *shost = vport_to_shost(vport); \
1093 struct fc_internal *i = to_fc_internal(shost->transportt); \
1094 char *cp; \
1095 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1096 return -EBUSY; \
1097 val = simple_strtoul(buf, &cp, 0); \
1098 if (*cp && (*cp != '\n')) \
1099 return -EINVAL; \
1100 i->f->set_vport_##field(vport, val); \
1101 return count; \
1102}
1103
1104#define fc_vport_store_str_function(field, slen) \
1105static ssize_t \
ee959b00
TJ		 1106store_fc_vport_##field(struct device *dev, \
1107 struct device_attribute *attr, \
1108 const char *buf, size_t count) \
a53eb5e0 1109{ \
ee959b00 1110 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1111 struct Scsi_Host *shost = vport_to_shost(vport); \
1112 struct fc_internal *i = to_fc_internal(shost->transportt); \
1113 unsigned int cnt=count; \
1114 \
1115 /* count may include a LF at end of string */ \
1116 if (buf[cnt-1] == '\n') \
1117 cnt--; \
1118 if (cnt > ((slen) - 1)) \
1119 return -EINVAL; \
1120 memcpy(vport->field, buf, cnt); \
1121 i->f->set_vport_##field(vport); \
1122 return count; \
1123}
1124
1125#define fc_vport_rd_attr(field, format_string, sz) \
1126 fc_vport_show_function(field, format_string, sz, ) \
ee959b00 1127static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1128 show_fc_vport_##field, NULL)
1129
1130#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1131 fc_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1132static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1133 show_fc_vport_##field, NULL)
1134
1135#define fc_vport_rw_attr(field, format_string, sz) \
1136 fc_vport_show_function(field, format_string, sz, ) \
1137 fc_vport_store_function(field) \
ee959b00 1138static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1139 show_fc_vport_##field, \
1140 store_fc_vport_##field)
1141
1142#define fc_private_vport_show_function(field, format_string, sz, cast) \
1143static ssize_t \
ee959b00
TJ		 1144show_fc_vport_##field (struct device *dev, \
1145 struct device_attribute *attr, char *buf) \
a53eb5e0 1146{ \
ee959b00 1147 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1148 return snprintf(buf, sz, format_string, cast vport->field); \
1149}
1150
1151#define fc_private_vport_store_u32_function(field) \
1152static ssize_t \
ee959b00
TJ		 1153store_fc_vport_##field(struct device *dev, \
1154 struct device_attribute *attr, \
1155 const char *buf, size_t count) \
a53eb5e0
JS		 1156{ \
1157 u32 val; \
ee959b00 1158 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1159 char *cp; \
1160 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1161 return -EBUSY; \
1162 val = simple_strtoul(buf, &cp, 0); \
1163 if (*cp && (*cp != '\n')) \
1164 return -EINVAL; \
1165 vport->field = val; \
1166 return count; \
1167}
1168
1169
1170#define fc_private_vport_rd_attr(field, format_string, sz) \
1171 fc_private_vport_show_function(field, format_string, sz, ) \
ee959b00 1172static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1173 show_fc_vport_##field, NULL)
1174
1175#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1176 fc_private_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1177static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1178 show_fc_vport_##field, NULL)
1179
1180#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1181 fc_private_vport_show_function(field, format_string, sz, ) \
1182 fc_private_vport_store_u32_function(field) \
ee959b00 1183static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1184 show_fc_vport_##field, \
1185 store_fc_vport_##field)
1186
1187
1188#define fc_private_vport_rd_enum_attr(title, maxlen) \
1189static ssize_t \
ee959b00
TJ		 1190show_fc_vport_##title (struct device *dev, \
1191 struct device_attribute *attr, \
1192 char *buf) \
a53eb5e0 1193{ \
ee959b00 1194 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1195 const char *name; \
1196 name = get_fc_##title##_name(vport->title); \
1197 if (!name) \
1198 return -EINVAL; \
1199 return snprintf(buf, maxlen, "%s\n", name); \
1200} \
ee959b00 1201static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
a53eb5e0
JS		 1202 show_fc_vport_##title, NULL)
1203
1204
1205#define SETUP_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1206 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1207 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1208 i->private_vport_attrs[count].store = NULL; \
1209 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1210 if (i->f->get_##field) \
1211 count++
1212 /* NOTE: Above MACRO differs: checks function not show bit */
1213
1214#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1215 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1216 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1217 i->private_vport_attrs[count].store = NULL; \
1218 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1219 count++
1220
1221#define SETUP_VPORT_ATTRIBUTE_WR(field) \
ee959b00 1222 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1223 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1224 if (i->f->field) \
1225 count++
1226 /* NOTE: Above MACRO differs: checks function */
1227
1228#define SETUP_VPORT_ATTRIBUTE_RW(field) \
ee959b00 1229 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1230 if (!i->f->set_vport_##field) { \
1231 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1232 i->private_vport_attrs[count].store = NULL; \
1233 } \
1234 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1235 count++
1236 /* NOTE: Above MACRO differs: does not check show bit */
1237
1238#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1239{ \
ee959b00 1240 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1241 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1242 count++; \
1243}
1244
1245
1246/* The FC Transport Virtual Port Attributes: */
1247
1248/* Fixed Virtual Port Attributes */
1249
1250/* Dynamic Virtual Port Attributes */
1251
1252/* Private Virtual Port Attributes */
1253
1254fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1255fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1256fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1257fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1258
1259static ssize_t
ee959b00
TJ		 1260show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1261 char *buf)
a53eb5e0 1262{
ee959b00 1263 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1264
1265 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1266 return snprintf(buf, 20, "unknown\n");
1267 return get_fc_port_roles_names(vport->roles, buf);
1268}
ee959b00 1269static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
a53eb5e0
JS		 1270
1271fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1272
1273fc_private_vport_show_function(symbolic_name, "%s\n",
1274 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1275fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
ee959b00 1276static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
a53eb5e0
JS		 1277 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1278
1279static ssize_t
ee959b00
TJ		 1280store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1281 const char *buf, size_t count)
a53eb5e0 1282{
ee959b00 1283 struct fc_vport *vport = transport_class_to_vport(dev);
9ef3e4a4 1284 struct Scsi_Host *shost = vport_to_shost(vport);
0d9dc7c8
GR		 1285 unsigned long flags;
1286
1287 spin_lock_irqsave(shost->host_lock, flags);
1288 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1289 spin_unlock_irqrestore(shost->host_lock, flags);
1290 return -EBUSY;
1291 }
1292 vport->flags |= FC_VPORT_DELETING;
1293 spin_unlock_irqrestore(shost->host_lock, flags);
a53eb5e0 1294
9ef3e4a4 1295 fc_queue_work(shost, &vport->vport_delete_work);
a53eb5e0
JS		 1296 return count;
1297}
ee959b00 1298static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
a53eb5e0
JS		 1299 NULL, store_fc_vport_delete);
1300
1301
1302/*
1303 * Enable/Disable vport
1304 * Write "1" to disable, write "0" to enable
1305 */
1306static ssize_t
ee959b00
TJ		 1307store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1308 const char *buf,
a53eb5e0
JS		 1309 size_t count)
1310{
ee959b00 1311 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1312 struct Scsi_Host *shost = vport_to_shost(vport);
1313 struct fc_internal *i = to_fc_internal(shost->transportt);
1314 int stat;
1315
1316 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1317 return -EBUSY;
1318
1319 if (*buf == '0') {
1320 if (vport->vport_state != FC_VPORT_DISABLED)
1321 return -EALREADY;
1322 } else if (*buf == '1') {
1323 if (vport->vport_state == FC_VPORT_DISABLED)
1324 return -EALREADY;
1325 } else
1326 return -EINVAL;
1327
1328 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1329 return stat ? stat : count;
1330}
ee959b00 1331static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
a53eb5e0
JS		 1332 NULL, store_fc_vport_disable);
1333
1334
1da177e4
LT		 1335/*
1336 * Host Attribute Management
1337 */
1338
1339#define fc_host_show_function(field, format_string, sz, cast) \
1340static ssize_t \
ee959b00
TJ		 1341show_fc_host_##field (struct device *dev, \
1342 struct device_attribute *attr, char *buf) \
1da177e4 1343{ \
ee959b00 1344 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1345 struct fc_internal *i = to_fc_internal(shost->transportt); \
1346 if (i->f->get_host_##field) \
1347 i->f->get_host_##field(shost); \
1348 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1349}
1350
1351#define fc_host_store_function(field) \
1352static ssize_t \
ee959b00
TJ		 1353store_fc_host_##field(struct device *dev, \
1354 struct device_attribute *attr, \
1355 const char *buf, size_t count) \
1da177e4
LT		 1356{ \
1357 int val; \
ee959b00 1358 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4 1359 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 1360 char *cp; \
1da177e4 1361 \
0f29b966
JS		 1362 val = simple_strtoul(buf, &cp, 0); \
1363 if (*cp && (*cp != '\n')) \
1364 return -EINVAL; \
1da177e4
LT		 1365 i->f->set_host_##field(shost, val); \
1366 return count; \
1367}
1368
b8d08210
JS		 1369#define fc_host_store_str_function(field, slen) \
1370static ssize_t \
ee959b00
TJ		 1371store_fc_host_##field(struct device *dev, \
1372 struct device_attribute *attr, \
1373 const char *buf, size_t count) \
b8d08210 1374{ \
ee959b00 1375 struct Scsi_Host *shost = transport_class_to_shost(dev); \
b8d08210
JS		 1376 struct fc_internal *i = to_fc_internal(shost->transportt); \
1377 unsigned int cnt=count; \
1378 \
1379 /* count may include a LF at end of string */ \
1380 if (buf[cnt-1] == '\n') \
1381 cnt--; \
1382 if (cnt > ((slen) - 1)) \
1383 return -EINVAL; \
1384 memcpy(fc_host_##field(shost), buf, cnt); \
1385 i->f->set_host_##field(shost); \
1386 return count; \
1387}
1388
1da177e4
LT		 1389#define fc_host_rd_attr(field, format_string, sz) \
1390 fc_host_show_function(field, format_string, sz, ) \
ee959b00 1391static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1392 show_fc_host_##field, NULL)
1393
1394#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1395 fc_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1396static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1397 show_fc_host_##field, NULL)
1398
1399#define fc_host_rw_attr(field, format_string, sz) \
1400 fc_host_show_function(field, format_string, sz, ) \
1401 fc_host_store_function(field) \
ee959b00 1402static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 1403 show_fc_host_##field, \
1404 store_fc_host_##field)
1405
1406#define fc_host_rd_enum_attr(title, maxlen) \
1407static ssize_t \
ee959b00
TJ		 1408show_fc_host_##title (struct device *dev, \
1409 struct device_attribute *attr, char *buf) \
1da177e4 1410{ \
ee959b00 1411 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1412 struct fc_internal *i = to_fc_internal(shost->transportt); \
1413 const char *name; \
1414 if (i->f->get_host_##title) \
1415 i->f->get_host_##title(shost); \
1416 name = get_fc_##title##_name(fc_host_##title(shost)); \
1417 if (!name) \
1418 return -EINVAL; \
1419 return snprintf(buf, maxlen, "%s\n", name); \
1420} \
ee959b00 1421static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1da177e4
LT		 1422
1423#define SETUP_HOST_ATTRIBUTE_RD(field) \
ee959b00 1424 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1425 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1426 i->private_host_attrs[count].store = NULL; \
1427 i->host_attrs[count] = &i->private_host_attrs[count]; \
1428 if (i->f->show_host_##field) \
1429 count++
1430
a53eb5e0 1431#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
ee959b00 1432 i->private_host_attrs[count] = device_attr_host_##field; \
a53eb5e0
JS		 1433 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1434 i->private_host_attrs[count].store = NULL; \
1435 i->host_attrs[count] = &i->private_host_attrs[count]; \
1436 count++
1437
1da177e4 1438#define SETUP_HOST_ATTRIBUTE_RW(field) \
ee959b00 1439 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1440 if (!i->f->set_host_##field) { \
1441 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1442 i->private_host_attrs[count].store = NULL; \
1443 } \
1444 i->host_attrs[count] = &i->private_host_attrs[count]; \
1445 if (i->f->show_host_##field) \
1446 count++
1447
1448
1449#define fc_private_host_show_function(field, format_string, sz, cast) \
1450static ssize_t \
ee959b00
TJ		 1451show_fc_host_##field (struct device *dev, \
1452 struct device_attribute *attr, char *buf) \
1da177e4 1453{ \
ee959b00 1454 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1455 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1456}
1457
1458#define fc_private_host_rd_attr(field, format_string, sz) \
1459 fc_private_host_show_function(field, format_string, sz, ) \
ee959b00 1460static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1461 show_fc_host_##field, NULL)
1462
1463#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1464 fc_private_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1465static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1466 show_fc_host_##field, NULL)
1467
1468#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
ee959b00 1469 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1470 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1471 i->private_host_attrs[count].store = NULL; \
1472 i->host_attrs[count] = &i->private_host_attrs[count]; \
1473 count++
1474
1475#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
91ca7b01 1476{ \
ee959b00 1477 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4 1478 i->host_attrs[count] = &i->private_host_attrs[count]; \
91ca7b01
AV		 1479 count++; \
1480}
1da177e4
LT		 1481
1482
1483/* Fixed Host Attributes */
1484
1485static ssize_t
ee959b00
TJ		 1486show_fc_host_supported_classes (struct device *dev,
1487 struct device_attribute *attr, char *buf)
1da177e4 1488{
ee959b00 1489 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1490
1491 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1492 return snprintf(buf, 20, "unspecified\n");
1493
1494 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1495}
ee959b00 1496static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1da177e4
LT		 1497 show_fc_host_supported_classes, NULL);
1498
1499static ssize_t
ee959b00
TJ		 1500show_fc_host_supported_fc4s (struct device *dev,
1501 struct device_attribute *attr, char *buf)
1da177e4 1502{
ee959b00 1503 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1504 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1505}
ee959b00 1506static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1da177e4
LT		 1507 show_fc_host_supported_fc4s, NULL);
1508
1509static ssize_t
ee959b00
TJ		 1510show_fc_host_supported_speeds (struct device *dev,
1511 struct device_attribute *attr, char *buf)
1da177e4 1512{
ee959b00 1513 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1514
1515 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1516 return snprintf(buf, 20, "unknown\n");
1517
1518 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1519}
ee959b00 1520static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1da177e4
LT		 1521 show_fc_host_supported_speeds, NULL);
1522
1523
1524fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1525fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
6b7281d0
AH		 1526fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1527 unsigned long long);
1da177e4 1528fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
a53eb5e0 1529fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1da177e4 1530fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
bb8ef587
NP		 1531fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1532fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1533fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1534fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1535fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1537fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1da177e4
LT		 1538
1539
1540/* Dynamic Host Attributes */
1541
1542static ssize_t
ee959b00
TJ		 1543show_fc_host_active_fc4s (struct device *dev,
1544 struct device_attribute *attr, char *buf)
1da177e4 1545{
ee959b00 1546 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1547 struct fc_internal *i = to_fc_internal(shost->transportt);
1548
1549 if (i->f->get_host_active_fc4s)
1550 i->f->get_host_active_fc4s(shost);
1551
1552 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1553}
ee959b00 1554static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1da177e4
LT		 1555 show_fc_host_active_fc4s, NULL);
1556
1557static ssize_t
ee959b00
TJ		 1558show_fc_host_speed (struct device *dev,
1559 struct device_attribute *attr, char *buf)
1da177e4 1560{
ee959b00 1561 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1562 struct fc_internal *i = to_fc_internal(shost->transportt);
1563
1564 if (i->f->get_host_speed)
1565 i->f->get_host_speed(shost);
1566
1567 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1568 return snprintf(buf, 20, "unknown\n");
1569
1570 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1571}
ee959b00 1572static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1da177e4
LT		 1573 show_fc_host_speed, NULL);
1574
1575
1576fc_host_rd_attr(port_id, "0x%06x\n", 20);
1577fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1578fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1579fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
016131b8 1580fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1da177e4 1581
b8d08210
JS		 1582fc_private_host_show_function(system_hostname, "%s\n",
1583 FC_SYMBOLIC_NAME_SIZE + 1, )
1584fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
ee959b00 1585static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
b8d08210
JS		 1586 show_fc_host_system_hostname, store_fc_host_system_hostname);
1587
1da177e4
LT		 1588
1589/* Private Host Attributes */
1590
1591static ssize_t
ee959b00
TJ		 1592show_fc_private_host_tgtid_bind_type(struct device *dev,
1593 struct device_attribute *attr, char *buf)
1da177e4 1594{
ee959b00 1595 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1596 const char *name;
1597
1598 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1599 if (!name)
1600 return -EINVAL;
1601 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1602}
1603
d16794f6
JSEC		 1604#define get_list_head_entry(pos, head, member) \
1605 pos = list_entry((head)->next, typeof(*pos), member)
1606
1da177e4 1607static ssize_t
ee959b00
TJ		 1608store_fc_private_host_tgtid_bind_type(struct device *dev,
1609 struct device_attribute *attr, const char *buf, size_t count)
1da177e4 1610{
ee959b00 1611 struct Scsi_Host *shost = transport_class_to_shost(dev);
d16794f6 1612 struct fc_rport *rport;
1da177e4
LT		 1613 enum fc_tgtid_binding_type val;
1614 unsigned long flags;
1615
1616 if (get_fc_tgtid_bind_type_match(buf, &val))
1617 return -EINVAL;
1618
1619 /* if changing bind type, purge all unused consistent bindings */
1620 if (val != fc_host_tgtid_bind_type(shost)) {
1621 spin_lock_irqsave(shost->host_lock, flags);
d16794f6
JSEC		 1622 while (!list_empty(&fc_host_rport_bindings(shost))) {
1623 get_list_head_entry(rport,
1624 &fc_host_rport_bindings(shost), peers);
aedf3497
JS		 1625 list_del(&rport->peers);
1626 rport->port_state = FC_PORTSTATE_DELETED;
1627 fc_queue_work(shost, &rport->rport_delete_work);
d16794f6 1628 }
1da177e4
LT		 1629 spin_unlock_irqrestore(shost->host_lock, flags);
1630 }
1631
1632 fc_host_tgtid_bind_type(shost) = val;
1633 return count;
1634}
1635
ee959b00 1636static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1da177e4
LT		 1637 show_fc_private_host_tgtid_bind_type,
1638 store_fc_private_host_tgtid_bind_type);
1639
91ca7b01 1640static ssize_t
ee959b00
TJ		 1641store_fc_private_host_issue_lip(struct device *dev,
1642 struct device_attribute *attr, const char *buf, size_t count)
91ca7b01 1643{
ee959b00 1644 struct Scsi_Host *shost = transport_class_to_shost(dev);
91ca7b01
AV		 1645 struct fc_internal *i = to_fc_internal(shost->transportt);
1646 int ret;
1647
1648 /* ignore any data value written to the attribute */
1649 if (i->f->issue_fc_host_lip) {
1650 ret = i->f->issue_fc_host_lip(shost);
1651 return ret ? ret: count;
1652 }
1653
1654 return -ENOENT;
1655}
1656
ee959b00 1657static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
91ca7b01
AV		 1658 store_fc_private_host_issue_lip);
1659
43ca910a
MC		 1660static ssize_t
1661store_fc_private_host_dev_loss_tmo(struct device *dev,
1662 struct device_attribute *attr,
1663 const char *buf, size_t count)
1664{
1665 struct Scsi_Host *shost = transport_class_to_shost(dev);
1666 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1667 struct fc_rport *rport;
1668 unsigned long val, flags;
1669 int rc;
1670
1671 rc = fc_str_to_dev_loss(buf, &val);
1672 if (rc)
1673 return rc;
1674
1675 fc_host_dev_loss_tmo(shost) = val;
1676 spin_lock_irqsave(shost->host_lock, flags);
1677 list_for_each_entry(rport, &fc_host->rports, peers)
1678 fc_rport_set_dev_loss_tmo(rport, val);
1679 spin_unlock_irqrestore(shost->host_lock, flags);
1680 return count;
1681}
a53eb5e0 1682
43ca910a
MC		 1683fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1684static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1685 show_fc_host_dev_loss_tmo,
1686 store_fc_private_host_dev_loss_tmo);
1687
1688fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
a53eb5e0 1689
1da177e4
LT		 1690/*
1691 * Host Statistics Management
1692 */
1693
1694/* Show a given an attribute in the statistics group */
1695static ssize_t
ee959b00 1696fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1da177e4 1697{
ee959b00 1698 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1699 struct fc_internal *i = to_fc_internal(shost->transportt);
1700 struct fc_host_statistics *stats;
1701 ssize_t ret = -ENOENT;
1702
1703 if (offset > sizeof(struct fc_host_statistics) ||
1704 offset % sizeof(u64) != 0)
1705 WARN_ON(1);
1706
1707 if (i->f->get_fc_host_stats) {
1708 stats = (i->f->get_fc_host_stats)(shost);
1709 if (stats)
1710 ret = snprintf(buf, 20, "0x%llx\n",
1711 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1712 }
1713 return ret;
1714}
1715
1716
1717/* generate a read-only statistics attribute */
1718#define fc_host_statistic(name) \
ee959b00
TJ		 1719static ssize_t show_fcstat_##name(struct device *cd, \
1720 struct device_attribute *attr, \
1721 char *buf) \
1da177e4
LT		 1722{ \
1723 return fc_stat_show(cd, buf, \
1724 offsetof(struct fc_host_statistics, name)); \
1725} \
ee959b00 1726static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1da177e4
LT		 1727
1728fc_host_statistic(seconds_since_last_reset);
1729fc_host_statistic(tx_frames);
1730fc_host_statistic(tx_words);
1731fc_host_statistic(rx_frames);
1732fc_host_statistic(rx_words);
1733fc_host_statistic(lip_count);
1734fc_host_statistic(nos_count);
1735fc_host_statistic(error_frames);
1736fc_host_statistic(dumped_frames);
1737fc_host_statistic(link_failure_count);
1738fc_host_statistic(loss_of_sync_count);
1739fc_host_statistic(loss_of_signal_count);
1740fc_host_statistic(prim_seq_protocol_err_count);
1741fc_host_statistic(invalid_tx_word_count);
1742fc_host_statistic(invalid_crc_count);
1743fc_host_statistic(fcp_input_requests);
1744fc_host_statistic(fcp_output_requests);
1745fc_host_statistic(fcp_control_requests);
1746fc_host_statistic(fcp_input_megabytes);
1747fc_host_statistic(fcp_output_megabytes);
e58abb0c
VD		 1748fc_host_statistic(fcp_packet_alloc_failures);
1749fc_host_statistic(fcp_packet_aborts);
1750fc_host_statistic(fcp_frame_alloc_failures);
1751fc_host_statistic(fc_no_free_exch);
1752fc_host_statistic(fc_no_free_exch_xid);
1753fc_host_statistic(fc_xid_not_found);
1754fc_host_statistic(fc_xid_busy);
1755fc_host_statistic(fc_seq_not_found);
1756fc_host_statistic(fc_non_bls_resp);
1da177e4
LT		 1757
1758static ssize_t
ee959b00
TJ		 1759fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1760 const char *buf, size_t count)
1da177e4 1761{
ee959b00 1762 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1763 struct fc_internal *i = to_fc_internal(shost->transportt);
1764
1765 /* ignore any data value written to the attribute */
1766 if (i->f->reset_fc_host_stats) {
1767 i->f->reset_fc_host_stats(shost);
1768 return count;
1769 }
1770
1771 return -ENOENT;
1772}
ee959b00 1773static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1da177e4
LT		 1774 fc_reset_statistics);
1775
1da177e4 1776static struct attribute *fc_statistics_attrs[] = {
ee959b00
TJ		 1777 &device_attr_host_seconds_since_last_reset.attr,
1778 &device_attr_host_tx_frames.attr,
1779 &device_attr_host_tx_words.attr,
1780 &device_attr_host_rx_frames.attr,
1781 &device_attr_host_rx_words.attr,
1782 &device_attr_host_lip_count.attr,
1783 &device_attr_host_nos_count.attr,
1784 &device_attr_host_error_frames.attr,
1785 &device_attr_host_dumped_frames.attr,
1786 &device_attr_host_link_failure_count.attr,
1787 &device_attr_host_loss_of_sync_count.attr,
1788 &device_attr_host_loss_of_signal_count.attr,
1789 &device_attr_host_prim_seq_protocol_err_count.attr,
1790 &device_attr_host_invalid_tx_word_count.attr,
1791 &device_attr_host_invalid_crc_count.attr,
1792 &device_attr_host_fcp_input_requests.attr,
1793 &device_attr_host_fcp_output_requests.attr,
1794 &device_attr_host_fcp_control_requests.attr,
1795 &device_attr_host_fcp_input_megabytes.attr,
1796 &device_attr_host_fcp_output_megabytes.attr,
e58abb0c
VD		 1797 &device_attr_host_fcp_packet_alloc_failures.attr,
1798 &device_attr_host_fcp_packet_aborts.attr,
1799 &device_attr_host_fcp_frame_alloc_failures.attr,
1800 &device_attr_host_fc_no_free_exch.attr,
1801 &device_attr_host_fc_no_free_exch_xid.attr,
1802 &device_attr_host_fc_xid_not_found.attr,
1803 &device_attr_host_fc_xid_busy.attr,
1804 &device_attr_host_fc_seq_not_found.attr,
1805 &device_attr_host_fc_non_bls_resp.attr,
ee959b00 1806 &device_attr_host_reset_statistics.attr,
1da177e4
LT		 1807 NULL
1808};
1809
1810static struct attribute_group fc_statistics_group = {
1811 .name = "statistics",
1812 .attrs = fc_statistics_attrs,
1813};
1814
a53eb5e0
JS		 1815
1816/* Host Vport Attributes */
1817
1818static int
1819fc_parse_wwn(const char *ns, u64 *nm)
1820{
1821 unsigned int i, j;
1822 u8 wwn[8];
1823
1824 memset(wwn, 0, sizeof(wwn));
1825
1826 /* Validate and store the new name */
1827 for (i=0, j=0; i < 16; i++) {
ecc30990
AS		 1828 int value;
1829
1830 value = hex_to_bin(*ns++);
1831 if (value >= 0)
1832 j = (j << 4) | value;
a53eb5e0
JS		 1833 else
1834 return -EINVAL;
1835 if (i % 2) {
1836 wwn[i/2] = j & 0xff;
1837 j = 0;
1838 }
1839 }
1840
1841 *nm = wwn_to_u64(wwn);
1842
1843 return 0;
1844}
1845
1846
1847/*
1848 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1849 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1850 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1851 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1852 */
1853static ssize_t
ee959b00
TJ		 1854store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1855 const char *buf, size_t count)
a53eb5e0 1856{
ee959b00 1857 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1858 struct fc_vport_identifiers vid;
1859 struct fc_vport *vport;
1860 unsigned int cnt=count;
1861 int stat;
1862
1863 memset(&vid, 0, sizeof(vid));
1864
1865 /* count may include a LF at end of string */
1866 if (buf[cnt-1] == '\n')
1867 cnt--;
1868
1869 /* validate we have enough characters for WWPN */
1870 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1871 return -EINVAL;
1872
1873 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1874 if (stat)
1875 return stat;
1876
1877 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1878 if (stat)
1879 return stat;
1880
1881 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1882 vid.vport_type = FC_PORTTYPE_NPIV;
1883 /* vid.symbolic_name is already zero/NULL's */
1884 vid.disable = false; /* always enabled */
1885
1886 /* we only allow support on Channel 0 !!! */
a30c3f69 1887 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
a53eb5e0
JS		 1888 return stat ? stat : count;
1889}
ee959b00 1890static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
a53eb5e0
JS		 1891 store_fc_host_vport_create);
1892
1893
1894/*
1895 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1896 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1897 * The WWNs are specified as hex characters, and may *not* contain
1898 * any prefixes (e.g. 0x, x, etc)
1899 */
1900static ssize_t
ee959b00
TJ		 1901store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1902 const char *buf, size_t count)
a53eb5e0 1903{
ee959b00 1904 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1905 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1906 struct fc_vport *vport;
1907 u64 wwpn, wwnn;
1908 unsigned long flags;
1909 unsigned int cnt=count;
1910 int stat, match;
1911
1912 /* count may include a LF at end of string */
1913 if (buf[cnt-1] == '\n')
1914 cnt--;
1915
1916 /* validate we have enough characters for WWPN */
1917 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1918 return -EINVAL;
1919
1920 stat = fc_parse_wwn(&buf[0], &wwpn);
1921 if (stat)
1922 return stat;
1923
1924 stat = fc_parse_wwn(&buf[17], &wwnn);
1925 if (stat)
1926 return stat;
1927
1928 spin_lock_irqsave(shost->host_lock, flags);
1929 match = 0;
1930 /* we only allow support on Channel 0 !!! */
1931 list_for_each_entry(vport, &fc_host->vports, peers) {
1932 if ((vport->channel == 0) &&
1933 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
0d9dc7c8
GR		 1934 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1935 break;
1936 vport->flags |= FC_VPORT_DELETING;
a53eb5e0
JS		 1937 match = 1;
1938 break;
1939 }
1940 }
1941 spin_unlock_irqrestore(shost->host_lock, flags);
1942
1943 if (!match)
1944 return -ENODEV;
1945
1946 stat = fc_vport_terminate(vport);
1947 return stat ? stat : count;
1948}
ee959b00 1949static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
a53eb5e0
JS		 1950 store_fc_host_vport_delete);
1951
1952
1da177e4
LT		 1953static int fc_host_match(struct attribute_container *cont,
1954 struct device *dev)
1955{
1956 struct Scsi_Host *shost;
1957 struct fc_internal *i;
1958
1959 if (!scsi_is_host_device(dev))
1960 return 0;
1961
1962 shost = dev_to_shost(dev);
1963 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1964 != &fc_host_class.class)
1965 return 0;
1966
1967 i = to_fc_internal(shost->transportt);
1968
1969 return &i->t.host_attrs.ac == cont;
1970}
1971
1972static int fc_target_match(struct attribute_container *cont,
1973 struct device *dev)
1974{
1975 struct Scsi_Host *shost;
1976 struct fc_internal *i;
1977
1978 if (!scsi_is_target_device(dev))
1979 return 0;
1980
1981 shost = dev_to_shost(dev->parent);
1982 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1983 != &fc_host_class.class)
1984 return 0;
1985
1986 i = to_fc_internal(shost->transportt);
1987
1988 return &i->t.target_attrs.ac == cont;
1989}
1990
1991static void fc_rport_dev_release(struct device *dev)
1992{
1993 struct fc_rport *rport = dev_to_rport(dev);
1994 put_device(dev->parent);
1995 kfree(rport);
1996}
1997
1998int scsi_is_fc_rport(const struct device *dev)
1999{
2000 return dev->release == fc_rport_dev_release;
2001}
2002EXPORT_SYMBOL(scsi_is_fc_rport);
2003
2004static int fc_rport_match(struct attribute_container *cont,
2005 struct device *dev)
2006{
2007 struct Scsi_Host *shost;
2008 struct fc_internal *i;
2009
2010 if (!scsi_is_fc_rport(dev))
2011 return 0;
2012
2013 shost = dev_to_shost(dev->parent);
2014 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2015 != &fc_host_class.class)
2016 return 0;
2017
2018 i = to_fc_internal(shost->transportt);
2019
2020 return &i->rport_attr_cont.ac == cont;
2021}
2022
5c44cd2a 2023
a53eb5e0
JS		 2024static void fc_vport_dev_release(struct device *dev)
2025{
2026 struct fc_vport *vport = dev_to_vport(dev);
2027 put_device(dev->parent); /* release kobj parent */
2028 kfree(vport);
2029}
2030
62055172 2031static int scsi_is_fc_vport(const struct device *dev)
a53eb5e0
JS		 2032{
2033 return dev->release == fc_vport_dev_release;
2034}
a53eb5e0
JS		 2035
2036static int fc_vport_match(struct attribute_container *cont,
2037 struct device *dev)
2038{
2039 struct fc_vport *vport;
2040 struct Scsi_Host *shost;
2041 struct fc_internal *i;
2042
2043 if (!scsi_is_fc_vport(dev))
2044 return 0;
2045 vport = dev_to_vport(dev);
2046
2047 shost = vport_to_shost(vport);
2048 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2049 != &fc_host_class.class)
2050 return 0;
2051
2052 i = to_fc_internal(shost->transportt);
2053 return &i->vport_attr_cont.ac == cont;
2054}
2055
2056
c829c394 2057/**
b6a05c82 2058 * fc_eh_timed_out - FC Transport I/O timeout intercept handler
c829c394
JS		 2059 * @scmd: The SCSI command which timed out
2060 *
2061 * This routine protects against error handlers getting invoked while a
2062 * rport is in a blocked state, typically due to a temporarily loss of
2063 * connectivity. If the error handlers are allowed to proceed, requests
2064 * to abort i/o, reset the target, etc will likely fail as there is no way
2065 * to communicate with the device to perform the requested function. These
2066 * failures may result in the midlayer taking the device offline, requiring
2067 * manual intervention to restore operation.
2068 *
2069 * This routine, called whenever an i/o times out, validates the state of
2070 * the underlying rport. If the rport is blocked, it returns
2071 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2072 * Eventually, either the device will return, or devloss_tmo will fire,
2073 * and when the timeout then fires, it will be handled normally.
2074 * If the rport is not blocked, normal error handling continues.
2075 *
2076 * Notes:
2077 * This routine assumes no locks are held on entry.
eb44820c 2078 */
b6a05c82
CH		 2079enum blk_eh_timer_return
2080fc_eh_timed_out(struct scsi_cmnd *scmd)
c829c394
JS		 2081{
2082 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2083
2084 if (rport->port_state == FC_PORTSTATE_BLOCKED)
242f9dcb 2085 return BLK_EH_RESET_TIMER;
c829c394 2086
242f9dcb 2087 return BLK_EH_NOT_HANDLED;
c829c394 2088}
b6a05c82 2089EXPORT_SYMBOL(fc_eh_timed_out);
c829c394 2090
5c44cd2a 2091/*
bda23253
JS		 2092 * Called by fc_user_scan to locate an rport on the shost that
2093 * matches the channel and target id, and invoke scsi_scan_target()
2094 * on the rport.
5c44cd2a 2095 */
bda23253 2096static void
9cb78c16 2097fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
5c44cd2a
JSEC		 2098{
2099 struct fc_rport *rport;
bda23253
JS		 2100 unsigned long flags;
2101
2102 spin_lock_irqsave(shost->host_lock, flags);
5c44cd2a 2103
e02f3f59
CH		 2104 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2105 if (rport->scsi_target_id == -1)
2106 continue;
5c44cd2a 2107
0d2fcd9f
HR		 2108 if (rport->port_state != FC_PORTSTATE_ONLINE)
2109 continue;
2110
bda23253
JS		 2111 if ((channel == rport->channel) &&
2112 (id == rport->scsi_target_id)) {
2113 spin_unlock_irqrestore(shost->host_lock, flags);
1d645088
HR		 2114 scsi_scan_target(&rport->dev, channel, id, lun,
2115 SCSI_SCAN_MANUAL);
bda23253 2116 return;
e02f3f59
CH		 2117 }
2118 }
2119
bda23253
JS		 2120 spin_unlock_irqrestore(shost->host_lock, flags);
2121}
2122
2123/*
2124 * Called via sysfs scan routines. Necessary, as the FC transport
2125 * wants to place all target objects below the rport object. So this
2126 * routine must invoke the scsi_scan_target() routine with the rport
2127 * object as the parent.
2128 */
2129static int
9cb78c16 2130fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
bda23253
JS		 2131{
2132 uint chlo, chhi;
2133 uint tgtlo, tgthi;
2134
2135 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2136 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2137 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2138 return -EINVAL;
2139
2140 if (channel == SCAN_WILD_CARD) {
2141 chlo = 0;
2142 chhi = shost->max_channel + 1;
2143 } else {
2144 chlo = channel;
2145 chhi = channel + 1;
2146 }
2147
2148 if (id == SCAN_WILD_CARD) {
2149 tgtlo = 0;
2150 tgthi = shost->max_id;
2151 } else {
2152 tgtlo = id;
2153 tgthi = id + 1;
2154 }
2155
2156 for ( ; chlo < chhi; chlo++)
2157 for ( ; tgtlo < tgthi; tgtlo++)
2158 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2159
e02f3f59 2160 return 0;
5c44cd2a
JSEC		 2161}
2162
1da177e4
LT		 2163struct scsi_transport_template *
2164fc_attach_transport(struct fc_function_template *ft)
2165{
1da177e4 2166 int count;
24669f75
JS		 2167 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2168 GFP_KERNEL);
1da177e4
LT		 2169
2170 if (unlikely(!i))
2171 return NULL;
2172
1da177e4
LT		 2173 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2174 i->t.target_attrs.ac.class = &fc_transport_class.class;
2175 i->t.target_attrs.ac.match = fc_target_match;
2176 i->t.target_size = sizeof(struct fc_starget_attrs);
2177 transport_container_register(&i->t.target_attrs);
2178
2179 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2180 i->t.host_attrs.ac.class = &fc_host_class.class;
2181 i->t.host_attrs.ac.match = fc_host_match;
2182 i->t.host_size = sizeof(struct fc_host_attrs);
2183 if (ft->get_fc_host_stats)
2184 i->t.host_attrs.statistics = &fc_statistics_group;
2185 transport_container_register(&i->t.host_attrs);
2186
2187 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2188 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2189 i->rport_attr_cont.ac.match = fc_rport_match;
2190 transport_container_register(&i->rport_attr_cont);
2191
a53eb5e0
JS		 2192 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2193 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2194 i->vport_attr_cont.ac.match = fc_vport_match;
2195 transport_container_register(&i->vport_attr_cont);
2196
1da177e4
LT		 2197 i->f = ft;
2198
2199 /* Transport uses the shost workq for scsi scanning */
2200 i->t.create_work_queue = 1;
5c44cd2a 2201
e02f3f59 2202 i->t.user_scan = fc_user_scan;
9ef3e4a4 2203
1da177e4
LT		 2204 /*
2205 * Setup SCSI Target Attributes.
2206 */
2207 count = 0;
2208 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2209 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2210 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2211
2212 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2213
2214 i->starget_attrs[count] = NULL;
2215
2216
2217 /*
2218 * Setup SCSI Host Attributes.
2219 */
2220 count=0;
2221 SETUP_HOST_ATTRIBUTE_RD(node_name);
2222 SETUP_HOST_ATTRIBUTE_RD(port_name);
6b7281d0 2223 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1da177e4
LT		 2224 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2225 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1da177e4
LT		 2226 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2227 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
a53eb5e0
JS		 2228 if (ft->vport_create) {
2229 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2230 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2231 }
1da177e4 2232 SETUP_HOST_ATTRIBUTE_RD(serial_number);
bb8ef587
NP		 2233 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2234 SETUP_HOST_ATTRIBUTE_RD(model);
2235 SETUP_HOST_ATTRIBUTE_RD(model_description);
2236 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2237 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2238 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2239 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
1da177e4
LT		 2240
2241 SETUP_HOST_ATTRIBUTE_RD(port_id);
2242 SETUP_HOST_ATTRIBUTE_RD(port_type);
2243 SETUP_HOST_ATTRIBUTE_RD(port_state);
2244 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2245 SETUP_HOST_ATTRIBUTE_RD(speed);
2246 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
016131b8 2247 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
b8d08210 2248 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
1da177e4
LT		 2249
2250 /* Transport-managed attributes */
43ca910a 2251 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
1da177e4 2252 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
91ca7b01
AV		 2253 if (ft->issue_fc_host_lip)
2254 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
a53eb5e0
JS		 2255 if (ft->vport_create)
2256 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2257 if (ft->vport_delete)
2258 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
1da177e4
LT		 2259
2260 BUG_ON(count > FC_HOST_NUM_ATTRS);
2261
2262 i->host_attrs[count] = NULL;
2263
2264 /*
2265 * Setup Remote Port Attributes.
2266 */
2267 count=0;
2268 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2269 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2270 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2271 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2272 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2273 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2274 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2275 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2276 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
fff9d40c 2277 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
1da177e4
LT		 2278
2279 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2280
2281 i->rport_attrs[count] = NULL;
2282
a53eb5e0
JS		 2283 /*
2284 * Setup Virtual Port Attributes.
2285 */
2286 count=0;
2287 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2288 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2289 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2290 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2291 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2292 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2293 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2294 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2295 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2296
2297 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2298
2299 i->vport_attrs[count] = NULL;
2300
1da177e4
LT		 2301 return &i->t;
2302}
2303EXPORT_SYMBOL(fc_attach_transport);
2304
2305void fc_release_transport(struct scsi_transport_template *t)
2306{
2307 struct fc_internal *i = to_fc_internal(t);
2308
2309 transport_container_unregister(&i->t.target_attrs);
2310 transport_container_unregister(&i->t.host_attrs);
2311 transport_container_unregister(&i->rport_attr_cont);
a53eb5e0 2312 transport_container_unregister(&i->vport_attr_cont);
1da177e4
LT		 2313
2314 kfree(i);
2315}
2316EXPORT_SYMBOL(fc_release_transport);
2317
aedf3497
JS		 2318/**
2319 * fc_queue_work - Queue work to the fc_host workqueue.
2320 * @shost: Pointer to Scsi_Host bound to fc_host.
2321 * @work: Work to queue for execution.
2322 *
2323 * Return value:
a0785edf
JS		 2324 * 1 - work queued for execution
2325 * 0 - work is already queued
2326 * -EINVAL - work queue doesn't exist
eb44820c 2327 */
aedf3497
JS		 2328static int
2329fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2330{
2331 if (unlikely(!fc_host_work_q(shost))) {
2332 printk(KERN_ERR
2333 "ERROR: FC host '%s' attempted to queue work, "
2334 "when no workqueue created.\n", shost->hostt->name);
2335 dump_stack();
2336
2337 return -EINVAL;
2338 }
2339
2340 return queue_work(fc_host_work_q(shost), work);
2341}
2342
2343/**
2344 * fc_flush_work - Flush a fc_host's workqueue.
2345 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2346 */
aedf3497
JS		 2347static void
2348fc_flush_work(struct Scsi_Host *shost)
2349{
2350 if (!fc_host_work_q(shost)) {
2351 printk(KERN_ERR
2352 "ERROR: FC host '%s' attempted to flush work, "
2353 "when no workqueue created.\n", shost->hostt->name);
2354 dump_stack();
2355 return;
2356 }
2357
2358 flush_workqueue(fc_host_work_q(shost));
2359}
2360
2361/**
2362 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2363 * @shost: Pointer to Scsi_Host bound to fc_host.
2364 * @work: Work to queue for execution.
2365 * @delay: jiffies to delay the work queuing
2366 *
2367 * Return value:
0f29b966 2368 * 1 on success / 0 already queued / < 0 for error
eb44820c 2369 */
aedf3497 2370static int
c4028958 2371fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
aedf3497
JS		 2372 unsigned long delay)
2373{
2374 if (unlikely(!fc_host_devloss_work_q(shost))) {
2375 printk(KERN_ERR
2376 "ERROR: FC host '%s' attempted to queue work, "
2377 "when no workqueue created.\n", shost->hostt->name);
2378 dump_stack();
2379
2380 return -EINVAL;
2381 }
2382
2383 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2384}
2385
2386/**
2387 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2388 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2389 */
aedf3497
JS		 2390static void
2391fc_flush_devloss(struct Scsi_Host *shost)
2392{
2393 if (!fc_host_devloss_work_q(shost)) {
2394 printk(KERN_ERR
2395 "ERROR: FC host '%s' attempted to flush work, "
2396 "when no workqueue created.\n", shost->hostt->name);
2397 dump_stack();
2398 return;
2399 }
2400
2401 flush_workqueue(fc_host_devloss_work_q(shost));
2402}
2403
1da177e4
LT		 2404
2405/**
eb44820c
RL		 2406 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2407 * @shost: Which &Scsi_Host
1da177e4 2408 *
25985edc 2409 * This routine is expected to be called immediately preceding the
1da177e4
LT		 2410 * a driver's call to scsi_remove_host().
2411 *
2412 * WARNING: A driver utilizing the fc_transport, which fails to call
eb44820c 2413 * this routine prior to scsi_remove_host(), will leave dangling
1da177e4
LT		 2414 * objects in /sys/class/fc_remote_ports. Access to any of these
2415 * objects can result in a system crash !!!
2416 *
2417 * Notes:
2418 * This routine assumes no locks are held on entry.
eb44820c 2419 */
1da177e4
LT		 2420void
2421fc_remove_host(struct Scsi_Host *shost)
2422{
a53eb5e0
JS		 2423 struct fc_vport *vport = NULL, *next_vport = NULL;
2424 struct fc_rport *rport = NULL, *next_rport = NULL;
aedf3497
JS		 2425 struct workqueue_struct *work_q;
2426 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
a53eb5e0 2427 unsigned long flags;
a53eb5e0
JS		 2428
2429 spin_lock_irqsave(shost->host_lock, flags);
2430
2431 /* Remove any vports */
9ef3e4a4
JS		 2432 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2433 fc_queue_work(shost, &vport->vport_delete_work);
1da177e4
LT		 2434
2435 /* Remove any remote ports */
2436 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2437 &fc_host->rports, peers) {
2438 list_del(&rport->peers);
2439 rport->port_state = FC_PORTSTATE_DELETED;
2440 fc_queue_work(shost, &rport->rport_delete_work);
2441 }
2442
1da177e4 2443 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2444 &fc_host->rport_bindings, peers) {
2445 list_del(&rport->peers);
2446 rport->port_state = FC_PORTSTATE_DELETED;
2447 fc_queue_work(shost, &rport->rport_delete_work);
2448 }
2449
a53eb5e0
JS		 2450 spin_unlock_irqrestore(shost->host_lock, flags);
2451
aedf3497
JS		 2452 /* flush all scan work items */
2453 scsi_flush_work(shost);
2454
2455 /* flush all stgt delete, and rport delete work items, then kill it */
2456 if (fc_host->work_q) {
2457 work_q = fc_host->work_q;
2458 fc_host->work_q = NULL;
2459 destroy_workqueue(work_q);
2460 }
2461
2462 /* flush all devloss work items, then kill it */
2463 if (fc_host->devloss_work_q) {
2464 work_q = fc_host->devloss_work_q;
2465 fc_host->devloss_work_q = NULL;
2466 destroy_workqueue(work_q);
2467 }
1da177e4
LT		 2468}
2469EXPORT_SYMBOL(fc_remove_host);
2470
fff9d40c
MC		 2471static void fc_terminate_rport_io(struct fc_rport *rport)
2472{
2473 struct Scsi_Host *shost = rport_to_shost(rport);
2474 struct fc_internal *i = to_fc_internal(shost->transportt);
2475
2476 /* Involve the LLDD if possible to terminate all io on the rport. */
2477 if (i->f->terminate_rport_io)
2478 i->f->terminate_rport_io(rport);
2479
2480 /*
5d9fb5cc 2481 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
fff9d40c 2482 */
5d9fb5cc 2483 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
fff9d40c 2484}
aedf3497
JS		 2485
2486/**
25985edc 2487 * fc_starget_delete - called to delete the scsi descendants of an rport
c4028958 2488 * @work: remote port to be operated on.
eb44820c
RL		 2489 *
2490 * Deletes target and all sdevs.
2491 */
19a7b4ae 2492static void
c4028958 2493fc_starget_delete(struct work_struct *work)
19a7b4ae 2494{
c4028958
DH		 2495 struct fc_rport *rport =
2496 container_of(work, struct fc_rport, stgt_delete_work);
19a7b4ae 2497
fff9d40c 2498 fc_terminate_rport_io(rport);
19a7b4ae
JSEC		 2499 scsi_remove_target(&rport->dev);
2500}
2501
aedf3497
JS		 2502
2503/**
2504 * fc_rport_final_delete - finish rport termination and delete it.
c4028958 2505 * @work: remote port to be deleted.
eb44820c 2506 */
aedf3497 2507static void
c4028958 2508fc_rport_final_delete(struct work_struct *work)
aedf3497 2509{
c4028958
DH		 2510 struct fc_rport *rport =
2511 container_of(work, struct fc_rport, rport_delete_work);
aedf3497
JS		 2512 struct device *dev = &rport->dev;
2513 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2514 struct fc_internal *i = to_fc_internal(shost->transportt);
92740b24 2515 unsigned long flags;
8798a694 2516 int do_callback = 0;
aedf3497 2517
112f661d
NNS		 2518 fc_terminate_rport_io(rport);
2519
aedf3497 2520 /*
9ef3e4a4 2521 * if a scan is pending, flush the SCSI Host work_q so that
aedf3497
JS		 2522 * that we can reclaim the rport scan work element.
2523 */
2524 if (rport->flags & FC_RPORT_SCAN_PENDING)
2525 scsi_flush_work(shost);
2526
92740b24
JS		 2527 /*
2528 * Cancel any outstanding timers. These should really exist
2529 * only when rmmod'ing the LLDD and we're asking for
2530 * immediate termination of the rports
2531 */
2532 spin_lock_irqsave(shost->host_lock, flags);
2533 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2534 spin_unlock_irqrestore(shost->host_lock, flags);
2535 if (!cancel_delayed_work(&rport->fail_io_work))
2536 fc_flush_devloss(shost);
2537 if (!cancel_delayed_work(&rport->dev_loss_work))
2538 fc_flush_devloss(shost);
0353e085 2539 cancel_work_sync(&rport->scan_work);
92740b24
JS		 2540 spin_lock_irqsave(shost->host_lock, flags);
2541 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2542 }
2543 spin_unlock_irqrestore(shost->host_lock, flags);
2544
0f29b966
JS		 2545 /* Delete SCSI target and sdevs */
2546 if (rport->scsi_target_id != -1)
c4028958 2547 fc_starget_delete(&rport->stgt_delete_work);
92740b24
JS		 2548
2549 /*
2550 * Notify the driver that the rport is now dead. The LLDD will
2551 * also guarantee that any communication to the rport is terminated
4be98c0c
JS		 2552 *
2553 * Avoid this call if we already called it when we preserved the
2554 * rport for the binding.
92740b24 2555 */
8798a694 2556 spin_lock_irqsave(shost->host_lock, flags);
4be98c0c 2557 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
8798a694
MR		 2558 (i->f->dev_loss_tmo_callbk)) {
2559 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2560 do_callback = 1;
2561 }
2562 spin_unlock_irqrestore(shost->host_lock, flags);
2563
2564 if (do_callback)
0f29b966 2565 i->f->dev_loss_tmo_callbk(rport);
0f29b966 2566
9e4f5e29
JS		 2567 fc_bsg_remove(rport->rqst_q);
2568
aedf3497
JS		 2569 transport_remove_device(dev);
2570 device_del(dev);
2571 transport_destroy_device(dev);
4cd38e38 2572 scsi_host_put(shost); /* for fc_host->rport list */
3bdad7bd 2573 put_device(dev); /* for self-reference */
aedf3497
JS		 2574}
2575
2576
1da177e4 2577/**
558b88fe 2578 * fc_remote_port_create - allocates and creates a remote FC port.
1da177e4
LT		 2579 * @shost: scsi host the remote port is connected to.
2580 * @channel: Channel on shost port connected to.
2581 * @ids: The world wide names, fc address, and FC4 port
2582 * roles for the remote port.
2583 *
2584 * Allocates and creates the remoter port structure, including the
2585 * class and sysfs creation.
2586 *
2587 * Notes:
2588 * This routine assumes no locks are held on entry.
eb44820c 2589 */
44818efb 2590static struct fc_rport *
558b88fe
HR		 2591fc_remote_port_create(struct Scsi_Host *shost, int channel,
2592 struct fc_rport_identifiers *ids)
1da177e4 2593{
aedf3497 2594 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2595 struct fc_internal *fci = to_fc_internal(shost->transportt);
2596 struct fc_rport *rport;
2597 struct device *dev;
2598 unsigned long flags;
2599 int error;
2600 size_t size;
2601
2602 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
24669f75 2603 rport = kzalloc(size, GFP_KERNEL);
1da177e4 2604 if (unlikely(!rport)) {
cadbd4a5 2605 printk(KERN_ERR "%s: allocation failure\n", __func__);
1da177e4
LT		 2606 return NULL;
2607 }
1da177e4
LT		 2608
2609 rport->maxframe_size = -1;
2610 rport->supported_classes = FC_COS_UNSPECIFIED;
43ca910a 2611 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
1da177e4
LT		 2612 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2613 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2614 rport->port_id = ids->port_id;
2615 rport->roles = ids->roles;
2616 rport->port_state = FC_PORTSTATE_ONLINE;
2617 if (fci->f->dd_fcrport_size)
2618 rport->dd_data = &rport[1];
2619 rport->channel = channel;
0f29b966 2620 rport->fast_io_fail_tmo = -1;
1da177e4 2621
c4028958
DH		 2622 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2623 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2624 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2625 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2626 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
1da177e4
LT		 2627
2628 spin_lock_irqsave(shost->host_lock, flags);
2629
2630 rport->number = fc_host->next_rport_number++;
a53eb5e0 2631 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
1da177e4
LT		 2632 rport->scsi_target_id = fc_host->next_target_id++;
2633 else
2634 rport->scsi_target_id = -1;
aedf3497 2635 list_add_tail(&rport->peers, &fc_host->rports);
4cd38e38 2636 scsi_host_get(shost); /* for fc_host->rport list */
1da177e4
LT		 2637
2638 spin_unlock_irqrestore(shost->host_lock, flags);
2639
2640 dev = &rport->dev;
3bdad7bd
JS		 2641 device_initialize(dev); /* takes self reference */
2642 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
1da177e4 2643 dev->release = fc_rport_dev_release;
71610f55
KS		 2644 dev_set_name(dev, "rport-%d:%d-%d",
2645 shost->host_no, channel, rport->number);
1da177e4
LT		 2646 transport_setup_device(dev);
2647
2648 error = device_add(dev);
2649 if (error) {
2650 printk(KERN_ERR "FC Remote Port device_add failed\n");
2651 goto delete_rport;
2652 }
2653 transport_add_device(dev);
2654 transport_configure_device(dev);
2655
9e4f5e29
JS		 2656 fc_bsg_rportadd(shost, rport);
2657 /* ignore any bsg add error - we just can't do sgio */
2658
a53eb5e0 2659 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
1da177e4 2660 /* initiate a scan of the target */
aedf3497 2661 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2662 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2663 }
1da177e4
LT		 2664
2665 return rport;
2666
2667delete_rport:
2668 transport_destroy_device(dev);
1da177e4
LT		 2669 spin_lock_irqsave(shost->host_lock, flags);
2670 list_del(&rport->peers);
4cd38e38 2671 scsi_host_put(shost); /* for fc_host->rport list */
1da177e4
LT		 2672 spin_unlock_irqrestore(shost->host_lock, flags);
2673 put_device(dev->parent);
2674 kfree(rport);
2675 return NULL;
2676}
2677
2678/**
eb44820c 2679 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
1da177e4
LT		 2680 * @shost: scsi host the remote port is connected to.
2681 * @channel: Channel on shost port connected to.
2682 * @ids: The world wide names, fc address, and FC4 port
2683 * roles for the remote port.
2684 *
2685 * The LLDD calls this routine to notify the transport of the existence
2686 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2687 * of the port, it's FC address (port_id), and the FC4 roles that are
2688 * active for the port.
2689 *
2690 * For ports that are FCP targets (aka scsi targets), the FC transport
2691 * maintains consistent target id bindings on behalf of the LLDD.
2692 * A consistent target id binding is an assignment of a target id to
2693 * a remote port identifier, which persists while the scsi host is
2694 * attached. The remote port can disappear, then later reappear, and
2695 * it's target id assignment remains the same. This allows for shifts
2696 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2697 * changes to the scsi subsystem which is based on scsi host number and
2698 * target id values. Bindings are only valid during the attachment of
2699 * the scsi host. If the host detaches, then later re-attaches, target
2700 * id bindings may change.
2701 *
2702 * This routine is responsible for returning a remote port structure.
2703 * The routine will search the list of remote ports it maintains
2704 * internally on behalf of consistent target id mappings. If found, the
2705 * remote port structure will be reused. Otherwise, a new remote port
2706 * structure will be allocated.
2707 *
2708 * Whenever a remote port is allocated, a new fc_remote_port class
2709 * device is created.
2710 *
2711 * Should not be called from interrupt context.
2712 *
2713 * Notes:
2714 * This routine assumes no locks are held on entry.
eb44820c 2715 */
1da177e4
LT		 2716struct fc_rport *
2717fc_remote_port_add(struct Scsi_Host *shost, int channel,
2718 struct fc_rport_identifiers *ids)
2719{
19a7b4ae 2720 struct fc_internal *fci = to_fc_internal(shost->transportt);
aedf3497 2721 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2722 struct fc_rport *rport;
2723 unsigned long flags;
2724 int match = 0;
2725
aedf3497
JS		 2726 /* ensure any stgt delete functions are done */
2727 fc_flush_work(shost);
2728
19a7b4ae
JSEC		 2729 /*
2730 * Search the list of "active" rports, for an rport that has been
2731 * deleted, but we've held off the real delete while the target
2732 * is in a "blocked" state.
2733 */
2734 spin_lock_irqsave(shost->host_lock, flags);
2735
aedf3497 2736 list_for_each_entry(rport, &fc_host->rports, peers) {
19a7b4ae
JSEC		 2737
2738 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2739 (rport->channel == channel)) {
2740
aedf3497 2741 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 2742 case FC_TGTID_BIND_BY_WWPN:
2743 case FC_TGTID_BIND_NONE:
2744 if (rport->port_name == ids->port_name)
2745 match = 1;
2746 break;
2747 case FC_TGTID_BIND_BY_WWNN:
2748 if (rport->node_name == ids->node_name)
2749 match = 1;
2750 break;
2751 case FC_TGTID_BIND_BY_ID:
2752 if (rport->port_id == ids->port_id)
2753 match = 1;
2754 break;
2755 }
2756
2757 if (match) {
19a7b4ae
JSEC		 2758
2759 memcpy(&rport->node_name, &ids->node_name,
2760 sizeof(rport->node_name));
2761 memcpy(&rport->port_name, &ids->port_name,
2762 sizeof(rport->port_name));
2763 rport->port_id = ids->port_id;
2764
2765 rport->port_state = FC_PORTSTATE_ONLINE;
2766 rport->roles = ids->roles;
2767
2768 spin_unlock_irqrestore(shost->host_lock, flags);
2769
2770 if (fci->f->dd_fcrport_size)
2771 memset(rport->dd_data, 0,
2772 fci->f->dd_fcrport_size);
2773
2774 /*
92740b24
JS		 2775 * If we were not a target, cancel the
2776 * io terminate and rport timers, and
2777 * we're done.
2778 *
2779 * If we were a target, but our new role
2780 * doesn't indicate a target, leave the
2781 * timers running expecting the role to
2782 * change as the target fully logs in. If
2783 * it doesn't, the target will be torn down.
2784 *
2785 * If we were a target, and our role shows
2786 * we're still a target, cancel the timers
2787 * and kick off a scan.
19a7b4ae 2788 */
19a7b4ae 2789
92740b24
JS		 2790 /* was a target, not in roles */
2791 if ((rport->scsi_target_id != -1) &&
a53eb5e0 2792 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
92740b24 2793 return rport;
19a7b4ae
JSEC		 2794
2795 /*
92740b24
JS		 2796 * Stop the fail io and dev_loss timers.
2797 * If they flush, the port_state will
2798 * be checked and will NOOP the function.
19a7b4ae 2799 */
0f29b966
JS		 2800 if (!cancel_delayed_work(&rport->fail_io_work))
2801 fc_flush_devloss(shost);
92740b24 2802 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2803 fc_flush_devloss(shost);
2804
2805 spin_lock_irqsave(shost->host_lock, flags);
2806
fff9d40c 2807 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
4be98c0c
JS		 2808 FC_RPORT_DEVLOSS_PENDING |
2809 FC_RPORT_DEVLOSS_CALLBK_DONE);
19a7b4ae 2810
8fb2ef89
MC		 2811 spin_unlock_irqrestore(shost->host_lock, flags);
2812
92740b24
JS		 2813 /* if target, initiate a scan */
2814 if (rport->scsi_target_id != -1) {
5d9fb5cc
MC		 2815 scsi_target_unblock(&rport->dev,
2816 SDEV_RUNNING);
8fb2ef89
MC		 2817 spin_lock_irqsave(shost->host_lock,
2818 flags);
92740b24
JS		 2819 rport->flags |= FC_RPORT_SCAN_PENDING;
2820 scsi_queue_work(shost,
2821 &rport->scan_work);
2822 spin_unlock_irqrestore(shost->host_lock,
2823 flags);
8fb2ef89 2824 }
a0785edf 2825
9e4f5e29
JS		 2826 fc_bsg_goose_queue(rport);
2827
19a7b4ae
JSEC		 2828 return rport;
2829 }
2830 }
2831 }
2832
92740b24
JS		 2833 /*
2834 * Search the bindings array
2835 * Note: if never a FCP target, you won't be on this list
2836 */
aedf3497 2837 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
1da177e4
LT		 2838
2839 /* search for a matching consistent binding */
2840
aedf3497 2841 list_for_each_entry(rport, &fc_host->rport_bindings,
1da177e4
LT		 2842 peers) {
2843 if (rport->channel != channel)
2844 continue;
2845
aedf3497 2846 switch (fc_host->tgtid_bind_type) {
1da177e4
LT		 2847 case FC_TGTID_BIND_BY_WWPN:
2848 if (rport->port_name == ids->port_name)
2849 match = 1;
2850 break;
2851 case FC_TGTID_BIND_BY_WWNN:
2852 if (rport->node_name == ids->node_name)
2853 match = 1;
2854 break;
2855 case FC_TGTID_BIND_BY_ID:
2856 if (rport->port_id == ids->port_id)
2857 match = 1;
2858 break;
2859 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2860 break;
2861 }
2862
2863 if (match) {
aedf3497 2864 list_move_tail(&rport->peers, &fc_host->rports);
1da177e4
LT		 2865 break;
2866 }
2867 }
2868
1da177e4
LT		 2869 if (match) {
2870 memcpy(&rport->node_name, &ids->node_name,
2871 sizeof(rport->node_name));
2872 memcpy(&rport->port_name, &ids->port_name,
2873 sizeof(rport->port_name));
2874 rport->port_id = ids->port_id;
2875 rport->roles = ids->roles;
2876 rport->port_state = FC_PORTSTATE_ONLINE;
fff9d40c 2877 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 2878
19a7b4ae
JSEC		 2879 if (fci->f->dd_fcrport_size)
2880 memset(rport->dd_data, 0,
2881 fci->f->dd_fcrport_size);
8fb2ef89
MC		 2882 spin_unlock_irqrestore(shost->host_lock, flags);
2883
2884 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
5d9fb5cc 2885 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
19a7b4ae 2886
1da177e4 2887 /* initiate a scan of the target */
8fb2ef89 2888 spin_lock_irqsave(shost->host_lock, flags);
aedf3497 2889 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2890 scsi_queue_work(shost, &rport->scan_work);
a0785edf 2891 spin_unlock_irqrestore(shost->host_lock, flags);
8fb2ef89 2892 }
1da177e4
LT		 2893 return rport;
2894 }
2895 }
2896
19a7b4ae
JSEC		 2897 spin_unlock_irqrestore(shost->host_lock, flags);
2898
1da177e4 2899 /* No consistent binding found - create new remote port entry */
558b88fe 2900 rport = fc_remote_port_create(shost, channel, ids);
1da177e4
LT		 2901
2902 return rport;
2903}
2904EXPORT_SYMBOL(fc_remote_port_add);
2905
1da177e4
LT		 2906
2907/**
eb44820c 2908 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
1da177e4
LT		 2909 * @rport: The remote port that no longer exists
2910 *
2911 * The LLDD calls this routine to notify the transport that a remote
2912 * port is no longer part of the topology. Note: Although a port
2913 * may no longer be part of the topology, it may persist in the remote
19a7b4ae 2914 * ports displayed by the fc_host. We do this under 2 conditions:
eb44820c 2915 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
19a7b4ae
JSEC		 2916 * This allows the port to temporarily disappear, then reappear without
2917 * disrupting the SCSI device tree attached to it. During the "blocked"
2918 * period the port will still exist.
eb44820c 2919 * 2) If the port was a scsi target and disappears for longer than we
19a7b4ae
JSEC		 2920 * expect, we'll delete the port and the tear down the SCSI device tree
2921 * attached to it. However, we want to semi-persist the target id assigned
2922 * to that port if it eventually does exist. The port structure will
2923 * remain (although with minimal information) so that the target id
2924 * bindings remails.
1da177e4
LT		 2925 *
2926 * If the remote port is not an FCP Target, it will be fully torn down
2927 * and deallocated, including the fc_remote_port class device.
2928 *
19a7b4ae
JSEC		 2929 * If the remote port is an FCP Target, the port will be placed in a
2930 * temporary blocked state. From the LLDD's perspective, the rport no
2931 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2932 * exists, but all sdevs on it are blocked from further I/O. The following
eb44820c
RL		 2933 * is then expected.
2934 *
19a7b4ae
JSEC		 2935 * If the remote port does not return (signaled by a LLDD call to
2936 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2937 * scsi target is removed - killing all outstanding i/o and removing the
2938 * scsi devices attached ot it. The port structure will be marked Not
2939 * Present and be partially cleared, leaving only enough information to
2940 * recognize the remote port relative to the scsi target id binding if
2941 * it later appears. The port will remain as long as there is a valid
2942 * binding (e.g. until the user changes the binding type or unloads the
2943 * scsi host with the binding).
1da177e4 2944 *
19a7b4ae
JSEC		 2945 * If the remote port returns within the dev_loss_tmo value (and matches
2946 * according to the target id binding type), the port structure will be
2947 * reused. If it is no longer a SCSI target, the target will be torn
2948 * down. If it continues to be a SCSI target, then the target will be
2949 * unblocked (allowing i/o to be resumed), and a scan will be activated
2950 * to ensure that all luns are detected.
2951 *
2952 * Called from normal process context only - cannot be called from interrupt.
1da177e4
LT		 2953 *
2954 * Notes:
2955 * This routine assumes no locks are held on entry.
eb44820c 2956 */
1da177e4
LT		 2957void
2958fc_remote_port_delete(struct fc_rport *rport)
2959{
aedf3497 2960 struct Scsi_Host *shost = rport_to_shost(rport);
36dd288f 2961 unsigned long timeout = rport->dev_loss_tmo;
aedf3497
JS		 2962 unsigned long flags;
2963
2964 /*
2965 * No need to flush the fc_host work_q's, as all adds are synchronous.
2966 *
2967 * We do need to reclaim the rport scan work element, so eventually
2968 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2969 * there's still a scan pending.
2970 */
2971
2972 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2973
92740b24 2974 if (rport->port_state != FC_PORTSTATE_ONLINE) {
aedf3497 2975 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2976 return;
2977 }
2978
92740b24
JS		 2979 /*
2980 * In the past, we if this was not an FCP-Target, we would
2981 * unconditionally just jump to deleting the rport.
2982 * However, rports can be used as node containers by the LLDD,
2983 * and its not appropriate to just terminate the rport at the
2984 * first sign of a loss in connectivity. The LLDD may want to
2985 * send ELS traffic to re-validate the login. If the rport is
2986 * immediately deleted, it makes it inappropriate for a node
2987 * container.
2988 * So... we now unconditionally wait dev_loss_tmo before
2989 * destroying an rport.
2990 */
2991
aedf3497
JS		 2992 rport->port_state = FC_PORTSTATE_BLOCKED;
2993
2994 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2995
2996 spin_unlock_irqrestore(shost->host_lock, flags);
2997
19a7b4ae 2998 scsi_target_block(&rport->dev);
1da177e4 2999
0f29b966
JS		 3000 /* see if we need to kill io faster than waiting for device loss */
3001 if ((rport->fast_io_fail_tmo != -1) &&
fff9d40c 3002 (rport->fast_io_fail_tmo < timeout))
0f29b966
JS		 3003 fc_queue_devloss_work(shost, &rport->fail_io_work,
3004 rport->fast_io_fail_tmo * HZ);
3005
19a7b4ae 3006 /* cap the length the devices can be blocked until they are deleted */
aedf3497 3007 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
1da177e4
LT		 3008}
3009EXPORT_SYMBOL(fc_remote_port_delete);
3010
3011/**
eb44820c 3012 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
1da177e4 3013 * @rport: The remote port that changed.
eb44820c 3014 * @roles: New roles for this port.
1da177e4 3015 *
eb44820c
RL		 3016 * Description: The LLDD calls this routine to notify the transport that the
3017 * roles on a remote port may have changed. The largest effect of this is
1da177e4
LT		 3018 * if a port now becomes a FCP Target, it must be allocated a
3019 * scsi target id. If the port is no longer a FCP target, any
3020 * scsi target id value assigned to it will persist in case the
3021 * role changes back to include FCP Target. No changes in the scsi
3022 * midlayer will be invoked if the role changes (in the expectation
3023 * that the role will be resumed. If it doesn't normal error processing
3024 * will take place).
3025 *
3026 * Should not be called from interrupt context.
3027 *
3028 * Notes:
3029 * This routine assumes no locks are held on entry.
eb44820c 3030 */
1da177e4
LT		 3031void
3032fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3033{
3034 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 3035 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 3036 unsigned long flags;
3037 int create = 0;
3038
1da177e4 3039 spin_lock_irqsave(shost->host_lock, flags);
a53eb5e0 3040 if (roles & FC_PORT_ROLE_FCP_TARGET) {
19a7b4ae
JSEC		 3041 if (rport->scsi_target_id == -1) {
3042 rport->scsi_target_id = fc_host->next_target_id++;
3043 create = 1;
a53eb5e0 3044 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
19a7b4ae 3045 create = 1;
1da177e4 3046 }
1da177e4 3047
19a7b4ae
JSEC		 3048 rport->roles = roles;
3049
aedf3497
JS		 3050 spin_unlock_irqrestore(shost->host_lock, flags);
3051
19a7b4ae
JSEC		 3052 if (create) {
3053 /*
3054 * There may have been a delete timer running on the
3055 * port. Ensure that it is cancelled as we now know
3056 * the port is an FCP Target.
3057 * Note: we know the rport is exists and in an online
3058 * state as the LLDD would not have had an rport
3059 * reference to pass us.
3060 *
3061 * Take no action on the del_timer failure as the state
3062 * machine state change will validate the
3063 * transaction.
3064 */
0f29b966
JS		 3065 if (!cancel_delayed_work(&rport->fail_io_work))
3066 fc_flush_devloss(shost);
19a7b4ae 3067 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 3068 fc_flush_devloss(shost);
3069
3070 spin_lock_irqsave(shost->host_lock, flags);
fff9d40c 3071 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
0eecee41
JS		 3072 FC_RPORT_DEVLOSS_PENDING |
3073 FC_RPORT_DEVLOSS_CALLBK_DONE);
aedf3497
JS		 3074 spin_unlock_irqrestore(shost->host_lock, flags);
3075
3076 /* ensure any stgt delete functions are done */
3077 fc_flush_work(shost);
19a7b4ae 3078
5d9fb5cc 3079 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
1da177e4 3080 /* initiate a scan of the target */
aedf3497
JS		 3081 spin_lock_irqsave(shost->host_lock, flags);
3082 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 3083 scsi_queue_work(shost, &rport->scan_work);
aedf3497 3084 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae 3085 }
1da177e4
LT		 3086}
3087EXPORT_SYMBOL(fc_remote_port_rolechg);
3088
3089/**
eb44820c 3090 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
92740b24 3091 * @work: rport target that failed to reappear in the allotted time.
eb44820c
RL		 3092 *
3093 * Description: An attempt to delete a remote port blocks, and if it fails
3094 * to return in the allotted time this gets called.
3095 */
1da177e4 3096static void
c4028958 3097fc_timeout_deleted_rport(struct work_struct *work)
1da177e4 3098{
c4028958
DH		 3099 struct fc_rport *rport =
3100 container_of(work, struct fc_rport, dev_loss_work.work);
19a7b4ae 3101 struct Scsi_Host *shost = rport_to_shost(rport);
4be98c0c 3102 struct fc_internal *i = to_fc_internal(shost->transportt);
aedf3497 3103 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
19a7b4ae 3104 unsigned long flags;
8798a694 3105 int do_callback = 0;
1da177e4 3106
19a7b4ae 3107 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 3108
aedf3497
JS		 3109 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3110
1da177e4 3111 /*
92740b24
JS		 3112 * If the port is ONLINE, then it came back. If it was a SCSI
3113 * target, validate it still is. If not, tear down the
3114 * scsi_target on it.
1da177e4 3115 */
aedf3497 3116 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
92740b24 3117 (rport->scsi_target_id != -1) &&
a53eb5e0 3118 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
19a7b4ae 3119 dev_printk(KERN_ERR, &rport->dev,
aedf3497
JS		 3120 "blocked FC remote port time out: no longer"
3121 " a FCP target, removing starget\n");
aedf3497 3122 spin_unlock_irqrestore(shost->host_lock, flags);
5d9fb5cc 3123 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
a0785edf 3124 fc_queue_work(shost, &rport->stgt_delete_work);
19a7b4ae
JSEC		 3125 return;
3126 }
1da177e4 3127
92740b24 3128 /* NOOP state - we're flushing workq's */
19a7b4ae
JSEC		 3129 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3130 spin_unlock_irqrestore(shost->host_lock, flags);
3131 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3132 "blocked FC remote port time out: leaving"
3133 " rport%s alone\n",
3134 (rport->scsi_target_id != -1) ? " and starget" : "");
19a7b4ae
JSEC		 3135 return;
3136 }
1da177e4 3137
92740b24
JS		 3138 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3139 (rport->scsi_target_id == -1)) {
aedf3497
JS		 3140 list_del(&rport->peers);
3141 rport->port_state = FC_PORTSTATE_DELETED;
19a7b4ae 3142 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3143 "blocked FC remote port time out: removing"
3144 " rport%s\n",
3145 (rport->scsi_target_id != -1) ? " and starget" : "");
aedf3497
JS		 3146 fc_queue_work(shost, &rport->rport_delete_work);
3147 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC		 3148 return;
3149 }
1da177e4 3150
19a7b4ae
JSEC		 3151 dev_printk(KERN_ERR, &rport->dev,
3152 "blocked FC remote port time out: removing target and "
3153 "saving binding\n");
3154
aedf3497 3155 list_move_tail(&rport->peers, &fc_host->rport_bindings);
1da177e4
LT		 3156
3157 /*
19a7b4ae
JSEC		 3158 * Note: We do not remove or clear the hostdata area. This allows
3159 * host-specific target data to persist along with the
3160 * scsi_target_id. It's up to the host to manage it's hostdata area.
1da177e4 3161 */
1da177e4 3162
19a7b4ae
JSEC		 3163 /*
3164 * Reinitialize port attributes that may change if the port comes back.
3165 */
3166 rport->maxframe_size = -1;
3167 rport->supported_classes = FC_COS_UNSPECIFIED;
a53eb5e0 3168 rport->roles = FC_PORT_ROLE_UNKNOWN;
aedf3497 3169 rport->port_state = FC_PORTSTATE_NOTPRESENT;
fff9d40c 3170 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 3171
f78badb1
JS		 3172 /*
3173 * Pre-emptively kill I/O rather than waiting for the work queue
3174 * item to teardown the starget. (FCOE libFC folks prefer this
3175 * and to have the rport_port_id still set when it's done).
3176 */
3177 spin_unlock_irqrestore(shost->host_lock, flags);
3178 fc_terminate_rport_io(rport);
3179
8798a694
MR		 3180 spin_lock_irqsave(shost->host_lock, flags);
3181
3182 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
f78badb1 3183
8798a694
MR		 3184 /* remove the identifiers that aren't used in the consisting binding */
3185 switch (fc_host->tgtid_bind_type) {
3186 case FC_TGTID_BIND_BY_WWPN:
3187 rport->node_name = -1;
3188 rport->port_id = -1;
3189 break;
3190 case FC_TGTID_BIND_BY_WWNN:
3191 rport->port_name = -1;
3192 rport->port_id = -1;
3193 break;
3194 case FC_TGTID_BIND_BY_ID:
3195 rport->node_name = -1;
3196 rport->port_name = -1;
3197 break;
3198 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3199 break;
3200 }
3201
3202 /*
3203 * As this only occurs if the remote port (scsi target)
3204 * went away and didn't come back - we'll remove
3205 * all attached scsi devices.
3206 */
3207 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3208 fc_queue_work(shost, &rport->stgt_delete_work);
3209
3210 do_callback = 1;
19a7b4ae
JSEC		 3211 }
3212
8798a694 3213 spin_unlock_irqrestore(shost->host_lock, flags);
4be98c0c
JS		 3214
3215 /*
3216 * Notify the driver that the rport is now dead. The LLDD will
3217 * also guarantee that any communication to the rport is terminated
3218 *
3219 * Note: we set the CALLBK_DONE flag above to correspond
3220 */
8798a694 3221 if (do_callback && i->f->dev_loss_tmo_callbk)
4be98c0c 3222 i->f->dev_loss_tmo_callbk(rport);
1da177e4 3223}
1da177e4 3224
4be98c0c 3225
0f29b966 3226/**
eb44820c 3227 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
c4028958 3228 * @work: rport to terminate io on.
0f29b966
JS		 3229 *
3230 * Notes: Only requests the failure of the io, not that all are flushed
3231 * prior to returning.
eb44820c 3232 */
0f29b966 3233static void
c4028958 3234fc_timeout_fail_rport_io(struct work_struct *work)
0f29b966 3235{
c4028958
DH		 3236 struct fc_rport *rport =
3237 container_of(work, struct fc_rport, fail_io_work.work);
0f29b966
JS		 3238
3239 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3240 return;
3241
fff9d40c
MC		 3242 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3243 fc_terminate_rport_io(rport);
0f29b966
JS		 3244}
3245
1da177e4
LT		 3246/**
3247 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
c4028958 3248 * @work: remote port to be scanned.
eb44820c 3249 */
1da177e4 3250static void
c4028958 3251fc_scsi_scan_rport(struct work_struct *work)
1da177e4 3252{
c4028958
DH		 3253 struct fc_rport *rport =
3254 container_of(work, struct fc_rport, scan_work);
aedf3497 3255 struct Scsi_Host *shost = rport_to_shost(rport);
03f002f7 3256 struct fc_internal *i = to_fc_internal(shost->transportt);
42e33148
JSEC		 3257 unsigned long flags;
3258
aedf3497 3259 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
03f002f7
CS		 3260 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3261 !(i->f->disable_target_scan)) {
aedf3497 3262 scsi_scan_target(&rport->dev, rport->channel,
1d645088
HR		 3263 rport->scsi_target_id, SCAN_WILD_CARD,
3264 SCSI_SCAN_RESCAN);
42e33148 3265 }
aedf3497
JS		 3266
3267 spin_lock_irqsave(shost->host_lock, flags);
3268 rport->flags &= ~FC_RPORT_SCAN_PENDING;
42e33148
JSEC		 3269 spin_unlock_irqrestore(shost->host_lock, flags);
3270}
3271
65d430fa
CS		 3272/**
3273 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3274 * @cmnd: SCSI command that scsi_eh is trying to recover
3275 *
3276 * This routine can be called from a FC LLD scsi_eh callback. It
3277 * blocks the scsi_eh thread until the fc_rport leaves the
2f2eb587
CS		 3278 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3279 * necessary to avoid the scsi_eh failing recovery actions for blocked
3280 * rports which would lead to offlined SCSI devices.
3281 *
3282 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3283 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3284 * passed back to scsi_eh.
65d430fa 3285 */
2f2eb587 3286int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
65d430fa
CS		 3287{
3288 struct Scsi_Host *shost = cmnd->device->host;
3289 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3290 unsigned long flags;
3291
3292 spin_lock_irqsave(shost->host_lock, flags);
2f2eb587
CS		 3293 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3294 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
65d430fa
CS		 3295 spin_unlock_irqrestore(shost->host_lock, flags);
3296 msleep(1000);
3297 spin_lock_irqsave(shost->host_lock, flags);
3298 }
3299 spin_unlock_irqrestore(shost->host_lock, flags);
2f2eb587
CS		 3300
3301 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3302 return FAST_IO_FAIL;
3303
3304 return 0;
65d430fa
CS		 3305}
3306EXPORT_SYMBOL(fc_block_scsi_eh);
42e33148 3307
a53eb5e0 3308/**
a30c3f69 3309 * fc_vport_setup - allocates and creates a FC virtual port.
a53eb5e0
JS		 3310 * @shost: scsi host the virtual port is connected to.
3311 * @channel: Channel on shost port connected to.
3312 * @pdev: parent device for vport
3313 * @ids: The world wide names, FC4 port roles, etc for
3314 * the virtual port.
3315 * @ret_vport: The pointer to the created vport.
3316 *
3317 * Allocates and creates the vport structure, calls the parent host
3318 * to instantiate the vport, the completes w/ class and sysfs creation.
3319 *
3320 * Notes:
3321 * This routine assumes no locks are held on entry.
eb44820c 3322 */
a53eb5e0 3323static int
a30c3f69 3324fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
a53eb5e0
JS		 3325 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3326{
3327 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3328 struct fc_internal *fci = to_fc_internal(shost->transportt);
3329 struct fc_vport *vport;
3330 struct device *dev;
3331 unsigned long flags;
3332 size_t size;
3333 int error;
3334
3335 *ret_vport = NULL;
3336
3337 if ( ! fci->f->vport_create)
3338 return -ENOENT;
3339
3340 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3341 vport = kzalloc(size, GFP_KERNEL);
3342 if (unlikely(!vport)) {
cadbd4a5 3343 printk(KERN_ERR "%s: allocation failure\n", __func__);
a53eb5e0
JS		 3344 return -ENOMEM;
3345 }
3346
3347 vport->vport_state = FC_VPORT_UNKNOWN;
3348 vport->vport_last_state = FC_VPORT_UNKNOWN;
3349 vport->node_name = ids->node_name;
3350 vport->port_name = ids->port_name;
3351 vport->roles = ids->roles;
3352 vport->vport_type = ids->vport_type;
3353 if (fci->f->dd_fcvport_size)
3354 vport->dd_data = &vport[1];
3355 vport->shost = shost;
3356 vport->channel = channel;
3357 vport->flags = FC_VPORT_CREATING;
9ef3e4a4 3358 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
a53eb5e0
JS		 3359
3360 spin_lock_irqsave(shost->host_lock, flags);
3361
3362 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3363 spin_unlock_irqrestore(shost->host_lock, flags);
3364 kfree(vport);
3365 return -ENOSPC;
3366 }
3367 fc_host->npiv_vports_inuse++;
3368 vport->number = fc_host->next_vport_number++;
3369 list_add_tail(&vport->peers, &fc_host->vports);
4cd38e38 3370 scsi_host_get(shost); /* for fc_host->vport list */
a53eb5e0
JS		 3371
3372 spin_unlock_irqrestore(shost->host_lock, flags);
3373
3374 dev = &vport->dev;
3375 device_initialize(dev); /* takes self reference */
3376 dev->parent = get_device(pdev); /* takes parent reference */
3377 dev->release = fc_vport_dev_release;
71610f55
KS		 3378 dev_set_name(dev, "vport-%d:%d-%d",
3379 shost->host_no, channel, vport->number);
a53eb5e0
JS		 3380 transport_setup_device(dev);
3381
3382 error = device_add(dev);
3383 if (error) {
3384 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3385 goto delete_vport;
3386 }
3387 transport_add_device(dev);
3388 transport_configure_device(dev);
3389
3390 error = fci->f->vport_create(vport, ids->disable);
3391 if (error) {
3392 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3393 goto delete_vport_all;
3394 }
3395
3396 /*
3397 * if the parent isn't the physical adapter's Scsi_Host, ensure
3398 * the Scsi_Host at least contains ia symlink to the vport.
3399 */
3400 if (pdev != &shost->shost_gendev) {
3401 error = sysfs_create_link(&shost->shost_gendev.kobj,
71610f55 3402 &dev->kobj, dev_name(dev));
a53eb5e0
JS		 3403 if (error)
3404 printk(KERN_ERR
3405 "%s: Cannot create vport symlinks for "
3406 "%s, err=%d\n",
71610f55 3407 __func__, dev_name(dev), error);
a53eb5e0
JS		 3408 }
3409 spin_lock_irqsave(shost->host_lock, flags);
3410 vport->flags &= ~FC_VPORT_CREATING;
3411 spin_unlock_irqrestore(shost->host_lock, flags);
3412
3413 dev_printk(KERN_NOTICE, pdev,
71610f55 3414 "%s created via shost%d channel %d\n", dev_name(dev),
a53eb5e0
JS		 3415 shost->host_no, channel);
3416
3417 *ret_vport = vport;
3418
3419 return 0;
3420
3421delete_vport_all:
3422 transport_remove_device(dev);
3423 device_del(dev);
3424delete_vport:
3425 transport_destroy_device(dev);
3426 spin_lock_irqsave(shost->host_lock, flags);
3427 list_del(&vport->peers);
4cd38e38 3428 scsi_host_put(shost); /* for fc_host->vport list */
a53eb5e0
JS		 3429 fc_host->npiv_vports_inuse--;
3430 spin_unlock_irqrestore(shost->host_lock, flags);
3431 put_device(dev->parent);
3432 kfree(vport);
3433
3434 return error;
3435}
3436
a30c3f69
AV		 3437/**
3438 * fc_vport_create - Admin App or LLDD requests creation of a vport
3439 * @shost: scsi host the virtual port is connected to.
3440 * @channel: channel on shost port connected to.
3441 * @ids: The world wide names, FC4 port roles, etc for
3442 * the virtual port.
3443 *
3444 * Notes:
3445 * This routine assumes no locks are held on entry.
3446 */
3447struct fc_vport *
3448fc_vport_create(struct Scsi_Host *shost, int channel,
3449 struct fc_vport_identifiers *ids)
3450{
3451 int stat;
3452 struct fc_vport *vport;
3453
3454 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3455 ids, &vport);
3456 return stat ? NULL : vport;
3457}
3458EXPORT_SYMBOL(fc_vport_create);
a53eb5e0
JS		 3459
3460/**
3461 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3462 * @vport: fc_vport to be terminated
3463 *
3464 * Calls the LLDD vport_delete() function, then deallocates and removes
3465 * the vport from the shost and object tree.
3466 *
3467 * Notes:
3468 * This routine assumes no locks are held on entry.
eb44820c 3469 */
a53eb5e0
JS		 3470int
3471fc_vport_terminate(struct fc_vport *vport)
3472{
3473 struct Scsi_Host *shost = vport_to_shost(vport);
3474 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3475 struct fc_internal *i = to_fc_internal(shost->transportt);
3476 struct device *dev = &vport->dev;
3477 unsigned long flags;
3478 int stat;
3479
a53eb5e0
JS		 3480 if (i->f->vport_delete)
3481 stat = i->f->vport_delete(vport);
3482 else
3483 stat = -ENOENT;
3484
3485 spin_lock_irqsave(shost->host_lock, flags);
3486 vport->flags &= ~FC_VPORT_DELETING;
3487 if (!stat) {
3488 vport->flags |= FC_VPORT_DELETED;
3489 list_del(&vport->peers);
3490 fc_host->npiv_vports_inuse--;
4cd38e38 3491 scsi_host_put(shost); /* for fc_host->vport list */
a53eb5e0
JS		 3492 }
3493 spin_unlock_irqrestore(shost->host_lock, flags);
3494
3495 if (stat)
3496 return stat;
3497
3498 if (dev->parent != &shost->shost_gendev)
71610f55 3499 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
a53eb5e0
JS		 3500 transport_remove_device(dev);
3501 device_del(dev);
3502 transport_destroy_device(dev);
3503
3504 /*
3505 * Removing our self-reference should mean our
3506 * release function gets called, which will drop the remaining
3507 * parent reference and free the data structure.
3508 */
3509 put_device(dev); /* for self-reference */
3510
3511 return 0; /* SUCCESS */
3512}
3513EXPORT_SYMBOL(fc_vport_terminate);
3514
9ef3e4a4
JS		 3515/**
3516 * fc_vport_sched_delete - workq-based delete request for a vport
9ef3e4a4 3517 * @work: vport to be deleted.
eb44820c 3518 */
9ef3e4a4
JS		 3519static void
3520fc_vport_sched_delete(struct work_struct *work)
3521{
3522 struct fc_vport *vport =
3523 container_of(work, struct fc_vport, vport_delete_work);
3524 int stat;
3525
3526 stat = fc_vport_terminate(vport);
3527 if (stat)
3528 dev_printk(KERN_ERR, vport->dev.parent,
3529 "%s: %s could not be deleted created via "
cadbd4a5 3530 "shost%d channel %d - error %d\n", __func__,
71610f55 3531 dev_name(&vport->dev), vport->shost->host_no,
9ef3e4a4
JS		 3532 vport->channel, stat);
3533}
3534
a53eb5e0 3535
9e4f5e29
JS		 3536/*
3537 * BSG support
3538 */
3539
9e4f5e29
JS		 3540/**
3541 * fc_bsg_job_timeout - handler for when a bsg request timesout
3542 * @req: request that timed out
3543 */
3544static enum blk_eh_timer_return
3545fc_bsg_job_timeout(struct request *req)
3546{
75cc8cfc 3547 struct bsg_job *job = (void *) req->special;
cd21c605 3548 struct Scsi_Host *shost = fc_bsg_to_shost(job);
1d69b122 3549 struct fc_rport *rport = fc_bsg_to_rport(job);
9e4f5e29 3550 struct fc_internal *i = to_fc_internal(shost->transportt);
ad7660cc 3551 int err = 0, inflight = 0;
9e4f5e29 3552
1d69b122 3553 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
9e4f5e29
JS		 3554 return BLK_EH_RESET_TIMER;
3555
fb6f7c8d 3556 inflight = bsg_job_get(job);
9e4f5e29 3557
ad7660cc 3558 if (inflight && i->f->bsg_timeout) {
9e4f5e29
JS		 3559 /* call LLDD to abort the i/o as it has timed out */
3560 err = i->f->bsg_timeout(job);
b8f08645 3561 if (err == -EAGAIN) {
fb6f7c8d 3562 bsg_job_put(job);
b8f08645
SS		 3563 return BLK_EH_RESET_TIMER;
3564 } else if (err)
9e4f5e29
JS		 3565 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3566 "abort failed with status %d\n", err);
3567 }
3568
9e4f5e29 3569 /* the blk_end_sync_io() doesn't check the error */
ad7660cc 3570 if (!inflight)
47e7e89e
GM		 3571 return BLK_EH_NOT_HANDLED;
3572 else
3573 return BLK_EH_HANDLED;
9e4f5e29
JS		 3574}
3575
9e4f5e29
JS		 3576/**
3577 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3578 * @shost: scsi host rport attached to
3579 * @job: bsg job to be processed
3580 */
a0f4bd7f 3581static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
9e4f5e29
JS		 3582{
3583 struct fc_internal *i = to_fc_internal(shost->transportt);
01e0e15c
JT		 3584 struct fc_bsg_request *bsg_request = job->request;
3585 struct fc_bsg_reply *bsg_reply = job->reply;
9e4f5e29
JS		 3586 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3587 int ret;
3588
01e0e15c
JT		 3589 /* check if we really have all the request data needed */
3590 if (job->request_len < cmdlen) {
3591 ret = -ENOMSG;
3592 goto fail_host_msg;
3593 }
3594
9e4f5e29 3595 /* Validate the host command */
01e0e15c 3596 switch (bsg_request->msgcode) {
9e4f5e29
JS		 3597 case FC_BSG_HST_ADD_RPORT:
3598 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3599 break;
3600
3601 case FC_BSG_HST_DEL_RPORT:
3602 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3603 break;
3604
3605 case FC_BSG_HST_ELS_NOLOGIN:
3606 cmdlen += sizeof(struct fc_bsg_host_els);
3607 /* there better be a xmt and rcv payloads */
3608 if ((!job->request_payload.payload_len) ||
3609 (!job->reply_payload.payload_len)) {
3610 ret = -EINVAL;
3611 goto fail_host_msg;
3612 }
3613 break;
3614
3615 case FC_BSG_HST_CT:
3616 cmdlen += sizeof(struct fc_bsg_host_ct);
3617 /* there better be xmt and rcv payloads */
3618 if ((!job->request_payload.payload_len) ||
3619 (!job->reply_payload.payload_len)) {
3620 ret = -EINVAL;
3621 goto fail_host_msg;
3622 }
3623 break;
3624
3625 case FC_BSG_HST_VENDOR:
3626 cmdlen += sizeof(struct fc_bsg_host_vendor);
3627 if ((shost->hostt->vendor_id == 0L) ||
01e0e15c 3628 (bsg_request->rqst_data.h_vendor.vendor_id !=
9e4f5e29
JS		 3629 shost->hostt->vendor_id)) {
3630 ret = -ESRCH;
3631 goto fail_host_msg;
3632 }
3633 break;
3634
3635 default:
3636 ret = -EBADR;
3637 goto fail_host_msg;
3638 }
3639
9e4f5e29
JS		 3640 ret = i->f->bsg_request(job);
3641 if (!ret)
a0f4bd7f 3642 return 0;
9e4f5e29
JS		 3643
3644fail_host_msg:
3645 /* return the errno failure code as the only status */
3646 BUG_ON(job->reply_len < sizeof(uint32_t));
01e0e15c
JT		 3647 bsg_reply->reply_payload_rcv_len = 0;
3648 bsg_reply->result = ret;
9e4f5e29 3649 job->reply_len = sizeof(uint32_t);
06548160 3650 bsg_job_done(job, bsg_reply->result,
1abaede7 3651 bsg_reply->reply_payload_rcv_len);
a0f4bd7f 3652 return 0;
9e4f5e29
JS		 3653}
3654
3655
3656/*
3657 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3658 * @rport: rport to be restarted
3659 */
3660static void
3661fc_bsg_goose_queue(struct fc_rport *rport)
3662{
378eeade
BVA		 3663 struct request_queue *q = rport->rqst_q;
3664 unsigned long flags;
3665
3666 if (!q)
9e4f5e29
JS		 3667 return;
3668
378eeade
BVA		 3669 spin_lock_irqsave(q->queue_lock, flags);
3670 blk_run_queue_async(q);
3671 spin_unlock_irqrestore(q->queue_lock, flags);
9e4f5e29
JS		 3672}
3673
9e4f5e29
JS		 3674/**
3675 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3676 * @shost: scsi host rport attached to
9e4f5e29
JS		 3677 * @job: bsg job to be processed
3678 */
a0f4bd7f 3679static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
9e4f5e29
JS		 3680{
3681 struct fc_internal *i = to_fc_internal(shost->transportt);
01e0e15c
JT		 3682 struct fc_bsg_request *bsg_request = job->request;
3683 struct fc_bsg_reply *bsg_reply = job->reply;
9e4f5e29
JS		 3684 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3685 int ret;
3686
01e0e15c
JT		 3687 /* check if we really have all the request data needed */
3688 if (job->request_len < cmdlen) {
3689 ret = -ENOMSG;
3690 goto fail_rport_msg;
3691 }
3692
9e4f5e29 3693 /* Validate the rport command */
01e0e15c 3694 switch (bsg_request->msgcode) {
9e4f5e29
JS		 3695 case FC_BSG_RPT_ELS:
3696 cmdlen += sizeof(struct fc_bsg_rport_els);
3697 goto check_bidi;
3698
3699 case FC_BSG_RPT_CT:
3700 cmdlen += sizeof(struct fc_bsg_rport_ct);
3701check_bidi:
3702 /* there better be xmt and rcv payloads */
3703 if ((!job->request_payload.payload_len) ||
3704 (!job->reply_payload.payload_len)) {
3705 ret = -EINVAL;
3706 goto fail_rport_msg;
3707 }
3708 break;
3709 default:
3710 ret = -EBADR;
3711 goto fail_rport_msg;
3712 }
3713
9e4f5e29
JS		 3714 ret = i->f->bsg_request(job);
3715 if (!ret)
a0f4bd7f 3716 return 0;
9e4f5e29
JS		 3717
3718fail_rport_msg:
3719 /* return the errno failure code as the only status */
3720 BUG_ON(job->reply_len < sizeof(uint32_t));
01e0e15c
JT		 3721 bsg_reply->reply_payload_rcv_len = 0;
3722 bsg_reply->result = ret;
9e4f5e29 3723 job->reply_len = sizeof(uint32_t);
06548160 3724 bsg_job_done(job, bsg_reply->result,
1abaede7 3725 bsg_reply->reply_payload_rcv_len);
a0f4bd7f 3726 return 0;
9e4f5e29
JS		 3727}
3728
a0f4bd7f 3729static int fc_bsg_dispatch(struct bsg_job *job)
9e4f5e29 3730{
a0f4bd7f 3731 struct Scsi_Host *shost = fc_bsg_to_shost(job);
9e4f5e29 3732
a0f4bd7f
JT		 3733 if (scsi_is_fc_rport(job->dev))
3734 return fc_bsg_rport_dispatch(shost, job);
3735 else
3736 return fc_bsg_host_dispatch(shost, job);
9e4f5e29
JS		 3737}
3738
9e4f5e29
JS		 3739/**
3740 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3741 * @shost: shost for fc_host
3742 * @fc_host: fc_host adding the structures to
3743 */
3744static int
3745fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3746{
3747 struct device *dev = &shost->shost_gendev;
3748 struct fc_internal *i = to_fc_internal(shost->transportt);
3749 struct request_queue *q;
3c559ea8 3750 char bsg_name[20];
9e4f5e29
JS		 3751
3752 fc_host->rqst_q = NULL;
3753
3754 if (!i->f->bsg_request)
3755 return -ENOTSUPP;
3756
3757 snprintf(bsg_name, sizeof(bsg_name),
3758 "fc_host%d", shost->host_no);
3759
8ae94eb6
CH		 3760 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, i->f->dd_bsg_size);
3761 if (IS_ERR(q)) {
a0f4bd7f
JT		 3762 dev_err(dev,
3763 "fc_host%d: bsg interface failed to initialize - setup queue\n",
3764 shost->host_no);
8ae94eb6 3765 return PTR_ERR(q);
9e4f5e29 3766 }
8ae94eb6 3767 __scsi_init_queue(shost, q);
a0f4bd7f
JT		 3768 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3769 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
9e4f5e29
JS		 3770 fc_host->rqst_q = q;
3771 return 0;
3772}
3773
a0f4bd7f
JT		 3774static int fc_bsg_rport_prep(struct request_queue *q, struct request *req)
3775{
3776 struct fc_rport *rport = dev_to_rport(q->queuedata);
3777
3778 if (rport->port_state == FC_PORTSTATE_BLOCKED &&
3779 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3780 return BLKPREP_DEFER;
3781
3782 if (rport->port_state != FC_PORTSTATE_ONLINE)
3783 return BLKPREP_KILL;
3784
3785 return BLKPREP_OK;
3786}
9e4f5e29
JS		 3787
3788/**
3789 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3790 * @shost: shost that rport is attached to
3791 * @rport: rport that the bsg hooks are being attached to
3792 */
3793static int
3794fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3795{
3796 struct device *dev = &rport->dev;
3797 struct fc_internal *i = to_fc_internal(shost->transportt);
3798 struct request_queue *q;
9e4f5e29
JS		 3799
3800 rport->rqst_q = NULL;
3801
3802 if (!i->f->bsg_request)
3803 return -ENOTSUPP;
3804
8ae94eb6
CH		 3805 q = bsg_setup_queue(dev, NULL, fc_bsg_dispatch, i->f->dd_bsg_size);
3806 if (IS_ERR(q)) {
a0f4bd7f 3807 dev_err(dev, "failed to setup bsg queue\n");
8ae94eb6 3808 return PTR_ERR(q);
9e4f5e29 3809 }
8ae94eb6 3810 __scsi_init_queue(shost, q);
a0f4bd7f
JT		 3811 blk_queue_prep_rq(q, fc_bsg_rport_prep);
3812 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3813 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
9e4f5e29
JS		 3814 rport->rqst_q = q;
3815 return 0;
3816}
3817
3818
3819/**
3820 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3821 * @q: the request_queue that is to be torn down.
78d16341
JS		 3822 *
3823 * Notes:
3824 * Before unregistering the queue empty any requests that are blocked
3825 *
3826 *
9e4f5e29
JS		 3827 */
3828static void
3829fc_bsg_remove(struct request_queue *q)
3830{
3831 if (q) {
3832 bsg_unregister_queue(q);
3833 blk_cleanup_queue(q);
3834 }
3835}
3836
3837
9ef3e4a4
JS		 3838/* Original Author: Martin Hicks */
3839MODULE_AUTHOR("James Smart");
1da177e4
LT		 3840MODULE_DESCRIPTION("FC Transport Attributes");
3841MODULE_LICENSE("GPL");
3842
3843module_init(fc_transport_init);
3844module_exit(fc_transport_exit);
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