Commit | Line | Data |
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0896b752 | 1 | /* |
1da177e4 LT |
2 | * iSCSI transport class definitions |
3 | * | |
4 | * Copyright (C) IBM Corporation, 2004 | |
0896b752 AA |
5 | * Copyright (C) Mike Christie, 2004 - 2005 |
6 | * Copyright (C) Dmitry Yusupov, 2004 - 2005 | |
7 | * Copyright (C) Alex Aizman, 2004 - 2005 | |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | #include <linux/module.h> | |
0b950672 | 24 | #include <linux/mutex.h> |
0896b752 | 25 | #include <net/tcp.h> |
1da177e4 LT |
26 | #include <scsi/scsi.h> |
27 | #include <scsi/scsi_host.h> | |
28 | #include <scsi/scsi_device.h> | |
29 | #include <scsi/scsi_transport.h> | |
30 | #include <scsi/scsi_transport_iscsi.h> | |
0896b752 | 31 | #include <scsi/iscsi_if.h> |
1da177e4 | 32 | |
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 | |
8aae18ad MC |
282 | /** |
283 | * iscsi_scan_finished - helper to report when running scans are done | |
284 | * @shost: scsi host | |
285 | * @time: scan run time | |
286 | * | |
287 | * This function can be used by drives like qla4xxx to report to the scsi | |
288 | * layer when the scans it kicked off at module load time are done. | |
289 | */ | |
290 | int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
291 | { | |
32c6e1b9 | 292 | struct iscsi_cls_host *ihost = shost->shost_data; |
8aae18ad MC |
293 | /* |
294 | * qla4xxx will have kicked off some session unblocks before calling | |
295 | * scsi_scan_host, so just wait for them to complete. | |
296 | */ | |
297 | return !atomic_read(&ihost->nr_scans); | |
298 | } | |
299 | EXPORT_SYMBOL_GPL(iscsi_scan_finished); | |
300 | ||
30a6c652 MC |
301 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
302 | uint id, uint lun) | |
303 | { | |
32c6e1b9 | 304 | struct iscsi_cls_host *ihost = shost->shost_data; |
30a6c652 MC |
305 | struct iscsi_cls_session *session; |
306 | ||
307 | mutex_lock(&ihost->mutex); | |
308 | list_for_each_entry(session, &ihost->sessions, host_list) { | |
e6f3b63f | 309 | if ((channel == SCAN_WILD_CARD || channel == 0) && |
30a6c652 | 310 | (id == SCAN_WILD_CARD || id == session->target_id)) |
e6f3b63f | 311 | scsi_scan_target(&session->dev, 0, |
30a6c652 MC |
312 | session->target_id, lun, 1); |
313 | } | |
314 | mutex_unlock(&ihost->mutex); | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
bd976f62 MC |
319 | static void iscsi_scan_session(struct work_struct *work) |
320 | { | |
321 | struct iscsi_cls_session *session = | |
322 | container_of(work, struct iscsi_cls_session, scan_work); | |
8aae18ad | 323 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 324 | struct iscsi_cls_host *ihost = shost->shost_data; |
bd976f62 MC |
325 | unsigned long flags; |
326 | ||
327 | spin_lock_irqsave(&session->lock, flags); | |
328 | if (session->state != ISCSI_SESSION_LOGGED_IN) { | |
329 | spin_unlock_irqrestore(&session->lock, flags); | |
8aae18ad | 330 | goto done; |
bd976f62 MC |
331 | } |
332 | spin_unlock_irqrestore(&session->lock, flags); | |
333 | ||
334 | scsi_scan_target(&session->dev, 0, session->target_id, | |
335 | SCAN_WILD_CARD, 1); | |
8aae18ad MC |
336 | done: |
337 | atomic_dec(&ihost->nr_scans); | |
bd976f62 MC |
338 | } |
339 | ||
c4028958 | 340 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 341 | { |
c4028958 DH |
342 | struct iscsi_cls_session *session = |
343 | container_of(work, struct iscsi_cls_session, | |
344 | recovery_work.work); | |
6eabafbe | 345 | unsigned long flags; |
30a6c652 | 346 | |
322d739d MC |
347 | iscsi_cls_session_printk(KERN_INFO, session, |
348 | "session recovery timed out after %d secs\n", | |
349 | session->recovery_tmo); | |
30a6c652 | 350 | |
6eabafbe MC |
351 | spin_lock_irqsave(&session->lock, flags); |
352 | switch (session->state) { | |
353 | case ISCSI_SESSION_FAILED: | |
354 | session->state = ISCSI_SESSION_FREE; | |
355 | break; | |
356 | case ISCSI_SESSION_LOGGED_IN: | |
357 | case ISCSI_SESSION_FREE: | |
358 | /* we raced with the unblock's flush */ | |
359 | spin_unlock_irqrestore(&session->lock, flags); | |
360 | return; | |
361 | } | |
362 | spin_unlock_irqrestore(&session->lock, flags); | |
363 | ||
30a6c652 MC |
364 | if (session->transport->session_recovery_timedout) |
365 | session->transport->session_recovery_timedout(session); | |
366 | ||
367 | scsi_target_unblock(&session->dev); | |
368 | } | |
369 | ||
45ab33b6 | 370 | static void __iscsi_unblock_session(struct work_struct *work) |
6eabafbe | 371 | { |
45ab33b6 MC |
372 | struct iscsi_cls_session *session = |
373 | container_of(work, struct iscsi_cls_session, | |
374 | unblock_work); | |
bd976f62 | 375 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 376 | struct iscsi_cls_host *ihost = shost->shost_data; |
6eabafbe MC |
377 | unsigned long flags; |
378 | ||
45ab33b6 MC |
379 | /* |
380 | * The recovery and unblock work get run from the same workqueue, | |
381 | * so try to cancel it if it was going to run after this unblock. | |
382 | */ | |
383 | cancel_delayed_work(&session->recovery_work); | |
6eabafbe MC |
384 | spin_lock_irqsave(&session->lock, flags); |
385 | session->state = ISCSI_SESSION_LOGGED_IN; | |
386 | spin_unlock_irqrestore(&session->lock, flags); | |
45ab33b6 MC |
387 | /* start IO */ |
388 | scsi_target_unblock(&session->dev); | |
8aae18ad MC |
389 | /* |
390 | * Only do kernel scanning if the driver is properly hooked into | |
391 | * the async scanning code (drivers like iscsi_tcp do login and | |
392 | * scanning from userspace). | |
393 | */ | |
394 | if (shost->hostt->scan_finished) { | |
395 | if (queue_work(ihost->scan_workq, &session->scan_work)) | |
396 | atomic_inc(&ihost->nr_scans); | |
397 | } | |
6eabafbe | 398 | } |
45ab33b6 MC |
399 | |
400 | /** | |
401 | * iscsi_unblock_session - set a session as logged in and start IO. | |
402 | * @session: iscsi session | |
403 | * | |
404 | * Mark a session as ready to accept IO. | |
405 | */ | |
406 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
407 | { | |
408 | queue_work(iscsi_eh_timer_workq, &session->unblock_work); | |
409 | /* | |
410 | * make sure all the events have completed before tell the driver | |
411 | * it is safe | |
412 | */ | |
413 | flush_workqueue(iscsi_eh_timer_workq); | |
414 | } | |
30a6c652 MC |
415 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
416 | ||
45ab33b6 | 417 | static void __iscsi_block_session(struct work_struct *work) |
30a6c652 | 418 | { |
45ab33b6 MC |
419 | struct iscsi_cls_session *session = |
420 | container_of(work, struct iscsi_cls_session, | |
421 | block_work); | |
6eabafbe MC |
422 | unsigned long flags; |
423 | ||
424 | spin_lock_irqsave(&session->lock, flags); | |
425 | session->state = ISCSI_SESSION_FAILED; | |
426 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 427 | scsi_target_block(&session->dev); |
d8bf541e MC |
428 | queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work, |
429 | session->recovery_tmo * HZ); | |
30a6c652 | 430 | } |
45ab33b6 MC |
431 | |
432 | void iscsi_block_session(struct iscsi_cls_session *session) | |
433 | { | |
434 | queue_work(iscsi_eh_timer_workq, &session->block_work); | |
435 | } | |
30a6c652 MC |
436 | EXPORT_SYMBOL_GPL(iscsi_block_session); |
437 | ||
26974789 MC |
438 | static void __iscsi_unbind_session(struct work_struct *work) |
439 | { | |
440 | struct iscsi_cls_session *session = | |
441 | container_of(work, struct iscsi_cls_session, | |
442 | unbind_work); | |
443 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 444 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 MC |
445 | |
446 | /* Prevent new scans and make sure scanning is not in progress */ | |
447 | mutex_lock(&ihost->mutex); | |
448 | if (list_empty(&session->host_list)) { | |
449 | mutex_unlock(&ihost->mutex); | |
450 | return; | |
451 | } | |
452 | list_del_init(&session->host_list); | |
453 | mutex_unlock(&ihost->mutex); | |
454 | ||
455 | scsi_remove_target(&session->dev); | |
456 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
457 | } | |
458 | ||
459 | static int iscsi_unbind_session(struct iscsi_cls_session *session) | |
460 | { | |
461 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 462 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 | 463 | |
bd976f62 | 464 | return queue_work(ihost->scan_workq, &session->unbind_work); |
26974789 MC |
465 | } |
466 | ||
7b8631b5 | 467 | struct iscsi_cls_session * |
8434aa8b MC |
468 | iscsi_alloc_session(struct Scsi_Host *shost, |
469 | struct iscsi_transport *transport) | |
7b8631b5 MC |
470 | { |
471 | struct iscsi_cls_session *session; | |
7b8631b5 | 472 | |
b5c7a12d MC |
473 | session = kzalloc(sizeof(*session) + transport->sessiondata_size, |
474 | GFP_KERNEL); | |
7b8631b5 | 475 | if (!session) |
f53a88da MC |
476 | return NULL; |
477 | ||
7b8631b5 | 478 | session->transport = transport; |
30a6c652 | 479 | session->recovery_tmo = 120; |
6eabafbe | 480 | session->state = ISCSI_SESSION_FREE; |
c4028958 | 481 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 MC |
482 | INIT_LIST_HEAD(&session->host_list); |
483 | INIT_LIST_HEAD(&session->sess_list); | |
45ab33b6 MC |
484 | INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
485 | INIT_WORK(&session->block_work, __iscsi_block_session); | |
26974789 | 486 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
bd976f62 | 487 | INIT_WORK(&session->scan_work, iscsi_scan_session); |
6eabafbe | 488 | spin_lock_init(&session->lock); |
7b8631b5 | 489 | |
6a8a0d36 MC |
490 | /* this is released in the dev's release function */ |
491 | scsi_host_get(shost); | |
8434aa8b MC |
492 | session->dev.parent = &shost->shost_gendev; |
493 | session->dev.release = iscsi_session_release; | |
494 | device_initialize(&session->dev); | |
b5c7a12d MC |
495 | if (transport->sessiondata_size) |
496 | session->dd_data = &session[1]; | |
8434aa8b MC |
497 | return session; |
498 | } | |
499 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
500 | ||
6a8a0d36 | 501 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
502 | { |
503 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 504 | struct iscsi_cls_host *ihost; |
26974789 | 505 | unsigned long flags; |
8434aa8b | 506 | int err; |
b5c7a12d | 507 | |
30a6c652 | 508 | ihost = shost->shost_data; |
41be1444 | 509 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
6a8a0d36 | 510 | session->target_id = target_id; |
30a6c652 | 511 | |
b5c7a12d MC |
512 | snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", |
513 | session->sid); | |
8434aa8b | 514 | err = device_add(&session->dev); |
7b8631b5 | 515 | if (err) { |
322d739d MC |
516 | iscsi_cls_session_printk(KERN_ERR, session, |
517 | "could not register session's dev\n"); | |
8434aa8b | 518 | goto release_host; |
7b8631b5 MC |
519 | } |
520 | transport_register_device(&session->dev); | |
521 | ||
26974789 MC |
522 | spin_lock_irqsave(&sesslock, flags); |
523 | list_add(&session->sess_list, &sesslist); | |
524 | spin_unlock_irqrestore(&sesslock, flags); | |
525 | ||
30a6c652 MC |
526 | mutex_lock(&ihost->mutex); |
527 | list_add(&session->host_list, &ihost->sessions); | |
528 | mutex_unlock(&ihost->mutex); | |
26974789 MC |
529 | |
530 | iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); | |
8434aa8b | 531 | return 0; |
30a6c652 | 532 | |
8434aa8b MC |
533 | release_host: |
534 | scsi_host_put(shost); | |
535 | return err; | |
7b8631b5 | 536 | } |
8434aa8b | 537 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
538 | |
539 | /** | |
8434aa8b MC |
540 | * iscsi_create_session - create iscsi class session |
541 | * @shost: scsi host | |
542 | * @transport: iscsi transport | |
eb44820c | 543 | * @target_id: which target |
7b8631b5 | 544 | * |
8434aa8b | 545 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 546 | */ |
8434aa8b MC |
547 | struct iscsi_cls_session * |
548 | iscsi_create_session(struct Scsi_Host *shost, | |
6a8a0d36 MC |
549 | struct iscsi_transport *transport, |
550 | unsigned int target_id) | |
8434aa8b MC |
551 | { |
552 | struct iscsi_cls_session *session; | |
553 | ||
554 | session = iscsi_alloc_session(shost, transport); | |
555 | if (!session) | |
556 | return NULL; | |
557 | ||
6a8a0d36 | 558 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
559 | iscsi_free_session(session); |
560 | return NULL; | |
561 | } | |
562 | return session; | |
563 | } | |
564 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
565 | ||
26974789 MC |
566 | static void iscsi_conn_release(struct device *dev) |
567 | { | |
568 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
569 | struct device *parent = conn->dev.parent; | |
570 | ||
571 | kfree(conn); | |
572 | put_device(parent); | |
573 | } | |
574 | ||
575 | static int iscsi_is_conn_dev(const struct device *dev) | |
576 | { | |
577 | return dev->release == iscsi_conn_release; | |
578 | } | |
579 | ||
580 | static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) | |
581 | { | |
582 | if (!iscsi_is_conn_dev(dev)) | |
583 | return 0; | |
584 | return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); | |
585 | } | |
586 | ||
8434aa8b | 587 | void iscsi_remove_session(struct iscsi_cls_session *session) |
7b8631b5 | 588 | { |
30a6c652 | 589 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 590 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 MC |
591 | unsigned long flags; |
592 | int err; | |
593 | ||
594 | spin_lock_irqsave(&sesslock, flags); | |
595 | list_del(&session->sess_list); | |
596 | spin_unlock_irqrestore(&sesslock, flags); | |
30a6c652 | 597 | |
45ab33b6 MC |
598 | /* make sure there are no blocks/unblocks queued */ |
599 | flush_workqueue(iscsi_eh_timer_workq); | |
600 | /* make sure the timedout callout is not running */ | |
601 | if (!cancel_delayed_work(&session->recovery_work)) | |
602 | flush_workqueue(iscsi_eh_timer_workq); | |
26974789 MC |
603 | /* |
604 | * If we are blocked let commands flow again. The lld or iscsi | |
605 | * layer should set up the queuecommand to fail commands. | |
45ab33b6 MC |
606 | * We assume that LLD will not be calling block/unblock while |
607 | * removing the session. | |
26974789 | 608 | */ |
6eabafbe MC |
609 | spin_lock_irqsave(&session->lock, flags); |
610 | session->state = ISCSI_SESSION_FREE; | |
611 | spin_unlock_irqrestore(&session->lock, flags); | |
bd976f62 | 612 | |
45ab33b6 MC |
613 | scsi_target_unblock(&session->dev); |
614 | /* flush running scans then delete devices */ | |
bd976f62 | 615 | flush_workqueue(ihost->scan_workq); |
45ab33b6 | 616 | __iscsi_unbind_session(&session->unbind_work); |
30a6c652 | 617 | |
26974789 MC |
618 | /* hw iscsi may not have removed all connections from session */ |
619 | err = device_for_each_child(&session->dev, NULL, | |
620 | iscsi_iter_destroy_conn_fn); | |
621 | if (err) | |
322d739d MC |
622 | iscsi_cls_session_printk(KERN_ERR, session, |
623 | "Could not delete all connections " | |
624 | "for session. Error %d.\n", err); | |
8434aa8b | 625 | |
7b8631b5 | 626 | transport_unregister_device(&session->dev); |
8434aa8b MC |
627 | device_del(&session->dev); |
628 | } | |
629 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
630 | ||
631 | void iscsi_free_session(struct iscsi_cls_session *session) | |
632 | { | |
26974789 | 633 | iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
8434aa8b | 634 | put_device(&session->dev); |
7b8631b5 | 635 | } |
8434aa8b MC |
636 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
637 | ||
638 | /** | |
639 | * iscsi_destroy_session - destroy iscsi session | |
640 | * @session: iscsi_session | |
641 | * | |
642 | * Can be called by a LLD or iscsi_transport. There must not be | |
643 | * any running connections. | |
eb44820c | 644 | */ |
8434aa8b MC |
645 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
646 | { | |
647 | iscsi_remove_session(session); | |
648 | iscsi_free_session(session); | |
649 | return 0; | |
650 | } | |
7b8631b5 MC |
651 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
652 | ||
7b8631b5 MC |
653 | /** |
654 | * iscsi_create_conn - create iscsi class connection | |
655 | * @session: iscsi cls session | |
656 | * @cid: connection id | |
657 | * | |
658 | * This can be called from a LLD or iscsi_transport. The connection | |
659 | * is child of the session so cid must be unique for all connections | |
660 | * on the session. | |
b5c7a12d MC |
661 | * |
662 | * Since we do not support MCS, cid will normally be zero. In some cases | |
663 | * for software iscsi we could be trying to preallocate a connection struct | |
664 | * in which case there could be two connection structs and cid would be | |
665 | * non-zero. | |
eb44820c | 666 | */ |
7b8631b5 MC |
667 | struct iscsi_cls_conn * |
668 | iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid) | |
669 | { | |
670 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 | 671 | struct iscsi_cls_conn *conn; |
26974789 | 672 | unsigned long flags; |
7b8631b5 MC |
673 | int err; |
674 | ||
675 | conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL); | |
676 | if (!conn) | |
677 | return NULL; | |
678 | ||
679 | if (transport->conndata_size) | |
680 | conn->dd_data = &conn[1]; | |
681 | ||
682 | INIT_LIST_HEAD(&conn->conn_list); | |
683 | conn->transport = transport; | |
b5c7a12d | 684 | conn->cid = cid; |
7b8631b5 MC |
685 | |
686 | /* this is released in the dev's release function */ | |
687 | if (!get_device(&session->dev)) | |
43a145a3 | 688 | goto free_conn; |
b5c7a12d | 689 | |
7b8631b5 | 690 | snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u", |
b5c7a12d | 691 | session->sid, cid); |
7b8631b5 MC |
692 | conn->dev.parent = &session->dev; |
693 | conn->dev.release = iscsi_conn_release; | |
694 | err = device_register(&conn->dev); | |
695 | if (err) { | |
322d739d MC |
696 | iscsi_cls_session_printk(KERN_ERR, session, "could not " |
697 | "register connection's dev\n"); | |
7b8631b5 MC |
698 | goto release_parent_ref; |
699 | } | |
700 | transport_register_device(&conn->dev); | |
26974789 MC |
701 | |
702 | spin_lock_irqsave(&connlock, flags); | |
703 | list_add(&conn->conn_list, &connlist); | |
704 | conn->active = 1; | |
705 | spin_unlock_irqrestore(&connlock, flags); | |
7b8631b5 MC |
706 | return conn; |
707 | ||
708 | release_parent_ref: | |
709 | put_device(&session->dev); | |
710 | free_conn: | |
711 | kfree(conn); | |
712 | return NULL; | |
713 | } | |
714 | ||
715 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
716 | ||
717 | /** | |
718 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 719 | * @conn: iscsi cls session |
7b8631b5 | 720 | * |
26974789 | 721 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 722 | */ |
7b8631b5 MC |
723 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
724 | { | |
26974789 MC |
725 | unsigned long flags; |
726 | ||
727 | spin_lock_irqsave(&connlock, flags); | |
728 | conn->active = 0; | |
729 | list_del(&conn->conn_list); | |
730 | spin_unlock_irqrestore(&connlock, flags); | |
731 | ||
7b8631b5 MC |
732 | transport_unregister_device(&conn->dev); |
733 | device_unregister(&conn->dev); | |
734 | return 0; | |
735 | } | |
7b8631b5 MC |
736 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
737 | ||
7b8631b5 MC |
738 | /* |
739 | * iscsi interface functions | |
740 | */ | |
0896b752 AA |
741 | static struct iscsi_internal * |
742 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
743 | { | |
744 | struct iscsi_internal *priv; | |
745 | unsigned long flags; | |
746 | ||
747 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
748 | list_for_each_entry(priv, &iscsi_transports, list) { | |
749 | if (tt == priv->iscsi_transport) { | |
750 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
751 | return priv; | |
752 | } | |
753 | } | |
754 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
755 | return NULL; | |
756 | } | |
1da177e4 | 757 | |
53cb8a1f | 758 | static int |
43a145a3 | 759 | iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp) |
53cb8a1f | 760 | { |
53cb8a1f MC |
761 | int rc; |
762 | ||
9aaa2b46 | 763 | rc = netlink_broadcast(nls, skb, 0, 1, gfp); |
53cb8a1f | 764 | if (rc < 0) { |
53cb8a1f MC |
765 | printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc); |
766 | return rc; | |
767 | } | |
768 | ||
53cb8a1f MC |
769 | return 0; |
770 | } | |
771 | ||
0896b752 | 772 | static int |
43a145a3 | 773 | iscsi_unicast_skb(struct sk_buff *skb, int pid) |
0896b752 | 774 | { |
0896b752 | 775 | int rc; |
1da177e4 | 776 | |
790f39a2 | 777 | rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT); |
0896b752 | 778 | if (rc < 0) { |
0896b752 AA |
779 | printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc); |
780 | return rc; | |
781 | } | |
782 | ||
0896b752 | 783 | return 0; |
1da177e4 | 784 | } |
1da177e4 | 785 | |
7b7232f3 | 786 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 787 | char *data, uint32_t data_size) |
1da177e4 | 788 | { |
0896b752 AA |
789 | struct nlmsghdr *nlh; |
790 | struct sk_buff *skb; | |
791 | struct iscsi_uevent *ev; | |
0896b752 | 792 | char *pdu; |
790f39a2 | 793 | struct iscsi_internal *priv; |
0896b752 AA |
794 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
795 | data_size); | |
796 | ||
790f39a2 MC |
797 | priv = iscsi_if_transport_lookup(conn->transport); |
798 | if (!priv) | |
799 | return -EINVAL; | |
800 | ||
43a145a3 | 801 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 802 | if (!skb) { |
7b7232f3 | 803 | iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED); |
322d739d MC |
804 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
805 | "control PDU: OOM\n"); | |
0896b752 AA |
806 | return -ENOMEM; |
807 | } | |
1da177e4 | 808 | |
790f39a2 | 809 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
810 | ev = NLMSG_DATA(nlh); |
811 | memset(ev, 0, sizeof(*ev)); | |
812 | ev->transport_handle = iscsi_handle(conn->transport); | |
813 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
814 | ev->r.recv_req.cid = conn->cid; |
815 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
816 | pdu = (char*)ev + sizeof(*ev); |
817 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
818 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 819 | |
43a145a3 | 820 | return iscsi_unicast_skb(skb, priv->daemon_pid); |
1da177e4 | 821 | } |
0896b752 | 822 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 823 | |
7b7232f3 | 824 | void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 825 | { |
0896b752 AA |
826 | struct nlmsghdr *nlh; |
827 | struct sk_buff *skb; | |
828 | struct iscsi_uevent *ev; | |
790f39a2 | 829 | struct iscsi_internal *priv; |
0896b752 AA |
830 | int len = NLMSG_SPACE(sizeof(*ev)); |
831 | ||
790f39a2 MC |
832 | priv = iscsi_if_transport_lookup(conn->transport); |
833 | if (!priv) | |
834 | return; | |
835 | ||
43a145a3 | 836 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 837 | if (!skb) { |
322d739d MC |
838 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
839 | "conn error (%d)\n", error); | |
0896b752 AA |
840 | return; |
841 | } | |
842 | ||
790f39a2 | 843 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
844 | ev = NLMSG_DATA(nlh); |
845 | ev->transport_handle = iscsi_handle(conn->transport); | |
846 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 847 | ev->r.connerror.error = error; |
b5c7a12d MC |
848 | ev->r.connerror.cid = conn->cid; |
849 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 850 | |
43a145a3 | 851 | iscsi_broadcast_skb(skb, GFP_ATOMIC); |
1da177e4 | 852 | |
322d739d MC |
853 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
854 | error); | |
0896b752 AA |
855 | } |
856 | EXPORT_SYMBOL_GPL(iscsi_conn_error); | |
857 | ||
858 | static int | |
859 | iscsi_if_send_reply(int pid, int seq, int type, int done, int multi, | |
860 | void *payload, int size) | |
861 | { | |
862 | struct sk_buff *skb; | |
863 | struct nlmsghdr *nlh; | |
864 | int len = NLMSG_SPACE(size); | |
865 | int flags = multi ? NLM_F_MULTI : 0; | |
866 | int t = done ? NLMSG_DONE : type; | |
867 | ||
43a145a3 | 868 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
869 | if (!skb) { |
870 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
871 | return -ENOMEM; | |
872 | } | |
0896b752 AA |
873 | |
874 | nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0); | |
875 | nlh->nlmsg_flags = flags; | |
876 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43a145a3 | 877 | return iscsi_unicast_skb(skb, pid); |
1da177e4 | 878 | } |
1da177e4 | 879 | |
7b8631b5 | 880 | static int |
5b940adf | 881 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
882 | { |
883 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
884 | struct iscsi_stats *stats; | |
885 | struct sk_buff *skbstat; | |
886 | struct iscsi_cls_conn *conn; | |
887 | struct nlmsghdr *nlhstat; | |
888 | struct iscsi_uevent *evstat; | |
790f39a2 | 889 | struct iscsi_internal *priv; |
7b8631b5 MC |
890 | int len = NLMSG_SPACE(sizeof(*ev) + |
891 | sizeof(struct iscsi_stats) + | |
892 | sizeof(struct iscsi_stats_custom) * | |
893 | ISCSI_STATS_CUSTOM_MAX); | |
894 | int err = 0; | |
0896b752 | 895 | |
790f39a2 MC |
896 | priv = iscsi_if_transport_lookup(transport); |
897 | if (!priv) | |
898 | return -EINVAL; | |
899 | ||
b5c7a12d | 900 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
901 | if (!conn) |
902 | return -EEXIST; | |
0896b752 | 903 | |
7b8631b5 MC |
904 | do { |
905 | int actual_size; | |
0896b752 | 906 | |
43a145a3 | 907 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 | 908 | if (!skbstat) { |
322d739d MC |
909 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
910 | "deliver stats: OOM\n"); | |
7b8631b5 MC |
911 | return -ENOMEM; |
912 | } | |
913 | ||
790f39a2 | 914 | nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0, |
7b8631b5 MC |
915 | (len - sizeof(*nlhstat)), 0); |
916 | evstat = NLMSG_DATA(nlhstat); | |
917 | memset(evstat, 0, sizeof(*evstat)); | |
918 | evstat->transport_handle = iscsi_handle(conn->transport); | |
919 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
920 | evstat->u.get_stats.cid = |
921 | ev->u.get_stats.cid; | |
922 | evstat->u.get_stats.sid = | |
923 | ev->u.get_stats.sid; | |
7b8631b5 MC |
924 | stats = (struct iscsi_stats *) |
925 | ((char*)evstat + sizeof(*evstat)); | |
926 | memset(stats, 0, sizeof(*stats)); | |
927 | ||
7b7232f3 | 928 | transport->get_stats(conn, stats); |
7b8631b5 MC |
929 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
930 | sizeof(struct iscsi_stats) + | |
931 | sizeof(struct iscsi_stats_custom) * | |
932 | stats->custom_length); | |
933 | actual_size -= sizeof(*nlhstat); | |
934 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 935 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
936 | nlhstat->nlmsg_len = actual_size; |
937 | ||
43a145a3 | 938 | err = iscsi_unicast_skb(skbstat, priv->daemon_pid); |
7b8631b5 MC |
939 | } while (err < 0 && err != -ECONNREFUSED); |
940 | ||
941 | return err; | |
0896b752 AA |
942 | } |
943 | ||
53cb8a1f | 944 | /** |
26974789 MC |
945 | * iscsi_session_event - send session destr. completion event |
946 | * @session: iscsi class session | |
947 | * @event: type of event | |
eb44820c | 948 | */ |
26974789 MC |
949 | int iscsi_session_event(struct iscsi_cls_session *session, |
950 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
951 | { |
952 | struct iscsi_internal *priv; | |
53cb8a1f MC |
953 | struct Scsi_Host *shost; |
954 | struct iscsi_uevent *ev; | |
955 | struct sk_buff *skb; | |
956 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
957 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
958 | ||
26974789 | 959 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
960 | if (!priv) |
961 | return -EINVAL; | |
53cb8a1f MC |
962 | shost = iscsi_session_to_shost(session); |
963 | ||
43a145a3 | 964 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 965 | if (!skb) { |
322d739d MC |
966 | iscsi_cls_session_printk(KERN_ERR, session, |
967 | "Cannot notify userspace of session " | |
968 | "event %u\n", event); | |
53cb8a1f MC |
969 | return -ENOMEM; |
970 | } | |
971 | ||
972 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
973 | ev = NLMSG_DATA(nlh); | |
26974789 | 974 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 975 | |
26974789 MC |
976 | ev->type = event; |
977 | switch (event) { | |
978 | case ISCSI_KEVENT_DESTROY_SESSION: | |
979 | ev->r.d_session.host_no = shost->host_no; | |
980 | ev->r.d_session.sid = session->sid; | |
981 | break; | |
982 | case ISCSI_KEVENT_CREATE_SESSION: | |
983 | ev->r.c_session_ret.host_no = shost->host_no; | |
984 | ev->r.c_session_ret.sid = session->sid; | |
985 | break; | |
986 | case ISCSI_KEVENT_UNBIND_SESSION: | |
987 | ev->r.unbind_session.host_no = shost->host_no; | |
988 | ev->r.unbind_session.sid = session->sid; | |
989 | break; | |
990 | default: | |
322d739d MC |
991 | iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
992 | "%u.\n", event); | |
26974789 | 993 | kfree_skb(skb); |
53cb8a1f | 994 | return -EINVAL; |
53cb8a1f MC |
995 | } |
996 | ||
53cb8a1f MC |
997 | /* |
998 | * this will occur if the daemon is not up, so we just warn | |
999 | * the user and when the daemon is restarted it will handle it | |
1000 | */ | |
43a145a3 | 1001 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
53cb8a1f | 1002 | if (rc < 0) |
322d739d MC |
1003 | iscsi_cls_session_printk(KERN_ERR, session, |
1004 | "Cannot notify userspace of session " | |
1005 | "event %u. Check iscsi daemon\n", | |
1006 | event); | |
53cb8a1f MC |
1007 | return rc; |
1008 | } | |
26974789 | 1009 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 1010 | |
0896b752 | 1011 | static int |
40753caa MC |
1012 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev, |
1013 | uint32_t host_no, uint32_t initial_cmdsn, | |
1014 | uint16_t cmds_max, uint16_t queue_depth) | |
0896b752 AA |
1015 | { |
1016 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 1017 | struct iscsi_cls_session *session; |
40753caa | 1018 | struct Scsi_Host *shost = NULL; |
0896b752 | 1019 | |
40753caa MC |
1020 | /* |
1021 | * Software iscsi allocates a host per session, but | |
1022 | * offload drivers (and possibly iser one day) allocate a host per | |
1023 | * hba/nic/rnic. Offload will match a host here, but software will | |
1024 | * return a new hostno after the create_session callback has returned. | |
1025 | */ | |
1026 | if (host_no != UINT_MAX) { | |
1027 | shost = scsi_host_lookup(host_no); | |
1028 | if (IS_ERR(shost)) { | |
1029 | printk(KERN_ERR "Could not find host no %u to " | |
1030 | "create session\n", host_no); | |
1031 | return -ENODEV; | |
1032 | } | |
1033 | } | |
1034 | ||
75613521 | 1035 | session = transport->create_session(shost, cmds_max, queue_depth, |
40753caa MC |
1036 | initial_cmdsn, &host_no); |
1037 | if (shost) | |
1038 | scsi_host_put(shost); | |
7b7232f3 | 1039 | if (!session) |
7b8631b5 | 1040 | return -ENOMEM; |
0896b752 | 1041 | |
40753caa | 1042 | ev->r.c_session_ret.host_no = host_no; |
b5c7a12d | 1043 | ev->r.c_session_ret.sid = session->sid; |
0896b752 | 1044 | return 0; |
0896b752 AA |
1045 | } |
1046 | ||
1047 | static int | |
7b7232f3 | 1048 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 1049 | { |
7b8631b5 | 1050 | struct iscsi_cls_conn *conn; |
7b7232f3 | 1051 | struct iscsi_cls_session *session; |
7b8631b5 | 1052 | |
b5c7a12d MC |
1053 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
1054 | if (!session) { | |
322d739d | 1055 | printk(KERN_ERR "iscsi: invalid session %d.\n", |
b5c7a12d | 1056 | ev->u.c_conn.sid); |
7b8631b5 | 1057 | return -EINVAL; |
b5c7a12d | 1058 | } |
0896b752 | 1059 | |
7b7232f3 | 1060 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d | 1061 | if (!conn) { |
322d739d MC |
1062 | iscsi_cls_session_printk(KERN_ERR, session, |
1063 | "couldn't create a new connection."); | |
7b7232f3 | 1064 | return -ENOMEM; |
b5c7a12d | 1065 | } |
0896b752 | 1066 | |
b5c7a12d MC |
1067 | ev->r.c_conn_ret.sid = session->sid; |
1068 | ev->r.c_conn_ret.cid = conn->cid; | |
0896b752 | 1069 | return 0; |
1da177e4 LT |
1070 | } |
1071 | ||
0896b752 AA |
1072 | static int |
1073 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1074 | { | |
7b8631b5 | 1075 | struct iscsi_cls_conn *conn; |
0896b752 | 1076 | |
b5c7a12d | 1077 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 1078 | if (!conn) |
7b8631b5 | 1079 | return -EINVAL; |
0896b752 | 1080 | |
7b8631b5 MC |
1081 | if (transport->destroy_conn) |
1082 | transport->destroy_conn(conn); | |
7b8631b5 | 1083 | return 0; |
0896b752 AA |
1084 | } |
1085 | ||
fd7255f5 MC |
1086 | static int |
1087 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1088 | { | |
1089 | char *data = (char*)ev + sizeof(*ev); | |
1090 | struct iscsi_cls_conn *conn; | |
1091 | struct iscsi_cls_session *session; | |
a54a52ca | 1092 | int err = 0, value = 0; |
fd7255f5 MC |
1093 | |
1094 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
1095 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
1096 | if (!conn || !session) | |
1097 | return -EINVAL; | |
1098 | ||
1099 | switch (ev->u.set_param.param) { | |
30a6c652 | 1100 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 1101 | sscanf(data, "%d", &value); |
30a6c652 MC |
1102 | if (value != 0) |
1103 | session->recovery_tmo = value; | |
1104 | break; | |
fd7255f5 | 1105 | default: |
a54a52ca MC |
1106 | err = transport->set_param(conn, ev->u.set_param.param, |
1107 | data, ev->u.set_param.len); | |
fd7255f5 MC |
1108 | } |
1109 | ||
1110 | return err; | |
1111 | } | |
1112 | ||
264faaaa OG |
1113 | static int |
1114 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
1115 | struct iscsi_uevent *ev, int msg_type) | |
1116 | { | |
1117 | struct sockaddr *dst_addr; | |
1118 | int rc = 0; | |
1119 | ||
1120 | switch (msg_type) { | |
1121 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: | |
1122 | if (!transport->ep_connect) | |
1123 | return -EINVAL; | |
1124 | ||
1125 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
1126 | rc = transport->ep_connect(dst_addr, | |
1127 | ev->u.ep_connect.non_blocking, | |
1128 | &ev->r.ep_connect_ret.handle); | |
1129 | break; | |
1130 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1131 | if (!transport->ep_poll) | |
1132 | return -EINVAL; | |
1133 | ||
1134 | ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle, | |
1135 | ev->u.ep_poll.timeout_ms); | |
1136 | break; | |
1137 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1138 | if (!transport->ep_disconnect) | |
1139 | return -EINVAL; | |
1140 | ||
1141 | transport->ep_disconnect(ev->u.ep_disconnect.ep_handle); | |
1142 | break; | |
1143 | } | |
1144 | return rc; | |
1145 | } | |
1146 | ||
01cb225d MC |
1147 | static int |
1148 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
1149 | struct iscsi_uevent *ev) | |
1150 | { | |
2174a04e | 1151 | struct Scsi_Host *shost; |
01cb225d | 1152 | struct sockaddr *dst_addr; |
2174a04e | 1153 | int err; |
01cb225d MC |
1154 | |
1155 | if (!transport->tgt_dscvr) | |
1156 | return -EINVAL; | |
1157 | ||
2174a04e MC |
1158 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
1159 | if (IS_ERR(shost)) { | |
1160 | printk(KERN_ERR "target discovery could not find host no %u\n", | |
1161 | ev->u.tgt_dscvr.host_no); | |
1162 | return -ENODEV; | |
1163 | } | |
1164 | ||
1165 | ||
01cb225d | 1166 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
1167 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
1168 | ev->u.tgt_dscvr.enable, dst_addr); | |
1169 | scsi_host_put(shost); | |
1170 | return err; | |
01cb225d MC |
1171 | } |
1172 | ||
1d9bf13a MC |
1173 | static int |
1174 | iscsi_set_host_param(struct iscsi_transport *transport, | |
1175 | struct iscsi_uevent *ev) | |
1176 | { | |
1177 | char *data = (char*)ev + sizeof(*ev); | |
1178 | struct Scsi_Host *shost; | |
1179 | int err; | |
1180 | ||
1181 | if (!transport->set_host_param) | |
1182 | return -ENOSYS; | |
1183 | ||
1184 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
1185 | if (IS_ERR(shost)) { | |
1186 | printk(KERN_ERR "set_host_param could not find host no %u\n", | |
1187 | ev->u.set_host_param.host_no); | |
1188 | return -ENODEV; | |
1189 | } | |
1190 | ||
1191 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1192 | data, ev->u.set_host_param.len); | |
1193 | scsi_host_put(shost); | |
1194 | return err; | |
1195 | } | |
1196 | ||
0896b752 AA |
1197 | static int |
1198 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) | |
1199 | { | |
1200 | int err = 0; | |
40753caa | 1201 | uint32_t host_no = UINT_MAX; |
0896b752 AA |
1202 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); |
1203 | struct iscsi_transport *transport = NULL; | |
1204 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1205 | struct iscsi_cls_session *session; |
1206 | struct iscsi_cls_conn *conn; | |
0896b752 | 1207 | |
0896b752 AA |
1208 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1209 | if (!priv) | |
1210 | return -EINVAL; | |
1211 | transport = priv->iscsi_transport; | |
1212 | ||
7b7232f3 MC |
1213 | if (!try_module_get(transport->owner)) |
1214 | return -EINVAL; | |
1215 | ||
790f39a2 MC |
1216 | priv->daemon_pid = NETLINK_CREDS(skb)->pid; |
1217 | ||
0896b752 AA |
1218 | switch (nlh->nlmsg_type) { |
1219 | case ISCSI_UEVENT_CREATE_SESSION: | |
40753caa MC |
1220 | err = iscsi_if_create_session(priv, ev, host_no, |
1221 | ev->u.c_session.initial_cmdsn, | |
1222 | ev->u.c_session.cmds_max, | |
1223 | ev->u.c_session.queue_depth); | |
1224 | break; | |
1225 | case ISCSI_UEVENT_CREATE_BOUND_SESSION: | |
1226 | err = iscsi_if_create_session(priv, ev, | |
1227 | ev->u.c_bound_session.host_no, | |
1228 | ev->u.c_bound_session.initial_cmdsn, | |
1229 | ev->u.c_bound_session.cmds_max, | |
1230 | ev->u.c_bound_session.queue_depth); | |
0896b752 AA |
1231 | break; |
1232 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1233 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1234 | if (session) |
7b7232f3 | 1235 | transport->destroy_session(session); |
26974789 MC |
1236 | else |
1237 | err = -EINVAL; | |
1238 | break; | |
1239 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1240 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1241 | if (session) | |
1242 | iscsi_unbind_session(session); | |
1243 | else | |
7b7232f3 | 1244 | err = -EINVAL; |
0896b752 AA |
1245 | break; |
1246 | case ISCSI_UEVENT_CREATE_CONN: | |
1247 | err = iscsi_if_create_conn(transport, ev); | |
1248 | break; | |
1249 | case ISCSI_UEVENT_DESTROY_CONN: | |
1250 | err = iscsi_if_destroy_conn(transport, ev); | |
1251 | break; | |
1252 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1253 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1254 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 MC |
1255 | |
1256 | if (session && conn) | |
1257 | ev->r.retcode = transport->bind_conn(session, conn, | |
264faaaa | 1258 | ev->u.b_conn.transport_eph, |
7b7232f3 MC |
1259 | ev->u.b_conn.is_leading); |
1260 | else | |
1261 | err = -EINVAL; | |
0896b752 AA |
1262 | break; |
1263 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1264 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1265 | break; |
1266 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1267 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1268 | if (conn) |
1269 | ev->r.retcode = transport->start_conn(conn); | |
1270 | else | |
1271 | err = -EINVAL; | |
0896b752 AA |
1272 | break; |
1273 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1274 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1275 | if (conn) |
1276 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1277 | else | |
1278 | err = -EINVAL; | |
0896b752 AA |
1279 | break; |
1280 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1281 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1282 | if (conn) |
1283 | ev->r.retcode = transport->send_pdu(conn, | |
1284 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1285 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1286 | ev->u.send_pdu.data_size); | |
1287 | else | |
1288 | err = -EINVAL; | |
0896b752 AA |
1289 | break; |
1290 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1291 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1292 | break; |
264faaaa OG |
1293 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1294 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1295 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1296 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); | |
1297 | break; | |
01cb225d MC |
1298 | case ISCSI_UEVENT_TGT_DSCVR: |
1299 | err = iscsi_tgt_dscvr(transport, ev); | |
1300 | break; | |
1d9bf13a MC |
1301 | case ISCSI_UEVENT_SET_HOST_PARAM: |
1302 | err = iscsi_set_host_param(transport, ev); | |
1303 | break; | |
0896b752 | 1304 | default: |
1d9bf13a | 1305 | err = -ENOSYS; |
0896b752 AA |
1306 | break; |
1307 | } | |
1308 | ||
7b7232f3 | 1309 | module_put(transport->owner); |
0896b752 AA |
1310 | return err; |
1311 | } | |
1312 | ||
b5c7a12d | 1313 | /* |
cd40b7d3 DL |
1314 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
1315 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 1316 | */ |
0896b752 | 1317 | static void |
cd40b7d3 | 1318 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 1319 | { |
0b950672 | 1320 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
1321 | while (skb->len >= NLMSG_SPACE(0)) { |
1322 | int err; | |
1323 | uint32_t rlen; | |
1324 | struct nlmsghdr *nlh; | |
1325 | struct iscsi_uevent *ev; | |
1326 | ||
1327 | nlh = nlmsg_hdr(skb); | |
1328 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
1329 | skb->len < nlh->nlmsg_len) { | |
1330 | break; | |
ee7f8e40 | 1331 | } |
ee7f8e40 | 1332 | |
cd40b7d3 DL |
1333 | ev = NLMSG_DATA(nlh); |
1334 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1335 | if (rlen > skb->len) | |
1336 | rlen = skb->len; | |
0896b752 | 1337 | |
cd40b7d3 DL |
1338 | err = iscsi_if_recv_msg(skb, nlh); |
1339 | if (err) { | |
1340 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1341 | ev->iferror = err; | |
0896b752 | 1342 | } |
cd40b7d3 DL |
1343 | do { |
1344 | /* | |
1345 | * special case for GET_STATS: | |
1346 | * on success - sending reply and stats from | |
1347 | * inside of if_recv_msg(), | |
1348 | * on error - fall through. | |
1349 | */ | |
1350 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1351 | break; | |
1352 | err = iscsi_if_send_reply( | |
1353 | NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq, | |
1354 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); | |
1355 | } while (err < 0 && err != -ECONNREFUSED); | |
1356 | skb_pull(skb, rlen); | |
0896b752 | 1357 | } |
0b950672 | 1358 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1359 | } |
1da177e4 | 1360 | |
fd7255f5 | 1361 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
ee959b00 | 1362 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
fd7255f5 MC |
1363 | __ATTR(_name,_mode,_show,_store) |
1364 | ||
1da177e4 | 1365 | /* |
0896b752 | 1366 | * iSCSI connection attrs |
1da177e4 | 1367 | */ |
a54a52ca | 1368 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1369 | static ssize_t \ |
ee959b00 TJ |
1370 | show_conn_param_##param(struct device *dev, \ |
1371 | struct device_attribute *attr, char *buf) \ | |
0896b752 | 1372 | { \ |
ee959b00 | 1373 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ |
7b8631b5 | 1374 | struct iscsi_transport *t = conn->transport; \ |
a54a52ca | 1375 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1376 | } |
1377 | ||
a54a52ca MC |
1378 | #define iscsi_conn_attr(field, param) \ |
1379 | iscsi_conn_attr_show(param) \ | |
1380 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1381 | NULL); |
0896b752 | 1382 | |
a54a52ca MC |
1383 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1384 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1385 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1386 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1387 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1388 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1389 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
1390 | iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT); | |
1391 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); | |
1392 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
1393 | iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
f6d5180c MC |
1394 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
1395 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 LT |
1396 | |
1397 | /* | |
0896b752 | 1398 | * iSCSI session attrs |
1da177e4 | 1399 | */ |
b2c64167 | 1400 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 1401 | static ssize_t \ |
ee959b00 TJ |
1402 | show_session_param_##param(struct device *dev, \ |
1403 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1404 | { \ |
ee959b00 TJ |
1405 | struct iscsi_cls_session *session = \ |
1406 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 | 1407 | struct iscsi_transport *t = session->transport; \ |
b2c64167 MC |
1408 | \ |
1409 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
1410 | return -EACCES; \ | |
a54a52ca | 1411 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
1412 | } |
1413 | ||
b2c64167 MC |
1414 | #define iscsi_session_attr(field, param, perm) \ |
1415 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 1416 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 MC |
1417 | NULL); |
1418 | ||
b2c64167 MC |
1419 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
1420 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
1421 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
1422 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
1423 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
1424 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
1425 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
1426 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
1427 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
1428 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
1429 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
1430 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
1431 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
1432 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
1433 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
1434 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
1435 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
1da177e4 | 1436 | |
6eabafbe | 1437 | static ssize_t |
ee959b00 TJ |
1438 | show_priv_session_state(struct device *dev, struct device_attribute *attr, |
1439 | char *buf) | |
6eabafbe | 1440 | { |
ee959b00 | 1441 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); |
6eabafbe MC |
1442 | return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); |
1443 | } | |
1444 | static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, | |
1445 | NULL); | |
1446 | ||
fd7255f5 MC |
1447 | #define iscsi_priv_session_attr_show(field, format) \ |
1448 | static ssize_t \ | |
ee959b00 TJ |
1449 | show_priv_session_##field(struct device *dev, \ |
1450 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1451 | { \ |
ee959b00 TJ |
1452 | struct iscsi_cls_session *session = \ |
1453 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 MC |
1454 | return sprintf(buf, format"\n", session->field); \ |
1455 | } | |
1456 | ||
1457 | #define iscsi_priv_session_attr(field, format) \ | |
1458 | iscsi_priv_session_attr_show(field, format) \ | |
1459 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \ | |
1460 | NULL) | |
30a6c652 | 1461 | iscsi_priv_session_attr(recovery_tmo, "%d"); |
fd7255f5 | 1462 | |
1819dc81 MC |
1463 | /* |
1464 | * iSCSI host attrs | |
1465 | */ | |
1466 | #define iscsi_host_attr_show(param) \ | |
1467 | static ssize_t \ | |
ee959b00 TJ |
1468 | show_host_param_##param(struct device *dev, \ |
1469 | struct device_attribute *attr, char *buf) \ | |
1819dc81 | 1470 | { \ |
ee959b00 | 1471 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1819dc81 MC |
1472 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ |
1473 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
1474 | } | |
1475 | ||
1476 | #define iscsi_host_attr(field, param) \ | |
1477 | iscsi_host_attr_show(param) \ | |
1478 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
1479 | NULL); | |
1480 | ||
d8196ed2 | 1481 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 1482 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 1483 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 1484 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 1485 | |
fd7255f5 MC |
1486 | #define SETUP_PRIV_SESSION_RD_ATTR(field) \ |
1487 | do { \ | |
ee959b00 | 1488 | priv->session_attrs[count] = &dev_attr_priv_sess_##field; \ |
fd7255f5 MC |
1489 | count++; \ |
1490 | } while (0) | |
1491 | ||
a54a52ca | 1492 | |
fd7255f5 MC |
1493 | #define SETUP_SESSION_RD_ATTR(field, param_flag) \ |
1494 | do { \ | |
1495 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1496 | priv->session_attrs[count] = &dev_attr_sess_##field; \ |
1da177e4 | 1497 | count++; \ |
fd7255f5 MC |
1498 | } \ |
1499 | } while (0) | |
1500 | ||
fd7255f5 MC |
1501 | #define SETUP_CONN_RD_ATTR(field, param_flag) \ |
1502 | do { \ | |
1503 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1504 | priv->conn_attrs[count] = &dev_attr_conn_##field; \ |
fd7255f5 MC |
1505 | count++; \ |
1506 | } \ | |
1507 | } while (0) | |
1da177e4 | 1508 | |
1819dc81 MC |
1509 | #define SETUP_HOST_RD_ATTR(field, param_flag) \ |
1510 | do { \ | |
1511 | if (tt->host_param_mask & param_flag) { \ | |
ee959b00 | 1512 | priv->host_attrs[count] = &dev_attr_host_##field; \ |
1819dc81 MC |
1513 | count++; \ |
1514 | } \ | |
1515 | } while (0) | |
1516 | ||
0896b752 AA |
1517 | static int iscsi_session_match(struct attribute_container *cont, |
1518 | struct device *dev) | |
1da177e4 | 1519 | { |
7b8631b5 | 1520 | struct iscsi_cls_session *session; |
1da177e4 | 1521 | struct Scsi_Host *shost; |
0896b752 AA |
1522 | struct iscsi_internal *priv; |
1523 | ||
1524 | if (!iscsi_is_session_dev(dev)) | |
1525 | return 0; | |
1da177e4 | 1526 | |
7b8631b5 MC |
1527 | session = iscsi_dev_to_session(dev); |
1528 | shost = iscsi_session_to_shost(session); | |
0896b752 | 1529 | if (!shost->transportt) |
1da177e4 LT |
1530 | return 0; |
1531 | ||
0896b752 AA |
1532 | priv = to_iscsi_internal(shost->transportt); |
1533 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
1534 | return 0; |
1535 | ||
0896b752 | 1536 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
1537 | } |
1538 | ||
0896b752 AA |
1539 | static int iscsi_conn_match(struct attribute_container *cont, |
1540 | struct device *dev) | |
1541 | { | |
7b8631b5 MC |
1542 | struct iscsi_cls_session *session; |
1543 | struct iscsi_cls_conn *conn; | |
1da177e4 | 1544 | struct Scsi_Host *shost; |
0896b752 | 1545 | struct iscsi_internal *priv; |
1da177e4 | 1546 | |
0896b752 | 1547 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
1548 | return 0; |
1549 | ||
7b8631b5 MC |
1550 | conn = iscsi_dev_to_conn(dev); |
1551 | session = iscsi_dev_to_session(conn->dev.parent); | |
1552 | shost = iscsi_session_to_shost(session); | |
1553 | ||
0896b752 | 1554 | if (!shost->transportt) |
1da177e4 LT |
1555 | return 0; |
1556 | ||
0896b752 AA |
1557 | priv = to_iscsi_internal(shost->transportt); |
1558 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
1559 | return 0; | |
1da177e4 | 1560 | |
0896b752 AA |
1561 | return &priv->conn_cont.ac == cont; |
1562 | } | |
1563 | ||
30a6c652 MC |
1564 | static int iscsi_host_match(struct attribute_container *cont, |
1565 | struct device *dev) | |
1566 | { | |
1567 | struct Scsi_Host *shost; | |
1568 | struct iscsi_internal *priv; | |
1569 | ||
1570 | if (!scsi_is_host_device(dev)) | |
1571 | return 0; | |
1572 | ||
1573 | shost = dev_to_shost(dev); | |
1574 | if (!shost->transportt || | |
1575 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
1576 | return 0; | |
1577 | ||
1578 | priv = to_iscsi_internal(shost->transportt); | |
1579 | return &priv->t.host_attrs.ac == cont; | |
1580 | } | |
1581 | ||
7b8631b5 MC |
1582 | struct scsi_transport_template * |
1583 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
1584 | { |
1585 | struct iscsi_internal *priv; | |
1586 | unsigned long flags; | |
1587 | int count = 0, err; | |
1588 | ||
1589 | BUG_ON(!tt); | |
1590 | ||
1591 | priv = iscsi_if_transport_lookup(tt); | |
1592 | if (priv) | |
7b8631b5 | 1593 | return NULL; |
0896b752 | 1594 | |
24669f75 | 1595 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 1596 | if (!priv) |
7b8631b5 | 1597 | return NULL; |
0896b752 | 1598 | INIT_LIST_HEAD(&priv->list); |
53cb8a1f | 1599 | priv->daemon_pid = -1; |
0896b752 | 1600 | priv->iscsi_transport = tt; |
30a6c652 | 1601 | priv->t.user_scan = iscsi_user_scan; |
0896b752 | 1602 | |
ee959b00 TJ |
1603 | priv->dev.class = &iscsi_transport_class; |
1604 | snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name); | |
1605 | err = device_register(&priv->dev); | |
0896b752 AA |
1606 | if (err) |
1607 | goto free_priv; | |
1608 | ||
ee959b00 | 1609 | err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); |
0896b752 | 1610 | if (err) |
ee959b00 | 1611 | goto unregister_dev; |
0896b752 | 1612 | |
30a6c652 MC |
1613 | /* host parameters */ |
1614 | priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; | |
1615 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; | |
1616 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
32c6e1b9 | 1617 | priv->t.host_size = sizeof(struct iscsi_cls_host); |
30a6c652 MC |
1618 | transport_container_register(&priv->t.host_attrs); |
1619 | ||
d8196ed2 | 1620 | SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); |
22236961 | 1621 | SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS); |
1819dc81 | 1622 | SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS); |
8ad5781a | 1623 | SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME); |
1819dc81 MC |
1624 | BUG_ON(count > ISCSI_HOST_ATTRS); |
1625 | priv->host_attrs[count] = NULL; | |
1626 | count = 0; | |
1627 | ||
0896b752 AA |
1628 | /* connection parameters */ |
1629 | priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; | |
1630 | priv->conn_cont.ac.class = &iscsi_connection_class.class; | |
1631 | priv->conn_cont.ac.match = iscsi_conn_match; | |
1632 | transport_container_register(&priv->conn_cont); | |
1da177e4 | 1633 | |
fd7255f5 MC |
1634 | SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH); |
1635 | SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH); | |
1636 | SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN); | |
1637 | SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN); | |
1638 | SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN); | |
1639 | SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN); | |
1640 | SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS); | |
1641 | SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT); | |
8d2860b3 | 1642 | SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN); |
a54a52ca MC |
1643 | SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS); |
1644 | SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT); | |
f6d5180c MC |
1645 | SETUP_CONN_RD_ATTR(ping_tmo, ISCSI_PING_TMO); |
1646 | SETUP_CONN_RD_ATTR(recv_tmo, ISCSI_RECV_TMO); | |
0896b752 AA |
1647 | |
1648 | BUG_ON(count > ISCSI_CONN_ATTRS); | |
1649 | priv->conn_attrs[count] = NULL; | |
1da177e4 | 1650 | count = 0; |
1da177e4 | 1651 | |
0896b752 AA |
1652 | /* session parameters */ |
1653 | priv->session_cont.ac.attrs = &priv->session_attrs[0]; | |
1654 | priv->session_cont.ac.class = &iscsi_session_class.class; | |
1655 | priv->session_cont.ac.match = iscsi_session_match; | |
1656 | transport_container_register(&priv->session_cont); | |
1657 | ||
fd7255f5 MC |
1658 | SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN); |
1659 | SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T); | |
1660 | SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN); | |
1661 | SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST); | |
1662 | SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST); | |
1663 | SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN); | |
1664 | SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN); | |
1665 | SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL); | |
a54a52ca MC |
1666 | SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME); |
1667 | SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT); | |
b2c64167 MC |
1668 | SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME); |
1669 | SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN); | |
1670 | SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD); | |
1671 | SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN); | |
843c0a8a | 1672 | SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); |
4cd49ea1 MC |
1673 | SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO); |
1674 | SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO); | |
30a6c652 | 1675 | SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); |
6eabafbe | 1676 | SETUP_PRIV_SESSION_RD_ATTR(state); |
fd7255f5 | 1677 | |
0896b752 AA |
1678 | BUG_ON(count > ISCSI_SESSION_ATTRS); |
1679 | priv->session_attrs[count] = NULL; | |
1680 | ||
1681 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1682 | list_add(&priv->list, &iscsi_transports); | |
1683 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1684 | ||
1685 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 1686 | return &priv->t; |
1da177e4 | 1687 | |
ee959b00 TJ |
1688 | unregister_dev: |
1689 | device_unregister(&priv->dev); | |
0896b752 AA |
1690 | free_priv: |
1691 | kfree(priv); | |
7b8631b5 | 1692 | return NULL; |
1da177e4 | 1693 | } |
0896b752 AA |
1694 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
1695 | ||
1696 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
1697 | { | |
1698 | struct iscsi_internal *priv; | |
1699 | unsigned long flags; | |
1700 | ||
1701 | BUG_ON(!tt); | |
1702 | ||
0b950672 | 1703 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
1704 | |
1705 | priv = iscsi_if_transport_lookup(tt); | |
1706 | BUG_ON (!priv); | |
1707 | ||
0896b752 AA |
1708 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
1709 | list_del(&priv->list); | |
1710 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1711 | ||
1712 | transport_container_unregister(&priv->conn_cont); | |
1713 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 1714 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 | 1715 | |
ee959b00 TJ |
1716 | sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); |
1717 | device_unregister(&priv->dev); | |
0b950672 | 1718 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 1719 | |
0896b752 AA |
1720 | return 0; |
1721 | } | |
1722 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 1723 | |
1da177e4 LT |
1724 | static __init int iscsi_transport_init(void) |
1725 | { | |
0896b752 | 1726 | int err; |
1da177e4 | 1727 | |
09492605 | 1728 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
1729 | ISCSI_TRANSPORT_VERSION); |
1730 | ||
41be1444 MC |
1731 | atomic_set(&iscsi_session_nr, 0); |
1732 | ||
0896b752 | 1733 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
1734 | if (err) |
1735 | return err; | |
0896b752 | 1736 | |
30a6c652 | 1737 | err = transport_class_register(&iscsi_host_class); |
0896b752 AA |
1738 | if (err) |
1739 | goto unregister_transport_class; | |
1740 | ||
30a6c652 MC |
1741 | err = transport_class_register(&iscsi_connection_class); |
1742 | if (err) | |
1743 | goto unregister_host_class; | |
1744 | ||
0896b752 AA |
1745 | err = transport_class_register(&iscsi_session_class); |
1746 | if (err) | |
1747 | goto unregister_conn_class; | |
1748 | ||
b4b51029 | 1749 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL, |
7b8631b5 | 1750 | THIS_MODULE); |
0896b752 AA |
1751 | if (!nls) { |
1752 | err = -ENOBUFS; | |
43a145a3 | 1753 | goto unregister_session_class; |
0896b752 AA |
1754 | } |
1755 | ||
d8bf541e MC |
1756 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
1757 | if (!iscsi_eh_timer_workq) | |
1758 | goto release_nls; | |
1759 | ||
43a145a3 | 1760 | return 0; |
0896b752 | 1761 | |
d8bf541e | 1762 | release_nls: |
b7c6ba6e | 1763 | netlink_kernel_release(nls); |
0896b752 AA |
1764 | unregister_session_class: |
1765 | transport_class_unregister(&iscsi_session_class); | |
1766 | unregister_conn_class: | |
1767 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
1768 | unregister_host_class: |
1769 | transport_class_unregister(&iscsi_host_class); | |
0896b752 AA |
1770 | unregister_transport_class: |
1771 | class_unregister(&iscsi_transport_class); | |
1772 | return err; | |
1da177e4 LT |
1773 | } |
1774 | ||
1775 | static void __exit iscsi_transport_exit(void) | |
1776 | { | |
d8bf541e | 1777 | destroy_workqueue(iscsi_eh_timer_workq); |
b7c6ba6e | 1778 | netlink_kernel_release(nls); |
0896b752 AA |
1779 | transport_class_unregister(&iscsi_connection_class); |
1780 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 1781 | transport_class_unregister(&iscsi_host_class); |
0896b752 | 1782 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
1783 | } |
1784 | ||
1785 | module_init(iscsi_transport_init); | |
1786 | module_exit(iscsi_transport_exit); | |
1787 | ||
0896b752 AA |
1788 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
1789 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
1790 | "Alex Aizman <itn780@yahoo.com>"); | |
1791 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 1792 | MODULE_LICENSE("GPL"); |
f4246b33 | 1793 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |