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 | |
88dfd340 | 33 | #define ISCSI_SESSION_ATTRS 21 |
c238c3bb | 34 | #define ISCSI_CONN_ATTRS 13 |
d8196ed2 | 35 | #define ISCSI_HOST_ATTRS 4 |
d82ff9be | 36 | |
4c2133c8 | 37 | #define ISCSI_TRANSPORT_VERSION "2.0-870" |
1da177e4 LT |
38 | |
39 | struct iscsi_internal { | |
790f39a2 | 40 | int daemon_pid; |
1da177e4 | 41 | struct scsi_transport_template t; |
0896b752 AA |
42 | struct iscsi_transport *iscsi_transport; |
43 | struct list_head list; | |
ee959b00 | 44 | struct device dev; |
30a6c652 | 45 | |
ee959b00 | 46 | struct device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1]; |
0896b752 | 47 | struct transport_container conn_cont; |
ee959b00 | 48 | struct device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1]; |
0896b752 | 49 | struct transport_container session_cont; |
ee959b00 | 50 | struct device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1]; |
1da177e4 LT |
51 | }; |
52 | ||
41be1444 | 53 | static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ |
d8bf541e | 54 | static struct workqueue_struct *iscsi_eh_timer_workq; |
b5c7a12d | 55 | |
0896b752 AA |
56 | /* |
57 | * list of registered transports and lock that must | |
58 | * be held while accessing list. The iscsi_transport_lock must | |
0b950672 | 59 | * be acquired after the rx_queue_mutex. |
0896b752 AA |
60 | */ |
61 | static LIST_HEAD(iscsi_transports); | |
62 | static DEFINE_SPINLOCK(iscsi_transport_lock); | |
63 | ||
64 | #define to_iscsi_internal(tmpl) \ | |
65 | container_of(tmpl, struct iscsi_internal, t) | |
66 | ||
ee959b00 TJ |
67 | #define dev_to_iscsi_internal(_dev) \ |
68 | container_of(_dev, struct iscsi_internal, dev) | |
0896b752 | 69 | |
ee959b00 | 70 | static void iscsi_transport_release(struct device *dev) |
0896b752 | 71 | { |
ee959b00 | 72 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
0896b752 AA |
73 | kfree(priv); |
74 | } | |
1da177e4 | 75 | |
0896b752 AA |
76 | /* |
77 | * iscsi_transport_class represents the iscsi_transports that are | |
78 | * registered. | |
79 | */ | |
80 | static struct class iscsi_transport_class = { | |
81 | .name = "iscsi_transport", | |
ee959b00 | 82 | .dev_release = iscsi_transport_release, |
0896b752 AA |
83 | }; |
84 | ||
85 | static ssize_t | |
ee959b00 TJ |
86 | show_transport_handle(struct device *dev, struct device_attribute *attr, |
87 | char *buf) | |
0896b752 | 88 | { |
ee959b00 | 89 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
762e2bfa | 90 | return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); |
0896b752 | 91 | } |
ee959b00 | 92 | static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); |
0896b752 AA |
93 | |
94 | #define show_transport_attr(name, format) \ | |
95 | static ssize_t \ | |
ee959b00 TJ |
96 | show_transport_##name(struct device *dev, \ |
97 | struct device_attribute *attr,char *buf) \ | |
0896b752 | 98 | { \ |
ee959b00 | 99 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ |
0896b752 AA |
100 | return sprintf(buf, format"\n", priv->iscsi_transport->name); \ |
101 | } \ | |
ee959b00 | 102 | static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); |
0896b752 AA |
103 | |
104 | show_transport_attr(caps, "0x%x"); | |
0896b752 AA |
105 | |
106 | static struct attribute *iscsi_transport_attrs[] = { | |
ee959b00 TJ |
107 | &dev_attr_handle.attr, |
108 | &dev_attr_caps.attr, | |
0896b752 AA |
109 | NULL, |
110 | }; | |
111 | ||
112 | static struct attribute_group iscsi_transport_group = { | |
113 | .attrs = iscsi_transport_attrs, | |
114 | }; | |
115 | ||
d82ff9be MC |
116 | /* |
117 | * iSCSI endpoint attrs | |
118 | */ | |
119 | #define iscsi_dev_to_endpoint(_dev) \ | |
120 | container_of(_dev, struct iscsi_endpoint, dev) | |
121 | ||
122 | #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ | |
123 | struct device_attribute dev_attr_##_prefix##_##_name = \ | |
124 | __ATTR(_name,_mode,_show,_store) | |
125 | ||
126 | static void iscsi_endpoint_release(struct device *dev) | |
127 | { | |
128 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
129 | kfree(ep); | |
130 | } | |
131 | ||
132 | static struct class iscsi_endpoint_class = { | |
133 | .name = "iscsi_endpoint", | |
134 | .dev_release = iscsi_endpoint_release, | |
135 | }; | |
136 | ||
137 | static ssize_t | |
138 | show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) | |
139 | { | |
140 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
141 | return sprintf(buf, "%u\n", ep->id); | |
142 | } | |
143 | static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); | |
144 | ||
145 | static struct attribute *iscsi_endpoint_attrs[] = { | |
146 | &dev_attr_ep_handle.attr, | |
147 | NULL, | |
148 | }; | |
149 | ||
150 | static struct attribute_group iscsi_endpoint_group = { | |
151 | .attrs = iscsi_endpoint_attrs, | |
152 | }; | |
153 | ||
154 | #define ISCSI_MAX_EPID -1 | |
155 | ||
156 | static int iscsi_match_epid(struct device *dev, void *data) | |
157 | { | |
158 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
159 | unsigned int *epid = (unsigned int *) data; | |
160 | ||
161 | return *epid == ep->id; | |
162 | } | |
163 | ||
164 | struct iscsi_endpoint * | |
165 | iscsi_create_endpoint(int dd_size) | |
166 | { | |
167 | struct device *dev; | |
168 | struct iscsi_endpoint *ep; | |
169 | unsigned int id; | |
170 | int err; | |
171 | ||
172 | for (id = 1; id < ISCSI_MAX_EPID; id++) { | |
695794ae | 173 | dev = class_find_device(&iscsi_endpoint_class, NULL, &id, |
d82ff9be MC |
174 | iscsi_match_epid); |
175 | if (!dev) | |
176 | break; | |
177 | } | |
178 | if (id == ISCSI_MAX_EPID) { | |
179 | printk(KERN_ERR "Too many connections. Max supported %u\n", | |
180 | ISCSI_MAX_EPID - 1); | |
181 | return NULL; | |
182 | } | |
183 | ||
184 | ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); | |
185 | if (!ep) | |
186 | return NULL; | |
187 | ||
188 | ep->id = id; | |
189 | ep->dev.class = &iscsi_endpoint_class; | |
190 | snprintf(ep->dev.bus_id, BUS_ID_SIZE, "ep-%u", id); | |
191 | err = device_register(&ep->dev); | |
192 | if (err) | |
193 | goto free_ep; | |
194 | ||
195 | err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); | |
196 | if (err) | |
197 | goto unregister_dev; | |
198 | ||
199 | if (dd_size) | |
200 | ep->dd_data = &ep[1]; | |
201 | return ep; | |
202 | ||
203 | unregister_dev: | |
204 | device_unregister(&ep->dev); | |
205 | return NULL; | |
206 | ||
207 | free_ep: | |
208 | kfree(ep); | |
209 | return NULL; | |
210 | } | |
211 | EXPORT_SYMBOL_GPL(iscsi_create_endpoint); | |
212 | ||
213 | void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) | |
214 | { | |
215 | sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); | |
216 | device_unregister(&ep->dev); | |
217 | } | |
218 | EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); | |
219 | ||
220 | struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) | |
221 | { | |
f80f868e | 222 | struct iscsi_endpoint *ep; |
d82ff9be MC |
223 | struct device *dev; |
224 | ||
695794ae | 225 | dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, |
d82ff9be MC |
226 | iscsi_match_epid); |
227 | if (!dev) | |
228 | return NULL; | |
229 | ||
f80f868e MC |
230 | ep = iscsi_dev_to_endpoint(dev); |
231 | /* | |
232 | * we can drop this now because the interface will prevent | |
233 | * removals and lookups from racing. | |
234 | */ | |
235 | put_device(dev); | |
236 | return ep; | |
d82ff9be MC |
237 | } |
238 | EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); | |
239 | ||
30a6c652 | 240 | static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
ee959b00 | 241 | struct device *cdev) |
30a6c652 MC |
242 | { |
243 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 244 | struct iscsi_cls_host *ihost = shost->shost_data; |
30a6c652 MC |
245 | |
246 | memset(ihost, 0, sizeof(*ihost)); | |
8aae18ad | 247 | atomic_set(&ihost->nr_scans, 0); |
7970634b | 248 | mutex_init(&ihost->mutex); |
26974789 | 249 | |
aab0de24 KS |
250 | snprintf(ihost->scan_workq_name, sizeof(ihost->scan_workq_name), |
251 | "iscsi_scan_%d", shost->host_no); | |
bd976f62 MC |
252 | ihost->scan_workq = create_singlethread_workqueue( |
253 | ihost->scan_workq_name); | |
254 | if (!ihost->scan_workq) | |
26974789 MC |
255 | return -ENOMEM; |
256 | return 0; | |
257 | } | |
258 | ||
259 | static int iscsi_remove_host(struct transport_container *tc, struct device *dev, | |
ee959b00 | 260 | struct device *cdev) |
26974789 MC |
261 | { |
262 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 263 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 | 264 | |
bd976f62 | 265 | destroy_workqueue(ihost->scan_workq); |
30a6c652 MC |
266 | return 0; |
267 | } | |
268 | ||
269 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
270 | "iscsi_host", | |
271 | iscsi_setup_host, | |
26974789 | 272 | iscsi_remove_host, |
30a6c652 MC |
273 | NULL); |
274 | ||
0896b752 AA |
275 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
276 | "iscsi_session", | |
1da177e4 LT |
277 | NULL, |
278 | NULL, | |
279 | NULL); | |
280 | ||
0896b752 AA |
281 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
282 | "iscsi_connection", | |
1da177e4 LT |
283 | NULL, |
284 | NULL, | |
285 | NULL); | |
0896b752 AA |
286 | |
287 | static struct sock *nls; | |
0b950672 | 288 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 289 | |
7b7232f3 MC |
290 | static LIST_HEAD(sesslist); |
291 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
292 | static LIST_HEAD(connlist); |
293 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 294 | |
b5c7a12d MC |
295 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
296 | { | |
297 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
298 | return sess->sid; | |
299 | } | |
300 | ||
301 | /* | |
302 | * Returns the matching session to a given sid | |
303 | */ | |
304 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
305 | { |
306 | unsigned long flags; | |
307 | struct iscsi_cls_session *sess; | |
308 | ||
309 | spin_lock_irqsave(&sesslock, flags); | |
310 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 311 | if (sess->sid == sid) { |
7b7232f3 MC |
312 | spin_unlock_irqrestore(&sesslock, flags); |
313 | return sess; | |
314 | } | |
315 | } | |
316 | spin_unlock_irqrestore(&sesslock, flags); | |
317 | return NULL; | |
318 | } | |
319 | ||
b5c7a12d MC |
320 | /* |
321 | * Returns the matching connection to a given sid / cid tuple | |
322 | */ | |
323 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
324 | { |
325 | unsigned long flags; | |
326 | struct iscsi_cls_conn *conn; | |
327 | ||
328 | spin_lock_irqsave(&connlock, flags); | |
329 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 330 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
331 | spin_unlock_irqrestore(&connlock, flags); |
332 | return conn; | |
333 | } | |
334 | } | |
335 | spin_unlock_irqrestore(&connlock, flags); | |
336 | return NULL; | |
337 | } | |
338 | ||
7b8631b5 MC |
339 | /* |
340 | * The following functions can be used by LLDs that allocate | |
341 | * their own scsi_hosts or by software iscsi LLDs | |
342 | */ | |
6eabafbe MC |
343 | static struct { |
344 | int value; | |
345 | char *name; | |
346 | } iscsi_session_state_names[] = { | |
347 | { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, | |
348 | { ISCSI_SESSION_FAILED, "FAILED" }, | |
349 | { ISCSI_SESSION_FREE, "FREE" }, | |
350 | }; | |
351 | ||
3b0f208a | 352 | static const char *iscsi_session_state_name(int state) |
6eabafbe MC |
353 | { |
354 | int i; | |
355 | char *name = NULL; | |
356 | ||
357 | for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { | |
358 | if (iscsi_session_state_names[i].value == state) { | |
359 | name = iscsi_session_state_names[i].name; | |
360 | break; | |
361 | } | |
362 | } | |
363 | return name; | |
364 | } | |
365 | ||
366 | int iscsi_session_chkready(struct iscsi_cls_session *session) | |
367 | { | |
368 | unsigned long flags; | |
369 | int err; | |
370 | ||
371 | spin_lock_irqsave(&session->lock, flags); | |
372 | switch (session->state) { | |
373 | case ISCSI_SESSION_LOGGED_IN: | |
374 | err = 0; | |
375 | break; | |
376 | case ISCSI_SESSION_FAILED: | |
377 | err = DID_IMM_RETRY << 16; | |
378 | break; | |
379 | case ISCSI_SESSION_FREE: | |
380 | err = DID_NO_CONNECT << 16; | |
381 | break; | |
382 | default: | |
383 | err = DID_NO_CONNECT << 16; | |
384 | break; | |
385 | } | |
386 | spin_unlock_irqrestore(&session->lock, flags); | |
387 | return err; | |
388 | } | |
389 | EXPORT_SYMBOL_GPL(iscsi_session_chkready); | |
390 | ||
7b8631b5 MC |
391 | static void iscsi_session_release(struct device *dev) |
392 | { | |
393 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 394 | struct Scsi_Host *shost; |
0896b752 | 395 | |
7b8631b5 MC |
396 | shost = iscsi_session_to_shost(session); |
397 | scsi_host_put(shost); | |
398 | kfree(session); | |
7b8631b5 | 399 | } |
0896b752 | 400 | |
7b8631b5 MC |
401 | static int iscsi_is_session_dev(const struct device *dev) |
402 | { | |
403 | return dev->release == iscsi_session_release; | |
404 | } | |
0896b752 | 405 | |
a4804cd6 MC |
406 | static int iscsi_iter_session_fn(struct device *dev, void *data) |
407 | { | |
408 | void (* fn) (struct iscsi_cls_session *) = data; | |
409 | ||
410 | if (!iscsi_is_session_dev(dev)) | |
411 | return 0; | |
412 | fn(iscsi_dev_to_session(dev)); | |
413 | return 0; | |
414 | } | |
415 | ||
416 | void iscsi_host_for_each_session(struct Scsi_Host *shost, | |
417 | void (*fn)(struct iscsi_cls_session *)) | |
418 | { | |
419 | device_for_each_child(&shost->shost_gendev, fn, | |
420 | iscsi_iter_session_fn); | |
421 | } | |
422 | EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); | |
423 | ||
8aae18ad MC |
424 | /** |
425 | * iscsi_scan_finished - helper to report when running scans are done | |
426 | * @shost: scsi host | |
427 | * @time: scan run time | |
428 | * | |
429 | * This function can be used by drives like qla4xxx to report to the scsi | |
430 | * layer when the scans it kicked off at module load time are done. | |
431 | */ | |
432 | int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
433 | { | |
32c6e1b9 | 434 | struct iscsi_cls_host *ihost = shost->shost_data; |
8aae18ad MC |
435 | /* |
436 | * qla4xxx will have kicked off some session unblocks before calling | |
437 | * scsi_scan_host, so just wait for them to complete. | |
438 | */ | |
439 | return !atomic_read(&ihost->nr_scans); | |
440 | } | |
441 | EXPORT_SYMBOL_GPL(iscsi_scan_finished); | |
442 | ||
7970634b MC |
443 | struct iscsi_scan_data { |
444 | unsigned int channel; | |
445 | unsigned int id; | |
446 | unsigned int lun; | |
447 | }; | |
448 | ||
449 | static int iscsi_user_scan_session(struct device *dev, void *data) | |
30a6c652 | 450 | { |
7970634b | 451 | struct iscsi_scan_data *scan_data = data; |
30a6c652 | 452 | struct iscsi_cls_session *session; |
7970634b MC |
453 | struct Scsi_Host *shost; |
454 | struct iscsi_cls_host *ihost; | |
455 | unsigned long flags; | |
456 | unsigned int id; | |
457 | ||
458 | if (!iscsi_is_session_dev(dev)) | |
459 | return 0; | |
460 | ||
461 | session = iscsi_dev_to_session(dev); | |
462 | shost = iscsi_session_to_shost(session); | |
463 | ihost = shost->shost_data; | |
30a6c652 MC |
464 | |
465 | mutex_lock(&ihost->mutex); | |
7970634b MC |
466 | spin_lock_irqsave(&session->lock, flags); |
467 | if (session->state != ISCSI_SESSION_LOGGED_IN) { | |
468 | spin_unlock_irqrestore(&session->lock, flags); | |
469 | mutex_unlock(&ihost->mutex); | |
470 | return 0; | |
30a6c652 | 471 | } |
7970634b MC |
472 | id = session->target_id; |
473 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 474 | |
7970634b MC |
475 | if (id != ISCSI_MAX_TARGET) { |
476 | if ((scan_data->channel == SCAN_WILD_CARD || | |
477 | scan_data->channel == 0) && | |
478 | (scan_data->id == SCAN_WILD_CARD || | |
479 | scan_data->id == id)) | |
480 | scsi_scan_target(&session->dev, 0, id, | |
481 | scan_data->lun, 1); | |
482 | } | |
483 | mutex_unlock(&ihost->mutex); | |
30a6c652 MC |
484 | return 0; |
485 | } | |
486 | ||
7970634b MC |
487 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
488 | uint id, uint lun) | |
489 | { | |
490 | struct iscsi_scan_data scan_data; | |
491 | ||
492 | scan_data.channel = channel; | |
493 | scan_data.id = id; | |
494 | scan_data.lun = lun; | |
495 | ||
496 | return device_for_each_child(&shost->shost_gendev, &scan_data, | |
497 | iscsi_user_scan_session); | |
498 | } | |
499 | ||
bd976f62 MC |
500 | static void iscsi_scan_session(struct work_struct *work) |
501 | { | |
502 | struct iscsi_cls_session *session = | |
503 | container_of(work, struct iscsi_cls_session, scan_work); | |
8aae18ad | 504 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 505 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 506 | struct iscsi_scan_data scan_data; |
bd976f62 | 507 | |
7970634b MC |
508 | scan_data.channel = 0; |
509 | scan_data.id = SCAN_WILD_CARD; | |
510 | scan_data.lun = SCAN_WILD_CARD; | |
bd976f62 | 511 | |
7970634b | 512 | iscsi_user_scan_session(&session->dev, &scan_data); |
8aae18ad | 513 | atomic_dec(&ihost->nr_scans); |
bd976f62 MC |
514 | } |
515 | ||
c4028958 | 516 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 517 | { |
c4028958 DH |
518 | struct iscsi_cls_session *session = |
519 | container_of(work, struct iscsi_cls_session, | |
520 | recovery_work.work); | |
6eabafbe | 521 | unsigned long flags; |
30a6c652 | 522 | |
322d739d MC |
523 | iscsi_cls_session_printk(KERN_INFO, session, |
524 | "session recovery timed out after %d secs\n", | |
525 | session->recovery_tmo); | |
30a6c652 | 526 | |
6eabafbe MC |
527 | spin_lock_irqsave(&session->lock, flags); |
528 | switch (session->state) { | |
529 | case ISCSI_SESSION_FAILED: | |
530 | session->state = ISCSI_SESSION_FREE; | |
531 | break; | |
532 | case ISCSI_SESSION_LOGGED_IN: | |
533 | case ISCSI_SESSION_FREE: | |
534 | /* we raced with the unblock's flush */ | |
535 | spin_unlock_irqrestore(&session->lock, flags); | |
536 | return; | |
537 | } | |
538 | spin_unlock_irqrestore(&session->lock, flags); | |
539 | ||
30a6c652 MC |
540 | if (session->transport->session_recovery_timedout) |
541 | session->transport->session_recovery_timedout(session); | |
542 | ||
543 | scsi_target_unblock(&session->dev); | |
544 | } | |
545 | ||
45ab33b6 | 546 | static void __iscsi_unblock_session(struct work_struct *work) |
6eabafbe | 547 | { |
45ab33b6 MC |
548 | struct iscsi_cls_session *session = |
549 | container_of(work, struct iscsi_cls_session, | |
550 | unblock_work); | |
bd976f62 | 551 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 552 | struct iscsi_cls_host *ihost = shost->shost_data; |
6eabafbe MC |
553 | unsigned long flags; |
554 | ||
45ab33b6 MC |
555 | /* |
556 | * The recovery and unblock work get run from the same workqueue, | |
557 | * so try to cancel it if it was going to run after this unblock. | |
558 | */ | |
559 | cancel_delayed_work(&session->recovery_work); | |
6eabafbe MC |
560 | spin_lock_irqsave(&session->lock, flags); |
561 | session->state = ISCSI_SESSION_LOGGED_IN; | |
562 | spin_unlock_irqrestore(&session->lock, flags); | |
45ab33b6 MC |
563 | /* start IO */ |
564 | scsi_target_unblock(&session->dev); | |
8aae18ad MC |
565 | /* |
566 | * Only do kernel scanning if the driver is properly hooked into | |
567 | * the async scanning code (drivers like iscsi_tcp do login and | |
568 | * scanning from userspace). | |
569 | */ | |
570 | if (shost->hostt->scan_finished) { | |
571 | if (queue_work(ihost->scan_workq, &session->scan_work)) | |
572 | atomic_inc(&ihost->nr_scans); | |
573 | } | |
6eabafbe | 574 | } |
45ab33b6 MC |
575 | |
576 | /** | |
577 | * iscsi_unblock_session - set a session as logged in and start IO. | |
578 | * @session: iscsi session | |
579 | * | |
580 | * Mark a session as ready to accept IO. | |
581 | */ | |
582 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
583 | { | |
584 | queue_work(iscsi_eh_timer_workq, &session->unblock_work); | |
585 | /* | |
586 | * make sure all the events have completed before tell the driver | |
587 | * it is safe | |
588 | */ | |
589 | flush_workqueue(iscsi_eh_timer_workq); | |
590 | } | |
30a6c652 MC |
591 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
592 | ||
45ab33b6 | 593 | static void __iscsi_block_session(struct work_struct *work) |
30a6c652 | 594 | { |
45ab33b6 MC |
595 | struct iscsi_cls_session *session = |
596 | container_of(work, struct iscsi_cls_session, | |
597 | block_work); | |
6eabafbe MC |
598 | unsigned long flags; |
599 | ||
600 | spin_lock_irqsave(&session->lock, flags); | |
601 | session->state = ISCSI_SESSION_FAILED; | |
602 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 603 | scsi_target_block(&session->dev); |
d8bf541e MC |
604 | queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work, |
605 | session->recovery_tmo * HZ); | |
30a6c652 | 606 | } |
45ab33b6 MC |
607 | |
608 | void iscsi_block_session(struct iscsi_cls_session *session) | |
609 | { | |
610 | queue_work(iscsi_eh_timer_workq, &session->block_work); | |
611 | } | |
30a6c652 MC |
612 | EXPORT_SYMBOL_GPL(iscsi_block_session); |
613 | ||
26974789 MC |
614 | static void __iscsi_unbind_session(struct work_struct *work) |
615 | { | |
616 | struct iscsi_cls_session *session = | |
617 | container_of(work, struct iscsi_cls_session, | |
618 | unbind_work); | |
619 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 620 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 621 | unsigned long flags; |
26974789 MC |
622 | |
623 | /* Prevent new scans and make sure scanning is not in progress */ | |
624 | mutex_lock(&ihost->mutex); | |
7970634b MC |
625 | spin_lock_irqsave(&session->lock, flags); |
626 | if (session->target_id == ISCSI_MAX_TARGET) { | |
627 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
628 | mutex_unlock(&ihost->mutex); |
629 | return; | |
630 | } | |
7970634b MC |
631 | session->target_id = ISCSI_MAX_TARGET; |
632 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
633 | mutex_unlock(&ihost->mutex); |
634 | ||
635 | scsi_remove_target(&session->dev); | |
636 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
637 | } | |
638 | ||
639 | static int iscsi_unbind_session(struct iscsi_cls_session *session) | |
640 | { | |
641 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 642 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 | 643 | |
bd976f62 | 644 | return queue_work(ihost->scan_workq, &session->unbind_work); |
26974789 MC |
645 | } |
646 | ||
7b8631b5 | 647 | struct iscsi_cls_session * |
5d91e209 MC |
648 | iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
649 | int dd_size) | |
7b8631b5 MC |
650 | { |
651 | struct iscsi_cls_session *session; | |
7b8631b5 | 652 | |
5d91e209 | 653 | session = kzalloc(sizeof(*session) + dd_size, |
b5c7a12d | 654 | GFP_KERNEL); |
7b8631b5 | 655 | if (!session) |
f53a88da MC |
656 | return NULL; |
657 | ||
7b8631b5 | 658 | session->transport = transport; |
30a6c652 | 659 | session->recovery_tmo = 120; |
6eabafbe | 660 | session->state = ISCSI_SESSION_FREE; |
c4028958 | 661 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 | 662 | INIT_LIST_HEAD(&session->sess_list); |
45ab33b6 MC |
663 | INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
664 | INIT_WORK(&session->block_work, __iscsi_block_session); | |
26974789 | 665 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
bd976f62 | 666 | INIT_WORK(&session->scan_work, iscsi_scan_session); |
6eabafbe | 667 | spin_lock_init(&session->lock); |
7b8631b5 | 668 | |
6a8a0d36 MC |
669 | /* this is released in the dev's release function */ |
670 | scsi_host_get(shost); | |
8434aa8b MC |
671 | session->dev.parent = &shost->shost_gendev; |
672 | session->dev.release = iscsi_session_release; | |
673 | device_initialize(&session->dev); | |
5d91e209 | 674 | if (dd_size) |
b5c7a12d | 675 | session->dd_data = &session[1]; |
8434aa8b MC |
676 | return session; |
677 | } | |
678 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
679 | ||
7970634b MC |
680 | static int iscsi_get_next_target_id(struct device *dev, void *data) |
681 | { | |
682 | struct iscsi_cls_session *session; | |
683 | unsigned long flags; | |
684 | int err = 0; | |
685 | ||
686 | if (!iscsi_is_session_dev(dev)) | |
687 | return 0; | |
688 | ||
689 | session = iscsi_dev_to_session(dev); | |
690 | spin_lock_irqsave(&session->lock, flags); | |
691 | if (*((unsigned int *) data) == session->target_id) | |
692 | err = -EEXIST; | |
693 | spin_unlock_irqrestore(&session->lock, flags); | |
694 | return err; | |
695 | } | |
696 | ||
6a8a0d36 | 697 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
698 | { |
699 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 700 | struct iscsi_cls_host *ihost; |
26974789 | 701 | unsigned long flags; |
7970634b | 702 | unsigned int id = target_id; |
8434aa8b | 703 | int err; |
b5c7a12d | 704 | |
30a6c652 | 705 | ihost = shost->shost_data; |
41be1444 | 706 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
7970634b MC |
707 | |
708 | if (id == ISCSI_MAX_TARGET) { | |
709 | for (id = 0; id < ISCSI_MAX_TARGET; id++) { | |
710 | err = device_for_each_child(&shost->shost_gendev, &id, | |
711 | iscsi_get_next_target_id); | |
712 | if (!err) | |
713 | break; | |
714 | } | |
715 | ||
716 | if (id == ISCSI_MAX_TARGET) { | |
717 | iscsi_cls_session_printk(KERN_ERR, session, | |
718 | "Too many iscsi targets. Max " | |
719 | "number of targets is %d.\n", | |
720 | ISCSI_MAX_TARGET - 1); | |
721 | goto release_host; | |
722 | } | |
723 | } | |
724 | session->target_id = id; | |
30a6c652 | 725 | |
b5c7a12d MC |
726 | snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", |
727 | session->sid); | |
8434aa8b | 728 | err = device_add(&session->dev); |
7b8631b5 | 729 | if (err) { |
322d739d MC |
730 | iscsi_cls_session_printk(KERN_ERR, session, |
731 | "could not register session's dev\n"); | |
8434aa8b | 732 | goto release_host; |
7b8631b5 MC |
733 | } |
734 | transport_register_device(&session->dev); | |
735 | ||
26974789 MC |
736 | spin_lock_irqsave(&sesslock, flags); |
737 | list_add(&session->sess_list, &sesslist); | |
738 | spin_unlock_irqrestore(&sesslock, flags); | |
739 | ||
26974789 | 740 | iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); |
8434aa8b | 741 | return 0; |
30a6c652 | 742 | |
8434aa8b MC |
743 | release_host: |
744 | scsi_host_put(shost); | |
745 | return err; | |
7b8631b5 | 746 | } |
8434aa8b | 747 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
748 | |
749 | /** | |
8434aa8b MC |
750 | * iscsi_create_session - create iscsi class session |
751 | * @shost: scsi host | |
752 | * @transport: iscsi transport | |
5d91e209 | 753 | * @dd_size: private driver data size |
eb44820c | 754 | * @target_id: which target |
7b8631b5 | 755 | * |
8434aa8b | 756 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 757 | */ |
8434aa8b | 758 | struct iscsi_cls_session * |
5d91e209 MC |
759 | iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
760 | int dd_size, unsigned int target_id) | |
8434aa8b MC |
761 | { |
762 | struct iscsi_cls_session *session; | |
763 | ||
5d91e209 | 764 | session = iscsi_alloc_session(shost, transport, dd_size); |
8434aa8b MC |
765 | if (!session) |
766 | return NULL; | |
767 | ||
6a8a0d36 | 768 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
769 | iscsi_free_session(session); |
770 | return NULL; | |
771 | } | |
772 | return session; | |
773 | } | |
774 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
775 | ||
26974789 MC |
776 | static void iscsi_conn_release(struct device *dev) |
777 | { | |
778 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
779 | struct device *parent = conn->dev.parent; | |
780 | ||
781 | kfree(conn); | |
782 | put_device(parent); | |
783 | } | |
784 | ||
785 | static int iscsi_is_conn_dev(const struct device *dev) | |
786 | { | |
787 | return dev->release == iscsi_conn_release; | |
788 | } | |
789 | ||
790 | static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) | |
791 | { | |
792 | if (!iscsi_is_conn_dev(dev)) | |
793 | return 0; | |
794 | return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); | |
795 | } | |
796 | ||
8434aa8b | 797 | void iscsi_remove_session(struct iscsi_cls_session *session) |
7b8631b5 | 798 | { |
30a6c652 | 799 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 800 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 MC |
801 | unsigned long flags; |
802 | int err; | |
803 | ||
804 | spin_lock_irqsave(&sesslock, flags); | |
805 | list_del(&session->sess_list); | |
806 | spin_unlock_irqrestore(&sesslock, flags); | |
30a6c652 | 807 | |
45ab33b6 MC |
808 | /* make sure there are no blocks/unblocks queued */ |
809 | flush_workqueue(iscsi_eh_timer_workq); | |
810 | /* make sure the timedout callout is not running */ | |
811 | if (!cancel_delayed_work(&session->recovery_work)) | |
812 | flush_workqueue(iscsi_eh_timer_workq); | |
26974789 MC |
813 | /* |
814 | * If we are blocked let commands flow again. The lld or iscsi | |
815 | * layer should set up the queuecommand to fail commands. | |
45ab33b6 MC |
816 | * We assume that LLD will not be calling block/unblock while |
817 | * removing the session. | |
26974789 | 818 | */ |
6eabafbe MC |
819 | spin_lock_irqsave(&session->lock, flags); |
820 | session->state = ISCSI_SESSION_FREE; | |
821 | spin_unlock_irqrestore(&session->lock, flags); | |
bd976f62 | 822 | |
45ab33b6 MC |
823 | scsi_target_unblock(&session->dev); |
824 | /* flush running scans then delete devices */ | |
bd976f62 | 825 | flush_workqueue(ihost->scan_workq); |
45ab33b6 | 826 | __iscsi_unbind_session(&session->unbind_work); |
30a6c652 | 827 | |
26974789 MC |
828 | /* hw iscsi may not have removed all connections from session */ |
829 | err = device_for_each_child(&session->dev, NULL, | |
830 | iscsi_iter_destroy_conn_fn); | |
831 | if (err) | |
322d739d MC |
832 | iscsi_cls_session_printk(KERN_ERR, session, |
833 | "Could not delete all connections " | |
834 | "for session. Error %d.\n", err); | |
8434aa8b | 835 | |
7b8631b5 | 836 | transport_unregister_device(&session->dev); |
8434aa8b MC |
837 | device_del(&session->dev); |
838 | } | |
839 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
840 | ||
841 | void iscsi_free_session(struct iscsi_cls_session *session) | |
842 | { | |
26974789 | 843 | iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
8434aa8b | 844 | put_device(&session->dev); |
7b8631b5 | 845 | } |
8434aa8b MC |
846 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
847 | ||
848 | /** | |
849 | * iscsi_destroy_session - destroy iscsi session | |
850 | * @session: iscsi_session | |
851 | * | |
852 | * Can be called by a LLD or iscsi_transport. There must not be | |
853 | * any running connections. | |
eb44820c | 854 | */ |
8434aa8b MC |
855 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
856 | { | |
857 | iscsi_remove_session(session); | |
858 | iscsi_free_session(session); | |
859 | return 0; | |
860 | } | |
7b8631b5 MC |
861 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
862 | ||
7b8631b5 MC |
863 | /** |
864 | * iscsi_create_conn - create iscsi class connection | |
865 | * @session: iscsi cls session | |
5d91e209 | 866 | * @dd_size: private driver data size |
7b8631b5 MC |
867 | * @cid: connection id |
868 | * | |
869 | * This can be called from a LLD or iscsi_transport. The connection | |
870 | * is child of the session so cid must be unique for all connections | |
871 | * on the session. | |
b5c7a12d MC |
872 | * |
873 | * Since we do not support MCS, cid will normally be zero. In some cases | |
874 | * for software iscsi we could be trying to preallocate a connection struct | |
875 | * in which case there could be two connection structs and cid would be | |
876 | * non-zero. | |
eb44820c | 877 | */ |
7b8631b5 | 878 | struct iscsi_cls_conn * |
5d91e209 | 879 | iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) |
7b8631b5 MC |
880 | { |
881 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 | 882 | struct iscsi_cls_conn *conn; |
26974789 | 883 | unsigned long flags; |
7b8631b5 MC |
884 | int err; |
885 | ||
5d91e209 | 886 | conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); |
7b8631b5 MC |
887 | if (!conn) |
888 | return NULL; | |
5d91e209 | 889 | if (dd_size) |
7b8631b5 MC |
890 | conn->dd_data = &conn[1]; |
891 | ||
892 | INIT_LIST_HEAD(&conn->conn_list); | |
893 | conn->transport = transport; | |
b5c7a12d | 894 | conn->cid = cid; |
7b8631b5 MC |
895 | |
896 | /* this is released in the dev's release function */ | |
897 | if (!get_device(&session->dev)) | |
43a145a3 | 898 | goto free_conn; |
b5c7a12d | 899 | |
7b8631b5 | 900 | snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u", |
b5c7a12d | 901 | session->sid, cid); |
7b8631b5 MC |
902 | conn->dev.parent = &session->dev; |
903 | conn->dev.release = iscsi_conn_release; | |
904 | err = device_register(&conn->dev); | |
905 | if (err) { | |
322d739d MC |
906 | iscsi_cls_session_printk(KERN_ERR, session, "could not " |
907 | "register connection's dev\n"); | |
7b8631b5 MC |
908 | goto release_parent_ref; |
909 | } | |
910 | transport_register_device(&conn->dev); | |
26974789 MC |
911 | |
912 | spin_lock_irqsave(&connlock, flags); | |
913 | list_add(&conn->conn_list, &connlist); | |
914 | conn->active = 1; | |
915 | spin_unlock_irqrestore(&connlock, flags); | |
7b8631b5 MC |
916 | return conn; |
917 | ||
918 | release_parent_ref: | |
919 | put_device(&session->dev); | |
920 | free_conn: | |
921 | kfree(conn); | |
922 | return NULL; | |
923 | } | |
924 | ||
925 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
926 | ||
927 | /** | |
928 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 929 | * @conn: iscsi cls session |
7b8631b5 | 930 | * |
26974789 | 931 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 932 | */ |
7b8631b5 MC |
933 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
934 | { | |
26974789 MC |
935 | unsigned long flags; |
936 | ||
937 | spin_lock_irqsave(&connlock, flags); | |
938 | conn->active = 0; | |
939 | list_del(&conn->conn_list); | |
940 | spin_unlock_irqrestore(&connlock, flags); | |
941 | ||
7b8631b5 MC |
942 | transport_unregister_device(&conn->dev); |
943 | device_unregister(&conn->dev); | |
944 | return 0; | |
945 | } | |
7b8631b5 MC |
946 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
947 | ||
7b8631b5 MC |
948 | /* |
949 | * iscsi interface functions | |
950 | */ | |
0896b752 AA |
951 | static struct iscsi_internal * |
952 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
953 | { | |
954 | struct iscsi_internal *priv; | |
955 | unsigned long flags; | |
956 | ||
957 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
958 | list_for_each_entry(priv, &iscsi_transports, list) { | |
959 | if (tt == priv->iscsi_transport) { | |
960 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
961 | return priv; | |
962 | } | |
963 | } | |
964 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
965 | return NULL; | |
966 | } | |
1da177e4 | 967 | |
53cb8a1f | 968 | static int |
43a145a3 | 969 | iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp) |
53cb8a1f | 970 | { |
53cb8a1f MC |
971 | int rc; |
972 | ||
9aaa2b46 | 973 | rc = netlink_broadcast(nls, skb, 0, 1, gfp); |
53cb8a1f | 974 | if (rc < 0) { |
53cb8a1f MC |
975 | printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc); |
976 | return rc; | |
977 | } | |
978 | ||
53cb8a1f MC |
979 | return 0; |
980 | } | |
981 | ||
0896b752 | 982 | static int |
43a145a3 | 983 | iscsi_unicast_skb(struct sk_buff *skb, int pid) |
0896b752 | 984 | { |
0896b752 | 985 | int rc; |
1da177e4 | 986 | |
790f39a2 | 987 | rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT); |
0896b752 | 988 | if (rc < 0) { |
0896b752 AA |
989 | printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc); |
990 | return rc; | |
991 | } | |
992 | ||
0896b752 | 993 | return 0; |
1da177e4 | 994 | } |
1da177e4 | 995 | |
7b7232f3 | 996 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 997 | char *data, uint32_t data_size) |
1da177e4 | 998 | { |
0896b752 AA |
999 | struct nlmsghdr *nlh; |
1000 | struct sk_buff *skb; | |
1001 | struct iscsi_uevent *ev; | |
0896b752 | 1002 | char *pdu; |
790f39a2 | 1003 | struct iscsi_internal *priv; |
0896b752 AA |
1004 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
1005 | data_size); | |
1006 | ||
790f39a2 MC |
1007 | priv = iscsi_if_transport_lookup(conn->transport); |
1008 | if (!priv) | |
1009 | return -EINVAL; | |
1010 | ||
43a145a3 | 1011 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1012 | if (!skb) { |
7b7232f3 | 1013 | iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED); |
322d739d MC |
1014 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
1015 | "control PDU: OOM\n"); | |
0896b752 AA |
1016 | return -ENOMEM; |
1017 | } | |
1da177e4 | 1018 | |
790f39a2 | 1019 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1020 | ev = NLMSG_DATA(nlh); |
1021 | memset(ev, 0, sizeof(*ev)); | |
1022 | ev->transport_handle = iscsi_handle(conn->transport); | |
1023 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
1024 | ev->r.recv_req.cid = conn->cid; |
1025 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
1026 | pdu = (char*)ev + sizeof(*ev); |
1027 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
1028 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 1029 | |
43a145a3 | 1030 | return iscsi_unicast_skb(skb, priv->daemon_pid); |
1da177e4 | 1031 | } |
0896b752 | 1032 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 1033 | |
7b7232f3 | 1034 | void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 1035 | { |
0896b752 AA |
1036 | struct nlmsghdr *nlh; |
1037 | struct sk_buff *skb; | |
1038 | struct iscsi_uevent *ev; | |
790f39a2 | 1039 | struct iscsi_internal *priv; |
0896b752 AA |
1040 | int len = NLMSG_SPACE(sizeof(*ev)); |
1041 | ||
790f39a2 MC |
1042 | priv = iscsi_if_transport_lookup(conn->transport); |
1043 | if (!priv) | |
1044 | return; | |
1045 | ||
43a145a3 | 1046 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1047 | if (!skb) { |
322d739d MC |
1048 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
1049 | "conn error (%d)\n", error); | |
0896b752 AA |
1050 | return; |
1051 | } | |
1052 | ||
790f39a2 | 1053 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1054 | ev = NLMSG_DATA(nlh); |
1055 | ev->transport_handle = iscsi_handle(conn->transport); | |
1056 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 1057 | ev->r.connerror.error = error; |
b5c7a12d MC |
1058 | ev->r.connerror.cid = conn->cid; |
1059 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 1060 | |
43a145a3 | 1061 | iscsi_broadcast_skb(skb, GFP_ATOMIC); |
1da177e4 | 1062 | |
322d739d MC |
1063 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
1064 | error); | |
0896b752 AA |
1065 | } |
1066 | EXPORT_SYMBOL_GPL(iscsi_conn_error); | |
1067 | ||
1068 | static int | |
1069 | iscsi_if_send_reply(int pid, int seq, int type, int done, int multi, | |
1070 | void *payload, int size) | |
1071 | { | |
1072 | struct sk_buff *skb; | |
1073 | struct nlmsghdr *nlh; | |
1074 | int len = NLMSG_SPACE(size); | |
1075 | int flags = multi ? NLM_F_MULTI : 0; | |
1076 | int t = done ? NLMSG_DONE : type; | |
1077 | ||
43a145a3 | 1078 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
1079 | if (!skb) { |
1080 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
1081 | return -ENOMEM; | |
1082 | } | |
0896b752 AA |
1083 | |
1084 | nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0); | |
1085 | nlh->nlmsg_flags = flags; | |
1086 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43a145a3 | 1087 | return iscsi_unicast_skb(skb, pid); |
1da177e4 | 1088 | } |
1da177e4 | 1089 | |
7b8631b5 | 1090 | static int |
5b940adf | 1091 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
1092 | { |
1093 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1094 | struct iscsi_stats *stats; | |
1095 | struct sk_buff *skbstat; | |
1096 | struct iscsi_cls_conn *conn; | |
1097 | struct nlmsghdr *nlhstat; | |
1098 | struct iscsi_uevent *evstat; | |
790f39a2 | 1099 | struct iscsi_internal *priv; |
7b8631b5 MC |
1100 | int len = NLMSG_SPACE(sizeof(*ev) + |
1101 | sizeof(struct iscsi_stats) + | |
1102 | sizeof(struct iscsi_stats_custom) * | |
1103 | ISCSI_STATS_CUSTOM_MAX); | |
1104 | int err = 0; | |
0896b752 | 1105 | |
790f39a2 MC |
1106 | priv = iscsi_if_transport_lookup(transport); |
1107 | if (!priv) | |
1108 | return -EINVAL; | |
1109 | ||
b5c7a12d | 1110 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
1111 | if (!conn) |
1112 | return -EEXIST; | |
0896b752 | 1113 | |
7b8631b5 MC |
1114 | do { |
1115 | int actual_size; | |
0896b752 | 1116 | |
43a145a3 | 1117 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 | 1118 | if (!skbstat) { |
322d739d MC |
1119 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
1120 | "deliver stats: OOM\n"); | |
7b8631b5 MC |
1121 | return -ENOMEM; |
1122 | } | |
1123 | ||
790f39a2 | 1124 | nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0, |
7b8631b5 MC |
1125 | (len - sizeof(*nlhstat)), 0); |
1126 | evstat = NLMSG_DATA(nlhstat); | |
1127 | memset(evstat, 0, sizeof(*evstat)); | |
1128 | evstat->transport_handle = iscsi_handle(conn->transport); | |
1129 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
1130 | evstat->u.get_stats.cid = |
1131 | ev->u.get_stats.cid; | |
1132 | evstat->u.get_stats.sid = | |
1133 | ev->u.get_stats.sid; | |
7b8631b5 MC |
1134 | stats = (struct iscsi_stats *) |
1135 | ((char*)evstat + sizeof(*evstat)); | |
1136 | memset(stats, 0, sizeof(*stats)); | |
1137 | ||
7b7232f3 | 1138 | transport->get_stats(conn, stats); |
7b8631b5 MC |
1139 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
1140 | sizeof(struct iscsi_stats) + | |
1141 | sizeof(struct iscsi_stats_custom) * | |
1142 | stats->custom_length); | |
1143 | actual_size -= sizeof(*nlhstat); | |
1144 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 1145 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
1146 | nlhstat->nlmsg_len = actual_size; |
1147 | ||
43a145a3 | 1148 | err = iscsi_unicast_skb(skbstat, priv->daemon_pid); |
7b8631b5 MC |
1149 | } while (err < 0 && err != -ECONNREFUSED); |
1150 | ||
1151 | return err; | |
0896b752 AA |
1152 | } |
1153 | ||
53cb8a1f | 1154 | /** |
26974789 MC |
1155 | * iscsi_session_event - send session destr. completion event |
1156 | * @session: iscsi class session | |
1157 | * @event: type of event | |
eb44820c | 1158 | */ |
26974789 MC |
1159 | int iscsi_session_event(struct iscsi_cls_session *session, |
1160 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
1161 | { |
1162 | struct iscsi_internal *priv; | |
53cb8a1f MC |
1163 | struct Scsi_Host *shost; |
1164 | struct iscsi_uevent *ev; | |
1165 | struct sk_buff *skb; | |
1166 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
1167 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
1168 | ||
26974789 | 1169 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
1170 | if (!priv) |
1171 | return -EINVAL; | |
53cb8a1f MC |
1172 | shost = iscsi_session_to_shost(session); |
1173 | ||
43a145a3 | 1174 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 1175 | if (!skb) { |
322d739d MC |
1176 | iscsi_cls_session_printk(KERN_ERR, session, |
1177 | "Cannot notify userspace of session " | |
1178 | "event %u\n", event); | |
53cb8a1f MC |
1179 | return -ENOMEM; |
1180 | } | |
1181 | ||
1182 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
1183 | ev = NLMSG_DATA(nlh); | |
26974789 | 1184 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 1185 | |
26974789 MC |
1186 | ev->type = event; |
1187 | switch (event) { | |
1188 | case ISCSI_KEVENT_DESTROY_SESSION: | |
1189 | ev->r.d_session.host_no = shost->host_no; | |
1190 | ev->r.d_session.sid = session->sid; | |
1191 | break; | |
1192 | case ISCSI_KEVENT_CREATE_SESSION: | |
1193 | ev->r.c_session_ret.host_no = shost->host_no; | |
1194 | ev->r.c_session_ret.sid = session->sid; | |
1195 | break; | |
1196 | case ISCSI_KEVENT_UNBIND_SESSION: | |
1197 | ev->r.unbind_session.host_no = shost->host_no; | |
1198 | ev->r.unbind_session.sid = session->sid; | |
1199 | break; | |
1200 | default: | |
322d739d MC |
1201 | iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
1202 | "%u.\n", event); | |
26974789 | 1203 | kfree_skb(skb); |
53cb8a1f | 1204 | return -EINVAL; |
53cb8a1f MC |
1205 | } |
1206 | ||
53cb8a1f MC |
1207 | /* |
1208 | * this will occur if the daemon is not up, so we just warn | |
1209 | * the user and when the daemon is restarted it will handle it | |
1210 | */ | |
43a145a3 | 1211 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
53cb8a1f | 1212 | if (rc < 0) |
322d739d MC |
1213 | iscsi_cls_session_printk(KERN_ERR, session, |
1214 | "Cannot notify userspace of session " | |
1215 | "event %u. Check iscsi daemon\n", | |
1216 | event); | |
53cb8a1f MC |
1217 | return rc; |
1218 | } | |
26974789 | 1219 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 1220 | |
0896b752 | 1221 | static int |
d82ff9be MC |
1222 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, |
1223 | struct iscsi_uevent *ev, uint32_t initial_cmdsn, | |
40753caa | 1224 | uint16_t cmds_max, uint16_t queue_depth) |
0896b752 AA |
1225 | { |
1226 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 1227 | struct iscsi_cls_session *session; |
d82ff9be | 1228 | uint32_t host_no; |
0896b752 | 1229 | |
d82ff9be | 1230 | session = transport->create_session(ep, cmds_max, queue_depth, |
40753caa | 1231 | initial_cmdsn, &host_no); |
7b7232f3 | 1232 | if (!session) |
7b8631b5 | 1233 | return -ENOMEM; |
0896b752 | 1234 | |
40753caa | 1235 | ev->r.c_session_ret.host_no = host_no; |
b5c7a12d | 1236 | ev->r.c_session_ret.sid = session->sid; |
0896b752 | 1237 | return 0; |
0896b752 AA |
1238 | } |
1239 | ||
1240 | static int | |
7b7232f3 | 1241 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 1242 | { |
7b8631b5 | 1243 | struct iscsi_cls_conn *conn; |
7b7232f3 | 1244 | struct iscsi_cls_session *session; |
7b8631b5 | 1245 | |
b5c7a12d MC |
1246 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
1247 | if (!session) { | |
322d739d | 1248 | printk(KERN_ERR "iscsi: invalid session %d.\n", |
b5c7a12d | 1249 | ev->u.c_conn.sid); |
7b8631b5 | 1250 | return -EINVAL; |
b5c7a12d | 1251 | } |
0896b752 | 1252 | |
7b7232f3 | 1253 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d | 1254 | if (!conn) { |
322d739d MC |
1255 | iscsi_cls_session_printk(KERN_ERR, session, |
1256 | "couldn't create a new connection."); | |
7b7232f3 | 1257 | return -ENOMEM; |
b5c7a12d | 1258 | } |
0896b752 | 1259 | |
b5c7a12d MC |
1260 | ev->r.c_conn_ret.sid = session->sid; |
1261 | ev->r.c_conn_ret.cid = conn->cid; | |
0896b752 | 1262 | return 0; |
1da177e4 LT |
1263 | } |
1264 | ||
0896b752 AA |
1265 | static int |
1266 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1267 | { | |
7b8631b5 | 1268 | struct iscsi_cls_conn *conn; |
0896b752 | 1269 | |
b5c7a12d | 1270 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 1271 | if (!conn) |
7b8631b5 | 1272 | return -EINVAL; |
0896b752 | 1273 | |
7b8631b5 MC |
1274 | if (transport->destroy_conn) |
1275 | transport->destroy_conn(conn); | |
7b8631b5 | 1276 | return 0; |
0896b752 AA |
1277 | } |
1278 | ||
fd7255f5 MC |
1279 | static int |
1280 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1281 | { | |
1282 | char *data = (char*)ev + sizeof(*ev); | |
1283 | struct iscsi_cls_conn *conn; | |
1284 | struct iscsi_cls_session *session; | |
a54a52ca | 1285 | int err = 0, value = 0; |
fd7255f5 MC |
1286 | |
1287 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
1288 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
1289 | if (!conn || !session) | |
1290 | return -EINVAL; | |
1291 | ||
1292 | switch (ev->u.set_param.param) { | |
30a6c652 | 1293 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 1294 | sscanf(data, "%d", &value); |
30a6c652 MC |
1295 | if (value != 0) |
1296 | session->recovery_tmo = value; | |
1297 | break; | |
fd7255f5 | 1298 | default: |
a54a52ca MC |
1299 | err = transport->set_param(conn, ev->u.set_param.param, |
1300 | data, ev->u.set_param.len); | |
fd7255f5 MC |
1301 | } |
1302 | ||
1303 | return err; | |
1304 | } | |
1305 | ||
264faaaa OG |
1306 | static int |
1307 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
1308 | struct iscsi_uevent *ev, int msg_type) | |
1309 | { | |
d82ff9be | 1310 | struct iscsi_endpoint *ep; |
264faaaa OG |
1311 | struct sockaddr *dst_addr; |
1312 | int rc = 0; | |
1313 | ||
1314 | switch (msg_type) { | |
1315 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: | |
1316 | if (!transport->ep_connect) | |
1317 | return -EINVAL; | |
1318 | ||
1319 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
d82ff9be MC |
1320 | ep = transport->ep_connect(dst_addr, |
1321 | ev->u.ep_connect.non_blocking); | |
1322 | if (IS_ERR(ep)) | |
1323 | return PTR_ERR(ep); | |
1324 | ||
1325 | ev->r.ep_connect_ret.handle = ep->id; | |
264faaaa OG |
1326 | break; |
1327 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1328 | if (!transport->ep_poll) | |
1329 | return -EINVAL; | |
1330 | ||
d82ff9be MC |
1331 | ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); |
1332 | if (!ep) | |
1333 | return -EINVAL; | |
1334 | ||
1335 | ev->r.retcode = transport->ep_poll(ep, | |
264faaaa OG |
1336 | ev->u.ep_poll.timeout_ms); |
1337 | break; | |
1338 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1339 | if (!transport->ep_disconnect) | |
1340 | return -EINVAL; | |
1341 | ||
d82ff9be MC |
1342 | ep = iscsi_lookup_endpoint(ev->u.ep_disconnect.ep_handle); |
1343 | if (!ep) | |
1344 | return -EINVAL; | |
1345 | ||
1346 | transport->ep_disconnect(ep); | |
264faaaa OG |
1347 | break; |
1348 | } | |
1349 | return rc; | |
1350 | } | |
1351 | ||
01cb225d MC |
1352 | static int |
1353 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
1354 | struct iscsi_uevent *ev) | |
1355 | { | |
2174a04e | 1356 | struct Scsi_Host *shost; |
01cb225d | 1357 | struct sockaddr *dst_addr; |
2174a04e | 1358 | int err; |
01cb225d MC |
1359 | |
1360 | if (!transport->tgt_dscvr) | |
1361 | return -EINVAL; | |
1362 | ||
2174a04e MC |
1363 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
1364 | if (IS_ERR(shost)) { | |
1365 | printk(KERN_ERR "target discovery could not find host no %u\n", | |
1366 | ev->u.tgt_dscvr.host_no); | |
1367 | return -ENODEV; | |
1368 | } | |
1369 | ||
1370 | ||
01cb225d | 1371 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
1372 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
1373 | ev->u.tgt_dscvr.enable, dst_addr); | |
1374 | scsi_host_put(shost); | |
1375 | return err; | |
01cb225d MC |
1376 | } |
1377 | ||
1d9bf13a MC |
1378 | static int |
1379 | iscsi_set_host_param(struct iscsi_transport *transport, | |
1380 | struct iscsi_uevent *ev) | |
1381 | { | |
1382 | char *data = (char*)ev + sizeof(*ev); | |
1383 | struct Scsi_Host *shost; | |
1384 | int err; | |
1385 | ||
1386 | if (!transport->set_host_param) | |
1387 | return -ENOSYS; | |
1388 | ||
1389 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
1390 | if (IS_ERR(shost)) { | |
1391 | printk(KERN_ERR "set_host_param could not find host no %u\n", | |
1392 | ev->u.set_host_param.host_no); | |
1393 | return -ENODEV; | |
1394 | } | |
1395 | ||
1396 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1397 | data, ev->u.set_host_param.len); | |
1398 | scsi_host_put(shost); | |
1399 | return err; | |
1400 | } | |
1401 | ||
0896b752 AA |
1402 | static int |
1403 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) | |
1404 | { | |
1405 | int err = 0; | |
1406 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1407 | struct iscsi_transport *transport = NULL; | |
1408 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1409 | struct iscsi_cls_session *session; |
1410 | struct iscsi_cls_conn *conn; | |
d82ff9be | 1411 | struct iscsi_endpoint *ep = NULL; |
0896b752 | 1412 | |
0896b752 AA |
1413 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1414 | if (!priv) | |
1415 | return -EINVAL; | |
1416 | transport = priv->iscsi_transport; | |
1417 | ||
7b7232f3 MC |
1418 | if (!try_module_get(transport->owner)) |
1419 | return -EINVAL; | |
1420 | ||
790f39a2 MC |
1421 | priv->daemon_pid = NETLINK_CREDS(skb)->pid; |
1422 | ||
0896b752 AA |
1423 | switch (nlh->nlmsg_type) { |
1424 | case ISCSI_UEVENT_CREATE_SESSION: | |
d82ff9be | 1425 | err = iscsi_if_create_session(priv, ep, ev, |
40753caa MC |
1426 | ev->u.c_session.initial_cmdsn, |
1427 | ev->u.c_session.cmds_max, | |
1428 | ev->u.c_session.queue_depth); | |
1429 | break; | |
1430 | case ISCSI_UEVENT_CREATE_BOUND_SESSION: | |
d82ff9be | 1431 | ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); |
c95fddc7 MC |
1432 | if (!ep) { |
1433 | err = -EINVAL; | |
1434 | break; | |
1435 | } | |
d82ff9be MC |
1436 | |
1437 | err = iscsi_if_create_session(priv, ep, ev, | |
40753caa MC |
1438 | ev->u.c_bound_session.initial_cmdsn, |
1439 | ev->u.c_bound_session.cmds_max, | |
1440 | ev->u.c_bound_session.queue_depth); | |
0896b752 AA |
1441 | break; |
1442 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1443 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1444 | if (session) |
7b7232f3 | 1445 | transport->destroy_session(session); |
26974789 MC |
1446 | else |
1447 | err = -EINVAL; | |
1448 | break; | |
1449 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1450 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1451 | if (session) | |
1452 | iscsi_unbind_session(session); | |
1453 | else | |
7b7232f3 | 1454 | err = -EINVAL; |
0896b752 AA |
1455 | break; |
1456 | case ISCSI_UEVENT_CREATE_CONN: | |
1457 | err = iscsi_if_create_conn(transport, ev); | |
1458 | break; | |
1459 | case ISCSI_UEVENT_DESTROY_CONN: | |
1460 | err = iscsi_if_destroy_conn(transport, ev); | |
1461 | break; | |
1462 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1463 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1464 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 MC |
1465 | |
1466 | if (session && conn) | |
1467 | ev->r.retcode = transport->bind_conn(session, conn, | |
264faaaa | 1468 | ev->u.b_conn.transport_eph, |
7b7232f3 MC |
1469 | ev->u.b_conn.is_leading); |
1470 | else | |
1471 | err = -EINVAL; | |
0896b752 AA |
1472 | break; |
1473 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1474 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1475 | break; |
1476 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1477 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1478 | if (conn) |
1479 | ev->r.retcode = transport->start_conn(conn); | |
1480 | else | |
1481 | err = -EINVAL; | |
0896b752 AA |
1482 | break; |
1483 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1484 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1485 | if (conn) |
1486 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1487 | else | |
1488 | err = -EINVAL; | |
0896b752 AA |
1489 | break; |
1490 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1491 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1492 | if (conn) |
1493 | ev->r.retcode = transport->send_pdu(conn, | |
1494 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1495 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1496 | ev->u.send_pdu.data_size); | |
1497 | else | |
1498 | err = -EINVAL; | |
0896b752 AA |
1499 | break; |
1500 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1501 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1502 | break; |
264faaaa OG |
1503 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1504 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1505 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1506 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); | |
1507 | break; | |
01cb225d MC |
1508 | case ISCSI_UEVENT_TGT_DSCVR: |
1509 | err = iscsi_tgt_dscvr(transport, ev); | |
1510 | break; | |
1d9bf13a MC |
1511 | case ISCSI_UEVENT_SET_HOST_PARAM: |
1512 | err = iscsi_set_host_param(transport, ev); | |
1513 | break; | |
0896b752 | 1514 | default: |
1d9bf13a | 1515 | err = -ENOSYS; |
0896b752 AA |
1516 | break; |
1517 | } | |
1518 | ||
7b7232f3 | 1519 | module_put(transport->owner); |
0896b752 AA |
1520 | return err; |
1521 | } | |
1522 | ||
b5c7a12d | 1523 | /* |
cd40b7d3 DL |
1524 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
1525 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 1526 | */ |
0896b752 | 1527 | static void |
cd40b7d3 | 1528 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 1529 | { |
0b950672 | 1530 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
1531 | while (skb->len >= NLMSG_SPACE(0)) { |
1532 | int err; | |
1533 | uint32_t rlen; | |
1534 | struct nlmsghdr *nlh; | |
1535 | struct iscsi_uevent *ev; | |
1536 | ||
1537 | nlh = nlmsg_hdr(skb); | |
1538 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
1539 | skb->len < nlh->nlmsg_len) { | |
1540 | break; | |
ee7f8e40 | 1541 | } |
ee7f8e40 | 1542 | |
cd40b7d3 DL |
1543 | ev = NLMSG_DATA(nlh); |
1544 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1545 | if (rlen > skb->len) | |
1546 | rlen = skb->len; | |
0896b752 | 1547 | |
cd40b7d3 DL |
1548 | err = iscsi_if_recv_msg(skb, nlh); |
1549 | if (err) { | |
1550 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1551 | ev->iferror = err; | |
0896b752 | 1552 | } |
cd40b7d3 DL |
1553 | do { |
1554 | /* | |
1555 | * special case for GET_STATS: | |
1556 | * on success - sending reply and stats from | |
1557 | * inside of if_recv_msg(), | |
1558 | * on error - fall through. | |
1559 | */ | |
1560 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1561 | break; | |
1562 | err = iscsi_if_send_reply( | |
1563 | NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq, | |
1564 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); | |
1565 | } while (err < 0 && err != -ECONNREFUSED); | |
1566 | skb_pull(skb, rlen); | |
0896b752 | 1567 | } |
0b950672 | 1568 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1569 | } |
1da177e4 | 1570 | |
fd7255f5 | 1571 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
ee959b00 | 1572 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
fd7255f5 MC |
1573 | __ATTR(_name,_mode,_show,_store) |
1574 | ||
1da177e4 | 1575 | /* |
0896b752 | 1576 | * iSCSI connection attrs |
1da177e4 | 1577 | */ |
a54a52ca | 1578 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1579 | static ssize_t \ |
ee959b00 TJ |
1580 | show_conn_param_##param(struct device *dev, \ |
1581 | struct device_attribute *attr, char *buf) \ | |
0896b752 | 1582 | { \ |
ee959b00 | 1583 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ |
7b8631b5 | 1584 | struct iscsi_transport *t = conn->transport; \ |
a54a52ca | 1585 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1586 | } |
1587 | ||
a54a52ca MC |
1588 | #define iscsi_conn_attr(field, param) \ |
1589 | iscsi_conn_attr_show(param) \ | |
1590 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1591 | NULL); |
0896b752 | 1592 | |
a54a52ca MC |
1593 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1594 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1595 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1596 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1597 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1598 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1599 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
1600 | iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT); | |
1601 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); | |
1602 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
1603 | iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
f6d5180c MC |
1604 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
1605 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 LT |
1606 | |
1607 | /* | |
0896b752 | 1608 | * iSCSI session attrs |
1da177e4 | 1609 | */ |
b2c64167 | 1610 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 1611 | static ssize_t \ |
ee959b00 TJ |
1612 | show_session_param_##param(struct device *dev, \ |
1613 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1614 | { \ |
ee959b00 TJ |
1615 | struct iscsi_cls_session *session = \ |
1616 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 | 1617 | struct iscsi_transport *t = session->transport; \ |
b2c64167 MC |
1618 | \ |
1619 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
1620 | return -EACCES; \ | |
a54a52ca | 1621 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
1622 | } |
1623 | ||
b2c64167 MC |
1624 | #define iscsi_session_attr(field, param, perm) \ |
1625 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 1626 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 MC |
1627 | NULL); |
1628 | ||
b2c64167 MC |
1629 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
1630 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
1631 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
1632 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
1633 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
1634 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
1635 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
1636 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
1637 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
1638 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
1639 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
1640 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
1641 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
1642 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
1643 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
1644 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
1645 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
88dfd340 MC |
1646 | iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); |
1647 | iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0) | |
1da177e4 | 1648 | |
6eabafbe | 1649 | static ssize_t |
ee959b00 TJ |
1650 | show_priv_session_state(struct device *dev, struct device_attribute *attr, |
1651 | char *buf) | |
6eabafbe | 1652 | { |
ee959b00 | 1653 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); |
6eabafbe MC |
1654 | return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); |
1655 | } | |
1656 | static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, | |
1657 | NULL); | |
1658 | ||
fd7255f5 MC |
1659 | #define iscsi_priv_session_attr_show(field, format) \ |
1660 | static ssize_t \ | |
ee959b00 TJ |
1661 | show_priv_session_##field(struct device *dev, \ |
1662 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1663 | { \ |
ee959b00 TJ |
1664 | struct iscsi_cls_session *session = \ |
1665 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 MC |
1666 | return sprintf(buf, format"\n", session->field); \ |
1667 | } | |
1668 | ||
1669 | #define iscsi_priv_session_attr(field, format) \ | |
1670 | iscsi_priv_session_attr_show(field, format) \ | |
1671 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \ | |
1672 | NULL) | |
30a6c652 | 1673 | iscsi_priv_session_attr(recovery_tmo, "%d"); |
fd7255f5 | 1674 | |
1819dc81 MC |
1675 | /* |
1676 | * iSCSI host attrs | |
1677 | */ | |
1678 | #define iscsi_host_attr_show(param) \ | |
1679 | static ssize_t \ | |
ee959b00 TJ |
1680 | show_host_param_##param(struct device *dev, \ |
1681 | struct device_attribute *attr, char *buf) \ | |
1819dc81 | 1682 | { \ |
ee959b00 | 1683 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1819dc81 MC |
1684 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ |
1685 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
1686 | } | |
1687 | ||
1688 | #define iscsi_host_attr(field, param) \ | |
1689 | iscsi_host_attr_show(param) \ | |
1690 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
1691 | NULL); | |
1692 | ||
d8196ed2 | 1693 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 1694 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 1695 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 1696 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 1697 | |
fd7255f5 MC |
1698 | #define SETUP_PRIV_SESSION_RD_ATTR(field) \ |
1699 | do { \ | |
ee959b00 | 1700 | priv->session_attrs[count] = &dev_attr_priv_sess_##field; \ |
fd7255f5 MC |
1701 | count++; \ |
1702 | } while (0) | |
1703 | ||
a54a52ca | 1704 | |
fd7255f5 MC |
1705 | #define SETUP_SESSION_RD_ATTR(field, param_flag) \ |
1706 | do { \ | |
1707 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1708 | priv->session_attrs[count] = &dev_attr_sess_##field; \ |
1da177e4 | 1709 | count++; \ |
fd7255f5 MC |
1710 | } \ |
1711 | } while (0) | |
1712 | ||
fd7255f5 MC |
1713 | #define SETUP_CONN_RD_ATTR(field, param_flag) \ |
1714 | do { \ | |
1715 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1716 | priv->conn_attrs[count] = &dev_attr_conn_##field; \ |
fd7255f5 MC |
1717 | count++; \ |
1718 | } \ | |
1719 | } while (0) | |
1da177e4 | 1720 | |
1819dc81 MC |
1721 | #define SETUP_HOST_RD_ATTR(field, param_flag) \ |
1722 | do { \ | |
1723 | if (tt->host_param_mask & param_flag) { \ | |
ee959b00 | 1724 | priv->host_attrs[count] = &dev_attr_host_##field; \ |
1819dc81 MC |
1725 | count++; \ |
1726 | } \ | |
1727 | } while (0) | |
1728 | ||
0896b752 AA |
1729 | static int iscsi_session_match(struct attribute_container *cont, |
1730 | struct device *dev) | |
1da177e4 | 1731 | { |
7b8631b5 | 1732 | struct iscsi_cls_session *session; |
1da177e4 | 1733 | struct Scsi_Host *shost; |
0896b752 AA |
1734 | struct iscsi_internal *priv; |
1735 | ||
1736 | if (!iscsi_is_session_dev(dev)) | |
1737 | return 0; | |
1da177e4 | 1738 | |
7b8631b5 MC |
1739 | session = iscsi_dev_to_session(dev); |
1740 | shost = iscsi_session_to_shost(session); | |
0896b752 | 1741 | if (!shost->transportt) |
1da177e4 LT |
1742 | return 0; |
1743 | ||
0896b752 AA |
1744 | priv = to_iscsi_internal(shost->transportt); |
1745 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
1746 | return 0; |
1747 | ||
0896b752 | 1748 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
1749 | } |
1750 | ||
0896b752 AA |
1751 | static int iscsi_conn_match(struct attribute_container *cont, |
1752 | struct device *dev) | |
1753 | { | |
7b8631b5 MC |
1754 | struct iscsi_cls_session *session; |
1755 | struct iscsi_cls_conn *conn; | |
1da177e4 | 1756 | struct Scsi_Host *shost; |
0896b752 | 1757 | struct iscsi_internal *priv; |
1da177e4 | 1758 | |
0896b752 | 1759 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
1760 | return 0; |
1761 | ||
7b8631b5 MC |
1762 | conn = iscsi_dev_to_conn(dev); |
1763 | session = iscsi_dev_to_session(conn->dev.parent); | |
1764 | shost = iscsi_session_to_shost(session); | |
1765 | ||
0896b752 | 1766 | if (!shost->transportt) |
1da177e4 LT |
1767 | return 0; |
1768 | ||
0896b752 AA |
1769 | priv = to_iscsi_internal(shost->transportt); |
1770 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
1771 | return 0; | |
1da177e4 | 1772 | |
0896b752 AA |
1773 | return &priv->conn_cont.ac == cont; |
1774 | } | |
1775 | ||
30a6c652 MC |
1776 | static int iscsi_host_match(struct attribute_container *cont, |
1777 | struct device *dev) | |
1778 | { | |
1779 | struct Scsi_Host *shost; | |
1780 | struct iscsi_internal *priv; | |
1781 | ||
1782 | if (!scsi_is_host_device(dev)) | |
1783 | return 0; | |
1784 | ||
1785 | shost = dev_to_shost(dev); | |
1786 | if (!shost->transportt || | |
1787 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
1788 | return 0; | |
1789 | ||
1790 | priv = to_iscsi_internal(shost->transportt); | |
1791 | return &priv->t.host_attrs.ac == cont; | |
1792 | } | |
1793 | ||
7b8631b5 MC |
1794 | struct scsi_transport_template * |
1795 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
1796 | { |
1797 | struct iscsi_internal *priv; | |
1798 | unsigned long flags; | |
1799 | int count = 0, err; | |
1800 | ||
1801 | BUG_ON(!tt); | |
1802 | ||
1803 | priv = iscsi_if_transport_lookup(tt); | |
1804 | if (priv) | |
7b8631b5 | 1805 | return NULL; |
0896b752 | 1806 | |
24669f75 | 1807 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 1808 | if (!priv) |
7b8631b5 | 1809 | return NULL; |
0896b752 | 1810 | INIT_LIST_HEAD(&priv->list); |
53cb8a1f | 1811 | priv->daemon_pid = -1; |
0896b752 | 1812 | priv->iscsi_transport = tt; |
30a6c652 | 1813 | priv->t.user_scan = iscsi_user_scan; |
a4804cd6 MC |
1814 | if (!(tt->caps & CAP_DATA_PATH_OFFLOAD)) |
1815 | priv->t.create_work_queue = 1; | |
0896b752 | 1816 | |
ee959b00 TJ |
1817 | priv->dev.class = &iscsi_transport_class; |
1818 | snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name); | |
1819 | err = device_register(&priv->dev); | |
0896b752 AA |
1820 | if (err) |
1821 | goto free_priv; | |
1822 | ||
ee959b00 | 1823 | err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); |
0896b752 | 1824 | if (err) |
ee959b00 | 1825 | goto unregister_dev; |
0896b752 | 1826 | |
30a6c652 MC |
1827 | /* host parameters */ |
1828 | priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; | |
1829 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; | |
1830 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
32c6e1b9 | 1831 | priv->t.host_size = sizeof(struct iscsi_cls_host); |
30a6c652 MC |
1832 | transport_container_register(&priv->t.host_attrs); |
1833 | ||
d8196ed2 | 1834 | SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); |
22236961 | 1835 | SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS); |
1819dc81 | 1836 | SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS); |
8ad5781a | 1837 | SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME); |
1819dc81 MC |
1838 | BUG_ON(count > ISCSI_HOST_ATTRS); |
1839 | priv->host_attrs[count] = NULL; | |
1840 | count = 0; | |
1841 | ||
0896b752 AA |
1842 | /* connection parameters */ |
1843 | priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; | |
1844 | priv->conn_cont.ac.class = &iscsi_connection_class.class; | |
1845 | priv->conn_cont.ac.match = iscsi_conn_match; | |
1846 | transport_container_register(&priv->conn_cont); | |
1da177e4 | 1847 | |
fd7255f5 MC |
1848 | SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH); |
1849 | SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH); | |
1850 | SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN); | |
1851 | SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN); | |
1852 | SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN); | |
1853 | SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN); | |
1854 | SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS); | |
1855 | SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT); | |
8d2860b3 | 1856 | SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN); |
a54a52ca MC |
1857 | SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS); |
1858 | SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT); | |
f6d5180c MC |
1859 | SETUP_CONN_RD_ATTR(ping_tmo, ISCSI_PING_TMO); |
1860 | SETUP_CONN_RD_ATTR(recv_tmo, ISCSI_RECV_TMO); | |
0896b752 AA |
1861 | |
1862 | BUG_ON(count > ISCSI_CONN_ATTRS); | |
1863 | priv->conn_attrs[count] = NULL; | |
1da177e4 | 1864 | count = 0; |
1da177e4 | 1865 | |
0896b752 AA |
1866 | /* session parameters */ |
1867 | priv->session_cont.ac.attrs = &priv->session_attrs[0]; | |
1868 | priv->session_cont.ac.class = &iscsi_session_class.class; | |
1869 | priv->session_cont.ac.match = iscsi_session_match; | |
1870 | transport_container_register(&priv->session_cont); | |
1871 | ||
fd7255f5 MC |
1872 | SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN); |
1873 | SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T); | |
1874 | SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN); | |
1875 | SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST); | |
1876 | SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST); | |
1877 | SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN); | |
1878 | SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN); | |
1879 | SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL); | |
a54a52ca MC |
1880 | SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME); |
1881 | SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT); | |
b2c64167 MC |
1882 | SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME); |
1883 | SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN); | |
1884 | SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD); | |
1885 | SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN); | |
843c0a8a | 1886 | SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); |
4cd49ea1 MC |
1887 | SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO); |
1888 | SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO); | |
88dfd340 MC |
1889 | SETUP_SESSION_RD_ATTR(ifacename, ISCSI_IFACE_NAME); |
1890 | SETUP_SESSION_RD_ATTR(initiatorname, ISCSI_INITIATOR_NAME); | |
30a6c652 | 1891 | SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); |
6eabafbe | 1892 | SETUP_PRIV_SESSION_RD_ATTR(state); |
fd7255f5 | 1893 | |
0896b752 AA |
1894 | BUG_ON(count > ISCSI_SESSION_ATTRS); |
1895 | priv->session_attrs[count] = NULL; | |
1896 | ||
1897 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1898 | list_add(&priv->list, &iscsi_transports); | |
1899 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1900 | ||
1901 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 1902 | return &priv->t; |
1da177e4 | 1903 | |
ee959b00 TJ |
1904 | unregister_dev: |
1905 | device_unregister(&priv->dev); | |
d82ff9be | 1906 | return NULL; |
0896b752 AA |
1907 | free_priv: |
1908 | kfree(priv); | |
7b8631b5 | 1909 | return NULL; |
1da177e4 | 1910 | } |
0896b752 AA |
1911 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
1912 | ||
1913 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
1914 | { | |
1915 | struct iscsi_internal *priv; | |
1916 | unsigned long flags; | |
1917 | ||
1918 | BUG_ON(!tt); | |
1919 | ||
0b950672 | 1920 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
1921 | |
1922 | priv = iscsi_if_transport_lookup(tt); | |
1923 | BUG_ON (!priv); | |
1924 | ||
0896b752 AA |
1925 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
1926 | list_del(&priv->list); | |
1927 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1928 | ||
1929 | transport_container_unregister(&priv->conn_cont); | |
1930 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 1931 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 | 1932 | |
ee959b00 TJ |
1933 | sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); |
1934 | device_unregister(&priv->dev); | |
0b950672 | 1935 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 1936 | |
0896b752 AA |
1937 | return 0; |
1938 | } | |
1939 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 1940 | |
1da177e4 LT |
1941 | static __init int iscsi_transport_init(void) |
1942 | { | |
0896b752 | 1943 | int err; |
1da177e4 | 1944 | |
09492605 | 1945 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
1946 | ISCSI_TRANSPORT_VERSION); |
1947 | ||
41be1444 MC |
1948 | atomic_set(&iscsi_session_nr, 0); |
1949 | ||
0896b752 | 1950 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
1951 | if (err) |
1952 | return err; | |
0896b752 | 1953 | |
d82ff9be | 1954 | err = class_register(&iscsi_endpoint_class); |
0896b752 AA |
1955 | if (err) |
1956 | goto unregister_transport_class; | |
1957 | ||
d82ff9be MC |
1958 | err = transport_class_register(&iscsi_host_class); |
1959 | if (err) | |
1960 | goto unregister_endpoint_class; | |
1961 | ||
30a6c652 MC |
1962 | err = transport_class_register(&iscsi_connection_class); |
1963 | if (err) | |
1964 | goto unregister_host_class; | |
1965 | ||
0896b752 AA |
1966 | err = transport_class_register(&iscsi_session_class); |
1967 | if (err) | |
1968 | goto unregister_conn_class; | |
1969 | ||
d82ff9be MC |
1970 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, |
1971 | NULL, THIS_MODULE); | |
0896b752 AA |
1972 | if (!nls) { |
1973 | err = -ENOBUFS; | |
43a145a3 | 1974 | goto unregister_session_class; |
0896b752 AA |
1975 | } |
1976 | ||
d8bf541e MC |
1977 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
1978 | if (!iscsi_eh_timer_workq) | |
1979 | goto release_nls; | |
1980 | ||
43a145a3 | 1981 | return 0; |
0896b752 | 1982 | |
d8bf541e | 1983 | release_nls: |
b7c6ba6e | 1984 | netlink_kernel_release(nls); |
0896b752 AA |
1985 | unregister_session_class: |
1986 | transport_class_unregister(&iscsi_session_class); | |
1987 | unregister_conn_class: | |
1988 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
1989 | unregister_host_class: |
1990 | transport_class_unregister(&iscsi_host_class); | |
d82ff9be MC |
1991 | unregister_endpoint_class: |
1992 | class_unregister(&iscsi_endpoint_class); | |
0896b752 AA |
1993 | unregister_transport_class: |
1994 | class_unregister(&iscsi_transport_class); | |
1995 | return err; | |
1da177e4 LT |
1996 | } |
1997 | ||
1998 | static void __exit iscsi_transport_exit(void) | |
1999 | { | |
d8bf541e | 2000 | destroy_workqueue(iscsi_eh_timer_workq); |
b7c6ba6e | 2001 | netlink_kernel_release(nls); |
0896b752 AA |
2002 | transport_class_unregister(&iscsi_connection_class); |
2003 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 2004 | transport_class_unregister(&iscsi_host_class); |
d82ff9be | 2005 | class_unregister(&iscsi_endpoint_class); |
0896b752 | 2006 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
2007 | } |
2008 | ||
2009 | module_init(iscsi_transport_init); | |
2010 | module_exit(iscsi_transport_exit); | |
2011 | ||
0896b752 AA |
2012 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
2013 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
2014 | "Alex Aizman <itn780@yahoo.com>"); | |
2015 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 2016 | MODULE_LICENSE("GPL"); |
f4246b33 | 2017 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |