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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 { | |
40 | struct scsi_transport_template t; | |
0896b752 AA |
41 | struct iscsi_transport *iscsi_transport; |
42 | struct list_head list; | |
ee959b00 | 43 | struct device dev; |
30a6c652 | 44 | |
ee959b00 | 45 | struct device_attribute *host_attrs[ISCSI_HOST_ATTRS + 1]; |
0896b752 | 46 | struct transport_container conn_cont; |
ee959b00 | 47 | struct device_attribute *conn_attrs[ISCSI_CONN_ATTRS + 1]; |
0896b752 | 48 | struct transport_container session_cont; |
ee959b00 | 49 | struct device_attribute *session_attrs[ISCSI_SESSION_ATTRS + 1]; |
1da177e4 LT |
50 | }; |
51 | ||
41be1444 | 52 | static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ |
d8bf541e | 53 | static struct workqueue_struct *iscsi_eh_timer_workq; |
b5c7a12d | 54 | |
0896b752 AA |
55 | /* |
56 | * list of registered transports and lock that must | |
57 | * be held while accessing list. The iscsi_transport_lock must | |
0b950672 | 58 | * be acquired after the rx_queue_mutex. |
0896b752 AA |
59 | */ |
60 | static LIST_HEAD(iscsi_transports); | |
61 | static DEFINE_SPINLOCK(iscsi_transport_lock); | |
62 | ||
63 | #define to_iscsi_internal(tmpl) \ | |
64 | container_of(tmpl, struct iscsi_internal, t) | |
65 | ||
ee959b00 TJ |
66 | #define dev_to_iscsi_internal(_dev) \ |
67 | container_of(_dev, struct iscsi_internal, dev) | |
0896b752 | 68 | |
ee959b00 | 69 | static void iscsi_transport_release(struct device *dev) |
0896b752 | 70 | { |
ee959b00 | 71 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
0896b752 AA |
72 | kfree(priv); |
73 | } | |
1da177e4 | 74 | |
0896b752 AA |
75 | /* |
76 | * iscsi_transport_class represents the iscsi_transports that are | |
77 | * registered. | |
78 | */ | |
79 | static struct class iscsi_transport_class = { | |
80 | .name = "iscsi_transport", | |
ee959b00 | 81 | .dev_release = iscsi_transport_release, |
0896b752 AA |
82 | }; |
83 | ||
84 | static ssize_t | |
ee959b00 TJ |
85 | show_transport_handle(struct device *dev, struct device_attribute *attr, |
86 | char *buf) | |
0896b752 | 87 | { |
ee959b00 | 88 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
762e2bfa | 89 | return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); |
0896b752 | 90 | } |
ee959b00 | 91 | static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); |
0896b752 AA |
92 | |
93 | #define show_transport_attr(name, format) \ | |
94 | static ssize_t \ | |
ee959b00 TJ |
95 | show_transport_##name(struct device *dev, \ |
96 | struct device_attribute *attr,char *buf) \ | |
0896b752 | 97 | { \ |
ee959b00 | 98 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ |
0896b752 AA |
99 | return sprintf(buf, format"\n", priv->iscsi_transport->name); \ |
100 | } \ | |
ee959b00 | 101 | static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); |
0896b752 AA |
102 | |
103 | show_transport_attr(caps, "0x%x"); | |
0896b752 AA |
104 | |
105 | static struct attribute *iscsi_transport_attrs[] = { | |
ee959b00 TJ |
106 | &dev_attr_handle.attr, |
107 | &dev_attr_caps.attr, | |
0896b752 AA |
108 | NULL, |
109 | }; | |
110 | ||
111 | static struct attribute_group iscsi_transport_group = { | |
112 | .attrs = iscsi_transport_attrs, | |
113 | }; | |
114 | ||
d82ff9be MC |
115 | /* |
116 | * iSCSI endpoint attrs | |
117 | */ | |
118 | #define iscsi_dev_to_endpoint(_dev) \ | |
119 | container_of(_dev, struct iscsi_endpoint, dev) | |
120 | ||
121 | #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ | |
122 | struct device_attribute dev_attr_##_prefix##_##_name = \ | |
123 | __ATTR(_name,_mode,_show,_store) | |
124 | ||
125 | static void iscsi_endpoint_release(struct device *dev) | |
126 | { | |
127 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
128 | kfree(ep); | |
129 | } | |
130 | ||
131 | static struct class iscsi_endpoint_class = { | |
132 | .name = "iscsi_endpoint", | |
133 | .dev_release = iscsi_endpoint_release, | |
134 | }; | |
135 | ||
136 | static ssize_t | |
137 | show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) | |
138 | { | |
139 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
21536062 | 140 | return sprintf(buf, "%llu\n", (unsigned long long) ep->id); |
d82ff9be MC |
141 | } |
142 | static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); | |
143 | ||
144 | static struct attribute *iscsi_endpoint_attrs[] = { | |
145 | &dev_attr_ep_handle.attr, | |
146 | NULL, | |
147 | }; | |
148 | ||
149 | static struct attribute_group iscsi_endpoint_group = { | |
150 | .attrs = iscsi_endpoint_attrs, | |
151 | }; | |
152 | ||
153 | #define ISCSI_MAX_EPID -1 | |
154 | ||
155 | static int iscsi_match_epid(struct device *dev, void *data) | |
156 | { | |
157 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
21536062 | 158 | uint64_t *epid = (uint64_t *) data; |
d82ff9be MC |
159 | |
160 | return *epid == ep->id; | |
161 | } | |
162 | ||
163 | struct iscsi_endpoint * | |
164 | iscsi_create_endpoint(int dd_size) | |
165 | { | |
166 | struct device *dev; | |
167 | struct iscsi_endpoint *ep; | |
21536062 | 168 | uint64_t id; |
d82ff9be MC |
169 | int err; |
170 | ||
171 | for (id = 1; id < ISCSI_MAX_EPID; id++) { | |
695794ae | 172 | dev = class_find_device(&iscsi_endpoint_class, NULL, &id, |
d82ff9be MC |
173 | iscsi_match_epid); |
174 | if (!dev) | |
175 | break; | |
176 | } | |
177 | if (id == ISCSI_MAX_EPID) { | |
178 | printk(KERN_ERR "Too many connections. Max supported %u\n", | |
179 | ISCSI_MAX_EPID - 1); | |
180 | return NULL; | |
181 | } | |
182 | ||
183 | ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); | |
184 | if (!ep) | |
185 | return NULL; | |
186 | ||
187 | ep->id = id; | |
188 | ep->dev.class = &iscsi_endpoint_class; | |
71610f55 | 189 | dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); |
d82ff9be MC |
190 | err = device_register(&ep->dev); |
191 | if (err) | |
192 | goto free_ep; | |
193 | ||
194 | err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); | |
195 | if (err) | |
196 | goto unregister_dev; | |
197 | ||
198 | if (dd_size) | |
199 | ep->dd_data = &ep[1]; | |
200 | return ep; | |
201 | ||
202 | unregister_dev: | |
203 | device_unregister(&ep->dev); | |
204 | return NULL; | |
205 | ||
206 | free_ep: | |
207 | kfree(ep); | |
208 | return NULL; | |
209 | } | |
210 | EXPORT_SYMBOL_GPL(iscsi_create_endpoint); | |
211 | ||
212 | void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) | |
213 | { | |
214 | sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); | |
215 | device_unregister(&ep->dev); | |
216 | } | |
217 | EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); | |
218 | ||
219 | struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) | |
220 | { | |
f80f868e | 221 | struct iscsi_endpoint *ep; |
d82ff9be MC |
222 | struct device *dev; |
223 | ||
695794ae | 224 | dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, |
d82ff9be MC |
225 | iscsi_match_epid); |
226 | if (!dev) | |
227 | return NULL; | |
228 | ||
f80f868e MC |
229 | ep = iscsi_dev_to_endpoint(dev); |
230 | /* | |
231 | * we can drop this now because the interface will prevent | |
232 | * removals and lookups from racing. | |
233 | */ | |
234 | put_device(dev); | |
235 | return ep; | |
d82ff9be MC |
236 | } |
237 | EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); | |
238 | ||
30a6c652 | 239 | static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
ee959b00 | 240 | struct device *cdev) |
30a6c652 MC |
241 | { |
242 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 243 | struct iscsi_cls_host *ihost = shost->shost_data; |
30a6c652 MC |
244 | |
245 | memset(ihost, 0, sizeof(*ihost)); | |
8aae18ad | 246 | atomic_set(&ihost->nr_scans, 0); |
7970634b | 247 | mutex_init(&ihost->mutex); |
30a6c652 MC |
248 | return 0; |
249 | } | |
250 | ||
251 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
252 | "iscsi_host", | |
253 | iscsi_setup_host, | |
06d25af4 | 254 | NULL, |
30a6c652 MC |
255 | NULL); |
256 | ||
0896b752 AA |
257 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
258 | "iscsi_session", | |
1da177e4 LT |
259 | NULL, |
260 | NULL, | |
261 | NULL); | |
262 | ||
0896b752 AA |
263 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
264 | "iscsi_connection", | |
1da177e4 LT |
265 | NULL, |
266 | NULL, | |
267 | NULL); | |
0896b752 AA |
268 | |
269 | static struct sock *nls; | |
0b950672 | 270 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 271 | |
7b7232f3 MC |
272 | static LIST_HEAD(sesslist); |
273 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
274 | static LIST_HEAD(connlist); |
275 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 276 | |
b5c7a12d MC |
277 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
278 | { | |
279 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
280 | return sess->sid; | |
281 | } | |
282 | ||
283 | /* | |
284 | * Returns the matching session to a given sid | |
285 | */ | |
286 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
287 | { |
288 | unsigned long flags; | |
289 | struct iscsi_cls_session *sess; | |
290 | ||
291 | spin_lock_irqsave(&sesslock, flags); | |
292 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 293 | if (sess->sid == sid) { |
7b7232f3 MC |
294 | spin_unlock_irqrestore(&sesslock, flags); |
295 | return sess; | |
296 | } | |
297 | } | |
298 | spin_unlock_irqrestore(&sesslock, flags); | |
299 | return NULL; | |
300 | } | |
301 | ||
b5c7a12d MC |
302 | /* |
303 | * Returns the matching connection to a given sid / cid tuple | |
304 | */ | |
305 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
306 | { |
307 | unsigned long flags; | |
308 | struct iscsi_cls_conn *conn; | |
309 | ||
310 | spin_lock_irqsave(&connlock, flags); | |
311 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 312 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
313 | spin_unlock_irqrestore(&connlock, flags); |
314 | return conn; | |
315 | } | |
316 | } | |
317 | spin_unlock_irqrestore(&connlock, flags); | |
318 | return NULL; | |
319 | } | |
320 | ||
7b8631b5 MC |
321 | /* |
322 | * The following functions can be used by LLDs that allocate | |
323 | * their own scsi_hosts or by software iscsi LLDs | |
324 | */ | |
6eabafbe MC |
325 | static struct { |
326 | int value; | |
327 | char *name; | |
328 | } iscsi_session_state_names[] = { | |
329 | { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, | |
330 | { ISCSI_SESSION_FAILED, "FAILED" }, | |
331 | { ISCSI_SESSION_FREE, "FREE" }, | |
332 | }; | |
333 | ||
3b0f208a | 334 | static const char *iscsi_session_state_name(int state) |
6eabafbe MC |
335 | { |
336 | int i; | |
337 | char *name = NULL; | |
338 | ||
339 | for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { | |
340 | if (iscsi_session_state_names[i].value == state) { | |
341 | name = iscsi_session_state_names[i].name; | |
342 | break; | |
343 | } | |
344 | } | |
345 | return name; | |
346 | } | |
347 | ||
348 | int iscsi_session_chkready(struct iscsi_cls_session *session) | |
349 | { | |
350 | unsigned long flags; | |
351 | int err; | |
352 | ||
353 | spin_lock_irqsave(&session->lock, flags); | |
354 | switch (session->state) { | |
355 | case ISCSI_SESSION_LOGGED_IN: | |
356 | err = 0; | |
357 | break; | |
358 | case ISCSI_SESSION_FAILED: | |
9a1a69a1 | 359 | err = DID_IMM_RETRY << 16; |
6eabafbe MC |
360 | break; |
361 | case ISCSI_SESSION_FREE: | |
56d7fcfa | 362 | err = DID_TRANSPORT_FAILFAST << 16; |
6eabafbe MC |
363 | break; |
364 | default: | |
365 | err = DID_NO_CONNECT << 16; | |
366 | break; | |
367 | } | |
368 | spin_unlock_irqrestore(&session->lock, flags); | |
369 | return err; | |
370 | } | |
371 | EXPORT_SYMBOL_GPL(iscsi_session_chkready); | |
372 | ||
7b8631b5 MC |
373 | static void iscsi_session_release(struct device *dev) |
374 | { | |
375 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 376 | struct Scsi_Host *shost; |
0896b752 | 377 | |
7b8631b5 MC |
378 | shost = iscsi_session_to_shost(session); |
379 | scsi_host_put(shost); | |
380 | kfree(session); | |
7b8631b5 | 381 | } |
0896b752 | 382 | |
7b8631b5 MC |
383 | static int iscsi_is_session_dev(const struct device *dev) |
384 | { | |
385 | return dev->release == iscsi_session_release; | |
386 | } | |
0896b752 | 387 | |
a4804cd6 MC |
388 | static int iscsi_iter_session_fn(struct device *dev, void *data) |
389 | { | |
390 | void (* fn) (struct iscsi_cls_session *) = data; | |
391 | ||
392 | if (!iscsi_is_session_dev(dev)) | |
393 | return 0; | |
394 | fn(iscsi_dev_to_session(dev)); | |
395 | return 0; | |
396 | } | |
397 | ||
398 | void iscsi_host_for_each_session(struct Scsi_Host *shost, | |
399 | void (*fn)(struct iscsi_cls_session *)) | |
400 | { | |
401 | device_for_each_child(&shost->shost_gendev, fn, | |
402 | iscsi_iter_session_fn); | |
403 | } | |
404 | EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); | |
405 | ||
8aae18ad MC |
406 | /** |
407 | * iscsi_scan_finished - helper to report when running scans are done | |
408 | * @shost: scsi host | |
409 | * @time: scan run time | |
410 | * | |
411 | * This function can be used by drives like qla4xxx to report to the scsi | |
412 | * layer when the scans it kicked off at module load time are done. | |
413 | */ | |
414 | int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
415 | { | |
32c6e1b9 | 416 | struct iscsi_cls_host *ihost = shost->shost_data; |
8aae18ad MC |
417 | /* |
418 | * qla4xxx will have kicked off some session unblocks before calling | |
419 | * scsi_scan_host, so just wait for them to complete. | |
420 | */ | |
421 | return !atomic_read(&ihost->nr_scans); | |
422 | } | |
423 | EXPORT_SYMBOL_GPL(iscsi_scan_finished); | |
424 | ||
7970634b MC |
425 | struct iscsi_scan_data { |
426 | unsigned int channel; | |
427 | unsigned int id; | |
428 | unsigned int lun; | |
429 | }; | |
430 | ||
431 | static int iscsi_user_scan_session(struct device *dev, void *data) | |
30a6c652 | 432 | { |
7970634b | 433 | struct iscsi_scan_data *scan_data = data; |
30a6c652 | 434 | struct iscsi_cls_session *session; |
7970634b MC |
435 | struct Scsi_Host *shost; |
436 | struct iscsi_cls_host *ihost; | |
437 | unsigned long flags; | |
438 | unsigned int id; | |
439 | ||
440 | if (!iscsi_is_session_dev(dev)) | |
441 | return 0; | |
442 | ||
443 | session = iscsi_dev_to_session(dev); | |
444 | shost = iscsi_session_to_shost(session); | |
445 | ihost = shost->shost_data; | |
30a6c652 MC |
446 | |
447 | mutex_lock(&ihost->mutex); | |
7970634b MC |
448 | spin_lock_irqsave(&session->lock, flags); |
449 | if (session->state != ISCSI_SESSION_LOGGED_IN) { | |
450 | spin_unlock_irqrestore(&session->lock, flags); | |
451 | mutex_unlock(&ihost->mutex); | |
452 | return 0; | |
30a6c652 | 453 | } |
7970634b MC |
454 | id = session->target_id; |
455 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 456 | |
7970634b MC |
457 | if (id != ISCSI_MAX_TARGET) { |
458 | if ((scan_data->channel == SCAN_WILD_CARD || | |
459 | scan_data->channel == 0) && | |
460 | (scan_data->id == SCAN_WILD_CARD || | |
461 | scan_data->id == id)) | |
462 | scsi_scan_target(&session->dev, 0, id, | |
463 | scan_data->lun, 1); | |
464 | } | |
465 | mutex_unlock(&ihost->mutex); | |
30a6c652 MC |
466 | return 0; |
467 | } | |
468 | ||
7970634b MC |
469 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
470 | uint id, uint lun) | |
471 | { | |
472 | struct iscsi_scan_data scan_data; | |
473 | ||
474 | scan_data.channel = channel; | |
475 | scan_data.id = id; | |
476 | scan_data.lun = lun; | |
477 | ||
478 | return device_for_each_child(&shost->shost_gendev, &scan_data, | |
479 | iscsi_user_scan_session); | |
480 | } | |
481 | ||
bd976f62 MC |
482 | static void iscsi_scan_session(struct work_struct *work) |
483 | { | |
484 | struct iscsi_cls_session *session = | |
485 | container_of(work, struct iscsi_cls_session, scan_work); | |
8aae18ad | 486 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 487 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 488 | struct iscsi_scan_data scan_data; |
bd976f62 | 489 | |
7970634b MC |
490 | scan_data.channel = 0; |
491 | scan_data.id = SCAN_WILD_CARD; | |
492 | scan_data.lun = SCAN_WILD_CARD; | |
bd976f62 | 493 | |
7970634b | 494 | iscsi_user_scan_session(&session->dev, &scan_data); |
8aae18ad | 495 | atomic_dec(&ihost->nr_scans); |
bd976f62 MC |
496 | } |
497 | ||
c4028958 | 498 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 499 | { |
c4028958 DH |
500 | struct iscsi_cls_session *session = |
501 | container_of(work, struct iscsi_cls_session, | |
502 | recovery_work.work); | |
6eabafbe | 503 | unsigned long flags; |
30a6c652 | 504 | |
322d739d MC |
505 | iscsi_cls_session_printk(KERN_INFO, session, |
506 | "session recovery timed out after %d secs\n", | |
507 | session->recovery_tmo); | |
30a6c652 | 508 | |
6eabafbe MC |
509 | spin_lock_irqsave(&session->lock, flags); |
510 | switch (session->state) { | |
511 | case ISCSI_SESSION_FAILED: | |
512 | session->state = ISCSI_SESSION_FREE; | |
513 | break; | |
514 | case ISCSI_SESSION_LOGGED_IN: | |
515 | case ISCSI_SESSION_FREE: | |
516 | /* we raced with the unblock's flush */ | |
517 | spin_unlock_irqrestore(&session->lock, flags); | |
518 | return; | |
519 | } | |
520 | spin_unlock_irqrestore(&session->lock, flags); | |
521 | ||
30a6c652 MC |
522 | if (session->transport->session_recovery_timedout) |
523 | session->transport->session_recovery_timedout(session); | |
524 | ||
525 | scsi_target_unblock(&session->dev); | |
526 | } | |
527 | ||
45ab33b6 | 528 | static void __iscsi_unblock_session(struct work_struct *work) |
6eabafbe | 529 | { |
45ab33b6 MC |
530 | struct iscsi_cls_session *session = |
531 | container_of(work, struct iscsi_cls_session, | |
532 | unblock_work); | |
bd976f62 | 533 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 534 | struct iscsi_cls_host *ihost = shost->shost_data; |
6eabafbe MC |
535 | unsigned long flags; |
536 | ||
45ab33b6 MC |
537 | /* |
538 | * The recovery and unblock work get run from the same workqueue, | |
539 | * so try to cancel it if it was going to run after this unblock. | |
540 | */ | |
541 | cancel_delayed_work(&session->recovery_work); | |
6eabafbe MC |
542 | spin_lock_irqsave(&session->lock, flags); |
543 | session->state = ISCSI_SESSION_LOGGED_IN; | |
544 | spin_unlock_irqrestore(&session->lock, flags); | |
45ab33b6 MC |
545 | /* start IO */ |
546 | scsi_target_unblock(&session->dev); | |
8aae18ad MC |
547 | /* |
548 | * Only do kernel scanning if the driver is properly hooked into | |
549 | * the async scanning code (drivers like iscsi_tcp do login and | |
550 | * scanning from userspace). | |
551 | */ | |
552 | if (shost->hostt->scan_finished) { | |
06d25af4 | 553 | if (scsi_queue_work(shost, &session->scan_work)) |
8aae18ad MC |
554 | atomic_inc(&ihost->nr_scans); |
555 | } | |
6eabafbe | 556 | } |
45ab33b6 MC |
557 | |
558 | /** | |
559 | * iscsi_unblock_session - set a session as logged in and start IO. | |
560 | * @session: iscsi session | |
561 | * | |
562 | * Mark a session as ready to accept IO. | |
563 | */ | |
564 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
565 | { | |
566 | queue_work(iscsi_eh_timer_workq, &session->unblock_work); | |
567 | /* | |
568 | * make sure all the events have completed before tell the driver | |
569 | * it is safe | |
570 | */ | |
571 | flush_workqueue(iscsi_eh_timer_workq); | |
572 | } | |
30a6c652 MC |
573 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
574 | ||
45ab33b6 | 575 | static void __iscsi_block_session(struct work_struct *work) |
30a6c652 | 576 | { |
45ab33b6 MC |
577 | struct iscsi_cls_session *session = |
578 | container_of(work, struct iscsi_cls_session, | |
579 | block_work); | |
6eabafbe MC |
580 | unsigned long flags; |
581 | ||
582 | spin_lock_irqsave(&session->lock, flags); | |
583 | session->state = ISCSI_SESSION_FAILED; | |
584 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 585 | scsi_target_block(&session->dev); |
d8bf541e MC |
586 | queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work, |
587 | session->recovery_tmo * HZ); | |
30a6c652 | 588 | } |
45ab33b6 MC |
589 | |
590 | void iscsi_block_session(struct iscsi_cls_session *session) | |
591 | { | |
592 | queue_work(iscsi_eh_timer_workq, &session->block_work); | |
593 | } | |
30a6c652 MC |
594 | EXPORT_SYMBOL_GPL(iscsi_block_session); |
595 | ||
26974789 MC |
596 | static void __iscsi_unbind_session(struct work_struct *work) |
597 | { | |
598 | struct iscsi_cls_session *session = | |
599 | container_of(work, struct iscsi_cls_session, | |
600 | unbind_work); | |
601 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 602 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 603 | unsigned long flags; |
26974789 MC |
604 | |
605 | /* Prevent new scans and make sure scanning is not in progress */ | |
606 | mutex_lock(&ihost->mutex); | |
7970634b MC |
607 | spin_lock_irqsave(&session->lock, flags); |
608 | if (session->target_id == ISCSI_MAX_TARGET) { | |
609 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
610 | mutex_unlock(&ihost->mutex); |
611 | return; | |
612 | } | |
7970634b MC |
613 | session->target_id = ISCSI_MAX_TARGET; |
614 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
615 | mutex_unlock(&ihost->mutex); |
616 | ||
617 | scsi_remove_target(&session->dev); | |
618 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
619 | } | |
620 | ||
7b8631b5 | 621 | struct iscsi_cls_session * |
5d91e209 MC |
622 | iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
623 | int dd_size) | |
7b8631b5 MC |
624 | { |
625 | struct iscsi_cls_session *session; | |
7b8631b5 | 626 | |
5d91e209 | 627 | session = kzalloc(sizeof(*session) + dd_size, |
b5c7a12d | 628 | GFP_KERNEL); |
7b8631b5 | 629 | if (!session) |
f53a88da MC |
630 | return NULL; |
631 | ||
7b8631b5 | 632 | session->transport = transport; |
30a6c652 | 633 | session->recovery_tmo = 120; |
6eabafbe | 634 | session->state = ISCSI_SESSION_FREE; |
c4028958 | 635 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 | 636 | INIT_LIST_HEAD(&session->sess_list); |
45ab33b6 MC |
637 | INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
638 | INIT_WORK(&session->block_work, __iscsi_block_session); | |
26974789 | 639 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
bd976f62 | 640 | INIT_WORK(&session->scan_work, iscsi_scan_session); |
6eabafbe | 641 | spin_lock_init(&session->lock); |
7b8631b5 | 642 | |
6a8a0d36 MC |
643 | /* this is released in the dev's release function */ |
644 | scsi_host_get(shost); | |
8434aa8b MC |
645 | session->dev.parent = &shost->shost_gendev; |
646 | session->dev.release = iscsi_session_release; | |
647 | device_initialize(&session->dev); | |
5d91e209 | 648 | if (dd_size) |
b5c7a12d | 649 | session->dd_data = &session[1]; |
8434aa8b MC |
650 | return session; |
651 | } | |
652 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
653 | ||
7970634b MC |
654 | static int iscsi_get_next_target_id(struct device *dev, void *data) |
655 | { | |
656 | struct iscsi_cls_session *session; | |
657 | unsigned long flags; | |
658 | int err = 0; | |
659 | ||
660 | if (!iscsi_is_session_dev(dev)) | |
661 | return 0; | |
662 | ||
663 | session = iscsi_dev_to_session(dev); | |
664 | spin_lock_irqsave(&session->lock, flags); | |
665 | if (*((unsigned int *) data) == session->target_id) | |
666 | err = -EEXIST; | |
667 | spin_unlock_irqrestore(&session->lock, flags); | |
668 | return err; | |
669 | } | |
670 | ||
6a8a0d36 | 671 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
672 | { |
673 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 674 | struct iscsi_cls_host *ihost; |
26974789 | 675 | unsigned long flags; |
7970634b | 676 | unsigned int id = target_id; |
8434aa8b | 677 | int err; |
b5c7a12d | 678 | |
30a6c652 | 679 | ihost = shost->shost_data; |
41be1444 | 680 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
7970634b MC |
681 | |
682 | if (id == ISCSI_MAX_TARGET) { | |
683 | for (id = 0; id < ISCSI_MAX_TARGET; id++) { | |
684 | err = device_for_each_child(&shost->shost_gendev, &id, | |
685 | iscsi_get_next_target_id); | |
686 | if (!err) | |
687 | break; | |
688 | } | |
689 | ||
690 | if (id == ISCSI_MAX_TARGET) { | |
691 | iscsi_cls_session_printk(KERN_ERR, session, | |
692 | "Too many iscsi targets. Max " | |
693 | "number of targets is %d.\n", | |
694 | ISCSI_MAX_TARGET - 1); | |
24add1c4 | 695 | err = -EOVERFLOW; |
7970634b MC |
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 |
43514774 | 941 | iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) |
53cb8a1f | 942 | { |
43514774 | 943 | return nlmsg_multicast(nls, skb, 0, group, gfp); |
1da177e4 | 944 | } |
1da177e4 | 945 | |
7b7232f3 | 946 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 947 | char *data, uint32_t data_size) |
1da177e4 | 948 | { |
0896b752 AA |
949 | struct nlmsghdr *nlh; |
950 | struct sk_buff *skb; | |
951 | struct iscsi_uevent *ev; | |
0896b752 | 952 | char *pdu; |
790f39a2 | 953 | struct iscsi_internal *priv; |
0896b752 AA |
954 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
955 | data_size); | |
956 | ||
790f39a2 MC |
957 | priv = iscsi_if_transport_lookup(conn->transport); |
958 | if (!priv) | |
959 | return -EINVAL; | |
960 | ||
43a145a3 | 961 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 962 | if (!skb) { |
e5bd7b54 | 963 | iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); |
322d739d MC |
964 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
965 | "control PDU: OOM\n"); | |
0896b752 AA |
966 | return -ENOMEM; |
967 | } | |
1da177e4 | 968 | |
43514774 | 969 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
970 | ev = NLMSG_DATA(nlh); |
971 | memset(ev, 0, sizeof(*ev)); | |
972 | ev->transport_handle = iscsi_handle(conn->transport); | |
973 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
974 | ev->r.recv_req.cid = conn->cid; |
975 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
976 | pdu = (char*)ev + sizeof(*ev); |
977 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
978 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 979 | |
43514774 | 980 | return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
1da177e4 | 981 | } |
0896b752 | 982 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 983 | |
43514774 MC |
984 | int iscsi_offload_mesg(struct Scsi_Host *shost, |
985 | struct iscsi_transport *transport, uint32_t type, | |
986 | char *data, uint16_t data_size) | |
987 | { | |
988 | struct nlmsghdr *nlh; | |
989 | struct sk_buff *skb; | |
990 | struct iscsi_uevent *ev; | |
991 | int len = NLMSG_SPACE(sizeof(*ev) + data_size); | |
992 | ||
a541f840 | 993 | skb = alloc_skb(len, GFP_ATOMIC); |
43514774 MC |
994 | if (!skb) { |
995 | printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); | |
996 | return -ENOMEM; | |
997 | } | |
998 | ||
999 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); | |
1000 | ev = NLMSG_DATA(nlh); | |
1001 | memset(ev, 0, sizeof(*ev)); | |
1002 | ev->type = type; | |
1003 | ev->transport_handle = iscsi_handle(transport); | |
1004 | switch (type) { | |
1005 | case ISCSI_KEVENT_PATH_REQ: | |
1006 | ev->r.req_path.host_no = shost->host_no; | |
1007 | break; | |
1008 | case ISCSI_KEVENT_IF_DOWN: | |
1009 | ev->r.notify_if_down.host_no = shost->host_no; | |
1010 | break; | |
1011 | } | |
1012 | ||
1013 | memcpy((char *)ev + sizeof(*ev), data, data_size); | |
1014 | ||
a541f840 | 1015 | return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); |
43514774 MC |
1016 | } |
1017 | EXPORT_SYMBOL_GPL(iscsi_offload_mesg); | |
1018 | ||
e5bd7b54 | 1019 | void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 1020 | { |
0896b752 AA |
1021 | struct nlmsghdr *nlh; |
1022 | struct sk_buff *skb; | |
1023 | struct iscsi_uevent *ev; | |
790f39a2 | 1024 | struct iscsi_internal *priv; |
0896b752 AA |
1025 | int len = NLMSG_SPACE(sizeof(*ev)); |
1026 | ||
790f39a2 MC |
1027 | priv = iscsi_if_transport_lookup(conn->transport); |
1028 | if (!priv) | |
1029 | return; | |
1030 | ||
43a145a3 | 1031 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1032 | if (!skb) { |
322d739d MC |
1033 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
1034 | "conn error (%d)\n", error); | |
0896b752 AA |
1035 | return; |
1036 | } | |
1037 | ||
43514774 | 1038 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1039 | ev = NLMSG_DATA(nlh); |
1040 | ev->transport_handle = iscsi_handle(conn->transport); | |
1041 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 1042 | ev->r.connerror.error = error; |
b5c7a12d MC |
1043 | ev->r.connerror.cid = conn->cid; |
1044 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 1045 | |
43514774 | 1046 | iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
1da177e4 | 1047 | |
322d739d MC |
1048 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
1049 | error); | |
0896b752 | 1050 | } |
e5bd7b54 | 1051 | EXPORT_SYMBOL_GPL(iscsi_conn_error_event); |
0896b752 AA |
1052 | |
1053 | static int | |
43514774 MC |
1054 | iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi, |
1055 | void *payload, int size) | |
0896b752 AA |
1056 | { |
1057 | struct sk_buff *skb; | |
1058 | struct nlmsghdr *nlh; | |
1059 | int len = NLMSG_SPACE(size); | |
1060 | int flags = multi ? NLM_F_MULTI : 0; | |
1061 | int t = done ? NLMSG_DONE : type; | |
1062 | ||
43a145a3 | 1063 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
1064 | if (!skb) { |
1065 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
1066 | return -ENOMEM; | |
1067 | } | |
0896b752 | 1068 | |
43514774 | 1069 | nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1070 | nlh->nlmsg_flags = flags; |
1071 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43514774 | 1072 | return iscsi_multicast_skb(skb, group, GFP_ATOMIC); |
1da177e4 | 1073 | } |
1da177e4 | 1074 | |
7b8631b5 | 1075 | static int |
5b940adf | 1076 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
1077 | { |
1078 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1079 | struct iscsi_stats *stats; | |
1080 | struct sk_buff *skbstat; | |
1081 | struct iscsi_cls_conn *conn; | |
1082 | struct nlmsghdr *nlhstat; | |
1083 | struct iscsi_uevent *evstat; | |
790f39a2 | 1084 | struct iscsi_internal *priv; |
7b8631b5 MC |
1085 | int len = NLMSG_SPACE(sizeof(*ev) + |
1086 | sizeof(struct iscsi_stats) + | |
1087 | sizeof(struct iscsi_stats_custom) * | |
1088 | ISCSI_STATS_CUSTOM_MAX); | |
1089 | int err = 0; | |
0896b752 | 1090 | |
790f39a2 MC |
1091 | priv = iscsi_if_transport_lookup(transport); |
1092 | if (!priv) | |
1093 | return -EINVAL; | |
1094 | ||
b5c7a12d | 1095 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
1096 | if (!conn) |
1097 | return -EEXIST; | |
0896b752 | 1098 | |
7b8631b5 MC |
1099 | do { |
1100 | int actual_size; | |
0896b752 | 1101 | |
43a145a3 | 1102 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 | 1103 | if (!skbstat) { |
322d739d MC |
1104 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
1105 | "deliver stats: OOM\n"); | |
7b8631b5 MC |
1106 | return -ENOMEM; |
1107 | } | |
1108 | ||
43514774 | 1109 | nlhstat = __nlmsg_put(skbstat, 0, 0, 0, |
7b8631b5 MC |
1110 | (len - sizeof(*nlhstat)), 0); |
1111 | evstat = NLMSG_DATA(nlhstat); | |
1112 | memset(evstat, 0, sizeof(*evstat)); | |
1113 | evstat->transport_handle = iscsi_handle(conn->transport); | |
1114 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
1115 | evstat->u.get_stats.cid = |
1116 | ev->u.get_stats.cid; | |
1117 | evstat->u.get_stats.sid = | |
1118 | ev->u.get_stats.sid; | |
7b8631b5 MC |
1119 | stats = (struct iscsi_stats *) |
1120 | ((char*)evstat + sizeof(*evstat)); | |
1121 | memset(stats, 0, sizeof(*stats)); | |
1122 | ||
7b7232f3 | 1123 | transport->get_stats(conn, stats); |
7b8631b5 MC |
1124 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
1125 | sizeof(struct iscsi_stats) + | |
1126 | sizeof(struct iscsi_stats_custom) * | |
1127 | stats->custom_length); | |
1128 | actual_size -= sizeof(*nlhstat); | |
1129 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 1130 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
1131 | nlhstat->nlmsg_len = actual_size; |
1132 | ||
43514774 MC |
1133 | err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, |
1134 | GFP_ATOMIC); | |
7b8631b5 MC |
1135 | } while (err < 0 && err != -ECONNREFUSED); |
1136 | ||
1137 | return err; | |
0896b752 AA |
1138 | } |
1139 | ||
53cb8a1f | 1140 | /** |
26974789 MC |
1141 | * iscsi_session_event - send session destr. completion event |
1142 | * @session: iscsi class session | |
1143 | * @event: type of event | |
eb44820c | 1144 | */ |
26974789 MC |
1145 | int iscsi_session_event(struct iscsi_cls_session *session, |
1146 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
1147 | { |
1148 | struct iscsi_internal *priv; | |
53cb8a1f MC |
1149 | struct Scsi_Host *shost; |
1150 | struct iscsi_uevent *ev; | |
1151 | struct sk_buff *skb; | |
1152 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
1153 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
1154 | ||
26974789 | 1155 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
1156 | if (!priv) |
1157 | return -EINVAL; | |
53cb8a1f MC |
1158 | shost = iscsi_session_to_shost(session); |
1159 | ||
43a145a3 | 1160 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 1161 | if (!skb) { |
322d739d MC |
1162 | iscsi_cls_session_printk(KERN_ERR, session, |
1163 | "Cannot notify userspace of session " | |
1164 | "event %u\n", event); | |
53cb8a1f MC |
1165 | return -ENOMEM; |
1166 | } | |
1167 | ||
43514774 | 1168 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
53cb8a1f | 1169 | ev = NLMSG_DATA(nlh); |
26974789 | 1170 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 1171 | |
26974789 MC |
1172 | ev->type = event; |
1173 | switch (event) { | |
1174 | case ISCSI_KEVENT_DESTROY_SESSION: | |
1175 | ev->r.d_session.host_no = shost->host_no; | |
1176 | ev->r.d_session.sid = session->sid; | |
1177 | break; | |
1178 | case ISCSI_KEVENT_CREATE_SESSION: | |
1179 | ev->r.c_session_ret.host_no = shost->host_no; | |
1180 | ev->r.c_session_ret.sid = session->sid; | |
1181 | break; | |
1182 | case ISCSI_KEVENT_UNBIND_SESSION: | |
1183 | ev->r.unbind_session.host_no = shost->host_no; | |
1184 | ev->r.unbind_session.sid = session->sid; | |
1185 | break; | |
1186 | default: | |
322d739d MC |
1187 | iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
1188 | "%u.\n", event); | |
26974789 | 1189 | kfree_skb(skb); |
53cb8a1f | 1190 | return -EINVAL; |
53cb8a1f MC |
1191 | } |
1192 | ||
53cb8a1f MC |
1193 | /* |
1194 | * this will occur if the daemon is not up, so we just warn | |
1195 | * the user and when the daemon is restarted it will handle it | |
1196 | */ | |
43514774 | 1197 | rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); |
ff491a73 | 1198 | if (rc == -ESRCH) |
322d739d MC |
1199 | iscsi_cls_session_printk(KERN_ERR, session, |
1200 | "Cannot notify userspace of session " | |
1201 | "event %u. Check iscsi daemon\n", | |
1202 | event); | |
53cb8a1f MC |
1203 | return rc; |
1204 | } | |
26974789 | 1205 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 1206 | |
0896b752 | 1207 | static int |
d82ff9be MC |
1208 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, |
1209 | struct iscsi_uevent *ev, uint32_t initial_cmdsn, | |
40753caa | 1210 | uint16_t cmds_max, uint16_t queue_depth) |
0896b752 AA |
1211 | { |
1212 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 1213 | struct iscsi_cls_session *session; |
5e7facb7 | 1214 | struct Scsi_Host *shost; |
0896b752 | 1215 | |
d82ff9be | 1216 | session = transport->create_session(ep, cmds_max, queue_depth, |
5e7facb7 | 1217 | initial_cmdsn); |
7b7232f3 | 1218 | if (!session) |
7b8631b5 | 1219 | return -ENOMEM; |
0896b752 | 1220 | |
5e7facb7 MC |
1221 | shost = iscsi_session_to_shost(session); |
1222 | ev->r.c_session_ret.host_no = shost->host_no; | |
b5c7a12d | 1223 | ev->r.c_session_ret.sid = session->sid; |
0896b752 | 1224 | return 0; |
0896b752 AA |
1225 | } |
1226 | ||
1227 | static int | |
7b7232f3 | 1228 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 1229 | { |
7b8631b5 | 1230 | struct iscsi_cls_conn *conn; |
7b7232f3 | 1231 | struct iscsi_cls_session *session; |
7b8631b5 | 1232 | |
b5c7a12d MC |
1233 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
1234 | if (!session) { | |
322d739d | 1235 | printk(KERN_ERR "iscsi: invalid session %d.\n", |
b5c7a12d | 1236 | ev->u.c_conn.sid); |
7b8631b5 | 1237 | return -EINVAL; |
b5c7a12d | 1238 | } |
0896b752 | 1239 | |
7b7232f3 | 1240 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d | 1241 | if (!conn) { |
322d739d MC |
1242 | iscsi_cls_session_printk(KERN_ERR, session, |
1243 | "couldn't create a new connection."); | |
7b7232f3 | 1244 | return -ENOMEM; |
b5c7a12d | 1245 | } |
0896b752 | 1246 | |
b5c7a12d MC |
1247 | ev->r.c_conn_ret.sid = session->sid; |
1248 | ev->r.c_conn_ret.cid = conn->cid; | |
0896b752 | 1249 | return 0; |
1da177e4 LT |
1250 | } |
1251 | ||
0896b752 AA |
1252 | static int |
1253 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1254 | { | |
7b8631b5 | 1255 | struct iscsi_cls_conn *conn; |
0896b752 | 1256 | |
b5c7a12d | 1257 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 1258 | if (!conn) |
7b8631b5 | 1259 | return -EINVAL; |
0896b752 | 1260 | |
7b8631b5 MC |
1261 | if (transport->destroy_conn) |
1262 | transport->destroy_conn(conn); | |
7b8631b5 | 1263 | return 0; |
0896b752 AA |
1264 | } |
1265 | ||
fd7255f5 MC |
1266 | static int |
1267 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1268 | { | |
1269 | char *data = (char*)ev + sizeof(*ev); | |
1270 | struct iscsi_cls_conn *conn; | |
1271 | struct iscsi_cls_session *session; | |
a54a52ca | 1272 | int err = 0, value = 0; |
fd7255f5 MC |
1273 | |
1274 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
1275 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
1276 | if (!conn || !session) | |
1277 | return -EINVAL; | |
1278 | ||
1279 | switch (ev->u.set_param.param) { | |
30a6c652 | 1280 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 1281 | sscanf(data, "%d", &value); |
30a6c652 MC |
1282 | if (value != 0) |
1283 | session->recovery_tmo = value; | |
1284 | break; | |
fd7255f5 | 1285 | default: |
a54a52ca MC |
1286 | err = transport->set_param(conn, ev->u.set_param.param, |
1287 | data, ev->u.set_param.len); | |
fd7255f5 MC |
1288 | } |
1289 | ||
1290 | return err; | |
1291 | } | |
1292 | ||
10eb0f01 MC |
1293 | static int iscsi_if_ep_connect(struct iscsi_transport *transport, |
1294 | struct iscsi_uevent *ev, int msg_type) | |
1295 | { | |
1296 | struct iscsi_endpoint *ep; | |
1297 | struct sockaddr *dst_addr; | |
1298 | struct Scsi_Host *shost = NULL; | |
1299 | int non_blocking, err = 0; | |
1300 | ||
1301 | if (!transport->ep_connect) | |
1302 | return -EINVAL; | |
1303 | ||
1304 | if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { | |
1305 | shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); | |
1306 | if (!shost) { | |
1307 | printk(KERN_ERR "ep connect failed. Could not find " | |
1308 | "host no %u\n", | |
1309 | ev->u.ep_connect_through_host.host_no); | |
1310 | return -ENODEV; | |
1311 | } | |
1312 | non_blocking = ev->u.ep_connect_through_host.non_blocking; | |
1313 | } else | |
1314 | non_blocking = ev->u.ep_connect.non_blocking; | |
1315 | ||
1316 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
1317 | ep = transport->ep_connect(shost, dst_addr, non_blocking); | |
1318 | if (IS_ERR(ep)) { | |
1319 | err = PTR_ERR(ep); | |
1320 | goto release_host; | |
1321 | } | |
1322 | ||
1323 | ev->r.ep_connect_ret.handle = ep->id; | |
1324 | release_host: | |
1325 | if (shost) | |
1326 | scsi_host_put(shost); | |
1327 | return err; | |
1328 | } | |
1329 | ||
264faaaa OG |
1330 | static int |
1331 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
1332 | struct iscsi_uevent *ev, int msg_type) | |
1333 | { | |
d82ff9be | 1334 | struct iscsi_endpoint *ep; |
264faaaa OG |
1335 | int rc = 0; |
1336 | ||
1337 | switch (msg_type) { | |
10eb0f01 | 1338 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: |
264faaaa | 1339 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
10eb0f01 | 1340 | rc = iscsi_if_ep_connect(transport, ev, msg_type); |
264faaaa OG |
1341 | break; |
1342 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1343 | if (!transport->ep_poll) | |
1344 | return -EINVAL; | |
1345 | ||
d82ff9be MC |
1346 | ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); |
1347 | if (!ep) | |
1348 | return -EINVAL; | |
1349 | ||
1350 | ev->r.retcode = transport->ep_poll(ep, | |
264faaaa OG |
1351 | ev->u.ep_poll.timeout_ms); |
1352 | break; | |
1353 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
1354 | if (!transport->ep_disconnect) | |
1355 | return -EINVAL; | |
1356 | ||
d82ff9be MC |
1357 | ep = iscsi_lookup_endpoint(ev->u.ep_disconnect.ep_handle); |
1358 | if (!ep) | |
1359 | return -EINVAL; | |
1360 | ||
1361 | transport->ep_disconnect(ep); | |
264faaaa OG |
1362 | break; |
1363 | } | |
1364 | return rc; | |
1365 | } | |
1366 | ||
01cb225d MC |
1367 | static int |
1368 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
1369 | struct iscsi_uevent *ev) | |
1370 | { | |
2174a04e | 1371 | struct Scsi_Host *shost; |
01cb225d | 1372 | struct sockaddr *dst_addr; |
2174a04e | 1373 | int err; |
01cb225d MC |
1374 | |
1375 | if (!transport->tgt_dscvr) | |
1376 | return -EINVAL; | |
1377 | ||
2174a04e | 1378 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
315cb0ad | 1379 | if (!shost) { |
2174a04e MC |
1380 | printk(KERN_ERR "target discovery could not find host no %u\n", |
1381 | ev->u.tgt_dscvr.host_no); | |
1382 | return -ENODEV; | |
1383 | } | |
1384 | ||
1385 | ||
01cb225d | 1386 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
1387 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
1388 | ev->u.tgt_dscvr.enable, dst_addr); | |
1389 | scsi_host_put(shost); | |
1390 | return err; | |
01cb225d MC |
1391 | } |
1392 | ||
1d9bf13a MC |
1393 | static int |
1394 | iscsi_set_host_param(struct iscsi_transport *transport, | |
1395 | struct iscsi_uevent *ev) | |
1396 | { | |
1397 | char *data = (char*)ev + sizeof(*ev); | |
1398 | struct Scsi_Host *shost; | |
1399 | int err; | |
1400 | ||
1401 | if (!transport->set_host_param) | |
1402 | return -ENOSYS; | |
1403 | ||
1404 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
315cb0ad | 1405 | if (!shost) { |
1d9bf13a MC |
1406 | printk(KERN_ERR "set_host_param could not find host no %u\n", |
1407 | ev->u.set_host_param.host_no); | |
1408 | return -ENODEV; | |
1409 | } | |
1410 | ||
1411 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1412 | data, ev->u.set_host_param.len); | |
1413 | scsi_host_put(shost); | |
1414 | return err; | |
1415 | } | |
1416 | ||
0896b752 | 1417 | static int |
43514774 MC |
1418 | iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
1419 | { | |
1420 | struct Scsi_Host *shost; | |
1421 | struct iscsi_path *params; | |
1422 | int err; | |
1423 | ||
1424 | if (!transport->set_path) | |
1425 | return -ENOSYS; | |
1426 | ||
1427 | shost = scsi_host_lookup(ev->u.set_path.host_no); | |
1428 | if (!shost) { | |
1429 | printk(KERN_ERR "set path could not find host no %u\n", | |
1430 | ev->u.set_path.host_no); | |
1431 | return -ENODEV; | |
1432 | } | |
1433 | ||
1434 | params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); | |
1435 | err = transport->set_path(shost, params); | |
1436 | ||
1437 | scsi_host_put(shost); | |
1438 | return err; | |
1439 | } | |
1440 | ||
1441 | static int | |
1442 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) | |
0896b752 AA |
1443 | { |
1444 | int err = 0; | |
1445 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1446 | struct iscsi_transport *transport = NULL; | |
1447 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1448 | struct iscsi_cls_session *session; |
1449 | struct iscsi_cls_conn *conn; | |
d82ff9be | 1450 | struct iscsi_endpoint *ep = NULL; |
0896b752 | 1451 | |
43514774 MC |
1452 | if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) |
1453 | *group = ISCSI_NL_GRP_UIP; | |
1454 | else | |
1455 | *group = ISCSI_NL_GRP_ISCSID; | |
1456 | ||
0896b752 AA |
1457 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1458 | if (!priv) | |
1459 | return -EINVAL; | |
1460 | transport = priv->iscsi_transport; | |
1461 | ||
7b7232f3 MC |
1462 | if (!try_module_get(transport->owner)) |
1463 | return -EINVAL; | |
1464 | ||
0896b752 AA |
1465 | switch (nlh->nlmsg_type) { |
1466 | case ISCSI_UEVENT_CREATE_SESSION: | |
d82ff9be | 1467 | err = iscsi_if_create_session(priv, ep, ev, |
40753caa MC |
1468 | ev->u.c_session.initial_cmdsn, |
1469 | ev->u.c_session.cmds_max, | |
1470 | ev->u.c_session.queue_depth); | |
1471 | break; | |
1472 | case ISCSI_UEVENT_CREATE_BOUND_SESSION: | |
d82ff9be | 1473 | ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); |
c95fddc7 MC |
1474 | if (!ep) { |
1475 | err = -EINVAL; | |
1476 | break; | |
1477 | } | |
d82ff9be MC |
1478 | |
1479 | err = iscsi_if_create_session(priv, ep, ev, | |
40753caa MC |
1480 | ev->u.c_bound_session.initial_cmdsn, |
1481 | ev->u.c_bound_session.cmds_max, | |
1482 | ev->u.c_bound_session.queue_depth); | |
0896b752 AA |
1483 | break; |
1484 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1485 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1486 | if (session) |
7b7232f3 | 1487 | transport->destroy_session(session); |
26974789 MC |
1488 | else |
1489 | err = -EINVAL; | |
1490 | break; | |
1491 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1492 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1493 | if (session) | |
06d25af4 MC |
1494 | scsi_queue_work(iscsi_session_to_shost(session), |
1495 | &session->unbind_work); | |
26974789 | 1496 | else |
7b7232f3 | 1497 | err = -EINVAL; |
0896b752 AA |
1498 | break; |
1499 | case ISCSI_UEVENT_CREATE_CONN: | |
1500 | err = iscsi_if_create_conn(transport, ev); | |
1501 | break; | |
1502 | case ISCSI_UEVENT_DESTROY_CONN: | |
1503 | err = iscsi_if_destroy_conn(transport, ev); | |
1504 | break; | |
1505 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1506 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1507 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 MC |
1508 | |
1509 | if (session && conn) | |
1510 | ev->r.retcode = transport->bind_conn(session, conn, | |
264faaaa | 1511 | ev->u.b_conn.transport_eph, |
7b7232f3 MC |
1512 | ev->u.b_conn.is_leading); |
1513 | else | |
1514 | err = -EINVAL; | |
0896b752 AA |
1515 | break; |
1516 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1517 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1518 | break; |
1519 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1520 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1521 | if (conn) |
1522 | ev->r.retcode = transport->start_conn(conn); | |
1523 | else | |
1524 | err = -EINVAL; | |
0896b752 AA |
1525 | break; |
1526 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1527 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1528 | if (conn) |
1529 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1530 | else | |
1531 | err = -EINVAL; | |
0896b752 AA |
1532 | break; |
1533 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1534 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1535 | if (conn) |
1536 | ev->r.retcode = transport->send_pdu(conn, | |
1537 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1538 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1539 | ev->u.send_pdu.data_size); | |
1540 | else | |
1541 | err = -EINVAL; | |
0896b752 AA |
1542 | break; |
1543 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1544 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1545 | break; |
264faaaa OG |
1546 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1547 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1548 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
10eb0f01 | 1549 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: |
264faaaa OG |
1550 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); |
1551 | break; | |
01cb225d MC |
1552 | case ISCSI_UEVENT_TGT_DSCVR: |
1553 | err = iscsi_tgt_dscvr(transport, ev); | |
1554 | break; | |
1d9bf13a MC |
1555 | case ISCSI_UEVENT_SET_HOST_PARAM: |
1556 | err = iscsi_set_host_param(transport, ev); | |
1557 | break; | |
43514774 MC |
1558 | case ISCSI_UEVENT_PATH_UPDATE: |
1559 | err = iscsi_set_path(transport, ev); | |
1560 | break; | |
0896b752 | 1561 | default: |
1d9bf13a | 1562 | err = -ENOSYS; |
0896b752 AA |
1563 | break; |
1564 | } | |
1565 | ||
7b7232f3 | 1566 | module_put(transport->owner); |
0896b752 AA |
1567 | return err; |
1568 | } | |
1569 | ||
b5c7a12d | 1570 | /* |
cd40b7d3 DL |
1571 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
1572 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 1573 | */ |
0896b752 | 1574 | static void |
cd40b7d3 | 1575 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 1576 | { |
0b950672 | 1577 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
1578 | while (skb->len >= NLMSG_SPACE(0)) { |
1579 | int err; | |
1580 | uint32_t rlen; | |
1581 | struct nlmsghdr *nlh; | |
1582 | struct iscsi_uevent *ev; | |
43514774 | 1583 | uint32_t group; |
cd40b7d3 DL |
1584 | |
1585 | nlh = nlmsg_hdr(skb); | |
1586 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
1587 | skb->len < nlh->nlmsg_len) { | |
1588 | break; | |
ee7f8e40 | 1589 | } |
ee7f8e40 | 1590 | |
cd40b7d3 DL |
1591 | ev = NLMSG_DATA(nlh); |
1592 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1593 | if (rlen > skb->len) | |
1594 | rlen = skb->len; | |
0896b752 | 1595 | |
43514774 | 1596 | err = iscsi_if_recv_msg(skb, nlh, &group); |
cd40b7d3 DL |
1597 | if (err) { |
1598 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1599 | ev->iferror = err; | |
0896b752 | 1600 | } |
cd40b7d3 DL |
1601 | do { |
1602 | /* | |
1603 | * special case for GET_STATS: | |
1604 | * on success - sending reply and stats from | |
1605 | * inside of if_recv_msg(), | |
1606 | * on error - fall through. | |
1607 | */ | |
1608 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1609 | break; | |
43514774 | 1610 | err = iscsi_if_send_reply(group, nlh->nlmsg_seq, |
cd40b7d3 DL |
1611 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); |
1612 | } while (err < 0 && err != -ECONNREFUSED); | |
1613 | skb_pull(skb, rlen); | |
0896b752 | 1614 | } |
0b950672 | 1615 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1616 | } |
1da177e4 | 1617 | |
fd7255f5 | 1618 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
ee959b00 | 1619 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
fd7255f5 MC |
1620 | __ATTR(_name,_mode,_show,_store) |
1621 | ||
1da177e4 | 1622 | /* |
0896b752 | 1623 | * iSCSI connection attrs |
1da177e4 | 1624 | */ |
a54a52ca | 1625 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1626 | static ssize_t \ |
ee959b00 TJ |
1627 | show_conn_param_##param(struct device *dev, \ |
1628 | struct device_attribute *attr, char *buf) \ | |
0896b752 | 1629 | { \ |
ee959b00 | 1630 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ |
7b8631b5 | 1631 | struct iscsi_transport *t = conn->transport; \ |
a54a52ca | 1632 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1633 | } |
1634 | ||
a54a52ca MC |
1635 | #define iscsi_conn_attr(field, param) \ |
1636 | iscsi_conn_attr_show(param) \ | |
1637 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1638 | NULL); |
0896b752 | 1639 | |
a54a52ca MC |
1640 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1641 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1642 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1643 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1644 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1645 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1646 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
1647 | iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT); | |
1648 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); | |
1649 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
1650 | iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
f6d5180c MC |
1651 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
1652 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 LT |
1653 | |
1654 | /* | |
0896b752 | 1655 | * iSCSI session attrs |
1da177e4 | 1656 | */ |
b2c64167 | 1657 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 1658 | static ssize_t \ |
ee959b00 TJ |
1659 | show_session_param_##param(struct device *dev, \ |
1660 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1661 | { \ |
ee959b00 TJ |
1662 | struct iscsi_cls_session *session = \ |
1663 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 | 1664 | struct iscsi_transport *t = session->transport; \ |
b2c64167 MC |
1665 | \ |
1666 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
1667 | return -EACCES; \ | |
a54a52ca | 1668 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
1669 | } |
1670 | ||
b2c64167 MC |
1671 | #define iscsi_session_attr(field, param, perm) \ |
1672 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 1673 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 MC |
1674 | NULL); |
1675 | ||
b2c64167 MC |
1676 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
1677 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
1678 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
1679 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
1680 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
1681 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
1682 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
1683 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
1684 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
1685 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
1686 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
1687 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
1688 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
1689 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
1690 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
1691 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
1692 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
88dfd340 MC |
1693 | iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); |
1694 | iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0) | |
1da177e4 | 1695 | |
6eabafbe | 1696 | static ssize_t |
ee959b00 TJ |
1697 | show_priv_session_state(struct device *dev, struct device_attribute *attr, |
1698 | char *buf) | |
6eabafbe | 1699 | { |
ee959b00 | 1700 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); |
6eabafbe MC |
1701 | return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); |
1702 | } | |
1703 | static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, | |
1704 | NULL); | |
1705 | ||
fd7255f5 MC |
1706 | #define iscsi_priv_session_attr_show(field, format) \ |
1707 | static ssize_t \ | |
ee959b00 TJ |
1708 | show_priv_session_##field(struct device *dev, \ |
1709 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 1710 | { \ |
ee959b00 TJ |
1711 | struct iscsi_cls_session *session = \ |
1712 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 MC |
1713 | return sprintf(buf, format"\n", session->field); \ |
1714 | } | |
1715 | ||
1716 | #define iscsi_priv_session_attr(field, format) \ | |
1717 | iscsi_priv_session_attr_show(field, format) \ | |
1718 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \ | |
1719 | NULL) | |
30a6c652 | 1720 | iscsi_priv_session_attr(recovery_tmo, "%d"); |
fd7255f5 | 1721 | |
1819dc81 MC |
1722 | /* |
1723 | * iSCSI host attrs | |
1724 | */ | |
1725 | #define iscsi_host_attr_show(param) \ | |
1726 | static ssize_t \ | |
ee959b00 TJ |
1727 | show_host_param_##param(struct device *dev, \ |
1728 | struct device_attribute *attr, char *buf) \ | |
1819dc81 | 1729 | { \ |
ee959b00 | 1730 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1819dc81 MC |
1731 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ |
1732 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
1733 | } | |
1734 | ||
1735 | #define iscsi_host_attr(field, param) \ | |
1736 | iscsi_host_attr_show(param) \ | |
1737 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
1738 | NULL); | |
1739 | ||
d8196ed2 | 1740 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 1741 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 1742 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 1743 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 1744 | |
fd7255f5 MC |
1745 | #define SETUP_PRIV_SESSION_RD_ATTR(field) \ |
1746 | do { \ | |
ee959b00 | 1747 | priv->session_attrs[count] = &dev_attr_priv_sess_##field; \ |
fd7255f5 MC |
1748 | count++; \ |
1749 | } while (0) | |
1750 | ||
a54a52ca | 1751 | |
fd7255f5 MC |
1752 | #define SETUP_SESSION_RD_ATTR(field, param_flag) \ |
1753 | do { \ | |
1754 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1755 | priv->session_attrs[count] = &dev_attr_sess_##field; \ |
1da177e4 | 1756 | count++; \ |
fd7255f5 MC |
1757 | } \ |
1758 | } while (0) | |
1759 | ||
fd7255f5 MC |
1760 | #define SETUP_CONN_RD_ATTR(field, param_flag) \ |
1761 | do { \ | |
1762 | if (tt->param_mask & param_flag) { \ | |
ee959b00 | 1763 | priv->conn_attrs[count] = &dev_attr_conn_##field; \ |
fd7255f5 MC |
1764 | count++; \ |
1765 | } \ | |
1766 | } while (0) | |
1da177e4 | 1767 | |
1819dc81 MC |
1768 | #define SETUP_HOST_RD_ATTR(field, param_flag) \ |
1769 | do { \ | |
1770 | if (tt->host_param_mask & param_flag) { \ | |
ee959b00 | 1771 | priv->host_attrs[count] = &dev_attr_host_##field; \ |
1819dc81 MC |
1772 | count++; \ |
1773 | } \ | |
1774 | } while (0) | |
1775 | ||
0896b752 AA |
1776 | static int iscsi_session_match(struct attribute_container *cont, |
1777 | struct device *dev) | |
1da177e4 | 1778 | { |
7b8631b5 | 1779 | struct iscsi_cls_session *session; |
1da177e4 | 1780 | struct Scsi_Host *shost; |
0896b752 AA |
1781 | struct iscsi_internal *priv; |
1782 | ||
1783 | if (!iscsi_is_session_dev(dev)) | |
1784 | return 0; | |
1da177e4 | 1785 | |
7b8631b5 MC |
1786 | session = iscsi_dev_to_session(dev); |
1787 | shost = iscsi_session_to_shost(session); | |
0896b752 | 1788 | if (!shost->transportt) |
1da177e4 LT |
1789 | return 0; |
1790 | ||
0896b752 AA |
1791 | priv = to_iscsi_internal(shost->transportt); |
1792 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
1793 | return 0; |
1794 | ||
0896b752 | 1795 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
1796 | } |
1797 | ||
0896b752 AA |
1798 | static int iscsi_conn_match(struct attribute_container *cont, |
1799 | struct device *dev) | |
1800 | { | |
7b8631b5 MC |
1801 | struct iscsi_cls_session *session; |
1802 | struct iscsi_cls_conn *conn; | |
1da177e4 | 1803 | struct Scsi_Host *shost; |
0896b752 | 1804 | struct iscsi_internal *priv; |
1da177e4 | 1805 | |
0896b752 | 1806 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
1807 | return 0; |
1808 | ||
7b8631b5 MC |
1809 | conn = iscsi_dev_to_conn(dev); |
1810 | session = iscsi_dev_to_session(conn->dev.parent); | |
1811 | shost = iscsi_session_to_shost(session); | |
1812 | ||
0896b752 | 1813 | if (!shost->transportt) |
1da177e4 LT |
1814 | return 0; |
1815 | ||
0896b752 AA |
1816 | priv = to_iscsi_internal(shost->transportt); |
1817 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
1818 | return 0; | |
1da177e4 | 1819 | |
0896b752 AA |
1820 | return &priv->conn_cont.ac == cont; |
1821 | } | |
1822 | ||
30a6c652 MC |
1823 | static int iscsi_host_match(struct attribute_container *cont, |
1824 | struct device *dev) | |
1825 | { | |
1826 | struct Scsi_Host *shost; | |
1827 | struct iscsi_internal *priv; | |
1828 | ||
1829 | if (!scsi_is_host_device(dev)) | |
1830 | return 0; | |
1831 | ||
1832 | shost = dev_to_shost(dev); | |
1833 | if (!shost->transportt || | |
1834 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
1835 | return 0; | |
1836 | ||
1837 | priv = to_iscsi_internal(shost->transportt); | |
1838 | return &priv->t.host_attrs.ac == cont; | |
1839 | } | |
1840 | ||
7b8631b5 MC |
1841 | struct scsi_transport_template * |
1842 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
1843 | { |
1844 | struct iscsi_internal *priv; | |
1845 | unsigned long flags; | |
1846 | int count = 0, err; | |
1847 | ||
1848 | BUG_ON(!tt); | |
1849 | ||
1850 | priv = iscsi_if_transport_lookup(tt); | |
1851 | if (priv) | |
7b8631b5 | 1852 | return NULL; |
0896b752 | 1853 | |
24669f75 | 1854 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 1855 | if (!priv) |
7b8631b5 | 1856 | return NULL; |
0896b752 | 1857 | INIT_LIST_HEAD(&priv->list); |
0896b752 | 1858 | priv->iscsi_transport = tt; |
30a6c652 | 1859 | priv->t.user_scan = iscsi_user_scan; |
06d25af4 | 1860 | priv->t.create_work_queue = 1; |
0896b752 | 1861 | |
ee959b00 | 1862 | priv->dev.class = &iscsi_transport_class; |
71610f55 | 1863 | dev_set_name(&priv->dev, "%s", tt->name); |
ee959b00 | 1864 | err = device_register(&priv->dev); |
0896b752 AA |
1865 | if (err) |
1866 | goto free_priv; | |
1867 | ||
ee959b00 | 1868 | err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); |
0896b752 | 1869 | if (err) |
ee959b00 | 1870 | goto unregister_dev; |
0896b752 | 1871 | |
30a6c652 MC |
1872 | /* host parameters */ |
1873 | priv->t.host_attrs.ac.attrs = &priv->host_attrs[0]; | |
1874 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; | |
1875 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
32c6e1b9 | 1876 | priv->t.host_size = sizeof(struct iscsi_cls_host); |
30a6c652 MC |
1877 | transport_container_register(&priv->t.host_attrs); |
1878 | ||
d8196ed2 | 1879 | SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME); |
22236961 | 1880 | SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS); |
1819dc81 | 1881 | SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS); |
8ad5781a | 1882 | SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME); |
1819dc81 MC |
1883 | BUG_ON(count > ISCSI_HOST_ATTRS); |
1884 | priv->host_attrs[count] = NULL; | |
1885 | count = 0; | |
1886 | ||
0896b752 AA |
1887 | /* connection parameters */ |
1888 | priv->conn_cont.ac.attrs = &priv->conn_attrs[0]; | |
1889 | priv->conn_cont.ac.class = &iscsi_connection_class.class; | |
1890 | priv->conn_cont.ac.match = iscsi_conn_match; | |
1891 | transport_container_register(&priv->conn_cont); | |
1da177e4 | 1892 | |
fd7255f5 MC |
1893 | SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH); |
1894 | SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH); | |
1895 | SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN); | |
1896 | SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN); | |
1897 | SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN); | |
1898 | SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN); | |
1899 | SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS); | |
1900 | SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT); | |
8d2860b3 | 1901 | SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN); |
a54a52ca MC |
1902 | SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS); |
1903 | SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT); | |
f6d5180c MC |
1904 | SETUP_CONN_RD_ATTR(ping_tmo, ISCSI_PING_TMO); |
1905 | SETUP_CONN_RD_ATTR(recv_tmo, ISCSI_RECV_TMO); | |
0896b752 AA |
1906 | |
1907 | BUG_ON(count > ISCSI_CONN_ATTRS); | |
1908 | priv->conn_attrs[count] = NULL; | |
1da177e4 | 1909 | count = 0; |
1da177e4 | 1910 | |
0896b752 AA |
1911 | /* session parameters */ |
1912 | priv->session_cont.ac.attrs = &priv->session_attrs[0]; | |
1913 | priv->session_cont.ac.class = &iscsi_session_class.class; | |
1914 | priv->session_cont.ac.match = iscsi_session_match; | |
1915 | transport_container_register(&priv->session_cont); | |
1916 | ||
fd7255f5 MC |
1917 | SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN); |
1918 | SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T); | |
1919 | SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN); | |
1920 | SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST); | |
1921 | SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST); | |
1922 | SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN); | |
1923 | SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN); | |
1924 | SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL); | |
a54a52ca MC |
1925 | SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME); |
1926 | SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT); | |
b2c64167 MC |
1927 | SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME); |
1928 | SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN); | |
1929 | SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD); | |
1930 | SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN); | |
843c0a8a | 1931 | SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT); |
4cd49ea1 MC |
1932 | SETUP_SESSION_RD_ATTR(abort_tmo, ISCSI_ABORT_TMO); |
1933 | SETUP_SESSION_RD_ATTR(lu_reset_tmo,ISCSI_LU_RESET_TMO); | |
88dfd340 MC |
1934 | SETUP_SESSION_RD_ATTR(ifacename, ISCSI_IFACE_NAME); |
1935 | SETUP_SESSION_RD_ATTR(initiatorname, ISCSI_INITIATOR_NAME); | |
30a6c652 | 1936 | SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo); |
6eabafbe | 1937 | SETUP_PRIV_SESSION_RD_ATTR(state); |
fd7255f5 | 1938 | |
0896b752 AA |
1939 | BUG_ON(count > ISCSI_SESSION_ATTRS); |
1940 | priv->session_attrs[count] = NULL; | |
1941 | ||
1942 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1943 | list_add(&priv->list, &iscsi_transports); | |
1944 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1945 | ||
1946 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 1947 | return &priv->t; |
1da177e4 | 1948 | |
ee959b00 TJ |
1949 | unregister_dev: |
1950 | device_unregister(&priv->dev); | |
d82ff9be | 1951 | return NULL; |
0896b752 AA |
1952 | free_priv: |
1953 | kfree(priv); | |
7b8631b5 | 1954 | return NULL; |
1da177e4 | 1955 | } |
0896b752 AA |
1956 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
1957 | ||
1958 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
1959 | { | |
1960 | struct iscsi_internal *priv; | |
1961 | unsigned long flags; | |
1962 | ||
1963 | BUG_ON(!tt); | |
1964 | ||
0b950672 | 1965 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
1966 | |
1967 | priv = iscsi_if_transport_lookup(tt); | |
1968 | BUG_ON (!priv); | |
1969 | ||
0896b752 AA |
1970 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
1971 | list_del(&priv->list); | |
1972 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1973 | ||
1974 | transport_container_unregister(&priv->conn_cont); | |
1975 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 1976 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 | 1977 | |
ee959b00 TJ |
1978 | sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); |
1979 | device_unregister(&priv->dev); | |
0b950672 | 1980 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 1981 | |
0896b752 AA |
1982 | return 0; |
1983 | } | |
1984 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 1985 | |
1da177e4 LT |
1986 | static __init int iscsi_transport_init(void) |
1987 | { | |
0896b752 | 1988 | int err; |
1da177e4 | 1989 | |
09492605 | 1990 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
1991 | ISCSI_TRANSPORT_VERSION); |
1992 | ||
41be1444 MC |
1993 | atomic_set(&iscsi_session_nr, 0); |
1994 | ||
0896b752 | 1995 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
1996 | if (err) |
1997 | return err; | |
0896b752 | 1998 | |
d82ff9be | 1999 | err = class_register(&iscsi_endpoint_class); |
0896b752 AA |
2000 | if (err) |
2001 | goto unregister_transport_class; | |
2002 | ||
d82ff9be MC |
2003 | err = transport_class_register(&iscsi_host_class); |
2004 | if (err) | |
2005 | goto unregister_endpoint_class; | |
2006 | ||
30a6c652 MC |
2007 | err = transport_class_register(&iscsi_connection_class); |
2008 | if (err) | |
2009 | goto unregister_host_class; | |
2010 | ||
0896b752 AA |
2011 | err = transport_class_register(&iscsi_session_class); |
2012 | if (err) | |
2013 | goto unregister_conn_class; | |
2014 | ||
d82ff9be MC |
2015 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, |
2016 | NULL, THIS_MODULE); | |
0896b752 AA |
2017 | if (!nls) { |
2018 | err = -ENOBUFS; | |
43a145a3 | 2019 | goto unregister_session_class; |
0896b752 AA |
2020 | } |
2021 | ||
d8bf541e MC |
2022 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
2023 | if (!iscsi_eh_timer_workq) | |
2024 | goto release_nls; | |
2025 | ||
43a145a3 | 2026 | return 0; |
0896b752 | 2027 | |
d8bf541e | 2028 | release_nls: |
b7c6ba6e | 2029 | netlink_kernel_release(nls); |
0896b752 AA |
2030 | unregister_session_class: |
2031 | transport_class_unregister(&iscsi_session_class); | |
2032 | unregister_conn_class: | |
2033 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
2034 | unregister_host_class: |
2035 | transport_class_unregister(&iscsi_host_class); | |
d82ff9be MC |
2036 | unregister_endpoint_class: |
2037 | class_unregister(&iscsi_endpoint_class); | |
0896b752 AA |
2038 | unregister_transport_class: |
2039 | class_unregister(&iscsi_transport_class); | |
2040 | return err; | |
1da177e4 LT |
2041 | } |
2042 | ||
2043 | static void __exit iscsi_transport_exit(void) | |
2044 | { | |
d8bf541e | 2045 | destroy_workqueue(iscsi_eh_timer_workq); |
b7c6ba6e | 2046 | netlink_kernel_release(nls); |
0896b752 AA |
2047 | transport_class_unregister(&iscsi_connection_class); |
2048 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 2049 | transport_class_unregister(&iscsi_host_class); |
d82ff9be | 2050 | class_unregister(&iscsi_endpoint_class); |
0896b752 | 2051 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
2052 | } |
2053 | ||
2054 | module_init(iscsi_transport_init); | |
2055 | module_exit(iscsi_transport_exit); | |
2056 | ||
0896b752 AA |
2057 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
2058 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
2059 | "Alex Aizman <itn780@yahoo.com>"); | |
2060 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 2061 | MODULE_LICENSE("GPL"); |
f4246b33 | 2062 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |