Commit | Line | Data |
---|---|---|
0896b752 | 1 | /* |
1da177e4 LT |
2 | * iSCSI transport class definitions |
3 | * | |
4 | * Copyright (C) IBM Corporation, 2004 | |
0896b752 AA |
5 | * Copyright (C) Mike Christie, 2004 - 2005 |
6 | * Copyright (C) Dmitry Yusupov, 2004 - 2005 | |
7 | * Copyright (C) Alex Aizman, 2004 - 2005 | |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | #include <linux/module.h> | |
0b950672 | 24 | #include <linux/mutex.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
0896b752 | 26 | #include <net/tcp.h> |
1da177e4 LT |
27 | #include <scsi/scsi.h> |
28 | #include <scsi/scsi_host.h> | |
29 | #include <scsi/scsi_device.h> | |
30 | #include <scsi/scsi_transport.h> | |
31 | #include <scsi/scsi_transport_iscsi.h> | |
0896b752 | 32 | #include <scsi/iscsi_if.h> |
c01be6dc | 33 | #include <scsi/scsi_cmnd.h> |
1da177e4 | 34 | |
4c2133c8 | 35 | #define ISCSI_TRANSPORT_VERSION "2.0-870" |
1da177e4 | 36 | |
632248aa MC |
37 | static int dbg_session; |
38 | module_param_named(debug_session, dbg_session, int, | |
39 | S_IRUGO | S_IWUSR); | |
40 | MODULE_PARM_DESC(debug_session, | |
41 | "Turn on debugging for sessions in scsi_transport_iscsi " | |
42 | "module. Set to 1 to turn on, and zero to turn off. Default " | |
43 | "is off."); | |
44 | ||
45 | static int dbg_conn; | |
46 | module_param_named(debug_conn, dbg_conn, int, | |
47 | S_IRUGO | S_IWUSR); | |
48 | MODULE_PARM_DESC(debug_conn, | |
49 | "Turn on debugging for connections in scsi_transport_iscsi " | |
50 | "module. Set to 1 to turn on, and zero to turn off. Default " | |
51 | "is off."); | |
52 | ||
53 | #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \ | |
54 | do { \ | |
55 | if (dbg_session) \ | |
56 | iscsi_cls_session_printk(KERN_INFO, _session, \ | |
57 | "%s: " dbg_fmt, \ | |
58 | __func__, ##arg); \ | |
59 | } while (0); | |
60 | ||
61 | #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \ | |
62 | do { \ | |
63 | if (dbg_conn) \ | |
64 | iscsi_cls_conn_printk(KERN_INFO, _conn, \ | |
65 | "%s: " dbg_fmt, \ | |
66 | __func__, ##arg); \ | |
67 | } while (0); | |
68 | ||
1da177e4 LT |
69 | struct iscsi_internal { |
70 | struct scsi_transport_template t; | |
0896b752 AA |
71 | struct iscsi_transport *iscsi_transport; |
72 | struct list_head list; | |
ee959b00 | 73 | struct device dev; |
30a6c652 | 74 | |
0896b752 | 75 | struct transport_container conn_cont; |
0896b752 | 76 | struct transport_container session_cont; |
1da177e4 LT |
77 | }; |
78 | ||
41be1444 | 79 | static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ |
d8bf541e | 80 | static struct workqueue_struct *iscsi_eh_timer_workq; |
b5c7a12d | 81 | |
0896b752 AA |
82 | /* |
83 | * list of registered transports and lock that must | |
84 | * be held while accessing list. The iscsi_transport_lock must | |
0b950672 | 85 | * be acquired after the rx_queue_mutex. |
0896b752 AA |
86 | */ |
87 | static LIST_HEAD(iscsi_transports); | |
88 | static DEFINE_SPINLOCK(iscsi_transport_lock); | |
89 | ||
90 | #define to_iscsi_internal(tmpl) \ | |
91 | container_of(tmpl, struct iscsi_internal, t) | |
92 | ||
ee959b00 TJ |
93 | #define dev_to_iscsi_internal(_dev) \ |
94 | container_of(_dev, struct iscsi_internal, dev) | |
0896b752 | 95 | |
ee959b00 | 96 | static void iscsi_transport_release(struct device *dev) |
0896b752 | 97 | { |
ee959b00 | 98 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
0896b752 AA |
99 | kfree(priv); |
100 | } | |
1da177e4 | 101 | |
0896b752 AA |
102 | /* |
103 | * iscsi_transport_class represents the iscsi_transports that are | |
104 | * registered. | |
105 | */ | |
106 | static struct class iscsi_transport_class = { | |
107 | .name = "iscsi_transport", | |
ee959b00 | 108 | .dev_release = iscsi_transport_release, |
0896b752 AA |
109 | }; |
110 | ||
111 | static ssize_t | |
ee959b00 TJ |
112 | show_transport_handle(struct device *dev, struct device_attribute *attr, |
113 | char *buf) | |
0896b752 | 114 | { |
ee959b00 | 115 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
762e2bfa | 116 | return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); |
0896b752 | 117 | } |
ee959b00 | 118 | static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); |
0896b752 AA |
119 | |
120 | #define show_transport_attr(name, format) \ | |
121 | static ssize_t \ | |
ee959b00 TJ |
122 | show_transport_##name(struct device *dev, \ |
123 | struct device_attribute *attr,char *buf) \ | |
0896b752 | 124 | { \ |
ee959b00 | 125 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ |
0896b752 AA |
126 | return sprintf(buf, format"\n", priv->iscsi_transport->name); \ |
127 | } \ | |
ee959b00 | 128 | static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); |
0896b752 AA |
129 | |
130 | show_transport_attr(caps, "0x%x"); | |
0896b752 AA |
131 | |
132 | static struct attribute *iscsi_transport_attrs[] = { | |
ee959b00 TJ |
133 | &dev_attr_handle.attr, |
134 | &dev_attr_caps.attr, | |
0896b752 AA |
135 | NULL, |
136 | }; | |
137 | ||
138 | static struct attribute_group iscsi_transport_group = { | |
139 | .attrs = iscsi_transport_attrs, | |
140 | }; | |
141 | ||
d82ff9be MC |
142 | /* |
143 | * iSCSI endpoint attrs | |
144 | */ | |
145 | #define iscsi_dev_to_endpoint(_dev) \ | |
146 | container_of(_dev, struct iscsi_endpoint, dev) | |
147 | ||
148 | #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ | |
149 | struct device_attribute dev_attr_##_prefix##_##_name = \ | |
150 | __ATTR(_name,_mode,_show,_store) | |
151 | ||
152 | static void iscsi_endpoint_release(struct device *dev) | |
153 | { | |
154 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
155 | kfree(ep); | |
156 | } | |
157 | ||
158 | static struct class iscsi_endpoint_class = { | |
159 | .name = "iscsi_endpoint", | |
160 | .dev_release = iscsi_endpoint_release, | |
161 | }; | |
162 | ||
163 | static ssize_t | |
164 | show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) | |
165 | { | |
166 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
21536062 | 167 | return sprintf(buf, "%llu\n", (unsigned long long) ep->id); |
d82ff9be MC |
168 | } |
169 | static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); | |
170 | ||
171 | static struct attribute *iscsi_endpoint_attrs[] = { | |
172 | &dev_attr_ep_handle.attr, | |
173 | NULL, | |
174 | }; | |
175 | ||
176 | static struct attribute_group iscsi_endpoint_group = { | |
177 | .attrs = iscsi_endpoint_attrs, | |
178 | }; | |
179 | ||
180 | #define ISCSI_MAX_EPID -1 | |
181 | ||
182 | static int iscsi_match_epid(struct device *dev, void *data) | |
183 | { | |
184 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
21536062 | 185 | uint64_t *epid = (uint64_t *) data; |
d82ff9be MC |
186 | |
187 | return *epid == ep->id; | |
188 | } | |
189 | ||
190 | struct iscsi_endpoint * | |
191 | iscsi_create_endpoint(int dd_size) | |
192 | { | |
193 | struct device *dev; | |
194 | struct iscsi_endpoint *ep; | |
21536062 | 195 | uint64_t id; |
d82ff9be MC |
196 | int err; |
197 | ||
198 | for (id = 1; id < ISCSI_MAX_EPID; id++) { | |
695794ae | 199 | dev = class_find_device(&iscsi_endpoint_class, NULL, &id, |
d82ff9be MC |
200 | iscsi_match_epid); |
201 | if (!dev) | |
202 | break; | |
203 | } | |
204 | if (id == ISCSI_MAX_EPID) { | |
205 | printk(KERN_ERR "Too many connections. Max supported %u\n", | |
206 | ISCSI_MAX_EPID - 1); | |
207 | return NULL; | |
208 | } | |
209 | ||
210 | ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); | |
211 | if (!ep) | |
212 | return NULL; | |
213 | ||
214 | ep->id = id; | |
215 | ep->dev.class = &iscsi_endpoint_class; | |
71610f55 | 216 | dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); |
d82ff9be MC |
217 | err = device_register(&ep->dev); |
218 | if (err) | |
219 | goto free_ep; | |
220 | ||
221 | err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); | |
222 | if (err) | |
223 | goto unregister_dev; | |
224 | ||
225 | if (dd_size) | |
226 | ep->dd_data = &ep[1]; | |
227 | return ep; | |
228 | ||
229 | unregister_dev: | |
230 | device_unregister(&ep->dev); | |
231 | return NULL; | |
232 | ||
233 | free_ep: | |
234 | kfree(ep); | |
235 | return NULL; | |
236 | } | |
237 | EXPORT_SYMBOL_GPL(iscsi_create_endpoint); | |
238 | ||
239 | void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) | |
240 | { | |
241 | sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); | |
242 | device_unregister(&ep->dev); | |
243 | } | |
244 | EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); | |
245 | ||
246 | struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) | |
247 | { | |
f80f868e | 248 | struct iscsi_endpoint *ep; |
d82ff9be MC |
249 | struct device *dev; |
250 | ||
695794ae | 251 | dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, |
d82ff9be MC |
252 | iscsi_match_epid); |
253 | if (!dev) | |
254 | return NULL; | |
255 | ||
f80f868e MC |
256 | ep = iscsi_dev_to_endpoint(dev); |
257 | /* | |
258 | * we can drop this now because the interface will prevent | |
259 | * removals and lookups from racing. | |
260 | */ | |
261 | put_device(dev); | |
262 | return ep; | |
d82ff9be MC |
263 | } |
264 | EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); | |
265 | ||
8d07913d MC |
266 | /* |
267 | * Interface to display network param to sysfs | |
268 | */ | |
269 | ||
270 | static void iscsi_iface_release(struct device *dev) | |
271 | { | |
272 | struct iscsi_iface *iface = iscsi_dev_to_iface(dev); | |
273 | struct device *parent = iface->dev.parent; | |
274 | ||
275 | kfree(iface); | |
276 | put_device(parent); | |
277 | } | |
278 | ||
279 | ||
280 | static struct class iscsi_iface_class = { | |
281 | .name = "iscsi_iface", | |
282 | .dev_release = iscsi_iface_release, | |
283 | }; | |
284 | ||
285 | #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ | |
286 | struct device_attribute dev_attr_##_prefix##_##_name = \ | |
287 | __ATTR(_name, _mode, _show, _store) | |
288 | ||
289 | /* iface attrs show */ | |
290 | #define iscsi_iface_attr_show(type, name, param_type, param) \ | |
291 | static ssize_t \ | |
292 | show_##type##_##name(struct device *dev, struct device_attribute *attr, \ | |
293 | char *buf) \ | |
294 | { \ | |
295 | struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ | |
296 | struct iscsi_transport *t = iface->transport; \ | |
297 | return t->get_iface_param(iface, param_type, param, buf); \ | |
298 | } \ | |
299 | ||
300 | #define iscsi_iface_net_attr(type, name, param) \ | |
301 | iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ | |
302 | static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); | |
303 | ||
304 | /* generic read only ipvi4 attribute */ | |
305 | iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); | |
306 | iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); | |
307 | iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); | |
308 | iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); | |
309 | ||
310 | /* generic read only ipv6 attribute */ | |
311 | iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); | |
312 | iscsi_iface_net_attr(ipv6_iface, link_local_addr, ISCSI_NET_PARAM_IPV6_LINKLOCAL); | |
313 | iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); | |
314 | iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, | |
315 | ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); | |
316 | iscsi_iface_net_attr(ipv6_iface, linklocal_autocfg, | |
317 | ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); | |
318 | ||
319 | /* common read only iface attribute */ | |
320 | iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); | |
321 | iscsi_iface_net_attr(iface, vlan, ISCSI_NET_PARAM_VLAN_ID); | |
322 | ||
323 | static mode_t iscsi_iface_attr_is_visible(struct kobject *kobj, | |
324 | struct attribute *attr, int i) | |
325 | { | |
326 | struct device *dev = container_of(kobj, struct device, kobj); | |
327 | struct iscsi_iface *iface = iscsi_dev_to_iface(dev); | |
328 | struct iscsi_transport *t = iface->transport; | |
b78dbba0 | 329 | int param; |
8d07913d MC |
330 | |
331 | if (attr == &dev_attr_iface_enabled.attr) | |
b78dbba0 | 332 | param = ISCSI_NET_PARAM_IFACE_ENABLE; |
8d07913d | 333 | else if (attr == &dev_attr_iface_vlan.attr) |
b78dbba0 MC |
334 | param = ISCSI_NET_PARAM_VLAN_ID; |
335 | else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { | |
8d07913d | 336 | if (attr == &dev_attr_ipv4_iface_ipaddress.attr) |
b78dbba0 | 337 | param = ISCSI_NET_PARAM_IPV4_ADDR; |
8d07913d | 338 | else if (attr == &dev_attr_ipv4_iface_gateway.attr) |
b78dbba0 | 339 | param = ISCSI_NET_PARAM_IPV4_GW; |
8d07913d | 340 | else if (attr == &dev_attr_ipv4_iface_subnet.attr) |
b78dbba0 | 341 | param = ISCSI_NET_PARAM_IPV4_SUBNET; |
8d07913d | 342 | else if (attr == &dev_attr_ipv4_iface_bootproto.attr) |
b78dbba0 MC |
343 | param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; |
344 | else | |
345 | return 0; | |
8d07913d MC |
346 | } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { |
347 | if (attr == &dev_attr_ipv6_iface_ipaddress.attr) | |
b78dbba0 | 348 | param = ISCSI_NET_PARAM_IPV6_ADDR; |
8d07913d | 349 | else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) |
b78dbba0 | 350 | param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; |
8d07913d | 351 | else if (attr == &dev_attr_ipv6_iface_router_addr.attr) |
b78dbba0 | 352 | param = ISCSI_NET_PARAM_IPV6_ROUTER; |
8d07913d | 353 | else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) |
b78dbba0 | 354 | param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; |
8d07913d | 355 | else if (attr == &dev_attr_ipv6_iface_linklocal_autocfg.attr) |
b78dbba0 MC |
356 | param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; |
357 | else | |
358 | return 0; | |
359 | } else { | |
360 | WARN_ONCE(1, "Invalid iface attr"); | |
361 | return 0; | |
8d07913d MC |
362 | } |
363 | ||
b78dbba0 | 364 | return t->attr_is_visible(ISCSI_NET_PARAM, param); |
8d07913d MC |
365 | } |
366 | ||
367 | static struct attribute *iscsi_iface_attrs[] = { | |
368 | &dev_attr_iface_enabled.attr, | |
369 | &dev_attr_iface_vlan.attr, | |
370 | &dev_attr_ipv4_iface_ipaddress.attr, | |
371 | &dev_attr_ipv4_iface_gateway.attr, | |
372 | &dev_attr_ipv4_iface_subnet.attr, | |
373 | &dev_attr_ipv4_iface_bootproto.attr, | |
374 | &dev_attr_ipv6_iface_ipaddress.attr, | |
375 | &dev_attr_ipv6_iface_link_local_addr.attr, | |
376 | &dev_attr_ipv6_iface_router_addr.attr, | |
377 | &dev_attr_ipv6_iface_ipaddr_autocfg.attr, | |
378 | &dev_attr_ipv6_iface_linklocal_autocfg.attr, | |
379 | NULL, | |
380 | }; | |
381 | ||
382 | static struct attribute_group iscsi_iface_group = { | |
383 | .attrs = iscsi_iface_attrs, | |
384 | .is_visible = iscsi_iface_attr_is_visible, | |
385 | }; | |
386 | ||
387 | struct iscsi_iface * | |
388 | iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, | |
389 | uint32_t iface_type, uint32_t iface_num, int dd_size) | |
390 | { | |
391 | struct iscsi_iface *iface; | |
392 | int err; | |
393 | ||
394 | iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); | |
395 | if (!iface) | |
396 | return NULL; | |
397 | ||
398 | iface->transport = transport; | |
399 | iface->iface_type = iface_type; | |
400 | iface->iface_num = iface_num; | |
401 | iface->dev.release = iscsi_iface_release; | |
402 | iface->dev.class = &iscsi_iface_class; | |
403 | /* parent reference released in iscsi_iface_release */ | |
404 | iface->dev.parent = get_device(&shost->shost_gendev); | |
405 | if (iface_type == ISCSI_IFACE_TYPE_IPV4) | |
406 | dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, | |
407 | iface_num); | |
408 | else | |
409 | dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, | |
410 | iface_num); | |
411 | ||
412 | err = device_register(&iface->dev); | |
413 | if (err) | |
414 | goto free_iface; | |
415 | ||
416 | err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); | |
417 | if (err) | |
418 | goto unreg_iface; | |
419 | ||
420 | if (dd_size) | |
421 | iface->dd_data = &iface[1]; | |
422 | return iface; | |
423 | ||
424 | unreg_iface: | |
425 | device_unregister(&iface->dev); | |
426 | return NULL; | |
427 | ||
428 | free_iface: | |
429 | put_device(iface->dev.parent); | |
430 | kfree(iface); | |
431 | return NULL; | |
432 | } | |
433 | EXPORT_SYMBOL_GPL(iscsi_create_iface); | |
434 | ||
435 | void iscsi_destroy_iface(struct iscsi_iface *iface) | |
436 | { | |
437 | sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); | |
438 | device_unregister(&iface->dev); | |
439 | } | |
440 | EXPORT_SYMBOL_GPL(iscsi_destroy_iface); | |
441 | ||
30a6c652 | 442 | static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
ee959b00 | 443 | struct device *cdev) |
30a6c652 MC |
444 | { |
445 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 446 | struct iscsi_cls_host *ihost = shost->shost_data; |
30a6c652 MC |
447 | |
448 | memset(ihost, 0, sizeof(*ihost)); | |
8aae18ad | 449 | atomic_set(&ihost->nr_scans, 0); |
7970634b | 450 | mutex_init(&ihost->mutex); |
30a6c652 MC |
451 | return 0; |
452 | } | |
453 | ||
454 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
455 | "iscsi_host", | |
456 | iscsi_setup_host, | |
06d25af4 | 457 | NULL, |
30a6c652 MC |
458 | NULL); |
459 | ||
0896b752 AA |
460 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
461 | "iscsi_session", | |
1da177e4 LT |
462 | NULL, |
463 | NULL, | |
464 | NULL); | |
465 | ||
0896b752 AA |
466 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
467 | "iscsi_connection", | |
1da177e4 LT |
468 | NULL, |
469 | NULL, | |
470 | NULL); | |
0896b752 AA |
471 | |
472 | static struct sock *nls; | |
0b950672 | 473 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 474 | |
7b7232f3 MC |
475 | static LIST_HEAD(sesslist); |
476 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
477 | static LIST_HEAD(connlist); |
478 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 479 | |
b5c7a12d MC |
480 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
481 | { | |
482 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
483 | return sess->sid; | |
484 | } | |
485 | ||
486 | /* | |
487 | * Returns the matching session to a given sid | |
488 | */ | |
489 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
490 | { |
491 | unsigned long flags; | |
492 | struct iscsi_cls_session *sess; | |
493 | ||
494 | spin_lock_irqsave(&sesslock, flags); | |
495 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 496 | if (sess->sid == sid) { |
7b7232f3 MC |
497 | spin_unlock_irqrestore(&sesslock, flags); |
498 | return sess; | |
499 | } | |
500 | } | |
501 | spin_unlock_irqrestore(&sesslock, flags); | |
502 | return NULL; | |
503 | } | |
504 | ||
b5c7a12d MC |
505 | /* |
506 | * Returns the matching connection to a given sid / cid tuple | |
507 | */ | |
508 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
509 | { |
510 | unsigned long flags; | |
511 | struct iscsi_cls_conn *conn; | |
512 | ||
513 | spin_lock_irqsave(&connlock, flags); | |
514 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 515 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
516 | spin_unlock_irqrestore(&connlock, flags); |
517 | return conn; | |
518 | } | |
519 | } | |
520 | spin_unlock_irqrestore(&connlock, flags); | |
521 | return NULL; | |
522 | } | |
523 | ||
7b8631b5 MC |
524 | /* |
525 | * The following functions can be used by LLDs that allocate | |
526 | * their own scsi_hosts or by software iscsi LLDs | |
527 | */ | |
6eabafbe MC |
528 | static struct { |
529 | int value; | |
530 | char *name; | |
531 | } iscsi_session_state_names[] = { | |
532 | { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, | |
533 | { ISCSI_SESSION_FAILED, "FAILED" }, | |
534 | { ISCSI_SESSION_FREE, "FREE" }, | |
535 | }; | |
536 | ||
3b0f208a | 537 | static const char *iscsi_session_state_name(int state) |
6eabafbe MC |
538 | { |
539 | int i; | |
540 | char *name = NULL; | |
541 | ||
542 | for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { | |
543 | if (iscsi_session_state_names[i].value == state) { | |
544 | name = iscsi_session_state_names[i].name; | |
545 | break; | |
546 | } | |
547 | } | |
548 | return name; | |
549 | } | |
550 | ||
551 | int iscsi_session_chkready(struct iscsi_cls_session *session) | |
552 | { | |
553 | unsigned long flags; | |
554 | int err; | |
555 | ||
556 | spin_lock_irqsave(&session->lock, flags); | |
557 | switch (session->state) { | |
558 | case ISCSI_SESSION_LOGGED_IN: | |
559 | err = 0; | |
560 | break; | |
561 | case ISCSI_SESSION_FAILED: | |
9a1a69a1 | 562 | err = DID_IMM_RETRY << 16; |
6eabafbe MC |
563 | break; |
564 | case ISCSI_SESSION_FREE: | |
56d7fcfa | 565 | err = DID_TRANSPORT_FAILFAST << 16; |
6eabafbe MC |
566 | break; |
567 | default: | |
568 | err = DID_NO_CONNECT << 16; | |
569 | break; | |
570 | } | |
571 | spin_unlock_irqrestore(&session->lock, flags); | |
572 | return err; | |
573 | } | |
574 | EXPORT_SYMBOL_GPL(iscsi_session_chkready); | |
575 | ||
7b8631b5 MC |
576 | static void iscsi_session_release(struct device *dev) |
577 | { | |
578 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 579 | struct Scsi_Host *shost; |
0896b752 | 580 | |
7b8631b5 MC |
581 | shost = iscsi_session_to_shost(session); |
582 | scsi_host_put(shost); | |
632248aa | 583 | ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); |
7b8631b5 | 584 | kfree(session); |
7b8631b5 | 585 | } |
0896b752 | 586 | |
7b8631b5 MC |
587 | static int iscsi_is_session_dev(const struct device *dev) |
588 | { | |
589 | return dev->release == iscsi_session_release; | |
590 | } | |
0896b752 | 591 | |
a4804cd6 MC |
592 | static int iscsi_iter_session_fn(struct device *dev, void *data) |
593 | { | |
594 | void (* fn) (struct iscsi_cls_session *) = data; | |
595 | ||
596 | if (!iscsi_is_session_dev(dev)) | |
597 | return 0; | |
598 | fn(iscsi_dev_to_session(dev)); | |
599 | return 0; | |
600 | } | |
601 | ||
602 | void iscsi_host_for_each_session(struct Scsi_Host *shost, | |
603 | void (*fn)(struct iscsi_cls_session *)) | |
604 | { | |
605 | device_for_each_child(&shost->shost_gendev, fn, | |
606 | iscsi_iter_session_fn); | |
607 | } | |
608 | EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); | |
609 | ||
8aae18ad MC |
610 | /** |
611 | * iscsi_scan_finished - helper to report when running scans are done | |
612 | * @shost: scsi host | |
613 | * @time: scan run time | |
614 | * | |
615 | * This function can be used by drives like qla4xxx to report to the scsi | |
616 | * layer when the scans it kicked off at module load time are done. | |
617 | */ | |
618 | int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
619 | { | |
32c6e1b9 | 620 | struct iscsi_cls_host *ihost = shost->shost_data; |
8aae18ad MC |
621 | /* |
622 | * qla4xxx will have kicked off some session unblocks before calling | |
623 | * scsi_scan_host, so just wait for them to complete. | |
624 | */ | |
625 | return !atomic_read(&ihost->nr_scans); | |
626 | } | |
627 | EXPORT_SYMBOL_GPL(iscsi_scan_finished); | |
628 | ||
7970634b MC |
629 | struct iscsi_scan_data { |
630 | unsigned int channel; | |
631 | unsigned int id; | |
632 | unsigned int lun; | |
633 | }; | |
634 | ||
635 | static int iscsi_user_scan_session(struct device *dev, void *data) | |
30a6c652 | 636 | { |
7970634b | 637 | struct iscsi_scan_data *scan_data = data; |
30a6c652 | 638 | struct iscsi_cls_session *session; |
7970634b MC |
639 | struct Scsi_Host *shost; |
640 | struct iscsi_cls_host *ihost; | |
641 | unsigned long flags; | |
642 | unsigned int id; | |
643 | ||
644 | if (!iscsi_is_session_dev(dev)) | |
645 | return 0; | |
646 | ||
647 | session = iscsi_dev_to_session(dev); | |
632248aa MC |
648 | |
649 | ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); | |
650 | ||
7970634b MC |
651 | shost = iscsi_session_to_shost(session); |
652 | ihost = shost->shost_data; | |
30a6c652 MC |
653 | |
654 | mutex_lock(&ihost->mutex); | |
7970634b MC |
655 | spin_lock_irqsave(&session->lock, flags); |
656 | if (session->state != ISCSI_SESSION_LOGGED_IN) { | |
657 | spin_unlock_irqrestore(&session->lock, flags); | |
632248aa | 658 | goto user_scan_exit; |
30a6c652 | 659 | } |
7970634b MC |
660 | id = session->target_id; |
661 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 662 | |
7970634b MC |
663 | if (id != ISCSI_MAX_TARGET) { |
664 | if ((scan_data->channel == SCAN_WILD_CARD || | |
665 | scan_data->channel == 0) && | |
666 | (scan_data->id == SCAN_WILD_CARD || | |
667 | scan_data->id == id)) | |
668 | scsi_scan_target(&session->dev, 0, id, | |
669 | scan_data->lun, 1); | |
670 | } | |
632248aa MC |
671 | |
672 | user_scan_exit: | |
7970634b | 673 | mutex_unlock(&ihost->mutex); |
632248aa | 674 | ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); |
30a6c652 MC |
675 | return 0; |
676 | } | |
677 | ||
7970634b MC |
678 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
679 | uint id, uint lun) | |
680 | { | |
681 | struct iscsi_scan_data scan_data; | |
682 | ||
683 | scan_data.channel = channel; | |
684 | scan_data.id = id; | |
685 | scan_data.lun = lun; | |
686 | ||
687 | return device_for_each_child(&shost->shost_gendev, &scan_data, | |
688 | iscsi_user_scan_session); | |
689 | } | |
690 | ||
bd976f62 MC |
691 | static void iscsi_scan_session(struct work_struct *work) |
692 | { | |
693 | struct iscsi_cls_session *session = | |
694 | container_of(work, struct iscsi_cls_session, scan_work); | |
8aae18ad | 695 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 696 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 697 | struct iscsi_scan_data scan_data; |
bd976f62 | 698 | |
7970634b MC |
699 | scan_data.channel = 0; |
700 | scan_data.id = SCAN_WILD_CARD; | |
701 | scan_data.lun = SCAN_WILD_CARD; | |
bd976f62 | 702 | |
7970634b | 703 | iscsi_user_scan_session(&session->dev, &scan_data); |
8aae18ad | 704 | atomic_dec(&ihost->nr_scans); |
bd976f62 MC |
705 | } |
706 | ||
c01be6dc MC |
707 | /** |
708 | * iscsi_block_scsi_eh - block scsi eh until session state has transistioned | |
e6d4ef45 | 709 | * @cmd: scsi cmd passed to scsi eh handler |
c01be6dc MC |
710 | * |
711 | * If the session is down this function will wait for the recovery | |
712 | * timer to fire or for the session to be logged back in. If the | |
713 | * recovery timer fires then FAST_IO_FAIL is returned. The caller | |
714 | * should pass this error value to the scsi eh. | |
715 | */ | |
716 | int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) | |
717 | { | |
718 | struct iscsi_cls_session *session = | |
719 | starget_to_session(scsi_target(cmd->device)); | |
720 | unsigned long flags; | |
721 | int ret = 0; | |
722 | ||
723 | spin_lock_irqsave(&session->lock, flags); | |
724 | while (session->state != ISCSI_SESSION_LOGGED_IN) { | |
725 | if (session->state == ISCSI_SESSION_FREE) { | |
726 | ret = FAST_IO_FAIL; | |
727 | break; | |
728 | } | |
729 | spin_unlock_irqrestore(&session->lock, flags); | |
730 | msleep(1000); | |
731 | spin_lock_irqsave(&session->lock, flags); | |
732 | } | |
733 | spin_unlock_irqrestore(&session->lock, flags); | |
734 | return ret; | |
735 | } | |
736 | EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); | |
737 | ||
c4028958 | 738 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 739 | { |
c4028958 DH |
740 | struct iscsi_cls_session *session = |
741 | container_of(work, struct iscsi_cls_session, | |
742 | recovery_work.work); | |
6eabafbe | 743 | unsigned long flags; |
30a6c652 | 744 | |
322d739d MC |
745 | iscsi_cls_session_printk(KERN_INFO, session, |
746 | "session recovery timed out after %d secs\n", | |
747 | session->recovery_tmo); | |
30a6c652 | 748 | |
6eabafbe MC |
749 | spin_lock_irqsave(&session->lock, flags); |
750 | switch (session->state) { | |
751 | case ISCSI_SESSION_FAILED: | |
752 | session->state = ISCSI_SESSION_FREE; | |
753 | break; | |
754 | case ISCSI_SESSION_LOGGED_IN: | |
755 | case ISCSI_SESSION_FREE: | |
756 | /* we raced with the unblock's flush */ | |
757 | spin_unlock_irqrestore(&session->lock, flags); | |
758 | return; | |
759 | } | |
760 | spin_unlock_irqrestore(&session->lock, flags); | |
761 | ||
30a6c652 MC |
762 | if (session->transport->session_recovery_timedout) |
763 | session->transport->session_recovery_timedout(session); | |
764 | ||
632248aa | 765 | ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); |
30a6c652 | 766 | scsi_target_unblock(&session->dev); |
632248aa | 767 | ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); |
30a6c652 MC |
768 | } |
769 | ||
45ab33b6 | 770 | static void __iscsi_unblock_session(struct work_struct *work) |
6eabafbe | 771 | { |
45ab33b6 MC |
772 | struct iscsi_cls_session *session = |
773 | container_of(work, struct iscsi_cls_session, | |
774 | unblock_work); | |
bd976f62 | 775 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 776 | struct iscsi_cls_host *ihost = shost->shost_data; |
6eabafbe MC |
777 | unsigned long flags; |
778 | ||
632248aa | 779 | ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); |
45ab33b6 MC |
780 | /* |
781 | * The recovery and unblock work get run from the same workqueue, | |
782 | * so try to cancel it if it was going to run after this unblock. | |
783 | */ | |
784 | cancel_delayed_work(&session->recovery_work); | |
6eabafbe MC |
785 | spin_lock_irqsave(&session->lock, flags); |
786 | session->state = ISCSI_SESSION_LOGGED_IN; | |
787 | spin_unlock_irqrestore(&session->lock, flags); | |
45ab33b6 MC |
788 | /* start IO */ |
789 | scsi_target_unblock(&session->dev); | |
8aae18ad MC |
790 | /* |
791 | * Only do kernel scanning if the driver is properly hooked into | |
792 | * the async scanning code (drivers like iscsi_tcp do login and | |
793 | * scanning from userspace). | |
794 | */ | |
795 | if (shost->hostt->scan_finished) { | |
06d25af4 | 796 | if (scsi_queue_work(shost, &session->scan_work)) |
8aae18ad MC |
797 | atomic_inc(&ihost->nr_scans); |
798 | } | |
632248aa | 799 | ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); |
6eabafbe | 800 | } |
45ab33b6 MC |
801 | |
802 | /** | |
803 | * iscsi_unblock_session - set a session as logged in and start IO. | |
804 | * @session: iscsi session | |
805 | * | |
806 | * Mark a session as ready to accept IO. | |
807 | */ | |
808 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
809 | { | |
810 | queue_work(iscsi_eh_timer_workq, &session->unblock_work); | |
811 | /* | |
812 | * make sure all the events have completed before tell the driver | |
813 | * it is safe | |
814 | */ | |
815 | flush_workqueue(iscsi_eh_timer_workq); | |
816 | } | |
30a6c652 MC |
817 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
818 | ||
45ab33b6 | 819 | static void __iscsi_block_session(struct work_struct *work) |
30a6c652 | 820 | { |
45ab33b6 MC |
821 | struct iscsi_cls_session *session = |
822 | container_of(work, struct iscsi_cls_session, | |
823 | block_work); | |
6eabafbe MC |
824 | unsigned long flags; |
825 | ||
632248aa | 826 | ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); |
6eabafbe MC |
827 | spin_lock_irqsave(&session->lock, flags); |
828 | session->state = ISCSI_SESSION_FAILED; | |
829 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 830 | scsi_target_block(&session->dev); |
632248aa | 831 | ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); |
fdd46dcb MC |
832 | if (session->recovery_tmo >= 0) |
833 | queue_delayed_work(iscsi_eh_timer_workq, | |
834 | &session->recovery_work, | |
835 | session->recovery_tmo * HZ); | |
30a6c652 | 836 | } |
45ab33b6 MC |
837 | |
838 | void iscsi_block_session(struct iscsi_cls_session *session) | |
839 | { | |
840 | queue_work(iscsi_eh_timer_workq, &session->block_work); | |
841 | } | |
30a6c652 MC |
842 | EXPORT_SYMBOL_GPL(iscsi_block_session); |
843 | ||
26974789 MC |
844 | static void __iscsi_unbind_session(struct work_struct *work) |
845 | { | |
846 | struct iscsi_cls_session *session = | |
847 | container_of(work, struct iscsi_cls_session, | |
848 | unbind_work); | |
849 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 850 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 851 | unsigned long flags; |
26974789 | 852 | |
632248aa MC |
853 | ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); |
854 | ||
26974789 MC |
855 | /* Prevent new scans and make sure scanning is not in progress */ |
856 | mutex_lock(&ihost->mutex); | |
7970634b MC |
857 | spin_lock_irqsave(&session->lock, flags); |
858 | if (session->target_id == ISCSI_MAX_TARGET) { | |
859 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
860 | mutex_unlock(&ihost->mutex); |
861 | return; | |
862 | } | |
7970634b MC |
863 | session->target_id = ISCSI_MAX_TARGET; |
864 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
865 | mutex_unlock(&ihost->mutex); |
866 | ||
867 | scsi_remove_target(&session->dev); | |
868 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
632248aa | 869 | ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); |
26974789 MC |
870 | } |
871 | ||
7b8631b5 | 872 | struct iscsi_cls_session * |
5d91e209 MC |
873 | iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
874 | int dd_size) | |
7b8631b5 MC |
875 | { |
876 | struct iscsi_cls_session *session; | |
7b8631b5 | 877 | |
5d91e209 | 878 | session = kzalloc(sizeof(*session) + dd_size, |
b5c7a12d | 879 | GFP_KERNEL); |
7b8631b5 | 880 | if (!session) |
f53a88da MC |
881 | return NULL; |
882 | ||
7b8631b5 | 883 | session->transport = transport; |
30a6c652 | 884 | session->recovery_tmo = 120; |
6eabafbe | 885 | session->state = ISCSI_SESSION_FREE; |
c4028958 | 886 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 | 887 | INIT_LIST_HEAD(&session->sess_list); |
45ab33b6 MC |
888 | INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
889 | INIT_WORK(&session->block_work, __iscsi_block_session); | |
26974789 | 890 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
bd976f62 | 891 | INIT_WORK(&session->scan_work, iscsi_scan_session); |
6eabafbe | 892 | spin_lock_init(&session->lock); |
7b8631b5 | 893 | |
6a8a0d36 MC |
894 | /* this is released in the dev's release function */ |
895 | scsi_host_get(shost); | |
8434aa8b MC |
896 | session->dev.parent = &shost->shost_gendev; |
897 | session->dev.release = iscsi_session_release; | |
898 | device_initialize(&session->dev); | |
5d91e209 | 899 | if (dd_size) |
b5c7a12d | 900 | session->dd_data = &session[1]; |
632248aa MC |
901 | |
902 | ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); | |
8434aa8b MC |
903 | return session; |
904 | } | |
905 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
906 | ||
7970634b MC |
907 | static int iscsi_get_next_target_id(struct device *dev, void *data) |
908 | { | |
909 | struct iscsi_cls_session *session; | |
910 | unsigned long flags; | |
911 | int err = 0; | |
912 | ||
913 | if (!iscsi_is_session_dev(dev)) | |
914 | return 0; | |
915 | ||
916 | session = iscsi_dev_to_session(dev); | |
917 | spin_lock_irqsave(&session->lock, flags); | |
918 | if (*((unsigned int *) data) == session->target_id) | |
919 | err = -EEXIST; | |
920 | spin_unlock_irqrestore(&session->lock, flags); | |
921 | return err; | |
922 | } | |
923 | ||
6a8a0d36 | 924 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
925 | { |
926 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 927 | struct iscsi_cls_host *ihost; |
26974789 | 928 | unsigned long flags; |
7970634b | 929 | unsigned int id = target_id; |
8434aa8b | 930 | int err; |
b5c7a12d | 931 | |
30a6c652 | 932 | ihost = shost->shost_data; |
41be1444 | 933 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
7970634b MC |
934 | |
935 | if (id == ISCSI_MAX_TARGET) { | |
936 | for (id = 0; id < ISCSI_MAX_TARGET; id++) { | |
937 | err = device_for_each_child(&shost->shost_gendev, &id, | |
938 | iscsi_get_next_target_id); | |
939 | if (!err) | |
940 | break; | |
941 | } | |
942 | ||
943 | if (id == ISCSI_MAX_TARGET) { | |
944 | iscsi_cls_session_printk(KERN_ERR, session, | |
945 | "Too many iscsi targets. Max " | |
946 | "number of targets is %d.\n", | |
947 | ISCSI_MAX_TARGET - 1); | |
24add1c4 | 948 | err = -EOVERFLOW; |
7970634b MC |
949 | goto release_host; |
950 | } | |
951 | } | |
952 | session->target_id = id; | |
30a6c652 | 953 | |
71610f55 | 954 | dev_set_name(&session->dev, "session%u", session->sid); |
8434aa8b | 955 | err = device_add(&session->dev); |
7b8631b5 | 956 | if (err) { |
322d739d MC |
957 | iscsi_cls_session_printk(KERN_ERR, session, |
958 | "could not register session's dev\n"); | |
8434aa8b | 959 | goto release_host; |
7b8631b5 MC |
960 | } |
961 | transport_register_device(&session->dev); | |
962 | ||
26974789 MC |
963 | spin_lock_irqsave(&sesslock, flags); |
964 | list_add(&session->sess_list, &sesslist); | |
965 | spin_unlock_irqrestore(&sesslock, flags); | |
966 | ||
26974789 | 967 | iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); |
632248aa | 968 | ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); |
8434aa8b | 969 | return 0; |
30a6c652 | 970 | |
8434aa8b MC |
971 | release_host: |
972 | scsi_host_put(shost); | |
973 | return err; | |
7b8631b5 | 974 | } |
8434aa8b | 975 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
976 | |
977 | /** | |
8434aa8b MC |
978 | * iscsi_create_session - create iscsi class session |
979 | * @shost: scsi host | |
980 | * @transport: iscsi transport | |
5d91e209 | 981 | * @dd_size: private driver data size |
eb44820c | 982 | * @target_id: which target |
7b8631b5 | 983 | * |
8434aa8b | 984 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 985 | */ |
8434aa8b | 986 | struct iscsi_cls_session * |
5d91e209 MC |
987 | iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
988 | int dd_size, unsigned int target_id) | |
8434aa8b MC |
989 | { |
990 | struct iscsi_cls_session *session; | |
991 | ||
5d91e209 | 992 | session = iscsi_alloc_session(shost, transport, dd_size); |
8434aa8b MC |
993 | if (!session) |
994 | return NULL; | |
995 | ||
6a8a0d36 | 996 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
997 | iscsi_free_session(session); |
998 | return NULL; | |
999 | } | |
1000 | return session; | |
1001 | } | |
1002 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
1003 | ||
26974789 MC |
1004 | static void iscsi_conn_release(struct device *dev) |
1005 | { | |
1006 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
1007 | struct device *parent = conn->dev.parent; | |
1008 | ||
632248aa | 1009 | ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); |
26974789 MC |
1010 | kfree(conn); |
1011 | put_device(parent); | |
1012 | } | |
1013 | ||
1014 | static int iscsi_is_conn_dev(const struct device *dev) | |
1015 | { | |
1016 | return dev->release == iscsi_conn_release; | |
1017 | } | |
1018 | ||
1019 | static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) | |
1020 | { | |
1021 | if (!iscsi_is_conn_dev(dev)) | |
1022 | return 0; | |
1023 | return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); | |
1024 | } | |
1025 | ||
8434aa8b | 1026 | void iscsi_remove_session(struct iscsi_cls_session *session) |
7b8631b5 | 1027 | { |
30a6c652 | 1028 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
26974789 MC |
1029 | unsigned long flags; |
1030 | int err; | |
1031 | ||
632248aa MC |
1032 | ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); |
1033 | ||
26974789 MC |
1034 | spin_lock_irqsave(&sesslock, flags); |
1035 | list_del(&session->sess_list); | |
1036 | spin_unlock_irqrestore(&sesslock, flags); | |
30a6c652 | 1037 | |
45ab33b6 MC |
1038 | /* make sure there are no blocks/unblocks queued */ |
1039 | flush_workqueue(iscsi_eh_timer_workq); | |
1040 | /* make sure the timedout callout is not running */ | |
1041 | if (!cancel_delayed_work(&session->recovery_work)) | |
1042 | flush_workqueue(iscsi_eh_timer_workq); | |
26974789 MC |
1043 | /* |
1044 | * If we are blocked let commands flow again. The lld or iscsi | |
1045 | * layer should set up the queuecommand to fail commands. | |
45ab33b6 MC |
1046 | * We assume that LLD will not be calling block/unblock while |
1047 | * removing the session. | |
26974789 | 1048 | */ |
6eabafbe MC |
1049 | spin_lock_irqsave(&session->lock, flags); |
1050 | session->state = ISCSI_SESSION_FREE; | |
1051 | spin_unlock_irqrestore(&session->lock, flags); | |
bd976f62 | 1052 | |
45ab33b6 MC |
1053 | scsi_target_unblock(&session->dev); |
1054 | /* flush running scans then delete devices */ | |
06d25af4 | 1055 | scsi_flush_work(shost); |
45ab33b6 | 1056 | __iscsi_unbind_session(&session->unbind_work); |
30a6c652 | 1057 | |
26974789 MC |
1058 | /* hw iscsi may not have removed all connections from session */ |
1059 | err = device_for_each_child(&session->dev, NULL, | |
1060 | iscsi_iter_destroy_conn_fn); | |
1061 | if (err) | |
322d739d MC |
1062 | iscsi_cls_session_printk(KERN_ERR, session, |
1063 | "Could not delete all connections " | |
1064 | "for session. Error %d.\n", err); | |
8434aa8b | 1065 | |
7b8631b5 | 1066 | transport_unregister_device(&session->dev); |
632248aa MC |
1067 | |
1068 | ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); | |
8434aa8b MC |
1069 | device_del(&session->dev); |
1070 | } | |
1071 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
1072 | ||
1073 | void iscsi_free_session(struct iscsi_cls_session *session) | |
1074 | { | |
632248aa | 1075 | ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); |
26974789 | 1076 | iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
8434aa8b | 1077 | put_device(&session->dev); |
7b8631b5 | 1078 | } |
8434aa8b MC |
1079 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
1080 | ||
1081 | /** | |
1082 | * iscsi_destroy_session - destroy iscsi session | |
1083 | * @session: iscsi_session | |
1084 | * | |
1085 | * Can be called by a LLD or iscsi_transport. There must not be | |
1086 | * any running connections. | |
eb44820c | 1087 | */ |
8434aa8b MC |
1088 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
1089 | { | |
1090 | iscsi_remove_session(session); | |
632248aa | 1091 | ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n"); |
8434aa8b MC |
1092 | iscsi_free_session(session); |
1093 | return 0; | |
1094 | } | |
7b8631b5 MC |
1095 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
1096 | ||
7b8631b5 MC |
1097 | /** |
1098 | * iscsi_create_conn - create iscsi class connection | |
1099 | * @session: iscsi cls session | |
5d91e209 | 1100 | * @dd_size: private driver data size |
7b8631b5 MC |
1101 | * @cid: connection id |
1102 | * | |
1103 | * This can be called from a LLD or iscsi_transport. The connection | |
1104 | * is child of the session so cid must be unique for all connections | |
1105 | * on the session. | |
b5c7a12d MC |
1106 | * |
1107 | * Since we do not support MCS, cid will normally be zero. In some cases | |
1108 | * for software iscsi we could be trying to preallocate a connection struct | |
1109 | * in which case there could be two connection structs and cid would be | |
1110 | * non-zero. | |
eb44820c | 1111 | */ |
7b8631b5 | 1112 | struct iscsi_cls_conn * |
5d91e209 | 1113 | iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) |
7b8631b5 MC |
1114 | { |
1115 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 | 1116 | struct iscsi_cls_conn *conn; |
26974789 | 1117 | unsigned long flags; |
7b8631b5 MC |
1118 | int err; |
1119 | ||
5d91e209 | 1120 | conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); |
7b8631b5 MC |
1121 | if (!conn) |
1122 | return NULL; | |
5d91e209 | 1123 | if (dd_size) |
7b8631b5 MC |
1124 | conn->dd_data = &conn[1]; |
1125 | ||
22a39fbb | 1126 | mutex_init(&conn->ep_mutex); |
7b8631b5 MC |
1127 | INIT_LIST_HEAD(&conn->conn_list); |
1128 | conn->transport = transport; | |
b5c7a12d | 1129 | conn->cid = cid; |
7b8631b5 MC |
1130 | |
1131 | /* this is released in the dev's release function */ | |
1132 | if (!get_device(&session->dev)) | |
43a145a3 | 1133 | goto free_conn; |
b5c7a12d | 1134 | |
71610f55 | 1135 | dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); |
7b8631b5 MC |
1136 | conn->dev.parent = &session->dev; |
1137 | conn->dev.release = iscsi_conn_release; | |
1138 | err = device_register(&conn->dev); | |
1139 | if (err) { | |
322d739d MC |
1140 | iscsi_cls_session_printk(KERN_ERR, session, "could not " |
1141 | "register connection's dev\n"); | |
7b8631b5 MC |
1142 | goto release_parent_ref; |
1143 | } | |
1144 | transport_register_device(&conn->dev); | |
26974789 MC |
1145 | |
1146 | spin_lock_irqsave(&connlock, flags); | |
1147 | list_add(&conn->conn_list, &connlist); | |
26974789 | 1148 | spin_unlock_irqrestore(&connlock, flags); |
632248aa MC |
1149 | |
1150 | ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); | |
7b8631b5 MC |
1151 | return conn; |
1152 | ||
1153 | release_parent_ref: | |
1154 | put_device(&session->dev); | |
1155 | free_conn: | |
1156 | kfree(conn); | |
1157 | return NULL; | |
1158 | } | |
1159 | ||
1160 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
1161 | ||
1162 | /** | |
1163 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 1164 | * @conn: iscsi cls session |
7b8631b5 | 1165 | * |
26974789 | 1166 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 1167 | */ |
7b8631b5 MC |
1168 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
1169 | { | |
26974789 MC |
1170 | unsigned long flags; |
1171 | ||
1172 | spin_lock_irqsave(&connlock, flags); | |
26974789 MC |
1173 | list_del(&conn->conn_list); |
1174 | spin_unlock_irqrestore(&connlock, flags); | |
1175 | ||
7b8631b5 | 1176 | transport_unregister_device(&conn->dev); |
632248aa | 1177 | ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); |
7b8631b5 MC |
1178 | device_unregister(&conn->dev); |
1179 | return 0; | |
1180 | } | |
7b8631b5 MC |
1181 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
1182 | ||
7b8631b5 MC |
1183 | /* |
1184 | * iscsi interface functions | |
1185 | */ | |
0896b752 AA |
1186 | static struct iscsi_internal * |
1187 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
1188 | { | |
1189 | struct iscsi_internal *priv; | |
1190 | unsigned long flags; | |
1191 | ||
1192 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1193 | list_for_each_entry(priv, &iscsi_transports, list) { | |
1194 | if (tt == priv->iscsi_transport) { | |
1195 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1196 | return priv; | |
1197 | } | |
1198 | } | |
1199 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1200 | return NULL; | |
1201 | } | |
1da177e4 | 1202 | |
53cb8a1f | 1203 | static int |
43514774 | 1204 | iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) |
53cb8a1f | 1205 | { |
43514774 | 1206 | return nlmsg_multicast(nls, skb, 0, group, gfp); |
1da177e4 | 1207 | } |
1da177e4 | 1208 | |
7b7232f3 | 1209 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 1210 | char *data, uint32_t data_size) |
1da177e4 | 1211 | { |
0896b752 AA |
1212 | struct nlmsghdr *nlh; |
1213 | struct sk_buff *skb; | |
1214 | struct iscsi_uevent *ev; | |
0896b752 | 1215 | char *pdu; |
790f39a2 | 1216 | struct iscsi_internal *priv; |
0896b752 AA |
1217 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
1218 | data_size); | |
1219 | ||
790f39a2 MC |
1220 | priv = iscsi_if_transport_lookup(conn->transport); |
1221 | if (!priv) | |
1222 | return -EINVAL; | |
1223 | ||
43a145a3 | 1224 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1225 | if (!skb) { |
e5bd7b54 | 1226 | iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); |
322d739d MC |
1227 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
1228 | "control PDU: OOM\n"); | |
0896b752 AA |
1229 | return -ENOMEM; |
1230 | } | |
1da177e4 | 1231 | |
43514774 | 1232 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1233 | ev = NLMSG_DATA(nlh); |
1234 | memset(ev, 0, sizeof(*ev)); | |
1235 | ev->transport_handle = iscsi_handle(conn->transport); | |
1236 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
1237 | ev->r.recv_req.cid = conn->cid; |
1238 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
1239 | pdu = (char*)ev + sizeof(*ev); |
1240 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
1241 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 1242 | |
43514774 | 1243 | return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
1da177e4 | 1244 | } |
0896b752 | 1245 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 1246 | |
43514774 MC |
1247 | int iscsi_offload_mesg(struct Scsi_Host *shost, |
1248 | struct iscsi_transport *transport, uint32_t type, | |
1249 | char *data, uint16_t data_size) | |
1250 | { | |
1251 | struct nlmsghdr *nlh; | |
1252 | struct sk_buff *skb; | |
1253 | struct iscsi_uevent *ev; | |
1254 | int len = NLMSG_SPACE(sizeof(*ev) + data_size); | |
1255 | ||
a541f840 | 1256 | skb = alloc_skb(len, GFP_ATOMIC); |
43514774 MC |
1257 | if (!skb) { |
1258 | printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); | |
1259 | return -ENOMEM; | |
1260 | } | |
1261 | ||
1262 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); | |
1263 | ev = NLMSG_DATA(nlh); | |
1264 | memset(ev, 0, sizeof(*ev)); | |
1265 | ev->type = type; | |
1266 | ev->transport_handle = iscsi_handle(transport); | |
1267 | switch (type) { | |
1268 | case ISCSI_KEVENT_PATH_REQ: | |
1269 | ev->r.req_path.host_no = shost->host_no; | |
1270 | break; | |
1271 | case ISCSI_KEVENT_IF_DOWN: | |
1272 | ev->r.notify_if_down.host_no = shost->host_no; | |
1273 | break; | |
1274 | } | |
1275 | ||
1276 | memcpy((char *)ev + sizeof(*ev), data, data_size); | |
1277 | ||
a541f840 | 1278 | return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); |
43514774 MC |
1279 | } |
1280 | EXPORT_SYMBOL_GPL(iscsi_offload_mesg); | |
1281 | ||
e5bd7b54 | 1282 | void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 1283 | { |
0896b752 AA |
1284 | struct nlmsghdr *nlh; |
1285 | struct sk_buff *skb; | |
1286 | struct iscsi_uevent *ev; | |
790f39a2 | 1287 | struct iscsi_internal *priv; |
0896b752 AA |
1288 | int len = NLMSG_SPACE(sizeof(*ev)); |
1289 | ||
790f39a2 MC |
1290 | priv = iscsi_if_transport_lookup(conn->transport); |
1291 | if (!priv) | |
1292 | return; | |
1293 | ||
43a145a3 | 1294 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1295 | if (!skb) { |
322d739d MC |
1296 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
1297 | "conn error (%d)\n", error); | |
0896b752 AA |
1298 | return; |
1299 | } | |
1300 | ||
43514774 | 1301 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1302 | ev = NLMSG_DATA(nlh); |
1303 | ev->transport_handle = iscsi_handle(conn->transport); | |
1304 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 1305 | ev->r.connerror.error = error; |
b5c7a12d MC |
1306 | ev->r.connerror.cid = conn->cid; |
1307 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 1308 | |
43514774 | 1309 | iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
1da177e4 | 1310 | |
322d739d MC |
1311 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
1312 | error); | |
0896b752 | 1313 | } |
e5bd7b54 | 1314 | EXPORT_SYMBOL_GPL(iscsi_conn_error_event); |
0896b752 AA |
1315 | |
1316 | static int | |
43514774 MC |
1317 | iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi, |
1318 | void *payload, int size) | |
0896b752 AA |
1319 | { |
1320 | struct sk_buff *skb; | |
1321 | struct nlmsghdr *nlh; | |
1322 | int len = NLMSG_SPACE(size); | |
1323 | int flags = multi ? NLM_F_MULTI : 0; | |
1324 | int t = done ? NLMSG_DONE : type; | |
1325 | ||
43a145a3 | 1326 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
1327 | if (!skb) { |
1328 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
1329 | return -ENOMEM; | |
1330 | } | |
0896b752 | 1331 | |
43514774 | 1332 | nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1333 | nlh->nlmsg_flags = flags; |
1334 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43514774 | 1335 | return iscsi_multicast_skb(skb, group, GFP_ATOMIC); |
1da177e4 | 1336 | } |
1da177e4 | 1337 | |
7b8631b5 | 1338 | static int |
5b940adf | 1339 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
1340 | { |
1341 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1342 | struct iscsi_stats *stats; | |
1343 | struct sk_buff *skbstat; | |
1344 | struct iscsi_cls_conn *conn; | |
1345 | struct nlmsghdr *nlhstat; | |
1346 | struct iscsi_uevent *evstat; | |
790f39a2 | 1347 | struct iscsi_internal *priv; |
7b8631b5 MC |
1348 | int len = NLMSG_SPACE(sizeof(*ev) + |
1349 | sizeof(struct iscsi_stats) + | |
1350 | sizeof(struct iscsi_stats_custom) * | |
1351 | ISCSI_STATS_CUSTOM_MAX); | |
1352 | int err = 0; | |
0896b752 | 1353 | |
790f39a2 MC |
1354 | priv = iscsi_if_transport_lookup(transport); |
1355 | if (!priv) | |
1356 | return -EINVAL; | |
1357 | ||
b5c7a12d | 1358 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
1359 | if (!conn) |
1360 | return -EEXIST; | |
0896b752 | 1361 | |
7b8631b5 MC |
1362 | do { |
1363 | int actual_size; | |
0896b752 | 1364 | |
43a145a3 | 1365 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 | 1366 | if (!skbstat) { |
322d739d MC |
1367 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
1368 | "deliver stats: OOM\n"); | |
7b8631b5 MC |
1369 | return -ENOMEM; |
1370 | } | |
1371 | ||
43514774 | 1372 | nlhstat = __nlmsg_put(skbstat, 0, 0, 0, |
7b8631b5 MC |
1373 | (len - sizeof(*nlhstat)), 0); |
1374 | evstat = NLMSG_DATA(nlhstat); | |
1375 | memset(evstat, 0, sizeof(*evstat)); | |
1376 | evstat->transport_handle = iscsi_handle(conn->transport); | |
1377 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
1378 | evstat->u.get_stats.cid = |
1379 | ev->u.get_stats.cid; | |
1380 | evstat->u.get_stats.sid = | |
1381 | ev->u.get_stats.sid; | |
7b8631b5 MC |
1382 | stats = (struct iscsi_stats *) |
1383 | ((char*)evstat + sizeof(*evstat)); | |
1384 | memset(stats, 0, sizeof(*stats)); | |
1385 | ||
7b7232f3 | 1386 | transport->get_stats(conn, stats); |
7b8631b5 MC |
1387 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
1388 | sizeof(struct iscsi_stats) + | |
1389 | sizeof(struct iscsi_stats_custom) * | |
1390 | stats->custom_length); | |
1391 | actual_size -= sizeof(*nlhstat); | |
1392 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 1393 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
1394 | nlhstat->nlmsg_len = actual_size; |
1395 | ||
43514774 MC |
1396 | err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, |
1397 | GFP_ATOMIC); | |
7b8631b5 MC |
1398 | } while (err < 0 && err != -ECONNREFUSED); |
1399 | ||
1400 | return err; | |
0896b752 AA |
1401 | } |
1402 | ||
53cb8a1f | 1403 | /** |
26974789 MC |
1404 | * iscsi_session_event - send session destr. completion event |
1405 | * @session: iscsi class session | |
1406 | * @event: type of event | |
eb44820c | 1407 | */ |
26974789 MC |
1408 | int iscsi_session_event(struct iscsi_cls_session *session, |
1409 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
1410 | { |
1411 | struct iscsi_internal *priv; | |
53cb8a1f MC |
1412 | struct Scsi_Host *shost; |
1413 | struct iscsi_uevent *ev; | |
1414 | struct sk_buff *skb; | |
1415 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
1416 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
1417 | ||
26974789 | 1418 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
1419 | if (!priv) |
1420 | return -EINVAL; | |
53cb8a1f MC |
1421 | shost = iscsi_session_to_shost(session); |
1422 | ||
43a145a3 | 1423 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 1424 | if (!skb) { |
322d739d MC |
1425 | iscsi_cls_session_printk(KERN_ERR, session, |
1426 | "Cannot notify userspace of session " | |
1427 | "event %u\n", event); | |
53cb8a1f MC |
1428 | return -ENOMEM; |
1429 | } | |
1430 | ||
43514774 | 1431 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
53cb8a1f | 1432 | ev = NLMSG_DATA(nlh); |
26974789 | 1433 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 1434 | |
26974789 MC |
1435 | ev->type = event; |
1436 | switch (event) { | |
1437 | case ISCSI_KEVENT_DESTROY_SESSION: | |
1438 | ev->r.d_session.host_no = shost->host_no; | |
1439 | ev->r.d_session.sid = session->sid; | |
1440 | break; | |
1441 | case ISCSI_KEVENT_CREATE_SESSION: | |
1442 | ev->r.c_session_ret.host_no = shost->host_no; | |
1443 | ev->r.c_session_ret.sid = session->sid; | |
1444 | break; | |
1445 | case ISCSI_KEVENT_UNBIND_SESSION: | |
1446 | ev->r.unbind_session.host_no = shost->host_no; | |
1447 | ev->r.unbind_session.sid = session->sid; | |
1448 | break; | |
1449 | default: | |
322d739d MC |
1450 | iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
1451 | "%u.\n", event); | |
26974789 | 1452 | kfree_skb(skb); |
53cb8a1f | 1453 | return -EINVAL; |
53cb8a1f MC |
1454 | } |
1455 | ||
53cb8a1f MC |
1456 | /* |
1457 | * this will occur if the daemon is not up, so we just warn | |
1458 | * the user and when the daemon is restarted it will handle it | |
1459 | */ | |
43514774 | 1460 | rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); |
ff491a73 | 1461 | if (rc == -ESRCH) |
322d739d MC |
1462 | iscsi_cls_session_printk(KERN_ERR, session, |
1463 | "Cannot notify userspace of session " | |
1464 | "event %u. Check iscsi daemon\n", | |
1465 | event); | |
632248aa MC |
1466 | |
1467 | ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", | |
1468 | event, rc); | |
53cb8a1f MC |
1469 | return rc; |
1470 | } | |
26974789 | 1471 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 1472 | |
0896b752 | 1473 | static int |
d82ff9be MC |
1474 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, |
1475 | struct iscsi_uevent *ev, uint32_t initial_cmdsn, | |
40753caa | 1476 | uint16_t cmds_max, uint16_t queue_depth) |
0896b752 AA |
1477 | { |
1478 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 1479 | struct iscsi_cls_session *session; |
5e7facb7 | 1480 | struct Scsi_Host *shost; |
0896b752 | 1481 | |
d82ff9be | 1482 | session = transport->create_session(ep, cmds_max, queue_depth, |
5e7facb7 | 1483 | initial_cmdsn); |
7b7232f3 | 1484 | if (!session) |
7b8631b5 | 1485 | return -ENOMEM; |
0896b752 | 1486 | |
5e7facb7 MC |
1487 | shost = iscsi_session_to_shost(session); |
1488 | ev->r.c_session_ret.host_no = shost->host_no; | |
b5c7a12d | 1489 | ev->r.c_session_ret.sid = session->sid; |
632248aa MC |
1490 | ISCSI_DBG_TRANS_SESSION(session, |
1491 | "Completed creating transport session\n"); | |
0896b752 | 1492 | return 0; |
0896b752 AA |
1493 | } |
1494 | ||
1495 | static int | |
7b7232f3 | 1496 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 1497 | { |
7b8631b5 | 1498 | struct iscsi_cls_conn *conn; |
7b7232f3 | 1499 | struct iscsi_cls_session *session; |
7b8631b5 | 1500 | |
b5c7a12d MC |
1501 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
1502 | if (!session) { | |
322d739d | 1503 | printk(KERN_ERR "iscsi: invalid session %d.\n", |
b5c7a12d | 1504 | ev->u.c_conn.sid); |
7b8631b5 | 1505 | return -EINVAL; |
b5c7a12d | 1506 | } |
0896b752 | 1507 | |
7b7232f3 | 1508 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d | 1509 | if (!conn) { |
322d739d MC |
1510 | iscsi_cls_session_printk(KERN_ERR, session, |
1511 | "couldn't create a new connection."); | |
7b7232f3 | 1512 | return -ENOMEM; |
b5c7a12d | 1513 | } |
0896b752 | 1514 | |
b5c7a12d MC |
1515 | ev->r.c_conn_ret.sid = session->sid; |
1516 | ev->r.c_conn_ret.cid = conn->cid; | |
632248aa MC |
1517 | |
1518 | ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); | |
0896b752 | 1519 | return 0; |
1da177e4 LT |
1520 | } |
1521 | ||
0896b752 AA |
1522 | static int |
1523 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1524 | { | |
7b8631b5 | 1525 | struct iscsi_cls_conn *conn; |
0896b752 | 1526 | |
b5c7a12d | 1527 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 1528 | if (!conn) |
7b8631b5 | 1529 | return -EINVAL; |
0896b752 | 1530 | |
632248aa | 1531 | ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); |
7b8631b5 MC |
1532 | if (transport->destroy_conn) |
1533 | transport->destroy_conn(conn); | |
632248aa | 1534 | |
7b8631b5 | 1535 | return 0; |
0896b752 AA |
1536 | } |
1537 | ||
fd7255f5 MC |
1538 | static int |
1539 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1540 | { | |
1541 | char *data = (char*)ev + sizeof(*ev); | |
1542 | struct iscsi_cls_conn *conn; | |
1543 | struct iscsi_cls_session *session; | |
a54a52ca | 1544 | int err = 0, value = 0; |
fd7255f5 MC |
1545 | |
1546 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
1547 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
1548 | if (!conn || !session) | |
1549 | return -EINVAL; | |
1550 | ||
1551 | switch (ev->u.set_param.param) { | |
30a6c652 | 1552 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 1553 | sscanf(data, "%d", &value); |
fdd46dcb | 1554 | session->recovery_tmo = value; |
30a6c652 | 1555 | break; |
fd7255f5 | 1556 | default: |
a54a52ca MC |
1557 | err = transport->set_param(conn, ev->u.set_param.param, |
1558 | data, ev->u.set_param.len); | |
fd7255f5 MC |
1559 | } |
1560 | ||
1561 | return err; | |
1562 | } | |
1563 | ||
10eb0f01 MC |
1564 | static int iscsi_if_ep_connect(struct iscsi_transport *transport, |
1565 | struct iscsi_uevent *ev, int msg_type) | |
1566 | { | |
1567 | struct iscsi_endpoint *ep; | |
1568 | struct sockaddr *dst_addr; | |
1569 | struct Scsi_Host *shost = NULL; | |
1570 | int non_blocking, err = 0; | |
1571 | ||
1572 | if (!transport->ep_connect) | |
1573 | return -EINVAL; | |
1574 | ||
1575 | if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { | |
1576 | shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); | |
1577 | if (!shost) { | |
1578 | printk(KERN_ERR "ep connect failed. Could not find " | |
1579 | "host no %u\n", | |
1580 | ev->u.ep_connect_through_host.host_no); | |
1581 | return -ENODEV; | |
1582 | } | |
1583 | non_blocking = ev->u.ep_connect_through_host.non_blocking; | |
1584 | } else | |
1585 | non_blocking = ev->u.ep_connect.non_blocking; | |
1586 | ||
1587 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
1588 | ep = transport->ep_connect(shost, dst_addr, non_blocking); | |
1589 | if (IS_ERR(ep)) { | |
1590 | err = PTR_ERR(ep); | |
1591 | goto release_host; | |
1592 | } | |
1593 | ||
1594 | ev->r.ep_connect_ret.handle = ep->id; | |
1595 | release_host: | |
1596 | if (shost) | |
1597 | scsi_host_put(shost); | |
1598 | return err; | |
1599 | } | |
1600 | ||
22a39fbb MC |
1601 | static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, |
1602 | u64 ep_handle) | |
1603 | { | |
1604 | struct iscsi_cls_conn *conn; | |
1605 | struct iscsi_endpoint *ep; | |
1606 | ||
1607 | if (!transport->ep_disconnect) | |
1608 | return -EINVAL; | |
1609 | ||
1610 | ep = iscsi_lookup_endpoint(ep_handle); | |
1611 | if (!ep) | |
1612 | return -EINVAL; | |
1613 | conn = ep->conn; | |
1614 | if (conn) { | |
1615 | mutex_lock(&conn->ep_mutex); | |
1616 | conn->ep = NULL; | |
1617 | mutex_unlock(&conn->ep_mutex); | |
1618 | } | |
1619 | ||
1620 | transport->ep_disconnect(ep); | |
1621 | return 0; | |
1622 | } | |
1623 | ||
264faaaa OG |
1624 | static int |
1625 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
1626 | struct iscsi_uevent *ev, int msg_type) | |
1627 | { | |
d82ff9be | 1628 | struct iscsi_endpoint *ep; |
264faaaa OG |
1629 | int rc = 0; |
1630 | ||
1631 | switch (msg_type) { | |
10eb0f01 | 1632 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: |
264faaaa | 1633 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
10eb0f01 | 1634 | rc = iscsi_if_ep_connect(transport, ev, msg_type); |
264faaaa OG |
1635 | break; |
1636 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1637 | if (!transport->ep_poll) | |
1638 | return -EINVAL; | |
1639 | ||
d82ff9be MC |
1640 | ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); |
1641 | if (!ep) | |
1642 | return -EINVAL; | |
1643 | ||
1644 | ev->r.retcode = transport->ep_poll(ep, | |
264faaaa OG |
1645 | ev->u.ep_poll.timeout_ms); |
1646 | break; | |
1647 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
22a39fbb MC |
1648 | rc = iscsi_if_ep_disconnect(transport, |
1649 | ev->u.ep_disconnect.ep_handle); | |
264faaaa OG |
1650 | break; |
1651 | } | |
1652 | return rc; | |
1653 | } | |
1654 | ||
01cb225d MC |
1655 | static int |
1656 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
1657 | struct iscsi_uevent *ev) | |
1658 | { | |
2174a04e | 1659 | struct Scsi_Host *shost; |
01cb225d | 1660 | struct sockaddr *dst_addr; |
2174a04e | 1661 | int err; |
01cb225d MC |
1662 | |
1663 | if (!transport->tgt_dscvr) | |
1664 | return -EINVAL; | |
1665 | ||
2174a04e | 1666 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
315cb0ad | 1667 | if (!shost) { |
2174a04e MC |
1668 | printk(KERN_ERR "target discovery could not find host no %u\n", |
1669 | ev->u.tgt_dscvr.host_no); | |
1670 | return -ENODEV; | |
1671 | } | |
1672 | ||
1673 | ||
01cb225d | 1674 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
1675 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
1676 | ev->u.tgt_dscvr.enable, dst_addr); | |
1677 | scsi_host_put(shost); | |
1678 | return err; | |
01cb225d MC |
1679 | } |
1680 | ||
1d9bf13a MC |
1681 | static int |
1682 | iscsi_set_host_param(struct iscsi_transport *transport, | |
1683 | struct iscsi_uevent *ev) | |
1684 | { | |
1685 | char *data = (char*)ev + sizeof(*ev); | |
1686 | struct Scsi_Host *shost; | |
1687 | int err; | |
1688 | ||
1689 | if (!transport->set_host_param) | |
1690 | return -ENOSYS; | |
1691 | ||
1692 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
315cb0ad | 1693 | if (!shost) { |
1d9bf13a MC |
1694 | printk(KERN_ERR "set_host_param could not find host no %u\n", |
1695 | ev->u.set_host_param.host_no); | |
1696 | return -ENODEV; | |
1697 | } | |
1698 | ||
1699 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1700 | data, ev->u.set_host_param.len); | |
1701 | scsi_host_put(shost); | |
1702 | return err; | |
1703 | } | |
1704 | ||
0896b752 | 1705 | static int |
43514774 MC |
1706 | iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
1707 | { | |
1708 | struct Scsi_Host *shost; | |
1709 | struct iscsi_path *params; | |
1710 | int err; | |
1711 | ||
1712 | if (!transport->set_path) | |
1713 | return -ENOSYS; | |
1714 | ||
1715 | shost = scsi_host_lookup(ev->u.set_path.host_no); | |
1716 | if (!shost) { | |
1717 | printk(KERN_ERR "set path could not find host no %u\n", | |
1718 | ev->u.set_path.host_no); | |
1719 | return -ENODEV; | |
1720 | } | |
1721 | ||
1722 | params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); | |
1723 | err = transport->set_path(shost, params); | |
1724 | ||
1725 | scsi_host_put(shost); | |
1726 | return err; | |
1727 | } | |
1728 | ||
56c155b5 MC |
1729 | static int |
1730 | iscsi_set_iface_params(struct iscsi_transport *transport, | |
1731 | struct iscsi_uevent *ev) | |
1732 | { | |
1733 | char *data = (char *)ev + sizeof(*ev); | |
1734 | struct Scsi_Host *shost; | |
1735 | int err; | |
1736 | ||
1737 | if (!transport->set_iface_param) | |
1738 | return -ENOSYS; | |
1739 | ||
1740 | shost = scsi_host_lookup(ev->u.set_iface_params.host_no); | |
1741 | if (!shost) { | |
1742 | printk(KERN_ERR "set_iface_params could not find host no %u\n", | |
1743 | ev->u.set_iface_params.host_no); | |
1744 | return -ENODEV; | |
1745 | } | |
1746 | ||
1747 | err = transport->set_iface_param(shost, data, | |
1748 | ev->u.set_iface_params.count); | |
1749 | scsi_host_put(shost); | |
1750 | return err; | |
1751 | } | |
1752 | ||
43514774 MC |
1753 | static int |
1754 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) | |
0896b752 AA |
1755 | { |
1756 | int err = 0; | |
1757 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1758 | struct iscsi_transport *transport = NULL; | |
1759 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1760 | struct iscsi_cls_session *session; |
1761 | struct iscsi_cls_conn *conn; | |
d82ff9be | 1762 | struct iscsi_endpoint *ep = NULL; |
0896b752 | 1763 | |
43514774 MC |
1764 | if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) |
1765 | *group = ISCSI_NL_GRP_UIP; | |
1766 | else | |
1767 | *group = ISCSI_NL_GRP_ISCSID; | |
1768 | ||
0896b752 AA |
1769 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1770 | if (!priv) | |
1771 | return -EINVAL; | |
1772 | transport = priv->iscsi_transport; | |
1773 | ||
7b7232f3 MC |
1774 | if (!try_module_get(transport->owner)) |
1775 | return -EINVAL; | |
1776 | ||
0896b752 AA |
1777 | switch (nlh->nlmsg_type) { |
1778 | case ISCSI_UEVENT_CREATE_SESSION: | |
d82ff9be | 1779 | err = iscsi_if_create_session(priv, ep, ev, |
40753caa MC |
1780 | ev->u.c_session.initial_cmdsn, |
1781 | ev->u.c_session.cmds_max, | |
1782 | ev->u.c_session.queue_depth); | |
1783 | break; | |
1784 | case ISCSI_UEVENT_CREATE_BOUND_SESSION: | |
d82ff9be | 1785 | ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); |
c95fddc7 MC |
1786 | if (!ep) { |
1787 | err = -EINVAL; | |
1788 | break; | |
1789 | } | |
d82ff9be MC |
1790 | |
1791 | err = iscsi_if_create_session(priv, ep, ev, | |
40753caa MC |
1792 | ev->u.c_bound_session.initial_cmdsn, |
1793 | ev->u.c_bound_session.cmds_max, | |
1794 | ev->u.c_bound_session.queue_depth); | |
0896b752 AA |
1795 | break; |
1796 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1797 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1798 | if (session) |
7b7232f3 | 1799 | transport->destroy_session(session); |
26974789 MC |
1800 | else |
1801 | err = -EINVAL; | |
1802 | break; | |
1803 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1804 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1805 | if (session) | |
06d25af4 MC |
1806 | scsi_queue_work(iscsi_session_to_shost(session), |
1807 | &session->unbind_work); | |
26974789 | 1808 | else |
7b7232f3 | 1809 | err = -EINVAL; |
0896b752 AA |
1810 | break; |
1811 | case ISCSI_UEVENT_CREATE_CONN: | |
1812 | err = iscsi_if_create_conn(transport, ev); | |
1813 | break; | |
1814 | case ISCSI_UEVENT_DESTROY_CONN: | |
1815 | err = iscsi_if_destroy_conn(transport, ev); | |
1816 | break; | |
1817 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1818 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1819 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 | 1820 | |
22a39fbb MC |
1821 | if (conn && conn->ep) |
1822 | iscsi_if_ep_disconnect(transport, conn->ep->id); | |
1823 | ||
1824 | if (!session || !conn) { | |
7b7232f3 | 1825 | err = -EINVAL; |
22a39fbb MC |
1826 | break; |
1827 | } | |
1828 | ||
1829 | ev->r.retcode = transport->bind_conn(session, conn, | |
1830 | ev->u.b_conn.transport_eph, | |
1831 | ev->u.b_conn.is_leading); | |
1832 | if (ev->r.retcode || !transport->ep_connect) | |
1833 | break; | |
1834 | ||
1835 | ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); | |
1836 | if (ep) { | |
1837 | ep->conn = conn; | |
1838 | ||
1839 | mutex_lock(&conn->ep_mutex); | |
1840 | conn->ep = ep; | |
1841 | mutex_unlock(&conn->ep_mutex); | |
1842 | } else | |
1843 | iscsi_cls_conn_printk(KERN_ERR, conn, | |
1844 | "Could not set ep conn " | |
1845 | "binding\n"); | |
0896b752 AA |
1846 | break; |
1847 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 1848 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
1849 | break; |
1850 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 1851 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
1852 | if (conn) |
1853 | ev->r.retcode = transport->start_conn(conn); | |
1854 | else | |
1855 | err = -EINVAL; | |
0896b752 AA |
1856 | break; |
1857 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 1858 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
1859 | if (conn) |
1860 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
1861 | else | |
1862 | err = -EINVAL; | |
0896b752 AA |
1863 | break; |
1864 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 1865 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
1866 | if (conn) |
1867 | ev->r.retcode = transport->send_pdu(conn, | |
1868 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
1869 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
1870 | ev->u.send_pdu.data_size); | |
1871 | else | |
1872 | err = -EINVAL; | |
0896b752 AA |
1873 | break; |
1874 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 1875 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 1876 | break; |
264faaaa OG |
1877 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
1878 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1879 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
10eb0f01 | 1880 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: |
264faaaa OG |
1881 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); |
1882 | break; | |
01cb225d MC |
1883 | case ISCSI_UEVENT_TGT_DSCVR: |
1884 | err = iscsi_tgt_dscvr(transport, ev); | |
1885 | break; | |
1d9bf13a MC |
1886 | case ISCSI_UEVENT_SET_HOST_PARAM: |
1887 | err = iscsi_set_host_param(transport, ev); | |
1888 | break; | |
43514774 MC |
1889 | case ISCSI_UEVENT_PATH_UPDATE: |
1890 | err = iscsi_set_path(transport, ev); | |
1891 | break; | |
56c155b5 MC |
1892 | case ISCSI_UEVENT_SET_IFACE_PARAMS: |
1893 | err = iscsi_set_iface_params(transport, ev); | |
1894 | break; | |
0896b752 | 1895 | default: |
1d9bf13a | 1896 | err = -ENOSYS; |
0896b752 AA |
1897 | break; |
1898 | } | |
1899 | ||
7b7232f3 | 1900 | module_put(transport->owner); |
0896b752 AA |
1901 | return err; |
1902 | } | |
1903 | ||
b5c7a12d | 1904 | /* |
cd40b7d3 DL |
1905 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
1906 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 1907 | */ |
0896b752 | 1908 | static void |
cd40b7d3 | 1909 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 1910 | { |
0b950672 | 1911 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
1912 | while (skb->len >= NLMSG_SPACE(0)) { |
1913 | int err; | |
1914 | uint32_t rlen; | |
1915 | struct nlmsghdr *nlh; | |
1916 | struct iscsi_uevent *ev; | |
43514774 | 1917 | uint32_t group; |
cd40b7d3 DL |
1918 | |
1919 | nlh = nlmsg_hdr(skb); | |
1920 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
1921 | skb->len < nlh->nlmsg_len) { | |
1922 | break; | |
ee7f8e40 | 1923 | } |
ee7f8e40 | 1924 | |
cd40b7d3 DL |
1925 | ev = NLMSG_DATA(nlh); |
1926 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
1927 | if (rlen > skb->len) | |
1928 | rlen = skb->len; | |
0896b752 | 1929 | |
43514774 | 1930 | err = iscsi_if_recv_msg(skb, nlh, &group); |
cd40b7d3 DL |
1931 | if (err) { |
1932 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
1933 | ev->iferror = err; | |
0896b752 | 1934 | } |
cd40b7d3 DL |
1935 | do { |
1936 | /* | |
1937 | * special case for GET_STATS: | |
1938 | * on success - sending reply and stats from | |
1939 | * inside of if_recv_msg(), | |
1940 | * on error - fall through. | |
1941 | */ | |
1942 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
1943 | break; | |
43514774 | 1944 | err = iscsi_if_send_reply(group, nlh->nlmsg_seq, |
cd40b7d3 DL |
1945 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); |
1946 | } while (err < 0 && err != -ECONNREFUSED); | |
1947 | skb_pull(skb, rlen); | |
0896b752 | 1948 | } |
0b950672 | 1949 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 1950 | } |
1da177e4 | 1951 | |
fd7255f5 | 1952 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
ee959b00 | 1953 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
fd7255f5 MC |
1954 | __ATTR(_name,_mode,_show,_store) |
1955 | ||
1da177e4 | 1956 | /* |
0896b752 | 1957 | * iSCSI connection attrs |
1da177e4 | 1958 | */ |
a54a52ca | 1959 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 1960 | static ssize_t \ |
ee959b00 TJ |
1961 | show_conn_param_##param(struct device *dev, \ |
1962 | struct device_attribute *attr, char *buf) \ | |
0896b752 | 1963 | { \ |
ee959b00 | 1964 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ |
7b8631b5 | 1965 | struct iscsi_transport *t = conn->transport; \ |
a54a52ca | 1966 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
1967 | } |
1968 | ||
a54a52ca MC |
1969 | #define iscsi_conn_attr(field, param) \ |
1970 | iscsi_conn_attr_show(param) \ | |
1971 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 1972 | NULL); |
0896b752 | 1973 | |
a54a52ca MC |
1974 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
1975 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
1976 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
1977 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
1978 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
1979 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
1980 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
a54a52ca MC |
1981 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); |
1982 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
f6d5180c MC |
1983 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
1984 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 | 1985 | |
289324b0 MC |
1986 | #define iscsi_conn_ep_attr_show(param) \ |
1987 | static ssize_t show_conn_ep_param_##param(struct device *dev, \ | |
1988 | struct device_attribute *attr,\ | |
1989 | char *buf) \ | |
1990 | { \ | |
1991 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ | |
1992 | struct iscsi_transport *t = conn->transport; \ | |
1993 | struct iscsi_endpoint *ep; \ | |
1994 | ssize_t rc; \ | |
1995 | \ | |
1996 | /* \ | |
1997 | * Need to make sure ep_disconnect does not free the LLD's \ | |
1998 | * interconnect resources while we are trying to read them. \ | |
1999 | */ \ | |
2000 | mutex_lock(&conn->ep_mutex); \ | |
2001 | ep = conn->ep; \ | |
2002 | if (!ep && t->ep_connect) { \ | |
2003 | mutex_unlock(&conn->ep_mutex); \ | |
2004 | return -ENOTCONN; \ | |
2005 | } \ | |
2006 | \ | |
2007 | if (ep) \ | |
2008 | rc = t->get_ep_param(ep, param, buf); \ | |
2009 | else \ | |
2010 | rc = t->get_conn_param(conn, param, buf); \ | |
2011 | mutex_unlock(&conn->ep_mutex); \ | |
2012 | return rc; \ | |
2013 | } | |
2014 | ||
2015 | #define iscsi_conn_ep_attr(field, param) \ | |
2016 | iscsi_conn_ep_attr_show(param) \ | |
2017 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ | |
2018 | show_conn_ep_param_##param, NULL); | |
2019 | ||
2020 | iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
2021 | iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); | |
2022 | ||
3128c6c7 MC |
2023 | static struct attribute *iscsi_conn_attrs[] = { |
2024 | &dev_attr_conn_max_recv_dlength.attr, | |
2025 | &dev_attr_conn_max_xmit_dlength.attr, | |
2026 | &dev_attr_conn_header_digest.attr, | |
2027 | &dev_attr_conn_data_digest.attr, | |
2028 | &dev_attr_conn_ifmarker.attr, | |
2029 | &dev_attr_conn_ofmarker.attr, | |
2030 | &dev_attr_conn_address.attr, | |
2031 | &dev_attr_conn_port.attr, | |
2032 | &dev_attr_conn_exp_statsn.attr, | |
2033 | &dev_attr_conn_persistent_address.attr, | |
2034 | &dev_attr_conn_persistent_port.attr, | |
2035 | &dev_attr_conn_ping_tmo.attr, | |
2036 | &dev_attr_conn_recv_tmo.attr, | |
2037 | NULL, | |
2038 | }; | |
2039 | ||
2040 | static mode_t iscsi_conn_attr_is_visible(struct kobject *kobj, | |
2041 | struct attribute *attr, int i) | |
2042 | { | |
2043 | struct device *cdev = container_of(kobj, struct device, kobj); | |
2044 | struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); | |
2045 | struct iscsi_transport *t = conn->transport; | |
2046 | int param; | |
2047 | ||
2048 | if (attr == &dev_attr_conn_max_recv_dlength.attr) | |
2049 | param = ISCSI_PARAM_MAX_RECV_DLENGTH; | |
2050 | else if (attr == &dev_attr_conn_max_xmit_dlength.attr) | |
2051 | param = ISCSI_PARAM_MAX_XMIT_DLENGTH; | |
2052 | else if (attr == &dev_attr_conn_header_digest.attr) | |
2053 | param = ISCSI_PARAM_HDRDGST_EN; | |
2054 | else if (attr == &dev_attr_conn_data_digest.attr) | |
2055 | param = ISCSI_PARAM_DATADGST_EN; | |
2056 | else if (attr == &dev_attr_conn_ifmarker.attr) | |
2057 | param = ISCSI_PARAM_IFMARKER_EN; | |
2058 | else if (attr == &dev_attr_conn_ofmarker.attr) | |
2059 | param = ISCSI_PARAM_OFMARKER_EN; | |
2060 | else if (attr == &dev_attr_conn_address.attr) | |
2061 | param = ISCSI_PARAM_CONN_ADDRESS; | |
2062 | else if (attr == &dev_attr_conn_port.attr) | |
2063 | param = ISCSI_PARAM_CONN_PORT; | |
2064 | else if (attr == &dev_attr_conn_exp_statsn.attr) | |
2065 | param = ISCSI_PARAM_EXP_STATSN; | |
2066 | else if (attr == &dev_attr_conn_persistent_address.attr) | |
2067 | param = ISCSI_PARAM_PERSISTENT_ADDRESS; | |
2068 | else if (attr == &dev_attr_conn_persistent_port.attr) | |
2069 | param = ISCSI_PARAM_PERSISTENT_PORT; | |
2070 | else if (attr == &dev_attr_conn_ping_tmo.attr) | |
2071 | param = ISCSI_PARAM_PING_TMO; | |
2072 | else if (attr == &dev_attr_conn_recv_tmo.attr) | |
2073 | param = ISCSI_PARAM_RECV_TMO; | |
2074 | else { | |
2075 | WARN_ONCE(1, "Invalid conn attr"); | |
2076 | return 0; | |
2077 | } | |
2078 | ||
2079 | return t->attr_is_visible(ISCSI_PARAM, param); | |
2080 | } | |
2081 | ||
2082 | static struct attribute_group iscsi_conn_group = { | |
2083 | .attrs = iscsi_conn_attrs, | |
2084 | .is_visible = iscsi_conn_attr_is_visible, | |
2085 | }; | |
2086 | ||
1da177e4 | 2087 | /* |
0896b752 | 2088 | * iSCSI session attrs |
1da177e4 | 2089 | */ |
b2c64167 | 2090 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 2091 | static ssize_t \ |
ee959b00 TJ |
2092 | show_session_param_##param(struct device *dev, \ |
2093 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 2094 | { \ |
ee959b00 TJ |
2095 | struct iscsi_cls_session *session = \ |
2096 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 | 2097 | struct iscsi_transport *t = session->transport; \ |
b2c64167 MC |
2098 | \ |
2099 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
2100 | return -EACCES; \ | |
a54a52ca | 2101 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
2102 | } |
2103 | ||
b2c64167 MC |
2104 | #define iscsi_session_attr(field, param, perm) \ |
2105 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 2106 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 | 2107 | NULL); |
b2c64167 MC |
2108 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
2109 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
2110 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
2111 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
2112 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
2113 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
2114 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
2115 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
2116 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
2117 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
2118 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
2119 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
2120 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
2121 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
2122 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
2123 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
2124 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
3fe5ae8b | 2125 | iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); |
88dfd340 | 2126 | iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); |
3b2bef1f VC |
2127 | iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); |
2128 | iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); | |
1da177e4 | 2129 | |
6eabafbe | 2130 | static ssize_t |
ee959b00 TJ |
2131 | show_priv_session_state(struct device *dev, struct device_attribute *attr, |
2132 | char *buf) | |
6eabafbe | 2133 | { |
ee959b00 | 2134 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); |
6eabafbe MC |
2135 | return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); |
2136 | } | |
2137 | static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, | |
2138 | NULL); | |
2139 | ||
fd7255f5 MC |
2140 | #define iscsi_priv_session_attr_show(field, format) \ |
2141 | static ssize_t \ | |
ee959b00 TJ |
2142 | show_priv_session_##field(struct device *dev, \ |
2143 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 2144 | { \ |
ee959b00 TJ |
2145 | struct iscsi_cls_session *session = \ |
2146 | iscsi_dev_to_session(dev->parent); \ | |
fe4f0bde VC |
2147 | if (session->field == -1) \ |
2148 | return sprintf(buf, "off\n"); \ | |
fd7255f5 MC |
2149 | return sprintf(buf, format"\n", session->field); \ |
2150 | } | |
2151 | ||
fe4f0bde VC |
2152 | #define iscsi_priv_session_attr_store(field) \ |
2153 | static ssize_t \ | |
2154 | store_priv_session_##field(struct device *dev, \ | |
2155 | struct device_attribute *attr, \ | |
2156 | const char *buf, size_t count) \ | |
2157 | { \ | |
2158 | int val; \ | |
2159 | char *cp; \ | |
2160 | struct iscsi_cls_session *session = \ | |
2161 | iscsi_dev_to_session(dev->parent); \ | |
2162 | if ((session->state == ISCSI_SESSION_FREE) || \ | |
2163 | (session->state == ISCSI_SESSION_FAILED)) \ | |
2164 | return -EBUSY; \ | |
2165 | if (strncmp(buf, "off", 3) == 0) \ | |
2166 | session->field = -1; \ | |
2167 | else { \ | |
2168 | val = simple_strtoul(buf, &cp, 0); \ | |
2169 | if (*cp != '\0' && *cp != '\n') \ | |
2170 | return -EINVAL; \ | |
2171 | session->field = val; \ | |
2172 | } \ | |
2173 | return count; \ | |
2174 | } | |
2175 | ||
2176 | #define iscsi_priv_session_rw_attr(field, format) \ | |
fd7255f5 | 2177 | iscsi_priv_session_attr_show(field, format) \ |
fe4f0bde | 2178 | iscsi_priv_session_attr_store(field) \ |
523f3c80 | 2179 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ |
fe4f0bde VC |
2180 | show_priv_session_##field, \ |
2181 | store_priv_session_##field) | |
2182 | iscsi_priv_session_rw_attr(recovery_tmo, "%d"); | |
fd7255f5 | 2183 | |
1d063c17 MC |
2184 | static struct attribute *iscsi_session_attrs[] = { |
2185 | &dev_attr_sess_initial_r2t.attr, | |
2186 | &dev_attr_sess_max_outstanding_r2t.attr, | |
2187 | &dev_attr_sess_immediate_data.attr, | |
2188 | &dev_attr_sess_first_burst_len.attr, | |
2189 | &dev_attr_sess_max_burst_len.attr, | |
2190 | &dev_attr_sess_data_pdu_in_order.attr, | |
2191 | &dev_attr_sess_data_seq_in_order.attr, | |
2192 | &dev_attr_sess_erl.attr, | |
2193 | &dev_attr_sess_targetname.attr, | |
2194 | &dev_attr_sess_tpgt.attr, | |
2195 | &dev_attr_sess_password.attr, | |
2196 | &dev_attr_sess_password_in.attr, | |
2197 | &dev_attr_sess_username.attr, | |
2198 | &dev_attr_sess_username_in.attr, | |
2199 | &dev_attr_sess_fast_abort.attr, | |
2200 | &dev_attr_sess_abort_tmo.attr, | |
2201 | &dev_attr_sess_lu_reset_tmo.attr, | |
2202 | &dev_attr_sess_tgt_reset_tmo.attr, | |
2203 | &dev_attr_sess_ifacename.attr, | |
2204 | &dev_attr_sess_initiatorname.attr, | |
2205 | &dev_attr_sess_targetalias.attr, | |
2206 | &dev_attr_priv_sess_recovery_tmo.attr, | |
2207 | &dev_attr_priv_sess_state.attr, | |
2208 | NULL, | |
2209 | }; | |
2210 | ||
2211 | static mode_t iscsi_session_attr_is_visible(struct kobject *kobj, | |
2212 | struct attribute *attr, int i) | |
2213 | { | |
2214 | struct device *cdev = container_of(kobj, struct device, kobj); | |
2215 | struct iscsi_cls_session *session = transport_class_to_session(cdev); | |
2216 | struct iscsi_transport *t = session->transport; | |
2217 | int param; | |
2218 | ||
2219 | if (attr == &dev_attr_sess_initial_r2t.attr) | |
2220 | param = ISCSI_PARAM_INITIAL_R2T_EN; | |
2221 | else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) | |
2222 | param = ISCSI_PARAM_MAX_R2T; | |
2223 | else if (attr == &dev_attr_sess_immediate_data.attr) | |
2224 | param = ISCSI_PARAM_IMM_DATA_EN; | |
2225 | else if (attr == &dev_attr_sess_first_burst_len.attr) | |
2226 | param = ISCSI_PARAM_FIRST_BURST; | |
2227 | else if (attr == &dev_attr_sess_max_burst_len.attr) | |
2228 | param = ISCSI_PARAM_MAX_BURST; | |
2229 | else if (attr == &dev_attr_sess_data_pdu_in_order.attr) | |
2230 | param = ISCSI_PARAM_PDU_INORDER_EN; | |
2231 | else if (attr == &dev_attr_sess_data_seq_in_order.attr) | |
2232 | param = ISCSI_PARAM_DATASEQ_INORDER_EN; | |
2233 | else if (attr == &dev_attr_sess_erl.attr) | |
2234 | param = ISCSI_PARAM_ERL; | |
2235 | else if (attr == &dev_attr_sess_targetname.attr) | |
2236 | param = ISCSI_PARAM_TARGET_NAME; | |
2237 | else if (attr == &dev_attr_sess_tpgt.attr) | |
2238 | param = ISCSI_PARAM_TPGT; | |
2239 | else if (attr == &dev_attr_sess_password.attr) | |
2240 | param = ISCSI_PARAM_USERNAME; | |
2241 | else if (attr == &dev_attr_sess_password_in.attr) | |
2242 | param = ISCSI_PARAM_USERNAME_IN; | |
2243 | else if (attr == &dev_attr_sess_username.attr) | |
2244 | param = ISCSI_PARAM_PASSWORD; | |
2245 | else if (attr == &dev_attr_sess_username_in.attr) | |
2246 | param = ISCSI_PARAM_PASSWORD_IN; | |
2247 | else if (attr == &dev_attr_sess_fast_abort.attr) | |
2248 | param = ISCSI_PARAM_FAST_ABORT; | |
2249 | else if (attr == &dev_attr_sess_abort_tmo.attr) | |
2250 | param = ISCSI_PARAM_ABORT_TMO; | |
2251 | else if (attr == &dev_attr_sess_lu_reset_tmo.attr) | |
2252 | param = ISCSI_PARAM_LU_RESET_TMO; | |
2253 | else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) | |
2254 | param = ISCSI_PARAM_TGT_RESET_TMO; | |
2255 | else if (attr == &dev_attr_sess_ifacename.attr) | |
2256 | param = ISCSI_PARAM_IFACE_NAME; | |
2257 | else if (attr == &dev_attr_sess_initiatorname.attr) | |
2258 | param = ISCSI_PARAM_INITIATOR_NAME; | |
2259 | else if (attr == &dev_attr_sess_targetalias.attr) | |
2260 | param = ISCSI_PARAM_TARGET_ALIAS; | |
2261 | else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) | |
2262 | return S_IRUGO | S_IWUSR; | |
2263 | else if (attr == &dev_attr_priv_sess_state.attr) | |
2264 | return S_IRUGO; | |
2265 | else { | |
2266 | WARN_ONCE(1, "Invalid session attr"); | |
2267 | return 0; | |
2268 | } | |
2269 | ||
2270 | return t->attr_is_visible(ISCSI_PARAM, param); | |
2271 | } | |
2272 | ||
2273 | static struct attribute_group iscsi_session_group = { | |
2274 | .attrs = iscsi_session_attrs, | |
2275 | .is_visible = iscsi_session_attr_is_visible, | |
2276 | }; | |
2277 | ||
1819dc81 MC |
2278 | /* |
2279 | * iSCSI host attrs | |
2280 | */ | |
2281 | #define iscsi_host_attr_show(param) \ | |
2282 | static ssize_t \ | |
ee959b00 TJ |
2283 | show_host_param_##param(struct device *dev, \ |
2284 | struct device_attribute *attr, char *buf) \ | |
1819dc81 | 2285 | { \ |
ee959b00 | 2286 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1819dc81 MC |
2287 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ |
2288 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
2289 | } | |
2290 | ||
2291 | #define iscsi_host_attr(field, param) \ | |
2292 | iscsi_host_attr_show(param) \ | |
2293 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
2294 | NULL); | |
2295 | ||
d8196ed2 | 2296 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 2297 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 2298 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 2299 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 2300 | |
f27fb2ef MC |
2301 | static struct attribute *iscsi_host_attrs[] = { |
2302 | &dev_attr_host_netdev.attr, | |
2303 | &dev_attr_host_hwaddress.attr, | |
2304 | &dev_attr_host_ipaddress.attr, | |
2305 | &dev_attr_host_initiatorname.attr, | |
2306 | NULL, | |
2307 | }; | |
2308 | ||
2309 | static mode_t iscsi_host_attr_is_visible(struct kobject *kobj, | |
2310 | struct attribute *attr, int i) | |
2311 | { | |
2312 | struct device *cdev = container_of(kobj, struct device, kobj); | |
2313 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
2314 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); | |
2315 | int param; | |
2316 | ||
2317 | if (attr == &dev_attr_host_netdev.attr) | |
2318 | param = ISCSI_HOST_PARAM_NETDEV_NAME; | |
2319 | else if (attr == &dev_attr_host_hwaddress.attr) | |
2320 | param = ISCSI_HOST_PARAM_HWADDRESS; | |
2321 | else if (attr == &dev_attr_host_ipaddress.attr) | |
2322 | param = ISCSI_HOST_PARAM_IPADDRESS; | |
2323 | else if (attr == &dev_attr_host_initiatorname.attr) | |
2324 | param = ISCSI_HOST_PARAM_INITIATOR_NAME; | |
2325 | else { | |
2326 | WARN_ONCE(1, "Invalid host attr"); | |
2327 | return 0; | |
2328 | } | |
2329 | ||
2330 | return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); | |
2331 | } | |
2332 | ||
2333 | static struct attribute_group iscsi_host_group = { | |
2334 | .attrs = iscsi_host_attrs, | |
2335 | .is_visible = iscsi_host_attr_is_visible, | |
2336 | }; | |
1819dc81 | 2337 | |
0896b752 AA |
2338 | static int iscsi_session_match(struct attribute_container *cont, |
2339 | struct device *dev) | |
1da177e4 | 2340 | { |
7b8631b5 | 2341 | struct iscsi_cls_session *session; |
1da177e4 | 2342 | struct Scsi_Host *shost; |
0896b752 AA |
2343 | struct iscsi_internal *priv; |
2344 | ||
2345 | if (!iscsi_is_session_dev(dev)) | |
2346 | return 0; | |
1da177e4 | 2347 | |
7b8631b5 MC |
2348 | session = iscsi_dev_to_session(dev); |
2349 | shost = iscsi_session_to_shost(session); | |
0896b752 | 2350 | if (!shost->transportt) |
1da177e4 LT |
2351 | return 0; |
2352 | ||
0896b752 AA |
2353 | priv = to_iscsi_internal(shost->transportt); |
2354 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
2355 | return 0; |
2356 | ||
0896b752 | 2357 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
2358 | } |
2359 | ||
0896b752 AA |
2360 | static int iscsi_conn_match(struct attribute_container *cont, |
2361 | struct device *dev) | |
2362 | { | |
7b8631b5 MC |
2363 | struct iscsi_cls_session *session; |
2364 | struct iscsi_cls_conn *conn; | |
1da177e4 | 2365 | struct Scsi_Host *shost; |
0896b752 | 2366 | struct iscsi_internal *priv; |
1da177e4 | 2367 | |
0896b752 | 2368 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
2369 | return 0; |
2370 | ||
7b8631b5 MC |
2371 | conn = iscsi_dev_to_conn(dev); |
2372 | session = iscsi_dev_to_session(conn->dev.parent); | |
2373 | shost = iscsi_session_to_shost(session); | |
2374 | ||
0896b752 | 2375 | if (!shost->transportt) |
1da177e4 LT |
2376 | return 0; |
2377 | ||
0896b752 AA |
2378 | priv = to_iscsi_internal(shost->transportt); |
2379 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
2380 | return 0; | |
1da177e4 | 2381 | |
0896b752 AA |
2382 | return &priv->conn_cont.ac == cont; |
2383 | } | |
2384 | ||
30a6c652 MC |
2385 | static int iscsi_host_match(struct attribute_container *cont, |
2386 | struct device *dev) | |
2387 | { | |
2388 | struct Scsi_Host *shost; | |
2389 | struct iscsi_internal *priv; | |
2390 | ||
2391 | if (!scsi_is_host_device(dev)) | |
2392 | return 0; | |
2393 | ||
2394 | shost = dev_to_shost(dev); | |
2395 | if (!shost->transportt || | |
2396 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
2397 | return 0; | |
2398 | ||
2399 | priv = to_iscsi_internal(shost->transportt); | |
2400 | return &priv->t.host_attrs.ac == cont; | |
2401 | } | |
2402 | ||
7b8631b5 MC |
2403 | struct scsi_transport_template * |
2404 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
2405 | { |
2406 | struct iscsi_internal *priv; | |
2407 | unsigned long flags; | |
f27fb2ef | 2408 | int err; |
0896b752 AA |
2409 | |
2410 | BUG_ON(!tt); | |
2411 | ||
2412 | priv = iscsi_if_transport_lookup(tt); | |
2413 | if (priv) | |
7b8631b5 | 2414 | return NULL; |
0896b752 | 2415 | |
24669f75 | 2416 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 2417 | if (!priv) |
7b8631b5 | 2418 | return NULL; |
0896b752 | 2419 | INIT_LIST_HEAD(&priv->list); |
0896b752 | 2420 | priv->iscsi_transport = tt; |
30a6c652 | 2421 | priv->t.user_scan = iscsi_user_scan; |
06d25af4 | 2422 | priv->t.create_work_queue = 1; |
0896b752 | 2423 | |
ee959b00 | 2424 | priv->dev.class = &iscsi_transport_class; |
71610f55 | 2425 | dev_set_name(&priv->dev, "%s", tt->name); |
ee959b00 | 2426 | err = device_register(&priv->dev); |
0896b752 AA |
2427 | if (err) |
2428 | goto free_priv; | |
2429 | ||
ee959b00 | 2430 | err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); |
0896b752 | 2431 | if (err) |
ee959b00 | 2432 | goto unregister_dev; |
0896b752 | 2433 | |
30a6c652 | 2434 | /* host parameters */ |
30a6c652 MC |
2435 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; |
2436 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
f27fb2ef | 2437 | priv->t.host_attrs.ac.grp = &iscsi_host_group; |
32c6e1b9 | 2438 | priv->t.host_size = sizeof(struct iscsi_cls_host); |
30a6c652 MC |
2439 | transport_container_register(&priv->t.host_attrs); |
2440 | ||
0896b752 | 2441 | /* connection parameters */ |
0896b752 AA |
2442 | priv->conn_cont.ac.class = &iscsi_connection_class.class; |
2443 | priv->conn_cont.ac.match = iscsi_conn_match; | |
3128c6c7 | 2444 | priv->conn_cont.ac.grp = &iscsi_conn_group; |
0896b752 | 2445 | transport_container_register(&priv->conn_cont); |
1da177e4 | 2446 | |
0896b752 | 2447 | /* session parameters */ |
0896b752 AA |
2448 | priv->session_cont.ac.class = &iscsi_session_class.class; |
2449 | priv->session_cont.ac.match = iscsi_session_match; | |
1d063c17 | 2450 | priv->session_cont.ac.grp = &iscsi_session_group; |
0896b752 AA |
2451 | transport_container_register(&priv->session_cont); |
2452 | ||
0896b752 AA |
2453 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
2454 | list_add(&priv->list, &iscsi_transports); | |
2455 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
2456 | ||
2457 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 2458 | return &priv->t; |
1da177e4 | 2459 | |
ee959b00 TJ |
2460 | unregister_dev: |
2461 | device_unregister(&priv->dev); | |
d82ff9be | 2462 | return NULL; |
0896b752 AA |
2463 | free_priv: |
2464 | kfree(priv); | |
7b8631b5 | 2465 | return NULL; |
1da177e4 | 2466 | } |
0896b752 AA |
2467 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
2468 | ||
2469 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
2470 | { | |
2471 | struct iscsi_internal *priv; | |
2472 | unsigned long flags; | |
2473 | ||
2474 | BUG_ON(!tt); | |
2475 | ||
0b950672 | 2476 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
2477 | |
2478 | priv = iscsi_if_transport_lookup(tt); | |
2479 | BUG_ON (!priv); | |
2480 | ||
0896b752 AA |
2481 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
2482 | list_del(&priv->list); | |
2483 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
2484 | ||
2485 | transport_container_unregister(&priv->conn_cont); | |
2486 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 2487 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 | 2488 | |
ee959b00 TJ |
2489 | sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); |
2490 | device_unregister(&priv->dev); | |
0b950672 | 2491 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 2492 | |
0896b752 AA |
2493 | return 0; |
2494 | } | |
2495 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 2496 | |
1da177e4 LT |
2497 | static __init int iscsi_transport_init(void) |
2498 | { | |
0896b752 | 2499 | int err; |
1da177e4 | 2500 | |
09492605 | 2501 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
2502 | ISCSI_TRANSPORT_VERSION); |
2503 | ||
41be1444 MC |
2504 | atomic_set(&iscsi_session_nr, 0); |
2505 | ||
0896b752 | 2506 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
2507 | if (err) |
2508 | return err; | |
0896b752 | 2509 | |
d82ff9be | 2510 | err = class_register(&iscsi_endpoint_class); |
0896b752 AA |
2511 | if (err) |
2512 | goto unregister_transport_class; | |
2513 | ||
8d07913d | 2514 | err = class_register(&iscsi_iface_class); |
d82ff9be MC |
2515 | if (err) |
2516 | goto unregister_endpoint_class; | |
2517 | ||
8d07913d MC |
2518 | err = transport_class_register(&iscsi_host_class); |
2519 | if (err) | |
2520 | goto unregister_iface_class; | |
2521 | ||
30a6c652 MC |
2522 | err = transport_class_register(&iscsi_connection_class); |
2523 | if (err) | |
2524 | goto unregister_host_class; | |
2525 | ||
0896b752 AA |
2526 | err = transport_class_register(&iscsi_session_class); |
2527 | if (err) | |
2528 | goto unregister_conn_class; | |
2529 | ||
d82ff9be MC |
2530 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, |
2531 | NULL, THIS_MODULE); | |
0896b752 AA |
2532 | if (!nls) { |
2533 | err = -ENOBUFS; | |
43a145a3 | 2534 | goto unregister_session_class; |
0896b752 AA |
2535 | } |
2536 | ||
d8bf541e MC |
2537 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
2538 | if (!iscsi_eh_timer_workq) | |
2539 | goto release_nls; | |
2540 | ||
43a145a3 | 2541 | return 0; |
0896b752 | 2542 | |
d8bf541e | 2543 | release_nls: |
b7c6ba6e | 2544 | netlink_kernel_release(nls); |
0896b752 AA |
2545 | unregister_session_class: |
2546 | transport_class_unregister(&iscsi_session_class); | |
2547 | unregister_conn_class: | |
2548 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
2549 | unregister_host_class: |
2550 | transport_class_unregister(&iscsi_host_class); | |
8d07913d MC |
2551 | unregister_iface_class: |
2552 | class_unregister(&iscsi_iface_class); | |
d82ff9be MC |
2553 | unregister_endpoint_class: |
2554 | class_unregister(&iscsi_endpoint_class); | |
0896b752 AA |
2555 | unregister_transport_class: |
2556 | class_unregister(&iscsi_transport_class); | |
2557 | return err; | |
1da177e4 LT |
2558 | } |
2559 | ||
2560 | static void __exit iscsi_transport_exit(void) | |
2561 | { | |
d8bf541e | 2562 | destroy_workqueue(iscsi_eh_timer_workq); |
b7c6ba6e | 2563 | netlink_kernel_release(nls); |
0896b752 AA |
2564 | transport_class_unregister(&iscsi_connection_class); |
2565 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 2566 | transport_class_unregister(&iscsi_host_class); |
d82ff9be | 2567 | class_unregister(&iscsi_endpoint_class); |
8d07913d | 2568 | class_unregister(&iscsi_iface_class); |
0896b752 | 2569 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
2570 | } |
2571 | ||
2572 | module_init(iscsi_transport_init); | |
2573 | module_exit(iscsi_transport_exit); | |
2574 | ||
0896b752 AA |
2575 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
2576 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
2577 | "Alex Aizman <itn780@yahoo.com>"); | |
2578 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 2579 | MODULE_LICENSE("GPL"); |
f4246b33 | 2580 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |
058548ae | 2581 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); |