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