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1da177e4 LT |
1 | /* |
2 | * FiberChannel transport specific attributes exported to sysfs. | |
3 | * | |
4 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | * ======== | |
21 | * | |
22 | * Copyright (C) 2004-2005 James Smart, Emulex Corporation | |
23 | * Rewrite for host, target, device, and remote port attributes, | |
24 | * statistics, and service functions... | |
25 | * | |
26 | */ | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
4e57b681 | 29 | #include <linux/sched.h> /* workqueue stuff, HZ */ |
1da177e4 LT |
30 | #include <scsi/scsi_device.h> |
31 | #include <scsi/scsi_host.h> | |
32 | #include <scsi/scsi_transport.h> | |
33 | #include <scsi/scsi_transport_fc.h> | |
34 | #include "scsi_priv.h" | |
35 | ||
1da177e4 LT |
36 | /* |
37 | * Redefine so that we can have same named attributes in the | |
38 | * sdev/starget/host objects. | |
39 | */ | |
40 | #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
41 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
42 | __ATTR(_name,_mode,_show,_store) | |
43 | ||
44 | #define fc_enum_name_search(title, table_type, table) \ | |
45 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
46 | { \ | |
47 | int i; \ | |
48 | char *name = NULL; \ | |
49 | \ | |
50 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
51 | if (table[i].value == table_key) { \ | |
52 | name = table[i].name; \ | |
53 | break; \ | |
54 | } \ | |
55 | } \ | |
56 | return name; \ | |
57 | } | |
58 | ||
59 | #define fc_enum_name_match(title, table_type, table) \ | |
60 | static int get_fc_##title##_match(const char *table_key, \ | |
61 | enum table_type *value) \ | |
62 | { \ | |
63 | int i; \ | |
64 | \ | |
65 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
66 | if (strncmp(table_key, table[i].name, \ | |
67 | table[i].matchlen) == 0) { \ | |
68 | *value = table[i].value; \ | |
69 | return 0; /* success */ \ | |
70 | } \ | |
71 | } \ | |
72 | return 1; /* failure */ \ | |
73 | } | |
74 | ||
75 | ||
76 | /* Convert fc_port_type values to ascii string name */ | |
77 | static struct { | |
78 | enum fc_port_type value; | |
79 | char *name; | |
80 | } fc_port_type_names[] = { | |
81 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
82 | { FC_PORTTYPE_OTHER, "Other" }, | |
83 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
84 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
85 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
86 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
87 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" }, | |
88 | }; | |
89 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
90 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
91 | ||
92 | ||
93 | /* Convert fc_port_state values to ascii string name */ | |
94 | static struct { | |
95 | enum fc_port_state value; | |
96 | char *name; | |
97 | } fc_port_state_names[] = { | |
98 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
99 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
100 | { FC_PORTSTATE_ONLINE, "Online" }, | |
101 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
102 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
103 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
104 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
105 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
106 | { FC_PORTSTATE_ERROR, "Error" }, | |
107 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
42e33148 | 108 | { FC_PORTSTATE_DELETED, "Deleted" }, |
1da177e4 LT |
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 */ | |
0ad78200 | 115 | static const struct { |
1da177e4 LT |
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 */ | |
0ad78200 | 153 | static const struct { |
1da177e4 LT |
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 */ | |
0ad78200 | 167 | static const struct { |
1da177e4 LT |
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 */ | |
0ad78200 | 193 | static const struct { |
1da177e4 LT |
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 | ||
42e33148 | 215 | static void fc_shost_remove_rports(void *data); |
19a7b4ae | 216 | static void fc_timeout_deleted_rport(void *data); |
1da177e4 LT |
217 | static void fc_scsi_scan_rport(void *data); |
218 | static void fc_rport_terminate(struct fc_rport *rport); | |
219 | ||
220 | /* | |
221 | * Attribute counts pre object type... | |
222 | * Increase these values if you add attributes | |
223 | */ | |
224 | #define FC_STARGET_NUM_ATTRS 3 | |
225 | #define FC_RPORT_NUM_ATTRS 9 | |
91ca7b01 | 226 | #define FC_HOST_NUM_ATTRS 16 |
1da177e4 LT |
227 | |
228 | struct fc_internal { | |
229 | struct scsi_transport_template t; | |
230 | struct fc_function_template *f; | |
231 | ||
232 | /* | |
233 | * For attributes : each object has : | |
234 | * An array of the actual attributes structures | |
235 | * An array of null-terminated pointers to the attribute | |
236 | * structures - used for mid-layer interaction. | |
237 | * | |
238 | * The attribute containers for the starget and host are are | |
239 | * part of the midlayer. As the remote port is specific to the | |
240 | * fc transport, we must provide the attribute container. | |
241 | */ | |
242 | struct class_device_attribute private_starget_attrs[ | |
243 | FC_STARGET_NUM_ATTRS]; | |
244 | struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; | |
245 | ||
246 | struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; | |
247 | struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
248 | ||
249 | struct transport_container rport_attr_cont; | |
250 | struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; | |
251 | struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
252 | }; | |
253 | ||
254 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
255 | ||
d0a7e574 JB |
256 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
257 | struct class_device *cdev) | |
1da177e4 LT |
258 | { |
259 | struct scsi_target *starget = to_scsi_target(dev); | |
260 | struct fc_rport *rport = starget_to_rport(starget); | |
261 | ||
262 | /* | |
263 | * if parent is remote port, use values from remote port. | |
264 | * Otherwise, this host uses the fc_transport, but not the | |
265 | * remote port interface. As such, initialize to known non-values. | |
266 | */ | |
267 | if (rport) { | |
268 | fc_starget_node_name(starget) = rport->node_name; | |
269 | fc_starget_port_name(starget) = rport->port_name; | |
270 | fc_starget_port_id(starget) = rport->port_id; | |
271 | } else { | |
272 | fc_starget_node_name(starget) = -1; | |
273 | fc_starget_port_name(starget) = -1; | |
274 | fc_starget_port_id(starget) = -1; | |
275 | } | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
281 | "fc_transport", | |
282 | fc_target_setup, | |
283 | NULL, | |
284 | NULL); | |
285 | ||
d0a7e574 JB |
286 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
287 | struct class_device *cdev) | |
1da177e4 LT |
288 | { |
289 | struct Scsi_Host *shost = dev_to_shost(dev); | |
290 | ||
291 | /* | |
292 | * Set default values easily detected by the midlayer as | |
293 | * failure cases. The scsi lldd is responsible for initializing | |
294 | * all transport attributes to valid values per host. | |
295 | */ | |
296 | fc_host_node_name(shost) = -1; | |
297 | fc_host_port_name(shost) = -1; | |
298 | fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED; | |
299 | memset(fc_host_supported_fc4s(shost), 0, | |
300 | sizeof(fc_host_supported_fc4s(shost))); | |
301 | memset(fc_host_symbolic_name(shost), 0, | |
302 | sizeof(fc_host_symbolic_name(shost))); | |
303 | fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN; | |
304 | fc_host_maxframe_size(shost) = -1; | |
305 | memset(fc_host_serial_number(shost), 0, | |
306 | sizeof(fc_host_serial_number(shost))); | |
307 | ||
308 | fc_host_port_id(shost) = -1; | |
309 | fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; | |
310 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
311 | memset(fc_host_active_fc4s(shost), 0, | |
312 | sizeof(fc_host_active_fc4s(shost))); | |
313 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
314 | fc_host_fabric_name(shost) = -1; | |
315 | ||
316 | fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN; | |
317 | ||
318 | INIT_LIST_HEAD(&fc_host_rports(shost)); | |
319 | INIT_LIST_HEAD(&fc_host_rport_bindings(shost)); | |
320 | fc_host_next_rport_number(shost) = 0; | |
321 | fc_host_next_target_id(shost) = 0; | |
322 | ||
42e33148 JSEC |
323 | fc_host_flags(shost) = 0; |
324 | INIT_WORK(&fc_host_rport_del_work(shost), fc_shost_remove_rports, shost); | |
1da177e4 LT |
325 | return 0; |
326 | } | |
327 | ||
328 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
329 | "fc_host", | |
330 | fc_host_setup, | |
331 | NULL, | |
332 | NULL); | |
333 | ||
334 | /* | |
335 | * Setup and Remove actions for remote ports are handled | |
336 | * in the service functions below. | |
337 | */ | |
338 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
339 | "fc_remote_ports", | |
340 | NULL, | |
341 | NULL, | |
342 | NULL); | |
343 | ||
344 | /* | |
345 | * Module Parameters | |
346 | */ | |
347 | ||
348 | /* | |
349 | * dev_loss_tmo: the default number of seconds that the FC transport | |
350 | * should insulate the loss of a remote port. | |
351 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
352 | */ | |
353 | static unsigned int fc_dev_loss_tmo = SCSI_DEVICE_BLOCK_MAX_TIMEOUT; | |
354 | ||
355 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR); | |
356 | MODULE_PARM_DESC(dev_loss_tmo, | |
357 | "Maximum number of seconds that the FC transport should" | |
358 | " insulate the loss of a remote port. Once this value is" | |
359 | " exceeded, the scsi target is removed. Value should be" | |
360 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); | |
361 | ||
362 | ||
363 | static __init int fc_transport_init(void) | |
364 | { | |
365 | int error = transport_class_register(&fc_host_class); | |
366 | if (error) | |
367 | return error; | |
368 | error = transport_class_register(&fc_rport_class); | |
369 | if (error) | |
370 | return error; | |
371 | return transport_class_register(&fc_transport_class); | |
372 | } | |
373 | ||
374 | static void __exit fc_transport_exit(void) | |
375 | { | |
376 | transport_class_unregister(&fc_transport_class); | |
377 | transport_class_unregister(&fc_rport_class); | |
378 | transport_class_unregister(&fc_host_class); | |
379 | } | |
380 | ||
381 | /* | |
382 | * FC Remote Port Attribute Management | |
383 | */ | |
384 | ||
385 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
386 | static ssize_t \ | |
387 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
388 | { \ | |
389 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
390 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
391 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
392 | if ((i->f->get_rport_##field) && \ |
393 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 394 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 395 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
396 | i->f->get_rport_##field(rport); \ |
397 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
398 | } | |
399 | ||
400 | #define fc_rport_store_function(field) \ | |
401 | static ssize_t \ | |
402 | store_fc_rport_##field(struct class_device *cdev, const char *buf, \ | |
403 | size_t count) \ | |
404 | { \ | |
405 | int val; \ | |
406 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
407 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
408 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae | 409 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
42e33148 | 410 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae JSEC |
411 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
412 | return -EBUSY; \ | |
1da177e4 LT |
413 | val = simple_strtoul(buf, NULL, 0); \ |
414 | i->f->set_rport_##field(rport, val); \ | |
415 | return count; \ | |
416 | } | |
417 | ||
418 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
419 | fc_rport_show_function(field, format_string, sz, ) \ | |
420 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
421 | show_fc_rport_##field, NULL) | |
422 | ||
423 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
424 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
425 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
426 | show_fc_rport_##field, NULL) | |
427 | ||
428 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
429 | fc_rport_show_function(field, format_string, sz, ) \ | |
430 | fc_rport_store_function(field) \ | |
431 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ | |
432 | show_fc_rport_##field, \ | |
433 | store_fc_rport_##field) | |
434 | ||
435 | ||
436 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
437 | static ssize_t \ | |
438 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
439 | { \ | |
440 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
441 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
442 | } | |
443 | ||
444 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
445 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
446 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
447 | show_fc_rport_##field, NULL) | |
448 | ||
449 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
450 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
451 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
452 | show_fc_rport_##field, NULL) | |
453 | ||
454 | ||
455 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
456 | static ssize_t \ | |
457 | show_fc_rport_##title (struct class_device *cdev, char *buf) \ | |
458 | { \ | |
459 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
460 | const char *name; \ | |
461 | name = get_fc_##title##_name(rport->title); \ | |
462 | if (!name) \ | |
463 | return -EINVAL; \ | |
464 | return snprintf(buf, maxlen, "%s\n", name); \ | |
465 | } \ | |
466 | static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \ | |
467 | show_fc_rport_##title, NULL) | |
468 | ||
469 | ||
470 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
471 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
472 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
473 | i->private_rport_attrs[count].store = NULL; \ | |
474 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
475 | if (i->f->show_rport_##field) \ | |
476 | count++ | |
477 | ||
478 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
479 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
480 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
481 | i->private_rport_attrs[count].store = NULL; \ | |
482 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
483 | count++ | |
484 | ||
485 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
486 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
487 | if (!i->f->set_rport_##field) { \ | |
488 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
489 | i->private_rport_attrs[count].store = NULL; \ | |
490 | } \ | |
491 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
492 | if (i->f->show_rport_##field) \ | |
493 | count++ | |
494 | ||
495 | ||
496 | /* The FC Transport Remote Port Attributes: */ | |
497 | ||
498 | /* Fixed Remote Port Attributes */ | |
499 | ||
500 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
501 | ||
502 | static ssize_t | |
503 | show_fc_rport_supported_classes (struct class_device *cdev, char *buf) | |
504 | { | |
505 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
506 | if (rport->supported_classes == FC_COS_UNSPECIFIED) | |
507 | return snprintf(buf, 20, "unspecified\n"); | |
508 | return get_fc_cos_names(rport->supported_classes, buf); | |
509 | } | |
510 | static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO, | |
511 | show_fc_rport_supported_classes, NULL); | |
512 | ||
513 | /* Dynamic Remote Port Attributes */ | |
514 | ||
19a7b4ae JSEC |
515 | /* |
516 | * dev_loss_tmo attribute | |
517 | */ | |
518 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
519 | static ssize_t | |
520 | store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf, | |
521 | size_t count) | |
522 | { | |
523 | int val; | |
524 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
525 | struct Scsi_Host *shost = rport_to_shost(rport); | |
526 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
527 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
42e33148 | 528 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
529 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
530 | return -EBUSY; | |
531 | val = simple_strtoul(buf, NULL, 0); | |
532 | if ((val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
533 | return -EINVAL; | |
534 | i->f->set_rport_dev_loss_tmo(rport, val); | |
535 | return count; | |
536 | } | |
537 | static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, | |
538 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); | |
1da177e4 LT |
539 | |
540 | ||
541 | /* Private Remote Port Attributes */ | |
542 | ||
543 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
544 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
545 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
546 | ||
547 | static ssize_t | |
548 | show_fc_rport_roles (struct class_device *cdev, char *buf) | |
549 | { | |
550 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
551 | ||
552 | /* identify any roles that are port_id specific */ | |
553 | if ((rport->port_id != -1) && | |
554 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
555 | FC_WELLKNOWN_PORTID_MASK) { | |
556 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
557 | case FC_FPORT_PORTID: | |
558 | return snprintf(buf, 30, "Fabric Port\n"); | |
559 | case FC_FABCTLR_PORTID: | |
560 | return snprintf(buf, 30, "Fabric Controller\n"); | |
561 | case FC_DIRSRVR_PORTID: | |
562 | return snprintf(buf, 30, "Directory Server\n"); | |
563 | case FC_TIMESRVR_PORTID: | |
564 | return snprintf(buf, 30, "Time Server\n"); | |
565 | case FC_MGMTSRVR_PORTID: | |
566 | return snprintf(buf, 30, "Management Server\n"); | |
567 | default: | |
568 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
569 | } | |
570 | } else { | |
571 | if (rport->roles == FC_RPORT_ROLE_UNKNOWN) | |
572 | return snprintf(buf, 20, "unknown\n"); | |
573 | return get_fc_remote_port_roles_names(rport->roles, buf); | |
574 | } | |
575 | } | |
576 | static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO, | |
577 | show_fc_rport_roles, NULL); | |
578 | ||
579 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
580 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
581 | ||
582 | ||
583 | ||
584 | /* | |
585 | * FC SCSI Target Attribute Management | |
586 | */ | |
587 | ||
588 | /* | |
589 | * Note: in the target show function we recognize when the remote | |
590 | * port is in the heirarchy and do not allow the driver to get | |
591 | * involved in sysfs functions. The driver only gets involved if | |
592 | * it's the "old" style that doesn't use rports. | |
593 | */ | |
594 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
595 | static ssize_t \ | |
596 | show_fc_starget_##field (struct class_device *cdev, char *buf) \ | |
597 | { \ | |
598 | struct scsi_target *starget = transport_class_to_starget(cdev); \ | |
599 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ | |
600 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
601 | struct fc_rport *rport = starget_to_rport(starget); \ | |
602 | if (rport) \ | |
603 | fc_starget_##field(starget) = rport->field; \ | |
604 | else if (i->f->get_starget_##field) \ | |
605 | i->f->get_starget_##field(starget); \ | |
606 | return snprintf(buf, sz, format_string, \ | |
607 | cast fc_starget_##field(starget)); \ | |
608 | } | |
609 | ||
610 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
611 | fc_starget_show_function(field, format_string, sz, ) \ | |
612 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
613 | show_fc_starget_##field, NULL) | |
614 | ||
615 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
616 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
617 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
618 | show_fc_starget_##field, NULL) | |
619 | ||
620 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
621 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
622 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
623 | i->private_starget_attrs[count].store = NULL; \ | |
624 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
625 | if (i->f->show_starget_##field) \ | |
626 | count++ | |
627 | ||
628 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
629 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
630 | if (!i->f->set_starget_##field) { \ | |
631 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
632 | i->private_starget_attrs[count].store = NULL; \ | |
633 | } \ | |
634 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
635 | if (i->f->show_starget_##field) \ | |
636 | count++ | |
637 | ||
638 | /* The FC Transport SCSI Target Attributes: */ | |
639 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
640 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
641 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
642 | ||
643 | ||
644 | /* | |
645 | * Host Attribute Management | |
646 | */ | |
647 | ||
648 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
649 | static ssize_t \ | |
650 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
651 | { \ | |
652 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
653 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
654 | if (i->f->get_host_##field) \ | |
655 | i->f->get_host_##field(shost); \ | |
656 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
657 | } | |
658 | ||
659 | #define fc_host_store_function(field) \ | |
660 | static ssize_t \ | |
661 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
662 | size_t count) \ | |
663 | { \ | |
664 | int val; \ | |
665 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
666 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
667 | \ | |
668 | val = simple_strtoul(buf, NULL, 0); \ | |
669 | i->f->set_host_##field(shost, val); \ | |
670 | return count; \ | |
671 | } | |
672 | ||
673 | #define fc_host_rd_attr(field, format_string, sz) \ | |
674 | fc_host_show_function(field, format_string, sz, ) \ | |
675 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
676 | show_fc_host_##field, NULL) | |
677 | ||
678 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
679 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
680 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
681 | show_fc_host_##field, NULL) | |
682 | ||
683 | #define fc_host_rw_attr(field, format_string, sz) \ | |
684 | fc_host_show_function(field, format_string, sz, ) \ | |
685 | fc_host_store_function(field) \ | |
686 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ | |
687 | show_fc_host_##field, \ | |
688 | store_fc_host_##field) | |
689 | ||
690 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
691 | static ssize_t \ | |
692 | show_fc_host_##title (struct class_device *cdev, char *buf) \ | |
693 | { \ | |
694 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
695 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
696 | const char *name; \ | |
697 | if (i->f->get_host_##title) \ | |
698 | i->f->get_host_##title(shost); \ | |
699 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
700 | if (!name) \ | |
701 | return -EINVAL; \ | |
702 | return snprintf(buf, maxlen, "%s\n", name); \ | |
703 | } \ | |
704 | static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) | |
705 | ||
706 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
707 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
708 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
709 | i->private_host_attrs[count].store = NULL; \ | |
710 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
711 | if (i->f->show_host_##field) \ | |
712 | count++ | |
713 | ||
714 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ | |
715 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
716 | if (!i->f->set_host_##field) { \ | |
717 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
718 | i->private_host_attrs[count].store = NULL; \ | |
719 | } \ | |
720 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
721 | if (i->f->show_host_##field) \ | |
722 | count++ | |
723 | ||
724 | ||
725 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
726 | static ssize_t \ | |
727 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
728 | { \ | |
729 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
730 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
731 | } | |
732 | ||
733 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
734 | fc_private_host_show_function(field, format_string, sz, ) \ | |
735 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
736 | show_fc_host_##field, NULL) | |
737 | ||
738 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
739 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
740 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
741 | show_fc_host_##field, NULL) | |
742 | ||
743 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
744 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
745 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
746 | i->private_host_attrs[count].store = NULL; \ | |
747 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
748 | count++ | |
749 | ||
750 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 751 | { \ |
1da177e4 LT |
752 | i->private_host_attrs[count] = class_device_attr_host_##field; \ |
753 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
91ca7b01 AV |
754 | count++; \ |
755 | } | |
1da177e4 LT |
756 | |
757 | ||
758 | /* Fixed Host Attributes */ | |
759 | ||
760 | static ssize_t | |
761 | show_fc_host_supported_classes (struct class_device *cdev, char *buf) | |
762 | { | |
763 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
764 | ||
765 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
766 | return snprintf(buf, 20, "unspecified\n"); | |
767 | ||
768 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
769 | } | |
770 | static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, | |
771 | show_fc_host_supported_classes, NULL); | |
772 | ||
773 | static ssize_t | |
774 | show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) | |
775 | { | |
776 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
777 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); | |
778 | } | |
779 | static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, | |
780 | show_fc_host_supported_fc4s, NULL); | |
781 | ||
782 | static ssize_t | |
783 | show_fc_host_supported_speeds (struct class_device *cdev, char *buf) | |
784 | { | |
785 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
786 | ||
787 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
788 | return snprintf(buf, 20, "unknown\n"); | |
789 | ||
790 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
791 | } | |
792 | static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, | |
793 | show_fc_host_supported_speeds, NULL); | |
794 | ||
795 | ||
796 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
797 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
798 | fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1)); | |
799 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); | |
800 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); | |
801 | ||
802 | ||
803 | /* Dynamic Host Attributes */ | |
804 | ||
805 | static ssize_t | |
806 | show_fc_host_active_fc4s (struct class_device *cdev, char *buf) | |
807 | { | |
808 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
809 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
810 | ||
811 | if (i->f->get_host_active_fc4s) | |
812 | i->f->get_host_active_fc4s(shost); | |
813 | ||
814 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
815 | } | |
816 | static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, | |
817 | show_fc_host_active_fc4s, NULL); | |
818 | ||
819 | static ssize_t | |
820 | show_fc_host_speed (struct class_device *cdev, char *buf) | |
821 | { | |
822 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
823 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
824 | ||
825 | if (i->f->get_host_speed) | |
826 | i->f->get_host_speed(shost); | |
827 | ||
828 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
829 | return snprintf(buf, 20, "unknown\n"); | |
830 | ||
831 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
832 | } | |
833 | static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, | |
834 | show_fc_host_speed, NULL); | |
835 | ||
836 | ||
837 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
838 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
839 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
840 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
841 | ||
842 | ||
843 | /* Private Host Attributes */ | |
844 | ||
845 | static ssize_t | |
846 | show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) | |
847 | { | |
848 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
849 | const char *name; | |
850 | ||
851 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
852 | if (!name) | |
853 | return -EINVAL; | |
854 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
855 | } | |
856 | ||
d16794f6 JSEC |
857 | #define get_list_head_entry(pos, head, member) \ |
858 | pos = list_entry((head)->next, typeof(*pos), member) | |
859 | ||
1da177e4 LT |
860 | static ssize_t |
861 | store_fc_private_host_tgtid_bind_type(struct class_device *cdev, | |
862 | const char *buf, size_t count) | |
863 | { | |
864 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
d16794f6 | 865 | struct fc_rport *rport; |
1da177e4 LT |
866 | enum fc_tgtid_binding_type val; |
867 | unsigned long flags; | |
868 | ||
869 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
870 | return -EINVAL; | |
871 | ||
872 | /* if changing bind type, purge all unused consistent bindings */ | |
873 | if (val != fc_host_tgtid_bind_type(shost)) { | |
874 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
875 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
876 | get_list_head_entry(rport, | |
877 | &fc_host_rport_bindings(shost), peers); | |
878 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 | 879 | fc_rport_terminate(rport); |
d16794f6 JSEC |
880 | spin_lock_irqsave(shost->host_lock, flags); |
881 | } | |
1da177e4 LT |
882 | spin_unlock_irqrestore(shost->host_lock, flags); |
883 | } | |
884 | ||
885 | fc_host_tgtid_bind_type(shost) = val; | |
886 | return count; | |
887 | } | |
888 | ||
889 | static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, | |
890 | show_fc_private_host_tgtid_bind_type, | |
891 | store_fc_private_host_tgtid_bind_type); | |
892 | ||
91ca7b01 AV |
893 | static ssize_t |
894 | store_fc_private_host_issue_lip(struct class_device *cdev, | |
895 | const char *buf, size_t count) | |
896 | { | |
897 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
898 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
899 | int ret; | |
900 | ||
901 | /* ignore any data value written to the attribute */ | |
902 | if (i->f->issue_fc_host_lip) { | |
903 | ret = i->f->issue_fc_host_lip(shost); | |
904 | return ret ? ret: count; | |
905 | } | |
906 | ||
907 | return -ENOENT; | |
908 | } | |
909 | ||
910 | static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, | |
911 | store_fc_private_host_issue_lip); | |
912 | ||
1da177e4 LT |
913 | /* |
914 | * Host Statistics Management | |
915 | */ | |
916 | ||
917 | /* Show a given an attribute in the statistics group */ | |
918 | static ssize_t | |
919 | fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) | |
920 | { | |
921 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
922 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
923 | struct fc_host_statistics *stats; | |
924 | ssize_t ret = -ENOENT; | |
925 | ||
926 | if (offset > sizeof(struct fc_host_statistics) || | |
927 | offset % sizeof(u64) != 0) | |
928 | WARN_ON(1); | |
929 | ||
930 | if (i->f->get_fc_host_stats) { | |
931 | stats = (i->f->get_fc_host_stats)(shost); | |
932 | if (stats) | |
933 | ret = snprintf(buf, 20, "0x%llx\n", | |
934 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
935 | } | |
936 | return ret; | |
937 | } | |
938 | ||
939 | ||
940 | /* generate a read-only statistics attribute */ | |
941 | #define fc_host_statistic(name) \ | |
942 | static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ | |
943 | { \ | |
944 | return fc_stat_show(cd, buf, \ | |
945 | offsetof(struct fc_host_statistics, name)); \ | |
946 | } \ | |
947 | static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) | |
948 | ||
949 | fc_host_statistic(seconds_since_last_reset); | |
950 | fc_host_statistic(tx_frames); | |
951 | fc_host_statistic(tx_words); | |
952 | fc_host_statistic(rx_frames); | |
953 | fc_host_statistic(rx_words); | |
954 | fc_host_statistic(lip_count); | |
955 | fc_host_statistic(nos_count); | |
956 | fc_host_statistic(error_frames); | |
957 | fc_host_statistic(dumped_frames); | |
958 | fc_host_statistic(link_failure_count); | |
959 | fc_host_statistic(loss_of_sync_count); | |
960 | fc_host_statistic(loss_of_signal_count); | |
961 | fc_host_statistic(prim_seq_protocol_err_count); | |
962 | fc_host_statistic(invalid_tx_word_count); | |
963 | fc_host_statistic(invalid_crc_count); | |
964 | fc_host_statistic(fcp_input_requests); | |
965 | fc_host_statistic(fcp_output_requests); | |
966 | fc_host_statistic(fcp_control_requests); | |
967 | fc_host_statistic(fcp_input_megabytes); | |
968 | fc_host_statistic(fcp_output_megabytes); | |
969 | ||
970 | static ssize_t | |
971 | fc_reset_statistics(struct class_device *cdev, const char *buf, | |
972 | size_t count) | |
973 | { | |
974 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
975 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
976 | ||
977 | /* ignore any data value written to the attribute */ | |
978 | if (i->f->reset_fc_host_stats) { | |
979 | i->f->reset_fc_host_stats(shost); | |
980 | return count; | |
981 | } | |
982 | ||
983 | return -ENOENT; | |
984 | } | |
985 | static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, | |
986 | fc_reset_statistics); | |
987 | ||
988 | ||
989 | static struct attribute *fc_statistics_attrs[] = { | |
990 | &class_device_attr_host_seconds_since_last_reset.attr, | |
991 | &class_device_attr_host_tx_frames.attr, | |
992 | &class_device_attr_host_tx_words.attr, | |
993 | &class_device_attr_host_rx_frames.attr, | |
994 | &class_device_attr_host_rx_words.attr, | |
995 | &class_device_attr_host_lip_count.attr, | |
996 | &class_device_attr_host_nos_count.attr, | |
997 | &class_device_attr_host_error_frames.attr, | |
998 | &class_device_attr_host_dumped_frames.attr, | |
999 | &class_device_attr_host_link_failure_count.attr, | |
1000 | &class_device_attr_host_loss_of_sync_count.attr, | |
1001 | &class_device_attr_host_loss_of_signal_count.attr, | |
1002 | &class_device_attr_host_prim_seq_protocol_err_count.attr, | |
1003 | &class_device_attr_host_invalid_tx_word_count.attr, | |
1004 | &class_device_attr_host_invalid_crc_count.attr, | |
1005 | &class_device_attr_host_fcp_input_requests.attr, | |
1006 | &class_device_attr_host_fcp_output_requests.attr, | |
1007 | &class_device_attr_host_fcp_control_requests.attr, | |
1008 | &class_device_attr_host_fcp_input_megabytes.attr, | |
1009 | &class_device_attr_host_fcp_output_megabytes.attr, | |
1010 | &class_device_attr_host_reset_statistics.attr, | |
1011 | NULL | |
1012 | }; | |
1013 | ||
1014 | static struct attribute_group fc_statistics_group = { | |
1015 | .name = "statistics", | |
1016 | .attrs = fc_statistics_attrs, | |
1017 | }; | |
1018 | ||
1019 | static int fc_host_match(struct attribute_container *cont, | |
1020 | struct device *dev) | |
1021 | { | |
1022 | struct Scsi_Host *shost; | |
1023 | struct fc_internal *i; | |
1024 | ||
1025 | if (!scsi_is_host_device(dev)) | |
1026 | return 0; | |
1027 | ||
1028 | shost = dev_to_shost(dev); | |
1029 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1030 | != &fc_host_class.class) | |
1031 | return 0; | |
1032 | ||
1033 | i = to_fc_internal(shost->transportt); | |
1034 | ||
1035 | return &i->t.host_attrs.ac == cont; | |
1036 | } | |
1037 | ||
1038 | static int fc_target_match(struct attribute_container *cont, | |
1039 | struct device *dev) | |
1040 | { | |
1041 | struct Scsi_Host *shost; | |
1042 | struct fc_internal *i; | |
1043 | ||
1044 | if (!scsi_is_target_device(dev)) | |
1045 | return 0; | |
1046 | ||
1047 | shost = dev_to_shost(dev->parent); | |
1048 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1049 | != &fc_host_class.class) | |
1050 | return 0; | |
1051 | ||
1052 | i = to_fc_internal(shost->transportt); | |
1053 | ||
1054 | return &i->t.target_attrs.ac == cont; | |
1055 | } | |
1056 | ||
1057 | static void fc_rport_dev_release(struct device *dev) | |
1058 | { | |
1059 | struct fc_rport *rport = dev_to_rport(dev); | |
1060 | put_device(dev->parent); | |
1061 | kfree(rport); | |
1062 | } | |
1063 | ||
1064 | int scsi_is_fc_rport(const struct device *dev) | |
1065 | { | |
1066 | return dev->release == fc_rport_dev_release; | |
1067 | } | |
1068 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1069 | ||
1070 | static int fc_rport_match(struct attribute_container *cont, | |
1071 | struct device *dev) | |
1072 | { | |
1073 | struct Scsi_Host *shost; | |
1074 | struct fc_internal *i; | |
1075 | ||
1076 | if (!scsi_is_fc_rport(dev)) | |
1077 | return 0; | |
1078 | ||
1079 | shost = dev_to_shost(dev->parent); | |
1080 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1081 | != &fc_host_class.class) | |
1082 | return 0; | |
1083 | ||
1084 | i = to_fc_internal(shost->transportt); | |
1085 | ||
1086 | return &i->rport_attr_cont.ac == cont; | |
1087 | } | |
1088 | ||
5c44cd2a JSEC |
1089 | |
1090 | /* | |
1091 | * Must be called with shost->host_lock held | |
1092 | */ | |
1093 | static struct device *fc_target_parent(struct Scsi_Host *shost, | |
1094 | int channel, uint id) | |
1095 | { | |
1096 | struct fc_rport *rport; | |
1097 | ||
1098 | list_for_each_entry(rport, &fc_host_rports(shost), peers) | |
1099 | if ((rport->channel == channel) && | |
1100 | (rport->scsi_target_id == id)) | |
1101 | return &rport->dev; | |
1102 | ||
1103 | return NULL; | |
1104 | } | |
1105 | ||
1da177e4 LT |
1106 | struct scsi_transport_template * |
1107 | fc_attach_transport(struct fc_function_template *ft) | |
1108 | { | |
1109 | struct fc_internal *i = kmalloc(sizeof(struct fc_internal), | |
1110 | GFP_KERNEL); | |
1111 | int count; | |
1112 | ||
1113 | if (unlikely(!i)) | |
1114 | return NULL; | |
1115 | ||
1116 | memset(i, 0, sizeof(struct fc_internal)); | |
1117 | ||
1118 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; | |
1119 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
1120 | i->t.target_attrs.ac.match = fc_target_match; | |
1121 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
1122 | transport_container_register(&i->t.target_attrs); | |
1123 | ||
1124 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1125 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
1126 | i->t.host_attrs.ac.match = fc_host_match; | |
1127 | i->t.host_size = sizeof(struct fc_host_attrs); | |
1128 | if (ft->get_fc_host_stats) | |
1129 | i->t.host_attrs.statistics = &fc_statistics_group; | |
1130 | transport_container_register(&i->t.host_attrs); | |
1131 | ||
1132 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
1133 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
1134 | i->rport_attr_cont.ac.match = fc_rport_match; | |
1135 | transport_container_register(&i->rport_attr_cont); | |
1136 | ||
1137 | i->f = ft; | |
1138 | ||
1139 | /* Transport uses the shost workq for scsi scanning */ | |
1140 | i->t.create_work_queue = 1; | |
5c44cd2a JSEC |
1141 | |
1142 | i->t.target_parent = fc_target_parent; | |
1da177e4 LT |
1143 | |
1144 | /* | |
1145 | * Setup SCSI Target Attributes. | |
1146 | */ | |
1147 | count = 0; | |
1148 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
1149 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
1150 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
1151 | ||
1152 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
1153 | ||
1154 | i->starget_attrs[count] = NULL; | |
1155 | ||
1156 | ||
1157 | /* | |
1158 | * Setup SCSI Host Attributes. | |
1159 | */ | |
1160 | count=0; | |
1161 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
1162 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
1163 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); | |
1164 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1165 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); | |
1166 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); | |
1167 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
1168 | SETUP_HOST_ATTRIBUTE_RD(serial_number); | |
1169 | ||
1170 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
1171 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
1172 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
1173 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
1174 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
1175 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
1176 | ||
1177 | /* Transport-managed attributes */ | |
1178 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); | |
91ca7b01 AV |
1179 | if (ft->issue_fc_host_lip) |
1180 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
1da177e4 LT |
1181 | |
1182 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
1183 | ||
1184 | i->host_attrs[count] = NULL; | |
1185 | ||
1186 | /* | |
1187 | * Setup Remote Port Attributes. | |
1188 | */ | |
1189 | count=0; | |
1190 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
1191 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
1192 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
1193 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
1194 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
1195 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
1196 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
1197 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
1198 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
1199 | ||
1200 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
1201 | ||
1202 | i->rport_attrs[count] = NULL; | |
1203 | ||
1204 | return &i->t; | |
1205 | } | |
1206 | EXPORT_SYMBOL(fc_attach_transport); | |
1207 | ||
1208 | void fc_release_transport(struct scsi_transport_template *t) | |
1209 | { | |
1210 | struct fc_internal *i = to_fc_internal(t); | |
1211 | ||
1212 | transport_container_unregister(&i->t.target_attrs); | |
1213 | transport_container_unregister(&i->t.host_attrs); | |
1214 | transport_container_unregister(&i->rport_attr_cont); | |
1215 | ||
1216 | kfree(i); | |
1217 | } | |
1218 | EXPORT_SYMBOL(fc_release_transport); | |
1219 | ||
1220 | ||
1221 | /** | |
1222 | * fc_remove_host - called to terminate any fc_transport-related elements | |
1223 | * for a scsi host. | |
1224 | * @rport: remote port to be unblocked. | |
1225 | * | |
1226 | * This routine is expected to be called immediately preceeding the | |
1227 | * a driver's call to scsi_remove_host(). | |
1228 | * | |
1229 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
1230 | * this routine prior to scsi_remote_host(), will leave dangling | |
1231 | * objects in /sys/class/fc_remote_ports. Access to any of these | |
1232 | * objects can result in a system crash !!! | |
1233 | * | |
1234 | * Notes: | |
1235 | * This routine assumes no locks are held on entry. | |
1236 | **/ | |
1237 | void | |
1238 | fc_remove_host(struct Scsi_Host *shost) | |
1239 | { | |
1240 | struct fc_rport *rport, *next_rport; | |
1241 | ||
1242 | /* Remove any remote ports */ | |
1243 | list_for_each_entry_safe(rport, next_rport, | |
1244 | &fc_host_rports(shost), peers) | |
1245 | fc_rport_terminate(rport); | |
1246 | list_for_each_entry_safe(rport, next_rport, | |
1247 | &fc_host_rport_bindings(shost), peers) | |
1248 | fc_rport_terminate(rport); | |
1249 | } | |
1250 | EXPORT_SYMBOL(fc_remove_host); | |
1251 | ||
19a7b4ae JSEC |
1252 | /* |
1253 | * fc_rport_tgt_remove - Removes the scsi target on the remote port | |
1254 | * @rport: The remote port to be operated on | |
1255 | */ | |
1256 | static void | |
1257 | fc_rport_tgt_remove(struct fc_rport *rport) | |
1258 | { | |
1259 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1260 | ||
1261 | scsi_target_unblock(&rport->dev); | |
1262 | ||
1263 | /* Stop anything on the workq */ | |
1264 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
1265 | flush_scheduled_work(); | |
1266 | scsi_flush_work(shost); | |
1267 | ||
1268 | scsi_remove_target(&rport->dev); | |
1269 | } | |
1270 | ||
1da177e4 LT |
1271 | /** |
1272 | * fc_rport_create - allocates and creates a remote FC port. | |
1273 | * @shost: scsi host the remote port is connected to. | |
1274 | * @channel: Channel on shost port connected to. | |
1275 | * @ids: The world wide names, fc address, and FC4 port | |
1276 | * roles for the remote port. | |
1277 | * | |
1278 | * Allocates and creates the remoter port structure, including the | |
1279 | * class and sysfs creation. | |
1280 | * | |
1281 | * Notes: | |
1282 | * This routine assumes no locks are held on entry. | |
1283 | **/ | |
1284 | struct fc_rport * | |
1285 | fc_rport_create(struct Scsi_Host *shost, int channel, | |
1286 | struct fc_rport_identifiers *ids) | |
1287 | { | |
1288 | struct fc_host_attrs *fc_host = | |
1289 | (struct fc_host_attrs *)shost->shost_data; | |
1290 | struct fc_internal *fci = to_fc_internal(shost->transportt); | |
1291 | struct fc_rport *rport; | |
1292 | struct device *dev; | |
1293 | unsigned long flags; | |
1294 | int error; | |
1295 | size_t size; | |
1296 | ||
1297 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
1298 | rport = kmalloc(size, GFP_KERNEL); | |
1299 | if (unlikely(!rport)) { | |
1300 | printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); | |
1301 | return NULL; | |
1302 | } | |
1303 | memset(rport, 0, size); | |
1304 | ||
1305 | rport->maxframe_size = -1; | |
1306 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1307 | rport->dev_loss_tmo = fc_dev_loss_tmo; | |
1308 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); | |
1309 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
1310 | rport->port_id = ids->port_id; | |
1311 | rport->roles = ids->roles; | |
1312 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1313 | if (fci->f->dd_fcrport_size) | |
1314 | rport->dd_data = &rport[1]; | |
1315 | rport->channel = channel; | |
1316 | ||
19a7b4ae | 1317 | INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport); |
1da177e4 LT |
1318 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport); |
1319 | ||
1320 | spin_lock_irqsave(shost->host_lock, flags); | |
1321 | ||
1322 | rport->number = fc_host->next_rport_number++; | |
1323 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1324 | rport->scsi_target_id = fc_host->next_target_id++; | |
1325 | else | |
1326 | rport->scsi_target_id = -1; | |
1327 | list_add_tail(&rport->peers, &fc_host_rports(shost)); | |
1328 | get_device(&shost->shost_gendev); | |
1329 | ||
1330 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1331 | ||
1332 | dev = &rport->dev; | |
1333 | device_initialize(dev); | |
1334 | dev->parent = get_device(&shost->shost_gendev); | |
1335 | dev->release = fc_rport_dev_release; | |
1336 | sprintf(dev->bus_id, "rport-%d:%d-%d", | |
1337 | shost->host_no, channel, rport->number); | |
1338 | transport_setup_device(dev); | |
1339 | ||
1340 | error = device_add(dev); | |
1341 | if (error) { | |
1342 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
1343 | goto delete_rport; | |
1344 | } | |
1345 | transport_add_device(dev); | |
1346 | transport_configure_device(dev); | |
1347 | ||
1348 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1349 | /* initiate a scan of the target */ | |
1350 | scsi_queue_work(shost, &rport->scan_work); | |
1351 | ||
1352 | return rport; | |
1353 | ||
1354 | delete_rport: | |
1355 | transport_destroy_device(dev); | |
1356 | put_device(dev->parent); | |
1357 | spin_lock_irqsave(shost->host_lock, flags); | |
1358 | list_del(&rport->peers); | |
1359 | put_device(&shost->shost_gendev); | |
1360 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1361 | put_device(dev->parent); | |
1362 | kfree(rport); | |
1363 | return NULL; | |
1364 | } | |
1365 | ||
1366 | /** | |
1367 | * fc_remote_port_add - notifies the fc transport of the existence | |
1368 | * of a remote FC port. | |
1369 | * @shost: scsi host the remote port is connected to. | |
1370 | * @channel: Channel on shost port connected to. | |
1371 | * @ids: The world wide names, fc address, and FC4 port | |
1372 | * roles for the remote port. | |
1373 | * | |
1374 | * The LLDD calls this routine to notify the transport of the existence | |
1375 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
1376 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
1377 | * active for the port. | |
1378 | * | |
1379 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
1380 | * maintains consistent target id bindings on behalf of the LLDD. | |
1381 | * A consistent target id binding is an assignment of a target id to | |
1382 | * a remote port identifier, which persists while the scsi host is | |
1383 | * attached. The remote port can disappear, then later reappear, and | |
1384 | * it's target id assignment remains the same. This allows for shifts | |
1385 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
1386 | * changes to the scsi subsystem which is based on scsi host number and | |
1387 | * target id values. Bindings are only valid during the attachment of | |
1388 | * the scsi host. If the host detaches, then later re-attaches, target | |
1389 | * id bindings may change. | |
1390 | * | |
1391 | * This routine is responsible for returning a remote port structure. | |
1392 | * The routine will search the list of remote ports it maintains | |
1393 | * internally on behalf of consistent target id mappings. If found, the | |
1394 | * remote port structure will be reused. Otherwise, a new remote port | |
1395 | * structure will be allocated. | |
1396 | * | |
1397 | * Whenever a remote port is allocated, a new fc_remote_port class | |
1398 | * device is created. | |
1399 | * | |
1400 | * Should not be called from interrupt context. | |
1401 | * | |
1402 | * Notes: | |
1403 | * This routine assumes no locks are held on entry. | |
1404 | **/ | |
1405 | struct fc_rport * | |
1406 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
1407 | struct fc_rport_identifiers *ids) | |
1408 | { | |
19a7b4ae | 1409 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
1da177e4 LT |
1410 | struct fc_rport *rport; |
1411 | unsigned long flags; | |
1412 | int match = 0; | |
1413 | ||
19a7b4ae JSEC |
1414 | /* |
1415 | * Search the list of "active" rports, for an rport that has been | |
1416 | * deleted, but we've held off the real delete while the target | |
1417 | * is in a "blocked" state. | |
1418 | */ | |
1419 | spin_lock_irqsave(shost->host_lock, flags); | |
1420 | ||
1421 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { | |
1422 | ||
1423 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
1424 | (rport->channel == channel)) { | |
1425 | ||
1426 | switch (fc_host_tgtid_bind_type(shost)) { | |
1427 | case FC_TGTID_BIND_BY_WWPN: | |
1428 | case FC_TGTID_BIND_NONE: | |
1429 | if (rport->port_name == ids->port_name) | |
1430 | match = 1; | |
1431 | break; | |
1432 | case FC_TGTID_BIND_BY_WWNN: | |
1433 | if (rport->node_name == ids->node_name) | |
1434 | match = 1; | |
1435 | break; | |
1436 | case FC_TGTID_BIND_BY_ID: | |
1437 | if (rport->port_id == ids->port_id) | |
1438 | match = 1; | |
1439 | break; | |
1440 | } | |
1441 | ||
1442 | if (match) { | |
1443 | struct work_struct *work = | |
1444 | &rport->dev_loss_work; | |
1445 | ||
1446 | memcpy(&rport->node_name, &ids->node_name, | |
1447 | sizeof(rport->node_name)); | |
1448 | memcpy(&rport->port_name, &ids->port_name, | |
1449 | sizeof(rport->port_name)); | |
1450 | rport->port_id = ids->port_id; | |
1451 | ||
1452 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1453 | rport->roles = ids->roles; | |
1454 | ||
1455 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1456 | ||
1457 | if (fci->f->dd_fcrport_size) | |
1458 | memset(rport->dd_data, 0, | |
1459 | fci->f->dd_fcrport_size); | |
1460 | ||
1461 | /* | |
1462 | * If we were blocked, we were a target. | |
1463 | * If no longer a target, we leave the timer | |
1464 | * running in case the port changes roles | |
1465 | * prior to the timer expiring. If the timer | |
1466 | * fires, the target will be torn down. | |
1467 | */ | |
1468 | if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET)) | |
1469 | return rport; | |
1470 | ||
1471 | /* restart the target */ | |
1472 | ||
1473 | /* | |
1474 | * Stop the target timer first. Take no action | |
1475 | * on the del_timer failure as the state | |
1476 | * machine state change will validate the | |
1477 | * transaction. | |
1478 | */ | |
1479 | if (!cancel_delayed_work(work)) | |
1480 | flush_scheduled_work(); | |
1481 | ||
1482 | /* initiate a scan of the target */ | |
1483 | scsi_queue_work(shost, &rport->scan_work); | |
1484 | ||
1485 | return rport; | |
1486 | } | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | /* Search the bindings array */ | |
1da177e4 LT |
1491 | if (likely((ids->roles & FC_RPORT_ROLE_FCP_TARGET) && |
1492 | (fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE))) { | |
1493 | ||
1494 | /* search for a matching consistent binding */ | |
1495 | ||
1da177e4 LT |
1496 | list_for_each_entry(rport, &fc_host_rport_bindings(shost), |
1497 | peers) { | |
1498 | if (rport->channel != channel) | |
1499 | continue; | |
1500 | ||
1501 | switch (fc_host_tgtid_bind_type(shost)) { | |
1502 | case FC_TGTID_BIND_BY_WWPN: | |
1503 | if (rport->port_name == ids->port_name) | |
1504 | match = 1; | |
1505 | break; | |
1506 | case FC_TGTID_BIND_BY_WWNN: | |
1507 | if (rport->node_name == ids->node_name) | |
1508 | match = 1; | |
1509 | break; | |
1510 | case FC_TGTID_BIND_BY_ID: | |
1511 | if (rport->port_id == ids->port_id) | |
1512 | match = 1; | |
1513 | break; | |
1514 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
1515 | break; | |
1516 | } | |
1517 | ||
1518 | if (match) { | |
1519 | list_move_tail(&rport->peers, | |
1520 | &fc_host_rports(shost)); | |
1521 | break; | |
1522 | } | |
1523 | } | |
1524 | ||
1da177e4 LT |
1525 | if (match) { |
1526 | memcpy(&rport->node_name, &ids->node_name, | |
1527 | sizeof(rport->node_name)); | |
1528 | memcpy(&rport->port_name, &ids->port_name, | |
1529 | sizeof(rport->port_name)); | |
1530 | rport->port_id = ids->port_id; | |
1531 | rport->roles = ids->roles; | |
1532 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1533 | ||
19a7b4ae JSEC |
1534 | spin_unlock_irqrestore(shost->host_lock, flags); |
1535 | ||
1536 | if (fci->f->dd_fcrport_size) | |
1537 | memset(rport->dd_data, 0, | |
1538 | fci->f->dd_fcrport_size); | |
1539 | ||
1da177e4 LT |
1540 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) |
1541 | /* initiate a scan of the target */ | |
1542 | scsi_queue_work(shost, &rport->scan_work); | |
1543 | ||
1544 | return rport; | |
1545 | } | |
1546 | } | |
1547 | ||
19a7b4ae JSEC |
1548 | spin_unlock_irqrestore(shost->host_lock, flags); |
1549 | ||
1da177e4 LT |
1550 | /* No consistent binding found - create new remote port entry */ |
1551 | rport = fc_rport_create(shost, channel, ids); | |
1552 | ||
1553 | return rport; | |
1554 | } | |
1555 | EXPORT_SYMBOL(fc_remote_port_add); | |
1556 | ||
1da177e4 LT |
1557 | /* |
1558 | * fc_rport_terminate - this routine tears down and deallocates a remote port. | |
1559 | * @rport: The remote port to be terminated | |
1560 | * | |
1561 | * Notes: | |
1562 | * This routine assumes no locks are held on entry. | |
1563 | */ | |
1564 | static void | |
1565 | fc_rport_terminate(struct fc_rport *rport) | |
1566 | { | |
1567 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1568 | struct device *dev = &rport->dev; | |
1569 | unsigned long flags; | |
1570 | ||
1571 | fc_rport_tgt_remove(rport); | |
1572 | ||
1573 | transport_remove_device(dev); | |
1574 | device_del(dev); | |
1575 | transport_destroy_device(dev); | |
1576 | spin_lock_irqsave(shost->host_lock, flags); | |
1577 | list_del(&rport->peers); | |
1578 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1579 | put_device(&shost->shost_gendev); | |
1580 | } | |
1581 | ||
1582 | /** | |
1583 | * fc_remote_port_delete - notifies the fc transport that a remote | |
1584 | * port is no longer in existence. | |
1585 | * @rport: The remote port that no longer exists | |
1586 | * | |
1587 | * The LLDD calls this routine to notify the transport that a remote | |
1588 | * port is no longer part of the topology. Note: Although a port | |
1589 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae JSEC |
1590 | * ports displayed by the fc_host. We do this under 2 conditions: |
1591 | * - If the port was a scsi target, we delay its deletion by "blocking" it. | |
1592 | * This allows the port to temporarily disappear, then reappear without | |
1593 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
1594 | * period the port will still exist. | |
1595 | * - If the port was a scsi target and disappears for longer than we | |
1596 | * expect, we'll delete the port and the tear down the SCSI device tree | |
1597 | * attached to it. However, we want to semi-persist the target id assigned | |
1598 | * to that port if it eventually does exist. The port structure will | |
1599 | * remain (although with minimal information) so that the target id | |
1600 | * bindings remails. | |
1da177e4 LT |
1601 | * |
1602 | * If the remote port is not an FCP Target, it will be fully torn down | |
1603 | * and deallocated, including the fc_remote_port class device. | |
1604 | * | |
19a7b4ae JSEC |
1605 | * If the remote port is an FCP Target, the port will be placed in a |
1606 | * temporary blocked state. From the LLDD's perspective, the rport no | |
1607 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
1608 | * exists, but all sdevs on it are blocked from further I/O. The following | |
1609 | * is then expected: | |
1610 | * If the remote port does not return (signaled by a LLDD call to | |
1611 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
1612 | * scsi target is removed - killing all outstanding i/o and removing the | |
1613 | * scsi devices attached ot it. The port structure will be marked Not | |
1614 | * Present and be partially cleared, leaving only enough information to | |
1615 | * recognize the remote port relative to the scsi target id binding if | |
1616 | * it later appears. The port will remain as long as there is a valid | |
1617 | * binding (e.g. until the user changes the binding type or unloads the | |
1618 | * scsi host with the binding). | |
1da177e4 | 1619 | * |
19a7b4ae JSEC |
1620 | * If the remote port returns within the dev_loss_tmo value (and matches |
1621 | * according to the target id binding type), the port structure will be | |
1622 | * reused. If it is no longer a SCSI target, the target will be torn | |
1623 | * down. If it continues to be a SCSI target, then the target will be | |
1624 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
1625 | * to ensure that all luns are detected. | |
1626 | * | |
1627 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
1628 | * |
1629 | * Notes: | |
1630 | * This routine assumes no locks are held on entry. | |
1631 | **/ | |
1632 | void | |
1633 | fc_remote_port_delete(struct fc_rport *rport) | |
1634 | { | |
19a7b4ae | 1635 | int timeout = rport->dev_loss_tmo; |
1da177e4 | 1636 | |
19a7b4ae JSEC |
1637 | /* If no scsi target id mapping, delete it */ |
1638 | if (rport->scsi_target_id == -1) { | |
1da177e4 LT |
1639 | fc_rport_terminate(rport); |
1640 | return; | |
1641 | } | |
1642 | ||
19a7b4ae | 1643 | scsi_target_block(&rport->dev); |
1da177e4 | 1644 | |
19a7b4ae JSEC |
1645 | /* cap the length the devices can be blocked until they are deleted */ |
1646 | schedule_delayed_work(&rport->dev_loss_work, timeout * HZ); | |
1da177e4 | 1647 | |
19a7b4ae | 1648 | rport->port_state = FC_PORTSTATE_BLOCKED; |
1da177e4 LT |
1649 | } |
1650 | EXPORT_SYMBOL(fc_remote_port_delete); | |
1651 | ||
1652 | /** | |
1653 | * fc_remote_port_rolechg - notifies the fc transport that the roles | |
1654 | * on a remote may have changed. | |
1655 | * @rport: The remote port that changed. | |
1656 | * | |
1657 | * The LLDD calls this routine to notify the transport that the roles | |
1658 | * on a remote port may have changed. The largest effect of this is | |
1659 | * if a port now becomes a FCP Target, it must be allocated a | |
1660 | * scsi target id. If the port is no longer a FCP target, any | |
1661 | * scsi target id value assigned to it will persist in case the | |
1662 | * role changes back to include FCP Target. No changes in the scsi | |
1663 | * midlayer will be invoked if the role changes (in the expectation | |
1664 | * that the role will be resumed. If it doesn't normal error processing | |
1665 | * will take place). | |
1666 | * | |
1667 | * Should not be called from interrupt context. | |
1668 | * | |
1669 | * Notes: | |
1670 | * This routine assumes no locks are held on entry. | |
1671 | **/ | |
1672 | void | |
1673 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
1674 | { | |
1675 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1676 | struct fc_host_attrs *fc_host = | |
1677 | (struct fc_host_attrs *)shost->shost_data; | |
1678 | unsigned long flags; | |
1679 | int create = 0; | |
1680 | ||
1da177e4 | 1681 | spin_lock_irqsave(shost->host_lock, flags); |
19a7b4ae JSEC |
1682 | if (roles & FC_RPORT_ROLE_FCP_TARGET) { |
1683 | if (rport->scsi_target_id == -1) { | |
1684 | rport->scsi_target_id = fc_host->next_target_id++; | |
1685 | create = 1; | |
1686 | } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) | |
1687 | create = 1; | |
1da177e4 LT |
1688 | } |
1689 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1690 | ||
19a7b4ae JSEC |
1691 | rport->roles = roles; |
1692 | ||
1693 | if (create) { | |
1694 | /* | |
1695 | * There may have been a delete timer running on the | |
1696 | * port. Ensure that it is cancelled as we now know | |
1697 | * the port is an FCP Target. | |
1698 | * Note: we know the rport is exists and in an online | |
1699 | * state as the LLDD would not have had an rport | |
1700 | * reference to pass us. | |
1701 | * | |
1702 | * Take no action on the del_timer failure as the state | |
1703 | * machine state change will validate the | |
1704 | * transaction. | |
1705 | */ | |
1706 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
1707 | flush_scheduled_work(); | |
1708 | ||
1da177e4 LT |
1709 | /* initiate a scan of the target */ |
1710 | scsi_queue_work(shost, &rport->scan_work); | |
19a7b4ae | 1711 | } |
1da177e4 LT |
1712 | } |
1713 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
1714 | ||
1715 | /** | |
19a7b4ae JSEC |
1716 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that |
1717 | * was a SCSI target (thus was blocked), and failed | |
1718 | * to return in the alloted time. | |
1719 | * | |
1720 | * @data: rport target that failed to reappear in the alloted time. | |
1da177e4 LT |
1721 | **/ |
1722 | static void | |
19a7b4ae | 1723 | fc_timeout_deleted_rport(void *data) |
1da177e4 LT |
1724 | { |
1725 | struct fc_rport *rport = (struct fc_rport *)data; | |
19a7b4ae JSEC |
1726 | struct Scsi_Host *shost = rport_to_shost(rport); |
1727 | unsigned long flags; | |
1da177e4 | 1728 | |
19a7b4ae | 1729 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 LT |
1730 | |
1731 | /* | |
19a7b4ae JSEC |
1732 | * If the port is ONLINE, then it came back, but was no longer an |
1733 | * FCP target. Thus we need to tear down the scsi_target on it. | |
1da177e4 | 1734 | */ |
19a7b4ae JSEC |
1735 | if (rport->port_state == FC_PORTSTATE_ONLINE) { |
1736 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 | 1737 | |
19a7b4ae JSEC |
1738 | dev_printk(KERN_ERR, &rport->dev, |
1739 | "blocked FC remote port time out: removing target\n"); | |
1da177e4 | 1740 | |
19a7b4ae | 1741 | fc_rport_tgt_remove(rport); |
1da177e4 | 1742 | |
19a7b4ae JSEC |
1743 | return; |
1744 | } | |
1da177e4 | 1745 | |
19a7b4ae JSEC |
1746 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
1747 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1748 | dev_printk(KERN_ERR, &rport->dev, | |
1749 | "blocked FC remote port time out: leaving target alone\n"); | |
1750 | return; | |
1751 | } | |
1da177e4 | 1752 | |
19a7b4ae JSEC |
1753 | if (fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE) { |
1754 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1755 | dev_printk(KERN_ERR, &rport->dev, | |
1756 | "blocked FC remote port time out: removing target\n"); | |
1757 | fc_rport_terminate(rport); | |
1758 | return; | |
1759 | } | |
1da177e4 | 1760 | |
19a7b4ae JSEC |
1761 | dev_printk(KERN_ERR, &rport->dev, |
1762 | "blocked FC remote port time out: removing target and " | |
1763 | "saving binding\n"); | |
1764 | ||
1765 | list_move_tail(&rport->peers, &fc_host_rport_bindings(shost)); | |
1da177e4 LT |
1766 | |
1767 | /* | |
19a7b4ae JSEC |
1768 | * Note: We do not remove or clear the hostdata area. This allows |
1769 | * host-specific target data to persist along with the | |
1770 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 1771 | */ |
1da177e4 | 1772 | |
19a7b4ae JSEC |
1773 | /* |
1774 | * Reinitialize port attributes that may change if the port comes back. | |
1775 | */ | |
1776 | rport->maxframe_size = -1; | |
1777 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1778 | rport->roles = FC_RPORT_ROLE_UNKNOWN; | |
42e33148 | 1779 | rport->port_state = FC_PORTSTATE_DELETED; |
1da177e4 | 1780 | |
19a7b4ae JSEC |
1781 | /* remove the identifiers that aren't used in the consisting binding */ |
1782 | switch (fc_host_tgtid_bind_type(shost)) { | |
1783 | case FC_TGTID_BIND_BY_WWPN: | |
1784 | rport->node_name = -1; | |
1785 | rport->port_id = -1; | |
1786 | break; | |
1787 | case FC_TGTID_BIND_BY_WWNN: | |
1788 | rport->port_name = -1; | |
1789 | rport->port_id = -1; | |
1790 | break; | |
1791 | case FC_TGTID_BIND_BY_ID: | |
1792 | rport->node_name = -1; | |
1793 | rport->port_name = -1; | |
1794 | break; | |
1795 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
1796 | break; | |
1797 | } | |
1798 | ||
19a7b4ae JSEC |
1799 | /* |
1800 | * As this only occurs if the remote port (scsi target) | |
1801 | * went away and didn't come back - we'll remove | |
1802 | * all attached scsi devices. | |
42e33148 JSEC |
1803 | * |
1804 | * We'll schedule the shost work item to perform the actual removal | |
1805 | * to avoid recursion in the different flush calls if we perform | |
1806 | * the removal in each target - and there are lots of targets | |
1807 | * whose timeouts fire at the same time. | |
19a7b4ae | 1808 | */ |
42e33148 JSEC |
1809 | |
1810 | if ( !(fc_host_flags(shost) & FC_SHOST_RPORT_DEL_SCHEDULED)) { | |
1811 | fc_host_flags(shost) |= FC_SHOST_RPORT_DEL_SCHEDULED; | |
1812 | scsi_queue_work(shost, &fc_host_rport_del_work(shost)); | |
1813 | } | |
1814 | ||
1815 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 | 1816 | } |
1da177e4 LT |
1817 | |
1818 | /** | |
1819 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
19a7b4ae JSEC |
1820 | * |
1821 | * Will unblock the target (in case it went away and has now come back), | |
1822 | * then invoke a scan. | |
1823 | * | |
1da177e4 LT |
1824 | * @data: remote port to be scanned. |
1825 | **/ | |
1826 | static void | |
1827 | fc_scsi_scan_rport(void *data) | |
1828 | { | |
1829 | struct fc_rport *rport = (struct fc_rport *)data; | |
1830 | ||
19a7b4ae | 1831 | scsi_target_unblock(&rport->dev); |
1da177e4 LT |
1832 | scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id, |
1833 | SCAN_WILD_CARD, 1); | |
1834 | } | |
1835 | ||
1836 | ||
42e33148 JSEC |
1837 | /** |
1838 | * fc_shost_remove_rports - called to remove all rports that are marked | |
1839 | * as in a deleted (not connected) state. | |
1840 | * | |
1841 | * @data: shost whose rports are to be looked at | |
1842 | **/ | |
1843 | static void | |
1844 | fc_shost_remove_rports(void *data) | |
1845 | { | |
1846 | struct Scsi_Host *shost = (struct Scsi_Host *)data; | |
1847 | struct fc_rport *rport, *next_rport; | |
1848 | unsigned long flags; | |
1849 | ||
1850 | spin_lock_irqsave(shost->host_lock, flags); | |
1851 | while (fc_host_flags(shost) & FC_SHOST_RPORT_DEL_SCHEDULED) { | |
1852 | ||
1853 | fc_host_flags(shost) &= ~FC_SHOST_RPORT_DEL_SCHEDULED; | |
1854 | ||
1855 | restart_search: | |
1856 | list_for_each_entry_safe(rport, next_rport, | |
1857 | &fc_host_rport_bindings(shost), peers) { | |
1858 | if (rport->port_state == FC_PORTSTATE_DELETED) { | |
1859 | rport->port_state = FC_PORTSTATE_NOTPRESENT; | |
1860 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1861 | fc_rport_tgt_remove(rport); | |
1862 | spin_lock_irqsave(shost->host_lock, flags); | |
1863 | goto restart_search; | |
1864 | } | |
1865 | } | |
1866 | ||
1867 | } | |
1868 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1869 | } | |
1870 | ||
1871 | ||
1da177e4 LT |
1872 | MODULE_AUTHOR("Martin Hicks"); |
1873 | MODULE_DESCRIPTION("FC Transport Attributes"); | |
1874 | MODULE_LICENSE("GPL"); | |
1875 | ||
1876 | module_init(fc_transport_init); | |
1877 | module_exit(fc_transport_exit); |