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[SCSI] aha1542: minor irq handler cleanups
[deliverable/linux.git] / drivers / scsi / scsi_transport_fc.c
CommitLineData
9ef3e4a4 1/*
1da177e4
LT		 2 * FiberChannel transport specific attributes exported to sysfs.
3 *
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * ========
21 *
a53eb5e0 22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
1da177e4
LT		 23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
9ef3e4a4 25 * Add vports, etc
1da177e4
LT		 26 *
27 */
28#include <linux/module.h>
29#include <linux/init.h>
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>
1da177e4 38#include "scsi_priv.h"
7525236d 39#include "scsi_transport_fc_internal.h"
1da177e4 40
aedf3497 41static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
9ef3e4a4 42static void fc_vport_sched_delete(struct work_struct *work);
aedf3497 43
a53eb5e0
JS		 44/*
45 * This is a temporary carrier for creating a vport. It will eventually
46 * be replaced by a real message definition for sgio or netlink.
47 *
48 * fc_vport_identifiers: This set of data contains all elements
49 * to uniquely identify and instantiate a FC virtual port.
50 *
51 * Notes:
52 * symbolic_name: The driver is to append the symbolic_name string data
53 * to the symbolic_node_name data that it generates by default.
54 * the resulting combination should then be registered with the switch.
55 * It is expected that things like Xen may stuff a VM title into
56 * this field.
57 */
58struct fc_vport_identifiers {
59 u64 node_name;
60 u64 port_name;
61 u32 roles;
62 bool disable;
63 enum fc_port_type vport_type; /* only FC_PORTTYPE_NPIV allowed */
64 char symbolic_name[FC_VPORT_SYMBOLIC_NAMELEN];
65};
66
67static int fc_vport_create(struct Scsi_Host *shost, int channel,
68 struct device *pdev, struct fc_vport_identifiers *ids,
69 struct fc_vport **vport);
70
1da177e4
LT		 71/*
72 * Redefine so that we can have same named attributes in the
73 * sdev/starget/host objects.
74 */
ee959b00
TJ		 75#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
76struct device_attribute device_attr_##_prefix##_##_name = \
1da177e4
LT		 77 __ATTR(_name,_mode,_show,_store)
78
79#define fc_enum_name_search(title, table_type, table) \
80static const char *get_fc_##title##_name(enum table_type table_key) \
81{ \
82 int i; \
83 char *name = NULL; \
84 \
6391a113 85 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 86 if (table[i].value == table_key) { \
87 name = table[i].name; \
88 break; \
89 } \
90 } \
91 return name; \
92}
93
94#define fc_enum_name_match(title, table_type, table) \
95static int get_fc_##title##_match(const char *table_key, \
96 enum table_type *value) \
97{ \
98 int i; \
99 \
6391a113 100 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 101 if (strncmp(table_key, table[i].name, \
102 table[i].matchlen) == 0) { \
103 *value = table[i].value; \
104 return 0; /* success */ \
105 } \
106 } \
107 return 1; /* failure */ \
108}
109
110
111/* Convert fc_port_type values to ascii string name */
112static struct {
113 enum fc_port_type value;
114 char *name;
115} fc_port_type_names[] = {
116 { FC_PORTTYPE_UNKNOWN, "Unknown" },
117 { FC_PORTTYPE_OTHER, "Other" },
118 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
119 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
120 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
121 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
122 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" },
a53eb5e0 123 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
1da177e4
LT		 124};
125fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
126#define FC_PORTTYPE_MAX_NAMELEN 50
127
a53eb5e0
JS		 128/* Reuse fc_port_type enum function for vport_type */
129#define get_fc_vport_type_name get_fc_port_type_name
130
1da177e4 131
84314fd4
JS		 132/* Convert fc_host_event_code values to ascii string name */
133static const struct {
134 enum fc_host_event_code value;
135 char *name;
136} fc_host_event_code_names[] = {
137 { FCH_EVT_LIP, "lip" },
138 { FCH_EVT_LINKUP, "link_up" },
139 { FCH_EVT_LINKDOWN, "link_down" },
140 { FCH_EVT_LIPRESET, "lip_reset" },
141 { FCH_EVT_RSCN, "rscn" },
142 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
143 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
144 { FCH_EVT_PORT_ONLINE, "port_online" },
145 { FCH_EVT_PORT_OFFLINE, "port_offline" },
146 { FCH_EVT_PORT_FABRIC, "port_fabric" },
147 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
148 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
149};
150fc_enum_name_search(host_event_code, fc_host_event_code,
151 fc_host_event_code_names)
152#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
153
154
1da177e4
LT		 155/* Convert fc_port_state values to ascii string name */
156static struct {
157 enum fc_port_state value;
158 char *name;
159} fc_port_state_names[] = {
160 { FC_PORTSTATE_UNKNOWN, "Unknown" },
161 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
162 { FC_PORTSTATE_ONLINE, "Online" },
163 { FC_PORTSTATE_OFFLINE, "Offline" },
164 { FC_PORTSTATE_BLOCKED, "Blocked" },
165 { FC_PORTSTATE_BYPASSED, "Bypassed" },
166 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
167 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
168 { FC_PORTSTATE_ERROR, "Error" },
169 { FC_PORTSTATE_LOOPBACK, "Loopback" },
42e33148 170 { FC_PORTSTATE_DELETED, "Deleted" },
1da177e4
LT		 171};
172fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
173#define FC_PORTSTATE_MAX_NAMELEN 20
174
175
a53eb5e0
JS		 176/* Convert fc_vport_state values to ascii string name */
177static struct {
178 enum fc_vport_state value;
179 char *name;
180} fc_vport_state_names[] = {
181 { FC_VPORT_UNKNOWN, "Unknown" },
182 { FC_VPORT_ACTIVE, "Active" },
183 { FC_VPORT_DISABLED, "Disabled" },
184 { FC_VPORT_LINKDOWN, "Linkdown" },
185 { FC_VPORT_INITIALIZING, "Initializing" },
186 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
187 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
188 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
189 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
190 { FC_VPORT_FAILED, "VPort Failed" },
191};
192fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
193#define FC_VPORTSTATE_MAX_NAMELEN 24
194
195/* Reuse fc_vport_state enum function for vport_last_state */
196#define get_fc_vport_last_state_name get_fc_vport_state_name
197
198
1da177e4 199/* Convert fc_tgtid_binding_type values to ascii string name */
0ad78200 200static const struct {
1da177e4
LT		 201 enum fc_tgtid_binding_type value;
202 char *name;
203 int matchlen;
204} fc_tgtid_binding_type_names[] = {
205 { FC_TGTID_BIND_NONE, "none", 4 },
206 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
207 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
208 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
209};
210fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
211 fc_tgtid_binding_type_names)
212fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
213 fc_tgtid_binding_type_names)
214#define FC_BINDTYPE_MAX_NAMELEN 30
215
216
217#define fc_bitfield_name_search(title, table) \
218static ssize_t \
219get_fc_##title##_names(u32 table_key, char *buf) \
220{ \
221 char *prefix = ""; \
222 ssize_t len = 0; \
223 int i; \
224 \
6391a113 225 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 226 if (table[i].value & table_key) { \
227 len += sprintf(buf + len, "%s%s", \
228 prefix, table[i].name); \
229 prefix = ", "; \
230 } \
231 } \
232 len += sprintf(buf + len, "\n"); \
233 return len; \
234}
235
236
237/* Convert FC_COS bit values to ascii string name */
0ad78200 238static const struct {
1da177e4
LT		 239 u32 value;
240 char *name;
241} fc_cos_names[] = {
242 { FC_COS_CLASS1, "Class 1" },
243 { FC_COS_CLASS2, "Class 2" },
244 { FC_COS_CLASS3, "Class 3" },
245 { FC_COS_CLASS4, "Class 4" },
246 { FC_COS_CLASS6, "Class 6" },
247};
248fc_bitfield_name_search(cos, fc_cos_names)
249
250
251/* Convert FC_PORTSPEED bit values to ascii string name */
0ad78200 252static const struct {
1da177e4
LT		 253 u32 value;
254 char *name;
255} fc_port_speed_names[] = {
256 { FC_PORTSPEED_1GBIT, "1 Gbit" },
257 { FC_PORTSPEED_2GBIT, "2 Gbit" },
258 { FC_PORTSPEED_4GBIT, "4 Gbit" },
259 { FC_PORTSPEED_10GBIT, "10 Gbit" },
c3d2350a
JS		 260 { FC_PORTSPEED_8GBIT, "8 Gbit" },
261 { FC_PORTSPEED_16GBIT, "16 Gbit" },
1da177e4
LT		 262 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
263};
264fc_bitfield_name_search(port_speed, fc_port_speed_names)
265
266
267static int
268show_fc_fc4s (char *buf, u8 *fc4_list)
269{
270 int i, len=0;
271
272 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
273 len += sprintf(buf + len , "0x%02x ", *fc4_list);
274 len += sprintf(buf + len, "\n");
275 return len;
276}
277
278
a53eb5e0 279/* Convert FC_PORT_ROLE bit values to ascii string name */
0ad78200 280static const struct {
1da177e4
LT		 281 u32 value;
282 char *name;
a53eb5e0
JS		 283} fc_port_role_names[] = {
284 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
285 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
286 { FC_PORT_ROLE_IP_PORT, "IP Port" },
1da177e4 287};
a53eb5e0 288fc_bitfield_name_search(port_roles, fc_port_role_names)
1da177e4
LT		 289
290/*
291 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
292 */
293#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
294#define FC_WELLKNOWN_ROLE_MASK 0x00000f
295#define FC_FPORT_PORTID 0x00000e
296#define FC_FABCTLR_PORTID 0x00000d
297#define FC_DIRSRVR_PORTID 0x00000c
298#define FC_TIMESRVR_PORTID 0x00000b
299#define FC_MGMTSRVR_PORTID 0x00000a
300
301
c4028958
DH		 302static void fc_timeout_deleted_rport(struct work_struct *work);
303static void fc_timeout_fail_rport_io(struct work_struct *work);
304static void fc_scsi_scan_rport(struct work_struct *work);
1da177e4
LT		 305
306/*
307 * Attribute counts pre object type...
308 * Increase these values if you add attributes
309 */
310#define FC_STARGET_NUM_ATTRS 3
0f29b966 311#define FC_RPORT_NUM_ATTRS 10
a53eb5e0
JS		 312#define FC_VPORT_NUM_ATTRS 9
313#define FC_HOST_NUM_ATTRS 21
1da177e4
LT		 314
315struct fc_internal {
316 struct scsi_transport_template t;
317 struct fc_function_template *f;
318
319 /*
320 * For attributes : each object has :
321 * An array of the actual attributes structures
322 * An array of null-terminated pointers to the attribute
323 * structures - used for mid-layer interaction.
324 *
325 * The attribute containers for the starget and host are are
326 * part of the midlayer. As the remote port is specific to the
327 * fc transport, we must provide the attribute container.
328 */
ee959b00 329 struct device_attribute private_starget_attrs[
1da177e4 330 FC_STARGET_NUM_ATTRS];
ee959b00 331 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
1da177e4 332
ee959b00
TJ		 333 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
334 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
1da177e4
LT		 335
336 struct transport_container rport_attr_cont;
ee959b00
TJ		 337 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
338 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
a53eb5e0
JS		 339
340 struct transport_container vport_attr_cont;
ee959b00
TJ		 341 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
342 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
1da177e4
LT		 343};
344
345#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
346
d0a7e574 347static int fc_target_setup(struct transport_container *tc, struct device *dev,
ee959b00 348 struct device *cdev)
1da177e4
LT		 349{
350 struct scsi_target *starget = to_scsi_target(dev);
351 struct fc_rport *rport = starget_to_rport(starget);
352
353 /*
354 * if parent is remote port, use values from remote port.
355 * Otherwise, this host uses the fc_transport, but not the
356 * remote port interface. As such, initialize to known non-values.
357 */
358 if (rport) {
359 fc_starget_node_name(starget) = rport->node_name;
360 fc_starget_port_name(starget) = rport->port_name;
361 fc_starget_port_id(starget) = rport->port_id;
362 } else {
363 fc_starget_node_name(starget) = -1;
364 fc_starget_port_name(starget) = -1;
365 fc_starget_port_id(starget) = -1;
366 }
367
368 return 0;
369}
370
371static DECLARE_TRANSPORT_CLASS(fc_transport_class,
372 "fc_transport",
373 fc_target_setup,
374 NULL,
375 NULL);
376
d0a7e574 377static int fc_host_setup(struct transport_container *tc, struct device *dev,
ee959b00 378 struct device *cdev)
1da177e4
LT		 379{
380 struct Scsi_Host *shost = dev_to_shost(dev);
aedf3497 381 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4 382
9ef3e4a4 383 /*
1da177e4
LT		 384 * Set default values easily detected by the midlayer as
385 * failure cases. The scsi lldd is responsible for initializing
386 * all transport attributes to valid values per host.
387 */
aedf3497
JS		 388 fc_host->node_name = -1;
389 fc_host->port_name = -1;
390 fc_host->permanent_port_name = -1;
391 fc_host->supported_classes = FC_COS_UNSPECIFIED;
392 memset(fc_host->supported_fc4s, 0,
393 sizeof(fc_host->supported_fc4s));
aedf3497
JS		 394 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
395 fc_host->maxframe_size = -1;
a53eb5e0 396 fc_host->max_npiv_vports = 0;
aedf3497
JS		 397 memset(fc_host->serial_number, 0,
398 sizeof(fc_host->serial_number));
399
400 fc_host->port_id = -1;
401 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
402 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
403 memset(fc_host->active_fc4s, 0,
404 sizeof(fc_host->active_fc4s));
405 fc_host->speed = FC_PORTSPEED_UNKNOWN;
406 fc_host->fabric_name = -1;
b8d08210
JS		 407 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
408 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
aedf3497
JS		 409
410 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
411
412 INIT_LIST_HEAD(&fc_host->rports);
413 INIT_LIST_HEAD(&fc_host->rport_bindings);
a53eb5e0 414 INIT_LIST_HEAD(&fc_host->vports);
aedf3497
JS		 415 fc_host->next_rport_number = 0;
416 fc_host->next_target_id = 0;
a53eb5e0
JS		 417 fc_host->next_vport_number = 0;
418 fc_host->npiv_vports_inuse = 0;
aedf3497
JS		 419
420 snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d",
421 shost->host_no);
422 fc_host->work_q = create_singlethread_workqueue(
423 fc_host->work_q_name);
424 if (!fc_host->work_q)
425 return -ENOMEM;
426
427 snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d",
428 shost->host_no);
429 fc_host->devloss_work_q = create_singlethread_workqueue(
430 fc_host->devloss_work_q_name);
431 if (!fc_host->devloss_work_q) {
432 destroy_workqueue(fc_host->work_q);
433 fc_host->work_q = NULL;
434 return -ENOMEM;
435 }
436
1da177e4
LT		 437 return 0;
438}
439
440static DECLARE_TRANSPORT_CLASS(fc_host_class,
441 "fc_host",
442 fc_host_setup,
443 NULL,
444 NULL);
445
446/*
447 * Setup and Remove actions for remote ports are handled
448 * in the service functions below.
449 */
450static DECLARE_TRANSPORT_CLASS(fc_rport_class,
451 "fc_remote_ports",
452 NULL,
453 NULL,
454 NULL);
455
a53eb5e0
JS		 456/*
457 * Setup and Remove actions for virtual ports are handled
458 * in the service functions below.
459 */
460static DECLARE_TRANSPORT_CLASS(fc_vport_class,
461 "fc_vports",
462 NULL,
463 NULL,
464 NULL);
465
1da177e4
LT		 466/*
467 * Module Parameters
468 */
469
470/*
471 * dev_loss_tmo: the default number of seconds that the FC transport
472 * should insulate the loss of a remote port.
473 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
474 */
1c9e16e4 475static unsigned int fc_dev_loss_tmo = 60; /* seconds */
1da177e4 476
10f4b89a 477module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
1da177e4
LT		 478MODULE_PARM_DESC(dev_loss_tmo,
479 "Maximum number of seconds that the FC transport should"
480 " insulate the loss of a remote port. Once this value is"
481 " exceeded, the scsi target is removed. Value should be"
482 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
483
eb44820c 484/*
84314fd4 485 * Netlink Infrastructure
eb44820c 486 */
84314fd4
JS		 487
488static atomic_t fc_event_seq;
489
490/**
491 * fc_get_event_number - Obtain the next sequential FC event number
492 *
493 * Notes:
eb44820c 494 * We could have inlined this, but it would have required fc_event_seq to
84314fd4
JS		 495 * be exposed. For now, live with the subroutine call.
496 * Atomic used to avoid lock/unlock...
eb44820c 497 */
84314fd4
JS		 498u32
499fc_get_event_number(void)
500{
501 return atomic_add_return(1, &fc_event_seq);
502}
503EXPORT_SYMBOL(fc_get_event_number);
504
505
506/**
507 * fc_host_post_event - called to post an even on an fc_host.
84314fd4
JS		 508 * @shost: host the event occurred on
509 * @event_number: fc event number obtained from get_fc_event_number()
510 * @event_code: fc_host event being posted
511 * @event_data: 32bits of data for the event being posted
512 *
513 * Notes:
514 * This routine assumes no locks are held on entry.
eb44820c 515 */
84314fd4
JS		 516void
517fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
518 enum fc_host_event_code event_code, u32 event_data)
519{
520 struct sk_buff *skb;
521 struct nlmsghdr *nlh;
522 struct fc_nl_event *event;
523 const char *name;
524 u32 len, skblen;
525 int err;
526
527 if (!scsi_nl_sock) {
528 err = -ENOENT;
529 goto send_fail;
530 }
531
532 len = FC_NL_MSGALIGN(sizeof(*event));
533 skblen = NLMSG_SPACE(len);
534
535 skb = alloc_skb(skblen, GFP_KERNEL);
536 if (!skb) {
537 err = -ENOBUFS;
538 goto send_fail;
539 }
540
541 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
542 skblen - sizeof(*nlh), 0);
543 if (!nlh) {
544 err = -ENOBUFS;
545 goto send_fail_skb;
546 }
547 event = NLMSG_DATA(nlh);
548
549 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
550 FC_NL_ASYNC_EVENT, len);
551 event->seconds = get_seconds();
552 event->vendor_id = 0;
553 event->host_no = shost->host_no;
554 event->event_datalen = sizeof(u32); /* bytes */
555 event->event_num = event_number;
556 event->event_code = event_code;
557 event->event_data = event_data;
558
1b73c4bb
JB		 559 err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
560 GFP_KERNEL);
84314fd4
JS		 561 if (err && (err != -ESRCH)) /* filter no recipient errors */
562 /* nlmsg_multicast already kfree_skb'd */
563 goto send_fail;
564
565 return;
566
567send_fail_skb:
568 kfree_skb(skb);
569send_fail:
570 name = get_fc_host_event_code_name(event_code);
571 printk(KERN_WARNING
572 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
573 __FUNCTION__, shost->host_no,
574 (name) ? name : "<unknown>", event_data, err);
575 return;
576}
577EXPORT_SYMBOL(fc_host_post_event);
578
579
580/**
eb44820c 581 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
84314fd4
JS		 582 * @shost: host the event occurred on
583 * @event_number: fc event number obtained from get_fc_event_number()
584 * @data_len: amount, in bytes, of vendor unique data
585 * @data_buf: pointer to vendor unique data
eb44820c 586 * @vendor_id: Vendor id
84314fd4
JS		 587 *
588 * Notes:
589 * This routine assumes no locks are held on entry.
eb44820c 590 */
84314fd4
JS		 591void
592fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
f14e2e29 593 u32 data_len, char * data_buf, u64 vendor_id)
84314fd4
JS		 594{
595 struct sk_buff *skb;
596 struct nlmsghdr *nlh;
597 struct fc_nl_event *event;
598 u32 len, skblen;
599 int err;
600
601 if (!scsi_nl_sock) {
602 err = -ENOENT;
603 goto send_vendor_fail;
604 }
605
606 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
607 skblen = NLMSG_SPACE(len);
608
609 skb = alloc_skb(skblen, GFP_KERNEL);
610 if (!skb) {
611 err = -ENOBUFS;
612 goto send_vendor_fail;
613 }
614
615 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
616 skblen - sizeof(*nlh), 0);
617 if (!nlh) {
618 err = -ENOBUFS;
619 goto send_vendor_fail_skb;
620 }
621 event = NLMSG_DATA(nlh);
622
623 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
624 FC_NL_ASYNC_EVENT, len);
625 event->seconds = get_seconds();
626 event->vendor_id = vendor_id;
627 event->host_no = shost->host_no;
628 event->event_datalen = data_len; /* bytes */
629 event->event_num = event_number;
630 event->event_code = FCH_EVT_VENDOR_UNIQUE;
631 memcpy(&event->event_data, data_buf, data_len);
632
1b73c4bb
JB		 633 err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
634 GFP_KERNEL);
84314fd4
JS		 635 if (err && (err != -ESRCH)) /* filter no recipient errors */
636 /* nlmsg_multicast already kfree_skb'd */
637 goto send_vendor_fail;
638
639 return;
640
641send_vendor_fail_skb:
642 kfree_skb(skb);
643send_vendor_fail:
644 printk(KERN_WARNING
645 "%s: Dropped Event : host %d vendor_unique - err %d\n",
646 __FUNCTION__, shost->host_no, err);
647 return;
648}
649EXPORT_SYMBOL(fc_host_post_vendor_event);
650
651
1da177e4
LT		 652
653static __init int fc_transport_init(void)
654{
84314fd4
JS		 655 int error;
656
657 atomic_set(&fc_event_seq, 0);
658
659 error = transport_class_register(&fc_host_class);
a53eb5e0
JS		 660 if (error)
661 return error;
662 error = transport_class_register(&fc_vport_class);
1da177e4
LT		 663 if (error)
664 return error;
665 error = transport_class_register(&fc_rport_class);
666 if (error)
667 return error;
668 return transport_class_register(&fc_transport_class);
669}
670
671static void __exit fc_transport_exit(void)
672{
673 transport_class_unregister(&fc_transport_class);
674 transport_class_unregister(&fc_rport_class);
675 transport_class_unregister(&fc_host_class);
a53eb5e0 676 transport_class_unregister(&fc_vport_class);
1da177e4
LT		 677}
678
679/*
680 * FC Remote Port Attribute Management
681 */
682
683#define fc_rport_show_function(field, format_string, sz, cast) \
684static ssize_t \
ee959b00
TJ		 685show_fc_rport_##field (struct device *dev, \
686 struct device_attribute *attr, char *buf) \
1da177e4 687{ \
ee959b00 688 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 689 struct Scsi_Host *shost = rport_to_shost(rport); \
690 struct fc_internal *i = to_fc_internal(shost->transportt); \
19a7b4ae
JSEC		 691 if ((i->f->get_rport_##field) && \
692 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 693 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae 694 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
1da177e4
LT		 695 i->f->get_rport_##field(rport); \
696 return snprintf(buf, sz, format_string, cast rport->field); \
697}
698
699#define fc_rport_store_function(field) \
700static ssize_t \
ee959b00
TJ		 701store_fc_rport_##field(struct device *dev, \
702 struct device_attribute *attr, \
703 const char *buf, size_t count) \
1da177e4
LT		 704{ \
705 int val; \
ee959b00 706 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 707 struct Scsi_Host *shost = rport_to_shost(rport); \
708 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 709 char *cp; \
19a7b4ae 710 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 711 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae
JSEC		 712 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
713 return -EBUSY; \
0f29b966
JS		 714 val = simple_strtoul(buf, &cp, 0); \
715 if (*cp && (*cp != '\n')) \
716 return -EINVAL; \
1da177e4
LT		 717 i->f->set_rport_##field(rport, val); \
718 return count; \
719}
720
721#define fc_rport_rd_attr(field, format_string, sz) \
722 fc_rport_show_function(field, format_string, sz, ) \
ee959b00 723static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 724 show_fc_rport_##field, NULL)
725
726#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
727 fc_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 728static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 729 show_fc_rport_##field, NULL)
730
731#define fc_rport_rw_attr(field, format_string, sz) \
732 fc_rport_show_function(field, format_string, sz, ) \
733 fc_rport_store_function(field) \
ee959b00 734static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 735 show_fc_rport_##field, \
736 store_fc_rport_##field)
737
738
739#define fc_private_rport_show_function(field, format_string, sz, cast) \
740static ssize_t \
ee959b00
TJ		 741show_fc_rport_##field (struct device *dev, \
742 struct device_attribute *attr, char *buf) \
1da177e4 743{ \
ee959b00 744 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 745 return snprintf(buf, sz, format_string, cast rport->field); \
746}
747
748#define fc_private_rport_rd_attr(field, format_string, sz) \
749 fc_private_rport_show_function(field, format_string, sz, ) \
ee959b00 750static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 751 show_fc_rport_##field, NULL)
752
753#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
754 fc_private_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 755static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 756 show_fc_rport_##field, NULL)
757
758
759#define fc_private_rport_rd_enum_attr(title, maxlen) \
760static ssize_t \
ee959b00
TJ		 761show_fc_rport_##title (struct device *dev, \
762 struct device_attribute *attr, char *buf) \
1da177e4 763{ \
ee959b00 764 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 765 const char *name; \
766 name = get_fc_##title##_name(rport->title); \
767 if (!name) \
768 return -EINVAL; \
769 return snprintf(buf, maxlen, "%s\n", name); \
770} \
ee959b00 771static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1da177e4
LT		 772 show_fc_rport_##title, NULL)
773
774
775#define SETUP_RPORT_ATTRIBUTE_RD(field) \
ee959b00 776 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 777 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
778 i->private_rport_attrs[count].store = NULL; \
779 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
780 if (i->f->show_rport_##field) \
781 count++
782
783#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
ee959b00 784 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 785 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
786 i->private_rport_attrs[count].store = NULL; \
787 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
788 count++
789
790#define SETUP_RPORT_ATTRIBUTE_RW(field) \
ee959b00 791 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 792 if (!i->f->set_rport_##field) { \
793 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
794 i->private_rport_attrs[count].store = NULL; \
795 } \
796 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
797 if (i->f->show_rport_##field) \
798 count++
799
0f29b966
JS		 800#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
801{ \
ee959b00 802 i->private_rport_attrs[count] = device_attr_rport_##field; \
0f29b966
JS		 803 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
804 count++; \
805}
806
1da177e4
LT		 807
808/* The FC Transport Remote Port Attributes: */
809
810/* Fixed Remote Port Attributes */
811
812fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
813
814static ssize_t
ee959b00
TJ		 815show_fc_rport_supported_classes (struct device *dev,
816 struct device_attribute *attr, char *buf)
1da177e4 817{
ee959b00 818 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 819 if (rport->supported_classes == FC_COS_UNSPECIFIED)
820 return snprintf(buf, 20, "unspecified\n");
821 return get_fc_cos_names(rport->supported_classes, buf);
822}
ee959b00 823static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1da177e4
LT		 824 show_fc_rport_supported_classes, NULL);
825
826/* Dynamic Remote Port Attributes */
827
19a7b4ae
JSEC		 828/*
829 * dev_loss_tmo attribute
830 */
831fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
832static ssize_t
ee959b00
TJ		 833store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
834 const char *buf, size_t count)
19a7b4ae
JSEC		 835{
836 int val;
ee959b00 837 struct fc_rport *rport = transport_class_to_rport(dev);
19a7b4ae
JSEC		 838 struct Scsi_Host *shost = rport_to_shost(rport);
839 struct fc_internal *i = to_fc_internal(shost->transportt);
0f29b966 840 char *cp;
19a7b4ae 841 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
42e33148 842 (rport->port_state == FC_PORTSTATE_DELETED) ||
19a7b4ae
JSEC		 843 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
844 return -EBUSY;
0f29b966
JS		 845 val = simple_strtoul(buf, &cp, 0);
846 if ((*cp && (*cp != '\n')) ||
847 (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
19a7b4ae
JSEC		 848 return -EINVAL;
849 i->f->set_rport_dev_loss_tmo(rport, val);
850 return count;
851}
ee959b00 852static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
19a7b4ae 853 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1da177e4
LT		 854
855
856/* Private Remote Port Attributes */
857
858fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
859fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
860fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
861
862static ssize_t
ee959b00
TJ		 863show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
864 char *buf)
1da177e4 865{
ee959b00 866 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 867
868 /* identify any roles that are port_id specific */
869 if ((rport->port_id != -1) &&
870 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
871 FC_WELLKNOWN_PORTID_MASK) {
872 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
873 case FC_FPORT_PORTID:
874 return snprintf(buf, 30, "Fabric Port\n");
875 case FC_FABCTLR_PORTID:
876 return snprintf(buf, 30, "Fabric Controller\n");
877 case FC_DIRSRVR_PORTID:
878 return snprintf(buf, 30, "Directory Server\n");
879 case FC_TIMESRVR_PORTID:
880 return snprintf(buf, 30, "Time Server\n");
881 case FC_MGMTSRVR_PORTID:
882 return snprintf(buf, 30, "Management Server\n");
883 default:
884 return snprintf(buf, 30, "Unknown Fabric Entity\n");
885 }
886 } else {
a53eb5e0 887 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1da177e4 888 return snprintf(buf, 20, "unknown\n");
a53eb5e0 889 return get_fc_port_roles_names(rport->roles, buf);
1da177e4
LT		 890 }
891}
ee959b00 892static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1da177e4
LT		 893 show_fc_rport_roles, NULL);
894
895fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
896fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
897
0f29b966
JS		 898/*
899 * fast_io_fail_tmo attribute
900 */
901static ssize_t
ee959b00
TJ		 902show_fc_rport_fast_io_fail_tmo (struct device *dev,
903 struct device_attribute *attr, char *buf)
0f29b966 904{
ee959b00 905 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 906
907 if (rport->fast_io_fail_tmo == -1)
908 return snprintf(buf, 5, "off\n");
909 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
910}
911
912static ssize_t
ee959b00
TJ		 913store_fc_rport_fast_io_fail_tmo(struct device *dev,
914 struct device_attribute *attr, const char *buf,
915 size_t count)
0f29b966
JS		 916{
917 int val;
918 char *cp;
ee959b00 919 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 920
921 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
922 (rport->port_state == FC_PORTSTATE_DELETED) ||
923 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
924 return -EBUSY;
925 if (strncmp(buf, "off", 3) == 0)
926 rport->fast_io_fail_tmo = -1;
927 else {
928 val = simple_strtoul(buf, &cp, 0);
929 if ((*cp && (*cp != '\n')) ||
930 (val < 0) || (val >= rport->dev_loss_tmo))
931 return -EINVAL;
932 rport->fast_io_fail_tmo = val;
933 }
934 return count;
935}
ee959b00 936static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
0f29b966 937 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1da177e4
LT		 938
939
940/*
941 * FC SCSI Target Attribute Management
942 */
943
944/*
945 * Note: in the target show function we recognize when the remote
a53eb5e0 946 * port is in the heirarchy and do not allow the driver to get
1da177e4
LT		 947 * involved in sysfs functions. The driver only gets involved if
948 * it's the "old" style that doesn't use rports.
949 */
950#define fc_starget_show_function(field, format_string, sz, cast) \
951static ssize_t \
ee959b00
TJ		 952show_fc_starget_##field (struct device *dev, \
953 struct device_attribute *attr, char *buf) \
1da177e4 954{ \
ee959b00 955 struct scsi_target *starget = transport_class_to_starget(dev); \
1da177e4
LT		 956 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
957 struct fc_internal *i = to_fc_internal(shost->transportt); \
958 struct fc_rport *rport = starget_to_rport(starget); \
959 if (rport) \
960 fc_starget_##field(starget) = rport->field; \
961 else if (i->f->get_starget_##field) \
962 i->f->get_starget_##field(starget); \
963 return snprintf(buf, sz, format_string, \
964 cast fc_starget_##field(starget)); \
965}
966
967#define fc_starget_rd_attr(field, format_string, sz) \
968 fc_starget_show_function(field, format_string, sz, ) \
ee959b00 969static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 970 show_fc_starget_##field, NULL)
971
972#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
973 fc_starget_show_function(field, format_string, sz, (cast)) \
ee959b00 974static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 975 show_fc_starget_##field, NULL)
976
977#define SETUP_STARGET_ATTRIBUTE_RD(field) \
ee959b00 978 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 979 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
980 i->private_starget_attrs[count].store = NULL; \
981 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
982 if (i->f->show_starget_##field) \
983 count++
984
985#define SETUP_STARGET_ATTRIBUTE_RW(field) \
ee959b00 986 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 987 if (!i->f->set_starget_##field) { \
988 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
989 i->private_starget_attrs[count].store = NULL; \
990 } \
991 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
992 if (i->f->show_starget_##field) \
993 count++
994
995/* The FC Transport SCSI Target Attributes: */
996fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
997fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
998fc_starget_rd_attr(port_id, "0x%06x\n", 20);
999
1000
a53eb5e0
JS		 1001/*
1002 * FC Virtual Port Attribute Management
1003 */
1004
1005#define fc_vport_show_function(field, format_string, sz, cast) \
1006static ssize_t \
ee959b00
TJ		 1007show_fc_vport_##field (struct device *dev, \
1008 struct device_attribute *attr, char *buf) \
a53eb5e0 1009{ \
ee959b00 1010 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1011 struct Scsi_Host *shost = vport_to_shost(vport); \
1012 struct fc_internal *i = to_fc_internal(shost->transportt); \
1013 if ((i->f->get_vport_##field) && \
1014 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1015 i->f->get_vport_##field(vport); \
1016 return snprintf(buf, sz, format_string, cast vport->field); \
1017}
1018
1019#define fc_vport_store_function(field) \
1020static ssize_t \
ee959b00
TJ		 1021store_fc_vport_##field(struct device *dev, \
1022 struct device_attribute *attr, \
1023 const char *buf, size_t count) \
a53eb5e0
JS		 1024{ \
1025 int val; \
ee959b00 1026 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1027 struct Scsi_Host *shost = vport_to_shost(vport); \
1028 struct fc_internal *i = to_fc_internal(shost->transportt); \
1029 char *cp; \
1030 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1031 return -EBUSY; \
1032 val = simple_strtoul(buf, &cp, 0); \
1033 if (*cp && (*cp != '\n')) \
1034 return -EINVAL; \
1035 i->f->set_vport_##field(vport, val); \
1036 return count; \
1037}
1038
1039#define fc_vport_store_str_function(field, slen) \
1040static ssize_t \
ee959b00
TJ		 1041store_fc_vport_##field(struct device *dev, \
1042 struct device_attribute *attr, \
1043 const char *buf, size_t count) \
a53eb5e0 1044{ \
ee959b00 1045 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1046 struct Scsi_Host *shost = vport_to_shost(vport); \
1047 struct fc_internal *i = to_fc_internal(shost->transportt); \
1048 unsigned int cnt=count; \
1049 \
1050 /* count may include a LF at end of string */ \
1051 if (buf[cnt-1] == '\n') \
1052 cnt--; \
1053 if (cnt > ((slen) - 1)) \
1054 return -EINVAL; \
1055 memcpy(vport->field, buf, cnt); \
1056 i->f->set_vport_##field(vport); \
1057 return count; \
1058}
1059
1060#define fc_vport_rd_attr(field, format_string, sz) \
1061 fc_vport_show_function(field, format_string, sz, ) \
ee959b00 1062static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1063 show_fc_vport_##field, NULL)
1064
1065#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1066 fc_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1067static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1068 show_fc_vport_##field, NULL)
1069
1070#define fc_vport_rw_attr(field, format_string, sz) \
1071 fc_vport_show_function(field, format_string, sz, ) \
1072 fc_vport_store_function(field) \
ee959b00 1073static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1074 show_fc_vport_##field, \
1075 store_fc_vport_##field)
1076
1077#define fc_private_vport_show_function(field, format_string, sz, cast) \
1078static ssize_t \
ee959b00
TJ		 1079show_fc_vport_##field (struct device *dev, \
1080 struct device_attribute *attr, char *buf) \
a53eb5e0 1081{ \
ee959b00 1082 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1083 return snprintf(buf, sz, format_string, cast vport->field); \
1084}
1085
1086#define fc_private_vport_store_u32_function(field) \
1087static ssize_t \
ee959b00
TJ		 1088store_fc_vport_##field(struct device *dev, \
1089 struct device_attribute *attr, \
1090 const char *buf, size_t count) \
a53eb5e0
JS		 1091{ \
1092 u32 val; \
ee959b00 1093 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1094 char *cp; \
1095 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1096 return -EBUSY; \
1097 val = simple_strtoul(buf, &cp, 0); \
1098 if (*cp && (*cp != '\n')) \
1099 return -EINVAL; \
1100 vport->field = val; \
1101 return count; \
1102}
1103
1104
1105#define fc_private_vport_rd_attr(field, format_string, sz) \
1106 fc_private_vport_show_function(field, format_string, sz, ) \
ee959b00 1107static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1108 show_fc_vport_##field, NULL)
1109
1110#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1111 fc_private_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1112static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1113 show_fc_vport_##field, NULL)
1114
1115#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1116 fc_private_vport_show_function(field, format_string, sz, ) \
1117 fc_private_vport_store_u32_function(field) \
ee959b00 1118static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1119 show_fc_vport_##field, \
1120 store_fc_vport_##field)
1121
1122
1123#define fc_private_vport_rd_enum_attr(title, maxlen) \
1124static ssize_t \
ee959b00
TJ		 1125show_fc_vport_##title (struct device *dev, \
1126 struct device_attribute *attr, \
1127 char *buf) \
a53eb5e0 1128{ \
ee959b00 1129 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1130 const char *name; \
1131 name = get_fc_##title##_name(vport->title); \
1132 if (!name) \
1133 return -EINVAL; \
1134 return snprintf(buf, maxlen, "%s\n", name); \
1135} \
ee959b00 1136static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
a53eb5e0
JS		 1137 show_fc_vport_##title, NULL)
1138
1139
1140#define SETUP_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1141 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1142 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1143 i->private_vport_attrs[count].store = NULL; \
1144 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1145 if (i->f->get_##field) \
1146 count++
1147 /* NOTE: Above MACRO differs: checks function not show bit */
1148
1149#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1150 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1151 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1152 i->private_vport_attrs[count].store = NULL; \
1153 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1154 count++
1155
1156#define SETUP_VPORT_ATTRIBUTE_WR(field) \
ee959b00 1157 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1158 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1159 if (i->f->field) \
1160 count++
1161 /* NOTE: Above MACRO differs: checks function */
1162
1163#define SETUP_VPORT_ATTRIBUTE_RW(field) \
ee959b00 1164 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1165 if (!i->f->set_vport_##field) { \
1166 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1167 i->private_vport_attrs[count].store = NULL; \
1168 } \
1169 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1170 count++
1171 /* NOTE: Above MACRO differs: does not check show bit */
1172
1173#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1174{ \
ee959b00 1175 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1176 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1177 count++; \
1178}
1179
1180
1181/* The FC Transport Virtual Port Attributes: */
1182
1183/* Fixed Virtual Port Attributes */
1184
1185/* Dynamic Virtual Port Attributes */
1186
1187/* Private Virtual Port Attributes */
1188
1189fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1190fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1191fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1192fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1193
1194static ssize_t
ee959b00
TJ		 1195show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1196 char *buf)
a53eb5e0 1197{
ee959b00 1198 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1199
1200 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1201 return snprintf(buf, 20, "unknown\n");
1202 return get_fc_port_roles_names(vport->roles, buf);
1203}
ee959b00 1204static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
a53eb5e0
JS		 1205
1206fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1207
1208fc_private_vport_show_function(symbolic_name, "%s\n",
1209 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1210fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
ee959b00 1211static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
a53eb5e0
JS		 1212 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1213
1214static ssize_t
ee959b00
TJ		 1215store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1216 const char *buf, size_t count)
a53eb5e0 1217{
ee959b00 1218 struct fc_vport *vport = transport_class_to_vport(dev);
9ef3e4a4 1219 struct Scsi_Host *shost = vport_to_shost(vport);
a53eb5e0 1220
9ef3e4a4 1221 fc_queue_work(shost, &vport->vport_delete_work);
a53eb5e0
JS		 1222 return count;
1223}
ee959b00 1224static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
a53eb5e0
JS		 1225 NULL, store_fc_vport_delete);
1226
1227
1228/*
1229 * Enable/Disable vport
1230 * Write "1" to disable, write "0" to enable
1231 */
1232static ssize_t
ee959b00
TJ		 1233store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1234 const char *buf,
a53eb5e0
JS		 1235 size_t count)
1236{
ee959b00 1237 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1238 struct Scsi_Host *shost = vport_to_shost(vport);
1239 struct fc_internal *i = to_fc_internal(shost->transportt);
1240 int stat;
1241
1242 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1243 return -EBUSY;
1244
1245 if (*buf == '0') {
1246 if (vport->vport_state != FC_VPORT_DISABLED)
1247 return -EALREADY;
1248 } else if (*buf == '1') {
1249 if (vport->vport_state == FC_VPORT_DISABLED)
1250 return -EALREADY;
1251 } else
1252 return -EINVAL;
1253
1254 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1255 return stat ? stat : count;
1256}
ee959b00 1257static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
a53eb5e0
JS		 1258 NULL, store_fc_vport_disable);
1259
1260
1da177e4
LT		 1261/*
1262 * Host Attribute Management
1263 */
1264
1265#define fc_host_show_function(field, format_string, sz, cast) \
1266static ssize_t \
ee959b00
TJ		 1267show_fc_host_##field (struct device *dev, \
1268 struct device_attribute *attr, char *buf) \
1da177e4 1269{ \
ee959b00 1270 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1271 struct fc_internal *i = to_fc_internal(shost->transportt); \
1272 if (i->f->get_host_##field) \
1273 i->f->get_host_##field(shost); \
1274 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1275}
1276
1277#define fc_host_store_function(field) \
1278static ssize_t \
ee959b00
TJ		 1279store_fc_host_##field(struct device *dev, \
1280 struct device_attribute *attr, \
1281 const char *buf, size_t count) \
1da177e4
LT		 1282{ \
1283 int val; \
ee959b00 1284 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4 1285 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 1286 char *cp; \
1da177e4 1287 \
0f29b966
JS		 1288 val = simple_strtoul(buf, &cp, 0); \
1289 if (*cp && (*cp != '\n')) \
1290 return -EINVAL; \
1da177e4
LT		 1291 i->f->set_host_##field(shost, val); \
1292 return count; \
1293}
1294
b8d08210
JS		 1295#define fc_host_store_str_function(field, slen) \
1296static ssize_t \
ee959b00
TJ		 1297store_fc_host_##field(struct device *dev, \
1298 struct device_attribute *attr, \
1299 const char *buf, size_t count) \
b8d08210 1300{ \
ee959b00 1301 struct Scsi_Host *shost = transport_class_to_shost(dev); \
b8d08210
JS		 1302 struct fc_internal *i = to_fc_internal(shost->transportt); \
1303 unsigned int cnt=count; \
1304 \
1305 /* count may include a LF at end of string */ \
1306 if (buf[cnt-1] == '\n') \
1307 cnt--; \
1308 if (cnt > ((slen) - 1)) \
1309 return -EINVAL; \
1310 memcpy(fc_host_##field(shost), buf, cnt); \
1311 i->f->set_host_##field(shost); \
1312 return count; \
1313}
1314
1da177e4
LT		 1315#define fc_host_rd_attr(field, format_string, sz) \
1316 fc_host_show_function(field, format_string, sz, ) \
ee959b00 1317static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1318 show_fc_host_##field, NULL)
1319
1320#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1321 fc_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1322static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1323 show_fc_host_##field, NULL)
1324
1325#define fc_host_rw_attr(field, format_string, sz) \
1326 fc_host_show_function(field, format_string, sz, ) \
1327 fc_host_store_function(field) \
ee959b00 1328static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 1329 show_fc_host_##field, \
1330 store_fc_host_##field)
1331
1332#define fc_host_rd_enum_attr(title, maxlen) \
1333static ssize_t \
ee959b00
TJ		 1334show_fc_host_##title (struct device *dev, \
1335 struct device_attribute *attr, char *buf) \
1da177e4 1336{ \
ee959b00 1337 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1338 struct fc_internal *i = to_fc_internal(shost->transportt); \
1339 const char *name; \
1340 if (i->f->get_host_##title) \
1341 i->f->get_host_##title(shost); \
1342 name = get_fc_##title##_name(fc_host_##title(shost)); \
1343 if (!name) \
1344 return -EINVAL; \
1345 return snprintf(buf, maxlen, "%s\n", name); \
1346} \
ee959b00 1347static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1da177e4
LT		 1348
1349#define SETUP_HOST_ATTRIBUTE_RD(field) \
ee959b00 1350 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1351 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1352 i->private_host_attrs[count].store = NULL; \
1353 i->host_attrs[count] = &i->private_host_attrs[count]; \
1354 if (i->f->show_host_##field) \
1355 count++
1356
a53eb5e0 1357#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
ee959b00 1358 i->private_host_attrs[count] = device_attr_host_##field; \
a53eb5e0
JS		 1359 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1360 i->private_host_attrs[count].store = NULL; \
1361 i->host_attrs[count] = &i->private_host_attrs[count]; \
1362 count++
1363
1da177e4 1364#define SETUP_HOST_ATTRIBUTE_RW(field) \
ee959b00 1365 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1366 if (!i->f->set_host_##field) { \
1367 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1368 i->private_host_attrs[count].store = NULL; \
1369 } \
1370 i->host_attrs[count] = &i->private_host_attrs[count]; \
1371 if (i->f->show_host_##field) \
1372 count++
1373
1374
1375#define fc_private_host_show_function(field, format_string, sz, cast) \
1376static ssize_t \
ee959b00
TJ		 1377show_fc_host_##field (struct device *dev, \
1378 struct device_attribute *attr, char *buf) \
1da177e4 1379{ \
ee959b00 1380 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1381 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1382}
1383
1384#define fc_private_host_rd_attr(field, format_string, sz) \
1385 fc_private_host_show_function(field, format_string, sz, ) \
ee959b00 1386static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1387 show_fc_host_##field, NULL)
1388
1389#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1390 fc_private_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1391static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1392 show_fc_host_##field, NULL)
1393
1394#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
ee959b00 1395 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1396 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1397 i->private_host_attrs[count].store = NULL; \
1398 i->host_attrs[count] = &i->private_host_attrs[count]; \
1399 count++
1400
1401#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
91ca7b01 1402{ \
ee959b00 1403 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4 1404 i->host_attrs[count] = &i->private_host_attrs[count]; \
91ca7b01
AV		 1405 count++; \
1406}
1da177e4
LT		 1407
1408
1409/* Fixed Host Attributes */
1410
1411static ssize_t
ee959b00
TJ		 1412show_fc_host_supported_classes (struct device *dev,
1413 struct device_attribute *attr, char *buf)
1da177e4 1414{
ee959b00 1415 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1416
1417 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1418 return snprintf(buf, 20, "unspecified\n");
1419
1420 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1421}
ee959b00 1422static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1da177e4
LT		 1423 show_fc_host_supported_classes, NULL);
1424
1425static ssize_t
ee959b00
TJ		 1426show_fc_host_supported_fc4s (struct device *dev,
1427 struct device_attribute *attr, char *buf)
1da177e4 1428{
ee959b00 1429 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1430 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1431}
ee959b00 1432static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1da177e4
LT		 1433 show_fc_host_supported_fc4s, NULL);
1434
1435static ssize_t
ee959b00
TJ		 1436show_fc_host_supported_speeds (struct device *dev,
1437 struct device_attribute *attr, char *buf)
1da177e4 1438{
ee959b00 1439 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1440
1441 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1442 return snprintf(buf, 20, "unknown\n");
1443
1444 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1445}
ee959b00 1446static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1da177e4
LT		 1447 show_fc_host_supported_speeds, NULL);
1448
1449
1450fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1451fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
6b7281d0
AH		 1452fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1453 unsigned long long);
1da177e4 1454fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
a53eb5e0 1455fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1da177e4
LT		 1456fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1457
1458
1459/* Dynamic Host Attributes */
1460
1461static ssize_t
ee959b00
TJ		 1462show_fc_host_active_fc4s (struct device *dev,
1463 struct device_attribute *attr, char *buf)
1da177e4 1464{
ee959b00 1465 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1466 struct fc_internal *i = to_fc_internal(shost->transportt);
1467
1468 if (i->f->get_host_active_fc4s)
1469 i->f->get_host_active_fc4s(shost);
1470
1471 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1472}
ee959b00 1473static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1da177e4
LT		 1474 show_fc_host_active_fc4s, NULL);
1475
1476static ssize_t
ee959b00
TJ		 1477show_fc_host_speed (struct device *dev,
1478 struct device_attribute *attr, char *buf)
1da177e4 1479{
ee959b00 1480 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1481 struct fc_internal *i = to_fc_internal(shost->transportt);
1482
1483 if (i->f->get_host_speed)
1484 i->f->get_host_speed(shost);
1485
1486 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1487 return snprintf(buf, 20, "unknown\n");
1488
1489 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1490}
ee959b00 1491static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1da177e4
LT		 1492 show_fc_host_speed, NULL);
1493
1494
1495fc_host_rd_attr(port_id, "0x%06x\n", 20);
1496fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1497fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1498fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
016131b8 1499fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1da177e4 1500
b8d08210
JS		 1501fc_private_host_show_function(system_hostname, "%s\n",
1502 FC_SYMBOLIC_NAME_SIZE + 1, )
1503fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
ee959b00 1504static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
b8d08210
JS		 1505 show_fc_host_system_hostname, store_fc_host_system_hostname);
1506
1da177e4
LT		 1507
1508/* Private Host Attributes */
1509
1510static ssize_t
ee959b00
TJ		 1511show_fc_private_host_tgtid_bind_type(struct device *dev,
1512 struct device_attribute *attr, char *buf)
1da177e4 1513{
ee959b00 1514 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1515 const char *name;
1516
1517 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1518 if (!name)
1519 return -EINVAL;
1520 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1521}
1522
d16794f6
JSEC		 1523#define get_list_head_entry(pos, head, member) \
1524 pos = list_entry((head)->next, typeof(*pos), member)
1525
1da177e4 1526static ssize_t
ee959b00
TJ		 1527store_fc_private_host_tgtid_bind_type(struct device *dev,
1528 struct device_attribute *attr, const char *buf, size_t count)
1da177e4 1529{
ee959b00 1530 struct Scsi_Host *shost = transport_class_to_shost(dev);
d16794f6 1531 struct fc_rport *rport;
1da177e4
LT		 1532 enum fc_tgtid_binding_type val;
1533 unsigned long flags;
1534
1535 if (get_fc_tgtid_bind_type_match(buf, &val))
1536 return -EINVAL;
1537
1538 /* if changing bind type, purge all unused consistent bindings */
1539 if (val != fc_host_tgtid_bind_type(shost)) {
1540 spin_lock_irqsave(shost->host_lock, flags);
d16794f6
JSEC		 1541 while (!list_empty(&fc_host_rport_bindings(shost))) {
1542 get_list_head_entry(rport,
1543 &fc_host_rport_bindings(shost), peers);
aedf3497
JS		 1544 list_del(&rport->peers);
1545 rport->port_state = FC_PORTSTATE_DELETED;
1546 fc_queue_work(shost, &rport->rport_delete_work);
d16794f6 1547 }
1da177e4
LT		 1548 spin_unlock_irqrestore(shost->host_lock, flags);
1549 }
1550
1551 fc_host_tgtid_bind_type(shost) = val;
1552 return count;
1553}
1554
ee959b00 1555static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1da177e4
LT		 1556 show_fc_private_host_tgtid_bind_type,
1557 store_fc_private_host_tgtid_bind_type);
1558
91ca7b01 1559static ssize_t
ee959b00
TJ		 1560store_fc_private_host_issue_lip(struct device *dev,
1561 struct device_attribute *attr, const char *buf, size_t count)
91ca7b01 1562{
ee959b00 1563 struct Scsi_Host *shost = transport_class_to_shost(dev);
91ca7b01
AV		 1564 struct fc_internal *i = to_fc_internal(shost->transportt);
1565 int ret;
1566
1567 /* ignore any data value written to the attribute */
1568 if (i->f->issue_fc_host_lip) {
1569 ret = i->f->issue_fc_host_lip(shost);
1570 return ret ? ret: count;
1571 }
1572
1573 return -ENOENT;
1574}
1575
ee959b00 1576static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
91ca7b01
AV		 1577 store_fc_private_host_issue_lip);
1578
a53eb5e0
JS		 1579fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1580
1581
1da177e4
LT		 1582/*
1583 * Host Statistics Management
1584 */
1585
1586/* Show a given an attribute in the statistics group */
1587static ssize_t
ee959b00 1588fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1da177e4 1589{
ee959b00 1590 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1591 struct fc_internal *i = to_fc_internal(shost->transportt);
1592 struct fc_host_statistics *stats;
1593 ssize_t ret = -ENOENT;
1594
1595 if (offset > sizeof(struct fc_host_statistics) ||
1596 offset % sizeof(u64) != 0)
1597 WARN_ON(1);
1598
1599 if (i->f->get_fc_host_stats) {
1600 stats = (i->f->get_fc_host_stats)(shost);
1601 if (stats)
1602 ret = snprintf(buf, 20, "0x%llx\n",
1603 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1604 }
1605 return ret;
1606}
1607
1608
1609/* generate a read-only statistics attribute */
1610#define fc_host_statistic(name) \
ee959b00
TJ		 1611static ssize_t show_fcstat_##name(struct device *cd, \
1612 struct device_attribute *attr, \
1613 char *buf) \
1da177e4
LT		 1614{ \
1615 return fc_stat_show(cd, buf, \
1616 offsetof(struct fc_host_statistics, name)); \
1617} \
ee959b00 1618static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1da177e4
LT		 1619
1620fc_host_statistic(seconds_since_last_reset);
1621fc_host_statistic(tx_frames);
1622fc_host_statistic(tx_words);
1623fc_host_statistic(rx_frames);
1624fc_host_statistic(rx_words);
1625fc_host_statistic(lip_count);
1626fc_host_statistic(nos_count);
1627fc_host_statistic(error_frames);
1628fc_host_statistic(dumped_frames);
1629fc_host_statistic(link_failure_count);
1630fc_host_statistic(loss_of_sync_count);
1631fc_host_statistic(loss_of_signal_count);
1632fc_host_statistic(prim_seq_protocol_err_count);
1633fc_host_statistic(invalid_tx_word_count);
1634fc_host_statistic(invalid_crc_count);
1635fc_host_statistic(fcp_input_requests);
1636fc_host_statistic(fcp_output_requests);
1637fc_host_statistic(fcp_control_requests);
1638fc_host_statistic(fcp_input_megabytes);
1639fc_host_statistic(fcp_output_megabytes);
1640
1641static ssize_t
ee959b00
TJ		 1642fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1643 const char *buf, size_t count)
1da177e4 1644{
ee959b00 1645 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1646 struct fc_internal *i = to_fc_internal(shost->transportt);
1647
1648 /* ignore any data value written to the attribute */
1649 if (i->f->reset_fc_host_stats) {
1650 i->f->reset_fc_host_stats(shost);
1651 return count;
1652 }
1653
1654 return -ENOENT;
1655}
ee959b00 1656static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1da177e4
LT		 1657 fc_reset_statistics);
1658
1da177e4 1659static struct attribute *fc_statistics_attrs[] = {
ee959b00
TJ		 1660 &device_attr_host_seconds_since_last_reset.attr,
1661 &device_attr_host_tx_frames.attr,
1662 &device_attr_host_tx_words.attr,
1663 &device_attr_host_rx_frames.attr,
1664 &device_attr_host_rx_words.attr,
1665 &device_attr_host_lip_count.attr,
1666 &device_attr_host_nos_count.attr,
1667 &device_attr_host_error_frames.attr,
1668 &device_attr_host_dumped_frames.attr,
1669 &device_attr_host_link_failure_count.attr,
1670 &device_attr_host_loss_of_sync_count.attr,
1671 &device_attr_host_loss_of_signal_count.attr,
1672 &device_attr_host_prim_seq_protocol_err_count.attr,
1673 &device_attr_host_invalid_tx_word_count.attr,
1674 &device_attr_host_invalid_crc_count.attr,
1675 &device_attr_host_fcp_input_requests.attr,
1676 &device_attr_host_fcp_output_requests.attr,
1677 &device_attr_host_fcp_control_requests.attr,
1678 &device_attr_host_fcp_input_megabytes.attr,
1679 &device_attr_host_fcp_output_megabytes.attr,
1680 &device_attr_host_reset_statistics.attr,
1da177e4
LT		 1681 NULL
1682};
1683
1684static struct attribute_group fc_statistics_group = {
1685 .name = "statistics",
1686 .attrs = fc_statistics_attrs,
1687};
1688
a53eb5e0
JS		 1689
1690/* Host Vport Attributes */
1691
1692static int
1693fc_parse_wwn(const char *ns, u64 *nm)
1694{
1695 unsigned int i, j;
1696 u8 wwn[8];
1697
1698 memset(wwn, 0, sizeof(wwn));
1699
1700 /* Validate and store the new name */
1701 for (i=0, j=0; i < 16; i++) {
1702 if ((*ns >= 'a') && (*ns <= 'f'))
1703 j = ((j << 4) | ((*ns++ -'a') + 10));
1704 else if ((*ns >= 'A') && (*ns <= 'F'))
1705 j = ((j << 4) | ((*ns++ -'A') + 10));
1706 else if ((*ns >= '0') && (*ns <= '9'))
1707 j = ((j << 4) | (*ns++ -'0'));
1708 else
1709 return -EINVAL;
1710 if (i % 2) {
1711 wwn[i/2] = j & 0xff;
1712 j = 0;
1713 }
1714 }
1715
1716 *nm = wwn_to_u64(wwn);
1717
1718 return 0;
1719}
1720
1721
1722/*
1723 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1724 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1725 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1726 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1727 */
1728static ssize_t
ee959b00
TJ		 1729store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1730 const char *buf, size_t count)
a53eb5e0 1731{
ee959b00 1732 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1733 struct fc_vport_identifiers vid;
1734 struct fc_vport *vport;
1735 unsigned int cnt=count;
1736 int stat;
1737
1738 memset(&vid, 0, sizeof(vid));
1739
1740 /* count may include a LF at end of string */
1741 if (buf[cnt-1] == '\n')
1742 cnt--;
1743
1744 /* validate we have enough characters for WWPN */
1745 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1746 return -EINVAL;
1747
1748 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1749 if (stat)
1750 return stat;
1751
1752 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1753 if (stat)
1754 return stat;
1755
1756 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1757 vid.vport_type = FC_PORTTYPE_NPIV;
1758 /* vid.symbolic_name is already zero/NULL's */
1759 vid.disable = false; /* always enabled */
1760
1761 /* we only allow support on Channel 0 !!! */
1762 stat = fc_vport_create(shost, 0, &shost->shost_gendev, &vid, &vport);
1763 return stat ? stat : count;
1764}
ee959b00 1765static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
a53eb5e0
JS		 1766 store_fc_host_vport_create);
1767
1768
1769/*
1770 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1771 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1772 * The WWNs are specified as hex characters, and may *not* contain
1773 * any prefixes (e.g. 0x, x, etc)
1774 */
1775static ssize_t
ee959b00
TJ		 1776store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1777 const char *buf, size_t count)
a53eb5e0 1778{
ee959b00 1779 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1780 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1781 struct fc_vport *vport;
1782 u64 wwpn, wwnn;
1783 unsigned long flags;
1784 unsigned int cnt=count;
1785 int stat, match;
1786
1787 /* count may include a LF at end of string */
1788 if (buf[cnt-1] == '\n')
1789 cnt--;
1790
1791 /* validate we have enough characters for WWPN */
1792 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1793 return -EINVAL;
1794
1795 stat = fc_parse_wwn(&buf[0], &wwpn);
1796 if (stat)
1797 return stat;
1798
1799 stat = fc_parse_wwn(&buf[17], &wwnn);
1800 if (stat)
1801 return stat;
1802
1803 spin_lock_irqsave(shost->host_lock, flags);
1804 match = 0;
1805 /* we only allow support on Channel 0 !!! */
1806 list_for_each_entry(vport, &fc_host->vports, peers) {
1807 if ((vport->channel == 0) &&
1808 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1809 match = 1;
1810 break;
1811 }
1812 }
1813 spin_unlock_irqrestore(shost->host_lock, flags);
1814
1815 if (!match)
1816 return -ENODEV;
1817
1818 stat = fc_vport_terminate(vport);
1819 return stat ? stat : count;
1820}
ee959b00 1821static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
a53eb5e0
JS		 1822 store_fc_host_vport_delete);
1823
1824
1da177e4
LT		 1825static int fc_host_match(struct attribute_container *cont,
1826 struct device *dev)
1827{
1828 struct Scsi_Host *shost;
1829 struct fc_internal *i;
1830
1831 if (!scsi_is_host_device(dev))
1832 return 0;
1833
1834 shost = dev_to_shost(dev);
1835 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1836 != &fc_host_class.class)
1837 return 0;
1838
1839 i = to_fc_internal(shost->transportt);
1840
1841 return &i->t.host_attrs.ac == cont;
1842}
1843
1844static int fc_target_match(struct attribute_container *cont,
1845 struct device *dev)
1846{
1847 struct Scsi_Host *shost;
1848 struct fc_internal *i;
1849
1850 if (!scsi_is_target_device(dev))
1851 return 0;
1852
1853 shost = dev_to_shost(dev->parent);
1854 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1855 != &fc_host_class.class)
1856 return 0;
1857
1858 i = to_fc_internal(shost->transportt);
1859
1860 return &i->t.target_attrs.ac == cont;
1861}
1862
1863static void fc_rport_dev_release(struct device *dev)
1864{
1865 struct fc_rport *rport = dev_to_rport(dev);
1866 put_device(dev->parent);
1867 kfree(rport);
1868}
1869
1870int scsi_is_fc_rport(const struct device *dev)
1871{
1872 return dev->release == fc_rport_dev_release;
1873}
1874EXPORT_SYMBOL(scsi_is_fc_rport);
1875
1876static int fc_rport_match(struct attribute_container *cont,
1877 struct device *dev)
1878{
1879 struct Scsi_Host *shost;
1880 struct fc_internal *i;
1881
1882 if (!scsi_is_fc_rport(dev))
1883 return 0;
1884
1885 shost = dev_to_shost(dev->parent);
1886 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1887 != &fc_host_class.class)
1888 return 0;
1889
1890 i = to_fc_internal(shost->transportt);
1891
1892 return &i->rport_attr_cont.ac == cont;
1893}
1894
5c44cd2a 1895
a53eb5e0
JS		 1896static void fc_vport_dev_release(struct device *dev)
1897{
1898 struct fc_vport *vport = dev_to_vport(dev);
1899 put_device(dev->parent); /* release kobj parent */
1900 kfree(vport);
1901}
1902
1903int scsi_is_fc_vport(const struct device *dev)
1904{
1905 return dev->release == fc_vport_dev_release;
1906}
1907EXPORT_SYMBOL(scsi_is_fc_vport);
1908
1909static int fc_vport_match(struct attribute_container *cont,
1910 struct device *dev)
1911{
1912 struct fc_vport *vport;
1913 struct Scsi_Host *shost;
1914 struct fc_internal *i;
1915
1916 if (!scsi_is_fc_vport(dev))
1917 return 0;
1918 vport = dev_to_vport(dev);
1919
1920 shost = vport_to_shost(vport);
1921 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1922 != &fc_host_class.class)
1923 return 0;
1924
1925 i = to_fc_internal(shost->transportt);
1926 return &i->vport_attr_cont.ac == cont;
1927}
1928
1929
c829c394
JS		 1930/**
1931 * fc_timed_out - FC Transport I/O timeout intercept handler
c829c394
JS		 1932 * @scmd: The SCSI command which timed out
1933 *
1934 * This routine protects against error handlers getting invoked while a
1935 * rport is in a blocked state, typically due to a temporarily loss of
1936 * connectivity. If the error handlers are allowed to proceed, requests
1937 * to abort i/o, reset the target, etc will likely fail as there is no way
1938 * to communicate with the device to perform the requested function. These
1939 * failures may result in the midlayer taking the device offline, requiring
1940 * manual intervention to restore operation.
1941 *
1942 * This routine, called whenever an i/o times out, validates the state of
1943 * the underlying rport. If the rport is blocked, it returns
1944 * EH_RESET_TIMER, which will continue to reschedule the timeout.
1945 * Eventually, either the device will return, or devloss_tmo will fire,
1946 * and when the timeout then fires, it will be handled normally.
1947 * If the rport is not blocked, normal error handling continues.
1948 *
1949 * Notes:
1950 * This routine assumes no locks are held on entry.
eb44820c 1951 */
c829c394
JS		 1952static enum scsi_eh_timer_return
1953fc_timed_out(struct scsi_cmnd *scmd)
1954{
1955 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
1956
1957 if (rport->port_state == FC_PORTSTATE_BLOCKED)
1958 return EH_RESET_TIMER;
1959
1960 return EH_NOT_HANDLED;
1961}
1962
5c44cd2a
JSEC		 1963/*
1964 * Must be called with shost->host_lock held
1965 */
e02f3f59
CH		 1966static int fc_user_scan(struct Scsi_Host *shost, uint channel,
1967 uint id, uint lun)
5c44cd2a
JSEC		 1968{
1969 struct fc_rport *rport;
1970
e02f3f59
CH		 1971 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1972 if (rport->scsi_target_id == -1)
1973 continue;
5c44cd2a 1974
0d2fcd9f
HR		 1975 if (rport->port_state != FC_PORTSTATE_ONLINE)
1976 continue;
1977
e02f3f59
CH		 1978 if ((channel == SCAN_WILD_CARD || channel == rport->channel) &&
1979 (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) {
1980 scsi_scan_target(&rport->dev, rport->channel,
1981 rport->scsi_target_id, lun, 1);
1982 }
1983 }
1984
1985 return 0;
5c44cd2a
JSEC		 1986}
1987
7525236d
FT		 1988static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
1989 int result)
1990{
1991 struct fc_internal *i = to_fc_internal(shost->transportt);
1992 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
1993}
1994
1995static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
1996{
1997 struct fc_internal *i = to_fc_internal(shost->transportt);
1998 return i->f->it_nexus_response(shost, nexus, result);
1999}
2000
1da177e4
LT		 2001struct scsi_transport_template *
2002fc_attach_transport(struct fc_function_template *ft)
2003{
1da177e4 2004 int count;
24669f75
JS		 2005 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2006 GFP_KERNEL);
1da177e4
LT		 2007
2008 if (unlikely(!i))
2009 return NULL;
2010
1da177e4
LT		 2011 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2012 i->t.target_attrs.ac.class = &fc_transport_class.class;
2013 i->t.target_attrs.ac.match = fc_target_match;
2014 i->t.target_size = sizeof(struct fc_starget_attrs);
2015 transport_container_register(&i->t.target_attrs);
2016
2017 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2018 i->t.host_attrs.ac.class = &fc_host_class.class;
2019 i->t.host_attrs.ac.match = fc_host_match;
2020 i->t.host_size = sizeof(struct fc_host_attrs);
2021 if (ft->get_fc_host_stats)
2022 i->t.host_attrs.statistics = &fc_statistics_group;
2023 transport_container_register(&i->t.host_attrs);
2024
2025 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2026 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2027 i->rport_attr_cont.ac.match = fc_rport_match;
2028 transport_container_register(&i->rport_attr_cont);
2029
a53eb5e0
JS		 2030 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2031 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2032 i->vport_attr_cont.ac.match = fc_vport_match;
2033 transport_container_register(&i->vport_attr_cont);
2034
1da177e4
LT		 2035 i->f = ft;
2036
2037 /* Transport uses the shost workq for scsi scanning */
2038 i->t.create_work_queue = 1;
5c44cd2a 2039
c829c394
JS		 2040 i->t.eh_timed_out = fc_timed_out;
2041
e02f3f59 2042 i->t.user_scan = fc_user_scan;
9ef3e4a4 2043
7525236d
FT		 2044 /* target-mode drivers' functions */
2045 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2046 i->t.it_nexus_response = fc_it_nexus_response;
2047
1da177e4
LT		 2048 /*
2049 * Setup SCSI Target Attributes.
2050 */
2051 count = 0;
2052 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2053 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2054 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2055
2056 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2057
2058 i->starget_attrs[count] = NULL;
2059
2060
2061 /*
2062 * Setup SCSI Host Attributes.
2063 */
2064 count=0;
2065 SETUP_HOST_ATTRIBUTE_RD(node_name);
2066 SETUP_HOST_ATTRIBUTE_RD(port_name);
6b7281d0 2067 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1da177e4
LT		 2068 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2069 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1da177e4
LT		 2070 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2071 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
a53eb5e0
JS		 2072 if (ft->vport_create) {
2073 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2074 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2075 }
1da177e4
LT		 2076 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2077
2078 SETUP_HOST_ATTRIBUTE_RD(port_id);
2079 SETUP_HOST_ATTRIBUTE_RD(port_type);
2080 SETUP_HOST_ATTRIBUTE_RD(port_state);
2081 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2082 SETUP_HOST_ATTRIBUTE_RD(speed);
2083 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
016131b8 2084 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
b8d08210 2085 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
1da177e4
LT		 2086
2087 /* Transport-managed attributes */
2088 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
91ca7b01
AV		 2089 if (ft->issue_fc_host_lip)
2090 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
a53eb5e0
JS		 2091 if (ft->vport_create)
2092 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2093 if (ft->vport_delete)
2094 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
1da177e4
LT		 2095
2096 BUG_ON(count > FC_HOST_NUM_ATTRS);
2097
2098 i->host_attrs[count] = NULL;
2099
2100 /*
2101 * Setup Remote Port Attributes.
2102 */
2103 count=0;
2104 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2105 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2106 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2107 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2108 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2109 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2110 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2111 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2112 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
0f29b966
JS		 2113 if (ft->terminate_rport_io)
2114 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
1da177e4
LT		 2115
2116 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2117
2118 i->rport_attrs[count] = NULL;
2119
a53eb5e0
JS		 2120 /*
2121 * Setup Virtual Port Attributes.
2122 */
2123 count=0;
2124 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2125 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2126 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2127 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2128 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2129 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2130 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2131 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2132 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2133
2134 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2135
2136 i->vport_attrs[count] = NULL;
2137
1da177e4
LT		 2138 return &i->t;
2139}
2140EXPORT_SYMBOL(fc_attach_transport);
2141
2142void fc_release_transport(struct scsi_transport_template *t)
2143{
2144 struct fc_internal *i = to_fc_internal(t);
2145
2146 transport_container_unregister(&i->t.target_attrs);
2147 transport_container_unregister(&i->t.host_attrs);
2148 transport_container_unregister(&i->rport_attr_cont);
a53eb5e0 2149 transport_container_unregister(&i->vport_attr_cont);
1da177e4
LT		 2150
2151 kfree(i);
2152}
2153EXPORT_SYMBOL(fc_release_transport);
2154
aedf3497
JS		 2155/**
2156 * fc_queue_work - Queue work to the fc_host workqueue.
2157 * @shost: Pointer to Scsi_Host bound to fc_host.
2158 * @work: Work to queue for execution.
2159 *
2160 * Return value:
a0785edf
JS		 2161 * 1 - work queued for execution
2162 * 0 - work is already queued
2163 * -EINVAL - work queue doesn't exist
eb44820c 2164 */
aedf3497
JS		 2165static int
2166fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2167{
2168 if (unlikely(!fc_host_work_q(shost))) {
2169 printk(KERN_ERR
2170 "ERROR: FC host '%s' attempted to queue work, "
2171 "when no workqueue created.\n", shost->hostt->name);
2172 dump_stack();
2173
2174 return -EINVAL;
2175 }
2176
2177 return queue_work(fc_host_work_q(shost), work);
2178}
2179
2180/**
2181 * fc_flush_work - Flush a fc_host's workqueue.
2182 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2183 */
aedf3497
JS		 2184static void
2185fc_flush_work(struct Scsi_Host *shost)
2186{
2187 if (!fc_host_work_q(shost)) {
2188 printk(KERN_ERR
2189 "ERROR: FC host '%s' attempted to flush work, "
2190 "when no workqueue created.\n", shost->hostt->name);
2191 dump_stack();
2192 return;
2193 }
2194
2195 flush_workqueue(fc_host_work_q(shost));
2196}
2197
2198/**
2199 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2200 * @shost: Pointer to Scsi_Host bound to fc_host.
2201 * @work: Work to queue for execution.
2202 * @delay: jiffies to delay the work queuing
2203 *
2204 * Return value:
0f29b966 2205 * 1 on success / 0 already queued / < 0 for error
eb44820c 2206 */
aedf3497 2207static int
c4028958 2208fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
aedf3497
JS		 2209 unsigned long delay)
2210{
2211 if (unlikely(!fc_host_devloss_work_q(shost))) {
2212 printk(KERN_ERR
2213 "ERROR: FC host '%s' attempted to queue work, "
2214 "when no workqueue created.\n", shost->hostt->name);
2215 dump_stack();
2216
2217 return -EINVAL;
2218 }
2219
2220 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2221}
2222
2223/**
2224 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2225 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2226 */
aedf3497
JS		 2227static void
2228fc_flush_devloss(struct Scsi_Host *shost)
2229{
2230 if (!fc_host_devloss_work_q(shost)) {
2231 printk(KERN_ERR
2232 "ERROR: FC host '%s' attempted to flush work, "
2233 "when no workqueue created.\n", shost->hostt->name);
2234 dump_stack();
2235 return;
2236 }
2237
2238 flush_workqueue(fc_host_devloss_work_q(shost));
2239}
2240
1da177e4
LT		 2241
2242/**
eb44820c
RL		 2243 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2244 * @shost: Which &Scsi_Host
1da177e4
LT		 2245 *
2246 * This routine is expected to be called immediately preceeding the
2247 * a driver's call to scsi_remove_host().
2248 *
2249 * WARNING: A driver utilizing the fc_transport, which fails to call
eb44820c 2250 * this routine prior to scsi_remove_host(), will leave dangling
1da177e4
LT		 2251 * objects in /sys/class/fc_remote_ports. Access to any of these
2252 * objects can result in a system crash !!!
2253 *
2254 * Notes:
2255 * This routine assumes no locks are held on entry.
eb44820c 2256 */
1da177e4
LT		 2257void
2258fc_remove_host(struct Scsi_Host *shost)
2259{
a53eb5e0
JS		 2260 struct fc_vport *vport = NULL, *next_vport = NULL;
2261 struct fc_rport *rport = NULL, *next_rport = NULL;
aedf3497
JS		 2262 struct workqueue_struct *work_q;
2263 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
a53eb5e0 2264 unsigned long flags;
a53eb5e0
JS		 2265
2266 spin_lock_irqsave(shost->host_lock, flags);
2267
2268 /* Remove any vports */
9ef3e4a4
JS		 2269 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2270 fc_queue_work(shost, &vport->vport_delete_work);
1da177e4
LT		 2271
2272 /* Remove any remote ports */
2273 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2274 &fc_host->rports, peers) {
2275 list_del(&rport->peers);
2276 rport->port_state = FC_PORTSTATE_DELETED;
2277 fc_queue_work(shost, &rport->rport_delete_work);
2278 }
2279
1da177e4 2280 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2281 &fc_host->rport_bindings, peers) {
2282 list_del(&rport->peers);
2283 rport->port_state = FC_PORTSTATE_DELETED;
2284 fc_queue_work(shost, &rport->rport_delete_work);
2285 }
2286
a53eb5e0
JS		 2287 spin_unlock_irqrestore(shost->host_lock, flags);
2288
aedf3497
JS		 2289 /* flush all scan work items */
2290 scsi_flush_work(shost);
2291
2292 /* flush all stgt delete, and rport delete work items, then kill it */
2293 if (fc_host->work_q) {
2294 work_q = fc_host->work_q;
2295 fc_host->work_q = NULL;
2296 destroy_workqueue(work_q);
2297 }
2298
2299 /* flush all devloss work items, then kill it */
2300 if (fc_host->devloss_work_q) {
2301 work_q = fc_host->devloss_work_q;
2302 fc_host->devloss_work_q = NULL;
2303 destroy_workqueue(work_q);
2304 }
1da177e4
LT		 2305}
2306EXPORT_SYMBOL(fc_remove_host);
2307
aedf3497
JS		 2308
2309/**
2310 * fc_starget_delete - called to delete the scsi decendents of an rport
c4028958 2311 * @work: remote port to be operated on.
eb44820c
RL		 2312 *
2313 * Deletes target and all sdevs.
2314 */
19a7b4ae 2315static void
c4028958 2316fc_starget_delete(struct work_struct *work)
19a7b4ae 2317{
c4028958
DH		 2318 struct fc_rport *rport =
2319 container_of(work, struct fc_rport, stgt_delete_work);
19a7b4ae 2320 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966
JS		 2321 struct fc_internal *i = to_fc_internal(shost->transportt);
2322
92740b24
JS		 2323 /* Involve the LLDD if possible to terminate all io on the rport. */
2324 if (i->f->terminate_rport_io)
0f29b966 2325 i->f->terminate_rport_io(rport);
19a7b4ae 2326
19a7b4ae
JSEC		 2327 scsi_remove_target(&rport->dev);
2328}
2329
aedf3497
JS		 2330
2331/**
2332 * fc_rport_final_delete - finish rport termination and delete it.
c4028958 2333 * @work: remote port to be deleted.
eb44820c 2334 */
aedf3497 2335static void
c4028958 2336fc_rport_final_delete(struct work_struct *work)
aedf3497 2337{
c4028958
DH		 2338 struct fc_rport *rport =
2339 container_of(work, struct fc_rport, rport_delete_work);
aedf3497
JS		 2340 struct device *dev = &rport->dev;
2341 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2342 struct fc_internal *i = to_fc_internal(shost->transportt);
92740b24 2343 unsigned long flags;
aedf3497
JS		 2344
2345 /*
9ef3e4a4 2346 * if a scan is pending, flush the SCSI Host work_q so that
aedf3497
JS		 2347 * that we can reclaim the rport scan work element.
2348 */
2349 if (rport->flags & FC_RPORT_SCAN_PENDING)
2350 scsi_flush_work(shost);
2351
92740b24
JS		 2352 /* involve the LLDD to terminate all pending i/o */
2353 if (i->f->terminate_rport_io)
2354 i->f->terminate_rport_io(rport);
2355
2356 /*
2357 * Cancel any outstanding timers. These should really exist
2358 * only when rmmod'ing the LLDD and we're asking for
2359 * immediate termination of the rports
2360 */
2361 spin_lock_irqsave(shost->host_lock, flags);
2362 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2363 spin_unlock_irqrestore(shost->host_lock, flags);
2364 if (!cancel_delayed_work(&rport->fail_io_work))
2365 fc_flush_devloss(shost);
2366 if (!cancel_delayed_work(&rport->dev_loss_work))
2367 fc_flush_devloss(shost);
2368 spin_lock_irqsave(shost->host_lock, flags);
2369 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2370 }
2371 spin_unlock_irqrestore(shost->host_lock, flags);
2372
0f29b966
JS		 2373 /* Delete SCSI target and sdevs */
2374 if (rport->scsi_target_id != -1)
c4028958 2375 fc_starget_delete(&rport->stgt_delete_work);
92740b24
JS		 2376
2377 /*
2378 * Notify the driver that the rport is now dead. The LLDD will
2379 * also guarantee that any communication to the rport is terminated
2380 */
2381 if (i->f->dev_loss_tmo_callbk)
0f29b966 2382 i->f->dev_loss_tmo_callbk(rport);
0f29b966 2383
aedf3497
JS		 2384 transport_remove_device(dev);
2385 device_del(dev);
2386 transport_destroy_device(dev);
3bdad7bd
JS		 2387 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2388 put_device(dev); /* for self-reference */
aedf3497
JS		 2389}
2390
2391
1da177e4
LT		 2392/**
2393 * fc_rport_create - allocates and creates a remote FC port.
2394 * @shost: scsi host the remote port is connected to.
2395 * @channel: Channel on shost port connected to.
2396 * @ids: The world wide names, fc address, and FC4 port
2397 * roles for the remote port.
2398 *
2399 * Allocates and creates the remoter port structure, including the
2400 * class and sysfs creation.
2401 *
2402 * Notes:
2403 * This routine assumes no locks are held on entry.
eb44820c 2404 */
44818efb 2405static struct fc_rport *
1da177e4
LT		 2406fc_rport_create(struct Scsi_Host *shost, int channel,
2407 struct fc_rport_identifiers *ids)
2408{
aedf3497 2409 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2410 struct fc_internal *fci = to_fc_internal(shost->transportt);
2411 struct fc_rport *rport;
2412 struct device *dev;
2413 unsigned long flags;
2414 int error;
2415 size_t size;
2416
2417 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
24669f75 2418 rport = kzalloc(size, GFP_KERNEL);
1da177e4
LT		 2419 if (unlikely(!rport)) {
2420 printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
2421 return NULL;
2422 }
1da177e4
LT		 2423
2424 rport->maxframe_size = -1;
2425 rport->supported_classes = FC_COS_UNSPECIFIED;
2426 rport->dev_loss_tmo = fc_dev_loss_tmo;
2427 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2428 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2429 rport->port_id = ids->port_id;
2430 rport->roles = ids->roles;
2431 rport->port_state = FC_PORTSTATE_ONLINE;
2432 if (fci->f->dd_fcrport_size)
2433 rport->dd_data = &rport[1];
2434 rport->channel = channel;
0f29b966 2435 rport->fast_io_fail_tmo = -1;
1da177e4 2436
c4028958
DH		 2437 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2438 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2439 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2440 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2441 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
1da177e4
LT		 2442
2443 spin_lock_irqsave(shost->host_lock, flags);
2444
2445 rport->number = fc_host->next_rport_number++;
a53eb5e0 2446 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
1da177e4
LT		 2447 rport->scsi_target_id = fc_host->next_target_id++;
2448 else
2449 rport->scsi_target_id = -1;
aedf3497 2450 list_add_tail(&rport->peers, &fc_host->rports);
3bdad7bd 2451 get_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 2452
2453 spin_unlock_irqrestore(shost->host_lock, flags);
2454
2455 dev = &rport->dev;
3bdad7bd
JS		 2456 device_initialize(dev); /* takes self reference */
2457 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
1da177e4
LT		 2458 dev->release = fc_rport_dev_release;
2459 sprintf(dev->bus_id, "rport-%d:%d-%d",
2460 shost->host_no, channel, rport->number);
2461 transport_setup_device(dev);
2462
2463 error = device_add(dev);
2464 if (error) {
2465 printk(KERN_ERR "FC Remote Port device_add failed\n");
2466 goto delete_rport;
2467 }
2468 transport_add_device(dev);
2469 transport_configure_device(dev);
2470
a53eb5e0 2471 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
1da177e4 2472 /* initiate a scan of the target */
aedf3497 2473 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2474 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2475 }
1da177e4
LT		 2476
2477 return rport;
2478
2479delete_rport:
2480 transport_destroy_device(dev);
1da177e4
LT		 2481 spin_lock_irqsave(shost->host_lock, flags);
2482 list_del(&rport->peers);
3bdad7bd 2483 put_device(&shost->shost_gendev); /* for fc_host->rport list */
1da177e4
LT		 2484 spin_unlock_irqrestore(shost->host_lock, flags);
2485 put_device(dev->parent);
2486 kfree(rport);
2487 return NULL;
2488}
2489
2490/**
eb44820c 2491 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
1da177e4
LT		 2492 * @shost: scsi host the remote port is connected to.
2493 * @channel: Channel on shost port connected to.
2494 * @ids: The world wide names, fc address, and FC4 port
2495 * roles for the remote port.
2496 *
2497 * The LLDD calls this routine to notify the transport of the existence
2498 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2499 * of the port, it's FC address (port_id), and the FC4 roles that are
2500 * active for the port.
2501 *
2502 * For ports that are FCP targets (aka scsi targets), the FC transport
2503 * maintains consistent target id bindings on behalf of the LLDD.
2504 * A consistent target id binding is an assignment of a target id to
2505 * a remote port identifier, which persists while the scsi host is
2506 * attached. The remote port can disappear, then later reappear, and
2507 * it's target id assignment remains the same. This allows for shifts
2508 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2509 * changes to the scsi subsystem which is based on scsi host number and
2510 * target id values. Bindings are only valid during the attachment of
2511 * the scsi host. If the host detaches, then later re-attaches, target
2512 * id bindings may change.
2513 *
2514 * This routine is responsible for returning a remote port structure.
2515 * The routine will search the list of remote ports it maintains
2516 * internally on behalf of consistent target id mappings. If found, the
2517 * remote port structure will be reused. Otherwise, a new remote port
2518 * structure will be allocated.
2519 *
2520 * Whenever a remote port is allocated, a new fc_remote_port class
2521 * device is created.
2522 *
2523 * Should not be called from interrupt context.
2524 *
2525 * Notes:
2526 * This routine assumes no locks are held on entry.
eb44820c 2527 */
1da177e4
LT		 2528struct fc_rport *
2529fc_remote_port_add(struct Scsi_Host *shost, int channel,
2530 struct fc_rport_identifiers *ids)
2531{
19a7b4ae 2532 struct fc_internal *fci = to_fc_internal(shost->transportt);
aedf3497 2533 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2534 struct fc_rport *rport;
2535 unsigned long flags;
2536 int match = 0;
2537
aedf3497
JS		 2538 /* ensure any stgt delete functions are done */
2539 fc_flush_work(shost);
2540
19a7b4ae
JSEC		 2541 /*
2542 * Search the list of "active" rports, for an rport that has been
2543 * deleted, but we've held off the real delete while the target
2544 * is in a "blocked" state.
2545 */
2546 spin_lock_irqsave(shost->host_lock, flags);
2547
aedf3497 2548 list_for_each_entry(rport, &fc_host->rports, peers) {
19a7b4ae
JSEC		 2549
2550 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2551 (rport->channel == channel)) {
2552
aedf3497 2553 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 2554 case FC_TGTID_BIND_BY_WWPN:
2555 case FC_TGTID_BIND_NONE:
2556 if (rport->port_name == ids->port_name)
2557 match = 1;
2558 break;
2559 case FC_TGTID_BIND_BY_WWNN:
2560 if (rport->node_name == ids->node_name)
2561 match = 1;
2562 break;
2563 case FC_TGTID_BIND_BY_ID:
2564 if (rport->port_id == ids->port_id)
2565 match = 1;
2566 break;
2567 }
2568
2569 if (match) {
19a7b4ae
JSEC		 2570
2571 memcpy(&rport->node_name, &ids->node_name,
2572 sizeof(rport->node_name));
2573 memcpy(&rport->port_name, &ids->port_name,
2574 sizeof(rport->port_name));
2575 rport->port_id = ids->port_id;
2576
2577 rport->port_state = FC_PORTSTATE_ONLINE;
2578 rport->roles = ids->roles;
2579
2580 spin_unlock_irqrestore(shost->host_lock, flags);
2581
2582 if (fci->f->dd_fcrport_size)
2583 memset(rport->dd_data, 0,
2584 fci->f->dd_fcrport_size);
2585
2586 /*
92740b24
JS		 2587 * If we were not a target, cancel the
2588 * io terminate and rport timers, and
2589 * we're done.
2590 *
2591 * If we were a target, but our new role
2592 * doesn't indicate a target, leave the
2593 * timers running expecting the role to
2594 * change as the target fully logs in. If
2595 * it doesn't, the target will be torn down.
2596 *
2597 * If we were a target, and our role shows
2598 * we're still a target, cancel the timers
2599 * and kick off a scan.
19a7b4ae 2600 */
19a7b4ae 2601
92740b24
JS		 2602 /* was a target, not in roles */
2603 if ((rport->scsi_target_id != -1) &&
a53eb5e0 2604 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
92740b24 2605 return rport;
19a7b4ae
JSEC		 2606
2607 /*
92740b24
JS		 2608 * Stop the fail io and dev_loss timers.
2609 * If they flush, the port_state will
2610 * be checked and will NOOP the function.
19a7b4ae 2611 */
0f29b966
JS		 2612 if (!cancel_delayed_work(&rport->fail_io_work))
2613 fc_flush_devloss(shost);
92740b24 2614 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2615 fc_flush_devloss(shost);
2616
2617 spin_lock_irqsave(shost->host_lock, flags);
2618
2619 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
19a7b4ae 2620
92740b24
JS		 2621 /* if target, initiate a scan */
2622 if (rport->scsi_target_id != -1) {
2623 rport->flags |= FC_RPORT_SCAN_PENDING;
2624 scsi_queue_work(shost,
2625 &rport->scan_work);
2626 spin_unlock_irqrestore(shost->host_lock,
2627 flags);
2628 scsi_target_unblock(&rport->dev);
2629 } else
2630 spin_unlock_irqrestore(shost->host_lock,
2631 flags);
a0785edf 2632
19a7b4ae
JSEC		 2633 return rport;
2634 }
2635 }
2636 }
2637
92740b24
JS		 2638 /*
2639 * Search the bindings array
2640 * Note: if never a FCP target, you won't be on this list
2641 */
aedf3497 2642 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
1da177e4
LT		 2643
2644 /* search for a matching consistent binding */
2645
aedf3497 2646 list_for_each_entry(rport, &fc_host->rport_bindings,
1da177e4
LT		 2647 peers) {
2648 if (rport->channel != channel)
2649 continue;
2650
aedf3497 2651 switch (fc_host->tgtid_bind_type) {
1da177e4
LT		 2652 case FC_TGTID_BIND_BY_WWPN:
2653 if (rport->port_name == ids->port_name)
2654 match = 1;
2655 break;
2656 case FC_TGTID_BIND_BY_WWNN:
2657 if (rport->node_name == ids->node_name)
2658 match = 1;
2659 break;
2660 case FC_TGTID_BIND_BY_ID:
2661 if (rport->port_id == ids->port_id)
2662 match = 1;
2663 break;
2664 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2665 break;
2666 }
2667
2668 if (match) {
aedf3497 2669 list_move_tail(&rport->peers, &fc_host->rports);
1da177e4
LT		 2670 break;
2671 }
2672 }
2673
1da177e4
LT		 2674 if (match) {
2675 memcpy(&rport->node_name, &ids->node_name,
2676 sizeof(rport->node_name));
2677 memcpy(&rport->port_name, &ids->port_name,
2678 sizeof(rport->port_name));
2679 rport->port_id = ids->port_id;
2680 rport->roles = ids->roles;
2681 rport->port_state = FC_PORTSTATE_ONLINE;
2682
19a7b4ae
JSEC		 2683 if (fci->f->dd_fcrport_size)
2684 memset(rport->dd_data, 0,
2685 fci->f->dd_fcrport_size);
2686
a53eb5e0 2687 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
1da177e4 2688 /* initiate a scan of the target */
aedf3497 2689 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2690 scsi_queue_work(shost, &rport->scan_work);
a0785edf
JS		 2691 spin_unlock_irqrestore(shost->host_lock, flags);
2692 scsi_target_unblock(&rport->dev);
2693 } else
2694 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2695
2696 return rport;
2697 }
2698 }
2699
19a7b4ae
JSEC		 2700 spin_unlock_irqrestore(shost->host_lock, flags);
2701
1da177e4
LT		 2702 /* No consistent binding found - create new remote port entry */
2703 rport = fc_rport_create(shost, channel, ids);
2704
2705 return rport;
2706}
2707EXPORT_SYMBOL(fc_remote_port_add);
2708
1da177e4
LT		 2709
2710/**
eb44820c 2711 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
1da177e4
LT		 2712 * @rport: The remote port that no longer exists
2713 *
2714 * The LLDD calls this routine to notify the transport that a remote
2715 * port is no longer part of the topology. Note: Although a port
2716 * may no longer be part of the topology, it may persist in the remote
19a7b4ae 2717 * ports displayed by the fc_host. We do this under 2 conditions:
eb44820c 2718 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
19a7b4ae
JSEC		 2719 * This allows the port to temporarily disappear, then reappear without
2720 * disrupting the SCSI device tree attached to it. During the "blocked"
2721 * period the port will still exist.
eb44820c 2722 * 2) If the port was a scsi target and disappears for longer than we
19a7b4ae
JSEC		 2723 * expect, we'll delete the port and the tear down the SCSI device tree
2724 * attached to it. However, we want to semi-persist the target id assigned
2725 * to that port if it eventually does exist. The port structure will
2726 * remain (although with minimal information) so that the target id
2727 * bindings remails.
1da177e4
LT		 2728 *
2729 * If the remote port is not an FCP Target, it will be fully torn down
2730 * and deallocated, including the fc_remote_port class device.
2731 *
19a7b4ae
JSEC		 2732 * If the remote port is an FCP Target, the port will be placed in a
2733 * temporary blocked state. From the LLDD's perspective, the rport no
2734 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2735 * exists, but all sdevs on it are blocked from further I/O. The following
eb44820c
RL		 2736 * is then expected.
2737 *
19a7b4ae
JSEC		 2738 * If the remote port does not return (signaled by a LLDD call to
2739 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2740 * scsi target is removed - killing all outstanding i/o and removing the
2741 * scsi devices attached ot it. The port structure will be marked Not
2742 * Present and be partially cleared, leaving only enough information to
2743 * recognize the remote port relative to the scsi target id binding if
2744 * it later appears. The port will remain as long as there is a valid
2745 * binding (e.g. until the user changes the binding type or unloads the
2746 * scsi host with the binding).
1da177e4 2747 *
19a7b4ae
JSEC		 2748 * If the remote port returns within the dev_loss_tmo value (and matches
2749 * according to the target id binding type), the port structure will be
2750 * reused. If it is no longer a SCSI target, the target will be torn
2751 * down. If it continues to be a SCSI target, then the target will be
2752 * unblocked (allowing i/o to be resumed), and a scan will be activated
2753 * to ensure that all luns are detected.
2754 *
2755 * Called from normal process context only - cannot be called from interrupt.
1da177e4
LT		 2756 *
2757 * Notes:
2758 * This routine assumes no locks are held on entry.
eb44820c 2759 */
1da177e4
LT		 2760void
2761fc_remote_port_delete(struct fc_rport *rport)
2762{
aedf3497 2763 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2764 struct fc_internal *i = to_fc_internal(shost->transportt);
19a7b4ae 2765 int timeout = rport->dev_loss_tmo;
aedf3497
JS		 2766 unsigned long flags;
2767
2768 /*
2769 * No need to flush the fc_host work_q's, as all adds are synchronous.
2770 *
2771 * We do need to reclaim the rport scan work element, so eventually
2772 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2773 * there's still a scan pending.
2774 */
2775
2776 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2777
92740b24 2778 if (rport->port_state != FC_PORTSTATE_ONLINE) {
aedf3497 2779 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2780 return;
2781 }
2782
92740b24
JS		 2783 /*
2784 * In the past, we if this was not an FCP-Target, we would
2785 * unconditionally just jump to deleting the rport.
2786 * However, rports can be used as node containers by the LLDD,
2787 * and its not appropriate to just terminate the rport at the
2788 * first sign of a loss in connectivity. The LLDD may want to
2789 * send ELS traffic to re-validate the login. If the rport is
2790 * immediately deleted, it makes it inappropriate for a node
2791 * container.
2792 * So... we now unconditionally wait dev_loss_tmo before
2793 * destroying an rport.
2794 */
2795
aedf3497
JS		 2796 rport->port_state = FC_PORTSTATE_BLOCKED;
2797
2798 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2799
2800 spin_unlock_irqrestore(shost->host_lock, flags);
2801
7525236d
FT		 2802 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
2803 shost->active_mode & MODE_TARGET)
2804 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
2805
19a7b4ae 2806 scsi_target_block(&rport->dev);
1da177e4 2807
0f29b966
JS		 2808 /* see if we need to kill io faster than waiting for device loss */
2809 if ((rport->fast_io_fail_tmo != -1) &&
2810 (rport->fast_io_fail_tmo < timeout) && (i->f->terminate_rport_io))
2811 fc_queue_devloss_work(shost, &rport->fail_io_work,
2812 rport->fast_io_fail_tmo * HZ);
2813
19a7b4ae 2814 /* cap the length the devices can be blocked until they are deleted */
aedf3497 2815 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
1da177e4
LT		 2816}
2817EXPORT_SYMBOL(fc_remote_port_delete);
2818
2819/**
eb44820c 2820 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
1da177e4 2821 * @rport: The remote port that changed.
eb44820c 2822 * @roles: New roles for this port.
1da177e4 2823 *
eb44820c
RL		 2824 * Description: The LLDD calls this routine to notify the transport that the
2825 * roles on a remote port may have changed. The largest effect of this is
1da177e4
LT		 2826 * if a port now becomes a FCP Target, it must be allocated a
2827 * scsi target id. If the port is no longer a FCP target, any
2828 * scsi target id value assigned to it will persist in case the
2829 * role changes back to include FCP Target. No changes in the scsi
2830 * midlayer will be invoked if the role changes (in the expectation
2831 * that the role will be resumed. If it doesn't normal error processing
2832 * will take place).
2833 *
2834 * Should not be called from interrupt context.
2835 *
2836 * Notes:
2837 * This routine assumes no locks are held on entry.
eb44820c 2838 */
1da177e4
LT		 2839void
2840fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
2841{
2842 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 2843 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2844 unsigned long flags;
2845 int create = 0;
7525236d 2846 int ret;
1da177e4 2847
1da177e4 2848 spin_lock_irqsave(shost->host_lock, flags);
a53eb5e0 2849 if (roles & FC_PORT_ROLE_FCP_TARGET) {
19a7b4ae
JSEC		 2850 if (rport->scsi_target_id == -1) {
2851 rport->scsi_target_id = fc_host->next_target_id++;
2852 create = 1;
a53eb5e0 2853 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
19a7b4ae 2854 create = 1;
7525236d
FT		 2855 } else if (shost->active_mode & MODE_TARGET) {
2856 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
2857 (char *)&rport->node_name);
2858 if (ret)
2859 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
2860 ret);
1da177e4 2861 }
1da177e4 2862
19a7b4ae
JSEC		 2863 rport->roles = roles;
2864
aedf3497
JS		 2865 spin_unlock_irqrestore(shost->host_lock, flags);
2866
19a7b4ae
JSEC		 2867 if (create) {
2868 /*
2869 * There may have been a delete timer running on the
2870 * port. Ensure that it is cancelled as we now know
2871 * the port is an FCP Target.
2872 * Note: we know the rport is exists and in an online
2873 * state as the LLDD would not have had an rport
2874 * reference to pass us.
2875 *
2876 * Take no action on the del_timer failure as the state
2877 * machine state change will validate the
2878 * transaction.
2879 */
0f29b966
JS		 2880 if (!cancel_delayed_work(&rport->fail_io_work))
2881 fc_flush_devloss(shost);
19a7b4ae 2882 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2883 fc_flush_devloss(shost);
2884
2885 spin_lock_irqsave(shost->host_lock, flags);
2886 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2887 spin_unlock_irqrestore(shost->host_lock, flags);
2888
2889 /* ensure any stgt delete functions are done */
2890 fc_flush_work(shost);
19a7b4ae 2891
1da177e4 2892 /* initiate a scan of the target */
aedf3497
JS		 2893 spin_lock_irqsave(shost->host_lock, flags);
2894 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2895 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2896 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf 2897 scsi_target_unblock(&rport->dev);
19a7b4ae 2898 }
1da177e4
LT		 2899}
2900EXPORT_SYMBOL(fc_remote_port_rolechg);
2901
2902/**
eb44820c 2903 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
92740b24 2904 * @work: rport target that failed to reappear in the allotted time.
eb44820c
RL		 2905 *
2906 * Description: An attempt to delete a remote port blocks, and if it fails
2907 * to return in the allotted time this gets called.
2908 */
1da177e4 2909static void
c4028958 2910fc_timeout_deleted_rport(struct work_struct *work)
1da177e4 2911{
c4028958
DH		 2912 struct fc_rport *rport =
2913 container_of(work, struct fc_rport, dev_loss_work.work);
19a7b4ae 2914 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 2915 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
19a7b4ae 2916 unsigned long flags;
1da177e4 2917
19a7b4ae 2918 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2919
aedf3497
JS		 2920 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2921
1da177e4 2922 /*
92740b24
JS		 2923 * If the port is ONLINE, then it came back. If it was a SCSI
2924 * target, validate it still is. If not, tear down the
2925 * scsi_target on it.
1da177e4 2926 */
aedf3497 2927 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
92740b24 2928 (rport->scsi_target_id != -1) &&
a53eb5e0 2929 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
19a7b4ae 2930 dev_printk(KERN_ERR, &rport->dev,
aedf3497
JS		 2931 "blocked FC remote port time out: no longer"
2932 " a FCP target, removing starget\n");
aedf3497 2933 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf
JS		 2934 scsi_target_unblock(&rport->dev);
2935 fc_queue_work(shost, &rport->stgt_delete_work);
19a7b4ae
JSEC		 2936 return;
2937 }
1da177e4 2938
92740b24 2939 /* NOOP state - we're flushing workq's */
19a7b4ae
JSEC		 2940 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
2941 spin_unlock_irqrestore(shost->host_lock, flags);
2942 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 2943 "blocked FC remote port time out: leaving"
2944 " rport%s alone\n",
2945 (rport->scsi_target_id != -1) ? " and starget" : "");
19a7b4ae
JSEC		 2946 return;
2947 }
1da177e4 2948
92740b24
JS		 2949 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
2950 (rport->scsi_target_id == -1)) {
aedf3497
JS		 2951 list_del(&rport->peers);
2952 rport->port_state = FC_PORTSTATE_DELETED;
19a7b4ae 2953 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 2954 "blocked FC remote port time out: removing"
2955 " rport%s\n",
2956 (rport->scsi_target_id != -1) ? " and starget" : "");
aedf3497
JS		 2957 fc_queue_work(shost, &rport->rport_delete_work);
2958 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC		 2959 return;
2960 }
1da177e4 2961
19a7b4ae
JSEC		 2962 dev_printk(KERN_ERR, &rport->dev,
2963 "blocked FC remote port time out: removing target and "
2964 "saving binding\n");
2965
aedf3497 2966 list_move_tail(&rport->peers, &fc_host->rport_bindings);
1da177e4
LT		 2967
2968 /*
19a7b4ae
JSEC		 2969 * Note: We do not remove or clear the hostdata area. This allows
2970 * host-specific target data to persist along with the
2971 * scsi_target_id. It's up to the host to manage it's hostdata area.
1da177e4 2972 */
1da177e4 2973
19a7b4ae
JSEC		 2974 /*
2975 * Reinitialize port attributes that may change if the port comes back.
2976 */
2977 rport->maxframe_size = -1;
2978 rport->supported_classes = FC_COS_UNSPECIFIED;
a53eb5e0 2979 rport->roles = FC_PORT_ROLE_UNKNOWN;
aedf3497 2980 rport->port_state = FC_PORTSTATE_NOTPRESENT;
1da177e4 2981
19a7b4ae 2982 /* remove the identifiers that aren't used in the consisting binding */
aedf3497 2983 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 2984 case FC_TGTID_BIND_BY_WWPN:
2985 rport->node_name = -1;
2986 rport->port_id = -1;
2987 break;
2988 case FC_TGTID_BIND_BY_WWNN:
2989 rport->port_name = -1;
2990 rport->port_id = -1;
2991 break;
2992 case FC_TGTID_BIND_BY_ID:
2993 rport->node_name = -1;
2994 rport->port_name = -1;
2995 break;
2996 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2997 break;
2998 }
2999
19a7b4ae
JSEC		 3000 /*
3001 * As this only occurs if the remote port (scsi target)
3002 * went away and didn't come back - we'll remove
3003 * all attached scsi devices.
3004 */
42e33148 3005 spin_unlock_irqrestore(shost->host_lock, flags);
a0785edf
JS		 3006
3007 scsi_target_unblock(&rport->dev);
3008 fc_queue_work(shost, &rport->stgt_delete_work);
1da177e4 3009}
1da177e4 3010
0f29b966 3011/**
eb44820c 3012 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
c4028958 3013 * @work: rport to terminate io on.
0f29b966
JS		 3014 *
3015 * Notes: Only requests the failure of the io, not that all are flushed
3016 * prior to returning.
eb44820c 3017 */
0f29b966 3018static void
c4028958 3019fc_timeout_fail_rport_io(struct work_struct *work)
0f29b966 3020{
c4028958
DH		 3021 struct fc_rport *rport =
3022 container_of(work, struct fc_rport, fail_io_work.work);
0f29b966
JS		 3023 struct Scsi_Host *shost = rport_to_shost(rport);
3024 struct fc_internal *i = to_fc_internal(shost->transportt);
3025
3026 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3027 return;
3028
3029 i->f->terminate_rport_io(rport);
3030}
3031
1da177e4
LT		 3032/**
3033 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
c4028958 3034 * @work: remote port to be scanned.
eb44820c 3035 */
1da177e4 3036static void
c4028958 3037fc_scsi_scan_rport(struct work_struct *work)
1da177e4 3038{
c4028958
DH		 3039 struct fc_rport *rport =
3040 container_of(work, struct fc_rport, scan_work);
aedf3497 3041 struct Scsi_Host *shost = rport_to_shost(rport);
03f002f7 3042 struct fc_internal *i = to_fc_internal(shost->transportt);
42e33148
JSEC		 3043 unsigned long flags;
3044
aedf3497 3045 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
03f002f7
CS		 3046 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3047 !(i->f->disable_target_scan)) {
aedf3497
JS		 3048 scsi_scan_target(&rport->dev, rport->channel,
3049 rport->scsi_target_id, SCAN_WILD_CARD, 1);
42e33148 3050 }
aedf3497
JS		 3051
3052 spin_lock_irqsave(shost->host_lock, flags);
3053 rport->flags &= ~FC_RPORT_SCAN_PENDING;
42e33148
JSEC		 3054 spin_unlock_irqrestore(shost->host_lock, flags);
3055}
3056
3057
a53eb5e0
JS		 3058/**
3059 * fc_vport_create - allocates and creates a FC virtual port.
3060 * @shost: scsi host the virtual port is connected to.
3061 * @channel: Channel on shost port connected to.
3062 * @pdev: parent device for vport
3063 * @ids: The world wide names, FC4 port roles, etc for
3064 * the virtual port.
3065 * @ret_vport: The pointer to the created vport.
3066 *
3067 * Allocates and creates the vport structure, calls the parent host
3068 * to instantiate the vport, the completes w/ class and sysfs creation.
3069 *
3070 * Notes:
3071 * This routine assumes no locks are held on entry.
eb44820c 3072 */
a53eb5e0
JS		 3073static int
3074fc_vport_create(struct Scsi_Host *shost, int channel, struct device *pdev,
3075 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3076{
3077 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3078 struct fc_internal *fci = to_fc_internal(shost->transportt);
3079 struct fc_vport *vport;
3080 struct device *dev;
3081 unsigned long flags;
3082 size_t size;
3083 int error;
3084
3085 *ret_vport = NULL;
3086
3087 if ( ! fci->f->vport_create)
3088 return -ENOENT;
3089
3090 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3091 vport = kzalloc(size, GFP_KERNEL);
3092 if (unlikely(!vport)) {
3093 printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
3094 return -ENOMEM;
3095 }
3096
3097 vport->vport_state = FC_VPORT_UNKNOWN;
3098 vport->vport_last_state = FC_VPORT_UNKNOWN;
3099 vport->node_name = ids->node_name;
3100 vport->port_name = ids->port_name;
3101 vport->roles = ids->roles;
3102 vport->vport_type = ids->vport_type;
3103 if (fci->f->dd_fcvport_size)
3104 vport->dd_data = &vport[1];
3105 vport->shost = shost;
3106 vport->channel = channel;
3107 vport->flags = FC_VPORT_CREATING;
9ef3e4a4 3108 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
a53eb5e0
JS		 3109
3110 spin_lock_irqsave(shost->host_lock, flags);
3111
3112 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3113 spin_unlock_irqrestore(shost->host_lock, flags);
3114 kfree(vport);
3115 return -ENOSPC;
3116 }
3117 fc_host->npiv_vports_inuse++;
3118 vport->number = fc_host->next_vport_number++;
3119 list_add_tail(&vport->peers, &fc_host->vports);
3120 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3121
3122 spin_unlock_irqrestore(shost->host_lock, flags);
3123
3124 dev = &vport->dev;
3125 device_initialize(dev); /* takes self reference */
3126 dev->parent = get_device(pdev); /* takes parent reference */
3127 dev->release = fc_vport_dev_release;
3128 sprintf(dev->bus_id, "vport-%d:%d-%d",
3129 shost->host_no, channel, vport->number);
3130 transport_setup_device(dev);
3131
3132 error = device_add(dev);
3133 if (error) {
3134 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3135 goto delete_vport;
3136 }
3137 transport_add_device(dev);
3138 transport_configure_device(dev);
3139
3140 error = fci->f->vport_create(vport, ids->disable);
3141 if (error) {
3142 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3143 goto delete_vport_all;
3144 }
3145
3146 /*
3147 * if the parent isn't the physical adapter's Scsi_Host, ensure
3148 * the Scsi_Host at least contains ia symlink to the vport.
3149 */
3150 if (pdev != &shost->shost_gendev) {
3151 error = sysfs_create_link(&shost->shost_gendev.kobj,
3152 &dev->kobj, dev->bus_id);
3153 if (error)
3154 printk(KERN_ERR
3155 "%s: Cannot create vport symlinks for "
3156 "%s, err=%d\n",
3157 __FUNCTION__, dev->bus_id, error);
3158 }
3159 spin_lock_irqsave(shost->host_lock, flags);
3160 vport->flags &= ~FC_VPORT_CREATING;
3161 spin_unlock_irqrestore(shost->host_lock, flags);
3162
3163 dev_printk(KERN_NOTICE, pdev,
3164 "%s created via shost%d channel %d\n", dev->bus_id,
3165 shost->host_no, channel);
3166
3167 *ret_vport = vport;
3168
3169 return 0;
3170
3171delete_vport_all:
3172 transport_remove_device(dev);
3173 device_del(dev);
3174delete_vport:
3175 transport_destroy_device(dev);
3176 spin_lock_irqsave(shost->host_lock, flags);
3177 list_del(&vport->peers);
3178 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3179 fc_host->npiv_vports_inuse--;
3180 spin_unlock_irqrestore(shost->host_lock, flags);
3181 put_device(dev->parent);
3182 kfree(vport);
3183
3184 return error;
3185}
3186
3187
3188/**
3189 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3190 * @vport: fc_vport to be terminated
3191 *
3192 * Calls the LLDD vport_delete() function, then deallocates and removes
3193 * the vport from the shost and object tree.
3194 *
3195 * Notes:
3196 * This routine assumes no locks are held on entry.
eb44820c 3197 */
a53eb5e0
JS		 3198int
3199fc_vport_terminate(struct fc_vport *vport)
3200{
3201 struct Scsi_Host *shost = vport_to_shost(vport);
3202 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3203 struct fc_internal *i = to_fc_internal(shost->transportt);
3204 struct device *dev = &vport->dev;
3205 unsigned long flags;
3206 int stat;
3207
3208 spin_lock_irqsave(shost->host_lock, flags);
3209 if (vport->flags & FC_VPORT_CREATING) {
3210 spin_unlock_irqrestore(shost->host_lock, flags);
3211 return -EBUSY;
3212 }
3213 if (vport->flags & (FC_VPORT_DEL)) {
3214 spin_unlock_irqrestore(shost->host_lock, flags);
3215 return -EALREADY;
3216 }
3217 vport->flags |= FC_VPORT_DELETING;
3218 spin_unlock_irqrestore(shost->host_lock, flags);
3219
3220 if (i->f->vport_delete)
3221 stat = i->f->vport_delete(vport);
3222 else
3223 stat = -ENOENT;
3224
3225 spin_lock_irqsave(shost->host_lock, flags);
3226 vport->flags &= ~FC_VPORT_DELETING;
3227 if (!stat) {
3228 vport->flags |= FC_VPORT_DELETED;
3229 list_del(&vport->peers);
3230 fc_host->npiv_vports_inuse--;
3231 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3232 }
3233 spin_unlock_irqrestore(shost->host_lock, flags);
3234
3235 if (stat)
3236 return stat;
3237
3238 if (dev->parent != &shost->shost_gendev)
3239 sysfs_remove_link(&shost->shost_gendev.kobj, dev->bus_id);
3240 transport_remove_device(dev);
3241 device_del(dev);
3242 transport_destroy_device(dev);
3243
3244 /*
3245 * Removing our self-reference should mean our
3246 * release function gets called, which will drop the remaining
3247 * parent reference and free the data structure.
3248 */
3249 put_device(dev); /* for self-reference */
3250
3251 return 0; /* SUCCESS */
3252}
3253EXPORT_SYMBOL(fc_vport_terminate);
3254
9ef3e4a4
JS		 3255/**
3256 * fc_vport_sched_delete - workq-based delete request for a vport
9ef3e4a4 3257 * @work: vport to be deleted.
eb44820c 3258 */
9ef3e4a4
JS		 3259static void
3260fc_vport_sched_delete(struct work_struct *work)
3261{
3262 struct fc_vport *vport =
3263 container_of(work, struct fc_vport, vport_delete_work);
3264 int stat;
3265
3266 stat = fc_vport_terminate(vport);
3267 if (stat)
3268 dev_printk(KERN_ERR, vport->dev.parent,
3269 "%s: %s could not be deleted created via "
3270 "shost%d channel %d - error %d\n", __FUNCTION__,
3271 vport->dev.bus_id, vport->shost->host_no,
3272 vport->channel, stat);
3273}
3274
a53eb5e0 3275
9ef3e4a4
JS		 3276/* Original Author: Martin Hicks */
3277MODULE_AUTHOR("James Smart");
1da177e4
LT		 3278MODULE_DESCRIPTION("FC Transport Attributes");
3279MODULE_LICENSE("GPL");
3280
3281module_init(fc_transport_init);
3282module_exit(fc_transport_exit);
Linux kernel - Deliverables
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