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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / scsi / scsi_transport_fc.c
bloba926e8f9e56e43efa0c3f8ff2235746c47bf453a
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 <uapi/scsi/fc/fc_els.h>
26 #include "scsi_priv.h"
27
28 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
29 static void fc_vport_sched_delete(struct work_struct *work);
30 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
31 struct device *pdev, struct fc_vport_identifiers *ids,
32 struct fc_vport **vport);
33 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
34 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
35 static void fc_bsg_remove(struct request_queue *);
36 static void fc_bsg_goose_queue(struct fc_rport *);
37 static void fc_li_stats_update(struct fc_fn_li_desc *li_desc,
38 struct fc_fpin_stats *stats);
39 static void fc_delivery_stats_update(u32 reason_code,
40 struct fc_fpin_stats *stats);
41 static void fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats);
42
43 /*
44 * Module Parameters
45 */
46
47 /*
48 * dev_loss_tmo: the default number of seconds that the FC transport
49 * should insulate the loss of a remote port.
50 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
51 */
52 static unsigned int fc_dev_loss_tmo = 60; /* seconds */
53
54 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
55 MODULE_PARM_DESC(dev_loss_tmo,
56 "Maximum number of seconds that the FC transport should"
57 " insulate the loss of a remote port. Once this value is"
58 " exceeded, the scsi target is removed. Value should be"
59 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
60 " fast_io_fail_tmo is not set.");
61
62 /*
63 * Redefine so that we can have same named attributes in the
64 * sdev/starget/host objects.
65 */
66 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
67 struct device_attribute device_attr_##_prefix##_##_name = \
68 __ATTR(_name,_mode,_show,_store)
69
70 #define fc_enum_name_search(title, table_type, table) \
71 static const char *get_fc_##title##_name(enum table_type table_key) \
72 { \
73 int i; \
74 char *name = NULL; \
75 \
76 for (i = 0; i < ARRAY_SIZE(table); i++) { \
77 if (table[i].value == table_key) { \
78 name = table[i].name; \
79 break; \
80 } \
81 } \
82 return name; \
83 }
84
85 #define fc_enum_name_match(title, table_type, table) \
86 static int get_fc_##title##_match(const char *table_key, \
87 enum table_type *value) \
88 { \
89 int i; \
90 \
91 for (i = 0; i < ARRAY_SIZE(table); i++) { \
92 if (strncmp(table_key, table[i].name, \
93 table[i].matchlen) == 0) { \
94 *value = table[i].value; \
95 return 0; /* success */ \
96 } \
97 } \
98 return 1; /* failure */ \
99 }
100
101
102 /* Convert fc_port_type values to ascii string name */
103 static struct {
104 enum fc_port_type value;
105 char *name;
106 } fc_port_type_names[] = {
107 { FC_PORTTYPE_UNKNOWN, "Unknown" },
108 { FC_PORTTYPE_OTHER, "Other" },
109 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
110 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
111 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
112 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
113 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
114 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
115 };
116 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
117 #define FC_PORTTYPE_MAX_NAMELEN 50
118
119 /* Reuse fc_port_type enum function for vport_type */
120 #define get_fc_vport_type_name get_fc_port_type_name
121
122
123 /* Convert fc_host_event_code values to ascii string name */
124 static const struct {
125 enum fc_host_event_code value;
126 char *name;
127 } fc_host_event_code_names[] = {
128 { FCH_EVT_LIP, "lip" },
129 { FCH_EVT_LINKUP, "link_up" },
130 { FCH_EVT_LINKDOWN, "link_down" },
131 { FCH_EVT_LIPRESET, "lip_reset" },
132 { FCH_EVT_RSCN, "rscn" },
133 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
134 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
135 { FCH_EVT_PORT_ONLINE, "port_online" },
136 { FCH_EVT_PORT_OFFLINE, "port_offline" },
137 { FCH_EVT_PORT_FABRIC, "port_fabric" },
138 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
139 { FCH_EVT_LINK_FPIN, "link_FPIN" },
140 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
141 };
142 fc_enum_name_search(host_event_code, fc_host_event_code,
143 fc_host_event_code_names)
144 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
145
146
147 /* Convert fc_port_state values to ascii string name */
148 static struct {
149 enum fc_port_state value;
150 char *name;
151 } fc_port_state_names[] = {
152 { FC_PORTSTATE_UNKNOWN, "Unknown" },
153 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
154 { FC_PORTSTATE_ONLINE, "Online" },
155 { FC_PORTSTATE_OFFLINE, "Offline" },
156 { FC_PORTSTATE_BLOCKED, "Blocked" },
157 { FC_PORTSTATE_BYPASSED, "Bypassed" },
158 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
159 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
160 { FC_PORTSTATE_ERROR, "Error" },
161 { FC_PORTSTATE_LOOPBACK, "Loopback" },
162 { FC_PORTSTATE_DELETED, "Deleted" },
163 };
164 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
165 #define FC_PORTSTATE_MAX_NAMELEN 20
166
167
168 /* Convert fc_vport_state values to ascii string name */
169 static struct {
170 enum fc_vport_state value;
171 char *name;
172 } fc_vport_state_names[] = {
173 { FC_VPORT_UNKNOWN, "Unknown" },
174 { FC_VPORT_ACTIVE, "Active" },
175 { FC_VPORT_DISABLED, "Disabled" },
176 { FC_VPORT_LINKDOWN, "Linkdown" },
177 { FC_VPORT_INITIALIZING, "Initializing" },
178 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
179 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
180 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
181 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
182 { FC_VPORT_FAILED, "VPort Failed" },
183 };
184 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
185 #define FC_VPORTSTATE_MAX_NAMELEN 24
186
187 /* Reuse fc_vport_state enum function for vport_last_state */
188 #define get_fc_vport_last_state_name get_fc_vport_state_name
189
190
191 /* Convert fc_tgtid_binding_type values to ascii string name */
192 static const struct {
193 enum fc_tgtid_binding_type value;
194 char *name;
195 int matchlen;
196 } fc_tgtid_binding_type_names[] = {
197 { FC_TGTID_BIND_NONE, "none", 4 },
198 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
199 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
200 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
201 };
202 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
203 fc_tgtid_binding_type_names)
204 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
205 fc_tgtid_binding_type_names)
206 #define FC_BINDTYPE_MAX_NAMELEN 30
207
208
209 #define fc_bitfield_name_search(title, table) \
210 static ssize_t \
211 get_fc_##title##_names(u32 table_key, char *buf) \
212 { \
213 char *prefix = ""; \
214 ssize_t len = 0; \
215 int i; \
216 \
217 for (i = 0; i < ARRAY_SIZE(table); i++) { \
218 if (table[i].value & table_key) { \
219 len += sprintf(buf + len, "%s%s", \
220 prefix, table[i].name); \
221 prefix = ", "; \
222 } \
223 } \
224 len += sprintf(buf + len, "\n"); \
225 return len; \
226 }
227
228
229 /* Convert FC_COS bit values to ascii string name */
230 static const struct {
231 u32 value;
232 char *name;
233 } fc_cos_names[] = {
234 { FC_COS_CLASS1, "Class 1" },
235 { FC_COS_CLASS2, "Class 2" },
236 { FC_COS_CLASS3, "Class 3" },
237 { FC_COS_CLASS4, "Class 4" },
238 { FC_COS_CLASS6, "Class 6" },
239 };
240 fc_bitfield_name_search(cos, fc_cos_names)
241
242
243 /* Convert FC_PORTSPEED bit values to ascii string name */
244 static const struct {
245 u32 value;
246 char *name;
247 } fc_port_speed_names[] = {
248 { FC_PORTSPEED_1GBIT, "1 Gbit" },
249 { FC_PORTSPEED_2GBIT, "2 Gbit" },
250 { FC_PORTSPEED_4GBIT, "4 Gbit" },
251 { FC_PORTSPEED_10GBIT, "10 Gbit" },
252 { FC_PORTSPEED_8GBIT, "8 Gbit" },
253 { FC_PORTSPEED_16GBIT, "16 Gbit" },
254 { FC_PORTSPEED_32GBIT, "32 Gbit" },
255 { FC_PORTSPEED_20GBIT, "20 Gbit" },
256 { FC_PORTSPEED_40GBIT, "40 Gbit" },
257 { FC_PORTSPEED_50GBIT, "50 Gbit" },
258 { FC_PORTSPEED_100GBIT, "100 Gbit" },
259 { FC_PORTSPEED_25GBIT, "25 Gbit" },
260 { FC_PORTSPEED_64GBIT, "64 Gbit" },
261 { FC_PORTSPEED_128GBIT, "128 Gbit" },
262 { FC_PORTSPEED_256GBIT, "256 Gbit" },
263 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
264 };
265 fc_bitfield_name_search(port_speed, fc_port_speed_names)
266
267
268 static int
269 show_fc_fc4s (char *buf, u8 *fc4_list)
270 {
271 int i, len=0;
272
273 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
274 len += sprintf(buf + len , "0x%02x ", *fc4_list);
275 len += sprintf(buf + len, "\n");
276 return len;
277 }
278
279
280 /* Convert FC_PORT_ROLE bit values to ascii string name */
281 static const struct {
282 u32 value;
283 char *name;
284 } fc_port_role_names[] = {
285 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
286 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
287 { FC_PORT_ROLE_IP_PORT, "IP Port" },
288 { FC_PORT_ROLE_FCP_DUMMY_INITIATOR, "FCP Dummy Initiator" },
289 { FC_PORT_ROLE_NVME_INITIATOR, "NVMe Initiator" },
290 { FC_PORT_ROLE_NVME_TARGET, "NVMe Target" },
291 { FC_PORT_ROLE_NVME_DISCOVERY, "NVMe Discovery" },
292 };
293 fc_bitfield_name_search(port_roles, fc_port_role_names)
294
295 /*
296 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
297 */
298 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
299 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
300 #define FC_FPORT_PORTID 0x00000e
301 #define FC_FABCTLR_PORTID 0x00000d
302 #define FC_DIRSRVR_PORTID 0x00000c
303 #define FC_TIMESRVR_PORTID 0x00000b
304 #define FC_MGMTSRVR_PORTID 0x00000a
305
306
307 static void fc_timeout_deleted_rport(struct work_struct *work);
308 static void fc_timeout_fail_rport_io(struct work_struct *work);
309 static void fc_scsi_scan_rport(struct work_struct *work);
310
311 /*
312 * Attribute counts pre object type...
313 * Increase these values if you add attributes
314 */
315 #define FC_STARGET_NUM_ATTRS 3
316 #define FC_RPORT_NUM_ATTRS 10
317 #define FC_VPORT_NUM_ATTRS 9
318 #define FC_HOST_NUM_ATTRS 29
319
320 struct fc_internal {
321 struct scsi_transport_template t;
322 struct fc_function_template *f;
323
324 /*
325 * For attributes : each object has :
326 * An array of the actual attributes structures
327 * An array of null-terminated pointers to the attribute
328 * structures - used for mid-layer interaction.
329 *
330 * The attribute containers for the starget and host are are
331 * part of the midlayer. As the remote port is specific to the
332 * fc transport, we must provide the attribute container.
333 */
334 struct device_attribute private_starget_attrs[
335 FC_STARGET_NUM_ATTRS];
336 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
337
338 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
339 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
340
341 struct transport_container rport_attr_cont;
342 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
343 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
344
345 struct transport_container vport_attr_cont;
346 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
347 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
348 };
349
350 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
351
352 static int fc_target_setup(struct transport_container *tc, struct device *dev,
353 struct device *cdev)
354 {
355 struct scsi_target *starget = to_scsi_target(dev);
356 struct fc_rport *rport = starget_to_rport(starget);
357
358 /*
359 * if parent is remote port, use values from remote port.
360 * Otherwise, this host uses the fc_transport, but not the
361 * remote port interface. As such, initialize to known non-values.
362 */
363 if (rport) {
364 fc_starget_node_name(starget) = rport->node_name;
365 fc_starget_port_name(starget) = rport->port_name;
366 fc_starget_port_id(starget) = rport->port_id;
367 } else {
368 fc_starget_node_name(starget) = -1;
369 fc_starget_port_name(starget) = -1;
370 fc_starget_port_id(starget) = -1;
371 }
372
373 return 0;
374 }
375
376 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
377 "fc_transport",
378 fc_target_setup,
379 NULL,
380 NULL);
381
382 static int fc_host_setup(struct transport_container *tc, struct device *dev,
383 struct device *cdev)
384 {
385 struct Scsi_Host *shost = dev_to_shost(dev);
386 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
387
388 /*
389 * Set default values easily detected by the midlayer as
390 * failure cases. The scsi lldd is responsible for initializing
391 * all transport attributes to valid values per host.
392 */
393 fc_host->node_name = -1;
394 fc_host->port_name = -1;
395 fc_host->permanent_port_name = -1;
396 fc_host->supported_classes = FC_COS_UNSPECIFIED;
397 memset(fc_host->supported_fc4s, 0,
398 sizeof(fc_host->supported_fc4s));
399 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
400 fc_host->maxframe_size = -1;
401 fc_host->max_npiv_vports = 0;
402 memset(fc_host->serial_number, 0,
403 sizeof(fc_host->serial_number));
404 memset(fc_host->manufacturer, 0,
405 sizeof(fc_host->manufacturer));
406 memset(fc_host->model, 0,
407 sizeof(fc_host->model));
408 memset(fc_host->model_description, 0,
409 sizeof(fc_host->model_description));
410 memset(fc_host->hardware_version, 0,
411 sizeof(fc_host->hardware_version));
412 memset(fc_host->driver_version, 0,
413 sizeof(fc_host->driver_version));
414 memset(fc_host->firmware_version, 0,
415 sizeof(fc_host->firmware_version));
416 memset(fc_host->optionrom_version, 0,
417 sizeof(fc_host->optionrom_version));
418
419 fc_host->port_id = -1;
420 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
421 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
422 memset(fc_host->active_fc4s, 0,
423 sizeof(fc_host->active_fc4s));
424 fc_host->speed = FC_PORTSPEED_UNKNOWN;
425 fc_host->fabric_name = -1;
426 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
427 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
428 memset(&fc_host->fpin_stats, 0, sizeof(fc_host->fpin_stats));
429
430 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
431
432 INIT_LIST_HEAD(&fc_host->rports);
433 INIT_LIST_HEAD(&fc_host->rport_bindings);
434 INIT_LIST_HEAD(&fc_host->vports);
435 fc_host->next_rport_number = 0;
436 fc_host->next_target_id = 0;
437 fc_host->next_vport_number = 0;
438 fc_host->npiv_vports_inuse = 0;
439
440 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
441 "fc_wq_%d", shost->host_no);
442 fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
443 if (!fc_host->work_q)
444 return -ENOMEM;
445
446 fc_host->dev_loss_tmo = fc_dev_loss_tmo;
447 snprintf(fc_host->devloss_work_q_name,
448 sizeof(fc_host->devloss_work_q_name),
449 "fc_dl_%d", shost->host_no);
450 fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
451 fc_host->devloss_work_q_name);
452 if (!fc_host->devloss_work_q) {
453 destroy_workqueue(fc_host->work_q);
454 fc_host->work_q = NULL;
455 return -ENOMEM;
456 }
457
458 fc_bsg_hostadd(shost, fc_host);
459 /* ignore any bsg add error - we just can't do sgio */
460
461 return 0;
462 }
463
464 static int fc_host_remove(struct transport_container *tc, struct device *dev,
465 struct device *cdev)
466 {
467 struct Scsi_Host *shost = dev_to_shost(dev);
468 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
469
470 fc_bsg_remove(fc_host->rqst_q);
471 return 0;
472 }
473
474 static DECLARE_TRANSPORT_CLASS(fc_host_class,
475 "fc_host",
476 fc_host_setup,
477 fc_host_remove,
478 NULL);
479
480 /*
481 * Setup and Remove actions for remote ports are handled
482 * in the service functions below.
483 */
484 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
485 "fc_remote_ports",
486 NULL,
487 NULL,
488 NULL);
489
490 /*
491 * Setup and Remove actions for virtual ports are handled
492 * in the service functions below.
493 */
494 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
495 "fc_vports",
496 NULL,
497 NULL,
498 NULL);
499
500 /*
501 * Netlink Infrastructure
502 */
503
504 static atomic_t fc_event_seq;
505
506 /**
507 * fc_get_event_number - Obtain the next sequential FC event number
508 *
509 * Notes:
510 * We could have inlined this, but it would have required fc_event_seq to
511 * be exposed. For now, live with the subroutine call.
512 * Atomic used to avoid lock/unlock...
513 */
514 u32
515 fc_get_event_number(void)
516 {
517 return atomic_add_return(1, &fc_event_seq);
518 }
519 EXPORT_SYMBOL(fc_get_event_number);
520
521 /**
522 * fc_host_post_fc_event - routine to do the work of posting an event
523 * on an fc_host.
524 * @shost: host the event occurred on
525 * @event_number: fc event number obtained from get_fc_event_number()
526 * @event_code: fc_host event being posted
527 * @data_len: amount, in bytes, of event data
528 * @data_buf: pointer to event data
529 * @vendor_id: value for Vendor id
530 *
531 * Notes:
532 * This routine assumes no locks are held on entry.
533 */
534 void
535 fc_host_post_fc_event(struct Scsi_Host *shost, u32 event_number,
536 enum fc_host_event_code event_code,
537 u32 data_len, char *data_buf, u64 vendor_id)
538 {
539 struct sk_buff *skb;
540 struct nlmsghdr *nlh;
541 struct fc_nl_event *event;
542 const char *name;
543 u32 len;
544 int err;
545
546 if (!data_buf || data_len < 4)
547 data_len = 0;
548
549 if (!scsi_nl_sock) {
550 err = -ENOENT;
551 goto send_fail;
552 }
553
554 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
555
556 skb = nlmsg_new(len, GFP_KERNEL);
557 if (!skb) {
558 err = -ENOBUFS;
559 goto send_fail;
560 }
561
562 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
563 if (!nlh) {
564 err = -ENOBUFS;
565 goto send_fail_skb;
566 }
567 event = nlmsg_data(nlh);
568
569 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
570 FC_NL_ASYNC_EVENT, len);
571 event->seconds = ktime_get_real_seconds();
572 event->vendor_id = vendor_id;
573 event->host_no = shost->host_no;
574 event->event_datalen = data_len; /* bytes */
575 event->event_num = event_number;
576 event->event_code = event_code;
577 if (data_len)
578 memcpy(&event->event_data, data_buf, data_len);
579
580 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
581 GFP_KERNEL);
582 return;
583
584 send_fail_skb:
585 kfree_skb(skb);
586 send_fail:
587 name = get_fc_host_event_code_name(event_code);
588 printk(KERN_WARNING
589 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
590 __func__, shost->host_no,
591 (name) ? name : "<unknown>",
592 (data_len) ? *((u32 *)data_buf) : 0xFFFFFFFF, err);
593 return;
594 }
595 EXPORT_SYMBOL(fc_host_post_fc_event);
596
597 /**
598 * fc_host_post_event - called to post an even on an fc_host.
599 * @shost: host the event occurred on
600 * @event_number: fc event number obtained from get_fc_event_number()
601 * @event_code: fc_host event being posted
602 * @event_data: 32bits of data for the event being posted
603 *
604 * Notes:
605 * This routine assumes no locks are held on entry.
606 */
607 void
608 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
609 enum fc_host_event_code event_code, u32 event_data)
610 {
611 fc_host_post_fc_event(shost, event_number, event_code,
612 (u32)sizeof(u32), (char *)&event_data, 0);
613 }
614 EXPORT_SYMBOL(fc_host_post_event);
615
616
617 /**
618 * fc_host_post_vendor_event - called to post a vendor unique event
619 * on an fc_host
620 * @shost: host the event occurred on
621 * @event_number: fc event number obtained from get_fc_event_number()
622 * @data_len: amount, in bytes, of vendor unique data
623 * @data_buf: pointer to vendor unique data
624 * @vendor_id: Vendor id
625 *
626 * Notes:
627 * This routine assumes no locks are held on entry.
628 */
629 void
630 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
631 u32 data_len, char * data_buf, u64 vendor_id)
632 {
633 fc_host_post_fc_event(shost, event_number, FCH_EVT_VENDOR_UNIQUE,
634 data_len, data_buf, vendor_id);
635 }
636 EXPORT_SYMBOL(fc_host_post_vendor_event);
637
638 /**
639 * fc_find_rport_by_wwpn - find the fc_rport pointer for a given wwpn
640 * @shost: host the fc_rport is associated with
641 * @wwpn: wwpn of the fc_rport device
642 *
643 * Notes:
644 * This routine assumes no locks are held on entry.
645 */
646 struct fc_rport *
647 fc_find_rport_by_wwpn(struct Scsi_Host *shost, u64 wwpn)
648 {
649 struct fc_rport *rport;
650 unsigned long flags;
651
652 spin_lock_irqsave(shost->host_lock, flags);
653
654 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
655 if (rport->port_state != FC_PORTSTATE_ONLINE)
656 continue;
657
658 if (rport->port_name == wwpn) {
659 spin_unlock_irqrestore(shost->host_lock, flags);
660 return rport;
661 }
662 }
663
664 spin_unlock_irqrestore(shost->host_lock, flags);
665 return NULL;
666 }
667 EXPORT_SYMBOL(fc_find_rport_by_wwpn);
668
669 static void
670 fc_li_stats_update(struct fc_fn_li_desc *li_desc,
671 struct fc_fpin_stats *stats)
672 {
673 stats->li += be32_to_cpu(li_desc->event_count);
674 switch (be16_to_cpu(li_desc->event_type)) {
675 case FPIN_LI_UNKNOWN:
676 stats->li_failure_unknown +=
677 be32_to_cpu(li_desc->event_count);
678 break;
679 case FPIN_LI_LINK_FAILURE:
680 stats->li_link_failure_count +=
681 be32_to_cpu(li_desc->event_count);
682 break;
683 case FPIN_LI_LOSS_OF_SYNC:
684 stats->li_loss_of_sync_count +=
685 be32_to_cpu(li_desc->event_count);
686 break;
687 case FPIN_LI_LOSS_OF_SIG:
688 stats->li_loss_of_signals_count +=
689 be32_to_cpu(li_desc->event_count);
690 break;
691 case FPIN_LI_PRIM_SEQ_ERR:
692 stats->li_prim_seq_err_count +=
693 be32_to_cpu(li_desc->event_count);
694 break;
695 case FPIN_LI_INVALID_TX_WD:
696 stats->li_invalid_tx_word_count +=
697 be32_to_cpu(li_desc->event_count);
698 break;
699 case FPIN_LI_INVALID_CRC:
700 stats->li_invalid_crc_count +=
701 be32_to_cpu(li_desc->event_count);
702 break;
703 case FPIN_LI_DEVICE_SPEC:
704 stats->li_device_specific +=
705 be32_to_cpu(li_desc->event_count);
706 break;
707 }
708 }
709
710 static void
711 fc_delivery_stats_update(u32 reason_code, struct fc_fpin_stats *stats)
712 {
713 stats->dn++;
714 switch (reason_code) {
715 case FPIN_DELI_UNKNOWN:
716 stats->dn_unknown++;
717 break;
718 case FPIN_DELI_TIMEOUT:
719 stats->dn_timeout++;
720 break;
721 case FPIN_DELI_UNABLE_TO_ROUTE:
722 stats->dn_unable_to_route++;
723 break;
724 case FPIN_DELI_DEVICE_SPEC:
725 stats->dn_device_specific++;
726 break;
727 }
728 }
729
730 static void
731 fc_cn_stats_update(u16 event_type, struct fc_fpin_stats *stats)
732 {
733 stats->cn++;
734 switch (event_type) {
735 case FPIN_CONGN_CLEAR:
736 stats->cn_clear++;
737 break;
738 case FPIN_CONGN_LOST_CREDIT:
739 stats->cn_lost_credit++;
740 break;
741 case FPIN_CONGN_CREDIT_STALL:
742 stats->cn_credit_stall++;
743 break;
744 case FPIN_CONGN_OVERSUBSCRIPTION:
745 stats->cn_oversubscription++;
746 break;
747 case FPIN_CONGN_DEVICE_SPEC:
748 stats->cn_device_specific++;
749 }
750 }
751
752 /*
753 * fc_fpin_li_stats_update - routine to update Link Integrity
754 * event statistics.
755 * @shost: host the FPIN was received on
756 * @tlv: pointer to link integrity descriptor
757 *
758 */
759 static void
760 fc_fpin_li_stats_update(struct Scsi_Host *shost, struct fc_tlv_desc *tlv)
761 {
762 u8 i;
763 struct fc_rport *rport = NULL;
764 struct fc_rport *attach_rport = NULL;
765 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
766 struct fc_fn_li_desc *li_desc = (struct fc_fn_li_desc *)tlv;
767 u64 wwpn;
768
769 rport = fc_find_rport_by_wwpn(shost,
770 be64_to_cpu(li_desc->attached_wwpn));
771 if (rport &&
772 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
773 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
774 attach_rport = rport;
775 fc_li_stats_update(li_desc, &attach_rport->fpin_stats);
776 }
777
778 if (be32_to_cpu(li_desc->pname_count) > 0) {
779 for (i = 0;
780 i < be32_to_cpu(li_desc->pname_count);
781 i++) {
782 wwpn = be64_to_cpu(li_desc->pname_list[i]);
783 rport = fc_find_rport_by_wwpn(shost, wwpn);
784 if (rport &&
785 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
786 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
787 if (rport == attach_rport)
788 continue;
789 fc_li_stats_update(li_desc,
790 &rport->fpin_stats);
791 }
792 }
793 }
794
795 if (fc_host->port_name == be64_to_cpu(li_desc->attached_wwpn))
796 fc_li_stats_update(li_desc, &fc_host->fpin_stats);
797 }
798
799 /*
800 * fc_fpin_delivery_stats_update - routine to update Delivery Notification
801 * event statistics.
802 * @shost: host the FPIN was received on
803 * @tlv: pointer to delivery descriptor
804 *
805 */
806 static void
807 fc_fpin_delivery_stats_update(struct Scsi_Host *shost,
808 struct fc_tlv_desc *tlv)
809 {
810 struct fc_rport *rport = NULL;
811 struct fc_rport *attach_rport = NULL;
812 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
813 struct fc_fn_deli_desc *dn_desc = (struct fc_fn_deli_desc *)tlv;
814 u32 reason_code = be32_to_cpu(dn_desc->deli_reason_code);
815
816 rport = fc_find_rport_by_wwpn(shost,
817 be64_to_cpu(dn_desc->attached_wwpn));
818 if (rport &&
819 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
820 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
821 attach_rport = rport;
822 fc_delivery_stats_update(reason_code,
823 &attach_rport->fpin_stats);
824 }
825
826 if (fc_host->port_name == be64_to_cpu(dn_desc->attached_wwpn))
827 fc_delivery_stats_update(reason_code, &fc_host->fpin_stats);
828 }
829
830 /*
831 * fc_fpin_peer_congn_stats_update - routine to update Peer Congestion
832 * event statistics.
833 * @shost: host the FPIN was received on
834 * @tlv: pointer to peer congestion descriptor
835 *
836 */
837 static void
838 fc_fpin_peer_congn_stats_update(struct Scsi_Host *shost,
839 struct fc_tlv_desc *tlv)
840 {
841 u8 i;
842 struct fc_rport *rport = NULL;
843 struct fc_rport *attach_rport = NULL;
844 struct fc_fn_peer_congn_desc *pc_desc =
845 (struct fc_fn_peer_congn_desc *)tlv;
846 u16 event_type = be16_to_cpu(pc_desc->event_type);
847 u64 wwpn;
848
849 rport = fc_find_rport_by_wwpn(shost,
850 be64_to_cpu(pc_desc->attached_wwpn));
851 if (rport &&
852 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
853 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
854 attach_rport = rport;
855 fc_cn_stats_update(event_type, &attach_rport->fpin_stats);
856 }
857
858 if (be32_to_cpu(pc_desc->pname_count) > 0) {
859 for (i = 0;
860 i < be32_to_cpu(pc_desc->pname_count);
861 i++) {
862 wwpn = be64_to_cpu(pc_desc->pname_list[i]);
863 rport = fc_find_rport_by_wwpn(shost, wwpn);
864 if (rport &&
865 (rport->roles & FC_PORT_ROLE_FCP_TARGET ||
866 rport->roles & FC_PORT_ROLE_NVME_TARGET)) {
867 if (rport == attach_rport)
868 continue;
869 fc_cn_stats_update(event_type,
870 &rport->fpin_stats);
871 }
872 }
873 }
874 }
875
876 /*
877 * fc_fpin_congn_stats_update - routine to update Congestion
878 * event statistics.
879 * @shost: host the FPIN was received on
880 * @tlv: pointer to congestion descriptor
881 *
882 */
883 static void
884 fc_fpin_congn_stats_update(struct Scsi_Host *shost,
885 struct fc_tlv_desc *tlv)
886 {
887 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
888 struct fc_fn_congn_desc *congn = (struct fc_fn_congn_desc *)tlv;
889
890 fc_cn_stats_update(be16_to_cpu(congn->event_type),
891 &fc_host->fpin_stats);
892 }
893
894 /**
895 * fc_host_fpin_rcv - routine to process a received FPIN.
896 * @shost: host the FPIN was received on
897 * @fpin_len: length of FPIN payload, in bytes
898 * @fpin_buf: pointer to FPIN payload
899 *
900 * Notes:
901 * This routine assumes no locks are held on entry.
902 */
903 void
904 fc_host_fpin_rcv(struct Scsi_Host *shost, u32 fpin_len, char *fpin_buf)
905 {
906 struct fc_els_fpin *fpin = (struct fc_els_fpin *)fpin_buf;
907 struct fc_tlv_desc *tlv;
908 u32 desc_cnt = 0, bytes_remain;
909 u32 dtag;
910
911 /* Update Statistics */
912 tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
913 bytes_remain = fpin_len - offsetof(struct fc_els_fpin, fpin_desc);
914 bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
915
916 while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
917 bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
918 dtag = be32_to_cpu(tlv->desc_tag);
919 switch (dtag) {
920 case ELS_DTAG_LNK_INTEGRITY:
921 fc_fpin_li_stats_update(shost, tlv);
922 break;
923 case ELS_DTAG_DELIVERY:
924 fc_fpin_delivery_stats_update(shost, tlv);
925 break;
926 case ELS_DTAG_PEER_CONGEST:
927 fc_fpin_peer_congn_stats_update(shost, tlv);
928 break;
929 case ELS_DTAG_CONGESTION:
930 fc_fpin_congn_stats_update(shost, tlv);
931 }
932
933 desc_cnt++;
934 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
935 tlv = fc_tlv_next_desc(tlv);
936 }
937
938 fc_host_post_fc_event(shost, fc_get_event_number(),
939 FCH_EVT_LINK_FPIN, fpin_len, fpin_buf, 0);
940 }
941 EXPORT_SYMBOL(fc_host_fpin_rcv);
942
943
944 static __init int fc_transport_init(void)
945 {
946 int error;
947
948 atomic_set(&fc_event_seq, 0);
949
950 error = transport_class_register(&fc_host_class);
951 if (error)
952 return error;
953 error = transport_class_register(&fc_vport_class);
954 if (error)
955 goto unreg_host_class;
956 error = transport_class_register(&fc_rport_class);
957 if (error)
958 goto unreg_vport_class;
959 error = transport_class_register(&fc_transport_class);
960 if (error)
961 goto unreg_rport_class;
962 return 0;
963
964 unreg_rport_class:
965 transport_class_unregister(&fc_rport_class);
966 unreg_vport_class:
967 transport_class_unregister(&fc_vport_class);
968 unreg_host_class:
969 transport_class_unregister(&fc_host_class);
970 return error;
971 }
972
973 static void __exit fc_transport_exit(void)
974 {
975 transport_class_unregister(&fc_transport_class);
976 transport_class_unregister(&fc_rport_class);
977 transport_class_unregister(&fc_host_class);
978 transport_class_unregister(&fc_vport_class);
979 }
980
981 /*
982 * FC Remote Port Attribute Management
983 */
984
985 #define fc_rport_show_function(field, format_string, sz, cast) \
986 static ssize_t \
987 show_fc_rport_##field (struct device *dev, \
988 struct device_attribute *attr, char *buf) \
989 { \
990 struct fc_rport *rport = transport_class_to_rport(dev); \
991 struct Scsi_Host *shost = rport_to_shost(rport); \
992 struct fc_internal *i = to_fc_internal(shost->transportt); \
993 if ((i->f->get_rport_##field) && \
994 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
995 (rport->port_state == FC_PORTSTATE_DELETED) || \
996 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
997 i->f->get_rport_##field(rport); \
998 return snprintf(buf, sz, format_string, cast rport->field); \
999 }
1000
1001 #define fc_rport_store_function(field) \
1002 static ssize_t \
1003 store_fc_rport_##field(struct device *dev, \
1004 struct device_attribute *attr, \
1005 const char *buf, size_t count) \
1006 { \
1007 int val; \
1008 struct fc_rport *rport = transport_class_to_rport(dev); \
1009 struct Scsi_Host *shost = rport_to_shost(rport); \
1010 struct fc_internal *i = to_fc_internal(shost->transportt); \
1011 char *cp; \
1012 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
1013 (rport->port_state == FC_PORTSTATE_DELETED) || \
1014 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
1015 return -EBUSY; \
1016 val = simple_strtoul(buf, &cp, 0); \
1017 if (*cp && (*cp != '\n')) \
1018 return -EINVAL; \
1019 i->f->set_rport_##field(rport, val); \
1020 return count; \
1021 }
1022
1023 #define fc_rport_rd_attr(field, format_string, sz) \
1024 fc_rport_show_function(field, format_string, sz, ) \
1025 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1026 show_fc_rport_##field, NULL)
1027
1028 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
1029 fc_rport_show_function(field, format_string, sz, (cast)) \
1030 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1031 show_fc_rport_##field, NULL)
1032
1033 #define fc_rport_rw_attr(field, format_string, sz) \
1034 fc_rport_show_function(field, format_string, sz, ) \
1035 fc_rport_store_function(field) \
1036 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
1037 show_fc_rport_##field, \
1038 store_fc_rport_##field)
1039
1040
1041 #define fc_private_rport_show_function(field, format_string, sz, cast) \
1042 static ssize_t \
1043 show_fc_rport_##field (struct device *dev, \
1044 struct device_attribute *attr, char *buf) \
1045 { \
1046 struct fc_rport *rport = transport_class_to_rport(dev); \
1047 return snprintf(buf, sz, format_string, cast rport->field); \
1048 }
1049
1050 #define fc_private_rport_rd_attr(field, format_string, sz) \
1051 fc_private_rport_show_function(field, format_string, sz, ) \
1052 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1053 show_fc_rport_##field, NULL)
1054
1055 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
1056 fc_private_rport_show_function(field, format_string, sz, (cast)) \
1057 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
1058 show_fc_rport_##field, NULL)
1059
1060
1061 #define fc_private_rport_rd_enum_attr(title, maxlen) \
1062 static ssize_t \
1063 show_fc_rport_##title (struct device *dev, \
1064 struct device_attribute *attr, char *buf) \
1065 { \
1066 struct fc_rport *rport = transport_class_to_rport(dev); \
1067 const char *name; \
1068 name = get_fc_##title##_name(rport->title); \
1069 if (!name) \
1070 return -EINVAL; \
1071 return snprintf(buf, maxlen, "%s\n", name); \
1072 } \
1073 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
1074 show_fc_rport_##title, NULL)
1075
1076
1077 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
1078 i->private_rport_attrs[count] = device_attr_rport_##field; \
1079 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
1080 i->private_rport_attrs[count].store = NULL; \
1081 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1082 if (i->f->show_rport_##field) \
1083 count++
1084
1085 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
1086 i->private_rport_attrs[count] = device_attr_rport_##field; \
1087 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
1088 i->private_rport_attrs[count].store = NULL; \
1089 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1090 count++
1091
1092 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
1093 i->private_rport_attrs[count] = device_attr_rport_##field; \
1094 if (!i->f->set_rport_##field) { \
1095 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
1096 i->private_rport_attrs[count].store = NULL; \
1097 } \
1098 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1099 if (i->f->show_rport_##field) \
1100 count++
1101
1102 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
1103 { \
1104 i->private_rport_attrs[count] = device_attr_rport_##field; \
1105 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
1106 count++; \
1107 }
1108
1109
1110 /* The FC Transport Remote Port Attributes: */
1111
1112 /* Fixed Remote Port Attributes */
1113
1114 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
1115
1116 static ssize_t
1117 show_fc_rport_supported_classes (struct device *dev,
1118 struct device_attribute *attr, char *buf)
1119 {
1120 struct fc_rport *rport = transport_class_to_rport(dev);
1121 if (rport->supported_classes == FC_COS_UNSPECIFIED)
1122 return snprintf(buf, 20, "unspecified\n");
1123 return get_fc_cos_names(rport->supported_classes, buf);
1124 }
1125 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
1126 show_fc_rport_supported_classes, NULL);
1127
1128 /* Dynamic Remote Port Attributes */
1129
1130 /*
1131 * dev_loss_tmo attribute
1132 */
1133 static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
1134 {
1135 char *cp;
1136
1137 *val = simple_strtoul(buf, &cp, 0);
1138 if (*cp && (*cp != '\n'))
1139 return -EINVAL;
1140 /*
1141 * Check for overflow; dev_loss_tmo is u32
1142 */
1143 if (*val > UINT_MAX)
1144 return -EINVAL;
1145
1146 return 0;
1147 }
1148
1149 static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
1150 unsigned long val)
1151 {
1152 struct Scsi_Host *shost = rport_to_shost(rport);
1153 struct fc_internal *i = to_fc_internal(shost->transportt);
1154
1155 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
1156 (rport->port_state == FC_PORTSTATE_DELETED) ||
1157 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
1158 return -EBUSY;
1159 /*
1160 * Check for overflow; dev_loss_tmo is u32
1161 */
1162 if (val > UINT_MAX)
1163 return -EINVAL;
1164
1165 /*
1166 * If fast_io_fail is off we have to cap
1167 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
1168 */
1169 if (rport->fast_io_fail_tmo == -1 &&
1170 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
1171 return -EINVAL;
1172
1173 i->f->set_rport_dev_loss_tmo(rport, val);
1174 return 0;
1175 }
1176
1177 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
1178 static ssize_t
1179 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
1180 const char *buf, size_t count)
1181 {
1182 struct fc_rport *rport = transport_class_to_rport(dev);
1183 unsigned long val;
1184 int rc;
1185
1186 rc = fc_str_to_dev_loss(buf, &val);
1187 if (rc)
1188 return rc;
1189
1190 rc = fc_rport_set_dev_loss_tmo(rport, val);
1191 if (rc)
1192 return rc;
1193 return count;
1194 }
1195 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
1196 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
1197
1198
1199 /* Private Remote Port Attributes */
1200
1201 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1202 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1203 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
1204
1205 static ssize_t
1206 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
1207 char *buf)
1208 {
1209 struct fc_rport *rport = transport_class_to_rport(dev);
1210
1211 /* identify any roles that are port_id specific */
1212 if ((rport->port_id != -1) &&
1213 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
1214 FC_WELLKNOWN_PORTID_MASK) {
1215 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
1216 case FC_FPORT_PORTID:
1217 return snprintf(buf, 30, "Fabric Port\n");
1218 case FC_FABCTLR_PORTID:
1219 return snprintf(buf, 30, "Fabric Controller\n");
1220 case FC_DIRSRVR_PORTID:
1221 return snprintf(buf, 30, "Directory Server\n");
1222 case FC_TIMESRVR_PORTID:
1223 return snprintf(buf, 30, "Time Server\n");
1224 case FC_MGMTSRVR_PORTID:
1225 return snprintf(buf, 30, "Management Server\n");
1226 default:
1227 return snprintf(buf, 30, "Unknown Fabric Entity\n");
1228 }
1229 } else {
1230 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
1231 return snprintf(buf, 20, "unknown\n");
1232 return get_fc_port_roles_names(rport->roles, buf);
1233 }
1234 }
1235 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
1236 show_fc_rport_roles, NULL);
1237
1238 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1239 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
1240
1241 /*
1242 * fast_io_fail_tmo attribute
1243 */
1244 static ssize_t
1245 show_fc_rport_fast_io_fail_tmo (struct device *dev,
1246 struct device_attribute *attr, char *buf)
1247 {
1248 struct fc_rport *rport = transport_class_to_rport(dev);
1249
1250 if (rport->fast_io_fail_tmo == -1)
1251 return snprintf(buf, 5, "off\n");
1252 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
1253 }
1254
1255 static ssize_t
1256 store_fc_rport_fast_io_fail_tmo(struct device *dev,
1257 struct device_attribute *attr, const char *buf,
1258 size_t count)
1259 {
1260 int val;
1261 char *cp;
1262 struct fc_rport *rport = transport_class_to_rport(dev);
1263
1264 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
1265 (rport->port_state == FC_PORTSTATE_DELETED) ||
1266 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
1267 return -EBUSY;
1268 if (strncmp(buf, "off", 3) == 0)
1269 rport->fast_io_fail_tmo = -1;
1270 else {
1271 val = simple_strtoul(buf, &cp, 0);
1272 if ((*cp && (*cp != '\n')) || (val < 0))
1273 return -EINVAL;
1274 /*
1275 * Cap fast_io_fail by dev_loss_tmo or
1276 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
1277 */
1278 if ((val >= rport->dev_loss_tmo) ||
1279 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
1280 return -EINVAL;
1281
1282 rport->fast_io_fail_tmo = val;
1283 }
1284 return count;
1285 }
1286 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
1287 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
1288
1289 #define fc_rport_fpin_statistic(name) \
1290 static ssize_t fc_rport_fpinstat_##name(struct device *cd, \
1291 struct device_attribute *attr, \
1292 char *buf) \
1293 { \
1294 struct fc_rport *rport = transport_class_to_rport(cd); \
1295 \
1296 return snprintf(buf, 20, "0x%llx\n", rport->fpin_stats.name); \
1297 } \
1298 static FC_DEVICE_ATTR(rport, fpin_##name, 0444, fc_rport_fpinstat_##name, NULL)
1299
1300 fc_rport_fpin_statistic(dn);
1301 fc_rport_fpin_statistic(dn_unknown);
1302 fc_rport_fpin_statistic(dn_timeout);
1303 fc_rport_fpin_statistic(dn_unable_to_route);
1304 fc_rport_fpin_statistic(dn_device_specific);
1305 fc_rport_fpin_statistic(cn);
1306 fc_rport_fpin_statistic(cn_clear);
1307 fc_rport_fpin_statistic(cn_lost_credit);
1308 fc_rport_fpin_statistic(cn_credit_stall);
1309 fc_rport_fpin_statistic(cn_oversubscription);
1310 fc_rport_fpin_statistic(cn_device_specific);
1311 fc_rport_fpin_statistic(li);
1312 fc_rport_fpin_statistic(li_failure_unknown);
1313 fc_rport_fpin_statistic(li_link_failure_count);
1314 fc_rport_fpin_statistic(li_loss_of_sync_count);
1315 fc_rport_fpin_statistic(li_loss_of_signals_count);
1316 fc_rport_fpin_statistic(li_prim_seq_err_count);
1317 fc_rport_fpin_statistic(li_invalid_tx_word_count);
1318 fc_rport_fpin_statistic(li_invalid_crc_count);
1319 fc_rport_fpin_statistic(li_device_specific);
1320
1321 static struct attribute *fc_rport_statistics_attrs[] = {
1322 &device_attr_rport_fpin_dn.attr,
1323 &device_attr_rport_fpin_dn_unknown.attr,
1324 &device_attr_rport_fpin_dn_timeout.attr,
1325 &device_attr_rport_fpin_dn_unable_to_route.attr,
1326 &device_attr_rport_fpin_dn_device_specific.attr,
1327 &device_attr_rport_fpin_li.attr,
1328 &device_attr_rport_fpin_li_failure_unknown.attr,
1329 &device_attr_rport_fpin_li_link_failure_count.attr,
1330 &device_attr_rport_fpin_li_loss_of_sync_count.attr,
1331 &device_attr_rport_fpin_li_loss_of_signals_count.attr,
1332 &device_attr_rport_fpin_li_prim_seq_err_count.attr,
1333 &device_attr_rport_fpin_li_invalid_tx_word_count.attr,
1334 &device_attr_rport_fpin_li_invalid_crc_count.attr,
1335 &device_attr_rport_fpin_li_device_specific.attr,
1336 &device_attr_rport_fpin_cn.attr,
1337 &device_attr_rport_fpin_cn_clear.attr,
1338 &device_attr_rport_fpin_cn_lost_credit.attr,
1339 &device_attr_rport_fpin_cn_credit_stall.attr,
1340 &device_attr_rport_fpin_cn_oversubscription.attr,
1341 &device_attr_rport_fpin_cn_device_specific.attr,
1342 NULL
1343 };
1344
1345 static struct attribute_group fc_rport_statistics_group = {
1346 .name = "statistics",
1347 .attrs = fc_rport_statistics_attrs,
1348 };
1349
1350
1351 /*
1352 * FC SCSI Target Attribute Management
1353 */
1354
1355 /*
1356 * Note: in the target show function we recognize when the remote
1357 * port is in the hierarchy and do not allow the driver to get
1358 * involved in sysfs functions. The driver only gets involved if
1359 * it's the "old" style that doesn't use rports.
1360 */
1361 #define fc_starget_show_function(field, format_string, sz, cast) \
1362 static ssize_t \
1363 show_fc_starget_##field (struct device *dev, \
1364 struct device_attribute *attr, char *buf) \
1365 { \
1366 struct scsi_target *starget = transport_class_to_starget(dev); \
1367 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
1368 struct fc_internal *i = to_fc_internal(shost->transportt); \
1369 struct fc_rport *rport = starget_to_rport(starget); \
1370 if (rport) \
1371 fc_starget_##field(starget) = rport->field; \
1372 else if (i->f->get_starget_##field) \
1373 i->f->get_starget_##field(starget); \
1374 return snprintf(buf, sz, format_string, \
1375 cast fc_starget_##field(starget)); \
1376 }
1377
1378 #define fc_starget_rd_attr(field, format_string, sz) \
1379 fc_starget_show_function(field, format_string, sz, ) \
1380 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1381 show_fc_starget_##field, NULL)
1382
1383 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
1384 fc_starget_show_function(field, format_string, sz, (cast)) \
1385 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
1386 show_fc_starget_##field, NULL)
1387
1388 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
1389 i->private_starget_attrs[count] = device_attr_starget_##field; \
1390 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1391 i->private_starget_attrs[count].store = NULL; \
1392 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1393 if (i->f->show_starget_##field) \
1394 count++
1395
1396 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
1397 i->private_starget_attrs[count] = device_attr_starget_##field; \
1398 if (!i->f->set_starget_##field) { \
1399 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1400 i->private_starget_attrs[count].store = NULL; \
1401 } \
1402 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1403 if (i->f->show_starget_##field) \
1404 count++
1405
1406 /* The FC Transport SCSI Target Attributes: */
1407 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1408 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1409 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1410
1411
1412 /*
1413 * FC Virtual Port Attribute Management
1414 */
1415
1416 #define fc_vport_show_function(field, format_string, sz, cast) \
1417 static ssize_t \
1418 show_fc_vport_##field (struct device *dev, \
1419 struct device_attribute *attr, char *buf) \
1420 { \
1421 struct fc_vport *vport = transport_class_to_vport(dev); \
1422 struct Scsi_Host *shost = vport_to_shost(vport); \
1423 struct fc_internal *i = to_fc_internal(shost->transportt); \
1424 if ((i->f->get_vport_##field) && \
1425 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1426 i->f->get_vport_##field(vport); \
1427 return snprintf(buf, sz, format_string, cast vport->field); \
1428 }
1429
1430 #define fc_vport_store_function(field) \
1431 static ssize_t \
1432 store_fc_vport_##field(struct device *dev, \
1433 struct device_attribute *attr, \
1434 const char *buf, size_t count) \
1435 { \
1436 int val; \
1437 struct fc_vport *vport = transport_class_to_vport(dev); \
1438 struct Scsi_Host *shost = vport_to_shost(vport); \
1439 struct fc_internal *i = to_fc_internal(shost->transportt); \
1440 char *cp; \
1441 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1442 return -EBUSY; \
1443 val = simple_strtoul(buf, &cp, 0); \
1444 if (*cp && (*cp != '\n')) \
1445 return -EINVAL; \
1446 i->f->set_vport_##field(vport, val); \
1447 return count; \
1448 }
1449
1450 #define fc_vport_store_str_function(field, slen) \
1451 static ssize_t \
1452 store_fc_vport_##field(struct device *dev, \
1453 struct device_attribute *attr, \
1454 const char *buf, size_t count) \
1455 { \
1456 struct fc_vport *vport = transport_class_to_vport(dev); \
1457 struct Scsi_Host *shost = vport_to_shost(vport); \
1458 struct fc_internal *i = to_fc_internal(shost->transportt); \
1459 unsigned int cnt=count; \
1460 \
1461 /* count may include a LF at end of string */ \
1462 if (buf[cnt-1] == '\n') \
1463 cnt--; \
1464 if (cnt > ((slen) - 1)) \
1465 return -EINVAL; \
1466 memcpy(vport->field, buf, cnt); \
1467 i->f->set_vport_##field(vport); \
1468 return count; \
1469 }
1470
1471 #define fc_vport_rd_attr(field, format_string, sz) \
1472 fc_vport_show_function(field, format_string, sz, ) \
1473 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1474 show_fc_vport_##field, NULL)
1475
1476 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1477 fc_vport_show_function(field, format_string, sz, (cast)) \
1478 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1479 show_fc_vport_##field, NULL)
1480
1481 #define fc_vport_rw_attr(field, format_string, sz) \
1482 fc_vport_show_function(field, format_string, sz, ) \
1483 fc_vport_store_function(field) \
1484 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1485 show_fc_vport_##field, \
1486 store_fc_vport_##field)
1487
1488 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1489 static ssize_t \
1490 show_fc_vport_##field (struct device *dev, \
1491 struct device_attribute *attr, char *buf) \
1492 { \
1493 struct fc_vport *vport = transport_class_to_vport(dev); \
1494 return snprintf(buf, sz, format_string, cast vport->field); \
1495 }
1496
1497 #define fc_private_vport_store_u32_function(field) \
1498 static ssize_t \
1499 store_fc_vport_##field(struct device *dev, \
1500 struct device_attribute *attr, \
1501 const char *buf, size_t count) \
1502 { \
1503 u32 val; \
1504 struct fc_vport *vport = transport_class_to_vport(dev); \
1505 char *cp; \
1506 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1507 return -EBUSY; \
1508 val = simple_strtoul(buf, &cp, 0); \
1509 if (*cp && (*cp != '\n')) \
1510 return -EINVAL; \
1511 vport->field = val; \
1512 return count; \
1513 }
1514
1515
1516 #define fc_private_vport_rd_attr(field, format_string, sz) \
1517 fc_private_vport_show_function(field, format_string, sz, ) \
1518 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1519 show_fc_vport_##field, NULL)
1520
1521 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1522 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1523 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1524 show_fc_vport_##field, NULL)
1525
1526 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1527 fc_private_vport_show_function(field, format_string, sz, ) \
1528 fc_private_vport_store_u32_function(field) \
1529 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1530 show_fc_vport_##field, \
1531 store_fc_vport_##field)
1532
1533
1534 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1535 static ssize_t \
1536 show_fc_vport_##title (struct device *dev, \
1537 struct device_attribute *attr, \
1538 char *buf) \
1539 { \
1540 struct fc_vport *vport = transport_class_to_vport(dev); \
1541 const char *name; \
1542 name = get_fc_##title##_name(vport->title); \
1543 if (!name) \
1544 return -EINVAL; \
1545 return snprintf(buf, maxlen, "%s\n", name); \
1546 } \
1547 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1548 show_fc_vport_##title, NULL)
1549
1550
1551 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1552 i->private_vport_attrs[count] = device_attr_vport_##field; \
1553 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1554 i->private_vport_attrs[count].store = NULL; \
1555 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1556 if (i->f->get_##field) \
1557 count++
1558 /* NOTE: Above MACRO differs: checks function not show bit */
1559
1560 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1561 i->private_vport_attrs[count] = device_attr_vport_##field; \
1562 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1563 i->private_vport_attrs[count].store = NULL; \
1564 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1565 count++
1566
1567 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1568 i->private_vport_attrs[count] = device_attr_vport_##field; \
1569 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1570 if (i->f->field) \
1571 count++
1572 /* NOTE: Above MACRO differs: checks function */
1573
1574 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1575 i->private_vport_attrs[count] = device_attr_vport_##field; \
1576 if (!i->f->set_vport_##field) { \
1577 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1578 i->private_vport_attrs[count].store = NULL; \
1579 } \
1580 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1581 count++
1582 /* NOTE: Above MACRO differs: does not check show bit */
1583
1584 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1585 { \
1586 i->private_vport_attrs[count] = device_attr_vport_##field; \
1587 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1588 count++; \
1589 }
1590
1591
1592 /* The FC Transport Virtual Port Attributes: */
1593
1594 /* Fixed Virtual Port Attributes */
1595
1596 /* Dynamic Virtual Port Attributes */
1597
1598 /* Private Virtual Port Attributes */
1599
1600 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1601 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1602 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1603 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1604
1605 static ssize_t
1606 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1607 char *buf)
1608 {
1609 struct fc_vport *vport = transport_class_to_vport(dev);
1610
1611 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1612 return snprintf(buf, 20, "unknown\n");
1613 return get_fc_port_roles_names(vport->roles, buf);
1614 }
1615 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1616
1617 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1618
1619 fc_private_vport_show_function(symbolic_name, "%s\n",
1620 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1621 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1622 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1623 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1624
1625 static ssize_t
1626 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1627 const char *buf, size_t count)
1628 {
1629 struct fc_vport *vport = transport_class_to_vport(dev);
1630 struct Scsi_Host *shost = vport_to_shost(vport);
1631 unsigned long flags;
1632
1633 spin_lock_irqsave(shost->host_lock, flags);
1634 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) {
1635 spin_unlock_irqrestore(shost->host_lock, flags);
1636 return -EBUSY;
1637 }
1638 vport->flags |= FC_VPORT_DELETING;
1639 spin_unlock_irqrestore(shost->host_lock, flags);
1640
1641 fc_queue_work(shost, &vport->vport_delete_work);
1642 return count;
1643 }
1644 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1645 NULL, store_fc_vport_delete);
1646
1647
1648 /*
1649 * Enable/Disable vport
1650 * Write "1" to disable, write "0" to enable
1651 */
1652 static ssize_t
1653 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1654 const char *buf,
1655 size_t count)
1656 {
1657 struct fc_vport *vport = transport_class_to_vport(dev);
1658 struct Scsi_Host *shost = vport_to_shost(vport);
1659 struct fc_internal *i = to_fc_internal(shost->transportt);
1660 int stat;
1661
1662 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1663 return -EBUSY;
1664
1665 if (*buf == '0') {
1666 if (vport->vport_state != FC_VPORT_DISABLED)
1667 return -EALREADY;
1668 } else if (*buf == '1') {
1669 if (vport->vport_state == FC_VPORT_DISABLED)
1670 return -EALREADY;
1671 } else
1672 return -EINVAL;
1673
1674 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1675 return stat ? stat : count;
1676 }
1677 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1678 NULL, store_fc_vport_disable);
1679
1680
1681 /*
1682 * Host Attribute Management
1683 */
1684
1685 #define fc_host_show_function(field, format_string, sz, cast) \
1686 static ssize_t \
1687 show_fc_host_##field (struct device *dev, \
1688 struct device_attribute *attr, char *buf) \
1689 { \
1690 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1691 struct fc_internal *i = to_fc_internal(shost->transportt); \
1692 if (i->f->get_host_##field) \
1693 i->f->get_host_##field(shost); \
1694 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1695 }
1696
1697 #define fc_host_store_function(field) \
1698 static ssize_t \
1699 store_fc_host_##field(struct device *dev, \
1700 struct device_attribute *attr, \
1701 const char *buf, size_t count) \
1702 { \
1703 int val; \
1704 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1705 struct fc_internal *i = to_fc_internal(shost->transportt); \
1706 char *cp; \
1707 \
1708 val = simple_strtoul(buf, &cp, 0); \
1709 if (*cp && (*cp != '\n')) \
1710 return -EINVAL; \
1711 i->f->set_host_##field(shost, val); \
1712 return count; \
1713 }
1714
1715 #define fc_host_store_str_function(field, slen) \
1716 static ssize_t \
1717 store_fc_host_##field(struct device *dev, \
1718 struct device_attribute *attr, \
1719 const char *buf, size_t count) \
1720 { \
1721 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1722 struct fc_internal *i = to_fc_internal(shost->transportt); \
1723 unsigned int cnt=count; \
1724 \
1725 /* count may include a LF at end of string */ \
1726 if (buf[cnt-1] == '\n') \
1727 cnt--; \
1728 if (cnt > ((slen) - 1)) \
1729 return -EINVAL; \
1730 memcpy(fc_host_##field(shost), buf, cnt); \
1731 i->f->set_host_##field(shost); \
1732 return count; \
1733 }
1734
1735 #define fc_host_rd_attr(field, format_string, sz) \
1736 fc_host_show_function(field, format_string, sz, ) \
1737 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1738 show_fc_host_##field, NULL)
1739
1740 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1741 fc_host_show_function(field, format_string, sz, (cast)) \
1742 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1743 show_fc_host_##field, NULL)
1744
1745 #define fc_host_rw_attr(field, format_string, sz) \
1746 fc_host_show_function(field, format_string, sz, ) \
1747 fc_host_store_function(field) \
1748 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1749 show_fc_host_##field, \
1750 store_fc_host_##field)
1751
1752 #define fc_host_rd_enum_attr(title, maxlen) \
1753 static ssize_t \
1754 show_fc_host_##title (struct device *dev, \
1755 struct device_attribute *attr, char *buf) \
1756 { \
1757 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1758 struct fc_internal *i = to_fc_internal(shost->transportt); \
1759 const char *name; \
1760 if (i->f->get_host_##title) \
1761 i->f->get_host_##title(shost); \
1762 name = get_fc_##title##_name(fc_host_##title(shost)); \
1763 if (!name) \
1764 return -EINVAL; \
1765 return snprintf(buf, maxlen, "%s\n", name); \
1766 } \
1767 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1768
1769 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1770 i->private_host_attrs[count] = device_attr_host_##field; \
1771 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1772 i->private_host_attrs[count].store = NULL; \
1773 i->host_attrs[count] = &i->private_host_attrs[count]; \
1774 if (i->f->show_host_##field) \
1775 count++
1776
1777 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1778 i->private_host_attrs[count] = device_attr_host_##field; \
1779 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1780 i->private_host_attrs[count].store = NULL; \
1781 i->host_attrs[count] = &i->private_host_attrs[count]; \
1782 count++
1783
1784 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1785 i->private_host_attrs[count] = device_attr_host_##field; \
1786 if (!i->f->set_host_##field) { \
1787 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1788 i->private_host_attrs[count].store = NULL; \
1789 } \
1790 i->host_attrs[count] = &i->private_host_attrs[count]; \
1791 if (i->f->show_host_##field) \
1792 count++
1793
1794
1795 #define fc_private_host_show_function(field, format_string, sz, cast) \
1796 static ssize_t \
1797 show_fc_host_##field (struct device *dev, \
1798 struct device_attribute *attr, char *buf) \
1799 { \
1800 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1801 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1802 }
1803
1804 #define fc_private_host_rd_attr(field, format_string, sz) \
1805 fc_private_host_show_function(field, format_string, sz, ) \
1806 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1807 show_fc_host_##field, NULL)
1808
1809 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1810 fc_private_host_show_function(field, format_string, sz, (cast)) \
1811 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1812 show_fc_host_##field, NULL)
1813
1814 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1815 i->private_host_attrs[count] = device_attr_host_##field; \
1816 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1817 i->private_host_attrs[count].store = NULL; \
1818 i->host_attrs[count] = &i->private_host_attrs[count]; \
1819 count++
1820
1821 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1822 { \
1823 i->private_host_attrs[count] = device_attr_host_##field; \
1824 i->host_attrs[count] = &i->private_host_attrs[count]; \
1825 count++; \
1826 }
1827
1828
1829 /* Fixed Host Attributes */
1830
1831 static ssize_t
1832 show_fc_host_supported_classes (struct device *dev,
1833 struct device_attribute *attr, char *buf)
1834 {
1835 struct Scsi_Host *shost = transport_class_to_shost(dev);
1836
1837 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1838 return snprintf(buf, 20, "unspecified\n");
1839
1840 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1841 }
1842 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1843 show_fc_host_supported_classes, NULL);
1844
1845 static ssize_t
1846 show_fc_host_supported_fc4s (struct device *dev,
1847 struct device_attribute *attr, char *buf)
1848 {
1849 struct Scsi_Host *shost = transport_class_to_shost(dev);
1850 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1851 }
1852 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1853 show_fc_host_supported_fc4s, NULL);
1854
1855 static ssize_t
1856 show_fc_host_supported_speeds (struct device *dev,
1857 struct device_attribute *attr, char *buf)
1858 {
1859 struct Scsi_Host *shost = transport_class_to_shost(dev);
1860
1861 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1862 return snprintf(buf, 20, "unknown\n");
1863
1864 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1865 }
1866 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1867 show_fc_host_supported_speeds, NULL);
1868
1869
1870 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1871 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1872 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1873 unsigned long long);
1874 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1875 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1876 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1877 fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
1878 fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1879 fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1880 fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1881 fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1882 fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1883 fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
1884
1885
1886 /* Dynamic Host Attributes */
1887
1888 static ssize_t
1889 show_fc_host_active_fc4s (struct device *dev,
1890 struct device_attribute *attr, char *buf)
1891 {
1892 struct Scsi_Host *shost = transport_class_to_shost(dev);
1893 struct fc_internal *i = to_fc_internal(shost->transportt);
1894
1895 if (i->f->get_host_active_fc4s)
1896 i->f->get_host_active_fc4s(shost);
1897
1898 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1899 }
1900 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1901 show_fc_host_active_fc4s, NULL);
1902
1903 static ssize_t
1904 show_fc_host_speed (struct device *dev,
1905 struct device_attribute *attr, char *buf)
1906 {
1907 struct Scsi_Host *shost = transport_class_to_shost(dev);
1908 struct fc_internal *i = to_fc_internal(shost->transportt);
1909
1910 if (i->f->get_host_speed)
1911 i->f->get_host_speed(shost);
1912
1913 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1914 return snprintf(buf, 20, "unknown\n");
1915
1916 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1917 }
1918 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1919 show_fc_host_speed, NULL);
1920
1921
1922 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1923 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1924 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1925 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1926 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1927
1928 fc_private_host_show_function(system_hostname, "%s\n",
1929 FC_SYMBOLIC_NAME_SIZE + 1, )
1930 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1931 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1932 show_fc_host_system_hostname, store_fc_host_system_hostname);
1933
1934
1935 /* Private Host Attributes */
1936
1937 static ssize_t
1938 show_fc_private_host_tgtid_bind_type(struct device *dev,
1939 struct device_attribute *attr, char *buf)
1940 {
1941 struct Scsi_Host *shost = transport_class_to_shost(dev);
1942 const char *name;
1943
1944 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1945 if (!name)
1946 return -EINVAL;
1947 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1948 }
1949
1950 #define get_list_head_entry(pos, head, member) \
1951 pos = list_entry((head)->next, typeof(*pos), member)
1952
1953 static ssize_t
1954 store_fc_private_host_tgtid_bind_type(struct device *dev,
1955 struct device_attribute *attr, const char *buf, size_t count)
1956 {
1957 struct Scsi_Host *shost = transport_class_to_shost(dev);
1958 struct fc_rport *rport;
1959 enum fc_tgtid_binding_type val;
1960 unsigned long flags;
1961
1962 if (get_fc_tgtid_bind_type_match(buf, &val))
1963 return -EINVAL;
1964
1965 /* if changing bind type, purge all unused consistent bindings */
1966 if (val != fc_host_tgtid_bind_type(shost)) {
1967 spin_lock_irqsave(shost->host_lock, flags);
1968 while (!list_empty(&fc_host_rport_bindings(shost))) {
1969 get_list_head_entry(rport,
1970 &fc_host_rport_bindings(shost), peers);
1971 list_del(&rport->peers);
1972 rport->port_state = FC_PORTSTATE_DELETED;
1973 fc_queue_work(shost, &rport->rport_delete_work);
1974 }
1975 spin_unlock_irqrestore(shost->host_lock, flags);
1976 }
1977
1978 fc_host_tgtid_bind_type(shost) = val;
1979 return count;
1980 }
1981
1982 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1983 show_fc_private_host_tgtid_bind_type,
1984 store_fc_private_host_tgtid_bind_type);
1985
1986 static ssize_t
1987 store_fc_private_host_issue_lip(struct device *dev,
1988 struct device_attribute *attr, const char *buf, size_t count)
1989 {
1990 struct Scsi_Host *shost = transport_class_to_shost(dev);
1991 struct fc_internal *i = to_fc_internal(shost->transportt);
1992 int ret;
1993
1994 /* ignore any data value written to the attribute */
1995 if (i->f->issue_fc_host_lip) {
1996 ret = i->f->issue_fc_host_lip(shost);
1997 return ret ? ret: count;
1998 }
1999
2000 return -ENOENT;
2001 }
2002
2003 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
2004 store_fc_private_host_issue_lip);
2005
2006 static ssize_t
2007 store_fc_private_host_dev_loss_tmo(struct device *dev,
2008 struct device_attribute *attr,
2009 const char *buf, size_t count)
2010 {
2011 struct Scsi_Host *shost = transport_class_to_shost(dev);
2012 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2013 struct fc_rport *rport;
2014 unsigned long val, flags;
2015 int rc;
2016
2017 rc = fc_str_to_dev_loss(buf, &val);
2018 if (rc)
2019 return rc;
2020
2021 fc_host_dev_loss_tmo(shost) = val;
2022 spin_lock_irqsave(shost->host_lock, flags);
2023 list_for_each_entry(rport, &fc_host->rports, peers)
2024 fc_rport_set_dev_loss_tmo(rport, val);
2025 spin_unlock_irqrestore(shost->host_lock, flags);
2026 return count;
2027 }
2028
2029 fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
2030 static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
2031 show_fc_host_dev_loss_tmo,
2032 store_fc_private_host_dev_loss_tmo);
2033
2034 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
2035
2036 /*
2037 * Host Statistics Management
2038 */
2039
2040 /* Show a given attribute in the statistics group */
2041 static ssize_t
2042 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
2043 {
2044 struct Scsi_Host *shost = transport_class_to_shost(dev);
2045 struct fc_internal *i = to_fc_internal(shost->transportt);
2046 struct fc_host_statistics *stats;
2047 ssize_t ret = -ENOENT;
2048
2049 if (offset > sizeof(struct fc_host_statistics) ||
2050 offset % sizeof(u64) != 0)
2051 WARN_ON(1);
2052
2053 if (i->f->get_fc_host_stats) {
2054 stats = (i->f->get_fc_host_stats)(shost);
2055 if (stats)
2056 ret = snprintf(buf, 20, "0x%llx\n",
2057 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
2058 }
2059 return ret;
2060 }
2061
2062
2063 /* generate a read-only statistics attribute */
2064 #define fc_host_statistic(name) \
2065 static ssize_t show_fcstat_##name(struct device *cd, \
2066 struct device_attribute *attr, \
2067 char *buf) \
2068 { \
2069 return fc_stat_show(cd, buf, \
2070 offsetof(struct fc_host_statistics, name)); \
2071 } \
2072 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
2073
2074 fc_host_statistic(seconds_since_last_reset);
2075 fc_host_statistic(tx_frames);
2076 fc_host_statistic(tx_words);
2077 fc_host_statistic(rx_frames);
2078 fc_host_statistic(rx_words);
2079 fc_host_statistic(lip_count);
2080 fc_host_statistic(nos_count);
2081 fc_host_statistic(error_frames);
2082 fc_host_statistic(dumped_frames);
2083 fc_host_statistic(link_failure_count);
2084 fc_host_statistic(loss_of_sync_count);
2085 fc_host_statistic(loss_of_signal_count);
2086 fc_host_statistic(prim_seq_protocol_err_count);
2087 fc_host_statistic(invalid_tx_word_count);
2088 fc_host_statistic(invalid_crc_count);
2089 fc_host_statistic(fcp_input_requests);
2090 fc_host_statistic(fcp_output_requests);
2091 fc_host_statistic(fcp_control_requests);
2092 fc_host_statistic(fcp_input_megabytes);
2093 fc_host_statistic(fcp_output_megabytes);
2094 fc_host_statistic(fcp_packet_alloc_failures);
2095 fc_host_statistic(fcp_packet_aborts);
2096 fc_host_statistic(fcp_frame_alloc_failures);
2097 fc_host_statistic(fc_no_free_exch);
2098 fc_host_statistic(fc_no_free_exch_xid);
2099 fc_host_statistic(fc_xid_not_found);
2100 fc_host_statistic(fc_xid_busy);
2101 fc_host_statistic(fc_seq_not_found);
2102 fc_host_statistic(fc_non_bls_resp);
2103 fc_host_statistic(cn_sig_warn);
2104 fc_host_statistic(cn_sig_alarm);
2105
2106
2107 #define fc_host_fpin_statistic(name) \
2108 static ssize_t fc_host_fpinstat_##name(struct device *cd, \
2109 struct device_attribute *attr, \
2110 char *buf) \
2111 { \
2112 struct Scsi_Host *shost = transport_class_to_shost(cd); \
2113 struct fc_host_attrs *fc_host = shost_to_fc_host(shost); \
2114 \
2115 return snprintf(buf, 20, "0x%llx\n", fc_host->fpin_stats.name); \
2116 } \
2117 static FC_DEVICE_ATTR(host, fpin_##name, 0444, fc_host_fpinstat_##name, NULL)
2118
2119 fc_host_fpin_statistic(dn);
2120 fc_host_fpin_statistic(dn_unknown);
2121 fc_host_fpin_statistic(dn_timeout);
2122 fc_host_fpin_statistic(dn_unable_to_route);
2123 fc_host_fpin_statistic(dn_device_specific);
2124 fc_host_fpin_statistic(cn);
2125 fc_host_fpin_statistic(cn_clear);
2126 fc_host_fpin_statistic(cn_lost_credit);
2127 fc_host_fpin_statistic(cn_credit_stall);
2128 fc_host_fpin_statistic(cn_oversubscription);
2129 fc_host_fpin_statistic(cn_device_specific);
2130 fc_host_fpin_statistic(li);
2131 fc_host_fpin_statistic(li_failure_unknown);
2132 fc_host_fpin_statistic(li_link_failure_count);
2133 fc_host_fpin_statistic(li_loss_of_sync_count);
2134 fc_host_fpin_statistic(li_loss_of_signals_count);
2135 fc_host_fpin_statistic(li_prim_seq_err_count);
2136 fc_host_fpin_statistic(li_invalid_tx_word_count);
2137 fc_host_fpin_statistic(li_invalid_crc_count);
2138 fc_host_fpin_statistic(li_device_specific);
2139
2140 static ssize_t
2141 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
2142 const char *buf, size_t count)
2143 {
2144 struct Scsi_Host *shost = transport_class_to_shost(dev);
2145 struct fc_internal *i = to_fc_internal(shost->transportt);
2146
2147 /* ignore any data value written to the attribute */
2148 if (i->f->reset_fc_host_stats) {
2149 i->f->reset_fc_host_stats(shost);
2150 return count;
2151 }
2152
2153 return -ENOENT;
2154 }
2155 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
2156 fc_reset_statistics);
2157
2158 static struct attribute *fc_statistics_attrs[] = {
2159 &device_attr_host_seconds_since_last_reset.attr,
2160 &device_attr_host_tx_frames.attr,
2161 &device_attr_host_tx_words.attr,
2162 &device_attr_host_rx_frames.attr,
2163 &device_attr_host_rx_words.attr,
2164 &device_attr_host_lip_count.attr,
2165 &device_attr_host_nos_count.attr,
2166 &device_attr_host_error_frames.attr,
2167 &device_attr_host_dumped_frames.attr,
2168 &device_attr_host_link_failure_count.attr,
2169 &device_attr_host_loss_of_sync_count.attr,
2170 &device_attr_host_loss_of_signal_count.attr,
2171 &device_attr_host_prim_seq_protocol_err_count.attr,
2172 &device_attr_host_invalid_tx_word_count.attr,
2173 &device_attr_host_invalid_crc_count.attr,
2174 &device_attr_host_fcp_input_requests.attr,
2175 &device_attr_host_fcp_output_requests.attr,
2176 &device_attr_host_fcp_control_requests.attr,
2177 &device_attr_host_fcp_input_megabytes.attr,
2178 &device_attr_host_fcp_output_megabytes.attr,
2179 &device_attr_host_fcp_packet_alloc_failures.attr,
2180 &device_attr_host_fcp_packet_aborts.attr,
2181 &device_attr_host_fcp_frame_alloc_failures.attr,
2182 &device_attr_host_fc_no_free_exch.attr,
2183 &device_attr_host_fc_no_free_exch_xid.attr,
2184 &device_attr_host_fc_xid_not_found.attr,
2185 &device_attr_host_fc_xid_busy.attr,
2186 &device_attr_host_fc_seq_not_found.attr,
2187 &device_attr_host_fc_non_bls_resp.attr,
2188 &device_attr_host_cn_sig_warn.attr,
2189 &device_attr_host_cn_sig_alarm.attr,
2190 &device_attr_host_reset_statistics.attr,
2191 &device_attr_host_fpin_dn.attr,
2192 &device_attr_host_fpin_dn_unknown.attr,
2193 &device_attr_host_fpin_dn_timeout.attr,
2194 &device_attr_host_fpin_dn_unable_to_route.attr,
2195 &device_attr_host_fpin_dn_device_specific.attr,
2196 &device_attr_host_fpin_li.attr,
2197 &device_attr_host_fpin_li_failure_unknown.attr,
2198 &device_attr_host_fpin_li_link_failure_count.attr,
2199 &device_attr_host_fpin_li_loss_of_sync_count.attr,
2200 &device_attr_host_fpin_li_loss_of_signals_count.attr,
2201 &device_attr_host_fpin_li_prim_seq_err_count.attr,
2202 &device_attr_host_fpin_li_invalid_tx_word_count.attr,
2203 &device_attr_host_fpin_li_invalid_crc_count.attr,
2204 &device_attr_host_fpin_li_device_specific.attr,
2205 &device_attr_host_fpin_cn.attr,
2206 &device_attr_host_fpin_cn_clear.attr,
2207 &device_attr_host_fpin_cn_lost_credit.attr,
2208 &device_attr_host_fpin_cn_credit_stall.attr,
2209 &device_attr_host_fpin_cn_oversubscription.attr,
2210 &device_attr_host_fpin_cn_device_specific.attr,
2211 NULL
2212 };
2213
2214 static struct attribute_group fc_statistics_group = {
2215 .name = "statistics",
2216 .attrs = fc_statistics_attrs,
2217 };
2218
2219
2220 /* Host Vport Attributes */
2221
2222 static int
2223 fc_parse_wwn(const char *ns, u64 *nm)
2224 {
2225 unsigned int i, j;
2226 u8 wwn[8];
2227
2228 memset(wwn, 0, sizeof(wwn));
2229
2230 /* Validate and store the new name */
2231 for (i=0, j=0; i < 16; i++) {
2232 int value;
2233
2234 value = hex_to_bin(*ns++);
2235 if (value >= 0)
2236 j = (j << 4) | value;
2237 else
2238 return -EINVAL;
2239 if (i % 2) {
2240 wwn[i/2] = j & 0xff;
2241 j = 0;
2242 }
2243 }
2244
2245 *nm = wwn_to_u64(wwn);
2246
2247 return 0;
2248 }
2249
2250
2251 /*
2252 * "Short-cut" sysfs variable to create a new vport on a FC Host.
2253 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
2254 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
2255 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
2256 */
2257 static ssize_t
2258 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
2259 const char *buf, size_t count)
2260 {
2261 struct Scsi_Host *shost = transport_class_to_shost(dev);
2262 struct fc_vport_identifiers vid;
2263 struct fc_vport *vport;
2264 unsigned int cnt=count;
2265 int stat;
2266
2267 memset(&vid, 0, sizeof(vid));
2268
2269 /* count may include a LF at end of string */
2270 if (buf[cnt-1] == '\n')
2271 cnt--;
2272
2273 /* validate we have enough characters for WWPN */
2274 if ((cnt != (16+1+16)) || (buf[16] != ':'))
2275 return -EINVAL;
2276
2277 stat = fc_parse_wwn(&buf[0], &vid.port_name);
2278 if (stat)
2279 return stat;
2280
2281 stat = fc_parse_wwn(&buf[17], &vid.node_name);
2282 if (stat)
2283 return stat;
2284
2285 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
2286 vid.vport_type = FC_PORTTYPE_NPIV;
2287 /* vid.symbolic_name is already zero/NULL's */
2288 vid.disable = false; /* always enabled */
2289
2290 /* we only allow support on Channel 0 !!! */
2291 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
2292 return stat ? stat : count;
2293 }
2294 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
2295 store_fc_host_vport_create);
2296
2297
2298 /*
2299 * "Short-cut" sysfs variable to delete a vport on a FC Host.
2300 * Vport is identified by a string containing "<WWPN>:<WWNN>".
2301 * The WWNs are specified as hex characters, and may *not* contain
2302 * any prefixes (e.g. 0x, x, etc)
2303 */
2304 static ssize_t
2305 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
2306 const char *buf, size_t count)
2307 {
2308 struct Scsi_Host *shost = transport_class_to_shost(dev);
2309 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2310 struct fc_vport *vport;
2311 u64 wwpn, wwnn;
2312 unsigned long flags;
2313 unsigned int cnt=count;
2314 int stat, match;
2315
2316 /* count may include a LF at end of string */
2317 if (buf[cnt-1] == '\n')
2318 cnt--;
2319
2320 /* validate we have enough characters for WWPN */
2321 if ((cnt != (16+1+16)) || (buf[16] != ':'))
2322 return -EINVAL;
2323
2324 stat = fc_parse_wwn(&buf[0], &wwpn);
2325 if (stat)
2326 return stat;
2327
2328 stat = fc_parse_wwn(&buf[17], &wwnn);
2329 if (stat)
2330 return stat;
2331
2332 spin_lock_irqsave(shost->host_lock, flags);
2333 match = 0;
2334 /* we only allow support on Channel 0 !!! */
2335 list_for_each_entry(vport, &fc_host->vports, peers) {
2336 if ((vport->channel == 0) &&
2337 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
2338 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
2339 break;
2340 vport->flags |= FC_VPORT_DELETING;
2341 match = 1;
2342 break;
2343 }
2344 }
2345 spin_unlock_irqrestore(shost->host_lock, flags);
2346
2347 if (!match)
2348 return -ENODEV;
2349
2350 stat = fc_vport_terminate(vport);
2351 return stat ? stat : count;
2352 }
2353 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
2354 store_fc_host_vport_delete);
2355
2356
2357 static int fc_host_match(struct attribute_container *cont,
2358 struct device *dev)
2359 {
2360 struct Scsi_Host *shost;
2361 struct fc_internal *i;
2362
2363 if (!scsi_is_host_device(dev))
2364 return 0;
2365
2366 shost = dev_to_shost(dev);
2367 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2368 != &fc_host_class.class)
2369 return 0;
2370
2371 i = to_fc_internal(shost->transportt);
2372
2373 return &i->t.host_attrs.ac == cont;
2374 }
2375
2376 static int fc_target_match(struct attribute_container *cont,
2377 struct device *dev)
2378 {
2379 struct Scsi_Host *shost;
2380 struct fc_internal *i;
2381
2382 if (!scsi_is_target_device(dev))
2383 return 0;
2384
2385 shost = dev_to_shost(dev->parent);
2386 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2387 != &fc_host_class.class)
2388 return 0;
2389
2390 i = to_fc_internal(shost->transportt);
2391
2392 return &i->t.target_attrs.ac == cont;
2393 }
2394
2395 static void fc_rport_dev_release(struct device *dev)
2396 {
2397 struct fc_rport *rport = dev_to_rport(dev);
2398 put_device(dev->parent);
2399 kfree(rport);
2400 }
2401
2402 int scsi_is_fc_rport(const struct device *dev)
2403 {
2404 return dev->release == fc_rport_dev_release;
2405 }
2406 EXPORT_SYMBOL(scsi_is_fc_rport);
2407
2408 static int fc_rport_match(struct attribute_container *cont,
2409 struct device *dev)
2410 {
2411 struct Scsi_Host *shost;
2412 struct fc_internal *i;
2413
2414 if (!scsi_is_fc_rport(dev))
2415 return 0;
2416
2417 shost = dev_to_shost(dev->parent);
2418 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2419 != &fc_host_class.class)
2420 return 0;
2421
2422 i = to_fc_internal(shost->transportt);
2423
2424 return &i->rport_attr_cont.ac == cont;
2425 }
2426
2427
2428 static void fc_vport_dev_release(struct device *dev)
2429 {
2430 struct fc_vport *vport = dev_to_vport(dev);
2431 put_device(dev->parent); /* release kobj parent */
2432 kfree(vport);
2433 }
2434
2435 static int scsi_is_fc_vport(const struct device *dev)
2436 {
2437 return dev->release == fc_vport_dev_release;
2438 }
2439
2440 static int fc_vport_match(struct attribute_container *cont,
2441 struct device *dev)
2442 {
2443 struct fc_vport *vport;
2444 struct Scsi_Host *shost;
2445 struct fc_internal *i;
2446
2447 if (!scsi_is_fc_vport(dev))
2448 return 0;
2449 vport = dev_to_vport(dev);
2450
2451 shost = vport_to_shost(vport);
2452 if (!shost->transportt || shost->transportt->host_attrs.ac.class
2453 != &fc_host_class.class)
2454 return 0;
2455
2456 i = to_fc_internal(shost->transportt);
2457 return &i->vport_attr_cont.ac == cont;
2458 }
2459
2460
2461 /**
2462 * fc_eh_timed_out - FC Transport I/O timeout intercept handler
2463 * @scmd: The SCSI command which timed out
2464 *
2465 * This routine protects against error handlers getting invoked while a
2466 * rport is in a blocked state, typically due to a temporarily loss of
2467 * connectivity. If the error handlers are allowed to proceed, requests
2468 * to abort i/o, reset the target, etc will likely fail as there is no way
2469 * to communicate with the device to perform the requested function. These
2470 * failures may result in the midlayer taking the device offline, requiring
2471 * manual intervention to restore operation.
2472 *
2473 * This routine, called whenever an i/o times out, validates the state of
2474 * the underlying rport. If the rport is blocked, it returns
2475 * EH_RESET_TIMER, which will continue to reschedule the timeout.
2476 * Eventually, either the device will return, or devloss_tmo will fire,
2477 * and when the timeout then fires, it will be handled normally.
2478 * If the rport is not blocked, normal error handling continues.
2479 *
2480 * Notes:
2481 * This routine assumes no locks are held on entry.
2482 */
2483 enum blk_eh_timer_return
2484 fc_eh_timed_out(struct scsi_cmnd *scmd)
2485 {
2486 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
2487
2488 if (rport->port_state == FC_PORTSTATE_BLOCKED)
2489 return BLK_EH_RESET_TIMER;
2490
2491 return BLK_EH_DONE;
2492 }
2493 EXPORT_SYMBOL(fc_eh_timed_out);
2494
2495 /*
2496 * Called by fc_user_scan to locate an rport on the shost that
2497 * matches the channel and target id, and invoke scsi_scan_target()
2498 * on the rport.
2499 */
2500 static void
2501 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2502 {
2503 struct fc_rport *rport;
2504 unsigned long flags;
2505
2506 spin_lock_irqsave(shost->host_lock, flags);
2507
2508 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2509 if (rport->scsi_target_id == -1)
2510 continue;
2511
2512 if (rport->port_state != FC_PORTSTATE_ONLINE)
2513 continue;
2514
2515 if ((channel == rport->channel) &&
2516 (id == rport->scsi_target_id)) {
2517 spin_unlock_irqrestore(shost->host_lock, flags);
2518 scsi_scan_target(&rport->dev, channel, id, lun,
2519 SCSI_SCAN_MANUAL);
2520 return;
2521 }
2522 }
2523
2524 spin_unlock_irqrestore(shost->host_lock, flags);
2525 }
2526
2527 /*
2528 * Called via sysfs scan routines. Necessary, as the FC transport
2529 * wants to place all target objects below the rport object. So this
2530 * routine must invoke the scsi_scan_target() routine with the rport
2531 * object as the parent.
2532 */
2533 static int
2534 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
2535 {
2536 uint chlo, chhi;
2537 uint tgtlo, tgthi;
2538
2539 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2540 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2541 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2542 return -EINVAL;
2543
2544 if (channel == SCAN_WILD_CARD) {
2545 chlo = 0;
2546 chhi = shost->max_channel + 1;
2547 } else {
2548 chlo = channel;
2549 chhi = channel + 1;
2550 }
2551
2552 if (id == SCAN_WILD_CARD) {
2553 tgtlo = 0;
2554 tgthi = shost->max_id;
2555 } else {
2556 tgtlo = id;
2557 tgthi = id + 1;
2558 }
2559
2560 for ( ; chlo < chhi; chlo++)
2561 for ( ; tgtlo < tgthi; tgtlo++)
2562 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2563
2564 return 0;
2565 }
2566
2567 struct scsi_transport_template *
2568 fc_attach_transport(struct fc_function_template *ft)
2569 {
2570 int count;
2571 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2572 GFP_KERNEL);
2573
2574 if (unlikely(!i))
2575 return NULL;
2576
2577 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2578 i->t.target_attrs.ac.class = &fc_transport_class.class;
2579 i->t.target_attrs.ac.match = fc_target_match;
2580 i->t.target_size = sizeof(struct fc_starget_attrs);
2581 transport_container_register(&i->t.target_attrs);
2582
2583 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2584 i->t.host_attrs.ac.class = &fc_host_class.class;
2585 i->t.host_attrs.ac.match = fc_host_match;
2586 i->t.host_size = sizeof(struct fc_host_attrs);
2587 if (ft->get_fc_host_stats)
2588 i->t.host_attrs.statistics = &fc_statistics_group;
2589 transport_container_register(&i->t.host_attrs);
2590
2591 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2592 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2593 i->rport_attr_cont.ac.match = fc_rport_match;
2594 i->rport_attr_cont.statistics = &fc_rport_statistics_group;
2595 transport_container_register(&i->rport_attr_cont);
2596
2597 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2598 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2599 i->vport_attr_cont.ac.match = fc_vport_match;
2600 transport_container_register(&i->vport_attr_cont);
2601
2602 i->f = ft;
2603
2604 /* Transport uses the shost workq for scsi scanning */
2605 i->t.create_work_queue = 1;
2606
2607 i->t.user_scan = fc_user_scan;
2608
2609 /*
2610 * Setup SCSI Target Attributes.
2611 */
2612 count = 0;
2613 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2614 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2615 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2616
2617 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2618
2619 i->starget_attrs[count] = NULL;
2620
2621
2622 /*
2623 * Setup SCSI Host Attributes.
2624 */
2625 count=0;
2626 SETUP_HOST_ATTRIBUTE_RD(node_name);
2627 SETUP_HOST_ATTRIBUTE_RD(port_name);
2628 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2629 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2630 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2631 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2632 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2633 if (ft->vport_create) {
2634 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2635 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2636 }
2637 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2638 SETUP_HOST_ATTRIBUTE_RD(manufacturer);
2639 SETUP_HOST_ATTRIBUTE_RD(model);
2640 SETUP_HOST_ATTRIBUTE_RD(model_description);
2641 SETUP_HOST_ATTRIBUTE_RD(hardware_version);
2642 SETUP_HOST_ATTRIBUTE_RD(driver_version);
2643 SETUP_HOST_ATTRIBUTE_RD(firmware_version);
2644 SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
2645
2646 SETUP_HOST_ATTRIBUTE_RD(port_id);
2647 SETUP_HOST_ATTRIBUTE_RD(port_type);
2648 SETUP_HOST_ATTRIBUTE_RD(port_state);
2649 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2650 SETUP_HOST_ATTRIBUTE_RD(speed);
2651 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2652 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2653 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2654
2655 /* Transport-managed attributes */
2656 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
2657 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2658 if (ft->issue_fc_host_lip)
2659 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2660 if (ft->vport_create)
2661 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2662 if (ft->vport_delete)
2663 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2664
2665 BUG_ON(count > FC_HOST_NUM_ATTRS);
2666
2667 i->host_attrs[count] = NULL;
2668
2669 /*
2670 * Setup Remote Port Attributes.
2671 */
2672 count=0;
2673 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2674 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2675 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2676 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2677 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2678 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2679 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2680 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2681 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2682 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2683
2684 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2685
2686 i->rport_attrs[count] = NULL;
2687
2688 /*
2689 * Setup Virtual Port Attributes.
2690 */
2691 count=0;
2692 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2693 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2694 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2695 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2696 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2697 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2698 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2699 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2700 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2701
2702 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2703
2704 i->vport_attrs[count] = NULL;
2705
2706 return &i->t;
2707 }
2708 EXPORT_SYMBOL(fc_attach_transport);
2709
2710 void fc_release_transport(struct scsi_transport_template *t)
2711 {
2712 struct fc_internal *i = to_fc_internal(t);
2713
2714 transport_container_unregister(&i->t.target_attrs);
2715 transport_container_unregister(&i->t.host_attrs);
2716 transport_container_unregister(&i->rport_attr_cont);
2717 transport_container_unregister(&i->vport_attr_cont);
2718
2719 kfree(i);
2720 }
2721 EXPORT_SYMBOL(fc_release_transport);
2722
2723 /**
2724 * fc_queue_work - Queue work to the fc_host workqueue.
2725 * @shost: Pointer to Scsi_Host bound to fc_host.
2726 * @work: Work to queue for execution.
2727 *
2728 * Return value:
2729 * 1 - work queued for execution
2730 * 0 - work is already queued
2731 * -EINVAL - work queue doesn't exist
2732 */
2733 static int
2734 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2735 {
2736 if (unlikely(!fc_host_work_q(shost))) {
2737 printk(KERN_ERR
2738 "ERROR: FC host '%s' attempted to queue work, "
2739 "when no workqueue created.\n", shost->hostt->name);
2740 dump_stack();
2741
2742 return -EINVAL;
2743 }
2744
2745 return queue_work(fc_host_work_q(shost), work);
2746 }
2747
2748 /**
2749 * fc_flush_work - Flush a fc_host's workqueue.
2750 * @shost: Pointer to Scsi_Host bound to fc_host.
2751 */
2752 static void
2753 fc_flush_work(struct Scsi_Host *shost)
2754 {
2755 if (!fc_host_work_q(shost)) {
2756 printk(KERN_ERR
2757 "ERROR: FC host '%s' attempted to flush work, "
2758 "when no workqueue created.\n", shost->hostt->name);
2759 dump_stack();
2760 return;
2761 }
2762
2763 flush_workqueue(fc_host_work_q(shost));
2764 }
2765
2766 /**
2767 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2768 * @shost: Pointer to Scsi_Host bound to fc_host.
2769 * @work: Work to queue for execution.
2770 * @delay: jiffies to delay the work queuing
2771 *
2772 * Return value:
2773 * 1 on success / 0 already queued / < 0 for error
2774 */
2775 static int
2776 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2777 unsigned long delay)
2778 {
2779 if (unlikely(!fc_host_devloss_work_q(shost))) {
2780 printk(KERN_ERR
2781 "ERROR: FC host '%s' attempted to queue work, "
2782 "when no workqueue created.\n", shost->hostt->name);
2783 dump_stack();
2784
2785 return -EINVAL;
2786 }
2787
2788 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2789 }
2790
2791 /**
2792 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2793 * @shost: Pointer to Scsi_Host bound to fc_host.
2794 */
2795 static void
2796 fc_flush_devloss(struct Scsi_Host *shost)
2797 {
2798 if (!fc_host_devloss_work_q(shost)) {
2799 printk(KERN_ERR
2800 "ERROR: FC host '%s' attempted to flush work, "
2801 "when no workqueue created.\n", shost->hostt->name);
2802 dump_stack();
2803 return;
2804 }
2805
2806 flush_workqueue(fc_host_devloss_work_q(shost));
2807 }
2808
2809
2810 /**
2811 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2812 * @shost: Which &Scsi_Host
2813 *
2814 * This routine is expected to be called immediately preceding the
2815 * a driver's call to scsi_remove_host().
2816 *
2817 * WARNING: A driver utilizing the fc_transport, which fails to call
2818 * this routine prior to scsi_remove_host(), will leave dangling
2819 * objects in /sys/class/fc_remote_ports. Access to any of these
2820 * objects can result in a system crash !!!
2821 *
2822 * Notes:
2823 * This routine assumes no locks are held on entry.
2824 */
2825 void
2826 fc_remove_host(struct Scsi_Host *shost)
2827 {
2828 struct fc_vport *vport = NULL, *next_vport = NULL;
2829 struct fc_rport *rport = NULL, *next_rport = NULL;
2830 struct workqueue_struct *work_q;
2831 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2832 unsigned long flags;
2833
2834 spin_lock_irqsave(shost->host_lock, flags);
2835
2836 /* Remove any vports */
2837 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2838 vport->flags |= FC_VPORT_DELETING;
2839 fc_queue_work(shost, &vport->vport_delete_work);
2840 }
2841
2842 /* Remove any remote ports */
2843 list_for_each_entry_safe(rport, next_rport,
2844 &fc_host->rports, peers) {
2845 list_del(&rport->peers);
2846 rport->port_state = FC_PORTSTATE_DELETED;
2847 fc_queue_work(shost, &rport->rport_delete_work);
2848 }
2849
2850 list_for_each_entry_safe(rport, next_rport,
2851 &fc_host->rport_bindings, peers) {
2852 list_del(&rport->peers);
2853 rport->port_state = FC_PORTSTATE_DELETED;
2854 fc_queue_work(shost, &rport->rport_delete_work);
2855 }
2856
2857 spin_unlock_irqrestore(shost->host_lock, flags);
2858
2859 /* flush all scan work items */
2860 scsi_flush_work(shost);
2861
2862 /* flush all stgt delete, and rport delete work items, then kill it */
2863 if (fc_host->work_q) {
2864 work_q = fc_host->work_q;
2865 fc_host->work_q = NULL;
2866 destroy_workqueue(work_q);
2867 }
2868
2869 /* flush all devloss work items, then kill it */
2870 if (fc_host->devloss_work_q) {
2871 work_q = fc_host->devloss_work_q;
2872 fc_host->devloss_work_q = NULL;
2873 destroy_workqueue(work_q);
2874 }
2875 }
2876 EXPORT_SYMBOL(fc_remove_host);
2877
2878 static void fc_terminate_rport_io(struct fc_rport *rport)
2879 {
2880 struct Scsi_Host *shost = rport_to_shost(rport);
2881 struct fc_internal *i = to_fc_internal(shost->transportt);
2882
2883 /* Involve the LLDD if possible to terminate all io on the rport. */
2884 if (i->f->terminate_rport_io)
2885 i->f->terminate_rport_io(rport);
2886
2887 /*
2888 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
2889 */
2890 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
2891 }
2892
2893 /**
2894 * fc_starget_delete - called to delete the scsi descendants of an rport
2895 * @work: remote port to be operated on.
2896 *
2897 * Deletes target and all sdevs.
2898 */
2899 static void
2900 fc_starget_delete(struct work_struct *work)
2901 {
2902 struct fc_rport *rport =
2903 container_of(work, struct fc_rport, stgt_delete_work);
2904
2905 fc_terminate_rport_io(rport);
2906 scsi_remove_target(&rport->dev);
2907 }
2908
2909
2910 /**
2911 * fc_rport_final_delete - finish rport termination and delete it.
2912 * @work: remote port to be deleted.
2913 */
2914 static void
2915 fc_rport_final_delete(struct work_struct *work)
2916 {
2917 struct fc_rport *rport =
2918 container_of(work, struct fc_rport, rport_delete_work);
2919 struct device *dev = &rport->dev;
2920 struct Scsi_Host *shost = rport_to_shost(rport);
2921 struct fc_internal *i = to_fc_internal(shost->transportt);
2922 unsigned long flags;
2923 int do_callback = 0;
2924
2925 fc_terminate_rport_io(rport);
2926
2927 /*
2928 * if a scan is pending, flush the SCSI Host work_q so that
2929 * that we can reclaim the rport scan work element.
2930 */
2931 if (rport->flags & FC_RPORT_SCAN_PENDING)
2932 scsi_flush_work(shost);
2933
2934 /*
2935 * Cancel any outstanding timers. These should really exist
2936 * only when rmmod'ing the LLDD and we're asking for
2937 * immediate termination of the rports
2938 */
2939 spin_lock_irqsave(shost->host_lock, flags);
2940 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2941 spin_unlock_irqrestore(shost->host_lock, flags);
2942 if (!cancel_delayed_work(&rport->fail_io_work))
2943 fc_flush_devloss(shost);
2944 if (!cancel_delayed_work(&rport->dev_loss_work))
2945 fc_flush_devloss(shost);
2946 cancel_work_sync(&rport->scan_work);
2947 spin_lock_irqsave(shost->host_lock, flags);
2948 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2949 }
2950 spin_unlock_irqrestore(shost->host_lock, flags);
2951
2952 /* Delete SCSI target and sdevs */
2953 if (rport->scsi_target_id != -1)
2954 fc_starget_delete(&rport->stgt_delete_work);
2955
2956 /*
2957 * Notify the driver that the rport is now dead. The LLDD will
2958 * also guarantee that any communication to the rport is terminated
2959 *
2960 * Avoid this call if we already called it when we preserved the
2961 * rport for the binding.
2962 */
2963 spin_lock_irqsave(shost->host_lock, flags);
2964 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2965 (i->f->dev_loss_tmo_callbk)) {
2966 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2967 do_callback = 1;
2968 }
2969 spin_unlock_irqrestore(shost->host_lock, flags);
2970
2971 if (do_callback)
2972 i->f->dev_loss_tmo_callbk(rport);
2973
2974 fc_bsg_remove(rport->rqst_q);
2975
2976 transport_remove_device(dev);
2977 device_del(dev);
2978 transport_destroy_device(dev);
2979 scsi_host_put(shost); /* for fc_host->rport list */
2980 put_device(dev); /* for self-reference */
2981 }
2982
2983
2984 /**
2985 * fc_remote_port_create - allocates and creates a remote FC port.
2986 * @shost: scsi host the remote port is connected to.
2987 * @channel: Channel on shost port connected to.
2988 * @ids: The world wide names, fc address, and FC4 port
2989 * roles for the remote port.
2990 *
2991 * Allocates and creates the remoter port structure, including the
2992 * class and sysfs creation.
2993 *
2994 * Notes:
2995 * This routine assumes no locks are held on entry.
2996 */
2997 static struct fc_rport *
2998 fc_remote_port_create(struct Scsi_Host *shost, int channel,
2999 struct fc_rport_identifiers *ids)
3000 {
3001 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3002 struct fc_internal *fci = to_fc_internal(shost->transportt);
3003 struct fc_rport *rport;
3004 struct device *dev;
3005 unsigned long flags;
3006 int error;
3007 size_t size;
3008
3009 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
3010 rport = kzalloc(size, GFP_KERNEL);
3011 if (unlikely(!rport)) {
3012 printk(KERN_ERR "%s: allocation failure\n", __func__);
3013 return NULL;
3014 }
3015
3016 rport->maxframe_size = -1;
3017 rport->supported_classes = FC_COS_UNSPECIFIED;
3018 rport->dev_loss_tmo = fc_host->dev_loss_tmo;
3019 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
3020 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
3021 rport->port_id = ids->port_id;
3022 rport->roles = ids->roles;
3023 rport->port_state = FC_PORTSTATE_ONLINE;
3024 if (fci->f->dd_fcrport_size)
3025 rport->dd_data = &rport[1];
3026 rport->channel = channel;
3027 rport->fast_io_fail_tmo = -1;
3028
3029 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
3030 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
3031 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
3032 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
3033 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
3034
3035 spin_lock_irqsave(shost->host_lock, flags);
3036
3037 rport->number = fc_host->next_rport_number++;
3038 if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
3039 (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
3040 rport->scsi_target_id = fc_host->next_target_id++;
3041 else
3042 rport->scsi_target_id = -1;
3043 list_add_tail(&rport->peers, &fc_host->rports);
3044 scsi_host_get(shost); /* for fc_host->rport list */
3045
3046 spin_unlock_irqrestore(shost->host_lock, flags);
3047
3048 dev = &rport->dev;
3049 device_initialize(dev); /* takes self reference */
3050 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
3051 dev->release = fc_rport_dev_release;
3052 dev_set_name(dev, "rport-%d:%d-%d",
3053 shost->host_no, channel, rport->number);
3054 transport_setup_device(dev);
3055
3056 error = device_add(dev);
3057 if (error) {
3058 printk(KERN_ERR "FC Remote Port device_add failed\n");
3059 goto delete_rport;
3060 }
3061 transport_add_device(dev);
3062 transport_configure_device(dev);
3063
3064 fc_bsg_rportadd(shost, rport);
3065 /* ignore any bsg add error - we just can't do sgio */
3066
3067 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
3068 /* initiate a scan of the target */
3069 rport->flags |= FC_RPORT_SCAN_PENDING;
3070 scsi_queue_work(shost, &rport->scan_work);
3071 }
3072
3073 return rport;
3074
3075 delete_rport:
3076 transport_destroy_device(dev);
3077 spin_lock_irqsave(shost->host_lock, flags);
3078 list_del(&rport->peers);
3079 scsi_host_put(shost); /* for fc_host->rport list */
3080 spin_unlock_irqrestore(shost->host_lock, flags);
3081 put_device(dev->parent);
3082 kfree(rport);
3083 return NULL;
3084 }
3085
3086 /**
3087 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
3088 * @shost: scsi host the remote port is connected to.
3089 * @channel: Channel on shost port connected to.
3090 * @ids: The world wide names, fc address, and FC4 port
3091 * roles for the remote port.
3092 *
3093 * The LLDD calls this routine to notify the transport of the existence
3094 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
3095 * of the port, it's FC address (port_id), and the FC4 roles that are
3096 * active for the port.
3097 *
3098 * For ports that are FCP targets (aka scsi targets), the FC transport
3099 * maintains consistent target id bindings on behalf of the LLDD.
3100 * A consistent target id binding is an assignment of a target id to
3101 * a remote port identifier, which persists while the scsi host is
3102 * attached. The remote port can disappear, then later reappear, and
3103 * it's target id assignment remains the same. This allows for shifts
3104 * in FC addressing (if binding by wwpn or wwnn) with no apparent
3105 * changes to the scsi subsystem which is based on scsi host number and
3106 * target id values. Bindings are only valid during the attachment of
3107 * the scsi host. If the host detaches, then later re-attaches, target
3108 * id bindings may change.
3109 *
3110 * This routine is responsible for returning a remote port structure.
3111 * The routine will search the list of remote ports it maintains
3112 * internally on behalf of consistent target id mappings. If found, the
3113 * remote port structure will be reused. Otherwise, a new remote port
3114 * structure will be allocated.
3115 *
3116 * Whenever a remote port is allocated, a new fc_remote_port class
3117 * device is created.
3118 *
3119 * Should not be called from interrupt context.
3120 *
3121 * Notes:
3122 * This routine assumes no locks are held on entry.
3123 */
3124 struct fc_rport *
3125 fc_remote_port_add(struct Scsi_Host *shost, int channel,
3126 struct fc_rport_identifiers *ids)
3127 {
3128 struct fc_internal *fci = to_fc_internal(shost->transportt);
3129 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3130 struct fc_rport *rport;
3131 unsigned long flags;
3132 int match = 0;
3133
3134 /* ensure any stgt delete functions are done */
3135 fc_flush_work(shost);
3136
3137 /*
3138 * Search the list of "active" rports, for an rport that has been
3139 * deleted, but we've held off the real delete while the target
3140 * is in a "blocked" state.
3141 */
3142 spin_lock_irqsave(shost->host_lock, flags);
3143
3144 list_for_each_entry(rport, &fc_host->rports, peers) {
3145
3146 if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
3147 rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
3148 (rport->channel == channel)) {
3149
3150 switch (fc_host->tgtid_bind_type) {
3151 case FC_TGTID_BIND_BY_WWPN:
3152 case FC_TGTID_BIND_NONE:
3153 if (rport->port_name == ids->port_name)
3154 match = 1;
3155 break;
3156 case FC_TGTID_BIND_BY_WWNN:
3157 if (rport->node_name == ids->node_name)
3158 match = 1;
3159 break;
3160 case FC_TGTID_BIND_BY_ID:
3161 if (rport->port_id == ids->port_id)
3162 match = 1;
3163 break;
3164 }
3165
3166 if (match) {
3167
3168 memcpy(&rport->node_name, &ids->node_name,
3169 sizeof(rport->node_name));
3170 memcpy(&rport->port_name, &ids->port_name,
3171 sizeof(rport->port_name));
3172 rport->port_id = ids->port_id;
3173
3174 rport->port_state = FC_PORTSTATE_ONLINE;
3175 rport->roles = ids->roles;
3176
3177 spin_unlock_irqrestore(shost->host_lock, flags);
3178
3179 if (fci->f->dd_fcrport_size)
3180 memset(rport->dd_data, 0,
3181 fci->f->dd_fcrport_size);
3182
3183 /*
3184 * If we were not a target, cancel the
3185 * io terminate and rport timers, and
3186 * we're done.
3187 *
3188 * If we were a target, but our new role
3189 * doesn't indicate a target, leave the
3190 * timers running expecting the role to
3191 * change as the target fully logs in. If
3192 * it doesn't, the target will be torn down.
3193 *
3194 * If we were a target, and our role shows
3195 * we're still a target, cancel the timers
3196 * and kick off a scan.
3197 */
3198
3199 /* was a target, not in roles */
3200 if ((rport->scsi_target_id != -1) &&
3201 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
3202 return rport;
3203
3204 /*
3205 * Stop the fail io and dev_loss timers.
3206 * If they flush, the port_state will
3207 * be checked and will NOOP the function.
3208 */
3209 if (!cancel_delayed_work(&rport->fail_io_work))
3210 fc_flush_devloss(shost);
3211 if (!cancel_delayed_work(&rport->dev_loss_work))
3212 fc_flush_devloss(shost);
3213
3214 spin_lock_irqsave(shost->host_lock, flags);
3215
3216 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3217 FC_RPORT_DEVLOSS_PENDING |
3218 FC_RPORT_DEVLOSS_CALLBK_DONE);
3219
3220 spin_unlock_irqrestore(shost->host_lock, flags);
3221
3222 /* if target, initiate a scan */
3223 if (rport->scsi_target_id != -1) {
3224 scsi_target_unblock(&rport->dev,
3225 SDEV_RUNNING);
3226 spin_lock_irqsave(shost->host_lock,
3227 flags);
3228 rport->flags |= FC_RPORT_SCAN_PENDING;
3229 scsi_queue_work(shost,
3230 &rport->scan_work);
3231 spin_unlock_irqrestore(shost->host_lock,
3232 flags);
3233 }
3234
3235 fc_bsg_goose_queue(rport);
3236
3237 return rport;
3238 }
3239 }
3240 }
3241
3242 /*
3243 * Search the bindings array
3244 * Note: if never a FCP target, you won't be on this list
3245 */
3246 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
3247
3248 /* search for a matching consistent binding */
3249
3250 list_for_each_entry(rport, &fc_host->rport_bindings,
3251 peers) {
3252 if (rport->channel != channel)
3253 continue;
3254
3255 switch (fc_host->tgtid_bind_type) {
3256 case FC_TGTID_BIND_BY_WWPN:
3257 if (rport->port_name == ids->port_name)
3258 match = 1;
3259 break;
3260 case FC_TGTID_BIND_BY_WWNN:
3261 if (rport->node_name == ids->node_name)
3262 match = 1;
3263 break;
3264 case FC_TGTID_BIND_BY_ID:
3265 if (rport->port_id == ids->port_id)
3266 match = 1;
3267 break;
3268 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3269 break;
3270 }
3271
3272 if (match) {
3273 list_move_tail(&rport->peers, &fc_host->rports);
3274 break;
3275 }
3276 }
3277
3278 if (match) {
3279 memcpy(&rport->node_name, &ids->node_name,
3280 sizeof(rport->node_name));
3281 memcpy(&rport->port_name, &ids->port_name,
3282 sizeof(rport->port_name));
3283 rport->port_id = ids->port_id;
3284 rport->port_state = FC_PORTSTATE_ONLINE;
3285 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3286
3287 if (fci->f->dd_fcrport_size)
3288 memset(rport->dd_data, 0,
3289 fci->f->dd_fcrport_size);
3290 spin_unlock_irqrestore(shost->host_lock, flags);
3291
3292 fc_remote_port_rolechg(rport, ids->roles);
3293 return rport;
3294 }
3295 }
3296
3297 spin_unlock_irqrestore(shost->host_lock, flags);
3298
3299 /* No consistent binding found - create new remote port entry */
3300 rport = fc_remote_port_create(shost, channel, ids);
3301
3302 return rport;
3303 }
3304 EXPORT_SYMBOL(fc_remote_port_add);
3305
3306
3307 /**
3308 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
3309 * @rport: The remote port that no longer exists
3310 *
3311 * The LLDD calls this routine to notify the transport that a remote
3312 * port is no longer part of the topology. Note: Although a port
3313 * may no longer be part of the topology, it may persist in the remote
3314 * ports displayed by the fc_host. We do this under 2 conditions:
3315 *
3316 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
3317 * This allows the port to temporarily disappear, then reappear without
3318 * disrupting the SCSI device tree attached to it. During the "blocked"
3319 * period the port will still exist.
3320 *
3321 * 2) If the port was a scsi target and disappears for longer than we
3322 * expect, we'll delete the port and the tear down the SCSI device tree
3323 * attached to it. However, we want to semi-persist the target id assigned
3324 * to that port if it eventually does exist. The port structure will
3325 * remain (although with minimal information) so that the target id
3326 * bindings also remain.
3327 *
3328 * If the remote port is not an FCP Target, it will be fully torn down
3329 * and deallocated, including the fc_remote_port class device.
3330 *
3331 * If the remote port is an FCP Target, the port will be placed in a
3332 * temporary blocked state. From the LLDD's perspective, the rport no
3333 * longer exists. From the SCSI midlayer's perspective, the SCSI target
3334 * exists, but all sdevs on it are blocked from further I/O. The following
3335 * is then expected.
3336 *
3337 * If the remote port does not return (signaled by a LLDD call to
3338 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
3339 * scsi target is removed - killing all outstanding i/o and removing the
3340 * scsi devices attached to it. The port structure will be marked Not
3341 * Present and be partially cleared, leaving only enough information to
3342 * recognize the remote port relative to the scsi target id binding if
3343 * it later appears. The port will remain as long as there is a valid
3344 * binding (e.g. until the user changes the binding type or unloads the
3345 * scsi host with the binding).
3346 *
3347 * If the remote port returns within the dev_loss_tmo value (and matches
3348 * according to the target id binding type), the port structure will be
3349 * reused. If it is no longer a SCSI target, the target will be torn
3350 * down. If it continues to be a SCSI target, then the target will be
3351 * unblocked (allowing i/o to be resumed), and a scan will be activated
3352 * to ensure that all luns are detected.
3353 *
3354 * Called from normal process context only - cannot be called from interrupt.
3355 *
3356 * Notes:
3357 * This routine assumes no locks are held on entry.
3358 */
3359 void
3360 fc_remote_port_delete(struct fc_rport *rport)
3361 {
3362 struct Scsi_Host *shost = rport_to_shost(rport);
3363 unsigned long timeout = rport->dev_loss_tmo;
3364 unsigned long flags;
3365
3366 /*
3367 * No need to flush the fc_host work_q's, as all adds are synchronous.
3368 *
3369 * We do need to reclaim the rport scan work element, so eventually
3370 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
3371 * there's still a scan pending.
3372 */
3373
3374 spin_lock_irqsave(shost->host_lock, flags);
3375
3376 if (rport->port_state != FC_PORTSTATE_ONLINE) {
3377 spin_unlock_irqrestore(shost->host_lock, flags);
3378 return;
3379 }
3380
3381 /*
3382 * In the past, we if this was not an FCP-Target, we would
3383 * unconditionally just jump to deleting the rport.
3384 * However, rports can be used as node containers by the LLDD,
3385 * and its not appropriate to just terminate the rport at the
3386 * first sign of a loss in connectivity. The LLDD may want to
3387 * send ELS traffic to re-validate the login. If the rport is
3388 * immediately deleted, it makes it inappropriate for a node
3389 * container.
3390 * So... we now unconditionally wait dev_loss_tmo before
3391 * destroying an rport.
3392 */
3393
3394 rport->port_state = FC_PORTSTATE_BLOCKED;
3395
3396 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
3397
3398 spin_unlock_irqrestore(shost->host_lock, flags);
3399
3400 scsi_target_block(&rport->dev);
3401
3402 /* see if we need to kill io faster than waiting for device loss */
3403 if ((rport->fast_io_fail_tmo != -1) &&
3404 (rport->fast_io_fail_tmo < timeout))
3405 fc_queue_devloss_work(shost, &rport->fail_io_work,
3406 rport->fast_io_fail_tmo * HZ);
3407
3408 /* cap the length the devices can be blocked until they are deleted */
3409 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
3410 }
3411 EXPORT_SYMBOL(fc_remote_port_delete);
3412
3413 /**
3414 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
3415 * @rport: The remote port that changed.
3416 * @roles: New roles for this port.
3417 *
3418 * Description: The LLDD calls this routine to notify the transport that the
3419 * roles on a remote port may have changed. The largest effect of this is
3420 * if a port now becomes a FCP Target, it must be allocated a
3421 * scsi target id. If the port is no longer a FCP target, any
3422 * scsi target id value assigned to it will persist in case the
3423 * role changes back to include FCP Target. No changes in the scsi
3424 * midlayer will be invoked if the role changes (in the expectation
3425 * that the role will be resumed. If it doesn't normal error processing
3426 * will take place).
3427 *
3428 * Should not be called from interrupt context.
3429 *
3430 * Notes:
3431 * This routine assumes no locks are held on entry.
3432 */
3433 void
3434 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
3435 {
3436 struct Scsi_Host *shost = rport_to_shost(rport);
3437 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3438 unsigned long flags;
3439 int create = 0;
3440
3441 spin_lock_irqsave(shost->host_lock, flags);
3442 if (roles & FC_PORT_ROLE_FCP_TARGET) {
3443 if (rport->scsi_target_id == -1) {
3444 rport->scsi_target_id = fc_host->next_target_id++;
3445 create = 1;
3446 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
3447 create = 1;
3448 }
3449
3450 rport->roles = roles;
3451
3452 spin_unlock_irqrestore(shost->host_lock, flags);
3453
3454 if (create) {
3455 /*
3456 * There may have been a delete timer running on the
3457 * port. Ensure that it is cancelled as we now know
3458 * the port is an FCP Target.
3459 * Note: we know the rport exists and is in an online
3460 * state as the LLDD would not have had an rport
3461 * reference to pass us.
3462 *
3463 * Take no action on the del_timer failure as the state
3464 * machine state change will validate the
3465 * transaction.
3466 */
3467 if (!cancel_delayed_work(&rport->fail_io_work))
3468 fc_flush_devloss(shost);
3469 if (!cancel_delayed_work(&rport->dev_loss_work))
3470 fc_flush_devloss(shost);
3471
3472 spin_lock_irqsave(shost->host_lock, flags);
3473 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
3474 FC_RPORT_DEVLOSS_PENDING |
3475 FC_RPORT_DEVLOSS_CALLBK_DONE);
3476 spin_unlock_irqrestore(shost->host_lock, flags);
3477
3478 /* ensure any stgt delete functions are done */
3479 fc_flush_work(shost);
3480
3481 scsi_target_unblock(&rport->dev, SDEV_RUNNING);
3482 /* initiate a scan of the target */
3483 spin_lock_irqsave(shost->host_lock, flags);
3484 rport->flags |= FC_RPORT_SCAN_PENDING;
3485 scsi_queue_work(shost, &rport->scan_work);
3486 spin_unlock_irqrestore(shost->host_lock, flags);
3487 }
3488 }
3489 EXPORT_SYMBOL(fc_remote_port_rolechg);
3490
3491 /**
3492 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3493 * @work: rport target that failed to reappear in the allotted time.
3494 *
3495 * Description: An attempt to delete a remote port blocks, and if it fails
3496 * to return in the allotted time this gets called.
3497 */
3498 static void
3499 fc_timeout_deleted_rport(struct work_struct *work)
3500 {
3501 struct fc_rport *rport =
3502 container_of(work, struct fc_rport, dev_loss_work.work);
3503 struct Scsi_Host *shost = rport_to_shost(rport);
3504 struct fc_internal *i = to_fc_internal(shost->transportt);
3505 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3506 unsigned long flags;
3507 int do_callback = 0;
3508
3509 spin_lock_irqsave(shost->host_lock, flags);
3510
3511 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3512
3513 /*
3514 * If the port is ONLINE, then it came back. If it was a SCSI
3515 * target, validate it still is. If not, tear down the
3516 * scsi_target on it.
3517 */
3518 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3519 (rport->scsi_target_id != -1) &&
3520 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3521 dev_printk(KERN_ERR, &rport->dev,
3522 "blocked FC remote port time out: no longer"
3523 " a FCP target, removing starget\n");
3524 spin_unlock_irqrestore(shost->host_lock, flags);
3525 scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
3526 fc_queue_work(shost, &rport->stgt_delete_work);
3527 return;
3528 }
3529
3530 /* NOOP state - we're flushing workq's */
3531 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3532 spin_unlock_irqrestore(shost->host_lock, flags);
3533 dev_printk(KERN_ERR, &rport->dev,
3534 "blocked FC remote port time out: leaving"
3535 " rport%s alone\n",
3536 (rport->scsi_target_id != -1) ? " and starget" : "");
3537 return;
3538 }
3539
3540 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3541 (rport->scsi_target_id == -1)) {
3542 list_del(&rport->peers);
3543 rport->port_state = FC_PORTSTATE_DELETED;
3544 dev_printk(KERN_ERR, &rport->dev,
3545 "blocked FC remote port time out: removing"
3546 " rport%s\n",
3547 (rport->scsi_target_id != -1) ? " and starget" : "");
3548 fc_queue_work(shost, &rport->rport_delete_work);
3549 spin_unlock_irqrestore(shost->host_lock, flags);
3550 return;
3551 }
3552
3553 dev_printk(KERN_ERR, &rport->dev,
3554 "blocked FC remote port time out: removing target and "
3555 "saving binding\n");
3556
3557 list_move_tail(&rport->peers, &fc_host->rport_bindings);
3558
3559 /*
3560 * Note: We do not remove or clear the hostdata area. This allows
3561 * host-specific target data to persist along with the
3562 * scsi_target_id. It's up to the host to manage it's hostdata area.
3563 */
3564
3565 /*
3566 * Reinitialize port attributes that may change if the port comes back.
3567 */
3568 rport->maxframe_size = -1;
3569 rport->supported_classes = FC_COS_UNSPECIFIED;
3570 rport->roles = FC_PORT_ROLE_UNKNOWN;
3571 rport->port_state = FC_PORTSTATE_NOTPRESENT;
3572 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3573
3574 /*
3575 * Pre-emptively kill I/O rather than waiting for the work queue
3576 * item to teardown the starget. (FCOE libFC folks prefer this
3577 * and to have the rport_port_id still set when it's done).
3578 */
3579 spin_unlock_irqrestore(shost->host_lock, flags);
3580 fc_terminate_rport_io(rport);
3581
3582 spin_lock_irqsave(shost->host_lock, flags);
3583
3584 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3585
3586 /* remove the identifiers that aren't used in the consisting binding */
3587 switch (fc_host->tgtid_bind_type) {
3588 case FC_TGTID_BIND_BY_WWPN:
3589 rport->node_name = -1;
3590 rport->port_id = -1;
3591 break;
3592 case FC_TGTID_BIND_BY_WWNN:
3593 rport->port_name = -1;
3594 rport->port_id = -1;
3595 break;
3596 case FC_TGTID_BIND_BY_ID:
3597 rport->node_name = -1;
3598 rport->port_name = -1;
3599 break;
3600 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3601 break;
3602 }
3603
3604 /*
3605 * As this only occurs if the remote port (scsi target)
3606 * went away and didn't come back - we'll remove
3607 * all attached scsi devices.
3608 */
3609 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3610 fc_queue_work(shost, &rport->stgt_delete_work);
3611
3612 do_callback = 1;
3613 }
3614
3615 spin_unlock_irqrestore(shost->host_lock, flags);
3616
3617 /*
3618 * Notify the driver that the rport is now dead. The LLDD will
3619 * also guarantee that any communication to the rport is terminated
3620 *
3621 * Note: we set the CALLBK_DONE flag above to correspond
3622 */
3623 if (do_callback && i->f->dev_loss_tmo_callbk)
3624 i->f->dev_loss_tmo_callbk(rport);
3625 }
3626
3627
3628 /**
3629 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3630 * @work: rport to terminate io on.
3631 *
3632 * Notes: Only requests the failure of the io, not that all are flushed
3633 * prior to returning.
3634 */
3635 static void
3636 fc_timeout_fail_rport_io(struct work_struct *work)
3637 {
3638 struct fc_rport *rport =
3639 container_of(work, struct fc_rport, fail_io_work.work);
3640
3641 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3642 return;
3643
3644 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3645 fc_terminate_rport_io(rport);
3646 }
3647
3648 /**
3649 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3650 * @work: remote port to be scanned.
3651 */
3652 static void
3653 fc_scsi_scan_rport(struct work_struct *work)
3654 {
3655 struct fc_rport *rport =
3656 container_of(work, struct fc_rport, scan_work);
3657 struct Scsi_Host *shost = rport_to_shost(rport);
3658 struct fc_internal *i = to_fc_internal(shost->transportt);
3659 unsigned long flags;
3660
3661 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3662 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3663 !(i->f->disable_target_scan)) {
3664 scsi_scan_target(&rport->dev, rport->channel,
3665 rport->scsi_target_id, SCAN_WILD_CARD,
3666 SCSI_SCAN_RESCAN);
3667 }
3668
3669 spin_lock_irqsave(shost->host_lock, flags);
3670 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3671 spin_unlock_irqrestore(shost->host_lock, flags);
3672 }
3673
3674 /**
3675 * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
3676 * @rport: Remote port that scsi_eh is trying to recover.
3677 *
3678 * This routine can be called from a FC LLD scsi_eh callback. It
3679 * blocks the scsi_eh thread until the fc_rport leaves the
3680 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3681 * necessary to avoid the scsi_eh failing recovery actions for blocked
3682 * rports which would lead to offlined SCSI devices.
3683 *
3684 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3685 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3686 * passed back to scsi_eh.
3687 */
3688 int fc_block_rport(struct fc_rport *rport)
3689 {
3690 struct Scsi_Host *shost = rport_to_shost(rport);
3691 unsigned long flags;
3692
3693 spin_lock_irqsave(shost->host_lock, flags);
3694 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3695 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3696 spin_unlock_irqrestore(shost->host_lock, flags);
3697 msleep(1000);
3698 spin_lock_irqsave(shost->host_lock, flags);
3699 }
3700 spin_unlock_irqrestore(shost->host_lock, flags);
3701
3702 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3703 return FAST_IO_FAIL;
3704
3705 return 0;
3706 }
3707 EXPORT_SYMBOL(fc_block_rport);
3708
3709 /**
3710 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3711 * @cmnd: SCSI command that scsi_eh is trying to recover
3712 *
3713 * This routine can be called from a FC LLD scsi_eh callback. It
3714 * blocks the scsi_eh thread until the fc_rport leaves the
3715 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3716 * necessary to avoid the scsi_eh failing recovery actions for blocked
3717 * rports which would lead to offlined SCSI devices.
3718 *
3719 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3720 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3721 * passed back to scsi_eh.
3722 */
3723 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3724 {
3725 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3726
3727 if (WARN_ON_ONCE(!rport))
3728 return FAST_IO_FAIL;
3729
3730 return fc_block_rport(rport);
3731 }
3732 EXPORT_SYMBOL(fc_block_scsi_eh);
3733
3734 /**
3735 * fc_vport_setup - allocates and creates a FC virtual port.
3736 * @shost: scsi host the virtual port is connected to.
3737 * @channel: Channel on shost port connected to.
3738 * @pdev: parent device for vport
3739 * @ids: The world wide names, FC4 port roles, etc for
3740 * the virtual port.
3741 * @ret_vport: The pointer to the created vport.
3742 *
3743 * Allocates and creates the vport structure, calls the parent host
3744 * to instantiate the vport, this completes w/ class and sysfs creation.
3745 *
3746 * Notes:
3747 * This routine assumes no locks are held on entry.
3748 */
3749 static int
3750 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3751 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3752 {
3753 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3754 struct fc_internal *fci = to_fc_internal(shost->transportt);
3755 struct fc_vport *vport;
3756 struct device *dev;
3757 unsigned long flags;
3758 size_t size;
3759 int error;
3760
3761 *ret_vport = NULL;
3762
3763 if ( ! fci->f->vport_create)
3764 return -ENOENT;
3765
3766 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3767 vport = kzalloc(size, GFP_KERNEL);
3768 if (unlikely(!vport)) {
3769 printk(KERN_ERR "%s: allocation failure\n", __func__);
3770 return -ENOMEM;
3771 }
3772
3773 vport->vport_state = FC_VPORT_UNKNOWN;
3774 vport->vport_last_state = FC_VPORT_UNKNOWN;
3775 vport->node_name = ids->node_name;
3776 vport->port_name = ids->port_name;
3777 vport->roles = ids->roles;
3778 vport->vport_type = ids->vport_type;
3779 if (fci->f->dd_fcvport_size)
3780 vport->dd_data = &vport[1];
3781 vport->shost = shost;
3782 vport->channel = channel;
3783 vport->flags = FC_VPORT_CREATING;
3784 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3785
3786 spin_lock_irqsave(shost->host_lock, flags);
3787
3788 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3789 spin_unlock_irqrestore(shost->host_lock, flags);
3790 kfree(vport);
3791 return -ENOSPC;
3792 }
3793 fc_host->npiv_vports_inuse++;
3794 vport->number = fc_host->next_vport_number++;
3795 list_add_tail(&vport->peers, &fc_host->vports);
3796 scsi_host_get(shost); /* for fc_host->vport list */
3797
3798 spin_unlock_irqrestore(shost->host_lock, flags);
3799
3800 dev = &vport->dev;
3801 device_initialize(dev); /* takes self reference */
3802 dev->parent = get_device(pdev); /* takes parent reference */
3803 dev->release = fc_vport_dev_release;
3804 dev_set_name(dev, "vport-%d:%d-%d",
3805 shost->host_no, channel, vport->number);
3806 transport_setup_device(dev);
3807
3808 error = device_add(dev);
3809 if (error) {
3810 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3811 goto delete_vport;
3812 }
3813 transport_add_device(dev);
3814 transport_configure_device(dev);
3815
3816 error = fci->f->vport_create(vport, ids->disable);
3817 if (error) {
3818 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3819 goto delete_vport_all;
3820 }
3821
3822 /*
3823 * if the parent isn't the physical adapter's Scsi_Host, ensure
3824 * the Scsi_Host at least contains a symlink to the vport.
3825 */
3826 if (pdev != &shost->shost_gendev) {
3827 error = sysfs_create_link(&shost->shost_gendev.kobj,
3828 &dev->kobj, dev_name(dev));
3829 if (error)
3830 printk(KERN_ERR
3831 "%s: Cannot create vport symlinks for "
3832 "%s, err=%d\n",
3833 __func__, dev_name(dev), error);
3834 }
3835 spin_lock_irqsave(shost->host_lock, flags);
3836 vport->flags &= ~FC_VPORT_CREATING;
3837 spin_unlock_irqrestore(shost->host_lock, flags);
3838
3839 dev_printk(KERN_NOTICE, pdev,
3840 "%s created via shost%d channel %d\n", dev_name(dev),
3841 shost->host_no, channel);
3842
3843 *ret_vport = vport;
3844
3845 return 0;
3846
3847 delete_vport_all:
3848 transport_remove_device(dev);
3849 device_del(dev);
3850 delete_vport:
3851 transport_destroy_device(dev);
3852 spin_lock_irqsave(shost->host_lock, flags);
3853 list_del(&vport->peers);
3854 scsi_host_put(shost); /* for fc_host->vport list */
3855 fc_host->npiv_vports_inuse--;
3856 spin_unlock_irqrestore(shost->host_lock, flags);
3857 put_device(dev->parent);
3858 kfree(vport);
3859
3860 return error;
3861 }
3862
3863 /**
3864 * fc_vport_create - Admin App or LLDD requests creation of a vport
3865 * @shost: scsi host the virtual port is connected to.
3866 * @channel: channel on shost port connected to.
3867 * @ids: The world wide names, FC4 port roles, etc for
3868 * the virtual port.
3869 *
3870 * Notes:
3871 * This routine assumes no locks are held on entry.
3872 */
3873 struct fc_vport *
3874 fc_vport_create(struct Scsi_Host *shost, int channel,
3875 struct fc_vport_identifiers *ids)
3876 {
3877 int stat;
3878 struct fc_vport *vport;
3879
3880 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3881 ids, &vport);
3882 return stat ? NULL : vport;
3883 }
3884 EXPORT_SYMBOL(fc_vport_create);
3885
3886 /**
3887 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3888 * @vport: fc_vport to be terminated
3889 *
3890 * Calls the LLDD vport_delete() function, then deallocates and removes
3891 * the vport from the shost and object tree.
3892 *
3893 * Notes:
3894 * This routine assumes no locks are held on entry.
3895 */
3896 int
3897 fc_vport_terminate(struct fc_vport *vport)
3898 {
3899 struct Scsi_Host *shost = vport_to_shost(vport);
3900 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3901 struct fc_internal *i = to_fc_internal(shost->transportt);
3902 struct device *dev = &vport->dev;
3903 unsigned long flags;
3904 int stat;
3905
3906 if (i->f->vport_delete)
3907 stat = i->f->vport_delete(vport);
3908 else
3909 stat = -ENOENT;
3910
3911 spin_lock_irqsave(shost->host_lock, flags);
3912 vport->flags &= ~FC_VPORT_DELETING;
3913 if (!stat) {
3914 vport->flags |= FC_VPORT_DELETED;
3915 list_del(&vport->peers);
3916 fc_host->npiv_vports_inuse--;
3917 scsi_host_put(shost); /* for fc_host->vport list */
3918 }
3919 spin_unlock_irqrestore(shost->host_lock, flags);
3920
3921 if (stat)
3922 return stat;
3923
3924 if (dev->parent != &shost->shost_gendev)
3925 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3926 transport_remove_device(dev);
3927 device_del(dev);
3928 transport_destroy_device(dev);
3929
3930 /*
3931 * Removing our self-reference should mean our
3932 * release function gets called, which will drop the remaining
3933 * parent reference and free the data structure.
3934 */
3935 put_device(dev); /* for self-reference */
3936
3937 return 0; /* SUCCESS */
3938 }
3939 EXPORT_SYMBOL(fc_vport_terminate);
3940
3941 /**
3942 * fc_vport_sched_delete - workq-based delete request for a vport
3943 * @work: vport to be deleted.
3944 */
3945 static void
3946 fc_vport_sched_delete(struct work_struct *work)
3947 {
3948 struct fc_vport *vport =
3949 container_of(work, struct fc_vport, vport_delete_work);
3950 int stat;
3951
3952 stat = fc_vport_terminate(vport);
3953 if (stat)
3954 dev_printk(KERN_ERR, vport->dev.parent,
3955 "%s: %s could not be deleted created via "
3956 "shost%d channel %d - error %d\n", __func__,
3957 dev_name(&vport->dev), vport->shost->host_no,
3958 vport->channel, stat);
3959 }
3960
3961
3962 /*
3963 * BSG support
3964 */
3965
3966 /**
3967 * fc_bsg_job_timeout - handler for when a bsg request timesout
3968 * @req: request that timed out
3969 */
3970 static enum blk_eh_timer_return
3971 fc_bsg_job_timeout(struct request *req)
3972 {
3973 struct bsg_job *job = blk_mq_rq_to_pdu(req);
3974 struct Scsi_Host *shost = fc_bsg_to_shost(job);
3975 struct fc_rport *rport = fc_bsg_to_rport(job);
3976 struct fc_internal *i = to_fc_internal(shost->transportt);
3977 int err = 0, inflight = 0;
3978
3979 if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
3980 return BLK_EH_RESET_TIMER;
3981
3982 inflight = bsg_job_get(job);
3983
3984 if (inflight && i->f->bsg_timeout) {
3985 /* call LLDD to abort the i/o as it has timed out */
3986 err = i->f->bsg_timeout(job);
3987 if (err == -EAGAIN) {
3988 bsg_job_put(job);
3989 return BLK_EH_RESET_TIMER;
3990 } else if (err)
3991 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3992 "abort failed with status %d\n", err);
3993 }
3994
3995 /* the blk_end_sync_io() doesn't check the error */
3996 if (inflight)
3997 blk_mq_end_request(req, BLK_STS_IOERR);
3998 return BLK_EH_DONE;
3999 }
4000
4001 /**
4002 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
4003 * @shost: scsi host rport attached to
4004 * @job: bsg job to be processed
4005 */
4006 static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
4007 {
4008 struct fc_internal *i = to_fc_internal(shost->transportt);
4009 struct fc_bsg_request *bsg_request = job->request;
4010 struct fc_bsg_reply *bsg_reply = job->reply;
4011 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
4012 int ret;
4013
4014 /* check if we really have all the request data needed */
4015 if (job->request_len < cmdlen) {
4016 ret = -ENOMSG;
4017 goto fail_host_msg;
4018 }
4019
4020 /* Validate the host command */
4021 switch (bsg_request->msgcode) {
4022 case FC_BSG_HST_ADD_RPORT:
4023 cmdlen += sizeof(struct fc_bsg_host_add_rport);
4024 break;
4025
4026 case FC_BSG_HST_DEL_RPORT:
4027 cmdlen += sizeof(struct fc_bsg_host_del_rport);
4028 break;
4029
4030 case FC_BSG_HST_ELS_NOLOGIN:
4031 cmdlen += sizeof(struct fc_bsg_host_els);
4032 /* there better be a xmt and rcv payloads */
4033 if ((!job->request_payload.payload_len) ||
4034 (!job->reply_payload.payload_len)) {
4035 ret = -EINVAL;
4036 goto fail_host_msg;
4037 }
4038 break;
4039
4040 case FC_BSG_HST_CT:
4041 cmdlen += sizeof(struct fc_bsg_host_ct);
4042 /* there better be xmt and rcv payloads */
4043 if ((!job->request_payload.payload_len) ||
4044 (!job->reply_payload.payload_len)) {
4045 ret = -EINVAL;
4046 goto fail_host_msg;
4047 }
4048 break;
4049
4050 case FC_BSG_HST_VENDOR:
4051 cmdlen += sizeof(struct fc_bsg_host_vendor);
4052 if ((shost->hostt->vendor_id == 0L) ||
4053 (bsg_request->rqst_data.h_vendor.vendor_id !=
4054 shost->hostt->vendor_id)) {
4055 ret = -ESRCH;
4056 goto fail_host_msg;
4057 }
4058 break;
4059
4060 default:
4061 ret = -EBADR;
4062 goto fail_host_msg;
4063 }
4064
4065 ret = i->f->bsg_request(job);
4066 if (!ret)
4067 return 0;
4068
4069 fail_host_msg:
4070 /* return the errno failure code as the only status */
4071 BUG_ON(job->reply_len < sizeof(uint32_t));
4072 bsg_reply->reply_payload_rcv_len = 0;
4073 bsg_reply->result = ret;
4074 job->reply_len = sizeof(uint32_t);
4075 bsg_job_done(job, bsg_reply->result,
4076 bsg_reply->reply_payload_rcv_len);
4077 return 0;
4078 }
4079
4080
4081 /*
4082 * fc_bsg_goose_queue - restart rport queue in case it was stopped
4083 * @rport: rport to be restarted
4084 */
4085 static void
4086 fc_bsg_goose_queue(struct fc_rport *rport)
4087 {
4088 struct request_queue *q = rport->rqst_q;
4089
4090 if (q)
4091 blk_mq_run_hw_queues(q, true);
4092 }
4093
4094 /**
4095 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
4096 * @shost: scsi host rport attached to
4097 * @job: bsg job to be processed
4098 */
4099 static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
4100 {
4101 struct fc_internal *i = to_fc_internal(shost->transportt);
4102 struct fc_bsg_request *bsg_request = job->request;
4103 struct fc_bsg_reply *bsg_reply = job->reply;
4104 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
4105 int ret;
4106
4107 /* check if we really have all the request data needed */
4108 if (job->request_len < cmdlen) {
4109 ret = -ENOMSG;
4110 goto fail_rport_msg;
4111 }
4112
4113 /* Validate the rport command */
4114 switch (bsg_request->msgcode) {
4115 case FC_BSG_RPT_ELS:
4116 cmdlen += sizeof(struct fc_bsg_rport_els);
4117 goto check_bidi;
4118
4119 case FC_BSG_RPT_CT:
4120 cmdlen += sizeof(struct fc_bsg_rport_ct);
4121 check_bidi:
4122 /* there better be xmt and rcv payloads */
4123 if ((!job->request_payload.payload_len) ||
4124 (!job->reply_payload.payload_len)) {
4125 ret = -EINVAL;
4126 goto fail_rport_msg;
4127 }
4128 break;
4129 default:
4130 ret = -EBADR;
4131 goto fail_rport_msg;
4132 }
4133
4134 ret = i->f->bsg_request(job);
4135 if (!ret)
4136 return 0;
4137
4138 fail_rport_msg:
4139 /* return the errno failure code as the only status */
4140 BUG_ON(job->reply_len < sizeof(uint32_t));
4141 bsg_reply->reply_payload_rcv_len = 0;
4142 bsg_reply->result = ret;
4143 job->reply_len = sizeof(uint32_t);
4144 bsg_job_done(job, bsg_reply->result,
4145 bsg_reply->reply_payload_rcv_len);
4146 return 0;
4147 }
4148
4149 static int fc_bsg_dispatch(struct bsg_job *job)
4150 {
4151 struct Scsi_Host *shost = fc_bsg_to_shost(job);
4152
4153 if (scsi_is_fc_rport(job->dev))
4154 return fc_bsg_rport_dispatch(shost, job);
4155 else
4156 return fc_bsg_host_dispatch(shost, job);
4157 }
4158
4159 static blk_status_t fc_bsg_rport_prep(struct fc_rport *rport)
4160 {
4161 if (rport->port_state == FC_PORTSTATE_BLOCKED &&
4162 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
4163 return BLK_STS_RESOURCE;
4164
4165 if (rport->port_state != FC_PORTSTATE_ONLINE)
4166 return BLK_STS_IOERR;
4167
4168 return BLK_STS_OK;
4169 }
4170
4171
4172 static int fc_bsg_dispatch_prep(struct bsg_job *job)
4173 {
4174 struct fc_rport *rport = fc_bsg_to_rport(job);
4175 blk_status_t ret;
4176
4177 ret = fc_bsg_rport_prep(rport);
4178 switch (ret) {
4179 case BLK_STS_OK:
4180 break;
4181 case BLK_STS_RESOURCE:
4182 return -EAGAIN;
4183 default:
4184 return -EIO;
4185 }
4186
4187 return fc_bsg_dispatch(job);
4188 }
4189
4190 /**
4191 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
4192 * @shost: shost for fc_host
4193 * @fc_host: fc_host adding the structures to
4194 */
4195 static int
4196 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
4197 {
4198 struct device *dev = &shost->shost_gendev;
4199 struct fc_internal *i = to_fc_internal(shost->transportt);
4200 struct request_queue *q;
4201 char bsg_name[20];
4202
4203 fc_host->rqst_q = NULL;
4204
4205 if (!i->f->bsg_request)
4206 return -ENOTSUPP;
4207
4208 snprintf(bsg_name, sizeof(bsg_name),
4209 "fc_host%d", shost->host_no);
4210
4211 q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, fc_bsg_job_timeout,
4212 i->f->dd_bsg_size);
4213 if (IS_ERR(q)) {
4214 dev_err(dev,
4215 "fc_host%d: bsg interface failed to initialize - setup queue\n",
4216 shost->host_no);
4217 return PTR_ERR(q);
4218 }
4219 __scsi_init_queue(shost, q);
4220 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
4221 fc_host->rqst_q = q;
4222 return 0;
4223 }
4224
4225 /**
4226 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4227 * @shost: shost that rport is attached to
4228 * @rport: rport that the bsg hooks are being attached to
4229 */
4230 static int
4231 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4232 {
4233 struct device *dev = &rport->dev;
4234 struct fc_internal *i = to_fc_internal(shost->transportt);
4235 struct request_queue *q;
4236
4237 rport->rqst_q = NULL;
4238
4239 if (!i->f->bsg_request)
4240 return -ENOTSUPP;
4241
4242 q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch_prep,
4243 fc_bsg_job_timeout, i->f->dd_bsg_size);
4244 if (IS_ERR(q)) {
4245 dev_err(dev, "failed to setup bsg queue\n");
4246 return PTR_ERR(q);
4247 }
4248 __scsi_init_queue(shost, q);
4249 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4250 rport->rqst_q = q;
4251 return 0;
4252 }
4253
4254
4255 /**
4256 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4257 * @q: the request_queue that is to be torn down.
4258 *
4259 * Notes:
4260 * Before unregistering the queue empty any requests that are blocked
4261 *
4262 *
4263 */
4264 static void
4265 fc_bsg_remove(struct request_queue *q)
4266 {
4267 bsg_remove_queue(q);
4268 }
4269
4270
4271 /* Original Author: Martin Hicks */
4272 MODULE_AUTHOR("James Smart");
4273 MODULE_DESCRIPTION("FC Transport Attributes");
4274 MODULE_LICENSE("GPL");
4275
4276 module_init(fc_transport_init);
4277 module_exit(fc_transport_exit);
Linux with added FPC-III support