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1da177e4 LT |
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> | |
4e57b681 | 29 | #include <linux/sched.h> /* workqueue stuff, HZ */ |
1da177e4 LT |
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> | |
c829c394 | 34 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
35 | #include "scsi_priv.h" |
36 | ||
aedf3497 JS |
37 | static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
38 | ||
1da177e4 LT |
39 | /* |
40 | * Redefine so that we can have same named attributes in the | |
41 | * sdev/starget/host objects. | |
42 | */ | |
43 | #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
44 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
45 | __ATTR(_name,_mode,_show,_store) | |
46 | ||
47 | #define fc_enum_name_search(title, table_type, table) \ | |
48 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
49 | { \ | |
50 | int i; \ | |
51 | char *name = NULL; \ | |
52 | \ | |
53 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
54 | if (table[i].value == table_key) { \ | |
55 | name = table[i].name; \ | |
56 | break; \ | |
57 | } \ | |
58 | } \ | |
59 | return name; \ | |
60 | } | |
61 | ||
62 | #define fc_enum_name_match(title, table_type, table) \ | |
63 | static int get_fc_##title##_match(const char *table_key, \ | |
64 | enum table_type *value) \ | |
65 | { \ | |
66 | int i; \ | |
67 | \ | |
68 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
69 | if (strncmp(table_key, table[i].name, \ | |
70 | table[i].matchlen) == 0) { \ | |
71 | *value = table[i].value; \ | |
72 | return 0; /* success */ \ | |
73 | } \ | |
74 | } \ | |
75 | return 1; /* failure */ \ | |
76 | } | |
77 | ||
78 | ||
79 | /* Convert fc_port_type values to ascii string name */ | |
80 | static struct { | |
81 | enum fc_port_type value; | |
82 | char *name; | |
83 | } fc_port_type_names[] = { | |
84 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
85 | { FC_PORTTYPE_OTHER, "Other" }, | |
86 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
87 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
88 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
89 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
90 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" }, | |
91 | }; | |
92 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
93 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
94 | ||
95 | ||
96 | /* Convert fc_port_state values to ascii string name */ | |
97 | static struct { | |
98 | enum fc_port_state value; | |
99 | char *name; | |
100 | } fc_port_state_names[] = { | |
101 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
102 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
103 | { FC_PORTSTATE_ONLINE, "Online" }, | |
104 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
105 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
106 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
107 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
108 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
109 | { FC_PORTSTATE_ERROR, "Error" }, | |
110 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
42e33148 | 111 | { FC_PORTSTATE_DELETED, "Deleted" }, |
1da177e4 LT |
112 | }; |
113 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
114 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
115 | ||
116 | ||
117 | /* Convert fc_tgtid_binding_type values to ascii string name */ | |
0ad78200 | 118 | static const struct { |
1da177e4 LT |
119 | enum fc_tgtid_binding_type value; |
120 | char *name; | |
121 | int matchlen; | |
122 | } fc_tgtid_binding_type_names[] = { | |
123 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
124 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
125 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
126 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
127 | }; | |
128 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
129 | fc_tgtid_binding_type_names) | |
130 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
131 | fc_tgtid_binding_type_names) | |
132 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
133 | ||
134 | ||
135 | #define fc_bitfield_name_search(title, table) \ | |
136 | static ssize_t \ | |
137 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
138 | { \ | |
139 | char *prefix = ""; \ | |
140 | ssize_t len = 0; \ | |
141 | int i; \ | |
142 | \ | |
143 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
144 | if (table[i].value & table_key) { \ | |
145 | len += sprintf(buf + len, "%s%s", \ | |
146 | prefix, table[i].name); \ | |
147 | prefix = ", "; \ | |
148 | } \ | |
149 | } \ | |
150 | len += sprintf(buf + len, "\n"); \ | |
151 | return len; \ | |
152 | } | |
153 | ||
154 | ||
155 | /* Convert FC_COS bit values to ascii string name */ | |
0ad78200 | 156 | static const struct { |
1da177e4 LT |
157 | u32 value; |
158 | char *name; | |
159 | } fc_cos_names[] = { | |
160 | { FC_COS_CLASS1, "Class 1" }, | |
161 | { FC_COS_CLASS2, "Class 2" }, | |
162 | { FC_COS_CLASS3, "Class 3" }, | |
163 | { FC_COS_CLASS4, "Class 4" }, | |
164 | { FC_COS_CLASS6, "Class 6" }, | |
165 | }; | |
166 | fc_bitfield_name_search(cos, fc_cos_names) | |
167 | ||
168 | ||
169 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
0ad78200 | 170 | static const struct { |
1da177e4 LT |
171 | u32 value; |
172 | char *name; | |
173 | } fc_port_speed_names[] = { | |
174 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
175 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
176 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
177 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
178 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, | |
179 | }; | |
180 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
181 | ||
182 | ||
183 | static int | |
184 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
185 | { | |
186 | int i, len=0; | |
187 | ||
188 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
189 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
190 | len += sprintf(buf + len, "\n"); | |
191 | return len; | |
192 | } | |
193 | ||
194 | ||
195 | /* Convert FC_RPORT_ROLE bit values to ascii string name */ | |
0ad78200 | 196 | static const struct { |
1da177e4 LT |
197 | u32 value; |
198 | char *name; | |
199 | } fc_remote_port_role_names[] = { | |
200 | { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" }, | |
201 | { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
202 | { FC_RPORT_ROLE_IP_PORT, "IP Port" }, | |
203 | }; | |
204 | fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names) | |
205 | ||
206 | /* | |
207 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
208 | */ | |
209 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
210 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
211 | #define FC_FPORT_PORTID 0x00000e | |
212 | #define FC_FABCTLR_PORTID 0x00000d | |
213 | #define FC_DIRSRVR_PORTID 0x00000c | |
214 | #define FC_TIMESRVR_PORTID 0x00000b | |
215 | #define FC_MGMTSRVR_PORTID 0x00000a | |
216 | ||
217 | ||
19a7b4ae | 218 | static void fc_timeout_deleted_rport(void *data); |
1da177e4 | 219 | static void fc_scsi_scan_rport(void *data); |
1da177e4 LT |
220 | |
221 | /* | |
222 | * Attribute counts pre object type... | |
223 | * Increase these values if you add attributes | |
224 | */ | |
225 | #define FC_STARGET_NUM_ATTRS 3 | |
226 | #define FC_RPORT_NUM_ATTRS 9 | |
ad139a2f | 227 | #define FC_HOST_NUM_ATTRS 17 |
1da177e4 LT |
228 | |
229 | struct fc_internal { | |
230 | struct scsi_transport_template t; | |
231 | struct fc_function_template *f; | |
232 | ||
233 | /* | |
234 | * For attributes : each object has : | |
235 | * An array of the actual attributes structures | |
236 | * An array of null-terminated pointers to the attribute | |
237 | * structures - used for mid-layer interaction. | |
238 | * | |
239 | * The attribute containers for the starget and host are are | |
240 | * part of the midlayer. As the remote port is specific to the | |
241 | * fc transport, we must provide the attribute container. | |
242 | */ | |
243 | struct class_device_attribute private_starget_attrs[ | |
244 | FC_STARGET_NUM_ATTRS]; | |
245 | struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; | |
246 | ||
247 | struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; | |
248 | struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
249 | ||
250 | struct transport_container rport_attr_cont; | |
251 | struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; | |
252 | struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
253 | }; | |
254 | ||
255 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
256 | ||
d0a7e574 JB |
257 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
258 | struct class_device *cdev) | |
1da177e4 LT |
259 | { |
260 | struct scsi_target *starget = to_scsi_target(dev); | |
261 | struct fc_rport *rport = starget_to_rport(starget); | |
262 | ||
263 | /* | |
264 | * if parent is remote port, use values from remote port. | |
265 | * Otherwise, this host uses the fc_transport, but not the | |
266 | * remote port interface. As such, initialize to known non-values. | |
267 | */ | |
268 | if (rport) { | |
269 | fc_starget_node_name(starget) = rport->node_name; | |
270 | fc_starget_port_name(starget) = rport->port_name; | |
271 | fc_starget_port_id(starget) = rport->port_id; | |
272 | } else { | |
273 | fc_starget_node_name(starget) = -1; | |
274 | fc_starget_port_name(starget) = -1; | |
275 | fc_starget_port_id(starget) = -1; | |
276 | } | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
282 | "fc_transport", | |
283 | fc_target_setup, | |
284 | NULL, | |
285 | NULL); | |
286 | ||
d0a7e574 JB |
287 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
288 | struct class_device *cdev) | |
1da177e4 LT |
289 | { |
290 | struct Scsi_Host *shost = dev_to_shost(dev); | |
aedf3497 | 291 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
292 | |
293 | /* | |
294 | * Set default values easily detected by the midlayer as | |
295 | * failure cases. The scsi lldd is responsible for initializing | |
296 | * all transport attributes to valid values per host. | |
297 | */ | |
aedf3497 JS |
298 | fc_host->node_name = -1; |
299 | fc_host->port_name = -1; | |
300 | fc_host->permanent_port_name = -1; | |
301 | fc_host->supported_classes = FC_COS_UNSPECIFIED; | |
302 | memset(fc_host->supported_fc4s, 0, | |
303 | sizeof(fc_host->supported_fc4s)); | |
304 | memset(fc_host->symbolic_name, 0, | |
305 | sizeof(fc_host->symbolic_name)); | |
306 | fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; | |
307 | fc_host->maxframe_size = -1; | |
308 | memset(fc_host->serial_number, 0, | |
309 | sizeof(fc_host->serial_number)); | |
310 | ||
311 | fc_host->port_id = -1; | |
312 | fc_host->port_type = FC_PORTTYPE_UNKNOWN; | |
313 | fc_host->port_state = FC_PORTSTATE_UNKNOWN; | |
314 | memset(fc_host->active_fc4s, 0, | |
315 | sizeof(fc_host->active_fc4s)); | |
316 | fc_host->speed = FC_PORTSPEED_UNKNOWN; | |
317 | fc_host->fabric_name = -1; | |
318 | ||
319 | fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; | |
320 | ||
321 | INIT_LIST_HEAD(&fc_host->rports); | |
322 | INIT_LIST_HEAD(&fc_host->rport_bindings); | |
323 | fc_host->next_rport_number = 0; | |
324 | fc_host->next_target_id = 0; | |
325 | ||
326 | snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d", | |
327 | shost->host_no); | |
328 | fc_host->work_q = create_singlethread_workqueue( | |
329 | fc_host->work_q_name); | |
330 | if (!fc_host->work_q) | |
331 | return -ENOMEM; | |
332 | ||
333 | snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d", | |
334 | shost->host_no); | |
335 | fc_host->devloss_work_q = create_singlethread_workqueue( | |
336 | fc_host->devloss_work_q_name); | |
337 | if (!fc_host->devloss_work_q) { | |
338 | destroy_workqueue(fc_host->work_q); | |
339 | fc_host->work_q = NULL; | |
340 | return -ENOMEM; | |
341 | } | |
342 | ||
1da177e4 LT |
343 | return 0; |
344 | } | |
345 | ||
346 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
347 | "fc_host", | |
348 | fc_host_setup, | |
349 | NULL, | |
350 | NULL); | |
351 | ||
352 | /* | |
353 | * Setup and Remove actions for remote ports are handled | |
354 | * in the service functions below. | |
355 | */ | |
356 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
357 | "fc_remote_ports", | |
358 | NULL, | |
359 | NULL, | |
360 | NULL); | |
361 | ||
362 | /* | |
363 | * Module Parameters | |
364 | */ | |
365 | ||
366 | /* | |
367 | * dev_loss_tmo: the default number of seconds that the FC transport | |
368 | * should insulate the loss of a remote port. | |
369 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
370 | */ | |
371 | static unsigned int fc_dev_loss_tmo = SCSI_DEVICE_BLOCK_MAX_TIMEOUT; | |
372 | ||
373 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR); | |
374 | MODULE_PARM_DESC(dev_loss_tmo, | |
375 | "Maximum number of seconds that the FC transport should" | |
376 | " insulate the loss of a remote port. Once this value is" | |
377 | " exceeded, the scsi target is removed. Value should be" | |
378 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); | |
379 | ||
380 | ||
381 | static __init int fc_transport_init(void) | |
382 | { | |
383 | int error = transport_class_register(&fc_host_class); | |
384 | if (error) | |
385 | return error; | |
386 | error = transport_class_register(&fc_rport_class); | |
387 | if (error) | |
388 | return error; | |
389 | return transport_class_register(&fc_transport_class); | |
390 | } | |
391 | ||
392 | static void __exit fc_transport_exit(void) | |
393 | { | |
394 | transport_class_unregister(&fc_transport_class); | |
395 | transport_class_unregister(&fc_rport_class); | |
396 | transport_class_unregister(&fc_host_class); | |
397 | } | |
398 | ||
399 | /* | |
400 | * FC Remote Port Attribute Management | |
401 | */ | |
402 | ||
403 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
404 | static ssize_t \ | |
405 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
406 | { \ | |
407 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
408 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
409 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
410 | if ((i->f->get_rport_##field) && \ |
411 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 412 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 413 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
414 | i->f->get_rport_##field(rport); \ |
415 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
416 | } | |
417 | ||
418 | #define fc_rport_store_function(field) \ | |
419 | static ssize_t \ | |
420 | store_fc_rport_##field(struct class_device *cdev, const char *buf, \ | |
421 | size_t count) \ | |
422 | { \ | |
423 | int val; \ | |
424 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
425 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
426 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae | 427 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
42e33148 | 428 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae JSEC |
429 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
430 | return -EBUSY; \ | |
1da177e4 LT |
431 | val = simple_strtoul(buf, NULL, 0); \ |
432 | i->f->set_rport_##field(rport, val); \ | |
433 | return count; \ | |
434 | } | |
435 | ||
436 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
437 | fc_rport_show_function(field, format_string, sz, ) \ | |
438 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
439 | show_fc_rport_##field, NULL) | |
440 | ||
441 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
442 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
443 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
444 | show_fc_rport_##field, NULL) | |
445 | ||
446 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
447 | fc_rport_show_function(field, format_string, sz, ) \ | |
448 | fc_rport_store_function(field) \ | |
449 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ | |
450 | show_fc_rport_##field, \ | |
451 | store_fc_rport_##field) | |
452 | ||
453 | ||
454 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
455 | static ssize_t \ | |
456 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
457 | { \ | |
458 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
459 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
460 | } | |
461 | ||
462 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
463 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
464 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
465 | show_fc_rport_##field, NULL) | |
466 | ||
467 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
468 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
469 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
470 | show_fc_rport_##field, NULL) | |
471 | ||
472 | ||
473 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
474 | static ssize_t \ | |
475 | show_fc_rport_##title (struct class_device *cdev, char *buf) \ | |
476 | { \ | |
477 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
478 | const char *name; \ | |
479 | name = get_fc_##title##_name(rport->title); \ | |
480 | if (!name) \ | |
481 | return -EINVAL; \ | |
482 | return snprintf(buf, maxlen, "%s\n", name); \ | |
483 | } \ | |
484 | static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \ | |
485 | show_fc_rport_##title, NULL) | |
486 | ||
487 | ||
488 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
489 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
490 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
491 | i->private_rport_attrs[count].store = NULL; \ | |
492 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
493 | if (i->f->show_rport_##field) \ | |
494 | count++ | |
495 | ||
496 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
497 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
498 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
499 | i->private_rport_attrs[count].store = NULL; \ | |
500 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
501 | count++ | |
502 | ||
503 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
504 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
505 | if (!i->f->set_rport_##field) { \ | |
506 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
507 | i->private_rport_attrs[count].store = NULL; \ | |
508 | } \ | |
509 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
510 | if (i->f->show_rport_##field) \ | |
511 | count++ | |
512 | ||
513 | ||
514 | /* The FC Transport Remote Port Attributes: */ | |
515 | ||
516 | /* Fixed Remote Port Attributes */ | |
517 | ||
518 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
519 | ||
520 | static ssize_t | |
521 | show_fc_rport_supported_classes (struct class_device *cdev, char *buf) | |
522 | { | |
523 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
524 | if (rport->supported_classes == FC_COS_UNSPECIFIED) | |
525 | return snprintf(buf, 20, "unspecified\n"); | |
526 | return get_fc_cos_names(rport->supported_classes, buf); | |
527 | } | |
528 | static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO, | |
529 | show_fc_rport_supported_classes, NULL); | |
530 | ||
531 | /* Dynamic Remote Port Attributes */ | |
532 | ||
19a7b4ae JSEC |
533 | /* |
534 | * dev_loss_tmo attribute | |
535 | */ | |
536 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
537 | static ssize_t | |
538 | store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf, | |
539 | size_t count) | |
540 | { | |
541 | int val; | |
542 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
543 | struct Scsi_Host *shost = rport_to_shost(rport); | |
544 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
545 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
42e33148 | 546 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
547 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
548 | return -EBUSY; | |
549 | val = simple_strtoul(buf, NULL, 0); | |
550 | if ((val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
551 | return -EINVAL; | |
552 | i->f->set_rport_dev_loss_tmo(rport, val); | |
553 | return count; | |
554 | } | |
555 | static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, | |
556 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); | |
1da177e4 LT |
557 | |
558 | ||
559 | /* Private Remote Port Attributes */ | |
560 | ||
561 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
562 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
563 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
564 | ||
565 | static ssize_t | |
566 | show_fc_rport_roles (struct class_device *cdev, char *buf) | |
567 | { | |
568 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
569 | ||
570 | /* identify any roles that are port_id specific */ | |
571 | if ((rport->port_id != -1) && | |
572 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
573 | FC_WELLKNOWN_PORTID_MASK) { | |
574 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
575 | case FC_FPORT_PORTID: | |
576 | return snprintf(buf, 30, "Fabric Port\n"); | |
577 | case FC_FABCTLR_PORTID: | |
578 | return snprintf(buf, 30, "Fabric Controller\n"); | |
579 | case FC_DIRSRVR_PORTID: | |
580 | return snprintf(buf, 30, "Directory Server\n"); | |
581 | case FC_TIMESRVR_PORTID: | |
582 | return snprintf(buf, 30, "Time Server\n"); | |
583 | case FC_MGMTSRVR_PORTID: | |
584 | return snprintf(buf, 30, "Management Server\n"); | |
585 | default: | |
586 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
587 | } | |
588 | } else { | |
589 | if (rport->roles == FC_RPORT_ROLE_UNKNOWN) | |
590 | return snprintf(buf, 20, "unknown\n"); | |
591 | return get_fc_remote_port_roles_names(rport->roles, buf); | |
592 | } | |
593 | } | |
594 | static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO, | |
595 | show_fc_rport_roles, NULL); | |
596 | ||
597 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
598 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
599 | ||
600 | ||
601 | ||
602 | /* | |
603 | * FC SCSI Target Attribute Management | |
604 | */ | |
605 | ||
606 | /* | |
607 | * Note: in the target show function we recognize when the remote | |
608 | * port is in the heirarchy and do not allow the driver to get | |
609 | * involved in sysfs functions. The driver only gets involved if | |
610 | * it's the "old" style that doesn't use rports. | |
611 | */ | |
612 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
613 | static ssize_t \ | |
614 | show_fc_starget_##field (struct class_device *cdev, char *buf) \ | |
615 | { \ | |
616 | struct scsi_target *starget = transport_class_to_starget(cdev); \ | |
617 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ | |
618 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
619 | struct fc_rport *rport = starget_to_rport(starget); \ | |
620 | if (rport) \ | |
621 | fc_starget_##field(starget) = rport->field; \ | |
622 | else if (i->f->get_starget_##field) \ | |
623 | i->f->get_starget_##field(starget); \ | |
624 | return snprintf(buf, sz, format_string, \ | |
625 | cast fc_starget_##field(starget)); \ | |
626 | } | |
627 | ||
628 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
629 | fc_starget_show_function(field, format_string, sz, ) \ | |
630 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
631 | show_fc_starget_##field, NULL) | |
632 | ||
633 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
634 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
635 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
636 | show_fc_starget_##field, NULL) | |
637 | ||
638 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
639 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
640 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
641 | i->private_starget_attrs[count].store = NULL; \ | |
642 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
643 | if (i->f->show_starget_##field) \ | |
644 | count++ | |
645 | ||
646 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
647 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
648 | if (!i->f->set_starget_##field) { \ | |
649 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
650 | i->private_starget_attrs[count].store = NULL; \ | |
651 | } \ | |
652 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
653 | if (i->f->show_starget_##field) \ | |
654 | count++ | |
655 | ||
656 | /* The FC Transport SCSI Target Attributes: */ | |
657 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
658 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
659 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
660 | ||
661 | ||
662 | /* | |
663 | * Host Attribute Management | |
664 | */ | |
665 | ||
666 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
667 | static ssize_t \ | |
668 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
669 | { \ | |
670 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
671 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
672 | if (i->f->get_host_##field) \ | |
673 | i->f->get_host_##field(shost); \ | |
674 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
675 | } | |
676 | ||
677 | #define fc_host_store_function(field) \ | |
678 | static ssize_t \ | |
679 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
680 | size_t count) \ | |
681 | { \ | |
682 | int val; \ | |
683 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
684 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
685 | \ | |
686 | val = simple_strtoul(buf, NULL, 0); \ | |
687 | i->f->set_host_##field(shost, val); \ | |
688 | return count; \ | |
689 | } | |
690 | ||
691 | #define fc_host_rd_attr(field, format_string, sz) \ | |
692 | fc_host_show_function(field, format_string, sz, ) \ | |
693 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
694 | show_fc_host_##field, NULL) | |
695 | ||
696 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
697 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
698 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
699 | show_fc_host_##field, NULL) | |
700 | ||
701 | #define fc_host_rw_attr(field, format_string, sz) \ | |
702 | fc_host_show_function(field, format_string, sz, ) \ | |
703 | fc_host_store_function(field) \ | |
704 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ | |
705 | show_fc_host_##field, \ | |
706 | store_fc_host_##field) | |
707 | ||
708 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
709 | static ssize_t \ | |
710 | show_fc_host_##title (struct class_device *cdev, char *buf) \ | |
711 | { \ | |
712 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
713 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
714 | const char *name; \ | |
715 | if (i->f->get_host_##title) \ | |
716 | i->f->get_host_##title(shost); \ | |
717 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
718 | if (!name) \ | |
719 | return -EINVAL; \ | |
720 | return snprintf(buf, maxlen, "%s\n", name); \ | |
721 | } \ | |
722 | static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) | |
723 | ||
724 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
725 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
726 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
727 | i->private_host_attrs[count].store = NULL; \ | |
728 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
729 | if (i->f->show_host_##field) \ | |
730 | count++ | |
731 | ||
732 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ | |
733 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
734 | if (!i->f->set_host_##field) { \ | |
735 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
736 | i->private_host_attrs[count].store = NULL; \ | |
737 | } \ | |
738 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
739 | if (i->f->show_host_##field) \ | |
740 | count++ | |
741 | ||
742 | ||
743 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
744 | static ssize_t \ | |
745 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
746 | { \ | |
747 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
748 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
749 | } | |
750 | ||
751 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
752 | fc_private_host_show_function(field, format_string, sz, ) \ | |
753 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
754 | show_fc_host_##field, NULL) | |
755 | ||
756 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
757 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
758 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
759 | show_fc_host_##field, NULL) | |
760 | ||
761 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
762 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
763 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
764 | i->private_host_attrs[count].store = NULL; \ | |
765 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
766 | count++ | |
767 | ||
768 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 769 | { \ |
1da177e4 LT |
770 | i->private_host_attrs[count] = class_device_attr_host_##field; \ |
771 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
91ca7b01 AV |
772 | count++; \ |
773 | } | |
1da177e4 LT |
774 | |
775 | ||
776 | /* Fixed Host Attributes */ | |
777 | ||
778 | static ssize_t | |
779 | show_fc_host_supported_classes (struct class_device *cdev, char *buf) | |
780 | { | |
781 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
782 | ||
783 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
784 | return snprintf(buf, 20, "unspecified\n"); | |
785 | ||
786 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
787 | } | |
788 | static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, | |
789 | show_fc_host_supported_classes, NULL); | |
790 | ||
791 | static ssize_t | |
792 | show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) | |
793 | { | |
794 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
795 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); | |
796 | } | |
797 | static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, | |
798 | show_fc_host_supported_fc4s, NULL); | |
799 | ||
800 | static ssize_t | |
801 | show_fc_host_supported_speeds (struct class_device *cdev, char *buf) | |
802 | { | |
803 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
804 | ||
805 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
806 | return snprintf(buf, 20, "unknown\n"); | |
807 | ||
808 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
809 | } | |
810 | static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, | |
811 | show_fc_host_supported_speeds, NULL); | |
812 | ||
813 | ||
814 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
815 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
6b7281d0 AH |
816 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
817 | unsigned long long); | |
1da177e4 LT |
818 | fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1)); |
819 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); | |
820 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); | |
821 | ||
822 | ||
823 | /* Dynamic Host Attributes */ | |
824 | ||
825 | static ssize_t | |
826 | show_fc_host_active_fc4s (struct class_device *cdev, char *buf) | |
827 | { | |
828 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
829 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
830 | ||
831 | if (i->f->get_host_active_fc4s) | |
832 | i->f->get_host_active_fc4s(shost); | |
833 | ||
834 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
835 | } | |
836 | static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, | |
837 | show_fc_host_active_fc4s, NULL); | |
838 | ||
839 | static ssize_t | |
840 | show_fc_host_speed (struct class_device *cdev, char *buf) | |
841 | { | |
842 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
843 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
844 | ||
845 | if (i->f->get_host_speed) | |
846 | i->f->get_host_speed(shost); | |
847 | ||
848 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
849 | return snprintf(buf, 20, "unknown\n"); | |
850 | ||
851 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
852 | } | |
853 | static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, | |
854 | show_fc_host_speed, NULL); | |
855 | ||
856 | ||
857 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
858 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
859 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
860 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
861 | ||
862 | ||
863 | /* Private Host Attributes */ | |
864 | ||
865 | static ssize_t | |
866 | show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) | |
867 | { | |
868 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
869 | const char *name; | |
870 | ||
871 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
872 | if (!name) | |
873 | return -EINVAL; | |
874 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
875 | } | |
876 | ||
d16794f6 JSEC |
877 | #define get_list_head_entry(pos, head, member) \ |
878 | pos = list_entry((head)->next, typeof(*pos), member) | |
879 | ||
1da177e4 LT |
880 | static ssize_t |
881 | store_fc_private_host_tgtid_bind_type(struct class_device *cdev, | |
882 | const char *buf, size_t count) | |
883 | { | |
884 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
d16794f6 | 885 | struct fc_rport *rport; |
1da177e4 LT |
886 | enum fc_tgtid_binding_type val; |
887 | unsigned long flags; | |
888 | ||
889 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
890 | return -EINVAL; | |
891 | ||
892 | /* if changing bind type, purge all unused consistent bindings */ | |
893 | if (val != fc_host_tgtid_bind_type(shost)) { | |
894 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
895 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
896 | get_list_head_entry(rport, | |
897 | &fc_host_rport_bindings(shost), peers); | |
aedf3497 JS |
898 | list_del(&rport->peers); |
899 | rport->port_state = FC_PORTSTATE_DELETED; | |
900 | fc_queue_work(shost, &rport->rport_delete_work); | |
d16794f6 | 901 | } |
1da177e4 LT |
902 | spin_unlock_irqrestore(shost->host_lock, flags); |
903 | } | |
904 | ||
905 | fc_host_tgtid_bind_type(shost) = val; | |
906 | return count; | |
907 | } | |
908 | ||
909 | static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, | |
910 | show_fc_private_host_tgtid_bind_type, | |
911 | store_fc_private_host_tgtid_bind_type); | |
912 | ||
91ca7b01 AV |
913 | static ssize_t |
914 | store_fc_private_host_issue_lip(struct class_device *cdev, | |
915 | const char *buf, size_t count) | |
916 | { | |
917 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
918 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
919 | int ret; | |
920 | ||
921 | /* ignore any data value written to the attribute */ | |
922 | if (i->f->issue_fc_host_lip) { | |
923 | ret = i->f->issue_fc_host_lip(shost); | |
924 | return ret ? ret: count; | |
925 | } | |
926 | ||
927 | return -ENOENT; | |
928 | } | |
929 | ||
930 | static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, | |
931 | store_fc_private_host_issue_lip); | |
932 | ||
1da177e4 LT |
933 | /* |
934 | * Host Statistics Management | |
935 | */ | |
936 | ||
937 | /* Show a given an attribute in the statistics group */ | |
938 | static ssize_t | |
939 | fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) | |
940 | { | |
941 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
942 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
943 | struct fc_host_statistics *stats; | |
944 | ssize_t ret = -ENOENT; | |
945 | ||
946 | if (offset > sizeof(struct fc_host_statistics) || | |
947 | offset % sizeof(u64) != 0) | |
948 | WARN_ON(1); | |
949 | ||
950 | if (i->f->get_fc_host_stats) { | |
951 | stats = (i->f->get_fc_host_stats)(shost); | |
952 | if (stats) | |
953 | ret = snprintf(buf, 20, "0x%llx\n", | |
954 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
955 | } | |
956 | return ret; | |
957 | } | |
958 | ||
959 | ||
960 | /* generate a read-only statistics attribute */ | |
961 | #define fc_host_statistic(name) \ | |
962 | static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ | |
963 | { \ | |
964 | return fc_stat_show(cd, buf, \ | |
965 | offsetof(struct fc_host_statistics, name)); \ | |
966 | } \ | |
967 | static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) | |
968 | ||
969 | fc_host_statistic(seconds_since_last_reset); | |
970 | fc_host_statistic(tx_frames); | |
971 | fc_host_statistic(tx_words); | |
972 | fc_host_statistic(rx_frames); | |
973 | fc_host_statistic(rx_words); | |
974 | fc_host_statistic(lip_count); | |
975 | fc_host_statistic(nos_count); | |
976 | fc_host_statistic(error_frames); | |
977 | fc_host_statistic(dumped_frames); | |
978 | fc_host_statistic(link_failure_count); | |
979 | fc_host_statistic(loss_of_sync_count); | |
980 | fc_host_statistic(loss_of_signal_count); | |
981 | fc_host_statistic(prim_seq_protocol_err_count); | |
982 | fc_host_statistic(invalid_tx_word_count); | |
983 | fc_host_statistic(invalid_crc_count); | |
984 | fc_host_statistic(fcp_input_requests); | |
985 | fc_host_statistic(fcp_output_requests); | |
986 | fc_host_statistic(fcp_control_requests); | |
987 | fc_host_statistic(fcp_input_megabytes); | |
988 | fc_host_statistic(fcp_output_megabytes); | |
989 | ||
990 | static ssize_t | |
991 | fc_reset_statistics(struct class_device *cdev, const char *buf, | |
992 | size_t count) | |
993 | { | |
994 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
995 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
996 | ||
997 | /* ignore any data value written to the attribute */ | |
998 | if (i->f->reset_fc_host_stats) { | |
999 | i->f->reset_fc_host_stats(shost); | |
1000 | return count; | |
1001 | } | |
1002 | ||
1003 | return -ENOENT; | |
1004 | } | |
1005 | static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, | |
1006 | fc_reset_statistics); | |
1007 | ||
1008 | ||
1009 | static struct attribute *fc_statistics_attrs[] = { | |
1010 | &class_device_attr_host_seconds_since_last_reset.attr, | |
1011 | &class_device_attr_host_tx_frames.attr, | |
1012 | &class_device_attr_host_tx_words.attr, | |
1013 | &class_device_attr_host_rx_frames.attr, | |
1014 | &class_device_attr_host_rx_words.attr, | |
1015 | &class_device_attr_host_lip_count.attr, | |
1016 | &class_device_attr_host_nos_count.attr, | |
1017 | &class_device_attr_host_error_frames.attr, | |
1018 | &class_device_attr_host_dumped_frames.attr, | |
1019 | &class_device_attr_host_link_failure_count.attr, | |
1020 | &class_device_attr_host_loss_of_sync_count.attr, | |
1021 | &class_device_attr_host_loss_of_signal_count.attr, | |
1022 | &class_device_attr_host_prim_seq_protocol_err_count.attr, | |
1023 | &class_device_attr_host_invalid_tx_word_count.attr, | |
1024 | &class_device_attr_host_invalid_crc_count.attr, | |
1025 | &class_device_attr_host_fcp_input_requests.attr, | |
1026 | &class_device_attr_host_fcp_output_requests.attr, | |
1027 | &class_device_attr_host_fcp_control_requests.attr, | |
1028 | &class_device_attr_host_fcp_input_megabytes.attr, | |
1029 | &class_device_attr_host_fcp_output_megabytes.attr, | |
1030 | &class_device_attr_host_reset_statistics.attr, | |
1031 | NULL | |
1032 | }; | |
1033 | ||
1034 | static struct attribute_group fc_statistics_group = { | |
1035 | .name = "statistics", | |
1036 | .attrs = fc_statistics_attrs, | |
1037 | }; | |
1038 | ||
1039 | static int fc_host_match(struct attribute_container *cont, | |
1040 | struct device *dev) | |
1041 | { | |
1042 | struct Scsi_Host *shost; | |
1043 | struct fc_internal *i; | |
1044 | ||
1045 | if (!scsi_is_host_device(dev)) | |
1046 | return 0; | |
1047 | ||
1048 | shost = dev_to_shost(dev); | |
1049 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1050 | != &fc_host_class.class) | |
1051 | return 0; | |
1052 | ||
1053 | i = to_fc_internal(shost->transportt); | |
1054 | ||
1055 | return &i->t.host_attrs.ac == cont; | |
1056 | } | |
1057 | ||
1058 | static int fc_target_match(struct attribute_container *cont, | |
1059 | struct device *dev) | |
1060 | { | |
1061 | struct Scsi_Host *shost; | |
1062 | struct fc_internal *i; | |
1063 | ||
1064 | if (!scsi_is_target_device(dev)) | |
1065 | return 0; | |
1066 | ||
1067 | shost = dev_to_shost(dev->parent); | |
1068 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1069 | != &fc_host_class.class) | |
1070 | return 0; | |
1071 | ||
1072 | i = to_fc_internal(shost->transportt); | |
1073 | ||
1074 | return &i->t.target_attrs.ac == cont; | |
1075 | } | |
1076 | ||
1077 | static void fc_rport_dev_release(struct device *dev) | |
1078 | { | |
1079 | struct fc_rport *rport = dev_to_rport(dev); | |
1080 | put_device(dev->parent); | |
1081 | kfree(rport); | |
1082 | } | |
1083 | ||
1084 | int scsi_is_fc_rport(const struct device *dev) | |
1085 | { | |
1086 | return dev->release == fc_rport_dev_release; | |
1087 | } | |
1088 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1089 | ||
1090 | static int fc_rport_match(struct attribute_container *cont, | |
1091 | struct device *dev) | |
1092 | { | |
1093 | struct Scsi_Host *shost; | |
1094 | struct fc_internal *i; | |
1095 | ||
1096 | if (!scsi_is_fc_rport(dev)) | |
1097 | return 0; | |
1098 | ||
1099 | shost = dev_to_shost(dev->parent); | |
1100 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1101 | != &fc_host_class.class) | |
1102 | return 0; | |
1103 | ||
1104 | i = to_fc_internal(shost->transportt); | |
1105 | ||
1106 | return &i->rport_attr_cont.ac == cont; | |
1107 | } | |
1108 | ||
5c44cd2a | 1109 | |
c829c394 JS |
1110 | /** |
1111 | * fc_timed_out - FC Transport I/O timeout intercept handler | |
1112 | * | |
1113 | * @scmd: The SCSI command which timed out | |
1114 | * | |
1115 | * This routine protects against error handlers getting invoked while a | |
1116 | * rport is in a blocked state, typically due to a temporarily loss of | |
1117 | * connectivity. If the error handlers are allowed to proceed, requests | |
1118 | * to abort i/o, reset the target, etc will likely fail as there is no way | |
1119 | * to communicate with the device to perform the requested function. These | |
1120 | * failures may result in the midlayer taking the device offline, requiring | |
1121 | * manual intervention to restore operation. | |
1122 | * | |
1123 | * This routine, called whenever an i/o times out, validates the state of | |
1124 | * the underlying rport. If the rport is blocked, it returns | |
1125 | * EH_RESET_TIMER, which will continue to reschedule the timeout. | |
1126 | * Eventually, either the device will return, or devloss_tmo will fire, | |
1127 | * and when the timeout then fires, it will be handled normally. | |
1128 | * If the rport is not blocked, normal error handling continues. | |
1129 | * | |
1130 | * Notes: | |
1131 | * This routine assumes no locks are held on entry. | |
1132 | **/ | |
1133 | static enum scsi_eh_timer_return | |
1134 | fc_timed_out(struct scsi_cmnd *scmd) | |
1135 | { | |
1136 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); | |
1137 | ||
1138 | if (rport->port_state == FC_PORTSTATE_BLOCKED) | |
1139 | return EH_RESET_TIMER; | |
1140 | ||
1141 | return EH_NOT_HANDLED; | |
1142 | } | |
1143 | ||
5c44cd2a JSEC |
1144 | /* |
1145 | * Must be called with shost->host_lock held | |
1146 | */ | |
e02f3f59 CH |
1147 | static int fc_user_scan(struct Scsi_Host *shost, uint channel, |
1148 | uint id, uint lun) | |
5c44cd2a JSEC |
1149 | { |
1150 | struct fc_rport *rport; | |
1151 | ||
e02f3f59 CH |
1152 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
1153 | if (rport->scsi_target_id == -1) | |
1154 | continue; | |
5c44cd2a | 1155 | |
e02f3f59 CH |
1156 | if ((channel == SCAN_WILD_CARD || channel == rport->channel) && |
1157 | (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) { | |
1158 | scsi_scan_target(&rport->dev, rport->channel, | |
1159 | rport->scsi_target_id, lun, 1); | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | return 0; | |
5c44cd2a JSEC |
1164 | } |
1165 | ||
1da177e4 LT |
1166 | struct scsi_transport_template * |
1167 | fc_attach_transport(struct fc_function_template *ft) | |
1168 | { | |
1da177e4 | 1169 | int count; |
24669f75 JS |
1170 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
1171 | GFP_KERNEL); | |
1da177e4 LT |
1172 | |
1173 | if (unlikely(!i)) | |
1174 | return NULL; | |
1175 | ||
1da177e4 LT |
1176 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
1177 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
1178 | i->t.target_attrs.ac.match = fc_target_match; | |
1179 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
1180 | transport_container_register(&i->t.target_attrs); | |
1181 | ||
1182 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1183 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
1184 | i->t.host_attrs.ac.match = fc_host_match; | |
1185 | i->t.host_size = sizeof(struct fc_host_attrs); | |
1186 | if (ft->get_fc_host_stats) | |
1187 | i->t.host_attrs.statistics = &fc_statistics_group; | |
1188 | transport_container_register(&i->t.host_attrs); | |
1189 | ||
1190 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
1191 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
1192 | i->rport_attr_cont.ac.match = fc_rport_match; | |
1193 | transport_container_register(&i->rport_attr_cont); | |
1194 | ||
1195 | i->f = ft; | |
1196 | ||
1197 | /* Transport uses the shost workq for scsi scanning */ | |
1198 | i->t.create_work_queue = 1; | |
5c44cd2a | 1199 | |
c829c394 JS |
1200 | i->t.eh_timed_out = fc_timed_out; |
1201 | ||
e02f3f59 | 1202 | i->t.user_scan = fc_user_scan; |
1da177e4 LT |
1203 | |
1204 | /* | |
1205 | * Setup SCSI Target Attributes. | |
1206 | */ | |
1207 | count = 0; | |
1208 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
1209 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
1210 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
1211 | ||
1212 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
1213 | ||
1214 | i->starget_attrs[count] = NULL; | |
1215 | ||
1216 | ||
1217 | /* | |
1218 | * Setup SCSI Host Attributes. | |
1219 | */ | |
1220 | count=0; | |
1221 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
1222 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
6b7281d0 | 1223 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
1da177e4 LT |
1224 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
1225 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1226 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); | |
1227 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); | |
1228 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
1229 | SETUP_HOST_ATTRIBUTE_RD(serial_number); | |
1230 | ||
1231 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
1232 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
1233 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
1234 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
1235 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
1236 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
1237 | ||
1238 | /* Transport-managed attributes */ | |
1239 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); | |
91ca7b01 AV |
1240 | if (ft->issue_fc_host_lip) |
1241 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
1da177e4 LT |
1242 | |
1243 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
1244 | ||
1245 | i->host_attrs[count] = NULL; | |
1246 | ||
1247 | /* | |
1248 | * Setup Remote Port Attributes. | |
1249 | */ | |
1250 | count=0; | |
1251 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
1252 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
1253 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
1254 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
1255 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
1256 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
1257 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
1258 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
1259 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
1260 | ||
1261 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
1262 | ||
1263 | i->rport_attrs[count] = NULL; | |
1264 | ||
1265 | return &i->t; | |
1266 | } | |
1267 | EXPORT_SYMBOL(fc_attach_transport); | |
1268 | ||
1269 | void fc_release_transport(struct scsi_transport_template *t) | |
1270 | { | |
1271 | struct fc_internal *i = to_fc_internal(t); | |
1272 | ||
1273 | transport_container_unregister(&i->t.target_attrs); | |
1274 | transport_container_unregister(&i->t.host_attrs); | |
1275 | transport_container_unregister(&i->rport_attr_cont); | |
1276 | ||
1277 | kfree(i); | |
1278 | } | |
1279 | EXPORT_SYMBOL(fc_release_transport); | |
1280 | ||
aedf3497 JS |
1281 | /** |
1282 | * fc_queue_work - Queue work to the fc_host workqueue. | |
1283 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1284 | * @work: Work to queue for execution. | |
1285 | * | |
1286 | * Return value: | |
1287 | * 0 on success / != 0 for error | |
1288 | **/ | |
1289 | static int | |
1290 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) | |
1291 | { | |
1292 | if (unlikely(!fc_host_work_q(shost))) { | |
1293 | printk(KERN_ERR | |
1294 | "ERROR: FC host '%s' attempted to queue work, " | |
1295 | "when no workqueue created.\n", shost->hostt->name); | |
1296 | dump_stack(); | |
1297 | ||
1298 | return -EINVAL; | |
1299 | } | |
1300 | ||
1301 | return queue_work(fc_host_work_q(shost), work); | |
1302 | } | |
1303 | ||
1304 | /** | |
1305 | * fc_flush_work - Flush a fc_host's workqueue. | |
1306 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1307 | **/ | |
1308 | static void | |
1309 | fc_flush_work(struct Scsi_Host *shost) | |
1310 | { | |
1311 | if (!fc_host_work_q(shost)) { | |
1312 | printk(KERN_ERR | |
1313 | "ERROR: FC host '%s' attempted to flush work, " | |
1314 | "when no workqueue created.\n", shost->hostt->name); | |
1315 | dump_stack(); | |
1316 | return; | |
1317 | } | |
1318 | ||
1319 | flush_workqueue(fc_host_work_q(shost)); | |
1320 | } | |
1321 | ||
1322 | /** | |
1323 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. | |
1324 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1325 | * @work: Work to queue for execution. | |
1326 | * @delay: jiffies to delay the work queuing | |
1327 | * | |
1328 | * Return value: | |
1329 | * 0 on success / != 0 for error | |
1330 | **/ | |
1331 | static int | |
1332 | fc_queue_devloss_work(struct Scsi_Host *shost, struct work_struct *work, | |
1333 | unsigned long delay) | |
1334 | { | |
1335 | if (unlikely(!fc_host_devloss_work_q(shost))) { | |
1336 | printk(KERN_ERR | |
1337 | "ERROR: FC host '%s' attempted to queue work, " | |
1338 | "when no workqueue created.\n", shost->hostt->name); | |
1339 | dump_stack(); | |
1340 | ||
1341 | return -EINVAL; | |
1342 | } | |
1343 | ||
1344 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); | |
1345 | } | |
1346 | ||
1347 | /** | |
1348 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. | |
1349 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1350 | **/ | |
1351 | static void | |
1352 | fc_flush_devloss(struct Scsi_Host *shost) | |
1353 | { | |
1354 | if (!fc_host_devloss_work_q(shost)) { | |
1355 | printk(KERN_ERR | |
1356 | "ERROR: FC host '%s' attempted to flush work, " | |
1357 | "when no workqueue created.\n", shost->hostt->name); | |
1358 | dump_stack(); | |
1359 | return; | |
1360 | } | |
1361 | ||
1362 | flush_workqueue(fc_host_devloss_work_q(shost)); | |
1363 | } | |
1364 | ||
1da177e4 LT |
1365 | |
1366 | /** | |
1367 | * fc_remove_host - called to terminate any fc_transport-related elements | |
1368 | * for a scsi host. | |
1369 | * @rport: remote port to be unblocked. | |
1370 | * | |
1371 | * This routine is expected to be called immediately preceeding the | |
1372 | * a driver's call to scsi_remove_host(). | |
1373 | * | |
1374 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
1375 | * this routine prior to scsi_remote_host(), will leave dangling | |
1376 | * objects in /sys/class/fc_remote_ports. Access to any of these | |
1377 | * objects can result in a system crash !!! | |
1378 | * | |
1379 | * Notes: | |
1380 | * This routine assumes no locks are held on entry. | |
1381 | **/ | |
1382 | void | |
1383 | fc_remove_host(struct Scsi_Host *shost) | |
1384 | { | |
1385 | struct fc_rport *rport, *next_rport; | |
aedf3497 JS |
1386 | struct workqueue_struct *work_q; |
1387 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
1da177e4 LT |
1388 | |
1389 | /* Remove any remote ports */ | |
1390 | list_for_each_entry_safe(rport, next_rport, | |
aedf3497 JS |
1391 | &fc_host->rports, peers) { |
1392 | list_del(&rport->peers); | |
1393 | rport->port_state = FC_PORTSTATE_DELETED; | |
1394 | fc_queue_work(shost, &rport->rport_delete_work); | |
1395 | } | |
1396 | ||
1da177e4 | 1397 | list_for_each_entry_safe(rport, next_rport, |
aedf3497 JS |
1398 | &fc_host->rport_bindings, peers) { |
1399 | list_del(&rport->peers); | |
1400 | rport->port_state = FC_PORTSTATE_DELETED; | |
1401 | fc_queue_work(shost, &rport->rport_delete_work); | |
1402 | } | |
1403 | ||
1404 | /* flush all scan work items */ | |
1405 | scsi_flush_work(shost); | |
1406 | ||
1407 | /* flush all stgt delete, and rport delete work items, then kill it */ | |
1408 | if (fc_host->work_q) { | |
1409 | work_q = fc_host->work_q; | |
1410 | fc_host->work_q = NULL; | |
1411 | destroy_workqueue(work_q); | |
1412 | } | |
1413 | ||
1414 | /* flush all devloss work items, then kill it */ | |
1415 | if (fc_host->devloss_work_q) { | |
1416 | work_q = fc_host->devloss_work_q; | |
1417 | fc_host->devloss_work_q = NULL; | |
1418 | destroy_workqueue(work_q); | |
1419 | } | |
1da177e4 LT |
1420 | } |
1421 | EXPORT_SYMBOL(fc_remove_host); | |
1422 | ||
aedf3497 JS |
1423 | |
1424 | /** | |
1425 | * fc_starget_delete - called to delete the scsi decendents of an rport | |
1426 | * (target and all sdevs) | |
1427 | * | |
1428 | * @data: remote port to be operated on. | |
1429 | **/ | |
19a7b4ae | 1430 | static void |
aedf3497 | 1431 | fc_starget_delete(void *data) |
19a7b4ae | 1432 | { |
aedf3497 | 1433 | struct fc_rport *rport = (struct fc_rport *)data; |
19a7b4ae | 1434 | struct Scsi_Host *shost = rport_to_shost(rport); |
aedf3497 | 1435 | unsigned long flags; |
19a7b4ae JSEC |
1436 | |
1437 | scsi_target_unblock(&rport->dev); | |
1438 | ||
aedf3497 JS |
1439 | spin_lock_irqsave(shost->host_lock, flags); |
1440 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { | |
1441 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1442 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
1443 | fc_flush_devloss(shost); | |
1444 | spin_lock_irqsave(shost->host_lock, flags); | |
1445 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
1446 | } | |
1447 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
1448 | |
1449 | scsi_remove_target(&rport->dev); | |
1450 | } | |
1451 | ||
aedf3497 JS |
1452 | |
1453 | /** | |
1454 | * fc_rport_final_delete - finish rport termination and delete it. | |
1455 | * | |
1456 | * @data: remote port to be deleted. | |
1457 | **/ | |
1458 | static void | |
1459 | fc_rport_final_delete(void *data) | |
1460 | { | |
1461 | struct fc_rport *rport = (struct fc_rport *)data; | |
1462 | struct device *dev = &rport->dev; | |
1463 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1464 | ||
1465 | /* Delete SCSI target and sdevs */ | |
1466 | if (rport->scsi_target_id != -1) | |
1467 | fc_starget_delete(data); | |
1468 | ||
1469 | /* | |
1470 | * if a scan is pending, flush the SCSI Host work_q so that | |
1471 | * that we can reclaim the rport scan work element. | |
1472 | */ | |
1473 | if (rport->flags & FC_RPORT_SCAN_PENDING) | |
1474 | scsi_flush_work(shost); | |
1475 | ||
1476 | transport_remove_device(dev); | |
1477 | device_del(dev); | |
1478 | transport_destroy_device(dev); | |
1479 | put_device(&shost->shost_gendev); | |
1480 | } | |
1481 | ||
1482 | ||
1da177e4 LT |
1483 | /** |
1484 | * fc_rport_create - allocates and creates a remote FC port. | |
1485 | * @shost: scsi host the remote port is connected to. | |
1486 | * @channel: Channel on shost port connected to. | |
1487 | * @ids: The world wide names, fc address, and FC4 port | |
1488 | * roles for the remote port. | |
1489 | * | |
1490 | * Allocates and creates the remoter port structure, including the | |
1491 | * class and sysfs creation. | |
1492 | * | |
1493 | * Notes: | |
1494 | * This routine assumes no locks are held on entry. | |
1495 | **/ | |
1496 | struct fc_rport * | |
1497 | fc_rport_create(struct Scsi_Host *shost, int channel, | |
1498 | struct fc_rport_identifiers *ids) | |
1499 | { | |
aedf3497 | 1500 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
1501 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
1502 | struct fc_rport *rport; | |
1503 | struct device *dev; | |
1504 | unsigned long flags; | |
1505 | int error; | |
1506 | size_t size; | |
1507 | ||
1508 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
24669f75 | 1509 | rport = kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
1510 | if (unlikely(!rport)) { |
1511 | printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); | |
1512 | return NULL; | |
1513 | } | |
1da177e4 LT |
1514 | |
1515 | rport->maxframe_size = -1; | |
1516 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1517 | rport->dev_loss_tmo = fc_dev_loss_tmo; | |
1518 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); | |
1519 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
1520 | rport->port_id = ids->port_id; | |
1521 | rport->roles = ids->roles; | |
1522 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1523 | if (fci->f->dd_fcrport_size) | |
1524 | rport->dd_data = &rport[1]; | |
1525 | rport->channel = channel; | |
1526 | ||
19a7b4ae | 1527 | INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport); |
1da177e4 | 1528 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport); |
aedf3497 JS |
1529 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete, rport); |
1530 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete, rport); | |
1da177e4 LT |
1531 | |
1532 | spin_lock_irqsave(shost->host_lock, flags); | |
1533 | ||
1534 | rport->number = fc_host->next_rport_number++; | |
1535 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1536 | rport->scsi_target_id = fc_host->next_target_id++; | |
1537 | else | |
1538 | rport->scsi_target_id = -1; | |
aedf3497 | 1539 | list_add_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
1540 | get_device(&shost->shost_gendev); |
1541 | ||
1542 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1543 | ||
1544 | dev = &rport->dev; | |
1545 | device_initialize(dev); | |
1546 | dev->parent = get_device(&shost->shost_gendev); | |
1547 | dev->release = fc_rport_dev_release; | |
1548 | sprintf(dev->bus_id, "rport-%d:%d-%d", | |
1549 | shost->host_no, channel, rport->number); | |
1550 | transport_setup_device(dev); | |
1551 | ||
1552 | error = device_add(dev); | |
1553 | if (error) { | |
1554 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
1555 | goto delete_rport; | |
1556 | } | |
1557 | transport_add_device(dev); | |
1558 | transport_configure_device(dev); | |
1559 | ||
aedf3497 | 1560 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) { |
1da177e4 | 1561 | /* initiate a scan of the target */ |
aedf3497 | 1562 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 1563 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 1564 | } |
1da177e4 LT |
1565 | |
1566 | return rport; | |
1567 | ||
1568 | delete_rport: | |
1569 | transport_destroy_device(dev); | |
1570 | put_device(dev->parent); | |
1571 | spin_lock_irqsave(shost->host_lock, flags); | |
1572 | list_del(&rport->peers); | |
1573 | put_device(&shost->shost_gendev); | |
1574 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1575 | put_device(dev->parent); | |
1576 | kfree(rport); | |
1577 | return NULL; | |
1578 | } | |
1579 | ||
1580 | /** | |
1581 | * fc_remote_port_add - notifies the fc transport of the existence | |
1582 | * of a remote FC port. | |
1583 | * @shost: scsi host the remote port is connected to. | |
1584 | * @channel: Channel on shost port connected to. | |
1585 | * @ids: The world wide names, fc address, and FC4 port | |
1586 | * roles for the remote port. | |
1587 | * | |
1588 | * The LLDD calls this routine to notify the transport of the existence | |
1589 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
1590 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
1591 | * active for the port. | |
1592 | * | |
1593 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
1594 | * maintains consistent target id bindings on behalf of the LLDD. | |
1595 | * A consistent target id binding is an assignment of a target id to | |
1596 | * a remote port identifier, which persists while the scsi host is | |
1597 | * attached. The remote port can disappear, then later reappear, and | |
1598 | * it's target id assignment remains the same. This allows for shifts | |
1599 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
1600 | * changes to the scsi subsystem which is based on scsi host number and | |
1601 | * target id values. Bindings are only valid during the attachment of | |
1602 | * the scsi host. If the host detaches, then later re-attaches, target | |
1603 | * id bindings may change. | |
1604 | * | |
1605 | * This routine is responsible for returning a remote port structure. | |
1606 | * The routine will search the list of remote ports it maintains | |
1607 | * internally on behalf of consistent target id mappings. If found, the | |
1608 | * remote port structure will be reused. Otherwise, a new remote port | |
1609 | * structure will be allocated. | |
1610 | * | |
1611 | * Whenever a remote port is allocated, a new fc_remote_port class | |
1612 | * device is created. | |
1613 | * | |
1614 | * Should not be called from interrupt context. | |
1615 | * | |
1616 | * Notes: | |
1617 | * This routine assumes no locks are held on entry. | |
1618 | **/ | |
1619 | struct fc_rport * | |
1620 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
1621 | struct fc_rport_identifiers *ids) | |
1622 | { | |
19a7b4ae | 1623 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
aedf3497 | 1624 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
1625 | struct fc_rport *rport; |
1626 | unsigned long flags; | |
1627 | int match = 0; | |
1628 | ||
aedf3497 JS |
1629 | /* ensure any stgt delete functions are done */ |
1630 | fc_flush_work(shost); | |
1631 | ||
19a7b4ae JSEC |
1632 | /* |
1633 | * Search the list of "active" rports, for an rport that has been | |
1634 | * deleted, but we've held off the real delete while the target | |
1635 | * is in a "blocked" state. | |
1636 | */ | |
1637 | spin_lock_irqsave(shost->host_lock, flags); | |
1638 | ||
aedf3497 | 1639 | list_for_each_entry(rport, &fc_host->rports, peers) { |
19a7b4ae JSEC |
1640 | |
1641 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
1642 | (rport->channel == channel)) { | |
1643 | ||
aedf3497 | 1644 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
1645 | case FC_TGTID_BIND_BY_WWPN: |
1646 | case FC_TGTID_BIND_NONE: | |
1647 | if (rport->port_name == ids->port_name) | |
1648 | match = 1; | |
1649 | break; | |
1650 | case FC_TGTID_BIND_BY_WWNN: | |
1651 | if (rport->node_name == ids->node_name) | |
1652 | match = 1; | |
1653 | break; | |
1654 | case FC_TGTID_BIND_BY_ID: | |
1655 | if (rport->port_id == ids->port_id) | |
1656 | match = 1; | |
1657 | break; | |
1658 | } | |
1659 | ||
1660 | if (match) { | |
1661 | struct work_struct *work = | |
1662 | &rport->dev_loss_work; | |
1663 | ||
1664 | memcpy(&rport->node_name, &ids->node_name, | |
1665 | sizeof(rport->node_name)); | |
1666 | memcpy(&rport->port_name, &ids->port_name, | |
1667 | sizeof(rport->port_name)); | |
1668 | rport->port_id = ids->port_id; | |
1669 | ||
1670 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1671 | rport->roles = ids->roles; | |
1672 | ||
1673 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1674 | ||
1675 | if (fci->f->dd_fcrport_size) | |
1676 | memset(rport->dd_data, 0, | |
1677 | fci->f->dd_fcrport_size); | |
1678 | ||
1679 | /* | |
1680 | * If we were blocked, we were a target. | |
1681 | * If no longer a target, we leave the timer | |
1682 | * running in case the port changes roles | |
1683 | * prior to the timer expiring. If the timer | |
1684 | * fires, the target will be torn down. | |
1685 | */ | |
1686 | if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET)) | |
1687 | return rport; | |
1688 | ||
1689 | /* restart the target */ | |
1690 | ||
1691 | /* | |
1692 | * Stop the target timer first. Take no action | |
1693 | * on the del_timer failure as the state | |
1694 | * machine state change will validate the | |
1695 | * transaction. | |
1696 | */ | |
1697 | if (!cancel_delayed_work(work)) | |
aedf3497 JS |
1698 | fc_flush_devloss(shost); |
1699 | ||
1700 | spin_lock_irqsave(shost->host_lock, flags); | |
1701 | ||
1702 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
19a7b4ae JSEC |
1703 | |
1704 | /* initiate a scan of the target */ | |
aedf3497 | 1705 | rport->flags |= FC_RPORT_SCAN_PENDING; |
19a7b4ae JSEC |
1706 | scsi_queue_work(shost, &rport->scan_work); |
1707 | ||
aedf3497 JS |
1708 | spin_unlock_irqrestore(shost->host_lock, flags); |
1709 | ||
19a7b4ae JSEC |
1710 | return rport; |
1711 | } | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | /* Search the bindings array */ | |
aedf3497 | 1716 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
1da177e4 LT |
1717 | |
1718 | /* search for a matching consistent binding */ | |
1719 | ||
aedf3497 | 1720 | list_for_each_entry(rport, &fc_host->rport_bindings, |
1da177e4 LT |
1721 | peers) { |
1722 | if (rport->channel != channel) | |
1723 | continue; | |
1724 | ||
aedf3497 | 1725 | switch (fc_host->tgtid_bind_type) { |
1da177e4 LT |
1726 | case FC_TGTID_BIND_BY_WWPN: |
1727 | if (rport->port_name == ids->port_name) | |
1728 | match = 1; | |
1729 | break; | |
1730 | case FC_TGTID_BIND_BY_WWNN: | |
1731 | if (rport->node_name == ids->node_name) | |
1732 | match = 1; | |
1733 | break; | |
1734 | case FC_TGTID_BIND_BY_ID: | |
1735 | if (rport->port_id == ids->port_id) | |
1736 | match = 1; | |
1737 | break; | |
1738 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
1739 | break; | |
1740 | } | |
1741 | ||
1742 | if (match) { | |
aedf3497 | 1743 | list_move_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
1744 | break; |
1745 | } | |
1746 | } | |
1747 | ||
1da177e4 LT |
1748 | if (match) { |
1749 | memcpy(&rport->node_name, &ids->node_name, | |
1750 | sizeof(rport->node_name)); | |
1751 | memcpy(&rport->port_name, &ids->port_name, | |
1752 | sizeof(rport->port_name)); | |
1753 | rport->port_id = ids->port_id; | |
1754 | rport->roles = ids->roles; | |
1755 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1756 | ||
19a7b4ae JSEC |
1757 | if (fci->f->dd_fcrport_size) |
1758 | memset(rport->dd_data, 0, | |
1759 | fci->f->dd_fcrport_size); | |
1760 | ||
aedf3497 | 1761 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) { |
1da177e4 | 1762 | /* initiate a scan of the target */ |
aedf3497 | 1763 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 1764 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 JS |
1765 | } |
1766 | ||
1767 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
1768 | |
1769 | return rport; | |
1770 | } | |
1771 | } | |
1772 | ||
19a7b4ae JSEC |
1773 | spin_unlock_irqrestore(shost->host_lock, flags); |
1774 | ||
1da177e4 LT |
1775 | /* No consistent binding found - create new remote port entry */ |
1776 | rport = fc_rport_create(shost, channel, ids); | |
1777 | ||
1778 | return rport; | |
1779 | } | |
1780 | EXPORT_SYMBOL(fc_remote_port_add); | |
1781 | ||
1da177e4 LT |
1782 | |
1783 | /** | |
1784 | * fc_remote_port_delete - notifies the fc transport that a remote | |
1785 | * port is no longer in existence. | |
1786 | * @rport: The remote port that no longer exists | |
1787 | * | |
1788 | * The LLDD calls this routine to notify the transport that a remote | |
1789 | * port is no longer part of the topology. Note: Although a port | |
1790 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae JSEC |
1791 | * ports displayed by the fc_host. We do this under 2 conditions: |
1792 | * - If the port was a scsi target, we delay its deletion by "blocking" it. | |
1793 | * This allows the port to temporarily disappear, then reappear without | |
1794 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
1795 | * period the port will still exist. | |
1796 | * - If the port was a scsi target and disappears for longer than we | |
1797 | * expect, we'll delete the port and the tear down the SCSI device tree | |
1798 | * attached to it. However, we want to semi-persist the target id assigned | |
1799 | * to that port if it eventually does exist. The port structure will | |
1800 | * remain (although with minimal information) so that the target id | |
1801 | * bindings remails. | |
1da177e4 LT |
1802 | * |
1803 | * If the remote port is not an FCP Target, it will be fully torn down | |
1804 | * and deallocated, including the fc_remote_port class device. | |
1805 | * | |
19a7b4ae JSEC |
1806 | * If the remote port is an FCP Target, the port will be placed in a |
1807 | * temporary blocked state. From the LLDD's perspective, the rport no | |
1808 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
1809 | * exists, but all sdevs on it are blocked from further I/O. The following | |
1810 | * is then expected: | |
1811 | * If the remote port does not return (signaled by a LLDD call to | |
1812 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
1813 | * scsi target is removed - killing all outstanding i/o and removing the | |
1814 | * scsi devices attached ot it. The port structure will be marked Not | |
1815 | * Present and be partially cleared, leaving only enough information to | |
1816 | * recognize the remote port relative to the scsi target id binding if | |
1817 | * it later appears. The port will remain as long as there is a valid | |
1818 | * binding (e.g. until the user changes the binding type or unloads the | |
1819 | * scsi host with the binding). | |
1da177e4 | 1820 | * |
19a7b4ae JSEC |
1821 | * If the remote port returns within the dev_loss_tmo value (and matches |
1822 | * according to the target id binding type), the port structure will be | |
1823 | * reused. If it is no longer a SCSI target, the target will be torn | |
1824 | * down. If it continues to be a SCSI target, then the target will be | |
1825 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
1826 | * to ensure that all luns are detected. | |
1827 | * | |
1828 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
1829 | * |
1830 | * Notes: | |
1831 | * This routine assumes no locks are held on entry. | |
1832 | **/ | |
1833 | void | |
1834 | fc_remote_port_delete(struct fc_rport *rport) | |
1835 | { | |
aedf3497 | 1836 | struct Scsi_Host *shost = rport_to_shost(rport); |
19a7b4ae | 1837 | int timeout = rport->dev_loss_tmo; |
aedf3497 JS |
1838 | unsigned long flags; |
1839 | ||
1840 | /* | |
1841 | * No need to flush the fc_host work_q's, as all adds are synchronous. | |
1842 | * | |
1843 | * We do need to reclaim the rport scan work element, so eventually | |
1844 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if | |
1845 | * there's still a scan pending. | |
1846 | */ | |
1847 | ||
1848 | spin_lock_irqsave(shost->host_lock, flags); | |
1da177e4 | 1849 | |
19a7b4ae JSEC |
1850 | /* If no scsi target id mapping, delete it */ |
1851 | if (rport->scsi_target_id == -1) { | |
aedf3497 JS |
1852 | list_del(&rport->peers); |
1853 | rport->port_state = FC_PORTSTATE_DELETED; | |
1854 | fc_queue_work(shost, &rport->rport_delete_work); | |
1855 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
1856 | return; |
1857 | } | |
1858 | ||
aedf3497 JS |
1859 | rport->port_state = FC_PORTSTATE_BLOCKED; |
1860 | ||
1861 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; | |
1862 | ||
1863 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1864 | ||
19a7b4ae | 1865 | scsi_target_block(&rport->dev); |
1da177e4 | 1866 | |
19a7b4ae | 1867 | /* cap the length the devices can be blocked until they are deleted */ |
aedf3497 | 1868 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
1da177e4 LT |
1869 | } |
1870 | EXPORT_SYMBOL(fc_remote_port_delete); | |
1871 | ||
1872 | /** | |
1873 | * fc_remote_port_rolechg - notifies the fc transport that the roles | |
1874 | * on a remote may have changed. | |
1875 | * @rport: The remote port that changed. | |
1876 | * | |
1877 | * The LLDD calls this routine to notify the transport that the roles | |
1878 | * on a remote port may have changed. The largest effect of this is | |
1879 | * if a port now becomes a FCP Target, it must be allocated a | |
1880 | * scsi target id. If the port is no longer a FCP target, any | |
1881 | * scsi target id value assigned to it will persist in case the | |
1882 | * role changes back to include FCP Target. No changes in the scsi | |
1883 | * midlayer will be invoked if the role changes (in the expectation | |
1884 | * that the role will be resumed. If it doesn't normal error processing | |
1885 | * will take place). | |
1886 | * | |
1887 | * Should not be called from interrupt context. | |
1888 | * | |
1889 | * Notes: | |
1890 | * This routine assumes no locks are held on entry. | |
1891 | **/ | |
1892 | void | |
1893 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
1894 | { | |
1895 | struct Scsi_Host *shost = rport_to_shost(rport); | |
aedf3497 | 1896 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
1897 | unsigned long flags; |
1898 | int create = 0; | |
1899 | ||
1da177e4 | 1900 | spin_lock_irqsave(shost->host_lock, flags); |
19a7b4ae JSEC |
1901 | if (roles & FC_RPORT_ROLE_FCP_TARGET) { |
1902 | if (rport->scsi_target_id == -1) { | |
1903 | rport->scsi_target_id = fc_host->next_target_id++; | |
1904 | create = 1; | |
1905 | } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) | |
1906 | create = 1; | |
1da177e4 | 1907 | } |
1da177e4 | 1908 | |
19a7b4ae JSEC |
1909 | rport->roles = roles; |
1910 | ||
aedf3497 JS |
1911 | spin_unlock_irqrestore(shost->host_lock, flags); |
1912 | ||
19a7b4ae JSEC |
1913 | if (create) { |
1914 | /* | |
1915 | * There may have been a delete timer running on the | |
1916 | * port. Ensure that it is cancelled as we now know | |
1917 | * the port is an FCP Target. | |
1918 | * Note: we know the rport is exists and in an online | |
1919 | * state as the LLDD would not have had an rport | |
1920 | * reference to pass us. | |
1921 | * | |
1922 | * Take no action on the del_timer failure as the state | |
1923 | * machine state change will validate the | |
1924 | * transaction. | |
1925 | */ | |
1926 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
aedf3497 JS |
1927 | fc_flush_devloss(shost); |
1928 | ||
1929 | spin_lock_irqsave(shost->host_lock, flags); | |
1930 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
1931 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1932 | ||
1933 | /* ensure any stgt delete functions are done */ | |
1934 | fc_flush_work(shost); | |
19a7b4ae | 1935 | |
1da177e4 | 1936 | /* initiate a scan of the target */ |
aedf3497 JS |
1937 | spin_lock_irqsave(shost->host_lock, flags); |
1938 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
1da177e4 | 1939 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 1940 | spin_unlock_irqrestore(shost->host_lock, flags); |
19a7b4ae | 1941 | } |
1da177e4 LT |
1942 | } |
1943 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
1944 | ||
1945 | /** | |
19a7b4ae JSEC |
1946 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that |
1947 | * was a SCSI target (thus was blocked), and failed | |
1948 | * to return in the alloted time. | |
1949 | * | |
1950 | * @data: rport target that failed to reappear in the alloted time. | |
1da177e4 LT |
1951 | **/ |
1952 | static void | |
19a7b4ae | 1953 | fc_timeout_deleted_rport(void *data) |
1da177e4 LT |
1954 | { |
1955 | struct fc_rport *rport = (struct fc_rport *)data; | |
19a7b4ae | 1956 | struct Scsi_Host *shost = rport_to_shost(rport); |
aedf3497 | 1957 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
19a7b4ae | 1958 | unsigned long flags; |
1da177e4 | 1959 | |
19a7b4ae | 1960 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 | 1961 | |
aedf3497 JS |
1962 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
1963 | ||
1da177e4 | 1964 | /* |
aedf3497 JS |
1965 | * If the port is ONLINE, then it came back. Validate it's still an |
1966 | * FCP target. If not, tear down the scsi_target on it. | |
1da177e4 | 1967 | */ |
aedf3497 JS |
1968 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
1969 | !(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { | |
19a7b4ae | 1970 | dev_printk(KERN_ERR, &rport->dev, |
aedf3497 JS |
1971 | "blocked FC remote port time out: no longer" |
1972 | " a FCP target, removing starget\n"); | |
1973 | fc_queue_work(shost, &rport->stgt_delete_work); | |
1974 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
1975 | return; |
1976 | } | |
1da177e4 | 1977 | |
19a7b4ae JSEC |
1978 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
1979 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1980 | dev_printk(KERN_ERR, &rport->dev, | |
1981 | "blocked FC remote port time out: leaving target alone\n"); | |
1982 | return; | |
1983 | } | |
1da177e4 | 1984 | |
aedf3497 JS |
1985 | if (fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) { |
1986 | list_del(&rport->peers); | |
1987 | rport->port_state = FC_PORTSTATE_DELETED; | |
19a7b4ae JSEC |
1988 | dev_printk(KERN_ERR, &rport->dev, |
1989 | "blocked FC remote port time out: removing target\n"); | |
aedf3497 JS |
1990 | fc_queue_work(shost, &rport->rport_delete_work); |
1991 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
1992 | return; |
1993 | } | |
1da177e4 | 1994 | |
19a7b4ae JSEC |
1995 | dev_printk(KERN_ERR, &rport->dev, |
1996 | "blocked FC remote port time out: removing target and " | |
1997 | "saving binding\n"); | |
1998 | ||
aedf3497 | 1999 | list_move_tail(&rport->peers, &fc_host->rport_bindings); |
1da177e4 LT |
2000 | |
2001 | /* | |
19a7b4ae JSEC |
2002 | * Note: We do not remove or clear the hostdata area. This allows |
2003 | * host-specific target data to persist along with the | |
2004 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 2005 | */ |
1da177e4 | 2006 | |
19a7b4ae JSEC |
2007 | /* |
2008 | * Reinitialize port attributes that may change if the port comes back. | |
2009 | */ | |
2010 | rport->maxframe_size = -1; | |
2011 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
2012 | rport->roles = FC_RPORT_ROLE_UNKNOWN; | |
aedf3497 | 2013 | rport->port_state = FC_PORTSTATE_NOTPRESENT; |
1da177e4 | 2014 | |
19a7b4ae | 2015 | /* remove the identifiers that aren't used in the consisting binding */ |
aedf3497 | 2016 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2017 | case FC_TGTID_BIND_BY_WWPN: |
2018 | rport->node_name = -1; | |
2019 | rport->port_id = -1; | |
2020 | break; | |
2021 | case FC_TGTID_BIND_BY_WWNN: | |
2022 | rport->port_name = -1; | |
2023 | rport->port_id = -1; | |
2024 | break; | |
2025 | case FC_TGTID_BIND_BY_ID: | |
2026 | rport->node_name = -1; | |
2027 | rport->port_name = -1; | |
2028 | break; | |
2029 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2030 | break; | |
2031 | } | |
2032 | ||
19a7b4ae JSEC |
2033 | /* |
2034 | * As this only occurs if the remote port (scsi target) | |
2035 | * went away and didn't come back - we'll remove | |
2036 | * all attached scsi devices. | |
2037 | */ | |
aedf3497 | 2038 | fc_queue_work(shost, &rport->stgt_delete_work); |
42e33148 JSEC |
2039 | |
2040 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 | 2041 | } |
1da177e4 LT |
2042 | |
2043 | /** | |
2044 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
19a7b4ae JSEC |
2045 | * |
2046 | * Will unblock the target (in case it went away and has now come back), | |
2047 | * then invoke a scan. | |
2048 | * | |
1da177e4 LT |
2049 | * @data: remote port to be scanned. |
2050 | **/ | |
2051 | static void | |
2052 | fc_scsi_scan_rport(void *data) | |
2053 | { | |
2054 | struct fc_rport *rport = (struct fc_rport *)data; | |
aedf3497 | 2055 | struct Scsi_Host *shost = rport_to_shost(rport); |
42e33148 JSEC |
2056 | unsigned long flags; |
2057 | ||
aedf3497 JS |
2058 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
2059 | (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { | |
2060 | scsi_target_unblock(&rport->dev); | |
2061 | scsi_scan_target(&rport->dev, rport->channel, | |
2062 | rport->scsi_target_id, SCAN_WILD_CARD, 1); | |
42e33148 | 2063 | } |
aedf3497 JS |
2064 | |
2065 | spin_lock_irqsave(shost->host_lock, flags); | |
2066 | rport->flags &= ~FC_RPORT_SCAN_PENDING; | |
42e33148 JSEC |
2067 | spin_unlock_irqrestore(shost->host_lock, flags); |
2068 | } | |
2069 | ||
2070 | ||
1da177e4 LT |
2071 | MODULE_AUTHOR("Martin Hicks"); |
2072 | MODULE_DESCRIPTION("FC Transport Attributes"); | |
2073 | MODULE_LICENSE("GPL"); | |
2074 | ||
2075 | module_init(fc_transport_init); | |
2076 | module_exit(fc_transport_exit); |