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Linux 5.1.15
[linux/fpc-iii.git] / drivers / scsi / scsi_transport_fc.c
blobd7035270d274285ced0f6ee116a7921371502faf
1 /*
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 *
22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
25 * Add vports, etc
26 *
27 */
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/delay.h>
32 #include <linux/kernel.h>
33 #include <linux/bsg-lib.h>
34 #include <scsi/scsi_device.h>
35 #include <scsi/scsi_host.h>
36 #include <scsi/scsi_transport.h>
37 #include <scsi/scsi_transport_fc.h>
38 #include <scsi/scsi_cmnd.h>
39 #include <net/netlink.h>
40 #include <scsi/scsi_netlink_fc.h>
41 #include <scsi/scsi_bsg_fc.h>
42 #include "scsi_priv.h"
43
44 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
45 static void fc_vport_sched_delete(struct work_struct *work);
46 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
47 struct device *pdev, struct fc_vport_identifiers *ids,
48 struct fc_vport **vport);
49 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
50 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
51 static void fc_bsg_remove(struct request_queue *);
52 static void fc_bsg_goose_queue(struct fc_rport *);
53
54 /*
55 * Module Parameters
56 */
57
58 /*
59 * dev_loss_tmo: the default number of seconds that the FC transport
60 * should insulate the loss of a remote port.
61 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
62 */
63 static unsigned int fc_dev_loss_tmo = 60; /* seconds */
64
65 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
66 MODULE_PARM_DESC(dev_loss_tmo,
67 "Maximum number of seconds that the FC transport should"
68 " insulate the loss of a remote port. Once this value is"
69 " exceeded, the scsi target is removed. Value should be"
70 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
71 " fast_io_fail_tmo is not set.");
72
73 /*
74 * Redefine so that we can have same named attributes in the
75 * sdev/starget/host objects.
76 */
77 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
78 struct device_attribute device_attr_##_prefix##_##_name = \
79 __ATTR(_name,_mode,_show,_store)
80
81 #define fc_enum_name_search(title, table_type, table) \
82 static const char *get_fc_##title##_name(enum table_type table_key) \
83 { \
84 int i; \
85 char *name = NULL; \
86 \
87 for (i = 0; i < ARRAY_SIZE(table); i++) { \
88 if (table[i].value == table_key) { \
89 name = table[i].name; \
90 break; \
91 } \
92 } \
93 return name; \
94 }
95
96 #define fc_enum_name_match(title, table_type, table) \
97 static int get_fc_##title##_match(const char *table_key, \
98 enum table_type *value) \
99 { \
100 int i; \
101 \
102 for (i = 0; i < ARRAY_SIZE(table); i++) { \
103 if (strncmp(table_key, table[i].name, \
104 table[i].matchlen) == 0) { \
105 *value = table[i].value; \
106 return 0; /* success */ \
107 } \
108 } \
109 return 1; /* failure */ \
110 }
111
112
113 /* Convert fc_port_type values to ascii string name */
114 static struct {
115 enum fc_port_type value;
116 char *name;
117 } fc_port_type_names[] = {
118 { FC_PORTTYPE_UNKNOWN, "Unknown" },
119 { FC_PORTTYPE_OTHER, "Other" },
120 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
121 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
122 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
123 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
124 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
125 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
126 };
127 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
128 #define FC_PORTTYPE_MAX_NAMELEN 50
129
130 /* Reuse fc_port_type enum function for vport_type */
131 #define get_fc_vport_type_name get_fc_port_type_name
132
133
134 /* Convert fc_host_event_code values to ascii string name */
135 static const struct {
136 enum fc_host_event_code value;
137 char *name;
138 } fc_host_event_code_names[] = {
139 { FCH_EVT_LIP, "lip" },
140 { FCH_EVT_LINKUP, "link_up" },
141 { FCH_EVT_LINKDOWN, "link_down" },
142 { FCH_EVT_LIPRESET, "lip_reset" },
143 { FCH_EVT_RSCN, "rscn" },
144 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
145 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
146 { FCH_EVT_PORT_ONLINE, "port_online" },
147 { FCH_EVT_PORT_OFFLINE, "port_offline" },
148 { FCH_EVT_PORT_FABRIC, "port_fabric" },
149 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
150 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
151 };
152 fc_enum_name_search(host_event_code, fc_host_event_code,
153 fc_host_event_code_names)
154 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
155
156
157 /* Convert fc_port_state values to ascii string name */
158 static struct {
159 enum fc_port_state value;
160 char *name;
161 } fc_port_state_names[] = {
162 { FC_PORTSTATE_UNKNOWN, "Unknown" },
163 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
164 { FC_PORTSTATE_ONLINE, "Online" },
165 { FC_PORTSTATE_OFFLINE, "Offline" },
166 { FC_PORTSTATE_BLOCKED, "Blocked" },
167 { FC_PORTSTATE_BYPASSED, "Bypassed" },
168 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
169 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
170 { FC_PORTSTATE_ERROR, "Error" },
171 { FC_PORTSTATE_LOOPBACK, "Loopback" },
172 { FC_PORTSTATE_DELETED, "Deleted" },
173 };
174 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
175 #define FC_PORTSTATE_MAX_NAMELEN 20
176
177
178 /* Convert fc_vport_state values to ascii string name */
179 static struct {
180 enum fc_vport_state value;
181 char *name;
182 } fc_vport_state_names[] = {
183 { FC_VPORT_UNKNOWN, "Unknown" },
184 { FC_VPORT_ACTIVE, "Active" },
185 { FC_VPORT_DISABLED, "Disabled" },
186 { FC_VPORT_LINKDOWN, "Linkdown" },
187 { FC_VPORT_INITIALIZING, "Initializing" },
188 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
189 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
190 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
191 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
192 { FC_VPORT_FAILED, "VPort Failed" },
193 };
194 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
195 #define FC_VPORTSTATE_MAX_NAMELEN 24
196
197 /* Reuse fc_vport_state enum function for vport_last_state */
198 #define get_fc_vport_last_state_name get_fc_vport_state_name
199
200
201 /* Convert fc_tgtid_binding_type values to ascii string name */
202 static const struct {
203 enum fc_tgtid_binding_type value;
204 char *name;
205 int matchlen;
206 } fc_tgtid_binding_type_names[] = {
207 { FC_TGTID_BIND_NONE, "none", 4 },
208 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
209 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
210 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
211 };
212 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
213 fc_tgtid_binding_type_names)
214 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
215 fc_tgtid_binding_type_names)
216 #define FC_BINDTYPE_MAX_NAMELEN 30
217
218
219 #define fc_bitfield_name_search(title, table) \
220 static ssize_t \
221 get_fc_##title##_names(u32 table_key, char *buf) \
222 { \
223 char *prefix = ""; \
224 ssize_t len = 0; \
225 int i; \
226 \
227 for (i = 0; i < ARRAY_SIZE(table); i++) { \
228 if (table[i].value & table_key) { \
229 len += sprintf(buf + len, "%s%s", \
230 prefix, table[i].name); \
231 prefix = ", "; \
232 } \
233 } \
234 len += sprintf(buf + len, "\n"); \
235 return len; \
236 }
237
238
239 /* Convert FC_COS bit values to ascii string name */
240 static const struct {
241 u32 value;
242 char *name;
243 } fc_cos_names[] = {
244 { FC_COS_CLASS1, "Class 1" },
245 { FC_COS_CLASS2, "Class 2" },
246 { FC_COS_CLASS3, "Class 3" },
247 { FC_COS_CLASS4, "Class 4" },
248 { FC_COS_CLASS6, "Class 6" },
249 };
250 fc_bitfield_name_search(cos, fc_cos_names)
251
252
253 /* Convert FC_PORTSPEED bit values to ascii string name */
254 static const struct {
255 u32 value;
256 char *name;
257 } fc_port_speed_names[] = {
258 { FC_PORTSPEED_1GBIT, "1 Gbit" },
259 { FC_PORTSPEED_2GBIT, "2 Gbit" },
260 { FC_PORTSPEED_4GBIT, "4 Gbit" },
261 { FC_PORTSPEED_10GBIT, "10 Gbit" },
262 { FC_PORTSPEED_8GBIT, "8 Gbit" },
263 { FC_PORTSPEED_16GBIT, "16 Gbit" },
264 { FC_PORTSPEED_32GBIT, "32 Gbit" },
265 { FC_PORTSPEED_20GBIT, "20 Gbit" },
266 { FC_PORTSPEED_40GBIT, "40 Gbit" },
267 { FC_PORTSPEED_50GBIT, "50 Gbit" },
268 { FC_PORTSPEED_100GBIT, "100 Gbit" },
269 { FC_PORTSPEED_25GBIT, "25 Gbit" },
270 { FC_PORTSPEED_64GBIT, "64 Gbit" },
271 { FC_PORTSPEED_128GBIT, "128 Gbit" },
272 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
273 };
274 fc_bitfield_name_search(port_speed, fc_port_speed_names)
275
276
277 static int
278 show_fc_fc4s (char *buf, u8 *fc4_list)
279 {
280 int i, len=0;
281
282 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
283 len += sprintf(buf + len , "0x%02x ", *fc4_list);
284 len += sprintf(buf + len, "\n");
285 return len;
286 }
287
288
289 /* Convert FC_PORT_ROLE bit values to ascii string name */
290 static const struct {
291 u32 value;
292 char *name;
293 } fc_port_role_names[] = {
294 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
295 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
296 { FC_PORT_ROLE_IP_PORT, "IP Port" },
297 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" },
298 };
299 fc_bitfield_name_search(port_roles, fc_port_role_names)
300
301 /*
302 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
303 */
304 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
305 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
306 #define FC_FPORT_PORTID 0x00000e
307 #define FC_FABCTLR_PORTID 0x00000d
308 #define FC_DIRSRVR_PORTID 0x00000c
309 #define FC_TIMESRVR_PORTID 0x00000b
310 #define FC_MGMTSRVR_PORTID 0x00000a
311
312
313 static void fc_timeout_deleted_rport(struct work_struct *work);
314 static void fc_timeout_fail_rport_io(struct work_struct *work);
315 static void fc_scsi_scan_rport(struct work_struct *work);
316
317 /*
318 * Attribute counts pre object type...
319 * Increase these values if you add attributes
320 */
321 #define FC_STARGET_NUM_ATTRS 3
322 #define FC_RPORT_NUM_ATTRS 10
323 #define FC_VPORT_NUM_ATTRS 9
324 #define FC_HOST_NUM_ATTRS 29
325
326 struct fc_internal {
327 struct scsi_transport_template t;
328 struct fc_function_template *f;
329
330 /*
331 * For attributes : each object has :
332 * An array of the actual attributes structures
333 * An array of null-terminated pointers to the attribute
334 * structures - used for mid-layer interaction.
335 *
336 * The attribute containers for the starget and host are are
337 * part of the midlayer. As the remote port is specific to the
338 * fc transport, we must provide the attribute container.
339 */
340 struct device_attribute private_starget_attrs[
341 FC_STARGET_NUM_ATTRS];
342 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
343
344 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
345 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
346
347 struct transport_container rport_attr_cont;
348 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
349 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
350
351 struct transport_container vport_attr_cont;
352 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
353 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
354 };
355
356 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
357
358 static int fc_target_setup(struct transport_container *tc, struct device *dev,
359 struct device *cdev)
360 {
361 struct scsi_target *starget = to_scsi_target(dev);
362 struct fc_rport *rport = starget_to_rport(starget);
363
364 /*
365 * if parent is remote port, use values from remote port.
366 * Otherwise, this host uses the fc_transport, but not the
367 * remote port interface. As such, initialize to known non-values.
368 */
369 if (rport) {
370 fc_starget_node_name(starget) = rport->node_name;
371 fc_starget_port_name(starget) = rport->port_name;
372 fc_starget_port_id(starget) = rport->port_id;
373 } else {
374 fc_starget_node_name(starget) = -1;
375 fc_starget_port_name(starget) = -1;
376 fc_starget_port_id(starget) = -1;
377 }
378
379 return 0;
380 }
381
382 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
383 "fc_transport",
384 fc_target_setup,
385 NULL,
386 NULL);
387
388 static int fc_host_setup(struct transport_container *tc, struct device *dev,
389 struct device *cdev)
390 {
391 struct Scsi_Host *shost = dev_to_shost(dev);
392 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
393
394 /*
395 * Set default values easily detected by the midlayer as
396 * failure cases. The scsi lldd is responsible for initializing
397 * all transport attributes to valid values per host.
398 */
399 fc_host->node_name = -1;
400 fc_host->port_name = -1;
401 fc_host->permanent_port_name = -1;
402 fc_host->supported_classes = FC_COS_UNSPECIFIED;
403 memset(fc_host->supported_fc4s, 0,
404 sizeof(fc_host->supported_fc4s));
405 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
406 fc_host->maxframe_size = -1;
407 fc_host->max_npiv_vports = 0;
408 memset(fc_host->serial_number, 0,
409 sizeof(fc_host->serial_number));
410 memset(fc_host->manufacturer, 0,
411 sizeof(fc_host->manufacturer));
412 memset(fc_host->model, 0,
413 sizeof(fc_host->model));
414 memset(fc_host->model_description, 0,
415 sizeof(fc_host->model_description));
416 memset(fc_host->hardware_version, 0,
417 sizeof(fc_host->hardware_version));
418 memset(fc_host->driver_version, 0,
419 sizeof(fc_host->driver_version));
420 memset(fc_host->firmware_version, 0,
421 sizeof(fc_host->firmware_version));
422 memset(fc_host->optionrom_version, 0,
423 sizeof(fc_host->optionrom_version));
424
425 fc_host->port_id = -1;
426 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
427 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
428 memset(fc_host->active_fc4s, 0,
429 sizeof(fc_host->active_fc4s));
430 fc_host->speed = FC_PORTSPEED_UNKNOWN;
431 fc_host->fabric_name = -1;
432 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
433 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
434
435 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
436
437 INIT_LIST_HEAD(&fc_host->rports);
438 INIT_LIST_HEAD(&fc_host->rport_bindings);
439 INIT_LIST_HEAD(&fc_host->vports);
440 fc_host->next_rport_number = 0;
441 fc_host->next_target_id = 0;
442 fc_host->next_vport_number = 0;
443 fc_host->npiv_vports_inuse = 0;
444
445 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
446 "fc_wq_%d", shost->host_no);
447 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
448 if (!fc_host->work_q)
449 return -ENOMEM;
450
451 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
452 snprintf(fc_host->devloss_work_q_name,
453 sizeof(fc_host->devloss_work_q_name),
454 "fc_dl_%d", shost->host_no);
455 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
456 fc_host->devloss_work_q_name);
457 if (!fc_host->devloss_work_q) {
458 destroy_workqueue(fc_host->work_q);
459 fc_host->work_q = NULL;
460 return -ENOMEM;
461 }
462
463 fc_bsg_hostadd(shost, fc_host);
464 /* ignore any bsg add error - we just can't do sgio */
465
466 return 0;
467 }
468
469 static int fc_host_remove(struct transport_container *tc, struct device *dev,
470 struct device *cdev)
471 {
472 struct Scsi_Host *shost = dev_to_shost(dev);
473 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
474
475 fc_bsg_remove(fc_host->rqst_q);
476 return 0;
477 }
478
479 static DECLARE_TRANSPORT_CLASS(fc_host_class,
480 "fc_host",
481 fc_host_setup,
482 fc_host_remove,
483 NULL);
484
485 /*
486 * Setup and Remove actions for remote ports are handled
487 * in the service functions below.
488 */
489 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
490 "fc_remote_ports",
491 NULL,
492 NULL,
493 NULL);
494
495 /*
496 * Setup and Remove actions for virtual ports are handled
497 * in the service functions below.
498 */
499 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
500 "fc_vports",
501 NULL,
502 NULL,
503 NULL);
504
505 /*
506 * Netlink Infrastructure
507 */
508
509 static atomic_t fc_event_seq;
510
511 /**
512 * fc_get_event_number - Obtain the next sequential FC event number
513 *
514 * Notes:
515 * We could have inlined this, but it would have required fc_event_seq to
516 * be exposed. For now, live with the subroutine call.
517 * Atomic used to avoid lock/unlock...
518 */
519 u32
520 fc_get_event_number(void)
521 {
522 return atomic_add_return(1, &fc_event_seq);
523 }
524 EXPORT_SYMBOL(fc_get_event_number);
525
526
527 /**
528 * fc_host_post_event - called to post an even on an fc_host.
529 * @shost: host the event occurred on
530 * @event_number: fc event number obtained from get_fc_event_number()
531 * @event_code: fc_host event being posted
532 * @event_data: 32bits of data for the event being posted
533 *
534 * Notes:
535 * This routine assumes no locks are held on entry.
536 */
537 void
538 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
539 enum fc_host_event_code event_code, u32 event_data)
540 {
541 struct sk_buff *skb;
542 struct nlmsghdr *nlh;
543 struct fc_nl_event *event;
544 const char *name;
545 u32 len;
546 int err;
547
548 if (!scsi_nl_sock) {
549 err = -ENOENT;
550 goto send_fail;
551 }
552
553 len = FC_NL_MSGALIGN(sizeof(*event));
554
555 skb = nlmsg_new(len, GFP_KERNEL);
556 if (!skb) {
557 err = -ENOBUFS;
558 goto send_fail;
559 }
560
561 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
562 if (!nlh) {
563 err = -ENOBUFS;
564 goto send_fail_skb;
565 }
566 event = nlmsg_data(nlh);
567
568 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
569 FC_NL_ASYNC_EVENT, len);
570 event->seconds = ktime_get_real_seconds();
571 event->vendor_id = 0;
572 event->host_no = shost->host_no;
573 event->event_datalen = sizeof(u32); /* bytes */
574 event->event_num = event_number;
575 event->event_code = event_code;
576 event->event_data = event_data;
577
578 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
579 GFP_KERNEL);
580 return;
581
582 send_fail_skb:
583 kfree_skb(skb);
584 send_fail:
585 name = get_fc_host_event_code_name(event_code);
586 printk(KERN_WARNING
587 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
588 __func__, shost->host_no,
589 (name) ? name : "<unknown>", event_data, err);
590 return;
591 }
592 EXPORT_SYMBOL(fc_host_post_event);
593
594
595 /**
596 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
597 * @shost: host the event occurred on
598 * @event_number: fc event number obtained from get_fc_event_number()
599 * @data_len: amount, in bytes, of vendor unique data
600 * @data_buf: pointer to vendor unique data
601 * @vendor_id: Vendor id
602 *
603 * Notes:
604 * This routine assumes no locks are held on entry.
605 */
606 void
607 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
608 u32 data_len, char * data_buf, u64 vendor_id)
609 {
610 struct sk_buff *skb;
611 struct nlmsghdr *nlh;
612 struct fc_nl_event *event;
613 u32 len;
614 int err;
615
616 if (!scsi_nl_sock) {
617 err = -ENOENT;
618 goto send_vendor_fail;
619 }
620
621 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
622
623 skb = nlmsg_new(len, GFP_KERNEL);
624 if (!skb) {
625 err = -ENOBUFS;
626 goto send_vendor_fail;
627 }
628
629 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
630 if (!nlh) {
631 err = -ENOBUFS;
632 goto send_vendor_fail_skb;
633 }
634 event = nlmsg_data(nlh);
635
636 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
637 FC_NL_ASYNC_EVENT, len);
638 event->seconds = ktime_get_real_seconds();
639 event->vendor_id = vendor_id;
640 event->host_no = shost->host_no;
641 event->event_datalen = data_len; /* bytes */
642 event->event_num = event_number;
643 event->event_code = FCH_EVT_VENDOR_UNIQUE;
644 memcpy(&event->event_data, data_buf, data_len);
645
646 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
647 GFP_KERNEL);
648 return;
649
650 send_vendor_fail_skb:
651 kfree_skb(skb);
652 send_vendor_fail:
653 printk(KERN_WARNING
654 "%s: Dropped Event : host %d vendor_unique - err %d\n",
655 __func__, shost->host_no, err);
656 return;
657 }
658 EXPORT_SYMBOL(fc_host_post_vendor_event);
659
660
661
662 static __init int fc_transport_init(void)
663 {
664 int error;
665
666 atomic_set(&fc_event_seq, 0);
667
668 error = transport_class_register(&fc_host_class);
669 if (error)
670 return error;
671 error = transport_class_register(&fc_vport_class);
672 if (error)
673 goto unreg_host_class;
674 error = transport_class_register(&fc_rport_class);
675 if (error)
676 goto unreg_vport_class;
677 error = transport_class_register(&fc_transport_class);
678 if (error)
679 goto unreg_rport_class;
680 return 0;
681
682 unreg_rport_class:
683 transport_class_unregister(&fc_rport_class);
684 unreg_vport_class:
685 transport_class_unregister(&fc_vport_class);
686 unreg_host_class:
687 transport_class_unregister(&fc_host_class);
688 return error;
689 }
690
691 static void __exit fc_transport_exit(void)
692 {
693 transport_class_unregister(&fc_transport_class);
694 transport_class_unregister(&fc_rport_class);
695 transport_class_unregister(&fc_host_class);
696 transport_class_unregister(&fc_vport_class);
697 }
698
699 /*
700 * FC Remote Port Attribute Management
701 */
702
703 #define fc_rport_show_function(field, format_string, sz, cast) \
704 static ssize_t \
705 show_fc_rport_##field (struct device *dev, \
706 struct device_attribute *attr, char *buf) \
707 { \
708 struct fc_rport *rport = transport_class_to_rport(dev); \
709 struct Scsi_Host *shost = rport_to_shost(rport); \
710 struct fc_internal *i = to_fc_internal(shost->transportt); \
711 if ((i->f->get_rport_##field) && \
712 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
713 (rport->port_state == FC_PORTSTATE_DELETED) || \
714 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
715 i->f->get_rport_##field(rport); \
716 return snprintf(buf, sz, format_string, cast rport->field); \
717 }
718
719 #define fc_rport_store_function(field) \
720 static ssize_t \
721 store_fc_rport_##field(struct device *dev, \
722 struct device_attribute *attr, \
723 const char *buf, size_t count) \
724 { \
725 int val; \
726 struct fc_rport *rport = transport_class_to_rport(dev); \
727 struct Scsi_Host *shost = rport_to_shost(rport); \
728 struct fc_internal *i = to_fc_internal(shost->transportt); \
729 char *cp; \
730 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
731 (rport->port_state == FC_PORTSTATE_DELETED) || \
732 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
733 return -EBUSY; \
734 val = simple_strtoul(buf, &cp, 0); \
735 if (*cp && (*cp != '\n')) \
736 return -EINVAL; \
737 i->f->set_rport_##field(rport, val); \
738 return count; \
739 }
740
741 #define fc_rport_rd_attr(field, format_string, sz) \
742 fc_rport_show_function(field, format_string, sz, ) \
743 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
744 show_fc_rport_##field, NULL)
745
746 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
747 fc_rport_show_function(field, format_string, sz, (cast)) \
748 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
749 show_fc_rport_##field, NULL)
750
751 #define fc_rport_rw_attr(field, format_string, sz) \
752 fc_rport_show_function(field, format_string, sz, ) \
753 fc_rport_store_function(field) \
754 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
755 show_fc_rport_##field, \
756 store_fc_rport_##field)
757
758
759 #define fc_private_rport_show_function(field, format_string, sz, cast) \
760 static ssize_t \
761 show_fc_rport_##field (struct device *dev, \
762 struct device_attribute *attr, char *buf) \
763 { \
764 struct fc_rport *rport = transport_class_to_rport(dev); \
765 return snprintf(buf, sz, format_string, cast rport->field); \
766 }
767
768 #define fc_private_rport_rd_attr(field, format_string, sz) \
769 fc_private_rport_show_function(field, format_string, sz, ) \
770 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
771 show_fc_rport_##field, NULL)
772
773 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
774 fc_private_rport_show_function(field, format_string, sz, (cast)) \
775 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
776 show_fc_rport_##field, NULL)
777
778
779 #define fc_private_rport_rd_enum_attr(title, maxlen) \
780 static ssize_t \
781 show_fc_rport_##title (struct device *dev, \
782 struct device_attribute *attr, char *buf) \
783 { \
784 struct fc_rport *rport = transport_class_to_rport(dev); \
785 const char *name; \
786 name = get_fc_##title##_name(rport->title); \
787 if (!name) \
788 return -EINVAL; \
789 return snprintf(buf, maxlen, "%s\n", name); \
790 } \
791 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
792 show_fc_rport_##title, NULL)
793
794
795 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
796 i->private_rport_attrs[count] = device_attr_rport_##field; \
797 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
798 i->private_rport_attrs[count].store = NULL; \
799 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
800 if (i->f->show_rport_##field) \
801 count++
802
803 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
804 i->private_rport_attrs[count] = device_attr_rport_##field; \
805 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
806 i->private_rport_attrs[count].store = NULL; \
807 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
808 count++
809
810 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
811 i->private_rport_attrs[count] = device_attr_rport_##field; \
812 if (!i->f->set_rport_##field) { \
813 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
814 i->private_rport_attrs[count].store = NULL; \
815 } \
816 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
817 if (i->f->show_rport_##field) \
818 count++
819
820 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
821 { \
822 i->private_rport_attrs[count] = device_attr_rport_##field; \
823 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
824 count++; \
825 }
826
827
828 /* The FC Transport Remote Port Attributes: */
829
830 /* Fixed Remote Port Attributes */
831
832 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
833
834 static ssize_t
835 show_fc_rport_supported_classes (struct device *dev,
836 struct device_attribute *attr, char *buf)
837 {
838 struct fc_rport *rport = transport_class_to_rport(dev);
839 if (rport->supported_classes == FC_COS_UNSPECIFIED)
840 return snprintf(buf, 20, "unspecified\n");
841 return get_fc_cos_names(rport->supported_classes, buf);
842 }
843 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
844 show_fc_rport_supported_classes, NULL);
845
846 /* Dynamic Remote Port Attributes */
847
848 /*
849 * dev_loss_tmo attribute
850 */
851 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
852 {
853 char *cp;
854
855 *val = simple_strtoul(buf, &cp, 0);
856 if (*cp && (*cp != '\n'))
857 return -EINVAL;
858 /*
859 * Check for overflow; dev_loss_tmo is u32
860 */
861 if (*val > UINT_MAX)
862 return -EINVAL;
863
864 return 0;
865 }
866
867 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
868 unsigned long val)
869 {
870 struct Scsi_Host *shost = rport_to_shost(rport);
871 struct fc_internal *i = to_fc_internal(shost->transportt);
872
873 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
874 (rport->port_state == FC_PORTSTATE_DELETED) ||
875 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
876 return -EBUSY;
877 /*
878 * Check for overflow; dev_loss_tmo is u32
879 */
880 if (val > UINT_MAX)
881 return -EINVAL;
882
883 /*
884 * If fast_io_fail is off we have to cap
885 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
886 */
887 if (rport->fast_io_fail_tmo == -1 &&
888 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
889 return -EINVAL;
890
891 i->f->set_rport_dev_loss_tmo(rport, val);
892 return 0;
893 }
894
895 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
896 static ssize_t
897 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
898 const char *buf, size_t count)
899 {
900 struct fc_rport *rport = transport_class_to_rport(dev);
901 unsigned long val;
902 int rc;
903
904 rc = fc_str_to_dev_loss(buf, &val);
905 if (rc)
906 return rc;
907
908 rc = fc_rport_set_dev_loss_tmo(rport, val);
909 if (rc)
910 return rc;
911 return count;
912 }
913 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
914 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
915
916
917 /* Private Remote Port Attributes */
918
919 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
920 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
921 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
922
923 static ssize_t
924 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
925 char *buf)
926 {
927 struct fc_rport *rport = transport_class_to_rport(dev);
928
929 /* identify any roles that are port_id specific */
930 if ((rport->port_id != -1) &&
931 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
932 FC_WELLKNOWN_PORTID_MASK) {
933 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
934 case FC_FPORT_PORTID:
935 return snprintf(buf, 30, "Fabric Port\n");
936 case FC_FABCTLR_PORTID:
937 return snprintf(buf, 30, "Fabric Controller\n");
938 case FC_DIRSRVR_PORTID:
939 return snprintf(buf, 30, "Directory Server\n");
940 case FC_TIMESRVR_PORTID:
941 return snprintf(buf, 30, "Time Server\n");
942 case FC_MGMTSRVR_PORTID:
943 return snprintf(buf, 30, "Management Server\n");
944 default:
945 return snprintf(buf, 30, "Unknown Fabric Entity\n");
946 }
947 } else {
948 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
949 return snprintf(buf, 20, "unknown\n");
950 return get_fc_port_roles_names(rport->roles, buf);
951 }
952 }
953 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
954 show_fc_rport_roles, NULL);
955
956 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
957 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
958
959 /*
960 * fast_io_fail_tmo attribute
961 */
962 static ssize_t
963 show_fc_rport_fast_io_fail_tmo (struct device *dev,
964 struct device_attribute *attr, char *buf)
965 {
966 struct fc_rport *rport = transport_class_to_rport(dev);
967
968 if (rport->fast_io_fail_tmo == -1)
969 return snprintf(buf, 5, "off\n");
970 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
971 }
972
973 static ssize_t
974 store_fc_rport_fast_io_fail_tmo(struct device *dev,
975 struct device_attribute *attr, const char *buf,
976 size_t count)
977 {
978 int val;
979 char *cp;
980 struct fc_rport *rport = transport_class_to_rport(dev);
981
982 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
983 (rport->port_state == FC_PORTSTATE_DELETED) ||
984 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
985 return -EBUSY;
986 if (strncmp(buf, "off", 3) == 0)
987 rport->fast_io_fail_tmo = -1;
988 else {
989 val = simple_strtoul(buf, &cp, 0);
990 if ((*cp && (*cp != '\n')) || (val < 0))
991 return -EINVAL;
992 /*
993 * Cap fast_io_fail by dev_loss_tmo or
994 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
995 */
996 if ((val >= rport->dev_loss_tmo) ||
997 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
998 return -EINVAL;
999
1000 rport->fast_io_fail_tmo = val;
1001 }
1002 return count;
1003 }
1004 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1005 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1006
1007
1008 /*
1009 * FC SCSI Target Attribute Management
1010 */
1011
1012 /*
1013 * Note: in the target show function we recognize when the remote
1014 * port is in the hierarchy and do not allow the driver to get
1015 * involved in sysfs functions. The driver only gets involved if
1016 * it's the "old" style that doesn't use rports.
1017 */
1018 #define fc_starget_show_function(field, format_string, sz, cast) \
1019 static ssize_t \
1020 show_fc_starget_##field (struct device *dev, \
1021 struct device_attribute *attr, char *buf) \
1022 { \
1023 struct scsi_target *starget = transport_class_to_starget(dev); \
1024 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1025 struct fc_internal *i = to_fc_internal(shost->transportt); \
1026 struct fc_rport *rport = starget_to_rport(starget); \
1027 if (rport) \
1028 fc_starget_##field(starget) = rport->field; \
1029 else if (i->f->get_starget_##field) \
1030 i->f->get_starget_##field(starget); \
1031 return snprintf(buf, sz, format_string, \
1032 cast fc_starget_##field(starget)); \
1033 }
1034
1035 #define fc_starget_rd_attr(field, format_string, sz) \
1036 fc_starget_show_function(field, format_string, sz, ) \
1037 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1038 show_fc_starget_##field, NULL)
1039
1040 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1041 fc_starget_show_function(field, format_string, sz, (cast)) \
1042 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1043 show_fc_starget_##field, NULL)
1044
1045 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
1046 i->private_starget_attrs[count] = device_attr_starget_##field; \
1047 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1048 i->private_starget_attrs[count].store = NULL; \
1049 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1050 if (i->f->show_starget_##field) \
1051 count++
1052
1053 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
1054 i->private_starget_attrs[count] = device_attr_starget_##field; \
1055 if (!i->f->set_starget_##field) { \
1056 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1057 i->private_starget_attrs[count].store = NULL; \
1058 } \
1059 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1060 if (i->f->show_starget_##field) \
1061 count++
1062
1063 /* The FC Transport SCSI Target Attributes: */
1064 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1065 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1066 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1067
1068
1069 /*
1070 * FC Virtual Port Attribute Management
1071 */
1072
1073 #define fc_vport_show_function(field, format_string, sz, cast) \
1074 static ssize_t \
1075 show_fc_vport_##field (struct device *dev, \
1076 struct device_attribute *attr, char *buf) \
1077 { \
1078 struct fc_vport *vport = transport_class_to_vport(dev); \
1079 struct Scsi_Host *shost = vport_to_shost(vport); \
1080 struct fc_internal *i = to_fc_internal(shost->transportt); \
1081 if ((i->f->get_vport_##field) && \
1082 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1083 i->f->get_vport_##field(vport); \
1084 return snprintf(buf, sz, format_string, cast vport->field); \
1085 }
1086
1087 #define fc_vport_store_function(field) \
1088 static ssize_t \
1089 store_fc_vport_##field(struct device *dev, \
1090 struct device_attribute *attr, \
1091 const char *buf, size_t count) \
1092 { \
1093 int val; \
1094 struct fc_vport *vport = transport_class_to_vport(dev); \
1095 struct Scsi_Host *shost = vport_to_shost(vport); \
1096 struct fc_internal *i = to_fc_internal(shost->transportt); \
1097 char *cp; \
1098 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1099 return -EBUSY; \
1100 val = simple_strtoul(buf, &cp, 0); \
1101 if (*cp && (*cp != '\n')) \
1102 return -EINVAL; \
1103 i->f->set_vport_##field(vport, val); \
1104 return count; \
1105 }
1106
1107 #define fc_vport_store_str_function(field, slen) \
1108 static ssize_t \
1109 store_fc_vport_##field(struct device *dev, \
1110 struct device_attribute *attr, \
1111 const char *buf, size_t count) \
1112 { \
1113 struct fc_vport *vport = transport_class_to_vport(dev); \
1114 struct Scsi_Host *shost = vport_to_shost(vport); \
1115 struct fc_internal *i = to_fc_internal(shost->transportt); \
1116 unsigned int cnt=count; \
1117 \
1118 /* count may include a LF at end of string */ \
1119 if (buf[cnt-1] == '\n') \
1120 cnt--; \
1121 if (cnt > ((slen) - 1)) \
1122 return -EINVAL; \
1123 memcpy(vport->field, buf, cnt); \
1124 i->f->set_vport_##field(vport); \
1125 return count; \
1126 }
1127
1128 #define fc_vport_rd_attr(field, format_string, sz) \
1129 fc_vport_show_function(field, format_string, sz, ) \
1130 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1131 show_fc_vport_##field, NULL)
1132
1133 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1134 fc_vport_show_function(field, format_string, sz, (cast)) \
1135 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1136 show_fc_vport_##field, NULL)
1137
1138 #define fc_vport_rw_attr(field, format_string, sz) \
1139 fc_vport_show_function(field, format_string, sz, ) \
1140 fc_vport_store_function(field) \
1141 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1142 show_fc_vport_##field, \
1143 store_fc_vport_##field)
1144
1145 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1146 static ssize_t \
1147 show_fc_vport_##field (struct device *dev, \
1148 struct device_attribute *attr, char *buf) \
1149 { \
1150 struct fc_vport *vport = transport_class_to_vport(dev); \
1151 return snprintf(buf, sz, format_string, cast vport->field); \
1152 }
1153
1154 #define fc_private_vport_store_u32_function(field) \
1155 static ssize_t \
1156 store_fc_vport_##field(struct device *dev, \
1157 struct device_attribute *attr, \
1158 const char *buf, size_t count) \
1159 { \
1160 u32 val; \
1161 struct fc_vport *vport = transport_class_to_vport(dev); \
1162 char *cp; \
1163 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1164 return -EBUSY; \
1165 val = simple_strtoul(buf, &cp, 0); \
1166 if (*cp && (*cp != '\n')) \
1167 return -EINVAL; \
1168 vport->field = val; \
1169 return count; \
1170 }
1171
1172
1173 #define fc_private_vport_rd_attr(field, format_string, sz) \
1174 fc_private_vport_show_function(field, format_string, sz, ) \
1175 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1176 show_fc_vport_##field, NULL)
1177
1178 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1179 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1180 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1181 show_fc_vport_##field, NULL)
1182
1183 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1184 fc_private_vport_show_function(field, format_string, sz, ) \
1185 fc_private_vport_store_u32_function(field) \
1186 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1187 show_fc_vport_##field, \
1188 store_fc_vport_##field)
1189
1190
1191 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1192 static ssize_t \
1193 show_fc_vport_##title (struct device *dev, \
1194 struct device_attribute *attr, \
1195 char *buf) \
1196 { \
1197 struct fc_vport *vport = transport_class_to_vport(dev); \
1198 const char *name; \
1199 name = get_fc_##title##_name(vport->title); \
1200 if (!name) \
1201 return -EINVAL; \
1202 return snprintf(buf, maxlen, "%s\n", name); \
1203 } \
1204 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1205 show_fc_vport_##title, NULL)
1206
1207
1208 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1209 i->private_vport_attrs[count] = device_attr_vport_##field; \
1210 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1211 i->private_vport_attrs[count].store = NULL; \
1212 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1213 if (i->f->get_##field) \
1214 count++
1215 /* NOTE: Above MACRO differs: checks function not show bit */
1216
1217 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1218 i->private_vport_attrs[count] = device_attr_vport_##field; \
1219 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1220 i->private_vport_attrs[count].store = NULL; \
1221 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1222 count++
1223
1224 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1225 i->private_vport_attrs[count] = device_attr_vport_##field; \
1226 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1227 if (i->f->field) \
1228 count++
1229 /* NOTE: Above MACRO differs: checks function */
1230
1231 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1232 i->private_vport_attrs[count] = device_attr_vport_##field; \
1233 if (!i->f->set_vport_##field) { \
1234 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1235 i->private_vport_attrs[count].store = NULL; \
1236 } \
1237 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1238 count++
1239 /* NOTE: Above MACRO differs: does not check show bit */
1240
1241 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1242 { \
1243 i->private_vport_attrs[count] = device_attr_vport_##field; \
1244 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1245 count++; \
1246 }
1247
1248
1249 /* The FC Transport Virtual Port Attributes: */
1250
1251 /* Fixed Virtual Port Attributes */
1252
1253 /* Dynamic Virtual Port Attributes */
1254
1255 /* Private Virtual Port Attributes */
1256
1257 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1258 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1259 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1260 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1261
1262 static ssize_t
1263 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1264 char *buf)
1265 {
1266 struct fc_vport *vport = transport_class_to_vport(dev);
1267
1268 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1269 return snprintf(buf, 20, "unknown\n");
1270 return get_fc_port_roles_names(vport->roles, buf);
1271 }
1272 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1273
1274 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1275
1276 fc_private_vport_show_function(symbolic_name, "%s\n",
1277 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1278 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1279 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1280 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1281
1282 static ssize_t
1283 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1284 const char *buf, size_t count)
1285 {
1286 struct fc_vport *vport = transport_class_to_vport(dev);
1287 struct Scsi_Host *shost = vport_to_shost(vport);
1288 unsigned long flags;
1289
1290 spin_lock_irqsave(shost->host_lock, flags);
1291 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) {
1292 spin_unlock_irqrestore(shost->host_lock, flags);
1293 return -EBUSY;
1294 }
1295 vport->flags |= FC_VPORT_DELETING;
1296 spin_unlock_irqrestore(shost->host_lock, flags);
1297
1298 fc_queue_work(shost, &vport->vport_delete_work);
1299 return count;
1300 }
1301 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1302 NULL, store_fc_vport_delete);
1303
1304
1305 /*
1306 * Enable/Disable vport
1307 * Write "1" to disable, write "0" to enable
1308 */
1309 static ssize_t
1310 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1311 const char *buf,
1312 size_t count)
1313 {
1314 struct fc_vport *vport = transport_class_to_vport(dev);
1315 struct Scsi_Host *shost = vport_to_shost(vport);
1316 struct fc_internal *i = to_fc_internal(shost->transportt);
1317 int stat;
1318
1319 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1320 return -EBUSY;
1321
1322 if (*buf == '0') {
1323 if (vport->vport_state != FC_VPORT_DISABLED)
1324 return -EALREADY;
1325 } else if (*buf == '1') {
1326 if (vport->vport_state == FC_VPORT_DISABLED)
1327 return -EALREADY;
1328 } else
1329 return -EINVAL;
1330
1331 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1332 return stat ? stat : count;
1333 }
1334 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1335 NULL, store_fc_vport_disable);
1336
1337
1338 /*
1339 * Host Attribute Management
1340 */
1341
1342 #define fc_host_show_function(field, format_string, sz, cast) \
1343 static ssize_t \
1344 show_fc_host_##field (struct device *dev, \
1345 struct device_attribute *attr, char *buf) \
1346 { \
1347 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1348 struct fc_internal *i = to_fc_internal(shost->transportt); \
1349 if (i->f->get_host_##field) \
1350 i->f->get_host_##field(shost); \
1351 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1352 }
1353
1354 #define fc_host_store_function(field) \
1355 static ssize_t \
1356 store_fc_host_##field(struct device *dev, \
1357 struct device_attribute *attr, \
1358 const char *buf, size_t count) \
1359 { \
1360 int val; \
1361 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1362 struct fc_internal *i = to_fc_internal(shost->transportt); \
1363 char *cp; \
1364 \
1365 val = simple_strtoul(buf, &cp, 0); \
1366 if (*cp && (*cp != '\n')) \
1367 return -EINVAL; \
1368 i->f->set_host_##field(shost, val); \
1369 return count; \
1370 }
1371
1372 #define fc_host_store_str_function(field, slen) \
1373 static ssize_t \
1374 store_fc_host_##field(struct device *dev, \
1375 struct device_attribute *attr, \
1376 const char *buf, size_t count) \
1377 { \
1378 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1379 struct fc_internal *i = to_fc_internal(shost->transportt); \
1380 unsigned int cnt=count; \
1381 \
1382 /* count may include a LF at end of string */ \
1383 if (buf[cnt-1] == '\n') \
1384 cnt--; \
1385 if (cnt > ((slen) - 1)) \
1386 return -EINVAL; \
1387 memcpy(fc_host_##field(shost), buf, cnt); \
1388 i->f->set_host_##field(shost); \
1389 return count; \
1390 }
1391
1392 #define fc_host_rd_attr(field, format_string, sz) \
1393 fc_host_show_function(field, format_string, sz, ) \
1394 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1395 show_fc_host_##field, NULL)
1396
1397 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1398 fc_host_show_function(field, format_string, sz, (cast)) \
1399 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1400 show_fc_host_##field, NULL)
1401
1402 #define fc_host_rw_attr(field, format_string, sz) \
1403 fc_host_show_function(field, format_string, sz, ) \
1404 fc_host_store_function(field) \
1405 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1406 show_fc_host_##field, \
1407 store_fc_host_##field)
1408
1409 #define fc_host_rd_enum_attr(title, maxlen) \
1410 static ssize_t \
1411 show_fc_host_##title (struct device *dev, \
1412 struct device_attribute *attr, char *buf) \
1413 { \
1414 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1415 struct fc_internal *i = to_fc_internal(shost->transportt); \
1416 const char *name; \
1417 if (i->f->get_host_##title) \
1418 i->f->get_host_##title(shost); \
1419 name = get_fc_##title##_name(fc_host_##title(shost)); \
1420 if (!name) \
1421 return -EINVAL; \
1422 return snprintf(buf, maxlen, "%s\n", name); \
1423 } \
1424 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1425
1426 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1427 i->private_host_attrs[count] = device_attr_host_##field; \
1428 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1429 i->private_host_attrs[count].store = NULL; \
1430 i->host_attrs[count] = &i->private_host_attrs[count]; \
1431 if (i->f->show_host_##field) \
1432 count++
1433
1434 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1435 i->private_host_attrs[count] = device_attr_host_##field; \
1436 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1437 i->private_host_attrs[count].store = NULL; \
1438 i->host_attrs[count] = &i->private_host_attrs[count]; \
1439 count++
1440
1441 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1442 i->private_host_attrs[count] = device_attr_host_##field; \
1443 if (!i->f->set_host_##field) { \
1444 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1445 i->private_host_attrs[count].store = NULL; \
1446 } \
1447 i->host_attrs[count] = &i->private_host_attrs[count]; \
1448 if (i->f->show_host_##field) \
1449 count++
1450
1451
1452 #define fc_private_host_show_function(field, format_string, sz, cast) \
1453 static ssize_t \
1454 show_fc_host_##field (struct device *dev, \
1455 struct device_attribute *attr, char *buf) \
1456 { \
1457 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1458 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1459 }
1460
1461 #define fc_private_host_rd_attr(field, format_string, sz) \
1462 fc_private_host_show_function(field, format_string, sz, ) \
1463 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1464 show_fc_host_##field, NULL)
1465
1466 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1467 fc_private_host_show_function(field, format_string, sz, (cast)) \
1468 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1469 show_fc_host_##field, NULL)
1470
1471 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1472 i->private_host_attrs[count] = device_attr_host_##field; \
1473 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1474 i->private_host_attrs[count].store = NULL; \
1475 i->host_attrs[count] = &i->private_host_attrs[count]; \
1476 count++
1477
1478 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1479 { \
1480 i->private_host_attrs[count] = device_attr_host_##field; \
1481 i->host_attrs[count] = &i->private_host_attrs[count]; \
1482 count++; \
1483 }
1484
1485
1486 /* Fixed Host Attributes */
1487
1488 static ssize_t
1489 show_fc_host_supported_classes (struct device *dev,
1490 struct device_attribute *attr, char *buf)
1491 {
1492 struct Scsi_Host *shost = transport_class_to_shost(dev);
1493
1494 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1495 return snprintf(buf, 20, "unspecified\n");
1496
1497 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1498 }
1499 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1500 show_fc_host_supported_classes, NULL);
1501
1502 static ssize_t
1503 show_fc_host_supported_fc4s (struct device *dev,
1504 struct device_attribute *attr, char *buf)
1505 {
1506 struct Scsi_Host *shost = transport_class_to_shost(dev);
1507 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1508 }
1509 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1510 show_fc_host_supported_fc4s, NULL);
1511
1512 static ssize_t
1513 show_fc_host_supported_speeds (struct device *dev,
1514 struct device_attribute *attr, char *buf)
1515 {
1516 struct Scsi_Host *shost = transport_class_to_shost(dev);
1517
1518 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1519 return snprintf(buf, 20, "unknown\n");
1520
1521 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1522 }
1523 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1524 show_fc_host_supported_speeds, NULL);
1525
1526
1527 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1528 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1529 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1530 unsigned long long);
1531 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1532 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1533 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1534 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1535 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1536 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1537 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1538 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1539 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1540 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1541
1542
1543 /* Dynamic Host Attributes */
1544
1545 static ssize_t
1546 show_fc_host_active_fc4s (struct device *dev,
1547 struct device_attribute *attr, char *buf)
1548 {
1549 struct Scsi_Host *shost = transport_class_to_shost(dev);
1550 struct fc_internal *i = to_fc_internal(shost->transportt);
1551
1552 if (i->f->get_host_active_fc4s)
1553 i->f->get_host_active_fc4s(shost);
1554
1555 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1556 }
1557 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1558 show_fc_host_active_fc4s, NULL);
1559
1560 static ssize_t
1561 show_fc_host_speed (struct device *dev,
1562 struct device_attribute *attr, char *buf)
1563 {
1564 struct Scsi_Host *shost = transport_class_to_shost(dev);
1565 struct fc_internal *i = to_fc_internal(shost->transportt);
1566
1567 if (i->f->get_host_speed)
1568 i->f->get_host_speed(shost);
1569
1570 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1571 return snprintf(buf, 20, "unknown\n");
1572
1573 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1574 }
1575 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1576 show_fc_host_speed, NULL);
1577
1578
1579 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1580 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1581 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1582 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1583 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1584
1585 fc_private_host_show_function(system_hostname, "%s\n",
1586 FC_SYMBOLIC_NAME_SIZE + 1, )
1587 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1588 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1589 show_fc_host_system_hostname, store_fc_host_system_hostname);
1590
1591
1592 /* Private Host Attributes */
1593
1594 static ssize_t
1595 show_fc_private_host_tgtid_bind_type(struct device *dev,
1596 struct device_attribute *attr, char *buf)
1597 {
1598 struct Scsi_Host *shost = transport_class_to_shost(dev);
1599 const char *name;
1600
1601 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1602 if (!name)
1603 return -EINVAL;
1604 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1605 }
1606
1607 #define get_list_head_entry(pos, head, member) \
1608 pos = list_entry((head)->next, typeof(*pos), member)
1609
1610 static ssize_t
1611 store_fc_private_host_tgtid_bind_type(struct device *dev,
1612 struct device_attribute *attr, const char *buf, size_t count)
1613 {
1614 struct Scsi_Host *shost = transport_class_to_shost(dev);
1615 struct fc_rport *rport;
1616 enum fc_tgtid_binding_type val;
1617 unsigned long flags;
1618
1619 if (get_fc_tgtid_bind_type_match(buf, &val))
1620 return -EINVAL;
1621
1622 /* if changing bind type, purge all unused consistent bindings */
1623 if (val != fc_host_tgtid_bind_type(shost)) {
1624 spin_lock_irqsave(shost->host_lock, flags);
1625 while (!list_empty(&fc_host_rport_bindings(shost))) {
1626 get_list_head_entry(rport,
1627 &fc_host_rport_bindings(shost), peers);
1628 list_del(&rport->peers);
1629 rport->port_state = FC_PORTSTATE_DELETED;
1630 fc_queue_work(shost, &rport->rport_delete_work);
1631 }
1632 spin_unlock_irqrestore(shost->host_lock, flags);
1633 }
1634
1635 fc_host_tgtid_bind_type(shost) = val;
1636 return count;
1637 }
1638
1639 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1640 show_fc_private_host_tgtid_bind_type,
1641 store_fc_private_host_tgtid_bind_type);
1642
1643 static ssize_t
1644 store_fc_private_host_issue_lip(struct device *dev,
1645 struct device_attribute *attr, const char *buf, size_t count)
1646 {
1647 struct Scsi_Host *shost = transport_class_to_shost(dev);
1648 struct fc_internal *i = to_fc_internal(shost->transportt);
1649 int ret;
1650
1651 /* ignore any data value written to the attribute */
1652 if (i->f->issue_fc_host_lip) {
1653 ret = i->f->issue_fc_host_lip(shost);
1654 return ret ? ret: count;
1655 }
1656
1657 return -ENOENT;
1658 }
1659
1660 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1661 store_fc_private_host_issue_lip);
1662
1663 static ssize_t
1664 store_fc_private_host_dev_loss_tmo(struct device *dev,
1665 struct device_attribute *attr,
1666 const char *buf, size_t count)
1667 {
1668 struct Scsi_Host *shost = transport_class_to_shost(dev);
1669 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1670 struct fc_rport *rport;
1671 unsigned long val, flags;
1672 int rc;
1673
1674 rc = fc_str_to_dev_loss(buf, &val);
1675 if (rc)
1676 return rc;
1677
1678 fc_host_dev_loss_tmo(shost) = val;
1679 spin_lock_irqsave(shost->host_lock, flags);
1680 list_for_each_entry(rport, &fc_host->rports, peers)
1681 fc_rport_set_dev_loss_tmo(rport, val);
1682 spin_unlock_irqrestore(shost->host_lock, flags);
1683 return count;
1684 }
1685
1686 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1687 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1688 show_fc_host_dev_loss_tmo,
1689 store_fc_private_host_dev_loss_tmo);
1690
1691 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1692
1693 /*
1694 * Host Statistics Management
1695 */
1696
1697 /* Show a given attribute in the statistics group */
1698 static ssize_t
1699 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1700 {
1701 struct Scsi_Host *shost = transport_class_to_shost(dev);
1702 struct fc_internal *i = to_fc_internal(shost->transportt);
1703 struct fc_host_statistics *stats;
1704 ssize_t ret = -ENOENT;
1705
1706 if (offset > sizeof(struct fc_host_statistics) ||
1707 offset % sizeof(u64) != 0)
1708 WARN_ON(1);
1709
1710 if (i->f->get_fc_host_stats) {
1711 stats = (i->f->get_fc_host_stats)(shost);
1712 if (stats)
1713 ret = snprintf(buf, 20, "0x%llx\n",
1714 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1715 }
1716 return ret;
1717 }
1718
1719
1720 /* generate a read-only statistics attribute */
1721 #define fc_host_statistic(name) \
1722 static ssize_t show_fcstat_##name(struct device *cd, \
1723 struct device_attribute *attr, \
1724 char *buf) \
1725 { \
1726 return fc_stat_show(cd, buf, \
1727 offsetof(struct fc_host_statistics, name)); \
1728 } \
1729 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1730
1731 fc_host_statistic(seconds_since_last_reset);
1732 fc_host_statistic(tx_frames);
1733 fc_host_statistic(tx_words);
1734 fc_host_statistic(rx_frames);
1735 fc_host_statistic(rx_words);
1736 fc_host_statistic(lip_count);
1737 fc_host_statistic(nos_count);
1738 fc_host_statistic(error_frames);
1739 fc_host_statistic(dumped_frames);
1740 fc_host_statistic(link_failure_count);
1741 fc_host_statistic(loss_of_sync_count);
1742 fc_host_statistic(loss_of_signal_count);
1743 fc_host_statistic(prim_seq_protocol_err_count);
1744 fc_host_statistic(invalid_tx_word_count);
1745 fc_host_statistic(invalid_crc_count);
1746 fc_host_statistic(fcp_input_requests);
1747 fc_host_statistic(fcp_output_requests);
1748 fc_host_statistic(fcp_control_requests);
1749 fc_host_statistic(fcp_input_megabytes);
1750 fc_host_statistic(fcp_output_megabytes);
1751 fc_host_statistic(fcp_packet_alloc_failures);
1752 fc_host_statistic(fcp_packet_aborts);
1753 fc_host_statistic(fcp_frame_alloc_failures);
1754 fc_host_statistic(fc_no_free_exch);
1755 fc_host_statistic(fc_no_free_exch_xid);
1756 fc_host_statistic(fc_xid_not_found);
1757 fc_host_statistic(fc_xid_busy);
1758 fc_host_statistic(fc_seq_not_found);
1759 fc_host_statistic(fc_non_bls_resp);
1760
1761 static ssize_t
1762 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1763 const char *buf, size_t count)
1764 {
1765 struct Scsi_Host *shost = transport_class_to_shost(dev);
1766 struct fc_internal *i = to_fc_internal(shost->transportt);
1767
1768 /* ignore any data value written to the attribute */
1769 if (i->f->reset_fc_host_stats) {
1770 i->f->reset_fc_host_stats(shost);
1771 return count;
1772 }
1773
1774 return -ENOENT;
1775 }
1776 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1777 fc_reset_statistics);
1778
1779 static struct attribute *fc_statistics_attrs[] = {
1780 &device_attr_host_seconds_since_last_reset.attr,
1781 &device_attr_host_tx_frames.attr,
1782 &device_attr_host_tx_words.attr,
1783 &device_attr_host_rx_frames.attr,
1784 &device_attr_host_rx_words.attr,
1785 &device_attr_host_lip_count.attr,
1786 &device_attr_host_nos_count.attr,
1787 &device_attr_host_error_frames.attr,
1788 &device_attr_host_dumped_frames.attr,
1789 &device_attr_host_link_failure_count.attr,
1790 &device_attr_host_loss_of_sync_count.attr,
1791 &device_attr_host_loss_of_signal_count.attr,
1792 &device_attr_host_prim_seq_protocol_err_count.attr,
1793 &device_attr_host_invalid_tx_word_count.attr,
1794 &device_attr_host_invalid_crc_count.attr,
1795 &device_attr_host_fcp_input_requests.attr,
1796 &device_attr_host_fcp_output_requests.attr,
1797 &device_attr_host_fcp_control_requests.attr,
1798 &device_attr_host_fcp_input_megabytes.attr,
1799 &device_attr_host_fcp_output_megabytes.attr,
1800 &device_attr_host_fcp_packet_alloc_failures.attr,
1801 &device_attr_host_fcp_packet_aborts.attr,
1802 &device_attr_host_fcp_frame_alloc_failures.attr,
1803 &device_attr_host_fc_no_free_exch.attr,
1804 &device_attr_host_fc_no_free_exch_xid.attr,
1805 &device_attr_host_fc_xid_not_found.attr,
1806 &device_attr_host_fc_xid_busy.attr,
1807 &device_attr_host_fc_seq_not_found.attr,
1808 &device_attr_host_fc_non_bls_resp.attr,
1809 &device_attr_host_reset_statistics.attr,
1810 NULL
1811 };
1812
1813 static struct attribute_group fc_statistics_group = {
1814 .name = "statistics",
1815 .attrs = fc_statistics_attrs,
1816 };
1817
1818
1819 /* Host Vport Attributes */
1820
1821 static int
1822 fc_parse_wwn(const char *ns, u64 *nm)
1823 {
1824 unsigned int i, j;
1825 u8 wwn[8];
1826
1827 memset(wwn, 0, sizeof(wwn));
1828
1829 /* Validate and store the new name */
1830 for (i=0, j=0; i < 16; i++) {
1831 int value;
1832
1833 value = hex_to_bin(*ns++);
1834 if (value >= 0)
1835 j = (j << 4) | value;
1836 else
1837 return -EINVAL;
1838 if (i % 2) {
1839 wwn[i/2] = j & 0xff;
1840 j = 0;
1841 }
1842 }
1843
1844 *nm = wwn_to_u64(wwn);
1845
1846 return 0;
1847 }
1848
1849
1850 /*
1851 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1852 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1853 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1854 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1855 */
1856 static ssize_t
1857 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1858 const char *buf, size_t count)
1859 {
1860 struct Scsi_Host *shost = transport_class_to_shost(dev);
1861 struct fc_vport_identifiers vid;
1862 struct fc_vport *vport;
1863 unsigned int cnt=count;
1864 int stat;
1865
1866 memset(&vid, 0, sizeof(vid));
1867
1868 /* count may include a LF at end of string */
1869 if (buf[cnt-1] == '\n')
1870 cnt--;
1871
1872 /* validate we have enough characters for WWPN */
1873 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1874 return -EINVAL;
1875
1876 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1877 if (stat)
1878 return stat;
1879
1880 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1881 if (stat)
1882 return stat;
1883
1884 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1885 vid.vport_type = FC_PORTTYPE_NPIV;
1886 /* vid.symbolic_name is already zero/NULL's */
1887 vid.disable = false; /* always enabled */
1888
1889 /* we only allow support on Channel 0 !!! */
1890 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1891 return stat ? stat : count;
1892 }
1893 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1894 store_fc_host_vport_create);
1895
1896
1897 /*
1898 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1899 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1900 * The WWNs are specified as hex characters, and may *not* contain
1901 * any prefixes (e.g. 0x, x, etc)
1902 */
1903 static ssize_t
1904 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1905 const char *buf, size_t count)
1906 {
1907 struct Scsi_Host *shost = transport_class_to_shost(dev);
1908 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1909 struct fc_vport *vport;
1910 u64 wwpn, wwnn;
1911 unsigned long flags;
1912 unsigned int cnt=count;
1913 int stat, match;
1914
1915 /* count may include a LF at end of string */
1916 if (buf[cnt-1] == '\n')
1917 cnt--;
1918
1919 /* validate we have enough characters for WWPN */
1920 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1921 return -EINVAL;
1922
1923 stat = fc_parse_wwn(&buf[0], &wwpn);
1924 if (stat)
1925 return stat;
1926
1927 stat = fc_parse_wwn(&buf[17], &wwnn);
1928 if (stat)
1929 return stat;
1930
1931 spin_lock_irqsave(shost->host_lock, flags);
1932 match = 0;
1933 /* we only allow support on Channel 0 !!! */
1934 list_for_each_entry(vport, &fc_host->vports, peers) {
1935 if ((vport->channel == 0) &&
1936 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1937 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1938 break;
1939 vport->flags |= FC_VPORT_DELETING;
1940 match = 1;
1941 break;
1942 }
1943 }
1944 spin_unlock_irqrestore(shost->host_lock, flags);
1945
1946 if (!match)
1947 return -ENODEV;
1948
1949 stat = fc_vport_terminate(vport);
1950 return stat ? stat : count;
1951 }
1952 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1953 store_fc_host_vport_delete);
1954
1955
1956 static int fc_host_match(struct attribute_container *cont,
1957 struct device *dev)
1958 {
1959 struct Scsi_Host *shost;
1960 struct fc_internal *i;
1961
1962 if (!scsi_is_host_device(dev))
1963 return 0;
1964
1965 shost = dev_to_shost(dev);
1966 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1967 != &fc_host_class.class)
1968 return 0;
1969
1970 i = to_fc_internal(shost->transportt);
1971
1972 return &i->t.host_attrs.ac == cont;
1973 }
1974
1975 static int fc_target_match(struct attribute_container *cont,
1976 struct device *dev)
1977 {
1978 struct Scsi_Host *shost;
1979 struct fc_internal *i;
1980
1981 if (!scsi_is_target_device(dev))
1982 return 0;
1983
1984 shost = dev_to_shost(dev->parent);
1985 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1986 != &fc_host_class.class)
1987 return 0;
1988
1989 i = to_fc_internal(shost->transportt);
1990
1991 return &i->t.target_attrs.ac == cont;
1992 }
1993
1994 static void fc_rport_dev_release(struct device *dev)
1995 {
1996 struct fc_rport *rport = dev_to_rport(dev);
1997 put_device(dev->parent);
1998 kfree(rport);
1999 }
2000
2001 int scsi_is_fc_rport(const struct device *dev)
2002 {
2003 return dev->release == fc_rport_dev_release;
2004 }
2005 EXPORT_SYMBOL(scsi_is_fc_rport);
2006
2007 static int fc_rport_match(struct attribute_container *cont,
2008 struct device *dev)
2009 {
2010 struct Scsi_Host *shost;
2011 struct fc_internal *i;
2012
2013 if (!scsi_is_fc_rport(dev))
2014 return 0;
2015
2016 shost = dev_to_shost(dev->parent);
2017 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2018 != &fc_host_class.class)
2019 return 0;
2020
2021 i = to_fc_internal(shost->transportt);
2022
2023 return &i->rport_attr_cont.ac == cont;
2024 }
2025
2026
2027 static void fc_vport_dev_release(struct device *dev)
2028 {
2029 struct fc_vport *vport = dev_to_vport(dev);
2030 put_device(dev->parent); /* release kobj parent */
2031 kfree(vport);
2032 }
2033
2034 static int scsi_is_fc_vport(const struct device *dev)
2035 {
2036 return dev->release == fc_vport_dev_release;
2037 }
2038
2039 static int fc_vport_match(struct attribute_container *cont,
2040 struct device *dev)
2041 {
2042 struct fc_vport *vport;
2043 struct Scsi_Host *shost;
2044 struct fc_internal *i;
2045
2046 if (!scsi_is_fc_vport(dev))
2047 return 0;
2048 vport = dev_to_vport(dev);
2049
2050 shost = vport_to_shost(vport);
2051 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2052 != &fc_host_class.class)
2053 return 0;
2054
2055 i = to_fc_internal(shost->transportt);
2056 return &i->vport_attr_cont.ac == cont;
2057 }
2058
2059
2060 /**
2061 * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2062 * @scmd: The SCSI command which timed out
2063 *
2064 * This routine protects against error handlers getting invoked while a
2065 * rport is in a blocked state, typically due to a temporarily loss of
2066 * connectivity. If the error handlers are allowed to proceed, requests
2067 * to abort i/o, reset the target, etc will likely fail as there is no way
2068 * to communicate with the device to perform the requested function. These
2069 * failures may result in the midlayer taking the device offline, requiring
2070 * manual intervention to restore operation.
2071 *
2072 * This routine, called whenever an i/o times out, validates the state of
2073 * the underlying rport. If the rport is blocked, it returns
2074 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2075 * Eventually, either the device will return, or devloss_tmo will fire,
2076 * and when the timeout then fires, it will be handled normally.
2077 * If the rport is not blocked, normal error handling continues.
2078 *
2079 * Notes:
2080 * This routine assumes no locks are held on entry.
2081 */
2082 enum blk_eh_timer_return
2083 fc_eh_timed_out(struct scsi_cmnd *scmd)
2084 {
2085 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2086
2087 if (rport->port_state == FC_PORTSTATE_BLOCKED)
2088 return BLK_EH_RESET_TIMER;
2089
2090 return BLK_EH_DONE;
2091 }
2092 EXPORT_SYMBOL(fc_eh_timed_out);
2093
2094 /*
2095 * Called by fc_user_scan to locate an rport on the shost that
2096 * matches the channel and target id, and invoke scsi_scan_target()
2097 * on the rport.
2098 */
2099 static void
2100 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2101 {
2102 struct fc_rport *rport;
2103 unsigned long flags;
2104
2105 spin_lock_irqsave(shost->host_lock, flags);
2106
2107 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2108 if (rport->scsi_target_id == -1)
2109 continue;
2110
2111 if (rport->port_state != FC_PORTSTATE_ONLINE)
2112 continue;
2113
2114 if ((channel == rport->channel) &&
2115 (id == rport->scsi_target_id)) {
2116 spin_unlock_irqrestore(shost->host_lock, flags);
2117 scsi_scan_target(&rport->dev, channel, id, lun,
2118 SCSI_SCAN_MANUAL);
2119 return;
2120 }
2121 }
2122
2123 spin_unlock_irqrestore(shost->host_lock, flags);
2124 }
2125
2126 /*
2127 * Called via sysfs scan routines. Necessary, as the FC transport
2128 * wants to place all target objects below the rport object. So this
2129 * routine must invoke the scsi_scan_target() routine with the rport
2130 * object as the parent.
2131 */
2132 static int
2133 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2134 {
2135 uint chlo, chhi;
2136 uint tgtlo, tgthi;
2137
2138 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2139 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2140 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2141 return -EINVAL;
2142
2143 if (channel == SCAN_WILD_CARD) {
2144 chlo = 0;
2145 chhi = shost->max_channel + 1;
2146 } else {
2147 chlo = channel;
2148 chhi = channel + 1;
2149 }
2150
2151 if (id == SCAN_WILD_CARD) {
2152 tgtlo = 0;
2153 tgthi = shost->max_id;
2154 } else {
2155 tgtlo = id;
2156 tgthi = id + 1;
2157 }
2158
2159 for ( ; chlo < chhi; chlo++)
2160 for ( ; tgtlo < tgthi; tgtlo++)
2161 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2162
2163 return 0;
2164 }
2165
2166 struct scsi_transport_template *
2167 fc_attach_transport(struct fc_function_template *ft)
2168 {
2169 int count;
2170 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2171 GFP_KERNEL);
2172
2173 if (unlikely(!i))
2174 return NULL;
2175
2176 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2177 i->t.target_attrs.ac.class = &fc_transport_class.class;
2178 i->t.target_attrs.ac.match = fc_target_match;
2179 i->t.target_size = sizeof(struct fc_starget_attrs);
2180 transport_container_register(&i->t.target_attrs);
2181
2182 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2183 i->t.host_attrs.ac.class = &fc_host_class.class;
2184 i->t.host_attrs.ac.match = fc_host_match;
2185 i->t.host_size = sizeof(struct fc_host_attrs);
2186 if (ft->get_fc_host_stats)
2187 i->t.host_attrs.statistics = &fc_statistics_group;
2188 transport_container_register(&i->t.host_attrs);
2189
2190 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2191 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2192 i->rport_attr_cont.ac.match = fc_rport_match;
2193 transport_container_register(&i->rport_attr_cont);
2194
2195 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2196 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2197 i->vport_attr_cont.ac.match = fc_vport_match;
2198 transport_container_register(&i->vport_attr_cont);
2199
2200 i->f = ft;
2201
2202 /* Transport uses the shost workq for scsi scanning */
2203 i->t.create_work_queue = 1;
2204
2205 i->t.user_scan = fc_user_scan;
2206
2207 /*
2208 * Setup SCSI Target Attributes.
2209 */
2210 count = 0;
2211 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2212 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2213 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2214
2215 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2216
2217 i->starget_attrs[count] = NULL;
2218
2219
2220 /*
2221 * Setup SCSI Host Attributes.
2222 */
2223 count=0;
2224 SETUP_HOST_ATTRIBUTE_RD(node_name);
2225 SETUP_HOST_ATTRIBUTE_RD(port_name);
2226 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2227 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2228 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2229 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2230 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2231 if (ft->vport_create) {
2232 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2233 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2234 }
2235 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2236 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2237 SETUP_HOST_ATTRIBUTE_RD(model);
2238 SETUP_HOST_ATTRIBUTE_RD(model_description);
2239 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2240 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2241 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2242 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2243
2244 SETUP_HOST_ATTRIBUTE_RD(port_id);
2245 SETUP_HOST_ATTRIBUTE_RD(port_type);
2246 SETUP_HOST_ATTRIBUTE_RD(port_state);
2247 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2248 SETUP_HOST_ATTRIBUTE_RD(speed);
2249 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2250 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2251 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2252
2253 /* Transport-managed attributes */
2254 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2255 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2256 if (ft->issue_fc_host_lip)
2257 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2258 if (ft->vport_create)
2259 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2260 if (ft->vport_delete)
2261 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2262
2263 BUG_ON(count > FC_HOST_NUM_ATTRS);
2264
2265 i->host_attrs[count] = NULL;
2266
2267 /*
2268 * Setup Remote Port Attributes.
2269 */
2270 count=0;
2271 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2272 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2273 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2274 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2275 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2276 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2277 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2278 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2279 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2280 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2281
2282 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2283
2284 i->rport_attrs[count] = NULL;
2285
2286 /*
2287 * Setup Virtual Port Attributes.
2288 */
2289 count=0;
2290 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2291 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2292 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2293 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2294 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2295 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2296 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2297 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2298 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2299
2300 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2301
2302 i->vport_attrs[count] = NULL;
2303
2304 return &i->t;
2305 }
2306 EXPORT_SYMBOL(fc_attach_transport);
2307
2308 void fc_release_transport(struct scsi_transport_template *t)
2309 {
2310 struct fc_internal *i = to_fc_internal(t);
2311
2312 transport_container_unregister(&i->t.target_attrs);
2313 transport_container_unregister(&i->t.host_attrs);
2314 transport_container_unregister(&i->rport_attr_cont);
2315 transport_container_unregister(&i->vport_attr_cont);
2316
2317 kfree(i);
2318 }
2319 EXPORT_SYMBOL(fc_release_transport);
2320
2321 /**
2322 * fc_queue_work - Queue work to the fc_host workqueue.
2323 * @shost: Pointer to Scsi_Host bound to fc_host.
2324 * @work: Work to queue for execution.
2325 *
2326 * Return value:
2327 * 1 - work queued for execution
2328 * 0 - work is already queued
2329 * -EINVAL - work queue doesn't exist
2330 */
2331 static int
2332 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2333 {
2334 if (unlikely(!fc_host_work_q(shost))) {
2335 printk(KERN_ERR
2336 "ERROR: FC host '%s' attempted to queue work, "
2337 "when no workqueue created.\n", shost->hostt->name);
2338 dump_stack();
2339
2340 return -EINVAL;
2341 }
2342
2343 return queue_work(fc_host_work_q(shost), work);
2344 }
2345
2346 /**
2347 * fc_flush_work - Flush a fc_host's workqueue.
2348 * @shost: Pointer to Scsi_Host bound to fc_host.
2349 */
2350 static void
2351 fc_flush_work(struct Scsi_Host *shost)
2352 {
2353 if (!fc_host_work_q(shost)) {
2354 printk(KERN_ERR
2355 "ERROR: FC host '%s' attempted to flush work, "
2356 "when no workqueue created.\n", shost->hostt->name);
2357 dump_stack();
2358 return;
2359 }
2360
2361 flush_workqueue(fc_host_work_q(shost));
2362 }
2363
2364 /**
2365 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2366 * @shost: Pointer to Scsi_Host bound to fc_host.
2367 * @work: Work to queue for execution.
2368 * @delay: jiffies to delay the work queuing
2369 *
2370 * Return value:
2371 * 1 on success / 0 already queued / < 0 for error
2372 */
2373 static int
2374 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2375 unsigned long delay)
2376 {
2377 if (unlikely(!fc_host_devloss_work_q(shost))) {
2378 printk(KERN_ERR
2379 "ERROR: FC host '%s' attempted to queue work, "
2380 "when no workqueue created.\n", shost->hostt->name);
2381 dump_stack();
2382
2383 return -EINVAL;
2384 }
2385
2386 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2387 }
2388
2389 /**
2390 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2391 * @shost: Pointer to Scsi_Host bound to fc_host.
2392 */
2393 static void
2394 fc_flush_devloss(struct Scsi_Host *shost)
2395 {
2396 if (!fc_host_devloss_work_q(shost)) {
2397 printk(KERN_ERR
2398 "ERROR: FC host '%s' attempted to flush work, "
2399 "when no workqueue created.\n", shost->hostt->name);
2400 dump_stack();
2401 return;
2402 }
2403
2404 flush_workqueue(fc_host_devloss_work_q(shost));
2405 }
2406
2407
2408 /**
2409 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2410 * @shost: Which &Scsi_Host
2411 *
2412 * This routine is expected to be called immediately preceding the
2413 * a driver's call to scsi_remove_host().
2414 *
2415 * WARNING: A driver utilizing the fc_transport, which fails to call
2416 * this routine prior to scsi_remove_host(), will leave dangling
2417 * objects in /sys/class/fc_remote_ports. Access to any of these
2418 * objects can result in a system crash !!!
2419 *
2420 * Notes:
2421 * This routine assumes no locks are held on entry.
2422 */
2423 void
2424 fc_remove_host(struct Scsi_Host *shost)
2425 {
2426 struct fc_vport *vport = NULL, *next_vport = NULL;
2427 struct fc_rport *rport = NULL, *next_rport = NULL;
2428 struct workqueue_struct *work_q;
2429 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2430 unsigned long flags;
2431
2432 spin_lock_irqsave(shost->host_lock, flags);
2433
2434 /* Remove any vports */
2435 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2436 vport->flags |= FC_VPORT_DELETING;
2437 fc_queue_work(shost, &vport->vport_delete_work);
2438 }
2439
2440 /* Remove any remote ports */
2441 list_for_each_entry_safe(rport, next_rport,
2442 &fc_host->rports, peers) {
2443 list_del(&rport->peers);
2444 rport->port_state = FC_PORTSTATE_DELETED;
2445 fc_queue_work(shost, &rport->rport_delete_work);
2446 }
2447
2448 list_for_each_entry_safe(rport, next_rport,
2449 &fc_host->rport_bindings, peers) {
2450 list_del(&rport->peers);
2451 rport->port_state = FC_PORTSTATE_DELETED;
2452 fc_queue_work(shost, &rport->rport_delete_work);
2453 }
2454
2455 spin_unlock_irqrestore(shost->host_lock, flags);
2456
2457 /* flush all scan work items */
2458 scsi_flush_work(shost);
2459
2460 /* flush all stgt delete, and rport delete work items, then kill it */
2461 if (fc_host->work_q) {
2462 work_q = fc_host->work_q;
2463 fc_host->work_q = NULL;
2464 destroy_workqueue(work_q);
2465 }
2466
2467 /* flush all devloss work items, then kill it */
2468 if (fc_host->devloss_work_q) {
2469 work_q = fc_host->devloss_work_q;
2470 fc_host->devloss_work_q = NULL;
2471 destroy_workqueue(work_q);
2472 }
2473 }
2474 EXPORT_SYMBOL(fc_remove_host);
2475
2476 static void fc_terminate_rport_io(struct fc_rport *rport)
2477 {
2478 struct Scsi_Host *shost = rport_to_shost(rport);
2479 struct fc_internal *i = to_fc_internal(shost->transportt);
2480
2481 /* Involve the LLDD if possible to terminate all io on the rport. */
2482 if (i->f->terminate_rport_io)
2483 i->f->terminate_rport_io(rport);
2484
2485 /*
2486 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2487 */
2488 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2489 }
2490
2491 /**
2492 * fc_starget_delete - called to delete the scsi descendants of an rport
2493 * @work: remote port to be operated on.
2494 *
2495 * Deletes target and all sdevs.
2496 */
2497 static void
2498 fc_starget_delete(struct work_struct *work)
2499 {
2500 struct fc_rport *rport =
2501 container_of(work, struct fc_rport, stgt_delete_work);
2502
2503 fc_terminate_rport_io(rport);
2504 scsi_remove_target(&rport->dev);
2505 }
2506
2507
2508 /**
2509 * fc_rport_final_delete - finish rport termination and delete it.
2510 * @work: remote port to be deleted.
2511 */
2512 static void
2513 fc_rport_final_delete(struct work_struct *work)
2514 {
2515 struct fc_rport *rport =
2516 container_of(work, struct fc_rport, rport_delete_work);
2517 struct device *dev = &rport->dev;
2518 struct Scsi_Host *shost = rport_to_shost(rport);
2519 struct fc_internal *i = to_fc_internal(shost->transportt);
2520 unsigned long flags;
2521 int do_callback = 0;
2522
2523 fc_terminate_rport_io(rport);
2524
2525 /*
2526 * if a scan is pending, flush the SCSI Host work_q so that
2527 * that we can reclaim the rport scan work element.
2528 */
2529 if (rport->flags & FC_RPORT_SCAN_PENDING)
2530 scsi_flush_work(shost);
2531
2532 /*
2533 * Cancel any outstanding timers. These should really exist
2534 * only when rmmod'ing the LLDD and we're asking for
2535 * immediate termination of the rports
2536 */
2537 spin_lock_irqsave(shost->host_lock, flags);
2538 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2539 spin_unlock_irqrestore(shost->host_lock, flags);
2540 if (!cancel_delayed_work(&rport->fail_io_work))
2541 fc_flush_devloss(shost);
2542 if (!cancel_delayed_work(&rport->dev_loss_work))
2543 fc_flush_devloss(shost);
2544 cancel_work_sync(&rport->scan_work);
2545 spin_lock_irqsave(shost->host_lock, flags);
2546 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2547 }
2548 spin_unlock_irqrestore(shost->host_lock, flags);
2549
2550 /* Delete SCSI target and sdevs */
2551 if (rport->scsi_target_id != -1)
2552 fc_starget_delete(&rport->stgt_delete_work);
2553
2554 /*
2555 * Notify the driver that the rport is now dead. The LLDD will
2556 * also guarantee that any communication to the rport is terminated
2557 *
2558 * Avoid this call if we already called it when we preserved the
2559 * rport for the binding.
2560 */
2561 spin_lock_irqsave(shost->host_lock, flags);
2562 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2563 (i->f->dev_loss_tmo_callbk)) {
2564 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2565 do_callback = 1;
2566 }
2567 spin_unlock_irqrestore(shost->host_lock, flags);
2568
2569 if (do_callback)
2570 i->f->dev_loss_tmo_callbk(rport);
2571
2572 fc_bsg_remove(rport->rqst_q);
2573
2574 transport_remove_device(dev);
2575 device_del(dev);
2576 transport_destroy_device(dev);
2577 scsi_host_put(shost); /* for fc_host->rport list */
2578 put_device(dev); /* for self-reference */
2579 }
2580
2581
2582 /**
2583 * fc_remote_port_create - allocates and creates a remote FC port.
2584 * @shost: scsi host the remote port is connected to.
2585 * @channel: Channel on shost port connected to.
2586 * @ids: The world wide names, fc address, and FC4 port
2587 * roles for the remote port.
2588 *
2589 * Allocates and creates the remoter port structure, including the
2590 * class and sysfs creation.
2591 *
2592 * Notes:
2593 * This routine assumes no locks are held on entry.
2594 */
2595 static struct fc_rport *
2596 fc_remote_port_create(struct Scsi_Host *shost, int channel,
2597 struct fc_rport_identifiers *ids)
2598 {
2599 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2600 struct fc_internal *fci = to_fc_internal(shost->transportt);
2601 struct fc_rport *rport;
2602 struct device *dev;
2603 unsigned long flags;
2604 int error;
2605 size_t size;
2606
2607 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2608 rport = kzalloc(size, GFP_KERNEL);
2609 if (unlikely(!rport)) {
2610 printk(KERN_ERR "%s: allocation failure\n", __func__);
2611 return NULL;
2612 }
2613
2614 rport->maxframe_size = -1;
2615 rport->supported_classes = FC_COS_UNSPECIFIED;
2616 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2617 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2618 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2619 rport->port_id = ids->port_id;
2620 rport->roles = ids->roles;
2621 rport->port_state = FC_PORTSTATE_ONLINE;
2622 if (fci->f->dd_fcrport_size)
2623 rport->dd_data = &rport[1];
2624 rport->channel = channel;
2625 rport->fast_io_fail_tmo = -1;
2626
2627 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2628 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2629 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2630 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2631 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2632
2633 spin_lock_irqsave(shost->host_lock, flags);
2634
2635 rport->number = fc_host->next_rport_number++;
2636 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
2637 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
2638 rport->scsi_target_id = fc_host->next_target_id++;
2639 else
2640 rport->scsi_target_id = -1;
2641 list_add_tail(&rport->peers, &fc_host->rports);
2642 scsi_host_get(shost); /* for fc_host->rport list */
2643
2644 spin_unlock_irqrestore(shost->host_lock, flags);
2645
2646 dev = &rport->dev;
2647 device_initialize(dev); /* takes self reference */
2648 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2649 dev->release = fc_rport_dev_release;
2650 dev_set_name(dev, "rport-%d:%d-%d",
2651 shost->host_no, channel, rport->number);
2652 transport_setup_device(dev);
2653
2654 error = device_add(dev);
2655 if (error) {
2656 printk(KERN_ERR "FC Remote Port device_add failed\n");
2657 goto delete_rport;
2658 }
2659 transport_add_device(dev);
2660 transport_configure_device(dev);
2661
2662 fc_bsg_rportadd(shost, rport);
2663 /* ignore any bsg add error - we just can't do sgio */
2664
2665 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2666 /* initiate a scan of the target */
2667 rport->flags |= FC_RPORT_SCAN_PENDING;
2668 scsi_queue_work(shost, &rport->scan_work);
2669 }
2670
2671 return rport;
2672
2673 delete_rport:
2674 transport_destroy_device(dev);
2675 spin_lock_irqsave(shost->host_lock, flags);
2676 list_del(&rport->peers);
2677 scsi_host_put(shost); /* for fc_host->rport list */
2678 spin_unlock_irqrestore(shost->host_lock, flags);
2679 put_device(dev->parent);
2680 kfree(rport);
2681 return NULL;
2682 }
2683
2684 /**
2685 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2686 * @shost: scsi host the remote port is connected to.
2687 * @channel: Channel on shost port connected to.
2688 * @ids: The world wide names, fc address, and FC4 port
2689 * roles for the remote port.
2690 *
2691 * The LLDD calls this routine to notify the transport of the existence
2692 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2693 * of the port, it's FC address (port_id), and the FC4 roles that are
2694 * active for the port.
2695 *
2696 * For ports that are FCP targets (aka scsi targets), the FC transport
2697 * maintains consistent target id bindings on behalf of the LLDD.
2698 * A consistent target id binding is an assignment of a target id to
2699 * a remote port identifier, which persists while the scsi host is
2700 * attached. The remote port can disappear, then later reappear, and
2701 * it's target id assignment remains the same. This allows for shifts
2702 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2703 * changes to the scsi subsystem which is based on scsi host number and
2704 * target id values. Bindings are only valid during the attachment of
2705 * the scsi host. If the host detaches, then later re-attaches, target
2706 * id bindings may change.
2707 *
2708 * This routine is responsible for returning a remote port structure.
2709 * The routine will search the list of remote ports it maintains
2710 * internally on behalf of consistent target id mappings. If found, the
2711 * remote port structure will be reused. Otherwise, a new remote port
2712 * structure will be allocated.
2713 *
2714 * Whenever a remote port is allocated, a new fc_remote_port class
2715 * device is created.
2716 *
2717 * Should not be called from interrupt context.
2718 *
2719 * Notes:
2720 * This routine assumes no locks are held on entry.
2721 */
2722 struct fc_rport *
2723 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2724 struct fc_rport_identifiers *ids)
2725 {
2726 struct fc_internal *fci = to_fc_internal(shost->transportt);
2727 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2728 struct fc_rport *rport;
2729 unsigned long flags;
2730 int match = 0;
2731
2732 /* ensure any stgt delete functions are done */
2733 fc_flush_work(shost);
2734
2735 /*
2736 * Search the list of "active" rports, for an rport that has been
2737 * deleted, but we've held off the real delete while the target
2738 * is in a "blocked" state.
2739 */
2740 spin_lock_irqsave(shost->host_lock, flags);
2741
2742 list_for_each_entry(rport, &fc_host->rports, peers) {
2743
2744 if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
2745 rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
2746 (rport->channel == channel)) {
2747
2748 switch (fc_host->tgtid_bind_type) {
2749 case FC_TGTID_BIND_BY_WWPN:
2750 case FC_TGTID_BIND_NONE:
2751 if (rport->port_name == ids->port_name)
2752 match = 1;
2753 break;
2754 case FC_TGTID_BIND_BY_WWNN:
2755 if (rport->node_name == ids->node_name)
2756 match = 1;
2757 break;
2758 case FC_TGTID_BIND_BY_ID:
2759 if (rport->port_id == ids->port_id)
2760 match = 1;
2761 break;
2762 }
2763
2764 if (match) {
2765
2766 memcpy(&rport->node_name, &ids->node_name,
2767 sizeof(rport->node_name));
2768 memcpy(&rport->port_name, &ids->port_name,
2769 sizeof(rport->port_name));
2770 rport->port_id = ids->port_id;
2771
2772 rport->port_state = FC_PORTSTATE_ONLINE;
2773 rport->roles = ids->roles;
2774
2775 spin_unlock_irqrestore(shost->host_lock, flags);
2776
2777 if (fci->f->dd_fcrport_size)
2778 memset(rport->dd_data, 0,
2779 fci->f->dd_fcrport_size);
2780
2781 /*
2782 * If we were not a target, cancel the
2783 * io terminate and rport timers, and
2784 * we're done.
2785 *
2786 * If we were a target, but our new role
2787 * doesn't indicate a target, leave the
2788 * timers running expecting the role to
2789 * change as the target fully logs in. If
2790 * it doesn't, the target will be torn down.
2791 *
2792 * If we were a target, and our role shows
2793 * we're still a target, cancel the timers
2794 * and kick off a scan.
2795 */
2796
2797 /* was a target, not in roles */
2798 if ((rport->scsi_target_id != -1) &&
2799 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2800 return rport;
2801
2802 /*
2803 * Stop the fail io and dev_loss timers.
2804 * If they flush, the port_state will
2805 * be checked and will NOOP the function.
2806 */
2807 if (!cancel_delayed_work(&rport->fail_io_work))
2808 fc_flush_devloss(shost);
2809 if (!cancel_delayed_work(&rport->dev_loss_work))
2810 fc_flush_devloss(shost);
2811
2812 spin_lock_irqsave(shost->host_lock, flags);
2813
2814 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2815 FC_RPORT_DEVLOSS_PENDING |
2816 FC_RPORT_DEVLOSS_CALLBK_DONE);
2817
2818 spin_unlock_irqrestore(shost->host_lock, flags);
2819
2820 /* if target, initiate a scan */
2821 if (rport->scsi_target_id != -1) {
2822 scsi_target_unblock(&rport->dev,
2823 SDEV_RUNNING);
2824 spin_lock_irqsave(shost->host_lock,
2825 flags);
2826 rport->flags |= FC_RPORT_SCAN_PENDING;
2827 scsi_queue_work(shost,
2828 &rport->scan_work);
2829 spin_unlock_irqrestore(shost->host_lock,
2830 flags);
2831 }
2832
2833 fc_bsg_goose_queue(rport);
2834
2835 return rport;
2836 }
2837 }
2838 }
2839
2840 /*
2841 * Search the bindings array
2842 * Note: if never a FCP target, you won't be on this list
2843 */
2844 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2845
2846 /* search for a matching consistent binding */
2847
2848 list_for_each_entry(rport, &fc_host->rport_bindings,
2849 peers) {
2850 if (rport->channel != channel)
2851 continue;
2852
2853 switch (fc_host->tgtid_bind_type) {
2854 case FC_TGTID_BIND_BY_WWPN:
2855 if (rport->port_name == ids->port_name)
2856 match = 1;
2857 break;
2858 case FC_TGTID_BIND_BY_WWNN:
2859 if (rport->node_name == ids->node_name)
2860 match = 1;
2861 break;
2862 case FC_TGTID_BIND_BY_ID:
2863 if (rport->port_id == ids->port_id)
2864 match = 1;
2865 break;
2866 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2867 break;
2868 }
2869
2870 if (match) {
2871 list_move_tail(&rport->peers, &fc_host->rports);
2872 break;
2873 }
2874 }
2875
2876 if (match) {
2877 memcpy(&rport->node_name, &ids->node_name,
2878 sizeof(rport->node_name));
2879 memcpy(&rport->port_name, &ids->port_name,
2880 sizeof(rport->port_name));
2881 rport->port_id = ids->port_id;
2882 rport->port_state = FC_PORTSTATE_ONLINE;
2883 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2884
2885 if (fci->f->dd_fcrport_size)
2886 memset(rport->dd_data, 0,
2887 fci->f->dd_fcrport_size);
2888 spin_unlock_irqrestore(shost->host_lock, flags);
2889
2890 fc_remote_port_rolechg(rport, ids->roles);
2891 return rport;
2892 }
2893 }
2894
2895 spin_unlock_irqrestore(shost->host_lock, flags);
2896
2897 /* No consistent binding found - create new remote port entry */
2898 rport = fc_remote_port_create(shost, channel, ids);
2899
2900 return rport;
2901 }
2902 EXPORT_SYMBOL(fc_remote_port_add);
2903
2904
2905 /**
2906 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2907 * @rport: The remote port that no longer exists
2908 *
2909 * The LLDD calls this routine to notify the transport that a remote
2910 * port is no longer part of the topology. Note: Although a port
2911 * may no longer be part of the topology, it may persist in the remote
2912 * ports displayed by the fc_host. We do this under 2 conditions:
2913 *
2914 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2915 * This allows the port to temporarily disappear, then reappear without
2916 * disrupting the SCSI device tree attached to it. During the "blocked"
2917 * period the port will still exist.
2918 *
2919 * 2) If the port was a scsi target and disappears for longer than we
2920 * expect, we'll delete the port and the tear down the SCSI device tree
2921 * attached to it. However, we want to semi-persist the target id assigned
2922 * to that port if it eventually does exist. The port structure will
2923 * remain (although with minimal information) so that the target id
2924 * bindings also remain.
2925 *
2926 * If the remote port is not an FCP Target, it will be fully torn down
2927 * and deallocated, including the fc_remote_port class device.
2928 *
2929 * If the remote port is an FCP Target, the port will be placed in a
2930 * temporary blocked state. From the LLDD's perspective, the rport no
2931 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2932 * exists, but all sdevs on it are blocked from further I/O. The following
2933 * is then expected.
2934 *
2935 * If the remote port does not return (signaled by a LLDD call to
2936 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2937 * scsi target is removed - killing all outstanding i/o and removing the
2938 * scsi devices attached to it. The port structure will be marked Not
2939 * Present and be partially cleared, leaving only enough information to
2940 * recognize the remote port relative to the scsi target id binding if
2941 * it later appears. The port will remain as long as there is a valid
2942 * binding (e.g. until the user changes the binding type or unloads the
2943 * scsi host with the binding).
2944 *
2945 * If the remote port returns within the dev_loss_tmo value (and matches
2946 * according to the target id binding type), the port structure will be
2947 * reused. If it is no longer a SCSI target, the target will be torn
2948 * down. If it continues to be a SCSI target, then the target will be
2949 * unblocked (allowing i/o to be resumed), and a scan will be activated
2950 * to ensure that all luns are detected.
2951 *
2952 * Called from normal process context only - cannot be called from interrupt.
2953 *
2954 * Notes:
2955 * This routine assumes no locks are held on entry.
2956 */
2957 void
2958 fc_remote_port_delete(struct fc_rport *rport)
2959 {
2960 struct Scsi_Host *shost = rport_to_shost(rport);
2961 unsigned long timeout = rport->dev_loss_tmo;
2962 unsigned long flags;
2963
2964 /*
2965 * No need to flush the fc_host work_q's, as all adds are synchronous.
2966 *
2967 * We do need to reclaim the rport scan work element, so eventually
2968 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2969 * there's still a scan pending.
2970 */
2971
2972 spin_lock_irqsave(shost->host_lock, flags);
2973
2974 if (rport->port_state != FC_PORTSTATE_ONLINE) {
2975 spin_unlock_irqrestore(shost->host_lock, flags);
2976 return;
2977 }
2978
2979 /*
2980 * In the past, we if this was not an FCP-Target, we would
2981 * unconditionally just jump to deleting the rport.
2982 * However, rports can be used as node containers by the LLDD,
2983 * and its not appropriate to just terminate the rport at the
2984 * first sign of a loss in connectivity. The LLDD may want to
2985 * send ELS traffic to re-validate the login. If the rport is
2986 * immediately deleted, it makes it inappropriate for a node
2987 * container.
2988 * So... we now unconditionally wait dev_loss_tmo before
2989 * destroying an rport.
2990 */
2991
2992 rport->port_state = FC_PORTSTATE_BLOCKED;
2993
2994 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2995
2996 spin_unlock_irqrestore(shost->host_lock, flags);
2997
2998 scsi_target_block(&rport->dev);
2999
3000 /* see if we need to kill io faster than waiting for device loss */
3001 if ((rport->fast_io_fail_tmo != -1) &&
3002 (rport->fast_io_fail_tmo < timeout))
3003 fc_queue_devloss_work(shost, &rport->fail_io_work,
3004 rport->fast_io_fail_tmo * HZ);
3005
3006 /* cap the length the devices can be blocked until they are deleted */
3007 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3008 }
3009 EXPORT_SYMBOL(fc_remote_port_delete);
3010
3011 /**
3012 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3013 * @rport: The remote port that changed.
3014 * @roles: New roles for this port.
3015 *
3016 * Description: The LLDD calls this routine to notify the transport that the
3017 * roles on a remote port may have changed. The largest effect of this is
3018 * if a port now becomes a FCP Target, it must be allocated a
3019 * scsi target id. If the port is no longer a FCP target, any
3020 * scsi target id value assigned to it will persist in case the
3021 * role changes back to include FCP Target. No changes in the scsi
3022 * midlayer will be invoked if the role changes (in the expectation
3023 * that the role will be resumed. If it doesn't normal error processing
3024 * will take place).
3025 *
3026 * Should not be called from interrupt context.
3027 *
3028 * Notes:
3029 * This routine assumes no locks are held on entry.
3030 */
3031 void
3032 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3033 {
3034 struct Scsi_Host *shost = rport_to_shost(rport);
3035 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3036 unsigned long flags;
3037 int create = 0;
3038
3039 spin_lock_irqsave(shost->host_lock, flags);
3040 if (roles & FC_PORT_ROLE_FCP_TARGET) {
3041 if (rport->scsi_target_id == -1) {
3042 rport->scsi_target_id = fc_host->next_target_id++;
3043 create = 1;
3044 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3045 create = 1;
3046 }
3047
3048 rport->roles = roles;
3049
3050 spin_unlock_irqrestore(shost->host_lock, flags);
3051
3052 if (create) {
3053 /*
3054 * There may have been a delete timer running on the
3055 * port. Ensure that it is cancelled as we now know
3056 * the port is an FCP Target.
3057 * Note: we know the rport exists and is in an online
3058 * state as the LLDD would not have had an rport
3059 * reference to pass us.
3060 *
3061 * Take no action on the del_timer failure as the state
3062 * machine state change will validate the
3063 * transaction.
3064 */
3065 if (!cancel_delayed_work(&rport->fail_io_work))
3066 fc_flush_devloss(shost);
3067 if (!cancel_delayed_work(&rport->dev_loss_work))
3068 fc_flush_devloss(shost);
3069
3070 spin_lock_irqsave(shost->host_lock, flags);
3071 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3072 FC_RPORT_DEVLOSS_PENDING |
3073 FC_RPORT_DEVLOSS_CALLBK_DONE);
3074 spin_unlock_irqrestore(shost->host_lock, flags);
3075
3076 /* ensure any stgt delete functions are done */
3077 fc_flush_work(shost);
3078
3079 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3080 /* initiate a scan of the target */
3081 spin_lock_irqsave(shost->host_lock, flags);
3082 rport->flags |= FC_RPORT_SCAN_PENDING;
3083 scsi_queue_work(shost, &rport->scan_work);
3084 spin_unlock_irqrestore(shost->host_lock, flags);
3085 }
3086 }
3087 EXPORT_SYMBOL(fc_remote_port_rolechg);
3088
3089 /**
3090 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3091 * @work: rport target that failed to reappear in the allotted time.
3092 *
3093 * Description: An attempt to delete a remote port blocks, and if it fails
3094 * to return in the allotted time this gets called.
3095 */
3096 static void
3097 fc_timeout_deleted_rport(struct work_struct *work)
3098 {
3099 struct fc_rport *rport =
3100 container_of(work, struct fc_rport, dev_loss_work.work);
3101 struct Scsi_Host *shost = rport_to_shost(rport);
3102 struct fc_internal *i = to_fc_internal(shost->transportt);
3103 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3104 unsigned long flags;
3105 int do_callback = 0;
3106
3107 spin_lock_irqsave(shost->host_lock, flags);
3108
3109 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3110
3111 /*
3112 * If the port is ONLINE, then it came back. If it was a SCSI
3113 * target, validate it still is. If not, tear down the
3114 * scsi_target on it.
3115 */
3116 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3117 (rport->scsi_target_id != -1) &&
3118 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3119 dev_printk(KERN_ERR, &rport->dev,
3120 "blocked FC remote port time out: no longer"
3121 " a FCP target, removing starget\n");
3122 spin_unlock_irqrestore(shost->host_lock, flags);
3123 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3124 fc_queue_work(shost, &rport->stgt_delete_work);
3125 return;
3126 }
3127
3128 /* NOOP state - we're flushing workq's */
3129 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3130 spin_unlock_irqrestore(shost->host_lock, flags);
3131 dev_printk(KERN_ERR, &rport->dev,
3132 "blocked FC remote port time out: leaving"
3133 " rport%s alone\n",
3134 (rport->scsi_target_id != -1) ? " and starget" : "");
3135 return;
3136 }
3137
3138 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3139 (rport->scsi_target_id == -1)) {
3140 list_del(&rport->peers);
3141 rport->port_state = FC_PORTSTATE_DELETED;
3142 dev_printk(KERN_ERR, &rport->dev,
3143 "blocked FC remote port time out: removing"
3144 " rport%s\n",
3145 (rport->scsi_target_id != -1) ? " and starget" : "");
3146 fc_queue_work(shost, &rport->rport_delete_work);
3147 spin_unlock_irqrestore(shost->host_lock, flags);
3148 return;
3149 }
3150
3151 dev_printk(KERN_ERR, &rport->dev,
3152 "blocked FC remote port time out: removing target and "
3153 "saving binding\n");
3154
3155 list_move_tail(&rport->peers, &fc_host->rport_bindings);
3156
3157 /*
3158 * Note: We do not remove or clear the hostdata area. This allows
3159 * host-specific target data to persist along with the
3160 * scsi_target_id. It's up to the host to manage it's hostdata area.
3161 */
3162
3163 /*
3164 * Reinitialize port attributes that may change if the port comes back.
3165 */
3166 rport->maxframe_size = -1;
3167 rport->supported_classes = FC_COS_UNSPECIFIED;
3168 rport->roles = FC_PORT_ROLE_UNKNOWN;
3169 rport->port_state = FC_PORTSTATE_NOTPRESENT;
3170 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3171
3172 /*
3173 * Pre-emptively kill I/O rather than waiting for the work queue
3174 * item to teardown the starget. (FCOE libFC folks prefer this
3175 * and to have the rport_port_id still set when it's done).
3176 */
3177 spin_unlock_irqrestore(shost->host_lock, flags);
3178 fc_terminate_rport_io(rport);
3179
3180 spin_lock_irqsave(shost->host_lock, flags);
3181
3182 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3183
3184 /* remove the identifiers that aren't used in the consisting binding */
3185 switch (fc_host->tgtid_bind_type) {
3186 case FC_TGTID_BIND_BY_WWPN:
3187 rport->node_name = -1;
3188 rport->port_id = -1;
3189 break;
3190 case FC_TGTID_BIND_BY_WWNN:
3191 rport->port_name = -1;
3192 rport->port_id = -1;
3193 break;
3194 case FC_TGTID_BIND_BY_ID:
3195 rport->node_name = -1;
3196 rport->port_name = -1;
3197 break;
3198 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3199 break;
3200 }
3201
3202 /*
3203 * As this only occurs if the remote port (scsi target)
3204 * went away and didn't come back - we'll remove
3205 * all attached scsi devices.
3206 */
3207 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3208 fc_queue_work(shost, &rport->stgt_delete_work);
3209
3210 do_callback = 1;
3211 }
3212
3213 spin_unlock_irqrestore(shost->host_lock, flags);
3214
3215 /*
3216 * Notify the driver that the rport is now dead. The LLDD will
3217 * also guarantee that any communication to the rport is terminated
3218 *
3219 * Note: we set the CALLBK_DONE flag above to correspond
3220 */
3221 if (do_callback && i->f->dev_loss_tmo_callbk)
3222 i->f->dev_loss_tmo_callbk(rport);
3223 }
3224
3225
3226 /**
3227 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3228 * @work: rport to terminate io on.
3229 *
3230 * Notes: Only requests the failure of the io, not that all are flushed
3231 * prior to returning.
3232 */
3233 static void
3234 fc_timeout_fail_rport_io(struct work_struct *work)
3235 {
3236 struct fc_rport *rport =
3237 container_of(work, struct fc_rport, fail_io_work.work);
3238
3239 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3240 return;
3241
3242 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3243 fc_terminate_rport_io(rport);
3244 }
3245
3246 /**
3247 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3248 * @work: remote port to be scanned.
3249 */
3250 static void
3251 fc_scsi_scan_rport(struct work_struct *work)
3252 {
3253 struct fc_rport *rport =
3254 container_of(work, struct fc_rport, scan_work);
3255 struct Scsi_Host *shost = rport_to_shost(rport);
3256 struct fc_internal *i = to_fc_internal(shost->transportt);
3257 unsigned long flags;
3258
3259 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3260 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3261 !(i->f->disable_target_scan)) {
3262 scsi_scan_target(&rport->dev, rport->channel,
3263 rport->scsi_target_id, SCAN_WILD_CARD,
3264 SCSI_SCAN_RESCAN);
3265 }
3266
3267 spin_lock_irqsave(shost->host_lock, flags);
3268 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3269 spin_unlock_irqrestore(shost->host_lock, flags);
3270 }
3271
3272 /**
3273 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
3274 * @rport: Remote port that scsi_eh is trying to recover.
3275 *
3276 * This routine can be called from a FC LLD scsi_eh callback. It
3277 * blocks the scsi_eh thread until the fc_rport leaves the
3278 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3279 * necessary to avoid the scsi_eh failing recovery actions for blocked
3280 * rports which would lead to offlined SCSI devices.
3281 *
3282 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3283 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3284 * passed back to scsi_eh.
3285 */
3286 int fc_block_rport(struct fc_rport *rport)
3287 {
3288 struct Scsi_Host *shost = rport_to_shost(rport);
3289 unsigned long flags;
3290
3291 spin_lock_irqsave(shost->host_lock, flags);
3292 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3293 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3294 spin_unlock_irqrestore(shost->host_lock, flags);
3295 msleep(1000);
3296 spin_lock_irqsave(shost->host_lock, flags);
3297 }
3298 spin_unlock_irqrestore(shost->host_lock, flags);
3299
3300 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3301 return FAST_IO_FAIL;
3302
3303 return 0;
3304 }
3305 EXPORT_SYMBOL(fc_block_rport);
3306
3307 /**
3308 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3309 * @cmnd: SCSI command that scsi_eh is trying to recover
3310 *
3311 * This routine can be called from a FC LLD scsi_eh callback. It
3312 * blocks the scsi_eh thread until the fc_rport leaves the
3313 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3314 * necessary to avoid the scsi_eh failing recovery actions for blocked
3315 * rports which would lead to offlined SCSI devices.
3316 *
3317 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3318 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3319 * passed back to scsi_eh.
3320 */
3321 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3322 {
3323 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3324
3325 if (WARN_ON_ONCE(!rport))
3326 return FAST_IO_FAIL;
3327
3328 return fc_block_rport(rport);
3329 }
3330 EXPORT_SYMBOL(fc_block_scsi_eh);
3331
3332 /**
3333 * fc_vport_setup - allocates and creates a FC virtual port.
3334 * @shost: scsi host the virtual port is connected to.
3335 * @channel: Channel on shost port connected to.
3336 * @pdev: parent device for vport
3337 * @ids: The world wide names, FC4 port roles, etc for
3338 * the virtual port.
3339 * @ret_vport: The pointer to the created vport.
3340 *
3341 * Allocates and creates the vport structure, calls the parent host
3342 * to instantiate the vport, this completes w/ class and sysfs creation.
3343 *
3344 * Notes:
3345 * This routine assumes no locks are held on entry.
3346 */
3347 static int
3348 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3349 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3350 {
3351 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3352 struct fc_internal *fci = to_fc_internal(shost->transportt);
3353 struct fc_vport *vport;
3354 struct device *dev;
3355 unsigned long flags;
3356 size_t size;
3357 int error;
3358
3359 *ret_vport = NULL;
3360
3361 if ( ! fci->f->vport_create)
3362 return -ENOENT;
3363
3364 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3365 vport = kzalloc(size, GFP_KERNEL);
3366 if (unlikely(!vport)) {
3367 printk(KERN_ERR "%s: allocation failure\n", __func__);
3368 return -ENOMEM;
3369 }
3370
3371 vport->vport_state = FC_VPORT_UNKNOWN;
3372 vport->vport_last_state = FC_VPORT_UNKNOWN;
3373 vport->node_name = ids->node_name;
3374 vport->port_name = ids->port_name;
3375 vport->roles = ids->roles;
3376 vport->vport_type = ids->vport_type;
3377 if (fci->f->dd_fcvport_size)
3378 vport->dd_data = &vport[1];
3379 vport->shost = shost;
3380 vport->channel = channel;
3381 vport->flags = FC_VPORT_CREATING;
3382 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3383
3384 spin_lock_irqsave(shost->host_lock, flags);
3385
3386 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3387 spin_unlock_irqrestore(shost->host_lock, flags);
3388 kfree(vport);
3389 return -ENOSPC;
3390 }
3391 fc_host->npiv_vports_inuse++;
3392 vport->number = fc_host->next_vport_number++;
3393 list_add_tail(&vport->peers, &fc_host->vports);
3394 scsi_host_get(shost); /* for fc_host->vport list */
3395
3396 spin_unlock_irqrestore(shost->host_lock, flags);
3397
3398 dev = &vport->dev;
3399 device_initialize(dev); /* takes self reference */
3400 dev->parent = get_device(pdev); /* takes parent reference */
3401 dev->release = fc_vport_dev_release;
3402 dev_set_name(dev, "vport-%d:%d-%d",
3403 shost->host_no, channel, vport->number);
3404 transport_setup_device(dev);
3405
3406 error = device_add(dev);
3407 if (error) {
3408 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3409 goto delete_vport;
3410 }
3411 transport_add_device(dev);
3412 transport_configure_device(dev);
3413
3414 error = fci->f->vport_create(vport, ids->disable);
3415 if (error) {
3416 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3417 goto delete_vport_all;
3418 }
3419
3420 /*
3421 * if the parent isn't the physical adapter's Scsi_Host, ensure
3422 * the Scsi_Host at least contains a symlink to the vport.
3423 */
3424 if (pdev != &shost->shost_gendev) {
3425 error = sysfs_create_link(&shost->shost_gendev.kobj,
3426 &dev->kobj, dev_name(dev));
3427 if (error)
3428 printk(KERN_ERR
3429 "%s: Cannot create vport symlinks for "
3430 "%s, err=%d\n",
3431 __func__, dev_name(dev), error);
3432 }
3433 spin_lock_irqsave(shost->host_lock, flags);
3434 vport->flags &= ~FC_VPORT_CREATING;
3435 spin_unlock_irqrestore(shost->host_lock, flags);
3436
3437 dev_printk(KERN_NOTICE, pdev,
3438 "%s created via shost%d channel %d\n", dev_name(dev),
3439 shost->host_no, channel);
3440
3441 *ret_vport = vport;
3442
3443 return 0;
3444
3445 delete_vport_all:
3446 transport_remove_device(dev);
3447 device_del(dev);
3448 delete_vport:
3449 transport_destroy_device(dev);
3450 spin_lock_irqsave(shost->host_lock, flags);
3451 list_del(&vport->peers);
3452 scsi_host_put(shost); /* for fc_host->vport list */
3453 fc_host->npiv_vports_inuse--;
3454 spin_unlock_irqrestore(shost->host_lock, flags);
3455 put_device(dev->parent);
3456 kfree(vport);
3457
3458 return error;
3459 }
3460
3461 /**
3462 * fc_vport_create - Admin App or LLDD requests creation of a vport
3463 * @shost: scsi host the virtual port is connected to.
3464 * @channel: channel on shost port connected to.
3465 * @ids: The world wide names, FC4 port roles, etc for
3466 * the virtual port.
3467 *
3468 * Notes:
3469 * This routine assumes no locks are held on entry.
3470 */
3471 struct fc_vport *
3472 fc_vport_create(struct Scsi_Host *shost, int channel,
3473 struct fc_vport_identifiers *ids)
3474 {
3475 int stat;
3476 struct fc_vport *vport;
3477
3478 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3479 ids, &vport);
3480 return stat ? NULL : vport;
3481 }
3482 EXPORT_SYMBOL(fc_vport_create);
3483
3484 /**
3485 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3486 * @vport: fc_vport to be terminated
3487 *
3488 * Calls the LLDD vport_delete() function, then deallocates and removes
3489 * the vport from the shost and object tree.
3490 *
3491 * Notes:
3492 * This routine assumes no locks are held on entry.
3493 */
3494 int
3495 fc_vport_terminate(struct fc_vport *vport)
3496 {
3497 struct Scsi_Host *shost = vport_to_shost(vport);
3498 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3499 struct fc_internal *i = to_fc_internal(shost->transportt);
3500 struct device *dev = &vport->dev;
3501 unsigned long flags;
3502 int stat;
3503
3504 if (i->f->vport_delete)
3505 stat = i->f->vport_delete(vport);
3506 else
3507 stat = -ENOENT;
3508
3509 spin_lock_irqsave(shost->host_lock, flags);
3510 vport->flags &= ~FC_VPORT_DELETING;
3511 if (!stat) {
3512 vport->flags |= FC_VPORT_DELETED;
3513 list_del(&vport->peers);
3514 fc_host->npiv_vports_inuse--;
3515 scsi_host_put(shost); /* for fc_host->vport list */
3516 }
3517 spin_unlock_irqrestore(shost->host_lock, flags);
3518
3519 if (stat)
3520 return stat;
3521
3522 if (dev->parent != &shost->shost_gendev)
3523 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3524 transport_remove_device(dev);
3525 device_del(dev);
3526 transport_destroy_device(dev);
3527
3528 /*
3529 * Removing our self-reference should mean our
3530 * release function gets called, which will drop the remaining
3531 * parent reference and free the data structure.
3532 */
3533 put_device(dev); /* for self-reference */
3534
3535 return 0; /* SUCCESS */
3536 }
3537 EXPORT_SYMBOL(fc_vport_terminate);
3538
3539 /**
3540 * fc_vport_sched_delete - workq-based delete request for a vport
3541 * @work: vport to be deleted.
3542 */
3543 static void
3544 fc_vport_sched_delete(struct work_struct *work)
3545 {
3546 struct fc_vport *vport =
3547 container_of(work, struct fc_vport, vport_delete_work);
3548 int stat;
3549
3550 stat = fc_vport_terminate(vport);
3551 if (stat)
3552 dev_printk(KERN_ERR, vport->dev.parent,
3553 "%s: %s could not be deleted created via "
3554 "shost%d channel %d - error %d\n", __func__,
3555 dev_name(&vport->dev), vport->shost->host_no,
3556 vport->channel, stat);
3557 }
3558
3559
3560 /*
3561 * BSG support
3562 */
3563
3564 /**
3565 * fc_bsg_job_timeout - handler for when a bsg request timesout
3566 * @req: request that timed out
3567 */
3568 static enum blk_eh_timer_return
3569 fc_bsg_job_timeout(struct request *req)
3570 {
3571 struct bsg_job *job = blk_mq_rq_to_pdu(req);
3572 struct Scsi_Host *shost = fc_bsg_to_shost(job);
3573 struct fc_rport *rport = fc_bsg_to_rport(job);
3574 struct fc_internal *i = to_fc_internal(shost->transportt);
3575 int err = 0, inflight = 0;
3576
3577 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
3578 return BLK_EH_RESET_TIMER;
3579
3580 inflight = bsg_job_get(job);
3581
3582 if (inflight && i->f->bsg_timeout) {
3583 /* call LLDD to abort the i/o as it has timed out */
3584 err = i->f->bsg_timeout(job);
3585 if (err == -EAGAIN) {
3586 bsg_job_put(job);
3587 return BLK_EH_RESET_TIMER;
3588 } else if (err)
3589 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3590 "abort failed with status %d\n", err);
3591 }
3592
3593 /* the blk_end_sync_io() doesn't check the error */
3594 if (inflight)
3595 blk_mq_end_request(req, BLK_STS_IOERR);
3596 return BLK_EH_DONE;
3597 }
3598
3599 /**
3600 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3601 * @shost: scsi host rport attached to
3602 * @job: bsg job to be processed
3603 */
3604 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3605 {
3606 struct fc_internal *i = to_fc_internal(shost->transportt);
3607 struct fc_bsg_request *bsg_request = job->request;
3608 struct fc_bsg_reply *bsg_reply = job->reply;
3609 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3610 int ret;
3611
3612 /* check if we really have all the request data needed */
3613 if (job->request_len < cmdlen) {
3614 ret = -ENOMSG;
3615 goto fail_host_msg;
3616 }
3617
3618 /* Validate the host command */
3619 switch (bsg_request->msgcode) {
3620 case FC_BSG_HST_ADD_RPORT:
3621 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3622 break;
3623
3624 case FC_BSG_HST_DEL_RPORT:
3625 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3626 break;
3627
3628 case FC_BSG_HST_ELS_NOLOGIN:
3629 cmdlen += sizeof(struct fc_bsg_host_els);
3630 /* there better be a xmt and rcv payloads */
3631 if ((!job->request_payload.payload_len) ||
3632 (!job->reply_payload.payload_len)) {
3633 ret = -EINVAL;
3634 goto fail_host_msg;
3635 }
3636 break;
3637
3638 case FC_BSG_HST_CT:
3639 cmdlen += sizeof(struct fc_bsg_host_ct);
3640 /* there better be xmt and rcv payloads */
3641 if ((!job->request_payload.payload_len) ||
3642 (!job->reply_payload.payload_len)) {
3643 ret = -EINVAL;
3644 goto fail_host_msg;
3645 }
3646 break;
3647
3648 case FC_BSG_HST_VENDOR:
3649 cmdlen += sizeof(struct fc_bsg_host_vendor);
3650 if ((shost->hostt->vendor_id == 0L) ||
3651 (bsg_request->rqst_data.h_vendor.vendor_id !=
3652 shost->hostt->vendor_id)) {
3653 ret = -ESRCH;
3654 goto fail_host_msg;
3655 }
3656 break;
3657
3658 default:
3659 ret = -EBADR;
3660 goto fail_host_msg;
3661 }
3662
3663 ret = i->f->bsg_request(job);
3664 if (!ret)
3665 return 0;
3666
3667 fail_host_msg:
3668 /* return the errno failure code as the only status */
3669 BUG_ON(job->reply_len < sizeof(uint32_t));
3670 bsg_reply->reply_payload_rcv_len = 0;
3671 bsg_reply->result = ret;
3672 job->reply_len = sizeof(uint32_t);
3673 bsg_job_done(job, bsg_reply->result,
3674 bsg_reply->reply_payload_rcv_len);
3675 return 0;
3676 }
3677
3678
3679 /*
3680 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3681 * @rport: rport to be restarted
3682 */
3683 static void
3684 fc_bsg_goose_queue(struct fc_rport *rport)
3685 {
3686 struct request_queue *q = rport->rqst_q;
3687
3688 if (q)
3689 blk_mq_run_hw_queues(q, true);
3690 }
3691
3692 /**
3693 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3694 * @shost: scsi host rport attached to
3695 * @job: bsg job to be processed
3696 */
3697 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3698 {
3699 struct fc_internal *i = to_fc_internal(shost->transportt);
3700 struct fc_bsg_request *bsg_request = job->request;
3701 struct fc_bsg_reply *bsg_reply = job->reply;
3702 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3703 int ret;
3704
3705 /* check if we really have all the request data needed */
3706 if (job->request_len < cmdlen) {
3707 ret = -ENOMSG;
3708 goto fail_rport_msg;
3709 }
3710
3711 /* Validate the rport command */
3712 switch (bsg_request->msgcode) {
3713 case FC_BSG_RPT_ELS:
3714 cmdlen += sizeof(struct fc_bsg_rport_els);
3715 goto check_bidi;
3716
3717 case FC_BSG_RPT_CT:
3718 cmdlen += sizeof(struct fc_bsg_rport_ct);
3719 check_bidi:
3720 /* there better be xmt and rcv payloads */
3721 if ((!job->request_payload.payload_len) ||
3722 (!job->reply_payload.payload_len)) {
3723 ret = -EINVAL;
3724 goto fail_rport_msg;
3725 }
3726 break;
3727 default:
3728 ret = -EBADR;
3729 goto fail_rport_msg;
3730 }
3731
3732 ret = i->f->bsg_request(job);
3733 if (!ret)
3734 return 0;
3735
3736 fail_rport_msg:
3737 /* return the errno failure code as the only status */
3738 BUG_ON(job->reply_len < sizeof(uint32_t));
3739 bsg_reply->reply_payload_rcv_len = 0;
3740 bsg_reply->result = ret;
3741 job->reply_len = sizeof(uint32_t);
3742 bsg_job_done(job, bsg_reply->result,
3743 bsg_reply->reply_payload_rcv_len);
3744 return 0;
3745 }
3746
3747 static int fc_bsg_dispatch(struct bsg_job *job)
3748 {
3749 struct Scsi_Host *shost = fc_bsg_to_shost(job);
3750
3751 if (scsi_is_fc_rport(job->dev))
3752 return fc_bsg_rport_dispatch(shost, job);
3753 else
3754 return fc_bsg_host_dispatch(shost, job);
3755 }
3756
3757 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport)
3758 {
3759 if (rport->port_state == FC_PORTSTATE_BLOCKED &&
3760 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3761 return BLK_STS_RESOURCE;
3762
3763 if (rport->port_state != FC_PORTSTATE_ONLINE)
3764 return BLK_STS_IOERR;
3765
3766 return BLK_STS_OK;
3767 }
3768
3769
3770 static int fc_bsg_dispatch_prep(struct bsg_job *job)
3771 {
3772 struct fc_rport *rport = fc_bsg_to_rport(job);
3773 blk_status_t ret;
3774
3775 ret = fc_bsg_rport_prep(rport);
3776 switch (ret) {
3777 case BLK_STS_OK:
3778 break;
3779 case BLK_STS_RESOURCE:
3780 return -EAGAIN;
3781 default:
3782 return -EIO;
3783 }
3784
3785 return fc_bsg_dispatch(job);
3786 }
3787
3788 /**
3789 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3790 * @shost: shost for fc_host
3791 * @fc_host: fc_host adding the structures to
3792 */
3793 static int
3794 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3795 {
3796 struct device *dev = &shost->shost_gendev;
3797 struct fc_internal *i = to_fc_internal(shost->transportt);
3798 struct request_queue *q;
3799 char bsg_name[20];
3800
3801 fc_host->rqst_q = NULL;
3802
3803 if (!i->f->bsg_request)
3804 return -ENOTSUPP;
3805
3806 snprintf(bsg_name, sizeof(bsg_name),
3807 "fc_host%d", shost->host_no);
3808
3809 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout,
3810 i->f->dd_bsg_size);
3811 if (IS_ERR(q)) {
3812 dev_err(dev,
3813 "fc_host%d: bsg interface failed to initialize - setup queue\n",
3814 shost->host_no);
3815 return PTR_ERR(q);
3816 }
3817 __scsi_init_queue(shost, q);
3818 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
3819 fc_host->rqst_q = q;
3820 return 0;
3821 }
3822
3823 /**
3824 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3825 * @shost: shost that rport is attached to
3826 * @rport: rport that the bsg hooks are being attached to
3827 */
3828 static int
3829 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3830 {
3831 struct device *dev = &rport->dev;
3832 struct fc_internal *i = to_fc_internal(shost->transportt);
3833 struct request_queue *q;
3834
3835 rport->rqst_q = NULL;
3836
3837 if (!i->f->bsg_request)
3838 return -ENOTSUPP;
3839
3840 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep,
3841 fc_bsg_job_timeout, i->f->dd_bsg_size);
3842 if (IS_ERR(q)) {
3843 dev_err(dev, "failed to setup bsg queue\n");
3844 return PTR_ERR(q);
3845 }
3846 __scsi_init_queue(shost, q);
3847 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
3848 rport->rqst_q = q;
3849 return 0;
3850 }
3851
3852
3853 /**
3854 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3855 * @q: the request_queue that is to be torn down.
3856 *
3857 * Notes:
3858 * Before unregistering the queue empty any requests that are blocked
3859 *
3860 *
3861 */
3862 static void
3863 fc_bsg_remove(struct request_queue *q)
3864 {
3865 bsg_remove_queue(q);
3866 }
3867
3868
3869 /* Original Author: Martin Hicks */
3870 MODULE_AUTHOR("James Smart");
3871 MODULE_DESCRIPTION("FC Transport Attributes");
3872 MODULE_LICENSE("GPL");
3873
3874 module_init(fc_transport_init);
3875 module_exit(fc_transport_exit);
Linux with added FPC-III support