2 * iSCSI transport class definitions
4 * Copyright (C) IBM Corporation, 2004
5 * Copyright (C) Mike Christie, 2004 - 2005
6 * Copyright (C) Dmitry Yusupov, 2004 - 2005
7 * Copyright (C) Alex Aizman, 2004 - 2005
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.
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.
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.
23 #include <linux/module.h>
24 #include <linux/mutex.h>
26 #include <scsi/scsi.h>
27 #include <scsi/scsi_host.h>
28 #include <scsi/scsi_device.h>
29 #include <scsi/scsi_transport.h>
30 #include <scsi/scsi_transport_iscsi.h>
31 #include <scsi/iscsi_if.h>
33 #define ISCSI_SESSION_ATTRS 11
34 #define ISCSI_CONN_ATTRS 11
35 #define ISCSI_HOST_ATTRS 0
36 #define ISCSI_TRANSPORT_VERSION "2.0-724"
38 struct iscsi_internal
{
40 struct scsi_transport_template t
;
41 struct iscsi_transport
*iscsi_transport
;
42 struct list_head list
;
43 struct class_device cdev
;
45 struct class_device_attribute
*host_attrs
[ISCSI_HOST_ATTRS
+ 1];
46 struct transport_container conn_cont
;
47 struct class_device_attribute
*conn_attrs
[ISCSI_CONN_ATTRS
+ 1];
48 struct transport_container session_cont
;
49 struct class_device_attribute
*session_attrs
[ISCSI_SESSION_ATTRS
+ 1];
52 static int iscsi_session_nr
; /* sysfs session id for next new session */
55 * list of registered transports and lock that must
56 * be held while accessing list. The iscsi_transport_lock must
57 * be acquired after the rx_queue_mutex.
59 static LIST_HEAD(iscsi_transports
);
60 static DEFINE_SPINLOCK(iscsi_transport_lock
);
62 #define to_iscsi_internal(tmpl) \
63 container_of(tmpl, struct iscsi_internal, t)
65 #define cdev_to_iscsi_internal(_cdev) \
66 container_of(_cdev, struct iscsi_internal, cdev)
68 static void iscsi_transport_release(struct class_device
*cdev
)
70 struct iscsi_internal
*priv
= cdev_to_iscsi_internal(cdev
);
75 * iscsi_transport_class represents the iscsi_transports that are
78 static struct class iscsi_transport_class
= {
79 .name
= "iscsi_transport",
80 .release
= iscsi_transport_release
,
84 show_transport_handle(struct class_device
*cdev
, char *buf
)
86 struct iscsi_internal
*priv
= cdev_to_iscsi_internal(cdev
);
87 return sprintf(buf
, "%llu\n", (unsigned long long)iscsi_handle(priv
->iscsi_transport
));
89 static CLASS_DEVICE_ATTR(handle
, S_IRUGO
, show_transport_handle
, NULL
);
91 #define show_transport_attr(name, format) \
93 show_transport_##name(struct class_device *cdev, char *buf) \
95 struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); \
96 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
98 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
100 show_transport_attr(caps
, "0x%x");
101 show_transport_attr(max_lun
, "%d");
102 show_transport_attr(max_conn
, "%d");
103 show_transport_attr(max_cmd_len
, "%d");
105 static struct attribute
*iscsi_transport_attrs
[] = {
106 &class_device_attr_handle
.attr
,
107 &class_device_attr_caps
.attr
,
108 &class_device_attr_max_lun
.attr
,
109 &class_device_attr_max_conn
.attr
,
110 &class_device_attr_max_cmd_len
.attr
,
114 static struct attribute_group iscsi_transport_group
= {
115 .attrs
= iscsi_transport_attrs
,
118 static int iscsi_setup_host(struct transport_container
*tc
, struct device
*dev
,
119 struct class_device
*cdev
)
121 struct Scsi_Host
*shost
= dev_to_shost(dev
);
122 struct iscsi_host
*ihost
= shost
->shost_data
;
124 memset(ihost
, 0, sizeof(*ihost
));
125 INIT_LIST_HEAD(&ihost
->sessions
);
126 mutex_init(&ihost
->mutex
);
130 static DECLARE_TRANSPORT_CLASS(iscsi_host_class
,
136 static DECLARE_TRANSPORT_CLASS(iscsi_session_class
,
142 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class
,
148 static struct sock
*nls
;
149 static DEFINE_MUTEX(rx_queue_mutex
);
151 static LIST_HEAD(sesslist
);
152 static DEFINE_SPINLOCK(sesslock
);
153 static LIST_HEAD(connlist
);
154 static DEFINE_SPINLOCK(connlock
);
156 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn
*conn
)
158 struct iscsi_cls_session
*sess
= iscsi_dev_to_session(conn
->dev
.parent
);
163 * Returns the matching session to a given sid
165 static struct iscsi_cls_session
*iscsi_session_lookup(uint32_t sid
)
168 struct iscsi_cls_session
*sess
;
170 spin_lock_irqsave(&sesslock
, flags
);
171 list_for_each_entry(sess
, &sesslist
, sess_list
) {
172 if (sess
->sid
== sid
) {
173 spin_unlock_irqrestore(&sesslock
, flags
);
177 spin_unlock_irqrestore(&sesslock
, flags
);
182 * Returns the matching connection to a given sid / cid tuple
184 static struct iscsi_cls_conn
*iscsi_conn_lookup(uint32_t sid
, uint32_t cid
)
187 struct iscsi_cls_conn
*conn
;
189 spin_lock_irqsave(&connlock
, flags
);
190 list_for_each_entry(conn
, &connlist
, conn_list
) {
191 if ((conn
->cid
== cid
) && (iscsi_conn_get_sid(conn
) == sid
)) {
192 spin_unlock_irqrestore(&connlock
, flags
);
196 spin_unlock_irqrestore(&connlock
, flags
);
201 * The following functions can be used by LLDs that allocate
202 * their own scsi_hosts or by software iscsi LLDs
204 static void iscsi_session_release(struct device
*dev
)
206 struct iscsi_cls_session
*session
= iscsi_dev_to_session(dev
);
207 struct Scsi_Host
*shost
;
209 shost
= iscsi_session_to_shost(session
);
210 scsi_host_put(shost
);
214 static int iscsi_is_session_dev(const struct device
*dev
)
216 return dev
->release
== iscsi_session_release
;
219 static int iscsi_user_scan(struct Scsi_Host
*shost
, uint channel
,
222 struct iscsi_host
*ihost
= shost
->shost_data
;
223 struct iscsi_cls_session
*session
;
225 mutex_lock(&ihost
->mutex
);
226 list_for_each_entry(session
, &ihost
->sessions
, host_list
) {
227 if ((channel
== SCAN_WILD_CARD
|| channel
== 0) &&
228 (id
== SCAN_WILD_CARD
|| id
== session
->target_id
))
229 scsi_scan_target(&session
->dev
, 0,
230 session
->target_id
, lun
, 1);
232 mutex_unlock(&ihost
->mutex
);
237 static void session_recovery_timedout(void *data
)
239 struct iscsi_cls_session
*session
= data
;
241 dev_printk(KERN_INFO
, &session
->dev
, "iscsi: session recovery timed "
242 "out after %d secs\n", session
->recovery_tmo
);
244 if (session
->transport
->session_recovery_timedout
)
245 session
->transport
->session_recovery_timedout(session
);
247 scsi_target_unblock(&session
->dev
);
250 void iscsi_unblock_session(struct iscsi_cls_session
*session
)
252 if (!cancel_delayed_work(&session
->recovery_work
))
253 flush_scheduled_work();
254 scsi_target_unblock(&session
->dev
);
256 EXPORT_SYMBOL_GPL(iscsi_unblock_session
);
258 void iscsi_block_session(struct iscsi_cls_session
*session
)
260 scsi_target_block(&session
->dev
);
261 schedule_delayed_work(&session
->recovery_work
,
262 session
->recovery_tmo
* HZ
);
264 EXPORT_SYMBOL_GPL(iscsi_block_session
);
266 struct iscsi_cls_session
*
267 iscsi_alloc_session(struct Scsi_Host
*shost
,
268 struct iscsi_transport
*transport
)
270 struct iscsi_cls_session
*session
;
272 session
= kzalloc(sizeof(*session
) + transport
->sessiondata_size
,
277 session
->transport
= transport
;
278 session
->recovery_tmo
= 120;
279 INIT_WORK(&session
->recovery_work
, session_recovery_timedout
, session
);
280 INIT_LIST_HEAD(&session
->host_list
);
281 INIT_LIST_HEAD(&session
->sess_list
);
283 /* this is released in the dev's release function */
284 scsi_host_get(shost
);
285 session
->dev
.parent
= &shost
->shost_gendev
;
286 session
->dev
.release
= iscsi_session_release
;
287 device_initialize(&session
->dev
);
288 if (transport
->sessiondata_size
)
289 session
->dd_data
= &session
[1];
292 EXPORT_SYMBOL_GPL(iscsi_alloc_session
);
294 int iscsi_add_session(struct iscsi_cls_session
*session
, unsigned int target_id
)
296 struct Scsi_Host
*shost
= iscsi_session_to_shost(session
);
297 struct iscsi_host
*ihost
;
300 ihost
= shost
->shost_data
;
301 session
->sid
= iscsi_session_nr
++;
302 session
->target_id
= target_id
;
304 snprintf(session
->dev
.bus_id
, BUS_ID_SIZE
, "session%u",
306 err
= device_add(&session
->dev
);
308 dev_printk(KERN_ERR
, &session
->dev
, "iscsi: could not "
309 "register session's dev\n");
312 transport_register_device(&session
->dev
);
314 mutex_lock(&ihost
->mutex
);
315 list_add(&session
->host_list
, &ihost
->sessions
);
316 mutex_unlock(&ihost
->mutex
);
320 scsi_host_put(shost
);
323 EXPORT_SYMBOL_GPL(iscsi_add_session
);
326 * iscsi_create_session - create iscsi class session
328 * @transport: iscsi transport
330 * This can be called from a LLD or iscsi_transport.
332 struct iscsi_cls_session
*
333 iscsi_create_session(struct Scsi_Host
*shost
,
334 struct iscsi_transport
*transport
,
335 unsigned int target_id
)
337 struct iscsi_cls_session
*session
;
339 session
= iscsi_alloc_session(shost
, transport
);
343 if (iscsi_add_session(session
, target_id
)) {
344 iscsi_free_session(session
);
349 EXPORT_SYMBOL_GPL(iscsi_create_session
);
351 void iscsi_remove_session(struct iscsi_cls_session
*session
)
353 struct Scsi_Host
*shost
= iscsi_session_to_shost(session
);
354 struct iscsi_host
*ihost
= shost
->shost_data
;
356 if (!cancel_delayed_work(&session
->recovery_work
))
357 flush_scheduled_work();
359 mutex_lock(&ihost
->mutex
);
360 list_del(&session
->host_list
);
361 mutex_unlock(&ihost
->mutex
);
363 scsi_remove_target(&session
->dev
);
365 transport_unregister_device(&session
->dev
);
366 device_del(&session
->dev
);
368 EXPORT_SYMBOL_GPL(iscsi_remove_session
);
370 void iscsi_free_session(struct iscsi_cls_session
*session
)
372 put_device(&session
->dev
);
375 EXPORT_SYMBOL_GPL(iscsi_free_session
);
378 * iscsi_destroy_session - destroy iscsi session
379 * @session: iscsi_session
381 * Can be called by a LLD or iscsi_transport. There must not be
382 * any running connections.
384 int iscsi_destroy_session(struct iscsi_cls_session
*session
)
386 iscsi_remove_session(session
);
387 iscsi_free_session(session
);
390 EXPORT_SYMBOL_GPL(iscsi_destroy_session
);
392 static void iscsi_conn_release(struct device
*dev
)
394 struct iscsi_cls_conn
*conn
= iscsi_dev_to_conn(dev
);
395 struct device
*parent
= conn
->dev
.parent
;
401 static int iscsi_is_conn_dev(const struct device
*dev
)
403 return dev
->release
== iscsi_conn_release
;
407 * iscsi_create_conn - create iscsi class connection
408 * @session: iscsi cls session
409 * @cid: connection id
411 * This can be called from a LLD or iscsi_transport. The connection
412 * is child of the session so cid must be unique for all connections
415 * Since we do not support MCS, cid will normally be zero. In some cases
416 * for software iscsi we could be trying to preallocate a connection struct
417 * in which case there could be two connection structs and cid would be
420 struct iscsi_cls_conn
*
421 iscsi_create_conn(struct iscsi_cls_session
*session
, uint32_t cid
)
423 struct iscsi_transport
*transport
= session
->transport
;
424 struct iscsi_cls_conn
*conn
;
427 conn
= kzalloc(sizeof(*conn
) + transport
->conndata_size
, GFP_KERNEL
);
431 if (transport
->conndata_size
)
432 conn
->dd_data
= &conn
[1];
434 INIT_LIST_HEAD(&conn
->conn_list
);
435 conn
->transport
= transport
;
438 /* this is released in the dev's release function */
439 if (!get_device(&session
->dev
))
442 snprintf(conn
->dev
.bus_id
, BUS_ID_SIZE
, "connection%d:%u",
444 conn
->dev
.parent
= &session
->dev
;
445 conn
->dev
.release
= iscsi_conn_release
;
446 err
= device_register(&conn
->dev
);
448 dev_printk(KERN_ERR
, &conn
->dev
, "iscsi: could not register "
449 "connection's dev\n");
450 goto release_parent_ref
;
452 transport_register_device(&conn
->dev
);
456 put_device(&session
->dev
);
462 EXPORT_SYMBOL_GPL(iscsi_create_conn
);
465 * iscsi_destroy_conn - destroy iscsi class connection
466 * @session: iscsi cls session
468 * This can be called from a LLD or iscsi_transport.
470 int iscsi_destroy_conn(struct iscsi_cls_conn
*conn
)
472 transport_unregister_device(&conn
->dev
);
473 device_unregister(&conn
->dev
);
477 EXPORT_SYMBOL_GPL(iscsi_destroy_conn
);
480 * iscsi interface functions
482 static struct iscsi_internal
*
483 iscsi_if_transport_lookup(struct iscsi_transport
*tt
)
485 struct iscsi_internal
*priv
;
488 spin_lock_irqsave(&iscsi_transport_lock
, flags
);
489 list_for_each_entry(priv
, &iscsi_transports
, list
) {
490 if (tt
== priv
->iscsi_transport
) {
491 spin_unlock_irqrestore(&iscsi_transport_lock
, flags
);
495 spin_unlock_irqrestore(&iscsi_transport_lock
, flags
);
500 iscsi_broadcast_skb(struct sk_buff
*skb
, gfp_t gfp
)
504 rc
= netlink_broadcast(nls
, skb
, 0, 1, gfp
);
506 printk(KERN_ERR
"iscsi: can not broadcast skb (%d)\n", rc
);
514 iscsi_unicast_skb(struct sk_buff
*skb
, int pid
)
518 rc
= netlink_unicast(nls
, skb
, pid
, MSG_DONTWAIT
);
520 printk(KERN_ERR
"iscsi: can not unicast skb (%d)\n", rc
);
527 int iscsi_recv_pdu(struct iscsi_cls_conn
*conn
, struct iscsi_hdr
*hdr
,
528 char *data
, uint32_t data_size
)
530 struct nlmsghdr
*nlh
;
532 struct iscsi_uevent
*ev
;
534 struct iscsi_internal
*priv
;
535 int len
= NLMSG_SPACE(sizeof(*ev
) + sizeof(struct iscsi_hdr
) +
538 priv
= iscsi_if_transport_lookup(conn
->transport
);
542 skb
= alloc_skb(len
, GFP_ATOMIC
);
544 iscsi_conn_error(conn
, ISCSI_ERR_CONN_FAILED
);
545 dev_printk(KERN_ERR
, &conn
->dev
, "iscsi: can not deliver "
546 "control PDU: OOM\n");
550 nlh
= __nlmsg_put(skb
, priv
->daemon_pid
, 0, 0, (len
- sizeof(*nlh
)), 0);
551 ev
= NLMSG_DATA(nlh
);
552 memset(ev
, 0, sizeof(*ev
));
553 ev
->transport_handle
= iscsi_handle(conn
->transport
);
554 ev
->type
= ISCSI_KEVENT_RECV_PDU
;
555 ev
->r
.recv_req
.cid
= conn
->cid
;
556 ev
->r
.recv_req
.sid
= iscsi_conn_get_sid(conn
);
557 pdu
= (char*)ev
+ sizeof(*ev
);
558 memcpy(pdu
, hdr
, sizeof(struct iscsi_hdr
));
559 memcpy(pdu
+ sizeof(struct iscsi_hdr
), data
, data_size
);
561 return iscsi_unicast_skb(skb
, priv
->daemon_pid
);
563 EXPORT_SYMBOL_GPL(iscsi_recv_pdu
);
565 void iscsi_conn_error(struct iscsi_cls_conn
*conn
, enum iscsi_err error
)
567 struct nlmsghdr
*nlh
;
569 struct iscsi_uevent
*ev
;
570 struct iscsi_internal
*priv
;
571 int len
= NLMSG_SPACE(sizeof(*ev
));
573 priv
= iscsi_if_transport_lookup(conn
->transport
);
577 skb
= alloc_skb(len
, GFP_ATOMIC
);
579 dev_printk(KERN_ERR
, &conn
->dev
, "iscsi: gracefully ignored "
580 "conn error (%d)\n", error
);
584 nlh
= __nlmsg_put(skb
, priv
->daemon_pid
, 0, 0, (len
- sizeof(*nlh
)), 0);
585 ev
= NLMSG_DATA(nlh
);
586 ev
->transport_handle
= iscsi_handle(conn
->transport
);
587 ev
->type
= ISCSI_KEVENT_CONN_ERROR
;
588 ev
->r
.connerror
.error
= error
;
589 ev
->r
.connerror
.cid
= conn
->cid
;
590 ev
->r
.connerror
.sid
= iscsi_conn_get_sid(conn
);
592 iscsi_broadcast_skb(skb
, GFP_ATOMIC
);
594 dev_printk(KERN_INFO
, &conn
->dev
, "iscsi: detected conn error (%d)\n",
597 EXPORT_SYMBOL_GPL(iscsi_conn_error
);
600 iscsi_if_send_reply(int pid
, int seq
, int type
, int done
, int multi
,
601 void *payload
, int size
)
604 struct nlmsghdr
*nlh
;
605 int len
= NLMSG_SPACE(size
);
606 int flags
= multi
? NLM_F_MULTI
: 0;
607 int t
= done
? NLMSG_DONE
: type
;
609 skb
= alloc_skb(len
, GFP_ATOMIC
);
612 * user is supposed to react on iferror == -ENOMEM;
617 nlh
= __nlmsg_put(skb
, pid
, seq
, t
, (len
- sizeof(*nlh
)), 0);
618 nlh
->nlmsg_flags
= flags
;
619 memcpy(NLMSG_DATA(nlh
), payload
, size
);
620 return iscsi_unicast_skb(skb
, pid
);
624 iscsi_if_get_stats(struct iscsi_transport
*transport
, struct nlmsghdr
*nlh
)
626 struct iscsi_uevent
*ev
= NLMSG_DATA(nlh
);
627 struct iscsi_stats
*stats
;
628 struct sk_buff
*skbstat
;
629 struct iscsi_cls_conn
*conn
;
630 struct nlmsghdr
*nlhstat
;
631 struct iscsi_uevent
*evstat
;
632 struct iscsi_internal
*priv
;
633 int len
= NLMSG_SPACE(sizeof(*ev
) +
634 sizeof(struct iscsi_stats
) +
635 sizeof(struct iscsi_stats_custom
) *
636 ISCSI_STATS_CUSTOM_MAX
);
639 priv
= iscsi_if_transport_lookup(transport
);
643 conn
= iscsi_conn_lookup(ev
->u
.get_stats
.sid
, ev
->u
.get_stats
.cid
);
650 skbstat
= alloc_skb(len
, GFP_ATOMIC
);
652 dev_printk(KERN_ERR
, &conn
->dev
, "iscsi: can not "
653 "deliver stats: OOM\n");
657 nlhstat
= __nlmsg_put(skbstat
, priv
->daemon_pid
, 0, 0,
658 (len
- sizeof(*nlhstat
)), 0);
659 evstat
= NLMSG_DATA(nlhstat
);
660 memset(evstat
, 0, sizeof(*evstat
));
661 evstat
->transport_handle
= iscsi_handle(conn
->transport
);
662 evstat
->type
= nlh
->nlmsg_type
;
663 evstat
->u
.get_stats
.cid
=
665 evstat
->u
.get_stats
.sid
=
667 stats
= (struct iscsi_stats
*)
668 ((char*)evstat
+ sizeof(*evstat
));
669 memset(stats
, 0, sizeof(*stats
));
671 transport
->get_stats(conn
, stats
);
672 actual_size
= NLMSG_SPACE(sizeof(struct iscsi_uevent
) +
673 sizeof(struct iscsi_stats
) +
674 sizeof(struct iscsi_stats_custom
) *
675 stats
->custom_length
);
676 actual_size
-= sizeof(*nlhstat
);
677 actual_size
= NLMSG_LENGTH(actual_size
);
678 skb_trim(skbstat
, NLMSG_ALIGN(actual_size
));
679 nlhstat
->nlmsg_len
= actual_size
;
681 err
= iscsi_unicast_skb(skbstat
, priv
->daemon_pid
);
682 } while (err
< 0 && err
!= -ECONNREFUSED
);
688 * iscsi_if_destroy_session_done - send session destr. completion event
689 * @conn: last connection for session
691 * This is called by HW iscsi LLDs to notify userpsace that its HW has
694 int iscsi_if_destroy_session_done(struct iscsi_cls_conn
*conn
)
696 struct iscsi_internal
*priv
;
697 struct iscsi_cls_session
*session
;
698 struct Scsi_Host
*shost
;
699 struct iscsi_uevent
*ev
;
701 struct nlmsghdr
*nlh
;
703 int rc
, len
= NLMSG_SPACE(sizeof(*ev
));
705 priv
= iscsi_if_transport_lookup(conn
->transport
);
709 session
= iscsi_dev_to_session(conn
->dev
.parent
);
710 shost
= iscsi_session_to_shost(session
);
712 skb
= alloc_skb(len
, GFP_KERNEL
);
714 dev_printk(KERN_ERR
, &conn
->dev
, "Cannot notify userspace of "
715 "session creation event\n");
719 nlh
= __nlmsg_put(skb
, priv
->daemon_pid
, 0, 0, (len
- sizeof(*nlh
)), 0);
720 ev
= NLMSG_DATA(nlh
);
721 ev
->transport_handle
= iscsi_handle(conn
->transport
);
722 ev
->type
= ISCSI_KEVENT_DESTROY_SESSION
;
723 ev
->r
.d_session
.host_no
= shost
->host_no
;
724 ev
->r
.d_session
.sid
= session
->sid
;
727 * this will occur if the daemon is not up, so we just warn
728 * the user and when the daemon is restarted it will handle it
730 rc
= iscsi_broadcast_skb(skb
, GFP_KERNEL
);
732 dev_printk(KERN_ERR
, &conn
->dev
, "Cannot notify userspace of "
733 "session destruction event. Check iscsi daemon\n");
735 spin_lock_irqsave(&sesslock
, flags
);
736 list_del(&session
->sess_list
);
737 spin_unlock_irqrestore(&sesslock
, flags
);
739 spin_lock_irqsave(&connlock
, flags
);
741 list_del(&conn
->conn_list
);
742 spin_unlock_irqrestore(&connlock
, flags
);
746 EXPORT_SYMBOL_GPL(iscsi_if_destroy_session_done
);
749 * iscsi_if_create_session_done - send session creation completion event
750 * @conn: leading connection for session
752 * This is called by HW iscsi LLDs to notify userpsace that its HW has
753 * created a session or a existing session is back in the logged in state.
755 int iscsi_if_create_session_done(struct iscsi_cls_conn
*conn
)
757 struct iscsi_internal
*priv
;
758 struct iscsi_cls_session
*session
;
759 struct Scsi_Host
*shost
;
760 struct iscsi_uevent
*ev
;
762 struct nlmsghdr
*nlh
;
764 int rc
, len
= NLMSG_SPACE(sizeof(*ev
));
766 priv
= iscsi_if_transport_lookup(conn
->transport
);
770 session
= iscsi_dev_to_session(conn
->dev
.parent
);
771 shost
= iscsi_session_to_shost(session
);
773 skb
= alloc_skb(len
, GFP_KERNEL
);
775 dev_printk(KERN_ERR
, &conn
->dev
, "Cannot notify userspace of "
776 "session creation event\n");
780 nlh
= __nlmsg_put(skb
, priv
->daemon_pid
, 0, 0, (len
- sizeof(*nlh
)), 0);
781 ev
= NLMSG_DATA(nlh
);
782 ev
->transport_handle
= iscsi_handle(conn
->transport
);
783 ev
->type
= ISCSI_UEVENT_CREATE_SESSION
;
784 ev
->r
.c_session_ret
.host_no
= shost
->host_no
;
785 ev
->r
.c_session_ret
.sid
= session
->sid
;
788 * this will occur if the daemon is not up, so we just warn
789 * the user and when the daemon is restarted it will handle it
791 rc
= iscsi_broadcast_skb(skb
, GFP_KERNEL
);
793 dev_printk(KERN_ERR
, &conn
->dev
, "Cannot notify userspace of "
794 "session creation event. Check iscsi daemon\n");
796 spin_lock_irqsave(&sesslock
, flags
);
797 list_add(&session
->sess_list
, &sesslist
);
798 spin_unlock_irqrestore(&sesslock
, flags
);
800 spin_lock_irqsave(&connlock
, flags
);
801 list_add(&conn
->conn_list
, &connlist
);
803 spin_unlock_irqrestore(&connlock
, flags
);
806 EXPORT_SYMBOL_GPL(iscsi_if_create_session_done
);
809 iscsi_if_create_session(struct iscsi_internal
*priv
, struct iscsi_uevent
*ev
)
811 struct iscsi_transport
*transport
= priv
->iscsi_transport
;
812 struct iscsi_cls_session
*session
;
816 session
= transport
->create_session(transport
, &priv
->t
,
817 ev
->u
.c_session
.initial_cmdsn
,
822 spin_lock_irqsave(&sesslock
, flags
);
823 list_add(&session
->sess_list
, &sesslist
);
824 spin_unlock_irqrestore(&sesslock
, flags
);
826 ev
->r
.c_session_ret
.host_no
= hostno
;
827 ev
->r
.c_session_ret
.sid
= session
->sid
;
832 iscsi_if_create_conn(struct iscsi_transport
*transport
, struct iscsi_uevent
*ev
)
834 struct iscsi_cls_conn
*conn
;
835 struct iscsi_cls_session
*session
;
838 session
= iscsi_session_lookup(ev
->u
.c_conn
.sid
);
840 printk(KERN_ERR
"iscsi: invalid session %d\n",
845 conn
= transport
->create_conn(session
, ev
->u
.c_conn
.cid
);
847 printk(KERN_ERR
"iscsi: couldn't create a new "
848 "connection for session %d\n",
853 ev
->r
.c_conn_ret
.sid
= session
->sid
;
854 ev
->r
.c_conn_ret
.cid
= conn
->cid
;
856 spin_lock_irqsave(&connlock
, flags
);
857 list_add(&conn
->conn_list
, &connlist
);
859 spin_unlock_irqrestore(&connlock
, flags
);
865 iscsi_if_destroy_conn(struct iscsi_transport
*transport
, struct iscsi_uevent
*ev
)
868 struct iscsi_cls_conn
*conn
;
870 conn
= iscsi_conn_lookup(ev
->u
.d_conn
.sid
, ev
->u
.d_conn
.cid
);
873 spin_lock_irqsave(&connlock
, flags
);
875 list_del(&conn
->conn_list
);
876 spin_unlock_irqrestore(&connlock
, flags
);
878 if (transport
->destroy_conn
)
879 transport
->destroy_conn(conn
);
884 iscsi_set_param(struct iscsi_transport
*transport
, struct iscsi_uevent
*ev
)
886 char *data
= (char*)ev
+ sizeof(*ev
);
887 struct iscsi_cls_conn
*conn
;
888 struct iscsi_cls_session
*session
;
889 int err
= 0, value
= 0;
891 session
= iscsi_session_lookup(ev
->u
.set_param
.sid
);
892 conn
= iscsi_conn_lookup(ev
->u
.set_param
.sid
, ev
->u
.set_param
.cid
);
893 if (!conn
|| !session
)
896 switch (ev
->u
.set_param
.param
) {
897 case ISCSI_PARAM_SESS_RECOVERY_TMO
:
898 sscanf(data
, "%d", &value
);
900 session
->recovery_tmo
= value
;
903 err
= transport
->set_param(conn
, ev
->u
.set_param
.param
,
904 data
, ev
->u
.set_param
.len
);
911 iscsi_if_transport_ep(struct iscsi_transport
*transport
,
912 struct iscsi_uevent
*ev
, int msg_type
)
914 struct sockaddr
*dst_addr
;
918 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT
:
919 if (!transport
->ep_connect
)
922 dst_addr
= (struct sockaddr
*)((char*)ev
+ sizeof(*ev
));
923 rc
= transport
->ep_connect(dst_addr
,
924 ev
->u
.ep_connect
.non_blocking
,
925 &ev
->r
.ep_connect_ret
.handle
);
927 case ISCSI_UEVENT_TRANSPORT_EP_POLL
:
928 if (!transport
->ep_poll
)
931 ev
->r
.retcode
= transport
->ep_poll(ev
->u
.ep_poll
.ep_handle
,
932 ev
->u
.ep_poll
.timeout_ms
);
934 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT
:
935 if (!transport
->ep_disconnect
)
938 transport
->ep_disconnect(ev
->u
.ep_disconnect
.ep_handle
);
945 iscsi_tgt_dscvr(struct iscsi_transport
*transport
,
946 struct iscsi_uevent
*ev
)
948 struct sockaddr
*dst_addr
;
950 if (!transport
->tgt_dscvr
)
953 dst_addr
= (struct sockaddr
*)((char*)ev
+ sizeof(*ev
));
954 return transport
->tgt_dscvr(ev
->u
.tgt_dscvr
.type
,
955 ev
->u
.tgt_dscvr
.host_no
,
956 ev
->u
.tgt_dscvr
.enable
, dst_addr
);
960 iscsi_if_recv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
963 struct iscsi_uevent
*ev
= NLMSG_DATA(nlh
);
964 struct iscsi_transport
*transport
= NULL
;
965 struct iscsi_internal
*priv
;
966 struct iscsi_cls_session
*session
;
967 struct iscsi_cls_conn
*conn
;
970 priv
= iscsi_if_transport_lookup(iscsi_ptr(ev
->transport_handle
));
973 transport
= priv
->iscsi_transport
;
975 if (!try_module_get(transport
->owner
))
978 priv
->daemon_pid
= NETLINK_CREDS(skb
)->pid
;
980 switch (nlh
->nlmsg_type
) {
981 case ISCSI_UEVENT_CREATE_SESSION
:
982 err
= iscsi_if_create_session(priv
, ev
);
984 case ISCSI_UEVENT_DESTROY_SESSION
:
985 session
= iscsi_session_lookup(ev
->u
.d_session
.sid
);
987 spin_lock_irqsave(&sesslock
, flags
);
988 list_del(&session
->sess_list
);
989 spin_unlock_irqrestore(&sesslock
, flags
);
991 transport
->destroy_session(session
);
995 case ISCSI_UEVENT_CREATE_CONN
:
996 err
= iscsi_if_create_conn(transport
, ev
);
998 case ISCSI_UEVENT_DESTROY_CONN
:
999 err
= iscsi_if_destroy_conn(transport
, ev
);
1001 case ISCSI_UEVENT_BIND_CONN
:
1002 session
= iscsi_session_lookup(ev
->u
.b_conn
.sid
);
1003 conn
= iscsi_conn_lookup(ev
->u
.b_conn
.sid
, ev
->u
.b_conn
.cid
);
1005 if (session
&& conn
)
1006 ev
->r
.retcode
= transport
->bind_conn(session
, conn
,
1007 ev
->u
.b_conn
.transport_eph
,
1008 ev
->u
.b_conn
.is_leading
);
1012 case ISCSI_UEVENT_SET_PARAM
:
1013 err
= iscsi_set_param(transport
, ev
);
1015 case ISCSI_UEVENT_START_CONN
:
1016 conn
= iscsi_conn_lookup(ev
->u
.start_conn
.sid
, ev
->u
.start_conn
.cid
);
1018 ev
->r
.retcode
= transport
->start_conn(conn
);
1022 case ISCSI_UEVENT_STOP_CONN
:
1023 conn
= iscsi_conn_lookup(ev
->u
.stop_conn
.sid
, ev
->u
.stop_conn
.cid
);
1025 transport
->stop_conn(conn
, ev
->u
.stop_conn
.flag
);
1029 case ISCSI_UEVENT_SEND_PDU
:
1030 conn
= iscsi_conn_lookup(ev
->u
.send_pdu
.sid
, ev
->u
.send_pdu
.cid
);
1032 ev
->r
.retcode
= transport
->send_pdu(conn
,
1033 (struct iscsi_hdr
*)((char*)ev
+ sizeof(*ev
)),
1034 (char*)ev
+ sizeof(*ev
) + ev
->u
.send_pdu
.hdr_size
,
1035 ev
->u
.send_pdu
.data_size
);
1039 case ISCSI_UEVENT_GET_STATS
:
1040 err
= iscsi_if_get_stats(transport
, nlh
);
1042 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT
:
1043 case ISCSI_UEVENT_TRANSPORT_EP_POLL
:
1044 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT
:
1045 err
= iscsi_if_transport_ep(transport
, ev
, nlh
->nlmsg_type
);
1047 case ISCSI_UEVENT_TGT_DSCVR
:
1048 err
= iscsi_tgt_dscvr(transport
, ev
);
1055 module_put(transport
->owner
);
1060 * Get message from skb (based on rtnetlink_rcv_skb). Each message is
1061 * processed by iscsi_if_recv_msg. Malformed skbs with wrong lengths or
1062 * invalid creds are discarded silently.
1065 iscsi_if_rx(struct sock
*sk
, int len
)
1067 struct sk_buff
*skb
;
1069 mutex_lock(&rx_queue_mutex
);
1070 while ((skb
= skb_dequeue(&sk
->sk_receive_queue
)) != NULL
) {
1071 if (NETLINK_CREDS(skb
)->uid
) {
1072 skb_pull(skb
, skb
->len
);
1076 while (skb
->len
>= NLMSG_SPACE(0)) {
1079 struct nlmsghdr
*nlh
;
1080 struct iscsi_uevent
*ev
;
1082 nlh
= (struct nlmsghdr
*)skb
->data
;
1083 if (nlh
->nlmsg_len
< sizeof(*nlh
) ||
1084 skb
->len
< nlh
->nlmsg_len
) {
1088 ev
= NLMSG_DATA(nlh
);
1089 rlen
= NLMSG_ALIGN(nlh
->nlmsg_len
);
1090 if (rlen
> skb
->len
)
1093 err
= iscsi_if_recv_msg(skb
, nlh
);
1095 ev
->type
= ISCSI_KEVENT_IF_ERROR
;
1100 * special case for GET_STATS:
1101 * on success - sending reply and stats from
1102 * inside of if_recv_msg(),
1103 * on error - fall through.
1105 if (ev
->type
== ISCSI_UEVENT_GET_STATS
&& !err
)
1107 err
= iscsi_if_send_reply(
1108 NETLINK_CREDS(skb
)->pid
, nlh
->nlmsg_seq
,
1109 nlh
->nlmsg_type
, 0, 0, ev
, sizeof(*ev
));
1110 } while (err
< 0 && err
!= -ECONNREFUSED
);
1111 skb_pull(skb
, rlen
);
1116 mutex_unlock(&rx_queue_mutex
);
1119 #define iscsi_cdev_to_conn(_cdev) \
1120 iscsi_dev_to_conn(_cdev->dev)
1122 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
1123 struct class_device_attribute class_device_attr_##_prefix##_##_name = \
1124 __ATTR(_name,_mode,_show,_store)
1127 * iSCSI connection attrs
1129 #define iscsi_conn_attr_show(param) \
1131 show_conn_param_##param(struct class_device *cdev, char *buf) \
1133 struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \
1134 struct iscsi_transport *t = conn->transport; \
1135 return t->get_conn_param(conn, param, buf); \
1138 #define iscsi_conn_attr(field, param) \
1139 iscsi_conn_attr_show(param) \
1140 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
1143 iscsi_conn_attr(max_recv_dlength
, ISCSI_PARAM_MAX_RECV_DLENGTH
);
1144 iscsi_conn_attr(max_xmit_dlength
, ISCSI_PARAM_MAX_XMIT_DLENGTH
);
1145 iscsi_conn_attr(header_digest
, ISCSI_PARAM_HDRDGST_EN
);
1146 iscsi_conn_attr(data_digest
, ISCSI_PARAM_DATADGST_EN
);
1147 iscsi_conn_attr(ifmarker
, ISCSI_PARAM_IFMARKER_EN
);
1148 iscsi_conn_attr(ofmarker
, ISCSI_PARAM_OFMARKER_EN
);
1149 iscsi_conn_attr(persistent_port
, ISCSI_PARAM_PERSISTENT_PORT
);
1150 iscsi_conn_attr(port
, ISCSI_PARAM_CONN_PORT
);
1151 iscsi_conn_attr(exp_statsn
, ISCSI_PARAM_EXP_STATSN
);
1152 iscsi_conn_attr(persistent_address
, ISCSI_PARAM_PERSISTENT_ADDRESS
);
1153 iscsi_conn_attr(address
, ISCSI_PARAM_CONN_ADDRESS
);
1155 #define iscsi_cdev_to_session(_cdev) \
1156 iscsi_dev_to_session(_cdev->dev)
1159 * iSCSI session attrs
1161 #define iscsi_session_attr_show(param) \
1163 show_session_param_##param(struct class_device *cdev, char *buf) \
1165 struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
1166 struct iscsi_transport *t = session->transport; \
1167 return t->get_session_param(session, param, buf); \
1170 #define iscsi_session_attr(field, param) \
1171 iscsi_session_attr_show(param) \
1172 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
1175 iscsi_session_attr(targetname
, ISCSI_PARAM_TARGET_NAME
);
1176 iscsi_session_attr(initial_r2t
, ISCSI_PARAM_INITIAL_R2T_EN
);
1177 iscsi_session_attr(max_outstanding_r2t
, ISCSI_PARAM_MAX_R2T
);
1178 iscsi_session_attr(immediate_data
, ISCSI_PARAM_IMM_DATA_EN
);
1179 iscsi_session_attr(first_burst_len
, ISCSI_PARAM_FIRST_BURST
);
1180 iscsi_session_attr(max_burst_len
, ISCSI_PARAM_MAX_BURST
);
1181 iscsi_session_attr(data_pdu_in_order
, ISCSI_PARAM_PDU_INORDER_EN
);
1182 iscsi_session_attr(data_seq_in_order
, ISCSI_PARAM_DATASEQ_INORDER_EN
);
1183 iscsi_session_attr(erl
, ISCSI_PARAM_ERL
);
1184 iscsi_session_attr(tpgt
, ISCSI_PARAM_TPGT
);
1186 #define iscsi_priv_session_attr_show(field, format) \
1188 show_priv_session_##field(struct class_device *cdev, char *buf) \
1190 struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev);\
1191 return sprintf(buf, format"\n", session->field); \
1194 #define iscsi_priv_session_attr(field, format) \
1195 iscsi_priv_session_attr_show(field, format) \
1196 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \
1198 iscsi_priv_session_attr(recovery_tmo
, "%d");
1200 #define SETUP_PRIV_SESSION_RD_ATTR(field) \
1202 priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \
1207 #define SETUP_SESSION_RD_ATTR(field, param_flag) \
1209 if (tt->param_mask & param_flag) { \
1210 priv->session_attrs[count] = &class_device_attr_sess_##field; \
1215 #define SETUP_CONN_RD_ATTR(field, param_flag) \
1217 if (tt->param_mask & param_flag) { \
1218 priv->conn_attrs[count] = &class_device_attr_conn_##field; \
1223 static int iscsi_session_match(struct attribute_container
*cont
,
1226 struct iscsi_cls_session
*session
;
1227 struct Scsi_Host
*shost
;
1228 struct iscsi_internal
*priv
;
1230 if (!iscsi_is_session_dev(dev
))
1233 session
= iscsi_dev_to_session(dev
);
1234 shost
= iscsi_session_to_shost(session
);
1235 if (!shost
->transportt
)
1238 priv
= to_iscsi_internal(shost
->transportt
);
1239 if (priv
->session_cont
.ac
.class != &iscsi_session_class
.class)
1242 return &priv
->session_cont
.ac
== cont
;
1245 static int iscsi_conn_match(struct attribute_container
*cont
,
1248 struct iscsi_cls_session
*session
;
1249 struct iscsi_cls_conn
*conn
;
1250 struct Scsi_Host
*shost
;
1251 struct iscsi_internal
*priv
;
1253 if (!iscsi_is_conn_dev(dev
))
1256 conn
= iscsi_dev_to_conn(dev
);
1257 session
= iscsi_dev_to_session(conn
->dev
.parent
);
1258 shost
= iscsi_session_to_shost(session
);
1260 if (!shost
->transportt
)
1263 priv
= to_iscsi_internal(shost
->transportt
);
1264 if (priv
->conn_cont
.ac
.class != &iscsi_connection_class
.class)
1267 return &priv
->conn_cont
.ac
== cont
;
1270 static int iscsi_host_match(struct attribute_container
*cont
,
1273 struct Scsi_Host
*shost
;
1274 struct iscsi_internal
*priv
;
1276 if (!scsi_is_host_device(dev
))
1279 shost
= dev_to_shost(dev
);
1280 if (!shost
->transportt
||
1281 shost
->transportt
->host_attrs
.ac
.class != &iscsi_host_class
.class)
1284 priv
= to_iscsi_internal(shost
->transportt
);
1285 return &priv
->t
.host_attrs
.ac
== cont
;
1288 struct scsi_transport_template
*
1289 iscsi_register_transport(struct iscsi_transport
*tt
)
1291 struct iscsi_internal
*priv
;
1292 unsigned long flags
;
1297 priv
= iscsi_if_transport_lookup(tt
);
1301 priv
= kzalloc(sizeof(*priv
), GFP_KERNEL
);
1304 INIT_LIST_HEAD(&priv
->list
);
1305 priv
->daemon_pid
= -1;
1306 priv
->iscsi_transport
= tt
;
1307 priv
->t
.user_scan
= iscsi_user_scan
;
1309 priv
->cdev
.class = &iscsi_transport_class
;
1310 snprintf(priv
->cdev
.class_id
, BUS_ID_SIZE
, "%s", tt
->name
);
1311 err
= class_device_register(&priv
->cdev
);
1315 err
= sysfs_create_group(&priv
->cdev
.kobj
, &iscsi_transport_group
);
1317 goto unregister_cdev
;
1319 /* host parameters */
1320 priv
->t
.host_attrs
.ac
.attrs
= &priv
->host_attrs
[0];
1321 priv
->t
.host_attrs
.ac
.class = &iscsi_host_class
.class;
1322 priv
->t
.host_attrs
.ac
.match
= iscsi_host_match
;
1323 priv
->t
.host_size
= sizeof(struct iscsi_host
);
1324 priv
->host_attrs
[0] = NULL
;
1325 transport_container_register(&priv
->t
.host_attrs
);
1327 /* connection parameters */
1328 priv
->conn_cont
.ac
.attrs
= &priv
->conn_attrs
[0];
1329 priv
->conn_cont
.ac
.class = &iscsi_connection_class
.class;
1330 priv
->conn_cont
.ac
.match
= iscsi_conn_match
;
1331 transport_container_register(&priv
->conn_cont
);
1333 SETUP_CONN_RD_ATTR(max_recv_dlength
, ISCSI_MAX_RECV_DLENGTH
);
1334 SETUP_CONN_RD_ATTR(max_xmit_dlength
, ISCSI_MAX_XMIT_DLENGTH
);
1335 SETUP_CONN_RD_ATTR(header_digest
, ISCSI_HDRDGST_EN
);
1336 SETUP_CONN_RD_ATTR(data_digest
, ISCSI_DATADGST_EN
);
1337 SETUP_CONN_RD_ATTR(ifmarker
, ISCSI_IFMARKER_EN
);
1338 SETUP_CONN_RD_ATTR(ofmarker
, ISCSI_OFMARKER_EN
);
1339 SETUP_CONN_RD_ATTR(address
, ISCSI_CONN_ADDRESS
);
1340 SETUP_CONN_RD_ATTR(port
, ISCSI_CONN_PORT
);
1341 SETUP_CONN_RD_ATTR(exp_statsn
, ISCSI_EXP_STATSN
);
1342 SETUP_CONN_RD_ATTR(persistent_address
, ISCSI_PERSISTENT_ADDRESS
);
1343 SETUP_CONN_RD_ATTR(persistent_port
, ISCSI_PERSISTENT_PORT
);
1345 BUG_ON(count
> ISCSI_CONN_ATTRS
);
1346 priv
->conn_attrs
[count
] = NULL
;
1349 /* session parameters */
1350 priv
->session_cont
.ac
.attrs
= &priv
->session_attrs
[0];
1351 priv
->session_cont
.ac
.class = &iscsi_session_class
.class;
1352 priv
->session_cont
.ac
.match
= iscsi_session_match
;
1353 transport_container_register(&priv
->session_cont
);
1355 SETUP_SESSION_RD_ATTR(initial_r2t
, ISCSI_INITIAL_R2T_EN
);
1356 SETUP_SESSION_RD_ATTR(max_outstanding_r2t
, ISCSI_MAX_R2T
);
1357 SETUP_SESSION_RD_ATTR(immediate_data
, ISCSI_IMM_DATA_EN
);
1358 SETUP_SESSION_RD_ATTR(first_burst_len
, ISCSI_FIRST_BURST
);
1359 SETUP_SESSION_RD_ATTR(max_burst_len
, ISCSI_MAX_BURST
);
1360 SETUP_SESSION_RD_ATTR(data_pdu_in_order
, ISCSI_PDU_INORDER_EN
);
1361 SETUP_SESSION_RD_ATTR(data_seq_in_order
, ISCSI_DATASEQ_INORDER_EN
);
1362 SETUP_SESSION_RD_ATTR(erl
, ISCSI_ERL
);
1363 SETUP_SESSION_RD_ATTR(targetname
, ISCSI_TARGET_NAME
);
1364 SETUP_SESSION_RD_ATTR(tpgt
, ISCSI_TPGT
);
1365 SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo
);
1367 BUG_ON(count
> ISCSI_SESSION_ATTRS
);
1368 priv
->session_attrs
[count
] = NULL
;
1370 spin_lock_irqsave(&iscsi_transport_lock
, flags
);
1371 list_add(&priv
->list
, &iscsi_transports
);
1372 spin_unlock_irqrestore(&iscsi_transport_lock
, flags
);
1374 printk(KERN_NOTICE
"iscsi: registered transport (%s)\n", tt
->name
);
1378 class_device_unregister(&priv
->cdev
);
1383 EXPORT_SYMBOL_GPL(iscsi_register_transport
);
1385 int iscsi_unregister_transport(struct iscsi_transport
*tt
)
1387 struct iscsi_internal
*priv
;
1388 unsigned long flags
;
1392 mutex_lock(&rx_queue_mutex
);
1394 priv
= iscsi_if_transport_lookup(tt
);
1397 spin_lock_irqsave(&iscsi_transport_lock
, flags
);
1398 list_del(&priv
->list
);
1399 spin_unlock_irqrestore(&iscsi_transport_lock
, flags
);
1401 transport_container_unregister(&priv
->conn_cont
);
1402 transport_container_unregister(&priv
->session_cont
);
1403 transport_container_unregister(&priv
->t
.host_attrs
);
1405 sysfs_remove_group(&priv
->cdev
.kobj
, &iscsi_transport_group
);
1406 class_device_unregister(&priv
->cdev
);
1407 mutex_unlock(&rx_queue_mutex
);
1411 EXPORT_SYMBOL_GPL(iscsi_unregister_transport
);
1413 static __init
int iscsi_transport_init(void)
1417 printk(KERN_INFO
"Loading iSCSI transport class v%s.",
1418 ISCSI_TRANSPORT_VERSION
);
1420 err
= class_register(&iscsi_transport_class
);
1424 err
= transport_class_register(&iscsi_host_class
);
1426 goto unregister_transport_class
;
1428 err
= transport_class_register(&iscsi_connection_class
);
1430 goto unregister_host_class
;
1432 err
= transport_class_register(&iscsi_session_class
);
1434 goto unregister_conn_class
;
1436 nls
= netlink_kernel_create(NETLINK_ISCSI
, 1, iscsi_if_rx
,
1440 goto unregister_session_class
;
1445 unregister_session_class
:
1446 transport_class_unregister(&iscsi_session_class
);
1447 unregister_conn_class
:
1448 transport_class_unregister(&iscsi_connection_class
);
1449 unregister_host_class
:
1450 transport_class_unregister(&iscsi_host_class
);
1451 unregister_transport_class
:
1452 class_unregister(&iscsi_transport_class
);
1456 static void __exit
iscsi_transport_exit(void)
1458 sock_release(nls
->sk_socket
);
1459 transport_class_unregister(&iscsi_connection_class
);
1460 transport_class_unregister(&iscsi_session_class
);
1461 transport_class_unregister(&iscsi_host_class
);
1462 class_unregister(&iscsi_transport_class
);
1465 module_init(iscsi_transport_init
);
1466 module_exit(iscsi_transport_exit
);
1468 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
1469 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
1470 "Alex Aizman <itn780@yahoo.com>");
1471 MODULE_DESCRIPTION("iSCSI Transport Interface");
1472 MODULE_LICENSE("GPL");
1473 MODULE_VERSION(ISCSI_TRANSPORT_VERSION
);