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Commit | Line | Data |
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0896b752 | 1 | /* |
1da177e4 LT |
2 | * iSCSI transport class definitions |
3 | * | |
4 | * Copyright (C) IBM Corporation, 2004 | |
0896b752 AA |
5 | * Copyright (C) Mike Christie, 2004 - 2005 |
6 | * Copyright (C) Dmitry Yusupov, 2004 - 2005 | |
7 | * Copyright (C) Alex Aizman, 2004 - 2005 | |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | #include <linux/module.h> | |
0b950672 | 24 | #include <linux/mutex.h> |
0896b752 | 25 | #include <net/tcp.h> |
1da177e4 LT |
26 | #include <scsi/scsi.h> |
27 | #include <scsi/scsi_host.h> | |
28 | #include <scsi/scsi_device.h> | |
29 | #include <scsi/scsi_transport.h> | |
30 | #include <scsi/scsi_transport_iscsi.h> | |
0896b752 | 31 | #include <scsi/iscsi_if.h> |
1da177e4 | 32 | |
30a6c652 | 33 | #define ISCSI_SESSION_ATTRS 11 |
8d2860b3 | 34 | #define ISCSI_CONN_ATTRS 11 |
1819dc81 | 35 | #define ISCSI_HOST_ATTRS 1 |
82a0d7b5 | 36 | #define ISCSI_TRANSPORT_VERSION "2.0-724" |
1da177e4 LT |
37 | |
38 | struct iscsi_internal { | |
790f39a2 | 39 | int daemon_pid; |
1da177e4 | 40 | struct scsi_transport_template t; |
0896b752 AA |
41 | struct iscsi_transport *iscsi_transport; |
42 | struct list_head list; | |
0896b752 | 43 | struct class_device cdev; |
30a6c652 MC |
44 | |
45 | struct class_device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1]; | |
0896b752 AA |
46 | struct transport_container conn_cont; |
47 | struct class_device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1]; | |
48 | struct transport_container session_cont; | |
1da177e4 | 49 | struct class_device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1]; |
1da177e4 LT |
50 | }; |
51 | ||
41be1444 | 52 | static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ |
b5c7a12d | 53 | |
0896b752 AA |
54 | /* |
55 | * list of registered transports and lock that must | |
56 | * be held while accessing list. The iscsi_transport_lock must | |
0b950672 | 57 | * be acquired after the rx_queue_mutex. |
0896b752 AA |
58 | */ |
59 | static LIST_HEAD(iscsi_transports); | |
60 | static DEFINE_SPINLOCK(iscsi_transport_lock); | |
61 | ||
62 | #define to_iscsi_internal(tmpl) \ | |
63 | container_of(tmpl, struct iscsi_internal, t) | |
64 | ||
65 | #define cdev_to_iscsi_internal(_cdev) \ | |
66 | container_of(_cdev, struct iscsi_internal, cdev) | |
67 | ||
68 | static void iscsi_transport_release(struct class_device *cdev) | |
69 | { | |
70 | struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); | |
71 | kfree(priv); | |
72 | } | |
1da177e4 | 73 | |
0896b752 AA |
74 | /* |
75 | * iscsi_transport_class represents the iscsi_transports that are | |
76 | * registered. | |
77 | */ | |
78 | static struct class iscsi_transport_class = { | |
79 | .name = "iscsi_transport", | |
80 | .release = iscsi_transport_release, | |
81 | }; | |
82 | ||
83 | static ssize_t | |
84 | show_transport_handle(struct class_device *cdev, char *buf) | |
85 | { | |
86 | struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); | |
762e2bfa | 87 | return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); |
0896b752 AA |
88 | } |
89 | static CLASS_DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); | |
90 | ||
91 | #define show_transport_attr(name, format) \ | |
92 | static ssize_t \ | |
93 | show_transport_##name(struct class_device *cdev, char *buf) \ | |
94 | { \ | |
95 | struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); \ | |
96 | return sprintf(buf, format"\n", priv->iscsi_transport->name); \ | |
97 | } \ | |
98 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); | |
99 | ||
100 | show_transport_attr(caps, "0x%x"); | |
101 | show_transport_attr(max_lun, "%d"); | |
102 | show_transport_attr(max_conn, "%d"); | |
103 | show_transport_attr(max_cmd_len, "%d"); | |
104 | ||
105 | static struct attribute *iscsi_transport_attrs[] = { | |
106 | &class_device_attr_handle.attr, | |
107 | &class_device_attr_caps.attr, | |
108 | &class_device_attr_max_lun.attr, | |
109 | &class_device_attr_max_conn.attr, | |
110 | &class_device_attr_max_cmd_len.attr, | |
111 | NULL, | |
112 | }; | |
113 | ||
114 | static struct attribute_group iscsi_transport_group = { | |
115 | .attrs = iscsi_transport_attrs, | |
116 | }; | |
117 | ||
30a6c652 MC |
118 | static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
119 | struct class_device *cdev) | |
120 | { | |
121 | struct Scsi_Host *shost = dev_to_shost(dev); | |
122 | struct iscsi_host *ihost = shost->shost_data; | |
123 | ||
124 | memset(ihost, 0, sizeof(*ihost)); | |
125 | INIT_LIST_HEAD(&ihost->sessions); | |
126 | mutex_init(&ihost->mutex); | |
127 | return 0; | |
128 | } | |
129 | ||
130 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
131 | "iscsi_host", | |
132 | iscsi_setup_host, | |
133 | NULL, | |
134 | NULL); | |
135 | ||
0896b752 AA |
136 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
137 | "iscsi_session", | |
1da177e4 LT |
138 | NULL, |
139 | NULL, | |
140 | NULL); | |
141 | ||
0896b752 AA |
142 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
143 | "iscsi_connection", | |
1da177e4 LT |
144 | NULL, |
145 | NULL, | |
146 | NULL); | |
0896b752 AA |
147 | |
148 | static struct sock *nls; | |
0b950672 | 149 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 150 | |
7b7232f3 MC |
151 | static LIST_HEAD(sesslist); |
152 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
153 | static LIST_HEAD(connlist); |
154 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 155 | |
b5c7a12d MC |
156 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
157 | { | |
158 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
159 | return sess->sid; | |
160 | } | |
161 | ||
162 | /* | |
163 | * Returns the matching session to a given sid | |
164 | */ | |
165 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
166 | { |
167 | unsigned long flags; | |
168 | struct iscsi_cls_session *sess; | |
169 | ||
170 | spin_lock_irqsave(&sesslock, flags); | |
171 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 172 | if (sess->sid == sid) { |
7b7232f3 MC |
173 | spin_unlock_irqrestore(&sesslock, flags); |
174 | return sess; | |
175 | } | |
176 | } | |
177 | spin_unlock_irqrestore(&sesslock, flags); | |
178 | return NULL; | |
179 | } | |
180 | ||
b5c7a12d MC |
181 | /* |
182 | * Returns the matching connection to a given sid / cid tuple | |
183 | */ | |
184 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
185 | { |
186 | unsigned long flags; | |
187 | struct iscsi_cls_conn *conn; | |
188 | ||
189 | spin_lock_irqsave(&connlock, flags); | |
190 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 191 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
192 | spin_unlock_irqrestore(&connlock, flags); |
193 | return conn; | |
194 | } | |
195 | } | |
196 | spin_unlock_irqrestore(&connlock, flags); | |
197 | return NULL; | |
198 | } | |
199 | ||
7b8631b5 MC |
200 | /* |
201 | * The following functions can be used by LLDs that allocate | |
202 | * their own scsi_hosts or by software iscsi LLDs | |
203 | */ | |
204 | static void iscsi_session_release(struct device *dev) | |
205 | { | |
206 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 207 | struct Scsi_Host *shost; |
0896b752 | 208 | |
7b8631b5 MC |
209 | shost = iscsi_session_to_shost(session); |
210 | scsi_host_put(shost); | |
211 | kfree(session); | |
7b8631b5 | 212 | } |
0896b752 | 213 | |
7b8631b5 MC |
214 | static int iscsi_is_session_dev(const struct device *dev) |
215 | { | |
216 | return dev->release == iscsi_session_release; | |
217 | } | |
0896b752 | 218 | |
30a6c652 MC |
219 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
220 | uint id, uint lun) | |
221 | { | |
222 | struct iscsi_host *ihost = shost->shost_data; | |
223 | struct iscsi_cls_session *session; | |
224 | ||
225 | mutex_lock(&ihost->mutex); | |
226 | list_for_each_entry(session, &ihost->sessions, host_list) { | |
e6f3b63f | 227 | if ((channel == SCAN_WILD_CARD || channel == 0) && |
30a6c652 | 228 | (id == SCAN_WILD_CARD || id == session->target_id)) |
e6f3b63f | 229 | scsi_scan_target(&session->dev, 0, |
30a6c652 MC |
230 | session->target_id, lun, 1); |
231 | } | |
232 | mutex_unlock(&ihost->mutex); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
c4028958 | 237 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 238 | { |
c4028958 DH |
239 | struct iscsi_cls_session *session = |
240 | container_of(work, struct iscsi_cls_session, | |
241 | recovery_work.work); | |
30a6c652 | 242 | |
be2df72e OG |
243 | dev_printk(KERN_INFO, &session->dev, "iscsi: session recovery timed " |
244 | "out after %d secs\n", session->recovery_tmo); | |
30a6c652 MC |
245 | |
246 | if (session->transport->session_recovery_timedout) | |
247 | session->transport->session_recovery_timedout(session); | |
248 | ||
249 | scsi_target_unblock(&session->dev); | |
250 | } | |
251 | ||
252 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
253 | { | |
254 | if (!cancel_delayed_work(&session->recovery_work)) | |
255 | flush_scheduled_work(); | |
256 | scsi_target_unblock(&session->dev); | |
257 | } | |
258 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); | |
259 | ||
260 | void iscsi_block_session(struct iscsi_cls_session *session) | |
261 | { | |
262 | scsi_target_block(&session->dev); | |
263 | schedule_delayed_work(&session->recovery_work, | |
264 | session->recovery_tmo * HZ); | |
265 | } | |
266 | EXPORT_SYMBOL_GPL(iscsi_block_session); | |
267 | ||
7b8631b5 | 268 | struct iscsi_cls_session * |
8434aa8b MC |
269 | iscsi_alloc_session(struct Scsi_Host *shost, |
270 | struct iscsi_transport *transport) | |
7b8631b5 MC |
271 | { |
272 | struct iscsi_cls_session *session; | |
7b8631b5 | 273 | |
b5c7a12d MC |
274 | session = kzalloc(sizeof(*session) + transport->sessiondata_size, |
275 | GFP_KERNEL); | |
7b8631b5 | 276 | if (!session) |
f53a88da MC |
277 | return NULL; |
278 | ||
7b8631b5 | 279 | session->transport = transport; |
30a6c652 | 280 | session->recovery_tmo = 120; |
c4028958 | 281 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 MC |
282 | INIT_LIST_HEAD(&session->host_list); |
283 | INIT_LIST_HEAD(&session->sess_list); | |
7b8631b5 | 284 | |
6a8a0d36 MC |
285 | /* this is released in the dev's release function */ |
286 | scsi_host_get(shost); | |
8434aa8b MC |
287 | session->dev.parent = &shost->shost_gendev; |
288 | session->dev.release = iscsi_session_release; | |
289 | device_initialize(&session->dev); | |
b5c7a12d MC |
290 | if (transport->sessiondata_size) |
291 | session->dd_data = &session[1]; | |
8434aa8b MC |
292 | return session; |
293 | } | |
294 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
295 | ||
6a8a0d36 | 296 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
297 | { |
298 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
299 | struct iscsi_host *ihost; | |
300 | int err; | |
b5c7a12d | 301 | |
30a6c652 | 302 | ihost = shost->shost_data; |
41be1444 | 303 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
6a8a0d36 | 304 | session->target_id = target_id; |
30a6c652 | 305 | |
b5c7a12d MC |
306 | snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", |
307 | session->sid); | |
8434aa8b | 308 | err = device_add(&session->dev); |
7b8631b5 MC |
309 | if (err) { |
310 | dev_printk(KERN_ERR, &session->dev, "iscsi: could not " | |
311 | "register session's dev\n"); | |
8434aa8b | 312 | goto release_host; |
7b8631b5 MC |
313 | } |
314 | transport_register_device(&session->dev); | |
315 | ||
30a6c652 MC |
316 | mutex_lock(&ihost->mutex); |
317 | list_add(&session->host_list, &ihost->sessions); | |
318 | mutex_unlock(&ihost->mutex); | |
8434aa8b | 319 | return 0; |
30a6c652 | 320 | |
8434aa8b MC |
321 | release_host: |
322 | scsi_host_put(shost); | |
323 | return err; | |
7b8631b5 | 324 | } |
8434aa8b | 325 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
326 | |
327 | /** | |
8434aa8b MC |
328 | * iscsi_create_session - create iscsi class session |
329 | * @shost: scsi host | |
330 | * @transport: iscsi transport | |
7b8631b5 | 331 | * |
8434aa8b | 332 | * This can be called from a LLD or iscsi_transport. |
7b8631b5 | 333 | **/ |
8434aa8b MC |
334 | struct iscsi_cls_session * |
335 | iscsi_create_session(struct Scsi_Host *shost, | |
6a8a0d36 MC |
336 | struct iscsi_transport *transport, |
337 | unsigned int target_id) | |
8434aa8b MC |
338 | { |
339 | struct iscsi_cls_session *session; | |
340 | ||
341 | session = iscsi_alloc_session(shost, transport); | |
342 | if (!session) | |
343 | return NULL; | |
344 | ||
6a8a0d36 | 345 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
346 | iscsi_free_session(session); |
347 | return NULL; | |
348 | } | |
349 | return session; | |
350 | } | |
351 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
352 | ||
353 | void iscsi_remove_session(struct iscsi_cls_session *session) | |
7b8631b5 | 354 | { |
30a6c652 MC |
355 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
356 | struct iscsi_host *ihost = shost->shost_data; | |
357 | ||
358 | if (!cancel_delayed_work(&session->recovery_work)) | |
359 | flush_scheduled_work(); | |
360 | ||
361 | mutex_lock(&ihost->mutex); | |
362 | list_del(&session->host_list); | |
363 | mutex_unlock(&ihost->mutex); | |
364 | ||
8434aa8b MC |
365 | scsi_remove_target(&session->dev); |
366 | ||
7b8631b5 | 367 | transport_unregister_device(&session->dev); |
8434aa8b MC |
368 | device_del(&session->dev); |
369 | } | |
370 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
371 | ||
372 | void iscsi_free_session(struct iscsi_cls_session *session) | |
373 | { | |
374 | put_device(&session->dev); | |
7b8631b5 MC |
375 | } |
376 | ||
8434aa8b MC |
377 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
378 | ||
379 | /** | |
380 | * iscsi_destroy_session - destroy iscsi session | |
381 | * @session: iscsi_session | |
382 | * | |
383 | * Can be called by a LLD or iscsi_transport. There must not be | |
384 | * any running connections. | |
385 | **/ | |
386 | int iscsi_destroy_session(struct iscsi_cls_session *session) | |
387 | { | |
388 | iscsi_remove_session(session); | |
389 | iscsi_free_session(session); | |
390 | return 0; | |
391 | } | |
7b8631b5 MC |
392 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
393 | ||
394 | static void iscsi_conn_release(struct device *dev) | |
395 | { | |
396 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
397 | struct device *parent = conn->dev.parent; | |
398 | ||
399 | kfree(conn); | |
400 | put_device(parent); | |
401 | } | |
402 | ||
403 | static int iscsi_is_conn_dev(const struct device *dev) | |
404 | { | |
405 | return dev->release == iscsi_conn_release; | |
406 | } | |
407 | ||
408 | /** | |
409 | * iscsi_create_conn - create iscsi class connection | |
410 | * @session: iscsi cls session | |
411 | * @cid: connection id | |
412 | * | |
413 | * This can be called from a LLD or iscsi_transport. The connection | |
414 | * is child of the session so cid must be unique for all connections | |
415 | * on the session. | |
b5c7a12d MC |
416 | * |
417 | * Since we do not support MCS, cid will normally be zero. In some cases | |
418 | * for software iscsi we could be trying to preallocate a connection struct | |
419 | * in which case there could be two connection structs and cid would be | |
420 | * non-zero. | |
7b8631b5 MC |
421 | **/ |
422 | struct iscsi_cls_conn * | |
423 | iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid) | |
424 | { | |
425 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 MC |
426 | struct iscsi_cls_conn *conn; |
427 | int err; | |
428 | ||
429 | conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL); | |
430 | if (!conn) | |
431 | return NULL; | |
432 | ||
433 | if (transport->conndata_size) | |
434 | conn->dd_data = &conn[1]; | |
435 | ||
436 | INIT_LIST_HEAD(&conn->conn_list); | |
437 | conn->transport = transport; | |
b5c7a12d | 438 | conn->cid = cid; |
7b8631b5 MC |
439 | |
440 | /* this is released in the dev's release function */ | |
441 | if (!get_device(&session->dev)) | |
43a145a3 | 442 | goto free_conn; |
b5c7a12d | 443 | |
7b8631b5 | 444 | snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u", |
b5c7a12d | 445 | session->sid, cid); |
7b8631b5 MC |
446 | conn->dev.parent = &session->dev; |
447 | conn->dev.release = iscsi_conn_release; | |
448 | err = device_register(&conn->dev); | |
449 | if (err) { | |
450 | dev_printk(KERN_ERR, &conn->dev, "iscsi: could not register " | |
451 | "connection's dev\n"); | |
452 | goto release_parent_ref; | |
453 | } | |
454 | transport_register_device(&conn->dev); | |
455 | return conn; | |
456 | ||
457 | release_parent_ref: | |
458 | put_device(&session->dev); | |
459 | free_conn: | |
460 | kfree(conn); | |
461 | return NULL; | |
462 | } | |
463 | ||
464 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
465 | ||
466 | /** | |
467 | * iscsi_destroy_conn - destroy iscsi class connection | |
468 | * @session: iscsi cls session | |
469 | * | |
470 | * This can be called from a LLD or iscsi_transport. | |
471 | **/ | |
472 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) | |
473 | { | |
474 | transport_unregister_device(&conn->dev); | |
475 | device_unregister(&conn->dev); | |
476 | return 0; | |
477 | } | |
478 | ||
479 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); | |
480 | ||
7b8631b5 MC |
481 | /* |
482 | * iscsi interface functions | |
483 | */ | |
0896b752 AA |
484 | static struct iscsi_internal * |
485 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
486 | { | |
487 | struct iscsi_internal *priv; | |
488 | unsigned long flags; | |
489 | ||
490 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
491 | list_for_each_entry(priv, &iscsi_transports, list) { | |
492 | if (tt == priv->iscsi_transport) { | |
493 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
494 | return priv; | |
495 | } | |
496 | } | |
497 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
498 | return NULL; | |
499 | } | |
1da177e4 | 500 | |
53cb8a1f | 501 | static int |
43a145a3 | 502 | iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp) |
53cb8a1f | 503 | { |
53cb8a1f MC |
504 | int rc; |
505 | ||
9aaa2b46 | 506 | rc = netlink_broadcast(nls, skb, 0, 1, gfp); |
53cb8a1f | 507 | if (rc < 0) { |
53cb8a1f MC |
508 | printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc); |
509 | return rc; | |
510 | } | |
511 | ||
53cb8a1f MC |
512 | return 0; |
513 | } | |
514 | ||
0896b752 | 515 | static int |
43a145a3 | 516 | iscsi_unicast_skb(struct sk_buff *skb, int pid) |
0896b752 | 517 | { |
0896b752 | 518 | int rc; |
1da177e4 | 519 | |
790f39a2 | 520 | rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT); |
0896b752 | 521 | if (rc < 0) { |
0896b752 AA |
522 | printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc); |
523 | return rc; | |
524 | } | |
525 | ||
0896b752 | 526 | return 0; |
1da177e4 | 527 | } |
1da177e4 | 528 | |
7b7232f3 | 529 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 530 | char *data, uint32_t data_size) |
1da177e4 | 531 | { |
0896b752 AA |
532 | struct nlmsghdr *nlh; |
533 | struct sk_buff *skb; | |
534 | struct iscsi_uevent *ev; | |
0896b752 | 535 | char *pdu; |
790f39a2 | 536 | struct iscsi_internal *priv; |
0896b752 AA |
537 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
538 | data_size); | |
539 | ||
790f39a2 MC |
540 | priv = iscsi_if_transport_lookup(conn->transport); |
541 | if (!priv) | |
542 | return -EINVAL; | |
543 | ||
43a145a3 | 544 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 545 | if (!skb) { |
7b7232f3 | 546 | iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED); |
7b8631b5 MC |
547 | dev_printk(KERN_ERR, &conn->dev, "iscsi: can not deliver " |
548 | "control PDU: OOM\n"); | |
0896b752 AA |
549 | return -ENOMEM; |
550 | } | |
1da177e4 | 551 | |
790f39a2 | 552 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
553 | ev = NLMSG_DATA(nlh); |
554 | memset(ev, 0, sizeof(*ev)); | |
555 | ev->transport_handle = iscsi_handle(conn->transport); | |
556 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
557 | ev->r.recv_req.cid = conn->cid; |
558 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
559 | pdu = (char*)ev + sizeof(*ev); |
560 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
561 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 562 | |
43a145a3 | 563 | return iscsi_unicast_skb(skb, priv->daemon_pid); |
1da177e4 | 564 | } |
0896b752 | 565 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 566 | |
7b7232f3 | 567 | void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 568 | { |
0896b752 AA |
569 | struct nlmsghdr *nlh; |
570 | struct sk_buff *skb; | |
571 | struct iscsi_uevent *ev; | |
790f39a2 | 572 | struct iscsi_internal *priv; |
0896b752 AA |
573 | int len = NLMSG_SPACE(sizeof(*ev)); |
574 | ||
790f39a2 MC |
575 | priv = iscsi_if_transport_lookup(conn->transport); |
576 | if (!priv) | |
577 | return; | |
578 | ||
43a145a3 | 579 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 580 | if (!skb) { |
7b8631b5 MC |
581 | dev_printk(KERN_ERR, &conn->dev, "iscsi: gracefully ignored " |
582 | "conn error (%d)\n", error); | |
0896b752 AA |
583 | return; |
584 | } | |
585 | ||
790f39a2 | 586 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
587 | ev = NLMSG_DATA(nlh); |
588 | ev->transport_handle = iscsi_handle(conn->transport); | |
589 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 590 | ev->r.connerror.error = error; |
b5c7a12d MC |
591 | ev->r.connerror.cid = conn->cid; |
592 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 593 | |
43a145a3 | 594 | iscsi_broadcast_skb(skb, GFP_ATOMIC); |
1da177e4 | 595 | |
7b8631b5 MC |
596 | dev_printk(KERN_INFO, &conn->dev, "iscsi: detected conn error (%d)\n", |
597 | error); | |
0896b752 AA |
598 | } |
599 | EXPORT_SYMBOL_GPL(iscsi_conn_error); | |
600 | ||
601 | static int | |
602 | iscsi_if_send_reply(int pid, int seq, int type, int done, int multi, | |
603 | void *payload, int size) | |
604 | { | |
605 | struct sk_buff *skb; | |
606 | struct nlmsghdr *nlh; | |
607 | int len = NLMSG_SPACE(size); | |
608 | int flags = multi ? NLM_F_MULTI : 0; | |
609 | int t = done ? NLMSG_DONE : type; | |
610 | ||
43a145a3 | 611 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
612 | if (!skb) { |
613 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
614 | return -ENOMEM; | |
615 | } | |
0896b752 AA |
616 | |
617 | nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0); | |
618 | nlh->nlmsg_flags = flags; | |
619 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43a145a3 | 620 | return iscsi_unicast_skb(skb, pid); |
1da177e4 | 621 | } |
1da177e4 | 622 | |
7b8631b5 | 623 | static int |
5b940adf | 624 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
625 | { |
626 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
627 | struct iscsi_stats *stats; | |
628 | struct sk_buff *skbstat; | |
629 | struct iscsi_cls_conn *conn; | |
630 | struct nlmsghdr *nlhstat; | |
631 | struct iscsi_uevent *evstat; | |
790f39a2 | 632 | struct iscsi_internal *priv; |
7b8631b5 MC |
633 | int len = NLMSG_SPACE(sizeof(*ev) + |
634 | sizeof(struct iscsi_stats) + | |
635 | sizeof(struct iscsi_stats_custom) * | |
636 | ISCSI_STATS_CUSTOM_MAX); | |
637 | int err = 0; | |
0896b752 | 638 | |
790f39a2 MC |
639 | priv = iscsi_if_transport_lookup(transport); |
640 | if (!priv) | |
641 | return -EINVAL; | |
642 | ||
b5c7a12d | 643 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
644 | if (!conn) |
645 | return -EEXIST; | |
0896b752 | 646 | |
7b8631b5 MC |
647 | do { |
648 | int actual_size; | |
0896b752 | 649 | |
43a145a3 | 650 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 MC |
651 | if (!skbstat) { |
652 | dev_printk(KERN_ERR, &conn->dev, "iscsi: can not " | |
653 | "deliver stats: OOM\n"); | |
654 | return -ENOMEM; | |
655 | } | |
656 | ||
790f39a2 | 657 | nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0, |
7b8631b5 MC |
658 | (len - sizeof(*nlhstat)), 0); |
659 | evstat = NLMSG_DATA(nlhstat); | |
660 | memset(evstat, 0, sizeof(*evstat)); | |
661 | evstat->transport_handle = iscsi_handle(conn->transport); | |
662 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
663 | evstat->u.get_stats.cid = |
664 | ev->u.get_stats.cid; | |
665 | evstat->u.get_stats.sid = | |
666 | ev->u.get_stats.sid; | |
7b8631b5 MC |
667 | stats = (struct iscsi_stats *) |
668 | ((char*)evstat + sizeof(*evstat)); | |
669 | memset(stats, 0, sizeof(*stats)); | |
670 | ||
7b7232f3 | 671 | transport->get_stats(conn, stats); |
7b8631b5 MC |
672 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
673 | sizeof(struct iscsi_stats) + | |
674 | sizeof(struct iscsi_stats_custom) * | |
675 | stats->custom_length); | |
676 | actual_size -= sizeof(*nlhstat); | |
677 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 678 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
679 | nlhstat->nlmsg_len = actual_size; |
680 | ||
43a145a3 | 681 | err = iscsi_unicast_skb(skbstat, priv->daemon_pid); |
7b8631b5 MC |
682 | } while (err < 0 && err != -ECONNREFUSED); |
683 | ||
684 | return err; | |
0896b752 AA |
685 | } |
686 | ||
53cb8a1f MC |
687 | /** |
688 | * iscsi_if_destroy_session_done - send session destr. completion event | |
689 | * @conn: last connection for session | |
690 | * | |
691 | * This is called by HW iscsi LLDs to notify userpsace that its HW has | |
692 | * removed a session. | |
693 | **/ | |
694 | int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn) | |
695 | { | |
696 | struct iscsi_internal *priv; | |
697 | struct iscsi_cls_session *session; | |
698 | struct Scsi_Host *shost; | |
699 | struct iscsi_uevent *ev; | |
700 | struct sk_buff *skb; | |
701 | struct nlmsghdr *nlh; | |
702 | unsigned long flags; | |
703 | int rc, len = NLMSG_SPACE(sizeof(*ev)); | |
704 | ||
705 | priv = iscsi_if_transport_lookup(conn->transport); | |
706 | if (!priv) | |
707 | return -EINVAL; | |
708 | ||
709 | session = iscsi_dev_to_session(conn->dev.parent); | |
710 | shost = iscsi_session_to_shost(session); | |
711 | ||
43a145a3 | 712 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f MC |
713 | if (!skb) { |
714 | dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " | |
715 | "session creation event\n"); | |
716 | return -ENOMEM; | |
717 | } | |
718 | ||
719 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
720 | ev = NLMSG_DATA(nlh); | |
721 | ev->transport_handle = iscsi_handle(conn->transport); | |
722 | ev->type = ISCSI_KEVENT_DESTROY_SESSION; | |
723 | ev->r.d_session.host_no = shost->host_no; | |
724 | ev->r.d_session.sid = session->sid; | |
725 | ||
726 | /* | |
727 | * this will occur if the daemon is not up, so we just warn | |
728 | * the user and when the daemon is restarted it will handle it | |
729 | */ | |
43a145a3 | 730 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
53cb8a1f MC |
731 | if (rc < 0) |
732 | dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " | |
733 | "session destruction event. Check iscsi daemon\n"); | |
734 | ||
735 | spin_lock_irqsave(&sesslock, flags); | |
736 | list_del(&session->sess_list); | |
737 | spin_unlock_irqrestore(&sesslock, flags); | |
738 | ||
739 | spin_lock_irqsave(&connlock, flags); | |
740 | conn->active = 0; | |
741 | list_del(&conn->conn_list); | |
742 | spin_unlock_irqrestore(&connlock, flags); | |
743 | ||
744 | return rc; | |
745 | } | |
746 | EXPORT_SYMBOL_GPL(iscsi_if_destroy_session_done); | |
747 | ||
748 | /** | |
749 | * iscsi_if_create_session_done - send session creation completion event | |
750 | * @conn: leading connection for session | |
751 | * | |
752 | * This is called by HW iscsi LLDs to notify userpsace that its HW has | |
753 | * created a session or a existing session is back in the logged in state. | |
754 | **/ | |
755 | int iscsi_if_create_session_done(struct iscsi_cls_conn *conn) | |
756 | { | |
757 | struct iscsi_internal *priv; | |
758 | struct iscsi_cls_session *session; | |
759 | struct Scsi_Host *shost; | |
760 | struct iscsi_uevent *ev; | |
761 | struct sk_buff *skb; | |
762 | struct nlmsghdr *nlh; | |
763 | unsigned long flags; | |
764 | int rc, len = NLMSG_SPACE(sizeof(*ev)); | |
765 | ||
766 | priv = iscsi_if_transport_lookup(conn->transport); | |
767 | if (!priv) | |
768 | return -EINVAL; | |
769 | ||
770 | session = iscsi_dev_to_session(conn->dev.parent); | |
771 | shost = iscsi_session_to_shost(session); | |
772 | ||
43a145a3 | 773 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f MC |
774 | if (!skb) { |
775 | dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " | |
776 | "session creation event\n"); | |
777 | return -ENOMEM; | |
778 | } | |
779 | ||
780 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
781 | ev = NLMSG_DATA(nlh); | |
782 | ev->transport_handle = iscsi_handle(conn->transport); | |
783 | ev->type = ISCSI_UEVENT_CREATE_SESSION; | |
784 | ev->r.c_session_ret.host_no = shost->host_no; | |
785 | ev->r.c_session_ret.sid = session->sid; | |
786 | ||
787 | /* | |
788 | * this will occur if the daemon is not up, so we just warn | |
789 | * the user and when the daemon is restarted it will handle it | |
790 | */ | |
43a145a3 | 791 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
53cb8a1f MC |
792 | if (rc < 0) |
793 | dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " | |
794 | "session creation event. Check iscsi daemon\n"); | |
795 | ||
796 | spin_lock_irqsave(&sesslock, flags); | |
797 | list_add(&session->sess_list, &sesslist); | |
798 | spin_unlock_irqrestore(&sesslock, flags); | |
799 | ||
800 | spin_lock_irqsave(&connlock, flags); | |
801 | list_add(&conn->conn_list, &connlist); | |
802 | conn->active = 1; | |
803 | spin_unlock_irqrestore(&connlock, flags); | |
804 | return rc; | |
805 | } | |
806 | EXPORT_SYMBOL_GPL(iscsi_if_create_session_done); | |
807 | ||
0896b752 AA |
808 | static int |
809 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev) | |
810 | { | |
811 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 812 | struct iscsi_cls_session *session; |
7996a778 | 813 | unsigned long flags; |
b5c7a12d | 814 | uint32_t hostno; |
0896b752 | 815 | |
7996a778 | 816 | session = transport->create_session(transport, &priv->t, |
7b7232f3 | 817 | ev->u.c_session.initial_cmdsn, |
b5c7a12d | 818 | &hostno); |
7b7232f3 | 819 | if (!session) |
7b8631b5 | 820 | return -ENOMEM; |
0896b752 | 821 | |
7996a778 MC |
822 | spin_lock_irqsave(&sesslock, flags); |
823 | list_add(&session->sess_list, &sesslist); | |
824 | spin_unlock_irqrestore(&sesslock, flags); | |
825 | ||
b5c7a12d MC |
826 | ev->r.c_session_ret.host_no = hostno; |
827 | ev->r.c_session_ret.sid = session->sid; | |
0896b752 | 828 | return 0; |
0896b752 AA |
829 | } |
830 | ||
831 | static int | |
7b7232f3 | 832 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 833 | { |
7b8631b5 | 834 | struct iscsi_cls_conn *conn; |
7b7232f3 | 835 | struct iscsi_cls_session *session; |
0896b752 | 836 | unsigned long flags; |
7b8631b5 | 837 | |
b5c7a12d MC |
838 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
839 | if (!session) { | |
840 | printk(KERN_ERR "iscsi: invalid session %d\n", | |
841 | ev->u.c_conn.sid); | |
7b8631b5 | 842 | return -EINVAL; |
b5c7a12d | 843 | } |
0896b752 | 844 | |
7b7232f3 | 845 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d MC |
846 | if (!conn) { |
847 | printk(KERN_ERR "iscsi: couldn't create a new " | |
848 | "connection for session %d\n", | |
849 | session->sid); | |
7b7232f3 | 850 | return -ENOMEM; |
b5c7a12d | 851 | } |
0896b752 | 852 | |
b5c7a12d MC |
853 | ev->r.c_conn_ret.sid = session->sid; |
854 | ev->r.c_conn_ret.cid = conn->cid; | |
0896b752 AA |
855 | |
856 | spin_lock_irqsave(&connlock, flags); | |
857 | list_add(&conn->conn_list, &connlist); | |
0896b752 AA |
858 | conn->active = 1; |
859 | spin_unlock_irqrestore(&connlock, flags); | |
860 | ||
0896b752 | 861 | return 0; |
1da177e4 LT |
862 | } |
863 | ||
0896b752 AA |
864 | static int |
865 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
866 | { | |
867 | unsigned long flags; | |
7b8631b5 | 868 | struct iscsi_cls_conn *conn; |
0896b752 | 869 | |
b5c7a12d | 870 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 871 | if (!conn) |
7b8631b5 | 872 | return -EINVAL; |
0896b752 AA |
873 | spin_lock_irqsave(&connlock, flags); |
874 | conn->active = 0; | |
875 | list_del(&conn->conn_list); | |
876 | spin_unlock_irqrestore(&connlock, flags); | |
877 | ||
7b8631b5 MC |
878 | if (transport->destroy_conn) |
879 | transport->destroy_conn(conn); | |
7b8631b5 | 880 | return 0; |
0896b752 AA |
881 | } |
882 | ||
fd7255f5 MC |
883 | static int |
884 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
885 | { | |
886 | char *data = (char*)ev + sizeof(*ev); | |
887 | struct iscsi_cls_conn *conn; | |
888 | struct iscsi_cls_session *session; | |
a54a52ca | 889 | int err = 0, value = 0; |
fd7255f5 MC |
890 | |
891 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
892 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
893 | if (!conn || !session) | |
894 | return -EINVAL; | |
895 | ||
896 | switch (ev->u.set_param.param) { | |
30a6c652 | 897 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 898 | sscanf(data, "%d", &value); |
30a6c652 MC |
899 | if (value != 0) |
900 | session->recovery_tmo = value; | |
901 | break; | |
fd7255f5 | 902 | default: |
a54a52ca MC |
903 | err = transport->set_param(conn, ev->u.set_param.param, |
904 | data, ev->u.set_param.len); | |
fd7255f5 MC |
905 | } |
906 | ||
907 | return err; | |
908 | } | |
909 | ||
264faaaa OG |
910 | static int |
911 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
912 | struct iscsi_uevent *ev, int msg_type) | |
913 | { | |
914 | struct sockaddr *dst_addr; | |
915 | int rc = 0; | |
916 | ||
917 | switch (msg_type) { | |
918 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: | |
919 | if (!transport->ep_connect) | |
920 | return -EINVAL; | |
921 | ||
922 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
923 | rc = transport->ep_connect(dst_addr, | |
924 | ev->u.ep_connect.non_blocking, | |
925 | &ev->r.ep_connect_ret.handle); | |
926 | break; | |
927 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
928 | if (!transport->ep_poll) | |
929 | return -EINVAL; | |
930 | ||
931 | ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle, | |
932 | ev->u.ep_poll.timeout_ms); | |
933 | break; | |
934 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
935 | if (!transport->ep_disconnect) | |
936 | return -EINVAL; | |
937 | ||
938 | transport->ep_disconnect(ev->u.ep_disconnect.ep_handle); | |
939 | break; | |
940 | } | |
941 | return rc; | |
942 | } | |
943 | ||
01cb225d MC |
944 | static int |
945 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
946 | struct iscsi_uevent *ev) | |
947 | { | |
2174a04e | 948 | struct Scsi_Host *shost; |
01cb225d | 949 | struct sockaddr *dst_addr; |
2174a04e | 950 | int err; |
01cb225d MC |
951 | |
952 | if (!transport->tgt_dscvr) | |
953 | return -EINVAL; | |
954 | ||
2174a04e MC |
955 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
956 | if (IS_ERR(shost)) { | |
957 | printk(KERN_ERR "target discovery could not find host no %u\n", | |
958 | ev->u.tgt_dscvr.host_no); | |
959 | return -ENODEV; | |
960 | } | |
961 | ||
962 | ||
01cb225d | 963 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
964 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
965 | ev->u.tgt_dscvr.enable, dst_addr); | |
966 | scsi_host_put(shost); | |
967 | return err; | |
01cb225d MC |
968 | } |
969 | ||
0896b752 AA |
970 | static int |
971 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) | |
972 | { | |
973 | int err = 0; | |
974 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
975 | struct iscsi_transport *transport = NULL; | |
976 | struct iscsi_internal *priv; | |
7b7232f3 MC |
977 | struct iscsi_cls_session *session; |
978 | struct iscsi_cls_conn *conn; | |
7996a778 | 979 | unsigned long flags; |
0896b752 | 980 | |
0896b752 AA |
981 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
982 | if (!priv) | |
983 | return -EINVAL; | |
984 | transport = priv->iscsi_transport; | |
985 | ||
7b7232f3 MC |
986 | if (!try_module_get(transport->owner)) |
987 | return -EINVAL; | |
988 | ||
790f39a2 MC |
989 | priv->daemon_pid = NETLINK_CREDS(skb)->pid; |
990 | ||
0896b752 AA |
991 | switch (nlh->nlmsg_type) { |
992 | case ISCSI_UEVENT_CREATE_SESSION: | |
993 | err = iscsi_if_create_session(priv, ev); | |
994 | break; | |
995 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 996 | session = iscsi_session_lookup(ev->u.d_session.sid); |
7996a778 MC |
997 | if (session) { |
998 | spin_lock_irqsave(&sesslock, flags); | |
999 | list_del(&session->sess_list); | |
1000 | spin_unlock_irqrestore(&sesslock, flags); | |
1001 | ||
7b7232f3 | 1002 | transport->destroy_session(session); |
7996a778 | 1003 | } else |
7b7232f3 | 1004 | err = -EINVAL; |
0896b752 AA |
1005 | break; |
1006 | case ISCSI_UEVENT_CREATE_CONN: | |
1007 | err = iscsi_if_create_conn(transport, ev); | |
1008 | break; | |
1009 | case ISCSI_UEVENT_DESTROY_CONN: | |
1010 | err = iscsi_if_destroy_conn(transport, ev); | |
1011 | break; | |
1012 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1013 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1014 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 MC |
1015 | |
1016 | if (session && conn) | |
1017 | ev->r.retcode = transport->bind_conn(session, conn, | |
264faaaa | 1018 | ev->u.b_conn.transport_eph, |
7b7232f3 MC |
1019 | ev->u.b_conn.is_leading); |
1020 | else | |
1021 | err = -EINVAL; | |
0896b752 AA |
1022 | break; |
1023 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1024 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1025 | break; |
1026 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1027 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1028 | if (conn) |
1029 | ev->r.retcode = transport->start_conn(conn); | |
1030 | else | |
1031 | err = -EINVAL; | |
0896b752 AA |
1032 | break; |
1033 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1034 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1035 | if (conn) |
1036 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1037 | else | |
1038 | err = -EINVAL; | |
0896b752 AA |
1039 | break; |
1040 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1041 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1042 | if (conn) |
1043 | ev->r.retcode = transport->send_pdu(conn, | |
1044 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1045 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1046 | ev->u.send_pdu.data_size); | |
1047 | else | |
1048 | err = -EINVAL; | |
0896b752 AA |
1049 | break; |
1050 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1051 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1052 | break; |
264faaaa OG |
1053 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1054 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1055 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1056 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); | |
1057 | break; | |
01cb225d MC |
1058 | case ISCSI_UEVENT_TGT_DSCVR: |
1059 | err = iscsi_tgt_dscvr(transport, ev); | |
1060 | break; | |
0896b752 AA |
1061 | default: |
1062 | err = -EINVAL; | |
1063 | break; | |
1064 | } | |
1065 | ||
7b7232f3 | 1066 | module_put(transport->owner); |
0896b752 AA |
1067 | return err; |
1068 | } | |
1069 | ||
b5c7a12d MC |
1070 | /* |
1071 | * Get message from skb (based on rtnetlink_rcv_skb). Each message is | |
1072 | * processed by iscsi_if_recv_msg. Malformed skbs with wrong lengths or | |
1073 | * invalid creds are discarded silently. | |
1074 | */ | |
0896b752 AA |
1075 | static void |
1076 | iscsi_if_rx(struct sock *sk, int len) | |
1077 | { | |
1078 | struct sk_buff *skb; | |
1da177e4 | 1079 | |
0b950672 | 1080 | mutex_lock(&rx_queue_mutex); |
0896b752 | 1081 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
ee7f8e40 MC |
1082 | if (NETLINK_CREDS(skb)->uid) { |
1083 | skb_pull(skb, skb->len); | |
1084 | goto free_skb; | |
1085 | } | |
ee7f8e40 | 1086 | |
0896b752 AA |
1087 | while (skb->len >= NLMSG_SPACE(0)) { |
1088 | int err; | |
1089 | uint32_t rlen; | |
1090 | struct nlmsghdr *nlh; | |
1091 | struct iscsi_uevent *ev; | |
1092 | ||
b529ccf2 | 1093 | nlh = nlmsg_hdr(skb); |
0896b752 AA |
1094 | if (nlh->nlmsg_len < sizeof(*nlh) || |
1095 | skb->len < nlh->nlmsg_len) { | |
1096 | break; | |
1097 | } | |
ee7f8e40 | 1098 | |
0896b752 AA |
1099 | ev = NLMSG_DATA(nlh); |
1100 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1101 | if (rlen > skb->len) | |
1102 | rlen = skb->len; | |
ee7f8e40 | 1103 | |
0896b752 AA |
1104 | err = iscsi_if_recv_msg(skb, nlh); |
1105 | if (err) { | |
1106 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1107 | ev->iferror = err; | |
1108 | } | |
1109 | do { | |
1110 | /* | |
1111 | * special case for GET_STATS: | |
1112 | * on success - sending reply and stats from | |
1113 | * inside of if_recv_msg(), | |
1114 | * on error - fall through. | |
1115 | */ | |
1116 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1117 | break; | |
1118 | err = iscsi_if_send_reply( | |
1119 | NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq, | |
1120 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); | |
0896b752 AA |
1121 | } while (err < 0 && err != -ECONNREFUSED); |
1122 | skb_pull(skb, rlen); | |
1123 | } | |
ee7f8e40 | 1124 | free_skb: |
0896b752 AA |
1125 | kfree_skb(skb); |
1126 | } | |
0b950672 | 1127 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1128 | } |
1da177e4 | 1129 | |
7b8631b5 MC |
1130 | #define iscsi_cdev_to_conn(_cdev) \ |
1131 | iscsi_dev_to_conn(_cdev->dev) | |
1132 | ||
fd7255f5 MC |
1133 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
1134 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
1135 | __ATTR(_name,_mode,_show,_store) | |
1136 | ||
1da177e4 | 1137 | /* |
0896b752 | 1138 | * iSCSI connection attrs |
1da177e4 | 1139 | */ |
a54a52ca | 1140 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1141 | static ssize_t \ |
a54a52ca | 1142 | show_conn_param_##param(struct class_device *cdev, char *buf) \ |
0896b752 | 1143 | { \ |
7b8631b5 MC |
1144 | struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \ |
1145 | struct iscsi_transport *t = conn->transport; \ | |
a54a52ca | 1146 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1147 | } |
1148 | ||
a54a52ca MC |
1149 | #define iscsi_conn_attr(field, param) \ |
1150 | iscsi_conn_attr_show(param) \ | |
1151 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1152 | NULL); |
0896b752 | 1153 | |
a54a52ca MC |
1154 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1155 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1156 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1157 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1158 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1159 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1160 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
1161 | iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT); | |
1162 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); | |
1163 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
1164 | iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
1da177e4 | 1165 | |
7b8631b5 MC |
1166 | #define iscsi_cdev_to_session(_cdev) \ |
1167 | iscsi_dev_to_session(_cdev->dev) | |
1168 | ||
1da177e4 | 1169 | /* |
0896b752 | 1170 | * iSCSI session attrs |
1da177e4 | 1171 | */ |
a54a52ca | 1172 | #define iscsi_session_attr_show(param) \ |
fd7255f5 | 1173 | static ssize_t \ |
a54a52ca | 1174 | show_session_param_##param(struct class_device *cdev, char *buf) \ |
fd7255f5 MC |
1175 | { \ |
1176 | struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \ | |
1177 | struct iscsi_transport *t = session->transport; \ | |
a54a52ca | 1178 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
1179 | } |
1180 | ||
a54a52ca MC |
1181 | #define iscsi_session_attr(field, param) \ |
1182 | iscsi_session_attr_show(param) \ | |
1183 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ | |
fd7255f5 MC |
1184 | NULL); |
1185 | ||
a54a52ca MC |
1186 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME); |
1187 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN); | |
1188 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T); | |
1189 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN); | |
1190 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST); | |
1191 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST); | |
1192 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN); | |
1193 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN); | |
1194 | iscsi_session_attr(erl, ISCSI_PARAM_ERL); | |
1195 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT); | |
1da177e4 | 1196 | |
fd7255f5 MC |
1197 | #define iscsi_priv_session_attr_show(field, format) \ |
1198 | static ssize_t \ | |
a54a52ca | 1199 | show_priv_session_##field(struct class_device *cdev, char *buf) \ |
fd7255f5 | 1200 | { \ |
a54a52ca | 1201 | struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev);\ |
fd7255f5 MC |
1202 | return sprintf(buf, format"\n", session->field); \ |
1203 | } | |
1204 | ||
1205 | #define iscsi_priv_session_attr(field, format) \ | |
1206 | iscsi_priv_session_attr_show(field, format) \ | |
1207 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \ | |
1208 | NULL) | |
30a6c652 | 1209 | iscsi_priv_session_attr(recovery_tmo, "%d"); |
fd7255f5 | 1210 | |
1819dc81 MC |
1211 | /* |
1212 | * iSCSI host attrs | |
1213 | */ | |
1214 | #define iscsi_host_attr_show(param) \ | |
1215 | static ssize_t \ | |
1216 | show_host_param_##param(struct class_device *cdev, char *buf) \ | |
1217 | { \ | |
1218 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
1219 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ | |
1220 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
1221 | } | |
1222 | ||
1223 | #define iscsi_host_attr(field, param) \ | |
1224 | iscsi_host_attr_show(param) \ | |
1225 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
1226 | NULL); | |
1227 | ||
1228 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); | |
1229 | ||
fd7255f5 MC |
1230 | #define SETUP_PRIV_SESSION_RD_ATTR(field) \ |
1231 | do { \ | |
1232 | priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \ | |
1233 | count++; \ | |
1234 | } while (0) | |
1235 | ||
a54a52ca | 1236 | |
fd7255f5 MC |
1237 | #define SETUP_SESSION_RD_ATTR(field, param_flag) \ |
1238 | do { \ | |
1239 | if (tt->param_mask & param_flag) { \ | |
1240 | priv->session_attrs[count] = &class_device_attr_sess_##field; \ | |
1da177e4 | 1241 | count++; \ |
fd7255f5 MC |
1242 | } \ |
1243 | } while (0) | |
1244 | ||
fd7255f5 MC |
1245 | #define SETUP_CONN_RD_ATTR(field, param_flag) \ |
1246 | do { \ | |
1247 | if (tt->param_mask & param_flag) { \ | |
1248 | priv->conn_attrs[count] = &class_device_attr_conn_##field; \ | |
1249 | count++; \ | |
1250 | } \ | |
1251 | } while (0) | |
1da177e4 | 1252 | |
1819dc81 MC |
1253 | #define SETUP_HOST_RD_ATTR(field, param_flag) \ |
1254 | do { \ | |
1255 | if (tt->host_param_mask & param_flag) { \ | |
1256 | priv->host_attrs[count] = &class_device_attr_host_##field; \ | |
1257 | count++; \ | |
1258 | } \ | |
1259 | } while (0) | |
1260 | ||
0896b752 AA |
1261 | static int iscsi_session_match(struct attribute_container *cont, |
1262 | struct device *dev) | |
1da177e4 | 1263 | { |
7b8631b5 | 1264 | struct iscsi_cls_session *session; |
1da177e4 | 1265 | struct Scsi_Host *shost; |
0896b752 AA |
1266 | struct iscsi_internal *priv; |
1267 | ||
1268 | if (!iscsi_is_session_dev(dev)) | |
1269 | return 0; | |
1da177e4 | 1270 | |
7b8631b5 MC |
1271 | session = iscsi_dev_to_session(dev); |
1272 | shost = iscsi_session_to_shost(session); | |
0896b752 | 1273 | if (!shost->transportt) |
1da177e4 LT |
1274 | return 0; |
1275 | ||
0896b752 AA |
1276 | priv = to_iscsi_internal(shost->transportt); |
1277 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
1278 | return 0; |
1279 | ||
0896b752 | 1280 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
1281 | } |
1282 | ||
0896b752 AA |
1283 | static int iscsi_conn_match(struct attribute_container *cont, |
1284 | struct device *dev) | |
1285 | { | |
7b8631b5 MC |
1286 | struct iscsi_cls_session *session; |
1287 | struct iscsi_cls_conn *conn; | |
1da177e4 | 1288 | struct Scsi_Host *shost; |
0896b752 | 1289 | struct iscsi_internal *priv; |
1da177e4 | 1290 | |
0896b752 | 1291 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
1292 | return 0; |
1293 | ||
7b8631b5 MC |
1294 | conn = iscsi_dev_to_conn(dev); |
1295 | session = iscsi_dev_to_session(conn->dev.parent); | |
1296 | shost = iscsi_session_to_shost(session); | |
1297 | ||
0896b752 | 1298 | if (!shost->transportt) |
1da177e4 LT |
1299 | return 0; |
1300 | ||
0896b752 AA |
1301 | priv = to_iscsi_internal(shost->transportt); |
1302 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
1303 | return 0; | |
1da177e4 | 1304 | |
0896b752 AA |
1305 | return &priv->conn_cont.ac == cont; |
1306 | } | |
1307 | ||
30a6c652 MC |
1308 | static int iscsi_host_match(struct attribute_container *cont, |
1309 | struct device *dev) | |
1310 | { | |
1311 | struct Scsi_Host *shost; | |
1312 | struct iscsi_internal *priv; | |
1313 | ||
1314 | if (!scsi_is_host_device(dev)) | |
1315 | return 0; | |
1316 | ||
1317 | shost = dev_to_shost(dev); | |
1318 | if (!shost->transportt || | |
1319 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
1320 | return 0; | |
1321 | ||
1322 | priv = to_iscsi_internal(shost->transportt); | |
1323 | return &priv->t.host_attrs.ac == cont; | |
1324 | } | |
1325 | ||
7b8631b5 MC |
1326 | struct scsi_transport_template * |
1327 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
1328 | { |
1329 | struct iscsi_internal *priv; | |
1330 | unsigned long flags; | |
1331 | int count = 0, err; | |
1332 | ||
1333 | BUG_ON(!tt); | |
1334 | ||
1335 | priv = iscsi_if_transport_lookup(tt); | |
1336 | if (priv) | |
7b8631b5 | 1337 | return NULL; |
0896b752 | 1338 | |
24669f75 | 1339 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 1340 | if (!priv) |
7b8631b5 | 1341 | return NULL; |
0896b752 | 1342 | INIT_LIST_HEAD(&priv->list); |
53cb8a1f | 1343 | priv->daemon_pid = -1; |
0896b752 | 1344 | priv->iscsi_transport = tt; |
30a6c652 | 1345 | priv->t.user_scan = iscsi_user_scan; |
0896b752 AA |
1346 | |
1347 | priv->cdev.class = &iscsi_transport_class; | |
1348 | snprintf(priv->cdev.class_id, BUS_ID_SIZE, "%s", tt->name); | |
1349 | err = class_device_register(&priv->cdev); | |
1350 | if (err) | |
1351 | goto free_priv; | |
1352 | ||
1353 | err = sysfs_create_group(&priv->cdev.kobj, &iscsi_transport_group); | |
1354 | if (err) | |
1355 | goto unregister_cdev; | |
1356 | ||
30a6c652 MC |
1357 | /* host parameters */ |
1358 | priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; | |
1359 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; | |
1360 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
1361 | priv->t.host_size = sizeof(struct iscsi_host); | |
30a6c652 MC |
1362 | transport_container_register(&priv->t.host_attrs); |
1363 | ||
1819dc81 MC |
1364 | SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS); |
1365 | BUG_ON(count > ISCSI_HOST_ATTRS); | |
1366 | priv->host_attrs[count] = NULL; | |
1367 | count = 0; | |
1368 | ||
0896b752 AA |
1369 | /* connection parameters */ |
1370 | priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; | |
1371 | priv->conn_cont.ac.class = &iscsi_connection_class.class; | |
1372 | priv->conn_cont.ac.match = iscsi_conn_match; | |
1373 | transport_container_register(&priv->conn_cont); | |
1da177e4 | 1374 | |
fd7255f5 MC |
1375 | SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH); |
1376 | SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH); | |
1377 | SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN); | |
1378 | SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN); | |
1379 | SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN); | |
1380 | SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN); | |
1381 | SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS); | |
1382 | SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT); | |
8d2860b3 | 1383 | SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN); |
a54a52ca MC |
1384 | SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS); |
1385 | SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT); | |
0896b752 AA |
1386 | |
1387 | BUG_ON(count > ISCSI_CONN_ATTRS); | |
1388 | priv->conn_attrs[count] = NULL; | |
1da177e4 | 1389 | count = 0; |
1da177e4 | 1390 | |
0896b752 AA |
1391 | /* session parameters */ |
1392 | priv->session_cont.ac.attrs = &priv->session_attrs[0]; | |
1393 | priv->session_cont.ac.class = &iscsi_session_class.class; | |
1394 | priv->session_cont.ac.match = iscsi_session_match; | |
1395 | transport_container_register(&priv->session_cont); | |
1396 | ||
fd7255f5 MC |
1397 | SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN); |
1398 | SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T); | |
1399 | SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN); | |
1400 | SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST); | |
1401 | SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST); | |
1402 | SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN); | |
1403 | SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN); | |
1404 | SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL); | |
a54a52ca MC |
1405 | SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME); |
1406 | SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT); | |
30a6c652 | 1407 | SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); |
fd7255f5 | 1408 | |
0896b752 AA |
1409 | BUG_ON(count > ISCSI_SESSION_ATTRS); |
1410 | priv->session_attrs[count] = NULL; | |
1411 | ||
1412 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1413 | list_add(&priv->list, &iscsi_transports); | |
1414 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1415 | ||
1416 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 1417 | return &priv->t; |
1da177e4 | 1418 | |
0896b752 AA |
1419 | unregister_cdev: |
1420 | class_device_unregister(&priv->cdev); | |
1421 | free_priv: | |
1422 | kfree(priv); | |
7b8631b5 | 1423 | return NULL; |
1da177e4 | 1424 | } |
0896b752 AA |
1425 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
1426 | ||
1427 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
1428 | { | |
1429 | struct iscsi_internal *priv; | |
1430 | unsigned long flags; | |
1431 | ||
1432 | BUG_ON(!tt); | |
1433 | ||
0b950672 | 1434 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
1435 | |
1436 | priv = iscsi_if_transport_lookup(tt); | |
1437 | BUG_ON (!priv); | |
1438 | ||
0896b752 AA |
1439 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
1440 | list_del(&priv->list); | |
1441 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1442 | ||
1443 | transport_container_unregister(&priv->conn_cont); | |
1444 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 1445 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 AA |
1446 | |
1447 | sysfs_remove_group(&priv->cdev.kobj, &iscsi_transport_group); | |
1448 | class_device_unregister(&priv->cdev); | |
0b950672 | 1449 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 1450 | |
0896b752 AA |
1451 | return 0; |
1452 | } | |
1453 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 1454 | |
1da177e4 LT |
1455 | static __init int iscsi_transport_init(void) |
1456 | { | |
0896b752 | 1457 | int err; |
1da177e4 | 1458 | |
09492605 | 1459 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
1460 | ISCSI_TRANSPORT_VERSION); |
1461 | ||
41be1444 MC |
1462 | atomic_set(&iscsi_session_nr, 0); |
1463 | ||
0896b752 | 1464 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
1465 | if (err) |
1466 | return err; | |
0896b752 | 1467 | |
30a6c652 | 1468 | err = transport_class_register(&iscsi_host_class); |
0896b752 AA |
1469 | if (err) |
1470 | goto unregister_transport_class; | |
1471 | ||
30a6c652 MC |
1472 | err = transport_class_register(&iscsi_connection_class); |
1473 | if (err) | |
1474 | goto unregister_host_class; | |
1475 | ||
0896b752 AA |
1476 | err = transport_class_register(&iscsi_session_class); |
1477 | if (err) | |
1478 | goto unregister_conn_class; | |
1479 | ||
af65bdfc | 1480 | nls = netlink_kernel_create(NETLINK_ISCSI, 1, iscsi_if_rx, NULL, |
7b8631b5 | 1481 | THIS_MODULE); |
0896b752 AA |
1482 | if (!nls) { |
1483 | err = -ENOBUFS; | |
43a145a3 | 1484 | goto unregister_session_class; |
0896b752 AA |
1485 | } |
1486 | ||
43a145a3 | 1487 | return 0; |
0896b752 | 1488 | |
0896b752 AA |
1489 | unregister_session_class: |
1490 | transport_class_unregister(&iscsi_session_class); | |
1491 | unregister_conn_class: | |
1492 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
1493 | unregister_host_class: |
1494 | transport_class_unregister(&iscsi_host_class); | |
0896b752 AA |
1495 | unregister_transport_class: |
1496 | class_unregister(&iscsi_transport_class); | |
1497 | return err; | |
1da177e4 LT |
1498 | } |
1499 | ||
1500 | static void __exit iscsi_transport_exit(void) | |
1501 | { | |
0896b752 | 1502 | sock_release(nls->sk_socket); |
0896b752 AA |
1503 | transport_class_unregister(&iscsi_connection_class); |
1504 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 1505 | transport_class_unregister(&iscsi_host_class); |
0896b752 | 1506 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
1507 | } |
1508 | ||
1509 | module_init(iscsi_transport_init); | |
1510 | module_exit(iscsi_transport_exit); | |
1511 | ||
0896b752 AA |
1512 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
1513 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
1514 | "Alex Aizman <itn780@yahoo.com>"); | |
1515 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 1516 | MODULE_LICENSE("GPL"); |
f4246b33 | 1517 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |