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 | |
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); | |
21536062 | 141 | return sprintf(buf, "%llu\n", (unsigned long long) ep->id); |
d82ff9be MC |
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); | |
21536062 | 159 | uint64_t *epid = (uint64_t *) data; |
d82ff9be MC |
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; | |
21536062 | 169 | uint64_t id; |
d82ff9be MC |
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; | |
71610f55 | 190 | dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); |
d82ff9be MC |
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); |
30a6c652 MC |
249 | return 0; |
250 | } | |
251 | ||
252 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
253 | "iscsi_host", | |
254 | iscsi_setup_host, | |
06d25af4 | 255 | NULL, |
30a6c652 MC |
256 | NULL); |
257 | ||
0896b752 AA |
258 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
259 | "iscsi_session", | |
1da177e4 LT |
260 | NULL, |
261 | NULL, | |
262 | NULL); | |
263 | ||
0896b752 AA |
264 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
265 | "iscsi_connection", | |
1da177e4 LT |
266 | NULL, |
267 | NULL, | |
268 | NULL); | |
0896b752 AA |
269 | |
270 | static struct sock *nls; | |
0b950672 | 271 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 272 | |
7b7232f3 MC |
273 | static LIST_HEAD(sesslist); |
274 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
275 | static LIST_HEAD(connlist); |
276 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 277 | |
b5c7a12d MC |
278 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
279 | { | |
280 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
281 | return sess->sid; | |
282 | } | |
283 | ||
284 | /* | |
285 | * Returns the matching session to a given sid | |
286 | */ | |
287 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
288 | { |
289 | unsigned long flags; | |
290 | struct iscsi_cls_session *sess; | |
291 | ||
292 | spin_lock_irqsave(&sesslock, flags); | |
293 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 294 | if (sess->sid == sid) { |
7b7232f3 MC |
295 | spin_unlock_irqrestore(&sesslock, flags); |
296 | return sess; | |
297 | } | |
298 | } | |
299 | spin_unlock_irqrestore(&sesslock, flags); | |
300 | return NULL; | |
301 | } | |
302 | ||
b5c7a12d MC |
303 | /* |
304 | * Returns the matching connection to a given sid / cid tuple | |
305 | */ | |
306 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
307 | { |
308 | unsigned long flags; | |
309 | struct iscsi_cls_conn *conn; | |
310 | ||
311 | spin_lock_irqsave(&connlock, flags); | |
312 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 313 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
314 | spin_unlock_irqrestore(&connlock, flags); |
315 | return conn; | |
316 | } | |
317 | } | |
318 | spin_unlock_irqrestore(&connlock, flags); | |
319 | return NULL; | |
320 | } | |
321 | ||
7b8631b5 MC |
322 | /* |
323 | * The following functions can be used by LLDs that allocate | |
324 | * their own scsi_hosts or by software iscsi LLDs | |
325 | */ | |
6eabafbe MC |
326 | static struct { |
327 | int value; | |
328 | char *name; | |
329 | } iscsi_session_state_names[] = { | |
330 | { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, | |
331 | { ISCSI_SESSION_FAILED, "FAILED" }, | |
332 | { ISCSI_SESSION_FREE, "FREE" }, | |
333 | }; | |
334 | ||
3b0f208a | 335 | static const char *iscsi_session_state_name(int state) |
6eabafbe MC |
336 | { |
337 | int i; | |
338 | char *name = NULL; | |
339 | ||
340 | for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { | |
341 | if (iscsi_session_state_names[i].value == state) { | |
342 | name = iscsi_session_state_names[i].name; | |
343 | break; | |
344 | } | |
345 | } | |
346 | return name; | |
347 | } | |
348 | ||
349 | int iscsi_session_chkready(struct iscsi_cls_session *session) | |
350 | { | |
351 | unsigned long flags; | |
352 | int err; | |
353 | ||
354 | spin_lock_irqsave(&session->lock, flags); | |
355 | switch (session->state) { | |
356 | case ISCSI_SESSION_LOGGED_IN: | |
357 | err = 0; | |
358 | break; | |
359 | case ISCSI_SESSION_FAILED: | |
9a1a69a1 | 360 | err = DID_IMM_RETRY << 16; |
6eabafbe MC |
361 | break; |
362 | case ISCSI_SESSION_FREE: | |
56d7fcfa | 363 | err = DID_TRANSPORT_FAILFAST << 16; |
6eabafbe MC |
364 | break; |
365 | default: | |
366 | err = DID_NO_CONNECT << 16; | |
367 | break; | |
368 | } | |
369 | spin_unlock_irqrestore(&session->lock, flags); | |
370 | return err; | |
371 | } | |
372 | EXPORT_SYMBOL_GPL(iscsi_session_chkready); | |
373 | ||
7b8631b5 MC |
374 | static void iscsi_session_release(struct device *dev) |
375 | { | |
376 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 377 | struct Scsi_Host *shost; |
0896b752 | 378 | |
7b8631b5 MC |
379 | shost = iscsi_session_to_shost(session); |
380 | scsi_host_put(shost); | |
381 | kfree(session); | |
7b8631b5 | 382 | } |
0896b752 | 383 | |
7b8631b5 MC |
384 | static int iscsi_is_session_dev(const struct device *dev) |
385 | { | |
386 | return dev->release == iscsi_session_release; | |
387 | } | |
0896b752 | 388 | |
a4804cd6 MC |
389 | static int iscsi_iter_session_fn(struct device *dev, void *data) |
390 | { | |
391 | void (* fn) (struct iscsi_cls_session *) = data; | |
392 | ||
393 | if (!iscsi_is_session_dev(dev)) | |
394 | return 0; | |
395 | fn(iscsi_dev_to_session(dev)); | |
396 | return 0; | |
397 | } | |
398 | ||
399 | void iscsi_host_for_each_session(struct Scsi_Host *shost, | |
400 | void (*fn)(struct iscsi_cls_session *)) | |
401 | { | |
402 | device_for_each_child(&shost->shost_gendev, fn, | |
403 | iscsi_iter_session_fn); | |
404 | } | |
405 | EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); | |
406 | ||
8aae18ad MC |
407 | /** |
408 | * iscsi_scan_finished - helper to report when running scans are done | |
409 | * @shost: scsi host | |
410 | * @time: scan run time | |
411 | * | |
412 | * This function can be used by drives like qla4xxx to report to the scsi | |
413 | * layer when the scans it kicked off at module load time are done. | |
414 | */ | |
415 | int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
416 | { | |
32c6e1b9 | 417 | struct iscsi_cls_host *ihost = shost->shost_data; |
8aae18ad MC |
418 | /* |
419 | * qla4xxx will have kicked off some session unblocks before calling | |
420 | * scsi_scan_host, so just wait for them to complete. | |
421 | */ | |
422 | return !atomic_read(&ihost->nr_scans); | |
423 | } | |
424 | EXPORT_SYMBOL_GPL(iscsi_scan_finished); | |
425 | ||
7970634b MC |
426 | struct iscsi_scan_data { |
427 | unsigned int channel; | |
428 | unsigned int id; | |
429 | unsigned int lun; | |
430 | }; | |
431 | ||
432 | static int iscsi_user_scan_session(struct device *dev, void *data) | |
30a6c652 | 433 | { |
7970634b | 434 | struct iscsi_scan_data *scan_data = data; |
30a6c652 | 435 | struct iscsi_cls_session *session; |
7970634b MC |
436 | struct Scsi_Host *shost; |
437 | struct iscsi_cls_host *ihost; | |
438 | unsigned long flags; | |
439 | unsigned int id; | |
440 | ||
441 | if (!iscsi_is_session_dev(dev)) | |
442 | return 0; | |
443 | ||
444 | session = iscsi_dev_to_session(dev); | |
445 | shost = iscsi_session_to_shost(session); | |
446 | ihost = shost->shost_data; | |
30a6c652 MC |
447 | |
448 | mutex_lock(&ihost->mutex); | |
7970634b MC |
449 | spin_lock_irqsave(&session->lock, flags); |
450 | if (session->state != ISCSI_SESSION_LOGGED_IN) { | |
451 | spin_unlock_irqrestore(&session->lock, flags); | |
452 | mutex_unlock(&ihost->mutex); | |
453 | return 0; | |
30a6c652 | 454 | } |
7970634b MC |
455 | id = session->target_id; |
456 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 457 | |
7970634b MC |
458 | if (id != ISCSI_MAX_TARGET) { |
459 | if ((scan_data->channel == SCAN_WILD_CARD || | |
460 | scan_data->channel == 0) && | |
461 | (scan_data->id == SCAN_WILD_CARD || | |
462 | scan_data->id == id)) | |
463 | scsi_scan_target(&session->dev, 0, id, | |
464 | scan_data->lun, 1); | |
465 | } | |
466 | mutex_unlock(&ihost->mutex); | |
30a6c652 MC |
467 | return 0; |
468 | } | |
469 | ||
7970634b MC |
470 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
471 | uint id, uint lun) | |
472 | { | |
473 | struct iscsi_scan_data scan_data; | |
474 | ||
475 | scan_data.channel = channel; | |
476 | scan_data.id = id; | |
477 | scan_data.lun = lun; | |
478 | ||
479 | return device_for_each_child(&shost->shost_gendev, &scan_data, | |
480 | iscsi_user_scan_session); | |
481 | } | |
482 | ||
bd976f62 MC |
483 | static void iscsi_scan_session(struct work_struct *work) |
484 | { | |
485 | struct iscsi_cls_session *session = | |
486 | container_of(work, struct iscsi_cls_session, scan_work); | |
8aae18ad | 487 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 488 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 489 | struct iscsi_scan_data scan_data; |
bd976f62 | 490 | |
7970634b MC |
491 | scan_data.channel = 0; |
492 | scan_data.id = SCAN_WILD_CARD; | |
493 | scan_data.lun = SCAN_WILD_CARD; | |
bd976f62 | 494 | |
7970634b | 495 | iscsi_user_scan_session(&session->dev, &scan_data); |
8aae18ad | 496 | atomic_dec(&ihost->nr_scans); |
bd976f62 MC |
497 | } |
498 | ||
c4028958 | 499 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 500 | { |
c4028958 DH |
501 | struct iscsi_cls_session *session = |
502 | container_of(work, struct iscsi_cls_session, | |
503 | recovery_work.work); | |
6eabafbe | 504 | unsigned long flags; |
30a6c652 | 505 | |
322d739d MC |
506 | iscsi_cls_session_printk(KERN_INFO, session, |
507 | "session recovery timed out after %d secs\n", | |
508 | session->recovery_tmo); | |
30a6c652 | 509 | |
6eabafbe MC |
510 | spin_lock_irqsave(&session->lock, flags); |
511 | switch (session->state) { | |
512 | case ISCSI_SESSION_FAILED: | |
513 | session->state = ISCSI_SESSION_FREE; | |
514 | break; | |
515 | case ISCSI_SESSION_LOGGED_IN: | |
516 | case ISCSI_SESSION_FREE: | |
517 | /* we raced with the unblock's flush */ | |
518 | spin_unlock_irqrestore(&session->lock, flags); | |
519 | return; | |
520 | } | |
521 | spin_unlock_irqrestore(&session->lock, flags); | |
522 | ||
30a6c652 MC |
523 | if (session->transport->session_recovery_timedout) |
524 | session->transport->session_recovery_timedout(session); | |
525 | ||
526 | scsi_target_unblock(&session->dev); | |
527 | } | |
528 | ||
45ab33b6 | 529 | static void __iscsi_unblock_session(struct work_struct *work) |
6eabafbe | 530 | { |
45ab33b6 MC |
531 | struct iscsi_cls_session *session = |
532 | container_of(work, struct iscsi_cls_session, | |
533 | unblock_work); | |
bd976f62 | 534 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 535 | struct iscsi_cls_host *ihost = shost->shost_data; |
6eabafbe MC |
536 | unsigned long flags; |
537 | ||
45ab33b6 MC |
538 | /* |
539 | * The recovery and unblock work get run from the same workqueue, | |
540 | * so try to cancel it if it was going to run after this unblock. | |
541 | */ | |
542 | cancel_delayed_work(&session->recovery_work); | |
6eabafbe MC |
543 | spin_lock_irqsave(&session->lock, flags); |
544 | session->state = ISCSI_SESSION_LOGGED_IN; | |
545 | spin_unlock_irqrestore(&session->lock, flags); | |
45ab33b6 MC |
546 | /* start IO */ |
547 | scsi_target_unblock(&session->dev); | |
8aae18ad MC |
548 | /* |
549 | * Only do kernel scanning if the driver is properly hooked into | |
550 | * the async scanning code (drivers like iscsi_tcp do login and | |
551 | * scanning from userspace). | |
552 | */ | |
553 | if (shost->hostt->scan_finished) { | |
06d25af4 | 554 | if (scsi_queue_work(shost, &session->scan_work)) |
8aae18ad MC |
555 | atomic_inc(&ihost->nr_scans); |
556 | } | |
6eabafbe | 557 | } |
45ab33b6 MC |
558 | |
559 | /** | |
560 | * iscsi_unblock_session - set a session as logged in and start IO. | |
561 | * @session: iscsi session | |
562 | * | |
563 | * Mark a session as ready to accept IO. | |
564 | */ | |
565 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
566 | { | |
567 | queue_work(iscsi_eh_timer_workq, &session->unblock_work); | |
568 | /* | |
569 | * make sure all the events have completed before tell the driver | |
570 | * it is safe | |
571 | */ | |
572 | flush_workqueue(iscsi_eh_timer_workq); | |
573 | } | |
30a6c652 MC |
574 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
575 | ||
45ab33b6 | 576 | static void __iscsi_block_session(struct work_struct *work) |
30a6c652 | 577 | { |
45ab33b6 MC |
578 | struct iscsi_cls_session *session = |
579 | container_of(work, struct iscsi_cls_session, | |
580 | block_work); | |
6eabafbe MC |
581 | unsigned long flags; |
582 | ||
583 | spin_lock_irqsave(&session->lock, flags); | |
584 | session->state = ISCSI_SESSION_FAILED; | |
585 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 586 | scsi_target_block(&session->dev); |
d8bf541e MC |
587 | queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work, |
588 | session->recovery_tmo * HZ); | |
30a6c652 | 589 | } |
45ab33b6 MC |
590 | |
591 | void iscsi_block_session(struct iscsi_cls_session *session) | |
592 | { | |
593 | queue_work(iscsi_eh_timer_workq, &session->block_work); | |
594 | } | |
30a6c652 MC |
595 | EXPORT_SYMBOL_GPL(iscsi_block_session); |
596 | ||
26974789 MC |
597 | static void __iscsi_unbind_session(struct work_struct *work) |
598 | { | |
599 | struct iscsi_cls_session *session = | |
600 | container_of(work, struct iscsi_cls_session, | |
601 | unbind_work); | |
602 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 603 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 604 | unsigned long flags; |
26974789 MC |
605 | |
606 | /* Prevent new scans and make sure scanning is not in progress */ | |
607 | mutex_lock(&ihost->mutex); | |
7970634b MC |
608 | spin_lock_irqsave(&session->lock, flags); |
609 | if (session->target_id == ISCSI_MAX_TARGET) { | |
610 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
611 | mutex_unlock(&ihost->mutex); |
612 | return; | |
613 | } | |
7970634b MC |
614 | session->target_id = ISCSI_MAX_TARGET; |
615 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
616 | mutex_unlock(&ihost->mutex); |
617 | ||
618 | scsi_remove_target(&session->dev); | |
619 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
620 | } | |
621 | ||
7b8631b5 | 622 | struct iscsi_cls_session * |
5d91e209 MC |
623 | iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
624 | int dd_size) | |
7b8631b5 MC |
625 | { |
626 | struct iscsi_cls_session *session; | |
7b8631b5 | 627 | |
5d91e209 | 628 | session = kzalloc(sizeof(*session) + dd_size, |
b5c7a12d | 629 | GFP_KERNEL); |
7b8631b5 | 630 | if (!session) |
f53a88da MC |
631 | return NULL; |
632 | ||
7b8631b5 | 633 | session->transport = transport; |
30a6c652 | 634 | session->recovery_tmo = 120; |
6eabafbe | 635 | session->state = ISCSI_SESSION_FREE; |
c4028958 | 636 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 | 637 | INIT_LIST_HEAD(&session->sess_list); |
45ab33b6 MC |
638 | INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
639 | INIT_WORK(&session->block_work, __iscsi_block_session); | |
26974789 | 640 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
bd976f62 | 641 | INIT_WORK(&session->scan_work, iscsi_scan_session); |
6eabafbe | 642 | spin_lock_init(&session->lock); |
7b8631b5 | 643 | |
6a8a0d36 MC |
644 | /* this is released in the dev's release function */ |
645 | scsi_host_get(shost); | |
8434aa8b MC |
646 | session->dev.parent = &shost->shost_gendev; |
647 | session->dev.release = iscsi_session_release; | |
648 | device_initialize(&session->dev); | |
5d91e209 | 649 | if (dd_size) |
b5c7a12d | 650 | session->dd_data = &session[1]; |
8434aa8b MC |
651 | return session; |
652 | } | |
653 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
654 | ||
7970634b MC |
655 | static int iscsi_get_next_target_id(struct device *dev, void *data) |
656 | { | |
657 | struct iscsi_cls_session *session; | |
658 | unsigned long flags; | |
659 | int err = 0; | |
660 | ||
661 | if (!iscsi_is_session_dev(dev)) | |
662 | return 0; | |
663 | ||
664 | session = iscsi_dev_to_session(dev); | |
665 | spin_lock_irqsave(&session->lock, flags); | |
666 | if (*((unsigned int *) data) == session->target_id) | |
667 | err = -EEXIST; | |
668 | spin_unlock_irqrestore(&session->lock, flags); | |
669 | return err; | |
670 | } | |
671 | ||
6a8a0d36 | 672 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
673 | { |
674 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 675 | struct iscsi_cls_host *ihost; |
26974789 | 676 | unsigned long flags; |
7970634b | 677 | unsigned int id = target_id; |
8434aa8b | 678 | int err; |
b5c7a12d | 679 | |
30a6c652 | 680 | ihost = shost->shost_data; |
41be1444 | 681 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
7970634b MC |
682 | |
683 | if (id == ISCSI_MAX_TARGET) { | |
684 | for (id = 0; id < ISCSI_MAX_TARGET; id++) { | |
685 | err = device_for_each_child(&shost->shost_gendev, &id, | |
686 | iscsi_get_next_target_id); | |
687 | if (!err) | |
688 | break; | |
689 | } | |
690 | ||
691 | if (id == ISCSI_MAX_TARGET) { | |
692 | iscsi_cls_session_printk(KERN_ERR, session, | |
693 | "Too many iscsi targets. Max " | |
694 | "number of targets is %d.\n", | |
695 | ISCSI_MAX_TARGET - 1); | |
696 | goto release_host; | |
697 | } | |
698 | } | |
699 | session->target_id = id; | |
30a6c652 | 700 | |
71610f55 | 701 | dev_set_name(&session->dev, "session%u", session->sid); |
8434aa8b | 702 | err = device_add(&session->dev); |
7b8631b5 | 703 | if (err) { |
322d739d MC |
704 | iscsi_cls_session_printk(KERN_ERR, session, |
705 | "could not register session's dev\n"); | |
8434aa8b | 706 | goto release_host; |
7b8631b5 MC |
707 | } |
708 | transport_register_device(&session->dev); | |
709 | ||
26974789 MC |
710 | spin_lock_irqsave(&sesslock, flags); |
711 | list_add(&session->sess_list, &sesslist); | |
712 | spin_unlock_irqrestore(&sesslock, flags); | |
713 | ||
26974789 | 714 | iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); |
8434aa8b | 715 | return 0; |
30a6c652 | 716 | |
8434aa8b MC |
717 | release_host: |
718 | scsi_host_put(shost); | |
719 | return err; | |
7b8631b5 | 720 | } |
8434aa8b | 721 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
722 | |
723 | /** | |
8434aa8b MC |
724 | * iscsi_create_session - create iscsi class session |
725 | * @shost: scsi host | |
726 | * @transport: iscsi transport | |
5d91e209 | 727 | * @dd_size: private driver data size |
eb44820c | 728 | * @target_id: which target |
7b8631b5 | 729 | * |
8434aa8b | 730 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 731 | */ |
8434aa8b | 732 | struct iscsi_cls_session * |
5d91e209 MC |
733 | iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
734 | int dd_size, unsigned int target_id) | |
8434aa8b MC |
735 | { |
736 | struct iscsi_cls_session *session; | |
737 | ||
5d91e209 | 738 | session = iscsi_alloc_session(shost, transport, dd_size); |
8434aa8b MC |
739 | if (!session) |
740 | return NULL; | |
741 | ||
6a8a0d36 | 742 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
743 | iscsi_free_session(session); |
744 | return NULL; | |
745 | } | |
746 | return session; | |
747 | } | |
748 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
749 | ||
26974789 MC |
750 | static void iscsi_conn_release(struct device *dev) |
751 | { | |
752 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
753 | struct device *parent = conn->dev.parent; | |
754 | ||
755 | kfree(conn); | |
756 | put_device(parent); | |
757 | } | |
758 | ||
759 | static int iscsi_is_conn_dev(const struct device *dev) | |
760 | { | |
761 | return dev->release == iscsi_conn_release; | |
762 | } | |
763 | ||
764 | static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) | |
765 | { | |
766 | if (!iscsi_is_conn_dev(dev)) | |
767 | return 0; | |
768 | return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); | |
769 | } | |
770 | ||
8434aa8b | 771 | void iscsi_remove_session(struct iscsi_cls_session *session) |
7b8631b5 | 772 | { |
30a6c652 | 773 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
26974789 MC |
774 | unsigned long flags; |
775 | int err; | |
776 | ||
777 | spin_lock_irqsave(&sesslock, flags); | |
778 | list_del(&session->sess_list); | |
779 | spin_unlock_irqrestore(&sesslock, flags); | |
30a6c652 | 780 | |
45ab33b6 MC |
781 | /* make sure there are no blocks/unblocks queued */ |
782 | flush_workqueue(iscsi_eh_timer_workq); | |
783 | /* make sure the timedout callout is not running */ | |
784 | if (!cancel_delayed_work(&session->recovery_work)) | |
785 | flush_workqueue(iscsi_eh_timer_workq); | |
26974789 MC |
786 | /* |
787 | * If we are blocked let commands flow again. The lld or iscsi | |
788 | * layer should set up the queuecommand to fail commands. | |
45ab33b6 MC |
789 | * We assume that LLD will not be calling block/unblock while |
790 | * removing the session. | |
26974789 | 791 | */ |
6eabafbe MC |
792 | spin_lock_irqsave(&session->lock, flags); |
793 | session->state = ISCSI_SESSION_FREE; | |
794 | spin_unlock_irqrestore(&session->lock, flags); | |
bd976f62 | 795 | |
45ab33b6 MC |
796 | scsi_target_unblock(&session->dev); |
797 | /* flush running scans then delete devices */ | |
06d25af4 | 798 | scsi_flush_work(shost); |
45ab33b6 | 799 | __iscsi_unbind_session(&session->unbind_work); |
30a6c652 | 800 | |
26974789 MC |
801 | /* hw iscsi may not have removed all connections from session */ |
802 | err = device_for_each_child(&session->dev, NULL, | |
803 | iscsi_iter_destroy_conn_fn); | |
804 | if (err) | |
322d739d MC |
805 | iscsi_cls_session_printk(KERN_ERR, session, |
806 | "Could not delete all connections " | |
807 | "for session. Error %d.\n", err); | |
8434aa8b | 808 | |
7b8631b5 | 809 | transport_unregister_device(&session->dev); |
8434aa8b MC |
810 | device_del(&session->dev); |
811 | } | |
812 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
813 | ||
814 | void iscsi_free_session(struct iscsi_cls_session *session) | |
815 | { | |
26974789 | 816 | iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
8434aa8b | 817 | put_device(&session->dev); |
7b8631b5 | 818 | } |
8434aa8b MC |
819 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
820 | ||
821 | /** | |
822 | * iscsi_destroy_session - destroy iscsi session | |
823 | * @session: iscsi_session | |
824 | * | |
825 | * Can be called by a LLD or iscsi_transport. There must not be | |
826 | * any running connections. | |
eb44820c | 827 | */ |
8434aa8b MC |
828 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
829 | { | |
830 | iscsi_remove_session(session); | |
831 | iscsi_free_session(session); | |
832 | return 0; | |
833 | } | |
7b8631b5 MC |
834 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
835 | ||
7b8631b5 MC |
836 | /** |
837 | * iscsi_create_conn - create iscsi class connection | |
838 | * @session: iscsi cls session | |
5d91e209 | 839 | * @dd_size: private driver data size |
7b8631b5 MC |
840 | * @cid: connection id |
841 | * | |
842 | * This can be called from a LLD or iscsi_transport. The connection | |
843 | * is child of the session so cid must be unique for all connections | |
844 | * on the session. | |
b5c7a12d MC |
845 | * |
846 | * Since we do not support MCS, cid will normally be zero. In some cases | |
847 | * for software iscsi we could be trying to preallocate a connection struct | |
848 | * in which case there could be two connection structs and cid would be | |
849 | * non-zero. | |
eb44820c | 850 | */ |
7b8631b5 | 851 | struct iscsi_cls_conn * |
5d91e209 | 852 | iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) |
7b8631b5 MC |
853 | { |
854 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 | 855 | struct iscsi_cls_conn *conn; |
26974789 | 856 | unsigned long flags; |
7b8631b5 MC |
857 | int err; |
858 | ||
5d91e209 | 859 | conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); |
7b8631b5 MC |
860 | if (!conn) |
861 | return NULL; | |
5d91e209 | 862 | if (dd_size) |
7b8631b5 MC |
863 | conn->dd_data = &conn[1]; |
864 | ||
865 | INIT_LIST_HEAD(&conn->conn_list); | |
866 | conn->transport = transport; | |
b5c7a12d | 867 | conn->cid = cid; |
7b8631b5 MC |
868 | |
869 | /* this is released in the dev's release function */ | |
870 | if (!get_device(&session->dev)) | |
43a145a3 | 871 | goto free_conn; |
b5c7a12d | 872 | |
71610f55 | 873 | dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); |
7b8631b5 MC |
874 | conn->dev.parent = &session->dev; |
875 | conn->dev.release = iscsi_conn_release; | |
876 | err = device_register(&conn->dev); | |
877 | if (err) { | |
322d739d MC |
878 | iscsi_cls_session_printk(KERN_ERR, session, "could not " |
879 | "register connection's dev\n"); | |
7b8631b5 MC |
880 | goto release_parent_ref; |
881 | } | |
882 | transport_register_device(&conn->dev); | |
26974789 MC |
883 | |
884 | spin_lock_irqsave(&connlock, flags); | |
885 | list_add(&conn->conn_list, &connlist); | |
886 | conn->active = 1; | |
887 | spin_unlock_irqrestore(&connlock, flags); | |
7b8631b5 MC |
888 | return conn; |
889 | ||
890 | release_parent_ref: | |
891 | put_device(&session->dev); | |
892 | free_conn: | |
893 | kfree(conn); | |
894 | return NULL; | |
895 | } | |
896 | ||
897 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
898 | ||
899 | /** | |
900 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 901 | * @conn: iscsi cls session |
7b8631b5 | 902 | * |
26974789 | 903 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 904 | */ |
7b8631b5 MC |
905 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
906 | { | |
26974789 MC |
907 | unsigned long flags; |
908 | ||
909 | spin_lock_irqsave(&connlock, flags); | |
910 | conn->active = 0; | |
911 | list_del(&conn->conn_list); | |
912 | spin_unlock_irqrestore(&connlock, flags); | |
913 | ||
7b8631b5 MC |
914 | transport_unregister_device(&conn->dev); |
915 | device_unregister(&conn->dev); | |
916 | return 0; | |
917 | } | |
7b8631b5 MC |
918 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
919 | ||
7b8631b5 MC |
920 | /* |
921 | * iscsi interface functions | |
922 | */ | |
0896b752 AA |
923 | static struct iscsi_internal * |
924 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
925 | { | |
926 | struct iscsi_internal *priv; | |
927 | unsigned long flags; | |
928 | ||
929 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
930 | list_for_each_entry(priv, &iscsi_transports, list) { | |
931 | if (tt == priv->iscsi_transport) { | |
932 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
933 | return priv; | |
934 | } | |
935 | } | |
936 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
937 | return NULL; | |
938 | } | |
1da177e4 | 939 | |
53cb8a1f | 940 | static int |
43a145a3 | 941 | iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp) |
53cb8a1f | 942 | { |
ff491a73 | 943 | return netlink_broadcast(nls, skb, 0, 1, gfp); |
53cb8a1f MC |
944 | } |
945 | ||
0896b752 | 946 | static int |
43a145a3 | 947 | iscsi_unicast_skb(struct sk_buff *skb, int pid) |
0896b752 | 948 | { |
0896b752 | 949 | int rc; |
1da177e4 | 950 | |
790f39a2 | 951 | rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT); |
0896b752 | 952 | if (rc < 0) { |
0896b752 AA |
953 | printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc); |
954 | return rc; | |
955 | } | |
956 | ||
0896b752 | 957 | return 0; |
1da177e4 | 958 | } |
1da177e4 | 959 | |
7b7232f3 | 960 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 961 | char *data, uint32_t data_size) |
1da177e4 | 962 | { |
0896b752 AA |
963 | struct nlmsghdr *nlh; |
964 | struct sk_buff *skb; | |
965 | struct iscsi_uevent *ev; | |
0896b752 | 966 | char *pdu; |
790f39a2 | 967 | struct iscsi_internal *priv; |
0896b752 AA |
968 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
969 | data_size); | |
970 | ||
790f39a2 MC |
971 | priv = iscsi_if_transport_lookup(conn->transport); |
972 | if (!priv) | |
973 | return -EINVAL; | |
974 | ||
43a145a3 | 975 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 976 | if (!skb) { |
e5bd7b54 | 977 | iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); |
322d739d MC |
978 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
979 | "control PDU: OOM\n"); | |
0896b752 AA |
980 | return -ENOMEM; |
981 | } | |
1da177e4 | 982 | |
790f39a2 | 983 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
984 | ev = NLMSG_DATA(nlh); |
985 | memset(ev, 0, sizeof(*ev)); | |
986 | ev->transport_handle = iscsi_handle(conn->transport); | |
987 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
988 | ev->r.recv_req.cid = conn->cid; |
989 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
990 | pdu = (char*)ev + sizeof(*ev); |
991 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
992 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 993 | |
43a145a3 | 994 | return iscsi_unicast_skb(skb, priv->daemon_pid); |
1da177e4 | 995 | } |
0896b752 | 996 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 997 | |
e5bd7b54 | 998 | void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 999 | { |
0896b752 AA |
1000 | struct nlmsghdr *nlh; |
1001 | struct sk_buff *skb; | |
1002 | struct iscsi_uevent *ev; | |
790f39a2 | 1003 | struct iscsi_internal *priv; |
0896b752 AA |
1004 | int len = NLMSG_SPACE(sizeof(*ev)); |
1005 | ||
790f39a2 MC |
1006 | priv = iscsi_if_transport_lookup(conn->transport); |
1007 | if (!priv) | |
1008 | return; | |
1009 | ||
43a145a3 | 1010 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1011 | if (!skb) { |
322d739d MC |
1012 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
1013 | "conn error (%d)\n", error); | |
0896b752 AA |
1014 | return; |
1015 | } | |
1016 | ||
790f39a2 | 1017 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1018 | ev = NLMSG_DATA(nlh); |
1019 | ev->transport_handle = iscsi_handle(conn->transport); | |
1020 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 1021 | ev->r.connerror.error = error; |
b5c7a12d MC |
1022 | ev->r.connerror.cid = conn->cid; |
1023 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 1024 | |
43a145a3 | 1025 | iscsi_broadcast_skb(skb, GFP_ATOMIC); |
1da177e4 | 1026 | |
322d739d MC |
1027 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
1028 | error); | |
0896b752 | 1029 | } |
e5bd7b54 | 1030 | EXPORT_SYMBOL_GPL(iscsi_conn_error_event); |
0896b752 AA |
1031 | |
1032 | static int | |
1033 | iscsi_if_send_reply(int pid, int seq, int type, int done, int multi, | |
1034 | void *payload, int size) | |
1035 | { | |
1036 | struct sk_buff *skb; | |
1037 | struct nlmsghdr *nlh; | |
1038 | int len = NLMSG_SPACE(size); | |
1039 | int flags = multi ? NLM_F_MULTI : 0; | |
1040 | int t = done ? NLMSG_DONE : type; | |
1041 | ||
43a145a3 | 1042 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
1043 | if (!skb) { |
1044 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
1045 | return -ENOMEM; | |
1046 | } | |
0896b752 AA |
1047 | |
1048 | nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0); | |
1049 | nlh->nlmsg_flags = flags; | |
1050 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43a145a3 | 1051 | return iscsi_unicast_skb(skb, pid); |
1da177e4 | 1052 | } |
1da177e4 | 1053 | |
7b8631b5 | 1054 | static int |
5b940adf | 1055 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
1056 | { |
1057 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1058 | struct iscsi_stats *stats; | |
1059 | struct sk_buff *skbstat; | |
1060 | struct iscsi_cls_conn *conn; | |
1061 | struct nlmsghdr *nlhstat; | |
1062 | struct iscsi_uevent *evstat; | |
790f39a2 | 1063 | struct iscsi_internal *priv; |
7b8631b5 MC |
1064 | int len = NLMSG_SPACE(sizeof(*ev) + |
1065 | sizeof(struct iscsi_stats) + | |
1066 | sizeof(struct iscsi_stats_custom) * | |
1067 | ISCSI_STATS_CUSTOM_MAX); | |
1068 | int err = 0; | |
0896b752 | 1069 | |
790f39a2 MC |
1070 | priv = iscsi_if_transport_lookup(transport); |
1071 | if (!priv) | |
1072 | return -EINVAL; | |
1073 | ||
b5c7a12d | 1074 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
1075 | if (!conn) |
1076 | return -EEXIST; | |
0896b752 | 1077 | |
7b8631b5 MC |
1078 | do { |
1079 | int actual_size; | |
0896b752 | 1080 | |
43a145a3 | 1081 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 | 1082 | if (!skbstat) { |
322d739d MC |
1083 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
1084 | "deliver stats: OOM\n"); | |
7b8631b5 MC |
1085 | return -ENOMEM; |
1086 | } | |
1087 | ||
790f39a2 | 1088 | nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0, |
7b8631b5 MC |
1089 | (len - sizeof(*nlhstat)), 0); |
1090 | evstat = NLMSG_DATA(nlhstat); | |
1091 | memset(evstat, 0, sizeof(*evstat)); | |
1092 | evstat->transport_handle = iscsi_handle(conn->transport); | |
1093 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
1094 | evstat->u.get_stats.cid = |
1095 | ev->u.get_stats.cid; | |
1096 | evstat->u.get_stats.sid = | |
1097 | ev->u.get_stats.sid; | |
7b8631b5 MC |
1098 | stats = (struct iscsi_stats *) |
1099 | ((char*)evstat + sizeof(*evstat)); | |
1100 | memset(stats, 0, sizeof(*stats)); | |
1101 | ||
7b7232f3 | 1102 | transport->get_stats(conn, stats); |
7b8631b5 MC |
1103 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
1104 | sizeof(struct iscsi_stats) + | |
1105 | sizeof(struct iscsi_stats_custom) * | |
1106 | stats->custom_length); | |
1107 | actual_size -= sizeof(*nlhstat); | |
1108 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 1109 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
1110 | nlhstat->nlmsg_len = actual_size; |
1111 | ||
43a145a3 | 1112 | err = iscsi_unicast_skb(skbstat, priv->daemon_pid); |
7b8631b5 MC |
1113 | } while (err < 0 && err != -ECONNREFUSED); |
1114 | ||
1115 | return err; | |
0896b752 AA |
1116 | } |
1117 | ||
53cb8a1f | 1118 | /** |
26974789 MC |
1119 | * iscsi_session_event - send session destr. completion event |
1120 | * @session: iscsi class session | |
1121 | * @event: type of event | |
eb44820c | 1122 | */ |
26974789 MC |
1123 | int iscsi_session_event(struct iscsi_cls_session *session, |
1124 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
1125 | { |
1126 | struct iscsi_internal *priv; | |
53cb8a1f MC |
1127 | struct Scsi_Host *shost; |
1128 | struct iscsi_uevent *ev; | |
1129 | struct sk_buff *skb; | |
1130 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
1131 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
1132 | ||
26974789 | 1133 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
1134 | if (!priv) |
1135 | return -EINVAL; | |
53cb8a1f MC |
1136 | shost = iscsi_session_to_shost(session); |
1137 | ||
43a145a3 | 1138 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 1139 | if (!skb) { |
322d739d MC |
1140 | iscsi_cls_session_printk(KERN_ERR, session, |
1141 | "Cannot notify userspace of session " | |
1142 | "event %u\n", event); | |
53cb8a1f MC |
1143 | return -ENOMEM; |
1144 | } | |
1145 | ||
1146 | nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); | |
1147 | ev = NLMSG_DATA(nlh); | |
26974789 | 1148 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 1149 | |
26974789 MC |
1150 | ev->type = event; |
1151 | switch (event) { | |
1152 | case ISCSI_KEVENT_DESTROY_SESSION: | |
1153 | ev->r.d_session.host_no = shost->host_no; | |
1154 | ev->r.d_session.sid = session->sid; | |
1155 | break; | |
1156 | case ISCSI_KEVENT_CREATE_SESSION: | |
1157 | ev->r.c_session_ret.host_no = shost->host_no; | |
1158 | ev->r.c_session_ret.sid = session->sid; | |
1159 | break; | |
1160 | case ISCSI_KEVENT_UNBIND_SESSION: | |
1161 | ev->r.unbind_session.host_no = shost->host_no; | |
1162 | ev->r.unbind_session.sid = session->sid; | |
1163 | break; | |
1164 | default: | |
322d739d MC |
1165 | iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
1166 | "%u.\n", event); | |
26974789 | 1167 | kfree_skb(skb); |
53cb8a1f | 1168 | return -EINVAL; |
53cb8a1f MC |
1169 | } |
1170 | ||
53cb8a1f MC |
1171 | /* |
1172 | * this will occur if the daemon is not up, so we just warn | |
1173 | * the user and when the daemon is restarted it will handle it | |
1174 | */ | |
43a145a3 | 1175 | rc = iscsi_broadcast_skb(skb, GFP_KERNEL); |
ff491a73 | 1176 | if (rc == -ESRCH) |
322d739d MC |
1177 | iscsi_cls_session_printk(KERN_ERR, session, |
1178 | "Cannot notify userspace of session " | |
1179 | "event %u. Check iscsi daemon\n", | |
1180 | event); | |
53cb8a1f MC |
1181 | return rc; |
1182 | } | |
26974789 | 1183 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 1184 | |
0896b752 | 1185 | static int |
d82ff9be MC |
1186 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, |
1187 | struct iscsi_uevent *ev, uint32_t initial_cmdsn, | |
40753caa | 1188 | uint16_t cmds_max, uint16_t queue_depth) |
0896b752 AA |
1189 | { |
1190 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 1191 | struct iscsi_cls_session *session; |
5e7facb7 | 1192 | struct Scsi_Host *shost; |
0896b752 | 1193 | |
d82ff9be | 1194 | session = transport->create_session(ep, cmds_max, queue_depth, |
5e7facb7 | 1195 | initial_cmdsn); |
7b7232f3 | 1196 | if (!session) |
7b8631b5 | 1197 | return -ENOMEM; |
0896b752 | 1198 | |
5e7facb7 MC |
1199 | shost = iscsi_session_to_shost(session); |
1200 | ev->r.c_session_ret.host_no = shost->host_no; | |
b5c7a12d | 1201 | ev->r.c_session_ret.sid = session->sid; |
0896b752 | 1202 | return 0; |
0896b752 AA |
1203 | } |
1204 | ||
1205 | static int | |
7b7232f3 | 1206 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 1207 | { |
7b8631b5 | 1208 | struct iscsi_cls_conn *conn; |
7b7232f3 | 1209 | struct iscsi_cls_session *session; |
7b8631b5 | 1210 | |
b5c7a12d MC |
1211 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
1212 | if (!session) { | |
322d739d | 1213 | printk(KERN_ERR "iscsi: invalid session %d.\n", |
b5c7a12d | 1214 | ev->u.c_conn.sid); |
7b8631b5 | 1215 | return -EINVAL; |
b5c7a12d | 1216 | } |
0896b752 | 1217 | |
7b7232f3 | 1218 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d | 1219 | if (!conn) { |
322d739d MC |
1220 | iscsi_cls_session_printk(KERN_ERR, session, |
1221 | "couldn't create a new connection."); | |
7b7232f3 | 1222 | return -ENOMEM; |
b5c7a12d | 1223 | } |
0896b752 | 1224 | |
b5c7a12d MC |
1225 | ev->r.c_conn_ret.sid = session->sid; |
1226 | ev->r.c_conn_ret.cid = conn->cid; | |
0896b752 | 1227 | return 0; |
1da177e4 LT |
1228 | } |
1229 | ||
0896b752 AA |
1230 | static int |
1231 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1232 | { | |
7b8631b5 | 1233 | struct iscsi_cls_conn *conn; |
0896b752 | 1234 | |
b5c7a12d | 1235 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 1236 | if (!conn) |
7b8631b5 | 1237 | return -EINVAL; |
0896b752 | 1238 | |
7b8631b5 MC |
1239 | if (transport->destroy_conn) |
1240 | transport->destroy_conn(conn); | |
7b8631b5 | 1241 | return 0; |
0896b752 AA |
1242 | } |
1243 | ||
fd7255f5 MC |
1244 | static int |
1245 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1246 | { | |
1247 | char *data = (char*)ev + sizeof(*ev); | |
1248 | struct iscsi_cls_conn *conn; | |
1249 | struct iscsi_cls_session *session; | |
a54a52ca | 1250 | int err = 0, value = 0; |
fd7255f5 MC |
1251 | |
1252 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
1253 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
1254 | if (!conn || !session) | |
1255 | return -EINVAL; | |
1256 | ||
1257 | switch (ev->u.set_param.param) { | |
30a6c652 | 1258 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 1259 | sscanf(data, "%d", &value); |
30a6c652 MC |
1260 | if (value != 0) |
1261 | session->recovery_tmo = value; | |
1262 | break; | |
fd7255f5 | 1263 | default: |
a54a52ca MC |
1264 | err = transport->set_param(conn, ev->u.set_param.param, |
1265 | data, ev->u.set_param.len); | |
fd7255f5 MC |
1266 | } |
1267 | ||
1268 | return err; | |
1269 | } | |
1270 | ||
264faaaa OG |
1271 | static int |
1272 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
1273 | struct iscsi_uevent *ev, int msg_type) | |
1274 | { | |
d82ff9be | 1275 | struct iscsi_endpoint *ep; |
264faaaa OG |
1276 | struct sockaddr *dst_addr; |
1277 | int rc = 0; | |
1278 | ||
1279 | switch (msg_type) { | |
1280 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: | |
1281 | if (!transport->ep_connect) | |
1282 | return -EINVAL; | |
1283 | ||
1284 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
d82ff9be MC |
1285 | ep = transport->ep_connect(dst_addr, |
1286 | ev->u.ep_connect.non_blocking); | |
1287 | if (IS_ERR(ep)) | |
1288 | return PTR_ERR(ep); | |
1289 | ||
1290 | ev->r.ep_connect_ret.handle = ep->id; | |
264faaaa OG |
1291 | break; |
1292 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1293 | if (!transport->ep_poll) | |
1294 | return -EINVAL; | |
1295 | ||
d82ff9be MC |
1296 | ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); |
1297 | if (!ep) | |
1298 | return -EINVAL; | |
1299 | ||
1300 | ev->r.retcode = transport->ep_poll(ep, | |
264faaaa OG |
1301 | ev->u.ep_poll.timeout_ms); |
1302 | break; | |
1303 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1304 | if (!transport->ep_disconnect) | |
1305 | return -EINVAL; | |
1306 | ||
d82ff9be MC |
1307 | ep = iscsi_lookup_endpoint(ev->u.ep_disconnect.ep_handle); |
1308 | if (!ep) | |
1309 | return -EINVAL; | |
1310 | ||
1311 | transport->ep_disconnect(ep); | |
264faaaa OG |
1312 | break; |
1313 | } | |
1314 | return rc; | |
1315 | } | |
1316 | ||
01cb225d MC |
1317 | static int |
1318 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
1319 | struct iscsi_uevent *ev) | |
1320 | { | |
2174a04e | 1321 | struct Scsi_Host *shost; |
01cb225d | 1322 | struct sockaddr *dst_addr; |
2174a04e | 1323 | int err; |
01cb225d MC |
1324 | |
1325 | if (!transport->tgt_dscvr) | |
1326 | return -EINVAL; | |
1327 | ||
2174a04e | 1328 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
315cb0ad | 1329 | if (!shost) { |
2174a04e MC |
1330 | printk(KERN_ERR "target discovery could not find host no %u\n", |
1331 | ev->u.tgt_dscvr.host_no); | |
1332 | return -ENODEV; | |
1333 | } | |
1334 | ||
1335 | ||
01cb225d | 1336 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
1337 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
1338 | ev->u.tgt_dscvr.enable, dst_addr); | |
1339 | scsi_host_put(shost); | |
1340 | return err; | |
01cb225d MC |
1341 | } |
1342 | ||
1d9bf13a MC |
1343 | static int |
1344 | iscsi_set_host_param(struct iscsi_transport *transport, | |
1345 | struct iscsi_uevent *ev) | |
1346 | { | |
1347 | char *data = (char*)ev + sizeof(*ev); | |
1348 | struct Scsi_Host *shost; | |
1349 | int err; | |
1350 | ||
1351 | if (!transport->set_host_param) | |
1352 | return -ENOSYS; | |
1353 | ||
1354 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
315cb0ad | 1355 | if (!shost) { |
1d9bf13a MC |
1356 | printk(KERN_ERR "set_host_param could not find host no %u\n", |
1357 | ev->u.set_host_param.host_no); | |
1358 | return -ENODEV; | |
1359 | } | |
1360 | ||
1361 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1362 | data, ev->u.set_host_param.len); | |
1363 | scsi_host_put(shost); | |
1364 | return err; | |
1365 | } | |
1366 | ||
0896b752 AA |
1367 | static int |
1368 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) | |
1369 | { | |
1370 | int err = 0; | |
1371 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1372 | struct iscsi_transport *transport = NULL; | |
1373 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1374 | struct iscsi_cls_session *session; |
1375 | struct iscsi_cls_conn *conn; | |
d82ff9be | 1376 | struct iscsi_endpoint *ep = NULL; |
0896b752 | 1377 | |
0896b752 AA |
1378 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1379 | if (!priv) | |
1380 | return -EINVAL; | |
1381 | transport = priv->iscsi_transport; | |
1382 | ||
7b7232f3 MC |
1383 | if (!try_module_get(transport->owner)) |
1384 | return -EINVAL; | |
1385 | ||
790f39a2 MC |
1386 | priv->daemon_pid = NETLINK_CREDS(skb)->pid; |
1387 | ||
0896b752 AA |
1388 | switch (nlh->nlmsg_type) { |
1389 | case ISCSI_UEVENT_CREATE_SESSION: | |
d82ff9be | 1390 | err = iscsi_if_create_session(priv, ep, ev, |
40753caa MC |
1391 | ev->u.c_session.initial_cmdsn, |
1392 | ev->u.c_session.cmds_max, | |
1393 | ev->u.c_session.queue_depth); | |
1394 | break; | |
1395 | case ISCSI_UEVENT_CREATE_BOUND_SESSION: | |
d82ff9be | 1396 | ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); |
c95fddc7 MC |
1397 | if (!ep) { |
1398 | err = -EINVAL; | |
1399 | break; | |
1400 | } | |
d82ff9be MC |
1401 | |
1402 | err = iscsi_if_create_session(priv, ep, ev, | |
40753caa MC |
1403 | ev->u.c_bound_session.initial_cmdsn, |
1404 | ev->u.c_bound_session.cmds_max, | |
1405 | ev->u.c_bound_session.queue_depth); | |
0896b752 AA |
1406 | break; |
1407 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1408 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1409 | if (session) |
7b7232f3 | 1410 | transport->destroy_session(session); |
26974789 MC |
1411 | else |
1412 | err = -EINVAL; | |
1413 | break; | |
1414 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1415 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1416 | if (session) | |
06d25af4 MC |
1417 | scsi_queue_work(iscsi_session_to_shost(session), |
1418 | &session->unbind_work); | |
26974789 | 1419 | else |
7b7232f3 | 1420 | err = -EINVAL; |
0896b752 AA |
1421 | break; |
1422 | case ISCSI_UEVENT_CREATE_CONN: | |
1423 | err = iscsi_if_create_conn(transport, ev); | |
1424 | break; | |
1425 | case ISCSI_UEVENT_DESTROY_CONN: | |
1426 | err = iscsi_if_destroy_conn(transport, ev); | |
1427 | break; | |
1428 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1429 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1430 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 MC |
1431 | |
1432 | if (session && conn) | |
1433 | ev->r.retcode = transport->bind_conn(session, conn, | |
264faaaa | 1434 | ev->u.b_conn.transport_eph, |
7b7232f3 MC |
1435 | ev->u.b_conn.is_leading); |
1436 | else | |
1437 | err = -EINVAL; | |
0896b752 AA |
1438 | break; |
1439 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1440 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1441 | break; |
1442 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1443 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1444 | if (conn) |
1445 | ev->r.retcode = transport->start_conn(conn); | |
1446 | else | |
1447 | err = -EINVAL; | |
0896b752 AA |
1448 | break; |
1449 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1450 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1451 | if (conn) |
1452 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1453 | else | |
1454 | err = -EINVAL; | |
0896b752 AA |
1455 | break; |
1456 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1457 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1458 | if (conn) |
1459 | ev->r.retcode = transport->send_pdu(conn, | |
1460 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1461 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1462 | ev->u.send_pdu.data_size); | |
1463 | else | |
1464 | err = -EINVAL; | |
0896b752 AA |
1465 | break; |
1466 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1467 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1468 | break; |
264faaaa OG |
1469 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1470 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1471 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1472 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); | |
1473 | break; | |
01cb225d MC |
1474 | case ISCSI_UEVENT_TGT_DSCVR: |
1475 | err = iscsi_tgt_dscvr(transport, ev); | |
1476 | break; | |
1d9bf13a MC |
1477 | case ISCSI_UEVENT_SET_HOST_PARAM: |
1478 | err = iscsi_set_host_param(transport, ev); | |
1479 | break; | |
0896b752 | 1480 | default: |
1d9bf13a | 1481 | err = -ENOSYS; |
0896b752 AA |
1482 | break; |
1483 | } | |
1484 | ||
7b7232f3 | 1485 | module_put(transport->owner); |
0896b752 AA |
1486 | return err; |
1487 | } | |
1488 | ||
b5c7a12d | 1489 | /* |
cd40b7d3 DL |
1490 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
1491 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 1492 | */ |
0896b752 | 1493 | static void |
cd40b7d3 | 1494 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 1495 | { |
0b950672 | 1496 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
1497 | while (skb->len >= NLMSG_SPACE(0)) { |
1498 | int err; | |
1499 | uint32_t rlen; | |
1500 | struct nlmsghdr *nlh; | |
1501 | struct iscsi_uevent *ev; | |
1502 | ||
1503 | nlh = nlmsg_hdr(skb); | |
1504 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
1505 | skb->len < nlh->nlmsg_len) { | |
1506 | break; | |
ee7f8e40 | 1507 | } |
ee7f8e40 | 1508 | |
cd40b7d3 DL |
1509 | ev = NLMSG_DATA(nlh); |
1510 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1511 | if (rlen > skb->len) | |
1512 | rlen = skb->len; | |
0896b752 | 1513 | |
cd40b7d3 DL |
1514 | err = iscsi_if_recv_msg(skb, nlh); |
1515 | if (err) { | |
1516 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1517 | ev->iferror = err; | |
0896b752 | 1518 | } |
cd40b7d3 DL |
1519 | do { |
1520 | /* | |
1521 | * special case for GET_STATS: | |
1522 | * on success - sending reply and stats from | |
1523 | * inside of if_recv_msg(), | |
1524 | * on error - fall through. | |
1525 | */ | |
1526 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1527 | break; | |
1528 | err = iscsi_if_send_reply( | |
1529 | NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq, | |
1530 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); | |
1531 | } while (err < 0 && err != -ECONNREFUSED); | |
1532 | skb_pull(skb, rlen); | |
0896b752 | 1533 | } |
0b950672 | 1534 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1535 | } |
1da177e4 | 1536 | |
fd7255f5 | 1537 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
ee959b00 | 1538 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
fd7255f5 MC |
1539 | __ATTR(_name,_mode,_show,_store) |
1540 | ||
1da177e4 | 1541 | /* |
0896b752 | 1542 | * iSCSI connection attrs |
1da177e4 | 1543 | */ |
a54a52ca | 1544 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1545 | static ssize_t \ |
ee959b00 TJ |
1546 | show_conn_param_##param(struct device *dev, \ |
1547 | struct device_attribute *attr, char *buf) \ | |
0896b752 | 1548 | { \ |
ee959b00 | 1549 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ |
7b8631b5 | 1550 | struct iscsi_transport *t = conn->transport; \ |
a54a52ca | 1551 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1552 | } |
1553 | ||
a54a52ca MC |
1554 | #define iscsi_conn_attr(field, param) \ |
1555 | iscsi_conn_attr_show(param) \ | |
1556 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1557 | NULL); |
0896b752 | 1558 | |
a54a52ca MC |
1559 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1560 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1561 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1562 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1563 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1564 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1565 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
1566 | iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT); | |
1567 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); | |
1568 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
1569 | iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
f6d5180c MC |
1570 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
1571 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 LT |
1572 | |
1573 | /* | |
0896b752 | 1574 | * iSCSI session attrs |
1da177e4 | 1575 | */ |
b2c64167 | 1576 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 1577 | static ssize_t \ |
ee959b00 TJ |
1578 | show_session_param_##param(struct device *dev, \ |
1579 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1580 | { \ |
ee959b00 TJ |
1581 | struct iscsi_cls_session *session = \ |
1582 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 | 1583 | struct iscsi_transport *t = session->transport; \ |
b2c64167 MC |
1584 | \ |
1585 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
1586 | return -EACCES; \ | |
a54a52ca | 1587 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
1588 | } |
1589 | ||
b2c64167 MC |
1590 | #define iscsi_session_attr(field, param, perm) \ |
1591 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 1592 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 MC |
1593 | NULL); |
1594 | ||
b2c64167 MC |
1595 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
1596 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
1597 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
1598 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
1599 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
1600 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
1601 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
1602 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
1603 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
1604 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
1605 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
1606 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
1607 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
1608 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
1609 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
1610 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
1611 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
88dfd340 MC |
1612 | iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); |
1613 | iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0) | |
1da177e4 | 1614 | |
6eabafbe | 1615 | static ssize_t |
ee959b00 TJ |
1616 | show_priv_session_state(struct device *dev, struct device_attribute *attr, |
1617 | char *buf) | |
6eabafbe | 1618 | { |
ee959b00 | 1619 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); |
6eabafbe MC |
1620 | return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); |
1621 | } | |
1622 | static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, | |
1623 | NULL); | |
1624 | ||
fd7255f5 MC |
1625 | #define iscsi_priv_session_attr_show(field, format) \ |
1626 | static ssize_t \ | |
ee959b00 TJ |
1627 | show_priv_session_##field(struct device *dev, \ |
1628 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1629 | { \ |
ee959b00 TJ |
1630 | struct iscsi_cls_session *session = \ |
1631 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 MC |
1632 | return sprintf(buf, format"\n", session->field); \ |
1633 | } | |
1634 | ||
1635 | #define iscsi_priv_session_attr(field, format) \ | |
1636 | iscsi_priv_session_attr_show(field, format) \ | |
1637 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \ | |
1638 | NULL) | |
30a6c652 | 1639 | iscsi_priv_session_attr(recovery_tmo, "%d"); |
fd7255f5 | 1640 | |
1819dc81 MC |
1641 | /* |
1642 | * iSCSI host attrs | |
1643 | */ | |
1644 | #define iscsi_host_attr_show(param) \ | |
1645 | static ssize_t \ | |
ee959b00 TJ |
1646 | show_host_param_##param(struct device *dev, \ |
1647 | struct device_attribute *attr, char *buf) \ | |
1819dc81 | 1648 | { \ |
ee959b00 | 1649 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1819dc81 MC |
1650 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ |
1651 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
1652 | } | |
1653 | ||
1654 | #define iscsi_host_attr(field, param) \ | |
1655 | iscsi_host_attr_show(param) \ | |
1656 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
1657 | NULL); | |
1658 | ||
d8196ed2 | 1659 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 1660 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 1661 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 1662 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 1663 | |
fd7255f5 MC |
1664 | #define SETUP_PRIV_SESSION_RD_ATTR(field) \ |
1665 | do { \ | |
ee959b00 | 1666 | priv->session_attrs[count] = &dev_attr_priv_sess_##field; \ |
fd7255f5 MC |
1667 | count++; \ |
1668 | } while (0) | |
1669 | ||
a54a52ca | 1670 | |
fd7255f5 MC |
1671 | #define SETUP_SESSION_RD_ATTR(field, param_flag) \ |
1672 | do { \ | |
1673 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1674 | priv->session_attrs[count] = &dev_attr_sess_##field; \ |
1da177e4 | 1675 | count++; \ |
fd7255f5 MC |
1676 | } \ |
1677 | } while (0) | |
1678 | ||
fd7255f5 MC |
1679 | #define SETUP_CONN_RD_ATTR(field, param_flag) \ |
1680 | do { \ | |
1681 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1682 | priv->conn_attrs[count] = &dev_attr_conn_##field; \ |
fd7255f5 MC |
1683 | count++; \ |
1684 | } \ | |
1685 | } while (0) | |
1da177e4 | 1686 | |
1819dc81 MC |
1687 | #define SETUP_HOST_RD_ATTR(field, param_flag) \ |
1688 | do { \ | |
1689 | if (tt->host_param_mask & param_flag) { \ | |
ee959b00 | 1690 | priv->host_attrs[count] = &dev_attr_host_##field; \ |
1819dc81 MC |
1691 | count++; \ |
1692 | } \ | |
1693 | } while (0) | |
1694 | ||
0896b752 AA |
1695 | static int iscsi_session_match(struct attribute_container *cont, |
1696 | struct device *dev) | |
1da177e4 | 1697 | { |
7b8631b5 | 1698 | struct iscsi_cls_session *session; |
1da177e4 | 1699 | struct Scsi_Host *shost; |
0896b752 AA |
1700 | struct iscsi_internal *priv; |
1701 | ||
1702 | if (!iscsi_is_session_dev(dev)) | |
1703 | return 0; | |
1da177e4 | 1704 | |
7b8631b5 MC |
1705 | session = iscsi_dev_to_session(dev); |
1706 | shost = iscsi_session_to_shost(session); | |
0896b752 | 1707 | if (!shost->transportt) |
1da177e4 LT |
1708 | return 0; |
1709 | ||
0896b752 AA |
1710 | priv = to_iscsi_internal(shost->transportt); |
1711 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
1712 | return 0; |
1713 | ||
0896b752 | 1714 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
1715 | } |
1716 | ||
0896b752 AA |
1717 | static int iscsi_conn_match(struct attribute_container *cont, |
1718 | struct device *dev) | |
1719 | { | |
7b8631b5 MC |
1720 | struct iscsi_cls_session *session; |
1721 | struct iscsi_cls_conn *conn; | |
1da177e4 | 1722 | struct Scsi_Host *shost; |
0896b752 | 1723 | struct iscsi_internal *priv; |
1da177e4 | 1724 | |
0896b752 | 1725 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
1726 | return 0; |
1727 | ||
7b8631b5 MC |
1728 | conn = iscsi_dev_to_conn(dev); |
1729 | session = iscsi_dev_to_session(conn->dev.parent); | |
1730 | shost = iscsi_session_to_shost(session); | |
1731 | ||
0896b752 | 1732 | if (!shost->transportt) |
1da177e4 LT |
1733 | return 0; |
1734 | ||
0896b752 AA |
1735 | priv = to_iscsi_internal(shost->transportt); |
1736 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
1737 | return 0; | |
1da177e4 | 1738 | |
0896b752 AA |
1739 | return &priv->conn_cont.ac == cont; |
1740 | } | |
1741 | ||
30a6c652 MC |
1742 | static int iscsi_host_match(struct attribute_container *cont, |
1743 | struct device *dev) | |
1744 | { | |
1745 | struct Scsi_Host *shost; | |
1746 | struct iscsi_internal *priv; | |
1747 | ||
1748 | if (!scsi_is_host_device(dev)) | |
1749 | return 0; | |
1750 | ||
1751 | shost = dev_to_shost(dev); | |
1752 | if (!shost->transportt || | |
1753 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
1754 | return 0; | |
1755 | ||
1756 | priv = to_iscsi_internal(shost->transportt); | |
1757 | return &priv->t.host_attrs.ac == cont; | |
1758 | } | |
1759 | ||
7b8631b5 MC |
1760 | struct scsi_transport_template * |
1761 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
1762 | { |
1763 | struct iscsi_internal *priv; | |
1764 | unsigned long flags; | |
1765 | int count = 0, err; | |
1766 | ||
1767 | BUG_ON(!tt); | |
1768 | ||
1769 | priv = iscsi_if_transport_lookup(tt); | |
1770 | if (priv) | |
7b8631b5 | 1771 | return NULL; |
0896b752 | 1772 | |
24669f75 | 1773 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 1774 | if (!priv) |
7b8631b5 | 1775 | return NULL; |
0896b752 | 1776 | INIT_LIST_HEAD(&priv->list); |
53cb8a1f | 1777 | priv->daemon_pid = -1; |
0896b752 | 1778 | priv->iscsi_transport = tt; |
30a6c652 | 1779 | priv->t.user_scan = iscsi_user_scan; |
06d25af4 | 1780 | priv->t.create_work_queue = 1; |
0896b752 | 1781 | |
ee959b00 | 1782 | priv->dev.class = &iscsi_transport_class; |
71610f55 | 1783 | dev_set_name(&priv->dev, "%s", tt->name); |
ee959b00 | 1784 | err = device_register(&priv->dev); |
0896b752 AA |
1785 | if (err) |
1786 | goto free_priv; | |
1787 | ||
ee959b00 | 1788 | err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); |
0896b752 | 1789 | if (err) |
ee959b00 | 1790 | goto unregister_dev; |
0896b752 | 1791 | |
30a6c652 MC |
1792 | /* host parameters */ |
1793 | priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; | |
1794 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; | |
1795 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
32c6e1b9 | 1796 | priv->t.host_size = sizeof(struct iscsi_cls_host); |
30a6c652 MC |
1797 | transport_container_register(&priv->t.host_attrs); |
1798 | ||
d8196ed2 | 1799 | SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); |
22236961 | 1800 | SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS); |
1819dc81 | 1801 | SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS); |
8ad5781a | 1802 | SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME); |
1819dc81 MC |
1803 | BUG_ON(count > ISCSI_HOST_ATTRS); |
1804 | priv->host_attrs[count] = NULL; | |
1805 | count = 0; | |
1806 | ||
0896b752 AA |
1807 | /* connection parameters */ |
1808 | priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; | |
1809 | priv->conn_cont.ac.class = &iscsi_connection_class.class; | |
1810 | priv->conn_cont.ac.match = iscsi_conn_match; | |
1811 | transport_container_register(&priv->conn_cont); | |
1da177e4 | 1812 | |
fd7255f5 MC |
1813 | SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH); |
1814 | SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH); | |
1815 | SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN); | |
1816 | SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN); | |
1817 | SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN); | |
1818 | SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN); | |
1819 | SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS); | |
1820 | SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT); | |
8d2860b3 | 1821 | SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN); |
a54a52ca MC |
1822 | SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS); |
1823 | SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT); | |
f6d5180c MC |
1824 | SETUP_CONN_RD_ATTR(ping_tmo, ISCSI_PING_TMO); |
1825 | SETUP_CONN_RD_ATTR(recv_tmo, ISCSI_RECV_TMO); | |
0896b752 AA |
1826 | |
1827 | BUG_ON(count > ISCSI_CONN_ATTRS); | |
1828 | priv->conn_attrs[count] = NULL; | |
1da177e4 | 1829 | count = 0; |
1da177e4 | 1830 | |
0896b752 AA |
1831 | /* session parameters */ |
1832 | priv->session_cont.ac.attrs = &priv->session_attrs[0]; | |
1833 | priv->session_cont.ac.class = &iscsi_session_class.class; | |
1834 | priv->session_cont.ac.match = iscsi_session_match; | |
1835 | transport_container_register(&priv->session_cont); | |
1836 | ||
fd7255f5 MC |
1837 | SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN); |
1838 | SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T); | |
1839 | SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN); | |
1840 | SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST); | |
1841 | SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST); | |
1842 | SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN); | |
1843 | SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN); | |
1844 | SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL); | |
a54a52ca MC |
1845 | SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME); |
1846 | SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT); | |
b2c64167 MC |
1847 | SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME); |
1848 | SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN); | |
1849 | SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD); | |
1850 | SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN); | |
843c0a8a | 1851 | SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); |
4cd49ea1 MC |
1852 | SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO); |
1853 | SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO); | |
88dfd340 MC |
1854 | SETUP_SESSION_RD_ATTR(ifacename, ISCSI_IFACE_NAME); |
1855 | SETUP_SESSION_RD_ATTR(initiatorname, ISCSI_INITIATOR_NAME); | |
30a6c652 | 1856 | SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); |
6eabafbe | 1857 | SETUP_PRIV_SESSION_RD_ATTR(state); |
fd7255f5 | 1858 | |
0896b752 AA |
1859 | BUG_ON(count > ISCSI_SESSION_ATTRS); |
1860 | priv->session_attrs[count] = NULL; | |
1861 | ||
1862 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1863 | list_add(&priv->list, &iscsi_transports); | |
1864 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1865 | ||
1866 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 1867 | return &priv->t; |
1da177e4 | 1868 | |
ee959b00 TJ |
1869 | unregister_dev: |
1870 | device_unregister(&priv->dev); | |
d82ff9be | 1871 | return NULL; |
0896b752 AA |
1872 | free_priv: |
1873 | kfree(priv); | |
7b8631b5 | 1874 | return NULL; |
1da177e4 | 1875 | } |
0896b752 AA |
1876 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
1877 | ||
1878 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
1879 | { | |
1880 | struct iscsi_internal *priv; | |
1881 | unsigned long flags; | |
1882 | ||
1883 | BUG_ON(!tt); | |
1884 | ||
0b950672 | 1885 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
1886 | |
1887 | priv = iscsi_if_transport_lookup(tt); | |
1888 | BUG_ON (!priv); | |
1889 | ||
0896b752 AA |
1890 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
1891 | list_del(&priv->list); | |
1892 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1893 | ||
1894 | transport_container_unregister(&priv->conn_cont); | |
1895 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 1896 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 | 1897 | |
ee959b00 TJ |
1898 | sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); |
1899 | device_unregister(&priv->dev); | |
0b950672 | 1900 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 1901 | |
0896b752 AA |
1902 | return 0; |
1903 | } | |
1904 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 1905 | |
1da177e4 LT |
1906 | static __init int iscsi_transport_init(void) |
1907 | { | |
0896b752 | 1908 | int err; |
1da177e4 | 1909 | |
09492605 | 1910 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
1911 | ISCSI_TRANSPORT_VERSION); |
1912 | ||
41be1444 MC |
1913 | atomic_set(&iscsi_session_nr, 0); |
1914 | ||
0896b752 | 1915 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
1916 | if (err) |
1917 | return err; | |
0896b752 | 1918 | |
d82ff9be | 1919 | err = class_register(&iscsi_endpoint_class); |
0896b752 AA |
1920 | if (err) |
1921 | goto unregister_transport_class; | |
1922 | ||
d82ff9be MC |
1923 | err = transport_class_register(&iscsi_host_class); |
1924 | if (err) | |
1925 | goto unregister_endpoint_class; | |
1926 | ||
30a6c652 MC |
1927 | err = transport_class_register(&iscsi_connection_class); |
1928 | if (err) | |
1929 | goto unregister_host_class; | |
1930 | ||
0896b752 AA |
1931 | err = transport_class_register(&iscsi_session_class); |
1932 | if (err) | |
1933 | goto unregister_conn_class; | |
1934 | ||
d82ff9be MC |
1935 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, |
1936 | NULL, THIS_MODULE); | |
0896b752 AA |
1937 | if (!nls) { |
1938 | err = -ENOBUFS; | |
43a145a3 | 1939 | goto unregister_session_class; |
0896b752 AA |
1940 | } |
1941 | ||
d8bf541e MC |
1942 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
1943 | if (!iscsi_eh_timer_workq) | |
1944 | goto release_nls; | |
1945 | ||
43a145a3 | 1946 | return 0; |
0896b752 | 1947 | |
d8bf541e | 1948 | release_nls: |
b7c6ba6e | 1949 | netlink_kernel_release(nls); |
0896b752 AA |
1950 | unregister_session_class: |
1951 | transport_class_unregister(&iscsi_session_class); | |
1952 | unregister_conn_class: | |
1953 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
1954 | unregister_host_class: |
1955 | transport_class_unregister(&iscsi_host_class); | |
d82ff9be MC |
1956 | unregister_endpoint_class: |
1957 | class_unregister(&iscsi_endpoint_class); | |
0896b752 AA |
1958 | unregister_transport_class: |
1959 | class_unregister(&iscsi_transport_class); | |
1960 | return err; | |
1da177e4 LT |
1961 | } |
1962 | ||
1963 | static void __exit iscsi_transport_exit(void) | |
1964 | { | |
d8bf541e | 1965 | destroy_workqueue(iscsi_eh_timer_workq); |
b7c6ba6e | 1966 | netlink_kernel_release(nls); |
0896b752 AA |
1967 | transport_class_unregister(&iscsi_connection_class); |
1968 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 1969 | transport_class_unregister(&iscsi_host_class); |
d82ff9be | 1970 | class_unregister(&iscsi_endpoint_class); |
0896b752 | 1971 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
1972 | } |
1973 | ||
1974 | module_init(iscsi_transport_init); | |
1975 | module_exit(iscsi_transport_exit); | |
1976 | ||
0896b752 AA |
1977 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
1978 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
1979 | "Alex Aizman <itn780@yahoo.com>"); | |
1980 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 1981 | MODULE_LICENSE("GPL"); |
f4246b33 | 1982 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |