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Commit | Line | Data |
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0896b752 | 1 | /* |
1da177e4 LT |
2 | * iSCSI transport class definitions |
3 | * | |
4 | * Copyright (C) IBM Corporation, 2004 | |
0896b752 AA |
5 | * Copyright (C) Mike Christie, 2004 - 2005 |
6 | * Copyright (C) Dmitry Yusupov, 2004 - 2005 | |
7 | * Copyright (C) Alex Aizman, 2004 - 2005 | |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | #include <linux/module.h> | |
0b950672 | 24 | #include <linux/mutex.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
90eeb01a | 26 | #include <linux/bsg-lib.h> |
0896b752 | 27 | #include <net/tcp.h> |
1da177e4 LT |
28 | #include <scsi/scsi.h> |
29 | #include <scsi/scsi_host.h> | |
30 | #include <scsi/scsi_device.h> | |
31 | #include <scsi/scsi_transport.h> | |
32 | #include <scsi/scsi_transport_iscsi.h> | |
0896b752 | 33 | #include <scsi/iscsi_if.h> |
c01be6dc | 34 | #include <scsi/scsi_cmnd.h> |
90eeb01a | 35 | #include <scsi/scsi_bsg_iscsi.h> |
1da177e4 | 36 | |
4c2133c8 | 37 | #define ISCSI_TRANSPORT_VERSION "2.0-870" |
1da177e4 | 38 | |
632248aa MC |
39 | static int dbg_session; |
40 | module_param_named(debug_session, dbg_session, int, | |
41 | S_IRUGO | S_IWUSR); | |
42 | MODULE_PARM_DESC(debug_session, | |
43 | "Turn on debugging for sessions in scsi_transport_iscsi " | |
44 | "module. Set to 1 to turn on, and zero to turn off. Default " | |
45 | "is off."); | |
46 | ||
47 | static int dbg_conn; | |
48 | module_param_named(debug_conn, dbg_conn, int, | |
49 | S_IRUGO | S_IWUSR); | |
50 | MODULE_PARM_DESC(debug_conn, | |
51 | "Turn on debugging for connections in scsi_transport_iscsi " | |
52 | "module. Set to 1 to turn on, and zero to turn off. Default " | |
53 | "is off."); | |
54 | ||
55 | #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \ | |
56 | do { \ | |
57 | if (dbg_session) \ | |
58 | iscsi_cls_session_printk(KERN_INFO, _session, \ | |
59 | "%s: " dbg_fmt, \ | |
60 | __func__, ##arg); \ | |
61 | } while (0); | |
62 | ||
63 | #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \ | |
64 | do { \ | |
65 | if (dbg_conn) \ | |
66 | iscsi_cls_conn_printk(KERN_INFO, _conn, \ | |
67 | "%s: " dbg_fmt, \ | |
68 | __func__, ##arg); \ | |
69 | } while (0); | |
70 | ||
1da177e4 LT |
71 | struct iscsi_internal { |
72 | struct scsi_transport_template t; | |
0896b752 AA |
73 | struct iscsi_transport *iscsi_transport; |
74 | struct list_head list; | |
ee959b00 | 75 | struct device dev; |
30a6c652 | 76 | |
0896b752 | 77 | struct transport_container conn_cont; |
0896b752 | 78 | struct transport_container session_cont; |
1da177e4 LT |
79 | }; |
80 | ||
41be1444 | 81 | static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ |
d8bf541e | 82 | static struct workqueue_struct *iscsi_eh_timer_workq; |
b5c7a12d | 83 | |
0896b752 AA |
84 | /* |
85 | * list of registered transports and lock that must | |
86 | * be held while accessing list. The iscsi_transport_lock must | |
0b950672 | 87 | * be acquired after the rx_queue_mutex. |
0896b752 AA |
88 | */ |
89 | static LIST_HEAD(iscsi_transports); | |
90 | static DEFINE_SPINLOCK(iscsi_transport_lock); | |
91 | ||
92 | #define to_iscsi_internal(tmpl) \ | |
93 | container_of(tmpl, struct iscsi_internal, t) | |
94 | ||
ee959b00 TJ |
95 | #define dev_to_iscsi_internal(_dev) \ |
96 | container_of(_dev, struct iscsi_internal, dev) | |
0896b752 | 97 | |
ee959b00 | 98 | static void iscsi_transport_release(struct device *dev) |
0896b752 | 99 | { |
ee959b00 | 100 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
0896b752 AA |
101 | kfree(priv); |
102 | } | |
1da177e4 | 103 | |
0896b752 AA |
104 | /* |
105 | * iscsi_transport_class represents the iscsi_transports that are | |
106 | * registered. | |
107 | */ | |
108 | static struct class iscsi_transport_class = { | |
109 | .name = "iscsi_transport", | |
ee959b00 | 110 | .dev_release = iscsi_transport_release, |
0896b752 AA |
111 | }; |
112 | ||
113 | static ssize_t | |
ee959b00 TJ |
114 | show_transport_handle(struct device *dev, struct device_attribute *attr, |
115 | char *buf) | |
0896b752 | 116 | { |
ee959b00 | 117 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
762e2bfa | 118 | return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); |
0896b752 | 119 | } |
ee959b00 | 120 | static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); |
0896b752 AA |
121 | |
122 | #define show_transport_attr(name, format) \ | |
123 | static ssize_t \ | |
ee959b00 TJ |
124 | show_transport_##name(struct device *dev, \ |
125 | struct device_attribute *attr,char *buf) \ | |
0896b752 | 126 | { \ |
ee959b00 | 127 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ |
0896b752 AA |
128 | return sprintf(buf, format"\n", priv->iscsi_transport->name); \ |
129 | } \ | |
ee959b00 | 130 | static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); |
0896b752 AA |
131 | |
132 | show_transport_attr(caps, "0x%x"); | |
0896b752 AA |
133 | |
134 | static struct attribute *iscsi_transport_attrs[] = { | |
ee959b00 TJ |
135 | &dev_attr_handle.attr, |
136 | &dev_attr_caps.attr, | |
0896b752 AA |
137 | NULL, |
138 | }; | |
139 | ||
140 | static struct attribute_group iscsi_transport_group = { | |
141 | .attrs = iscsi_transport_attrs, | |
142 | }; | |
143 | ||
d82ff9be MC |
144 | /* |
145 | * iSCSI endpoint attrs | |
146 | */ | |
147 | #define iscsi_dev_to_endpoint(_dev) \ | |
148 | container_of(_dev, struct iscsi_endpoint, dev) | |
149 | ||
150 | #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ | |
151 | struct device_attribute dev_attr_##_prefix##_##_name = \ | |
152 | __ATTR(_name,_mode,_show,_store) | |
153 | ||
154 | static void iscsi_endpoint_release(struct device *dev) | |
155 | { | |
156 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
157 | kfree(ep); | |
158 | } | |
159 | ||
160 | static struct class iscsi_endpoint_class = { | |
161 | .name = "iscsi_endpoint", | |
162 | .dev_release = iscsi_endpoint_release, | |
163 | }; | |
164 | ||
165 | static ssize_t | |
166 | show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) | |
167 | { | |
168 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
21536062 | 169 | return sprintf(buf, "%llu\n", (unsigned long long) ep->id); |
d82ff9be MC |
170 | } |
171 | static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); | |
172 | ||
173 | static struct attribute *iscsi_endpoint_attrs[] = { | |
174 | &dev_attr_ep_handle.attr, | |
175 | NULL, | |
176 | }; | |
177 | ||
178 | static struct attribute_group iscsi_endpoint_group = { | |
179 | .attrs = iscsi_endpoint_attrs, | |
180 | }; | |
181 | ||
182 | #define ISCSI_MAX_EPID -1 | |
183 | ||
184 | static int iscsi_match_epid(struct device *dev, void *data) | |
185 | { | |
186 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
21536062 | 187 | uint64_t *epid = (uint64_t *) data; |
d82ff9be MC |
188 | |
189 | return *epid == ep->id; | |
190 | } | |
191 | ||
192 | struct iscsi_endpoint * | |
193 | iscsi_create_endpoint(int dd_size) | |
194 | { | |
195 | struct device *dev; | |
196 | struct iscsi_endpoint *ep; | |
21536062 | 197 | uint64_t id; |
d82ff9be MC |
198 | int err; |
199 | ||
200 | for (id = 1; id < ISCSI_MAX_EPID; id++) { | |
695794ae | 201 | dev = class_find_device(&iscsi_endpoint_class, NULL, &id, |
d82ff9be MC |
202 | iscsi_match_epid); |
203 | if (!dev) | |
204 | break; | |
205 | } | |
206 | if (id == ISCSI_MAX_EPID) { | |
207 | printk(KERN_ERR "Too many connections. Max supported %u\n", | |
208 | ISCSI_MAX_EPID - 1); | |
209 | return NULL; | |
210 | } | |
211 | ||
212 | ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); | |
213 | if (!ep) | |
214 | return NULL; | |
215 | ||
216 | ep->id = id; | |
217 | ep->dev.class = &iscsi_endpoint_class; | |
71610f55 | 218 | dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); |
d82ff9be MC |
219 | err = device_register(&ep->dev); |
220 | if (err) | |
221 | goto free_ep; | |
222 | ||
223 | err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); | |
224 | if (err) | |
225 | goto unregister_dev; | |
226 | ||
227 | if (dd_size) | |
228 | ep->dd_data = &ep[1]; | |
229 | return ep; | |
230 | ||
231 | unregister_dev: | |
232 | device_unregister(&ep->dev); | |
233 | return NULL; | |
234 | ||
235 | free_ep: | |
236 | kfree(ep); | |
237 | return NULL; | |
238 | } | |
239 | EXPORT_SYMBOL_GPL(iscsi_create_endpoint); | |
240 | ||
241 | void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) | |
242 | { | |
243 | sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); | |
244 | device_unregister(&ep->dev); | |
245 | } | |
246 | EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); | |
247 | ||
248 | struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) | |
249 | { | |
f80f868e | 250 | struct iscsi_endpoint *ep; |
d82ff9be MC |
251 | struct device *dev; |
252 | ||
695794ae | 253 | dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, |
d82ff9be MC |
254 | iscsi_match_epid); |
255 | if (!dev) | |
256 | return NULL; | |
257 | ||
f80f868e MC |
258 | ep = iscsi_dev_to_endpoint(dev); |
259 | /* | |
260 | * we can drop this now because the interface will prevent | |
261 | * removals and lookups from racing. | |
262 | */ | |
263 | put_device(dev); | |
264 | return ep; | |
d82ff9be MC |
265 | } |
266 | EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); | |
267 | ||
8d07913d MC |
268 | /* |
269 | * Interface to display network param to sysfs | |
270 | */ | |
271 | ||
272 | static void iscsi_iface_release(struct device *dev) | |
273 | { | |
274 | struct iscsi_iface *iface = iscsi_dev_to_iface(dev); | |
275 | struct device *parent = iface->dev.parent; | |
276 | ||
277 | kfree(iface); | |
278 | put_device(parent); | |
279 | } | |
280 | ||
281 | ||
282 | static struct class iscsi_iface_class = { | |
283 | .name = "iscsi_iface", | |
284 | .dev_release = iscsi_iface_release, | |
285 | }; | |
286 | ||
287 | #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ | |
288 | struct device_attribute dev_attr_##_prefix##_##_name = \ | |
289 | __ATTR(_name, _mode, _show, _store) | |
290 | ||
291 | /* iface attrs show */ | |
292 | #define iscsi_iface_attr_show(type, name, param_type, param) \ | |
293 | static ssize_t \ | |
294 | show_##type##_##name(struct device *dev, struct device_attribute *attr, \ | |
295 | char *buf) \ | |
296 | { \ | |
297 | struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ | |
298 | struct iscsi_transport *t = iface->transport; \ | |
299 | return t->get_iface_param(iface, param_type, param, buf); \ | |
300 | } \ | |
301 | ||
302 | #define iscsi_iface_net_attr(type, name, param) \ | |
303 | iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ | |
304 | static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); | |
305 | ||
306 | /* generic read only ipvi4 attribute */ | |
307 | iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); | |
308 | iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); | |
309 | iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); | |
310 | iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); | |
311 | ||
312 | /* generic read only ipv6 attribute */ | |
313 | iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); | |
314 | iscsi_iface_net_attr(ipv6_iface, link_local_addr, ISCSI_NET_PARAM_IPV6_LINKLOCAL); | |
315 | iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); | |
316 | iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, | |
317 | ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); | |
318 | iscsi_iface_net_attr(ipv6_iface, linklocal_autocfg, | |
319 | ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); | |
320 | ||
321 | /* common read only iface attribute */ | |
322 | iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); | |
323 | iscsi_iface_net_attr(iface, vlan, ISCSI_NET_PARAM_VLAN_ID); | |
4223b9e9 MC |
324 | iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); |
325 | iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); | |
8c7d40fb | 326 | iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); |
fcb5124e | 327 | iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); |
8d07913d MC |
328 | |
329 | static mode_t iscsi_iface_attr_is_visible(struct kobject *kobj, | |
330 | struct attribute *attr, int i) | |
331 | { | |
332 | struct device *dev = container_of(kobj, struct device, kobj); | |
333 | struct iscsi_iface *iface = iscsi_dev_to_iface(dev); | |
334 | struct iscsi_transport *t = iface->transport; | |
b78dbba0 | 335 | int param; |
8d07913d MC |
336 | |
337 | if (attr == &dev_attr_iface_enabled.attr) | |
b78dbba0 | 338 | param = ISCSI_NET_PARAM_IFACE_ENABLE; |
8d07913d | 339 | else if (attr == &dev_attr_iface_vlan.attr) |
b78dbba0 | 340 | param = ISCSI_NET_PARAM_VLAN_ID; |
4223b9e9 MC |
341 | else if (attr == &dev_attr_iface_vlan_priority.attr) |
342 | param = ISCSI_NET_PARAM_VLAN_PRIORITY; | |
343 | else if (attr == &dev_attr_iface_vlan_enabled.attr) | |
344 | param = ISCSI_NET_PARAM_VLAN_ENABLED; | |
8c7d40fb VC |
345 | else if (attr == &dev_attr_iface_mtu.attr) |
346 | param = ISCSI_NET_PARAM_MTU; | |
fcb5124e VC |
347 | else if (attr == &dev_attr_iface_port.attr) |
348 | param = ISCSI_NET_PARAM_PORT; | |
b78dbba0 | 349 | else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { |
8d07913d | 350 | if (attr == &dev_attr_ipv4_iface_ipaddress.attr) |
b78dbba0 | 351 | param = ISCSI_NET_PARAM_IPV4_ADDR; |
8d07913d | 352 | else if (attr == &dev_attr_ipv4_iface_gateway.attr) |
b78dbba0 | 353 | param = ISCSI_NET_PARAM_IPV4_GW; |
8d07913d | 354 | else if (attr == &dev_attr_ipv4_iface_subnet.attr) |
b78dbba0 | 355 | param = ISCSI_NET_PARAM_IPV4_SUBNET; |
8d07913d | 356 | else if (attr == &dev_attr_ipv4_iface_bootproto.attr) |
b78dbba0 MC |
357 | param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; |
358 | else | |
359 | return 0; | |
8d07913d MC |
360 | } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { |
361 | if (attr == &dev_attr_ipv6_iface_ipaddress.attr) | |
b78dbba0 | 362 | param = ISCSI_NET_PARAM_IPV6_ADDR; |
8d07913d | 363 | else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) |
b78dbba0 | 364 | param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; |
8d07913d | 365 | else if (attr == &dev_attr_ipv6_iface_router_addr.attr) |
b78dbba0 | 366 | param = ISCSI_NET_PARAM_IPV6_ROUTER; |
8d07913d | 367 | else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) |
b78dbba0 | 368 | param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; |
8d07913d | 369 | else if (attr == &dev_attr_ipv6_iface_linklocal_autocfg.attr) |
b78dbba0 MC |
370 | param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; |
371 | else | |
372 | return 0; | |
373 | } else { | |
374 | WARN_ONCE(1, "Invalid iface attr"); | |
375 | return 0; | |
8d07913d MC |
376 | } |
377 | ||
b78dbba0 | 378 | return t->attr_is_visible(ISCSI_NET_PARAM, param); |
8d07913d MC |
379 | } |
380 | ||
381 | static struct attribute *iscsi_iface_attrs[] = { | |
382 | &dev_attr_iface_enabled.attr, | |
383 | &dev_attr_iface_vlan.attr, | |
4223b9e9 MC |
384 | &dev_attr_iface_vlan_priority.attr, |
385 | &dev_attr_iface_vlan_enabled.attr, | |
8d07913d MC |
386 | &dev_attr_ipv4_iface_ipaddress.attr, |
387 | &dev_attr_ipv4_iface_gateway.attr, | |
388 | &dev_attr_ipv4_iface_subnet.attr, | |
389 | &dev_attr_ipv4_iface_bootproto.attr, | |
390 | &dev_attr_ipv6_iface_ipaddress.attr, | |
391 | &dev_attr_ipv6_iface_link_local_addr.attr, | |
392 | &dev_attr_ipv6_iface_router_addr.attr, | |
393 | &dev_attr_ipv6_iface_ipaddr_autocfg.attr, | |
394 | &dev_attr_ipv6_iface_linklocal_autocfg.attr, | |
8c7d40fb | 395 | &dev_attr_iface_mtu.attr, |
fcb5124e | 396 | &dev_attr_iface_port.attr, |
8d07913d MC |
397 | NULL, |
398 | }; | |
399 | ||
400 | static struct attribute_group iscsi_iface_group = { | |
401 | .attrs = iscsi_iface_attrs, | |
402 | .is_visible = iscsi_iface_attr_is_visible, | |
403 | }; | |
404 | ||
405 | struct iscsi_iface * | |
406 | iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, | |
407 | uint32_t iface_type, uint32_t iface_num, int dd_size) | |
408 | { | |
409 | struct iscsi_iface *iface; | |
410 | int err; | |
411 | ||
412 | iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); | |
413 | if (!iface) | |
414 | return NULL; | |
415 | ||
416 | iface->transport = transport; | |
417 | iface->iface_type = iface_type; | |
418 | iface->iface_num = iface_num; | |
419 | iface->dev.release = iscsi_iface_release; | |
420 | iface->dev.class = &iscsi_iface_class; | |
421 | /* parent reference released in iscsi_iface_release */ | |
422 | iface->dev.parent = get_device(&shost->shost_gendev); | |
423 | if (iface_type == ISCSI_IFACE_TYPE_IPV4) | |
424 | dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, | |
425 | iface_num); | |
426 | else | |
427 | dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, | |
428 | iface_num); | |
429 | ||
430 | err = device_register(&iface->dev); | |
431 | if (err) | |
432 | goto free_iface; | |
433 | ||
434 | err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); | |
435 | if (err) | |
436 | goto unreg_iface; | |
437 | ||
438 | if (dd_size) | |
439 | iface->dd_data = &iface[1]; | |
440 | return iface; | |
441 | ||
442 | unreg_iface: | |
443 | device_unregister(&iface->dev); | |
444 | return NULL; | |
445 | ||
446 | free_iface: | |
447 | put_device(iface->dev.parent); | |
448 | kfree(iface); | |
449 | return NULL; | |
450 | } | |
451 | EXPORT_SYMBOL_GPL(iscsi_create_iface); | |
452 | ||
453 | void iscsi_destroy_iface(struct iscsi_iface *iface) | |
454 | { | |
455 | sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); | |
456 | device_unregister(&iface->dev); | |
457 | } | |
458 | EXPORT_SYMBOL_GPL(iscsi_destroy_iface); | |
459 | ||
90eeb01a MC |
460 | /* |
461 | * BSG support | |
462 | */ | |
463 | /** | |
464 | * iscsi_bsg_host_dispatch - Dispatch command to LLD. | |
465 | * @job: bsg job to be processed | |
466 | */ | |
467 | static int iscsi_bsg_host_dispatch(struct bsg_job *job) | |
468 | { | |
469 | struct Scsi_Host *shost = iscsi_job_to_shost(job); | |
470 | struct iscsi_bsg_request *req = job->request; | |
471 | struct iscsi_bsg_reply *reply = job->reply; | |
472 | struct iscsi_internal *i = to_iscsi_internal(shost->transportt); | |
473 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
474 | int ret; | |
475 | ||
476 | /* check if we have the msgcode value at least */ | |
477 | if (job->request_len < sizeof(uint32_t)) { | |
478 | ret = -ENOMSG; | |
479 | goto fail_host_msg; | |
480 | } | |
481 | ||
482 | /* Validate the host command */ | |
483 | switch (req->msgcode) { | |
484 | case ISCSI_BSG_HST_VENDOR: | |
485 | cmdlen += sizeof(struct iscsi_bsg_host_vendor); | |
486 | if ((shost->hostt->vendor_id == 0L) || | |
487 | (req->rqst_data.h_vendor.vendor_id != | |
488 | shost->hostt->vendor_id)) { | |
489 | ret = -ESRCH; | |
490 | goto fail_host_msg; | |
491 | } | |
492 | break; | |
493 | default: | |
494 | ret = -EBADR; | |
495 | goto fail_host_msg; | |
496 | } | |
497 | ||
498 | /* check if we really have all the request data needed */ | |
499 | if (job->request_len < cmdlen) { | |
500 | ret = -ENOMSG; | |
501 | goto fail_host_msg; | |
502 | } | |
503 | ||
504 | ret = i->iscsi_transport->bsg_request(job); | |
505 | if (!ret) | |
506 | return 0; | |
507 | ||
508 | fail_host_msg: | |
509 | /* return the errno failure code as the only status */ | |
510 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
511 | reply->reply_payload_rcv_len = 0; | |
512 | reply->result = ret; | |
513 | job->reply_len = sizeof(uint32_t); | |
514 | bsg_job_done(job, ret, 0); | |
515 | return 0; | |
516 | } | |
517 | ||
518 | /** | |
519 | * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests | |
520 | * @shost: shost for iscsi_host | |
521 | * @cls_host: iscsi_cls_host adding the structures to | |
522 | */ | |
523 | static int | |
524 | iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) | |
525 | { | |
526 | struct device *dev = &shost->shost_gendev; | |
527 | struct iscsi_internal *i = to_iscsi_internal(shost->transportt); | |
528 | struct request_queue *q; | |
529 | char bsg_name[20]; | |
530 | int ret; | |
531 | ||
532 | if (!i->iscsi_transport->bsg_request) | |
533 | return -ENOTSUPP; | |
534 | ||
535 | snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); | |
536 | ||
537 | q = __scsi_alloc_queue(shost, bsg_request_fn); | |
538 | if (!q) | |
539 | return -ENOMEM; | |
540 | ||
541 | ret = bsg_setup_queue(dev, q, bsg_name, iscsi_bsg_host_dispatch, 0); | |
542 | if (ret) { | |
543 | shost_printk(KERN_ERR, shost, "bsg interface failed to " | |
544 | "initialize - no request queue\n"); | |
545 | blk_cleanup_queue(q); | |
546 | return ret; | |
547 | } | |
548 | ||
549 | ihost->bsg_q = q; | |
550 | return 0; | |
551 | } | |
552 | ||
30a6c652 | 553 | static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
ee959b00 | 554 | struct device *cdev) |
30a6c652 MC |
555 | { |
556 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 557 | struct iscsi_cls_host *ihost = shost->shost_data; |
30a6c652 MC |
558 | |
559 | memset(ihost, 0, sizeof(*ihost)); | |
8aae18ad | 560 | atomic_set(&ihost->nr_scans, 0); |
7970634b | 561 | mutex_init(&ihost->mutex); |
90eeb01a MC |
562 | |
563 | iscsi_bsg_host_add(shost, ihost); | |
564 | /* ignore any bsg add error - we just can't do sgio */ | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | static int iscsi_remove_host(struct transport_container *tc, | |
570 | struct device *dev, struct device *cdev) | |
571 | { | |
572 | struct Scsi_Host *shost = dev_to_shost(dev); | |
573 | struct iscsi_cls_host *ihost = shost->shost_data; | |
574 | ||
575 | if (ihost->bsg_q) { | |
576 | bsg_remove_queue(ihost->bsg_q); | |
577 | blk_cleanup_queue(ihost->bsg_q); | |
578 | } | |
30a6c652 MC |
579 | return 0; |
580 | } | |
581 | ||
582 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
583 | "iscsi_host", | |
584 | iscsi_setup_host, | |
90eeb01a | 585 | iscsi_remove_host, |
30a6c652 MC |
586 | NULL); |
587 | ||
0896b752 AA |
588 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
589 | "iscsi_session", | |
1da177e4 LT |
590 | NULL, |
591 | NULL, | |
592 | NULL); | |
593 | ||
0896b752 AA |
594 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
595 | "iscsi_connection", | |
1da177e4 LT |
596 | NULL, |
597 | NULL, | |
598 | NULL); | |
0896b752 AA |
599 | |
600 | static struct sock *nls; | |
0b950672 | 601 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 602 | |
7b7232f3 MC |
603 | static LIST_HEAD(sesslist); |
604 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
605 | static LIST_HEAD(connlist); |
606 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 607 | |
b5c7a12d MC |
608 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
609 | { | |
610 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
611 | return sess->sid; | |
612 | } | |
613 | ||
614 | /* | |
615 | * Returns the matching session to a given sid | |
616 | */ | |
617 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
618 | { |
619 | unsigned long flags; | |
620 | struct iscsi_cls_session *sess; | |
621 | ||
622 | spin_lock_irqsave(&sesslock, flags); | |
623 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 624 | if (sess->sid == sid) { |
7b7232f3 MC |
625 | spin_unlock_irqrestore(&sesslock, flags); |
626 | return sess; | |
627 | } | |
628 | } | |
629 | spin_unlock_irqrestore(&sesslock, flags); | |
630 | return NULL; | |
631 | } | |
632 | ||
b5c7a12d MC |
633 | /* |
634 | * Returns the matching connection to a given sid / cid tuple | |
635 | */ | |
636 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
637 | { |
638 | unsigned long flags; | |
639 | struct iscsi_cls_conn *conn; | |
640 | ||
641 | spin_lock_irqsave(&connlock, flags); | |
642 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 643 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
644 | spin_unlock_irqrestore(&connlock, flags); |
645 | return conn; | |
646 | } | |
647 | } | |
648 | spin_unlock_irqrestore(&connlock, flags); | |
649 | return NULL; | |
650 | } | |
651 | ||
7b8631b5 MC |
652 | /* |
653 | * The following functions can be used by LLDs that allocate | |
654 | * their own scsi_hosts or by software iscsi LLDs | |
655 | */ | |
6eabafbe MC |
656 | static struct { |
657 | int value; | |
658 | char *name; | |
659 | } iscsi_session_state_names[] = { | |
660 | { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, | |
661 | { ISCSI_SESSION_FAILED, "FAILED" }, | |
662 | { ISCSI_SESSION_FREE, "FREE" }, | |
663 | }; | |
664 | ||
3b0f208a | 665 | static const char *iscsi_session_state_name(int state) |
6eabafbe MC |
666 | { |
667 | int i; | |
668 | char *name = NULL; | |
669 | ||
670 | for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { | |
671 | if (iscsi_session_state_names[i].value == state) { | |
672 | name = iscsi_session_state_names[i].name; | |
673 | break; | |
674 | } | |
675 | } | |
676 | return name; | |
677 | } | |
678 | ||
679 | int iscsi_session_chkready(struct iscsi_cls_session *session) | |
680 | { | |
681 | unsigned long flags; | |
682 | int err; | |
683 | ||
684 | spin_lock_irqsave(&session->lock, flags); | |
685 | switch (session->state) { | |
686 | case ISCSI_SESSION_LOGGED_IN: | |
687 | err = 0; | |
688 | break; | |
689 | case ISCSI_SESSION_FAILED: | |
9a1a69a1 | 690 | err = DID_IMM_RETRY << 16; |
6eabafbe MC |
691 | break; |
692 | case ISCSI_SESSION_FREE: | |
56d7fcfa | 693 | err = DID_TRANSPORT_FAILFAST << 16; |
6eabafbe MC |
694 | break; |
695 | default: | |
696 | err = DID_NO_CONNECT << 16; | |
697 | break; | |
698 | } | |
699 | spin_unlock_irqrestore(&session->lock, flags); | |
700 | return err; | |
701 | } | |
702 | EXPORT_SYMBOL_GPL(iscsi_session_chkready); | |
703 | ||
17fa575e MR |
704 | int iscsi_is_session_online(struct iscsi_cls_session *session) |
705 | { | |
706 | unsigned long flags; | |
707 | int ret = 0; | |
708 | ||
709 | spin_lock_irqsave(&session->lock, flags); | |
710 | if (session->state == ISCSI_SESSION_LOGGED_IN) | |
711 | ret = 1; | |
712 | spin_unlock_irqrestore(&session->lock, flags); | |
713 | return ret; | |
714 | } | |
715 | EXPORT_SYMBOL_GPL(iscsi_is_session_online); | |
716 | ||
7b8631b5 MC |
717 | static void iscsi_session_release(struct device *dev) |
718 | { | |
719 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 720 | struct Scsi_Host *shost; |
0896b752 | 721 | |
7b8631b5 MC |
722 | shost = iscsi_session_to_shost(session); |
723 | scsi_host_put(shost); | |
632248aa | 724 | ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); |
7b8631b5 | 725 | kfree(session); |
7b8631b5 | 726 | } |
0896b752 | 727 | |
7b8631b5 MC |
728 | static int iscsi_is_session_dev(const struct device *dev) |
729 | { | |
730 | return dev->release == iscsi_session_release; | |
731 | } | |
0896b752 | 732 | |
a4804cd6 MC |
733 | static int iscsi_iter_session_fn(struct device *dev, void *data) |
734 | { | |
735 | void (* fn) (struct iscsi_cls_session *) = data; | |
736 | ||
737 | if (!iscsi_is_session_dev(dev)) | |
738 | return 0; | |
739 | fn(iscsi_dev_to_session(dev)); | |
740 | return 0; | |
741 | } | |
742 | ||
743 | void iscsi_host_for_each_session(struct Scsi_Host *shost, | |
744 | void (*fn)(struct iscsi_cls_session *)) | |
745 | { | |
746 | device_for_each_child(&shost->shost_gendev, fn, | |
747 | iscsi_iter_session_fn); | |
748 | } | |
749 | EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); | |
750 | ||
8aae18ad MC |
751 | /** |
752 | * iscsi_scan_finished - helper to report when running scans are done | |
753 | * @shost: scsi host | |
754 | * @time: scan run time | |
755 | * | |
756 | * This function can be used by drives like qla4xxx to report to the scsi | |
757 | * layer when the scans it kicked off at module load time are done. | |
758 | */ | |
759 | int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
760 | { | |
32c6e1b9 | 761 | struct iscsi_cls_host *ihost = shost->shost_data; |
8aae18ad MC |
762 | /* |
763 | * qla4xxx will have kicked off some session unblocks before calling | |
764 | * scsi_scan_host, so just wait for them to complete. | |
765 | */ | |
766 | return !atomic_read(&ihost->nr_scans); | |
767 | } | |
768 | EXPORT_SYMBOL_GPL(iscsi_scan_finished); | |
769 | ||
7970634b MC |
770 | struct iscsi_scan_data { |
771 | unsigned int channel; | |
772 | unsigned int id; | |
773 | unsigned int lun; | |
774 | }; | |
775 | ||
776 | static int iscsi_user_scan_session(struct device *dev, void *data) | |
30a6c652 | 777 | { |
7970634b | 778 | struct iscsi_scan_data *scan_data = data; |
30a6c652 | 779 | struct iscsi_cls_session *session; |
7970634b MC |
780 | struct Scsi_Host *shost; |
781 | struct iscsi_cls_host *ihost; | |
782 | unsigned long flags; | |
783 | unsigned int id; | |
784 | ||
785 | if (!iscsi_is_session_dev(dev)) | |
786 | return 0; | |
787 | ||
788 | session = iscsi_dev_to_session(dev); | |
632248aa MC |
789 | |
790 | ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); | |
791 | ||
7970634b MC |
792 | shost = iscsi_session_to_shost(session); |
793 | ihost = shost->shost_data; | |
30a6c652 MC |
794 | |
795 | mutex_lock(&ihost->mutex); | |
7970634b MC |
796 | spin_lock_irqsave(&session->lock, flags); |
797 | if (session->state != ISCSI_SESSION_LOGGED_IN) { | |
798 | spin_unlock_irqrestore(&session->lock, flags); | |
632248aa | 799 | goto user_scan_exit; |
30a6c652 | 800 | } |
7970634b MC |
801 | id = session->target_id; |
802 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 803 | |
7970634b MC |
804 | if (id != ISCSI_MAX_TARGET) { |
805 | if ((scan_data->channel == SCAN_WILD_CARD || | |
806 | scan_data->channel == 0) && | |
807 | (scan_data->id == SCAN_WILD_CARD || | |
808 | scan_data->id == id)) | |
809 | scsi_scan_target(&session->dev, 0, id, | |
810 | scan_data->lun, 1); | |
811 | } | |
632248aa MC |
812 | |
813 | user_scan_exit: | |
7970634b | 814 | mutex_unlock(&ihost->mutex); |
632248aa | 815 | ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); |
30a6c652 MC |
816 | return 0; |
817 | } | |
818 | ||
7970634b MC |
819 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
820 | uint id, uint lun) | |
821 | { | |
822 | struct iscsi_scan_data scan_data; | |
823 | ||
824 | scan_data.channel = channel; | |
825 | scan_data.id = id; | |
826 | scan_data.lun = lun; | |
827 | ||
828 | return device_for_each_child(&shost->shost_gendev, &scan_data, | |
829 | iscsi_user_scan_session); | |
830 | } | |
831 | ||
bd976f62 MC |
832 | static void iscsi_scan_session(struct work_struct *work) |
833 | { | |
834 | struct iscsi_cls_session *session = | |
835 | container_of(work, struct iscsi_cls_session, scan_work); | |
8aae18ad | 836 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 837 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 838 | struct iscsi_scan_data scan_data; |
bd976f62 | 839 | |
7970634b MC |
840 | scan_data.channel = 0; |
841 | scan_data.id = SCAN_WILD_CARD; | |
842 | scan_data.lun = SCAN_WILD_CARD; | |
bd976f62 | 843 | |
7970634b | 844 | iscsi_user_scan_session(&session->dev, &scan_data); |
8aae18ad | 845 | atomic_dec(&ihost->nr_scans); |
bd976f62 MC |
846 | } |
847 | ||
c01be6dc MC |
848 | /** |
849 | * iscsi_block_scsi_eh - block scsi eh until session state has transistioned | |
e6d4ef45 | 850 | * @cmd: scsi cmd passed to scsi eh handler |
c01be6dc MC |
851 | * |
852 | * If the session is down this function will wait for the recovery | |
853 | * timer to fire or for the session to be logged back in. If the | |
854 | * recovery timer fires then FAST_IO_FAIL is returned. The caller | |
855 | * should pass this error value to the scsi eh. | |
856 | */ | |
857 | int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) | |
858 | { | |
859 | struct iscsi_cls_session *session = | |
860 | starget_to_session(scsi_target(cmd->device)); | |
861 | unsigned long flags; | |
862 | int ret = 0; | |
863 | ||
864 | spin_lock_irqsave(&session->lock, flags); | |
865 | while (session->state != ISCSI_SESSION_LOGGED_IN) { | |
866 | if (session->state == ISCSI_SESSION_FREE) { | |
867 | ret = FAST_IO_FAIL; | |
868 | break; | |
869 | } | |
870 | spin_unlock_irqrestore(&session->lock, flags); | |
871 | msleep(1000); | |
872 | spin_lock_irqsave(&session->lock, flags); | |
873 | } | |
874 | spin_unlock_irqrestore(&session->lock, flags); | |
875 | return ret; | |
876 | } | |
877 | EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); | |
878 | ||
c4028958 | 879 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 880 | { |
c4028958 DH |
881 | struct iscsi_cls_session *session = |
882 | container_of(work, struct iscsi_cls_session, | |
883 | recovery_work.work); | |
6eabafbe | 884 | unsigned long flags; |
30a6c652 | 885 | |
322d739d MC |
886 | iscsi_cls_session_printk(KERN_INFO, session, |
887 | "session recovery timed out after %d secs\n", | |
888 | session->recovery_tmo); | |
30a6c652 | 889 | |
6eabafbe MC |
890 | spin_lock_irqsave(&session->lock, flags); |
891 | switch (session->state) { | |
892 | case ISCSI_SESSION_FAILED: | |
893 | session->state = ISCSI_SESSION_FREE; | |
894 | break; | |
895 | case ISCSI_SESSION_LOGGED_IN: | |
896 | case ISCSI_SESSION_FREE: | |
897 | /* we raced with the unblock's flush */ | |
898 | spin_unlock_irqrestore(&session->lock, flags); | |
899 | return; | |
900 | } | |
901 | spin_unlock_irqrestore(&session->lock, flags); | |
902 | ||
30a6c652 MC |
903 | if (session->transport->session_recovery_timedout) |
904 | session->transport->session_recovery_timedout(session); | |
905 | ||
632248aa | 906 | ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); |
30a6c652 | 907 | scsi_target_unblock(&session->dev); |
632248aa | 908 | ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); |
30a6c652 MC |
909 | } |
910 | ||
45ab33b6 | 911 | static void __iscsi_unblock_session(struct work_struct *work) |
6eabafbe | 912 | { |
45ab33b6 MC |
913 | struct iscsi_cls_session *session = |
914 | container_of(work, struct iscsi_cls_session, | |
915 | unblock_work); | |
bd976f62 | 916 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 917 | struct iscsi_cls_host *ihost = shost->shost_data; |
6eabafbe MC |
918 | unsigned long flags; |
919 | ||
632248aa | 920 | ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); |
45ab33b6 MC |
921 | /* |
922 | * The recovery and unblock work get run from the same workqueue, | |
923 | * so try to cancel it if it was going to run after this unblock. | |
924 | */ | |
925 | cancel_delayed_work(&session->recovery_work); | |
6eabafbe MC |
926 | spin_lock_irqsave(&session->lock, flags); |
927 | session->state = ISCSI_SESSION_LOGGED_IN; | |
928 | spin_unlock_irqrestore(&session->lock, flags); | |
45ab33b6 MC |
929 | /* start IO */ |
930 | scsi_target_unblock(&session->dev); | |
8aae18ad MC |
931 | /* |
932 | * Only do kernel scanning if the driver is properly hooked into | |
933 | * the async scanning code (drivers like iscsi_tcp do login and | |
934 | * scanning from userspace). | |
935 | */ | |
936 | if (shost->hostt->scan_finished) { | |
06d25af4 | 937 | if (scsi_queue_work(shost, &session->scan_work)) |
8aae18ad MC |
938 | atomic_inc(&ihost->nr_scans); |
939 | } | |
632248aa | 940 | ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); |
6eabafbe | 941 | } |
45ab33b6 MC |
942 | |
943 | /** | |
944 | * iscsi_unblock_session - set a session as logged in and start IO. | |
945 | * @session: iscsi session | |
946 | * | |
947 | * Mark a session as ready to accept IO. | |
948 | */ | |
949 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
950 | { | |
951 | queue_work(iscsi_eh_timer_workq, &session->unblock_work); | |
952 | /* | |
953 | * make sure all the events have completed before tell the driver | |
954 | * it is safe | |
955 | */ | |
956 | flush_workqueue(iscsi_eh_timer_workq); | |
957 | } | |
30a6c652 MC |
958 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
959 | ||
45ab33b6 | 960 | static void __iscsi_block_session(struct work_struct *work) |
30a6c652 | 961 | { |
45ab33b6 MC |
962 | struct iscsi_cls_session *session = |
963 | container_of(work, struct iscsi_cls_session, | |
964 | block_work); | |
6eabafbe MC |
965 | unsigned long flags; |
966 | ||
632248aa | 967 | ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); |
6eabafbe MC |
968 | spin_lock_irqsave(&session->lock, flags); |
969 | session->state = ISCSI_SESSION_FAILED; | |
970 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 971 | scsi_target_block(&session->dev); |
632248aa | 972 | ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); |
fdd46dcb MC |
973 | if (session->recovery_tmo >= 0) |
974 | queue_delayed_work(iscsi_eh_timer_workq, | |
975 | &session->recovery_work, | |
976 | session->recovery_tmo * HZ); | |
30a6c652 | 977 | } |
45ab33b6 MC |
978 | |
979 | void iscsi_block_session(struct iscsi_cls_session *session) | |
980 | { | |
981 | queue_work(iscsi_eh_timer_workq, &session->block_work); | |
982 | } | |
30a6c652 MC |
983 | EXPORT_SYMBOL_GPL(iscsi_block_session); |
984 | ||
26974789 MC |
985 | static void __iscsi_unbind_session(struct work_struct *work) |
986 | { | |
987 | struct iscsi_cls_session *session = | |
988 | container_of(work, struct iscsi_cls_session, | |
989 | unbind_work); | |
990 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 991 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 992 | unsigned long flags; |
26974789 | 993 | |
632248aa MC |
994 | ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); |
995 | ||
26974789 MC |
996 | /* Prevent new scans and make sure scanning is not in progress */ |
997 | mutex_lock(&ihost->mutex); | |
7970634b MC |
998 | spin_lock_irqsave(&session->lock, flags); |
999 | if (session->target_id == ISCSI_MAX_TARGET) { | |
1000 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
1001 | mutex_unlock(&ihost->mutex); |
1002 | return; | |
1003 | } | |
7970634b MC |
1004 | session->target_id = ISCSI_MAX_TARGET; |
1005 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
1006 | mutex_unlock(&ihost->mutex); |
1007 | ||
1008 | scsi_remove_target(&session->dev); | |
1009 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
632248aa | 1010 | ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); |
26974789 MC |
1011 | } |
1012 | ||
7b8631b5 | 1013 | struct iscsi_cls_session * |
5d91e209 MC |
1014 | iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
1015 | int dd_size) | |
7b8631b5 MC |
1016 | { |
1017 | struct iscsi_cls_session *session; | |
7b8631b5 | 1018 | |
5d91e209 | 1019 | session = kzalloc(sizeof(*session) + dd_size, |
b5c7a12d | 1020 | GFP_KERNEL); |
7b8631b5 | 1021 | if (!session) |
f53a88da MC |
1022 | return NULL; |
1023 | ||
7b8631b5 | 1024 | session->transport = transport; |
30a6c652 | 1025 | session->recovery_tmo = 120; |
6eabafbe | 1026 | session->state = ISCSI_SESSION_FREE; |
c4028958 | 1027 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 | 1028 | INIT_LIST_HEAD(&session->sess_list); |
45ab33b6 MC |
1029 | INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
1030 | INIT_WORK(&session->block_work, __iscsi_block_session); | |
26974789 | 1031 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
bd976f62 | 1032 | INIT_WORK(&session->scan_work, iscsi_scan_session); |
6eabafbe | 1033 | spin_lock_init(&session->lock); |
7b8631b5 | 1034 | |
6a8a0d36 MC |
1035 | /* this is released in the dev's release function */ |
1036 | scsi_host_get(shost); | |
8434aa8b MC |
1037 | session->dev.parent = &shost->shost_gendev; |
1038 | session->dev.release = iscsi_session_release; | |
1039 | device_initialize(&session->dev); | |
5d91e209 | 1040 | if (dd_size) |
b5c7a12d | 1041 | session->dd_data = &session[1]; |
632248aa MC |
1042 | |
1043 | ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); | |
8434aa8b MC |
1044 | return session; |
1045 | } | |
1046 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
1047 | ||
7970634b MC |
1048 | static int iscsi_get_next_target_id(struct device *dev, void *data) |
1049 | { | |
1050 | struct iscsi_cls_session *session; | |
1051 | unsigned long flags; | |
1052 | int err = 0; | |
1053 | ||
1054 | if (!iscsi_is_session_dev(dev)) | |
1055 | return 0; | |
1056 | ||
1057 | session = iscsi_dev_to_session(dev); | |
1058 | spin_lock_irqsave(&session->lock, flags); | |
1059 | if (*((unsigned int *) data) == session->target_id) | |
1060 | err = -EEXIST; | |
1061 | spin_unlock_irqrestore(&session->lock, flags); | |
1062 | return err; | |
1063 | } | |
1064 | ||
6a8a0d36 | 1065 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
1066 | { |
1067 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 1068 | struct iscsi_cls_host *ihost; |
26974789 | 1069 | unsigned long flags; |
7970634b | 1070 | unsigned int id = target_id; |
8434aa8b | 1071 | int err; |
b5c7a12d | 1072 | |
30a6c652 | 1073 | ihost = shost->shost_data; |
41be1444 | 1074 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
7970634b MC |
1075 | |
1076 | if (id == ISCSI_MAX_TARGET) { | |
1077 | for (id = 0; id < ISCSI_MAX_TARGET; id++) { | |
1078 | err = device_for_each_child(&shost->shost_gendev, &id, | |
1079 | iscsi_get_next_target_id); | |
1080 | if (!err) | |
1081 | break; | |
1082 | } | |
1083 | ||
1084 | if (id == ISCSI_MAX_TARGET) { | |
1085 | iscsi_cls_session_printk(KERN_ERR, session, | |
1086 | "Too many iscsi targets. Max " | |
1087 | "number of targets is %d.\n", | |
1088 | ISCSI_MAX_TARGET - 1); | |
24add1c4 | 1089 | err = -EOVERFLOW; |
7970634b MC |
1090 | goto release_host; |
1091 | } | |
1092 | } | |
1093 | session->target_id = id; | |
30a6c652 | 1094 | |
71610f55 | 1095 | dev_set_name(&session->dev, "session%u", session->sid); |
8434aa8b | 1096 | err = device_add(&session->dev); |
7b8631b5 | 1097 | if (err) { |
322d739d MC |
1098 | iscsi_cls_session_printk(KERN_ERR, session, |
1099 | "could not register session's dev\n"); | |
8434aa8b | 1100 | goto release_host; |
7b8631b5 MC |
1101 | } |
1102 | transport_register_device(&session->dev); | |
1103 | ||
26974789 MC |
1104 | spin_lock_irqsave(&sesslock, flags); |
1105 | list_add(&session->sess_list, &sesslist); | |
1106 | spin_unlock_irqrestore(&sesslock, flags); | |
1107 | ||
26974789 | 1108 | iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); |
632248aa | 1109 | ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); |
8434aa8b | 1110 | return 0; |
30a6c652 | 1111 | |
8434aa8b MC |
1112 | release_host: |
1113 | scsi_host_put(shost); | |
1114 | return err; | |
7b8631b5 | 1115 | } |
8434aa8b | 1116 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
1117 | |
1118 | /** | |
8434aa8b MC |
1119 | * iscsi_create_session - create iscsi class session |
1120 | * @shost: scsi host | |
1121 | * @transport: iscsi transport | |
5d91e209 | 1122 | * @dd_size: private driver data size |
eb44820c | 1123 | * @target_id: which target |
7b8631b5 | 1124 | * |
8434aa8b | 1125 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 1126 | */ |
8434aa8b | 1127 | struct iscsi_cls_session * |
5d91e209 MC |
1128 | iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
1129 | int dd_size, unsigned int target_id) | |
8434aa8b MC |
1130 | { |
1131 | struct iscsi_cls_session *session; | |
1132 | ||
5d91e209 | 1133 | session = iscsi_alloc_session(shost, transport, dd_size); |
8434aa8b MC |
1134 | if (!session) |
1135 | return NULL; | |
1136 | ||
6a8a0d36 | 1137 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
1138 | iscsi_free_session(session); |
1139 | return NULL; | |
1140 | } | |
1141 | return session; | |
1142 | } | |
1143 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
1144 | ||
26974789 MC |
1145 | static void iscsi_conn_release(struct device *dev) |
1146 | { | |
1147 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
1148 | struct device *parent = conn->dev.parent; | |
1149 | ||
632248aa | 1150 | ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); |
26974789 MC |
1151 | kfree(conn); |
1152 | put_device(parent); | |
1153 | } | |
1154 | ||
1155 | static int iscsi_is_conn_dev(const struct device *dev) | |
1156 | { | |
1157 | return dev->release == iscsi_conn_release; | |
1158 | } | |
1159 | ||
1160 | static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) | |
1161 | { | |
1162 | if (!iscsi_is_conn_dev(dev)) | |
1163 | return 0; | |
1164 | return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); | |
1165 | } | |
1166 | ||
8434aa8b | 1167 | void iscsi_remove_session(struct iscsi_cls_session *session) |
7b8631b5 | 1168 | { |
30a6c652 | 1169 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
26974789 MC |
1170 | unsigned long flags; |
1171 | int err; | |
1172 | ||
632248aa MC |
1173 | ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); |
1174 | ||
26974789 MC |
1175 | spin_lock_irqsave(&sesslock, flags); |
1176 | list_del(&session->sess_list); | |
1177 | spin_unlock_irqrestore(&sesslock, flags); | |
30a6c652 | 1178 | |
45ab33b6 MC |
1179 | /* make sure there are no blocks/unblocks queued */ |
1180 | flush_workqueue(iscsi_eh_timer_workq); | |
1181 | /* make sure the timedout callout is not running */ | |
1182 | if (!cancel_delayed_work(&session->recovery_work)) | |
1183 | flush_workqueue(iscsi_eh_timer_workq); | |
26974789 MC |
1184 | /* |
1185 | * If we are blocked let commands flow again. The lld or iscsi | |
1186 | * layer should set up the queuecommand to fail commands. | |
45ab33b6 MC |
1187 | * We assume that LLD will not be calling block/unblock while |
1188 | * removing the session. | |
26974789 | 1189 | */ |
6eabafbe MC |
1190 | spin_lock_irqsave(&session->lock, flags); |
1191 | session->state = ISCSI_SESSION_FREE; | |
1192 | spin_unlock_irqrestore(&session->lock, flags); | |
bd976f62 | 1193 | |
45ab33b6 MC |
1194 | scsi_target_unblock(&session->dev); |
1195 | /* flush running scans then delete devices */ | |
06d25af4 | 1196 | scsi_flush_work(shost); |
45ab33b6 | 1197 | __iscsi_unbind_session(&session->unbind_work); |
30a6c652 | 1198 | |
26974789 MC |
1199 | /* hw iscsi may not have removed all connections from session */ |
1200 | err = device_for_each_child(&session->dev, NULL, | |
1201 | iscsi_iter_destroy_conn_fn); | |
1202 | if (err) | |
322d739d MC |
1203 | iscsi_cls_session_printk(KERN_ERR, session, |
1204 | "Could not delete all connections " | |
1205 | "for session. Error %d.\n", err); | |
8434aa8b | 1206 | |
7b8631b5 | 1207 | transport_unregister_device(&session->dev); |
632248aa MC |
1208 | |
1209 | ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); | |
8434aa8b MC |
1210 | device_del(&session->dev); |
1211 | } | |
1212 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
1213 | ||
1214 | void iscsi_free_session(struct iscsi_cls_session *session) | |
1215 | { | |
632248aa | 1216 | ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); |
26974789 | 1217 | iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
8434aa8b | 1218 | put_device(&session->dev); |
7b8631b5 | 1219 | } |
8434aa8b MC |
1220 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
1221 | ||
1222 | /** | |
1223 | * iscsi_destroy_session - destroy iscsi session | |
1224 | * @session: iscsi_session | |
1225 | * | |
1226 | * Can be called by a LLD or iscsi_transport. There must not be | |
1227 | * any running connections. | |
eb44820c | 1228 | */ |
8434aa8b MC |
1229 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
1230 | { | |
1231 | iscsi_remove_session(session); | |
632248aa | 1232 | ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n"); |
8434aa8b MC |
1233 | iscsi_free_session(session); |
1234 | return 0; | |
1235 | } | |
7b8631b5 MC |
1236 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
1237 | ||
7b8631b5 MC |
1238 | /** |
1239 | * iscsi_create_conn - create iscsi class connection | |
1240 | * @session: iscsi cls session | |
5d91e209 | 1241 | * @dd_size: private driver data size |
7b8631b5 MC |
1242 | * @cid: connection id |
1243 | * | |
1244 | * This can be called from a LLD or iscsi_transport. The connection | |
1245 | * is child of the session so cid must be unique for all connections | |
1246 | * on the session. | |
b5c7a12d MC |
1247 | * |
1248 | * Since we do not support MCS, cid will normally be zero. In some cases | |
1249 | * for software iscsi we could be trying to preallocate a connection struct | |
1250 | * in which case there could be two connection structs and cid would be | |
1251 | * non-zero. | |
eb44820c | 1252 | */ |
7b8631b5 | 1253 | struct iscsi_cls_conn * |
5d91e209 | 1254 | iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) |
7b8631b5 MC |
1255 | { |
1256 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 | 1257 | struct iscsi_cls_conn *conn; |
26974789 | 1258 | unsigned long flags; |
7b8631b5 MC |
1259 | int err; |
1260 | ||
5d91e209 | 1261 | conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); |
7b8631b5 MC |
1262 | if (!conn) |
1263 | return NULL; | |
5d91e209 | 1264 | if (dd_size) |
7b8631b5 MC |
1265 | conn->dd_data = &conn[1]; |
1266 | ||
22a39fbb | 1267 | mutex_init(&conn->ep_mutex); |
7b8631b5 MC |
1268 | INIT_LIST_HEAD(&conn->conn_list); |
1269 | conn->transport = transport; | |
b5c7a12d | 1270 | conn->cid = cid; |
7b8631b5 MC |
1271 | |
1272 | /* this is released in the dev's release function */ | |
1273 | if (!get_device(&session->dev)) | |
43a145a3 | 1274 | goto free_conn; |
b5c7a12d | 1275 | |
71610f55 | 1276 | dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); |
7b8631b5 MC |
1277 | conn->dev.parent = &session->dev; |
1278 | conn->dev.release = iscsi_conn_release; | |
1279 | err = device_register(&conn->dev); | |
1280 | if (err) { | |
322d739d MC |
1281 | iscsi_cls_session_printk(KERN_ERR, session, "could not " |
1282 | "register connection's dev\n"); | |
7b8631b5 MC |
1283 | goto release_parent_ref; |
1284 | } | |
1285 | transport_register_device(&conn->dev); | |
26974789 MC |
1286 | |
1287 | spin_lock_irqsave(&connlock, flags); | |
1288 | list_add(&conn->conn_list, &connlist); | |
26974789 | 1289 | spin_unlock_irqrestore(&connlock, flags); |
632248aa MC |
1290 | |
1291 | ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); | |
7b8631b5 MC |
1292 | return conn; |
1293 | ||
1294 | release_parent_ref: | |
1295 | put_device(&session->dev); | |
1296 | free_conn: | |
1297 | kfree(conn); | |
1298 | return NULL; | |
1299 | } | |
1300 | ||
1301 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
1302 | ||
1303 | /** | |
1304 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 1305 | * @conn: iscsi cls session |
7b8631b5 | 1306 | * |
26974789 | 1307 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 1308 | */ |
7b8631b5 MC |
1309 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
1310 | { | |
26974789 MC |
1311 | unsigned long flags; |
1312 | ||
1313 | spin_lock_irqsave(&connlock, flags); | |
26974789 MC |
1314 | list_del(&conn->conn_list); |
1315 | spin_unlock_irqrestore(&connlock, flags); | |
1316 | ||
7b8631b5 | 1317 | transport_unregister_device(&conn->dev); |
632248aa | 1318 | ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); |
7b8631b5 MC |
1319 | device_unregister(&conn->dev); |
1320 | return 0; | |
1321 | } | |
7b8631b5 MC |
1322 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
1323 | ||
7b8631b5 MC |
1324 | /* |
1325 | * iscsi interface functions | |
1326 | */ | |
0896b752 AA |
1327 | static struct iscsi_internal * |
1328 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
1329 | { | |
1330 | struct iscsi_internal *priv; | |
1331 | unsigned long flags; | |
1332 | ||
1333 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1334 | list_for_each_entry(priv, &iscsi_transports, list) { | |
1335 | if (tt == priv->iscsi_transport) { | |
1336 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1337 | return priv; | |
1338 | } | |
1339 | } | |
1340 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1341 | return NULL; | |
1342 | } | |
1da177e4 | 1343 | |
53cb8a1f | 1344 | static int |
43514774 | 1345 | iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) |
53cb8a1f | 1346 | { |
43514774 | 1347 | return nlmsg_multicast(nls, skb, 0, group, gfp); |
1da177e4 | 1348 | } |
1da177e4 | 1349 | |
7b7232f3 | 1350 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 1351 | char *data, uint32_t data_size) |
1da177e4 | 1352 | { |
0896b752 AA |
1353 | struct nlmsghdr *nlh; |
1354 | struct sk_buff *skb; | |
1355 | struct iscsi_uevent *ev; | |
0896b752 | 1356 | char *pdu; |
790f39a2 | 1357 | struct iscsi_internal *priv; |
0896b752 AA |
1358 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
1359 | data_size); | |
1360 | ||
790f39a2 MC |
1361 | priv = iscsi_if_transport_lookup(conn->transport); |
1362 | if (!priv) | |
1363 | return -EINVAL; | |
1364 | ||
43a145a3 | 1365 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1366 | if (!skb) { |
e5bd7b54 | 1367 | iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); |
322d739d MC |
1368 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
1369 | "control PDU: OOM\n"); | |
0896b752 AA |
1370 | return -ENOMEM; |
1371 | } | |
1da177e4 | 1372 | |
43514774 | 1373 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1374 | ev = NLMSG_DATA(nlh); |
1375 | memset(ev, 0, sizeof(*ev)); | |
1376 | ev->transport_handle = iscsi_handle(conn->transport); | |
1377 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
1378 | ev->r.recv_req.cid = conn->cid; |
1379 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
1380 | pdu = (char*)ev + sizeof(*ev); |
1381 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
1382 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 1383 | |
43514774 | 1384 | return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
1da177e4 | 1385 | } |
0896b752 | 1386 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 1387 | |
43514774 MC |
1388 | int iscsi_offload_mesg(struct Scsi_Host *shost, |
1389 | struct iscsi_transport *transport, uint32_t type, | |
1390 | char *data, uint16_t data_size) | |
1391 | { | |
1392 | struct nlmsghdr *nlh; | |
1393 | struct sk_buff *skb; | |
1394 | struct iscsi_uevent *ev; | |
1395 | int len = NLMSG_SPACE(sizeof(*ev) + data_size); | |
1396 | ||
a541f840 | 1397 | skb = alloc_skb(len, GFP_ATOMIC); |
43514774 MC |
1398 | if (!skb) { |
1399 | printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); | |
1400 | return -ENOMEM; | |
1401 | } | |
1402 | ||
1403 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); | |
1404 | ev = NLMSG_DATA(nlh); | |
1405 | memset(ev, 0, sizeof(*ev)); | |
1406 | ev->type = type; | |
1407 | ev->transport_handle = iscsi_handle(transport); | |
1408 | switch (type) { | |
1409 | case ISCSI_KEVENT_PATH_REQ: | |
1410 | ev->r.req_path.host_no = shost->host_no; | |
1411 | break; | |
1412 | case ISCSI_KEVENT_IF_DOWN: | |
1413 | ev->r.notify_if_down.host_no = shost->host_no; | |
1414 | break; | |
1415 | } | |
1416 | ||
1417 | memcpy((char *)ev + sizeof(*ev), data, data_size); | |
1418 | ||
a541f840 | 1419 | return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); |
43514774 MC |
1420 | } |
1421 | EXPORT_SYMBOL_GPL(iscsi_offload_mesg); | |
1422 | ||
e5bd7b54 | 1423 | void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 1424 | { |
0896b752 AA |
1425 | struct nlmsghdr *nlh; |
1426 | struct sk_buff *skb; | |
1427 | struct iscsi_uevent *ev; | |
790f39a2 | 1428 | struct iscsi_internal *priv; |
0896b752 AA |
1429 | int len = NLMSG_SPACE(sizeof(*ev)); |
1430 | ||
790f39a2 MC |
1431 | priv = iscsi_if_transport_lookup(conn->transport); |
1432 | if (!priv) | |
1433 | return; | |
1434 | ||
43a145a3 | 1435 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1436 | if (!skb) { |
322d739d MC |
1437 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
1438 | "conn error (%d)\n", error); | |
0896b752 AA |
1439 | return; |
1440 | } | |
1441 | ||
43514774 | 1442 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1443 | ev = NLMSG_DATA(nlh); |
1444 | ev->transport_handle = iscsi_handle(conn->transport); | |
1445 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 1446 | ev->r.connerror.error = error; |
b5c7a12d MC |
1447 | ev->r.connerror.cid = conn->cid; |
1448 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 1449 | |
43514774 | 1450 | iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
1da177e4 | 1451 | |
322d739d MC |
1452 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
1453 | error); | |
0896b752 | 1454 | } |
e5bd7b54 | 1455 | EXPORT_SYMBOL_GPL(iscsi_conn_error_event); |
0896b752 | 1456 | |
17fa575e MR |
1457 | void iscsi_conn_login_event(struct iscsi_cls_conn *conn, |
1458 | enum iscsi_conn_state state) | |
1459 | { | |
1460 | struct nlmsghdr *nlh; | |
1461 | struct sk_buff *skb; | |
1462 | struct iscsi_uevent *ev; | |
1463 | struct iscsi_internal *priv; | |
1464 | int len = NLMSG_SPACE(sizeof(*ev)); | |
1465 | ||
1466 | priv = iscsi_if_transport_lookup(conn->transport); | |
1467 | if (!priv) | |
1468 | return; | |
1469 | ||
1470 | skb = alloc_skb(len, GFP_ATOMIC); | |
1471 | if (!skb) { | |
1472 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " | |
1473 | "conn login (%d)\n", state); | |
1474 | return; | |
1475 | } | |
1476 | ||
1477 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); | |
1478 | ev = NLMSG_DATA(nlh); | |
1479 | ev->transport_handle = iscsi_handle(conn->transport); | |
1480 | ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; | |
1481 | ev->r.conn_login.state = state; | |
1482 | ev->r.conn_login.cid = conn->cid; | |
1483 | ev->r.conn_login.sid = iscsi_conn_get_sid(conn); | |
1484 | iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); | |
1485 | ||
1486 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", | |
1487 | state); | |
1488 | } | |
1489 | EXPORT_SYMBOL_GPL(iscsi_conn_login_event); | |
1490 | ||
0896b752 | 1491 | static int |
43514774 MC |
1492 | iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi, |
1493 | void *payload, int size) | |
0896b752 AA |
1494 | { |
1495 | struct sk_buff *skb; | |
1496 | struct nlmsghdr *nlh; | |
1497 | int len = NLMSG_SPACE(size); | |
1498 | int flags = multi ? NLM_F_MULTI : 0; | |
1499 | int t = done ? NLMSG_DONE : type; | |
1500 | ||
43a145a3 | 1501 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
1502 | if (!skb) { |
1503 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
1504 | return -ENOMEM; | |
1505 | } | |
0896b752 | 1506 | |
43514774 | 1507 | nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1508 | nlh->nlmsg_flags = flags; |
1509 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43514774 | 1510 | return iscsi_multicast_skb(skb, group, GFP_ATOMIC); |
1da177e4 | 1511 | } |
1da177e4 | 1512 | |
7b8631b5 | 1513 | static int |
5b940adf | 1514 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
1515 | { |
1516 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1517 | struct iscsi_stats *stats; | |
1518 | struct sk_buff *skbstat; | |
1519 | struct iscsi_cls_conn *conn; | |
1520 | struct nlmsghdr *nlhstat; | |
1521 | struct iscsi_uevent *evstat; | |
790f39a2 | 1522 | struct iscsi_internal *priv; |
7b8631b5 MC |
1523 | int len = NLMSG_SPACE(sizeof(*ev) + |
1524 | sizeof(struct iscsi_stats) + | |
1525 | sizeof(struct iscsi_stats_custom) * | |
1526 | ISCSI_STATS_CUSTOM_MAX); | |
1527 | int err = 0; | |
0896b752 | 1528 | |
790f39a2 MC |
1529 | priv = iscsi_if_transport_lookup(transport); |
1530 | if (!priv) | |
1531 | return -EINVAL; | |
1532 | ||
b5c7a12d | 1533 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
1534 | if (!conn) |
1535 | return -EEXIST; | |
0896b752 | 1536 | |
7b8631b5 MC |
1537 | do { |
1538 | int actual_size; | |
0896b752 | 1539 | |
43a145a3 | 1540 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 | 1541 | if (!skbstat) { |
322d739d MC |
1542 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
1543 | "deliver stats: OOM\n"); | |
7b8631b5 MC |
1544 | return -ENOMEM; |
1545 | } | |
1546 | ||
43514774 | 1547 | nlhstat = __nlmsg_put(skbstat, 0, 0, 0, |
7b8631b5 MC |
1548 | (len - sizeof(*nlhstat)), 0); |
1549 | evstat = NLMSG_DATA(nlhstat); | |
1550 | memset(evstat, 0, sizeof(*evstat)); | |
1551 | evstat->transport_handle = iscsi_handle(conn->transport); | |
1552 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
1553 | evstat->u.get_stats.cid = |
1554 | ev->u.get_stats.cid; | |
1555 | evstat->u.get_stats.sid = | |
1556 | ev->u.get_stats.sid; | |
7b8631b5 MC |
1557 | stats = (struct iscsi_stats *) |
1558 | ((char*)evstat + sizeof(*evstat)); | |
1559 | memset(stats, 0, sizeof(*stats)); | |
1560 | ||
7b7232f3 | 1561 | transport->get_stats(conn, stats); |
7b8631b5 MC |
1562 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
1563 | sizeof(struct iscsi_stats) + | |
1564 | sizeof(struct iscsi_stats_custom) * | |
1565 | stats->custom_length); | |
1566 | actual_size -= sizeof(*nlhstat); | |
1567 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 1568 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
1569 | nlhstat->nlmsg_len = actual_size; |
1570 | ||
43514774 MC |
1571 | err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, |
1572 | GFP_ATOMIC); | |
7b8631b5 MC |
1573 | } while (err < 0 && err != -ECONNREFUSED); |
1574 | ||
1575 | return err; | |
0896b752 AA |
1576 | } |
1577 | ||
53cb8a1f | 1578 | /** |
26974789 MC |
1579 | * iscsi_session_event - send session destr. completion event |
1580 | * @session: iscsi class session | |
1581 | * @event: type of event | |
eb44820c | 1582 | */ |
26974789 MC |
1583 | int iscsi_session_event(struct iscsi_cls_session *session, |
1584 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
1585 | { |
1586 | struct iscsi_internal *priv; | |
53cb8a1f MC |
1587 | struct Scsi_Host *shost; |
1588 | struct iscsi_uevent *ev; | |
1589 | struct sk_buff *skb; | |
1590 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
1591 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
1592 | ||
26974789 | 1593 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
1594 | if (!priv) |
1595 | return -EINVAL; | |
53cb8a1f MC |
1596 | shost = iscsi_session_to_shost(session); |
1597 | ||
43a145a3 | 1598 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 1599 | if (!skb) { |
322d739d MC |
1600 | iscsi_cls_session_printk(KERN_ERR, session, |
1601 | "Cannot notify userspace of session " | |
1602 | "event %u\n", event); | |
53cb8a1f MC |
1603 | return -ENOMEM; |
1604 | } | |
1605 | ||
43514774 | 1606 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
53cb8a1f | 1607 | ev = NLMSG_DATA(nlh); |
26974789 | 1608 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 1609 | |
26974789 MC |
1610 | ev->type = event; |
1611 | switch (event) { | |
1612 | case ISCSI_KEVENT_DESTROY_SESSION: | |
1613 | ev->r.d_session.host_no = shost->host_no; | |
1614 | ev->r.d_session.sid = session->sid; | |
1615 | break; | |
1616 | case ISCSI_KEVENT_CREATE_SESSION: | |
1617 | ev->r.c_session_ret.host_no = shost->host_no; | |
1618 | ev->r.c_session_ret.sid = session->sid; | |
1619 | break; | |
1620 | case ISCSI_KEVENT_UNBIND_SESSION: | |
1621 | ev->r.unbind_session.host_no = shost->host_no; | |
1622 | ev->r.unbind_session.sid = session->sid; | |
1623 | break; | |
1624 | default: | |
322d739d MC |
1625 | iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
1626 | "%u.\n", event); | |
26974789 | 1627 | kfree_skb(skb); |
53cb8a1f | 1628 | return -EINVAL; |
53cb8a1f MC |
1629 | } |
1630 | ||
53cb8a1f MC |
1631 | /* |
1632 | * this will occur if the daemon is not up, so we just warn | |
1633 | * the user and when the daemon is restarted it will handle it | |
1634 | */ | |
43514774 | 1635 | rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); |
ff491a73 | 1636 | if (rc == -ESRCH) |
322d739d MC |
1637 | iscsi_cls_session_printk(KERN_ERR, session, |
1638 | "Cannot notify userspace of session " | |
1639 | "event %u. Check iscsi daemon\n", | |
1640 | event); | |
632248aa MC |
1641 | |
1642 | ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", | |
1643 | event, rc); | |
53cb8a1f MC |
1644 | return rc; |
1645 | } | |
26974789 | 1646 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 1647 | |
0896b752 | 1648 | static int |
d82ff9be MC |
1649 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, |
1650 | struct iscsi_uevent *ev, uint32_t initial_cmdsn, | |
40753caa | 1651 | uint16_t cmds_max, uint16_t queue_depth) |
0896b752 AA |
1652 | { |
1653 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 1654 | struct iscsi_cls_session *session; |
5e7facb7 | 1655 | struct Scsi_Host *shost; |
0896b752 | 1656 | |
d82ff9be | 1657 | session = transport->create_session(ep, cmds_max, queue_depth, |
5e7facb7 | 1658 | initial_cmdsn); |
7b7232f3 | 1659 | if (!session) |
7b8631b5 | 1660 | return -ENOMEM; |
0896b752 | 1661 | |
5e7facb7 MC |
1662 | shost = iscsi_session_to_shost(session); |
1663 | ev->r.c_session_ret.host_no = shost->host_no; | |
b5c7a12d | 1664 | ev->r.c_session_ret.sid = session->sid; |
632248aa MC |
1665 | ISCSI_DBG_TRANS_SESSION(session, |
1666 | "Completed creating transport session\n"); | |
0896b752 | 1667 | return 0; |
0896b752 AA |
1668 | } |
1669 | ||
1670 | static int | |
7b7232f3 | 1671 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 1672 | { |
7b8631b5 | 1673 | struct iscsi_cls_conn *conn; |
7b7232f3 | 1674 | struct iscsi_cls_session *session; |
7b8631b5 | 1675 | |
b5c7a12d MC |
1676 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
1677 | if (!session) { | |
322d739d | 1678 | printk(KERN_ERR "iscsi: invalid session %d.\n", |
b5c7a12d | 1679 | ev->u.c_conn.sid); |
7b8631b5 | 1680 | return -EINVAL; |
b5c7a12d | 1681 | } |
0896b752 | 1682 | |
7b7232f3 | 1683 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d | 1684 | if (!conn) { |
322d739d MC |
1685 | iscsi_cls_session_printk(KERN_ERR, session, |
1686 | "couldn't create a new connection."); | |
7b7232f3 | 1687 | return -ENOMEM; |
b5c7a12d | 1688 | } |
0896b752 | 1689 | |
b5c7a12d MC |
1690 | ev->r.c_conn_ret.sid = session->sid; |
1691 | ev->r.c_conn_ret.cid = conn->cid; | |
632248aa MC |
1692 | |
1693 | ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); | |
0896b752 | 1694 | return 0; |
1da177e4 LT |
1695 | } |
1696 | ||
0896b752 AA |
1697 | static int |
1698 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1699 | { | |
7b8631b5 | 1700 | struct iscsi_cls_conn *conn; |
0896b752 | 1701 | |
b5c7a12d | 1702 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 1703 | if (!conn) |
7b8631b5 | 1704 | return -EINVAL; |
0896b752 | 1705 | |
632248aa | 1706 | ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); |
7b8631b5 MC |
1707 | if (transport->destroy_conn) |
1708 | transport->destroy_conn(conn); | |
632248aa | 1709 | |
7b8631b5 | 1710 | return 0; |
0896b752 AA |
1711 | } |
1712 | ||
fd7255f5 MC |
1713 | static int |
1714 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1715 | { | |
1716 | char *data = (char*)ev + sizeof(*ev); | |
1717 | struct iscsi_cls_conn *conn; | |
1718 | struct iscsi_cls_session *session; | |
a54a52ca | 1719 | int err = 0, value = 0; |
fd7255f5 MC |
1720 | |
1721 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
1722 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
1723 | if (!conn || !session) | |
1724 | return -EINVAL; | |
1725 | ||
1726 | switch (ev->u.set_param.param) { | |
30a6c652 | 1727 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 1728 | sscanf(data, "%d", &value); |
fdd46dcb | 1729 | session->recovery_tmo = value; |
30a6c652 | 1730 | break; |
fd7255f5 | 1731 | default: |
a54a52ca MC |
1732 | err = transport->set_param(conn, ev->u.set_param.param, |
1733 | data, ev->u.set_param.len); | |
fd7255f5 MC |
1734 | } |
1735 | ||
1736 | return err; | |
1737 | } | |
1738 | ||
10eb0f01 MC |
1739 | static int iscsi_if_ep_connect(struct iscsi_transport *transport, |
1740 | struct iscsi_uevent *ev, int msg_type) | |
1741 | { | |
1742 | struct iscsi_endpoint *ep; | |
1743 | struct sockaddr *dst_addr; | |
1744 | struct Scsi_Host *shost = NULL; | |
1745 | int non_blocking, err = 0; | |
1746 | ||
1747 | if (!transport->ep_connect) | |
1748 | return -EINVAL; | |
1749 | ||
1750 | if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { | |
1751 | shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); | |
1752 | if (!shost) { | |
1753 | printk(KERN_ERR "ep connect failed. Could not find " | |
1754 | "host no %u\n", | |
1755 | ev->u.ep_connect_through_host.host_no); | |
1756 | return -ENODEV; | |
1757 | } | |
1758 | non_blocking = ev->u.ep_connect_through_host.non_blocking; | |
1759 | } else | |
1760 | non_blocking = ev->u.ep_connect.non_blocking; | |
1761 | ||
1762 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
1763 | ep = transport->ep_connect(shost, dst_addr, non_blocking); | |
1764 | if (IS_ERR(ep)) { | |
1765 | err = PTR_ERR(ep); | |
1766 | goto release_host; | |
1767 | } | |
1768 | ||
1769 | ev->r.ep_connect_ret.handle = ep->id; | |
1770 | release_host: | |
1771 | if (shost) | |
1772 | scsi_host_put(shost); | |
1773 | return err; | |
1774 | } | |
1775 | ||
22a39fbb MC |
1776 | static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, |
1777 | u64 ep_handle) | |
1778 | { | |
1779 | struct iscsi_cls_conn *conn; | |
1780 | struct iscsi_endpoint *ep; | |
1781 | ||
1782 | if (!transport->ep_disconnect) | |
1783 | return -EINVAL; | |
1784 | ||
1785 | ep = iscsi_lookup_endpoint(ep_handle); | |
1786 | if (!ep) | |
1787 | return -EINVAL; | |
1788 | conn = ep->conn; | |
1789 | if (conn) { | |
1790 | mutex_lock(&conn->ep_mutex); | |
1791 | conn->ep = NULL; | |
1792 | mutex_unlock(&conn->ep_mutex); | |
1793 | } | |
1794 | ||
1795 | transport->ep_disconnect(ep); | |
1796 | return 0; | |
1797 | } | |
1798 | ||
264faaaa OG |
1799 | static int |
1800 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
1801 | struct iscsi_uevent *ev, int msg_type) | |
1802 | { | |
d82ff9be | 1803 | struct iscsi_endpoint *ep; |
264faaaa OG |
1804 | int rc = 0; |
1805 | ||
1806 | switch (msg_type) { | |
10eb0f01 | 1807 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: |
264faaaa | 1808 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
10eb0f01 | 1809 | rc = iscsi_if_ep_connect(transport, ev, msg_type); |
264faaaa OG |
1810 | break; |
1811 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1812 | if (!transport->ep_poll) | |
1813 | return -EINVAL; | |
1814 | ||
d82ff9be MC |
1815 | ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); |
1816 | if (!ep) | |
1817 | return -EINVAL; | |
1818 | ||
1819 | ev->r.retcode = transport->ep_poll(ep, | |
264faaaa OG |
1820 | ev->u.ep_poll.timeout_ms); |
1821 | break; | |
1822 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
22a39fbb MC |
1823 | rc = iscsi_if_ep_disconnect(transport, |
1824 | ev->u.ep_disconnect.ep_handle); | |
264faaaa OG |
1825 | break; |
1826 | } | |
1827 | return rc; | |
1828 | } | |
1829 | ||
01cb225d MC |
1830 | static int |
1831 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
1832 | struct iscsi_uevent *ev) | |
1833 | { | |
2174a04e | 1834 | struct Scsi_Host *shost; |
01cb225d | 1835 | struct sockaddr *dst_addr; |
2174a04e | 1836 | int err; |
01cb225d MC |
1837 | |
1838 | if (!transport->tgt_dscvr) | |
1839 | return -EINVAL; | |
1840 | ||
2174a04e | 1841 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
315cb0ad | 1842 | if (!shost) { |
2174a04e MC |
1843 | printk(KERN_ERR "target discovery could not find host no %u\n", |
1844 | ev->u.tgt_dscvr.host_no); | |
1845 | return -ENODEV; | |
1846 | } | |
1847 | ||
1848 | ||
01cb225d | 1849 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
1850 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
1851 | ev->u.tgt_dscvr.enable, dst_addr); | |
1852 | scsi_host_put(shost); | |
1853 | return err; | |
01cb225d MC |
1854 | } |
1855 | ||
1d9bf13a MC |
1856 | static int |
1857 | iscsi_set_host_param(struct iscsi_transport *transport, | |
1858 | struct iscsi_uevent *ev) | |
1859 | { | |
1860 | char *data = (char*)ev + sizeof(*ev); | |
1861 | struct Scsi_Host *shost; | |
1862 | int err; | |
1863 | ||
1864 | if (!transport->set_host_param) | |
1865 | return -ENOSYS; | |
1866 | ||
1867 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
315cb0ad | 1868 | if (!shost) { |
1d9bf13a MC |
1869 | printk(KERN_ERR "set_host_param could not find host no %u\n", |
1870 | ev->u.set_host_param.host_no); | |
1871 | return -ENODEV; | |
1872 | } | |
1873 | ||
1874 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1875 | data, ev->u.set_host_param.len); | |
1876 | scsi_host_put(shost); | |
1877 | return err; | |
1878 | } | |
1879 | ||
0896b752 | 1880 | static int |
43514774 MC |
1881 | iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
1882 | { | |
1883 | struct Scsi_Host *shost; | |
1884 | struct iscsi_path *params; | |
1885 | int err; | |
1886 | ||
1887 | if (!transport->set_path) | |
1888 | return -ENOSYS; | |
1889 | ||
1890 | shost = scsi_host_lookup(ev->u.set_path.host_no); | |
1891 | if (!shost) { | |
1892 | printk(KERN_ERR "set path could not find host no %u\n", | |
1893 | ev->u.set_path.host_no); | |
1894 | return -ENODEV; | |
1895 | } | |
1896 | ||
1897 | params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); | |
1898 | err = transport->set_path(shost, params); | |
1899 | ||
1900 | scsi_host_put(shost); | |
1901 | return err; | |
1902 | } | |
1903 | ||
56c155b5 MC |
1904 | static int |
1905 | iscsi_set_iface_params(struct iscsi_transport *transport, | |
1906 | struct iscsi_uevent *ev) | |
1907 | { | |
1908 | char *data = (char *)ev + sizeof(*ev); | |
1909 | struct Scsi_Host *shost; | |
1910 | int err; | |
1911 | ||
1912 | if (!transport->set_iface_param) | |
1913 | return -ENOSYS; | |
1914 | ||
1915 | shost = scsi_host_lookup(ev->u.set_iface_params.host_no); | |
1916 | if (!shost) { | |
1917 | printk(KERN_ERR "set_iface_params could not find host no %u\n", | |
1918 | ev->u.set_iface_params.host_no); | |
1919 | return -ENODEV; | |
1920 | } | |
1921 | ||
1922 | err = transport->set_iface_param(shost, data, | |
1923 | ev->u.set_iface_params.count); | |
1924 | scsi_host_put(shost); | |
1925 | return err; | |
1926 | } | |
1927 | ||
43514774 MC |
1928 | static int |
1929 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) | |
0896b752 AA |
1930 | { |
1931 | int err = 0; | |
1932 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1933 | struct iscsi_transport *transport = NULL; | |
1934 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1935 | struct iscsi_cls_session *session; |
1936 | struct iscsi_cls_conn *conn; | |
d82ff9be | 1937 | struct iscsi_endpoint *ep = NULL; |
0896b752 | 1938 | |
43514774 MC |
1939 | if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) |
1940 | *group = ISCSI_NL_GRP_UIP; | |
1941 | else | |
1942 | *group = ISCSI_NL_GRP_ISCSID; | |
1943 | ||
0896b752 AA |
1944 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1945 | if (!priv) | |
1946 | return -EINVAL; | |
1947 | transport = priv->iscsi_transport; | |
1948 | ||
7b7232f3 MC |
1949 | if (!try_module_get(transport->owner)) |
1950 | return -EINVAL; | |
1951 | ||
0896b752 AA |
1952 | switch (nlh->nlmsg_type) { |
1953 | case ISCSI_UEVENT_CREATE_SESSION: | |
d82ff9be | 1954 | err = iscsi_if_create_session(priv, ep, ev, |
40753caa MC |
1955 | ev->u.c_session.initial_cmdsn, |
1956 | ev->u.c_session.cmds_max, | |
1957 | ev->u.c_session.queue_depth); | |
1958 | break; | |
1959 | case ISCSI_UEVENT_CREATE_BOUND_SESSION: | |
d82ff9be | 1960 | ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); |
c95fddc7 MC |
1961 | if (!ep) { |
1962 | err = -EINVAL; | |
1963 | break; | |
1964 | } | |
d82ff9be MC |
1965 | |
1966 | err = iscsi_if_create_session(priv, ep, ev, | |
40753caa MC |
1967 | ev->u.c_bound_session.initial_cmdsn, |
1968 | ev->u.c_bound_session.cmds_max, | |
1969 | ev->u.c_bound_session.queue_depth); | |
0896b752 AA |
1970 | break; |
1971 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1972 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1973 | if (session) |
7b7232f3 | 1974 | transport->destroy_session(session); |
26974789 MC |
1975 | else |
1976 | err = -EINVAL; | |
1977 | break; | |
1978 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1979 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1980 | if (session) | |
06d25af4 MC |
1981 | scsi_queue_work(iscsi_session_to_shost(session), |
1982 | &session->unbind_work); | |
26974789 | 1983 | else |
7b7232f3 | 1984 | err = -EINVAL; |
0896b752 AA |
1985 | break; |
1986 | case ISCSI_UEVENT_CREATE_CONN: | |
1987 | err = iscsi_if_create_conn(transport, ev); | |
1988 | break; | |
1989 | case ISCSI_UEVENT_DESTROY_CONN: | |
1990 | err = iscsi_if_destroy_conn(transport, ev); | |
1991 | break; | |
1992 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1993 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1994 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 | 1995 | |
22a39fbb MC |
1996 | if (conn && conn->ep) |
1997 | iscsi_if_ep_disconnect(transport, conn->ep->id); | |
1998 | ||
1999 | if (!session || !conn) { | |
7b7232f3 | 2000 | err = -EINVAL; |
22a39fbb MC |
2001 | break; |
2002 | } | |
2003 | ||
2004 | ev->r.retcode = transport->bind_conn(session, conn, | |
2005 | ev->u.b_conn.transport_eph, | |
2006 | ev->u.b_conn.is_leading); | |
2007 | if (ev->r.retcode || !transport->ep_connect) | |
2008 | break; | |
2009 | ||
2010 | ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); | |
2011 | if (ep) { | |
2012 | ep->conn = conn; | |
2013 | ||
2014 | mutex_lock(&conn->ep_mutex); | |
2015 | conn->ep = ep; | |
2016 | mutex_unlock(&conn->ep_mutex); | |
2017 | } else | |
2018 | iscsi_cls_conn_printk(KERN_ERR, conn, | |
2019 | "Could not set ep conn " | |
2020 | "binding\n"); | |
0896b752 AA |
2021 | break; |
2022 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 2023 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
2024 | break; |
2025 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 2026 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
2027 | if (conn) |
2028 | ev->r.retcode = transport->start_conn(conn); | |
2029 | else | |
2030 | err = -EINVAL; | |
0896b752 AA |
2031 | break; |
2032 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 2033 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
2034 | if (conn) |
2035 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
2036 | else | |
2037 | err = -EINVAL; | |
0896b752 AA |
2038 | break; |
2039 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 2040 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
2041 | if (conn) |
2042 | ev->r.retcode = transport->send_pdu(conn, | |
2043 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
2044 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
2045 | ev->u.send_pdu.data_size); | |
2046 | else | |
2047 | err = -EINVAL; | |
0896b752 AA |
2048 | break; |
2049 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 2050 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 2051 | break; |
264faaaa OG |
2052 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
2053 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
2054 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
10eb0f01 | 2055 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: |
264faaaa OG |
2056 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); |
2057 | break; | |
01cb225d MC |
2058 | case ISCSI_UEVENT_TGT_DSCVR: |
2059 | err = iscsi_tgt_dscvr(transport, ev); | |
2060 | break; | |
1d9bf13a MC |
2061 | case ISCSI_UEVENT_SET_HOST_PARAM: |
2062 | err = iscsi_set_host_param(transport, ev); | |
2063 | break; | |
43514774 MC |
2064 | case ISCSI_UEVENT_PATH_UPDATE: |
2065 | err = iscsi_set_path(transport, ev); | |
2066 | break; | |
56c155b5 MC |
2067 | case ISCSI_UEVENT_SET_IFACE_PARAMS: |
2068 | err = iscsi_set_iface_params(transport, ev); | |
2069 | break; | |
0896b752 | 2070 | default: |
1d9bf13a | 2071 | err = -ENOSYS; |
0896b752 AA |
2072 | break; |
2073 | } | |
2074 | ||
7b7232f3 | 2075 | module_put(transport->owner); |
0896b752 AA |
2076 | return err; |
2077 | } | |
2078 | ||
b5c7a12d | 2079 | /* |
cd40b7d3 DL |
2080 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
2081 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 2082 | */ |
0896b752 | 2083 | static void |
cd40b7d3 | 2084 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 2085 | { |
0b950672 | 2086 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
2087 | while (skb->len >= NLMSG_SPACE(0)) { |
2088 | int err; | |
2089 | uint32_t rlen; | |
2090 | struct nlmsghdr *nlh; | |
2091 | struct iscsi_uevent *ev; | |
43514774 | 2092 | uint32_t group; |
cd40b7d3 DL |
2093 | |
2094 | nlh = nlmsg_hdr(skb); | |
2095 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
2096 | skb->len < nlh->nlmsg_len) { | |
2097 | break; | |
ee7f8e40 | 2098 | } |
ee7f8e40 | 2099 | |
cd40b7d3 DL |
2100 | ev = NLMSG_DATA(nlh); |
2101 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
2102 | if (rlen > skb->len) | |
2103 | rlen = skb->len; | |
0896b752 | 2104 | |
43514774 | 2105 | err = iscsi_if_recv_msg(skb, nlh, &group); |
cd40b7d3 DL |
2106 | if (err) { |
2107 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
2108 | ev->iferror = err; | |
0896b752 | 2109 | } |
cd40b7d3 DL |
2110 | do { |
2111 | /* | |
2112 | * special case for GET_STATS: | |
2113 | * on success - sending reply and stats from | |
2114 | * inside of if_recv_msg(), | |
2115 | * on error - fall through. | |
2116 | */ | |
2117 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
2118 | break; | |
43514774 | 2119 | err = iscsi_if_send_reply(group, nlh->nlmsg_seq, |
cd40b7d3 DL |
2120 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); |
2121 | } while (err < 0 && err != -ECONNREFUSED); | |
2122 | skb_pull(skb, rlen); | |
0896b752 | 2123 | } |
0b950672 | 2124 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 2125 | } |
1da177e4 | 2126 | |
fd7255f5 | 2127 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
ee959b00 | 2128 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
fd7255f5 MC |
2129 | __ATTR(_name,_mode,_show,_store) |
2130 | ||
1da177e4 | 2131 | /* |
0896b752 | 2132 | * iSCSI connection attrs |
1da177e4 | 2133 | */ |
a54a52ca | 2134 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 2135 | static ssize_t \ |
ee959b00 TJ |
2136 | show_conn_param_##param(struct device *dev, \ |
2137 | struct device_attribute *attr, char *buf) \ | |
0896b752 | 2138 | { \ |
ee959b00 | 2139 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ |
7b8631b5 | 2140 | struct iscsi_transport *t = conn->transport; \ |
a54a52ca | 2141 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
2142 | } |
2143 | ||
a54a52ca MC |
2144 | #define iscsi_conn_attr(field, param) \ |
2145 | iscsi_conn_attr_show(param) \ | |
2146 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 2147 | NULL); |
0896b752 | 2148 | |
a54a52ca MC |
2149 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
2150 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
2151 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
2152 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
2153 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
2154 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
2155 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
a54a52ca MC |
2156 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); |
2157 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
f6d5180c MC |
2158 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
2159 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 | 2160 | |
289324b0 MC |
2161 | #define iscsi_conn_ep_attr_show(param) \ |
2162 | static ssize_t show_conn_ep_param_##param(struct device *dev, \ | |
2163 | struct device_attribute *attr,\ | |
2164 | char *buf) \ | |
2165 | { \ | |
2166 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ | |
2167 | struct iscsi_transport *t = conn->transport; \ | |
2168 | struct iscsi_endpoint *ep; \ | |
2169 | ssize_t rc; \ | |
2170 | \ | |
2171 | /* \ | |
2172 | * Need to make sure ep_disconnect does not free the LLD's \ | |
2173 | * interconnect resources while we are trying to read them. \ | |
2174 | */ \ | |
2175 | mutex_lock(&conn->ep_mutex); \ | |
2176 | ep = conn->ep; \ | |
2177 | if (!ep && t->ep_connect) { \ | |
2178 | mutex_unlock(&conn->ep_mutex); \ | |
2179 | return -ENOTCONN; \ | |
2180 | } \ | |
2181 | \ | |
2182 | if (ep) \ | |
2183 | rc = t->get_ep_param(ep, param, buf); \ | |
2184 | else \ | |
2185 | rc = t->get_conn_param(conn, param, buf); \ | |
2186 | mutex_unlock(&conn->ep_mutex); \ | |
2187 | return rc; \ | |
2188 | } | |
2189 | ||
2190 | #define iscsi_conn_ep_attr(field, param) \ | |
2191 | iscsi_conn_ep_attr_show(param) \ | |
2192 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ | |
2193 | show_conn_ep_param_##param, NULL); | |
2194 | ||
2195 | iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
2196 | iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); | |
2197 | ||
3128c6c7 MC |
2198 | static struct attribute *iscsi_conn_attrs[] = { |
2199 | &dev_attr_conn_max_recv_dlength.attr, | |
2200 | &dev_attr_conn_max_xmit_dlength.attr, | |
2201 | &dev_attr_conn_header_digest.attr, | |
2202 | &dev_attr_conn_data_digest.attr, | |
2203 | &dev_attr_conn_ifmarker.attr, | |
2204 | &dev_attr_conn_ofmarker.attr, | |
2205 | &dev_attr_conn_address.attr, | |
2206 | &dev_attr_conn_port.attr, | |
2207 | &dev_attr_conn_exp_statsn.attr, | |
2208 | &dev_attr_conn_persistent_address.attr, | |
2209 | &dev_attr_conn_persistent_port.attr, | |
2210 | &dev_attr_conn_ping_tmo.attr, | |
2211 | &dev_attr_conn_recv_tmo.attr, | |
2212 | NULL, | |
2213 | }; | |
2214 | ||
2215 | static mode_t iscsi_conn_attr_is_visible(struct kobject *kobj, | |
2216 | struct attribute *attr, int i) | |
2217 | { | |
2218 | struct device *cdev = container_of(kobj, struct device, kobj); | |
2219 | struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); | |
2220 | struct iscsi_transport *t = conn->transport; | |
2221 | int param; | |
2222 | ||
2223 | if (attr == &dev_attr_conn_max_recv_dlength.attr) | |
2224 | param = ISCSI_PARAM_MAX_RECV_DLENGTH; | |
2225 | else if (attr == &dev_attr_conn_max_xmit_dlength.attr) | |
2226 | param = ISCSI_PARAM_MAX_XMIT_DLENGTH; | |
2227 | else if (attr == &dev_attr_conn_header_digest.attr) | |
2228 | param = ISCSI_PARAM_HDRDGST_EN; | |
2229 | else if (attr == &dev_attr_conn_data_digest.attr) | |
2230 | param = ISCSI_PARAM_DATADGST_EN; | |
2231 | else if (attr == &dev_attr_conn_ifmarker.attr) | |
2232 | param = ISCSI_PARAM_IFMARKER_EN; | |
2233 | else if (attr == &dev_attr_conn_ofmarker.attr) | |
2234 | param = ISCSI_PARAM_OFMARKER_EN; | |
2235 | else if (attr == &dev_attr_conn_address.attr) | |
2236 | param = ISCSI_PARAM_CONN_ADDRESS; | |
2237 | else if (attr == &dev_attr_conn_port.attr) | |
2238 | param = ISCSI_PARAM_CONN_PORT; | |
2239 | else if (attr == &dev_attr_conn_exp_statsn.attr) | |
2240 | param = ISCSI_PARAM_EXP_STATSN; | |
2241 | else if (attr == &dev_attr_conn_persistent_address.attr) | |
2242 | param = ISCSI_PARAM_PERSISTENT_ADDRESS; | |
2243 | else if (attr == &dev_attr_conn_persistent_port.attr) | |
2244 | param = ISCSI_PARAM_PERSISTENT_PORT; | |
2245 | else if (attr == &dev_attr_conn_ping_tmo.attr) | |
2246 | param = ISCSI_PARAM_PING_TMO; | |
2247 | else if (attr == &dev_attr_conn_recv_tmo.attr) | |
2248 | param = ISCSI_PARAM_RECV_TMO; | |
2249 | else { | |
2250 | WARN_ONCE(1, "Invalid conn attr"); | |
2251 | return 0; | |
2252 | } | |
2253 | ||
2254 | return t->attr_is_visible(ISCSI_PARAM, param); | |
2255 | } | |
2256 | ||
2257 | static struct attribute_group iscsi_conn_group = { | |
2258 | .attrs = iscsi_conn_attrs, | |
2259 | .is_visible = iscsi_conn_attr_is_visible, | |
2260 | }; | |
2261 | ||
1da177e4 | 2262 | /* |
0896b752 | 2263 | * iSCSI session attrs |
1da177e4 | 2264 | */ |
b2c64167 | 2265 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 2266 | static ssize_t \ |
ee959b00 TJ |
2267 | show_session_param_##param(struct device *dev, \ |
2268 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 2269 | { \ |
ee959b00 TJ |
2270 | struct iscsi_cls_session *session = \ |
2271 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 | 2272 | struct iscsi_transport *t = session->transport; \ |
b2c64167 MC |
2273 | \ |
2274 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
2275 | return -EACCES; \ | |
a54a52ca | 2276 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
2277 | } |
2278 | ||
b2c64167 MC |
2279 | #define iscsi_session_attr(field, param, perm) \ |
2280 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 2281 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 | 2282 | NULL); |
b2c64167 MC |
2283 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
2284 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
2285 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
2286 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
2287 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
2288 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
2289 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
2290 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
2291 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
2292 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
2293 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
2294 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
2295 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
2296 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
2297 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
2298 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
2299 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
3fe5ae8b | 2300 | iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); |
88dfd340 | 2301 | iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); |
3b2bef1f VC |
2302 | iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); |
2303 | iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); | |
1da177e4 | 2304 | |
6eabafbe | 2305 | static ssize_t |
ee959b00 TJ |
2306 | show_priv_session_state(struct device *dev, struct device_attribute *attr, |
2307 | char *buf) | |
6eabafbe | 2308 | { |
ee959b00 | 2309 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); |
6eabafbe MC |
2310 | return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); |
2311 | } | |
2312 | static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, | |
2313 | NULL); | |
2314 | ||
fd7255f5 MC |
2315 | #define iscsi_priv_session_attr_show(field, format) \ |
2316 | static ssize_t \ | |
ee959b00 TJ |
2317 | show_priv_session_##field(struct device *dev, \ |
2318 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 2319 | { \ |
ee959b00 TJ |
2320 | struct iscsi_cls_session *session = \ |
2321 | iscsi_dev_to_session(dev->parent); \ | |
fe4f0bde VC |
2322 | if (session->field == -1) \ |
2323 | return sprintf(buf, "off\n"); \ | |
fd7255f5 MC |
2324 | return sprintf(buf, format"\n", session->field); \ |
2325 | } | |
2326 | ||
fe4f0bde VC |
2327 | #define iscsi_priv_session_attr_store(field) \ |
2328 | static ssize_t \ | |
2329 | store_priv_session_##field(struct device *dev, \ | |
2330 | struct device_attribute *attr, \ | |
2331 | const char *buf, size_t count) \ | |
2332 | { \ | |
2333 | int val; \ | |
2334 | char *cp; \ | |
2335 | struct iscsi_cls_session *session = \ | |
2336 | iscsi_dev_to_session(dev->parent); \ | |
2337 | if ((session->state == ISCSI_SESSION_FREE) || \ | |
2338 | (session->state == ISCSI_SESSION_FAILED)) \ | |
2339 | return -EBUSY; \ | |
2340 | if (strncmp(buf, "off", 3) == 0) \ | |
2341 | session->field = -1; \ | |
2342 | else { \ | |
2343 | val = simple_strtoul(buf, &cp, 0); \ | |
2344 | if (*cp != '\0' && *cp != '\n') \ | |
2345 | return -EINVAL; \ | |
2346 | session->field = val; \ | |
2347 | } \ | |
2348 | return count; \ | |
2349 | } | |
2350 | ||
2351 | #define iscsi_priv_session_rw_attr(field, format) \ | |
fd7255f5 | 2352 | iscsi_priv_session_attr_show(field, format) \ |
fe4f0bde | 2353 | iscsi_priv_session_attr_store(field) \ |
523f3c80 | 2354 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ |
fe4f0bde VC |
2355 | show_priv_session_##field, \ |
2356 | store_priv_session_##field) | |
2357 | iscsi_priv_session_rw_attr(recovery_tmo, "%d"); | |
fd7255f5 | 2358 | |
1d063c17 MC |
2359 | static struct attribute *iscsi_session_attrs[] = { |
2360 | &dev_attr_sess_initial_r2t.attr, | |
2361 | &dev_attr_sess_max_outstanding_r2t.attr, | |
2362 | &dev_attr_sess_immediate_data.attr, | |
2363 | &dev_attr_sess_first_burst_len.attr, | |
2364 | &dev_attr_sess_max_burst_len.attr, | |
2365 | &dev_attr_sess_data_pdu_in_order.attr, | |
2366 | &dev_attr_sess_data_seq_in_order.attr, | |
2367 | &dev_attr_sess_erl.attr, | |
2368 | &dev_attr_sess_targetname.attr, | |
2369 | &dev_attr_sess_tpgt.attr, | |
2370 | &dev_attr_sess_password.attr, | |
2371 | &dev_attr_sess_password_in.attr, | |
2372 | &dev_attr_sess_username.attr, | |
2373 | &dev_attr_sess_username_in.attr, | |
2374 | &dev_attr_sess_fast_abort.attr, | |
2375 | &dev_attr_sess_abort_tmo.attr, | |
2376 | &dev_attr_sess_lu_reset_tmo.attr, | |
2377 | &dev_attr_sess_tgt_reset_tmo.attr, | |
2378 | &dev_attr_sess_ifacename.attr, | |
2379 | &dev_attr_sess_initiatorname.attr, | |
2380 | &dev_attr_sess_targetalias.attr, | |
2381 | &dev_attr_priv_sess_recovery_tmo.attr, | |
2382 | &dev_attr_priv_sess_state.attr, | |
2383 | NULL, | |
2384 | }; | |
2385 | ||
2386 | static mode_t iscsi_session_attr_is_visible(struct kobject *kobj, | |
2387 | struct attribute *attr, int i) | |
2388 | { | |
2389 | struct device *cdev = container_of(kobj, struct device, kobj); | |
2390 | struct iscsi_cls_session *session = transport_class_to_session(cdev); | |
2391 | struct iscsi_transport *t = session->transport; | |
2392 | int param; | |
2393 | ||
2394 | if (attr == &dev_attr_sess_initial_r2t.attr) | |
2395 | param = ISCSI_PARAM_INITIAL_R2T_EN; | |
2396 | else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) | |
2397 | param = ISCSI_PARAM_MAX_R2T; | |
2398 | else if (attr == &dev_attr_sess_immediate_data.attr) | |
2399 | param = ISCSI_PARAM_IMM_DATA_EN; | |
2400 | else if (attr == &dev_attr_sess_first_burst_len.attr) | |
2401 | param = ISCSI_PARAM_FIRST_BURST; | |
2402 | else if (attr == &dev_attr_sess_max_burst_len.attr) | |
2403 | param = ISCSI_PARAM_MAX_BURST; | |
2404 | else if (attr == &dev_attr_sess_data_pdu_in_order.attr) | |
2405 | param = ISCSI_PARAM_PDU_INORDER_EN; | |
2406 | else if (attr == &dev_attr_sess_data_seq_in_order.attr) | |
2407 | param = ISCSI_PARAM_DATASEQ_INORDER_EN; | |
2408 | else if (attr == &dev_attr_sess_erl.attr) | |
2409 | param = ISCSI_PARAM_ERL; | |
2410 | else if (attr == &dev_attr_sess_targetname.attr) | |
2411 | param = ISCSI_PARAM_TARGET_NAME; | |
2412 | else if (attr == &dev_attr_sess_tpgt.attr) | |
2413 | param = ISCSI_PARAM_TPGT; | |
2414 | else if (attr == &dev_attr_sess_password.attr) | |
2415 | param = ISCSI_PARAM_USERNAME; | |
2416 | else if (attr == &dev_attr_sess_password_in.attr) | |
2417 | param = ISCSI_PARAM_USERNAME_IN; | |
2418 | else if (attr == &dev_attr_sess_username.attr) | |
2419 | param = ISCSI_PARAM_PASSWORD; | |
2420 | else if (attr == &dev_attr_sess_username_in.attr) | |
2421 | param = ISCSI_PARAM_PASSWORD_IN; | |
2422 | else if (attr == &dev_attr_sess_fast_abort.attr) | |
2423 | param = ISCSI_PARAM_FAST_ABORT; | |
2424 | else if (attr == &dev_attr_sess_abort_tmo.attr) | |
2425 | param = ISCSI_PARAM_ABORT_TMO; | |
2426 | else if (attr == &dev_attr_sess_lu_reset_tmo.attr) | |
2427 | param = ISCSI_PARAM_LU_RESET_TMO; | |
2428 | else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) | |
2429 | param = ISCSI_PARAM_TGT_RESET_TMO; | |
2430 | else if (attr == &dev_attr_sess_ifacename.attr) | |
2431 | param = ISCSI_PARAM_IFACE_NAME; | |
2432 | else if (attr == &dev_attr_sess_initiatorname.attr) | |
2433 | param = ISCSI_PARAM_INITIATOR_NAME; | |
2434 | else if (attr == &dev_attr_sess_targetalias.attr) | |
2435 | param = ISCSI_PARAM_TARGET_ALIAS; | |
2436 | else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) | |
2437 | return S_IRUGO | S_IWUSR; | |
2438 | else if (attr == &dev_attr_priv_sess_state.attr) | |
2439 | return S_IRUGO; | |
2440 | else { | |
2441 | WARN_ONCE(1, "Invalid session attr"); | |
2442 | return 0; | |
2443 | } | |
2444 | ||
2445 | return t->attr_is_visible(ISCSI_PARAM, param); | |
2446 | } | |
2447 | ||
2448 | static struct attribute_group iscsi_session_group = { | |
2449 | .attrs = iscsi_session_attrs, | |
2450 | .is_visible = iscsi_session_attr_is_visible, | |
2451 | }; | |
2452 | ||
1819dc81 MC |
2453 | /* |
2454 | * iSCSI host attrs | |
2455 | */ | |
2456 | #define iscsi_host_attr_show(param) \ | |
2457 | static ssize_t \ | |
ee959b00 TJ |
2458 | show_host_param_##param(struct device *dev, \ |
2459 | struct device_attribute *attr, char *buf) \ | |
1819dc81 | 2460 | { \ |
ee959b00 | 2461 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1819dc81 MC |
2462 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ |
2463 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
2464 | } | |
2465 | ||
2466 | #define iscsi_host_attr(field, param) \ | |
2467 | iscsi_host_attr_show(param) \ | |
2468 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
2469 | NULL); | |
2470 | ||
d8196ed2 | 2471 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 2472 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 2473 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 2474 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 2475 | |
f27fb2ef MC |
2476 | static struct attribute *iscsi_host_attrs[] = { |
2477 | &dev_attr_host_netdev.attr, | |
2478 | &dev_attr_host_hwaddress.attr, | |
2479 | &dev_attr_host_ipaddress.attr, | |
2480 | &dev_attr_host_initiatorname.attr, | |
2481 | NULL, | |
2482 | }; | |
2483 | ||
2484 | static mode_t iscsi_host_attr_is_visible(struct kobject *kobj, | |
2485 | struct attribute *attr, int i) | |
2486 | { | |
2487 | struct device *cdev = container_of(kobj, struct device, kobj); | |
2488 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
2489 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); | |
2490 | int param; | |
2491 | ||
2492 | if (attr == &dev_attr_host_netdev.attr) | |
2493 | param = ISCSI_HOST_PARAM_NETDEV_NAME; | |
2494 | else if (attr == &dev_attr_host_hwaddress.attr) | |
2495 | param = ISCSI_HOST_PARAM_HWADDRESS; | |
2496 | else if (attr == &dev_attr_host_ipaddress.attr) | |
2497 | param = ISCSI_HOST_PARAM_IPADDRESS; | |
2498 | else if (attr == &dev_attr_host_initiatorname.attr) | |
2499 | param = ISCSI_HOST_PARAM_INITIATOR_NAME; | |
2500 | else { | |
2501 | WARN_ONCE(1, "Invalid host attr"); | |
2502 | return 0; | |
2503 | } | |
2504 | ||
2505 | return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); | |
2506 | } | |
2507 | ||
2508 | static struct attribute_group iscsi_host_group = { | |
2509 | .attrs = iscsi_host_attrs, | |
2510 | .is_visible = iscsi_host_attr_is_visible, | |
2511 | }; | |
1819dc81 | 2512 | |
0896b752 AA |
2513 | static int iscsi_session_match(struct attribute_container *cont, |
2514 | struct device *dev) | |
1da177e4 | 2515 | { |
7b8631b5 | 2516 | struct iscsi_cls_session *session; |
1da177e4 | 2517 | struct Scsi_Host *shost; |
0896b752 AA |
2518 | struct iscsi_internal *priv; |
2519 | ||
2520 | if (!iscsi_is_session_dev(dev)) | |
2521 | return 0; | |
1da177e4 | 2522 | |
7b8631b5 MC |
2523 | session = iscsi_dev_to_session(dev); |
2524 | shost = iscsi_session_to_shost(session); | |
0896b752 | 2525 | if (!shost->transportt) |
1da177e4 LT |
2526 | return 0; |
2527 | ||
0896b752 AA |
2528 | priv = to_iscsi_internal(shost->transportt); |
2529 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
2530 | return 0; |
2531 | ||
0896b752 | 2532 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
2533 | } |
2534 | ||
0896b752 AA |
2535 | static int iscsi_conn_match(struct attribute_container *cont, |
2536 | struct device *dev) | |
2537 | { | |
7b8631b5 MC |
2538 | struct iscsi_cls_session *session; |
2539 | struct iscsi_cls_conn *conn; | |
1da177e4 | 2540 | struct Scsi_Host *shost; |
0896b752 | 2541 | struct iscsi_internal *priv; |
1da177e4 | 2542 | |
0896b752 | 2543 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
2544 | return 0; |
2545 | ||
7b8631b5 MC |
2546 | conn = iscsi_dev_to_conn(dev); |
2547 | session = iscsi_dev_to_session(conn->dev.parent); | |
2548 | shost = iscsi_session_to_shost(session); | |
2549 | ||
0896b752 | 2550 | if (!shost->transportt) |
1da177e4 LT |
2551 | return 0; |
2552 | ||
0896b752 AA |
2553 | priv = to_iscsi_internal(shost->transportt); |
2554 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
2555 | return 0; | |
1da177e4 | 2556 | |
0896b752 AA |
2557 | return &priv->conn_cont.ac == cont; |
2558 | } | |
2559 | ||
30a6c652 MC |
2560 | static int iscsi_host_match(struct attribute_container *cont, |
2561 | struct device *dev) | |
2562 | { | |
2563 | struct Scsi_Host *shost; | |
2564 | struct iscsi_internal *priv; | |
2565 | ||
2566 | if (!scsi_is_host_device(dev)) | |
2567 | return 0; | |
2568 | ||
2569 | shost = dev_to_shost(dev); | |
2570 | if (!shost->transportt || | |
2571 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
2572 | return 0; | |
2573 | ||
2574 | priv = to_iscsi_internal(shost->transportt); | |
2575 | return &priv->t.host_attrs.ac == cont; | |
2576 | } | |
2577 | ||
7b8631b5 MC |
2578 | struct scsi_transport_template * |
2579 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
2580 | { |
2581 | struct iscsi_internal *priv; | |
2582 | unsigned long flags; | |
f27fb2ef | 2583 | int err; |
0896b752 AA |
2584 | |
2585 | BUG_ON(!tt); | |
2586 | ||
2587 | priv = iscsi_if_transport_lookup(tt); | |
2588 | if (priv) | |
7b8631b5 | 2589 | return NULL; |
0896b752 | 2590 | |
24669f75 | 2591 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 2592 | if (!priv) |
7b8631b5 | 2593 | return NULL; |
0896b752 | 2594 | INIT_LIST_HEAD(&priv->list); |
0896b752 | 2595 | priv->iscsi_transport = tt; |
30a6c652 | 2596 | priv->t.user_scan = iscsi_user_scan; |
06d25af4 | 2597 | priv->t.create_work_queue = 1; |
0896b752 | 2598 | |
ee959b00 | 2599 | priv->dev.class = &iscsi_transport_class; |
71610f55 | 2600 | dev_set_name(&priv->dev, "%s", tt->name); |
ee959b00 | 2601 | err = device_register(&priv->dev); |
0896b752 AA |
2602 | if (err) |
2603 | goto free_priv; | |
2604 | ||
ee959b00 | 2605 | err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); |
0896b752 | 2606 | if (err) |
ee959b00 | 2607 | goto unregister_dev; |
0896b752 | 2608 | |
30a6c652 | 2609 | /* host parameters */ |
30a6c652 MC |
2610 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; |
2611 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
f27fb2ef | 2612 | priv->t.host_attrs.ac.grp = &iscsi_host_group; |
32c6e1b9 | 2613 | priv->t.host_size = sizeof(struct iscsi_cls_host); |
30a6c652 MC |
2614 | transport_container_register(&priv->t.host_attrs); |
2615 | ||
0896b752 | 2616 | /* connection parameters */ |
0896b752 AA |
2617 | priv->conn_cont.ac.class = &iscsi_connection_class.class; |
2618 | priv->conn_cont.ac.match = iscsi_conn_match; | |
3128c6c7 | 2619 | priv->conn_cont.ac.grp = &iscsi_conn_group; |
0896b752 | 2620 | transport_container_register(&priv->conn_cont); |
1da177e4 | 2621 | |
0896b752 | 2622 | /* session parameters */ |
0896b752 AA |
2623 | priv->session_cont.ac.class = &iscsi_session_class.class; |
2624 | priv->session_cont.ac.match = iscsi_session_match; | |
1d063c17 | 2625 | priv->session_cont.ac.grp = &iscsi_session_group; |
0896b752 AA |
2626 | transport_container_register(&priv->session_cont); |
2627 | ||
0896b752 AA |
2628 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
2629 | list_add(&priv->list, &iscsi_transports); | |
2630 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
2631 | ||
2632 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 2633 | return &priv->t; |
1da177e4 | 2634 | |
ee959b00 TJ |
2635 | unregister_dev: |
2636 | device_unregister(&priv->dev); | |
d82ff9be | 2637 | return NULL; |
0896b752 AA |
2638 | free_priv: |
2639 | kfree(priv); | |
7b8631b5 | 2640 | return NULL; |
1da177e4 | 2641 | } |
0896b752 AA |
2642 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
2643 | ||
2644 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
2645 | { | |
2646 | struct iscsi_internal *priv; | |
2647 | unsigned long flags; | |
2648 | ||
2649 | BUG_ON(!tt); | |
2650 | ||
0b950672 | 2651 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
2652 | |
2653 | priv = iscsi_if_transport_lookup(tt); | |
2654 | BUG_ON (!priv); | |
2655 | ||
0896b752 AA |
2656 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
2657 | list_del(&priv->list); | |
2658 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
2659 | ||
2660 | transport_container_unregister(&priv->conn_cont); | |
2661 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 2662 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 | 2663 | |
ee959b00 TJ |
2664 | sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); |
2665 | device_unregister(&priv->dev); | |
0b950672 | 2666 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 2667 | |
0896b752 AA |
2668 | return 0; |
2669 | } | |
2670 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 2671 | |
1da177e4 LT |
2672 | static __init int iscsi_transport_init(void) |
2673 | { | |
0896b752 | 2674 | int err; |
1da177e4 | 2675 | |
09492605 | 2676 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
2677 | ISCSI_TRANSPORT_VERSION); |
2678 | ||
41be1444 MC |
2679 | atomic_set(&iscsi_session_nr, 0); |
2680 | ||
0896b752 | 2681 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
2682 | if (err) |
2683 | return err; | |
0896b752 | 2684 | |
d82ff9be | 2685 | err = class_register(&iscsi_endpoint_class); |
0896b752 AA |
2686 | if (err) |
2687 | goto unregister_transport_class; | |
2688 | ||
8d07913d | 2689 | err = class_register(&iscsi_iface_class); |
d82ff9be MC |
2690 | if (err) |
2691 | goto unregister_endpoint_class; | |
2692 | ||
8d07913d MC |
2693 | err = transport_class_register(&iscsi_host_class); |
2694 | if (err) | |
2695 | goto unregister_iface_class; | |
2696 | ||
30a6c652 MC |
2697 | err = transport_class_register(&iscsi_connection_class); |
2698 | if (err) | |
2699 | goto unregister_host_class; | |
2700 | ||
0896b752 AA |
2701 | err = transport_class_register(&iscsi_session_class); |
2702 | if (err) | |
2703 | goto unregister_conn_class; | |
2704 | ||
d82ff9be MC |
2705 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, |
2706 | NULL, THIS_MODULE); | |
0896b752 AA |
2707 | if (!nls) { |
2708 | err = -ENOBUFS; | |
43a145a3 | 2709 | goto unregister_session_class; |
0896b752 AA |
2710 | } |
2711 | ||
d8bf541e MC |
2712 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
2713 | if (!iscsi_eh_timer_workq) | |
2714 | goto release_nls; | |
2715 | ||
43a145a3 | 2716 | return 0; |
0896b752 | 2717 | |
d8bf541e | 2718 | release_nls: |
b7c6ba6e | 2719 | netlink_kernel_release(nls); |
0896b752 AA |
2720 | unregister_session_class: |
2721 | transport_class_unregister(&iscsi_session_class); | |
2722 | unregister_conn_class: | |
2723 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
2724 | unregister_host_class: |
2725 | transport_class_unregister(&iscsi_host_class); | |
8d07913d MC |
2726 | unregister_iface_class: |
2727 | class_unregister(&iscsi_iface_class); | |
d82ff9be MC |
2728 | unregister_endpoint_class: |
2729 | class_unregister(&iscsi_endpoint_class); | |
0896b752 AA |
2730 | unregister_transport_class: |
2731 | class_unregister(&iscsi_transport_class); | |
2732 | return err; | |
1da177e4 LT |
2733 | } |
2734 | ||
2735 | static void __exit iscsi_transport_exit(void) | |
2736 | { | |
d8bf541e | 2737 | destroy_workqueue(iscsi_eh_timer_workq); |
b7c6ba6e | 2738 | netlink_kernel_release(nls); |
0896b752 AA |
2739 | transport_class_unregister(&iscsi_connection_class); |
2740 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 2741 | transport_class_unregister(&iscsi_host_class); |
d82ff9be | 2742 | class_unregister(&iscsi_endpoint_class); |
8d07913d | 2743 | class_unregister(&iscsi_iface_class); |
0896b752 | 2744 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
2745 | } |
2746 | ||
2747 | module_init(iscsi_transport_init); | |
2748 | module_exit(iscsi_transport_exit); | |
2749 | ||
0896b752 AA |
2750 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
2751 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
2752 | "Alex Aizman <itn780@yahoo.com>"); | |
2753 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 2754 | MODULE_LICENSE("GPL"); |
f4246b33 | 2755 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |
058548ae | 2756 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); |