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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> |
8d4a690c | 27 | #include <linux/idr.h> |
0896b752 | 28 | #include <net/tcp.h> |
1da177e4 LT |
29 | #include <scsi/scsi.h> |
30 | #include <scsi/scsi_host.h> | |
31 | #include <scsi/scsi_device.h> | |
32 | #include <scsi/scsi_transport.h> | |
33 | #include <scsi/scsi_transport_iscsi.h> | |
0896b752 | 34 | #include <scsi/iscsi_if.h> |
c01be6dc | 35 | #include <scsi/scsi_cmnd.h> |
90eeb01a | 36 | #include <scsi/scsi_bsg_iscsi.h> |
1da177e4 | 37 | |
4c2133c8 | 38 | #define ISCSI_TRANSPORT_VERSION "2.0-870" |
1da177e4 | 39 | |
632248aa MC |
40 | static int dbg_session; |
41 | module_param_named(debug_session, dbg_session, int, | |
42 | S_IRUGO | S_IWUSR); | |
43 | MODULE_PARM_DESC(debug_session, | |
44 | "Turn on debugging for sessions in scsi_transport_iscsi " | |
45 | "module. Set to 1 to turn on, and zero to turn off. Default " | |
46 | "is off."); | |
47 | ||
48 | static int dbg_conn; | |
49 | module_param_named(debug_conn, dbg_conn, int, | |
50 | S_IRUGO | S_IWUSR); | |
51 | MODULE_PARM_DESC(debug_conn, | |
52 | "Turn on debugging for connections in scsi_transport_iscsi " | |
53 | "module. Set to 1 to turn on, and zero to turn off. Default " | |
54 | "is off."); | |
55 | ||
56 | #define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \ | |
57 | do { \ | |
58 | if (dbg_session) \ | |
59 | iscsi_cls_session_printk(KERN_INFO, _session, \ | |
60 | "%s: " dbg_fmt, \ | |
61 | __func__, ##arg); \ | |
62 | } while (0); | |
63 | ||
64 | #define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \ | |
65 | do { \ | |
66 | if (dbg_conn) \ | |
67 | iscsi_cls_conn_printk(KERN_INFO, _conn, \ | |
68 | "%s: " dbg_fmt, \ | |
69 | __func__, ##arg); \ | |
70 | } while (0); | |
71 | ||
1da177e4 LT |
72 | struct iscsi_internal { |
73 | struct scsi_transport_template t; | |
0896b752 AA |
74 | struct iscsi_transport *iscsi_transport; |
75 | struct list_head list; | |
ee959b00 | 76 | struct device dev; |
30a6c652 | 77 | |
0896b752 | 78 | struct transport_container conn_cont; |
0896b752 | 79 | struct transport_container session_cont; |
1da177e4 LT |
80 | }; |
81 | ||
41be1444 | 82 | static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ |
d8bf541e | 83 | static struct workqueue_struct *iscsi_eh_timer_workq; |
b5c7a12d | 84 | |
8d4a690c | 85 | static DEFINE_IDA(iscsi_sess_ida); |
0896b752 AA |
86 | /* |
87 | * list of registered transports and lock that must | |
88 | * be held while accessing list. The iscsi_transport_lock must | |
0b950672 | 89 | * be acquired after the rx_queue_mutex. |
0896b752 AA |
90 | */ |
91 | static LIST_HEAD(iscsi_transports); | |
92 | static DEFINE_SPINLOCK(iscsi_transport_lock); | |
93 | ||
94 | #define to_iscsi_internal(tmpl) \ | |
95 | container_of(tmpl, struct iscsi_internal, t) | |
96 | ||
ee959b00 TJ |
97 | #define dev_to_iscsi_internal(_dev) \ |
98 | container_of(_dev, struct iscsi_internal, dev) | |
0896b752 | 99 | |
ee959b00 | 100 | static void iscsi_transport_release(struct device *dev) |
0896b752 | 101 | { |
ee959b00 | 102 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
0896b752 AA |
103 | kfree(priv); |
104 | } | |
1da177e4 | 105 | |
0896b752 AA |
106 | /* |
107 | * iscsi_transport_class represents the iscsi_transports that are | |
108 | * registered. | |
109 | */ | |
110 | static struct class iscsi_transport_class = { | |
111 | .name = "iscsi_transport", | |
ee959b00 | 112 | .dev_release = iscsi_transport_release, |
0896b752 AA |
113 | }; |
114 | ||
115 | static ssize_t | |
ee959b00 TJ |
116 | show_transport_handle(struct device *dev, struct device_attribute *attr, |
117 | char *buf) | |
0896b752 | 118 | { |
ee959b00 | 119 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); |
762e2bfa | 120 | return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport)); |
0896b752 | 121 | } |
ee959b00 | 122 | static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL); |
0896b752 AA |
123 | |
124 | #define show_transport_attr(name, format) \ | |
125 | static ssize_t \ | |
ee959b00 TJ |
126 | show_transport_##name(struct device *dev, \ |
127 | struct device_attribute *attr,char *buf) \ | |
0896b752 | 128 | { \ |
ee959b00 | 129 | struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \ |
0896b752 AA |
130 | return sprintf(buf, format"\n", priv->iscsi_transport->name); \ |
131 | } \ | |
ee959b00 | 132 | static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL); |
0896b752 AA |
133 | |
134 | show_transport_attr(caps, "0x%x"); | |
0896b752 AA |
135 | |
136 | static struct attribute *iscsi_transport_attrs[] = { | |
ee959b00 TJ |
137 | &dev_attr_handle.attr, |
138 | &dev_attr_caps.attr, | |
0896b752 AA |
139 | NULL, |
140 | }; | |
141 | ||
142 | static struct attribute_group iscsi_transport_group = { | |
143 | .attrs = iscsi_transport_attrs, | |
144 | }; | |
145 | ||
d82ff9be MC |
146 | /* |
147 | * iSCSI endpoint attrs | |
148 | */ | |
149 | #define iscsi_dev_to_endpoint(_dev) \ | |
150 | container_of(_dev, struct iscsi_endpoint, dev) | |
151 | ||
152 | #define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \ | |
153 | struct device_attribute dev_attr_##_prefix##_##_name = \ | |
154 | __ATTR(_name,_mode,_show,_store) | |
155 | ||
156 | static void iscsi_endpoint_release(struct device *dev) | |
157 | { | |
158 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
159 | kfree(ep); | |
160 | } | |
161 | ||
162 | static struct class iscsi_endpoint_class = { | |
163 | .name = "iscsi_endpoint", | |
164 | .dev_release = iscsi_endpoint_release, | |
165 | }; | |
166 | ||
167 | static ssize_t | |
168 | show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf) | |
169 | { | |
170 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
21536062 | 171 | return sprintf(buf, "%llu\n", (unsigned long long) ep->id); |
d82ff9be MC |
172 | } |
173 | static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL); | |
174 | ||
175 | static struct attribute *iscsi_endpoint_attrs[] = { | |
176 | &dev_attr_ep_handle.attr, | |
177 | NULL, | |
178 | }; | |
179 | ||
180 | static struct attribute_group iscsi_endpoint_group = { | |
181 | .attrs = iscsi_endpoint_attrs, | |
182 | }; | |
183 | ||
184 | #define ISCSI_MAX_EPID -1 | |
185 | ||
186 | static int iscsi_match_epid(struct device *dev, void *data) | |
187 | { | |
188 | struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev); | |
21536062 | 189 | uint64_t *epid = (uint64_t *) data; |
d82ff9be MC |
190 | |
191 | return *epid == ep->id; | |
192 | } | |
193 | ||
194 | struct iscsi_endpoint * | |
195 | iscsi_create_endpoint(int dd_size) | |
196 | { | |
197 | struct device *dev; | |
198 | struct iscsi_endpoint *ep; | |
21536062 | 199 | uint64_t id; |
d82ff9be MC |
200 | int err; |
201 | ||
202 | for (id = 1; id < ISCSI_MAX_EPID; id++) { | |
695794ae | 203 | dev = class_find_device(&iscsi_endpoint_class, NULL, &id, |
d82ff9be MC |
204 | iscsi_match_epid); |
205 | if (!dev) | |
206 | break; | |
207 | } | |
208 | if (id == ISCSI_MAX_EPID) { | |
209 | printk(KERN_ERR "Too many connections. Max supported %u\n", | |
210 | ISCSI_MAX_EPID - 1); | |
211 | return NULL; | |
212 | } | |
213 | ||
214 | ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL); | |
215 | if (!ep) | |
216 | return NULL; | |
217 | ||
218 | ep->id = id; | |
219 | ep->dev.class = &iscsi_endpoint_class; | |
71610f55 | 220 | dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id); |
d82ff9be MC |
221 | err = device_register(&ep->dev); |
222 | if (err) | |
223 | goto free_ep; | |
224 | ||
225 | err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group); | |
226 | if (err) | |
227 | goto unregister_dev; | |
228 | ||
229 | if (dd_size) | |
230 | ep->dd_data = &ep[1]; | |
231 | return ep; | |
232 | ||
233 | unregister_dev: | |
234 | device_unregister(&ep->dev); | |
235 | return NULL; | |
236 | ||
237 | free_ep: | |
238 | kfree(ep); | |
239 | return NULL; | |
240 | } | |
241 | EXPORT_SYMBOL_GPL(iscsi_create_endpoint); | |
242 | ||
243 | void iscsi_destroy_endpoint(struct iscsi_endpoint *ep) | |
244 | { | |
245 | sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group); | |
246 | device_unregister(&ep->dev); | |
247 | } | |
248 | EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint); | |
249 | ||
250 | struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle) | |
251 | { | |
f80f868e | 252 | struct iscsi_endpoint *ep; |
d82ff9be MC |
253 | struct device *dev; |
254 | ||
695794ae | 255 | dev = class_find_device(&iscsi_endpoint_class, NULL, &handle, |
d82ff9be MC |
256 | iscsi_match_epid); |
257 | if (!dev) | |
258 | return NULL; | |
259 | ||
f80f868e MC |
260 | ep = iscsi_dev_to_endpoint(dev); |
261 | /* | |
262 | * we can drop this now because the interface will prevent | |
263 | * removals and lookups from racing. | |
264 | */ | |
265 | put_device(dev); | |
266 | return ep; | |
d82ff9be MC |
267 | } |
268 | EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint); | |
269 | ||
8d07913d MC |
270 | /* |
271 | * Interface to display network param to sysfs | |
272 | */ | |
273 | ||
274 | static void iscsi_iface_release(struct device *dev) | |
275 | { | |
276 | struct iscsi_iface *iface = iscsi_dev_to_iface(dev); | |
277 | struct device *parent = iface->dev.parent; | |
278 | ||
279 | kfree(iface); | |
280 | put_device(parent); | |
281 | } | |
282 | ||
283 | ||
284 | static struct class iscsi_iface_class = { | |
285 | .name = "iscsi_iface", | |
286 | .dev_release = iscsi_iface_release, | |
287 | }; | |
288 | ||
289 | #define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \ | |
290 | struct device_attribute dev_attr_##_prefix##_##_name = \ | |
291 | __ATTR(_name, _mode, _show, _store) | |
292 | ||
293 | /* iface attrs show */ | |
294 | #define iscsi_iface_attr_show(type, name, param_type, param) \ | |
295 | static ssize_t \ | |
296 | show_##type##_##name(struct device *dev, struct device_attribute *attr, \ | |
297 | char *buf) \ | |
298 | { \ | |
299 | struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \ | |
300 | struct iscsi_transport *t = iface->transport; \ | |
301 | return t->get_iface_param(iface, param_type, param, buf); \ | |
302 | } \ | |
303 | ||
304 | #define iscsi_iface_net_attr(type, name, param) \ | |
305 | iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \ | |
306 | static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL); | |
307 | ||
308 | /* generic read only ipvi4 attribute */ | |
309 | iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR); | |
310 | iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW); | |
311 | iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET); | |
312 | iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO); | |
313 | ||
314 | /* generic read only ipv6 attribute */ | |
315 | iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR); | |
316 | iscsi_iface_net_attr(ipv6_iface, link_local_addr, ISCSI_NET_PARAM_IPV6_LINKLOCAL); | |
317 | iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER); | |
318 | iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg, | |
319 | ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG); | |
88f4f517 | 320 | iscsi_iface_net_attr(ipv6_iface, link_local_autocfg, |
8d07913d MC |
321 | ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG); |
322 | ||
323 | /* common read only iface attribute */ | |
324 | iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE); | |
2d63673b | 325 | iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID); |
4223b9e9 MC |
326 | iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY); |
327 | iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED); | |
8c7d40fb | 328 | iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU); |
fcb5124e | 329 | iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT); |
8d07913d | 330 | |
587a1f16 | 331 | static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj, |
8d07913d MC |
332 | struct attribute *attr, int i) |
333 | { | |
334 | struct device *dev = container_of(kobj, struct device, kobj); | |
335 | struct iscsi_iface *iface = iscsi_dev_to_iface(dev); | |
336 | struct iscsi_transport *t = iface->transport; | |
b78dbba0 | 337 | int param; |
8d07913d MC |
338 | |
339 | if (attr == &dev_attr_iface_enabled.attr) | |
b78dbba0 | 340 | param = ISCSI_NET_PARAM_IFACE_ENABLE; |
2d63673b | 341 | else if (attr == &dev_attr_iface_vlan_id.attr) |
b78dbba0 | 342 | param = ISCSI_NET_PARAM_VLAN_ID; |
4223b9e9 MC |
343 | else if (attr == &dev_attr_iface_vlan_priority.attr) |
344 | param = ISCSI_NET_PARAM_VLAN_PRIORITY; | |
345 | else if (attr == &dev_attr_iface_vlan_enabled.attr) | |
346 | param = ISCSI_NET_PARAM_VLAN_ENABLED; | |
8c7d40fb VC |
347 | else if (attr == &dev_attr_iface_mtu.attr) |
348 | param = ISCSI_NET_PARAM_MTU; | |
fcb5124e VC |
349 | else if (attr == &dev_attr_iface_port.attr) |
350 | param = ISCSI_NET_PARAM_PORT; | |
b78dbba0 | 351 | else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) { |
8d07913d | 352 | if (attr == &dev_attr_ipv4_iface_ipaddress.attr) |
b78dbba0 | 353 | param = ISCSI_NET_PARAM_IPV4_ADDR; |
8d07913d | 354 | else if (attr == &dev_attr_ipv4_iface_gateway.attr) |
b78dbba0 | 355 | param = ISCSI_NET_PARAM_IPV4_GW; |
8d07913d | 356 | else if (attr == &dev_attr_ipv4_iface_subnet.attr) |
b78dbba0 | 357 | param = ISCSI_NET_PARAM_IPV4_SUBNET; |
8d07913d | 358 | else if (attr == &dev_attr_ipv4_iface_bootproto.attr) |
b78dbba0 MC |
359 | param = ISCSI_NET_PARAM_IPV4_BOOTPROTO; |
360 | else | |
361 | return 0; | |
8d07913d MC |
362 | } else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) { |
363 | if (attr == &dev_attr_ipv6_iface_ipaddress.attr) | |
b78dbba0 | 364 | param = ISCSI_NET_PARAM_IPV6_ADDR; |
8d07913d | 365 | else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr) |
b78dbba0 | 366 | param = ISCSI_NET_PARAM_IPV6_LINKLOCAL; |
8d07913d | 367 | else if (attr == &dev_attr_ipv6_iface_router_addr.attr) |
b78dbba0 | 368 | param = ISCSI_NET_PARAM_IPV6_ROUTER; |
8d07913d | 369 | else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr) |
b78dbba0 | 370 | param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG; |
88f4f517 | 371 | else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr) |
b78dbba0 MC |
372 | param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG; |
373 | else | |
374 | return 0; | |
375 | } else { | |
376 | WARN_ONCE(1, "Invalid iface attr"); | |
377 | return 0; | |
8d07913d MC |
378 | } |
379 | ||
b78dbba0 | 380 | return t->attr_is_visible(ISCSI_NET_PARAM, param); |
8d07913d MC |
381 | } |
382 | ||
383 | static struct attribute *iscsi_iface_attrs[] = { | |
384 | &dev_attr_iface_enabled.attr, | |
2d63673b | 385 | &dev_attr_iface_vlan_id.attr, |
4223b9e9 MC |
386 | &dev_attr_iface_vlan_priority.attr, |
387 | &dev_attr_iface_vlan_enabled.attr, | |
8d07913d MC |
388 | &dev_attr_ipv4_iface_ipaddress.attr, |
389 | &dev_attr_ipv4_iface_gateway.attr, | |
390 | &dev_attr_ipv4_iface_subnet.attr, | |
391 | &dev_attr_ipv4_iface_bootproto.attr, | |
392 | &dev_attr_ipv6_iface_ipaddress.attr, | |
393 | &dev_attr_ipv6_iface_link_local_addr.attr, | |
394 | &dev_attr_ipv6_iface_router_addr.attr, | |
395 | &dev_attr_ipv6_iface_ipaddr_autocfg.attr, | |
88f4f517 | 396 | &dev_attr_ipv6_iface_link_local_autocfg.attr, |
8c7d40fb | 397 | &dev_attr_iface_mtu.attr, |
fcb5124e | 398 | &dev_attr_iface_port.attr, |
8d07913d MC |
399 | NULL, |
400 | }; | |
401 | ||
402 | static struct attribute_group iscsi_iface_group = { | |
403 | .attrs = iscsi_iface_attrs, | |
404 | .is_visible = iscsi_iface_attr_is_visible, | |
405 | }; | |
406 | ||
407 | struct iscsi_iface * | |
408 | iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport, | |
409 | uint32_t iface_type, uint32_t iface_num, int dd_size) | |
410 | { | |
411 | struct iscsi_iface *iface; | |
412 | int err; | |
413 | ||
414 | iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL); | |
415 | if (!iface) | |
416 | return NULL; | |
417 | ||
418 | iface->transport = transport; | |
419 | iface->iface_type = iface_type; | |
420 | iface->iface_num = iface_num; | |
421 | iface->dev.release = iscsi_iface_release; | |
422 | iface->dev.class = &iscsi_iface_class; | |
423 | /* parent reference released in iscsi_iface_release */ | |
424 | iface->dev.parent = get_device(&shost->shost_gendev); | |
425 | if (iface_type == ISCSI_IFACE_TYPE_IPV4) | |
426 | dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no, | |
427 | iface_num); | |
428 | else | |
429 | dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no, | |
430 | iface_num); | |
431 | ||
432 | err = device_register(&iface->dev); | |
433 | if (err) | |
434 | goto free_iface; | |
435 | ||
436 | err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group); | |
437 | if (err) | |
438 | goto unreg_iface; | |
439 | ||
440 | if (dd_size) | |
441 | iface->dd_data = &iface[1]; | |
442 | return iface; | |
443 | ||
444 | unreg_iface: | |
445 | device_unregister(&iface->dev); | |
446 | return NULL; | |
447 | ||
448 | free_iface: | |
449 | put_device(iface->dev.parent); | |
450 | kfree(iface); | |
451 | return NULL; | |
452 | } | |
453 | EXPORT_SYMBOL_GPL(iscsi_create_iface); | |
454 | ||
455 | void iscsi_destroy_iface(struct iscsi_iface *iface) | |
456 | { | |
457 | sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group); | |
458 | device_unregister(&iface->dev); | |
459 | } | |
460 | EXPORT_SYMBOL_GPL(iscsi_destroy_iface); | |
461 | ||
90eeb01a MC |
462 | /* |
463 | * BSG support | |
464 | */ | |
465 | /** | |
466 | * iscsi_bsg_host_dispatch - Dispatch command to LLD. | |
467 | * @job: bsg job to be processed | |
468 | */ | |
469 | static int iscsi_bsg_host_dispatch(struct bsg_job *job) | |
470 | { | |
471 | struct Scsi_Host *shost = iscsi_job_to_shost(job); | |
472 | struct iscsi_bsg_request *req = job->request; | |
473 | struct iscsi_bsg_reply *reply = job->reply; | |
474 | struct iscsi_internal *i = to_iscsi_internal(shost->transportt); | |
475 | int cmdlen = sizeof(uint32_t); /* start with length of msgcode */ | |
476 | int ret; | |
477 | ||
478 | /* check if we have the msgcode value at least */ | |
479 | if (job->request_len < sizeof(uint32_t)) { | |
480 | ret = -ENOMSG; | |
481 | goto fail_host_msg; | |
482 | } | |
483 | ||
484 | /* Validate the host command */ | |
485 | switch (req->msgcode) { | |
486 | case ISCSI_BSG_HST_VENDOR: | |
487 | cmdlen += sizeof(struct iscsi_bsg_host_vendor); | |
488 | if ((shost->hostt->vendor_id == 0L) || | |
489 | (req->rqst_data.h_vendor.vendor_id != | |
490 | shost->hostt->vendor_id)) { | |
491 | ret = -ESRCH; | |
492 | goto fail_host_msg; | |
493 | } | |
494 | break; | |
495 | default: | |
496 | ret = -EBADR; | |
497 | goto fail_host_msg; | |
498 | } | |
499 | ||
500 | /* check if we really have all the request data needed */ | |
501 | if (job->request_len < cmdlen) { | |
502 | ret = -ENOMSG; | |
503 | goto fail_host_msg; | |
504 | } | |
505 | ||
506 | ret = i->iscsi_transport->bsg_request(job); | |
507 | if (!ret) | |
508 | return 0; | |
509 | ||
510 | fail_host_msg: | |
511 | /* return the errno failure code as the only status */ | |
512 | BUG_ON(job->reply_len < sizeof(uint32_t)); | |
513 | reply->reply_payload_rcv_len = 0; | |
514 | reply->result = ret; | |
515 | job->reply_len = sizeof(uint32_t); | |
516 | bsg_job_done(job, ret, 0); | |
517 | return 0; | |
518 | } | |
519 | ||
520 | /** | |
521 | * iscsi_bsg_host_add - Create and add the bsg hooks to receive requests | |
522 | * @shost: shost for iscsi_host | |
eae627e4 | 523 | * @ihost: iscsi_cls_host adding the structures to |
90eeb01a MC |
524 | */ |
525 | static int | |
526 | iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost) | |
527 | { | |
528 | struct device *dev = &shost->shost_gendev; | |
529 | struct iscsi_internal *i = to_iscsi_internal(shost->transportt); | |
530 | struct request_queue *q; | |
531 | char bsg_name[20]; | |
532 | int ret; | |
533 | ||
534 | if (!i->iscsi_transport->bsg_request) | |
535 | return -ENOTSUPP; | |
536 | ||
537 | snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no); | |
538 | ||
539 | q = __scsi_alloc_queue(shost, bsg_request_fn); | |
540 | if (!q) | |
541 | return -ENOMEM; | |
542 | ||
543 | ret = bsg_setup_queue(dev, q, bsg_name, iscsi_bsg_host_dispatch, 0); | |
544 | if (ret) { | |
545 | shost_printk(KERN_ERR, shost, "bsg interface failed to " | |
546 | "initialize - no request queue\n"); | |
547 | blk_cleanup_queue(q); | |
548 | return ret; | |
549 | } | |
550 | ||
551 | ihost->bsg_q = q; | |
552 | return 0; | |
553 | } | |
554 | ||
30a6c652 | 555 | static int iscsi_setup_host(struct transport_container *tc, struct device *dev, |
ee959b00 | 556 | struct device *cdev) |
30a6c652 MC |
557 | { |
558 | struct Scsi_Host *shost = dev_to_shost(dev); | |
32c6e1b9 | 559 | struct iscsi_cls_host *ihost = shost->shost_data; |
30a6c652 MC |
560 | |
561 | memset(ihost, 0, sizeof(*ihost)); | |
8aae18ad | 562 | atomic_set(&ihost->nr_scans, 0); |
7970634b | 563 | mutex_init(&ihost->mutex); |
90eeb01a MC |
564 | |
565 | iscsi_bsg_host_add(shost, ihost); | |
566 | /* ignore any bsg add error - we just can't do sgio */ | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
571 | static int iscsi_remove_host(struct transport_container *tc, | |
572 | struct device *dev, struct device *cdev) | |
573 | { | |
574 | struct Scsi_Host *shost = dev_to_shost(dev); | |
575 | struct iscsi_cls_host *ihost = shost->shost_data; | |
576 | ||
577 | if (ihost->bsg_q) { | |
578 | bsg_remove_queue(ihost->bsg_q); | |
579 | blk_cleanup_queue(ihost->bsg_q); | |
580 | } | |
30a6c652 MC |
581 | return 0; |
582 | } | |
583 | ||
584 | static DECLARE_TRANSPORT_CLASS(iscsi_host_class, | |
585 | "iscsi_host", | |
586 | iscsi_setup_host, | |
90eeb01a | 587 | iscsi_remove_host, |
30a6c652 MC |
588 | NULL); |
589 | ||
0896b752 AA |
590 | static DECLARE_TRANSPORT_CLASS(iscsi_session_class, |
591 | "iscsi_session", | |
1da177e4 LT |
592 | NULL, |
593 | NULL, | |
594 | NULL); | |
595 | ||
0896b752 AA |
596 | static DECLARE_TRANSPORT_CLASS(iscsi_connection_class, |
597 | "iscsi_connection", | |
1da177e4 LT |
598 | NULL, |
599 | NULL, | |
600 | NULL); | |
0896b752 AA |
601 | |
602 | static struct sock *nls; | |
0b950672 | 603 | static DEFINE_MUTEX(rx_queue_mutex); |
0896b752 | 604 | |
7b7232f3 MC |
605 | static LIST_HEAD(sesslist); |
606 | static DEFINE_SPINLOCK(sesslock); | |
7b8631b5 MC |
607 | static LIST_HEAD(connlist); |
608 | static DEFINE_SPINLOCK(connlock); | |
0896b752 | 609 | |
b5c7a12d MC |
610 | static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn) |
611 | { | |
612 | struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent); | |
613 | return sess->sid; | |
614 | } | |
615 | ||
616 | /* | |
617 | * Returns the matching session to a given sid | |
618 | */ | |
619 | static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid) | |
7b7232f3 MC |
620 | { |
621 | unsigned long flags; | |
622 | struct iscsi_cls_session *sess; | |
623 | ||
624 | spin_lock_irqsave(&sesslock, flags); | |
625 | list_for_each_entry(sess, &sesslist, sess_list) { | |
b5c7a12d | 626 | if (sess->sid == sid) { |
7b7232f3 MC |
627 | spin_unlock_irqrestore(&sesslock, flags); |
628 | return sess; | |
629 | } | |
630 | } | |
631 | spin_unlock_irqrestore(&sesslock, flags); | |
632 | return NULL; | |
633 | } | |
634 | ||
b5c7a12d MC |
635 | /* |
636 | * Returns the matching connection to a given sid / cid tuple | |
637 | */ | |
638 | static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid) | |
7b7232f3 MC |
639 | { |
640 | unsigned long flags; | |
641 | struct iscsi_cls_conn *conn; | |
642 | ||
643 | spin_lock_irqsave(&connlock, flags); | |
644 | list_for_each_entry(conn, &connlist, conn_list) { | |
b5c7a12d | 645 | if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) { |
7b7232f3 MC |
646 | spin_unlock_irqrestore(&connlock, flags); |
647 | return conn; | |
648 | } | |
649 | } | |
650 | spin_unlock_irqrestore(&connlock, flags); | |
651 | return NULL; | |
652 | } | |
653 | ||
7b8631b5 MC |
654 | /* |
655 | * The following functions can be used by LLDs that allocate | |
656 | * their own scsi_hosts or by software iscsi LLDs | |
657 | */ | |
6eabafbe MC |
658 | static struct { |
659 | int value; | |
660 | char *name; | |
661 | } iscsi_session_state_names[] = { | |
662 | { ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" }, | |
663 | { ISCSI_SESSION_FAILED, "FAILED" }, | |
664 | { ISCSI_SESSION_FREE, "FREE" }, | |
665 | }; | |
666 | ||
3b0f208a | 667 | static const char *iscsi_session_state_name(int state) |
6eabafbe MC |
668 | { |
669 | int i; | |
670 | char *name = NULL; | |
671 | ||
672 | for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) { | |
673 | if (iscsi_session_state_names[i].value == state) { | |
674 | name = iscsi_session_state_names[i].name; | |
675 | break; | |
676 | } | |
677 | } | |
678 | return name; | |
679 | } | |
680 | ||
681 | int iscsi_session_chkready(struct iscsi_cls_session *session) | |
682 | { | |
683 | unsigned long flags; | |
684 | int err; | |
685 | ||
686 | spin_lock_irqsave(&session->lock, flags); | |
687 | switch (session->state) { | |
688 | case ISCSI_SESSION_LOGGED_IN: | |
689 | err = 0; | |
690 | break; | |
691 | case ISCSI_SESSION_FAILED: | |
9a1a69a1 | 692 | err = DID_IMM_RETRY << 16; |
6eabafbe MC |
693 | break; |
694 | case ISCSI_SESSION_FREE: | |
56d7fcfa | 695 | err = DID_TRANSPORT_FAILFAST << 16; |
6eabafbe MC |
696 | break; |
697 | default: | |
698 | err = DID_NO_CONNECT << 16; | |
699 | break; | |
700 | } | |
701 | spin_unlock_irqrestore(&session->lock, flags); | |
702 | return err; | |
703 | } | |
704 | EXPORT_SYMBOL_GPL(iscsi_session_chkready); | |
705 | ||
17fa575e MR |
706 | int iscsi_is_session_online(struct iscsi_cls_session *session) |
707 | { | |
708 | unsigned long flags; | |
709 | int ret = 0; | |
710 | ||
711 | spin_lock_irqsave(&session->lock, flags); | |
712 | if (session->state == ISCSI_SESSION_LOGGED_IN) | |
713 | ret = 1; | |
714 | spin_unlock_irqrestore(&session->lock, flags); | |
715 | return ret; | |
716 | } | |
717 | EXPORT_SYMBOL_GPL(iscsi_is_session_online); | |
718 | ||
7b8631b5 MC |
719 | static void iscsi_session_release(struct device *dev) |
720 | { | |
721 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev); | |
7b8631b5 | 722 | struct Scsi_Host *shost; |
0896b752 | 723 | |
7b8631b5 MC |
724 | shost = iscsi_session_to_shost(session); |
725 | scsi_host_put(shost); | |
632248aa | 726 | ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n"); |
7b8631b5 | 727 | kfree(session); |
7b8631b5 | 728 | } |
0896b752 | 729 | |
7b8631b5 MC |
730 | static int iscsi_is_session_dev(const struct device *dev) |
731 | { | |
732 | return dev->release == iscsi_session_release; | |
733 | } | |
0896b752 | 734 | |
a4804cd6 MC |
735 | static int iscsi_iter_session_fn(struct device *dev, void *data) |
736 | { | |
737 | void (* fn) (struct iscsi_cls_session *) = data; | |
738 | ||
739 | if (!iscsi_is_session_dev(dev)) | |
740 | return 0; | |
741 | fn(iscsi_dev_to_session(dev)); | |
742 | return 0; | |
743 | } | |
744 | ||
745 | void iscsi_host_for_each_session(struct Scsi_Host *shost, | |
746 | void (*fn)(struct iscsi_cls_session *)) | |
747 | { | |
748 | device_for_each_child(&shost->shost_gendev, fn, | |
749 | iscsi_iter_session_fn); | |
750 | } | |
751 | EXPORT_SYMBOL_GPL(iscsi_host_for_each_session); | |
752 | ||
8aae18ad MC |
753 | /** |
754 | * iscsi_scan_finished - helper to report when running scans are done | |
755 | * @shost: scsi host | |
756 | * @time: scan run time | |
757 | * | |
758 | * This function can be used by drives like qla4xxx to report to the scsi | |
759 | * layer when the scans it kicked off at module load time are done. | |
760 | */ | |
761 | int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time) | |
762 | { | |
32c6e1b9 | 763 | struct iscsi_cls_host *ihost = shost->shost_data; |
8aae18ad MC |
764 | /* |
765 | * qla4xxx will have kicked off some session unblocks before calling | |
766 | * scsi_scan_host, so just wait for them to complete. | |
767 | */ | |
768 | return !atomic_read(&ihost->nr_scans); | |
769 | } | |
770 | EXPORT_SYMBOL_GPL(iscsi_scan_finished); | |
771 | ||
7970634b MC |
772 | struct iscsi_scan_data { |
773 | unsigned int channel; | |
774 | unsigned int id; | |
775 | unsigned int lun; | |
776 | }; | |
777 | ||
778 | static int iscsi_user_scan_session(struct device *dev, void *data) | |
30a6c652 | 779 | { |
7970634b | 780 | struct iscsi_scan_data *scan_data = data; |
30a6c652 | 781 | struct iscsi_cls_session *session; |
7970634b MC |
782 | struct Scsi_Host *shost; |
783 | struct iscsi_cls_host *ihost; | |
784 | unsigned long flags; | |
785 | unsigned int id; | |
786 | ||
787 | if (!iscsi_is_session_dev(dev)) | |
788 | return 0; | |
789 | ||
790 | session = iscsi_dev_to_session(dev); | |
632248aa MC |
791 | |
792 | ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n"); | |
793 | ||
7970634b MC |
794 | shost = iscsi_session_to_shost(session); |
795 | ihost = shost->shost_data; | |
30a6c652 MC |
796 | |
797 | mutex_lock(&ihost->mutex); | |
7970634b MC |
798 | spin_lock_irqsave(&session->lock, flags); |
799 | if (session->state != ISCSI_SESSION_LOGGED_IN) { | |
800 | spin_unlock_irqrestore(&session->lock, flags); | |
632248aa | 801 | goto user_scan_exit; |
30a6c652 | 802 | } |
7970634b MC |
803 | id = session->target_id; |
804 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 805 | |
7970634b MC |
806 | if (id != ISCSI_MAX_TARGET) { |
807 | if ((scan_data->channel == SCAN_WILD_CARD || | |
808 | scan_data->channel == 0) && | |
809 | (scan_data->id == SCAN_WILD_CARD || | |
810 | scan_data->id == id)) | |
811 | scsi_scan_target(&session->dev, 0, id, | |
812 | scan_data->lun, 1); | |
813 | } | |
632248aa MC |
814 | |
815 | user_scan_exit: | |
7970634b | 816 | mutex_unlock(&ihost->mutex); |
632248aa | 817 | ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n"); |
30a6c652 MC |
818 | return 0; |
819 | } | |
820 | ||
7970634b MC |
821 | static int iscsi_user_scan(struct Scsi_Host *shost, uint channel, |
822 | uint id, uint lun) | |
823 | { | |
824 | struct iscsi_scan_data scan_data; | |
825 | ||
826 | scan_data.channel = channel; | |
827 | scan_data.id = id; | |
828 | scan_data.lun = lun; | |
829 | ||
830 | return device_for_each_child(&shost->shost_gendev, &scan_data, | |
831 | iscsi_user_scan_session); | |
832 | } | |
833 | ||
bd976f62 MC |
834 | static void iscsi_scan_session(struct work_struct *work) |
835 | { | |
836 | struct iscsi_cls_session *session = | |
837 | container_of(work, struct iscsi_cls_session, scan_work); | |
8aae18ad | 838 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 839 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 840 | struct iscsi_scan_data scan_data; |
bd976f62 | 841 | |
7970634b MC |
842 | scan_data.channel = 0; |
843 | scan_data.id = SCAN_WILD_CARD; | |
844 | scan_data.lun = SCAN_WILD_CARD; | |
bd976f62 | 845 | |
7970634b | 846 | iscsi_user_scan_session(&session->dev, &scan_data); |
8aae18ad | 847 | atomic_dec(&ihost->nr_scans); |
bd976f62 MC |
848 | } |
849 | ||
c01be6dc MC |
850 | /** |
851 | * iscsi_block_scsi_eh - block scsi eh until session state has transistioned | |
e6d4ef45 | 852 | * @cmd: scsi cmd passed to scsi eh handler |
c01be6dc MC |
853 | * |
854 | * If the session is down this function will wait for the recovery | |
855 | * timer to fire or for the session to be logged back in. If the | |
856 | * recovery timer fires then FAST_IO_FAIL is returned. The caller | |
857 | * should pass this error value to the scsi eh. | |
858 | */ | |
859 | int iscsi_block_scsi_eh(struct scsi_cmnd *cmd) | |
860 | { | |
861 | struct iscsi_cls_session *session = | |
862 | starget_to_session(scsi_target(cmd->device)); | |
863 | unsigned long flags; | |
864 | int ret = 0; | |
865 | ||
866 | spin_lock_irqsave(&session->lock, flags); | |
867 | while (session->state != ISCSI_SESSION_LOGGED_IN) { | |
868 | if (session->state == ISCSI_SESSION_FREE) { | |
869 | ret = FAST_IO_FAIL; | |
870 | break; | |
871 | } | |
872 | spin_unlock_irqrestore(&session->lock, flags); | |
873 | msleep(1000); | |
874 | spin_lock_irqsave(&session->lock, flags); | |
875 | } | |
876 | spin_unlock_irqrestore(&session->lock, flags); | |
877 | return ret; | |
878 | } | |
879 | EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh); | |
880 | ||
c4028958 | 881 | static void session_recovery_timedout(struct work_struct *work) |
30a6c652 | 882 | { |
c4028958 DH |
883 | struct iscsi_cls_session *session = |
884 | container_of(work, struct iscsi_cls_session, | |
885 | recovery_work.work); | |
6eabafbe | 886 | unsigned long flags; |
30a6c652 | 887 | |
322d739d MC |
888 | iscsi_cls_session_printk(KERN_INFO, session, |
889 | "session recovery timed out after %d secs\n", | |
890 | session->recovery_tmo); | |
30a6c652 | 891 | |
6eabafbe MC |
892 | spin_lock_irqsave(&session->lock, flags); |
893 | switch (session->state) { | |
894 | case ISCSI_SESSION_FAILED: | |
895 | session->state = ISCSI_SESSION_FREE; | |
896 | break; | |
897 | case ISCSI_SESSION_LOGGED_IN: | |
898 | case ISCSI_SESSION_FREE: | |
899 | /* we raced with the unblock's flush */ | |
900 | spin_unlock_irqrestore(&session->lock, flags); | |
901 | return; | |
902 | } | |
903 | spin_unlock_irqrestore(&session->lock, flags); | |
904 | ||
30a6c652 MC |
905 | if (session->transport->session_recovery_timedout) |
906 | session->transport->session_recovery_timedout(session); | |
907 | ||
632248aa | 908 | ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n"); |
30a6c652 | 909 | scsi_target_unblock(&session->dev); |
632248aa | 910 | ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n"); |
30a6c652 MC |
911 | } |
912 | ||
45ab33b6 | 913 | static void __iscsi_unblock_session(struct work_struct *work) |
6eabafbe | 914 | { |
45ab33b6 MC |
915 | struct iscsi_cls_session *session = |
916 | container_of(work, struct iscsi_cls_session, | |
917 | unblock_work); | |
bd976f62 | 918 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
32c6e1b9 | 919 | struct iscsi_cls_host *ihost = shost->shost_data; |
6eabafbe MC |
920 | unsigned long flags; |
921 | ||
632248aa | 922 | ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n"); |
45ab33b6 MC |
923 | /* |
924 | * The recovery and unblock work get run from the same workqueue, | |
925 | * so try to cancel it if it was going to run after this unblock. | |
926 | */ | |
927 | cancel_delayed_work(&session->recovery_work); | |
6eabafbe MC |
928 | spin_lock_irqsave(&session->lock, flags); |
929 | session->state = ISCSI_SESSION_LOGGED_IN; | |
930 | spin_unlock_irqrestore(&session->lock, flags); | |
45ab33b6 MC |
931 | /* start IO */ |
932 | scsi_target_unblock(&session->dev); | |
8aae18ad MC |
933 | /* |
934 | * Only do kernel scanning if the driver is properly hooked into | |
935 | * the async scanning code (drivers like iscsi_tcp do login and | |
936 | * scanning from userspace). | |
937 | */ | |
938 | if (shost->hostt->scan_finished) { | |
06d25af4 | 939 | if (scsi_queue_work(shost, &session->scan_work)) |
8aae18ad MC |
940 | atomic_inc(&ihost->nr_scans); |
941 | } | |
632248aa | 942 | ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n"); |
6eabafbe | 943 | } |
45ab33b6 MC |
944 | |
945 | /** | |
946 | * iscsi_unblock_session - set a session as logged in and start IO. | |
947 | * @session: iscsi session | |
948 | * | |
949 | * Mark a session as ready to accept IO. | |
950 | */ | |
951 | void iscsi_unblock_session(struct iscsi_cls_session *session) | |
952 | { | |
953 | queue_work(iscsi_eh_timer_workq, &session->unblock_work); | |
954 | /* | |
955 | * make sure all the events have completed before tell the driver | |
956 | * it is safe | |
957 | */ | |
958 | flush_workqueue(iscsi_eh_timer_workq); | |
959 | } | |
30a6c652 MC |
960 | EXPORT_SYMBOL_GPL(iscsi_unblock_session); |
961 | ||
45ab33b6 | 962 | static void __iscsi_block_session(struct work_struct *work) |
30a6c652 | 963 | { |
45ab33b6 MC |
964 | struct iscsi_cls_session *session = |
965 | container_of(work, struct iscsi_cls_session, | |
966 | block_work); | |
6eabafbe MC |
967 | unsigned long flags; |
968 | ||
632248aa | 969 | ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n"); |
6eabafbe MC |
970 | spin_lock_irqsave(&session->lock, flags); |
971 | session->state = ISCSI_SESSION_FAILED; | |
972 | spin_unlock_irqrestore(&session->lock, flags); | |
30a6c652 | 973 | scsi_target_block(&session->dev); |
632248aa | 974 | ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n"); |
fdd46dcb MC |
975 | if (session->recovery_tmo >= 0) |
976 | queue_delayed_work(iscsi_eh_timer_workq, | |
977 | &session->recovery_work, | |
978 | session->recovery_tmo * HZ); | |
30a6c652 | 979 | } |
45ab33b6 MC |
980 | |
981 | void iscsi_block_session(struct iscsi_cls_session *session) | |
982 | { | |
983 | queue_work(iscsi_eh_timer_workq, &session->block_work); | |
984 | } | |
30a6c652 MC |
985 | EXPORT_SYMBOL_GPL(iscsi_block_session); |
986 | ||
26974789 MC |
987 | static void __iscsi_unbind_session(struct work_struct *work) |
988 | { | |
989 | struct iscsi_cls_session *session = | |
990 | container_of(work, struct iscsi_cls_session, | |
991 | unbind_work); | |
992 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 993 | struct iscsi_cls_host *ihost = shost->shost_data; |
7970634b | 994 | unsigned long flags; |
8d4a690c | 995 | unsigned int target_id; |
26974789 | 996 | |
632248aa MC |
997 | ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n"); |
998 | ||
26974789 MC |
999 | /* Prevent new scans and make sure scanning is not in progress */ |
1000 | mutex_lock(&ihost->mutex); | |
7970634b MC |
1001 | spin_lock_irqsave(&session->lock, flags); |
1002 | if (session->target_id == ISCSI_MAX_TARGET) { | |
1003 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
1004 | mutex_unlock(&ihost->mutex); |
1005 | return; | |
1006 | } | |
8d4a690c MC |
1007 | |
1008 | target_id = session->target_id; | |
7970634b MC |
1009 | session->target_id = ISCSI_MAX_TARGET; |
1010 | spin_unlock_irqrestore(&session->lock, flags); | |
26974789 MC |
1011 | mutex_unlock(&ihost->mutex); |
1012 | ||
8d4a690c MC |
1013 | if (session->ida_used) |
1014 | ida_simple_remove(&iscsi_sess_ida, target_id); | |
1015 | ||
26974789 MC |
1016 | scsi_remove_target(&session->dev); |
1017 | iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); | |
632248aa | 1018 | ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n"); |
26974789 MC |
1019 | } |
1020 | ||
7b8631b5 | 1021 | struct iscsi_cls_session * |
5d91e209 MC |
1022 | iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
1023 | int dd_size) | |
7b8631b5 MC |
1024 | { |
1025 | struct iscsi_cls_session *session; | |
7b8631b5 | 1026 | |
5d91e209 | 1027 | session = kzalloc(sizeof(*session) + dd_size, |
b5c7a12d | 1028 | GFP_KERNEL); |
7b8631b5 | 1029 | if (!session) |
f53a88da MC |
1030 | return NULL; |
1031 | ||
7b8631b5 | 1032 | session->transport = transport; |
0c70d84b | 1033 | session->creator = -1; |
30a6c652 | 1034 | session->recovery_tmo = 120; |
6eabafbe | 1035 | session->state = ISCSI_SESSION_FREE; |
c4028958 | 1036 | INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); |
30a6c652 | 1037 | INIT_LIST_HEAD(&session->sess_list); |
45ab33b6 MC |
1038 | INIT_WORK(&session->unblock_work, __iscsi_unblock_session); |
1039 | INIT_WORK(&session->block_work, __iscsi_block_session); | |
26974789 | 1040 | INIT_WORK(&session->unbind_work, __iscsi_unbind_session); |
bd976f62 | 1041 | INIT_WORK(&session->scan_work, iscsi_scan_session); |
6eabafbe | 1042 | spin_lock_init(&session->lock); |
7b8631b5 | 1043 | |
6a8a0d36 MC |
1044 | /* this is released in the dev's release function */ |
1045 | scsi_host_get(shost); | |
8434aa8b MC |
1046 | session->dev.parent = &shost->shost_gendev; |
1047 | session->dev.release = iscsi_session_release; | |
1048 | device_initialize(&session->dev); | |
5d91e209 | 1049 | if (dd_size) |
b5c7a12d | 1050 | session->dd_data = &session[1]; |
632248aa MC |
1051 | |
1052 | ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n"); | |
8434aa8b MC |
1053 | return session; |
1054 | } | |
1055 | EXPORT_SYMBOL_GPL(iscsi_alloc_session); | |
1056 | ||
6a8a0d36 | 1057 | int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) |
8434aa8b MC |
1058 | { |
1059 | struct Scsi_Host *shost = iscsi_session_to_shost(session); | |
32c6e1b9 | 1060 | struct iscsi_cls_host *ihost; |
26974789 | 1061 | unsigned long flags; |
8d4a690c | 1062 | int id = 0; |
8434aa8b | 1063 | int err; |
b5c7a12d | 1064 | |
30a6c652 | 1065 | ihost = shost->shost_data; |
41be1444 | 1066 | session->sid = atomic_add_return(1, &iscsi_session_nr); |
7970634b | 1067 | |
8d4a690c MC |
1068 | if (target_id == ISCSI_MAX_TARGET) { |
1069 | id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL); | |
7970634b | 1070 | |
8d4a690c | 1071 | if (id < 0) { |
7970634b | 1072 | iscsi_cls_session_printk(KERN_ERR, session, |
8d4a690c MC |
1073 | "Failure in Target ID Allocation\n"); |
1074 | return id; | |
7970634b | 1075 | } |
8d4a690c MC |
1076 | session->target_id = (unsigned int)id; |
1077 | session->ida_used = true; | |
1078 | } else | |
1079 | session->target_id = target_id; | |
30a6c652 | 1080 | |
71610f55 | 1081 | dev_set_name(&session->dev, "session%u", session->sid); |
8434aa8b | 1082 | err = device_add(&session->dev); |
7b8631b5 | 1083 | if (err) { |
322d739d MC |
1084 | iscsi_cls_session_printk(KERN_ERR, session, |
1085 | "could not register session's dev\n"); | |
8d4a690c | 1086 | goto release_ida; |
7b8631b5 MC |
1087 | } |
1088 | transport_register_device(&session->dev); | |
1089 | ||
26974789 MC |
1090 | spin_lock_irqsave(&sesslock, flags); |
1091 | list_add(&session->sess_list, &sesslist); | |
1092 | spin_unlock_irqrestore(&sesslock, flags); | |
1093 | ||
26974789 | 1094 | iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); |
632248aa | 1095 | ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); |
8434aa8b | 1096 | return 0; |
30a6c652 | 1097 | |
8d4a690c MC |
1098 | release_ida: |
1099 | if (session->ida_used) | |
1100 | ida_simple_remove(&iscsi_sess_ida, session->target_id); | |
1101 | ||
8434aa8b | 1102 | return err; |
7b8631b5 | 1103 | } |
8434aa8b | 1104 | EXPORT_SYMBOL_GPL(iscsi_add_session); |
7b8631b5 MC |
1105 | |
1106 | /** | |
8434aa8b MC |
1107 | * iscsi_create_session - create iscsi class session |
1108 | * @shost: scsi host | |
1109 | * @transport: iscsi transport | |
5d91e209 | 1110 | * @dd_size: private driver data size |
eb44820c | 1111 | * @target_id: which target |
7b8631b5 | 1112 | * |
8434aa8b | 1113 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 1114 | */ |
8434aa8b | 1115 | struct iscsi_cls_session * |
5d91e209 MC |
1116 | iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport, |
1117 | int dd_size, unsigned int target_id) | |
8434aa8b MC |
1118 | { |
1119 | struct iscsi_cls_session *session; | |
1120 | ||
5d91e209 | 1121 | session = iscsi_alloc_session(shost, transport, dd_size); |
8434aa8b MC |
1122 | if (!session) |
1123 | return NULL; | |
1124 | ||
6a8a0d36 | 1125 | if (iscsi_add_session(session, target_id)) { |
8434aa8b MC |
1126 | iscsi_free_session(session); |
1127 | return NULL; | |
1128 | } | |
1129 | return session; | |
1130 | } | |
1131 | EXPORT_SYMBOL_GPL(iscsi_create_session); | |
1132 | ||
26974789 MC |
1133 | static void iscsi_conn_release(struct device *dev) |
1134 | { | |
1135 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); | |
1136 | struct device *parent = conn->dev.parent; | |
1137 | ||
632248aa | 1138 | ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n"); |
26974789 MC |
1139 | kfree(conn); |
1140 | put_device(parent); | |
1141 | } | |
1142 | ||
1143 | static int iscsi_is_conn_dev(const struct device *dev) | |
1144 | { | |
1145 | return dev->release == iscsi_conn_release; | |
1146 | } | |
1147 | ||
1148 | static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) | |
1149 | { | |
1150 | if (!iscsi_is_conn_dev(dev)) | |
1151 | return 0; | |
1152 | return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); | |
1153 | } | |
1154 | ||
8434aa8b | 1155 | void iscsi_remove_session(struct iscsi_cls_session *session) |
7b8631b5 | 1156 | { |
30a6c652 | 1157 | struct Scsi_Host *shost = iscsi_session_to_shost(session); |
26974789 MC |
1158 | unsigned long flags; |
1159 | int err; | |
1160 | ||
632248aa MC |
1161 | ISCSI_DBG_TRANS_SESSION(session, "Removing session\n"); |
1162 | ||
26974789 MC |
1163 | spin_lock_irqsave(&sesslock, flags); |
1164 | list_del(&session->sess_list); | |
1165 | spin_unlock_irqrestore(&sesslock, flags); | |
30a6c652 | 1166 | |
45ab33b6 MC |
1167 | /* make sure there are no blocks/unblocks queued */ |
1168 | flush_workqueue(iscsi_eh_timer_workq); | |
1169 | /* make sure the timedout callout is not running */ | |
1170 | if (!cancel_delayed_work(&session->recovery_work)) | |
1171 | flush_workqueue(iscsi_eh_timer_workq); | |
26974789 MC |
1172 | /* |
1173 | * If we are blocked let commands flow again. The lld or iscsi | |
1174 | * layer should set up the queuecommand to fail commands. | |
45ab33b6 MC |
1175 | * We assume that LLD will not be calling block/unblock while |
1176 | * removing the session. | |
26974789 | 1177 | */ |
6eabafbe MC |
1178 | spin_lock_irqsave(&session->lock, flags); |
1179 | session->state = ISCSI_SESSION_FREE; | |
1180 | spin_unlock_irqrestore(&session->lock, flags); | |
bd976f62 | 1181 | |
45ab33b6 MC |
1182 | scsi_target_unblock(&session->dev); |
1183 | /* flush running scans then delete devices */ | |
06d25af4 | 1184 | scsi_flush_work(shost); |
45ab33b6 | 1185 | __iscsi_unbind_session(&session->unbind_work); |
30a6c652 | 1186 | |
26974789 MC |
1187 | /* hw iscsi may not have removed all connections from session */ |
1188 | err = device_for_each_child(&session->dev, NULL, | |
1189 | iscsi_iter_destroy_conn_fn); | |
1190 | if (err) | |
322d739d MC |
1191 | iscsi_cls_session_printk(KERN_ERR, session, |
1192 | "Could not delete all connections " | |
1193 | "for session. Error %d.\n", err); | |
8434aa8b | 1194 | |
7b8631b5 | 1195 | transport_unregister_device(&session->dev); |
632248aa MC |
1196 | |
1197 | ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n"); | |
8434aa8b MC |
1198 | device_del(&session->dev); |
1199 | } | |
1200 | EXPORT_SYMBOL_GPL(iscsi_remove_session); | |
1201 | ||
1202 | void iscsi_free_session(struct iscsi_cls_session *session) | |
1203 | { | |
632248aa | 1204 | ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n"); |
26974789 | 1205 | iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); |
8434aa8b | 1206 | put_device(&session->dev); |
7b8631b5 | 1207 | } |
8434aa8b MC |
1208 | EXPORT_SYMBOL_GPL(iscsi_free_session); |
1209 | ||
1210 | /** | |
1211 | * iscsi_destroy_session - destroy iscsi session | |
1212 | * @session: iscsi_session | |
1213 | * | |
1214 | * Can be called by a LLD or iscsi_transport. There must not be | |
1215 | * any running connections. | |
eb44820c | 1216 | */ |
8434aa8b MC |
1217 | int iscsi_destroy_session(struct iscsi_cls_session *session) |
1218 | { | |
1219 | iscsi_remove_session(session); | |
632248aa | 1220 | ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n"); |
8434aa8b MC |
1221 | iscsi_free_session(session); |
1222 | return 0; | |
1223 | } | |
7b8631b5 MC |
1224 | EXPORT_SYMBOL_GPL(iscsi_destroy_session); |
1225 | ||
7b8631b5 MC |
1226 | /** |
1227 | * iscsi_create_conn - create iscsi class connection | |
1228 | * @session: iscsi cls session | |
5d91e209 | 1229 | * @dd_size: private driver data size |
7b8631b5 MC |
1230 | * @cid: connection id |
1231 | * | |
1232 | * This can be called from a LLD or iscsi_transport. The connection | |
1233 | * is child of the session so cid must be unique for all connections | |
1234 | * on the session. | |
b5c7a12d MC |
1235 | * |
1236 | * Since we do not support MCS, cid will normally be zero. In some cases | |
1237 | * for software iscsi we could be trying to preallocate a connection struct | |
1238 | * in which case there could be two connection structs and cid would be | |
1239 | * non-zero. | |
eb44820c | 1240 | */ |
7b8631b5 | 1241 | struct iscsi_cls_conn * |
5d91e209 | 1242 | iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) |
7b8631b5 MC |
1243 | { |
1244 | struct iscsi_transport *transport = session->transport; | |
7b8631b5 | 1245 | struct iscsi_cls_conn *conn; |
26974789 | 1246 | unsigned long flags; |
7b8631b5 MC |
1247 | int err; |
1248 | ||
5d91e209 | 1249 | conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL); |
7b8631b5 MC |
1250 | if (!conn) |
1251 | return NULL; | |
5d91e209 | 1252 | if (dd_size) |
7b8631b5 MC |
1253 | conn->dd_data = &conn[1]; |
1254 | ||
22a39fbb | 1255 | mutex_init(&conn->ep_mutex); |
7b8631b5 MC |
1256 | INIT_LIST_HEAD(&conn->conn_list); |
1257 | conn->transport = transport; | |
b5c7a12d | 1258 | conn->cid = cid; |
7b8631b5 MC |
1259 | |
1260 | /* this is released in the dev's release function */ | |
1261 | if (!get_device(&session->dev)) | |
43a145a3 | 1262 | goto free_conn; |
b5c7a12d | 1263 | |
71610f55 | 1264 | dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid); |
7b8631b5 MC |
1265 | conn->dev.parent = &session->dev; |
1266 | conn->dev.release = iscsi_conn_release; | |
1267 | err = device_register(&conn->dev); | |
1268 | if (err) { | |
322d739d MC |
1269 | iscsi_cls_session_printk(KERN_ERR, session, "could not " |
1270 | "register connection's dev\n"); | |
7b8631b5 MC |
1271 | goto release_parent_ref; |
1272 | } | |
1273 | transport_register_device(&conn->dev); | |
26974789 MC |
1274 | |
1275 | spin_lock_irqsave(&connlock, flags); | |
1276 | list_add(&conn->conn_list, &connlist); | |
26974789 | 1277 | spin_unlock_irqrestore(&connlock, flags); |
632248aa MC |
1278 | |
1279 | ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); | |
7b8631b5 MC |
1280 | return conn; |
1281 | ||
1282 | release_parent_ref: | |
1283 | put_device(&session->dev); | |
1284 | free_conn: | |
1285 | kfree(conn); | |
1286 | return NULL; | |
1287 | } | |
1288 | ||
1289 | EXPORT_SYMBOL_GPL(iscsi_create_conn); | |
1290 | ||
1291 | /** | |
1292 | * iscsi_destroy_conn - destroy iscsi class connection | |
eb44820c | 1293 | * @conn: iscsi cls session |
7b8631b5 | 1294 | * |
26974789 | 1295 | * This can be called from a LLD or iscsi_transport. |
eb44820c | 1296 | */ |
7b8631b5 MC |
1297 | int iscsi_destroy_conn(struct iscsi_cls_conn *conn) |
1298 | { | |
26974789 MC |
1299 | unsigned long flags; |
1300 | ||
1301 | spin_lock_irqsave(&connlock, flags); | |
26974789 MC |
1302 | list_del(&conn->conn_list); |
1303 | spin_unlock_irqrestore(&connlock, flags); | |
1304 | ||
7b8631b5 | 1305 | transport_unregister_device(&conn->dev); |
632248aa | 1306 | ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n"); |
7b8631b5 MC |
1307 | device_unregister(&conn->dev); |
1308 | return 0; | |
1309 | } | |
7b8631b5 MC |
1310 | EXPORT_SYMBOL_GPL(iscsi_destroy_conn); |
1311 | ||
7b8631b5 MC |
1312 | /* |
1313 | * iscsi interface functions | |
1314 | */ | |
0896b752 AA |
1315 | static struct iscsi_internal * |
1316 | iscsi_if_transport_lookup(struct iscsi_transport *tt) | |
1317 | { | |
1318 | struct iscsi_internal *priv; | |
1319 | unsigned long flags; | |
1320 | ||
1321 | spin_lock_irqsave(&iscsi_transport_lock, flags); | |
1322 | list_for_each_entry(priv, &iscsi_transports, list) { | |
1323 | if (tt == priv->iscsi_transport) { | |
1324 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1325 | return priv; | |
1326 | } | |
1327 | } | |
1328 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
1329 | return NULL; | |
1330 | } | |
1da177e4 | 1331 | |
53cb8a1f | 1332 | static int |
43514774 | 1333 | iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp) |
53cb8a1f | 1334 | { |
43514774 | 1335 | return nlmsg_multicast(nls, skb, 0, group, gfp); |
1da177e4 | 1336 | } |
1da177e4 | 1337 | |
7b7232f3 | 1338 | int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr, |
0896b752 | 1339 | char *data, uint32_t data_size) |
1da177e4 | 1340 | { |
0896b752 AA |
1341 | struct nlmsghdr *nlh; |
1342 | struct sk_buff *skb; | |
1343 | struct iscsi_uevent *ev; | |
0896b752 | 1344 | char *pdu; |
790f39a2 | 1345 | struct iscsi_internal *priv; |
0896b752 AA |
1346 | int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) + |
1347 | data_size); | |
1348 | ||
790f39a2 MC |
1349 | priv = iscsi_if_transport_lookup(conn->transport); |
1350 | if (!priv) | |
1351 | return -EINVAL; | |
1352 | ||
43a145a3 | 1353 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1354 | if (!skb) { |
e5bd7b54 | 1355 | iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED); |
322d739d MC |
1356 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver " |
1357 | "control PDU: OOM\n"); | |
0896b752 AA |
1358 | return -ENOMEM; |
1359 | } | |
1da177e4 | 1360 | |
43514774 | 1361 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1362 | ev = NLMSG_DATA(nlh); |
1363 | memset(ev, 0, sizeof(*ev)); | |
1364 | ev->transport_handle = iscsi_handle(conn->transport); | |
1365 | ev->type = ISCSI_KEVENT_RECV_PDU; | |
b5c7a12d MC |
1366 | ev->r.recv_req.cid = conn->cid; |
1367 | ev->r.recv_req.sid = iscsi_conn_get_sid(conn); | |
0896b752 AA |
1368 | pdu = (char*)ev + sizeof(*ev); |
1369 | memcpy(pdu, hdr, sizeof(struct iscsi_hdr)); | |
1370 | memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size); | |
1da177e4 | 1371 | |
43514774 | 1372 | return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
1da177e4 | 1373 | } |
0896b752 | 1374 | EXPORT_SYMBOL_GPL(iscsi_recv_pdu); |
1da177e4 | 1375 | |
43514774 MC |
1376 | int iscsi_offload_mesg(struct Scsi_Host *shost, |
1377 | struct iscsi_transport *transport, uint32_t type, | |
1378 | char *data, uint16_t data_size) | |
1379 | { | |
1380 | struct nlmsghdr *nlh; | |
1381 | struct sk_buff *skb; | |
1382 | struct iscsi_uevent *ev; | |
1383 | int len = NLMSG_SPACE(sizeof(*ev) + data_size); | |
1384 | ||
a541f840 | 1385 | skb = alloc_skb(len, GFP_ATOMIC); |
43514774 MC |
1386 | if (!skb) { |
1387 | printk(KERN_ERR "can not deliver iscsi offload message:OOM\n"); | |
1388 | return -ENOMEM; | |
1389 | } | |
1390 | ||
1391 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); | |
1392 | ev = NLMSG_DATA(nlh); | |
1393 | memset(ev, 0, sizeof(*ev)); | |
1394 | ev->type = type; | |
1395 | ev->transport_handle = iscsi_handle(transport); | |
1396 | switch (type) { | |
1397 | case ISCSI_KEVENT_PATH_REQ: | |
1398 | ev->r.req_path.host_no = shost->host_no; | |
1399 | break; | |
1400 | case ISCSI_KEVENT_IF_DOWN: | |
1401 | ev->r.notify_if_down.host_no = shost->host_no; | |
1402 | break; | |
1403 | } | |
1404 | ||
1405 | memcpy((char *)ev + sizeof(*ev), data, data_size); | |
1406 | ||
a541f840 | 1407 | return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC); |
43514774 MC |
1408 | } |
1409 | EXPORT_SYMBOL_GPL(iscsi_offload_mesg); | |
1410 | ||
e5bd7b54 | 1411 | void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error) |
1da177e4 | 1412 | { |
0896b752 AA |
1413 | struct nlmsghdr *nlh; |
1414 | struct sk_buff *skb; | |
1415 | struct iscsi_uevent *ev; | |
790f39a2 | 1416 | struct iscsi_internal *priv; |
0896b752 AA |
1417 | int len = NLMSG_SPACE(sizeof(*ev)); |
1418 | ||
790f39a2 MC |
1419 | priv = iscsi_if_transport_lookup(conn->transport); |
1420 | if (!priv) | |
1421 | return; | |
1422 | ||
43a145a3 | 1423 | skb = alloc_skb(len, GFP_ATOMIC); |
0896b752 | 1424 | if (!skb) { |
322d739d MC |
1425 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " |
1426 | "conn error (%d)\n", error); | |
0896b752 AA |
1427 | return; |
1428 | } | |
1429 | ||
43514774 | 1430 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1431 | ev = NLMSG_DATA(nlh); |
1432 | ev->transport_handle = iscsi_handle(conn->transport); | |
1433 | ev->type = ISCSI_KEVENT_CONN_ERROR; | |
0896b752 | 1434 | ev->r.connerror.error = error; |
b5c7a12d MC |
1435 | ev->r.connerror.cid = conn->cid; |
1436 | ev->r.connerror.sid = iscsi_conn_get_sid(conn); | |
1da177e4 | 1437 | |
43514774 | 1438 | iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); |
1da177e4 | 1439 | |
322d739d MC |
1440 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n", |
1441 | error); | |
0896b752 | 1442 | } |
e5bd7b54 | 1443 | EXPORT_SYMBOL_GPL(iscsi_conn_error_event); |
0896b752 | 1444 | |
17fa575e MR |
1445 | void iscsi_conn_login_event(struct iscsi_cls_conn *conn, |
1446 | enum iscsi_conn_state state) | |
1447 | { | |
1448 | struct nlmsghdr *nlh; | |
1449 | struct sk_buff *skb; | |
1450 | struct iscsi_uevent *ev; | |
1451 | struct iscsi_internal *priv; | |
1452 | int len = NLMSG_SPACE(sizeof(*ev)); | |
1453 | ||
1454 | priv = iscsi_if_transport_lookup(conn->transport); | |
1455 | if (!priv) | |
1456 | return; | |
1457 | ||
1458 | skb = alloc_skb(len, GFP_ATOMIC); | |
1459 | if (!skb) { | |
1460 | iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored " | |
1461 | "conn login (%d)\n", state); | |
1462 | return; | |
1463 | } | |
1464 | ||
1465 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); | |
1466 | ev = NLMSG_DATA(nlh); | |
1467 | ev->transport_handle = iscsi_handle(conn->transport); | |
1468 | ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE; | |
1469 | ev->r.conn_login.state = state; | |
1470 | ev->r.conn_login.cid = conn->cid; | |
1471 | ev->r.conn_login.sid = iscsi_conn_get_sid(conn); | |
1472 | iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC); | |
1473 | ||
1474 | iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n", | |
1475 | state); | |
1476 | } | |
1477 | EXPORT_SYMBOL_GPL(iscsi_conn_login_event); | |
1478 | ||
0896b752 | 1479 | static int |
43514774 MC |
1480 | iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi, |
1481 | void *payload, int size) | |
0896b752 AA |
1482 | { |
1483 | struct sk_buff *skb; | |
1484 | struct nlmsghdr *nlh; | |
1485 | int len = NLMSG_SPACE(size); | |
1486 | int flags = multi ? NLM_F_MULTI : 0; | |
1487 | int t = done ? NLMSG_DONE : type; | |
1488 | ||
43a145a3 | 1489 | skb = alloc_skb(len, GFP_ATOMIC); |
239a7dc2 MC |
1490 | if (!skb) { |
1491 | printk(KERN_ERR "Could not allocate skb to send reply.\n"); | |
1492 | return -ENOMEM; | |
1493 | } | |
0896b752 | 1494 | |
43514774 | 1495 | nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0); |
0896b752 AA |
1496 | nlh->nlmsg_flags = flags; |
1497 | memcpy(NLMSG_DATA(nlh), payload, size); | |
43514774 | 1498 | return iscsi_multicast_skb(skb, group, GFP_ATOMIC); |
1da177e4 | 1499 | } |
1da177e4 | 1500 | |
7b8631b5 | 1501 | static int |
5b940adf | 1502 | iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) |
7b8631b5 MC |
1503 | { |
1504 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1505 | struct iscsi_stats *stats; | |
1506 | struct sk_buff *skbstat; | |
1507 | struct iscsi_cls_conn *conn; | |
1508 | struct nlmsghdr *nlhstat; | |
1509 | struct iscsi_uevent *evstat; | |
790f39a2 | 1510 | struct iscsi_internal *priv; |
7b8631b5 MC |
1511 | int len = NLMSG_SPACE(sizeof(*ev) + |
1512 | sizeof(struct iscsi_stats) + | |
1513 | sizeof(struct iscsi_stats_custom) * | |
1514 | ISCSI_STATS_CUSTOM_MAX); | |
1515 | int err = 0; | |
0896b752 | 1516 | |
790f39a2 MC |
1517 | priv = iscsi_if_transport_lookup(transport); |
1518 | if (!priv) | |
1519 | return -EINVAL; | |
1520 | ||
b5c7a12d | 1521 | conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid); |
7b8631b5 MC |
1522 | if (!conn) |
1523 | return -EEXIST; | |
0896b752 | 1524 | |
7b8631b5 MC |
1525 | do { |
1526 | int actual_size; | |
0896b752 | 1527 | |
43a145a3 | 1528 | skbstat = alloc_skb(len, GFP_ATOMIC); |
7b8631b5 | 1529 | if (!skbstat) { |
322d739d MC |
1530 | iscsi_cls_conn_printk(KERN_ERR, conn, "can not " |
1531 | "deliver stats: OOM\n"); | |
7b8631b5 MC |
1532 | return -ENOMEM; |
1533 | } | |
1534 | ||
43514774 | 1535 | nlhstat = __nlmsg_put(skbstat, 0, 0, 0, |
7b8631b5 MC |
1536 | (len - sizeof(*nlhstat)), 0); |
1537 | evstat = NLMSG_DATA(nlhstat); | |
1538 | memset(evstat, 0, sizeof(*evstat)); | |
1539 | evstat->transport_handle = iscsi_handle(conn->transport); | |
1540 | evstat->type = nlh->nlmsg_type; | |
b5c7a12d MC |
1541 | evstat->u.get_stats.cid = |
1542 | ev->u.get_stats.cid; | |
1543 | evstat->u.get_stats.sid = | |
1544 | ev->u.get_stats.sid; | |
7b8631b5 MC |
1545 | stats = (struct iscsi_stats *) |
1546 | ((char*)evstat + sizeof(*evstat)); | |
1547 | memset(stats, 0, sizeof(*stats)); | |
1548 | ||
7b7232f3 | 1549 | transport->get_stats(conn, stats); |
7b8631b5 MC |
1550 | actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) + |
1551 | sizeof(struct iscsi_stats) + | |
1552 | sizeof(struct iscsi_stats_custom) * | |
1553 | stats->custom_length); | |
1554 | actual_size -= sizeof(*nlhstat); | |
1555 | actual_size = NLMSG_LENGTH(actual_size); | |
5b940adf | 1556 | skb_trim(skbstat, NLMSG_ALIGN(actual_size)); |
7b8631b5 MC |
1557 | nlhstat->nlmsg_len = actual_size; |
1558 | ||
43514774 MC |
1559 | err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID, |
1560 | GFP_ATOMIC); | |
7b8631b5 MC |
1561 | } while (err < 0 && err != -ECONNREFUSED); |
1562 | ||
1563 | return err; | |
0896b752 AA |
1564 | } |
1565 | ||
53cb8a1f | 1566 | /** |
26974789 MC |
1567 | * iscsi_session_event - send session destr. completion event |
1568 | * @session: iscsi class session | |
1569 | * @event: type of event | |
eb44820c | 1570 | */ |
26974789 MC |
1571 | int iscsi_session_event(struct iscsi_cls_session *session, |
1572 | enum iscsi_uevent_e event) | |
53cb8a1f MC |
1573 | { |
1574 | struct iscsi_internal *priv; | |
53cb8a1f MC |
1575 | struct Scsi_Host *shost; |
1576 | struct iscsi_uevent *ev; | |
1577 | struct sk_buff *skb; | |
1578 | struct nlmsghdr *nlh; | |
53cb8a1f MC |
1579 | int rc, len = NLMSG_SPACE(sizeof(*ev)); |
1580 | ||
26974789 | 1581 | priv = iscsi_if_transport_lookup(session->transport); |
53cb8a1f MC |
1582 | if (!priv) |
1583 | return -EINVAL; | |
53cb8a1f MC |
1584 | shost = iscsi_session_to_shost(session); |
1585 | ||
43a145a3 | 1586 | skb = alloc_skb(len, GFP_KERNEL); |
53cb8a1f | 1587 | if (!skb) { |
322d739d MC |
1588 | iscsi_cls_session_printk(KERN_ERR, session, |
1589 | "Cannot notify userspace of session " | |
1590 | "event %u\n", event); | |
53cb8a1f MC |
1591 | return -ENOMEM; |
1592 | } | |
1593 | ||
43514774 | 1594 | nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0); |
53cb8a1f | 1595 | ev = NLMSG_DATA(nlh); |
26974789 | 1596 | ev->transport_handle = iscsi_handle(session->transport); |
53cb8a1f | 1597 | |
26974789 MC |
1598 | ev->type = event; |
1599 | switch (event) { | |
1600 | case ISCSI_KEVENT_DESTROY_SESSION: | |
1601 | ev->r.d_session.host_no = shost->host_no; | |
1602 | ev->r.d_session.sid = session->sid; | |
1603 | break; | |
1604 | case ISCSI_KEVENT_CREATE_SESSION: | |
1605 | ev->r.c_session_ret.host_no = shost->host_no; | |
1606 | ev->r.c_session_ret.sid = session->sid; | |
1607 | break; | |
1608 | case ISCSI_KEVENT_UNBIND_SESSION: | |
1609 | ev->r.unbind_session.host_no = shost->host_no; | |
1610 | ev->r.unbind_session.sid = session->sid; | |
1611 | break; | |
1612 | default: | |
322d739d MC |
1613 | iscsi_cls_session_printk(KERN_ERR, session, "Invalid event " |
1614 | "%u.\n", event); | |
26974789 | 1615 | kfree_skb(skb); |
53cb8a1f | 1616 | return -EINVAL; |
53cb8a1f MC |
1617 | } |
1618 | ||
53cb8a1f MC |
1619 | /* |
1620 | * this will occur if the daemon is not up, so we just warn | |
1621 | * the user and when the daemon is restarted it will handle it | |
1622 | */ | |
43514774 | 1623 | rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL); |
ff491a73 | 1624 | if (rc == -ESRCH) |
322d739d MC |
1625 | iscsi_cls_session_printk(KERN_ERR, session, |
1626 | "Cannot notify userspace of session " | |
1627 | "event %u. Check iscsi daemon\n", | |
1628 | event); | |
632248aa MC |
1629 | |
1630 | ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n", | |
1631 | event, rc); | |
53cb8a1f MC |
1632 | return rc; |
1633 | } | |
26974789 | 1634 | EXPORT_SYMBOL_GPL(iscsi_session_event); |
53cb8a1f | 1635 | |
0896b752 | 1636 | static int |
d82ff9be | 1637 | iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep, |
0c70d84b MC |
1638 | struct iscsi_uevent *ev, pid_t pid, |
1639 | uint32_t initial_cmdsn, uint16_t cmds_max, | |
1640 | uint16_t queue_depth) | |
0896b752 AA |
1641 | { |
1642 | struct iscsi_transport *transport = priv->iscsi_transport; | |
7b7232f3 | 1643 | struct iscsi_cls_session *session; |
5e7facb7 | 1644 | struct Scsi_Host *shost; |
0896b752 | 1645 | |
d82ff9be | 1646 | session = transport->create_session(ep, cmds_max, queue_depth, |
5e7facb7 | 1647 | initial_cmdsn); |
7b7232f3 | 1648 | if (!session) |
7b8631b5 | 1649 | return -ENOMEM; |
0896b752 | 1650 | |
0c70d84b | 1651 | session->creator = pid; |
5e7facb7 MC |
1652 | shost = iscsi_session_to_shost(session); |
1653 | ev->r.c_session_ret.host_no = shost->host_no; | |
b5c7a12d | 1654 | ev->r.c_session_ret.sid = session->sid; |
632248aa MC |
1655 | ISCSI_DBG_TRANS_SESSION(session, |
1656 | "Completed creating transport session\n"); | |
0896b752 | 1657 | return 0; |
0896b752 AA |
1658 | } |
1659 | ||
1660 | static int | |
7b7232f3 | 1661 | iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
0896b752 | 1662 | { |
7b8631b5 | 1663 | struct iscsi_cls_conn *conn; |
7b7232f3 | 1664 | struct iscsi_cls_session *session; |
7b8631b5 | 1665 | |
b5c7a12d MC |
1666 | session = iscsi_session_lookup(ev->u.c_conn.sid); |
1667 | if (!session) { | |
322d739d | 1668 | printk(KERN_ERR "iscsi: invalid session %d.\n", |
b5c7a12d | 1669 | ev->u.c_conn.sid); |
7b8631b5 | 1670 | return -EINVAL; |
b5c7a12d | 1671 | } |
0896b752 | 1672 | |
7b7232f3 | 1673 | conn = transport->create_conn(session, ev->u.c_conn.cid); |
b5c7a12d | 1674 | if (!conn) { |
322d739d MC |
1675 | iscsi_cls_session_printk(KERN_ERR, session, |
1676 | "couldn't create a new connection."); | |
7b7232f3 | 1677 | return -ENOMEM; |
b5c7a12d | 1678 | } |
0896b752 | 1679 | |
b5c7a12d MC |
1680 | ev->r.c_conn_ret.sid = session->sid; |
1681 | ev->r.c_conn_ret.cid = conn->cid; | |
632248aa MC |
1682 | |
1683 | ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n"); | |
0896b752 | 1684 | return 0; |
1da177e4 LT |
1685 | } |
1686 | ||
0896b752 AA |
1687 | static int |
1688 | iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1689 | { | |
7b8631b5 | 1690 | struct iscsi_cls_conn *conn; |
0896b752 | 1691 | |
b5c7a12d | 1692 | conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); |
0896b752 | 1693 | if (!conn) |
7b8631b5 | 1694 | return -EINVAL; |
0896b752 | 1695 | |
632248aa | 1696 | ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n"); |
7b8631b5 MC |
1697 | if (transport->destroy_conn) |
1698 | transport->destroy_conn(conn); | |
632248aa | 1699 | |
7b8631b5 | 1700 | return 0; |
0896b752 AA |
1701 | } |
1702 | ||
fd7255f5 MC |
1703 | static int |
1704 | iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev) | |
1705 | { | |
1706 | char *data = (char*)ev + sizeof(*ev); | |
1707 | struct iscsi_cls_conn *conn; | |
1708 | struct iscsi_cls_session *session; | |
a54a52ca | 1709 | int err = 0, value = 0; |
fd7255f5 MC |
1710 | |
1711 | session = iscsi_session_lookup(ev->u.set_param.sid); | |
1712 | conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid); | |
1713 | if (!conn || !session) | |
1714 | return -EINVAL; | |
1715 | ||
1716 | switch (ev->u.set_param.param) { | |
30a6c652 | 1717 | case ISCSI_PARAM_SESS_RECOVERY_TMO: |
a54a52ca | 1718 | sscanf(data, "%d", &value); |
fdd46dcb | 1719 | session->recovery_tmo = value; |
30a6c652 | 1720 | break; |
fd7255f5 | 1721 | default: |
a54a52ca MC |
1722 | err = transport->set_param(conn, ev->u.set_param.param, |
1723 | data, ev->u.set_param.len); | |
fd7255f5 MC |
1724 | } |
1725 | ||
1726 | return err; | |
1727 | } | |
1728 | ||
10eb0f01 MC |
1729 | static int iscsi_if_ep_connect(struct iscsi_transport *transport, |
1730 | struct iscsi_uevent *ev, int msg_type) | |
1731 | { | |
1732 | struct iscsi_endpoint *ep; | |
1733 | struct sockaddr *dst_addr; | |
1734 | struct Scsi_Host *shost = NULL; | |
1735 | int non_blocking, err = 0; | |
1736 | ||
1737 | if (!transport->ep_connect) | |
1738 | return -EINVAL; | |
1739 | ||
1740 | if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) { | |
1741 | shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no); | |
1742 | if (!shost) { | |
1743 | printk(KERN_ERR "ep connect failed. Could not find " | |
1744 | "host no %u\n", | |
1745 | ev->u.ep_connect_through_host.host_no); | |
1746 | return -ENODEV; | |
1747 | } | |
1748 | non_blocking = ev->u.ep_connect_through_host.non_blocking; | |
1749 | } else | |
1750 | non_blocking = ev->u.ep_connect.non_blocking; | |
1751 | ||
1752 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); | |
1753 | ep = transport->ep_connect(shost, dst_addr, non_blocking); | |
1754 | if (IS_ERR(ep)) { | |
1755 | err = PTR_ERR(ep); | |
1756 | goto release_host; | |
1757 | } | |
1758 | ||
1759 | ev->r.ep_connect_ret.handle = ep->id; | |
1760 | release_host: | |
1761 | if (shost) | |
1762 | scsi_host_put(shost); | |
1763 | return err; | |
1764 | } | |
1765 | ||
22a39fbb MC |
1766 | static int iscsi_if_ep_disconnect(struct iscsi_transport *transport, |
1767 | u64 ep_handle) | |
1768 | { | |
1769 | struct iscsi_cls_conn *conn; | |
1770 | struct iscsi_endpoint *ep; | |
1771 | ||
1772 | if (!transport->ep_disconnect) | |
1773 | return -EINVAL; | |
1774 | ||
1775 | ep = iscsi_lookup_endpoint(ep_handle); | |
1776 | if (!ep) | |
1777 | return -EINVAL; | |
1778 | conn = ep->conn; | |
1779 | if (conn) { | |
1780 | mutex_lock(&conn->ep_mutex); | |
1781 | conn->ep = NULL; | |
1782 | mutex_unlock(&conn->ep_mutex); | |
1783 | } | |
1784 | ||
1785 | transport->ep_disconnect(ep); | |
1786 | return 0; | |
1787 | } | |
1788 | ||
264faaaa OG |
1789 | static int |
1790 | iscsi_if_transport_ep(struct iscsi_transport *transport, | |
1791 | struct iscsi_uevent *ev, int msg_type) | |
1792 | { | |
d82ff9be | 1793 | struct iscsi_endpoint *ep; |
264faaaa OG |
1794 | int rc = 0; |
1795 | ||
1796 | switch (msg_type) { | |
10eb0f01 | 1797 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: |
264faaaa | 1798 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
10eb0f01 | 1799 | rc = iscsi_if_ep_connect(transport, ev, msg_type); |
264faaaa OG |
1800 | break; |
1801 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
1802 | if (!transport->ep_poll) | |
1803 | return -EINVAL; | |
1804 | ||
d82ff9be MC |
1805 | ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle); |
1806 | if (!ep) | |
1807 | return -EINVAL; | |
1808 | ||
1809 | ev->r.retcode = transport->ep_poll(ep, | |
264faaaa OG |
1810 | ev->u.ep_poll.timeout_ms); |
1811 | break; | |
1812 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
22a39fbb MC |
1813 | rc = iscsi_if_ep_disconnect(transport, |
1814 | ev->u.ep_disconnect.ep_handle); | |
264faaaa OG |
1815 | break; |
1816 | } | |
1817 | return rc; | |
1818 | } | |
1819 | ||
01cb225d MC |
1820 | static int |
1821 | iscsi_tgt_dscvr(struct iscsi_transport *transport, | |
1822 | struct iscsi_uevent *ev) | |
1823 | { | |
2174a04e | 1824 | struct Scsi_Host *shost; |
01cb225d | 1825 | struct sockaddr *dst_addr; |
2174a04e | 1826 | int err; |
01cb225d MC |
1827 | |
1828 | if (!transport->tgt_dscvr) | |
1829 | return -EINVAL; | |
1830 | ||
2174a04e | 1831 | shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no); |
315cb0ad | 1832 | if (!shost) { |
2174a04e MC |
1833 | printk(KERN_ERR "target discovery could not find host no %u\n", |
1834 | ev->u.tgt_dscvr.host_no); | |
1835 | return -ENODEV; | |
1836 | } | |
1837 | ||
1838 | ||
01cb225d | 1839 | dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev)); |
2174a04e MC |
1840 | err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type, |
1841 | ev->u.tgt_dscvr.enable, dst_addr); | |
1842 | scsi_host_put(shost); | |
1843 | return err; | |
01cb225d MC |
1844 | } |
1845 | ||
1d9bf13a MC |
1846 | static int |
1847 | iscsi_set_host_param(struct iscsi_transport *transport, | |
1848 | struct iscsi_uevent *ev) | |
1849 | { | |
1850 | char *data = (char*)ev + sizeof(*ev); | |
1851 | struct Scsi_Host *shost; | |
1852 | int err; | |
1853 | ||
1854 | if (!transport->set_host_param) | |
1855 | return -ENOSYS; | |
1856 | ||
1857 | shost = scsi_host_lookup(ev->u.set_host_param.host_no); | |
315cb0ad | 1858 | if (!shost) { |
1d9bf13a MC |
1859 | printk(KERN_ERR "set_host_param could not find host no %u\n", |
1860 | ev->u.set_host_param.host_no); | |
1861 | return -ENODEV; | |
1862 | } | |
1863 | ||
1864 | err = transport->set_host_param(shost, ev->u.set_host_param.param, | |
1865 | data, ev->u.set_host_param.len); | |
1866 | scsi_host_put(shost); | |
1867 | return err; | |
1868 | } | |
1869 | ||
0896b752 | 1870 | static int |
43514774 MC |
1871 | iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev) |
1872 | { | |
1873 | struct Scsi_Host *shost; | |
1874 | struct iscsi_path *params; | |
1875 | int err; | |
1876 | ||
1877 | if (!transport->set_path) | |
1878 | return -ENOSYS; | |
1879 | ||
1880 | shost = scsi_host_lookup(ev->u.set_path.host_no); | |
1881 | if (!shost) { | |
1882 | printk(KERN_ERR "set path could not find host no %u\n", | |
1883 | ev->u.set_path.host_no); | |
1884 | return -ENODEV; | |
1885 | } | |
1886 | ||
1887 | params = (struct iscsi_path *)((char *)ev + sizeof(*ev)); | |
1888 | err = transport->set_path(shost, params); | |
1889 | ||
1890 | scsi_host_put(shost); | |
1891 | return err; | |
1892 | } | |
1893 | ||
56c155b5 MC |
1894 | static int |
1895 | iscsi_set_iface_params(struct iscsi_transport *transport, | |
00c31889 | 1896 | struct iscsi_uevent *ev, uint32_t len) |
56c155b5 MC |
1897 | { |
1898 | char *data = (char *)ev + sizeof(*ev); | |
1899 | struct Scsi_Host *shost; | |
1900 | int err; | |
1901 | ||
1902 | if (!transport->set_iface_param) | |
1903 | return -ENOSYS; | |
1904 | ||
1905 | shost = scsi_host_lookup(ev->u.set_iface_params.host_no); | |
1906 | if (!shost) { | |
1907 | printk(KERN_ERR "set_iface_params could not find host no %u\n", | |
1908 | ev->u.set_iface_params.host_no); | |
1909 | return -ENODEV; | |
1910 | } | |
1911 | ||
00c31889 | 1912 | err = transport->set_iface_param(shost, data, len); |
56c155b5 MC |
1913 | scsi_host_put(shost); |
1914 | return err; | |
1915 | } | |
1916 | ||
43514774 MC |
1917 | static int |
1918 | iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group) | |
0896b752 AA |
1919 | { |
1920 | int err = 0; | |
1921 | struct iscsi_uevent *ev = NLMSG_DATA(nlh); | |
1922 | struct iscsi_transport *transport = NULL; | |
1923 | struct iscsi_internal *priv; | |
7b7232f3 MC |
1924 | struct iscsi_cls_session *session; |
1925 | struct iscsi_cls_conn *conn; | |
d82ff9be | 1926 | struct iscsi_endpoint *ep = NULL; |
0896b752 | 1927 | |
43514774 MC |
1928 | if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE) |
1929 | *group = ISCSI_NL_GRP_UIP; | |
1930 | else | |
1931 | *group = ISCSI_NL_GRP_ISCSID; | |
1932 | ||
0896b752 AA |
1933 | priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); |
1934 | if (!priv) | |
1935 | return -EINVAL; | |
1936 | transport = priv->iscsi_transport; | |
1937 | ||
7b7232f3 MC |
1938 | if (!try_module_get(transport->owner)) |
1939 | return -EINVAL; | |
1940 | ||
0896b752 AA |
1941 | switch (nlh->nlmsg_type) { |
1942 | case ISCSI_UEVENT_CREATE_SESSION: | |
d82ff9be | 1943 | err = iscsi_if_create_session(priv, ep, ev, |
0c70d84b | 1944 | NETLINK_CREDS(skb)->pid, |
40753caa MC |
1945 | ev->u.c_session.initial_cmdsn, |
1946 | ev->u.c_session.cmds_max, | |
1947 | ev->u.c_session.queue_depth); | |
1948 | break; | |
1949 | case ISCSI_UEVENT_CREATE_BOUND_SESSION: | |
d82ff9be | 1950 | ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle); |
c95fddc7 MC |
1951 | if (!ep) { |
1952 | err = -EINVAL; | |
1953 | break; | |
1954 | } | |
d82ff9be MC |
1955 | |
1956 | err = iscsi_if_create_session(priv, ep, ev, | |
0c70d84b | 1957 | NETLINK_CREDS(skb)->pid, |
40753caa MC |
1958 | ev->u.c_bound_session.initial_cmdsn, |
1959 | ev->u.c_bound_session.cmds_max, | |
1960 | ev->u.c_bound_session.queue_depth); | |
0896b752 AA |
1961 | break; |
1962 | case ISCSI_UEVENT_DESTROY_SESSION: | |
b5c7a12d | 1963 | session = iscsi_session_lookup(ev->u.d_session.sid); |
26974789 | 1964 | if (session) |
7b7232f3 | 1965 | transport->destroy_session(session); |
26974789 MC |
1966 | else |
1967 | err = -EINVAL; | |
1968 | break; | |
1969 | case ISCSI_UEVENT_UNBIND_SESSION: | |
1970 | session = iscsi_session_lookup(ev->u.d_session.sid); | |
1971 | if (session) | |
06d25af4 MC |
1972 | scsi_queue_work(iscsi_session_to_shost(session), |
1973 | &session->unbind_work); | |
26974789 | 1974 | else |
7b7232f3 | 1975 | err = -EINVAL; |
0896b752 AA |
1976 | break; |
1977 | case ISCSI_UEVENT_CREATE_CONN: | |
1978 | err = iscsi_if_create_conn(transport, ev); | |
1979 | break; | |
1980 | case ISCSI_UEVENT_DESTROY_CONN: | |
1981 | err = iscsi_if_destroy_conn(transport, ev); | |
1982 | break; | |
1983 | case ISCSI_UEVENT_BIND_CONN: | |
b5c7a12d MC |
1984 | session = iscsi_session_lookup(ev->u.b_conn.sid); |
1985 | conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid); | |
7b7232f3 | 1986 | |
22a39fbb MC |
1987 | if (conn && conn->ep) |
1988 | iscsi_if_ep_disconnect(transport, conn->ep->id); | |
1989 | ||
1990 | if (!session || !conn) { | |
7b7232f3 | 1991 | err = -EINVAL; |
22a39fbb MC |
1992 | break; |
1993 | } | |
1994 | ||
1995 | ev->r.retcode = transport->bind_conn(session, conn, | |
1996 | ev->u.b_conn.transport_eph, | |
1997 | ev->u.b_conn.is_leading); | |
1998 | if (ev->r.retcode || !transport->ep_connect) | |
1999 | break; | |
2000 | ||
2001 | ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph); | |
2002 | if (ep) { | |
2003 | ep->conn = conn; | |
2004 | ||
2005 | mutex_lock(&conn->ep_mutex); | |
2006 | conn->ep = ep; | |
2007 | mutex_unlock(&conn->ep_mutex); | |
2008 | } else | |
2009 | iscsi_cls_conn_printk(KERN_ERR, conn, | |
2010 | "Could not set ep conn " | |
2011 | "binding\n"); | |
0896b752 AA |
2012 | break; |
2013 | case ISCSI_UEVENT_SET_PARAM: | |
fd7255f5 | 2014 | err = iscsi_set_param(transport, ev); |
0896b752 AA |
2015 | break; |
2016 | case ISCSI_UEVENT_START_CONN: | |
b5c7a12d | 2017 | conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid); |
7b7232f3 MC |
2018 | if (conn) |
2019 | ev->r.retcode = transport->start_conn(conn); | |
2020 | else | |
2021 | err = -EINVAL; | |
0896b752 AA |
2022 | break; |
2023 | case ISCSI_UEVENT_STOP_CONN: | |
b5c7a12d | 2024 | conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid); |
7b7232f3 MC |
2025 | if (conn) |
2026 | transport->stop_conn(conn, ev->u.stop_conn.flag); | |
2027 | else | |
2028 | err = -EINVAL; | |
0896b752 AA |
2029 | break; |
2030 | case ISCSI_UEVENT_SEND_PDU: | |
b5c7a12d | 2031 | conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid); |
7b7232f3 MC |
2032 | if (conn) |
2033 | ev->r.retcode = transport->send_pdu(conn, | |
2034 | (struct iscsi_hdr*)((char*)ev + sizeof(*ev)), | |
2035 | (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size, | |
2036 | ev->u.send_pdu.data_size); | |
2037 | else | |
2038 | err = -EINVAL; | |
0896b752 AA |
2039 | break; |
2040 | case ISCSI_UEVENT_GET_STATS: | |
5b940adf | 2041 | err = iscsi_if_get_stats(transport, nlh); |
0896b752 | 2042 | break; |
264faaaa OG |
2043 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT: |
2044 | case ISCSI_UEVENT_TRANSPORT_EP_POLL: | |
2045 | case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT: | |
10eb0f01 | 2046 | case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST: |
264faaaa OG |
2047 | err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type); |
2048 | break; | |
01cb225d MC |
2049 | case ISCSI_UEVENT_TGT_DSCVR: |
2050 | err = iscsi_tgt_dscvr(transport, ev); | |
2051 | break; | |
1d9bf13a MC |
2052 | case ISCSI_UEVENT_SET_HOST_PARAM: |
2053 | err = iscsi_set_host_param(transport, ev); | |
2054 | break; | |
43514774 MC |
2055 | case ISCSI_UEVENT_PATH_UPDATE: |
2056 | err = iscsi_set_path(transport, ev); | |
2057 | break; | |
56c155b5 | 2058 | case ISCSI_UEVENT_SET_IFACE_PARAMS: |
00c31889 MC |
2059 | err = iscsi_set_iface_params(transport, ev, |
2060 | nlmsg_attrlen(nlh, sizeof(*ev))); | |
56c155b5 | 2061 | break; |
0896b752 | 2062 | default: |
1d9bf13a | 2063 | err = -ENOSYS; |
0896b752 AA |
2064 | break; |
2065 | } | |
2066 | ||
7b7232f3 | 2067 | module_put(transport->owner); |
0896b752 AA |
2068 | return err; |
2069 | } | |
2070 | ||
b5c7a12d | 2071 | /* |
cd40b7d3 DL |
2072 | * Get message from skb. Each message is processed by iscsi_if_recv_msg. |
2073 | * Malformed skbs with wrong lengths or invalid creds are not processed. | |
b5c7a12d | 2074 | */ |
0896b752 | 2075 | static void |
cd40b7d3 | 2076 | iscsi_if_rx(struct sk_buff *skb) |
0896b752 | 2077 | { |
0b950672 | 2078 | mutex_lock(&rx_queue_mutex); |
cd40b7d3 DL |
2079 | while (skb->len >= NLMSG_SPACE(0)) { |
2080 | int err; | |
2081 | uint32_t rlen; | |
2082 | struct nlmsghdr *nlh; | |
2083 | struct iscsi_uevent *ev; | |
43514774 | 2084 | uint32_t group; |
cd40b7d3 DL |
2085 | |
2086 | nlh = nlmsg_hdr(skb); | |
2087 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
2088 | skb->len < nlh->nlmsg_len) { | |
2089 | break; | |
ee7f8e40 | 2090 | } |
ee7f8e40 | 2091 | |
cd40b7d3 DL |
2092 | ev = NLMSG_DATA(nlh); |
2093 | rlen = NLMSG_ALIGN(nlh->nlmsg_len); | |
2094 | if (rlen > skb->len) | |
2095 | rlen = skb->len; | |
0896b752 | 2096 | |
43514774 | 2097 | err = iscsi_if_recv_msg(skb, nlh, &group); |
cd40b7d3 DL |
2098 | if (err) { |
2099 | ev->type = ISCSI_KEVENT_IF_ERROR; | |
2100 | ev->iferror = err; | |
0896b752 | 2101 | } |
cd40b7d3 DL |
2102 | do { |
2103 | /* | |
2104 | * special case for GET_STATS: | |
2105 | * on success - sending reply and stats from | |
2106 | * inside of if_recv_msg(), | |
2107 | * on error - fall through. | |
2108 | */ | |
2109 | if (ev->type == ISCSI_UEVENT_GET_STATS && !err) | |
2110 | break; | |
43514774 | 2111 | err = iscsi_if_send_reply(group, nlh->nlmsg_seq, |
cd40b7d3 DL |
2112 | nlh->nlmsg_type, 0, 0, ev, sizeof(*ev)); |
2113 | } while (err < 0 && err != -ECONNREFUSED); | |
2114 | skb_pull(skb, rlen); | |
0896b752 | 2115 | } |
0b950672 | 2116 | mutex_unlock(&rx_queue_mutex); |
0896b752 | 2117 | } |
1da177e4 | 2118 | |
fd7255f5 | 2119 | #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \ |
ee959b00 | 2120 | struct device_attribute dev_attr_##_prefix##_##_name = \ |
fd7255f5 MC |
2121 | __ATTR(_name,_mode,_show,_store) |
2122 | ||
1da177e4 | 2123 | /* |
0896b752 | 2124 | * iSCSI connection attrs |
1da177e4 | 2125 | */ |
a54a52ca | 2126 | #define iscsi_conn_attr_show(param) \ |
0896b752 | 2127 | static ssize_t \ |
ee959b00 TJ |
2128 | show_conn_param_##param(struct device *dev, \ |
2129 | struct device_attribute *attr, char *buf) \ | |
0896b752 | 2130 | { \ |
ee959b00 | 2131 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ |
7b8631b5 | 2132 | struct iscsi_transport *t = conn->transport; \ |
a54a52ca | 2133 | return t->get_conn_param(conn, param, buf); \ |
0896b752 AA |
2134 | } |
2135 | ||
a54a52ca MC |
2136 | #define iscsi_conn_attr(field, param) \ |
2137 | iscsi_conn_attr_show(param) \ | |
2138 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \ | |
fd7255f5 | 2139 | NULL); |
0896b752 | 2140 | |
a54a52ca MC |
2141 | iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH); |
2142 | iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH); | |
2143 | iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN); | |
2144 | iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN); | |
2145 | iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN); | |
2146 | iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN); | |
2147 | iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT); | |
a54a52ca MC |
2148 | iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN); |
2149 | iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS); | |
f6d5180c MC |
2150 | iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO); |
2151 | iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO); | |
1da177e4 | 2152 | |
289324b0 MC |
2153 | #define iscsi_conn_ep_attr_show(param) \ |
2154 | static ssize_t show_conn_ep_param_##param(struct device *dev, \ | |
2155 | struct device_attribute *attr,\ | |
2156 | char *buf) \ | |
2157 | { \ | |
2158 | struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \ | |
2159 | struct iscsi_transport *t = conn->transport; \ | |
2160 | struct iscsi_endpoint *ep; \ | |
2161 | ssize_t rc; \ | |
2162 | \ | |
2163 | /* \ | |
2164 | * Need to make sure ep_disconnect does not free the LLD's \ | |
2165 | * interconnect resources while we are trying to read them. \ | |
2166 | */ \ | |
2167 | mutex_lock(&conn->ep_mutex); \ | |
2168 | ep = conn->ep; \ | |
2169 | if (!ep && t->ep_connect) { \ | |
2170 | mutex_unlock(&conn->ep_mutex); \ | |
2171 | return -ENOTCONN; \ | |
2172 | } \ | |
2173 | \ | |
2174 | if (ep) \ | |
2175 | rc = t->get_ep_param(ep, param, buf); \ | |
2176 | else \ | |
2177 | rc = t->get_conn_param(conn, param, buf); \ | |
2178 | mutex_unlock(&conn->ep_mutex); \ | |
2179 | return rc; \ | |
2180 | } | |
2181 | ||
2182 | #define iscsi_conn_ep_attr(field, param) \ | |
2183 | iscsi_conn_ep_attr_show(param) \ | |
2184 | static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \ | |
2185 | show_conn_ep_param_##param, NULL); | |
2186 | ||
2187 | iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS); | |
2188 | iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT); | |
2189 | ||
3128c6c7 MC |
2190 | static struct attribute *iscsi_conn_attrs[] = { |
2191 | &dev_attr_conn_max_recv_dlength.attr, | |
2192 | &dev_attr_conn_max_xmit_dlength.attr, | |
2193 | &dev_attr_conn_header_digest.attr, | |
2194 | &dev_attr_conn_data_digest.attr, | |
2195 | &dev_attr_conn_ifmarker.attr, | |
2196 | &dev_attr_conn_ofmarker.attr, | |
2197 | &dev_attr_conn_address.attr, | |
2198 | &dev_attr_conn_port.attr, | |
2199 | &dev_attr_conn_exp_statsn.attr, | |
2200 | &dev_attr_conn_persistent_address.attr, | |
2201 | &dev_attr_conn_persistent_port.attr, | |
2202 | &dev_attr_conn_ping_tmo.attr, | |
2203 | &dev_attr_conn_recv_tmo.attr, | |
2204 | NULL, | |
2205 | }; | |
2206 | ||
587a1f16 | 2207 | static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj, |
3128c6c7 MC |
2208 | struct attribute *attr, int i) |
2209 | { | |
2210 | struct device *cdev = container_of(kobj, struct device, kobj); | |
2211 | struct iscsi_cls_conn *conn = transport_class_to_conn(cdev); | |
2212 | struct iscsi_transport *t = conn->transport; | |
2213 | int param; | |
2214 | ||
2215 | if (attr == &dev_attr_conn_max_recv_dlength.attr) | |
2216 | param = ISCSI_PARAM_MAX_RECV_DLENGTH; | |
2217 | else if (attr == &dev_attr_conn_max_xmit_dlength.attr) | |
2218 | param = ISCSI_PARAM_MAX_XMIT_DLENGTH; | |
2219 | else if (attr == &dev_attr_conn_header_digest.attr) | |
2220 | param = ISCSI_PARAM_HDRDGST_EN; | |
2221 | else if (attr == &dev_attr_conn_data_digest.attr) | |
2222 | param = ISCSI_PARAM_DATADGST_EN; | |
2223 | else if (attr == &dev_attr_conn_ifmarker.attr) | |
2224 | param = ISCSI_PARAM_IFMARKER_EN; | |
2225 | else if (attr == &dev_attr_conn_ofmarker.attr) | |
2226 | param = ISCSI_PARAM_OFMARKER_EN; | |
2227 | else if (attr == &dev_attr_conn_address.attr) | |
2228 | param = ISCSI_PARAM_CONN_ADDRESS; | |
2229 | else if (attr == &dev_attr_conn_port.attr) | |
2230 | param = ISCSI_PARAM_CONN_PORT; | |
2231 | else if (attr == &dev_attr_conn_exp_statsn.attr) | |
2232 | param = ISCSI_PARAM_EXP_STATSN; | |
2233 | else if (attr == &dev_attr_conn_persistent_address.attr) | |
2234 | param = ISCSI_PARAM_PERSISTENT_ADDRESS; | |
2235 | else if (attr == &dev_attr_conn_persistent_port.attr) | |
2236 | param = ISCSI_PARAM_PERSISTENT_PORT; | |
2237 | else if (attr == &dev_attr_conn_ping_tmo.attr) | |
2238 | param = ISCSI_PARAM_PING_TMO; | |
2239 | else if (attr == &dev_attr_conn_recv_tmo.attr) | |
2240 | param = ISCSI_PARAM_RECV_TMO; | |
2241 | else { | |
2242 | WARN_ONCE(1, "Invalid conn attr"); | |
2243 | return 0; | |
2244 | } | |
2245 | ||
2246 | return t->attr_is_visible(ISCSI_PARAM, param); | |
2247 | } | |
2248 | ||
2249 | static struct attribute_group iscsi_conn_group = { | |
2250 | .attrs = iscsi_conn_attrs, | |
2251 | .is_visible = iscsi_conn_attr_is_visible, | |
2252 | }; | |
2253 | ||
1da177e4 | 2254 | /* |
0896b752 | 2255 | * iSCSI session attrs |
1da177e4 | 2256 | */ |
b2c64167 | 2257 | #define iscsi_session_attr_show(param, perm) \ |
fd7255f5 | 2258 | static ssize_t \ |
ee959b00 TJ |
2259 | show_session_param_##param(struct device *dev, \ |
2260 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 2261 | { \ |
ee959b00 TJ |
2262 | struct iscsi_cls_session *session = \ |
2263 | iscsi_dev_to_session(dev->parent); \ | |
fd7255f5 | 2264 | struct iscsi_transport *t = session->transport; \ |
b2c64167 MC |
2265 | \ |
2266 | if (perm && !capable(CAP_SYS_ADMIN)) \ | |
2267 | return -EACCES; \ | |
a54a52ca | 2268 | return t->get_session_param(session, param, buf); \ |
fd7255f5 MC |
2269 | } |
2270 | ||
b2c64167 MC |
2271 | #define iscsi_session_attr(field, param, perm) \ |
2272 | iscsi_session_attr_show(param, perm) \ | |
a54a52ca | 2273 | static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \ |
fd7255f5 | 2274 | NULL); |
b2c64167 MC |
2275 | iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0); |
2276 | iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0); | |
2277 | iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0); | |
2278 | iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0); | |
2279 | iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0); | |
2280 | iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0); | |
2281 | iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0); | |
2282 | iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0); | |
2283 | iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0); | |
2284 | iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0); | |
2285 | iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1); | |
2286 | iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1); | |
2287 | iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1); | |
2288 | iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1); | |
4cd49ea1 MC |
2289 | iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0); |
2290 | iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0); | |
2291 | iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0); | |
3fe5ae8b | 2292 | iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0); |
88dfd340 | 2293 | iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0); |
3b2bef1f VC |
2294 | iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0); |
2295 | iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0); | |
1da177e4 | 2296 | |
6eabafbe | 2297 | static ssize_t |
ee959b00 TJ |
2298 | show_priv_session_state(struct device *dev, struct device_attribute *attr, |
2299 | char *buf) | |
6eabafbe | 2300 | { |
ee959b00 | 2301 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); |
6eabafbe MC |
2302 | return sprintf(buf, "%s\n", iscsi_session_state_name(session->state)); |
2303 | } | |
2304 | static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state, | |
2305 | NULL); | |
0c70d84b MC |
2306 | static ssize_t |
2307 | show_priv_session_creator(struct device *dev, struct device_attribute *attr, | |
2308 | char *buf) | |
2309 | { | |
2310 | struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent); | |
2311 | return sprintf(buf, "%d\n", session->creator); | |
2312 | } | |
2313 | static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator, | |
2314 | NULL); | |
6eabafbe | 2315 | |
fd7255f5 MC |
2316 | #define iscsi_priv_session_attr_show(field, format) \ |
2317 | static ssize_t \ | |
ee959b00 TJ |
2318 | show_priv_session_##field(struct device *dev, \ |
2319 | struct device_attribute *attr, char *buf) \ | |
fd7255f5 | 2320 | { \ |
ee959b00 TJ |
2321 | struct iscsi_cls_session *session = \ |
2322 | iscsi_dev_to_session(dev->parent); \ | |
fe4f0bde VC |
2323 | if (session->field == -1) \ |
2324 | return sprintf(buf, "off\n"); \ | |
fd7255f5 MC |
2325 | return sprintf(buf, format"\n", session->field); \ |
2326 | } | |
2327 | ||
fe4f0bde VC |
2328 | #define iscsi_priv_session_attr_store(field) \ |
2329 | static ssize_t \ | |
2330 | store_priv_session_##field(struct device *dev, \ | |
2331 | struct device_attribute *attr, \ | |
2332 | const char *buf, size_t count) \ | |
2333 | { \ | |
2334 | int val; \ | |
2335 | char *cp; \ | |
2336 | struct iscsi_cls_session *session = \ | |
2337 | iscsi_dev_to_session(dev->parent); \ | |
2338 | if ((session->state == ISCSI_SESSION_FREE) || \ | |
2339 | (session->state == ISCSI_SESSION_FAILED)) \ | |
2340 | return -EBUSY; \ | |
2341 | if (strncmp(buf, "off", 3) == 0) \ | |
2342 | session->field = -1; \ | |
2343 | else { \ | |
2344 | val = simple_strtoul(buf, &cp, 0); \ | |
2345 | if (*cp != '\0' && *cp != '\n') \ | |
2346 | return -EINVAL; \ | |
2347 | session->field = val; \ | |
2348 | } \ | |
2349 | return count; \ | |
2350 | } | |
2351 | ||
2352 | #define iscsi_priv_session_rw_attr(field, format) \ | |
fd7255f5 | 2353 | iscsi_priv_session_attr_show(field, format) \ |
fe4f0bde | 2354 | iscsi_priv_session_attr_store(field) \ |
523f3c80 | 2355 | static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \ |
fe4f0bde VC |
2356 | show_priv_session_##field, \ |
2357 | store_priv_session_##field) | |
2358 | iscsi_priv_session_rw_attr(recovery_tmo, "%d"); | |
fd7255f5 | 2359 | |
1d063c17 MC |
2360 | static struct attribute *iscsi_session_attrs[] = { |
2361 | &dev_attr_sess_initial_r2t.attr, | |
2362 | &dev_attr_sess_max_outstanding_r2t.attr, | |
2363 | &dev_attr_sess_immediate_data.attr, | |
2364 | &dev_attr_sess_first_burst_len.attr, | |
2365 | &dev_attr_sess_max_burst_len.attr, | |
2366 | &dev_attr_sess_data_pdu_in_order.attr, | |
2367 | &dev_attr_sess_data_seq_in_order.attr, | |
2368 | &dev_attr_sess_erl.attr, | |
2369 | &dev_attr_sess_targetname.attr, | |
2370 | &dev_attr_sess_tpgt.attr, | |
2371 | &dev_attr_sess_password.attr, | |
2372 | &dev_attr_sess_password_in.attr, | |
2373 | &dev_attr_sess_username.attr, | |
2374 | &dev_attr_sess_username_in.attr, | |
2375 | &dev_attr_sess_fast_abort.attr, | |
2376 | &dev_attr_sess_abort_tmo.attr, | |
2377 | &dev_attr_sess_lu_reset_tmo.attr, | |
2378 | &dev_attr_sess_tgt_reset_tmo.attr, | |
2379 | &dev_attr_sess_ifacename.attr, | |
2380 | &dev_attr_sess_initiatorname.attr, | |
2381 | &dev_attr_sess_targetalias.attr, | |
2382 | &dev_attr_priv_sess_recovery_tmo.attr, | |
2383 | &dev_attr_priv_sess_state.attr, | |
0c70d84b | 2384 | &dev_attr_priv_sess_creator.attr, |
1d063c17 MC |
2385 | NULL, |
2386 | }; | |
2387 | ||
587a1f16 | 2388 | static umode_t iscsi_session_attr_is_visible(struct kobject *kobj, |
1d063c17 MC |
2389 | struct attribute *attr, int i) |
2390 | { | |
2391 | struct device *cdev = container_of(kobj, struct device, kobj); | |
2392 | struct iscsi_cls_session *session = transport_class_to_session(cdev); | |
2393 | struct iscsi_transport *t = session->transport; | |
2394 | int param; | |
2395 | ||
2396 | if (attr == &dev_attr_sess_initial_r2t.attr) | |
2397 | param = ISCSI_PARAM_INITIAL_R2T_EN; | |
2398 | else if (attr == &dev_attr_sess_max_outstanding_r2t.attr) | |
2399 | param = ISCSI_PARAM_MAX_R2T; | |
2400 | else if (attr == &dev_attr_sess_immediate_data.attr) | |
2401 | param = ISCSI_PARAM_IMM_DATA_EN; | |
2402 | else if (attr == &dev_attr_sess_first_burst_len.attr) | |
2403 | param = ISCSI_PARAM_FIRST_BURST; | |
2404 | else if (attr == &dev_attr_sess_max_burst_len.attr) | |
2405 | param = ISCSI_PARAM_MAX_BURST; | |
2406 | else if (attr == &dev_attr_sess_data_pdu_in_order.attr) | |
2407 | param = ISCSI_PARAM_PDU_INORDER_EN; | |
2408 | else if (attr == &dev_attr_sess_data_seq_in_order.attr) | |
2409 | param = ISCSI_PARAM_DATASEQ_INORDER_EN; | |
2410 | else if (attr == &dev_attr_sess_erl.attr) | |
2411 | param = ISCSI_PARAM_ERL; | |
2412 | else if (attr == &dev_attr_sess_targetname.attr) | |
2413 | param = ISCSI_PARAM_TARGET_NAME; | |
2414 | else if (attr == &dev_attr_sess_tpgt.attr) | |
2415 | param = ISCSI_PARAM_TPGT; | |
2416 | else if (attr == &dev_attr_sess_password.attr) | |
2417 | param = ISCSI_PARAM_USERNAME; | |
2418 | else if (attr == &dev_attr_sess_password_in.attr) | |
2419 | param = ISCSI_PARAM_USERNAME_IN; | |
2420 | else if (attr == &dev_attr_sess_username.attr) | |
2421 | param = ISCSI_PARAM_PASSWORD; | |
2422 | else if (attr == &dev_attr_sess_username_in.attr) | |
2423 | param = ISCSI_PARAM_PASSWORD_IN; | |
2424 | else if (attr == &dev_attr_sess_fast_abort.attr) | |
2425 | param = ISCSI_PARAM_FAST_ABORT; | |
2426 | else if (attr == &dev_attr_sess_abort_tmo.attr) | |
2427 | param = ISCSI_PARAM_ABORT_TMO; | |
2428 | else if (attr == &dev_attr_sess_lu_reset_tmo.attr) | |
2429 | param = ISCSI_PARAM_LU_RESET_TMO; | |
2430 | else if (attr == &dev_attr_sess_tgt_reset_tmo.attr) | |
2431 | param = ISCSI_PARAM_TGT_RESET_TMO; | |
2432 | else if (attr == &dev_attr_sess_ifacename.attr) | |
2433 | param = ISCSI_PARAM_IFACE_NAME; | |
2434 | else if (attr == &dev_attr_sess_initiatorname.attr) | |
2435 | param = ISCSI_PARAM_INITIATOR_NAME; | |
2436 | else if (attr == &dev_attr_sess_targetalias.attr) | |
2437 | param = ISCSI_PARAM_TARGET_ALIAS; | |
2438 | else if (attr == &dev_attr_priv_sess_recovery_tmo.attr) | |
2439 | return S_IRUGO | S_IWUSR; | |
2440 | else if (attr == &dev_attr_priv_sess_state.attr) | |
2441 | return S_IRUGO; | |
0c70d84b MC |
2442 | else if (attr == &dev_attr_priv_sess_creator.attr) |
2443 | return S_IRUGO; | |
1d063c17 MC |
2444 | else { |
2445 | WARN_ONCE(1, "Invalid session attr"); | |
2446 | return 0; | |
2447 | } | |
2448 | ||
2449 | return t->attr_is_visible(ISCSI_PARAM, param); | |
2450 | } | |
2451 | ||
2452 | static struct attribute_group iscsi_session_group = { | |
2453 | .attrs = iscsi_session_attrs, | |
2454 | .is_visible = iscsi_session_attr_is_visible, | |
2455 | }; | |
2456 | ||
1819dc81 MC |
2457 | /* |
2458 | * iSCSI host attrs | |
2459 | */ | |
2460 | #define iscsi_host_attr_show(param) \ | |
2461 | static ssize_t \ | |
ee959b00 TJ |
2462 | show_host_param_##param(struct device *dev, \ |
2463 | struct device_attribute *attr, char *buf) \ | |
1819dc81 | 2464 | { \ |
ee959b00 | 2465 | struct Scsi_Host *shost = transport_class_to_shost(dev); \ |
1819dc81 MC |
2466 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \ |
2467 | return priv->iscsi_transport->get_host_param(shost, param, buf); \ | |
2468 | } | |
2469 | ||
2470 | #define iscsi_host_attr(field, param) \ | |
2471 | iscsi_host_attr_show(param) \ | |
2472 | static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \ | |
2473 | NULL); | |
2474 | ||
d8196ed2 | 2475 | iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME); |
1819dc81 | 2476 | iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS); |
d8196ed2 | 2477 | iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS); |
8ad5781a | 2478 | iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME); |
1819dc81 | 2479 | |
f27fb2ef MC |
2480 | static struct attribute *iscsi_host_attrs[] = { |
2481 | &dev_attr_host_netdev.attr, | |
2482 | &dev_attr_host_hwaddress.attr, | |
2483 | &dev_attr_host_ipaddress.attr, | |
2484 | &dev_attr_host_initiatorname.attr, | |
2485 | NULL, | |
2486 | }; | |
2487 | ||
587a1f16 | 2488 | static umode_t iscsi_host_attr_is_visible(struct kobject *kobj, |
f27fb2ef MC |
2489 | struct attribute *attr, int i) |
2490 | { | |
2491 | struct device *cdev = container_of(kobj, struct device, kobj); | |
2492 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
2493 | struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); | |
2494 | int param; | |
2495 | ||
2496 | if (attr == &dev_attr_host_netdev.attr) | |
2497 | param = ISCSI_HOST_PARAM_NETDEV_NAME; | |
2498 | else if (attr == &dev_attr_host_hwaddress.attr) | |
2499 | param = ISCSI_HOST_PARAM_HWADDRESS; | |
2500 | else if (attr == &dev_attr_host_ipaddress.attr) | |
2501 | param = ISCSI_HOST_PARAM_IPADDRESS; | |
2502 | else if (attr == &dev_attr_host_initiatorname.attr) | |
2503 | param = ISCSI_HOST_PARAM_INITIATOR_NAME; | |
2504 | else { | |
2505 | WARN_ONCE(1, "Invalid host attr"); | |
2506 | return 0; | |
2507 | } | |
2508 | ||
2509 | return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param); | |
2510 | } | |
2511 | ||
2512 | static struct attribute_group iscsi_host_group = { | |
2513 | .attrs = iscsi_host_attrs, | |
2514 | .is_visible = iscsi_host_attr_is_visible, | |
2515 | }; | |
1819dc81 | 2516 | |
0896b752 AA |
2517 | static int iscsi_session_match(struct attribute_container *cont, |
2518 | struct device *dev) | |
1da177e4 | 2519 | { |
7b8631b5 | 2520 | struct iscsi_cls_session *session; |
1da177e4 | 2521 | struct Scsi_Host *shost; |
0896b752 AA |
2522 | struct iscsi_internal *priv; |
2523 | ||
2524 | if (!iscsi_is_session_dev(dev)) | |
2525 | return 0; | |
1da177e4 | 2526 | |
7b8631b5 MC |
2527 | session = iscsi_dev_to_session(dev); |
2528 | shost = iscsi_session_to_shost(session); | |
0896b752 | 2529 | if (!shost->transportt) |
1da177e4 LT |
2530 | return 0; |
2531 | ||
0896b752 AA |
2532 | priv = to_iscsi_internal(shost->transportt); |
2533 | if (priv->session_cont.ac.class != &iscsi_session_class.class) | |
1da177e4 LT |
2534 | return 0; |
2535 | ||
0896b752 | 2536 | return &priv->session_cont.ac == cont; |
1da177e4 LT |
2537 | } |
2538 | ||
0896b752 AA |
2539 | static int iscsi_conn_match(struct attribute_container *cont, |
2540 | struct device *dev) | |
2541 | { | |
7b8631b5 MC |
2542 | struct iscsi_cls_session *session; |
2543 | struct iscsi_cls_conn *conn; | |
1da177e4 | 2544 | struct Scsi_Host *shost; |
0896b752 | 2545 | struct iscsi_internal *priv; |
1da177e4 | 2546 | |
0896b752 | 2547 | if (!iscsi_is_conn_dev(dev)) |
1da177e4 LT |
2548 | return 0; |
2549 | ||
7b8631b5 MC |
2550 | conn = iscsi_dev_to_conn(dev); |
2551 | session = iscsi_dev_to_session(conn->dev.parent); | |
2552 | shost = iscsi_session_to_shost(session); | |
2553 | ||
0896b752 | 2554 | if (!shost->transportt) |
1da177e4 LT |
2555 | return 0; |
2556 | ||
0896b752 AA |
2557 | priv = to_iscsi_internal(shost->transportt); |
2558 | if (priv->conn_cont.ac.class != &iscsi_connection_class.class) | |
2559 | return 0; | |
1da177e4 | 2560 | |
0896b752 AA |
2561 | return &priv->conn_cont.ac == cont; |
2562 | } | |
2563 | ||
30a6c652 MC |
2564 | static int iscsi_host_match(struct attribute_container *cont, |
2565 | struct device *dev) | |
2566 | { | |
2567 | struct Scsi_Host *shost; | |
2568 | struct iscsi_internal *priv; | |
2569 | ||
2570 | if (!scsi_is_host_device(dev)) | |
2571 | return 0; | |
2572 | ||
2573 | shost = dev_to_shost(dev); | |
2574 | if (!shost->transportt || | |
2575 | shost->transportt->host_attrs.ac.class != &iscsi_host_class.class) | |
2576 | return 0; | |
2577 | ||
2578 | priv = to_iscsi_internal(shost->transportt); | |
2579 | return &priv->t.host_attrs.ac == cont; | |
2580 | } | |
2581 | ||
7b8631b5 MC |
2582 | struct scsi_transport_template * |
2583 | iscsi_register_transport(struct iscsi_transport *tt) | |
0896b752 AA |
2584 | { |
2585 | struct iscsi_internal *priv; | |
2586 | unsigned long flags; | |
f27fb2ef | 2587 | int err; |
0896b752 AA |
2588 | |
2589 | BUG_ON(!tt); | |
2590 | ||
2591 | priv = iscsi_if_transport_lookup(tt); | |
2592 | if (priv) | |
7b8631b5 | 2593 | return NULL; |
0896b752 | 2594 | |
24669f75 | 2595 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
0896b752 | 2596 | if (!priv) |
7b8631b5 | 2597 | return NULL; |
0896b752 | 2598 | INIT_LIST_HEAD(&priv->list); |
0896b752 | 2599 | priv->iscsi_transport = tt; |
30a6c652 | 2600 | priv->t.user_scan = iscsi_user_scan; |
06d25af4 | 2601 | priv->t.create_work_queue = 1; |
0896b752 | 2602 | |
ee959b00 | 2603 | priv->dev.class = &iscsi_transport_class; |
71610f55 | 2604 | dev_set_name(&priv->dev, "%s", tt->name); |
ee959b00 | 2605 | err = device_register(&priv->dev); |
0896b752 AA |
2606 | if (err) |
2607 | goto free_priv; | |
2608 | ||
ee959b00 | 2609 | err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group); |
0896b752 | 2610 | if (err) |
ee959b00 | 2611 | goto unregister_dev; |
0896b752 | 2612 | |
30a6c652 | 2613 | /* host parameters */ |
30a6c652 MC |
2614 | priv->t.host_attrs.ac.class = &iscsi_host_class.class; |
2615 | priv->t.host_attrs.ac.match = iscsi_host_match; | |
f27fb2ef | 2616 | priv->t.host_attrs.ac.grp = &iscsi_host_group; |
32c6e1b9 | 2617 | priv->t.host_size = sizeof(struct iscsi_cls_host); |
30a6c652 MC |
2618 | transport_container_register(&priv->t.host_attrs); |
2619 | ||
0896b752 | 2620 | /* connection parameters */ |
0896b752 AA |
2621 | priv->conn_cont.ac.class = &iscsi_connection_class.class; |
2622 | priv->conn_cont.ac.match = iscsi_conn_match; | |
3128c6c7 | 2623 | priv->conn_cont.ac.grp = &iscsi_conn_group; |
0896b752 | 2624 | transport_container_register(&priv->conn_cont); |
1da177e4 | 2625 | |
0896b752 | 2626 | /* session parameters */ |
0896b752 AA |
2627 | priv->session_cont.ac.class = &iscsi_session_class.class; |
2628 | priv->session_cont.ac.match = iscsi_session_match; | |
1d063c17 | 2629 | priv->session_cont.ac.grp = &iscsi_session_group; |
0896b752 AA |
2630 | transport_container_register(&priv->session_cont); |
2631 | ||
0896b752 AA |
2632 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
2633 | list_add(&priv->list, &iscsi_transports); | |
2634 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
2635 | ||
2636 | printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name); | |
7b8631b5 | 2637 | return &priv->t; |
1da177e4 | 2638 | |
ee959b00 TJ |
2639 | unregister_dev: |
2640 | device_unregister(&priv->dev); | |
d82ff9be | 2641 | return NULL; |
0896b752 AA |
2642 | free_priv: |
2643 | kfree(priv); | |
7b8631b5 | 2644 | return NULL; |
1da177e4 | 2645 | } |
0896b752 AA |
2646 | EXPORT_SYMBOL_GPL(iscsi_register_transport); |
2647 | ||
2648 | int iscsi_unregister_transport(struct iscsi_transport *tt) | |
2649 | { | |
2650 | struct iscsi_internal *priv; | |
2651 | unsigned long flags; | |
2652 | ||
2653 | BUG_ON(!tt); | |
2654 | ||
0b950672 | 2655 | mutex_lock(&rx_queue_mutex); |
0896b752 AA |
2656 | |
2657 | priv = iscsi_if_transport_lookup(tt); | |
2658 | BUG_ON (!priv); | |
2659 | ||
0896b752 AA |
2660 | spin_lock_irqsave(&iscsi_transport_lock, flags); |
2661 | list_del(&priv->list); | |
2662 | spin_unlock_irqrestore(&iscsi_transport_lock, flags); | |
2663 | ||
2664 | transport_container_unregister(&priv->conn_cont); | |
2665 | transport_container_unregister(&priv->session_cont); | |
30a6c652 | 2666 | transport_container_unregister(&priv->t.host_attrs); |
0896b752 | 2667 | |
ee959b00 TJ |
2668 | sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group); |
2669 | device_unregister(&priv->dev); | |
0b950672 | 2670 | mutex_unlock(&rx_queue_mutex); |
1da177e4 | 2671 | |
0896b752 AA |
2672 | return 0; |
2673 | } | |
2674 | EXPORT_SYMBOL_GPL(iscsi_unregister_transport); | |
1da177e4 | 2675 | |
1da177e4 LT |
2676 | static __init int iscsi_transport_init(void) |
2677 | { | |
0896b752 | 2678 | int err; |
1da177e4 | 2679 | |
09492605 | 2680 | printk(KERN_INFO "Loading iSCSI transport class v%s.\n", |
f4246b33 MC |
2681 | ISCSI_TRANSPORT_VERSION); |
2682 | ||
41be1444 MC |
2683 | atomic_set(&iscsi_session_nr, 0); |
2684 | ||
0896b752 | 2685 | err = class_register(&iscsi_transport_class); |
1da177e4 LT |
2686 | if (err) |
2687 | return err; | |
0896b752 | 2688 | |
d82ff9be | 2689 | err = class_register(&iscsi_endpoint_class); |
0896b752 AA |
2690 | if (err) |
2691 | goto unregister_transport_class; | |
2692 | ||
8d07913d | 2693 | err = class_register(&iscsi_iface_class); |
d82ff9be MC |
2694 | if (err) |
2695 | goto unregister_endpoint_class; | |
2696 | ||
8d07913d MC |
2697 | err = transport_class_register(&iscsi_host_class); |
2698 | if (err) | |
2699 | goto unregister_iface_class; | |
2700 | ||
30a6c652 MC |
2701 | err = transport_class_register(&iscsi_connection_class); |
2702 | if (err) | |
2703 | goto unregister_host_class; | |
2704 | ||
0896b752 AA |
2705 | err = transport_class_register(&iscsi_session_class); |
2706 | if (err) | |
2707 | goto unregister_conn_class; | |
2708 | ||
d82ff9be MC |
2709 | nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, |
2710 | NULL, THIS_MODULE); | |
0896b752 AA |
2711 | if (!nls) { |
2712 | err = -ENOBUFS; | |
43a145a3 | 2713 | goto unregister_session_class; |
0896b752 AA |
2714 | } |
2715 | ||
d8bf541e MC |
2716 | iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); |
2717 | if (!iscsi_eh_timer_workq) | |
2718 | goto release_nls; | |
2719 | ||
43a145a3 | 2720 | return 0; |
0896b752 | 2721 | |
d8bf541e | 2722 | release_nls: |
b7c6ba6e | 2723 | netlink_kernel_release(nls); |
0896b752 AA |
2724 | unregister_session_class: |
2725 | transport_class_unregister(&iscsi_session_class); | |
2726 | unregister_conn_class: | |
2727 | transport_class_unregister(&iscsi_connection_class); | |
30a6c652 MC |
2728 | unregister_host_class: |
2729 | transport_class_unregister(&iscsi_host_class); | |
8d07913d MC |
2730 | unregister_iface_class: |
2731 | class_unregister(&iscsi_iface_class); | |
d82ff9be MC |
2732 | unregister_endpoint_class: |
2733 | class_unregister(&iscsi_endpoint_class); | |
0896b752 AA |
2734 | unregister_transport_class: |
2735 | class_unregister(&iscsi_transport_class); | |
2736 | return err; | |
1da177e4 LT |
2737 | } |
2738 | ||
2739 | static void __exit iscsi_transport_exit(void) | |
2740 | { | |
d8bf541e | 2741 | destroy_workqueue(iscsi_eh_timer_workq); |
b7c6ba6e | 2742 | netlink_kernel_release(nls); |
0896b752 AA |
2743 | transport_class_unregister(&iscsi_connection_class); |
2744 | transport_class_unregister(&iscsi_session_class); | |
30a6c652 | 2745 | transport_class_unregister(&iscsi_host_class); |
d82ff9be | 2746 | class_unregister(&iscsi_endpoint_class); |
8d07913d | 2747 | class_unregister(&iscsi_iface_class); |
0896b752 | 2748 | class_unregister(&iscsi_transport_class); |
1da177e4 LT |
2749 | } |
2750 | ||
2751 | module_init(iscsi_transport_init); | |
2752 | module_exit(iscsi_transport_exit); | |
2753 | ||
0896b752 AA |
2754 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
2755 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
2756 | "Alex Aizman <itn780@yahoo.com>"); | |
2757 | MODULE_DESCRIPTION("iSCSI Transport Interface"); | |
1da177e4 | 2758 | MODULE_LICENSE("GPL"); |
f4246b33 | 2759 | MODULE_VERSION(ISCSI_TRANSPORT_VERSION); |
058548ae | 2760 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI); |