]>
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)); | |
8aae18ad | 122 | atomic_set(&ihost->nr_scans, 0); |
7970634b | 123 | mutex_init(&ihost->mutex); |
26974789 | 124 | |
bd976f62 | 125 | snprintf(ihost->scan_workq_name, KOBJ_NAME_LEN, "iscsi_scan_%d", |
26974789 | 126 | shost->host_no); |
bd976f62 MC |
127 | ihost->scan_workq = create_singlethread_workqueue( |
128 | ihost->scan_workq_name); | |
129 | if (!ihost->scan_workq) | |
26974789 MC |
130 | return -ENOMEM; |
131 | return 0; | |
132 | } | |
133 | ||
134 | static int iscsi_remove_host(struct transport_container *tc, struct device *dev, | |
ee959b00 | 135 | struct device *cdev) |
26974789 MC |
136 | { |
137 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 138 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 | 139 | |
bd976f62 | 140 | destroy_workqueue(ihost->scan_workq); |
30a6c652 MC |
141 | return 0; |
142 | } | |
143 | ||
144 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
145 | "iscsi_host", | |
146 | iscsi_setup_host, | |
26974789 | 147 | iscsi_remove_host, |
30a6c652 MC |
148 | NULL); |
149 | ||
0896b752 AA |
150 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
151 | "iscsi_session", | |
1da177e4 LT |
152 | NULL, |
153 | NULL, | |
154 | NULL); | |
155 | ||
0896b752 AA |
156 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
157 | "iscsi_connection", | |
1da177e4 LT |
158 | NULL, |
159 | NULL, | |
160 | NULL); | |
0896b752 AA |
161 | |
162 | static struct sock *nls; | |
0b950672 | 163 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 164 | |
7b7232f3 MC |
165 | static LIST_HEAD(sesslist); |
166 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
167 | static LIST_HEAD(connlist); |
168 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 169 | |
b5c7a12d MC |
170 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
171 | { | |
172 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
173 | return sess->sid; | |
174 | } | |
175 | ||
176 | /* | |
177 | * Returns the matching session to a given sid | |
178 | */ | |
179 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
180 | { |
181 | unsigned long flags; | |
182 | struct iscsi_cls_session *sess; | |
183 | ||
184 | spin_lock_irqsave(&sesslock, flags); | |
185 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 186 | if (sess->sid == sid) { |
7b7232f3 MC |
187 | spin_unlock_irqrestore(&sesslock, flags); |
188 | return sess; | |
189 | } | |
190 | } | |
191 | spin_unlock_irqrestore(&sesslock, flags); | |
192 | return NULL; | |
193 | } | |
194 | ||
b5c7a12d MC |
195 | /* |
196 | * Returns the matching connection to a given sid / cid tuple | |
197 | */ | |
198 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
199 | { |
200 | unsigned long flags; | |
201 | struct iscsi_cls_conn *conn; | |
202 | ||
203 | spin_lock_irqsave(&connlock, flags); | |
204 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 205 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
206 | spin_unlock_irqrestore(&connlock, flags); |
207 | return conn; | |
208 | } | |
209 | } | |
210 | spin_unlock_irqrestore(&connlock, flags); | |
211 | return NULL; | |
212 | } | |
213 | ||
7b8631b5 MC |
214 | /* |
215 | * The following functions can be used by LLDs that allocate | |
216 | * their own scsi_hosts or by software iscsi LLDs | |
217 | */ | |
6eabafbe MC |
218 | static struct { |
219 | int value; | |
220 | char *name; | |
221 | } iscsi_session_state_names[] = { | |
222 | { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, | |
223 | { ISCSI_SESSION_FAILED, "FAILED" }, | |
224 | { ISCSI_SESSION_FREE, "FREE" }, | |
225 | }; | |
226 | ||
3b0f208a | 227 | static const char *iscsi_session_state_name(int state) |
6eabafbe MC |
228 | { |
229 | int i; | |
230 | char *name = NULL; | |
231 | ||
232 | for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { | |
233 | if (iscsi_session_state_names[i].value == state) { | |
234 | name = iscsi_session_state_names[i].name; | |
235 | break; | |
236 | } | |
237 | } | |
238 | return name; | |
239 | } | |
240 | ||
241 | int iscsi_session_chkready(struct iscsi_cls_session *session) | |
242 | { | |
243 | unsigned long flags; | |
244 | int err; | |
245 | ||
246 | spin_lock_irqsave(&session->lock, flags); | |
247 | switch (session->state) { | |
248 | case ISCSI_SESSION_LOGGED_IN: | |
249 | err = 0; | |
250 | break; | |
251 | case ISCSI_SESSION_FAILED: | |
252 | err = DID_IMM_RETRY << 16; | |
253 | break; | |
254 | case ISCSI_SESSION_FREE: | |
255 | err = DID_NO_CONNECT << 16; | |
256 | break; | |
257 | default: | |
258 | err = DID_NO_CONNECT << 16; | |
259 | break; | |
260 | } | |
261 | spin_unlock_irqrestore(&session->lock, flags); | |
262 | return err; | |
263 | } | |
264 | EXPORT_SYMBOL_GPL(iscsi_session_chkready); | |
265 | ||
7b8631b5 MC |
266 | static void iscsi_session_release(struct device *dev) |
267 | { | |
268 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 269 | struct Scsi_Host *shost; |
0896b752 | 270 | |
7b8631b5 MC |
271 | shost = iscsi_session_to_shost(session); |
272 | scsi_host_put(shost); | |
273 | kfree(session); | |
7b8631b5 | 274 | } |
0896b752 | 275 | |
7b8631b5 MC |
276 | static int iscsi_is_session_dev(const struct device *dev) |
277 | { | |
278 | return dev->release == iscsi_session_release; | |
279 | } | |
0896b752 | 280 | |
a4804cd6 MC |
281 | static int iscsi_iter_session_fn(struct device *dev, void *data) |
282 | { | |
283 | void (* fn) (struct iscsi_cls_session *) = data; | |
284 | ||
285 | if (!iscsi_is_session_dev(dev)) | |
286 | return 0; | |
287 | fn(iscsi_dev_to_session(dev)); | |
288 | return 0; | |
289 | } | |
290 | ||
291 | void iscsi_host_for_each_session(struct Scsi_Host *shost, | |
292 | void (*fn)(struct iscsi_cls_session *)) | |
293 | { | |
294 | device_for_each_child(&shost->shost_gendev, fn, | |
295 | iscsi_iter_session_fn); | |
296 | } | |
297 | EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); | |
298 | ||
8aae18ad MC |
299 | /** |
300 | * iscsi_scan_finished - helper to report when running scans are done | |
301 | * @shost: scsi host | |
302 | * @time: scan run time | |
303 | * | |
304 | * This function can be used by drives like qla4xxx to report to the scsi | |
305 | * layer when the scans it kicked off at module load time are done. | |
306 | */ | |
307 | int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
308 | { | |
32c6e1b9 | 309 | struct iscsi_cls_host *ihost = shost->shost_data; |
8aae18ad MC |
310 | /* |
311 | * qla4xxx will have kicked off some session unblocks before calling | |
312 | * scsi_scan_host, so just wait for them to complete. | |
313 | */ | |
314 | return !atomic_read(&ihost->nr_scans); | |
315 | } | |
316 | EXPORT_SYMBOL_GPL(iscsi_scan_finished); | |
317 | ||
7970634b MC |
318 | struct iscsi_scan_data { |
319 | unsigned int channel; | |
320 | unsigned int id; | |
321 | unsigned int lun; | |
322 | }; | |
323 | ||
324 | static int iscsi_user_scan_session(struct device *dev, void *data) | |
30a6c652 | 325 | { |
7970634b | 326 | struct iscsi_scan_data *scan_data = data; |
30a6c652 | 327 | struct iscsi_cls_session *session; |
7970634b MC |
328 | struct Scsi_Host *shost; |
329 | struct iscsi_cls_host *ihost; | |
330 | unsigned long flags; | |
331 | unsigned int id; | |
332 | ||
333 | if (!iscsi_is_session_dev(dev)) | |
334 | return 0; | |
335 | ||
336 | session = iscsi_dev_to_session(dev); | |
337 | shost = iscsi_session_to_shost(session); | |
338 | ihost = shost->shost_data; | |
30a6c652 MC |
339 | |
340 | mutex_lock(&ihost->mutex); | |
7970634b MC |
341 | spin_lock_irqsave(&session->lock, flags); |
342 | if (session->state != ISCSI_SESSION_LOGGED_IN) { | |
343 | spin_unlock_irqrestore(&session->lock, flags); | |
344 | mutex_unlock(&ihost->mutex); | |
345 | return 0; | |
30a6c652 | 346 | } |
7970634b MC |
347 | id = session->target_id; |
348 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 349 | |
7970634b MC |
350 | if (id != ISCSI_MAX_TARGET) { |
351 | if ((scan_data->channel == SCAN_WILD_CARD || | |
352 | scan_data->channel == 0) && | |
353 | (scan_data->id == SCAN_WILD_CARD || | |
354 | scan_data->id == id)) | |
355 | scsi_scan_target(&session->dev, 0, id, | |
356 | scan_data->lun, 1); | |
357 | } | |
358 | mutex_unlock(&ihost->mutex); | |
30a6c652 MC |
359 | return 0; |
360 | } | |
361 | ||
7970634b MC |
362 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
363 | uint id, uint lun) | |
364 | { | |
365 | struct iscsi_scan_data scan_data; | |
366 | ||
367 | scan_data.channel = channel; | |
368 | scan_data.id = id; | |
369 | scan_data.lun = lun; | |
370 | ||
371 | return device_for_each_child(&shost->shost_gendev, &scan_data, | |
372 | iscsi_user_scan_session); | |
373 | } | |
374 | ||
bd976f62 MC |
375 | static void iscsi_scan_session(struct work_struct *work) |
376 | { | |
377 | struct iscsi_cls_session *session = | |
378 | container_of(work, struct iscsi_cls_session, scan_work); | |
8aae18ad | 379 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 380 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 381 | struct iscsi_scan_data scan_data; |
bd976f62 | 382 | |
7970634b MC |
383 | scan_data.channel = 0; |
384 | scan_data.id = SCAN_WILD_CARD; | |
385 | scan_data.lun = SCAN_WILD_CARD; | |
bd976f62 | 386 | |
7970634b | 387 | iscsi_user_scan_session(&session->dev, &scan_data); |
8aae18ad | 388 | atomic_dec(&ihost->nr_scans); |
bd976f62 MC |
389 | } |
390 | ||
c4028958 | 391 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 392 | { |
c4028958 DH |
393 | struct iscsi_cls_session *session = |
394 | container_of(work, struct iscsi_cls_session, | |
395 | recovery_work.work); | |
6eabafbe | 396 | unsigned long flags; |
30a6c652 | 397 | |
322d739d MC |
398 | iscsi_cls_session_printk(KERN_INFO, session, |
399 | "session recovery timed out after %d secs\n", | |
400 | session->recovery_tmo); | |
30a6c652 | 401 | |
6eabafbe MC |
402 | spin_lock_irqsave(&session->lock, flags); |
403 | switch (session->state) { | |
404 | case ISCSI_SESSION_FAILED: | |
405 | session->state = ISCSI_SESSION_FREE; | |
406 | break; | |
407 | case ISCSI_SESSION_LOGGED_IN: | |
408 | case ISCSI_SESSION_FREE: | |
409 | /* we raced with the unblock's flush */ | |
410 | spin_unlock_irqrestore(&session->lock, flags); | |
411 | return; | |
412 | } | |
413 | spin_unlock_irqrestore(&session->lock, flags); | |
414 | ||
30a6c652 MC |
415 | if (session->transport->session_recovery_timedout) |
416 | session->transport->session_recovery_timedout(session); | |
417 | ||
418 | scsi_target_unblock(&session->dev); | |
419 | } | |
420 | ||
45ab33b6 | 421 | static void __iscsi_unblock_session(struct work_struct *work) |
6eabafbe | 422 | { |
45ab33b6 MC |
423 | struct iscsi_cls_session *session = |
424 | container_of(work, struct iscsi_cls_session, | |
425 | unblock_work); | |
bd976f62 | 426 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 427 | struct iscsi_cls_host *ihost = shost->shost_data; |
6eabafbe MC |
428 | unsigned long flags; |
429 | ||
45ab33b6 MC |
430 | /* |
431 | * The recovery and unblock work get run from the same workqueue, | |
432 | * so try to cancel it if it was going to run after this unblock. | |
433 | */ | |
434 | cancel_delayed_work(&session->recovery_work); | |
6eabafbe MC |
435 | spin_lock_irqsave(&session->lock, flags); |
436 | session->state = ISCSI_SESSION_LOGGED_IN; | |
437 | spin_unlock_irqrestore(&session->lock, flags); | |
45ab33b6 MC |
438 | /* start IO */ |
439 | scsi_target_unblock(&session->dev); | |
8aae18ad MC |
440 | /* |
441 | * Only do kernel scanning if the driver is properly hooked into | |
442 | * the async scanning code (drivers like iscsi_tcp do login and | |
443 | * scanning from userspace). | |
444 | */ | |
445 | if (shost->hostt->scan_finished) { | |
446 | if (queue_work(ihost->scan_workq, &session->scan_work)) | |
447 | atomic_inc(&ihost->nr_scans); | |
448 | } | |
6eabafbe | 449 | } |
45ab33b6 MC |
450 | |
451 | /** | |
452 | * iscsi_unblock_session - set a session as logged in and start IO. | |
453 | * @session: iscsi session | |
454 | * | |
455 | * Mark a session as ready to accept IO. | |
456 | */ | |
457 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
458 | { | |
459 | queue_work(iscsi_eh_timer_workq, &session->unblock_work); | |
460 | /* | |
461 | * make sure all the events have completed before tell the driver | |
462 | * it is safe | |
463 | */ | |
464 | flush_workqueue(iscsi_eh_timer_workq); | |
465 | } | |
30a6c652 MC |
466 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
467 | ||
45ab33b6 | 468 | static void __iscsi_block_session(struct work_struct *work) |
30a6c652 | 469 | { |
45ab33b6 MC |
470 | struct iscsi_cls_session *session = |
471 | container_of(work, struct iscsi_cls_session, | |
472 | block_work); | |
6eabafbe MC |
473 | unsigned long flags; |
474 | ||
475 | spin_lock_irqsave(&session->lock, flags); | |
476 | session->state = ISCSI_SESSION_FAILED; | |
477 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 478 | scsi_target_block(&session->dev); |
d8bf541e MC |
479 | queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work, |
480 | session->recovery_tmo * HZ); | |
30a6c652 | 481 | } |
45ab33b6 MC |
482 | |
483 | void iscsi_block_session(struct iscsi_cls_session *session) | |
484 | { | |
485 | queue_work(iscsi_eh_timer_workq, &session->block_work); | |
486 | } | |
30a6c652 MC |
487 | EXPORT_SYMBOL_GPL(iscsi_block_session); |
488 | ||
26974789 MC |
489 | static void __iscsi_unbind_session(struct work_struct *work) |
490 | { | |
491 | struct iscsi_cls_session *session = | |
492 | container_of(work, struct iscsi_cls_session, | |
493 | unbind_work); | |
494 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 495 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 496 | unsigned long flags; |
26974789 MC |
497 | |
498 | /* Prevent new scans and make sure scanning is not in progress */ | |
499 | mutex_lock(&ihost->mutex); | |
7970634b MC |
500 | spin_lock_irqsave(&session->lock, flags); |
501 | if (session->target_id == ISCSI_MAX_TARGET) { | |
502 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
503 | mutex_unlock(&ihost->mutex); |
504 | return; | |
505 | } | |
7970634b MC |
506 | session->target_id = ISCSI_MAX_TARGET; |
507 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
508 | mutex_unlock(&ihost->mutex); |
509 | ||
510 | scsi_remove_target(&session->dev); | |
511 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
512 | } | |
513 | ||
514 | static int iscsi_unbind_session(struct iscsi_cls_session *session) | |
515 | { | |
516 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 517 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 | 518 | |
bd976f62 | 519 | return queue_work(ihost->scan_workq, &session->unbind_work); |
26974789 MC |
520 | } |
521 | ||
7b8631b5 | 522 | struct iscsi_cls_session * |
5d91e209 MC |
523 | iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
524 | int dd_size) | |
7b8631b5 MC |
525 | { |
526 | struct iscsi_cls_session *session; | |
7b8631b5 | 527 | |
5d91e209 | 528 | session = kzalloc(sizeof(*session) + dd_size, |
b5c7a12d | 529 | GFP_KERNEL); |
7b8631b5 | 530 | if (!session) |
f53a88da MC |
531 | return NULL; |
532 | ||
7b8631b5 | 533 | session->transport = transport; |
30a6c652 | 534 | session->recovery_tmo = 120; |
6eabafbe | 535 | session->state = ISCSI_SESSION_FREE; |
c4028958 | 536 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 | 537 | INIT_LIST_HEAD(&session->sess_list); |
45ab33b6 MC |
538 | INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
539 | INIT_WORK(&session->block_work, __iscsi_block_session); | |
26974789 | 540 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
bd976f62 | 541 | INIT_WORK(&session->scan_work, iscsi_scan_session); |
6eabafbe | 542 | spin_lock_init(&session->lock); |
7b8631b5 | 543 | |
6a8a0d36 MC |
544 | /* this is released in the dev's release function */ |
545 | scsi_host_get(shost); | |
8434aa8b MC |
546 | session->dev.parent = &shost->shost_gendev; |
547 | session->dev.release = iscsi_session_release; | |
548 | device_initialize(&session->dev); | |
5d91e209 | 549 | if (dd_size) |
b5c7a12d | 550 | session->dd_data = &session[1]; |
8434aa8b MC |
551 | return session; |
552 | } | |
553 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
554 | ||
7970634b MC |
555 | static int iscsi_get_next_target_id(struct device *dev, void *data) |
556 | { | |
557 | struct iscsi_cls_session *session; | |
558 | unsigned long flags; | |
559 | int err = 0; | |
560 | ||
561 | if (!iscsi_is_session_dev(dev)) | |
562 | return 0; | |
563 | ||
564 | session = iscsi_dev_to_session(dev); | |
565 | spin_lock_irqsave(&session->lock, flags); | |
566 | if (*((unsigned int *) data) == session->target_id) | |
567 | err = -EEXIST; | |
568 | spin_unlock_irqrestore(&session->lock, flags); | |
569 | return err; | |
570 | } | |
571 | ||
6a8a0d36 | 572 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
573 | { |
574 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 575 | struct iscsi_cls_host *ihost; |
26974789 | 576 | unsigned long flags; |
7970634b | 577 | unsigned int id = target_id; |
8434aa8b | 578 | int err; |
b5c7a12d | 579 | |
30a6c652 | 580 | ihost = shost->shost_data; |
41be1444 | 581 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
7970634b MC |
582 | |
583 | if (id == ISCSI_MAX_TARGET) { | |
584 | for (id = 0; id < ISCSI_MAX_TARGET; id++) { | |
585 | err = device_for_each_child(&shost->shost_gendev, &id, | |
586 | iscsi_get_next_target_id); | |
587 | if (!err) | |
588 | break; | |
589 | } | |
590 | ||
591 | if (id == ISCSI_MAX_TARGET) { | |
592 | iscsi_cls_session_printk(KERN_ERR, session, | |
593 | "Too many iscsi targets. Max " | |
594 | "number of targets is %d.\n", | |
595 | ISCSI_MAX_TARGET - 1); | |
596 | goto release_host; | |
597 | } | |
598 | } | |
599 | session->target_id = id; | |
30a6c652 | 600 | |
b5c7a12d MC |
601 | snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", |
602 | session->sid); | |
8434aa8b | 603 | err = device_add(&session->dev); |
7b8631b5 | 604 | if (err) { |
322d739d MC |
605 | iscsi_cls_session_printk(KERN_ERR, session, |
606 | "could not register session's dev\n"); | |
8434aa8b | 607 | goto release_host; |
7b8631b5 MC |
608 | } |
609 | transport_register_device(&session->dev); | |
610 | ||
26974789 MC |
611 | spin_lock_irqsave(&sesslock, flags); |
612 | list_add(&session->sess_list, &sesslist); | |
613 | spin_unlock_irqrestore(&sesslock, flags); | |
614 | ||
26974789 | 615 | iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); |
8434aa8b | 616 | return 0; |
30a6c652 | 617 | |
8434aa8b MC |
618 | release_host: |
619 | scsi_host_put(shost); | |
620 | return err; | |
7b8631b5 | 621 | } |
8434aa8b | 622 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
623 | |
624 | /** | |
8434aa8b MC |
625 | * iscsi_create_session - create iscsi class session |
626 | * @shost: scsi host | |
627 | * @transport: iscsi transport | |
5d91e209 | 628 | * @dd_size: private driver data size |
eb44820c | 629 | * @target_id: which target |
7b8631b5 | 630 | * |
8434aa8b | 631 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 632 | */ |
8434aa8b | 633 | struct iscsi_cls_session * |
5d91e209 MC |
634 | iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
635 | int dd_size, unsigned int target_id) | |
8434aa8b MC |
636 | { |
637 | struct iscsi_cls_session *session; | |
638 | ||
5d91e209 | 639 | session = iscsi_alloc_session(shost, transport, dd_size); |
8434aa8b MC |
640 | if (!session) |
641 | return NULL; | |
642 | ||
6a8a0d36 | 643 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
644 | iscsi_free_session(session); |
645 | return NULL; | |
646 | } | |
647 | return session; | |
648 | } | |
649 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
650 | ||
26974789 MC |
651 | static void iscsi_conn_release(struct device *dev) |
652 | { | |
653 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
654 | struct device *parent = conn->dev.parent; | |
655 | ||
656 | kfree(conn); | |
657 | put_device(parent); | |
658 | } | |
659 | ||
660 | static int iscsi_is_conn_dev(const struct device *dev) | |
661 | { | |
662 | return dev->release == iscsi_conn_release; | |
663 | } | |
664 | ||
665 | static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) | |
666 | { | |
667 | if (!iscsi_is_conn_dev(dev)) | |
668 | return 0; | |
669 | return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); | |
670 | } | |
671 | ||
8434aa8b | 672 | void iscsi_remove_session(struct iscsi_cls_session *session) |
7b8631b5 | 673 | { |
30a6c652 | 674 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 675 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 MC |
676 | unsigned long flags; |
677 | int err; | |
678 | ||
679 | spin_lock_irqsave(&sesslock, flags); | |
680 | list_del(&session->sess_list); | |
681 | spin_unlock_irqrestore(&sesslock, flags); | |
30a6c652 | 682 | |
45ab33b6 MC |
683 | /* make sure there are no blocks/unblocks queued */ |
684 | flush_workqueue(iscsi_eh_timer_workq); | |
685 | /* make sure the timedout callout is not running */ | |
686 | if (!cancel_delayed_work(&session->recovery_work)) | |
687 | flush_workqueue(iscsi_eh_timer_workq); | |
26974789 MC |
688 | /* |
689 | * If we are blocked let commands flow again. The lld or iscsi | |
690 | * layer should set up the queuecommand to fail commands. | |
45ab33b6 MC |
691 | * We assume that LLD will not be calling block/unblock while |
692 | * removing the session. | |
26974789 | 693 | */ |
6eabafbe MC |
694 | spin_lock_irqsave(&session->lock, flags); |
695 | session->state = ISCSI_SESSION_FREE; | |
696 | spin_unlock_irqrestore(&session->lock, flags); | |
bd976f62 | 697 | |
45ab33b6 MC |
698 | scsi_target_unblock(&session->dev); |
699 | /* flush running scans then delete devices */ | |
bd976f62 | 700 | flush_workqueue(ihost->scan_workq); |
45ab33b6 | 701 | __iscsi_unbind_session(&session->unbind_work); |
30a6c652 | 702 | |
26974789 MC |
703 | /* hw iscsi may not have removed all connections from session */ |
704 | err = device_for_each_child(&session->dev, NULL, | |
705 | iscsi_iter_destroy_conn_fn); | |
706 | if (err) | |
322d739d MC |
707 | iscsi_cls_session_printk(KERN_ERR, session, |
708 | "Could not delete all connections " | |
709 | "for session. Error %d.\n", err); | |
8434aa8b | 710 | |
7b8631b5 | 711 | transport_unregister_device(&session->dev); |
8434aa8b MC |
712 | device_del(&session->dev); |
713 | } | |
714 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
715 | ||
716 | void iscsi_free_session(struct iscsi_cls_session *session) | |
717 | { | |
26974789 | 718 | iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
8434aa8b | 719 | put_device(&session->dev); |
7b8631b5 | 720 | } |
8434aa8b MC |
721 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
722 | ||
723 | /** | |
724 | * iscsi_destroy_session - destroy iscsi session | |
725 | * @session: iscsi_session | |
726 | * | |
727 | * Can be called by a LLD or iscsi_transport. There must not be | |
728 | * any running connections. | |
eb44820c | 729 | */ |
8434aa8b MC |
730 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
731 | { | |
732 | iscsi_remove_session(session); | |
733 | iscsi_free_session(session); | |
734 | return 0; | |
735 | } | |
7b8631b5 MC |
736 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
737 | ||
7b8631b5 MC |
738 | /** |
739 | * iscsi_create_conn - create iscsi class connection | |
740 | * @session: iscsi cls session | |
5d91e209 | 741 | * @dd_size: private driver data size |
7b8631b5 MC |
742 | * @cid: connection id |
743 | * | |
744 | * This can be called from a LLD or iscsi_transport. The connection | |
745 | * is child of the session so cid must be unique for all connections | |
746 | * on the session. | |
b5c7a12d MC |
747 | * |
748 | * Since we do not support MCS, cid will normally be zero. In some cases | |
749 | * for software iscsi we could be trying to preallocate a connection struct | |
750 | * in which case there could be two connection structs and cid would be | |
751 | * non-zero. | |
eb44820c | 752 | */ |
7b8631b5 | 753 | struct iscsi_cls_conn * |
5d91e209 | 754 | iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) |
7b8631b5 MC |
755 | { |
756 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 | 757 | struct iscsi_cls_conn *conn; |
26974789 | 758 | unsigned long flags; |
7b8631b5 MC |
759 | int err; |
760 | ||
5d91e209 | 761 | conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); |
7b8631b5 MC |
762 | if (!conn) |
763 | return NULL; | |
5d91e209 | 764 | if (dd_size) |
7b8631b5 MC |
765 | conn->dd_data = &conn[1]; |
766 | ||
767 | INIT_LIST_HEAD(&conn->conn_list); | |
768 | conn->transport = transport; | |
b5c7a12d | 769 | conn->cid = cid; |
7b8631b5 MC |
770 | |
771 | /* this is released in the dev's release function */ | |
772 | if (!get_device(&session->dev)) | |
43a145a3 | 773 | goto free_conn; |
b5c7a12d | 774 | |
7b8631b5 | 775 | snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u", |
b5c7a12d | 776 | session->sid, cid); |
7b8631b5 MC |
777 | conn->dev.parent = &session->dev; |
778 | conn->dev.release = iscsi_conn_release; | |
779 | err = device_register(&conn->dev); | |
780 | if (err) { | |
322d739d MC |
781 | iscsi_cls_session_printk(KERN_ERR, session, "could not " |
782 | "register connection's dev\n"); | |
7b8631b5 MC |
783 | goto release_parent_ref; |
784 | } | |
785 | transport_register_device(&conn->dev); | |
26974789 MC |
786 | |
787 | spin_lock_irqsave(&connlock, flags); | |
788 | list_add(&conn->conn_list, &connlist); | |
789 | conn->active = 1; | |
790 | spin_unlock_irqrestore(&connlock, flags); | |
7b8631b5 MC |
791 | return conn; |
792 | ||
793 | release_parent_ref: | |
794 | put_device(&session->dev); | |
795 | free_conn: | |
796 | kfree(conn); | |
797 | return NULL; | |
798 | } | |
799 | ||
800 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
801 | ||
802 | /** | |
803 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 804 | * @conn: iscsi cls session |
7b8631b5 | 805 | * |
26974789 | 806 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 807 | */ |
7b8631b5 MC |
808 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
809 | { | |
26974789 MC |
810 | unsigned long flags; |
811 | ||
812 | spin_lock_irqsave(&connlock, flags); | |
813 | conn->active = 0; | |
814 | list_del(&conn->conn_list); | |
815 | spin_unlock_irqrestore(&connlock, flags); | |
816 | ||
7b8631b5 MC |
817 | transport_unregister_device(&conn->dev); |
818 | device_unregister(&conn->dev); | |
819 | return 0; | |
820 | } | |
7b8631b5 MC |
821 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
822 | ||
7b8631b5 MC |
823 | /* |
824 | * iscsi interface functions | |
825 | */ | |
0896b752 AA |
826 | static struct iscsi_internal * |
827 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
828 | { | |
829 | struct iscsi_internal *priv; | |
830 | unsigned long flags; | |
831 | ||
832 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
833 | list_for_each_entry(priv, &iscsi_transports, list) { | |
834 | if (tt == priv->iscsi_transport) { | |
835 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
836 | return priv; | |
837 | } | |
838 | } | |
839 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
840 | return NULL; | |
841 | } | |
1da177e4 | 842 | |
53cb8a1f | 843 | static int |
43a145a3 | 844 | iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp) |
53cb8a1f | 845 | { |
53cb8a1f MC |
846 | int rc; |
847 | ||
9aaa2b46 | 848 | rc = netlink_broadcast(nls, skb, 0, 1, gfp); |
53cb8a1f | 849 | if (rc < 0) { |
53cb8a1f MC |
850 | printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc); |
851 | return rc; | |
852 | } | |
853 | ||
53cb8a1f MC |
854 | return 0; |
855 | } | |
856 | ||
0896b752 | 857 | static int |
43a145a3 | 858 | iscsi_unicast_skb(struct sk_buff *skb, int pid) |
0896b752 | 859 | { |
0896b752 | 860 | int rc; |
1da177e4 | 861 | |
790f39a2 | 862 | rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT); |
0896b752 | 863 | if (rc < 0) { |
0896b752 AA |
864 | printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc); |
865 | return rc; | |
866 | } | |
867 | ||
0896b752 | 868 | return 0; |
1da177e4 | 869 | } |
1da177e4 | 870 | |
7b7232f3 | 871 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 872 | char *data, uint32_t data_size) |
1da177e4 | 873 | { |
0896b752 AA |
874 | struct nlmsghdr *nlh; |
875 | struct sk_buff *skb; | |
876 | struct iscsi_uevent *ev; | |
0896b752 | 877 | char *pdu; |
790f39a2 | 878 | struct iscsi_internal *priv; |
0896b752 AA |
879 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
880 | data_size); | |
881 | ||
790f39a2 MC |
882 | priv = iscsi_if_transport_lookup(conn->transport); |
883 | if (!priv) | |
884 | return -EINVAL; | |
885 | ||
43a145a3 | 886 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 887 | if (!skb) { |
7b7232f3 | 888 | iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED); |
322d739d MC |
889 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
890 | "control PDU: OOM\n"); | |
0896b752 AA |
891 | return -ENOMEM; |
892 | } | |
1da177e4 | 893 | |
790f39a2 | 894 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
895 | ev = NLMSG_DATA(nlh); |
896 | memset(ev, 0, sizeof(*ev)); | |
897 | ev->transport_handle = iscsi_handle(conn->transport); | |
898 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
899 | ev->r.recv_req.cid = conn->cid; |
900 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
901 | pdu = (char*)ev + sizeof(*ev); |
902 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
903 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 904 | |
43a145a3 | 905 | return iscsi_unicast_skb(skb, priv->daemon_pid); |
1da177e4 | 906 | } |
0896b752 | 907 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 908 | |
7b7232f3 | 909 | void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 910 | { |
0896b752 AA |
911 | struct nlmsghdr *nlh; |
912 | struct sk_buff *skb; | |
913 | struct iscsi_uevent *ev; | |
790f39a2 | 914 | struct iscsi_internal *priv; |
0896b752 AA |
915 | int len = NLMSG_SPACE(sizeof(*ev)); |
916 | ||
790f39a2 MC |
917 | priv = iscsi_if_transport_lookup(conn->transport); |
918 | if (!priv) | |
919 | return; | |
920 | ||
43a145a3 | 921 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 922 | if (!skb) { |
322d739d MC |
923 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
924 | "conn error (%d)\n", error); | |
0896b752 AA |
925 | return; |
926 | } | |
927 | ||
790f39a2 | 928 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
929 | ev = NLMSG_DATA(nlh); |
930 | ev->transport_handle = iscsi_handle(conn->transport); | |
931 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 932 | ev->r.connerror.error = error; |
b5c7a12d MC |
933 | ev->r.connerror.cid = conn->cid; |
934 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 935 | |
43a145a3 | 936 | iscsi_broadcast_skb(skb, GFP_ATOMIC); |
1da177e4 | 937 | |
322d739d MC |
938 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
939 | error); | |
0896b752 AA |
940 | } |
941 | EXPORT_SYMBOL_GPL(iscsi_conn_error); | |
942 | ||
943 | static int | |
944 | iscsi_if_send_reply(int pid, int seq, int type, int done, int multi, | |
945 | void *payload, int size) | |
946 | { | |
947 | struct sk_buff *skb; | |
948 | struct nlmsghdr *nlh; | |
949 | int len = NLMSG_SPACE(size); | |
950 | int flags = multi ? NLM_F_MULTI : 0; | |
951 | int t = done ? NLMSG_DONE : type; | |
952 | ||
43a145a3 | 953 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
954 | if (!skb) { |
955 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
956 | return -ENOMEM; | |
957 | } | |
0896b752 AA |
958 | |
959 | nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0); | |
960 | nlh->nlmsg_flags = flags; | |
961 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43a145a3 | 962 | return iscsi_unicast_skb(skb, pid); |
1da177e4 | 963 | } |
1da177e4 | 964 | |
7b8631b5 | 965 | static int |
5b940adf | 966 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
967 | { |
968 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
969 | struct iscsi_stats *stats; | |
970 | struct sk_buff *skbstat; | |
971 | struct iscsi_cls_conn *conn; | |
972 | struct nlmsghdr *nlhstat; | |
973 | struct iscsi_uevent *evstat; | |
790f39a2 | 974 | struct iscsi_internal *priv; |
7b8631b5 MC |
975 | int len = NLMSG_SPACE(sizeof(*ev) + |
976 | sizeof(struct iscsi_stats) + | |
977 | sizeof(struct iscsi_stats_custom) * | |
978 | ISCSI_STATS_CUSTOM_MAX); | |
979 | int err = 0; | |
0896b752 | 980 | |
790f39a2 MC |
981 | priv = iscsi_if_transport_lookup(transport); |
982 | if (!priv) | |
983 | return -EINVAL; | |
984 | ||
b5c7a12d | 985 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
986 | if (!conn) |
987 | return -EEXIST; | |
0896b752 | 988 | |
7b8631b5 MC |
989 | do { |
990 | int actual_size; | |
0896b752 | 991 | |
43a145a3 | 992 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 | 993 | if (!skbstat) { |
322d739d MC |
994 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
995 | "deliver stats: OOM\n"); | |
7b8631b5 MC |
996 | return -ENOMEM; |
997 | } | |
998 | ||
790f39a2 | 999 | nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0, |
7b8631b5 MC |
1000 | (len - sizeof(*nlhstat)), 0); |
1001 | evstat = NLMSG_DATA(nlhstat); | |
1002 | memset(evstat, 0, sizeof(*evstat)); | |
1003 | evstat->transport_handle = iscsi_handle(conn->transport); | |
1004 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
1005 | evstat->u.get_stats.cid = |
1006 | ev->u.get_stats.cid; | |
1007 | evstat->u.get_stats.sid = | |
1008 | ev->u.get_stats.sid; | |
7b8631b5 MC |
1009 | stats = (struct iscsi_stats *) |
1010 | ((char*)evstat + sizeof(*evstat)); | |
1011 | memset(stats, 0, sizeof(*stats)); | |
1012 | ||
7b7232f3 | 1013 | transport->get_stats(conn, stats); |
7b8631b5 MC |
1014 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
1015 | sizeof(struct iscsi_stats) + | |
1016 | sizeof(struct iscsi_stats_custom) * | |
1017 | stats->custom_length); | |
1018 | actual_size -= sizeof(*nlhstat); | |
1019 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 1020 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
1021 | nlhstat->nlmsg_len = actual_size; |
1022 | ||
43a145a3 | 1023 | err = iscsi_unicast_skb(skbstat, priv->daemon_pid); |
7b8631b5 MC |
1024 | } while (err < 0 && err != -ECONNREFUSED); |
1025 | ||
1026 | return err; | |
0896b752 AA |
1027 | } |
1028 | ||
53cb8a1f | 1029 | /** |
26974789 MC |
1030 | * iscsi_session_event - send session destr. completion event |
1031 | * @session: iscsi class session | |
1032 | * @event: type of event | |
eb44820c | 1033 | */ |
26974789 MC |
1034 | int iscsi_session_event(struct iscsi_cls_session *session, |
1035 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
1036 | { |
1037 | struct iscsi_internal *priv; | |
53cb8a1f MC |
1038 | struct Scsi_Host *shost; |
1039 | struct iscsi_uevent *ev; | |
1040 | struct sk_buff *skb; | |
1041 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
1042 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
1043 | ||
26974789 | 1044 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
1045 | if (!priv) |
1046 | return -EINVAL; | |
53cb8a1f MC |
1047 | shost = iscsi_session_to_shost(session); |
1048 | ||
43a145a3 | 1049 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 1050 | if (!skb) { |
322d739d MC |
1051 | iscsi_cls_session_printk(KERN_ERR, session, |
1052 | "Cannot notify userspace of session " | |
1053 | "event %u\n", event); | |
53cb8a1f MC |
1054 | return -ENOMEM; |
1055 | } | |
1056 | ||
1057 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
1058 | ev = NLMSG_DATA(nlh); | |
26974789 | 1059 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 1060 | |
26974789 MC |
1061 | ev->type = event; |
1062 | switch (event) { | |
1063 | case ISCSI_KEVENT_DESTROY_SESSION: | |
1064 | ev->r.d_session.host_no = shost->host_no; | |
1065 | ev->r.d_session.sid = session->sid; | |
1066 | break; | |
1067 | case ISCSI_KEVENT_CREATE_SESSION: | |
1068 | ev->r.c_session_ret.host_no = shost->host_no; | |
1069 | ev->r.c_session_ret.sid = session->sid; | |
1070 | break; | |
1071 | case ISCSI_KEVENT_UNBIND_SESSION: | |
1072 | ev->r.unbind_session.host_no = shost->host_no; | |
1073 | ev->r.unbind_session.sid = session->sid; | |
1074 | break; | |
1075 | default: | |
322d739d MC |
1076 | iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
1077 | "%u.\n", event); | |
26974789 | 1078 | kfree_skb(skb); |
53cb8a1f | 1079 | return -EINVAL; |
53cb8a1f MC |
1080 | } |
1081 | ||
53cb8a1f MC |
1082 | /* |
1083 | * this will occur if the daemon is not up, so we just warn | |
1084 | * the user and when the daemon is restarted it will handle it | |
1085 | */ | |
43a145a3 | 1086 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
53cb8a1f | 1087 | if (rc < 0) |
322d739d MC |
1088 | iscsi_cls_session_printk(KERN_ERR, session, |
1089 | "Cannot notify userspace of session " | |
1090 | "event %u. Check iscsi daemon\n", | |
1091 | event); | |
53cb8a1f MC |
1092 | return rc; |
1093 | } | |
26974789 | 1094 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 1095 | |
0896b752 | 1096 | static int |
40753caa MC |
1097 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev, |
1098 | uint32_t host_no, uint32_t initial_cmdsn, | |
1099 | uint16_t cmds_max, uint16_t queue_depth) | |
0896b752 AA |
1100 | { |
1101 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 1102 | struct iscsi_cls_session *session; |
40753caa | 1103 | struct Scsi_Host *shost = NULL; |
0896b752 | 1104 | |
40753caa MC |
1105 | /* |
1106 | * Software iscsi allocates a host per session, but | |
1107 | * offload drivers (and possibly iser one day) allocate a host per | |
1108 | * hba/nic/rnic. Offload will match a host here, but software will | |
1109 | * return a new hostno after the create_session callback has returned. | |
1110 | */ | |
1111 | if (host_no != UINT_MAX) { | |
1112 | shost = scsi_host_lookup(host_no); | |
1113 | if (IS_ERR(shost)) { | |
1114 | printk(KERN_ERR "Could not find host no %u to " | |
1115 | "create session\n", host_no); | |
1116 | return -ENODEV; | |
1117 | } | |
1118 | } | |
1119 | ||
75613521 | 1120 | session = transport->create_session(shost, cmds_max, queue_depth, |
40753caa MC |
1121 | initial_cmdsn, &host_no); |
1122 | if (shost) | |
1123 | scsi_host_put(shost); | |
7b7232f3 | 1124 | if (!session) |
7b8631b5 | 1125 | return -ENOMEM; |
0896b752 | 1126 | |
40753caa | 1127 | ev->r.c_session_ret.host_no = host_no; |
b5c7a12d | 1128 | ev->r.c_session_ret.sid = session->sid; |
0896b752 | 1129 | return 0; |
0896b752 AA |
1130 | } |
1131 | ||
1132 | static int | |
7b7232f3 | 1133 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 1134 | { |
7b8631b5 | 1135 | struct iscsi_cls_conn *conn; |
7b7232f3 | 1136 | struct iscsi_cls_session *session; |
7b8631b5 | 1137 | |
b5c7a12d MC |
1138 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
1139 | if (!session) { | |
322d739d | 1140 | printk(KERN_ERR "iscsi: invalid session %d.\n", |
b5c7a12d | 1141 | ev->u.c_conn.sid); |
7b8631b5 | 1142 | return -EINVAL; |
b5c7a12d | 1143 | } |
0896b752 | 1144 | |
7b7232f3 | 1145 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d | 1146 | if (!conn) { |
322d739d MC |
1147 | iscsi_cls_session_printk(KERN_ERR, session, |
1148 | "couldn't create a new connection."); | |
7b7232f3 | 1149 | return -ENOMEM; |
b5c7a12d | 1150 | } |
0896b752 | 1151 | |
b5c7a12d MC |
1152 | ev->r.c_conn_ret.sid = session->sid; |
1153 | ev->r.c_conn_ret.cid = conn->cid; | |
0896b752 | 1154 | return 0; |
1da177e4 LT |
1155 | } |
1156 | ||
0896b752 AA |
1157 | static int |
1158 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1159 | { | |
7b8631b5 | 1160 | struct iscsi_cls_conn *conn; |
0896b752 | 1161 | |
b5c7a12d | 1162 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 1163 | if (!conn) |
7b8631b5 | 1164 | return -EINVAL; |
0896b752 | 1165 | |
7b8631b5 MC |
1166 | if (transport->destroy_conn) |
1167 | transport->destroy_conn(conn); | |
7b8631b5 | 1168 | return 0; |
0896b752 AA |
1169 | } |
1170 | ||
fd7255f5 MC |
1171 | static int |
1172 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1173 | { | |
1174 | char *data = (char*)ev + sizeof(*ev); | |
1175 | struct iscsi_cls_conn *conn; | |
1176 | struct iscsi_cls_session *session; | |
a54a52ca | 1177 | int err = 0, value = 0; |
fd7255f5 MC |
1178 | |
1179 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
1180 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
1181 | if (!conn || !session) | |
1182 | return -EINVAL; | |
1183 | ||
1184 | switch (ev->u.set_param.param) { | |
30a6c652 | 1185 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 1186 | sscanf(data, "%d", &value); |
30a6c652 MC |
1187 | if (value != 0) |
1188 | session->recovery_tmo = value; | |
1189 | break; | |
fd7255f5 | 1190 | default: |
a54a52ca MC |
1191 | err = transport->set_param(conn, ev->u.set_param.param, |
1192 | data, ev->u.set_param.len); | |
fd7255f5 MC |
1193 | } |
1194 | ||
1195 | return err; | |
1196 | } | |
1197 | ||
264faaaa OG |
1198 | static int |
1199 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
1200 | struct iscsi_uevent *ev, int msg_type) | |
1201 | { | |
1202 | struct sockaddr *dst_addr; | |
1203 | int rc = 0; | |
1204 | ||
1205 | switch (msg_type) { | |
1206 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: | |
1207 | if (!transport->ep_connect) | |
1208 | return -EINVAL; | |
1209 | ||
1210 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
1211 | rc = transport->ep_connect(dst_addr, | |
1212 | ev->u.ep_connect.non_blocking, | |
1213 | &ev->r.ep_connect_ret.handle); | |
1214 | break; | |
1215 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1216 | if (!transport->ep_poll) | |
1217 | return -EINVAL; | |
1218 | ||
1219 | ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle, | |
1220 | ev->u.ep_poll.timeout_ms); | |
1221 | break; | |
1222 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1223 | if (!transport->ep_disconnect) | |
1224 | return -EINVAL; | |
1225 | ||
1226 | transport->ep_disconnect(ev->u.ep_disconnect.ep_handle); | |
1227 | break; | |
1228 | } | |
1229 | return rc; | |
1230 | } | |
1231 | ||
01cb225d MC |
1232 | static int |
1233 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
1234 | struct iscsi_uevent *ev) | |
1235 | { | |
2174a04e | 1236 | struct Scsi_Host *shost; |
01cb225d | 1237 | struct sockaddr *dst_addr; |
2174a04e | 1238 | int err; |
01cb225d MC |
1239 | |
1240 | if (!transport->tgt_dscvr) | |
1241 | return -EINVAL; | |
1242 | ||
2174a04e MC |
1243 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
1244 | if (IS_ERR(shost)) { | |
1245 | printk(KERN_ERR "target discovery could not find host no %u\n", | |
1246 | ev->u.tgt_dscvr.host_no); | |
1247 | return -ENODEV; | |
1248 | } | |
1249 | ||
1250 | ||
01cb225d | 1251 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
1252 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
1253 | ev->u.tgt_dscvr.enable, dst_addr); | |
1254 | scsi_host_put(shost); | |
1255 | return err; | |
01cb225d MC |
1256 | } |
1257 | ||
1d9bf13a MC |
1258 | static int |
1259 | iscsi_set_host_param(struct iscsi_transport *transport, | |
1260 | struct iscsi_uevent *ev) | |
1261 | { | |
1262 | char *data = (char*)ev + sizeof(*ev); | |
1263 | struct Scsi_Host *shost; | |
1264 | int err; | |
1265 | ||
1266 | if (!transport->set_host_param) | |
1267 | return -ENOSYS; | |
1268 | ||
1269 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
1270 | if (IS_ERR(shost)) { | |
1271 | printk(KERN_ERR "set_host_param could not find host no %u\n", | |
1272 | ev->u.set_host_param.host_no); | |
1273 | return -ENODEV; | |
1274 | } | |
1275 | ||
1276 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1277 | data, ev->u.set_host_param.len); | |
1278 | scsi_host_put(shost); | |
1279 | return err; | |
1280 | } | |
1281 | ||
0896b752 AA |
1282 | static int |
1283 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) | |
1284 | { | |
1285 | int err = 0; | |
40753caa | 1286 | uint32_t host_no = UINT_MAX; |
0896b752 AA |
1287 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); |
1288 | struct iscsi_transport *transport = NULL; | |
1289 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1290 | struct iscsi_cls_session *session; |
1291 | struct iscsi_cls_conn *conn; | |
0896b752 | 1292 | |
0896b752 AA |
1293 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1294 | if (!priv) | |
1295 | return -EINVAL; | |
1296 | transport = priv->iscsi_transport; | |
1297 | ||
7b7232f3 MC |
1298 | if (!try_module_get(transport->owner)) |
1299 | return -EINVAL; | |
1300 | ||
790f39a2 MC |
1301 | priv->daemon_pid = NETLINK_CREDS(skb)->pid; |
1302 | ||
0896b752 AA |
1303 | switch (nlh->nlmsg_type) { |
1304 | case ISCSI_UEVENT_CREATE_SESSION: | |
40753caa MC |
1305 | err = iscsi_if_create_session(priv, ev, host_no, |
1306 | ev->u.c_session.initial_cmdsn, | |
1307 | ev->u.c_session.cmds_max, | |
1308 | ev->u.c_session.queue_depth); | |
1309 | break; | |
1310 | case ISCSI_UEVENT_CREATE_BOUND_SESSION: | |
1311 | err = iscsi_if_create_session(priv, ev, | |
1312 | ev->u.c_bound_session.host_no, | |
1313 | ev->u.c_bound_session.initial_cmdsn, | |
1314 | ev->u.c_bound_session.cmds_max, | |
1315 | ev->u.c_bound_session.queue_depth); | |
0896b752 AA |
1316 | break; |
1317 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1318 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1319 | if (session) |
7b7232f3 | 1320 | transport->destroy_session(session); |
26974789 MC |
1321 | else |
1322 | err = -EINVAL; | |
1323 | break; | |
1324 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1325 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1326 | if (session) | |
1327 | iscsi_unbind_session(session); | |
1328 | else | |
7b7232f3 | 1329 | err = -EINVAL; |
0896b752 AA |
1330 | break; |
1331 | case ISCSI_UEVENT_CREATE_CONN: | |
1332 | err = iscsi_if_create_conn(transport, ev); | |
1333 | break; | |
1334 | case ISCSI_UEVENT_DESTROY_CONN: | |
1335 | err = iscsi_if_destroy_conn(transport, ev); | |
1336 | break; | |
1337 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1338 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1339 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 MC |
1340 | |
1341 | if (session && conn) | |
1342 | ev->r.retcode = transport->bind_conn(session, conn, | |
264faaaa | 1343 | ev->u.b_conn.transport_eph, |
7b7232f3 MC |
1344 | ev->u.b_conn.is_leading); |
1345 | else | |
1346 | err = -EINVAL; | |
0896b752 AA |
1347 | break; |
1348 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1349 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1350 | break; |
1351 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1352 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1353 | if (conn) |
1354 | ev->r.retcode = transport->start_conn(conn); | |
1355 | else | |
1356 | err = -EINVAL; | |
0896b752 AA |
1357 | break; |
1358 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1359 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1360 | if (conn) |
1361 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1362 | else | |
1363 | err = -EINVAL; | |
0896b752 AA |
1364 | break; |
1365 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1366 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1367 | if (conn) |
1368 | ev->r.retcode = transport->send_pdu(conn, | |
1369 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1370 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1371 | ev->u.send_pdu.data_size); | |
1372 | else | |
1373 | err = -EINVAL; | |
0896b752 AA |
1374 | break; |
1375 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1376 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1377 | break; |
264faaaa OG |
1378 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1379 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1380 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1381 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); | |
1382 | break; | |
01cb225d MC |
1383 | case ISCSI_UEVENT_TGT_DSCVR: |
1384 | err = iscsi_tgt_dscvr(transport, ev); | |
1385 | break; | |
1d9bf13a MC |
1386 | case ISCSI_UEVENT_SET_HOST_PARAM: |
1387 | err = iscsi_set_host_param(transport, ev); | |
1388 | break; | |
0896b752 | 1389 | default: |
1d9bf13a | 1390 | err = -ENOSYS; |
0896b752 AA |
1391 | break; |
1392 | } | |
1393 | ||
7b7232f3 | 1394 | module_put(transport->owner); |
0896b752 AA |
1395 | return err; |
1396 | } | |
1397 | ||
b5c7a12d | 1398 | /* |
cd40b7d3 DL |
1399 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
1400 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 1401 | */ |
0896b752 | 1402 | static void |
cd40b7d3 | 1403 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 1404 | { |
0b950672 | 1405 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
1406 | while (skb->len >= NLMSG_SPACE(0)) { |
1407 | int err; | |
1408 | uint32_t rlen; | |
1409 | struct nlmsghdr *nlh; | |
1410 | struct iscsi_uevent *ev; | |
1411 | ||
1412 | nlh = nlmsg_hdr(skb); | |
1413 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
1414 | skb->len < nlh->nlmsg_len) { | |
1415 | break; | |
ee7f8e40 | 1416 | } |
ee7f8e40 | 1417 | |
cd40b7d3 DL |
1418 | ev = NLMSG_DATA(nlh); |
1419 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1420 | if (rlen > skb->len) | |
1421 | rlen = skb->len; | |
0896b752 | 1422 | |
cd40b7d3 DL |
1423 | err = iscsi_if_recv_msg(skb, nlh); |
1424 | if (err) { | |
1425 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1426 | ev->iferror = err; | |
0896b752 | 1427 | } |
cd40b7d3 DL |
1428 | do { |
1429 | /* | |
1430 | * special case for GET_STATS: | |
1431 | * on success - sending reply and stats from | |
1432 | * inside of if_recv_msg(), | |
1433 | * on error - fall through. | |
1434 | */ | |
1435 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1436 | break; | |
1437 | err = iscsi_if_send_reply( | |
1438 | NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq, | |
1439 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); | |
1440 | } while (err < 0 && err != -ECONNREFUSED); | |
1441 | skb_pull(skb, rlen); | |
0896b752 | 1442 | } |
0b950672 | 1443 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1444 | } |
1da177e4 | 1445 | |
fd7255f5 | 1446 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
ee959b00 | 1447 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
fd7255f5 MC |
1448 | __ATTR(_name,_mode,_show,_store) |
1449 | ||
1da177e4 | 1450 | /* |
0896b752 | 1451 | * iSCSI connection attrs |
1da177e4 | 1452 | */ |
a54a52ca | 1453 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1454 | static ssize_t \ |
ee959b00 TJ |
1455 | show_conn_param_##param(struct device *dev, \ |
1456 | struct device_attribute *attr, char *buf) \ | |
0896b752 | 1457 | { \ |
ee959b00 | 1458 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ |
7b8631b5 | 1459 | struct iscsi_transport *t = conn->transport; \ |
a54a52ca | 1460 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1461 | } |
1462 | ||
a54a52ca MC |
1463 | #define iscsi_conn_attr(field, param) \ |
1464 | iscsi_conn_attr_show(param) \ | |
1465 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1466 | NULL); |
0896b752 | 1467 | |
a54a52ca MC |
1468 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1469 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1470 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1471 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1472 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1473 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1474 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
1475 | iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT); | |
1476 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); | |
1477 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
1478 | iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
f6d5180c MC |
1479 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
1480 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 LT |
1481 | |
1482 | /* | |
0896b752 | 1483 | * iSCSI session attrs |
1da177e4 | 1484 | */ |
b2c64167 | 1485 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 1486 | static ssize_t \ |
ee959b00 TJ |
1487 | show_session_param_##param(struct device *dev, \ |
1488 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1489 | { \ |
ee959b00 TJ |
1490 | struct iscsi_cls_session *session = \ |
1491 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 | 1492 | struct iscsi_transport *t = session->transport; \ |
b2c64167 MC |
1493 | \ |
1494 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
1495 | return -EACCES; \ | |
a54a52ca | 1496 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
1497 | } |
1498 | ||
b2c64167 MC |
1499 | #define iscsi_session_attr(field, param, perm) \ |
1500 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 1501 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 MC |
1502 | NULL); |
1503 | ||
b2c64167 MC |
1504 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
1505 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
1506 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
1507 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
1508 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
1509 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
1510 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
1511 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
1512 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
1513 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
1514 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
1515 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
1516 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
1517 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
1518 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
1519 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
1520 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
1da177e4 | 1521 | |
6eabafbe | 1522 | static ssize_t |
ee959b00 TJ |
1523 | show_priv_session_state(struct device *dev, struct device_attribute *attr, |
1524 | char *buf) | |
6eabafbe | 1525 | { |
ee959b00 | 1526 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); |
6eabafbe MC |
1527 | return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); |
1528 | } | |
1529 | static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, | |
1530 | NULL); | |
1531 | ||
fd7255f5 MC |
1532 | #define iscsi_priv_session_attr_show(field, format) \ |
1533 | static ssize_t \ | |
ee959b00 TJ |
1534 | show_priv_session_##field(struct device *dev, \ |
1535 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1536 | { \ |
ee959b00 TJ |
1537 | struct iscsi_cls_session *session = \ |
1538 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 MC |
1539 | return sprintf(buf, format"\n", session->field); \ |
1540 | } | |
1541 | ||
1542 | #define iscsi_priv_session_attr(field, format) \ | |
1543 | iscsi_priv_session_attr_show(field, format) \ | |
1544 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \ | |
1545 | NULL) | |
30a6c652 | 1546 | iscsi_priv_session_attr(recovery_tmo, "%d"); |
fd7255f5 | 1547 | |
1819dc81 MC |
1548 | /* |
1549 | * iSCSI host attrs | |
1550 | */ | |
1551 | #define iscsi_host_attr_show(param) \ | |
1552 | static ssize_t \ | |
ee959b00 TJ |
1553 | show_host_param_##param(struct device *dev, \ |
1554 | struct device_attribute *attr, char *buf) \ | |
1819dc81 | 1555 | { \ |
ee959b00 | 1556 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1819dc81 MC |
1557 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ |
1558 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
1559 | } | |
1560 | ||
1561 | #define iscsi_host_attr(field, param) \ | |
1562 | iscsi_host_attr_show(param) \ | |
1563 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
1564 | NULL); | |
1565 | ||
d8196ed2 | 1566 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 1567 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 1568 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 1569 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 1570 | |
fd7255f5 MC |
1571 | #define SETUP_PRIV_SESSION_RD_ATTR(field) \ |
1572 | do { \ | |
ee959b00 | 1573 | priv->session_attrs[count] = &dev_attr_priv_sess_##field; \ |
fd7255f5 MC |
1574 | count++; \ |
1575 | } while (0) | |
1576 | ||
a54a52ca | 1577 | |
fd7255f5 MC |
1578 | #define SETUP_SESSION_RD_ATTR(field, param_flag) \ |
1579 | do { \ | |
1580 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1581 | priv->session_attrs[count] = &dev_attr_sess_##field; \ |
1da177e4 | 1582 | count++; \ |
fd7255f5 MC |
1583 | } \ |
1584 | } while (0) | |
1585 | ||
fd7255f5 MC |
1586 | #define SETUP_CONN_RD_ATTR(field, param_flag) \ |
1587 | do { \ | |
1588 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1589 | priv->conn_attrs[count] = &dev_attr_conn_##field; \ |
fd7255f5 MC |
1590 | count++; \ |
1591 | } \ | |
1592 | } while (0) | |
1da177e4 | 1593 | |
1819dc81 MC |
1594 | #define SETUP_HOST_RD_ATTR(field, param_flag) \ |
1595 | do { \ | |
1596 | if (tt->host_param_mask & param_flag) { \ | |
ee959b00 | 1597 | priv->host_attrs[count] = &dev_attr_host_##field; \ |
1819dc81 MC |
1598 | count++; \ |
1599 | } \ | |
1600 | } while (0) | |
1601 | ||
0896b752 AA |
1602 | static int iscsi_session_match(struct attribute_container *cont, |
1603 | struct device *dev) | |
1da177e4 | 1604 | { |
7b8631b5 | 1605 | struct iscsi_cls_session *session; |
1da177e4 | 1606 | struct Scsi_Host *shost; |
0896b752 AA |
1607 | struct iscsi_internal *priv; |
1608 | ||
1609 | if (!iscsi_is_session_dev(dev)) | |
1610 | return 0; | |
1da177e4 | 1611 | |
7b8631b5 MC |
1612 | session = iscsi_dev_to_session(dev); |
1613 | shost = iscsi_session_to_shost(session); | |
0896b752 | 1614 | if (!shost->transportt) |
1da177e4 LT |
1615 | return 0; |
1616 | ||
0896b752 AA |
1617 | priv = to_iscsi_internal(shost->transportt); |
1618 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
1619 | return 0; |
1620 | ||
0896b752 | 1621 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
1622 | } |
1623 | ||
0896b752 AA |
1624 | static int iscsi_conn_match(struct attribute_container *cont, |
1625 | struct device *dev) | |
1626 | { | |
7b8631b5 MC |
1627 | struct iscsi_cls_session *session; |
1628 | struct iscsi_cls_conn *conn; | |
1da177e4 | 1629 | struct Scsi_Host *shost; |
0896b752 | 1630 | struct iscsi_internal *priv; |
1da177e4 | 1631 | |
0896b752 | 1632 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
1633 | return 0; |
1634 | ||
7b8631b5 MC |
1635 | conn = iscsi_dev_to_conn(dev); |
1636 | session = iscsi_dev_to_session(conn->dev.parent); | |
1637 | shost = iscsi_session_to_shost(session); | |
1638 | ||
0896b752 | 1639 | if (!shost->transportt) |
1da177e4 LT |
1640 | return 0; |
1641 | ||
0896b752 AA |
1642 | priv = to_iscsi_internal(shost->transportt); |
1643 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
1644 | return 0; | |
1da177e4 | 1645 | |
0896b752 AA |
1646 | return &priv->conn_cont.ac == cont; |
1647 | } | |
1648 | ||
30a6c652 MC |
1649 | static int iscsi_host_match(struct attribute_container *cont, |
1650 | struct device *dev) | |
1651 | { | |
1652 | struct Scsi_Host *shost; | |
1653 | struct iscsi_internal *priv; | |
1654 | ||
1655 | if (!scsi_is_host_device(dev)) | |
1656 | return 0; | |
1657 | ||
1658 | shost = dev_to_shost(dev); | |
1659 | if (!shost->transportt || | |
1660 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
1661 | return 0; | |
1662 | ||
1663 | priv = to_iscsi_internal(shost->transportt); | |
1664 | return &priv->t.host_attrs.ac == cont; | |
1665 | } | |
1666 | ||
7b8631b5 MC |
1667 | struct scsi_transport_template * |
1668 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
1669 | { |
1670 | struct iscsi_internal *priv; | |
1671 | unsigned long flags; | |
1672 | int count = 0, err; | |
1673 | ||
1674 | BUG_ON(!tt); | |
1675 | ||
1676 | priv = iscsi_if_transport_lookup(tt); | |
1677 | if (priv) | |
7b8631b5 | 1678 | return NULL; |
0896b752 | 1679 | |
24669f75 | 1680 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 1681 | if (!priv) |
7b8631b5 | 1682 | return NULL; |
0896b752 | 1683 | INIT_LIST_HEAD(&priv->list); |
53cb8a1f | 1684 | priv->daemon_pid = -1; |
0896b752 | 1685 | priv->iscsi_transport = tt; |
30a6c652 | 1686 | priv->t.user_scan = iscsi_user_scan; |
a4804cd6 MC |
1687 | if (!(tt->caps & CAP_DATA_PATH_OFFLOAD)) |
1688 | priv->t.create_work_queue = 1; | |
0896b752 | 1689 | |
ee959b00 TJ |
1690 | priv->dev.class = &iscsi_transport_class; |
1691 | snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name); | |
1692 | err = device_register(&priv->dev); | |
0896b752 AA |
1693 | if (err) |
1694 | goto free_priv; | |
1695 | ||
ee959b00 | 1696 | err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); |
0896b752 | 1697 | if (err) |
ee959b00 | 1698 | goto unregister_dev; |
0896b752 | 1699 | |
30a6c652 MC |
1700 | /* host parameters */ |
1701 | priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; | |
1702 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; | |
1703 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
32c6e1b9 | 1704 | priv->t.host_size = sizeof(struct iscsi_cls_host); |
30a6c652 MC |
1705 | transport_container_register(&priv->t.host_attrs); |
1706 | ||
d8196ed2 | 1707 | SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); |
22236961 | 1708 | SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS); |
1819dc81 | 1709 | SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS); |
8ad5781a | 1710 | SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME); |
1819dc81 MC |
1711 | BUG_ON(count > ISCSI_HOST_ATTRS); |
1712 | priv->host_attrs[count] = NULL; | |
1713 | count = 0; | |
1714 | ||
0896b752 AA |
1715 | /* connection parameters */ |
1716 | priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; | |
1717 | priv->conn_cont.ac.class = &iscsi_connection_class.class; | |
1718 | priv->conn_cont.ac.match = iscsi_conn_match; | |
1719 | transport_container_register(&priv->conn_cont); | |
1da177e4 | 1720 | |
fd7255f5 MC |
1721 | SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH); |
1722 | SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH); | |
1723 | SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN); | |
1724 | SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN); | |
1725 | SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN); | |
1726 | SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN); | |
1727 | SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS); | |
1728 | SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT); | |
8d2860b3 | 1729 | SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN); |
a54a52ca MC |
1730 | SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS); |
1731 | SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT); | |
f6d5180c MC |
1732 | SETUP_CONN_RD_ATTR(ping_tmo, ISCSI_PING_TMO); |
1733 | SETUP_CONN_RD_ATTR(recv_tmo, ISCSI_RECV_TMO); | |
0896b752 AA |
1734 | |
1735 | BUG_ON(count > ISCSI_CONN_ATTRS); | |
1736 | priv->conn_attrs[count] = NULL; | |
1da177e4 | 1737 | count = 0; |
1da177e4 | 1738 | |
0896b752 AA |
1739 | /* session parameters */ |
1740 | priv->session_cont.ac.attrs = &priv->session_attrs[0]; | |
1741 | priv->session_cont.ac.class = &iscsi_session_class.class; | |
1742 | priv->session_cont.ac.match = iscsi_session_match; | |
1743 | transport_container_register(&priv->session_cont); | |
1744 | ||
fd7255f5 MC |
1745 | SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN); |
1746 | SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T); | |
1747 | SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN); | |
1748 | SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST); | |
1749 | SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST); | |
1750 | SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN); | |
1751 | SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN); | |
1752 | SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL); | |
a54a52ca MC |
1753 | SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME); |
1754 | SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT); | |
b2c64167 MC |
1755 | SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME); |
1756 | SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN); | |
1757 | SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD); | |
1758 | SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN); | |
843c0a8a | 1759 | SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); |
4cd49ea1 MC |
1760 | SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO); |
1761 | SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO); | |
30a6c652 | 1762 | SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); |
6eabafbe | 1763 | SETUP_PRIV_SESSION_RD_ATTR(state); |
fd7255f5 | 1764 | |
0896b752 AA |
1765 | BUG_ON(count > ISCSI_SESSION_ATTRS); |
1766 | priv->session_attrs[count] = NULL; | |
1767 | ||
1768 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1769 | list_add(&priv->list, &iscsi_transports); | |
1770 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1771 | ||
1772 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 1773 | return &priv->t; |
1da177e4 | 1774 | |
ee959b00 TJ |
1775 | unregister_dev: |
1776 | device_unregister(&priv->dev); | |
0896b752 AA |
1777 | free_priv: |
1778 | kfree(priv); | |
7b8631b5 | 1779 | return NULL; |
1da177e4 | 1780 | } |
0896b752 AA |
1781 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
1782 | ||
1783 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
1784 | { | |
1785 | struct iscsi_internal *priv; | |
1786 | unsigned long flags; | |
1787 | ||
1788 | BUG_ON(!tt); | |
1789 | ||
0b950672 | 1790 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
1791 | |
1792 | priv = iscsi_if_transport_lookup(tt); | |
1793 | BUG_ON (!priv); | |
1794 | ||
0896b752 AA |
1795 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
1796 | list_del(&priv->list); | |
1797 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1798 | ||
1799 | transport_container_unregister(&priv->conn_cont); | |
1800 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 1801 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 | 1802 | |
ee959b00 TJ |
1803 | sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); |
1804 | device_unregister(&priv->dev); | |
0b950672 | 1805 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 1806 | |
0896b752 AA |
1807 | return 0; |
1808 | } | |
1809 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 1810 | |
1da177e4 LT |
1811 | static __init int iscsi_transport_init(void) |
1812 | { | |
0896b752 | 1813 | int err; |
1da177e4 | 1814 | |
09492605 | 1815 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
1816 | ISCSI_TRANSPORT_VERSION); |
1817 | ||
41be1444 MC |
1818 | atomic_set(&iscsi_session_nr, 0); |
1819 | ||
0896b752 | 1820 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
1821 | if (err) |
1822 | return err; | |
0896b752 | 1823 | |
30a6c652 | 1824 | err = transport_class_register(&iscsi_host_class); |
0896b752 AA |
1825 | if (err) |
1826 | goto unregister_transport_class; | |
1827 | ||
30a6c652 MC |
1828 | err = transport_class_register(&iscsi_connection_class); |
1829 | if (err) | |
1830 | goto unregister_host_class; | |
1831 | ||
0896b752 AA |
1832 | err = transport_class_register(&iscsi_session_class); |
1833 | if (err) | |
1834 | goto unregister_conn_class; | |
1835 | ||
b4b51029 | 1836 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL, |
7b8631b5 | 1837 | THIS_MODULE); |
0896b752 AA |
1838 | if (!nls) { |
1839 | err = -ENOBUFS; | |
43a145a3 | 1840 | goto unregister_session_class; |
0896b752 AA |
1841 | } |
1842 | ||
d8bf541e MC |
1843 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
1844 | if (!iscsi_eh_timer_workq) | |
1845 | goto release_nls; | |
1846 | ||
43a145a3 | 1847 | return 0; |
0896b752 | 1848 | |
d8bf541e | 1849 | release_nls: |
b7c6ba6e | 1850 | netlink_kernel_release(nls); |
0896b752 AA |
1851 | unregister_session_class: |
1852 | transport_class_unregister(&iscsi_session_class); | |
1853 | unregister_conn_class: | |
1854 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
1855 | unregister_host_class: |
1856 | transport_class_unregister(&iscsi_host_class); | |
0896b752 AA |
1857 | unregister_transport_class: |
1858 | class_unregister(&iscsi_transport_class); | |
1859 | return err; | |
1da177e4 LT |
1860 | } |
1861 | ||
1862 | static void __exit iscsi_transport_exit(void) | |
1863 | { | |
d8bf541e | 1864 | destroy_workqueue(iscsi_eh_timer_workq); |
b7c6ba6e | 1865 | netlink_kernel_release(nls); |
0896b752 AA |
1866 | transport_class_unregister(&iscsi_connection_class); |
1867 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 1868 | transport_class_unregister(&iscsi_host_class); |
0896b752 | 1869 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
1870 | } |
1871 | ||
1872 | module_init(iscsi_transport_init); | |
1873 | module_exit(iscsi_transport_exit); | |
1874 | ||
0896b752 AA |
1875 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
1876 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
1877 | "Alex Aizman <itn780@yahoo.com>"); | |
1878 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 1879 | MODULE_LICENSE("GPL"); |
f4246b33 | 1880 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |