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