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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
[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 <linux/netlink.h>
39#include <net/netlink.h>
40#include <scsi/scsi_netlink_fc.h>
9e4f5e29 41#include <scsi/scsi_bsg_fc.h>
1da177e4 42#include "scsi_priv.h"
7525236d 43#include "scsi_transport_fc_internal.h"
1da177e4 44
aedf3497 45static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
9ef3e4a4 46static void fc_vport_sched_delete(struct work_struct *work);
a30c3f69 47static int fc_vport_setup(struct Scsi_Host *shost, int channel,
a53eb5e0
JS		 48 struct device *pdev, struct fc_vport_identifiers *ids,
49 struct fc_vport **vport);
9e4f5e29
JS		 50static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
51static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
52static void fc_bsg_remove(struct request_queue *);
53static void fc_bsg_goose_queue(struct fc_rport *);
a53eb5e0 54
43ca910a
MC		 55/*
56 * Module Parameters
57 */
58
59/*
60 * dev_loss_tmo: the default number of seconds that the FC transport
61 * should insulate the loss of a remote port.
62 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
63 */
64static unsigned int fc_dev_loss_tmo = 60; /* seconds */
65
66module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
67MODULE_PARM_DESC(dev_loss_tmo,
68 "Maximum number of seconds that the FC transport should"
69 " insulate the loss of a remote port. Once this value is"
70 " exceeded, the scsi target is removed. Value should be"
71 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
72 " fast_io_fail_tmo is not set.");
73
1da177e4
LT		 74/*
75 * Redefine so that we can have same named attributes in the
76 * sdev/starget/host objects.
77 */
ee959b00
TJ		 78#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
79struct device_attribute device_attr_##_prefix##_##_name = \
1da177e4
LT		 80 __ATTR(_name,_mode,_show,_store)
81
82#define fc_enum_name_search(title, table_type, table) \
83static const char *get_fc_##title##_name(enum table_type table_key) \
84{ \
85 int i; \
86 char *name = NULL; \
87 \
6391a113 88 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 89 if (table[i].value == table_key) { \
90 name = table[i].name; \
91 break; \
92 } \
93 } \
94 return name; \
95}
96
97#define fc_enum_name_match(title, table_type, table) \
98static int get_fc_##title##_match(const char *table_key, \
99 enum table_type *value) \
100{ \
101 int i; \
102 \
6391a113 103 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 104 if (strncmp(table_key, table[i].name, \
105 table[i].matchlen) == 0) { \
106 *value = table[i].value; \
107 return 0; /* success */ \
108 } \
109 } \
110 return 1; /* failure */ \
111}
112
113
114/* Convert fc_port_type values to ascii string name */
115static struct {
116 enum fc_port_type value;
117 char *name;
118} fc_port_type_names[] = {
119 { FC_PORTTYPE_UNKNOWN, "Unknown" },
120 { FC_PORTTYPE_OTHER, "Other" },
121 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
122 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
123 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
124 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
951948a3 125 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
a53eb5e0 126 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
1da177e4
LT		 127};
128fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
129#define FC_PORTTYPE_MAX_NAMELEN 50
130
a53eb5e0
JS		 131/* Reuse fc_port_type enum function for vport_type */
132#define get_fc_vport_type_name get_fc_port_type_name
133
1da177e4 134
84314fd4
JS		 135/* Convert fc_host_event_code values to ascii string name */
136static const struct {
137 enum fc_host_event_code value;
138 char *name;
139} fc_host_event_code_names[] = {
140 { FCH_EVT_LIP, "lip" },
141 { FCH_EVT_LINKUP, "link_up" },
142 { FCH_EVT_LINKDOWN, "link_down" },
143 { FCH_EVT_LIPRESET, "lip_reset" },
144 { FCH_EVT_RSCN, "rscn" },
145 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
146 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
147 { FCH_EVT_PORT_ONLINE, "port_online" },
148 { FCH_EVT_PORT_OFFLINE, "port_offline" },
149 { FCH_EVT_PORT_FABRIC, "port_fabric" },
150 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
151 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
152};
153fc_enum_name_search(host_event_code, fc_host_event_code,
154 fc_host_event_code_names)
155#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
156
157
1da177e4
LT		 158/* Convert fc_port_state values to ascii string name */
159static struct {
160 enum fc_port_state value;
161 char *name;
162} fc_port_state_names[] = {
163 { FC_PORTSTATE_UNKNOWN, "Unknown" },
164 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
165 { FC_PORTSTATE_ONLINE, "Online" },
166 { FC_PORTSTATE_OFFLINE, "Offline" },
167 { FC_PORTSTATE_BLOCKED, "Blocked" },
168 { FC_PORTSTATE_BYPASSED, "Bypassed" },
169 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
170 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
171 { FC_PORTSTATE_ERROR, "Error" },
172 { FC_PORTSTATE_LOOPBACK, "Loopback" },
42e33148 173 { FC_PORTSTATE_DELETED, "Deleted" },
1da177e4
LT		 174};
175fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
176#define FC_PORTSTATE_MAX_NAMELEN 20
177
178
a53eb5e0
JS		 179/* Convert fc_vport_state values to ascii string name */
180static struct {
181 enum fc_vport_state value;
182 char *name;
183} fc_vport_state_names[] = {
184 { FC_VPORT_UNKNOWN, "Unknown" },
185 { FC_VPORT_ACTIVE, "Active" },
186 { FC_VPORT_DISABLED, "Disabled" },
187 { FC_VPORT_LINKDOWN, "Linkdown" },
188 { FC_VPORT_INITIALIZING, "Initializing" },
189 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
190 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
191 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
192 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
193 { FC_VPORT_FAILED, "VPort Failed" },
194};
195fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
196#define FC_VPORTSTATE_MAX_NAMELEN 24
197
198/* Reuse fc_vport_state enum function for vport_last_state */
199#define get_fc_vport_last_state_name get_fc_vport_state_name
200
201
1da177e4 202/* Convert fc_tgtid_binding_type values to ascii string name */
0ad78200 203static const struct {
1da177e4
LT		 204 enum fc_tgtid_binding_type value;
205 char *name;
206 int matchlen;
207} fc_tgtid_binding_type_names[] = {
208 { FC_TGTID_BIND_NONE, "none", 4 },
209 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
210 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
211 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
212};
213fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
214 fc_tgtid_binding_type_names)
215fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
216 fc_tgtid_binding_type_names)
217#define FC_BINDTYPE_MAX_NAMELEN 30
218
219
220#define fc_bitfield_name_search(title, table) \
221static ssize_t \
222get_fc_##title##_names(u32 table_key, char *buf) \
223{ \
224 char *prefix = ""; \
225 ssize_t len = 0; \
226 int i; \
227 \
6391a113 228 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 229 if (table[i].value & table_key) { \
230 len += sprintf(buf + len, "%s%s", \
231 prefix, table[i].name); \
232 prefix = ", "; \
233 } \
234 } \
235 len += sprintf(buf + len, "\n"); \
236 return len; \
237}
238
239
240/* Convert FC_COS bit values to ascii string name */
0ad78200 241static const struct {
1da177e4
LT		 242 u32 value;
243 char *name;
244} fc_cos_names[] = {
245 { FC_COS_CLASS1, "Class 1" },
246 { FC_COS_CLASS2, "Class 2" },
247 { FC_COS_CLASS3, "Class 3" },
248 { FC_COS_CLASS4, "Class 4" },
249 { FC_COS_CLASS6, "Class 6" },
250};
251fc_bitfield_name_search(cos, fc_cos_names)
252
253
254/* Convert FC_PORTSPEED bit values to ascii string name */
0ad78200 255static const struct {
1da177e4
LT		 256 u32 value;
257 char *name;
258} fc_port_speed_names[] = {
259 { FC_PORTSPEED_1GBIT, "1 Gbit" },
260 { FC_PORTSPEED_2GBIT, "2 Gbit" },
261 { FC_PORTSPEED_4GBIT, "4 Gbit" },
262 { FC_PORTSPEED_10GBIT, "10 Gbit" },
c3d2350a
JS		 263 { FC_PORTSPEED_8GBIT, "8 Gbit" },
264 { FC_PORTSPEED_16GBIT, "16 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);
112f661d 439 fc_host->work_q = alloc_workqueue(fc_host->work_q_name, 0, 0);
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);
112f661d
NNS		 447 fc_host->devloss_work_q =
448 alloc_workqueue(fc_host->devloss_work_q_name, 0, 0);
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;
537 u32 len, skblen;
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));
546 skblen = NLMSG_SPACE(len);
547
548 skb = alloc_skb(skblen, GFP_KERNEL);
549 if (!skb) {
550 err = -ENOBUFS;
551 goto send_fail;
552 }
553
554 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
555 skblen - sizeof(*nlh), 0);
556 if (!nlh) {
557 err = -ENOBUFS;
558 goto send_fail_skb;
559 }
560 event = NLMSG_DATA(nlh);
561
562 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
563 FC_NL_ASYNC_EVENT, len);
564 event->seconds = get_seconds();
565 event->vendor_id = 0;
566 event->host_no = shost->host_no;
567 event->event_datalen = sizeof(u32); /* bytes */
568 event->event_num = event_number;
569 event->event_code = event_code;
570 event->event_data = event_data;
571
ff491a73
PNA		 572 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
573 GFP_KERNEL);
84314fd4
JS		 574 return;
575
576send_fail_skb:
577 kfree_skb(skb);
578send_fail:
579 name = get_fc_host_event_code_name(event_code);
580 printk(KERN_WARNING
581 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
cadbd4a5 582 __func__, shost->host_no,
84314fd4
JS		 583 (name) ? name : "<unknown>", event_data, err);
584 return;
585}
586EXPORT_SYMBOL(fc_host_post_event);
587
588
589/**
eb44820c 590 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
84314fd4
JS		 591 * @shost: host the event occurred on
592 * @event_number: fc event number obtained from get_fc_event_number()
593 * @data_len: amount, in bytes, of vendor unique data
594 * @data_buf: pointer to vendor unique data
eb44820c 595 * @vendor_id: Vendor id
84314fd4
JS		 596 *
597 * Notes:
598 * This routine assumes no locks are held on entry.
eb44820c 599 */
84314fd4
JS		 600void
601fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
f14e2e29 602 u32 data_len, char * data_buf, u64 vendor_id)
84314fd4
JS		 603{
604 struct sk_buff *skb;
605 struct nlmsghdr *nlh;
606 struct fc_nl_event *event;
607 u32 len, skblen;
608 int err;
609
610 if (!scsi_nl_sock) {
611 err = -ENOENT;
612 goto send_vendor_fail;
613 }
614
615 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
616 skblen = NLMSG_SPACE(len);
617
618 skb = alloc_skb(skblen, GFP_KERNEL);
619 if (!skb) {
620 err = -ENOBUFS;
621 goto send_vendor_fail;
622 }
623
624 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
625 skblen - sizeof(*nlh), 0);
626 if (!nlh) {
627 err = -ENOBUFS;
628 goto send_vendor_fail_skb;
629 }
630 event = NLMSG_DATA(nlh);
631
632 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
633 FC_NL_ASYNC_EVENT, len);
634 event->seconds = get_seconds();
635 event->vendor_id = vendor_id;
636 event->host_no = shost->host_no;
637 event->event_datalen = data_len; /* bytes */
638 event->event_num = event_number;
639 event->event_code = FCH_EVT_VENDOR_UNIQUE;
640 memcpy(&event->event_data, data_buf, data_len);
641
ff491a73
PNA		 642 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
643 GFP_KERNEL);
84314fd4
JS		 644 return;
645
646send_vendor_fail_skb:
647 kfree_skb(skb);
648send_vendor_fail:
649 printk(KERN_WARNING
650 "%s: Dropped Event : host %d vendor_unique - err %d\n",
cadbd4a5 651 __func__, shost->host_no, err);
84314fd4
JS		 652 return;
653}
654EXPORT_SYMBOL(fc_host_post_vendor_event);
655
656
1da177e4
LT		 657
658static __init int fc_transport_init(void)
659{
84314fd4
JS		 660 int error;
661
662 atomic_set(&fc_event_seq, 0);
663
664 error = transport_class_register(&fc_host_class);
a53eb5e0
JS		 665 if (error)
666 return error;
667 error = transport_class_register(&fc_vport_class);
1da177e4 668 if (error)
48de68a4 669 goto unreg_host_class;
1da177e4
LT		 670 error = transport_class_register(&fc_rport_class);
671 if (error)
48de68a4
MC		 672 goto unreg_vport_class;
673 error = transport_class_register(&fc_transport_class);
674 if (error)
675 goto unreg_rport_class;
676 return 0;
677
678unreg_rport_class:
679 transport_class_unregister(&fc_rport_class);
680unreg_vport_class:
681 transport_class_unregister(&fc_vport_class);
682unreg_host_class:
683 transport_class_unregister(&fc_host_class);
684 return error;
1da177e4
LT		 685}
686
687static void __exit fc_transport_exit(void)
688{
689 transport_class_unregister(&fc_transport_class);
690 transport_class_unregister(&fc_rport_class);
691 transport_class_unregister(&fc_host_class);
a53eb5e0 692 transport_class_unregister(&fc_vport_class);
1da177e4
LT		 693}
694
695/*
696 * FC Remote Port Attribute Management
697 */
698
699#define fc_rport_show_function(field, format_string, sz, cast) \
700static ssize_t \
ee959b00
TJ		 701show_fc_rport_##field (struct device *dev, \
702 struct device_attribute *attr, char *buf) \
1da177e4 703{ \
ee959b00 704 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 705 struct Scsi_Host *shost = rport_to_shost(rport); \
706 struct fc_internal *i = to_fc_internal(shost->transportt); \
19a7b4ae
JSEC		 707 if ((i->f->get_rport_##field) && \
708 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 709 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae 710 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
1da177e4
LT		 711 i->f->get_rport_##field(rport); \
712 return snprintf(buf, sz, format_string, cast rport->field); \
713}
714
715#define fc_rport_store_function(field) \
716static ssize_t \
ee959b00
TJ		 717store_fc_rport_##field(struct device *dev, \
718 struct device_attribute *attr, \
719 const char *buf, size_t count) \
1da177e4
LT		 720{ \
721 int val; \
ee959b00 722 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 723 struct Scsi_Host *shost = rport_to_shost(rport); \
724 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 725 char *cp; \
19a7b4ae 726 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 727 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae
JSEC		 728 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
729 return -EBUSY; \
0f29b966
JS		 730 val = simple_strtoul(buf, &cp, 0); \
731 if (*cp && (*cp != '\n')) \
732 return -EINVAL; \
1da177e4
LT		 733 i->f->set_rport_##field(rport, val); \
734 return count; \
735}
736
737#define fc_rport_rd_attr(field, format_string, sz) \
738 fc_rport_show_function(field, format_string, sz, ) \
ee959b00 739static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 740 show_fc_rport_##field, NULL)
741
742#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
743 fc_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 744static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 745 show_fc_rport_##field, NULL)
746
747#define fc_rport_rw_attr(field, format_string, sz) \
748 fc_rport_show_function(field, format_string, sz, ) \
749 fc_rport_store_function(field) \
ee959b00 750static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 751 show_fc_rport_##field, \
752 store_fc_rport_##field)
753
754
755#define fc_private_rport_show_function(field, format_string, sz, cast) \
756static ssize_t \
ee959b00
TJ		 757show_fc_rport_##field (struct device *dev, \
758 struct device_attribute *attr, char *buf) \
1da177e4 759{ \
ee959b00 760 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 761 return snprintf(buf, sz, format_string, cast rport->field); \
762}
763
764#define fc_private_rport_rd_attr(field, format_string, sz) \
765 fc_private_rport_show_function(field, format_string, sz, ) \
ee959b00 766static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 767 show_fc_rport_##field, NULL)
768
769#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
770 fc_private_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 771static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 772 show_fc_rport_##field, NULL)
773
774
775#define fc_private_rport_rd_enum_attr(title, maxlen) \
776static ssize_t \
ee959b00
TJ		 777show_fc_rport_##title (struct device *dev, \
778 struct device_attribute *attr, char *buf) \
1da177e4 779{ \
ee959b00 780 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 781 const char *name; \
782 name = get_fc_##title##_name(rport->title); \
783 if (!name) \
784 return -EINVAL; \
785 return snprintf(buf, maxlen, "%s\n", name); \
786} \
ee959b00 787static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1da177e4
LT		 788 show_fc_rport_##title, NULL)
789
790
791#define SETUP_RPORT_ATTRIBUTE_RD(field) \
ee959b00 792 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 793 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
794 i->private_rport_attrs[count].store = NULL; \
795 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
796 if (i->f->show_rport_##field) \
797 count++
798
799#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
ee959b00 800 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 801 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
802 i->private_rport_attrs[count].store = NULL; \
803 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
804 count++
805
806#define SETUP_RPORT_ATTRIBUTE_RW(field) \
ee959b00 807 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 808 if (!i->f->set_rport_##field) { \
809 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
810 i->private_rport_attrs[count].store = NULL; \
811 } \
812 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
813 if (i->f->show_rport_##field) \
814 count++
815
0f29b966
JS		 816#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
817{ \
ee959b00 818 i->private_rport_attrs[count] = device_attr_rport_##field; \
0f29b966
JS		 819 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
820 count++; \
821}
822
1da177e4
LT		 823
824/* The FC Transport Remote Port Attributes: */
825
826/* Fixed Remote Port Attributes */
827
828fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
829
830static ssize_t
ee959b00
TJ		 831show_fc_rport_supported_classes (struct device *dev,
832 struct device_attribute *attr, char *buf)
1da177e4 833{
ee959b00 834 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 835 if (rport->supported_classes == FC_COS_UNSPECIFIED)
836 return snprintf(buf, 20, "unspecified\n");
837 return get_fc_cos_names(rport->supported_classes, buf);
838}
ee959b00 839static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1da177e4
LT		 840 show_fc_rport_supported_classes, NULL);
841
842/* Dynamic Remote Port Attributes */
843
19a7b4ae
JSEC		 844/*
845 * dev_loss_tmo attribute
846 */
43ca910a
MC		 847static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
848{
849 char *cp;
850
851 *val = simple_strtoul(buf, &cp, 0);
852 if ((*cp && (*cp != '\n')) || (*val < 0))
853 return -EINVAL;
854 /*
855 * Check for overflow; dev_loss_tmo is u32
856 */
857 if (*val > UINT_MAX)
858 return -EINVAL;
859
860 return 0;
861}
862
863static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
864 unsigned long val)
19a7b4ae 865{
19a7b4ae
JSEC		 866 struct Scsi_Host *shost = rport_to_shost(rport);
867 struct fc_internal *i = to_fc_internal(shost->transportt);
43ca910a 868
19a7b4ae 869 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
42e33148 870 (rport->port_state == FC_PORTSTATE_DELETED) ||
19a7b4ae
JSEC		 871 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
872 return -EBUSY;
36dd288f
HR		 873 /*
874 * Check for overflow; dev_loss_tmo is u32
875 */
876 if (val > UINT_MAX)
877 return -EINVAL;
878
f2818663
HR		 879 /*
880 * If fast_io_fail is off we have to cap
881 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
882 */
883 if (rport->fast_io_fail_tmo == -1 &&
884 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
885 return -EINVAL;
886
19a7b4ae 887 i->f->set_rport_dev_loss_tmo(rport, val);
43ca910a
MC		 888 return 0;
889}
890
891fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
892static ssize_t
893store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
894 const char *buf, size_t count)
895{
896 struct fc_rport *rport = transport_class_to_rport(dev);
897 unsigned long val;
898 int rc;
899
900 rc = fc_str_to_dev_loss(buf, &val);
901 if (rc)
902 return rc;
903
904 rc = fc_rport_set_dev_loss_tmo(rport, val);
905 if (rc)
906 return rc;
19a7b4ae
JSEC		 907 return count;
908}
ee959b00 909static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
19a7b4ae 910 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1da177e4
LT		 911
912
913/* Private Remote Port Attributes */
914
915fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
916fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
917fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
918
919static ssize_t
ee959b00
TJ		 920show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
921 char *buf)
1da177e4 922{
ee959b00 923 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 924
925 /* identify any roles that are port_id specific */
926 if ((rport->port_id != -1) &&
927 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
928 FC_WELLKNOWN_PORTID_MASK) {
929 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
930 case FC_FPORT_PORTID:
931 return snprintf(buf, 30, "Fabric Port\n");
932 case FC_FABCTLR_PORTID:
933 return snprintf(buf, 30, "Fabric Controller\n");
934 case FC_DIRSRVR_PORTID:
935 return snprintf(buf, 30, "Directory Server\n");
936 case FC_TIMESRVR_PORTID:
937 return snprintf(buf, 30, "Time Server\n");
938 case FC_MGMTSRVR_PORTID:
939 return snprintf(buf, 30, "Management Server\n");
940 default:
941 return snprintf(buf, 30, "Unknown Fabric Entity\n");
942 }
943 } else {
a53eb5e0 944 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1da177e4 945 return snprintf(buf, 20, "unknown\n");
a53eb5e0 946 return get_fc_port_roles_names(rport->roles, buf);
1da177e4
LT		 947 }
948}
ee959b00 949static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1da177e4
LT		 950 show_fc_rport_roles, NULL);
951
952fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
953fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
954
0f29b966
JS		 955/*
956 * fast_io_fail_tmo attribute
957 */
958static ssize_t
ee959b00
TJ		 959show_fc_rport_fast_io_fail_tmo (struct device *dev,
960 struct device_attribute *attr, char *buf)
0f29b966 961{
ee959b00 962 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 963
964 if (rport->fast_io_fail_tmo == -1)
965 return snprintf(buf, 5, "off\n");
966 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
967}
968
969static ssize_t
ee959b00
TJ		 970store_fc_rport_fast_io_fail_tmo(struct device *dev,
971 struct device_attribute *attr, const char *buf,
972 size_t count)
0f29b966
JS		 973{
974 int val;
975 char *cp;
ee959b00 976 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 977
978 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
979 (rport->port_state == FC_PORTSTATE_DELETED) ||
980 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
981 return -EBUSY;
982 if (strncmp(buf, "off", 3) == 0)
983 rport->fast_io_fail_tmo = -1;
984 else {
985 val = simple_strtoul(buf, &cp, 0);
f2818663
HR		 986 if ((*cp && (*cp != '\n')) || (val < 0))
987 return -EINVAL;
988 /*
989 * Cap fast_io_fail by dev_loss_tmo or
990 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
991 */
992 if ((val >= rport->dev_loss_tmo) ||
993 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
0f29b966 994 return -EINVAL;
f2818663 995
0f29b966
JS		 996 rport->fast_io_fail_tmo = val;
997 }
998 return count;
999}
ee959b00 1000static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
0f29b966 1001 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1da177e4
LT		 1002
1003
1004/*
1005 * FC SCSI Target Attribute Management
1006 */
1007
1008/*
1009 * Note: in the target show function we recognize when the remote
732bee7a 1010 * port is in the hierarchy and do not allow the driver to get
1da177e4
LT		 1011 * involved in sysfs functions. The driver only gets involved if
1012 * it's the "old" style that doesn't use rports.
1013 */
1014#define fc_starget_show_function(field, format_string, sz, cast) \
1015static ssize_t \
ee959b00
TJ		 1016show_fc_starget_##field (struct device *dev, \
1017 struct device_attribute *attr, char *buf) \
1da177e4 1018{ \
ee959b00 1019 struct scsi_target *starget = transport_class_to_starget(dev); \
1da177e4
LT		 1020 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1021 struct fc_internal *i = to_fc_internal(shost->transportt); \
1022 struct fc_rport *rport = starget_to_rport(starget); \
1023 if (rport) \
1024 fc_starget_##field(starget) = rport->field; \
1025 else if (i->f->get_starget_##field) \
1026 i->f->get_starget_##field(starget); \
1027 return snprintf(buf, sz, format_string, \
1028 cast fc_starget_##field(starget)); \
1029}
1030
1031#define fc_starget_rd_attr(field, format_string, sz) \
1032 fc_starget_show_function(field, format_string, sz, ) \
ee959b00 1033static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 1034 show_fc_starget_##field, NULL)
1035
1036#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1037 fc_starget_show_function(field, format_string, sz, (cast)) \
ee959b00 1038static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 1039 show_fc_starget_##field, NULL)
1040
1041#define SETUP_STARGET_ATTRIBUTE_RD(field) \
ee959b00 1042 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 1043 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1044 i->private_starget_attrs[count].store = NULL; \
1045 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1046 if (i->f->show_starget_##field) \
1047 count++
1048
1049#define SETUP_STARGET_ATTRIBUTE_RW(field) \
ee959b00 1050 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 1051 if (!i->f->set_starget_##field) { \
1052 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1053 i->private_starget_attrs[count].store = NULL; \
1054 } \
1055 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1056 if (i->f->show_starget_##field) \
1057 count++
1058
1059/* The FC Transport SCSI Target Attributes: */
1060fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1061fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1062fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1063
1064
a53eb5e0
JS		 1065/*
1066 * FC Virtual Port Attribute Management
1067 */
1068
1069#define fc_vport_show_function(field, format_string, sz, cast) \
1070static ssize_t \
ee959b00
TJ		 1071show_fc_vport_##field (struct device *dev, \
1072 struct device_attribute *attr, char *buf) \
a53eb5e0 1073{ \
ee959b00 1074 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1075 struct Scsi_Host *shost = vport_to_shost(vport); \
1076 struct fc_internal *i = to_fc_internal(shost->transportt); \
1077 if ((i->f->get_vport_##field) && \
1078 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1079 i->f->get_vport_##field(vport); \
1080 return snprintf(buf, sz, format_string, cast vport->field); \
1081}
1082
1083#define fc_vport_store_function(field) \
1084static ssize_t \
ee959b00
TJ		 1085store_fc_vport_##field(struct device *dev, \
1086 struct device_attribute *attr, \
1087 const char *buf, size_t count) \
a53eb5e0
JS		 1088{ \
1089 int val; \
ee959b00 1090 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1091 struct Scsi_Host *shost = vport_to_shost(vport); \
1092 struct fc_internal *i = to_fc_internal(shost->transportt); \
1093 char *cp; \
1094 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1095 return -EBUSY; \
1096 val = simple_strtoul(buf, &cp, 0); \
1097 if (*cp && (*cp != '\n')) \
1098 return -EINVAL; \
1099 i->f->set_vport_##field(vport, val); \
1100 return count; \
1101}
1102
1103#define fc_vport_store_str_function(field, slen) \
1104static ssize_t \
ee959b00
TJ		 1105store_fc_vport_##field(struct device *dev, \
1106 struct device_attribute *attr, \
1107 const char *buf, size_t count) \
a53eb5e0 1108{ \
ee959b00 1109 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1110 struct Scsi_Host *shost = vport_to_shost(vport); \
1111 struct fc_internal *i = to_fc_internal(shost->transportt); \
1112 unsigned int cnt=count; \
1113 \
1114 /* count may include a LF at end of string */ \
1115 if (buf[cnt-1] == '\n') \
1116 cnt--; \
1117 if (cnt > ((slen) - 1)) \
1118 return -EINVAL; \
1119 memcpy(vport->field, buf, cnt); \
1120 i->f->set_vport_##field(vport); \
1121 return count; \
1122}
1123
1124#define fc_vport_rd_attr(field, format_string, sz) \
1125 fc_vport_show_function(field, format_string, sz, ) \
ee959b00 1126static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1127 show_fc_vport_##field, NULL)
1128
1129#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1130 fc_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1131static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1132 show_fc_vport_##field, NULL)
1133
1134#define fc_vport_rw_attr(field, format_string, sz) \
1135 fc_vport_show_function(field, format_string, sz, ) \
1136 fc_vport_store_function(field) \
ee959b00 1137static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1138 show_fc_vport_##field, \
1139 store_fc_vport_##field)
1140
1141#define fc_private_vport_show_function(field, format_string, sz, cast) \
1142static ssize_t \
ee959b00
TJ		 1143show_fc_vport_##field (struct device *dev, \
1144 struct device_attribute *attr, char *buf) \
a53eb5e0 1145{ \
ee959b00 1146 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1147 return snprintf(buf, sz, format_string, cast vport->field); \
1148}
1149
1150#define fc_private_vport_store_u32_function(field) \
1151static ssize_t \
ee959b00
TJ		 1152store_fc_vport_##field(struct device *dev, \
1153 struct device_attribute *attr, \
1154 const char *buf, size_t count) \
a53eb5e0
JS		 1155{ \
1156 u32 val; \
ee959b00 1157 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1158 char *cp; \
1159 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1160 return -EBUSY; \
1161 val = simple_strtoul(buf, &cp, 0); \
1162 if (*cp && (*cp != '\n')) \
1163 return -EINVAL; \
1164 vport->field = val; \
1165 return count; \
1166}
1167
1168
1169#define fc_private_vport_rd_attr(field, format_string, sz) \
1170 fc_private_vport_show_function(field, format_string, sz, ) \
ee959b00 1171static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1172 show_fc_vport_##field, NULL)
1173
1174#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1175 fc_private_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1176static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1177 show_fc_vport_##field, NULL)
1178
1179#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1180 fc_private_vport_show_function(field, format_string, sz, ) \
1181 fc_private_vport_store_u32_function(field) \
ee959b00 1182static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1183 show_fc_vport_##field, \
1184 store_fc_vport_##field)
1185
1186
1187#define fc_private_vport_rd_enum_attr(title, maxlen) \
1188static ssize_t \
ee959b00
TJ		 1189show_fc_vport_##title (struct device *dev, \
1190 struct device_attribute *attr, \
1191 char *buf) \
a53eb5e0 1192{ \
ee959b00 1193 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1194 const char *name; \
1195 name = get_fc_##title##_name(vport->title); \
1196 if (!name) \
1197 return -EINVAL; \
1198 return snprintf(buf, maxlen, "%s\n", name); \
1199} \
ee959b00 1200static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
a53eb5e0
JS		 1201 show_fc_vport_##title, NULL)
1202
1203
1204#define SETUP_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1205 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1206 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1207 i->private_vport_attrs[count].store = NULL; \
1208 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1209 if (i->f->get_##field) \
1210 count++
1211 /* NOTE: Above MACRO differs: checks function not show bit */
1212
1213#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1214 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1215 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1216 i->private_vport_attrs[count].store = NULL; \
1217 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1218 count++
1219
1220#define SETUP_VPORT_ATTRIBUTE_WR(field) \
ee959b00 1221 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1222 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1223 if (i->f->field) \
1224 count++
1225 /* NOTE: Above MACRO differs: checks function */
1226
1227#define SETUP_VPORT_ATTRIBUTE_RW(field) \
ee959b00 1228 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1229 if (!i->f->set_vport_##field) { \
1230 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1231 i->private_vport_attrs[count].store = NULL; \
1232 } \
1233 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1234 count++
1235 /* NOTE: Above MACRO differs: does not check show bit */
1236
1237#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1238{ \
ee959b00 1239 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1240 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1241 count++; \
1242}
1243
1244
1245/* The FC Transport Virtual Port Attributes: */
1246
1247/* Fixed Virtual Port Attributes */
1248
1249/* Dynamic Virtual Port Attributes */
1250
1251/* Private Virtual Port Attributes */
1252
1253fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1254fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1255fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1256fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1257
1258static ssize_t
ee959b00
TJ		 1259show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1260 char *buf)
a53eb5e0 1261{
ee959b00 1262 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1263
1264 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1265 return snprintf(buf, 20, "unknown\n");
1266 return get_fc_port_roles_names(vport->roles, buf);
1267}
ee959b00 1268static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
a53eb5e0
JS		 1269
1270fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1271
1272fc_private_vport_show_function(symbolic_name, "%s\n",
1273 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1274fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
ee959b00 1275static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
a53eb5e0
JS		 1276 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1277
1278static ssize_t
ee959b00
TJ		 1279store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1280 const char *buf, size_t count)
a53eb5e0 1281{
ee959b00 1282 struct fc_vport *vport = transport_class_to_vport(dev);
9ef3e4a4 1283 struct Scsi_Host *shost = vport_to_shost(vport);
0d9dc7c8
GR		 1284 unsigned long flags;
1285
1286 spin_lock_irqsave(shost->host_lock, flags);
1287 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1288 spin_unlock_irqrestore(shost->host_lock, flags);
1289 return -EBUSY;
1290 }
1291 vport->flags |= FC_VPORT_DELETING;
1292 spin_unlock_irqrestore(shost->host_lock, flags);
a53eb5e0 1293
9ef3e4a4 1294 fc_queue_work(shost, &vport->vport_delete_work);
a53eb5e0
JS		 1295 return count;
1296}
ee959b00 1297static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
a53eb5e0
JS		 1298 NULL, store_fc_vport_delete);
1299
1300
1301/*
1302 * Enable/Disable vport
1303 * Write "1" to disable, write "0" to enable
1304 */
1305static ssize_t
ee959b00
TJ		 1306store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1307 const char *buf,
a53eb5e0
JS		 1308 size_t count)
1309{
ee959b00 1310 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1311 struct Scsi_Host *shost = vport_to_shost(vport);
1312 struct fc_internal *i = to_fc_internal(shost->transportt);
1313 int stat;
1314
1315 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1316 return -EBUSY;
1317
1318 if (*buf == '0') {
1319 if (vport->vport_state != FC_VPORT_DISABLED)
1320 return -EALREADY;
1321 } else if (*buf == '1') {
1322 if (vport->vport_state == FC_VPORT_DISABLED)
1323 return -EALREADY;
1324 } else
1325 return -EINVAL;
1326
1327 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1328 return stat ? stat : count;
1329}
ee959b00 1330static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
a53eb5e0
JS		 1331 NULL, store_fc_vport_disable);
1332
1333
1da177e4
LT		 1334/*
1335 * Host Attribute Management
1336 */
1337
1338#define fc_host_show_function(field, format_string, sz, cast) \
1339static ssize_t \
ee959b00
TJ		 1340show_fc_host_##field (struct device *dev, \
1341 struct device_attribute *attr, char *buf) \
1da177e4 1342{ \
ee959b00 1343 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1344 struct fc_internal *i = to_fc_internal(shost->transportt); \
1345 if (i->f->get_host_##field) \
1346 i->f->get_host_##field(shost); \
1347 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1348}
1349
1350#define fc_host_store_function(field) \
1351static ssize_t \
ee959b00
TJ		 1352store_fc_host_##field(struct device *dev, \
1353 struct device_attribute *attr, \
1354 const char *buf, size_t count) \
1da177e4
LT		 1355{ \
1356 int val; \
ee959b00 1357 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4 1358 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 1359 char *cp; \
1da177e4 1360 \
0f29b966
JS		 1361 val = simple_strtoul(buf, &cp, 0); \
1362 if (*cp && (*cp != '\n')) \
1363 return -EINVAL; \
1da177e4
LT		 1364 i->f->set_host_##field(shost, val); \
1365 return count; \
1366}
1367
b8d08210
JS		 1368#define fc_host_store_str_function(field, slen) \
1369static ssize_t \
ee959b00
TJ		 1370store_fc_host_##field(struct device *dev, \
1371 struct device_attribute *attr, \
1372 const char *buf, size_t count) \
b8d08210 1373{ \
ee959b00 1374 struct Scsi_Host *shost = transport_class_to_shost(dev); \
b8d08210
JS		 1375 struct fc_internal *i = to_fc_internal(shost->transportt); \
1376 unsigned int cnt=count; \
1377 \
1378 /* count may include a LF at end of string */ \
1379 if (buf[cnt-1] == '\n') \
1380 cnt--; \
1381 if (cnt > ((slen) - 1)) \
1382 return -EINVAL; \
1383 memcpy(fc_host_##field(shost), buf, cnt); \
1384 i->f->set_host_##field(shost); \
1385 return count; \
1386}
1387
1da177e4
LT		 1388#define fc_host_rd_attr(field, format_string, sz) \
1389 fc_host_show_function(field, format_string, sz, ) \
ee959b00 1390static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1391 show_fc_host_##field, NULL)
1392
1393#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1394 fc_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1395static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1396 show_fc_host_##field, NULL)
1397
1398#define fc_host_rw_attr(field, format_string, sz) \
1399 fc_host_show_function(field, format_string, sz, ) \
1400 fc_host_store_function(field) \
ee959b00 1401static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 1402 show_fc_host_##field, \
1403 store_fc_host_##field)
1404
1405#define fc_host_rd_enum_attr(title, maxlen) \
1406static ssize_t \
ee959b00
TJ		 1407show_fc_host_##title (struct device *dev, \
1408 struct device_attribute *attr, char *buf) \
1da177e4 1409{ \
ee959b00 1410 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1411 struct fc_internal *i = to_fc_internal(shost->transportt); \
1412 const char *name; \
1413 if (i->f->get_host_##title) \
1414 i->f->get_host_##title(shost); \
1415 name = get_fc_##title##_name(fc_host_##title(shost)); \
1416 if (!name) \
1417 return -EINVAL; \
1418 return snprintf(buf, maxlen, "%s\n", name); \
1419} \
ee959b00 1420static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1da177e4
LT		 1421
1422#define SETUP_HOST_ATTRIBUTE_RD(field) \
ee959b00 1423 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1424 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1425 i->private_host_attrs[count].store = NULL; \
1426 i->host_attrs[count] = &i->private_host_attrs[count]; \
1427 if (i->f->show_host_##field) \
1428 count++
1429
a53eb5e0 1430#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
ee959b00 1431 i->private_host_attrs[count] = device_attr_host_##field; \
a53eb5e0
JS		 1432 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1433 i->private_host_attrs[count].store = NULL; \
1434 i->host_attrs[count] = &i->private_host_attrs[count]; \
1435 count++
1436
1da177e4 1437#define SETUP_HOST_ATTRIBUTE_RW(field) \
ee959b00 1438 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1439 if (!i->f->set_host_##field) { \
1440 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1441 i->private_host_attrs[count].store = NULL; \
1442 } \
1443 i->host_attrs[count] = &i->private_host_attrs[count]; \
1444 if (i->f->show_host_##field) \
1445 count++
1446
1447
1448#define fc_private_host_show_function(field, format_string, sz, cast) \
1449static ssize_t \
ee959b00
TJ		 1450show_fc_host_##field (struct device *dev, \
1451 struct device_attribute *attr, char *buf) \
1da177e4 1452{ \
ee959b00 1453 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1454 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1455}
1456
1457#define fc_private_host_rd_attr(field, format_string, sz) \
1458 fc_private_host_show_function(field, format_string, sz, ) \
ee959b00 1459static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1460 show_fc_host_##field, NULL)
1461
1462#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1463 fc_private_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1464static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1465 show_fc_host_##field, NULL)
1466
1467#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
ee959b00 1468 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1469 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1470 i->private_host_attrs[count].store = NULL; \
1471 i->host_attrs[count] = &i->private_host_attrs[count]; \
1472 count++
1473
1474#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
91ca7b01 1475{ \
ee959b00 1476 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4 1477 i->host_attrs[count] = &i->private_host_attrs[count]; \
91ca7b01
AV		 1478 count++; \
1479}
1da177e4
LT		 1480
1481
1482/* Fixed Host Attributes */
1483
1484static ssize_t
ee959b00
TJ		 1485show_fc_host_supported_classes (struct device *dev,
1486 struct device_attribute *attr, char *buf)
1da177e4 1487{
ee959b00 1488 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1489
1490 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1491 return snprintf(buf, 20, "unspecified\n");
1492
1493 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1494}
ee959b00 1495static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1da177e4
LT		 1496 show_fc_host_supported_classes, NULL);
1497
1498static ssize_t
ee959b00
TJ		 1499show_fc_host_supported_fc4s (struct device *dev,
1500 struct device_attribute *attr, char *buf)
1da177e4 1501{
ee959b00 1502 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1503 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1504}
ee959b00 1505static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1da177e4
LT		 1506 show_fc_host_supported_fc4s, NULL);
1507
1508static ssize_t
ee959b00
TJ		 1509show_fc_host_supported_speeds (struct device *dev,
1510 struct device_attribute *attr, char *buf)
1da177e4 1511{
ee959b00 1512 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1513
1514 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1515 return snprintf(buf, 20, "unknown\n");
1516
1517 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1518}
ee959b00 1519static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1da177e4
LT		 1520 show_fc_host_supported_speeds, NULL);
1521
1522
1523fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1524fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
6b7281d0
AH		 1525fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1526 unsigned long long);
1da177e4 1527fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
a53eb5e0 1528fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1da177e4 1529fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
bb8ef587
NP		 1530fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1531fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1532fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1533fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1534fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1535fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1da177e4
LT		 1537
1538
1539/* Dynamic Host Attributes */
1540
1541static ssize_t
ee959b00
TJ		 1542show_fc_host_active_fc4s (struct device *dev,
1543 struct device_attribute *attr, char *buf)
1da177e4 1544{
ee959b00 1545 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1546 struct fc_internal *i = to_fc_internal(shost->transportt);
1547
1548 if (i->f->get_host_active_fc4s)
1549 i->f->get_host_active_fc4s(shost);
1550
1551 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1552}
ee959b00 1553static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1da177e4
LT		 1554 show_fc_host_active_fc4s, NULL);
1555
1556static ssize_t
ee959b00
TJ		 1557show_fc_host_speed (struct device *dev,
1558 struct device_attribute *attr, char *buf)
1da177e4 1559{
ee959b00 1560 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1561 struct fc_internal *i = to_fc_internal(shost->transportt);
1562
1563 if (i->f->get_host_speed)
1564 i->f->get_host_speed(shost);
1565
1566 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1567 return snprintf(buf, 20, "unknown\n");
1568
1569 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1570}
ee959b00 1571static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1da177e4
LT		 1572 show_fc_host_speed, NULL);
1573
1574
1575fc_host_rd_attr(port_id, "0x%06x\n", 20);
1576fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1577fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1578fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
016131b8 1579fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1da177e4 1580
b8d08210
JS		 1581fc_private_host_show_function(system_hostname, "%s\n",
1582 FC_SYMBOLIC_NAME_SIZE + 1, )
1583fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
ee959b00 1584static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
b8d08210
JS		 1585 show_fc_host_system_hostname, store_fc_host_system_hostname);
1586
1da177e4
LT		 1587
1588/* Private Host Attributes */
1589
1590static ssize_t
ee959b00
TJ		 1591show_fc_private_host_tgtid_bind_type(struct device *dev,
1592 struct device_attribute *attr, char *buf)
1da177e4 1593{
ee959b00 1594 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1595 const char *name;
1596
1597 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1598 if (!name)
1599 return -EINVAL;
1600 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1601}
1602
d16794f6
JSEC		 1603#define get_list_head_entry(pos, head, member) \
1604 pos = list_entry((head)->next, typeof(*pos), member)
1605
1da177e4 1606static ssize_t
ee959b00
TJ		 1607store_fc_private_host_tgtid_bind_type(struct device *dev,
1608 struct device_attribute *attr, const char *buf, size_t count)
1da177e4 1609{
ee959b00 1610 struct Scsi_Host *shost = transport_class_to_shost(dev);
d16794f6 1611 struct fc_rport *rport;
1da177e4
LT		 1612 enum fc_tgtid_binding_type val;
1613 unsigned long flags;
1614
1615 if (get_fc_tgtid_bind_type_match(buf, &val))
1616 return -EINVAL;
1617
1618 /* if changing bind type, purge all unused consistent bindings */
1619 if (val != fc_host_tgtid_bind_type(shost)) {
1620 spin_lock_irqsave(shost->host_lock, flags);
d16794f6
JSEC		 1621 while (!list_empty(&fc_host_rport_bindings(shost))) {
1622 get_list_head_entry(rport,
1623 &fc_host_rport_bindings(shost), peers);
aedf3497
JS		 1624 list_del(&rport->peers);
1625 rport->port_state = FC_PORTSTATE_DELETED;
1626 fc_queue_work(shost, &rport->rport_delete_work);
d16794f6 1627 }
1da177e4
LT		 1628 spin_unlock_irqrestore(shost->host_lock, flags);
1629 }
1630
1631 fc_host_tgtid_bind_type(shost) = val;
1632 return count;
1633}
1634
ee959b00 1635static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1da177e4
LT		 1636 show_fc_private_host_tgtid_bind_type,
1637 store_fc_private_host_tgtid_bind_type);
1638
91ca7b01 1639static ssize_t
ee959b00
TJ		 1640store_fc_private_host_issue_lip(struct device *dev,
1641 struct device_attribute *attr, const char *buf, size_t count)
91ca7b01 1642{
ee959b00 1643 struct Scsi_Host *shost = transport_class_to_shost(dev);
91ca7b01
AV		 1644 struct fc_internal *i = to_fc_internal(shost->transportt);
1645 int ret;
1646
1647 /* ignore any data value written to the attribute */
1648 if (i->f->issue_fc_host_lip) {
1649 ret = i->f->issue_fc_host_lip(shost);
1650 return ret ? ret: count;
1651 }
1652
1653 return -ENOENT;
1654}
1655
ee959b00 1656static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
91ca7b01
AV		 1657 store_fc_private_host_issue_lip);
1658
43ca910a
MC		 1659static ssize_t
1660store_fc_private_host_dev_loss_tmo(struct device *dev,
1661 struct device_attribute *attr,
1662 const char *buf, size_t count)
1663{
1664 struct Scsi_Host *shost = transport_class_to_shost(dev);
1665 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1666 struct fc_rport *rport;
1667 unsigned long val, flags;
1668 int rc;
1669
1670 rc = fc_str_to_dev_loss(buf, &val);
1671 if (rc)
1672 return rc;
1673
1674 fc_host_dev_loss_tmo(shost) = val;
1675 spin_lock_irqsave(shost->host_lock, flags);
1676 list_for_each_entry(rport, &fc_host->rports, peers)
1677 fc_rport_set_dev_loss_tmo(rport, val);
1678 spin_unlock_irqrestore(shost->host_lock, flags);
1679 return count;
1680}
a53eb5e0 1681
43ca910a
MC		 1682fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1683static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1684 show_fc_host_dev_loss_tmo,
1685 store_fc_private_host_dev_loss_tmo);
1686
1687fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
a53eb5e0 1688
1da177e4
LT		 1689/*
1690 * Host Statistics Management
1691 */
1692
1693/* Show a given an attribute in the statistics group */
1694static ssize_t
ee959b00 1695fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1da177e4 1696{
ee959b00 1697 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1698 struct fc_internal *i = to_fc_internal(shost->transportt);
1699 struct fc_host_statistics *stats;
1700 ssize_t ret = -ENOENT;
1701
1702 if (offset > sizeof(struct fc_host_statistics) ||
1703 offset % sizeof(u64) != 0)
1704 WARN_ON(1);
1705
1706 if (i->f->get_fc_host_stats) {
1707 stats = (i->f->get_fc_host_stats)(shost);
1708 if (stats)
1709 ret = snprintf(buf, 20, "0x%llx\n",
1710 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1711 }
1712 return ret;
1713}
1714
1715
1716/* generate a read-only statistics attribute */
1717#define fc_host_statistic(name) \
ee959b00
TJ		 1718static ssize_t show_fcstat_##name(struct device *cd, \
1719 struct device_attribute *attr, \
1720 char *buf) \
1da177e4
LT		 1721{ \
1722 return fc_stat_show(cd, buf, \
1723 offsetof(struct fc_host_statistics, name)); \
1724} \
ee959b00 1725static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1da177e4
LT		 1726
1727fc_host_statistic(seconds_since_last_reset);
1728fc_host_statistic(tx_frames);
1729fc_host_statistic(tx_words);
1730fc_host_statistic(rx_frames);
1731fc_host_statistic(rx_words);
1732fc_host_statistic(lip_count);
1733fc_host_statistic(nos_count);
1734fc_host_statistic(error_frames);
1735fc_host_statistic(dumped_frames);
1736fc_host_statistic(link_failure_count);
1737fc_host_statistic(loss_of_sync_count);
1738fc_host_statistic(loss_of_signal_count);
1739fc_host_statistic(prim_seq_protocol_err_count);
1740fc_host_statistic(invalid_tx_word_count);
1741fc_host_statistic(invalid_crc_count);
1742fc_host_statistic(fcp_input_requests);
1743fc_host_statistic(fcp_output_requests);
1744fc_host_statistic(fcp_control_requests);
1745fc_host_statistic(fcp_input_megabytes);
1746fc_host_statistic(fcp_output_megabytes);
1747
1748static ssize_t
ee959b00
TJ		 1749fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1750 const char *buf, size_t count)
1da177e4 1751{
ee959b00 1752 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1753 struct fc_internal *i = to_fc_internal(shost->transportt);
1754
1755 /* ignore any data value written to the attribute */
1756 if (i->f->reset_fc_host_stats) {
1757 i->f->reset_fc_host_stats(shost);
1758 return count;
1759 }
1760
1761 return -ENOENT;
1762}
ee959b00 1763static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1da177e4
LT		 1764 fc_reset_statistics);
1765
1da177e4 1766static struct attribute *fc_statistics_attrs[] = {
ee959b00
TJ		 1767 &device_attr_host_seconds_since_last_reset.attr,
1768 &device_attr_host_tx_frames.attr,
1769 &device_attr_host_tx_words.attr,
1770 &device_attr_host_rx_frames.attr,
1771 &device_attr_host_rx_words.attr,
1772 &device_attr_host_lip_count.attr,
1773 &device_attr_host_nos_count.attr,
1774 &device_attr_host_error_frames.attr,
1775 &device_attr_host_dumped_frames.attr,
1776 &device_attr_host_link_failure_count.attr,
1777 &device_attr_host_loss_of_sync_count.attr,
1778 &device_attr_host_loss_of_signal_count.attr,
1779 &device_attr_host_prim_seq_protocol_err_count.attr,
1780 &device_attr_host_invalid_tx_word_count.attr,
1781 &device_attr_host_invalid_crc_count.attr,
1782 &device_attr_host_fcp_input_requests.attr,
1783 &device_attr_host_fcp_output_requests.attr,
1784 &device_attr_host_fcp_control_requests.attr,
1785 &device_attr_host_fcp_input_megabytes.attr,
1786 &device_attr_host_fcp_output_megabytes.attr,
1787 &device_attr_host_reset_statistics.attr,
1da177e4
LT		 1788 NULL
1789};
1790
1791static struct attribute_group fc_statistics_group = {
1792 .name = "statistics",
1793 .attrs = fc_statistics_attrs,
1794};
1795
a53eb5e0
JS		 1796
1797/* Host Vport Attributes */
1798
1799static int
1800fc_parse_wwn(const char *ns, u64 *nm)
1801{
1802 unsigned int i, j;
1803 u8 wwn[8];
1804
1805 memset(wwn, 0, sizeof(wwn));
1806
1807 /* Validate and store the new name */
1808 for (i=0, j=0; i < 16; i++) {
ecc30990
AS		 1809 int value;
1810
1811 value = hex_to_bin(*ns++);
1812 if (value >= 0)
1813 j = (j << 4) | value;
a53eb5e0
JS		 1814 else
1815 return -EINVAL;
1816 if (i % 2) {
1817 wwn[i/2] = j & 0xff;
1818 j = 0;
1819 }
1820 }
1821
1822 *nm = wwn_to_u64(wwn);
1823
1824 return 0;
1825}
1826
1827
1828/*
1829 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1830 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1831 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1832 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1833 */
1834static ssize_t
ee959b00
TJ		 1835store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1836 const char *buf, size_t count)
a53eb5e0 1837{
ee959b00 1838 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1839 struct fc_vport_identifiers vid;
1840 struct fc_vport *vport;
1841 unsigned int cnt=count;
1842 int stat;
1843
1844 memset(&vid, 0, sizeof(vid));
1845
1846 /* count may include a LF at end of string */
1847 if (buf[cnt-1] == '\n')
1848 cnt--;
1849
1850 /* validate we have enough characters for WWPN */
1851 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1852 return -EINVAL;
1853
1854 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1855 if (stat)
1856 return stat;
1857
1858 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1859 if (stat)
1860 return stat;
1861
1862 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1863 vid.vport_type = FC_PORTTYPE_NPIV;
1864 /* vid.symbolic_name is already zero/NULL's */
1865 vid.disable = false; /* always enabled */
1866
1867 /* we only allow support on Channel 0 !!! */
a30c3f69 1868 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
a53eb5e0
JS		 1869 return stat ? stat : count;
1870}
ee959b00 1871static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
a53eb5e0
JS		 1872 store_fc_host_vport_create);
1873
1874
1875/*
1876 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1877 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1878 * The WWNs are specified as hex characters, and may *not* contain
1879 * any prefixes (e.g. 0x, x, etc)
1880 */
1881static ssize_t
ee959b00
TJ		 1882store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1883 const char *buf, size_t count)
a53eb5e0 1884{
ee959b00 1885 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1886 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1887 struct fc_vport *vport;
1888 u64 wwpn, wwnn;
1889 unsigned long flags;
1890 unsigned int cnt=count;
1891 int stat, match;
1892
1893 /* count may include a LF at end of string */
1894 if (buf[cnt-1] == '\n')
1895 cnt--;
1896
1897 /* validate we have enough characters for WWPN */
1898 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1899 return -EINVAL;
1900
1901 stat = fc_parse_wwn(&buf[0], &wwpn);
1902 if (stat)
1903 return stat;
1904
1905 stat = fc_parse_wwn(&buf[17], &wwnn);
1906 if (stat)
1907 return stat;
1908
1909 spin_lock_irqsave(shost->host_lock, flags);
1910 match = 0;
1911 /* we only allow support on Channel 0 !!! */
1912 list_for_each_entry(vport, &fc_host->vports, peers) {
1913 if ((vport->channel == 0) &&
1914 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
0d9dc7c8
GR		 1915 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1916 break;
1917 vport->flags |= FC_VPORT_DELETING;
a53eb5e0
JS		 1918 match = 1;
1919 break;
1920 }
1921 }
1922 spin_unlock_irqrestore(shost->host_lock, flags);
1923
1924 if (!match)
1925 return -ENODEV;
1926
1927 stat = fc_vport_terminate(vport);
1928 return stat ? stat : count;
1929}
ee959b00 1930static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
a53eb5e0
JS		 1931 store_fc_host_vport_delete);
1932
1933
1da177e4
LT		 1934static int fc_host_match(struct attribute_container *cont,
1935 struct device *dev)
1936{
1937 struct Scsi_Host *shost;
1938 struct fc_internal *i;
1939
1940 if (!scsi_is_host_device(dev))
1941 return 0;
1942
1943 shost = dev_to_shost(dev);
1944 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1945 != &fc_host_class.class)
1946 return 0;
1947
1948 i = to_fc_internal(shost->transportt);
1949
1950 return &i->t.host_attrs.ac == cont;
1951}
1952
1953static int fc_target_match(struct attribute_container *cont,
1954 struct device *dev)
1955{
1956 struct Scsi_Host *shost;
1957 struct fc_internal *i;
1958
1959 if (!scsi_is_target_device(dev))
1960 return 0;
1961
1962 shost = dev_to_shost(dev->parent);
1963 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1964 != &fc_host_class.class)
1965 return 0;
1966
1967 i = to_fc_internal(shost->transportt);
1968
1969 return &i->t.target_attrs.ac == cont;
1970}
1971
1972static void fc_rport_dev_release(struct device *dev)
1973{
1974 struct fc_rport *rport = dev_to_rport(dev);
1975 put_device(dev->parent);
1976 kfree(rport);
1977}
1978
1979int scsi_is_fc_rport(const struct device *dev)
1980{
1981 return dev->release == fc_rport_dev_release;
1982}
1983EXPORT_SYMBOL(scsi_is_fc_rport);
1984
1985static int fc_rport_match(struct attribute_container *cont,
1986 struct device *dev)
1987{
1988 struct Scsi_Host *shost;
1989 struct fc_internal *i;
1990
1991 if (!scsi_is_fc_rport(dev))
1992 return 0;
1993
1994 shost = dev_to_shost(dev->parent);
1995 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1996 != &fc_host_class.class)
1997 return 0;
1998
1999 i = to_fc_internal(shost->transportt);
2000
2001 return &i->rport_attr_cont.ac == cont;
2002}
2003
5c44cd2a 2004
a53eb5e0
JS		 2005static void fc_vport_dev_release(struct device *dev)
2006{
2007 struct fc_vport *vport = dev_to_vport(dev);
2008 put_device(dev->parent); /* release kobj parent */
2009 kfree(vport);
2010}
2011
2012int scsi_is_fc_vport(const struct device *dev)
2013{
2014 return dev->release == fc_vport_dev_release;
2015}
2016EXPORT_SYMBOL(scsi_is_fc_vport);
2017
2018static int fc_vport_match(struct attribute_container *cont,
2019 struct device *dev)
2020{
2021 struct fc_vport *vport;
2022 struct Scsi_Host *shost;
2023 struct fc_internal *i;
2024
2025 if (!scsi_is_fc_vport(dev))
2026 return 0;
2027 vport = dev_to_vport(dev);
2028
2029 shost = vport_to_shost(vport);
2030 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2031 != &fc_host_class.class)
2032 return 0;
2033
2034 i = to_fc_internal(shost->transportt);
2035 return &i->vport_attr_cont.ac == cont;
2036}
2037
2038
c829c394
JS		 2039/**
2040 * fc_timed_out - FC Transport I/O timeout intercept handler
c829c394
JS		 2041 * @scmd: The SCSI command which timed out
2042 *
2043 * This routine protects against error handlers getting invoked while a
2044 * rport is in a blocked state, typically due to a temporarily loss of
2045 * connectivity. If the error handlers are allowed to proceed, requests
2046 * to abort i/o, reset the target, etc will likely fail as there is no way
2047 * to communicate with the device to perform the requested function. These
2048 * failures may result in the midlayer taking the device offline, requiring
2049 * manual intervention to restore operation.
2050 *
2051 * This routine, called whenever an i/o times out, validates the state of
2052 * the underlying rport. If the rport is blocked, it returns
2053 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2054 * Eventually, either the device will return, or devloss_tmo will fire,
2055 * and when the timeout then fires, it will be handled normally.
2056 * If the rport is not blocked, normal error handling continues.
2057 *
2058 * Notes:
2059 * This routine assumes no locks are held on entry.
eb44820c 2060 */
242f9dcb 2061static enum blk_eh_timer_return
c829c394
JS		 2062fc_timed_out(struct scsi_cmnd *scmd)
2063{
2064 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2065
2066 if (rport->port_state == FC_PORTSTATE_BLOCKED)
242f9dcb 2067 return BLK_EH_RESET_TIMER;
c829c394 2068
242f9dcb 2069 return BLK_EH_NOT_HANDLED;
c829c394
JS		 2070}
2071
5c44cd2a 2072/*
bda23253
JS		 2073 * Called by fc_user_scan to locate an rport on the shost that
2074 * matches the channel and target id, and invoke scsi_scan_target()
2075 * on the rport.
5c44cd2a 2076 */
bda23253
JS		 2077static void
2078fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
5c44cd2a
JSEC		 2079{
2080 struct fc_rport *rport;
bda23253
JS		 2081 unsigned long flags;
2082
2083 spin_lock_irqsave(shost->host_lock, flags);
5c44cd2a 2084
e02f3f59
CH		 2085 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2086 if (rport->scsi_target_id == -1)
2087 continue;
5c44cd2a 2088
0d2fcd9f
HR		 2089 if (rport->port_state != FC_PORTSTATE_ONLINE)
2090 continue;
2091
bda23253
JS		 2092 if ((channel == rport->channel) &&
2093 (id == rport->scsi_target_id)) {
2094 spin_unlock_irqrestore(shost->host_lock, flags);
2095 scsi_scan_target(&rport->dev, channel, id, lun, 1);
2096 return;
e02f3f59
CH		 2097 }
2098 }
2099
bda23253
JS		 2100 spin_unlock_irqrestore(shost->host_lock, flags);
2101}
2102
2103/*
2104 * Called via sysfs scan routines. Necessary, as the FC transport
2105 * wants to place all target objects below the rport object. So this
2106 * routine must invoke the scsi_scan_target() routine with the rport
2107 * object as the parent.
2108 */
2109static int
2110fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2111{
2112 uint chlo, chhi;
2113 uint tgtlo, tgthi;
2114
2115 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2116 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2117 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2118 return -EINVAL;
2119
2120 if (channel == SCAN_WILD_CARD) {
2121 chlo = 0;
2122 chhi = shost->max_channel + 1;
2123 } else {
2124 chlo = channel;
2125 chhi = channel + 1;
2126 }
2127
2128 if (id == SCAN_WILD_CARD) {
2129 tgtlo = 0;
2130 tgthi = shost->max_id;
2131 } else {
2132 tgtlo = id;
2133 tgthi = id + 1;
2134 }
2135
2136 for ( ; chlo < chhi; chlo++)
2137 for ( ; tgtlo < tgthi; tgtlo++)
2138 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2139
e02f3f59 2140 return 0;
5c44cd2a
JSEC		 2141}
2142
7525236d
FT		 2143static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2144 int result)
2145{
2146 struct fc_internal *i = to_fc_internal(shost->transportt);
2147 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2148}
2149
2150static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2151{
2152 struct fc_internal *i = to_fc_internal(shost->transportt);
2153 return i->f->it_nexus_response(shost, nexus, result);
2154}
2155
1da177e4
LT		 2156struct scsi_transport_template *
2157fc_attach_transport(struct fc_function_template *ft)
2158{
1da177e4 2159 int count;
24669f75
JS		 2160 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2161 GFP_KERNEL);
1da177e4
LT		 2162
2163 if (unlikely(!i))
2164 return NULL;
2165
1da177e4
LT		 2166 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2167 i->t.target_attrs.ac.class = &fc_transport_class.class;
2168 i->t.target_attrs.ac.match = fc_target_match;
2169 i->t.target_size = sizeof(struct fc_starget_attrs);
2170 transport_container_register(&i->t.target_attrs);
2171
2172 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2173 i->t.host_attrs.ac.class = &fc_host_class.class;
2174 i->t.host_attrs.ac.match = fc_host_match;
2175 i->t.host_size = sizeof(struct fc_host_attrs);
2176 if (ft->get_fc_host_stats)
2177 i->t.host_attrs.statistics = &fc_statistics_group;
2178 transport_container_register(&i->t.host_attrs);
2179
2180 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2181 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2182 i->rport_attr_cont.ac.match = fc_rport_match;
2183 transport_container_register(&i->rport_attr_cont);
2184
a53eb5e0
JS		 2185 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2186 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2187 i->vport_attr_cont.ac.match = fc_vport_match;
2188 transport_container_register(&i->vport_attr_cont);
2189
1da177e4
LT		 2190 i->f = ft;
2191
2192 /* Transport uses the shost workq for scsi scanning */
2193 i->t.create_work_queue = 1;
5c44cd2a 2194
c829c394
JS		 2195 i->t.eh_timed_out = fc_timed_out;
2196
e02f3f59 2197 i->t.user_scan = fc_user_scan;
9ef3e4a4 2198
7525236d
FT		 2199 /* target-mode drivers' functions */
2200 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2201 i->t.it_nexus_response = fc_it_nexus_response;
2202
1da177e4
LT		 2203 /*
2204 * Setup SCSI Target Attributes.
2205 */
2206 count = 0;
2207 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2208 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2209 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2210
2211 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2212
2213 i->starget_attrs[count] = NULL;
2214
2215
2216 /*
2217 * Setup SCSI Host Attributes.
2218 */
2219 count=0;
2220 SETUP_HOST_ATTRIBUTE_RD(node_name);
2221 SETUP_HOST_ATTRIBUTE_RD(port_name);
6b7281d0 2222 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1da177e4
LT		 2223 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2224 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1da177e4
LT		 2225 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2226 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
a53eb5e0
JS		 2227 if (ft->vport_create) {
2228 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2229 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2230 }
1da177e4 2231 SETUP_HOST_ATTRIBUTE_RD(serial_number);
bb8ef587
NP		 2232 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2233 SETUP_HOST_ATTRIBUTE_RD(model);
2234 SETUP_HOST_ATTRIBUTE_RD(model_description);
2235 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2236 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2237 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2238 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
1da177e4
LT		 2239
2240 SETUP_HOST_ATTRIBUTE_RD(port_id);
2241 SETUP_HOST_ATTRIBUTE_RD(port_type);
2242 SETUP_HOST_ATTRIBUTE_RD(port_state);
2243 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2244 SETUP_HOST_ATTRIBUTE_RD(speed);
2245 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
016131b8 2246 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
b8d08210 2247 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
1da177e4
LT		 2248
2249 /* Transport-managed attributes */
43ca910a 2250 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
1da177e4 2251 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
91ca7b01
AV		 2252 if (ft->issue_fc_host_lip)
2253 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
a53eb5e0
JS		 2254 if (ft->vport_create)
2255 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2256 if (ft->vport_delete)
2257 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
1da177e4
LT		 2258
2259 BUG_ON(count > FC_HOST_NUM_ATTRS);
2260
2261 i->host_attrs[count] = NULL;
2262
2263 /*
2264 * Setup Remote Port Attributes.
2265 */
2266 count=0;
2267 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2268 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2269 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2270 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2271 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2272 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2273 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2274 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2275 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
fff9d40c 2276 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
1da177e4
LT		 2277
2278 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2279
2280 i->rport_attrs[count] = NULL;
2281
a53eb5e0
JS		 2282 /*
2283 * Setup Virtual Port Attributes.
2284 */
2285 count=0;
2286 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2287 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2288 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2289 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2290 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2291 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2292 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2293 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2294 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2295
2296 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2297
2298 i->vport_attrs[count] = NULL;
2299
1da177e4
LT		 2300 return &i->t;
2301}
2302EXPORT_SYMBOL(fc_attach_transport);
2303
2304void fc_release_transport(struct scsi_transport_template *t)
2305{
2306 struct fc_internal *i = to_fc_internal(t);
2307
2308 transport_container_unregister(&i->t.target_attrs);
2309 transport_container_unregister(&i->t.host_attrs);
2310 transport_container_unregister(&i->rport_attr_cont);
a53eb5e0 2311 transport_container_unregister(&i->vport_attr_cont);
1da177e4
LT		 2312
2313 kfree(i);
2314}
2315EXPORT_SYMBOL(fc_release_transport);
2316
aedf3497
JS		 2317/**
2318 * fc_queue_work - Queue work to the fc_host workqueue.
2319 * @shost: Pointer to Scsi_Host bound to fc_host.
2320 * @work: Work to queue for execution.
2321 *
2322 * Return value:
a0785edf
JS		 2323 * 1 - work queued for execution
2324 * 0 - work is already queued
2325 * -EINVAL - work queue doesn't exist
eb44820c 2326 */
aedf3497
JS		 2327static int
2328fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2329{
2330 if (unlikely(!fc_host_work_q(shost))) {
2331 printk(KERN_ERR
2332 "ERROR: FC host '%s' attempted to queue work, "
2333 "when no workqueue created.\n", shost->hostt->name);
2334 dump_stack();
2335
2336 return -EINVAL;
2337 }
2338
2339 return queue_work(fc_host_work_q(shost), work);
2340}
2341
2342/**
2343 * fc_flush_work - Flush a fc_host's workqueue.
2344 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2345 */
aedf3497
JS		 2346static void
2347fc_flush_work(struct Scsi_Host *shost)
2348{
2349 if (!fc_host_work_q(shost)) {
2350 printk(KERN_ERR
2351 "ERROR: FC host '%s' attempted to flush work, "
2352 "when no workqueue created.\n", shost->hostt->name);
2353 dump_stack();
2354 return;
2355 }
2356
2357 flush_workqueue(fc_host_work_q(shost));
2358}
2359
2360/**
2361 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2362 * @shost: Pointer to Scsi_Host bound to fc_host.
2363 * @work: Work to queue for execution.
2364 * @delay: jiffies to delay the work queuing
2365 *
2366 * Return value:
0f29b966 2367 * 1 on success / 0 already queued / < 0 for error
eb44820c 2368 */
aedf3497 2369static int
c4028958 2370fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
aedf3497
JS		 2371 unsigned long delay)
2372{
2373 if (unlikely(!fc_host_devloss_work_q(shost))) {
2374 printk(KERN_ERR
2375 "ERROR: FC host '%s' attempted to queue work, "
2376 "when no workqueue created.\n", shost->hostt->name);
2377 dump_stack();
2378
2379 return -EINVAL;
2380 }
2381
2382 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2383}
2384
2385/**
2386 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2387 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2388 */
aedf3497
JS		 2389static void
2390fc_flush_devloss(struct Scsi_Host *shost)
2391{
2392 if (!fc_host_devloss_work_q(shost)) {
2393 printk(KERN_ERR
2394 "ERROR: FC host '%s' attempted to flush work, "
2395 "when no workqueue created.\n", shost->hostt->name);
2396 dump_stack();
2397 return;
2398 }
2399
2400 flush_workqueue(fc_host_devloss_work_q(shost));
2401}
2402
1da177e4
LT		 2403
2404/**
eb44820c
RL		 2405 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2406 * @shost: Which &Scsi_Host
1da177e4 2407 *
25985edc 2408 * This routine is expected to be called immediately preceding the
1da177e4
LT		 2409 * a driver's call to scsi_remove_host().
2410 *
2411 * WARNING: A driver utilizing the fc_transport, which fails to call
eb44820c 2412 * this routine prior to scsi_remove_host(), will leave dangling
1da177e4
LT		 2413 * objects in /sys/class/fc_remote_ports. Access to any of these
2414 * objects can result in a system crash !!!
2415 *
2416 * Notes:
2417 * This routine assumes no locks are held on entry.
eb44820c 2418 */
1da177e4
LT		 2419void
2420fc_remove_host(struct Scsi_Host *shost)
2421{
a53eb5e0
JS		 2422 struct fc_vport *vport = NULL, *next_vport = NULL;
2423 struct fc_rport *rport = NULL, *next_rport = NULL;
aedf3497
JS		 2424 struct workqueue_struct *work_q;
2425 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
a53eb5e0 2426 unsigned long flags;
a53eb5e0
JS		 2427
2428 spin_lock_irqsave(shost->host_lock, flags);
2429
2430 /* Remove any vports */
9ef3e4a4
JS		 2431 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2432 fc_queue_work(shost, &vport->vport_delete_work);
1da177e4
LT		 2433
2434 /* Remove any remote ports */
2435 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2436 &fc_host->rports, peers) {
2437 list_del(&rport->peers);
2438 rport->port_state = FC_PORTSTATE_DELETED;
2439 fc_queue_work(shost, &rport->rport_delete_work);
2440 }
2441
1da177e4 2442 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2443 &fc_host->rport_bindings, peers) {
2444 list_del(&rport->peers);
2445 rport->port_state = FC_PORTSTATE_DELETED;
2446 fc_queue_work(shost, &rport->rport_delete_work);
2447 }
2448
a53eb5e0
JS		 2449 spin_unlock_irqrestore(shost->host_lock, flags);
2450
aedf3497
JS		 2451 /* flush all scan work items */
2452 scsi_flush_work(shost);
2453
2454 /* flush all stgt delete, and rport delete work items, then kill it */
2455 if (fc_host->work_q) {
2456 work_q = fc_host->work_q;
2457 fc_host->work_q = NULL;
2458 destroy_workqueue(work_q);
2459 }
2460
2461 /* flush all devloss work items, then kill it */
2462 if (fc_host->devloss_work_q) {
2463 work_q = fc_host->devloss_work_q;
2464 fc_host->devloss_work_q = NULL;
2465 destroy_workqueue(work_q);
2466 }
1da177e4
LT		 2467}
2468EXPORT_SYMBOL(fc_remove_host);
2469
fff9d40c
MC		 2470static void fc_terminate_rport_io(struct fc_rport *rport)
2471{
2472 struct Scsi_Host *shost = rport_to_shost(rport);
2473 struct fc_internal *i = to_fc_internal(shost->transportt);
2474
2475 /* Involve the LLDD if possible to terminate all io on the rport. */
2476 if (i->f->terminate_rport_io)
2477 i->f->terminate_rport_io(rport);
2478
2479 /*
2480 * must unblock to flush queued IO. The caller will have set
2481 * the port_state or flags, so that fc_remote_port_chkready will
2482 * fail IO.
2483 */
2484 scsi_target_unblock(&rport->dev);
2485}
aedf3497
JS		 2486
2487/**
25985edc 2488 * fc_starget_delete - called to delete the scsi descendants of an rport
c4028958 2489 * @work: remote port to be operated on.
eb44820c
RL		 2490 *
2491 * Deletes target and all sdevs.
2492 */
19a7b4ae 2493static void
c4028958 2494fc_starget_delete(struct work_struct *work)
19a7b4ae 2495{
c4028958
DH		 2496 struct fc_rport *rport =
2497 container_of(work, struct fc_rport, stgt_delete_work);
19a7b4ae 2498
fff9d40c 2499 fc_terminate_rport_io(rport);
19a7b4ae
JSEC		 2500 scsi_remove_target(&rport->dev);
2501}
2502
aedf3497
JS		 2503
2504/**
2505 * fc_rport_final_delete - finish rport termination and delete it.
c4028958 2506 * @work: remote port to be deleted.
eb44820c 2507 */
aedf3497 2508static void
c4028958 2509fc_rport_final_delete(struct work_struct *work)
aedf3497 2510{
c4028958
DH		 2511 struct fc_rport *rport =
2512 container_of(work, struct fc_rport, rport_delete_work);
aedf3497
JS		 2513 struct device *dev = &rport->dev;
2514 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2515 struct fc_internal *i = to_fc_internal(shost->transportt);
92740b24 2516 unsigned long flags;
8798a694 2517 int do_callback = 0;
aedf3497 2518
112f661d
NNS		 2519 fc_terminate_rport_io(rport);
2520
aedf3497 2521 /*
9ef3e4a4 2522 * if a scan is pending, flush the SCSI Host work_q so that
aedf3497
JS		 2523 * that we can reclaim the rport scan work element.
2524 */
2525 if (rport->flags & FC_RPORT_SCAN_PENDING)
2526 scsi_flush_work(shost);
2527
92740b24
JS		 2528 /*
2529 * Cancel any outstanding timers. These should really exist
2530 * only when rmmod'ing the LLDD and we're asking for
2531 * immediate termination of the rports
2532 */
2533 spin_lock_irqsave(shost->host_lock, flags);
2534 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2535 spin_unlock_irqrestore(shost->host_lock, flags);
2536 if (!cancel_delayed_work(&rport->fail_io_work))
2537 fc_flush_devloss(shost);
2538 if (!cancel_delayed_work(&rport->dev_loss_work))
2539 fc_flush_devloss(shost);
2540 spin_lock_irqsave(shost->host_lock, flags);
2541 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2542 }
2543 spin_unlock_irqrestore(shost->host_lock, flags);
2544
0f29b966
JS		 2545 /* Delete SCSI target and sdevs */
2546 if (rport->scsi_target_id != -1)
c4028958 2547 fc_starget_delete(&rport->stgt_delete_work);
92740b24
JS		 2548
2549 /*
2550 * Notify the driver that the rport is now dead. The LLDD will
2551 * also guarantee that any communication to the rport is terminated
4be98c0c
JS		 2552 *
2553 * Avoid this call if we already called it when we preserved the
2554 * rport for the binding.
92740b24 2555 */
8798a694 2556 spin_lock_irqsave(shost->host_lock, flags);
4be98c0c 2557 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
8798a694
MR		 2558 (i->f->dev_loss_tmo_callbk)) {
2559 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2560 do_callback = 1;
2561 }
2562 spin_unlock_irqrestore(shost->host_lock, flags);
2563
2564 if (do_callback)
0f29b966 2565 i->f->dev_loss_tmo_callbk(rport);
0f29b966 2566
9e4f5e29
JS		 2567 fc_bsg_remove(rport->rqst_q);
2568
aedf3497
JS		 2569 transport_remove_device(dev);
2570 device_del(dev);
2571 transport_destroy_device(dev);
3bdad7bd
JS		 2572 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2573 put_device(dev); /* for self-reference */
aedf3497
JS		 2574}
2575
2576
1da177e4
LT		 2577/**
2578 * fc_rport_create - allocates and creates a remote FC port.
2579 * @shost: scsi host the remote port is connected to.
2580 * @channel: Channel on shost port connected to.
2581 * @ids: The world wide names, fc address, and FC4 port
2582 * roles for the remote port.
2583 *
2584 * Allocates and creates the remoter port structure, including the
2585 * class and sysfs creation.
2586 *
2587 * Notes:
2588 * This routine assumes no locks are held on entry.
eb44820c 2589 */
44818efb 2590static struct fc_rport *
1da177e4
LT		 2591fc_rport_create(struct Scsi_Host *shost, int channel,
2592 struct fc_rport_identifiers *ids)
2593{
aedf3497 2594 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2595 struct fc_internal *fci = to_fc_internal(shost->transportt);
2596 struct fc_rport *rport;
2597 struct device *dev;
2598 unsigned long flags;
2599 int error;
2600 size_t size;
2601
2602 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
24669f75 2603 rport = kzalloc(size, GFP_KERNEL);
1da177e4 2604 if (unlikely(!rport)) {
cadbd4a5 2605 printk(KERN_ERR "%s: allocation failure\n", __func__);
1da177e4
LT		 2606 return NULL;
2607 }
1da177e4
LT		 2608
2609 rport->maxframe_size = -1;
2610 rport->supported_classes = FC_COS_UNSPECIFIED;
43ca910a 2611 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
1da177e4
LT		 2612 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2613 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2614 rport->port_id = ids->port_id;
2615 rport->roles = ids->roles;
2616 rport->port_state = FC_PORTSTATE_ONLINE;
2617 if (fci->f->dd_fcrport_size)
2618 rport->dd_data = &rport[1];
2619 rport->channel = channel;
0f29b966 2620 rport->fast_io_fail_tmo = -1;
1da177e4 2621
c4028958
DH		 2622 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2623 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2624 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2625 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2626 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
1da177e4
LT		 2627
2628 spin_lock_irqsave(shost->host_lock, flags);
2629
2630 rport->number = fc_host->next_rport_number++;
a53eb5e0 2631 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
1da177e4
LT		 2632 rport->scsi_target_id = fc_host->next_target_id++;
2633 else
2634 rport->scsi_target_id = -1;
aedf3497 2635 list_add_tail(&rport->peers, &fc_host->rports);
3bdad7bd 2636 get_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 2637
2638 spin_unlock_irqrestore(shost->host_lock, flags);
2639
2640 dev = &rport->dev;
3bdad7bd
JS		 2641 device_initialize(dev); /* takes self reference */
2642 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
1da177e4 2643 dev->release = fc_rport_dev_release;
71610f55
KS		 2644 dev_set_name(dev, "rport-%d:%d-%d",
2645 shost->host_no, channel, rport->number);
1da177e4
LT		 2646 transport_setup_device(dev);
2647
2648 error = device_add(dev);
2649 if (error) {
2650 printk(KERN_ERR "FC Remote Port device_add failed\n");
2651 goto delete_rport;
2652 }
2653 transport_add_device(dev);
2654 transport_configure_device(dev);
2655
9e4f5e29
JS		 2656 fc_bsg_rportadd(shost, rport);
2657 /* ignore any bsg add error - we just can't do sgio */
2658
a53eb5e0 2659 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
1da177e4 2660 /* initiate a scan of the target */
aedf3497 2661 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2662 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2663 }
1da177e4
LT		 2664
2665 return rport;
2666
2667delete_rport:
2668 transport_destroy_device(dev);
1da177e4
LT		 2669 spin_lock_irqsave(shost->host_lock, flags);
2670 list_del(&rport->peers);
3bdad7bd 2671 put_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 2672 spin_unlock_irqrestore(shost->host_lock, flags);
2673 put_device(dev->parent);
2674 kfree(rport);
2675 return NULL;
2676}
2677
2678/**
eb44820c 2679 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
1da177e4
LT		 2680 * @shost: scsi host the remote port is connected to.
2681 * @channel: Channel on shost port connected to.
2682 * @ids: The world wide names, fc address, and FC4 port
2683 * roles for the remote port.
2684 *
2685 * The LLDD calls this routine to notify the transport of the existence
2686 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2687 * of the port, it's FC address (port_id), and the FC4 roles that are
2688 * active for the port.
2689 *
2690 * For ports that are FCP targets (aka scsi targets), the FC transport
2691 * maintains consistent target id bindings on behalf of the LLDD.
2692 * A consistent target id binding is an assignment of a target id to
2693 * a remote port identifier, which persists while the scsi host is
2694 * attached. The remote port can disappear, then later reappear, and
2695 * it's target id assignment remains the same. This allows for shifts
2696 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2697 * changes to the scsi subsystem which is based on scsi host number and
2698 * target id values. Bindings are only valid during the attachment of
2699 * the scsi host. If the host detaches, then later re-attaches, target
2700 * id bindings may change.
2701 *
2702 * This routine is responsible for returning a remote port structure.
2703 * The routine will search the list of remote ports it maintains
2704 * internally on behalf of consistent target id mappings. If found, the
2705 * remote port structure will be reused. Otherwise, a new remote port
2706 * structure will be allocated.
2707 *
2708 * Whenever a remote port is allocated, a new fc_remote_port class
2709 * device is created.
2710 *
2711 * Should not be called from interrupt context.
2712 *
2713 * Notes:
2714 * This routine assumes no locks are held on entry.
eb44820c 2715 */
1da177e4
LT		 2716struct fc_rport *
2717fc_remote_port_add(struct Scsi_Host *shost, int channel,
2718 struct fc_rport_identifiers *ids)
2719{
19a7b4ae 2720 struct fc_internal *fci = to_fc_internal(shost->transportt);
aedf3497 2721 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2722 struct fc_rport *rport;
2723 unsigned long flags;
2724 int match = 0;
2725
aedf3497
JS		 2726 /* ensure any stgt delete functions are done */
2727 fc_flush_work(shost);
2728
19a7b4ae
JSEC		 2729 /*
2730 * Search the list of "active" rports, for an rport that has been
2731 * deleted, but we've held off the real delete while the target
2732 * is in a "blocked" state.
2733 */
2734 spin_lock_irqsave(shost->host_lock, flags);
2735
aedf3497 2736 list_for_each_entry(rport, &fc_host->rports, peers) {
19a7b4ae
JSEC		 2737
2738 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2739 (rport->channel == channel)) {
2740
aedf3497 2741 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 2742 case FC_TGTID_BIND_BY_WWPN:
2743 case FC_TGTID_BIND_NONE:
2744 if (rport->port_name == ids->port_name)
2745 match = 1;
2746 break;
2747 case FC_TGTID_BIND_BY_WWNN:
2748 if (rport->node_name == ids->node_name)
2749 match = 1;
2750 break;
2751 case FC_TGTID_BIND_BY_ID:
2752 if (rport->port_id == ids->port_id)
2753 match = 1;
2754 break;
2755 }
2756
2757 if (match) {
19a7b4ae
JSEC		 2758
2759 memcpy(&rport->node_name, &ids->node_name,
2760 sizeof(rport->node_name));
2761 memcpy(&rport->port_name, &ids->port_name,
2762 sizeof(rport->port_name));
2763 rport->port_id = ids->port_id;
2764
2765 rport->port_state = FC_PORTSTATE_ONLINE;
2766 rport->roles = ids->roles;
2767
2768 spin_unlock_irqrestore(shost->host_lock, flags);
2769
2770 if (fci->f->dd_fcrport_size)
2771 memset(rport->dd_data, 0,
2772 fci->f->dd_fcrport_size);
2773
2774 /*
92740b24
JS		 2775 * If we were not a target, cancel the
2776 * io terminate and rport timers, and
2777 * we're done.
2778 *
2779 * If we were a target, but our new role
2780 * doesn't indicate a target, leave the
2781 * timers running expecting the role to
2782 * change as the target fully logs in. If
2783 * it doesn't, the target will be torn down.
2784 *
2785 * If we were a target, and our role shows
2786 * we're still a target, cancel the timers
2787 * and kick off a scan.
19a7b4ae 2788 */
19a7b4ae 2789
92740b24
JS		 2790 /* was a target, not in roles */
2791 if ((rport->scsi_target_id != -1) &&
a53eb5e0 2792 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
92740b24 2793 return rport;
19a7b4ae
JSEC		 2794
2795 /*
92740b24
JS		 2796 * Stop the fail io and dev_loss timers.
2797 * If they flush, the port_state will
2798 * be checked and will NOOP the function.
19a7b4ae 2799 */
0f29b966
JS		 2800 if (!cancel_delayed_work(&rport->fail_io_work))
2801 fc_flush_devloss(shost);
92740b24 2802 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2803 fc_flush_devloss(shost);
2804
2805 spin_lock_irqsave(shost->host_lock, flags);
2806
fff9d40c 2807 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
4be98c0c
JS		 2808 FC_RPORT_DEVLOSS_PENDING |
2809 FC_RPORT_DEVLOSS_CALLBK_DONE);
19a7b4ae 2810
8fb2ef89
MC		 2811 spin_unlock_irqrestore(shost->host_lock, flags);
2812
92740b24
JS		 2813 /* if target, initiate a scan */
2814 if (rport->scsi_target_id != -1) {
8fb2ef89
MC		 2815 scsi_target_unblock(&rport->dev);
2816
2817 spin_lock_irqsave(shost->host_lock,
2818 flags);
92740b24
JS		 2819 rport->flags |= FC_RPORT_SCAN_PENDING;
2820 scsi_queue_work(shost,
2821 &rport->scan_work);
2822 spin_unlock_irqrestore(shost->host_lock,
2823 flags);
8fb2ef89 2824 }
a0785edf 2825
9e4f5e29
JS		 2826 fc_bsg_goose_queue(rport);
2827
19a7b4ae
JSEC		 2828 return rport;
2829 }
2830 }
2831 }
2832
92740b24
JS		 2833 /*
2834 * Search the bindings array
2835 * Note: if never a FCP target, you won't be on this list
2836 */
aedf3497 2837 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
1da177e4
LT		 2838
2839 /* search for a matching consistent binding */
2840
aedf3497 2841 list_for_each_entry(rport, &fc_host->rport_bindings,
1da177e4
LT		 2842 peers) {
2843 if (rport->channel != channel)
2844 continue;
2845
aedf3497 2846 switch (fc_host->tgtid_bind_type) {
1da177e4
LT		 2847 case FC_TGTID_BIND_BY_WWPN:
2848 if (rport->port_name == ids->port_name)
2849 match = 1;
2850 break;
2851 case FC_TGTID_BIND_BY_WWNN:
2852 if (rport->node_name == ids->node_name)
2853 match = 1;
2854 break;
2855 case FC_TGTID_BIND_BY_ID:
2856 if (rport->port_id == ids->port_id)
2857 match = 1;
2858 break;
2859 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2860 break;
2861 }
2862
2863 if (match) {
aedf3497 2864 list_move_tail(&rport->peers, &fc_host->rports);
1da177e4
LT		 2865 break;
2866 }
2867 }
2868
1da177e4
LT		 2869 if (match) {
2870 memcpy(&rport->node_name, &ids->node_name,
2871 sizeof(rport->node_name));
2872 memcpy(&rport->port_name, &ids->port_name,
2873 sizeof(rport->port_name));
2874 rport->port_id = ids->port_id;
2875 rport->roles = ids->roles;
2876 rport->port_state = FC_PORTSTATE_ONLINE;
fff9d40c 2877 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 2878
19a7b4ae
JSEC		 2879 if (fci->f->dd_fcrport_size)
2880 memset(rport->dd_data, 0,
2881 fci->f->dd_fcrport_size);
8fb2ef89
MC		 2882 spin_unlock_irqrestore(shost->host_lock, flags);
2883
2884 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
2885 scsi_target_unblock(&rport->dev);
19a7b4ae 2886
1da177e4 2887 /* initiate a scan of the target */
8fb2ef89 2888 spin_lock_irqsave(shost->host_lock, flags);
aedf3497 2889 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2890 scsi_queue_work(shost, &rport->scan_work);
a0785edf 2891 spin_unlock_irqrestore(shost->host_lock, flags);
8fb2ef89 2892 }
1da177e4
LT		 2893 return rport;
2894 }
2895 }
2896
19a7b4ae
JSEC		 2897 spin_unlock_irqrestore(shost->host_lock, flags);
2898
1da177e4
LT		 2899 /* No consistent binding found - create new remote port entry */
2900 rport = fc_rport_create(shost, channel, ids);
2901
2902 return rport;
2903}
2904EXPORT_SYMBOL(fc_remote_port_add);
2905
1da177e4
LT		 2906
2907/**
eb44820c 2908 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
1da177e4
LT		 2909 * @rport: The remote port that no longer exists
2910 *
2911 * The LLDD calls this routine to notify the transport that a remote
2912 * port is no longer part of the topology. Note: Although a port
2913 * may no longer be part of the topology, it may persist in the remote
19a7b4ae 2914 * ports displayed by the fc_host. We do this under 2 conditions:
eb44820c 2915 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
19a7b4ae
JSEC		 2916 * This allows the port to temporarily disappear, then reappear without
2917 * disrupting the SCSI device tree attached to it. During the "blocked"
2918 * period the port will still exist.
eb44820c 2919 * 2) If the port was a scsi target and disappears for longer than we
19a7b4ae
JSEC		 2920 * expect, we'll delete the port and the tear down the SCSI device tree
2921 * attached to it. However, we want to semi-persist the target id assigned
2922 * to that port if it eventually does exist. The port structure will
2923 * remain (although with minimal information) so that the target id
2924 * bindings remails.
1da177e4
LT		 2925 *
2926 * If the remote port is not an FCP Target, it will be fully torn down
2927 * and deallocated, including the fc_remote_port class device.
2928 *
19a7b4ae
JSEC		 2929 * If the remote port is an FCP Target, the port will be placed in a
2930 * temporary blocked state. From the LLDD's perspective, the rport no
2931 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2932 * exists, but all sdevs on it are blocked from further I/O. The following
eb44820c
RL		 2933 * is then expected.
2934 *
19a7b4ae
JSEC		 2935 * If the remote port does not return (signaled by a LLDD call to
2936 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2937 * scsi target is removed - killing all outstanding i/o and removing the
2938 * scsi devices attached ot it. The port structure will be marked Not
2939 * Present and be partially cleared, leaving only enough information to
2940 * recognize the remote port relative to the scsi target id binding if
2941 * it later appears. The port will remain as long as there is a valid
2942 * binding (e.g. until the user changes the binding type or unloads the
2943 * scsi host with the binding).
1da177e4 2944 *
19a7b4ae
JSEC		 2945 * If the remote port returns within the dev_loss_tmo value (and matches
2946 * according to the target id binding type), the port structure will be
2947 * reused. If it is no longer a SCSI target, the target will be torn
2948 * down. If it continues to be a SCSI target, then the target will be
2949 * unblocked (allowing i/o to be resumed), and a scan will be activated
2950 * to ensure that all luns are detected.
2951 *
2952 * Called from normal process context only - cannot be called from interrupt.
1da177e4
LT		 2953 *
2954 * Notes:
2955 * This routine assumes no locks are held on entry.
eb44820c 2956 */
1da177e4
LT		 2957void
2958fc_remote_port_delete(struct fc_rport *rport)
2959{
aedf3497 2960 struct Scsi_Host *shost = rport_to_shost(rport);
36dd288f 2961 unsigned long timeout = rport->dev_loss_tmo;
aedf3497
JS		 2962 unsigned long flags;
2963
2964 /*
2965 * No need to flush the fc_host work_q's, as all adds are synchronous.
2966 *
2967 * We do need to reclaim the rport scan work element, so eventually
2968 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2969 * there's still a scan pending.
2970 */
2971
2972 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2973
92740b24 2974 if (rport->port_state != FC_PORTSTATE_ONLINE) {
aedf3497 2975 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2976 return;
2977 }
2978
92740b24
JS		 2979 /*
2980 * In the past, we if this was not an FCP-Target, we would
2981 * unconditionally just jump to deleting the rport.
2982 * However, rports can be used as node containers by the LLDD,
2983 * and its not appropriate to just terminate the rport at the
2984 * first sign of a loss in connectivity. The LLDD may want to
2985 * send ELS traffic to re-validate the login. If the rport is
2986 * immediately deleted, it makes it inappropriate for a node
2987 * container.
2988 * So... we now unconditionally wait dev_loss_tmo before
2989 * destroying an rport.
2990 */
2991
aedf3497
JS		 2992 rport->port_state = FC_PORTSTATE_BLOCKED;
2993
2994 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2995
2996 spin_unlock_irqrestore(shost->host_lock, flags);
2997
7525236d
FT		 2998 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
2999 shost->active_mode & MODE_TARGET)
3000 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
3001
19a7b4ae 3002 scsi_target_block(&rport->dev);
1da177e4 3003
0f29b966
JS		 3004 /* see if we need to kill io faster than waiting for device loss */
3005 if ((rport->fast_io_fail_tmo != -1) &&
fff9d40c 3006 (rport->fast_io_fail_tmo < timeout))
0f29b966
JS		 3007 fc_queue_devloss_work(shost, &rport->fail_io_work,
3008 rport->fast_io_fail_tmo * HZ);
3009
19a7b4ae 3010 /* cap the length the devices can be blocked until they are deleted */
aedf3497 3011 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
1da177e4
LT		 3012}
3013EXPORT_SYMBOL(fc_remote_port_delete);
3014
3015/**
eb44820c 3016 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
1da177e4 3017 * @rport: The remote port that changed.
eb44820c 3018 * @roles: New roles for this port.
1da177e4 3019 *
eb44820c
RL		 3020 * Description: The LLDD calls this routine to notify the transport that the
3021 * roles on a remote port may have changed. The largest effect of this is
1da177e4
LT		 3022 * if a port now becomes a FCP Target, it must be allocated a
3023 * scsi target id. If the port is no longer a FCP target, any
3024 * scsi target id value assigned to it will persist in case the
3025 * role changes back to include FCP Target. No changes in the scsi
3026 * midlayer will be invoked if the role changes (in the expectation
3027 * that the role will be resumed. If it doesn't normal error processing
3028 * will take place).
3029 *
3030 * Should not be called from interrupt context.
3031 *
3032 * Notes:
3033 * This routine assumes no locks are held on entry.
eb44820c 3034 */
1da177e4
LT		 3035void
3036fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3037{
3038 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 3039 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 3040 unsigned long flags;
3041 int create = 0;
7525236d 3042 int ret;
1da177e4 3043
1da177e4 3044 spin_lock_irqsave(shost->host_lock, flags);
a53eb5e0 3045 if (roles & FC_PORT_ROLE_FCP_TARGET) {
19a7b4ae
JSEC		 3046 if (rport->scsi_target_id == -1) {
3047 rport->scsi_target_id = fc_host->next_target_id++;
3048 create = 1;
a53eb5e0 3049 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
19a7b4ae 3050 create = 1;
7525236d
FT		 3051 } else if (shost->active_mode & MODE_TARGET) {
3052 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
3053 (char *)&rport->node_name);
3054 if (ret)
3055 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
3056 ret);
1da177e4 3057 }
1da177e4 3058
19a7b4ae
JSEC		 3059 rport->roles = roles;
3060
aedf3497
JS		 3061 spin_unlock_irqrestore(shost->host_lock, flags);
3062
19a7b4ae
JSEC		 3063 if (create) {
3064 /*
3065 * There may have been a delete timer running on the
3066 * port. Ensure that it is cancelled as we now know
3067 * the port is an FCP Target.
3068 * Note: we know the rport is exists and in an online
3069 * state as the LLDD would not have had an rport
3070 * reference to pass us.
3071 *
3072 * Take no action on the del_timer failure as the state
3073 * machine state change will validate the
3074 * transaction.
3075 */
0f29b966
JS		 3076 if (!cancel_delayed_work(&rport->fail_io_work))
3077 fc_flush_devloss(shost);
19a7b4ae 3078 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 3079 fc_flush_devloss(shost);
3080
3081 spin_lock_irqsave(shost->host_lock, flags);
fff9d40c 3082 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
0eecee41
JS		 3083 FC_RPORT_DEVLOSS_PENDING |
3084 FC_RPORT_DEVLOSS_CALLBK_DONE);
aedf3497
JS		 3085 spin_unlock_irqrestore(shost->host_lock, flags);
3086
3087 /* ensure any stgt delete functions are done */
3088 fc_flush_work(shost);
19a7b4ae 3089
8fb2ef89 3090 scsi_target_unblock(&rport->dev);
1da177e4 3091 /* initiate a scan of the target */
aedf3497
JS		 3092 spin_lock_irqsave(shost->host_lock, flags);
3093 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 3094 scsi_queue_work(shost, &rport->scan_work);
aedf3497 3095 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae 3096 }
1da177e4
LT		 3097}
3098EXPORT_SYMBOL(fc_remote_port_rolechg);
3099
3100/**
eb44820c 3101 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
92740b24 3102 * @work: rport target that failed to reappear in the allotted time.
eb44820c
RL		 3103 *
3104 * Description: An attempt to delete a remote port blocks, and if it fails
3105 * to return in the allotted time this gets called.
3106 */
1da177e4 3107static void
c4028958 3108fc_timeout_deleted_rport(struct work_struct *work)
1da177e4 3109{
c4028958
DH		 3110 struct fc_rport *rport =
3111 container_of(work, struct fc_rport, dev_loss_work.work);
19a7b4ae 3112 struct Scsi_Host *shost = rport_to_shost(rport);
4be98c0c 3113 struct fc_internal *i = to_fc_internal(shost->transportt);
aedf3497 3114 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
19a7b4ae 3115 unsigned long flags;
8798a694 3116 int do_callback = 0;
1da177e4 3117
19a7b4ae 3118 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 3119
aedf3497
JS		 3120 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3121
1da177e4 3122 /*
92740b24
JS		 3123 * If the port is ONLINE, then it came back. If it was a SCSI
3124 * target, validate it still is. If not, tear down the
3125 * scsi_target on it.
1da177e4 3126 */
aedf3497 3127 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
92740b24 3128 (rport->scsi_target_id != -1) &&
a53eb5e0 3129 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
19a7b4ae 3130 dev_printk(KERN_ERR, &rport->dev,
aedf3497
JS		 3131 "blocked FC remote port time out: no longer"
3132 " a FCP target, removing starget\n");
aedf3497 3133 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf
JS		 3134 scsi_target_unblock(&rport->dev);
3135 fc_queue_work(shost, &rport->stgt_delete_work);
19a7b4ae
JSEC		 3136 return;
3137 }
1da177e4 3138
92740b24 3139 /* NOOP state - we're flushing workq's */
19a7b4ae
JSEC		 3140 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3141 spin_unlock_irqrestore(shost->host_lock, flags);
3142 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3143 "blocked FC remote port time out: leaving"
3144 " rport%s alone\n",
3145 (rport->scsi_target_id != -1) ? " and starget" : "");
19a7b4ae
JSEC		 3146 return;
3147 }
1da177e4 3148
92740b24
JS		 3149 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3150 (rport->scsi_target_id == -1)) {
aedf3497
JS		 3151 list_del(&rport->peers);
3152 rport->port_state = FC_PORTSTATE_DELETED;
19a7b4ae 3153 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3154 "blocked FC remote port time out: removing"
3155 " rport%s\n",
3156 (rport->scsi_target_id != -1) ? " and starget" : "");
aedf3497
JS		 3157 fc_queue_work(shost, &rport->rport_delete_work);
3158 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC		 3159 return;
3160 }
1da177e4 3161
19a7b4ae
JSEC		 3162 dev_printk(KERN_ERR, &rport->dev,
3163 "blocked FC remote port time out: removing target and "
3164 "saving binding\n");
3165
aedf3497 3166 list_move_tail(&rport->peers, &fc_host->rport_bindings);
1da177e4
LT		 3167
3168 /*
19a7b4ae
JSEC		 3169 * Note: We do not remove or clear the hostdata area. This allows
3170 * host-specific target data to persist along with the
3171 * scsi_target_id. It's up to the host to manage it's hostdata area.
1da177e4 3172 */
1da177e4 3173
19a7b4ae
JSEC		 3174 /*
3175 * Reinitialize port attributes that may change if the port comes back.
3176 */
3177 rport->maxframe_size = -1;
3178 rport->supported_classes = FC_COS_UNSPECIFIED;
a53eb5e0 3179 rport->roles = FC_PORT_ROLE_UNKNOWN;
aedf3497 3180 rport->port_state = FC_PORTSTATE_NOTPRESENT;
fff9d40c 3181 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 3182
f78badb1
JS		 3183 /*
3184 * Pre-emptively kill I/O rather than waiting for the work queue
3185 * item to teardown the starget. (FCOE libFC folks prefer this
3186 * and to have the rport_port_id still set when it's done).
3187 */
3188 spin_unlock_irqrestore(shost->host_lock, flags);
3189 fc_terminate_rport_io(rport);
3190
8798a694
MR		 3191 spin_lock_irqsave(shost->host_lock, flags);
3192
3193 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
f78badb1 3194
8798a694
MR		 3195 /* remove the identifiers that aren't used in the consisting binding */
3196 switch (fc_host->tgtid_bind_type) {
3197 case FC_TGTID_BIND_BY_WWPN:
3198 rport->node_name = -1;
3199 rport->port_id = -1;
3200 break;
3201 case FC_TGTID_BIND_BY_WWNN:
3202 rport->port_name = -1;
3203 rport->port_id = -1;
3204 break;
3205 case FC_TGTID_BIND_BY_ID:
3206 rport->node_name = -1;
3207 rport->port_name = -1;
3208 break;
3209 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3210 break;
3211 }
3212
3213 /*
3214 * As this only occurs if the remote port (scsi target)
3215 * went away and didn't come back - we'll remove
3216 * all attached scsi devices.
3217 */
3218 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3219 fc_queue_work(shost, &rport->stgt_delete_work);
3220
3221 do_callback = 1;
19a7b4ae
JSEC		 3222 }
3223
8798a694 3224 spin_unlock_irqrestore(shost->host_lock, flags);
4be98c0c
JS		 3225
3226 /*
3227 * Notify the driver that the rport is now dead. The LLDD will
3228 * also guarantee that any communication to the rport is terminated
3229 *
3230 * Note: we set the CALLBK_DONE flag above to correspond
3231 */
8798a694 3232 if (do_callback && i->f->dev_loss_tmo_callbk)
4be98c0c 3233 i->f->dev_loss_tmo_callbk(rport);
1da177e4 3234}
1da177e4 3235
4be98c0c 3236
0f29b966 3237/**
eb44820c 3238 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
c4028958 3239 * @work: rport to terminate io on.
0f29b966
JS		 3240 *
3241 * Notes: Only requests the failure of the io, not that all are flushed
3242 * prior to returning.
eb44820c 3243 */
0f29b966 3244static void
c4028958 3245fc_timeout_fail_rport_io(struct work_struct *work)
0f29b966 3246{
c4028958
DH		 3247 struct fc_rport *rport =
3248 container_of(work, struct fc_rport, fail_io_work.work);
0f29b966
JS		 3249
3250 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3251 return;
3252
fff9d40c
MC		 3253 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3254 fc_terminate_rport_io(rport);
0f29b966
JS		 3255}
3256
1da177e4
LT		 3257/**
3258 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
c4028958 3259 * @work: remote port to be scanned.
eb44820c 3260 */
1da177e4 3261static void
c4028958 3262fc_scsi_scan_rport(struct work_struct *work)
1da177e4 3263{
c4028958
DH		 3264 struct fc_rport *rport =
3265 container_of(work, struct fc_rport, scan_work);
aedf3497 3266 struct Scsi_Host *shost = rport_to_shost(rport);
03f002f7 3267 struct fc_internal *i = to_fc_internal(shost->transportt);
42e33148
JSEC		 3268 unsigned long flags;
3269
aedf3497 3270 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
03f002f7
CS		 3271 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3272 !(i->f->disable_target_scan)) {
aedf3497
JS		 3273 scsi_scan_target(&rport->dev, rport->channel,
3274 rport->scsi_target_id, SCAN_WILD_CARD, 1);
42e33148 3275 }
aedf3497
JS		 3276
3277 spin_lock_irqsave(shost->host_lock, flags);
3278 rport->flags &= ~FC_RPORT_SCAN_PENDING;
42e33148
JSEC		 3279 spin_unlock_irqrestore(shost->host_lock, flags);
3280}
3281
65d430fa
CS		 3282/**
3283 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3284 * @cmnd: SCSI command that scsi_eh is trying to recover
3285 *
3286 * This routine can be called from a FC LLD scsi_eh callback. It
3287 * blocks the scsi_eh thread until the fc_rport leaves the
2f2eb587
CS		 3288 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3289 * necessary to avoid the scsi_eh failing recovery actions for blocked
3290 * rports which would lead to offlined SCSI devices.
3291 *
3292 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3293 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3294 * passed back to scsi_eh.
65d430fa 3295 */
2f2eb587 3296int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
65d430fa
CS		 3297{
3298 struct Scsi_Host *shost = cmnd->device->host;
3299 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3300 unsigned long flags;
3301
3302 spin_lock_irqsave(shost->host_lock, flags);
2f2eb587
CS		 3303 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3304 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
65d430fa
CS		 3305 spin_unlock_irqrestore(shost->host_lock, flags);
3306 msleep(1000);
3307 spin_lock_irqsave(shost->host_lock, flags);
3308 }
3309 spin_unlock_irqrestore(shost->host_lock, flags);
2f2eb587
CS		 3310
3311 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3312 return FAST_IO_FAIL;
3313
3314 return 0;
65d430fa
CS		 3315}
3316EXPORT_SYMBOL(fc_block_scsi_eh);
42e33148 3317
a53eb5e0 3318/**
a30c3f69 3319 * fc_vport_setup - allocates and creates a FC virtual port.
a53eb5e0
JS		 3320 * @shost: scsi host the virtual port is connected to.
3321 * @channel: Channel on shost port connected to.
3322 * @pdev: parent device for vport
3323 * @ids: The world wide names, FC4 port roles, etc for
3324 * the virtual port.
3325 * @ret_vport: The pointer to the created vport.
3326 *
3327 * Allocates and creates the vport structure, calls the parent host
3328 * to instantiate the vport, the completes w/ class and sysfs creation.
3329 *
3330 * Notes:
3331 * This routine assumes no locks are held on entry.
eb44820c 3332 */
a53eb5e0 3333static int
a30c3f69 3334fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
a53eb5e0
JS		 3335 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3336{
3337 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3338 struct fc_internal *fci = to_fc_internal(shost->transportt);
3339 struct fc_vport *vport;
3340 struct device *dev;
3341 unsigned long flags;
3342 size_t size;
3343 int error;
3344
3345 *ret_vport = NULL;
3346
3347 if ( ! fci->f->vport_create)
3348 return -ENOENT;
3349
3350 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3351 vport = kzalloc(size, GFP_KERNEL);
3352 if (unlikely(!vport)) {
cadbd4a5 3353 printk(KERN_ERR "%s: allocation failure\n", __func__);
a53eb5e0
JS		 3354 return -ENOMEM;
3355 }
3356
3357 vport->vport_state = FC_VPORT_UNKNOWN;
3358 vport->vport_last_state = FC_VPORT_UNKNOWN;
3359 vport->node_name = ids->node_name;
3360 vport->port_name = ids->port_name;
3361 vport->roles = ids->roles;
3362 vport->vport_type = ids->vport_type;
3363 if (fci->f->dd_fcvport_size)
3364 vport->dd_data = &vport[1];
3365 vport->shost = shost;
3366 vport->channel = channel;
3367 vport->flags = FC_VPORT_CREATING;
9ef3e4a4 3368 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
a53eb5e0
JS		 3369
3370 spin_lock_irqsave(shost->host_lock, flags);
3371
3372 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3373 spin_unlock_irqrestore(shost->host_lock, flags);
3374 kfree(vport);
3375 return -ENOSPC;
3376 }
3377 fc_host->npiv_vports_inuse++;
3378 vport->number = fc_host->next_vport_number++;
3379 list_add_tail(&vport->peers, &fc_host->vports);
3380 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3381
3382 spin_unlock_irqrestore(shost->host_lock, flags);
3383
3384 dev = &vport->dev;
3385 device_initialize(dev); /* takes self reference */
3386 dev->parent = get_device(pdev); /* takes parent reference */
3387 dev->release = fc_vport_dev_release;
71610f55
KS		 3388 dev_set_name(dev, "vport-%d:%d-%d",
3389 shost->host_no, channel, vport->number);
a53eb5e0
JS		 3390 transport_setup_device(dev);
3391
3392 error = device_add(dev);
3393 if (error) {
3394 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3395 goto delete_vport;
3396 }
3397 transport_add_device(dev);
3398 transport_configure_device(dev);
3399
3400 error = fci->f->vport_create(vport, ids->disable);
3401 if (error) {
3402 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3403 goto delete_vport_all;
3404 }
3405
3406 /*
3407 * if the parent isn't the physical adapter's Scsi_Host, ensure
3408 * the Scsi_Host at least contains ia symlink to the vport.
3409 */
3410 if (pdev != &shost->shost_gendev) {
3411 error = sysfs_create_link(&shost->shost_gendev.kobj,
71610f55 3412 &dev->kobj, dev_name(dev));
a53eb5e0
JS		 3413 if (error)
3414 printk(KERN_ERR
3415 "%s: Cannot create vport symlinks for "
3416 "%s, err=%d\n",
71610f55 3417 __func__, dev_name(dev), error);
a53eb5e0
JS		 3418 }
3419 spin_lock_irqsave(shost->host_lock, flags);
3420 vport->flags &= ~FC_VPORT_CREATING;
3421 spin_unlock_irqrestore(shost->host_lock, flags);
3422
3423 dev_printk(KERN_NOTICE, pdev,
71610f55 3424 "%s created via shost%d channel %d\n", dev_name(dev),
a53eb5e0
JS		 3425 shost->host_no, channel);
3426
3427 *ret_vport = vport;
3428
3429 return 0;
3430
3431delete_vport_all:
3432 transport_remove_device(dev);
3433 device_del(dev);
3434delete_vport:
3435 transport_destroy_device(dev);
3436 spin_lock_irqsave(shost->host_lock, flags);
3437 list_del(&vport->peers);
3438 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3439 fc_host->npiv_vports_inuse--;
3440 spin_unlock_irqrestore(shost->host_lock, flags);
3441 put_device(dev->parent);
3442 kfree(vport);
3443
3444 return error;
3445}
3446
a30c3f69
AV		 3447/**
3448 * fc_vport_create - Admin App or LLDD requests creation of a vport
3449 * @shost: scsi host the virtual port is connected to.
3450 * @channel: channel on shost port connected to.
3451 * @ids: The world wide names, FC4 port roles, etc for
3452 * the virtual port.
3453 *
3454 * Notes:
3455 * This routine assumes no locks are held on entry.
3456 */
3457struct fc_vport *
3458fc_vport_create(struct Scsi_Host *shost, int channel,
3459 struct fc_vport_identifiers *ids)
3460{
3461 int stat;
3462 struct fc_vport *vport;
3463
3464 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3465 ids, &vport);
3466 return stat ? NULL : vport;
3467}
3468EXPORT_SYMBOL(fc_vport_create);
a53eb5e0
JS		 3469
3470/**
3471 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3472 * @vport: fc_vport to be terminated
3473 *
3474 * Calls the LLDD vport_delete() function, then deallocates and removes
3475 * the vport from the shost and object tree.
3476 *
3477 * Notes:
3478 * This routine assumes no locks are held on entry.
eb44820c 3479 */
a53eb5e0
JS		 3480int
3481fc_vport_terminate(struct fc_vport *vport)
3482{
3483 struct Scsi_Host *shost = vport_to_shost(vport);
3484 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3485 struct fc_internal *i = to_fc_internal(shost->transportt);
3486 struct device *dev = &vport->dev;
3487 unsigned long flags;
3488 int stat;
3489
a53eb5e0
JS		 3490 if (i->f->vport_delete)
3491 stat = i->f->vport_delete(vport);
3492 else
3493 stat = -ENOENT;
3494
3495 spin_lock_irqsave(shost->host_lock, flags);
3496 vport->flags &= ~FC_VPORT_DELETING;
3497 if (!stat) {
3498 vport->flags |= FC_VPORT_DELETED;
3499 list_del(&vport->peers);
3500 fc_host->npiv_vports_inuse--;
3501 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3502 }
3503 spin_unlock_irqrestore(shost->host_lock, flags);
3504
3505 if (stat)
3506 return stat;
3507
3508 if (dev->parent != &shost->shost_gendev)
71610f55 3509 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
a53eb5e0
JS		 3510 transport_remove_device(dev);
3511 device_del(dev);
3512 transport_destroy_device(dev);
3513
3514 /*
3515 * Removing our self-reference should mean our
3516 * release function gets called, which will drop the remaining
3517 * parent reference and free the data structure.
3518 */
3519 put_device(dev); /* for self-reference */
3520
3521 return 0; /* SUCCESS */
3522}
3523EXPORT_SYMBOL(fc_vport_terminate);
3524
9ef3e4a4
JS		 3525/**
3526 * fc_vport_sched_delete - workq-based delete request for a vport
9ef3e4a4 3527 * @work: vport to be deleted.
eb44820c 3528 */
9ef3e4a4
JS		 3529static void
3530fc_vport_sched_delete(struct work_struct *work)
3531{
3532 struct fc_vport *vport =
3533 container_of(work, struct fc_vport, vport_delete_work);
3534 int stat;
3535
3536 stat = fc_vport_terminate(vport);
3537 if (stat)
3538 dev_printk(KERN_ERR, vport->dev.parent,
3539 "%s: %s could not be deleted created via "
cadbd4a5 3540 "shost%d channel %d - error %d\n", __func__,
71610f55 3541 dev_name(&vport->dev), vport->shost->host_no,
9ef3e4a4
JS		 3542 vport->channel, stat);
3543}
3544
a53eb5e0 3545
9e4f5e29
JS		 3546/*
3547 * BSG support
3548 */
3549
3550
3551/**
3552 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3553 * @job: fc_bsg_job that is to be torn down
3554 */
3555static void
3556fc_destroy_bsgjob(struct fc_bsg_job *job)
3557{
3558 unsigned long flags;
3559
3560 spin_lock_irqsave(&job->job_lock, flags);
3561 if (job->ref_cnt) {
3562 spin_unlock_irqrestore(&job->job_lock, flags);
3563 return;
3564 }
3565 spin_unlock_irqrestore(&job->job_lock, flags);
3566
3567 put_device(job->dev); /* release reference for the request */
3568
3569 kfree(job->request_payload.sg_list);
3570 kfree(job->reply_payload.sg_list);
3571 kfree(job);
3572}
3573
9e4f5e29
JS		 3574/**
3575 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3576 * completed
3577 * @job: fc_bsg_job that is complete
3578 */
3579static void
3580fc_bsg_jobdone(struct fc_bsg_job *job)
3581{
3582 struct request *req = job->req;
3583 struct request *rsp = req->next_rq;
9e4f5e29
JS		 3584 int err;
3585
9e4f5e29 3586 err = job->req->errors = job->reply->result;
b5c6f776 3587
9e4f5e29
JS		 3588 if (err < 0)
3589 /* we're only returning the result field in the reply */
3590 job->req->sense_len = sizeof(uint32_t);
3591 else
3592 job->req->sense_len = job->reply_len;
3593
3594 /* we assume all request payload was transferred, residual == 0 */
3595 req->resid_len = 0;
3596
3597 if (rsp) {
3598 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3599
3600 /* set reply (bidi) residual */
3601 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3602 rsp->resid_len);
3603 }
b5c6f776
GM		 3604 blk_complete_request(req);
3605}
3606
3607/**
3608 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
fe5d20c8 3609 * @rq: BSG request that holds the job to be destroyed
b5c6f776
GM		 3610 */
3611static void fc_bsg_softirq_done(struct request *rq)
3612{
3613 struct fc_bsg_job *job = rq->special;
3614 unsigned long flags;
9e4f5e29 3615
b5c6f776
GM		 3616 spin_lock_irqsave(&job->job_lock, flags);
3617 job->state_flags |= FC_RQST_STATE_DONE;
3618 job->ref_cnt--;
3619 spin_unlock_irqrestore(&job->job_lock, flags);
9e4f5e29 3620
b5c6f776 3621 blk_end_request_all(rq, rq->errors);
9e4f5e29
JS		 3622 fc_destroy_bsgjob(job);
3623}
3624
9e4f5e29
JS		 3625/**
3626 * fc_bsg_job_timeout - handler for when a bsg request timesout
3627 * @req: request that timed out
3628 */
3629static enum blk_eh_timer_return
3630fc_bsg_job_timeout(struct request *req)
3631{
3632 struct fc_bsg_job *job = (void *) req->special;
3633 struct Scsi_Host *shost = job->shost;
3634 struct fc_internal *i = to_fc_internal(shost->transportt);
3635 unsigned long flags;
3636 int err = 0, done = 0;
3637
3638 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3639 return BLK_EH_RESET_TIMER;
3640
3641 spin_lock_irqsave(&job->job_lock, flags);
3642 if (job->state_flags & FC_RQST_STATE_DONE)
3643 done = 1;
3644 else
3645 job->ref_cnt++;
3646 spin_unlock_irqrestore(&job->job_lock, flags);
3647
3648 if (!done && i->f->bsg_timeout) {
3649 /* call LLDD to abort the i/o as it has timed out */
3650 err = i->f->bsg_timeout(job);
b8f08645
SS		 3651 if (err == -EAGAIN) {
3652 job->ref_cnt--;
3653 return BLK_EH_RESET_TIMER;
3654 } else if (err)
9e4f5e29
JS		 3655 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3656 "abort failed with status %d\n", err);
3657 }
3658
9e4f5e29 3659 /* the blk_end_sync_io() doesn't check the error */
47e7e89e
GM		 3660 if (done)
3661 return BLK_EH_NOT_HANDLED;
3662 else
3663 return BLK_EH_HANDLED;
9e4f5e29
JS		 3664}
3665
9e4f5e29
JS		 3666static int
3667fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3668{
3669 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3670
3671 BUG_ON(!req->nr_phys_segments);
3672
3673 buf->sg_list = kzalloc(sz, GFP_KERNEL);
3674 if (!buf->sg_list)
3675 return -ENOMEM;
3676 sg_init_table(buf->sg_list, req->nr_phys_segments);
3677 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3678 buf->payload_len = blk_rq_bytes(req);
3679 return 0;
3680}
3681
3682
3683/**
3684 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3685 * bsg request
3686 * @shost: SCSI Host corresponding to the bsg object
3687 * @rport: (optional) FC Remote Port corresponding to the bsg object
3688 * @req: BSG request that needs a job structure
3689 */
3690static int
3691fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3692 struct request *req)
3693{
3694 struct fc_internal *i = to_fc_internal(shost->transportt);
3695 struct request *rsp = req->next_rq;
3696 struct fc_bsg_job *job;
3697 int ret;
3698
3699 BUG_ON(req->special);
3700
3701 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3702 GFP_KERNEL);
3703 if (!job)
3704 return -ENOMEM;
3705
3706 /*
3707 * Note: this is a bit silly.
3708 * The request gets formatted as a SGIO v4 ioctl request, which
3709 * then gets reformatted as a blk request, which then gets
3710 * reformatted as a fc bsg request. And on completion, we have
3711 * to wrap return results such that SGIO v4 thinks it was a scsi
3712 * status. I hope this was all worth it.
3713 */
3714
3715 req->special = job;
3716 job->shost = shost;
3717 job->rport = rport;
3718 job->req = req;
3719 if (i->f->dd_bsg_size)
3720 job->dd_data = (void *)&job[1];
3721 spin_lock_init(&job->job_lock);
3722 job->request = (struct fc_bsg_request *)req->cmd;
3723 job->request_len = req->cmd_len;
3724 job->reply = req->sense;
3725 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3726 * allocated */
3727 if (req->bio) {
3728 ret = fc_bsg_map_buffer(&job->request_payload, req);
3729 if (ret)
3730 goto failjob_rls_job;
3731 }
3732 if (rsp && rsp->bio) {
3733 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3734 if (ret)
3735 goto failjob_rls_rqst_payload;
3736 }
3737 job->job_done = fc_bsg_jobdone;
3738 if (rport)
3739 job->dev = &rport->dev;
3740 else
3741 job->dev = &shost->shost_gendev;
3742 get_device(job->dev); /* take a reference for the request */
3743
3744 job->ref_cnt = 1;
3745
3746 return 0;
3747
3748
3749failjob_rls_rqst_payload:
3750 kfree(job->request_payload.sg_list);
3751failjob_rls_job:
3752 kfree(job);
3753 return -ENOMEM;
3754}
3755
3756
3757enum fc_dispatch_result {
3758 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
3759 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
3760 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
3761};
3762
3763
3764/**
3765 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
5415907a 3766 * @q: fc host request queue
9e4f5e29
JS		 3767 * @shost: scsi host rport attached to
3768 * @job: bsg job to be processed
3769 */
3770static enum fc_dispatch_result
3771fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3772 struct fc_bsg_job *job)
3773{
3774 struct fc_internal *i = to_fc_internal(shost->transportt);
3775 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3776 int ret;
3777
3778 /* Validate the host command */
3779 switch (job->request->msgcode) {
3780 case FC_BSG_HST_ADD_RPORT:
3781 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3782 break;
3783
3784 case FC_BSG_HST_DEL_RPORT:
3785 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3786 break;
3787
3788 case FC_BSG_HST_ELS_NOLOGIN:
3789 cmdlen += sizeof(struct fc_bsg_host_els);
3790 /* there better be a xmt and rcv payloads */
3791 if ((!job->request_payload.payload_len) ||
3792 (!job->reply_payload.payload_len)) {
3793 ret = -EINVAL;
3794 goto fail_host_msg;
3795 }
3796 break;
3797
3798 case FC_BSG_HST_CT:
3799 cmdlen += sizeof(struct fc_bsg_host_ct);
3800 /* there better be xmt and rcv payloads */
3801 if ((!job->request_payload.payload_len) ||
3802 (!job->reply_payload.payload_len)) {
3803 ret = -EINVAL;
3804 goto fail_host_msg;
3805 }
3806 break;
3807
3808 case FC_BSG_HST_VENDOR:
3809 cmdlen += sizeof(struct fc_bsg_host_vendor);
3810 if ((shost->hostt->vendor_id == 0L) ||
3811 (job->request->rqst_data.h_vendor.vendor_id !=
3812 shost->hostt->vendor_id)) {
3813 ret = -ESRCH;
3814 goto fail_host_msg;
3815 }
3816 break;
3817
3818 default:
3819 ret = -EBADR;
3820 goto fail_host_msg;
3821 }
3822
3823 /* check if we really have all the request data needed */
3824 if (job->request_len < cmdlen) {
3825 ret = -ENOMSG;
3826 goto fail_host_msg;
3827 }
3828
3829 ret = i->f->bsg_request(job);
3830 if (!ret)
3831 return FC_DISPATCH_UNLOCKED;
3832
3833fail_host_msg:
3834 /* return the errno failure code as the only status */
3835 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3836 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS		 3837 job->reply->result = ret;
3838 job->reply_len = sizeof(uint32_t);
3839 fc_bsg_jobdone(job);
3840 return FC_DISPATCH_UNLOCKED;
3841}
3842
3843
3844/*
3845 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3846 * @rport: rport to be restarted
3847 */
3848static void
3849fc_bsg_goose_queue(struct fc_rport *rport)
3850{
9e4f5e29
JS		 3851 if (!rport->rqst_q)
3852 return;
3853
c21e6beb
JA		 3854 /*
3855 * This get/put dance makes no sense
3856 */
9e4f5e29 3857 get_device(&rport->dev);
c21e6beb 3858 blk_run_queue_async(rport->rqst_q);
9e4f5e29
JS		 3859 put_device(&rport->dev);
3860}
3861
9e4f5e29
JS		 3862/**
3863 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
5415907a 3864 * @q: rport request queue
9e4f5e29
JS		 3865 * @shost: scsi host rport attached to
3866 * @rport: rport request destined to
3867 * @job: bsg job to be processed
3868 */
3869static enum fc_dispatch_result
3870fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3871 struct fc_rport *rport, struct fc_bsg_job *job)
3872{
3873 struct fc_internal *i = to_fc_internal(shost->transportt);
3874 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3875 int ret;
3876
3877 /* Validate the rport command */
3878 switch (job->request->msgcode) {
3879 case FC_BSG_RPT_ELS:
3880 cmdlen += sizeof(struct fc_bsg_rport_els);
3881 goto check_bidi;
3882
3883 case FC_BSG_RPT_CT:
3884 cmdlen += sizeof(struct fc_bsg_rport_ct);
3885check_bidi:
3886 /* there better be xmt and rcv payloads */
3887 if ((!job->request_payload.payload_len) ||
3888 (!job->reply_payload.payload_len)) {
3889 ret = -EINVAL;
3890 goto fail_rport_msg;
3891 }
3892 break;
3893 default:
3894 ret = -EBADR;
3895 goto fail_rport_msg;
3896 }
3897
3898 /* check if we really have all the request data needed */
3899 if (job->request_len < cmdlen) {
3900 ret = -ENOMSG;
3901 goto fail_rport_msg;
3902 }
3903
3904 ret = i->f->bsg_request(job);
3905 if (!ret)
3906 return FC_DISPATCH_UNLOCKED;
3907
3908fail_rport_msg:
3909 /* return the errno failure code as the only status */
3910 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3911 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS		 3912 job->reply->result = ret;
3913 job->reply_len = sizeof(uint32_t);
3914 fc_bsg_jobdone(job);
3915 return FC_DISPATCH_UNLOCKED;
3916}
3917
3918
3919/**
3920 * fc_bsg_request_handler - generic handler for bsg requests
3921 * @q: request queue to manage
3922 * @shost: Scsi_Host related to the bsg object
3923 * @rport: FC remote port related to the bsg object (optional)
3924 * @dev: device structure for bsg object
3925 */
3926static void
3927fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3928 struct fc_rport *rport, struct device *dev)
3929{
3930 struct request *req;
3931 struct fc_bsg_job *job;
3932 enum fc_dispatch_result ret;
3933
3934 if (!get_device(dev))
3935 return;
3936
7eaceacc 3937 while (1) {
2bc1c59d
MC		 3938 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3939 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3940 break;
9e4f5e29
JS		 3941
3942 req = blk_fetch_request(q);
3943 if (!req)
3944 break;
3945
3946 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3947 req->errors = -ENXIO;
3948 spin_unlock_irq(q->queue_lock);
d88a714b 3949 blk_end_request_all(req, -ENXIO);
9e4f5e29
JS		 3950 spin_lock_irq(q->queue_lock);
3951 continue;
3952 }
3953
3954 spin_unlock_irq(q->queue_lock);
3955
3956 ret = fc_req_to_bsgjob(shost, rport, req);
3957 if (ret) {
3958 req->errors = ret;
d88a714b 3959 blk_end_request_all(req, ret);
9e4f5e29
JS		 3960 spin_lock_irq(q->queue_lock);
3961 continue;
3962 }
3963
3964 job = req->special;
3965
3966 /* check if we have the msgcode value at least */
3967 if (job->request_len < sizeof(uint32_t)) {
3968 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3969 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS		 3970 job->reply->result = -ENOMSG;
3971 job->reply_len = sizeof(uint32_t);
3972 fc_bsg_jobdone(job);
3973 spin_lock_irq(q->queue_lock);
3974 continue;
3975 }
3976
3977 /* the dispatch routines will unlock the queue_lock */
3978 if (rport)
3979 ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3980 else
3981 ret = fc_bsg_host_dispatch(q, shost, job);
3982
3983 /* did dispatcher hit state that can't process any more */
3984 if (ret == FC_DISPATCH_BREAK)
3985 break;
3986
3987 /* did dispatcher had released the lock */
3988 if (ret == FC_DISPATCH_UNLOCKED)
3989 spin_lock_irq(q->queue_lock);
3990 }
3991
3992 spin_unlock_irq(q->queue_lock);
3993 put_device(dev);
3994 spin_lock_irq(q->queue_lock);
3995}
3996
3997
3998/**
3999 * fc_bsg_host_handler - handler for bsg requests for a fc host
4000 * @q: fc host request queue
4001 */
4002static void
4003fc_bsg_host_handler(struct request_queue *q)
4004{
4005 struct Scsi_Host *shost = q->queuedata;
4006
4007 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
4008}
4009
4010
4011/**
4012 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
4013 * @q: rport request queue
4014 */
4015static void
4016fc_bsg_rport_handler(struct request_queue *q)
4017{
4018 struct fc_rport *rport = q->queuedata;
4019 struct Scsi_Host *shost = rport_to_shost(rport);
4020
4021 fc_bsg_request_handler(q, shost, rport, &rport->dev);
4022}
4023
4024
4025/**
4026 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4027 * @shost: shost for fc_host
4028 * @fc_host: fc_host adding the structures to
4029 */
4030static int
4031fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4032{
4033 struct device *dev = &shost->shost_gendev;
4034 struct fc_internal *i = to_fc_internal(shost->transportt);
4035 struct request_queue *q;
4036 int err;
3c559ea8 4037 char bsg_name[20];
9e4f5e29
JS		 4038
4039 fc_host->rqst_q = NULL;
4040
4041 if (!i->f->bsg_request)
4042 return -ENOTSUPP;
4043
4044 snprintf(bsg_name, sizeof(bsg_name),
4045 "fc_host%d", shost->host_no);
4046
4047 q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4048 if (!q) {
4049 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4050 "initialize - no request queue\n",
4051 shost->host_no);
4052 return -ENOMEM;
4053 }
4054
4055 q->queuedata = shost;
4056 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
b5c6f776 4057 blk_queue_softirq_done(q, fc_bsg_softirq_done);
9e4f5e29
JS		 4058 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4059 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4060
4061 err = bsg_register_queue(q, dev, bsg_name, NULL);
4062 if (err) {
4063 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4064 "initialize - register queue\n",
4065 shost->host_no);
4066 blk_cleanup_queue(q);
4067 return err;
4068 }
4069
4070 fc_host->rqst_q = q;
4071 return 0;
4072}
4073
4074
4075/**
4076 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4077 * @shost: shost that rport is attached to
4078 * @rport: rport that the bsg hooks are being attached to
4079 */
4080static int
4081fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4082{
4083 struct device *dev = &rport->dev;
4084 struct fc_internal *i = to_fc_internal(shost->transportt);
4085 struct request_queue *q;
4086 int err;
4087
4088 rport->rqst_q = NULL;
4089
4090 if (!i->f->bsg_request)
4091 return -ENOTSUPP;
4092
4093 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4094 if (!q) {
4095 printk(KERN_ERR "%s: bsg interface failed to "
4096 "initialize - no request queue\n",
4097 dev->kobj.name);
4098 return -ENOMEM;
4099 }
4100
4101 q->queuedata = rport;
4102 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
b5c6f776 4103 blk_queue_softirq_done(q, fc_bsg_softirq_done);
9e4f5e29
JS		 4104 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4105 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4106
4107 err = bsg_register_queue(q, dev, NULL, NULL);
4108 if (err) {
4109 printk(KERN_ERR "%s: bsg interface failed to "
4110 "initialize - register queue\n",
4111 dev->kobj.name);
4112 blk_cleanup_queue(q);
4113 return err;
4114 }
4115
4116 rport->rqst_q = q;
4117 return 0;
4118}
4119
4120
4121/**
4122 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4123 * @q: the request_queue that is to be torn down.
78d16341
JS		 4124 *
4125 * Notes:
4126 * Before unregistering the queue empty any requests that are blocked
4127 *
4128 *
9e4f5e29
JS		 4129 */
4130static void
4131fc_bsg_remove(struct request_queue *q)
4132{
78d16341
JS		 4133 struct request *req; /* block request */
4134 int counts; /* totals for request_list count and starved */
4135
9e4f5e29 4136 if (q) {
78d16341
JS		 4137 /* Stop taking in new requests */
4138 spin_lock_irq(q->queue_lock);
4139 blk_stop_queue(q);
4140
4141 /* drain all requests in the queue */
4142 while (1) {
4143 /* need the lock to fetch a request
4144 * this may fetch the same reqeust as the previous pass
4145 */
4146 req = blk_fetch_request(q);
4147 /* save requests in use and starved */
4148 counts = q->rq.count[0] + q->rq.count[1] +
4149 q->rq.starved[0] + q->rq.starved[1];
4150 spin_unlock_irq(q->queue_lock);
4151 /* any requests still outstanding? */
4152 if (counts == 0)
4153 break;
4154
4155 /* This may be the same req as the previous iteration,
4156 * always send the blk_end_request_all after a prefetch.
4157 * It is not okay to not end the request because the
4158 * prefetch started the request.
4159 */
4160 if (req) {
4161 /* return -ENXIO to indicate that this queue is
4162 * going away
4163 */
4164 req->errors = -ENXIO;
4165 blk_end_request_all(req, -ENXIO);
4166 }
4167
4168 msleep(200); /* allow bsg to possibly finish */
4169 spin_lock_irq(q->queue_lock);
4170 }
4171
9e4f5e29
JS		 4172 bsg_unregister_queue(q);
4173 blk_cleanup_queue(q);
4174 }
4175}
4176
4177
9ef3e4a4
JS		 4178/* Original Author: Martin Hicks */
4179MODULE_AUTHOR("James Smart");
1da177e4
LT		 4180MODULE_DESCRIPTION("FC Transport Attributes");
4181MODULE_LICENSE("GPL");
4182
4183module_init(fc_transport_init);
4184module_exit(fc_transport_exit);
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