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net: Refactor full duplex flow control resolution
[linux-2.6/mini2440.git] / drivers / scsi / scsi_transport_fc.c
blob1e71abf0607a12381881b453f1ccbd7e78cb8e3a
1 /*
2 * FiberChannel transport specific attributes exported to sysfs.
3 *
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * ========
21 *
22 * Copyright (C) 2004-2007 James Smart, Emulex Corporation
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
25 * Add vports, etc
26 *
27 */
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <scsi/scsi_device.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_fc.h>
34 #include <scsi/scsi_cmnd.h>
35 #include <linux/netlink.h>
36 #include <net/netlink.h>
37 #include <scsi/scsi_netlink_fc.h>
38 #include "scsi_priv.h"
39 #include "scsi_transport_fc_internal.h"
40
41 static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
42 static void fc_vport_sched_delete(struct work_struct *work);
43 static int fc_vport_setup(struct Scsi_Host *shost, int channel,
44 struct device *pdev, struct fc_vport_identifiers *ids,
45 struct fc_vport **vport);
46
47 /*
48 * Redefine so that we can have same named attributes in the
49 * sdev/starget/host objects.
50 */
51 #define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
52 struct device_attribute device_attr_##_prefix##_##_name = \
53 __ATTR(_name,_mode,_show,_store)
54
55 #define fc_enum_name_search(title, table_type, table) \
56 static const char *get_fc_##title##_name(enum table_type table_key) \
57 { \
58 int i; \
59 char *name = NULL; \
60 \
61 for (i = 0; i < ARRAY_SIZE(table); i++) { \
62 if (table[i].value == table_key) { \
63 name = table[i].name; \
64 break; \
65 } \
66 } \
67 return name; \
68 }
69
70 #define fc_enum_name_match(title, table_type, table) \
71 static int get_fc_##title##_match(const char *table_key, \
72 enum table_type *value) \
73 { \
74 int i; \
75 \
76 for (i = 0; i < ARRAY_SIZE(table); i++) { \
77 if (strncmp(table_key, table[i].name, \
78 table[i].matchlen) == 0) { \
79 *value = table[i].value; \
80 return 0; /* success */ \
81 } \
82 } \
83 return 1; /* failure */ \
84 }
85
86
87 /* Convert fc_port_type values to ascii string name */
88 static struct {
89 enum fc_port_type value;
90 char *name;
91 } fc_port_type_names[] = {
92 { FC_PORTTYPE_UNKNOWN, "Unknown" },
93 { FC_PORTTYPE_OTHER, "Other" },
94 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
95 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
96 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
97 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
98 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" },
99 { FC_PORTTYPE_NPIV, "NPIV VPORT" },
100 };
101 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
102 #define FC_PORTTYPE_MAX_NAMELEN 50
103
104 /* Reuse fc_port_type enum function for vport_type */
105 #define get_fc_vport_type_name get_fc_port_type_name
106
107
108 /* Convert fc_host_event_code values to ascii string name */
109 static const struct {
110 enum fc_host_event_code value;
111 char *name;
112 } fc_host_event_code_names[] = {
113 { FCH_EVT_LIP, "lip" },
114 { FCH_EVT_LINKUP, "link_up" },
115 { FCH_EVT_LINKDOWN, "link_down" },
116 { FCH_EVT_LIPRESET, "lip_reset" },
117 { FCH_EVT_RSCN, "rscn" },
118 { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" },
119 { FCH_EVT_PORT_UNKNOWN, "port_unknown" },
120 { FCH_EVT_PORT_ONLINE, "port_online" },
121 { FCH_EVT_PORT_OFFLINE, "port_offline" },
122 { FCH_EVT_PORT_FABRIC, "port_fabric" },
123 { FCH_EVT_LINK_UNKNOWN, "link_unknown" },
124 { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" },
125 };
126 fc_enum_name_search(host_event_code, fc_host_event_code,
127 fc_host_event_code_names)
128 #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30
129
130
131 /* Convert fc_port_state values to ascii string name */
132 static struct {
133 enum fc_port_state value;
134 char *name;
135 } fc_port_state_names[] = {
136 { FC_PORTSTATE_UNKNOWN, "Unknown" },
137 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
138 { FC_PORTSTATE_ONLINE, "Online" },
139 { FC_PORTSTATE_OFFLINE, "Offline" },
140 { FC_PORTSTATE_BLOCKED, "Blocked" },
141 { FC_PORTSTATE_BYPASSED, "Bypassed" },
142 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
143 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
144 { FC_PORTSTATE_ERROR, "Error" },
145 { FC_PORTSTATE_LOOPBACK, "Loopback" },
146 { FC_PORTSTATE_DELETED, "Deleted" },
147 };
148 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
149 #define FC_PORTSTATE_MAX_NAMELEN 20
150
151
152 /* Convert fc_vport_state values to ascii string name */
153 static struct {
154 enum fc_vport_state value;
155 char *name;
156 } fc_vport_state_names[] = {
157 { FC_VPORT_UNKNOWN, "Unknown" },
158 { FC_VPORT_ACTIVE, "Active" },
159 { FC_VPORT_DISABLED, "Disabled" },
160 { FC_VPORT_LINKDOWN, "Linkdown" },
161 { FC_VPORT_INITIALIZING, "Initializing" },
162 { FC_VPORT_NO_FABRIC_SUPP, "No Fabric Support" },
163 { FC_VPORT_NO_FABRIC_RSCS, "No Fabric Resources" },
164 { FC_VPORT_FABRIC_LOGOUT, "Fabric Logout" },
165 { FC_VPORT_FABRIC_REJ_WWN, "Fabric Rejected WWN" },
166 { FC_VPORT_FAILED, "VPort Failed" },
167 };
168 fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
169 #define FC_VPORTSTATE_MAX_NAMELEN 24
170
171 /* Reuse fc_vport_state enum function for vport_last_state */
172 #define get_fc_vport_last_state_name get_fc_vport_state_name
173
174
175 /* Convert fc_tgtid_binding_type values to ascii string name */
176 static const struct {
177 enum fc_tgtid_binding_type value;
178 char *name;
179 int matchlen;
180 } fc_tgtid_binding_type_names[] = {
181 { FC_TGTID_BIND_NONE, "none", 4 },
182 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
183 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
184 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
185 };
186 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
187 fc_tgtid_binding_type_names)
188 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
189 fc_tgtid_binding_type_names)
190 #define FC_BINDTYPE_MAX_NAMELEN 30
191
192
193 #define fc_bitfield_name_search(title, table) \
194 static ssize_t \
195 get_fc_##title##_names(u32 table_key, char *buf) \
196 { \
197 char *prefix = ""; \
198 ssize_t len = 0; \
199 int i; \
200 \
201 for (i = 0; i < ARRAY_SIZE(table); i++) { \
202 if (table[i].value & table_key) { \
203 len += sprintf(buf + len, "%s%s", \
204 prefix, table[i].name); \
205 prefix = ", "; \
206 } \
207 } \
208 len += sprintf(buf + len, "\n"); \
209 return len; \
210 }
211
212
213 /* Convert FC_COS bit values to ascii string name */
214 static const struct {
215 u32 value;
216 char *name;
217 } fc_cos_names[] = {
218 { FC_COS_CLASS1, "Class 1" },
219 { FC_COS_CLASS2, "Class 2" },
220 { FC_COS_CLASS3, "Class 3" },
221 { FC_COS_CLASS4, "Class 4" },
222 { FC_COS_CLASS6, "Class 6" },
223 };
224 fc_bitfield_name_search(cos, fc_cos_names)
225
226
227 /* Convert FC_PORTSPEED bit values to ascii string name */
228 static const struct {
229 u32 value;
230 char *name;
231 } fc_port_speed_names[] = {
232 { FC_PORTSPEED_1GBIT, "1 Gbit" },
233 { FC_PORTSPEED_2GBIT, "2 Gbit" },
234 { FC_PORTSPEED_4GBIT, "4 Gbit" },
235 { FC_PORTSPEED_10GBIT, "10 Gbit" },
236 { FC_PORTSPEED_8GBIT, "8 Gbit" },
237 { FC_PORTSPEED_16GBIT, "16 Gbit" },
238 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
239 };
240 fc_bitfield_name_search(port_speed, fc_port_speed_names)
241
242
243 static int
244 show_fc_fc4s (char *buf, u8 *fc4_list)
245 {
246 int i, len=0;
247
248 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
249 len += sprintf(buf + len , "0x%02x ", *fc4_list);
250 len += sprintf(buf + len, "\n");
251 return len;
252 }
253
254
255 /* Convert FC_PORT_ROLE bit values to ascii string name */
256 static const struct {
257 u32 value;
258 char *name;
259 } fc_port_role_names[] = {
260 { FC_PORT_ROLE_FCP_TARGET, "FCP Target" },
261 { FC_PORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
262 { FC_PORT_ROLE_IP_PORT, "IP Port" },
263 };
264 fc_bitfield_name_search(port_roles, fc_port_role_names)
265
266 /*
267 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
268 */
269 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
270 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
271 #define FC_FPORT_PORTID 0x00000e
272 #define FC_FABCTLR_PORTID 0x00000d
273 #define FC_DIRSRVR_PORTID 0x00000c
274 #define FC_TIMESRVR_PORTID 0x00000b
275 #define FC_MGMTSRVR_PORTID 0x00000a
276
277
278 static void fc_timeout_deleted_rport(struct work_struct *work);
279 static void fc_timeout_fail_rport_io(struct work_struct *work);
280 static void fc_scsi_scan_rport(struct work_struct *work);
281
282 /*
283 * Attribute counts pre object type...
284 * Increase these values if you add attributes
285 */
286 #define FC_STARGET_NUM_ATTRS 3
287 #define FC_RPORT_NUM_ATTRS 10
288 #define FC_VPORT_NUM_ATTRS 9
289 #define FC_HOST_NUM_ATTRS 21
290
291 struct fc_internal {
292 struct scsi_transport_template t;
293 struct fc_function_template *f;
294
295 /*
296 * For attributes : each object has :
297 * An array of the actual attributes structures
298 * An array of null-terminated pointers to the attribute
299 * structures - used for mid-layer interaction.
300 *
301 * The attribute containers for the starget and host are are
302 * part of the midlayer. As the remote port is specific to the
303 * fc transport, we must provide the attribute container.
304 */
305 struct device_attribute private_starget_attrs[
306 FC_STARGET_NUM_ATTRS];
307 struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
308
309 struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
310 struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
311
312 struct transport_container rport_attr_cont;
313 struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
314 struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
315
316 struct transport_container vport_attr_cont;
317 struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
318 struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
319 };
320
321 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
322
323 static int fc_target_setup(struct transport_container *tc, struct device *dev,
324 struct device *cdev)
325 {
326 struct scsi_target *starget = to_scsi_target(dev);
327 struct fc_rport *rport = starget_to_rport(starget);
328
329 /*
330 * if parent is remote port, use values from remote port.
331 * Otherwise, this host uses the fc_transport, but not the
332 * remote port interface. As such, initialize to known non-values.
333 */
334 if (rport) {
335 fc_starget_node_name(starget) = rport->node_name;
336 fc_starget_port_name(starget) = rport->port_name;
337 fc_starget_port_id(starget) = rport->port_id;
338 } else {
339 fc_starget_node_name(starget) = -1;
340 fc_starget_port_name(starget) = -1;
341 fc_starget_port_id(starget) = -1;
342 }
343
344 return 0;
345 }
346
347 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
348 "fc_transport",
349 fc_target_setup,
350 NULL,
351 NULL);
352
353 static int fc_host_setup(struct transport_container *tc, struct device *dev,
354 struct device *cdev)
355 {
356 struct Scsi_Host *shost = dev_to_shost(dev);
357 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
358
359 /*
360 * Set default values easily detected by the midlayer as
361 * failure cases. The scsi lldd is responsible for initializing
362 * all transport attributes to valid values per host.
363 */
364 fc_host->node_name = -1;
365 fc_host->port_name = -1;
366 fc_host->permanent_port_name = -1;
367 fc_host->supported_classes = FC_COS_UNSPECIFIED;
368 memset(fc_host->supported_fc4s, 0,
369 sizeof(fc_host->supported_fc4s));
370 fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
371 fc_host->maxframe_size = -1;
372 fc_host->max_npiv_vports = 0;
373 memset(fc_host->serial_number, 0,
374 sizeof(fc_host->serial_number));
375
376 fc_host->port_id = -1;
377 fc_host->port_type = FC_PORTTYPE_UNKNOWN;
378 fc_host->port_state = FC_PORTSTATE_UNKNOWN;
379 memset(fc_host->active_fc4s, 0,
380 sizeof(fc_host->active_fc4s));
381 fc_host->speed = FC_PORTSPEED_UNKNOWN;
382 fc_host->fabric_name = -1;
383 memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
384 memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
385
386 fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
387
388 INIT_LIST_HEAD(&fc_host->rports);
389 INIT_LIST_HEAD(&fc_host->rport_bindings);
390 INIT_LIST_HEAD(&fc_host->vports);
391 fc_host->next_rport_number = 0;
392 fc_host->next_target_id = 0;
393 fc_host->next_vport_number = 0;
394 fc_host->npiv_vports_inuse = 0;
395
396 snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
397 "fc_wq_%d", shost->host_no);
398 fc_host->work_q = create_singlethread_workqueue(
399 fc_host->work_q_name);
400 if (!fc_host->work_q)
401 return -ENOMEM;
402
403 snprintf(fc_host->devloss_work_q_name,
404 sizeof(fc_host->devloss_work_q_name),
405 "fc_dl_%d", shost->host_no);
406 fc_host->devloss_work_q = create_singlethread_workqueue(
407 fc_host->devloss_work_q_name);
408 if (!fc_host->devloss_work_q) {
409 destroy_workqueue(fc_host->work_q);
410 fc_host->work_q = NULL;
411 return -ENOMEM;
412 }
413
414 return 0;
415 }
416
417 static DECLARE_TRANSPORT_CLASS(fc_host_class,
418 "fc_host",
419 fc_host_setup,
420 NULL,
421 NULL);
422
423 /*
424 * Setup and Remove actions for remote ports are handled
425 * in the service functions below.
426 */
427 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
428 "fc_remote_ports",
429 NULL,
430 NULL,
431 NULL);
432
433 /*
434 * Setup and Remove actions for virtual ports are handled
435 * in the service functions below.
436 */
437 static DECLARE_TRANSPORT_CLASS(fc_vport_class,
438 "fc_vports",
439 NULL,
440 NULL,
441 NULL);
442
443 /*
444 * Module Parameters
445 */
446
447 /*
448 * dev_loss_tmo: the default number of seconds that the FC transport
449 * should insulate the loss of a remote port.
450 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
451 */
452 static unsigned int fc_dev_loss_tmo = 60; /* seconds */
453
454 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
455 MODULE_PARM_DESC(dev_loss_tmo,
456 "Maximum number of seconds that the FC transport should"
457 " insulate the loss of a remote port. Once this value is"
458 " exceeded, the scsi target is removed. Value should be"
459 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
460
461 /*
462 * Netlink Infrastructure
463 */
464
465 static atomic_t fc_event_seq;
466
467 /**
468 * fc_get_event_number - Obtain the next sequential FC event number
469 *
470 * Notes:
471 * We could have inlined this, but it would have required fc_event_seq to
472 * be exposed. For now, live with the subroutine call.
473 * Atomic used to avoid lock/unlock...
474 */
475 u32
476 fc_get_event_number(void)
477 {
478 return atomic_add_return(1, &fc_event_seq);
479 }
480 EXPORT_SYMBOL(fc_get_event_number);
481
482
483 /**
484 * fc_host_post_event - called to post an even on an fc_host.
485 * @shost: host the event occurred on
486 * @event_number: fc event number obtained from get_fc_event_number()
487 * @event_code: fc_host event being posted
488 * @event_data: 32bits of data for the event being posted
489 *
490 * Notes:
491 * This routine assumes no locks are held on entry.
492 */
493 void
494 fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
495 enum fc_host_event_code event_code, u32 event_data)
496 {
497 struct sk_buff *skb;
498 struct nlmsghdr *nlh;
499 struct fc_nl_event *event;
500 const char *name;
501 u32 len, skblen;
502 int err;
503
504 if (!scsi_nl_sock) {
505 err = -ENOENT;
506 goto send_fail;
507 }
508
509 len = FC_NL_MSGALIGN(sizeof(*event));
510 skblen = NLMSG_SPACE(len);
511
512 skb = alloc_skb(skblen, GFP_KERNEL);
513 if (!skb) {
514 err = -ENOBUFS;
515 goto send_fail;
516 }
517
518 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
519 skblen - sizeof(*nlh), 0);
520 if (!nlh) {
521 err = -ENOBUFS;
522 goto send_fail_skb;
523 }
524 event = NLMSG_DATA(nlh);
525
526 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
527 FC_NL_ASYNC_EVENT, len);
528 event->seconds = get_seconds();
529 event->vendor_id = 0;
530 event->host_no = shost->host_no;
531 event->event_datalen = sizeof(u32); /* bytes */
532 event->event_num = event_number;
533 event->event_code = event_code;
534 event->event_data = event_data;
535
536 err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
537 GFP_KERNEL);
538 if (err && (err != -ESRCH)) /* filter no recipient errors */
539 /* nlmsg_multicast already kfree_skb'd */
540 goto send_fail;
541
542 return;
543
544 send_fail_skb:
545 kfree_skb(skb);
546 send_fail:
547 name = get_fc_host_event_code_name(event_code);
548 printk(KERN_WARNING
549 "%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
550 __func__, shost->host_no,
551 (name) ? name : "<unknown>", event_data, err);
552 return;
553 }
554 EXPORT_SYMBOL(fc_host_post_event);
555
556
557 /**
558 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
559 * @shost: host the event occurred on
560 * @event_number: fc event number obtained from get_fc_event_number()
561 * @data_len: amount, in bytes, of vendor unique data
562 * @data_buf: pointer to vendor unique data
563 * @vendor_id: Vendor id
564 *
565 * Notes:
566 * This routine assumes no locks are held on entry.
567 */
568 void
569 fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
570 u32 data_len, char * data_buf, u64 vendor_id)
571 {
572 struct sk_buff *skb;
573 struct nlmsghdr *nlh;
574 struct fc_nl_event *event;
575 u32 len, skblen;
576 int err;
577
578 if (!scsi_nl_sock) {
579 err = -ENOENT;
580 goto send_vendor_fail;
581 }
582
583 len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
584 skblen = NLMSG_SPACE(len);
585
586 skb = alloc_skb(skblen, GFP_KERNEL);
587 if (!skb) {
588 err = -ENOBUFS;
589 goto send_vendor_fail;
590 }
591
592 nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
593 skblen - sizeof(*nlh), 0);
594 if (!nlh) {
595 err = -ENOBUFS;
596 goto send_vendor_fail_skb;
597 }
598 event = NLMSG_DATA(nlh);
599
600 INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
601 FC_NL_ASYNC_EVENT, len);
602 event->seconds = get_seconds();
603 event->vendor_id = vendor_id;
604 event->host_no = shost->host_no;
605 event->event_datalen = data_len; /* bytes */
606 event->event_num = event_number;
607 event->event_code = FCH_EVT_VENDOR_UNIQUE;
608 memcpy(&event->event_data, data_buf, data_len);
609
610 err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
611 GFP_KERNEL);
612 if (err && (err != -ESRCH)) /* filter no recipient errors */
613 /* nlmsg_multicast already kfree_skb'd */
614 goto send_vendor_fail;
615
616 return;
617
618 send_vendor_fail_skb:
619 kfree_skb(skb);
620 send_vendor_fail:
621 printk(KERN_WARNING
622 "%s: Dropped Event : host %d vendor_unique - err %d\n",
623 __func__, shost->host_no, err);
624 return;
625 }
626 EXPORT_SYMBOL(fc_host_post_vendor_event);
627
628
629
630 static __init int fc_transport_init(void)
631 {
632 int error;
633
634 atomic_set(&fc_event_seq, 0);
635
636 error = transport_class_register(&fc_host_class);
637 if (error)
638 return error;
639 error = transport_class_register(&fc_vport_class);
640 if (error)
641 return error;
642 error = transport_class_register(&fc_rport_class);
643 if (error)
644 return error;
645 return transport_class_register(&fc_transport_class);
646 }
647
648 static void __exit fc_transport_exit(void)
649 {
650 transport_class_unregister(&fc_transport_class);
651 transport_class_unregister(&fc_rport_class);
652 transport_class_unregister(&fc_host_class);
653 transport_class_unregister(&fc_vport_class);
654 }
655
656 /*
657 * FC Remote Port Attribute Management
658 */
659
660 #define fc_rport_show_function(field, format_string, sz, cast) \
661 static ssize_t \
662 show_fc_rport_##field (struct device *dev, \
663 struct device_attribute *attr, char *buf) \
664 { \
665 struct fc_rport *rport = transport_class_to_rport(dev); \
666 struct Scsi_Host *shost = rport_to_shost(rport); \
667 struct fc_internal *i = to_fc_internal(shost->transportt); \
668 if ((i->f->get_rport_##field) && \
669 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
670 (rport->port_state == FC_PORTSTATE_DELETED) || \
671 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
672 i->f->get_rport_##field(rport); \
673 return snprintf(buf, sz, format_string, cast rport->field); \
674 }
675
676 #define fc_rport_store_function(field) \
677 static ssize_t \
678 store_fc_rport_##field(struct device *dev, \
679 struct device_attribute *attr, \
680 const char *buf, size_t count) \
681 { \
682 int val; \
683 struct fc_rport *rport = transport_class_to_rport(dev); \
684 struct Scsi_Host *shost = rport_to_shost(rport); \
685 struct fc_internal *i = to_fc_internal(shost->transportt); \
686 char *cp; \
687 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
688 (rport->port_state == FC_PORTSTATE_DELETED) || \
689 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
690 return -EBUSY; \
691 val = simple_strtoul(buf, &cp, 0); \
692 if (*cp && (*cp != '\n')) \
693 return -EINVAL; \
694 i->f->set_rport_##field(rport, val); \
695 return count; \
696 }
697
698 #define fc_rport_rd_attr(field, format_string, sz) \
699 fc_rport_show_function(field, format_string, sz, ) \
700 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
701 show_fc_rport_##field, NULL)
702
703 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
704 fc_rport_show_function(field, format_string, sz, (cast)) \
705 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
706 show_fc_rport_##field, NULL)
707
708 #define fc_rport_rw_attr(field, format_string, sz) \
709 fc_rport_show_function(field, format_string, sz, ) \
710 fc_rport_store_function(field) \
711 static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
712 show_fc_rport_##field, \
713 store_fc_rport_##field)
714
715
716 #define fc_private_rport_show_function(field, format_string, sz, cast) \
717 static ssize_t \
718 show_fc_rport_##field (struct device *dev, \
719 struct device_attribute *attr, char *buf) \
720 { \
721 struct fc_rport *rport = transport_class_to_rport(dev); \
722 return snprintf(buf, sz, format_string, cast rport->field); \
723 }
724
725 #define fc_private_rport_rd_attr(field, format_string, sz) \
726 fc_private_rport_show_function(field, format_string, sz, ) \
727 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
728 show_fc_rport_##field, NULL)
729
730 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
731 fc_private_rport_show_function(field, format_string, sz, (cast)) \
732 static FC_DEVICE_ATTR(rport, field, S_IRUGO, \
733 show_fc_rport_##field, NULL)
734
735
736 #define fc_private_rport_rd_enum_attr(title, maxlen) \
737 static ssize_t \
738 show_fc_rport_##title (struct device *dev, \
739 struct device_attribute *attr, char *buf) \
740 { \
741 struct fc_rport *rport = transport_class_to_rport(dev); \
742 const char *name; \
743 name = get_fc_##title##_name(rport->title); \
744 if (!name) \
745 return -EINVAL; \
746 return snprintf(buf, maxlen, "%s\n", name); \
747 } \
748 static FC_DEVICE_ATTR(rport, title, S_IRUGO, \
749 show_fc_rport_##title, NULL)
750
751
752 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
753 i->private_rport_attrs[count] = device_attr_rport_##field; \
754 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
755 i->private_rport_attrs[count].store = NULL; \
756 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
757 if (i->f->show_rport_##field) \
758 count++
759
760 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
761 i->private_rport_attrs[count] = device_attr_rport_##field; \
762 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
763 i->private_rport_attrs[count].store = NULL; \
764 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
765 count++
766
767 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
768 i->private_rport_attrs[count] = device_attr_rport_##field; \
769 if (!i->f->set_rport_##field) { \
770 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
771 i->private_rport_attrs[count].store = NULL; \
772 } \
773 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
774 if (i->f->show_rport_##field) \
775 count++
776
777 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \
778 { \
779 i->private_rport_attrs[count] = device_attr_rport_##field; \
780 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
781 count++; \
782 }
783
784
785 /* The FC Transport Remote Port Attributes: */
786
787 /* Fixed Remote Port Attributes */
788
789 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
790
791 static ssize_t
792 show_fc_rport_supported_classes (struct device *dev,
793 struct device_attribute *attr, char *buf)
794 {
795 struct fc_rport *rport = transport_class_to_rport(dev);
796 if (rport->supported_classes == FC_COS_UNSPECIFIED)
797 return snprintf(buf, 20, "unspecified\n");
798 return get_fc_cos_names(rport->supported_classes, buf);
799 }
800 static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
801 show_fc_rport_supported_classes, NULL);
802
803 /* Dynamic Remote Port Attributes */
804
805 /*
806 * dev_loss_tmo attribute
807 */
808 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
809 static ssize_t
810 store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
811 const char *buf, size_t count)
812 {
813 int val;
814 struct fc_rport *rport = transport_class_to_rport(dev);
815 struct Scsi_Host *shost = rport_to_shost(rport);
816 struct fc_internal *i = to_fc_internal(shost->transportt);
817 char *cp;
818 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
819 (rport->port_state == FC_PORTSTATE_DELETED) ||
820 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
821 return -EBUSY;
822 val = simple_strtoul(buf, &cp, 0);
823 if ((*cp && (*cp != '\n')) ||
824 (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
825 return -EINVAL;
826 i->f->set_rport_dev_loss_tmo(rport, val);
827 return count;
828 }
829 static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
830 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
831
832
833 /* Private Remote Port Attributes */
834
835 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
836 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
837 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
838
839 static ssize_t
840 show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
841 char *buf)
842 {
843 struct fc_rport *rport = transport_class_to_rport(dev);
844
845 /* identify any roles that are port_id specific */
846 if ((rport->port_id != -1) &&
847 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
848 FC_WELLKNOWN_PORTID_MASK) {
849 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
850 case FC_FPORT_PORTID:
851 return snprintf(buf, 30, "Fabric Port\n");
852 case FC_FABCTLR_PORTID:
853 return snprintf(buf, 30, "Fabric Controller\n");
854 case FC_DIRSRVR_PORTID:
855 return snprintf(buf, 30, "Directory Server\n");
856 case FC_TIMESRVR_PORTID:
857 return snprintf(buf, 30, "Time Server\n");
858 case FC_MGMTSRVR_PORTID:
859 return snprintf(buf, 30, "Management Server\n");
860 default:
861 return snprintf(buf, 30, "Unknown Fabric Entity\n");
862 }
863 } else {
864 if (rport->roles == FC_PORT_ROLE_UNKNOWN)
865 return snprintf(buf, 20, "unknown\n");
866 return get_fc_port_roles_names(rport->roles, buf);
867 }
868 }
869 static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
870 show_fc_rport_roles, NULL);
871
872 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
873 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
874
875 /*
876 * fast_io_fail_tmo attribute
877 */
878 static ssize_t
879 show_fc_rport_fast_io_fail_tmo (struct device *dev,
880 struct device_attribute *attr, char *buf)
881 {
882 struct fc_rport *rport = transport_class_to_rport(dev);
883
884 if (rport->fast_io_fail_tmo == -1)
885 return snprintf(buf, 5, "off\n");
886 return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
887 }
888
889 static ssize_t
890 store_fc_rport_fast_io_fail_tmo(struct device *dev,
891 struct device_attribute *attr, const char *buf,
892 size_t count)
893 {
894 int val;
895 char *cp;
896 struct fc_rport *rport = transport_class_to_rport(dev);
897
898 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
899 (rport->port_state == FC_PORTSTATE_DELETED) ||
900 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
901 return -EBUSY;
902 if (strncmp(buf, "off", 3) == 0)
903 rport->fast_io_fail_tmo = -1;
904 else {
905 val = simple_strtoul(buf, &cp, 0);
906 if ((*cp && (*cp != '\n')) ||
907 (val < 0) || (val >= rport->dev_loss_tmo))
908 return -EINVAL;
909 rport->fast_io_fail_tmo = val;
910 }
911 return count;
912 }
913 static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
914 show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
915
916
917 /*
918 * FC SCSI Target Attribute Management
919 */
920
921 /*
922 * Note: in the target show function we recognize when the remote
923 * port is in the heirarchy and do not allow the driver to get
924 * involved in sysfs functions. The driver only gets involved if
925 * it's the "old" style that doesn't use rports.
926 */
927 #define fc_starget_show_function(field, format_string, sz, cast) \
928 static ssize_t \
929 show_fc_starget_##field (struct device *dev, \
930 struct device_attribute *attr, char *buf) \
931 { \
932 struct scsi_target *starget = transport_class_to_starget(dev); \
933 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
934 struct fc_internal *i = to_fc_internal(shost->transportt); \
935 struct fc_rport *rport = starget_to_rport(starget); \
936 if (rport) \
937 fc_starget_##field(starget) = rport->field; \
938 else if (i->f->get_starget_##field) \
939 i->f->get_starget_##field(starget); \
940 return snprintf(buf, sz, format_string, \
941 cast fc_starget_##field(starget)); \
942 }
943
944 #define fc_starget_rd_attr(field, format_string, sz) \
945 fc_starget_show_function(field, format_string, sz, ) \
946 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
947 show_fc_starget_##field, NULL)
948
949 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
950 fc_starget_show_function(field, format_string, sz, (cast)) \
951 static FC_DEVICE_ATTR(starget, field, S_IRUGO, \
952 show_fc_starget_##field, NULL)
953
954 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
955 i->private_starget_attrs[count] = device_attr_starget_##field; \
956 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
957 i->private_starget_attrs[count].store = NULL; \
958 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
959 if (i->f->show_starget_##field) \
960 count++
961
962 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
963 i->private_starget_attrs[count] = device_attr_starget_##field; \
964 if (!i->f->set_starget_##field) { \
965 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
966 i->private_starget_attrs[count].store = NULL; \
967 } \
968 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
969 if (i->f->show_starget_##field) \
970 count++
971
972 /* The FC Transport SCSI Target Attributes: */
973 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
974 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
975 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
976
977
978 /*
979 * FC Virtual Port Attribute Management
980 */
981
982 #define fc_vport_show_function(field, format_string, sz, cast) \
983 static ssize_t \
984 show_fc_vport_##field (struct device *dev, \
985 struct device_attribute *attr, char *buf) \
986 { \
987 struct fc_vport *vport = transport_class_to_vport(dev); \
988 struct Scsi_Host *shost = vport_to_shost(vport); \
989 struct fc_internal *i = to_fc_internal(shost->transportt); \
990 if ((i->f->get_vport_##field) && \
991 !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))) \
992 i->f->get_vport_##field(vport); \
993 return snprintf(buf, sz, format_string, cast vport->field); \
994 }
995
996 #define fc_vport_store_function(field) \
997 static ssize_t \
998 store_fc_vport_##field(struct device *dev, \
999 struct device_attribute *attr, \
1000 const char *buf, size_t count) \
1001 { \
1002 int val; \
1003 struct fc_vport *vport = transport_class_to_vport(dev); \
1004 struct Scsi_Host *shost = vport_to_shost(vport); \
1005 struct fc_internal *i = to_fc_internal(shost->transportt); \
1006 char *cp; \
1007 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1008 return -EBUSY; \
1009 val = simple_strtoul(buf, &cp, 0); \
1010 if (*cp && (*cp != '\n')) \
1011 return -EINVAL; \
1012 i->f->set_vport_##field(vport, val); \
1013 return count; \
1014 }
1015
1016 #define fc_vport_store_str_function(field, slen) \
1017 static ssize_t \
1018 store_fc_vport_##field(struct device *dev, \
1019 struct device_attribute *attr, \
1020 const char *buf, size_t count) \
1021 { \
1022 struct fc_vport *vport = transport_class_to_vport(dev); \
1023 struct Scsi_Host *shost = vport_to_shost(vport); \
1024 struct fc_internal *i = to_fc_internal(shost->transportt); \
1025 unsigned int cnt=count; \
1026 \
1027 /* count may include a LF at end of string */ \
1028 if (buf[cnt-1] == '\n') \
1029 cnt--; \
1030 if (cnt > ((slen) - 1)) \
1031 return -EINVAL; \
1032 memcpy(vport->field, buf, cnt); \
1033 i->f->set_vport_##field(vport); \
1034 return count; \
1035 }
1036
1037 #define fc_vport_rd_attr(field, format_string, sz) \
1038 fc_vport_show_function(field, format_string, sz, ) \
1039 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1040 show_fc_vport_##field, NULL)
1041
1042 #define fc_vport_rd_attr_cast(field, format_string, sz, cast) \
1043 fc_vport_show_function(field, format_string, sz, (cast)) \
1044 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1045 show_fc_vport_##field, NULL)
1046
1047 #define fc_vport_rw_attr(field, format_string, sz) \
1048 fc_vport_show_function(field, format_string, sz, ) \
1049 fc_vport_store_function(field) \
1050 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1051 show_fc_vport_##field, \
1052 store_fc_vport_##field)
1053
1054 #define fc_private_vport_show_function(field, format_string, sz, cast) \
1055 static ssize_t \
1056 show_fc_vport_##field (struct device *dev, \
1057 struct device_attribute *attr, char *buf) \
1058 { \
1059 struct fc_vport *vport = transport_class_to_vport(dev); \
1060 return snprintf(buf, sz, format_string, cast vport->field); \
1061 }
1062
1063 #define fc_private_vport_store_u32_function(field) \
1064 static ssize_t \
1065 store_fc_vport_##field(struct device *dev, \
1066 struct device_attribute *attr, \
1067 const char *buf, size_t count) \
1068 { \
1069 u32 val; \
1070 struct fc_vport *vport = transport_class_to_vport(dev); \
1071 char *cp; \
1072 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) \
1073 return -EBUSY; \
1074 val = simple_strtoul(buf, &cp, 0); \
1075 if (*cp && (*cp != '\n')) \
1076 return -EINVAL; \
1077 vport->field = val; \
1078 return count; \
1079 }
1080
1081
1082 #define fc_private_vport_rd_attr(field, format_string, sz) \
1083 fc_private_vport_show_function(field, format_string, sz, ) \
1084 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1085 show_fc_vport_##field, NULL)
1086
1087 #define fc_private_vport_rd_attr_cast(field, format_string, sz, cast) \
1088 fc_private_vport_show_function(field, format_string, sz, (cast)) \
1089 static FC_DEVICE_ATTR(vport, field, S_IRUGO, \
1090 show_fc_vport_##field, NULL)
1091
1092 #define fc_private_vport_rw_u32_attr(field, format_string, sz) \
1093 fc_private_vport_show_function(field, format_string, sz, ) \
1094 fc_private_vport_store_u32_function(field) \
1095 static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR, \
1096 show_fc_vport_##field, \
1097 store_fc_vport_##field)
1098
1099
1100 #define fc_private_vport_rd_enum_attr(title, maxlen) \
1101 static ssize_t \
1102 show_fc_vport_##title (struct device *dev, \
1103 struct device_attribute *attr, \
1104 char *buf) \
1105 { \
1106 struct fc_vport *vport = transport_class_to_vport(dev); \
1107 const char *name; \
1108 name = get_fc_##title##_name(vport->title); \
1109 if (!name) \
1110 return -EINVAL; \
1111 return snprintf(buf, maxlen, "%s\n", name); \
1112 } \
1113 static FC_DEVICE_ATTR(vport, title, S_IRUGO, \
1114 show_fc_vport_##title, NULL)
1115
1116
1117 #define SETUP_VPORT_ATTRIBUTE_RD(field) \
1118 i->private_vport_attrs[count] = device_attr_vport_##field; \
1119 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1120 i->private_vport_attrs[count].store = NULL; \
1121 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1122 if (i->f->get_##field) \
1123 count++
1124 /* NOTE: Above MACRO differs: checks function not show bit */
1125
1126 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field) \
1127 i->private_vport_attrs[count] = device_attr_vport_##field; \
1128 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1129 i->private_vport_attrs[count].store = NULL; \
1130 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1131 count++
1132
1133 #define SETUP_VPORT_ATTRIBUTE_WR(field) \
1134 i->private_vport_attrs[count] = device_attr_vport_##field; \
1135 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1136 if (i->f->field) \
1137 count++
1138 /* NOTE: Above MACRO differs: checks function */
1139
1140 #define SETUP_VPORT_ATTRIBUTE_RW(field) \
1141 i->private_vport_attrs[count] = device_attr_vport_##field; \
1142 if (!i->f->set_vport_##field) { \
1143 i->private_vport_attrs[count].attr.mode = S_IRUGO; \
1144 i->private_vport_attrs[count].store = NULL; \
1145 } \
1146 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1147 count++
1148 /* NOTE: Above MACRO differs: does not check show bit */
1149
1150 #define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field) \
1151 { \
1152 i->private_vport_attrs[count] = device_attr_vport_##field; \
1153 i->vport_attrs[count] = &i->private_vport_attrs[count]; \
1154 count++; \
1155 }
1156
1157
1158 /* The FC Transport Virtual Port Attributes: */
1159
1160 /* Fixed Virtual Port Attributes */
1161
1162 /* Dynamic Virtual Port Attributes */
1163
1164 /* Private Virtual Port Attributes */
1165
1166 fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
1167 fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
1168 fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1169 fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1170
1171 static ssize_t
1172 show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
1173 char *buf)
1174 {
1175 struct fc_vport *vport = transport_class_to_vport(dev);
1176
1177 if (vport->roles == FC_PORT_ROLE_UNKNOWN)
1178 return snprintf(buf, 20, "unknown\n");
1179 return get_fc_port_roles_names(vport->roles, buf);
1180 }
1181 static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1182
1183 fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
1184
1185 fc_private_vport_show_function(symbolic_name, "%s\n",
1186 FC_VPORT_SYMBOLIC_NAMELEN + 1, )
1187 fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1188 static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1189 show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
1190
1191 static ssize_t
1192 store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
1193 const char *buf, size_t count)
1194 {
1195 struct fc_vport *vport = transport_class_to_vport(dev);
1196 struct Scsi_Host *shost = vport_to_shost(vport);
1197
1198 fc_queue_work(shost, &vport->vport_delete_work);
1199 return count;
1200 }
1201 static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1202 NULL, store_fc_vport_delete);
1203
1204
1205 /*
1206 * Enable/Disable vport
1207 * Write "1" to disable, write "0" to enable
1208 */
1209 static ssize_t
1210 store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
1211 const char *buf,
1212 size_t count)
1213 {
1214 struct fc_vport *vport = transport_class_to_vport(dev);
1215 struct Scsi_Host *shost = vport_to_shost(vport);
1216 struct fc_internal *i = to_fc_internal(shost->transportt);
1217 int stat;
1218
1219 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
1220 return -EBUSY;
1221
1222 if (*buf == '0') {
1223 if (vport->vport_state != FC_VPORT_DISABLED)
1224 return -EALREADY;
1225 } else if (*buf == '1') {
1226 if (vport->vport_state == FC_VPORT_DISABLED)
1227 return -EALREADY;
1228 } else
1229 return -EINVAL;
1230
1231 stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
1232 return stat ? stat : count;
1233 }
1234 static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1235 NULL, store_fc_vport_disable);
1236
1237
1238 /*
1239 * Host Attribute Management
1240 */
1241
1242 #define fc_host_show_function(field, format_string, sz, cast) \
1243 static ssize_t \
1244 show_fc_host_##field (struct device *dev, \
1245 struct device_attribute *attr, char *buf) \
1246 { \
1247 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1248 struct fc_internal *i = to_fc_internal(shost->transportt); \
1249 if (i->f->get_host_##field) \
1250 i->f->get_host_##field(shost); \
1251 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1252 }
1253
1254 #define fc_host_store_function(field) \
1255 static ssize_t \
1256 store_fc_host_##field(struct device *dev, \
1257 struct device_attribute *attr, \
1258 const char *buf, size_t count) \
1259 { \
1260 int val; \
1261 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1262 struct fc_internal *i = to_fc_internal(shost->transportt); \
1263 char *cp; \
1264 \
1265 val = simple_strtoul(buf, &cp, 0); \
1266 if (*cp && (*cp != '\n')) \
1267 return -EINVAL; \
1268 i->f->set_host_##field(shost, val); \
1269 return count; \
1270 }
1271
1272 #define fc_host_store_str_function(field, slen) \
1273 static ssize_t \
1274 store_fc_host_##field(struct device *dev, \
1275 struct device_attribute *attr, \
1276 const char *buf, size_t count) \
1277 { \
1278 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1279 struct fc_internal *i = to_fc_internal(shost->transportt); \
1280 unsigned int cnt=count; \
1281 \
1282 /* count may include a LF at end of string */ \
1283 if (buf[cnt-1] == '\n') \
1284 cnt--; \
1285 if (cnt > ((slen) - 1)) \
1286 return -EINVAL; \
1287 memcpy(fc_host_##field(shost), buf, cnt); \
1288 i->f->set_host_##field(shost); \
1289 return count; \
1290 }
1291
1292 #define fc_host_rd_attr(field, format_string, sz) \
1293 fc_host_show_function(field, format_string, sz, ) \
1294 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1295 show_fc_host_##field, NULL)
1296
1297 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
1298 fc_host_show_function(field, format_string, sz, (cast)) \
1299 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1300 show_fc_host_##field, NULL)
1301
1302 #define fc_host_rw_attr(field, format_string, sz) \
1303 fc_host_show_function(field, format_string, sz, ) \
1304 fc_host_store_function(field) \
1305 static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
1306 show_fc_host_##field, \
1307 store_fc_host_##field)
1308
1309 #define fc_host_rd_enum_attr(title, maxlen) \
1310 static ssize_t \
1311 show_fc_host_##title (struct device *dev, \
1312 struct device_attribute *attr, char *buf) \
1313 { \
1314 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1315 struct fc_internal *i = to_fc_internal(shost->transportt); \
1316 const char *name; \
1317 if (i->f->get_host_##title) \
1318 i->f->get_host_##title(shost); \
1319 name = get_fc_##title##_name(fc_host_##title(shost)); \
1320 if (!name) \
1321 return -EINVAL; \
1322 return snprintf(buf, maxlen, "%s\n", name); \
1323 } \
1324 static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
1325
1326 #define SETUP_HOST_ATTRIBUTE_RD(field) \
1327 i->private_host_attrs[count] = device_attr_host_##field; \
1328 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1329 i->private_host_attrs[count].store = NULL; \
1330 i->host_attrs[count] = &i->private_host_attrs[count]; \
1331 if (i->f->show_host_##field) \
1332 count++
1333
1334 #define SETUP_HOST_ATTRIBUTE_RD_NS(field) \
1335 i->private_host_attrs[count] = device_attr_host_##field; \
1336 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1337 i->private_host_attrs[count].store = NULL; \
1338 i->host_attrs[count] = &i->private_host_attrs[count]; \
1339 count++
1340
1341 #define SETUP_HOST_ATTRIBUTE_RW(field) \
1342 i->private_host_attrs[count] = device_attr_host_##field; \
1343 if (!i->f->set_host_##field) { \
1344 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1345 i->private_host_attrs[count].store = NULL; \
1346 } \
1347 i->host_attrs[count] = &i->private_host_attrs[count]; \
1348 if (i->f->show_host_##field) \
1349 count++
1350
1351
1352 #define fc_private_host_show_function(field, format_string, sz, cast) \
1353 static ssize_t \
1354 show_fc_host_##field (struct device *dev, \
1355 struct device_attribute *attr, char *buf) \
1356 { \
1357 struct Scsi_Host *shost = transport_class_to_shost(dev); \
1358 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
1359 }
1360
1361 #define fc_private_host_rd_attr(field, format_string, sz) \
1362 fc_private_host_show_function(field, format_string, sz, ) \
1363 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1364 show_fc_host_##field, NULL)
1365
1366 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
1367 fc_private_host_show_function(field, format_string, sz, (cast)) \
1368 static FC_DEVICE_ATTR(host, field, S_IRUGO, \
1369 show_fc_host_##field, NULL)
1370
1371 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
1372 i->private_host_attrs[count] = device_attr_host_##field; \
1373 i->private_host_attrs[count].attr.mode = S_IRUGO; \
1374 i->private_host_attrs[count].store = NULL; \
1375 i->host_attrs[count] = &i->private_host_attrs[count]; \
1376 count++
1377
1378 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
1379 { \
1380 i->private_host_attrs[count] = device_attr_host_##field; \
1381 i->host_attrs[count] = &i->private_host_attrs[count]; \
1382 count++; \
1383 }
1384
1385
1386 /* Fixed Host Attributes */
1387
1388 static ssize_t
1389 show_fc_host_supported_classes (struct device *dev,
1390 struct device_attribute *attr, char *buf)
1391 {
1392 struct Scsi_Host *shost = transport_class_to_shost(dev);
1393
1394 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
1395 return snprintf(buf, 20, "unspecified\n");
1396
1397 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
1398 }
1399 static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
1400 show_fc_host_supported_classes, NULL);
1401
1402 static ssize_t
1403 show_fc_host_supported_fc4s (struct device *dev,
1404 struct device_attribute *attr, char *buf)
1405 {
1406 struct Scsi_Host *shost = transport_class_to_shost(dev);
1407 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
1408 }
1409 static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
1410 show_fc_host_supported_fc4s, NULL);
1411
1412 static ssize_t
1413 show_fc_host_supported_speeds (struct device *dev,
1414 struct device_attribute *attr, char *buf)
1415 {
1416 struct Scsi_Host *shost = transport_class_to_shost(dev);
1417
1418 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
1419 return snprintf(buf, 20, "unknown\n");
1420
1421 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
1422 }
1423 static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
1424 show_fc_host_supported_speeds, NULL);
1425
1426
1427 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
1428 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
1429 fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
1430 unsigned long long);
1431 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
1432 fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
1433 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
1434
1435
1436 /* Dynamic Host Attributes */
1437
1438 static ssize_t
1439 show_fc_host_active_fc4s (struct device *dev,
1440 struct device_attribute *attr, char *buf)
1441 {
1442 struct Scsi_Host *shost = transport_class_to_shost(dev);
1443 struct fc_internal *i = to_fc_internal(shost->transportt);
1444
1445 if (i->f->get_host_active_fc4s)
1446 i->f->get_host_active_fc4s(shost);
1447
1448 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
1449 }
1450 static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
1451 show_fc_host_active_fc4s, NULL);
1452
1453 static ssize_t
1454 show_fc_host_speed (struct device *dev,
1455 struct device_attribute *attr, char *buf)
1456 {
1457 struct Scsi_Host *shost = transport_class_to_shost(dev);
1458 struct fc_internal *i = to_fc_internal(shost->transportt);
1459
1460 if (i->f->get_host_speed)
1461 i->f->get_host_speed(shost);
1462
1463 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
1464 return snprintf(buf, 20, "unknown\n");
1465
1466 return get_fc_port_speed_names(fc_host_speed(shost), buf);
1467 }
1468 static FC_DEVICE_ATTR(host, speed, S_IRUGO,
1469 show_fc_host_speed, NULL);
1470
1471
1472 fc_host_rd_attr(port_id, "0x%06x\n", 20);
1473 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
1474 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
1475 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
1476 fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
1477
1478 fc_private_host_show_function(system_hostname, "%s\n",
1479 FC_SYMBOLIC_NAME_SIZE + 1, )
1480 fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
1481 static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
1482 show_fc_host_system_hostname, store_fc_host_system_hostname);
1483
1484
1485 /* Private Host Attributes */
1486
1487 static ssize_t
1488 show_fc_private_host_tgtid_bind_type(struct device *dev,
1489 struct device_attribute *attr, char *buf)
1490 {
1491 struct Scsi_Host *shost = transport_class_to_shost(dev);
1492 const char *name;
1493
1494 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
1495 if (!name)
1496 return -EINVAL;
1497 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
1498 }
1499
1500 #define get_list_head_entry(pos, head, member) \
1501 pos = list_entry((head)->next, typeof(*pos), member)
1502
1503 static ssize_t
1504 store_fc_private_host_tgtid_bind_type(struct device *dev,
1505 struct device_attribute *attr, const char *buf, size_t count)
1506 {
1507 struct Scsi_Host *shost = transport_class_to_shost(dev);
1508 struct fc_rport *rport;
1509 enum fc_tgtid_binding_type val;
1510 unsigned long flags;
1511
1512 if (get_fc_tgtid_bind_type_match(buf, &val))
1513 return -EINVAL;
1514
1515 /* if changing bind type, purge all unused consistent bindings */
1516 if (val != fc_host_tgtid_bind_type(shost)) {
1517 spin_lock_irqsave(shost->host_lock, flags);
1518 while (!list_empty(&fc_host_rport_bindings(shost))) {
1519 get_list_head_entry(rport,
1520 &fc_host_rport_bindings(shost), peers);
1521 list_del(&rport->peers);
1522 rport->port_state = FC_PORTSTATE_DELETED;
1523 fc_queue_work(shost, &rport->rport_delete_work);
1524 }
1525 spin_unlock_irqrestore(shost->host_lock, flags);
1526 }
1527
1528 fc_host_tgtid_bind_type(shost) = val;
1529 return count;
1530 }
1531
1532 static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
1533 show_fc_private_host_tgtid_bind_type,
1534 store_fc_private_host_tgtid_bind_type);
1535
1536 static ssize_t
1537 store_fc_private_host_issue_lip(struct device *dev,
1538 struct device_attribute *attr, const char *buf, size_t count)
1539 {
1540 struct Scsi_Host *shost = transport_class_to_shost(dev);
1541 struct fc_internal *i = to_fc_internal(shost->transportt);
1542 int ret;
1543
1544 /* ignore any data value written to the attribute */
1545 if (i->f->issue_fc_host_lip) {
1546 ret = i->f->issue_fc_host_lip(shost);
1547 return ret ? ret: count;
1548 }
1549
1550 return -ENOENT;
1551 }
1552
1553 static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
1554 store_fc_private_host_issue_lip);
1555
1556 fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
1557
1558
1559 /*
1560 * Host Statistics Management
1561 */
1562
1563 /* Show a given an attribute in the statistics group */
1564 static ssize_t
1565 fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
1566 {
1567 struct Scsi_Host *shost = transport_class_to_shost(dev);
1568 struct fc_internal *i = to_fc_internal(shost->transportt);
1569 struct fc_host_statistics *stats;
1570 ssize_t ret = -ENOENT;
1571
1572 if (offset > sizeof(struct fc_host_statistics) ||
1573 offset % sizeof(u64) != 0)
1574 WARN_ON(1);
1575
1576 if (i->f->get_fc_host_stats) {
1577 stats = (i->f->get_fc_host_stats)(shost);
1578 if (stats)
1579 ret = snprintf(buf, 20, "0x%llx\n",
1580 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
1581 }
1582 return ret;
1583 }
1584
1585
1586 /* generate a read-only statistics attribute */
1587 #define fc_host_statistic(name) \
1588 static ssize_t show_fcstat_##name(struct device *cd, \
1589 struct device_attribute *attr, \
1590 char *buf) \
1591 { \
1592 return fc_stat_show(cd, buf, \
1593 offsetof(struct fc_host_statistics, name)); \
1594 } \
1595 static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
1596
1597 fc_host_statistic(seconds_since_last_reset);
1598 fc_host_statistic(tx_frames);
1599 fc_host_statistic(tx_words);
1600 fc_host_statistic(rx_frames);
1601 fc_host_statistic(rx_words);
1602 fc_host_statistic(lip_count);
1603 fc_host_statistic(nos_count);
1604 fc_host_statistic(error_frames);
1605 fc_host_statistic(dumped_frames);
1606 fc_host_statistic(link_failure_count);
1607 fc_host_statistic(loss_of_sync_count);
1608 fc_host_statistic(loss_of_signal_count);
1609 fc_host_statistic(prim_seq_protocol_err_count);
1610 fc_host_statistic(invalid_tx_word_count);
1611 fc_host_statistic(invalid_crc_count);
1612 fc_host_statistic(fcp_input_requests);
1613 fc_host_statistic(fcp_output_requests);
1614 fc_host_statistic(fcp_control_requests);
1615 fc_host_statistic(fcp_input_megabytes);
1616 fc_host_statistic(fcp_output_megabytes);
1617
1618 static ssize_t
1619 fc_reset_statistics(struct device *dev, struct device_attribute *attr,
1620 const char *buf, size_t count)
1621 {
1622 struct Scsi_Host *shost = transport_class_to_shost(dev);
1623 struct fc_internal *i = to_fc_internal(shost->transportt);
1624
1625 /* ignore any data value written to the attribute */
1626 if (i->f->reset_fc_host_stats) {
1627 i->f->reset_fc_host_stats(shost);
1628 return count;
1629 }
1630
1631 return -ENOENT;
1632 }
1633 static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
1634 fc_reset_statistics);
1635
1636 static struct attribute *fc_statistics_attrs[] = {
1637 &device_attr_host_seconds_since_last_reset.attr,
1638 &device_attr_host_tx_frames.attr,
1639 &device_attr_host_tx_words.attr,
1640 &device_attr_host_rx_frames.attr,
1641 &device_attr_host_rx_words.attr,
1642 &device_attr_host_lip_count.attr,
1643 &device_attr_host_nos_count.attr,
1644 &device_attr_host_error_frames.attr,
1645 &device_attr_host_dumped_frames.attr,
1646 &device_attr_host_link_failure_count.attr,
1647 &device_attr_host_loss_of_sync_count.attr,
1648 &device_attr_host_loss_of_signal_count.attr,
1649 &device_attr_host_prim_seq_protocol_err_count.attr,
1650 &device_attr_host_invalid_tx_word_count.attr,
1651 &device_attr_host_invalid_crc_count.attr,
1652 &device_attr_host_fcp_input_requests.attr,
1653 &device_attr_host_fcp_output_requests.attr,
1654 &device_attr_host_fcp_control_requests.attr,
1655 &device_attr_host_fcp_input_megabytes.attr,
1656 &device_attr_host_fcp_output_megabytes.attr,
1657 &device_attr_host_reset_statistics.attr,
1658 NULL
1659 };
1660
1661 static struct attribute_group fc_statistics_group = {
1662 .name = "statistics",
1663 .attrs = fc_statistics_attrs,
1664 };
1665
1666
1667 /* Host Vport Attributes */
1668
1669 static int
1670 fc_parse_wwn(const char *ns, u64 *nm)
1671 {
1672 unsigned int i, j;
1673 u8 wwn[8];
1674
1675 memset(wwn, 0, sizeof(wwn));
1676
1677 /* Validate and store the new name */
1678 for (i=0, j=0; i < 16; i++) {
1679 if ((*ns >= 'a') && (*ns <= 'f'))
1680 j = ((j << 4) | ((*ns++ -'a') + 10));
1681 else if ((*ns >= 'A') && (*ns <= 'F'))
1682 j = ((j << 4) | ((*ns++ -'A') + 10));
1683 else if ((*ns >= '0') && (*ns <= '9'))
1684 j = ((j << 4) | (*ns++ -'0'));
1685 else
1686 return -EINVAL;
1687 if (i % 2) {
1688 wwn[i/2] = j & 0xff;
1689 j = 0;
1690 }
1691 }
1692
1693 *nm = wwn_to_u64(wwn);
1694
1695 return 0;
1696 }
1697
1698
1699 /*
1700 * "Short-cut" sysfs variable to create a new vport on a FC Host.
1701 * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
1702 * will default to a NPIV-based FCP_Initiator; The WWNs are specified
1703 * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
1704 */
1705 static ssize_t
1706 store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
1707 const char *buf, size_t count)
1708 {
1709 struct Scsi_Host *shost = transport_class_to_shost(dev);
1710 struct fc_vport_identifiers vid;
1711 struct fc_vport *vport;
1712 unsigned int cnt=count;
1713 int stat;
1714
1715 memset(&vid, 0, sizeof(vid));
1716
1717 /* count may include a LF at end of string */
1718 if (buf[cnt-1] == '\n')
1719 cnt--;
1720
1721 /* validate we have enough characters for WWPN */
1722 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1723 return -EINVAL;
1724
1725 stat = fc_parse_wwn(&buf[0], &vid.port_name);
1726 if (stat)
1727 return stat;
1728
1729 stat = fc_parse_wwn(&buf[17], &vid.node_name);
1730 if (stat)
1731 return stat;
1732
1733 vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
1734 vid.vport_type = FC_PORTTYPE_NPIV;
1735 /* vid.symbolic_name is already zero/NULL's */
1736 vid.disable = false; /* always enabled */
1737
1738 /* we only allow support on Channel 0 !!! */
1739 stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
1740 return stat ? stat : count;
1741 }
1742 static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
1743 store_fc_host_vport_create);
1744
1745
1746 /*
1747 * "Short-cut" sysfs variable to delete a vport on a FC Host.
1748 * Vport is identified by a string containing "<WWPN>:<WWNN>".
1749 * The WWNs are specified as hex characters, and may *not* contain
1750 * any prefixes (e.g. 0x, x, etc)
1751 */
1752 static ssize_t
1753 store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
1754 const char *buf, size_t count)
1755 {
1756 struct Scsi_Host *shost = transport_class_to_shost(dev);
1757 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
1758 struct fc_vport *vport;
1759 u64 wwpn, wwnn;
1760 unsigned long flags;
1761 unsigned int cnt=count;
1762 int stat, match;
1763
1764 /* count may include a LF at end of string */
1765 if (buf[cnt-1] == '\n')
1766 cnt--;
1767
1768 /* validate we have enough characters for WWPN */
1769 if ((cnt != (16+1+16)) || (buf[16] != ':'))
1770 return -EINVAL;
1771
1772 stat = fc_parse_wwn(&buf[0], &wwpn);
1773 if (stat)
1774 return stat;
1775
1776 stat = fc_parse_wwn(&buf[17], &wwnn);
1777 if (stat)
1778 return stat;
1779
1780 spin_lock_irqsave(shost->host_lock, flags);
1781 match = 0;
1782 /* we only allow support on Channel 0 !!! */
1783 list_for_each_entry(vport, &fc_host->vports, peers) {
1784 if ((vport->channel == 0) &&
1785 (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
1786 match = 1;
1787 break;
1788 }
1789 }
1790 spin_unlock_irqrestore(shost->host_lock, flags);
1791
1792 if (!match)
1793 return -ENODEV;
1794
1795 stat = fc_vport_terminate(vport);
1796 return stat ? stat : count;
1797 }
1798 static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
1799 store_fc_host_vport_delete);
1800
1801
1802 static int fc_host_match(struct attribute_container *cont,
1803 struct device *dev)
1804 {
1805 struct Scsi_Host *shost;
1806 struct fc_internal *i;
1807
1808 if (!scsi_is_host_device(dev))
1809 return 0;
1810
1811 shost = dev_to_shost(dev);
1812 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1813 != &fc_host_class.class)
1814 return 0;
1815
1816 i = to_fc_internal(shost->transportt);
1817
1818 return &i->t.host_attrs.ac == cont;
1819 }
1820
1821 static int fc_target_match(struct attribute_container *cont,
1822 struct device *dev)
1823 {
1824 struct Scsi_Host *shost;
1825 struct fc_internal *i;
1826
1827 if (!scsi_is_target_device(dev))
1828 return 0;
1829
1830 shost = dev_to_shost(dev->parent);
1831 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1832 != &fc_host_class.class)
1833 return 0;
1834
1835 i = to_fc_internal(shost->transportt);
1836
1837 return &i->t.target_attrs.ac == cont;
1838 }
1839
1840 static void fc_rport_dev_release(struct device *dev)
1841 {
1842 struct fc_rport *rport = dev_to_rport(dev);
1843 put_device(dev->parent);
1844 kfree(rport);
1845 }
1846
1847 int scsi_is_fc_rport(const struct device *dev)
1848 {
1849 return dev->release == fc_rport_dev_release;
1850 }
1851 EXPORT_SYMBOL(scsi_is_fc_rport);
1852
1853 static int fc_rport_match(struct attribute_container *cont,
1854 struct device *dev)
1855 {
1856 struct Scsi_Host *shost;
1857 struct fc_internal *i;
1858
1859 if (!scsi_is_fc_rport(dev))
1860 return 0;
1861
1862 shost = dev_to_shost(dev->parent);
1863 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1864 != &fc_host_class.class)
1865 return 0;
1866
1867 i = to_fc_internal(shost->transportt);
1868
1869 return &i->rport_attr_cont.ac == cont;
1870 }
1871
1872
1873 static void fc_vport_dev_release(struct device *dev)
1874 {
1875 struct fc_vport *vport = dev_to_vport(dev);
1876 put_device(dev->parent); /* release kobj parent */
1877 kfree(vport);
1878 }
1879
1880 int scsi_is_fc_vport(const struct device *dev)
1881 {
1882 return dev->release == fc_vport_dev_release;
1883 }
1884 EXPORT_SYMBOL(scsi_is_fc_vport);
1885
1886 static int fc_vport_match(struct attribute_container *cont,
1887 struct device *dev)
1888 {
1889 struct fc_vport *vport;
1890 struct Scsi_Host *shost;
1891 struct fc_internal *i;
1892
1893 if (!scsi_is_fc_vport(dev))
1894 return 0;
1895 vport = dev_to_vport(dev);
1896
1897 shost = vport_to_shost(vport);
1898 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1899 != &fc_host_class.class)
1900 return 0;
1901
1902 i = to_fc_internal(shost->transportt);
1903 return &i->vport_attr_cont.ac == cont;
1904 }
1905
1906
1907 /**
1908 * fc_timed_out - FC Transport I/O timeout intercept handler
1909 * @scmd: The SCSI command which timed out
1910 *
1911 * This routine protects against error handlers getting invoked while a
1912 * rport is in a blocked state, typically due to a temporarily loss of
1913 * connectivity. If the error handlers are allowed to proceed, requests
1914 * to abort i/o, reset the target, etc will likely fail as there is no way
1915 * to communicate with the device to perform the requested function. These
1916 * failures may result in the midlayer taking the device offline, requiring
1917 * manual intervention to restore operation.
1918 *
1919 * This routine, called whenever an i/o times out, validates the state of
1920 * the underlying rport. If the rport is blocked, it returns
1921 * EH_RESET_TIMER, which will continue to reschedule the timeout.
1922 * Eventually, either the device will return, or devloss_tmo will fire,
1923 * and when the timeout then fires, it will be handled normally.
1924 * If the rport is not blocked, normal error handling continues.
1925 *
1926 * Notes:
1927 * This routine assumes no locks are held on entry.
1928 */
1929 static enum blk_eh_timer_return
1930 fc_timed_out(struct scsi_cmnd *scmd)
1931 {
1932 struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
1933
1934 if (rport->port_state == FC_PORTSTATE_BLOCKED)
1935 return BLK_EH_RESET_TIMER;
1936
1937 return BLK_EH_NOT_HANDLED;
1938 }
1939
1940 /*
1941 * Called by fc_user_scan to locate an rport on the shost that
1942 * matches the channel and target id, and invoke scsi_scan_target()
1943 * on the rport.
1944 */
1945 static void
1946 fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, uint lun)
1947 {
1948 struct fc_rport *rport;
1949 unsigned long flags;
1950
1951 spin_lock_irqsave(shost->host_lock, flags);
1952
1953 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1954 if (rport->scsi_target_id == -1)
1955 continue;
1956
1957 if (rport->port_state != FC_PORTSTATE_ONLINE)
1958 continue;
1959
1960 if ((channel == rport->channel) &&
1961 (id == rport->scsi_target_id)) {
1962 spin_unlock_irqrestore(shost->host_lock, flags);
1963 scsi_scan_target(&rport->dev, channel, id, lun, 1);
1964 return;
1965 }
1966 }
1967
1968 spin_unlock_irqrestore(shost->host_lock, flags);
1969 }
1970
1971 /*
1972 * Called via sysfs scan routines. Necessary, as the FC transport
1973 * wants to place all target objects below the rport object. So this
1974 * routine must invoke the scsi_scan_target() routine with the rport
1975 * object as the parent.
1976 */
1977 static int
1978 fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, uint lun)
1979 {
1980 uint chlo, chhi;
1981 uint tgtlo, tgthi;
1982
1983 if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
1984 ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
1985 ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
1986 return -EINVAL;
1987
1988 if (channel == SCAN_WILD_CARD) {
1989 chlo = 0;
1990 chhi = shost->max_channel + 1;
1991 } else {
1992 chlo = channel;
1993 chhi = channel + 1;
1994 }
1995
1996 if (id == SCAN_WILD_CARD) {
1997 tgtlo = 0;
1998 tgthi = shost->max_id;
1999 } else {
2000 tgtlo = id;
2001 tgthi = id + 1;
2002 }
2003
2004 for ( ; chlo < chhi; chlo++)
2005 for ( ; tgtlo < tgthi; tgtlo++)
2006 fc_user_scan_tgt(shost, chlo, tgtlo, lun);
2007
2008 return 0;
2009 }
2010
2011 static int fc_tsk_mgmt_response(struct Scsi_Host *shost, u64 nexus, u64 tm_id,
2012 int result)
2013 {
2014 struct fc_internal *i = to_fc_internal(shost->transportt);
2015 return i->f->tsk_mgmt_response(shost, nexus, tm_id, result);
2016 }
2017
2018 static int fc_it_nexus_response(struct Scsi_Host *shost, u64 nexus, int result)
2019 {
2020 struct fc_internal *i = to_fc_internal(shost->transportt);
2021 return i->f->it_nexus_response(shost, nexus, result);
2022 }
2023
2024 struct scsi_transport_template *
2025 fc_attach_transport(struct fc_function_template *ft)
2026 {
2027 int count;
2028 struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
2029 GFP_KERNEL);
2030
2031 if (unlikely(!i))
2032 return NULL;
2033
2034 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
2035 i->t.target_attrs.ac.class = &fc_transport_class.class;
2036 i->t.target_attrs.ac.match = fc_target_match;
2037 i->t.target_size = sizeof(struct fc_starget_attrs);
2038 transport_container_register(&i->t.target_attrs);
2039
2040 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
2041 i->t.host_attrs.ac.class = &fc_host_class.class;
2042 i->t.host_attrs.ac.match = fc_host_match;
2043 i->t.host_size = sizeof(struct fc_host_attrs);
2044 if (ft->get_fc_host_stats)
2045 i->t.host_attrs.statistics = &fc_statistics_group;
2046 transport_container_register(&i->t.host_attrs);
2047
2048 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
2049 i->rport_attr_cont.ac.class = &fc_rport_class.class;
2050 i->rport_attr_cont.ac.match = fc_rport_match;
2051 transport_container_register(&i->rport_attr_cont);
2052
2053 i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
2054 i->vport_attr_cont.ac.class = &fc_vport_class.class;
2055 i->vport_attr_cont.ac.match = fc_vport_match;
2056 transport_container_register(&i->vport_attr_cont);
2057
2058 i->f = ft;
2059
2060 /* Transport uses the shost workq for scsi scanning */
2061 i->t.create_work_queue = 1;
2062
2063 i->t.eh_timed_out = fc_timed_out;
2064
2065 i->t.user_scan = fc_user_scan;
2066
2067 /* target-mode drivers' functions */
2068 i->t.tsk_mgmt_response = fc_tsk_mgmt_response;
2069 i->t.it_nexus_response = fc_it_nexus_response;
2070
2071 /*
2072 * Setup SCSI Target Attributes.
2073 */
2074 count = 0;
2075 SETUP_STARGET_ATTRIBUTE_RD(node_name);
2076 SETUP_STARGET_ATTRIBUTE_RD(port_name);
2077 SETUP_STARGET_ATTRIBUTE_RD(port_id);
2078
2079 BUG_ON(count > FC_STARGET_NUM_ATTRS);
2080
2081 i->starget_attrs[count] = NULL;
2082
2083
2084 /*
2085 * Setup SCSI Host Attributes.
2086 */
2087 count=0;
2088 SETUP_HOST_ATTRIBUTE_RD(node_name);
2089 SETUP_HOST_ATTRIBUTE_RD(port_name);
2090 SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
2091 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
2092 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
2093 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
2094 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
2095 if (ft->vport_create) {
2096 SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
2097 SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
2098 }
2099 SETUP_HOST_ATTRIBUTE_RD(serial_number);
2100
2101 SETUP_HOST_ATTRIBUTE_RD(port_id);
2102 SETUP_HOST_ATTRIBUTE_RD(port_type);
2103 SETUP_HOST_ATTRIBUTE_RD(port_state);
2104 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
2105 SETUP_HOST_ATTRIBUTE_RD(speed);
2106 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
2107 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
2108 SETUP_HOST_ATTRIBUTE_RW(system_hostname);
2109
2110 /* Transport-managed attributes */
2111 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
2112 if (ft->issue_fc_host_lip)
2113 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
2114 if (ft->vport_create)
2115 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
2116 if (ft->vport_delete)
2117 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
2118
2119 BUG_ON(count > FC_HOST_NUM_ATTRS);
2120
2121 i->host_attrs[count] = NULL;
2122
2123 /*
2124 * Setup Remote Port Attributes.
2125 */
2126 count=0;
2127 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
2128 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
2129 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
2130 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
2131 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
2132 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
2133 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
2134 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
2135 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
2136 SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
2137
2138 BUG_ON(count > FC_RPORT_NUM_ATTRS);
2139
2140 i->rport_attrs[count] = NULL;
2141
2142 /*
2143 * Setup Virtual Port Attributes.
2144 */
2145 count=0;
2146 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
2147 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
2148 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
2149 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
2150 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
2151 SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
2152 SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
2153 SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
2154 SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
2155
2156 BUG_ON(count > FC_VPORT_NUM_ATTRS);
2157
2158 i->vport_attrs[count] = NULL;
2159
2160 return &i->t;
2161 }
2162 EXPORT_SYMBOL(fc_attach_transport);
2163
2164 void fc_release_transport(struct scsi_transport_template *t)
2165 {
2166 struct fc_internal *i = to_fc_internal(t);
2167
2168 transport_container_unregister(&i->t.target_attrs);
2169 transport_container_unregister(&i->t.host_attrs);
2170 transport_container_unregister(&i->rport_attr_cont);
2171 transport_container_unregister(&i->vport_attr_cont);
2172
2173 kfree(i);
2174 }
2175 EXPORT_SYMBOL(fc_release_transport);
2176
2177 /**
2178 * fc_queue_work - Queue work to the fc_host workqueue.
2179 * @shost: Pointer to Scsi_Host bound to fc_host.
2180 * @work: Work to queue for execution.
2181 *
2182 * Return value:
2183 * 1 - work queued for execution
2184 * 0 - work is already queued
2185 * -EINVAL - work queue doesn't exist
2186 */
2187 static int
2188 fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
2189 {
2190 if (unlikely(!fc_host_work_q(shost))) {
2191 printk(KERN_ERR
2192 "ERROR: FC host '%s' attempted to queue work, "
2193 "when no workqueue created.\n", shost->hostt->name);
2194 dump_stack();
2195
2196 return -EINVAL;
2197 }
2198
2199 return queue_work(fc_host_work_q(shost), work);
2200 }
2201
2202 /**
2203 * fc_flush_work - Flush a fc_host's workqueue.
2204 * @shost: Pointer to Scsi_Host bound to fc_host.
2205 */
2206 static void
2207 fc_flush_work(struct Scsi_Host *shost)
2208 {
2209 if (!fc_host_work_q(shost)) {
2210 printk(KERN_ERR
2211 "ERROR: FC host '%s' attempted to flush work, "
2212 "when no workqueue created.\n", shost->hostt->name);
2213 dump_stack();
2214 return;
2215 }
2216
2217 flush_workqueue(fc_host_work_q(shost));
2218 }
2219
2220 /**
2221 * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
2222 * @shost: Pointer to Scsi_Host bound to fc_host.
2223 * @work: Work to queue for execution.
2224 * @delay: jiffies to delay the work queuing
2225 *
2226 * Return value:
2227 * 1 on success / 0 already queued / < 0 for error
2228 */
2229 static int
2230 fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
2231 unsigned long delay)
2232 {
2233 if (unlikely(!fc_host_devloss_work_q(shost))) {
2234 printk(KERN_ERR
2235 "ERROR: FC host '%s' attempted to queue work, "
2236 "when no workqueue created.\n", shost->hostt->name);
2237 dump_stack();
2238
2239 return -EINVAL;
2240 }
2241
2242 return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
2243 }
2244
2245 /**
2246 * fc_flush_devloss - Flush a fc_host's devloss workqueue.
2247 * @shost: Pointer to Scsi_Host bound to fc_host.
2248 */
2249 static void
2250 fc_flush_devloss(struct Scsi_Host *shost)
2251 {
2252 if (!fc_host_devloss_work_q(shost)) {
2253 printk(KERN_ERR
2254 "ERROR: FC host '%s' attempted to flush work, "
2255 "when no workqueue created.\n", shost->hostt->name);
2256 dump_stack();
2257 return;
2258 }
2259
2260 flush_workqueue(fc_host_devloss_work_q(shost));
2261 }
2262
2263
2264 /**
2265 * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
2266 * @shost: Which &Scsi_Host
2267 *
2268 * This routine is expected to be called immediately preceeding the
2269 * a driver's call to scsi_remove_host().
2270 *
2271 * WARNING: A driver utilizing the fc_transport, which fails to call
2272 * this routine prior to scsi_remove_host(), will leave dangling
2273 * objects in /sys/class/fc_remote_ports. Access to any of these
2274 * objects can result in a system crash !!!
2275 *
2276 * Notes:
2277 * This routine assumes no locks are held on entry.
2278 */
2279 void
2280 fc_remove_host(struct Scsi_Host *shost)
2281 {
2282 struct fc_vport *vport = NULL, *next_vport = NULL;
2283 struct fc_rport *rport = NULL, *next_rport = NULL;
2284 struct workqueue_struct *work_q;
2285 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2286 unsigned long flags;
2287
2288 spin_lock_irqsave(shost->host_lock, flags);
2289
2290 /* Remove any vports */
2291 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers)
2292 fc_queue_work(shost, &vport->vport_delete_work);
2293
2294 /* Remove any remote ports */
2295 list_for_each_entry_safe(rport, next_rport,
2296 &fc_host->rports, peers) {
2297 list_del(&rport->peers);
2298 rport->port_state = FC_PORTSTATE_DELETED;
2299 fc_queue_work(shost, &rport->rport_delete_work);
2300 }
2301
2302 list_for_each_entry_safe(rport, next_rport,
2303 &fc_host->rport_bindings, peers) {
2304 list_del(&rport->peers);
2305 rport->port_state = FC_PORTSTATE_DELETED;
2306 fc_queue_work(shost, &rport->rport_delete_work);
2307 }
2308
2309 spin_unlock_irqrestore(shost->host_lock, flags);
2310
2311 /* flush all scan work items */
2312 scsi_flush_work(shost);
2313
2314 /* flush all stgt delete, and rport delete work items, then kill it */
2315 if (fc_host->work_q) {
2316 work_q = fc_host->work_q;
2317 fc_host->work_q = NULL;
2318 destroy_workqueue(work_q);
2319 }
2320
2321 /* flush all devloss work items, then kill it */
2322 if (fc_host->devloss_work_q) {
2323 work_q = fc_host->devloss_work_q;
2324 fc_host->devloss_work_q = NULL;
2325 destroy_workqueue(work_q);
2326 }
2327 }
2328 EXPORT_SYMBOL(fc_remove_host);
2329
2330 static void fc_terminate_rport_io(struct fc_rport *rport)
2331 {
2332 struct Scsi_Host *shost = rport_to_shost(rport);
2333 struct fc_internal *i = to_fc_internal(shost->transportt);
2334
2335 /* Involve the LLDD if possible to terminate all io on the rport. */
2336 if (i->f->terminate_rport_io)
2337 i->f->terminate_rport_io(rport);
2338
2339 /*
2340 * must unblock to flush queued IO. The caller will have set
2341 * the port_state or flags, so that fc_remote_port_chkready will
2342 * fail IO.
2343 */
2344 scsi_target_unblock(&rport->dev);
2345 }
2346
2347 /**
2348 * fc_starget_delete - called to delete the scsi decendents of an rport
2349 * @work: remote port to be operated on.
2350 *
2351 * Deletes target and all sdevs.
2352 */
2353 static void
2354 fc_starget_delete(struct work_struct *work)
2355 {
2356 struct fc_rport *rport =
2357 container_of(work, struct fc_rport, stgt_delete_work);
2358
2359 fc_terminate_rport_io(rport);
2360 scsi_remove_target(&rport->dev);
2361 }
2362
2363
2364 /**
2365 * fc_rport_final_delete - finish rport termination and delete it.
2366 * @work: remote port to be deleted.
2367 */
2368 static void
2369 fc_rport_final_delete(struct work_struct *work)
2370 {
2371 struct fc_rport *rport =
2372 container_of(work, struct fc_rport, rport_delete_work);
2373 struct device *dev = &rport->dev;
2374 struct Scsi_Host *shost = rport_to_shost(rport);
2375 struct fc_internal *i = to_fc_internal(shost->transportt);
2376 unsigned long flags;
2377
2378 /*
2379 * if a scan is pending, flush the SCSI Host work_q so that
2380 * that we can reclaim the rport scan work element.
2381 */
2382 if (rport->flags & FC_RPORT_SCAN_PENDING)
2383 scsi_flush_work(shost);
2384
2385 fc_terminate_rport_io(rport);
2386 /*
2387 * Cancel any outstanding timers. These should really exist
2388 * only when rmmod'ing the LLDD and we're asking for
2389 * immediate termination of the rports
2390 */
2391 spin_lock_irqsave(shost->host_lock, flags);
2392 if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
2393 spin_unlock_irqrestore(shost->host_lock, flags);
2394 if (!cancel_delayed_work(&rport->fail_io_work))
2395 fc_flush_devloss(shost);
2396 if (!cancel_delayed_work(&rport->dev_loss_work))
2397 fc_flush_devloss(shost);
2398 spin_lock_irqsave(shost->host_lock, flags);
2399 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2400 }
2401 spin_unlock_irqrestore(shost->host_lock, flags);
2402
2403 /* Delete SCSI target and sdevs */
2404 if (rport->scsi_target_id != -1)
2405 fc_starget_delete(&rport->stgt_delete_work);
2406
2407 /*
2408 * Notify the driver that the rport is now dead. The LLDD will
2409 * also guarantee that any communication to the rport is terminated
2410 */
2411 if (i->f->dev_loss_tmo_callbk)
2412 i->f->dev_loss_tmo_callbk(rport);
2413
2414 transport_remove_device(dev);
2415 device_del(dev);
2416 transport_destroy_device(dev);
2417 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2418 put_device(dev); /* for self-reference */
2419 }
2420
2421
2422 /**
2423 * fc_rport_create - allocates and creates a remote FC port.
2424 * @shost: scsi host the remote port is connected to.
2425 * @channel: Channel on shost port connected to.
2426 * @ids: The world wide names, fc address, and FC4 port
2427 * roles for the remote port.
2428 *
2429 * Allocates and creates the remoter port structure, including the
2430 * class and sysfs creation.
2431 *
2432 * Notes:
2433 * This routine assumes no locks are held on entry.
2434 */
2435 static struct fc_rport *
2436 fc_rport_create(struct Scsi_Host *shost, int channel,
2437 struct fc_rport_identifiers *ids)
2438 {
2439 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2440 struct fc_internal *fci = to_fc_internal(shost->transportt);
2441 struct fc_rport *rport;
2442 struct device *dev;
2443 unsigned long flags;
2444 int error;
2445 size_t size;
2446
2447 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
2448 rport = kzalloc(size, GFP_KERNEL);
2449 if (unlikely(!rport)) {
2450 printk(KERN_ERR "%s: allocation failure\n", __func__);
2451 return NULL;
2452 }
2453
2454 rport->maxframe_size = -1;
2455 rport->supported_classes = FC_COS_UNSPECIFIED;
2456 rport->dev_loss_tmo = fc_dev_loss_tmo;
2457 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
2458 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
2459 rport->port_id = ids->port_id;
2460 rport->roles = ids->roles;
2461 rport->port_state = FC_PORTSTATE_ONLINE;
2462 if (fci->f->dd_fcrport_size)
2463 rport->dd_data = &rport[1];
2464 rport->channel = channel;
2465 rport->fast_io_fail_tmo = -1;
2466
2467 INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
2468 INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
2469 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
2470 INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
2471 INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
2472
2473 spin_lock_irqsave(shost->host_lock, flags);
2474
2475 rport->number = fc_host->next_rport_number++;
2476 if (rport->roles & FC_PORT_ROLE_FCP_TARGET)
2477 rport->scsi_target_id = fc_host->next_target_id++;
2478 else
2479 rport->scsi_target_id = -1;
2480 list_add_tail(&rport->peers, &fc_host->rports);
2481 get_device(&shost->shost_gendev); /* for fc_host->rport list */
2482
2483 spin_unlock_irqrestore(shost->host_lock, flags);
2484
2485 dev = &rport->dev;
2486 device_initialize(dev); /* takes self reference */
2487 dev->parent = get_device(&shost->shost_gendev); /* parent reference */
2488 dev->release = fc_rport_dev_release;
2489 sprintf(dev->bus_id, "rport-%d:%d-%d",
2490 shost->host_no, channel, rport->number);
2491 transport_setup_device(dev);
2492
2493 error = device_add(dev);
2494 if (error) {
2495 printk(KERN_ERR "FC Remote Port device_add failed\n");
2496 goto delete_rport;
2497 }
2498 transport_add_device(dev);
2499 transport_configure_device(dev);
2500
2501 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2502 /* initiate a scan of the target */
2503 rport->flags |= FC_RPORT_SCAN_PENDING;
2504 scsi_queue_work(shost, &rport->scan_work);
2505 }
2506
2507 return rport;
2508
2509 delete_rport:
2510 transport_destroy_device(dev);
2511 spin_lock_irqsave(shost->host_lock, flags);
2512 list_del(&rport->peers);
2513 put_device(&shost->shost_gendev); /* for fc_host->rport list */
2514 spin_unlock_irqrestore(shost->host_lock, flags);
2515 put_device(dev->parent);
2516 kfree(rport);
2517 return NULL;
2518 }
2519
2520 /**
2521 * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
2522 * @shost: scsi host the remote port is connected to.
2523 * @channel: Channel on shost port connected to.
2524 * @ids: The world wide names, fc address, and FC4 port
2525 * roles for the remote port.
2526 *
2527 * The LLDD calls this routine to notify the transport of the existence
2528 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
2529 * of the port, it's FC address (port_id), and the FC4 roles that are
2530 * active for the port.
2531 *
2532 * For ports that are FCP targets (aka scsi targets), the FC transport
2533 * maintains consistent target id bindings on behalf of the LLDD.
2534 * A consistent target id binding is an assignment of a target id to
2535 * a remote port identifier, which persists while the scsi host is
2536 * attached. The remote port can disappear, then later reappear, and
2537 * it's target id assignment remains the same. This allows for shifts
2538 * in FC addressing (if binding by wwpn or wwnn) with no apparent
2539 * changes to the scsi subsystem which is based on scsi host number and
2540 * target id values. Bindings are only valid during the attachment of
2541 * the scsi host. If the host detaches, then later re-attaches, target
2542 * id bindings may change.
2543 *
2544 * This routine is responsible for returning a remote port structure.
2545 * The routine will search the list of remote ports it maintains
2546 * internally on behalf of consistent target id mappings. If found, the
2547 * remote port structure will be reused. Otherwise, a new remote port
2548 * structure will be allocated.
2549 *
2550 * Whenever a remote port is allocated, a new fc_remote_port class
2551 * device is created.
2552 *
2553 * Should not be called from interrupt context.
2554 *
2555 * Notes:
2556 * This routine assumes no locks are held on entry.
2557 */
2558 struct fc_rport *
2559 fc_remote_port_add(struct Scsi_Host *shost, int channel,
2560 struct fc_rport_identifiers *ids)
2561 {
2562 struct fc_internal *fci = to_fc_internal(shost->transportt);
2563 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2564 struct fc_rport *rport;
2565 unsigned long flags;
2566 int match = 0;
2567
2568 /* ensure any stgt delete functions are done */
2569 fc_flush_work(shost);
2570
2571 /*
2572 * Search the list of "active" rports, for an rport that has been
2573 * deleted, but we've held off the real delete while the target
2574 * is in a "blocked" state.
2575 */
2576 spin_lock_irqsave(shost->host_lock, flags);
2577
2578 list_for_each_entry(rport, &fc_host->rports, peers) {
2579
2580 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
2581 (rport->channel == channel)) {
2582
2583 switch (fc_host->tgtid_bind_type) {
2584 case FC_TGTID_BIND_BY_WWPN:
2585 case FC_TGTID_BIND_NONE:
2586 if (rport->port_name == ids->port_name)
2587 match = 1;
2588 break;
2589 case FC_TGTID_BIND_BY_WWNN:
2590 if (rport->node_name == ids->node_name)
2591 match = 1;
2592 break;
2593 case FC_TGTID_BIND_BY_ID:
2594 if (rport->port_id == ids->port_id)
2595 match = 1;
2596 break;
2597 }
2598
2599 if (match) {
2600
2601 memcpy(&rport->node_name, &ids->node_name,
2602 sizeof(rport->node_name));
2603 memcpy(&rport->port_name, &ids->port_name,
2604 sizeof(rport->port_name));
2605 rport->port_id = ids->port_id;
2606
2607 rport->port_state = FC_PORTSTATE_ONLINE;
2608 rport->roles = ids->roles;
2609
2610 spin_unlock_irqrestore(shost->host_lock, flags);
2611
2612 if (fci->f->dd_fcrport_size)
2613 memset(rport->dd_data, 0,
2614 fci->f->dd_fcrport_size);
2615
2616 /*
2617 * If we were not a target, cancel the
2618 * io terminate and rport timers, and
2619 * we're done.
2620 *
2621 * If we were a target, but our new role
2622 * doesn't indicate a target, leave the
2623 * timers running expecting the role to
2624 * change as the target fully logs in. If
2625 * it doesn't, the target will be torn down.
2626 *
2627 * If we were a target, and our role shows
2628 * we're still a target, cancel the timers
2629 * and kick off a scan.
2630 */
2631
2632 /* was a target, not in roles */
2633 if ((rport->scsi_target_id != -1) &&
2634 (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
2635 return rport;
2636
2637 /*
2638 * Stop the fail io and dev_loss timers.
2639 * If they flush, the port_state will
2640 * be checked and will NOOP the function.
2641 */
2642 if (!cancel_delayed_work(&rport->fail_io_work))
2643 fc_flush_devloss(shost);
2644 if (!cancel_delayed_work(&rport->dev_loss_work))
2645 fc_flush_devloss(shost);
2646
2647 spin_lock_irqsave(shost->host_lock, flags);
2648
2649 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2650 FC_RPORT_DEVLOSS_PENDING);
2651
2652 /* if target, initiate a scan */
2653 if (rport->scsi_target_id != -1) {
2654 rport->flags |= FC_RPORT_SCAN_PENDING;
2655 scsi_queue_work(shost,
2656 &rport->scan_work);
2657 spin_unlock_irqrestore(shost->host_lock,
2658 flags);
2659 scsi_target_unblock(&rport->dev);
2660 } else
2661 spin_unlock_irqrestore(shost->host_lock,
2662 flags);
2663
2664 return rport;
2665 }
2666 }
2667 }
2668
2669 /*
2670 * Search the bindings array
2671 * Note: if never a FCP target, you won't be on this list
2672 */
2673 if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
2674
2675 /* search for a matching consistent binding */
2676
2677 list_for_each_entry(rport, &fc_host->rport_bindings,
2678 peers) {
2679 if (rport->channel != channel)
2680 continue;
2681
2682 switch (fc_host->tgtid_bind_type) {
2683 case FC_TGTID_BIND_BY_WWPN:
2684 if (rport->port_name == ids->port_name)
2685 match = 1;
2686 break;
2687 case FC_TGTID_BIND_BY_WWNN:
2688 if (rport->node_name == ids->node_name)
2689 match = 1;
2690 break;
2691 case FC_TGTID_BIND_BY_ID:
2692 if (rport->port_id == ids->port_id)
2693 match = 1;
2694 break;
2695 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
2696 break;
2697 }
2698
2699 if (match) {
2700 list_move_tail(&rport->peers, &fc_host->rports);
2701 break;
2702 }
2703 }
2704
2705 if (match) {
2706 memcpy(&rport->node_name, &ids->node_name,
2707 sizeof(rport->node_name));
2708 memcpy(&rport->port_name, &ids->port_name,
2709 sizeof(rport->port_name));
2710 rport->port_id = ids->port_id;
2711 rport->roles = ids->roles;
2712 rport->port_state = FC_PORTSTATE_ONLINE;
2713 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
2714
2715 if (fci->f->dd_fcrport_size)
2716 memset(rport->dd_data, 0,
2717 fci->f->dd_fcrport_size);
2718
2719 if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
2720 /* initiate a scan of the target */
2721 rport->flags |= FC_RPORT_SCAN_PENDING;
2722 scsi_queue_work(shost, &rport->scan_work);
2723 spin_unlock_irqrestore(shost->host_lock, flags);
2724 scsi_target_unblock(&rport->dev);
2725 } else
2726 spin_unlock_irqrestore(shost->host_lock, flags);
2727
2728 return rport;
2729 }
2730 }
2731
2732 spin_unlock_irqrestore(shost->host_lock, flags);
2733
2734 /* No consistent binding found - create new remote port entry */
2735 rport = fc_rport_create(shost, channel, ids);
2736
2737 return rport;
2738 }
2739 EXPORT_SYMBOL(fc_remote_port_add);
2740
2741
2742 /**
2743 * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
2744 * @rport: The remote port that no longer exists
2745 *
2746 * The LLDD calls this routine to notify the transport that a remote
2747 * port is no longer part of the topology. Note: Although a port
2748 * may no longer be part of the topology, it may persist in the remote
2749 * ports displayed by the fc_host. We do this under 2 conditions:
2750 * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
2751 * This allows the port to temporarily disappear, then reappear without
2752 * disrupting the SCSI device tree attached to it. During the "blocked"
2753 * period the port will still exist.
2754 * 2) If the port was a scsi target and disappears for longer than we
2755 * expect, we'll delete the port and the tear down the SCSI device tree
2756 * attached to it. However, we want to semi-persist the target id assigned
2757 * to that port if it eventually does exist. The port structure will
2758 * remain (although with minimal information) so that the target id
2759 * bindings remails.
2760 *
2761 * If the remote port is not an FCP Target, it will be fully torn down
2762 * and deallocated, including the fc_remote_port class device.
2763 *
2764 * If the remote port is an FCP Target, the port will be placed in a
2765 * temporary blocked state. From the LLDD's perspective, the rport no
2766 * longer exists. From the SCSI midlayer's perspective, the SCSI target
2767 * exists, but all sdevs on it are blocked from further I/O. The following
2768 * is then expected.
2769 *
2770 * If the remote port does not return (signaled by a LLDD call to
2771 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
2772 * scsi target is removed - killing all outstanding i/o and removing the
2773 * scsi devices attached ot it. The port structure will be marked Not
2774 * Present and be partially cleared, leaving only enough information to
2775 * recognize the remote port relative to the scsi target id binding if
2776 * it later appears. The port will remain as long as there is a valid
2777 * binding (e.g. until the user changes the binding type or unloads the
2778 * scsi host with the binding).
2779 *
2780 * If the remote port returns within the dev_loss_tmo value (and matches
2781 * according to the target id binding type), the port structure will be
2782 * reused. If it is no longer a SCSI target, the target will be torn
2783 * down. If it continues to be a SCSI target, then the target will be
2784 * unblocked (allowing i/o to be resumed), and a scan will be activated
2785 * to ensure that all luns are detected.
2786 *
2787 * Called from normal process context only - cannot be called from interrupt.
2788 *
2789 * Notes:
2790 * This routine assumes no locks are held on entry.
2791 */
2792 void
2793 fc_remote_port_delete(struct fc_rport *rport)
2794 {
2795 struct Scsi_Host *shost = rport_to_shost(rport);
2796 int timeout = rport->dev_loss_tmo;
2797 unsigned long flags;
2798
2799 /*
2800 * No need to flush the fc_host work_q's, as all adds are synchronous.
2801 *
2802 * We do need to reclaim the rport scan work element, so eventually
2803 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
2804 * there's still a scan pending.
2805 */
2806
2807 spin_lock_irqsave(shost->host_lock, flags);
2808
2809 if (rport->port_state != FC_PORTSTATE_ONLINE) {
2810 spin_unlock_irqrestore(shost->host_lock, flags);
2811 return;
2812 }
2813
2814 /*
2815 * In the past, we if this was not an FCP-Target, we would
2816 * unconditionally just jump to deleting the rport.
2817 * However, rports can be used as node containers by the LLDD,
2818 * and its not appropriate to just terminate the rport at the
2819 * first sign of a loss in connectivity. The LLDD may want to
2820 * send ELS traffic to re-validate the login. If the rport is
2821 * immediately deleted, it makes it inappropriate for a node
2822 * container.
2823 * So... we now unconditionally wait dev_loss_tmo before
2824 * destroying an rport.
2825 */
2826
2827 rport->port_state = FC_PORTSTATE_BLOCKED;
2828
2829 rport->flags |= FC_RPORT_DEVLOSS_PENDING;
2830
2831 spin_unlock_irqrestore(shost->host_lock, flags);
2832
2833 if (rport->roles & FC_PORT_ROLE_FCP_INITIATOR &&
2834 shost->active_mode & MODE_TARGET)
2835 fc_tgt_it_nexus_destroy(shost, (unsigned long)rport);
2836
2837 scsi_target_block(&rport->dev);
2838
2839 /* see if we need to kill io faster than waiting for device loss */
2840 if ((rport->fast_io_fail_tmo != -1) &&
2841 (rport->fast_io_fail_tmo < timeout))
2842 fc_queue_devloss_work(shost, &rport->fail_io_work,
2843 rport->fast_io_fail_tmo * HZ);
2844
2845 /* cap the length the devices can be blocked until they are deleted */
2846 fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
2847 }
2848 EXPORT_SYMBOL(fc_remote_port_delete);
2849
2850 /**
2851 * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
2852 * @rport: The remote port that changed.
2853 * @roles: New roles for this port.
2854 *
2855 * Description: The LLDD calls this routine to notify the transport that the
2856 * roles on a remote port may have changed. The largest effect of this is
2857 * if a port now becomes a FCP Target, it must be allocated a
2858 * scsi target id. If the port is no longer a FCP target, any
2859 * scsi target id value assigned to it will persist in case the
2860 * role changes back to include FCP Target. No changes in the scsi
2861 * midlayer will be invoked if the role changes (in the expectation
2862 * that the role will be resumed. If it doesn't normal error processing
2863 * will take place).
2864 *
2865 * Should not be called from interrupt context.
2866 *
2867 * Notes:
2868 * This routine assumes no locks are held on entry.
2869 */
2870 void
2871 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
2872 {
2873 struct Scsi_Host *shost = rport_to_shost(rport);
2874 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2875 unsigned long flags;
2876 int create = 0;
2877 int ret;
2878
2879 spin_lock_irqsave(shost->host_lock, flags);
2880 if (roles & FC_PORT_ROLE_FCP_TARGET) {
2881 if (rport->scsi_target_id == -1) {
2882 rport->scsi_target_id = fc_host->next_target_id++;
2883 create = 1;
2884 } else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
2885 create = 1;
2886 } else if (shost->active_mode & MODE_TARGET) {
2887 ret = fc_tgt_it_nexus_create(shost, (unsigned long)rport,
2888 (char *)&rport->node_name);
2889 if (ret)
2890 printk(KERN_ERR "FC Remore Port tgt nexus failed %d\n",
2891 ret);
2892 }
2893
2894 rport->roles = roles;
2895
2896 spin_unlock_irqrestore(shost->host_lock, flags);
2897
2898 if (create) {
2899 /*
2900 * There may have been a delete timer running on the
2901 * port. Ensure that it is cancelled as we now know
2902 * the port is an FCP Target.
2903 * Note: we know the rport is exists and in an online
2904 * state as the LLDD would not have had an rport
2905 * reference to pass us.
2906 *
2907 * Take no action on the del_timer failure as the state
2908 * machine state change will validate the
2909 * transaction.
2910 */
2911 if (!cancel_delayed_work(&rport->fail_io_work))
2912 fc_flush_devloss(shost);
2913 if (!cancel_delayed_work(&rport->dev_loss_work))
2914 fc_flush_devloss(shost);
2915
2916 spin_lock_irqsave(shost->host_lock, flags);
2917 rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
2918 FC_RPORT_DEVLOSS_PENDING);
2919 spin_unlock_irqrestore(shost->host_lock, flags);
2920
2921 /* ensure any stgt delete functions are done */
2922 fc_flush_work(shost);
2923
2924 /* initiate a scan of the target */
2925 spin_lock_irqsave(shost->host_lock, flags);
2926 rport->flags |= FC_RPORT_SCAN_PENDING;
2927 scsi_queue_work(shost, &rport->scan_work);
2928 spin_unlock_irqrestore(shost->host_lock, flags);
2929 scsi_target_unblock(&rport->dev);
2930 }
2931 }
2932 EXPORT_SYMBOL(fc_remote_port_rolechg);
2933
2934 /**
2935 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
2936 * @work: rport target that failed to reappear in the allotted time.
2937 *
2938 * Description: An attempt to delete a remote port blocks, and if it fails
2939 * to return in the allotted time this gets called.
2940 */
2941 static void
2942 fc_timeout_deleted_rport(struct work_struct *work)
2943 {
2944 struct fc_rport *rport =
2945 container_of(work, struct fc_rport, dev_loss_work.work);
2946 struct Scsi_Host *shost = rport_to_shost(rport);
2947 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
2948 unsigned long flags;
2949
2950 spin_lock_irqsave(shost->host_lock, flags);
2951
2952 rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
2953
2954 /*
2955 * If the port is ONLINE, then it came back. If it was a SCSI
2956 * target, validate it still is. If not, tear down the
2957 * scsi_target on it.
2958 */
2959 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
2960 (rport->scsi_target_id != -1) &&
2961 !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
2962 dev_printk(KERN_ERR, &rport->dev,
2963 "blocked FC remote port time out: no longer"
2964 " a FCP target, removing starget\n");
2965 spin_unlock_irqrestore(shost->host_lock, flags);
2966 scsi_target_unblock(&rport->dev);
2967 fc_queue_work(shost, &rport->stgt_delete_work);
2968 return;
2969 }
2970
2971 /* NOOP state - we're flushing workq's */
2972 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
2973 spin_unlock_irqrestore(shost->host_lock, flags);
2974 dev_printk(KERN_ERR, &rport->dev,
2975 "blocked FC remote port time out: leaving"
2976 " rport%s alone\n",
2977 (rport->scsi_target_id != -1) ? " and starget" : "");
2978 return;
2979 }
2980
2981 if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
2982 (rport->scsi_target_id == -1)) {
2983 list_del(&rport->peers);
2984 rport->port_state = FC_PORTSTATE_DELETED;
2985 dev_printk(KERN_ERR, &rport->dev,
2986 "blocked FC remote port time out: removing"
2987 " rport%s\n",
2988 (rport->scsi_target_id != -1) ? " and starget" : "");
2989 fc_queue_work(shost, &rport->rport_delete_work);
2990 spin_unlock_irqrestore(shost->host_lock, flags);
2991 return;
2992 }
2993
2994 dev_printk(KERN_ERR, &rport->dev,
2995 "blocked FC remote port time out: removing target and "
2996 "saving binding\n");
2997
2998 list_move_tail(&rport->peers, &fc_host->rport_bindings);
2999
3000 /*
3001 * Note: We do not remove or clear the hostdata area. This allows
3002 * host-specific target data to persist along with the
3003 * scsi_target_id. It's up to the host to manage it's hostdata area.
3004 */
3005
3006 /*
3007 * Reinitialize port attributes that may change if the port comes back.
3008 */
3009 rport->maxframe_size = -1;
3010 rport->supported_classes = FC_COS_UNSPECIFIED;
3011 rport->roles = FC_PORT_ROLE_UNKNOWN;
3012 rport->port_state = FC_PORTSTATE_NOTPRESENT;
3013 rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
3014
3015 /* remove the identifiers that aren't used in the consisting binding */
3016 switch (fc_host->tgtid_bind_type) {
3017 case FC_TGTID_BIND_BY_WWPN:
3018 rport->node_name = -1;
3019 rport->port_id = -1;
3020 break;
3021 case FC_TGTID_BIND_BY_WWNN:
3022 rport->port_name = -1;
3023 rport->port_id = -1;
3024 break;
3025 case FC_TGTID_BIND_BY_ID:
3026 rport->node_name = -1;
3027 rport->port_name = -1;
3028 break;
3029 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
3030 break;
3031 }
3032
3033 /*
3034 * As this only occurs if the remote port (scsi target)
3035 * went away and didn't come back - we'll remove
3036 * all attached scsi devices.
3037 */
3038 spin_unlock_irqrestore(shost->host_lock, flags);
3039
3040 scsi_target_unblock(&rport->dev);
3041 fc_queue_work(shost, &rport->stgt_delete_work);
3042 }
3043
3044 /**
3045 * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
3046 * @work: rport to terminate io on.
3047 *
3048 * Notes: Only requests the failure of the io, not that all are flushed
3049 * prior to returning.
3050 */
3051 static void
3052 fc_timeout_fail_rport_io(struct work_struct *work)
3053 {
3054 struct fc_rport *rport =
3055 container_of(work, struct fc_rport, fail_io_work.work);
3056
3057 if (rport->port_state != FC_PORTSTATE_BLOCKED)
3058 return;
3059
3060 rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
3061 fc_terminate_rport_io(rport);
3062 }
3063
3064 /**
3065 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
3066 * @work: remote port to be scanned.
3067 */
3068 static void
3069 fc_scsi_scan_rport(struct work_struct *work)
3070 {
3071 struct fc_rport *rport =
3072 container_of(work, struct fc_rport, scan_work);
3073 struct Scsi_Host *shost = rport_to_shost(rport);
3074 struct fc_internal *i = to_fc_internal(shost->transportt);
3075 unsigned long flags;
3076
3077 if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
3078 (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
3079 !(i->f->disable_target_scan)) {
3080 scsi_scan_target(&rport->dev, rport->channel,
3081 rport->scsi_target_id, SCAN_WILD_CARD, 1);
3082 }
3083
3084 spin_lock_irqsave(shost->host_lock, flags);
3085 rport->flags &= ~FC_RPORT_SCAN_PENDING;
3086 spin_unlock_irqrestore(shost->host_lock, flags);
3087 }
3088
3089
3090 /**
3091 * fc_vport_setup - allocates and creates a FC virtual port.
3092 * @shost: scsi host the virtual port is connected to.
3093 * @channel: Channel on shost port connected to.
3094 * @pdev: parent device for vport
3095 * @ids: The world wide names, FC4 port roles, etc for
3096 * the virtual port.
3097 * @ret_vport: The pointer to the created vport.
3098 *
3099 * Allocates and creates the vport structure, calls the parent host
3100 * to instantiate the vport, the completes w/ class and sysfs creation.
3101 *
3102 * Notes:
3103 * This routine assumes no locks are held on entry.
3104 */
3105 static int
3106 fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
3107 struct fc_vport_identifiers *ids, struct fc_vport **ret_vport)
3108 {
3109 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3110 struct fc_internal *fci = to_fc_internal(shost->transportt);
3111 struct fc_vport *vport;
3112 struct device *dev;
3113 unsigned long flags;
3114 size_t size;
3115 int error;
3116
3117 *ret_vport = NULL;
3118
3119 if ( ! fci->f->vport_create)
3120 return -ENOENT;
3121
3122 size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
3123 vport = kzalloc(size, GFP_KERNEL);
3124 if (unlikely(!vport)) {
3125 printk(KERN_ERR "%s: allocation failure\n", __func__);
3126 return -ENOMEM;
3127 }
3128
3129 vport->vport_state = FC_VPORT_UNKNOWN;
3130 vport->vport_last_state = FC_VPORT_UNKNOWN;
3131 vport->node_name = ids->node_name;
3132 vport->port_name = ids->port_name;
3133 vport->roles = ids->roles;
3134 vport->vport_type = ids->vport_type;
3135 if (fci->f->dd_fcvport_size)
3136 vport->dd_data = &vport[1];
3137 vport->shost = shost;
3138 vport->channel = channel;
3139 vport->flags = FC_VPORT_CREATING;
3140 INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
3141
3142 spin_lock_irqsave(shost->host_lock, flags);
3143
3144 if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
3145 spin_unlock_irqrestore(shost->host_lock, flags);
3146 kfree(vport);
3147 return -ENOSPC;
3148 }
3149 fc_host->npiv_vports_inuse++;
3150 vport->number = fc_host->next_vport_number++;
3151 list_add_tail(&vport->peers, &fc_host->vports);
3152 get_device(&shost->shost_gendev); /* for fc_host->vport list */
3153
3154 spin_unlock_irqrestore(shost->host_lock, flags);
3155
3156 dev = &vport->dev;
3157 device_initialize(dev); /* takes self reference */
3158 dev->parent = get_device(pdev); /* takes parent reference */
3159 dev->release = fc_vport_dev_release;
3160 sprintf(dev->bus_id, "vport-%d:%d-%d",
3161 shost->host_no, channel, vport->number);
3162 transport_setup_device(dev);
3163
3164 error = device_add(dev);
3165 if (error) {
3166 printk(KERN_ERR "FC Virtual Port device_add failed\n");
3167 goto delete_vport;
3168 }
3169 transport_add_device(dev);
3170 transport_configure_device(dev);
3171
3172 error = fci->f->vport_create(vport, ids->disable);
3173 if (error) {
3174 printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
3175 goto delete_vport_all;
3176 }
3177
3178 /*
3179 * if the parent isn't the physical adapter's Scsi_Host, ensure
3180 * the Scsi_Host at least contains ia symlink to the vport.
3181 */
3182 if (pdev != &shost->shost_gendev) {
3183 error = sysfs_create_link(&shost->shost_gendev.kobj,
3184 &dev->kobj, dev->bus_id);
3185 if (error)
3186 printk(KERN_ERR
3187 "%s: Cannot create vport symlinks for "
3188 "%s, err=%d\n",
3189 __func__, dev->bus_id, error);
3190 }
3191 spin_lock_irqsave(shost->host_lock, flags);
3192 vport->flags &= ~FC_VPORT_CREATING;
3193 spin_unlock_irqrestore(shost->host_lock, flags);
3194
3195 dev_printk(KERN_NOTICE, pdev,
3196 "%s created via shost%d channel %d\n", dev->bus_id,
3197 shost->host_no, channel);
3198
3199 *ret_vport = vport;
3200
3201 return 0;
3202
3203 delete_vport_all:
3204 transport_remove_device(dev);
3205 device_del(dev);
3206 delete_vport:
3207 transport_destroy_device(dev);
3208 spin_lock_irqsave(shost->host_lock, flags);
3209 list_del(&vport->peers);
3210 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3211 fc_host->npiv_vports_inuse--;
3212 spin_unlock_irqrestore(shost->host_lock, flags);
3213 put_device(dev->parent);
3214 kfree(vport);
3215
3216 return error;
3217 }
3218
3219 /**
3220 * fc_vport_create - Admin App or LLDD requests creation of a vport
3221 * @shost: scsi host the virtual port is connected to.
3222 * @channel: channel on shost port connected to.
3223 * @ids: The world wide names, FC4 port roles, etc for
3224 * the virtual port.
3225 *
3226 * Notes:
3227 * This routine assumes no locks are held on entry.
3228 */
3229 struct fc_vport *
3230 fc_vport_create(struct Scsi_Host *shost, int channel,
3231 struct fc_vport_identifiers *ids)
3232 {
3233 int stat;
3234 struct fc_vport *vport;
3235
3236 stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
3237 ids, &vport);
3238 return stat ? NULL : vport;
3239 }
3240 EXPORT_SYMBOL(fc_vport_create);
3241
3242 /**
3243 * fc_vport_terminate - Admin App or LLDD requests termination of a vport
3244 * @vport: fc_vport to be terminated
3245 *
3246 * Calls the LLDD vport_delete() function, then deallocates and removes
3247 * the vport from the shost and object tree.
3248 *
3249 * Notes:
3250 * This routine assumes no locks are held on entry.
3251 */
3252 int
3253 fc_vport_terminate(struct fc_vport *vport)
3254 {
3255 struct Scsi_Host *shost = vport_to_shost(vport);
3256 struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
3257 struct fc_internal *i = to_fc_internal(shost->transportt);
3258 struct device *dev = &vport->dev;
3259 unsigned long flags;
3260 int stat;
3261
3262 spin_lock_irqsave(shost->host_lock, flags);
3263 if (vport->flags & FC_VPORT_CREATING) {
3264 spin_unlock_irqrestore(shost->host_lock, flags);
3265 return -EBUSY;
3266 }
3267 if (vport->flags & (FC_VPORT_DEL)) {
3268 spin_unlock_irqrestore(shost->host_lock, flags);
3269 return -EALREADY;
3270 }
3271 vport->flags |= FC_VPORT_DELETING;
3272 spin_unlock_irqrestore(shost->host_lock, flags);
3273
3274 if (i->f->vport_delete)
3275 stat = i->f->vport_delete(vport);
3276 else
3277 stat = -ENOENT;
3278
3279 spin_lock_irqsave(shost->host_lock, flags);
3280 vport->flags &= ~FC_VPORT_DELETING;
3281 if (!stat) {
3282 vport->flags |= FC_VPORT_DELETED;
3283 list_del(&vport->peers);
3284 fc_host->npiv_vports_inuse--;
3285 put_device(&shost->shost_gendev); /* for fc_host->vport list */
3286 }
3287 spin_unlock_irqrestore(shost->host_lock, flags);
3288
3289 if (stat)
3290 return stat;
3291
3292 if (dev->parent != &shost->shost_gendev)
3293 sysfs_remove_link(&shost->shost_gendev.kobj, dev->bus_id);
3294 transport_remove_device(dev);
3295 device_del(dev);
3296 transport_destroy_device(dev);
3297
3298 /*
3299 * Removing our self-reference should mean our
3300 * release function gets called, which will drop the remaining
3301 * parent reference and free the data structure.
3302 */
3303 put_device(dev); /* for self-reference */
3304
3305 return 0; /* SUCCESS */
3306 }
3307 EXPORT_SYMBOL(fc_vport_terminate);
3308
3309 /**
3310 * fc_vport_sched_delete - workq-based delete request for a vport
3311 * @work: vport to be deleted.
3312 */
3313 static void
3314 fc_vport_sched_delete(struct work_struct *work)
3315 {
3316 struct fc_vport *vport =
3317 container_of(work, struct fc_vport, vport_delete_work);
3318 int stat;
3319
3320 stat = fc_vport_terminate(vport);
3321 if (stat)
3322 dev_printk(KERN_ERR, vport->dev.parent,
3323 "%s: %s could not be deleted created via "
3324 "shost%d channel %d - error %d\n", __func__,
3325 vport->dev.bus_id, vport->shost->host_no,
3326 vport->channel, stat);
3327 }
3328
3329
3330 /* Original Author: Martin Hicks */
3331 MODULE_AUTHOR("James Smart");
3332 MODULE_DESCRIPTION("FC Transport Attributes");
3333 MODULE_LICENSE("GPL");
3334
3335 module_init(fc_transport_init);
3336 module_exit(fc_transport_exit);
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