Commit | Line | Data |
---|---|---|
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 | |
843c0a8a | 33 | #define ISCSI_SESSION_ATTRS 16 |
8d2860b3 | 34 | #define ISCSI_CONN_ATTRS 11 |
d8196ed2 | 35 | #define ISCSI_HOST_ATTRS 4 |
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 */ |
d8bf541e | 53 | static struct workqueue_struct *iscsi_eh_timer_workq; |
b5c7a12d | 54 | |
0896b752 AA |
55 | /* |
56 | * list of registered transports and lock that must | |
57 | * be held while accessing list. The iscsi_transport_lock must | |
0b950672 | 58 | * be acquired after the rx_queue_mutex. |
0896b752 AA |
59 | */ |
60 | static LIST_HEAD(iscsi_transports); | |
61 | static DEFINE_SPINLOCK(iscsi_transport_lock); | |
62 | ||
63 | #define to_iscsi_internal(tmpl) \ | |
64 | container_of(tmpl, struct iscsi_internal, t) | |
65 | ||
66 | #define cdev_to_iscsi_internal(_cdev) \ | |
67 | container_of(_cdev, struct iscsi_internal, cdev) | |
68 | ||
69 | static void iscsi_transport_release(struct class_device *cdev) | |
70 | { | |
71 | struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); | |
72 | kfree(priv); | |
73 | } | |
1da177e4 | 74 | |
0896b752 AA |
75 | /* |
76 | * iscsi_transport_class represents the iscsi_transports that are | |
77 | * registered. | |
78 | */ | |
79 | static struct class iscsi_transport_class = { | |
80 | .name = "iscsi_transport", | |
81 | .release = iscsi_transport_release, | |
82 | }; | |
83 | ||
84 | static ssize_t | |
85 | show_transport_handle(struct class_device *cdev, char *buf) | |
86 | { | |
87 | struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); | |
762e2bfa | 88 | return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); |
0896b752 AA |
89 | } |
90 | static CLASS_DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); | |
91 | ||
92 | #define show_transport_attr(name, format) \ | |
93 | static ssize_t \ | |
94 | show_transport_##name(struct class_device *cdev, char *buf) \ | |
95 | { \ | |
96 | struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); \ | |
97 | return sprintf(buf, format"\n", priv->iscsi_transport->name); \ | |
98 | } \ | |
99 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); | |
100 | ||
101 | show_transport_attr(caps, "0x%x"); | |
102 | show_transport_attr(max_lun, "%d"); | |
103 | show_transport_attr(max_conn, "%d"); | |
104 | show_transport_attr(max_cmd_len, "%d"); | |
105 | ||
106 | static struct attribute *iscsi_transport_attrs[] = { | |
107 | &class_device_attr_handle.attr, | |
108 | &class_device_attr_caps.attr, | |
109 | &class_device_attr_max_lun.attr, | |
110 | &class_device_attr_max_conn.attr, | |
111 | &class_device_attr_max_cmd_len.attr, | |
112 | NULL, | |
113 | }; | |
114 | ||
115 | static struct attribute_group iscsi_transport_group = { | |
116 | .attrs = iscsi_transport_attrs, | |
117 | }; | |
118 | ||
30a6c652 MC |
119 | static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
120 | struct class_device *cdev) | |
121 | { | |
122 | struct Scsi_Host *shost = dev_to_shost(dev); | |
123 | struct iscsi_host *ihost = shost->shost_data; | |
124 | ||
125 | memset(ihost, 0, sizeof(*ihost)); | |
126 | INIT_LIST_HEAD(&ihost->sessions); | |
127 | mutex_init(&ihost->mutex); | |
128 | return 0; | |
129 | } | |
130 | ||
131 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
132 | "iscsi_host", | |
133 | iscsi_setup_host, | |
134 | NULL, | |
135 | NULL); | |
136 | ||
0896b752 AA |
137 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
138 | "iscsi_session", | |
1da177e4 LT |
139 | NULL, |
140 | NULL, | |
141 | NULL); | |
142 | ||
0896b752 AA |
143 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
144 | "iscsi_connection", | |
1da177e4 LT |
145 | NULL, |
146 | NULL, | |
147 | NULL); | |
0896b752 AA |
148 | |
149 | static struct sock *nls; | |
0b950672 | 150 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 151 | |
7b7232f3 MC |
152 | static LIST_HEAD(sesslist); |
153 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
154 | static LIST_HEAD(connlist); |
155 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 156 | |
b5c7a12d MC |
157 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
158 | { | |
159 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
160 | return sess->sid; | |
161 | } | |
162 | ||
163 | /* | |
164 | * Returns the matching session to a given sid | |
165 | */ | |
166 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
167 | { |
168 | unsigned long flags; | |
169 | struct iscsi_cls_session *sess; | |
170 | ||
171 | spin_lock_irqsave(&sesslock, flags); | |
172 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 173 | if (sess->sid == sid) { |
7b7232f3 MC |
174 | spin_unlock_irqrestore(&sesslock, flags); |
175 | return sess; | |
176 | } | |
177 | } | |
178 | spin_unlock_irqrestore(&sesslock, flags); | |
179 | return NULL; | |
180 | } | |
181 | ||
b5c7a12d MC |
182 | /* |
183 | * Returns the matching connection to a given sid / cid tuple | |
184 | */ | |
185 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
186 | { |
187 | unsigned long flags; | |
188 | struct iscsi_cls_conn *conn; | |
189 | ||
190 | spin_lock_irqsave(&connlock, flags); | |
191 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 192 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
193 | spin_unlock_irqrestore(&connlock, flags); |
194 | return conn; | |
195 | } | |
196 | } | |
197 | spin_unlock_irqrestore(&connlock, flags); | |
198 | return NULL; | |
199 | } | |
200 | ||
7b8631b5 MC |
201 | /* |
202 | * The following functions can be used by LLDs that allocate | |
203 | * their own scsi_hosts or by software iscsi LLDs | |
204 | */ | |
205 | static void iscsi_session_release(struct device *dev) | |
206 | { | |
207 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 208 | struct Scsi_Host *shost; |
0896b752 | 209 | |
7b8631b5 MC |
210 | shost = iscsi_session_to_shost(session); |
211 | scsi_host_put(shost); | |
212 | kfree(session); | |
7b8631b5 | 213 | } |
0896b752 | 214 | |
7b8631b5 MC |
215 | static int iscsi_is_session_dev(const struct device *dev) |
216 | { | |
217 | return dev->release == iscsi_session_release; | |
218 | } | |
0896b752 | 219 | |
30a6c652 MC |
220 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
221 | uint id, uint lun) | |
222 | { | |
223 | struct iscsi_host *ihost = shost->shost_data; | |
224 | struct iscsi_cls_session *session; | |
225 | ||
226 | mutex_lock(&ihost->mutex); | |
227 | list_for_each_entry(session, &ihost->sessions, host_list) { | |
e6f3b63f | 228 | if ((channel == SCAN_WILD_CARD || channel == 0) && |
30a6c652 | 229 | (id == SCAN_WILD_CARD || id == session->target_id)) |
e6f3b63f | 230 | scsi_scan_target(&session->dev, 0, |
30a6c652 MC |
231 | session->target_id, lun, 1); |
232 | } | |
233 | mutex_unlock(&ihost->mutex); | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
c4028958 | 238 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 239 | { |
c4028958 DH |
240 | struct iscsi_cls_session *session = |
241 | container_of(work, struct iscsi_cls_session, | |
242 | recovery_work.work); | |
30a6c652 | 243 | |
be2df72e OG |
244 | dev_printk(KERN_INFO, &session->dev, "iscsi: session recovery timed " |
245 | "out after %d secs\n", session->recovery_tmo); | |
30a6c652 MC |
246 | |
247 | if (session->transport->session_recovery_timedout) | |
248 | session->transport->session_recovery_timedout(session); | |
249 | ||
250 | scsi_target_unblock(&session->dev); | |
251 | } | |
252 | ||
253 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
254 | { | |
255 | if (!cancel_delayed_work(&session->recovery_work)) | |
d8bf541e | 256 | flush_workqueue(iscsi_eh_timer_workq); |
30a6c652 MC |
257 | scsi_target_unblock(&session->dev); |
258 | } | |
259 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); | |
260 | ||
261 | void iscsi_block_session(struct iscsi_cls_session *session) | |
262 | { | |
263 | scsi_target_block(&session->dev); | |
d8bf541e MC |
264 | queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work, |
265 | session->recovery_tmo * HZ); | |
30a6c652 MC |
266 | } |
267 | EXPORT_SYMBOL_GPL(iscsi_block_session); | |
268 | ||
7b8631b5 | 269 | struct iscsi_cls_session * |
8434aa8b MC |
270 | iscsi_alloc_session(struct Scsi_Host *shost, |
271 | struct iscsi_transport *transport) | |
7b8631b5 MC |
272 | { |
273 | struct iscsi_cls_session *session; | |
7b8631b5 | 274 | |
b5c7a12d MC |
275 | session = kzalloc(sizeof(*session) + transport->sessiondata_size, |
276 | GFP_KERNEL); | |
7b8631b5 | 277 | if (!session) |
f53a88da MC |
278 | return NULL; |
279 | ||
7b8631b5 | 280 | session->transport = transport; |
30a6c652 | 281 | session->recovery_tmo = 120; |
c4028958 | 282 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 MC |
283 | INIT_LIST_HEAD(&session->host_list); |
284 | INIT_LIST_HEAD(&session->sess_list); | |
7b8631b5 | 285 | |
6a8a0d36 MC |
286 | /* this is released in the dev's release function */ |
287 | scsi_host_get(shost); | |
8434aa8b MC |
288 | session->dev.parent = &shost->shost_gendev; |
289 | session->dev.release = iscsi_session_release; | |
290 | device_initialize(&session->dev); | |
b5c7a12d MC |
291 | if (transport->sessiondata_size) |
292 | session->dd_data = &session[1]; | |
8434aa8b MC |
293 | return session; |
294 | } | |
295 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
296 | ||
6a8a0d36 | 297 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
298 | { |
299 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
300 | struct iscsi_host *ihost; | |
301 | int err; | |
b5c7a12d | 302 | |
30a6c652 | 303 | ihost = shost->shost_data; |
41be1444 | 304 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
6a8a0d36 | 305 | session->target_id = target_id; |
30a6c652 | 306 | |
b5c7a12d MC |
307 | snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", |
308 | session->sid); | |
8434aa8b | 309 | err = device_add(&session->dev); |
7b8631b5 MC |
310 | if (err) { |
311 | dev_printk(KERN_ERR, &session->dev, "iscsi: could not " | |
312 | "register session's dev\n"); | |
8434aa8b | 313 | goto release_host; |
7b8631b5 MC |
314 | } |
315 | transport_register_device(&session->dev); | |
316 | ||
30a6c652 MC |
317 | mutex_lock(&ihost->mutex); |
318 | list_add(&session->host_list, &ihost->sessions); | |
319 | mutex_unlock(&ihost->mutex); | |
8434aa8b | 320 | return 0; |
30a6c652 | 321 | |
8434aa8b MC |
322 | release_host: |
323 | scsi_host_put(shost); | |
324 | return err; | |
7b8631b5 | 325 | } |
8434aa8b | 326 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
327 | |
328 | /** | |
8434aa8b MC |
329 | * iscsi_create_session - create iscsi class session |
330 | * @shost: scsi host | |
331 | * @transport: iscsi transport | |
eb44820c | 332 | * @target_id: which target |
7b8631b5 | 333 | * |
8434aa8b | 334 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 335 | */ |
8434aa8b MC |
336 | struct iscsi_cls_session * |
337 | iscsi_create_session(struct Scsi_Host *shost, | |
6a8a0d36 MC |
338 | struct iscsi_transport *transport, |
339 | unsigned int target_id) | |
8434aa8b MC |
340 | { |
341 | struct iscsi_cls_session *session; | |
342 | ||
343 | session = iscsi_alloc_session(shost, transport); | |
344 | if (!session) | |
345 | return NULL; | |
346 | ||
6a8a0d36 | 347 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
348 | iscsi_free_session(session); |
349 | return NULL; | |
350 | } | |
351 | return session; | |
352 | } | |
353 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
354 | ||
355 | void iscsi_remove_session(struct iscsi_cls_session *session) | |
7b8631b5 | 356 | { |
30a6c652 MC |
357 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
358 | struct iscsi_host *ihost = shost->shost_data; | |
359 | ||
360 | if (!cancel_delayed_work(&session->recovery_work)) | |
d8bf541e | 361 | flush_workqueue(iscsi_eh_timer_workq); |
30a6c652 MC |
362 | |
363 | mutex_lock(&ihost->mutex); | |
364 | list_del(&session->host_list); | |
365 | mutex_unlock(&ihost->mutex); | |
366 | ||
8434aa8b MC |
367 | scsi_remove_target(&session->dev); |
368 | ||
7b8631b5 | 369 | transport_unregister_device(&session->dev); |
8434aa8b MC |
370 | device_del(&session->dev); |
371 | } | |
372 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
373 | ||
374 | void iscsi_free_session(struct iscsi_cls_session *session) | |
375 | { | |
376 | put_device(&session->dev); | |
7b8631b5 MC |
377 | } |
378 | ||
8434aa8b MC |
379 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
380 | ||
381 | /** | |
382 | * iscsi_destroy_session - destroy iscsi session | |
383 | * @session: iscsi_session | |
384 | * | |
385 | * Can be called by a LLD or iscsi_transport. There must not be | |
386 | * any running connections. | |
eb44820c | 387 | */ |
8434aa8b MC |
388 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
389 | { | |
390 | iscsi_remove_session(session); | |
391 | iscsi_free_session(session); | |
392 | return 0; | |
393 | } | |
7b8631b5 MC |
394 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
395 | ||
396 | static void iscsi_conn_release(struct device *dev) | |
397 | { | |
398 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
399 | struct device *parent = conn->dev.parent; | |
400 | ||
401 | kfree(conn); | |
402 | put_device(parent); | |
403 | } | |
404 | ||
405 | static int iscsi_is_conn_dev(const struct device *dev) | |
406 | { | |
407 | return dev->release == iscsi_conn_release; | |
408 | } | |
409 | ||
410 | /** | |
411 | * iscsi_create_conn - create iscsi class connection | |
412 | * @session: iscsi cls session | |
413 | * @cid: connection id | |
414 | * | |
415 | * This can be called from a LLD or iscsi_transport. The connection | |
416 | * is child of the session so cid must be unique for all connections | |
417 | * on the session. | |
b5c7a12d MC |
418 | * |
419 | * Since we do not support MCS, cid will normally be zero. In some cases | |
420 | * for software iscsi we could be trying to preallocate a connection struct | |
421 | * in which case there could be two connection structs and cid would be | |
422 | * non-zero. | |
eb44820c | 423 | */ |
7b8631b5 MC |
424 | struct iscsi_cls_conn * |
425 | iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid) | |
426 | { | |
427 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 MC |
428 | struct iscsi_cls_conn *conn; |
429 | int err; | |
430 | ||
431 | conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL); | |
432 | if (!conn) | |
433 | return NULL; | |
434 | ||
435 | if (transport->conndata_size) | |
436 | conn->dd_data = &conn[1]; | |
437 | ||
438 | INIT_LIST_HEAD(&conn->conn_list); | |
439 | conn->transport = transport; | |
b5c7a12d | 440 | conn->cid = cid; |
7b8631b5 MC |
441 | |
442 | /* this is released in the dev's release function */ | |
443 | if (!get_device(&session->dev)) | |
43a145a3 | 444 | goto free_conn; |
b5c7a12d | 445 | |
7b8631b5 | 446 | snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u", |
b5c7a12d | 447 | session->sid, cid); |
7b8631b5 MC |
448 | conn->dev.parent = &session->dev; |
449 | conn->dev.release = iscsi_conn_release; | |
450 | err = device_register(&conn->dev); | |
451 | if (err) { | |
452 | dev_printk(KERN_ERR, &conn->dev, "iscsi: could not register " | |
453 | "connection's dev\n"); | |
454 | goto release_parent_ref; | |
455 | } | |
456 | transport_register_device(&conn->dev); | |
457 | return conn; | |
458 | ||
459 | release_parent_ref: | |
460 | put_device(&session->dev); | |
461 | free_conn: | |
462 | kfree(conn); | |
463 | return NULL; | |
464 | } | |
465 | ||
466 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
467 | ||
468 | /** | |
469 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 470 | * @conn: iscsi cls session |
7b8631b5 | 471 | * |
eb44820c RL |
472 | * This can be called from an LLD or iscsi_transport. |
473 | */ | |
7b8631b5 MC |
474 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
475 | { | |
476 | transport_unregister_device(&conn->dev); | |
477 | device_unregister(&conn->dev); | |
478 | return 0; | |
479 | } | |
480 | ||
481 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); | |
482 | ||
7b8631b5 MC |
483 | /* |
484 | * iscsi interface functions | |
485 | */ | |
0896b752 AA |
486 | static struct iscsi_internal * |
487 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
488 | { | |
489 | struct iscsi_internal *priv; | |
490 | unsigned long flags; | |
491 | ||
492 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
493 | list_for_each_entry(priv, &iscsi_transports, list) { | |
494 | if (tt == priv->iscsi_transport) { | |
495 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
496 | return priv; | |
497 | } | |
498 | } | |
499 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
500 | return NULL; | |
501 | } | |
1da177e4 | 502 | |
53cb8a1f | 503 | static int |
43a145a3 | 504 | iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp) |
53cb8a1f | 505 | { |
53cb8a1f MC |
506 | int rc; |
507 | ||
9aaa2b46 | 508 | rc = netlink_broadcast(nls, skb, 0, 1, gfp); |
53cb8a1f | 509 | if (rc < 0) { |
53cb8a1f MC |
510 | printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc); |
511 | return rc; | |
512 | } | |
513 | ||
53cb8a1f MC |
514 | return 0; |
515 | } | |
516 | ||
0896b752 | 517 | static int |
43a145a3 | 518 | iscsi_unicast_skb(struct sk_buff *skb, int pid) |
0896b752 | 519 | { |
0896b752 | 520 | int rc; |
1da177e4 | 521 | |
790f39a2 | 522 | rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT); |
0896b752 | 523 | if (rc < 0) { |
0896b752 AA |
524 | printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc); |
525 | return rc; | |
526 | } | |
527 | ||
0896b752 | 528 | return 0; |
1da177e4 | 529 | } |
1da177e4 | 530 | |
7b7232f3 | 531 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 532 | char *data, uint32_t data_size) |
1da177e4 | 533 | { |
0896b752 AA |
534 | struct nlmsghdr *nlh; |
535 | struct sk_buff *skb; | |
536 | struct iscsi_uevent *ev; | |
0896b752 | 537 | char *pdu; |
790f39a2 | 538 | struct iscsi_internal *priv; |
0896b752 AA |
539 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
540 | data_size); | |
541 | ||
790f39a2 MC |
542 | priv = iscsi_if_transport_lookup(conn->transport); |
543 | if (!priv) | |
544 | return -EINVAL; | |
545 | ||
43a145a3 | 546 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 547 | if (!skb) { |
7b7232f3 | 548 | iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED); |
7b8631b5 MC |
549 | dev_printk(KERN_ERR, &conn->dev, "iscsi: can not deliver " |
550 | "control PDU: OOM\n"); | |
0896b752 AA |
551 | return -ENOMEM; |
552 | } | |
1da177e4 | 553 | |
790f39a2 | 554 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
555 | ev = NLMSG_DATA(nlh); |
556 | memset(ev, 0, sizeof(*ev)); | |
557 | ev->transport_handle = iscsi_handle(conn->transport); | |
558 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
559 | ev->r.recv_req.cid = conn->cid; |
560 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
561 | pdu = (char*)ev + sizeof(*ev); |
562 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
563 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 564 | |
43a145a3 | 565 | return iscsi_unicast_skb(skb, priv->daemon_pid); |
1da177e4 | 566 | } |
0896b752 | 567 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 568 | |
7b7232f3 | 569 | void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 570 | { |
0896b752 AA |
571 | struct nlmsghdr *nlh; |
572 | struct sk_buff *skb; | |
573 | struct iscsi_uevent *ev; | |
790f39a2 | 574 | struct iscsi_internal *priv; |
0896b752 AA |
575 | int len = NLMSG_SPACE(sizeof(*ev)); |
576 | ||
790f39a2 MC |
577 | priv = iscsi_if_transport_lookup(conn->transport); |
578 | if (!priv) | |
579 | return; | |
580 | ||
43a145a3 | 581 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 582 | if (!skb) { |
7b8631b5 MC |
583 | dev_printk(KERN_ERR, &conn->dev, "iscsi: gracefully ignored " |
584 | "conn error (%d)\n", error); | |
0896b752 AA |
585 | return; |
586 | } | |
587 | ||
790f39a2 | 588 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
589 | ev = NLMSG_DATA(nlh); |
590 | ev->transport_handle = iscsi_handle(conn->transport); | |
591 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 592 | ev->r.connerror.error = error; |
b5c7a12d MC |
593 | ev->r.connerror.cid = conn->cid; |
594 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 595 | |
43a145a3 | 596 | iscsi_broadcast_skb(skb, GFP_ATOMIC); |
1da177e4 | 597 | |
7b8631b5 MC |
598 | dev_printk(KERN_INFO, &conn->dev, "iscsi: detected conn error (%d)\n", |
599 | error); | |
0896b752 AA |
600 | } |
601 | EXPORT_SYMBOL_GPL(iscsi_conn_error); | |
602 | ||
603 | static int | |
604 | iscsi_if_send_reply(int pid, int seq, int type, int done, int multi, | |
605 | void *payload, int size) | |
606 | { | |
607 | struct sk_buff *skb; | |
608 | struct nlmsghdr *nlh; | |
609 | int len = NLMSG_SPACE(size); | |
610 | int flags = multi ? NLM_F_MULTI : 0; | |
611 | int t = done ? NLMSG_DONE : type; | |
612 | ||
43a145a3 | 613 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
614 | if (!skb) { |
615 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
616 | return -ENOMEM; | |
617 | } | |
0896b752 AA |
618 | |
619 | nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0); | |
620 | nlh->nlmsg_flags = flags; | |
621 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43a145a3 | 622 | return iscsi_unicast_skb(skb, pid); |
1da177e4 | 623 | } |
1da177e4 | 624 | |
7b8631b5 | 625 | static int |
5b940adf | 626 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
627 | { |
628 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
629 | struct iscsi_stats *stats; | |
630 | struct sk_buff *skbstat; | |
631 | struct iscsi_cls_conn *conn; | |
632 | struct nlmsghdr *nlhstat; | |
633 | struct iscsi_uevent *evstat; | |
790f39a2 | 634 | struct iscsi_internal *priv; |
7b8631b5 MC |
635 | int len = NLMSG_SPACE(sizeof(*ev) + |
636 | sizeof(struct iscsi_stats) + | |
637 | sizeof(struct iscsi_stats_custom) * | |
638 | ISCSI_STATS_CUSTOM_MAX); | |
639 | int err = 0; | |
0896b752 | 640 | |
790f39a2 MC |
641 | priv = iscsi_if_transport_lookup(transport); |
642 | if (!priv) | |
643 | return -EINVAL; | |
644 | ||
b5c7a12d | 645 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
646 | if (!conn) |
647 | return -EEXIST; | |
0896b752 | 648 | |
7b8631b5 MC |
649 | do { |
650 | int actual_size; | |
0896b752 | 651 | |
43a145a3 | 652 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 MC |
653 | if (!skbstat) { |
654 | dev_printk(KERN_ERR, &conn->dev, "iscsi: can not " | |
655 | "deliver stats: OOM\n"); | |
656 | return -ENOMEM; | |
657 | } | |
658 | ||
790f39a2 | 659 | nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0, |
7b8631b5 MC |
660 | (len - sizeof(*nlhstat)), 0); |
661 | evstat = NLMSG_DATA(nlhstat); | |
662 | memset(evstat, 0, sizeof(*evstat)); | |
663 | evstat->transport_handle = iscsi_handle(conn->transport); | |
664 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
665 | evstat->u.get_stats.cid = |
666 | ev->u.get_stats.cid; | |
667 | evstat->u.get_stats.sid = | |
668 | ev->u.get_stats.sid; | |
7b8631b5 MC |
669 | stats = (struct iscsi_stats *) |
670 | ((char*)evstat + sizeof(*evstat)); | |
671 | memset(stats, 0, sizeof(*stats)); | |
672 | ||
7b7232f3 | 673 | transport->get_stats(conn, stats); |
7b8631b5 MC |
674 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
675 | sizeof(struct iscsi_stats) + | |
676 | sizeof(struct iscsi_stats_custom) * | |
677 | stats->custom_length); | |
678 | actual_size -= sizeof(*nlhstat); | |
679 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 680 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
681 | nlhstat->nlmsg_len = actual_size; |
682 | ||
43a145a3 | 683 | err = iscsi_unicast_skb(skbstat, priv->daemon_pid); |
7b8631b5 MC |
684 | } while (err < 0 && err != -ECONNREFUSED); |
685 | ||
686 | return err; | |
0896b752 AA |
687 | } |
688 | ||
53cb8a1f MC |
689 | /** |
690 | * iscsi_if_destroy_session_done - send session destr. completion event | |
691 | * @conn: last connection for session | |
692 | * | |
693 | * This is called by HW iscsi LLDs to notify userpsace that its HW has | |
694 | * removed a session. | |
eb44820c | 695 | */ |
53cb8a1f MC |
696 | int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn) |
697 | { | |
698 | struct iscsi_internal *priv; | |
699 | struct iscsi_cls_session *session; | |
700 | struct Scsi_Host *shost; | |
701 | struct iscsi_uevent *ev; | |
702 | struct sk_buff *skb; | |
703 | struct nlmsghdr *nlh; | |
704 | unsigned long flags; | |
705 | int rc, len = NLMSG_SPACE(sizeof(*ev)); | |
706 | ||
707 | priv = iscsi_if_transport_lookup(conn->transport); | |
708 | if (!priv) | |
709 | return -EINVAL; | |
710 | ||
711 | session = iscsi_dev_to_session(conn->dev.parent); | |
712 | shost = iscsi_session_to_shost(session); | |
713 | ||
43a145a3 | 714 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f MC |
715 | if (!skb) { |
716 | dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " | |
717 | "session creation event\n"); | |
718 | return -ENOMEM; | |
719 | } | |
720 | ||
721 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
722 | ev = NLMSG_DATA(nlh); | |
723 | ev->transport_handle = iscsi_handle(conn->transport); | |
724 | ev->type = ISCSI_KEVENT_DESTROY_SESSION; | |
725 | ev->r.d_session.host_no = shost->host_no; | |
726 | ev->r.d_session.sid = session->sid; | |
727 | ||
728 | /* | |
729 | * this will occur if the daemon is not up, so we just warn | |
730 | * the user and when the daemon is restarted it will handle it | |
731 | */ | |
43a145a3 | 732 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
53cb8a1f MC |
733 | if (rc < 0) |
734 | dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " | |
735 | "session destruction event. Check iscsi daemon\n"); | |
736 | ||
737 | spin_lock_irqsave(&sesslock, flags); | |
738 | list_del(&session->sess_list); | |
739 | spin_unlock_irqrestore(&sesslock, flags); | |
740 | ||
741 | spin_lock_irqsave(&connlock, flags); | |
742 | conn->active = 0; | |
743 | list_del(&conn->conn_list); | |
744 | spin_unlock_irqrestore(&connlock, flags); | |
745 | ||
746 | return rc; | |
747 | } | |
748 | EXPORT_SYMBOL_GPL(iscsi_if_destroy_session_done); | |
749 | ||
750 | /** | |
751 | * iscsi_if_create_session_done - send session creation completion event | |
752 | * @conn: leading connection for session | |
753 | * | |
754 | * This is called by HW iscsi LLDs to notify userpsace that its HW has | |
755 | * created a session or a existing session is back in the logged in state. | |
eb44820c | 756 | */ |
53cb8a1f MC |
757 | int iscsi_if_create_session_done(struct iscsi_cls_conn *conn) |
758 | { | |
759 | struct iscsi_internal *priv; | |
760 | struct iscsi_cls_session *session; | |
761 | struct Scsi_Host *shost; | |
762 | struct iscsi_uevent *ev; | |
763 | struct sk_buff *skb; | |
764 | struct nlmsghdr *nlh; | |
765 | unsigned long flags; | |
766 | int rc, len = NLMSG_SPACE(sizeof(*ev)); | |
767 | ||
768 | priv = iscsi_if_transport_lookup(conn->transport); | |
769 | if (!priv) | |
770 | return -EINVAL; | |
771 | ||
772 | session = iscsi_dev_to_session(conn->dev.parent); | |
773 | shost = iscsi_session_to_shost(session); | |
774 | ||
43a145a3 | 775 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f MC |
776 | if (!skb) { |
777 | dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " | |
778 | "session creation event\n"); | |
779 | return -ENOMEM; | |
780 | } | |
781 | ||
782 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
783 | ev = NLMSG_DATA(nlh); | |
784 | ev->transport_handle = iscsi_handle(conn->transport); | |
785 | ev->type = ISCSI_UEVENT_CREATE_SESSION; | |
786 | ev->r.c_session_ret.host_no = shost->host_no; | |
787 | ev->r.c_session_ret.sid = session->sid; | |
788 | ||
789 | /* | |
790 | * this will occur if the daemon is not up, so we just warn | |
791 | * the user and when the daemon is restarted it will handle it | |
792 | */ | |
43a145a3 | 793 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
53cb8a1f MC |
794 | if (rc < 0) |
795 | dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " | |
796 | "session creation event. Check iscsi daemon\n"); | |
797 | ||
798 | spin_lock_irqsave(&sesslock, flags); | |
799 | list_add(&session->sess_list, &sesslist); | |
800 | spin_unlock_irqrestore(&sesslock, flags); | |
801 | ||
802 | spin_lock_irqsave(&connlock, flags); | |
803 | list_add(&conn->conn_list, &connlist); | |
804 | conn->active = 1; | |
805 | spin_unlock_irqrestore(&connlock, flags); | |
806 | return rc; | |
807 | } | |
808 | EXPORT_SYMBOL_GPL(iscsi_if_create_session_done); | |
809 | ||
0896b752 AA |
810 | static int |
811 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev) | |
812 | { | |
813 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 814 | struct iscsi_cls_session *session; |
7996a778 | 815 | unsigned long flags; |
b5c7a12d | 816 | uint32_t hostno; |
0896b752 | 817 | |
7996a778 | 818 | session = transport->create_session(transport, &priv->t, |
1548271e MC |
819 | ev->u.c_session.cmds_max, |
820 | ev->u.c_session.queue_depth, | |
7b7232f3 | 821 | ev->u.c_session.initial_cmdsn, |
b5c7a12d | 822 | &hostno); |
7b7232f3 | 823 | if (!session) |
7b8631b5 | 824 | return -ENOMEM; |
0896b752 | 825 | |
7996a778 MC |
826 | spin_lock_irqsave(&sesslock, flags); |
827 | list_add(&session->sess_list, &sesslist); | |
828 | spin_unlock_irqrestore(&sesslock, flags); | |
829 | ||
b5c7a12d MC |
830 | ev->r.c_session_ret.host_no = hostno; |
831 | ev->r.c_session_ret.sid = session->sid; | |
0896b752 | 832 | return 0; |
0896b752 AA |
833 | } |
834 | ||
835 | static int | |
7b7232f3 | 836 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 837 | { |
7b8631b5 | 838 | struct iscsi_cls_conn *conn; |
7b7232f3 | 839 | struct iscsi_cls_session *session; |
0896b752 | 840 | unsigned long flags; |
7b8631b5 | 841 | |
b5c7a12d MC |
842 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
843 | if (!session) { | |
844 | printk(KERN_ERR "iscsi: invalid session %d\n", | |
845 | ev->u.c_conn.sid); | |
7b8631b5 | 846 | return -EINVAL; |
b5c7a12d | 847 | } |
0896b752 | 848 | |
7b7232f3 | 849 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d MC |
850 | if (!conn) { |
851 | printk(KERN_ERR "iscsi: couldn't create a new " | |
852 | "connection for session %d\n", | |
853 | session->sid); | |
7b7232f3 | 854 | return -ENOMEM; |
b5c7a12d | 855 | } |
0896b752 | 856 | |
b5c7a12d MC |
857 | ev->r.c_conn_ret.sid = session->sid; |
858 | ev->r.c_conn_ret.cid = conn->cid; | |
0896b752 AA |
859 | |
860 | spin_lock_irqsave(&connlock, flags); | |
861 | list_add(&conn->conn_list, &connlist); | |
0896b752 AA |
862 | conn->active = 1; |
863 | spin_unlock_irqrestore(&connlock, flags); | |
864 | ||
0896b752 | 865 | return 0; |
1da177e4 LT |
866 | } |
867 | ||
0896b752 AA |
868 | static int |
869 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
870 | { | |
871 | unsigned long flags; | |
7b8631b5 | 872 | struct iscsi_cls_conn *conn; |
0896b752 | 873 | |
b5c7a12d | 874 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 875 | if (!conn) |
7b8631b5 | 876 | return -EINVAL; |
0896b752 AA |
877 | spin_lock_irqsave(&connlock, flags); |
878 | conn->active = 0; | |
879 | list_del(&conn->conn_list); | |
880 | spin_unlock_irqrestore(&connlock, flags); | |
881 | ||
7b8631b5 MC |
882 | if (transport->destroy_conn) |
883 | transport->destroy_conn(conn); | |
7b8631b5 | 884 | return 0; |
0896b752 AA |
885 | } |
886 | ||
fd7255f5 MC |
887 | static int |
888 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
889 | { | |
890 | char *data = (char*)ev + sizeof(*ev); | |
891 | struct iscsi_cls_conn *conn; | |
892 | struct iscsi_cls_session *session; | |
a54a52ca | 893 | int err = 0, value = 0; |
fd7255f5 MC |
894 | |
895 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
896 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
897 | if (!conn || !session) | |
898 | return -EINVAL; | |
899 | ||
900 | switch (ev->u.set_param.param) { | |
30a6c652 | 901 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 902 | sscanf(data, "%d", &value); |
30a6c652 MC |
903 | if (value != 0) |
904 | session->recovery_tmo = value; | |
905 | break; | |
fd7255f5 | 906 | default: |
a54a52ca MC |
907 | err = transport->set_param(conn, ev->u.set_param.param, |
908 | data, ev->u.set_param.len); | |
fd7255f5 MC |
909 | } |
910 | ||
911 | return err; | |
912 | } | |
913 | ||
264faaaa OG |
914 | static int |
915 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
916 | struct iscsi_uevent *ev, int msg_type) | |
917 | { | |
918 | struct sockaddr *dst_addr; | |
919 | int rc = 0; | |
920 | ||
921 | switch (msg_type) { | |
922 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: | |
923 | if (!transport->ep_connect) | |
924 | return -EINVAL; | |
925 | ||
926 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
927 | rc = transport->ep_connect(dst_addr, | |
928 | ev->u.ep_connect.non_blocking, | |
929 | &ev->r.ep_connect_ret.handle); | |
930 | break; | |
931 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
932 | if (!transport->ep_poll) | |
933 | return -EINVAL; | |
934 | ||
935 | ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle, | |
936 | ev->u.ep_poll.timeout_ms); | |
937 | break; | |
938 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
939 | if (!transport->ep_disconnect) | |
940 | return -EINVAL; | |
941 | ||
942 | transport->ep_disconnect(ev->u.ep_disconnect.ep_handle); | |
943 | break; | |
944 | } | |
945 | return rc; | |
946 | } | |
947 | ||
01cb225d MC |
948 | static int |
949 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
950 | struct iscsi_uevent *ev) | |
951 | { | |
2174a04e | 952 | struct Scsi_Host *shost; |
01cb225d | 953 | struct sockaddr *dst_addr; |
2174a04e | 954 | int err; |
01cb225d MC |
955 | |
956 | if (!transport->tgt_dscvr) | |
957 | return -EINVAL; | |
958 | ||
2174a04e MC |
959 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
960 | if (IS_ERR(shost)) { | |
961 | printk(KERN_ERR "target discovery could not find host no %u\n", | |
962 | ev->u.tgt_dscvr.host_no); | |
963 | return -ENODEV; | |
964 | } | |
965 | ||
966 | ||
01cb225d | 967 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
968 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
969 | ev->u.tgt_dscvr.enable, dst_addr); | |
970 | scsi_host_put(shost); | |
971 | return err; | |
01cb225d MC |
972 | } |
973 | ||
1d9bf13a MC |
974 | static int |
975 | iscsi_set_host_param(struct iscsi_transport *transport, | |
976 | struct iscsi_uevent *ev) | |
977 | { | |
978 | char *data = (char*)ev + sizeof(*ev); | |
979 | struct Scsi_Host *shost; | |
980 | int err; | |
981 | ||
982 | if (!transport->set_host_param) | |
983 | return -ENOSYS; | |
984 | ||
985 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
986 | if (IS_ERR(shost)) { | |
987 | printk(KERN_ERR "set_host_param could not find host no %u\n", | |
988 | ev->u.set_host_param.host_no); | |
989 | return -ENODEV; | |
990 | } | |
991 | ||
992 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
993 | data, ev->u.set_host_param.len); | |
994 | scsi_host_put(shost); | |
995 | return err; | |
996 | } | |
997 | ||
0896b752 AA |
998 | static int |
999 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) | |
1000 | { | |
1001 | int err = 0; | |
1002 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1003 | struct iscsi_transport *transport = NULL; | |
1004 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1005 | struct iscsi_cls_session *session; |
1006 | struct iscsi_cls_conn *conn; | |
7996a778 | 1007 | unsigned long flags; |
0896b752 | 1008 | |
0896b752 AA |
1009 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1010 | if (!priv) | |
1011 | return -EINVAL; | |
1012 | transport = priv->iscsi_transport; | |
1013 | ||
7b7232f3 MC |
1014 | if (!try_module_get(transport->owner)) |
1015 | return -EINVAL; | |
1016 | ||
790f39a2 MC |
1017 | priv->daemon_pid = NETLINK_CREDS(skb)->pid; |
1018 | ||
0896b752 AA |
1019 | switch (nlh->nlmsg_type) { |
1020 | case ISCSI_UEVENT_CREATE_SESSION: | |
1021 | err = iscsi_if_create_session(priv, ev); | |
1022 | break; | |
1023 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1024 | session = iscsi_session_lookup(ev->u.d_session.sid); |
7996a778 MC |
1025 | if (session) { |
1026 | spin_lock_irqsave(&sesslock, flags); | |
1027 | list_del(&session->sess_list); | |
1028 | spin_unlock_irqrestore(&sesslock, flags); | |
1029 | ||
7b7232f3 | 1030 | transport->destroy_session(session); |
7996a778 | 1031 | } else |
7b7232f3 | 1032 | err = -EINVAL; |
0896b752 AA |
1033 | break; |
1034 | case ISCSI_UEVENT_CREATE_CONN: | |
1035 | err = iscsi_if_create_conn(transport, ev); | |
1036 | break; | |
1037 | case ISCSI_UEVENT_DESTROY_CONN: | |
1038 | err = iscsi_if_destroy_conn(transport, ev); | |
1039 | break; | |
1040 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1041 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1042 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 MC |
1043 | |
1044 | if (session && conn) | |
1045 | ev->r.retcode = transport->bind_conn(session, conn, | |
264faaaa | 1046 | ev->u.b_conn.transport_eph, |
7b7232f3 MC |
1047 | ev->u.b_conn.is_leading); |
1048 | else | |
1049 | err = -EINVAL; | |
0896b752 AA |
1050 | break; |
1051 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1052 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1053 | break; |
1054 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1055 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1056 | if (conn) |
1057 | ev->r.retcode = transport->start_conn(conn); | |
1058 | else | |
1059 | err = -EINVAL; | |
0896b752 AA |
1060 | break; |
1061 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1062 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1063 | if (conn) |
1064 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1065 | else | |
1066 | err = -EINVAL; | |
0896b752 AA |
1067 | break; |
1068 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1069 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1070 | if (conn) |
1071 | ev->r.retcode = transport->send_pdu(conn, | |
1072 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1073 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1074 | ev->u.send_pdu.data_size); | |
1075 | else | |
1076 | err = -EINVAL; | |
0896b752 AA |
1077 | break; |
1078 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1079 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1080 | break; |
264faaaa OG |
1081 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1082 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1083 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1084 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); | |
1085 | break; | |
01cb225d MC |
1086 | case ISCSI_UEVENT_TGT_DSCVR: |
1087 | err = iscsi_tgt_dscvr(transport, ev); | |
1088 | break; | |
1d9bf13a MC |
1089 | case ISCSI_UEVENT_SET_HOST_PARAM: |
1090 | err = iscsi_set_host_param(transport, ev); | |
1091 | break; | |
0896b752 | 1092 | default: |
1d9bf13a | 1093 | err = -ENOSYS; |
0896b752 AA |
1094 | break; |
1095 | } | |
1096 | ||
7b7232f3 | 1097 | module_put(transport->owner); |
0896b752 AA |
1098 | return err; |
1099 | } | |
1100 | ||
b5c7a12d | 1101 | /* |
cd40b7d3 DL |
1102 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
1103 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 1104 | */ |
0896b752 | 1105 | static void |
cd40b7d3 | 1106 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 1107 | { |
0b950672 | 1108 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
1109 | while (skb->len >= NLMSG_SPACE(0)) { |
1110 | int err; | |
1111 | uint32_t rlen; | |
1112 | struct nlmsghdr *nlh; | |
1113 | struct iscsi_uevent *ev; | |
1114 | ||
1115 | nlh = nlmsg_hdr(skb); | |
1116 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
1117 | skb->len < nlh->nlmsg_len) { | |
1118 | break; | |
ee7f8e40 | 1119 | } |
ee7f8e40 | 1120 | |
cd40b7d3 DL |
1121 | ev = NLMSG_DATA(nlh); |
1122 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1123 | if (rlen > skb->len) | |
1124 | rlen = skb->len; | |
0896b752 | 1125 | |
cd40b7d3 DL |
1126 | err = iscsi_if_recv_msg(skb, nlh); |
1127 | if (err) { | |
1128 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1129 | ev->iferror = err; | |
0896b752 | 1130 | } |
cd40b7d3 DL |
1131 | do { |
1132 | /* | |
1133 | * special case for GET_STATS: | |
1134 | * on success - sending reply and stats from | |
1135 | * inside of if_recv_msg(), | |
1136 | * on error - fall through. | |
1137 | */ | |
1138 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1139 | break; | |
1140 | err = iscsi_if_send_reply( | |
1141 | NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq, | |
1142 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); | |
1143 | } while (err < 0 && err != -ECONNREFUSED); | |
1144 | skb_pull(skb, rlen); | |
0896b752 | 1145 | } |
0b950672 | 1146 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1147 | } |
1da177e4 | 1148 | |
7b8631b5 MC |
1149 | #define iscsi_cdev_to_conn(_cdev) \ |
1150 | iscsi_dev_to_conn(_cdev->dev) | |
1151 | ||
fd7255f5 MC |
1152 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
1153 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
1154 | __ATTR(_name,_mode,_show,_store) | |
1155 | ||
1da177e4 | 1156 | /* |
0896b752 | 1157 | * iSCSI connection attrs |
1da177e4 | 1158 | */ |
a54a52ca | 1159 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1160 | static ssize_t \ |
a54a52ca | 1161 | show_conn_param_##param(struct class_device *cdev, char *buf) \ |
0896b752 | 1162 | { \ |
7b8631b5 MC |
1163 | struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \ |
1164 | struct iscsi_transport *t = conn->transport; \ | |
a54a52ca | 1165 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1166 | } |
1167 | ||
a54a52ca MC |
1168 | #define iscsi_conn_attr(field, param) \ |
1169 | iscsi_conn_attr_show(param) \ | |
1170 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1171 | NULL); |
0896b752 | 1172 | |
a54a52ca MC |
1173 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1174 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1175 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1176 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1177 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1178 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1179 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
1180 | iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT); | |
1181 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); | |
1182 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
1183 | iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
1da177e4 | 1184 | |
7b8631b5 MC |
1185 | #define iscsi_cdev_to_session(_cdev) \ |
1186 | iscsi_dev_to_session(_cdev->dev) | |
1187 | ||
1da177e4 | 1188 | /* |
0896b752 | 1189 | * iSCSI session attrs |
1da177e4 | 1190 | */ |
b2c64167 | 1191 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 1192 | static ssize_t \ |
a54a52ca | 1193 | show_session_param_##param(struct class_device *cdev, char *buf) \ |
fd7255f5 MC |
1194 | { \ |
1195 | struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \ | |
1196 | struct iscsi_transport *t = session->transport; \ | |
b2c64167 MC |
1197 | \ |
1198 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
1199 | return -EACCES; \ | |
a54a52ca | 1200 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
1201 | } |
1202 | ||
b2c64167 MC |
1203 | #define iscsi_session_attr(field, param, perm) \ |
1204 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 1205 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 MC |
1206 | NULL); |
1207 | ||
b2c64167 MC |
1208 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
1209 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
1210 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
1211 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
1212 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
1213 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
1214 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
1215 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
1216 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
1217 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
1218 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
1219 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
1220 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
1221 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
843c0a8a | 1222 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 1); |
1da177e4 | 1223 | |
fd7255f5 MC |
1224 | #define iscsi_priv_session_attr_show(field, format) \ |
1225 | static ssize_t \ | |
a54a52ca | 1226 | show_priv_session_##field(struct class_device *cdev, char *buf) \ |
fd7255f5 | 1227 | { \ |
a54a52ca | 1228 | struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev);\ |
fd7255f5 MC |
1229 | return sprintf(buf, format"\n", session->field); \ |
1230 | } | |
1231 | ||
1232 | #define iscsi_priv_session_attr(field, format) \ | |
1233 | iscsi_priv_session_attr_show(field, format) \ | |
1234 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \ | |
1235 | NULL) | |
30a6c652 | 1236 | iscsi_priv_session_attr(recovery_tmo, "%d"); |
fd7255f5 | 1237 | |
1819dc81 MC |
1238 | /* |
1239 | * iSCSI host attrs | |
1240 | */ | |
1241 | #define iscsi_host_attr_show(param) \ | |
1242 | static ssize_t \ | |
1243 | show_host_param_##param(struct class_device *cdev, char *buf) \ | |
1244 | { \ | |
1245 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
1246 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ | |
1247 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
1248 | } | |
1249 | ||
1250 | #define iscsi_host_attr(field, param) \ | |
1251 | iscsi_host_attr_show(param) \ | |
1252 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
1253 | NULL); | |
1254 | ||
d8196ed2 | 1255 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 1256 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 1257 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 1258 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 1259 | |
fd7255f5 MC |
1260 | #define SETUP_PRIV_SESSION_RD_ATTR(field) \ |
1261 | do { \ | |
1262 | priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \ | |
1263 | count++; \ | |
1264 | } while (0) | |
1265 | ||
a54a52ca | 1266 | |
fd7255f5 MC |
1267 | #define SETUP_SESSION_RD_ATTR(field, param_flag) \ |
1268 | do { \ | |
1269 | if (tt->param_mask & param_flag) { \ | |
1270 | priv->session_attrs[count] = &class_device_attr_sess_##field; \ | |
1da177e4 | 1271 | count++; \ |
fd7255f5 MC |
1272 | } \ |
1273 | } while (0) | |
1274 | ||
fd7255f5 MC |
1275 | #define SETUP_CONN_RD_ATTR(field, param_flag) \ |
1276 | do { \ | |
1277 | if (tt->param_mask & param_flag) { \ | |
1278 | priv->conn_attrs[count] = &class_device_attr_conn_##field; \ | |
1279 | count++; \ | |
1280 | } \ | |
1281 | } while (0) | |
1da177e4 | 1282 | |
1819dc81 MC |
1283 | #define SETUP_HOST_RD_ATTR(field, param_flag) \ |
1284 | do { \ | |
1285 | if (tt->host_param_mask & param_flag) { \ | |
1286 | priv->host_attrs[count] = &class_device_attr_host_##field; \ | |
1287 | count++; \ | |
1288 | } \ | |
1289 | } while (0) | |
1290 | ||
0896b752 AA |
1291 | static int iscsi_session_match(struct attribute_container *cont, |
1292 | struct device *dev) | |
1da177e4 | 1293 | { |
7b8631b5 | 1294 | struct iscsi_cls_session *session; |
1da177e4 | 1295 | struct Scsi_Host *shost; |
0896b752 AA |
1296 | struct iscsi_internal *priv; |
1297 | ||
1298 | if (!iscsi_is_session_dev(dev)) | |
1299 | return 0; | |
1da177e4 | 1300 | |
7b8631b5 MC |
1301 | session = iscsi_dev_to_session(dev); |
1302 | shost = iscsi_session_to_shost(session); | |
0896b752 | 1303 | if (!shost->transportt) |
1da177e4 LT |
1304 | return 0; |
1305 | ||
0896b752 AA |
1306 | priv = to_iscsi_internal(shost->transportt); |
1307 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
1308 | return 0; |
1309 | ||
0896b752 | 1310 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
1311 | } |
1312 | ||
0896b752 AA |
1313 | static int iscsi_conn_match(struct attribute_container *cont, |
1314 | struct device *dev) | |
1315 | { | |
7b8631b5 MC |
1316 | struct iscsi_cls_session *session; |
1317 | struct iscsi_cls_conn *conn; | |
1da177e4 | 1318 | struct Scsi_Host *shost; |
0896b752 | 1319 | struct iscsi_internal *priv; |
1da177e4 | 1320 | |
0896b752 | 1321 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
1322 | return 0; |
1323 | ||
7b8631b5 MC |
1324 | conn = iscsi_dev_to_conn(dev); |
1325 | session = iscsi_dev_to_session(conn->dev.parent); | |
1326 | shost = iscsi_session_to_shost(session); | |
1327 | ||
0896b752 | 1328 | if (!shost->transportt) |
1da177e4 LT |
1329 | return 0; |
1330 | ||
0896b752 AA |
1331 | priv = to_iscsi_internal(shost->transportt); |
1332 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
1333 | return 0; | |
1da177e4 | 1334 | |
0896b752 AA |
1335 | return &priv->conn_cont.ac == cont; |
1336 | } | |
1337 | ||
30a6c652 MC |
1338 | static int iscsi_host_match(struct attribute_container *cont, |
1339 | struct device *dev) | |
1340 | { | |
1341 | struct Scsi_Host *shost; | |
1342 | struct iscsi_internal *priv; | |
1343 | ||
1344 | if (!scsi_is_host_device(dev)) | |
1345 | return 0; | |
1346 | ||
1347 | shost = dev_to_shost(dev); | |
1348 | if (!shost->transportt || | |
1349 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
1350 | return 0; | |
1351 | ||
1352 | priv = to_iscsi_internal(shost->transportt); | |
1353 | return &priv->t.host_attrs.ac == cont; | |
1354 | } | |
1355 | ||
7b8631b5 MC |
1356 | struct scsi_transport_template * |
1357 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
1358 | { |
1359 | struct iscsi_internal *priv; | |
1360 | unsigned long flags; | |
1361 | int count = 0, err; | |
1362 | ||
1363 | BUG_ON(!tt); | |
1364 | ||
1365 | priv = iscsi_if_transport_lookup(tt); | |
1366 | if (priv) | |
7b8631b5 | 1367 | return NULL; |
0896b752 | 1368 | |
24669f75 | 1369 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 1370 | if (!priv) |
7b8631b5 | 1371 | return NULL; |
0896b752 | 1372 | INIT_LIST_HEAD(&priv->list); |
53cb8a1f | 1373 | priv->daemon_pid = -1; |
0896b752 | 1374 | priv->iscsi_transport = tt; |
30a6c652 | 1375 | priv->t.user_scan = iscsi_user_scan; |
0896b752 AA |
1376 | |
1377 | priv->cdev.class = &iscsi_transport_class; | |
1378 | snprintf(priv->cdev.class_id, BUS_ID_SIZE, "%s", tt->name); | |
1379 | err = class_device_register(&priv->cdev); | |
1380 | if (err) | |
1381 | goto free_priv; | |
1382 | ||
1383 | err = sysfs_create_group(&priv->cdev.kobj, &iscsi_transport_group); | |
1384 | if (err) | |
1385 | goto unregister_cdev; | |
1386 | ||
30a6c652 MC |
1387 | /* host parameters */ |
1388 | priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; | |
1389 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; | |
1390 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
1391 | priv->t.host_size = sizeof(struct iscsi_host); | |
30a6c652 MC |
1392 | transport_container_register(&priv->t.host_attrs); |
1393 | ||
d8196ed2 | 1394 | SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); |
22236961 | 1395 | SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS); |
1819dc81 | 1396 | SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS); |
8ad5781a | 1397 | SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME); |
1819dc81 MC |
1398 | BUG_ON(count > ISCSI_HOST_ATTRS); |
1399 | priv->host_attrs[count] = NULL; | |
1400 | count = 0; | |
1401 | ||
0896b752 AA |
1402 | /* connection parameters */ |
1403 | priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; | |
1404 | priv->conn_cont.ac.class = &iscsi_connection_class.class; | |
1405 | priv->conn_cont.ac.match = iscsi_conn_match; | |
1406 | transport_container_register(&priv->conn_cont); | |
1da177e4 | 1407 | |
fd7255f5 MC |
1408 | SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH); |
1409 | SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH); | |
1410 | SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN); | |
1411 | SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN); | |
1412 | SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN); | |
1413 | SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN); | |
1414 | SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS); | |
1415 | SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT); | |
8d2860b3 | 1416 | SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN); |
a54a52ca MC |
1417 | SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS); |
1418 | SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT); | |
0896b752 AA |
1419 | |
1420 | BUG_ON(count > ISCSI_CONN_ATTRS); | |
1421 | priv->conn_attrs[count] = NULL; | |
1da177e4 | 1422 | count = 0; |
1da177e4 | 1423 | |
0896b752 AA |
1424 | /* session parameters */ |
1425 | priv->session_cont.ac.attrs = &priv->session_attrs[0]; | |
1426 | priv->session_cont.ac.class = &iscsi_session_class.class; | |
1427 | priv->session_cont.ac.match = iscsi_session_match; | |
1428 | transport_container_register(&priv->session_cont); | |
1429 | ||
fd7255f5 MC |
1430 | SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN); |
1431 | SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T); | |
1432 | SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN); | |
1433 | SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST); | |
1434 | SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST); | |
1435 | SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN); | |
1436 | SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN); | |
1437 | SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL); | |
a54a52ca MC |
1438 | SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME); |
1439 | SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT); | |
b2c64167 MC |
1440 | SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME); |
1441 | SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN); | |
1442 | SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD); | |
1443 | SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN); | |
843c0a8a | 1444 | SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); |
30a6c652 | 1445 | SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); |
fd7255f5 | 1446 | |
0896b752 AA |
1447 | BUG_ON(count > ISCSI_SESSION_ATTRS); |
1448 | priv->session_attrs[count] = NULL; | |
1449 | ||
1450 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1451 | list_add(&priv->list, &iscsi_transports); | |
1452 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1453 | ||
1454 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 1455 | return &priv->t; |
1da177e4 | 1456 | |
0896b752 AA |
1457 | unregister_cdev: |
1458 | class_device_unregister(&priv->cdev); | |
1459 | free_priv: | |
1460 | kfree(priv); | |
7b8631b5 | 1461 | return NULL; |
1da177e4 | 1462 | } |
0896b752 AA |
1463 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
1464 | ||
1465 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
1466 | { | |
1467 | struct iscsi_internal *priv; | |
1468 | unsigned long flags; | |
1469 | ||
1470 | BUG_ON(!tt); | |
1471 | ||
0b950672 | 1472 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
1473 | |
1474 | priv = iscsi_if_transport_lookup(tt); | |
1475 | BUG_ON (!priv); | |
1476 | ||
0896b752 AA |
1477 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
1478 | list_del(&priv->list); | |
1479 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1480 | ||
1481 | transport_container_unregister(&priv->conn_cont); | |
1482 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 1483 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 AA |
1484 | |
1485 | sysfs_remove_group(&priv->cdev.kobj, &iscsi_transport_group); | |
1486 | class_device_unregister(&priv->cdev); | |
0b950672 | 1487 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 1488 | |
0896b752 AA |
1489 | return 0; |
1490 | } | |
1491 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 1492 | |
1da177e4 LT |
1493 | static __init int iscsi_transport_init(void) |
1494 | { | |
0896b752 | 1495 | int err; |
1da177e4 | 1496 | |
09492605 | 1497 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
1498 | ISCSI_TRANSPORT_VERSION); |
1499 | ||
41be1444 MC |
1500 | atomic_set(&iscsi_session_nr, 0); |
1501 | ||
0896b752 | 1502 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
1503 | if (err) |
1504 | return err; | |
0896b752 | 1505 | |
30a6c652 | 1506 | err = transport_class_register(&iscsi_host_class); |
0896b752 AA |
1507 | if (err) |
1508 | goto unregister_transport_class; | |
1509 | ||
30a6c652 MC |
1510 | err = transport_class_register(&iscsi_connection_class); |
1511 | if (err) | |
1512 | goto unregister_host_class; | |
1513 | ||
0896b752 AA |
1514 | err = transport_class_register(&iscsi_session_class); |
1515 | if (err) | |
1516 | goto unregister_conn_class; | |
1517 | ||
b4b51029 | 1518 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL, |
7b8631b5 | 1519 | THIS_MODULE); |
0896b752 AA |
1520 | if (!nls) { |
1521 | err = -ENOBUFS; | |
43a145a3 | 1522 | goto unregister_session_class; |
0896b752 AA |
1523 | } |
1524 | ||
d8bf541e MC |
1525 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
1526 | if (!iscsi_eh_timer_workq) | |
1527 | goto release_nls; | |
1528 | ||
43a145a3 | 1529 | return 0; |
0896b752 | 1530 | |
d8bf541e MC |
1531 | release_nls: |
1532 | sock_release(nls->sk_socket); | |
0896b752 AA |
1533 | unregister_session_class: |
1534 | transport_class_unregister(&iscsi_session_class); | |
1535 | unregister_conn_class: | |
1536 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
1537 | unregister_host_class: |
1538 | transport_class_unregister(&iscsi_host_class); | |
0896b752 AA |
1539 | unregister_transport_class: |
1540 | class_unregister(&iscsi_transport_class); | |
1541 | return err; | |
1da177e4 LT |
1542 | } |
1543 | ||
1544 | static void __exit iscsi_transport_exit(void) | |
1545 | { | |
d8bf541e | 1546 | destroy_workqueue(iscsi_eh_timer_workq); |
0896b752 | 1547 | sock_release(nls->sk_socket); |
0896b752 AA |
1548 | transport_class_unregister(&iscsi_connection_class); |
1549 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 1550 | transport_class_unregister(&iscsi_host_class); |
0896b752 | 1551 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
1552 | } |
1553 | ||
1554 | module_init(iscsi_transport_init); | |
1555 | module_exit(iscsi_transport_exit); | |
1556 | ||
0896b752 AA |
1557 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
1558 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
1559 | "Alex Aizman <itn780@yahoo.com>"); | |
1560 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 1561 | MODULE_LICENSE("GPL"); |
f4246b33 | 1562 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |