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[ARM] Update mach-types
[linux-2.6/sactl.git] / drivers / scsi / scsi_transport_fc.c
blob6cd5931d9a54a005987a31329399088c93187083
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) 2004-2005 James Smart, Emulex Corporation
23 * Rewrite for host, target, device, and remote port attributes,
24 * statistics, and service functions...
25 *
26 */
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/sched.h> /* workqueue stuff, HZ */
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_priv.h"
35
36 /*
37 * Redefine so that we can have same named attributes in the
38 * sdev/starget/host objects.
39 */
40 #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
41 struct class_device_attribute class_device_attr_##_prefix##_##_name = \
42 __ATTR(_name,_mode,_show,_store)
43
44 #define fc_enum_name_search(title, table_type, table) \
45 static const char *get_fc_##title##_name(enum table_type table_key) \
46 { \
47 int i; \
48 char *name = NULL; \
49 \
50 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
51 if (table[i].value == table_key) { \
52 name = table[i].name; \
53 break; \
54 } \
55 } \
56 return name; \
57 }
58
59 #define fc_enum_name_match(title, table_type, table) \
60 static int get_fc_##title##_match(const char *table_key, \
61 enum table_type *value) \
62 { \
63 int i; \
64 \
65 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
66 if (strncmp(table_key, table[i].name, \
67 table[i].matchlen) == 0) { \
68 *value = table[i].value; \
69 return 0; /* success */ \
70 } \
71 } \
72 return 1; /* failure */ \
73 }
74
75
76 /* Convert fc_port_type values to ascii string name */
77 static struct {
78 enum fc_port_type value;
79 char *name;
80 } fc_port_type_names[] = {
81 { FC_PORTTYPE_UNKNOWN, "Unknown" },
82 { FC_PORTTYPE_OTHER, "Other" },
83 { FC_PORTTYPE_NOTPRESENT, "Not Present" },
84 { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" },
85 { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" },
86 { FC_PORTTYPE_LPORT, "LPort (private loop)" },
87 { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" },
88 };
89 fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
90 #define FC_PORTTYPE_MAX_NAMELEN 50
91
92
93 /* Convert fc_port_state values to ascii string name */
94 static struct {
95 enum fc_port_state value;
96 char *name;
97 } fc_port_state_names[] = {
98 { FC_PORTSTATE_UNKNOWN, "Unknown" },
99 { FC_PORTSTATE_NOTPRESENT, "Not Present" },
100 { FC_PORTSTATE_ONLINE, "Online" },
101 { FC_PORTSTATE_OFFLINE, "Offline" },
102 { FC_PORTSTATE_BLOCKED, "Blocked" },
103 { FC_PORTSTATE_BYPASSED, "Bypassed" },
104 { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" },
105 { FC_PORTSTATE_LINKDOWN, "Linkdown" },
106 { FC_PORTSTATE_ERROR, "Error" },
107 { FC_PORTSTATE_LOOPBACK, "Loopback" },
108 };
109 fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
110 #define FC_PORTSTATE_MAX_NAMELEN 20
111
112
113 /* Convert fc_tgtid_binding_type values to ascii string name */
114 static struct {
115 enum fc_tgtid_binding_type value;
116 char *name;
117 int matchlen;
118 } fc_tgtid_binding_type_names[] = {
119 { FC_TGTID_BIND_NONE, "none", 4 },
120 { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
121 { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
122 { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
123 };
124 fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
125 fc_tgtid_binding_type_names)
126 fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
127 fc_tgtid_binding_type_names)
128 #define FC_BINDTYPE_MAX_NAMELEN 30
129
130
131 #define fc_bitfield_name_search(title, table) \
132 static ssize_t \
133 get_fc_##title##_names(u32 table_key, char *buf) \
134 { \
135 char *prefix = ""; \
136 ssize_t len = 0; \
137 int i; \
138 \
139 for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \
140 if (table[i].value & table_key) { \
141 len += sprintf(buf + len, "%s%s", \
142 prefix, table[i].name); \
143 prefix = ", "; \
144 } \
145 } \
146 len += sprintf(buf + len, "\n"); \
147 return len; \
148 }
149
150
151 /* Convert FC_COS bit values to ascii string name */
152 static struct {
153 u32 value;
154 char *name;
155 } fc_cos_names[] = {
156 { FC_COS_CLASS1, "Class 1" },
157 { FC_COS_CLASS2, "Class 2" },
158 { FC_COS_CLASS3, "Class 3" },
159 { FC_COS_CLASS4, "Class 4" },
160 { FC_COS_CLASS6, "Class 6" },
161 };
162 fc_bitfield_name_search(cos, fc_cos_names)
163
164
165 /* Convert FC_PORTSPEED bit values to ascii string name */
166 static struct {
167 u32 value;
168 char *name;
169 } fc_port_speed_names[] = {
170 { FC_PORTSPEED_1GBIT, "1 Gbit" },
171 { FC_PORTSPEED_2GBIT, "2 Gbit" },
172 { FC_PORTSPEED_4GBIT, "4 Gbit" },
173 { FC_PORTSPEED_10GBIT, "10 Gbit" },
174 { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" },
175 };
176 fc_bitfield_name_search(port_speed, fc_port_speed_names)
177
178
179 static int
180 show_fc_fc4s (char *buf, u8 *fc4_list)
181 {
182 int i, len=0;
183
184 for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
185 len += sprintf(buf + len , "0x%02x ", *fc4_list);
186 len += sprintf(buf + len, "\n");
187 return len;
188 }
189
190
191 /* Convert FC_RPORT_ROLE bit values to ascii string name */
192 static struct {
193 u32 value;
194 char *name;
195 } fc_remote_port_role_names[] = {
196 { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" },
197 { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" },
198 { FC_RPORT_ROLE_IP_PORT, "IP Port" },
199 };
200 fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names)
201
202 /*
203 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
204 */
205 #define FC_WELLKNOWN_PORTID_MASK 0xfffff0
206 #define FC_WELLKNOWN_ROLE_MASK 0x00000f
207 #define FC_FPORT_PORTID 0x00000e
208 #define FC_FABCTLR_PORTID 0x00000d
209 #define FC_DIRSRVR_PORTID 0x00000c
210 #define FC_TIMESRVR_PORTID 0x00000b
211 #define FC_MGMTSRVR_PORTID 0x00000a
212
213
214 static void fc_timeout_deleted_rport(void *data);
215 static void fc_scsi_scan_rport(void *data);
216 static void fc_rport_terminate(struct fc_rport *rport);
217
218 /*
219 * Attribute counts pre object type...
220 * Increase these values if you add attributes
221 */
222 #define FC_STARGET_NUM_ATTRS 3
223 #define FC_RPORT_NUM_ATTRS 9
224 #define FC_HOST_NUM_ATTRS 16
225
226 struct fc_internal {
227 struct scsi_transport_template t;
228 struct fc_function_template *f;
229
230 /*
231 * For attributes : each object has :
232 * An array of the actual attributes structures
233 * An array of null-terminated pointers to the attribute
234 * structures - used for mid-layer interaction.
235 *
236 * The attribute containers for the starget and host are are
237 * part of the midlayer. As the remote port is specific to the
238 * fc transport, we must provide the attribute container.
239 */
240 struct class_device_attribute private_starget_attrs[
241 FC_STARGET_NUM_ATTRS];
242 struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
243
244 struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
245 struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
246
247 struct transport_container rport_attr_cont;
248 struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
249 struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
250 };
251
252 #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
253
254 static int fc_target_setup(struct transport_container *tc, struct device *dev,
255 struct class_device *cdev)
256 {
257 struct scsi_target *starget = to_scsi_target(dev);
258 struct fc_rport *rport = starget_to_rport(starget);
259
260 /*
261 * if parent is remote port, use values from remote port.
262 * Otherwise, this host uses the fc_transport, but not the
263 * remote port interface. As such, initialize to known non-values.
264 */
265 if (rport) {
266 fc_starget_node_name(starget) = rport->node_name;
267 fc_starget_port_name(starget) = rport->port_name;
268 fc_starget_port_id(starget) = rport->port_id;
269 } else {
270 fc_starget_node_name(starget) = -1;
271 fc_starget_port_name(starget) = -1;
272 fc_starget_port_id(starget) = -1;
273 }
274
275 return 0;
276 }
277
278 static DECLARE_TRANSPORT_CLASS(fc_transport_class,
279 "fc_transport",
280 fc_target_setup,
281 NULL,
282 NULL);
283
284 static int fc_host_setup(struct transport_container *tc, struct device *dev,
285 struct class_device *cdev)
286 {
287 struct Scsi_Host *shost = dev_to_shost(dev);
288
289 /*
290 * Set default values easily detected by the midlayer as
291 * failure cases. The scsi lldd is responsible for initializing
292 * all transport attributes to valid values per host.
293 */
294 fc_host_node_name(shost) = -1;
295 fc_host_port_name(shost) = -1;
296 fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED;
297 memset(fc_host_supported_fc4s(shost), 0,
298 sizeof(fc_host_supported_fc4s(shost)));
299 memset(fc_host_symbolic_name(shost), 0,
300 sizeof(fc_host_symbolic_name(shost)));
301 fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN;
302 fc_host_maxframe_size(shost) = -1;
303 memset(fc_host_serial_number(shost), 0,
304 sizeof(fc_host_serial_number(shost)));
305
306 fc_host_port_id(shost) = -1;
307 fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
308 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
309 memset(fc_host_active_fc4s(shost), 0,
310 sizeof(fc_host_active_fc4s(shost)));
311 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
312 fc_host_fabric_name(shost) = -1;
313
314 fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN;
315
316 INIT_LIST_HEAD(&fc_host_rports(shost));
317 INIT_LIST_HEAD(&fc_host_rport_bindings(shost));
318 fc_host_next_rport_number(shost) = 0;
319 fc_host_next_target_id(shost) = 0;
320
321 return 0;
322 }
323
324 static DECLARE_TRANSPORT_CLASS(fc_host_class,
325 "fc_host",
326 fc_host_setup,
327 NULL,
328 NULL);
329
330 /*
331 * Setup and Remove actions for remote ports are handled
332 * in the service functions below.
333 */
334 static DECLARE_TRANSPORT_CLASS(fc_rport_class,
335 "fc_remote_ports",
336 NULL,
337 NULL,
338 NULL);
339
340 /*
341 * Module Parameters
342 */
343
344 /*
345 * dev_loss_tmo: the default number of seconds that the FC transport
346 * should insulate the loss of a remote port.
347 * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
348 */
349 static unsigned int fc_dev_loss_tmo = SCSI_DEVICE_BLOCK_MAX_TIMEOUT;
350
351 module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR);
352 MODULE_PARM_DESC(dev_loss_tmo,
353 "Maximum number of seconds that the FC transport should"
354 " insulate the loss of a remote port. Once this value is"
355 " exceeded, the scsi target is removed. Value should be"
356 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT.");
357
358
359 static __init int fc_transport_init(void)
360 {
361 int error = transport_class_register(&fc_host_class);
362 if (error)
363 return error;
364 error = transport_class_register(&fc_rport_class);
365 if (error)
366 return error;
367 return transport_class_register(&fc_transport_class);
368 }
369
370 static void __exit fc_transport_exit(void)
371 {
372 transport_class_unregister(&fc_transport_class);
373 transport_class_unregister(&fc_rport_class);
374 transport_class_unregister(&fc_host_class);
375 }
376
377 /*
378 * FC Remote Port Attribute Management
379 */
380
381 #define fc_rport_show_function(field, format_string, sz, cast) \
382 static ssize_t \
383 show_fc_rport_##field (struct class_device *cdev, char *buf) \
384 { \
385 struct fc_rport *rport = transport_class_to_rport(cdev); \
386 struct Scsi_Host *shost = rport_to_shost(rport); \
387 struct fc_internal *i = to_fc_internal(shost->transportt); \
388 if ((i->f->get_rport_##field) && \
389 !((rport->port_state == FC_PORTSTATE_BLOCKED) || \
390 (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \
391 i->f->get_rport_##field(rport); \
392 return snprintf(buf, sz, format_string, cast rport->field); \
393 }
394
395 #define fc_rport_store_function(field) \
396 static ssize_t \
397 store_fc_rport_##field(struct class_device *cdev, const char *buf, \
398 size_t count) \
399 { \
400 int val; \
401 struct fc_rport *rport = transport_class_to_rport(cdev); \
402 struct Scsi_Host *shost = rport_to_shost(rport); \
403 struct fc_internal *i = to_fc_internal(shost->transportt); \
404 if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \
405 (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \
406 return -EBUSY; \
407 val = simple_strtoul(buf, NULL, 0); \
408 i->f->set_rport_##field(rport, val); \
409 return count; \
410 }
411
412 #define fc_rport_rd_attr(field, format_string, sz) \
413 fc_rport_show_function(field, format_string, sz, ) \
414 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
415 show_fc_rport_##field, NULL)
416
417 #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \
418 fc_rport_show_function(field, format_string, sz, (cast)) \
419 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
420 show_fc_rport_##field, NULL)
421
422 #define fc_rport_rw_attr(field, format_string, sz) \
423 fc_rport_show_function(field, format_string, sz, ) \
424 fc_rport_store_function(field) \
425 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \
426 show_fc_rport_##field, \
427 store_fc_rport_##field)
428
429
430 #define fc_private_rport_show_function(field, format_string, sz, cast) \
431 static ssize_t \
432 show_fc_rport_##field (struct class_device *cdev, char *buf) \
433 { \
434 struct fc_rport *rport = transport_class_to_rport(cdev); \
435 return snprintf(buf, sz, format_string, cast rport->field); \
436 }
437
438 #define fc_private_rport_rd_attr(field, format_string, sz) \
439 fc_private_rport_show_function(field, format_string, sz, ) \
440 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
441 show_fc_rport_##field, NULL)
442
443 #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \
444 fc_private_rport_show_function(field, format_string, sz, (cast)) \
445 static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \
446 show_fc_rport_##field, NULL)
447
448
449 #define fc_private_rport_rd_enum_attr(title, maxlen) \
450 static ssize_t \
451 show_fc_rport_##title (struct class_device *cdev, char *buf) \
452 { \
453 struct fc_rport *rport = transport_class_to_rport(cdev); \
454 const char *name; \
455 name = get_fc_##title##_name(rport->title); \
456 if (!name) \
457 return -EINVAL; \
458 return snprintf(buf, maxlen, "%s\n", name); \
459 } \
460 static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \
461 show_fc_rport_##title, NULL)
462
463
464 #define SETUP_RPORT_ATTRIBUTE_RD(field) \
465 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
466 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
467 i->private_rport_attrs[count].store = NULL; \
468 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
469 if (i->f->show_rport_##field) \
470 count++
471
472 #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \
473 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
474 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
475 i->private_rport_attrs[count].store = NULL; \
476 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
477 count++
478
479 #define SETUP_RPORT_ATTRIBUTE_RW(field) \
480 i->private_rport_attrs[count] = class_device_attr_rport_##field; \
481 if (!i->f->set_rport_##field) { \
482 i->private_rport_attrs[count].attr.mode = S_IRUGO; \
483 i->private_rport_attrs[count].store = NULL; \
484 } \
485 i->rport_attrs[count] = &i->private_rport_attrs[count]; \
486 if (i->f->show_rport_##field) \
487 count++
488
489
490 /* The FC Transport Remote Port Attributes: */
491
492 /* Fixed Remote Port Attributes */
493
494 fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
495
496 static ssize_t
497 show_fc_rport_supported_classes (struct class_device *cdev, char *buf)
498 {
499 struct fc_rport *rport = transport_class_to_rport(cdev);
500 if (rport->supported_classes == FC_COS_UNSPECIFIED)
501 return snprintf(buf, 20, "unspecified\n");
502 return get_fc_cos_names(rport->supported_classes, buf);
503 }
504 static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
505 show_fc_rport_supported_classes, NULL);
506
507 /* Dynamic Remote Port Attributes */
508
509 /*
510 * dev_loss_tmo attribute
511 */
512 fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
513 static ssize_t
514 store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf,
515 size_t count)
516 {
517 int val;
518 struct fc_rport *rport = transport_class_to_rport(cdev);
519 struct Scsi_Host *shost = rport_to_shost(rport);
520 struct fc_internal *i = to_fc_internal(shost->transportt);
521 if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
522 (rport->port_state == FC_PORTSTATE_NOTPRESENT))
523 return -EBUSY;
524 val = simple_strtoul(buf, NULL, 0);
525 if ((val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
526 return -EINVAL;
527 i->f->set_rport_dev_loss_tmo(rport, val);
528 return count;
529 }
530 static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
531 show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
532
533
534 /* Private Remote Port Attributes */
535
536 fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
537 fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
538 fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
539
540 static ssize_t
541 show_fc_rport_roles (struct class_device *cdev, char *buf)
542 {
543 struct fc_rport *rport = transport_class_to_rport(cdev);
544
545 /* identify any roles that are port_id specific */
546 if ((rport->port_id != -1) &&
547 (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
548 FC_WELLKNOWN_PORTID_MASK) {
549 switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
550 case FC_FPORT_PORTID:
551 return snprintf(buf, 30, "Fabric Port\n");
552 case FC_FABCTLR_PORTID:
553 return snprintf(buf, 30, "Fabric Controller\n");
554 case FC_DIRSRVR_PORTID:
555 return snprintf(buf, 30, "Directory Server\n");
556 case FC_TIMESRVR_PORTID:
557 return snprintf(buf, 30, "Time Server\n");
558 case FC_MGMTSRVR_PORTID:
559 return snprintf(buf, 30, "Management Server\n");
560 default:
561 return snprintf(buf, 30, "Unknown Fabric Entity\n");
562 }
563 } else {
564 if (rport->roles == FC_RPORT_ROLE_UNKNOWN)
565 return snprintf(buf, 20, "unknown\n");
566 return get_fc_remote_port_roles_names(rport->roles, buf);
567 }
568 }
569 static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO,
570 show_fc_rport_roles, NULL);
571
572 fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
573 fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
574
575
576
577 /*
578 * FC SCSI Target Attribute Management
579 */
580
581 /*
582 * Note: in the target show function we recognize when the remote
583 * port is in the heirarchy and do not allow the driver to get
584 * involved in sysfs functions. The driver only gets involved if
585 * it's the "old" style that doesn't use rports.
586 */
587 #define fc_starget_show_function(field, format_string, sz, cast) \
588 static ssize_t \
589 show_fc_starget_##field (struct class_device *cdev, char *buf) \
590 { \
591 struct scsi_target *starget = transport_class_to_starget(cdev); \
592 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \
593 struct fc_internal *i = to_fc_internal(shost->transportt); \
594 struct fc_rport *rport = starget_to_rport(starget); \
595 if (rport) \
596 fc_starget_##field(starget) = rport->field; \
597 else if (i->f->get_starget_##field) \
598 i->f->get_starget_##field(starget); \
599 return snprintf(buf, sz, format_string, \
600 cast fc_starget_##field(starget)); \
601 }
602
603 #define fc_starget_rd_attr(field, format_string, sz) \
604 fc_starget_show_function(field, format_string, sz, ) \
605 static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
606 show_fc_starget_##field, NULL)
607
608 #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \
609 fc_starget_show_function(field, format_string, sz, (cast)) \
610 static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
611 show_fc_starget_##field, NULL)
612
613 #define SETUP_STARGET_ATTRIBUTE_RD(field) \
614 i->private_starget_attrs[count] = class_device_attr_starget_##field; \
615 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
616 i->private_starget_attrs[count].store = NULL; \
617 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
618 if (i->f->show_starget_##field) \
619 count++
620
621 #define SETUP_STARGET_ATTRIBUTE_RW(field) \
622 i->private_starget_attrs[count] = class_device_attr_starget_##field; \
623 if (!i->f->set_starget_##field) { \
624 i->private_starget_attrs[count].attr.mode = S_IRUGO; \
625 i->private_starget_attrs[count].store = NULL; \
626 } \
627 i->starget_attrs[count] = &i->private_starget_attrs[count]; \
628 if (i->f->show_starget_##field) \
629 count++
630
631 /* The FC Transport SCSI Target Attributes: */
632 fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
633 fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
634 fc_starget_rd_attr(port_id, "0x%06x\n", 20);
635
636
637 /*
638 * Host Attribute Management
639 */
640
641 #define fc_host_show_function(field, format_string, sz, cast) \
642 static ssize_t \
643 show_fc_host_##field (struct class_device *cdev, char *buf) \
644 { \
645 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
646 struct fc_internal *i = to_fc_internal(shost->transportt); \
647 if (i->f->get_host_##field) \
648 i->f->get_host_##field(shost); \
649 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
650 }
651
652 #define fc_host_store_function(field) \
653 static ssize_t \
654 store_fc_host_##field(struct class_device *cdev, const char *buf, \
655 size_t count) \
656 { \
657 int val; \
658 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
659 struct fc_internal *i = to_fc_internal(shost->transportt); \
660 \
661 val = simple_strtoul(buf, NULL, 0); \
662 i->f->set_host_##field(shost, val); \
663 return count; \
664 }
665
666 #define fc_host_rd_attr(field, format_string, sz) \
667 fc_host_show_function(field, format_string, sz, ) \
668 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
669 show_fc_host_##field, NULL)
670
671 #define fc_host_rd_attr_cast(field, format_string, sz, cast) \
672 fc_host_show_function(field, format_string, sz, (cast)) \
673 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
674 show_fc_host_##field, NULL)
675
676 #define fc_host_rw_attr(field, format_string, sz) \
677 fc_host_show_function(field, format_string, sz, ) \
678 fc_host_store_function(field) \
679 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \
680 show_fc_host_##field, \
681 store_fc_host_##field)
682
683 #define fc_host_rd_enum_attr(title, maxlen) \
684 static ssize_t \
685 show_fc_host_##title (struct class_device *cdev, char *buf) \
686 { \
687 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
688 struct fc_internal *i = to_fc_internal(shost->transportt); \
689 const char *name; \
690 if (i->f->get_host_##title) \
691 i->f->get_host_##title(shost); \
692 name = get_fc_##title##_name(fc_host_##title(shost)); \
693 if (!name) \
694 return -EINVAL; \
695 return snprintf(buf, maxlen, "%s\n", name); \
696 } \
697 static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
698
699 #define SETUP_HOST_ATTRIBUTE_RD(field) \
700 i->private_host_attrs[count] = class_device_attr_host_##field; \
701 i->private_host_attrs[count].attr.mode = S_IRUGO; \
702 i->private_host_attrs[count].store = NULL; \
703 i->host_attrs[count] = &i->private_host_attrs[count]; \
704 if (i->f->show_host_##field) \
705 count++
706
707 #define SETUP_HOST_ATTRIBUTE_RW(field) \
708 i->private_host_attrs[count] = class_device_attr_host_##field; \
709 if (!i->f->set_host_##field) { \
710 i->private_host_attrs[count].attr.mode = S_IRUGO; \
711 i->private_host_attrs[count].store = NULL; \
712 } \
713 i->host_attrs[count] = &i->private_host_attrs[count]; \
714 if (i->f->show_host_##field) \
715 count++
716
717
718 #define fc_private_host_show_function(field, format_string, sz, cast) \
719 static ssize_t \
720 show_fc_host_##field (struct class_device *cdev, char *buf) \
721 { \
722 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
723 return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
724 }
725
726 #define fc_private_host_rd_attr(field, format_string, sz) \
727 fc_private_host_show_function(field, format_string, sz, ) \
728 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
729 show_fc_host_##field, NULL)
730
731 #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \
732 fc_private_host_show_function(field, format_string, sz, (cast)) \
733 static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \
734 show_fc_host_##field, NULL)
735
736 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \
737 i->private_host_attrs[count] = class_device_attr_host_##field; \
738 i->private_host_attrs[count].attr.mode = S_IRUGO; \
739 i->private_host_attrs[count].store = NULL; \
740 i->host_attrs[count] = &i->private_host_attrs[count]; \
741 count++
742
743 #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \
744 { \
745 i->private_host_attrs[count] = class_device_attr_host_##field; \
746 i->host_attrs[count] = &i->private_host_attrs[count]; \
747 count++; \
748 }
749
750
751 /* Fixed Host Attributes */
752
753 static ssize_t
754 show_fc_host_supported_classes (struct class_device *cdev, char *buf)
755 {
756 struct Scsi_Host *shost = transport_class_to_shost(cdev);
757
758 if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
759 return snprintf(buf, 20, "unspecified\n");
760
761 return get_fc_cos_names(fc_host_supported_classes(shost), buf);
762 }
763 static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO,
764 show_fc_host_supported_classes, NULL);
765
766 static ssize_t
767 show_fc_host_supported_fc4s (struct class_device *cdev, char *buf)
768 {
769 struct Scsi_Host *shost = transport_class_to_shost(cdev);
770 return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
771 }
772 static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
773 show_fc_host_supported_fc4s, NULL);
774
775 static ssize_t
776 show_fc_host_supported_speeds (struct class_device *cdev, char *buf)
777 {
778 struct Scsi_Host *shost = transport_class_to_shost(cdev);
779
780 if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
781 return snprintf(buf, 20, "unknown\n");
782
783 return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
784 }
785 static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
786 show_fc_host_supported_speeds, NULL);
787
788
789 fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
790 fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
791 fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1));
792 fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
793 fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
794
795
796 /* Dynamic Host Attributes */
797
798 static ssize_t
799 show_fc_host_active_fc4s (struct class_device *cdev, char *buf)
800 {
801 struct Scsi_Host *shost = transport_class_to_shost(cdev);
802 struct fc_internal *i = to_fc_internal(shost->transportt);
803
804 if (i->f->get_host_active_fc4s)
805 i->f->get_host_active_fc4s(shost);
806
807 return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
808 }
809 static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
810 show_fc_host_active_fc4s, NULL);
811
812 static ssize_t
813 show_fc_host_speed (struct class_device *cdev, char *buf)
814 {
815 struct Scsi_Host *shost = transport_class_to_shost(cdev);
816 struct fc_internal *i = to_fc_internal(shost->transportt);
817
818 if (i->f->get_host_speed)
819 i->f->get_host_speed(shost);
820
821 if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
822 return snprintf(buf, 20, "unknown\n");
823
824 return get_fc_port_speed_names(fc_host_speed(shost), buf);
825 }
826 static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO,
827 show_fc_host_speed, NULL);
828
829
830 fc_host_rd_attr(port_id, "0x%06x\n", 20);
831 fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
832 fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
833 fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
834
835
836 /* Private Host Attributes */
837
838 static ssize_t
839 show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf)
840 {
841 struct Scsi_Host *shost = transport_class_to_shost(cdev);
842 const char *name;
843
844 name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
845 if (!name)
846 return -EINVAL;
847 return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
848 }
849
850 #define get_list_head_entry(pos, head, member) \
851 pos = list_entry((head)->next, typeof(*pos), member)
852
853 static ssize_t
854 store_fc_private_host_tgtid_bind_type(struct class_device *cdev,
855 const char *buf, size_t count)
856 {
857 struct Scsi_Host *shost = transport_class_to_shost(cdev);
858 struct fc_rport *rport;
859 enum fc_tgtid_binding_type val;
860 unsigned long flags;
861
862 if (get_fc_tgtid_bind_type_match(buf, &val))
863 return -EINVAL;
864
865 /* if changing bind type, purge all unused consistent bindings */
866 if (val != fc_host_tgtid_bind_type(shost)) {
867 spin_lock_irqsave(shost->host_lock, flags);
868 while (!list_empty(&fc_host_rport_bindings(shost))) {
869 get_list_head_entry(rport,
870 &fc_host_rport_bindings(shost), peers);
871 spin_unlock_irqrestore(shost->host_lock, flags);
872 fc_rport_terminate(rport);
873 spin_lock_irqsave(shost->host_lock, flags);
874 }
875 spin_unlock_irqrestore(shost->host_lock, flags);
876 }
877
878 fc_host_tgtid_bind_type(shost) = val;
879 return count;
880 }
881
882 static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
883 show_fc_private_host_tgtid_bind_type,
884 store_fc_private_host_tgtid_bind_type);
885
886 static ssize_t
887 store_fc_private_host_issue_lip(struct class_device *cdev,
888 const char *buf, size_t count)
889 {
890 struct Scsi_Host *shost = transport_class_to_shost(cdev);
891 struct fc_internal *i = to_fc_internal(shost->transportt);
892 int ret;
893
894 /* ignore any data value written to the attribute */
895 if (i->f->issue_fc_host_lip) {
896 ret = i->f->issue_fc_host_lip(shost);
897 return ret ? ret: count;
898 }
899
900 return -ENOENT;
901 }
902
903 static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
904 store_fc_private_host_issue_lip);
905
906 /*
907 * Host Statistics Management
908 */
909
910 /* Show a given an attribute in the statistics group */
911 static ssize_t
912 fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset)
913 {
914 struct Scsi_Host *shost = transport_class_to_shost(cdev);
915 struct fc_internal *i = to_fc_internal(shost->transportt);
916 struct fc_host_statistics *stats;
917 ssize_t ret = -ENOENT;
918
919 if (offset > sizeof(struct fc_host_statistics) ||
920 offset % sizeof(u64) != 0)
921 WARN_ON(1);
922
923 if (i->f->get_fc_host_stats) {
924 stats = (i->f->get_fc_host_stats)(shost);
925 if (stats)
926 ret = snprintf(buf, 20, "0x%llx\n",
927 (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
928 }
929 return ret;
930 }
931
932
933 /* generate a read-only statistics attribute */
934 #define fc_host_statistic(name) \
935 static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \
936 { \
937 return fc_stat_show(cd, buf, \
938 offsetof(struct fc_host_statistics, name)); \
939 } \
940 static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
941
942 fc_host_statistic(seconds_since_last_reset);
943 fc_host_statistic(tx_frames);
944 fc_host_statistic(tx_words);
945 fc_host_statistic(rx_frames);
946 fc_host_statistic(rx_words);
947 fc_host_statistic(lip_count);
948 fc_host_statistic(nos_count);
949 fc_host_statistic(error_frames);
950 fc_host_statistic(dumped_frames);
951 fc_host_statistic(link_failure_count);
952 fc_host_statistic(loss_of_sync_count);
953 fc_host_statistic(loss_of_signal_count);
954 fc_host_statistic(prim_seq_protocol_err_count);
955 fc_host_statistic(invalid_tx_word_count);
956 fc_host_statistic(invalid_crc_count);
957 fc_host_statistic(fcp_input_requests);
958 fc_host_statistic(fcp_output_requests);
959 fc_host_statistic(fcp_control_requests);
960 fc_host_statistic(fcp_input_megabytes);
961 fc_host_statistic(fcp_output_megabytes);
962
963 static ssize_t
964 fc_reset_statistics(struct class_device *cdev, const char *buf,
965 size_t count)
966 {
967 struct Scsi_Host *shost = transport_class_to_shost(cdev);
968 struct fc_internal *i = to_fc_internal(shost->transportt);
969
970 /* ignore any data value written to the attribute */
971 if (i->f->reset_fc_host_stats) {
972 i->f->reset_fc_host_stats(shost);
973 return count;
974 }
975
976 return -ENOENT;
977 }
978 static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
979 fc_reset_statistics);
980
981
982 static struct attribute *fc_statistics_attrs[] = {
983 &class_device_attr_host_seconds_since_last_reset.attr,
984 &class_device_attr_host_tx_frames.attr,
985 &class_device_attr_host_tx_words.attr,
986 &class_device_attr_host_rx_frames.attr,
987 &class_device_attr_host_rx_words.attr,
988 &class_device_attr_host_lip_count.attr,
989 &class_device_attr_host_nos_count.attr,
990 &class_device_attr_host_error_frames.attr,
991 &class_device_attr_host_dumped_frames.attr,
992 &class_device_attr_host_link_failure_count.attr,
993 &class_device_attr_host_loss_of_sync_count.attr,
994 &class_device_attr_host_loss_of_signal_count.attr,
995 &class_device_attr_host_prim_seq_protocol_err_count.attr,
996 &class_device_attr_host_invalid_tx_word_count.attr,
997 &class_device_attr_host_invalid_crc_count.attr,
998 &class_device_attr_host_fcp_input_requests.attr,
999 &class_device_attr_host_fcp_output_requests.attr,
1000 &class_device_attr_host_fcp_control_requests.attr,
1001 &class_device_attr_host_fcp_input_megabytes.attr,
1002 &class_device_attr_host_fcp_output_megabytes.attr,
1003 &class_device_attr_host_reset_statistics.attr,
1004 NULL
1005 };
1006
1007 static struct attribute_group fc_statistics_group = {
1008 .name = "statistics",
1009 .attrs = fc_statistics_attrs,
1010 };
1011
1012 static int fc_host_match(struct attribute_container *cont,
1013 struct device *dev)
1014 {
1015 struct Scsi_Host *shost;
1016 struct fc_internal *i;
1017
1018 if (!scsi_is_host_device(dev))
1019 return 0;
1020
1021 shost = dev_to_shost(dev);
1022 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1023 != &fc_host_class.class)
1024 return 0;
1025
1026 i = to_fc_internal(shost->transportt);
1027
1028 return &i->t.host_attrs.ac == cont;
1029 }
1030
1031 static int fc_target_match(struct attribute_container *cont,
1032 struct device *dev)
1033 {
1034 struct Scsi_Host *shost;
1035 struct fc_internal *i;
1036
1037 if (!scsi_is_target_device(dev))
1038 return 0;
1039
1040 shost = dev_to_shost(dev->parent);
1041 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1042 != &fc_host_class.class)
1043 return 0;
1044
1045 i = to_fc_internal(shost->transportt);
1046
1047 return &i->t.target_attrs.ac == cont;
1048 }
1049
1050 static void fc_rport_dev_release(struct device *dev)
1051 {
1052 struct fc_rport *rport = dev_to_rport(dev);
1053 put_device(dev->parent);
1054 kfree(rport);
1055 }
1056
1057 int scsi_is_fc_rport(const struct device *dev)
1058 {
1059 return dev->release == fc_rport_dev_release;
1060 }
1061 EXPORT_SYMBOL(scsi_is_fc_rport);
1062
1063 static int fc_rport_match(struct attribute_container *cont,
1064 struct device *dev)
1065 {
1066 struct Scsi_Host *shost;
1067 struct fc_internal *i;
1068
1069 if (!scsi_is_fc_rport(dev))
1070 return 0;
1071
1072 shost = dev_to_shost(dev->parent);
1073 if (!shost->transportt || shost->transportt->host_attrs.ac.class
1074 != &fc_host_class.class)
1075 return 0;
1076
1077 i = to_fc_internal(shost->transportt);
1078
1079 return &i->rport_attr_cont.ac == cont;
1080 }
1081
1082
1083 /*
1084 * Must be called with shost->host_lock held
1085 */
1086 static struct device *fc_target_parent(struct Scsi_Host *shost,
1087 int channel, uint id)
1088 {
1089 struct fc_rport *rport;
1090
1091 list_for_each_entry(rport, &fc_host_rports(shost), peers)
1092 if ((rport->channel == channel) &&
1093 (rport->scsi_target_id == id))
1094 return &rport->dev;
1095
1096 return NULL;
1097 }
1098
1099 struct scsi_transport_template *
1100 fc_attach_transport(struct fc_function_template *ft)
1101 {
1102 struct fc_internal *i = kmalloc(sizeof(struct fc_internal),
1103 GFP_KERNEL);
1104 int count;
1105
1106 if (unlikely(!i))
1107 return NULL;
1108
1109 memset(i, 0, sizeof(struct fc_internal));
1110
1111 i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
1112 i->t.target_attrs.ac.class = &fc_transport_class.class;
1113 i->t.target_attrs.ac.match = fc_target_match;
1114 i->t.target_size = sizeof(struct fc_starget_attrs);
1115 transport_container_register(&i->t.target_attrs);
1116
1117 i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1118 i->t.host_attrs.ac.class = &fc_host_class.class;
1119 i->t.host_attrs.ac.match = fc_host_match;
1120 i->t.host_size = sizeof(struct fc_host_attrs);
1121 if (ft->get_fc_host_stats)
1122 i->t.host_attrs.statistics = &fc_statistics_group;
1123 transport_container_register(&i->t.host_attrs);
1124
1125 i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
1126 i->rport_attr_cont.ac.class = &fc_rport_class.class;
1127 i->rport_attr_cont.ac.match = fc_rport_match;
1128 transport_container_register(&i->rport_attr_cont);
1129
1130 i->f = ft;
1131
1132 /* Transport uses the shost workq for scsi scanning */
1133 i->t.create_work_queue = 1;
1134
1135 i->t.target_parent = fc_target_parent;
1136
1137 /*
1138 * Setup SCSI Target Attributes.
1139 */
1140 count = 0;
1141 SETUP_STARGET_ATTRIBUTE_RD(node_name);
1142 SETUP_STARGET_ATTRIBUTE_RD(port_name);
1143 SETUP_STARGET_ATTRIBUTE_RD(port_id);
1144
1145 BUG_ON(count > FC_STARGET_NUM_ATTRS);
1146
1147 i->starget_attrs[count] = NULL;
1148
1149
1150 /*
1151 * Setup SCSI Host Attributes.
1152 */
1153 count=0;
1154 SETUP_HOST_ATTRIBUTE_RD(node_name);
1155 SETUP_HOST_ATTRIBUTE_RD(port_name);
1156 SETUP_HOST_ATTRIBUTE_RD(supported_classes);
1157 SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
1158 SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
1159 SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
1160 SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
1161 SETUP_HOST_ATTRIBUTE_RD(serial_number);
1162
1163 SETUP_HOST_ATTRIBUTE_RD(port_id);
1164 SETUP_HOST_ATTRIBUTE_RD(port_type);
1165 SETUP_HOST_ATTRIBUTE_RD(port_state);
1166 SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
1167 SETUP_HOST_ATTRIBUTE_RD(speed);
1168 SETUP_HOST_ATTRIBUTE_RD(fabric_name);
1169
1170 /* Transport-managed attributes */
1171 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
1172 if (ft->issue_fc_host_lip)
1173 SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
1174
1175 BUG_ON(count > FC_HOST_NUM_ATTRS);
1176
1177 i->host_attrs[count] = NULL;
1178
1179 /*
1180 * Setup Remote Port Attributes.
1181 */
1182 count=0;
1183 SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
1184 SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
1185 SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
1186 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
1187 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
1188 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
1189 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
1190 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
1191 SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
1192
1193 BUG_ON(count > FC_RPORT_NUM_ATTRS);
1194
1195 i->rport_attrs[count] = NULL;
1196
1197 return &i->t;
1198 }
1199 EXPORT_SYMBOL(fc_attach_transport);
1200
1201 void fc_release_transport(struct scsi_transport_template *t)
1202 {
1203 struct fc_internal *i = to_fc_internal(t);
1204
1205 transport_container_unregister(&i->t.target_attrs);
1206 transport_container_unregister(&i->t.host_attrs);
1207 transport_container_unregister(&i->rport_attr_cont);
1208
1209 kfree(i);
1210 }
1211 EXPORT_SYMBOL(fc_release_transport);
1212
1213
1214 /**
1215 * fc_remove_host - called to terminate any fc_transport-related elements
1216 * for a scsi host.
1217 * @rport: remote port to be unblocked.
1218 *
1219 * This routine is expected to be called immediately preceeding the
1220 * a driver's call to scsi_remove_host().
1221 *
1222 * WARNING: A driver utilizing the fc_transport, which fails to call
1223 * this routine prior to scsi_remote_host(), will leave dangling
1224 * objects in /sys/class/fc_remote_ports. Access to any of these
1225 * objects can result in a system crash !!!
1226 *
1227 * Notes:
1228 * This routine assumes no locks are held on entry.
1229 **/
1230 void
1231 fc_remove_host(struct Scsi_Host *shost)
1232 {
1233 struct fc_rport *rport, *next_rport;
1234
1235 /* Remove any remote ports */
1236 list_for_each_entry_safe(rport, next_rport,
1237 &fc_host_rports(shost), peers)
1238 fc_rport_terminate(rport);
1239 list_for_each_entry_safe(rport, next_rport,
1240 &fc_host_rport_bindings(shost), peers)
1241 fc_rport_terminate(rport);
1242 }
1243 EXPORT_SYMBOL(fc_remove_host);
1244
1245 /*
1246 * fc_rport_tgt_remove - Removes the scsi target on the remote port
1247 * @rport: The remote port to be operated on
1248 */
1249 static void
1250 fc_rport_tgt_remove(struct fc_rport *rport)
1251 {
1252 struct Scsi_Host *shost = rport_to_shost(rport);
1253
1254 scsi_target_unblock(&rport->dev);
1255
1256 /* Stop anything on the workq */
1257 if (!cancel_delayed_work(&rport->dev_loss_work))
1258 flush_scheduled_work();
1259 scsi_flush_work(shost);
1260
1261 scsi_remove_target(&rport->dev);
1262 }
1263
1264 /**
1265 * fc_rport_create - allocates and creates a remote FC port.
1266 * @shost: scsi host the remote port is connected to.
1267 * @channel: Channel on shost port connected to.
1268 * @ids: The world wide names, fc address, and FC4 port
1269 * roles for the remote port.
1270 *
1271 * Allocates and creates the remoter port structure, including the
1272 * class and sysfs creation.
1273 *
1274 * Notes:
1275 * This routine assumes no locks are held on entry.
1276 **/
1277 struct fc_rport *
1278 fc_rport_create(struct Scsi_Host *shost, int channel,
1279 struct fc_rport_identifiers *ids)
1280 {
1281 struct fc_host_attrs *fc_host =
1282 (struct fc_host_attrs *)shost->shost_data;
1283 struct fc_internal *fci = to_fc_internal(shost->transportt);
1284 struct fc_rport *rport;
1285 struct device *dev;
1286 unsigned long flags;
1287 int error;
1288 size_t size;
1289
1290 size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
1291 rport = kmalloc(size, GFP_KERNEL);
1292 if (unlikely(!rport)) {
1293 printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
1294 return NULL;
1295 }
1296 memset(rport, 0, size);
1297
1298 rport->maxframe_size = -1;
1299 rport->supported_classes = FC_COS_UNSPECIFIED;
1300 rport->dev_loss_tmo = fc_dev_loss_tmo;
1301 memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
1302 memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
1303 rport->port_id = ids->port_id;
1304 rport->roles = ids->roles;
1305 rport->port_state = FC_PORTSTATE_ONLINE;
1306 if (fci->f->dd_fcrport_size)
1307 rport->dd_data = &rport[1];
1308 rport->channel = channel;
1309
1310 INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport);
1311 INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport);
1312
1313 spin_lock_irqsave(shost->host_lock, flags);
1314
1315 rport->number = fc_host->next_rport_number++;
1316 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1317 rport->scsi_target_id = fc_host->next_target_id++;
1318 else
1319 rport->scsi_target_id = -1;
1320 list_add_tail(&rport->peers, &fc_host_rports(shost));
1321 get_device(&shost->shost_gendev);
1322
1323 spin_unlock_irqrestore(shost->host_lock, flags);
1324
1325 dev = &rport->dev;
1326 device_initialize(dev);
1327 dev->parent = get_device(&shost->shost_gendev);
1328 dev->release = fc_rport_dev_release;
1329 sprintf(dev->bus_id, "rport-%d:%d-%d",
1330 shost->host_no, channel, rport->number);
1331 transport_setup_device(dev);
1332
1333 error = device_add(dev);
1334 if (error) {
1335 printk(KERN_ERR "FC Remote Port device_add failed\n");
1336 goto delete_rport;
1337 }
1338 transport_add_device(dev);
1339 transport_configure_device(dev);
1340
1341 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1342 /* initiate a scan of the target */
1343 scsi_queue_work(shost, &rport->scan_work);
1344
1345 return rport;
1346
1347 delete_rport:
1348 transport_destroy_device(dev);
1349 put_device(dev->parent);
1350 spin_lock_irqsave(shost->host_lock, flags);
1351 list_del(&rport->peers);
1352 put_device(&shost->shost_gendev);
1353 spin_unlock_irqrestore(shost->host_lock, flags);
1354 put_device(dev->parent);
1355 kfree(rport);
1356 return NULL;
1357 }
1358
1359 /**
1360 * fc_remote_port_add - notifies the fc transport of the existence
1361 * of a remote FC port.
1362 * @shost: scsi host the remote port is connected to.
1363 * @channel: Channel on shost port connected to.
1364 * @ids: The world wide names, fc address, and FC4 port
1365 * roles for the remote port.
1366 *
1367 * The LLDD calls this routine to notify the transport of the existence
1368 * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
1369 * of the port, it's FC address (port_id), and the FC4 roles that are
1370 * active for the port.
1371 *
1372 * For ports that are FCP targets (aka scsi targets), the FC transport
1373 * maintains consistent target id bindings on behalf of the LLDD.
1374 * A consistent target id binding is an assignment of a target id to
1375 * a remote port identifier, which persists while the scsi host is
1376 * attached. The remote port can disappear, then later reappear, and
1377 * it's target id assignment remains the same. This allows for shifts
1378 * in FC addressing (if binding by wwpn or wwnn) with no apparent
1379 * changes to the scsi subsystem which is based on scsi host number and
1380 * target id values. Bindings are only valid during the attachment of
1381 * the scsi host. If the host detaches, then later re-attaches, target
1382 * id bindings may change.
1383 *
1384 * This routine is responsible for returning a remote port structure.
1385 * The routine will search the list of remote ports it maintains
1386 * internally on behalf of consistent target id mappings. If found, the
1387 * remote port structure will be reused. Otherwise, a new remote port
1388 * structure will be allocated.
1389 *
1390 * Whenever a remote port is allocated, a new fc_remote_port class
1391 * device is created.
1392 *
1393 * Should not be called from interrupt context.
1394 *
1395 * Notes:
1396 * This routine assumes no locks are held on entry.
1397 **/
1398 struct fc_rport *
1399 fc_remote_port_add(struct Scsi_Host *shost, int channel,
1400 struct fc_rport_identifiers *ids)
1401 {
1402 struct fc_internal *fci = to_fc_internal(shost->transportt);
1403 struct fc_rport *rport;
1404 unsigned long flags;
1405 int match = 0;
1406
1407 /*
1408 * Search the list of "active" rports, for an rport that has been
1409 * deleted, but we've held off the real delete while the target
1410 * is in a "blocked" state.
1411 */
1412 spin_lock_irqsave(shost->host_lock, flags);
1413
1414 list_for_each_entry(rport, &fc_host_rports(shost), peers) {
1415
1416 if ((rport->port_state == FC_PORTSTATE_BLOCKED) &&
1417 (rport->channel == channel)) {
1418
1419 switch (fc_host_tgtid_bind_type(shost)) {
1420 case FC_TGTID_BIND_BY_WWPN:
1421 case FC_TGTID_BIND_NONE:
1422 if (rport->port_name == ids->port_name)
1423 match = 1;
1424 break;
1425 case FC_TGTID_BIND_BY_WWNN:
1426 if (rport->node_name == ids->node_name)
1427 match = 1;
1428 break;
1429 case FC_TGTID_BIND_BY_ID:
1430 if (rport->port_id == ids->port_id)
1431 match = 1;
1432 break;
1433 }
1434
1435 if (match) {
1436 struct work_struct *work =
1437 &rport->dev_loss_work;
1438
1439 memcpy(&rport->node_name, &ids->node_name,
1440 sizeof(rport->node_name));
1441 memcpy(&rport->port_name, &ids->port_name,
1442 sizeof(rport->port_name));
1443 rport->port_id = ids->port_id;
1444
1445 rport->port_state = FC_PORTSTATE_ONLINE;
1446 rport->roles = ids->roles;
1447
1448 spin_unlock_irqrestore(shost->host_lock, flags);
1449
1450 if (fci->f->dd_fcrport_size)
1451 memset(rport->dd_data, 0,
1452 fci->f->dd_fcrport_size);
1453
1454 /*
1455 * If we were blocked, we were a target.
1456 * If no longer a target, we leave the timer
1457 * running in case the port changes roles
1458 * prior to the timer expiring. If the timer
1459 * fires, the target will be torn down.
1460 */
1461 if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET))
1462 return rport;
1463
1464 /* restart the target */
1465
1466 /*
1467 * Stop the target timer first. Take no action
1468 * on the del_timer failure as the state
1469 * machine state change will validate the
1470 * transaction.
1471 */
1472 if (!cancel_delayed_work(work))
1473 flush_scheduled_work();
1474
1475 /* initiate a scan of the target */
1476 scsi_queue_work(shost, &rport->scan_work);
1477
1478 return rport;
1479 }
1480 }
1481 }
1482
1483 /* Search the bindings array */
1484 if (likely((ids->roles & FC_RPORT_ROLE_FCP_TARGET) &&
1485 (fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE))) {
1486
1487 /* search for a matching consistent binding */
1488
1489 list_for_each_entry(rport, &fc_host_rport_bindings(shost),
1490 peers) {
1491 if (rport->channel != channel)
1492 continue;
1493
1494 switch (fc_host_tgtid_bind_type(shost)) {
1495 case FC_TGTID_BIND_BY_WWPN:
1496 if (rport->port_name == ids->port_name)
1497 match = 1;
1498 break;
1499 case FC_TGTID_BIND_BY_WWNN:
1500 if (rport->node_name == ids->node_name)
1501 match = 1;
1502 break;
1503 case FC_TGTID_BIND_BY_ID:
1504 if (rport->port_id == ids->port_id)
1505 match = 1;
1506 break;
1507 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
1508 break;
1509 }
1510
1511 if (match) {
1512 list_move_tail(&rport->peers,
1513 &fc_host_rports(shost));
1514 break;
1515 }
1516 }
1517
1518 if (match) {
1519 memcpy(&rport->node_name, &ids->node_name,
1520 sizeof(rport->node_name));
1521 memcpy(&rport->port_name, &ids->port_name,
1522 sizeof(rport->port_name));
1523 rport->port_id = ids->port_id;
1524 rport->roles = ids->roles;
1525 rport->port_state = FC_PORTSTATE_ONLINE;
1526
1527 spin_unlock_irqrestore(shost->host_lock, flags);
1528
1529 if (fci->f->dd_fcrport_size)
1530 memset(rport->dd_data, 0,
1531 fci->f->dd_fcrport_size);
1532
1533 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
1534 /* initiate a scan of the target */
1535 scsi_queue_work(shost, &rport->scan_work);
1536
1537 return rport;
1538 }
1539 }
1540
1541 spin_unlock_irqrestore(shost->host_lock, flags);
1542
1543 /* No consistent binding found - create new remote port entry */
1544 rport = fc_rport_create(shost, channel, ids);
1545
1546 return rport;
1547 }
1548 EXPORT_SYMBOL(fc_remote_port_add);
1549
1550 /*
1551 * fc_rport_terminate - this routine tears down and deallocates a remote port.
1552 * @rport: The remote port to be terminated
1553 *
1554 * Notes:
1555 * This routine assumes no locks are held on entry.
1556 */
1557 static void
1558 fc_rport_terminate(struct fc_rport *rport)
1559 {
1560 struct Scsi_Host *shost = rport_to_shost(rport);
1561 struct device *dev = &rport->dev;
1562 unsigned long flags;
1563
1564 fc_rport_tgt_remove(rport);
1565
1566 transport_remove_device(dev);
1567 device_del(dev);
1568 transport_destroy_device(dev);
1569 spin_lock_irqsave(shost->host_lock, flags);
1570 list_del(&rport->peers);
1571 spin_unlock_irqrestore(shost->host_lock, flags);
1572 put_device(&shost->shost_gendev);
1573 }
1574
1575 /**
1576 * fc_remote_port_delete - notifies the fc transport that a remote
1577 * port is no longer in existence.
1578 * @rport: The remote port that no longer exists
1579 *
1580 * The LLDD calls this routine to notify the transport that a remote
1581 * port is no longer part of the topology. Note: Although a port
1582 * may no longer be part of the topology, it may persist in the remote
1583 * ports displayed by the fc_host. We do this under 2 conditions:
1584 * - If the port was a scsi target, we delay its deletion by "blocking" it.
1585 * This allows the port to temporarily disappear, then reappear without
1586 * disrupting the SCSI device tree attached to it. During the "blocked"
1587 * period the port will still exist.
1588 * - If the port was a scsi target and disappears for longer than we
1589 * expect, we'll delete the port and the tear down the SCSI device tree
1590 * attached to it. However, we want to semi-persist the target id assigned
1591 * to that port if it eventually does exist. The port structure will
1592 * remain (although with minimal information) so that the target id
1593 * bindings remails.
1594 *
1595 * If the remote port is not an FCP Target, it will be fully torn down
1596 * and deallocated, including the fc_remote_port class device.
1597 *
1598 * If the remote port is an FCP Target, the port will be placed in a
1599 * temporary blocked state. From the LLDD's perspective, the rport no
1600 * longer exists. From the SCSI midlayer's perspective, the SCSI target
1601 * exists, but all sdevs on it are blocked from further I/O. The following
1602 * is then expected:
1603 * If the remote port does not return (signaled by a LLDD call to
1604 * fc_remote_port_add()) within the dev_loss_tmo timeout, then the
1605 * scsi target is removed - killing all outstanding i/o and removing the
1606 * scsi devices attached ot it. The port structure will be marked Not
1607 * Present and be partially cleared, leaving only enough information to
1608 * recognize the remote port relative to the scsi target id binding if
1609 * it later appears. The port will remain as long as there is a valid
1610 * binding (e.g. until the user changes the binding type or unloads the
1611 * scsi host with the binding).
1612 *
1613 * If the remote port returns within the dev_loss_tmo value (and matches
1614 * according to the target id binding type), the port structure will be
1615 * reused. If it is no longer a SCSI target, the target will be torn
1616 * down. If it continues to be a SCSI target, then the target will be
1617 * unblocked (allowing i/o to be resumed), and a scan will be activated
1618 * to ensure that all luns are detected.
1619 *
1620 * Called from normal process context only - cannot be called from interrupt.
1621 *
1622 * Notes:
1623 * This routine assumes no locks are held on entry.
1624 **/
1625 void
1626 fc_remote_port_delete(struct fc_rport *rport)
1627 {
1628 int timeout = rport->dev_loss_tmo;
1629
1630 /* If no scsi target id mapping, delete it */
1631 if (rport->scsi_target_id == -1) {
1632 fc_rport_terminate(rport);
1633 return;
1634 }
1635
1636 scsi_target_block(&rport->dev);
1637
1638 /* cap the length the devices can be blocked until they are deleted */
1639 schedule_delayed_work(&rport->dev_loss_work, timeout * HZ);
1640
1641 rport->port_state = FC_PORTSTATE_BLOCKED;
1642 }
1643 EXPORT_SYMBOL(fc_remote_port_delete);
1644
1645 /**
1646 * fc_remote_port_rolechg - notifies the fc transport that the roles
1647 * on a remote may have changed.
1648 * @rport: The remote port that changed.
1649 *
1650 * The LLDD calls this routine to notify the transport that the roles
1651 * on a remote port may have changed. The largest effect of this is
1652 * if a port now becomes a FCP Target, it must be allocated a
1653 * scsi target id. If the port is no longer a FCP target, any
1654 * scsi target id value assigned to it will persist in case the
1655 * role changes back to include FCP Target. No changes in the scsi
1656 * midlayer will be invoked if the role changes (in the expectation
1657 * that the role will be resumed. If it doesn't normal error processing
1658 * will take place).
1659 *
1660 * Should not be called from interrupt context.
1661 *
1662 * Notes:
1663 * This routine assumes no locks are held on entry.
1664 **/
1665 void
1666 fc_remote_port_rolechg(struct fc_rport *rport, u32 roles)
1667 {
1668 struct Scsi_Host *shost = rport_to_shost(rport);
1669 struct fc_host_attrs *fc_host =
1670 (struct fc_host_attrs *)shost->shost_data;
1671 unsigned long flags;
1672 int create = 0;
1673
1674 spin_lock_irqsave(shost->host_lock, flags);
1675 if (roles & FC_RPORT_ROLE_FCP_TARGET) {
1676 if (rport->scsi_target_id == -1) {
1677 rport->scsi_target_id = fc_host->next_target_id++;
1678 create = 1;
1679 } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET))
1680 create = 1;
1681 }
1682 spin_unlock_irqrestore(shost->host_lock, flags);
1683
1684 rport->roles = roles;
1685
1686 if (create) {
1687 /*
1688 * There may have been a delete timer running on the
1689 * port. Ensure that it is cancelled as we now know
1690 * the port is an FCP Target.
1691 * Note: we know the rport is exists and in an online
1692 * state as the LLDD would not have had an rport
1693 * reference to pass us.
1694 *
1695 * Take no action on the del_timer failure as the state
1696 * machine state change will validate the
1697 * transaction.
1698 */
1699 if (!cancel_delayed_work(&rport->dev_loss_work))
1700 flush_scheduled_work();
1701
1702 /* initiate a scan of the target */
1703 scsi_queue_work(shost, &rport->scan_work);
1704 }
1705 }
1706 EXPORT_SYMBOL(fc_remote_port_rolechg);
1707
1708 /**
1709 * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that
1710 * was a SCSI target (thus was blocked), and failed
1711 * to return in the alloted time.
1712 *
1713 * @data: rport target that failed to reappear in the alloted time.
1714 **/
1715 static void
1716 fc_timeout_deleted_rport(void *data)
1717 {
1718 struct fc_rport *rport = (struct fc_rport *)data;
1719 struct Scsi_Host *shost = rport_to_shost(rport);
1720 unsigned long flags;
1721
1722 spin_lock_irqsave(shost->host_lock, flags);
1723
1724 /*
1725 * If the port is ONLINE, then it came back, but was no longer an
1726 * FCP target. Thus we need to tear down the scsi_target on it.
1727 */
1728 if (rport->port_state == FC_PORTSTATE_ONLINE) {
1729 spin_unlock_irqrestore(shost->host_lock, flags);
1730
1731 dev_printk(KERN_ERR, &rport->dev,
1732 "blocked FC remote port time out: removing target\n");
1733
1734 fc_rport_tgt_remove(rport);
1735
1736 return;
1737 }
1738
1739 if (rport->port_state != FC_PORTSTATE_BLOCKED) {
1740 spin_unlock_irqrestore(shost->host_lock, flags);
1741 dev_printk(KERN_ERR, &rport->dev,
1742 "blocked FC remote port time out: leaving target alone\n");
1743 return;
1744 }
1745
1746 if (fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE) {
1747 spin_unlock_irqrestore(shost->host_lock, flags);
1748 dev_printk(KERN_ERR, &rport->dev,
1749 "blocked FC remote port time out: removing target\n");
1750 fc_rport_terminate(rport);
1751 return;
1752 }
1753
1754 dev_printk(KERN_ERR, &rport->dev,
1755 "blocked FC remote port time out: removing target and "
1756 "saving binding\n");
1757
1758 list_move_tail(&rport->peers, &fc_host_rport_bindings(shost));
1759
1760 /*
1761 * Note: We do not remove or clear the hostdata area. This allows
1762 * host-specific target data to persist along with the
1763 * scsi_target_id. It's up to the host to manage it's hostdata area.
1764 */
1765
1766 /*
1767 * Reinitialize port attributes that may change if the port comes back.
1768 */
1769 rport->maxframe_size = -1;
1770 rport->supported_classes = FC_COS_UNSPECIFIED;
1771 rport->roles = FC_RPORT_ROLE_UNKNOWN;
1772 rport->port_state = FC_PORTSTATE_NOTPRESENT;
1773
1774 /* remove the identifiers that aren't used in the consisting binding */
1775 switch (fc_host_tgtid_bind_type(shost)) {
1776 case FC_TGTID_BIND_BY_WWPN:
1777 rport->node_name = -1;
1778 rport->port_id = -1;
1779 break;
1780 case FC_TGTID_BIND_BY_WWNN:
1781 rport->port_name = -1;
1782 rport->port_id = -1;
1783 break;
1784 case FC_TGTID_BIND_BY_ID:
1785 rport->node_name = -1;
1786 rport->port_name = -1;
1787 break;
1788 case FC_TGTID_BIND_NONE: /* to keep compiler happy */
1789 break;
1790 }
1791
1792 spin_unlock_irqrestore(shost->host_lock, flags);
1793
1794 /*
1795 * As this only occurs if the remote port (scsi target)
1796 * went away and didn't come back - we'll remove
1797 * all attached scsi devices.
1798 */
1799 fc_rport_tgt_remove(rport);
1800 }
1801
1802 /**
1803 * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
1804 *
1805 * Will unblock the target (in case it went away and has now come back),
1806 * then invoke a scan.
1807 *
1808 * @data: remote port to be scanned.
1809 **/
1810 static void
1811 fc_scsi_scan_rport(void *data)
1812 {
1813 struct fc_rport *rport = (struct fc_rport *)data;
1814
1815 scsi_target_unblock(&rport->dev);
1816 scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id,
1817 SCAN_WILD_CARD, 1);
1818 }
1819
1820
1821 MODULE_AUTHOR("Martin Hicks");
1822 MODULE_DESCRIPTION("FC Transport Attributes");
1823 MODULE_LICENSE("GPL");
1824
1825 module_init(fc_transport_init);
1826 module_exit(fc_transport_exit);
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