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 | |
6eabafbe | 33 | #define ISCSI_SESSION_ATTRS 19 |
c238c3bb | 34 | #define ISCSI_CONN_ATTRS 13 |
d8196ed2 | 35 | #define ISCSI_HOST_ATTRS 4 |
31ed0bf4 | 36 | #define ISCSI_TRANSPORT_VERSION "2.0-869" |
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; | |
ee959b00 | 43 | struct device dev; |
30a6c652 | 44 | |
ee959b00 | 45 | struct device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1]; |
0896b752 | 46 | struct transport_container conn_cont; |
ee959b00 | 47 | struct device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1]; |
0896b752 | 48 | struct transport_container session_cont; |
ee959b00 | 49 | struct 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 | ||
ee959b00 TJ |
66 | #define dev_to_iscsi_internal(_dev) \ |
67 | container_of(_dev, struct iscsi_internal, dev) | |
0896b752 | 68 | |
ee959b00 | 69 | static void iscsi_transport_release(struct device *dev) |
0896b752 | 70 | { |
ee959b00 | 71 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
0896b752 AA |
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", | |
ee959b00 | 81 | .dev_release = iscsi_transport_release, |
0896b752 AA |
82 | }; |
83 | ||
84 | static ssize_t | |
ee959b00 TJ |
85 | show_transport_handle(struct device *dev, struct device_attribute *attr, |
86 | char *buf) | |
0896b752 | 87 | { |
ee959b00 | 88 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
762e2bfa | 89 | return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); |
0896b752 | 90 | } |
ee959b00 | 91 | static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); |
0896b752 AA |
92 | |
93 | #define show_transport_attr(name, format) \ | |
94 | static ssize_t \ | |
ee959b00 TJ |
95 | show_transport_##name(struct device *dev, \ |
96 | struct device_attribute *attr,char *buf) \ | |
0896b752 | 97 | { \ |
ee959b00 | 98 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ |
0896b752 AA |
99 | return sprintf(buf, format"\n", priv->iscsi_transport->name); \ |
100 | } \ | |
ee959b00 | 101 | static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); |
0896b752 AA |
102 | |
103 | show_transport_attr(caps, "0x%x"); | |
0896b752 AA |
104 | |
105 | static struct attribute *iscsi_transport_attrs[] = { | |
ee959b00 TJ |
106 | &dev_attr_handle.attr, |
107 | &dev_attr_caps.attr, | |
0896b752 AA |
108 | NULL, |
109 | }; | |
110 | ||
111 | static struct attribute_group iscsi_transport_group = { | |
112 | .attrs = iscsi_transport_attrs, | |
113 | }; | |
114 | ||
30a6c652 | 115 | static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
ee959b00 | 116 | struct device *cdev) |
30a6c652 MC |
117 | { |
118 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 119 | struct iscsi_cls_host *ihost = shost->shost_data; |
30a6c652 MC |
120 | |
121 | memset(ihost, 0, sizeof(*ihost)); | |
122 | INIT_LIST_HEAD(&ihost->sessions); | |
123 | mutex_init(&ihost->mutex); | |
8aae18ad | 124 | atomic_set(&ihost->nr_scans, 0); |
26974789 | 125 | |
bd976f62 | 126 | snprintf(ihost->scan_workq_name, KOBJ_NAME_LEN, "iscsi_scan_%d", |
26974789 | 127 | shost->host_no); |
bd976f62 MC |
128 | ihost->scan_workq = create_singlethread_workqueue( |
129 | ihost->scan_workq_name); | |
130 | if (!ihost->scan_workq) | |
26974789 MC |
131 | return -ENOMEM; |
132 | return 0; | |
133 | } | |
134 | ||
135 | static int iscsi_remove_host(struct transport_container *tc, struct device *dev, | |
ee959b00 | 136 | struct device *cdev) |
26974789 MC |
137 | { |
138 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 139 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 | 140 | |
bd976f62 | 141 | destroy_workqueue(ihost->scan_workq); |
30a6c652 MC |
142 | return 0; |
143 | } | |
144 | ||
145 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
146 | "iscsi_host", | |
147 | iscsi_setup_host, | |
26974789 | 148 | iscsi_remove_host, |
30a6c652 MC |
149 | NULL); |
150 | ||
0896b752 AA |
151 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
152 | "iscsi_session", | |
1da177e4 LT |
153 | NULL, |
154 | NULL, | |
155 | NULL); | |
156 | ||
0896b752 AA |
157 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
158 | "iscsi_connection", | |
1da177e4 LT |
159 | NULL, |
160 | NULL, | |
161 | NULL); | |
0896b752 AA |
162 | |
163 | static struct sock *nls; | |
0b950672 | 164 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 165 | |
7b7232f3 MC |
166 | static LIST_HEAD(sesslist); |
167 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
168 | static LIST_HEAD(connlist); |
169 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 170 | |
b5c7a12d MC |
171 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
172 | { | |
173 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
174 | return sess->sid; | |
175 | } | |
176 | ||
177 | /* | |
178 | * Returns the matching session to a given sid | |
179 | */ | |
180 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
181 | { |
182 | unsigned long flags; | |
183 | struct iscsi_cls_session *sess; | |
184 | ||
185 | spin_lock_irqsave(&sesslock, flags); | |
186 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 187 | if (sess->sid == sid) { |
7b7232f3 MC |
188 | spin_unlock_irqrestore(&sesslock, flags); |
189 | return sess; | |
190 | } | |
191 | } | |
192 | spin_unlock_irqrestore(&sesslock, flags); | |
193 | return NULL; | |
194 | } | |
195 | ||
b5c7a12d MC |
196 | /* |
197 | * Returns the matching connection to a given sid / cid tuple | |
198 | */ | |
199 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
200 | { |
201 | unsigned long flags; | |
202 | struct iscsi_cls_conn *conn; | |
203 | ||
204 | spin_lock_irqsave(&connlock, flags); | |
205 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 206 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
207 | spin_unlock_irqrestore(&connlock, flags); |
208 | return conn; | |
209 | } | |
210 | } | |
211 | spin_unlock_irqrestore(&connlock, flags); | |
212 | return NULL; | |
213 | } | |
214 | ||
7b8631b5 MC |
215 | /* |
216 | * The following functions can be used by LLDs that allocate | |
217 | * their own scsi_hosts or by software iscsi LLDs | |
218 | */ | |
6eabafbe MC |
219 | static struct { |
220 | int value; | |
221 | char *name; | |
222 | } iscsi_session_state_names[] = { | |
223 | { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, | |
224 | { ISCSI_SESSION_FAILED, "FAILED" }, | |
225 | { ISCSI_SESSION_FREE, "FREE" }, | |
226 | }; | |
227 | ||
3b0f208a | 228 | static const char *iscsi_session_state_name(int state) |
6eabafbe MC |
229 | { |
230 | int i; | |
231 | char *name = NULL; | |
232 | ||
233 | for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { | |
234 | if (iscsi_session_state_names[i].value == state) { | |
235 | name = iscsi_session_state_names[i].name; | |
236 | break; | |
237 | } | |
238 | } | |
239 | return name; | |
240 | } | |
241 | ||
242 | int iscsi_session_chkready(struct iscsi_cls_session *session) | |
243 | { | |
244 | unsigned long flags; | |
245 | int err; | |
246 | ||
247 | spin_lock_irqsave(&session->lock, flags); | |
248 | switch (session->state) { | |
249 | case ISCSI_SESSION_LOGGED_IN: | |
250 | err = 0; | |
251 | break; | |
252 | case ISCSI_SESSION_FAILED: | |
253 | err = DID_IMM_RETRY << 16; | |
254 | break; | |
255 | case ISCSI_SESSION_FREE: | |
256 | err = DID_NO_CONNECT << 16; | |
257 | break; | |
258 | default: | |
259 | err = DID_NO_CONNECT << 16; | |
260 | break; | |
261 | } | |
262 | spin_unlock_irqrestore(&session->lock, flags); | |
263 | return err; | |
264 | } | |
265 | EXPORT_SYMBOL_GPL(iscsi_session_chkready); | |
266 | ||
7b8631b5 MC |
267 | static void iscsi_session_release(struct device *dev) |
268 | { | |
269 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 270 | struct Scsi_Host *shost; |
0896b752 | 271 | |
7b8631b5 MC |
272 | shost = iscsi_session_to_shost(session); |
273 | scsi_host_put(shost); | |
274 | kfree(session); | |
7b8631b5 | 275 | } |
0896b752 | 276 | |
7b8631b5 MC |
277 | static int iscsi_is_session_dev(const struct device *dev) |
278 | { | |
279 | return dev->release == iscsi_session_release; | |
280 | } | |
0896b752 | 281 | |
a4804cd6 MC |
282 | static int iscsi_iter_session_fn(struct device *dev, void *data) |
283 | { | |
284 | void (* fn) (struct iscsi_cls_session *) = data; | |
285 | ||
286 | if (!iscsi_is_session_dev(dev)) | |
287 | return 0; | |
288 | fn(iscsi_dev_to_session(dev)); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | void iscsi_host_for_each_session(struct Scsi_Host *shost, | |
293 | void (*fn)(struct iscsi_cls_session *)) | |
294 | { | |
295 | device_for_each_child(&shost->shost_gendev, fn, | |
296 | iscsi_iter_session_fn); | |
297 | } | |
298 | EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); | |
299 | ||
8aae18ad MC |
300 | /** |
301 | * iscsi_scan_finished - helper to report when running scans are done | |
302 | * @shost: scsi host | |
303 | * @time: scan run time | |
304 | * | |
305 | * This function can be used by drives like qla4xxx to report to the scsi | |
306 | * layer when the scans it kicked off at module load time are done. | |
307 | */ | |
308 | int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
309 | { | |
32c6e1b9 | 310 | struct iscsi_cls_host *ihost = shost->shost_data; |
8aae18ad MC |
311 | /* |
312 | * qla4xxx will have kicked off some session unblocks before calling | |
313 | * scsi_scan_host, so just wait for them to complete. | |
314 | */ | |
315 | return !atomic_read(&ihost->nr_scans); | |
316 | } | |
317 | EXPORT_SYMBOL_GPL(iscsi_scan_finished); | |
318 | ||
30a6c652 MC |
319 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
320 | uint id, uint lun) | |
321 | { | |
32c6e1b9 | 322 | struct iscsi_cls_host *ihost = shost->shost_data; |
30a6c652 MC |
323 | struct iscsi_cls_session *session; |
324 | ||
325 | mutex_lock(&ihost->mutex); | |
326 | list_for_each_entry(session, &ihost->sessions, host_list) { | |
e6f3b63f | 327 | if ((channel == SCAN_WILD_CARD || channel == 0) && |
30a6c652 | 328 | (id == SCAN_WILD_CARD || id == session->target_id)) |
e6f3b63f | 329 | scsi_scan_target(&session->dev, 0, |
30a6c652 MC |
330 | session->target_id, lun, 1); |
331 | } | |
332 | mutex_unlock(&ihost->mutex); | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
bd976f62 MC |
337 | static void iscsi_scan_session(struct work_struct *work) |
338 | { | |
339 | struct iscsi_cls_session *session = | |
340 | container_of(work, struct iscsi_cls_session, scan_work); | |
8aae18ad | 341 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 342 | struct iscsi_cls_host *ihost = shost->shost_data; |
bd976f62 MC |
343 | unsigned long flags; |
344 | ||
345 | spin_lock_irqsave(&session->lock, flags); | |
346 | if (session->state != ISCSI_SESSION_LOGGED_IN) { | |
347 | spin_unlock_irqrestore(&session->lock, flags); | |
8aae18ad | 348 | goto done; |
bd976f62 MC |
349 | } |
350 | spin_unlock_irqrestore(&session->lock, flags); | |
351 | ||
352 | scsi_scan_target(&session->dev, 0, session->target_id, | |
353 | SCAN_WILD_CARD, 1); | |
8aae18ad MC |
354 | done: |
355 | atomic_dec(&ihost->nr_scans); | |
bd976f62 MC |
356 | } |
357 | ||
c4028958 | 358 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 359 | { |
c4028958 DH |
360 | struct iscsi_cls_session *session = |
361 | container_of(work, struct iscsi_cls_session, | |
362 | recovery_work.work); | |
6eabafbe | 363 | unsigned long flags; |
30a6c652 | 364 | |
322d739d MC |
365 | iscsi_cls_session_printk(KERN_INFO, session, |
366 | "session recovery timed out after %d secs\n", | |
367 | session->recovery_tmo); | |
30a6c652 | 368 | |
6eabafbe MC |
369 | spin_lock_irqsave(&session->lock, flags); |
370 | switch (session->state) { | |
371 | case ISCSI_SESSION_FAILED: | |
372 | session->state = ISCSI_SESSION_FREE; | |
373 | break; | |
374 | case ISCSI_SESSION_LOGGED_IN: | |
375 | case ISCSI_SESSION_FREE: | |
376 | /* we raced with the unblock's flush */ | |
377 | spin_unlock_irqrestore(&session->lock, flags); | |
378 | return; | |
379 | } | |
380 | spin_unlock_irqrestore(&session->lock, flags); | |
381 | ||
30a6c652 MC |
382 | if (session->transport->session_recovery_timedout) |
383 | session->transport->session_recovery_timedout(session); | |
384 | ||
385 | scsi_target_unblock(&session->dev); | |
386 | } | |
387 | ||
45ab33b6 | 388 | static void __iscsi_unblock_session(struct work_struct *work) |
6eabafbe | 389 | { |
45ab33b6 MC |
390 | struct iscsi_cls_session *session = |
391 | container_of(work, struct iscsi_cls_session, | |
392 | unblock_work); | |
bd976f62 | 393 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 394 | struct iscsi_cls_host *ihost = shost->shost_data; |
6eabafbe MC |
395 | unsigned long flags; |
396 | ||
45ab33b6 MC |
397 | /* |
398 | * The recovery and unblock work get run from the same workqueue, | |
399 | * so try to cancel it if it was going to run after this unblock. | |
400 | */ | |
401 | cancel_delayed_work(&session->recovery_work); | |
6eabafbe MC |
402 | spin_lock_irqsave(&session->lock, flags); |
403 | session->state = ISCSI_SESSION_LOGGED_IN; | |
404 | spin_unlock_irqrestore(&session->lock, flags); | |
45ab33b6 MC |
405 | /* start IO */ |
406 | scsi_target_unblock(&session->dev); | |
8aae18ad MC |
407 | /* |
408 | * Only do kernel scanning if the driver is properly hooked into | |
409 | * the async scanning code (drivers like iscsi_tcp do login and | |
410 | * scanning from userspace). | |
411 | */ | |
412 | if (shost->hostt->scan_finished) { | |
413 | if (queue_work(ihost->scan_workq, &session->scan_work)) | |
414 | atomic_inc(&ihost->nr_scans); | |
415 | } | |
6eabafbe | 416 | } |
45ab33b6 MC |
417 | |
418 | /** | |
419 | * iscsi_unblock_session - set a session as logged in and start IO. | |
420 | * @session: iscsi session | |
421 | * | |
422 | * Mark a session as ready to accept IO. | |
423 | */ | |
424 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
425 | { | |
426 | queue_work(iscsi_eh_timer_workq, &session->unblock_work); | |
427 | /* | |
428 | * make sure all the events have completed before tell the driver | |
429 | * it is safe | |
430 | */ | |
431 | flush_workqueue(iscsi_eh_timer_workq); | |
432 | } | |
30a6c652 MC |
433 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
434 | ||
45ab33b6 | 435 | static void __iscsi_block_session(struct work_struct *work) |
30a6c652 | 436 | { |
45ab33b6 MC |
437 | struct iscsi_cls_session *session = |
438 | container_of(work, struct iscsi_cls_session, | |
439 | block_work); | |
6eabafbe MC |
440 | unsigned long flags; |
441 | ||
442 | spin_lock_irqsave(&session->lock, flags); | |
443 | session->state = ISCSI_SESSION_FAILED; | |
444 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 445 | scsi_target_block(&session->dev); |
d8bf541e MC |
446 | queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work, |
447 | session->recovery_tmo * HZ); | |
30a6c652 | 448 | } |
45ab33b6 MC |
449 | |
450 | void iscsi_block_session(struct iscsi_cls_session *session) | |
451 | { | |
452 | queue_work(iscsi_eh_timer_workq, &session->block_work); | |
453 | } | |
30a6c652 MC |
454 | EXPORT_SYMBOL_GPL(iscsi_block_session); |
455 | ||
26974789 MC |
456 | static void __iscsi_unbind_session(struct work_struct *work) |
457 | { | |
458 | struct iscsi_cls_session *session = | |
459 | container_of(work, struct iscsi_cls_session, | |
460 | unbind_work); | |
461 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 462 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 MC |
463 | |
464 | /* Prevent new scans and make sure scanning is not in progress */ | |
465 | mutex_lock(&ihost->mutex); | |
466 | if (list_empty(&session->host_list)) { | |
467 | mutex_unlock(&ihost->mutex); | |
468 | return; | |
469 | } | |
470 | list_del_init(&session->host_list); | |
471 | mutex_unlock(&ihost->mutex); | |
472 | ||
473 | scsi_remove_target(&session->dev); | |
474 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
475 | } | |
476 | ||
477 | static int iscsi_unbind_session(struct iscsi_cls_session *session) | |
478 | { | |
479 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 480 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 | 481 | |
bd976f62 | 482 | return queue_work(ihost->scan_workq, &session->unbind_work); |
26974789 MC |
483 | } |
484 | ||
7b8631b5 | 485 | struct iscsi_cls_session * |
5d91e209 MC |
486 | iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
487 | int dd_size) | |
7b8631b5 MC |
488 | { |
489 | struct iscsi_cls_session *session; | |
7b8631b5 | 490 | |
5d91e209 | 491 | session = kzalloc(sizeof(*session) + dd_size, |
b5c7a12d | 492 | GFP_KERNEL); |
7b8631b5 | 493 | if (!session) |
f53a88da MC |
494 | return NULL; |
495 | ||
7b8631b5 | 496 | session->transport = transport; |
30a6c652 | 497 | session->recovery_tmo = 120; |
6eabafbe | 498 | session->state = ISCSI_SESSION_FREE; |
c4028958 | 499 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 MC |
500 | INIT_LIST_HEAD(&session->host_list); |
501 | INIT_LIST_HEAD(&session->sess_list); | |
45ab33b6 MC |
502 | INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
503 | INIT_WORK(&session->block_work, __iscsi_block_session); | |
26974789 | 504 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
bd976f62 | 505 | INIT_WORK(&session->scan_work, iscsi_scan_session); |
6eabafbe | 506 | spin_lock_init(&session->lock); |
7b8631b5 | 507 | |
6a8a0d36 MC |
508 | /* this is released in the dev's release function */ |
509 | scsi_host_get(shost); | |
8434aa8b MC |
510 | session->dev.parent = &shost->shost_gendev; |
511 | session->dev.release = iscsi_session_release; | |
512 | device_initialize(&session->dev); | |
5d91e209 | 513 | if (dd_size) |
b5c7a12d | 514 | session->dd_data = &session[1]; |
8434aa8b MC |
515 | return session; |
516 | } | |
517 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
518 | ||
6a8a0d36 | 519 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
520 | { |
521 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 522 | struct iscsi_cls_host *ihost; |
26974789 | 523 | unsigned long flags; |
8434aa8b | 524 | int err; |
b5c7a12d | 525 | |
30a6c652 | 526 | ihost = shost->shost_data; |
41be1444 | 527 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
6a8a0d36 | 528 | session->target_id = target_id; |
30a6c652 | 529 | |
b5c7a12d MC |
530 | snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", |
531 | session->sid); | |
8434aa8b | 532 | err = device_add(&session->dev); |
7b8631b5 | 533 | if (err) { |
322d739d MC |
534 | iscsi_cls_session_printk(KERN_ERR, session, |
535 | "could not register session's dev\n"); | |
8434aa8b | 536 | goto release_host; |
7b8631b5 MC |
537 | } |
538 | transport_register_device(&session->dev); | |
539 | ||
26974789 MC |
540 | spin_lock_irqsave(&sesslock, flags); |
541 | list_add(&session->sess_list, &sesslist); | |
542 | spin_unlock_irqrestore(&sesslock, flags); | |
543 | ||
30a6c652 MC |
544 | mutex_lock(&ihost->mutex); |
545 | list_add(&session->host_list, &ihost->sessions); | |
546 | mutex_unlock(&ihost->mutex); | |
26974789 MC |
547 | |
548 | iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); | |
8434aa8b | 549 | return 0; |
30a6c652 | 550 | |
8434aa8b MC |
551 | release_host: |
552 | scsi_host_put(shost); | |
553 | return err; | |
7b8631b5 | 554 | } |
8434aa8b | 555 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
556 | |
557 | /** | |
8434aa8b MC |
558 | * iscsi_create_session - create iscsi class session |
559 | * @shost: scsi host | |
560 | * @transport: iscsi transport | |
5d91e209 | 561 | * @dd_size: private driver data size |
eb44820c | 562 | * @target_id: which target |
7b8631b5 | 563 | * |
8434aa8b | 564 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 565 | */ |
8434aa8b | 566 | struct iscsi_cls_session * |
5d91e209 MC |
567 | iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
568 | int dd_size, unsigned int target_id) | |
8434aa8b MC |
569 | { |
570 | struct iscsi_cls_session *session; | |
571 | ||
5d91e209 | 572 | session = iscsi_alloc_session(shost, transport, dd_size); |
8434aa8b MC |
573 | if (!session) |
574 | return NULL; | |
575 | ||
6a8a0d36 | 576 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
577 | iscsi_free_session(session); |
578 | return NULL; | |
579 | } | |
580 | return session; | |
581 | } | |
582 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
583 | ||
26974789 MC |
584 | static void iscsi_conn_release(struct device *dev) |
585 | { | |
586 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
587 | struct device *parent = conn->dev.parent; | |
588 | ||
589 | kfree(conn); | |
590 | put_device(parent); | |
591 | } | |
592 | ||
593 | static int iscsi_is_conn_dev(const struct device *dev) | |
594 | { | |
595 | return dev->release == iscsi_conn_release; | |
596 | } | |
597 | ||
598 | static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) | |
599 | { | |
600 | if (!iscsi_is_conn_dev(dev)) | |
601 | return 0; | |
602 | return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); | |
603 | } | |
604 | ||
8434aa8b | 605 | void iscsi_remove_session(struct iscsi_cls_session *session) |
7b8631b5 | 606 | { |
30a6c652 | 607 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 608 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 MC |
609 | unsigned long flags; |
610 | int err; | |
611 | ||
612 | spin_lock_irqsave(&sesslock, flags); | |
613 | list_del(&session->sess_list); | |
614 | spin_unlock_irqrestore(&sesslock, flags); | |
30a6c652 | 615 | |
45ab33b6 MC |
616 | /* make sure there are no blocks/unblocks queued */ |
617 | flush_workqueue(iscsi_eh_timer_workq); | |
618 | /* make sure the timedout callout is not running */ | |
619 | if (!cancel_delayed_work(&session->recovery_work)) | |
620 | flush_workqueue(iscsi_eh_timer_workq); | |
26974789 MC |
621 | /* |
622 | * If we are blocked let commands flow again. The lld or iscsi | |
623 | * layer should set up the queuecommand to fail commands. | |
45ab33b6 MC |
624 | * We assume that LLD will not be calling block/unblock while |
625 | * removing the session. | |
26974789 | 626 | */ |
6eabafbe MC |
627 | spin_lock_irqsave(&session->lock, flags); |
628 | session->state = ISCSI_SESSION_FREE; | |
629 | spin_unlock_irqrestore(&session->lock, flags); | |
bd976f62 | 630 | |
45ab33b6 MC |
631 | scsi_target_unblock(&session->dev); |
632 | /* flush running scans then delete devices */ | |
bd976f62 | 633 | flush_workqueue(ihost->scan_workq); |
45ab33b6 | 634 | __iscsi_unbind_session(&session->unbind_work); |
30a6c652 | 635 | |
26974789 MC |
636 | /* hw iscsi may not have removed all connections from session */ |
637 | err = device_for_each_child(&session->dev, NULL, | |
638 | iscsi_iter_destroy_conn_fn); | |
639 | if (err) | |
322d739d MC |
640 | iscsi_cls_session_printk(KERN_ERR, session, |
641 | "Could not delete all connections " | |
642 | "for session. Error %d.\n", err); | |
8434aa8b | 643 | |
7b8631b5 | 644 | transport_unregister_device(&session->dev); |
8434aa8b MC |
645 | device_del(&session->dev); |
646 | } | |
647 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
648 | ||
649 | void iscsi_free_session(struct iscsi_cls_session *session) | |
650 | { | |
26974789 | 651 | iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
8434aa8b | 652 | put_device(&session->dev); |
7b8631b5 | 653 | } |
8434aa8b MC |
654 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
655 | ||
656 | /** | |
657 | * iscsi_destroy_session - destroy iscsi session | |
658 | * @session: iscsi_session | |
659 | * | |
660 | * Can be called by a LLD or iscsi_transport. There must not be | |
661 | * any running connections. | |
eb44820c | 662 | */ |
8434aa8b MC |
663 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
664 | { | |
665 | iscsi_remove_session(session); | |
666 | iscsi_free_session(session); | |
667 | return 0; | |
668 | } | |
7b8631b5 MC |
669 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
670 | ||
7b8631b5 MC |
671 | /** |
672 | * iscsi_create_conn - create iscsi class connection | |
673 | * @session: iscsi cls session | |
5d91e209 | 674 | * @dd_size: private driver data size |
7b8631b5 MC |
675 | * @cid: connection id |
676 | * | |
677 | * This can be called from a LLD or iscsi_transport. The connection | |
678 | * is child of the session so cid must be unique for all connections | |
679 | * on the session. | |
b5c7a12d MC |
680 | * |
681 | * Since we do not support MCS, cid will normally be zero. In some cases | |
682 | * for software iscsi we could be trying to preallocate a connection struct | |
683 | * in which case there could be two connection structs and cid would be | |
684 | * non-zero. | |
eb44820c | 685 | */ |
7b8631b5 | 686 | struct iscsi_cls_conn * |
5d91e209 | 687 | iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) |
7b8631b5 MC |
688 | { |
689 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 | 690 | struct iscsi_cls_conn *conn; |
26974789 | 691 | unsigned long flags; |
7b8631b5 MC |
692 | int err; |
693 | ||
5d91e209 | 694 | conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); |
7b8631b5 MC |
695 | if (!conn) |
696 | return NULL; | |
5d91e209 | 697 | if (dd_size) |
7b8631b5 MC |
698 | conn->dd_data = &conn[1]; |
699 | ||
700 | INIT_LIST_HEAD(&conn->conn_list); | |
701 | conn->transport = transport; | |
b5c7a12d | 702 | conn->cid = cid; |
7b8631b5 MC |
703 | |
704 | /* this is released in the dev's release function */ | |
705 | if (!get_device(&session->dev)) | |
43a145a3 | 706 | goto free_conn; |
b5c7a12d | 707 | |
7b8631b5 | 708 | snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u", |
b5c7a12d | 709 | session->sid, cid); |
7b8631b5 MC |
710 | conn->dev.parent = &session->dev; |
711 | conn->dev.release = iscsi_conn_release; | |
712 | err = device_register(&conn->dev); | |
713 | if (err) { | |
322d739d MC |
714 | iscsi_cls_session_printk(KERN_ERR, session, "could not " |
715 | "register connection's dev\n"); | |
7b8631b5 MC |
716 | goto release_parent_ref; |
717 | } | |
718 | transport_register_device(&conn->dev); | |
26974789 MC |
719 | |
720 | spin_lock_irqsave(&connlock, flags); | |
721 | list_add(&conn->conn_list, &connlist); | |
722 | conn->active = 1; | |
723 | spin_unlock_irqrestore(&connlock, flags); | |
7b8631b5 MC |
724 | return conn; |
725 | ||
726 | release_parent_ref: | |
727 | put_device(&session->dev); | |
728 | free_conn: | |
729 | kfree(conn); | |
730 | return NULL; | |
731 | } | |
732 | ||
733 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
734 | ||
735 | /** | |
736 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 737 | * @conn: iscsi cls session |
7b8631b5 | 738 | * |
26974789 | 739 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 740 | */ |
7b8631b5 MC |
741 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
742 | { | |
26974789 MC |
743 | unsigned long flags; |
744 | ||
745 | spin_lock_irqsave(&connlock, flags); | |
746 | conn->active = 0; | |
747 | list_del(&conn->conn_list); | |
748 | spin_unlock_irqrestore(&connlock, flags); | |
749 | ||
7b8631b5 MC |
750 | transport_unregister_device(&conn->dev); |
751 | device_unregister(&conn->dev); | |
752 | return 0; | |
753 | } | |
7b8631b5 MC |
754 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
755 | ||
7b8631b5 MC |
756 | /* |
757 | * iscsi interface functions | |
758 | */ | |
0896b752 AA |
759 | static struct iscsi_internal * |
760 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
761 | { | |
762 | struct iscsi_internal *priv; | |
763 | unsigned long flags; | |
764 | ||
765 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
766 | list_for_each_entry(priv, &iscsi_transports, list) { | |
767 | if (tt == priv->iscsi_transport) { | |
768 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
769 | return priv; | |
770 | } | |
771 | } | |
772 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
773 | return NULL; | |
774 | } | |
1da177e4 | 775 | |
53cb8a1f | 776 | static int |
43a145a3 | 777 | iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp) |
53cb8a1f | 778 | { |
53cb8a1f MC |
779 | int rc; |
780 | ||
9aaa2b46 | 781 | rc = netlink_broadcast(nls, skb, 0, 1, gfp); |
53cb8a1f | 782 | if (rc < 0) { |
53cb8a1f MC |
783 | printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc); |
784 | return rc; | |
785 | } | |
786 | ||
53cb8a1f MC |
787 | return 0; |
788 | } | |
789 | ||
0896b752 | 790 | static int |
43a145a3 | 791 | iscsi_unicast_skb(struct sk_buff *skb, int pid) |
0896b752 | 792 | { |
0896b752 | 793 | int rc; |
1da177e4 | 794 | |
790f39a2 | 795 | rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT); |
0896b752 | 796 | if (rc < 0) { |
0896b752 AA |
797 | printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc); |
798 | return rc; | |
799 | } | |
800 | ||
0896b752 | 801 | return 0; |
1da177e4 | 802 | } |
1da177e4 | 803 | |
7b7232f3 | 804 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 805 | char *data, uint32_t data_size) |
1da177e4 | 806 | { |
0896b752 AA |
807 | struct nlmsghdr *nlh; |
808 | struct sk_buff *skb; | |
809 | struct iscsi_uevent *ev; | |
0896b752 | 810 | char *pdu; |
790f39a2 | 811 | struct iscsi_internal *priv; |
0896b752 AA |
812 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
813 | data_size); | |
814 | ||
790f39a2 MC |
815 | priv = iscsi_if_transport_lookup(conn->transport); |
816 | if (!priv) | |
817 | return -EINVAL; | |
818 | ||
43a145a3 | 819 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 820 | if (!skb) { |
7b7232f3 | 821 | iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED); |
322d739d MC |
822 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
823 | "control PDU: OOM\n"); | |
0896b752 AA |
824 | return -ENOMEM; |
825 | } | |
1da177e4 | 826 | |
790f39a2 | 827 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
828 | ev = NLMSG_DATA(nlh); |
829 | memset(ev, 0, sizeof(*ev)); | |
830 | ev->transport_handle = iscsi_handle(conn->transport); | |
831 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
832 | ev->r.recv_req.cid = conn->cid; |
833 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
834 | pdu = (char*)ev + sizeof(*ev); |
835 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
836 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 837 | |
43a145a3 | 838 | return iscsi_unicast_skb(skb, priv->daemon_pid); |
1da177e4 | 839 | } |
0896b752 | 840 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 841 | |
7b7232f3 | 842 | void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 843 | { |
0896b752 AA |
844 | struct nlmsghdr *nlh; |
845 | struct sk_buff *skb; | |
846 | struct iscsi_uevent *ev; | |
790f39a2 | 847 | struct iscsi_internal *priv; |
0896b752 AA |
848 | int len = NLMSG_SPACE(sizeof(*ev)); |
849 | ||
790f39a2 MC |
850 | priv = iscsi_if_transport_lookup(conn->transport); |
851 | if (!priv) | |
852 | return; | |
853 | ||
43a145a3 | 854 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 855 | if (!skb) { |
322d739d MC |
856 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
857 | "conn error (%d)\n", error); | |
0896b752 AA |
858 | return; |
859 | } | |
860 | ||
790f39a2 | 861 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
862 | ev = NLMSG_DATA(nlh); |
863 | ev->transport_handle = iscsi_handle(conn->transport); | |
864 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 865 | ev->r.connerror.error = error; |
b5c7a12d MC |
866 | ev->r.connerror.cid = conn->cid; |
867 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 868 | |
43a145a3 | 869 | iscsi_broadcast_skb(skb, GFP_ATOMIC); |
1da177e4 | 870 | |
322d739d MC |
871 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
872 | error); | |
0896b752 AA |
873 | } |
874 | EXPORT_SYMBOL_GPL(iscsi_conn_error); | |
875 | ||
876 | static int | |
877 | iscsi_if_send_reply(int pid, int seq, int type, int done, int multi, | |
878 | void *payload, int size) | |
879 | { | |
880 | struct sk_buff *skb; | |
881 | struct nlmsghdr *nlh; | |
882 | int len = NLMSG_SPACE(size); | |
883 | int flags = multi ? NLM_F_MULTI : 0; | |
884 | int t = done ? NLMSG_DONE : type; | |
885 | ||
43a145a3 | 886 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
887 | if (!skb) { |
888 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
889 | return -ENOMEM; | |
890 | } | |
0896b752 AA |
891 | |
892 | nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0); | |
893 | nlh->nlmsg_flags = flags; | |
894 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43a145a3 | 895 | return iscsi_unicast_skb(skb, pid); |
1da177e4 | 896 | } |
1da177e4 | 897 | |
7b8631b5 | 898 | static int |
5b940adf | 899 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
900 | { |
901 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
902 | struct iscsi_stats *stats; | |
903 | struct sk_buff *skbstat; | |
904 | struct iscsi_cls_conn *conn; | |
905 | struct nlmsghdr *nlhstat; | |
906 | struct iscsi_uevent *evstat; | |
790f39a2 | 907 | struct iscsi_internal *priv; |
7b8631b5 MC |
908 | int len = NLMSG_SPACE(sizeof(*ev) + |
909 | sizeof(struct iscsi_stats) + | |
910 | sizeof(struct iscsi_stats_custom) * | |
911 | ISCSI_STATS_CUSTOM_MAX); | |
912 | int err = 0; | |
0896b752 | 913 | |
790f39a2 MC |
914 | priv = iscsi_if_transport_lookup(transport); |
915 | if (!priv) | |
916 | return -EINVAL; | |
917 | ||
b5c7a12d | 918 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
919 | if (!conn) |
920 | return -EEXIST; | |
0896b752 | 921 | |
7b8631b5 MC |
922 | do { |
923 | int actual_size; | |
0896b752 | 924 | |
43a145a3 | 925 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 | 926 | if (!skbstat) { |
322d739d MC |
927 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
928 | "deliver stats: OOM\n"); | |
7b8631b5 MC |
929 | return -ENOMEM; |
930 | } | |
931 | ||
790f39a2 | 932 | nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0, |
7b8631b5 MC |
933 | (len - sizeof(*nlhstat)), 0); |
934 | evstat = NLMSG_DATA(nlhstat); | |
935 | memset(evstat, 0, sizeof(*evstat)); | |
936 | evstat->transport_handle = iscsi_handle(conn->transport); | |
937 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
938 | evstat->u.get_stats.cid = |
939 | ev->u.get_stats.cid; | |
940 | evstat->u.get_stats.sid = | |
941 | ev->u.get_stats.sid; | |
7b8631b5 MC |
942 | stats = (struct iscsi_stats *) |
943 | ((char*)evstat + sizeof(*evstat)); | |
944 | memset(stats, 0, sizeof(*stats)); | |
945 | ||
7b7232f3 | 946 | transport->get_stats(conn, stats); |
7b8631b5 MC |
947 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
948 | sizeof(struct iscsi_stats) + | |
949 | sizeof(struct iscsi_stats_custom) * | |
950 | stats->custom_length); | |
951 | actual_size -= sizeof(*nlhstat); | |
952 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 953 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
954 | nlhstat->nlmsg_len = actual_size; |
955 | ||
43a145a3 | 956 | err = iscsi_unicast_skb(skbstat, priv->daemon_pid); |
7b8631b5 MC |
957 | } while (err < 0 && err != -ECONNREFUSED); |
958 | ||
959 | return err; | |
0896b752 AA |
960 | } |
961 | ||
53cb8a1f | 962 | /** |
26974789 MC |
963 | * iscsi_session_event - send session destr. completion event |
964 | * @session: iscsi class session | |
965 | * @event: type of event | |
eb44820c | 966 | */ |
26974789 MC |
967 | int iscsi_session_event(struct iscsi_cls_session *session, |
968 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
969 | { |
970 | struct iscsi_internal *priv; | |
53cb8a1f MC |
971 | struct Scsi_Host *shost; |
972 | struct iscsi_uevent *ev; | |
973 | struct sk_buff *skb; | |
974 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
975 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
976 | ||
26974789 | 977 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
978 | if (!priv) |
979 | return -EINVAL; | |
53cb8a1f MC |
980 | shost = iscsi_session_to_shost(session); |
981 | ||
43a145a3 | 982 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 983 | if (!skb) { |
322d739d MC |
984 | iscsi_cls_session_printk(KERN_ERR, session, |
985 | "Cannot notify userspace of session " | |
986 | "event %u\n", event); | |
53cb8a1f MC |
987 | return -ENOMEM; |
988 | } | |
989 | ||
990 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
991 | ev = NLMSG_DATA(nlh); | |
26974789 | 992 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 993 | |
26974789 MC |
994 | ev->type = event; |
995 | switch (event) { | |
996 | case ISCSI_KEVENT_DESTROY_SESSION: | |
997 | ev->r.d_session.host_no = shost->host_no; | |
998 | ev->r.d_session.sid = session->sid; | |
999 | break; | |
1000 | case ISCSI_KEVENT_CREATE_SESSION: | |
1001 | ev->r.c_session_ret.host_no = shost->host_no; | |
1002 | ev->r.c_session_ret.sid = session->sid; | |
1003 | break; | |
1004 | case ISCSI_KEVENT_UNBIND_SESSION: | |
1005 | ev->r.unbind_session.host_no = shost->host_no; | |
1006 | ev->r.unbind_session.sid = session->sid; | |
1007 | break; | |
1008 | default: | |
322d739d MC |
1009 | iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
1010 | "%u.\n", event); | |
26974789 | 1011 | kfree_skb(skb); |
53cb8a1f | 1012 | return -EINVAL; |
53cb8a1f MC |
1013 | } |
1014 | ||
53cb8a1f MC |
1015 | /* |
1016 | * this will occur if the daemon is not up, so we just warn | |
1017 | * the user and when the daemon is restarted it will handle it | |
1018 | */ | |
43a145a3 | 1019 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
53cb8a1f | 1020 | if (rc < 0) |
322d739d MC |
1021 | iscsi_cls_session_printk(KERN_ERR, session, |
1022 | "Cannot notify userspace of session " | |
1023 | "event %u. Check iscsi daemon\n", | |
1024 | event); | |
53cb8a1f MC |
1025 | return rc; |
1026 | } | |
26974789 | 1027 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 1028 | |
0896b752 | 1029 | static int |
40753caa MC |
1030 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev, |
1031 | uint32_t host_no, uint32_t initial_cmdsn, | |
1032 | uint16_t cmds_max, uint16_t queue_depth) | |
0896b752 AA |
1033 | { |
1034 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 1035 | struct iscsi_cls_session *session; |
40753caa | 1036 | struct Scsi_Host *shost = NULL; |
0896b752 | 1037 | |
40753caa MC |
1038 | /* |
1039 | * Software iscsi allocates a host per session, but | |
1040 | * offload drivers (and possibly iser one day) allocate a host per | |
1041 | * hba/nic/rnic. Offload will match a host here, but software will | |
1042 | * return a new hostno after the create_session callback has returned. | |
1043 | */ | |
1044 | if (host_no != UINT_MAX) { | |
1045 | shost = scsi_host_lookup(host_no); | |
1046 | if (IS_ERR(shost)) { | |
1047 | printk(KERN_ERR "Could not find host no %u to " | |
1048 | "create session\n", host_no); | |
1049 | return -ENODEV; | |
1050 | } | |
1051 | } | |
1052 | ||
75613521 | 1053 | session = transport->create_session(shost, cmds_max, queue_depth, |
40753caa MC |
1054 | initial_cmdsn, &host_no); |
1055 | if (shost) | |
1056 | scsi_host_put(shost); | |
7b7232f3 | 1057 | if (!session) |
7b8631b5 | 1058 | return -ENOMEM; |
0896b752 | 1059 | |
40753caa | 1060 | ev->r.c_session_ret.host_no = host_no; |
b5c7a12d | 1061 | ev->r.c_session_ret.sid = session->sid; |
0896b752 | 1062 | return 0; |
0896b752 AA |
1063 | } |
1064 | ||
1065 | static int | |
7b7232f3 | 1066 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 1067 | { |
7b8631b5 | 1068 | struct iscsi_cls_conn *conn; |
7b7232f3 | 1069 | struct iscsi_cls_session *session; |
7b8631b5 | 1070 | |
b5c7a12d MC |
1071 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
1072 | if (!session) { | |
322d739d | 1073 | printk(KERN_ERR "iscsi: invalid session %d.\n", |
b5c7a12d | 1074 | ev->u.c_conn.sid); |
7b8631b5 | 1075 | return -EINVAL; |
b5c7a12d | 1076 | } |
0896b752 | 1077 | |
7b7232f3 | 1078 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d | 1079 | if (!conn) { |
322d739d MC |
1080 | iscsi_cls_session_printk(KERN_ERR, session, |
1081 | "couldn't create a new connection."); | |
7b7232f3 | 1082 | return -ENOMEM; |
b5c7a12d | 1083 | } |
0896b752 | 1084 | |
b5c7a12d MC |
1085 | ev->r.c_conn_ret.sid = session->sid; |
1086 | ev->r.c_conn_ret.cid = conn->cid; | |
0896b752 | 1087 | return 0; |
1da177e4 LT |
1088 | } |
1089 | ||
0896b752 AA |
1090 | static int |
1091 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1092 | { | |
7b8631b5 | 1093 | struct iscsi_cls_conn *conn; |
0896b752 | 1094 | |
b5c7a12d | 1095 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 1096 | if (!conn) |
7b8631b5 | 1097 | return -EINVAL; |
0896b752 | 1098 | |
7b8631b5 MC |
1099 | if (transport->destroy_conn) |
1100 | transport->destroy_conn(conn); | |
7b8631b5 | 1101 | return 0; |
0896b752 AA |
1102 | } |
1103 | ||
fd7255f5 MC |
1104 | static int |
1105 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1106 | { | |
1107 | char *data = (char*)ev + sizeof(*ev); | |
1108 | struct iscsi_cls_conn *conn; | |
1109 | struct iscsi_cls_session *session; | |
a54a52ca | 1110 | int err = 0, value = 0; |
fd7255f5 MC |
1111 | |
1112 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
1113 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
1114 | if (!conn || !session) | |
1115 | return -EINVAL; | |
1116 | ||
1117 | switch (ev->u.set_param.param) { | |
30a6c652 | 1118 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 1119 | sscanf(data, "%d", &value); |
30a6c652 MC |
1120 | if (value != 0) |
1121 | session->recovery_tmo = value; | |
1122 | break; | |
fd7255f5 | 1123 | default: |
a54a52ca MC |
1124 | err = transport->set_param(conn, ev->u.set_param.param, |
1125 | data, ev->u.set_param.len); | |
fd7255f5 MC |
1126 | } |
1127 | ||
1128 | return err; | |
1129 | } | |
1130 | ||
264faaaa OG |
1131 | static int |
1132 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
1133 | struct iscsi_uevent *ev, int msg_type) | |
1134 | { | |
1135 | struct sockaddr *dst_addr; | |
1136 | int rc = 0; | |
1137 | ||
1138 | switch (msg_type) { | |
1139 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: | |
1140 | if (!transport->ep_connect) | |
1141 | return -EINVAL; | |
1142 | ||
1143 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
1144 | rc = transport->ep_connect(dst_addr, | |
1145 | ev->u.ep_connect.non_blocking, | |
1146 | &ev->r.ep_connect_ret.handle); | |
1147 | break; | |
1148 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1149 | if (!transport->ep_poll) | |
1150 | return -EINVAL; | |
1151 | ||
1152 | ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle, | |
1153 | ev->u.ep_poll.timeout_ms); | |
1154 | break; | |
1155 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1156 | if (!transport->ep_disconnect) | |
1157 | return -EINVAL; | |
1158 | ||
1159 | transport->ep_disconnect(ev->u.ep_disconnect.ep_handle); | |
1160 | break; | |
1161 | } | |
1162 | return rc; | |
1163 | } | |
1164 | ||
01cb225d MC |
1165 | static int |
1166 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
1167 | struct iscsi_uevent *ev) | |
1168 | { | |
2174a04e | 1169 | struct Scsi_Host *shost; |
01cb225d | 1170 | struct sockaddr *dst_addr; |
2174a04e | 1171 | int err; |
01cb225d MC |
1172 | |
1173 | if (!transport->tgt_dscvr) | |
1174 | return -EINVAL; | |
1175 | ||
2174a04e MC |
1176 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
1177 | if (IS_ERR(shost)) { | |
1178 | printk(KERN_ERR "target discovery could not find host no %u\n", | |
1179 | ev->u.tgt_dscvr.host_no); | |
1180 | return -ENODEV; | |
1181 | } | |
1182 | ||
1183 | ||
01cb225d | 1184 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
1185 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
1186 | ev->u.tgt_dscvr.enable, dst_addr); | |
1187 | scsi_host_put(shost); | |
1188 | return err; | |
01cb225d MC |
1189 | } |
1190 | ||
1d9bf13a MC |
1191 | static int |
1192 | iscsi_set_host_param(struct iscsi_transport *transport, | |
1193 | struct iscsi_uevent *ev) | |
1194 | { | |
1195 | char *data = (char*)ev + sizeof(*ev); | |
1196 | struct Scsi_Host *shost; | |
1197 | int err; | |
1198 | ||
1199 | if (!transport->set_host_param) | |
1200 | return -ENOSYS; | |
1201 | ||
1202 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
1203 | if (IS_ERR(shost)) { | |
1204 | printk(KERN_ERR "set_host_param could not find host no %u\n", | |
1205 | ev->u.set_host_param.host_no); | |
1206 | return -ENODEV; | |
1207 | } | |
1208 | ||
1209 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1210 | data, ev->u.set_host_param.len); | |
1211 | scsi_host_put(shost); | |
1212 | return err; | |
1213 | } | |
1214 | ||
0896b752 AA |
1215 | static int |
1216 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) | |
1217 | { | |
1218 | int err = 0; | |
40753caa | 1219 | uint32_t host_no = UINT_MAX; |
0896b752 AA |
1220 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); |
1221 | struct iscsi_transport *transport = NULL; | |
1222 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1223 | struct iscsi_cls_session *session; |
1224 | struct iscsi_cls_conn *conn; | |
0896b752 | 1225 | |
0896b752 AA |
1226 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1227 | if (!priv) | |
1228 | return -EINVAL; | |
1229 | transport = priv->iscsi_transport; | |
1230 | ||
7b7232f3 MC |
1231 | if (!try_module_get(transport->owner)) |
1232 | return -EINVAL; | |
1233 | ||
790f39a2 MC |
1234 | priv->daemon_pid = NETLINK_CREDS(skb)->pid; |
1235 | ||
0896b752 AA |
1236 | switch (nlh->nlmsg_type) { |
1237 | case ISCSI_UEVENT_CREATE_SESSION: | |
40753caa MC |
1238 | err = iscsi_if_create_session(priv, ev, host_no, |
1239 | ev->u.c_session.initial_cmdsn, | |
1240 | ev->u.c_session.cmds_max, | |
1241 | ev->u.c_session.queue_depth); | |
1242 | break; | |
1243 | case ISCSI_UEVENT_CREATE_BOUND_SESSION: | |
1244 | err = iscsi_if_create_session(priv, ev, | |
1245 | ev->u.c_bound_session.host_no, | |
1246 | ev->u.c_bound_session.initial_cmdsn, | |
1247 | ev->u.c_bound_session.cmds_max, | |
1248 | ev->u.c_bound_session.queue_depth); | |
0896b752 AA |
1249 | break; |
1250 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1251 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1252 | if (session) |
7b7232f3 | 1253 | transport->destroy_session(session); |
26974789 MC |
1254 | else |
1255 | err = -EINVAL; | |
1256 | break; | |
1257 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1258 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1259 | if (session) | |
1260 | iscsi_unbind_session(session); | |
1261 | else | |
7b7232f3 | 1262 | err = -EINVAL; |
0896b752 AA |
1263 | break; |
1264 | case ISCSI_UEVENT_CREATE_CONN: | |
1265 | err = iscsi_if_create_conn(transport, ev); | |
1266 | break; | |
1267 | case ISCSI_UEVENT_DESTROY_CONN: | |
1268 | err = iscsi_if_destroy_conn(transport, ev); | |
1269 | break; | |
1270 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1271 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1272 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 MC |
1273 | |
1274 | if (session && conn) | |
1275 | ev->r.retcode = transport->bind_conn(session, conn, | |
264faaaa | 1276 | ev->u.b_conn.transport_eph, |
7b7232f3 MC |
1277 | ev->u.b_conn.is_leading); |
1278 | else | |
1279 | err = -EINVAL; | |
0896b752 AA |
1280 | break; |
1281 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1282 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1283 | break; |
1284 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1285 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1286 | if (conn) |
1287 | ev->r.retcode = transport->start_conn(conn); | |
1288 | else | |
1289 | err = -EINVAL; | |
0896b752 AA |
1290 | break; |
1291 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1292 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1293 | if (conn) |
1294 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1295 | else | |
1296 | err = -EINVAL; | |
0896b752 AA |
1297 | break; |
1298 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1299 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1300 | if (conn) |
1301 | ev->r.retcode = transport->send_pdu(conn, | |
1302 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1303 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1304 | ev->u.send_pdu.data_size); | |
1305 | else | |
1306 | err = -EINVAL; | |
0896b752 AA |
1307 | break; |
1308 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1309 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1310 | break; |
264faaaa OG |
1311 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1312 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1313 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1314 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); | |
1315 | break; | |
01cb225d MC |
1316 | case ISCSI_UEVENT_TGT_DSCVR: |
1317 | err = iscsi_tgt_dscvr(transport, ev); | |
1318 | break; | |
1d9bf13a MC |
1319 | case ISCSI_UEVENT_SET_HOST_PARAM: |
1320 | err = iscsi_set_host_param(transport, ev); | |
1321 | break; | |
0896b752 | 1322 | default: |
1d9bf13a | 1323 | err = -ENOSYS; |
0896b752 AA |
1324 | break; |
1325 | } | |
1326 | ||
7b7232f3 | 1327 | module_put(transport->owner); |
0896b752 AA |
1328 | return err; |
1329 | } | |
1330 | ||
b5c7a12d | 1331 | /* |
cd40b7d3 DL |
1332 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
1333 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 1334 | */ |
0896b752 | 1335 | static void |
cd40b7d3 | 1336 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 1337 | { |
0b950672 | 1338 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
1339 | while (skb->len >= NLMSG_SPACE(0)) { |
1340 | int err; | |
1341 | uint32_t rlen; | |
1342 | struct nlmsghdr *nlh; | |
1343 | struct iscsi_uevent *ev; | |
1344 | ||
1345 | nlh = nlmsg_hdr(skb); | |
1346 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
1347 | skb->len < nlh->nlmsg_len) { | |
1348 | break; | |
ee7f8e40 | 1349 | } |
ee7f8e40 | 1350 | |
cd40b7d3 DL |
1351 | ev = NLMSG_DATA(nlh); |
1352 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1353 | if (rlen > skb->len) | |
1354 | rlen = skb->len; | |
0896b752 | 1355 | |
cd40b7d3 DL |
1356 | err = iscsi_if_recv_msg(skb, nlh); |
1357 | if (err) { | |
1358 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1359 | ev->iferror = err; | |
0896b752 | 1360 | } |
cd40b7d3 DL |
1361 | do { |
1362 | /* | |
1363 | * special case for GET_STATS: | |
1364 | * on success - sending reply and stats from | |
1365 | * inside of if_recv_msg(), | |
1366 | * on error - fall through. | |
1367 | */ | |
1368 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1369 | break; | |
1370 | err = iscsi_if_send_reply( | |
1371 | NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq, | |
1372 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); | |
1373 | } while (err < 0 && err != -ECONNREFUSED); | |
1374 | skb_pull(skb, rlen); | |
0896b752 | 1375 | } |
0b950672 | 1376 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1377 | } |
1da177e4 | 1378 | |
fd7255f5 | 1379 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
ee959b00 | 1380 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
fd7255f5 MC |
1381 | __ATTR(_name,_mode,_show,_store) |
1382 | ||
1da177e4 | 1383 | /* |
0896b752 | 1384 | * iSCSI connection attrs |
1da177e4 | 1385 | */ |
a54a52ca | 1386 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1387 | static ssize_t \ |
ee959b00 TJ |
1388 | show_conn_param_##param(struct device *dev, \ |
1389 | struct device_attribute *attr, char *buf) \ | |
0896b752 | 1390 | { \ |
ee959b00 | 1391 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ |
7b8631b5 | 1392 | struct iscsi_transport *t = conn->transport; \ |
a54a52ca | 1393 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1394 | } |
1395 | ||
a54a52ca MC |
1396 | #define iscsi_conn_attr(field, param) \ |
1397 | iscsi_conn_attr_show(param) \ | |
1398 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1399 | NULL); |
0896b752 | 1400 | |
a54a52ca MC |
1401 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1402 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1403 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1404 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1405 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1406 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1407 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
1408 | iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT); | |
1409 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); | |
1410 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
1411 | iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
f6d5180c MC |
1412 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
1413 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 LT |
1414 | |
1415 | /* | |
0896b752 | 1416 | * iSCSI session attrs |
1da177e4 | 1417 | */ |
b2c64167 | 1418 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 1419 | static ssize_t \ |
ee959b00 TJ |
1420 | show_session_param_##param(struct device *dev, \ |
1421 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1422 | { \ |
ee959b00 TJ |
1423 | struct iscsi_cls_session *session = \ |
1424 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 | 1425 | struct iscsi_transport *t = session->transport; \ |
b2c64167 MC |
1426 | \ |
1427 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
1428 | return -EACCES; \ | |
a54a52ca | 1429 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
1430 | } |
1431 | ||
b2c64167 MC |
1432 | #define iscsi_session_attr(field, param, perm) \ |
1433 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 1434 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 MC |
1435 | NULL); |
1436 | ||
b2c64167 MC |
1437 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
1438 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
1439 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
1440 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
1441 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
1442 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
1443 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
1444 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
1445 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
1446 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
1447 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
1448 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
1449 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
1450 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
1451 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
1452 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
1453 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
1da177e4 | 1454 | |
6eabafbe | 1455 | static ssize_t |
ee959b00 TJ |
1456 | show_priv_session_state(struct device *dev, struct device_attribute *attr, |
1457 | char *buf) | |
6eabafbe | 1458 | { |
ee959b00 | 1459 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); |
6eabafbe MC |
1460 | return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); |
1461 | } | |
1462 | static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, | |
1463 | NULL); | |
1464 | ||
fd7255f5 MC |
1465 | #define iscsi_priv_session_attr_show(field, format) \ |
1466 | static ssize_t \ | |
ee959b00 TJ |
1467 | show_priv_session_##field(struct device *dev, \ |
1468 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1469 | { \ |
ee959b00 TJ |
1470 | struct iscsi_cls_session *session = \ |
1471 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 MC |
1472 | return sprintf(buf, format"\n", session->field); \ |
1473 | } | |
1474 | ||
1475 | #define iscsi_priv_session_attr(field, format) \ | |
1476 | iscsi_priv_session_attr_show(field, format) \ | |
1477 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \ | |
1478 | NULL) | |
30a6c652 | 1479 | iscsi_priv_session_attr(recovery_tmo, "%d"); |
fd7255f5 | 1480 | |
1819dc81 MC |
1481 | /* |
1482 | * iSCSI host attrs | |
1483 | */ | |
1484 | #define iscsi_host_attr_show(param) \ | |
1485 | static ssize_t \ | |
ee959b00 TJ |
1486 | show_host_param_##param(struct device *dev, \ |
1487 | struct device_attribute *attr, char *buf) \ | |
1819dc81 | 1488 | { \ |
ee959b00 | 1489 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1819dc81 MC |
1490 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ |
1491 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
1492 | } | |
1493 | ||
1494 | #define iscsi_host_attr(field, param) \ | |
1495 | iscsi_host_attr_show(param) \ | |
1496 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
1497 | NULL); | |
1498 | ||
d8196ed2 | 1499 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 1500 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 1501 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 1502 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 1503 | |
fd7255f5 MC |
1504 | #define SETUP_PRIV_SESSION_RD_ATTR(field) \ |
1505 | do { \ | |
ee959b00 | 1506 | priv->session_attrs[count] = &dev_attr_priv_sess_##field; \ |
fd7255f5 MC |
1507 | count++; \ |
1508 | } while (0) | |
1509 | ||
a54a52ca | 1510 | |
fd7255f5 MC |
1511 | #define SETUP_SESSION_RD_ATTR(field, param_flag) \ |
1512 | do { \ | |
1513 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1514 | priv->session_attrs[count] = &dev_attr_sess_##field; \ |
1da177e4 | 1515 | count++; \ |
fd7255f5 MC |
1516 | } \ |
1517 | } while (0) | |
1518 | ||
fd7255f5 MC |
1519 | #define SETUP_CONN_RD_ATTR(field, param_flag) \ |
1520 | do { \ | |
1521 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1522 | priv->conn_attrs[count] = &dev_attr_conn_##field; \ |
fd7255f5 MC |
1523 | count++; \ |
1524 | } \ | |
1525 | } while (0) | |
1da177e4 | 1526 | |
1819dc81 MC |
1527 | #define SETUP_HOST_RD_ATTR(field, param_flag) \ |
1528 | do { \ | |
1529 | if (tt->host_param_mask & param_flag) { \ | |
ee959b00 | 1530 | priv->host_attrs[count] = &dev_attr_host_##field; \ |
1819dc81 MC |
1531 | count++; \ |
1532 | } \ | |
1533 | } while (0) | |
1534 | ||
0896b752 AA |
1535 | static int iscsi_session_match(struct attribute_container *cont, |
1536 | struct device *dev) | |
1da177e4 | 1537 | { |
7b8631b5 | 1538 | struct iscsi_cls_session *session; |
1da177e4 | 1539 | struct Scsi_Host *shost; |
0896b752 AA |
1540 | struct iscsi_internal *priv; |
1541 | ||
1542 | if (!iscsi_is_session_dev(dev)) | |
1543 | return 0; | |
1da177e4 | 1544 | |
7b8631b5 MC |
1545 | session = iscsi_dev_to_session(dev); |
1546 | shost = iscsi_session_to_shost(session); | |
0896b752 | 1547 | if (!shost->transportt) |
1da177e4 LT |
1548 | return 0; |
1549 | ||
0896b752 AA |
1550 | priv = to_iscsi_internal(shost->transportt); |
1551 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
1552 | return 0; |
1553 | ||
0896b752 | 1554 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
1555 | } |
1556 | ||
0896b752 AA |
1557 | static int iscsi_conn_match(struct attribute_container *cont, |
1558 | struct device *dev) | |
1559 | { | |
7b8631b5 MC |
1560 | struct iscsi_cls_session *session; |
1561 | struct iscsi_cls_conn *conn; | |
1da177e4 | 1562 | struct Scsi_Host *shost; |
0896b752 | 1563 | struct iscsi_internal *priv; |
1da177e4 | 1564 | |
0896b752 | 1565 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
1566 | return 0; |
1567 | ||
7b8631b5 MC |
1568 | conn = iscsi_dev_to_conn(dev); |
1569 | session = iscsi_dev_to_session(conn->dev.parent); | |
1570 | shost = iscsi_session_to_shost(session); | |
1571 | ||
0896b752 | 1572 | if (!shost->transportt) |
1da177e4 LT |
1573 | return 0; |
1574 | ||
0896b752 AA |
1575 | priv = to_iscsi_internal(shost->transportt); |
1576 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
1577 | return 0; | |
1da177e4 | 1578 | |
0896b752 AA |
1579 | return &priv->conn_cont.ac == cont; |
1580 | } | |
1581 | ||
30a6c652 MC |
1582 | static int iscsi_host_match(struct attribute_container *cont, |
1583 | struct device *dev) | |
1584 | { | |
1585 | struct Scsi_Host *shost; | |
1586 | struct iscsi_internal *priv; | |
1587 | ||
1588 | if (!scsi_is_host_device(dev)) | |
1589 | return 0; | |
1590 | ||
1591 | shost = dev_to_shost(dev); | |
1592 | if (!shost->transportt || | |
1593 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
1594 | return 0; | |
1595 | ||
1596 | priv = to_iscsi_internal(shost->transportt); | |
1597 | return &priv->t.host_attrs.ac == cont; | |
1598 | } | |
1599 | ||
7b8631b5 MC |
1600 | struct scsi_transport_template * |
1601 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
1602 | { |
1603 | struct iscsi_internal *priv; | |
1604 | unsigned long flags; | |
1605 | int count = 0, err; | |
1606 | ||
1607 | BUG_ON(!tt); | |
1608 | ||
1609 | priv = iscsi_if_transport_lookup(tt); | |
1610 | if (priv) | |
7b8631b5 | 1611 | return NULL; |
0896b752 | 1612 | |
24669f75 | 1613 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 1614 | if (!priv) |
7b8631b5 | 1615 | return NULL; |
0896b752 | 1616 | INIT_LIST_HEAD(&priv->list); |
53cb8a1f | 1617 | priv->daemon_pid = -1; |
0896b752 | 1618 | priv->iscsi_transport = tt; |
30a6c652 | 1619 | priv->t.user_scan = iscsi_user_scan; |
a4804cd6 MC |
1620 | if (!(tt->caps & CAP_DATA_PATH_OFFLOAD)) |
1621 | priv->t.create_work_queue = 1; | |
0896b752 | 1622 | |
ee959b00 TJ |
1623 | priv->dev.class = &iscsi_transport_class; |
1624 | snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name); | |
1625 | err = device_register(&priv->dev); | |
0896b752 AA |
1626 | if (err) |
1627 | goto free_priv; | |
1628 | ||
ee959b00 | 1629 | err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); |
0896b752 | 1630 | if (err) |
ee959b00 | 1631 | goto unregister_dev; |
0896b752 | 1632 | |
30a6c652 MC |
1633 | /* host parameters */ |
1634 | priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; | |
1635 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; | |
1636 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
32c6e1b9 | 1637 | priv->t.host_size = sizeof(struct iscsi_cls_host); |
30a6c652 MC |
1638 | transport_container_register(&priv->t.host_attrs); |
1639 | ||
d8196ed2 | 1640 | SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); |
22236961 | 1641 | SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS); |
1819dc81 | 1642 | SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS); |
8ad5781a | 1643 | SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME); |
1819dc81 MC |
1644 | BUG_ON(count > ISCSI_HOST_ATTRS); |
1645 | priv->host_attrs[count] = NULL; | |
1646 | count = 0; | |
1647 | ||
0896b752 AA |
1648 | /* connection parameters */ |
1649 | priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; | |
1650 | priv->conn_cont.ac.class = &iscsi_connection_class.class; | |
1651 | priv->conn_cont.ac.match = iscsi_conn_match; | |
1652 | transport_container_register(&priv->conn_cont); | |
1da177e4 | 1653 | |
fd7255f5 MC |
1654 | SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH); |
1655 | SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH); | |
1656 | SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN); | |
1657 | SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN); | |
1658 | SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN); | |
1659 | SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN); | |
1660 | SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS); | |
1661 | SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT); | |
8d2860b3 | 1662 | SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN); |
a54a52ca MC |
1663 | SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS); |
1664 | SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT); | |
f6d5180c MC |
1665 | SETUP_CONN_RD_ATTR(ping_tmo, ISCSI_PING_TMO); |
1666 | SETUP_CONN_RD_ATTR(recv_tmo, ISCSI_RECV_TMO); | |
0896b752 AA |
1667 | |
1668 | BUG_ON(count > ISCSI_CONN_ATTRS); | |
1669 | priv->conn_attrs[count] = NULL; | |
1da177e4 | 1670 | count = 0; |
1da177e4 | 1671 | |
0896b752 AA |
1672 | /* session parameters */ |
1673 | priv->session_cont.ac.attrs = &priv->session_attrs[0]; | |
1674 | priv->session_cont.ac.class = &iscsi_session_class.class; | |
1675 | priv->session_cont.ac.match = iscsi_session_match; | |
1676 | transport_container_register(&priv->session_cont); | |
1677 | ||
fd7255f5 MC |
1678 | SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN); |
1679 | SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T); | |
1680 | SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN); | |
1681 | SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST); | |
1682 | SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST); | |
1683 | SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN); | |
1684 | SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN); | |
1685 | SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL); | |
a54a52ca MC |
1686 | SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME); |
1687 | SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT); | |
b2c64167 MC |
1688 | SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME); |
1689 | SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN); | |
1690 | SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD); | |
1691 | SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN); | |
843c0a8a | 1692 | SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); |
4cd49ea1 MC |
1693 | SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO); |
1694 | SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO); | |
30a6c652 | 1695 | SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); |
6eabafbe | 1696 | SETUP_PRIV_SESSION_RD_ATTR(state); |
fd7255f5 | 1697 | |
0896b752 AA |
1698 | BUG_ON(count > ISCSI_SESSION_ATTRS); |
1699 | priv->session_attrs[count] = NULL; | |
1700 | ||
1701 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1702 | list_add(&priv->list, &iscsi_transports); | |
1703 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1704 | ||
1705 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 1706 | return &priv->t; |
1da177e4 | 1707 | |
ee959b00 TJ |
1708 | unregister_dev: |
1709 | device_unregister(&priv->dev); | |
0896b752 AA |
1710 | free_priv: |
1711 | kfree(priv); | |
7b8631b5 | 1712 | return NULL; |
1da177e4 | 1713 | } |
0896b752 AA |
1714 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
1715 | ||
1716 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
1717 | { | |
1718 | struct iscsi_internal *priv; | |
1719 | unsigned long flags; | |
1720 | ||
1721 | BUG_ON(!tt); | |
1722 | ||
0b950672 | 1723 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
1724 | |
1725 | priv = iscsi_if_transport_lookup(tt); | |
1726 | BUG_ON (!priv); | |
1727 | ||
0896b752 AA |
1728 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
1729 | list_del(&priv->list); | |
1730 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1731 | ||
1732 | transport_container_unregister(&priv->conn_cont); | |
1733 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 1734 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 | 1735 | |
ee959b00 TJ |
1736 | sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); |
1737 | device_unregister(&priv->dev); | |
0b950672 | 1738 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 1739 | |
0896b752 AA |
1740 | return 0; |
1741 | } | |
1742 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 1743 | |
1da177e4 LT |
1744 | static __init int iscsi_transport_init(void) |
1745 | { | |
0896b752 | 1746 | int err; |
1da177e4 | 1747 | |
09492605 | 1748 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
1749 | ISCSI_TRANSPORT_VERSION); |
1750 | ||
41be1444 MC |
1751 | atomic_set(&iscsi_session_nr, 0); |
1752 | ||
0896b752 | 1753 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
1754 | if (err) |
1755 | return err; | |
0896b752 | 1756 | |
30a6c652 | 1757 | err = transport_class_register(&iscsi_host_class); |
0896b752 AA |
1758 | if (err) |
1759 | goto unregister_transport_class; | |
1760 | ||
30a6c652 MC |
1761 | err = transport_class_register(&iscsi_connection_class); |
1762 | if (err) | |
1763 | goto unregister_host_class; | |
1764 | ||
0896b752 AA |
1765 | err = transport_class_register(&iscsi_session_class); |
1766 | if (err) | |
1767 | goto unregister_conn_class; | |
1768 | ||
b4b51029 | 1769 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL, |
7b8631b5 | 1770 | THIS_MODULE); |
0896b752 AA |
1771 | if (!nls) { |
1772 | err = -ENOBUFS; | |
43a145a3 | 1773 | goto unregister_session_class; |
0896b752 AA |
1774 | } |
1775 | ||
d8bf541e MC |
1776 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
1777 | if (!iscsi_eh_timer_workq) | |
1778 | goto release_nls; | |
1779 | ||
43a145a3 | 1780 | return 0; |
0896b752 | 1781 | |
d8bf541e | 1782 | release_nls: |
b7c6ba6e | 1783 | netlink_kernel_release(nls); |
0896b752 AA |
1784 | unregister_session_class: |
1785 | transport_class_unregister(&iscsi_session_class); | |
1786 | unregister_conn_class: | |
1787 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
1788 | unregister_host_class: |
1789 | transport_class_unregister(&iscsi_host_class); | |
0896b752 AA |
1790 | unregister_transport_class: |
1791 | class_unregister(&iscsi_transport_class); | |
1792 | return err; | |
1da177e4 LT |
1793 | } |
1794 | ||
1795 | static void __exit iscsi_transport_exit(void) | |
1796 | { | |
d8bf541e | 1797 | destroy_workqueue(iscsi_eh_timer_workq); |
b7c6ba6e | 1798 | netlink_kernel_release(nls); |
0896b752 AA |
1799 | transport_class_unregister(&iscsi_connection_class); |
1800 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 1801 | transport_class_unregister(&iscsi_host_class); |
0896b752 | 1802 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
1803 | } |
1804 | ||
1805 | module_init(iscsi_transport_init); | |
1806 | module_exit(iscsi_transport_exit); | |
1807 | ||
0896b752 AA |
1808 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
1809 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
1810 | "Alex Aizman <itn780@yahoo.com>"); | |
1811 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 1812 | MODULE_LICENSE("GPL"); |
f4246b33 | 1813 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |