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pm8001: Fix potential null pointer dereference and memory leak.
[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>
1da177e4
LT		 33#include <scsi/scsi_device.h>
34#include <scsi/scsi_host.h>
35#include <scsi/scsi_transport.h>
36#include <scsi/scsi_transport_fc.h>
c829c394 37#include <scsi/scsi_cmnd.h>
84314fd4
JS		 38#include <net/netlink.h>
39#include <scsi/scsi_netlink_fc.h>
9e4f5e29 40#include <scsi/scsi_bsg_fc.h>
1da177e4 41#include "scsi_priv.h"
7525236d 42#include "scsi_transport_fc_internal.h"
1da177e4 43
aedf3497 44static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
9ef3e4a4 45static void fc_vport_sched_delete(struct work_struct *work);
a30c3f69 46static int fc_vport_setup(struct Scsi_Host *shost, int channel,
a53eb5e0
JS		 47 struct device *pdev, struct fc_vport_identifiers *ids,
48 struct fc_vport **vport);
9e4f5e29
JS		 49static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
50static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
51static void fc_bsg_remove(struct request_queue *);
52static void fc_bsg_goose_queue(struct fc_rport *);
a53eb5e0 53
43ca910a
MC		 54/*
55 * Module Parameters
56 */
57
58/*
59 * dev_loss_tmo: the default number of seconds that the FC transport
60 * should insulate the loss of a remote port.
61 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
62 */
63static unsigned int fc_dev_loss_tmo = 60; /* seconds */
64
65module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
66MODULE_PARM_DESC(dev_loss_tmo,
67 "Maximum number of seconds that the FC transport should"
68 " insulate the loss of a remote port. Once this value is"
69 " exceeded, the scsi target is removed. Value should be"
70 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
71 " fast_io_fail_tmo is not set.");
72
1da177e4
LT		 73/*
74 * Redefine so that we can have same named attributes in the
75 * sdev/starget/host objects.
76 */
ee959b00
TJ		 77#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
78struct device_attribute device_attr_##_prefix##_##_name = \
1da177e4
LT		 79 __ATTR(_name,_mode,_show,_store)
80
81#define fc_enum_name_search(title, table_type, table) \
82static const char *get_fc_##title##_name(enum table_type table_key) \
83{ \
84 int i; \
85 char *name = NULL; \
86 \
6391a113 87 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 88 if (table[i].value == table_key) { \
89 name = table[i].name; \
90 break; \
91 } \
92 } \
93 return name; \
94}
95
96#define fc_enum_name_match(title, table_type, table) \
97static int get_fc_##title##_match(const char *table_key, \
98 enum table_type *value) \
99{ \
100 int i; \
101 \
6391a113 102 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 103 if (strncmp(table_key, table[i].name, \
104 table[i].matchlen) == 0) { \
105 *value = table[i].value; \
106 return 0; /* success */ \
107 } \
108 } \
109 return 1; /* failure */ \
110}
111
112
113/* Convert fc_port_type values to ascii string name */
114static struct {
115 enum fc_port_type value;
116 char *name;
117} fc_port_type_names[] = {
118 { FC_PORTTYPE_UNKNOWN, "Unknown" },
119 { FC_PORTTYPE_OTHER, "Other" },
120 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
121 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
122 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
123 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
951948a3 124 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
a53eb5e0 125 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
1da177e4
LT		 126};
127fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
128#define FC_PORTTYPE_MAX_NAMELEN 50
129
a53eb5e0
JS		 130/* Reuse fc_port_type enum function for vport_type */
131#define get_fc_vport_type_name get_fc_port_type_name
132
1da177e4 133
84314fd4
JS		 134/* Convert fc_host_event_code values to ascii string name */
135static const struct {
136 enum fc_host_event_code value;
137 char *name;
138} fc_host_event_code_names[] = {
139 { FCH_EVT_LIP, "lip" },
140 { FCH_EVT_LINKUP, "link_up" },
141 { FCH_EVT_LINKDOWN, "link_down" },
142 { FCH_EVT_LIPRESET, "lip_reset" },
143 { FCH_EVT_RSCN, "rscn" },
144 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
145 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
146 { FCH_EVT_PORT_ONLINE, "port_online" },
147 { FCH_EVT_PORT_OFFLINE, "port_offline" },
148 { FCH_EVT_PORT_FABRIC, "port_fabric" },
149 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
150 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
151};
152fc_enum_name_search(host_event_code, fc_host_event_code,
153 fc_host_event_code_names)
154#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
155
156
1da177e4
LT		 157/* Convert fc_port_state values to ascii string name */
158static struct {
159 enum fc_port_state value;
160 char *name;
161} fc_port_state_names[] = {
162 { FC_PORTSTATE_UNKNOWN, "Unknown" },
163 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
164 { FC_PORTSTATE_ONLINE, "Online" },
165 { FC_PORTSTATE_OFFLINE, "Offline" },
166 { FC_PORTSTATE_BLOCKED, "Blocked" },
167 { FC_PORTSTATE_BYPASSED, "Bypassed" },
168 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
169 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
170 { FC_PORTSTATE_ERROR, "Error" },
171 { FC_PORTSTATE_LOOPBACK, "Loopback" },
42e33148 172 { FC_PORTSTATE_DELETED, "Deleted" },
1da177e4
LT		 173};
174fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
175#define FC_PORTSTATE_MAX_NAMELEN 20
176
177
a53eb5e0
JS		 178/* Convert fc_vport_state values to ascii string name */
179static struct {
180 enum fc_vport_state value;
181 char *name;
182} fc_vport_state_names[] = {
183 { FC_VPORT_UNKNOWN, "Unknown" },
184 { FC_VPORT_ACTIVE, "Active" },
185 { FC_VPORT_DISABLED, "Disabled" },
186 { FC_VPORT_LINKDOWN, "Linkdown" },
187 { FC_VPORT_INITIALIZING, "Initializing" },
188 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
189 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
190 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
191 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
192 { FC_VPORT_FAILED, "VPort Failed" },
193};
194fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
195#define FC_VPORTSTATE_MAX_NAMELEN 24
196
197/* Reuse fc_vport_state enum function for vport_last_state */
198#define get_fc_vport_last_state_name get_fc_vport_state_name
199
200
1da177e4 201/* Convert fc_tgtid_binding_type values to ascii string name */
0ad78200 202static const struct {
1da177e4
LT		 203 enum fc_tgtid_binding_type value;
204 char *name;
205 int matchlen;
206} fc_tgtid_binding_type_names[] = {
207 { FC_TGTID_BIND_NONE, "none", 4 },
208 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
209 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
210 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
211};
212fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
213 fc_tgtid_binding_type_names)
214fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
215 fc_tgtid_binding_type_names)
216#define FC_BINDTYPE_MAX_NAMELEN 30
217
218
219#define fc_bitfield_name_search(title, table) \
220static ssize_t \
221get_fc_##title##_names(u32 table_key, char *buf) \
222{ \
223 char *prefix = ""; \
224 ssize_t len = 0; \
225 int i; \
226 \
6391a113 227 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 228 if (table[i].value & table_key) { \
229 len += sprintf(buf + len, "%s%s", \
230 prefix, table[i].name); \
231 prefix = ", "; \
232 } \
233 } \
234 len += sprintf(buf + len, "\n"); \
235 return len; \
236}
237
238
239/* Convert FC_COS bit values to ascii string name */
0ad78200 240static const struct {
1da177e4
LT		 241 u32 value;
242 char *name;
243} fc_cos_names[] = {
244 { FC_COS_CLASS1, "Class 1" },
245 { FC_COS_CLASS2, "Class 2" },
246 { FC_COS_CLASS3, "Class 3" },
247 { FC_COS_CLASS4, "Class 4" },
248 { FC_COS_CLASS6, "Class 6" },
249};
250fc_bitfield_name_search(cos, fc_cos_names)
251
252
253/* Convert FC_PORTSPEED bit values to ascii string name */
0ad78200 254static const struct {
1da177e4
LT		 255 u32 value;
256 char *name;
257} fc_port_speed_names[] = {
258 { FC_PORTSPEED_1GBIT, "1 Gbit" },
259 { FC_PORTSPEED_2GBIT, "2 Gbit" },
260 { FC_PORTSPEED_4GBIT, "4 Gbit" },
261 { FC_PORTSPEED_10GBIT, "10 Gbit" },
c3d2350a
JS		 262 { FC_PORTSPEED_8GBIT, "8 Gbit" },
263 { FC_PORTSPEED_16GBIT, "16 Gbit" },
624f28be 264 { FC_PORTSPEED_32GBIT, "32 Gbit" },
1da177e4
LT		 265 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
266};
267fc_bitfield_name_search(port_speed, fc_port_speed_names)
268
269
270static int
271show_fc_fc4s (char *buf, u8 *fc4_list)
272{
273 int i, len=0;
274
275 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
276 len += sprintf(buf + len , "0x%02x ", *fc4_list);
277 len += sprintf(buf + len, "\n");
278 return len;
279}
280
281
a53eb5e0 282/* Convert FC_PORT_ROLE bit values to ascii string name */
0ad78200 283static const struct {
1da177e4
LT		 284 u32 value;
285 char *name;
a53eb5e0
JS		 286} fc_port_role_names[] = {
287 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
288 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
289 { FC_PORT_ROLE_IP_PORT, "IP Port" },
1da177e4 290};
a53eb5e0 291fc_bitfield_name_search(port_roles, fc_port_role_names)
1da177e4
LT		 292
293/*
294 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
295 */
296#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
297#define FC_WELLKNOWN_ROLE_MASK 0x00000f
298#define FC_FPORT_PORTID 0x00000e
299#define FC_FABCTLR_PORTID 0x00000d
300#define FC_DIRSRVR_PORTID 0x00000c
301#define FC_TIMESRVR_PORTID 0x00000b
302#define FC_MGMTSRVR_PORTID 0x00000a
303
304
c4028958
DH		 305static void fc_timeout_deleted_rport(struct work_struct *work);
306static void fc_timeout_fail_rport_io(struct work_struct *work);
307static void fc_scsi_scan_rport(struct work_struct *work);
1da177e4
LT		 308
309/*
310 * Attribute counts pre object type...
311 * Increase these values if you add attributes
312 */
313#define FC_STARGET_NUM_ATTRS 3
0f29b966 314#define FC_RPORT_NUM_ATTRS 10
a53eb5e0 315#define FC_VPORT_NUM_ATTRS 9
bb8ef587 316#define FC_HOST_NUM_ATTRS 29
1da177e4
LT		 317
318struct fc_internal {
319 struct scsi_transport_template t;
320 struct fc_function_template *f;
321
322 /*
323 * For attributes : each object has :
324 * An array of the actual attributes structures
325 * An array of null-terminated pointers to the attribute
326 * structures - used for mid-layer interaction.
327 *
328 * The attribute containers for the starget and host are are
329 * part of the midlayer. As the remote port is specific to the
330 * fc transport, we must provide the attribute container.
331 */
ee959b00 332 struct device_attribute private_starget_attrs[
1da177e4 333 FC_STARGET_NUM_ATTRS];
ee959b00 334 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
1da177e4 335
ee959b00
TJ		 336 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
337 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
1da177e4
LT		 338
339 struct transport_container rport_attr_cont;
ee959b00
TJ		 340 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
341 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
a53eb5e0
JS		 342
343 struct transport_container vport_attr_cont;
ee959b00
TJ		 344 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
345 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
1da177e4
LT		 346};
347
348#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
349
d0a7e574 350static int fc_target_setup(struct transport_container *tc, struct device *dev,
ee959b00 351 struct device *cdev)
1da177e4
LT		 352{
353 struct scsi_target *starget = to_scsi_target(dev);
354 struct fc_rport *rport = starget_to_rport(starget);
355
356 /*
357 * if parent is remote port, use values from remote port.
358 * Otherwise, this host uses the fc_transport, but not the
359 * remote port interface. As such, initialize to known non-values.
360 */
361 if (rport) {
362 fc_starget_node_name(starget) = rport->node_name;
363 fc_starget_port_name(starget) = rport->port_name;
364 fc_starget_port_id(starget) = rport->port_id;
365 } else {
366 fc_starget_node_name(starget) = -1;
367 fc_starget_port_name(starget) = -1;
368 fc_starget_port_id(starget) = -1;
369 }
370
371 return 0;
372}
373
374static DECLARE_TRANSPORT_CLASS(fc_transport_class,
375 "fc_transport",
376 fc_target_setup,
377 NULL,
378 NULL);
379
d0a7e574 380static int fc_host_setup(struct transport_container *tc, struct device *dev,
ee959b00 381 struct device *cdev)
1da177e4
LT		 382{
383 struct Scsi_Host *shost = dev_to_shost(dev);
aedf3497 384 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4 385
9ef3e4a4 386 /*
1da177e4
LT		 387 * Set default values easily detected by the midlayer as
388 * failure cases. The scsi lldd is responsible for initializing
389 * all transport attributes to valid values per host.
390 */
aedf3497
JS		 391 fc_host->node_name = -1;
392 fc_host->port_name = -1;
393 fc_host->permanent_port_name = -1;
394 fc_host->supported_classes = FC_COS_UNSPECIFIED;
395 memset(fc_host->supported_fc4s, 0,
396 sizeof(fc_host->supported_fc4s));
aedf3497
JS		 397 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
398 fc_host->maxframe_size = -1;
a53eb5e0 399 fc_host->max_npiv_vports = 0;
aedf3497
JS		 400 memset(fc_host->serial_number, 0,
401 sizeof(fc_host->serial_number));
bb8ef587
NP		 402 memset(fc_host->manufacturer, 0,
403 sizeof(fc_host->manufacturer));
404 memset(fc_host->model, 0,
405 sizeof(fc_host->model));
406 memset(fc_host->model_description, 0,
407 sizeof(fc_host->model_description));
408 memset(fc_host->hardware_version, 0,
409 sizeof(fc_host->hardware_version));
410 memset(fc_host->driver_version, 0,
411 sizeof(fc_host->driver_version));
412 memset(fc_host->firmware_version, 0,
413 sizeof(fc_host->firmware_version));
414 memset(fc_host->optionrom_version, 0,
415 sizeof(fc_host->optionrom_version));
aedf3497
JS		 416
417 fc_host->port_id = -1;
418 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
419 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
420 memset(fc_host->active_fc4s, 0,
421 sizeof(fc_host->active_fc4s));
422 fc_host->speed = FC_PORTSPEED_UNKNOWN;
423 fc_host->fabric_name = -1;
b8d08210
JS		 424 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
425 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
aedf3497
JS		 426
427 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
428
429 INIT_LIST_HEAD(&fc_host->rports);
430 INIT_LIST_HEAD(&fc_host->rport_bindings);
a53eb5e0 431 INIT_LIST_HEAD(&fc_host->vports);
aedf3497
JS		 432 fc_host->next_rport_number = 0;
433 fc_host->next_target_id = 0;
a53eb5e0
JS		 434 fc_host->next_vport_number = 0;
435 fc_host->npiv_vports_inuse = 0;
aedf3497 436
aab0de24
KS		 437 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
438 "fc_wq_%d", shost->host_no);
d8537548 439 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
aedf3497
JS		 440 if (!fc_host->work_q)
441 return -ENOMEM;
442
43ca910a 443 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
aab0de24
KS		 444 snprintf(fc_host->devloss_work_q_name,
445 sizeof(fc_host->devloss_work_q_name),
446 "fc_dl_%d", shost->host_no);
d8537548
KC		 447 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
448 fc_host->devloss_work_q_name);
aedf3497
JS		 449 if (!fc_host->devloss_work_q) {
450 destroy_workqueue(fc_host->work_q);
451 fc_host->work_q = NULL;
452 return -ENOMEM;
453 }
454
9e4f5e29
JS		 455 fc_bsg_hostadd(shost, fc_host);
456 /* ignore any bsg add error - we just can't do sgio */
457
458 return 0;
459}
460
461static int fc_host_remove(struct transport_container *tc, struct device *dev,
462 struct device *cdev)
463{
464 struct Scsi_Host *shost = dev_to_shost(dev);
465 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
466
467 fc_bsg_remove(fc_host->rqst_q);
1da177e4
LT		 468 return 0;
469}
470
471static DECLARE_TRANSPORT_CLASS(fc_host_class,
472 "fc_host",
473 fc_host_setup,
9e4f5e29 474 fc_host_remove,
1da177e4
LT		 475 NULL);
476
477/*
478 * Setup and Remove actions for remote ports are handled
479 * in the service functions below.
480 */
481static DECLARE_TRANSPORT_CLASS(fc_rport_class,
482 "fc_remote_ports",
483 NULL,
484 NULL,
485 NULL);
486
a53eb5e0
JS		 487/*
488 * Setup and Remove actions for virtual ports are handled
489 * in the service functions below.
490 */
491static DECLARE_TRANSPORT_CLASS(fc_vport_class,
492 "fc_vports",
493 NULL,
494 NULL,
495 NULL);
496
eb44820c 497/*
84314fd4 498 * Netlink Infrastructure
eb44820c 499 */
84314fd4
JS		 500
501static atomic_t fc_event_seq;
502
503/**
504 * fc_get_event_number - Obtain the next sequential FC event number
505 *
506 * Notes:
eb44820c 507 * We could have inlined this, but it would have required fc_event_seq to
84314fd4
JS		 508 * be exposed. For now, live with the subroutine call.
509 * Atomic used to avoid lock/unlock...
eb44820c 510 */
84314fd4
JS		 511u32
512fc_get_event_number(void)
513{
514 return atomic_add_return(1, &fc_event_seq);
515}
516EXPORT_SYMBOL(fc_get_event_number);
517
518
519/**
520 * fc_host_post_event - called to post an even on an fc_host.
84314fd4
JS		 521 * @shost: host the event occurred on
522 * @event_number: fc event number obtained from get_fc_event_number()
523 * @event_code: fc_host event being posted
524 * @event_data: 32bits of data for the event being posted
525 *
526 * Notes:
527 * This routine assumes no locks are held on entry.
eb44820c 528 */
84314fd4
JS		 529void
530fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
531 enum fc_host_event_code event_code, u32 event_data)
532{
533 struct sk_buff *skb;
534 struct nlmsghdr *nlh;
535 struct fc_nl_event *event;
536 const char *name;
e07ebea0 537 u32 len;
84314fd4
JS		 538 int err;
539
540 if (!scsi_nl_sock) {
541 err = -ENOENT;
542 goto send_fail;
543 }
544
545 len = FC_NL_MSGALIGN(sizeof(*event));
84314fd4 546
e07ebea0 547 skb = nlmsg_new(len, GFP_KERNEL);
84314fd4
JS		 548 if (!skb) {
549 err = -ENOBUFS;
550 goto send_fail;
551 }
552
e07ebea0 553 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
84314fd4
JS		 554 if (!nlh) {
555 err = -ENOBUFS;
556 goto send_fail_skb;
557 }
e07ebea0 558 event = nlmsg_data(nlh);
84314fd4
JS		 559
560 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
561 FC_NL_ASYNC_EVENT, len);
562 event->seconds = get_seconds();
563 event->vendor_id = 0;
564 event->host_no = shost->host_no;
565 event->event_datalen = sizeof(u32); /* bytes */
566 event->event_num = event_number;
567 event->event_code = event_code;
568 event->event_data = event_data;
569
ff491a73
PNA		 570 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
571 GFP_KERNEL);
84314fd4
JS		 572 return;
573
574send_fail_skb:
575 kfree_skb(skb);
576send_fail:
577 name = get_fc_host_event_code_name(event_code);
578 printk(KERN_WARNING
579 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
cadbd4a5 580 __func__, shost->host_no,
84314fd4
JS		 581 (name) ? name : "<unknown>", event_data, err);
582 return;
583}
584EXPORT_SYMBOL(fc_host_post_event);
585
586
587/**
eb44820c 588 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
84314fd4
JS		 589 * @shost: host the event occurred on
590 * @event_number: fc event number obtained from get_fc_event_number()
591 * @data_len: amount, in bytes, of vendor unique data
592 * @data_buf: pointer to vendor unique data
eb44820c 593 * @vendor_id: Vendor id
84314fd4
JS		 594 *
595 * Notes:
596 * This routine assumes no locks are held on entry.
eb44820c 597 */
84314fd4
JS		 598void
599fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
f14e2e29 600 u32 data_len, char * data_buf, u64 vendor_id)
84314fd4
JS		 601{
602 struct sk_buff *skb;
603 struct nlmsghdr *nlh;
604 struct fc_nl_event *event;
e07ebea0 605 u32 len;
84314fd4
JS		 606 int err;
607
608 if (!scsi_nl_sock) {
609 err = -ENOENT;
610 goto send_vendor_fail;
611 }
612
613 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
84314fd4 614
e07ebea0 615 skb = nlmsg_new(len, GFP_KERNEL);
84314fd4
JS		 616 if (!skb) {
617 err = -ENOBUFS;
618 goto send_vendor_fail;
619 }
620
e07ebea0 621 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
84314fd4
JS		 622 if (!nlh) {
623 err = -ENOBUFS;
624 goto send_vendor_fail_skb;
625 }
e07ebea0 626 event = nlmsg_data(nlh);
84314fd4
JS		 627
628 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
629 FC_NL_ASYNC_EVENT, len);
630 event->seconds = get_seconds();
631 event->vendor_id = vendor_id;
632 event->host_no = shost->host_no;
633 event->event_datalen = data_len; /* bytes */
634 event->event_num = event_number;
635 event->event_code = FCH_EVT_VENDOR_UNIQUE;
636 memcpy(&event->event_data, data_buf, data_len);
637
ff491a73
PNA		 638 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
639 GFP_KERNEL);
84314fd4
JS		 640 return;
641
642send_vendor_fail_skb:
643 kfree_skb(skb);
644send_vendor_fail:
645 printk(KERN_WARNING
646 "%s: Dropped Event : host %d vendor_unique - err %d\n",
cadbd4a5 647 __func__, shost->host_no, err);
84314fd4
JS		 648 return;
649}
650EXPORT_SYMBOL(fc_host_post_vendor_event);
651
652
1da177e4
LT		 653
654static __init int fc_transport_init(void)
655{
84314fd4
JS		 656 int error;
657
658 atomic_set(&fc_event_seq, 0);
659
660 error = transport_class_register(&fc_host_class);
a53eb5e0
JS		 661 if (error)
662 return error;
663 error = transport_class_register(&fc_vport_class);
1da177e4 664 if (error)
48de68a4 665 goto unreg_host_class;
1da177e4
LT		 666 error = transport_class_register(&fc_rport_class);
667 if (error)
48de68a4
MC		 668 goto unreg_vport_class;
669 error = transport_class_register(&fc_transport_class);
670 if (error)
671 goto unreg_rport_class;
672 return 0;
673
674unreg_rport_class:
675 transport_class_unregister(&fc_rport_class);
676unreg_vport_class:
677 transport_class_unregister(&fc_vport_class);
678unreg_host_class:
679 transport_class_unregister(&fc_host_class);
680 return error;
1da177e4
LT		 681}
682
683static void __exit fc_transport_exit(void)
684{
685 transport_class_unregister(&fc_transport_class);
686 transport_class_unregister(&fc_rport_class);
687 transport_class_unregister(&fc_host_class);
a53eb5e0 688 transport_class_unregister(&fc_vport_class);
1da177e4
LT		 689}
690
691/*
692 * FC Remote Port Attribute Management
693 */
694
695#define fc_rport_show_function(field, format_string, sz, cast) \
696static ssize_t \
ee959b00
TJ		 697show_fc_rport_##field (struct device *dev, \
698 struct device_attribute *attr, char *buf) \
1da177e4 699{ \
ee959b00 700 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 701 struct Scsi_Host *shost = rport_to_shost(rport); \
702 struct fc_internal *i = to_fc_internal(shost->transportt); \
19a7b4ae
JSEC		 703 if ((i->f->get_rport_##field) && \
704 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 705 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae 706 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
1da177e4
LT		 707 i->f->get_rport_##field(rport); \
708 return snprintf(buf, sz, format_string, cast rport->field); \
709}
710
711#define fc_rport_store_function(field) \
712static ssize_t \
ee959b00
TJ		 713store_fc_rport_##field(struct device *dev, \
714 struct device_attribute *attr, \
715 const char *buf, size_t count) \
1da177e4
LT		 716{ \
717 int val; \
ee959b00 718 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 719 struct Scsi_Host *shost = rport_to_shost(rport); \
720 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 721 char *cp; \
19a7b4ae 722 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 723 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae
JSEC		 724 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
725 return -EBUSY; \
0f29b966
JS		 726 val = simple_strtoul(buf, &cp, 0); \
727 if (*cp && (*cp != '\n')) \
728 return -EINVAL; \
1da177e4
LT		 729 i->f->set_rport_##field(rport, val); \
730 return count; \
731}
732
733#define fc_rport_rd_attr(field, format_string, sz) \
734 fc_rport_show_function(field, format_string, sz, ) \
ee959b00 735static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 736 show_fc_rport_##field, NULL)
737
738#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
739 fc_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 740static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 741 show_fc_rport_##field, NULL)
742
743#define fc_rport_rw_attr(field, format_string, sz) \
744 fc_rport_show_function(field, format_string, sz, ) \
745 fc_rport_store_function(field) \
ee959b00 746static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 747 show_fc_rport_##field, \
748 store_fc_rport_##field)
749
750
751#define fc_private_rport_show_function(field, format_string, sz, cast) \
752static ssize_t \
ee959b00
TJ		 753show_fc_rport_##field (struct device *dev, \
754 struct device_attribute *attr, char *buf) \
1da177e4 755{ \
ee959b00 756 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 757 return snprintf(buf, sz, format_string, cast rport->field); \
758}
759
760#define fc_private_rport_rd_attr(field, format_string, sz) \
761 fc_private_rport_show_function(field, format_string, sz, ) \
ee959b00 762static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 763 show_fc_rport_##field, NULL)
764
765#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
766 fc_private_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 767static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 768 show_fc_rport_##field, NULL)
769
770
771#define fc_private_rport_rd_enum_attr(title, maxlen) \
772static ssize_t \
ee959b00
TJ		 773show_fc_rport_##title (struct device *dev, \
774 struct device_attribute *attr, char *buf) \
1da177e4 775{ \
ee959b00 776 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 777 const char *name; \
778 name = get_fc_##title##_name(rport->title); \
779 if (!name) \
780 return -EINVAL; \
781 return snprintf(buf, maxlen, "%s\n", name); \
782} \
ee959b00 783static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1da177e4
LT		 784 show_fc_rport_##title, NULL)
785
786
787#define SETUP_RPORT_ATTRIBUTE_RD(field) \
ee959b00 788 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 789 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
790 i->private_rport_attrs[count].store = NULL; \
791 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
792 if (i->f->show_rport_##field) \
793 count++
794
795#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
ee959b00 796 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 797 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
798 i->private_rport_attrs[count].store = NULL; \
799 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
800 count++
801
802#define SETUP_RPORT_ATTRIBUTE_RW(field) \
ee959b00 803 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 804 if (!i->f->set_rport_##field) { \
805 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
806 i->private_rport_attrs[count].store = NULL; \
807 } \
808 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
809 if (i->f->show_rport_##field) \
810 count++
811
0f29b966
JS		 812#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
813{ \
ee959b00 814 i->private_rport_attrs[count] = device_attr_rport_##field; \
0f29b966
JS		 815 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
816 count++; \
817}
818
1da177e4
LT		 819
820/* The FC Transport Remote Port Attributes: */
821
822/* Fixed Remote Port Attributes */
823
824fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
825
826static ssize_t
ee959b00
TJ		 827show_fc_rport_supported_classes (struct device *dev,
828 struct device_attribute *attr, char *buf)
1da177e4 829{
ee959b00 830 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 831 if (rport->supported_classes == FC_COS_UNSPECIFIED)
832 return snprintf(buf, 20, "unspecified\n");
833 return get_fc_cos_names(rport->supported_classes, buf);
834}
ee959b00 835static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1da177e4
LT		 836 show_fc_rport_supported_classes, NULL);
837
838/* Dynamic Remote Port Attributes */
839
19a7b4ae
JSEC		 840/*
841 * dev_loss_tmo attribute
842 */
43ca910a
MC		 843static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
844{
845 char *cp;
846
847 *val = simple_strtoul(buf, &cp, 0);
848 if ((*cp && (*cp != '\n')) || (*val < 0))
849 return -EINVAL;
850 /*
851 * Check for overflow; dev_loss_tmo is u32
852 */
853 if (*val > UINT_MAX)
854 return -EINVAL;
855
856 return 0;
857}
858
859static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
860 unsigned long val)
19a7b4ae 861{
19a7b4ae
JSEC		 862 struct Scsi_Host *shost = rport_to_shost(rport);
863 struct fc_internal *i = to_fc_internal(shost->transportt);
43ca910a 864
19a7b4ae 865 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
42e33148 866 (rport->port_state == FC_PORTSTATE_DELETED) ||
19a7b4ae
JSEC		 867 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
868 return -EBUSY;
36dd288f
HR		 869 /*
870 * Check for overflow; dev_loss_tmo is u32
871 */
872 if (val > UINT_MAX)
873 return -EINVAL;
874
f2818663
HR		 875 /*
876 * If fast_io_fail is off we have to cap
877 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
878 */
879 if (rport->fast_io_fail_tmo == -1 &&
880 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
881 return -EINVAL;
882
19a7b4ae 883 i->f->set_rport_dev_loss_tmo(rport, val);
43ca910a
MC		 884 return 0;
885}
886
887fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
888static ssize_t
889store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
890 const char *buf, size_t count)
891{
892 struct fc_rport *rport = transport_class_to_rport(dev);
893 unsigned long val;
894 int rc;
895
896 rc = fc_str_to_dev_loss(buf, &val);
897 if (rc)
898 return rc;
899
900 rc = fc_rport_set_dev_loss_tmo(rport, val);
901 if (rc)
902 return rc;
19a7b4ae
JSEC		 903 return count;
904}
ee959b00 905static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
19a7b4ae 906 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1da177e4
LT		 907
908
909/* Private Remote Port Attributes */
910
911fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
912fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
913fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
914
915static ssize_t
ee959b00
TJ		 916show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
917 char *buf)
1da177e4 918{
ee959b00 919 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 920
921 /* identify any roles that are port_id specific */
922 if ((rport->port_id != -1) &&
923 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
924 FC_WELLKNOWN_PORTID_MASK) {
925 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
926 case FC_FPORT_PORTID:
927 return snprintf(buf, 30, "Fabric Port\n");
928 case FC_FABCTLR_PORTID:
929 return snprintf(buf, 30, "Fabric Controller\n");
930 case FC_DIRSRVR_PORTID:
931 return snprintf(buf, 30, "Directory Server\n");
932 case FC_TIMESRVR_PORTID:
933 return snprintf(buf, 30, "Time Server\n");
934 case FC_MGMTSRVR_PORTID:
935 return snprintf(buf, 30, "Management Server\n");
936 default:
937 return snprintf(buf, 30, "Unknown Fabric Entity\n");
938 }
939 } else {
a53eb5e0 940 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1da177e4 941 return snprintf(buf, 20, "unknown\n");
a53eb5e0 942 return get_fc_port_roles_names(rport->roles, buf);
1da177e4
LT		 943 }
944}
ee959b00 945static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1da177e4
LT		 946 show_fc_rport_roles, NULL);
947
948fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
949fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
950
0f29b966
JS		 951/*
952 * fast_io_fail_tmo attribute
953 */
954static ssize_t
ee959b00
TJ		 955show_fc_rport_fast_io_fail_tmo (struct device *dev,
956 struct device_attribute *attr, char *buf)
0f29b966 957{
ee959b00 958 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 959
960 if (rport->fast_io_fail_tmo == -1)
961 return snprintf(buf, 5, "off\n");
962 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
963}
964
965static ssize_t
ee959b00
TJ		 966store_fc_rport_fast_io_fail_tmo(struct device *dev,
967 struct device_attribute *attr, const char *buf,
968 size_t count)
0f29b966
JS		 969{
970 int val;
971 char *cp;
ee959b00 972 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 973
974 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
975 (rport->port_state == FC_PORTSTATE_DELETED) ||
976 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
977 return -EBUSY;
978 if (strncmp(buf, "off", 3) == 0)
979 rport->fast_io_fail_tmo = -1;
980 else {
981 val = simple_strtoul(buf, &cp, 0);
f2818663
HR		 982 if ((*cp && (*cp != '\n')) || (val < 0))
983 return -EINVAL;
984 /*
985 * Cap fast_io_fail by dev_loss_tmo or
986 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
987 */
988 if ((val >= rport->dev_loss_tmo) ||
989 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
0f29b966 990 return -EINVAL;
f2818663 991
0f29b966
JS		 992 rport->fast_io_fail_tmo = val;
993 }
994 return count;
995}
ee959b00 996static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
0f29b966 997 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1da177e4
LT		 998
999
1000/*
1001 * FC SCSI Target Attribute Management
1002 */
1003
1004/*
1005 * Note: in the target show function we recognize when the remote
732bee7a 1006 * port is in the hierarchy and do not allow the driver to get
1da177e4
LT		 1007 * involved in sysfs functions. The driver only gets involved if
1008 * it's the "old" style that doesn't use rports.
1009 */
1010#define fc_starget_show_function(field, format_string, sz, cast) \
1011static ssize_t \
ee959b00
TJ		 1012show_fc_starget_##field (struct device *dev, \
1013 struct device_attribute *attr, char *buf) \
1da177e4 1014{ \
ee959b00 1015 struct scsi_target *starget = transport_class_to_starget(dev); \
1da177e4
LT		 1016 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1017 struct fc_internal *i = to_fc_internal(shost->transportt); \
1018 struct fc_rport *rport = starget_to_rport(starget); \
1019 if (rport) \
1020 fc_starget_##field(starget) = rport->field; \
1021 else if (i->f->get_starget_##field) \
1022 i->f->get_starget_##field(starget); \
1023 return snprintf(buf, sz, format_string, \
1024 cast fc_starget_##field(starget)); \
1025}
1026
1027#define fc_starget_rd_attr(field, format_string, sz) \
1028 fc_starget_show_function(field, format_string, sz, ) \
ee959b00 1029static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 1030 show_fc_starget_##field, NULL)
1031
1032#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1033 fc_starget_show_function(field, format_string, sz, (cast)) \
ee959b00 1034static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 1035 show_fc_starget_##field, NULL)
1036
1037#define SETUP_STARGET_ATTRIBUTE_RD(field) \
ee959b00 1038 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 1039 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1040 i->private_starget_attrs[count].store = NULL; \
1041 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1042 if (i->f->show_starget_##field) \
1043 count++
1044
1045#define SETUP_STARGET_ATTRIBUTE_RW(field) \
ee959b00 1046 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 1047 if (!i->f->set_starget_##field) { \
1048 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1049 i->private_starget_attrs[count].store = NULL; \
1050 } \
1051 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1052 if (i->f->show_starget_##field) \
1053 count++
1054
1055/* The FC Transport SCSI Target Attributes: */
1056fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1057fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1058fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1059
1060
a53eb5e0
JS		 1061/*
1062 * FC Virtual Port Attribute Management
1063 */
1064
1065#define fc_vport_show_function(field, format_string, sz, cast) \
1066static ssize_t \
ee959b00
TJ		 1067show_fc_vport_##field (struct device *dev, \
1068 struct device_attribute *attr, char *buf) \
a53eb5e0 1069{ \
ee959b00 1070 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1071 struct Scsi_Host *shost = vport_to_shost(vport); \
1072 struct fc_internal *i = to_fc_internal(shost->transportt); \
1073 if ((i->f->get_vport_##field) && \
1074 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1075 i->f->get_vport_##field(vport); \
1076 return snprintf(buf, sz, format_string, cast vport->field); \
1077}
1078
1079#define fc_vport_store_function(field) \
1080static ssize_t \
ee959b00
TJ		 1081store_fc_vport_##field(struct device *dev, \
1082 struct device_attribute *attr, \
1083 const char *buf, size_t count) \
a53eb5e0
JS		 1084{ \
1085 int val; \
ee959b00 1086 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1087 struct Scsi_Host *shost = vport_to_shost(vport); \
1088 struct fc_internal *i = to_fc_internal(shost->transportt); \
1089 char *cp; \
1090 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1091 return -EBUSY; \
1092 val = simple_strtoul(buf, &cp, 0); \
1093 if (*cp && (*cp != '\n')) \
1094 return -EINVAL; \
1095 i->f->set_vport_##field(vport, val); \
1096 return count; \
1097}
1098
1099#define fc_vport_store_str_function(field, slen) \
1100static ssize_t \
ee959b00
TJ		 1101store_fc_vport_##field(struct device *dev, \
1102 struct device_attribute *attr, \
1103 const char *buf, size_t count) \
a53eb5e0 1104{ \
ee959b00 1105 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1106 struct Scsi_Host *shost = vport_to_shost(vport); \
1107 struct fc_internal *i = to_fc_internal(shost->transportt); \
1108 unsigned int cnt=count; \
1109 \
1110 /* count may include a LF at end of string */ \
1111 if (buf[cnt-1] == '\n') \
1112 cnt--; \
1113 if (cnt > ((slen) - 1)) \
1114 return -EINVAL; \
1115 memcpy(vport->field, buf, cnt); \
1116 i->f->set_vport_##field(vport); \
1117 return count; \
1118}
1119
1120#define fc_vport_rd_attr(field, format_string, sz) \
1121 fc_vport_show_function(field, format_string, sz, ) \
ee959b00 1122static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1123 show_fc_vport_##field, NULL)
1124
1125#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1126 fc_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1127static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1128 show_fc_vport_##field, NULL)
1129
1130#define fc_vport_rw_attr(field, format_string, sz) \
1131 fc_vport_show_function(field, format_string, sz, ) \
1132 fc_vport_store_function(field) \
ee959b00 1133static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1134 show_fc_vport_##field, \
1135 store_fc_vport_##field)
1136
1137#define fc_private_vport_show_function(field, format_string, sz, cast) \
1138static ssize_t \
ee959b00
TJ		 1139show_fc_vport_##field (struct device *dev, \
1140 struct device_attribute *attr, char *buf) \
a53eb5e0 1141{ \
ee959b00 1142 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1143 return snprintf(buf, sz, format_string, cast vport->field); \
1144}
1145
1146#define fc_private_vport_store_u32_function(field) \
1147static ssize_t \
ee959b00
TJ		 1148store_fc_vport_##field(struct device *dev, \
1149 struct device_attribute *attr, \
1150 const char *buf, size_t count) \
a53eb5e0
JS		 1151{ \
1152 u32 val; \
ee959b00 1153 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1154 char *cp; \
1155 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1156 return -EBUSY; \
1157 val = simple_strtoul(buf, &cp, 0); \
1158 if (*cp && (*cp != '\n')) \
1159 return -EINVAL; \
1160 vport->field = val; \
1161 return count; \
1162}
1163
1164
1165#define fc_private_vport_rd_attr(field, format_string, sz) \
1166 fc_private_vport_show_function(field, format_string, sz, ) \
ee959b00 1167static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1168 show_fc_vport_##field, NULL)
1169
1170#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1171 fc_private_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1172static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1173 show_fc_vport_##field, NULL)
1174
1175#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1176 fc_private_vport_show_function(field, format_string, sz, ) \
1177 fc_private_vport_store_u32_function(field) \
ee959b00 1178static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1179 show_fc_vport_##field, \
1180 store_fc_vport_##field)
1181
1182
1183#define fc_private_vport_rd_enum_attr(title, maxlen) \
1184static ssize_t \
ee959b00
TJ		 1185show_fc_vport_##title (struct device *dev, \
1186 struct device_attribute *attr, \
1187 char *buf) \
a53eb5e0 1188{ \
ee959b00 1189 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1190 const char *name; \
1191 name = get_fc_##title##_name(vport->title); \
1192 if (!name) \
1193 return -EINVAL; \
1194 return snprintf(buf, maxlen, "%s\n", name); \
1195} \
ee959b00 1196static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
a53eb5e0
JS		 1197 show_fc_vport_##title, NULL)
1198
1199
1200#define SETUP_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1201 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1202 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1203 i->private_vport_attrs[count].store = NULL; \
1204 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1205 if (i->f->get_##field) \
1206 count++
1207 /* NOTE: Above MACRO differs: checks function not show bit */
1208
1209#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1210 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1211 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1212 i->private_vport_attrs[count].store = NULL; \
1213 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1214 count++
1215
1216#define SETUP_VPORT_ATTRIBUTE_WR(field) \
ee959b00 1217 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1218 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1219 if (i->f->field) \
1220 count++
1221 /* NOTE: Above MACRO differs: checks function */
1222
1223#define SETUP_VPORT_ATTRIBUTE_RW(field) \
ee959b00 1224 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1225 if (!i->f->set_vport_##field) { \
1226 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1227 i->private_vport_attrs[count].store = NULL; \
1228 } \
1229 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1230 count++
1231 /* NOTE: Above MACRO differs: does not check show bit */
1232
1233#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1234{ \
ee959b00 1235 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1236 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1237 count++; \
1238}
1239
1240
1241/* The FC Transport Virtual Port Attributes: */
1242
1243/* Fixed Virtual Port Attributes */
1244
1245/* Dynamic Virtual Port Attributes */
1246
1247/* Private Virtual Port Attributes */
1248
1249fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1250fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1251fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1252fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1253
1254static ssize_t
ee959b00
TJ		 1255show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1256 char *buf)
a53eb5e0 1257{
ee959b00 1258 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1259
1260 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1261 return snprintf(buf, 20, "unknown\n");
1262 return get_fc_port_roles_names(vport->roles, buf);
1263}
ee959b00 1264static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
a53eb5e0
JS		 1265
1266fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1267
1268fc_private_vport_show_function(symbolic_name, "%s\n",
1269 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1270fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
ee959b00 1271static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
a53eb5e0
JS		 1272 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1273
1274static ssize_t
ee959b00
TJ		 1275store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1276 const char *buf, size_t count)
a53eb5e0 1277{
ee959b00 1278 struct fc_vport *vport = transport_class_to_vport(dev);
9ef3e4a4 1279 struct Scsi_Host *shost = vport_to_shost(vport);
0d9dc7c8
GR		 1280 unsigned long flags;
1281
1282 spin_lock_irqsave(shost->host_lock, flags);
1283 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1284 spin_unlock_irqrestore(shost->host_lock, flags);
1285 return -EBUSY;
1286 }
1287 vport->flags |= FC_VPORT_DELETING;
1288 spin_unlock_irqrestore(shost->host_lock, flags);
a53eb5e0 1289
9ef3e4a4 1290 fc_queue_work(shost, &vport->vport_delete_work);
a53eb5e0
JS		 1291 return count;
1292}
ee959b00 1293static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
a53eb5e0
JS		 1294 NULL, store_fc_vport_delete);
1295
1296
1297/*
1298 * Enable/Disable vport
1299 * Write "1" to disable, write "0" to enable
1300 */
1301static ssize_t
ee959b00
TJ		 1302store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1303 const char *buf,
a53eb5e0
JS		 1304 size_t count)
1305{
ee959b00 1306 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1307 struct Scsi_Host *shost = vport_to_shost(vport);
1308 struct fc_internal *i = to_fc_internal(shost->transportt);
1309 int stat;
1310
1311 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1312 return -EBUSY;
1313
1314 if (*buf == '0') {
1315 if (vport->vport_state != FC_VPORT_DISABLED)
1316 return -EALREADY;
1317 } else if (*buf == '1') {
1318 if (vport->vport_state == FC_VPORT_DISABLED)
1319 return -EALREADY;
1320 } else
1321 return -EINVAL;
1322
1323 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1324 return stat ? stat : count;
1325}
ee959b00 1326static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
a53eb5e0
JS		 1327 NULL, store_fc_vport_disable);
1328
1329
1da177e4
LT		 1330/*
1331 * Host Attribute Management
1332 */
1333
1334#define fc_host_show_function(field, format_string, sz, cast) \
1335static ssize_t \
ee959b00
TJ		 1336show_fc_host_##field (struct device *dev, \
1337 struct device_attribute *attr, char *buf) \
1da177e4 1338{ \
ee959b00 1339 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1340 struct fc_internal *i = to_fc_internal(shost->transportt); \
1341 if (i->f->get_host_##field) \
1342 i->f->get_host_##field(shost); \
1343 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1344}
1345
1346#define fc_host_store_function(field) \
1347static ssize_t \
ee959b00
TJ		 1348store_fc_host_##field(struct device *dev, \
1349 struct device_attribute *attr, \
1350 const char *buf, size_t count) \
1da177e4
LT		 1351{ \
1352 int val; \
ee959b00 1353 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4 1354 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 1355 char *cp; \
1da177e4 1356 \
0f29b966
JS		 1357 val = simple_strtoul(buf, &cp, 0); \
1358 if (*cp && (*cp != '\n')) \
1359 return -EINVAL; \
1da177e4
LT		 1360 i->f->set_host_##field(shost, val); \
1361 return count; \
1362}
1363
b8d08210
JS		 1364#define fc_host_store_str_function(field, slen) \
1365static ssize_t \
ee959b00
TJ		 1366store_fc_host_##field(struct device *dev, \
1367 struct device_attribute *attr, \
1368 const char *buf, size_t count) \
b8d08210 1369{ \
ee959b00 1370 struct Scsi_Host *shost = transport_class_to_shost(dev); \
b8d08210
JS		 1371 struct fc_internal *i = to_fc_internal(shost->transportt); \
1372 unsigned int cnt=count; \
1373 \
1374 /* count may include a LF at end of string */ \
1375 if (buf[cnt-1] == '\n') \
1376 cnt--; \
1377 if (cnt > ((slen) - 1)) \
1378 return -EINVAL; \
1379 memcpy(fc_host_##field(shost), buf, cnt); \
1380 i->f->set_host_##field(shost); \
1381 return count; \
1382}
1383
1da177e4
LT		 1384#define fc_host_rd_attr(field, format_string, sz) \
1385 fc_host_show_function(field, format_string, sz, ) \
ee959b00 1386static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1387 show_fc_host_##field, NULL)
1388
1389#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1390 fc_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1391static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1392 show_fc_host_##field, NULL)
1393
1394#define fc_host_rw_attr(field, format_string, sz) \
1395 fc_host_show_function(field, format_string, sz, ) \
1396 fc_host_store_function(field) \
ee959b00 1397static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 1398 show_fc_host_##field, \
1399 store_fc_host_##field)
1400
1401#define fc_host_rd_enum_attr(title, maxlen) \
1402static ssize_t \
ee959b00
TJ		 1403show_fc_host_##title (struct device *dev, \
1404 struct device_attribute *attr, char *buf) \
1da177e4 1405{ \
ee959b00 1406 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1407 struct fc_internal *i = to_fc_internal(shost->transportt); \
1408 const char *name; \
1409 if (i->f->get_host_##title) \
1410 i->f->get_host_##title(shost); \
1411 name = get_fc_##title##_name(fc_host_##title(shost)); \
1412 if (!name) \
1413 return -EINVAL; \
1414 return snprintf(buf, maxlen, "%s\n", name); \
1415} \
ee959b00 1416static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1da177e4
LT		 1417
1418#define SETUP_HOST_ATTRIBUTE_RD(field) \
ee959b00 1419 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1420 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1421 i->private_host_attrs[count].store = NULL; \
1422 i->host_attrs[count] = &i->private_host_attrs[count]; \
1423 if (i->f->show_host_##field) \
1424 count++
1425
a53eb5e0 1426#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
ee959b00 1427 i->private_host_attrs[count] = device_attr_host_##field; \
a53eb5e0
JS		 1428 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1429 i->private_host_attrs[count].store = NULL; \
1430 i->host_attrs[count] = &i->private_host_attrs[count]; \
1431 count++
1432
1da177e4 1433#define SETUP_HOST_ATTRIBUTE_RW(field) \
ee959b00 1434 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1435 if (!i->f->set_host_##field) { \
1436 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1437 i->private_host_attrs[count].store = NULL; \
1438 } \
1439 i->host_attrs[count] = &i->private_host_attrs[count]; \
1440 if (i->f->show_host_##field) \
1441 count++
1442
1443
1444#define fc_private_host_show_function(field, format_string, sz, cast) \
1445static ssize_t \
ee959b00
TJ		 1446show_fc_host_##field (struct device *dev, \
1447 struct device_attribute *attr, char *buf) \
1da177e4 1448{ \
ee959b00 1449 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1450 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1451}
1452
1453#define fc_private_host_rd_attr(field, format_string, sz) \
1454 fc_private_host_show_function(field, format_string, sz, ) \
ee959b00 1455static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1456 show_fc_host_##field, NULL)
1457
1458#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1459 fc_private_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1460static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1461 show_fc_host_##field, NULL)
1462
1463#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
ee959b00 1464 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1465 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1466 i->private_host_attrs[count].store = NULL; \
1467 i->host_attrs[count] = &i->private_host_attrs[count]; \
1468 count++
1469
1470#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
91ca7b01 1471{ \
ee959b00 1472 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4 1473 i->host_attrs[count] = &i->private_host_attrs[count]; \
91ca7b01
AV		 1474 count++; \
1475}
1da177e4
LT		 1476
1477
1478/* Fixed Host Attributes */
1479
1480static ssize_t
ee959b00
TJ		 1481show_fc_host_supported_classes (struct device *dev,
1482 struct device_attribute *attr, char *buf)
1da177e4 1483{
ee959b00 1484 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1485
1486 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1487 return snprintf(buf, 20, "unspecified\n");
1488
1489 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1490}
ee959b00 1491static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1da177e4
LT		 1492 show_fc_host_supported_classes, NULL);
1493
1494static ssize_t
ee959b00
TJ		 1495show_fc_host_supported_fc4s (struct device *dev,
1496 struct device_attribute *attr, char *buf)
1da177e4 1497{
ee959b00 1498 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1499 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1500}
ee959b00 1501static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1da177e4
LT		 1502 show_fc_host_supported_fc4s, NULL);
1503
1504static ssize_t
ee959b00
TJ		 1505show_fc_host_supported_speeds (struct device *dev,
1506 struct device_attribute *attr, char *buf)
1da177e4 1507{
ee959b00 1508 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1509
1510 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1511 return snprintf(buf, 20, "unknown\n");
1512
1513 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1514}
ee959b00 1515static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1da177e4
LT		 1516 show_fc_host_supported_speeds, NULL);
1517
1518
1519fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1520fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
6b7281d0
AH		 1521fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1522 unsigned long long);
1da177e4 1523fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
a53eb5e0 1524fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1da177e4 1525fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
bb8ef587
NP		 1526fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1527fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1528fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1529fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1530fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1531fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1532fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1da177e4
LT		 1533
1534
1535/* Dynamic Host Attributes */
1536
1537static ssize_t
ee959b00
TJ		 1538show_fc_host_active_fc4s (struct device *dev,
1539 struct device_attribute *attr, char *buf)
1da177e4 1540{
ee959b00 1541 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1542 struct fc_internal *i = to_fc_internal(shost->transportt);
1543
1544 if (i->f->get_host_active_fc4s)
1545 i->f->get_host_active_fc4s(shost);
1546
1547 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1548}
ee959b00 1549static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1da177e4
LT		 1550 show_fc_host_active_fc4s, NULL);
1551
1552static ssize_t
ee959b00
TJ		 1553show_fc_host_speed (struct device *dev,
1554 struct device_attribute *attr, char *buf)
1da177e4 1555{
ee959b00 1556 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1557 struct fc_internal *i = to_fc_internal(shost->transportt);
1558
1559 if (i->f->get_host_speed)
1560 i->f->get_host_speed(shost);
1561
1562 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1563 return snprintf(buf, 20, "unknown\n");
1564
1565 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1566}
ee959b00 1567static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1da177e4
LT		 1568 show_fc_host_speed, NULL);
1569
1570
1571fc_host_rd_attr(port_id, "0x%06x\n", 20);
1572fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1573fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1574fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
016131b8 1575fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1da177e4 1576
b8d08210
JS		 1577fc_private_host_show_function(system_hostname, "%s\n",
1578 FC_SYMBOLIC_NAME_SIZE + 1, )
1579fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
ee959b00 1580static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
b8d08210
JS		 1581 show_fc_host_system_hostname, store_fc_host_system_hostname);
1582
1da177e4
LT		 1583
1584/* Private Host Attributes */
1585
1586static ssize_t
ee959b00
TJ		 1587show_fc_private_host_tgtid_bind_type(struct device *dev,
1588 struct device_attribute *attr, char *buf)
1da177e4 1589{
ee959b00 1590 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1591 const char *name;
1592
1593 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1594 if (!name)
1595 return -EINVAL;
1596 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1597}
1598
d16794f6
JSEC		 1599#define get_list_head_entry(pos, head, member) \
1600 pos = list_entry((head)->next, typeof(*pos), member)
1601
1da177e4 1602static ssize_t
ee959b00
TJ		 1603store_fc_private_host_tgtid_bind_type(struct device *dev,
1604 struct device_attribute *attr, const char *buf, size_t count)
1da177e4 1605{
ee959b00 1606 struct Scsi_Host *shost = transport_class_to_shost(dev);
d16794f6 1607 struct fc_rport *rport;
1da177e4
LT		 1608 enum fc_tgtid_binding_type val;
1609 unsigned long flags;
1610
1611 if (get_fc_tgtid_bind_type_match(buf, &val))
1612 return -EINVAL;
1613
1614 /* if changing bind type, purge all unused consistent bindings */
1615 if (val != fc_host_tgtid_bind_type(shost)) {
1616 spin_lock_irqsave(shost->host_lock, flags);
d16794f6
JSEC		 1617 while (!list_empty(&fc_host_rport_bindings(shost))) {
1618 get_list_head_entry(rport,
1619 &fc_host_rport_bindings(shost), peers);
aedf3497
JS		 1620 list_del(&rport->peers);
1621 rport->port_state = FC_PORTSTATE_DELETED;
1622 fc_queue_work(shost, &rport->rport_delete_work);
d16794f6 1623 }
1da177e4
LT		 1624 spin_unlock_irqrestore(shost->host_lock, flags);
1625 }
1626
1627 fc_host_tgtid_bind_type(shost) = val;
1628 return count;
1629}
1630
ee959b00 1631static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1da177e4
LT		 1632 show_fc_private_host_tgtid_bind_type,
1633 store_fc_private_host_tgtid_bind_type);
1634
91ca7b01 1635static ssize_t
ee959b00
TJ		 1636store_fc_private_host_issue_lip(struct device *dev,
1637 struct device_attribute *attr, const char *buf, size_t count)
91ca7b01 1638{
ee959b00 1639 struct Scsi_Host *shost = transport_class_to_shost(dev);
91ca7b01
AV		 1640 struct fc_internal *i = to_fc_internal(shost->transportt);
1641 int ret;
1642
1643 /* ignore any data value written to the attribute */
1644 if (i->f->issue_fc_host_lip) {
1645 ret = i->f->issue_fc_host_lip(shost);
1646 return ret ? ret: count;
1647 }
1648
1649 return -ENOENT;
1650}
1651
ee959b00 1652static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
91ca7b01
AV		 1653 store_fc_private_host_issue_lip);
1654
43ca910a
MC		 1655static ssize_t
1656store_fc_private_host_dev_loss_tmo(struct device *dev,
1657 struct device_attribute *attr,
1658 const char *buf, size_t count)
1659{
1660 struct Scsi_Host *shost = transport_class_to_shost(dev);
1661 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1662 struct fc_rport *rport;
1663 unsigned long val, flags;
1664 int rc;
1665
1666 rc = fc_str_to_dev_loss(buf, &val);
1667 if (rc)
1668 return rc;
1669
1670 fc_host_dev_loss_tmo(shost) = val;
1671 spin_lock_irqsave(shost->host_lock, flags);
1672 list_for_each_entry(rport, &fc_host->rports, peers)
1673 fc_rport_set_dev_loss_tmo(rport, val);
1674 spin_unlock_irqrestore(shost->host_lock, flags);
1675 return count;
1676}
a53eb5e0 1677
43ca910a
MC		 1678fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1679static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1680 show_fc_host_dev_loss_tmo,
1681 store_fc_private_host_dev_loss_tmo);
1682
1683fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
a53eb5e0 1684
1da177e4
LT		 1685/*
1686 * Host Statistics Management
1687 */
1688
1689/* Show a given an attribute in the statistics group */
1690static ssize_t
ee959b00 1691fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1da177e4 1692{
ee959b00 1693 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1694 struct fc_internal *i = to_fc_internal(shost->transportt);
1695 struct fc_host_statistics *stats;
1696 ssize_t ret = -ENOENT;
1697
1698 if (offset > sizeof(struct fc_host_statistics) ||
1699 offset % sizeof(u64) != 0)
1700 WARN_ON(1);
1701
1702 if (i->f->get_fc_host_stats) {
1703 stats = (i->f->get_fc_host_stats)(shost);
1704 if (stats)
1705 ret = snprintf(buf, 20, "0x%llx\n",
1706 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1707 }
1708 return ret;
1709}
1710
1711
1712/* generate a read-only statistics attribute */
1713#define fc_host_statistic(name) \
ee959b00
TJ		 1714static ssize_t show_fcstat_##name(struct device *cd, \
1715 struct device_attribute *attr, \
1716 char *buf) \
1da177e4
LT		 1717{ \
1718 return fc_stat_show(cd, buf, \
1719 offsetof(struct fc_host_statistics, name)); \
1720} \
ee959b00 1721static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1da177e4
LT		 1722
1723fc_host_statistic(seconds_since_last_reset);
1724fc_host_statistic(tx_frames);
1725fc_host_statistic(tx_words);
1726fc_host_statistic(rx_frames);
1727fc_host_statistic(rx_words);
1728fc_host_statistic(lip_count);
1729fc_host_statistic(nos_count);
1730fc_host_statistic(error_frames);
1731fc_host_statistic(dumped_frames);
1732fc_host_statistic(link_failure_count);
1733fc_host_statistic(loss_of_sync_count);
1734fc_host_statistic(loss_of_signal_count);
1735fc_host_statistic(prim_seq_protocol_err_count);
1736fc_host_statistic(invalid_tx_word_count);
1737fc_host_statistic(invalid_crc_count);
1738fc_host_statistic(fcp_input_requests);
1739fc_host_statistic(fcp_output_requests);
1740fc_host_statistic(fcp_control_requests);
1741fc_host_statistic(fcp_input_megabytes);
1742fc_host_statistic(fcp_output_megabytes);
e58abb0c
VD		 1743fc_host_statistic(fcp_packet_alloc_failures);
1744fc_host_statistic(fcp_packet_aborts);
1745fc_host_statistic(fcp_frame_alloc_failures);
1746fc_host_statistic(fc_no_free_exch);
1747fc_host_statistic(fc_no_free_exch_xid);
1748fc_host_statistic(fc_xid_not_found);
1749fc_host_statistic(fc_xid_busy);
1750fc_host_statistic(fc_seq_not_found);
1751fc_host_statistic(fc_non_bls_resp);
1da177e4
LT		 1752
1753static ssize_t
ee959b00
TJ		 1754fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1755 const char *buf, size_t count)
1da177e4 1756{
ee959b00 1757 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1758 struct fc_internal *i = to_fc_internal(shost->transportt);
1759
1760 /* ignore any data value written to the attribute */
1761 if (i->f->reset_fc_host_stats) {
1762 i->f->reset_fc_host_stats(shost);
1763 return count;
1764 }
1765
1766 return -ENOENT;
1767}
ee959b00 1768static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1da177e4
LT		 1769 fc_reset_statistics);
1770
1da177e4 1771static struct attribute *fc_statistics_attrs[] = {
ee959b00
TJ		 1772 &device_attr_host_seconds_since_last_reset.attr,
1773 &device_attr_host_tx_frames.attr,
1774 &device_attr_host_tx_words.attr,
1775 &device_attr_host_rx_frames.attr,
1776 &device_attr_host_rx_words.attr,
1777 &device_attr_host_lip_count.attr,
1778 &device_attr_host_nos_count.attr,
1779 &device_attr_host_error_frames.attr,
1780 &device_attr_host_dumped_frames.attr,
1781 &device_attr_host_link_failure_count.attr,
1782 &device_attr_host_loss_of_sync_count.attr,
1783 &device_attr_host_loss_of_signal_count.attr,
1784 &device_attr_host_prim_seq_protocol_err_count.attr,
1785 &device_attr_host_invalid_tx_word_count.attr,
1786 &device_attr_host_invalid_crc_count.attr,
1787 &device_attr_host_fcp_input_requests.attr,
1788 &device_attr_host_fcp_output_requests.attr,
1789 &device_attr_host_fcp_control_requests.attr,
1790 &device_attr_host_fcp_input_megabytes.attr,
1791 &device_attr_host_fcp_output_megabytes.attr,
e58abb0c
VD		 1792 &device_attr_host_fcp_packet_alloc_failures.attr,
1793 &device_attr_host_fcp_packet_aborts.attr,
1794 &device_attr_host_fcp_frame_alloc_failures.attr,
1795 &device_attr_host_fc_no_free_exch.attr,
1796 &device_attr_host_fc_no_free_exch_xid.attr,
1797 &device_attr_host_fc_xid_not_found.attr,
1798 &device_attr_host_fc_xid_busy.attr,
1799 &device_attr_host_fc_seq_not_found.attr,
1800 &device_attr_host_fc_non_bls_resp.attr,
ee959b00 1801 &device_attr_host_reset_statistics.attr,
1da177e4
LT		 1802 NULL
1803};
1804
1805static struct attribute_group fc_statistics_group = {
1806 .name = "statistics",
1807 .attrs = fc_statistics_attrs,
1808};
1809
a53eb5e0
JS		 1810
1811/* Host Vport Attributes */
1812
1813static int
1814fc_parse_wwn(const char *ns, u64 *nm)
1815{
1816 unsigned int i, j;
1817 u8 wwn[8];
1818
1819 memset(wwn, 0, sizeof(wwn));
1820
1821 /* Validate and store the new name */
1822 for (i=0, j=0; i < 16; i++) {
ecc30990
AS		 1823 int value;
1824
1825 value = hex_to_bin(*ns++);
1826 if (value >= 0)
1827 j = (j << 4) | value;
a53eb5e0
JS		 1828 else
1829 return -EINVAL;
1830 if (i % 2) {
1831 wwn[i/2] = j & 0xff;
1832 j = 0;
1833 }
1834 }
1835
1836 *nm = wwn_to_u64(wwn);
1837
1838 return 0;
1839}
1840
1841
1842/*
1843 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1844 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1845 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1846 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1847 */
1848static ssize_t
ee959b00
TJ		 1849store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1850 const char *buf, size_t count)
a53eb5e0 1851{
ee959b00 1852 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1853 struct fc_vport_identifiers vid;
1854 struct fc_vport *vport;
1855 unsigned int cnt=count;
1856 int stat;
1857
1858 memset(&vid, 0, sizeof(vid));
1859
1860 /* count may include a LF at end of string */
1861 if (buf[cnt-1] == '\n')
1862 cnt--;
1863
1864 /* validate we have enough characters for WWPN */
1865 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1866 return -EINVAL;
1867
1868 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1869 if (stat)
1870 return stat;
1871
1872 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1873 if (stat)
1874 return stat;
1875
1876 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1877 vid.vport_type = FC_PORTTYPE_NPIV;
1878 /* vid.symbolic_name is already zero/NULL's */
1879 vid.disable = false; /* always enabled */
1880
1881 /* we only allow support on Channel 0 !!! */
a30c3f69 1882 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
a53eb5e0
JS		 1883 return stat ? stat : count;
1884}
ee959b00 1885static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
a53eb5e0
JS		 1886 store_fc_host_vport_create);
1887
1888
1889/*
1890 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1891 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1892 * The WWNs are specified as hex characters, and may *not* contain
1893 * any prefixes (e.g. 0x, x, etc)
1894 */
1895static ssize_t
ee959b00
TJ		 1896store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1897 const char *buf, size_t count)
a53eb5e0 1898{
ee959b00 1899 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1900 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1901 struct fc_vport *vport;
1902 u64 wwpn, wwnn;
1903 unsigned long flags;
1904 unsigned int cnt=count;
1905 int stat, match;
1906
1907 /* count may include a LF at end of string */
1908 if (buf[cnt-1] == '\n')
1909 cnt--;
1910
1911 /* validate we have enough characters for WWPN */
1912 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1913 return -EINVAL;
1914
1915 stat = fc_parse_wwn(&buf[0], &wwpn);
1916 if (stat)
1917 return stat;
1918
1919 stat = fc_parse_wwn(&buf[17], &wwnn);
1920 if (stat)
1921 return stat;
1922
1923 spin_lock_irqsave(shost->host_lock, flags);
1924 match = 0;
1925 /* we only allow support on Channel 0 !!! */
1926 list_for_each_entry(vport, &fc_host->vports, peers) {
1927 if ((vport->channel == 0) &&
1928 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
0d9dc7c8
GR		 1929 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1930 break;
1931 vport->flags |= FC_VPORT_DELETING;
a53eb5e0
JS		 1932 match = 1;
1933 break;
1934 }
1935 }
1936 spin_unlock_irqrestore(shost->host_lock, flags);
1937
1938 if (!match)
1939 return -ENODEV;
1940
1941 stat = fc_vport_terminate(vport);
1942 return stat ? stat : count;
1943}
ee959b00 1944static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
a53eb5e0
JS		 1945 store_fc_host_vport_delete);
1946
1947
1da177e4
LT		 1948static int fc_host_match(struct attribute_container *cont,
1949 struct device *dev)
1950{
1951 struct Scsi_Host *shost;
1952 struct fc_internal *i;
1953
1954 if (!scsi_is_host_device(dev))
1955 return 0;
1956
1957 shost = dev_to_shost(dev);
1958 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1959 != &fc_host_class.class)
1960 return 0;
1961
1962 i = to_fc_internal(shost->transportt);
1963
1964 return &i->t.host_attrs.ac == cont;
1965}
1966
1967static int fc_target_match(struct attribute_container *cont,
1968 struct device *dev)
1969{
1970 struct Scsi_Host *shost;
1971 struct fc_internal *i;
1972
1973 if (!scsi_is_target_device(dev))
1974 return 0;
1975
1976 shost = dev_to_shost(dev->parent);
1977 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1978 != &fc_host_class.class)
1979 return 0;
1980
1981 i = to_fc_internal(shost->transportt);
1982
1983 return &i->t.target_attrs.ac == cont;
1984}
1985
1986static void fc_rport_dev_release(struct device *dev)
1987{
1988 struct fc_rport *rport = dev_to_rport(dev);
1989 put_device(dev->parent);
1990 kfree(rport);
1991}
1992
1993int scsi_is_fc_rport(const struct device *dev)
1994{
1995 return dev->release == fc_rport_dev_release;
1996}
1997EXPORT_SYMBOL(scsi_is_fc_rport);
1998
1999static int fc_rport_match(struct attribute_container *cont,
2000 struct device *dev)
2001{
2002 struct Scsi_Host *shost;
2003 struct fc_internal *i;
2004
2005 if (!scsi_is_fc_rport(dev))
2006 return 0;
2007
2008 shost = dev_to_shost(dev->parent);
2009 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2010 != &fc_host_class.class)
2011 return 0;
2012
2013 i = to_fc_internal(shost->transportt);
2014
2015 return &i->rport_attr_cont.ac == cont;
2016}
2017
5c44cd2a 2018
a53eb5e0
JS		 2019static void fc_vport_dev_release(struct device *dev)
2020{
2021 struct fc_vport *vport = dev_to_vport(dev);
2022 put_device(dev->parent); /* release kobj parent */
2023 kfree(vport);
2024}
2025
2026int scsi_is_fc_vport(const struct device *dev)
2027{
2028 return dev->release == fc_vport_dev_release;
2029}
2030EXPORT_SYMBOL(scsi_is_fc_vport);
2031
2032static int fc_vport_match(struct attribute_container *cont,
2033 struct device *dev)
2034{
2035 struct fc_vport *vport;
2036 struct Scsi_Host *shost;
2037 struct fc_internal *i;
2038
2039 if (!scsi_is_fc_vport(dev))
2040 return 0;
2041 vport = dev_to_vport(dev);
2042
2043 shost = vport_to_shost(vport);
2044 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2045 != &fc_host_class.class)
2046 return 0;
2047
2048 i = to_fc_internal(shost->transportt);
2049 return &i->vport_attr_cont.ac == cont;
2050}
2051
2052
c829c394
JS		 2053/**
2054 * fc_timed_out - FC Transport I/O timeout intercept handler
c829c394
JS		 2055 * @scmd: The SCSI command which timed out
2056 *
2057 * This routine protects against error handlers getting invoked while a
2058 * rport is in a blocked state, typically due to a temporarily loss of
2059 * connectivity. If the error handlers are allowed to proceed, requests
2060 * to abort i/o, reset the target, etc will likely fail as there is no way
2061 * to communicate with the device to perform the requested function. These
2062 * failures may result in the midlayer taking the device offline, requiring
2063 * manual intervention to restore operation.
2064 *
2065 * This routine, called whenever an i/o times out, validates the state of
2066 * the underlying rport. If the rport is blocked, it returns
2067 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2068 * Eventually, either the device will return, or devloss_tmo will fire,
2069 * and when the timeout then fires, it will be handled normally.
2070 * If the rport is not blocked, normal error handling continues.
2071 *
2072 * Notes:
2073 * This routine assumes no locks are held on entry.
eb44820c 2074 */
242f9dcb 2075static enum blk_eh_timer_return
c829c394
JS		 2076fc_timed_out(struct scsi_cmnd *scmd)
2077{
2078 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2079
2080 if (rport->port_state == FC_PORTSTATE_BLOCKED)
242f9dcb 2081 return BLK_EH_RESET_TIMER;
c829c394 2082
242f9dcb 2083 return BLK_EH_NOT_HANDLED;
c829c394
JS		 2084}
2085
5c44cd2a 2086/*
bda23253
JS		 2087 * Called by fc_user_scan to locate an rport on the shost that
2088 * matches the channel and target id, and invoke scsi_scan_target()
2089 * on the rport.
5c44cd2a 2090 */
bda23253
JS		 2091static void
2092fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
5c44cd2a
JSEC		 2093{
2094 struct fc_rport *rport;
bda23253
JS		 2095 unsigned long flags;
2096
2097 spin_lock_irqsave(shost->host_lock, flags);
5c44cd2a 2098
e02f3f59
CH		 2099 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2100 if (rport->scsi_target_id == -1)
2101 continue;
5c44cd2a 2102
0d2fcd9f
HR		 2103 if (rport->port_state != FC_PORTSTATE_ONLINE)
2104 continue;
2105
bda23253
JS		 2106 if ((channel == rport->channel) &&
2107 (id == rport->scsi_target_id)) {
2108 spin_unlock_irqrestore(shost->host_lock, flags);
2109 scsi_scan_target(&rport->dev, channel, id, lun, 1);
2110 return;
e02f3f59
CH		 2111 }
2112 }
2113
bda23253
JS		 2114 spin_unlock_irqrestore(shost->host_lock, flags);
2115}
2116
2117/*
2118 * Called via sysfs scan routines. Necessary, as the FC transport
2119 * wants to place all target objects below the rport object. So this
2120 * routine must invoke the scsi_scan_target() routine with the rport
2121 * object as the parent.
2122 */
2123static int
2124fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2125{
2126 uint chlo, chhi;
2127 uint tgtlo, tgthi;
2128
2129 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2130 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2131 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2132 return -EINVAL;
2133
2134 if (channel == SCAN_WILD_CARD) {
2135 chlo = 0;
2136 chhi = shost->max_channel + 1;
2137 } else {
2138 chlo = channel;
2139 chhi = channel + 1;
2140 }
2141
2142 if (id == SCAN_WILD_CARD) {
2143 tgtlo = 0;
2144 tgthi = shost->max_id;
2145 } else {
2146 tgtlo = id;
2147 tgthi = id + 1;
2148 }
2149
2150 for ( ; chlo < chhi; chlo++)
2151 for ( ; tgtlo < tgthi; tgtlo++)
2152 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2153
e02f3f59 2154 return 0;
5c44cd2a
JSEC		 2155}
2156
7525236d
FT		 2157static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2158 int result)
2159{
2160 struct fc_internal *i = to_fc_internal(shost->transportt);
2161 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2162}
2163
2164static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2165{
2166 struct fc_internal *i = to_fc_internal(shost->transportt);
2167 return i->f->it_nexus_response(shost, nexus, result);
2168}
2169
1da177e4
LT		 2170struct scsi_transport_template *
2171fc_attach_transport(struct fc_function_template *ft)
2172{
1da177e4 2173 int count;
24669f75
JS		 2174 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2175 GFP_KERNEL);
1da177e4
LT		 2176
2177 if (unlikely(!i))
2178 return NULL;
2179
1da177e4
LT		 2180 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2181 i->t.target_attrs.ac.class = &fc_transport_class.class;
2182 i->t.target_attrs.ac.match = fc_target_match;
2183 i->t.target_size = sizeof(struct fc_starget_attrs);
2184 transport_container_register(&i->t.target_attrs);
2185
2186 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2187 i->t.host_attrs.ac.class = &fc_host_class.class;
2188 i->t.host_attrs.ac.match = fc_host_match;
2189 i->t.host_size = sizeof(struct fc_host_attrs);
2190 if (ft->get_fc_host_stats)
2191 i->t.host_attrs.statistics = &fc_statistics_group;
2192 transport_container_register(&i->t.host_attrs);
2193
2194 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2195 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2196 i->rport_attr_cont.ac.match = fc_rport_match;
2197 transport_container_register(&i->rport_attr_cont);
2198
a53eb5e0
JS		 2199 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2200 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2201 i->vport_attr_cont.ac.match = fc_vport_match;
2202 transport_container_register(&i->vport_attr_cont);
2203
1da177e4
LT		 2204 i->f = ft;
2205
2206 /* Transport uses the shost workq for scsi scanning */
2207 i->t.create_work_queue = 1;
5c44cd2a 2208
c829c394
JS		 2209 i->t.eh_timed_out = fc_timed_out;
2210
e02f3f59 2211 i->t.user_scan = fc_user_scan;
9ef3e4a4 2212
7525236d
FT		 2213 /* target-mode drivers' functions */
2214 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2215 i->t.it_nexus_response = fc_it_nexus_response;
2216
1da177e4
LT		 2217 /*
2218 * Setup SCSI Target Attributes.
2219 */
2220 count = 0;
2221 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2222 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2223 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2224
2225 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2226
2227 i->starget_attrs[count] = NULL;
2228
2229
2230 /*
2231 * Setup SCSI Host Attributes.
2232 */
2233 count=0;
2234 SETUP_HOST_ATTRIBUTE_RD(node_name);
2235 SETUP_HOST_ATTRIBUTE_RD(port_name);
6b7281d0 2236 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1da177e4
LT		 2237 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2238 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1da177e4
LT		 2239 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2240 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
a53eb5e0
JS		 2241 if (ft->vport_create) {
2242 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2243 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2244 }
1da177e4 2245 SETUP_HOST_ATTRIBUTE_RD(serial_number);
bb8ef587
NP		 2246 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2247 SETUP_HOST_ATTRIBUTE_RD(model);
2248 SETUP_HOST_ATTRIBUTE_RD(model_description);
2249 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2250 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2251 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2252 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
1da177e4
LT		 2253
2254 SETUP_HOST_ATTRIBUTE_RD(port_id);
2255 SETUP_HOST_ATTRIBUTE_RD(port_type);
2256 SETUP_HOST_ATTRIBUTE_RD(port_state);
2257 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2258 SETUP_HOST_ATTRIBUTE_RD(speed);
2259 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
016131b8 2260 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
b8d08210 2261 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
1da177e4
LT		 2262
2263 /* Transport-managed attributes */
43ca910a 2264 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
1da177e4 2265 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
91ca7b01
AV		 2266 if (ft->issue_fc_host_lip)
2267 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
a53eb5e0
JS		 2268 if (ft->vport_create)
2269 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2270 if (ft->vport_delete)
2271 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
1da177e4
LT		 2272
2273 BUG_ON(count > FC_HOST_NUM_ATTRS);
2274
2275 i->host_attrs[count] = NULL;
2276
2277 /*
2278 * Setup Remote Port Attributes.
2279 */
2280 count=0;
2281 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2282 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2283 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2284 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2285 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2286 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2287 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2288 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2289 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
fff9d40c 2290 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
1da177e4
LT		 2291
2292 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2293
2294 i->rport_attrs[count] = NULL;
2295
a53eb5e0
JS		 2296 /*
2297 * Setup Virtual Port Attributes.
2298 */
2299 count=0;
2300 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2301 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2302 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2303 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2304 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2305 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2306 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2307 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2308 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2309
2310 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2311
2312 i->vport_attrs[count] = NULL;
2313
1da177e4
LT		 2314 return &i->t;
2315}
2316EXPORT_SYMBOL(fc_attach_transport);
2317
2318void fc_release_transport(struct scsi_transport_template *t)
2319{
2320 struct fc_internal *i = to_fc_internal(t);
2321
2322 transport_container_unregister(&i->t.target_attrs);
2323 transport_container_unregister(&i->t.host_attrs);
2324 transport_container_unregister(&i->rport_attr_cont);
a53eb5e0 2325 transport_container_unregister(&i->vport_attr_cont);
1da177e4
LT		 2326
2327 kfree(i);
2328}
2329EXPORT_SYMBOL(fc_release_transport);
2330
aedf3497
JS		 2331/**
2332 * fc_queue_work - Queue work to the fc_host workqueue.
2333 * @shost: Pointer to Scsi_Host bound to fc_host.
2334 * @work: Work to queue for execution.
2335 *
2336 * Return value:
a0785edf
JS		 2337 * 1 - work queued for execution
2338 * 0 - work is already queued
2339 * -EINVAL - work queue doesn't exist
eb44820c 2340 */
aedf3497
JS		 2341static int
2342fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2343{
2344 if (unlikely(!fc_host_work_q(shost))) {
2345 printk(KERN_ERR
2346 "ERROR: FC host '%s' attempted to queue work, "
2347 "when no workqueue created.\n", shost->hostt->name);
2348 dump_stack();
2349
2350 return -EINVAL;
2351 }
2352
2353 return queue_work(fc_host_work_q(shost), work);
2354}
2355
2356/**
2357 * fc_flush_work - Flush a fc_host's workqueue.
2358 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2359 */
aedf3497
JS		 2360static void
2361fc_flush_work(struct Scsi_Host *shost)
2362{
2363 if (!fc_host_work_q(shost)) {
2364 printk(KERN_ERR
2365 "ERROR: FC host '%s' attempted to flush work, "
2366 "when no workqueue created.\n", shost->hostt->name);
2367 dump_stack();
2368 return;
2369 }
2370
2371 flush_workqueue(fc_host_work_q(shost));
2372}
2373
2374/**
2375 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2376 * @shost: Pointer to Scsi_Host bound to fc_host.
2377 * @work: Work to queue for execution.
2378 * @delay: jiffies to delay the work queuing
2379 *
2380 * Return value:
0f29b966 2381 * 1 on success / 0 already queued / < 0 for error
eb44820c 2382 */
aedf3497 2383static int
c4028958 2384fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
aedf3497
JS		 2385 unsigned long delay)
2386{
2387 if (unlikely(!fc_host_devloss_work_q(shost))) {
2388 printk(KERN_ERR
2389 "ERROR: FC host '%s' attempted to queue work, "
2390 "when no workqueue created.\n", shost->hostt->name);
2391 dump_stack();
2392
2393 return -EINVAL;
2394 }
2395
2396 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2397}
2398
2399/**
2400 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2401 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2402 */
aedf3497
JS		 2403static void
2404fc_flush_devloss(struct Scsi_Host *shost)
2405{
2406 if (!fc_host_devloss_work_q(shost)) {
2407 printk(KERN_ERR
2408 "ERROR: FC host '%s' attempted to flush work, "
2409 "when no workqueue created.\n", shost->hostt->name);
2410 dump_stack();
2411 return;
2412 }
2413
2414 flush_workqueue(fc_host_devloss_work_q(shost));
2415}
2416
1da177e4
LT		 2417
2418/**
eb44820c
RL		 2419 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2420 * @shost: Which &Scsi_Host
1da177e4 2421 *
25985edc 2422 * This routine is expected to be called immediately preceding the
1da177e4
LT		 2423 * a driver's call to scsi_remove_host().
2424 *
2425 * WARNING: A driver utilizing the fc_transport, which fails to call
eb44820c 2426 * this routine prior to scsi_remove_host(), will leave dangling
1da177e4
LT		 2427 * objects in /sys/class/fc_remote_ports. Access to any of these
2428 * objects can result in a system crash !!!
2429 *
2430 * Notes:
2431 * This routine assumes no locks are held on entry.
eb44820c 2432 */
1da177e4
LT		 2433void
2434fc_remove_host(struct Scsi_Host *shost)
2435{
a53eb5e0
JS		 2436 struct fc_vport *vport = NULL, *next_vport = NULL;
2437 struct fc_rport *rport = NULL, *next_rport = NULL;
aedf3497
JS		 2438 struct workqueue_struct *work_q;
2439 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
a53eb5e0 2440 unsigned long flags;
a53eb5e0
JS		 2441
2442 spin_lock_irqsave(shost->host_lock, flags);
2443
2444 /* Remove any vports */
9ef3e4a4
JS		 2445 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2446 fc_queue_work(shost, &vport->vport_delete_work);
1da177e4
LT		 2447
2448 /* Remove any remote ports */
2449 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2450 &fc_host->rports, peers) {
2451 list_del(&rport->peers);
2452 rport->port_state = FC_PORTSTATE_DELETED;
2453 fc_queue_work(shost, &rport->rport_delete_work);
2454 }
2455
1da177e4 2456 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2457 &fc_host->rport_bindings, peers) {
2458 list_del(&rport->peers);
2459 rport->port_state = FC_PORTSTATE_DELETED;
2460 fc_queue_work(shost, &rport->rport_delete_work);
2461 }
2462
a53eb5e0
JS		 2463 spin_unlock_irqrestore(shost->host_lock, flags);
2464
aedf3497
JS		 2465 /* flush all scan work items */
2466 scsi_flush_work(shost);
2467
2468 /* flush all stgt delete, and rport delete work items, then kill it */
2469 if (fc_host->work_q) {
2470 work_q = fc_host->work_q;
2471 fc_host->work_q = NULL;
2472 destroy_workqueue(work_q);
2473 }
2474
2475 /* flush all devloss work items, then kill it */
2476 if (fc_host->devloss_work_q) {
2477 work_q = fc_host->devloss_work_q;
2478 fc_host->devloss_work_q = NULL;
2479 destroy_workqueue(work_q);
2480 }
1da177e4
LT		 2481}
2482EXPORT_SYMBOL(fc_remove_host);
2483
fff9d40c
MC		 2484static void fc_terminate_rport_io(struct fc_rport *rport)
2485{
2486 struct Scsi_Host *shost = rport_to_shost(rport);
2487 struct fc_internal *i = to_fc_internal(shost->transportt);
2488
2489 /* Involve the LLDD if possible to terminate all io on the rport. */
2490 if (i->f->terminate_rport_io)
2491 i->f->terminate_rport_io(rport);
2492
2493 /*
5d9fb5cc 2494 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
fff9d40c 2495 */
5d9fb5cc 2496 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
fff9d40c 2497}
aedf3497
JS		 2498
2499/**
25985edc 2500 * fc_starget_delete - called to delete the scsi descendants of an rport
c4028958 2501 * @work: remote port to be operated on.
eb44820c
RL		 2502 *
2503 * Deletes target and all sdevs.
2504 */
19a7b4ae 2505static void
c4028958 2506fc_starget_delete(struct work_struct *work)
19a7b4ae 2507{
c4028958
DH		 2508 struct fc_rport *rport =
2509 container_of(work, struct fc_rport, stgt_delete_work);
19a7b4ae 2510
fff9d40c 2511 fc_terminate_rport_io(rport);
19a7b4ae
JSEC		 2512 scsi_remove_target(&rport->dev);
2513}
2514
aedf3497
JS		 2515
2516/**
2517 * fc_rport_final_delete - finish rport termination and delete it.
c4028958 2518 * @work: remote port to be deleted.
eb44820c 2519 */
aedf3497 2520static void
c4028958 2521fc_rport_final_delete(struct work_struct *work)
aedf3497 2522{
c4028958
DH		 2523 struct fc_rport *rport =
2524 container_of(work, struct fc_rport, rport_delete_work);
aedf3497
JS		 2525 struct device *dev = &rport->dev;
2526 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2527 struct fc_internal *i = to_fc_internal(shost->transportt);
92740b24 2528 unsigned long flags;
8798a694 2529 int do_callback = 0;
aedf3497 2530
112f661d
NNS		 2531 fc_terminate_rport_io(rport);
2532
aedf3497 2533 /*
9ef3e4a4 2534 * if a scan is pending, flush the SCSI Host work_q so that
aedf3497
JS		 2535 * that we can reclaim the rport scan work element.
2536 */
2537 if (rport->flags & FC_RPORT_SCAN_PENDING)
2538 scsi_flush_work(shost);
2539
92740b24
JS		 2540 /*
2541 * Cancel any outstanding timers. These should really exist
2542 * only when rmmod'ing the LLDD and we're asking for
2543 * immediate termination of the rports
2544 */
2545 spin_lock_irqsave(shost->host_lock, flags);
2546 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2547 spin_unlock_irqrestore(shost->host_lock, flags);
2548 if (!cancel_delayed_work(&rport->fail_io_work))
2549 fc_flush_devloss(shost);
2550 if (!cancel_delayed_work(&rport->dev_loss_work))
2551 fc_flush_devloss(shost);
2552 spin_lock_irqsave(shost->host_lock, flags);
2553 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2554 }
2555 spin_unlock_irqrestore(shost->host_lock, flags);
2556
0f29b966
JS		 2557 /* Delete SCSI target and sdevs */
2558 if (rport->scsi_target_id != -1)
c4028958 2559 fc_starget_delete(&rport->stgt_delete_work);
92740b24
JS		 2560
2561 /*
2562 * Notify the driver that the rport is now dead. The LLDD will
2563 * also guarantee that any communication to the rport is terminated
4be98c0c
JS		 2564 *
2565 * Avoid this call if we already called it when we preserved the
2566 * rport for the binding.
92740b24 2567 */
8798a694 2568 spin_lock_irqsave(shost->host_lock, flags);
4be98c0c 2569 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
8798a694
MR		 2570 (i->f->dev_loss_tmo_callbk)) {
2571 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2572 do_callback = 1;
2573 }
2574 spin_unlock_irqrestore(shost->host_lock, flags);
2575
2576 if (do_callback)
0f29b966 2577 i->f->dev_loss_tmo_callbk(rport);
0f29b966 2578
9e4f5e29
JS		 2579 fc_bsg_remove(rport->rqst_q);
2580
aedf3497
JS		 2581 transport_remove_device(dev);
2582 device_del(dev);
2583 transport_destroy_device(dev);
3bdad7bd
JS		 2584 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2585 put_device(dev); /* for self-reference */
aedf3497
JS		 2586}
2587
2588
1da177e4
LT		 2589/**
2590 * fc_rport_create - allocates and creates a remote FC port.
2591 * @shost: scsi host the remote port is connected to.
2592 * @channel: Channel on shost port connected to.
2593 * @ids: The world wide names, fc address, and FC4 port
2594 * roles for the remote port.
2595 *
2596 * Allocates and creates the remoter port structure, including the
2597 * class and sysfs creation.
2598 *
2599 * Notes:
2600 * This routine assumes no locks are held on entry.
eb44820c 2601 */
44818efb 2602static struct fc_rport *
1da177e4
LT		 2603fc_rport_create(struct Scsi_Host *shost, int channel,
2604 struct fc_rport_identifiers *ids)
2605{
aedf3497 2606 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2607 struct fc_internal *fci = to_fc_internal(shost->transportt);
2608 struct fc_rport *rport;
2609 struct device *dev;
2610 unsigned long flags;
2611 int error;
2612 size_t size;
2613
2614 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
24669f75 2615 rport = kzalloc(size, GFP_KERNEL);
1da177e4 2616 if (unlikely(!rport)) {
cadbd4a5 2617 printk(KERN_ERR "%s: allocation failure\n", __func__);
1da177e4
LT		 2618 return NULL;
2619 }
1da177e4
LT		 2620
2621 rport->maxframe_size = -1;
2622 rport->supported_classes = FC_COS_UNSPECIFIED;
43ca910a 2623 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
1da177e4
LT		 2624 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2625 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2626 rport->port_id = ids->port_id;
2627 rport->roles = ids->roles;
2628 rport->port_state = FC_PORTSTATE_ONLINE;
2629 if (fci->f->dd_fcrport_size)
2630 rport->dd_data = &rport[1];
2631 rport->channel = channel;
0f29b966 2632 rport->fast_io_fail_tmo = -1;
1da177e4 2633
c4028958
DH		 2634 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2635 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2636 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2637 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2638 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
1da177e4
LT		 2639
2640 spin_lock_irqsave(shost->host_lock, flags);
2641
2642 rport->number = fc_host->next_rport_number++;
a53eb5e0 2643 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
1da177e4
LT		 2644 rport->scsi_target_id = fc_host->next_target_id++;
2645 else
2646 rport->scsi_target_id = -1;
aedf3497 2647 list_add_tail(&rport->peers, &fc_host->rports);
3bdad7bd 2648 get_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 2649
2650 spin_unlock_irqrestore(shost->host_lock, flags);
2651
2652 dev = &rport->dev;
3bdad7bd
JS		 2653 device_initialize(dev); /* takes self reference */
2654 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
1da177e4 2655 dev->release = fc_rport_dev_release;
71610f55
KS		 2656 dev_set_name(dev, "rport-%d:%d-%d",
2657 shost->host_no, channel, rport->number);
1da177e4
LT		 2658 transport_setup_device(dev);
2659
2660 error = device_add(dev);
2661 if (error) {
2662 printk(KERN_ERR "FC Remote Port device_add failed\n");
2663 goto delete_rport;
2664 }
2665 transport_add_device(dev);
2666 transport_configure_device(dev);
2667
9e4f5e29
JS		 2668 fc_bsg_rportadd(shost, rport);
2669 /* ignore any bsg add error - we just can't do sgio */
2670
a53eb5e0 2671 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
1da177e4 2672 /* initiate a scan of the target */
aedf3497 2673 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2674 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2675 }
1da177e4
LT		 2676
2677 return rport;
2678
2679delete_rport:
2680 transport_destroy_device(dev);
1da177e4
LT		 2681 spin_lock_irqsave(shost->host_lock, flags);
2682 list_del(&rport->peers);
3bdad7bd 2683 put_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 2684 spin_unlock_irqrestore(shost->host_lock, flags);
2685 put_device(dev->parent);
2686 kfree(rport);
2687 return NULL;
2688}
2689
2690/**
eb44820c 2691 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
1da177e4
LT		 2692 * @shost: scsi host the remote port is connected to.
2693 * @channel: Channel on shost port connected to.
2694 * @ids: The world wide names, fc address, and FC4 port
2695 * roles for the remote port.
2696 *
2697 * The LLDD calls this routine to notify the transport of the existence
2698 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2699 * of the port, it's FC address (port_id), and the FC4 roles that are
2700 * active for the port.
2701 *
2702 * For ports that are FCP targets (aka scsi targets), the FC transport
2703 * maintains consistent target id bindings on behalf of the LLDD.
2704 * A consistent target id binding is an assignment of a target id to
2705 * a remote port identifier, which persists while the scsi host is
2706 * attached. The remote port can disappear, then later reappear, and
2707 * it's target id assignment remains the same. This allows for shifts
2708 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2709 * changes to the scsi subsystem which is based on scsi host number and
2710 * target id values. Bindings are only valid during the attachment of
2711 * the scsi host. If the host detaches, then later re-attaches, target
2712 * id bindings may change.
2713 *
2714 * This routine is responsible for returning a remote port structure.
2715 * The routine will search the list of remote ports it maintains
2716 * internally on behalf of consistent target id mappings. If found, the
2717 * remote port structure will be reused. Otherwise, a new remote port
2718 * structure will be allocated.
2719 *
2720 * Whenever a remote port is allocated, a new fc_remote_port class
2721 * device is created.
2722 *
2723 * Should not be called from interrupt context.
2724 *
2725 * Notes:
2726 * This routine assumes no locks are held on entry.
eb44820c 2727 */
1da177e4
LT		 2728struct fc_rport *
2729fc_remote_port_add(struct Scsi_Host *shost, int channel,
2730 struct fc_rport_identifiers *ids)
2731{
19a7b4ae 2732 struct fc_internal *fci = to_fc_internal(shost->transportt);
aedf3497 2733 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2734 struct fc_rport *rport;
2735 unsigned long flags;
2736 int match = 0;
2737
aedf3497
JS		 2738 /* ensure any stgt delete functions are done */
2739 fc_flush_work(shost);
2740
19a7b4ae
JSEC		 2741 /*
2742 * Search the list of "active" rports, for an rport that has been
2743 * deleted, but we've held off the real delete while the target
2744 * is in a "blocked" state.
2745 */
2746 spin_lock_irqsave(shost->host_lock, flags);
2747
aedf3497 2748 list_for_each_entry(rport, &fc_host->rports, peers) {
19a7b4ae
JSEC		 2749
2750 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2751 (rport->channel == channel)) {
2752
aedf3497 2753 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 2754 case FC_TGTID_BIND_BY_WWPN:
2755 case FC_TGTID_BIND_NONE:
2756 if (rport->port_name == ids->port_name)
2757 match = 1;
2758 break;
2759 case FC_TGTID_BIND_BY_WWNN:
2760 if (rport->node_name == ids->node_name)
2761 match = 1;
2762 break;
2763 case FC_TGTID_BIND_BY_ID:
2764 if (rport->port_id == ids->port_id)
2765 match = 1;
2766 break;
2767 }
2768
2769 if (match) {
19a7b4ae
JSEC		 2770
2771 memcpy(&rport->node_name, &ids->node_name,
2772 sizeof(rport->node_name));
2773 memcpy(&rport->port_name, &ids->port_name,
2774 sizeof(rport->port_name));
2775 rport->port_id = ids->port_id;
2776
2777 rport->port_state = FC_PORTSTATE_ONLINE;
2778 rport->roles = ids->roles;
2779
2780 spin_unlock_irqrestore(shost->host_lock, flags);
2781
2782 if (fci->f->dd_fcrport_size)
2783 memset(rport->dd_data, 0,
2784 fci->f->dd_fcrport_size);
2785
2786 /*
92740b24
JS		 2787 * If we were not a target, cancel the
2788 * io terminate and rport timers, and
2789 * we're done.
2790 *
2791 * If we were a target, but our new role
2792 * doesn't indicate a target, leave the
2793 * timers running expecting the role to
2794 * change as the target fully logs in. If
2795 * it doesn't, the target will be torn down.
2796 *
2797 * If we were a target, and our role shows
2798 * we're still a target, cancel the timers
2799 * and kick off a scan.
19a7b4ae 2800 */
19a7b4ae 2801
92740b24
JS		 2802 /* was a target, not in roles */
2803 if ((rport->scsi_target_id != -1) &&
a53eb5e0 2804 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
92740b24 2805 return rport;
19a7b4ae
JSEC		 2806
2807 /*
92740b24
JS		 2808 * Stop the fail io and dev_loss timers.
2809 * If they flush, the port_state will
2810 * be checked and will NOOP the function.
19a7b4ae 2811 */
0f29b966
JS		 2812 if (!cancel_delayed_work(&rport->fail_io_work))
2813 fc_flush_devloss(shost);
92740b24 2814 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2815 fc_flush_devloss(shost);
2816
2817 spin_lock_irqsave(shost->host_lock, flags);
2818
fff9d40c 2819 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
4be98c0c
JS		 2820 FC_RPORT_DEVLOSS_PENDING |
2821 FC_RPORT_DEVLOSS_CALLBK_DONE);
19a7b4ae 2822
8fb2ef89
MC		 2823 spin_unlock_irqrestore(shost->host_lock, flags);
2824
92740b24
JS		 2825 /* if target, initiate a scan */
2826 if (rport->scsi_target_id != -1) {
5d9fb5cc
MC		 2827 scsi_target_unblock(&rport->dev,
2828 SDEV_RUNNING);
8fb2ef89
MC		 2829 spin_lock_irqsave(shost->host_lock,
2830 flags);
92740b24
JS		 2831 rport->flags |= FC_RPORT_SCAN_PENDING;
2832 scsi_queue_work(shost,
2833 &rport->scan_work);
2834 spin_unlock_irqrestore(shost->host_lock,
2835 flags);
8fb2ef89 2836 }
a0785edf 2837
9e4f5e29
JS		 2838 fc_bsg_goose_queue(rport);
2839
19a7b4ae
JSEC		 2840 return rport;
2841 }
2842 }
2843 }
2844
92740b24
JS		 2845 /*
2846 * Search the bindings array
2847 * Note: if never a FCP target, you won't be on this list
2848 */
aedf3497 2849 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
1da177e4
LT		 2850
2851 /* search for a matching consistent binding */
2852
aedf3497 2853 list_for_each_entry(rport, &fc_host->rport_bindings,
1da177e4
LT		 2854 peers) {
2855 if (rport->channel != channel)
2856 continue;
2857
aedf3497 2858 switch (fc_host->tgtid_bind_type) {
1da177e4
LT		 2859 case FC_TGTID_BIND_BY_WWPN:
2860 if (rport->port_name == ids->port_name)
2861 match = 1;
2862 break;
2863 case FC_TGTID_BIND_BY_WWNN:
2864 if (rport->node_name == ids->node_name)
2865 match = 1;
2866 break;
2867 case FC_TGTID_BIND_BY_ID:
2868 if (rport->port_id == ids->port_id)
2869 match = 1;
2870 break;
2871 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2872 break;
2873 }
2874
2875 if (match) {
aedf3497 2876 list_move_tail(&rport->peers, &fc_host->rports);
1da177e4
LT		 2877 break;
2878 }
2879 }
2880
1da177e4
LT		 2881 if (match) {
2882 memcpy(&rport->node_name, &ids->node_name,
2883 sizeof(rport->node_name));
2884 memcpy(&rport->port_name, &ids->port_name,
2885 sizeof(rport->port_name));
2886 rport->port_id = ids->port_id;
2887 rport->roles = ids->roles;
2888 rport->port_state = FC_PORTSTATE_ONLINE;
fff9d40c 2889 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 2890
19a7b4ae
JSEC		 2891 if (fci->f->dd_fcrport_size)
2892 memset(rport->dd_data, 0,
2893 fci->f->dd_fcrport_size);
8fb2ef89
MC		 2894 spin_unlock_irqrestore(shost->host_lock, flags);
2895
2896 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
5d9fb5cc 2897 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
19a7b4ae 2898
1da177e4 2899 /* initiate a scan of the target */
8fb2ef89 2900 spin_lock_irqsave(shost->host_lock, flags);
aedf3497 2901 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2902 scsi_queue_work(shost, &rport->scan_work);
a0785edf 2903 spin_unlock_irqrestore(shost->host_lock, flags);
8fb2ef89 2904 }
1da177e4
LT		 2905 return rport;
2906 }
2907 }
2908
19a7b4ae
JSEC		 2909 spin_unlock_irqrestore(shost->host_lock, flags);
2910
1da177e4
LT		 2911 /* No consistent binding found - create new remote port entry */
2912 rport = fc_rport_create(shost, channel, ids);
2913
2914 return rport;
2915}
2916EXPORT_SYMBOL(fc_remote_port_add);
2917
1da177e4
LT		 2918
2919/**
eb44820c 2920 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
1da177e4
LT		 2921 * @rport: The remote port that no longer exists
2922 *
2923 * The LLDD calls this routine to notify the transport that a remote
2924 * port is no longer part of the topology. Note: Although a port
2925 * may no longer be part of the topology, it may persist in the remote
19a7b4ae 2926 * ports displayed by the fc_host. We do this under 2 conditions:
eb44820c 2927 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
19a7b4ae
JSEC		 2928 * This allows the port to temporarily disappear, then reappear without
2929 * disrupting the SCSI device tree attached to it. During the "blocked"
2930 * period the port will still exist.
eb44820c 2931 * 2) If the port was a scsi target and disappears for longer than we
19a7b4ae
JSEC		 2932 * expect, we'll delete the port and the tear down the SCSI device tree
2933 * attached to it. However, we want to semi-persist the target id assigned
2934 * to that port if it eventually does exist. The port structure will
2935 * remain (although with minimal information) so that the target id
2936 * bindings remails.
1da177e4
LT		 2937 *
2938 * If the remote port is not an FCP Target, it will be fully torn down
2939 * and deallocated, including the fc_remote_port class device.
2940 *
19a7b4ae
JSEC		 2941 * If the remote port is an FCP Target, the port will be placed in a
2942 * temporary blocked state. From the LLDD's perspective, the rport no
2943 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2944 * exists, but all sdevs on it are blocked from further I/O. The following
eb44820c
RL		 2945 * is then expected.
2946 *
19a7b4ae
JSEC		 2947 * If the remote port does not return (signaled by a LLDD call to
2948 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2949 * scsi target is removed - killing all outstanding i/o and removing the
2950 * scsi devices attached ot it. The port structure will be marked Not
2951 * Present and be partially cleared, leaving only enough information to
2952 * recognize the remote port relative to the scsi target id binding if
2953 * it later appears. The port will remain as long as there is a valid
2954 * binding (e.g. until the user changes the binding type or unloads the
2955 * scsi host with the binding).
1da177e4 2956 *
19a7b4ae
JSEC		 2957 * If the remote port returns within the dev_loss_tmo value (and matches
2958 * according to the target id binding type), the port structure will be
2959 * reused. If it is no longer a SCSI target, the target will be torn
2960 * down. If it continues to be a SCSI target, then the target will be
2961 * unblocked (allowing i/o to be resumed), and a scan will be activated
2962 * to ensure that all luns are detected.
2963 *
2964 * Called from normal process context only - cannot be called from interrupt.
1da177e4
LT		 2965 *
2966 * Notes:
2967 * This routine assumes no locks are held on entry.
eb44820c 2968 */
1da177e4
LT		 2969void
2970fc_remote_port_delete(struct fc_rport *rport)
2971{
aedf3497 2972 struct Scsi_Host *shost = rport_to_shost(rport);
36dd288f 2973 unsigned long timeout = rport->dev_loss_tmo;
aedf3497
JS		 2974 unsigned long flags;
2975
2976 /*
2977 * No need to flush the fc_host work_q's, as all adds are synchronous.
2978 *
2979 * We do need to reclaim the rport scan work element, so eventually
2980 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2981 * there's still a scan pending.
2982 */
2983
2984 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2985
92740b24 2986 if (rport->port_state != FC_PORTSTATE_ONLINE) {
aedf3497 2987 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2988 return;
2989 }
2990
92740b24
JS		 2991 /*
2992 * In the past, we if this was not an FCP-Target, we would
2993 * unconditionally just jump to deleting the rport.
2994 * However, rports can be used as node containers by the LLDD,
2995 * and its not appropriate to just terminate the rport at the
2996 * first sign of a loss in connectivity. The LLDD may want to
2997 * send ELS traffic to re-validate the login. If the rport is
2998 * immediately deleted, it makes it inappropriate for a node
2999 * container.
3000 * So... we now unconditionally wait dev_loss_tmo before
3001 * destroying an rport.
3002 */
3003
aedf3497
JS		 3004 rport->port_state = FC_PORTSTATE_BLOCKED;
3005
3006 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3007
3008 spin_unlock_irqrestore(shost->host_lock, flags);
3009
7525236d
FT		 3010 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
3011 shost->active_mode & MODE_TARGET)
3012 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
3013
19a7b4ae 3014 scsi_target_block(&rport->dev);
1da177e4 3015
0f29b966
JS		 3016 /* see if we need to kill io faster than waiting for device loss */
3017 if ((rport->fast_io_fail_tmo != -1) &&
fff9d40c 3018 (rport->fast_io_fail_tmo < timeout))
0f29b966
JS		 3019 fc_queue_devloss_work(shost, &rport->fail_io_work,
3020 rport->fast_io_fail_tmo * HZ);
3021
19a7b4ae 3022 /* cap the length the devices can be blocked until they are deleted */
aedf3497 3023 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
1da177e4
LT		 3024}
3025EXPORT_SYMBOL(fc_remote_port_delete);
3026
3027/**
eb44820c 3028 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
1da177e4 3029 * @rport: The remote port that changed.
eb44820c 3030 * @roles: New roles for this port.
1da177e4 3031 *
eb44820c
RL		 3032 * Description: The LLDD calls this routine to notify the transport that the
3033 * roles on a remote port may have changed. The largest effect of this is
1da177e4
LT		 3034 * if a port now becomes a FCP Target, it must be allocated a
3035 * scsi target id. If the port is no longer a FCP target, any
3036 * scsi target id value assigned to it will persist in case the
3037 * role changes back to include FCP Target. No changes in the scsi
3038 * midlayer will be invoked if the role changes (in the expectation
3039 * that the role will be resumed. If it doesn't normal error processing
3040 * will take place).
3041 *
3042 * Should not be called from interrupt context.
3043 *
3044 * Notes:
3045 * This routine assumes no locks are held on entry.
eb44820c 3046 */
1da177e4
LT		 3047void
3048fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3049{
3050 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 3051 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 3052 unsigned long flags;
3053 int create = 0;
7525236d 3054 int ret;
1da177e4 3055
1da177e4 3056 spin_lock_irqsave(shost->host_lock, flags);
a53eb5e0 3057 if (roles & FC_PORT_ROLE_FCP_TARGET) {
19a7b4ae
JSEC		 3058 if (rport->scsi_target_id == -1) {
3059 rport->scsi_target_id = fc_host->next_target_id++;
3060 create = 1;
a53eb5e0 3061 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
19a7b4ae 3062 create = 1;
7525236d
FT		 3063 } else if (shost->active_mode & MODE_TARGET) {
3064 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
3065 (char *)&rport->node_name);
3066 if (ret)
3067 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
3068 ret);
1da177e4 3069 }
1da177e4 3070
19a7b4ae
JSEC		 3071 rport->roles = roles;
3072
aedf3497
JS		 3073 spin_unlock_irqrestore(shost->host_lock, flags);
3074
19a7b4ae
JSEC		 3075 if (create) {
3076 /*
3077 * There may have been a delete timer running on the
3078 * port. Ensure that it is cancelled as we now know
3079 * the port is an FCP Target.
3080 * Note: we know the rport is exists and in an online
3081 * state as the LLDD would not have had an rport
3082 * reference to pass us.
3083 *
3084 * Take no action on the del_timer failure as the state
3085 * machine state change will validate the
3086 * transaction.
3087 */
0f29b966
JS		 3088 if (!cancel_delayed_work(&rport->fail_io_work))
3089 fc_flush_devloss(shost);
19a7b4ae 3090 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 3091 fc_flush_devloss(shost);
3092
3093 spin_lock_irqsave(shost->host_lock, flags);
fff9d40c 3094 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
0eecee41
JS		 3095 FC_RPORT_DEVLOSS_PENDING |
3096 FC_RPORT_DEVLOSS_CALLBK_DONE);
aedf3497
JS		 3097 spin_unlock_irqrestore(shost->host_lock, flags);
3098
3099 /* ensure any stgt delete functions are done */
3100 fc_flush_work(shost);
19a7b4ae 3101
5d9fb5cc 3102 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
1da177e4 3103 /* initiate a scan of the target */
aedf3497
JS		 3104 spin_lock_irqsave(shost->host_lock, flags);
3105 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 3106 scsi_queue_work(shost, &rport->scan_work);
aedf3497 3107 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae 3108 }
1da177e4
LT		 3109}
3110EXPORT_SYMBOL(fc_remote_port_rolechg);
3111
3112/**
eb44820c 3113 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
92740b24 3114 * @work: rport target that failed to reappear in the allotted time.
eb44820c
RL		 3115 *
3116 * Description: An attempt to delete a remote port blocks, and if it fails
3117 * to return in the allotted time this gets called.
3118 */
1da177e4 3119static void
c4028958 3120fc_timeout_deleted_rport(struct work_struct *work)
1da177e4 3121{
c4028958
DH		 3122 struct fc_rport *rport =
3123 container_of(work, struct fc_rport, dev_loss_work.work);
19a7b4ae 3124 struct Scsi_Host *shost = rport_to_shost(rport);
4be98c0c 3125 struct fc_internal *i = to_fc_internal(shost->transportt);
aedf3497 3126 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
19a7b4ae 3127 unsigned long flags;
8798a694 3128 int do_callback = 0;
1da177e4 3129
19a7b4ae 3130 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 3131
aedf3497
JS		 3132 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3133
1da177e4 3134 /*
92740b24
JS		 3135 * If the port is ONLINE, then it came back. If it was a SCSI
3136 * target, validate it still is. If not, tear down the
3137 * scsi_target on it.
1da177e4 3138 */
aedf3497 3139 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
92740b24 3140 (rport->scsi_target_id != -1) &&
a53eb5e0 3141 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
19a7b4ae 3142 dev_printk(KERN_ERR, &rport->dev,
aedf3497
JS		 3143 "blocked FC remote port time out: no longer"
3144 " a FCP target, removing starget\n");
aedf3497 3145 spin_unlock_irqrestore(shost->host_lock, flags);
5d9fb5cc 3146 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
a0785edf 3147 fc_queue_work(shost, &rport->stgt_delete_work);
19a7b4ae
JSEC		 3148 return;
3149 }
1da177e4 3150
92740b24 3151 /* NOOP state - we're flushing workq's */
19a7b4ae
JSEC		 3152 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3153 spin_unlock_irqrestore(shost->host_lock, flags);
3154 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3155 "blocked FC remote port time out: leaving"
3156 " rport%s alone\n",
3157 (rport->scsi_target_id != -1) ? " and starget" : "");
19a7b4ae
JSEC		 3158 return;
3159 }
1da177e4 3160
92740b24
JS		 3161 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3162 (rport->scsi_target_id == -1)) {
aedf3497
JS		 3163 list_del(&rport->peers);
3164 rport->port_state = FC_PORTSTATE_DELETED;
19a7b4ae 3165 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3166 "blocked FC remote port time out: removing"
3167 " rport%s\n",
3168 (rport->scsi_target_id != -1) ? " and starget" : "");
aedf3497
JS		 3169 fc_queue_work(shost, &rport->rport_delete_work);
3170 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC		 3171 return;
3172 }
1da177e4 3173
19a7b4ae
JSEC		 3174 dev_printk(KERN_ERR, &rport->dev,
3175 "blocked FC remote port time out: removing target and "
3176 "saving binding\n");
3177
aedf3497 3178 list_move_tail(&rport->peers, &fc_host->rport_bindings);
1da177e4
LT		 3179
3180 /*
19a7b4ae
JSEC		 3181 * Note: We do not remove or clear the hostdata area. This allows
3182 * host-specific target data to persist along with the
3183 * scsi_target_id. It's up to the host to manage it's hostdata area.
1da177e4 3184 */
1da177e4 3185
19a7b4ae
JSEC		 3186 /*
3187 * Reinitialize port attributes that may change if the port comes back.
3188 */
3189 rport->maxframe_size = -1;
3190 rport->supported_classes = FC_COS_UNSPECIFIED;
a53eb5e0 3191 rport->roles = FC_PORT_ROLE_UNKNOWN;
aedf3497 3192 rport->port_state = FC_PORTSTATE_NOTPRESENT;
fff9d40c 3193 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 3194
f78badb1
JS		 3195 /*
3196 * Pre-emptively kill I/O rather than waiting for the work queue
3197 * item to teardown the starget. (FCOE libFC folks prefer this
3198 * and to have the rport_port_id still set when it's done).
3199 */
3200 spin_unlock_irqrestore(shost->host_lock, flags);
3201 fc_terminate_rport_io(rport);
3202
8798a694
MR		 3203 spin_lock_irqsave(shost->host_lock, flags);
3204
3205 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
f78badb1 3206
8798a694
MR		 3207 /* remove the identifiers that aren't used in the consisting binding */
3208 switch (fc_host->tgtid_bind_type) {
3209 case FC_TGTID_BIND_BY_WWPN:
3210 rport->node_name = -1;
3211 rport->port_id = -1;
3212 break;
3213 case FC_TGTID_BIND_BY_WWNN:
3214 rport->port_name = -1;
3215 rport->port_id = -1;
3216 break;
3217 case FC_TGTID_BIND_BY_ID:
3218 rport->node_name = -1;
3219 rport->port_name = -1;
3220 break;
3221 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3222 break;
3223 }
3224
3225 /*
3226 * As this only occurs if the remote port (scsi target)
3227 * went away and didn't come back - we'll remove
3228 * all attached scsi devices.
3229 */
3230 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3231 fc_queue_work(shost, &rport->stgt_delete_work);
3232
3233 do_callback = 1;
19a7b4ae
JSEC		 3234 }
3235
8798a694 3236 spin_unlock_irqrestore(shost->host_lock, flags);
4be98c0c
JS		 3237
3238 /*
3239 * Notify the driver that the rport is now dead. The LLDD will
3240 * also guarantee that any communication to the rport is terminated
3241 *
3242 * Note: we set the CALLBK_DONE flag above to correspond
3243 */
8798a694 3244 if (do_callback && i->f->dev_loss_tmo_callbk)
4be98c0c 3245 i->f->dev_loss_tmo_callbk(rport);
1da177e4 3246}
1da177e4 3247
4be98c0c 3248
0f29b966 3249/**
eb44820c 3250 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
c4028958 3251 * @work: rport to terminate io on.
0f29b966
JS		 3252 *
3253 * Notes: Only requests the failure of the io, not that all are flushed
3254 * prior to returning.
eb44820c 3255 */
0f29b966 3256static void
c4028958 3257fc_timeout_fail_rport_io(struct work_struct *work)
0f29b966 3258{
c4028958
DH		 3259 struct fc_rport *rport =
3260 container_of(work, struct fc_rport, fail_io_work.work);
0f29b966
JS		 3261
3262 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3263 return;
3264
fff9d40c
MC		 3265 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3266 fc_terminate_rport_io(rport);
0f29b966
JS		 3267}
3268
1da177e4
LT		 3269/**
3270 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
c4028958 3271 * @work: remote port to be scanned.
eb44820c 3272 */
1da177e4 3273static void
c4028958 3274fc_scsi_scan_rport(struct work_struct *work)
1da177e4 3275{
c4028958
DH		 3276 struct fc_rport *rport =
3277 container_of(work, struct fc_rport, scan_work);
aedf3497 3278 struct Scsi_Host *shost = rport_to_shost(rport);
03f002f7 3279 struct fc_internal *i = to_fc_internal(shost->transportt);
42e33148
JSEC		 3280 unsigned long flags;
3281
aedf3497 3282 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
03f002f7
CS		 3283 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3284 !(i->f->disable_target_scan)) {
aedf3497
JS		 3285 scsi_scan_target(&rport->dev, rport->channel,
3286 rport->scsi_target_id, SCAN_WILD_CARD, 1);
42e33148 3287 }
aedf3497
JS		 3288
3289 spin_lock_irqsave(shost->host_lock, flags);
3290 rport->flags &= ~FC_RPORT_SCAN_PENDING;
42e33148
JSEC		 3291 spin_unlock_irqrestore(shost->host_lock, flags);
3292}
3293
65d430fa
CS		 3294/**
3295 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3296 * @cmnd: SCSI command that scsi_eh is trying to recover
3297 *
3298 * This routine can be called from a FC LLD scsi_eh callback. It
3299 * blocks the scsi_eh thread until the fc_rport leaves the
2f2eb587
CS		 3300 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3301 * necessary to avoid the scsi_eh failing recovery actions for blocked
3302 * rports which would lead to offlined SCSI devices.
3303 *
3304 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3305 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3306 * passed back to scsi_eh.
65d430fa 3307 */
2f2eb587 3308int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
65d430fa
CS		 3309{
3310 struct Scsi_Host *shost = cmnd->device->host;
3311 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3312 unsigned long flags;
3313
3314 spin_lock_irqsave(shost->host_lock, flags);
2f2eb587
CS		 3315 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3316 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
65d430fa
CS		 3317 spin_unlock_irqrestore(shost->host_lock, flags);
3318 msleep(1000);
3319 spin_lock_irqsave(shost->host_lock, flags);
3320 }
3321 spin_unlock_irqrestore(shost->host_lock, flags);
2f2eb587
CS		 3322
3323 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3324 return FAST_IO_FAIL;
3325
3326 return 0;
65d430fa
CS		 3327}
3328EXPORT_SYMBOL(fc_block_scsi_eh);
42e33148 3329
a53eb5e0 3330/**
a30c3f69 3331 * fc_vport_setup - allocates and creates a FC virtual port.
a53eb5e0
JS		 3332 * @shost: scsi host the virtual port is connected to.
3333 * @channel: Channel on shost port connected to.
3334 * @pdev: parent device for vport
3335 * @ids: The world wide names, FC4 port roles, etc for
3336 * the virtual port.
3337 * @ret_vport: The pointer to the created vport.
3338 *
3339 * Allocates and creates the vport structure, calls the parent host
3340 * to instantiate the vport, the completes w/ class and sysfs creation.
3341 *
3342 * Notes:
3343 * This routine assumes no locks are held on entry.
eb44820c 3344 */
a53eb5e0 3345static int
a30c3f69 3346fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
a53eb5e0
JS		 3347 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3348{
3349 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3350 struct fc_internal *fci = to_fc_internal(shost->transportt);
3351 struct fc_vport *vport;
3352 struct device *dev;
3353 unsigned long flags;
3354 size_t size;
3355 int error;
3356
3357 *ret_vport = NULL;
3358
3359 if ( ! fci->f->vport_create)
3360 return -ENOENT;
3361
3362 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3363 vport = kzalloc(size, GFP_KERNEL);
3364 if (unlikely(!vport)) {
cadbd4a5 3365 printk(KERN_ERR "%s: allocation failure\n", __func__);
a53eb5e0
JS		 3366 return -ENOMEM;
3367 }
3368
3369 vport->vport_state = FC_VPORT_UNKNOWN;
3370 vport->vport_last_state = FC_VPORT_UNKNOWN;
3371 vport->node_name = ids->node_name;
3372 vport->port_name = ids->port_name;
3373 vport->roles = ids->roles;
3374 vport->vport_type = ids->vport_type;
3375 if (fci->f->dd_fcvport_size)
3376 vport->dd_data = &vport[1];
3377 vport->shost = shost;
3378 vport->channel = channel;
3379 vport->flags = FC_VPORT_CREATING;
9ef3e4a4 3380 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
a53eb5e0
JS		 3381
3382 spin_lock_irqsave(shost->host_lock, flags);
3383
3384 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3385 spin_unlock_irqrestore(shost->host_lock, flags);
3386 kfree(vport);
3387 return -ENOSPC;
3388 }
3389 fc_host->npiv_vports_inuse++;
3390 vport->number = fc_host->next_vport_number++;
3391 list_add_tail(&vport->peers, &fc_host->vports);
3392 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3393
3394 spin_unlock_irqrestore(shost->host_lock, flags);
3395
3396 dev = &vport->dev;
3397 device_initialize(dev); /* takes self reference */
3398 dev->parent = get_device(pdev); /* takes parent reference */
3399 dev->release = fc_vport_dev_release;
71610f55
KS		 3400 dev_set_name(dev, "vport-%d:%d-%d",
3401 shost->host_no, channel, vport->number);
a53eb5e0
JS		 3402 transport_setup_device(dev);
3403
3404 error = device_add(dev);
3405 if (error) {
3406 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3407 goto delete_vport;
3408 }
3409 transport_add_device(dev);
3410 transport_configure_device(dev);
3411
3412 error = fci->f->vport_create(vport, ids->disable);
3413 if (error) {
3414 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3415 goto delete_vport_all;
3416 }
3417
3418 /*
3419 * if the parent isn't the physical adapter's Scsi_Host, ensure
3420 * the Scsi_Host at least contains ia symlink to the vport.
3421 */
3422 if (pdev != &shost->shost_gendev) {
3423 error = sysfs_create_link(&shost->shost_gendev.kobj,
71610f55 3424 &dev->kobj, dev_name(dev));
a53eb5e0
JS		 3425 if (error)
3426 printk(KERN_ERR
3427 "%s: Cannot create vport symlinks for "
3428 "%s, err=%d\n",
71610f55 3429 __func__, dev_name(dev), error);
a53eb5e0
JS		 3430 }
3431 spin_lock_irqsave(shost->host_lock, flags);
3432 vport->flags &= ~FC_VPORT_CREATING;
3433 spin_unlock_irqrestore(shost->host_lock, flags);
3434
3435 dev_printk(KERN_NOTICE, pdev,
71610f55 3436 "%s created via shost%d channel %d\n", dev_name(dev),
a53eb5e0
JS		 3437 shost->host_no, channel);
3438
3439 *ret_vport = vport;
3440
3441 return 0;
3442
3443delete_vport_all:
3444 transport_remove_device(dev);
3445 device_del(dev);
3446delete_vport:
3447 transport_destroy_device(dev);
3448 spin_lock_irqsave(shost->host_lock, flags);
3449 list_del(&vport->peers);
3450 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3451 fc_host->npiv_vports_inuse--;
3452 spin_unlock_irqrestore(shost->host_lock, flags);
3453 put_device(dev->parent);
3454 kfree(vport);
3455
3456 return error;
3457}
3458
a30c3f69
AV		 3459/**
3460 * fc_vport_create - Admin App or LLDD requests creation of a vport
3461 * @shost: scsi host the virtual port is connected to.
3462 * @channel: channel on shost port connected to.
3463 * @ids: The world wide names, FC4 port roles, etc for
3464 * the virtual port.
3465 *
3466 * Notes:
3467 * This routine assumes no locks are held on entry.
3468 */
3469struct fc_vport *
3470fc_vport_create(struct Scsi_Host *shost, int channel,
3471 struct fc_vport_identifiers *ids)
3472{
3473 int stat;
3474 struct fc_vport *vport;
3475
3476 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3477 ids, &vport);
3478 return stat ? NULL : vport;
3479}
3480EXPORT_SYMBOL(fc_vport_create);
a53eb5e0
JS		 3481
3482/**
3483 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3484 * @vport: fc_vport to be terminated
3485 *
3486 * Calls the LLDD vport_delete() function, then deallocates and removes
3487 * the vport from the shost and object tree.
3488 *
3489 * Notes:
3490 * This routine assumes no locks are held on entry.
eb44820c 3491 */
a53eb5e0
JS		 3492int
3493fc_vport_terminate(struct fc_vport *vport)
3494{
3495 struct Scsi_Host *shost = vport_to_shost(vport);
3496 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3497 struct fc_internal *i = to_fc_internal(shost->transportt);
3498 struct device *dev = &vport->dev;
3499 unsigned long flags;
3500 int stat;
3501
a53eb5e0
JS		 3502 if (i->f->vport_delete)
3503 stat = i->f->vport_delete(vport);
3504 else
3505 stat = -ENOENT;
3506
3507 spin_lock_irqsave(shost->host_lock, flags);
3508 vport->flags &= ~FC_VPORT_DELETING;
3509 if (!stat) {
3510 vport->flags |= FC_VPORT_DELETED;
3511 list_del(&vport->peers);
3512 fc_host->npiv_vports_inuse--;
3513 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3514 }
3515 spin_unlock_irqrestore(shost->host_lock, flags);
3516
3517 if (stat)
3518 return stat;
3519
3520 if (dev->parent != &shost->shost_gendev)
71610f55 3521 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
a53eb5e0
JS		 3522 transport_remove_device(dev);
3523 device_del(dev);
3524 transport_destroy_device(dev);
3525
3526 /*
3527 * Removing our self-reference should mean our
3528 * release function gets called, which will drop the remaining
3529 * parent reference and free the data structure.
3530 */
3531 put_device(dev); /* for self-reference */
3532
3533 return 0; /* SUCCESS */
3534}
3535EXPORT_SYMBOL(fc_vport_terminate);
3536
9ef3e4a4
JS		 3537/**
3538 * fc_vport_sched_delete - workq-based delete request for a vport
9ef3e4a4 3539 * @work: vport to be deleted.
eb44820c 3540 */
9ef3e4a4
JS		 3541static void
3542fc_vport_sched_delete(struct work_struct *work)
3543{
3544 struct fc_vport *vport =
3545 container_of(work, struct fc_vport, vport_delete_work);
3546 int stat;
3547
3548 stat = fc_vport_terminate(vport);
3549 if (stat)
3550 dev_printk(KERN_ERR, vport->dev.parent,
3551 "%s: %s could not be deleted created via "
cadbd4a5 3552 "shost%d channel %d - error %d\n", __func__,
71610f55 3553 dev_name(&vport->dev), vport->shost->host_no,
9ef3e4a4
JS		 3554 vport->channel, stat);
3555}
3556
a53eb5e0 3557
9e4f5e29
JS		 3558/*
3559 * BSG support
3560 */
3561
3562
3563/**
3564 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3565 * @job: fc_bsg_job that is to be torn down
3566 */
3567static void
3568fc_destroy_bsgjob(struct fc_bsg_job *job)
3569{
3570 unsigned long flags;
3571
3572 spin_lock_irqsave(&job->job_lock, flags);
3573 if (job->ref_cnt) {
3574 spin_unlock_irqrestore(&job->job_lock, flags);
3575 return;
3576 }
3577 spin_unlock_irqrestore(&job->job_lock, flags);
3578
3579 put_device(job->dev); /* release reference for the request */
3580
3581 kfree(job->request_payload.sg_list);
3582 kfree(job->reply_payload.sg_list);
3583 kfree(job);
3584}
3585
9e4f5e29
JS		 3586/**
3587 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3588 * completed
3589 * @job: fc_bsg_job that is complete
3590 */
3591static void
3592fc_bsg_jobdone(struct fc_bsg_job *job)
3593{
3594 struct request *req = job->req;
3595 struct request *rsp = req->next_rq;
9e4f5e29
JS		 3596 int err;
3597
9e4f5e29 3598 err = job->req->errors = job->reply->result;
b5c6f776 3599
9e4f5e29
JS		 3600 if (err < 0)
3601 /* we're only returning the result field in the reply */
3602 job->req->sense_len = sizeof(uint32_t);
3603 else
3604 job->req->sense_len = job->reply_len;
3605
3606 /* we assume all request payload was transferred, residual == 0 */
3607 req->resid_len = 0;
3608
3609 if (rsp) {
3610 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3611
3612 /* set reply (bidi) residual */
3613 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3614 rsp->resid_len);
3615 }
b5c6f776
GM		 3616 blk_complete_request(req);
3617}
3618
3619/**
3620 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
fe5d20c8 3621 * @rq: BSG request that holds the job to be destroyed
b5c6f776
GM		 3622 */
3623static void fc_bsg_softirq_done(struct request *rq)
3624{
3625 struct fc_bsg_job *job = rq->special;
3626 unsigned long flags;
9e4f5e29 3627
b5c6f776
GM		 3628 spin_lock_irqsave(&job->job_lock, flags);
3629 job->state_flags |= FC_RQST_STATE_DONE;
3630 job->ref_cnt--;
3631 spin_unlock_irqrestore(&job->job_lock, flags);
9e4f5e29 3632
b5c6f776 3633 blk_end_request_all(rq, rq->errors);
9e4f5e29
JS		 3634 fc_destroy_bsgjob(job);
3635}
3636
9e4f5e29
JS		 3637/**
3638 * fc_bsg_job_timeout - handler for when a bsg request timesout
3639 * @req: request that timed out
3640 */
3641static enum blk_eh_timer_return
3642fc_bsg_job_timeout(struct request *req)
3643{
3644 struct fc_bsg_job *job = (void *) req->special;
3645 struct Scsi_Host *shost = job->shost;
3646 struct fc_internal *i = to_fc_internal(shost->transportt);
3647 unsigned long flags;
3648 int err = 0, done = 0;
3649
3650 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3651 return BLK_EH_RESET_TIMER;
3652
3653 spin_lock_irqsave(&job->job_lock, flags);
3654 if (job->state_flags & FC_RQST_STATE_DONE)
3655 done = 1;
3656 else
3657 job->ref_cnt++;
3658 spin_unlock_irqrestore(&job->job_lock, flags);
3659
3660 if (!done && i->f->bsg_timeout) {
3661 /* call LLDD to abort the i/o as it has timed out */
3662 err = i->f->bsg_timeout(job);
b8f08645
SS		 3663 if (err == -EAGAIN) {
3664 job->ref_cnt--;
3665 return BLK_EH_RESET_TIMER;
3666 } else if (err)
9e4f5e29
JS		 3667 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3668 "abort failed with status %d\n", err);
3669 }
3670
9e4f5e29 3671 /* the blk_end_sync_io() doesn't check the error */
47e7e89e
GM		 3672 if (done)
3673 return BLK_EH_NOT_HANDLED;
3674 else
3675 return BLK_EH_HANDLED;
9e4f5e29
JS		 3676}
3677
9e4f5e29
JS		 3678static int
3679fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3680{
3681 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3682
3683 BUG_ON(!req->nr_phys_segments);
3684
3685 buf->sg_list = kzalloc(sz, GFP_KERNEL);
3686 if (!buf->sg_list)
3687 return -ENOMEM;
3688 sg_init_table(buf->sg_list, req->nr_phys_segments);
3689 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3690 buf->payload_len = blk_rq_bytes(req);
3691 return 0;
3692}
3693
3694
3695/**
3696 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3697 * bsg request
3698 * @shost: SCSI Host corresponding to the bsg object
3699 * @rport: (optional) FC Remote Port corresponding to the bsg object
3700 * @req: BSG request that needs a job structure
3701 */
3702static int
3703fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3704 struct request *req)
3705{
3706 struct fc_internal *i = to_fc_internal(shost->transportt);
3707 struct request *rsp = req->next_rq;
3708 struct fc_bsg_job *job;
3709 int ret;
3710
3711 BUG_ON(req->special);
3712
3713 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3714 GFP_KERNEL);
3715 if (!job)
3716 return -ENOMEM;
3717
3718 /*
3719 * Note: this is a bit silly.
3720 * The request gets formatted as a SGIO v4 ioctl request, which
3721 * then gets reformatted as a blk request, which then gets
3722 * reformatted as a fc bsg request. And on completion, we have
3723 * to wrap return results such that SGIO v4 thinks it was a scsi
3724 * status. I hope this was all worth it.
3725 */
3726
3727 req->special = job;
3728 job->shost = shost;
3729 job->rport = rport;
3730 job->req = req;
3731 if (i->f->dd_bsg_size)
3732 job->dd_data = (void *)&job[1];
3733 spin_lock_init(&job->job_lock);
3734 job->request = (struct fc_bsg_request *)req->cmd;
3735 job->request_len = req->cmd_len;
3736 job->reply = req->sense;
3737 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3738 * allocated */
3739 if (req->bio) {
3740 ret = fc_bsg_map_buffer(&job->request_payload, req);
3741 if (ret)
3742 goto failjob_rls_job;
3743 }
3744 if (rsp && rsp->bio) {
3745 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3746 if (ret)
3747 goto failjob_rls_rqst_payload;
3748 }
3749 job->job_done = fc_bsg_jobdone;
3750 if (rport)
3751 job->dev = &rport->dev;
3752 else
3753 job->dev = &shost->shost_gendev;
3754 get_device(job->dev); /* take a reference for the request */
3755
3756 job->ref_cnt = 1;
3757
3758 return 0;
3759
3760
3761failjob_rls_rqst_payload:
3762 kfree(job->request_payload.sg_list);
3763failjob_rls_job:
3764 kfree(job);
3765 return -ENOMEM;
3766}
3767
3768
3769enum fc_dispatch_result {
3770 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
3771 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
3772 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
3773};
3774
3775
3776/**
3777 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
5415907a 3778 * @q: fc host request queue
9e4f5e29
JS		 3779 * @shost: scsi host rport attached to
3780 * @job: bsg job to be processed
3781 */
3782static enum fc_dispatch_result
3783fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3784 struct fc_bsg_job *job)
3785{
3786 struct fc_internal *i = to_fc_internal(shost->transportt);
3787 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3788 int ret;
3789
3790 /* Validate the host command */
3791 switch (job->request->msgcode) {
3792 case FC_BSG_HST_ADD_RPORT:
3793 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3794 break;
3795
3796 case FC_BSG_HST_DEL_RPORT:
3797 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3798 break;
3799
3800 case FC_BSG_HST_ELS_NOLOGIN:
3801 cmdlen += sizeof(struct fc_bsg_host_els);
3802 /* there better be a xmt and rcv payloads */
3803 if ((!job->request_payload.payload_len) ||
3804 (!job->reply_payload.payload_len)) {
3805 ret = -EINVAL;
3806 goto fail_host_msg;
3807 }
3808 break;
3809
3810 case FC_BSG_HST_CT:
3811 cmdlen += sizeof(struct fc_bsg_host_ct);
3812 /* there better be xmt and rcv payloads */
3813 if ((!job->request_payload.payload_len) ||
3814 (!job->reply_payload.payload_len)) {
3815 ret = -EINVAL;
3816 goto fail_host_msg;
3817 }
3818 break;
3819
3820 case FC_BSG_HST_VENDOR:
3821 cmdlen += sizeof(struct fc_bsg_host_vendor);
3822 if ((shost->hostt->vendor_id == 0L) ||
3823 (job->request->rqst_data.h_vendor.vendor_id !=
3824 shost->hostt->vendor_id)) {
3825 ret = -ESRCH;
3826 goto fail_host_msg;
3827 }
3828 break;
3829
3830 default:
3831 ret = -EBADR;
3832 goto fail_host_msg;
3833 }
3834
3835 /* check if we really have all the request data needed */
3836 if (job->request_len < cmdlen) {
3837 ret = -ENOMSG;
3838 goto fail_host_msg;
3839 }
3840
3841 ret = i->f->bsg_request(job);
3842 if (!ret)
3843 return FC_DISPATCH_UNLOCKED;
3844
3845fail_host_msg:
3846 /* return the errno failure code as the only status */
3847 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3848 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS		 3849 job->reply->result = ret;
3850 job->reply_len = sizeof(uint32_t);
3851 fc_bsg_jobdone(job);
3852 return FC_DISPATCH_UNLOCKED;
3853}
3854
3855
3856/*
3857 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3858 * @rport: rport to be restarted
3859 */
3860static void
3861fc_bsg_goose_queue(struct fc_rport *rport)
3862{
9e4f5e29
JS		 3863 if (!rport->rqst_q)
3864 return;
3865
c21e6beb
JA		 3866 /*
3867 * This get/put dance makes no sense
3868 */
9e4f5e29 3869 get_device(&rport->dev);
c21e6beb 3870 blk_run_queue_async(rport->rqst_q);
9e4f5e29
JS		 3871 put_device(&rport->dev);
3872}
3873
9e4f5e29
JS		 3874/**
3875 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
5415907a 3876 * @q: rport request queue
9e4f5e29
JS		 3877 * @shost: scsi host rport attached to
3878 * @rport: rport request destined to
3879 * @job: bsg job to be processed
3880 */
3881static enum fc_dispatch_result
3882fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3883 struct fc_rport *rport, struct fc_bsg_job *job)
3884{
3885 struct fc_internal *i = to_fc_internal(shost->transportt);
3886 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3887 int ret;
3888
3889 /* Validate the rport command */
3890 switch (job->request->msgcode) {
3891 case FC_BSG_RPT_ELS:
3892 cmdlen += sizeof(struct fc_bsg_rport_els);
3893 goto check_bidi;
3894
3895 case FC_BSG_RPT_CT:
3896 cmdlen += sizeof(struct fc_bsg_rport_ct);
3897check_bidi:
3898 /* there better be xmt and rcv payloads */
3899 if ((!job->request_payload.payload_len) ||
3900 (!job->reply_payload.payload_len)) {
3901 ret = -EINVAL;
3902 goto fail_rport_msg;
3903 }
3904 break;
3905 default:
3906 ret = -EBADR;
3907 goto fail_rport_msg;
3908 }
3909
3910 /* check if we really have all the request data needed */
3911 if (job->request_len < cmdlen) {
3912 ret = -ENOMSG;
3913 goto fail_rport_msg;
3914 }
3915
3916 ret = i->f->bsg_request(job);
3917 if (!ret)
3918 return FC_DISPATCH_UNLOCKED;
3919
3920fail_rport_msg:
3921 /* return the errno failure code as the only status */
3922 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3923 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS		 3924 job->reply->result = ret;
3925 job->reply_len = sizeof(uint32_t);
3926 fc_bsg_jobdone(job);
3927 return FC_DISPATCH_UNLOCKED;
3928}
3929
3930
3931/**
3932 * fc_bsg_request_handler - generic handler for bsg requests
3933 * @q: request queue to manage
3934 * @shost: Scsi_Host related to the bsg object
3935 * @rport: FC remote port related to the bsg object (optional)
3936 * @dev: device structure for bsg object
3937 */
3938static void
3939fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3940 struct fc_rport *rport, struct device *dev)
3941{
3942 struct request *req;
3943 struct fc_bsg_job *job;
3944 enum fc_dispatch_result ret;
3945
3946 if (!get_device(dev))
3947 return;
3948
7eaceacc 3949 while (1) {
2bc1c59d
MC		 3950 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3951 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3952 break;
9e4f5e29
JS		 3953
3954 req = blk_fetch_request(q);
3955 if (!req)
3956 break;
3957
3958 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3959 req->errors = -ENXIO;
3960 spin_unlock_irq(q->queue_lock);
d88a714b 3961 blk_end_request_all(req, -ENXIO);
9e4f5e29
JS		 3962 spin_lock_irq(q->queue_lock);
3963 continue;
3964 }
3965
3966 spin_unlock_irq(q->queue_lock);
3967
3968 ret = fc_req_to_bsgjob(shost, rport, req);
3969 if (ret) {
3970 req->errors = ret;
d88a714b 3971 blk_end_request_all(req, ret);
9e4f5e29
JS		 3972 spin_lock_irq(q->queue_lock);
3973 continue;
3974 }
3975
3976 job = req->special;
3977
3978 /* check if we have the msgcode value at least */
3979 if (job->request_len < sizeof(uint32_t)) {
3980 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3981 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS		 3982 job->reply->result = -ENOMSG;
3983 job->reply_len = sizeof(uint32_t);
3984 fc_bsg_jobdone(job);
3985 spin_lock_irq(q->queue_lock);
3986 continue;
3987 }
3988
3989 /* the dispatch routines will unlock the queue_lock */
3990 if (rport)
3991 ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3992 else
3993 ret = fc_bsg_host_dispatch(q, shost, job);
3994
3995 /* did dispatcher hit state that can't process any more */
3996 if (ret == FC_DISPATCH_BREAK)
3997 break;
3998
3999 /* did dispatcher had released the lock */
4000 if (ret == FC_DISPATCH_UNLOCKED)
4001 spin_lock_irq(q->queue_lock);
4002 }
4003
4004 spin_unlock_irq(q->queue_lock);
4005 put_device(dev);
4006 spin_lock_irq(q->queue_lock);
4007}
4008
4009
4010/**
4011 * fc_bsg_host_handler - handler for bsg requests for a fc host
4012 * @q: fc host request queue
4013 */
4014static void
4015fc_bsg_host_handler(struct request_queue *q)
4016{
4017 struct Scsi_Host *shost = q->queuedata;
4018
4019 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
4020}
4021
4022
4023/**
4024 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
4025 * @q: rport request queue
4026 */
4027static void
4028fc_bsg_rport_handler(struct request_queue *q)
4029{
4030 struct fc_rport *rport = q->queuedata;
4031 struct Scsi_Host *shost = rport_to_shost(rport);
4032
4033 fc_bsg_request_handler(q, shost, rport, &rport->dev);
4034}
4035
4036
4037/**
4038 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4039 * @shost: shost for fc_host
4040 * @fc_host: fc_host adding the structures to
4041 */
4042static int
4043fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4044{
4045 struct device *dev = &shost->shost_gendev;
4046 struct fc_internal *i = to_fc_internal(shost->transportt);
4047 struct request_queue *q;
4048 int err;
3c559ea8 4049 char bsg_name[20];
9e4f5e29
JS		 4050
4051 fc_host->rqst_q = NULL;
4052
4053 if (!i->f->bsg_request)
4054 return -ENOTSUPP;
4055
4056 snprintf(bsg_name, sizeof(bsg_name),
4057 "fc_host%d", shost->host_no);
4058
4059 q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4060 if (!q) {
4061 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4062 "initialize - no request queue\n",
4063 shost->host_no);
4064 return -ENOMEM;
4065 }
4066
4067 q->queuedata = shost;
4068 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
b5c6f776 4069 blk_queue_softirq_done(q, fc_bsg_softirq_done);
9e4f5e29
JS		 4070 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4071 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4072
4073 err = bsg_register_queue(q, dev, bsg_name, NULL);
4074 if (err) {
4075 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4076 "initialize - register queue\n",
4077 shost->host_no);
4078 blk_cleanup_queue(q);
4079 return err;
4080 }
4081
4082 fc_host->rqst_q = q;
4083 return 0;
4084}
4085
4086
4087/**
4088 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4089 * @shost: shost that rport is attached to
4090 * @rport: rport that the bsg hooks are being attached to
4091 */
4092static int
4093fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4094{
4095 struct device *dev = &rport->dev;
4096 struct fc_internal *i = to_fc_internal(shost->transportt);
4097 struct request_queue *q;
4098 int err;
4099
4100 rport->rqst_q = NULL;
4101
4102 if (!i->f->bsg_request)
4103 return -ENOTSUPP;
4104
4105 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4106 if (!q) {
4107 printk(KERN_ERR "%s: bsg interface failed to "
4108 "initialize - no request queue\n",
4109 dev->kobj.name);
4110 return -ENOMEM;
4111 }
4112
4113 q->queuedata = rport;
4114 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
b5c6f776 4115 blk_queue_softirq_done(q, fc_bsg_softirq_done);
9e4f5e29
JS		 4116 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4117 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4118
4119 err = bsg_register_queue(q, dev, NULL, NULL);
4120 if (err) {
4121 printk(KERN_ERR "%s: bsg interface failed to "
4122 "initialize - register queue\n",
4123 dev->kobj.name);
4124 blk_cleanup_queue(q);
4125 return err;
4126 }
4127
4128 rport->rqst_q = q;
4129 return 0;
4130}
4131
4132
4133/**
4134 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4135 * @q: the request_queue that is to be torn down.
78d16341
JS		 4136 *
4137 * Notes:
4138 * Before unregistering the queue empty any requests that are blocked
4139 *
4140 *
9e4f5e29
JS		 4141 */
4142static void
4143fc_bsg_remove(struct request_queue *q)
4144{
4145 if (q) {
4146 bsg_unregister_queue(q);
4147 blk_cleanup_queue(q);
4148 }
4149}
4150
4151
9ef3e4a4
JS		 4152/* Original Author: Martin Hicks */
4153MODULE_AUTHOR("James Smart");
1da177e4
LT		 4154MODULE_DESCRIPTION("FC Transport Attributes");
4155MODULE_LICENSE("GPL");
4156
4157module_init(fc_transport_init);
4158module_exit(fc_transport_exit);
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