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[SCSI] scsi_lib: fix potential NULL dereference
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / scsi_transport_fc.c
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9ef3e4a4 1/*
1da177e4
LT		 2 * FiberChannel transport specific attributes exported to sysfs.
3 *
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * ========
21 *
a53eb5e0 22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
1da177e4
LT		 23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
9ef3e4a4 25 * Add vports, etc
1da177e4
LT		 26 *
27 */
28#include <linux/module.h>
29#include <linux/init.h>
30#include <scsi/scsi_device.h>
31#include <scsi/scsi_host.h>
32#include <scsi/scsi_transport.h>
33#include <scsi/scsi_transport_fc.h>
c829c394 34#include <scsi/scsi_cmnd.h>
84314fd4
JS		 35#include <linux/netlink.h>
36#include <net/netlink.h>
37#include <scsi/scsi_netlink_fc.h>
9e4f5e29 38#include <scsi/scsi_bsg_fc.h>
1da177e4 39#include "scsi_priv.h"
7525236d 40#include "scsi_transport_fc_internal.h"
1da177e4 41
aedf3497 42static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
9ef3e4a4 43static void fc_vport_sched_delete(struct work_struct *work);
a30c3f69 44static int fc_vport_setup(struct Scsi_Host *shost, int channel,
a53eb5e0
JS		 45 struct device *pdev, struct fc_vport_identifiers *ids,
46 struct fc_vport **vport);
9e4f5e29
JS		 47static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
48static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
49static void fc_bsg_remove(struct request_queue *);
50static void fc_bsg_goose_queue(struct fc_rport *);
a53eb5e0 51
1da177e4
LT		 52/*
53 * Redefine so that we can have same named attributes in the
54 * sdev/starget/host objects.
55 */
ee959b00
TJ		 56#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
57struct device_attribute device_attr_##_prefix##_##_name = \
1da177e4
LT		 58 __ATTR(_name,_mode,_show,_store)
59
60#define fc_enum_name_search(title, table_type, table) \
61static const char *get_fc_##title##_name(enum table_type table_key) \
62{ \
63 int i; \
64 char *name = NULL; \
65 \
6391a113 66 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 67 if (table[i].value == table_key) { \
68 name = table[i].name; \
69 break; \
70 } \
71 } \
72 return name; \
73}
74
75#define fc_enum_name_match(title, table_type, table) \
76static int get_fc_##title##_match(const char *table_key, \
77 enum table_type *value) \
78{ \
79 int i; \
80 \
6391a113 81 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 82 if (strncmp(table_key, table[i].name, \
83 table[i].matchlen) == 0) { \
84 *value = table[i].value; \
85 return 0; /* success */ \
86 } \
87 } \
88 return 1; /* failure */ \
89}
90
91
92/* Convert fc_port_type values to ascii string name */
93static struct {
94 enum fc_port_type value;
95 char *name;
96} fc_port_type_names[] = {
97 { FC_PORTTYPE_UNKNOWN, "Unknown" },
98 { FC_PORTTYPE_OTHER, "Other" },
99 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
100 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
101 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
102 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
951948a3 103 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
a53eb5e0 104 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
1da177e4
LT		 105};
106fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
107#define FC_PORTTYPE_MAX_NAMELEN 50
108
a53eb5e0
JS		 109/* Reuse fc_port_type enum function for vport_type */
110#define get_fc_vport_type_name get_fc_port_type_name
111
1da177e4 112
84314fd4
JS		 113/* Convert fc_host_event_code values to ascii string name */
114static const struct {
115 enum fc_host_event_code value;
116 char *name;
117} fc_host_event_code_names[] = {
118 { FCH_EVT_LIP, "lip" },
119 { FCH_EVT_LINKUP, "link_up" },
120 { FCH_EVT_LINKDOWN, "link_down" },
121 { FCH_EVT_LIPRESET, "lip_reset" },
122 { FCH_EVT_RSCN, "rscn" },
123 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
124 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
125 { FCH_EVT_PORT_ONLINE, "port_online" },
126 { FCH_EVT_PORT_OFFLINE, "port_offline" },
127 { FCH_EVT_PORT_FABRIC, "port_fabric" },
128 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
129 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
130};
131fc_enum_name_search(host_event_code, fc_host_event_code,
132 fc_host_event_code_names)
133#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
134
135
1da177e4
LT		 136/* Convert fc_port_state values to ascii string name */
137static struct {
138 enum fc_port_state value;
139 char *name;
140} fc_port_state_names[] = {
141 { FC_PORTSTATE_UNKNOWN, "Unknown" },
142 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
143 { FC_PORTSTATE_ONLINE, "Online" },
144 { FC_PORTSTATE_OFFLINE, "Offline" },
145 { FC_PORTSTATE_BLOCKED, "Blocked" },
146 { FC_PORTSTATE_BYPASSED, "Bypassed" },
147 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
148 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
149 { FC_PORTSTATE_ERROR, "Error" },
150 { FC_PORTSTATE_LOOPBACK, "Loopback" },
42e33148 151 { FC_PORTSTATE_DELETED, "Deleted" },
1da177e4
LT		 152};
153fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
154#define FC_PORTSTATE_MAX_NAMELEN 20
155
156
a53eb5e0
JS		 157/* Convert fc_vport_state values to ascii string name */
158static struct {
159 enum fc_vport_state value;
160 char *name;
161} fc_vport_state_names[] = {
162 { FC_VPORT_UNKNOWN, "Unknown" },
163 { FC_VPORT_ACTIVE, "Active" },
164 { FC_VPORT_DISABLED, "Disabled" },
165 { FC_VPORT_LINKDOWN, "Linkdown" },
166 { FC_VPORT_INITIALIZING, "Initializing" },
167 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
168 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
169 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
170 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
171 { FC_VPORT_FAILED, "VPort Failed" },
172};
173fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
174#define FC_VPORTSTATE_MAX_NAMELEN 24
175
176/* Reuse fc_vport_state enum function for vport_last_state */
177#define get_fc_vport_last_state_name get_fc_vport_state_name
178
179
1da177e4 180/* Convert fc_tgtid_binding_type values to ascii string name */
0ad78200 181static const struct {
1da177e4
LT		 182 enum fc_tgtid_binding_type value;
183 char *name;
184 int matchlen;
185} fc_tgtid_binding_type_names[] = {
186 { FC_TGTID_BIND_NONE, "none", 4 },
187 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
188 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
189 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
190};
191fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
192 fc_tgtid_binding_type_names)
193fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
194 fc_tgtid_binding_type_names)
195#define FC_BINDTYPE_MAX_NAMELEN 30
196
197
198#define fc_bitfield_name_search(title, table) \
199static ssize_t \
200get_fc_##title##_names(u32 table_key, char *buf) \
201{ \
202 char *prefix = ""; \
203 ssize_t len = 0; \
204 int i; \
205 \
6391a113 206 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 207 if (table[i].value & table_key) { \
208 len += sprintf(buf + len, "%s%s", \
209 prefix, table[i].name); \
210 prefix = ", "; \
211 } \
212 } \
213 len += sprintf(buf + len, "\n"); \
214 return len; \
215}
216
217
218/* Convert FC_COS bit values to ascii string name */
0ad78200 219static const struct {
1da177e4
LT		 220 u32 value;
221 char *name;
222} fc_cos_names[] = {
223 { FC_COS_CLASS1, "Class 1" },
224 { FC_COS_CLASS2, "Class 2" },
225 { FC_COS_CLASS3, "Class 3" },
226 { FC_COS_CLASS4, "Class 4" },
227 { FC_COS_CLASS6, "Class 6" },
228};
229fc_bitfield_name_search(cos, fc_cos_names)
230
231
232/* Convert FC_PORTSPEED bit values to ascii string name */
0ad78200 233static const struct {
1da177e4
LT		 234 u32 value;
235 char *name;
236} fc_port_speed_names[] = {
237 { FC_PORTSPEED_1GBIT, "1 Gbit" },
238 { FC_PORTSPEED_2GBIT, "2 Gbit" },
239 { FC_PORTSPEED_4GBIT, "4 Gbit" },
240 { FC_PORTSPEED_10GBIT, "10 Gbit" },
c3d2350a
JS		 241 { FC_PORTSPEED_8GBIT, "8 Gbit" },
242 { FC_PORTSPEED_16GBIT, "16 Gbit" },
1da177e4
LT		 243 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
244};
245fc_bitfield_name_search(port_speed, fc_port_speed_names)
246
247
248static int
249show_fc_fc4s (char *buf, u8 *fc4_list)
250{
251 int i, len=0;
252
253 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
254 len += sprintf(buf + len , "0x%02x ", *fc4_list);
255 len += sprintf(buf + len, "\n");
256 return len;
257}
258
259
a53eb5e0 260/* Convert FC_PORT_ROLE bit values to ascii string name */
0ad78200 261static const struct {
1da177e4
LT		 262 u32 value;
263 char *name;
a53eb5e0
JS		 264} fc_port_role_names[] = {
265 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
266 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
267 { FC_PORT_ROLE_IP_PORT, "IP Port" },
1da177e4 268};
a53eb5e0 269fc_bitfield_name_search(port_roles, fc_port_role_names)
1da177e4
LT		 270
271/*
272 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
273 */
274#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
275#define FC_WELLKNOWN_ROLE_MASK 0x00000f
276#define FC_FPORT_PORTID 0x00000e
277#define FC_FABCTLR_PORTID 0x00000d
278#define FC_DIRSRVR_PORTID 0x00000c
279#define FC_TIMESRVR_PORTID 0x00000b
280#define FC_MGMTSRVR_PORTID 0x00000a
281
282
c4028958
DH		 283static void fc_timeout_deleted_rport(struct work_struct *work);
284static void fc_timeout_fail_rport_io(struct work_struct *work);
285static void fc_scsi_scan_rport(struct work_struct *work);
1da177e4
LT		 286
287/*
288 * Attribute counts pre object type...
289 * Increase these values if you add attributes
290 */
291#define FC_STARGET_NUM_ATTRS 3
0f29b966 292#define FC_RPORT_NUM_ATTRS 10
a53eb5e0 293#define FC_VPORT_NUM_ATTRS 9
4643682b 294#define FC_HOST_NUM_ATTRS 22
1da177e4
LT		 295
296struct fc_internal {
297 struct scsi_transport_template t;
298 struct fc_function_template *f;
299
300 /*
301 * For attributes : each object has :
302 * An array of the actual attributes structures
303 * An array of null-terminated pointers to the attribute
304 * structures - used for mid-layer interaction.
305 *
306 * The attribute containers for the starget and host are are
307 * part of the midlayer. As the remote port is specific to the
308 * fc transport, we must provide the attribute container.
309 */
ee959b00 310 struct device_attribute private_starget_attrs[
1da177e4 311 FC_STARGET_NUM_ATTRS];
ee959b00 312 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
1da177e4 313
ee959b00
TJ		 314 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
315 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
1da177e4
LT		 316
317 struct transport_container rport_attr_cont;
ee959b00
TJ		 318 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
319 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
a53eb5e0
JS		 320
321 struct transport_container vport_attr_cont;
ee959b00
TJ		 322 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
323 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
1da177e4
LT		 324};
325
326#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
327
d0a7e574 328static int fc_target_setup(struct transport_container *tc, struct device *dev,
ee959b00 329 struct device *cdev)
1da177e4
LT		 330{
331 struct scsi_target *starget = to_scsi_target(dev);
332 struct fc_rport *rport = starget_to_rport(starget);
333
334 /*
335 * if parent is remote port, use values from remote port.
336 * Otherwise, this host uses the fc_transport, but not the
337 * remote port interface. As such, initialize to known non-values.
338 */
339 if (rport) {
340 fc_starget_node_name(starget) = rport->node_name;
341 fc_starget_port_name(starget) = rport->port_name;
342 fc_starget_port_id(starget) = rport->port_id;
343 } else {
344 fc_starget_node_name(starget) = -1;
345 fc_starget_port_name(starget) = -1;
346 fc_starget_port_id(starget) = -1;
347 }
348
349 return 0;
350}
351
352static DECLARE_TRANSPORT_CLASS(fc_transport_class,
353 "fc_transport",
354 fc_target_setup,
355 NULL,
356 NULL);
357
d0a7e574 358static int fc_host_setup(struct transport_container *tc, struct device *dev,
ee959b00 359 struct device *cdev)
1da177e4
LT		 360{
361 struct Scsi_Host *shost = dev_to_shost(dev);
aedf3497 362 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4 363
9ef3e4a4 364 /*
1da177e4
LT		 365 * Set default values easily detected by the midlayer as
366 * failure cases. The scsi lldd is responsible for initializing
367 * all transport attributes to valid values per host.
368 */
aedf3497
JS		 369 fc_host->node_name = -1;
370 fc_host->port_name = -1;
371 fc_host->permanent_port_name = -1;
372 fc_host->supported_classes = FC_COS_UNSPECIFIED;
373 memset(fc_host->supported_fc4s, 0,
374 sizeof(fc_host->supported_fc4s));
aedf3497
JS		 375 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
376 fc_host->maxframe_size = -1;
a53eb5e0 377 fc_host->max_npiv_vports = 0;
aedf3497
JS		 378 memset(fc_host->serial_number, 0,
379 sizeof(fc_host->serial_number));
380
381 fc_host->port_id = -1;
382 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
383 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
384 memset(fc_host->active_fc4s, 0,
385 sizeof(fc_host->active_fc4s));
386 fc_host->speed = FC_PORTSPEED_UNKNOWN;
387 fc_host->fabric_name = -1;
b8d08210
JS		 388 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
389 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
aedf3497
JS		 390
391 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
392
393 INIT_LIST_HEAD(&fc_host->rports);
394 INIT_LIST_HEAD(&fc_host->rport_bindings);
a53eb5e0 395 INIT_LIST_HEAD(&fc_host->vports);
aedf3497
JS		 396 fc_host->next_rport_number = 0;
397 fc_host->next_target_id = 0;
a53eb5e0
JS		 398 fc_host->next_vport_number = 0;
399 fc_host->npiv_vports_inuse = 0;
aedf3497 400
aab0de24
KS		 401 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
402 "fc_wq_%d", shost->host_no);
aedf3497
JS		 403 fc_host->work_q = create_singlethread_workqueue(
404 fc_host->work_q_name);
405 if (!fc_host->work_q)
406 return -ENOMEM;
407
aab0de24
KS		 408 snprintf(fc_host->devloss_work_q_name,
409 sizeof(fc_host->devloss_work_q_name),
410 "fc_dl_%d", shost->host_no);
aedf3497
JS		 411 fc_host->devloss_work_q = create_singlethread_workqueue(
412 fc_host->devloss_work_q_name);
413 if (!fc_host->devloss_work_q) {
414 destroy_workqueue(fc_host->work_q);
415 fc_host->work_q = NULL;
416 return -ENOMEM;
417 }
418
9e4f5e29
JS		 419 fc_bsg_hostadd(shost, fc_host);
420 /* ignore any bsg add error - we just can't do sgio */
421
422 return 0;
423}
424
425static int fc_host_remove(struct transport_container *tc, struct device *dev,
426 struct device *cdev)
427{
428 struct Scsi_Host *shost = dev_to_shost(dev);
429 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
430
431 fc_bsg_remove(fc_host->rqst_q);
1da177e4
LT		 432 return 0;
433}
434
435static DECLARE_TRANSPORT_CLASS(fc_host_class,
436 "fc_host",
437 fc_host_setup,
9e4f5e29 438 fc_host_remove,
1da177e4
LT		 439 NULL);
440
441/*
442 * Setup and Remove actions for remote ports are handled
443 * in the service functions below.
444 */
445static DECLARE_TRANSPORT_CLASS(fc_rport_class,
446 "fc_remote_ports",
447 NULL,
448 NULL,
449 NULL);
450
a53eb5e0
JS		 451/*
452 * Setup and Remove actions for virtual ports are handled
453 * in the service functions below.
454 */
455static DECLARE_TRANSPORT_CLASS(fc_vport_class,
456 "fc_vports",
457 NULL,
458 NULL,
459 NULL);
460
1da177e4
LT		 461/*
462 * Module Parameters
463 */
464
465/*
466 * dev_loss_tmo: the default number of seconds that the FC transport
467 * should insulate the loss of a remote port.
468 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
469 */
1c9e16e4 470static unsigned int fc_dev_loss_tmo = 60; /* seconds */
1da177e4 471
10f4b89a 472module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
1da177e4
LT		 473MODULE_PARM_DESC(dev_loss_tmo,
474 "Maximum number of seconds that the FC transport should"
475 " insulate the loss of a remote port. Once this value is"
476 " exceeded, the scsi target is removed. Value should be"
477 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
478
eb44820c 479/*
84314fd4 480 * Netlink Infrastructure
eb44820c 481 */
84314fd4
JS		 482
483static atomic_t fc_event_seq;
484
485/**
486 * fc_get_event_number - Obtain the next sequential FC event number
487 *
488 * Notes:
eb44820c 489 * We could have inlined this, but it would have required fc_event_seq to
84314fd4
JS		 490 * be exposed. For now, live with the subroutine call.
491 * Atomic used to avoid lock/unlock...
eb44820c 492 */
84314fd4
JS		 493u32
494fc_get_event_number(void)
495{
496 return atomic_add_return(1, &fc_event_seq);
497}
498EXPORT_SYMBOL(fc_get_event_number);
499
500
501/**
502 * fc_host_post_event - called to post an even on an fc_host.
84314fd4
JS		 503 * @shost: host the event occurred on
504 * @event_number: fc event number obtained from get_fc_event_number()
505 * @event_code: fc_host event being posted
506 * @event_data: 32bits of data for the event being posted
507 *
508 * Notes:
509 * This routine assumes no locks are held on entry.
eb44820c 510 */
84314fd4
JS		 511void
512fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
513 enum fc_host_event_code event_code, u32 event_data)
514{
515 struct sk_buff *skb;
516 struct nlmsghdr *nlh;
517 struct fc_nl_event *event;
518 const char *name;
519 u32 len, skblen;
520 int err;
521
522 if (!scsi_nl_sock) {
523 err = -ENOENT;
524 goto send_fail;
525 }
526
527 len = FC_NL_MSGALIGN(sizeof(*event));
528 skblen = NLMSG_SPACE(len);
529
530 skb = alloc_skb(skblen, GFP_KERNEL);
531 if (!skb) {
532 err = -ENOBUFS;
533 goto send_fail;
534 }
535
536 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
537 skblen - sizeof(*nlh), 0);
538 if (!nlh) {
539 err = -ENOBUFS;
540 goto send_fail_skb;
541 }
542 event = NLMSG_DATA(nlh);
543
544 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
545 FC_NL_ASYNC_EVENT, len);
546 event->seconds = get_seconds();
547 event->vendor_id = 0;
548 event->host_no = shost->host_no;
549 event->event_datalen = sizeof(u32); /* bytes */
550 event->event_num = event_number;
551 event->event_code = event_code;
552 event->event_data = event_data;
553
ff491a73
PNA		 554 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
555 GFP_KERNEL);
84314fd4
JS		 556 return;
557
558send_fail_skb:
559 kfree_skb(skb);
560send_fail:
561 name = get_fc_host_event_code_name(event_code);
562 printk(KERN_WARNING
563 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
cadbd4a5 564 __func__, shost->host_no,
84314fd4
JS		 565 (name) ? name : "<unknown>", event_data, err);
566 return;
567}
568EXPORT_SYMBOL(fc_host_post_event);
569
570
571/**
eb44820c 572 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
84314fd4
JS		 573 * @shost: host the event occurred on
574 * @event_number: fc event number obtained from get_fc_event_number()
575 * @data_len: amount, in bytes, of vendor unique data
576 * @data_buf: pointer to vendor unique data
eb44820c 577 * @vendor_id: Vendor id
84314fd4
JS		 578 *
579 * Notes:
580 * This routine assumes no locks are held on entry.
eb44820c 581 */
84314fd4
JS		 582void
583fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
f14e2e29 584 u32 data_len, char * data_buf, u64 vendor_id)
84314fd4
JS		 585{
586 struct sk_buff *skb;
587 struct nlmsghdr *nlh;
588 struct fc_nl_event *event;
589 u32 len, skblen;
590 int err;
591
592 if (!scsi_nl_sock) {
593 err = -ENOENT;
594 goto send_vendor_fail;
595 }
596
597 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
598 skblen = NLMSG_SPACE(len);
599
600 skb = alloc_skb(skblen, GFP_KERNEL);
601 if (!skb) {
602 err = -ENOBUFS;
603 goto send_vendor_fail;
604 }
605
606 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
607 skblen - sizeof(*nlh), 0);
608 if (!nlh) {
609 err = -ENOBUFS;
610 goto send_vendor_fail_skb;
611 }
612 event = NLMSG_DATA(nlh);
613
614 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
615 FC_NL_ASYNC_EVENT, len);
616 event->seconds = get_seconds();
617 event->vendor_id = vendor_id;
618 event->host_no = shost->host_no;
619 event->event_datalen = data_len; /* bytes */
620 event->event_num = event_number;
621 event->event_code = FCH_EVT_VENDOR_UNIQUE;
622 memcpy(&event->event_data, data_buf, data_len);
623
ff491a73
PNA		 624 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
625 GFP_KERNEL);
84314fd4
JS		 626 return;
627
628send_vendor_fail_skb:
629 kfree_skb(skb);
630send_vendor_fail:
631 printk(KERN_WARNING
632 "%s: Dropped Event : host %d vendor_unique - err %d\n",
cadbd4a5 633 __func__, shost->host_no, err);
84314fd4
JS		 634 return;
635}
636EXPORT_SYMBOL(fc_host_post_vendor_event);
637
638
1da177e4
LT		 639
640static __init int fc_transport_init(void)
641{
84314fd4
JS		 642 int error;
643
644 atomic_set(&fc_event_seq, 0);
645
646 error = transport_class_register(&fc_host_class);
a53eb5e0
JS		 647 if (error)
648 return error;
649 error = transport_class_register(&fc_vport_class);
1da177e4
LT		 650 if (error)
651 return error;
652 error = transport_class_register(&fc_rport_class);
653 if (error)
654 return error;
655 return transport_class_register(&fc_transport_class);
656}
657
658static void __exit fc_transport_exit(void)
659{
660 transport_class_unregister(&fc_transport_class);
661 transport_class_unregister(&fc_rport_class);
662 transport_class_unregister(&fc_host_class);
a53eb5e0 663 transport_class_unregister(&fc_vport_class);
1da177e4
LT		 664}
665
666/*
667 * FC Remote Port Attribute Management
668 */
669
670#define fc_rport_show_function(field, format_string, sz, cast) \
671static ssize_t \
ee959b00
TJ		 672show_fc_rport_##field (struct device *dev, \
673 struct device_attribute *attr, char *buf) \
1da177e4 674{ \
ee959b00 675 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 676 struct Scsi_Host *shost = rport_to_shost(rport); \
677 struct fc_internal *i = to_fc_internal(shost->transportt); \
19a7b4ae
JSEC		 678 if ((i->f->get_rport_##field) && \
679 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 680 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae 681 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
1da177e4
LT		 682 i->f->get_rport_##field(rport); \
683 return snprintf(buf, sz, format_string, cast rport->field); \
684}
685
686#define fc_rport_store_function(field) \
687static ssize_t \
ee959b00
TJ		 688store_fc_rport_##field(struct device *dev, \
689 struct device_attribute *attr, \
690 const char *buf, size_t count) \
1da177e4
LT		 691{ \
692 int val; \
ee959b00 693 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 694 struct Scsi_Host *shost = rport_to_shost(rport); \
695 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 696 char *cp; \
19a7b4ae 697 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 698 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae
JSEC		 699 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
700 return -EBUSY; \
0f29b966
JS		 701 val = simple_strtoul(buf, &cp, 0); \
702 if (*cp && (*cp != '\n')) \
703 return -EINVAL; \
1da177e4
LT		 704 i->f->set_rport_##field(rport, val); \
705 return count; \
706}
707
708#define fc_rport_rd_attr(field, format_string, sz) \
709 fc_rport_show_function(field, format_string, sz, ) \
ee959b00 710static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 711 show_fc_rport_##field, NULL)
712
713#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
714 fc_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 715static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 716 show_fc_rport_##field, NULL)
717
718#define fc_rport_rw_attr(field, format_string, sz) \
719 fc_rport_show_function(field, format_string, sz, ) \
720 fc_rport_store_function(field) \
ee959b00 721static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 722 show_fc_rport_##field, \
723 store_fc_rport_##field)
724
725
726#define fc_private_rport_show_function(field, format_string, sz, cast) \
727static ssize_t \
ee959b00
TJ		 728show_fc_rport_##field (struct device *dev, \
729 struct device_attribute *attr, char *buf) \
1da177e4 730{ \
ee959b00 731 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 732 return snprintf(buf, sz, format_string, cast rport->field); \
733}
734
735#define fc_private_rport_rd_attr(field, format_string, sz) \
736 fc_private_rport_show_function(field, format_string, sz, ) \
ee959b00 737static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 738 show_fc_rport_##field, NULL)
739
740#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
741 fc_private_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 742static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 743 show_fc_rport_##field, NULL)
744
745
746#define fc_private_rport_rd_enum_attr(title, maxlen) \
747static ssize_t \
ee959b00
TJ		 748show_fc_rport_##title (struct device *dev, \
749 struct device_attribute *attr, char *buf) \
1da177e4 750{ \
ee959b00 751 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 752 const char *name; \
753 name = get_fc_##title##_name(rport->title); \
754 if (!name) \
755 return -EINVAL; \
756 return snprintf(buf, maxlen, "%s\n", name); \
757} \
ee959b00 758static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1da177e4
LT		 759 show_fc_rport_##title, NULL)
760
761
762#define SETUP_RPORT_ATTRIBUTE_RD(field) \
ee959b00 763 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 764 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
765 i->private_rport_attrs[count].store = NULL; \
766 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
767 if (i->f->show_rport_##field) \
768 count++
769
770#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
ee959b00 771 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 772 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
773 i->private_rport_attrs[count].store = NULL; \
774 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
775 count++
776
777#define SETUP_RPORT_ATTRIBUTE_RW(field) \
ee959b00 778 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 779 if (!i->f->set_rport_##field) { \
780 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
781 i->private_rport_attrs[count].store = NULL; \
782 } \
783 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
784 if (i->f->show_rport_##field) \
785 count++
786
0f29b966
JS		 787#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
788{ \
ee959b00 789 i->private_rport_attrs[count] = device_attr_rport_##field; \
0f29b966
JS		 790 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
791 count++; \
792}
793
1da177e4
LT		 794
795/* The FC Transport Remote Port Attributes: */
796
797/* Fixed Remote Port Attributes */
798
799fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
800
801static ssize_t
ee959b00
TJ		 802show_fc_rport_supported_classes (struct device *dev,
803 struct device_attribute *attr, char *buf)
1da177e4 804{
ee959b00 805 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 806 if (rport->supported_classes == FC_COS_UNSPECIFIED)
807 return snprintf(buf, 20, "unspecified\n");
808 return get_fc_cos_names(rport->supported_classes, buf);
809}
ee959b00 810static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1da177e4
LT		 811 show_fc_rport_supported_classes, NULL);
812
813/* Dynamic Remote Port Attributes */
814
19a7b4ae
JSEC		 815/*
816 * dev_loss_tmo attribute
817 */
818fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
819static ssize_t
ee959b00
TJ		 820store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
821 const char *buf, size_t count)
19a7b4ae
JSEC		 822{
823 int val;
ee959b00 824 struct fc_rport *rport = transport_class_to_rport(dev);
19a7b4ae
JSEC		 825 struct Scsi_Host *shost = rport_to_shost(rport);
826 struct fc_internal *i = to_fc_internal(shost->transportt);
0f29b966 827 char *cp;
19a7b4ae 828 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
42e33148 829 (rport->port_state == FC_PORTSTATE_DELETED) ||
19a7b4ae
JSEC		 830 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
831 return -EBUSY;
0f29b966
JS		 832 val = simple_strtoul(buf, &cp, 0);
833 if ((*cp && (*cp != '\n')) ||
834 (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
19a7b4ae
JSEC		 835 return -EINVAL;
836 i->f->set_rport_dev_loss_tmo(rport, val);
837 return count;
838}
ee959b00 839static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
19a7b4ae 840 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1da177e4
LT		 841
842
843/* Private Remote Port Attributes */
844
845fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
846fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
847fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
848
849static ssize_t
ee959b00
TJ		 850show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
851 char *buf)
1da177e4 852{
ee959b00 853 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 854
855 /* identify any roles that are port_id specific */
856 if ((rport->port_id != -1) &&
857 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
858 FC_WELLKNOWN_PORTID_MASK) {
859 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
860 case FC_FPORT_PORTID:
861 return snprintf(buf, 30, "Fabric Port\n");
862 case FC_FABCTLR_PORTID:
863 return snprintf(buf, 30, "Fabric Controller\n");
864 case FC_DIRSRVR_PORTID:
865 return snprintf(buf, 30, "Directory Server\n");
866 case FC_TIMESRVR_PORTID:
867 return snprintf(buf, 30, "Time Server\n");
868 case FC_MGMTSRVR_PORTID:
869 return snprintf(buf, 30, "Management Server\n");
870 default:
871 return snprintf(buf, 30, "Unknown Fabric Entity\n");
872 }
873 } else {
a53eb5e0 874 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1da177e4 875 return snprintf(buf, 20, "unknown\n");
a53eb5e0 876 return get_fc_port_roles_names(rport->roles, buf);
1da177e4
LT		 877 }
878}
ee959b00 879static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1da177e4
LT		 880 show_fc_rport_roles, NULL);
881
882fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
883fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
884
0f29b966
JS		 885/*
886 * fast_io_fail_tmo attribute
887 */
888static ssize_t
ee959b00
TJ		 889show_fc_rport_fast_io_fail_tmo (struct device *dev,
890 struct device_attribute *attr, char *buf)
0f29b966 891{
ee959b00 892 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 893
894 if (rport->fast_io_fail_tmo == -1)
895 return snprintf(buf, 5, "off\n");
896 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
897}
898
899static ssize_t
ee959b00
TJ		 900store_fc_rport_fast_io_fail_tmo(struct device *dev,
901 struct device_attribute *attr, const char *buf,
902 size_t count)
0f29b966
JS		 903{
904 int val;
905 char *cp;
ee959b00 906 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 907
908 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
909 (rport->port_state == FC_PORTSTATE_DELETED) ||
910 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
911 return -EBUSY;
912 if (strncmp(buf, "off", 3) == 0)
913 rport->fast_io_fail_tmo = -1;
914 else {
915 val = simple_strtoul(buf, &cp, 0);
916 if ((*cp && (*cp != '\n')) ||
917 (val < 0) || (val >= rport->dev_loss_tmo))
918 return -EINVAL;
919 rport->fast_io_fail_tmo = val;
920 }
921 return count;
922}
ee959b00 923static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
0f29b966 924 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1da177e4
LT		 925
926
927/*
928 * FC SCSI Target Attribute Management
929 */
930
931/*
932 * Note: in the target show function we recognize when the remote
a53eb5e0 933 * port is in the heirarchy and do not allow the driver to get
1da177e4
LT		 934 * involved in sysfs functions. The driver only gets involved if
935 * it's the "old" style that doesn't use rports.
936 */
937#define fc_starget_show_function(field, format_string, sz, cast) \
938static ssize_t \
ee959b00
TJ		 939show_fc_starget_##field (struct device *dev, \
940 struct device_attribute *attr, char *buf) \
1da177e4 941{ \
ee959b00 942 struct scsi_target *starget = transport_class_to_starget(dev); \
1da177e4
LT		 943 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
944 struct fc_internal *i = to_fc_internal(shost->transportt); \
945 struct fc_rport *rport = starget_to_rport(starget); \
946 if (rport) \
947 fc_starget_##field(starget) = rport->field; \
948 else if (i->f->get_starget_##field) \
949 i->f->get_starget_##field(starget); \
950 return snprintf(buf, sz, format_string, \
951 cast fc_starget_##field(starget)); \
952}
953
954#define fc_starget_rd_attr(field, format_string, sz) \
955 fc_starget_show_function(field, format_string, sz, ) \
ee959b00 956static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 957 show_fc_starget_##field, NULL)
958
959#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
960 fc_starget_show_function(field, format_string, sz, (cast)) \
ee959b00 961static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 962 show_fc_starget_##field, NULL)
963
964#define SETUP_STARGET_ATTRIBUTE_RD(field) \
ee959b00 965 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 966 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
967 i->private_starget_attrs[count].store = NULL; \
968 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
969 if (i->f->show_starget_##field) \
970 count++
971
972#define SETUP_STARGET_ATTRIBUTE_RW(field) \
ee959b00 973 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 974 if (!i->f->set_starget_##field) { \
975 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
976 i->private_starget_attrs[count].store = NULL; \
977 } \
978 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
979 if (i->f->show_starget_##field) \
980 count++
981
982/* The FC Transport SCSI Target Attributes: */
983fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
984fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
985fc_starget_rd_attr(port_id, "0x%06x\n", 20);
986
987
a53eb5e0
JS		 988/*
989 * FC Virtual Port Attribute Management
990 */
991
992#define fc_vport_show_function(field, format_string, sz, cast) \
993static ssize_t \
ee959b00
TJ		 994show_fc_vport_##field (struct device *dev, \
995 struct device_attribute *attr, char *buf) \
a53eb5e0 996{ \
ee959b00 997 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 998 struct Scsi_Host *shost = vport_to_shost(vport); \
999 struct fc_internal *i = to_fc_internal(shost->transportt); \
1000 if ((i->f->get_vport_##field) && \
1001 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1002 i->f->get_vport_##field(vport); \
1003 return snprintf(buf, sz, format_string, cast vport->field); \
1004}
1005
1006#define fc_vport_store_function(field) \
1007static ssize_t \
ee959b00
TJ		 1008store_fc_vport_##field(struct device *dev, \
1009 struct device_attribute *attr, \
1010 const char *buf, size_t count) \
a53eb5e0
JS		 1011{ \
1012 int val; \
ee959b00 1013 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1014 struct Scsi_Host *shost = vport_to_shost(vport); \
1015 struct fc_internal *i = to_fc_internal(shost->transportt); \
1016 char *cp; \
1017 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1018 return -EBUSY; \
1019 val = simple_strtoul(buf, &cp, 0); \
1020 if (*cp && (*cp != '\n')) \
1021 return -EINVAL; \
1022 i->f->set_vport_##field(vport, val); \
1023 return count; \
1024}
1025
1026#define fc_vport_store_str_function(field, slen) \
1027static ssize_t \
ee959b00
TJ		 1028store_fc_vport_##field(struct device *dev, \
1029 struct device_attribute *attr, \
1030 const char *buf, size_t count) \
a53eb5e0 1031{ \
ee959b00 1032 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1033 struct Scsi_Host *shost = vport_to_shost(vport); \
1034 struct fc_internal *i = to_fc_internal(shost->transportt); \
1035 unsigned int cnt=count; \
1036 \
1037 /* count may include a LF at end of string */ \
1038 if (buf[cnt-1] == '\n') \
1039 cnt--; \
1040 if (cnt > ((slen) - 1)) \
1041 return -EINVAL; \
1042 memcpy(vport->field, buf, cnt); \
1043 i->f->set_vport_##field(vport); \
1044 return count; \
1045}
1046
1047#define fc_vport_rd_attr(field, format_string, sz) \
1048 fc_vport_show_function(field, format_string, sz, ) \
ee959b00 1049static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1050 show_fc_vport_##field, NULL)
1051
1052#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1053 fc_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1054static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1055 show_fc_vport_##field, NULL)
1056
1057#define fc_vport_rw_attr(field, format_string, sz) \
1058 fc_vport_show_function(field, format_string, sz, ) \
1059 fc_vport_store_function(field) \
ee959b00 1060static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1061 show_fc_vport_##field, \
1062 store_fc_vport_##field)
1063
1064#define fc_private_vport_show_function(field, format_string, sz, cast) \
1065static ssize_t \
ee959b00
TJ		 1066show_fc_vport_##field (struct device *dev, \
1067 struct device_attribute *attr, char *buf) \
a53eb5e0 1068{ \
ee959b00 1069 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1070 return snprintf(buf, sz, format_string, cast vport->field); \
1071}
1072
1073#define fc_private_vport_store_u32_function(field) \
1074static ssize_t \
ee959b00
TJ		 1075store_fc_vport_##field(struct device *dev, \
1076 struct device_attribute *attr, \
1077 const char *buf, size_t count) \
a53eb5e0
JS		 1078{ \
1079 u32 val; \
ee959b00 1080 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1081 char *cp; \
1082 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1083 return -EBUSY; \
1084 val = simple_strtoul(buf, &cp, 0); \
1085 if (*cp && (*cp != '\n')) \
1086 return -EINVAL; \
1087 vport->field = val; \
1088 return count; \
1089}
1090
1091
1092#define fc_private_vport_rd_attr(field, format_string, sz) \
1093 fc_private_vport_show_function(field, format_string, sz, ) \
ee959b00 1094static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1095 show_fc_vport_##field, NULL)
1096
1097#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1098 fc_private_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1099static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1100 show_fc_vport_##field, NULL)
1101
1102#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1103 fc_private_vport_show_function(field, format_string, sz, ) \
1104 fc_private_vport_store_u32_function(field) \
ee959b00 1105static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1106 show_fc_vport_##field, \
1107 store_fc_vport_##field)
1108
1109
1110#define fc_private_vport_rd_enum_attr(title, maxlen) \
1111static ssize_t \
ee959b00
TJ		 1112show_fc_vport_##title (struct device *dev, \
1113 struct device_attribute *attr, \
1114 char *buf) \
a53eb5e0 1115{ \
ee959b00 1116 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1117 const char *name; \
1118 name = get_fc_##title##_name(vport->title); \
1119 if (!name) \
1120 return -EINVAL; \
1121 return snprintf(buf, maxlen, "%s\n", name); \
1122} \
ee959b00 1123static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
a53eb5e0
JS		 1124 show_fc_vport_##title, NULL)
1125
1126
1127#define SETUP_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1128 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1129 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1130 i->private_vport_attrs[count].store = NULL; \
1131 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1132 if (i->f->get_##field) \
1133 count++
1134 /* NOTE: Above MACRO differs: checks function not show bit */
1135
1136#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1137 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1138 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1139 i->private_vport_attrs[count].store = NULL; \
1140 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1141 count++
1142
1143#define SETUP_VPORT_ATTRIBUTE_WR(field) \
ee959b00 1144 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1145 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1146 if (i->f->field) \
1147 count++
1148 /* NOTE: Above MACRO differs: checks function */
1149
1150#define SETUP_VPORT_ATTRIBUTE_RW(field) \
ee959b00 1151 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1152 if (!i->f->set_vport_##field) { \
1153 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1154 i->private_vport_attrs[count].store = NULL; \
1155 } \
1156 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1157 count++
1158 /* NOTE: Above MACRO differs: does not check show bit */
1159
1160#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1161{ \
ee959b00 1162 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1163 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1164 count++; \
1165}
1166
1167
1168/* The FC Transport Virtual Port Attributes: */
1169
1170/* Fixed Virtual Port Attributes */
1171
1172/* Dynamic Virtual Port Attributes */
1173
1174/* Private Virtual Port Attributes */
1175
1176fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1177fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1178fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1179fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1180
1181static ssize_t
ee959b00
TJ		 1182show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1183 char *buf)
a53eb5e0 1184{
ee959b00 1185 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1186
1187 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1188 return snprintf(buf, 20, "unknown\n");
1189 return get_fc_port_roles_names(vport->roles, buf);
1190}
ee959b00 1191static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
a53eb5e0
JS		 1192
1193fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1194
1195fc_private_vport_show_function(symbolic_name, "%s\n",
1196 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1197fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
ee959b00 1198static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
a53eb5e0
JS		 1199 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1200
1201static ssize_t
ee959b00
TJ		 1202store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1203 const char *buf, size_t count)
a53eb5e0 1204{
ee959b00 1205 struct fc_vport *vport = transport_class_to_vport(dev);
9ef3e4a4 1206 struct Scsi_Host *shost = vport_to_shost(vport);
a53eb5e0 1207
9ef3e4a4 1208 fc_queue_work(shost, &vport->vport_delete_work);
a53eb5e0
JS		 1209 return count;
1210}
ee959b00 1211static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
a53eb5e0
JS		 1212 NULL, store_fc_vport_delete);
1213
1214
1215/*
1216 * Enable/Disable vport
1217 * Write "1" to disable, write "0" to enable
1218 */
1219static ssize_t
ee959b00
TJ		 1220store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1221 const char *buf,
a53eb5e0
JS		 1222 size_t count)
1223{
ee959b00 1224 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1225 struct Scsi_Host *shost = vport_to_shost(vport);
1226 struct fc_internal *i = to_fc_internal(shost->transportt);
1227 int stat;
1228
1229 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1230 return -EBUSY;
1231
1232 if (*buf == '0') {
1233 if (vport->vport_state != FC_VPORT_DISABLED)
1234 return -EALREADY;
1235 } else if (*buf == '1') {
1236 if (vport->vport_state == FC_VPORT_DISABLED)
1237 return -EALREADY;
1238 } else
1239 return -EINVAL;
1240
1241 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1242 return stat ? stat : count;
1243}
ee959b00 1244static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
a53eb5e0
JS		 1245 NULL, store_fc_vport_disable);
1246
1247
1da177e4
LT		 1248/*
1249 * Host Attribute Management
1250 */
1251
1252#define fc_host_show_function(field, format_string, sz, cast) \
1253static ssize_t \
ee959b00
TJ		 1254show_fc_host_##field (struct device *dev, \
1255 struct device_attribute *attr, char *buf) \
1da177e4 1256{ \
ee959b00 1257 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1258 struct fc_internal *i = to_fc_internal(shost->transportt); \
1259 if (i->f->get_host_##field) \
1260 i->f->get_host_##field(shost); \
1261 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1262}
1263
1264#define fc_host_store_function(field) \
1265static ssize_t \
ee959b00
TJ		 1266store_fc_host_##field(struct device *dev, \
1267 struct device_attribute *attr, \
1268 const char *buf, size_t count) \
1da177e4
LT		 1269{ \
1270 int val; \
ee959b00 1271 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4 1272 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 1273 char *cp; \
1da177e4 1274 \
0f29b966
JS		 1275 val = simple_strtoul(buf, &cp, 0); \
1276 if (*cp && (*cp != '\n')) \
1277 return -EINVAL; \
1da177e4
LT		 1278 i->f->set_host_##field(shost, val); \
1279 return count; \
1280}
1281
b8d08210
JS		 1282#define fc_host_store_str_function(field, slen) \
1283static ssize_t \
ee959b00
TJ		 1284store_fc_host_##field(struct device *dev, \
1285 struct device_attribute *attr, \
1286 const char *buf, size_t count) \
b8d08210 1287{ \
ee959b00 1288 struct Scsi_Host *shost = transport_class_to_shost(dev); \
b8d08210
JS		 1289 struct fc_internal *i = to_fc_internal(shost->transportt); \
1290 unsigned int cnt=count; \
1291 \
1292 /* count may include a LF at end of string */ \
1293 if (buf[cnt-1] == '\n') \
1294 cnt--; \
1295 if (cnt > ((slen) - 1)) \
1296 return -EINVAL; \
1297 memcpy(fc_host_##field(shost), buf, cnt); \
1298 i->f->set_host_##field(shost); \
1299 return count; \
1300}
1301
1da177e4
LT		 1302#define fc_host_rd_attr(field, format_string, sz) \
1303 fc_host_show_function(field, format_string, sz, ) \
ee959b00 1304static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1305 show_fc_host_##field, NULL)
1306
1307#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1308 fc_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1309static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1310 show_fc_host_##field, NULL)
1311
1312#define fc_host_rw_attr(field, format_string, sz) \
1313 fc_host_show_function(field, format_string, sz, ) \
1314 fc_host_store_function(field) \
ee959b00 1315static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 1316 show_fc_host_##field, \
1317 store_fc_host_##field)
1318
1319#define fc_host_rd_enum_attr(title, maxlen) \
1320static ssize_t \
ee959b00
TJ		 1321show_fc_host_##title (struct device *dev, \
1322 struct device_attribute *attr, char *buf) \
1da177e4 1323{ \
ee959b00 1324 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1325 struct fc_internal *i = to_fc_internal(shost->transportt); \
1326 const char *name; \
1327 if (i->f->get_host_##title) \
1328 i->f->get_host_##title(shost); \
1329 name = get_fc_##title##_name(fc_host_##title(shost)); \
1330 if (!name) \
1331 return -EINVAL; \
1332 return snprintf(buf, maxlen, "%s\n", name); \
1333} \
ee959b00 1334static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1da177e4
LT		 1335
1336#define SETUP_HOST_ATTRIBUTE_RD(field) \
ee959b00 1337 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1338 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1339 i->private_host_attrs[count].store = NULL; \
1340 i->host_attrs[count] = &i->private_host_attrs[count]; \
1341 if (i->f->show_host_##field) \
1342 count++
1343
a53eb5e0 1344#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
ee959b00 1345 i->private_host_attrs[count] = device_attr_host_##field; \
a53eb5e0
JS		 1346 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1347 i->private_host_attrs[count].store = NULL; \
1348 i->host_attrs[count] = &i->private_host_attrs[count]; \
1349 count++
1350
1da177e4 1351#define SETUP_HOST_ATTRIBUTE_RW(field) \
ee959b00 1352 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1353 if (!i->f->set_host_##field) { \
1354 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1355 i->private_host_attrs[count].store = NULL; \
1356 } \
1357 i->host_attrs[count] = &i->private_host_attrs[count]; \
1358 if (i->f->show_host_##field) \
1359 count++
1360
1361
1362#define fc_private_host_show_function(field, format_string, sz, cast) \
1363static ssize_t \
ee959b00
TJ		 1364show_fc_host_##field (struct device *dev, \
1365 struct device_attribute *attr, char *buf) \
1da177e4 1366{ \
ee959b00 1367 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1368 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1369}
1370
1371#define fc_private_host_rd_attr(field, format_string, sz) \
1372 fc_private_host_show_function(field, format_string, sz, ) \
ee959b00 1373static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1374 show_fc_host_##field, NULL)
1375
1376#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1377 fc_private_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1378static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1379 show_fc_host_##field, NULL)
1380
1381#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
ee959b00 1382 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1383 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1384 i->private_host_attrs[count].store = NULL; \
1385 i->host_attrs[count] = &i->private_host_attrs[count]; \
1386 count++
1387
1388#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
91ca7b01 1389{ \
ee959b00 1390 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4 1391 i->host_attrs[count] = &i->private_host_attrs[count]; \
91ca7b01
AV		 1392 count++; \
1393}
1da177e4
LT		 1394
1395
1396/* Fixed Host Attributes */
1397
1398static ssize_t
ee959b00
TJ		 1399show_fc_host_supported_classes (struct device *dev,
1400 struct device_attribute *attr, char *buf)
1da177e4 1401{
ee959b00 1402 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1403
1404 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1405 return snprintf(buf, 20, "unspecified\n");
1406
1407 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1408}
ee959b00 1409static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1da177e4
LT		 1410 show_fc_host_supported_classes, NULL);
1411
1412static ssize_t
ee959b00
TJ		 1413show_fc_host_supported_fc4s (struct device *dev,
1414 struct device_attribute *attr, char *buf)
1da177e4 1415{
ee959b00 1416 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1417 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1418}
ee959b00 1419static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1da177e4
LT		 1420 show_fc_host_supported_fc4s, NULL);
1421
1422static ssize_t
ee959b00
TJ		 1423show_fc_host_supported_speeds (struct device *dev,
1424 struct device_attribute *attr, char *buf)
1da177e4 1425{
ee959b00 1426 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1427
1428 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1429 return snprintf(buf, 20, "unknown\n");
1430
1431 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1432}
ee959b00 1433static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1da177e4
LT		 1434 show_fc_host_supported_speeds, NULL);
1435
1436
1437fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1438fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
6b7281d0
AH		 1439fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1440 unsigned long long);
1da177e4 1441fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
a53eb5e0 1442fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1da177e4
LT		 1443fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1444
1445
1446/* Dynamic Host Attributes */
1447
1448static ssize_t
ee959b00
TJ		 1449show_fc_host_active_fc4s (struct device *dev,
1450 struct device_attribute *attr, char *buf)
1da177e4 1451{
ee959b00 1452 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1453 struct fc_internal *i = to_fc_internal(shost->transportt);
1454
1455 if (i->f->get_host_active_fc4s)
1456 i->f->get_host_active_fc4s(shost);
1457
1458 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1459}
ee959b00 1460static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1da177e4
LT		 1461 show_fc_host_active_fc4s, NULL);
1462
1463static ssize_t
ee959b00
TJ		 1464show_fc_host_speed (struct device *dev,
1465 struct device_attribute *attr, char *buf)
1da177e4 1466{
ee959b00 1467 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1468 struct fc_internal *i = to_fc_internal(shost->transportt);
1469
1470 if (i->f->get_host_speed)
1471 i->f->get_host_speed(shost);
1472
1473 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1474 return snprintf(buf, 20, "unknown\n");
1475
1476 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1477}
ee959b00 1478static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1da177e4
LT		 1479 show_fc_host_speed, NULL);
1480
1481
1482fc_host_rd_attr(port_id, "0x%06x\n", 20);
1483fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1484fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1485fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
016131b8 1486fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1da177e4 1487
b8d08210
JS		 1488fc_private_host_show_function(system_hostname, "%s\n",
1489 FC_SYMBOLIC_NAME_SIZE + 1, )
1490fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
ee959b00 1491static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
b8d08210
JS		 1492 show_fc_host_system_hostname, store_fc_host_system_hostname);
1493
1da177e4
LT		 1494
1495/* Private Host Attributes */
1496
1497static ssize_t
ee959b00
TJ		 1498show_fc_private_host_tgtid_bind_type(struct device *dev,
1499 struct device_attribute *attr, char *buf)
1da177e4 1500{
ee959b00 1501 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1502 const char *name;
1503
1504 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1505 if (!name)
1506 return -EINVAL;
1507 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1508}
1509
d16794f6
JSEC		 1510#define get_list_head_entry(pos, head, member) \
1511 pos = list_entry((head)->next, typeof(*pos), member)
1512
1da177e4 1513static ssize_t
ee959b00
TJ		 1514store_fc_private_host_tgtid_bind_type(struct device *dev,
1515 struct device_attribute *attr, const char *buf, size_t count)
1da177e4 1516{
ee959b00 1517 struct Scsi_Host *shost = transport_class_to_shost(dev);
d16794f6 1518 struct fc_rport *rport;
1da177e4
LT		 1519 enum fc_tgtid_binding_type val;
1520 unsigned long flags;
1521
1522 if (get_fc_tgtid_bind_type_match(buf, &val))
1523 return -EINVAL;
1524
1525 /* if changing bind type, purge all unused consistent bindings */
1526 if (val != fc_host_tgtid_bind_type(shost)) {
1527 spin_lock_irqsave(shost->host_lock, flags);
d16794f6
JSEC		 1528 while (!list_empty(&fc_host_rport_bindings(shost))) {
1529 get_list_head_entry(rport,
1530 &fc_host_rport_bindings(shost), peers);
aedf3497
JS		 1531 list_del(&rport->peers);
1532 rport->port_state = FC_PORTSTATE_DELETED;
1533 fc_queue_work(shost, &rport->rport_delete_work);
d16794f6 1534 }
1da177e4
LT		 1535 spin_unlock_irqrestore(shost->host_lock, flags);
1536 }
1537
1538 fc_host_tgtid_bind_type(shost) = val;
1539 return count;
1540}
1541
ee959b00 1542static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1da177e4
LT		 1543 show_fc_private_host_tgtid_bind_type,
1544 store_fc_private_host_tgtid_bind_type);
1545
91ca7b01 1546static ssize_t
ee959b00
TJ		 1547store_fc_private_host_issue_lip(struct device *dev,
1548 struct device_attribute *attr, const char *buf, size_t count)
91ca7b01 1549{
ee959b00 1550 struct Scsi_Host *shost = transport_class_to_shost(dev);
91ca7b01
AV		 1551 struct fc_internal *i = to_fc_internal(shost->transportt);
1552 int ret;
1553
1554 /* ignore any data value written to the attribute */
1555 if (i->f->issue_fc_host_lip) {
1556 ret = i->f->issue_fc_host_lip(shost);
1557 return ret ? ret: count;
1558 }
1559
1560 return -ENOENT;
1561}
1562
ee959b00 1563static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
91ca7b01
AV		 1564 store_fc_private_host_issue_lip);
1565
a53eb5e0
JS		 1566fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1567
1568
1da177e4
LT		 1569/*
1570 * Host Statistics Management
1571 */
1572
1573/* Show a given an attribute in the statistics group */
1574static ssize_t
ee959b00 1575fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1da177e4 1576{
ee959b00 1577 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1578 struct fc_internal *i = to_fc_internal(shost->transportt);
1579 struct fc_host_statistics *stats;
1580 ssize_t ret = -ENOENT;
1581
1582 if (offset > sizeof(struct fc_host_statistics) ||
1583 offset % sizeof(u64) != 0)
1584 WARN_ON(1);
1585
1586 if (i->f->get_fc_host_stats) {
1587 stats = (i->f->get_fc_host_stats)(shost);
1588 if (stats)
1589 ret = snprintf(buf, 20, "0x%llx\n",
1590 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1591 }
1592 return ret;
1593}
1594
1595
1596/* generate a read-only statistics attribute */
1597#define fc_host_statistic(name) \
ee959b00
TJ		 1598static ssize_t show_fcstat_##name(struct device *cd, \
1599 struct device_attribute *attr, \
1600 char *buf) \
1da177e4
LT		 1601{ \
1602 return fc_stat_show(cd, buf, \
1603 offsetof(struct fc_host_statistics, name)); \
1604} \
ee959b00 1605static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1da177e4
LT		 1606
1607fc_host_statistic(seconds_since_last_reset);
1608fc_host_statistic(tx_frames);
1609fc_host_statistic(tx_words);
1610fc_host_statistic(rx_frames);
1611fc_host_statistic(rx_words);
1612fc_host_statistic(lip_count);
1613fc_host_statistic(nos_count);
1614fc_host_statistic(error_frames);
1615fc_host_statistic(dumped_frames);
1616fc_host_statistic(link_failure_count);
1617fc_host_statistic(loss_of_sync_count);
1618fc_host_statistic(loss_of_signal_count);
1619fc_host_statistic(prim_seq_protocol_err_count);
1620fc_host_statistic(invalid_tx_word_count);
1621fc_host_statistic(invalid_crc_count);
1622fc_host_statistic(fcp_input_requests);
1623fc_host_statistic(fcp_output_requests);
1624fc_host_statistic(fcp_control_requests);
1625fc_host_statistic(fcp_input_megabytes);
1626fc_host_statistic(fcp_output_megabytes);
1627
1628static ssize_t
ee959b00
TJ		 1629fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1630 const char *buf, size_t count)
1da177e4 1631{
ee959b00 1632 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1633 struct fc_internal *i = to_fc_internal(shost->transportt);
1634
1635 /* ignore any data value written to the attribute */
1636 if (i->f->reset_fc_host_stats) {
1637 i->f->reset_fc_host_stats(shost);
1638 return count;
1639 }
1640
1641 return -ENOENT;
1642}
ee959b00 1643static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1da177e4
LT		 1644 fc_reset_statistics);
1645
1da177e4 1646static struct attribute *fc_statistics_attrs[] = {
ee959b00
TJ		 1647 &device_attr_host_seconds_since_last_reset.attr,
1648 &device_attr_host_tx_frames.attr,
1649 &device_attr_host_tx_words.attr,
1650 &device_attr_host_rx_frames.attr,
1651 &device_attr_host_rx_words.attr,
1652 &device_attr_host_lip_count.attr,
1653 &device_attr_host_nos_count.attr,
1654 &device_attr_host_error_frames.attr,
1655 &device_attr_host_dumped_frames.attr,
1656 &device_attr_host_link_failure_count.attr,
1657 &device_attr_host_loss_of_sync_count.attr,
1658 &device_attr_host_loss_of_signal_count.attr,
1659 &device_attr_host_prim_seq_protocol_err_count.attr,
1660 &device_attr_host_invalid_tx_word_count.attr,
1661 &device_attr_host_invalid_crc_count.attr,
1662 &device_attr_host_fcp_input_requests.attr,
1663 &device_attr_host_fcp_output_requests.attr,
1664 &device_attr_host_fcp_control_requests.attr,
1665 &device_attr_host_fcp_input_megabytes.attr,
1666 &device_attr_host_fcp_output_megabytes.attr,
1667 &device_attr_host_reset_statistics.attr,
1da177e4
LT		 1668 NULL
1669};
1670
1671static struct attribute_group fc_statistics_group = {
1672 .name = "statistics",
1673 .attrs = fc_statistics_attrs,
1674};
1675
a53eb5e0
JS		 1676
1677/* Host Vport Attributes */
1678
1679static int
1680fc_parse_wwn(const char *ns, u64 *nm)
1681{
1682 unsigned int i, j;
1683 u8 wwn[8];
1684
1685 memset(wwn, 0, sizeof(wwn));
1686
1687 /* Validate and store the new name */
1688 for (i=0, j=0; i < 16; i++) {
1689 if ((*ns >= 'a') && (*ns <= 'f'))
1690 j = ((j << 4) | ((*ns++ -'a') + 10));
1691 else if ((*ns >= 'A') && (*ns <= 'F'))
1692 j = ((j << 4) | ((*ns++ -'A') + 10));
1693 else if ((*ns >= '0') && (*ns <= '9'))
1694 j = ((j << 4) | (*ns++ -'0'));
1695 else
1696 return -EINVAL;
1697 if (i % 2) {
1698 wwn[i/2] = j & 0xff;
1699 j = 0;
1700 }
1701 }
1702
1703 *nm = wwn_to_u64(wwn);
1704
1705 return 0;
1706}
1707
1708
1709/*
1710 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1711 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1712 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1713 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1714 */
1715static ssize_t
ee959b00
TJ		 1716store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1717 const char *buf, size_t count)
a53eb5e0 1718{
ee959b00 1719 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1720 struct fc_vport_identifiers vid;
1721 struct fc_vport *vport;
1722 unsigned int cnt=count;
1723 int stat;
1724
1725 memset(&vid, 0, sizeof(vid));
1726
1727 /* count may include a LF at end of string */
1728 if (buf[cnt-1] == '\n')
1729 cnt--;
1730
1731 /* validate we have enough characters for WWPN */
1732 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1733 return -EINVAL;
1734
1735 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1736 if (stat)
1737 return stat;
1738
1739 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1740 if (stat)
1741 return stat;
1742
1743 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1744 vid.vport_type = FC_PORTTYPE_NPIV;
1745 /* vid.symbolic_name is already zero/NULL's */
1746 vid.disable = false; /* always enabled */
1747
1748 /* we only allow support on Channel 0 !!! */
a30c3f69 1749 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
a53eb5e0
JS		 1750 return stat ? stat : count;
1751}
ee959b00 1752static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
a53eb5e0
JS		 1753 store_fc_host_vport_create);
1754
1755
1756/*
1757 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1758 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1759 * The WWNs are specified as hex characters, and may *not* contain
1760 * any prefixes (e.g. 0x, x, etc)
1761 */
1762static ssize_t
ee959b00
TJ		 1763store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1764 const char *buf, size_t count)
a53eb5e0 1765{
ee959b00 1766 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1767 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1768 struct fc_vport *vport;
1769 u64 wwpn, wwnn;
1770 unsigned long flags;
1771 unsigned int cnt=count;
1772 int stat, match;
1773
1774 /* count may include a LF at end of string */
1775 if (buf[cnt-1] == '\n')
1776 cnt--;
1777
1778 /* validate we have enough characters for WWPN */
1779 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1780 return -EINVAL;
1781
1782 stat = fc_parse_wwn(&buf[0], &wwpn);
1783 if (stat)
1784 return stat;
1785
1786 stat = fc_parse_wwn(&buf[17], &wwnn);
1787 if (stat)
1788 return stat;
1789
1790 spin_lock_irqsave(shost->host_lock, flags);
1791 match = 0;
1792 /* we only allow support on Channel 0 !!! */
1793 list_for_each_entry(vport, &fc_host->vports, peers) {
1794 if ((vport->channel == 0) &&
1795 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1796 match = 1;
1797 break;
1798 }
1799 }
1800 spin_unlock_irqrestore(shost->host_lock, flags);
1801
1802 if (!match)
1803 return -ENODEV;
1804
1805 stat = fc_vport_terminate(vport);
1806 return stat ? stat : count;
1807}
ee959b00 1808static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
a53eb5e0
JS		 1809 store_fc_host_vport_delete);
1810
1811
1da177e4
LT		 1812static int fc_host_match(struct attribute_container *cont,
1813 struct device *dev)
1814{
1815 struct Scsi_Host *shost;
1816 struct fc_internal *i;
1817
1818 if (!scsi_is_host_device(dev))
1819 return 0;
1820
1821 shost = dev_to_shost(dev);
1822 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1823 != &fc_host_class.class)
1824 return 0;
1825
1826 i = to_fc_internal(shost->transportt);
1827
1828 return &i->t.host_attrs.ac == cont;
1829}
1830
1831static int fc_target_match(struct attribute_container *cont,
1832 struct device *dev)
1833{
1834 struct Scsi_Host *shost;
1835 struct fc_internal *i;
1836
1837 if (!scsi_is_target_device(dev))
1838 return 0;
1839
1840 shost = dev_to_shost(dev->parent);
1841 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1842 != &fc_host_class.class)
1843 return 0;
1844
1845 i = to_fc_internal(shost->transportt);
1846
1847 return &i->t.target_attrs.ac == cont;
1848}
1849
1850static void fc_rport_dev_release(struct device *dev)
1851{
1852 struct fc_rport *rport = dev_to_rport(dev);
1853 put_device(dev->parent);
1854 kfree(rport);
1855}
1856
1857int scsi_is_fc_rport(const struct device *dev)
1858{
1859 return dev->release == fc_rport_dev_release;
1860}
1861EXPORT_SYMBOL(scsi_is_fc_rport);
1862
1863static int fc_rport_match(struct attribute_container *cont,
1864 struct device *dev)
1865{
1866 struct Scsi_Host *shost;
1867 struct fc_internal *i;
1868
1869 if (!scsi_is_fc_rport(dev))
1870 return 0;
1871
1872 shost = dev_to_shost(dev->parent);
1873 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1874 != &fc_host_class.class)
1875 return 0;
1876
1877 i = to_fc_internal(shost->transportt);
1878
1879 return &i->rport_attr_cont.ac == cont;
1880}
1881
5c44cd2a 1882
a53eb5e0
JS		 1883static void fc_vport_dev_release(struct device *dev)
1884{
1885 struct fc_vport *vport = dev_to_vport(dev);
1886 put_device(dev->parent); /* release kobj parent */
1887 kfree(vport);
1888}
1889
1890int scsi_is_fc_vport(const struct device *dev)
1891{
1892 return dev->release == fc_vport_dev_release;
1893}
1894EXPORT_SYMBOL(scsi_is_fc_vport);
1895
1896static int fc_vport_match(struct attribute_container *cont,
1897 struct device *dev)
1898{
1899 struct fc_vport *vport;
1900 struct Scsi_Host *shost;
1901 struct fc_internal *i;
1902
1903 if (!scsi_is_fc_vport(dev))
1904 return 0;
1905 vport = dev_to_vport(dev);
1906
1907 shost = vport_to_shost(vport);
1908 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1909 != &fc_host_class.class)
1910 return 0;
1911
1912 i = to_fc_internal(shost->transportt);
1913 return &i->vport_attr_cont.ac == cont;
1914}
1915
1916
c829c394
JS		 1917/**
1918 * fc_timed_out - FC Transport I/O timeout intercept handler
c829c394
JS		 1919 * @scmd: The SCSI command which timed out
1920 *
1921 * This routine protects against error handlers getting invoked while a
1922 * rport is in a blocked state, typically due to a temporarily loss of
1923 * connectivity. If the error handlers are allowed to proceed, requests
1924 * to abort i/o, reset the target, etc will likely fail as there is no way
1925 * to communicate with the device to perform the requested function. These
1926 * failures may result in the midlayer taking the device offline, requiring
1927 * manual intervention to restore operation.
1928 *
1929 * This routine, called whenever an i/o times out, validates the state of
1930 * the underlying rport. If the rport is blocked, it returns
1931 * EH_RESET_TIMER, which will continue to reschedule the timeout.
1932 * Eventually, either the device will return, or devloss_tmo will fire,
1933 * and when the timeout then fires, it will be handled normally.
1934 * If the rport is not blocked, normal error handling continues.
1935 *
1936 * Notes:
1937 * This routine assumes no locks are held on entry.
eb44820c 1938 */
242f9dcb 1939static enum blk_eh_timer_return
c829c394
JS		 1940fc_timed_out(struct scsi_cmnd *scmd)
1941{
1942 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
1943
1944 if (rport->port_state == FC_PORTSTATE_BLOCKED)
242f9dcb 1945 return BLK_EH_RESET_TIMER;
c829c394 1946
242f9dcb 1947 return BLK_EH_NOT_HANDLED;
c829c394
JS		 1948}
1949
5c44cd2a 1950/*
bda23253
JS		 1951 * Called by fc_user_scan to locate an rport on the shost that
1952 * matches the channel and target id, and invoke scsi_scan_target()
1953 * on the rport.
5c44cd2a 1954 */
bda23253
JS		 1955static void
1956fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
5c44cd2a
JSEC		 1957{
1958 struct fc_rport *rport;
bda23253
JS		 1959 unsigned long flags;
1960
1961 spin_lock_irqsave(shost->host_lock, flags);
5c44cd2a 1962
e02f3f59
CH		 1963 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1964 if (rport->scsi_target_id == -1)
1965 continue;
5c44cd2a 1966
0d2fcd9f
HR		 1967 if (rport->port_state != FC_PORTSTATE_ONLINE)
1968 continue;
1969
bda23253
JS		 1970 if ((channel == rport->channel) &&
1971 (id == rport->scsi_target_id)) {
1972 spin_unlock_irqrestore(shost->host_lock, flags);
1973 scsi_scan_target(&rport->dev, channel, id, lun, 1);
1974 return;
e02f3f59
CH		 1975 }
1976 }
1977
bda23253
JS		 1978 spin_unlock_irqrestore(shost->host_lock, flags);
1979}
1980
1981/*
1982 * Called via sysfs scan routines. Necessary, as the FC transport
1983 * wants to place all target objects below the rport object. So this
1984 * routine must invoke the scsi_scan_target() routine with the rport
1985 * object as the parent.
1986 */
1987static int
1988fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
1989{
1990 uint chlo, chhi;
1991 uint tgtlo, tgthi;
1992
1993 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
1994 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
1995 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
1996 return -EINVAL;
1997
1998 if (channel == SCAN_WILD_CARD) {
1999 chlo = 0;
2000 chhi = shost->max_channel + 1;
2001 } else {
2002 chlo = channel;
2003 chhi = channel + 1;
2004 }
2005
2006 if (id == SCAN_WILD_CARD) {
2007 tgtlo = 0;
2008 tgthi = shost->max_id;
2009 } else {
2010 tgtlo = id;
2011 tgthi = id + 1;
2012 }
2013
2014 for ( ; chlo < chhi; chlo++)
2015 for ( ; tgtlo < tgthi; tgtlo++)
2016 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2017
e02f3f59 2018 return 0;
5c44cd2a
JSEC		 2019}
2020
7525236d
FT		 2021static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2022 int result)
2023{
2024 struct fc_internal *i = to_fc_internal(shost->transportt);
2025 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2026}
2027
2028static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2029{
2030 struct fc_internal *i = to_fc_internal(shost->transportt);
2031 return i->f->it_nexus_response(shost, nexus, result);
2032}
2033
1da177e4
LT		 2034struct scsi_transport_template *
2035fc_attach_transport(struct fc_function_template *ft)
2036{
1da177e4 2037 int count;
24669f75
JS		 2038 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2039 GFP_KERNEL);
1da177e4
LT		 2040
2041 if (unlikely(!i))
2042 return NULL;
2043
1da177e4
LT		 2044 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2045 i->t.target_attrs.ac.class = &fc_transport_class.class;
2046 i->t.target_attrs.ac.match = fc_target_match;
2047 i->t.target_size = sizeof(struct fc_starget_attrs);
2048 transport_container_register(&i->t.target_attrs);
2049
2050 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2051 i->t.host_attrs.ac.class = &fc_host_class.class;
2052 i->t.host_attrs.ac.match = fc_host_match;
2053 i->t.host_size = sizeof(struct fc_host_attrs);
2054 if (ft->get_fc_host_stats)
2055 i->t.host_attrs.statistics = &fc_statistics_group;
2056 transport_container_register(&i->t.host_attrs);
2057
2058 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2059 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2060 i->rport_attr_cont.ac.match = fc_rport_match;
2061 transport_container_register(&i->rport_attr_cont);
2062
a53eb5e0
JS		 2063 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2064 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2065 i->vport_attr_cont.ac.match = fc_vport_match;
2066 transport_container_register(&i->vport_attr_cont);
2067
1da177e4
LT		 2068 i->f = ft;
2069
2070 /* Transport uses the shost workq for scsi scanning */
2071 i->t.create_work_queue = 1;
5c44cd2a 2072
c829c394
JS		 2073 i->t.eh_timed_out = fc_timed_out;
2074
e02f3f59 2075 i->t.user_scan = fc_user_scan;
9ef3e4a4 2076
7525236d
FT		 2077 /* target-mode drivers' functions */
2078 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2079 i->t.it_nexus_response = fc_it_nexus_response;
2080
1da177e4
LT		 2081 /*
2082 * Setup SCSI Target Attributes.
2083 */
2084 count = 0;
2085 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2086 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2087 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2088
2089 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2090
2091 i->starget_attrs[count] = NULL;
2092
2093
2094 /*
2095 * Setup SCSI Host Attributes.
2096 */
2097 count=0;
2098 SETUP_HOST_ATTRIBUTE_RD(node_name);
2099 SETUP_HOST_ATTRIBUTE_RD(port_name);
6b7281d0 2100 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1da177e4
LT		 2101 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2102 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1da177e4
LT		 2103 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2104 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
a53eb5e0
JS		 2105 if (ft->vport_create) {
2106 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2107 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2108 }
1da177e4
LT		 2109 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2110
2111 SETUP_HOST_ATTRIBUTE_RD(port_id);
2112 SETUP_HOST_ATTRIBUTE_RD(port_type);
2113 SETUP_HOST_ATTRIBUTE_RD(port_state);
2114 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2115 SETUP_HOST_ATTRIBUTE_RD(speed);
2116 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
016131b8 2117 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
b8d08210 2118 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
1da177e4
LT		 2119
2120 /* Transport-managed attributes */
2121 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
91ca7b01
AV		 2122 if (ft->issue_fc_host_lip)
2123 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
a53eb5e0
JS		 2124 if (ft->vport_create)
2125 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2126 if (ft->vport_delete)
2127 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
1da177e4
LT		 2128
2129 BUG_ON(count > FC_HOST_NUM_ATTRS);
2130
2131 i->host_attrs[count] = NULL;
2132
2133 /*
2134 * Setup Remote Port Attributes.
2135 */
2136 count=0;
2137 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2138 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2139 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2140 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2141 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2142 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2143 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2144 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2145 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
fff9d40c 2146 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
1da177e4
LT		 2147
2148 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2149
2150 i->rport_attrs[count] = NULL;
2151
a53eb5e0
JS		 2152 /*
2153 * Setup Virtual Port Attributes.
2154 */
2155 count=0;
2156 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2157 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2158 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2159 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2160 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2161 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2162 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2163 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2164 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2165
2166 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2167
2168 i->vport_attrs[count] = NULL;
2169
1da177e4
LT		 2170 return &i->t;
2171}
2172EXPORT_SYMBOL(fc_attach_transport);
2173
2174void fc_release_transport(struct scsi_transport_template *t)
2175{
2176 struct fc_internal *i = to_fc_internal(t);
2177
2178 transport_container_unregister(&i->t.target_attrs);
2179 transport_container_unregister(&i->t.host_attrs);
2180 transport_container_unregister(&i->rport_attr_cont);
a53eb5e0 2181 transport_container_unregister(&i->vport_attr_cont);
1da177e4
LT		 2182
2183 kfree(i);
2184}
2185EXPORT_SYMBOL(fc_release_transport);
2186
aedf3497
JS		 2187/**
2188 * fc_queue_work - Queue work to the fc_host workqueue.
2189 * @shost: Pointer to Scsi_Host bound to fc_host.
2190 * @work: Work to queue for execution.
2191 *
2192 * Return value:
a0785edf
JS		 2193 * 1 - work queued for execution
2194 * 0 - work is already queued
2195 * -EINVAL - work queue doesn't exist
eb44820c 2196 */
aedf3497
JS		 2197static int
2198fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2199{
2200 if (unlikely(!fc_host_work_q(shost))) {
2201 printk(KERN_ERR
2202 "ERROR: FC host '%s' attempted to queue work, "
2203 "when no workqueue created.\n", shost->hostt->name);
2204 dump_stack();
2205
2206 return -EINVAL;
2207 }
2208
2209 return queue_work(fc_host_work_q(shost), work);
2210}
2211
2212/**
2213 * fc_flush_work - Flush a fc_host's workqueue.
2214 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2215 */
aedf3497
JS		 2216static void
2217fc_flush_work(struct Scsi_Host *shost)
2218{
2219 if (!fc_host_work_q(shost)) {
2220 printk(KERN_ERR
2221 "ERROR: FC host '%s' attempted to flush work, "
2222 "when no workqueue created.\n", shost->hostt->name);
2223 dump_stack();
2224 return;
2225 }
2226
2227 flush_workqueue(fc_host_work_q(shost));
2228}
2229
2230/**
2231 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2232 * @shost: Pointer to Scsi_Host bound to fc_host.
2233 * @work: Work to queue for execution.
2234 * @delay: jiffies to delay the work queuing
2235 *
2236 * Return value:
0f29b966 2237 * 1 on success / 0 already queued / < 0 for error
eb44820c 2238 */
aedf3497 2239static int
c4028958 2240fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
aedf3497
JS		 2241 unsigned long delay)
2242{
2243 if (unlikely(!fc_host_devloss_work_q(shost))) {
2244 printk(KERN_ERR
2245 "ERROR: FC host '%s' attempted to queue work, "
2246 "when no workqueue created.\n", shost->hostt->name);
2247 dump_stack();
2248
2249 return -EINVAL;
2250 }
2251
2252 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2253}
2254
2255/**
2256 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2257 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2258 */
aedf3497
JS		 2259static void
2260fc_flush_devloss(struct Scsi_Host *shost)
2261{
2262 if (!fc_host_devloss_work_q(shost)) {
2263 printk(KERN_ERR
2264 "ERROR: FC host '%s' attempted to flush work, "
2265 "when no workqueue created.\n", shost->hostt->name);
2266 dump_stack();
2267 return;
2268 }
2269
2270 flush_workqueue(fc_host_devloss_work_q(shost));
2271}
2272
1da177e4
LT		 2273
2274/**
eb44820c
RL		 2275 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2276 * @shost: Which &Scsi_Host
1da177e4
LT		 2277 *
2278 * This routine is expected to be called immediately preceeding the
2279 * a driver's call to scsi_remove_host().
2280 *
2281 * WARNING: A driver utilizing the fc_transport, which fails to call
eb44820c 2282 * this routine prior to scsi_remove_host(), will leave dangling
1da177e4
LT		 2283 * objects in /sys/class/fc_remote_ports. Access to any of these
2284 * objects can result in a system crash !!!
2285 *
2286 * Notes:
2287 * This routine assumes no locks are held on entry.
eb44820c 2288 */
1da177e4
LT		 2289void
2290fc_remove_host(struct Scsi_Host *shost)
2291{
a53eb5e0
JS		 2292 struct fc_vport *vport = NULL, *next_vport = NULL;
2293 struct fc_rport *rport = NULL, *next_rport = NULL;
aedf3497
JS		 2294 struct workqueue_struct *work_q;
2295 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
a53eb5e0 2296 unsigned long flags;
a53eb5e0
JS		 2297
2298 spin_lock_irqsave(shost->host_lock, flags);
2299
2300 /* Remove any vports */
9ef3e4a4
JS		 2301 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2302 fc_queue_work(shost, &vport->vport_delete_work);
1da177e4
LT		 2303
2304 /* Remove any remote ports */
2305 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2306 &fc_host->rports, peers) {
2307 list_del(&rport->peers);
2308 rport->port_state = FC_PORTSTATE_DELETED;
2309 fc_queue_work(shost, &rport->rport_delete_work);
2310 }
2311
1da177e4 2312 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2313 &fc_host->rport_bindings, peers) {
2314 list_del(&rport->peers);
2315 rport->port_state = FC_PORTSTATE_DELETED;
2316 fc_queue_work(shost, &rport->rport_delete_work);
2317 }
2318
a53eb5e0
JS		 2319 spin_unlock_irqrestore(shost->host_lock, flags);
2320
aedf3497
JS		 2321 /* flush all scan work items */
2322 scsi_flush_work(shost);
2323
2324 /* flush all stgt delete, and rport delete work items, then kill it */
2325 if (fc_host->work_q) {
2326 work_q = fc_host->work_q;
2327 fc_host->work_q = NULL;
2328 destroy_workqueue(work_q);
2329 }
2330
2331 /* flush all devloss work items, then kill it */
2332 if (fc_host->devloss_work_q) {
2333 work_q = fc_host->devloss_work_q;
2334 fc_host->devloss_work_q = NULL;
2335 destroy_workqueue(work_q);
2336 }
1da177e4
LT		 2337}
2338EXPORT_SYMBOL(fc_remove_host);
2339
fff9d40c
MC		 2340static void fc_terminate_rport_io(struct fc_rport *rport)
2341{
2342 struct Scsi_Host *shost = rport_to_shost(rport);
2343 struct fc_internal *i = to_fc_internal(shost->transportt);
2344
2345 /* Involve the LLDD if possible to terminate all io on the rport. */
2346 if (i->f->terminate_rport_io)
2347 i->f->terminate_rport_io(rport);
2348
2349 /*
2350 * must unblock to flush queued IO. The caller will have set
2351 * the port_state or flags, so that fc_remote_port_chkready will
2352 * fail IO.
2353 */
2354 scsi_target_unblock(&rport->dev);
2355}
aedf3497
JS		 2356
2357/**
2358 * fc_starget_delete - called to delete the scsi decendents of an rport
c4028958 2359 * @work: remote port to be operated on.
eb44820c
RL		 2360 *
2361 * Deletes target and all sdevs.
2362 */
19a7b4ae 2363static void
c4028958 2364fc_starget_delete(struct work_struct *work)
19a7b4ae 2365{
c4028958
DH		 2366 struct fc_rport *rport =
2367 container_of(work, struct fc_rport, stgt_delete_work);
19a7b4ae 2368
fff9d40c 2369 fc_terminate_rport_io(rport);
19a7b4ae
JSEC		 2370 scsi_remove_target(&rport->dev);
2371}
2372
aedf3497
JS		 2373
2374/**
2375 * fc_rport_final_delete - finish rport termination and delete it.
c4028958 2376 * @work: remote port to be deleted.
eb44820c 2377 */
aedf3497 2378static void
c4028958 2379fc_rport_final_delete(struct work_struct *work)
aedf3497 2380{
c4028958
DH		 2381 struct fc_rport *rport =
2382 container_of(work, struct fc_rport, rport_delete_work);
aedf3497
JS		 2383 struct device *dev = &rport->dev;
2384 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2385 struct fc_internal *i = to_fc_internal(shost->transportt);
92740b24 2386 unsigned long flags;
8798a694 2387 int do_callback = 0;
aedf3497
JS		 2388
2389 /*
9ef3e4a4 2390 * if a scan is pending, flush the SCSI Host work_q so that
aedf3497
JS		 2391 * that we can reclaim the rport scan work element.
2392 */
2393 if (rport->flags & FC_RPORT_SCAN_PENDING)
2394 scsi_flush_work(shost);
2395
fff9d40c 2396 fc_terminate_rport_io(rport);
9e4f5e29 2397
92740b24
JS		 2398 /*
2399 * Cancel any outstanding timers. These should really exist
2400 * only when rmmod'ing the LLDD and we're asking for
2401 * immediate termination of the rports
2402 */
2403 spin_lock_irqsave(shost->host_lock, flags);
2404 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2405 spin_unlock_irqrestore(shost->host_lock, flags);
2406 if (!cancel_delayed_work(&rport->fail_io_work))
2407 fc_flush_devloss(shost);
2408 if (!cancel_delayed_work(&rport->dev_loss_work))
2409 fc_flush_devloss(shost);
2410 spin_lock_irqsave(shost->host_lock, flags);
2411 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2412 }
2413 spin_unlock_irqrestore(shost->host_lock, flags);
2414
0f29b966
JS		 2415 /* Delete SCSI target and sdevs */
2416 if (rport->scsi_target_id != -1)
c4028958 2417 fc_starget_delete(&rport->stgt_delete_work);
92740b24
JS		 2418
2419 /*
2420 * Notify the driver that the rport is now dead. The LLDD will
2421 * also guarantee that any communication to the rport is terminated
4be98c0c
JS		 2422 *
2423 * Avoid this call if we already called it when we preserved the
2424 * rport for the binding.
92740b24 2425 */
8798a694 2426 spin_lock_irqsave(shost->host_lock, flags);
4be98c0c 2427 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
8798a694
MR		 2428 (i->f->dev_loss_tmo_callbk)) {
2429 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2430 do_callback = 1;
2431 }
2432 spin_unlock_irqrestore(shost->host_lock, flags);
2433
2434 if (do_callback)
0f29b966 2435 i->f->dev_loss_tmo_callbk(rport);
0f29b966 2436
9e4f5e29
JS		 2437 fc_bsg_remove(rport->rqst_q);
2438
aedf3497
JS		 2439 transport_remove_device(dev);
2440 device_del(dev);
2441 transport_destroy_device(dev);
3bdad7bd
JS		 2442 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2443 put_device(dev); /* for self-reference */
aedf3497
JS		 2444}
2445
2446
1da177e4
LT		 2447/**
2448 * fc_rport_create - allocates and creates a remote FC port.
2449 * @shost: scsi host the remote port is connected to.
2450 * @channel: Channel on shost port connected to.
2451 * @ids: The world wide names, fc address, and FC4 port
2452 * roles for the remote port.
2453 *
2454 * Allocates and creates the remoter port structure, including the
2455 * class and sysfs creation.
2456 *
2457 * Notes:
2458 * This routine assumes no locks are held on entry.
eb44820c 2459 */
44818efb 2460static struct fc_rport *
1da177e4
LT		 2461fc_rport_create(struct Scsi_Host *shost, int channel,
2462 struct fc_rport_identifiers *ids)
2463{
aedf3497 2464 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2465 struct fc_internal *fci = to_fc_internal(shost->transportt);
2466 struct fc_rport *rport;
2467 struct device *dev;
2468 unsigned long flags;
2469 int error;
2470 size_t size;
2471
2472 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
24669f75 2473 rport = kzalloc(size, GFP_KERNEL);
1da177e4 2474 if (unlikely(!rport)) {
cadbd4a5 2475 printk(KERN_ERR "%s: allocation failure\n", __func__);
1da177e4
LT		 2476 return NULL;
2477 }
1da177e4
LT		 2478
2479 rport->maxframe_size = -1;
2480 rport->supported_classes = FC_COS_UNSPECIFIED;
2481 rport->dev_loss_tmo = fc_dev_loss_tmo;
2482 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2483 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2484 rport->port_id = ids->port_id;
2485 rport->roles = ids->roles;
2486 rport->port_state = FC_PORTSTATE_ONLINE;
2487 if (fci->f->dd_fcrport_size)
2488 rport->dd_data = &rport[1];
2489 rport->channel = channel;
0f29b966 2490 rport->fast_io_fail_tmo = -1;
1da177e4 2491
c4028958
DH		 2492 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2493 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2494 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2495 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2496 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
1da177e4
LT		 2497
2498 spin_lock_irqsave(shost->host_lock, flags);
2499
2500 rport->number = fc_host->next_rport_number++;
a53eb5e0 2501 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
1da177e4
LT		 2502 rport->scsi_target_id = fc_host->next_target_id++;
2503 else
2504 rport->scsi_target_id = -1;
aedf3497 2505 list_add_tail(&rport->peers, &fc_host->rports);
3bdad7bd 2506 get_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 2507
2508 spin_unlock_irqrestore(shost->host_lock, flags);
2509
2510 dev = &rport->dev;
3bdad7bd
JS		 2511 device_initialize(dev); /* takes self reference */
2512 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
1da177e4 2513 dev->release = fc_rport_dev_release;
71610f55
KS		 2514 dev_set_name(dev, "rport-%d:%d-%d",
2515 shost->host_no, channel, rport->number);
1da177e4
LT		 2516 transport_setup_device(dev);
2517
2518 error = device_add(dev);
2519 if (error) {
2520 printk(KERN_ERR "FC Remote Port device_add failed\n");
2521 goto delete_rport;
2522 }
2523 transport_add_device(dev);
2524 transport_configure_device(dev);
2525
9e4f5e29
JS		 2526 fc_bsg_rportadd(shost, rport);
2527 /* ignore any bsg add error - we just can't do sgio */
2528
a53eb5e0 2529 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
1da177e4 2530 /* initiate a scan of the target */
aedf3497 2531 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2532 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2533 }
1da177e4
LT		 2534
2535 return rport;
2536
2537delete_rport:
2538 transport_destroy_device(dev);
1da177e4
LT		 2539 spin_lock_irqsave(shost->host_lock, flags);
2540 list_del(&rport->peers);
3bdad7bd 2541 put_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 2542 spin_unlock_irqrestore(shost->host_lock, flags);
2543 put_device(dev->parent);
2544 kfree(rport);
2545 return NULL;
2546}
2547
2548/**
eb44820c 2549 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
1da177e4
LT		 2550 * @shost: scsi host the remote port is connected to.
2551 * @channel: Channel on shost port connected to.
2552 * @ids: The world wide names, fc address, and FC4 port
2553 * roles for the remote port.
2554 *
2555 * The LLDD calls this routine to notify the transport of the existence
2556 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2557 * of the port, it's FC address (port_id), and the FC4 roles that are
2558 * active for the port.
2559 *
2560 * For ports that are FCP targets (aka scsi targets), the FC transport
2561 * maintains consistent target id bindings on behalf of the LLDD.
2562 * A consistent target id binding is an assignment of a target id to
2563 * a remote port identifier, which persists while the scsi host is
2564 * attached. The remote port can disappear, then later reappear, and
2565 * it's target id assignment remains the same. This allows for shifts
2566 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2567 * changes to the scsi subsystem which is based on scsi host number and
2568 * target id values. Bindings are only valid during the attachment of
2569 * the scsi host. If the host detaches, then later re-attaches, target
2570 * id bindings may change.
2571 *
2572 * This routine is responsible for returning a remote port structure.
2573 * The routine will search the list of remote ports it maintains
2574 * internally on behalf of consistent target id mappings. If found, the
2575 * remote port structure will be reused. Otherwise, a new remote port
2576 * structure will be allocated.
2577 *
2578 * Whenever a remote port is allocated, a new fc_remote_port class
2579 * device is created.
2580 *
2581 * Should not be called from interrupt context.
2582 *
2583 * Notes:
2584 * This routine assumes no locks are held on entry.
eb44820c 2585 */
1da177e4
LT		 2586struct fc_rport *
2587fc_remote_port_add(struct Scsi_Host *shost, int channel,
2588 struct fc_rport_identifiers *ids)
2589{
19a7b4ae 2590 struct fc_internal *fci = to_fc_internal(shost->transportt);
aedf3497 2591 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2592 struct fc_rport *rport;
2593 unsigned long flags;
2594 int match = 0;
2595
aedf3497
JS		 2596 /* ensure any stgt delete functions are done */
2597 fc_flush_work(shost);
2598
19a7b4ae
JSEC		 2599 /*
2600 * Search the list of "active" rports, for an rport that has been
2601 * deleted, but we've held off the real delete while the target
2602 * is in a "blocked" state.
2603 */
2604 spin_lock_irqsave(shost->host_lock, flags);
2605
aedf3497 2606 list_for_each_entry(rport, &fc_host->rports, peers) {
19a7b4ae
JSEC		 2607
2608 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2609 (rport->channel == channel)) {
2610
aedf3497 2611 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 2612 case FC_TGTID_BIND_BY_WWPN:
2613 case FC_TGTID_BIND_NONE:
2614 if (rport->port_name == ids->port_name)
2615 match = 1;
2616 break;
2617 case FC_TGTID_BIND_BY_WWNN:
2618 if (rport->node_name == ids->node_name)
2619 match = 1;
2620 break;
2621 case FC_TGTID_BIND_BY_ID:
2622 if (rport->port_id == ids->port_id)
2623 match = 1;
2624 break;
2625 }
2626
2627 if (match) {
19a7b4ae
JSEC		 2628
2629 memcpy(&rport->node_name, &ids->node_name,
2630 sizeof(rport->node_name));
2631 memcpy(&rport->port_name, &ids->port_name,
2632 sizeof(rport->port_name));
2633 rport->port_id = ids->port_id;
2634
2635 rport->port_state = FC_PORTSTATE_ONLINE;
2636 rport->roles = ids->roles;
2637
2638 spin_unlock_irqrestore(shost->host_lock, flags);
2639
2640 if (fci->f->dd_fcrport_size)
2641 memset(rport->dd_data, 0,
2642 fci->f->dd_fcrport_size);
2643
2644 /*
92740b24
JS		 2645 * If we were not a target, cancel the
2646 * io terminate and rport timers, and
2647 * we're done.
2648 *
2649 * If we were a target, but our new role
2650 * doesn't indicate a target, leave the
2651 * timers running expecting the role to
2652 * change as the target fully logs in. If
2653 * it doesn't, the target will be torn down.
2654 *
2655 * If we were a target, and our role shows
2656 * we're still a target, cancel the timers
2657 * and kick off a scan.
19a7b4ae 2658 */
19a7b4ae 2659
92740b24
JS		 2660 /* was a target, not in roles */
2661 if ((rport->scsi_target_id != -1) &&
a53eb5e0 2662 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
92740b24 2663 return rport;
19a7b4ae
JSEC		 2664
2665 /*
92740b24
JS		 2666 * Stop the fail io and dev_loss timers.
2667 * If they flush, the port_state will
2668 * be checked and will NOOP the function.
19a7b4ae 2669 */
0f29b966
JS		 2670 if (!cancel_delayed_work(&rport->fail_io_work))
2671 fc_flush_devloss(shost);
92740b24 2672 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2673 fc_flush_devloss(shost);
2674
2675 spin_lock_irqsave(shost->host_lock, flags);
2676
fff9d40c 2677 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
4be98c0c
JS		 2678 FC_RPORT_DEVLOSS_PENDING |
2679 FC_RPORT_DEVLOSS_CALLBK_DONE);
19a7b4ae 2680
92740b24
JS		 2681 /* if target, initiate a scan */
2682 if (rport->scsi_target_id != -1) {
2683 rport->flags |= FC_RPORT_SCAN_PENDING;
2684 scsi_queue_work(shost,
2685 &rport->scan_work);
2686 spin_unlock_irqrestore(shost->host_lock,
2687 flags);
2688 scsi_target_unblock(&rport->dev);
2689 } else
2690 spin_unlock_irqrestore(shost->host_lock,
2691 flags);
a0785edf 2692
9e4f5e29
JS		 2693 fc_bsg_goose_queue(rport);
2694
19a7b4ae
JSEC		 2695 return rport;
2696 }
2697 }
2698 }
2699
92740b24
JS		 2700 /*
2701 * Search the bindings array
2702 * Note: if never a FCP target, you won't be on this list
2703 */
aedf3497 2704 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
1da177e4
LT		 2705
2706 /* search for a matching consistent binding */
2707
aedf3497 2708 list_for_each_entry(rport, &fc_host->rport_bindings,
1da177e4
LT		 2709 peers) {
2710 if (rport->channel != channel)
2711 continue;
2712
aedf3497 2713 switch (fc_host->tgtid_bind_type) {
1da177e4
LT		 2714 case FC_TGTID_BIND_BY_WWPN:
2715 if (rport->port_name == ids->port_name)
2716 match = 1;
2717 break;
2718 case FC_TGTID_BIND_BY_WWNN:
2719 if (rport->node_name == ids->node_name)
2720 match = 1;
2721 break;
2722 case FC_TGTID_BIND_BY_ID:
2723 if (rport->port_id == ids->port_id)
2724 match = 1;
2725 break;
2726 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2727 break;
2728 }
2729
2730 if (match) {
aedf3497 2731 list_move_tail(&rport->peers, &fc_host->rports);
1da177e4
LT		 2732 break;
2733 }
2734 }
2735
1da177e4
LT		 2736 if (match) {
2737 memcpy(&rport->node_name, &ids->node_name,
2738 sizeof(rport->node_name));
2739 memcpy(&rport->port_name, &ids->port_name,
2740 sizeof(rport->port_name));
2741 rport->port_id = ids->port_id;
2742 rport->roles = ids->roles;
2743 rport->port_state = FC_PORTSTATE_ONLINE;
fff9d40c 2744 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 2745
19a7b4ae
JSEC		 2746 if (fci->f->dd_fcrport_size)
2747 memset(rport->dd_data, 0,
2748 fci->f->dd_fcrport_size);
2749
a53eb5e0 2750 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
1da177e4 2751 /* initiate a scan of the target */
aedf3497 2752 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2753 scsi_queue_work(shost, &rport->scan_work);
a0785edf
JS		 2754 spin_unlock_irqrestore(shost->host_lock, flags);
2755 scsi_target_unblock(&rport->dev);
2756 } else
2757 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2758
2759 return rport;
2760 }
2761 }
2762
19a7b4ae
JSEC		 2763 spin_unlock_irqrestore(shost->host_lock, flags);
2764
1da177e4
LT		 2765 /* No consistent binding found - create new remote port entry */
2766 rport = fc_rport_create(shost, channel, ids);
2767
2768 return rport;
2769}
2770EXPORT_SYMBOL(fc_remote_port_add);
2771
1da177e4
LT		 2772
2773/**
eb44820c 2774 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
1da177e4
LT		 2775 * @rport: The remote port that no longer exists
2776 *
2777 * The LLDD calls this routine to notify the transport that a remote
2778 * port is no longer part of the topology. Note: Although a port
2779 * may no longer be part of the topology, it may persist in the remote
19a7b4ae 2780 * ports displayed by the fc_host. We do this under 2 conditions:
eb44820c 2781 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
19a7b4ae
JSEC		 2782 * This allows the port to temporarily disappear, then reappear without
2783 * disrupting the SCSI device tree attached to it. During the "blocked"
2784 * period the port will still exist.
eb44820c 2785 * 2) If the port was a scsi target and disappears for longer than we
19a7b4ae
JSEC		 2786 * expect, we'll delete the port and the tear down the SCSI device tree
2787 * attached to it. However, we want to semi-persist the target id assigned
2788 * to that port if it eventually does exist. The port structure will
2789 * remain (although with minimal information) so that the target id
2790 * bindings remails.
1da177e4
LT		 2791 *
2792 * If the remote port is not an FCP Target, it will be fully torn down
2793 * and deallocated, including the fc_remote_port class device.
2794 *
19a7b4ae
JSEC		 2795 * If the remote port is an FCP Target, the port will be placed in a
2796 * temporary blocked state. From the LLDD's perspective, the rport no
2797 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2798 * exists, but all sdevs on it are blocked from further I/O. The following
eb44820c
RL		 2799 * is then expected.
2800 *
19a7b4ae
JSEC		 2801 * If the remote port does not return (signaled by a LLDD call to
2802 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2803 * scsi target is removed - killing all outstanding i/o and removing the
2804 * scsi devices attached ot it. The port structure will be marked Not
2805 * Present and be partially cleared, leaving only enough information to
2806 * recognize the remote port relative to the scsi target id binding if
2807 * it later appears. The port will remain as long as there is a valid
2808 * binding (e.g. until the user changes the binding type or unloads the
2809 * scsi host with the binding).
1da177e4 2810 *
19a7b4ae
JSEC		 2811 * If the remote port returns within the dev_loss_tmo value (and matches
2812 * according to the target id binding type), the port structure will be
2813 * reused. If it is no longer a SCSI target, the target will be torn
2814 * down. If it continues to be a SCSI target, then the target will be
2815 * unblocked (allowing i/o to be resumed), and a scan will be activated
2816 * to ensure that all luns are detected.
2817 *
2818 * Called from normal process context only - cannot be called from interrupt.
1da177e4
LT		 2819 *
2820 * Notes:
2821 * This routine assumes no locks are held on entry.
eb44820c 2822 */
1da177e4
LT		 2823void
2824fc_remote_port_delete(struct fc_rport *rport)
2825{
aedf3497 2826 struct Scsi_Host *shost = rport_to_shost(rport);
19a7b4ae 2827 int timeout = rport->dev_loss_tmo;
aedf3497
JS		 2828 unsigned long flags;
2829
2830 /*
2831 * No need to flush the fc_host work_q's, as all adds are synchronous.
2832 *
2833 * We do need to reclaim the rport scan work element, so eventually
2834 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2835 * there's still a scan pending.
2836 */
2837
2838 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2839
92740b24 2840 if (rport->port_state != FC_PORTSTATE_ONLINE) {
aedf3497 2841 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2842 return;
2843 }
2844
92740b24
JS		 2845 /*
2846 * In the past, we if this was not an FCP-Target, we would
2847 * unconditionally just jump to deleting the rport.
2848 * However, rports can be used as node containers by the LLDD,
2849 * and its not appropriate to just terminate the rport at the
2850 * first sign of a loss in connectivity. The LLDD may want to
2851 * send ELS traffic to re-validate the login. If the rport is
2852 * immediately deleted, it makes it inappropriate for a node
2853 * container.
2854 * So... we now unconditionally wait dev_loss_tmo before
2855 * destroying an rport.
2856 */
2857
aedf3497
JS		 2858 rport->port_state = FC_PORTSTATE_BLOCKED;
2859
2860 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2861
2862 spin_unlock_irqrestore(shost->host_lock, flags);
2863
7525236d
FT		 2864 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
2865 shost->active_mode & MODE_TARGET)
2866 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
2867
19a7b4ae 2868 scsi_target_block(&rport->dev);
1da177e4 2869
0f29b966
JS		 2870 /* see if we need to kill io faster than waiting for device loss */
2871 if ((rport->fast_io_fail_tmo != -1) &&
fff9d40c 2872 (rport->fast_io_fail_tmo < timeout))
0f29b966
JS		 2873 fc_queue_devloss_work(shost, &rport->fail_io_work,
2874 rport->fast_io_fail_tmo * HZ);
2875
19a7b4ae 2876 /* cap the length the devices can be blocked until they are deleted */
aedf3497 2877 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
1da177e4
LT		 2878}
2879EXPORT_SYMBOL(fc_remote_port_delete);
2880
2881/**
eb44820c 2882 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
1da177e4 2883 * @rport: The remote port that changed.
eb44820c 2884 * @roles: New roles for this port.
1da177e4 2885 *
eb44820c
RL		 2886 * Description: The LLDD calls this routine to notify the transport that the
2887 * roles on a remote port may have changed. The largest effect of this is
1da177e4
LT		 2888 * if a port now becomes a FCP Target, it must be allocated a
2889 * scsi target id. If the port is no longer a FCP target, any
2890 * scsi target id value assigned to it will persist in case the
2891 * role changes back to include FCP Target. No changes in the scsi
2892 * midlayer will be invoked if the role changes (in the expectation
2893 * that the role will be resumed. If it doesn't normal error processing
2894 * will take place).
2895 *
2896 * Should not be called from interrupt context.
2897 *
2898 * Notes:
2899 * This routine assumes no locks are held on entry.
eb44820c 2900 */
1da177e4
LT		 2901void
2902fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
2903{
2904 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 2905 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2906 unsigned long flags;
2907 int create = 0;
7525236d 2908 int ret;
1da177e4 2909
1da177e4 2910 spin_lock_irqsave(shost->host_lock, flags);
a53eb5e0 2911 if (roles & FC_PORT_ROLE_FCP_TARGET) {
19a7b4ae
JSEC		 2912 if (rport->scsi_target_id == -1) {
2913 rport->scsi_target_id = fc_host->next_target_id++;
2914 create = 1;
a53eb5e0 2915 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
19a7b4ae 2916 create = 1;
7525236d
FT		 2917 } else if (shost->active_mode & MODE_TARGET) {
2918 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
2919 (char *)&rport->node_name);
2920 if (ret)
2921 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
2922 ret);
1da177e4 2923 }
1da177e4 2924
19a7b4ae
JSEC		 2925 rport->roles = roles;
2926
aedf3497
JS		 2927 spin_unlock_irqrestore(shost->host_lock, flags);
2928
19a7b4ae
JSEC		 2929 if (create) {
2930 /*
2931 * There may have been a delete timer running on the
2932 * port. Ensure that it is cancelled as we now know
2933 * the port is an FCP Target.
2934 * Note: we know the rport is exists and in an online
2935 * state as the LLDD would not have had an rport
2936 * reference to pass us.
2937 *
2938 * Take no action on the del_timer failure as the state
2939 * machine state change will validate the
2940 * transaction.
2941 */
0f29b966
JS		 2942 if (!cancel_delayed_work(&rport->fail_io_work))
2943 fc_flush_devloss(shost);
19a7b4ae 2944 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2945 fc_flush_devloss(shost);
2946
2947 spin_lock_irqsave(shost->host_lock, flags);
fff9d40c
MC		 2948 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2949 FC_RPORT_DEVLOSS_PENDING);
aedf3497
JS		 2950 spin_unlock_irqrestore(shost->host_lock, flags);
2951
2952 /* ensure any stgt delete functions are done */
2953 fc_flush_work(shost);
19a7b4ae 2954
1da177e4 2955 /* initiate a scan of the target */
aedf3497
JS		 2956 spin_lock_irqsave(shost->host_lock, flags);
2957 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2958 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2959 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf 2960 scsi_target_unblock(&rport->dev);
19a7b4ae 2961 }
1da177e4
LT		 2962}
2963EXPORT_SYMBOL(fc_remote_port_rolechg);
2964
2965/**
eb44820c 2966 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
92740b24 2967 * @work: rport target that failed to reappear in the allotted time.
eb44820c
RL		 2968 *
2969 * Description: An attempt to delete a remote port blocks, and if it fails
2970 * to return in the allotted time this gets called.
2971 */
1da177e4 2972static void
c4028958 2973fc_timeout_deleted_rport(struct work_struct *work)
1da177e4 2974{
c4028958
DH		 2975 struct fc_rport *rport =
2976 container_of(work, struct fc_rport, dev_loss_work.work);
19a7b4ae 2977 struct Scsi_Host *shost = rport_to_shost(rport);
4be98c0c 2978 struct fc_internal *i = to_fc_internal(shost->transportt);
aedf3497 2979 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
19a7b4ae 2980 unsigned long flags;
8798a694 2981 int do_callback = 0;
1da177e4 2982
19a7b4ae 2983 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2984
aedf3497
JS		 2985 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2986
1da177e4 2987 /*
92740b24
JS		 2988 * If the port is ONLINE, then it came back. If it was a SCSI
2989 * target, validate it still is. If not, tear down the
2990 * scsi_target on it.
1da177e4 2991 */
aedf3497 2992 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
92740b24 2993 (rport->scsi_target_id != -1) &&
a53eb5e0 2994 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
19a7b4ae 2995 dev_printk(KERN_ERR, &rport->dev,
aedf3497
JS		 2996 "blocked FC remote port time out: no longer"
2997 " a FCP target, removing starget\n");
aedf3497 2998 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf
JS		 2999 scsi_target_unblock(&rport->dev);
3000 fc_queue_work(shost, &rport->stgt_delete_work);
19a7b4ae
JSEC		 3001 return;
3002 }
1da177e4 3003
92740b24 3004 /* NOOP state - we're flushing workq's */
19a7b4ae
JSEC		 3005 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3006 spin_unlock_irqrestore(shost->host_lock, flags);
3007 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3008 "blocked FC remote port time out: leaving"
3009 " rport%s alone\n",
3010 (rport->scsi_target_id != -1) ? " and starget" : "");
19a7b4ae
JSEC		 3011 return;
3012 }
1da177e4 3013
92740b24
JS		 3014 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3015 (rport->scsi_target_id == -1)) {
aedf3497
JS		 3016 list_del(&rport->peers);
3017 rport->port_state = FC_PORTSTATE_DELETED;
19a7b4ae 3018 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3019 "blocked FC remote port time out: removing"
3020 " rport%s\n",
3021 (rport->scsi_target_id != -1) ? " and starget" : "");
aedf3497
JS		 3022 fc_queue_work(shost, &rport->rport_delete_work);
3023 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC		 3024 return;
3025 }
1da177e4 3026
19a7b4ae
JSEC		 3027 dev_printk(KERN_ERR, &rport->dev,
3028 "blocked FC remote port time out: removing target and "
3029 "saving binding\n");
3030
aedf3497 3031 list_move_tail(&rport->peers, &fc_host->rport_bindings);
1da177e4
LT		 3032
3033 /*
19a7b4ae
JSEC		 3034 * Note: We do not remove or clear the hostdata area. This allows
3035 * host-specific target data to persist along with the
3036 * scsi_target_id. It's up to the host to manage it's hostdata area.
1da177e4 3037 */
1da177e4 3038
19a7b4ae
JSEC		 3039 /*
3040 * Reinitialize port attributes that may change if the port comes back.
3041 */
3042 rport->maxframe_size = -1;
3043 rport->supported_classes = FC_COS_UNSPECIFIED;
a53eb5e0 3044 rport->roles = FC_PORT_ROLE_UNKNOWN;
aedf3497 3045 rport->port_state = FC_PORTSTATE_NOTPRESENT;
fff9d40c 3046 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 3047
f78badb1
JS		 3048 /*
3049 * Pre-emptively kill I/O rather than waiting for the work queue
3050 * item to teardown the starget. (FCOE libFC folks prefer this
3051 * and to have the rport_port_id still set when it's done).
3052 */
3053 spin_unlock_irqrestore(shost->host_lock, flags);
3054 fc_terminate_rport_io(rport);
3055
8798a694
MR		 3056 spin_lock_irqsave(shost->host_lock, flags);
3057
3058 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3059
3060 /* remove the identifiers that aren't used in the consisting binding */
3061 switch (fc_host->tgtid_bind_type) {
3062 case FC_TGTID_BIND_BY_WWPN:
3063 rport->node_name = -1;
3064 rport->port_id = -1;
3065 break;
3066 case FC_TGTID_BIND_BY_WWNN:
3067 rport->port_name = -1;
3068 rport->port_id = -1;
3069 break;
3070 case FC_TGTID_BIND_BY_ID:
3071 rport->node_name = -1;
3072 rport->port_name = -1;
3073 break;
3074 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3075 break;
3076 }
3077
3078 /*
3079 * As this only occurs if the remote port (scsi target)
3080 * went away and didn't come back - we'll remove
3081 * all attached scsi devices.
3082 */
3083 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3084 fc_queue_work(shost, &rport->stgt_delete_work);
3085
3086 do_callback = 1;
19a7b4ae
JSEC		 3087 }
3088
8798a694 3089 spin_unlock_irqrestore(shost->host_lock, flags);
4be98c0c
JS		 3090
3091 /*
3092 * Notify the driver that the rport is now dead. The LLDD will
3093 * also guarantee that any communication to the rport is terminated
3094 *
3095 * Note: we set the CALLBK_DONE flag above to correspond
3096 */
8798a694 3097 if (do_callback && i->f->dev_loss_tmo_callbk)
4be98c0c 3098 i->f->dev_loss_tmo_callbk(rport);
1da177e4 3099}
1da177e4 3100
4be98c0c 3101
0f29b966 3102/**
eb44820c 3103 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
c4028958 3104 * @work: rport to terminate io on.
0f29b966
JS		 3105 *
3106 * Notes: Only requests the failure of the io, not that all are flushed
3107 * prior to returning.
eb44820c 3108 */
0f29b966 3109static void
c4028958 3110fc_timeout_fail_rport_io(struct work_struct *work)
0f29b966 3111{
c4028958
DH		 3112 struct fc_rport *rport =
3113 container_of(work, struct fc_rport, fail_io_work.work);
0f29b966
JS		 3114
3115 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3116 return;
3117
fff9d40c
MC		 3118 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3119 fc_terminate_rport_io(rport);
0f29b966
JS		 3120}
3121
1da177e4
LT		 3122/**
3123 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
c4028958 3124 * @work: remote port to be scanned.
eb44820c 3125 */
1da177e4 3126static void
c4028958 3127fc_scsi_scan_rport(struct work_struct *work)
1da177e4 3128{
c4028958
DH		 3129 struct fc_rport *rport =
3130 container_of(work, struct fc_rport, scan_work);
aedf3497 3131 struct Scsi_Host *shost = rport_to_shost(rport);
03f002f7 3132 struct fc_internal *i = to_fc_internal(shost->transportt);
42e33148
JSEC		 3133 unsigned long flags;
3134
aedf3497 3135 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
03f002f7
CS		 3136 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3137 !(i->f->disable_target_scan)) {
aedf3497
JS		 3138 scsi_scan_target(&rport->dev, rport->channel,
3139 rport->scsi_target_id, SCAN_WILD_CARD, 1);
42e33148 3140 }
aedf3497
JS		 3141
3142 spin_lock_irqsave(shost->host_lock, flags);
3143 rport->flags &= ~FC_RPORT_SCAN_PENDING;
42e33148
JSEC		 3144 spin_unlock_irqrestore(shost->host_lock, flags);
3145}
3146
3147
a53eb5e0 3148/**
a30c3f69 3149 * fc_vport_setup - allocates and creates a FC virtual port.
a53eb5e0
JS		 3150 * @shost: scsi host the virtual port is connected to.
3151 * @channel: Channel on shost port connected to.
3152 * @pdev: parent device for vport
3153 * @ids: The world wide names, FC4 port roles, etc for
3154 * the virtual port.
3155 * @ret_vport: The pointer to the created vport.
3156 *
3157 * Allocates and creates the vport structure, calls the parent host
3158 * to instantiate the vport, the completes w/ class and sysfs creation.
3159 *
3160 * Notes:
3161 * This routine assumes no locks are held on entry.
eb44820c 3162 */
a53eb5e0 3163static int
a30c3f69 3164fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
a53eb5e0
JS		 3165 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3166{
3167 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3168 struct fc_internal *fci = to_fc_internal(shost->transportt);
3169 struct fc_vport *vport;
3170 struct device *dev;
3171 unsigned long flags;
3172 size_t size;
3173 int error;
3174
3175 *ret_vport = NULL;
3176
3177 if ( ! fci->f->vport_create)
3178 return -ENOENT;
3179
3180 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3181 vport = kzalloc(size, GFP_KERNEL);
3182 if (unlikely(!vport)) {
cadbd4a5 3183 printk(KERN_ERR "%s: allocation failure\n", __func__);
a53eb5e0
JS		 3184 return -ENOMEM;
3185 }
3186
3187 vport->vport_state = FC_VPORT_UNKNOWN;
3188 vport->vport_last_state = FC_VPORT_UNKNOWN;
3189 vport->node_name = ids->node_name;
3190 vport->port_name = ids->port_name;
3191 vport->roles = ids->roles;
3192 vport->vport_type = ids->vport_type;
3193 if (fci->f->dd_fcvport_size)
3194 vport->dd_data = &vport[1];
3195 vport->shost = shost;
3196 vport->channel = channel;
3197 vport->flags = FC_VPORT_CREATING;
9ef3e4a4 3198 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
a53eb5e0
JS		 3199
3200 spin_lock_irqsave(shost->host_lock, flags);
3201
3202 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3203 spin_unlock_irqrestore(shost->host_lock, flags);
3204 kfree(vport);
3205 return -ENOSPC;
3206 }
3207 fc_host->npiv_vports_inuse++;
3208 vport->number = fc_host->next_vport_number++;
3209 list_add_tail(&vport->peers, &fc_host->vports);
3210 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3211
3212 spin_unlock_irqrestore(shost->host_lock, flags);
3213
3214 dev = &vport->dev;
3215 device_initialize(dev); /* takes self reference */
3216 dev->parent = get_device(pdev); /* takes parent reference */
3217 dev->release = fc_vport_dev_release;
71610f55
KS		 3218 dev_set_name(dev, "vport-%d:%d-%d",
3219 shost->host_no, channel, vport->number);
a53eb5e0
JS		 3220 transport_setup_device(dev);
3221
3222 error = device_add(dev);
3223 if (error) {
3224 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3225 goto delete_vport;
3226 }
3227 transport_add_device(dev);
3228 transport_configure_device(dev);
3229
3230 error = fci->f->vport_create(vport, ids->disable);
3231 if (error) {
3232 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3233 goto delete_vport_all;
3234 }
3235
3236 /*
3237 * if the parent isn't the physical adapter's Scsi_Host, ensure
3238 * the Scsi_Host at least contains ia symlink to the vport.
3239 */
3240 if (pdev != &shost->shost_gendev) {
3241 error = sysfs_create_link(&shost->shost_gendev.kobj,
71610f55 3242 &dev->kobj, dev_name(dev));
a53eb5e0
JS		 3243 if (error)
3244 printk(KERN_ERR
3245 "%s: Cannot create vport symlinks for "
3246 "%s, err=%d\n",
71610f55 3247 __func__, dev_name(dev), error);
a53eb5e0
JS		 3248 }
3249 spin_lock_irqsave(shost->host_lock, flags);
3250 vport->flags &= ~FC_VPORT_CREATING;
3251 spin_unlock_irqrestore(shost->host_lock, flags);
3252
3253 dev_printk(KERN_NOTICE, pdev,
71610f55 3254 "%s created via shost%d channel %d\n", dev_name(dev),
a53eb5e0
JS		 3255 shost->host_no, channel);
3256
3257 *ret_vport = vport;
3258
3259 return 0;
3260
3261delete_vport_all:
3262 transport_remove_device(dev);
3263 device_del(dev);
3264delete_vport:
3265 transport_destroy_device(dev);
3266 spin_lock_irqsave(shost->host_lock, flags);
3267 list_del(&vport->peers);
3268 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3269 fc_host->npiv_vports_inuse--;
3270 spin_unlock_irqrestore(shost->host_lock, flags);
3271 put_device(dev->parent);
3272 kfree(vport);
3273
3274 return error;
3275}
3276
a30c3f69
AV		 3277/**
3278 * fc_vport_create - Admin App or LLDD requests creation of a vport
3279 * @shost: scsi host the virtual port is connected to.
3280 * @channel: channel on shost port connected to.
3281 * @ids: The world wide names, FC4 port roles, etc for
3282 * the virtual port.
3283 *
3284 * Notes:
3285 * This routine assumes no locks are held on entry.
3286 */
3287struct fc_vport *
3288fc_vport_create(struct Scsi_Host *shost, int channel,
3289 struct fc_vport_identifiers *ids)
3290{
3291 int stat;
3292 struct fc_vport *vport;
3293
3294 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3295 ids, &vport);
3296 return stat ? NULL : vport;
3297}
3298EXPORT_SYMBOL(fc_vport_create);
a53eb5e0
JS		 3299
3300/**
3301 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3302 * @vport: fc_vport to be terminated
3303 *
3304 * Calls the LLDD vport_delete() function, then deallocates and removes
3305 * the vport from the shost and object tree.
3306 *
3307 * Notes:
3308 * This routine assumes no locks are held on entry.
eb44820c 3309 */
a53eb5e0
JS		 3310int
3311fc_vport_terminate(struct fc_vport *vport)
3312{
3313 struct Scsi_Host *shost = vport_to_shost(vport);
3314 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3315 struct fc_internal *i = to_fc_internal(shost->transportt);
3316 struct device *dev = &vport->dev;
3317 unsigned long flags;
3318 int stat;
3319
3320 spin_lock_irqsave(shost->host_lock, flags);
3321 if (vport->flags & FC_VPORT_CREATING) {
3322 spin_unlock_irqrestore(shost->host_lock, flags);
3323 return -EBUSY;
3324 }
3325 if (vport->flags & (FC_VPORT_DEL)) {
3326 spin_unlock_irqrestore(shost->host_lock, flags);
3327 return -EALREADY;
3328 }
3329 vport->flags |= FC_VPORT_DELETING;
3330 spin_unlock_irqrestore(shost->host_lock, flags);
3331
3332 if (i->f->vport_delete)
3333 stat = i->f->vport_delete(vport);
3334 else
3335 stat = -ENOENT;
3336
3337 spin_lock_irqsave(shost->host_lock, flags);
3338 vport->flags &= ~FC_VPORT_DELETING;
3339 if (!stat) {
3340 vport->flags |= FC_VPORT_DELETED;
3341 list_del(&vport->peers);
3342 fc_host->npiv_vports_inuse--;
3343 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3344 }
3345 spin_unlock_irqrestore(shost->host_lock, flags);
3346
3347 if (stat)
3348 return stat;
3349
3350 if (dev->parent != &shost->shost_gendev)
71610f55 3351 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
a53eb5e0
JS		 3352 transport_remove_device(dev);
3353 device_del(dev);
3354 transport_destroy_device(dev);
3355
3356 /*
3357 * Removing our self-reference should mean our
3358 * release function gets called, which will drop the remaining
3359 * parent reference and free the data structure.
3360 */
3361 put_device(dev); /* for self-reference */
3362
3363 return 0; /* SUCCESS */
3364}
3365EXPORT_SYMBOL(fc_vport_terminate);
3366
9ef3e4a4
JS		 3367/**
3368 * fc_vport_sched_delete - workq-based delete request for a vport
9ef3e4a4 3369 * @work: vport to be deleted.
eb44820c 3370 */
9ef3e4a4
JS		 3371static void
3372fc_vport_sched_delete(struct work_struct *work)
3373{
3374 struct fc_vport *vport =
3375 container_of(work, struct fc_vport, vport_delete_work);
3376 int stat;
3377
3378 stat = fc_vport_terminate(vport);
3379 if (stat)
3380 dev_printk(KERN_ERR, vport->dev.parent,
3381 "%s: %s could not be deleted created via "
cadbd4a5 3382 "shost%d channel %d - error %d\n", __func__,
71610f55 3383 dev_name(&vport->dev), vport->shost->host_no,
9ef3e4a4
JS		 3384 vport->channel, stat);
3385}
3386
a53eb5e0 3387
9e4f5e29
JS		 3388/*
3389 * BSG support
3390 */
3391
3392
3393/**
3394 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3395 * @job: fc_bsg_job that is to be torn down
3396 */
3397static void
3398fc_destroy_bsgjob(struct fc_bsg_job *job)
3399{
3400 unsigned long flags;
3401
3402 spin_lock_irqsave(&job->job_lock, flags);
3403 if (job->ref_cnt) {
3404 spin_unlock_irqrestore(&job->job_lock, flags);
3405 return;
3406 }
3407 spin_unlock_irqrestore(&job->job_lock, flags);
3408
3409 put_device(job->dev); /* release reference for the request */
3410
3411 kfree(job->request_payload.sg_list);
3412 kfree(job->reply_payload.sg_list);
3413 kfree(job);
3414}
3415
9e4f5e29
JS		 3416/**
3417 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3418 * completed
3419 * @job: fc_bsg_job that is complete
3420 */
3421static void
3422fc_bsg_jobdone(struct fc_bsg_job *job)
3423{
3424 struct request *req = job->req;
3425 struct request *rsp = req->next_rq;
9e4f5e29
JS		 3426 int err;
3427
9e4f5e29 3428 err = job->req->errors = job->reply->result;
b5c6f776 3429
9e4f5e29
JS		 3430 if (err < 0)
3431 /* we're only returning the result field in the reply */
3432 job->req->sense_len = sizeof(uint32_t);
3433 else
3434 job->req->sense_len = job->reply_len;
3435
3436 /* we assume all request payload was transferred, residual == 0 */
3437 req->resid_len = 0;
3438
3439 if (rsp) {
3440 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3441
3442 /* set reply (bidi) residual */
3443 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3444 rsp->resid_len);
3445 }
b5c6f776
GM		 3446 blk_complete_request(req);
3447}
3448
3449/**
3450 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
fe5d20c8 3451 * @rq: BSG request that holds the job to be destroyed
b5c6f776
GM		 3452 */
3453static void fc_bsg_softirq_done(struct request *rq)
3454{
3455 struct fc_bsg_job *job = rq->special;
3456 unsigned long flags;
9e4f5e29 3457
b5c6f776
GM		 3458 spin_lock_irqsave(&job->job_lock, flags);
3459 job->state_flags |= FC_RQST_STATE_DONE;
3460 job->ref_cnt--;
3461 spin_unlock_irqrestore(&job->job_lock, flags);
9e4f5e29 3462
b5c6f776 3463 blk_end_request_all(rq, rq->errors);
9e4f5e29
JS		 3464 fc_destroy_bsgjob(job);
3465}
3466
9e4f5e29
JS		 3467/**
3468 * fc_bsg_job_timeout - handler for when a bsg request timesout
3469 * @req: request that timed out
3470 */
3471static enum blk_eh_timer_return
3472fc_bsg_job_timeout(struct request *req)
3473{
3474 struct fc_bsg_job *job = (void *) req->special;
3475 struct Scsi_Host *shost = job->shost;
3476 struct fc_internal *i = to_fc_internal(shost->transportt);
3477 unsigned long flags;
3478 int err = 0, done = 0;
3479
3480 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3481 return BLK_EH_RESET_TIMER;
3482
3483 spin_lock_irqsave(&job->job_lock, flags);
3484 if (job->state_flags & FC_RQST_STATE_DONE)
3485 done = 1;
3486 else
3487 job->ref_cnt++;
3488 spin_unlock_irqrestore(&job->job_lock, flags);
3489
3490 if (!done && i->f->bsg_timeout) {
3491 /* call LLDD to abort the i/o as it has timed out */
3492 err = i->f->bsg_timeout(job);
3493 if (err)
3494 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3495 "abort failed with status %d\n", err);
3496 }
3497
9e4f5e29 3498 /* the blk_end_sync_io() doesn't check the error */
47e7e89e
GM		 3499 if (done)
3500 return BLK_EH_NOT_HANDLED;
3501 else
3502 return BLK_EH_HANDLED;
9e4f5e29
JS		 3503}
3504
9e4f5e29
JS		 3505static int
3506fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3507{
3508 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3509
3510 BUG_ON(!req->nr_phys_segments);
3511
3512 buf->sg_list = kzalloc(sz, GFP_KERNEL);
3513 if (!buf->sg_list)
3514 return -ENOMEM;
3515 sg_init_table(buf->sg_list, req->nr_phys_segments);
3516 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3517 buf->payload_len = blk_rq_bytes(req);
3518 return 0;
3519}
3520
3521
3522/**
3523 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3524 * bsg request
3525 * @shost: SCSI Host corresponding to the bsg object
3526 * @rport: (optional) FC Remote Port corresponding to the bsg object
3527 * @req: BSG request that needs a job structure
3528 */
3529static int
3530fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3531 struct request *req)
3532{
3533 struct fc_internal *i = to_fc_internal(shost->transportt);
3534 struct request *rsp = req->next_rq;
3535 struct fc_bsg_job *job;
3536 int ret;
3537
3538 BUG_ON(req->special);
3539
3540 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3541 GFP_KERNEL);
3542 if (!job)
3543 return -ENOMEM;
3544
3545 /*
3546 * Note: this is a bit silly.
3547 * The request gets formatted as a SGIO v4 ioctl request, which
3548 * then gets reformatted as a blk request, which then gets
3549 * reformatted as a fc bsg request. And on completion, we have
3550 * to wrap return results such that SGIO v4 thinks it was a scsi
3551 * status. I hope this was all worth it.
3552 */
3553
3554 req->special = job;
3555 job->shost = shost;
3556 job->rport = rport;
3557 job->req = req;
3558 if (i->f->dd_bsg_size)
3559 job->dd_data = (void *)&job[1];
3560 spin_lock_init(&job->job_lock);
3561 job->request = (struct fc_bsg_request *)req->cmd;
3562 job->request_len = req->cmd_len;
3563 job->reply = req->sense;
3564 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3565 * allocated */
3566 if (req->bio) {
3567 ret = fc_bsg_map_buffer(&job->request_payload, req);
3568 if (ret)
3569 goto failjob_rls_job;
3570 }
3571 if (rsp && rsp->bio) {
3572 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3573 if (ret)
3574 goto failjob_rls_rqst_payload;
3575 }
3576 job->job_done = fc_bsg_jobdone;
3577 if (rport)
3578 job->dev = &rport->dev;
3579 else
3580 job->dev = &shost->shost_gendev;
3581 get_device(job->dev); /* take a reference for the request */
3582
3583 job->ref_cnt = 1;
3584
3585 return 0;
3586
3587
3588failjob_rls_rqst_payload:
3589 kfree(job->request_payload.sg_list);
3590failjob_rls_job:
3591 kfree(job);
3592 return -ENOMEM;
3593}
3594
3595
3596enum fc_dispatch_result {
3597 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
3598 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
3599 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
3600};
3601
3602
3603/**
3604 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
5415907a 3605 * @q: fc host request queue
9e4f5e29
JS		 3606 * @shost: scsi host rport attached to
3607 * @job: bsg job to be processed
3608 */
3609static enum fc_dispatch_result
3610fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3611 struct fc_bsg_job *job)
3612{
3613 struct fc_internal *i = to_fc_internal(shost->transportt);
3614 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3615 int ret;
3616
3617 /* Validate the host command */
3618 switch (job->request->msgcode) {
3619 case FC_BSG_HST_ADD_RPORT:
3620 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3621 break;
3622
3623 case FC_BSG_HST_DEL_RPORT:
3624 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3625 break;
3626
3627 case FC_BSG_HST_ELS_NOLOGIN:
3628 cmdlen += sizeof(struct fc_bsg_host_els);
3629 /* there better be a xmt and rcv payloads */
3630 if ((!job->request_payload.payload_len) ||
3631 (!job->reply_payload.payload_len)) {
3632 ret = -EINVAL;
3633 goto fail_host_msg;
3634 }
3635 break;
3636
3637 case FC_BSG_HST_CT:
3638 cmdlen += sizeof(struct fc_bsg_host_ct);
3639 /* there better be xmt and rcv payloads */
3640 if ((!job->request_payload.payload_len) ||
3641 (!job->reply_payload.payload_len)) {
3642 ret = -EINVAL;
3643 goto fail_host_msg;
3644 }
3645 break;
3646
3647 case FC_BSG_HST_VENDOR:
3648 cmdlen += sizeof(struct fc_bsg_host_vendor);
3649 if ((shost->hostt->vendor_id == 0L) ||
3650 (job->request->rqst_data.h_vendor.vendor_id !=
3651 shost->hostt->vendor_id)) {
3652 ret = -ESRCH;
3653 goto fail_host_msg;
3654 }
3655 break;
3656
3657 default:
3658 ret = -EBADR;
3659 goto fail_host_msg;
3660 }
3661
3662 /* check if we really have all the request data needed */
3663 if (job->request_len < cmdlen) {
3664 ret = -ENOMSG;
3665 goto fail_host_msg;
3666 }
3667
3668 ret = i->f->bsg_request(job);
3669 if (!ret)
3670 return FC_DISPATCH_UNLOCKED;
3671
3672fail_host_msg:
3673 /* return the errno failure code as the only status */
3674 BUG_ON(job->reply_len < sizeof(uint32_t));
3675 job->reply->result = ret;
3676 job->reply_len = sizeof(uint32_t);
3677 fc_bsg_jobdone(job);
3678 return FC_DISPATCH_UNLOCKED;
3679}
3680
3681
3682/*
3683 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3684 * @rport: rport to be restarted
3685 */
3686static void
3687fc_bsg_goose_queue(struct fc_rport *rport)
3688{
3689 int flagset;
39562e78 3690 unsigned long flags;
9e4f5e29
JS		 3691
3692 if (!rport->rqst_q)
3693 return;
3694
3695 get_device(&rport->dev);
3696
39562e78 3697 spin_lock_irqsave(rport->rqst_q->queue_lock, flags);
9e4f5e29
JS		 3698 flagset = test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags) &&
3699 !test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags);
3700 if (flagset)
3701 queue_flag_set(QUEUE_FLAG_REENTER, rport->rqst_q);
3702 __blk_run_queue(rport->rqst_q);
3703 if (flagset)
3704 queue_flag_clear(QUEUE_FLAG_REENTER, rport->rqst_q);
39562e78 3705 spin_unlock_irqrestore(rport->rqst_q->queue_lock, flags);
9e4f5e29
JS		 3706
3707 put_device(&rport->dev);
3708}
3709
3710
3711/**
3712 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
5415907a 3713 * @q: rport request queue
9e4f5e29
JS		 3714 * @shost: scsi host rport attached to
3715 * @rport: rport request destined to
3716 * @job: bsg job to be processed
3717 */
3718static enum fc_dispatch_result
3719fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3720 struct fc_rport *rport, struct fc_bsg_job *job)
3721{
3722 struct fc_internal *i = to_fc_internal(shost->transportt);
3723 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3724 int ret;
3725
3726 /* Validate the rport command */
3727 switch (job->request->msgcode) {
3728 case FC_BSG_RPT_ELS:
3729 cmdlen += sizeof(struct fc_bsg_rport_els);
3730 goto check_bidi;
3731
3732 case FC_BSG_RPT_CT:
3733 cmdlen += sizeof(struct fc_bsg_rport_ct);
3734check_bidi:
3735 /* there better be xmt and rcv payloads */
3736 if ((!job->request_payload.payload_len) ||
3737 (!job->reply_payload.payload_len)) {
3738 ret = -EINVAL;
3739 goto fail_rport_msg;
3740 }
3741 break;
3742 default:
3743 ret = -EBADR;
3744 goto fail_rport_msg;
3745 }
3746
3747 /* check if we really have all the request data needed */
3748 if (job->request_len < cmdlen) {
3749 ret = -ENOMSG;
3750 goto fail_rport_msg;
3751 }
3752
3753 ret = i->f->bsg_request(job);
3754 if (!ret)
3755 return FC_DISPATCH_UNLOCKED;
3756
3757fail_rport_msg:
3758 /* return the errno failure code as the only status */
3759 BUG_ON(job->reply_len < sizeof(uint32_t));
3760 job->reply->result = ret;
3761 job->reply_len = sizeof(uint32_t);
3762 fc_bsg_jobdone(job);
3763 return FC_DISPATCH_UNLOCKED;
3764}
3765
3766
3767/**
3768 * fc_bsg_request_handler - generic handler for bsg requests
3769 * @q: request queue to manage
3770 * @shost: Scsi_Host related to the bsg object
3771 * @rport: FC remote port related to the bsg object (optional)
3772 * @dev: device structure for bsg object
3773 */
3774static void
3775fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3776 struct fc_rport *rport, struct device *dev)
3777{
3778 struct request *req;
3779 struct fc_bsg_job *job;
3780 enum fc_dispatch_result ret;
3781
3782 if (!get_device(dev))
3783 return;
3784
3785 while (!blk_queue_plugged(q)) {
3786 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED))
3787 break;
3788
3789 req = blk_fetch_request(q);
3790 if (!req)
3791 break;
3792
3793 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3794 req->errors = -ENXIO;
3795 spin_unlock_irq(q->queue_lock);
3796 blk_end_request(req, -ENXIO, blk_rq_bytes(req));
3797 spin_lock_irq(q->queue_lock);
3798 continue;
3799 }
3800
3801 spin_unlock_irq(q->queue_lock);
3802
3803 ret = fc_req_to_bsgjob(shost, rport, req);
3804 if (ret) {
3805 req->errors = ret;
3806 blk_end_request(req, ret, blk_rq_bytes(req));
3807 spin_lock_irq(q->queue_lock);
3808 continue;
3809 }
3810
3811 job = req->special;
3812
3813 /* check if we have the msgcode value at least */
3814 if (job->request_len < sizeof(uint32_t)) {
3815 BUG_ON(job->reply_len < sizeof(uint32_t));
3816 job->reply->result = -ENOMSG;
3817 job->reply_len = sizeof(uint32_t);
3818 fc_bsg_jobdone(job);
3819 spin_lock_irq(q->queue_lock);
3820 continue;
3821 }
3822
3823 /* the dispatch routines will unlock the queue_lock */
3824 if (rport)
3825 ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3826 else
3827 ret = fc_bsg_host_dispatch(q, shost, job);
3828
3829 /* did dispatcher hit state that can't process any more */
3830 if (ret == FC_DISPATCH_BREAK)
3831 break;
3832
3833 /* did dispatcher had released the lock */
3834 if (ret == FC_DISPATCH_UNLOCKED)
3835 spin_lock_irq(q->queue_lock);
3836 }
3837
3838 spin_unlock_irq(q->queue_lock);
3839 put_device(dev);
3840 spin_lock_irq(q->queue_lock);
3841}
3842
3843
3844/**
3845 * fc_bsg_host_handler - handler for bsg requests for a fc host
3846 * @q: fc host request queue
3847 */
3848static void
3849fc_bsg_host_handler(struct request_queue *q)
3850{
3851 struct Scsi_Host *shost = q->queuedata;
3852
3853 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
3854}
3855
3856
3857/**
3858 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
3859 * @q: rport request queue
3860 */
3861static void
3862fc_bsg_rport_handler(struct request_queue *q)
3863{
3864 struct fc_rport *rport = q->queuedata;
3865 struct Scsi_Host *shost = rport_to_shost(rport);
3866
3867 fc_bsg_request_handler(q, shost, rport, &rport->dev);
3868}
3869
3870
3871/**
3872 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3873 * @shost: shost for fc_host
3874 * @fc_host: fc_host adding the structures to
3875 */
3876static int
3877fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3878{
3879 struct device *dev = &shost->shost_gendev;
3880 struct fc_internal *i = to_fc_internal(shost->transportt);
3881 struct request_queue *q;
3882 int err;
3c559ea8 3883 char bsg_name[20];
9e4f5e29
JS		 3884
3885 fc_host->rqst_q = NULL;
3886
3887 if (!i->f->bsg_request)
3888 return -ENOTSUPP;
3889
3890 snprintf(bsg_name, sizeof(bsg_name),
3891 "fc_host%d", shost->host_no);
3892
3893 q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
3894 if (!q) {
3895 printk(KERN_ERR "fc_host%d: bsg interface failed to "
3896 "initialize - no request queue\n",
3897 shost->host_no);
3898 return -ENOMEM;
3899 }
3900
3901 q->queuedata = shost;
3902 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
b5c6f776 3903 blk_queue_softirq_done(q, fc_bsg_softirq_done);
9e4f5e29
JS		 3904 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3905 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
3906
3907 err = bsg_register_queue(q, dev, bsg_name, NULL);
3908 if (err) {
3909 printk(KERN_ERR "fc_host%d: bsg interface failed to "
3910 "initialize - register queue\n",
3911 shost->host_no);
3912 blk_cleanup_queue(q);
3913 return err;
3914 }
3915
3916 fc_host->rqst_q = q;
3917 return 0;
3918}
3919
3920
3921/**
3922 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3923 * @shost: shost that rport is attached to
3924 * @rport: rport that the bsg hooks are being attached to
3925 */
3926static int
3927fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3928{
3929 struct device *dev = &rport->dev;
3930 struct fc_internal *i = to_fc_internal(shost->transportt);
3931 struct request_queue *q;
3932 int err;
3933
3934 rport->rqst_q = NULL;
3935
3936 if (!i->f->bsg_request)
3937 return -ENOTSUPP;
3938
3939 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
3940 if (!q) {
3941 printk(KERN_ERR "%s: bsg interface failed to "
3942 "initialize - no request queue\n",
3943 dev->kobj.name);
3944 return -ENOMEM;
3945 }
3946
3947 q->queuedata = rport;
3948 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
b5c6f776 3949 blk_queue_softirq_done(q, fc_bsg_softirq_done);
9e4f5e29
JS		 3950 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3951 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
3952
3953 err = bsg_register_queue(q, dev, NULL, NULL);
3954 if (err) {
3955 printk(KERN_ERR "%s: bsg interface failed to "
3956 "initialize - register queue\n",
3957 dev->kobj.name);
3958 blk_cleanup_queue(q);
3959 return err;
3960 }
3961
3962 rport->rqst_q = q;
3963 return 0;
3964}
3965
3966
3967/**
3968 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3969 * @q: the request_queue that is to be torn down.
3970 */
3971static void
3972fc_bsg_remove(struct request_queue *q)
3973{
3974 if (q) {
3975 bsg_unregister_queue(q);
3976 blk_cleanup_queue(q);
3977 }
3978}
3979
3980
9ef3e4a4
JS		 3981/* Original Author: Martin Hicks */
3982MODULE_AUTHOR("James Smart");
1da177e4
LT		 3983MODULE_DESCRIPTION("FC Transport Attributes");
3984MODULE_LICENSE("GPL");
3985
3986module_init(fc_transport_init);
3987module_exit(fc_transport_exit);
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