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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / scsi / scsi_transport_fc.c
blobd7e470a061803673d3517d02e80912e2b145ab58
1 /*
2 * FiberChannel transport specific attributes exported to sysfs.
3 *
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * ========
21 *
22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
25 * Add vports, etc
26 *
27 */
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/delay.h>
32 #include <linux/kernel.h>
33 #include <scsi/scsi_device.h>
34 #include <scsi/scsi_host.h>
35 #include <scsi/scsi_transport.h>
36 #include <scsi/scsi_transport_fc.h>
37 #include <scsi/scsi_cmnd.h>
38 #include <linux/netlink.h>
39 #include <net/netlink.h>
40 #include <scsi/scsi_netlink_fc.h>
41 #include <scsi/scsi_bsg_fc.h>
42 #include "scsi_priv.h"
43 #include "scsi_transport_fc_internal.h"
44
45 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
46 static void fc_vport_sched_delete(struct work_struct *work);
47 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
48 struct device *pdev, struct fc_vport_identifiers *ids,
49 struct fc_vport **vport);
50 static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
51 static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
52 static void fc_bsg_remove(struct request_queue *);
53 static void fc_bsg_goose_queue(struct fc_rport *);
54
55 /*
56 * Redefine so that we can have same named attributes in the
57 * sdev/starget/host objects.
58 */
59 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
60 struct device_attribute device_attr_##_prefix##_##_name = \
61 __ATTR(_name,_mode,_show,_store)
62
63 #define fc_enum_name_search(title, table_type, table) \
64 static const char *get_fc_##title##_name(enum table_type table_key) \
65 { \
66 int i; \
67 char *name = NULL; \
68 \
69 for (i = 0; i < ARRAY_SIZE(table); i++) { \
70 if (table[i].value == table_key) { \
71 name = table[i].name; \
72 break; \
73 } \
74 } \
75 return name; \
76 }
77
78 #define fc_enum_name_match(title, table_type, table) \
79 static int get_fc_##title##_match(const char *table_key, \
80 enum table_type *value) \
81 { \
82 int i; \
83 \
84 for (i = 0; i < ARRAY_SIZE(table); i++) { \
85 if (strncmp(table_key, table[i].name, \
86 table[i].matchlen) == 0) { \
87 *value = table[i].value; \
88 return 0; /* success */ \
89 } \
90 } \
91 return 1; /* failure */ \
92 }
93
94
95 /* Convert fc_port_type values to ascii string name */
96 static struct {
97 enum fc_port_type value;
98 char *name;
99 } fc_port_type_names[] = {
100 { FC_PORTTYPE_UNKNOWN, "Unknown" },
101 { FC_PORTTYPE_OTHER, "Other" },
102 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
103 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
104 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
105 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
106 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection)" },
107 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
108 };
109 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
110 #define FC_PORTTYPE_MAX_NAMELEN 50
111
112 /* Reuse fc_port_type enum function for vport_type */
113 #define get_fc_vport_type_name get_fc_port_type_name
114
115
116 /* Convert fc_host_event_code values to ascii string name */
117 static const struct {
118 enum fc_host_event_code value;
119 char *name;
120 } fc_host_event_code_names[] = {
121 { FCH_EVT_LIP, "lip" },
122 { FCH_EVT_LINKUP, "link_up" },
123 { FCH_EVT_LINKDOWN, "link_down" },
124 { FCH_EVT_LIPRESET, "lip_reset" },
125 { FCH_EVT_RSCN, "rscn" },
126 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
127 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
128 { FCH_EVT_PORT_ONLINE, "port_online" },
129 { FCH_EVT_PORT_OFFLINE, "port_offline" },
130 { FCH_EVT_PORT_FABRIC, "port_fabric" },
131 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
132 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
133 };
134 fc_enum_name_search(host_event_code, fc_host_event_code,
135 fc_host_event_code_names)
136 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
137
138
139 /* Convert fc_port_state values to ascii string name */
140 static struct {
141 enum fc_port_state value;
142 char *name;
143 } fc_port_state_names[] = {
144 { FC_PORTSTATE_UNKNOWN, "Unknown" },
145 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
146 { FC_PORTSTATE_ONLINE, "Online" },
147 { FC_PORTSTATE_OFFLINE, "Offline" },
148 { FC_PORTSTATE_BLOCKED, "Blocked" },
149 { FC_PORTSTATE_BYPASSED, "Bypassed" },
150 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
151 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
152 { FC_PORTSTATE_ERROR, "Error" },
153 { FC_PORTSTATE_LOOPBACK, "Loopback" },
154 { FC_PORTSTATE_DELETED, "Deleted" },
155 };
156 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
157 #define FC_PORTSTATE_MAX_NAMELEN 20
158
159
160 /* Convert fc_vport_state values to ascii string name */
161 static struct {
162 enum fc_vport_state value;
163 char *name;
164 } fc_vport_state_names[] = {
165 { FC_VPORT_UNKNOWN, "Unknown" },
166 { FC_VPORT_ACTIVE, "Active" },
167 { FC_VPORT_DISABLED, "Disabled" },
168 { FC_VPORT_LINKDOWN, "Linkdown" },
169 { FC_VPORT_INITIALIZING, "Initializing" },
170 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
171 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
172 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
173 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
174 { FC_VPORT_FAILED, "VPort Failed" },
175 };
176 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
177 #define FC_VPORTSTATE_MAX_NAMELEN 24
178
179 /* Reuse fc_vport_state enum function for vport_last_state */
180 #define get_fc_vport_last_state_name get_fc_vport_state_name
181
182
183 /* Convert fc_tgtid_binding_type values to ascii string name */
184 static const struct {
185 enum fc_tgtid_binding_type value;
186 char *name;
187 int matchlen;
188 } fc_tgtid_binding_type_names[] = {
189 { FC_TGTID_BIND_NONE, "none", 4 },
190 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
191 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
192 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
193 };
194 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
195 fc_tgtid_binding_type_names)
196 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
197 fc_tgtid_binding_type_names)
198 #define FC_BINDTYPE_MAX_NAMELEN 30
199
200
201 #define fc_bitfield_name_search(title, table) \
202 static ssize_t \
203 get_fc_##title##_names(u32 table_key, char *buf) \
204 { \
205 char *prefix = ""; \
206 ssize_t len = 0; \
207 int i; \
208 \
209 for (i = 0; i < ARRAY_SIZE(table); i++) { \
210 if (table[i].value & table_key) { \
211 len += sprintf(buf + len, "%s%s", \
212 prefix, table[i].name); \
213 prefix = ", "; \
214 } \
215 } \
216 len += sprintf(buf + len, "\n"); \
217 return len; \
218 }
219
220
221 /* Convert FC_COS bit values to ascii string name */
222 static const struct {
223 u32 value;
224 char *name;
225 } fc_cos_names[] = {
226 { FC_COS_CLASS1, "Class 1" },
227 { FC_COS_CLASS2, "Class 2" },
228 { FC_COS_CLASS3, "Class 3" },
229 { FC_COS_CLASS4, "Class 4" },
230 { FC_COS_CLASS6, "Class 6" },
231 };
232 fc_bitfield_name_search(cos, fc_cos_names)
233
234
235 /* Convert FC_PORTSPEED bit values to ascii string name */
236 static const struct {
237 u32 value;
238 char *name;
239 } fc_port_speed_names[] = {
240 { FC_PORTSPEED_1GBIT, "1 Gbit" },
241 { FC_PORTSPEED_2GBIT, "2 Gbit" },
242 { FC_PORTSPEED_4GBIT, "4 Gbit" },
243 { FC_PORTSPEED_10GBIT, "10 Gbit" },
244 { FC_PORTSPEED_8GBIT, "8 Gbit" },
245 { FC_PORTSPEED_16GBIT, "16 Gbit" },
246 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
247 };
248 fc_bitfield_name_search(port_speed, fc_port_speed_names)
249
250
251 static int
252 show_fc_fc4s (char *buf, u8 *fc4_list)
253 {
254 int i, len=0;
255
256 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
257 len += sprintf(buf + len , "0x%02x ", *fc4_list);
258 len += sprintf(buf + len, "\n");
259 return len;
260 }
261
262
263 /* Convert FC_PORT_ROLE bit values to ascii string name */
264 static const struct {
265 u32 value;
266 char *name;
267 } fc_port_role_names[] = {
268 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
269 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
270 { FC_PORT_ROLE_IP_PORT, "IP Port" },
271 };
272 fc_bitfield_name_search(port_roles, fc_port_role_names)
273
274 /*
275 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
276 */
277 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
278 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
279 #define FC_FPORT_PORTID 0x00000e
280 #define FC_FABCTLR_PORTID 0x00000d
281 #define FC_DIRSRVR_PORTID 0x00000c
282 #define FC_TIMESRVR_PORTID 0x00000b
283 #define FC_MGMTSRVR_PORTID 0x00000a
284
285
286 static void fc_timeout_deleted_rport(struct work_struct *work);
287 static void fc_timeout_fail_rport_io(struct work_struct *work);
288 static void fc_scsi_scan_rport(struct work_struct *work);
289
290 /*
291 * Attribute counts pre object type...
292 * Increase these values if you add attributes
293 */
294 #define FC_STARGET_NUM_ATTRS 3
295 #define FC_RPORT_NUM_ATTRS 10
296 #define FC_VPORT_NUM_ATTRS 9
297 #define FC_HOST_NUM_ATTRS 22
298
299 struct fc_internal {
300 struct scsi_transport_template t;
301 struct fc_function_template *f;
302
303 /*
304 * For attributes : each object has :
305 * An array of the actual attributes structures
306 * An array of null-terminated pointers to the attribute
307 * structures - used for mid-layer interaction.
308 *
309 * The attribute containers for the starget and host are are
310 * part of the midlayer. As the remote port is specific to the
311 * fc transport, we must provide the attribute container.
312 */
313 struct device_attribute private_starget_attrs[
314 FC_STARGET_NUM_ATTRS];
315 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
316
317 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
318 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
319
320 struct transport_container rport_attr_cont;
321 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
322 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
323
324 struct transport_container vport_attr_cont;
325 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
326 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
327 };
328
329 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
330
331 static int fc_target_setup(struct transport_container *tc, struct device *dev,
332 struct device *cdev)
333 {
334 struct scsi_target *starget = to_scsi_target(dev);
335 struct fc_rport *rport = starget_to_rport(starget);
336
337 /*
338 * if parent is remote port, use values from remote port.
339 * Otherwise, this host uses the fc_transport, but not the
340 * remote port interface. As such, initialize to known non-values.
341 */
342 if (rport) {
343 fc_starget_node_name(starget) = rport->node_name;
344 fc_starget_port_name(starget) = rport->port_name;
345 fc_starget_port_id(starget) = rport->port_id;
346 } else {
347 fc_starget_node_name(starget) = -1;
348 fc_starget_port_name(starget) = -1;
349 fc_starget_port_id(starget) = -1;
350 }
351
352 return 0;
353 }
354
355 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
356 "fc_transport",
357 fc_target_setup,
358 NULL,
359 NULL);
360
361 static int fc_host_setup(struct transport_container *tc, struct device *dev,
362 struct device *cdev)
363 {
364 struct Scsi_Host *shost = dev_to_shost(dev);
365 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
366
367 /*
368 * Set default values easily detected by the midlayer as
369 * failure cases. The scsi lldd is responsible for initializing
370 * all transport attributes to valid values per host.
371 */
372 fc_host->node_name = -1;
373 fc_host->port_name = -1;
374 fc_host->permanent_port_name = -1;
375 fc_host->supported_classes = FC_COS_UNSPECIFIED;
376 memset(fc_host->supported_fc4s, 0,
377 sizeof(fc_host->supported_fc4s));
378 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
379 fc_host->maxframe_size = -1;
380 fc_host->max_npiv_vports = 0;
381 memset(fc_host->serial_number, 0,
382 sizeof(fc_host->serial_number));
383
384 fc_host->port_id = -1;
385 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
386 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
387 memset(fc_host->active_fc4s, 0,
388 sizeof(fc_host->active_fc4s));
389 fc_host->speed = FC_PORTSPEED_UNKNOWN;
390 fc_host->fabric_name = -1;
391 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
392 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
393
394 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
395
396 INIT_LIST_HEAD(&fc_host->rports);
397 INIT_LIST_HEAD(&fc_host->rport_bindings);
398 INIT_LIST_HEAD(&fc_host->vports);
399 fc_host->next_rport_number = 0;
400 fc_host->next_target_id = 0;
401 fc_host->next_vport_number = 0;
402 fc_host->npiv_vports_inuse = 0;
403
404 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
405 "fc_wq_%d", shost->host_no);
406 fc_host->work_q = create_singlethread_workqueue(
407 fc_host->work_q_name);
408 if (!fc_host->work_q)
409 return -ENOMEM;
410
411 snprintf(fc_host->devloss_work_q_name,
412 sizeof(fc_host->devloss_work_q_name),
413 "fc_dl_%d", shost->host_no);
414 fc_host->devloss_work_q = create_singlethread_workqueue(
415 fc_host->devloss_work_q_name);
416 if (!fc_host->devloss_work_q) {
417 destroy_workqueue(fc_host->work_q);
418 fc_host->work_q = NULL;
419 return -ENOMEM;
420 }
421
422 fc_bsg_hostadd(shost, fc_host);
423 /* ignore any bsg add error - we just can't do sgio */
424
425 return 0;
426 }
427
428 static int fc_host_remove(struct transport_container *tc, struct device *dev,
429 struct device *cdev)
430 {
431 struct Scsi_Host *shost = dev_to_shost(dev);
432 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
433
434 fc_bsg_remove(fc_host->rqst_q);
435 return 0;
436 }
437
438 static DECLARE_TRANSPORT_CLASS(fc_host_class,
439 "fc_host",
440 fc_host_setup,
441 fc_host_remove,
442 NULL);
443
444 /*
445 * Setup and Remove actions for remote ports are handled
446 * in the service functions below.
447 */
448 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
449 "fc_remote_ports",
450 NULL,
451 NULL,
452 NULL);
453
454 /*
455 * Setup and Remove actions for virtual ports are handled
456 * in the service functions below.
457 */
458 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
459 "fc_vports",
460 NULL,
461 NULL,
462 NULL);
463
464 /*
465 * Module Parameters
466 */
467
468 /*
469 * dev_loss_tmo: the default number of seconds that the FC transport
470 * should insulate the loss of a remote port.
471 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
472 */
473 static unsigned int fc_dev_loss_tmo = 60; /* seconds */
474
475 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
476 MODULE_PARM_DESC(dev_loss_tmo,
477 "Maximum number of seconds that the FC transport should"
478 " insulate the loss of a remote port. Once this value is"
479 " exceeded, the scsi target is removed. Value should be"
480 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
481 " fast_io_fail_tmo is not set.");
482
483 /*
484 * Netlink Infrastructure
485 */
486
487 static atomic_t fc_event_seq;
488
489 /**
490 * fc_get_event_number - Obtain the next sequential FC event number
491 *
492 * Notes:
493 * We could have inlined this, but it would have required fc_event_seq to
494 * be exposed. For now, live with the subroutine call.
495 * Atomic used to avoid lock/unlock...
496 */
497 u32
498 fc_get_event_number(void)
499 {
500 return atomic_add_return(1, &fc_event_seq);
501 }
502 EXPORT_SYMBOL(fc_get_event_number);
503
504
505 /**
506 * fc_host_post_event - called to post an even on an fc_host.
507 * @shost: host the event occurred on
508 * @event_number: fc event number obtained from get_fc_event_number()
509 * @event_code: fc_host event being posted
510 * @event_data: 32bits of data for the event being posted
511 *
512 * Notes:
513 * This routine assumes no locks are held on entry.
514 */
515 void
516 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
517 enum fc_host_event_code event_code, u32 event_data)
518 {
519 struct sk_buff *skb;
520 struct nlmsghdr *nlh;
521 struct fc_nl_event *event;
522 const char *name;
523 u32 len, skblen;
524 int err;
525
526 if (!scsi_nl_sock) {
527 err = -ENOENT;
528 goto send_fail;
529 }
530
531 len = FC_NL_MSGALIGN(sizeof(*event));
532 skblen = NLMSG_SPACE(len);
533
534 skb = alloc_skb(skblen, GFP_KERNEL);
535 if (!skb) {
536 err = -ENOBUFS;
537 goto send_fail;
538 }
539
540 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
541 skblen - sizeof(*nlh), 0);
542 if (!nlh) {
543 err = -ENOBUFS;
544 goto send_fail_skb;
545 }
546 event = NLMSG_DATA(nlh);
547
548 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
549 FC_NL_ASYNC_EVENT, len);
550 event->seconds = get_seconds();
551 event->vendor_id = 0;
552 event->host_no = shost->host_no;
553 event->event_datalen = sizeof(u32); /* bytes */
554 event->event_num = event_number;
555 event->event_code = event_code;
556 event->event_data = event_data;
557
558 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
559 GFP_KERNEL);
560 return;
561
562 send_fail_skb:
563 kfree_skb(skb);
564 send_fail:
565 name = get_fc_host_event_code_name(event_code);
566 printk(KERN_WARNING
567 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
568 __func__, shost->host_no,
569 (name) ? name : "<unknown>", event_data, err);
570 return;
571 }
572 EXPORT_SYMBOL(fc_host_post_event);
573
574
575 /**
576 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
577 * @shost: host the event occurred on
578 * @event_number: fc event number obtained from get_fc_event_number()
579 * @data_len: amount, in bytes, of vendor unique data
580 * @data_buf: pointer to vendor unique data
581 * @vendor_id: Vendor id
582 *
583 * Notes:
584 * This routine assumes no locks are held on entry.
585 */
586 void
587 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
588 u32 data_len, char * data_buf, u64 vendor_id)
589 {
590 struct sk_buff *skb;
591 struct nlmsghdr *nlh;
592 struct fc_nl_event *event;
593 u32 len, skblen;
594 int err;
595
596 if (!scsi_nl_sock) {
597 err = -ENOENT;
598 goto send_vendor_fail;
599 }
600
601 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
602 skblen = NLMSG_SPACE(len);
603
604 skb = alloc_skb(skblen, GFP_KERNEL);
605 if (!skb) {
606 err = -ENOBUFS;
607 goto send_vendor_fail;
608 }
609
610 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
611 skblen - sizeof(*nlh), 0);
612 if (!nlh) {
613 err = -ENOBUFS;
614 goto send_vendor_fail_skb;
615 }
616 event = NLMSG_DATA(nlh);
617
618 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
619 FC_NL_ASYNC_EVENT, len);
620 event->seconds = get_seconds();
621 event->vendor_id = vendor_id;
622 event->host_no = shost->host_no;
623 event->event_datalen = data_len; /* bytes */
624 event->event_num = event_number;
625 event->event_code = FCH_EVT_VENDOR_UNIQUE;
626 memcpy(&event->event_data, data_buf, data_len);
627
628 nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
629 GFP_KERNEL);
630 return;
631
632 send_vendor_fail_skb:
633 kfree_skb(skb);
634 send_vendor_fail:
635 printk(KERN_WARNING
636 "%s: Dropped Event : host %d vendor_unique - err %d\n",
637 __func__, shost->host_no, err);
638 return;
639 }
640 EXPORT_SYMBOL(fc_host_post_vendor_event);
641
642
643
644 static __init int fc_transport_init(void)
645 {
646 int error;
647
648 atomic_set(&fc_event_seq, 0);
649
650 error = transport_class_register(&fc_host_class);
651 if (error)
652 return error;
653 error = transport_class_register(&fc_vport_class);
654 if (error)
655 goto unreg_host_class;
656 error = transport_class_register(&fc_rport_class);
657 if (error)
658 goto unreg_vport_class;
659 error = transport_class_register(&fc_transport_class);
660 if (error)
661 goto unreg_rport_class;
662 return 0;
663
664 unreg_rport_class:
665 transport_class_unregister(&fc_rport_class);
666 unreg_vport_class:
667 transport_class_unregister(&fc_vport_class);
668 unreg_host_class:
669 transport_class_unregister(&fc_host_class);
670 return error;
671 }
672
673 static void __exit fc_transport_exit(void)
674 {
675 transport_class_unregister(&fc_transport_class);
676 transport_class_unregister(&fc_rport_class);
677 transport_class_unregister(&fc_host_class);
678 transport_class_unregister(&fc_vport_class);
679 }
680
681 /*
682 * FC Remote Port Attribute Management
683 */
684
685 #define fc_rport_show_function(field, format_string, sz, cast) \
686 static ssize_t \
687 show_fc_rport_##field (struct device *dev, \
688 struct device_attribute *attr, char *buf) \
689 { \
690 struct fc_rport *rport = transport_class_to_rport(dev); \
691 struct Scsi_Host *shost = rport_to_shost(rport); \
692 struct fc_internal *i = to_fc_internal(shost->transportt); \
693 if ((i->f->get_rport_##field) && \
694 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
695 (rport->port_state == FC_PORTSTATE_DELETED) || \
696 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
697 i->f->get_rport_##field(rport); \
698 return snprintf(buf, sz, format_string, cast rport->field); \
699 }
700
701 #define fc_rport_store_function(field) \
702 static ssize_t \
703 store_fc_rport_##field(struct device *dev, \
704 struct device_attribute *attr, \
705 const char *buf, size_t count) \
706 { \
707 int val; \
708 struct fc_rport *rport = transport_class_to_rport(dev); \
709 struct Scsi_Host *shost = rport_to_shost(rport); \
710 struct fc_internal *i = to_fc_internal(shost->transportt); \
711 char *cp; \
712 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
713 (rport->port_state == FC_PORTSTATE_DELETED) || \
714 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
715 return -EBUSY; \
716 val = simple_strtoul(buf, &cp, 0); \
717 if (*cp && (*cp != '\n')) \
718 return -EINVAL; \
719 i->f->set_rport_##field(rport, val); \
720 return count; \
721 }
722
723 #define fc_rport_rd_attr(field, format_string, sz) \
724 fc_rport_show_function(field, format_string, sz, ) \
725 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
726 show_fc_rport_##field, NULL)
727
728 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
729 fc_rport_show_function(field, format_string, sz, (cast)) \
730 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
731 show_fc_rport_##field, NULL)
732
733 #define fc_rport_rw_attr(field, format_string, sz) \
734 fc_rport_show_function(field, format_string, sz, ) \
735 fc_rport_store_function(field) \
736 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
737 show_fc_rport_##field, \
738 store_fc_rport_##field)
739
740
741 #define fc_private_rport_show_function(field, format_string, sz, cast) \
742 static ssize_t \
743 show_fc_rport_##field (struct device *dev, \
744 struct device_attribute *attr, char *buf) \
745 { \
746 struct fc_rport *rport = transport_class_to_rport(dev); \
747 return snprintf(buf, sz, format_string, cast rport->field); \
748 }
749
750 #define fc_private_rport_rd_attr(field, format_string, sz) \
751 fc_private_rport_show_function(field, format_string, sz, ) \
752 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
753 show_fc_rport_##field, NULL)
754
755 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
756 fc_private_rport_show_function(field, format_string, sz, (cast)) \
757 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
758 show_fc_rport_##field, NULL)
759
760
761 #define fc_private_rport_rd_enum_attr(title, maxlen) \
762 static ssize_t \
763 show_fc_rport_##title (struct device *dev, \
764 struct device_attribute *attr, char *buf) \
765 { \
766 struct fc_rport *rport = transport_class_to_rport(dev); \
767 const char *name; \
768 name = get_fc_##title##_name(rport->title); \
769 if (!name) \
770 return -EINVAL; \
771 return snprintf(buf, maxlen, "%s\n", name); \
772 } \
773 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
774 show_fc_rport_##title, NULL)
775
776
777 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
778 i->private_rport_attrs[count] = device_attr_rport_##field; \
779 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
780 i->private_rport_attrs[count].store = NULL; \
781 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
782 if (i->f->show_rport_##field) \
783 count++
784
785 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
786 i->private_rport_attrs[count] = device_attr_rport_##field; \
787 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
788 i->private_rport_attrs[count].store = NULL; \
789 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
790 count++
791
792 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
793 i->private_rport_attrs[count] = device_attr_rport_##field; \
794 if (!i->f->set_rport_##field) { \
795 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
796 i->private_rport_attrs[count].store = NULL; \
797 } \
798 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
799 if (i->f->show_rport_##field) \
800 count++
801
802 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
803 { \
804 i->private_rport_attrs[count] = device_attr_rport_##field; \
805 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
806 count++; \
807 }
808
809
810 /* The FC Transport Remote Port Attributes: */
811
812 /* Fixed Remote Port Attributes */
813
814 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
815
816 static ssize_t
817 show_fc_rport_supported_classes (struct device *dev,
818 struct device_attribute *attr, char *buf)
819 {
820 struct fc_rport *rport = transport_class_to_rport(dev);
821 if (rport->supported_classes == FC_COS_UNSPECIFIED)
822 return snprintf(buf, 20, "unspecified\n");
823 return get_fc_cos_names(rport->supported_classes, buf);
824 }
825 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
826 show_fc_rport_supported_classes, NULL);
827
828 /* Dynamic Remote Port Attributes */
829
830 /*
831 * dev_loss_tmo attribute
832 */
833 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
834 static ssize_t
835 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
836 const char *buf, size_t count)
837 {
838 unsigned long val;
839 struct fc_rport *rport = transport_class_to_rport(dev);
840 struct Scsi_Host *shost = rport_to_shost(rport);
841 struct fc_internal *i = to_fc_internal(shost->transportt);
842 char *cp;
843 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
844 (rport->port_state == FC_PORTSTATE_DELETED) ||
845 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
846 return -EBUSY;
847 val = simple_strtoul(buf, &cp, 0);
848 if ((*cp && (*cp != '\n')) || (val < 0))
849 return -EINVAL;
850
851 /*
852 * Check for overflow; dev_loss_tmo is u32
853 */
854 if (val > UINT_MAX)
855 return -EINVAL;
856
857 /*
858 * If fast_io_fail is off we have to cap
859 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
860 */
861 if (rport->fast_io_fail_tmo == -1 &&
862 val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
863 return -EINVAL;
864
865 i->f->set_rport_dev_loss_tmo(rport, val);
866 return count;
867 }
868 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
869 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
870
871
872 /* Private Remote Port Attributes */
873
874 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
875 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
876 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
877
878 static ssize_t
879 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
880 char *buf)
881 {
882 struct fc_rport *rport = transport_class_to_rport(dev);
883
884 /* identify any roles that are port_id specific */
885 if ((rport->port_id != -1) &&
886 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
887 FC_WELLKNOWN_PORTID_MASK) {
888 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
889 case FC_FPORT_PORTID:
890 return snprintf(buf, 30, "Fabric Port\n");
891 case FC_FABCTLR_PORTID:
892 return snprintf(buf, 30, "Fabric Controller\n");
893 case FC_DIRSRVR_PORTID:
894 return snprintf(buf, 30, "Directory Server\n");
895 case FC_TIMESRVR_PORTID:
896 return snprintf(buf, 30, "Time Server\n");
897 case FC_MGMTSRVR_PORTID:
898 return snprintf(buf, 30, "Management Server\n");
899 default:
900 return snprintf(buf, 30, "Unknown Fabric Entity\n");
901 }
902 } else {
903 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
904 return snprintf(buf, 20, "unknown\n");
905 return get_fc_port_roles_names(rport->roles, buf);
906 }
907 }
908 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
909 show_fc_rport_roles, NULL);
910
911 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
912 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
913
914 /*
915 * fast_io_fail_tmo attribute
916 */
917 static ssize_t
918 show_fc_rport_fast_io_fail_tmo (struct device *dev,
919 struct device_attribute *attr, char *buf)
920 {
921 struct fc_rport *rport = transport_class_to_rport(dev);
922
923 if (rport->fast_io_fail_tmo == -1)
924 return snprintf(buf, 5, "off\n");
925 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
926 }
927
928 static ssize_t
929 store_fc_rport_fast_io_fail_tmo(struct device *dev,
930 struct device_attribute *attr, const char *buf,
931 size_t count)
932 {
933 int val;
934 char *cp;
935 struct fc_rport *rport = transport_class_to_rport(dev);
936
937 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
938 (rport->port_state == FC_PORTSTATE_DELETED) ||
939 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
940 return -EBUSY;
941 if (strncmp(buf, "off", 3) == 0)
942 rport->fast_io_fail_tmo = -1;
943 else {
944 val = simple_strtoul(buf, &cp, 0);
945 if ((*cp && (*cp != '\n')) || (val < 0))
946 return -EINVAL;
947 /*
948 * Cap fast_io_fail by dev_loss_tmo or
949 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
950 */
951 if ((val >= rport->dev_loss_tmo) ||
952 (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
953 return -EINVAL;
954
955 rport->fast_io_fail_tmo = val;
956 }
957 return count;
958 }
959 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
960 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
961
962
963 /*
964 * FC SCSI Target Attribute Management
965 */
966
967 /*
968 * Note: in the target show function we recognize when the remote
969 * port is in the hierarchy and do not allow the driver to get
970 * involved in sysfs functions. The driver only gets involved if
971 * it's the "old" style that doesn't use rports.
972 */
973 #define fc_starget_show_function(field, format_string, sz, cast) \
974 static ssize_t \
975 show_fc_starget_##field (struct device *dev, \
976 struct device_attribute *attr, char *buf) \
977 { \
978 struct scsi_target *starget = transport_class_to_starget(dev); \
979 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
980 struct fc_internal *i = to_fc_internal(shost->transportt); \
981 struct fc_rport *rport = starget_to_rport(starget); \
982 if (rport) \
983 fc_starget_##field(starget) = rport->field; \
984 else if (i->f->get_starget_##field) \
985 i->f->get_starget_##field(starget); \
986 return snprintf(buf, sz, format_string, \
987 cast fc_starget_##field(starget)); \
988 }
989
990 #define fc_starget_rd_attr(field, format_string, sz) \
991 fc_starget_show_function(field, format_string, sz, ) \
992 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
993 show_fc_starget_##field, NULL)
994
995 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
996 fc_starget_show_function(field, format_string, sz, (cast)) \
997 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
998 show_fc_starget_##field, NULL)
999
1000 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
1001 i->private_starget_attrs[count] = device_attr_starget_##field; \
1002 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1003 i->private_starget_attrs[count].store = NULL; \
1004 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1005 if (i->f->show_starget_##field) \
1006 count++
1007
1008 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
1009 i->private_starget_attrs[count] = device_attr_starget_##field; \
1010 if (!i->f->set_starget_##field) { \
1011 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
1012 i->private_starget_attrs[count].store = NULL; \
1013 } \
1014 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
1015 if (i->f->show_starget_##field) \
1016 count++
1017
1018 /* The FC Transport SCSI Target Attributes: */
1019 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1020 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1021 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
1022
1023
1024 /*
1025 * FC Virtual Port Attribute Management
1026 */
1027
1028 #define fc_vport_show_function(field, format_string, sz, cast) \
1029 static ssize_t \
1030 show_fc_vport_##field (struct device *dev, \
1031 struct device_attribute *attr, char *buf) \
1032 { \
1033 struct fc_vport *vport = transport_class_to_vport(dev); \
1034 struct Scsi_Host *shost = vport_to_shost(vport); \
1035 struct fc_internal *i = to_fc_internal(shost->transportt); \
1036 if ((i->f->get_vport_##field) && \
1037 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
1038 i->f->get_vport_##field(vport); \
1039 return snprintf(buf, sz, format_string, cast vport->field); \
1040 }
1041
1042 #define fc_vport_store_function(field) \
1043 static ssize_t \
1044 store_fc_vport_##field(struct device *dev, \
1045 struct device_attribute *attr, \
1046 const char *buf, size_t count) \
1047 { \
1048 int val; \
1049 struct fc_vport *vport = transport_class_to_vport(dev); \
1050 struct Scsi_Host *shost = vport_to_shost(vport); \
1051 struct fc_internal *i = to_fc_internal(shost->transportt); \
1052 char *cp; \
1053 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1054 return -EBUSY; \
1055 val = simple_strtoul(buf, &cp, 0); \
1056 if (*cp && (*cp != '\n')) \
1057 return -EINVAL; \
1058 i->f->set_vport_##field(vport, val); \
1059 return count; \
1060 }
1061
1062 #define fc_vport_store_str_function(field, slen) \
1063 static ssize_t \
1064 store_fc_vport_##field(struct device *dev, \
1065 struct device_attribute *attr, \
1066 const char *buf, size_t count) \
1067 { \
1068 struct fc_vport *vport = transport_class_to_vport(dev); \
1069 struct Scsi_Host *shost = vport_to_shost(vport); \
1070 struct fc_internal *i = to_fc_internal(shost->transportt); \
1071 unsigned int cnt=count; \
1072 \
1073 /* count may include a LF at end of string */ \
1074 if (buf[cnt-1] == '\n') \
1075 cnt--; \
1076 if (cnt > ((slen) - 1)) \
1077 return -EINVAL; \
1078 memcpy(vport->field, buf, cnt); \
1079 i->f->set_vport_##field(vport); \
1080 return count; \
1081 }
1082
1083 #define fc_vport_rd_attr(field, format_string, sz) \
1084 fc_vport_show_function(field, format_string, sz, ) \
1085 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1086 show_fc_vport_##field, NULL)
1087
1088 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1089 fc_vport_show_function(field, format_string, sz, (cast)) \
1090 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1091 show_fc_vport_##field, NULL)
1092
1093 #define fc_vport_rw_attr(field, format_string, sz) \
1094 fc_vport_show_function(field, format_string, sz, ) \
1095 fc_vport_store_function(field) \
1096 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1097 show_fc_vport_##field, \
1098 store_fc_vport_##field)
1099
1100 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1101 static ssize_t \
1102 show_fc_vport_##field (struct device *dev, \
1103 struct device_attribute *attr, char *buf) \
1104 { \
1105 struct fc_vport *vport = transport_class_to_vport(dev); \
1106 return snprintf(buf, sz, format_string, cast vport->field); \
1107 }
1108
1109 #define fc_private_vport_store_u32_function(field) \
1110 static ssize_t \
1111 store_fc_vport_##field(struct device *dev, \
1112 struct device_attribute *attr, \
1113 const char *buf, size_t count) \
1114 { \
1115 u32 val; \
1116 struct fc_vport *vport = transport_class_to_vport(dev); \
1117 char *cp; \
1118 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1119 return -EBUSY; \
1120 val = simple_strtoul(buf, &cp, 0); \
1121 if (*cp && (*cp != '\n')) \
1122 return -EINVAL; \
1123 vport->field = val; \
1124 return count; \
1125 }
1126
1127
1128 #define fc_private_vport_rd_attr(field, format_string, sz) \
1129 fc_private_vport_show_function(field, format_string, sz, ) \
1130 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1131 show_fc_vport_##field, NULL)
1132
1133 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1134 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1135 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1136 show_fc_vport_##field, NULL)
1137
1138 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1139 fc_private_vport_show_function(field, format_string, sz, ) \
1140 fc_private_vport_store_u32_function(field) \
1141 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1142 show_fc_vport_##field, \
1143 store_fc_vport_##field)
1144
1145
1146 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1147 static ssize_t \
1148 show_fc_vport_##title (struct device *dev, \
1149 struct device_attribute *attr, \
1150 char *buf) \
1151 { \
1152 struct fc_vport *vport = transport_class_to_vport(dev); \
1153 const char *name; \
1154 name = get_fc_##title##_name(vport->title); \
1155 if (!name) \
1156 return -EINVAL; \
1157 return snprintf(buf, maxlen, "%s\n", name); \
1158 } \
1159 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1160 show_fc_vport_##title, NULL)
1161
1162
1163 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1164 i->private_vport_attrs[count] = device_attr_vport_##field; \
1165 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1166 i->private_vport_attrs[count].store = NULL; \
1167 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1168 if (i->f->get_##field) \
1169 count++
1170 /* NOTE: Above MACRO differs: checks function not show bit */
1171
1172 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1173 i->private_vport_attrs[count] = device_attr_vport_##field; \
1174 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1175 i->private_vport_attrs[count].store = NULL; \
1176 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1177 count++
1178
1179 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1180 i->private_vport_attrs[count] = device_attr_vport_##field; \
1181 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1182 if (i->f->field) \
1183 count++
1184 /* NOTE: Above MACRO differs: checks function */
1185
1186 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1187 i->private_vport_attrs[count] = device_attr_vport_##field; \
1188 if (!i->f->set_vport_##field) { \
1189 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1190 i->private_vport_attrs[count].store = NULL; \
1191 } \
1192 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1193 count++
1194 /* NOTE: Above MACRO differs: does not check show bit */
1195
1196 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1197 { \
1198 i->private_vport_attrs[count] = device_attr_vport_##field; \
1199 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1200 count++; \
1201 }
1202
1203
1204 /* The FC Transport Virtual Port Attributes: */
1205
1206 /* Fixed Virtual Port Attributes */
1207
1208 /* Dynamic Virtual Port Attributes */
1209
1210 /* Private Virtual Port Attributes */
1211
1212 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1213 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1214 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1215 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1216
1217 static ssize_t
1218 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1219 char *buf)
1220 {
1221 struct fc_vport *vport = transport_class_to_vport(dev);
1222
1223 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1224 return snprintf(buf, 20, "unknown\n");
1225 return get_fc_port_roles_names(vport->roles, buf);
1226 }
1227 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1228
1229 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1230
1231 fc_private_vport_show_function(symbolic_name, "%s\n",
1232 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1233 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1234 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1235 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1236
1237 static ssize_t
1238 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1239 const char *buf, size_t count)
1240 {
1241 struct fc_vport *vport = transport_class_to_vport(dev);
1242 struct Scsi_Host *shost = vport_to_shost(vport);
1243 unsigned long flags;
1244
1245 spin_lock_irqsave(shost->host_lock, flags);
1246 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
1247 spin_unlock_irqrestore(shost->host_lock, flags);
1248 return -EBUSY;
1249 }
1250 vport->flags |= FC_VPORT_DELETING;
1251 spin_unlock_irqrestore(shost->host_lock, flags);
1252
1253 fc_queue_work(shost, &vport->vport_delete_work);
1254 return count;
1255 }
1256 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1257 NULL, store_fc_vport_delete);
1258
1259
1260 /*
1261 * Enable/Disable vport
1262 * Write "1" to disable, write "0" to enable
1263 */
1264 static ssize_t
1265 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1266 const char *buf,
1267 size_t count)
1268 {
1269 struct fc_vport *vport = transport_class_to_vport(dev);
1270 struct Scsi_Host *shost = vport_to_shost(vport);
1271 struct fc_internal *i = to_fc_internal(shost->transportt);
1272 int stat;
1273
1274 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1275 return -EBUSY;
1276
1277 if (*buf == '0') {
1278 if (vport->vport_state != FC_VPORT_DISABLED)
1279 return -EALREADY;
1280 } else if (*buf == '1') {
1281 if (vport->vport_state == FC_VPORT_DISABLED)
1282 return -EALREADY;
1283 } else
1284 return -EINVAL;
1285
1286 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1287 return stat ? stat : count;
1288 }
1289 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1290 NULL, store_fc_vport_disable);
1291
1292
1293 /*
1294 * Host Attribute Management
1295 */
1296
1297 #define fc_host_show_function(field, format_string, sz, cast) \
1298 static ssize_t \
1299 show_fc_host_##field (struct device *dev, \
1300 struct device_attribute *attr, char *buf) \
1301 { \
1302 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1303 struct fc_internal *i = to_fc_internal(shost->transportt); \
1304 if (i->f->get_host_##field) \
1305 i->f->get_host_##field(shost); \
1306 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1307 }
1308
1309 #define fc_host_store_function(field) \
1310 static ssize_t \
1311 store_fc_host_##field(struct device *dev, \
1312 struct device_attribute *attr, \
1313 const char *buf, size_t count) \
1314 { \
1315 int val; \
1316 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1317 struct fc_internal *i = to_fc_internal(shost->transportt); \
1318 char *cp; \
1319 \
1320 val = simple_strtoul(buf, &cp, 0); \
1321 if (*cp && (*cp != '\n')) \
1322 return -EINVAL; \
1323 i->f->set_host_##field(shost, val); \
1324 return count; \
1325 }
1326
1327 #define fc_host_store_str_function(field, slen) \
1328 static ssize_t \
1329 store_fc_host_##field(struct device *dev, \
1330 struct device_attribute *attr, \
1331 const char *buf, size_t count) \
1332 { \
1333 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1334 struct fc_internal *i = to_fc_internal(shost->transportt); \
1335 unsigned int cnt=count; \
1336 \
1337 /* count may include a LF at end of string */ \
1338 if (buf[cnt-1] == '\n') \
1339 cnt--; \
1340 if (cnt > ((slen) - 1)) \
1341 return -EINVAL; \
1342 memcpy(fc_host_##field(shost), buf, cnt); \
1343 i->f->set_host_##field(shost); \
1344 return count; \
1345 }
1346
1347 #define fc_host_rd_attr(field, format_string, sz) \
1348 fc_host_show_function(field, format_string, sz, ) \
1349 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1350 show_fc_host_##field, NULL)
1351
1352 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1353 fc_host_show_function(field, format_string, sz, (cast)) \
1354 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1355 show_fc_host_##field, NULL)
1356
1357 #define fc_host_rw_attr(field, format_string, sz) \
1358 fc_host_show_function(field, format_string, sz, ) \
1359 fc_host_store_function(field) \
1360 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1361 show_fc_host_##field, \
1362 store_fc_host_##field)
1363
1364 #define fc_host_rd_enum_attr(title, maxlen) \
1365 static ssize_t \
1366 show_fc_host_##title (struct device *dev, \
1367 struct device_attribute *attr, char *buf) \
1368 { \
1369 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1370 struct fc_internal *i = to_fc_internal(shost->transportt); \
1371 const char *name; \
1372 if (i->f->get_host_##title) \
1373 i->f->get_host_##title(shost); \
1374 name = get_fc_##title##_name(fc_host_##title(shost)); \
1375 if (!name) \
1376 return -EINVAL; \
1377 return snprintf(buf, maxlen, "%s\n", name); \
1378 } \
1379 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1380
1381 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1382 i->private_host_attrs[count] = device_attr_host_##field; \
1383 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1384 i->private_host_attrs[count].store = NULL; \
1385 i->host_attrs[count] = &i->private_host_attrs[count]; \
1386 if (i->f->show_host_##field) \
1387 count++
1388
1389 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1390 i->private_host_attrs[count] = device_attr_host_##field; \
1391 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1392 i->private_host_attrs[count].store = NULL; \
1393 i->host_attrs[count] = &i->private_host_attrs[count]; \
1394 count++
1395
1396 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1397 i->private_host_attrs[count] = device_attr_host_##field; \
1398 if (!i->f->set_host_##field) { \
1399 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1400 i->private_host_attrs[count].store = NULL; \
1401 } \
1402 i->host_attrs[count] = &i->private_host_attrs[count]; \
1403 if (i->f->show_host_##field) \
1404 count++
1405
1406
1407 #define fc_private_host_show_function(field, format_string, sz, cast) \
1408 static ssize_t \
1409 show_fc_host_##field (struct device *dev, \
1410 struct device_attribute *attr, char *buf) \
1411 { \
1412 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1413 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1414 }
1415
1416 #define fc_private_host_rd_attr(field, format_string, sz) \
1417 fc_private_host_show_function(field, format_string, sz, ) \
1418 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1419 show_fc_host_##field, NULL)
1420
1421 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1422 fc_private_host_show_function(field, format_string, sz, (cast)) \
1423 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1424 show_fc_host_##field, NULL)
1425
1426 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1427 i->private_host_attrs[count] = device_attr_host_##field; \
1428 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1429 i->private_host_attrs[count].store = NULL; \
1430 i->host_attrs[count] = &i->private_host_attrs[count]; \
1431 count++
1432
1433 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1434 { \
1435 i->private_host_attrs[count] = device_attr_host_##field; \
1436 i->host_attrs[count] = &i->private_host_attrs[count]; \
1437 count++; \
1438 }
1439
1440
1441 /* Fixed Host Attributes */
1442
1443 static ssize_t
1444 show_fc_host_supported_classes (struct device *dev,
1445 struct device_attribute *attr, char *buf)
1446 {
1447 struct Scsi_Host *shost = transport_class_to_shost(dev);
1448
1449 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1450 return snprintf(buf, 20, "unspecified\n");
1451
1452 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1453 }
1454 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1455 show_fc_host_supported_classes, NULL);
1456
1457 static ssize_t
1458 show_fc_host_supported_fc4s (struct device *dev,
1459 struct device_attribute *attr, char *buf)
1460 {
1461 struct Scsi_Host *shost = transport_class_to_shost(dev);
1462 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1463 }
1464 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1465 show_fc_host_supported_fc4s, NULL);
1466
1467 static ssize_t
1468 show_fc_host_supported_speeds (struct device *dev,
1469 struct device_attribute *attr, char *buf)
1470 {
1471 struct Scsi_Host *shost = transport_class_to_shost(dev);
1472
1473 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1474 return snprintf(buf, 20, "unknown\n");
1475
1476 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1477 }
1478 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1479 show_fc_host_supported_speeds, NULL);
1480
1481
1482 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1483 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1484 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1485 unsigned long long);
1486 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1487 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1488 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1489
1490
1491 /* Dynamic Host Attributes */
1492
1493 static ssize_t
1494 show_fc_host_active_fc4s (struct device *dev,
1495 struct device_attribute *attr, char *buf)
1496 {
1497 struct Scsi_Host *shost = transport_class_to_shost(dev);
1498 struct fc_internal *i = to_fc_internal(shost->transportt);
1499
1500 if (i->f->get_host_active_fc4s)
1501 i->f->get_host_active_fc4s(shost);
1502
1503 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1504 }
1505 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1506 show_fc_host_active_fc4s, NULL);
1507
1508 static ssize_t
1509 show_fc_host_speed (struct device *dev,
1510 struct device_attribute *attr, char *buf)
1511 {
1512 struct Scsi_Host *shost = transport_class_to_shost(dev);
1513 struct fc_internal *i = to_fc_internal(shost->transportt);
1514
1515 if (i->f->get_host_speed)
1516 i->f->get_host_speed(shost);
1517
1518 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1519 return snprintf(buf, 20, "unknown\n");
1520
1521 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1522 }
1523 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1524 show_fc_host_speed, NULL);
1525
1526
1527 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1528 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1529 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1530 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1531 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1532
1533 fc_private_host_show_function(system_hostname, "%s\n",
1534 FC_SYMBOLIC_NAME_SIZE + 1, )
1535 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1536 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1537 show_fc_host_system_hostname, store_fc_host_system_hostname);
1538
1539
1540 /* Private Host Attributes */
1541
1542 static ssize_t
1543 show_fc_private_host_tgtid_bind_type(struct device *dev,
1544 struct device_attribute *attr, char *buf)
1545 {
1546 struct Scsi_Host *shost = transport_class_to_shost(dev);
1547 const char *name;
1548
1549 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1550 if (!name)
1551 return -EINVAL;
1552 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1553 }
1554
1555 #define get_list_head_entry(pos, head, member) \
1556 pos = list_entry((head)->next, typeof(*pos), member)
1557
1558 static ssize_t
1559 store_fc_private_host_tgtid_bind_type(struct device *dev,
1560 struct device_attribute *attr, const char *buf, size_t count)
1561 {
1562 struct Scsi_Host *shost = transport_class_to_shost(dev);
1563 struct fc_rport *rport;
1564 enum fc_tgtid_binding_type val;
1565 unsigned long flags;
1566
1567 if (get_fc_tgtid_bind_type_match(buf, &val))
1568 return -EINVAL;
1569
1570 /* if changing bind type, purge all unused consistent bindings */
1571 if (val != fc_host_tgtid_bind_type(shost)) {
1572 spin_lock_irqsave(shost->host_lock, flags);
1573 while (!list_empty(&fc_host_rport_bindings(shost))) {
1574 get_list_head_entry(rport,
1575 &fc_host_rport_bindings(shost), peers);
1576 list_del(&rport->peers);
1577 rport->port_state = FC_PORTSTATE_DELETED;
1578 fc_queue_work(shost, &rport->rport_delete_work);
1579 }
1580 spin_unlock_irqrestore(shost->host_lock, flags);
1581 }
1582
1583 fc_host_tgtid_bind_type(shost) = val;
1584 return count;
1585 }
1586
1587 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1588 show_fc_private_host_tgtid_bind_type,
1589 store_fc_private_host_tgtid_bind_type);
1590
1591 static ssize_t
1592 store_fc_private_host_issue_lip(struct device *dev,
1593 struct device_attribute *attr, const char *buf, size_t count)
1594 {
1595 struct Scsi_Host *shost = transport_class_to_shost(dev);
1596 struct fc_internal *i = to_fc_internal(shost->transportt);
1597 int ret;
1598
1599 /* ignore any data value written to the attribute */
1600 if (i->f->issue_fc_host_lip) {
1601 ret = i->f->issue_fc_host_lip(shost);
1602 return ret ? ret: count;
1603 }
1604
1605 return -ENOENT;
1606 }
1607
1608 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1609 store_fc_private_host_issue_lip);
1610
1611 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1612
1613
1614 /*
1615 * Host Statistics Management
1616 */
1617
1618 /* Show a given an attribute in the statistics group */
1619 static ssize_t
1620 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1621 {
1622 struct Scsi_Host *shost = transport_class_to_shost(dev);
1623 struct fc_internal *i = to_fc_internal(shost->transportt);
1624 struct fc_host_statistics *stats;
1625 ssize_t ret = -ENOENT;
1626
1627 if (offset > sizeof(struct fc_host_statistics) ||
1628 offset % sizeof(u64) != 0)
1629 WARN_ON(1);
1630
1631 if (i->f->get_fc_host_stats) {
1632 stats = (i->f->get_fc_host_stats)(shost);
1633 if (stats)
1634 ret = snprintf(buf, 20, "0x%llx\n",
1635 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1636 }
1637 return ret;
1638 }
1639
1640
1641 /* generate a read-only statistics attribute */
1642 #define fc_host_statistic(name) \
1643 static ssize_t show_fcstat_##name(struct device *cd, \
1644 struct device_attribute *attr, \
1645 char *buf) \
1646 { \
1647 return fc_stat_show(cd, buf, \
1648 offsetof(struct fc_host_statistics, name)); \
1649 } \
1650 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1651
1652 fc_host_statistic(seconds_since_last_reset);
1653 fc_host_statistic(tx_frames);
1654 fc_host_statistic(tx_words);
1655 fc_host_statistic(rx_frames);
1656 fc_host_statistic(rx_words);
1657 fc_host_statistic(lip_count);
1658 fc_host_statistic(nos_count);
1659 fc_host_statistic(error_frames);
1660 fc_host_statistic(dumped_frames);
1661 fc_host_statistic(link_failure_count);
1662 fc_host_statistic(loss_of_sync_count);
1663 fc_host_statistic(loss_of_signal_count);
1664 fc_host_statistic(prim_seq_protocol_err_count);
1665 fc_host_statistic(invalid_tx_word_count);
1666 fc_host_statistic(invalid_crc_count);
1667 fc_host_statistic(fcp_input_requests);
1668 fc_host_statistic(fcp_output_requests);
1669 fc_host_statistic(fcp_control_requests);
1670 fc_host_statistic(fcp_input_megabytes);
1671 fc_host_statistic(fcp_output_megabytes);
1672
1673 static ssize_t
1674 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1675 const char *buf, size_t count)
1676 {
1677 struct Scsi_Host *shost = transport_class_to_shost(dev);
1678 struct fc_internal *i = to_fc_internal(shost->transportt);
1679
1680 /* ignore any data value written to the attribute */
1681 if (i->f->reset_fc_host_stats) {
1682 i->f->reset_fc_host_stats(shost);
1683 return count;
1684 }
1685
1686 return -ENOENT;
1687 }
1688 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1689 fc_reset_statistics);
1690
1691 static struct attribute *fc_statistics_attrs[] = {
1692 &device_attr_host_seconds_since_last_reset.attr,
1693 &device_attr_host_tx_frames.attr,
1694 &device_attr_host_tx_words.attr,
1695 &device_attr_host_rx_frames.attr,
1696 &device_attr_host_rx_words.attr,
1697 &device_attr_host_lip_count.attr,
1698 &device_attr_host_nos_count.attr,
1699 &device_attr_host_error_frames.attr,
1700 &device_attr_host_dumped_frames.attr,
1701 &device_attr_host_link_failure_count.attr,
1702 &device_attr_host_loss_of_sync_count.attr,
1703 &device_attr_host_loss_of_signal_count.attr,
1704 &device_attr_host_prim_seq_protocol_err_count.attr,
1705 &device_attr_host_invalid_tx_word_count.attr,
1706 &device_attr_host_invalid_crc_count.attr,
1707 &device_attr_host_fcp_input_requests.attr,
1708 &device_attr_host_fcp_output_requests.attr,
1709 &device_attr_host_fcp_control_requests.attr,
1710 &device_attr_host_fcp_input_megabytes.attr,
1711 &device_attr_host_fcp_output_megabytes.attr,
1712 &device_attr_host_reset_statistics.attr,
1713 NULL
1714 };
1715
1716 static struct attribute_group fc_statistics_group = {
1717 .name = "statistics",
1718 .attrs = fc_statistics_attrs,
1719 };
1720
1721
1722 /* Host Vport Attributes */
1723
1724 static int
1725 fc_parse_wwn(const char *ns, u64 *nm)
1726 {
1727 unsigned int i, j;
1728 u8 wwn[8];
1729
1730 memset(wwn, 0, sizeof(wwn));
1731
1732 /* Validate and store the new name */
1733 for (i=0, j=0; i < 16; i++) {
1734 int value;
1735
1736 value = hex_to_bin(*ns++);
1737 if (value >= 0)
1738 j = (j << 4) | value;
1739 else
1740 return -EINVAL;
1741 if (i % 2) {
1742 wwn[i/2] = j & 0xff;
1743 j = 0;
1744 }
1745 }
1746
1747 *nm = wwn_to_u64(wwn);
1748
1749 return 0;
1750 }
1751
1752
1753 /*
1754 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1755 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1756 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1757 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1758 */
1759 static ssize_t
1760 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1761 const char *buf, size_t count)
1762 {
1763 struct Scsi_Host *shost = transport_class_to_shost(dev);
1764 struct fc_vport_identifiers vid;
1765 struct fc_vport *vport;
1766 unsigned int cnt=count;
1767 int stat;
1768
1769 memset(&vid, 0, sizeof(vid));
1770
1771 /* count may include a LF at end of string */
1772 if (buf[cnt-1] == '\n')
1773 cnt--;
1774
1775 /* validate we have enough characters for WWPN */
1776 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1777 return -EINVAL;
1778
1779 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1780 if (stat)
1781 return stat;
1782
1783 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1784 if (stat)
1785 return stat;
1786
1787 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1788 vid.vport_type = FC_PORTTYPE_NPIV;
1789 /* vid.symbolic_name is already zero/NULL's */
1790 vid.disable = false; /* always enabled */
1791
1792 /* we only allow support on Channel 0 !!! */
1793 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1794 return stat ? stat : count;
1795 }
1796 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1797 store_fc_host_vport_create);
1798
1799
1800 /*
1801 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1802 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1803 * The WWNs are specified as hex characters, and may *not* contain
1804 * any prefixes (e.g. 0x, x, etc)
1805 */
1806 static ssize_t
1807 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1808 const char *buf, size_t count)
1809 {
1810 struct Scsi_Host *shost = transport_class_to_shost(dev);
1811 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1812 struct fc_vport *vport;
1813 u64 wwpn, wwnn;
1814 unsigned long flags;
1815 unsigned int cnt=count;
1816 int stat, match;
1817
1818 /* count may include a LF at end of string */
1819 if (buf[cnt-1] == '\n')
1820 cnt--;
1821
1822 /* validate we have enough characters for WWPN */
1823 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1824 return -EINVAL;
1825
1826 stat = fc_parse_wwn(&buf[0], &wwpn);
1827 if (stat)
1828 return stat;
1829
1830 stat = fc_parse_wwn(&buf[17], &wwnn);
1831 if (stat)
1832 return stat;
1833
1834 spin_lock_irqsave(shost->host_lock, flags);
1835 match = 0;
1836 /* we only allow support on Channel 0 !!! */
1837 list_for_each_entry(vport, &fc_host->vports, peers) {
1838 if ((vport->channel == 0) &&
1839 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1840 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1841 break;
1842 vport->flags |= FC_VPORT_DELETING;
1843 match = 1;
1844 break;
1845 }
1846 }
1847 spin_unlock_irqrestore(shost->host_lock, flags);
1848
1849 if (!match)
1850 return -ENODEV;
1851
1852 stat = fc_vport_terminate(vport);
1853 return stat ? stat : count;
1854 }
1855 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1856 store_fc_host_vport_delete);
1857
1858
1859 static int fc_host_match(struct attribute_container *cont,
1860 struct device *dev)
1861 {
1862 struct Scsi_Host *shost;
1863 struct fc_internal *i;
1864
1865 if (!scsi_is_host_device(dev))
1866 return 0;
1867
1868 shost = dev_to_shost(dev);
1869 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1870 != &fc_host_class.class)
1871 return 0;
1872
1873 i = to_fc_internal(shost->transportt);
1874
1875 return &i->t.host_attrs.ac == cont;
1876 }
1877
1878 static int fc_target_match(struct attribute_container *cont,
1879 struct device *dev)
1880 {
1881 struct Scsi_Host *shost;
1882 struct fc_internal *i;
1883
1884 if (!scsi_is_target_device(dev))
1885 return 0;
1886
1887 shost = dev_to_shost(dev->parent);
1888 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1889 != &fc_host_class.class)
1890 return 0;
1891
1892 i = to_fc_internal(shost->transportt);
1893
1894 return &i->t.target_attrs.ac == cont;
1895 }
1896
1897 static void fc_rport_dev_release(struct device *dev)
1898 {
1899 struct fc_rport *rport = dev_to_rport(dev);
1900 put_device(dev->parent);
1901 kfree(rport);
1902 }
1903
1904 int scsi_is_fc_rport(const struct device *dev)
1905 {
1906 return dev->release == fc_rport_dev_release;
1907 }
1908 EXPORT_SYMBOL(scsi_is_fc_rport);
1909
1910 static int fc_rport_match(struct attribute_container *cont,
1911 struct device *dev)
1912 {
1913 struct Scsi_Host *shost;
1914 struct fc_internal *i;
1915
1916 if (!scsi_is_fc_rport(dev))
1917 return 0;
1918
1919 shost = dev_to_shost(dev->parent);
1920 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1921 != &fc_host_class.class)
1922 return 0;
1923
1924 i = to_fc_internal(shost->transportt);
1925
1926 return &i->rport_attr_cont.ac == cont;
1927 }
1928
1929
1930 static void fc_vport_dev_release(struct device *dev)
1931 {
1932 struct fc_vport *vport = dev_to_vport(dev);
1933 put_device(dev->parent); /* release kobj parent */
1934 kfree(vport);
1935 }
1936
1937 int scsi_is_fc_vport(const struct device *dev)
1938 {
1939 return dev->release == fc_vport_dev_release;
1940 }
1941 EXPORT_SYMBOL(scsi_is_fc_vport);
1942
1943 static int fc_vport_match(struct attribute_container *cont,
1944 struct device *dev)
1945 {
1946 struct fc_vport *vport;
1947 struct Scsi_Host *shost;
1948 struct fc_internal *i;
1949
1950 if (!scsi_is_fc_vport(dev))
1951 return 0;
1952 vport = dev_to_vport(dev);
1953
1954 shost = vport_to_shost(vport);
1955 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1956 != &fc_host_class.class)
1957 return 0;
1958
1959 i = to_fc_internal(shost->transportt);
1960 return &i->vport_attr_cont.ac == cont;
1961 }
1962
1963
1964 /**
1965 * fc_timed_out - FC Transport I/O timeout intercept handler
1966 * @scmd: The SCSI command which timed out
1967 *
1968 * This routine protects against error handlers getting invoked while a
1969 * rport is in a blocked state, typically due to a temporarily loss of
1970 * connectivity. If the error handlers are allowed to proceed, requests
1971 * to abort i/o, reset the target, etc will likely fail as there is no way
1972 * to communicate with the device to perform the requested function. These
1973 * failures may result in the midlayer taking the device offline, requiring
1974 * manual intervention to restore operation.
1975 *
1976 * This routine, called whenever an i/o times out, validates the state of
1977 * the underlying rport. If the rport is blocked, it returns
1978 * EH_RESET_TIMER, which will continue to reschedule the timeout.
1979 * Eventually, either the device will return, or devloss_tmo will fire,
1980 * and when the timeout then fires, it will be handled normally.
1981 * If the rport is not blocked, normal error handling continues.
1982 *
1983 * Notes:
1984 * This routine assumes no locks are held on entry.
1985 */
1986 static enum blk_eh_timer_return
1987 fc_timed_out(struct scsi_cmnd *scmd)
1988 {
1989 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
1990
1991 if (rport->port_state == FC_PORTSTATE_BLOCKED)
1992 return BLK_EH_RESET_TIMER;
1993
1994 return BLK_EH_NOT_HANDLED;
1995 }
1996
1997 /*
1998 * Called by fc_user_scan to locate an rport on the shost that
1999 * matches the channel and target id, and invoke scsi_scan_target()
2000 * on the rport.
2001 */
2002 static void
2003 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2004 {
2005 struct fc_rport *rport;
2006 unsigned long flags;
2007
2008 spin_lock_irqsave(shost->host_lock, flags);
2009
2010 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
2011 if (rport->scsi_target_id == -1)
2012 continue;
2013
2014 if (rport->port_state != FC_PORTSTATE_ONLINE)
2015 continue;
2016
2017 if ((channel == rport->channel) &&
2018 (id == rport->scsi_target_id)) {
2019 spin_unlock_irqrestore(shost->host_lock, flags);
2020 scsi_scan_target(&rport->dev, channel, id, lun, 1);
2021 return;
2022 }
2023 }
2024
2025 spin_unlock_irqrestore(shost->host_lock, flags);
2026 }
2027
2028 /*
2029 * Called via sysfs scan routines. Necessary, as the FC transport
2030 * wants to place all target objects below the rport object. So this
2031 * routine must invoke the scsi_scan_target() routine with the rport
2032 * object as the parent.
2033 */
2034 static int
2035 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
2036 {
2037 uint chlo, chhi;
2038 uint tgtlo, tgthi;
2039
2040 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
2041 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
2042 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
2043 return -EINVAL;
2044
2045 if (channel == SCAN_WILD_CARD) {
2046 chlo = 0;
2047 chhi = shost->max_channel + 1;
2048 } else {
2049 chlo = channel;
2050 chhi = channel + 1;
2051 }
2052
2053 if (id == SCAN_WILD_CARD) {
2054 tgtlo = 0;
2055 tgthi = shost->max_id;
2056 } else {
2057 tgtlo = id;
2058 tgthi = id + 1;
2059 }
2060
2061 for ( ; chlo < chhi; chlo++)
2062 for ( ; tgtlo < tgthi; tgtlo++)
2063 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2064
2065 return 0;
2066 }
2067
2068 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2069 int result)
2070 {
2071 struct fc_internal *i = to_fc_internal(shost->transportt);
2072 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2073 }
2074
2075 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2076 {
2077 struct fc_internal *i = to_fc_internal(shost->transportt);
2078 return i->f->it_nexus_response(shost, nexus, result);
2079 }
2080
2081 struct scsi_transport_template *
2082 fc_attach_transport(struct fc_function_template *ft)
2083 {
2084 int count;
2085 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2086 GFP_KERNEL);
2087
2088 if (unlikely(!i))
2089 return NULL;
2090
2091 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2092 i->t.target_attrs.ac.class = &fc_transport_class.class;
2093 i->t.target_attrs.ac.match = fc_target_match;
2094 i->t.target_size = sizeof(struct fc_starget_attrs);
2095 transport_container_register(&i->t.target_attrs);
2096
2097 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2098 i->t.host_attrs.ac.class = &fc_host_class.class;
2099 i->t.host_attrs.ac.match = fc_host_match;
2100 i->t.host_size = sizeof(struct fc_host_attrs);
2101 if (ft->get_fc_host_stats)
2102 i->t.host_attrs.statistics = &fc_statistics_group;
2103 transport_container_register(&i->t.host_attrs);
2104
2105 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2106 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2107 i->rport_attr_cont.ac.match = fc_rport_match;
2108 transport_container_register(&i->rport_attr_cont);
2109
2110 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2111 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2112 i->vport_attr_cont.ac.match = fc_vport_match;
2113 transport_container_register(&i->vport_attr_cont);
2114
2115 i->f = ft;
2116
2117 /* Transport uses the shost workq for scsi scanning */
2118 i->t.create_work_queue = 1;
2119
2120 i->t.eh_timed_out = fc_timed_out;
2121
2122 i->t.user_scan = fc_user_scan;
2123
2124 /* target-mode drivers' functions */
2125 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2126 i->t.it_nexus_response = fc_it_nexus_response;
2127
2128 /*
2129 * Setup SCSI Target Attributes.
2130 */
2131 count = 0;
2132 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2133 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2134 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2135
2136 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2137
2138 i->starget_attrs[count] = NULL;
2139
2140
2141 /*
2142 * Setup SCSI Host Attributes.
2143 */
2144 count=0;
2145 SETUP_HOST_ATTRIBUTE_RD(node_name);
2146 SETUP_HOST_ATTRIBUTE_RD(port_name);
2147 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2148 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2149 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2150 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2151 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2152 if (ft->vport_create) {
2153 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2154 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2155 }
2156 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2157
2158 SETUP_HOST_ATTRIBUTE_RD(port_id);
2159 SETUP_HOST_ATTRIBUTE_RD(port_type);
2160 SETUP_HOST_ATTRIBUTE_RD(port_state);
2161 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2162 SETUP_HOST_ATTRIBUTE_RD(speed);
2163 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2164 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2165 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2166
2167 /* Transport-managed attributes */
2168 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2169 if (ft->issue_fc_host_lip)
2170 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2171 if (ft->vport_create)
2172 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2173 if (ft->vport_delete)
2174 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2175
2176 BUG_ON(count > FC_HOST_NUM_ATTRS);
2177
2178 i->host_attrs[count] = NULL;
2179
2180 /*
2181 * Setup Remote Port Attributes.
2182 */
2183 count=0;
2184 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2185 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2186 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2187 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2188 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2189 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2190 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2191 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2192 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2193 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2194
2195 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2196
2197 i->rport_attrs[count] = NULL;
2198
2199 /*
2200 * Setup Virtual Port Attributes.
2201 */
2202 count=0;
2203 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2204 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2205 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2206 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2207 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2208 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2209 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2210 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2211 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2212
2213 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2214
2215 i->vport_attrs[count] = NULL;
2216
2217 return &i->t;
2218 }
2219 EXPORT_SYMBOL(fc_attach_transport);
2220
2221 void fc_release_transport(struct scsi_transport_template *t)
2222 {
2223 struct fc_internal *i = to_fc_internal(t);
2224
2225 transport_container_unregister(&i->t.target_attrs);
2226 transport_container_unregister(&i->t.host_attrs);
2227 transport_container_unregister(&i->rport_attr_cont);
2228 transport_container_unregister(&i->vport_attr_cont);
2229
2230 kfree(i);
2231 }
2232 EXPORT_SYMBOL(fc_release_transport);
2233
2234 /**
2235 * fc_queue_work - Queue work to the fc_host workqueue.
2236 * @shost: Pointer to Scsi_Host bound to fc_host.
2237 * @work: Work to queue for execution.
2238 *
2239 * Return value:
2240 * 1 - work queued for execution
2241 * 0 - work is already queued
2242 * -EINVAL - work queue doesn't exist
2243 */
2244 static int
2245 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2246 {
2247 if (unlikely(!fc_host_work_q(shost))) {
2248 printk(KERN_ERR
2249 "ERROR: FC host '%s' attempted to queue work, "
2250 "when no workqueue created.\n", shost->hostt->name);
2251 dump_stack();
2252
2253 return -EINVAL;
2254 }
2255
2256 return queue_work(fc_host_work_q(shost), work);
2257 }
2258
2259 /**
2260 * fc_flush_work - Flush a fc_host's workqueue.
2261 * @shost: Pointer to Scsi_Host bound to fc_host.
2262 */
2263 static void
2264 fc_flush_work(struct Scsi_Host *shost)
2265 {
2266 if (!fc_host_work_q(shost)) {
2267 printk(KERN_ERR
2268 "ERROR: FC host '%s' attempted to flush work, "
2269 "when no workqueue created.\n", shost->hostt->name);
2270 dump_stack();
2271 return;
2272 }
2273
2274 flush_workqueue(fc_host_work_q(shost));
2275 }
2276
2277 /**
2278 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2279 * @shost: Pointer to Scsi_Host bound to fc_host.
2280 * @work: Work to queue for execution.
2281 * @delay: jiffies to delay the work queuing
2282 *
2283 * Return value:
2284 * 1 on success / 0 already queued / < 0 for error
2285 */
2286 static int
2287 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2288 unsigned long delay)
2289 {
2290 if (unlikely(!fc_host_devloss_work_q(shost))) {
2291 printk(KERN_ERR
2292 "ERROR: FC host '%s' attempted to queue work, "
2293 "when no workqueue created.\n", shost->hostt->name);
2294 dump_stack();
2295
2296 return -EINVAL;
2297 }
2298
2299 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2300 }
2301
2302 /**
2303 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2304 * @shost: Pointer to Scsi_Host bound to fc_host.
2305 */
2306 static void
2307 fc_flush_devloss(struct Scsi_Host *shost)
2308 {
2309 if (!fc_host_devloss_work_q(shost)) {
2310 printk(KERN_ERR
2311 "ERROR: FC host '%s' attempted to flush work, "
2312 "when no workqueue created.\n", shost->hostt->name);
2313 dump_stack();
2314 return;
2315 }
2316
2317 flush_workqueue(fc_host_devloss_work_q(shost));
2318 }
2319
2320
2321 /**
2322 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2323 * @shost: Which &Scsi_Host
2324 *
2325 * This routine is expected to be called immediately preceeding the
2326 * a driver's call to scsi_remove_host().
2327 *
2328 * WARNING: A driver utilizing the fc_transport, which fails to call
2329 * this routine prior to scsi_remove_host(), will leave dangling
2330 * objects in /sys/class/fc_remote_ports. Access to any of these
2331 * objects can result in a system crash !!!
2332 *
2333 * Notes:
2334 * This routine assumes no locks are held on entry.
2335 */
2336 void
2337 fc_remove_host(struct Scsi_Host *shost)
2338 {
2339 struct fc_vport *vport = NULL, *next_vport = NULL;
2340 struct fc_rport *rport = NULL, *next_rport = NULL;
2341 struct workqueue_struct *work_q;
2342 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2343 unsigned long flags;
2344
2345 spin_lock_irqsave(shost->host_lock, flags);
2346
2347 /* Remove any vports */
2348 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2349 fc_queue_work(shost, &vport->vport_delete_work);
2350
2351 /* Remove any remote ports */
2352 list_for_each_entry_safe(rport, next_rport,
2353 &fc_host->rports, peers) {
2354 list_del(&rport->peers);
2355 rport->port_state = FC_PORTSTATE_DELETED;
2356 fc_queue_work(shost, &rport->rport_delete_work);
2357 }
2358
2359 list_for_each_entry_safe(rport, next_rport,
2360 &fc_host->rport_bindings, peers) {
2361 list_del(&rport->peers);
2362 rport->port_state = FC_PORTSTATE_DELETED;
2363 fc_queue_work(shost, &rport->rport_delete_work);
2364 }
2365
2366 spin_unlock_irqrestore(shost->host_lock, flags);
2367
2368 /* flush all scan work items */
2369 scsi_flush_work(shost);
2370
2371 /* flush all stgt delete, and rport delete work items, then kill it */
2372 if (fc_host->work_q) {
2373 work_q = fc_host->work_q;
2374 fc_host->work_q = NULL;
2375 destroy_workqueue(work_q);
2376 }
2377
2378 /* flush all devloss work items, then kill it */
2379 if (fc_host->devloss_work_q) {
2380 work_q = fc_host->devloss_work_q;
2381 fc_host->devloss_work_q = NULL;
2382 destroy_workqueue(work_q);
2383 }
2384 }
2385 EXPORT_SYMBOL(fc_remove_host);
2386
2387 static void fc_terminate_rport_io(struct fc_rport *rport)
2388 {
2389 struct Scsi_Host *shost = rport_to_shost(rport);
2390 struct fc_internal *i = to_fc_internal(shost->transportt);
2391
2392 /* Involve the LLDD if possible to terminate all io on the rport. */
2393 if (i->f->terminate_rport_io)
2394 i->f->terminate_rport_io(rport);
2395
2396 /*
2397 * must unblock to flush queued IO. The caller will have set
2398 * the port_state or flags, so that fc_remote_port_chkready will
2399 * fail IO.
2400 */
2401 scsi_target_unblock(&rport->dev);
2402 }
2403
2404 /**
2405 * fc_starget_delete - called to delete the scsi decendents of an rport
2406 * @work: remote port to be operated on.
2407 *
2408 * Deletes target and all sdevs.
2409 */
2410 static void
2411 fc_starget_delete(struct work_struct *work)
2412 {
2413 struct fc_rport *rport =
2414 container_of(work, struct fc_rport, stgt_delete_work);
2415
2416 fc_terminate_rport_io(rport);
2417 scsi_remove_target(&rport->dev);
2418 }
2419
2420
2421 /**
2422 * fc_rport_final_delete - finish rport termination and delete it.
2423 * @work: remote port to be deleted.
2424 */
2425 static void
2426 fc_rport_final_delete(struct work_struct *work)
2427 {
2428 struct fc_rport *rport =
2429 container_of(work, struct fc_rport, rport_delete_work);
2430 struct device *dev = &rport->dev;
2431 struct Scsi_Host *shost = rport_to_shost(rport);
2432 struct fc_internal *i = to_fc_internal(shost->transportt);
2433 unsigned long flags;
2434 int do_callback = 0;
2435
2436 /*
2437 * if a scan is pending, flush the SCSI Host work_q so that
2438 * that we can reclaim the rport scan work element.
2439 */
2440 if (rport->flags & FC_RPORT_SCAN_PENDING)
2441 scsi_flush_work(shost);
2442
2443 fc_terminate_rport_io(rport);
2444
2445 /*
2446 * Cancel any outstanding timers. These should really exist
2447 * only when rmmod'ing the LLDD and we're asking for
2448 * immediate termination of the rports
2449 */
2450 spin_lock_irqsave(shost->host_lock, flags);
2451 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2452 spin_unlock_irqrestore(shost->host_lock, flags);
2453 if (!cancel_delayed_work(&rport->fail_io_work))
2454 fc_flush_devloss(shost);
2455 if (!cancel_delayed_work(&rport->dev_loss_work))
2456 fc_flush_devloss(shost);
2457 spin_lock_irqsave(shost->host_lock, flags);
2458 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2459 }
2460 spin_unlock_irqrestore(shost->host_lock, flags);
2461
2462 /* Delete SCSI target and sdevs */
2463 if (rport->scsi_target_id != -1)
2464 fc_starget_delete(&rport->stgt_delete_work);
2465
2466 /*
2467 * Notify the driver that the rport is now dead. The LLDD will
2468 * also guarantee that any communication to the rport is terminated
2469 *
2470 * Avoid this call if we already called it when we preserved the
2471 * rport for the binding.
2472 */
2473 spin_lock_irqsave(shost->host_lock, flags);
2474 if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
2475 (i->f->dev_loss_tmo_callbk)) {
2476 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
2477 do_callback = 1;
2478 }
2479 spin_unlock_irqrestore(shost->host_lock, flags);
2480
2481 if (do_callback)
2482 i->f->dev_loss_tmo_callbk(rport);
2483
2484 fc_bsg_remove(rport->rqst_q);
2485
2486 transport_remove_device(dev);
2487 device_del(dev);
2488 transport_destroy_device(dev);
2489 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2490 put_device(dev); /* for self-reference */
2491 }
2492
2493
2494 /**
2495 * fc_rport_create - allocates and creates a remote FC port.
2496 * @shost: scsi host the remote port is connected to.
2497 * @channel: Channel on shost port connected to.
2498 * @ids: The world wide names, fc address, and FC4 port
2499 * roles for the remote port.
2500 *
2501 * Allocates and creates the remoter port structure, including the
2502 * class and sysfs creation.
2503 *
2504 * Notes:
2505 * This routine assumes no locks are held on entry.
2506 */
2507 static struct fc_rport *
2508 fc_rport_create(struct Scsi_Host *shost, int channel,
2509 struct fc_rport_identifiers *ids)
2510 {
2511 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2512 struct fc_internal *fci = to_fc_internal(shost->transportt);
2513 struct fc_rport *rport;
2514 struct device *dev;
2515 unsigned long flags;
2516 int error;
2517 size_t size;
2518
2519 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2520 rport = kzalloc(size, GFP_KERNEL);
2521 if (unlikely(!rport)) {
2522 printk(KERN_ERR "%s: allocation failure\n", __func__);
2523 return NULL;
2524 }
2525
2526 rport->maxframe_size = -1;
2527 rport->supported_classes = FC_COS_UNSPECIFIED;
2528 rport->dev_loss_tmo = fc_dev_loss_tmo;
2529 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2530 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2531 rport->port_id = ids->port_id;
2532 rport->roles = ids->roles;
2533 rport->port_state = FC_PORTSTATE_ONLINE;
2534 if (fci->f->dd_fcrport_size)
2535 rport->dd_data = &rport[1];
2536 rport->channel = channel;
2537 rport->fast_io_fail_tmo = -1;
2538
2539 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2540 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2541 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2542 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2543 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2544
2545 spin_lock_irqsave(shost->host_lock, flags);
2546
2547 rport->number = fc_host->next_rport_number++;
2548 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2549 rport->scsi_target_id = fc_host->next_target_id++;
2550 else
2551 rport->scsi_target_id = -1;
2552 list_add_tail(&rport->peers, &fc_host->rports);
2553 get_device(&shost->shost_gendev); /* for fc_host->rport list */
2554
2555 spin_unlock_irqrestore(shost->host_lock, flags);
2556
2557 dev = &rport->dev;
2558 device_initialize(dev); /* takes self reference */
2559 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2560 dev->release = fc_rport_dev_release;
2561 dev_set_name(dev, "rport-%d:%d-%d",
2562 shost->host_no, channel, rport->number);
2563 transport_setup_device(dev);
2564
2565 error = device_add(dev);
2566 if (error) {
2567 printk(KERN_ERR "FC Remote Port device_add failed\n");
2568 goto delete_rport;
2569 }
2570 transport_add_device(dev);
2571 transport_configure_device(dev);
2572
2573 fc_bsg_rportadd(shost, rport);
2574 /* ignore any bsg add error - we just can't do sgio */
2575
2576 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2577 /* initiate a scan of the target */
2578 rport->flags |= FC_RPORT_SCAN_PENDING;
2579 scsi_queue_work(shost, &rport->scan_work);
2580 }
2581
2582 return rport;
2583
2584 delete_rport:
2585 transport_destroy_device(dev);
2586 spin_lock_irqsave(shost->host_lock, flags);
2587 list_del(&rport->peers);
2588 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2589 spin_unlock_irqrestore(shost->host_lock, flags);
2590 put_device(dev->parent);
2591 kfree(rport);
2592 return NULL;
2593 }
2594
2595 /**
2596 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2597 * @shost: scsi host the remote port is connected to.
2598 * @channel: Channel on shost port connected to.
2599 * @ids: The world wide names, fc address, and FC4 port
2600 * roles for the remote port.
2601 *
2602 * The LLDD calls this routine to notify the transport of the existence
2603 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2604 * of the port, it's FC address (port_id), and the FC4 roles that are
2605 * active for the port.
2606 *
2607 * For ports that are FCP targets (aka scsi targets), the FC transport
2608 * maintains consistent target id bindings on behalf of the LLDD.
2609 * A consistent target id binding is an assignment of a target id to
2610 * a remote port identifier, which persists while the scsi host is
2611 * attached. The remote port can disappear, then later reappear, and
2612 * it's target id assignment remains the same. This allows for shifts
2613 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2614 * changes to the scsi subsystem which is based on scsi host number and
2615 * target id values. Bindings are only valid during the attachment of
2616 * the scsi host. If the host detaches, then later re-attaches, target
2617 * id bindings may change.
2618 *
2619 * This routine is responsible for returning a remote port structure.
2620 * The routine will search the list of remote ports it maintains
2621 * internally on behalf of consistent target id mappings. If found, the
2622 * remote port structure will be reused. Otherwise, a new remote port
2623 * structure will be allocated.
2624 *
2625 * Whenever a remote port is allocated, a new fc_remote_port class
2626 * device is created.
2627 *
2628 * Should not be called from interrupt context.
2629 *
2630 * Notes:
2631 * This routine assumes no locks are held on entry.
2632 */
2633 struct fc_rport *
2634 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2635 struct fc_rport_identifiers *ids)
2636 {
2637 struct fc_internal *fci = to_fc_internal(shost->transportt);
2638 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2639 struct fc_rport *rport;
2640 unsigned long flags;
2641 int match = 0;
2642
2643 /* ensure any stgt delete functions are done */
2644 fc_flush_work(shost);
2645
2646 /*
2647 * Search the list of "active" rports, for an rport that has been
2648 * deleted, but we've held off the real delete while the target
2649 * is in a "blocked" state.
2650 */
2651 spin_lock_irqsave(shost->host_lock, flags);
2652
2653 list_for_each_entry(rport, &fc_host->rports, peers) {
2654
2655 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2656 (rport->channel == channel)) {
2657
2658 switch (fc_host->tgtid_bind_type) {
2659 case FC_TGTID_BIND_BY_WWPN:
2660 case FC_TGTID_BIND_NONE:
2661 if (rport->port_name == ids->port_name)
2662 match = 1;
2663 break;
2664 case FC_TGTID_BIND_BY_WWNN:
2665 if (rport->node_name == ids->node_name)
2666 match = 1;
2667 break;
2668 case FC_TGTID_BIND_BY_ID:
2669 if (rport->port_id == ids->port_id)
2670 match = 1;
2671 break;
2672 }
2673
2674 if (match) {
2675
2676 memcpy(&rport->node_name, &ids->node_name,
2677 sizeof(rport->node_name));
2678 memcpy(&rport->port_name, &ids->port_name,
2679 sizeof(rport->port_name));
2680 rport->port_id = ids->port_id;
2681
2682 rport->port_state = FC_PORTSTATE_ONLINE;
2683 rport->roles = ids->roles;
2684
2685 spin_unlock_irqrestore(shost->host_lock, flags);
2686
2687 if (fci->f->dd_fcrport_size)
2688 memset(rport->dd_data, 0,
2689 fci->f->dd_fcrport_size);
2690
2691 /*
2692 * If we were not a target, cancel the
2693 * io terminate and rport timers, and
2694 * we're done.
2695 *
2696 * If we were a target, but our new role
2697 * doesn't indicate a target, leave the
2698 * timers running expecting the role to
2699 * change as the target fully logs in. If
2700 * it doesn't, the target will be torn down.
2701 *
2702 * If we were a target, and our role shows
2703 * we're still a target, cancel the timers
2704 * and kick off a scan.
2705 */
2706
2707 /* was a target, not in roles */
2708 if ((rport->scsi_target_id != -1) &&
2709 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2710 return rport;
2711
2712 /*
2713 * Stop the fail io and dev_loss timers.
2714 * If they flush, the port_state will
2715 * be checked and will NOOP the function.
2716 */
2717 if (!cancel_delayed_work(&rport->fail_io_work))
2718 fc_flush_devloss(shost);
2719 if (!cancel_delayed_work(&rport->dev_loss_work))
2720 fc_flush_devloss(shost);
2721
2722 spin_lock_irqsave(shost->host_lock, flags);
2723
2724 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2725 FC_RPORT_DEVLOSS_PENDING |
2726 FC_RPORT_DEVLOSS_CALLBK_DONE);
2727
2728 /* if target, initiate a scan */
2729 if (rport->scsi_target_id != -1) {
2730 rport->flags |= FC_RPORT_SCAN_PENDING;
2731 scsi_queue_work(shost,
2732 &rport->scan_work);
2733 spin_unlock_irqrestore(shost->host_lock,
2734 flags);
2735 scsi_target_unblock(&rport->dev);
2736 } else
2737 spin_unlock_irqrestore(shost->host_lock,
2738 flags);
2739
2740 fc_bsg_goose_queue(rport);
2741
2742 return rport;
2743 }
2744 }
2745 }
2746
2747 /*
2748 * Search the bindings array
2749 * Note: if never a FCP target, you won't be on this list
2750 */
2751 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2752
2753 /* search for a matching consistent binding */
2754
2755 list_for_each_entry(rport, &fc_host->rport_bindings,
2756 peers) {
2757 if (rport->channel != channel)
2758 continue;
2759
2760 switch (fc_host->tgtid_bind_type) {
2761 case FC_TGTID_BIND_BY_WWPN:
2762 if (rport->port_name == ids->port_name)
2763 match = 1;
2764 break;
2765 case FC_TGTID_BIND_BY_WWNN:
2766 if (rport->node_name == ids->node_name)
2767 match = 1;
2768 break;
2769 case FC_TGTID_BIND_BY_ID:
2770 if (rport->port_id == ids->port_id)
2771 match = 1;
2772 break;
2773 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2774 break;
2775 }
2776
2777 if (match) {
2778 list_move_tail(&rport->peers, &fc_host->rports);
2779 break;
2780 }
2781 }
2782
2783 if (match) {
2784 memcpy(&rport->node_name, &ids->node_name,
2785 sizeof(rport->node_name));
2786 memcpy(&rport->port_name, &ids->port_name,
2787 sizeof(rport->port_name));
2788 rport->port_id = ids->port_id;
2789 rport->roles = ids->roles;
2790 rport->port_state = FC_PORTSTATE_ONLINE;
2791 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2792
2793 if (fci->f->dd_fcrport_size)
2794 memset(rport->dd_data, 0,
2795 fci->f->dd_fcrport_size);
2796
2797 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2798 /* initiate a scan of the target */
2799 rport->flags |= FC_RPORT_SCAN_PENDING;
2800 scsi_queue_work(shost, &rport->scan_work);
2801 spin_unlock_irqrestore(shost->host_lock, flags);
2802 scsi_target_unblock(&rport->dev);
2803 } else
2804 spin_unlock_irqrestore(shost->host_lock, flags);
2805
2806 return rport;
2807 }
2808 }
2809
2810 spin_unlock_irqrestore(shost->host_lock, flags);
2811
2812 /* No consistent binding found - create new remote port entry */
2813 rport = fc_rport_create(shost, channel, ids);
2814
2815 return rport;
2816 }
2817 EXPORT_SYMBOL(fc_remote_port_add);
2818
2819
2820 /**
2821 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2822 * @rport: The remote port that no longer exists
2823 *
2824 * The LLDD calls this routine to notify the transport that a remote
2825 * port is no longer part of the topology. Note: Although a port
2826 * may no longer be part of the topology, it may persist in the remote
2827 * ports displayed by the fc_host. We do this under 2 conditions:
2828 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2829 * This allows the port to temporarily disappear, then reappear without
2830 * disrupting the SCSI device tree attached to it. During the "blocked"
2831 * period the port will still exist.
2832 * 2) If the port was a scsi target and disappears for longer than we
2833 * expect, we'll delete the port and the tear down the SCSI device tree
2834 * attached to it. However, we want to semi-persist the target id assigned
2835 * to that port if it eventually does exist. The port structure will
2836 * remain (although with minimal information) so that the target id
2837 * bindings remails.
2838 *
2839 * If the remote port is not an FCP Target, it will be fully torn down
2840 * and deallocated, including the fc_remote_port class device.
2841 *
2842 * If the remote port is an FCP Target, the port will be placed in a
2843 * temporary blocked state. From the LLDD's perspective, the rport no
2844 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2845 * exists, but all sdevs on it are blocked from further I/O. The following
2846 * is then expected.
2847 *
2848 * If the remote port does not return (signaled by a LLDD call to
2849 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2850 * scsi target is removed - killing all outstanding i/o and removing the
2851 * scsi devices attached ot it. The port structure will be marked Not
2852 * Present and be partially cleared, leaving only enough information to
2853 * recognize the remote port relative to the scsi target id binding if
2854 * it later appears. The port will remain as long as there is a valid
2855 * binding (e.g. until the user changes the binding type or unloads the
2856 * scsi host with the binding).
2857 *
2858 * If the remote port returns within the dev_loss_tmo value (and matches
2859 * according to the target id binding type), the port structure will be
2860 * reused. If it is no longer a SCSI target, the target will be torn
2861 * down. If it continues to be a SCSI target, then the target will be
2862 * unblocked (allowing i/o to be resumed), and a scan will be activated
2863 * to ensure that all luns are detected.
2864 *
2865 * Called from normal process context only - cannot be called from interrupt.
2866 *
2867 * Notes:
2868 * This routine assumes no locks are held on entry.
2869 */
2870 void
2871 fc_remote_port_delete(struct fc_rport *rport)
2872 {
2873 struct Scsi_Host *shost = rport_to_shost(rport);
2874 unsigned long timeout = rport->dev_loss_tmo;
2875 unsigned long flags;
2876
2877 /*
2878 * No need to flush the fc_host work_q's, as all adds are synchronous.
2879 *
2880 * We do need to reclaim the rport scan work element, so eventually
2881 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2882 * there's still a scan pending.
2883 */
2884
2885 spin_lock_irqsave(shost->host_lock, flags);
2886
2887 if (rport->port_state != FC_PORTSTATE_ONLINE) {
2888 spin_unlock_irqrestore(shost->host_lock, flags);
2889 return;
2890 }
2891
2892 /*
2893 * In the past, we if this was not an FCP-Target, we would
2894 * unconditionally just jump to deleting the rport.
2895 * However, rports can be used as node containers by the LLDD,
2896 * and its not appropriate to just terminate the rport at the
2897 * first sign of a loss in connectivity. The LLDD may want to
2898 * send ELS traffic to re-validate the login. If the rport is
2899 * immediately deleted, it makes it inappropriate for a node
2900 * container.
2901 * So... we now unconditionally wait dev_loss_tmo before
2902 * destroying an rport.
2903 */
2904
2905 rport->port_state = FC_PORTSTATE_BLOCKED;
2906
2907 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2908
2909 spin_unlock_irqrestore(shost->host_lock, flags);
2910
2911 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
2912 shost->active_mode & MODE_TARGET)
2913 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
2914
2915 scsi_target_block(&rport->dev);
2916
2917 /* see if we need to kill io faster than waiting for device loss */
2918 if ((rport->fast_io_fail_tmo != -1) &&
2919 (rport->fast_io_fail_tmo < timeout))
2920 fc_queue_devloss_work(shost, &rport->fail_io_work,
2921 rport->fast_io_fail_tmo * HZ);
2922
2923 /* cap the length the devices can be blocked until they are deleted */
2924 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
2925 }
2926 EXPORT_SYMBOL(fc_remote_port_delete);
2927
2928 /**
2929 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
2930 * @rport: The remote port that changed.
2931 * @roles: New roles for this port.
2932 *
2933 * Description: The LLDD calls this routine to notify the transport that the
2934 * roles on a remote port may have changed. The largest effect of this is
2935 * if a port now becomes a FCP Target, it must be allocated a
2936 * scsi target id. If the port is no longer a FCP target, any
2937 * scsi target id value assigned to it will persist in case the
2938 * role changes back to include FCP Target. No changes in the scsi
2939 * midlayer will be invoked if the role changes (in the expectation
2940 * that the role will be resumed. If it doesn't normal error processing
2941 * will take place).
2942 *
2943 * Should not be called from interrupt context.
2944 *
2945 * Notes:
2946 * This routine assumes no locks are held on entry.
2947 */
2948 void
2949 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
2950 {
2951 struct Scsi_Host *shost = rport_to_shost(rport);
2952 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2953 unsigned long flags;
2954 int create = 0;
2955 int ret;
2956
2957 spin_lock_irqsave(shost->host_lock, flags);
2958 if (roles & FC_PORT_ROLE_FCP_TARGET) {
2959 if (rport->scsi_target_id == -1) {
2960 rport->scsi_target_id = fc_host->next_target_id++;
2961 create = 1;
2962 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
2963 create = 1;
2964 } else if (shost->active_mode & MODE_TARGET) {
2965 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
2966 (char *)&rport->node_name);
2967 if (ret)
2968 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
2969 ret);
2970 }
2971
2972 rport->roles = roles;
2973
2974 spin_unlock_irqrestore(shost->host_lock, flags);
2975
2976 if (create) {
2977 /*
2978 * There may have been a delete timer running on the
2979 * port. Ensure that it is cancelled as we now know
2980 * the port is an FCP Target.
2981 * Note: we know the rport is exists and in an online
2982 * state as the LLDD would not have had an rport
2983 * reference to pass us.
2984 *
2985 * Take no action on the del_timer failure as the state
2986 * machine state change will validate the
2987 * transaction.
2988 */
2989 if (!cancel_delayed_work(&rport->fail_io_work))
2990 fc_flush_devloss(shost);
2991 if (!cancel_delayed_work(&rport->dev_loss_work))
2992 fc_flush_devloss(shost);
2993
2994 spin_lock_irqsave(shost->host_lock, flags);
2995 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2996 FC_RPORT_DEVLOSS_PENDING);
2997 spin_unlock_irqrestore(shost->host_lock, flags);
2998
2999 /* ensure any stgt delete functions are done */
3000 fc_flush_work(shost);
3001
3002 /* initiate a scan of the target */
3003 spin_lock_irqsave(shost->host_lock, flags);
3004 rport->flags |= FC_RPORT_SCAN_PENDING;
3005 scsi_queue_work(shost, &rport->scan_work);
3006 spin_unlock_irqrestore(shost->host_lock, flags);
3007 scsi_target_unblock(&rport->dev);
3008 }
3009 }
3010 EXPORT_SYMBOL(fc_remote_port_rolechg);
3011
3012 /**
3013 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
3014 * @work: rport target that failed to reappear in the allotted time.
3015 *
3016 * Description: An attempt to delete a remote port blocks, and if it fails
3017 * to return in the allotted time this gets called.
3018 */
3019 static void
3020 fc_timeout_deleted_rport(struct work_struct *work)
3021 {
3022 struct fc_rport *rport =
3023 container_of(work, struct fc_rport, dev_loss_work.work);
3024 struct Scsi_Host *shost = rport_to_shost(rport);
3025 struct fc_internal *i = to_fc_internal(shost->transportt);
3026 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3027 unsigned long flags;
3028 int do_callback = 0;
3029
3030 spin_lock_irqsave(shost->host_lock, flags);
3031
3032 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
3033
3034 /*
3035 * If the port is ONLINE, then it came back. If it was a SCSI
3036 * target, validate it still is. If not, tear down the
3037 * scsi_target on it.
3038 */
3039 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3040 (rport->scsi_target_id != -1) &&
3041 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
3042 dev_printk(KERN_ERR, &rport->dev,
3043 "blocked FC remote port time out: no longer"
3044 " a FCP target, removing starget\n");
3045 spin_unlock_irqrestore(shost->host_lock, flags);
3046 scsi_target_unblock(&rport->dev);
3047 fc_queue_work(shost, &rport->stgt_delete_work);
3048 return;
3049 }
3050
3051 /* NOOP state - we're flushing workq's */
3052 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
3053 spin_unlock_irqrestore(shost->host_lock, flags);
3054 dev_printk(KERN_ERR, &rport->dev,
3055 "blocked FC remote port time out: leaving"
3056 " rport%s alone\n",
3057 (rport->scsi_target_id != -1) ? " and starget" : "");
3058 return;
3059 }
3060
3061 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
3062 (rport->scsi_target_id == -1)) {
3063 list_del(&rport->peers);
3064 rport->port_state = FC_PORTSTATE_DELETED;
3065 dev_printk(KERN_ERR, &rport->dev,
3066 "blocked FC remote port time out: removing"
3067 " rport%s\n",
3068 (rport->scsi_target_id != -1) ? " and starget" : "");
3069 fc_queue_work(shost, &rport->rport_delete_work);
3070 spin_unlock_irqrestore(shost->host_lock, flags);
3071 return;
3072 }
3073
3074 dev_printk(KERN_ERR, &rport->dev,
3075 "blocked FC remote port time out: removing target and "
3076 "saving binding\n");
3077
3078 list_move_tail(&rport->peers, &fc_host->rport_bindings);
3079
3080 /*
3081 * Note: We do not remove or clear the hostdata area. This allows
3082 * host-specific target data to persist along with the
3083 * scsi_target_id. It's up to the host to manage it's hostdata area.
3084 */
3085
3086 /*
3087 * Reinitialize port attributes that may change if the port comes back.
3088 */
3089 rport->maxframe_size = -1;
3090 rport->supported_classes = FC_COS_UNSPECIFIED;
3091 rport->roles = FC_PORT_ROLE_UNKNOWN;
3092 rport->port_state = FC_PORTSTATE_NOTPRESENT;
3093 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3094
3095 /*
3096 * Pre-emptively kill I/O rather than waiting for the work queue
3097 * item to teardown the starget. (FCOE libFC folks prefer this
3098 * and to have the rport_port_id still set when it's done).
3099 */
3100 spin_unlock_irqrestore(shost->host_lock, flags);
3101 fc_terminate_rport_io(rport);
3102
3103 spin_lock_irqsave(shost->host_lock, flags);
3104
3105 if (rport->port_state == FC_PORTSTATE_NOTPRESENT) { /* still missing */
3106
3107 /* remove the identifiers that aren't used in the consisting binding */
3108 switch (fc_host->tgtid_bind_type) {
3109 case FC_TGTID_BIND_BY_WWPN:
3110 rport->node_name = -1;
3111 rport->port_id = -1;
3112 break;
3113 case FC_TGTID_BIND_BY_WWNN:
3114 rport->port_name = -1;
3115 rport->port_id = -1;
3116 break;
3117 case FC_TGTID_BIND_BY_ID:
3118 rport->node_name = -1;
3119 rport->port_name = -1;
3120 break;
3121 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3122 break;
3123 }
3124
3125 /*
3126 * As this only occurs if the remote port (scsi target)
3127 * went away and didn't come back - we'll remove
3128 * all attached scsi devices.
3129 */
3130 rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
3131 fc_queue_work(shost, &rport->stgt_delete_work);
3132
3133 do_callback = 1;
3134 }
3135
3136 spin_unlock_irqrestore(shost->host_lock, flags);
3137
3138 /*
3139 * Notify the driver that the rport is now dead. The LLDD will
3140 * also guarantee that any communication to the rport is terminated
3141 *
3142 * Note: we set the CALLBK_DONE flag above to correspond
3143 */
3144 if (do_callback && i->f->dev_loss_tmo_callbk)
3145 i->f->dev_loss_tmo_callbk(rport);
3146 }
3147
3148
3149 /**
3150 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3151 * @work: rport to terminate io on.
3152 *
3153 * Notes: Only requests the failure of the io, not that all are flushed
3154 * prior to returning.
3155 */
3156 static void
3157 fc_timeout_fail_rport_io(struct work_struct *work)
3158 {
3159 struct fc_rport *rport =
3160 container_of(work, struct fc_rport, fail_io_work.work);
3161
3162 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3163 return;
3164
3165 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3166 fc_terminate_rport_io(rport);
3167 }
3168
3169 /**
3170 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3171 * @work: remote port to be scanned.
3172 */
3173 static void
3174 fc_scsi_scan_rport(struct work_struct *work)
3175 {
3176 struct fc_rport *rport =
3177 container_of(work, struct fc_rport, scan_work);
3178 struct Scsi_Host *shost = rport_to_shost(rport);
3179 struct fc_internal *i = to_fc_internal(shost->transportt);
3180 unsigned long flags;
3181
3182 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3183 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3184 !(i->f->disable_target_scan)) {
3185 scsi_scan_target(&rport->dev, rport->channel,
3186 rport->scsi_target_id, SCAN_WILD_CARD, 1);
3187 }
3188
3189 spin_lock_irqsave(shost->host_lock, flags);
3190 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3191 spin_unlock_irqrestore(shost->host_lock, flags);
3192 }
3193
3194 /**
3195 * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
3196 * @cmnd: SCSI command that scsi_eh is trying to recover
3197 *
3198 * This routine can be called from a FC LLD scsi_eh callback. It
3199 * blocks the scsi_eh thread until the fc_rport leaves the
3200 * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
3201 * necessary to avoid the scsi_eh failing recovery actions for blocked
3202 * rports which would lead to offlined SCSI devices.
3203 *
3204 * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
3205 * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
3206 * passed back to scsi_eh.
3207 */
3208 int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
3209 {
3210 struct Scsi_Host *shost = cmnd->device->host;
3211 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
3212 unsigned long flags;
3213
3214 spin_lock_irqsave(shost->host_lock, flags);
3215 while (rport->port_state == FC_PORTSTATE_BLOCKED &&
3216 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
3217 spin_unlock_irqrestore(shost->host_lock, flags);
3218 msleep(1000);
3219 spin_lock_irqsave(shost->host_lock, flags);
3220 }
3221 spin_unlock_irqrestore(shost->host_lock, flags);
3222
3223 if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
3224 return FAST_IO_FAIL;
3225
3226 return 0;
3227 }
3228 EXPORT_SYMBOL(fc_block_scsi_eh);
3229
3230 /**
3231 * fc_vport_setup - allocates and creates a FC virtual port.
3232 * @shost: scsi host the virtual port is connected to.
3233 * @channel: Channel on shost port connected to.
3234 * @pdev: parent device for vport
3235 * @ids: The world wide names, FC4 port roles, etc for
3236 * the virtual port.
3237 * @ret_vport: The pointer to the created vport.
3238 *
3239 * Allocates and creates the vport structure, calls the parent host
3240 * to instantiate the vport, the completes w/ class and sysfs creation.
3241 *
3242 * Notes:
3243 * This routine assumes no locks are held on entry.
3244 */
3245 static int
3246 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3247 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3248 {
3249 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3250 struct fc_internal *fci = to_fc_internal(shost->transportt);
3251 struct fc_vport *vport;
3252 struct device *dev;
3253 unsigned long flags;
3254 size_t size;
3255 int error;
3256
3257 *ret_vport = NULL;
3258
3259 if ( ! fci->f->vport_create)
3260 return -ENOENT;
3261
3262 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3263 vport = kzalloc(size, GFP_KERNEL);
3264 if (unlikely(!vport)) {
3265 printk(KERN_ERR "%s: allocation failure\n", __func__);
3266 return -ENOMEM;
3267 }
3268
3269 vport->vport_state = FC_VPORT_UNKNOWN;
3270 vport->vport_last_state = FC_VPORT_UNKNOWN;
3271 vport->node_name = ids->node_name;
3272 vport->port_name = ids->port_name;
3273 vport->roles = ids->roles;
3274 vport->vport_type = ids->vport_type;
3275 if (fci->f->dd_fcvport_size)
3276 vport->dd_data = &vport[1];
3277 vport->shost = shost;
3278 vport->channel = channel;
3279 vport->flags = FC_VPORT_CREATING;
3280 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3281
3282 spin_lock_irqsave(shost->host_lock, flags);
3283
3284 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3285 spin_unlock_irqrestore(shost->host_lock, flags);
3286 kfree(vport);
3287 return -ENOSPC;
3288 }
3289 fc_host->npiv_vports_inuse++;
3290 vport->number = fc_host->next_vport_number++;
3291 list_add_tail(&vport->peers, &fc_host->vports);
3292 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3293
3294 spin_unlock_irqrestore(shost->host_lock, flags);
3295
3296 dev = &vport->dev;
3297 device_initialize(dev); /* takes self reference */
3298 dev->parent = get_device(pdev); /* takes parent reference */
3299 dev->release = fc_vport_dev_release;
3300 dev_set_name(dev, "vport-%d:%d-%d",
3301 shost->host_no, channel, vport->number);
3302 transport_setup_device(dev);
3303
3304 error = device_add(dev);
3305 if (error) {
3306 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3307 goto delete_vport;
3308 }
3309 transport_add_device(dev);
3310 transport_configure_device(dev);
3311
3312 error = fci->f->vport_create(vport, ids->disable);
3313 if (error) {
3314 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3315 goto delete_vport_all;
3316 }
3317
3318 /*
3319 * if the parent isn't the physical adapter's Scsi_Host, ensure
3320 * the Scsi_Host at least contains ia symlink to the vport.
3321 */
3322 if (pdev != &shost->shost_gendev) {
3323 error = sysfs_create_link(&shost->shost_gendev.kobj,
3324 &dev->kobj, dev_name(dev));
3325 if (error)
3326 printk(KERN_ERR
3327 "%s: Cannot create vport symlinks for "
3328 "%s, err=%d\n",
3329 __func__, dev_name(dev), error);
3330 }
3331 spin_lock_irqsave(shost->host_lock, flags);
3332 vport->flags &= ~FC_VPORT_CREATING;
3333 spin_unlock_irqrestore(shost->host_lock, flags);
3334
3335 dev_printk(KERN_NOTICE, pdev,
3336 "%s created via shost%d channel %d\n", dev_name(dev),
3337 shost->host_no, channel);
3338
3339 *ret_vport = vport;
3340
3341 return 0;
3342
3343 delete_vport_all:
3344 transport_remove_device(dev);
3345 device_del(dev);
3346 delete_vport:
3347 transport_destroy_device(dev);
3348 spin_lock_irqsave(shost->host_lock, flags);
3349 list_del(&vport->peers);
3350 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3351 fc_host->npiv_vports_inuse--;
3352 spin_unlock_irqrestore(shost->host_lock, flags);
3353 put_device(dev->parent);
3354 kfree(vport);
3355
3356 return error;
3357 }
3358
3359 /**
3360 * fc_vport_create - Admin App or LLDD requests creation of a vport
3361 * @shost: scsi host the virtual port is connected to.
3362 * @channel: channel on shost port connected to.
3363 * @ids: The world wide names, FC4 port roles, etc for
3364 * the virtual port.
3365 *
3366 * Notes:
3367 * This routine assumes no locks are held on entry.
3368 */
3369 struct fc_vport *
3370 fc_vport_create(struct Scsi_Host *shost, int channel,
3371 struct fc_vport_identifiers *ids)
3372 {
3373 int stat;
3374 struct fc_vport *vport;
3375
3376 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3377 ids, &vport);
3378 return stat ? NULL : vport;
3379 }
3380 EXPORT_SYMBOL(fc_vport_create);
3381
3382 /**
3383 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3384 * @vport: fc_vport to be terminated
3385 *
3386 * Calls the LLDD vport_delete() function, then deallocates and removes
3387 * the vport from the shost and object tree.
3388 *
3389 * Notes:
3390 * This routine assumes no locks are held on entry.
3391 */
3392 int
3393 fc_vport_terminate(struct fc_vport *vport)
3394 {
3395 struct Scsi_Host *shost = vport_to_shost(vport);
3396 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3397 struct fc_internal *i = to_fc_internal(shost->transportt);
3398 struct device *dev = &vport->dev;
3399 unsigned long flags;
3400 int stat;
3401
3402 if (i->f->vport_delete)
3403 stat = i->f->vport_delete(vport);
3404 else
3405 stat = -ENOENT;
3406
3407 spin_lock_irqsave(shost->host_lock, flags);
3408 vport->flags &= ~FC_VPORT_DELETING;
3409 if (!stat) {
3410 vport->flags |= FC_VPORT_DELETED;
3411 list_del(&vport->peers);
3412 fc_host->npiv_vports_inuse--;
3413 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3414 }
3415 spin_unlock_irqrestore(shost->host_lock, flags);
3416
3417 if (stat)
3418 return stat;
3419
3420 if (dev->parent != &shost->shost_gendev)
3421 sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
3422 transport_remove_device(dev);
3423 device_del(dev);
3424 transport_destroy_device(dev);
3425
3426 /*
3427 * Removing our self-reference should mean our
3428 * release function gets called, which will drop the remaining
3429 * parent reference and free the data structure.
3430 */
3431 put_device(dev); /* for self-reference */
3432
3433 return 0; /* SUCCESS */
3434 }
3435 EXPORT_SYMBOL(fc_vport_terminate);
3436
3437 /**
3438 * fc_vport_sched_delete - workq-based delete request for a vport
3439 * @work: vport to be deleted.
3440 */
3441 static void
3442 fc_vport_sched_delete(struct work_struct *work)
3443 {
3444 struct fc_vport *vport =
3445 container_of(work, struct fc_vport, vport_delete_work);
3446 int stat;
3447
3448 stat = fc_vport_terminate(vport);
3449 if (stat)
3450 dev_printk(KERN_ERR, vport->dev.parent,
3451 "%s: %s could not be deleted created via "
3452 "shost%d channel %d - error %d\n", __func__,
3453 dev_name(&vport->dev), vport->shost->host_no,
3454 vport->channel, stat);
3455 }
3456
3457
3458 /*
3459 * BSG support
3460 */
3461
3462
3463 /**
3464 * fc_destroy_bsgjob - routine to teardown/delete a fc bsg job
3465 * @job: fc_bsg_job that is to be torn down
3466 */
3467 static void
3468 fc_destroy_bsgjob(struct fc_bsg_job *job)
3469 {
3470 unsigned long flags;
3471
3472 spin_lock_irqsave(&job->job_lock, flags);
3473 if (job->ref_cnt) {
3474 spin_unlock_irqrestore(&job->job_lock, flags);
3475 return;
3476 }
3477 spin_unlock_irqrestore(&job->job_lock, flags);
3478
3479 put_device(job->dev); /* release reference for the request */
3480
3481 kfree(job->request_payload.sg_list);
3482 kfree(job->reply_payload.sg_list);
3483 kfree(job);
3484 }
3485
3486 /**
3487 * fc_bsg_jobdone - completion routine for bsg requests that the LLD has
3488 * completed
3489 * @job: fc_bsg_job that is complete
3490 */
3491 static void
3492 fc_bsg_jobdone(struct fc_bsg_job *job)
3493 {
3494 struct request *req = job->req;
3495 struct request *rsp = req->next_rq;
3496 int err;
3497
3498 err = job->req->errors = job->reply->result;
3499
3500 if (err < 0)
3501 /* we're only returning the result field in the reply */
3502 job->req->sense_len = sizeof(uint32_t);
3503 else
3504 job->req->sense_len = job->reply_len;
3505
3506 /* we assume all request payload was transferred, residual == 0 */
3507 req->resid_len = 0;
3508
3509 if (rsp) {
3510 WARN_ON(job->reply->reply_payload_rcv_len > rsp->resid_len);
3511
3512 /* set reply (bidi) residual */
3513 rsp->resid_len -= min(job->reply->reply_payload_rcv_len,
3514 rsp->resid_len);
3515 }
3516 blk_complete_request(req);
3517 }
3518
3519 /**
3520 * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
3521 * @rq: BSG request that holds the job to be destroyed
3522 */
3523 static void fc_bsg_softirq_done(struct request *rq)
3524 {
3525 struct fc_bsg_job *job = rq->special;
3526 unsigned long flags;
3527
3528 spin_lock_irqsave(&job->job_lock, flags);
3529 job->state_flags |= FC_RQST_STATE_DONE;
3530 job->ref_cnt--;
3531 spin_unlock_irqrestore(&job->job_lock, flags);
3532
3533 blk_end_request_all(rq, rq->errors);
3534 fc_destroy_bsgjob(job);
3535 }
3536
3537 /**
3538 * fc_bsg_job_timeout - handler for when a bsg request timesout
3539 * @req: request that timed out
3540 */
3541 static enum blk_eh_timer_return
3542 fc_bsg_job_timeout(struct request *req)
3543 {
3544 struct fc_bsg_job *job = (void *) req->special;
3545 struct Scsi_Host *shost = job->shost;
3546 struct fc_internal *i = to_fc_internal(shost->transportt);
3547 unsigned long flags;
3548 int err = 0, done = 0;
3549
3550 if (job->rport && job->rport->port_state == FC_PORTSTATE_BLOCKED)
3551 return BLK_EH_RESET_TIMER;
3552
3553 spin_lock_irqsave(&job->job_lock, flags);
3554 if (job->state_flags & FC_RQST_STATE_DONE)
3555 done = 1;
3556 else
3557 job->ref_cnt++;
3558 spin_unlock_irqrestore(&job->job_lock, flags);
3559
3560 if (!done && i->f->bsg_timeout) {
3561 /* call LLDD to abort the i/o as it has timed out */
3562 err = i->f->bsg_timeout(job);
3563 if (err == -EAGAIN) {
3564 job->ref_cnt--;
3565 return BLK_EH_RESET_TIMER;
3566 } else if (err)
3567 printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
3568 "abort failed with status %d\n", err);
3569 }
3570
3571 /* the blk_end_sync_io() doesn't check the error */
3572 if (done)
3573 return BLK_EH_NOT_HANDLED;
3574 else
3575 return BLK_EH_HANDLED;
3576 }
3577
3578 static int
3579 fc_bsg_map_buffer(struct fc_bsg_buffer *buf, struct request *req)
3580 {
3581 size_t sz = (sizeof(struct scatterlist) * req->nr_phys_segments);
3582
3583 BUG_ON(!req->nr_phys_segments);
3584
3585 buf->sg_list = kzalloc(sz, GFP_KERNEL);
3586 if (!buf->sg_list)
3587 return -ENOMEM;
3588 sg_init_table(buf->sg_list, req->nr_phys_segments);
3589 buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list);
3590 buf->payload_len = blk_rq_bytes(req);
3591 return 0;
3592 }
3593
3594
3595 /**
3596 * fc_req_to_bsgjob - Allocate/create the fc_bsg_job structure for the
3597 * bsg request
3598 * @shost: SCSI Host corresponding to the bsg object
3599 * @rport: (optional) FC Remote Port corresponding to the bsg object
3600 * @req: BSG request that needs a job structure
3601 */
3602 static int
3603 fc_req_to_bsgjob(struct Scsi_Host *shost, struct fc_rport *rport,
3604 struct request *req)
3605 {
3606 struct fc_internal *i = to_fc_internal(shost->transportt);
3607 struct request *rsp = req->next_rq;
3608 struct fc_bsg_job *job;
3609 int ret;
3610
3611 BUG_ON(req->special);
3612
3613 job = kzalloc(sizeof(struct fc_bsg_job) + i->f->dd_bsg_size,
3614 GFP_KERNEL);
3615 if (!job)
3616 return -ENOMEM;
3617
3618 /*
3619 * Note: this is a bit silly.
3620 * The request gets formatted as a SGIO v4 ioctl request, which
3621 * then gets reformatted as a blk request, which then gets
3622 * reformatted as a fc bsg request. And on completion, we have
3623 * to wrap return results such that SGIO v4 thinks it was a scsi
3624 * status. I hope this was all worth it.
3625 */
3626
3627 req->special = job;
3628 job->shost = shost;
3629 job->rport = rport;
3630 job->req = req;
3631 if (i->f->dd_bsg_size)
3632 job->dd_data = (void *)&job[1];
3633 spin_lock_init(&job->job_lock);
3634 job->request = (struct fc_bsg_request *)req->cmd;
3635 job->request_len = req->cmd_len;
3636 job->reply = req->sense;
3637 job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer
3638 * allocated */
3639 if (req->bio) {
3640 ret = fc_bsg_map_buffer(&job->request_payload, req);
3641 if (ret)
3642 goto failjob_rls_job;
3643 }
3644 if (rsp && rsp->bio) {
3645 ret = fc_bsg_map_buffer(&job->reply_payload, rsp);
3646 if (ret)
3647 goto failjob_rls_rqst_payload;
3648 }
3649 job->job_done = fc_bsg_jobdone;
3650 if (rport)
3651 job->dev = &rport->dev;
3652 else
3653 job->dev = &shost->shost_gendev;
3654 get_device(job->dev); /* take a reference for the request */
3655
3656 job->ref_cnt = 1;
3657
3658 return 0;
3659
3660
3661 failjob_rls_rqst_payload:
3662 kfree(job->request_payload.sg_list);
3663 failjob_rls_job:
3664 kfree(job);
3665 return -ENOMEM;
3666 }
3667
3668
3669 enum fc_dispatch_result {
3670 FC_DISPATCH_BREAK, /* on return, q is locked, break from q loop */
3671 FC_DISPATCH_LOCKED, /* on return, q is locked, continue on */
3672 FC_DISPATCH_UNLOCKED, /* on return, q is unlocked, continue on */
3673 };
3674
3675
3676 /**
3677 * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
3678 * @q: fc host request queue
3679 * @shost: scsi host rport attached to
3680 * @job: bsg job to be processed
3681 */
3682 static enum fc_dispatch_result
3683 fc_bsg_host_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3684 struct fc_bsg_job *job)
3685 {
3686 struct fc_internal *i = to_fc_internal(shost->transportt);
3687 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3688 int ret;
3689
3690 /* Validate the host command */
3691 switch (job->request->msgcode) {
3692 case FC_BSG_HST_ADD_RPORT:
3693 cmdlen += sizeof(struct fc_bsg_host_add_rport);
3694 break;
3695
3696 case FC_BSG_HST_DEL_RPORT:
3697 cmdlen += sizeof(struct fc_bsg_host_del_rport);
3698 break;
3699
3700 case FC_BSG_HST_ELS_NOLOGIN:
3701 cmdlen += sizeof(struct fc_bsg_host_els);
3702 /* there better be a xmt and rcv payloads */
3703 if ((!job->request_payload.payload_len) ||
3704 (!job->reply_payload.payload_len)) {
3705 ret = -EINVAL;
3706 goto fail_host_msg;
3707 }
3708 break;
3709
3710 case FC_BSG_HST_CT:
3711 cmdlen += sizeof(struct fc_bsg_host_ct);
3712 /* there better be xmt and rcv payloads */
3713 if ((!job->request_payload.payload_len) ||
3714 (!job->reply_payload.payload_len)) {
3715 ret = -EINVAL;
3716 goto fail_host_msg;
3717 }
3718 break;
3719
3720 case FC_BSG_HST_VENDOR:
3721 cmdlen += sizeof(struct fc_bsg_host_vendor);
3722 if ((shost->hostt->vendor_id == 0L) ||
3723 (job->request->rqst_data.h_vendor.vendor_id !=
3724 shost->hostt->vendor_id)) {
3725 ret = -ESRCH;
3726 goto fail_host_msg;
3727 }
3728 break;
3729
3730 default:
3731 ret = -EBADR;
3732 goto fail_host_msg;
3733 }
3734
3735 /* check if we really have all the request data needed */
3736 if (job->request_len < cmdlen) {
3737 ret = -ENOMSG;
3738 goto fail_host_msg;
3739 }
3740
3741 ret = i->f->bsg_request(job);
3742 if (!ret)
3743 return FC_DISPATCH_UNLOCKED;
3744
3745 fail_host_msg:
3746 /* return the errno failure code as the only status */
3747 BUG_ON(job->reply_len < sizeof(uint32_t));
3748 job->reply->reply_payload_rcv_len = 0;
3749 job->reply->result = ret;
3750 job->reply_len = sizeof(uint32_t);
3751 fc_bsg_jobdone(job);
3752 return FC_DISPATCH_UNLOCKED;
3753 }
3754
3755
3756 /*
3757 * fc_bsg_goose_queue - restart rport queue in case it was stopped
3758 * @rport: rport to be restarted
3759 */
3760 static void
3761 fc_bsg_goose_queue(struct fc_rport *rport)
3762 {
3763 int flagset;
3764 unsigned long flags;
3765
3766 if (!rport->rqst_q)
3767 return;
3768
3769 get_device(&rport->dev);
3770
3771 spin_lock_irqsave(rport->rqst_q->queue_lock, flags);
3772 flagset = test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags) &&
3773 !test_bit(QUEUE_FLAG_REENTER, &rport->rqst_q->queue_flags);
3774 if (flagset)
3775 queue_flag_set(QUEUE_FLAG_REENTER, rport->rqst_q);
3776 __blk_run_queue(rport->rqst_q);
3777 if (flagset)
3778 queue_flag_clear(QUEUE_FLAG_REENTER, rport->rqst_q);
3779 spin_unlock_irqrestore(rport->rqst_q->queue_lock, flags);
3780
3781 put_device(&rport->dev);
3782 }
3783
3784
3785 /**
3786 * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
3787 * @q: rport request queue
3788 * @shost: scsi host rport attached to
3789 * @rport: rport request destined to
3790 * @job: bsg job to be processed
3791 */
3792 static enum fc_dispatch_result
3793 fc_bsg_rport_dispatch(struct request_queue *q, struct Scsi_Host *shost,
3794 struct fc_rport *rport, struct fc_bsg_job *job)
3795 {
3796 struct fc_internal *i = to_fc_internal(shost->transportt);
3797 int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
3798 int ret;
3799
3800 /* Validate the rport command */
3801 switch (job->request->msgcode) {
3802 case FC_BSG_RPT_ELS:
3803 cmdlen += sizeof(struct fc_bsg_rport_els);
3804 goto check_bidi;
3805
3806 case FC_BSG_RPT_CT:
3807 cmdlen += sizeof(struct fc_bsg_rport_ct);
3808 check_bidi:
3809 /* there better be xmt and rcv payloads */
3810 if ((!job->request_payload.payload_len) ||
3811 (!job->reply_payload.payload_len)) {
3812 ret = -EINVAL;
3813 goto fail_rport_msg;
3814 }
3815 break;
3816 default:
3817 ret = -EBADR;
3818 goto fail_rport_msg;
3819 }
3820
3821 /* check if we really have all the request data needed */
3822 if (job->request_len < cmdlen) {
3823 ret = -ENOMSG;
3824 goto fail_rport_msg;
3825 }
3826
3827 ret = i->f->bsg_request(job);
3828 if (!ret)
3829 return FC_DISPATCH_UNLOCKED;
3830
3831 fail_rport_msg:
3832 /* return the errno failure code as the only status */
3833 BUG_ON(job->reply_len < sizeof(uint32_t));
3834 job->reply->reply_payload_rcv_len = 0;
3835 job->reply->result = ret;
3836 job->reply_len = sizeof(uint32_t);
3837 fc_bsg_jobdone(job);
3838 return FC_DISPATCH_UNLOCKED;
3839 }
3840
3841
3842 /**
3843 * fc_bsg_request_handler - generic handler for bsg requests
3844 * @q: request queue to manage
3845 * @shost: Scsi_Host related to the bsg object
3846 * @rport: FC remote port related to the bsg object (optional)
3847 * @dev: device structure for bsg object
3848 */
3849 static void
3850 fc_bsg_request_handler(struct request_queue *q, struct Scsi_Host *shost,
3851 struct fc_rport *rport, struct device *dev)
3852 {
3853 struct request *req;
3854 struct fc_bsg_job *job;
3855 enum fc_dispatch_result ret;
3856
3857 if (!get_device(dev))
3858 return;
3859
3860 while (!blk_queue_plugged(q)) {
3861 if (rport && (rport->port_state == FC_PORTSTATE_BLOCKED) &&
3862 !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
3863 break;
3864
3865 req = blk_fetch_request(q);
3866 if (!req)
3867 break;
3868
3869 if (rport && (rport->port_state != FC_PORTSTATE_ONLINE)) {
3870 req->errors = -ENXIO;
3871 spin_unlock_irq(q->queue_lock);
3872 blk_end_request_all(req, -ENXIO);
3873 spin_lock_irq(q->queue_lock);
3874 continue;
3875 }
3876
3877 spin_unlock_irq(q->queue_lock);
3878
3879 ret = fc_req_to_bsgjob(shost, rport, req);
3880 if (ret) {
3881 req->errors = ret;
3882 blk_end_request_all(req, ret);
3883 spin_lock_irq(q->queue_lock);
3884 continue;
3885 }
3886
3887 job = req->special;
3888
3889 /* check if we have the msgcode value at least */
3890 if (job->request_len < sizeof(uint32_t)) {
3891 BUG_ON(job->reply_len < sizeof(uint32_t));
3892 job->reply->reply_payload_rcv_len = 0;
3893 job->reply->result = -ENOMSG;
3894 job->reply_len = sizeof(uint32_t);
3895 fc_bsg_jobdone(job);
3896 spin_lock_irq(q->queue_lock);
3897 continue;
3898 }
3899
3900 /* the dispatch routines will unlock the queue_lock */
3901 if (rport)
3902 ret = fc_bsg_rport_dispatch(q, shost, rport, job);
3903 else
3904 ret = fc_bsg_host_dispatch(q, shost, job);
3905
3906 /* did dispatcher hit state that can't process any more */
3907 if (ret == FC_DISPATCH_BREAK)
3908 break;
3909
3910 /* did dispatcher had released the lock */
3911 if (ret == FC_DISPATCH_UNLOCKED)
3912 spin_lock_irq(q->queue_lock);
3913 }
3914
3915 spin_unlock_irq(q->queue_lock);
3916 put_device(dev);
3917 spin_lock_irq(q->queue_lock);
3918 }
3919
3920
3921 /**
3922 * fc_bsg_host_handler - handler for bsg requests for a fc host
3923 * @q: fc host request queue
3924 */
3925 static void
3926 fc_bsg_host_handler(struct request_queue *q)
3927 {
3928 struct Scsi_Host *shost = q->queuedata;
3929
3930 fc_bsg_request_handler(q, shost, NULL, &shost->shost_gendev);
3931 }
3932
3933
3934 /**
3935 * fc_bsg_rport_handler - handler for bsg requests for a fc rport
3936 * @q: rport request queue
3937 */
3938 static void
3939 fc_bsg_rport_handler(struct request_queue *q)
3940 {
3941 struct fc_rport *rport = q->queuedata;
3942 struct Scsi_Host *shost = rport_to_shost(rport);
3943
3944 fc_bsg_request_handler(q, shost, rport, &rport->dev);
3945 }
3946
3947
3948 /**
3949 * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
3950 * @shost: shost for fc_host
3951 * @fc_host: fc_host adding the structures to
3952 */
3953 static int
3954 fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
3955 {
3956 struct device *dev = &shost->shost_gendev;
3957 struct fc_internal *i = to_fc_internal(shost->transportt);
3958 struct request_queue *q;
3959 int err;
3960 char bsg_name[20];
3961
3962 fc_host->rqst_q = NULL;
3963
3964 if (!i->f->bsg_request)
3965 return -ENOTSUPP;
3966
3967 snprintf(bsg_name, sizeof(bsg_name),
3968 "fc_host%d", shost->host_no);
3969
3970 q = __scsi_alloc_queue(shost, fc_bsg_host_handler);
3971 if (!q) {
3972 printk(KERN_ERR "fc_host%d: bsg interface failed to "
3973 "initialize - no request queue\n",
3974 shost->host_no);
3975 return -ENOMEM;
3976 }
3977
3978 q->queuedata = shost;
3979 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
3980 blk_queue_softirq_done(q, fc_bsg_softirq_done);
3981 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
3982 blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
3983
3984 err = bsg_register_queue(q, dev, bsg_name, NULL);
3985 if (err) {
3986 printk(KERN_ERR "fc_host%d: bsg interface failed to "
3987 "initialize - register queue\n",
3988 shost->host_no);
3989 blk_cleanup_queue(q);
3990 return err;
3991 }
3992
3993 fc_host->rqst_q = q;
3994 return 0;
3995 }
3996
3997
3998 /**
3999 * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
4000 * @shost: shost that rport is attached to
4001 * @rport: rport that the bsg hooks are being attached to
4002 */
4003 static int
4004 fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
4005 {
4006 struct device *dev = &rport->dev;
4007 struct fc_internal *i = to_fc_internal(shost->transportt);
4008 struct request_queue *q;
4009 int err;
4010
4011 rport->rqst_q = NULL;
4012
4013 if (!i->f->bsg_request)
4014 return -ENOTSUPP;
4015
4016 q = __scsi_alloc_queue(shost, fc_bsg_rport_handler);
4017 if (!q) {
4018 printk(KERN_ERR "%s: bsg interface failed to "
4019 "initialize - no request queue\n",
4020 dev->kobj.name);
4021 return -ENOMEM;
4022 }
4023
4024 q->queuedata = rport;
4025 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
4026 blk_queue_softirq_done(q, fc_bsg_softirq_done);
4027 blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
4028 blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
4029
4030 err = bsg_register_queue(q, dev, NULL, NULL);
4031 if (err) {
4032 printk(KERN_ERR "%s: bsg interface failed to "
4033 "initialize - register queue\n",
4034 dev->kobj.name);
4035 blk_cleanup_queue(q);
4036 return err;
4037 }
4038
4039 rport->rqst_q = q;
4040 return 0;
4041 }
4042
4043
4044 /**
4045 * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
4046 * @q: the request_queue that is to be torn down.
4047 */
4048 static void
4049 fc_bsg_remove(struct request_queue *q)
4050 {
4051 if (q) {
4052 bsg_unregister_queue(q);
4053 blk_cleanup_queue(q);
4054 }
4055 }
4056
4057
4058 /* Original Author: Martin Hicks */
4059 MODULE_AUTHOR("James Smart");
4060 MODULE_DESCRIPTION("FC Transport Attributes");
4061 MODULE_LICENSE("GPL");
4062
4063 module_init(fc_transport_init);
4064 module_exit(fc_transport_exit);
Tomato firmware and modifications.