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1da177e4 LT |
1 | /* |
2 | * FiberChannel transport specific attributes exported to sysfs. | |
3 | * | |
4 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | * ======== | |
21 | * | |
22 | * Copyright (C) 2004-2005 James Smart, Emulex Corporation | |
23 | * Rewrite for host, target, device, and remote port attributes, | |
24 | * statistics, and service functions... | |
25 | * | |
26 | */ | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
4e57b681 | 29 | #include <linux/sched.h> /* workqueue stuff, HZ */ |
1da177e4 LT |
30 | #include <scsi/scsi_device.h> |
31 | #include <scsi/scsi_host.h> | |
32 | #include <scsi/scsi_transport.h> | |
33 | #include <scsi/scsi_transport_fc.h> | |
c829c394 | 34 | #include <scsi/scsi_cmnd.h> |
84314fd4 JS |
35 | #include <linux/netlink.h> |
36 | #include <net/netlink.h> | |
37 | #include <scsi/scsi_netlink_fc.h> | |
1da177e4 LT |
38 | #include "scsi_priv.h" |
39 | ||
aedf3497 JS |
40 | static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
41 | ||
1da177e4 LT |
42 | /* |
43 | * Redefine so that we can have same named attributes in the | |
44 | * sdev/starget/host objects. | |
45 | */ | |
46 | #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
47 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
48 | __ATTR(_name,_mode,_show,_store) | |
49 | ||
50 | #define fc_enum_name_search(title, table_type, table) \ | |
51 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
52 | { \ | |
53 | int i; \ | |
54 | char *name = NULL; \ | |
55 | \ | |
6391a113 | 56 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
57 | if (table[i].value == table_key) { \ |
58 | name = table[i].name; \ | |
59 | break; \ | |
60 | } \ | |
61 | } \ | |
62 | return name; \ | |
63 | } | |
64 | ||
65 | #define fc_enum_name_match(title, table_type, table) \ | |
66 | static int get_fc_##title##_match(const char *table_key, \ | |
67 | enum table_type *value) \ | |
68 | { \ | |
69 | int i; \ | |
70 | \ | |
6391a113 | 71 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
72 | if (strncmp(table_key, table[i].name, \ |
73 | table[i].matchlen) == 0) { \ | |
74 | *value = table[i].value; \ | |
75 | return 0; /* success */ \ | |
76 | } \ | |
77 | } \ | |
78 | return 1; /* failure */ \ | |
79 | } | |
80 | ||
81 | ||
82 | /* Convert fc_port_type values to ascii string name */ | |
83 | static struct { | |
84 | enum fc_port_type value; | |
85 | char *name; | |
86 | } fc_port_type_names[] = { | |
87 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
88 | { FC_PORTTYPE_OTHER, "Other" }, | |
89 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
90 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
91 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
92 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
93 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" }, | |
94 | }; | |
95 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
96 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
97 | ||
98 | ||
84314fd4 JS |
99 | /* Convert fc_host_event_code values to ascii string name */ |
100 | static const struct { | |
101 | enum fc_host_event_code value; | |
102 | char *name; | |
103 | } fc_host_event_code_names[] = { | |
104 | { FCH_EVT_LIP, "lip" }, | |
105 | { FCH_EVT_LINKUP, "link_up" }, | |
106 | { FCH_EVT_LINKDOWN, "link_down" }, | |
107 | { FCH_EVT_LIPRESET, "lip_reset" }, | |
108 | { FCH_EVT_RSCN, "rscn" }, | |
109 | { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, | |
110 | { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, | |
111 | { FCH_EVT_PORT_ONLINE, "port_online" }, | |
112 | { FCH_EVT_PORT_OFFLINE, "port_offline" }, | |
113 | { FCH_EVT_PORT_FABRIC, "port_fabric" }, | |
114 | { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, | |
115 | { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, | |
116 | }; | |
117 | fc_enum_name_search(host_event_code, fc_host_event_code, | |
118 | fc_host_event_code_names) | |
119 | #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 | |
120 | ||
121 | ||
1da177e4 LT |
122 | /* Convert fc_port_state values to ascii string name */ |
123 | static struct { | |
124 | enum fc_port_state value; | |
125 | char *name; | |
126 | } fc_port_state_names[] = { | |
127 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
128 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
129 | { FC_PORTSTATE_ONLINE, "Online" }, | |
130 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
131 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
132 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
133 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
134 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
135 | { FC_PORTSTATE_ERROR, "Error" }, | |
136 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
42e33148 | 137 | { FC_PORTSTATE_DELETED, "Deleted" }, |
1da177e4 LT |
138 | }; |
139 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
140 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
141 | ||
142 | ||
143 | /* Convert fc_tgtid_binding_type values to ascii string name */ | |
0ad78200 | 144 | static const struct { |
1da177e4 LT |
145 | enum fc_tgtid_binding_type value; |
146 | char *name; | |
147 | int matchlen; | |
148 | } fc_tgtid_binding_type_names[] = { | |
149 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
150 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
151 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
152 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
153 | }; | |
154 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
155 | fc_tgtid_binding_type_names) | |
156 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
157 | fc_tgtid_binding_type_names) | |
158 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
159 | ||
160 | ||
161 | #define fc_bitfield_name_search(title, table) \ | |
162 | static ssize_t \ | |
163 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
164 | { \ | |
165 | char *prefix = ""; \ | |
166 | ssize_t len = 0; \ | |
167 | int i; \ | |
168 | \ | |
6391a113 | 169 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
170 | if (table[i].value & table_key) { \ |
171 | len += sprintf(buf + len, "%s%s", \ | |
172 | prefix, table[i].name); \ | |
173 | prefix = ", "; \ | |
174 | } \ | |
175 | } \ | |
176 | len += sprintf(buf + len, "\n"); \ | |
177 | return len; \ | |
178 | } | |
179 | ||
180 | ||
181 | /* Convert FC_COS bit values to ascii string name */ | |
0ad78200 | 182 | static const struct { |
1da177e4 LT |
183 | u32 value; |
184 | char *name; | |
185 | } fc_cos_names[] = { | |
186 | { FC_COS_CLASS1, "Class 1" }, | |
187 | { FC_COS_CLASS2, "Class 2" }, | |
188 | { FC_COS_CLASS3, "Class 3" }, | |
189 | { FC_COS_CLASS4, "Class 4" }, | |
190 | { FC_COS_CLASS6, "Class 6" }, | |
191 | }; | |
192 | fc_bitfield_name_search(cos, fc_cos_names) | |
193 | ||
194 | ||
195 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
0ad78200 | 196 | static const struct { |
1da177e4 LT |
197 | u32 value; |
198 | char *name; | |
199 | } fc_port_speed_names[] = { | |
200 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
201 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
202 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
203 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
204 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, | |
205 | }; | |
206 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
207 | ||
208 | ||
209 | static int | |
210 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
211 | { | |
212 | int i, len=0; | |
213 | ||
214 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
215 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
216 | len += sprintf(buf + len, "\n"); | |
217 | return len; | |
218 | } | |
219 | ||
220 | ||
221 | /* Convert FC_RPORT_ROLE bit values to ascii string name */ | |
0ad78200 | 222 | static const struct { |
1da177e4 LT |
223 | u32 value; |
224 | char *name; | |
225 | } fc_remote_port_role_names[] = { | |
226 | { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" }, | |
227 | { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
228 | { FC_RPORT_ROLE_IP_PORT, "IP Port" }, | |
229 | }; | |
230 | fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names) | |
231 | ||
232 | /* | |
233 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
234 | */ | |
235 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
236 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
237 | #define FC_FPORT_PORTID 0x00000e | |
238 | #define FC_FABCTLR_PORTID 0x00000d | |
239 | #define FC_DIRSRVR_PORTID 0x00000c | |
240 | #define FC_TIMESRVR_PORTID 0x00000b | |
241 | #define FC_MGMTSRVR_PORTID 0x00000a | |
242 | ||
243 | ||
19a7b4ae | 244 | static void fc_timeout_deleted_rport(void *data); |
1da177e4 | 245 | static void fc_scsi_scan_rport(void *data); |
1da177e4 LT |
246 | |
247 | /* | |
248 | * Attribute counts pre object type... | |
249 | * Increase these values if you add attributes | |
250 | */ | |
251 | #define FC_STARGET_NUM_ATTRS 3 | |
252 | #define FC_RPORT_NUM_ATTRS 9 | |
ad139a2f | 253 | #define FC_HOST_NUM_ATTRS 17 |
1da177e4 LT |
254 | |
255 | struct fc_internal { | |
256 | struct scsi_transport_template t; | |
257 | struct fc_function_template *f; | |
258 | ||
259 | /* | |
260 | * For attributes : each object has : | |
261 | * An array of the actual attributes structures | |
262 | * An array of null-terminated pointers to the attribute | |
263 | * structures - used for mid-layer interaction. | |
264 | * | |
265 | * The attribute containers for the starget and host are are | |
266 | * part of the midlayer. As the remote port is specific to the | |
267 | * fc transport, we must provide the attribute container. | |
268 | */ | |
269 | struct class_device_attribute private_starget_attrs[ | |
270 | FC_STARGET_NUM_ATTRS]; | |
271 | struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; | |
272 | ||
273 | struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; | |
274 | struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
275 | ||
276 | struct transport_container rport_attr_cont; | |
277 | struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; | |
278 | struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
279 | }; | |
280 | ||
281 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
282 | ||
d0a7e574 JB |
283 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
284 | struct class_device *cdev) | |
1da177e4 LT |
285 | { |
286 | struct scsi_target *starget = to_scsi_target(dev); | |
287 | struct fc_rport *rport = starget_to_rport(starget); | |
288 | ||
289 | /* | |
290 | * if parent is remote port, use values from remote port. | |
291 | * Otherwise, this host uses the fc_transport, but not the | |
292 | * remote port interface. As such, initialize to known non-values. | |
293 | */ | |
294 | if (rport) { | |
295 | fc_starget_node_name(starget) = rport->node_name; | |
296 | fc_starget_port_name(starget) = rport->port_name; | |
297 | fc_starget_port_id(starget) = rport->port_id; | |
298 | } else { | |
299 | fc_starget_node_name(starget) = -1; | |
300 | fc_starget_port_name(starget) = -1; | |
301 | fc_starget_port_id(starget) = -1; | |
302 | } | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
308 | "fc_transport", | |
309 | fc_target_setup, | |
310 | NULL, | |
311 | NULL); | |
312 | ||
d0a7e574 JB |
313 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
314 | struct class_device *cdev) | |
1da177e4 LT |
315 | { |
316 | struct Scsi_Host *shost = dev_to_shost(dev); | |
aedf3497 | 317 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
318 | |
319 | /* | |
320 | * Set default values easily detected by the midlayer as | |
321 | * failure cases. The scsi lldd is responsible for initializing | |
322 | * all transport attributes to valid values per host. | |
323 | */ | |
aedf3497 JS |
324 | fc_host->node_name = -1; |
325 | fc_host->port_name = -1; | |
326 | fc_host->permanent_port_name = -1; | |
327 | fc_host->supported_classes = FC_COS_UNSPECIFIED; | |
328 | memset(fc_host->supported_fc4s, 0, | |
329 | sizeof(fc_host->supported_fc4s)); | |
aedf3497 JS |
330 | fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; |
331 | fc_host->maxframe_size = -1; | |
332 | memset(fc_host->serial_number, 0, | |
333 | sizeof(fc_host->serial_number)); | |
334 | ||
335 | fc_host->port_id = -1; | |
336 | fc_host->port_type = FC_PORTTYPE_UNKNOWN; | |
337 | fc_host->port_state = FC_PORTSTATE_UNKNOWN; | |
338 | memset(fc_host->active_fc4s, 0, | |
339 | sizeof(fc_host->active_fc4s)); | |
340 | fc_host->speed = FC_PORTSPEED_UNKNOWN; | |
341 | fc_host->fabric_name = -1; | |
b8d08210 JS |
342 | memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); |
343 | memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); | |
aedf3497 JS |
344 | |
345 | fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; | |
346 | ||
347 | INIT_LIST_HEAD(&fc_host->rports); | |
348 | INIT_LIST_HEAD(&fc_host->rport_bindings); | |
349 | fc_host->next_rport_number = 0; | |
350 | fc_host->next_target_id = 0; | |
351 | ||
352 | snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d", | |
353 | shost->host_no); | |
354 | fc_host->work_q = create_singlethread_workqueue( | |
355 | fc_host->work_q_name); | |
356 | if (!fc_host->work_q) | |
357 | return -ENOMEM; | |
358 | ||
359 | snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d", | |
360 | shost->host_no); | |
361 | fc_host->devloss_work_q = create_singlethread_workqueue( | |
362 | fc_host->devloss_work_q_name); | |
363 | if (!fc_host->devloss_work_q) { | |
364 | destroy_workqueue(fc_host->work_q); | |
365 | fc_host->work_q = NULL; | |
366 | return -ENOMEM; | |
367 | } | |
368 | ||
1da177e4 LT |
369 | return 0; |
370 | } | |
371 | ||
372 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
373 | "fc_host", | |
374 | fc_host_setup, | |
375 | NULL, | |
376 | NULL); | |
377 | ||
378 | /* | |
379 | * Setup and Remove actions for remote ports are handled | |
380 | * in the service functions below. | |
381 | */ | |
382 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
383 | "fc_remote_ports", | |
384 | NULL, | |
385 | NULL, | |
386 | NULL); | |
387 | ||
388 | /* | |
389 | * Module Parameters | |
390 | */ | |
391 | ||
392 | /* | |
393 | * dev_loss_tmo: the default number of seconds that the FC transport | |
394 | * should insulate the loss of a remote port. | |
395 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
396 | */ | |
1c9e16e4 | 397 | static unsigned int fc_dev_loss_tmo = 60; /* seconds */ |
1da177e4 LT |
398 | |
399 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR); | |
400 | MODULE_PARM_DESC(dev_loss_tmo, | |
401 | "Maximum number of seconds that the FC transport should" | |
402 | " insulate the loss of a remote port. Once this value is" | |
403 | " exceeded, the scsi target is removed. Value should be" | |
404 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); | |
405 | ||
84314fd4 JS |
406 | /** |
407 | * Netlink Infrastructure | |
408 | **/ | |
409 | ||
410 | static atomic_t fc_event_seq; | |
411 | ||
412 | /** | |
413 | * fc_get_event_number - Obtain the next sequential FC event number | |
414 | * | |
415 | * Notes: | |
416 | * We could have inline'd this, but it would have required fc_event_seq to | |
417 | * be exposed. For now, live with the subroutine call. | |
418 | * Atomic used to avoid lock/unlock... | |
419 | **/ | |
420 | u32 | |
421 | fc_get_event_number(void) | |
422 | { | |
423 | return atomic_add_return(1, &fc_event_seq); | |
424 | } | |
425 | EXPORT_SYMBOL(fc_get_event_number); | |
426 | ||
427 | ||
428 | /** | |
429 | * fc_host_post_event - called to post an even on an fc_host. | |
430 | * | |
431 | * @shost: host the event occurred on | |
432 | * @event_number: fc event number obtained from get_fc_event_number() | |
433 | * @event_code: fc_host event being posted | |
434 | * @event_data: 32bits of data for the event being posted | |
435 | * | |
436 | * Notes: | |
437 | * This routine assumes no locks are held on entry. | |
438 | **/ | |
439 | void | |
440 | fc_host_post_event(struct Scsi_Host *shost, u32 event_number, | |
441 | enum fc_host_event_code event_code, u32 event_data) | |
442 | { | |
443 | struct sk_buff *skb; | |
444 | struct nlmsghdr *nlh; | |
445 | struct fc_nl_event *event; | |
446 | const char *name; | |
447 | u32 len, skblen; | |
448 | int err; | |
449 | ||
450 | if (!scsi_nl_sock) { | |
451 | err = -ENOENT; | |
452 | goto send_fail; | |
453 | } | |
454 | ||
455 | len = FC_NL_MSGALIGN(sizeof(*event)); | |
456 | skblen = NLMSG_SPACE(len); | |
457 | ||
458 | skb = alloc_skb(skblen, GFP_KERNEL); | |
459 | if (!skb) { | |
460 | err = -ENOBUFS; | |
461 | goto send_fail; | |
462 | } | |
463 | ||
464 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
465 | skblen - sizeof(*nlh), 0); | |
466 | if (!nlh) { | |
467 | err = -ENOBUFS; | |
468 | goto send_fail_skb; | |
469 | } | |
470 | event = NLMSG_DATA(nlh); | |
471 | ||
472 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
473 | FC_NL_ASYNC_EVENT, len); | |
474 | event->seconds = get_seconds(); | |
475 | event->vendor_id = 0; | |
476 | event->host_no = shost->host_no; | |
477 | event->event_datalen = sizeof(u32); /* bytes */ | |
478 | event->event_num = event_number; | |
479 | event->event_code = event_code; | |
480 | event->event_data = event_data; | |
481 | ||
482 | err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS); | |
483 | if (err && (err != -ESRCH)) /* filter no recipient errors */ | |
484 | /* nlmsg_multicast already kfree_skb'd */ | |
485 | goto send_fail; | |
486 | ||
487 | return; | |
488 | ||
489 | send_fail_skb: | |
490 | kfree_skb(skb); | |
491 | send_fail: | |
492 | name = get_fc_host_event_code_name(event_code); | |
493 | printk(KERN_WARNING | |
494 | "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", | |
495 | __FUNCTION__, shost->host_no, | |
496 | (name) ? name : "<unknown>", event_data, err); | |
497 | return; | |
498 | } | |
499 | EXPORT_SYMBOL(fc_host_post_event); | |
500 | ||
501 | ||
502 | /** | |
503 | * fc_host_post_vendor_event - called to post a vendor unique event on | |
504 | * a fc_host | |
505 | * | |
506 | * @shost: host the event occurred on | |
507 | * @event_number: fc event number obtained from get_fc_event_number() | |
508 | * @data_len: amount, in bytes, of vendor unique data | |
509 | * @data_buf: pointer to vendor unique data | |
510 | * | |
511 | * Notes: | |
512 | * This routine assumes no locks are held on entry. | |
513 | **/ | |
514 | void | |
515 | fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, | |
516 | u32 data_len, char * data_buf, u32 vendor_id) | |
517 | { | |
518 | struct sk_buff *skb; | |
519 | struct nlmsghdr *nlh; | |
520 | struct fc_nl_event *event; | |
521 | u32 len, skblen; | |
522 | int err; | |
523 | ||
524 | if (!scsi_nl_sock) { | |
525 | err = -ENOENT; | |
526 | goto send_vendor_fail; | |
527 | } | |
528 | ||
529 | len = FC_NL_MSGALIGN(sizeof(*event) + data_len); | |
530 | skblen = NLMSG_SPACE(len); | |
531 | ||
532 | skb = alloc_skb(skblen, GFP_KERNEL); | |
533 | if (!skb) { | |
534 | err = -ENOBUFS; | |
535 | goto send_vendor_fail; | |
536 | } | |
537 | ||
538 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
539 | skblen - sizeof(*nlh), 0); | |
540 | if (!nlh) { | |
541 | err = -ENOBUFS; | |
542 | goto send_vendor_fail_skb; | |
543 | } | |
544 | event = NLMSG_DATA(nlh); | |
545 | ||
546 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
547 | FC_NL_ASYNC_EVENT, len); | |
548 | event->seconds = get_seconds(); | |
549 | event->vendor_id = vendor_id; | |
550 | event->host_no = shost->host_no; | |
551 | event->event_datalen = data_len; /* bytes */ | |
552 | event->event_num = event_number; | |
553 | event->event_code = FCH_EVT_VENDOR_UNIQUE; | |
554 | memcpy(&event->event_data, data_buf, data_len); | |
555 | ||
556 | err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS); | |
557 | if (err && (err != -ESRCH)) /* filter no recipient errors */ | |
558 | /* nlmsg_multicast already kfree_skb'd */ | |
559 | goto send_vendor_fail; | |
560 | ||
561 | return; | |
562 | ||
563 | send_vendor_fail_skb: | |
564 | kfree_skb(skb); | |
565 | send_vendor_fail: | |
566 | printk(KERN_WARNING | |
567 | "%s: Dropped Event : host %d vendor_unique - err %d\n", | |
568 | __FUNCTION__, shost->host_no, err); | |
569 | return; | |
570 | } | |
571 | EXPORT_SYMBOL(fc_host_post_vendor_event); | |
572 | ||
573 | ||
1da177e4 LT |
574 | |
575 | static __init int fc_transport_init(void) | |
576 | { | |
84314fd4 JS |
577 | int error; |
578 | ||
579 | atomic_set(&fc_event_seq, 0); | |
580 | ||
581 | error = transport_class_register(&fc_host_class); | |
1da177e4 LT |
582 | if (error) |
583 | return error; | |
584 | error = transport_class_register(&fc_rport_class); | |
585 | if (error) | |
586 | return error; | |
587 | return transport_class_register(&fc_transport_class); | |
588 | } | |
589 | ||
590 | static void __exit fc_transport_exit(void) | |
591 | { | |
592 | transport_class_unregister(&fc_transport_class); | |
593 | transport_class_unregister(&fc_rport_class); | |
594 | transport_class_unregister(&fc_host_class); | |
595 | } | |
596 | ||
597 | /* | |
598 | * FC Remote Port Attribute Management | |
599 | */ | |
600 | ||
601 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
602 | static ssize_t \ | |
603 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
604 | { \ | |
605 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
606 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
607 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
608 | if ((i->f->get_rport_##field) && \ |
609 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 610 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 611 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
612 | i->f->get_rport_##field(rport); \ |
613 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
614 | } | |
615 | ||
616 | #define fc_rport_store_function(field) \ | |
617 | static ssize_t \ | |
618 | store_fc_rport_##field(struct class_device *cdev, const char *buf, \ | |
619 | size_t count) \ | |
620 | { \ | |
621 | int val; \ | |
622 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
623 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
624 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae | 625 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
42e33148 | 626 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae JSEC |
627 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
628 | return -EBUSY; \ | |
1da177e4 LT |
629 | val = simple_strtoul(buf, NULL, 0); \ |
630 | i->f->set_rport_##field(rport, val); \ | |
631 | return count; \ | |
632 | } | |
633 | ||
634 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
635 | fc_rport_show_function(field, format_string, sz, ) \ | |
636 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
637 | show_fc_rport_##field, NULL) | |
638 | ||
639 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
640 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
641 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
642 | show_fc_rport_##field, NULL) | |
643 | ||
644 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
645 | fc_rport_show_function(field, format_string, sz, ) \ | |
646 | fc_rport_store_function(field) \ | |
647 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ | |
648 | show_fc_rport_##field, \ | |
649 | store_fc_rport_##field) | |
650 | ||
651 | ||
652 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
653 | static ssize_t \ | |
654 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
655 | { \ | |
656 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
657 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
658 | } | |
659 | ||
660 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
661 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
662 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
663 | show_fc_rport_##field, NULL) | |
664 | ||
665 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
666 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
667 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
668 | show_fc_rport_##field, NULL) | |
669 | ||
670 | ||
671 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
672 | static ssize_t \ | |
673 | show_fc_rport_##title (struct class_device *cdev, char *buf) \ | |
674 | { \ | |
675 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
676 | const char *name; \ | |
677 | name = get_fc_##title##_name(rport->title); \ | |
678 | if (!name) \ | |
679 | return -EINVAL; \ | |
680 | return snprintf(buf, maxlen, "%s\n", name); \ | |
681 | } \ | |
682 | static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \ | |
683 | show_fc_rport_##title, NULL) | |
684 | ||
685 | ||
686 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
687 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
688 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
689 | i->private_rport_attrs[count].store = NULL; \ | |
690 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
691 | if (i->f->show_rport_##field) \ | |
692 | count++ | |
693 | ||
694 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
695 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
696 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
697 | i->private_rport_attrs[count].store = NULL; \ | |
698 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
699 | count++ | |
700 | ||
701 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
702 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
703 | if (!i->f->set_rport_##field) { \ | |
704 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
705 | i->private_rport_attrs[count].store = NULL; \ | |
706 | } \ | |
707 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
708 | if (i->f->show_rport_##field) \ | |
709 | count++ | |
710 | ||
711 | ||
712 | /* The FC Transport Remote Port Attributes: */ | |
713 | ||
714 | /* Fixed Remote Port Attributes */ | |
715 | ||
716 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
717 | ||
718 | static ssize_t | |
719 | show_fc_rport_supported_classes (struct class_device *cdev, char *buf) | |
720 | { | |
721 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
722 | if (rport->supported_classes == FC_COS_UNSPECIFIED) | |
723 | return snprintf(buf, 20, "unspecified\n"); | |
724 | return get_fc_cos_names(rport->supported_classes, buf); | |
725 | } | |
726 | static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO, | |
727 | show_fc_rport_supported_classes, NULL); | |
728 | ||
729 | /* Dynamic Remote Port Attributes */ | |
730 | ||
19a7b4ae JSEC |
731 | /* |
732 | * dev_loss_tmo attribute | |
733 | */ | |
734 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
735 | static ssize_t | |
736 | store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf, | |
737 | size_t count) | |
738 | { | |
739 | int val; | |
740 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
741 | struct Scsi_Host *shost = rport_to_shost(rport); | |
742 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
743 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
42e33148 | 744 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
745 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
746 | return -EBUSY; | |
747 | val = simple_strtoul(buf, NULL, 0); | |
748 | if ((val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
749 | return -EINVAL; | |
750 | i->f->set_rport_dev_loss_tmo(rport, val); | |
751 | return count; | |
752 | } | |
753 | static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, | |
754 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); | |
1da177e4 LT |
755 | |
756 | ||
757 | /* Private Remote Port Attributes */ | |
758 | ||
759 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
760 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
761 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
762 | ||
763 | static ssize_t | |
764 | show_fc_rport_roles (struct class_device *cdev, char *buf) | |
765 | { | |
766 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
767 | ||
768 | /* identify any roles that are port_id specific */ | |
769 | if ((rport->port_id != -1) && | |
770 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
771 | FC_WELLKNOWN_PORTID_MASK) { | |
772 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
773 | case FC_FPORT_PORTID: | |
774 | return snprintf(buf, 30, "Fabric Port\n"); | |
775 | case FC_FABCTLR_PORTID: | |
776 | return snprintf(buf, 30, "Fabric Controller\n"); | |
777 | case FC_DIRSRVR_PORTID: | |
778 | return snprintf(buf, 30, "Directory Server\n"); | |
779 | case FC_TIMESRVR_PORTID: | |
780 | return snprintf(buf, 30, "Time Server\n"); | |
781 | case FC_MGMTSRVR_PORTID: | |
782 | return snprintf(buf, 30, "Management Server\n"); | |
783 | default: | |
784 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
785 | } | |
786 | } else { | |
787 | if (rport->roles == FC_RPORT_ROLE_UNKNOWN) | |
788 | return snprintf(buf, 20, "unknown\n"); | |
789 | return get_fc_remote_port_roles_names(rport->roles, buf); | |
790 | } | |
791 | } | |
792 | static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO, | |
793 | show_fc_rport_roles, NULL); | |
794 | ||
795 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
796 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
797 | ||
798 | ||
799 | ||
800 | /* | |
801 | * FC SCSI Target Attribute Management | |
802 | */ | |
803 | ||
804 | /* | |
805 | * Note: in the target show function we recognize when the remote | |
806 | * port is in the heirarchy and do not allow the driver to get | |
807 | * involved in sysfs functions. The driver only gets involved if | |
808 | * it's the "old" style that doesn't use rports. | |
809 | */ | |
810 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
811 | static ssize_t \ | |
812 | show_fc_starget_##field (struct class_device *cdev, char *buf) \ | |
813 | { \ | |
814 | struct scsi_target *starget = transport_class_to_starget(cdev); \ | |
815 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ | |
816 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
817 | struct fc_rport *rport = starget_to_rport(starget); \ | |
818 | if (rport) \ | |
819 | fc_starget_##field(starget) = rport->field; \ | |
820 | else if (i->f->get_starget_##field) \ | |
821 | i->f->get_starget_##field(starget); \ | |
822 | return snprintf(buf, sz, format_string, \ | |
823 | cast fc_starget_##field(starget)); \ | |
824 | } | |
825 | ||
826 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
827 | fc_starget_show_function(field, format_string, sz, ) \ | |
828 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
829 | show_fc_starget_##field, NULL) | |
830 | ||
831 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
832 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
833 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
834 | show_fc_starget_##field, NULL) | |
835 | ||
836 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
837 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
838 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
839 | i->private_starget_attrs[count].store = NULL; \ | |
840 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
841 | if (i->f->show_starget_##field) \ | |
842 | count++ | |
843 | ||
844 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
845 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
846 | if (!i->f->set_starget_##field) { \ | |
847 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
848 | i->private_starget_attrs[count].store = NULL; \ | |
849 | } \ | |
850 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
851 | if (i->f->show_starget_##field) \ | |
852 | count++ | |
853 | ||
854 | /* The FC Transport SCSI Target Attributes: */ | |
855 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
856 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
857 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
858 | ||
859 | ||
860 | /* | |
861 | * Host Attribute Management | |
862 | */ | |
863 | ||
864 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
865 | static ssize_t \ | |
866 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
867 | { \ | |
868 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
869 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
870 | if (i->f->get_host_##field) \ | |
871 | i->f->get_host_##field(shost); \ | |
872 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
873 | } | |
874 | ||
875 | #define fc_host_store_function(field) \ | |
876 | static ssize_t \ | |
877 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
878 | size_t count) \ | |
879 | { \ | |
880 | int val; \ | |
881 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
882 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
883 | \ | |
884 | val = simple_strtoul(buf, NULL, 0); \ | |
885 | i->f->set_host_##field(shost, val); \ | |
886 | return count; \ | |
887 | } | |
888 | ||
b8d08210 JS |
889 | #define fc_host_store_str_function(field, slen) \ |
890 | static ssize_t \ | |
891 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
892 | size_t count) \ | |
893 | { \ | |
894 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
895 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
896 | unsigned int cnt=count; \ | |
897 | \ | |
898 | /* count may include a LF at end of string */ \ | |
899 | if (buf[cnt-1] == '\n') \ | |
900 | cnt--; \ | |
901 | if (cnt > ((slen) - 1)) \ | |
902 | return -EINVAL; \ | |
903 | memcpy(fc_host_##field(shost), buf, cnt); \ | |
904 | i->f->set_host_##field(shost); \ | |
905 | return count; \ | |
906 | } | |
907 | ||
1da177e4 LT |
908 | #define fc_host_rd_attr(field, format_string, sz) \ |
909 | fc_host_show_function(field, format_string, sz, ) \ | |
910 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
911 | show_fc_host_##field, NULL) | |
912 | ||
913 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
914 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
915 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
916 | show_fc_host_##field, NULL) | |
917 | ||
918 | #define fc_host_rw_attr(field, format_string, sz) \ | |
919 | fc_host_show_function(field, format_string, sz, ) \ | |
920 | fc_host_store_function(field) \ | |
921 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ | |
922 | show_fc_host_##field, \ | |
923 | store_fc_host_##field) | |
924 | ||
925 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
926 | static ssize_t \ | |
927 | show_fc_host_##title (struct class_device *cdev, char *buf) \ | |
928 | { \ | |
929 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
930 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
931 | const char *name; \ | |
932 | if (i->f->get_host_##title) \ | |
933 | i->f->get_host_##title(shost); \ | |
934 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
935 | if (!name) \ | |
936 | return -EINVAL; \ | |
937 | return snprintf(buf, maxlen, "%s\n", name); \ | |
938 | } \ | |
939 | static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) | |
940 | ||
941 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
942 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
943 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
944 | i->private_host_attrs[count].store = NULL; \ | |
945 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
946 | if (i->f->show_host_##field) \ | |
947 | count++ | |
948 | ||
949 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ | |
950 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
951 | if (!i->f->set_host_##field) { \ | |
952 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
953 | i->private_host_attrs[count].store = NULL; \ | |
954 | } \ | |
955 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
956 | if (i->f->show_host_##field) \ | |
957 | count++ | |
958 | ||
959 | ||
960 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
961 | static ssize_t \ | |
962 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
963 | { \ | |
964 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
965 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
966 | } | |
967 | ||
968 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
969 | fc_private_host_show_function(field, format_string, sz, ) \ | |
970 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
971 | show_fc_host_##field, NULL) | |
972 | ||
973 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
974 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
975 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
976 | show_fc_host_##field, NULL) | |
977 | ||
978 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
979 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
980 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
981 | i->private_host_attrs[count].store = NULL; \ | |
982 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
983 | count++ | |
984 | ||
985 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 986 | { \ |
1da177e4 LT |
987 | i->private_host_attrs[count] = class_device_attr_host_##field; \ |
988 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
91ca7b01 AV |
989 | count++; \ |
990 | } | |
1da177e4 LT |
991 | |
992 | ||
993 | /* Fixed Host Attributes */ | |
994 | ||
995 | static ssize_t | |
996 | show_fc_host_supported_classes (struct class_device *cdev, char *buf) | |
997 | { | |
998 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
999 | ||
1000 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
1001 | return snprintf(buf, 20, "unspecified\n"); | |
1002 | ||
1003 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
1004 | } | |
1005 | static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, | |
1006 | show_fc_host_supported_classes, NULL); | |
1007 | ||
1008 | static ssize_t | |
1009 | show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) | |
1010 | { | |
1011 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1012 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); | |
1013 | } | |
1014 | static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, | |
1015 | show_fc_host_supported_fc4s, NULL); | |
1016 | ||
1017 | static ssize_t | |
1018 | show_fc_host_supported_speeds (struct class_device *cdev, char *buf) | |
1019 | { | |
1020 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1021 | ||
1022 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
1023 | return snprintf(buf, 20, "unknown\n"); | |
1024 | ||
1025 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
1026 | } | |
1027 | static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, | |
1028 | show_fc_host_supported_speeds, NULL); | |
1029 | ||
1030 | ||
1031 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1032 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
6b7281d0 AH |
1033 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
1034 | unsigned long long); | |
1da177e4 LT |
1035 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
1036 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); | |
1037 | ||
1038 | ||
1039 | /* Dynamic Host Attributes */ | |
1040 | ||
1041 | static ssize_t | |
1042 | show_fc_host_active_fc4s (struct class_device *cdev, char *buf) | |
1043 | { | |
1044 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1045 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1046 | ||
1047 | if (i->f->get_host_active_fc4s) | |
1048 | i->f->get_host_active_fc4s(shost); | |
1049 | ||
1050 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
1051 | } | |
1052 | static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, | |
1053 | show_fc_host_active_fc4s, NULL); | |
1054 | ||
1055 | static ssize_t | |
1056 | show_fc_host_speed (struct class_device *cdev, char *buf) | |
1057 | { | |
1058 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1059 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1060 | ||
1061 | if (i->f->get_host_speed) | |
1062 | i->f->get_host_speed(shost); | |
1063 | ||
1064 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
1065 | return snprintf(buf, 20, "unknown\n"); | |
1066 | ||
1067 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
1068 | } | |
1069 | static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, | |
1070 | show_fc_host_speed, NULL); | |
1071 | ||
1072 | ||
1073 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
1074 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
1075 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
1076 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
016131b8 | 1077 | fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
1da177e4 | 1078 | |
b8d08210 JS |
1079 | fc_private_host_show_function(system_hostname, "%s\n", |
1080 | FC_SYMBOLIC_NAME_SIZE + 1, ) | |
1081 | fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) | |
1082 | static FC_CLASS_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, | |
1083 | show_fc_host_system_hostname, store_fc_host_system_hostname); | |
1084 | ||
1da177e4 LT |
1085 | |
1086 | /* Private Host Attributes */ | |
1087 | ||
1088 | static ssize_t | |
1089 | show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) | |
1090 | { | |
1091 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1092 | const char *name; | |
1093 | ||
1094 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
1095 | if (!name) | |
1096 | return -EINVAL; | |
1097 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
1098 | } | |
1099 | ||
d16794f6 JSEC |
1100 | #define get_list_head_entry(pos, head, member) \ |
1101 | pos = list_entry((head)->next, typeof(*pos), member) | |
1102 | ||
1da177e4 LT |
1103 | static ssize_t |
1104 | store_fc_private_host_tgtid_bind_type(struct class_device *cdev, | |
1105 | const char *buf, size_t count) | |
1106 | { | |
1107 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
d16794f6 | 1108 | struct fc_rport *rport; |
1da177e4 LT |
1109 | enum fc_tgtid_binding_type val; |
1110 | unsigned long flags; | |
1111 | ||
1112 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
1113 | return -EINVAL; | |
1114 | ||
1115 | /* if changing bind type, purge all unused consistent bindings */ | |
1116 | if (val != fc_host_tgtid_bind_type(shost)) { | |
1117 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
1118 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
1119 | get_list_head_entry(rport, | |
1120 | &fc_host_rport_bindings(shost), peers); | |
aedf3497 JS |
1121 | list_del(&rport->peers); |
1122 | rport->port_state = FC_PORTSTATE_DELETED; | |
1123 | fc_queue_work(shost, &rport->rport_delete_work); | |
d16794f6 | 1124 | } |
1da177e4 LT |
1125 | spin_unlock_irqrestore(shost->host_lock, flags); |
1126 | } | |
1127 | ||
1128 | fc_host_tgtid_bind_type(shost) = val; | |
1129 | return count; | |
1130 | } | |
1131 | ||
1132 | static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, | |
1133 | show_fc_private_host_tgtid_bind_type, | |
1134 | store_fc_private_host_tgtid_bind_type); | |
1135 | ||
91ca7b01 AV |
1136 | static ssize_t |
1137 | store_fc_private_host_issue_lip(struct class_device *cdev, | |
1138 | const char *buf, size_t count) | |
1139 | { | |
1140 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1141 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1142 | int ret; | |
1143 | ||
1144 | /* ignore any data value written to the attribute */ | |
1145 | if (i->f->issue_fc_host_lip) { | |
1146 | ret = i->f->issue_fc_host_lip(shost); | |
1147 | return ret ? ret: count; | |
1148 | } | |
1149 | ||
1150 | return -ENOENT; | |
1151 | } | |
1152 | ||
1153 | static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, | |
1154 | store_fc_private_host_issue_lip); | |
1155 | ||
1da177e4 LT |
1156 | /* |
1157 | * Host Statistics Management | |
1158 | */ | |
1159 | ||
1160 | /* Show a given an attribute in the statistics group */ | |
1161 | static ssize_t | |
1162 | fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) | |
1163 | { | |
1164 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1165 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1166 | struct fc_host_statistics *stats; | |
1167 | ssize_t ret = -ENOENT; | |
1168 | ||
1169 | if (offset > sizeof(struct fc_host_statistics) || | |
1170 | offset % sizeof(u64) != 0) | |
1171 | WARN_ON(1); | |
1172 | ||
1173 | if (i->f->get_fc_host_stats) { | |
1174 | stats = (i->f->get_fc_host_stats)(shost); | |
1175 | if (stats) | |
1176 | ret = snprintf(buf, 20, "0x%llx\n", | |
1177 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
1178 | } | |
1179 | return ret; | |
1180 | } | |
1181 | ||
1182 | ||
1183 | /* generate a read-only statistics attribute */ | |
1184 | #define fc_host_statistic(name) \ | |
1185 | static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ | |
1186 | { \ | |
1187 | return fc_stat_show(cd, buf, \ | |
1188 | offsetof(struct fc_host_statistics, name)); \ | |
1189 | } \ | |
1190 | static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) | |
1191 | ||
1192 | fc_host_statistic(seconds_since_last_reset); | |
1193 | fc_host_statistic(tx_frames); | |
1194 | fc_host_statistic(tx_words); | |
1195 | fc_host_statistic(rx_frames); | |
1196 | fc_host_statistic(rx_words); | |
1197 | fc_host_statistic(lip_count); | |
1198 | fc_host_statistic(nos_count); | |
1199 | fc_host_statistic(error_frames); | |
1200 | fc_host_statistic(dumped_frames); | |
1201 | fc_host_statistic(link_failure_count); | |
1202 | fc_host_statistic(loss_of_sync_count); | |
1203 | fc_host_statistic(loss_of_signal_count); | |
1204 | fc_host_statistic(prim_seq_protocol_err_count); | |
1205 | fc_host_statistic(invalid_tx_word_count); | |
1206 | fc_host_statistic(invalid_crc_count); | |
1207 | fc_host_statistic(fcp_input_requests); | |
1208 | fc_host_statistic(fcp_output_requests); | |
1209 | fc_host_statistic(fcp_control_requests); | |
1210 | fc_host_statistic(fcp_input_megabytes); | |
1211 | fc_host_statistic(fcp_output_megabytes); | |
1212 | ||
1213 | static ssize_t | |
1214 | fc_reset_statistics(struct class_device *cdev, const char *buf, | |
1215 | size_t count) | |
1216 | { | |
1217 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1218 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1219 | ||
1220 | /* ignore any data value written to the attribute */ | |
1221 | if (i->f->reset_fc_host_stats) { | |
1222 | i->f->reset_fc_host_stats(shost); | |
1223 | return count; | |
1224 | } | |
1225 | ||
1226 | return -ENOENT; | |
1227 | } | |
1228 | static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, | |
1229 | fc_reset_statistics); | |
1230 | ||
1231 | ||
1232 | static struct attribute *fc_statistics_attrs[] = { | |
1233 | &class_device_attr_host_seconds_since_last_reset.attr, | |
1234 | &class_device_attr_host_tx_frames.attr, | |
1235 | &class_device_attr_host_tx_words.attr, | |
1236 | &class_device_attr_host_rx_frames.attr, | |
1237 | &class_device_attr_host_rx_words.attr, | |
1238 | &class_device_attr_host_lip_count.attr, | |
1239 | &class_device_attr_host_nos_count.attr, | |
1240 | &class_device_attr_host_error_frames.attr, | |
1241 | &class_device_attr_host_dumped_frames.attr, | |
1242 | &class_device_attr_host_link_failure_count.attr, | |
1243 | &class_device_attr_host_loss_of_sync_count.attr, | |
1244 | &class_device_attr_host_loss_of_signal_count.attr, | |
1245 | &class_device_attr_host_prim_seq_protocol_err_count.attr, | |
1246 | &class_device_attr_host_invalid_tx_word_count.attr, | |
1247 | &class_device_attr_host_invalid_crc_count.attr, | |
1248 | &class_device_attr_host_fcp_input_requests.attr, | |
1249 | &class_device_attr_host_fcp_output_requests.attr, | |
1250 | &class_device_attr_host_fcp_control_requests.attr, | |
1251 | &class_device_attr_host_fcp_input_megabytes.attr, | |
1252 | &class_device_attr_host_fcp_output_megabytes.attr, | |
1253 | &class_device_attr_host_reset_statistics.attr, | |
1254 | NULL | |
1255 | }; | |
1256 | ||
1257 | static struct attribute_group fc_statistics_group = { | |
1258 | .name = "statistics", | |
1259 | .attrs = fc_statistics_attrs, | |
1260 | }; | |
1261 | ||
1262 | static int fc_host_match(struct attribute_container *cont, | |
1263 | struct device *dev) | |
1264 | { | |
1265 | struct Scsi_Host *shost; | |
1266 | struct fc_internal *i; | |
1267 | ||
1268 | if (!scsi_is_host_device(dev)) | |
1269 | return 0; | |
1270 | ||
1271 | shost = dev_to_shost(dev); | |
1272 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1273 | != &fc_host_class.class) | |
1274 | return 0; | |
1275 | ||
1276 | i = to_fc_internal(shost->transportt); | |
1277 | ||
1278 | return &i->t.host_attrs.ac == cont; | |
1279 | } | |
1280 | ||
1281 | static int fc_target_match(struct attribute_container *cont, | |
1282 | struct device *dev) | |
1283 | { | |
1284 | struct Scsi_Host *shost; | |
1285 | struct fc_internal *i; | |
1286 | ||
1287 | if (!scsi_is_target_device(dev)) | |
1288 | return 0; | |
1289 | ||
1290 | shost = dev_to_shost(dev->parent); | |
1291 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1292 | != &fc_host_class.class) | |
1293 | return 0; | |
1294 | ||
1295 | i = to_fc_internal(shost->transportt); | |
1296 | ||
1297 | return &i->t.target_attrs.ac == cont; | |
1298 | } | |
1299 | ||
1300 | static void fc_rport_dev_release(struct device *dev) | |
1301 | { | |
1302 | struct fc_rport *rport = dev_to_rport(dev); | |
1303 | put_device(dev->parent); | |
1304 | kfree(rport); | |
1305 | } | |
1306 | ||
1307 | int scsi_is_fc_rport(const struct device *dev) | |
1308 | { | |
1309 | return dev->release == fc_rport_dev_release; | |
1310 | } | |
1311 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1312 | ||
1313 | static int fc_rport_match(struct attribute_container *cont, | |
1314 | struct device *dev) | |
1315 | { | |
1316 | struct Scsi_Host *shost; | |
1317 | struct fc_internal *i; | |
1318 | ||
1319 | if (!scsi_is_fc_rport(dev)) | |
1320 | return 0; | |
1321 | ||
1322 | shost = dev_to_shost(dev->parent); | |
1323 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1324 | != &fc_host_class.class) | |
1325 | return 0; | |
1326 | ||
1327 | i = to_fc_internal(shost->transportt); | |
1328 | ||
1329 | return &i->rport_attr_cont.ac == cont; | |
1330 | } | |
1331 | ||
5c44cd2a | 1332 | |
c829c394 JS |
1333 | /** |
1334 | * fc_timed_out - FC Transport I/O timeout intercept handler | |
1335 | * | |
1336 | * @scmd: The SCSI command which timed out | |
1337 | * | |
1338 | * This routine protects against error handlers getting invoked while a | |
1339 | * rport is in a blocked state, typically due to a temporarily loss of | |
1340 | * connectivity. If the error handlers are allowed to proceed, requests | |
1341 | * to abort i/o, reset the target, etc will likely fail as there is no way | |
1342 | * to communicate with the device to perform the requested function. These | |
1343 | * failures may result in the midlayer taking the device offline, requiring | |
1344 | * manual intervention to restore operation. | |
1345 | * | |
1346 | * This routine, called whenever an i/o times out, validates the state of | |
1347 | * the underlying rport. If the rport is blocked, it returns | |
1348 | * EH_RESET_TIMER, which will continue to reschedule the timeout. | |
1349 | * Eventually, either the device will return, or devloss_tmo will fire, | |
1350 | * and when the timeout then fires, it will be handled normally. | |
1351 | * If the rport is not blocked, normal error handling continues. | |
1352 | * | |
1353 | * Notes: | |
1354 | * This routine assumes no locks are held on entry. | |
1355 | **/ | |
1356 | static enum scsi_eh_timer_return | |
1357 | fc_timed_out(struct scsi_cmnd *scmd) | |
1358 | { | |
1359 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); | |
1360 | ||
1361 | if (rport->port_state == FC_PORTSTATE_BLOCKED) | |
1362 | return EH_RESET_TIMER; | |
1363 | ||
1364 | return EH_NOT_HANDLED; | |
1365 | } | |
1366 | ||
5c44cd2a JSEC |
1367 | /* |
1368 | * Must be called with shost->host_lock held | |
1369 | */ | |
e02f3f59 CH |
1370 | static int fc_user_scan(struct Scsi_Host *shost, uint channel, |
1371 | uint id, uint lun) | |
5c44cd2a JSEC |
1372 | { |
1373 | struct fc_rport *rport; | |
1374 | ||
e02f3f59 CH |
1375 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
1376 | if (rport->scsi_target_id == -1) | |
1377 | continue; | |
5c44cd2a | 1378 | |
e02f3f59 CH |
1379 | if ((channel == SCAN_WILD_CARD || channel == rport->channel) && |
1380 | (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) { | |
1381 | scsi_scan_target(&rport->dev, rport->channel, | |
1382 | rport->scsi_target_id, lun, 1); | |
1383 | } | |
1384 | } | |
1385 | ||
1386 | return 0; | |
5c44cd2a JSEC |
1387 | } |
1388 | ||
1da177e4 LT |
1389 | struct scsi_transport_template * |
1390 | fc_attach_transport(struct fc_function_template *ft) | |
1391 | { | |
1da177e4 | 1392 | int count; |
24669f75 JS |
1393 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
1394 | GFP_KERNEL); | |
1da177e4 LT |
1395 | |
1396 | if (unlikely(!i)) | |
1397 | return NULL; | |
1398 | ||
1da177e4 LT |
1399 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
1400 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
1401 | i->t.target_attrs.ac.match = fc_target_match; | |
1402 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
1403 | transport_container_register(&i->t.target_attrs); | |
1404 | ||
1405 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1406 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
1407 | i->t.host_attrs.ac.match = fc_host_match; | |
1408 | i->t.host_size = sizeof(struct fc_host_attrs); | |
1409 | if (ft->get_fc_host_stats) | |
1410 | i->t.host_attrs.statistics = &fc_statistics_group; | |
1411 | transport_container_register(&i->t.host_attrs); | |
1412 | ||
1413 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
1414 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
1415 | i->rport_attr_cont.ac.match = fc_rport_match; | |
1416 | transport_container_register(&i->rport_attr_cont); | |
1417 | ||
1418 | i->f = ft; | |
1419 | ||
1420 | /* Transport uses the shost workq for scsi scanning */ | |
1421 | i->t.create_work_queue = 1; | |
5c44cd2a | 1422 | |
c829c394 JS |
1423 | i->t.eh_timed_out = fc_timed_out; |
1424 | ||
e02f3f59 | 1425 | i->t.user_scan = fc_user_scan; |
1da177e4 LT |
1426 | |
1427 | /* | |
1428 | * Setup SCSI Target Attributes. | |
1429 | */ | |
1430 | count = 0; | |
1431 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
1432 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
1433 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
1434 | ||
1435 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
1436 | ||
1437 | i->starget_attrs[count] = NULL; | |
1438 | ||
1439 | ||
1440 | /* | |
1441 | * Setup SCSI Host Attributes. | |
1442 | */ | |
1443 | count=0; | |
1444 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
1445 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
6b7281d0 | 1446 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
1da177e4 LT |
1447 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
1448 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1da177e4 LT |
1449 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
1450 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
1451 | SETUP_HOST_ATTRIBUTE_RD(serial_number); | |
1452 | ||
1453 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
1454 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
1455 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
1456 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
1457 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
1458 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
016131b8 | 1459 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
b8d08210 | 1460 | SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
1da177e4 LT |
1461 | |
1462 | /* Transport-managed attributes */ | |
1463 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); | |
91ca7b01 AV |
1464 | if (ft->issue_fc_host_lip) |
1465 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
1da177e4 LT |
1466 | |
1467 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
1468 | ||
1469 | i->host_attrs[count] = NULL; | |
1470 | ||
1471 | /* | |
1472 | * Setup Remote Port Attributes. | |
1473 | */ | |
1474 | count=0; | |
1475 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
1476 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
1477 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
1478 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
1479 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
1480 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
1481 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
1482 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
1483 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
1484 | ||
1485 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
1486 | ||
1487 | i->rport_attrs[count] = NULL; | |
1488 | ||
1489 | return &i->t; | |
1490 | } | |
1491 | EXPORT_SYMBOL(fc_attach_transport); | |
1492 | ||
1493 | void fc_release_transport(struct scsi_transport_template *t) | |
1494 | { | |
1495 | struct fc_internal *i = to_fc_internal(t); | |
1496 | ||
1497 | transport_container_unregister(&i->t.target_attrs); | |
1498 | transport_container_unregister(&i->t.host_attrs); | |
1499 | transport_container_unregister(&i->rport_attr_cont); | |
1500 | ||
1501 | kfree(i); | |
1502 | } | |
1503 | EXPORT_SYMBOL(fc_release_transport); | |
1504 | ||
aedf3497 JS |
1505 | /** |
1506 | * fc_queue_work - Queue work to the fc_host workqueue. | |
1507 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1508 | * @work: Work to queue for execution. | |
1509 | * | |
1510 | * Return value: | |
a0785edf JS |
1511 | * 1 - work queued for execution |
1512 | * 0 - work is already queued | |
1513 | * -EINVAL - work queue doesn't exist | |
aedf3497 JS |
1514 | **/ |
1515 | static int | |
1516 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) | |
1517 | { | |
1518 | if (unlikely(!fc_host_work_q(shost))) { | |
1519 | printk(KERN_ERR | |
1520 | "ERROR: FC host '%s' attempted to queue work, " | |
1521 | "when no workqueue created.\n", shost->hostt->name); | |
1522 | dump_stack(); | |
1523 | ||
1524 | return -EINVAL; | |
1525 | } | |
1526 | ||
1527 | return queue_work(fc_host_work_q(shost), work); | |
1528 | } | |
1529 | ||
1530 | /** | |
1531 | * fc_flush_work - Flush a fc_host's workqueue. | |
1532 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1533 | **/ | |
1534 | static void | |
1535 | fc_flush_work(struct Scsi_Host *shost) | |
1536 | { | |
1537 | if (!fc_host_work_q(shost)) { | |
1538 | printk(KERN_ERR | |
1539 | "ERROR: FC host '%s' attempted to flush work, " | |
1540 | "when no workqueue created.\n", shost->hostt->name); | |
1541 | dump_stack(); | |
1542 | return; | |
1543 | } | |
1544 | ||
1545 | flush_workqueue(fc_host_work_q(shost)); | |
1546 | } | |
1547 | ||
1548 | /** | |
1549 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. | |
1550 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1551 | * @work: Work to queue for execution. | |
1552 | * @delay: jiffies to delay the work queuing | |
1553 | * | |
1554 | * Return value: | |
1555 | * 0 on success / != 0 for error | |
1556 | **/ | |
1557 | static int | |
1558 | fc_queue_devloss_work(struct Scsi_Host *shost, struct work_struct *work, | |
1559 | unsigned long delay) | |
1560 | { | |
1561 | if (unlikely(!fc_host_devloss_work_q(shost))) { | |
1562 | printk(KERN_ERR | |
1563 | "ERROR: FC host '%s' attempted to queue work, " | |
1564 | "when no workqueue created.\n", shost->hostt->name); | |
1565 | dump_stack(); | |
1566 | ||
1567 | return -EINVAL; | |
1568 | } | |
1569 | ||
1570 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); | |
1571 | } | |
1572 | ||
1573 | /** | |
1574 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. | |
1575 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1576 | **/ | |
1577 | static void | |
1578 | fc_flush_devloss(struct Scsi_Host *shost) | |
1579 | { | |
1580 | if (!fc_host_devloss_work_q(shost)) { | |
1581 | printk(KERN_ERR | |
1582 | "ERROR: FC host '%s' attempted to flush work, " | |
1583 | "when no workqueue created.\n", shost->hostt->name); | |
1584 | dump_stack(); | |
1585 | return; | |
1586 | } | |
1587 | ||
1588 | flush_workqueue(fc_host_devloss_work_q(shost)); | |
1589 | } | |
1590 | ||
1da177e4 LT |
1591 | |
1592 | /** | |
1593 | * fc_remove_host - called to terminate any fc_transport-related elements | |
1594 | * for a scsi host. | |
1595 | * @rport: remote port to be unblocked. | |
1596 | * | |
1597 | * This routine is expected to be called immediately preceeding the | |
1598 | * a driver's call to scsi_remove_host(). | |
1599 | * | |
1600 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
1601 | * this routine prior to scsi_remote_host(), will leave dangling | |
1602 | * objects in /sys/class/fc_remote_ports. Access to any of these | |
1603 | * objects can result in a system crash !!! | |
1604 | * | |
1605 | * Notes: | |
1606 | * This routine assumes no locks are held on entry. | |
1607 | **/ | |
1608 | void | |
1609 | fc_remove_host(struct Scsi_Host *shost) | |
1610 | { | |
1611 | struct fc_rport *rport, *next_rport; | |
aedf3497 JS |
1612 | struct workqueue_struct *work_q; |
1613 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
1da177e4 LT |
1614 | |
1615 | /* Remove any remote ports */ | |
1616 | list_for_each_entry_safe(rport, next_rport, | |
aedf3497 JS |
1617 | &fc_host->rports, peers) { |
1618 | list_del(&rport->peers); | |
1619 | rport->port_state = FC_PORTSTATE_DELETED; | |
1620 | fc_queue_work(shost, &rport->rport_delete_work); | |
1621 | } | |
1622 | ||
1da177e4 | 1623 | list_for_each_entry_safe(rport, next_rport, |
aedf3497 JS |
1624 | &fc_host->rport_bindings, peers) { |
1625 | list_del(&rport->peers); | |
1626 | rport->port_state = FC_PORTSTATE_DELETED; | |
1627 | fc_queue_work(shost, &rport->rport_delete_work); | |
1628 | } | |
1629 | ||
1630 | /* flush all scan work items */ | |
1631 | scsi_flush_work(shost); | |
1632 | ||
1633 | /* flush all stgt delete, and rport delete work items, then kill it */ | |
1634 | if (fc_host->work_q) { | |
1635 | work_q = fc_host->work_q; | |
1636 | fc_host->work_q = NULL; | |
1637 | destroy_workqueue(work_q); | |
1638 | } | |
1639 | ||
1640 | /* flush all devloss work items, then kill it */ | |
1641 | if (fc_host->devloss_work_q) { | |
1642 | work_q = fc_host->devloss_work_q; | |
1643 | fc_host->devloss_work_q = NULL; | |
1644 | destroy_workqueue(work_q); | |
1645 | } | |
1da177e4 LT |
1646 | } |
1647 | EXPORT_SYMBOL(fc_remove_host); | |
1648 | ||
aedf3497 JS |
1649 | |
1650 | /** | |
1651 | * fc_starget_delete - called to delete the scsi decendents of an rport | |
1652 | * (target and all sdevs) | |
1653 | * | |
1654 | * @data: remote port to be operated on. | |
1655 | **/ | |
19a7b4ae | 1656 | static void |
aedf3497 | 1657 | fc_starget_delete(void *data) |
19a7b4ae | 1658 | { |
aedf3497 | 1659 | struct fc_rport *rport = (struct fc_rport *)data; |
19a7b4ae | 1660 | struct Scsi_Host *shost = rport_to_shost(rport); |
aedf3497 | 1661 | unsigned long flags; |
19a7b4ae | 1662 | |
aedf3497 JS |
1663 | spin_lock_irqsave(shost->host_lock, flags); |
1664 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { | |
1665 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1666 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
1667 | fc_flush_devloss(shost); | |
1668 | spin_lock_irqsave(shost->host_lock, flags); | |
1669 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
1670 | } | |
1671 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
1672 | |
1673 | scsi_remove_target(&rport->dev); | |
1674 | } | |
1675 | ||
aedf3497 JS |
1676 | |
1677 | /** | |
1678 | * fc_rport_final_delete - finish rport termination and delete it. | |
1679 | * | |
1680 | * @data: remote port to be deleted. | |
1681 | **/ | |
1682 | static void | |
1683 | fc_rport_final_delete(void *data) | |
1684 | { | |
1685 | struct fc_rport *rport = (struct fc_rport *)data; | |
1686 | struct device *dev = &rport->dev; | |
1687 | struct Scsi_Host *shost = rport_to_shost(rport); | |
1688 | ||
1689 | /* Delete SCSI target and sdevs */ | |
1690 | if (rport->scsi_target_id != -1) | |
1691 | fc_starget_delete(data); | |
1692 | ||
1693 | /* | |
1694 | * if a scan is pending, flush the SCSI Host work_q so that | |
1695 | * that we can reclaim the rport scan work element. | |
1696 | */ | |
1697 | if (rport->flags & FC_RPORT_SCAN_PENDING) | |
1698 | scsi_flush_work(shost); | |
1699 | ||
1700 | transport_remove_device(dev); | |
1701 | device_del(dev); | |
1702 | transport_destroy_device(dev); | |
3bdad7bd JS |
1703 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1704 | put_device(dev); /* for self-reference */ | |
aedf3497 JS |
1705 | } |
1706 | ||
1707 | ||
1da177e4 LT |
1708 | /** |
1709 | * fc_rport_create - allocates and creates a remote FC port. | |
1710 | * @shost: scsi host the remote port is connected to. | |
1711 | * @channel: Channel on shost port connected to. | |
1712 | * @ids: The world wide names, fc address, and FC4 port | |
1713 | * roles for the remote port. | |
1714 | * | |
1715 | * Allocates and creates the remoter port structure, including the | |
1716 | * class and sysfs creation. | |
1717 | * | |
1718 | * Notes: | |
1719 | * This routine assumes no locks are held on entry. | |
1720 | **/ | |
1721 | struct fc_rport * | |
1722 | fc_rport_create(struct Scsi_Host *shost, int channel, | |
1723 | struct fc_rport_identifiers *ids) | |
1724 | { | |
aedf3497 | 1725 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
1726 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
1727 | struct fc_rport *rport; | |
1728 | struct device *dev; | |
1729 | unsigned long flags; | |
1730 | int error; | |
1731 | size_t size; | |
1732 | ||
1733 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
24669f75 | 1734 | rport = kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
1735 | if (unlikely(!rport)) { |
1736 | printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); | |
1737 | return NULL; | |
1738 | } | |
1da177e4 LT |
1739 | |
1740 | rport->maxframe_size = -1; | |
1741 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1742 | rport->dev_loss_tmo = fc_dev_loss_tmo; | |
1743 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); | |
1744 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
1745 | rport->port_id = ids->port_id; | |
1746 | rport->roles = ids->roles; | |
1747 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1748 | if (fci->f->dd_fcrport_size) | |
1749 | rport->dd_data = &rport[1]; | |
1750 | rport->channel = channel; | |
1751 | ||
19a7b4ae | 1752 | INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport); |
1da177e4 | 1753 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport); |
aedf3497 JS |
1754 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete, rport); |
1755 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete, rport); | |
1da177e4 LT |
1756 | |
1757 | spin_lock_irqsave(shost->host_lock, flags); | |
1758 | ||
1759 | rport->number = fc_host->next_rport_number++; | |
1760 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1761 | rport->scsi_target_id = fc_host->next_target_id++; | |
1762 | else | |
1763 | rport->scsi_target_id = -1; | |
aedf3497 | 1764 | list_add_tail(&rport->peers, &fc_host->rports); |
3bdad7bd | 1765 | get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
1766 | |
1767 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1768 | ||
1769 | dev = &rport->dev; | |
3bdad7bd JS |
1770 | device_initialize(dev); /* takes self reference */ |
1771 | dev->parent = get_device(&shost->shost_gendev); /* parent reference */ | |
1da177e4 LT |
1772 | dev->release = fc_rport_dev_release; |
1773 | sprintf(dev->bus_id, "rport-%d:%d-%d", | |
1774 | shost->host_no, channel, rport->number); | |
1775 | transport_setup_device(dev); | |
1776 | ||
1777 | error = device_add(dev); | |
1778 | if (error) { | |
1779 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
1780 | goto delete_rport; | |
1781 | } | |
1782 | transport_add_device(dev); | |
1783 | transport_configure_device(dev); | |
1784 | ||
aedf3497 | 1785 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) { |
1da177e4 | 1786 | /* initiate a scan of the target */ |
aedf3497 | 1787 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 1788 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 1789 | } |
1da177e4 LT |
1790 | |
1791 | return rport; | |
1792 | ||
1793 | delete_rport: | |
1794 | transport_destroy_device(dev); | |
1da177e4 LT |
1795 | spin_lock_irqsave(shost->host_lock, flags); |
1796 | list_del(&rport->peers); | |
3bdad7bd | 1797 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
1798 | spin_unlock_irqrestore(shost->host_lock, flags); |
1799 | put_device(dev->parent); | |
1800 | kfree(rport); | |
1801 | return NULL; | |
1802 | } | |
1803 | ||
1804 | /** | |
1805 | * fc_remote_port_add - notifies the fc transport of the existence | |
1806 | * of a remote FC port. | |
1807 | * @shost: scsi host the remote port is connected to. | |
1808 | * @channel: Channel on shost port connected to. | |
1809 | * @ids: The world wide names, fc address, and FC4 port | |
1810 | * roles for the remote port. | |
1811 | * | |
1812 | * The LLDD calls this routine to notify the transport of the existence | |
1813 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
1814 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
1815 | * active for the port. | |
1816 | * | |
1817 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
1818 | * maintains consistent target id bindings on behalf of the LLDD. | |
1819 | * A consistent target id binding is an assignment of a target id to | |
1820 | * a remote port identifier, which persists while the scsi host is | |
1821 | * attached. The remote port can disappear, then later reappear, and | |
1822 | * it's target id assignment remains the same. This allows for shifts | |
1823 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
1824 | * changes to the scsi subsystem which is based on scsi host number and | |
1825 | * target id values. Bindings are only valid during the attachment of | |
1826 | * the scsi host. If the host detaches, then later re-attaches, target | |
1827 | * id bindings may change. | |
1828 | * | |
1829 | * This routine is responsible for returning a remote port structure. | |
1830 | * The routine will search the list of remote ports it maintains | |
1831 | * internally on behalf of consistent target id mappings. If found, the | |
1832 | * remote port structure will be reused. Otherwise, a new remote port | |
1833 | * structure will be allocated. | |
1834 | * | |
1835 | * Whenever a remote port is allocated, a new fc_remote_port class | |
1836 | * device is created. | |
1837 | * | |
1838 | * Should not be called from interrupt context. | |
1839 | * | |
1840 | * Notes: | |
1841 | * This routine assumes no locks are held on entry. | |
1842 | **/ | |
1843 | struct fc_rport * | |
1844 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
1845 | struct fc_rport_identifiers *ids) | |
1846 | { | |
19a7b4ae | 1847 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
aedf3497 | 1848 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
1849 | struct fc_rport *rport; |
1850 | unsigned long flags; | |
1851 | int match = 0; | |
1852 | ||
aedf3497 JS |
1853 | /* ensure any stgt delete functions are done */ |
1854 | fc_flush_work(shost); | |
1855 | ||
19a7b4ae JSEC |
1856 | /* |
1857 | * Search the list of "active" rports, for an rport that has been | |
1858 | * deleted, but we've held off the real delete while the target | |
1859 | * is in a "blocked" state. | |
1860 | */ | |
1861 | spin_lock_irqsave(shost->host_lock, flags); | |
1862 | ||
aedf3497 | 1863 | list_for_each_entry(rport, &fc_host->rports, peers) { |
19a7b4ae JSEC |
1864 | |
1865 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
1866 | (rport->channel == channel)) { | |
1867 | ||
aedf3497 | 1868 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
1869 | case FC_TGTID_BIND_BY_WWPN: |
1870 | case FC_TGTID_BIND_NONE: | |
1871 | if (rport->port_name == ids->port_name) | |
1872 | match = 1; | |
1873 | break; | |
1874 | case FC_TGTID_BIND_BY_WWNN: | |
1875 | if (rport->node_name == ids->node_name) | |
1876 | match = 1; | |
1877 | break; | |
1878 | case FC_TGTID_BIND_BY_ID: | |
1879 | if (rport->port_id == ids->port_id) | |
1880 | match = 1; | |
1881 | break; | |
1882 | } | |
1883 | ||
1884 | if (match) { | |
1885 | struct work_struct *work = | |
1886 | &rport->dev_loss_work; | |
1887 | ||
1888 | memcpy(&rport->node_name, &ids->node_name, | |
1889 | sizeof(rport->node_name)); | |
1890 | memcpy(&rport->port_name, &ids->port_name, | |
1891 | sizeof(rport->port_name)); | |
1892 | rport->port_id = ids->port_id; | |
1893 | ||
1894 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1895 | rport->roles = ids->roles; | |
1896 | ||
1897 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1898 | ||
1899 | if (fci->f->dd_fcrport_size) | |
1900 | memset(rport->dd_data, 0, | |
1901 | fci->f->dd_fcrport_size); | |
1902 | ||
1903 | /* | |
1904 | * If we were blocked, we were a target. | |
1905 | * If no longer a target, we leave the timer | |
1906 | * running in case the port changes roles | |
1907 | * prior to the timer expiring. If the timer | |
1908 | * fires, the target will be torn down. | |
1909 | */ | |
1910 | if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET)) | |
1911 | return rport; | |
1912 | ||
1913 | /* restart the target */ | |
1914 | ||
1915 | /* | |
1916 | * Stop the target timer first. Take no action | |
1917 | * on the del_timer failure as the state | |
1918 | * machine state change will validate the | |
1919 | * transaction. | |
1920 | */ | |
1921 | if (!cancel_delayed_work(work)) | |
aedf3497 JS |
1922 | fc_flush_devloss(shost); |
1923 | ||
1924 | spin_lock_irqsave(shost->host_lock, flags); | |
1925 | ||
1926 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
19a7b4ae JSEC |
1927 | |
1928 | /* initiate a scan of the target */ | |
aedf3497 | 1929 | rport->flags |= FC_RPORT_SCAN_PENDING; |
19a7b4ae JSEC |
1930 | scsi_queue_work(shost, &rport->scan_work); |
1931 | ||
aedf3497 JS |
1932 | spin_unlock_irqrestore(shost->host_lock, flags); |
1933 | ||
a0785edf JS |
1934 | scsi_target_unblock(&rport->dev); |
1935 | ||
19a7b4ae JSEC |
1936 | return rport; |
1937 | } | |
1938 | } | |
1939 | } | |
1940 | ||
1941 | /* Search the bindings array */ | |
aedf3497 | 1942 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
1da177e4 LT |
1943 | |
1944 | /* search for a matching consistent binding */ | |
1945 | ||
aedf3497 | 1946 | list_for_each_entry(rport, &fc_host->rport_bindings, |
1da177e4 LT |
1947 | peers) { |
1948 | if (rport->channel != channel) | |
1949 | continue; | |
1950 | ||
aedf3497 | 1951 | switch (fc_host->tgtid_bind_type) { |
1da177e4 LT |
1952 | case FC_TGTID_BIND_BY_WWPN: |
1953 | if (rport->port_name == ids->port_name) | |
1954 | match = 1; | |
1955 | break; | |
1956 | case FC_TGTID_BIND_BY_WWNN: | |
1957 | if (rport->node_name == ids->node_name) | |
1958 | match = 1; | |
1959 | break; | |
1960 | case FC_TGTID_BIND_BY_ID: | |
1961 | if (rport->port_id == ids->port_id) | |
1962 | match = 1; | |
1963 | break; | |
1964 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
1965 | break; | |
1966 | } | |
1967 | ||
1968 | if (match) { | |
aedf3497 | 1969 | list_move_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
1970 | break; |
1971 | } | |
1972 | } | |
1973 | ||
1da177e4 LT |
1974 | if (match) { |
1975 | memcpy(&rport->node_name, &ids->node_name, | |
1976 | sizeof(rport->node_name)); | |
1977 | memcpy(&rport->port_name, &ids->port_name, | |
1978 | sizeof(rport->port_name)); | |
1979 | rport->port_id = ids->port_id; | |
1980 | rport->roles = ids->roles; | |
1981 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1982 | ||
19a7b4ae JSEC |
1983 | if (fci->f->dd_fcrport_size) |
1984 | memset(rport->dd_data, 0, | |
1985 | fci->f->dd_fcrport_size); | |
1986 | ||
aedf3497 | 1987 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) { |
1da177e4 | 1988 | /* initiate a scan of the target */ |
aedf3497 | 1989 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 1990 | scsi_queue_work(shost, &rport->scan_work); |
a0785edf JS |
1991 | spin_unlock_irqrestore(shost->host_lock, flags); |
1992 | scsi_target_unblock(&rport->dev); | |
1993 | } else | |
1994 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
1995 | |
1996 | return rport; | |
1997 | } | |
1998 | } | |
1999 | ||
19a7b4ae JSEC |
2000 | spin_unlock_irqrestore(shost->host_lock, flags); |
2001 | ||
1da177e4 LT |
2002 | /* No consistent binding found - create new remote port entry */ |
2003 | rport = fc_rport_create(shost, channel, ids); | |
2004 | ||
2005 | return rport; | |
2006 | } | |
2007 | EXPORT_SYMBOL(fc_remote_port_add); | |
2008 | ||
1da177e4 LT |
2009 | |
2010 | /** | |
2011 | * fc_remote_port_delete - notifies the fc transport that a remote | |
2012 | * port is no longer in existence. | |
2013 | * @rport: The remote port that no longer exists | |
2014 | * | |
2015 | * The LLDD calls this routine to notify the transport that a remote | |
2016 | * port is no longer part of the topology. Note: Although a port | |
2017 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae JSEC |
2018 | * ports displayed by the fc_host. We do this under 2 conditions: |
2019 | * - If the port was a scsi target, we delay its deletion by "blocking" it. | |
2020 | * This allows the port to temporarily disappear, then reappear without | |
2021 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
2022 | * period the port will still exist. | |
2023 | * - If the port was a scsi target and disappears for longer than we | |
2024 | * expect, we'll delete the port and the tear down the SCSI device tree | |
2025 | * attached to it. However, we want to semi-persist the target id assigned | |
2026 | * to that port if it eventually does exist. The port structure will | |
2027 | * remain (although with minimal information) so that the target id | |
2028 | * bindings remails. | |
1da177e4 LT |
2029 | * |
2030 | * If the remote port is not an FCP Target, it will be fully torn down | |
2031 | * and deallocated, including the fc_remote_port class device. | |
2032 | * | |
19a7b4ae JSEC |
2033 | * If the remote port is an FCP Target, the port will be placed in a |
2034 | * temporary blocked state. From the LLDD's perspective, the rport no | |
2035 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
2036 | * exists, but all sdevs on it are blocked from further I/O. The following | |
2037 | * is then expected: | |
2038 | * If the remote port does not return (signaled by a LLDD call to | |
2039 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
2040 | * scsi target is removed - killing all outstanding i/o and removing the | |
2041 | * scsi devices attached ot it. The port structure will be marked Not | |
2042 | * Present and be partially cleared, leaving only enough information to | |
2043 | * recognize the remote port relative to the scsi target id binding if | |
2044 | * it later appears. The port will remain as long as there is a valid | |
2045 | * binding (e.g. until the user changes the binding type or unloads the | |
2046 | * scsi host with the binding). | |
1da177e4 | 2047 | * |
19a7b4ae JSEC |
2048 | * If the remote port returns within the dev_loss_tmo value (and matches |
2049 | * according to the target id binding type), the port structure will be | |
2050 | * reused. If it is no longer a SCSI target, the target will be torn | |
2051 | * down. If it continues to be a SCSI target, then the target will be | |
2052 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
2053 | * to ensure that all luns are detected. | |
2054 | * | |
2055 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
2056 | * |
2057 | * Notes: | |
2058 | * This routine assumes no locks are held on entry. | |
2059 | **/ | |
2060 | void | |
2061 | fc_remote_port_delete(struct fc_rport *rport) | |
2062 | { | |
aedf3497 | 2063 | struct Scsi_Host *shost = rport_to_shost(rport); |
19a7b4ae | 2064 | int timeout = rport->dev_loss_tmo; |
aedf3497 JS |
2065 | unsigned long flags; |
2066 | ||
2067 | /* | |
2068 | * No need to flush the fc_host work_q's, as all adds are synchronous. | |
2069 | * | |
2070 | * We do need to reclaim the rport scan work element, so eventually | |
2071 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if | |
2072 | * there's still a scan pending. | |
2073 | */ | |
2074 | ||
2075 | spin_lock_irqsave(shost->host_lock, flags); | |
1da177e4 | 2076 | |
19a7b4ae JSEC |
2077 | /* If no scsi target id mapping, delete it */ |
2078 | if (rport->scsi_target_id == -1) { | |
aedf3497 JS |
2079 | list_del(&rport->peers); |
2080 | rport->port_state = FC_PORTSTATE_DELETED; | |
2081 | fc_queue_work(shost, &rport->rport_delete_work); | |
2082 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
2083 | return; |
2084 | } | |
2085 | ||
aedf3497 JS |
2086 | rport->port_state = FC_PORTSTATE_BLOCKED; |
2087 | ||
2088 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; | |
2089 | ||
2090 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2091 | ||
19a7b4ae | 2092 | scsi_target_block(&rport->dev); |
1da177e4 | 2093 | |
19a7b4ae | 2094 | /* cap the length the devices can be blocked until they are deleted */ |
aedf3497 | 2095 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
1da177e4 LT |
2096 | } |
2097 | EXPORT_SYMBOL(fc_remote_port_delete); | |
2098 | ||
2099 | /** | |
2100 | * fc_remote_port_rolechg - notifies the fc transport that the roles | |
2101 | * on a remote may have changed. | |
2102 | * @rport: The remote port that changed. | |
2103 | * | |
2104 | * The LLDD calls this routine to notify the transport that the roles | |
2105 | * on a remote port may have changed. The largest effect of this is | |
2106 | * if a port now becomes a FCP Target, it must be allocated a | |
2107 | * scsi target id. If the port is no longer a FCP target, any | |
2108 | * scsi target id value assigned to it will persist in case the | |
2109 | * role changes back to include FCP Target. No changes in the scsi | |
2110 | * midlayer will be invoked if the role changes (in the expectation | |
2111 | * that the role will be resumed. If it doesn't normal error processing | |
2112 | * will take place). | |
2113 | * | |
2114 | * Should not be called from interrupt context. | |
2115 | * | |
2116 | * Notes: | |
2117 | * This routine assumes no locks are held on entry. | |
2118 | **/ | |
2119 | void | |
2120 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
2121 | { | |
2122 | struct Scsi_Host *shost = rport_to_shost(rport); | |
aedf3497 | 2123 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2124 | unsigned long flags; |
2125 | int create = 0; | |
2126 | ||
1da177e4 | 2127 | spin_lock_irqsave(shost->host_lock, flags); |
19a7b4ae JSEC |
2128 | if (roles & FC_RPORT_ROLE_FCP_TARGET) { |
2129 | if (rport->scsi_target_id == -1) { | |
2130 | rport->scsi_target_id = fc_host->next_target_id++; | |
2131 | create = 1; | |
2132 | } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) | |
2133 | create = 1; | |
1da177e4 | 2134 | } |
1da177e4 | 2135 | |
19a7b4ae JSEC |
2136 | rport->roles = roles; |
2137 | ||
aedf3497 JS |
2138 | spin_unlock_irqrestore(shost->host_lock, flags); |
2139 | ||
19a7b4ae JSEC |
2140 | if (create) { |
2141 | /* | |
2142 | * There may have been a delete timer running on the | |
2143 | * port. Ensure that it is cancelled as we now know | |
2144 | * the port is an FCP Target. | |
2145 | * Note: we know the rport is exists and in an online | |
2146 | * state as the LLDD would not have had an rport | |
2147 | * reference to pass us. | |
2148 | * | |
2149 | * Take no action on the del_timer failure as the state | |
2150 | * machine state change will validate the | |
2151 | * transaction. | |
2152 | */ | |
2153 | if (!cancel_delayed_work(&rport->dev_loss_work)) | |
aedf3497 JS |
2154 | fc_flush_devloss(shost); |
2155 | ||
2156 | spin_lock_irqsave(shost->host_lock, flags); | |
2157 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
2158 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2159 | ||
2160 | /* ensure any stgt delete functions are done */ | |
2161 | fc_flush_work(shost); | |
19a7b4ae | 2162 | |
1da177e4 | 2163 | /* initiate a scan of the target */ |
aedf3497 JS |
2164 | spin_lock_irqsave(shost->host_lock, flags); |
2165 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
1da177e4 | 2166 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2167 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf | 2168 | scsi_target_unblock(&rport->dev); |
19a7b4ae | 2169 | } |
1da177e4 LT |
2170 | } |
2171 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
2172 | ||
2173 | /** | |
19a7b4ae JSEC |
2174 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that |
2175 | * was a SCSI target (thus was blocked), and failed | |
2176 | * to return in the alloted time. | |
2177 | * | |
2178 | * @data: rport target that failed to reappear in the alloted time. | |
1da177e4 LT |
2179 | **/ |
2180 | static void | |
19a7b4ae | 2181 | fc_timeout_deleted_rport(void *data) |
1da177e4 LT |
2182 | { |
2183 | struct fc_rport *rport = (struct fc_rport *)data; | |
19a7b4ae | 2184 | struct Scsi_Host *shost = rport_to_shost(rport); |
aedf3497 | 2185 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
19a7b4ae | 2186 | unsigned long flags; |
1da177e4 | 2187 | |
19a7b4ae | 2188 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 | 2189 | |
aedf3497 JS |
2190 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
2191 | ||
1da177e4 | 2192 | /* |
aedf3497 JS |
2193 | * If the port is ONLINE, then it came back. Validate it's still an |
2194 | * FCP target. If not, tear down the scsi_target on it. | |
1da177e4 | 2195 | */ |
aedf3497 JS |
2196 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
2197 | !(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { | |
19a7b4ae | 2198 | dev_printk(KERN_ERR, &rport->dev, |
aedf3497 JS |
2199 | "blocked FC remote port time out: no longer" |
2200 | " a FCP target, removing starget\n"); | |
aedf3497 | 2201 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf JS |
2202 | scsi_target_unblock(&rport->dev); |
2203 | fc_queue_work(shost, &rport->stgt_delete_work); | |
19a7b4ae JSEC |
2204 | return; |
2205 | } | |
1da177e4 | 2206 | |
19a7b4ae JSEC |
2207 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
2208 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2209 | dev_printk(KERN_ERR, &rport->dev, | |
2210 | "blocked FC remote port time out: leaving target alone\n"); | |
2211 | return; | |
2212 | } | |
1da177e4 | 2213 | |
aedf3497 JS |
2214 | if (fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) { |
2215 | list_del(&rport->peers); | |
2216 | rport->port_state = FC_PORTSTATE_DELETED; | |
19a7b4ae JSEC |
2217 | dev_printk(KERN_ERR, &rport->dev, |
2218 | "blocked FC remote port time out: removing target\n"); | |
aedf3497 JS |
2219 | fc_queue_work(shost, &rport->rport_delete_work); |
2220 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
2221 | return; |
2222 | } | |
1da177e4 | 2223 | |
19a7b4ae JSEC |
2224 | dev_printk(KERN_ERR, &rport->dev, |
2225 | "blocked FC remote port time out: removing target and " | |
2226 | "saving binding\n"); | |
2227 | ||
aedf3497 | 2228 | list_move_tail(&rport->peers, &fc_host->rport_bindings); |
1da177e4 LT |
2229 | |
2230 | /* | |
19a7b4ae JSEC |
2231 | * Note: We do not remove or clear the hostdata area. This allows |
2232 | * host-specific target data to persist along with the | |
2233 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 2234 | */ |
1da177e4 | 2235 | |
19a7b4ae JSEC |
2236 | /* |
2237 | * Reinitialize port attributes that may change if the port comes back. | |
2238 | */ | |
2239 | rport->maxframe_size = -1; | |
2240 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
2241 | rport->roles = FC_RPORT_ROLE_UNKNOWN; | |
aedf3497 | 2242 | rport->port_state = FC_PORTSTATE_NOTPRESENT; |
1da177e4 | 2243 | |
19a7b4ae | 2244 | /* remove the identifiers that aren't used in the consisting binding */ |
aedf3497 | 2245 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2246 | case FC_TGTID_BIND_BY_WWPN: |
2247 | rport->node_name = -1; | |
2248 | rport->port_id = -1; | |
2249 | break; | |
2250 | case FC_TGTID_BIND_BY_WWNN: | |
2251 | rport->port_name = -1; | |
2252 | rport->port_id = -1; | |
2253 | break; | |
2254 | case FC_TGTID_BIND_BY_ID: | |
2255 | rport->node_name = -1; | |
2256 | rport->port_name = -1; | |
2257 | break; | |
2258 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2259 | break; | |
2260 | } | |
2261 | ||
19a7b4ae JSEC |
2262 | /* |
2263 | * As this only occurs if the remote port (scsi target) | |
2264 | * went away and didn't come back - we'll remove | |
2265 | * all attached scsi devices. | |
2266 | */ | |
42e33148 | 2267 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf JS |
2268 | |
2269 | scsi_target_unblock(&rport->dev); | |
2270 | fc_queue_work(shost, &rport->stgt_delete_work); | |
1da177e4 | 2271 | } |
1da177e4 LT |
2272 | |
2273 | /** | |
2274 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
19a7b4ae | 2275 | * |
1da177e4 LT |
2276 | * @data: remote port to be scanned. |
2277 | **/ | |
2278 | static void | |
2279 | fc_scsi_scan_rport(void *data) | |
2280 | { | |
2281 | struct fc_rport *rport = (struct fc_rport *)data; | |
aedf3497 | 2282 | struct Scsi_Host *shost = rport_to_shost(rport); |
42e33148 JSEC |
2283 | unsigned long flags; |
2284 | ||
aedf3497 JS |
2285 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
2286 | (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { | |
aedf3497 JS |
2287 | scsi_scan_target(&rport->dev, rport->channel, |
2288 | rport->scsi_target_id, SCAN_WILD_CARD, 1); | |
42e33148 | 2289 | } |
aedf3497 JS |
2290 | |
2291 | spin_lock_irqsave(shost->host_lock, flags); | |
2292 | rport->flags &= ~FC_RPORT_SCAN_PENDING; | |
42e33148 JSEC |
2293 | spin_unlock_irqrestore(shost->host_lock, flags); |
2294 | } | |
2295 | ||
2296 | ||
1da177e4 LT |
2297 | MODULE_AUTHOR("Martin Hicks"); |
2298 | MODULE_DESCRIPTION("FC Transport Attributes"); | |
2299 | MODULE_LICENSE("GPL"); | |
2300 | ||
2301 | module_init(fc_transport_init); | |
2302 | module_exit(fc_transport_exit); |