Commit | Line | Data |
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0896b752 | 1 | /* |
1da177e4 LT |
2 | * iSCSI transport class definitions |
3 | * | |
4 | * Copyright (C) IBM Corporation, 2004 | |
0896b752 AA |
5 | * Copyright (C) Mike Christie, 2004 - 2005 |
6 | * Copyright (C) Dmitry Yusupov, 2004 - 2005 | |
7 | * Copyright (C) Alex Aizman, 2004 - 2005 | |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | #include <linux/module.h> | |
0b950672 | 24 | #include <linux/mutex.h> |
0896b752 | 25 | #include <net/tcp.h> |
1da177e4 LT |
26 | #include <scsi/scsi.h> |
27 | #include <scsi/scsi_host.h> | |
28 | #include <scsi/scsi_device.h> | |
29 | #include <scsi/scsi_transport.h> | |
30 | #include <scsi/scsi_transport_iscsi.h> | |
0896b752 | 31 | #include <scsi/iscsi_if.h> |
1da177e4 | 32 | |
6eabafbe | 33 | #define ISCSI_SESSION_ATTRS 19 |
c238c3bb | 34 | #define ISCSI_CONN_ATTRS 13 |
d8196ed2 | 35 | #define ISCSI_HOST_ATTRS 4 |
d82ff9be | 36 | |
31ed0bf4 | 37 | #define ISCSI_TRANSPORT_VERSION "2.0-869" |
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++) { | |
173 | dev = class_find_device(&iscsi_endpoint_class, &id, | |
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 | { | |
222 | struct device *dev; | |
223 | ||
224 | dev = class_find_device(&iscsi_endpoint_class, &handle, | |
225 | iscsi_match_epid); | |
226 | if (!dev) | |
227 | return NULL; | |
228 | ||
229 | return iscsi_dev_to_endpoint(dev); | |
230 | } | |
231 | EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); | |
232 | ||
30a6c652 | 233 | static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
ee959b00 | 234 | struct device *cdev) |
30a6c652 MC |
235 | { |
236 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 237 | struct iscsi_cls_host *ihost = shost->shost_data; |
30a6c652 MC |
238 | |
239 | memset(ihost, 0, sizeof(*ihost)); | |
8aae18ad | 240 | atomic_set(&ihost->nr_scans, 0); |
7970634b | 241 | mutex_init(&ihost->mutex); |
26974789 | 242 | |
bd976f62 | 243 | snprintf(ihost->scan_workq_name, KOBJ_NAME_LEN, "iscsi_scan_%d", |
26974789 | 244 | shost->host_no); |
bd976f62 MC |
245 | ihost->scan_workq = create_singlethread_workqueue( |
246 | ihost->scan_workq_name); | |
247 | if (!ihost->scan_workq) | |
26974789 MC |
248 | return -ENOMEM; |
249 | return 0; | |
250 | } | |
251 | ||
252 | static int iscsi_remove_host(struct transport_container *tc, struct device *dev, | |
ee959b00 | 253 | struct device *cdev) |
26974789 MC |
254 | { |
255 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 256 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 | 257 | |
bd976f62 | 258 | destroy_workqueue(ihost->scan_workq); |
30a6c652 MC |
259 | return 0; |
260 | } | |
261 | ||
262 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
263 | "iscsi_host", | |
264 | iscsi_setup_host, | |
26974789 | 265 | iscsi_remove_host, |
30a6c652 MC |
266 | NULL); |
267 | ||
0896b752 AA |
268 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
269 | "iscsi_session", | |
1da177e4 LT |
270 | NULL, |
271 | NULL, | |
272 | NULL); | |
273 | ||
0896b752 AA |
274 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
275 | "iscsi_connection", | |
1da177e4 LT |
276 | NULL, |
277 | NULL, | |
278 | NULL); | |
0896b752 AA |
279 | |
280 | static struct sock *nls; | |
0b950672 | 281 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 282 | |
7b7232f3 MC |
283 | static LIST_HEAD(sesslist); |
284 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
285 | static LIST_HEAD(connlist); |
286 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 287 | |
b5c7a12d MC |
288 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
289 | { | |
290 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
291 | return sess->sid; | |
292 | } | |
293 | ||
294 | /* | |
295 | * Returns the matching session to a given sid | |
296 | */ | |
297 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
298 | { |
299 | unsigned long flags; | |
300 | struct iscsi_cls_session *sess; | |
301 | ||
302 | spin_lock_irqsave(&sesslock, flags); | |
303 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 304 | if (sess->sid == sid) { |
7b7232f3 MC |
305 | spin_unlock_irqrestore(&sesslock, flags); |
306 | return sess; | |
307 | } | |
308 | } | |
309 | spin_unlock_irqrestore(&sesslock, flags); | |
310 | return NULL; | |
311 | } | |
312 | ||
b5c7a12d MC |
313 | /* |
314 | * Returns the matching connection to a given sid / cid tuple | |
315 | */ | |
316 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
317 | { |
318 | unsigned long flags; | |
319 | struct iscsi_cls_conn *conn; | |
320 | ||
321 | spin_lock_irqsave(&connlock, flags); | |
322 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 323 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
324 | spin_unlock_irqrestore(&connlock, flags); |
325 | return conn; | |
326 | } | |
327 | } | |
328 | spin_unlock_irqrestore(&connlock, flags); | |
329 | return NULL; | |
330 | } | |
331 | ||
7b8631b5 MC |
332 | /* |
333 | * The following functions can be used by LLDs that allocate | |
334 | * their own scsi_hosts or by software iscsi LLDs | |
335 | */ | |
6eabafbe MC |
336 | static struct { |
337 | int value; | |
338 | char *name; | |
339 | } iscsi_session_state_names[] = { | |
340 | { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, | |
341 | { ISCSI_SESSION_FAILED, "FAILED" }, | |
342 | { ISCSI_SESSION_FREE, "FREE" }, | |
343 | }; | |
344 | ||
3b0f208a | 345 | static const char *iscsi_session_state_name(int state) |
6eabafbe MC |
346 | { |
347 | int i; | |
348 | char *name = NULL; | |
349 | ||
350 | for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { | |
351 | if (iscsi_session_state_names[i].value == state) { | |
352 | name = iscsi_session_state_names[i].name; | |
353 | break; | |
354 | } | |
355 | } | |
356 | return name; | |
357 | } | |
358 | ||
359 | int iscsi_session_chkready(struct iscsi_cls_session *session) | |
360 | { | |
361 | unsigned long flags; | |
362 | int err; | |
363 | ||
364 | spin_lock_irqsave(&session->lock, flags); | |
365 | switch (session->state) { | |
366 | case ISCSI_SESSION_LOGGED_IN: | |
367 | err = 0; | |
368 | break; | |
369 | case ISCSI_SESSION_FAILED: | |
370 | err = DID_IMM_RETRY << 16; | |
371 | break; | |
372 | case ISCSI_SESSION_FREE: | |
373 | err = DID_NO_CONNECT << 16; | |
374 | break; | |
375 | default: | |
376 | err = DID_NO_CONNECT << 16; | |
377 | break; | |
378 | } | |
379 | spin_unlock_irqrestore(&session->lock, flags); | |
380 | return err; | |
381 | } | |
382 | EXPORT_SYMBOL_GPL(iscsi_session_chkready); | |
383 | ||
7b8631b5 MC |
384 | static void iscsi_session_release(struct device *dev) |
385 | { | |
386 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 387 | struct Scsi_Host *shost; |
0896b752 | 388 | |
7b8631b5 MC |
389 | shost = iscsi_session_to_shost(session); |
390 | scsi_host_put(shost); | |
391 | kfree(session); | |
7b8631b5 | 392 | } |
0896b752 | 393 | |
7b8631b5 MC |
394 | static int iscsi_is_session_dev(const struct device *dev) |
395 | { | |
396 | return dev->release == iscsi_session_release; | |
397 | } | |
0896b752 | 398 | |
a4804cd6 MC |
399 | static int iscsi_iter_session_fn(struct device *dev, void *data) |
400 | { | |
401 | void (* fn) (struct iscsi_cls_session *) = data; | |
402 | ||
403 | if (!iscsi_is_session_dev(dev)) | |
404 | return 0; | |
405 | fn(iscsi_dev_to_session(dev)); | |
406 | return 0; | |
407 | } | |
408 | ||
409 | void iscsi_host_for_each_session(struct Scsi_Host *shost, | |
410 | void (*fn)(struct iscsi_cls_session *)) | |
411 | { | |
412 | device_for_each_child(&shost->shost_gendev, fn, | |
413 | iscsi_iter_session_fn); | |
414 | } | |
415 | EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); | |
416 | ||
8aae18ad MC |
417 | /** |
418 | * iscsi_scan_finished - helper to report when running scans are done | |
419 | * @shost: scsi host | |
420 | * @time: scan run time | |
421 | * | |
422 | * This function can be used by drives like qla4xxx to report to the scsi | |
423 | * layer when the scans it kicked off at module load time are done. | |
424 | */ | |
425 | int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
426 | { | |
32c6e1b9 | 427 | struct iscsi_cls_host *ihost = shost->shost_data; |
8aae18ad MC |
428 | /* |
429 | * qla4xxx will have kicked off some session unblocks before calling | |
430 | * scsi_scan_host, so just wait for them to complete. | |
431 | */ | |
432 | return !atomic_read(&ihost->nr_scans); | |
433 | } | |
434 | EXPORT_SYMBOL_GPL(iscsi_scan_finished); | |
435 | ||
7970634b MC |
436 | struct iscsi_scan_data { |
437 | unsigned int channel; | |
438 | unsigned int id; | |
439 | unsigned int lun; | |
440 | }; | |
441 | ||
442 | static int iscsi_user_scan_session(struct device *dev, void *data) | |
30a6c652 | 443 | { |
7970634b | 444 | struct iscsi_scan_data *scan_data = data; |
30a6c652 | 445 | struct iscsi_cls_session *session; |
7970634b MC |
446 | struct Scsi_Host *shost; |
447 | struct iscsi_cls_host *ihost; | |
448 | unsigned long flags; | |
449 | unsigned int id; | |
450 | ||
451 | if (!iscsi_is_session_dev(dev)) | |
452 | return 0; | |
453 | ||
454 | session = iscsi_dev_to_session(dev); | |
455 | shost = iscsi_session_to_shost(session); | |
456 | ihost = shost->shost_data; | |
30a6c652 MC |
457 | |
458 | mutex_lock(&ihost->mutex); | |
7970634b MC |
459 | spin_lock_irqsave(&session->lock, flags); |
460 | if (session->state != ISCSI_SESSION_LOGGED_IN) { | |
461 | spin_unlock_irqrestore(&session->lock, flags); | |
462 | mutex_unlock(&ihost->mutex); | |
463 | return 0; | |
30a6c652 | 464 | } |
7970634b MC |
465 | id = session->target_id; |
466 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 467 | |
7970634b MC |
468 | if (id != ISCSI_MAX_TARGET) { |
469 | if ((scan_data->channel == SCAN_WILD_CARD || | |
470 | scan_data->channel == 0) && | |
471 | (scan_data->id == SCAN_WILD_CARD || | |
472 | scan_data->id == id)) | |
473 | scsi_scan_target(&session->dev, 0, id, | |
474 | scan_data->lun, 1); | |
475 | } | |
476 | mutex_unlock(&ihost->mutex); | |
30a6c652 MC |
477 | return 0; |
478 | } | |
479 | ||
7970634b MC |
480 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
481 | uint id, uint lun) | |
482 | { | |
483 | struct iscsi_scan_data scan_data; | |
484 | ||
485 | scan_data.channel = channel; | |
486 | scan_data.id = id; | |
487 | scan_data.lun = lun; | |
488 | ||
489 | return device_for_each_child(&shost->shost_gendev, &scan_data, | |
490 | iscsi_user_scan_session); | |
491 | } | |
492 | ||
bd976f62 MC |
493 | static void iscsi_scan_session(struct work_struct *work) |
494 | { | |
495 | struct iscsi_cls_session *session = | |
496 | container_of(work, struct iscsi_cls_session, scan_work); | |
8aae18ad | 497 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 498 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 499 | struct iscsi_scan_data scan_data; |
bd976f62 | 500 | |
7970634b MC |
501 | scan_data.channel = 0; |
502 | scan_data.id = SCAN_WILD_CARD; | |
503 | scan_data.lun = SCAN_WILD_CARD; | |
bd976f62 | 504 | |
7970634b | 505 | iscsi_user_scan_session(&session->dev, &scan_data); |
8aae18ad | 506 | atomic_dec(&ihost->nr_scans); |
bd976f62 MC |
507 | } |
508 | ||
c4028958 | 509 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 510 | { |
c4028958 DH |
511 | struct iscsi_cls_session *session = |
512 | container_of(work, struct iscsi_cls_session, | |
513 | recovery_work.work); | |
6eabafbe | 514 | unsigned long flags; |
30a6c652 | 515 | |
322d739d MC |
516 | iscsi_cls_session_printk(KERN_INFO, session, |
517 | "session recovery timed out after %d secs\n", | |
518 | session->recovery_tmo); | |
30a6c652 | 519 | |
6eabafbe MC |
520 | spin_lock_irqsave(&session->lock, flags); |
521 | switch (session->state) { | |
522 | case ISCSI_SESSION_FAILED: | |
523 | session->state = ISCSI_SESSION_FREE; | |
524 | break; | |
525 | case ISCSI_SESSION_LOGGED_IN: | |
526 | case ISCSI_SESSION_FREE: | |
527 | /* we raced with the unblock's flush */ | |
528 | spin_unlock_irqrestore(&session->lock, flags); | |
529 | return; | |
530 | } | |
531 | spin_unlock_irqrestore(&session->lock, flags); | |
532 | ||
30a6c652 MC |
533 | if (session->transport->session_recovery_timedout) |
534 | session->transport->session_recovery_timedout(session); | |
535 | ||
536 | scsi_target_unblock(&session->dev); | |
537 | } | |
538 | ||
45ab33b6 | 539 | static void __iscsi_unblock_session(struct work_struct *work) |
6eabafbe | 540 | { |
45ab33b6 MC |
541 | struct iscsi_cls_session *session = |
542 | container_of(work, struct iscsi_cls_session, | |
543 | unblock_work); | |
bd976f62 | 544 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 545 | struct iscsi_cls_host *ihost = shost->shost_data; |
6eabafbe MC |
546 | unsigned long flags; |
547 | ||
45ab33b6 MC |
548 | /* |
549 | * The recovery and unblock work get run from the same workqueue, | |
550 | * so try to cancel it if it was going to run after this unblock. | |
551 | */ | |
552 | cancel_delayed_work(&session->recovery_work); | |
6eabafbe MC |
553 | spin_lock_irqsave(&session->lock, flags); |
554 | session->state = ISCSI_SESSION_LOGGED_IN; | |
555 | spin_unlock_irqrestore(&session->lock, flags); | |
45ab33b6 MC |
556 | /* start IO */ |
557 | scsi_target_unblock(&session->dev); | |
8aae18ad MC |
558 | /* |
559 | * Only do kernel scanning if the driver is properly hooked into | |
560 | * the async scanning code (drivers like iscsi_tcp do login and | |
561 | * scanning from userspace). | |
562 | */ | |
563 | if (shost->hostt->scan_finished) { | |
564 | if (queue_work(ihost->scan_workq, &session->scan_work)) | |
565 | atomic_inc(&ihost->nr_scans); | |
566 | } | |
6eabafbe | 567 | } |
45ab33b6 MC |
568 | |
569 | /** | |
570 | * iscsi_unblock_session - set a session as logged in and start IO. | |
571 | * @session: iscsi session | |
572 | * | |
573 | * Mark a session as ready to accept IO. | |
574 | */ | |
575 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
576 | { | |
577 | queue_work(iscsi_eh_timer_workq, &session->unblock_work); | |
578 | /* | |
579 | * make sure all the events have completed before tell the driver | |
580 | * it is safe | |
581 | */ | |
582 | flush_workqueue(iscsi_eh_timer_workq); | |
583 | } | |
30a6c652 MC |
584 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
585 | ||
45ab33b6 | 586 | static void __iscsi_block_session(struct work_struct *work) |
30a6c652 | 587 | { |
45ab33b6 MC |
588 | struct iscsi_cls_session *session = |
589 | container_of(work, struct iscsi_cls_session, | |
590 | block_work); | |
6eabafbe MC |
591 | unsigned long flags; |
592 | ||
593 | spin_lock_irqsave(&session->lock, flags); | |
594 | session->state = ISCSI_SESSION_FAILED; | |
595 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 596 | scsi_target_block(&session->dev); |
d8bf541e MC |
597 | queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work, |
598 | session->recovery_tmo * HZ); | |
30a6c652 | 599 | } |
45ab33b6 MC |
600 | |
601 | void iscsi_block_session(struct iscsi_cls_session *session) | |
602 | { | |
603 | queue_work(iscsi_eh_timer_workq, &session->block_work); | |
604 | } | |
30a6c652 MC |
605 | EXPORT_SYMBOL_GPL(iscsi_block_session); |
606 | ||
26974789 MC |
607 | static void __iscsi_unbind_session(struct work_struct *work) |
608 | { | |
609 | struct iscsi_cls_session *session = | |
610 | container_of(work, struct iscsi_cls_session, | |
611 | unbind_work); | |
612 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 613 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 614 | unsigned long flags; |
26974789 MC |
615 | |
616 | /* Prevent new scans and make sure scanning is not in progress */ | |
617 | mutex_lock(&ihost->mutex); | |
7970634b MC |
618 | spin_lock_irqsave(&session->lock, flags); |
619 | if (session->target_id == ISCSI_MAX_TARGET) { | |
620 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
621 | mutex_unlock(&ihost->mutex); |
622 | return; | |
623 | } | |
7970634b MC |
624 | session->target_id = ISCSI_MAX_TARGET; |
625 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
626 | mutex_unlock(&ihost->mutex); |
627 | ||
628 | scsi_remove_target(&session->dev); | |
629 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
630 | } | |
631 | ||
632 | static int iscsi_unbind_session(struct iscsi_cls_session *session) | |
633 | { | |
634 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 635 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 | 636 | |
bd976f62 | 637 | return queue_work(ihost->scan_workq, &session->unbind_work); |
26974789 MC |
638 | } |
639 | ||
7b8631b5 | 640 | struct iscsi_cls_session * |
5d91e209 MC |
641 | iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
642 | int dd_size) | |
7b8631b5 MC |
643 | { |
644 | struct iscsi_cls_session *session; | |
7b8631b5 | 645 | |
5d91e209 | 646 | session = kzalloc(sizeof(*session) + dd_size, |
b5c7a12d | 647 | GFP_KERNEL); |
7b8631b5 | 648 | if (!session) |
f53a88da MC |
649 | return NULL; |
650 | ||
7b8631b5 | 651 | session->transport = transport; |
30a6c652 | 652 | session->recovery_tmo = 120; |
6eabafbe | 653 | session->state = ISCSI_SESSION_FREE; |
c4028958 | 654 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 | 655 | INIT_LIST_HEAD(&session->sess_list); |
45ab33b6 MC |
656 | INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
657 | INIT_WORK(&session->block_work, __iscsi_block_session); | |
26974789 | 658 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
bd976f62 | 659 | INIT_WORK(&session->scan_work, iscsi_scan_session); |
6eabafbe | 660 | spin_lock_init(&session->lock); |
7b8631b5 | 661 | |
6a8a0d36 MC |
662 | /* this is released in the dev's release function */ |
663 | scsi_host_get(shost); | |
8434aa8b MC |
664 | session->dev.parent = &shost->shost_gendev; |
665 | session->dev.release = iscsi_session_release; | |
666 | device_initialize(&session->dev); | |
5d91e209 | 667 | if (dd_size) |
b5c7a12d | 668 | session->dd_data = &session[1]; |
8434aa8b MC |
669 | return session; |
670 | } | |
671 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
672 | ||
7970634b MC |
673 | static int iscsi_get_next_target_id(struct device *dev, void *data) |
674 | { | |
675 | struct iscsi_cls_session *session; | |
676 | unsigned long flags; | |
677 | int err = 0; | |
678 | ||
679 | if (!iscsi_is_session_dev(dev)) | |
680 | return 0; | |
681 | ||
682 | session = iscsi_dev_to_session(dev); | |
683 | spin_lock_irqsave(&session->lock, flags); | |
684 | if (*((unsigned int *) data) == session->target_id) | |
685 | err = -EEXIST; | |
686 | spin_unlock_irqrestore(&session->lock, flags); | |
687 | return err; | |
688 | } | |
689 | ||
6a8a0d36 | 690 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
691 | { |
692 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 693 | struct iscsi_cls_host *ihost; |
26974789 | 694 | unsigned long flags; |
7970634b | 695 | unsigned int id = target_id; |
8434aa8b | 696 | int err; |
b5c7a12d | 697 | |
30a6c652 | 698 | ihost = shost->shost_data; |
41be1444 | 699 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
7970634b MC |
700 | |
701 | if (id == ISCSI_MAX_TARGET) { | |
702 | for (id = 0; id < ISCSI_MAX_TARGET; id++) { | |
703 | err = device_for_each_child(&shost->shost_gendev, &id, | |
704 | iscsi_get_next_target_id); | |
705 | if (!err) | |
706 | break; | |
707 | } | |
708 | ||
709 | if (id == ISCSI_MAX_TARGET) { | |
710 | iscsi_cls_session_printk(KERN_ERR, session, | |
711 | "Too many iscsi targets. Max " | |
712 | "number of targets is %d.\n", | |
713 | ISCSI_MAX_TARGET - 1); | |
714 | goto release_host; | |
715 | } | |
716 | } | |
717 | session->target_id = id; | |
30a6c652 | 718 | |
b5c7a12d MC |
719 | snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", |
720 | session->sid); | |
8434aa8b | 721 | err = device_add(&session->dev); |
7b8631b5 | 722 | if (err) { |
322d739d MC |
723 | iscsi_cls_session_printk(KERN_ERR, session, |
724 | "could not register session's dev\n"); | |
8434aa8b | 725 | goto release_host; |
7b8631b5 MC |
726 | } |
727 | transport_register_device(&session->dev); | |
728 | ||
26974789 MC |
729 | spin_lock_irqsave(&sesslock, flags); |
730 | list_add(&session->sess_list, &sesslist); | |
731 | spin_unlock_irqrestore(&sesslock, flags); | |
732 | ||
26974789 | 733 | iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); |
8434aa8b | 734 | return 0; |
30a6c652 | 735 | |
8434aa8b MC |
736 | release_host: |
737 | scsi_host_put(shost); | |
738 | return err; | |
7b8631b5 | 739 | } |
8434aa8b | 740 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
741 | |
742 | /** | |
8434aa8b MC |
743 | * iscsi_create_session - create iscsi class session |
744 | * @shost: scsi host | |
745 | * @transport: iscsi transport | |
5d91e209 | 746 | * @dd_size: private driver data size |
eb44820c | 747 | * @target_id: which target |
7b8631b5 | 748 | * |
8434aa8b | 749 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 750 | */ |
8434aa8b | 751 | struct iscsi_cls_session * |
5d91e209 MC |
752 | iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
753 | int dd_size, unsigned int target_id) | |
8434aa8b MC |
754 | { |
755 | struct iscsi_cls_session *session; | |
756 | ||
5d91e209 | 757 | session = iscsi_alloc_session(shost, transport, dd_size); |
8434aa8b MC |
758 | if (!session) |
759 | return NULL; | |
760 | ||
6a8a0d36 | 761 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
762 | iscsi_free_session(session); |
763 | return NULL; | |
764 | } | |
765 | return session; | |
766 | } | |
767 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
768 | ||
26974789 MC |
769 | static void iscsi_conn_release(struct device *dev) |
770 | { | |
771 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
772 | struct device *parent = conn->dev.parent; | |
773 | ||
774 | kfree(conn); | |
775 | put_device(parent); | |
776 | } | |
777 | ||
778 | static int iscsi_is_conn_dev(const struct device *dev) | |
779 | { | |
780 | return dev->release == iscsi_conn_release; | |
781 | } | |
782 | ||
783 | static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) | |
784 | { | |
785 | if (!iscsi_is_conn_dev(dev)) | |
786 | return 0; | |
787 | return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); | |
788 | } | |
789 | ||
8434aa8b | 790 | void iscsi_remove_session(struct iscsi_cls_session *session) |
7b8631b5 | 791 | { |
30a6c652 | 792 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 793 | struct iscsi_cls_host *ihost = shost->shost_data; |
26974789 MC |
794 | unsigned long flags; |
795 | int err; | |
796 | ||
797 | spin_lock_irqsave(&sesslock, flags); | |
798 | list_del(&session->sess_list); | |
799 | spin_unlock_irqrestore(&sesslock, flags); | |
30a6c652 | 800 | |
45ab33b6 MC |
801 | /* make sure there are no blocks/unblocks queued */ |
802 | flush_workqueue(iscsi_eh_timer_workq); | |
803 | /* make sure the timedout callout is not running */ | |
804 | if (!cancel_delayed_work(&session->recovery_work)) | |
805 | flush_workqueue(iscsi_eh_timer_workq); | |
26974789 MC |
806 | /* |
807 | * If we are blocked let commands flow again. The lld or iscsi | |
808 | * layer should set up the queuecommand to fail commands. | |
45ab33b6 MC |
809 | * We assume that LLD will not be calling block/unblock while |
810 | * removing the session. | |
26974789 | 811 | */ |
6eabafbe MC |
812 | spin_lock_irqsave(&session->lock, flags); |
813 | session->state = ISCSI_SESSION_FREE; | |
814 | spin_unlock_irqrestore(&session->lock, flags); | |
bd976f62 | 815 | |
45ab33b6 MC |
816 | scsi_target_unblock(&session->dev); |
817 | /* flush running scans then delete devices */ | |
bd976f62 | 818 | flush_workqueue(ihost->scan_workq); |
45ab33b6 | 819 | __iscsi_unbind_session(&session->unbind_work); |
30a6c652 | 820 | |
26974789 MC |
821 | /* hw iscsi may not have removed all connections from session */ |
822 | err = device_for_each_child(&session->dev, NULL, | |
823 | iscsi_iter_destroy_conn_fn); | |
824 | if (err) | |
322d739d MC |
825 | iscsi_cls_session_printk(KERN_ERR, session, |
826 | "Could not delete all connections " | |
827 | "for session. Error %d.\n", err); | |
8434aa8b | 828 | |
7b8631b5 | 829 | transport_unregister_device(&session->dev); |
8434aa8b MC |
830 | device_del(&session->dev); |
831 | } | |
832 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
833 | ||
834 | void iscsi_free_session(struct iscsi_cls_session *session) | |
835 | { | |
26974789 | 836 | iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
8434aa8b | 837 | put_device(&session->dev); |
7b8631b5 | 838 | } |
8434aa8b MC |
839 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
840 | ||
841 | /** | |
842 | * iscsi_destroy_session - destroy iscsi session | |
843 | * @session: iscsi_session | |
844 | * | |
845 | * Can be called by a LLD or iscsi_transport. There must not be | |
846 | * any running connections. | |
eb44820c | 847 | */ |
8434aa8b MC |
848 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
849 | { | |
850 | iscsi_remove_session(session); | |
851 | iscsi_free_session(session); | |
852 | return 0; | |
853 | } | |
7b8631b5 MC |
854 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
855 | ||
7b8631b5 MC |
856 | /** |
857 | * iscsi_create_conn - create iscsi class connection | |
858 | * @session: iscsi cls session | |
5d91e209 | 859 | * @dd_size: private driver data size |
7b8631b5 MC |
860 | * @cid: connection id |
861 | * | |
862 | * This can be called from a LLD or iscsi_transport. The connection | |
863 | * is child of the session so cid must be unique for all connections | |
864 | * on the session. | |
b5c7a12d MC |
865 | * |
866 | * Since we do not support MCS, cid will normally be zero. In some cases | |
867 | * for software iscsi we could be trying to preallocate a connection struct | |
868 | * in which case there could be two connection structs and cid would be | |
869 | * non-zero. | |
eb44820c | 870 | */ |
7b8631b5 | 871 | struct iscsi_cls_conn * |
5d91e209 | 872 | iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) |
7b8631b5 MC |
873 | { |
874 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 | 875 | struct iscsi_cls_conn *conn; |
26974789 | 876 | unsigned long flags; |
7b8631b5 MC |
877 | int err; |
878 | ||
5d91e209 | 879 | conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); |
7b8631b5 MC |
880 | if (!conn) |
881 | return NULL; | |
5d91e209 | 882 | if (dd_size) |
7b8631b5 MC |
883 | conn->dd_data = &conn[1]; |
884 | ||
885 | INIT_LIST_HEAD(&conn->conn_list); | |
886 | conn->transport = transport; | |
b5c7a12d | 887 | conn->cid = cid; |
7b8631b5 MC |
888 | |
889 | /* this is released in the dev's release function */ | |
890 | if (!get_device(&session->dev)) | |
43a145a3 | 891 | goto free_conn; |
b5c7a12d | 892 | |
7b8631b5 | 893 | snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u", |
b5c7a12d | 894 | session->sid, cid); |
7b8631b5 MC |
895 | conn->dev.parent = &session->dev; |
896 | conn->dev.release = iscsi_conn_release; | |
897 | err = device_register(&conn->dev); | |
898 | if (err) { | |
322d739d MC |
899 | iscsi_cls_session_printk(KERN_ERR, session, "could not " |
900 | "register connection's dev\n"); | |
7b8631b5 MC |
901 | goto release_parent_ref; |
902 | } | |
903 | transport_register_device(&conn->dev); | |
26974789 MC |
904 | |
905 | spin_lock_irqsave(&connlock, flags); | |
906 | list_add(&conn->conn_list, &connlist); | |
907 | conn->active = 1; | |
908 | spin_unlock_irqrestore(&connlock, flags); | |
7b8631b5 MC |
909 | return conn; |
910 | ||
911 | release_parent_ref: | |
912 | put_device(&session->dev); | |
913 | free_conn: | |
914 | kfree(conn); | |
915 | return NULL; | |
916 | } | |
917 | ||
918 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
919 | ||
920 | /** | |
921 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 922 | * @conn: iscsi cls session |
7b8631b5 | 923 | * |
26974789 | 924 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 925 | */ |
7b8631b5 MC |
926 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
927 | { | |
26974789 MC |
928 | unsigned long flags; |
929 | ||
930 | spin_lock_irqsave(&connlock, flags); | |
931 | conn->active = 0; | |
932 | list_del(&conn->conn_list); | |
933 | spin_unlock_irqrestore(&connlock, flags); | |
934 | ||
7b8631b5 MC |
935 | transport_unregister_device(&conn->dev); |
936 | device_unregister(&conn->dev); | |
937 | return 0; | |
938 | } | |
7b8631b5 MC |
939 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
940 | ||
7b8631b5 MC |
941 | /* |
942 | * iscsi interface functions | |
943 | */ | |
0896b752 AA |
944 | static struct iscsi_internal * |
945 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
946 | { | |
947 | struct iscsi_internal *priv; | |
948 | unsigned long flags; | |
949 | ||
950 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
951 | list_for_each_entry(priv, &iscsi_transports, list) { | |
952 | if (tt == priv->iscsi_transport) { | |
953 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
954 | return priv; | |
955 | } | |
956 | } | |
957 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
958 | return NULL; | |
959 | } | |
1da177e4 | 960 | |
53cb8a1f | 961 | static int |
43a145a3 | 962 | iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp) |
53cb8a1f | 963 | { |
53cb8a1f MC |
964 | int rc; |
965 | ||
9aaa2b46 | 966 | rc = netlink_broadcast(nls, skb, 0, 1, gfp); |
53cb8a1f | 967 | if (rc < 0) { |
53cb8a1f MC |
968 | printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc); |
969 | return rc; | |
970 | } | |
971 | ||
53cb8a1f MC |
972 | return 0; |
973 | } | |
974 | ||
0896b752 | 975 | static int |
43a145a3 | 976 | iscsi_unicast_skb(struct sk_buff *skb, int pid) |
0896b752 | 977 | { |
0896b752 | 978 | int rc; |
1da177e4 | 979 | |
790f39a2 | 980 | rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT); |
0896b752 | 981 | if (rc < 0) { |
0896b752 AA |
982 | printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc); |
983 | return rc; | |
984 | } | |
985 | ||
0896b752 | 986 | return 0; |
1da177e4 | 987 | } |
1da177e4 | 988 | |
7b7232f3 | 989 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 990 | char *data, uint32_t data_size) |
1da177e4 | 991 | { |
0896b752 AA |
992 | struct nlmsghdr *nlh; |
993 | struct sk_buff *skb; | |
994 | struct iscsi_uevent *ev; | |
0896b752 | 995 | char *pdu; |
790f39a2 | 996 | struct iscsi_internal *priv; |
0896b752 AA |
997 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
998 | data_size); | |
999 | ||
790f39a2 MC |
1000 | priv = iscsi_if_transport_lookup(conn->transport); |
1001 | if (!priv) | |
1002 | return -EINVAL; | |
1003 | ||
43a145a3 | 1004 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1005 | if (!skb) { |
7b7232f3 | 1006 | iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED); |
322d739d MC |
1007 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
1008 | "control PDU: OOM\n"); | |
0896b752 AA |
1009 | return -ENOMEM; |
1010 | } | |
1da177e4 | 1011 | |
790f39a2 | 1012 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1013 | ev = NLMSG_DATA(nlh); |
1014 | memset(ev, 0, sizeof(*ev)); | |
1015 | ev->transport_handle = iscsi_handle(conn->transport); | |
1016 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
1017 | ev->r.recv_req.cid = conn->cid; |
1018 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
1019 | pdu = (char*)ev + sizeof(*ev); |
1020 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
1021 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 1022 | |
43a145a3 | 1023 | return iscsi_unicast_skb(skb, priv->daemon_pid); |
1da177e4 | 1024 | } |
0896b752 | 1025 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 1026 | |
7b7232f3 | 1027 | void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 1028 | { |
0896b752 AA |
1029 | struct nlmsghdr *nlh; |
1030 | struct sk_buff *skb; | |
1031 | struct iscsi_uevent *ev; | |
790f39a2 | 1032 | struct iscsi_internal *priv; |
0896b752 AA |
1033 | int len = NLMSG_SPACE(sizeof(*ev)); |
1034 | ||
790f39a2 MC |
1035 | priv = iscsi_if_transport_lookup(conn->transport); |
1036 | if (!priv) | |
1037 | return; | |
1038 | ||
43a145a3 | 1039 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1040 | if (!skb) { |
322d739d MC |
1041 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
1042 | "conn error (%d)\n", error); | |
0896b752 AA |
1043 | return; |
1044 | } | |
1045 | ||
790f39a2 | 1046 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1047 | ev = NLMSG_DATA(nlh); |
1048 | ev->transport_handle = iscsi_handle(conn->transport); | |
1049 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 1050 | ev->r.connerror.error = error; |
b5c7a12d MC |
1051 | ev->r.connerror.cid = conn->cid; |
1052 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 1053 | |
43a145a3 | 1054 | iscsi_broadcast_skb(skb, GFP_ATOMIC); |
1da177e4 | 1055 | |
322d739d MC |
1056 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
1057 | error); | |
0896b752 AA |
1058 | } |
1059 | EXPORT_SYMBOL_GPL(iscsi_conn_error); | |
1060 | ||
1061 | static int | |
1062 | iscsi_if_send_reply(int pid, int seq, int type, int done, int multi, | |
1063 | void *payload, int size) | |
1064 | { | |
1065 | struct sk_buff *skb; | |
1066 | struct nlmsghdr *nlh; | |
1067 | int len = NLMSG_SPACE(size); | |
1068 | int flags = multi ? NLM_F_MULTI : 0; | |
1069 | int t = done ? NLMSG_DONE : type; | |
1070 | ||
43a145a3 | 1071 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
1072 | if (!skb) { |
1073 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
1074 | return -ENOMEM; | |
1075 | } | |
0896b752 AA |
1076 | |
1077 | nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0); | |
1078 | nlh->nlmsg_flags = flags; | |
1079 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43a145a3 | 1080 | return iscsi_unicast_skb(skb, pid); |
1da177e4 | 1081 | } |
1da177e4 | 1082 | |
7b8631b5 | 1083 | static int |
5b940adf | 1084 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
1085 | { |
1086 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1087 | struct iscsi_stats *stats; | |
1088 | struct sk_buff *skbstat; | |
1089 | struct iscsi_cls_conn *conn; | |
1090 | struct nlmsghdr *nlhstat; | |
1091 | struct iscsi_uevent *evstat; | |
790f39a2 | 1092 | struct iscsi_internal *priv; |
7b8631b5 MC |
1093 | int len = NLMSG_SPACE(sizeof(*ev) + |
1094 | sizeof(struct iscsi_stats) + | |
1095 | sizeof(struct iscsi_stats_custom) * | |
1096 | ISCSI_STATS_CUSTOM_MAX); | |
1097 | int err = 0; | |
0896b752 | 1098 | |
790f39a2 MC |
1099 | priv = iscsi_if_transport_lookup(transport); |
1100 | if (!priv) | |
1101 | return -EINVAL; | |
1102 | ||
b5c7a12d | 1103 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
1104 | if (!conn) |
1105 | return -EEXIST; | |
0896b752 | 1106 | |
7b8631b5 MC |
1107 | do { |
1108 | int actual_size; | |
0896b752 | 1109 | |
43a145a3 | 1110 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 | 1111 | if (!skbstat) { |
322d739d MC |
1112 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
1113 | "deliver stats: OOM\n"); | |
7b8631b5 MC |
1114 | return -ENOMEM; |
1115 | } | |
1116 | ||
790f39a2 | 1117 | nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0, |
7b8631b5 MC |
1118 | (len - sizeof(*nlhstat)), 0); |
1119 | evstat = NLMSG_DATA(nlhstat); | |
1120 | memset(evstat, 0, sizeof(*evstat)); | |
1121 | evstat->transport_handle = iscsi_handle(conn->transport); | |
1122 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
1123 | evstat->u.get_stats.cid = |
1124 | ev->u.get_stats.cid; | |
1125 | evstat->u.get_stats.sid = | |
1126 | ev->u.get_stats.sid; | |
7b8631b5 MC |
1127 | stats = (struct iscsi_stats *) |
1128 | ((char*)evstat + sizeof(*evstat)); | |
1129 | memset(stats, 0, sizeof(*stats)); | |
1130 | ||
7b7232f3 | 1131 | transport->get_stats(conn, stats); |
7b8631b5 MC |
1132 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
1133 | sizeof(struct iscsi_stats) + | |
1134 | sizeof(struct iscsi_stats_custom) * | |
1135 | stats->custom_length); | |
1136 | actual_size -= sizeof(*nlhstat); | |
1137 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 1138 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
1139 | nlhstat->nlmsg_len = actual_size; |
1140 | ||
43a145a3 | 1141 | err = iscsi_unicast_skb(skbstat, priv->daemon_pid); |
7b8631b5 MC |
1142 | } while (err < 0 && err != -ECONNREFUSED); |
1143 | ||
1144 | return err; | |
0896b752 AA |
1145 | } |
1146 | ||
53cb8a1f | 1147 | /** |
26974789 MC |
1148 | * iscsi_session_event - send session destr. completion event |
1149 | * @session: iscsi class session | |
1150 | * @event: type of event | |
eb44820c | 1151 | */ |
26974789 MC |
1152 | int iscsi_session_event(struct iscsi_cls_session *session, |
1153 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
1154 | { |
1155 | struct iscsi_internal *priv; | |
53cb8a1f MC |
1156 | struct Scsi_Host *shost; |
1157 | struct iscsi_uevent *ev; | |
1158 | struct sk_buff *skb; | |
1159 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
1160 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
1161 | ||
26974789 | 1162 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
1163 | if (!priv) |
1164 | return -EINVAL; | |
53cb8a1f MC |
1165 | shost = iscsi_session_to_shost(session); |
1166 | ||
43a145a3 | 1167 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 1168 | if (!skb) { |
322d739d MC |
1169 | iscsi_cls_session_printk(KERN_ERR, session, |
1170 | "Cannot notify userspace of session " | |
1171 | "event %u\n", event); | |
53cb8a1f MC |
1172 | return -ENOMEM; |
1173 | } | |
1174 | ||
1175 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
1176 | ev = NLMSG_DATA(nlh); | |
26974789 | 1177 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 1178 | |
26974789 MC |
1179 | ev->type = event; |
1180 | switch (event) { | |
1181 | case ISCSI_KEVENT_DESTROY_SESSION: | |
1182 | ev->r.d_session.host_no = shost->host_no; | |
1183 | ev->r.d_session.sid = session->sid; | |
1184 | break; | |
1185 | case ISCSI_KEVENT_CREATE_SESSION: | |
1186 | ev->r.c_session_ret.host_no = shost->host_no; | |
1187 | ev->r.c_session_ret.sid = session->sid; | |
1188 | break; | |
1189 | case ISCSI_KEVENT_UNBIND_SESSION: | |
1190 | ev->r.unbind_session.host_no = shost->host_no; | |
1191 | ev->r.unbind_session.sid = session->sid; | |
1192 | break; | |
1193 | default: | |
322d739d MC |
1194 | iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
1195 | "%u.\n", event); | |
26974789 | 1196 | kfree_skb(skb); |
53cb8a1f | 1197 | return -EINVAL; |
53cb8a1f MC |
1198 | } |
1199 | ||
53cb8a1f MC |
1200 | /* |
1201 | * this will occur if the daemon is not up, so we just warn | |
1202 | * the user and when the daemon is restarted it will handle it | |
1203 | */ | |
43a145a3 | 1204 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
53cb8a1f | 1205 | if (rc < 0) |
322d739d MC |
1206 | iscsi_cls_session_printk(KERN_ERR, session, |
1207 | "Cannot notify userspace of session " | |
1208 | "event %u. Check iscsi daemon\n", | |
1209 | event); | |
53cb8a1f MC |
1210 | return rc; |
1211 | } | |
26974789 | 1212 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 1213 | |
0896b752 | 1214 | static int |
d82ff9be MC |
1215 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, |
1216 | struct iscsi_uevent *ev, uint32_t initial_cmdsn, | |
40753caa | 1217 | uint16_t cmds_max, uint16_t queue_depth) |
0896b752 AA |
1218 | { |
1219 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 1220 | struct iscsi_cls_session *session; |
d82ff9be | 1221 | uint32_t host_no; |
0896b752 | 1222 | |
d82ff9be | 1223 | session = transport->create_session(ep, cmds_max, queue_depth, |
40753caa | 1224 | initial_cmdsn, &host_no); |
7b7232f3 | 1225 | if (!session) |
7b8631b5 | 1226 | return -ENOMEM; |
0896b752 | 1227 | |
40753caa | 1228 | ev->r.c_session_ret.host_no = host_no; |
b5c7a12d | 1229 | ev->r.c_session_ret.sid = session->sid; |
0896b752 | 1230 | return 0; |
0896b752 AA |
1231 | } |
1232 | ||
1233 | static int | |
7b7232f3 | 1234 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 1235 | { |
7b8631b5 | 1236 | struct iscsi_cls_conn *conn; |
7b7232f3 | 1237 | struct iscsi_cls_session *session; |
7b8631b5 | 1238 | |
b5c7a12d MC |
1239 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
1240 | if (!session) { | |
322d739d | 1241 | printk(KERN_ERR "iscsi: invalid session %d.\n", |
b5c7a12d | 1242 | ev->u.c_conn.sid); |
7b8631b5 | 1243 | return -EINVAL; |
b5c7a12d | 1244 | } |
0896b752 | 1245 | |
7b7232f3 | 1246 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d | 1247 | if (!conn) { |
322d739d MC |
1248 | iscsi_cls_session_printk(KERN_ERR, session, |
1249 | "couldn't create a new connection."); | |
7b7232f3 | 1250 | return -ENOMEM; |
b5c7a12d | 1251 | } |
0896b752 | 1252 | |
b5c7a12d MC |
1253 | ev->r.c_conn_ret.sid = session->sid; |
1254 | ev->r.c_conn_ret.cid = conn->cid; | |
0896b752 | 1255 | return 0; |
1da177e4 LT |
1256 | } |
1257 | ||
0896b752 AA |
1258 | static int |
1259 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1260 | { | |
7b8631b5 | 1261 | struct iscsi_cls_conn *conn; |
0896b752 | 1262 | |
b5c7a12d | 1263 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 1264 | if (!conn) |
7b8631b5 | 1265 | return -EINVAL; |
0896b752 | 1266 | |
7b8631b5 MC |
1267 | if (transport->destroy_conn) |
1268 | transport->destroy_conn(conn); | |
7b8631b5 | 1269 | return 0; |
0896b752 AA |
1270 | } |
1271 | ||
fd7255f5 MC |
1272 | static int |
1273 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1274 | { | |
1275 | char *data = (char*)ev + sizeof(*ev); | |
1276 | struct iscsi_cls_conn *conn; | |
1277 | struct iscsi_cls_session *session; | |
a54a52ca | 1278 | int err = 0, value = 0; |
fd7255f5 MC |
1279 | |
1280 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
1281 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
1282 | if (!conn || !session) | |
1283 | return -EINVAL; | |
1284 | ||
1285 | switch (ev->u.set_param.param) { | |
30a6c652 | 1286 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 1287 | sscanf(data, "%d", &value); |
30a6c652 MC |
1288 | if (value != 0) |
1289 | session->recovery_tmo = value; | |
1290 | break; | |
fd7255f5 | 1291 | default: |
a54a52ca MC |
1292 | err = transport->set_param(conn, ev->u.set_param.param, |
1293 | data, ev->u.set_param.len); | |
fd7255f5 MC |
1294 | } |
1295 | ||
1296 | return err; | |
1297 | } | |
1298 | ||
264faaaa OG |
1299 | static int |
1300 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
1301 | struct iscsi_uevent *ev, int msg_type) | |
1302 | { | |
d82ff9be | 1303 | struct iscsi_endpoint *ep; |
264faaaa OG |
1304 | struct sockaddr *dst_addr; |
1305 | int rc = 0; | |
1306 | ||
1307 | switch (msg_type) { | |
1308 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: | |
1309 | if (!transport->ep_connect) | |
1310 | return -EINVAL; | |
1311 | ||
1312 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
d82ff9be MC |
1313 | ep = transport->ep_connect(dst_addr, |
1314 | ev->u.ep_connect.non_blocking); | |
1315 | if (IS_ERR(ep)) | |
1316 | return PTR_ERR(ep); | |
1317 | ||
1318 | ev->r.ep_connect_ret.handle = ep->id; | |
264faaaa OG |
1319 | break; |
1320 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1321 | if (!transport->ep_poll) | |
1322 | return -EINVAL; | |
1323 | ||
d82ff9be MC |
1324 | ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); |
1325 | if (!ep) | |
1326 | return -EINVAL; | |
1327 | ||
1328 | ev->r.retcode = transport->ep_poll(ep, | |
264faaaa OG |
1329 | ev->u.ep_poll.timeout_ms); |
1330 | break; | |
1331 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1332 | if (!transport->ep_disconnect) | |
1333 | return -EINVAL; | |
1334 | ||
d82ff9be MC |
1335 | ep = iscsi_lookup_endpoint(ev->u.ep_disconnect.ep_handle); |
1336 | if (!ep) | |
1337 | return -EINVAL; | |
1338 | ||
1339 | transport->ep_disconnect(ep); | |
264faaaa OG |
1340 | break; |
1341 | } | |
1342 | return rc; | |
1343 | } | |
1344 | ||
01cb225d MC |
1345 | static int |
1346 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
1347 | struct iscsi_uevent *ev) | |
1348 | { | |
2174a04e | 1349 | struct Scsi_Host *shost; |
01cb225d | 1350 | struct sockaddr *dst_addr; |
2174a04e | 1351 | int err; |
01cb225d MC |
1352 | |
1353 | if (!transport->tgt_dscvr) | |
1354 | return -EINVAL; | |
1355 | ||
2174a04e MC |
1356 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
1357 | if (IS_ERR(shost)) { | |
1358 | printk(KERN_ERR "target discovery could not find host no %u\n", | |
1359 | ev->u.tgt_dscvr.host_no); | |
1360 | return -ENODEV; | |
1361 | } | |
1362 | ||
1363 | ||
01cb225d | 1364 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
1365 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
1366 | ev->u.tgt_dscvr.enable, dst_addr); | |
1367 | scsi_host_put(shost); | |
1368 | return err; | |
01cb225d MC |
1369 | } |
1370 | ||
1d9bf13a MC |
1371 | static int |
1372 | iscsi_set_host_param(struct iscsi_transport *transport, | |
1373 | struct iscsi_uevent *ev) | |
1374 | { | |
1375 | char *data = (char*)ev + sizeof(*ev); | |
1376 | struct Scsi_Host *shost; | |
1377 | int err; | |
1378 | ||
1379 | if (!transport->set_host_param) | |
1380 | return -ENOSYS; | |
1381 | ||
1382 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
1383 | if (IS_ERR(shost)) { | |
1384 | printk(KERN_ERR "set_host_param could not find host no %u\n", | |
1385 | ev->u.set_host_param.host_no); | |
1386 | return -ENODEV; | |
1387 | } | |
1388 | ||
1389 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1390 | data, ev->u.set_host_param.len); | |
1391 | scsi_host_put(shost); | |
1392 | return err; | |
1393 | } | |
1394 | ||
0896b752 AA |
1395 | static int |
1396 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) | |
1397 | { | |
1398 | int err = 0; | |
1399 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1400 | struct iscsi_transport *transport = NULL; | |
1401 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1402 | struct iscsi_cls_session *session; |
1403 | struct iscsi_cls_conn *conn; | |
d82ff9be | 1404 | struct iscsi_endpoint *ep = NULL; |
0896b752 | 1405 | |
0896b752 AA |
1406 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1407 | if (!priv) | |
1408 | return -EINVAL; | |
1409 | transport = priv->iscsi_transport; | |
1410 | ||
7b7232f3 MC |
1411 | if (!try_module_get(transport->owner)) |
1412 | return -EINVAL; | |
1413 | ||
790f39a2 MC |
1414 | priv->daemon_pid = NETLINK_CREDS(skb)->pid; |
1415 | ||
0896b752 AA |
1416 | switch (nlh->nlmsg_type) { |
1417 | case ISCSI_UEVENT_CREATE_SESSION: | |
d82ff9be | 1418 | err = iscsi_if_create_session(priv, ep, ev, |
40753caa MC |
1419 | ev->u.c_session.initial_cmdsn, |
1420 | ev->u.c_session.cmds_max, | |
1421 | ev->u.c_session.queue_depth); | |
1422 | break; | |
1423 | case ISCSI_UEVENT_CREATE_BOUND_SESSION: | |
d82ff9be MC |
1424 | ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); |
1425 | if (!ep) | |
1426 | return -EINVAL; | |
1427 | ||
1428 | err = iscsi_if_create_session(priv, ep, ev, | |
40753caa MC |
1429 | ev->u.c_bound_session.initial_cmdsn, |
1430 | ev->u.c_bound_session.cmds_max, | |
1431 | ev->u.c_bound_session.queue_depth); | |
0896b752 AA |
1432 | break; |
1433 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1434 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1435 | if (session) |
7b7232f3 | 1436 | transport->destroy_session(session); |
26974789 MC |
1437 | else |
1438 | err = -EINVAL; | |
1439 | break; | |
1440 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1441 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1442 | if (session) | |
1443 | iscsi_unbind_session(session); | |
1444 | else | |
7b7232f3 | 1445 | err = -EINVAL; |
0896b752 AA |
1446 | break; |
1447 | case ISCSI_UEVENT_CREATE_CONN: | |
1448 | err = iscsi_if_create_conn(transport, ev); | |
1449 | break; | |
1450 | case ISCSI_UEVENT_DESTROY_CONN: | |
1451 | err = iscsi_if_destroy_conn(transport, ev); | |
1452 | break; | |
1453 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1454 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1455 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 MC |
1456 | |
1457 | if (session && conn) | |
1458 | ev->r.retcode = transport->bind_conn(session, conn, | |
264faaaa | 1459 | ev->u.b_conn.transport_eph, |
7b7232f3 MC |
1460 | ev->u.b_conn.is_leading); |
1461 | else | |
1462 | err = -EINVAL; | |
0896b752 AA |
1463 | break; |
1464 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1465 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1466 | break; |
1467 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1468 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1469 | if (conn) |
1470 | ev->r.retcode = transport->start_conn(conn); | |
1471 | else | |
1472 | err = -EINVAL; | |
0896b752 AA |
1473 | break; |
1474 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1475 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1476 | if (conn) |
1477 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1478 | else | |
1479 | err = -EINVAL; | |
0896b752 AA |
1480 | break; |
1481 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1482 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1483 | if (conn) |
1484 | ev->r.retcode = transport->send_pdu(conn, | |
1485 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1486 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1487 | ev->u.send_pdu.data_size); | |
1488 | else | |
1489 | err = -EINVAL; | |
0896b752 AA |
1490 | break; |
1491 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1492 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1493 | break; |
264faaaa OG |
1494 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1495 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1496 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1497 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); | |
1498 | break; | |
01cb225d MC |
1499 | case ISCSI_UEVENT_TGT_DSCVR: |
1500 | err = iscsi_tgt_dscvr(transport, ev); | |
1501 | break; | |
1d9bf13a MC |
1502 | case ISCSI_UEVENT_SET_HOST_PARAM: |
1503 | err = iscsi_set_host_param(transport, ev); | |
1504 | break; | |
0896b752 | 1505 | default: |
1d9bf13a | 1506 | err = -ENOSYS; |
0896b752 AA |
1507 | break; |
1508 | } | |
1509 | ||
7b7232f3 | 1510 | module_put(transport->owner); |
0896b752 AA |
1511 | return err; |
1512 | } | |
1513 | ||
b5c7a12d | 1514 | /* |
cd40b7d3 DL |
1515 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
1516 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 1517 | */ |
0896b752 | 1518 | static void |
cd40b7d3 | 1519 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 1520 | { |
0b950672 | 1521 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
1522 | while (skb->len >= NLMSG_SPACE(0)) { |
1523 | int err; | |
1524 | uint32_t rlen; | |
1525 | struct nlmsghdr *nlh; | |
1526 | struct iscsi_uevent *ev; | |
1527 | ||
1528 | nlh = nlmsg_hdr(skb); | |
1529 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
1530 | skb->len < nlh->nlmsg_len) { | |
1531 | break; | |
ee7f8e40 | 1532 | } |
ee7f8e40 | 1533 | |
cd40b7d3 DL |
1534 | ev = NLMSG_DATA(nlh); |
1535 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1536 | if (rlen > skb->len) | |
1537 | rlen = skb->len; | |
0896b752 | 1538 | |
cd40b7d3 DL |
1539 | err = iscsi_if_recv_msg(skb, nlh); |
1540 | if (err) { | |
1541 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1542 | ev->iferror = err; | |
0896b752 | 1543 | } |
cd40b7d3 DL |
1544 | do { |
1545 | /* | |
1546 | * special case for GET_STATS: | |
1547 | * on success - sending reply and stats from | |
1548 | * inside of if_recv_msg(), | |
1549 | * on error - fall through. | |
1550 | */ | |
1551 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1552 | break; | |
1553 | err = iscsi_if_send_reply( | |
1554 | NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq, | |
1555 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); | |
1556 | } while (err < 0 && err != -ECONNREFUSED); | |
1557 | skb_pull(skb, rlen); | |
0896b752 | 1558 | } |
0b950672 | 1559 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1560 | } |
1da177e4 | 1561 | |
fd7255f5 | 1562 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
ee959b00 | 1563 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
fd7255f5 MC |
1564 | __ATTR(_name,_mode,_show,_store) |
1565 | ||
1da177e4 | 1566 | /* |
0896b752 | 1567 | * iSCSI connection attrs |
1da177e4 | 1568 | */ |
a54a52ca | 1569 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1570 | static ssize_t \ |
ee959b00 TJ |
1571 | show_conn_param_##param(struct device *dev, \ |
1572 | struct device_attribute *attr, char *buf) \ | |
0896b752 | 1573 | { \ |
ee959b00 | 1574 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ |
7b8631b5 | 1575 | struct iscsi_transport *t = conn->transport; \ |
a54a52ca | 1576 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1577 | } |
1578 | ||
a54a52ca MC |
1579 | #define iscsi_conn_attr(field, param) \ |
1580 | iscsi_conn_attr_show(param) \ | |
1581 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1582 | NULL); |
0896b752 | 1583 | |
a54a52ca MC |
1584 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1585 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1586 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1587 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1588 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1589 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1590 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
1591 | iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT); | |
1592 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); | |
1593 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
1594 | iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
f6d5180c MC |
1595 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
1596 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 LT |
1597 | |
1598 | /* | |
0896b752 | 1599 | * iSCSI session attrs |
1da177e4 | 1600 | */ |
b2c64167 | 1601 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 1602 | static ssize_t \ |
ee959b00 TJ |
1603 | show_session_param_##param(struct device *dev, \ |
1604 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1605 | { \ |
ee959b00 TJ |
1606 | struct iscsi_cls_session *session = \ |
1607 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 | 1608 | struct iscsi_transport *t = session->transport; \ |
b2c64167 MC |
1609 | \ |
1610 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
1611 | return -EACCES; \ | |
a54a52ca | 1612 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
1613 | } |
1614 | ||
b2c64167 MC |
1615 | #define iscsi_session_attr(field, param, perm) \ |
1616 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 1617 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 MC |
1618 | NULL); |
1619 | ||
b2c64167 MC |
1620 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
1621 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
1622 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
1623 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
1624 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
1625 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
1626 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
1627 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
1628 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
1629 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
1630 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
1631 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
1632 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
1633 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
1634 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
1635 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
1636 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
1da177e4 | 1637 | |
6eabafbe | 1638 | static ssize_t |
ee959b00 TJ |
1639 | show_priv_session_state(struct device *dev, struct device_attribute *attr, |
1640 | char *buf) | |
6eabafbe | 1641 | { |
ee959b00 | 1642 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); |
6eabafbe MC |
1643 | return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); |
1644 | } | |
1645 | static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, | |
1646 | NULL); | |
1647 | ||
fd7255f5 MC |
1648 | #define iscsi_priv_session_attr_show(field, format) \ |
1649 | static ssize_t \ | |
ee959b00 TJ |
1650 | show_priv_session_##field(struct device *dev, \ |
1651 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1652 | { \ |
ee959b00 TJ |
1653 | struct iscsi_cls_session *session = \ |
1654 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 MC |
1655 | return sprintf(buf, format"\n", session->field); \ |
1656 | } | |
1657 | ||
1658 | #define iscsi_priv_session_attr(field, format) \ | |
1659 | iscsi_priv_session_attr_show(field, format) \ | |
1660 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \ | |
1661 | NULL) | |
30a6c652 | 1662 | iscsi_priv_session_attr(recovery_tmo, "%d"); |
fd7255f5 | 1663 | |
1819dc81 MC |
1664 | /* |
1665 | * iSCSI host attrs | |
1666 | */ | |
1667 | #define iscsi_host_attr_show(param) \ | |
1668 | static ssize_t \ | |
ee959b00 TJ |
1669 | show_host_param_##param(struct device *dev, \ |
1670 | struct device_attribute *attr, char *buf) \ | |
1819dc81 | 1671 | { \ |
ee959b00 | 1672 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1819dc81 MC |
1673 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ |
1674 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
1675 | } | |
1676 | ||
1677 | #define iscsi_host_attr(field, param) \ | |
1678 | iscsi_host_attr_show(param) \ | |
1679 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
1680 | NULL); | |
1681 | ||
d8196ed2 | 1682 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 1683 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 1684 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 1685 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 1686 | |
fd7255f5 MC |
1687 | #define SETUP_PRIV_SESSION_RD_ATTR(field) \ |
1688 | do { \ | |
ee959b00 | 1689 | priv->session_attrs[count] = &dev_attr_priv_sess_##field; \ |
fd7255f5 MC |
1690 | count++; \ |
1691 | } while (0) | |
1692 | ||
a54a52ca | 1693 | |
fd7255f5 MC |
1694 | #define SETUP_SESSION_RD_ATTR(field, param_flag) \ |
1695 | do { \ | |
1696 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1697 | priv->session_attrs[count] = &dev_attr_sess_##field; \ |
1da177e4 | 1698 | count++; \ |
fd7255f5 MC |
1699 | } \ |
1700 | } while (0) | |
1701 | ||
fd7255f5 MC |
1702 | #define SETUP_CONN_RD_ATTR(field, param_flag) \ |
1703 | do { \ | |
1704 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1705 | priv->conn_attrs[count] = &dev_attr_conn_##field; \ |
fd7255f5 MC |
1706 | count++; \ |
1707 | } \ | |
1708 | } while (0) | |
1da177e4 | 1709 | |
1819dc81 MC |
1710 | #define SETUP_HOST_RD_ATTR(field, param_flag) \ |
1711 | do { \ | |
1712 | if (tt->host_param_mask & param_flag) { \ | |
ee959b00 | 1713 | priv->host_attrs[count] = &dev_attr_host_##field; \ |
1819dc81 MC |
1714 | count++; \ |
1715 | } \ | |
1716 | } while (0) | |
1717 | ||
0896b752 AA |
1718 | static int iscsi_session_match(struct attribute_container *cont, |
1719 | struct device *dev) | |
1da177e4 | 1720 | { |
7b8631b5 | 1721 | struct iscsi_cls_session *session; |
1da177e4 | 1722 | struct Scsi_Host *shost; |
0896b752 AA |
1723 | struct iscsi_internal *priv; |
1724 | ||
1725 | if (!iscsi_is_session_dev(dev)) | |
1726 | return 0; | |
1da177e4 | 1727 | |
7b8631b5 MC |
1728 | session = iscsi_dev_to_session(dev); |
1729 | shost = iscsi_session_to_shost(session); | |
0896b752 | 1730 | if (!shost->transportt) |
1da177e4 LT |
1731 | return 0; |
1732 | ||
0896b752 AA |
1733 | priv = to_iscsi_internal(shost->transportt); |
1734 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
1735 | return 0; |
1736 | ||
0896b752 | 1737 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
1738 | } |
1739 | ||
0896b752 AA |
1740 | static int iscsi_conn_match(struct attribute_container *cont, |
1741 | struct device *dev) | |
1742 | { | |
7b8631b5 MC |
1743 | struct iscsi_cls_session *session; |
1744 | struct iscsi_cls_conn *conn; | |
1da177e4 | 1745 | struct Scsi_Host *shost; |
0896b752 | 1746 | struct iscsi_internal *priv; |
1da177e4 | 1747 | |
0896b752 | 1748 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
1749 | return 0; |
1750 | ||
7b8631b5 MC |
1751 | conn = iscsi_dev_to_conn(dev); |
1752 | session = iscsi_dev_to_session(conn->dev.parent); | |
1753 | shost = iscsi_session_to_shost(session); | |
1754 | ||
0896b752 | 1755 | if (!shost->transportt) |
1da177e4 LT |
1756 | return 0; |
1757 | ||
0896b752 AA |
1758 | priv = to_iscsi_internal(shost->transportt); |
1759 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
1760 | return 0; | |
1da177e4 | 1761 | |
0896b752 AA |
1762 | return &priv->conn_cont.ac == cont; |
1763 | } | |
1764 | ||
30a6c652 MC |
1765 | static int iscsi_host_match(struct attribute_container *cont, |
1766 | struct device *dev) | |
1767 | { | |
1768 | struct Scsi_Host *shost; | |
1769 | struct iscsi_internal *priv; | |
1770 | ||
1771 | if (!scsi_is_host_device(dev)) | |
1772 | return 0; | |
1773 | ||
1774 | shost = dev_to_shost(dev); | |
1775 | if (!shost->transportt || | |
1776 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
1777 | return 0; | |
1778 | ||
1779 | priv = to_iscsi_internal(shost->transportt); | |
1780 | return &priv->t.host_attrs.ac == cont; | |
1781 | } | |
1782 | ||
7b8631b5 MC |
1783 | struct scsi_transport_template * |
1784 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
1785 | { |
1786 | struct iscsi_internal *priv; | |
1787 | unsigned long flags; | |
1788 | int count = 0, err; | |
1789 | ||
1790 | BUG_ON(!tt); | |
1791 | ||
1792 | priv = iscsi_if_transport_lookup(tt); | |
1793 | if (priv) | |
7b8631b5 | 1794 | return NULL; |
0896b752 | 1795 | |
24669f75 | 1796 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 1797 | if (!priv) |
7b8631b5 | 1798 | return NULL; |
0896b752 | 1799 | INIT_LIST_HEAD(&priv->list); |
53cb8a1f | 1800 | priv->daemon_pid = -1; |
0896b752 | 1801 | priv->iscsi_transport = tt; |
30a6c652 | 1802 | priv->t.user_scan = iscsi_user_scan; |
a4804cd6 MC |
1803 | if (!(tt->caps & CAP_DATA_PATH_OFFLOAD)) |
1804 | priv->t.create_work_queue = 1; | |
0896b752 | 1805 | |
ee959b00 TJ |
1806 | priv->dev.class = &iscsi_transport_class; |
1807 | snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name); | |
1808 | err = device_register(&priv->dev); | |
0896b752 AA |
1809 | if (err) |
1810 | goto free_priv; | |
1811 | ||
ee959b00 | 1812 | err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); |
0896b752 | 1813 | if (err) |
ee959b00 | 1814 | goto unregister_dev; |
0896b752 | 1815 | |
30a6c652 MC |
1816 | /* host parameters */ |
1817 | priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; | |
1818 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; | |
1819 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
32c6e1b9 | 1820 | priv->t.host_size = sizeof(struct iscsi_cls_host); |
30a6c652 MC |
1821 | transport_container_register(&priv->t.host_attrs); |
1822 | ||
d8196ed2 | 1823 | SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); |
22236961 | 1824 | SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS); |
1819dc81 | 1825 | SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS); |
8ad5781a | 1826 | SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME); |
1819dc81 MC |
1827 | BUG_ON(count > ISCSI_HOST_ATTRS); |
1828 | priv->host_attrs[count] = NULL; | |
1829 | count = 0; | |
1830 | ||
0896b752 AA |
1831 | /* connection parameters */ |
1832 | priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; | |
1833 | priv->conn_cont.ac.class = &iscsi_connection_class.class; | |
1834 | priv->conn_cont.ac.match = iscsi_conn_match; | |
1835 | transport_container_register(&priv->conn_cont); | |
1da177e4 | 1836 | |
fd7255f5 MC |
1837 | SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH); |
1838 | SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH); | |
1839 | SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN); | |
1840 | SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN); | |
1841 | SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN); | |
1842 | SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN); | |
1843 | SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS); | |
1844 | SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT); | |
8d2860b3 | 1845 | SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN); |
a54a52ca MC |
1846 | SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS); |
1847 | SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT); | |
f6d5180c MC |
1848 | SETUP_CONN_RD_ATTR(ping_tmo, ISCSI_PING_TMO); |
1849 | SETUP_CONN_RD_ATTR(recv_tmo, ISCSI_RECV_TMO); | |
0896b752 AA |
1850 | |
1851 | BUG_ON(count > ISCSI_CONN_ATTRS); | |
1852 | priv->conn_attrs[count] = NULL; | |
1da177e4 | 1853 | count = 0; |
1da177e4 | 1854 | |
0896b752 AA |
1855 | /* session parameters */ |
1856 | priv->session_cont.ac.attrs = &priv->session_attrs[0]; | |
1857 | priv->session_cont.ac.class = &iscsi_session_class.class; | |
1858 | priv->session_cont.ac.match = iscsi_session_match; | |
1859 | transport_container_register(&priv->session_cont); | |
1860 | ||
fd7255f5 MC |
1861 | SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN); |
1862 | SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T); | |
1863 | SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN); | |
1864 | SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST); | |
1865 | SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST); | |
1866 | SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN); | |
1867 | SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN); | |
1868 | SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL); | |
a54a52ca MC |
1869 | SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME); |
1870 | SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT); | |
b2c64167 MC |
1871 | SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME); |
1872 | SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN); | |
1873 | SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD); | |
1874 | SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN); | |
843c0a8a | 1875 | SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); |
4cd49ea1 MC |
1876 | SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO); |
1877 | SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO); | |
30a6c652 | 1878 | SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); |
6eabafbe | 1879 | SETUP_PRIV_SESSION_RD_ATTR(state); |
fd7255f5 | 1880 | |
0896b752 AA |
1881 | BUG_ON(count > ISCSI_SESSION_ATTRS); |
1882 | priv->session_attrs[count] = NULL; | |
1883 | ||
1884 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1885 | list_add(&priv->list, &iscsi_transports); | |
1886 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1887 | ||
1888 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 1889 | return &priv->t; |
1da177e4 | 1890 | |
ee959b00 TJ |
1891 | unregister_dev: |
1892 | device_unregister(&priv->dev); | |
d82ff9be | 1893 | return NULL; |
0896b752 AA |
1894 | free_priv: |
1895 | kfree(priv); | |
7b8631b5 | 1896 | return NULL; |
1da177e4 | 1897 | } |
0896b752 AA |
1898 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
1899 | ||
1900 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
1901 | { | |
1902 | struct iscsi_internal *priv; | |
1903 | unsigned long flags; | |
1904 | ||
1905 | BUG_ON(!tt); | |
1906 | ||
0b950672 | 1907 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
1908 | |
1909 | priv = iscsi_if_transport_lookup(tt); | |
1910 | BUG_ON (!priv); | |
1911 | ||
0896b752 AA |
1912 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
1913 | list_del(&priv->list); | |
1914 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1915 | ||
1916 | transport_container_unregister(&priv->conn_cont); | |
1917 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 1918 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 | 1919 | |
ee959b00 TJ |
1920 | sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); |
1921 | device_unregister(&priv->dev); | |
0b950672 | 1922 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 1923 | |
0896b752 AA |
1924 | return 0; |
1925 | } | |
1926 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 1927 | |
1da177e4 LT |
1928 | static __init int iscsi_transport_init(void) |
1929 | { | |
0896b752 | 1930 | int err; |
1da177e4 | 1931 | |
09492605 | 1932 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
1933 | ISCSI_TRANSPORT_VERSION); |
1934 | ||
41be1444 MC |
1935 | atomic_set(&iscsi_session_nr, 0); |
1936 | ||
0896b752 | 1937 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
1938 | if (err) |
1939 | return err; | |
0896b752 | 1940 | |
d82ff9be | 1941 | err = class_register(&iscsi_endpoint_class); |
0896b752 AA |
1942 | if (err) |
1943 | goto unregister_transport_class; | |
1944 | ||
d82ff9be MC |
1945 | err = transport_class_register(&iscsi_host_class); |
1946 | if (err) | |
1947 | goto unregister_endpoint_class; | |
1948 | ||
30a6c652 MC |
1949 | err = transport_class_register(&iscsi_connection_class); |
1950 | if (err) | |
1951 | goto unregister_host_class; | |
1952 | ||
0896b752 AA |
1953 | err = transport_class_register(&iscsi_session_class); |
1954 | if (err) | |
1955 | goto unregister_conn_class; | |
1956 | ||
d82ff9be MC |
1957 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, |
1958 | NULL, THIS_MODULE); | |
0896b752 AA |
1959 | if (!nls) { |
1960 | err = -ENOBUFS; | |
43a145a3 | 1961 | goto unregister_session_class; |
0896b752 AA |
1962 | } |
1963 | ||
d8bf541e MC |
1964 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
1965 | if (!iscsi_eh_timer_workq) | |
1966 | goto release_nls; | |
1967 | ||
43a145a3 | 1968 | return 0; |
0896b752 | 1969 | |
d8bf541e | 1970 | release_nls: |
b7c6ba6e | 1971 | netlink_kernel_release(nls); |
0896b752 AA |
1972 | unregister_session_class: |
1973 | transport_class_unregister(&iscsi_session_class); | |
1974 | unregister_conn_class: | |
1975 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
1976 | unregister_host_class: |
1977 | transport_class_unregister(&iscsi_host_class); | |
d82ff9be MC |
1978 | unregister_endpoint_class: |
1979 | class_unregister(&iscsi_endpoint_class); | |
0896b752 AA |
1980 | unregister_transport_class: |
1981 | class_unregister(&iscsi_transport_class); | |
1982 | return err; | |
1da177e4 LT |
1983 | } |
1984 | ||
1985 | static void __exit iscsi_transport_exit(void) | |
1986 | { | |
d8bf541e | 1987 | destroy_workqueue(iscsi_eh_timer_workq); |
b7c6ba6e | 1988 | netlink_kernel_release(nls); |
0896b752 AA |
1989 | transport_class_unregister(&iscsi_connection_class); |
1990 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 1991 | transport_class_unregister(&iscsi_host_class); |
d82ff9be | 1992 | class_unregister(&iscsi_endpoint_class); |
0896b752 | 1993 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
1994 | } |
1995 | ||
1996 | module_init(iscsi_transport_init); | |
1997 | module_exit(iscsi_transport_exit); | |
1998 | ||
0896b752 AA |
1999 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
2000 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
2001 | "Alex Aizman <itn780@yahoo.com>"); | |
2002 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 2003 | MODULE_LICENSE("GPL"); |
f4246b33 | 2004 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |