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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> | |
29 | #include <scsi/scsi_device.h> | |
30 | #include <scsi/scsi_host.h> | |
31 | #include <scsi/scsi_transport.h> | |
32 | #include <scsi/scsi_transport_fc.h> | |
33 | #include "scsi_priv.h" | |
34 | ||
35 | #define FC_PRINTK(x, l, f, a...) printk(l "scsi(%d:%d:%d:%d): " f, (x)->host->host_no, (x)->channel, (x)->id, (x)->lun , ##a) | |
36 | ||
37 | /* | |
38 | * Redefine so that we can have same named attributes in the | |
39 | * sdev/starget/host objects. | |
40 | */ | |
41 | #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
42 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
43 | __ATTR(_name,_mode,_show,_store) | |
44 | ||
45 | #define fc_enum_name_search(title, table_type, table) \ | |
46 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
47 | { \ | |
48 | int i; \ | |
49 | char *name = NULL; \ | |
50 | \ | |
51 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
52 | if (table[i].value == table_key) { \ | |
53 | name = table[i].name; \ | |
54 | break; \ | |
55 | } \ | |
56 | } \ | |
57 | return name; \ | |
58 | } | |
59 | ||
60 | #define fc_enum_name_match(title, table_type, table) \ | |
61 | static int get_fc_##title##_match(const char *table_key, \ | |
62 | enum table_type *value) \ | |
63 | { \ | |
64 | int i; \ | |
65 | \ | |
66 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
67 | if (strncmp(table_key, table[i].name, \ | |
68 | table[i].matchlen) == 0) { \ | |
69 | *value = table[i].value; \ | |
70 | return 0; /* success */ \ | |
71 | } \ | |
72 | } \ | |
73 | return 1; /* failure */ \ | |
74 | } | |
75 | ||
76 | ||
77 | /* Convert fc_port_type values to ascii string name */ | |
78 | static struct { | |
79 | enum fc_port_type value; | |
80 | char *name; | |
81 | } fc_port_type_names[] = { | |
82 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
83 | { FC_PORTTYPE_OTHER, "Other" }, | |
84 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
85 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
86 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
87 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
88 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" }, | |
89 | }; | |
90 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
91 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
92 | ||
93 | ||
94 | /* Convert fc_port_state values to ascii string name */ | |
95 | static struct { | |
96 | enum fc_port_state value; | |
97 | char *name; | |
98 | } fc_port_state_names[] = { | |
99 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
100 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
101 | { FC_PORTSTATE_ONLINE, "Online" }, | |
102 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
103 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
104 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
105 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
106 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
107 | { FC_PORTSTATE_ERROR, "Error" }, | |
108 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
109 | }; | |
110 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
111 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
112 | ||
113 | ||
114 | /* Convert fc_tgtid_binding_type values to ascii string name */ | |
115 | static struct { | |
116 | enum fc_tgtid_binding_type value; | |
117 | char *name; | |
118 | int matchlen; | |
119 | } fc_tgtid_binding_type_names[] = { | |
120 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
121 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
122 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
123 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
124 | }; | |
125 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
126 | fc_tgtid_binding_type_names) | |
127 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
128 | fc_tgtid_binding_type_names) | |
129 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
130 | ||
131 | ||
132 | #define fc_bitfield_name_search(title, table) \ | |
133 | static ssize_t \ | |
134 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
135 | { \ | |
136 | char *prefix = ""; \ | |
137 | ssize_t len = 0; \ | |
138 | int i; \ | |
139 | \ | |
140 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
141 | if (table[i].value & table_key) { \ | |
142 | len += sprintf(buf + len, "%s%s", \ | |
143 | prefix, table[i].name); \ | |
144 | prefix = ", "; \ | |
145 | } \ | |
146 | } \ | |
147 | len += sprintf(buf + len, "\n"); \ | |
148 | return len; \ | |
149 | } | |
150 | ||
151 | ||
152 | /* Convert FC_COS bit values to ascii string name */ | |
153 | static struct { | |
154 | u32 value; | |
155 | char *name; | |
156 | } fc_cos_names[] = { | |
157 | { FC_COS_CLASS1, "Class 1" }, | |
158 | { FC_COS_CLASS2, "Class 2" }, | |
159 | { FC_COS_CLASS3, "Class 3" }, | |
160 | { FC_COS_CLASS4, "Class 4" }, | |
161 | { FC_COS_CLASS6, "Class 6" }, | |
162 | }; | |
163 | fc_bitfield_name_search(cos, fc_cos_names) | |
164 | ||
165 | ||
166 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
167 | static struct { | |
168 | u32 value; | |
169 | char *name; | |
170 | } fc_port_speed_names[] = { | |
171 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
172 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
173 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
174 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
175 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, | |
176 | }; | |
177 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
178 | ||
179 | ||
180 | static int | |
181 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
182 | { | |
183 | int i, len=0; | |
184 | ||
185 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
186 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
187 | len += sprintf(buf + len, "\n"); | |
188 | return len; | |
189 | } | |
190 | ||
191 | ||
192 | /* Convert FC_RPORT_ROLE bit values to ascii string name */ | |
193 | static struct { | |
194 | u32 value; | |
195 | char *name; | |
196 | } fc_remote_port_role_names[] = { | |
197 | { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" }, | |
198 | { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
199 | { FC_RPORT_ROLE_IP_PORT, "IP Port" }, | |
200 | }; | |
201 | fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names) | |
202 | ||
203 | /* | |
204 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
205 | */ | |
206 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
207 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
208 | #define FC_FPORT_PORTID 0x00000e | |
209 | #define FC_FABCTLR_PORTID 0x00000d | |
210 | #define FC_DIRSRVR_PORTID 0x00000c | |
211 | #define FC_TIMESRVR_PORTID 0x00000b | |
212 | #define FC_MGMTSRVR_PORTID 0x00000a | |
213 | ||
214 | ||
215 | static void fc_timeout_blocked_rport(void *data); | |
216 | static void fc_scsi_scan_rport(void *data); | |
217 | static void fc_rport_terminate(struct fc_rport *rport); | |
218 | ||
219 | /* | |
220 | * Attribute counts pre object type... | |
221 | * Increase these values if you add attributes | |
222 | */ | |
223 | #define FC_STARGET_NUM_ATTRS 3 | |
224 | #define FC_RPORT_NUM_ATTRS 9 | |
225 | #define FC_HOST_NUM_ATTRS 15 | |
226 | ||
227 | struct fc_internal { | |
228 | struct scsi_transport_template t; | |
229 | struct fc_function_template *f; | |
230 | ||
231 | /* | |
232 | * For attributes : each object has : | |
233 | * An array of the actual attributes structures | |
234 | * An array of null-terminated pointers to the attribute | |
235 | * structures - used for mid-layer interaction. | |
236 | * | |
237 | * The attribute containers for the starget and host are are | |
238 | * part of the midlayer. As the remote port is specific to the | |
239 | * fc transport, we must provide the attribute container. | |
240 | */ | |
241 | struct class_device_attribute private_starget_attrs[ | |
242 | FC_STARGET_NUM_ATTRS]; | |
243 | struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; | |
244 | ||
245 | struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; | |
246 | struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
247 | ||
248 | struct transport_container rport_attr_cont; | |
249 | struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; | |
250 | struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
251 | }; | |
252 | ||
253 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
254 | ||
255 | static int fc_target_setup(struct device *dev) | |
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 device *dev) | |
285 | { | |
286 | struct Scsi_Host *shost = dev_to_shost(dev); | |
287 | ||
288 | /* | |
289 | * Set default values easily detected by the midlayer as | |
290 | * failure cases. The scsi lldd is responsible for initializing | |
291 | * all transport attributes to valid values per host. | |
292 | */ | |
293 | fc_host_node_name(shost) = -1; | |
294 | fc_host_port_name(shost) = -1; | |
295 | fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED; | |
296 | memset(fc_host_supported_fc4s(shost), 0, | |
297 | sizeof(fc_host_supported_fc4s(shost))); | |
298 | memset(fc_host_symbolic_name(shost), 0, | |
299 | sizeof(fc_host_symbolic_name(shost))); | |
300 | fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN; | |
301 | fc_host_maxframe_size(shost) = -1; | |
302 | memset(fc_host_serial_number(shost), 0, | |
303 | sizeof(fc_host_serial_number(shost))); | |
304 | ||
305 | fc_host_port_id(shost) = -1; | |
306 | fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; | |
307 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
308 | memset(fc_host_active_fc4s(shost), 0, | |
309 | sizeof(fc_host_active_fc4s(shost))); | |
310 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
311 | fc_host_fabric_name(shost) = -1; | |
312 | ||
313 | fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN; | |
314 | ||
315 | INIT_LIST_HEAD(&fc_host_rports(shost)); | |
316 | INIT_LIST_HEAD(&fc_host_rport_bindings(shost)); | |
317 | fc_host_next_rport_number(shost) = 0; | |
318 | fc_host_next_target_id(shost) = 0; | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
323 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
324 | "fc_host", | |
325 | fc_host_setup, | |
326 | NULL, | |
327 | NULL); | |
328 | ||
329 | /* | |
330 | * Setup and Remove actions for remote ports are handled | |
331 | * in the service functions below. | |
332 | */ | |
333 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
334 | "fc_remote_ports", | |
335 | NULL, | |
336 | NULL, | |
337 | NULL); | |
338 | ||
339 | /* | |
340 | * Module Parameters | |
341 | */ | |
342 | ||
343 | /* | |
344 | * dev_loss_tmo: the default number of seconds that the FC transport | |
345 | * should insulate the loss of a remote port. | |
346 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
347 | */ | |
348 | static unsigned int fc_dev_loss_tmo = SCSI_DEVICE_BLOCK_MAX_TIMEOUT; | |
349 | ||
350 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR); | |
351 | MODULE_PARM_DESC(dev_loss_tmo, | |
352 | "Maximum number of seconds that the FC transport should" | |
353 | " insulate the loss of a remote port. Once this value is" | |
354 | " exceeded, the scsi target is removed. Value should be" | |
355 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); | |
356 | ||
357 | ||
358 | static __init int fc_transport_init(void) | |
359 | { | |
360 | int error = transport_class_register(&fc_host_class); | |
361 | if (error) | |
362 | return error; | |
363 | error = transport_class_register(&fc_rport_class); | |
364 | if (error) | |
365 | return error; | |
366 | return transport_class_register(&fc_transport_class); | |
367 | } | |
368 | ||
369 | static void __exit fc_transport_exit(void) | |
370 | { | |
371 | transport_class_unregister(&fc_transport_class); | |
372 | transport_class_unregister(&fc_rport_class); | |
373 | transport_class_unregister(&fc_host_class); | |
374 | } | |
375 | ||
376 | /* | |
377 | * FC Remote Port Attribute Management | |
378 | */ | |
379 | ||
380 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
381 | static ssize_t \ | |
382 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
383 | { \ | |
384 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
385 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
386 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
387 | if (i->f->get_rport_##field) \ | |
388 | i->f->get_rport_##field(rport); \ | |
389 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
390 | } | |
391 | ||
392 | #define fc_rport_store_function(field) \ | |
393 | static ssize_t \ | |
394 | store_fc_rport_##field(struct class_device *cdev, const char *buf, \ | |
395 | size_t count) \ | |
396 | { \ | |
397 | int val; \ | |
398 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
399 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
400 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
401 | val = simple_strtoul(buf, NULL, 0); \ | |
402 | i->f->set_rport_##field(rport, val); \ | |
403 | return count; \ | |
404 | } | |
405 | ||
406 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
407 | fc_rport_show_function(field, format_string, sz, ) \ | |
408 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
409 | show_fc_rport_##field, NULL) | |
410 | ||
411 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
412 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
413 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
414 | show_fc_rport_##field, NULL) | |
415 | ||
416 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
417 | fc_rport_show_function(field, format_string, sz, ) \ | |
418 | fc_rport_store_function(field) \ | |
419 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ | |
420 | show_fc_rport_##field, \ | |
421 | store_fc_rport_##field) | |
422 | ||
423 | ||
424 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
425 | static ssize_t \ | |
426 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
427 | { \ | |
428 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
429 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
430 | } | |
431 | ||
432 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
433 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
434 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
435 | show_fc_rport_##field, NULL) | |
436 | ||
437 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
438 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
439 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
440 | show_fc_rport_##field, NULL) | |
441 | ||
442 | ||
443 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
444 | static ssize_t \ | |
445 | show_fc_rport_##title (struct class_device *cdev, char *buf) \ | |
446 | { \ | |
447 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
448 | const char *name; \ | |
449 | name = get_fc_##title##_name(rport->title); \ | |
450 | if (!name) \ | |
451 | return -EINVAL; \ | |
452 | return snprintf(buf, maxlen, "%s\n", name); \ | |
453 | } \ | |
454 | static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \ | |
455 | show_fc_rport_##title, NULL) | |
456 | ||
457 | ||
458 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
459 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
460 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
461 | i->private_rport_attrs[count].store = NULL; \ | |
462 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
463 | if (i->f->show_rport_##field) \ | |
464 | count++ | |
465 | ||
466 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
467 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
468 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
469 | i->private_rport_attrs[count].store = NULL; \ | |
470 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
471 | count++ | |
472 | ||
473 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
474 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
475 | if (!i->f->set_rport_##field) { \ | |
476 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
477 | i->private_rport_attrs[count].store = NULL; \ | |
478 | } \ | |
479 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
480 | if (i->f->show_rport_##field) \ | |
481 | count++ | |
482 | ||
483 | ||
484 | /* The FC Transport Remote Port Attributes: */ | |
485 | ||
486 | /* Fixed Remote Port Attributes */ | |
487 | ||
488 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
489 | ||
490 | static ssize_t | |
491 | show_fc_rport_supported_classes (struct class_device *cdev, char *buf) | |
492 | { | |
493 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
494 | if (rport->supported_classes == FC_COS_UNSPECIFIED) | |
495 | return snprintf(buf, 20, "unspecified\n"); | |
496 | return get_fc_cos_names(rport->supported_classes, buf); | |
497 | } | |
498 | static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO, | |
499 | show_fc_rport_supported_classes, NULL); | |
500 | ||
501 | /* Dynamic Remote Port Attributes */ | |
502 | ||
503 | fc_rport_rw_attr(dev_loss_tmo, "%d\n", 20); | |
504 | ||
505 | ||
506 | /* Private Remote Port Attributes */ | |
507 | ||
508 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
509 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
510 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
511 | ||
512 | static ssize_t | |
513 | show_fc_rport_roles (struct class_device *cdev, char *buf) | |
514 | { | |
515 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
516 | ||
517 | /* identify any roles that are port_id specific */ | |
518 | if ((rport->port_id != -1) && | |
519 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
520 | FC_WELLKNOWN_PORTID_MASK) { | |
521 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
522 | case FC_FPORT_PORTID: | |
523 | return snprintf(buf, 30, "Fabric Port\n"); | |
524 | case FC_FABCTLR_PORTID: | |
525 | return snprintf(buf, 30, "Fabric Controller\n"); | |
526 | case FC_DIRSRVR_PORTID: | |
527 | return snprintf(buf, 30, "Directory Server\n"); | |
528 | case FC_TIMESRVR_PORTID: | |
529 | return snprintf(buf, 30, "Time Server\n"); | |
530 | case FC_MGMTSRVR_PORTID: | |
531 | return snprintf(buf, 30, "Management Server\n"); | |
532 | default: | |
533 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
534 | } | |
535 | } else { | |
536 | if (rport->roles == FC_RPORT_ROLE_UNKNOWN) | |
537 | return snprintf(buf, 20, "unknown\n"); | |
538 | return get_fc_remote_port_roles_names(rport->roles, buf); | |
539 | } | |
540 | } | |
541 | static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO, | |
542 | show_fc_rport_roles, NULL); | |
543 | ||
544 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
545 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
546 | ||
547 | ||
548 | ||
549 | /* | |
550 | * FC SCSI Target Attribute Management | |
551 | */ | |
552 | ||
553 | /* | |
554 | * Note: in the target show function we recognize when the remote | |
555 | * port is in the heirarchy and do not allow the driver to get | |
556 | * involved in sysfs functions. The driver only gets involved if | |
557 | * it's the "old" style that doesn't use rports. | |
558 | */ | |
559 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
560 | static ssize_t \ | |
561 | show_fc_starget_##field (struct class_device *cdev, char *buf) \ | |
562 | { \ | |
563 | struct scsi_target *starget = transport_class_to_starget(cdev); \ | |
564 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ | |
565 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
566 | struct fc_rport *rport = starget_to_rport(starget); \ | |
567 | if (rport) \ | |
568 | fc_starget_##field(starget) = rport->field; \ | |
569 | else if (i->f->get_starget_##field) \ | |
570 | i->f->get_starget_##field(starget); \ | |
571 | return snprintf(buf, sz, format_string, \ | |
572 | cast fc_starget_##field(starget)); \ | |
573 | } | |
574 | ||
575 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
576 | fc_starget_show_function(field, format_string, sz, ) \ | |
577 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
578 | show_fc_starget_##field, NULL) | |
579 | ||
580 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
581 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
582 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
583 | show_fc_starget_##field, NULL) | |
584 | ||
585 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
586 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
587 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
588 | i->private_starget_attrs[count].store = NULL; \ | |
589 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
590 | if (i->f->show_starget_##field) \ | |
591 | count++ | |
592 | ||
593 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
594 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
595 | if (!i->f->set_starget_##field) { \ | |
596 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
597 | i->private_starget_attrs[count].store = NULL; \ | |
598 | } \ | |
599 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
600 | if (i->f->show_starget_##field) \ | |
601 | count++ | |
602 | ||
603 | /* The FC Transport SCSI Target Attributes: */ | |
604 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
605 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
606 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
607 | ||
608 | ||
609 | /* | |
610 | * Host Attribute Management | |
611 | */ | |
612 | ||
613 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
614 | static ssize_t \ | |
615 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
616 | { \ | |
617 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
618 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
619 | if (i->f->get_host_##field) \ | |
620 | i->f->get_host_##field(shost); \ | |
621 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
622 | } | |
623 | ||
624 | #define fc_host_store_function(field) \ | |
625 | static ssize_t \ | |
626 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
627 | size_t count) \ | |
628 | { \ | |
629 | int val; \ | |
630 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
631 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
632 | \ | |
633 | val = simple_strtoul(buf, NULL, 0); \ | |
634 | i->f->set_host_##field(shost, val); \ | |
635 | return count; \ | |
636 | } | |
637 | ||
638 | #define fc_host_rd_attr(field, format_string, sz) \ | |
639 | fc_host_show_function(field, format_string, sz, ) \ | |
640 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
641 | show_fc_host_##field, NULL) | |
642 | ||
643 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
644 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
645 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
646 | show_fc_host_##field, NULL) | |
647 | ||
648 | #define fc_host_rw_attr(field, format_string, sz) \ | |
649 | fc_host_show_function(field, format_string, sz, ) \ | |
650 | fc_host_store_function(field) \ | |
651 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ | |
652 | show_fc_host_##field, \ | |
653 | store_fc_host_##field) | |
654 | ||
655 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
656 | static ssize_t \ | |
657 | show_fc_host_##title (struct class_device *cdev, char *buf) \ | |
658 | { \ | |
659 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
660 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
661 | const char *name; \ | |
662 | if (i->f->get_host_##title) \ | |
663 | i->f->get_host_##title(shost); \ | |
664 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
665 | if (!name) \ | |
666 | return -EINVAL; \ | |
667 | return snprintf(buf, maxlen, "%s\n", name); \ | |
668 | } \ | |
669 | static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) | |
670 | ||
671 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
672 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
673 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
674 | i->private_host_attrs[count].store = NULL; \ | |
675 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
676 | if (i->f->show_host_##field) \ | |
677 | count++ | |
678 | ||
679 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ | |
680 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
681 | if (!i->f->set_host_##field) { \ | |
682 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
683 | i->private_host_attrs[count].store = NULL; \ | |
684 | } \ | |
685 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
686 | if (i->f->show_host_##field) \ | |
687 | count++ | |
688 | ||
689 | ||
690 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
691 | static ssize_t \ | |
692 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
693 | { \ | |
694 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
695 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
696 | } | |
697 | ||
698 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
699 | fc_private_host_show_function(field, format_string, sz, ) \ | |
700 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
701 | show_fc_host_##field, NULL) | |
702 | ||
703 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
704 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
705 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
706 | show_fc_host_##field, NULL) | |
707 | ||
708 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
709 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
710 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
711 | i->private_host_attrs[count].store = NULL; \ | |
712 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
713 | count++ | |
714 | ||
715 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
716 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
717 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
718 | count++ | |
719 | ||
720 | ||
721 | /* Fixed Host Attributes */ | |
722 | ||
723 | static ssize_t | |
724 | show_fc_host_supported_classes (struct class_device *cdev, char *buf) | |
725 | { | |
726 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
727 | ||
728 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
729 | return snprintf(buf, 20, "unspecified\n"); | |
730 | ||
731 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
732 | } | |
733 | static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, | |
734 | show_fc_host_supported_classes, NULL); | |
735 | ||
736 | static ssize_t | |
737 | show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) | |
738 | { | |
739 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
740 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); | |
741 | } | |
742 | static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, | |
743 | show_fc_host_supported_fc4s, NULL); | |
744 | ||
745 | static ssize_t | |
746 | show_fc_host_supported_speeds (struct class_device *cdev, char *buf) | |
747 | { | |
748 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
749 | ||
750 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
751 | return snprintf(buf, 20, "unknown\n"); | |
752 | ||
753 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
754 | } | |
755 | static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, | |
756 | show_fc_host_supported_speeds, NULL); | |
757 | ||
758 | ||
759 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
760 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
761 | fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1)); | |
762 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); | |
763 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); | |
764 | ||
765 | ||
766 | /* Dynamic Host Attributes */ | |
767 | ||
768 | static ssize_t | |
769 | show_fc_host_active_fc4s (struct class_device *cdev, char *buf) | |
770 | { | |
771 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
772 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
773 | ||
774 | if (i->f->get_host_active_fc4s) | |
775 | i->f->get_host_active_fc4s(shost); | |
776 | ||
777 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
778 | } | |
779 | static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, | |
780 | show_fc_host_active_fc4s, NULL); | |
781 | ||
782 | static ssize_t | |
783 | show_fc_host_speed (struct class_device *cdev, char *buf) | |
784 | { | |
785 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
786 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
787 | ||
788 | if (i->f->get_host_speed) | |
789 | i->f->get_host_speed(shost); | |
790 | ||
791 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
792 | return snprintf(buf, 20, "unknown\n"); | |
793 | ||
794 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
795 | } | |
796 | static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, | |
797 | show_fc_host_speed, NULL); | |
798 | ||
799 | ||
800 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
801 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
802 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
803 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
804 | ||
805 | ||
806 | /* Private Host Attributes */ | |
807 | ||
808 | static ssize_t | |
809 | show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) | |
810 | { | |
811 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
812 | const char *name; | |
813 | ||
814 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
815 | if (!name) | |
816 | return -EINVAL; | |
817 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
818 | } | |
819 | ||
820 | static ssize_t | |
821 | store_fc_private_host_tgtid_bind_type(struct class_device *cdev, | |
822 | const char *buf, size_t count) | |
823 | { | |
824 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
825 | struct fc_rport *rport, *next_rport; | |
826 | enum fc_tgtid_binding_type val; | |
827 | unsigned long flags; | |
828 | ||
829 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
830 | return -EINVAL; | |
831 | ||
832 | /* if changing bind type, purge all unused consistent bindings */ | |
833 | if (val != fc_host_tgtid_bind_type(shost)) { | |
834 | spin_lock_irqsave(shost->host_lock, flags); | |
835 | list_for_each_entry_safe(rport, next_rport, | |
836 | &fc_host_rport_bindings(shost), peers) | |
837 | fc_rport_terminate(rport); | |
838 | spin_unlock_irqrestore(shost->host_lock, flags); | |
839 | } | |
840 | ||
841 | fc_host_tgtid_bind_type(shost) = val; | |
842 | return count; | |
843 | } | |
844 | ||
845 | static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, | |
846 | show_fc_private_host_tgtid_bind_type, | |
847 | store_fc_private_host_tgtid_bind_type); | |
848 | ||
849 | /* | |
850 | * Host Statistics Management | |
851 | */ | |
852 | ||
853 | /* Show a given an attribute in the statistics group */ | |
854 | static ssize_t | |
855 | fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) | |
856 | { | |
857 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
858 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
859 | struct fc_host_statistics *stats; | |
860 | ssize_t ret = -ENOENT; | |
861 | ||
862 | if (offset > sizeof(struct fc_host_statistics) || | |
863 | offset % sizeof(u64) != 0) | |
864 | WARN_ON(1); | |
865 | ||
866 | if (i->f->get_fc_host_stats) { | |
867 | stats = (i->f->get_fc_host_stats)(shost); | |
868 | if (stats) | |
869 | ret = snprintf(buf, 20, "0x%llx\n", | |
870 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
871 | } | |
872 | return ret; | |
873 | } | |
874 | ||
875 | ||
876 | /* generate a read-only statistics attribute */ | |
877 | #define fc_host_statistic(name) \ | |
878 | static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ | |
879 | { \ | |
880 | return fc_stat_show(cd, buf, \ | |
881 | offsetof(struct fc_host_statistics, name)); \ | |
882 | } \ | |
883 | static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) | |
884 | ||
885 | fc_host_statistic(seconds_since_last_reset); | |
886 | fc_host_statistic(tx_frames); | |
887 | fc_host_statistic(tx_words); | |
888 | fc_host_statistic(rx_frames); | |
889 | fc_host_statistic(rx_words); | |
890 | fc_host_statistic(lip_count); | |
891 | fc_host_statistic(nos_count); | |
892 | fc_host_statistic(error_frames); | |
893 | fc_host_statistic(dumped_frames); | |
894 | fc_host_statistic(link_failure_count); | |
895 | fc_host_statistic(loss_of_sync_count); | |
896 | fc_host_statistic(loss_of_signal_count); | |
897 | fc_host_statistic(prim_seq_protocol_err_count); | |
898 | fc_host_statistic(invalid_tx_word_count); | |
899 | fc_host_statistic(invalid_crc_count); | |
900 | fc_host_statistic(fcp_input_requests); | |
901 | fc_host_statistic(fcp_output_requests); | |
902 | fc_host_statistic(fcp_control_requests); | |
903 | fc_host_statistic(fcp_input_megabytes); | |
904 | fc_host_statistic(fcp_output_megabytes); | |
905 | ||
906 | static ssize_t | |
907 | fc_reset_statistics(struct class_device *cdev, const char *buf, | |
908 | size_t count) | |
909 | { | |
910 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
911 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
912 | ||
913 | /* ignore any data value written to the attribute */ | |
914 | if (i->f->reset_fc_host_stats) { | |
915 | i->f->reset_fc_host_stats(shost); | |
916 | return count; | |
917 | } | |
918 | ||
919 | return -ENOENT; | |
920 | } | |
921 | static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, | |
922 | fc_reset_statistics); | |
923 | ||
924 | ||
925 | static struct attribute *fc_statistics_attrs[] = { | |
926 | &class_device_attr_host_seconds_since_last_reset.attr, | |
927 | &class_device_attr_host_tx_frames.attr, | |
928 | &class_device_attr_host_tx_words.attr, | |
929 | &class_device_attr_host_rx_frames.attr, | |
930 | &class_device_attr_host_rx_words.attr, | |
931 | &class_device_attr_host_lip_count.attr, | |
932 | &class_device_attr_host_nos_count.attr, | |
933 | &class_device_attr_host_error_frames.attr, | |
934 | &class_device_attr_host_dumped_frames.attr, | |
935 | &class_device_attr_host_link_failure_count.attr, | |
936 | &class_device_attr_host_loss_of_sync_count.attr, | |
937 | &class_device_attr_host_loss_of_signal_count.attr, | |
938 | &class_device_attr_host_prim_seq_protocol_err_count.attr, | |
939 | &class_device_attr_host_invalid_tx_word_count.attr, | |
940 | &class_device_attr_host_invalid_crc_count.attr, | |
941 | &class_device_attr_host_fcp_input_requests.attr, | |
942 | &class_device_attr_host_fcp_output_requests.attr, | |
943 | &class_device_attr_host_fcp_control_requests.attr, | |
944 | &class_device_attr_host_fcp_input_megabytes.attr, | |
945 | &class_device_attr_host_fcp_output_megabytes.attr, | |
946 | &class_device_attr_host_reset_statistics.attr, | |
947 | NULL | |
948 | }; | |
949 | ||
950 | static struct attribute_group fc_statistics_group = { | |
951 | .name = "statistics", | |
952 | .attrs = fc_statistics_attrs, | |
953 | }; | |
954 | ||
955 | static int fc_host_match(struct attribute_container *cont, | |
956 | struct device *dev) | |
957 | { | |
958 | struct Scsi_Host *shost; | |
959 | struct fc_internal *i; | |
960 | ||
961 | if (!scsi_is_host_device(dev)) | |
962 | return 0; | |
963 | ||
964 | shost = dev_to_shost(dev); | |
965 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
966 | != &fc_host_class.class) | |
967 | return 0; | |
968 | ||
969 | i = to_fc_internal(shost->transportt); | |
970 | ||
971 | return &i->t.host_attrs.ac == cont; | |
972 | } | |
973 | ||
974 | static int fc_target_match(struct attribute_container *cont, | |
975 | struct device *dev) | |
976 | { | |
977 | struct Scsi_Host *shost; | |
978 | struct fc_internal *i; | |
979 | ||
980 | if (!scsi_is_target_device(dev)) | |
981 | return 0; | |
982 | ||
983 | shost = dev_to_shost(dev->parent); | |
984 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
985 | != &fc_host_class.class) | |
986 | return 0; | |
987 | ||
988 | i = to_fc_internal(shost->transportt); | |
989 | ||
990 | return &i->t.target_attrs.ac == cont; | |
991 | } | |
992 | ||
993 | static void fc_rport_dev_release(struct device *dev) | |
994 | { | |
995 | struct fc_rport *rport = dev_to_rport(dev); | |
996 | put_device(dev->parent); | |
997 | kfree(rport); | |
998 | } | |
999 | ||
1000 | int scsi_is_fc_rport(const struct device *dev) | |
1001 | { | |
1002 | return dev->release == fc_rport_dev_release; | |
1003 | } | |
1004 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1005 | ||
1006 | static int fc_rport_match(struct attribute_container *cont, | |
1007 | struct device *dev) | |
1008 | { | |
1009 | struct Scsi_Host *shost; | |
1010 | struct fc_internal *i; | |
1011 | ||
1012 | if (!scsi_is_fc_rport(dev)) | |
1013 | return 0; | |
1014 | ||
1015 | shost = dev_to_shost(dev->parent); | |
1016 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1017 | != &fc_host_class.class) | |
1018 | return 0; | |
1019 | ||
1020 | i = to_fc_internal(shost->transportt); | |
1021 | ||
1022 | return &i->rport_attr_cont.ac == cont; | |
1023 | } | |
1024 | ||
1025 | struct scsi_transport_template * | |
1026 | fc_attach_transport(struct fc_function_template *ft) | |
1027 | { | |
1028 | struct fc_internal *i = kmalloc(sizeof(struct fc_internal), | |
1029 | GFP_KERNEL); | |
1030 | int count; | |
1031 | ||
1032 | if (unlikely(!i)) | |
1033 | return NULL; | |
1034 | ||
1035 | memset(i, 0, sizeof(struct fc_internal)); | |
1036 | ||
1037 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; | |
1038 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
1039 | i->t.target_attrs.ac.match = fc_target_match; | |
1040 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
1041 | transport_container_register(&i->t.target_attrs); | |
1042 | ||
1043 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1044 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
1045 | i->t.host_attrs.ac.match = fc_host_match; | |
1046 | i->t.host_size = sizeof(struct fc_host_attrs); | |
1047 | if (ft->get_fc_host_stats) | |
1048 | i->t.host_attrs.statistics = &fc_statistics_group; | |
1049 | transport_container_register(&i->t.host_attrs); | |
1050 | ||
1051 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
1052 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
1053 | i->rport_attr_cont.ac.match = fc_rport_match; | |
1054 | transport_container_register(&i->rport_attr_cont); | |
1055 | ||
1056 | i->f = ft; | |
1057 | ||
1058 | /* Transport uses the shost workq for scsi scanning */ | |
1059 | i->t.create_work_queue = 1; | |
1060 | ||
1061 | /* | |
1062 | * Setup SCSI Target Attributes. | |
1063 | */ | |
1064 | count = 0; | |
1065 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
1066 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
1067 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
1068 | ||
1069 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
1070 | ||
1071 | i->starget_attrs[count] = NULL; | |
1072 | ||
1073 | ||
1074 | /* | |
1075 | * Setup SCSI Host Attributes. | |
1076 | */ | |
1077 | count=0; | |
1078 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
1079 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
1080 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); | |
1081 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1082 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); | |
1083 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); | |
1084 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
1085 | SETUP_HOST_ATTRIBUTE_RD(serial_number); | |
1086 | ||
1087 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
1088 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
1089 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
1090 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
1091 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
1092 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
1093 | ||
1094 | /* Transport-managed attributes */ | |
1095 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); | |
1096 | ||
1097 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
1098 | ||
1099 | i->host_attrs[count] = NULL; | |
1100 | ||
1101 | /* | |
1102 | * Setup Remote Port Attributes. | |
1103 | */ | |
1104 | count=0; | |
1105 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
1106 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
1107 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
1108 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
1109 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
1110 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
1111 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
1112 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
1113 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
1114 | ||
1115 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
1116 | ||
1117 | i->rport_attrs[count] = NULL; | |
1118 | ||
1119 | return &i->t; | |
1120 | } | |
1121 | EXPORT_SYMBOL(fc_attach_transport); | |
1122 | ||
1123 | void fc_release_transport(struct scsi_transport_template *t) | |
1124 | { | |
1125 | struct fc_internal *i = to_fc_internal(t); | |
1126 | ||
1127 | transport_container_unregister(&i->t.target_attrs); | |
1128 | transport_container_unregister(&i->t.host_attrs); | |
1129 | transport_container_unregister(&i->rport_attr_cont); | |
1130 | ||
1131 | kfree(i); | |
1132 | } | |
1133 | EXPORT_SYMBOL(fc_release_transport); | |
1134 | ||
1135 | ||
1136 | /** | |
1137 | * fc_remove_host - called to terminate any fc_transport-related elements | |
1138 | * for a scsi host. | |
1139 | * @rport: remote port to be unblocked. | |
1140 | * | |
1141 | * This routine is expected to be called immediately preceeding the | |
1142 | * a driver's call to scsi_remove_host(). | |
1143 | * | |
1144 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
1145 | * this routine prior to scsi_remote_host(), will leave dangling | |
1146 | * objects in /sys/class/fc_remote_ports. Access to any of these | |
1147 | * objects can result in a system crash !!! | |
1148 | * | |
1149 | * Notes: | |
1150 | * This routine assumes no locks are held on entry. | |
1151 | **/ | |
1152 | void | |
1153 | fc_remove_host(struct Scsi_Host *shost) | |
1154 | { | |
1155 | struct fc_rport *rport, *next_rport; | |
1156 | ||
1157 | /* Remove any remote ports */ | |
1158 | list_for_each_entry_safe(rport, next_rport, | |
1159 | &fc_host_rports(shost), peers) | |
1160 | fc_rport_terminate(rport); | |
1161 | list_for_each_entry_safe(rport, next_rport, | |
1162 | &fc_host_rport_bindings(shost), peers) | |
1163 | fc_rport_terminate(rport); | |
1164 | } | |
1165 | EXPORT_SYMBOL(fc_remove_host); | |
1166 | ||
1167 | /** | |
1168 | * fc_rport_create - allocates and creates a remote FC port. | |
1169 | * @shost: scsi host the remote port is connected to. | |
1170 | * @channel: Channel on shost port connected to. | |
1171 | * @ids: The world wide names, fc address, and FC4 port | |
1172 | * roles for the remote port. | |
1173 | * | |
1174 | * Allocates and creates the remoter port structure, including the | |
1175 | * class and sysfs creation. | |
1176 | * | |
1177 | * Notes: | |
1178 | * This routine assumes no locks are held on entry. | |
1179 | **/ | |
1180 | struct fc_rport * | |
1181 | fc_rport_create(struct Scsi_Host *shost, int channel, | |
1182 | struct fc_rport_identifiers *ids) | |
1183 | { | |
1184 | struct fc_host_attrs *fc_host = | |
1185 | (struct fc_host_attrs *)shost->shost_data; | |
1186 | struct fc_internal *fci = to_fc_internal(shost->transportt); | |
1187 | struct fc_rport *rport; | |
1188 | struct device *dev; | |
1189 | unsigned long flags; | |
1190 | int error; | |
1191 | size_t size; | |
1192 | ||
1193 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
1194 | rport = kmalloc(size, GFP_KERNEL); | |
1195 | if (unlikely(!rport)) { | |
1196 | printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); | |
1197 | return NULL; | |
1198 | } | |
1199 | memset(rport, 0, size); | |
1200 | ||
1201 | rport->maxframe_size = -1; | |
1202 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1203 | rport->dev_loss_tmo = fc_dev_loss_tmo; | |
1204 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); | |
1205 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
1206 | rport->port_id = ids->port_id; | |
1207 | rport->roles = ids->roles; | |
1208 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1209 | if (fci->f->dd_fcrport_size) | |
1210 | rport->dd_data = &rport[1]; | |
1211 | rport->channel = channel; | |
1212 | ||
1213 | INIT_WORK(&rport->dev_loss_work, fc_timeout_blocked_rport, rport); | |
1214 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport); | |
1215 | ||
1216 | spin_lock_irqsave(shost->host_lock, flags); | |
1217 | ||
1218 | rport->number = fc_host->next_rport_number++; | |
1219 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1220 | rport->scsi_target_id = fc_host->next_target_id++; | |
1221 | else | |
1222 | rport->scsi_target_id = -1; | |
1223 | list_add_tail(&rport->peers, &fc_host_rports(shost)); | |
1224 | get_device(&shost->shost_gendev); | |
1225 | ||
1226 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1227 | ||
1228 | dev = &rport->dev; | |
1229 | device_initialize(dev); | |
1230 | dev->parent = get_device(&shost->shost_gendev); | |
1231 | dev->release = fc_rport_dev_release; | |
1232 | sprintf(dev->bus_id, "rport-%d:%d-%d", | |
1233 | shost->host_no, channel, rport->number); | |
1234 | transport_setup_device(dev); | |
1235 | ||
1236 | error = device_add(dev); | |
1237 | if (error) { | |
1238 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
1239 | goto delete_rport; | |
1240 | } | |
1241 | transport_add_device(dev); | |
1242 | transport_configure_device(dev); | |
1243 | ||
1244 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1245 | /* initiate a scan of the target */ | |
1246 | scsi_queue_work(shost, &rport->scan_work); | |
1247 | ||
1248 | return rport; | |
1249 | ||
1250 | delete_rport: | |
1251 | transport_destroy_device(dev); | |
1252 | put_device(dev->parent); | |
1253 | spin_lock_irqsave(shost->host_lock, flags); | |
1254 | list_del(&rport->peers); | |
1255 | put_device(&shost->shost_gendev); | |
1256 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1257 | put_device(dev->parent); | |
1258 | kfree(rport); | |
1259 | return NULL; | |
1260 | } | |
1261 | ||
1262 | /** | |
1263 | * fc_remote_port_add - notifies the fc transport of the existence | |
1264 | * of a remote FC port. | |
1265 | * @shost: scsi host the remote port is connected to. | |
1266 | * @channel: Channel on shost port connected to. | |
1267 | * @ids: The world wide names, fc address, and FC4 port | |
1268 | * roles for the remote port. | |
1269 | * | |
1270 | * The LLDD calls this routine to notify the transport of the existence | |
1271 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
1272 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
1273 | * active for the port. | |
1274 | * | |
1275 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
1276 | * maintains consistent target id bindings on behalf of the LLDD. | |
1277 | * A consistent target id binding is an assignment of a target id to | |
1278 | * a remote port identifier, which persists while the scsi host is | |
1279 | * attached. The remote port can disappear, then later reappear, and | |
1280 | * it's target id assignment remains the same. This allows for shifts | |
1281 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
1282 | * changes to the scsi subsystem which is based on scsi host number and | |
1283 | * target id values. Bindings are only valid during the attachment of | |
1284 | * the scsi host. If the host detaches, then later re-attaches, target | |
1285 | * id bindings may change. | |
1286 | * | |
1287 | * This routine is responsible for returning a remote port structure. | |
1288 | * The routine will search the list of remote ports it maintains | |
1289 | * internally on behalf of consistent target id mappings. If found, the | |
1290 | * remote port structure will be reused. Otherwise, a new remote port | |
1291 | * structure will be allocated. | |
1292 | * | |
1293 | * Whenever a remote port is allocated, a new fc_remote_port class | |
1294 | * device is created. | |
1295 | * | |
1296 | * Should not be called from interrupt context. | |
1297 | * | |
1298 | * Notes: | |
1299 | * This routine assumes no locks are held on entry. | |
1300 | **/ | |
1301 | struct fc_rport * | |
1302 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
1303 | struct fc_rport_identifiers *ids) | |
1304 | { | |
1305 | struct fc_rport *rport; | |
1306 | unsigned long flags; | |
1307 | int match = 0; | |
1308 | ||
1309 | if (likely((ids->roles & FC_RPORT_ROLE_FCP_TARGET) && | |
1310 | (fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE))) { | |
1311 | ||
1312 | /* search for a matching consistent binding */ | |
1313 | ||
1314 | spin_lock_irqsave(shost->host_lock, flags); | |
1315 | ||
1316 | list_for_each_entry(rport, &fc_host_rport_bindings(shost), | |
1317 | peers) { | |
1318 | if (rport->channel != channel) | |
1319 | continue; | |
1320 | ||
1321 | switch (fc_host_tgtid_bind_type(shost)) { | |
1322 | case FC_TGTID_BIND_BY_WWPN: | |
1323 | if (rport->port_name == ids->port_name) | |
1324 | match = 1; | |
1325 | break; | |
1326 | case FC_TGTID_BIND_BY_WWNN: | |
1327 | if (rport->node_name == ids->node_name) | |
1328 | match = 1; | |
1329 | break; | |
1330 | case FC_TGTID_BIND_BY_ID: | |
1331 | if (rport->port_id == ids->port_id) | |
1332 | match = 1; | |
1333 | break; | |
1334 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
1335 | break; | |
1336 | } | |
1337 | ||
1338 | if (match) { | |
1339 | list_move_tail(&rport->peers, | |
1340 | &fc_host_rports(shost)); | |
1341 | break; | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1346 | ||
1347 | if (match) { | |
1348 | memcpy(&rport->node_name, &ids->node_name, | |
1349 | sizeof(rport->node_name)); | |
1350 | memcpy(&rport->port_name, &ids->port_name, | |
1351 | sizeof(rport->port_name)); | |
1352 | rport->port_id = ids->port_id; | |
1353 | rport->roles = ids->roles; | |
1354 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1355 | ||
1356 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1357 | /* initiate a scan of the target */ | |
1358 | scsi_queue_work(shost, &rport->scan_work); | |
1359 | ||
1360 | return rport; | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | /* No consistent binding found - create new remote port entry */ | |
1365 | rport = fc_rport_create(shost, channel, ids); | |
1366 | ||
1367 | return rport; | |
1368 | } | |
1369 | EXPORT_SYMBOL(fc_remote_port_add); | |
1370 | ||
1371 | /* | |
1372 | * fc_rport_tgt_remove - Removes the scsi target on the remote port | |
1373 | * @rport: The remote port to be operated on | |
1374 | */ | |
1375 | static void | |
1376 | fc_rport_tgt_remove(struct fc_rport *rport) | |
1377 | { | |
1378 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1379 | ||
1380 | scsi_target_unblock(&rport->dev); | |
1381 | ||
1382 | /* Stop anything on the workq */ | |
1383 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
1384 | flush_scheduled_work(); | |
1385 | scsi_flush_work(shost); | |
1386 | ||
1387 | scsi_remove_target(&rport->dev); | |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | * fc_rport_terminate - this routine tears down and deallocates a remote port. | |
1392 | * @rport: The remote port to be terminated | |
1393 | * | |
1394 | * Notes: | |
1395 | * This routine assumes no locks are held on entry. | |
1396 | */ | |
1397 | static void | |
1398 | fc_rport_terminate(struct fc_rport *rport) | |
1399 | { | |
1400 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1401 | struct device *dev = &rport->dev; | |
1402 | unsigned long flags; | |
1403 | ||
1404 | fc_rport_tgt_remove(rport); | |
1405 | ||
1406 | transport_remove_device(dev); | |
1407 | device_del(dev); | |
1408 | transport_destroy_device(dev); | |
1409 | spin_lock_irqsave(shost->host_lock, flags); | |
1410 | list_del(&rport->peers); | |
1411 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1412 | put_device(&shost->shost_gendev); | |
1413 | } | |
1414 | ||
1415 | /** | |
1416 | * fc_remote_port_delete - notifies the fc transport that a remote | |
1417 | * port is no longer in existence. | |
1418 | * @rport: The remote port that no longer exists | |
1419 | * | |
1420 | * The LLDD calls this routine to notify the transport that a remote | |
1421 | * port is no longer part of the topology. Note: Although a port | |
1422 | * may no longer be part of the topology, it may persist in the remote | |
1423 | * ports displayed by the fc_host. This is done so that target id | |
1424 | * mappings (managed via the remote port structures), are always visible | |
1425 | * as long as the mapping is valid, regardless of port state, | |
1426 | * | |
1427 | * If the remote port is not an FCP Target, it will be fully torn down | |
1428 | * and deallocated, including the fc_remote_port class device. | |
1429 | * | |
1430 | * If the remote port is an FCP Target, the port structure will be | |
1431 | * marked as Not Present, but will remain as long as there is a valid | |
1432 | * SCSI target id mapping associated with the port structure. Validity | |
1433 | * is determined by the binding type. If binding by wwpn, then the port | |
1434 | * structure is always valid and will not be deallocated until the host | |
1435 | * is removed. If binding by wwnn, then the port structure is valid | |
1436 | * until another port with the same node name is found in the topology. | |
1437 | * If binding by port id (fc address), then the port structure is valid | |
1438 | * valid until another port with the same address is identified. | |
1439 | * | |
1440 | * Called from interrupt or normal process context. | |
1441 | * | |
1442 | * Notes: | |
1443 | * This routine assumes no locks are held on entry. | |
1444 | **/ | |
1445 | void | |
1446 | fc_remote_port_delete(struct fc_rport *rport) | |
1447 | { | |
1448 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1449 | unsigned long flags; | |
1450 | ||
1451 | /* If no scsi target id mapping or consistent binding type, delete it */ | |
1452 | if ((rport->scsi_target_id == -1) || | |
1453 | (fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE)) { | |
1454 | fc_rport_terminate(rport); | |
1455 | return; | |
1456 | } | |
1457 | ||
1458 | fc_rport_tgt_remove(rport); | |
1459 | ||
1460 | spin_lock_irqsave(shost->host_lock, flags); | |
1461 | list_move_tail(&rport->peers, &fc_host_rport_bindings(shost)); | |
1462 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1463 | ||
1464 | /* | |
1465 | * Note: We do not remove or clear the hostdata area. This allows | |
1466 | * host-specific target data to persist along with the | |
1467 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1468 | */ | |
1469 | ||
1470 | /* | |
1471 | * Reinitialize port attributes that may change if the port comes back. | |
1472 | */ | |
1473 | rport->maxframe_size = -1; | |
1474 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1475 | rport->roles = FC_RPORT_ROLE_UNKNOWN; | |
1476 | rport->port_state = FC_PORTSTATE_NOTPRESENT; | |
1477 | ||
1478 | /* remove the identifiers that aren't used in the consisting binding */ | |
1479 | switch (fc_host_tgtid_bind_type(shost)) { | |
1480 | case FC_TGTID_BIND_BY_WWPN: | |
1481 | rport->node_name = -1; | |
1482 | rport->port_id = -1; | |
1483 | break; | |
1484 | case FC_TGTID_BIND_BY_WWNN: | |
1485 | rport->port_name = -1; | |
1486 | rport->port_id = -1; | |
1487 | break; | |
1488 | case FC_TGTID_BIND_BY_ID: | |
1489 | rport->node_name = -1; | |
1490 | rport->port_name = -1; | |
1491 | break; | |
1492 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
1493 | break; | |
1494 | } | |
1495 | } | |
1496 | EXPORT_SYMBOL(fc_remote_port_delete); | |
1497 | ||
1498 | /** | |
1499 | * fc_remote_port_rolechg - notifies the fc transport that the roles | |
1500 | * on a remote may have changed. | |
1501 | * @rport: The remote port that changed. | |
1502 | * | |
1503 | * The LLDD calls this routine to notify the transport that the roles | |
1504 | * on a remote port may have changed. The largest effect of this is | |
1505 | * if a port now becomes a FCP Target, it must be allocated a | |
1506 | * scsi target id. If the port is no longer a FCP target, any | |
1507 | * scsi target id value assigned to it will persist in case the | |
1508 | * role changes back to include FCP Target. No changes in the scsi | |
1509 | * midlayer will be invoked if the role changes (in the expectation | |
1510 | * that the role will be resumed. If it doesn't normal error processing | |
1511 | * will take place). | |
1512 | * | |
1513 | * Should not be called from interrupt context. | |
1514 | * | |
1515 | * Notes: | |
1516 | * This routine assumes no locks are held on entry. | |
1517 | **/ | |
1518 | void | |
1519 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
1520 | { | |
1521 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1522 | struct fc_host_attrs *fc_host = | |
1523 | (struct fc_host_attrs *)shost->shost_data; | |
1524 | unsigned long flags; | |
1525 | int create = 0; | |
1526 | ||
1527 | rport->roles = roles; | |
1528 | ||
1529 | spin_lock_irqsave(shost->host_lock, flags); | |
1530 | if ((rport->scsi_target_id == -1) && | |
1531 | (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { | |
1532 | rport->scsi_target_id = fc_host->next_target_id++; | |
1533 | create = 1; | |
1534 | } | |
1535 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1536 | ||
1537 | if (create) | |
1538 | /* initiate a scan of the target */ | |
1539 | scsi_queue_work(shost, &rport->scan_work); | |
1540 | } | |
1541 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
1542 | ||
1543 | /** | |
1544 | * fc_timeout_blocked_rport - Timeout handler for blocked remote port | |
1545 | * that fails to return in the alloted time. | |
1546 | * @data: scsi target that failed to reappear in the alloted time. | |
1547 | **/ | |
1548 | static void | |
1549 | fc_timeout_blocked_rport(void *data) | |
1550 | { | |
1551 | struct fc_rport *rport = (struct fc_rport *)data; | |
1552 | ||
1553 | rport->port_state = FC_PORTSTATE_OFFLINE; | |
1554 | ||
1555 | dev_printk(KERN_ERR, &rport->dev, | |
1556 | "blocked FC remote port time out: removing target\n"); | |
1557 | ||
1558 | /* | |
1559 | * As this only occurs if the remote port (scsi target) | |
1560 | * went away and didn't come back - we'll remove | |
1561 | * all attached scsi devices. | |
1562 | */ | |
1563 | scsi_target_unblock(&rport->dev); | |
1564 | scsi_remove_target(&rport->dev); | |
1565 | } | |
1566 | ||
1567 | /** | |
1568 | * fc_remote_port_block - temporarily block any scsi traffic to a remote port. | |
1569 | * @rport: remote port to be blocked. | |
1570 | * | |
1571 | * scsi lldd's with a FC transport call this routine to temporarily stop | |
1572 | * all scsi traffic to a remote port. If the port is not a SCSI target, | |
1573 | * no action is taken. If the port is a SCSI target, all attached devices | |
1574 | * are placed into a SDEV_BLOCK state and a timer is started. The timer is | |
1575 | * represents the maximum amount of time the port may be blocked. If the | |
1576 | * timer expires, the port is considered non-existent and the attached | |
1577 | * scsi devices will be removed. | |
1578 | * | |
1579 | * Called from interrupt or normal process context. | |
1580 | * | |
1581 | * Returns zero if successful or error if not | |
1582 | * | |
1583 | * Notes: | |
1584 | * This routine assumes no locks are held on entry. | |
1585 | * | |
1586 | * The timeout and timer types are extracted from the fc transport | |
1587 | * attributes from the caller's rport pointer. | |
1588 | **/ | |
1589 | int | |
1590 | fc_remote_port_block(struct fc_rport *rport) | |
1591 | { | |
1592 | int timeout = rport->dev_loss_tmo; | |
1593 | struct work_struct *work = &rport->dev_loss_work; | |
1594 | ||
1595 | if (timeout < 0 || timeout > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) | |
1596 | return -EINVAL; | |
1597 | ||
1598 | scsi_target_block(&rport->dev); | |
1599 | ||
1600 | /* cap the length the devices can be blocked */ | |
1601 | schedule_delayed_work(work, timeout * HZ); | |
1602 | ||
1603 | rport->port_state = FC_PORTSTATE_BLOCKED; | |
1604 | return 0; | |
1605 | } | |
1606 | EXPORT_SYMBOL(fc_remote_port_block); | |
1607 | ||
1608 | /** | |
1609 | * fc_remote_port_unblock - restart any blocked scsi traffic to a remote port. | |
1610 | * @rport: remote port to be unblocked. | |
1611 | * | |
1612 | * scsi lld's with a FC transport call this routine to restart IO to all | |
1613 | * devices associated with the caller's scsi target following a fc_target_block | |
1614 | * request. Called from interrupt or normal process context. | |
1615 | * | |
1616 | * Notes: | |
1617 | * This routine assumes no locks are held on entry. | |
1618 | **/ | |
1619 | void | |
1620 | fc_remote_port_unblock(struct fc_rport *rport) | |
1621 | { | |
1622 | struct work_struct *work = &rport->dev_loss_work; | |
1623 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1624 | ||
1625 | /* | |
1626 | * Stop the target timer first. Take no action on the del_timer | |
1627 | * failure as the state machine state change will validate the | |
1628 | * transaction. | |
1629 | */ | |
1630 | if (!cancel_delayed_work(work)) | |
1631 | flush_scheduled_work(); | |
1632 | ||
1633 | if (rport->port_state == FC_PORTSTATE_OFFLINE) | |
1634 | /* | |
1635 | * initiate a scan of the target as the target has | |
1636 | * been torn down. | |
1637 | */ | |
1638 | scsi_queue_work(shost, &rport->scan_work); | |
1639 | else | |
1640 | scsi_target_unblock(&rport->dev); | |
1641 | ||
1642 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1643 | } | |
1644 | EXPORT_SYMBOL(fc_remote_port_unblock); | |
1645 | ||
1646 | /** | |
1647 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
1648 | * @data: remote port to be scanned. | |
1649 | **/ | |
1650 | static void | |
1651 | fc_scsi_scan_rport(void *data) | |
1652 | { | |
1653 | struct fc_rport *rport = (struct fc_rport *)data; | |
1654 | ||
1655 | scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id, | |
1656 | SCAN_WILD_CARD, 1); | |
1657 | } | |
1658 | ||
1659 | ||
1660 | MODULE_AUTHOR("Martin Hicks"); | |
1661 | MODULE_DESCRIPTION("FC Transport Attributes"); | |
1662 | MODULE_LICENSE("GPL"); | |
1663 | ||
1664 | module_init(fc_transport_init); | |
1665 | module_exit(fc_transport_exit); |