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lkdtm: Add Control Flow Integrity test
[linux/fpc-iii.git] / drivers / scsi / scsi_transport_fc.c
blob2732fa65119c485891c5a25666cc768b21b6ea04
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * FiberChannel transport specific attributes exported to sysfs.
4 *
5 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
6 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
7 * Rewrite for host, target, device, and remote port attributes,
8 * statistics, and service functions...
9 * Add vports, etc
10 */
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/delay.h>
15 #include <linux/kernel.h>
16 #include <linux/bsg-lib.h>
17 #include <scsi/scsi_device.h>
18 #include <scsi/scsi_host.h>
19 #include <scsi/scsi_transport.h>
20 #include <scsi/scsi_transport_fc.h>
21 #include <scsi/scsi_cmnd.h>
22 #include <net/netlink.h>
23 #include <scsi/scsi_netlink_fc.h>
24 #include <scsi/scsi_bsg_fc.h>
25 #include "scsi_priv.h"
26
27 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
28 static void fc_vport_sched_delete(struct work_struct *work);
29 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
30 struct device *pdev, struct fc_vport_identifiers *ids,
31 struct fc_vport **vport);
32 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
33 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
34 static void fc_bsg_remove(struct request_queue *);
35 static void fc_bsg_goose_queue(struct fc_rport *);
36
37 /*
38 * Module Parameters
39 */
40
41 /*
42 * dev_loss_tmo: the default number of seconds that the FC transport
43 * should insulate the loss of a remote port.
44 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
45 */
46 static unsigned int fc_dev_loss_tmo = 60; /* seconds */
47
48 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
49 MODULE_PARM_DESC(dev_loss_tmo,
50 "Maximum number of seconds that the FC transport should"
51 " insulate the loss of a remote port. Once this value is"
52 " exceeded, the scsi target is removed. Value should be"
53 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
54 " fast_io_fail_tmo is not set.");
55
56 /*
57 * Redefine so that we can have same named attributes in the
58 * sdev/starget/host objects.
59 */
60 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
61 struct device_attribute device_attr_##_prefix##_##_name = \
62 __ATTR(_name,_mode,_show,_store)
63
64 #define fc_enum_name_search(title, table_type, table) \
65 static const char *get_fc_##title##_name(enum table_type table_key) \
66 { \
67 int i; \
68 char *name = NULL; \
69 \
70 for (i = 0; i < ARRAY_SIZE(table); i++) { \
71 if (table[i].value == table_key) { \
72 name = table[i].name; \
73 break; \
74 } \
75 } \
76 return name; \
77 }
78
79 #define fc_enum_name_match(title, table_type, table) \
80 static int get_fc_##title##_match(const char *table_key, \
81 enum table_type *value) \
82 { \
83 int i; \
84 \
85 for (i = 0; i < ARRAY_SIZE(table); i++) { \
86 if (strncmp(table_key, table[i].name, \
87 table[i].matchlen) == 0) { \
88 *value = table[i].value; \
89 return 0; /* success */ \
90 } \
91 } \
92 return 1; /* failure */ \
93 }
94
95
96 /* Convert fc_port_type values to ascii string name */
97 static struct {
98 enum fc_port_type value;
99 char *name;
100 } fc_port_type_names[] = {
101 { FC_PORTTYPE_UNKNOWN, "Unknown" },
102 { FC_PORTTYPE_OTHER, "Other" },
103 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
104 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
105 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
106 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
107 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
108 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
109 };
110 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
111 #define FC_PORTTYPE_MAX_NAMELEN 50
112
113 /* Reuse fc_port_type enum function for vport_type */
114 #define get_fc_vport_type_name get_fc_port_type_name
115
116
117 /* Convert fc_host_event_code values to ascii string name */
118 static const struct {
119 enum fc_host_event_code value;
120 char *name;
121 } fc_host_event_code_names[] = {
122 { FCH_EVT_LIP, "lip" },
123 { FCH_EVT_LINKUP, "link_up" },
124 { FCH_EVT_LINKDOWN, "link_down" },
125 { FCH_EVT_LIPRESET, "lip_reset" },
126 { FCH_EVT_RSCN, "rscn" },
127 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
128 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
129 { FCH_EVT_PORT_ONLINE, "port_online" },
130 { FCH_EVT_PORT_OFFLINE, "port_offline" },
131 { FCH_EVT_PORT_FABRIC, "port_fabric" },
132 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
133 { FCH_EVT_LINK_FPIN, "link_FPIN" },
134 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
135 };
136 fc_enum_name_search(host_event_code, fc_host_event_code,
137 fc_host_event_code_names)
138 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
139
140
141 /* Convert fc_port_state values to ascii string name */
142 static struct {
143 enum fc_port_state value;
144 char *name;
145 } fc_port_state_names[] = {
146 { FC_PORTSTATE_UNKNOWN, "Unknown" },
147 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
148 { FC_PORTSTATE_ONLINE, "Online" },
149 { FC_PORTSTATE_OFFLINE, "Offline" },
150 { FC_PORTSTATE_BLOCKED, "Blocked" },
151 { FC_PORTSTATE_BYPASSED, "Bypassed" },
152 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
153 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
154 { FC_PORTSTATE_ERROR, "Error" },
155 { FC_PORTSTATE_LOOPBACK, "Loopback" },
156 { FC_PORTSTATE_DELETED, "Deleted" },
157 };
158 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
159 #define FC_PORTSTATE_MAX_NAMELEN 20
160
161
162 /* Convert fc_vport_state values to ascii string name */
163 static struct {
164 enum fc_vport_state value;
165 char *name;
166 } fc_vport_state_names[] = {
167 { FC_VPORT_UNKNOWN, "Unknown" },
168 { FC_VPORT_ACTIVE, "Active" },
169 { FC_VPORT_DISABLED, "Disabled" },
170 { FC_VPORT_LINKDOWN, "Linkdown" },
171 { FC_VPORT_INITIALIZING, "Initializing" },
172 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
173 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
174 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
175 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
176 { FC_VPORT_FAILED, "VPort Failed" },
177 };
178 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
179 #define FC_VPORTSTATE_MAX_NAMELEN 24
180
181 /* Reuse fc_vport_state enum function for vport_last_state */
182 #define get_fc_vport_last_state_name get_fc_vport_state_name
183
184
185 /* Convert fc_tgtid_binding_type values to ascii string name */
186 static const struct {
187 enum fc_tgtid_binding_type value;
188 char *name;
189 int matchlen;
190 } fc_tgtid_binding_type_names[] = {
191 { FC_TGTID_BIND_NONE, "none", 4 },
192 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
193 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
194 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
195 };
196 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
197 fc_tgtid_binding_type_names)
198 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
199 fc_tgtid_binding_type_names)
200 #define FC_BINDTYPE_MAX_NAMELEN 30
201
202
203 #define fc_bitfield_name_search(title, table) \
204 static ssize_t \
205 get_fc_##title##_names(u32 table_key, char *buf) \
206 { \
207 char *prefix = ""; \
208 ssize_t len = 0; \
209 int i; \
210 \
211 for (i = 0; i < ARRAY_SIZE(table); i++) { \
212 if (table[i].value & table_key) { \
213 len += sprintf(buf + len, "%s%s", \
214 prefix, table[i].name); \
215 prefix = ", "; \
216 } \
217 } \
218 len += sprintf(buf + len, "\n"); \
219 return len; \
220 }
221
222
223 /* Convert FC_COS bit values to ascii string name */
224 static const struct {
225 u32 value;
226 char *name;
227 } fc_cos_names[] = {
228 { FC_COS_CLASS1, "Class 1" },
229 { FC_COS_CLASS2, "Class 2" },
230 { FC_COS_CLASS3, "Class 3" },
231 { FC_COS_CLASS4, "Class 4" },
232 { FC_COS_CLASS6, "Class 6" },
233 };
234 fc_bitfield_name_search(cos, fc_cos_names)
235
236
237 /* Convert FC_PORTSPEED bit values to ascii string name */
238 static const struct {
239 u32 value;
240 char *name;
241 } fc_port_speed_names[] = {
242 { FC_PORTSPEED_1GBIT, "1 Gbit" },
243 { FC_PORTSPEED_2GBIT, "2 Gbit" },
244 { FC_PORTSPEED_4GBIT, "4 Gbit" },
245 { FC_PORTSPEED_10GBIT, "10 Gbit" },
246 { FC_PORTSPEED_8GBIT, "8 Gbit" },
247 { FC_PORTSPEED_16GBIT, "16 Gbit" },
248 { FC_PORTSPEED_32GBIT, "32 Gbit" },
249 { FC_PORTSPEED_20GBIT, "20 Gbit" },
250 { FC_PORTSPEED_40GBIT, "40 Gbit" },
251 { FC_PORTSPEED_50GBIT, "50 Gbit" },
252 { FC_PORTSPEED_100GBIT, "100 Gbit" },
253 { FC_PORTSPEED_25GBIT, "25 Gbit" },
254 { FC_PORTSPEED_64GBIT, "64 Gbit" },
255 { FC_PORTSPEED_128GBIT, "128 Gbit" },
256 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
257 };
258 fc_bitfield_name_search(port_speed, fc_port_speed_names)
259
260
261 static int
262 show_fc_fc4s (char *buf, u8 *fc4_list)
263 {
264 int i, len=0;
265
266 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
267 len += sprintf(buf + len , "0x%02x ", *fc4_list);
268 len += sprintf(buf + len, "\n");
269 return len;
270 }
271
272
273 /* Convert FC_PORT_ROLE bit values to ascii string name */
274 static const struct {
275 u32 value;
276 char *name;
277 } fc_port_role_names[] = {
278 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
279 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
280 { FC_PORT_ROLE_IP_PORT, "IP Port" },
281 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" },
282 { FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" },
283 { FC_PORT_ROLE_NVME_TARGET, "NVMe Target" },
284 { FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" },
285 };
286 fc_bitfield_name_search(port_roles, fc_port_role_names)
287
288 /*
289 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
290 */
291 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
292 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
293 #define FC_FPORT_PORTID 0x00000e
294 #define FC_FABCTLR_PORTID 0x00000d
295 #define FC_DIRSRVR_PORTID 0x00000c
296 #define FC_TIMESRVR_PORTID 0x00000b
297 #define FC_MGMTSRVR_PORTID 0x00000a
298
299
300 static void fc_timeout_deleted_rport(struct work_struct *work);
301 static void fc_timeout_fail_rport_io(struct work_struct *work);
302 static void fc_scsi_scan_rport(struct work_struct *work);
303
304 /*
305 * Attribute counts pre object type...
306 * Increase these values if you add attributes
307 */
308 #define FC_STARGET_NUM_ATTRS 3
309 #define FC_RPORT_NUM_ATTRS 10
310 #define FC_VPORT_NUM_ATTRS 9
311 #define FC_HOST_NUM_ATTRS 29
312
313 struct fc_internal {
314 struct scsi_transport_template t;
315 struct fc_function_template *f;
316
317 /*
318 * For attributes : each object has :
319 * An array of the actual attributes structures
320 * An array of null-terminated pointers to the attribute
321 * structures - used for mid-layer interaction.
322 *
323 * The attribute containers for the starget and host are are
324 * part of the midlayer. As the remote port is specific to the
325 * fc transport, we must provide the attribute container.
326 */
327 struct device_attribute private_starget_attrs[
328 FC_STARGET_NUM_ATTRS];
329 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
330
331 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
332 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
333
334 struct transport_container rport_attr_cont;
335 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
336 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
337
338 struct transport_container vport_attr_cont;
339 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
340 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
341 };
342
343 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
344
345 static int fc_target_setup(struct transport_container *tc, struct device *dev,
346 struct device *cdev)
347 {
348 struct scsi_target *starget = to_scsi_target(dev);
349 struct fc_rport *rport = starget_to_rport(starget);
350
351 /*
352 * if parent is remote port, use values from remote port.
353 * Otherwise, this host uses the fc_transport, but not the
354 * remote port interface. As such, initialize to known non-values.
355 */
356 if (rport) {
357 fc_starget_node_name(starget) = rport->node_name;
358 fc_starget_port_name(starget) = rport->port_name;
359 fc_starget_port_id(starget) = rport->port_id;
360 } else {
361 fc_starget_node_name(starget) = -1;
362 fc_starget_port_name(starget) = -1;
363 fc_starget_port_id(starget) = -1;
364 }
365
366 return 0;
367 }
368
369 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
370 "fc_transport",
371 fc_target_setup,
372 NULL,
373 NULL);
374
375 static int fc_host_setup(struct transport_container *tc, struct device *dev,
376 struct device *cdev)
377 {
378 struct Scsi_Host *shost = dev_to_shost(dev);
379 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
380
381 /*
382 * Set default values easily detected by the midlayer as
383 * failure cases. The scsi lldd is responsible for initializing
384 * all transport attributes to valid values per host.
385 */
386 fc_host->node_name = -1;
387 fc_host->port_name = -1;
388 fc_host->permanent_port_name = -1;
389 fc_host->supported_classes = FC_COS_UNSPECIFIED;
390 memset(fc_host->supported_fc4s, 0,
391 sizeof(fc_host->supported_fc4s));
392 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
393 fc_host->maxframe_size = -1;
394 fc_host->max_npiv_vports = 0;
395 memset(fc_host->serial_number, 0,
396 sizeof(fc_host->serial_number));
397 memset(fc_host->manufacturer, 0,
398 sizeof(fc_host->manufacturer));
399 memset(fc_host->model, 0,
400 sizeof(fc_host->model));
401 memset(fc_host->model_description, 0,
402 sizeof(fc_host->model_description));
403 memset(fc_host->hardware_version, 0,
404 sizeof(fc_host->hardware_version));
405 memset(fc_host->driver_version, 0,
406 sizeof(fc_host->driver_version));
407 memset(fc_host->firmware_version, 0,
408 sizeof(fc_host->firmware_version));
409 memset(fc_host->optionrom_version, 0,
410 sizeof(fc_host->optionrom_version));
411
412 fc_host->port_id = -1;
413 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
414 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
415 memset(fc_host->active_fc4s, 0,
416 sizeof(fc_host->active_fc4s));
417 fc_host->speed = FC_PORTSPEED_UNKNOWN;
418 fc_host->fabric_name = -1;
419 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
420 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
421
422 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
423
424 INIT_LIST_HEAD(&fc_host->rports);
425 INIT_LIST_HEAD(&fc_host->rport_bindings);
426 INIT_LIST_HEAD(&fc_host->vports);
427 fc_host->next_rport_number = 0;
428 fc_host->next_target_id = 0;
429 fc_host->next_vport_number = 0;
430 fc_host->npiv_vports_inuse = 0;
431
432 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
433 "fc_wq_%d", shost->host_no);
434 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
435 if (!fc_host->work_q)
436 return -ENOMEM;
437
438 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
439 snprintf(fc_host->devloss_work_q_name,
440 sizeof(fc_host->devloss_work_q_name),
441 "fc_dl_%d", shost->host_no);
442 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
443 fc_host->devloss_work_q_name);
444 if (!fc_host->devloss_work_q) {
445 destroy_workqueue(fc_host->work_q);
446 fc_host->work_q = NULL;
447 return -ENOMEM;
448 }
449
450 fc_bsg_hostadd(shost, fc_host);
451 /* ignore any bsg add error - we just can't do sgio */
452
453 return 0;
454 }
455
456 static int fc_host_remove(struct transport_container *tc, struct device *dev,
457 struct device *cdev)
458 {
459 struct Scsi_Host *shost = dev_to_shost(dev);
460 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
461
462 fc_bsg_remove(fc_host->rqst_q);
463 return 0;
464 }
465
466 static DECLARE_TRANSPORT_CLASS(fc_host_class,
467 "fc_host",
468 fc_host_setup,
469 fc_host_remove,
470 NULL);
471
472 /*
473 * Setup and Remove actions for remote ports are handled
474 * in the service functions below.
475 */
476 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
477 "fc_remote_ports",
478 NULL,
479 NULL,
480 NULL);
481
482 /*
483 * Setup and Remove actions for virtual ports are handled
484 * in the service functions below.
485 */
486 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
487 "fc_vports",
488 NULL,
489 NULL,
490 NULL);
491
492 /*
493 * Netlink Infrastructure
494 */
495
496 static atomic_t fc_event_seq;
497
498 /**
499 * fc_get_event_number - Obtain the next sequential FC event number
500 *
501 * Notes:
502 * We could have inlined this, but it would have required fc_event_seq to
503 * be exposed. For now, live with the subroutine call.
504 * Atomic used to avoid lock/unlock...
505 */
506 u32
507 fc_get_event_number(void)
508 {
509 return atomic_add_return(1, &fc_event_seq);
510 }
511 EXPORT_SYMBOL(fc_get_event_number);
512
513 /**
514 * fc_host_post_fc_event - routine to do the work of posting an event
515 * on an fc_host.
516 * @shost: host the event occurred on
517 * @event_number: fc event number obtained from get_fc_event_number()
518 * @event_code: fc_host event being posted
519 * @data_len: amount, in bytes, of event data
520 * @data_buf: pointer to event data
521 * @vendor_id: value for Vendor id
522 *
523 * Notes:
524 * This routine assumes no locks are held on entry.
525 */
526 void
527 fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
528 enum fc_host_event_code event_code,
529 u32 data_len, char *data_buf, u64 vendor_id)
530 {
531 struct sk_buff *skb;
532 struct nlmsghdr *nlh;
533 struct fc_nl_event *event;
534 const char *name;
535 u32 len;
536 int err;
537
538 if (!data_buf || data_len < 4)
539 data_len = 0;
540
541 if (!scsi_nl_sock) {
542 err = -ENOENT;
543 goto send_fail;
544 }
545
546 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
547
548 skb = nlmsg_new(len, GFP_KERNEL);
549 if (!skb) {
550 err = -ENOBUFS;
551 goto send_fail;
552 }
553
554 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
555 if (!nlh) {
556 err = -ENOBUFS;
557 goto send_fail_skb;
558 }
559 event = nlmsg_data(nlh);
560
561 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
562 FC_NL_ASYNC_EVENT, len);
563 event->seconds = ktime_get_real_seconds();
564 event->vendor_id = vendor_id;
565 event->host_no = shost->host_no;
566 event->event_datalen = data_len; /* bytes */
567 event->event_num = event_number;
568 event->event_code = event_code;
569 if (data_len)
570 memcpy(&event->event_data, data_buf, data_len);
571
572 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
573 GFP_KERNEL);
574 return;
575
576 send_fail_skb:
577 kfree_skb(skb);
578 send_fail:
579 name = get_fc_host_event_code_name(event_code);
580 printk(KERN_WARNING
581 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
582 __func__, shost->host_no,
583 (name) ? name : "<unknown>",
584 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err);
585 return;
586 }
587 EXPORT_SYMBOL(fc_host_post_fc_event);
588
589 /**
590 * fc_host_post_event - called to post an even on an fc_host.
591 * @shost: host the event occurred on
592 * @event_number: fc event number obtained from get_fc_event_number()
593 * @event_code: fc_host event being posted
594 * @event_data: 32bits of data for the event being posted
595 *
596 * Notes:
597 * This routine assumes no locks are held on entry.
598 */
599 void
600 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
601 enum fc_host_event_code event_code, u32 event_data)
602 {
603 fc_host_post_fc_event(shost, event_number, event_code,
604 (u32)sizeof(u32), (char *)&event_data, 0);
605 }
606 EXPORT_SYMBOL(fc_host_post_event);
607
608
609 /**
610 * fc_host_post_vendor_event - called to post a vendor unique event
611 * on an fc_host
612 * @shost: host the event occurred on
613 * @event_number: fc event number obtained from get_fc_event_number()
614 * @data_len: amount, in bytes, of vendor unique data
615 * @data_buf: pointer to vendor unique data
616 * @vendor_id: Vendor id
617 *
618 * Notes:
619 * This routine assumes no locks are held on entry.
620 */
621 void
622 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
623 u32 data_len, char * data_buf, u64 vendor_id)
624 {
625 fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE,
626 data_len, data_buf, vendor_id);
627 }
628 EXPORT_SYMBOL(fc_host_post_vendor_event);
629
630 /**
631 * fc_host_rcv_fpin - routine to process a received FPIN.
632 * @shost: host the FPIN was received on
633 * @fpin_len: length of FPIN payload, in bytes
634 * @fpin_buf: pointer to FPIN payload
635 *
636 * Notes:
637 * This routine assumes no locks are held on entry.
638 */
639 void
640 fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf)
641 {
642 fc_host_post_fc_event(shost, fc_get_event_number(),
643 FCH_EVT_LINK_FPIN, fpin_len, fpin_buf, 0);
644 }
645 EXPORT_SYMBOL(fc_host_fpin_rcv);
646
647
648 static __init int fc_transport_init(void)
649 {
650 int error;
651
652 atomic_set(&fc_event_seq, 0);
653
654 error = transport_class_register(&fc_host_class);
655 if (error)
656 return error;
657 error = transport_class_register(&fc_vport_class);
658 if (error)
659 goto unreg_host_class;
660 error = transport_class_register(&fc_rport_class);
661 if (error)
662 goto unreg_vport_class;
663 error = transport_class_register(&fc_transport_class);
664 if (error)
665 goto unreg_rport_class;
666 return 0;
667
668 unreg_rport_class:
669 transport_class_unregister(&fc_rport_class);
670 unreg_vport_class:
671 transport_class_unregister(&fc_vport_class);
672 unreg_host_class:
673 transport_class_unregister(&fc_host_class);
674 return error;
675 }
676
677 static void __exit fc_transport_exit(void)
678 {
679 transport_class_unregister(&fc_transport_class);
680 transport_class_unregister(&fc_rport_class);
681 transport_class_unregister(&fc_host_class);
682 transport_class_unregister(&fc_vport_class);
683 }
684
685 /*
686 * FC Remote Port Attribute Management
687 */
688
689 #define fc_rport_show_function(field, format_string, sz, cast) \
690 static ssize_t \
691 show_fc_rport_##field (struct device *dev, \
692 struct device_attribute *attr, char *buf) \
693 { \
694 struct fc_rport *rport = transport_class_to_rport(dev); \
695 struct Scsi_Host *shost = rport_to_shost(rport); \
696 struct fc_internal *i = to_fc_internal(shost->transportt); \
697 if ((i->f->get_rport_##field) && \
698 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
699 (rport->port_state == FC_PORTSTATE_DELETED) || \
700 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
701 i->f->get_rport_##field(rport); \
702 return snprintf(buf, sz, format_string, cast rport->field); \
703 }
704
705 #define fc_rport_store_function(field) \
706 static ssize_t \
707 store_fc_rport_##field(struct device *dev, \
708 struct device_attribute *attr, \
709 const char *buf, size_t count) \
710 { \
711 int val; \
712 struct fc_rport *rport = transport_class_to_rport(dev); \
713 struct Scsi_Host *shost = rport_to_shost(rport); \
714 struct fc_internal *i = to_fc_internal(shost->transportt); \
715 char *cp; \
716 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
717 (rport->port_state == FC_PORTSTATE_DELETED) || \
718 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
719 return -EBUSY; \
720 val = simple_strtoul(buf, &cp, 0); \
721 if (*cp && (*cp != '\n')) \
722 return -EINVAL; \
723 i->f->set_rport_##field(rport, val); \
724 return count; \
725 }
726
727 #define fc_rport_rd_attr(field, format_string, sz) \
728 fc_rport_show_function(field, format_string, sz, ) \
729 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
730 show_fc_rport_##field, NULL)
731
732 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
733 fc_rport_show_function(field, format_string, sz, (cast)) \
734 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
735 show_fc_rport_##field, NULL)
736
737 #define fc_rport_rw_attr(field, format_string, sz) \
738 fc_rport_show_function(field, format_string, sz, ) \
739 fc_rport_store_function(field) \
740 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
741 show_fc_rport_##field, \
742 store_fc_rport_##field)
743
744
745 #define fc_private_rport_show_function(field, format_string, sz, cast) \
746 static ssize_t \
747 show_fc_rport_##field (struct device *dev, \
748 struct device_attribute *attr, char *buf) \
749 { \
750 struct fc_rport *rport = transport_class_to_rport(dev); \
751 return snprintf(buf, sz, format_string, cast rport->field); \
752 }
753
754 #define fc_private_rport_rd_attr(field, format_string, sz) \
755 fc_private_rport_show_function(field, format_string, sz, ) \
756 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
757 show_fc_rport_##field, NULL)
758
759 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
760 fc_private_rport_show_function(field, format_string, sz, (cast)) \
761 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
762 show_fc_rport_##field, NULL)
763
764
765 #define fc_private_rport_rd_enum_attr(title, maxlen) \
766 static ssize_t \
767 show_fc_rport_##title (struct device *dev, \
768 struct device_attribute *attr, char *buf) \
769 { \
770 struct fc_rport *rport = transport_class_to_rport(dev); \
771 const char *name; \
772 name = get_fc_##title##_name(rport->title); \
773 if (!name) \
774 return -EINVAL; \
775 return snprintf(buf, maxlen, "%s\n", name); \
776 } \
777 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
778 show_fc_rport_##title, NULL)
779
780
781 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
782 i->private_rport_attrs[count] = device_attr_rport_##field; \
783 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
784 i->private_rport_attrs[count].store = NULL; \
785 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
786 if (i->f->show_rport_##field) \
787 count++
788
789 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
790 i->private_rport_attrs[count] = device_attr_rport_##field; \
791 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
792 i->private_rport_attrs[count].store = NULL; \
793 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
794 count++
795
796 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
797 i->private_rport_attrs[count] = device_attr_rport_##field; \
798 if (!i->f->set_rport_##field) { \
799 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
800 i->private_rport_attrs[count].store = NULL; \
801 } \
802 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
803 if (i->f->show_rport_##field) \
804 count++
805
806 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
807 { \
808 i->private_rport_attrs[count] = device_attr_rport_##field; \
809 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
810 count++; \
811 }
812
813
814 /* The FC Transport Remote Port Attributes: */
815
816 /* Fixed Remote Port Attributes */
817
818 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
819
820 static ssize_t
821 show_fc_rport_supported_classes (struct device *dev,
822 struct device_attribute *attr, char *buf)
823 {
824 struct fc_rport *rport = transport_class_to_rport(dev);
825 if (rport->supported_classes == FC_COS_UNSPECIFIED)
826 return snprintf(buf, 20, "unspecified\n");
827 return get_fc_cos_names(rport->supported_classes, buf);
828 }
829 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
830 show_fc_rport_supported_classes, NULL);
831
832 /* Dynamic Remote Port Attributes */
833
834 /*
835 * dev_loss_tmo attribute
836 */
837 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
838 {
839 char *cp;
840
841 *val = simple_strtoul(buf, &cp, 0);
842 if (*cp && (*cp != '\n'))
843 return -EINVAL;
844 /*
845 * Check for overflow; dev_loss_tmo is u32
846 */
847 if (*val > UINT_MAX)
848 return -EINVAL;
849
850 return 0;
851 }
852
853 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
854 unsigned long val)
855 {
856 struct Scsi_Host *shost = rport_to_shost(rport);
857 struct fc_internal *i = to_fc_internal(shost->transportt);
858
859 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
860 (rport->port_state == FC_PORTSTATE_DELETED) ||
861 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
862 return -EBUSY;
863 /*
864 * Check for overflow; dev_loss_tmo is u32
865 */
866 if (val > UINT_MAX)
867 return -EINVAL;
868
869 /*
870 * If fast_io_fail is off we have to cap
871 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
872 */
873 if (rport->fast_io_fail_tmo == -1 &&
874 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
875 return -EINVAL;
876
877 i->f->set_rport_dev_loss_tmo(rport, val);
878 return 0;
879 }
880
881 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
882 static ssize_t
883 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
884 const char *buf, size_t count)
885 {
886 struct fc_rport *rport = transport_class_to_rport(dev);
887 unsigned long val;
888 int rc;
889
890 rc = fc_str_to_dev_loss(buf, &val);
891 if (rc)
892 return rc;
893
894 rc = fc_rport_set_dev_loss_tmo(rport, val);
895 if (rc)
896 return rc;
897 return count;
898 }
899 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
900 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
901
902
903 /* Private Remote Port Attributes */
904
905 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
906 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
907 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
908
909 static ssize_t
910 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
911 char *buf)
912 {
913 struct fc_rport *rport = transport_class_to_rport(dev);
914
915 /* identify any roles that are port_id specific */
916 if ((rport->port_id != -1) &&
917 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
918 FC_WELLKNOWN_PORTID_MASK) {
919 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
920 case FC_FPORT_PORTID:
921 return snprintf(buf, 30, "Fabric Port\n");
922 case FC_FABCTLR_PORTID:
923 return snprintf(buf, 30, "Fabric Controller\n");
924 case FC_DIRSRVR_PORTID:
925 return snprintf(buf, 30, "Directory Server\n");
926 case FC_TIMESRVR_PORTID:
927 return snprintf(buf, 30, "Time Server\n");
928 case FC_MGMTSRVR_PORTID:
929 return snprintf(buf, 30, "Management Server\n");
930 default:
931 return snprintf(buf, 30, "Unknown Fabric Entity\n");
932 }
933 } else {
934 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
935 return snprintf(buf, 20, "unknown\n");
936 return get_fc_port_roles_names(rport->roles, buf);
937 }
938 }
939 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
940 show_fc_rport_roles, NULL);
941
942 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
943 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
944
945 /*
946 * fast_io_fail_tmo attribute
947 */
948 static ssize_t
949 show_fc_rport_fast_io_fail_tmo (struct device *dev,
950 struct device_attribute *attr, char *buf)
951 {
952 struct fc_rport *rport = transport_class_to_rport(dev);
953
954 if (rport->fast_io_fail_tmo == -1)
955 return snprintf(buf, 5, "off\n");
956 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
957 }
958
959 static ssize_t
960 store_fc_rport_fast_io_fail_tmo(struct device *dev,
961 struct device_attribute *attr, const char *buf,
962 size_t count)
963 {
964 int val;
965 char *cp;
966 struct fc_rport *rport = transport_class_to_rport(dev);
967
968 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
969 (rport->port_state == FC_PORTSTATE_DELETED) ||
970 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
971 return -EBUSY;
972 if (strncmp(buf, "off", 3) == 0)
973 rport->fast_io_fail_tmo = -1;
974 else {
975 val = simple_strtoul(buf, &cp, 0);
976 if ((*cp && (*cp != '\n')) || (val < 0))
977 return -EINVAL;
978 /*
979 * Cap fast_io_fail by dev_loss_tmo or
980 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
981 */
982 if ((val >= rport->dev_loss_tmo) ||
983 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
984 return -EINVAL;
985
986 rport->fast_io_fail_tmo = val;
987 }
988 return count;
989 }
990 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
991 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
992
993
994 /*
995 * FC SCSI Target Attribute Management
996 */
997
998 /*
999 * Note: in the target show function we recognize when the remote
1000 * port is in the hierarchy and do not allow the driver to get
1001 * involved in sysfs functions. The driver only gets involved if
1002 * it's the "old" style that doesn't use rports.
1003 */
1004 #define fc_starget_show_function(field, format_string, sz, cast) \
1005 static ssize_t \
1006 show_fc_starget_##field (struct device *dev, \
1007 struct device_attribute *attr, char *buf) \
1008 { \
1009 struct scsi_target *starget = transport_class_to_starget(dev); \
1010 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1011 struct fc_internal *i = to_fc_internal(shost->transportt); \
1012 struct fc_rport *rport = starget_to_rport(starget); \
1013 if (rport) \
1014 fc_starget_##field(starget) = rport->field; \
1015 else if (i->f->get_starget_##field) \
1016 i->f->get_starget_##field(starget); \
1017 return snprintf(buf, sz, format_string, \
1018 cast fc_starget_##field(starget)); \
1019 }
1020
1021 #define fc_starget_rd_attr(field, format_string, sz) \
1022 fc_starget_show_function(field, format_string, sz, ) \
1023 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1024 show_fc_starget_##field, NULL)
1025
1026 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1027 fc_starget_show_function(field, format_string, sz, (cast)) \
1028 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1029 show_fc_starget_##field, NULL)
1030
1031 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
1032 i->private_starget_attrs[count] = device_attr_starget_##field; \
1033 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1034 i->private_starget_attrs[count].store = NULL; \
1035 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1036 if (i->f->show_starget_##field) \
1037 count++
1038
1039 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
1040 i->private_starget_attrs[count] = device_attr_starget_##field; \
1041 if (!i->f->set_starget_##field) { \
1042 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1043 i->private_starget_attrs[count].store = NULL; \
1044 } \
1045 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1046 if (i->f->show_starget_##field) \
1047 count++
1048
1049 /* The FC Transport SCSI Target Attributes: */
1050 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1051 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1052 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1053
1054
1055 /*
1056 * FC Virtual Port Attribute Management
1057 */
1058
1059 #define fc_vport_show_function(field, format_string, sz, cast) \
1060 static ssize_t \
1061 show_fc_vport_##field (struct device *dev, \
1062 struct device_attribute *attr, char *buf) \
1063 { \
1064 struct fc_vport *vport = transport_class_to_vport(dev); \
1065 struct Scsi_Host *shost = vport_to_shost(vport); \
1066 struct fc_internal *i = to_fc_internal(shost->transportt); \
1067 if ((i->f->get_vport_##field) && \
1068 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1069 i->f->get_vport_##field(vport); \
1070 return snprintf(buf, sz, format_string, cast vport->field); \
1071 }
1072
1073 #define fc_vport_store_function(field) \
1074 static ssize_t \
1075 store_fc_vport_##field(struct device *dev, \
1076 struct device_attribute *attr, \
1077 const char *buf, size_t count) \
1078 { \
1079 int val; \
1080 struct fc_vport *vport = transport_class_to_vport(dev); \
1081 struct Scsi_Host *shost = vport_to_shost(vport); \
1082 struct fc_internal *i = to_fc_internal(shost->transportt); \
1083 char *cp; \
1084 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1085 return -EBUSY; \
1086 val = simple_strtoul(buf, &cp, 0); \
1087 if (*cp && (*cp != '\n')) \
1088 return -EINVAL; \
1089 i->f->set_vport_##field(vport, val); \
1090 return count; \
1091 }
1092
1093 #define fc_vport_store_str_function(field, slen) \
1094 static ssize_t \
1095 store_fc_vport_##field(struct device *dev, \
1096 struct device_attribute *attr, \
1097 const char *buf, size_t count) \
1098 { \
1099 struct fc_vport *vport = transport_class_to_vport(dev); \
1100 struct Scsi_Host *shost = vport_to_shost(vport); \
1101 struct fc_internal *i = to_fc_internal(shost->transportt); \
1102 unsigned int cnt=count; \
1103 \
1104 /* count may include a LF at end of string */ \
1105 if (buf[cnt-1] == '\n') \
1106 cnt--; \
1107 if (cnt > ((slen) - 1)) \
1108 return -EINVAL; \
1109 memcpy(vport->field, buf, cnt); \
1110 i->f->set_vport_##field(vport); \
1111 return count; \
1112 }
1113
1114 #define fc_vport_rd_attr(field, format_string, sz) \
1115 fc_vport_show_function(field, format_string, sz, ) \
1116 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1117 show_fc_vport_##field, NULL)
1118
1119 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1120 fc_vport_show_function(field, format_string, sz, (cast)) \
1121 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1122 show_fc_vport_##field, NULL)
1123
1124 #define fc_vport_rw_attr(field, format_string, sz) \
1125 fc_vport_show_function(field, format_string, sz, ) \
1126 fc_vport_store_function(field) \
1127 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1128 show_fc_vport_##field, \
1129 store_fc_vport_##field)
1130
1131 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1132 static ssize_t \
1133 show_fc_vport_##field (struct device *dev, \
1134 struct device_attribute *attr, char *buf) \
1135 { \
1136 struct fc_vport *vport = transport_class_to_vport(dev); \
1137 return snprintf(buf, sz, format_string, cast vport->field); \
1138 }
1139
1140 #define fc_private_vport_store_u32_function(field) \
1141 static ssize_t \
1142 store_fc_vport_##field(struct device *dev, \
1143 struct device_attribute *attr, \
1144 const char *buf, size_t count) \
1145 { \
1146 u32 val; \
1147 struct fc_vport *vport = transport_class_to_vport(dev); \
1148 char *cp; \
1149 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1150 return -EBUSY; \
1151 val = simple_strtoul(buf, &cp, 0); \
1152 if (*cp && (*cp != '\n')) \
1153 return -EINVAL; \
1154 vport->field = val; \
1155 return count; \
1156 }
1157
1158
1159 #define fc_private_vport_rd_attr(field, format_string, sz) \
1160 fc_private_vport_show_function(field, format_string, sz, ) \
1161 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1162 show_fc_vport_##field, NULL)
1163
1164 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1165 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1166 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1167 show_fc_vport_##field, NULL)
1168
1169 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1170 fc_private_vport_show_function(field, format_string, sz, ) \
1171 fc_private_vport_store_u32_function(field) \
1172 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1173 show_fc_vport_##field, \
1174 store_fc_vport_##field)
1175
1176
1177 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1178 static ssize_t \
1179 show_fc_vport_##title (struct device *dev, \
1180 struct device_attribute *attr, \
1181 char *buf) \
1182 { \
1183 struct fc_vport *vport = transport_class_to_vport(dev); \
1184 const char *name; \
1185 name = get_fc_##title##_name(vport->title); \
1186 if (!name) \
1187 return -EINVAL; \
1188 return snprintf(buf, maxlen, "%s\n", name); \
1189 } \
1190 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1191 show_fc_vport_##title, NULL)
1192
1193
1194 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1195 i->private_vport_attrs[count] = device_attr_vport_##field; \
1196 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1197 i->private_vport_attrs[count].store = NULL; \
1198 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1199 if (i->f->get_##field) \
1200 count++
1201 /* NOTE: Above MACRO differs: checks function not show bit */
1202
1203 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1204 i->private_vport_attrs[count] = device_attr_vport_##field; \
1205 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1206 i->private_vport_attrs[count].store = NULL; \
1207 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1208 count++
1209
1210 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1211 i->private_vport_attrs[count] = device_attr_vport_##field; \
1212 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1213 if (i->f->field) \
1214 count++
1215 /* NOTE: Above MACRO differs: checks function */
1216
1217 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1218 i->private_vport_attrs[count] = device_attr_vport_##field; \
1219 if (!i->f->set_vport_##field) { \
1220 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1221 i->private_vport_attrs[count].store = NULL; \
1222 } \
1223 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1224 count++
1225 /* NOTE: Above MACRO differs: does not check show bit */
1226
1227 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1228 { \
1229 i->private_vport_attrs[count] = device_attr_vport_##field; \
1230 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1231 count++; \
1232 }
1233
1234
1235 /* The FC Transport Virtual Port Attributes: */
1236
1237 /* Fixed Virtual Port Attributes */
1238
1239 /* Dynamic Virtual Port Attributes */
1240
1241 /* Private Virtual Port Attributes */
1242
1243 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1244 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1245 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1246 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1247
1248 static ssize_t
1249 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1250 char *buf)
1251 {
1252 struct fc_vport *vport = transport_class_to_vport(dev);
1253
1254 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1255 return snprintf(buf, 20, "unknown\n");
1256 return get_fc_port_roles_names(vport->roles, buf);
1257 }
1258 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1259
1260 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1261
1262 fc_private_vport_show_function(symbolic_name, "%s\n",
1263 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1264 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1265 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1266 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1267
1268 static ssize_t
1269 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1270 const char *buf, size_t count)
1271 {
1272 struct fc_vport *vport = transport_class_to_vport(dev);
1273 struct Scsi_Host *shost = vport_to_shost(vport);
1274 unsigned long flags;
1275
1276 spin_lock_irqsave(shost->host_lock, flags);
1277 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) {
1278 spin_unlock_irqrestore(shost->host_lock, flags);
1279 return -EBUSY;
1280 }
1281 vport->flags |= FC_VPORT_DELETING;
1282 spin_unlock_irqrestore(shost->host_lock, flags);
1283
1284 fc_queue_work(shost, &vport->vport_delete_work);
1285 return count;
1286 }
1287 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1288 NULL, store_fc_vport_delete);
1289
1290
1291 /*
1292 * Enable/Disable vport
1293 * Write "1" to disable, write "0" to enable
1294 */
1295 static ssize_t
1296 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1297 const char *buf,
1298 size_t count)
1299 {
1300 struct fc_vport *vport = transport_class_to_vport(dev);
1301 struct Scsi_Host *shost = vport_to_shost(vport);
1302 struct fc_internal *i = to_fc_internal(shost->transportt);
1303 int stat;
1304
1305 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1306 return -EBUSY;
1307
1308 if (*buf == '0') {
1309 if (vport->vport_state != FC_VPORT_DISABLED)
1310 return -EALREADY;
1311 } else if (*buf == '1') {
1312 if (vport->vport_state == FC_VPORT_DISABLED)
1313 return -EALREADY;
1314 } else
1315 return -EINVAL;
1316
1317 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1318 return stat ? stat : count;
1319 }
1320 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1321 NULL, store_fc_vport_disable);
1322
1323
1324 /*
1325 * Host Attribute Management
1326 */
1327
1328 #define fc_host_show_function(field, format_string, sz, cast) \
1329 static ssize_t \
1330 show_fc_host_##field (struct device *dev, \
1331 struct device_attribute *attr, char *buf) \
1332 { \
1333 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1334 struct fc_internal *i = to_fc_internal(shost->transportt); \
1335 if (i->f->get_host_##field) \
1336 i->f->get_host_##field(shost); \
1337 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1338 }
1339
1340 #define fc_host_store_function(field) \
1341 static ssize_t \
1342 store_fc_host_##field(struct device *dev, \
1343 struct device_attribute *attr, \
1344 const char *buf, size_t count) \
1345 { \
1346 int val; \
1347 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1348 struct fc_internal *i = to_fc_internal(shost->transportt); \
1349 char *cp; \
1350 \
1351 val = simple_strtoul(buf, &cp, 0); \
1352 if (*cp && (*cp != '\n')) \
1353 return -EINVAL; \
1354 i->f->set_host_##field(shost, val); \
1355 return count; \
1356 }
1357
1358 #define fc_host_store_str_function(field, slen) \
1359 static ssize_t \
1360 store_fc_host_##field(struct device *dev, \
1361 struct device_attribute *attr, \
1362 const char *buf, size_t count) \
1363 { \
1364 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1365 struct fc_internal *i = to_fc_internal(shost->transportt); \
1366 unsigned int cnt=count; \
1367 \
1368 /* count may include a LF at end of string */ \
1369 if (buf[cnt-1] == '\n') \
1370 cnt--; \
1371 if (cnt > ((slen) - 1)) \
1372 return -EINVAL; \
1373 memcpy(fc_host_##field(shost), buf, cnt); \
1374 i->f->set_host_##field(shost); \
1375 return count; \
1376 }
1377
1378 #define fc_host_rd_attr(field, format_string, sz) \
1379 fc_host_show_function(field, format_string, sz, ) \
1380 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1381 show_fc_host_##field, NULL)
1382
1383 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1384 fc_host_show_function(field, format_string, sz, (cast)) \
1385 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1386 show_fc_host_##field, NULL)
1387
1388 #define fc_host_rw_attr(field, format_string, sz) \
1389 fc_host_show_function(field, format_string, sz, ) \
1390 fc_host_store_function(field) \
1391 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1392 show_fc_host_##field, \
1393 store_fc_host_##field)
1394
1395 #define fc_host_rd_enum_attr(title, maxlen) \
1396 static ssize_t \
1397 show_fc_host_##title (struct device *dev, \
1398 struct device_attribute *attr, char *buf) \
1399 { \
1400 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1401 struct fc_internal *i = to_fc_internal(shost->transportt); \
1402 const char *name; \
1403 if (i->f->get_host_##title) \
1404 i->f->get_host_##title(shost); \
1405 name = get_fc_##title##_name(fc_host_##title(shost)); \
1406 if (!name) \
1407 return -EINVAL; \
1408 return snprintf(buf, maxlen, "%s\n", name); \
1409 } \
1410 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1411
1412 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1413 i->private_host_attrs[count] = device_attr_host_##field; \
1414 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1415 i->private_host_attrs[count].store = NULL; \
1416 i->host_attrs[count] = &i->private_host_attrs[count]; \
1417 if (i->f->show_host_##field) \
1418 count++
1419
1420 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1421 i->private_host_attrs[count] = device_attr_host_##field; \
1422 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1423 i->private_host_attrs[count].store = NULL; \
1424 i->host_attrs[count] = &i->private_host_attrs[count]; \
1425 count++
1426
1427 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1428 i->private_host_attrs[count] = device_attr_host_##field; \
1429 if (!i->f->set_host_##field) { \
1430 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1431 i->private_host_attrs[count].store = NULL; \
1432 } \
1433 i->host_attrs[count] = &i->private_host_attrs[count]; \
1434 if (i->f->show_host_##field) \
1435 count++
1436
1437
1438 #define fc_private_host_show_function(field, format_string, sz, cast) \
1439 static ssize_t \
1440 show_fc_host_##field (struct device *dev, \
1441 struct device_attribute *attr, char *buf) \
1442 { \
1443 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1444 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1445 }
1446
1447 #define fc_private_host_rd_attr(field, format_string, sz) \
1448 fc_private_host_show_function(field, format_string, sz, ) \
1449 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1450 show_fc_host_##field, NULL)
1451
1452 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1453 fc_private_host_show_function(field, format_string, sz, (cast)) \
1454 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1455 show_fc_host_##field, NULL)
1456
1457 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1458 i->private_host_attrs[count] = device_attr_host_##field; \
1459 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1460 i->private_host_attrs[count].store = NULL; \
1461 i->host_attrs[count] = &i->private_host_attrs[count]; \
1462 count++
1463
1464 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1465 { \
1466 i->private_host_attrs[count] = device_attr_host_##field; \
1467 i->host_attrs[count] = &i->private_host_attrs[count]; \
1468 count++; \
1469 }
1470
1471
1472 /* Fixed Host Attributes */
1473
1474 static ssize_t
1475 show_fc_host_supported_classes (struct device *dev,
1476 struct device_attribute *attr, char *buf)
1477 {
1478 struct Scsi_Host *shost = transport_class_to_shost(dev);
1479
1480 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1481 return snprintf(buf, 20, "unspecified\n");
1482
1483 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1484 }
1485 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1486 show_fc_host_supported_classes, NULL);
1487
1488 static ssize_t
1489 show_fc_host_supported_fc4s (struct device *dev,
1490 struct device_attribute *attr, char *buf)
1491 {
1492 struct Scsi_Host *shost = transport_class_to_shost(dev);
1493 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1494 }
1495 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1496 show_fc_host_supported_fc4s, NULL);
1497
1498 static ssize_t
1499 show_fc_host_supported_speeds (struct device *dev,
1500 struct device_attribute *attr, char *buf)
1501 {
1502 struct Scsi_Host *shost = transport_class_to_shost(dev);
1503
1504 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1505 return snprintf(buf, 20, "unknown\n");
1506
1507 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1508 }
1509 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1510 show_fc_host_supported_speeds, NULL);
1511
1512
1513 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1514 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1515 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1516 unsigned long long);
1517 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1518 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1519 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1520 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1521 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1522 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1523 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1524 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1525 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1526 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1527
1528
1529 /* Dynamic Host Attributes */
1530
1531 static ssize_t
1532 show_fc_host_active_fc4s (struct device *dev,
1533 struct device_attribute *attr, char *buf)
1534 {
1535 struct Scsi_Host *shost = transport_class_to_shost(dev);
1536 struct fc_internal *i = to_fc_internal(shost->transportt);
1537
1538 if (i->f->get_host_active_fc4s)
1539 i->f->get_host_active_fc4s(shost);
1540
1541 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1542 }
1543 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1544 show_fc_host_active_fc4s, NULL);
1545
1546 static ssize_t
1547 show_fc_host_speed (struct device *dev,
1548 struct device_attribute *attr, char *buf)
1549 {
1550 struct Scsi_Host *shost = transport_class_to_shost(dev);
1551 struct fc_internal *i = to_fc_internal(shost->transportt);
1552
1553 if (i->f->get_host_speed)
1554 i->f->get_host_speed(shost);
1555
1556 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1557 return snprintf(buf, 20, "unknown\n");
1558
1559 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1560 }
1561 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1562 show_fc_host_speed, NULL);
1563
1564
1565 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1566 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1567 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1568 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1569 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1570
1571 fc_private_host_show_function(system_hostname, "%s\n",
1572 FC_SYMBOLIC_NAME_SIZE + 1, )
1573 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1574 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1575 show_fc_host_system_hostname, store_fc_host_system_hostname);
1576
1577
1578 /* Private Host Attributes */
1579
1580 static ssize_t
1581 show_fc_private_host_tgtid_bind_type(struct device *dev,
1582 struct device_attribute *attr, char *buf)
1583 {
1584 struct Scsi_Host *shost = transport_class_to_shost(dev);
1585 const char *name;
1586
1587 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1588 if (!name)
1589 return -EINVAL;
1590 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1591 }
1592
1593 #define get_list_head_entry(pos, head, member) \
1594 pos = list_entry((head)->next, typeof(*pos), member)
1595
1596 static ssize_t
1597 store_fc_private_host_tgtid_bind_type(struct device *dev,
1598 struct device_attribute *attr, const char *buf, size_t count)
1599 {
1600 struct Scsi_Host *shost = transport_class_to_shost(dev);
1601 struct fc_rport *rport;
1602 enum fc_tgtid_binding_type val;
1603 unsigned long flags;
1604
1605 if (get_fc_tgtid_bind_type_match(buf, &val))
1606 return -EINVAL;
1607
1608 /* if changing bind type, purge all unused consistent bindings */
1609 if (val != fc_host_tgtid_bind_type(shost)) {
1610 spin_lock_irqsave(shost->host_lock, flags);
1611 while (!list_empty(&fc_host_rport_bindings(shost))) {
1612 get_list_head_entry(rport,
1613 &fc_host_rport_bindings(shost), peers);
1614 list_del(&rport->peers);
1615 rport->port_state = FC_PORTSTATE_DELETED;
1616 fc_queue_work(shost, &rport->rport_delete_work);
1617 }
1618 spin_unlock_irqrestore(shost->host_lock, flags);
1619 }
1620
1621 fc_host_tgtid_bind_type(shost) = val;
1622 return count;
1623 }
1624
1625 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1626 show_fc_private_host_tgtid_bind_type,
1627 store_fc_private_host_tgtid_bind_type);
1628
1629 static ssize_t
1630 store_fc_private_host_issue_lip(struct device *dev,
1631 struct device_attribute *attr, const char *buf, size_t count)
1632 {
1633 struct Scsi_Host *shost = transport_class_to_shost(dev);
1634 struct fc_internal *i = to_fc_internal(shost->transportt);
1635 int ret;
1636
1637 /* ignore any data value written to the attribute */
1638 if (i->f->issue_fc_host_lip) {
1639 ret = i->f->issue_fc_host_lip(shost);
1640 return ret ? ret: count;
1641 }
1642
1643 return -ENOENT;
1644 }
1645
1646 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1647 store_fc_private_host_issue_lip);
1648
1649 static ssize_t
1650 store_fc_private_host_dev_loss_tmo(struct device *dev,
1651 struct device_attribute *attr,
1652 const char *buf, size_t count)
1653 {
1654 struct Scsi_Host *shost = transport_class_to_shost(dev);
1655 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1656 struct fc_rport *rport;
1657 unsigned long val, flags;
1658 int rc;
1659
1660 rc = fc_str_to_dev_loss(buf, &val);
1661 if (rc)
1662 return rc;
1663
1664 fc_host_dev_loss_tmo(shost) = val;
1665 spin_lock_irqsave(shost->host_lock, flags);
1666 list_for_each_entry(rport, &fc_host->rports, peers)
1667 fc_rport_set_dev_loss_tmo(rport, val);
1668 spin_unlock_irqrestore(shost->host_lock, flags);
1669 return count;
1670 }
1671
1672 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
1673 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
1674 show_fc_host_dev_loss_tmo,
1675 store_fc_private_host_dev_loss_tmo);
1676
1677 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1678
1679 /*
1680 * Host Statistics Management
1681 */
1682
1683 /* Show a given attribute in the statistics group */
1684 static ssize_t
1685 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1686 {
1687 struct Scsi_Host *shost = transport_class_to_shost(dev);
1688 struct fc_internal *i = to_fc_internal(shost->transportt);
1689 struct fc_host_statistics *stats;
1690 ssize_t ret = -ENOENT;
1691
1692 if (offset > sizeof(struct fc_host_statistics) ||
1693 offset % sizeof(u64) != 0)
1694 WARN_ON(1);
1695
1696 if (i->f->get_fc_host_stats) {
1697 stats = (i->f->get_fc_host_stats)(shost);
1698 if (stats)
1699 ret = snprintf(buf, 20, "0x%llx\n",
1700 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1701 }
1702 return ret;
1703 }
1704
1705
1706 /* generate a read-only statistics attribute */
1707 #define fc_host_statistic(name) \
1708 static ssize_t show_fcstat_##name(struct device *cd, \
1709 struct device_attribute *attr, \
1710 char *buf) \
1711 { \
1712 return fc_stat_show(cd, buf, \
1713 offsetof(struct fc_host_statistics, name)); \
1714 } \
1715 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1716
1717 fc_host_statistic(seconds_since_last_reset);
1718 fc_host_statistic(tx_frames);
1719 fc_host_statistic(tx_words);
1720 fc_host_statistic(rx_frames);
1721 fc_host_statistic(rx_words);
1722 fc_host_statistic(lip_count);
1723 fc_host_statistic(nos_count);
1724 fc_host_statistic(error_frames);
1725 fc_host_statistic(dumped_frames);
1726 fc_host_statistic(link_failure_count);
1727 fc_host_statistic(loss_of_sync_count);
1728 fc_host_statistic(loss_of_signal_count);
1729 fc_host_statistic(prim_seq_protocol_err_count);
1730 fc_host_statistic(invalid_tx_word_count);
1731 fc_host_statistic(invalid_crc_count);
1732 fc_host_statistic(fcp_input_requests);
1733 fc_host_statistic(fcp_output_requests);
1734 fc_host_statistic(fcp_control_requests);
1735 fc_host_statistic(fcp_input_megabytes);
1736 fc_host_statistic(fcp_output_megabytes);
1737 fc_host_statistic(fcp_packet_alloc_failures);
1738 fc_host_statistic(fcp_packet_aborts);
1739 fc_host_statistic(fcp_frame_alloc_failures);
1740 fc_host_statistic(fc_no_free_exch);
1741 fc_host_statistic(fc_no_free_exch_xid);
1742 fc_host_statistic(fc_xid_not_found);
1743 fc_host_statistic(fc_xid_busy);
1744 fc_host_statistic(fc_seq_not_found);
1745 fc_host_statistic(fc_non_bls_resp);
1746
1747 static ssize_t
1748 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1749 const char *buf, size_t count)
1750 {
1751 struct Scsi_Host *shost = transport_class_to_shost(dev);
1752 struct fc_internal *i = to_fc_internal(shost->transportt);
1753
1754 /* ignore any data value written to the attribute */
1755 if (i->f->reset_fc_host_stats) {
1756 i->f->reset_fc_host_stats(shost);
1757 return count;
1758 }
1759
1760 return -ENOENT;
1761 }
1762 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1763 fc_reset_statistics);
1764
1765 static struct attribute *fc_statistics_attrs[] = {
1766 &device_attr_host_seconds_since_last_reset.attr,
1767 &device_attr_host_tx_frames.attr,
1768 &device_attr_host_tx_words.attr,
1769 &device_attr_host_rx_frames.attr,
1770 &device_attr_host_rx_words.attr,
1771 &device_attr_host_lip_count.attr,
1772 &device_attr_host_nos_count.attr,
1773 &device_attr_host_error_frames.attr,
1774 &device_attr_host_dumped_frames.attr,
1775 &device_attr_host_link_failure_count.attr,
1776 &device_attr_host_loss_of_sync_count.attr,
1777 &device_attr_host_loss_of_signal_count.attr,
1778 &device_attr_host_prim_seq_protocol_err_count.attr,
1779 &device_attr_host_invalid_tx_word_count.attr,
1780 &device_attr_host_invalid_crc_count.attr,
1781 &device_attr_host_fcp_input_requests.attr,
1782 &device_attr_host_fcp_output_requests.attr,
1783 &device_attr_host_fcp_control_requests.attr,
1784 &device_attr_host_fcp_input_megabytes.attr,
1785 &device_attr_host_fcp_output_megabytes.attr,
1786 &device_attr_host_fcp_packet_alloc_failures.attr,
1787 &device_attr_host_fcp_packet_aborts.attr,
1788 &device_attr_host_fcp_frame_alloc_failures.attr,
1789 &device_attr_host_fc_no_free_exch.attr,
1790 &device_attr_host_fc_no_free_exch_xid.attr,
1791 &device_attr_host_fc_xid_not_found.attr,
1792 &device_attr_host_fc_xid_busy.attr,
1793 &device_attr_host_fc_seq_not_found.attr,
1794 &device_attr_host_fc_non_bls_resp.attr,
1795 &device_attr_host_reset_statistics.attr,
1796 NULL
1797 };
1798
1799 static struct attribute_group fc_statistics_group = {
1800 .name = "statistics",
1801 .attrs = fc_statistics_attrs,
1802 };
1803
1804
1805 /* Host Vport Attributes */
1806
1807 static int
1808 fc_parse_wwn(const char *ns, u64 *nm)
1809 {
1810 unsigned int i, j;
1811 u8 wwn[8];
1812
1813 memset(wwn, 0, sizeof(wwn));
1814
1815 /* Validate and store the new name */
1816 for (i=0, j=0; i < 16; i++) {
1817 int value;
1818
1819 value = hex_to_bin(*ns++);
1820 if (value >= 0)
1821 j = (j << 4) | value;
1822 else
1823 return -EINVAL;
1824 if (i % 2) {
1825 wwn[i/2] = j & 0xff;
1826 j = 0;
1827 }
1828 }
1829
1830 *nm = wwn_to_u64(wwn);
1831
1832 return 0;
1833 }
1834
1835
1836 /*
1837 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1838 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1839 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1840 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1841 */
1842 static ssize_t
1843 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1844 const char *buf, size_t count)
1845 {
1846 struct Scsi_Host *shost = transport_class_to_shost(dev);
1847 struct fc_vport_identifiers vid;
1848 struct fc_vport *vport;
1849 unsigned int cnt=count;
1850 int stat;
1851
1852 memset(&vid, 0, sizeof(vid));
1853
1854 /* count may include a LF at end of string */
1855 if (buf[cnt-1] == '\n')
1856 cnt--;
1857
1858 /* validate we have enough characters for WWPN */
1859 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1860 return -EINVAL;
1861
1862 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1863 if (stat)
1864 return stat;
1865
1866 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1867 if (stat)
1868 return stat;
1869
1870 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1871 vid.vport_type = FC_PORTTYPE_NPIV;
1872 /* vid.symbolic_name is already zero/NULL's */
1873 vid.disable = false; /* always enabled */
1874
1875 /* we only allow support on Channel 0 !!! */
1876 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1877 return stat ? stat : count;
1878 }
1879 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1880 store_fc_host_vport_create);
1881
1882
1883 /*
1884 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1885 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1886 * The WWNs are specified as hex characters, and may *not* contain
1887 * any prefixes (e.g. 0x, x, etc)
1888 */
1889 static ssize_t
1890 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1891 const char *buf, size_t count)
1892 {
1893 struct Scsi_Host *shost = transport_class_to_shost(dev);
1894 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1895 struct fc_vport *vport;
1896 u64 wwpn, wwnn;
1897 unsigned long flags;
1898 unsigned int cnt=count;
1899 int stat, match;
1900
1901 /* count may include a LF at end of string */
1902 if (buf[cnt-1] == '\n')
1903 cnt--;
1904
1905 /* validate we have enough characters for WWPN */
1906 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1907 return -EINVAL;
1908
1909 stat = fc_parse_wwn(&buf[0], &wwpn);
1910 if (stat)
1911 return stat;
1912
1913 stat = fc_parse_wwn(&buf[17], &wwnn);
1914 if (stat)
1915 return stat;
1916
1917 spin_lock_irqsave(shost->host_lock, flags);
1918 match = 0;
1919 /* we only allow support on Channel 0 !!! */
1920 list_for_each_entry(vport, &fc_host->vports, peers) {
1921 if ((vport->channel == 0) &&
1922 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1923 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1924 break;
1925 vport->flags |= FC_VPORT_DELETING;
1926 match = 1;
1927 break;
1928 }
1929 }
1930 spin_unlock_irqrestore(shost->host_lock, flags);
1931
1932 if (!match)
1933 return -ENODEV;
1934
1935 stat = fc_vport_terminate(vport);
1936 return stat ? stat : count;
1937 }
1938 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1939 store_fc_host_vport_delete);
1940
1941
1942 static int fc_host_match(struct attribute_container *cont,
1943 struct device *dev)
1944 {
1945 struct Scsi_Host *shost;
1946 struct fc_internal *i;
1947
1948 if (!scsi_is_host_device(dev))
1949 return 0;
1950
1951 shost = dev_to_shost(dev);
1952 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1953 != &fc_host_class.class)
1954 return 0;
1955
1956 i = to_fc_internal(shost->transportt);
1957
1958 return &i->t.host_attrs.ac == cont;
1959 }
1960
1961 static int fc_target_match(struct attribute_container *cont,
1962 struct device *dev)
1963 {
1964 struct Scsi_Host *shost;
1965 struct fc_internal *i;
1966
1967 if (!scsi_is_target_device(dev))
1968 return 0;
1969
1970 shost = dev_to_shost(dev->parent);
1971 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1972 != &fc_host_class.class)
1973 return 0;
1974
1975 i = to_fc_internal(shost->transportt);
1976
1977 return &i->t.target_attrs.ac == cont;
1978 }
1979
1980 static void fc_rport_dev_release(struct device *dev)
1981 {
1982 struct fc_rport *rport = dev_to_rport(dev);
1983 put_device(dev->parent);
1984 kfree(rport);
1985 }
1986
1987 int scsi_is_fc_rport(const struct device *dev)
1988 {
1989 return dev->release == fc_rport_dev_release;
1990 }
1991 EXPORT_SYMBOL(scsi_is_fc_rport);
1992
1993 static int fc_rport_match(struct attribute_container *cont,
1994 struct device *dev)
1995 {
1996 struct Scsi_Host *shost;
1997 struct fc_internal *i;
1998
1999 if (!scsi_is_fc_rport(dev))
2000 return 0;
2001
2002 shost = dev_to_shost(dev->parent);
2003 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2004 != &fc_host_class.class)
2005 return 0;
2006
2007 i = to_fc_internal(shost->transportt);
2008
2009 return &i->rport_attr_cont.ac == cont;
2010 }
2011
2012
2013 static void fc_vport_dev_release(struct device *dev)
2014 {
2015 struct fc_vport *vport = dev_to_vport(dev);
2016 put_device(dev->parent); /* release kobj parent */
2017 kfree(vport);
2018 }
2019
2020 static int scsi_is_fc_vport(const struct device *dev)
2021 {
2022 return dev->release == fc_vport_dev_release;
2023 }
2024
2025 static int fc_vport_match(struct attribute_container *cont,
2026 struct device *dev)
2027 {
2028 struct fc_vport *vport;
2029 struct Scsi_Host *shost;
2030 struct fc_internal *i;
2031
2032 if (!scsi_is_fc_vport(dev))
2033 return 0;
2034 vport = dev_to_vport(dev);
2035
2036 shost = vport_to_shost(vport);
2037 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2038 != &fc_host_class.class)
2039 return 0;
2040
2041 i = to_fc_internal(shost->transportt);
2042 return &i->vport_attr_cont.ac == cont;
2043 }
2044
2045
2046 /**
2047 * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2048 * @scmd: The SCSI command which timed out
2049 *
2050 * This routine protects against error handlers getting invoked while a
2051 * rport is in a blocked state, typically due to a temporarily loss of
2052 * connectivity. If the error handlers are allowed to proceed, requests
2053 * to abort i/o, reset the target, etc will likely fail as there is no way
2054 * to communicate with the device to perform the requested function. These
2055 * failures may result in the midlayer taking the device offline, requiring
2056 * manual intervention to restore operation.
2057 *
2058 * This routine, called whenever an i/o times out, validates the state of
2059 * the underlying rport. If the rport is blocked, it returns
2060 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2061 * Eventually, either the device will return, or devloss_tmo will fire,
2062 * and when the timeout then fires, it will be handled normally.
2063 * If the rport is not blocked, normal error handling continues.
2064 *
2065 * Notes:
2066 * This routine assumes no locks are held on entry.
2067 */
2068 enum blk_eh_timer_return
2069 fc_eh_timed_out(struct scsi_cmnd *scmd)
2070 {
2071 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2072
2073 if (rport->port_state == FC_PORTSTATE_BLOCKED)
2074 return BLK_EH_RESET_TIMER;
2075
2076 return BLK_EH_DONE;
2077 }
2078 EXPORT_SYMBOL(fc_eh_timed_out);
2079
2080 /*
2081 * Called by fc_user_scan to locate an rport on the shost that
2082 * matches the channel and target id, and invoke scsi_scan_target()
2083 * on the rport.
2084 */
2085 static void
2086 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2087 {
2088 struct fc_rport *rport;
2089 unsigned long flags;
2090
2091 spin_lock_irqsave(shost->host_lock, flags);
2092
2093 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2094 if (rport->scsi_target_id == -1)
2095 continue;
2096
2097 if (rport->port_state != FC_PORTSTATE_ONLINE)
2098 continue;
2099
2100 if ((channel == rport->channel) &&
2101 (id == rport->scsi_target_id)) {
2102 spin_unlock_irqrestore(shost->host_lock, flags);
2103 scsi_scan_target(&rport->dev, channel, id, lun,
2104 SCSI_SCAN_MANUAL);
2105 return;
2106 }
2107 }
2108
2109 spin_unlock_irqrestore(shost->host_lock, flags);
2110 }
2111
2112 /*
2113 * Called via sysfs scan routines. Necessary, as the FC transport
2114 * wants to place all target objects below the rport object. So this
2115 * routine must invoke the scsi_scan_target() routine with the rport
2116 * object as the parent.
2117 */
2118 static int
2119 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2120 {
2121 uint chlo, chhi;
2122 uint tgtlo, tgthi;
2123
2124 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2125 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2126 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2127 return -EINVAL;
2128
2129 if (channel == SCAN_WILD_CARD) {
2130 chlo = 0;
2131 chhi = shost->max_channel + 1;
2132 } else {
2133 chlo = channel;
2134 chhi = channel + 1;
2135 }
2136
2137 if (id == SCAN_WILD_CARD) {
2138 tgtlo = 0;
2139 tgthi = shost->max_id;
2140 } else {
2141 tgtlo = id;
2142 tgthi = id + 1;
2143 }
2144
2145 for ( ; chlo < chhi; chlo++)
2146 for ( ; tgtlo < tgthi; tgtlo++)
2147 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2148
2149 return 0;
2150 }
2151
2152 struct scsi_transport_template *
2153 fc_attach_transport(struct fc_function_template *ft)
2154 {
2155 int count;
2156 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2157 GFP_KERNEL);
2158
2159 if (unlikely(!i))
2160 return NULL;
2161
2162 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2163 i->t.target_attrs.ac.class = &fc_transport_class.class;
2164 i->t.target_attrs.ac.match = fc_target_match;
2165 i->t.target_size = sizeof(struct fc_starget_attrs);
2166 transport_container_register(&i->t.target_attrs);
2167
2168 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2169 i->t.host_attrs.ac.class = &fc_host_class.class;
2170 i->t.host_attrs.ac.match = fc_host_match;
2171 i->t.host_size = sizeof(struct fc_host_attrs);
2172 if (ft->get_fc_host_stats)
2173 i->t.host_attrs.statistics = &fc_statistics_group;
2174 transport_container_register(&i->t.host_attrs);
2175
2176 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2177 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2178 i->rport_attr_cont.ac.match = fc_rport_match;
2179 transport_container_register(&i->rport_attr_cont);
2180
2181 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2182 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2183 i->vport_attr_cont.ac.match = fc_vport_match;
2184 transport_container_register(&i->vport_attr_cont);
2185
2186 i->f = ft;
2187
2188 /* Transport uses the shost workq for scsi scanning */
2189 i->t.create_work_queue = 1;
2190
2191 i->t.user_scan = fc_user_scan;
2192
2193 /*
2194 * Setup SCSI Target Attributes.
2195 */
2196 count = 0;
2197 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2198 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2199 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2200
2201 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2202
2203 i->starget_attrs[count] = NULL;
2204
2205
2206 /*
2207 * Setup SCSI Host Attributes.
2208 */
2209 count=0;
2210 SETUP_HOST_ATTRIBUTE_RD(node_name);
2211 SETUP_HOST_ATTRIBUTE_RD(port_name);
2212 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2213 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2214 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2215 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2216 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2217 if (ft->vport_create) {
2218 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2219 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2220 }
2221 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2222 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2223 SETUP_HOST_ATTRIBUTE_RD(model);
2224 SETUP_HOST_ATTRIBUTE_RD(model_description);
2225 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2226 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2227 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2228 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2229
2230 SETUP_HOST_ATTRIBUTE_RD(port_id);
2231 SETUP_HOST_ATTRIBUTE_RD(port_type);
2232 SETUP_HOST_ATTRIBUTE_RD(port_state);
2233 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2234 SETUP_HOST_ATTRIBUTE_RD(speed);
2235 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2236 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2237 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2238
2239 /* Transport-managed attributes */
2240 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2241 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2242 if (ft->issue_fc_host_lip)
2243 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2244 if (ft->vport_create)
2245 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2246 if (ft->vport_delete)
2247 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2248
2249 BUG_ON(count > FC_HOST_NUM_ATTRS);
2250
2251 i->host_attrs[count] = NULL;
2252
2253 /*
2254 * Setup Remote Port Attributes.
2255 */
2256 count=0;
2257 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2258 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2259 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2260 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2261 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2262 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2263 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2264 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2265 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2266 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2267
2268 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2269
2270 i->rport_attrs[count] = NULL;
2271
2272 /*
2273 * Setup Virtual Port Attributes.
2274 */
2275 count=0;
2276 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2277 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2278 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2279 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2280 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2281 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2282 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2283 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2284 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2285
2286 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2287
2288 i->vport_attrs[count] = NULL;
2289
2290 return &i->t;
2291 }
2292 EXPORT_SYMBOL(fc_attach_transport);
2293
2294 void fc_release_transport(struct scsi_transport_template *t)
2295 {
2296 struct fc_internal *i = to_fc_internal(t);
2297
2298 transport_container_unregister(&i->t.target_attrs);
2299 transport_container_unregister(&i->t.host_attrs);
2300 transport_container_unregister(&i->rport_attr_cont);
2301 transport_container_unregister(&i->vport_attr_cont);
2302
2303 kfree(i);
2304 }
2305 EXPORT_SYMBOL(fc_release_transport);
2306
2307 /**
2308 * fc_queue_work - Queue work to the fc_host workqueue.
2309 * @shost: Pointer to Scsi_Host bound to fc_host.
2310 * @work: Work to queue for execution.
2311 *
2312 * Return value:
2313 * 1 - work queued for execution
2314 * 0 - work is already queued
2315 * -EINVAL - work queue doesn't exist
2316 */
2317 static int
2318 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2319 {
2320 if (unlikely(!fc_host_work_q(shost))) {
2321 printk(KERN_ERR
2322 "ERROR: FC host '%s' attempted to queue work, "
2323 "when no workqueue created.\n", shost->hostt->name);
2324 dump_stack();
2325
2326 return -EINVAL;
2327 }
2328
2329 return queue_work(fc_host_work_q(shost), work);
2330 }
2331
2332 /**
2333 * fc_flush_work - Flush a fc_host's workqueue.
2334 * @shost: Pointer to Scsi_Host bound to fc_host.
2335 */
2336 static void
2337 fc_flush_work(struct Scsi_Host *shost)
2338 {
2339 if (!fc_host_work_q(shost)) {
2340 printk(KERN_ERR
2341 "ERROR: FC host '%s' attempted to flush work, "
2342 "when no workqueue created.\n", shost->hostt->name);
2343 dump_stack();
2344 return;
2345 }
2346
2347 flush_workqueue(fc_host_work_q(shost));
2348 }
2349
2350 /**
2351 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2352 * @shost: Pointer to Scsi_Host bound to fc_host.
2353 * @work: Work to queue for execution.
2354 * @delay: jiffies to delay the work queuing
2355 *
2356 * Return value:
2357 * 1 on success / 0 already queued / < 0 for error
2358 */
2359 static int
2360 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2361 unsigned long delay)
2362 {
2363 if (unlikely(!fc_host_devloss_work_q(shost))) {
2364 printk(KERN_ERR
2365 "ERROR: FC host '%s' attempted to queue work, "
2366 "when no workqueue created.\n", shost->hostt->name);
2367 dump_stack();
2368
2369 return -EINVAL;
2370 }
2371
2372 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2373 }
2374
2375 /**
2376 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2377 * @shost: Pointer to Scsi_Host bound to fc_host.
2378 */
2379 static void
2380 fc_flush_devloss(struct Scsi_Host *shost)
2381 {
2382 if (!fc_host_devloss_work_q(shost)) {
2383 printk(KERN_ERR
2384 "ERROR: FC host '%s' attempted to flush work, "
2385 "when no workqueue created.\n", shost->hostt->name);
2386 dump_stack();
2387 return;
2388 }
2389
2390 flush_workqueue(fc_host_devloss_work_q(shost));
2391 }
2392
2393
2394 /**
2395 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2396 * @shost: Which &Scsi_Host
2397 *
2398 * This routine is expected to be called immediately preceding the
2399 * a driver's call to scsi_remove_host().
2400 *
2401 * WARNING: A driver utilizing the fc_transport, which fails to call
2402 * this routine prior to scsi_remove_host(), will leave dangling
2403 * objects in /sys/class/fc_remote_ports. Access to any of these
2404 * objects can result in a system crash !!!
2405 *
2406 * Notes:
2407 * This routine assumes no locks are held on entry.
2408 */
2409 void
2410 fc_remove_host(struct Scsi_Host *shost)
2411 {
2412 struct fc_vport *vport = NULL, *next_vport = NULL;
2413 struct fc_rport *rport = NULL, *next_rport = NULL;
2414 struct workqueue_struct *work_q;
2415 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2416 unsigned long flags;
2417
2418 spin_lock_irqsave(shost->host_lock, flags);
2419
2420 /* Remove any vports */
2421 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2422 vport->flags |= FC_VPORT_DELETING;
2423 fc_queue_work(shost, &vport->vport_delete_work);
2424 }
2425
2426 /* Remove any remote ports */
2427 list_for_each_entry_safe(rport, next_rport,
2428 &fc_host->rports, peers) {
2429 list_del(&rport->peers);
2430 rport->port_state = FC_PORTSTATE_DELETED;
2431 fc_queue_work(shost, &rport->rport_delete_work);
2432 }
2433
2434 list_for_each_entry_safe(rport, next_rport,
2435 &fc_host->rport_bindings, peers) {
2436 list_del(&rport->peers);
2437 rport->port_state = FC_PORTSTATE_DELETED;
2438 fc_queue_work(shost, &rport->rport_delete_work);
2439 }
2440
2441 spin_unlock_irqrestore(shost->host_lock, flags);
2442
2443 /* flush all scan work items */
2444 scsi_flush_work(shost);
2445
2446 /* flush all stgt delete, and rport delete work items, then kill it */
2447 if (fc_host->work_q) {
2448 work_q = fc_host->work_q;
2449 fc_host->work_q = NULL;
2450 destroy_workqueue(work_q);
2451 }
2452
2453 /* flush all devloss work items, then kill it */
2454 if (fc_host->devloss_work_q) {
2455 work_q = fc_host->devloss_work_q;
2456 fc_host->devloss_work_q = NULL;
2457 destroy_workqueue(work_q);
2458 }
2459 }
2460 EXPORT_SYMBOL(fc_remove_host);
2461
2462 static void fc_terminate_rport_io(struct fc_rport *rport)
2463 {
2464 struct Scsi_Host *shost = rport_to_shost(rport);
2465 struct fc_internal *i = to_fc_internal(shost->transportt);
2466
2467 /* Involve the LLDD if possible to terminate all io on the rport. */
2468 if (i->f->terminate_rport_io)
2469 i->f->terminate_rport_io(rport);
2470
2471 /*
2472 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2473 */
2474 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2475 }
2476
2477 /**
2478 * fc_starget_delete - called to delete the scsi descendants of an rport
2479 * @work: remote port to be operated on.
2480 *
2481 * Deletes target and all sdevs.
2482 */
2483 static void
2484 fc_starget_delete(struct work_struct *work)
2485 {
2486 struct fc_rport *rport =
2487 container_of(work, struct fc_rport, stgt_delete_work);
2488
2489 fc_terminate_rport_io(rport);
2490 scsi_remove_target(&rport->dev);
2491 }
2492
2493
2494 /**
2495 * fc_rport_final_delete - finish rport termination and delete it.
2496 * @work: remote port to be deleted.
2497 */
2498 static void
2499 fc_rport_final_delete(struct work_struct *work)
2500 {
2501 struct fc_rport *rport =
2502 container_of(work, struct fc_rport, rport_delete_work);
2503 struct device *dev = &rport->dev;
2504 struct Scsi_Host *shost = rport_to_shost(rport);
2505 struct fc_internal *i = to_fc_internal(shost->transportt);
2506 unsigned long flags;
2507 int do_callback = 0;
2508
2509 fc_terminate_rport_io(rport);
2510
2511 /*
2512 * if a scan is pending, flush the SCSI Host work_q so that
2513 * that we can reclaim the rport scan work element.
2514 */
2515 if (rport->flags & FC_RPORT_SCAN_PENDING)
2516 scsi_flush_work(shost);
2517
2518 /*
2519 * Cancel any outstanding timers. These should really exist
2520 * only when rmmod'ing the LLDD and we're asking for
2521 * immediate termination of the rports
2522 */
2523 spin_lock_irqsave(shost->host_lock, flags);
2524 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2525 spin_unlock_irqrestore(shost->host_lock, flags);
2526 if (!cancel_delayed_work(&rport->fail_io_work))
2527 fc_flush_devloss(shost);
2528 if (!cancel_delayed_work(&rport->dev_loss_work))
2529 fc_flush_devloss(shost);
2530 cancel_work_sync(&rport->scan_work);
2531 spin_lock_irqsave(shost->host_lock, flags);
2532 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2533 }
2534 spin_unlock_irqrestore(shost->host_lock, flags);
2535
2536 /* Delete SCSI target and sdevs */
2537 if (rport->scsi_target_id != -1)
2538 fc_starget_delete(&rport->stgt_delete_work);
2539
2540 /*
2541 * Notify the driver that the rport is now dead. The LLDD will
2542 * also guarantee that any communication to the rport is terminated
2543 *
2544 * Avoid this call if we already called it when we preserved the
2545 * rport for the binding.
2546 */
2547 spin_lock_irqsave(shost->host_lock, flags);
2548 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2549 (i->f->dev_loss_tmo_callbk)) {
2550 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2551 do_callback = 1;
2552 }
2553 spin_unlock_irqrestore(shost->host_lock, flags);
2554
2555 if (do_callback)
2556 i->f->dev_loss_tmo_callbk(rport);
2557
2558 fc_bsg_remove(rport->rqst_q);
2559
2560 transport_remove_device(dev);
2561 device_del(dev);
2562 transport_destroy_device(dev);
2563 scsi_host_put(shost); /* for fc_host->rport list */
2564 put_device(dev); /* for self-reference */
2565 }
2566
2567
2568 /**
2569 * fc_remote_port_create - allocates and creates a remote FC port.
2570 * @shost: scsi host the remote port is connected to.
2571 * @channel: Channel on shost port connected to.
2572 * @ids: The world wide names, fc address, and FC4 port
2573 * roles for the remote port.
2574 *
2575 * Allocates and creates the remoter port structure, including the
2576 * class and sysfs creation.
2577 *
2578 * Notes:
2579 * This routine assumes no locks are held on entry.
2580 */
2581 static struct fc_rport *
2582 fc_remote_port_create(struct Scsi_Host *shost, int channel,
2583 struct fc_rport_identifiers *ids)
2584 {
2585 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2586 struct fc_internal *fci = to_fc_internal(shost->transportt);
2587 struct fc_rport *rport;
2588 struct device *dev;
2589 unsigned long flags;
2590 int error;
2591 size_t size;
2592
2593 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2594 rport = kzalloc(size, GFP_KERNEL);
2595 if (unlikely(!rport)) {
2596 printk(KERN_ERR "%s: allocation failure\n", __func__);
2597 return NULL;
2598 }
2599
2600 rport->maxframe_size = -1;
2601 rport->supported_classes = FC_COS_UNSPECIFIED;
2602 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
2603 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2604 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2605 rport->port_id = ids->port_id;
2606 rport->roles = ids->roles;
2607 rport->port_state = FC_PORTSTATE_ONLINE;
2608 if (fci->f->dd_fcrport_size)
2609 rport->dd_data = &rport[1];
2610 rport->channel = channel;
2611 rport->fast_io_fail_tmo = -1;
2612
2613 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2614 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2615 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2616 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2617 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2618
2619 spin_lock_irqsave(shost->host_lock, flags);
2620
2621 rport->number = fc_host->next_rport_number++;
2622 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
2623 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
2624 rport->scsi_target_id = fc_host->next_target_id++;
2625 else
2626 rport->scsi_target_id = -1;
2627 list_add_tail(&rport->peers, &fc_host->rports);
2628 scsi_host_get(shost); /* for fc_host->rport list */
2629
2630 spin_unlock_irqrestore(shost->host_lock, flags);
2631
2632 dev = &rport->dev;
2633 device_initialize(dev); /* takes self reference */
2634 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2635 dev->release = fc_rport_dev_release;
2636 dev_set_name(dev, "rport-%d:%d-%d",
2637 shost->host_no, channel, rport->number);
2638 transport_setup_device(dev);
2639
2640 error = device_add(dev);
2641 if (error) {
2642 printk(KERN_ERR "FC Remote Port device_add failed\n");
2643 goto delete_rport;
2644 }
2645 transport_add_device(dev);
2646 transport_configure_device(dev);
2647
2648 fc_bsg_rportadd(shost, rport);
2649 /* ignore any bsg add error - we just can't do sgio */
2650
2651 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2652 /* initiate a scan of the target */
2653 rport->flags |= FC_RPORT_SCAN_PENDING;
2654 scsi_queue_work(shost, &rport->scan_work);
2655 }
2656
2657 return rport;
2658
2659 delete_rport:
2660 transport_destroy_device(dev);
2661 spin_lock_irqsave(shost->host_lock, flags);
2662 list_del(&rport->peers);
2663 scsi_host_put(shost); /* for fc_host->rport list */
2664 spin_unlock_irqrestore(shost->host_lock, flags);
2665 put_device(dev->parent);
2666 kfree(rport);
2667 return NULL;
2668 }
2669
2670 /**
2671 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2672 * @shost: scsi host the remote port is connected to.
2673 * @channel: Channel on shost port connected to.
2674 * @ids: The world wide names, fc address, and FC4 port
2675 * roles for the remote port.
2676 *
2677 * The LLDD calls this routine to notify the transport of the existence
2678 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2679 * of the port, it's FC address (port_id), and the FC4 roles that are
2680 * active for the port.
2681 *
2682 * For ports that are FCP targets (aka scsi targets), the FC transport
2683 * maintains consistent target id bindings on behalf of the LLDD.
2684 * A consistent target id binding is an assignment of a target id to
2685 * a remote port identifier, which persists while the scsi host is
2686 * attached. The remote port can disappear, then later reappear, and
2687 * it's target id assignment remains the same. This allows for shifts
2688 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2689 * changes to the scsi subsystem which is based on scsi host number and
2690 * target id values. Bindings are only valid during the attachment of
2691 * the scsi host. If the host detaches, then later re-attaches, target
2692 * id bindings may change.
2693 *
2694 * This routine is responsible for returning a remote port structure.
2695 * The routine will search the list of remote ports it maintains
2696 * internally on behalf of consistent target id mappings. If found, the
2697 * remote port structure will be reused. Otherwise, a new remote port
2698 * structure will be allocated.
2699 *
2700 * Whenever a remote port is allocated, a new fc_remote_port class
2701 * device is created.
2702 *
2703 * Should not be called from interrupt context.
2704 *
2705 * Notes:
2706 * This routine assumes no locks are held on entry.
2707 */
2708 struct fc_rport *
2709 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2710 struct fc_rport_identifiers *ids)
2711 {
2712 struct fc_internal *fci = to_fc_internal(shost->transportt);
2713 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2714 struct fc_rport *rport;
2715 unsigned long flags;
2716 int match = 0;
2717
2718 /* ensure any stgt delete functions are done */
2719 fc_flush_work(shost);
2720
2721 /*
2722 * Search the list of "active" rports, for an rport that has been
2723 * deleted, but we've held off the real delete while the target
2724 * is in a "blocked" state.
2725 */
2726 spin_lock_irqsave(shost->host_lock, flags);
2727
2728 list_for_each_entry(rport, &fc_host->rports, peers) {
2729
2730 if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
2731 rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
2732 (rport->channel == channel)) {
2733
2734 switch (fc_host->tgtid_bind_type) {
2735 case FC_TGTID_BIND_BY_WWPN:
2736 case FC_TGTID_BIND_NONE:
2737 if (rport->port_name == ids->port_name)
2738 match = 1;
2739 break;
2740 case FC_TGTID_BIND_BY_WWNN:
2741 if (rport->node_name == ids->node_name)
2742 match = 1;
2743 break;
2744 case FC_TGTID_BIND_BY_ID:
2745 if (rport->port_id == ids->port_id)
2746 match = 1;
2747 break;
2748 }
2749
2750 if (match) {
2751
2752 memcpy(&rport->node_name, &ids->node_name,
2753 sizeof(rport->node_name));
2754 memcpy(&rport->port_name, &ids->port_name,
2755 sizeof(rport->port_name));
2756 rport->port_id = ids->port_id;
2757
2758 rport->port_state = FC_PORTSTATE_ONLINE;
2759 rport->roles = ids->roles;
2760
2761 spin_unlock_irqrestore(shost->host_lock, flags);
2762
2763 if (fci->f->dd_fcrport_size)
2764 memset(rport->dd_data, 0,
2765 fci->f->dd_fcrport_size);
2766
2767 /*
2768 * If we were not a target, cancel the
2769 * io terminate and rport timers, and
2770 * we're done.
2771 *
2772 * If we were a target, but our new role
2773 * doesn't indicate a target, leave the
2774 * timers running expecting the role to
2775 * change as the target fully logs in. If
2776 * it doesn't, the target will be torn down.
2777 *
2778 * If we were a target, and our role shows
2779 * we're still a target, cancel the timers
2780 * and kick off a scan.
2781 */
2782
2783 /* was a target, not in roles */
2784 if ((rport->scsi_target_id != -1) &&
2785 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2786 return rport;
2787
2788 /*
2789 * Stop the fail io and dev_loss timers.
2790 * If they flush, the port_state will
2791 * be checked and will NOOP the function.
2792 */
2793 if (!cancel_delayed_work(&rport->fail_io_work))
2794 fc_flush_devloss(shost);
2795 if (!cancel_delayed_work(&rport->dev_loss_work))
2796 fc_flush_devloss(shost);
2797
2798 spin_lock_irqsave(shost->host_lock, flags);
2799
2800 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2801 FC_RPORT_DEVLOSS_PENDING |
2802 FC_RPORT_DEVLOSS_CALLBK_DONE);
2803
2804 spin_unlock_irqrestore(shost->host_lock, flags);
2805
2806 /* if target, initiate a scan */
2807 if (rport->scsi_target_id != -1) {
2808 scsi_target_unblock(&rport->dev,
2809 SDEV_RUNNING);
2810 spin_lock_irqsave(shost->host_lock,
2811 flags);
2812 rport->flags |= FC_RPORT_SCAN_PENDING;
2813 scsi_queue_work(shost,
2814 &rport->scan_work);
2815 spin_unlock_irqrestore(shost->host_lock,
2816 flags);
2817 }
2818
2819 fc_bsg_goose_queue(rport);
2820
2821 return rport;
2822 }
2823 }
2824 }
2825
2826 /*
2827 * Search the bindings array
2828 * Note: if never a FCP target, you won't be on this list
2829 */
2830 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2831
2832 /* search for a matching consistent binding */
2833
2834 list_for_each_entry(rport, &fc_host->rport_bindings,
2835 peers) {
2836 if (rport->channel != channel)
2837 continue;
2838
2839 switch (fc_host->tgtid_bind_type) {
2840 case FC_TGTID_BIND_BY_WWPN:
2841 if (rport->port_name == ids->port_name)
2842 match = 1;
2843 break;
2844 case FC_TGTID_BIND_BY_WWNN:
2845 if (rport->node_name == ids->node_name)
2846 match = 1;
2847 break;
2848 case FC_TGTID_BIND_BY_ID:
2849 if (rport->port_id == ids->port_id)
2850 match = 1;
2851 break;
2852 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2853 break;
2854 }
2855
2856 if (match) {
2857 list_move_tail(&rport->peers, &fc_host->rports);
2858 break;
2859 }
2860 }
2861
2862 if (match) {
2863 memcpy(&rport->node_name, &ids->node_name,
2864 sizeof(rport->node_name));
2865 memcpy(&rport->port_name, &ids->port_name,
2866 sizeof(rport->port_name));
2867 rport->port_id = ids->port_id;
2868 rport->port_state = FC_PORTSTATE_ONLINE;
2869 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2870
2871 if (fci->f->dd_fcrport_size)
2872 memset(rport->dd_data, 0,
2873 fci->f->dd_fcrport_size);
2874 spin_unlock_irqrestore(shost->host_lock, flags);
2875
2876 fc_remote_port_rolechg(rport, ids->roles);
2877 return rport;
2878 }
2879 }
2880
2881 spin_unlock_irqrestore(shost->host_lock, flags);
2882
2883 /* No consistent binding found - create new remote port entry */
2884 rport = fc_remote_port_create(shost, channel, ids);
2885
2886 return rport;
2887 }
2888 EXPORT_SYMBOL(fc_remote_port_add);
2889
2890
2891 /**
2892 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2893 * @rport: The remote port that no longer exists
2894 *
2895 * The LLDD calls this routine to notify the transport that a remote
2896 * port is no longer part of the topology. Note: Although a port
2897 * may no longer be part of the topology, it may persist in the remote
2898 * ports displayed by the fc_host. We do this under 2 conditions:
2899 *
2900 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2901 * This allows the port to temporarily disappear, then reappear without
2902 * disrupting the SCSI device tree attached to it. During the "blocked"
2903 * period the port will still exist.
2904 *
2905 * 2) If the port was a scsi target and disappears for longer than we
2906 * expect, we'll delete the port and the tear down the SCSI device tree
2907 * attached to it. However, we want to semi-persist the target id assigned
2908 * to that port if it eventually does exist. The port structure will
2909 * remain (although with minimal information) so that the target id
2910 * bindings also remain.
2911 *
2912 * If the remote port is not an FCP Target, it will be fully torn down
2913 * and deallocated, including the fc_remote_port class device.
2914 *
2915 * If the remote port is an FCP Target, the port will be placed in a
2916 * temporary blocked state. From the LLDD's perspective, the rport no
2917 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2918 * exists, but all sdevs on it are blocked from further I/O. The following
2919 * is then expected.
2920 *
2921 * If the remote port does not return (signaled by a LLDD call to
2922 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2923 * scsi target is removed - killing all outstanding i/o and removing the
2924 * scsi devices attached to it. The port structure will be marked Not
2925 * Present and be partially cleared, leaving only enough information to
2926 * recognize the remote port relative to the scsi target id binding if
2927 * it later appears. The port will remain as long as there is a valid
2928 * binding (e.g. until the user changes the binding type or unloads the
2929 * scsi host with the binding).
2930 *
2931 * If the remote port returns within the dev_loss_tmo value (and matches
2932 * according to the target id binding type), the port structure will be
2933 * reused. If it is no longer a SCSI target, the target will be torn
2934 * down. If it continues to be a SCSI target, then the target will be
2935 * unblocked (allowing i/o to be resumed), and a scan will be activated
2936 * to ensure that all luns are detected.
2937 *
2938 * Called from normal process context only - cannot be called from interrupt.
2939 *
2940 * Notes:
2941 * This routine assumes no locks are held on entry.
2942 */
2943 void
2944 fc_remote_port_delete(struct fc_rport *rport)
2945 {
2946 struct Scsi_Host *shost = rport_to_shost(rport);
2947 unsigned long timeout = rport->dev_loss_tmo;
2948 unsigned long flags;
2949
2950 /*
2951 * No need to flush the fc_host work_q's, as all adds are synchronous.
2952 *
2953 * We do need to reclaim the rport scan work element, so eventually
2954 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2955 * there's still a scan pending.
2956 */
2957
2958 spin_lock_irqsave(shost->host_lock, flags);
2959
2960 if (rport->port_state != FC_PORTSTATE_ONLINE) {
2961 spin_unlock_irqrestore(shost->host_lock, flags);
2962 return;
2963 }
2964
2965 /*
2966 * In the past, we if this was not an FCP-Target, we would
2967 * unconditionally just jump to deleting the rport.
2968 * However, rports can be used as node containers by the LLDD,
2969 * and its not appropriate to just terminate the rport at the
2970 * first sign of a loss in connectivity. The LLDD may want to
2971 * send ELS traffic to re-validate the login. If the rport is
2972 * immediately deleted, it makes it inappropriate for a node
2973 * container.
2974 * So... we now unconditionally wait dev_loss_tmo before
2975 * destroying an rport.
2976 */
2977
2978 rport->port_state = FC_PORTSTATE_BLOCKED;
2979
2980 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2981
2982 spin_unlock_irqrestore(shost->host_lock, flags);
2983
2984 scsi_target_block(&rport->dev);
2985
2986 /* see if we need to kill io faster than waiting for device loss */
2987 if ((rport->fast_io_fail_tmo != -1) &&
2988 (rport->fast_io_fail_tmo < timeout))
2989 fc_queue_devloss_work(shost, &rport->fail_io_work,
2990 rport->fast_io_fail_tmo * HZ);
2991
2992 /* cap the length the devices can be blocked until they are deleted */
2993 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
2994 }
2995 EXPORT_SYMBOL(fc_remote_port_delete);
2996
2997 /**
2998 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
2999 * @rport: The remote port that changed.
3000 * @roles: New roles for this port.
3001 *
3002 * Description: The LLDD calls this routine to notify the transport that the
3003 * roles on a remote port may have changed. The largest effect of this is
3004 * if a port now becomes a FCP Target, it must be allocated a
3005 * scsi target id. If the port is no longer a FCP target, any
3006 * scsi target id value assigned to it will persist in case the
3007 * role changes back to include FCP Target. No changes in the scsi
3008 * midlayer will be invoked if the role changes (in the expectation
3009 * that the role will be resumed. If it doesn't normal error processing
3010 * will take place).
3011 *
3012 * Should not be called from interrupt context.
3013 *
3014 * Notes:
3015 * This routine assumes no locks are held on entry.
3016 */
3017 void
3018 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3019 {
3020 struct Scsi_Host *shost = rport_to_shost(rport);
3021 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3022 unsigned long flags;
3023 int create = 0;
3024
3025 spin_lock_irqsave(shost->host_lock, flags);
3026 if (roles & FC_PORT_ROLE_FCP_TARGET) {
3027 if (rport->scsi_target_id == -1) {
3028 rport->scsi_target_id = fc_host->next_target_id++;
3029 create = 1;
3030 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3031 create = 1;
3032 }
3033
3034 rport->roles = roles;
3035
3036 spin_unlock_irqrestore(shost->host_lock, flags);
3037
3038 if (create) {
3039 /*
3040 * There may have been a delete timer running on the
3041 * port. Ensure that it is cancelled as we now know
3042 * the port is an FCP Target.
3043 * Note: we know the rport exists and is in an online
3044 * state as the LLDD would not have had an rport
3045 * reference to pass us.
3046 *
3047 * Take no action on the del_timer failure as the state
3048 * machine state change will validate the
3049 * transaction.
3050 */
3051 if (!cancel_delayed_work(&rport->fail_io_work))
3052 fc_flush_devloss(shost);
3053 if (!cancel_delayed_work(&rport->dev_loss_work))
3054 fc_flush_devloss(shost);
3055
3056 spin_lock_irqsave(shost->host_lock, flags);
3057 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3058 FC_RPORT_DEVLOSS_PENDING |
3059 FC_RPORT_DEVLOSS_CALLBK_DONE);
3060 spin_unlock_irqrestore(shost->host_lock, flags);
3061
3062 /* ensure any stgt delete functions are done */
3063 fc_flush_work(shost);
3064
3065 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3066 /* initiate a scan of the target */
3067 spin_lock_irqsave(shost->host_lock, flags);
3068 rport->flags |= FC_RPORT_SCAN_PENDING;
3069 scsi_queue_work(shost, &rport->scan_work);
3070 spin_unlock_irqrestore(shost->host_lock, flags);
3071 }
3072 }
3073 EXPORT_SYMBOL(fc_remote_port_rolechg);
3074
3075 /**
3076 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3077 * @work: rport target that failed to reappear in the allotted time.
3078 *
3079 * Description: An attempt to delete a remote port blocks, and if it fails
3080 * to return in the allotted time this gets called.
3081 */
3082 static void
3083 fc_timeout_deleted_rport(struct work_struct *work)
3084 {
3085 struct fc_rport *rport =
3086 container_of(work, struct fc_rport, dev_loss_work.work);
3087 struct Scsi_Host *shost = rport_to_shost(rport);
3088 struct fc_internal *i = to_fc_internal(shost->transportt);
3089 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3090 unsigned long flags;
3091 int do_callback = 0;
3092
3093 spin_lock_irqsave(shost->host_lock, flags);
3094
3095 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3096
3097 /*
3098 * If the port is ONLINE, then it came back. If it was a SCSI
3099 * target, validate it still is. If not, tear down the
3100 * scsi_target on it.
3101 */
3102 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3103 (rport->scsi_target_id != -1) &&
3104 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3105 dev_printk(KERN_ERR, &rport->dev,
3106 "blocked FC remote port time out: no longer"
3107 " a FCP target, removing starget\n");
3108 spin_unlock_irqrestore(shost->host_lock, flags);
3109 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3110 fc_queue_work(shost, &rport->stgt_delete_work);
3111 return;
3112 }
3113
3114 /* NOOP state - we're flushing workq's */
3115 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3116 spin_unlock_irqrestore(shost->host_lock, flags);
3117 dev_printk(KERN_ERR, &rport->dev,
3118 "blocked FC remote port time out: leaving"
3119 " rport%s alone\n",
3120 (rport->scsi_target_id != -1) ? " and starget" : "");
3121 return;
3122 }
3123
3124 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3125 (rport->scsi_target_id == -1)) {
3126 list_del(&rport->peers);
3127 rport->port_state = FC_PORTSTATE_DELETED;
3128 dev_printk(KERN_ERR, &rport->dev,
3129 "blocked FC remote port time out: removing"
3130 " rport%s\n",
3131 (rport->scsi_target_id != -1) ? " and starget" : "");
3132 fc_queue_work(shost, &rport->rport_delete_work);
3133 spin_unlock_irqrestore(shost->host_lock, flags);
3134 return;
3135 }
3136
3137 dev_printk(KERN_ERR, &rport->dev,
3138 "blocked FC remote port time out: removing target and "
3139 "saving binding\n");
3140
3141 list_move_tail(&rport->peers, &fc_host->rport_bindings);
3142
3143 /*
3144 * Note: We do not remove or clear the hostdata area. This allows
3145 * host-specific target data to persist along with the
3146 * scsi_target_id. It's up to the host to manage it's hostdata area.
3147 */
3148
3149 /*
3150 * Reinitialize port attributes that may change if the port comes back.
3151 */
3152 rport->maxframe_size = -1;
3153 rport->supported_classes = FC_COS_UNSPECIFIED;
3154 rport->roles = FC_PORT_ROLE_UNKNOWN;
3155 rport->port_state = FC_PORTSTATE_NOTPRESENT;
3156 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3157
3158 /*
3159 * Pre-emptively kill I/O rather than waiting for the work queue
3160 * item to teardown the starget. (FCOE libFC folks prefer this
3161 * and to have the rport_port_id still set when it's done).
3162 */
3163 spin_unlock_irqrestore(shost->host_lock, flags);
3164 fc_terminate_rport_io(rport);
3165
3166 spin_lock_irqsave(shost->host_lock, flags);
3167
3168 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3169
3170 /* remove the identifiers that aren't used in the consisting binding */
3171 switch (fc_host->tgtid_bind_type) {
3172 case FC_TGTID_BIND_BY_WWPN:
3173 rport->node_name = -1;
3174 rport->port_id = -1;
3175 break;
3176 case FC_TGTID_BIND_BY_WWNN:
3177 rport->port_name = -1;
3178 rport->port_id = -1;
3179 break;
3180 case FC_TGTID_BIND_BY_ID:
3181 rport->node_name = -1;
3182 rport->port_name = -1;
3183 break;
3184 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3185 break;
3186 }
3187
3188 /*
3189 * As this only occurs if the remote port (scsi target)
3190 * went away and didn't come back - we'll remove
3191 * all attached scsi devices.
3192 */
3193 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3194 fc_queue_work(shost, &rport->stgt_delete_work);
3195
3196 do_callback = 1;
3197 }
3198
3199 spin_unlock_irqrestore(shost->host_lock, flags);
3200
3201 /*
3202 * Notify the driver that the rport is now dead. The LLDD will
3203 * also guarantee that any communication to the rport is terminated
3204 *
3205 * Note: we set the CALLBK_DONE flag above to correspond
3206 */
3207 if (do_callback && i->f->dev_loss_tmo_callbk)
3208 i->f->dev_loss_tmo_callbk(rport);
3209 }
3210
3211
3212 /**
3213 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3214 * @work: rport to terminate io on.
3215 *
3216 * Notes: Only requests the failure of the io, not that all are flushed
3217 * prior to returning.
3218 */
3219 static void
3220 fc_timeout_fail_rport_io(struct work_struct *work)
3221 {
3222 struct fc_rport *rport =
3223 container_of(work, struct fc_rport, fail_io_work.work);
3224
3225 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3226 return;
3227
3228 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3229 fc_terminate_rport_io(rport);
3230 }
3231
3232 /**
3233 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3234 * @work: remote port to be scanned.
3235 */
3236 static void
3237 fc_scsi_scan_rport(struct work_struct *work)
3238 {
3239 struct fc_rport *rport =
3240 container_of(work, struct fc_rport, scan_work);
3241 struct Scsi_Host *shost = rport_to_shost(rport);
3242 struct fc_internal *i = to_fc_internal(shost->transportt);
3243 unsigned long flags;
3244
3245 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3246 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3247 !(i->f->disable_target_scan)) {
3248 scsi_scan_target(&rport->dev, rport->channel,
3249 rport->scsi_target_id, SCAN_WILD_CARD,
3250 SCSI_SCAN_RESCAN);
3251 }
3252
3253 spin_lock_irqsave(shost->host_lock, flags);
3254 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3255 spin_unlock_irqrestore(shost->host_lock, flags);
3256 }
3257
3258 /**
3259 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
3260 * @rport: Remote port that scsi_eh is trying to recover.
3261 *
3262 * This routine can be called from a FC LLD scsi_eh callback. It
3263 * blocks the scsi_eh thread until the fc_rport leaves the
3264 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3265 * necessary to avoid the scsi_eh failing recovery actions for blocked
3266 * rports which would lead to offlined SCSI devices.
3267 *
3268 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3269 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3270 * passed back to scsi_eh.
3271 */
3272 int fc_block_rport(struct fc_rport *rport)
3273 {
3274 struct Scsi_Host *shost = rport_to_shost(rport);
3275 unsigned long flags;
3276
3277 spin_lock_irqsave(shost->host_lock, flags);
3278 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3279 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3280 spin_unlock_irqrestore(shost->host_lock, flags);
3281 msleep(1000);
3282 spin_lock_irqsave(shost->host_lock, flags);
3283 }
3284 spin_unlock_irqrestore(shost->host_lock, flags);
3285
3286 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3287 return FAST_IO_FAIL;
3288
3289 return 0;
3290 }
3291 EXPORT_SYMBOL(fc_block_rport);
3292
3293 /**
3294 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3295 * @cmnd: SCSI command that scsi_eh is trying to recover
3296 *
3297 * This routine can be called from a FC LLD scsi_eh callback. It
3298 * blocks the scsi_eh thread until the fc_rport leaves the
3299 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3300 * necessary to avoid the scsi_eh failing recovery actions for blocked
3301 * rports which would lead to offlined SCSI devices.
3302 *
3303 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3304 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3305 * passed back to scsi_eh.
3306 */
3307 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3308 {
3309 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3310
3311 if (WARN_ON_ONCE(!rport))
3312 return FAST_IO_FAIL;
3313
3314 return fc_block_rport(rport);
3315 }
3316 EXPORT_SYMBOL(fc_block_scsi_eh);
3317
3318 /**
3319 * fc_vport_setup - allocates and creates a FC virtual port.
3320 * @shost: scsi host the virtual port is connected to.
3321 * @channel: Channel on shost port connected to.
3322 * @pdev: parent device for vport
3323 * @ids: The world wide names, FC4 port roles, etc for
3324 * the virtual port.
3325 * @ret_vport: The pointer to the created vport.
3326 *
3327 * Allocates and creates the vport structure, calls the parent host
3328 * to instantiate the vport, this completes w/ class and sysfs creation.
3329 *
3330 * Notes:
3331 * This routine assumes no locks are held on entry.
3332 */
3333 static int
3334 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3335 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3336 {
3337 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3338 struct fc_internal *fci = to_fc_internal(shost->transportt);
3339 struct fc_vport *vport;
3340 struct device *dev;
3341 unsigned long flags;
3342 size_t size;
3343 int error;
3344
3345 *ret_vport = NULL;
3346
3347 if ( ! fci->f->vport_create)
3348 return -ENOENT;
3349
3350 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3351 vport = kzalloc(size, GFP_KERNEL);
3352 if (unlikely(!vport)) {
3353 printk(KERN_ERR "%s: allocation failure\n", __func__);
3354 return -ENOMEM;
3355 }
3356
3357 vport->vport_state = FC_VPORT_UNKNOWN;
3358 vport->vport_last_state = FC_VPORT_UNKNOWN;
3359 vport->node_name = ids->node_name;
3360 vport->port_name = ids->port_name;
3361 vport->roles = ids->roles;
3362 vport->vport_type = ids->vport_type;
3363 if (fci->f->dd_fcvport_size)
3364 vport->dd_data = &vport[1];
3365 vport->shost = shost;
3366 vport->channel = channel;
3367 vport->flags = FC_VPORT_CREATING;
3368 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3369
3370 spin_lock_irqsave(shost->host_lock, flags);
3371
3372 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3373 spin_unlock_irqrestore(shost->host_lock, flags);
3374 kfree(vport);
3375 return -ENOSPC;
3376 }
3377 fc_host->npiv_vports_inuse++;
3378 vport->number = fc_host->next_vport_number++;
3379 list_add_tail(&vport->peers, &fc_host->vports);
3380 scsi_host_get(shost); /* for fc_host->vport list */
3381
3382 spin_unlock_irqrestore(shost->host_lock, flags);
3383
3384 dev = &vport->dev;
3385 device_initialize(dev); /* takes self reference */
3386 dev->parent = get_device(pdev); /* takes parent reference */
3387 dev->release = fc_vport_dev_release;
3388 dev_set_name(dev, "vport-%d:%d-%d",
3389 shost->host_no, channel, vport->number);
3390 transport_setup_device(dev);
3391
3392 error = device_add(dev);
3393 if (error) {
3394 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3395 goto delete_vport;
3396 }
3397 transport_add_device(dev);
3398 transport_configure_device(dev);
3399
3400 error = fci->f->vport_create(vport, ids->disable);
3401 if (error) {
3402 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3403 goto delete_vport_all;
3404 }
3405
3406 /*
3407 * if the parent isn't the physical adapter's Scsi_Host, ensure
3408 * the Scsi_Host at least contains a symlink to the vport.
3409 */
3410 if (pdev != &shost->shost_gendev) {
3411 error = sysfs_create_link(&shost->shost_gendev.kobj,
3412 &dev->kobj, dev_name(dev));
3413 if (error)
3414 printk(KERN_ERR
3415 "%s: Cannot create vport symlinks for "
3416 "%s, err=%d\n",
3417 __func__, dev_name(dev), error);
3418 }
3419 spin_lock_irqsave(shost->host_lock, flags);
3420 vport->flags &= ~FC_VPORT_CREATING;
3421 spin_unlock_irqrestore(shost->host_lock, flags);
3422
3423 dev_printk(KERN_NOTICE, pdev,
3424 "%s created via shost%d channel %d\n", dev_name(dev),
3425 shost->host_no, channel);
3426
3427 *ret_vport = vport;
3428
3429 return 0;
3430
3431 delete_vport_all:
3432 transport_remove_device(dev);
3433 device_del(dev);
3434 delete_vport:
3435 transport_destroy_device(dev);
3436 spin_lock_irqsave(shost->host_lock, flags);
3437 list_del(&vport->peers);
3438 scsi_host_put(shost); /* for fc_host->vport list */
3439 fc_host->npiv_vports_inuse--;
3440 spin_unlock_irqrestore(shost->host_lock, flags);
3441 put_device(dev->parent);
3442 kfree(vport);
3443
3444 return error;
3445 }
3446
3447 /**
3448 * fc_vport_create - Admin App or LLDD requests creation of a vport
3449 * @shost: scsi host the virtual port is connected to.
3450 * @channel: channel on shost port connected to.
3451 * @ids: The world wide names, FC4 port roles, etc for
3452 * the virtual port.
3453 *
3454 * Notes:
3455 * This routine assumes no locks are held on entry.
3456 */
3457 struct fc_vport *
3458 fc_vport_create(struct Scsi_Host *shost, int channel,
3459 struct fc_vport_identifiers *ids)
3460 {
3461 int stat;
3462 struct fc_vport *vport;
3463
3464 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3465 ids, &vport);
3466 return stat ? NULL : vport;
3467 }
3468 EXPORT_SYMBOL(fc_vport_create);
3469
3470 /**
3471 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3472 * @vport: fc_vport to be terminated
3473 *
3474 * Calls the LLDD vport_delete() function, then deallocates and removes
3475 * the vport from the shost and object tree.
3476 *
3477 * Notes:
3478 * This routine assumes no locks are held on entry.
3479 */
3480 int
3481 fc_vport_terminate(struct fc_vport *vport)
3482 {
3483 struct Scsi_Host *shost = vport_to_shost(vport);
3484 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3485 struct fc_internal *i = to_fc_internal(shost->transportt);
3486 struct device *dev = &vport->dev;
3487 unsigned long flags;
3488 int stat;
3489
3490 if (i->f->vport_delete)
3491 stat = i->f->vport_delete(vport);
3492 else
3493 stat = -ENOENT;
3494
3495 spin_lock_irqsave(shost->host_lock, flags);
3496 vport->flags &= ~FC_VPORT_DELETING;
3497 if (!stat) {
3498 vport->flags |= FC_VPORT_DELETED;
3499 list_del(&vport->peers);
3500 fc_host->npiv_vports_inuse--;
3501 scsi_host_put(shost); /* for fc_host->vport list */
3502 }
3503 spin_unlock_irqrestore(shost->host_lock, flags);
3504
3505 if (stat)
3506 return stat;
3507
3508 if (dev->parent != &shost->shost_gendev)
3509 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3510 transport_remove_device(dev);
3511 device_del(dev);
3512 transport_destroy_device(dev);
3513
3514 /*
3515 * Removing our self-reference should mean our
3516 * release function gets called, which will drop the remaining
3517 * parent reference and free the data structure.
3518 */
3519 put_device(dev); /* for self-reference */
3520
3521 return 0; /* SUCCESS */
3522 }
3523 EXPORT_SYMBOL(fc_vport_terminate);
3524
3525 /**
3526 * fc_vport_sched_delete - workq-based delete request for a vport
3527 * @work: vport to be deleted.
3528 */
3529 static void
3530 fc_vport_sched_delete(struct work_struct *work)
3531 {
3532 struct fc_vport *vport =
3533 container_of(work, struct fc_vport, vport_delete_work);
3534 int stat;
3535
3536 stat = fc_vport_terminate(vport);
3537 if (stat)
3538 dev_printk(KERN_ERR, vport->dev.parent,
3539 "%s: %s could not be deleted created via "
3540 "shost%d channel %d - error %d\n", __func__,
3541 dev_name(&vport->dev), vport->shost->host_no,
3542 vport->channel, stat);
3543 }
3544
3545
3546 /*
3547 * BSG support
3548 */
3549
3550 /**
3551 * fc_bsg_job_timeout - handler for when a bsg request timesout
3552 * @req: request that timed out
3553 */
3554 static enum blk_eh_timer_return
3555 fc_bsg_job_timeout(struct request *req)
3556 {
3557 struct bsg_job *job = blk_mq_rq_to_pdu(req);
3558 struct Scsi_Host *shost = fc_bsg_to_shost(job);
3559 struct fc_rport *rport = fc_bsg_to_rport(job);
3560 struct fc_internal *i = to_fc_internal(shost->transportt);
3561 int err = 0, inflight = 0;
3562
3563 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
3564 return BLK_EH_RESET_TIMER;
3565
3566 inflight = bsg_job_get(job);
3567
3568 if (inflight && i->f->bsg_timeout) {
3569 /* call LLDD to abort the i/o as it has timed out */
3570 err = i->f->bsg_timeout(job);
3571 if (err == -EAGAIN) {
3572 bsg_job_put(job);
3573 return BLK_EH_RESET_TIMER;
3574 } else if (err)
3575 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3576 "abort failed with status %d\n", err);
3577 }
3578
3579 /* the blk_end_sync_io() doesn't check the error */
3580 if (inflight)
3581 blk_mq_end_request(req, BLK_STS_IOERR);
3582 return BLK_EH_DONE;
3583 }
3584
3585 /**
3586 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3587 * @shost: scsi host rport attached to
3588 * @job: bsg job to be processed
3589 */
3590 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3591 {
3592 struct fc_internal *i = to_fc_internal(shost->transportt);
3593 struct fc_bsg_request *bsg_request = job->request;
3594 struct fc_bsg_reply *bsg_reply = job->reply;
3595 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3596 int ret;
3597
3598 /* check if we really have all the request data needed */
3599 if (job->request_len < cmdlen) {
3600 ret = -ENOMSG;
3601 goto fail_host_msg;
3602 }
3603
3604 /* Validate the host command */
3605 switch (bsg_request->msgcode) {
3606 case FC_BSG_HST_ADD_RPORT:
3607 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3608 break;
3609
3610 case FC_BSG_HST_DEL_RPORT:
3611 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3612 break;
3613
3614 case FC_BSG_HST_ELS_NOLOGIN:
3615 cmdlen += sizeof(struct fc_bsg_host_els);
3616 /* there better be a xmt and rcv payloads */
3617 if ((!job->request_payload.payload_len) ||
3618 (!job->reply_payload.payload_len)) {
3619 ret = -EINVAL;
3620 goto fail_host_msg;
3621 }
3622 break;
3623
3624 case FC_BSG_HST_CT:
3625 cmdlen += sizeof(struct fc_bsg_host_ct);
3626 /* there better be xmt and rcv payloads */
3627 if ((!job->request_payload.payload_len) ||
3628 (!job->reply_payload.payload_len)) {
3629 ret = -EINVAL;
3630 goto fail_host_msg;
3631 }
3632 break;
3633
3634 case FC_BSG_HST_VENDOR:
3635 cmdlen += sizeof(struct fc_bsg_host_vendor);
3636 if ((shost->hostt->vendor_id == 0L) ||
3637 (bsg_request->rqst_data.h_vendor.vendor_id !=
3638 shost->hostt->vendor_id)) {
3639 ret = -ESRCH;
3640 goto fail_host_msg;
3641 }
3642 break;
3643
3644 default:
3645 ret = -EBADR;
3646 goto fail_host_msg;
3647 }
3648
3649 ret = i->f->bsg_request(job);
3650 if (!ret)
3651 return 0;
3652
3653 fail_host_msg:
3654 /* return the errno failure code as the only status */
3655 BUG_ON(job->reply_len < sizeof(uint32_t));
3656 bsg_reply->reply_payload_rcv_len = 0;
3657 bsg_reply->result = ret;
3658 job->reply_len = sizeof(uint32_t);
3659 bsg_job_done(job, bsg_reply->result,
3660 bsg_reply->reply_payload_rcv_len);
3661 return 0;
3662 }
3663
3664
3665 /*
3666 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3667 * @rport: rport to be restarted
3668 */
3669 static void
3670 fc_bsg_goose_queue(struct fc_rport *rport)
3671 {
3672 struct request_queue *q = rport->rqst_q;
3673
3674 if (q)
3675 blk_mq_run_hw_queues(q, true);
3676 }
3677
3678 /**
3679 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3680 * @shost: scsi host rport attached to
3681 * @job: bsg job to be processed
3682 */
3683 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
3684 {
3685 struct fc_internal *i = to_fc_internal(shost->transportt);
3686 struct fc_bsg_request *bsg_request = job->request;
3687 struct fc_bsg_reply *bsg_reply = job->reply;
3688 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3689 int ret;
3690
3691 /* check if we really have all the request data needed */
3692 if (job->request_len < cmdlen) {
3693 ret = -ENOMSG;
3694 goto fail_rport_msg;
3695 }
3696
3697 /* Validate the rport command */
3698 switch (bsg_request->msgcode) {
3699 case FC_BSG_RPT_ELS:
3700 cmdlen += sizeof(struct fc_bsg_rport_els);
3701 goto check_bidi;
3702
3703 case FC_BSG_RPT_CT:
3704 cmdlen += sizeof(struct fc_bsg_rport_ct);
3705 check_bidi:
3706 /* there better be xmt and rcv payloads */
3707 if ((!job->request_payload.payload_len) ||
3708 (!job->reply_payload.payload_len)) {
3709 ret = -EINVAL;
3710 goto fail_rport_msg;
3711 }
3712 break;
3713 default:
3714 ret = -EBADR;
3715 goto fail_rport_msg;
3716 }
3717
3718 ret = i->f->bsg_request(job);
3719 if (!ret)
3720 return 0;
3721
3722 fail_rport_msg:
3723 /* return the errno failure code as the only status */
3724 BUG_ON(job->reply_len < sizeof(uint32_t));
3725 bsg_reply->reply_payload_rcv_len = 0;
3726 bsg_reply->result = ret;
3727 job->reply_len = sizeof(uint32_t);
3728 bsg_job_done(job, bsg_reply->result,
3729 bsg_reply->reply_payload_rcv_len);
3730 return 0;
3731 }
3732
3733 static int fc_bsg_dispatch(struct bsg_job *job)
3734 {
3735 struct Scsi_Host *shost = fc_bsg_to_shost(job);
3736
3737 if (scsi_is_fc_rport(job->dev))
3738 return fc_bsg_rport_dispatch(shost, job);
3739 else
3740 return fc_bsg_host_dispatch(shost, job);
3741 }
3742
3743 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport)
3744 {
3745 if (rport->port_state == FC_PORTSTATE_BLOCKED &&
3746 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3747 return BLK_STS_RESOURCE;
3748
3749 if (rport->port_state != FC_PORTSTATE_ONLINE)
3750 return BLK_STS_IOERR;
3751
3752 return BLK_STS_OK;
3753 }
3754
3755
3756 static int fc_bsg_dispatch_prep(struct bsg_job *job)
3757 {
3758 struct fc_rport *rport = fc_bsg_to_rport(job);
3759 blk_status_t ret;
3760
3761 ret = fc_bsg_rport_prep(rport);
3762 switch (ret) {
3763 case BLK_STS_OK:
3764 break;
3765 case BLK_STS_RESOURCE:
3766 return -EAGAIN;
3767 default:
3768 return -EIO;
3769 }
3770
3771 return fc_bsg_dispatch(job);
3772 }
3773
3774 /**
3775 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3776 * @shost: shost for fc_host
3777 * @fc_host: fc_host adding the structures to
3778 */
3779 static int
3780 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3781 {
3782 struct device *dev = &shost->shost_gendev;
3783 struct fc_internal *i = to_fc_internal(shost->transportt);
3784 struct request_queue *q;
3785 char bsg_name[20];
3786
3787 fc_host->rqst_q = NULL;
3788
3789 if (!i->f->bsg_request)
3790 return -ENOTSUPP;
3791
3792 snprintf(bsg_name, sizeof(bsg_name),
3793 "fc_host%d", shost->host_no);
3794
3795 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout,
3796 i->f->dd_bsg_size);
3797 if (IS_ERR(q)) {
3798 dev_err(dev,
3799 "fc_host%d: bsg interface failed to initialize - setup queue\n",
3800 shost->host_no);
3801 return PTR_ERR(q);
3802 }
3803 __scsi_init_queue(shost, q);
3804 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
3805 fc_host->rqst_q = q;
3806 return 0;
3807 }
3808
3809 /**
3810 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3811 * @shost: shost that rport is attached to
3812 * @rport: rport that the bsg hooks are being attached to
3813 */
3814 static int
3815 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3816 {
3817 struct device *dev = &rport->dev;
3818 struct fc_internal *i = to_fc_internal(shost->transportt);
3819 struct request_queue *q;
3820
3821 rport->rqst_q = NULL;
3822
3823 if (!i->f->bsg_request)
3824 return -ENOTSUPP;
3825
3826 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep,
3827 fc_bsg_job_timeout, i->f->dd_bsg_size);
3828 if (IS_ERR(q)) {
3829 dev_err(dev, "failed to setup bsg queue\n");
3830 return PTR_ERR(q);
3831 }
3832 __scsi_init_queue(shost, q);
3833 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
3834 rport->rqst_q = q;
3835 return 0;
3836 }
3837
3838
3839 /**
3840 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3841 * @q: the request_queue that is to be torn down.
3842 *
3843 * Notes:
3844 * Before unregistering the queue empty any requests that are blocked
3845 *
3846 *
3847 */
3848 static void
3849 fc_bsg_remove(struct request_queue *q)
3850 {
3851 bsg_remove_queue(q);
3852 }
3853
3854
3855 /* Original Author: Martin Hicks */
3856 MODULE_AUTHOR("James Smart");
3857 MODULE_DESCRIPTION("FC Transport Attributes");
3858 MODULE_LICENSE("GPL");
3859
3860 module_init(fc_transport_init);
3861 module_exit(fc_transport_exit);
Linux with added FPC-III support