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 | |
4cd49ea1 | 33 | #define ISCSI_SESSION_ATTRS 18 |
8d2860b3 | 34 | #define ISCSI_CONN_ATTRS 11 |
d8196ed2 | 35 | #define ISCSI_HOST_ATTRS 4 |
10396238 | 36 | #define ISCSI_TRANSPORT_VERSION "2.0-867" |
1da177e4 LT |
37 | |
38 | struct iscsi_internal { | |
790f39a2 | 39 | int daemon_pid; |
1da177e4 | 40 | struct scsi_transport_template t; |
0896b752 AA |
41 | struct iscsi_transport *iscsi_transport; |
42 | struct list_head list; | |
0896b752 | 43 | struct class_device cdev; |
30a6c652 MC |
44 | |
45 | struct class_device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1]; | |
0896b752 AA |
46 | struct transport_container conn_cont; |
47 | struct class_device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1]; | |
48 | struct transport_container session_cont; | |
1da177e4 | 49 | struct class_device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1]; |
1da177e4 LT |
50 | }; |
51 | ||
41be1444 | 52 | static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ |
d8bf541e | 53 | static struct workqueue_struct *iscsi_eh_timer_workq; |
b5c7a12d | 54 | |
0896b752 AA |
55 | /* |
56 | * list of registered transports and lock that must | |
57 | * be held while accessing list. The iscsi_transport_lock must | |
0b950672 | 58 | * be acquired after the rx_queue_mutex. |
0896b752 AA |
59 | */ |
60 | static LIST_HEAD(iscsi_transports); | |
61 | static DEFINE_SPINLOCK(iscsi_transport_lock); | |
62 | ||
63 | #define to_iscsi_internal(tmpl) \ | |
64 | container_of(tmpl, struct iscsi_internal, t) | |
65 | ||
66 | #define cdev_to_iscsi_internal(_cdev) \ | |
67 | container_of(_cdev, struct iscsi_internal, cdev) | |
68 | ||
69 | static void iscsi_transport_release(struct class_device *cdev) | |
70 | { | |
71 | struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); | |
72 | kfree(priv); | |
73 | } | |
1da177e4 | 74 | |
0896b752 AA |
75 | /* |
76 | * iscsi_transport_class represents the iscsi_transports that are | |
77 | * registered. | |
78 | */ | |
79 | static struct class iscsi_transport_class = { | |
80 | .name = "iscsi_transport", | |
81 | .release = iscsi_transport_release, | |
82 | }; | |
83 | ||
84 | static ssize_t | |
85 | show_transport_handle(struct class_device *cdev, char *buf) | |
86 | { | |
87 | struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); | |
762e2bfa | 88 | return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); |
0896b752 AA |
89 | } |
90 | static CLASS_DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); | |
91 | ||
92 | #define show_transport_attr(name, format) \ | |
93 | static ssize_t \ | |
94 | show_transport_##name(struct class_device *cdev, char *buf) \ | |
95 | { \ | |
96 | struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); \ | |
97 | return sprintf(buf, format"\n", priv->iscsi_transport->name); \ | |
98 | } \ | |
99 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); | |
100 | ||
101 | show_transport_attr(caps, "0x%x"); | |
102 | show_transport_attr(max_lun, "%d"); | |
103 | show_transport_attr(max_conn, "%d"); | |
104 | show_transport_attr(max_cmd_len, "%d"); | |
105 | ||
106 | static struct attribute *iscsi_transport_attrs[] = { | |
107 | &class_device_attr_handle.attr, | |
108 | &class_device_attr_caps.attr, | |
109 | &class_device_attr_max_lun.attr, | |
110 | &class_device_attr_max_conn.attr, | |
111 | &class_device_attr_max_cmd_len.attr, | |
112 | NULL, | |
113 | }; | |
114 | ||
115 | static struct attribute_group iscsi_transport_group = { | |
116 | .attrs = iscsi_transport_attrs, | |
117 | }; | |
118 | ||
26974789 MC |
119 | |
120 | ||
30a6c652 MC |
121 | static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
122 | struct class_device *cdev) | |
123 | { | |
124 | struct Scsi_Host *shost = dev_to_shost(dev); | |
125 | struct iscsi_host *ihost = shost->shost_data; | |
126 | ||
127 | memset(ihost, 0, sizeof(*ihost)); | |
128 | INIT_LIST_HEAD(&ihost->sessions); | |
129 | mutex_init(&ihost->mutex); | |
26974789 MC |
130 | |
131 | snprintf(ihost->unbind_workq_name, KOBJ_NAME_LEN, "iscsi_unbind_%d", | |
132 | shost->host_no); | |
133 | ihost->unbind_workq = create_singlethread_workqueue( | |
134 | ihost->unbind_workq_name); | |
135 | if (!ihost->unbind_workq) | |
136 | return -ENOMEM; | |
137 | return 0; | |
138 | } | |
139 | ||
140 | static int iscsi_remove_host(struct transport_container *tc, struct device *dev, | |
141 | struct class_device *cdev) | |
142 | { | |
143 | struct Scsi_Host *shost = dev_to_shost(dev); | |
144 | struct iscsi_host *ihost = shost->shost_data; | |
145 | ||
146 | destroy_workqueue(ihost->unbind_workq); | |
30a6c652 MC |
147 | return 0; |
148 | } | |
149 | ||
150 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
151 | "iscsi_host", | |
152 | iscsi_setup_host, | |
26974789 | 153 | iscsi_remove_host, |
30a6c652 MC |
154 | NULL); |
155 | ||
0896b752 AA |
156 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
157 | "iscsi_session", | |
1da177e4 LT |
158 | NULL, |
159 | NULL, | |
160 | NULL); | |
161 | ||
0896b752 AA |
162 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
163 | "iscsi_connection", | |
1da177e4 LT |
164 | NULL, |
165 | NULL, | |
166 | NULL); | |
0896b752 AA |
167 | |
168 | static struct sock *nls; | |
0b950672 | 169 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 170 | |
7b7232f3 MC |
171 | static LIST_HEAD(sesslist); |
172 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
173 | static LIST_HEAD(connlist); |
174 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 175 | |
b5c7a12d MC |
176 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
177 | { | |
178 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
179 | return sess->sid; | |
180 | } | |
181 | ||
182 | /* | |
183 | * Returns the matching session to a given sid | |
184 | */ | |
185 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
186 | { |
187 | unsigned long flags; | |
188 | struct iscsi_cls_session *sess; | |
189 | ||
190 | spin_lock_irqsave(&sesslock, flags); | |
191 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 192 | if (sess->sid == sid) { |
7b7232f3 MC |
193 | spin_unlock_irqrestore(&sesslock, flags); |
194 | return sess; | |
195 | } | |
196 | } | |
197 | spin_unlock_irqrestore(&sesslock, flags); | |
198 | return NULL; | |
199 | } | |
200 | ||
b5c7a12d MC |
201 | /* |
202 | * Returns the matching connection to a given sid / cid tuple | |
203 | */ | |
204 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
205 | { |
206 | unsigned long flags; | |
207 | struct iscsi_cls_conn *conn; | |
208 | ||
209 | spin_lock_irqsave(&connlock, flags); | |
210 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 211 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
212 | spin_unlock_irqrestore(&connlock, flags); |
213 | return conn; | |
214 | } | |
215 | } | |
216 | spin_unlock_irqrestore(&connlock, flags); | |
217 | return NULL; | |
218 | } | |
219 | ||
7b8631b5 MC |
220 | /* |
221 | * The following functions can be used by LLDs that allocate | |
222 | * their own scsi_hosts or by software iscsi LLDs | |
223 | */ | |
224 | static void iscsi_session_release(struct device *dev) | |
225 | { | |
226 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 227 | struct Scsi_Host *shost; |
0896b752 | 228 | |
7b8631b5 MC |
229 | shost = iscsi_session_to_shost(session); |
230 | scsi_host_put(shost); | |
231 | kfree(session); | |
7b8631b5 | 232 | } |
0896b752 | 233 | |
7b8631b5 MC |
234 | static int iscsi_is_session_dev(const struct device *dev) |
235 | { | |
236 | return dev->release == iscsi_session_release; | |
237 | } | |
0896b752 | 238 | |
30a6c652 MC |
239 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
240 | uint id, uint lun) | |
241 | { | |
242 | struct iscsi_host *ihost = shost->shost_data; | |
243 | struct iscsi_cls_session *session; | |
244 | ||
245 | mutex_lock(&ihost->mutex); | |
246 | list_for_each_entry(session, &ihost->sessions, host_list) { | |
e6f3b63f | 247 | if ((channel == SCAN_WILD_CARD || channel == 0) && |
30a6c652 | 248 | (id == SCAN_WILD_CARD || id == session->target_id)) |
e6f3b63f | 249 | scsi_scan_target(&session->dev, 0, |
30a6c652 MC |
250 | session->target_id, lun, 1); |
251 | } | |
252 | mutex_unlock(&ihost->mutex); | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
c4028958 | 257 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 258 | { |
c4028958 DH |
259 | struct iscsi_cls_session *session = |
260 | container_of(work, struct iscsi_cls_session, | |
261 | recovery_work.work); | |
30a6c652 | 262 | |
be2df72e OG |
263 | dev_printk(KERN_INFO, &session->dev, "iscsi: session recovery timed " |
264 | "out after %d secs\n", session->recovery_tmo); | |
30a6c652 MC |
265 | |
266 | if (session->transport->session_recovery_timedout) | |
267 | session->transport->session_recovery_timedout(session); | |
268 | ||
269 | scsi_target_unblock(&session->dev); | |
270 | } | |
271 | ||
272 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
273 | { | |
274 | if (!cancel_delayed_work(&session->recovery_work)) | |
d8bf541e | 275 | flush_workqueue(iscsi_eh_timer_workq); |
30a6c652 MC |
276 | scsi_target_unblock(&session->dev); |
277 | } | |
278 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); | |
279 | ||
280 | void iscsi_block_session(struct iscsi_cls_session *session) | |
281 | { | |
282 | scsi_target_block(&session->dev); | |
d8bf541e MC |
283 | queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work, |
284 | session->recovery_tmo * HZ); | |
30a6c652 MC |
285 | } |
286 | EXPORT_SYMBOL_GPL(iscsi_block_session); | |
287 | ||
26974789 MC |
288 | static void __iscsi_unbind_session(struct work_struct *work) |
289 | { | |
290 | struct iscsi_cls_session *session = | |
291 | container_of(work, struct iscsi_cls_session, | |
292 | unbind_work); | |
293 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
294 | struct iscsi_host *ihost = shost->shost_data; | |
295 | ||
296 | /* Prevent new scans and make sure scanning is not in progress */ | |
297 | mutex_lock(&ihost->mutex); | |
298 | if (list_empty(&session->host_list)) { | |
299 | mutex_unlock(&ihost->mutex); | |
300 | return; | |
301 | } | |
302 | list_del_init(&session->host_list); | |
303 | mutex_unlock(&ihost->mutex); | |
304 | ||
305 | scsi_remove_target(&session->dev); | |
306 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
307 | } | |
308 | ||
309 | static int iscsi_unbind_session(struct iscsi_cls_session *session) | |
310 | { | |
311 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
312 | struct iscsi_host *ihost = shost->shost_data; | |
313 | ||
314 | return queue_work(ihost->unbind_workq, &session->unbind_work); | |
315 | } | |
316 | ||
7b8631b5 | 317 | struct iscsi_cls_session * |
8434aa8b MC |
318 | iscsi_alloc_session(struct Scsi_Host *shost, |
319 | struct iscsi_transport *transport) | |
7b8631b5 MC |
320 | { |
321 | struct iscsi_cls_session *session; | |
7b8631b5 | 322 | |
b5c7a12d MC |
323 | session = kzalloc(sizeof(*session) + transport->sessiondata_size, |
324 | GFP_KERNEL); | |
7b8631b5 | 325 | if (!session) |
f53a88da MC |
326 | return NULL; |
327 | ||
7b8631b5 | 328 | session->transport = transport; |
30a6c652 | 329 | session->recovery_tmo = 120; |
c4028958 | 330 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 MC |
331 | INIT_LIST_HEAD(&session->host_list); |
332 | INIT_LIST_HEAD(&session->sess_list); | |
26974789 | 333 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
7b8631b5 | 334 | |
6a8a0d36 MC |
335 | /* this is released in the dev's release function */ |
336 | scsi_host_get(shost); | |
8434aa8b MC |
337 | session->dev.parent = &shost->shost_gendev; |
338 | session->dev.release = iscsi_session_release; | |
339 | device_initialize(&session->dev); | |
b5c7a12d MC |
340 | if (transport->sessiondata_size) |
341 | session->dd_data = &session[1]; | |
8434aa8b MC |
342 | return session; |
343 | } | |
344 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
345 | ||
6a8a0d36 | 346 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
347 | { |
348 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
349 | struct iscsi_host *ihost; | |
26974789 | 350 | unsigned long flags; |
8434aa8b | 351 | int err; |
b5c7a12d | 352 | |
30a6c652 | 353 | ihost = shost->shost_data; |
41be1444 | 354 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
6a8a0d36 | 355 | session->target_id = target_id; |
30a6c652 | 356 | |
b5c7a12d MC |
357 | snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", |
358 | session->sid); | |
8434aa8b | 359 | err = device_add(&session->dev); |
7b8631b5 MC |
360 | if (err) { |
361 | dev_printk(KERN_ERR, &session->dev, "iscsi: could not " | |
362 | "register session's dev\n"); | |
8434aa8b | 363 | goto release_host; |
7b8631b5 MC |
364 | } |
365 | transport_register_device(&session->dev); | |
366 | ||
26974789 MC |
367 | spin_lock_irqsave(&sesslock, flags); |
368 | list_add(&session->sess_list, &sesslist); | |
369 | spin_unlock_irqrestore(&sesslock, flags); | |
370 | ||
30a6c652 MC |
371 | mutex_lock(&ihost->mutex); |
372 | list_add(&session->host_list, &ihost->sessions); | |
373 | mutex_unlock(&ihost->mutex); | |
26974789 MC |
374 | |
375 | iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); | |
8434aa8b | 376 | return 0; |
30a6c652 | 377 | |
8434aa8b MC |
378 | release_host: |
379 | scsi_host_put(shost); | |
380 | return err; | |
7b8631b5 | 381 | } |
8434aa8b | 382 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
383 | |
384 | /** | |
8434aa8b MC |
385 | * iscsi_create_session - create iscsi class session |
386 | * @shost: scsi host | |
387 | * @transport: iscsi transport | |
eb44820c | 388 | * @target_id: which target |
7b8631b5 | 389 | * |
8434aa8b | 390 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 391 | */ |
8434aa8b MC |
392 | struct iscsi_cls_session * |
393 | iscsi_create_session(struct Scsi_Host *shost, | |
6a8a0d36 MC |
394 | struct iscsi_transport *transport, |
395 | unsigned int target_id) | |
8434aa8b MC |
396 | { |
397 | struct iscsi_cls_session *session; | |
398 | ||
399 | session = iscsi_alloc_session(shost, transport); | |
400 | if (!session) | |
401 | return NULL; | |
402 | ||
6a8a0d36 | 403 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
404 | iscsi_free_session(session); |
405 | return NULL; | |
406 | } | |
407 | return session; | |
408 | } | |
409 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
410 | ||
26974789 MC |
411 | static void iscsi_conn_release(struct device *dev) |
412 | { | |
413 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
414 | struct device *parent = conn->dev.parent; | |
415 | ||
416 | kfree(conn); | |
417 | put_device(parent); | |
418 | } | |
419 | ||
420 | static int iscsi_is_conn_dev(const struct device *dev) | |
421 | { | |
422 | return dev->release == iscsi_conn_release; | |
423 | } | |
424 | ||
425 | static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) | |
426 | { | |
427 | if (!iscsi_is_conn_dev(dev)) | |
428 | return 0; | |
429 | return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); | |
430 | } | |
431 | ||
8434aa8b | 432 | void iscsi_remove_session(struct iscsi_cls_session *session) |
7b8631b5 | 433 | { |
30a6c652 MC |
434 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
435 | struct iscsi_host *ihost = shost->shost_data; | |
26974789 MC |
436 | unsigned long flags; |
437 | int err; | |
438 | ||
439 | spin_lock_irqsave(&sesslock, flags); | |
440 | list_del(&session->sess_list); | |
441 | spin_unlock_irqrestore(&sesslock, flags); | |
30a6c652 | 442 | |
26974789 MC |
443 | /* |
444 | * If we are blocked let commands flow again. The lld or iscsi | |
445 | * layer should set up the queuecommand to fail commands. | |
446 | */ | |
447 | iscsi_unblock_session(session); | |
448 | iscsi_unbind_session(session); | |
449 | /* | |
450 | * If the session dropped while removing devices then we need to make | |
451 | * sure it is not blocked | |
452 | */ | |
30a6c652 | 453 | if (!cancel_delayed_work(&session->recovery_work)) |
d8bf541e | 454 | flush_workqueue(iscsi_eh_timer_workq); |
26974789 | 455 | flush_workqueue(ihost->unbind_workq); |
30a6c652 | 456 | |
26974789 MC |
457 | /* hw iscsi may not have removed all connections from session */ |
458 | err = device_for_each_child(&session->dev, NULL, | |
459 | iscsi_iter_destroy_conn_fn); | |
460 | if (err) | |
461 | dev_printk(KERN_ERR, &session->dev, "iscsi: Could not delete " | |
462 | "all connections for session. Error %d.\n", err); | |
8434aa8b | 463 | |
7b8631b5 | 464 | transport_unregister_device(&session->dev); |
8434aa8b MC |
465 | device_del(&session->dev); |
466 | } | |
467 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
468 | ||
469 | void iscsi_free_session(struct iscsi_cls_session *session) | |
470 | { | |
26974789 | 471 | iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
8434aa8b | 472 | put_device(&session->dev); |
7b8631b5 | 473 | } |
8434aa8b MC |
474 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
475 | ||
476 | /** | |
477 | * iscsi_destroy_session - destroy iscsi session | |
478 | * @session: iscsi_session | |
479 | * | |
480 | * Can be called by a LLD or iscsi_transport. There must not be | |
481 | * any running connections. | |
eb44820c | 482 | */ |
8434aa8b MC |
483 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
484 | { | |
485 | iscsi_remove_session(session); | |
486 | iscsi_free_session(session); | |
487 | return 0; | |
488 | } | |
7b8631b5 MC |
489 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
490 | ||
7b8631b5 MC |
491 | /** |
492 | * iscsi_create_conn - create iscsi class connection | |
493 | * @session: iscsi cls session | |
494 | * @cid: connection id | |
495 | * | |
496 | * This can be called from a LLD or iscsi_transport. The connection | |
497 | * is child of the session so cid must be unique for all connections | |
498 | * on the session. | |
b5c7a12d MC |
499 | * |
500 | * Since we do not support MCS, cid will normally be zero. In some cases | |
501 | * for software iscsi we could be trying to preallocate a connection struct | |
502 | * in which case there could be two connection structs and cid would be | |
503 | * non-zero. | |
eb44820c | 504 | */ |
7b8631b5 MC |
505 | struct iscsi_cls_conn * |
506 | iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid) | |
507 | { | |
508 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 | 509 | struct iscsi_cls_conn *conn; |
26974789 | 510 | unsigned long flags; |
7b8631b5 MC |
511 | int err; |
512 | ||
513 | conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL); | |
514 | if (!conn) | |
515 | return NULL; | |
516 | ||
517 | if (transport->conndata_size) | |
518 | conn->dd_data = &conn[1]; | |
519 | ||
520 | INIT_LIST_HEAD(&conn->conn_list); | |
521 | conn->transport = transport; | |
b5c7a12d | 522 | conn->cid = cid; |
7b8631b5 MC |
523 | |
524 | /* this is released in the dev's release function */ | |
525 | if (!get_device(&session->dev)) | |
43a145a3 | 526 | goto free_conn; |
b5c7a12d | 527 | |
7b8631b5 | 528 | snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u", |
b5c7a12d | 529 | session->sid, cid); |
7b8631b5 MC |
530 | conn->dev.parent = &session->dev; |
531 | conn->dev.release = iscsi_conn_release; | |
532 | err = device_register(&conn->dev); | |
533 | if (err) { | |
534 | dev_printk(KERN_ERR, &conn->dev, "iscsi: could not register " | |
535 | "connection's dev\n"); | |
536 | goto release_parent_ref; | |
537 | } | |
538 | transport_register_device(&conn->dev); | |
26974789 MC |
539 | |
540 | spin_lock_irqsave(&connlock, flags); | |
541 | list_add(&conn->conn_list, &connlist); | |
542 | conn->active = 1; | |
543 | spin_unlock_irqrestore(&connlock, flags); | |
7b8631b5 MC |
544 | return conn; |
545 | ||
546 | release_parent_ref: | |
547 | put_device(&session->dev); | |
548 | free_conn: | |
549 | kfree(conn); | |
550 | return NULL; | |
551 | } | |
552 | ||
553 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
554 | ||
555 | /** | |
556 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 557 | * @conn: iscsi cls session |
7b8631b5 | 558 | * |
26974789 | 559 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 560 | */ |
7b8631b5 MC |
561 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
562 | { | |
26974789 MC |
563 | unsigned long flags; |
564 | ||
565 | spin_lock_irqsave(&connlock, flags); | |
566 | conn->active = 0; | |
567 | list_del(&conn->conn_list); | |
568 | spin_unlock_irqrestore(&connlock, flags); | |
569 | ||
7b8631b5 MC |
570 | transport_unregister_device(&conn->dev); |
571 | device_unregister(&conn->dev); | |
572 | return 0; | |
573 | } | |
7b8631b5 MC |
574 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
575 | ||
7b8631b5 MC |
576 | /* |
577 | * iscsi interface functions | |
578 | */ | |
0896b752 AA |
579 | static struct iscsi_internal * |
580 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
581 | { | |
582 | struct iscsi_internal *priv; | |
583 | unsigned long flags; | |
584 | ||
585 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
586 | list_for_each_entry(priv, &iscsi_transports, list) { | |
587 | if (tt == priv->iscsi_transport) { | |
588 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
589 | return priv; | |
590 | } | |
591 | } | |
592 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
593 | return NULL; | |
594 | } | |
1da177e4 | 595 | |
53cb8a1f | 596 | static int |
43a145a3 | 597 | iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp) |
53cb8a1f | 598 | { |
53cb8a1f MC |
599 | int rc; |
600 | ||
9aaa2b46 | 601 | rc = netlink_broadcast(nls, skb, 0, 1, gfp); |
53cb8a1f | 602 | if (rc < 0) { |
53cb8a1f MC |
603 | printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc); |
604 | return rc; | |
605 | } | |
606 | ||
53cb8a1f MC |
607 | return 0; |
608 | } | |
609 | ||
0896b752 | 610 | static int |
43a145a3 | 611 | iscsi_unicast_skb(struct sk_buff *skb, int pid) |
0896b752 | 612 | { |
0896b752 | 613 | int rc; |
1da177e4 | 614 | |
790f39a2 | 615 | rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT); |
0896b752 | 616 | if (rc < 0) { |
0896b752 AA |
617 | printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc); |
618 | return rc; | |
619 | } | |
620 | ||
0896b752 | 621 | return 0; |
1da177e4 | 622 | } |
1da177e4 | 623 | |
7b7232f3 | 624 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 625 | char *data, uint32_t data_size) |
1da177e4 | 626 | { |
0896b752 AA |
627 | struct nlmsghdr *nlh; |
628 | struct sk_buff *skb; | |
629 | struct iscsi_uevent *ev; | |
0896b752 | 630 | char *pdu; |
790f39a2 | 631 | struct iscsi_internal *priv; |
0896b752 AA |
632 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
633 | data_size); | |
634 | ||
790f39a2 MC |
635 | priv = iscsi_if_transport_lookup(conn->transport); |
636 | if (!priv) | |
637 | return -EINVAL; | |
638 | ||
43a145a3 | 639 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 640 | if (!skb) { |
7b7232f3 | 641 | iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED); |
7b8631b5 MC |
642 | dev_printk(KERN_ERR, &conn->dev, "iscsi: can not deliver " |
643 | "control PDU: OOM\n"); | |
0896b752 AA |
644 | return -ENOMEM; |
645 | } | |
1da177e4 | 646 | |
790f39a2 | 647 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
648 | ev = NLMSG_DATA(nlh); |
649 | memset(ev, 0, sizeof(*ev)); | |
650 | ev->transport_handle = iscsi_handle(conn->transport); | |
651 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
652 | ev->r.recv_req.cid = conn->cid; |
653 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
654 | pdu = (char*)ev + sizeof(*ev); |
655 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
656 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 657 | |
43a145a3 | 658 | return iscsi_unicast_skb(skb, priv->daemon_pid); |
1da177e4 | 659 | } |
0896b752 | 660 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 661 | |
7b7232f3 | 662 | void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 663 | { |
0896b752 AA |
664 | struct nlmsghdr *nlh; |
665 | struct sk_buff *skb; | |
666 | struct iscsi_uevent *ev; | |
790f39a2 | 667 | struct iscsi_internal *priv; |
0896b752 AA |
668 | int len = NLMSG_SPACE(sizeof(*ev)); |
669 | ||
790f39a2 MC |
670 | priv = iscsi_if_transport_lookup(conn->transport); |
671 | if (!priv) | |
672 | return; | |
673 | ||
43a145a3 | 674 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 675 | if (!skb) { |
7b8631b5 MC |
676 | dev_printk(KERN_ERR, &conn->dev, "iscsi: gracefully ignored " |
677 | "conn error (%d)\n", error); | |
0896b752 AA |
678 | return; |
679 | } | |
680 | ||
790f39a2 | 681 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
682 | ev = NLMSG_DATA(nlh); |
683 | ev->transport_handle = iscsi_handle(conn->transport); | |
684 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 685 | ev->r.connerror.error = error; |
b5c7a12d MC |
686 | ev->r.connerror.cid = conn->cid; |
687 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 688 | |
43a145a3 | 689 | iscsi_broadcast_skb(skb, GFP_ATOMIC); |
1da177e4 | 690 | |
7b8631b5 MC |
691 | dev_printk(KERN_INFO, &conn->dev, "iscsi: detected conn error (%d)\n", |
692 | error); | |
0896b752 AA |
693 | } |
694 | EXPORT_SYMBOL_GPL(iscsi_conn_error); | |
695 | ||
696 | static int | |
697 | iscsi_if_send_reply(int pid, int seq, int type, int done, int multi, | |
698 | void *payload, int size) | |
699 | { | |
700 | struct sk_buff *skb; | |
701 | struct nlmsghdr *nlh; | |
702 | int len = NLMSG_SPACE(size); | |
703 | int flags = multi ? NLM_F_MULTI : 0; | |
704 | int t = done ? NLMSG_DONE : type; | |
705 | ||
43a145a3 | 706 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
707 | if (!skb) { |
708 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
709 | return -ENOMEM; | |
710 | } | |
0896b752 AA |
711 | |
712 | nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0); | |
713 | nlh->nlmsg_flags = flags; | |
714 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43a145a3 | 715 | return iscsi_unicast_skb(skb, pid); |
1da177e4 | 716 | } |
1da177e4 | 717 | |
7b8631b5 | 718 | static int |
5b940adf | 719 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
720 | { |
721 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
722 | struct iscsi_stats *stats; | |
723 | struct sk_buff *skbstat; | |
724 | struct iscsi_cls_conn *conn; | |
725 | struct nlmsghdr *nlhstat; | |
726 | struct iscsi_uevent *evstat; | |
790f39a2 | 727 | struct iscsi_internal *priv; |
7b8631b5 MC |
728 | int len = NLMSG_SPACE(sizeof(*ev) + |
729 | sizeof(struct iscsi_stats) + | |
730 | sizeof(struct iscsi_stats_custom) * | |
731 | ISCSI_STATS_CUSTOM_MAX); | |
732 | int err = 0; | |
0896b752 | 733 | |
790f39a2 MC |
734 | priv = iscsi_if_transport_lookup(transport); |
735 | if (!priv) | |
736 | return -EINVAL; | |
737 | ||
b5c7a12d | 738 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
739 | if (!conn) |
740 | return -EEXIST; | |
0896b752 | 741 | |
7b8631b5 MC |
742 | do { |
743 | int actual_size; | |
0896b752 | 744 | |
43a145a3 | 745 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 MC |
746 | if (!skbstat) { |
747 | dev_printk(KERN_ERR, &conn->dev, "iscsi: can not " | |
748 | "deliver stats: OOM\n"); | |
749 | return -ENOMEM; | |
750 | } | |
751 | ||
790f39a2 | 752 | nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0, |
7b8631b5 MC |
753 | (len - sizeof(*nlhstat)), 0); |
754 | evstat = NLMSG_DATA(nlhstat); | |
755 | memset(evstat, 0, sizeof(*evstat)); | |
756 | evstat->transport_handle = iscsi_handle(conn->transport); | |
757 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
758 | evstat->u.get_stats.cid = |
759 | ev->u.get_stats.cid; | |
760 | evstat->u.get_stats.sid = | |
761 | ev->u.get_stats.sid; | |
7b8631b5 MC |
762 | stats = (struct iscsi_stats *) |
763 | ((char*)evstat + sizeof(*evstat)); | |
764 | memset(stats, 0, sizeof(*stats)); | |
765 | ||
7b7232f3 | 766 | transport->get_stats(conn, stats); |
7b8631b5 MC |
767 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
768 | sizeof(struct iscsi_stats) + | |
769 | sizeof(struct iscsi_stats_custom) * | |
770 | stats->custom_length); | |
771 | actual_size -= sizeof(*nlhstat); | |
772 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 773 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
774 | nlhstat->nlmsg_len = actual_size; |
775 | ||
43a145a3 | 776 | err = iscsi_unicast_skb(skbstat, priv->daemon_pid); |
7b8631b5 MC |
777 | } while (err < 0 && err != -ECONNREFUSED); |
778 | ||
779 | return err; | |
0896b752 AA |
780 | } |
781 | ||
53cb8a1f | 782 | /** |
26974789 MC |
783 | * iscsi_session_event - send session destr. completion event |
784 | * @session: iscsi class session | |
785 | * @event: type of event | |
eb44820c | 786 | */ |
26974789 MC |
787 | int iscsi_session_event(struct iscsi_cls_session *session, |
788 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
789 | { |
790 | struct iscsi_internal *priv; | |
53cb8a1f MC |
791 | struct Scsi_Host *shost; |
792 | struct iscsi_uevent *ev; | |
793 | struct sk_buff *skb; | |
794 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
795 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
796 | ||
26974789 | 797 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
798 | if (!priv) |
799 | return -EINVAL; | |
53cb8a1f MC |
800 | shost = iscsi_session_to_shost(session); |
801 | ||
43a145a3 | 802 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 803 | if (!skb) { |
26974789 MC |
804 | dev_printk(KERN_ERR, &session->dev, "Cannot notify userspace " |
805 | "of session event %u\n", event); | |
53cb8a1f MC |
806 | return -ENOMEM; |
807 | } | |
808 | ||
809 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
810 | ev = NLMSG_DATA(nlh); | |
26974789 | 811 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 812 | |
26974789 MC |
813 | ev->type = event; |
814 | switch (event) { | |
815 | case ISCSI_KEVENT_DESTROY_SESSION: | |
816 | ev->r.d_session.host_no = shost->host_no; | |
817 | ev->r.d_session.sid = session->sid; | |
818 | break; | |
819 | case ISCSI_KEVENT_CREATE_SESSION: | |
820 | ev->r.c_session_ret.host_no = shost->host_no; | |
821 | ev->r.c_session_ret.sid = session->sid; | |
822 | break; | |
823 | case ISCSI_KEVENT_UNBIND_SESSION: | |
824 | ev->r.unbind_session.host_no = shost->host_no; | |
825 | ev->r.unbind_session.sid = session->sid; | |
826 | break; | |
827 | default: | |
828 | dev_printk(KERN_ERR, &session->dev, "Invalid event %u.\n", | |
829 | event); | |
830 | kfree_skb(skb); | |
53cb8a1f | 831 | return -EINVAL; |
53cb8a1f MC |
832 | } |
833 | ||
53cb8a1f MC |
834 | /* |
835 | * this will occur if the daemon is not up, so we just warn | |
836 | * the user and when the daemon is restarted it will handle it | |
837 | */ | |
43a145a3 | 838 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
53cb8a1f | 839 | if (rc < 0) |
26974789 MC |
840 | dev_printk(KERN_ERR, &session->dev, "Cannot notify userspace " |
841 | "of session event %u. Check iscsi daemon\n", event); | |
53cb8a1f MC |
842 | return rc; |
843 | } | |
26974789 | 844 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 845 | |
0896b752 AA |
846 | static int |
847 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev) | |
848 | { | |
849 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 850 | struct iscsi_cls_session *session; |
b5c7a12d | 851 | uint32_t hostno; |
0896b752 | 852 | |
7996a778 | 853 | session = transport->create_session(transport, &priv->t, |
1548271e MC |
854 | ev->u.c_session.cmds_max, |
855 | ev->u.c_session.queue_depth, | |
7b7232f3 | 856 | ev->u.c_session.initial_cmdsn, |
b5c7a12d | 857 | &hostno); |
7b7232f3 | 858 | if (!session) |
7b8631b5 | 859 | return -ENOMEM; |
0896b752 | 860 | |
b5c7a12d MC |
861 | ev->r.c_session_ret.host_no = hostno; |
862 | ev->r.c_session_ret.sid = session->sid; | |
0896b752 | 863 | return 0; |
0896b752 AA |
864 | } |
865 | ||
866 | static int | |
7b7232f3 | 867 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 868 | { |
7b8631b5 | 869 | struct iscsi_cls_conn *conn; |
7b7232f3 | 870 | struct iscsi_cls_session *session; |
7b8631b5 | 871 | |
b5c7a12d MC |
872 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
873 | if (!session) { | |
874 | printk(KERN_ERR "iscsi: invalid session %d\n", | |
875 | ev->u.c_conn.sid); | |
7b8631b5 | 876 | return -EINVAL; |
b5c7a12d | 877 | } |
0896b752 | 878 | |
7b7232f3 | 879 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d MC |
880 | if (!conn) { |
881 | printk(KERN_ERR "iscsi: couldn't create a new " | |
882 | "connection for session %d\n", | |
883 | session->sid); | |
7b7232f3 | 884 | return -ENOMEM; |
b5c7a12d | 885 | } |
0896b752 | 886 | |
b5c7a12d MC |
887 | ev->r.c_conn_ret.sid = session->sid; |
888 | ev->r.c_conn_ret.cid = conn->cid; | |
0896b752 | 889 | return 0; |
1da177e4 LT |
890 | } |
891 | ||
0896b752 AA |
892 | static int |
893 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
894 | { | |
7b8631b5 | 895 | struct iscsi_cls_conn *conn; |
0896b752 | 896 | |
b5c7a12d | 897 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 898 | if (!conn) |
7b8631b5 | 899 | return -EINVAL; |
0896b752 | 900 | |
7b8631b5 MC |
901 | if (transport->destroy_conn) |
902 | transport->destroy_conn(conn); | |
7b8631b5 | 903 | return 0; |
0896b752 AA |
904 | } |
905 | ||
fd7255f5 MC |
906 | static int |
907 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
908 | { | |
909 | char *data = (char*)ev + sizeof(*ev); | |
910 | struct iscsi_cls_conn *conn; | |
911 | struct iscsi_cls_session *session; | |
a54a52ca | 912 | int err = 0, value = 0; |
fd7255f5 MC |
913 | |
914 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
915 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
916 | if (!conn || !session) | |
917 | return -EINVAL; | |
918 | ||
919 | switch (ev->u.set_param.param) { | |
30a6c652 | 920 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 921 | sscanf(data, "%d", &value); |
30a6c652 MC |
922 | if (value != 0) |
923 | session->recovery_tmo = value; | |
924 | break; | |
fd7255f5 | 925 | default: |
a54a52ca MC |
926 | err = transport->set_param(conn, ev->u.set_param.param, |
927 | data, ev->u.set_param.len); | |
fd7255f5 MC |
928 | } |
929 | ||
930 | return err; | |
931 | } | |
932 | ||
264faaaa OG |
933 | static int |
934 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
935 | struct iscsi_uevent *ev, int msg_type) | |
936 | { | |
937 | struct sockaddr *dst_addr; | |
938 | int rc = 0; | |
939 | ||
940 | switch (msg_type) { | |
941 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: | |
942 | if (!transport->ep_connect) | |
943 | return -EINVAL; | |
944 | ||
945 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
946 | rc = transport->ep_connect(dst_addr, | |
947 | ev->u.ep_connect.non_blocking, | |
948 | &ev->r.ep_connect_ret.handle); | |
949 | break; | |
950 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
951 | if (!transport->ep_poll) | |
952 | return -EINVAL; | |
953 | ||
954 | ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle, | |
955 | ev->u.ep_poll.timeout_ms); | |
956 | break; | |
957 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
958 | if (!transport->ep_disconnect) | |
959 | return -EINVAL; | |
960 | ||
961 | transport->ep_disconnect(ev->u.ep_disconnect.ep_handle); | |
962 | break; | |
963 | } | |
964 | return rc; | |
965 | } | |
966 | ||
01cb225d MC |
967 | static int |
968 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
969 | struct iscsi_uevent *ev) | |
970 | { | |
2174a04e | 971 | struct Scsi_Host *shost; |
01cb225d | 972 | struct sockaddr *dst_addr; |
2174a04e | 973 | int err; |
01cb225d MC |
974 | |
975 | if (!transport->tgt_dscvr) | |
976 | return -EINVAL; | |
977 | ||
2174a04e MC |
978 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
979 | if (IS_ERR(shost)) { | |
980 | printk(KERN_ERR "target discovery could not find host no %u\n", | |
981 | ev->u.tgt_dscvr.host_no); | |
982 | return -ENODEV; | |
983 | } | |
984 | ||
985 | ||
01cb225d | 986 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
987 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
988 | ev->u.tgt_dscvr.enable, dst_addr); | |
989 | scsi_host_put(shost); | |
990 | return err; | |
01cb225d MC |
991 | } |
992 | ||
1d9bf13a MC |
993 | static int |
994 | iscsi_set_host_param(struct iscsi_transport *transport, | |
995 | struct iscsi_uevent *ev) | |
996 | { | |
997 | char *data = (char*)ev + sizeof(*ev); | |
998 | struct Scsi_Host *shost; | |
999 | int err; | |
1000 | ||
1001 | if (!transport->set_host_param) | |
1002 | return -ENOSYS; | |
1003 | ||
1004 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
1005 | if (IS_ERR(shost)) { | |
1006 | printk(KERN_ERR "set_host_param could not find host no %u\n", | |
1007 | ev->u.set_host_param.host_no); | |
1008 | return -ENODEV; | |
1009 | } | |
1010 | ||
1011 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1012 | data, ev->u.set_host_param.len); | |
1013 | scsi_host_put(shost); | |
1014 | return err; | |
1015 | } | |
1016 | ||
0896b752 AA |
1017 | static int |
1018 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) | |
1019 | { | |
1020 | int err = 0; | |
1021 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1022 | struct iscsi_transport *transport = NULL; | |
1023 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1024 | struct iscsi_cls_session *session; |
1025 | struct iscsi_cls_conn *conn; | |
0896b752 | 1026 | |
0896b752 AA |
1027 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1028 | if (!priv) | |
1029 | return -EINVAL; | |
1030 | transport = priv->iscsi_transport; | |
1031 | ||
7b7232f3 MC |
1032 | if (!try_module_get(transport->owner)) |
1033 | return -EINVAL; | |
1034 | ||
790f39a2 MC |
1035 | priv->daemon_pid = NETLINK_CREDS(skb)->pid; |
1036 | ||
0896b752 AA |
1037 | switch (nlh->nlmsg_type) { |
1038 | case ISCSI_UEVENT_CREATE_SESSION: | |
1039 | err = iscsi_if_create_session(priv, ev); | |
1040 | break; | |
1041 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1042 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1043 | if (session) |
7b7232f3 | 1044 | transport->destroy_session(session); |
26974789 MC |
1045 | else |
1046 | err = -EINVAL; | |
1047 | break; | |
1048 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1049 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1050 | if (session) | |
1051 | iscsi_unbind_session(session); | |
1052 | else | |
7b7232f3 | 1053 | err = -EINVAL; |
0896b752 AA |
1054 | break; |
1055 | case ISCSI_UEVENT_CREATE_CONN: | |
1056 | err = iscsi_if_create_conn(transport, ev); | |
1057 | break; | |
1058 | case ISCSI_UEVENT_DESTROY_CONN: | |
1059 | err = iscsi_if_destroy_conn(transport, ev); | |
1060 | break; | |
1061 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1062 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1063 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 MC |
1064 | |
1065 | if (session && conn) | |
1066 | ev->r.retcode = transport->bind_conn(session, conn, | |
264faaaa | 1067 | ev->u.b_conn.transport_eph, |
7b7232f3 MC |
1068 | ev->u.b_conn.is_leading); |
1069 | else | |
1070 | err = -EINVAL; | |
0896b752 AA |
1071 | break; |
1072 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1073 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1074 | break; |
1075 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1076 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1077 | if (conn) |
1078 | ev->r.retcode = transport->start_conn(conn); | |
1079 | else | |
1080 | err = -EINVAL; | |
0896b752 AA |
1081 | break; |
1082 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1083 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1084 | if (conn) |
1085 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1086 | else | |
1087 | err = -EINVAL; | |
0896b752 AA |
1088 | break; |
1089 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1090 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1091 | if (conn) |
1092 | ev->r.retcode = transport->send_pdu(conn, | |
1093 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1094 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1095 | ev->u.send_pdu.data_size); | |
1096 | else | |
1097 | err = -EINVAL; | |
0896b752 AA |
1098 | break; |
1099 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1100 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1101 | break; |
264faaaa OG |
1102 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1103 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1104 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1105 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); | |
1106 | break; | |
01cb225d MC |
1107 | case ISCSI_UEVENT_TGT_DSCVR: |
1108 | err = iscsi_tgt_dscvr(transport, ev); | |
1109 | break; | |
1d9bf13a MC |
1110 | case ISCSI_UEVENT_SET_HOST_PARAM: |
1111 | err = iscsi_set_host_param(transport, ev); | |
1112 | break; | |
0896b752 | 1113 | default: |
1d9bf13a | 1114 | err = -ENOSYS; |
0896b752 AA |
1115 | break; |
1116 | } | |
1117 | ||
7b7232f3 | 1118 | module_put(transport->owner); |
0896b752 AA |
1119 | return err; |
1120 | } | |
1121 | ||
b5c7a12d | 1122 | /* |
cd40b7d3 DL |
1123 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
1124 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 1125 | */ |
0896b752 | 1126 | static void |
cd40b7d3 | 1127 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 1128 | { |
0b950672 | 1129 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
1130 | while (skb->len >= NLMSG_SPACE(0)) { |
1131 | int err; | |
1132 | uint32_t rlen; | |
1133 | struct nlmsghdr *nlh; | |
1134 | struct iscsi_uevent *ev; | |
1135 | ||
1136 | nlh = nlmsg_hdr(skb); | |
1137 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
1138 | skb->len < nlh->nlmsg_len) { | |
1139 | break; | |
ee7f8e40 | 1140 | } |
ee7f8e40 | 1141 | |
cd40b7d3 DL |
1142 | ev = NLMSG_DATA(nlh); |
1143 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1144 | if (rlen > skb->len) | |
1145 | rlen = skb->len; | |
0896b752 | 1146 | |
cd40b7d3 DL |
1147 | err = iscsi_if_recv_msg(skb, nlh); |
1148 | if (err) { | |
1149 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1150 | ev->iferror = err; | |
0896b752 | 1151 | } |
cd40b7d3 DL |
1152 | do { |
1153 | /* | |
1154 | * special case for GET_STATS: | |
1155 | * on success - sending reply and stats from | |
1156 | * inside of if_recv_msg(), | |
1157 | * on error - fall through. | |
1158 | */ | |
1159 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1160 | break; | |
1161 | err = iscsi_if_send_reply( | |
1162 | NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq, | |
1163 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); | |
1164 | } while (err < 0 && err != -ECONNREFUSED); | |
1165 | skb_pull(skb, rlen); | |
0896b752 | 1166 | } |
0b950672 | 1167 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1168 | } |
1da177e4 | 1169 | |
7b8631b5 MC |
1170 | #define iscsi_cdev_to_conn(_cdev) \ |
1171 | iscsi_dev_to_conn(_cdev->dev) | |
1172 | ||
fd7255f5 MC |
1173 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
1174 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
1175 | __ATTR(_name,_mode,_show,_store) | |
1176 | ||
1da177e4 | 1177 | /* |
0896b752 | 1178 | * iSCSI connection attrs |
1da177e4 | 1179 | */ |
a54a52ca | 1180 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1181 | static ssize_t \ |
a54a52ca | 1182 | show_conn_param_##param(struct class_device *cdev, char *buf) \ |
0896b752 | 1183 | { \ |
7b8631b5 MC |
1184 | struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \ |
1185 | struct iscsi_transport *t = conn->transport; \ | |
a54a52ca | 1186 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1187 | } |
1188 | ||
a54a52ca MC |
1189 | #define iscsi_conn_attr(field, param) \ |
1190 | iscsi_conn_attr_show(param) \ | |
1191 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1192 | NULL); |
0896b752 | 1193 | |
a54a52ca MC |
1194 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1195 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1196 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1197 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1198 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1199 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1200 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
1201 | iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT); | |
1202 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); | |
1203 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
1204 | iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
f6d5180c MC |
1205 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
1206 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 | 1207 | |
7b8631b5 MC |
1208 | #define iscsi_cdev_to_session(_cdev) \ |
1209 | iscsi_dev_to_session(_cdev->dev) | |
1210 | ||
1da177e4 | 1211 | /* |
0896b752 | 1212 | * iSCSI session attrs |
1da177e4 | 1213 | */ |
b2c64167 | 1214 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 1215 | static ssize_t \ |
a54a52ca | 1216 | show_session_param_##param(struct class_device *cdev, char *buf) \ |
fd7255f5 MC |
1217 | { \ |
1218 | struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \ | |
1219 | struct iscsi_transport *t = session->transport; \ | |
b2c64167 MC |
1220 | \ |
1221 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
1222 | return -EACCES; \ | |
a54a52ca | 1223 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
1224 | } |
1225 | ||
b2c64167 MC |
1226 | #define iscsi_session_attr(field, param, perm) \ |
1227 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 1228 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 MC |
1229 | NULL); |
1230 | ||
b2c64167 MC |
1231 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
1232 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
1233 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
1234 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
1235 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
1236 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
1237 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
1238 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
1239 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
1240 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
1241 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
1242 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
1243 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
1244 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
1245 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
1246 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
1247 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
1da177e4 | 1248 | |
fd7255f5 MC |
1249 | #define iscsi_priv_session_attr_show(field, format) \ |
1250 | static ssize_t \ | |
a54a52ca | 1251 | show_priv_session_##field(struct class_device *cdev, char *buf) \ |
fd7255f5 | 1252 | { \ |
a54a52ca | 1253 | struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev);\ |
fd7255f5 MC |
1254 | return sprintf(buf, format"\n", session->field); \ |
1255 | } | |
1256 | ||
1257 | #define iscsi_priv_session_attr(field, format) \ | |
1258 | iscsi_priv_session_attr_show(field, format) \ | |
1259 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \ | |
1260 | NULL) | |
30a6c652 | 1261 | iscsi_priv_session_attr(recovery_tmo, "%d"); |
fd7255f5 | 1262 | |
1819dc81 MC |
1263 | /* |
1264 | * iSCSI host attrs | |
1265 | */ | |
1266 | #define iscsi_host_attr_show(param) \ | |
1267 | static ssize_t \ | |
1268 | show_host_param_##param(struct class_device *cdev, char *buf) \ | |
1269 | { \ | |
1270 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
1271 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ | |
1272 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
1273 | } | |
1274 | ||
1275 | #define iscsi_host_attr(field, param) \ | |
1276 | iscsi_host_attr_show(param) \ | |
1277 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
1278 | NULL); | |
1279 | ||
d8196ed2 | 1280 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 1281 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 1282 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 1283 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 1284 | |
fd7255f5 MC |
1285 | #define SETUP_PRIV_SESSION_RD_ATTR(field) \ |
1286 | do { \ | |
1287 | priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \ | |
1288 | count++; \ | |
1289 | } while (0) | |
1290 | ||
a54a52ca | 1291 | |
fd7255f5 MC |
1292 | #define SETUP_SESSION_RD_ATTR(field, param_flag) \ |
1293 | do { \ | |
1294 | if (tt->param_mask & param_flag) { \ | |
1295 | priv->session_attrs[count] = &class_device_attr_sess_##field; \ | |
1da177e4 | 1296 | count++; \ |
fd7255f5 MC |
1297 | } \ |
1298 | } while (0) | |
1299 | ||
fd7255f5 MC |
1300 | #define SETUP_CONN_RD_ATTR(field, param_flag) \ |
1301 | do { \ | |
1302 | if (tt->param_mask & param_flag) { \ | |
1303 | priv->conn_attrs[count] = &class_device_attr_conn_##field; \ | |
1304 | count++; \ | |
1305 | } \ | |
1306 | } while (0) | |
1da177e4 | 1307 | |
1819dc81 MC |
1308 | #define SETUP_HOST_RD_ATTR(field, param_flag) \ |
1309 | do { \ | |
1310 | if (tt->host_param_mask & param_flag) { \ | |
1311 | priv->host_attrs[count] = &class_device_attr_host_##field; \ | |
1312 | count++; \ | |
1313 | } \ | |
1314 | } while (0) | |
1315 | ||
0896b752 AA |
1316 | static int iscsi_session_match(struct attribute_container *cont, |
1317 | struct device *dev) | |
1da177e4 | 1318 | { |
7b8631b5 | 1319 | struct iscsi_cls_session *session; |
1da177e4 | 1320 | struct Scsi_Host *shost; |
0896b752 AA |
1321 | struct iscsi_internal *priv; |
1322 | ||
1323 | if (!iscsi_is_session_dev(dev)) | |
1324 | return 0; | |
1da177e4 | 1325 | |
7b8631b5 MC |
1326 | session = iscsi_dev_to_session(dev); |
1327 | shost = iscsi_session_to_shost(session); | |
0896b752 | 1328 | if (!shost->transportt) |
1da177e4 LT |
1329 | return 0; |
1330 | ||
0896b752 AA |
1331 | priv = to_iscsi_internal(shost->transportt); |
1332 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
1333 | return 0; |
1334 | ||
0896b752 | 1335 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
1336 | } |
1337 | ||
0896b752 AA |
1338 | static int iscsi_conn_match(struct attribute_container *cont, |
1339 | struct device *dev) | |
1340 | { | |
7b8631b5 MC |
1341 | struct iscsi_cls_session *session; |
1342 | struct iscsi_cls_conn *conn; | |
1da177e4 | 1343 | struct Scsi_Host *shost; |
0896b752 | 1344 | struct iscsi_internal *priv; |
1da177e4 | 1345 | |
0896b752 | 1346 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
1347 | return 0; |
1348 | ||
7b8631b5 MC |
1349 | conn = iscsi_dev_to_conn(dev); |
1350 | session = iscsi_dev_to_session(conn->dev.parent); | |
1351 | shost = iscsi_session_to_shost(session); | |
1352 | ||
0896b752 | 1353 | if (!shost->transportt) |
1da177e4 LT |
1354 | return 0; |
1355 | ||
0896b752 AA |
1356 | priv = to_iscsi_internal(shost->transportt); |
1357 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
1358 | return 0; | |
1da177e4 | 1359 | |
0896b752 AA |
1360 | return &priv->conn_cont.ac == cont; |
1361 | } | |
1362 | ||
30a6c652 MC |
1363 | static int iscsi_host_match(struct attribute_container *cont, |
1364 | struct device *dev) | |
1365 | { | |
1366 | struct Scsi_Host *shost; | |
1367 | struct iscsi_internal *priv; | |
1368 | ||
1369 | if (!scsi_is_host_device(dev)) | |
1370 | return 0; | |
1371 | ||
1372 | shost = dev_to_shost(dev); | |
1373 | if (!shost->transportt || | |
1374 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
1375 | return 0; | |
1376 | ||
1377 | priv = to_iscsi_internal(shost->transportt); | |
1378 | return &priv->t.host_attrs.ac == cont; | |
1379 | } | |
1380 | ||
7b8631b5 MC |
1381 | struct scsi_transport_template * |
1382 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
1383 | { |
1384 | struct iscsi_internal *priv; | |
1385 | unsigned long flags; | |
1386 | int count = 0, err; | |
1387 | ||
1388 | BUG_ON(!tt); | |
1389 | ||
1390 | priv = iscsi_if_transport_lookup(tt); | |
1391 | if (priv) | |
7b8631b5 | 1392 | return NULL; |
0896b752 | 1393 | |
24669f75 | 1394 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 1395 | if (!priv) |
7b8631b5 | 1396 | return NULL; |
0896b752 | 1397 | INIT_LIST_HEAD(&priv->list); |
53cb8a1f | 1398 | priv->daemon_pid = -1; |
0896b752 | 1399 | priv->iscsi_transport = tt; |
30a6c652 | 1400 | priv->t.user_scan = iscsi_user_scan; |
0896b752 AA |
1401 | |
1402 | priv->cdev.class = &iscsi_transport_class; | |
1403 | snprintf(priv->cdev.class_id, BUS_ID_SIZE, "%s", tt->name); | |
1404 | err = class_device_register(&priv->cdev); | |
1405 | if (err) | |
1406 | goto free_priv; | |
1407 | ||
1408 | err = sysfs_create_group(&priv->cdev.kobj, &iscsi_transport_group); | |
1409 | if (err) | |
1410 | goto unregister_cdev; | |
1411 | ||
30a6c652 MC |
1412 | /* host parameters */ |
1413 | priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; | |
1414 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; | |
1415 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
1416 | priv->t.host_size = sizeof(struct iscsi_host); | |
30a6c652 MC |
1417 | transport_container_register(&priv->t.host_attrs); |
1418 | ||
d8196ed2 | 1419 | SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); |
22236961 | 1420 | SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS); |
1819dc81 | 1421 | SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS); |
8ad5781a | 1422 | SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME); |
1819dc81 MC |
1423 | BUG_ON(count > ISCSI_HOST_ATTRS); |
1424 | priv->host_attrs[count] = NULL; | |
1425 | count = 0; | |
1426 | ||
0896b752 AA |
1427 | /* connection parameters */ |
1428 | priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; | |
1429 | priv->conn_cont.ac.class = &iscsi_connection_class.class; | |
1430 | priv->conn_cont.ac.match = iscsi_conn_match; | |
1431 | transport_container_register(&priv->conn_cont); | |
1da177e4 | 1432 | |
fd7255f5 MC |
1433 | SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH); |
1434 | SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH); | |
1435 | SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN); | |
1436 | SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN); | |
1437 | SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN); | |
1438 | SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN); | |
1439 | SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS); | |
1440 | SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT); | |
8d2860b3 | 1441 | SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN); |
a54a52ca MC |
1442 | SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS); |
1443 | SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT); | |
f6d5180c MC |
1444 | SETUP_CONN_RD_ATTR(ping_tmo, ISCSI_PING_TMO); |
1445 | SETUP_CONN_RD_ATTR(recv_tmo, ISCSI_RECV_TMO); | |
0896b752 AA |
1446 | |
1447 | BUG_ON(count > ISCSI_CONN_ATTRS); | |
1448 | priv->conn_attrs[count] = NULL; | |
1da177e4 | 1449 | count = 0; |
1da177e4 | 1450 | |
0896b752 AA |
1451 | /* session parameters */ |
1452 | priv->session_cont.ac.attrs = &priv->session_attrs[0]; | |
1453 | priv->session_cont.ac.class = &iscsi_session_class.class; | |
1454 | priv->session_cont.ac.match = iscsi_session_match; | |
1455 | transport_container_register(&priv->session_cont); | |
1456 | ||
fd7255f5 MC |
1457 | SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN); |
1458 | SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T); | |
1459 | SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN); | |
1460 | SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST); | |
1461 | SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST); | |
1462 | SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN); | |
1463 | SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN); | |
1464 | SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL); | |
a54a52ca MC |
1465 | SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME); |
1466 | SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT); | |
b2c64167 MC |
1467 | SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME); |
1468 | SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN); | |
1469 | SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD); | |
1470 | SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN); | |
843c0a8a | 1471 | SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); |
4cd49ea1 MC |
1472 | SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO); |
1473 | SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO); | |
30a6c652 | 1474 | SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); |
fd7255f5 | 1475 | |
0896b752 AA |
1476 | BUG_ON(count > ISCSI_SESSION_ATTRS); |
1477 | priv->session_attrs[count] = NULL; | |
1478 | ||
1479 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1480 | list_add(&priv->list, &iscsi_transports); | |
1481 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1482 | ||
1483 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 1484 | return &priv->t; |
1da177e4 | 1485 | |
0896b752 AA |
1486 | unregister_cdev: |
1487 | class_device_unregister(&priv->cdev); | |
1488 | free_priv: | |
1489 | kfree(priv); | |
7b8631b5 | 1490 | return NULL; |
1da177e4 | 1491 | } |
0896b752 AA |
1492 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
1493 | ||
1494 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
1495 | { | |
1496 | struct iscsi_internal *priv; | |
1497 | unsigned long flags; | |
1498 | ||
1499 | BUG_ON(!tt); | |
1500 | ||
0b950672 | 1501 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
1502 | |
1503 | priv = iscsi_if_transport_lookup(tt); | |
1504 | BUG_ON (!priv); | |
1505 | ||
0896b752 AA |
1506 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
1507 | list_del(&priv->list); | |
1508 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1509 | ||
1510 | transport_container_unregister(&priv->conn_cont); | |
1511 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 1512 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 AA |
1513 | |
1514 | sysfs_remove_group(&priv->cdev.kobj, &iscsi_transport_group); | |
1515 | class_device_unregister(&priv->cdev); | |
0b950672 | 1516 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 1517 | |
0896b752 AA |
1518 | return 0; |
1519 | } | |
1520 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 1521 | |
1da177e4 LT |
1522 | static __init int iscsi_transport_init(void) |
1523 | { | |
0896b752 | 1524 | int err; |
1da177e4 | 1525 | |
09492605 | 1526 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
1527 | ISCSI_TRANSPORT_VERSION); |
1528 | ||
41be1444 MC |
1529 | atomic_set(&iscsi_session_nr, 0); |
1530 | ||
0896b752 | 1531 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
1532 | if (err) |
1533 | return err; | |
0896b752 | 1534 | |
30a6c652 | 1535 | err = transport_class_register(&iscsi_host_class); |
0896b752 AA |
1536 | if (err) |
1537 | goto unregister_transport_class; | |
1538 | ||
30a6c652 MC |
1539 | err = transport_class_register(&iscsi_connection_class); |
1540 | if (err) | |
1541 | goto unregister_host_class; | |
1542 | ||
0896b752 AA |
1543 | err = transport_class_register(&iscsi_session_class); |
1544 | if (err) | |
1545 | goto unregister_conn_class; | |
1546 | ||
b4b51029 | 1547 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL, |
7b8631b5 | 1548 | THIS_MODULE); |
0896b752 AA |
1549 | if (!nls) { |
1550 | err = -ENOBUFS; | |
43a145a3 | 1551 | goto unregister_session_class; |
0896b752 AA |
1552 | } |
1553 | ||
d8bf541e MC |
1554 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
1555 | if (!iscsi_eh_timer_workq) | |
1556 | goto release_nls; | |
1557 | ||
43a145a3 | 1558 | return 0; |
0896b752 | 1559 | |
d8bf541e MC |
1560 | release_nls: |
1561 | sock_release(nls->sk_socket); | |
0896b752 AA |
1562 | unregister_session_class: |
1563 | transport_class_unregister(&iscsi_session_class); | |
1564 | unregister_conn_class: | |
1565 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
1566 | unregister_host_class: |
1567 | transport_class_unregister(&iscsi_host_class); | |
0896b752 AA |
1568 | unregister_transport_class: |
1569 | class_unregister(&iscsi_transport_class); | |
1570 | return err; | |
1da177e4 LT |
1571 | } |
1572 | ||
1573 | static void __exit iscsi_transport_exit(void) | |
1574 | { | |
d8bf541e | 1575 | destroy_workqueue(iscsi_eh_timer_workq); |
0896b752 | 1576 | sock_release(nls->sk_socket); |
0896b752 AA |
1577 | transport_class_unregister(&iscsi_connection_class); |
1578 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 1579 | transport_class_unregister(&iscsi_host_class); |
0896b752 | 1580 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
1581 | } |
1582 | ||
1583 | module_init(iscsi_transport_init); | |
1584 | module_exit(iscsi_transport_exit); | |
1585 | ||
0896b752 AA |
1586 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
1587 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
1588 | "Alex Aizman <itn780@yahoo.com>"); | |
1589 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 1590 | MODULE_LICENSE("GPL"); |
f4246b33 | 1591 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |