?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
thinkpad-acpi: drop HKEY event 0x5010
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / scsi_transport_fc.c
blob7c3264ed146de43098fd38a4d652e18d207c17c5
1 /*
2 * FiberChannel transport specific attributes exported to sysfs.
3 *
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * ========
21 *
22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
25 * Add vports, etc
26 *
27 */
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <scsi/scsi_device.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_fc.h>
34 #include <scsi/scsi_cmnd.h>
35 #include <linux/netlink.h>
36 #include <net/netlink.h>
37 #include <scsi/scsi_netlink_fc.h>
38 #include <scsi/scsi_bsg_fc.h>
39 #include "scsi_priv.h"
40 #include "scsi_transport_fc_internal.h"
41
42 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
43 static void fc_vport_sched_delete(struct work_struct *work);
44 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
45 struct device *pdev, struct fc_vport_identifiers *ids,
46 struct fc_vport **vport);
47 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
48 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
49 static void fc_bsg_remove(struct request_queue *);
50 static void fc_bsg_goose_queue(struct fc_rport *);
51
52 /*
53 * Redefine so that we can have same named attributes in the
54 * sdev/starget/host objects.
55 */
56 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
57 struct device_attribute device_attr_##_prefix##_##_name = \
58 __ATTR(_name,_mode,_show,_store)
59
60 #define fc_enum_name_search(title, table_type, table) \
61 static const char *get_fc_##title##_name(enum table_type table_key) \
62 { \
63 int i; \
64 char *name = NULL; \
65 \
66 for (i = 0; i < ARRAY_SIZE(table); i++) { \
67 if (table[i].value == table_key) { \
68 name = table[i].name; \
69 break; \
70 } \
71 } \
72 return name; \
73 }
74
75 #define fc_enum_name_match(title, table_type, table) \
76 static int get_fc_##title##_match(const char *table_key, \
77 enum table_type *value) \
78 { \
79 int i; \
80 \
81 for (i = 0; i < ARRAY_SIZE(table); i++) { \
82 if (strncmp(table_key, table[i].name, \
83 table[i].matchlen) == 0) { \
84 *value = table[i].value; \
85 return 0; /* success */ \
86 } \
87 } \
88 return 1; /* failure */ \
89 }
90
91
92 /* Convert fc_port_type values to ascii string name */
93 static struct {
94 enum fc_port_type value;
95 char *name;
96 } fc_port_type_names[] = {
97 { FC_PORTTYPE_UNKNOWN, "Unknown" },
98 { FC_PORTTYPE_OTHER, "Other" },
99 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
100 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
101 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
102 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
103 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
104 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
105 };
106 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
107 #define FC_PORTTYPE_MAX_NAMELEN 50
108
109 /* Reuse fc_port_type enum function for vport_type */
110 #define get_fc_vport_type_name get_fc_port_type_name
111
112
113 /* Convert fc_host_event_code values to ascii string name */
114 static const struct {
115 enum fc_host_event_code value;
116 char *name;
117 } fc_host_event_code_names[] = {
118 { FCH_EVT_LIP, "lip" },
119 { FCH_EVT_LINKUP, "link_up" },
120 { FCH_EVT_LINKDOWN, "link_down" },
121 { FCH_EVT_LIPRESET, "lip_reset" },
122 { FCH_EVT_RSCN, "rscn" },
123 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
124 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
125 { FCH_EVT_PORT_ONLINE, "port_online" },
126 { FCH_EVT_PORT_OFFLINE, "port_offline" },
127 { FCH_EVT_PORT_FABRIC, "port_fabric" },
128 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
129 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
130 };
131 fc_enum_name_search(host_event_code, fc_host_event_code,
132 fc_host_event_code_names)
133 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
134
135
136 /* Convert fc_port_state values to ascii string name */
137 static struct {
138 enum fc_port_state value;
139 char *name;
140 } fc_port_state_names[] = {
141 { FC_PORTSTATE_UNKNOWN, "Unknown" },
142 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
143 { FC_PORTSTATE_ONLINE, "Online" },
144 { FC_PORTSTATE_OFFLINE, "Offline" },
145 { FC_PORTSTATE_BLOCKED, "Blocked" },
146 { FC_PORTSTATE_BYPASSED, "Bypassed" },
147 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
148 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
149 { FC_PORTSTATE_ERROR, "Error" },
150 { FC_PORTSTATE_LOOPBACK, "Loopback" },
151 { FC_PORTSTATE_DELETED, "Deleted" },
152 };
153 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
154 #define FC_PORTSTATE_MAX_NAMELEN 20
155
156
157 /* Convert fc_vport_state values to ascii string name */
158 static struct {
159 enum fc_vport_state value;
160 char *name;
161 } fc_vport_state_names[] = {
162 { FC_VPORT_UNKNOWN, "Unknown" },
163 { FC_VPORT_ACTIVE, "Active" },
164 { FC_VPORT_DISABLED, "Disabled" },
165 { FC_VPORT_LINKDOWN, "Linkdown" },
166 { FC_VPORT_INITIALIZING, "Initializing" },
167 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
168 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
169 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
170 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
171 { FC_VPORT_FAILED, "VPort Failed" },
172 };
173 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
174 #define FC_VPORTSTATE_MAX_NAMELEN 24
175
176 /* Reuse fc_vport_state enum function for vport_last_state */
177 #define get_fc_vport_last_state_name get_fc_vport_state_name
178
179
180 /* Convert fc_tgtid_binding_type values to ascii string name */
181 static const struct {
182 enum fc_tgtid_binding_type value;
183 char *name;
184 int matchlen;
185 } fc_tgtid_binding_type_names[] = {
186 { FC_TGTID_BIND_NONE, "none", 4 },
187 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
188 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
189 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
190 };
191 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
192 fc_tgtid_binding_type_names)
193 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
194 fc_tgtid_binding_type_names)
195 #define FC_BINDTYPE_MAX_NAMELEN 30
196
197
198 #define fc_bitfield_name_search(title, table) \
199 static ssize_t \
200 get_fc_##title##_names(u32 table_key, char *buf) \
201 { \
202 char *prefix = ""; \
203 ssize_t len = 0; \
204 int i; \
205 \
206 for (i = 0; i < ARRAY_SIZE(table); i++) { \
207 if (table[i].value & table_key) { \
208 len += sprintf(buf + len, "%s%s", \
209 prefix, table[i].name); \
210 prefix = ", "; \
211 } \
212 } \
213 len += sprintf(buf + len, "\n"); \
214 return len; \
215 }
216
217
218 /* Convert FC_COS bit values to ascii string name */
219 static const struct {
220 u32 value;
221 char *name;
222 } fc_cos_names[] = {
223 { FC_COS_CLASS1, "Class 1" },
224 { FC_COS_CLASS2, "Class 2" },
225 { FC_COS_CLASS3, "Class 3" },
226 { FC_COS_CLASS4, "Class 4" },
227 { FC_COS_CLASS6, "Class 6" },
228 };
229 fc_bitfield_name_search(cos, fc_cos_names)
230
231
232 /* Convert FC_PORTSPEED bit values to ascii string name */
233 static const struct {
234 u32 value;
235 char *name;
236 } fc_port_speed_names[] = {
237 { FC_PORTSPEED_1GBIT, "1 Gbit" },
238 { FC_PORTSPEED_2GBIT, "2 Gbit" },
239 { FC_PORTSPEED_4GBIT, "4 Gbit" },
240 { FC_PORTSPEED_10GBIT, "10 Gbit" },
241 { FC_PORTSPEED_8GBIT, "8 Gbit" },
242 { FC_PORTSPEED_16GBIT, "16 Gbit" },
243 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
244 };
245 fc_bitfield_name_search(port_speed, fc_port_speed_names)
246
247
248 static int
249 show_fc_fc4s (char *buf, u8 *fc4_list)
250 {
251 int i, len=0;
252
253 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
254 len += sprintf(buf + len , "0x%02x ", *fc4_list);
255 len += sprintf(buf + len, "\n");
256 return len;
257 }
258
259
260 /* Convert FC_PORT_ROLE bit values to ascii string name */
261 static const struct {
262 u32 value;
263 char *name;
264 } fc_port_role_names[] = {
265 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
266 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
267 { FC_PORT_ROLE_IP_PORT, "IP Port" },
268 };
269 fc_bitfield_name_search(port_roles, fc_port_role_names)
270
271 /*
272 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
273 */
274 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
275 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
276 #define FC_FPORT_PORTID 0x00000e
277 #define FC_FABCTLR_PORTID 0x00000d
278 #define FC_DIRSRVR_PORTID 0x00000c
279 #define FC_TIMESRVR_PORTID 0x00000b
280 #define FC_MGMTSRVR_PORTID 0x00000a
281
282
283 static void fc_timeout_deleted_rport(struct work_struct *work);
284 static void fc_timeout_fail_rport_io(struct work_struct *work);
285 static void fc_scsi_scan_rport(struct work_struct *work);
286
287 /*
288 * Attribute counts pre object type...
289 * Increase these values if you add attributes
290 */
291 #define FC_STARGET_NUM_ATTRS 3
292 #define FC_RPORT_NUM_ATTRS 10
293 #define FC_VPORT_NUM_ATTRS 9
294 #define FC_HOST_NUM_ATTRS 21
295
296 struct fc_internal {
297 struct scsi_transport_template t;
298 struct fc_function_template *f;
299
300 /*
301 * For attributes : each object has :
302 * An array of the actual attributes structures
303 * An array of null-terminated pointers to the attribute
304 * structures - used for mid-layer interaction.
305 *
306 * The attribute containers for the starget and host are are
307 * part of the midlayer. As the remote port is specific to the
308 * fc transport, we must provide the attribute container.
309 */
310 struct device_attribute private_starget_attrs[
311 FC_STARGET_NUM_ATTRS];
312 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
313
314 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
315 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
316
317 struct transport_container rport_attr_cont;
318 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
319 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
320
321 struct transport_container vport_attr_cont;
322 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
323 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
324 };
325
326 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
327
328 static int fc_target_setup(struct transport_container *tc, struct device *dev,
329 struct device *cdev)
330 {
331 struct scsi_target *starget = to_scsi_target(dev);
332 struct fc_rport *rport = starget_to_rport(starget);
333
334 /*
335 * if parent is remote port, use values from remote port.
336 * Otherwise, this host uses the fc_transport, but not the
337 * remote port interface. As such, initialize to known non-values.
338 */
339 if (rport) {
340 fc_starget_node_name(starget) = rport->node_name;
341 fc_starget_port_name(starget) = rport->port_name;
342 fc_starget_port_id(starget) = rport->port_id;
343 } else {
344 fc_starget_node_name(starget) = -1;
345 fc_starget_port_name(starget) = -1;
346 fc_starget_port_id(starget) = -1;
347 }
348
349 return 0;
350 }
351
352 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
353 "fc_transport",
354 fc_target_setup,
355 NULL,
356 NULL);
357
358 static int fc_host_setup(struct transport_container *tc, struct device *dev,
359 struct device *cdev)
360 {
361 struct Scsi_Host *shost = dev_to_shost(dev);
362 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
363
364 /*
365 * Set default values easily detected by the midlayer as
366 * failure cases. The scsi lldd is responsible for initializing
367 * all transport attributes to valid values per host.
368 */
369 fc_host->node_name = -1;
370 fc_host->port_name = -1;
371 fc_host->permanent_port_name = -1;
372 fc_host->supported_classes = FC_COS_UNSPECIFIED;
373 memset(fc_host->supported_fc4s, 0,
374 sizeof(fc_host->supported_fc4s));
375 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
376 fc_host->maxframe_size = -1;
377 fc_host->max_npiv_vports = 0;
378 memset(fc_host->serial_number, 0,
379 sizeof(fc_host->serial_number));
380
381 fc_host->port_id = -1;
382 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
383 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
384 memset(fc_host->active_fc4s, 0,
385 sizeof(fc_host->active_fc4s));
386 fc_host->speed = FC_PORTSPEED_UNKNOWN;
387 fc_host->fabric_name = -1;
388 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
389 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
390
391 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
392
393 INIT_LIST_HEAD(&fc_host->rports);
394 INIT_LIST_HEAD(&fc_host->rport_bindings);
395 INIT_LIST_HEAD(&fc_host->vports);
396 fc_host->next_rport_number = 0;
397 fc_host->next_target_id = 0;
398 fc_host->next_vport_number = 0;
399 fc_host->npiv_vports_inuse = 0;
400
401 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
402 "fc_wq_%d", shost->host_no);
403 fc_host->work_q = create_singlethread_workqueue(
404 fc_host->work_q_name);
405 if (!fc_host->work_q)
406 return -ENOMEM;
407
408 snprintf(fc_host->devloss_work_q_name,
409 sizeof(fc_host->devloss_work_q_name),
410 "fc_dl_%d", shost->host_no);
411 fc_host->devloss_work_q = create_singlethread_workqueue(
412 fc_host->devloss_work_q_name);
413 if (!fc_host->devloss_work_q) {
414 destroy_workqueue(fc_host->work_q);
415 fc_host->work_q = NULL;
416 return -ENOMEM;
417 }
418
419 fc_bsg_hostadd(shost, fc_host);
420 /* ignore any bsg add error - we just can't do sgio */
421
422 return 0;
423 }
424
425 static int fc_host_remove(struct transport_container *tc, struct device *dev,
426 struct device *cdev)
427 {
428 struct Scsi_Host *shost = dev_to_shost(dev);
429 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
430
431 fc_bsg_remove(fc_host->rqst_q);
432 return 0;
433 }
434
435 static DECLARE_TRANSPORT_CLASS(fc_host_class,
436 "fc_host",
437 fc_host_setup,
438 fc_host_remove,
439 NULL);
440
441 /*
442 * Setup and Remove actions for remote ports are handled
443 * in the service functions below.
444 */
445 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
446 "fc_remote_ports",
447 NULL,
448 NULL,
449 NULL);
450
451 /*
452 * Setup and Remove actions for virtual ports are handled
453 * in the service functions below.
454 */
455 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
456 "fc_vports",
457 NULL,
458 NULL,
459 NULL);
460
461 /*
462 * Module Parameters
463 */
464
465 /*
466 * dev_loss_tmo: the default number of seconds that the FC transport
467 * should insulate the loss of a remote port.
468 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
469 */
470 static unsigned int fc_dev_loss_tmo = 60; /* seconds */
471
472 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
473 MODULE_PARM_DESC(dev_loss_tmo,
474 "Maximum number of seconds that the FC transport should"
475 " insulate the loss of a remote port. Once this value is"
476 " exceeded, the scsi target is removed. Value should be"
477 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
478
479 /*
480 * Netlink Infrastructure
481 */
482
483 static atomic_t fc_event_seq;
484
485 /**
486 * fc_get_event_number - Obtain the next sequential FC event number
487 *
488 * Notes:
489 * We could have inlined this, but it would have required fc_event_seq to
490 * be exposed. For now, live with the subroutine call.
491 * Atomic used to avoid lock/unlock...
492 */
493 u32
494 fc_get_event_number(void)
495 {
496 return atomic_add_return(1, &fc_event_seq);
497 }
498 EXPORT_SYMBOL(fc_get_event_number);
499
500
501 /**
502 * fc_host_post_event - called to post an even on an fc_host.
503 * @shost: host the event occurred on
504 * @event_number: fc event number obtained from get_fc_event_number()
505 * @event_code: fc_host event being posted
506 * @event_data: 32bits of data for the event being posted
507 *
508 * Notes:
509 * This routine assumes no locks are held on entry.
510 */
511 void
512 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
513 enum fc_host_event_code event_code, u32 event_data)
514 {
515 struct sk_buff *skb;
516 struct nlmsghdr *nlh;
517 struct fc_nl_event *event;
518 const char *name;
519 u32 len, skblen;
520 int err;
521
522 if (!scsi_nl_sock) {
523 err = -ENOENT;
524 goto send_fail;
525 }
526
527 len = FC_NL_MSGALIGN(sizeof(*event));
528 skblen = NLMSG_SPACE(len);
529
530 skb = alloc_skb(skblen, GFP_KERNEL);
531 if (!skb) {
532 err = -ENOBUFS;
533 goto send_fail;
534 }
535
536 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
537 skblen - sizeof(*nlh), 0);
538 if (!nlh) {
539 err = -ENOBUFS;
540 goto send_fail_skb;
541 }
542 event = NLMSG_DATA(nlh);
543
544 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
545 FC_NL_ASYNC_EVENT, len);
546 event->seconds = get_seconds();
547 event->vendor_id = 0;
548 event->host_no = shost->host_no;
549 event->event_datalen = sizeof(u32); /* bytes */
550 event->event_num = event_number;
551 event->event_code = event_code;
552 event->event_data = event_data;
553
554 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
555 GFP_KERNEL);
556 return;
557
558 send_fail_skb:
559 kfree_skb(skb);
560 send_fail:
561 name = get_fc_host_event_code_name(event_code);
562 printk(KERN_WARNING
563 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
564 __func__, shost->host_no,
565 (name) ? name : "<unknown>", event_data, err);
566 return;
567 }
568 EXPORT_SYMBOL(fc_host_post_event);
569
570
571 /**
572 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
573 * @shost: host the event occurred on
574 * @event_number: fc event number obtained from get_fc_event_number()
575 * @data_len: amount, in bytes, of vendor unique data
576 * @data_buf: pointer to vendor unique data
577 * @vendor_id: Vendor id
578 *
579 * Notes:
580 * This routine assumes no locks are held on entry.
581 */
582 void
583 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
584 u32 data_len, char * data_buf, u64 vendor_id)
585 {
586 struct sk_buff *skb;
587 struct nlmsghdr *nlh;
588 struct fc_nl_event *event;
589 u32 len, skblen;
590 int err;
591
592 if (!scsi_nl_sock) {
593 err = -ENOENT;
594 goto send_vendor_fail;
595 }
596
597 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
598 skblen = NLMSG_SPACE(len);
599
600 skb = alloc_skb(skblen, GFP_KERNEL);
601 if (!skb) {
602 err = -ENOBUFS;
603 goto send_vendor_fail;
604 }
605
606 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
607 skblen - sizeof(*nlh), 0);
608 if (!nlh) {
609 err = -ENOBUFS;
610 goto send_vendor_fail_skb;
611 }
612 event = NLMSG_DATA(nlh);
613
614 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
615 FC_NL_ASYNC_EVENT, len);
616 event->seconds = get_seconds();
617 event->vendor_id = vendor_id;
618 event->host_no = shost->host_no;
619 event->event_datalen = data_len; /* bytes */
620 event->event_num = event_number;
621 event->event_code = FCH_EVT_VENDOR_UNIQUE;
622 memcpy(&event->event_data, data_buf, data_len);
623
624 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
625 GFP_KERNEL);
626 return;
627
628 send_vendor_fail_skb:
629 kfree_skb(skb);
630 send_vendor_fail:
631 printk(KERN_WARNING
632 "%s: Dropped Event : host %d vendor_unique - err %d\n",
633 __func__, shost->host_no, err);
634 return;
635 }
636 EXPORT_SYMBOL(fc_host_post_vendor_event);
637
638
639
640 static __init int fc_transport_init(void)
641 {
642 int error;
643
644 atomic_set(&fc_event_seq, 0);
645
646 error = transport_class_register(&fc_host_class);
647 if (error)
648 return error;
649 error = transport_class_register(&fc_vport_class);
650 if (error)
651 goto unreg_host_class;
652 error = transport_class_register(&fc_rport_class);
653 if (error)
654 goto unreg_vport_class;
655 error = transport_class_register(&fc_transport_class);
656 if (error)
657 goto unreg_rport_class;
658 return 0;
659
660 unreg_rport_class:
661 transport_class_unregister(&fc_rport_class);
662 unreg_vport_class:
663 transport_class_unregister(&fc_vport_class);
664 unreg_host_class:
665 transport_class_unregister(&fc_host_class);
666 return error;
667 }
668
669 static void __exit fc_transport_exit(void)
670 {
671 transport_class_unregister(&fc_transport_class);
672 transport_class_unregister(&fc_rport_class);
673 transport_class_unregister(&fc_host_class);
674 transport_class_unregister(&fc_vport_class);
675 }
676
677 /*
678 * FC Remote Port Attribute Management
679 */
680
681 #define fc_rport_show_function(field, format_string, sz, cast) \
682 static ssize_t \
683 show_fc_rport_##field (struct device *dev, \
684 struct device_attribute *attr, char *buf) \
685 { \
686 struct fc_rport *rport = transport_class_to_rport(dev); \
687 struct Scsi_Host *shost = rport_to_shost(rport); \
688 struct fc_internal *i = to_fc_internal(shost->transportt); \
689 if ((i->f->get_rport_##field) && \
690 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
691 (rport->port_state == FC_PORTSTATE_DELETED) || \
692 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
693 i->f->get_rport_##field(rport); \
694 return snprintf(buf, sz, format_string, cast rport->field); \
695 }
696
697 #define fc_rport_store_function(field) \
698 static ssize_t \
699 store_fc_rport_##field(struct device *dev, \
700 struct device_attribute *attr, \
701 const char *buf, size_t count) \
702 { \
703 int val; \
704 struct fc_rport *rport = transport_class_to_rport(dev); \
705 struct Scsi_Host *shost = rport_to_shost(rport); \
706 struct fc_internal *i = to_fc_internal(shost->transportt); \
707 char *cp; \
708 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
709 (rport->port_state == FC_PORTSTATE_DELETED) || \
710 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
711 return -EBUSY; \
712 val = simple_strtoul(buf, &cp, 0); \
713 if (*cp && (*cp != '\n')) \
714 return -EINVAL; \
715 i->f->set_rport_##field(rport, val); \
716 return count; \
717 }
718
719 #define fc_rport_rd_attr(field, format_string, sz) \
720 fc_rport_show_function(field, format_string, sz, ) \
721 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
722 show_fc_rport_##field, NULL)
723
724 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
725 fc_rport_show_function(field, format_string, sz, (cast)) \
726 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
727 show_fc_rport_##field, NULL)
728
729 #define fc_rport_rw_attr(field, format_string, sz) \
730 fc_rport_show_function(field, format_string, sz, ) \
731 fc_rport_store_function(field) \
732 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
733 show_fc_rport_##field, \
734 store_fc_rport_##field)
735
736
737 #define fc_private_rport_show_function(field, format_string, sz, cast) \
738 static ssize_t \
739 show_fc_rport_##field (struct device *dev, \
740 struct device_attribute *attr, char *buf) \
741 { \
742 struct fc_rport *rport = transport_class_to_rport(dev); \
743 return snprintf(buf, sz, format_string, cast rport->field); \
744 }
745
746 #define fc_private_rport_rd_attr(field, format_string, sz) \
747 fc_private_rport_show_function(field, format_string, sz, ) \
748 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
749 show_fc_rport_##field, NULL)
750
751 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
752 fc_private_rport_show_function(field, format_string, sz, (cast)) \
753 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
754 show_fc_rport_##field, NULL)
755
756
757 #define fc_private_rport_rd_enum_attr(title, maxlen) \
758 static ssize_t \
759 show_fc_rport_##title (struct device *dev, \
760 struct device_attribute *attr, char *buf) \
761 { \
762 struct fc_rport *rport = transport_class_to_rport(dev); \
763 const char *name; \
764 name = get_fc_##title##_name(rport->title); \
765 if (!name) \
766 return -EINVAL; \
767 return snprintf(buf, maxlen, "%s\n", name); \
768 } \
769 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
770 show_fc_rport_##title, NULL)
771
772
773 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
774 i->private_rport_attrs[count] = device_attr_rport_##field; \
775 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
776 i->private_rport_attrs[count].store = NULL; \
777 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
778 if (i->f->show_rport_##field) \
779 count++
780
781 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
782 i->private_rport_attrs[count] = device_attr_rport_##field; \
783 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
784 i->private_rport_attrs[count].store = NULL; \
785 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
786 count++
787
788 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
789 i->private_rport_attrs[count] = device_attr_rport_##field; \
790 if (!i->f->set_rport_##field) { \
791 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
792 i->private_rport_attrs[count].store = NULL; \
793 } \
794 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
795 if (i->f->show_rport_##field) \
796 count++
797
798 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
799 { \
800 i->private_rport_attrs[count] = device_attr_rport_##field; \
801 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
802 count++; \
803 }
804
805
806 /* The FC Transport Remote Port Attributes: */
807
808 /* Fixed Remote Port Attributes */
809
810 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
811
812 static ssize_t
813 show_fc_rport_supported_classes (struct device *dev,
814 struct device_attribute *attr, char *buf)
815 {
816 struct fc_rport *rport = transport_class_to_rport(dev);
817 if (rport->supported_classes == FC_COS_UNSPECIFIED)
818 return snprintf(buf, 20, "unspecified\n");
819 return get_fc_cos_names(rport->supported_classes, buf);
820 }
821 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
822 show_fc_rport_supported_classes, NULL);
823
824 /* Dynamic Remote Port Attributes */
825
826 /*
827 * dev_loss_tmo attribute
828 */
829 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
830 static ssize_t
831 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
832 const char *buf, size_t count)
833 {
834 int val;
835 struct fc_rport *rport = transport_class_to_rport(dev);
836 struct Scsi_Host *shost = rport_to_shost(rport);
837 struct fc_internal *i = to_fc_internal(shost->transportt);
838 char *cp;
839 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
840 (rport->port_state == FC_PORTSTATE_DELETED) ||
841 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
842 return -EBUSY;
843 val = simple_strtoul(buf, &cp, 0);
844 if ((*cp && (*cp != '\n')) ||
845 (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
846 return -EINVAL;
847 i->f->set_rport_dev_loss_tmo(rport, val);
848 return count;
849 }
850 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
851 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
852
853
854 /* Private Remote Port Attributes */
855
856 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
857 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
858 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
859
860 static ssize_t
861 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
862 char *buf)
863 {
864 struct fc_rport *rport = transport_class_to_rport(dev);
865
866 /* identify any roles that are port_id specific */
867 if ((rport->port_id != -1) &&
868 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
869 FC_WELLKNOWN_PORTID_MASK) {
870 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
871 case FC_FPORT_PORTID:
872 return snprintf(buf, 30, "Fabric Port\n");
873 case FC_FABCTLR_PORTID:
874 return snprintf(buf, 30, "Fabric Controller\n");
875 case FC_DIRSRVR_PORTID:
876 return snprintf(buf, 30, "Directory Server\n");
877 case FC_TIMESRVR_PORTID:
878 return snprintf(buf, 30, "Time Server\n");
879 case FC_MGMTSRVR_PORTID:
880 return snprintf(buf, 30, "Management Server\n");
881 default:
882 return snprintf(buf, 30, "Unknown Fabric Entity\n");
883 }
884 } else {
885 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
886 return snprintf(buf, 20, "unknown\n");
887 return get_fc_port_roles_names(rport->roles, buf);
888 }
889 }
890 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
891 show_fc_rport_roles, NULL);
892
893 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
894 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
895
896 /*
897 * fast_io_fail_tmo attribute
898 */
899 static ssize_t
900 show_fc_rport_fast_io_fail_tmo (struct device *dev,
901 struct device_attribute *attr, char *buf)
902 {
903 struct fc_rport *rport = transport_class_to_rport(dev);
904
905 if (rport->fast_io_fail_tmo == -1)
906 return snprintf(buf, 5, "off\n");
907 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
908 }
909
910 static ssize_t
911 store_fc_rport_fast_io_fail_tmo(struct device *dev,
912 struct device_attribute *attr, const char *buf,
913 size_t count)
914 {
915 int val;
916 char *cp;
917 struct fc_rport *rport = transport_class_to_rport(dev);
918
919 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
920 (rport->port_state == FC_PORTSTATE_DELETED) ||
921 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
922 return -EBUSY;
923 if (strncmp(buf, "off", 3) == 0)
924 rport->fast_io_fail_tmo = -1;
925 else {
926 val = simple_strtoul(buf, &cp, 0);
927 if ((*cp && (*cp != '\n')) ||
928 (val < 0) || (val >= rport->dev_loss_tmo))
929 return -EINVAL;
930 rport->fast_io_fail_tmo = val;
931 }
932 return count;
933 }
934 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
935 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
936
937
938 /*
939 * FC SCSI Target Attribute Management
940 */
941
942 /*
943 * Note: in the target show function we recognize when the remote
944 * port is in the heirarchy and do not allow the driver to get
945 * involved in sysfs functions. The driver only gets involved if
946 * it's the "old" style that doesn't use rports.
947 */
948 #define fc_starget_show_function(field, format_string, sz, cast) \
949 static ssize_t \
950 show_fc_starget_##field (struct device *dev, \
951 struct device_attribute *attr, char *buf) \
952 { \
953 struct scsi_target *starget = transport_class_to_starget(dev); \
954 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
955 struct fc_internal *i = to_fc_internal(shost->transportt); \
956 struct fc_rport *rport = starget_to_rport(starget); \
957 if (rport) \
958 fc_starget_##field(starget) = rport->field; \
959 else if (i->f->get_starget_##field) \
960 i->f->get_starget_##field(starget); \
961 return snprintf(buf, sz, format_string, \
962 cast fc_starget_##field(starget)); \
963 }
964
965 #define fc_starget_rd_attr(field, format_string, sz) \
966 fc_starget_show_function(field, format_string, sz, ) \
967 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
968 show_fc_starget_##field, NULL)
969
970 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
971 fc_starget_show_function(field, format_string, sz, (cast)) \
972 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
973 show_fc_starget_##field, NULL)
974
975 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
976 i->private_starget_attrs[count] = device_attr_starget_##field; \
977 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
978 i->private_starget_attrs[count].store = NULL; \
979 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
980 if (i->f->show_starget_##field) \
981 count++
982
983 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
984 i->private_starget_attrs[count] = device_attr_starget_##field; \
985 if (!i->f->set_starget_##field) { \
986 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
987 i->private_starget_attrs[count].store = NULL; \
988 } \
989 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
990 if (i->f->show_starget_##field) \
991 count++
992
993 /* The FC Transport SCSI Target Attributes: */
994 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
995 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
996 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
997
998
999 /*
1000 * FC Virtual Port Attribute Management
1001 */
1002
1003 #define fc_vport_show_function(field, format_string, sz, cast) \
1004 static ssize_t \
1005 show_fc_vport_##field (struct device *dev, \
1006 struct device_attribute *attr, char *buf) \
1007 { \
1008 struct fc_vport *vport = transport_class_to_vport(dev); \
1009 struct Scsi_Host *shost = vport_to_shost(vport); \
1010 struct fc_internal *i = to_fc_internal(shost->transportt); \
1011 if ((i->f->get_vport_##field) && \
1012 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1013 i->f->get_vport_##field(vport); \
1014 return snprintf(buf, sz, format_string, cast vport->field); \
1015 }
1016
1017 #define fc_vport_store_function(field) \
1018 static ssize_t \
1019 store_fc_vport_##field(struct device *dev, \
1020 struct device_attribute *attr, \
1021 const char *buf, size_t count) \
1022 { \
1023 int val; \
1024 struct fc_vport *vport = transport_class_to_vport(dev); \
1025 struct Scsi_Host *shost = vport_to_shost(vport); \
1026 struct fc_internal *i = to_fc_internal(shost->transportt); \
1027 char *cp; \
1028 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1029 return -EBUSY; \
1030 val = simple_strtoul(buf, &cp, 0); \
1031 if (*cp && (*cp != '\n')) \
1032 return -EINVAL; \
1033 i->f->set_vport_##field(vport, val); \
1034 return count; \
1035 }
1036
1037 #define fc_vport_store_str_function(field, slen) \
1038 static ssize_t \
1039 store_fc_vport_##field(struct device *dev, \
1040 struct device_attribute *attr, \
1041 const char *buf, size_t count) \
1042 { \
1043 struct fc_vport *vport = transport_class_to_vport(dev); \
1044 struct Scsi_Host *shost = vport_to_shost(vport); \
1045 struct fc_internal *i = to_fc_internal(shost->transportt); \
1046 unsigned int cnt=count; \
1047 \
1048 /* count may include a LF at end of string */ \
1049 if (buf[cnt-1] == '\n') \
1050 cnt--; \
1051 if (cnt > ((slen) - 1)) \
1052 return -EINVAL; \
1053 memcpy(vport->field, buf, cnt); \
1054 i->f->set_vport_##field(vport); \
1055 return count; \
1056 }
1057
1058 #define fc_vport_rd_attr(field, format_string, sz) \
1059 fc_vport_show_function(field, format_string, sz, ) \
1060 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1061 show_fc_vport_##field, NULL)
1062
1063 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1064 fc_vport_show_function(field, format_string, sz, (cast)) \
1065 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1066 show_fc_vport_##field, NULL)
1067
1068 #define fc_vport_rw_attr(field, format_string, sz) \
1069 fc_vport_show_function(field, format_string, sz, ) \
1070 fc_vport_store_function(field) \
1071 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1072 show_fc_vport_##field, \
1073 store_fc_vport_##field)
1074
1075 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1076 static ssize_t \
1077 show_fc_vport_##field (struct device *dev, \
1078 struct device_attribute *attr, char *buf) \
1079 { \
1080 struct fc_vport *vport = transport_class_to_vport(dev); \
1081 return snprintf(buf, sz, format_string, cast vport->field); \
1082 }
1083
1084 #define fc_private_vport_store_u32_function(field) \
1085 static ssize_t \
1086 store_fc_vport_##field(struct device *dev, \
1087 struct device_attribute *attr, \
1088 const char *buf, size_t count) \
1089 { \
1090 u32 val; \
1091 struct fc_vport *vport = transport_class_to_vport(dev); \
1092 char *cp; \
1093 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1094 return -EBUSY; \
1095 val = simple_strtoul(buf, &cp, 0); \
1096 if (*cp && (*cp != '\n')) \
1097 return -EINVAL; \
1098 vport->field = val; \
1099 return count; \
1100 }
1101
1102
1103 #define fc_private_vport_rd_attr(field, format_string, sz) \
1104 fc_private_vport_show_function(field, format_string, sz, ) \
1105 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1106 show_fc_vport_##field, NULL)
1107
1108 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1109 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1110 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1111 show_fc_vport_##field, NULL)
1112
1113 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1114 fc_private_vport_show_function(field, format_string, sz, ) \
1115 fc_private_vport_store_u32_function(field) \
1116 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1117 show_fc_vport_##field, \
1118 store_fc_vport_##field)
1119
1120
1121 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1122 static ssize_t \
1123 show_fc_vport_##title (struct device *dev, \
1124 struct device_attribute *attr, \
1125 char *buf) \
1126 { \
1127 struct fc_vport *vport = transport_class_to_vport(dev); \
1128 const char *name; \
1129 name = get_fc_##title##_name(vport->title); \
1130 if (!name) \
1131 return -EINVAL; \
1132 return snprintf(buf, maxlen, "%s\n", name); \
1133 } \
1134 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1135 show_fc_vport_##title, NULL)
1136
1137
1138 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1139 i->private_vport_attrs[count] = device_attr_vport_##field; \
1140 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1141 i->private_vport_attrs[count].store = NULL; \
1142 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1143 if (i->f->get_##field) \
1144 count++
1145 /* NOTE: Above MACRO differs: checks function not show bit */
1146
1147 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1148 i->private_vport_attrs[count] = device_attr_vport_##field; \
1149 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1150 i->private_vport_attrs[count].store = NULL; \
1151 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1152 count++
1153
1154 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1155 i->private_vport_attrs[count] = device_attr_vport_##field; \
1156 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1157 if (i->f->field) \
1158 count++
1159 /* NOTE: Above MACRO differs: checks function */
1160
1161 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1162 i->private_vport_attrs[count] = device_attr_vport_##field; \
1163 if (!i->f->set_vport_##field) { \
1164 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1165 i->private_vport_attrs[count].store = NULL; \
1166 } \
1167 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1168 count++
1169 /* NOTE: Above MACRO differs: does not check show bit */
1170
1171 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1172 { \
1173 i->private_vport_attrs[count] = device_attr_vport_##field; \
1174 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1175 count++; \
1176 }
1177
1178
1179 /* The FC Transport Virtual Port Attributes: */
1180
1181 /* Fixed Virtual Port Attributes */
1182
1183 /* Dynamic Virtual Port Attributes */
1184
1185 /* Private Virtual Port Attributes */
1186
1187 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1188 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1189 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1190 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1191
1192 static ssize_t
1193 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1194 char *buf)
1195 {
1196 struct fc_vport *vport = transport_class_to_vport(dev);
1197
1198 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1199 return snprintf(buf, 20, "unknown\n");
1200 return get_fc_port_roles_names(vport->roles, buf);
1201 }
1202 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1203
1204 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1205
1206 fc_private_vport_show_function(symbolic_name, "%s\n",
1207 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1208 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1209 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1210 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1211
1212 static ssize_t
1213 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1214 const char *buf, size_t count)
1215 {
1216 struct fc_vport *vport = transport_class_to_vport(dev);
1217 struct Scsi_Host *shost = vport_to_shost(vport);
1218
1219 fc_queue_work(shost, &vport->vport_delete_work);
1220 return count;
1221 }
1222 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1223 NULL, store_fc_vport_delete);
1224
1225
1226 /*
1227 * Enable/Disable vport
1228 * Write "1" to disable, write "0" to enable
1229 */
1230 static ssize_t
1231 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1232 const char *buf,
1233 size_t count)
1234 {
1235 struct fc_vport *vport = transport_class_to_vport(dev);
1236 struct Scsi_Host *shost = vport_to_shost(vport);
1237 struct fc_internal *i = to_fc_internal(shost->transportt);
1238 int stat;
1239
1240 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1241 return -EBUSY;
1242
1243 if (*buf == '0') {
1244 if (vport->vport_state != FC_VPORT_DISABLED)
1245 return -EALREADY;
1246 } else if (*buf == '1') {
1247 if (vport->vport_state == FC_VPORT_DISABLED)
1248 return -EALREADY;
1249 } else
1250 return -EINVAL;
1251
1252 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1253 return stat ? stat : count;
1254 }
1255 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1256 NULL, store_fc_vport_disable);
1257
1258
1259 /*
1260 * Host Attribute Management
1261 */
1262
1263 #define fc_host_show_function(field, format_string, sz, cast) \
1264 static ssize_t \
1265 show_fc_host_##field (struct device *dev, \
1266 struct device_attribute *attr, char *buf) \
1267 { \
1268 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1269 struct fc_internal *i = to_fc_internal(shost->transportt); \
1270 if (i->f->get_host_##field) \
1271 i->f->get_host_##field(shost); \
1272 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1273 }
1274
1275 #define fc_host_store_function(field) \
1276 static ssize_t \
1277 store_fc_host_##field(struct device *dev, \
1278 struct device_attribute *attr, \
1279 const char *buf, size_t count) \
1280 { \
1281 int val; \
1282 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1283 struct fc_internal *i = to_fc_internal(shost->transportt); \
1284 char *cp; \
1285 \
1286 val = simple_strtoul(buf, &cp, 0); \
1287 if (*cp && (*cp != '\n')) \
1288 return -EINVAL; \
1289 i->f->set_host_##field(shost, val); \
1290 return count; \
1291 }
1292
1293 #define fc_host_store_str_function(field, slen) \
1294 static ssize_t \
1295 store_fc_host_##field(struct device *dev, \
1296 struct device_attribute *attr, \
1297 const char *buf, size_t count) \
1298 { \
1299 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1300 struct fc_internal *i = to_fc_internal(shost->transportt); \
1301 unsigned int cnt=count; \
1302 \
1303 /* count may include a LF at end of string */ \
1304 if (buf[cnt-1] == '\n') \
1305 cnt--; \
1306 if (cnt > ((slen) - 1)) \
1307 return -EINVAL; \
1308 memcpy(fc_host_##field(shost), buf, cnt); \
1309 i->f->set_host_##field(shost); \
1310 return count; \
1311 }
1312
1313 #define fc_host_rd_attr(field, format_string, sz) \
1314 fc_host_show_function(field, format_string, sz, ) \
1315 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1316 show_fc_host_##field, NULL)
1317
1318 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1319 fc_host_show_function(field, format_string, sz, (cast)) \
1320 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1321 show_fc_host_##field, NULL)
1322
1323 #define fc_host_rw_attr(field, format_string, sz) \
1324 fc_host_show_function(field, format_string, sz, ) \
1325 fc_host_store_function(field) \
1326 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1327 show_fc_host_##field, \
1328 store_fc_host_##field)
1329
1330 #define fc_host_rd_enum_attr(title, maxlen) \
1331 static ssize_t \
1332 show_fc_host_##title (struct device *dev, \
1333 struct device_attribute *attr, char *buf) \
1334 { \
1335 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1336 struct fc_internal *i = to_fc_internal(shost->transportt); \
1337 const char *name; \
1338 if (i->f->get_host_##title) \
1339 i->f->get_host_##title(shost); \
1340 name = get_fc_##title##_name(fc_host_##title(shost)); \
1341 if (!name) \
1342 return -EINVAL; \
1343 return snprintf(buf, maxlen, "%s\n", name); \
1344 } \
1345 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1346
1347 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1348 i->private_host_attrs[count] = device_attr_host_##field; \
1349 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1350 i->private_host_attrs[count].store = NULL; \
1351 i->host_attrs[count] = &i->private_host_attrs[count]; \
1352 if (i->f->show_host_##field) \
1353 count++
1354
1355 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1356 i->private_host_attrs[count] = device_attr_host_##field; \
1357 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1358 i->private_host_attrs[count].store = NULL; \
1359 i->host_attrs[count] = &i->private_host_attrs[count]; \
1360 count++
1361
1362 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1363 i->private_host_attrs[count] = device_attr_host_##field; \
1364 if (!i->f->set_host_##field) { \
1365 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1366 i->private_host_attrs[count].store = NULL; \
1367 } \
1368 i->host_attrs[count] = &i->private_host_attrs[count]; \
1369 if (i->f->show_host_##field) \
1370 count++
1371
1372
1373 #define fc_private_host_show_function(field, format_string, sz, cast) \
1374 static ssize_t \
1375 show_fc_host_##field (struct device *dev, \
1376 struct device_attribute *attr, char *buf) \
1377 { \
1378 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1379 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1380 }
1381
1382 #define fc_private_host_rd_attr(field, format_string, sz) \
1383 fc_private_host_show_function(field, format_string, sz, ) \
1384 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1385 show_fc_host_##field, NULL)
1386
1387 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1388 fc_private_host_show_function(field, format_string, sz, (cast)) \
1389 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1390 show_fc_host_##field, NULL)
1391
1392 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1393 i->private_host_attrs[count] = device_attr_host_##field; \
1394 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1395 i->private_host_attrs[count].store = NULL; \
1396 i->host_attrs[count] = &i->private_host_attrs[count]; \
1397 count++
1398
1399 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1400 { \
1401 i->private_host_attrs[count] = device_attr_host_##field; \
1402 i->host_attrs[count] = &i->private_host_attrs[count]; \
1403 count++; \
1404 }
1405
1406
1407 /* Fixed Host Attributes */
1408
1409 static ssize_t
1410 show_fc_host_supported_classes (struct device *dev,
1411 struct device_attribute *attr, char *buf)
1412 {
1413 struct Scsi_Host *shost = transport_class_to_shost(dev);
1414
1415 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1416 return snprintf(buf, 20, "unspecified\n");
1417
1418 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1419 }
1420 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1421 show_fc_host_supported_classes, NULL);
1422
1423 static ssize_t
1424 show_fc_host_supported_fc4s (struct device *dev,
1425 struct device_attribute *attr, char *buf)
1426 {
1427 struct Scsi_Host *shost = transport_class_to_shost(dev);
1428 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1429 }
1430 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1431 show_fc_host_supported_fc4s, NULL);
1432
1433 static ssize_t
1434 show_fc_host_supported_speeds (struct device *dev,
1435 struct device_attribute *attr, char *buf)
1436 {
1437 struct Scsi_Host *shost = transport_class_to_shost(dev);
1438
1439 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1440 return snprintf(buf, 20, "unknown\n");
1441
1442 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1443 }
1444 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1445 show_fc_host_supported_speeds, NULL);
1446
1447
1448 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1449 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1450 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1451 unsigned long long);
1452 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1453 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1454 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1455
1456
1457 /* Dynamic Host Attributes */
1458
1459 static ssize_t
1460 show_fc_host_active_fc4s (struct device *dev,
1461 struct device_attribute *attr, char *buf)
1462 {
1463 struct Scsi_Host *shost = transport_class_to_shost(dev);
1464 struct fc_internal *i = to_fc_internal(shost->transportt);
1465
1466 if (i->f->get_host_active_fc4s)
1467 i->f->get_host_active_fc4s(shost);
1468
1469 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1470 }
1471 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1472 show_fc_host_active_fc4s, NULL);
1473
1474 static ssize_t
1475 show_fc_host_speed (struct device *dev,
1476 struct device_attribute *attr, char *buf)
1477 {
1478 struct Scsi_Host *shost = transport_class_to_shost(dev);
1479 struct fc_internal *i = to_fc_internal(shost->transportt);
1480
1481 if (i->f->get_host_speed)
1482 i->f->get_host_speed(shost);
1483
1484 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1485 return snprintf(buf, 20, "unknown\n");
1486
1487 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1488 }
1489 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1490 show_fc_host_speed, NULL);
1491
1492
1493 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1494 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1495 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1496 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1497 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1498
1499 fc_private_host_show_function(system_hostname, "%s\n",
1500 FC_SYMBOLIC_NAME_SIZE + 1, )
1501 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1502 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1503 show_fc_host_system_hostname, store_fc_host_system_hostname);
1504
1505
1506 /* Private Host Attributes */
1507
1508 static ssize_t
1509 show_fc_private_host_tgtid_bind_type(struct device *dev,
1510 struct device_attribute *attr, char *buf)
1511 {
1512 struct Scsi_Host *shost = transport_class_to_shost(dev);
1513 const char *name;
1514
1515 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1516 if (!name)
1517 return -EINVAL;
1518 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1519 }
1520
1521 #define get_list_head_entry(pos, head, member) \
1522 pos = list_entry((head)->next, typeof(*pos), member)
1523
1524 static ssize_t
1525 store_fc_private_host_tgtid_bind_type(struct device *dev,
1526 struct device_attribute *attr, const char *buf, size_t count)
1527 {
1528 struct Scsi_Host *shost = transport_class_to_shost(dev);
1529 struct fc_rport *rport;
1530 enum fc_tgtid_binding_type val;
1531 unsigned long flags;
1532
1533 if (get_fc_tgtid_bind_type_match(buf, &val))
1534 return -EINVAL;
1535
1536 /* if changing bind type, purge all unused consistent bindings */
1537 if (val != fc_host_tgtid_bind_type(shost)) {
1538 spin_lock_irqsave(shost->host_lock, flags);
1539 while (!list_empty(&fc_host_rport_bindings(shost))) {
1540 get_list_head_entry(rport,
1541 &fc_host_rport_bindings(shost), peers);
1542 list_del(&rport->peers);
1543 rport->port_state = FC_PORTSTATE_DELETED;
1544 fc_queue_work(shost, &rport->rport_delete_work);
1545 }
1546 spin_unlock_irqrestore(shost->host_lock, flags);
1547 }
1548
1549 fc_host_tgtid_bind_type(shost) = val;
1550 return count;
1551 }
1552
1553 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1554 show_fc_private_host_tgtid_bind_type,
1555 store_fc_private_host_tgtid_bind_type);
1556
1557 static ssize_t
1558 store_fc_private_host_issue_lip(struct device *dev,
1559 struct device_attribute *attr, const char *buf, size_t count)
1560 {
1561 struct Scsi_Host *shost = transport_class_to_shost(dev);
1562 struct fc_internal *i = to_fc_internal(shost->transportt);
1563 int ret;
1564
1565 /* ignore any data value written to the attribute */
1566 if (i->f->issue_fc_host_lip) {
1567 ret = i->f->issue_fc_host_lip(shost);
1568 return ret ? ret: count;
1569 }
1570
1571 return -ENOENT;
1572 }
1573
1574 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1575 store_fc_private_host_issue_lip);
1576
1577 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1578
1579
1580 /*
1581 * Host Statistics Management
1582 */
1583
1584 /* Show a given an attribute in the statistics group */
1585 static ssize_t
1586 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1587 {
1588 struct Scsi_Host *shost = transport_class_to_shost(dev);
1589 struct fc_internal *i = to_fc_internal(shost->transportt);
1590 struct fc_host_statistics *stats;
1591 ssize_t ret = -ENOENT;
1592
1593 if (offset > sizeof(struct fc_host_statistics) ||
1594 offset % sizeof(u64) != 0)
1595 WARN_ON(1);
1596
1597 if (i->f->get_fc_host_stats) {
1598 stats = (i->f->get_fc_host_stats)(shost);
1599 if (stats)
1600 ret = snprintf(buf, 20, "0x%llx\n",
1601 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1602 }
1603 return ret;
1604 }
1605
1606
1607 /* generate a read-only statistics attribute */
1608 #define fc_host_statistic(name) \
1609 static ssize_t show_fcstat_##name(struct device *cd, \
1610 struct device_attribute *attr, \
1611 char *buf) \
1612 { \
1613 return fc_stat_show(cd, buf, \
1614 offsetof(struct fc_host_statistics, name)); \
1615 } \
1616 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1617
1618 fc_host_statistic(seconds_since_last_reset);
1619 fc_host_statistic(tx_frames);
1620 fc_host_statistic(tx_words);
1621 fc_host_statistic(rx_frames);
1622 fc_host_statistic(rx_words);
1623 fc_host_statistic(lip_count);
1624 fc_host_statistic(nos_count);
1625 fc_host_statistic(error_frames);
1626 fc_host_statistic(dumped_frames);
1627 fc_host_statistic(link_failure_count);
1628 fc_host_statistic(loss_of_sync_count);
1629 fc_host_statistic(loss_of_signal_count);
1630 fc_host_statistic(prim_seq_protocol_err_count);
1631 fc_host_statistic(invalid_tx_word_count);
1632 fc_host_statistic(invalid_crc_count);
1633 fc_host_statistic(fcp_input_requests);
1634 fc_host_statistic(fcp_output_requests);
1635 fc_host_statistic(fcp_control_requests);
1636 fc_host_statistic(fcp_input_megabytes);
1637 fc_host_statistic(fcp_output_megabytes);
1638
1639 static ssize_t
1640 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1641 const char *buf, size_t count)
1642 {
1643 struct Scsi_Host *shost = transport_class_to_shost(dev);
1644 struct fc_internal *i = to_fc_internal(shost->transportt);
1645
1646 /* ignore any data value written to the attribute */
1647 if (i->f->reset_fc_host_stats) {
1648 i->f->reset_fc_host_stats(shost);
1649 return count;
1650 }
1651
1652 return -ENOENT;
1653 }
1654 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1655 fc_reset_statistics);
1656
1657 static struct attribute *fc_statistics_attrs[] = {
1658 &device_attr_host_seconds_since_last_reset.attr,
1659 &device_attr_host_tx_frames.attr,
1660 &device_attr_host_tx_words.attr,
1661 &device_attr_host_rx_frames.attr,
1662 &device_attr_host_rx_words.attr,
1663 &device_attr_host_lip_count.attr,
1664 &device_attr_host_nos_count.attr,
1665 &device_attr_host_error_frames.attr,
1666 &device_attr_host_dumped_frames.attr,
1667 &device_attr_host_link_failure_count.attr,
1668 &device_attr_host_loss_of_sync_count.attr,
1669 &device_attr_host_loss_of_signal_count.attr,
1670 &device_attr_host_prim_seq_protocol_err_count.attr,
1671 &device_attr_host_invalid_tx_word_count.attr,
1672 &device_attr_host_invalid_crc_count.attr,
1673 &device_attr_host_fcp_input_requests.attr,
1674 &device_attr_host_fcp_output_requests.attr,
1675 &device_attr_host_fcp_control_requests.attr,
1676 &device_attr_host_fcp_input_megabytes.attr,
1677 &device_attr_host_fcp_output_megabytes.attr,
1678 &device_attr_host_reset_statistics.attr,
1679 NULL
1680 };
1681
1682 static struct attribute_group fc_statistics_group = {
1683 .name = "statistics",
1684 .attrs = fc_statistics_attrs,
1685 };
1686
1687
1688 /* Host Vport Attributes */
1689
1690 static int
1691 fc_parse_wwn(const char *ns, u64 *nm)
1692 {
1693 unsigned int i, j;
1694 u8 wwn[8];
1695
1696 memset(wwn, 0, sizeof(wwn));
1697
1698 /* Validate and store the new name */
1699 for (i=0, j=0; i < 16; i++) {
1700 if ((*ns >= 'a') && (*ns <= 'f'))
1701 j = ((j << 4) | ((*ns++ -'a') + 10));
1702 else if ((*ns >= 'A') && (*ns <= 'F'))
1703 j = ((j << 4) | ((*ns++ -'A') + 10));
1704 else if ((*ns >= '0') && (*ns <= '9'))
1705 j = ((j << 4) | (*ns++ -'0'));
1706 else
1707 return -EINVAL;
1708 if (i % 2) {
1709 wwn[i/2] = j & 0xff;
1710 j = 0;
1711 }
1712 }
1713
1714 *nm = wwn_to_u64(wwn);
1715
1716 return 0;
1717 }
1718
1719
1720 /*
1721 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1722 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1723 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1724 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1725 */
1726 static ssize_t
1727 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1728 const char *buf, size_t count)
1729 {
1730 struct Scsi_Host *shost = transport_class_to_shost(dev);
1731 struct fc_vport_identifiers vid;
1732 struct fc_vport *vport;
1733 unsigned int cnt=count;
1734 int stat;
1735
1736 memset(&vid, 0, sizeof(vid));
1737
1738 /* count may include a LF at end of string */
1739 if (buf[cnt-1] == '\n')
1740 cnt--;
1741
1742 /* validate we have enough characters for WWPN */
1743 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1744 return -EINVAL;
1745
1746 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1747 if (stat)
1748 return stat;
1749
1750 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1751 if (stat)
1752 return stat;
1753
1754 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1755 vid.vport_type = FC_PORTTYPE_NPIV;
1756 /* vid.symbolic_name is already zero/NULL's */
1757 vid.disable = false; /* always enabled */
1758
1759 /* we only allow support on Channel 0 !!! */
1760 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1761 return stat ? stat : count;
1762 }
1763 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1764 store_fc_host_vport_create);
1765
1766
1767 /*
1768 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1769 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1770 * The WWNs are specified as hex characters, and may *not* contain
1771 * any prefixes (e.g. 0x, x, etc)
1772 */
1773 static ssize_t
1774 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1775 const char *buf, size_t count)
1776 {
1777 struct Scsi_Host *shost = transport_class_to_shost(dev);
1778 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1779 struct fc_vport *vport;
1780 u64 wwpn, wwnn;
1781 unsigned long flags;
1782 unsigned int cnt=count;
1783 int stat, match;
1784
1785 /* count may include a LF at end of string */
1786 if (buf[cnt-1] == '\n')
1787 cnt--;
1788
1789 /* validate we have enough characters for WWPN */
1790 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1791 return -EINVAL;
1792
1793 stat = fc_parse_wwn(&buf[0], &wwpn);
1794 if (stat)
1795 return stat;
1796
1797 stat = fc_parse_wwn(&buf[17], &wwnn);
1798 if (stat)
1799 return stat;
1800
1801 spin_lock_irqsave(shost->host_lock, flags);
1802 match = 0;
1803 /* we only allow support on Channel 0 !!! */
1804 list_for_each_entry(vport, &fc_host->vports, peers) {
1805 if ((vport->channel == 0) &&
1806 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1807 match = 1;
1808 break;
1809 }
1810 }
1811 spin_unlock_irqrestore(shost->host_lock, flags);
1812
1813 if (!match)
1814 return -ENODEV;
1815
1816 stat = fc_vport_terminate(vport);
1817 return stat ? stat : count;
1818 }
1819 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1820 store_fc_host_vport_delete);
1821
1822
1823 static int fc_host_match(struct attribute_container *cont,
1824 struct device *dev)
1825 {
1826 struct Scsi_Host *shost;
1827 struct fc_internal *i;
1828
1829 if (!scsi_is_host_device(dev))
1830 return 0;
1831
1832 shost = dev_to_shost(dev);
1833 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1834 != &fc_host_class.class)
1835 return 0;
1836
1837 i = to_fc_internal(shost->transportt);
1838
1839 return &i->t.host_attrs.ac == cont;
1840 }
1841
1842 static int fc_target_match(struct attribute_container *cont,
1843 struct device *dev)
1844 {
1845 struct Scsi_Host *shost;
1846 struct fc_internal *i;
1847
1848 if (!scsi_is_target_device(dev))
1849 return 0;
1850
1851 shost = dev_to_shost(dev->parent);
1852 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1853 != &fc_host_class.class)
1854 return 0;
1855
1856 i = to_fc_internal(shost->transportt);
1857
1858 return &i->t.target_attrs.ac == cont;
1859 }
1860
1861 static void fc_rport_dev_release(struct device *dev)
1862 {
1863 struct fc_rport *rport = dev_to_rport(dev);
1864 put_device(dev->parent);
1865 kfree(rport);
1866 }
1867
1868 int scsi_is_fc_rport(const struct device *dev)
1869 {
1870 return dev->release == fc_rport_dev_release;
1871 }
1872 EXPORT_SYMBOL(scsi_is_fc_rport);
1873
1874 static int fc_rport_match(struct attribute_container *cont,
1875 struct device *dev)
1876 {
1877 struct Scsi_Host *shost;
1878 struct fc_internal *i;
1879
1880 if (!scsi_is_fc_rport(dev))
1881 return 0;
1882
1883 shost = dev_to_shost(dev->parent);
1884 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1885 != &fc_host_class.class)
1886 return 0;
1887
1888 i = to_fc_internal(shost->transportt);
1889
1890 return &i->rport_attr_cont.ac == cont;
1891 }
1892
1893
1894 static void fc_vport_dev_release(struct device *dev)
1895 {
1896 struct fc_vport *vport = dev_to_vport(dev);
1897 put_device(dev->parent); /* release kobj parent */
1898 kfree(vport);
1899 }
1900
1901 int scsi_is_fc_vport(const struct device *dev)
1902 {
1903 return dev->release == fc_vport_dev_release;
1904 }
1905 EXPORT_SYMBOL(scsi_is_fc_vport);
1906
1907 static int fc_vport_match(struct attribute_container *cont,
1908 struct device *dev)
1909 {
1910 struct fc_vport *vport;
1911 struct Scsi_Host *shost;
1912 struct fc_internal *i;
1913
1914 if (!scsi_is_fc_vport(dev))
1915 return 0;
1916 vport = dev_to_vport(dev);
1917
1918 shost = vport_to_shost(vport);
1919 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1920 != &fc_host_class.class)
1921 return 0;
1922
1923 i = to_fc_internal(shost->transportt);
1924 return &i->vport_attr_cont.ac == cont;
1925 }
1926
1927
1928 /**
1929 * fc_timed_out - FC Transport I/O timeout intercept handler
1930 * @scmd: The SCSI command which timed out
1931 *
1932 * This routine protects against error handlers getting invoked while a
1933 * rport is in a blocked state, typically due to a temporarily loss of
1934 * connectivity. If the error handlers are allowed to proceed, requests
1935 * to abort i/o, reset the target, etc will likely fail as there is no way
1936 * to communicate with the device to perform the requested function. These
1937 * failures may result in the midlayer taking the device offline, requiring
1938 * manual intervention to restore operation.
1939 *
1940 * This routine, called whenever an i/o times out, validates the state of
1941 * the underlying rport. If the rport is blocked, it returns
1942 * EH_RESET_TIMER, which will continue to reschedule the timeout.
1943 * Eventually, either the device will return, or devloss_tmo will fire,
1944 * and when the timeout then fires, it will be handled normally.
1945 * If the rport is not blocked, normal error handling continues.
1946 *
1947 * Notes:
1948 * This routine assumes no locks are held on entry.
1949 */
1950 static enum blk_eh_timer_return
1951 fc_timed_out(struct scsi_cmnd *scmd)
1952 {
1953 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
1954
1955 if (rport->port_state == FC_PORTSTATE_BLOCKED)
1956 return BLK_EH_RESET_TIMER;
1957
1958 return BLK_EH_NOT_HANDLED;
1959 }
1960
1961 /*
1962 * Called by fc_user_scan to locate an rport on the shost that
1963 * matches the channel and target id, and invoke scsi_scan_target()
1964 * on the rport.
1965 */
1966 static void
1967 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
1968 {
1969 struct fc_rport *rport;
1970 unsigned long flags;
1971
1972 spin_lock_irqsave(shost->host_lock, flags);
1973
1974 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1975 if (rport->scsi_target_id == -1)
1976 continue;
1977
1978 if (rport->port_state != FC_PORTSTATE_ONLINE)
1979 continue;
1980
1981 if ((channel == rport->channel) &&
1982 (id == rport->scsi_target_id)) {
1983 spin_unlock_irqrestore(shost->host_lock, flags);
1984 scsi_scan_target(&rport->dev, channel, id, lun, 1);
1985 return;
1986 }
1987 }
1988
1989 spin_unlock_irqrestore(shost->host_lock, flags);
1990 }
1991
1992 /*
1993 * Called via sysfs scan routines. Necessary, as the FC transport
1994 * wants to place all target objects below the rport object. So this
1995 * routine must invoke the scsi_scan_target() routine with the rport
1996 * object as the parent.
1997 */
1998 static int
1999 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2000 {
2001 uint chlo, chhi;
2002 uint tgtlo, tgthi;
2003
2004 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2005 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2006 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2007 return -EINVAL;
2008
2009 if (channel == SCAN_WILD_CARD) {
2010 chlo = 0;
2011 chhi = shost->max_channel + 1;
2012 } else {
2013 chlo = channel;
2014 chhi = channel + 1;
2015 }
2016
2017 if (id == SCAN_WILD_CARD) {
2018 tgtlo = 0;
2019 tgthi = shost->max_id;
2020 } else {
2021 tgtlo = id;
2022 tgthi = id + 1;
2023 }
2024
2025 for ( ; chlo < chhi; chlo++)
2026 for ( ; tgtlo < tgthi; tgtlo++)
2027 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2028
2029 return 0;
2030 }
2031
2032 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2033 int result)
2034 {
2035 struct fc_internal *i = to_fc_internal(shost->transportt);
2036 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2037 }
2038
2039 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2040 {
2041 struct fc_internal *i = to_fc_internal(shost->transportt);
2042 return i->f->it_nexus_response(shost, nexus, result);
2043 }
2044
2045 struct scsi_transport_template *
2046 fc_attach_transport(struct fc_function_template *ft)
2047 {
2048 int count;
2049 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2050 GFP_KERNEL);
2051
2052 if (unlikely(!i))
2053 return NULL;
2054
2055 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2056 i->t.target_attrs.ac.class = &fc_transport_class.class;
2057 i->t.target_attrs.ac.match = fc_target_match;
2058 i->t.target_size = sizeof(struct fc_starget_attrs);
2059 transport_container_register(&i->t.target_attrs);
2060
2061 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2062 i->t.host_attrs.ac.class = &fc_host_class.class;
2063 i->t.host_attrs.ac.match = fc_host_match;
2064 i->t.host_size = sizeof(struct fc_host_attrs);
2065 if (ft->get_fc_host_stats)
2066 i->t.host_attrs.statistics = &fc_statistics_group;
2067 transport_container_register(&i->t.host_attrs);
2068
2069 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2070 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2071 i->rport_attr_cont.ac.match = fc_rport_match;
2072 transport_container_register(&i->rport_attr_cont);
2073
2074 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2075 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2076 i->vport_attr_cont.ac.match = fc_vport_match;
2077 transport_container_register(&i->vport_attr_cont);
2078
2079 i->f = ft;
2080
2081 /* Transport uses the shost workq for scsi scanning */
2082 i->t.create_work_queue = 1;
2083
2084 i->t.eh_timed_out = fc_timed_out;
2085
2086 i->t.user_scan = fc_user_scan;
2087
2088 /* target-mode drivers' functions */
2089 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2090 i->t.it_nexus_response = fc_it_nexus_response;
2091
2092 /*
2093 * Setup SCSI Target Attributes.
2094 */
2095 count = 0;
2096 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2097 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2098 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2099
2100 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2101
2102 i->starget_attrs[count] = NULL;
2103
2104
2105 /*
2106 * Setup SCSI Host Attributes.
2107 */
2108 count=0;
2109 SETUP_HOST_ATTRIBUTE_RD(node_name);
2110 SETUP_HOST_ATTRIBUTE_RD(port_name);
2111 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2112 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2113 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2114 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2115 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2116 if (ft->vport_create) {
2117 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2118 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2119 }
2120 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2121
2122 SETUP_HOST_ATTRIBUTE_RD(port_id);
2123 SETUP_HOST_ATTRIBUTE_RD(port_type);
2124 SETUP_HOST_ATTRIBUTE_RD(port_state);
2125 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2126 SETUP_HOST_ATTRIBUTE_RD(speed);
2127 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2128 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2129 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2130
2131 /* Transport-managed attributes */
2132 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2133 if (ft->issue_fc_host_lip)
2134 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2135 if (ft->vport_create)
2136 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2137 if (ft->vport_delete)
2138 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2139
2140 BUG_ON(count > FC_HOST_NUM_ATTRS);
2141
2142 i->host_attrs[count] = NULL;
2143
2144 /*
2145 * Setup Remote Port Attributes.
2146 */
2147 count=0;
2148 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2149 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2150 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2151 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2152 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2153 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2154 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2155 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2156 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2157 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2158
2159 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2160
2161 i->rport_attrs[count] = NULL;
2162
2163 /*
2164 * Setup Virtual Port Attributes.
2165 */
2166 count=0;
2167 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2168 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2169 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2170 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2171 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2172 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2173 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2174 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2175 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2176
2177 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2178
2179 i->vport_attrs[count] = NULL;
2180
2181 return &i->t;
2182 }
2183 EXPORT_SYMBOL(fc_attach_transport);
2184
2185 void fc_release_transport(struct scsi_transport_template *t)
2186 {
2187 struct fc_internal *i = to_fc_internal(t);
2188
2189 transport_container_unregister(&i->t.target_attrs);
2190 transport_container_unregister(&i->t.host_attrs);
2191 transport_container_unregister(&i->rport_attr_cont);
2192 transport_container_unregister(&i->vport_attr_cont);
2193
2194 kfree(i);
2195 }
2196 EXPORT_SYMBOL(fc_release_transport);
2197
2198 /**
2199 * fc_queue_work - Queue work to the fc_host workqueue.
2200 * @shost: Pointer to Scsi_Host bound to fc_host.
2201 * @work: Work to queue for execution.
2202 *
2203 * Return value:
2204 * 1 - work queued for execution
2205 * 0 - work is already queued
2206 * -EINVAL - work queue doesn't exist
2207 */
2208 static int
2209 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2210 {
2211 if (unlikely(!fc_host_work_q(shost))) {
2212 printk(KERN_ERR
2213 "ERROR: FC host '%s' attempted to queue work, "
2214 "when no workqueue created.\n", shost->hostt->name);
2215 dump_stack();
2216
2217 return -EINVAL;
2218 }
2219
2220 return queue_work(fc_host_work_q(shost), work);
2221 }
2222
2223 /**
2224 * fc_flush_work - Flush a fc_host's workqueue.
2225 * @shost: Pointer to Scsi_Host bound to fc_host.
2226 */
2227 static void
2228 fc_flush_work(struct Scsi_Host *shost)
2229 {
2230 if (!fc_host_work_q(shost)) {
2231 printk(KERN_ERR
2232 "ERROR: FC host '%s' attempted to flush work, "
2233 "when no workqueue created.\n", shost->hostt->name);
2234 dump_stack();
2235 return;
2236 }
2237
2238 flush_workqueue(fc_host_work_q(shost));
2239 }
2240
2241 /**
2242 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2243 * @shost: Pointer to Scsi_Host bound to fc_host.
2244 * @work: Work to queue for execution.
2245 * @delay: jiffies to delay the work queuing
2246 *
2247 * Return value:
2248 * 1 on success / 0 already queued / < 0 for error
2249 */
2250 static int
2251 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2252 unsigned long delay)
2253 {
2254 if (unlikely(!fc_host_devloss_work_q(shost))) {
2255 printk(KERN_ERR
2256 "ERROR: FC host '%s' attempted to queue work, "
2257 "when no workqueue created.\n", shost->hostt->name);
2258 dump_stack();
2259
2260 return -EINVAL;
2261 }
2262
2263 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2264 }
2265
2266 /**
2267 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2268 * @shost: Pointer to Scsi_Host bound to fc_host.
2269 */
2270 static void
2271 fc_flush_devloss(struct Scsi_Host *shost)
2272 {
2273 if (!fc_host_devloss_work_q(shost)) {
2274 printk(KERN_ERR
2275 "ERROR: FC host '%s' attempted to flush work, "
2276 "when no workqueue created.\n", shost->hostt->name);
2277 dump_stack();
2278 return;
2279 }
2280
2281 flush_workqueue(fc_host_devloss_work_q(shost));
2282 }
2283
2284
2285 /**
2286 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2287 * @shost: Which &Scsi_Host
2288 *
2289 * This routine is expected to be called immediately preceeding the
2290 * a driver's call to scsi_remove_host().
2291 *
2292 * WARNING: A driver utilizing the fc_transport, which fails to call
2293 * this routine prior to scsi_remove_host(), will leave dangling
2294 * objects in /sys/class/fc_remote_ports. Access to any of these
2295 * objects can result in a system crash !!!
2296 *
2297 * Notes:
2298 * This routine assumes no locks are held on entry.
2299 */
2300 void
2301 fc_remove_host(struct Scsi_Host *shost)
2302 {
2303 struct fc_vport *vport = NULL, *next_vport = NULL;
2304 struct fc_rport *rport = NULL, *next_rport = NULL;
2305 struct workqueue_struct *work_q;
2306 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2307 unsigned long flags;
2308
2309 spin_lock_irqsave(shost->host_lock, flags);
2310
2311 /* Remove any vports */
2312 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2313 fc_queue_work(shost, &vport->vport_delete_work);
2314
2315 /* Remove any remote ports */
2316 list_for_each_entry_safe(rport, next_rport,
2317 &fc_host->rports, peers) {
2318 list_del(&rport->peers);
2319 rport->port_state = FC_PORTSTATE_DELETED;
2320 fc_queue_work(shost, &rport->rport_delete_work);
2321 }
2322
2323 list_for_each_entry_safe(rport, next_rport,
2324 &fc_host->rport_bindings, peers) {
2325 list_del(&rport->peers);
2326 rport->port_state = FC_PORTSTATE_DELETED;
2327 fc_queue_work(shost, &rport->rport_delete_work);
2328 }
2329
2330 spin_unlock_irqrestore(shost->host_lock, flags);
2331
2332 /* flush all scan work items */
2333 scsi_flush_work(shost);
2334
2335 /* flush all stgt delete, and rport delete work items, then kill it */
2336 if (fc_host->work_q) {
2337 work_q = fc_host->work_q;
2338 fc_host->work_q = NULL;
2339 destroy_workqueue(work_q);
2340 }
2341
2342 /* flush all devloss work items, then kill it */
2343 if (fc_host->devloss_work_q) {
2344 work_q = fc_host->devloss_work_q;
2345 fc_host->devloss_work_q = NULL;
2346 destroy_workqueue(work_q);
2347 }
2348 }
2349 EXPORT_SYMBOL(fc_remove_host);
2350
2351 static void fc_terminate_rport_io(struct fc_rport *rport)
2352 {
2353 struct Scsi_Host *shost = rport_to_shost(rport);
2354 struct fc_internal *i = to_fc_internal(shost->transportt);
2355
2356 /* Involve the LLDD if possible to terminate all io on the rport. */
2357 if (i->f->terminate_rport_io)
2358 i->f->terminate_rport_io(rport);
2359
2360 /*
2361 * must unblock to flush queued IO. The caller will have set
2362 * the port_state or flags, so that fc_remote_port_chkready will
2363 * fail IO.
2364 */
2365 scsi_target_unblock(&rport->dev);
2366 }
2367
2368 /**
2369 * fc_starget_delete - called to delete the scsi decendents of an rport
2370 * @work: remote port to be operated on.
2371 *
2372 * Deletes target and all sdevs.
2373 */
2374 static void
2375 fc_starget_delete(struct work_struct *work)
2376 {
2377 struct fc_rport *rport =
2378 container_of(work, struct fc_rport, stgt_delete_work);
2379
2380 fc_terminate_rport_io(rport);
2381 scsi_remove_target(&rport->dev);
2382 }
2383
2384
2385 /**
2386 * fc_rport_final_delete - finish rport termination and delete it.
2387 * @work: remote port to be deleted.
2388 */
2389 static void
2390 fc_rport_final_delete(struct work_struct *work)
2391 {
2392 struct fc_rport *rport =
2393 container_of(work, struct fc_rport, rport_delete_work);
2394 struct device *dev = &rport->dev;
2395 struct Scsi_Host *shost = rport_to_shost(rport);
2396 struct fc_internal *i = to_fc_internal(shost->transportt);
2397 unsigned long flags;
2398
2399 /*
2400 * if a scan is pending, flush the SCSI Host work_q so that
2401 * that we can reclaim the rport scan work element.
2402 */
2403 if (rport->flags & FC_RPORT_SCAN_PENDING)
2404 scsi_flush_work(shost);
2405
2406 fc_terminate_rport_io(rport);
2407
2408 /*
2409 * Cancel any outstanding timers. These should really exist
2410 * only when rmmod'ing the LLDD and we're asking for
2411 * immediate termination of the rports
2412 */
2413 spin_lock_irqsave(shost->host_lock, flags);
2414 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2415 spin_unlock_irqrestore(shost->host_lock, flags);
2416 if (!cancel_delayed_work(&rport->fail_io_work))
2417 fc_flush_devloss(shost);
2418 if (!cancel_delayed_work(&rport->dev_loss_work))
2419 fc_flush_devloss(shost);
2420 spin_lock_irqsave(shost->host_lock, flags);
2421 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2422 }
2423 spin_unlock_irqrestore(shost->host_lock, flags);
2424
2425 /* Delete SCSI target and sdevs */
2426 if (rport->scsi_target_id != -1)
2427 fc_starget_delete(&rport->stgt_delete_work);
2428
2429 /*
2430 * Notify the driver that the rport is now dead. The LLDD will
2431 * also guarantee that any communication to the rport is terminated
2432 *
2433 * Avoid this call if we already called it when we preserved the
2434 * rport for the binding.
2435 */
2436 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2437 (i->f->dev_loss_tmo_callbk))
2438 i->f->dev_loss_tmo_callbk(rport);
2439
2440 fc_bsg_remove(rport->rqst_q);
2441
2442 transport_remove_device(dev);
2443 device_del(dev);
2444 transport_destroy_device(dev);
2445 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2446 put_device(dev); /* for self-reference */
2447 }
2448
2449
2450 /**
2451 * fc_rport_create - allocates and creates a remote FC port.
2452 * @shost: scsi host the remote port is connected to.
2453 * @channel: Channel on shost port connected to.
2454 * @ids: The world wide names, fc address, and FC4 port
2455 * roles for the remote port.
2456 *
2457 * Allocates and creates the remoter port structure, including the
2458 * class and sysfs creation.
2459 *
2460 * Notes:
2461 * This routine assumes no locks are held on entry.
2462 */
2463 static struct fc_rport *
2464 fc_rport_create(struct Scsi_Host *shost, int channel,
2465 struct fc_rport_identifiers *ids)
2466 {
2467 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2468 struct fc_internal *fci = to_fc_internal(shost->transportt);
2469 struct fc_rport *rport;
2470 struct device *dev;
2471 unsigned long flags;
2472 int error;
2473 size_t size;
2474
2475 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2476 rport = kzalloc(size, GFP_KERNEL);
2477 if (unlikely(!rport)) {
2478 printk(KERN_ERR "%s: allocation failure\n", __func__);
2479 return NULL;
2480 }
2481
2482 rport->maxframe_size = -1;
2483 rport->supported_classes = FC_COS_UNSPECIFIED;
2484 rport->dev_loss_tmo = fc_dev_loss_tmo;
2485 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2486 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2487 rport->port_id = ids->port_id;
2488 rport->roles = ids->roles;
2489 rport->port_state = FC_PORTSTATE_ONLINE;
2490 if (fci->f->dd_fcrport_size)
2491 rport->dd_data = &rport[1];
2492 rport->channel = channel;
2493 rport->fast_io_fail_tmo = -1;
2494
2495 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2496 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2497 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2498 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2499 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2500
2501 spin_lock_irqsave(shost->host_lock, flags);
2502
2503 rport->number = fc_host->next_rport_number++;
2504 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2505 rport->scsi_target_id = fc_host->next_target_id++;
2506 else
2507 rport->scsi_target_id = -1;
2508 list_add_tail(&rport->peers, &fc_host->rports);
2509 get_device(&shost->shost_gendev); /* for fc_host->rport list */
2510
2511 spin_unlock_irqrestore(shost->host_lock, flags);
2512
2513 dev = &rport->dev;
2514 device_initialize(dev); /* takes self reference */
2515 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2516 dev->release = fc_rport_dev_release;
2517 dev_set_name(dev, "rport-%d:%d-%d",
2518 shost->host_no, channel, rport->number);
2519 transport_setup_device(dev);
2520
2521 error = device_add(dev);
2522 if (error) {
2523 printk(KERN_ERR "FC Remote Port device_add failed\n");
2524 goto delete_rport;
2525 }
2526 transport_add_device(dev);
2527 transport_configure_device(dev);
2528
2529 fc_bsg_rportadd(shost, rport);
2530 /* ignore any bsg add error - we just can't do sgio */
2531
2532 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2533 /* initiate a scan of the target */
2534 rport->flags |= FC_RPORT_SCAN_PENDING;
2535 scsi_queue_work(shost, &rport->scan_work);
2536 }
2537
2538 return rport;
2539
2540 delete_rport:
2541 transport_destroy_device(dev);
2542 spin_lock_irqsave(shost->host_lock, flags);
2543 list_del(&rport->peers);
2544 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2545 spin_unlock_irqrestore(shost->host_lock, flags);
2546 put_device(dev->parent);
2547 kfree(rport);
2548 return NULL;
2549 }
2550
2551 /**
2552 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2553 * @shost: scsi host the remote port is connected to.
2554 * @channel: Channel on shost port connected to.
2555 * @ids: The world wide names, fc address, and FC4 port
2556 * roles for the remote port.
2557 *
2558 * The LLDD calls this routine to notify the transport of the existence
2559 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2560 * of the port, it's FC address (port_id), and the FC4 roles that are
2561 * active for the port.
2562 *
2563 * For ports that are FCP targets (aka scsi targets), the FC transport
2564 * maintains consistent target id bindings on behalf of the LLDD.
2565 * A consistent target id binding is an assignment of a target id to
2566 * a remote port identifier, which persists while the scsi host is
2567 * attached. The remote port can disappear, then later reappear, and
2568 * it's target id assignment remains the same. This allows for shifts
2569 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2570 * changes to the scsi subsystem which is based on scsi host number and
2571 * target id values. Bindings are only valid during the attachment of
2572 * the scsi host. If the host detaches, then later re-attaches, target
2573 * id bindings may change.
2574 *
2575 * This routine is responsible for returning a remote port structure.
2576 * The routine will search the list of remote ports it maintains
2577 * internally on behalf of consistent target id mappings. If found, the
2578 * remote port structure will be reused. Otherwise, a new remote port
2579 * structure will be allocated.
2580 *
2581 * Whenever a remote port is allocated, a new fc_remote_port class
2582 * device is created.
2583 *
2584 * Should not be called from interrupt context.
2585 *
2586 * Notes:
2587 * This routine assumes no locks are held on entry.
2588 */
2589 struct fc_rport *
2590 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2591 struct fc_rport_identifiers *ids)
2592 {
2593 struct fc_internal *fci = to_fc_internal(shost->transportt);
2594 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2595 struct fc_rport *rport;
2596 unsigned long flags;
2597 int match = 0;
2598
2599 /* ensure any stgt delete functions are done */
2600 fc_flush_work(shost);
2601
2602 /*
2603 * Search the list of "active" rports, for an rport that has been
2604 * deleted, but we've held off the real delete while the target
2605 * is in a "blocked" state.
2606 */
2607 spin_lock_irqsave(shost->host_lock, flags);
2608
2609 list_for_each_entry(rport, &fc_host->rports, peers) {
2610
2611 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2612 (rport->channel == channel)) {
2613
2614 switch (fc_host->tgtid_bind_type) {
2615 case FC_TGTID_BIND_BY_WWPN:
2616 case FC_TGTID_BIND_NONE:
2617 if (rport->port_name == ids->port_name)
2618 match = 1;
2619 break;
2620 case FC_TGTID_BIND_BY_WWNN:
2621 if (rport->node_name == ids->node_name)
2622 match = 1;
2623 break;
2624 case FC_TGTID_BIND_BY_ID:
2625 if (rport->port_id == ids->port_id)
2626 match = 1;
2627 break;
2628 }
2629
2630 if (match) {
2631
2632 memcpy(&rport->node_name, &ids->node_name,
2633 sizeof(rport->node_name));
2634 memcpy(&rport->port_name, &ids->port_name,
2635 sizeof(rport->port_name));
2636 rport->port_id = ids->port_id;
2637
2638 rport->port_state = FC_PORTSTATE_ONLINE;
2639 rport->roles = ids->roles;
2640
2641 spin_unlock_irqrestore(shost->host_lock, flags);
2642
2643 if (fci->f->dd_fcrport_size)
2644 memset(rport->dd_data, 0,
2645 fci->f->dd_fcrport_size);
2646
2647 /*
2648 * If we were not a target, cancel the
2649 * io terminate and rport timers, and
2650 * we're done.
2651 *
2652 * If we were a target, but our new role
2653 * doesn't indicate a target, leave the
2654 * timers running expecting the role to
2655 * change as the target fully logs in. If
2656 * it doesn't, the target will be torn down.
2657 *
2658 * If we were a target, and our role shows
2659 * we're still a target, cancel the timers
2660 * and kick off a scan.
2661 */
2662
2663 /* was a target, not in roles */
2664 if ((rport->scsi_target_id != -1) &&
2665 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2666 return rport;
2667
2668 /*
2669 * Stop the fail io and dev_loss timers.
2670 * If they flush, the port_state will
2671 * be checked and will NOOP the function.
2672 */
2673 if (!cancel_delayed_work(&rport->fail_io_work))
2674 fc_flush_devloss(shost);
2675 if (!cancel_delayed_work(&rport->dev_loss_work))
2676 fc_flush_devloss(shost);
2677
2678 spin_lock_irqsave(shost->host_lock, flags);
2679
2680 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2681 FC_RPORT_DEVLOSS_PENDING |
2682 FC_RPORT_DEVLOSS_CALLBK_DONE);
2683
2684 /* if target, initiate a scan */
2685 if (rport->scsi_target_id != -1) {
2686 rport->flags |= FC_RPORT_SCAN_PENDING;
2687 scsi_queue_work(shost,
2688 &rport->scan_work);
2689 spin_unlock_irqrestore(shost->host_lock,
2690 flags);
2691 scsi_target_unblock(&rport->dev);
2692 } else
2693 spin_unlock_irqrestore(shost->host_lock,
2694 flags);
2695
2696 fc_bsg_goose_queue(rport);
2697
2698 return rport;
2699 }
2700 }
2701 }
2702
2703 /*
2704 * Search the bindings array
2705 * Note: if never a FCP target, you won't be on this list
2706 */
2707 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2708
2709 /* search for a matching consistent binding */
2710
2711 list_for_each_entry(rport, &fc_host->rport_bindings,
2712 peers) {
2713 if (rport->channel != channel)
2714 continue;
2715
2716 switch (fc_host->tgtid_bind_type) {
2717 case FC_TGTID_BIND_BY_WWPN:
2718 if (rport->port_name == ids->port_name)
2719 match = 1;
2720 break;
2721 case FC_TGTID_BIND_BY_WWNN:
2722 if (rport->node_name == ids->node_name)
2723 match = 1;
2724 break;
2725 case FC_TGTID_BIND_BY_ID:
2726 if (rport->port_id == ids->port_id)
2727 match = 1;
2728 break;
2729 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2730 break;
2731 }
2732
2733 if (match) {
2734 list_move_tail(&rport->peers, &fc_host->rports);
2735 break;
2736 }
2737 }
2738
2739 if (match) {
2740 memcpy(&rport->node_name, &ids->node_name,
2741 sizeof(rport->node_name));
2742 memcpy(&rport->port_name, &ids->port_name,
2743 sizeof(rport->port_name));
2744 rport->port_id = ids->port_id;
2745 rport->roles = ids->roles;
2746 rport->port_state = FC_PORTSTATE_ONLINE;
2747 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2748
2749 if (fci->f->dd_fcrport_size)
2750 memset(rport->dd_data, 0,
2751 fci->f->dd_fcrport_size);
2752
2753 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2754 /* initiate a scan of the target */
2755 rport->flags |= FC_RPORT_SCAN_PENDING;
2756 scsi_queue_work(shost, &rport->scan_work);
2757 spin_unlock_irqrestore(shost->host_lock, flags);
2758 scsi_target_unblock(&rport->dev);
2759 } else
2760 spin_unlock_irqrestore(shost->host_lock, flags);
2761
2762 return rport;
2763 }
2764 }
2765
2766 spin_unlock_irqrestore(shost->host_lock, flags);
2767
2768 /* No consistent binding found - create new remote port entry */
2769 rport = fc_rport_create(shost, channel, ids);
2770
2771 return rport;
2772 }
2773 EXPORT_SYMBOL(fc_remote_port_add);
2774
2775
2776 /**
2777 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2778 * @rport: The remote port that no longer exists
2779 *
2780 * The LLDD calls this routine to notify the transport that a remote
2781 * port is no longer part of the topology. Note: Although a port
2782 * may no longer be part of the topology, it may persist in the remote
2783 * ports displayed by the fc_host. We do this under 2 conditions:
2784 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2785 * This allows the port to temporarily disappear, then reappear without
2786 * disrupting the SCSI device tree attached to it. During the "blocked"
2787 * period the port will still exist.
2788 * 2) If the port was a scsi target and disappears for longer than we
2789 * expect, we'll delete the port and the tear down the SCSI device tree
2790 * attached to it. However, we want to semi-persist the target id assigned
2791 * to that port if it eventually does exist. The port structure will
2792 * remain (although with minimal information) so that the target id
2793 * bindings remails.
2794 *
2795 * If the remote port is not an FCP Target, it will be fully torn down
2796 * and deallocated, including the fc_remote_port class device.
2797 *
2798 * If the remote port is an FCP Target, the port will be placed in a
2799 * temporary blocked state. From the LLDD's perspective, the rport no
2800 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2801 * exists, but all sdevs on it are blocked from further I/O. The following
2802 * is then expected.
2803 *
2804 * If the remote port does not return (signaled by a LLDD call to
2805 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2806 * scsi target is removed - killing all outstanding i/o and removing the
2807 * scsi devices attached ot it. The port structure will be marked Not
2808 * Present and be partially cleared, leaving only enough information to
2809 * recognize the remote port relative to the scsi target id binding if
2810 * it later appears. The port will remain as long as there is a valid
2811 * binding (e.g. until the user changes the binding type or unloads the
2812 * scsi host with the binding).
2813 *
2814 * If the remote port returns within the dev_loss_tmo value (and matches
2815 * according to the target id binding type), the port structure will be
2816 * reused. If it is no longer a SCSI target, the target will be torn
2817 * down. If it continues to be a SCSI target, then the target will be
2818 * unblocked (allowing i/o to be resumed), and a scan will be activated
2819 * to ensure that all luns are detected.
2820 *
2821 * Called from normal process context only - cannot be called from interrupt.
2822 *
2823 * Notes:
2824 * This routine assumes no locks are held on entry.
2825 */
2826 void
2827 fc_remote_port_delete(struct fc_rport *rport)
2828 {
2829 struct Scsi_Host *shost = rport_to_shost(rport);
2830 int timeout = rport->dev_loss_tmo;
2831 unsigned long flags;
2832
2833 /*
2834 * No need to flush the fc_host work_q's, as all adds are synchronous.
2835 *
2836 * We do need to reclaim the rport scan work element, so eventually
2837 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2838 * there's still a scan pending.
2839 */
2840
2841 spin_lock_irqsave(shost->host_lock, flags);
2842
2843 if (rport->port_state != FC_PORTSTATE_ONLINE) {
2844 spin_unlock_irqrestore(shost->host_lock, flags);
2845 return;
2846 }
2847
2848 /*
2849 * In the past, we if this was not an FCP-Target, we would
2850 * unconditionally just jump to deleting the rport.
2851 * However, rports can be used as node containers by the LLDD,
2852 * and its not appropriate to just terminate the rport at the
2853 * first sign of a loss in connectivity. The LLDD may want to
2854 * send ELS traffic to re-validate the login. If the rport is
2855 * immediately deleted, it makes it inappropriate for a node
2856 * container.
2857 * So... we now unconditionally wait dev_loss_tmo before
2858 * destroying an rport.
2859 */
2860
2861 rport->port_state = FC_PORTSTATE_BLOCKED;
2862
2863 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2864
2865 spin_unlock_irqrestore(shost->host_lock, flags);
2866
2867 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
2868 shost->active_mode & MODE_TARGET)
2869 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
2870
2871 scsi_target_block(&rport->dev);
2872
2873 /* see if we need to kill io faster than waiting for device loss */
2874 if ((rport->fast_io_fail_tmo != -1) &&
2875 (rport->fast_io_fail_tmo < timeout))
2876 fc_queue_devloss_work(shost, &rport->fail_io_work,
2877 rport->fast_io_fail_tmo * HZ);
2878
2879 /* cap the length the devices can be blocked until they are deleted */
2880 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
2881 }
2882 EXPORT_SYMBOL(fc_remote_port_delete);
2883
2884 /**
2885 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
2886 * @rport: The remote port that changed.
2887 * @roles: New roles for this port.
2888 *
2889 * Description: The LLDD calls this routine to notify the transport that the
2890 * roles on a remote port may have changed. The largest effect of this is
2891 * if a port now becomes a FCP Target, it must be allocated a
2892 * scsi target id. If the port is no longer a FCP target, any
2893 * scsi target id value assigned to it will persist in case the
2894 * role changes back to include FCP Target. No changes in the scsi
2895 * midlayer will be invoked if the role changes (in the expectation
2896 * that the role will be resumed. If it doesn't normal error processing
2897 * will take place).
2898 *
2899 * Should not be called from interrupt context.
2900 *
2901 * Notes:
2902 * This routine assumes no locks are held on entry.
2903 */
2904 void
2905 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
2906 {
2907 struct Scsi_Host *shost = rport_to_shost(rport);
2908 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2909 unsigned long flags;
2910 int create = 0;
2911 int ret;
2912
2913 spin_lock_irqsave(shost->host_lock, flags);
2914 if (roles & FC_PORT_ROLE_FCP_TARGET) {
2915 if (rport->scsi_target_id == -1) {
2916 rport->scsi_target_id = fc_host->next_target_id++;
2917 create = 1;
2918 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
2919 create = 1;
2920 } else if (shost->active_mode & MODE_TARGET) {
2921 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
2922 (char *)&rport->node_name);
2923 if (ret)
2924 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
2925 ret);
2926 }
2927
2928 rport->roles = roles;
2929
2930 spin_unlock_irqrestore(shost->host_lock, flags);
2931
2932 if (create) {
2933 /*
2934 * There may have been a delete timer running on the
2935 * port. Ensure that it is cancelled as we now know
2936 * the port is an FCP Target.
2937 * Note: we know the rport is exists and in an online
2938 * state as the LLDD would not have had an rport
2939 * reference to pass us.
2940 *
2941 * Take no action on the del_timer failure as the state
2942 * machine state change will validate the
2943 * transaction.
2944 */
2945 if (!cancel_delayed_work(&rport->fail_io_work))
2946 fc_flush_devloss(shost);
2947 if (!cancel_delayed_work(&rport->dev_loss_work))
2948 fc_flush_devloss(shost);
2949
2950 spin_lock_irqsave(shost->host_lock, flags);
2951 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2952 FC_RPORT_DEVLOSS_PENDING);
2953 spin_unlock_irqrestore(shost->host_lock, flags);
2954
2955 /* ensure any stgt delete functions are done */
2956 fc_flush_work(shost);
2957
2958 /* initiate a scan of the target */
2959 spin_lock_irqsave(shost->host_lock, flags);
2960 rport->flags |= FC_RPORT_SCAN_PENDING;
2961 scsi_queue_work(shost, &rport->scan_work);
2962 spin_unlock_irqrestore(shost->host_lock, flags);
2963 scsi_target_unblock(&rport->dev);
2964 }
2965 }
2966 EXPORT_SYMBOL(fc_remote_port_rolechg);
2967
2968 /**
2969 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
2970 * @work: rport target that failed to reappear in the allotted time.
2971 *
2972 * Description: An attempt to delete a remote port blocks, and if it fails
2973 * to return in the allotted time this gets called.
2974 */
2975 static void
2976 fc_timeout_deleted_rport(struct work_struct *work)
2977 {
2978 struct fc_rport *rport =
2979 container_of(work, struct fc_rport, dev_loss_work.work);
2980 struct Scsi_Host *shost = rport_to_shost(rport);
2981 struct fc_internal *i = to_fc_internal(shost->transportt);
2982 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2983 unsigned long flags;
2984
2985 spin_lock_irqsave(shost->host_lock, flags);
2986
2987 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2988
2989 /*
2990 * If the port is ONLINE, then it came back. If it was a SCSI
2991 * target, validate it still is. If not, tear down the
2992 * scsi_target on it.
2993 */
2994 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
2995 (rport->scsi_target_id != -1) &&
2996 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
2997 dev_printk(KERN_ERR, &rport->dev,
2998 "blocked FC remote port time out: no longer"
2999 " a FCP target, removing starget\n");
3000 spin_unlock_irqrestore(shost->host_lock, flags);
3001 scsi_target_unblock(&rport->dev);
3002 fc_queue_work(shost, &rport->stgt_delete_work);
3003 return;
3004 }
3005
3006 /* NOOP state - we're flushing workq's */
3007 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3008 spin_unlock_irqrestore(shost->host_lock, flags);
3009 dev_printk(KERN_ERR, &rport->dev,
3010 "blocked FC remote port time out: leaving"
3011 " rport%s alone\n",
3012 (rport->scsi_target_id != -1) ? " and starget" : "");
3013 return;
3014 }
3015
3016 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3017 (rport->scsi_target_id == -1)) {
3018 list_del(&rport->peers);
3019 rport->port_state = FC_PORTSTATE_DELETED;
3020 dev_printk(KERN_ERR, &rport->dev,
3021 "blocked FC remote port time out: removing"
3022 " rport%s\n",
3023 (rport->scsi_target_id != -1) ? " and starget" : "");
3024 fc_queue_work(shost, &rport->rport_delete_work);
3025 spin_unlock_irqrestore(shost->host_lock, flags);
3026 return;
3027 }
3028
3029 dev_printk(KERN_ERR, &rport->dev,
3030 "blocked FC remote port time out: removing target and "
3031 "saving binding\n");
3032
3033 list_move_tail(&rport->peers, &fc_host->rport_bindings);
3034
3035 /*
3036 * Note: We do not remove or clear the hostdata area. This allows
3037 * host-specific target data to persist along with the
3038 * scsi_target_id. It's up to the host to manage it's hostdata area.
3039 */
3040
3041 /*
3042 * Reinitialize port attributes that may change if the port comes back.
3043 */
3044 rport->maxframe_size = -1;
3045 rport->supported_classes = FC_COS_UNSPECIFIED;
3046 rport->roles = FC_PORT_ROLE_UNKNOWN;
3047 rport->port_state = FC_PORTSTATE_NOTPRESENT;
3048 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3049 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3050
3051 /*
3052 * Pre-emptively kill I/O rather than waiting for the work queue
3053 * item to teardown the starget. (FCOE libFC folks prefer this
3054 * and to have the rport_port_id still set when it's done).
3055 */
3056 spin_unlock_irqrestore(shost->host_lock, flags);
3057 fc_terminate_rport_io(rport);
3058
3059 BUG_ON(rport->port_state != FC_PORTSTATE_NOTPRESENT);
3060
3061 /* remove the identifiers that aren't used in the consisting binding */
3062 switch (fc_host->tgtid_bind_type) {
3063 case FC_TGTID_BIND_BY_WWPN:
3064 rport->node_name = -1;
3065 rport->port_id = -1;
3066 break;
3067 case FC_TGTID_BIND_BY_WWNN:
3068 rport->port_name = -1;
3069 rport->port_id = -1;
3070 break;
3071 case FC_TGTID_BIND_BY_ID:
3072 rport->node_name = -1;
3073 rport->port_name = -1;
3074 break;
3075 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3076 break;
3077 }
3078
3079 /*
3080 * As this only occurs if the remote port (scsi target)
3081 * went away and didn't come back - we'll remove
3082 * all attached scsi devices.
3083 */
3084 fc_queue_work(shost, &rport->stgt_delete_work);
3085
3086 /*
3087 * Notify the driver that the rport is now dead. The LLDD will
3088 * also guarantee that any communication to the rport is terminated
3089 *
3090 * Note: we set the CALLBK_DONE flag above to correspond
3091 */
3092 if (i->f->dev_loss_tmo_callbk)
3093 i->f->dev_loss_tmo_callbk(rport);
3094 }
3095
3096
3097 /**
3098 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3099 * @work: rport to terminate io on.
3100 *
3101 * Notes: Only requests the failure of the io, not that all are flushed
3102 * prior to returning.
3103 */
3104 static void
3105 fc_timeout_fail_rport_io(struct work_struct *work)
3106 {
3107 struct fc_rport *rport =
3108 container_of(work, struct fc_rport, fail_io_work.work);
3109
3110 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3111 return;
3112
3113 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3114 fc_terminate_rport_io(rport);
3115 }
3116
3117 /**
3118 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3119 * @work: remote port to be scanned.
3120 */
3121 static void
3122 fc_scsi_scan_rport(struct work_struct *work)
3123 {
3124 struct fc_rport *rport =
3125 container_of(work, struct fc_rport, scan_work);
3126 struct Scsi_Host *shost = rport_to_shost(rport);
3127 struct fc_internal *i = to_fc_internal(shost->transportt);
3128 unsigned long flags;
3129
3130 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3131 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3132 !(i->f->disable_target_scan)) {
3133 scsi_scan_target(&rport->dev, rport->channel,
3134 rport->scsi_target_id, SCAN_WILD_CARD, 1);
3135 }
3136
3137 spin_lock_irqsave(shost->host_lock, flags);
3138 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3139 spin_unlock_irqrestore(shost->host_lock, flags);
3140 }
3141
3142
3143 /**
3144 * fc_vport_setup - allocates and creates a FC virtual port.
3145 * @shost: scsi host the virtual port is connected to.
3146 * @channel: Channel on shost port connected to.
3147 * @pdev: parent device for vport
3148 * @ids: The world wide names, FC4 port roles, etc for
3149 * the virtual port.
3150 * @ret_vport: The pointer to the created vport.
3151 *
3152 * Allocates and creates the vport structure, calls the parent host
3153 * to instantiate the vport, the completes w/ class and sysfs creation.
3154 *
3155 * Notes:
3156 * This routine assumes no locks are held on entry.
3157 */
3158 static int
3159 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3160 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3161 {
3162 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3163 struct fc_internal *fci = to_fc_internal(shost->transportt);
3164 struct fc_vport *vport;
3165 struct device *dev;
3166 unsigned long flags;
3167 size_t size;
3168 int error;
3169
3170 *ret_vport = NULL;
3171
3172 if ( ! fci->f->vport_create)
3173 return -ENOENT;
3174
3175 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3176 vport = kzalloc(size, GFP_KERNEL);
3177 if (unlikely(!vport)) {
3178 printk(KERN_ERR "%s: allocation failure\n", __func__);
3179 return -ENOMEM;
3180 }
3181
3182 vport->vport_state = FC_VPORT_UNKNOWN;
3183 vport->vport_last_state = FC_VPORT_UNKNOWN;
3184 vport->node_name = ids->node_name;
3185 vport->port_name = ids->port_name;
3186 vport->roles = ids->roles;
3187 vport->vport_type = ids->vport_type;
3188 if (fci->f->dd_fcvport_size)
3189 vport->dd_data = &vport[1];
3190 vport->shost = shost;
3191 vport->channel = channel;
3192 vport->flags = FC_VPORT_CREATING;
3193 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3194
3195 spin_lock_irqsave(shost->host_lock, flags);
3196
3197 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3198 spin_unlock_irqrestore(shost->host_lock, flags);
3199 kfree(vport);
3200 return -ENOSPC;
3201 }
3202 fc_host->npiv_vports_inuse++;
3203 vport->number = fc_host->next_vport_number++;
3204 list_add_tail(&vport->peers, &fc_host->vports);
3205 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3206
3207 spin_unlock_irqrestore(shost->host_lock, flags);
3208
3209 dev = &vport->dev;
3210 device_initialize(dev); /* takes self reference */
3211 dev->parent = get_device(pdev); /* takes parent reference */
3212 dev->release = fc_vport_dev_release;
3213 dev_set_name(dev, "vport-%d:%d-%d",
3214 shost->host_no, channel, vport->number);
3215 transport_setup_device(dev);
3216
3217 error = device_add(dev);
3218 if (error) {
3219 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3220 goto delete_vport;
3221 }
3222 transport_add_device(dev);
3223 transport_configure_device(dev);
3224
3225 error = fci->f->vport_create(vport, ids->disable);
3226 if (error) {
3227 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3228 goto delete_vport_all;
3229 }
3230
3231 /*
3232 * if the parent isn't the physical adapter's Scsi_Host, ensure
3233 * the Scsi_Host at least contains ia symlink to the vport.
3234 */
3235 if (pdev != &shost->shost_gendev) {
3236 error = sysfs_create_link(&shost->shost_gendev.kobj,
3237 &dev->kobj, dev_name(dev));
3238 if (error)
3239 printk(KERN_ERR
3240 "%s: Cannot create vport symlinks for "
3241 "%s, err=%d\n",
3242 __func__, dev_name(dev), error);
3243 }
3244 spin_lock_irqsave(shost->host_lock, flags);
3245 vport->flags &= ~FC_VPORT_CREATING;
3246 spin_unlock_irqrestore(shost->host_lock, flags);
3247
3248 dev_printk(KERN_NOTICE, pdev,
3249 "%s created via shost%d channel %d\n", dev_name(dev),
3250 shost->host_no, channel);
3251
3252 *ret_vport = vport;
3253
3254 return 0;
3255
3256 delete_vport_all:
3257 transport_remove_device(dev);
3258 device_del(dev);
3259 delete_vport:
3260 transport_destroy_device(dev);
3261 spin_lock_irqsave(shost->host_lock, flags);
3262 list_del(&vport->peers);
3263 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3264 fc_host->npiv_vports_inuse--;
3265 spin_unlock_irqrestore(shost->host_lock, flags);
3266 put_device(dev->parent);
3267 kfree(vport);
3268
3269 return error;
3270 }
3271
3272 /**
3273 * fc_vport_create - Admin App or LLDD requests creation of a vport
3274 * @shost: scsi host the virtual port is connected to.
3275 * @channel: channel on shost port connected to.
3276 * @ids: The world wide names, FC4 port roles, etc for
3277 * the virtual port.
3278 *
3279 * Notes:
3280 * This routine assumes no locks are held on entry.
3281 */
3282 struct fc_vport *
3283 fc_vport_create(struct Scsi_Host *shost, int channel,
3284 struct fc_vport_identifiers *ids)
3285 {
3286 int stat;
3287 struct fc_vport *vport;
3288
3289 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3290 ids, &vport);
3291 return stat ? NULL : vport;
3292 }
3293 EXPORT_SYMBOL(fc_vport_create);
3294
3295 /**
3296 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3297 * @vport: fc_vport to be terminated
3298 *
3299 * Calls the LLDD vport_delete() function, then deallocates and removes
3300 * the vport from the shost and object tree.
3301 *
3302 * Notes:
3303 * This routine assumes no locks are held on entry.
3304 */
3305 int
3306 fc_vport_terminate(struct fc_vport *vport)
3307 {
3308 struct Scsi_Host *shost = vport_to_shost(vport);
3309 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3310 struct fc_internal *i = to_fc_internal(shost->transportt);
3311 struct device *dev = &vport->dev;
3312 unsigned long flags;
3313 int stat;
3314
3315 spin_lock_irqsave(shost->host_lock, flags);
3316 if (vport->flags & FC_VPORT_CREATING) {
3317 spin_unlock_irqrestore(shost->host_lock, flags);
3318 return -EBUSY;
3319 }
3320 if (vport->flags & (FC_VPORT_DEL)) {
3321 spin_unlock_irqrestore(shost->host_lock, flags);
3322 return -EALREADY;
3323 }
3324 vport->flags |= FC_VPORT_DELETING;
3325 spin_unlock_irqrestore(shost->host_lock, flags);
3326
3327 if (i->f->vport_delete)
3328 stat = i->f->vport_delete(vport);
3329 else
3330 stat = -ENOENT;
3331
3332 spin_lock_irqsave(shost->host_lock, flags);
3333 vport->flags &= ~FC_VPORT_DELETING;
3334 if (!stat) {
3335 vport->flags |= FC_VPORT_DELETED;
3336 list_del(&vport->peers);
3337 fc_host->npiv_vports_inuse--;
3338 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3339 }
3340 spin_unlock_irqrestore(shost->host_lock, flags);
3341
3342 if (stat)
3343 return stat;
3344
3345 if (dev->parent != &shost->shost_gendev)
3346 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3347 transport_remove_device(dev);
3348 device_del(dev);
3349 transport_destroy_device(dev);
3350
3351 /*
3352 * Removing our self-reference should mean our
3353 * release function gets called, which will drop the remaining
3354 * parent reference and free the data structure.
3355 */
3356 put_device(dev); /* for self-reference */
3357
3358 return 0; /* SUCCESS */
3359 }
3360 EXPORT_SYMBOL(fc_vport_terminate);
3361
3362 /**
3363 * fc_vport_sched_delete - workq-based delete request for a vport
3364 * @work: vport to be deleted.
3365 */
3366 static void
3367 fc_vport_sched_delete(struct work_struct *work)
3368 {
3369 struct fc_vport *vport =
3370 container_of(work, struct fc_vport, vport_delete_work);
3371 int stat;
3372
3373 stat = fc_vport_terminate(vport);
3374 if (stat)
3375 dev_printk(KERN_ERR, vport->dev.parent,
3376 "%s: %s could not be deleted created via "
3377 "shost%d channel %d - error %d\n", __func__,
3378 dev_name(&vport->dev), vport->shost->host_no,
3379 vport->channel, stat);
3380 }
3381
3382
3383 /*
3384 * BSG support
3385 */
3386
3387
3388 /**
3389 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3390 * @job: fc_bsg_job that is to be torn down
3391 */
3392 static void
3393 fc_destroy_bsgjob(struct fc_bsg_job *job)
3394 {
3395 unsigned long flags;
3396
3397 spin_lock_irqsave(&job->job_lock, flags);
3398 if (job->ref_cnt) {
3399 spin_unlock_irqrestore(&job->job_lock, flags);
3400 return;
3401 }
3402 spin_unlock_irqrestore(&job->job_lock, flags);
3403
3404 put_device(job->dev); /* release reference for the request */
3405
3406 kfree(job->request_payload.sg_list);
3407 kfree(job->reply_payload.sg_list);
3408 kfree(job);
3409 }
3410
3411 /**
3412 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3413 * completed
3414 * @job: fc_bsg_job that is complete
3415 */
3416 static void
3417 fc_bsg_jobdone(struct fc_bsg_job *job)
3418 {
3419 struct request *req = job->req;
3420 struct request *rsp = req->next_rq;
3421 int err;
3422
3423 err = job->req->errors = job->reply->result;
3424
3425 if (err < 0)
3426 /* we're only returning the result field in the reply */
3427 job->req->sense_len = sizeof(uint32_t);
3428 else
3429 job->req->sense_len = job->reply_len;
3430
3431 /* we assume all request payload was transferred, residual == 0 */
3432 req->resid_len = 0;
3433
3434 if (rsp) {
3435 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3436
3437 /* set reply (bidi) residual */
3438 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3439 rsp->resid_len);
3440 }
3441 blk_complete_request(req);
3442 }
3443
3444 /**
3445 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3446 * @req: BSG request that holds the job to be destroyed
3447 */
3448 static void fc_bsg_softirq_done(struct request *rq)
3449 {
3450 struct fc_bsg_job *job = rq->special;
3451 unsigned long flags;
3452
3453 spin_lock_irqsave(&job->job_lock, flags);
3454 job->state_flags |= FC_RQST_STATE_DONE;
3455 job->ref_cnt--;
3456 spin_unlock_irqrestore(&job->job_lock, flags);
3457
3458 blk_end_request_all(rq, rq->errors);
3459 fc_destroy_bsgjob(job);
3460 }
3461
3462 /**
3463 * fc_bsg_job_timeout - handler for when a bsg request timesout
3464 * @req: request that timed out
3465 */
3466 static enum blk_eh_timer_return
3467 fc_bsg_job_timeout(struct request *req)
3468 {
3469 struct fc_bsg_job *job = (void *) req->special;
3470 struct Scsi_Host *shost = job->shost;
3471 struct fc_internal *i = to_fc_internal(shost->transportt);
3472 unsigned long flags;
3473 int err = 0, done = 0;
3474
3475 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3476 return BLK_EH_RESET_TIMER;
3477
3478 spin_lock_irqsave(&job->job_lock, flags);
3479 if (job->state_flags & FC_RQST_STATE_DONE)
3480 done = 1;
3481 else
3482 job->ref_cnt++;
3483 spin_unlock_irqrestore(&job->job_lock, flags);
3484
3485 if (!done && i->f->bsg_timeout) {
3486 /* call LLDD to abort the i/o as it has timed out */
3487 err = i->f->bsg_timeout(job);
3488 if (err)
3489 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3490 "abort failed with status %d\n", err);
3491 }
3492
3493 /* the blk_end_sync_io() doesn't check the error */
3494 if (done)
3495 return BLK_EH_NOT_HANDLED;
3496 else
3497 return BLK_EH_HANDLED;
3498 }
3499
3500 static int
3501 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3502 {
3503 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3504
3505 BUG_ON(!req->nr_phys_segments);
3506
3507 buf->sg_list = kzalloc(sz, GFP_KERNEL);
3508 if (!buf->sg_list)
3509 return -ENOMEM;
3510 sg_init_table(buf->sg_list, req->nr_phys_segments);
3511 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3512 buf->payload_len = blk_rq_bytes(req);
3513 return 0;
3514 }
3515
3516
3517 /**
3518 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3519 * bsg request
3520 * @shost: SCSI Host corresponding to the bsg object
3521 * @rport: (optional) FC Remote Port corresponding to the bsg object
3522 * @req: BSG request that needs a job structure
3523 */
3524 static int
3525 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3526 struct request *req)
3527 {
3528 struct fc_internal *i = to_fc_internal(shost->transportt);
3529 struct request *rsp = req->next_rq;
3530 struct fc_bsg_job *job;
3531 int ret;
3532
3533 BUG_ON(req->special);
3534
3535 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3536 GFP_KERNEL);
3537 if (!job)
3538 return -ENOMEM;
3539
3540 /*
3541 * Note: this is a bit silly.
3542 * The request gets formatted as a SGIO v4 ioctl request, which
3543 * then gets reformatted as a blk request, which then gets
3544 * reformatted as a fc bsg request. And on completion, we have
3545 * to wrap return results such that SGIO v4 thinks it was a scsi
3546 * status. I hope this was all worth it.
3547 */
3548
3549 req->special = job;
3550 job->shost = shost;
3551 job->rport = rport;
3552 job->req = req;
3553 if (i->f->dd_bsg_size)
3554 job->dd_data = (void *)&job[1];
3555 spin_lock_init(&job->job_lock);
3556 job->request = (struct fc_bsg_request *)req->cmd;
3557 job->request_len = req->cmd_len;
3558 job->reply = req->sense;
3559 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3560 * allocated */
3561 if (req->bio) {
3562 ret = fc_bsg_map_buffer(&job->request_payload, req);
3563 if (ret)
3564 goto failjob_rls_job;
3565 }
3566 if (rsp && rsp->bio) {
3567 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3568 if (ret)
3569 goto failjob_rls_rqst_payload;
3570 }
3571 job->job_done = fc_bsg_jobdone;
3572 if (rport)
3573 job->dev = &rport->dev;
3574 else
3575 job->dev = &shost->shost_gendev;
3576 get_device(job->dev); /* take a reference for the request */
3577
3578 job->ref_cnt = 1;
3579
3580 return 0;
3581
3582
3583 failjob_rls_rqst_payload:
3584 kfree(job->request_payload.sg_list);
3585 failjob_rls_job:
3586 kfree(job);
3587 return -ENOMEM;
3588 }
3589
3590
3591 enum fc_dispatch_result {
3592 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
3593 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
3594 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
3595 };
3596
3597
3598 /**
3599 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3600 * @shost: scsi host rport attached to
3601 * @job: bsg job to be processed
3602 */
3603 static enum fc_dispatch_result
3604 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3605 struct fc_bsg_job *job)
3606 {
3607 struct fc_internal *i = to_fc_internal(shost->transportt);
3608 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3609 int ret;
3610
3611 /* Validate the host command */
3612 switch (job->request->msgcode) {
3613 case FC_BSG_HST_ADD_RPORT:
3614 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3615 break;
3616
3617 case FC_BSG_HST_DEL_RPORT:
3618 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3619 break;
3620
3621 case FC_BSG_HST_ELS_NOLOGIN:
3622 cmdlen += sizeof(struct fc_bsg_host_els);
3623 /* there better be a xmt and rcv payloads */
3624 if ((!job->request_payload.payload_len) ||
3625 (!job->reply_payload.payload_len)) {
3626 ret = -EINVAL;
3627 goto fail_host_msg;
3628 }
3629 break;
3630
3631 case FC_BSG_HST_CT:
3632 cmdlen += sizeof(struct fc_bsg_host_ct);
3633 /* there better be xmt and rcv payloads */
3634 if ((!job->request_payload.payload_len) ||
3635 (!job->reply_payload.payload_len)) {
3636 ret = -EINVAL;
3637 goto fail_host_msg;
3638 }
3639 break;
3640
3641 case FC_BSG_HST_VENDOR:
3642 cmdlen += sizeof(struct fc_bsg_host_vendor);
3643 if ((shost->hostt->vendor_id == 0L) ||
3644 (job->request->rqst_data.h_vendor.vendor_id !=
3645 shost->hostt->vendor_id)) {
3646 ret = -ESRCH;
3647 goto fail_host_msg;
3648 }
3649 break;
3650
3651 default:
3652 ret = -EBADR;
3653 goto fail_host_msg;
3654 }
3655
3656 /* check if we really have all the request data needed */
3657 if (job->request_len < cmdlen) {
3658 ret = -ENOMSG;
3659 goto fail_host_msg;
3660 }
3661
3662 ret = i->f->bsg_request(job);
3663 if (!ret)
3664 return FC_DISPATCH_UNLOCKED;
3665
3666 fail_host_msg:
3667 /* return the errno failure code as the only status */
3668 BUG_ON(job->reply_len < sizeof(uint32_t));
3669 job->reply->result = ret;
3670 job->reply_len = sizeof(uint32_t);
3671 fc_bsg_jobdone(job);
3672 return FC_DISPATCH_UNLOCKED;
3673 }
3674
3675
3676 /*
3677 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3678 * @rport: rport to be restarted
3679 */
3680 static void
3681 fc_bsg_goose_queue(struct fc_rport *rport)
3682 {
3683 int flagset;
3684 unsigned long flags;
3685
3686 if (!rport->rqst_q)
3687 return;
3688
3689 get_device(&rport->dev);
3690
3691 spin_lock_irqsave(rport->rqst_q->queue_lock, flags);
3692 flagset = test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags) &&
3693 !test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags);
3694 if (flagset)
3695 queue_flag_set(QUEUE_FLAG_REENTER, rport->rqst_q);
3696 __blk_run_queue(rport->rqst_q);
3697 if (flagset)
3698 queue_flag_clear(QUEUE_FLAG_REENTER, rport->rqst_q);
3699 spin_unlock_irqrestore(rport->rqst_q->queue_lock, flags);
3700
3701 put_device(&rport->dev);
3702 }
3703
3704
3705 /**
3706 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3707 * @shost: scsi host rport attached to
3708 * @rport: rport request destined to
3709 * @job: bsg job to be processed
3710 */
3711 static enum fc_dispatch_result
3712 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3713 struct fc_rport *rport, struct fc_bsg_job *job)
3714 {
3715 struct fc_internal *i = to_fc_internal(shost->transportt);
3716 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3717 int ret;
3718
3719 /* Validate the rport command */
3720 switch (job->request->msgcode) {
3721 case FC_BSG_RPT_ELS:
3722 cmdlen += sizeof(struct fc_bsg_rport_els);
3723 goto check_bidi;
3724
3725 case FC_BSG_RPT_CT:
3726 cmdlen += sizeof(struct fc_bsg_rport_ct);
3727 check_bidi:
3728 /* there better be xmt and rcv payloads */
3729 if ((!job->request_payload.payload_len) ||
3730 (!job->reply_payload.payload_len)) {
3731 ret = -EINVAL;
3732 goto fail_rport_msg;
3733 }
3734 break;
3735 default:
3736 ret = -EBADR;
3737 goto fail_rport_msg;
3738 }
3739
3740 /* check if we really have all the request data needed */
3741 if (job->request_len < cmdlen) {
3742 ret = -ENOMSG;
3743 goto fail_rport_msg;
3744 }
3745
3746 ret = i->f->bsg_request(job);
3747 if (!ret)
3748 return FC_DISPATCH_UNLOCKED;
3749
3750 fail_rport_msg:
3751 /* return the errno failure code as the only status */
3752 BUG_ON(job->reply_len < sizeof(uint32_t));
3753 job->reply->result = ret;
3754 job->reply_len = sizeof(uint32_t);
3755 fc_bsg_jobdone(job);
3756 return FC_DISPATCH_UNLOCKED;
3757 }
3758
3759
3760 /**
3761 * fc_bsg_request_handler - generic handler for bsg requests
3762 * @q: request queue to manage
3763 * @shost: Scsi_Host related to the bsg object
3764 * @rport: FC remote port related to the bsg object (optional)
3765 * @dev: device structure for bsg object
3766 */
3767 static void
3768 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3769 struct fc_rport *rport, struct device *dev)
3770 {
3771 struct request *req;
3772 struct fc_bsg_job *job;
3773 enum fc_dispatch_result ret;
3774
3775 if (!get_device(dev))
3776 return;
3777
3778 while (!blk_queue_plugged(q)) {
3779 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED))
3780 break;
3781
3782 req = blk_fetch_request(q);
3783 if (!req)
3784 break;
3785
3786 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3787 req->errors = -ENXIO;
3788 spin_unlock_irq(q->queue_lock);
3789 blk_end_request(req, -ENXIO, blk_rq_bytes(req));
3790 spin_lock_irq(q->queue_lock);
3791 continue;
3792 }
3793
3794 spin_unlock_irq(q->queue_lock);
3795
3796 ret = fc_req_to_bsgjob(shost, rport, req);
3797 if (ret) {
3798 req->errors = ret;
3799 blk_end_request(req, ret, blk_rq_bytes(req));
3800 spin_lock_irq(q->queue_lock);
3801 continue;
3802 }
3803
3804 job = req->special;
3805
3806 /* check if we have the msgcode value at least */
3807 if (job->request_len < sizeof(uint32_t)) {
3808 BUG_ON(job->reply_len < sizeof(uint32_t));
3809 job->reply->result = -ENOMSG;
3810 job->reply_len = sizeof(uint32_t);
3811 fc_bsg_jobdone(job);
3812 spin_lock_irq(q->queue_lock);
3813 continue;
3814 }
3815
3816 /* the dispatch routines will unlock the queue_lock */
3817 if (rport)
3818 ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3819 else
3820 ret = fc_bsg_host_dispatch(q, shost, job);
3821
3822 /* did dispatcher hit state that can't process any more */
3823 if (ret == FC_DISPATCH_BREAK)
3824 break;
3825
3826 /* did dispatcher had released the lock */
3827 if (ret == FC_DISPATCH_UNLOCKED)
3828 spin_lock_irq(q->queue_lock);
3829 }
3830
3831 spin_unlock_irq(q->queue_lock);
3832 put_device(dev);
3833 spin_lock_irq(q->queue_lock);
3834 }
3835
3836
3837 /**
3838 * fc_bsg_host_handler - handler for bsg requests for a fc host
3839 * @q: fc host request queue
3840 */
3841 static void
3842 fc_bsg_host_handler(struct request_queue *q)
3843 {
3844 struct Scsi_Host *shost = q->queuedata;
3845
3846 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
3847 }
3848
3849
3850 /**
3851 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
3852 * @q: rport request queue
3853 */
3854 static void
3855 fc_bsg_rport_handler(struct request_queue *q)
3856 {
3857 struct fc_rport *rport = q->queuedata;
3858 struct Scsi_Host *shost = rport_to_shost(rport);
3859
3860 fc_bsg_request_handler(q, shost, rport, &rport->dev);
3861 }
3862
3863
3864 /**
3865 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3866 * @shost: shost for fc_host
3867 * @fc_host: fc_host adding the structures to
3868 */
3869 static int
3870 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3871 {
3872 struct device *dev = &shost->shost_gendev;
3873 struct fc_internal *i = to_fc_internal(shost->transportt);
3874 struct request_queue *q;
3875 int err;
3876 char bsg_name[20];
3877
3878 fc_host->rqst_q = NULL;
3879
3880 if (!i->f->bsg_request)
3881 return -ENOTSUPP;
3882
3883 snprintf(bsg_name, sizeof(bsg_name),
3884 "fc_host%d", shost->host_no);
3885
3886 q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
3887 if (!q) {
3888 printk(KERN_ERR "fc_host%d: bsg interface failed to "
3889 "initialize - no request queue\n",
3890 shost->host_no);
3891 return -ENOMEM;
3892 }
3893
3894 q->queuedata = shost;
3895 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
3896 blk_queue_softirq_done(q, fc_bsg_softirq_done);
3897 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3898 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
3899
3900 err = bsg_register_queue(q, dev, bsg_name, NULL);
3901 if (err) {
3902 printk(KERN_ERR "fc_host%d: bsg interface failed to "
3903 "initialize - register queue\n",
3904 shost->host_no);
3905 blk_cleanup_queue(q);
3906 return err;
3907 }
3908
3909 fc_host->rqst_q = q;
3910 return 0;
3911 }
3912
3913
3914 /**
3915 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
3916 * @shost: shost that rport is attached to
3917 * @rport: rport that the bsg hooks are being attached to
3918 */
3919 static int
3920 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
3921 {
3922 struct device *dev = &rport->dev;
3923 struct fc_internal *i = to_fc_internal(shost->transportt);
3924 struct request_queue *q;
3925 int err;
3926
3927 rport->rqst_q = NULL;
3928
3929 if (!i->f->bsg_request)
3930 return -ENOTSUPP;
3931
3932 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
3933 if (!q) {
3934 printk(KERN_ERR "%s: bsg interface failed to "
3935 "initialize - no request queue\n",
3936 dev->kobj.name);
3937 return -ENOMEM;
3938 }
3939
3940 q->queuedata = rport;
3941 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
3942 blk_queue_softirq_done(q, fc_bsg_softirq_done);
3943 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3944 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
3945
3946 err = bsg_register_queue(q, dev, NULL, NULL);
3947 if (err) {
3948 printk(KERN_ERR "%s: bsg interface failed to "
3949 "initialize - register queue\n",
3950 dev->kobj.name);
3951 blk_cleanup_queue(q);
3952 return err;
3953 }
3954
3955 rport->rqst_q = q;
3956 return 0;
3957 }
3958
3959
3960 /**
3961 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
3962 * @q: the request_queue that is to be torn down.
3963 */
3964 static void
3965 fc_bsg_remove(struct request_queue *q)
3966 {
3967 if (q) {
3968 bsg_unregister_queue(q);
3969 blk_cleanup_queue(q);
3970 }
3971 }
3972
3973
3974 /* Original Author: Martin Hicks */
3975 MODULE_AUTHOR("James Smart");
3976 MODULE_DESCRIPTION("FC Transport Attributes");
3977 MODULE_LICENSE("GPL");
3978
3979 module_init(fc_transport_init);
3980 module_exit(fc_transport_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree