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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" }, | |
108 | }; | |
109 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
110 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
111 | ||
112 | ||
113 | /* Convert fc_tgtid_binding_type values to ascii string name */ | |
0ad78200 | 114 | static const struct { |
1da177e4 LT |
115 | enum fc_tgtid_binding_type value; |
116 | char *name; | |
117 | int matchlen; | |
118 | } fc_tgtid_binding_type_names[] = { | |
119 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
120 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
121 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
122 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
123 | }; | |
124 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
125 | fc_tgtid_binding_type_names) | |
126 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
127 | fc_tgtid_binding_type_names) | |
128 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
129 | ||
130 | ||
131 | #define fc_bitfield_name_search(title, table) \ | |
132 | static ssize_t \ | |
133 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
134 | { \ | |
135 | char *prefix = ""; \ | |
136 | ssize_t len = 0; \ | |
137 | int i; \ | |
138 | \ | |
139 | for (i = 0; i < sizeof(table)/sizeof(table[0]); i++) { \ | |
140 | if (table[i].value & table_key) { \ | |
141 | len += sprintf(buf + len, "%s%s", \ | |
142 | prefix, table[i].name); \ | |
143 | prefix = ", "; \ | |
144 | } \ | |
145 | } \ | |
146 | len += sprintf(buf + len, "\n"); \ | |
147 | return len; \ | |
148 | } | |
149 | ||
150 | ||
151 | /* Convert FC_COS bit values to ascii string name */ | |
0ad78200 | 152 | static const struct { |
1da177e4 LT |
153 | u32 value; |
154 | char *name; | |
155 | } fc_cos_names[] = { | |
156 | { FC_COS_CLASS1, "Class 1" }, | |
157 | { FC_COS_CLASS2, "Class 2" }, | |
158 | { FC_COS_CLASS3, "Class 3" }, | |
159 | { FC_COS_CLASS4, "Class 4" }, | |
160 | { FC_COS_CLASS6, "Class 6" }, | |
161 | }; | |
162 | fc_bitfield_name_search(cos, fc_cos_names) | |
163 | ||
164 | ||
165 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
0ad78200 | 166 | static const struct { |
1da177e4 LT |
167 | u32 value; |
168 | char *name; | |
169 | } fc_port_speed_names[] = { | |
170 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
171 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
172 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
173 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
174 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, | |
175 | }; | |
176 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
177 | ||
178 | ||
179 | static int | |
180 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
181 | { | |
182 | int i, len=0; | |
183 | ||
184 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
185 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
186 | len += sprintf(buf + len, "\n"); | |
187 | return len; | |
188 | } | |
189 | ||
190 | ||
191 | /* Convert FC_RPORT_ROLE bit values to ascii string name */ | |
0ad78200 | 192 | static const struct { |
1da177e4 LT |
193 | u32 value; |
194 | char *name; | |
195 | } fc_remote_port_role_names[] = { | |
196 | { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" }, | |
197 | { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
198 | { FC_RPORT_ROLE_IP_PORT, "IP Port" }, | |
199 | }; | |
200 | fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names) | |
201 | ||
202 | /* | |
203 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
204 | */ | |
205 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
206 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
207 | #define FC_FPORT_PORTID 0x00000e | |
208 | #define FC_FABCTLR_PORTID 0x00000d | |
209 | #define FC_DIRSRVR_PORTID 0x00000c | |
210 | #define FC_TIMESRVR_PORTID 0x00000b | |
211 | #define FC_MGMTSRVR_PORTID 0x00000a | |
212 | ||
213 | ||
19a7b4ae | 214 | static void fc_timeout_deleted_rport(void *data); |
1da177e4 LT |
215 | static void fc_scsi_scan_rport(void *data); |
216 | static void fc_rport_terminate(struct fc_rport *rport); | |
217 | ||
218 | /* | |
219 | * Attribute counts pre object type... | |
220 | * Increase these values if you add attributes | |
221 | */ | |
222 | #define FC_STARGET_NUM_ATTRS 3 | |
223 | #define FC_RPORT_NUM_ATTRS 9 | |
91ca7b01 | 224 | #define FC_HOST_NUM_ATTRS 16 |
1da177e4 LT |
225 | |
226 | struct fc_internal { | |
227 | struct scsi_transport_template t; | |
228 | struct fc_function_template *f; | |
229 | ||
230 | /* | |
231 | * For attributes : each object has : | |
232 | * An array of the actual attributes structures | |
233 | * An array of null-terminated pointers to the attribute | |
234 | * structures - used for mid-layer interaction. | |
235 | * | |
236 | * The attribute containers for the starget and host are are | |
237 | * part of the midlayer. As the remote port is specific to the | |
238 | * fc transport, we must provide the attribute container. | |
239 | */ | |
240 | struct class_device_attribute private_starget_attrs[ | |
241 | FC_STARGET_NUM_ATTRS]; | |
242 | struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; | |
243 | ||
244 | struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; | |
245 | struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
246 | ||
247 | struct transport_container rport_attr_cont; | |
248 | struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; | |
249 | struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
250 | }; | |
251 | ||
252 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
253 | ||
d0a7e574 JB |
254 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
255 | struct class_device *cdev) | |
1da177e4 LT |
256 | { |
257 | struct scsi_target *starget = to_scsi_target(dev); | |
258 | struct fc_rport *rport = starget_to_rport(starget); | |
259 | ||
260 | /* | |
261 | * if parent is remote port, use values from remote port. | |
262 | * Otherwise, this host uses the fc_transport, but not the | |
263 | * remote port interface. As such, initialize to known non-values. | |
264 | */ | |
265 | if (rport) { | |
266 | fc_starget_node_name(starget) = rport->node_name; | |
267 | fc_starget_port_name(starget) = rport->port_name; | |
268 | fc_starget_port_id(starget) = rport->port_id; | |
269 | } else { | |
270 | fc_starget_node_name(starget) = -1; | |
271 | fc_starget_port_name(starget) = -1; | |
272 | fc_starget_port_id(starget) = -1; | |
273 | } | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
278 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
279 | "fc_transport", | |
280 | fc_target_setup, | |
281 | NULL, | |
282 | NULL); | |
283 | ||
d0a7e574 JB |
284 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
285 | struct class_device *cdev) | |
1da177e4 LT |
286 | { |
287 | struct Scsi_Host *shost = dev_to_shost(dev); | |
288 | ||
289 | /* | |
290 | * Set default values easily detected by the midlayer as | |
291 | * failure cases. The scsi lldd is responsible for initializing | |
292 | * all transport attributes to valid values per host. | |
293 | */ | |
294 | fc_host_node_name(shost) = -1; | |
295 | fc_host_port_name(shost) = -1; | |
296 | fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED; | |
297 | memset(fc_host_supported_fc4s(shost), 0, | |
298 | sizeof(fc_host_supported_fc4s(shost))); | |
299 | memset(fc_host_symbolic_name(shost), 0, | |
300 | sizeof(fc_host_symbolic_name(shost))); | |
301 | fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN; | |
302 | fc_host_maxframe_size(shost) = -1; | |
303 | memset(fc_host_serial_number(shost), 0, | |
304 | sizeof(fc_host_serial_number(shost))); | |
305 | ||
306 | fc_host_port_id(shost) = -1; | |
307 | fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; | |
308 | fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; | |
309 | memset(fc_host_active_fc4s(shost), 0, | |
310 | sizeof(fc_host_active_fc4s(shost))); | |
311 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
312 | fc_host_fabric_name(shost) = -1; | |
313 | ||
314 | fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN; | |
315 | ||
316 | INIT_LIST_HEAD(&fc_host_rports(shost)); | |
317 | INIT_LIST_HEAD(&fc_host_rport_bindings(shost)); | |
318 | fc_host_next_rport_number(shost) = 0; | |
319 | fc_host_next_target_id(shost) = 0; | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
325 | "fc_host", | |
326 | fc_host_setup, | |
327 | NULL, | |
328 | NULL); | |
329 | ||
330 | /* | |
331 | * Setup and Remove actions for remote ports are handled | |
332 | * in the service functions below. | |
333 | */ | |
334 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
335 | "fc_remote_ports", | |
336 | NULL, | |
337 | NULL, | |
338 | NULL); | |
339 | ||
340 | /* | |
341 | * Module Parameters | |
342 | */ | |
343 | ||
344 | /* | |
345 | * dev_loss_tmo: the default number of seconds that the FC transport | |
346 | * should insulate the loss of a remote port. | |
347 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
348 | */ | |
349 | static unsigned int fc_dev_loss_tmo = SCSI_DEVICE_BLOCK_MAX_TIMEOUT; | |
350 | ||
351 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR); | |
352 | MODULE_PARM_DESC(dev_loss_tmo, | |
353 | "Maximum number of seconds that the FC transport should" | |
354 | " insulate the loss of a remote port. Once this value is" | |
355 | " exceeded, the scsi target is removed. Value should be" | |
356 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); | |
357 | ||
358 | ||
359 | static __init int fc_transport_init(void) | |
360 | { | |
361 | int error = transport_class_register(&fc_host_class); | |
362 | if (error) | |
363 | return error; | |
364 | error = transport_class_register(&fc_rport_class); | |
365 | if (error) | |
366 | return error; | |
367 | return transport_class_register(&fc_transport_class); | |
368 | } | |
369 | ||
370 | static void __exit fc_transport_exit(void) | |
371 | { | |
372 | transport_class_unregister(&fc_transport_class); | |
373 | transport_class_unregister(&fc_rport_class); | |
374 | transport_class_unregister(&fc_host_class); | |
375 | } | |
376 | ||
377 | /* | |
378 | * FC Remote Port Attribute Management | |
379 | */ | |
380 | ||
381 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
382 | static ssize_t \ | |
383 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
384 | { \ | |
385 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
386 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
387 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
388 | if ((i->f->get_rport_##field) && \ |
389 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
390 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ | |
1da177e4 LT |
391 | i->f->get_rport_##field(rport); \ |
392 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
393 | } | |
394 | ||
395 | #define fc_rport_store_function(field) \ | |
396 | static ssize_t \ | |
397 | store_fc_rport_##field(struct class_device *cdev, const char *buf, \ | |
398 | size_t count) \ | |
399 | { \ | |
400 | int val; \ | |
401 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
402 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
403 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
404 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
405 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ | |
406 | return -EBUSY; \ | |
1da177e4 LT |
407 | val = simple_strtoul(buf, NULL, 0); \ |
408 | i->f->set_rport_##field(rport, val); \ | |
409 | return count; \ | |
410 | } | |
411 | ||
412 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
413 | fc_rport_show_function(field, format_string, sz, ) \ | |
414 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
415 | show_fc_rport_##field, NULL) | |
416 | ||
417 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
418 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
419 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
420 | show_fc_rport_##field, NULL) | |
421 | ||
422 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
423 | fc_rport_show_function(field, format_string, sz, ) \ | |
424 | fc_rport_store_function(field) \ | |
425 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ | |
426 | show_fc_rport_##field, \ | |
427 | store_fc_rport_##field) | |
428 | ||
429 | ||
430 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
431 | static ssize_t \ | |
432 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
433 | { \ | |
434 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
435 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
436 | } | |
437 | ||
438 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
439 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
440 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
441 | show_fc_rport_##field, NULL) | |
442 | ||
443 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
444 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
445 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
446 | show_fc_rport_##field, NULL) | |
447 | ||
448 | ||
449 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
450 | static ssize_t \ | |
451 | show_fc_rport_##title (struct class_device *cdev, char *buf) \ | |
452 | { \ | |
453 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
454 | const char *name; \ | |
455 | name = get_fc_##title##_name(rport->title); \ | |
456 | if (!name) \ | |
457 | return -EINVAL; \ | |
458 | return snprintf(buf, maxlen, "%s\n", name); \ | |
459 | } \ | |
460 | static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \ | |
461 | show_fc_rport_##title, NULL) | |
462 | ||
463 | ||
464 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
465 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
466 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
467 | i->private_rport_attrs[count].store = NULL; \ | |
468 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
469 | if (i->f->show_rport_##field) \ | |
470 | count++ | |
471 | ||
472 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
473 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
474 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
475 | i->private_rport_attrs[count].store = NULL; \ | |
476 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
477 | count++ | |
478 | ||
479 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
480 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
481 | if (!i->f->set_rport_##field) { \ | |
482 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
483 | i->private_rport_attrs[count].store = NULL; \ | |
484 | } \ | |
485 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
486 | if (i->f->show_rport_##field) \ | |
487 | count++ | |
488 | ||
489 | ||
490 | /* The FC Transport Remote Port Attributes: */ | |
491 | ||
492 | /* Fixed Remote Port Attributes */ | |
493 | ||
494 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
495 | ||
496 | static ssize_t | |
497 | show_fc_rport_supported_classes (struct class_device *cdev, char *buf) | |
498 | { | |
499 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
500 | if (rport->supported_classes == FC_COS_UNSPECIFIED) | |
501 | return snprintf(buf, 20, "unspecified\n"); | |
502 | return get_fc_cos_names(rport->supported_classes, buf); | |
503 | } | |
504 | static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO, | |
505 | show_fc_rport_supported_classes, NULL); | |
506 | ||
507 | /* Dynamic Remote Port Attributes */ | |
508 | ||
19a7b4ae JSEC |
509 | /* |
510 | * dev_loss_tmo attribute | |
511 | */ | |
512 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
513 | static ssize_t | |
514 | store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf, | |
515 | size_t count) | |
516 | { | |
517 | int val; | |
518 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
519 | struct Scsi_Host *shost = rport_to_shost(rport); | |
520 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
521 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
522 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) | |
523 | return -EBUSY; | |
524 | val = simple_strtoul(buf, NULL, 0); | |
525 | if ((val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
526 | return -EINVAL; | |
527 | i->f->set_rport_dev_loss_tmo(rport, val); | |
528 | return count; | |
529 | } | |
530 | static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, | |
531 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); | |
1da177e4 LT |
532 | |
533 | ||
534 | /* Private Remote Port Attributes */ | |
535 | ||
536 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
537 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
538 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
539 | ||
540 | static ssize_t | |
541 | show_fc_rport_roles (struct class_device *cdev, char *buf) | |
542 | { | |
543 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
544 | ||
545 | /* identify any roles that are port_id specific */ | |
546 | if ((rport->port_id != -1) && | |
547 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
548 | FC_WELLKNOWN_PORTID_MASK) { | |
549 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
550 | case FC_FPORT_PORTID: | |
551 | return snprintf(buf, 30, "Fabric Port\n"); | |
552 | case FC_FABCTLR_PORTID: | |
553 | return snprintf(buf, 30, "Fabric Controller\n"); | |
554 | case FC_DIRSRVR_PORTID: | |
555 | return snprintf(buf, 30, "Directory Server\n"); | |
556 | case FC_TIMESRVR_PORTID: | |
557 | return snprintf(buf, 30, "Time Server\n"); | |
558 | case FC_MGMTSRVR_PORTID: | |
559 | return snprintf(buf, 30, "Management Server\n"); | |
560 | default: | |
561 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
562 | } | |
563 | } else { | |
564 | if (rport->roles == FC_RPORT_ROLE_UNKNOWN) | |
565 | return snprintf(buf, 20, "unknown\n"); | |
566 | return get_fc_remote_port_roles_names(rport->roles, buf); | |
567 | } | |
568 | } | |
569 | static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO, | |
570 | show_fc_rport_roles, NULL); | |
571 | ||
572 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
573 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
574 | ||
575 | ||
576 | ||
577 | /* | |
578 | * FC SCSI Target Attribute Management | |
579 | */ | |
580 | ||
581 | /* | |
582 | * Note: in the target show function we recognize when the remote | |
583 | * port is in the heirarchy and do not allow the driver to get | |
584 | * involved in sysfs functions. The driver only gets involved if | |
585 | * it's the "old" style that doesn't use rports. | |
586 | */ | |
587 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
588 | static ssize_t \ | |
589 | show_fc_starget_##field (struct class_device *cdev, char *buf) \ | |
590 | { \ | |
591 | struct scsi_target *starget = transport_class_to_starget(cdev); \ | |
592 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ | |
593 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
594 | struct fc_rport *rport = starget_to_rport(starget); \ | |
595 | if (rport) \ | |
596 | fc_starget_##field(starget) = rport->field; \ | |
597 | else if (i->f->get_starget_##field) \ | |
598 | i->f->get_starget_##field(starget); \ | |
599 | return snprintf(buf, sz, format_string, \ | |
600 | cast fc_starget_##field(starget)); \ | |
601 | } | |
602 | ||
603 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
604 | fc_starget_show_function(field, format_string, sz, ) \ | |
605 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
606 | show_fc_starget_##field, NULL) | |
607 | ||
608 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
609 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
610 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
611 | show_fc_starget_##field, NULL) | |
612 | ||
613 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
614 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
615 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
616 | i->private_starget_attrs[count].store = NULL; \ | |
617 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
618 | if (i->f->show_starget_##field) \ | |
619 | count++ | |
620 | ||
621 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
622 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
623 | if (!i->f->set_starget_##field) { \ | |
624 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
625 | i->private_starget_attrs[count].store = NULL; \ | |
626 | } \ | |
627 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
628 | if (i->f->show_starget_##field) \ | |
629 | count++ | |
630 | ||
631 | /* The FC Transport SCSI Target Attributes: */ | |
632 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
633 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
634 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
635 | ||
636 | ||
637 | /* | |
638 | * Host Attribute Management | |
639 | */ | |
640 | ||
641 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
642 | static ssize_t \ | |
643 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
644 | { \ | |
645 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
646 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
647 | if (i->f->get_host_##field) \ | |
648 | i->f->get_host_##field(shost); \ | |
649 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
650 | } | |
651 | ||
652 | #define fc_host_store_function(field) \ | |
653 | static ssize_t \ | |
654 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
655 | size_t count) \ | |
656 | { \ | |
657 | int val; \ | |
658 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
659 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
660 | \ | |
661 | val = simple_strtoul(buf, NULL, 0); \ | |
662 | i->f->set_host_##field(shost, val); \ | |
663 | return count; \ | |
664 | } | |
665 | ||
666 | #define fc_host_rd_attr(field, format_string, sz) \ | |
667 | fc_host_show_function(field, format_string, sz, ) \ | |
668 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
669 | show_fc_host_##field, NULL) | |
670 | ||
671 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
672 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
673 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
674 | show_fc_host_##field, NULL) | |
675 | ||
676 | #define fc_host_rw_attr(field, format_string, sz) \ | |
677 | fc_host_show_function(field, format_string, sz, ) \ | |
678 | fc_host_store_function(field) \ | |
679 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ | |
680 | show_fc_host_##field, \ | |
681 | store_fc_host_##field) | |
682 | ||
683 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
684 | static ssize_t \ | |
685 | show_fc_host_##title (struct class_device *cdev, char *buf) \ | |
686 | { \ | |
687 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
688 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
689 | const char *name; \ | |
690 | if (i->f->get_host_##title) \ | |
691 | i->f->get_host_##title(shost); \ | |
692 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
693 | if (!name) \ | |
694 | return -EINVAL; \ | |
695 | return snprintf(buf, maxlen, "%s\n", name); \ | |
696 | } \ | |
697 | static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) | |
698 | ||
699 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
700 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
701 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
702 | i->private_host_attrs[count].store = NULL; \ | |
703 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
704 | if (i->f->show_host_##field) \ | |
705 | count++ | |
706 | ||
707 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ | |
708 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
709 | if (!i->f->set_host_##field) { \ | |
710 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
711 | i->private_host_attrs[count].store = NULL; \ | |
712 | } \ | |
713 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
714 | if (i->f->show_host_##field) \ | |
715 | count++ | |
716 | ||
717 | ||
718 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
719 | static ssize_t \ | |
720 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
721 | { \ | |
722 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
723 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
724 | } | |
725 | ||
726 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
727 | fc_private_host_show_function(field, format_string, sz, ) \ | |
728 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
729 | show_fc_host_##field, NULL) | |
730 | ||
731 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
732 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
733 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
734 | show_fc_host_##field, NULL) | |
735 | ||
736 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
737 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
738 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
739 | i->private_host_attrs[count].store = NULL; \ | |
740 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
741 | count++ | |
742 | ||
743 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 744 | { \ |
1da177e4 LT |
745 | i->private_host_attrs[count] = class_device_attr_host_##field; \ |
746 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
91ca7b01 AV |
747 | count++; \ |
748 | } | |
1da177e4 LT |
749 | |
750 | ||
751 | /* Fixed Host Attributes */ | |
752 | ||
753 | static ssize_t | |
754 | show_fc_host_supported_classes (struct class_device *cdev, char *buf) | |
755 | { | |
756 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
757 | ||
758 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
759 | return snprintf(buf, 20, "unspecified\n"); | |
760 | ||
761 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
762 | } | |
763 | static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, | |
764 | show_fc_host_supported_classes, NULL); | |
765 | ||
766 | static ssize_t | |
767 | show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) | |
768 | { | |
769 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
770 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); | |
771 | } | |
772 | static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, | |
773 | show_fc_host_supported_fc4s, NULL); | |
774 | ||
775 | static ssize_t | |
776 | show_fc_host_supported_speeds (struct class_device *cdev, char *buf) | |
777 | { | |
778 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
779 | ||
780 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
781 | return snprintf(buf, 20, "unknown\n"); | |
782 | ||
783 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
784 | } | |
785 | static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, | |
786 | show_fc_host_supported_speeds, NULL); | |
787 | ||
788 | ||
789 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
790 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
791 | fc_private_host_rd_attr(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1)); | |
792 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); | |
793 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); | |
794 | ||
795 | ||
796 | /* Dynamic Host Attributes */ | |
797 | ||
798 | static ssize_t | |
799 | show_fc_host_active_fc4s (struct class_device *cdev, char *buf) | |
800 | { | |
801 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
802 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
803 | ||
804 | if (i->f->get_host_active_fc4s) | |
805 | i->f->get_host_active_fc4s(shost); | |
806 | ||
807 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
808 | } | |
809 | static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, | |
810 | show_fc_host_active_fc4s, NULL); | |
811 | ||
812 | static ssize_t | |
813 | show_fc_host_speed (struct class_device *cdev, char *buf) | |
814 | { | |
815 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
816 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
817 | ||
818 | if (i->f->get_host_speed) | |
819 | i->f->get_host_speed(shost); | |
820 | ||
821 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
822 | return snprintf(buf, 20, "unknown\n"); | |
823 | ||
824 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
825 | } | |
826 | static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, | |
827 | show_fc_host_speed, NULL); | |
828 | ||
829 | ||
830 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
831 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
832 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
833 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
834 | ||
835 | ||
836 | /* Private Host Attributes */ | |
837 | ||
838 | static ssize_t | |
839 | show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) | |
840 | { | |
841 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
842 | const char *name; | |
843 | ||
844 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
845 | if (!name) | |
846 | return -EINVAL; | |
847 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
848 | } | |
849 | ||
d16794f6 JSEC |
850 | #define get_list_head_entry(pos, head, member) \ |
851 | pos = list_entry((head)->next, typeof(*pos), member) | |
852 | ||
1da177e4 LT |
853 | static ssize_t |
854 | store_fc_private_host_tgtid_bind_type(struct class_device *cdev, | |
855 | const char *buf, size_t count) | |
856 | { | |
857 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
d16794f6 | 858 | struct fc_rport *rport; |
1da177e4 LT |
859 | enum fc_tgtid_binding_type val; |
860 | unsigned long flags; | |
861 | ||
862 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
863 | return -EINVAL; | |
864 | ||
865 | /* if changing bind type, purge all unused consistent bindings */ | |
866 | if (val != fc_host_tgtid_bind_type(shost)) { | |
867 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
868 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
869 | get_list_head_entry(rport, | |
870 | &fc_host_rport_bindings(shost), peers); | |
871 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 | 872 | fc_rport_terminate(rport); |
d16794f6 JSEC |
873 | spin_lock_irqsave(shost->host_lock, flags); |
874 | } | |
1da177e4 LT |
875 | spin_unlock_irqrestore(shost->host_lock, flags); |
876 | } | |
877 | ||
878 | fc_host_tgtid_bind_type(shost) = val; | |
879 | return count; | |
880 | } | |
881 | ||
882 | static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, | |
883 | show_fc_private_host_tgtid_bind_type, | |
884 | store_fc_private_host_tgtid_bind_type); | |
885 | ||
91ca7b01 AV |
886 | static ssize_t |
887 | store_fc_private_host_issue_lip(struct class_device *cdev, | |
888 | const char *buf, size_t count) | |
889 | { | |
890 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
891 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
892 | int ret; | |
893 | ||
894 | /* ignore any data value written to the attribute */ | |
895 | if (i->f->issue_fc_host_lip) { | |
896 | ret = i->f->issue_fc_host_lip(shost); | |
897 | return ret ? ret: count; | |
898 | } | |
899 | ||
900 | return -ENOENT; | |
901 | } | |
902 | ||
903 | static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, | |
904 | store_fc_private_host_issue_lip); | |
905 | ||
1da177e4 LT |
906 | /* |
907 | * Host Statistics Management | |
908 | */ | |
909 | ||
910 | /* Show a given an attribute in the statistics group */ | |
911 | static ssize_t | |
912 | fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) | |
913 | { | |
914 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
915 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
916 | struct fc_host_statistics *stats; | |
917 | ssize_t ret = -ENOENT; | |
918 | ||
919 | if (offset > sizeof(struct fc_host_statistics) || | |
920 | offset % sizeof(u64) != 0) | |
921 | WARN_ON(1); | |
922 | ||
923 | if (i->f->get_fc_host_stats) { | |
924 | stats = (i->f->get_fc_host_stats)(shost); | |
925 | if (stats) | |
926 | ret = snprintf(buf, 20, "0x%llx\n", | |
927 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
928 | } | |
929 | return ret; | |
930 | } | |
931 | ||
932 | ||
933 | /* generate a read-only statistics attribute */ | |
934 | #define fc_host_statistic(name) \ | |
935 | static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ | |
936 | { \ | |
937 | return fc_stat_show(cd, buf, \ | |
938 | offsetof(struct fc_host_statistics, name)); \ | |
939 | } \ | |
940 | static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) | |
941 | ||
942 | fc_host_statistic(seconds_since_last_reset); | |
943 | fc_host_statistic(tx_frames); | |
944 | fc_host_statistic(tx_words); | |
945 | fc_host_statistic(rx_frames); | |
946 | fc_host_statistic(rx_words); | |
947 | fc_host_statistic(lip_count); | |
948 | fc_host_statistic(nos_count); | |
949 | fc_host_statistic(error_frames); | |
950 | fc_host_statistic(dumped_frames); | |
951 | fc_host_statistic(link_failure_count); | |
952 | fc_host_statistic(loss_of_sync_count); | |
953 | fc_host_statistic(loss_of_signal_count); | |
954 | fc_host_statistic(prim_seq_protocol_err_count); | |
955 | fc_host_statistic(invalid_tx_word_count); | |
956 | fc_host_statistic(invalid_crc_count); | |
957 | fc_host_statistic(fcp_input_requests); | |
958 | fc_host_statistic(fcp_output_requests); | |
959 | fc_host_statistic(fcp_control_requests); | |
960 | fc_host_statistic(fcp_input_megabytes); | |
961 | fc_host_statistic(fcp_output_megabytes); | |
962 | ||
963 | static ssize_t | |
964 | fc_reset_statistics(struct class_device *cdev, const char *buf, | |
965 | size_t count) | |
966 | { | |
967 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
968 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
969 | ||
970 | /* ignore any data value written to the attribute */ | |
971 | if (i->f->reset_fc_host_stats) { | |
972 | i->f->reset_fc_host_stats(shost); | |
973 | return count; | |
974 | } | |
975 | ||
976 | return -ENOENT; | |
977 | } | |
978 | static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, | |
979 | fc_reset_statistics); | |
980 | ||
981 | ||
982 | static struct attribute *fc_statistics_attrs[] = { | |
983 | &class_device_attr_host_seconds_since_last_reset.attr, | |
984 | &class_device_attr_host_tx_frames.attr, | |
985 | &class_device_attr_host_tx_words.attr, | |
986 | &class_device_attr_host_rx_frames.attr, | |
987 | &class_device_attr_host_rx_words.attr, | |
988 | &class_device_attr_host_lip_count.attr, | |
989 | &class_device_attr_host_nos_count.attr, | |
990 | &class_device_attr_host_error_frames.attr, | |
991 | &class_device_attr_host_dumped_frames.attr, | |
992 | &class_device_attr_host_link_failure_count.attr, | |
993 | &class_device_attr_host_loss_of_sync_count.attr, | |
994 | &class_device_attr_host_loss_of_signal_count.attr, | |
995 | &class_device_attr_host_prim_seq_protocol_err_count.attr, | |
996 | &class_device_attr_host_invalid_tx_word_count.attr, | |
997 | &class_device_attr_host_invalid_crc_count.attr, | |
998 | &class_device_attr_host_fcp_input_requests.attr, | |
999 | &class_device_attr_host_fcp_output_requests.attr, | |
1000 | &class_device_attr_host_fcp_control_requests.attr, | |
1001 | &class_device_attr_host_fcp_input_megabytes.attr, | |
1002 | &class_device_attr_host_fcp_output_megabytes.attr, | |
1003 | &class_device_attr_host_reset_statistics.attr, | |
1004 | NULL | |
1005 | }; | |
1006 | ||
1007 | static struct attribute_group fc_statistics_group = { | |
1008 | .name = "statistics", | |
1009 | .attrs = fc_statistics_attrs, | |
1010 | }; | |
1011 | ||
1012 | static int fc_host_match(struct attribute_container *cont, | |
1013 | struct device *dev) | |
1014 | { | |
1015 | struct Scsi_Host *shost; | |
1016 | struct fc_internal *i; | |
1017 | ||
1018 | if (!scsi_is_host_device(dev)) | |
1019 | return 0; | |
1020 | ||
1021 | shost = dev_to_shost(dev); | |
1022 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1023 | != &fc_host_class.class) | |
1024 | return 0; | |
1025 | ||
1026 | i = to_fc_internal(shost->transportt); | |
1027 | ||
1028 | return &i->t.host_attrs.ac == cont; | |
1029 | } | |
1030 | ||
1031 | static int fc_target_match(struct attribute_container *cont, | |
1032 | struct device *dev) | |
1033 | { | |
1034 | struct Scsi_Host *shost; | |
1035 | struct fc_internal *i; | |
1036 | ||
1037 | if (!scsi_is_target_device(dev)) | |
1038 | return 0; | |
1039 | ||
1040 | shost = dev_to_shost(dev->parent); | |
1041 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1042 | != &fc_host_class.class) | |
1043 | return 0; | |
1044 | ||
1045 | i = to_fc_internal(shost->transportt); | |
1046 | ||
1047 | return &i->t.target_attrs.ac == cont; | |
1048 | } | |
1049 | ||
1050 | static void fc_rport_dev_release(struct device *dev) | |
1051 | { | |
1052 | struct fc_rport *rport = dev_to_rport(dev); | |
1053 | put_device(dev->parent); | |
1054 | kfree(rport); | |
1055 | } | |
1056 | ||
1057 | int scsi_is_fc_rport(const struct device *dev) | |
1058 | { | |
1059 | return dev->release == fc_rport_dev_release; | |
1060 | } | |
1061 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1062 | ||
1063 | static int fc_rport_match(struct attribute_container *cont, | |
1064 | struct device *dev) | |
1065 | { | |
1066 | struct Scsi_Host *shost; | |
1067 | struct fc_internal *i; | |
1068 | ||
1069 | if (!scsi_is_fc_rport(dev)) | |
1070 | return 0; | |
1071 | ||
1072 | shost = dev_to_shost(dev->parent); | |
1073 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1074 | != &fc_host_class.class) | |
1075 | return 0; | |
1076 | ||
1077 | i = to_fc_internal(shost->transportt); | |
1078 | ||
1079 | return &i->rport_attr_cont.ac == cont; | |
1080 | } | |
1081 | ||
5c44cd2a JSEC |
1082 | |
1083 | /* | |
1084 | * Must be called with shost->host_lock held | |
1085 | */ | |
1086 | static struct device *fc_target_parent(struct Scsi_Host *shost, | |
1087 | int channel, uint id) | |
1088 | { | |
1089 | struct fc_rport *rport; | |
1090 | ||
1091 | list_for_each_entry(rport, &fc_host_rports(shost), peers) | |
1092 | if ((rport->channel == channel) && | |
1093 | (rport->scsi_target_id == id)) | |
1094 | return &rport->dev; | |
1095 | ||
1096 | return NULL; | |
1097 | } | |
1098 | ||
1da177e4 LT |
1099 | struct scsi_transport_template * |
1100 | fc_attach_transport(struct fc_function_template *ft) | |
1101 | { | |
1102 | struct fc_internal *i = kmalloc(sizeof(struct fc_internal), | |
1103 | GFP_KERNEL); | |
1104 | int count; | |
1105 | ||
1106 | if (unlikely(!i)) | |
1107 | return NULL; | |
1108 | ||
1109 | memset(i, 0, sizeof(struct fc_internal)); | |
1110 | ||
1111 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; | |
1112 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
1113 | i->t.target_attrs.ac.match = fc_target_match; | |
1114 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
1115 | transport_container_register(&i->t.target_attrs); | |
1116 | ||
1117 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1118 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
1119 | i->t.host_attrs.ac.match = fc_host_match; | |
1120 | i->t.host_size = sizeof(struct fc_host_attrs); | |
1121 | if (ft->get_fc_host_stats) | |
1122 | i->t.host_attrs.statistics = &fc_statistics_group; | |
1123 | transport_container_register(&i->t.host_attrs); | |
1124 | ||
1125 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
1126 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
1127 | i->rport_attr_cont.ac.match = fc_rport_match; | |
1128 | transport_container_register(&i->rport_attr_cont); | |
1129 | ||
1130 | i->f = ft; | |
1131 | ||
1132 | /* Transport uses the shost workq for scsi scanning */ | |
1133 | i->t.create_work_queue = 1; | |
5c44cd2a JSEC |
1134 | |
1135 | i->t.target_parent = fc_target_parent; | |
1da177e4 LT |
1136 | |
1137 | /* | |
1138 | * Setup SCSI Target Attributes. | |
1139 | */ | |
1140 | count = 0; | |
1141 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
1142 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
1143 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
1144 | ||
1145 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
1146 | ||
1147 | i->starget_attrs[count] = NULL; | |
1148 | ||
1149 | ||
1150 | /* | |
1151 | * Setup SCSI Host Attributes. | |
1152 | */ | |
1153 | count=0; | |
1154 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
1155 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
1156 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); | |
1157 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1158 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); | |
1159 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); | |
1160 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
1161 | SETUP_HOST_ATTRIBUTE_RD(serial_number); | |
1162 | ||
1163 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
1164 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
1165 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
1166 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
1167 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
1168 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
1169 | ||
1170 | /* Transport-managed attributes */ | |
1171 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); | |
91ca7b01 AV |
1172 | if (ft->issue_fc_host_lip) |
1173 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
1da177e4 LT |
1174 | |
1175 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
1176 | ||
1177 | i->host_attrs[count] = NULL; | |
1178 | ||
1179 | /* | |
1180 | * Setup Remote Port Attributes. | |
1181 | */ | |
1182 | count=0; | |
1183 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
1184 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
1185 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
1186 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
1187 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
1188 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
1189 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
1190 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
1191 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
1192 | ||
1193 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
1194 | ||
1195 | i->rport_attrs[count] = NULL; | |
1196 | ||
1197 | return &i->t; | |
1198 | } | |
1199 | EXPORT_SYMBOL(fc_attach_transport); | |
1200 | ||
1201 | void fc_release_transport(struct scsi_transport_template *t) | |
1202 | { | |
1203 | struct fc_internal *i = to_fc_internal(t); | |
1204 | ||
1205 | transport_container_unregister(&i->t.target_attrs); | |
1206 | transport_container_unregister(&i->t.host_attrs); | |
1207 | transport_container_unregister(&i->rport_attr_cont); | |
1208 | ||
1209 | kfree(i); | |
1210 | } | |
1211 | EXPORT_SYMBOL(fc_release_transport); | |
1212 | ||
1213 | ||
1214 | /** | |
1215 | * fc_remove_host - called to terminate any fc_transport-related elements | |
1216 | * for a scsi host. | |
1217 | * @rport: remote port to be unblocked. | |
1218 | * | |
1219 | * This routine is expected to be called immediately preceeding the | |
1220 | * a driver's call to scsi_remove_host(). | |
1221 | * | |
1222 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
1223 | * this routine prior to scsi_remote_host(), will leave dangling | |
1224 | * objects in /sys/class/fc_remote_ports. Access to any of these | |
1225 | * objects can result in a system crash !!! | |
1226 | * | |
1227 | * Notes: | |
1228 | * This routine assumes no locks are held on entry. | |
1229 | **/ | |
1230 | void | |
1231 | fc_remove_host(struct Scsi_Host *shost) | |
1232 | { | |
1233 | struct fc_rport *rport, *next_rport; | |
1234 | ||
1235 | /* Remove any remote ports */ | |
1236 | list_for_each_entry_safe(rport, next_rport, | |
1237 | &fc_host_rports(shost), peers) | |
1238 | fc_rport_terminate(rport); | |
1239 | list_for_each_entry_safe(rport, next_rport, | |
1240 | &fc_host_rport_bindings(shost), peers) | |
1241 | fc_rport_terminate(rport); | |
1242 | } | |
1243 | EXPORT_SYMBOL(fc_remove_host); | |
1244 | ||
19a7b4ae JSEC |
1245 | /* |
1246 | * fc_rport_tgt_remove - Removes the scsi target on the remote port | |
1247 | * @rport: The remote port to be operated on | |
1248 | */ | |
1249 | static void | |
1250 | fc_rport_tgt_remove(struct fc_rport *rport) | |
1251 | { | |
1252 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1253 | ||
1254 | scsi_target_unblock(&rport->dev); | |
1255 | ||
1256 | /* Stop anything on the workq */ | |
1257 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
1258 | flush_scheduled_work(); | |
1259 | scsi_flush_work(shost); | |
1260 | ||
1261 | scsi_remove_target(&rport->dev); | |
1262 | } | |
1263 | ||
1da177e4 LT |
1264 | /** |
1265 | * fc_rport_create - allocates and creates a remote FC port. | |
1266 | * @shost: scsi host the remote port is connected to. | |
1267 | * @channel: Channel on shost port connected to. | |
1268 | * @ids: The world wide names, fc address, and FC4 port | |
1269 | * roles for the remote port. | |
1270 | * | |
1271 | * Allocates and creates the remoter port structure, including the | |
1272 | * class and sysfs creation. | |
1273 | * | |
1274 | * Notes: | |
1275 | * This routine assumes no locks are held on entry. | |
1276 | **/ | |
1277 | struct fc_rport * | |
1278 | fc_rport_create(struct Scsi_Host *shost, int channel, | |
1279 | struct fc_rport_identifiers *ids) | |
1280 | { | |
1281 | struct fc_host_attrs *fc_host = | |
1282 | (struct fc_host_attrs *)shost->shost_data; | |
1283 | struct fc_internal *fci = to_fc_internal(shost->transportt); | |
1284 | struct fc_rport *rport; | |
1285 | struct device *dev; | |
1286 | unsigned long flags; | |
1287 | int error; | |
1288 | size_t size; | |
1289 | ||
1290 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
1291 | rport = kmalloc(size, GFP_KERNEL); | |
1292 | if (unlikely(!rport)) { | |
1293 | printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); | |
1294 | return NULL; | |
1295 | } | |
1296 | memset(rport, 0, size); | |
1297 | ||
1298 | rport->maxframe_size = -1; | |
1299 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1300 | rport->dev_loss_tmo = fc_dev_loss_tmo; | |
1301 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); | |
1302 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
1303 | rport->port_id = ids->port_id; | |
1304 | rport->roles = ids->roles; | |
1305 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1306 | if (fci->f->dd_fcrport_size) | |
1307 | rport->dd_data = &rport[1]; | |
1308 | rport->channel = channel; | |
1309 | ||
19a7b4ae | 1310 | INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport); |
1da177e4 LT |
1311 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport); |
1312 | ||
1313 | spin_lock_irqsave(shost->host_lock, flags); | |
1314 | ||
1315 | rport->number = fc_host->next_rport_number++; | |
1316 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1317 | rport->scsi_target_id = fc_host->next_target_id++; | |
1318 | else | |
1319 | rport->scsi_target_id = -1; | |
1320 | list_add_tail(&rport->peers, &fc_host_rports(shost)); | |
1321 | get_device(&shost->shost_gendev); | |
1322 | ||
1323 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1324 | ||
1325 | dev = &rport->dev; | |
1326 | device_initialize(dev); | |
1327 | dev->parent = get_device(&shost->shost_gendev); | |
1328 | dev->release = fc_rport_dev_release; | |
1329 | sprintf(dev->bus_id, "rport-%d:%d-%d", | |
1330 | shost->host_no, channel, rport->number); | |
1331 | transport_setup_device(dev); | |
1332 | ||
1333 | error = device_add(dev); | |
1334 | if (error) { | |
1335 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
1336 | goto delete_rport; | |
1337 | } | |
1338 | transport_add_device(dev); | |
1339 | transport_configure_device(dev); | |
1340 | ||
1341 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1342 | /* initiate a scan of the target */ | |
1343 | scsi_queue_work(shost, &rport->scan_work); | |
1344 | ||
1345 | return rport; | |
1346 | ||
1347 | delete_rport: | |
1348 | transport_destroy_device(dev); | |
1349 | put_device(dev->parent); | |
1350 | spin_lock_irqsave(shost->host_lock, flags); | |
1351 | list_del(&rport->peers); | |
1352 | put_device(&shost->shost_gendev); | |
1353 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1354 | put_device(dev->parent); | |
1355 | kfree(rport); | |
1356 | return NULL; | |
1357 | } | |
1358 | ||
1359 | /** | |
1360 | * fc_remote_port_add - notifies the fc transport of the existence | |
1361 | * of a remote FC port. | |
1362 | * @shost: scsi host the remote port is connected to. | |
1363 | * @channel: Channel on shost port connected to. | |
1364 | * @ids: The world wide names, fc address, and FC4 port | |
1365 | * roles for the remote port. | |
1366 | * | |
1367 | * The LLDD calls this routine to notify the transport of the existence | |
1368 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
1369 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
1370 | * active for the port. | |
1371 | * | |
1372 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
1373 | * maintains consistent target id bindings on behalf of the LLDD. | |
1374 | * A consistent target id binding is an assignment of a target id to | |
1375 | * a remote port identifier, which persists while the scsi host is | |
1376 | * attached. The remote port can disappear, then later reappear, and | |
1377 | * it's target id assignment remains the same. This allows for shifts | |
1378 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
1379 | * changes to the scsi subsystem which is based on scsi host number and | |
1380 | * target id values. Bindings are only valid during the attachment of | |
1381 | * the scsi host. If the host detaches, then later re-attaches, target | |
1382 | * id bindings may change. | |
1383 | * | |
1384 | * This routine is responsible for returning a remote port structure. | |
1385 | * The routine will search the list of remote ports it maintains | |
1386 | * internally on behalf of consistent target id mappings. If found, the | |
1387 | * remote port structure will be reused. Otherwise, a new remote port | |
1388 | * structure will be allocated. | |
1389 | * | |
1390 | * Whenever a remote port is allocated, a new fc_remote_port class | |
1391 | * device is created. | |
1392 | * | |
1393 | * Should not be called from interrupt context. | |
1394 | * | |
1395 | * Notes: | |
1396 | * This routine assumes no locks are held on entry. | |
1397 | **/ | |
1398 | struct fc_rport * | |
1399 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
1400 | struct fc_rport_identifiers *ids) | |
1401 | { | |
19a7b4ae | 1402 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
1da177e4 LT |
1403 | struct fc_rport *rport; |
1404 | unsigned long flags; | |
1405 | int match = 0; | |
1406 | ||
19a7b4ae JSEC |
1407 | /* |
1408 | * Search the list of "active" rports, for an rport that has been | |
1409 | * deleted, but we've held off the real delete while the target | |
1410 | * is in a "blocked" state. | |
1411 | */ | |
1412 | spin_lock_irqsave(shost->host_lock, flags); | |
1413 | ||
1414 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { | |
1415 | ||
1416 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
1417 | (rport->channel == channel)) { | |
1418 | ||
1419 | switch (fc_host_tgtid_bind_type(shost)) { | |
1420 | case FC_TGTID_BIND_BY_WWPN: | |
1421 | case FC_TGTID_BIND_NONE: | |
1422 | if (rport->port_name == ids->port_name) | |
1423 | match = 1; | |
1424 | break; | |
1425 | case FC_TGTID_BIND_BY_WWNN: | |
1426 | if (rport->node_name == ids->node_name) | |
1427 | match = 1; | |
1428 | break; | |
1429 | case FC_TGTID_BIND_BY_ID: | |
1430 | if (rport->port_id == ids->port_id) | |
1431 | match = 1; | |
1432 | break; | |
1433 | } | |
1434 | ||
1435 | if (match) { | |
1436 | struct work_struct *work = | |
1437 | &rport->dev_loss_work; | |
1438 | ||
1439 | memcpy(&rport->node_name, &ids->node_name, | |
1440 | sizeof(rport->node_name)); | |
1441 | memcpy(&rport->port_name, &ids->port_name, | |
1442 | sizeof(rport->port_name)); | |
1443 | rport->port_id = ids->port_id; | |
1444 | ||
1445 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1446 | rport->roles = ids->roles; | |
1447 | ||
1448 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1449 | ||
1450 | if (fci->f->dd_fcrport_size) | |
1451 | memset(rport->dd_data, 0, | |
1452 | fci->f->dd_fcrport_size); | |
1453 | ||
1454 | /* | |
1455 | * If we were blocked, we were a target. | |
1456 | * If no longer a target, we leave the timer | |
1457 | * running in case the port changes roles | |
1458 | * prior to the timer expiring. If the timer | |
1459 | * fires, the target will be torn down. | |
1460 | */ | |
1461 | if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET)) | |
1462 | return rport; | |
1463 | ||
1464 | /* restart the target */ | |
1465 | ||
1466 | /* | |
1467 | * Stop the target timer first. Take no action | |
1468 | * on the del_timer failure as the state | |
1469 | * machine state change will validate the | |
1470 | * transaction. | |
1471 | */ | |
1472 | if (!cancel_delayed_work(work)) | |
1473 | flush_scheduled_work(); | |
1474 | ||
1475 | /* initiate a scan of the target */ | |
1476 | scsi_queue_work(shost, &rport->scan_work); | |
1477 | ||
1478 | return rport; | |
1479 | } | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | /* Search the bindings array */ | |
1da177e4 LT |
1484 | if (likely((ids->roles & FC_RPORT_ROLE_FCP_TARGET) && |
1485 | (fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE))) { | |
1486 | ||
1487 | /* search for a matching consistent binding */ | |
1488 | ||
1da177e4 LT |
1489 | list_for_each_entry(rport, &fc_host_rport_bindings(shost), |
1490 | peers) { | |
1491 | if (rport->channel != channel) | |
1492 | continue; | |
1493 | ||
1494 | switch (fc_host_tgtid_bind_type(shost)) { | |
1495 | case FC_TGTID_BIND_BY_WWPN: | |
1496 | if (rport->port_name == ids->port_name) | |
1497 | match = 1; | |
1498 | break; | |
1499 | case FC_TGTID_BIND_BY_WWNN: | |
1500 | if (rport->node_name == ids->node_name) | |
1501 | match = 1; | |
1502 | break; | |
1503 | case FC_TGTID_BIND_BY_ID: | |
1504 | if (rport->port_id == ids->port_id) | |
1505 | match = 1; | |
1506 | break; | |
1507 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
1508 | break; | |
1509 | } | |
1510 | ||
1511 | if (match) { | |
1512 | list_move_tail(&rport->peers, | |
1513 | &fc_host_rports(shost)); | |
1514 | break; | |
1515 | } | |
1516 | } | |
1517 | ||
1da177e4 LT |
1518 | if (match) { |
1519 | memcpy(&rport->node_name, &ids->node_name, | |
1520 | sizeof(rport->node_name)); | |
1521 | memcpy(&rport->port_name, &ids->port_name, | |
1522 | sizeof(rport->port_name)); | |
1523 | rport->port_id = ids->port_id; | |
1524 | rport->roles = ids->roles; | |
1525 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1526 | ||
19a7b4ae JSEC |
1527 | spin_unlock_irqrestore(shost->host_lock, flags); |
1528 | ||
1529 | if (fci->f->dd_fcrport_size) | |
1530 | memset(rport->dd_data, 0, | |
1531 | fci->f->dd_fcrport_size); | |
1532 | ||
1da177e4 LT |
1533 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) |
1534 | /* initiate a scan of the target */ | |
1535 | scsi_queue_work(shost, &rport->scan_work); | |
1536 | ||
1537 | return rport; | |
1538 | } | |
1539 | } | |
1540 | ||
19a7b4ae JSEC |
1541 | spin_unlock_irqrestore(shost->host_lock, flags); |
1542 | ||
1da177e4 LT |
1543 | /* No consistent binding found - create new remote port entry */ |
1544 | rport = fc_rport_create(shost, channel, ids); | |
1545 | ||
1546 | return rport; | |
1547 | } | |
1548 | EXPORT_SYMBOL(fc_remote_port_add); | |
1549 | ||
1da177e4 LT |
1550 | /* |
1551 | * fc_rport_terminate - this routine tears down and deallocates a remote port. | |
1552 | * @rport: The remote port to be terminated | |
1553 | * | |
1554 | * Notes: | |
1555 | * This routine assumes no locks are held on entry. | |
1556 | */ | |
1557 | static void | |
1558 | fc_rport_terminate(struct fc_rport *rport) | |
1559 | { | |
1560 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1561 | struct device *dev = &rport->dev; | |
1562 | unsigned long flags; | |
1563 | ||
1564 | fc_rport_tgt_remove(rport); | |
1565 | ||
1566 | transport_remove_device(dev); | |
1567 | device_del(dev); | |
1568 | transport_destroy_device(dev); | |
1569 | spin_lock_irqsave(shost->host_lock, flags); | |
1570 | list_del(&rport->peers); | |
1571 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1572 | put_device(&shost->shost_gendev); | |
1573 | } | |
1574 | ||
1575 | /** | |
1576 | * fc_remote_port_delete - notifies the fc transport that a remote | |
1577 | * port is no longer in existence. | |
1578 | * @rport: The remote port that no longer exists | |
1579 | * | |
1580 | * The LLDD calls this routine to notify the transport that a remote | |
1581 | * port is no longer part of the topology. Note: Although a port | |
1582 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae JSEC |
1583 | * ports displayed by the fc_host. We do this under 2 conditions: |
1584 | * - If the port was a scsi target, we delay its deletion by "blocking" it. | |
1585 | * This allows the port to temporarily disappear, then reappear without | |
1586 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
1587 | * period the port will still exist. | |
1588 | * - If the port was a scsi target and disappears for longer than we | |
1589 | * expect, we'll delete the port and the tear down the SCSI device tree | |
1590 | * attached to it. However, we want to semi-persist the target id assigned | |
1591 | * to that port if it eventually does exist. The port structure will | |
1592 | * remain (although with minimal information) so that the target id | |
1593 | * bindings remails. | |
1da177e4 LT |
1594 | * |
1595 | * If the remote port is not an FCP Target, it will be fully torn down | |
1596 | * and deallocated, including the fc_remote_port class device. | |
1597 | * | |
19a7b4ae JSEC |
1598 | * If the remote port is an FCP Target, the port will be placed in a |
1599 | * temporary blocked state. From the LLDD's perspective, the rport no | |
1600 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
1601 | * exists, but all sdevs on it are blocked from further I/O. The following | |
1602 | * is then expected: | |
1603 | * If the remote port does not return (signaled by a LLDD call to | |
1604 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
1605 | * scsi target is removed - killing all outstanding i/o and removing the | |
1606 | * scsi devices attached ot it. The port structure will be marked Not | |
1607 | * Present and be partially cleared, leaving only enough information to | |
1608 | * recognize the remote port relative to the scsi target id binding if | |
1609 | * it later appears. The port will remain as long as there is a valid | |
1610 | * binding (e.g. until the user changes the binding type or unloads the | |
1611 | * scsi host with the binding). | |
1da177e4 | 1612 | * |
19a7b4ae JSEC |
1613 | * If the remote port returns within the dev_loss_tmo value (and matches |
1614 | * according to the target id binding type), the port structure will be | |
1615 | * reused. If it is no longer a SCSI target, the target will be torn | |
1616 | * down. If it continues to be a SCSI target, then the target will be | |
1617 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
1618 | * to ensure that all luns are detected. | |
1619 | * | |
1620 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
1621 | * |
1622 | * Notes: | |
1623 | * This routine assumes no locks are held on entry. | |
1624 | **/ | |
1625 | void | |
1626 | fc_remote_port_delete(struct fc_rport *rport) | |
1627 | { | |
19a7b4ae | 1628 | int timeout = rport->dev_loss_tmo; |
1da177e4 | 1629 | |
19a7b4ae JSEC |
1630 | /* If no scsi target id mapping, delete it */ |
1631 | if (rport->scsi_target_id == -1) { | |
1da177e4 LT |
1632 | fc_rport_terminate(rport); |
1633 | return; | |
1634 | } | |
1635 | ||
19a7b4ae | 1636 | scsi_target_block(&rport->dev); |
1da177e4 | 1637 | |
19a7b4ae JSEC |
1638 | /* cap the length the devices can be blocked until they are deleted */ |
1639 | schedule_delayed_work(&rport->dev_loss_work, timeout * HZ); | |
1da177e4 | 1640 | |
19a7b4ae | 1641 | rport->port_state = FC_PORTSTATE_BLOCKED; |
1da177e4 LT |
1642 | } |
1643 | EXPORT_SYMBOL(fc_remote_port_delete); | |
1644 | ||
1645 | /** | |
1646 | * fc_remote_port_rolechg - notifies the fc transport that the roles | |
1647 | * on a remote may have changed. | |
1648 | * @rport: The remote port that changed. | |
1649 | * | |
1650 | * The LLDD calls this routine to notify the transport that the roles | |
1651 | * on a remote port may have changed. The largest effect of this is | |
1652 | * if a port now becomes a FCP Target, it must be allocated a | |
1653 | * scsi target id. If the port is no longer a FCP target, any | |
1654 | * scsi target id value assigned to it will persist in case the | |
1655 | * role changes back to include FCP Target. No changes in the scsi | |
1656 | * midlayer will be invoked if the role changes (in the expectation | |
1657 | * that the role will be resumed. If it doesn't normal error processing | |
1658 | * will take place). | |
1659 | * | |
1660 | * Should not be called from interrupt context. | |
1661 | * | |
1662 | * Notes: | |
1663 | * This routine assumes no locks are held on entry. | |
1664 | **/ | |
1665 | void | |
1666 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
1667 | { | |
1668 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1669 | struct fc_host_attrs *fc_host = | |
1670 | (struct fc_host_attrs *)shost->shost_data; | |
1671 | unsigned long flags; | |
1672 | int create = 0; | |
1673 | ||
1da177e4 | 1674 | spin_lock_irqsave(shost->host_lock, flags); |
19a7b4ae JSEC |
1675 | if (roles & FC_RPORT_ROLE_FCP_TARGET) { |
1676 | if (rport->scsi_target_id == -1) { | |
1677 | rport->scsi_target_id = fc_host->next_target_id++; | |
1678 | create = 1; | |
1679 | } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) | |
1680 | create = 1; | |
1da177e4 LT |
1681 | } |
1682 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1683 | ||
19a7b4ae JSEC |
1684 | rport->roles = roles; |
1685 | ||
1686 | if (create) { | |
1687 | /* | |
1688 | * There may have been a delete timer running on the | |
1689 | * port. Ensure that it is cancelled as we now know | |
1690 | * the port is an FCP Target. | |
1691 | * Note: we know the rport is exists and in an online | |
1692 | * state as the LLDD would not have had an rport | |
1693 | * reference to pass us. | |
1694 | * | |
1695 | * Take no action on the del_timer failure as the state | |
1696 | * machine state change will validate the | |
1697 | * transaction. | |
1698 | */ | |
1699 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
1700 | flush_scheduled_work(); | |
1701 | ||
1da177e4 LT |
1702 | /* initiate a scan of the target */ |
1703 | scsi_queue_work(shost, &rport->scan_work); | |
19a7b4ae | 1704 | } |
1da177e4 LT |
1705 | } |
1706 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
1707 | ||
1708 | /** | |
19a7b4ae JSEC |
1709 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that |
1710 | * was a SCSI target (thus was blocked), and failed | |
1711 | * to return in the alloted time. | |
1712 | * | |
1713 | * @data: rport target that failed to reappear in the alloted time. | |
1da177e4 LT |
1714 | **/ |
1715 | static void | |
19a7b4ae | 1716 | fc_timeout_deleted_rport(void *data) |
1da177e4 LT |
1717 | { |
1718 | struct fc_rport *rport = (struct fc_rport *)data; | |
19a7b4ae JSEC |
1719 | struct Scsi_Host *shost = rport_to_shost(rport); |
1720 | unsigned long flags; | |
1da177e4 | 1721 | |
19a7b4ae | 1722 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 LT |
1723 | |
1724 | /* | |
19a7b4ae JSEC |
1725 | * If the port is ONLINE, then it came back, but was no longer an |
1726 | * FCP target. Thus we need to tear down the scsi_target on it. | |
1da177e4 | 1727 | */ |
19a7b4ae JSEC |
1728 | if (rport->port_state == FC_PORTSTATE_ONLINE) { |
1729 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 | 1730 | |
19a7b4ae JSEC |
1731 | dev_printk(KERN_ERR, &rport->dev, |
1732 | "blocked FC remote port time out: removing target\n"); | |
1da177e4 | 1733 | |
19a7b4ae | 1734 | fc_rport_tgt_remove(rport); |
1da177e4 | 1735 | |
19a7b4ae JSEC |
1736 | return; |
1737 | } | |
1da177e4 | 1738 | |
19a7b4ae JSEC |
1739 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
1740 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1741 | dev_printk(KERN_ERR, &rport->dev, | |
1742 | "blocked FC remote port time out: leaving target alone\n"); | |
1743 | return; | |
1744 | } | |
1da177e4 | 1745 | |
19a7b4ae JSEC |
1746 | if (fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE) { |
1747 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1748 | dev_printk(KERN_ERR, &rport->dev, | |
1749 | "blocked FC remote port time out: removing target\n"); | |
1750 | fc_rport_terminate(rport); | |
1751 | return; | |
1752 | } | |
1da177e4 | 1753 | |
19a7b4ae JSEC |
1754 | dev_printk(KERN_ERR, &rport->dev, |
1755 | "blocked FC remote port time out: removing target and " | |
1756 | "saving binding\n"); | |
1757 | ||
1758 | list_move_tail(&rport->peers, &fc_host_rport_bindings(shost)); | |
1da177e4 LT |
1759 | |
1760 | /* | |
19a7b4ae JSEC |
1761 | * Note: We do not remove or clear the hostdata area. This allows |
1762 | * host-specific target data to persist along with the | |
1763 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 1764 | */ |
1da177e4 | 1765 | |
19a7b4ae JSEC |
1766 | /* |
1767 | * Reinitialize port attributes that may change if the port comes back. | |
1768 | */ | |
1769 | rport->maxframe_size = -1; | |
1770 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1771 | rport->roles = FC_RPORT_ROLE_UNKNOWN; | |
1772 | rport->port_state = FC_PORTSTATE_NOTPRESENT; | |
1da177e4 | 1773 | |
19a7b4ae JSEC |
1774 | /* remove the identifiers that aren't used in the consisting binding */ |
1775 | switch (fc_host_tgtid_bind_type(shost)) { | |
1776 | case FC_TGTID_BIND_BY_WWPN: | |
1777 | rport->node_name = -1; | |
1778 | rport->port_id = -1; | |
1779 | break; | |
1780 | case FC_TGTID_BIND_BY_WWNN: | |
1781 | rport->port_name = -1; | |
1782 | rport->port_id = -1; | |
1783 | break; | |
1784 | case FC_TGTID_BIND_BY_ID: | |
1785 | rport->node_name = -1; | |
1786 | rport->port_name = -1; | |
1787 | break; | |
1788 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
1789 | break; | |
1790 | } | |
1791 | ||
1792 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1793 | ||
1794 | /* | |
1795 | * As this only occurs if the remote port (scsi target) | |
1796 | * went away and didn't come back - we'll remove | |
1797 | * all attached scsi devices. | |
1798 | */ | |
1799 | fc_rport_tgt_remove(rport); | |
1da177e4 | 1800 | } |
1da177e4 LT |
1801 | |
1802 | /** | |
1803 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
19a7b4ae JSEC |
1804 | * |
1805 | * Will unblock the target (in case it went away and has now come back), | |
1806 | * then invoke a scan. | |
1807 | * | |
1da177e4 LT |
1808 | * @data: remote port to be scanned. |
1809 | **/ | |
1810 | static void | |
1811 | fc_scsi_scan_rport(void *data) | |
1812 | { | |
1813 | struct fc_rport *rport = (struct fc_rport *)data; | |
1814 | ||
19a7b4ae | 1815 | scsi_target_unblock(&rport->dev); |
1da177e4 LT |
1816 | scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id, |
1817 | SCAN_WILD_CARD, 1); | |
1818 | } | |
1819 | ||
1820 | ||
1821 | MODULE_AUTHOR("Martin Hicks"); | |
1822 | MODULE_DESCRIPTION("FC Transport Attributes"); | |
1823 | MODULE_LICENSE("GPL"); | |
1824 | ||
1825 | module_init(fc_transport_init); | |
1826 | module_exit(fc_transport_exit); |