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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 | ||
d0a7e574 JB |
255 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
256 | struct class_device *cdev) | |
1da177e4 LT |
257 | { |
258 | struct scsi_target *starget = to_scsi_target(dev); | |
259 | struct fc_rport *rport = starget_to_rport(starget); | |
260 | ||
261 | /* | |
262 | * if parent is remote port, use values from remote port. | |
263 | * Otherwise, this host uses the fc_transport, but not the | |
264 | * remote port interface. As such, initialize to known non-values. | |
265 | */ | |
266 | if (rport) { | |
267 | fc_starget_node_name(starget) = rport->node_name; | |
268 | fc_starget_port_name(starget) = rport->port_name; | |
269 | fc_starget_port_id(starget) = rport->port_id; | |
270 | } else { | |
271 | fc_starget_node_name(starget) = -1; | |
272 | fc_starget_port_name(starget) = -1; | |
273 | fc_starget_port_id(starget) = -1; | |
274 | } | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
280 | "fc_transport", | |
281 | fc_target_setup, | |
282 | NULL, | |
283 | NULL); | |
284 | ||
d0a7e574 JB |
285 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
286 | struct class_device *cdev) | |
1da177e4 LT |
287 | { |
288 | struct Scsi_Host *shost = dev_to_shost(dev); | |
289 | ||
290 | /* | |
291 | * Set default values easily detected by the midlayer as | |
292 | * failure cases. The scsi lldd is responsible for initializing | |
293 | * all transport attributes to valid values per host. | |
294 | */ | |
295 | fc_host_node_name(shost) = -1; | |
296 | fc_host_port_name(shost) = -1; | |
297 | fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED; | |
298 | memset(fc_host_supported_fc4s(shost), 0, | |
299 | sizeof(fc_host_supported_fc4s(shost))); | |
300 | memset(fc_host_symbolic_name(shost), 0, | |
301 | sizeof(fc_host_symbolic_name(shost))); | |
302 | fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN; | |
303 | fc_host_maxframe_size(shost) = -1; | |
304 | memset(fc_host_serial_number(shost), 0, | |
305 | sizeof(fc_host_serial_number(shost))); | |
306 | ||
307 | fc_host_port_id(shost) = -1; | |
308 | fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; | |
309 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
310 | memset(fc_host_active_fc4s(shost), 0, | |
311 | sizeof(fc_host_active_fc4s(shost))); | |
312 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
313 | fc_host_fabric_name(shost) = -1; | |
314 | ||
315 | fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN; | |
316 | ||
317 | INIT_LIST_HEAD(&fc_host_rports(shost)); | |
318 | INIT_LIST_HEAD(&fc_host_rport_bindings(shost)); | |
319 | fc_host_next_rport_number(shost) = 0; | |
320 | fc_host_next_target_id(shost) = 0; | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
326 | "fc_host", | |
327 | fc_host_setup, | |
328 | NULL, | |
329 | NULL); | |
330 | ||
331 | /* | |
332 | * Setup and Remove actions for remote ports are handled | |
333 | * in the service functions below. | |
334 | */ | |
335 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
336 | "fc_remote_ports", | |
337 | NULL, | |
338 | NULL, | |
339 | NULL); | |
340 | ||
341 | /* | |
342 | * Module Parameters | |
343 | */ | |
344 | ||
345 | /* | |
346 | * dev_loss_tmo: the default number of seconds that the FC transport | |
347 | * should insulate the loss of a remote port. | |
348 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
349 | */ | |
350 | static unsigned int fc_dev_loss_tmo = SCSI_DEVICE_BLOCK_MAX_TIMEOUT; | |
351 | ||
352 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR); | |
353 | MODULE_PARM_DESC(dev_loss_tmo, | |
354 | "Maximum number of seconds that the FC transport should" | |
355 | " insulate the loss of a remote port. Once this value is" | |
356 | " exceeded, the scsi target is removed. Value should be" | |
357 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); | |
358 | ||
359 | ||
360 | static __init int fc_transport_init(void) | |
361 | { | |
362 | int error = transport_class_register(&fc_host_class); | |
363 | if (error) | |
364 | return error; | |
365 | error = transport_class_register(&fc_rport_class); | |
366 | if (error) | |
367 | return error; | |
368 | return transport_class_register(&fc_transport_class); | |
369 | } | |
370 | ||
371 | static void __exit fc_transport_exit(void) | |
372 | { | |
373 | transport_class_unregister(&fc_transport_class); | |
374 | transport_class_unregister(&fc_rport_class); | |
375 | transport_class_unregister(&fc_host_class); | |
376 | } | |
377 | ||
378 | /* | |
379 | * FC Remote Port Attribute Management | |
380 | */ | |
381 | ||
382 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
383 | static ssize_t \ | |
384 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
385 | { \ | |
386 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
387 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
388 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
389 | if (i->f->get_rport_##field) \ | |
390 | i->f->get_rport_##field(rport); \ | |
391 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
392 | } | |
393 | ||
394 | #define fc_rport_store_function(field) \ | |
395 | static ssize_t \ | |
396 | store_fc_rport_##field(struct class_device *cdev, const char *buf, \ | |
397 | size_t count) \ | |
398 | { \ | |
399 | int val; \ | |
400 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
401 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
402 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
403 | val = simple_strtoul(buf, NULL, 0); \ | |
404 | i->f->set_rport_##field(rport, val); \ | |
405 | return count; \ | |
406 | } | |
407 | ||
408 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
409 | fc_rport_show_function(field, format_string, sz, ) \ | |
410 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
411 | show_fc_rport_##field, NULL) | |
412 | ||
413 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
414 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
415 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
416 | show_fc_rport_##field, NULL) | |
417 | ||
418 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
419 | fc_rport_show_function(field, format_string, sz, ) \ | |
420 | fc_rport_store_function(field) \ | |
421 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ | |
422 | show_fc_rport_##field, \ | |
423 | store_fc_rport_##field) | |
424 | ||
425 | ||
426 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
427 | static ssize_t \ | |
428 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
429 | { \ | |
430 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
431 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
432 | } | |
433 | ||
434 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
435 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
436 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
437 | show_fc_rport_##field, NULL) | |
438 | ||
439 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
440 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
441 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
442 | show_fc_rport_##field, NULL) | |
443 | ||
444 | ||
445 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
446 | static ssize_t \ | |
447 | show_fc_rport_##title (struct class_device *cdev, char *buf) \ | |
448 | { \ | |
449 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
450 | const char *name; \ | |
451 | name = get_fc_##title##_name(rport->title); \ | |
452 | if (!name) \ | |
453 | return -EINVAL; \ | |
454 | return snprintf(buf, maxlen, "%s\n", name); \ | |
455 | } \ | |
456 | static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \ | |
457 | show_fc_rport_##title, NULL) | |
458 | ||
459 | ||
460 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
461 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
462 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
463 | i->private_rport_attrs[count].store = NULL; \ | |
464 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
465 | if (i->f->show_rport_##field) \ | |
466 | count++ | |
467 | ||
468 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
469 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
470 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
471 | i->private_rport_attrs[count].store = NULL; \ | |
472 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
473 | count++ | |
474 | ||
475 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
476 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
477 | if (!i->f->set_rport_##field) { \ | |
478 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
479 | i->private_rport_attrs[count].store = NULL; \ | |
480 | } \ | |
481 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
482 | if (i->f->show_rport_##field) \ | |
483 | count++ | |
484 | ||
485 | ||
486 | /* The FC Transport Remote Port Attributes: */ | |
487 | ||
488 | /* Fixed Remote Port Attributes */ | |
489 | ||
490 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
491 | ||
492 | static ssize_t | |
493 | show_fc_rport_supported_classes (struct class_device *cdev, char *buf) | |
494 | { | |
495 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
496 | if (rport->supported_classes == FC_COS_UNSPECIFIED) | |
497 | return snprintf(buf, 20, "unspecified\n"); | |
498 | return get_fc_cos_names(rport->supported_classes, buf); | |
499 | } | |
500 | static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO, | |
501 | show_fc_rport_supported_classes, NULL); | |
502 | ||
503 | /* Dynamic Remote Port Attributes */ | |
504 | ||
505 | fc_rport_rw_attr(dev_loss_tmo, "%d\n", 20); | |
506 | ||
507 | ||
508 | /* Private Remote Port Attributes */ | |
509 | ||
510 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
511 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
512 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
513 | ||
514 | static ssize_t | |
515 | show_fc_rport_roles (struct class_device *cdev, char *buf) | |
516 | { | |
517 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
518 | ||
519 | /* identify any roles that are port_id specific */ | |
520 | if ((rport->port_id != -1) && | |
521 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
522 | FC_WELLKNOWN_PORTID_MASK) { | |
523 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
524 | case FC_FPORT_PORTID: | |
525 | return snprintf(buf, 30, "Fabric Port\n"); | |
526 | case FC_FABCTLR_PORTID: | |
527 | return snprintf(buf, 30, "Fabric Controller\n"); | |
528 | case FC_DIRSRVR_PORTID: | |
529 | return snprintf(buf, 30, "Directory Server\n"); | |
530 | case FC_TIMESRVR_PORTID: | |
531 | return snprintf(buf, 30, "Time Server\n"); | |
532 | case FC_MGMTSRVR_PORTID: | |
533 | return snprintf(buf, 30, "Management Server\n"); | |
534 | default: | |
535 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
536 | } | |
537 | } else { | |
538 | if (rport->roles == FC_RPORT_ROLE_UNKNOWN) | |
539 | return snprintf(buf, 20, "unknown\n"); | |
540 | return get_fc_remote_port_roles_names(rport->roles, buf); | |
541 | } | |
542 | } | |
543 | static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO, | |
544 | show_fc_rport_roles, NULL); | |
545 | ||
546 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
547 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
548 | ||
549 | ||
550 | ||
551 | /* | |
552 | * FC SCSI Target Attribute Management | |
553 | */ | |
554 | ||
555 | /* | |
556 | * Note: in the target show function we recognize when the remote | |
557 | * port is in the heirarchy and do not allow the driver to get | |
558 | * involved in sysfs functions. The driver only gets involved if | |
559 | * it's the "old" style that doesn't use rports. | |
560 | */ | |
561 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
562 | static ssize_t \ | |
563 | show_fc_starget_##field (struct class_device *cdev, char *buf) \ | |
564 | { \ | |
565 | struct scsi_target *starget = transport_class_to_starget(cdev); \ | |
566 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ | |
567 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
568 | struct fc_rport *rport = starget_to_rport(starget); \ | |
569 | if (rport) \ | |
570 | fc_starget_##field(starget) = rport->field; \ | |
571 | else if (i->f->get_starget_##field) \ | |
572 | i->f->get_starget_##field(starget); \ | |
573 | return snprintf(buf, sz, format_string, \ | |
574 | cast fc_starget_##field(starget)); \ | |
575 | } | |
576 | ||
577 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
578 | fc_starget_show_function(field, format_string, sz, ) \ | |
579 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
580 | show_fc_starget_##field, NULL) | |
581 | ||
582 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
583 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
584 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
585 | show_fc_starget_##field, NULL) | |
586 | ||
587 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
588 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
589 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
590 | i->private_starget_attrs[count].store = NULL; \ | |
591 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
592 | if (i->f->show_starget_##field) \ | |
593 | count++ | |
594 | ||
595 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
596 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
597 | if (!i->f->set_starget_##field) { \ | |
598 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
599 | i->private_starget_attrs[count].store = NULL; \ | |
600 | } \ | |
601 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
602 | if (i->f->show_starget_##field) \ | |
603 | count++ | |
604 | ||
605 | /* The FC Transport SCSI Target Attributes: */ | |
606 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
607 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
608 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
609 | ||
610 | ||
611 | /* | |
612 | * Host Attribute Management | |
613 | */ | |
614 | ||
615 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
616 | static ssize_t \ | |
617 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
618 | { \ | |
619 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
620 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
621 | if (i->f->get_host_##field) \ | |
622 | i->f->get_host_##field(shost); \ | |
623 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
624 | } | |
625 | ||
626 | #define fc_host_store_function(field) \ | |
627 | static ssize_t \ | |
628 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
629 | size_t count) \ | |
630 | { \ | |
631 | int val; \ | |
632 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
633 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
634 | \ | |
635 | val = simple_strtoul(buf, NULL, 0); \ | |
636 | i->f->set_host_##field(shost, val); \ | |
637 | return count; \ | |
638 | } | |
639 | ||
640 | #define fc_host_rd_attr(field, format_string, sz) \ | |
641 | fc_host_show_function(field, format_string, sz, ) \ | |
642 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
643 | show_fc_host_##field, NULL) | |
644 | ||
645 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
646 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
647 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
648 | show_fc_host_##field, NULL) | |
649 | ||
650 | #define fc_host_rw_attr(field, format_string, sz) \ | |
651 | fc_host_show_function(field, format_string, sz, ) \ | |
652 | fc_host_store_function(field) \ | |
653 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ | |
654 | show_fc_host_##field, \ | |
655 | store_fc_host_##field) | |
656 | ||
657 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
658 | static ssize_t \ | |
659 | show_fc_host_##title (struct class_device *cdev, char *buf) \ | |
660 | { \ | |
661 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
662 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
663 | const char *name; \ | |
664 | if (i->f->get_host_##title) \ | |
665 | i->f->get_host_##title(shost); \ | |
666 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
667 | if (!name) \ | |
668 | return -EINVAL; \ | |
669 | return snprintf(buf, maxlen, "%s\n", name); \ | |
670 | } \ | |
671 | static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) | |
672 | ||
673 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
674 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
675 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
676 | i->private_host_attrs[count].store = NULL; \ | |
677 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
678 | if (i->f->show_host_##field) \ | |
679 | count++ | |
680 | ||
681 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ | |
682 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
683 | if (!i->f->set_host_##field) { \ | |
684 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
685 | i->private_host_attrs[count].store = NULL; \ | |
686 | } \ | |
687 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
688 | if (i->f->show_host_##field) \ | |
689 | count++ | |
690 | ||
691 | ||
692 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
693 | static ssize_t \ | |
694 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
695 | { \ | |
696 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
697 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
698 | } | |
699 | ||
700 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
701 | fc_private_host_show_function(field, format_string, sz, ) \ | |
702 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
703 | show_fc_host_##field, NULL) | |
704 | ||
705 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
706 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
707 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
708 | show_fc_host_##field, NULL) | |
709 | ||
710 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
711 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
712 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
713 | i->private_host_attrs[count].store = NULL; \ | |
714 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
715 | count++ | |
716 | ||
717 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
718 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
719 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
720 | count++ | |
721 | ||
722 | ||
723 | /* Fixed Host Attributes */ | |
724 | ||
725 | static ssize_t | |
726 | show_fc_host_supported_classes (struct class_device *cdev, char *buf) | |
727 | { | |
728 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
729 | ||
730 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
731 | return snprintf(buf, 20, "unspecified\n"); | |
732 | ||
733 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
734 | } | |
735 | static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, | |
736 | show_fc_host_supported_classes, NULL); | |
737 | ||
738 | static ssize_t | |
739 | show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) | |
740 | { | |
741 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
742 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); | |
743 | } | |
744 | static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, | |
745 | show_fc_host_supported_fc4s, NULL); | |
746 | ||
747 | static ssize_t | |
748 | show_fc_host_supported_speeds (struct class_device *cdev, char *buf) | |
749 | { | |
750 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
751 | ||
752 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
753 | return snprintf(buf, 20, "unknown\n"); | |
754 | ||
755 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
756 | } | |
757 | static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, | |
758 | show_fc_host_supported_speeds, NULL); | |
759 | ||
760 | ||
761 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
762 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
763 | fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1)); | |
764 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); | |
765 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); | |
766 | ||
767 | ||
768 | /* Dynamic Host Attributes */ | |
769 | ||
770 | static ssize_t | |
771 | show_fc_host_active_fc4s (struct class_device *cdev, char *buf) | |
772 | { | |
773 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
774 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
775 | ||
776 | if (i->f->get_host_active_fc4s) | |
777 | i->f->get_host_active_fc4s(shost); | |
778 | ||
779 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
780 | } | |
781 | static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, | |
782 | show_fc_host_active_fc4s, NULL); | |
783 | ||
784 | static ssize_t | |
785 | show_fc_host_speed (struct class_device *cdev, char *buf) | |
786 | { | |
787 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
788 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
789 | ||
790 | if (i->f->get_host_speed) | |
791 | i->f->get_host_speed(shost); | |
792 | ||
793 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
794 | return snprintf(buf, 20, "unknown\n"); | |
795 | ||
796 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
797 | } | |
798 | static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, | |
799 | show_fc_host_speed, NULL); | |
800 | ||
801 | ||
802 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
803 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
804 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
805 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
806 | ||
807 | ||
808 | /* Private Host Attributes */ | |
809 | ||
810 | static ssize_t | |
811 | show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) | |
812 | { | |
813 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
814 | const char *name; | |
815 | ||
816 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
817 | if (!name) | |
818 | return -EINVAL; | |
819 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
820 | } | |
821 | ||
d16794f6 JSEC |
822 | #define get_list_head_entry(pos, head, member) \ |
823 | pos = list_entry((head)->next, typeof(*pos), member) | |
824 | ||
1da177e4 LT |
825 | static ssize_t |
826 | store_fc_private_host_tgtid_bind_type(struct class_device *cdev, | |
827 | const char *buf, size_t count) | |
828 | { | |
829 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
d16794f6 | 830 | struct fc_rport *rport; |
1da177e4 LT |
831 | enum fc_tgtid_binding_type val; |
832 | unsigned long flags; | |
833 | ||
834 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
835 | return -EINVAL; | |
836 | ||
837 | /* if changing bind type, purge all unused consistent bindings */ | |
838 | if (val != fc_host_tgtid_bind_type(shost)) { | |
839 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
840 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
841 | get_list_head_entry(rport, | |
842 | &fc_host_rport_bindings(shost), peers); | |
843 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 | 844 | fc_rport_terminate(rport); |
d16794f6 JSEC |
845 | spin_lock_irqsave(shost->host_lock, flags); |
846 | } | |
1da177e4 LT |
847 | spin_unlock_irqrestore(shost->host_lock, flags); |
848 | } | |
849 | ||
850 | fc_host_tgtid_bind_type(shost) = val; | |
851 | return count; | |
852 | } | |
853 | ||
854 | static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, | |
855 | show_fc_private_host_tgtid_bind_type, | |
856 | store_fc_private_host_tgtid_bind_type); | |
857 | ||
858 | /* | |
859 | * Host Statistics Management | |
860 | */ | |
861 | ||
862 | /* Show a given an attribute in the statistics group */ | |
863 | static ssize_t | |
864 | fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) | |
865 | { | |
866 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
867 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
868 | struct fc_host_statistics *stats; | |
869 | ssize_t ret = -ENOENT; | |
870 | ||
871 | if (offset > sizeof(struct fc_host_statistics) || | |
872 | offset % sizeof(u64) != 0) | |
873 | WARN_ON(1); | |
874 | ||
875 | if (i->f->get_fc_host_stats) { | |
876 | stats = (i->f->get_fc_host_stats)(shost); | |
877 | if (stats) | |
878 | ret = snprintf(buf, 20, "0x%llx\n", | |
879 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
880 | } | |
881 | return ret; | |
882 | } | |
883 | ||
884 | ||
885 | /* generate a read-only statistics attribute */ | |
886 | #define fc_host_statistic(name) \ | |
887 | static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ | |
888 | { \ | |
889 | return fc_stat_show(cd, buf, \ | |
890 | offsetof(struct fc_host_statistics, name)); \ | |
891 | } \ | |
892 | static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) | |
893 | ||
894 | fc_host_statistic(seconds_since_last_reset); | |
895 | fc_host_statistic(tx_frames); | |
896 | fc_host_statistic(tx_words); | |
897 | fc_host_statistic(rx_frames); | |
898 | fc_host_statistic(rx_words); | |
899 | fc_host_statistic(lip_count); | |
900 | fc_host_statistic(nos_count); | |
901 | fc_host_statistic(error_frames); | |
902 | fc_host_statistic(dumped_frames); | |
903 | fc_host_statistic(link_failure_count); | |
904 | fc_host_statistic(loss_of_sync_count); | |
905 | fc_host_statistic(loss_of_signal_count); | |
906 | fc_host_statistic(prim_seq_protocol_err_count); | |
907 | fc_host_statistic(invalid_tx_word_count); | |
908 | fc_host_statistic(invalid_crc_count); | |
909 | fc_host_statistic(fcp_input_requests); | |
910 | fc_host_statistic(fcp_output_requests); | |
911 | fc_host_statistic(fcp_control_requests); | |
912 | fc_host_statistic(fcp_input_megabytes); | |
913 | fc_host_statistic(fcp_output_megabytes); | |
914 | ||
915 | static ssize_t | |
916 | fc_reset_statistics(struct class_device *cdev, const char *buf, | |
917 | size_t count) | |
918 | { | |
919 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
920 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
921 | ||
922 | /* ignore any data value written to the attribute */ | |
923 | if (i->f->reset_fc_host_stats) { | |
924 | i->f->reset_fc_host_stats(shost); | |
925 | return count; | |
926 | } | |
927 | ||
928 | return -ENOENT; | |
929 | } | |
930 | static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, | |
931 | fc_reset_statistics); | |
932 | ||
933 | ||
934 | static struct attribute *fc_statistics_attrs[] = { | |
935 | &class_device_attr_host_seconds_since_last_reset.attr, | |
936 | &class_device_attr_host_tx_frames.attr, | |
937 | &class_device_attr_host_tx_words.attr, | |
938 | &class_device_attr_host_rx_frames.attr, | |
939 | &class_device_attr_host_rx_words.attr, | |
940 | &class_device_attr_host_lip_count.attr, | |
941 | &class_device_attr_host_nos_count.attr, | |
942 | &class_device_attr_host_error_frames.attr, | |
943 | &class_device_attr_host_dumped_frames.attr, | |
944 | &class_device_attr_host_link_failure_count.attr, | |
945 | &class_device_attr_host_loss_of_sync_count.attr, | |
946 | &class_device_attr_host_loss_of_signal_count.attr, | |
947 | &class_device_attr_host_prim_seq_protocol_err_count.attr, | |
948 | &class_device_attr_host_invalid_tx_word_count.attr, | |
949 | &class_device_attr_host_invalid_crc_count.attr, | |
950 | &class_device_attr_host_fcp_input_requests.attr, | |
951 | &class_device_attr_host_fcp_output_requests.attr, | |
952 | &class_device_attr_host_fcp_control_requests.attr, | |
953 | &class_device_attr_host_fcp_input_megabytes.attr, | |
954 | &class_device_attr_host_fcp_output_megabytes.attr, | |
955 | &class_device_attr_host_reset_statistics.attr, | |
956 | NULL | |
957 | }; | |
958 | ||
959 | static struct attribute_group fc_statistics_group = { | |
960 | .name = "statistics", | |
961 | .attrs = fc_statistics_attrs, | |
962 | }; | |
963 | ||
964 | static int fc_host_match(struct attribute_container *cont, | |
965 | struct device *dev) | |
966 | { | |
967 | struct Scsi_Host *shost; | |
968 | struct fc_internal *i; | |
969 | ||
970 | if (!scsi_is_host_device(dev)) | |
971 | return 0; | |
972 | ||
973 | shost = dev_to_shost(dev); | |
974 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
975 | != &fc_host_class.class) | |
976 | return 0; | |
977 | ||
978 | i = to_fc_internal(shost->transportt); | |
979 | ||
980 | return &i->t.host_attrs.ac == cont; | |
981 | } | |
982 | ||
983 | static int fc_target_match(struct attribute_container *cont, | |
984 | struct device *dev) | |
985 | { | |
986 | struct Scsi_Host *shost; | |
987 | struct fc_internal *i; | |
988 | ||
989 | if (!scsi_is_target_device(dev)) | |
990 | return 0; | |
991 | ||
992 | shost = dev_to_shost(dev->parent); | |
993 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
994 | != &fc_host_class.class) | |
995 | return 0; | |
996 | ||
997 | i = to_fc_internal(shost->transportt); | |
998 | ||
999 | return &i->t.target_attrs.ac == cont; | |
1000 | } | |
1001 | ||
1002 | static void fc_rport_dev_release(struct device *dev) | |
1003 | { | |
1004 | struct fc_rport *rport = dev_to_rport(dev); | |
1005 | put_device(dev->parent); | |
1006 | kfree(rport); | |
1007 | } | |
1008 | ||
1009 | int scsi_is_fc_rport(const struct device *dev) | |
1010 | { | |
1011 | return dev->release == fc_rport_dev_release; | |
1012 | } | |
1013 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1014 | ||
1015 | static int fc_rport_match(struct attribute_container *cont, | |
1016 | struct device *dev) | |
1017 | { | |
1018 | struct Scsi_Host *shost; | |
1019 | struct fc_internal *i; | |
1020 | ||
1021 | if (!scsi_is_fc_rport(dev)) | |
1022 | return 0; | |
1023 | ||
1024 | shost = dev_to_shost(dev->parent); | |
1025 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1026 | != &fc_host_class.class) | |
1027 | return 0; | |
1028 | ||
1029 | i = to_fc_internal(shost->transportt); | |
1030 | ||
1031 | return &i->rport_attr_cont.ac == cont; | |
1032 | } | |
1033 | ||
5c44cd2a JSEC |
1034 | |
1035 | /* | |
1036 | * Must be called with shost->host_lock held | |
1037 | */ | |
1038 | static struct device *fc_target_parent(struct Scsi_Host *shost, | |
1039 | int channel, uint id) | |
1040 | { | |
1041 | struct fc_rport *rport; | |
1042 | ||
1043 | list_for_each_entry(rport, &fc_host_rports(shost), peers) | |
1044 | if ((rport->channel == channel) && | |
1045 | (rport->scsi_target_id == id)) | |
1046 | return &rport->dev; | |
1047 | ||
1048 | return NULL; | |
1049 | } | |
1050 | ||
1da177e4 LT |
1051 | struct scsi_transport_template * |
1052 | fc_attach_transport(struct fc_function_template *ft) | |
1053 | { | |
1054 | struct fc_internal *i = kmalloc(sizeof(struct fc_internal), | |
1055 | GFP_KERNEL); | |
1056 | int count; | |
1057 | ||
1058 | if (unlikely(!i)) | |
1059 | return NULL; | |
1060 | ||
1061 | memset(i, 0, sizeof(struct fc_internal)); | |
1062 | ||
1063 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; | |
1064 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
1065 | i->t.target_attrs.ac.match = fc_target_match; | |
1066 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
1067 | transport_container_register(&i->t.target_attrs); | |
1068 | ||
1069 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1070 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
1071 | i->t.host_attrs.ac.match = fc_host_match; | |
1072 | i->t.host_size = sizeof(struct fc_host_attrs); | |
1073 | if (ft->get_fc_host_stats) | |
1074 | i->t.host_attrs.statistics = &fc_statistics_group; | |
1075 | transport_container_register(&i->t.host_attrs); | |
1076 | ||
1077 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
1078 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
1079 | i->rport_attr_cont.ac.match = fc_rport_match; | |
1080 | transport_container_register(&i->rport_attr_cont); | |
1081 | ||
1082 | i->f = ft; | |
1083 | ||
1084 | /* Transport uses the shost workq for scsi scanning */ | |
1085 | i->t.create_work_queue = 1; | |
5c44cd2a JSEC |
1086 | |
1087 | i->t.target_parent = fc_target_parent; | |
1da177e4 LT |
1088 | |
1089 | /* | |
1090 | * Setup SCSI Target Attributes. | |
1091 | */ | |
1092 | count = 0; | |
1093 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
1094 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
1095 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
1096 | ||
1097 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
1098 | ||
1099 | i->starget_attrs[count] = NULL; | |
1100 | ||
1101 | ||
1102 | /* | |
1103 | * Setup SCSI Host Attributes. | |
1104 | */ | |
1105 | count=0; | |
1106 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
1107 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
1108 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); | |
1109 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1110 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); | |
1111 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); | |
1112 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
1113 | SETUP_HOST_ATTRIBUTE_RD(serial_number); | |
1114 | ||
1115 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
1116 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
1117 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
1118 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
1119 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
1120 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
1121 | ||
1122 | /* Transport-managed attributes */ | |
1123 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); | |
1124 | ||
1125 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
1126 | ||
1127 | i->host_attrs[count] = NULL; | |
1128 | ||
1129 | /* | |
1130 | * Setup Remote Port Attributes. | |
1131 | */ | |
1132 | count=0; | |
1133 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
1134 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
1135 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
1136 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
1137 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
1138 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
1139 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
1140 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
1141 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
1142 | ||
1143 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
1144 | ||
1145 | i->rport_attrs[count] = NULL; | |
1146 | ||
1147 | return &i->t; | |
1148 | } | |
1149 | EXPORT_SYMBOL(fc_attach_transport); | |
1150 | ||
1151 | void fc_release_transport(struct scsi_transport_template *t) | |
1152 | { | |
1153 | struct fc_internal *i = to_fc_internal(t); | |
1154 | ||
1155 | transport_container_unregister(&i->t.target_attrs); | |
1156 | transport_container_unregister(&i->t.host_attrs); | |
1157 | transport_container_unregister(&i->rport_attr_cont); | |
1158 | ||
1159 | kfree(i); | |
1160 | } | |
1161 | EXPORT_SYMBOL(fc_release_transport); | |
1162 | ||
1163 | ||
1164 | /** | |
1165 | * fc_remove_host - called to terminate any fc_transport-related elements | |
1166 | * for a scsi host. | |
1167 | * @rport: remote port to be unblocked. | |
1168 | * | |
1169 | * This routine is expected to be called immediately preceeding the | |
1170 | * a driver's call to scsi_remove_host(). | |
1171 | * | |
1172 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
1173 | * this routine prior to scsi_remote_host(), will leave dangling | |
1174 | * objects in /sys/class/fc_remote_ports. Access to any of these | |
1175 | * objects can result in a system crash !!! | |
1176 | * | |
1177 | * Notes: | |
1178 | * This routine assumes no locks are held on entry. | |
1179 | **/ | |
1180 | void | |
1181 | fc_remove_host(struct Scsi_Host *shost) | |
1182 | { | |
1183 | struct fc_rport *rport, *next_rport; | |
1184 | ||
1185 | /* Remove any remote ports */ | |
1186 | list_for_each_entry_safe(rport, next_rport, | |
1187 | &fc_host_rports(shost), peers) | |
1188 | fc_rport_terminate(rport); | |
1189 | list_for_each_entry_safe(rport, next_rport, | |
1190 | &fc_host_rport_bindings(shost), peers) | |
1191 | fc_rport_terminate(rport); | |
1192 | } | |
1193 | EXPORT_SYMBOL(fc_remove_host); | |
1194 | ||
1195 | /** | |
1196 | * fc_rport_create - allocates and creates a remote FC port. | |
1197 | * @shost: scsi host the remote port is connected to. | |
1198 | * @channel: Channel on shost port connected to. | |
1199 | * @ids: The world wide names, fc address, and FC4 port | |
1200 | * roles for the remote port. | |
1201 | * | |
1202 | * Allocates and creates the remoter port structure, including the | |
1203 | * class and sysfs creation. | |
1204 | * | |
1205 | * Notes: | |
1206 | * This routine assumes no locks are held on entry. | |
1207 | **/ | |
1208 | struct fc_rport * | |
1209 | fc_rport_create(struct Scsi_Host *shost, int channel, | |
1210 | struct fc_rport_identifiers *ids) | |
1211 | { | |
1212 | struct fc_host_attrs *fc_host = | |
1213 | (struct fc_host_attrs *)shost->shost_data; | |
1214 | struct fc_internal *fci = to_fc_internal(shost->transportt); | |
1215 | struct fc_rport *rport; | |
1216 | struct device *dev; | |
1217 | unsigned long flags; | |
1218 | int error; | |
1219 | size_t size; | |
1220 | ||
1221 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
1222 | rport = kmalloc(size, GFP_KERNEL); | |
1223 | if (unlikely(!rport)) { | |
1224 | printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); | |
1225 | return NULL; | |
1226 | } | |
1227 | memset(rport, 0, size); | |
1228 | ||
1229 | rport->maxframe_size = -1; | |
1230 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1231 | rport->dev_loss_tmo = fc_dev_loss_tmo; | |
1232 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); | |
1233 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
1234 | rport->port_id = ids->port_id; | |
1235 | rport->roles = ids->roles; | |
1236 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1237 | if (fci->f->dd_fcrport_size) | |
1238 | rport->dd_data = &rport[1]; | |
1239 | rport->channel = channel; | |
1240 | ||
1241 | INIT_WORK(&rport->dev_loss_work, fc_timeout_blocked_rport, rport); | |
1242 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport); | |
1243 | ||
1244 | spin_lock_irqsave(shost->host_lock, flags); | |
1245 | ||
1246 | rport->number = fc_host->next_rport_number++; | |
1247 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1248 | rport->scsi_target_id = fc_host->next_target_id++; | |
1249 | else | |
1250 | rport->scsi_target_id = -1; | |
1251 | list_add_tail(&rport->peers, &fc_host_rports(shost)); | |
1252 | get_device(&shost->shost_gendev); | |
1253 | ||
1254 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1255 | ||
1256 | dev = &rport->dev; | |
1257 | device_initialize(dev); | |
1258 | dev->parent = get_device(&shost->shost_gendev); | |
1259 | dev->release = fc_rport_dev_release; | |
1260 | sprintf(dev->bus_id, "rport-%d:%d-%d", | |
1261 | shost->host_no, channel, rport->number); | |
1262 | transport_setup_device(dev); | |
1263 | ||
1264 | error = device_add(dev); | |
1265 | if (error) { | |
1266 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
1267 | goto delete_rport; | |
1268 | } | |
1269 | transport_add_device(dev); | |
1270 | transport_configure_device(dev); | |
1271 | ||
1272 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1273 | /* initiate a scan of the target */ | |
1274 | scsi_queue_work(shost, &rport->scan_work); | |
1275 | ||
1276 | return rport; | |
1277 | ||
1278 | delete_rport: | |
1279 | transport_destroy_device(dev); | |
1280 | put_device(dev->parent); | |
1281 | spin_lock_irqsave(shost->host_lock, flags); | |
1282 | list_del(&rport->peers); | |
1283 | put_device(&shost->shost_gendev); | |
1284 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1285 | put_device(dev->parent); | |
1286 | kfree(rport); | |
1287 | return NULL; | |
1288 | } | |
1289 | ||
1290 | /** | |
1291 | * fc_remote_port_add - notifies the fc transport of the existence | |
1292 | * of a remote FC port. | |
1293 | * @shost: scsi host the remote port is connected to. | |
1294 | * @channel: Channel on shost port connected to. | |
1295 | * @ids: The world wide names, fc address, and FC4 port | |
1296 | * roles for the remote port. | |
1297 | * | |
1298 | * The LLDD calls this routine to notify the transport of the existence | |
1299 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
1300 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
1301 | * active for the port. | |
1302 | * | |
1303 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
1304 | * maintains consistent target id bindings on behalf of the LLDD. | |
1305 | * A consistent target id binding is an assignment of a target id to | |
1306 | * a remote port identifier, which persists while the scsi host is | |
1307 | * attached. The remote port can disappear, then later reappear, and | |
1308 | * it's target id assignment remains the same. This allows for shifts | |
1309 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
1310 | * changes to the scsi subsystem which is based on scsi host number and | |
1311 | * target id values. Bindings are only valid during the attachment of | |
1312 | * the scsi host. If the host detaches, then later re-attaches, target | |
1313 | * id bindings may change. | |
1314 | * | |
1315 | * This routine is responsible for returning a remote port structure. | |
1316 | * The routine will search the list of remote ports it maintains | |
1317 | * internally on behalf of consistent target id mappings. If found, the | |
1318 | * remote port structure will be reused. Otherwise, a new remote port | |
1319 | * structure will be allocated. | |
1320 | * | |
1321 | * Whenever a remote port is allocated, a new fc_remote_port class | |
1322 | * device is created. | |
1323 | * | |
1324 | * Should not be called from interrupt context. | |
1325 | * | |
1326 | * Notes: | |
1327 | * This routine assumes no locks are held on entry. | |
1328 | **/ | |
1329 | struct fc_rport * | |
1330 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
1331 | struct fc_rport_identifiers *ids) | |
1332 | { | |
1333 | struct fc_rport *rport; | |
1334 | unsigned long flags; | |
1335 | int match = 0; | |
1336 | ||
1337 | if (likely((ids->roles & FC_RPORT_ROLE_FCP_TARGET) && | |
1338 | (fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE))) { | |
1339 | ||
1340 | /* search for a matching consistent binding */ | |
1341 | ||
1342 | spin_lock_irqsave(shost->host_lock, flags); | |
1343 | ||
1344 | list_for_each_entry(rport, &fc_host_rport_bindings(shost), | |
1345 | peers) { | |
1346 | if (rport->channel != channel) | |
1347 | continue; | |
1348 | ||
1349 | switch (fc_host_tgtid_bind_type(shost)) { | |
1350 | case FC_TGTID_BIND_BY_WWPN: | |
1351 | if (rport->port_name == ids->port_name) | |
1352 | match = 1; | |
1353 | break; | |
1354 | case FC_TGTID_BIND_BY_WWNN: | |
1355 | if (rport->node_name == ids->node_name) | |
1356 | match = 1; | |
1357 | break; | |
1358 | case FC_TGTID_BIND_BY_ID: | |
1359 | if (rport->port_id == ids->port_id) | |
1360 | match = 1; | |
1361 | break; | |
1362 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
1363 | break; | |
1364 | } | |
1365 | ||
1366 | if (match) { | |
1367 | list_move_tail(&rport->peers, | |
1368 | &fc_host_rports(shost)); | |
1369 | break; | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1374 | ||
1375 | if (match) { | |
1376 | memcpy(&rport->node_name, &ids->node_name, | |
1377 | sizeof(rport->node_name)); | |
1378 | memcpy(&rport->port_name, &ids->port_name, | |
1379 | sizeof(rport->port_name)); | |
1380 | rport->port_id = ids->port_id; | |
1381 | rport->roles = ids->roles; | |
1382 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1383 | ||
1384 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1385 | /* initiate a scan of the target */ | |
1386 | scsi_queue_work(shost, &rport->scan_work); | |
1387 | ||
1388 | return rport; | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | /* No consistent binding found - create new remote port entry */ | |
1393 | rport = fc_rport_create(shost, channel, ids); | |
1394 | ||
1395 | return rport; | |
1396 | } | |
1397 | EXPORT_SYMBOL(fc_remote_port_add); | |
1398 | ||
1399 | /* | |
1400 | * fc_rport_tgt_remove - Removes the scsi target on the remote port | |
1401 | * @rport: The remote port to be operated on | |
1402 | */ | |
1403 | static void | |
1404 | fc_rport_tgt_remove(struct fc_rport *rport) | |
1405 | { | |
1406 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1407 | ||
1408 | scsi_target_unblock(&rport->dev); | |
1409 | ||
1410 | /* Stop anything on the workq */ | |
1411 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
1412 | flush_scheduled_work(); | |
1413 | scsi_flush_work(shost); | |
1414 | ||
1415 | scsi_remove_target(&rport->dev); | |
1416 | } | |
1417 | ||
1418 | /* | |
1419 | * fc_rport_terminate - this routine tears down and deallocates a remote port. | |
1420 | * @rport: The remote port to be terminated | |
1421 | * | |
1422 | * Notes: | |
1423 | * This routine assumes no locks are held on entry. | |
1424 | */ | |
1425 | static void | |
1426 | fc_rport_terminate(struct fc_rport *rport) | |
1427 | { | |
1428 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1429 | struct device *dev = &rport->dev; | |
1430 | unsigned long flags; | |
1431 | ||
1432 | fc_rport_tgt_remove(rport); | |
1433 | ||
1434 | transport_remove_device(dev); | |
1435 | device_del(dev); | |
1436 | transport_destroy_device(dev); | |
1437 | spin_lock_irqsave(shost->host_lock, flags); | |
1438 | list_del(&rport->peers); | |
1439 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1440 | put_device(&shost->shost_gendev); | |
1441 | } | |
1442 | ||
1443 | /** | |
1444 | * fc_remote_port_delete - notifies the fc transport that a remote | |
1445 | * port is no longer in existence. | |
1446 | * @rport: The remote port that no longer exists | |
1447 | * | |
1448 | * The LLDD calls this routine to notify the transport that a remote | |
1449 | * port is no longer part of the topology. Note: Although a port | |
1450 | * may no longer be part of the topology, it may persist in the remote | |
1451 | * ports displayed by the fc_host. This is done so that target id | |
1452 | * mappings (managed via the remote port structures), are always visible | |
1453 | * as long as the mapping is valid, regardless of port state, | |
1454 | * | |
1455 | * If the remote port is not an FCP Target, it will be fully torn down | |
1456 | * and deallocated, including the fc_remote_port class device. | |
1457 | * | |
1458 | * If the remote port is an FCP Target, the port structure will be | |
1459 | * marked as Not Present, but will remain as long as there is a valid | |
1460 | * SCSI target id mapping associated with the port structure. Validity | |
1461 | * is determined by the binding type. If binding by wwpn, then the port | |
1462 | * structure is always valid and will not be deallocated until the host | |
1463 | * is removed. If binding by wwnn, then the port structure is valid | |
1464 | * until another port with the same node name is found in the topology. | |
1465 | * If binding by port id (fc address), then the port structure is valid | |
1466 | * valid until another port with the same address is identified. | |
1467 | * | |
1468 | * Called from interrupt or normal process context. | |
1469 | * | |
1470 | * Notes: | |
1471 | * This routine assumes no locks are held on entry. | |
1472 | **/ | |
1473 | void | |
1474 | fc_remote_port_delete(struct fc_rport *rport) | |
1475 | { | |
1476 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1477 | unsigned long flags; | |
1478 | ||
1479 | /* If no scsi target id mapping or consistent binding type, delete it */ | |
1480 | if ((rport->scsi_target_id == -1) || | |
1481 | (fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE)) { | |
1482 | fc_rport_terminate(rport); | |
1483 | return; | |
1484 | } | |
1485 | ||
1486 | fc_rport_tgt_remove(rport); | |
1487 | ||
1488 | spin_lock_irqsave(shost->host_lock, flags); | |
1489 | list_move_tail(&rport->peers, &fc_host_rport_bindings(shost)); | |
1490 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1491 | ||
1492 | /* | |
1493 | * Note: We do not remove or clear the hostdata area. This allows | |
1494 | * host-specific target data to persist along with the | |
1495 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1496 | */ | |
1497 | ||
1498 | /* | |
1499 | * Reinitialize port attributes that may change if the port comes back. | |
1500 | */ | |
1501 | rport->maxframe_size = -1; | |
1502 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1503 | rport->roles = FC_RPORT_ROLE_UNKNOWN; | |
1504 | rport->port_state = FC_PORTSTATE_NOTPRESENT; | |
1505 | ||
1506 | /* remove the identifiers that aren't used in the consisting binding */ | |
1507 | switch (fc_host_tgtid_bind_type(shost)) { | |
1508 | case FC_TGTID_BIND_BY_WWPN: | |
1509 | rport->node_name = -1; | |
1510 | rport->port_id = -1; | |
1511 | break; | |
1512 | case FC_TGTID_BIND_BY_WWNN: | |
1513 | rport->port_name = -1; | |
1514 | rport->port_id = -1; | |
1515 | break; | |
1516 | case FC_TGTID_BIND_BY_ID: | |
1517 | rport->node_name = -1; | |
1518 | rport->port_name = -1; | |
1519 | break; | |
1520 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
1521 | break; | |
1522 | } | |
1523 | } | |
1524 | EXPORT_SYMBOL(fc_remote_port_delete); | |
1525 | ||
1526 | /** | |
1527 | * fc_remote_port_rolechg - notifies the fc transport that the roles | |
1528 | * on a remote may have changed. | |
1529 | * @rport: The remote port that changed. | |
1530 | * | |
1531 | * The LLDD calls this routine to notify the transport that the roles | |
1532 | * on a remote port may have changed. The largest effect of this is | |
1533 | * if a port now becomes a FCP Target, it must be allocated a | |
1534 | * scsi target id. If the port is no longer a FCP target, any | |
1535 | * scsi target id value assigned to it will persist in case the | |
1536 | * role changes back to include FCP Target. No changes in the scsi | |
1537 | * midlayer will be invoked if the role changes (in the expectation | |
1538 | * that the role will be resumed. If it doesn't normal error processing | |
1539 | * will take place). | |
1540 | * | |
1541 | * Should not be called from interrupt context. | |
1542 | * | |
1543 | * Notes: | |
1544 | * This routine assumes no locks are held on entry. | |
1545 | **/ | |
1546 | void | |
1547 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
1548 | { | |
1549 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1550 | struct fc_host_attrs *fc_host = | |
1551 | (struct fc_host_attrs *)shost->shost_data; | |
1552 | unsigned long flags; | |
1553 | int create = 0; | |
1554 | ||
1555 | rport->roles = roles; | |
1556 | ||
1557 | spin_lock_irqsave(shost->host_lock, flags); | |
1558 | if ((rport->scsi_target_id == -1) && | |
1559 | (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { | |
1560 | rport->scsi_target_id = fc_host->next_target_id++; | |
1561 | create = 1; | |
1562 | } | |
1563 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1564 | ||
1565 | if (create) | |
1566 | /* initiate a scan of the target */ | |
1567 | scsi_queue_work(shost, &rport->scan_work); | |
1568 | } | |
1569 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
1570 | ||
1571 | /** | |
1572 | * fc_timeout_blocked_rport - Timeout handler for blocked remote port | |
1573 | * that fails to return in the alloted time. | |
1574 | * @data: scsi target that failed to reappear in the alloted time. | |
1575 | **/ | |
1576 | static void | |
1577 | fc_timeout_blocked_rport(void *data) | |
1578 | { | |
1579 | struct fc_rport *rport = (struct fc_rport *)data; | |
1580 | ||
1581 | rport->port_state = FC_PORTSTATE_OFFLINE; | |
1582 | ||
1583 | dev_printk(KERN_ERR, &rport->dev, | |
1584 | "blocked FC remote port time out: removing target\n"); | |
1585 | ||
1586 | /* | |
1587 | * As this only occurs if the remote port (scsi target) | |
1588 | * went away and didn't come back - we'll remove | |
1589 | * all attached scsi devices. | |
1590 | */ | |
1591 | scsi_target_unblock(&rport->dev); | |
1592 | scsi_remove_target(&rport->dev); | |
1593 | } | |
1594 | ||
1595 | /** | |
1596 | * fc_remote_port_block - temporarily block any scsi traffic to a remote port. | |
1597 | * @rport: remote port to be blocked. | |
1598 | * | |
1599 | * scsi lldd's with a FC transport call this routine to temporarily stop | |
1600 | * all scsi traffic to a remote port. If the port is not a SCSI target, | |
1601 | * no action is taken. If the port is a SCSI target, all attached devices | |
1602 | * are placed into a SDEV_BLOCK state and a timer is started. The timer is | |
1603 | * represents the maximum amount of time the port may be blocked. If the | |
1604 | * timer expires, the port is considered non-existent and the attached | |
1605 | * scsi devices will be removed. | |
1606 | * | |
1607 | * Called from interrupt or normal process context. | |
1608 | * | |
1609 | * Returns zero if successful or error if not | |
1610 | * | |
1611 | * Notes: | |
1612 | * This routine assumes no locks are held on entry. | |
1613 | * | |
1614 | * The timeout and timer types are extracted from the fc transport | |
1615 | * attributes from the caller's rport pointer. | |
1616 | **/ | |
1617 | int | |
1618 | fc_remote_port_block(struct fc_rport *rport) | |
1619 | { | |
1620 | int timeout = rport->dev_loss_tmo; | |
1621 | struct work_struct *work = &rport->dev_loss_work; | |
1622 | ||
1623 | if (timeout < 0 || timeout > SCSI_DEVICE_BLOCK_MAX_TIMEOUT) | |
1624 | return -EINVAL; | |
1625 | ||
1626 | scsi_target_block(&rport->dev); | |
1627 | ||
1628 | /* cap the length the devices can be blocked */ | |
1629 | schedule_delayed_work(work, timeout * HZ); | |
1630 | ||
1631 | rport->port_state = FC_PORTSTATE_BLOCKED; | |
1632 | return 0; | |
1633 | } | |
1634 | EXPORT_SYMBOL(fc_remote_port_block); | |
1635 | ||
1636 | /** | |
1637 | * fc_remote_port_unblock - restart any blocked scsi traffic to a remote port. | |
1638 | * @rport: remote port to be unblocked. | |
1639 | * | |
1640 | * scsi lld's with a FC transport call this routine to restart IO to all | |
1641 | * devices associated with the caller's scsi target following a fc_target_block | |
1642 | * request. Called from interrupt or normal process context. | |
1643 | * | |
1644 | * Notes: | |
1645 | * This routine assumes no locks are held on entry. | |
1646 | **/ | |
1647 | void | |
1648 | fc_remote_port_unblock(struct fc_rport *rport) | |
1649 | { | |
1650 | struct work_struct *work = &rport->dev_loss_work; | |
1651 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1652 | ||
1653 | /* | |
1654 | * Stop the target timer first. Take no action on the del_timer | |
1655 | * failure as the state machine state change will validate the | |
1656 | * transaction. | |
1657 | */ | |
1658 | if (!cancel_delayed_work(work)) | |
1659 | flush_scheduled_work(); | |
1660 | ||
1661 | if (rport->port_state == FC_PORTSTATE_OFFLINE) | |
1662 | /* | |
1663 | * initiate a scan of the target as the target has | |
1664 | * been torn down. | |
1665 | */ | |
1666 | scsi_queue_work(shost, &rport->scan_work); | |
1667 | else | |
1668 | scsi_target_unblock(&rport->dev); | |
1669 | ||
1670 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1671 | } | |
1672 | EXPORT_SYMBOL(fc_remote_port_unblock); | |
1673 | ||
1674 | /** | |
1675 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
1676 | * @data: remote port to be scanned. | |
1677 | **/ | |
1678 | static void | |
1679 | fc_scsi_scan_rport(void *data) | |
1680 | { | |
1681 | struct fc_rport *rport = (struct fc_rport *)data; | |
1682 | ||
1683 | scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id, | |
1684 | SCAN_WILD_CARD, 1); | |
1685 | } | |
1686 | ||
1687 | ||
1688 | MODULE_AUTHOR("Martin Hicks"); | |
1689 | MODULE_DESCRIPTION("FC Transport Attributes"); | |
1690 | MODULE_LICENSE("GPL"); | |
1691 | ||
1692 | module_init(fc_transport_init); | |
1693 | module_exit(fc_transport_exit); |