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fnic: Using rport->dd_data to check rport online instead of rport_lookup.
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / scsi_transport_fc.c
CommitLineData
9ef3e4a4 1/*
1da177e4
LT		 2 * FiberChannel transport specific attributes exported to sysfs.
3 *
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * ========
21 *
a53eb5e0 22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
1da177e4
LT		 23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
9ef3e4a4 25 * Add vports, etc
1da177e4
LT		 26 *
27 */
28#include <linux/module.h>
29#include <linux/init.h>
5a0e3ad6 30#include <linux/slab.h>
65d430fa 31#include <linux/delay.h>
ecc30990 32#include <linux/kernel.h>
1da177e4
LT		 33#include <scsi/scsi_device.h>
34#include <scsi/scsi_host.h>
35#include <scsi/scsi_transport.h>
36#include <scsi/scsi_transport_fc.h>
c829c394 37#include <scsi/scsi_cmnd.h>
84314fd4
JS		 38#include <net/netlink.h>
39#include <scsi/scsi_netlink_fc.h>
9e4f5e29 40#include <scsi/scsi_bsg_fc.h>
1da177e4
LT		 41#include "scsi_priv.h"
42
aedf3497 43static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
9ef3e4a4 44static void fc_vport_sched_delete(struct work_struct *work);
a30c3f69 45static int fc_vport_setup(struct Scsi_Host *shost, int channel,
a53eb5e0
JS		 46 struct device *pdev, struct fc_vport_identifiers *ids,
47 struct fc_vport **vport);
9e4f5e29
JS		 48static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
49static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
50static void fc_bsg_remove(struct request_queue *);
51static void fc_bsg_goose_queue(struct fc_rport *);
a53eb5e0 52
43ca910a
MC		 53/*
54 * Module Parameters
55 */
56
57/*
58 * dev_loss_tmo: the default number of seconds that the FC transport
59 * should insulate the loss of a remote port.
60 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
61 */
62static unsigned int fc_dev_loss_tmo = 60; /* seconds */
63
64module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
65MODULE_PARM_DESC(dev_loss_tmo,
66 "Maximum number of seconds that the FC transport should"
67 " insulate the loss of a remote port. Once this value is"
68 " exceeded, the scsi target is removed. Value should be"
69 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
70 " fast_io_fail_tmo is not set.");
71
1da177e4
LT		 72/*
73 * Redefine so that we can have same named attributes in the
74 * sdev/starget/host objects.
75 */
ee959b00
TJ		 76#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
77struct device_attribute device_attr_##_prefix##_##_name = \
1da177e4
LT		 78 __ATTR(_name,_mode,_show,_store)
79
80#define fc_enum_name_search(title, table_type, table) \
81static const char *get_fc_##title##_name(enum table_type table_key) \
82{ \
83 int i; \
84 char *name = NULL; \
85 \
6391a113 86 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 87 if (table[i].value == table_key) { \
88 name = table[i].name; \
89 break; \
90 } \
91 } \
92 return name; \
93}
94
95#define fc_enum_name_match(title, table_type, table) \
96static int get_fc_##title##_match(const char *table_key, \
97 enum table_type *value) \
98{ \
99 int i; \
100 \
6391a113 101 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 102 if (strncmp(table_key, table[i].name, \
103 table[i].matchlen) == 0) { \
104 *value = table[i].value; \
105 return 0; /* success */ \
106 } \
107 } \
108 return 1; /* failure */ \
109}
110
111
112/* Convert fc_port_type values to ascii string name */
113static struct {
114 enum fc_port_type value;
115 char *name;
116} fc_port_type_names[] = {
117 { FC_PORTTYPE_UNKNOWN, "Unknown" },
118 { FC_PORTTYPE_OTHER, "Other" },
119 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
120 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
121 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
122 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
951948a3 123 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
a53eb5e0 124 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
1da177e4
LT		 125};
126fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
127#define FC_PORTTYPE_MAX_NAMELEN 50
128
a53eb5e0
JS		 129/* Reuse fc_port_type enum function for vport_type */
130#define get_fc_vport_type_name get_fc_port_type_name
131
1da177e4 132
84314fd4
JS		 133/* Convert fc_host_event_code values to ascii string name */
134static const struct {
135 enum fc_host_event_code value;
136 char *name;
137} fc_host_event_code_names[] = {
138 { FCH_EVT_LIP, "lip" },
139 { FCH_EVT_LINKUP, "link_up" },
140 { FCH_EVT_LINKDOWN, "link_down" },
141 { FCH_EVT_LIPRESET, "lip_reset" },
142 { FCH_EVT_RSCN, "rscn" },
143 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
144 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
145 { FCH_EVT_PORT_ONLINE, "port_online" },
146 { FCH_EVT_PORT_OFFLINE, "port_offline" },
147 { FCH_EVT_PORT_FABRIC, "port_fabric" },
148 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
149 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
150};
151fc_enum_name_search(host_event_code, fc_host_event_code,
152 fc_host_event_code_names)
153#define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
154
155
1da177e4
LT		 156/* Convert fc_port_state values to ascii string name */
157static struct {
158 enum fc_port_state value;
159 char *name;
160} fc_port_state_names[] = {
161 { FC_PORTSTATE_UNKNOWN, "Unknown" },
162 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
163 { FC_PORTSTATE_ONLINE, "Online" },
164 { FC_PORTSTATE_OFFLINE, "Offline" },
165 { FC_PORTSTATE_BLOCKED, "Blocked" },
166 { FC_PORTSTATE_BYPASSED, "Bypassed" },
167 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
168 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
169 { FC_PORTSTATE_ERROR, "Error" },
170 { FC_PORTSTATE_LOOPBACK, "Loopback" },
42e33148 171 { FC_PORTSTATE_DELETED, "Deleted" },
1da177e4
LT		 172};
173fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
174#define FC_PORTSTATE_MAX_NAMELEN 20
175
176
a53eb5e0
JS		 177/* Convert fc_vport_state values to ascii string name */
178static struct {
179 enum fc_vport_state value;
180 char *name;
181} fc_vport_state_names[] = {
182 { FC_VPORT_UNKNOWN, "Unknown" },
183 { FC_VPORT_ACTIVE, "Active" },
184 { FC_VPORT_DISABLED, "Disabled" },
185 { FC_VPORT_LINKDOWN, "Linkdown" },
186 { FC_VPORT_INITIALIZING, "Initializing" },
187 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
188 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
189 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
190 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
191 { FC_VPORT_FAILED, "VPort Failed" },
192};
193fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
194#define FC_VPORTSTATE_MAX_NAMELEN 24
195
196/* Reuse fc_vport_state enum function for vport_last_state */
197#define get_fc_vport_last_state_name get_fc_vport_state_name
198
199
1da177e4 200/* Convert fc_tgtid_binding_type values to ascii string name */
0ad78200 201static const struct {
1da177e4
LT		 202 enum fc_tgtid_binding_type value;
203 char *name;
204 int matchlen;
205} fc_tgtid_binding_type_names[] = {
206 { FC_TGTID_BIND_NONE, "none", 4 },
207 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
208 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
209 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
210};
211fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
212 fc_tgtid_binding_type_names)
213fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
214 fc_tgtid_binding_type_names)
215#define FC_BINDTYPE_MAX_NAMELEN 30
216
217
218#define fc_bitfield_name_search(title, table) \
219static ssize_t \
220get_fc_##title##_names(u32 table_key, char *buf) \
221{ \
222 char *prefix = ""; \
223 ssize_t len = 0; \
224 int i; \
225 \
6391a113 226 for (i = 0; i < ARRAY_SIZE(table); i++) { \
1da177e4
LT		 227 if (table[i].value & table_key) { \
228 len += sprintf(buf + len, "%s%s", \
229 prefix, table[i].name); \
230 prefix = ", "; \
231 } \
232 } \
233 len += sprintf(buf + len, "\n"); \
234 return len; \
235}
236
237
238/* Convert FC_COS bit values to ascii string name */
0ad78200 239static const struct {
1da177e4
LT		 240 u32 value;
241 char *name;
242} fc_cos_names[] = {
243 { FC_COS_CLASS1, "Class 1" },
244 { FC_COS_CLASS2, "Class 2" },
245 { FC_COS_CLASS3, "Class 3" },
246 { FC_COS_CLASS4, "Class 4" },
247 { FC_COS_CLASS6, "Class 6" },
248};
249fc_bitfield_name_search(cos, fc_cos_names)
250
251
252/* Convert FC_PORTSPEED bit values to ascii string name */
0ad78200 253static const struct {
1da177e4
LT		 254 u32 value;
255 char *name;
256} fc_port_speed_names[] = {
257 { FC_PORTSPEED_1GBIT, "1 Gbit" },
258 { FC_PORTSPEED_2GBIT, "2 Gbit" },
259 { FC_PORTSPEED_4GBIT, "4 Gbit" },
260 { FC_PORTSPEED_10GBIT, "10 Gbit" },
c3d2350a
JS		 261 { FC_PORTSPEED_8GBIT, "8 Gbit" },
262 { FC_PORTSPEED_16GBIT, "16 Gbit" },
624f28be 263 { FC_PORTSPEED_32GBIT, "32 Gbit" },
c21a2c1a
DK		 264 { FC_PORTSPEED_20GBIT, "20 Gbit" },
265 { FC_PORTSPEED_40GBIT, "40 Gbit" },
266 { FC_PORTSPEED_50GBIT, "50 Gbit" },
267 { FC_PORTSPEED_100GBIT, "100 Gbit" },
c749e6bc 268 { FC_PORTSPEED_25GBIT, "25 Gbit" },
1da177e4
LT		 269 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
270};
271fc_bitfield_name_search(port_speed, fc_port_speed_names)
272
273
274static int
275show_fc_fc4s (char *buf, u8 *fc4_list)
276{
277 int i, len=0;
278
279 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
280 len += sprintf(buf + len , "0x%02x ", *fc4_list);
281 len += sprintf(buf + len, "\n");
282 return len;
283}
284
285
a53eb5e0 286/* Convert FC_PORT_ROLE bit values to ascii string name */
0ad78200 287static const struct {
1da177e4
LT		 288 u32 value;
289 char *name;
a53eb5e0
JS		 290} fc_port_role_names[] = {
291 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
292 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
293 { FC_PORT_ROLE_IP_PORT, "IP Port" },
1da177e4 294};
a53eb5e0 295fc_bitfield_name_search(port_roles, fc_port_role_names)
1da177e4
LT		 296
297/*
298 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
299 */
300#define FC_WELLKNOWN_PORTID_MASK 0xfffff0
301#define FC_WELLKNOWN_ROLE_MASK 0x00000f
302#define FC_FPORT_PORTID 0x00000e
303#define FC_FABCTLR_PORTID 0x00000d
304#define FC_DIRSRVR_PORTID 0x00000c
305#define FC_TIMESRVR_PORTID 0x00000b
306#define FC_MGMTSRVR_PORTID 0x00000a
307
308
c4028958
DH		 309static void fc_timeout_deleted_rport(struct work_struct *work);
310static void fc_timeout_fail_rport_io(struct work_struct *work);
311static void fc_scsi_scan_rport(struct work_struct *work);
1da177e4
LT		 312
313/*
314 * Attribute counts pre object type...
315 * Increase these values if you add attributes
316 */
317#define FC_STARGET_NUM_ATTRS 3
0f29b966 318#define FC_RPORT_NUM_ATTRS 10
a53eb5e0 319#define FC_VPORT_NUM_ATTRS 9
bb8ef587 320#define FC_HOST_NUM_ATTRS 29
1da177e4
LT		 321
322struct fc_internal {
323 struct scsi_transport_template t;
324 struct fc_function_template *f;
325
326 /*
327 * For attributes : each object has :
328 * An array of the actual attributes structures
329 * An array of null-terminated pointers to the attribute
330 * structures - used for mid-layer interaction.
331 *
332 * The attribute containers for the starget and host are are
333 * part of the midlayer. As the remote port is specific to the
334 * fc transport, we must provide the attribute container.
335 */
ee959b00 336 struct device_attribute private_starget_attrs[
1da177e4 337 FC_STARGET_NUM_ATTRS];
ee959b00 338 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
1da177e4 339
ee959b00
TJ		 340 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
341 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
1da177e4
LT		 342
343 struct transport_container rport_attr_cont;
ee959b00
TJ		 344 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
345 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
a53eb5e0
JS		 346
347 struct transport_container vport_attr_cont;
ee959b00
TJ		 348 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
349 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
1da177e4
LT		 350};
351
352#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
353
d0a7e574 354static int fc_target_setup(struct transport_container *tc, struct device *dev,
ee959b00 355 struct device *cdev)
1da177e4
LT		 356{
357 struct scsi_target *starget = to_scsi_target(dev);
358 struct fc_rport *rport = starget_to_rport(starget);
359
360 /*
361 * if parent is remote port, use values from remote port.
362 * Otherwise, this host uses the fc_transport, but not the
363 * remote port interface. As such, initialize to known non-values.
364 */
365 if (rport) {
366 fc_starget_node_name(starget) = rport->node_name;
367 fc_starget_port_name(starget) = rport->port_name;
368 fc_starget_port_id(starget) = rport->port_id;
369 } else {
370 fc_starget_node_name(starget) = -1;
371 fc_starget_port_name(starget) = -1;
372 fc_starget_port_id(starget) = -1;
373 }
374
375 return 0;
376}
377
378static DECLARE_TRANSPORT_CLASS(fc_transport_class,
379 "fc_transport",
380 fc_target_setup,
381 NULL,
382 NULL);
383
d0a7e574 384static int fc_host_setup(struct transport_container *tc, struct device *dev,
ee959b00 385 struct device *cdev)
1da177e4
LT		 386{
387 struct Scsi_Host *shost = dev_to_shost(dev);
aedf3497 388 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4 389
9ef3e4a4 390 /*
1da177e4
LT		 391 * Set default values easily detected by the midlayer as
392 * failure cases. The scsi lldd is responsible for initializing
393 * all transport attributes to valid values per host.
394 */
aedf3497
JS		 395 fc_host->node_name = -1;
396 fc_host->port_name = -1;
397 fc_host->permanent_port_name = -1;
398 fc_host->supported_classes = FC_COS_UNSPECIFIED;
399 memset(fc_host->supported_fc4s, 0,
400 sizeof(fc_host->supported_fc4s));
aedf3497
JS		 401 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
402 fc_host->maxframe_size = -1;
a53eb5e0 403 fc_host->max_npiv_vports = 0;
aedf3497
JS		 404 memset(fc_host->serial_number, 0,
405 sizeof(fc_host->serial_number));
bb8ef587
NP		 406 memset(fc_host->manufacturer, 0,
407 sizeof(fc_host->manufacturer));
408 memset(fc_host->model, 0,
409 sizeof(fc_host->model));
410 memset(fc_host->model_description, 0,
411 sizeof(fc_host->model_description));
412 memset(fc_host->hardware_version, 0,
413 sizeof(fc_host->hardware_version));
414 memset(fc_host->driver_version, 0,
415 sizeof(fc_host->driver_version));
416 memset(fc_host->firmware_version, 0,
417 sizeof(fc_host->firmware_version));
418 memset(fc_host->optionrom_version, 0,
419 sizeof(fc_host->optionrom_version));
aedf3497
JS		 420
421 fc_host->port_id = -1;
422 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
423 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
424 memset(fc_host->active_fc4s, 0,
425 sizeof(fc_host->active_fc4s));
426 fc_host->speed = FC_PORTSPEED_UNKNOWN;
427 fc_host->fabric_name = -1;
b8d08210
JS		 428 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
429 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
aedf3497
JS		 430
431 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
432
433 INIT_LIST_HEAD(&fc_host->rports);
434 INIT_LIST_HEAD(&fc_host->rport_bindings);
a53eb5e0 435 INIT_LIST_HEAD(&fc_host->vports);
aedf3497
JS		 436 fc_host->next_rport_number = 0;
437 fc_host->next_target_id = 0;
a53eb5e0
JS		 438 fc_host->next_vport_number = 0;
439 fc_host->npiv_vports_inuse = 0;
aedf3497 440
aab0de24
KS		 441 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
442 "fc_wq_%d", shost->host_no);
d8537548 443 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
aedf3497
JS		 444 if (!fc_host->work_q)
445 return -ENOMEM;
446
43ca910a 447 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
aab0de24
KS		 448 snprintf(fc_host->devloss_work_q_name,
449 sizeof(fc_host->devloss_work_q_name),
450 "fc_dl_%d", shost->host_no);
d8537548
KC		 451 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
452 fc_host->devloss_work_q_name);
aedf3497
JS		 453 if (!fc_host->devloss_work_q) {
454 destroy_workqueue(fc_host->work_q);
455 fc_host->work_q = NULL;
456 return -ENOMEM;
457 }
458
9e4f5e29
JS		 459 fc_bsg_hostadd(shost, fc_host);
460 /* ignore any bsg add error - we just can't do sgio */
461
462 return 0;
463}
464
465static int fc_host_remove(struct transport_container *tc, struct device *dev,
466 struct device *cdev)
467{
468 struct Scsi_Host *shost = dev_to_shost(dev);
469 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
470
471 fc_bsg_remove(fc_host->rqst_q);
1da177e4
LT		 472 return 0;
473}
474
475static DECLARE_TRANSPORT_CLASS(fc_host_class,
476 "fc_host",
477 fc_host_setup,
9e4f5e29 478 fc_host_remove,
1da177e4
LT		 479 NULL);
480
481/*
482 * Setup and Remove actions for remote ports are handled
483 * in the service functions below.
484 */
485static DECLARE_TRANSPORT_CLASS(fc_rport_class,
486 "fc_remote_ports",
487 NULL,
488 NULL,
489 NULL);
490
a53eb5e0
JS		 491/*
492 * Setup and Remove actions for virtual ports are handled
493 * in the service functions below.
494 */
495static DECLARE_TRANSPORT_CLASS(fc_vport_class,
496 "fc_vports",
497 NULL,
498 NULL,
499 NULL);
500
eb44820c 501/*
84314fd4 502 * Netlink Infrastructure
eb44820c 503 */
84314fd4
JS		 504
505static atomic_t fc_event_seq;
506
507/**
508 * fc_get_event_number - Obtain the next sequential FC event number
509 *
510 * Notes:
eb44820c 511 * We could have inlined this, but it would have required fc_event_seq to
84314fd4
JS		 512 * be exposed. For now, live with the subroutine call.
513 * Atomic used to avoid lock/unlock...
eb44820c 514 */
84314fd4
JS		 515u32
516fc_get_event_number(void)
517{
518 return atomic_add_return(1, &fc_event_seq);
519}
520EXPORT_SYMBOL(fc_get_event_number);
521
522
523/**
524 * fc_host_post_event - called to post an even on an fc_host.
84314fd4
JS		 525 * @shost: host the event occurred on
526 * @event_number: fc event number obtained from get_fc_event_number()
527 * @event_code: fc_host event being posted
528 * @event_data: 32bits of data for the event being posted
529 *
530 * Notes:
531 * This routine assumes no locks are held on entry.
eb44820c 532 */
84314fd4
JS		 533void
534fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
535 enum fc_host_event_code event_code, u32 event_data)
536{
537 struct sk_buff *skb;
538 struct nlmsghdr *nlh;
539 struct fc_nl_event *event;
540 const char *name;
e07ebea0 541 u32 len;
84314fd4
JS		 542 int err;
543
544 if (!scsi_nl_sock) {
545 err = -ENOENT;
546 goto send_fail;
547 }
548
549 len = FC_NL_MSGALIGN(sizeof(*event));
84314fd4 550
e07ebea0 551 skb = nlmsg_new(len, GFP_KERNEL);
84314fd4
JS		 552 if (!skb) {
553 err = -ENOBUFS;
554 goto send_fail;
555 }
556
e07ebea0 557 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
84314fd4
JS		 558 if (!nlh) {
559 err = -ENOBUFS;
560 goto send_fail_skb;
561 }
e07ebea0 562 event = nlmsg_data(nlh);
84314fd4
JS		 563
564 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
565 FC_NL_ASYNC_EVENT, len);
566 event->seconds = get_seconds();
567 event->vendor_id = 0;
568 event->host_no = shost->host_no;
569 event->event_datalen = sizeof(u32); /* bytes */
570 event->event_num = event_number;
571 event->event_code = event_code;
572 event->event_data = event_data;
573
ff491a73
PNA		 574 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
575 GFP_KERNEL);
84314fd4
JS		 576 return;
577
578send_fail_skb:
579 kfree_skb(skb);
580send_fail:
581 name = get_fc_host_event_code_name(event_code);
582 printk(KERN_WARNING
583 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
cadbd4a5 584 __func__, shost->host_no,
84314fd4
JS		 585 (name) ? name : "<unknown>", event_data, err);
586 return;
587}
588EXPORT_SYMBOL(fc_host_post_event);
589
590
591/**
eb44820c 592 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
84314fd4
JS		 593 * @shost: host the event occurred on
594 * @event_number: fc event number obtained from get_fc_event_number()
595 * @data_len: amount, in bytes, of vendor unique data
596 * @data_buf: pointer to vendor unique data
eb44820c 597 * @vendor_id: Vendor id
84314fd4
JS		 598 *
599 * Notes:
600 * This routine assumes no locks are held on entry.
eb44820c 601 */
84314fd4
JS		 602void
603fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
f14e2e29 604 u32 data_len, char * data_buf, u64 vendor_id)
84314fd4
JS		 605{
606 struct sk_buff *skb;
607 struct nlmsghdr *nlh;
608 struct fc_nl_event *event;
e07ebea0 609 u32 len;
84314fd4
JS		 610 int err;
611
612 if (!scsi_nl_sock) {
613 err = -ENOENT;
614 goto send_vendor_fail;
615 }
616
617 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
84314fd4 618
e07ebea0 619 skb = nlmsg_new(len, GFP_KERNEL);
84314fd4
JS		 620 if (!skb) {
621 err = -ENOBUFS;
622 goto send_vendor_fail;
623 }
624
e07ebea0 625 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
84314fd4
JS		 626 if (!nlh) {
627 err = -ENOBUFS;
628 goto send_vendor_fail_skb;
629 }
e07ebea0 630 event = nlmsg_data(nlh);
84314fd4
JS		 631
632 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
633 FC_NL_ASYNC_EVENT, len);
634 event->seconds = get_seconds();
635 event->vendor_id = vendor_id;
636 event->host_no = shost->host_no;
637 event->event_datalen = data_len; /* bytes */
638 event->event_num = event_number;
639 event->event_code = FCH_EVT_VENDOR_UNIQUE;
640 memcpy(&event->event_data, data_buf, data_len);
641
ff491a73
PNA		 642 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
643 GFP_KERNEL);
84314fd4
JS		 644 return;
645
646send_vendor_fail_skb:
647 kfree_skb(skb);
648send_vendor_fail:
649 printk(KERN_WARNING
650 "%s: Dropped Event : host %d vendor_unique - err %d\n",
cadbd4a5 651 __func__, shost->host_no, err);
84314fd4
JS		 652 return;
653}
654EXPORT_SYMBOL(fc_host_post_vendor_event);
655
656
1da177e4
LT		 657
658static __init int fc_transport_init(void)
659{
84314fd4
JS		 660 int error;
661
662 atomic_set(&fc_event_seq, 0);
663
664 error = transport_class_register(&fc_host_class);
a53eb5e0
JS		 665 if (error)
666 return error;
667 error = transport_class_register(&fc_vport_class);
1da177e4 668 if (error)
48de68a4 669 goto unreg_host_class;
1da177e4
LT		 670 error = transport_class_register(&fc_rport_class);
671 if (error)
48de68a4
MC		 672 goto unreg_vport_class;
673 error = transport_class_register(&fc_transport_class);
674 if (error)
675 goto unreg_rport_class;
676 return 0;
677
678unreg_rport_class:
679 transport_class_unregister(&fc_rport_class);
680unreg_vport_class:
681 transport_class_unregister(&fc_vport_class);
682unreg_host_class:
683 transport_class_unregister(&fc_host_class);
684 return error;
1da177e4
LT		 685}
686
687static void __exit fc_transport_exit(void)
688{
689 transport_class_unregister(&fc_transport_class);
690 transport_class_unregister(&fc_rport_class);
691 transport_class_unregister(&fc_host_class);
a53eb5e0 692 transport_class_unregister(&fc_vport_class);
1da177e4
LT		 693}
694
695/*
696 * FC Remote Port Attribute Management
697 */
698
699#define fc_rport_show_function(field, format_string, sz, cast) \
700static ssize_t \
ee959b00
TJ		 701show_fc_rport_##field (struct device *dev, \
702 struct device_attribute *attr, char *buf) \
1da177e4 703{ \
ee959b00 704 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 705 struct Scsi_Host *shost = rport_to_shost(rport); \
706 struct fc_internal *i = to_fc_internal(shost->transportt); \
19a7b4ae
JSEC		 707 if ((i->f->get_rport_##field) && \
708 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 709 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae 710 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
1da177e4
LT		 711 i->f->get_rport_##field(rport); \
712 return snprintf(buf, sz, format_string, cast rport->field); \
713}
714
715#define fc_rport_store_function(field) \
716static ssize_t \
ee959b00
TJ		 717store_fc_rport_##field(struct device *dev, \
718 struct device_attribute *attr, \
719 const char *buf, size_t count) \
1da177e4
LT		 720{ \
721 int val; \
ee959b00 722 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 723 struct Scsi_Host *shost = rport_to_shost(rport); \
724 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 725 char *cp; \
19a7b4ae 726 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
42e33148 727 (rport->port_state == FC_PORTSTATE_DELETED) || \
19a7b4ae
JSEC		 728 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
729 return -EBUSY; \
0f29b966
JS		 730 val = simple_strtoul(buf, &cp, 0); \
731 if (*cp && (*cp != '\n')) \
732 return -EINVAL; \
1da177e4
LT		 733 i->f->set_rport_##field(rport, val); \
734 return count; \
735}
736
737#define fc_rport_rd_attr(field, format_string, sz) \
738 fc_rport_show_function(field, format_string, sz, ) \
ee959b00 739static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 740 show_fc_rport_##field, NULL)
741
742#define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
743 fc_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 744static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 745 show_fc_rport_##field, NULL)
746
747#define fc_rport_rw_attr(field, format_string, sz) \
748 fc_rport_show_function(field, format_string, sz, ) \
749 fc_rport_store_function(field) \
ee959b00 750static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 751 show_fc_rport_##field, \
752 store_fc_rport_##field)
753
754
755#define fc_private_rport_show_function(field, format_string, sz, cast) \
756static ssize_t \
ee959b00
TJ		 757show_fc_rport_##field (struct device *dev, \
758 struct device_attribute *attr, char *buf) \
1da177e4 759{ \
ee959b00 760 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 761 return snprintf(buf, sz, format_string, cast rport->field); \
762}
763
764#define fc_private_rport_rd_attr(field, format_string, sz) \
765 fc_private_rport_show_function(field, format_string, sz, ) \
ee959b00 766static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 767 show_fc_rport_##field, NULL)
768
769#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
770 fc_private_rport_show_function(field, format_string, sz, (cast)) \
ee959b00 771static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1da177e4
LT		 772 show_fc_rport_##field, NULL)
773
774
775#define fc_private_rport_rd_enum_attr(title, maxlen) \
776static ssize_t \
ee959b00
TJ		 777show_fc_rport_##title (struct device *dev, \
778 struct device_attribute *attr, char *buf) \
1da177e4 779{ \
ee959b00 780 struct fc_rport *rport = transport_class_to_rport(dev); \
1da177e4
LT		 781 const char *name; \
782 name = get_fc_##title##_name(rport->title); \
783 if (!name) \
784 return -EINVAL; \
785 return snprintf(buf, maxlen, "%s\n", name); \
786} \
ee959b00 787static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1da177e4
LT		 788 show_fc_rport_##title, NULL)
789
790
791#define SETUP_RPORT_ATTRIBUTE_RD(field) \
ee959b00 792 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 793 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
794 i->private_rport_attrs[count].store = NULL; \
795 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
796 if (i->f->show_rport_##field) \
797 count++
798
799#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
ee959b00 800 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 801 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
802 i->private_rport_attrs[count].store = NULL; \
803 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
804 count++
805
806#define SETUP_RPORT_ATTRIBUTE_RW(field) \
ee959b00 807 i->private_rport_attrs[count] = device_attr_rport_##field; \
1da177e4
LT		 808 if (!i->f->set_rport_##field) { \
809 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
810 i->private_rport_attrs[count].store = NULL; \
811 } \
812 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
813 if (i->f->show_rport_##field) \
814 count++
815
0f29b966
JS		 816#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
817{ \
ee959b00 818 i->private_rport_attrs[count] = device_attr_rport_##field; \
0f29b966
JS		 819 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
820 count++; \
821}
822
1da177e4
LT		 823
824/* The FC Transport Remote Port Attributes: */
825
826/* Fixed Remote Port Attributes */
827
828fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
829
830static ssize_t
ee959b00
TJ		 831show_fc_rport_supported_classes (struct device *dev,
832 struct device_attribute *attr, char *buf)
1da177e4 833{
ee959b00 834 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 835 if (rport->supported_classes == FC_COS_UNSPECIFIED)
836 return snprintf(buf, 20, "unspecified\n");
837 return get_fc_cos_names(rport->supported_classes, buf);
838}
ee959b00 839static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1da177e4
LT		 840 show_fc_rport_supported_classes, NULL);
841
842/* Dynamic Remote Port Attributes */
843
19a7b4ae
JSEC		 844/*
845 * dev_loss_tmo attribute
846 */
43ca910a
MC		 847static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
848{
849 char *cp;
850
851 *val = simple_strtoul(buf, &cp, 0);
852 if ((*cp && (*cp != '\n')) || (*val < 0))
853 return -EINVAL;
854 /*
855 * Check for overflow; dev_loss_tmo is u32
856 */
857 if (*val > UINT_MAX)
858 return -EINVAL;
859
860 return 0;
861}
862
863static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
864 unsigned long val)
19a7b4ae 865{
19a7b4ae
JSEC		 866 struct Scsi_Host *shost = rport_to_shost(rport);
867 struct fc_internal *i = to_fc_internal(shost->transportt);
43ca910a 868
19a7b4ae 869 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
42e33148 870 (rport->port_state == FC_PORTSTATE_DELETED) ||
19a7b4ae
JSEC		 871 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
872 return -EBUSY;
36dd288f
HR		 873 /*
874 * Check for overflow; dev_loss_tmo is u32
875 */
876 if (val > UINT_MAX)
877 return -EINVAL;
878
f2818663
HR		 879 /*
880 * If fast_io_fail is off we have to cap
881 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
882 */
883 if (rport->fast_io_fail_tmo == -1 &&
884 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
885 return -EINVAL;
886
19a7b4ae 887 i->f->set_rport_dev_loss_tmo(rport, val);
43ca910a
MC		 888 return 0;
889}
890
891fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
892static ssize_t
893store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
894 const char *buf, size_t count)
895{
896 struct fc_rport *rport = transport_class_to_rport(dev);
897 unsigned long val;
898 int rc;
899
900 rc = fc_str_to_dev_loss(buf, &val);
901 if (rc)
902 return rc;
903
904 rc = fc_rport_set_dev_loss_tmo(rport, val);
905 if (rc)
906 return rc;
19a7b4ae
JSEC		 907 return count;
908}
ee959b00 909static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
19a7b4ae 910 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1da177e4
LT		 911
912
913/* Private Remote Port Attributes */
914
915fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
916fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
917fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
918
919static ssize_t
ee959b00
TJ		 920show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
921 char *buf)
1da177e4 922{
ee959b00 923 struct fc_rport *rport = transport_class_to_rport(dev);
1da177e4
LT		 924
925 /* identify any roles that are port_id specific */
926 if ((rport->port_id != -1) &&
927 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
928 FC_WELLKNOWN_PORTID_MASK) {
929 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
930 case FC_FPORT_PORTID:
931 return snprintf(buf, 30, "Fabric Port\n");
932 case FC_FABCTLR_PORTID:
933 return snprintf(buf, 30, "Fabric Controller\n");
934 case FC_DIRSRVR_PORTID:
935 return snprintf(buf, 30, "Directory Server\n");
936 case FC_TIMESRVR_PORTID:
937 return snprintf(buf, 30, "Time Server\n");
938 case FC_MGMTSRVR_PORTID:
939 return snprintf(buf, 30, "Management Server\n");
940 default:
941 return snprintf(buf, 30, "Unknown Fabric Entity\n");
942 }
943 } else {
a53eb5e0 944 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1da177e4 945 return snprintf(buf, 20, "unknown\n");
a53eb5e0 946 return get_fc_port_roles_names(rport->roles, buf);
1da177e4
LT		 947 }
948}
ee959b00 949static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1da177e4
LT		 950 show_fc_rport_roles, NULL);
951
952fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
953fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
954
0f29b966
JS		 955/*
956 * fast_io_fail_tmo attribute
957 */
958static ssize_t
ee959b00
TJ		 959show_fc_rport_fast_io_fail_tmo (struct device *dev,
960 struct device_attribute *attr, char *buf)
0f29b966 961{
ee959b00 962 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 963
964 if (rport->fast_io_fail_tmo == -1)
965 return snprintf(buf, 5, "off\n");
966 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
967}
968
969static ssize_t
ee959b00
TJ		 970store_fc_rport_fast_io_fail_tmo(struct device *dev,
971 struct device_attribute *attr, const char *buf,
972 size_t count)
0f29b966
JS		 973{
974 int val;
975 char *cp;
ee959b00 976 struct fc_rport *rport = transport_class_to_rport(dev);
0f29b966
JS		 977
978 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
979 (rport->port_state == FC_PORTSTATE_DELETED) ||
980 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
981 return -EBUSY;
982 if (strncmp(buf, "off", 3) == 0)
983 rport->fast_io_fail_tmo = -1;
984 else {
985 val = simple_strtoul(buf, &cp, 0);
f2818663
HR		 986 if ((*cp && (*cp != '\n')) || (val < 0))
987 return -EINVAL;
988 /*
989 * Cap fast_io_fail by dev_loss_tmo or
990 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
991 */
992 if ((val >= rport->dev_loss_tmo) ||
993 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
0f29b966 994 return -EINVAL;
f2818663 995
0f29b966
JS		 996 rport->fast_io_fail_tmo = val;
997 }
998 return count;
999}
ee959b00 1000static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
0f29b966 1001 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1da177e4
LT		 1002
1003
1004/*
1005 * FC SCSI Target Attribute Management
1006 */
1007
1008/*
1009 * Note: in the target show function we recognize when the remote
732bee7a 1010 * port is in the hierarchy and do not allow the driver to get
1da177e4
LT		 1011 * involved in sysfs functions. The driver only gets involved if
1012 * it's the "old" style that doesn't use rports.
1013 */
1014#define fc_starget_show_function(field, format_string, sz, cast) \
1015static ssize_t \
ee959b00
TJ		 1016show_fc_starget_##field (struct device *dev, \
1017 struct device_attribute *attr, char *buf) \
1da177e4 1018{ \
ee959b00 1019 struct scsi_target *starget = transport_class_to_starget(dev); \
1da177e4
LT		 1020 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1021 struct fc_internal *i = to_fc_internal(shost->transportt); \
1022 struct fc_rport *rport = starget_to_rport(starget); \
1023 if (rport) \
1024 fc_starget_##field(starget) = rport->field; \
1025 else if (i->f->get_starget_##field) \
1026 i->f->get_starget_##field(starget); \
1027 return snprintf(buf, sz, format_string, \
1028 cast fc_starget_##field(starget)); \
1029}
1030
1031#define fc_starget_rd_attr(field, format_string, sz) \
1032 fc_starget_show_function(field, format_string, sz, ) \
ee959b00 1033static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 1034 show_fc_starget_##field, NULL)
1035
1036#define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1037 fc_starget_show_function(field, format_string, sz, (cast)) \
ee959b00 1038static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1da177e4
LT		 1039 show_fc_starget_##field, NULL)
1040
1041#define SETUP_STARGET_ATTRIBUTE_RD(field) \
ee959b00 1042 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 1043 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1044 i->private_starget_attrs[count].store = NULL; \
1045 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1046 if (i->f->show_starget_##field) \
1047 count++
1048
1049#define SETUP_STARGET_ATTRIBUTE_RW(field) \
ee959b00 1050 i->private_starget_attrs[count] = device_attr_starget_##field; \
1da177e4
LT		 1051 if (!i->f->set_starget_##field) { \
1052 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1053 i->private_starget_attrs[count].store = NULL; \
1054 } \
1055 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1056 if (i->f->show_starget_##field) \
1057 count++
1058
1059/* The FC Transport SCSI Target Attributes: */
1060fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1061fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1062fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1063
1064
a53eb5e0
JS		 1065/*
1066 * FC Virtual Port Attribute Management
1067 */
1068
1069#define fc_vport_show_function(field, format_string, sz, cast) \
1070static ssize_t \
ee959b00
TJ		 1071show_fc_vport_##field (struct device *dev, \
1072 struct device_attribute *attr, char *buf) \
a53eb5e0 1073{ \
ee959b00 1074 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1075 struct Scsi_Host *shost = vport_to_shost(vport); \
1076 struct fc_internal *i = to_fc_internal(shost->transportt); \
1077 if ((i->f->get_vport_##field) && \
1078 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1079 i->f->get_vport_##field(vport); \
1080 return snprintf(buf, sz, format_string, cast vport->field); \
1081}
1082
1083#define fc_vport_store_function(field) \
1084static ssize_t \
ee959b00
TJ		 1085store_fc_vport_##field(struct device *dev, \
1086 struct device_attribute *attr, \
1087 const char *buf, size_t count) \
a53eb5e0
JS		 1088{ \
1089 int val; \
ee959b00 1090 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1091 struct Scsi_Host *shost = vport_to_shost(vport); \
1092 struct fc_internal *i = to_fc_internal(shost->transportt); \
1093 char *cp; \
1094 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1095 return -EBUSY; \
1096 val = simple_strtoul(buf, &cp, 0); \
1097 if (*cp && (*cp != '\n')) \
1098 return -EINVAL; \
1099 i->f->set_vport_##field(vport, val); \
1100 return count; \
1101}
1102
1103#define fc_vport_store_str_function(field, slen) \
1104static ssize_t \
ee959b00
TJ		 1105store_fc_vport_##field(struct device *dev, \
1106 struct device_attribute *attr, \
1107 const char *buf, size_t count) \
a53eb5e0 1108{ \
ee959b00 1109 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1110 struct Scsi_Host *shost = vport_to_shost(vport); \
1111 struct fc_internal *i = to_fc_internal(shost->transportt); \
1112 unsigned int cnt=count; \
1113 \
1114 /* count may include a LF at end of string */ \
1115 if (buf[cnt-1] == '\n') \
1116 cnt--; \
1117 if (cnt > ((slen) - 1)) \
1118 return -EINVAL; \
1119 memcpy(vport->field, buf, cnt); \
1120 i->f->set_vport_##field(vport); \
1121 return count; \
1122}
1123
1124#define fc_vport_rd_attr(field, format_string, sz) \
1125 fc_vport_show_function(field, format_string, sz, ) \
ee959b00 1126static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1127 show_fc_vport_##field, NULL)
1128
1129#define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1130 fc_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1131static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1132 show_fc_vport_##field, NULL)
1133
1134#define fc_vport_rw_attr(field, format_string, sz) \
1135 fc_vport_show_function(field, format_string, sz, ) \
1136 fc_vport_store_function(field) \
ee959b00 1137static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1138 show_fc_vport_##field, \
1139 store_fc_vport_##field)
1140
1141#define fc_private_vport_show_function(field, format_string, sz, cast) \
1142static ssize_t \
ee959b00
TJ		 1143show_fc_vport_##field (struct device *dev, \
1144 struct device_attribute *attr, char *buf) \
a53eb5e0 1145{ \
ee959b00 1146 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1147 return snprintf(buf, sz, format_string, cast vport->field); \
1148}
1149
1150#define fc_private_vport_store_u32_function(field) \
1151static ssize_t \
ee959b00
TJ		 1152store_fc_vport_##field(struct device *dev, \
1153 struct device_attribute *attr, \
1154 const char *buf, size_t count) \
a53eb5e0
JS		 1155{ \
1156 u32 val; \
ee959b00 1157 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1158 char *cp; \
1159 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1160 return -EBUSY; \
1161 val = simple_strtoul(buf, &cp, 0); \
1162 if (*cp && (*cp != '\n')) \
1163 return -EINVAL; \
1164 vport->field = val; \
1165 return count; \
1166}
1167
1168
1169#define fc_private_vport_rd_attr(field, format_string, sz) \
1170 fc_private_vport_show_function(field, format_string, sz, ) \
ee959b00 1171static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1172 show_fc_vport_##field, NULL)
1173
1174#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1175 fc_private_vport_show_function(field, format_string, sz, (cast)) \
ee959b00 1176static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
a53eb5e0
JS		 1177 show_fc_vport_##field, NULL)
1178
1179#define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1180 fc_private_vport_show_function(field, format_string, sz, ) \
1181 fc_private_vport_store_u32_function(field) \
ee959b00 1182static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
a53eb5e0
JS		 1183 show_fc_vport_##field, \
1184 store_fc_vport_##field)
1185
1186
1187#define fc_private_vport_rd_enum_attr(title, maxlen) \
1188static ssize_t \
ee959b00
TJ		 1189show_fc_vport_##title (struct device *dev, \
1190 struct device_attribute *attr, \
1191 char *buf) \
a53eb5e0 1192{ \
ee959b00 1193 struct fc_vport *vport = transport_class_to_vport(dev); \
a53eb5e0
JS		 1194 const char *name; \
1195 name = get_fc_##title##_name(vport->title); \
1196 if (!name) \
1197 return -EINVAL; \
1198 return snprintf(buf, maxlen, "%s\n", name); \
1199} \
ee959b00 1200static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
a53eb5e0
JS		 1201 show_fc_vport_##title, NULL)
1202
1203
1204#define SETUP_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1205 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1206 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1207 i->private_vport_attrs[count].store = NULL; \
1208 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1209 if (i->f->get_##field) \
1210 count++
1211 /* NOTE: Above MACRO differs: checks function not show bit */
1212
1213#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
ee959b00 1214 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1215 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1216 i->private_vport_attrs[count].store = NULL; \
1217 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1218 count++
1219
1220#define SETUP_VPORT_ATTRIBUTE_WR(field) \
ee959b00 1221 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1222 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1223 if (i->f->field) \
1224 count++
1225 /* NOTE: Above MACRO differs: checks function */
1226
1227#define SETUP_VPORT_ATTRIBUTE_RW(field) \
ee959b00 1228 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1229 if (!i->f->set_vport_##field) { \
1230 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1231 i->private_vport_attrs[count].store = NULL; \
1232 } \
1233 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1234 count++
1235 /* NOTE: Above MACRO differs: does not check show bit */
1236
1237#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1238{ \
ee959b00 1239 i->private_vport_attrs[count] = device_attr_vport_##field; \
a53eb5e0
JS		 1240 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1241 count++; \
1242}
1243
1244
1245/* The FC Transport Virtual Port Attributes: */
1246
1247/* Fixed Virtual Port Attributes */
1248
1249/* Dynamic Virtual Port Attributes */
1250
1251/* Private Virtual Port Attributes */
1252
1253fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1254fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1255fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1256fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1257
1258static ssize_t
ee959b00
TJ		 1259show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1260 char *buf)
a53eb5e0 1261{
ee959b00 1262 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1263
1264 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1265 return snprintf(buf, 20, "unknown\n");
1266 return get_fc_port_roles_names(vport->roles, buf);
1267}
ee959b00 1268static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
a53eb5e0
JS		 1269
1270fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1271
1272fc_private_vport_show_function(symbolic_name, "%s\n",
1273 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1274fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
ee959b00 1275static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
a53eb5e0
JS		 1276 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1277
1278static ssize_t
ee959b00
TJ		 1279store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1280 const char *buf, size_t count)
a53eb5e0 1281{
ee959b00 1282 struct fc_vport *vport = transport_class_to_vport(dev);
9ef3e4a4 1283 struct Scsi_Host *shost = vport_to_shost(vport);
0d9dc7c8
GR		 1284 unsigned long flags;
1285
1286 spin_lock_irqsave(shost->host_lock, flags);
1287 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1288 spin_unlock_irqrestore(shost->host_lock, flags);
1289 return -EBUSY;
1290 }
1291 vport->flags |= FC_VPORT_DELETING;
1292 spin_unlock_irqrestore(shost->host_lock, flags);
a53eb5e0 1293
9ef3e4a4 1294 fc_queue_work(shost, &vport->vport_delete_work);
a53eb5e0
JS		 1295 return count;
1296}
ee959b00 1297static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
a53eb5e0
JS		 1298 NULL, store_fc_vport_delete);
1299
1300
1301/*
1302 * Enable/Disable vport
1303 * Write "1" to disable, write "0" to enable
1304 */
1305static ssize_t
ee959b00
TJ		 1306store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1307 const char *buf,
a53eb5e0
JS		 1308 size_t count)
1309{
ee959b00 1310 struct fc_vport *vport = transport_class_to_vport(dev);
a53eb5e0
JS		 1311 struct Scsi_Host *shost = vport_to_shost(vport);
1312 struct fc_internal *i = to_fc_internal(shost->transportt);
1313 int stat;
1314
1315 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1316 return -EBUSY;
1317
1318 if (*buf == '0') {
1319 if (vport->vport_state != FC_VPORT_DISABLED)
1320 return -EALREADY;
1321 } else if (*buf == '1') {
1322 if (vport->vport_state == FC_VPORT_DISABLED)
1323 return -EALREADY;
1324 } else
1325 return -EINVAL;
1326
1327 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1328 return stat ? stat : count;
1329}
ee959b00 1330static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
a53eb5e0
JS		 1331 NULL, store_fc_vport_disable);
1332
1333
1da177e4
LT		 1334/*
1335 * Host Attribute Management
1336 */
1337
1338#define fc_host_show_function(field, format_string, sz, cast) \
1339static ssize_t \
ee959b00
TJ		 1340show_fc_host_##field (struct device *dev, \
1341 struct device_attribute *attr, char *buf) \
1da177e4 1342{ \
ee959b00 1343 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1344 struct fc_internal *i = to_fc_internal(shost->transportt); \
1345 if (i->f->get_host_##field) \
1346 i->f->get_host_##field(shost); \
1347 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1348}
1349
1350#define fc_host_store_function(field) \
1351static ssize_t \
ee959b00
TJ		 1352store_fc_host_##field(struct device *dev, \
1353 struct device_attribute *attr, \
1354 const char *buf, size_t count) \
1da177e4
LT		 1355{ \
1356 int val; \
ee959b00 1357 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4 1358 struct fc_internal *i = to_fc_internal(shost->transportt); \
0f29b966 1359 char *cp; \
1da177e4 1360 \
0f29b966
JS		 1361 val = simple_strtoul(buf, &cp, 0); \
1362 if (*cp && (*cp != '\n')) \
1363 return -EINVAL; \
1da177e4
LT		 1364 i->f->set_host_##field(shost, val); \
1365 return count; \
1366}
1367
b8d08210
JS		 1368#define fc_host_store_str_function(field, slen) \
1369static ssize_t \
ee959b00
TJ		 1370store_fc_host_##field(struct device *dev, \
1371 struct device_attribute *attr, \
1372 const char *buf, size_t count) \
b8d08210 1373{ \
ee959b00 1374 struct Scsi_Host *shost = transport_class_to_shost(dev); \
b8d08210
JS		 1375 struct fc_internal *i = to_fc_internal(shost->transportt); \
1376 unsigned int cnt=count; \
1377 \
1378 /* count may include a LF at end of string */ \
1379 if (buf[cnt-1] == '\n') \
1380 cnt--; \
1381 if (cnt > ((slen) - 1)) \
1382 return -EINVAL; \
1383 memcpy(fc_host_##field(shost), buf, cnt); \
1384 i->f->set_host_##field(shost); \
1385 return count; \
1386}
1387
1da177e4
LT		 1388#define fc_host_rd_attr(field, format_string, sz) \
1389 fc_host_show_function(field, format_string, sz, ) \
ee959b00 1390static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1391 show_fc_host_##field, NULL)
1392
1393#define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1394 fc_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1395static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1396 show_fc_host_##field, NULL)
1397
1398#define fc_host_rw_attr(field, format_string, sz) \
1399 fc_host_show_function(field, format_string, sz, ) \
1400 fc_host_store_function(field) \
ee959b00 1401static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1da177e4
LT		 1402 show_fc_host_##field, \
1403 store_fc_host_##field)
1404
1405#define fc_host_rd_enum_attr(title, maxlen) \
1406static ssize_t \
ee959b00
TJ		 1407show_fc_host_##title (struct device *dev, \
1408 struct device_attribute *attr, char *buf) \
1da177e4 1409{ \
ee959b00 1410 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1411 struct fc_internal *i = to_fc_internal(shost->transportt); \
1412 const char *name; \
1413 if (i->f->get_host_##title) \
1414 i->f->get_host_##title(shost); \
1415 name = get_fc_##title##_name(fc_host_##title(shost)); \
1416 if (!name) \
1417 return -EINVAL; \
1418 return snprintf(buf, maxlen, "%s\n", name); \
1419} \
ee959b00 1420static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1da177e4
LT		 1421
1422#define SETUP_HOST_ATTRIBUTE_RD(field) \
ee959b00 1423 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1424 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1425 i->private_host_attrs[count].store = NULL; \
1426 i->host_attrs[count] = &i->private_host_attrs[count]; \
1427 if (i->f->show_host_##field) \
1428 count++
1429
a53eb5e0 1430#define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
ee959b00 1431 i->private_host_attrs[count] = device_attr_host_##field; \
a53eb5e0
JS		 1432 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1433 i->private_host_attrs[count].store = NULL; \
1434 i->host_attrs[count] = &i->private_host_attrs[count]; \
1435 count++
1436
1da177e4 1437#define SETUP_HOST_ATTRIBUTE_RW(field) \
ee959b00 1438 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1439 if (!i->f->set_host_##field) { \
1440 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1441 i->private_host_attrs[count].store = NULL; \
1442 } \
1443 i->host_attrs[count] = &i->private_host_attrs[count]; \
1444 if (i->f->show_host_##field) \
1445 count++
1446
1447
1448#define fc_private_host_show_function(field, format_string, sz, cast) \
1449static ssize_t \
ee959b00
TJ		 1450show_fc_host_##field (struct device *dev, \
1451 struct device_attribute *attr, char *buf) \
1da177e4 1452{ \
ee959b00 1453 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1da177e4
LT		 1454 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1455}
1456
1457#define fc_private_host_rd_attr(field, format_string, sz) \
1458 fc_private_host_show_function(field, format_string, sz, ) \
ee959b00 1459static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1460 show_fc_host_##field, NULL)
1461
1462#define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1463 fc_private_host_show_function(field, format_string, sz, (cast)) \
ee959b00 1464static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1da177e4
LT		 1465 show_fc_host_##field, NULL)
1466
1467#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
ee959b00 1468 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4
LT		 1469 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1470 i->private_host_attrs[count].store = NULL; \
1471 i->host_attrs[count] = &i->private_host_attrs[count]; \
1472 count++
1473
1474#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
91ca7b01 1475{ \
ee959b00 1476 i->private_host_attrs[count] = device_attr_host_##field; \
1da177e4 1477 i->host_attrs[count] = &i->private_host_attrs[count]; \
91ca7b01
AV		 1478 count++; \
1479}
1da177e4
LT		 1480
1481
1482/* Fixed Host Attributes */
1483
1484static ssize_t
ee959b00
TJ		 1485show_fc_host_supported_classes (struct device *dev,
1486 struct device_attribute *attr, char *buf)
1da177e4 1487{
ee959b00 1488 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1489
1490 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1491 return snprintf(buf, 20, "unspecified\n");
1492
1493 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1494}
ee959b00 1495static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1da177e4
LT		 1496 show_fc_host_supported_classes, NULL);
1497
1498static ssize_t
ee959b00
TJ		 1499show_fc_host_supported_fc4s (struct device *dev,
1500 struct device_attribute *attr, char *buf)
1da177e4 1501{
ee959b00 1502 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1503 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1504}
ee959b00 1505static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1da177e4
LT		 1506 show_fc_host_supported_fc4s, NULL);
1507
1508static ssize_t
ee959b00
TJ		 1509show_fc_host_supported_speeds (struct device *dev,
1510 struct device_attribute *attr, char *buf)
1da177e4 1511{
ee959b00 1512 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1513
1514 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1515 return snprintf(buf, 20, "unknown\n");
1516
1517 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1518}
ee959b00 1519static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1da177e4
LT		 1520 show_fc_host_supported_speeds, NULL);
1521
1522
1523fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1524fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
6b7281d0
AH		 1525fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1526 unsigned long long);
1da177e4 1527fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
a53eb5e0 1528fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1da177e4 1529fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
bb8ef587
NP		 1530fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1531fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1532fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1533fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1534fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1535fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1536fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1da177e4
LT		 1537
1538
1539/* Dynamic Host Attributes */
1540
1541static ssize_t
ee959b00
TJ		 1542show_fc_host_active_fc4s (struct device *dev,
1543 struct device_attribute *attr, char *buf)
1da177e4 1544{
ee959b00 1545 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1546 struct fc_internal *i = to_fc_internal(shost->transportt);
1547
1548 if (i->f->get_host_active_fc4s)
1549 i->f->get_host_active_fc4s(shost);
1550
1551 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1552}
ee959b00 1553static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1da177e4
LT		 1554 show_fc_host_active_fc4s, NULL);
1555
1556static ssize_t
ee959b00
TJ		 1557show_fc_host_speed (struct device *dev,
1558 struct device_attribute *attr, char *buf)
1da177e4 1559{
ee959b00 1560 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1561 struct fc_internal *i = to_fc_internal(shost->transportt);
1562
1563 if (i->f->get_host_speed)
1564 i->f->get_host_speed(shost);
1565
1566 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1567 return snprintf(buf, 20, "unknown\n");
1568
1569 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1570}
ee959b00 1571static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1da177e4
LT		 1572 show_fc_host_speed, NULL);
1573
1574
1575fc_host_rd_attr(port_id, "0x%06x\n", 20);
1576fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1577fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1578fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
016131b8 1579fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1da177e4 1580
b8d08210
JS		 1581fc_private_host_show_function(system_hostname, "%s\n",
1582 FC_SYMBOLIC_NAME_SIZE + 1, )
1583fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
ee959b00 1584static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
b8d08210
JS		 1585 show_fc_host_system_hostname, store_fc_host_system_hostname);
1586
1da177e4
LT		 1587
1588/* Private Host Attributes */
1589
1590static ssize_t
ee959b00
TJ		 1591show_fc_private_host_tgtid_bind_type(struct device *dev,
1592 struct device_attribute *attr, char *buf)
1da177e4 1593{
ee959b00 1594 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1595 const char *name;
1596
1597 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1598 if (!name)
1599 return -EINVAL;
1600 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1601}
1602
d16794f6
JSEC		 1603#define get_list_head_entry(pos, head, member) \
1604 pos = list_entry((head)->next, typeof(*pos), member)
1605
1da177e4 1606static ssize_t
ee959b00
TJ		 1607store_fc_private_host_tgtid_bind_type(struct device *dev,
1608 struct device_attribute *attr, const char *buf, size_t count)
1da177e4 1609{
ee959b00 1610 struct Scsi_Host *shost = transport_class_to_shost(dev);
d16794f6 1611 struct fc_rport *rport;
1da177e4
LT		 1612 enum fc_tgtid_binding_type val;
1613 unsigned long flags;
1614
1615 if (get_fc_tgtid_bind_type_match(buf, &val))
1616 return -EINVAL;
1617
1618 /* if changing bind type, purge all unused consistent bindings */
1619 if (val != fc_host_tgtid_bind_type(shost)) {
1620 spin_lock_irqsave(shost->host_lock, flags);
d16794f6
JSEC		 1621 while (!list_empty(&fc_host_rport_bindings(shost))) {
1622 get_list_head_entry(rport,
1623 &fc_host_rport_bindings(shost), peers);
aedf3497
JS		 1624 list_del(&rport->peers);
1625 rport->port_state = FC_PORTSTATE_DELETED;
1626 fc_queue_work(shost, &rport->rport_delete_work);
d16794f6 1627 }
1da177e4
LT		 1628 spin_unlock_irqrestore(shost->host_lock, flags);
1629 }
1630
1631 fc_host_tgtid_bind_type(shost) = val;
1632 return count;
1633}
1634
ee959b00 1635static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1da177e4
LT		 1636 show_fc_private_host_tgtid_bind_type,
1637 store_fc_private_host_tgtid_bind_type);
1638
91ca7b01 1639static ssize_t
ee959b00
TJ		 1640store_fc_private_host_issue_lip(struct device *dev,
1641 struct device_attribute *attr, const char *buf, size_t count)
91ca7b01 1642{
ee959b00 1643 struct Scsi_Host *shost = transport_class_to_shost(dev);
91ca7b01
AV		 1644 struct fc_internal *i = to_fc_internal(shost->transportt);
1645 int ret;
1646
1647 /* ignore any data value written to the attribute */
1648 if (i->f->issue_fc_host_lip) {
1649 ret = i->f->issue_fc_host_lip(shost);
1650 return ret ? ret: count;
1651 }
1652
1653 return -ENOENT;
1654}
1655
ee959b00 1656static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
91ca7b01
AV		 1657 store_fc_private_host_issue_lip);
1658
43ca910a
MC		 1659static ssize_t
1660store_fc_private_host_dev_loss_tmo(struct device *dev,
1661 struct device_attribute *attr,
1662 const char *buf, size_t count)
1663{
1664 struct Scsi_Host *shost = transport_class_to_shost(dev);
1665 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1666 struct fc_rport *rport;
1667 unsigned long val, flags;
1668 int rc;
1669
1670 rc = fc_str_to_dev_loss(buf, &val);
1671 if (rc)
1672 return rc;
1673
1674 fc_host_dev_loss_tmo(shost) = val;
1675 spin_lock_irqsave(shost->host_lock, flags);
1676 list_for_each_entry(rport, &fc_host->rports, peers)
1677 fc_rport_set_dev_loss_tmo(rport, val);
1678 spin_unlock_irqrestore(shost->host_lock, flags);
1679 return count;
1680}
a53eb5e0 1681
43ca910a
MC		 1682fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1683static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1684 show_fc_host_dev_loss_tmo,
1685 store_fc_private_host_dev_loss_tmo);
1686
1687fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
a53eb5e0 1688
1da177e4
LT		 1689/*
1690 * Host Statistics Management
1691 */
1692
1693/* Show a given an attribute in the statistics group */
1694static ssize_t
ee959b00 1695fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1da177e4 1696{
ee959b00 1697 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1698 struct fc_internal *i = to_fc_internal(shost->transportt);
1699 struct fc_host_statistics *stats;
1700 ssize_t ret = -ENOENT;
1701
1702 if (offset > sizeof(struct fc_host_statistics) ||
1703 offset % sizeof(u64) != 0)
1704 WARN_ON(1);
1705
1706 if (i->f->get_fc_host_stats) {
1707 stats = (i->f->get_fc_host_stats)(shost);
1708 if (stats)
1709 ret = snprintf(buf, 20, "0x%llx\n",
1710 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1711 }
1712 return ret;
1713}
1714
1715
1716/* generate a read-only statistics attribute */
1717#define fc_host_statistic(name) \
ee959b00
TJ		 1718static ssize_t show_fcstat_##name(struct device *cd, \
1719 struct device_attribute *attr, \
1720 char *buf) \
1da177e4
LT		 1721{ \
1722 return fc_stat_show(cd, buf, \
1723 offsetof(struct fc_host_statistics, name)); \
1724} \
ee959b00 1725static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1da177e4
LT		 1726
1727fc_host_statistic(seconds_since_last_reset);
1728fc_host_statistic(tx_frames);
1729fc_host_statistic(tx_words);
1730fc_host_statistic(rx_frames);
1731fc_host_statistic(rx_words);
1732fc_host_statistic(lip_count);
1733fc_host_statistic(nos_count);
1734fc_host_statistic(error_frames);
1735fc_host_statistic(dumped_frames);
1736fc_host_statistic(link_failure_count);
1737fc_host_statistic(loss_of_sync_count);
1738fc_host_statistic(loss_of_signal_count);
1739fc_host_statistic(prim_seq_protocol_err_count);
1740fc_host_statistic(invalid_tx_word_count);
1741fc_host_statistic(invalid_crc_count);
1742fc_host_statistic(fcp_input_requests);
1743fc_host_statistic(fcp_output_requests);
1744fc_host_statistic(fcp_control_requests);
1745fc_host_statistic(fcp_input_megabytes);
1746fc_host_statistic(fcp_output_megabytes);
e58abb0c
VD		 1747fc_host_statistic(fcp_packet_alloc_failures);
1748fc_host_statistic(fcp_packet_aborts);
1749fc_host_statistic(fcp_frame_alloc_failures);
1750fc_host_statistic(fc_no_free_exch);
1751fc_host_statistic(fc_no_free_exch_xid);
1752fc_host_statistic(fc_xid_not_found);
1753fc_host_statistic(fc_xid_busy);
1754fc_host_statistic(fc_seq_not_found);
1755fc_host_statistic(fc_non_bls_resp);
1da177e4
LT		 1756
1757static ssize_t
ee959b00
TJ		 1758fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1759 const char *buf, size_t count)
1da177e4 1760{
ee959b00 1761 struct Scsi_Host *shost = transport_class_to_shost(dev);
1da177e4
LT		 1762 struct fc_internal *i = to_fc_internal(shost->transportt);
1763
1764 /* ignore any data value written to the attribute */
1765 if (i->f->reset_fc_host_stats) {
1766 i->f->reset_fc_host_stats(shost);
1767 return count;
1768 }
1769
1770 return -ENOENT;
1771}
ee959b00 1772static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1da177e4
LT		 1773 fc_reset_statistics);
1774
1da177e4 1775static struct attribute *fc_statistics_attrs[] = {
ee959b00
TJ		 1776 &device_attr_host_seconds_since_last_reset.attr,
1777 &device_attr_host_tx_frames.attr,
1778 &device_attr_host_tx_words.attr,
1779 &device_attr_host_rx_frames.attr,
1780 &device_attr_host_rx_words.attr,
1781 &device_attr_host_lip_count.attr,
1782 &device_attr_host_nos_count.attr,
1783 &device_attr_host_error_frames.attr,
1784 &device_attr_host_dumped_frames.attr,
1785 &device_attr_host_link_failure_count.attr,
1786 &device_attr_host_loss_of_sync_count.attr,
1787 &device_attr_host_loss_of_signal_count.attr,
1788 &device_attr_host_prim_seq_protocol_err_count.attr,
1789 &device_attr_host_invalid_tx_word_count.attr,
1790 &device_attr_host_invalid_crc_count.attr,
1791 &device_attr_host_fcp_input_requests.attr,
1792 &device_attr_host_fcp_output_requests.attr,
1793 &device_attr_host_fcp_control_requests.attr,
1794 &device_attr_host_fcp_input_megabytes.attr,
1795 &device_attr_host_fcp_output_megabytes.attr,
e58abb0c
VD		 1796 &device_attr_host_fcp_packet_alloc_failures.attr,
1797 &device_attr_host_fcp_packet_aborts.attr,
1798 &device_attr_host_fcp_frame_alloc_failures.attr,
1799 &device_attr_host_fc_no_free_exch.attr,
1800 &device_attr_host_fc_no_free_exch_xid.attr,
1801 &device_attr_host_fc_xid_not_found.attr,
1802 &device_attr_host_fc_xid_busy.attr,
1803 &device_attr_host_fc_seq_not_found.attr,
1804 &device_attr_host_fc_non_bls_resp.attr,
ee959b00 1805 &device_attr_host_reset_statistics.attr,
1da177e4
LT		 1806 NULL
1807};
1808
1809static struct attribute_group fc_statistics_group = {
1810 .name = "statistics",
1811 .attrs = fc_statistics_attrs,
1812};
1813
a53eb5e0
JS		 1814
1815/* Host Vport Attributes */
1816
1817static int
1818fc_parse_wwn(const char *ns, u64 *nm)
1819{
1820 unsigned int i, j;
1821 u8 wwn[8];
1822
1823 memset(wwn, 0, sizeof(wwn));
1824
1825 /* Validate and store the new name */
1826 for (i=0, j=0; i < 16; i++) {
ecc30990
AS		 1827 int value;
1828
1829 value = hex_to_bin(*ns++);
1830 if (value >= 0)
1831 j = (j << 4) | value;
a53eb5e0
JS		 1832 else
1833 return -EINVAL;
1834 if (i % 2) {
1835 wwn[i/2] = j & 0xff;
1836 j = 0;
1837 }
1838 }
1839
1840 *nm = wwn_to_u64(wwn);
1841
1842 return 0;
1843}
1844
1845
1846/*
1847 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1848 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1849 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1850 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1851 */
1852static ssize_t
ee959b00
TJ		 1853store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1854 const char *buf, size_t count)
a53eb5e0 1855{
ee959b00 1856 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1857 struct fc_vport_identifiers vid;
1858 struct fc_vport *vport;
1859 unsigned int cnt=count;
1860 int stat;
1861
1862 memset(&vid, 0, sizeof(vid));
1863
1864 /* count may include a LF at end of string */
1865 if (buf[cnt-1] == '\n')
1866 cnt--;
1867
1868 /* validate we have enough characters for WWPN */
1869 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1870 return -EINVAL;
1871
1872 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1873 if (stat)
1874 return stat;
1875
1876 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1877 if (stat)
1878 return stat;
1879
1880 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1881 vid.vport_type = FC_PORTTYPE_NPIV;
1882 /* vid.symbolic_name is already zero/NULL's */
1883 vid.disable = false; /* always enabled */
1884
1885 /* we only allow support on Channel 0 !!! */
a30c3f69 1886 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
a53eb5e0
JS		 1887 return stat ? stat : count;
1888}
ee959b00 1889static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
a53eb5e0
JS		 1890 store_fc_host_vport_create);
1891
1892
1893/*
1894 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1895 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1896 * The WWNs are specified as hex characters, and may *not* contain
1897 * any prefixes (e.g. 0x, x, etc)
1898 */
1899static ssize_t
ee959b00
TJ		 1900store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1901 const char *buf, size_t count)
a53eb5e0 1902{
ee959b00 1903 struct Scsi_Host *shost = transport_class_to_shost(dev);
a53eb5e0
JS		 1904 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1905 struct fc_vport *vport;
1906 u64 wwpn, wwnn;
1907 unsigned long flags;
1908 unsigned int cnt=count;
1909 int stat, match;
1910
1911 /* count may include a LF at end of string */
1912 if (buf[cnt-1] == '\n')
1913 cnt--;
1914
1915 /* validate we have enough characters for WWPN */
1916 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1917 return -EINVAL;
1918
1919 stat = fc_parse_wwn(&buf[0], &wwpn);
1920 if (stat)
1921 return stat;
1922
1923 stat = fc_parse_wwn(&buf[17], &wwnn);
1924 if (stat)
1925 return stat;
1926
1927 spin_lock_irqsave(shost->host_lock, flags);
1928 match = 0;
1929 /* we only allow support on Channel 0 !!! */
1930 list_for_each_entry(vport, &fc_host->vports, peers) {
1931 if ((vport->channel == 0) &&
1932 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
0d9dc7c8
GR		 1933 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1934 break;
1935 vport->flags |= FC_VPORT_DELETING;
a53eb5e0
JS		 1936 match = 1;
1937 break;
1938 }
1939 }
1940 spin_unlock_irqrestore(shost->host_lock, flags);
1941
1942 if (!match)
1943 return -ENODEV;
1944
1945 stat = fc_vport_terminate(vport);
1946 return stat ? stat : count;
1947}
ee959b00 1948static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
a53eb5e0
JS		 1949 store_fc_host_vport_delete);
1950
1951
1da177e4
LT		 1952static int fc_host_match(struct attribute_container *cont,
1953 struct device *dev)
1954{
1955 struct Scsi_Host *shost;
1956 struct fc_internal *i;
1957
1958 if (!scsi_is_host_device(dev))
1959 return 0;
1960
1961 shost = dev_to_shost(dev);
1962 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1963 != &fc_host_class.class)
1964 return 0;
1965
1966 i = to_fc_internal(shost->transportt);
1967
1968 return &i->t.host_attrs.ac == cont;
1969}
1970
1971static int fc_target_match(struct attribute_container *cont,
1972 struct device *dev)
1973{
1974 struct Scsi_Host *shost;
1975 struct fc_internal *i;
1976
1977 if (!scsi_is_target_device(dev))
1978 return 0;
1979
1980 shost = dev_to_shost(dev->parent);
1981 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1982 != &fc_host_class.class)
1983 return 0;
1984
1985 i = to_fc_internal(shost->transportt);
1986
1987 return &i->t.target_attrs.ac == cont;
1988}
1989
1990static void fc_rport_dev_release(struct device *dev)
1991{
1992 struct fc_rport *rport = dev_to_rport(dev);
1993 put_device(dev->parent);
1994 kfree(rport);
1995}
1996
1997int scsi_is_fc_rport(const struct device *dev)
1998{
1999 return dev->release == fc_rport_dev_release;
2000}
2001EXPORT_SYMBOL(scsi_is_fc_rport);
2002
2003static int fc_rport_match(struct attribute_container *cont,
2004 struct device *dev)
2005{
2006 struct Scsi_Host *shost;
2007 struct fc_internal *i;
2008
2009 if (!scsi_is_fc_rport(dev))
2010 return 0;
2011
2012 shost = dev_to_shost(dev->parent);
2013 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2014 != &fc_host_class.class)
2015 return 0;
2016
2017 i = to_fc_internal(shost->transportt);
2018
2019 return &i->rport_attr_cont.ac == cont;
2020}
2021
5c44cd2a 2022
a53eb5e0
JS		 2023static void fc_vport_dev_release(struct device *dev)
2024{
2025 struct fc_vport *vport = dev_to_vport(dev);
2026 put_device(dev->parent); /* release kobj parent */
2027 kfree(vport);
2028}
2029
2030int scsi_is_fc_vport(const struct device *dev)
2031{
2032 return dev->release == fc_vport_dev_release;
2033}
2034EXPORT_SYMBOL(scsi_is_fc_vport);
2035
2036static int fc_vport_match(struct attribute_container *cont,
2037 struct device *dev)
2038{
2039 struct fc_vport *vport;
2040 struct Scsi_Host *shost;
2041 struct fc_internal *i;
2042
2043 if (!scsi_is_fc_vport(dev))
2044 return 0;
2045 vport = dev_to_vport(dev);
2046
2047 shost = vport_to_shost(vport);
2048 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2049 != &fc_host_class.class)
2050 return 0;
2051
2052 i = to_fc_internal(shost->transportt);
2053 return &i->vport_attr_cont.ac == cont;
2054}
2055
2056
c829c394
JS		 2057/**
2058 * fc_timed_out - FC Transport I/O timeout intercept handler
c829c394
JS		 2059 * @scmd: The SCSI command which timed out
2060 *
2061 * This routine protects against error handlers getting invoked while a
2062 * rport is in a blocked state, typically due to a temporarily loss of
2063 * connectivity. If the error handlers are allowed to proceed, requests
2064 * to abort i/o, reset the target, etc will likely fail as there is no way
2065 * to communicate with the device to perform the requested function. These
2066 * failures may result in the midlayer taking the device offline, requiring
2067 * manual intervention to restore operation.
2068 *
2069 * This routine, called whenever an i/o times out, validates the state of
2070 * the underlying rport. If the rport is blocked, it returns
2071 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2072 * Eventually, either the device will return, or devloss_tmo will fire,
2073 * and when the timeout then fires, it will be handled normally.
2074 * If the rport is not blocked, normal error handling continues.
2075 *
2076 * Notes:
2077 * This routine assumes no locks are held on entry.
eb44820c 2078 */
242f9dcb 2079static enum blk_eh_timer_return
c829c394
JS		 2080fc_timed_out(struct scsi_cmnd *scmd)
2081{
2082 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2083
2084 if (rport->port_state == FC_PORTSTATE_BLOCKED)
242f9dcb 2085 return BLK_EH_RESET_TIMER;
c829c394 2086
242f9dcb 2087 return BLK_EH_NOT_HANDLED;
c829c394
JS		 2088}
2089
5c44cd2a 2090/*
bda23253
JS		 2091 * Called by fc_user_scan to locate an rport on the shost that
2092 * matches the channel and target id, and invoke scsi_scan_target()
2093 * on the rport.
5c44cd2a 2094 */
bda23253 2095static void
9cb78c16 2096fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
5c44cd2a
JSEC		 2097{
2098 struct fc_rport *rport;
bda23253
JS		 2099 unsigned long flags;
2100
2101 spin_lock_irqsave(shost->host_lock, flags);
5c44cd2a 2102
e02f3f59
CH		 2103 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2104 if (rport->scsi_target_id == -1)
2105 continue;
5c44cd2a 2106
0d2fcd9f
HR		 2107 if (rport->port_state != FC_PORTSTATE_ONLINE)
2108 continue;
2109
bda23253
JS		 2110 if ((channel == rport->channel) &&
2111 (id == rport->scsi_target_id)) {
2112 spin_unlock_irqrestore(shost->host_lock, flags);
1d645088
HR		 2113 scsi_scan_target(&rport->dev, channel, id, lun,
2114 SCSI_SCAN_MANUAL);
bda23253 2115 return;
e02f3f59
CH		 2116 }
2117 }
2118
bda23253
JS		 2119 spin_unlock_irqrestore(shost->host_lock, flags);
2120}
2121
2122/*
2123 * Called via sysfs scan routines. Necessary, as the FC transport
2124 * wants to place all target objects below the rport object. So this
2125 * routine must invoke the scsi_scan_target() routine with the rport
2126 * object as the parent.
2127 */
2128static int
9cb78c16 2129fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
bda23253
JS		 2130{
2131 uint chlo, chhi;
2132 uint tgtlo, tgthi;
2133
2134 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2135 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2136 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2137 return -EINVAL;
2138
2139 if (channel == SCAN_WILD_CARD) {
2140 chlo = 0;
2141 chhi = shost->max_channel + 1;
2142 } else {
2143 chlo = channel;
2144 chhi = channel + 1;
2145 }
2146
2147 if (id == SCAN_WILD_CARD) {
2148 tgtlo = 0;
2149 tgthi = shost->max_id;
2150 } else {
2151 tgtlo = id;
2152 tgthi = id + 1;
2153 }
2154
2155 for ( ; chlo < chhi; chlo++)
2156 for ( ; tgtlo < tgthi; tgtlo++)
2157 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2158
e02f3f59 2159 return 0;
5c44cd2a
JSEC		 2160}
2161
7525236d
FT		 2162static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2163 int result)
2164{
2165 struct fc_internal *i = to_fc_internal(shost->transportt);
2166 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2167}
2168
2169static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2170{
2171 struct fc_internal *i = to_fc_internal(shost->transportt);
2172 return i->f->it_nexus_response(shost, nexus, result);
2173}
2174
1da177e4
LT		 2175struct scsi_transport_template *
2176fc_attach_transport(struct fc_function_template *ft)
2177{
1da177e4 2178 int count;
24669f75
JS		 2179 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2180 GFP_KERNEL);
1da177e4
LT		 2181
2182 if (unlikely(!i))
2183 return NULL;
2184
1da177e4
LT		 2185 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2186 i->t.target_attrs.ac.class = &fc_transport_class.class;
2187 i->t.target_attrs.ac.match = fc_target_match;
2188 i->t.target_size = sizeof(struct fc_starget_attrs);
2189 transport_container_register(&i->t.target_attrs);
2190
2191 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2192 i->t.host_attrs.ac.class = &fc_host_class.class;
2193 i->t.host_attrs.ac.match = fc_host_match;
2194 i->t.host_size = sizeof(struct fc_host_attrs);
2195 if (ft->get_fc_host_stats)
2196 i->t.host_attrs.statistics = &fc_statistics_group;
2197 transport_container_register(&i->t.host_attrs);
2198
2199 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2200 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2201 i->rport_attr_cont.ac.match = fc_rport_match;
2202 transport_container_register(&i->rport_attr_cont);
2203
a53eb5e0
JS		 2204 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2205 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2206 i->vport_attr_cont.ac.match = fc_vport_match;
2207 transport_container_register(&i->vport_attr_cont);
2208
1da177e4
LT		 2209 i->f = ft;
2210
2211 /* Transport uses the shost workq for scsi scanning */
2212 i->t.create_work_queue = 1;
5c44cd2a 2213
c829c394
JS		 2214 i->t.eh_timed_out = fc_timed_out;
2215
e02f3f59 2216 i->t.user_scan = fc_user_scan;
9ef3e4a4 2217
7525236d
FT		 2218 /* target-mode drivers' functions */
2219 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2220 i->t.it_nexus_response = fc_it_nexus_response;
2221
1da177e4
LT		 2222 /*
2223 * Setup SCSI Target Attributes.
2224 */
2225 count = 0;
2226 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2227 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2228 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2229
2230 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2231
2232 i->starget_attrs[count] = NULL;
2233
2234
2235 /*
2236 * Setup SCSI Host Attributes.
2237 */
2238 count=0;
2239 SETUP_HOST_ATTRIBUTE_RD(node_name);
2240 SETUP_HOST_ATTRIBUTE_RD(port_name);
6b7281d0 2241 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
1da177e4
LT		 2242 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2243 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1da177e4
LT		 2244 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2245 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
a53eb5e0
JS		 2246 if (ft->vport_create) {
2247 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2248 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2249 }
1da177e4 2250 SETUP_HOST_ATTRIBUTE_RD(serial_number);
bb8ef587
NP		 2251 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2252 SETUP_HOST_ATTRIBUTE_RD(model);
2253 SETUP_HOST_ATTRIBUTE_RD(model_description);
2254 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2255 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2256 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2257 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
1da177e4
LT		 2258
2259 SETUP_HOST_ATTRIBUTE_RD(port_id);
2260 SETUP_HOST_ATTRIBUTE_RD(port_type);
2261 SETUP_HOST_ATTRIBUTE_RD(port_state);
2262 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2263 SETUP_HOST_ATTRIBUTE_RD(speed);
2264 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
016131b8 2265 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
b8d08210 2266 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
1da177e4
LT		 2267
2268 /* Transport-managed attributes */
43ca910a 2269 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
1da177e4 2270 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
91ca7b01
AV		 2271 if (ft->issue_fc_host_lip)
2272 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
a53eb5e0
JS		 2273 if (ft->vport_create)
2274 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2275 if (ft->vport_delete)
2276 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
1da177e4
LT		 2277
2278 BUG_ON(count > FC_HOST_NUM_ATTRS);
2279
2280 i->host_attrs[count] = NULL;
2281
2282 /*
2283 * Setup Remote Port Attributes.
2284 */
2285 count=0;
2286 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2287 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2288 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2289 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2290 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2291 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2292 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2293 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2294 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
fff9d40c 2295 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
1da177e4
LT		 2296
2297 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2298
2299 i->rport_attrs[count] = NULL;
2300
a53eb5e0
JS		 2301 /*
2302 * Setup Virtual Port Attributes.
2303 */
2304 count=0;
2305 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2306 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2307 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2308 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2309 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2310 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2311 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2312 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2313 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2314
2315 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2316
2317 i->vport_attrs[count] = NULL;
2318
1da177e4
LT		 2319 return &i->t;
2320}
2321EXPORT_SYMBOL(fc_attach_transport);
2322
2323void fc_release_transport(struct scsi_transport_template *t)
2324{
2325 struct fc_internal *i = to_fc_internal(t);
2326
2327 transport_container_unregister(&i->t.target_attrs);
2328 transport_container_unregister(&i->t.host_attrs);
2329 transport_container_unregister(&i->rport_attr_cont);
a53eb5e0 2330 transport_container_unregister(&i->vport_attr_cont);
1da177e4
LT		 2331
2332 kfree(i);
2333}
2334EXPORT_SYMBOL(fc_release_transport);
2335
aedf3497
JS		 2336/**
2337 * fc_queue_work - Queue work to the fc_host workqueue.
2338 * @shost: Pointer to Scsi_Host bound to fc_host.
2339 * @work: Work to queue for execution.
2340 *
2341 * Return value:
a0785edf
JS		 2342 * 1 - work queued for execution
2343 * 0 - work is already queued
2344 * -EINVAL - work queue doesn't exist
eb44820c 2345 */
aedf3497
JS		 2346static int
2347fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2348{
2349 if (unlikely(!fc_host_work_q(shost))) {
2350 printk(KERN_ERR
2351 "ERROR: FC host '%s' attempted to queue work, "
2352 "when no workqueue created.\n", shost->hostt->name);
2353 dump_stack();
2354
2355 return -EINVAL;
2356 }
2357
2358 return queue_work(fc_host_work_q(shost), work);
2359}
2360
2361/**
2362 * fc_flush_work - Flush a fc_host's workqueue.
2363 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2364 */
aedf3497
JS		 2365static void
2366fc_flush_work(struct Scsi_Host *shost)
2367{
2368 if (!fc_host_work_q(shost)) {
2369 printk(KERN_ERR
2370 "ERROR: FC host '%s' attempted to flush work, "
2371 "when no workqueue created.\n", shost->hostt->name);
2372 dump_stack();
2373 return;
2374 }
2375
2376 flush_workqueue(fc_host_work_q(shost));
2377}
2378
2379/**
2380 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2381 * @shost: Pointer to Scsi_Host bound to fc_host.
2382 * @work: Work to queue for execution.
2383 * @delay: jiffies to delay the work queuing
2384 *
2385 * Return value:
0f29b966 2386 * 1 on success / 0 already queued / < 0 for error
eb44820c 2387 */
aedf3497 2388static int
c4028958 2389fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
aedf3497
JS		 2390 unsigned long delay)
2391{
2392 if (unlikely(!fc_host_devloss_work_q(shost))) {
2393 printk(KERN_ERR
2394 "ERROR: FC host '%s' attempted to queue work, "
2395 "when no workqueue created.\n", shost->hostt->name);
2396 dump_stack();
2397
2398 return -EINVAL;
2399 }
2400
2401 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2402}
2403
2404/**
2405 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2406 * @shost: Pointer to Scsi_Host bound to fc_host.
eb44820c 2407 */
aedf3497
JS		 2408static void
2409fc_flush_devloss(struct Scsi_Host *shost)
2410{
2411 if (!fc_host_devloss_work_q(shost)) {
2412 printk(KERN_ERR
2413 "ERROR: FC host '%s' attempted to flush work, "
2414 "when no workqueue created.\n", shost->hostt->name);
2415 dump_stack();
2416 return;
2417 }
2418
2419 flush_workqueue(fc_host_devloss_work_q(shost));
2420}
2421
1da177e4
LT		 2422
2423/**
eb44820c
RL		 2424 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2425 * @shost: Which &Scsi_Host
1da177e4 2426 *
25985edc 2427 * This routine is expected to be called immediately preceding the
1da177e4
LT		 2428 * a driver's call to scsi_remove_host().
2429 *
2430 * WARNING: A driver utilizing the fc_transport, which fails to call
eb44820c 2431 * this routine prior to scsi_remove_host(), will leave dangling
1da177e4
LT		 2432 * objects in /sys/class/fc_remote_ports. Access to any of these
2433 * objects can result in a system crash !!!
2434 *
2435 * Notes:
2436 * This routine assumes no locks are held on entry.
eb44820c 2437 */
1da177e4
LT		 2438void
2439fc_remove_host(struct Scsi_Host *shost)
2440{
a53eb5e0
JS		 2441 struct fc_vport *vport = NULL, *next_vport = NULL;
2442 struct fc_rport *rport = NULL, *next_rport = NULL;
aedf3497
JS		 2443 struct workqueue_struct *work_q;
2444 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
a53eb5e0 2445 unsigned long flags;
a53eb5e0
JS		 2446
2447 spin_lock_irqsave(shost->host_lock, flags);
2448
2449 /* Remove any vports */
9ef3e4a4
JS		 2450 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2451 fc_queue_work(shost, &vport->vport_delete_work);
1da177e4
LT		 2452
2453 /* Remove any remote ports */
2454 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2455 &fc_host->rports, peers) {
2456 list_del(&rport->peers);
2457 rport->port_state = FC_PORTSTATE_DELETED;
2458 fc_queue_work(shost, &rport->rport_delete_work);
2459 }
2460
1da177e4 2461 list_for_each_entry_safe(rport, next_rport,
aedf3497
JS		 2462 &fc_host->rport_bindings, peers) {
2463 list_del(&rport->peers);
2464 rport->port_state = FC_PORTSTATE_DELETED;
2465 fc_queue_work(shost, &rport->rport_delete_work);
2466 }
2467
a53eb5e0
JS		 2468 spin_unlock_irqrestore(shost->host_lock, flags);
2469
aedf3497
JS		 2470 /* flush all scan work items */
2471 scsi_flush_work(shost);
2472
2473 /* flush all stgt delete, and rport delete work items, then kill it */
2474 if (fc_host->work_q) {
2475 work_q = fc_host->work_q;
2476 fc_host->work_q = NULL;
2477 destroy_workqueue(work_q);
2478 }
2479
2480 /* flush all devloss work items, then kill it */
2481 if (fc_host->devloss_work_q) {
2482 work_q = fc_host->devloss_work_q;
2483 fc_host->devloss_work_q = NULL;
2484 destroy_workqueue(work_q);
2485 }
1da177e4
LT		 2486}
2487EXPORT_SYMBOL(fc_remove_host);
2488
fff9d40c
MC		 2489static void fc_terminate_rport_io(struct fc_rport *rport)
2490{
2491 struct Scsi_Host *shost = rport_to_shost(rport);
2492 struct fc_internal *i = to_fc_internal(shost->transportt);
2493
2494 /* Involve the LLDD if possible to terminate all io on the rport. */
2495 if (i->f->terminate_rport_io)
2496 i->f->terminate_rport_io(rport);
2497
2498 /*
5d9fb5cc 2499 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
fff9d40c 2500 */
5d9fb5cc 2501 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
fff9d40c 2502}
aedf3497
JS		 2503
2504/**
25985edc 2505 * fc_starget_delete - called to delete the scsi descendants of an rport
c4028958 2506 * @work: remote port to be operated on.
eb44820c
RL		 2507 *
2508 * Deletes target and all sdevs.
2509 */
19a7b4ae 2510static void
c4028958 2511fc_starget_delete(struct work_struct *work)
19a7b4ae 2512{
c4028958
DH		 2513 struct fc_rport *rport =
2514 container_of(work, struct fc_rport, stgt_delete_work);
19a7b4ae 2515
fff9d40c 2516 fc_terminate_rport_io(rport);
19a7b4ae
JSEC		 2517 scsi_remove_target(&rport->dev);
2518}
2519
aedf3497
JS		 2520
2521/**
2522 * fc_rport_final_delete - finish rport termination and delete it.
c4028958 2523 * @work: remote port to be deleted.
eb44820c 2524 */
aedf3497 2525static void
c4028958 2526fc_rport_final_delete(struct work_struct *work)
aedf3497 2527{
c4028958
DH		 2528 struct fc_rport *rport =
2529 container_of(work, struct fc_rport, rport_delete_work);
aedf3497
JS		 2530 struct device *dev = &rport->dev;
2531 struct Scsi_Host *shost = rport_to_shost(rport);
0f29b966 2532 struct fc_internal *i = to_fc_internal(shost->transportt);
92740b24 2533 unsigned long flags;
8798a694 2534 int do_callback = 0;
aedf3497 2535
112f661d
NNS		 2536 fc_terminate_rport_io(rport);
2537
aedf3497 2538 /*
9ef3e4a4 2539 * if a scan is pending, flush the SCSI Host work_q so that
aedf3497
JS		 2540 * that we can reclaim the rport scan work element.
2541 */
2542 if (rport->flags & FC_RPORT_SCAN_PENDING)
2543 scsi_flush_work(shost);
2544
92740b24
JS		 2545 /*
2546 * Cancel any outstanding timers. These should really exist
2547 * only when rmmod'ing the LLDD and we're asking for
2548 * immediate termination of the rports
2549 */
2550 spin_lock_irqsave(shost->host_lock, flags);
2551 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2552 spin_unlock_irqrestore(shost->host_lock, flags);
2553 if (!cancel_delayed_work(&rport->fail_io_work))
2554 fc_flush_devloss(shost);
2555 if (!cancel_delayed_work(&rport->dev_loss_work))
2556 fc_flush_devloss(shost);
0353e085 2557 cancel_work_sync(&rport->scan_work);
92740b24
JS		 2558 spin_lock_irqsave(shost->host_lock, flags);
2559 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2560 }
2561 spin_unlock_irqrestore(shost->host_lock, flags);
2562
0f29b966
JS		 2563 /* Delete SCSI target and sdevs */
2564 if (rport->scsi_target_id != -1)
c4028958 2565 fc_starget_delete(&rport->stgt_delete_work);
92740b24
JS		 2566
2567 /*
2568 * Notify the driver that the rport is now dead. The LLDD will
2569 * also guarantee that any communication to the rport is terminated
4be98c0c
JS		 2570 *
2571 * Avoid this call if we already called it when we preserved the
2572 * rport for the binding.
92740b24 2573 */
8798a694 2574 spin_lock_irqsave(shost->host_lock, flags);
4be98c0c 2575 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
8798a694
MR		 2576 (i->f->dev_loss_tmo_callbk)) {
2577 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2578 do_callback = 1;
2579 }
2580 spin_unlock_irqrestore(shost->host_lock, flags);
2581
2582 if (do_callback)
0f29b966 2583 i->f->dev_loss_tmo_callbk(rport);
0f29b966 2584
9e4f5e29
JS		 2585 fc_bsg_remove(rport->rqst_q);
2586
aedf3497
JS		 2587 transport_remove_device(dev);
2588 device_del(dev);
2589 transport_destroy_device(dev);
4cd38e38 2590 scsi_host_put(shost); /* for fc_host->rport list */
3bdad7bd 2591 put_device(dev); /* for self-reference */
aedf3497
JS		 2592}
2593
2594
1da177e4
LT		 2595/**
2596 * fc_rport_create - allocates and creates a remote FC port.
2597 * @shost: scsi host the remote port is connected to.
2598 * @channel: Channel on shost port connected to.
2599 * @ids: The world wide names, fc address, and FC4 port
2600 * roles for the remote port.
2601 *
2602 * Allocates and creates the remoter port structure, including the
2603 * class and sysfs creation.
2604 *
2605 * Notes:
2606 * This routine assumes no locks are held on entry.
eb44820c 2607 */
44818efb 2608static struct fc_rport *
1da177e4
LT		 2609fc_rport_create(struct Scsi_Host *shost, int channel,
2610 struct fc_rport_identifiers *ids)
2611{
aedf3497 2612 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2613 struct fc_internal *fci = to_fc_internal(shost->transportt);
2614 struct fc_rport *rport;
2615 struct device *dev;
2616 unsigned long flags;
2617 int error;
2618 size_t size;
2619
2620 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
24669f75 2621 rport = kzalloc(size, GFP_KERNEL);
1da177e4 2622 if (unlikely(!rport)) {
cadbd4a5 2623 printk(KERN_ERR "%s: allocation failure\n", __func__);
1da177e4
LT		 2624 return NULL;
2625 }
1da177e4
LT		 2626
2627 rport->maxframe_size = -1;
2628 rport->supported_classes = FC_COS_UNSPECIFIED;
43ca910a 2629 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
1da177e4
LT		 2630 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2631 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2632 rport->port_id = ids->port_id;
2633 rport->roles = ids->roles;
2634 rport->port_state = FC_PORTSTATE_ONLINE;
2635 if (fci->f->dd_fcrport_size)
2636 rport->dd_data = &rport[1];
2637 rport->channel = channel;
0f29b966 2638 rport->fast_io_fail_tmo = -1;
1da177e4 2639
c4028958
DH		 2640 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2641 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2642 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2643 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2644 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
1da177e4
LT		 2645
2646 spin_lock_irqsave(shost->host_lock, flags);
2647
2648 rport->number = fc_host->next_rport_number++;
a53eb5e0 2649 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
1da177e4
LT		 2650 rport->scsi_target_id = fc_host->next_target_id++;
2651 else
2652 rport->scsi_target_id = -1;
aedf3497 2653 list_add_tail(&rport->peers, &fc_host->rports);
4cd38e38 2654 scsi_host_get(shost); /* for fc_host->rport list */
1da177e4
LT		 2655
2656 spin_unlock_irqrestore(shost->host_lock, flags);
2657
2658 dev = &rport->dev;
3bdad7bd
JS		 2659 device_initialize(dev); /* takes self reference */
2660 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
1da177e4 2661 dev->release = fc_rport_dev_release;
71610f55
KS		 2662 dev_set_name(dev, "rport-%d:%d-%d",
2663 shost->host_no, channel, rport->number);
1da177e4
LT		 2664 transport_setup_device(dev);
2665
2666 error = device_add(dev);
2667 if (error) {
2668 printk(KERN_ERR "FC Remote Port device_add failed\n");
2669 goto delete_rport;
2670 }
2671 transport_add_device(dev);
2672 transport_configure_device(dev);
2673
9e4f5e29
JS		 2674 fc_bsg_rportadd(shost, rport);
2675 /* ignore any bsg add error - we just can't do sgio */
2676
a53eb5e0 2677 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
1da177e4 2678 /* initiate a scan of the target */
aedf3497 2679 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2680 scsi_queue_work(shost, &rport->scan_work);
aedf3497 2681 }
1da177e4
LT		 2682
2683 return rport;
2684
2685delete_rport:
2686 transport_destroy_device(dev);
1da177e4
LT		 2687 spin_lock_irqsave(shost->host_lock, flags);
2688 list_del(&rport->peers);
4cd38e38 2689 scsi_host_put(shost); /* for fc_host->rport list */
1da177e4
LT		 2690 spin_unlock_irqrestore(shost->host_lock, flags);
2691 put_device(dev->parent);
2692 kfree(rport);
2693 return NULL;
2694}
2695
2696/**
eb44820c 2697 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
1da177e4
LT		 2698 * @shost: scsi host the remote port is connected to.
2699 * @channel: Channel on shost port connected to.
2700 * @ids: The world wide names, fc address, and FC4 port
2701 * roles for the remote port.
2702 *
2703 * The LLDD calls this routine to notify the transport of the existence
2704 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2705 * of the port, it's FC address (port_id), and the FC4 roles that are
2706 * active for the port.
2707 *
2708 * For ports that are FCP targets (aka scsi targets), the FC transport
2709 * maintains consistent target id bindings on behalf of the LLDD.
2710 * A consistent target id binding is an assignment of a target id to
2711 * a remote port identifier, which persists while the scsi host is
2712 * attached. The remote port can disappear, then later reappear, and
2713 * it's target id assignment remains the same. This allows for shifts
2714 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2715 * changes to the scsi subsystem which is based on scsi host number and
2716 * target id values. Bindings are only valid during the attachment of
2717 * the scsi host. If the host detaches, then later re-attaches, target
2718 * id bindings may change.
2719 *
2720 * This routine is responsible for returning a remote port structure.
2721 * The routine will search the list of remote ports it maintains
2722 * internally on behalf of consistent target id mappings. If found, the
2723 * remote port structure will be reused. Otherwise, a new remote port
2724 * structure will be allocated.
2725 *
2726 * Whenever a remote port is allocated, a new fc_remote_port class
2727 * device is created.
2728 *
2729 * Should not be called from interrupt context.
2730 *
2731 * Notes:
2732 * This routine assumes no locks are held on entry.
eb44820c 2733 */
1da177e4
LT		 2734struct fc_rport *
2735fc_remote_port_add(struct Scsi_Host *shost, int channel,
2736 struct fc_rport_identifiers *ids)
2737{
19a7b4ae 2738 struct fc_internal *fci = to_fc_internal(shost->transportt);
aedf3497 2739 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 2740 struct fc_rport *rport;
2741 unsigned long flags;
2742 int match = 0;
2743
aedf3497
JS		 2744 /* ensure any stgt delete functions are done */
2745 fc_flush_work(shost);
2746
19a7b4ae
JSEC		 2747 /*
2748 * Search the list of "active" rports, for an rport that has been
2749 * deleted, but we've held off the real delete while the target
2750 * is in a "blocked" state.
2751 */
2752 spin_lock_irqsave(shost->host_lock, flags);
2753
aedf3497 2754 list_for_each_entry(rport, &fc_host->rports, peers) {
19a7b4ae
JSEC		 2755
2756 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2757 (rport->channel == channel)) {
2758
aedf3497 2759 switch (fc_host->tgtid_bind_type) {
19a7b4ae
JSEC		 2760 case FC_TGTID_BIND_BY_WWPN:
2761 case FC_TGTID_BIND_NONE:
2762 if (rport->port_name == ids->port_name)
2763 match = 1;
2764 break;
2765 case FC_TGTID_BIND_BY_WWNN:
2766 if (rport->node_name == ids->node_name)
2767 match = 1;
2768 break;
2769 case FC_TGTID_BIND_BY_ID:
2770 if (rport->port_id == ids->port_id)
2771 match = 1;
2772 break;
2773 }
2774
2775 if (match) {
19a7b4ae
JSEC		 2776
2777 memcpy(&rport->node_name, &ids->node_name,
2778 sizeof(rport->node_name));
2779 memcpy(&rport->port_name, &ids->port_name,
2780 sizeof(rport->port_name));
2781 rport->port_id = ids->port_id;
2782
2783 rport->port_state = FC_PORTSTATE_ONLINE;
2784 rport->roles = ids->roles;
2785
2786 spin_unlock_irqrestore(shost->host_lock, flags);
2787
2788 if (fci->f->dd_fcrport_size)
2789 memset(rport->dd_data, 0,
2790 fci->f->dd_fcrport_size);
2791
2792 /*
92740b24
JS		 2793 * If we were not a target, cancel the
2794 * io terminate and rport timers, and
2795 * we're done.
2796 *
2797 * If we were a target, but our new role
2798 * doesn't indicate a target, leave the
2799 * timers running expecting the role to
2800 * change as the target fully logs in. If
2801 * it doesn't, the target will be torn down.
2802 *
2803 * If we were a target, and our role shows
2804 * we're still a target, cancel the timers
2805 * and kick off a scan.
19a7b4ae 2806 */
19a7b4ae 2807
92740b24
JS		 2808 /* was a target, not in roles */
2809 if ((rport->scsi_target_id != -1) &&
a53eb5e0 2810 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
92740b24 2811 return rport;
19a7b4ae
JSEC		 2812
2813 /*
92740b24
JS		 2814 * Stop the fail io and dev_loss timers.
2815 * If they flush, the port_state will
2816 * be checked and will NOOP the function.
19a7b4ae 2817 */
0f29b966
JS		 2818 if (!cancel_delayed_work(&rport->fail_io_work))
2819 fc_flush_devloss(shost);
92740b24 2820 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 2821 fc_flush_devloss(shost);
2822
2823 spin_lock_irqsave(shost->host_lock, flags);
2824
fff9d40c 2825 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
4be98c0c
JS		 2826 FC_RPORT_DEVLOSS_PENDING |
2827 FC_RPORT_DEVLOSS_CALLBK_DONE);
19a7b4ae 2828
8fb2ef89
MC		 2829 spin_unlock_irqrestore(shost->host_lock, flags);
2830
92740b24
JS		 2831 /* if target, initiate a scan */
2832 if (rport->scsi_target_id != -1) {
5d9fb5cc
MC		 2833 scsi_target_unblock(&rport->dev,
2834 SDEV_RUNNING);
8fb2ef89
MC		 2835 spin_lock_irqsave(shost->host_lock,
2836 flags);
92740b24
JS		 2837 rport->flags |= FC_RPORT_SCAN_PENDING;
2838 scsi_queue_work(shost,
2839 &rport->scan_work);
2840 spin_unlock_irqrestore(shost->host_lock,
2841 flags);
8fb2ef89 2842 }
a0785edf 2843
9e4f5e29
JS		 2844 fc_bsg_goose_queue(rport);
2845
19a7b4ae
JSEC		 2846 return rport;
2847 }
2848 }
2849 }
2850
92740b24
JS		 2851 /*
2852 * Search the bindings array
2853 * Note: if never a FCP target, you won't be on this list
2854 */
aedf3497 2855 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
1da177e4
LT		 2856
2857 /* search for a matching consistent binding */
2858
aedf3497 2859 list_for_each_entry(rport, &fc_host->rport_bindings,
1da177e4
LT		 2860 peers) {
2861 if (rport->channel != channel)
2862 continue;
2863
aedf3497 2864 switch (fc_host->tgtid_bind_type) {
1da177e4
LT		 2865 case FC_TGTID_BIND_BY_WWPN:
2866 if (rport->port_name == ids->port_name)
2867 match = 1;
2868 break;
2869 case FC_TGTID_BIND_BY_WWNN:
2870 if (rport->node_name == ids->node_name)
2871 match = 1;
2872 break;
2873 case FC_TGTID_BIND_BY_ID:
2874 if (rport->port_id == ids->port_id)
2875 match = 1;
2876 break;
2877 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2878 break;
2879 }
2880
2881 if (match) {
aedf3497 2882 list_move_tail(&rport->peers, &fc_host->rports);
1da177e4
LT		 2883 break;
2884 }
2885 }
2886
1da177e4
LT		 2887 if (match) {
2888 memcpy(&rport->node_name, &ids->node_name,
2889 sizeof(rport->node_name));
2890 memcpy(&rport->port_name, &ids->port_name,
2891 sizeof(rport->port_name));
2892 rport->port_id = ids->port_id;
2893 rport->roles = ids->roles;
2894 rport->port_state = FC_PORTSTATE_ONLINE;
fff9d40c 2895 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 2896
19a7b4ae
JSEC		 2897 if (fci->f->dd_fcrport_size)
2898 memset(rport->dd_data, 0,
2899 fci->f->dd_fcrport_size);
8fb2ef89
MC		 2900 spin_unlock_irqrestore(shost->host_lock, flags);
2901
2902 if (ids->roles & FC_PORT_ROLE_FCP_TARGET) {
5d9fb5cc 2903 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
19a7b4ae 2904
1da177e4 2905 /* initiate a scan of the target */
8fb2ef89 2906 spin_lock_irqsave(shost->host_lock, flags);
aedf3497 2907 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 2908 scsi_queue_work(shost, &rport->scan_work);
a0785edf 2909 spin_unlock_irqrestore(shost->host_lock, flags);
8fb2ef89 2910 }
1da177e4
LT		 2911 return rport;
2912 }
2913 }
2914
19a7b4ae
JSEC		 2915 spin_unlock_irqrestore(shost->host_lock, flags);
2916
1da177e4
LT		 2917 /* No consistent binding found - create new remote port entry */
2918 rport = fc_rport_create(shost, channel, ids);
2919
2920 return rport;
2921}
2922EXPORT_SYMBOL(fc_remote_port_add);
2923
1da177e4
LT		 2924
2925/**
eb44820c 2926 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
1da177e4
LT		 2927 * @rport: The remote port that no longer exists
2928 *
2929 * The LLDD calls this routine to notify the transport that a remote
2930 * port is no longer part of the topology. Note: Although a port
2931 * may no longer be part of the topology, it may persist in the remote
19a7b4ae 2932 * ports displayed by the fc_host. We do this under 2 conditions:
eb44820c 2933 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
19a7b4ae
JSEC		 2934 * This allows the port to temporarily disappear, then reappear without
2935 * disrupting the SCSI device tree attached to it. During the "blocked"
2936 * period the port will still exist.
eb44820c 2937 * 2) If the port was a scsi target and disappears for longer than we
19a7b4ae
JSEC		 2938 * expect, we'll delete the port and the tear down the SCSI device tree
2939 * attached to it. However, we want to semi-persist the target id assigned
2940 * to that port if it eventually does exist. The port structure will
2941 * remain (although with minimal information) so that the target id
2942 * bindings remails.
1da177e4
LT		 2943 *
2944 * If the remote port is not an FCP Target, it will be fully torn down
2945 * and deallocated, including the fc_remote_port class device.
2946 *
19a7b4ae
JSEC		 2947 * If the remote port is an FCP Target, the port will be placed in a
2948 * temporary blocked state. From the LLDD's perspective, the rport no
2949 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2950 * exists, but all sdevs on it are blocked from further I/O. The following
eb44820c
RL		 2951 * is then expected.
2952 *
19a7b4ae
JSEC		 2953 * If the remote port does not return (signaled by a LLDD call to
2954 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2955 * scsi target is removed - killing all outstanding i/o and removing the
2956 * scsi devices attached ot it. The port structure will be marked Not
2957 * Present and be partially cleared, leaving only enough information to
2958 * recognize the remote port relative to the scsi target id binding if
2959 * it later appears. The port will remain as long as there is a valid
2960 * binding (e.g. until the user changes the binding type or unloads the
2961 * scsi host with the binding).
1da177e4 2962 *
19a7b4ae
JSEC		 2963 * If the remote port returns within the dev_loss_tmo value (and matches
2964 * according to the target id binding type), the port structure will be
2965 * reused. If it is no longer a SCSI target, the target will be torn
2966 * down. If it continues to be a SCSI target, then the target will be
2967 * unblocked (allowing i/o to be resumed), and a scan will be activated
2968 * to ensure that all luns are detected.
2969 *
2970 * Called from normal process context only - cannot be called from interrupt.
1da177e4
LT		 2971 *
2972 * Notes:
2973 * This routine assumes no locks are held on entry.
eb44820c 2974 */
1da177e4
LT		 2975void
2976fc_remote_port_delete(struct fc_rport *rport)
2977{
aedf3497 2978 struct Scsi_Host *shost = rport_to_shost(rport);
36dd288f 2979 unsigned long timeout = rport->dev_loss_tmo;
aedf3497
JS		 2980 unsigned long flags;
2981
2982 /*
2983 * No need to flush the fc_host work_q's, as all adds are synchronous.
2984 *
2985 * We do need to reclaim the rport scan work element, so eventually
2986 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2987 * there's still a scan pending.
2988 */
2989
2990 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 2991
92740b24 2992 if (rport->port_state != FC_PORTSTATE_ONLINE) {
aedf3497 2993 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 2994 return;
2995 }
2996
92740b24
JS		 2997 /*
2998 * In the past, we if this was not an FCP-Target, we would
2999 * unconditionally just jump to deleting the rport.
3000 * However, rports can be used as node containers by the LLDD,
3001 * and its not appropriate to just terminate the rport at the
3002 * first sign of a loss in connectivity. The LLDD may want to
3003 * send ELS traffic to re-validate the login. If the rport is
3004 * immediately deleted, it makes it inappropriate for a node
3005 * container.
3006 * So... we now unconditionally wait dev_loss_tmo before
3007 * destroying an rport.
3008 */
3009
aedf3497
JS		 3010 rport->port_state = FC_PORTSTATE_BLOCKED;
3011
3012 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3013
3014 spin_unlock_irqrestore(shost->host_lock, flags);
3015
19a7b4ae 3016 scsi_target_block(&rport->dev);
1da177e4 3017
0f29b966
JS		 3018 /* see if we need to kill io faster than waiting for device loss */
3019 if ((rport->fast_io_fail_tmo != -1) &&
fff9d40c 3020 (rport->fast_io_fail_tmo < timeout))
0f29b966
JS		 3021 fc_queue_devloss_work(shost, &rport->fail_io_work,
3022 rport->fast_io_fail_tmo * HZ);
3023
19a7b4ae 3024 /* cap the length the devices can be blocked until they are deleted */
aedf3497 3025 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
1da177e4
LT		 3026}
3027EXPORT_SYMBOL(fc_remote_port_delete);
3028
3029/**
eb44820c 3030 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
1da177e4 3031 * @rport: The remote port that changed.
eb44820c 3032 * @roles: New roles for this port.
1da177e4 3033 *
eb44820c
RL		 3034 * Description: The LLDD calls this routine to notify the transport that the
3035 * roles on a remote port may have changed. The largest effect of this is
1da177e4
LT		 3036 * if a port now becomes a FCP Target, it must be allocated a
3037 * scsi target id. If the port is no longer a FCP target, any
3038 * scsi target id value assigned to it will persist in case the
3039 * role changes back to include FCP Target. No changes in the scsi
3040 * midlayer will be invoked if the role changes (in the expectation
3041 * that the role will be resumed. If it doesn't normal error processing
3042 * will take place).
3043 *
3044 * Should not be called from interrupt context.
3045 *
3046 * Notes:
3047 * This routine assumes no locks are held on entry.
eb44820c 3048 */
1da177e4
LT		 3049void
3050fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3051{
3052 struct Scsi_Host *shost = rport_to_shost(rport);
aedf3497 3053 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1da177e4
LT		 3054 unsigned long flags;
3055 int create = 0;
3056
1da177e4 3057 spin_lock_irqsave(shost->host_lock, flags);
a53eb5e0 3058 if (roles & FC_PORT_ROLE_FCP_TARGET) {
19a7b4ae
JSEC		 3059 if (rport->scsi_target_id == -1) {
3060 rport->scsi_target_id = fc_host->next_target_id++;
3061 create = 1;
a53eb5e0 3062 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
19a7b4ae 3063 create = 1;
1da177e4 3064 }
1da177e4 3065
19a7b4ae
JSEC		 3066 rport->roles = roles;
3067
aedf3497
JS		 3068 spin_unlock_irqrestore(shost->host_lock, flags);
3069
19a7b4ae
JSEC		 3070 if (create) {
3071 /*
3072 * There may have been a delete timer running on the
3073 * port. Ensure that it is cancelled as we now know
3074 * the port is an FCP Target.
3075 * Note: we know the rport is exists and in an online
3076 * state as the LLDD would not have had an rport
3077 * reference to pass us.
3078 *
3079 * Take no action on the del_timer failure as the state
3080 * machine state change will validate the
3081 * transaction.
3082 */
0f29b966
JS		 3083 if (!cancel_delayed_work(&rport->fail_io_work))
3084 fc_flush_devloss(shost);
19a7b4ae 3085 if (!cancel_delayed_work(&rport->dev_loss_work))
aedf3497
JS		 3086 fc_flush_devloss(shost);
3087
3088 spin_lock_irqsave(shost->host_lock, flags);
fff9d40c 3089 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
0eecee41
JS		 3090 FC_RPORT_DEVLOSS_PENDING |
3091 FC_RPORT_DEVLOSS_CALLBK_DONE);
aedf3497
JS		 3092 spin_unlock_irqrestore(shost->host_lock, flags);
3093
3094 /* ensure any stgt delete functions are done */
3095 fc_flush_work(shost);
19a7b4ae 3096
5d9fb5cc 3097 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
1da177e4 3098 /* initiate a scan of the target */
aedf3497
JS		 3099 spin_lock_irqsave(shost->host_lock, flags);
3100 rport->flags |= FC_RPORT_SCAN_PENDING;
1da177e4 3101 scsi_queue_work(shost, &rport->scan_work);
aedf3497 3102 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae 3103 }
1da177e4
LT		 3104}
3105EXPORT_SYMBOL(fc_remote_port_rolechg);
3106
3107/**
eb44820c 3108 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
92740b24 3109 * @work: rport target that failed to reappear in the allotted time.
eb44820c
RL		 3110 *
3111 * Description: An attempt to delete a remote port blocks, and if it fails
3112 * to return in the allotted time this gets called.
3113 */
1da177e4 3114static void
c4028958 3115fc_timeout_deleted_rport(struct work_struct *work)
1da177e4 3116{
c4028958
DH		 3117 struct fc_rport *rport =
3118 container_of(work, struct fc_rport, dev_loss_work.work);
19a7b4ae 3119 struct Scsi_Host *shost = rport_to_shost(rport);
4be98c0c 3120 struct fc_internal *i = to_fc_internal(shost->transportt);
aedf3497 3121 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
19a7b4ae 3122 unsigned long flags;
8798a694 3123 int do_callback = 0;
1da177e4 3124
19a7b4ae 3125 spin_lock_irqsave(shost->host_lock, flags);
1da177e4 3126
aedf3497
JS		 3127 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3128
1da177e4 3129 /*
92740b24
JS		 3130 * If the port is ONLINE, then it came back. If it was a SCSI
3131 * target, validate it still is. If not, tear down the
3132 * scsi_target on it.
1da177e4 3133 */
aedf3497 3134 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
92740b24 3135 (rport->scsi_target_id != -1) &&
a53eb5e0 3136 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
19a7b4ae 3137 dev_printk(KERN_ERR, &rport->dev,
aedf3497
JS		 3138 "blocked FC remote port time out: no longer"
3139 " a FCP target, removing starget\n");
aedf3497 3140 spin_unlock_irqrestore(shost->host_lock, flags);
5d9fb5cc 3141 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
a0785edf 3142 fc_queue_work(shost, &rport->stgt_delete_work);
19a7b4ae
JSEC		 3143 return;
3144 }
1da177e4 3145
92740b24 3146 /* NOOP state - we're flushing workq's */
19a7b4ae
JSEC		 3147 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3148 spin_unlock_irqrestore(shost->host_lock, flags);
3149 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3150 "blocked FC remote port time out: leaving"
3151 " rport%s alone\n",
3152 (rport->scsi_target_id != -1) ? " and starget" : "");
19a7b4ae
JSEC		 3153 return;
3154 }
1da177e4 3155
92740b24
JS		 3156 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3157 (rport->scsi_target_id == -1)) {
aedf3497
JS		 3158 list_del(&rport->peers);
3159 rport->port_state = FC_PORTSTATE_DELETED;
19a7b4ae 3160 dev_printk(KERN_ERR, &rport->dev,
92740b24
JS		 3161 "blocked FC remote port time out: removing"
3162 " rport%s\n",
3163 (rport->scsi_target_id != -1) ? " and starget" : "");
aedf3497
JS		 3164 fc_queue_work(shost, &rport->rport_delete_work);
3165 spin_unlock_irqrestore(shost->host_lock, flags);
19a7b4ae
JSEC		 3166 return;
3167 }
1da177e4 3168
19a7b4ae
JSEC		 3169 dev_printk(KERN_ERR, &rport->dev,
3170 "blocked FC remote port time out: removing target and "
3171 "saving binding\n");
3172
aedf3497 3173 list_move_tail(&rport->peers, &fc_host->rport_bindings);
1da177e4
LT		 3174
3175 /*
19a7b4ae
JSEC		 3176 * Note: We do not remove or clear the hostdata area. This allows
3177 * host-specific target data to persist along with the
3178 * scsi_target_id. It's up to the host to manage it's hostdata area.
1da177e4 3179 */
1da177e4 3180
19a7b4ae
JSEC		 3181 /*
3182 * Reinitialize port attributes that may change if the port comes back.
3183 */
3184 rport->maxframe_size = -1;
3185 rport->supported_classes = FC_COS_UNSPECIFIED;
a53eb5e0 3186 rport->roles = FC_PORT_ROLE_UNKNOWN;
aedf3497 3187 rport->port_state = FC_PORTSTATE_NOTPRESENT;
fff9d40c 3188 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
1da177e4 3189
f78badb1
JS		 3190 /*
3191 * Pre-emptively kill I/O rather than waiting for the work queue
3192 * item to teardown the starget. (FCOE libFC folks prefer this
3193 * and to have the rport_port_id still set when it's done).
3194 */
3195 spin_unlock_irqrestore(shost->host_lock, flags);
3196 fc_terminate_rport_io(rport);
3197
8798a694
MR		 3198 spin_lock_irqsave(shost->host_lock, flags);
3199
3200 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
f78badb1 3201
8798a694
MR		 3202 /* remove the identifiers that aren't used in the consisting binding */
3203 switch (fc_host->tgtid_bind_type) {
3204 case FC_TGTID_BIND_BY_WWPN:
3205 rport->node_name = -1;
3206 rport->port_id = -1;
3207 break;
3208 case FC_TGTID_BIND_BY_WWNN:
3209 rport->port_name = -1;
3210 rport->port_id = -1;
3211 break;
3212 case FC_TGTID_BIND_BY_ID:
3213 rport->node_name = -1;
3214 rport->port_name = -1;
3215 break;
3216 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3217 break;
3218 }
3219
3220 /*
3221 * As this only occurs if the remote port (scsi target)
3222 * went away and didn't come back - we'll remove
3223 * all attached scsi devices.
3224 */
3225 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3226 fc_queue_work(shost, &rport->stgt_delete_work);
3227
3228 do_callback = 1;
19a7b4ae
JSEC		 3229 }
3230
8798a694 3231 spin_unlock_irqrestore(shost->host_lock, flags);
4be98c0c
JS		 3232
3233 /*
3234 * Notify the driver that the rport is now dead. The LLDD will
3235 * also guarantee that any communication to the rport is terminated
3236 *
3237 * Note: we set the CALLBK_DONE flag above to correspond
3238 */
8798a694 3239 if (do_callback && i->f->dev_loss_tmo_callbk)
4be98c0c 3240 i->f->dev_loss_tmo_callbk(rport);
1da177e4 3241}
1da177e4 3242
4be98c0c 3243
0f29b966 3244/**
eb44820c 3245 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
c4028958 3246 * @work: rport to terminate io on.
0f29b966
JS		 3247 *
3248 * Notes: Only requests the failure of the io, not that all are flushed
3249 * prior to returning.
eb44820c 3250 */
0f29b966 3251static void
c4028958 3252fc_timeout_fail_rport_io(struct work_struct *work)
0f29b966 3253{
c4028958
DH		 3254 struct fc_rport *rport =
3255 container_of(work, struct fc_rport, fail_io_work.work);
0f29b966
JS		 3256
3257 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3258 return;
3259
fff9d40c
MC		 3260 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3261 fc_terminate_rport_io(rport);
0f29b966
JS		 3262}
3263
1da177e4
LT		 3264/**
3265 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
c4028958 3266 * @work: remote port to be scanned.
eb44820c 3267 */
1da177e4 3268static void
c4028958 3269fc_scsi_scan_rport(struct work_struct *work)
1da177e4 3270{
c4028958
DH		 3271 struct fc_rport *rport =
3272 container_of(work, struct fc_rport, scan_work);
aedf3497 3273 struct Scsi_Host *shost = rport_to_shost(rport);
03f002f7 3274 struct fc_internal *i = to_fc_internal(shost->transportt);
42e33148
JSEC		 3275 unsigned long flags;
3276
aedf3497 3277 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
03f002f7
CS		 3278 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3279 !(i->f->disable_target_scan)) {
aedf3497 3280 scsi_scan_target(&rport->dev, rport->channel,
1d645088
HR		 3281 rport->scsi_target_id, SCAN_WILD_CARD,
3282 SCSI_SCAN_RESCAN);
42e33148 3283 }
aedf3497
JS		 3284
3285 spin_lock_irqsave(shost->host_lock, flags);
3286 rport->flags &= ~FC_RPORT_SCAN_PENDING;
42e33148
JSEC		 3287 spin_unlock_irqrestore(shost->host_lock, flags);
3288}
3289
65d430fa
CS		 3290/**
3291 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3292 * @cmnd: SCSI command that scsi_eh is trying to recover
3293 *
3294 * This routine can be called from a FC LLD scsi_eh callback. It
3295 * blocks the scsi_eh thread until the fc_rport leaves the
2f2eb587
CS		 3296 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3297 * necessary to avoid the scsi_eh failing recovery actions for blocked
3298 * rports which would lead to offlined SCSI devices.
3299 *
3300 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3301 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3302 * passed back to scsi_eh.
65d430fa 3303 */
2f2eb587 3304int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
65d430fa
CS		 3305{
3306 struct Scsi_Host *shost = cmnd->device->host;
3307 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3308 unsigned long flags;
3309
3310 spin_lock_irqsave(shost->host_lock, flags);
2f2eb587
CS		 3311 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3312 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
65d430fa
CS		 3313 spin_unlock_irqrestore(shost->host_lock, flags);
3314 msleep(1000);
3315 spin_lock_irqsave(shost->host_lock, flags);
3316 }
3317 spin_unlock_irqrestore(shost->host_lock, flags);
2f2eb587
CS		 3318
3319 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3320 return FAST_IO_FAIL;
3321
3322 return 0;
65d430fa
CS		 3323}
3324EXPORT_SYMBOL(fc_block_scsi_eh);
42e33148 3325
a53eb5e0 3326/**
a30c3f69 3327 * fc_vport_setup - allocates and creates a FC virtual port.
a53eb5e0
JS		 3328 * @shost: scsi host the virtual port is connected to.
3329 * @channel: Channel on shost port connected to.
3330 * @pdev: parent device for vport
3331 * @ids: The world wide names, FC4 port roles, etc for
3332 * the virtual port.
3333 * @ret_vport: The pointer to the created vport.
3334 *
3335 * Allocates and creates the vport structure, calls the parent host
3336 * to instantiate the vport, the completes w/ class and sysfs creation.
3337 *
3338 * Notes:
3339 * This routine assumes no locks are held on entry.
eb44820c 3340 */
a53eb5e0 3341static int
a30c3f69 3342fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
a53eb5e0
JS		 3343 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3344{
3345 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3346 struct fc_internal *fci = to_fc_internal(shost->transportt);
3347 struct fc_vport *vport;
3348 struct device *dev;
3349 unsigned long flags;
3350 size_t size;
3351 int error;
3352
3353 *ret_vport = NULL;
3354
3355 if ( ! fci->f->vport_create)
3356 return -ENOENT;
3357
3358 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3359 vport = kzalloc(size, GFP_KERNEL);
3360 if (unlikely(!vport)) {
cadbd4a5 3361 printk(KERN_ERR "%s: allocation failure\n", __func__);
a53eb5e0
JS		 3362 return -ENOMEM;
3363 }
3364
3365 vport->vport_state = FC_VPORT_UNKNOWN;
3366 vport->vport_last_state = FC_VPORT_UNKNOWN;
3367 vport->node_name = ids->node_name;
3368 vport->port_name = ids->port_name;
3369 vport->roles = ids->roles;
3370 vport->vport_type = ids->vport_type;
3371 if (fci->f->dd_fcvport_size)
3372 vport->dd_data = &vport[1];
3373 vport->shost = shost;
3374 vport->channel = channel;
3375 vport->flags = FC_VPORT_CREATING;
9ef3e4a4 3376 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
a53eb5e0
JS		 3377
3378 spin_lock_irqsave(shost->host_lock, flags);
3379
3380 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3381 spin_unlock_irqrestore(shost->host_lock, flags);
3382 kfree(vport);
3383 return -ENOSPC;
3384 }
3385 fc_host->npiv_vports_inuse++;
3386 vport->number = fc_host->next_vport_number++;
3387 list_add_tail(&vport->peers, &fc_host->vports);
4cd38e38 3388 scsi_host_get(shost); /* for fc_host->vport list */
a53eb5e0
JS		 3389
3390 spin_unlock_irqrestore(shost->host_lock, flags);
3391
3392 dev = &vport->dev;
3393 device_initialize(dev); /* takes self reference */
3394 dev->parent = get_device(pdev); /* takes parent reference */
3395 dev->release = fc_vport_dev_release;
71610f55
KS		 3396 dev_set_name(dev, "vport-%d:%d-%d",
3397 shost->host_no, channel, vport->number);
a53eb5e0
JS		 3398 transport_setup_device(dev);
3399
3400 error = device_add(dev);
3401 if (error) {
3402 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3403 goto delete_vport;
3404 }
3405 transport_add_device(dev);
3406 transport_configure_device(dev);
3407
3408 error = fci->f->vport_create(vport, ids->disable);
3409 if (error) {
3410 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3411 goto delete_vport_all;
3412 }
3413
3414 /*
3415 * if the parent isn't the physical adapter's Scsi_Host, ensure
3416 * the Scsi_Host at least contains ia symlink to the vport.
3417 */
3418 if (pdev != &shost->shost_gendev) {
3419 error = sysfs_create_link(&shost->shost_gendev.kobj,
71610f55 3420 &dev->kobj, dev_name(dev));
a53eb5e0
JS		 3421 if (error)
3422 printk(KERN_ERR
3423 "%s: Cannot create vport symlinks for "
3424 "%s, err=%d\n",
71610f55 3425 __func__, dev_name(dev), error);
a53eb5e0
JS		 3426 }
3427 spin_lock_irqsave(shost->host_lock, flags);
3428 vport->flags &= ~FC_VPORT_CREATING;
3429 spin_unlock_irqrestore(shost->host_lock, flags);
3430
3431 dev_printk(KERN_NOTICE, pdev,
71610f55 3432 "%s created via shost%d channel %d\n", dev_name(dev),
a53eb5e0
JS		 3433 shost->host_no, channel);
3434
3435 *ret_vport = vport;
3436
3437 return 0;
3438
3439delete_vport_all:
3440 transport_remove_device(dev);
3441 device_del(dev);
3442delete_vport:
3443 transport_destroy_device(dev);
3444 spin_lock_irqsave(shost->host_lock, flags);
3445 list_del(&vport->peers);
4cd38e38 3446 scsi_host_put(shost); /* for fc_host->vport list */
a53eb5e0
JS		 3447 fc_host->npiv_vports_inuse--;
3448 spin_unlock_irqrestore(shost->host_lock, flags);
3449 put_device(dev->parent);
3450 kfree(vport);
3451
3452 return error;
3453}
3454
a30c3f69
AV		 3455/**
3456 * fc_vport_create - Admin App or LLDD requests creation of a vport
3457 * @shost: scsi host the virtual port is connected to.
3458 * @channel: channel on shost port connected to.
3459 * @ids: The world wide names, FC4 port roles, etc for
3460 * the virtual port.
3461 *
3462 * Notes:
3463 * This routine assumes no locks are held on entry.
3464 */
3465struct fc_vport *
3466fc_vport_create(struct Scsi_Host *shost, int channel,
3467 struct fc_vport_identifiers *ids)
3468{
3469 int stat;
3470 struct fc_vport *vport;
3471
3472 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3473 ids, &vport);
3474 return stat ? NULL : vport;
3475}
3476EXPORT_SYMBOL(fc_vport_create);
a53eb5e0
JS		 3477
3478/**
3479 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3480 * @vport: fc_vport to be terminated
3481 *
3482 * Calls the LLDD vport_delete() function, then deallocates and removes
3483 * the vport from the shost and object tree.
3484 *
3485 * Notes:
3486 * This routine assumes no locks are held on entry.
eb44820c 3487 */
a53eb5e0
JS		 3488int
3489fc_vport_terminate(struct fc_vport *vport)
3490{
3491 struct Scsi_Host *shost = vport_to_shost(vport);
3492 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3493 struct fc_internal *i = to_fc_internal(shost->transportt);
3494 struct device *dev = &vport->dev;
3495 unsigned long flags;
3496 int stat;
3497
a53eb5e0
JS		 3498 if (i->f->vport_delete)
3499 stat = i->f->vport_delete(vport);
3500 else
3501 stat = -ENOENT;
3502
3503 spin_lock_irqsave(shost->host_lock, flags);
3504 vport->flags &= ~FC_VPORT_DELETING;
3505 if (!stat) {
3506 vport->flags |= FC_VPORT_DELETED;
3507 list_del(&vport->peers);
3508 fc_host->npiv_vports_inuse--;
4cd38e38 3509 scsi_host_put(shost); /* for fc_host->vport list */
a53eb5e0
JS		 3510 }
3511 spin_unlock_irqrestore(shost->host_lock, flags);
3512
3513 if (stat)
3514 return stat;
3515
3516 if (dev->parent != &shost->shost_gendev)
71610f55 3517 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
a53eb5e0
JS		 3518 transport_remove_device(dev);
3519 device_del(dev);
3520 transport_destroy_device(dev);
3521
3522 /*
3523 * Removing our self-reference should mean our
3524 * release function gets called, which will drop the remaining
3525 * parent reference and free the data structure.
3526 */
3527 put_device(dev); /* for self-reference */
3528
3529 return 0; /* SUCCESS */
3530}
3531EXPORT_SYMBOL(fc_vport_terminate);
3532
9ef3e4a4
JS		 3533/**
3534 * fc_vport_sched_delete - workq-based delete request for a vport
9ef3e4a4 3535 * @work: vport to be deleted.
eb44820c 3536 */
9ef3e4a4
JS		 3537static void
3538fc_vport_sched_delete(struct work_struct *work)
3539{
3540 struct fc_vport *vport =
3541 container_of(work, struct fc_vport, vport_delete_work);
3542 int stat;
3543
3544 stat = fc_vport_terminate(vport);
3545 if (stat)
3546 dev_printk(KERN_ERR, vport->dev.parent,
3547 "%s: %s could not be deleted created via "
cadbd4a5 3548 "shost%d channel %d - error %d\n", __func__,
71610f55 3549 dev_name(&vport->dev), vport->shost->host_no,
9ef3e4a4
JS		 3550 vport->channel, stat);
3551}
3552
a53eb5e0 3553
9e4f5e29
JS		 3554/*
3555 * BSG support
3556 */
3557
3558
3559/**
3560 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3561 * @job: fc_bsg_job that is to be torn down
3562 */
3563static void
3564fc_destroy_bsgjob(struct fc_bsg_job *job)
3565{
3566 unsigned long flags;
3567
3568 spin_lock_irqsave(&job->job_lock, flags);
3569 if (job->ref_cnt) {
3570 spin_unlock_irqrestore(&job->job_lock, flags);
3571 return;
3572 }
3573 spin_unlock_irqrestore(&job->job_lock, flags);
3574
3575 put_device(job->dev); /* release reference for the request */
3576
3577 kfree(job->request_payload.sg_list);
3578 kfree(job->reply_payload.sg_list);
3579 kfree(job);
3580}
3581
9e4f5e29
JS		 3582/**
3583 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3584 * completed
3585 * @job: fc_bsg_job that is complete
3586 */
3587static void
3588fc_bsg_jobdone(struct fc_bsg_job *job)
3589{
3590 struct request *req = job->req;
3591 struct request *rsp = req->next_rq;
9e4f5e29
JS		 3592 int err;
3593
9e4f5e29 3594 err = job->req->errors = job->reply->result;
b5c6f776 3595
9e4f5e29
JS		 3596 if (err < 0)
3597 /* we're only returning the result field in the reply */
3598 job->req->sense_len = sizeof(uint32_t);
3599 else
3600 job->req->sense_len = job->reply_len;
3601
3602 /* we assume all request payload was transferred, residual == 0 */
3603 req->resid_len = 0;
3604
3605 if (rsp) {
3606 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3607
3608 /* set reply (bidi) residual */
3609 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3610 rsp->resid_len);
3611 }
b5c6f776
GM		 3612 blk_complete_request(req);
3613}
3614
3615/**
3616 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
fe5d20c8 3617 * @rq: BSG request that holds the job to be destroyed
b5c6f776
GM		 3618 */
3619static void fc_bsg_softirq_done(struct request *rq)
3620{
3621 struct fc_bsg_job *job = rq->special;
3622 unsigned long flags;
9e4f5e29 3623
b5c6f776
GM		 3624 spin_lock_irqsave(&job->job_lock, flags);
3625 job->state_flags |= FC_RQST_STATE_DONE;
3626 job->ref_cnt--;
3627 spin_unlock_irqrestore(&job->job_lock, flags);
9e4f5e29 3628
b5c6f776 3629 blk_end_request_all(rq, rq->errors);
9e4f5e29
JS		 3630 fc_destroy_bsgjob(job);
3631}
3632
9e4f5e29
JS		 3633/**
3634 * fc_bsg_job_timeout - handler for when a bsg request timesout
3635 * @req: request that timed out
3636 */
3637static enum blk_eh_timer_return
3638fc_bsg_job_timeout(struct request *req)
3639{
3640 struct fc_bsg_job *job = (void *) req->special;
3641 struct Scsi_Host *shost = job->shost;
3642 struct fc_internal *i = to_fc_internal(shost->transportt);
3643 unsigned long flags;
3644 int err = 0, done = 0;
3645
3646 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3647 return BLK_EH_RESET_TIMER;
3648
3649 spin_lock_irqsave(&job->job_lock, flags);
3650 if (job->state_flags & FC_RQST_STATE_DONE)
3651 done = 1;
3652 else
3653 job->ref_cnt++;
3654 spin_unlock_irqrestore(&job->job_lock, flags);
3655
3656 if (!done && i->f->bsg_timeout) {
3657 /* call LLDD to abort the i/o as it has timed out */
3658 err = i->f->bsg_timeout(job);
b8f08645
SS		 3659 if (err == -EAGAIN) {
3660 job->ref_cnt--;
3661 return BLK_EH_RESET_TIMER;
3662 } else if (err)
9e4f5e29
JS		 3663 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3664 "abort failed with status %d\n", err);
3665 }
3666
9e4f5e29 3667 /* the blk_end_sync_io() doesn't check the error */
47e7e89e
GM		 3668 if (done)
3669 return BLK_EH_NOT_HANDLED;
3670 else
3671 return BLK_EH_HANDLED;
9e4f5e29
JS		 3672}
3673
9e4f5e29
JS		 3674static int
3675fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3676{
3677 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3678
3679 BUG_ON(!req->nr_phys_segments);
3680
3681 buf->sg_list = kzalloc(sz, GFP_KERNEL);
3682 if (!buf->sg_list)
3683 return -ENOMEM;
3684 sg_init_table(buf->sg_list, req->nr_phys_segments);
3685 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3686 buf->payload_len = blk_rq_bytes(req);
3687 return 0;
3688}
3689
3690
3691/**
3692 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3693 * bsg request
3694 * @shost: SCSI Host corresponding to the bsg object
3695 * @rport: (optional) FC Remote Port corresponding to the bsg object
3696 * @req: BSG request that needs a job structure
3697 */
3698static int
3699fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3700 struct request *req)
3701{
3702 struct fc_internal *i = to_fc_internal(shost->transportt);
3703 struct request *rsp = req->next_rq;
3704 struct fc_bsg_job *job;
3705 int ret;
3706
3707 BUG_ON(req->special);
3708
3709 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3710 GFP_KERNEL);
3711 if (!job)
3712 return -ENOMEM;
3713
3714 /*
3715 * Note: this is a bit silly.
3716 * The request gets formatted as a SGIO v4 ioctl request, which
3717 * then gets reformatted as a blk request, which then gets
3718 * reformatted as a fc bsg request. And on completion, we have
3719 * to wrap return results such that SGIO v4 thinks it was a scsi
3720 * status. I hope this was all worth it.
3721 */
3722
3723 req->special = job;
3724 job->shost = shost;
3725 job->rport = rport;
3726 job->req = req;
3727 if (i->f->dd_bsg_size)
3728 job->dd_data = (void *)&job[1];
3729 spin_lock_init(&job->job_lock);
3730 job->request = (struct fc_bsg_request *)req->cmd;
3731 job->request_len = req->cmd_len;
3732 job->reply = req->sense;
3733 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3734 * allocated */
3735 if (req->bio) {
3736 ret = fc_bsg_map_buffer(&job->request_payload, req);
3737 if (ret)
3738 goto failjob_rls_job;
3739 }
3740 if (rsp && rsp->bio) {
3741 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3742 if (ret)
3743 goto failjob_rls_rqst_payload;
3744 }
3745 job->job_done = fc_bsg_jobdone;
3746 if (rport)
3747 job->dev = &rport->dev;
3748 else
3749 job->dev = &shost->shost_gendev;
3750 get_device(job->dev); /* take a reference for the request */
3751
3752 job->ref_cnt = 1;
3753
3754 return 0;
3755
3756
3757failjob_rls_rqst_payload:
3758 kfree(job->request_payload.sg_list);
3759failjob_rls_job:
3760 kfree(job);
3761 return -ENOMEM;
3762}
3763
3764
3765enum fc_dispatch_result {
3766 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
3767 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
3768 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
3769};
3770
3771
3772/**
3773 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
5415907a 3774 * @q: fc host request queue
9e4f5e29
JS		 3775 * @shost: scsi host rport attached to
3776 * @job: bsg job to be processed
3777 */
3778static enum fc_dispatch_result
3779fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3780 struct fc_bsg_job *job)
3781{
3782 struct fc_internal *i = to_fc_internal(shost->transportt);
3783 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3784 int ret;
3785
3786 /* Validate the host command */
3787 switch (job->request->msgcode) {
3788 case FC_BSG_HST_ADD_RPORT:
3789 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3790 break;
3791
3792 case FC_BSG_HST_DEL_RPORT:
3793 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3794 break;
3795
3796 case FC_BSG_HST_ELS_NOLOGIN:
3797 cmdlen += sizeof(struct fc_bsg_host_els);
3798 /* there better be a xmt and rcv payloads */
3799 if ((!job->request_payload.payload_len) ||
3800 (!job->reply_payload.payload_len)) {
3801 ret = -EINVAL;
3802 goto fail_host_msg;
3803 }
3804 break;
3805
3806 case FC_BSG_HST_CT:
3807 cmdlen += sizeof(struct fc_bsg_host_ct);
3808 /* there better be xmt and rcv payloads */
3809 if ((!job->request_payload.payload_len) ||
3810 (!job->reply_payload.payload_len)) {
3811 ret = -EINVAL;
3812 goto fail_host_msg;
3813 }
3814 break;
3815
3816 case FC_BSG_HST_VENDOR:
3817 cmdlen += sizeof(struct fc_bsg_host_vendor);
3818 if ((shost->hostt->vendor_id == 0L) ||
3819 (job->request->rqst_data.h_vendor.vendor_id !=
3820 shost->hostt->vendor_id)) {
3821 ret = -ESRCH;
3822 goto fail_host_msg;
3823 }
3824 break;
3825
3826 default:
3827 ret = -EBADR;
3828 goto fail_host_msg;
3829 }
3830
3831 /* check if we really have all the request data needed */
3832 if (job->request_len < cmdlen) {
3833 ret = -ENOMSG;
3834 goto fail_host_msg;
3835 }
3836
3837 ret = i->f->bsg_request(job);
3838 if (!ret)
3839 return FC_DISPATCH_UNLOCKED;
3840
3841fail_host_msg:
3842 /* return the errno failure code as the only status */
3843 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3844 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS		 3845 job->reply->result = ret;
3846 job->reply_len = sizeof(uint32_t);
3847 fc_bsg_jobdone(job);
3848 return FC_DISPATCH_UNLOCKED;
3849}
3850
3851
3852/*
3853 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3854 * @rport: rport to be restarted
3855 */
3856static void
3857fc_bsg_goose_queue(struct fc_rport *rport)
3858{
9e4f5e29
JS		 3859 if (!rport->rqst_q)
3860 return;
3861
c21e6beb
JA		 3862 /*
3863 * This get/put dance makes no sense
3864 */
9e4f5e29 3865 get_device(&rport->dev);
c21e6beb 3866 blk_run_queue_async(rport->rqst_q);
9e4f5e29
JS		 3867 put_device(&rport->dev);
3868}
3869
9e4f5e29
JS		 3870/**
3871 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
5415907a 3872 * @q: rport request queue
9e4f5e29
JS		 3873 * @shost: scsi host rport attached to
3874 * @rport: rport request destined to
3875 * @job: bsg job to be processed
3876 */
3877static enum fc_dispatch_result
3878fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3879 struct fc_rport *rport, struct fc_bsg_job *job)
3880{
3881 struct fc_internal *i = to_fc_internal(shost->transportt);
3882 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3883 int ret;
3884
3885 /* Validate the rport command */
3886 switch (job->request->msgcode) {
3887 case FC_BSG_RPT_ELS:
3888 cmdlen += sizeof(struct fc_bsg_rport_els);
3889 goto check_bidi;
3890
3891 case FC_BSG_RPT_CT:
3892 cmdlen += sizeof(struct fc_bsg_rport_ct);
3893check_bidi:
3894 /* there better be xmt and rcv payloads */
3895 if ((!job->request_payload.payload_len) ||
3896 (!job->reply_payload.payload_len)) {
3897 ret = -EINVAL;
3898 goto fail_rport_msg;
3899 }
3900 break;
3901 default:
3902 ret = -EBADR;
3903 goto fail_rport_msg;
3904 }
3905
3906 /* check if we really have all the request data needed */
3907 if (job->request_len < cmdlen) {
3908 ret = -ENOMSG;
3909 goto fail_rport_msg;
3910 }
3911
3912 ret = i->f->bsg_request(job);
3913 if (!ret)
3914 return FC_DISPATCH_UNLOCKED;
3915
3916fail_rport_msg:
3917 /* return the errno failure code as the only status */
3918 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3919 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS		 3920 job->reply->result = ret;
3921 job->reply_len = sizeof(uint32_t);
3922 fc_bsg_jobdone(job);
3923 return FC_DISPATCH_UNLOCKED;
3924}
3925
3926
3927/**
3928 * fc_bsg_request_handler - generic handler for bsg requests
3929 * @q: request queue to manage
3930 * @shost: Scsi_Host related to the bsg object
3931 * @rport: FC remote port related to the bsg object (optional)
3932 * @dev: device structure for bsg object
3933 */
3934static void
3935fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3936 struct fc_rport *rport, struct device *dev)
3937{
3938 struct request *req;
3939 struct fc_bsg_job *job;
3940 enum fc_dispatch_result ret;
3941
3942 if (!get_device(dev))
3943 return;
3944
7eaceacc 3945 while (1) {
2bc1c59d
MC		 3946 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3947 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3948 break;
9e4f5e29
JS		 3949
3950 req = blk_fetch_request(q);
3951 if (!req)
3952 break;
3953
3954 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3955 req->errors = -ENXIO;
3956 spin_unlock_irq(q->queue_lock);
d88a714b 3957 blk_end_request_all(req, -ENXIO);
9e4f5e29
JS		 3958 spin_lock_irq(q->queue_lock);
3959 continue;
3960 }
3961
3962 spin_unlock_irq(q->queue_lock);
3963
3964 ret = fc_req_to_bsgjob(shost, rport, req);
3965 if (ret) {
3966 req->errors = ret;
d88a714b 3967 blk_end_request_all(req, ret);
9e4f5e29
JS		 3968 spin_lock_irq(q->queue_lock);
3969 continue;
3970 }
3971
3972 job = req->special;
3973
3974 /* check if we have the msgcode value at least */
3975 if (job->request_len < sizeof(uint32_t)) {
3976 BUG_ON(job->reply_len < sizeof(uint32_t));
61ec33eb 3977 job->reply->reply_payload_rcv_len = 0;
9e4f5e29
JS		 3978 job->reply->result = -ENOMSG;
3979 job->reply_len = sizeof(uint32_t);
3980 fc_bsg_jobdone(job);
3981 spin_lock_irq(q->queue_lock);
3982 continue;
3983 }
3984
3985 /* the dispatch routines will unlock the queue_lock */
3986 if (rport)
3987 ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3988 else
3989 ret = fc_bsg_host_dispatch(q, shost, job);
3990
3991 /* did dispatcher hit state that can't process any more */
3992 if (ret == FC_DISPATCH_BREAK)
3993 break;
3994
3995 /* did dispatcher had released the lock */
3996 if (ret == FC_DISPATCH_UNLOCKED)
3997 spin_lock_irq(q->queue_lock);
3998 }
3999
4000 spin_unlock_irq(q->queue_lock);
4001 put_device(dev);
4002 spin_lock_irq(q->queue_lock);
4003}
4004
4005
4006/**
4007 * fc_bsg_host_handler - handler for bsg requests for a fc host
4008 * @q: fc host request queue
4009 */
4010static void
4011fc_bsg_host_handler(struct request_queue *q)
4012{
4013 struct Scsi_Host *shost = q->queuedata;
4014
4015 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
4016}
4017
4018
4019/**
4020 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
4021 * @q: rport request queue
4022 */
4023static void
4024fc_bsg_rport_handler(struct request_queue *q)
4025{
4026 struct fc_rport *rport = q->queuedata;
4027 struct Scsi_Host *shost = rport_to_shost(rport);
4028
4029 fc_bsg_request_handler(q, shost, rport, &rport->dev);
4030}
4031
4032
4033/**
4034 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4035 * @shost: shost for fc_host
4036 * @fc_host: fc_host adding the structures to
4037 */
4038static int
4039fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4040{
4041 struct device *dev = &shost->shost_gendev;
4042 struct fc_internal *i = to_fc_internal(shost->transportt);
4043 struct request_queue *q;
4044 int err;
3c559ea8 4045 char bsg_name[20];
9e4f5e29
JS		 4046
4047 fc_host->rqst_q = NULL;
4048
4049 if (!i->f->bsg_request)
4050 return -ENOTSUPP;
4051
4052 snprintf(bsg_name, sizeof(bsg_name),
4053 "fc_host%d", shost->host_no);
4054
4055 q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
4056 if (!q) {
4057 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4058 "initialize - no request queue\n",
4059 shost->host_no);
4060 return -ENOMEM;
4061 }
4062
4063 q->queuedata = shost;
4064 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
b5c6f776 4065 blk_queue_softirq_done(q, fc_bsg_softirq_done);
9e4f5e29
JS		 4066 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4067 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4068
4069 err = bsg_register_queue(q, dev, bsg_name, NULL);
4070 if (err) {
4071 printk(KERN_ERR "fc_host%d: bsg interface failed to "
4072 "initialize - register queue\n",
4073 shost->host_no);
4074 blk_cleanup_queue(q);
4075 return err;
4076 }
4077
4078 fc_host->rqst_q = q;
4079 return 0;
4080}
4081
4082
4083/**
4084 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4085 * @shost: shost that rport is attached to
4086 * @rport: rport that the bsg hooks are being attached to
4087 */
4088static int
4089fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4090{
4091 struct device *dev = &rport->dev;
4092 struct fc_internal *i = to_fc_internal(shost->transportt);
4093 struct request_queue *q;
4094 int err;
4095
4096 rport->rqst_q = NULL;
4097
4098 if (!i->f->bsg_request)
4099 return -ENOTSUPP;
4100
4101 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4102 if (!q) {
4103 printk(KERN_ERR "%s: bsg interface failed to "
4104 "initialize - no request queue\n",
4105 dev->kobj.name);
4106 return -ENOMEM;
4107 }
4108
4109 q->queuedata = rport;
4110 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
b5c6f776 4111 blk_queue_softirq_done(q, fc_bsg_softirq_done);
9e4f5e29
JS		 4112 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4113 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4114
4115 err = bsg_register_queue(q, dev, NULL, NULL);
4116 if (err) {
4117 printk(KERN_ERR "%s: bsg interface failed to "
4118 "initialize - register queue\n",
4119 dev->kobj.name);
4120 blk_cleanup_queue(q);
4121 return err;
4122 }
4123
4124 rport->rqst_q = q;
4125 return 0;
4126}
4127
4128
4129/**
4130 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4131 * @q: the request_queue that is to be torn down.
78d16341
JS		 4132 *
4133 * Notes:
4134 * Before unregistering the queue empty any requests that are blocked
4135 *
4136 *
9e4f5e29
JS		 4137 */
4138static void
4139fc_bsg_remove(struct request_queue *q)
4140{
4141 if (q) {
4142 bsg_unregister_queue(q);
4143 blk_cleanup_queue(q);
4144 }
4145}
4146
4147
9ef3e4a4
JS		 4148/* Original Author: Martin Hicks */
4149MODULE_AUTHOR("James Smart");
1da177e4
LT		 4150MODULE_DESCRIPTION("FC Transport Attributes");
4151MODULE_LICENSE("GPL");
4152
4153module_init(fc_transport_init);
4154module_exit(fc_transport_exit);
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