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 16
34 #define ISCSI_CONN_ATTRS 11
35 #define ISCSI_HOST_ATTRS 4
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 atomic_t iscsi_session_nr
; /* sysfs session id for next new session */
53 static struct workqueue_struct
*iscsi_eh_timer_workq
;
56 * list of registered transports and lock that must
57 * be held while accessing list. The iscsi_transport_lock must
58 * be acquired after the rx_queue_mutex.
60 static LIST_HEAD(iscsi_transports
);
61 static DEFINE_SPINLOCK(iscsi_transport_lock
);
63 #define to_iscsi_internal(tmpl) \
64 container_of(tmpl, struct iscsi_internal, t)
66 #define cdev_to_iscsi_internal(_cdev) \
67 container_of(_cdev, struct iscsi_internal, cdev)
69 static void iscsi_transport_release(struct class_device
*cdev
)
71 struct iscsi_internal
*priv
= cdev_to_iscsi_internal(cdev
);
76 * iscsi_transport_class represents the iscsi_transports that are
79 static struct class iscsi_transport_class
= {
80 .name
= "iscsi_transport",
81 .release
= iscsi_transport_release
,
85 show_transport_handle(struct class_device
*cdev
, char *buf
)
87 struct iscsi_internal
*priv
= cdev_to_iscsi_internal(cdev
);
88 return sprintf(buf
, "%llu\n", (unsigned long long)iscsi_handle(priv
->iscsi_transport
));
90 static CLASS_DEVICE_ATTR(handle
, S_IRUGO
, show_transport_handle
, NULL
);
92 #define show_transport_attr(name, format) \
94 show_transport_##name(struct class_device *cdev, char *buf) \
96 struct iscsi_internal *priv = cdev_to_iscsi_internal(cdev); \
97 return sprintf(buf, format"\n", priv->iscsi_transport->name); \
99 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
101 show_transport_attr(caps
, "0x%x");
102 show_transport_attr(max_lun
, "%d");
103 show_transport_attr(max_conn
, "%d");
104 show_transport_attr(max_cmd_len
, "%d");
106 static struct attribute
*iscsi_transport_attrs
[] = {
107 &class_device_attr_handle
.attr
,
108 &class_device_attr_caps
.attr
,
109 &class_device_attr_max_lun
.attr
,
110 &class_device_attr_max_conn
.attr
,
111 &class_device_attr_max_cmd_len
.attr
,
115 static struct attribute_group iscsi_transport_group
= {
116 .attrs
= iscsi_transport_attrs
,
119 static int iscsi_setup_host(struct transport_container
*tc
, struct device
*dev
,
120 struct class_device
*cdev
)
122 struct Scsi_Host
*shost
= dev_to_shost(dev
);
123 struct iscsi_host
*ihost
= shost
->shost_data
;
125 memset(ihost
, 0, sizeof(*ihost
));
126 INIT_LIST_HEAD(&ihost
->sessions
);
127 mutex_init(&ihost
->mutex
);
131 static DECLARE_TRANSPORT_CLASS(iscsi_host_class
,
137 static DECLARE_TRANSPORT_CLASS(iscsi_session_class
,
143 static DECLARE_TRANSPORT_CLASS(iscsi_connection_class
,
149 static struct sock
*nls
;
150 static DEFINE_MUTEX(rx_queue_mutex
);
152 static LIST_HEAD(sesslist
);
153 static DEFINE_SPINLOCK(sesslock
);
154 static LIST_HEAD(connlist
);
155 static DEFINE_SPINLOCK(connlock
);
157 static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn
*conn
)
159 struct iscsi_cls_session
*sess
= iscsi_dev_to_session(conn
->dev
.parent
);
164 * Returns the matching session to a given sid
166 static struct iscsi_cls_session
*iscsi_session_lookup(uint32_t sid
)
169 struct iscsi_cls_session
*sess
;
171 spin_lock_irqsave(&sesslock
, flags
);
172 list_for_each_entry(sess
, &sesslist
, sess_list
) {
173 if (sess
->sid
== sid
) {
174 spin_unlock_irqrestore(&sesslock
, flags
);
178 spin_unlock_irqrestore(&sesslock
, flags
);
183 * Returns the matching connection to a given sid / cid tuple
185 static struct iscsi_cls_conn
*iscsi_conn_lookup(uint32_t sid
, uint32_t cid
)
188 struct iscsi_cls_conn
*conn
;
190 spin_lock_irqsave(&connlock
, flags
);
191 list_for_each_entry(conn
, &connlist
, conn_list
) {
192 if ((conn
->cid
== cid
) && (iscsi_conn_get_sid(conn
) == sid
)) {
193 spin_unlock_irqrestore(&connlock
, flags
);
197 spin_unlock_irqrestore(&connlock
, flags
);
202 * The following functions can be used by LLDs that allocate
203 * their own scsi_hosts or by software iscsi LLDs
205 static void iscsi_session_release(struct device
*dev
)
207 struct iscsi_cls_session
*session
= iscsi_dev_to_session(dev
);
208 struct Scsi_Host
*shost
;
210 shost
= iscsi_session_to_shost(session
);
211 scsi_host_put(shost
);
215 static int iscsi_is_session_dev(const struct device
*dev
)
217 return dev
->release
== iscsi_session_release
;
220 static int iscsi_user_scan(struct Scsi_Host
*shost
, uint channel
,
223 struct iscsi_host
*ihost
= shost
->shost_data
;
224 struct iscsi_cls_session
*session
;
226 mutex_lock(&ihost
->mutex
);
227 list_for_each_entry(session
, &ihost
->sessions
, host_list
) {
228 if ((channel
== SCAN_WILD_CARD
|| channel
== 0) &&
229 (id
== SCAN_WILD_CARD
|| id
== session
->target_id
))
230 scsi_scan_target(&session
->dev
, 0,
231 session
->target_id
, lun
, 1);
233 mutex_unlock(&ihost
->mutex
);
238 static void session_recovery_timedout(struct work_struct
*work
)
240 struct iscsi_cls_session
*session
=
241 container_of(work
, struct iscsi_cls_session
,
244 dev_printk(KERN_INFO
, &session
->dev
, "iscsi: session recovery timed "
245 "out after %d secs\n", session
->recovery_tmo
);
247 if (session
->transport
->session_recovery_timedout
)
248 session
->transport
->session_recovery_timedout(session
);
250 scsi_target_unblock(&session
->dev
);
253 void iscsi_unblock_session(struct iscsi_cls_session
*session
)
255 if (!cancel_delayed_work(&session
->recovery_work
))
256 flush_workqueue(iscsi_eh_timer_workq
);
257 scsi_target_unblock(&session
->dev
);
259 EXPORT_SYMBOL_GPL(iscsi_unblock_session
);
261 void iscsi_block_session(struct iscsi_cls_session
*session
)
263 scsi_target_block(&session
->dev
);
264 queue_delayed_work(iscsi_eh_timer_workq
, &session
->recovery_work
,
265 session
->recovery_tmo
* HZ
);
267 EXPORT_SYMBOL_GPL(iscsi_block_session
);
269 struct iscsi_cls_session
*
270 iscsi_alloc_session(struct Scsi_Host
*shost
,
271 struct iscsi_transport
*transport
)
273 struct iscsi_cls_session
*session
;
275 session
= kzalloc(sizeof(*session
) + transport
->sessiondata_size
,
280 session
->transport
= transport
;
281 session
->recovery_tmo
= 120;
282 INIT_DELAYED_WORK(&session
->recovery_work
, session_recovery_timedout
);
283 INIT_LIST_HEAD(&session
->host_list
);
284 INIT_LIST_HEAD(&session
->sess_list
);
286 /* this is released in the dev's release function */
287 scsi_host_get(shost
);
288 session
->dev
.parent
= &shost
->shost_gendev
;
289 session
->dev
.release
= iscsi_session_release
;
290 device_initialize(&session
->dev
);
291 if (transport
->sessiondata_size
)
292 session
->dd_data
= &session
[1];
295 EXPORT_SYMBOL_GPL(iscsi_alloc_session
);
297 int iscsi_add_session(struct iscsi_cls_session
*session
, unsigned int target_id
)
299 struct Scsi_Host
*shost
= iscsi_session_to_shost(session
);
300 struct iscsi_host
*ihost
;
303 ihost
= shost
->shost_data
;
304 session
->sid
= atomic_add_return(1, &iscsi_session_nr
);
305 session
->target_id
= target_id
;
307 snprintf(session
->dev
.bus_id
, BUS_ID_SIZE
, "session%u",
309 err
= device_add(&session
->dev
);
311 dev_printk(KERN_ERR
, &session
->dev
, "iscsi: could not "
312 "register session's dev\n");
315 transport_register_device(&session
->dev
);
317 mutex_lock(&ihost
->mutex
);
318 list_add(&session
->host_list
, &ihost
->sessions
);
319 mutex_unlock(&ihost
->mutex
);
323 scsi_host_put(shost
);
326 EXPORT_SYMBOL_GPL(iscsi_add_session
);
329 * iscsi_create_session - create iscsi class session
331 * @transport: iscsi transport
332 * @target_id: which target
334 * This can be called from a LLD or iscsi_transport.
336 struct iscsi_cls_session
*
337 iscsi_create_session(struct Scsi_Host
*shost
,
338 struct iscsi_transport
*transport
,
339 unsigned int target_id
)
341 struct iscsi_cls_session
*session
;
343 session
= iscsi_alloc_session(shost
, transport
);
347 if (iscsi_add_session(session
, target_id
)) {
348 iscsi_free_session(session
);
353 EXPORT_SYMBOL_GPL(iscsi_create_session
);
355 void iscsi_remove_session(struct iscsi_cls_session
*session
)
357 struct Scsi_Host
*shost
= iscsi_session_to_shost(session
);
358 struct iscsi_host
*ihost
= shost
->shost_data
;
360 if (!cancel_delayed_work(&session
->recovery_work
))
361 flush_workqueue(iscsi_eh_timer_workq
);
363 mutex_lock(&ihost
->mutex
);
364 list_del(&session
->host_list
);
365 mutex_unlock(&ihost
->mutex
);
367 scsi_remove_target(&session
->dev
);
369 transport_unregister_device(&session
->dev
);
370 device_del(&session
->dev
);
372 EXPORT_SYMBOL_GPL(iscsi_remove_session
);
374 void iscsi_free_session(struct iscsi_cls_session
*session
)
376 put_device(&session
->dev
);
379 EXPORT_SYMBOL_GPL(iscsi_free_session
);
382 * iscsi_destroy_session - destroy iscsi session
383 * @session: iscsi_session
385 * Can be called by a LLD or iscsi_transport. There must not be
386 * any running connections.
388 int iscsi_destroy_session(struct iscsi_cls_session
*session
)
390 iscsi_remove_session(session
);
391 iscsi_free_session(session
);
394 EXPORT_SYMBOL_GPL(iscsi_destroy_session
);
396 static void iscsi_conn_release(struct device
*dev
)
398 struct iscsi_cls_conn
*conn
= iscsi_dev_to_conn(dev
);
399 struct device
*parent
= conn
->dev
.parent
;
405 static int iscsi_is_conn_dev(const struct device
*dev
)
407 return dev
->release
== iscsi_conn_release
;
411 * iscsi_create_conn - create iscsi class connection
412 * @session: iscsi cls session
413 * @cid: connection id
415 * This can be called from a LLD or iscsi_transport. The connection
416 * is child of the session so cid must be unique for all connections
419 * Since we do not support MCS, cid will normally be zero. In some cases
420 * for software iscsi we could be trying to preallocate a connection struct
421 * in which case there could be two connection structs and cid would be
424 struct iscsi_cls_conn
*
425 iscsi_create_conn(struct iscsi_cls_session
*session
, uint32_t cid
)
427 struct iscsi_transport
*transport
= session
->transport
;
428 struct iscsi_cls_conn
*conn
;
431 conn
= kzalloc(sizeof(*conn
) + transport
->conndata_size
, GFP_KERNEL
);
435 if (transport
->conndata_size
)
436 conn
->dd_data
= &conn
[1];
438 INIT_LIST_HEAD(&conn
->conn_list
);
439 conn
->transport
= transport
;
442 /* this is released in the dev's release function */
443 if (!get_device(&session
->dev
))
446 snprintf(conn
->dev
.bus_id
, BUS_ID_SIZE
, "connection%d:%u",
448 conn
->dev
.parent
= &session
->dev
;
449 conn
->dev
.release
= iscsi_conn_release
;
450 err
= device_register(&conn
->dev
);
452 dev_printk(KERN_ERR
, &conn
->dev
, "iscsi: could not register "
453 "connection's dev\n");
454 goto release_parent_ref
;
456 transport_register_device(&conn
->dev
);
460 put_device(&session
->dev
);
466 EXPORT_SYMBOL_GPL(iscsi_create_conn
);
469 * iscsi_destroy_conn - destroy iscsi class connection
470 * @conn: iscsi cls session
472 * This can be called from an LLD or iscsi_transport.
474 int iscsi_destroy_conn(struct iscsi_cls_conn
*conn
)
476 transport_unregister_device(&conn
->dev
);
477 device_unregister(&conn
->dev
);
481 EXPORT_SYMBOL_GPL(iscsi_destroy_conn
);
484 * iscsi interface functions
486 static struct iscsi_internal
*
487 iscsi_if_transport_lookup(struct iscsi_transport
*tt
)
489 struct iscsi_internal
*priv
;
492 spin_lock_irqsave(&iscsi_transport_lock
, flags
);
493 list_for_each_entry(priv
, &iscsi_transports
, list
) {
494 if (tt
== priv
->iscsi_transport
) {
495 spin_unlock_irqrestore(&iscsi_transport_lock
, flags
);
499 spin_unlock_irqrestore(&iscsi_transport_lock
, flags
);
504 iscsi_broadcast_skb(struct sk_buff
*skb
, gfp_t gfp
)
508 rc
= netlink_broadcast(nls
, skb
, 0, 1, gfp
);
510 printk(KERN_ERR
"iscsi: can not broadcast skb (%d)\n", rc
);
518 iscsi_unicast_skb(struct sk_buff
*skb
, int pid
)
522 rc
= netlink_unicast(nls
, skb
, pid
, MSG_DONTWAIT
);
524 printk(KERN_ERR
"iscsi: can not unicast skb (%d)\n", rc
);
531 int iscsi_recv_pdu(struct iscsi_cls_conn
*conn
, struct iscsi_hdr
*hdr
,
532 char *data
, uint32_t data_size
)
534 struct nlmsghdr
*nlh
;
536 struct iscsi_uevent
*ev
;
538 struct iscsi_internal
*priv
;
539 int len
= NLMSG_SPACE(sizeof(*ev
) + sizeof(struct iscsi_hdr
) +
542 priv
= iscsi_if_transport_lookup(conn
->transport
);
546 skb
= alloc_skb(len
, GFP_ATOMIC
);
548 iscsi_conn_error(conn
, ISCSI_ERR_CONN_FAILED
);
549 dev_printk(KERN_ERR
, &conn
->dev
, "iscsi: can not deliver "
550 "control PDU: OOM\n");
554 nlh
= __nlmsg_put(skb
, priv
->daemon_pid
, 0, 0, (len
- sizeof(*nlh
)), 0);
555 ev
= NLMSG_DATA(nlh
);
556 memset(ev
, 0, sizeof(*ev
));
557 ev
->transport_handle
= iscsi_handle(conn
->transport
);
558 ev
->type
= ISCSI_KEVENT_RECV_PDU
;
559 ev
->r
.recv_req
.cid
= conn
->cid
;
560 ev
->r
.recv_req
.sid
= iscsi_conn_get_sid(conn
);
561 pdu
= (char*)ev
+ sizeof(*ev
);
562 memcpy(pdu
, hdr
, sizeof(struct iscsi_hdr
));
563 memcpy(pdu
+ sizeof(struct iscsi_hdr
), data
, data_size
);
565 return iscsi_unicast_skb(skb
, priv
->daemon_pid
);
567 EXPORT_SYMBOL_GPL(iscsi_recv_pdu
);
569 void iscsi_conn_error(struct iscsi_cls_conn
*conn
, enum iscsi_err error
)
571 struct nlmsghdr
*nlh
;
573 struct iscsi_uevent
*ev
;
574 struct iscsi_internal
*priv
;
575 int len
= NLMSG_SPACE(sizeof(*ev
));
577 priv
= iscsi_if_transport_lookup(conn
->transport
);
581 skb
= alloc_skb(len
, GFP_ATOMIC
);
583 dev_printk(KERN_ERR
, &conn
->dev
, "iscsi: gracefully ignored "
584 "conn error (%d)\n", error
);
588 nlh
= __nlmsg_put(skb
, priv
->daemon_pid
, 0, 0, (len
- sizeof(*nlh
)), 0);
589 ev
= NLMSG_DATA(nlh
);
590 ev
->transport_handle
= iscsi_handle(conn
->transport
);
591 ev
->type
= ISCSI_KEVENT_CONN_ERROR
;
592 ev
->r
.connerror
.error
= error
;
593 ev
->r
.connerror
.cid
= conn
->cid
;
594 ev
->r
.connerror
.sid
= iscsi_conn_get_sid(conn
);
596 iscsi_broadcast_skb(skb
, GFP_ATOMIC
);
598 dev_printk(KERN_INFO
, &conn
->dev
, "iscsi: detected conn error (%d)\n",
601 EXPORT_SYMBOL_GPL(iscsi_conn_error
);
604 iscsi_if_send_reply(int pid
, int seq
, int type
, int done
, int multi
,
605 void *payload
, int size
)
608 struct nlmsghdr
*nlh
;
609 int len
= NLMSG_SPACE(size
);
610 int flags
= multi
? NLM_F_MULTI
: 0;
611 int t
= done
? NLMSG_DONE
: type
;
613 skb
= alloc_skb(len
, GFP_ATOMIC
);
615 printk(KERN_ERR
"Could not allocate skb to send reply.\n");
619 nlh
= __nlmsg_put(skb
, pid
, seq
, t
, (len
- sizeof(*nlh
)), 0);
620 nlh
->nlmsg_flags
= flags
;
621 memcpy(NLMSG_DATA(nlh
), payload
, size
);
622 return iscsi_unicast_skb(skb
, pid
);
626 iscsi_if_get_stats(struct iscsi_transport
*transport
, struct nlmsghdr
*nlh
)
628 struct iscsi_uevent
*ev
= NLMSG_DATA(nlh
);
629 struct iscsi_stats
*stats
;
630 struct sk_buff
*skbstat
;
631 struct iscsi_cls_conn
*conn
;
632 struct nlmsghdr
*nlhstat
;
633 struct iscsi_uevent
*evstat
;
634 struct iscsi_internal
*priv
;
635 int len
= NLMSG_SPACE(sizeof(*ev
) +
636 sizeof(struct iscsi_stats
) +
637 sizeof(struct iscsi_stats_custom
) *
638 ISCSI_STATS_CUSTOM_MAX
);
641 priv
= iscsi_if_transport_lookup(transport
);
645 conn
= iscsi_conn_lookup(ev
->u
.get_stats
.sid
, ev
->u
.get_stats
.cid
);
652 skbstat
= alloc_skb(len
, GFP_ATOMIC
);
654 dev_printk(KERN_ERR
, &conn
->dev
, "iscsi: can not "
655 "deliver stats: OOM\n");
659 nlhstat
= __nlmsg_put(skbstat
, priv
->daemon_pid
, 0, 0,
660 (len
- sizeof(*nlhstat
)), 0);
661 evstat
= NLMSG_DATA(nlhstat
);
662 memset(evstat
, 0, sizeof(*evstat
));
663 evstat
->transport_handle
= iscsi_handle(conn
->transport
);
664 evstat
->type
= nlh
->nlmsg_type
;
665 evstat
->u
.get_stats
.cid
=
667 evstat
->u
.get_stats
.sid
=
669 stats
= (struct iscsi_stats
*)
670 ((char*)evstat
+ sizeof(*evstat
));
671 memset(stats
, 0, sizeof(*stats
));
673 transport
->get_stats(conn
, stats
);
674 actual_size
= NLMSG_SPACE(sizeof(struct iscsi_uevent
) +
675 sizeof(struct iscsi_stats
) +
676 sizeof(struct iscsi_stats_custom
) *
677 stats
->custom_length
);
678 actual_size
-= sizeof(*nlhstat
);
679 actual_size
= NLMSG_LENGTH(actual_size
);
680 skb_trim(skbstat
, NLMSG_ALIGN(actual_size
));
681 nlhstat
->nlmsg_len
= actual_size
;
683 err
= iscsi_unicast_skb(skbstat
, priv
->daemon_pid
);
684 } while (err
< 0 && err
!= -ECONNREFUSED
);
690 * iscsi_if_destroy_session_done - send session destr. completion event
691 * @conn: last connection for session
693 * This is called by HW iscsi LLDs to notify userpsace that its HW has
696 int iscsi_if_destroy_session_done(struct iscsi_cls_conn
*conn
)
698 struct iscsi_internal
*priv
;
699 struct iscsi_cls_session
*session
;
700 struct Scsi_Host
*shost
;
701 struct iscsi_uevent
*ev
;
703 struct nlmsghdr
*nlh
;
705 int rc
, len
= NLMSG_SPACE(sizeof(*ev
));
707 priv
= iscsi_if_transport_lookup(conn
->transport
);
711 session
= iscsi_dev_to_session(conn
->dev
.parent
);
712 shost
= iscsi_session_to_shost(session
);
714 skb
= alloc_skb(len
, GFP_KERNEL
);
716 dev_printk(KERN_ERR
, &conn
->dev
, "Cannot notify userspace of "
717 "session creation event\n");
721 nlh
= __nlmsg_put(skb
, priv
->daemon_pid
, 0, 0, (len
- sizeof(*nlh
)), 0);
722 ev
= NLMSG_DATA(nlh
);
723 ev
->transport_handle
= iscsi_handle(conn
->transport
);
724 ev
->type
= ISCSI_KEVENT_DESTROY_SESSION
;
725 ev
->r
.d_session
.host_no
= shost
->host_no
;
726 ev
->r
.d_session
.sid
= session
->sid
;
729 * this will occur if the daemon is not up, so we just warn
730 * the user and when the daemon is restarted it will handle it
732 rc
= iscsi_broadcast_skb(skb
, GFP_KERNEL
);
734 dev_printk(KERN_ERR
, &conn
->dev
, "Cannot notify userspace of "
735 "session destruction event. Check iscsi daemon\n");
737 spin_lock_irqsave(&sesslock
, flags
);
738 list_del(&session
->sess_list
);
739 spin_unlock_irqrestore(&sesslock
, flags
);
741 spin_lock_irqsave(&connlock
, flags
);
743 list_del(&conn
->conn_list
);
744 spin_unlock_irqrestore(&connlock
, flags
);
748 EXPORT_SYMBOL_GPL(iscsi_if_destroy_session_done
);
751 * iscsi_if_create_session_done - send session creation completion event
752 * @conn: leading connection for session
754 * This is called by HW iscsi LLDs to notify userpsace that its HW has
755 * created a session or a existing session is back in the logged in state.
757 int iscsi_if_create_session_done(struct iscsi_cls_conn
*conn
)
759 struct iscsi_internal
*priv
;
760 struct iscsi_cls_session
*session
;
761 struct Scsi_Host
*shost
;
762 struct iscsi_uevent
*ev
;
764 struct nlmsghdr
*nlh
;
766 int rc
, len
= NLMSG_SPACE(sizeof(*ev
));
768 priv
= iscsi_if_transport_lookup(conn
->transport
);
772 session
= iscsi_dev_to_session(conn
->dev
.parent
);
773 shost
= iscsi_session_to_shost(session
);
775 skb
= alloc_skb(len
, GFP_KERNEL
);
777 dev_printk(KERN_ERR
, &conn
->dev
, "Cannot notify userspace of "
778 "session creation event\n");
782 nlh
= __nlmsg_put(skb
, priv
->daemon_pid
, 0, 0, (len
- sizeof(*nlh
)), 0);
783 ev
= NLMSG_DATA(nlh
);
784 ev
->transport_handle
= iscsi_handle(conn
->transport
);
785 ev
->type
= ISCSI_UEVENT_CREATE_SESSION
;
786 ev
->r
.c_session_ret
.host_no
= shost
->host_no
;
787 ev
->r
.c_session_ret
.sid
= session
->sid
;
790 * this will occur if the daemon is not up, so we just warn
791 * the user and when the daemon is restarted it will handle it
793 rc
= iscsi_broadcast_skb(skb
, GFP_KERNEL
);
795 dev_printk(KERN_ERR
, &conn
->dev
, "Cannot notify userspace of "
796 "session creation event. Check iscsi daemon\n");
798 spin_lock_irqsave(&sesslock
, flags
);
799 list_add(&session
->sess_list
, &sesslist
);
800 spin_unlock_irqrestore(&sesslock
, flags
);
802 spin_lock_irqsave(&connlock
, flags
);
803 list_add(&conn
->conn_list
, &connlist
);
805 spin_unlock_irqrestore(&connlock
, flags
);
808 EXPORT_SYMBOL_GPL(iscsi_if_create_session_done
);
811 iscsi_if_create_session(struct iscsi_internal
*priv
, struct iscsi_uevent
*ev
)
813 struct iscsi_transport
*transport
= priv
->iscsi_transport
;
814 struct iscsi_cls_session
*session
;
818 session
= transport
->create_session(transport
, &priv
->t
,
819 ev
->u
.c_session
.cmds_max
,
820 ev
->u
.c_session
.queue_depth
,
821 ev
->u
.c_session
.initial_cmdsn
,
826 spin_lock_irqsave(&sesslock
, flags
);
827 list_add(&session
->sess_list
, &sesslist
);
828 spin_unlock_irqrestore(&sesslock
, flags
);
830 ev
->r
.c_session_ret
.host_no
= hostno
;
831 ev
->r
.c_session_ret
.sid
= session
->sid
;
836 iscsi_if_create_conn(struct iscsi_transport
*transport
, struct iscsi_uevent
*ev
)
838 struct iscsi_cls_conn
*conn
;
839 struct iscsi_cls_session
*session
;
842 session
= iscsi_session_lookup(ev
->u
.c_conn
.sid
);
844 printk(KERN_ERR
"iscsi: invalid session %d\n",
849 conn
= transport
->create_conn(session
, ev
->u
.c_conn
.cid
);
851 printk(KERN_ERR
"iscsi: couldn't create a new "
852 "connection for session %d\n",
857 ev
->r
.c_conn_ret
.sid
= session
->sid
;
858 ev
->r
.c_conn_ret
.cid
= conn
->cid
;
860 spin_lock_irqsave(&connlock
, flags
);
861 list_add(&conn
->conn_list
, &connlist
);
863 spin_unlock_irqrestore(&connlock
, flags
);
869 iscsi_if_destroy_conn(struct iscsi_transport
*transport
, struct iscsi_uevent
*ev
)
872 struct iscsi_cls_conn
*conn
;
874 conn
= iscsi_conn_lookup(ev
->u
.d_conn
.sid
, ev
->u
.d_conn
.cid
);
877 spin_lock_irqsave(&connlock
, flags
);
879 list_del(&conn
->conn_list
);
880 spin_unlock_irqrestore(&connlock
, flags
);
882 if (transport
->destroy_conn
)
883 transport
->destroy_conn(conn
);
888 iscsi_set_param(struct iscsi_transport
*transport
, struct iscsi_uevent
*ev
)
890 char *data
= (char*)ev
+ sizeof(*ev
);
891 struct iscsi_cls_conn
*conn
;
892 struct iscsi_cls_session
*session
;
893 int err
= 0, value
= 0;
895 session
= iscsi_session_lookup(ev
->u
.set_param
.sid
);
896 conn
= iscsi_conn_lookup(ev
->u
.set_param
.sid
, ev
->u
.set_param
.cid
);
897 if (!conn
|| !session
)
900 switch (ev
->u
.set_param
.param
) {
901 case ISCSI_PARAM_SESS_RECOVERY_TMO
:
902 sscanf(data
, "%d", &value
);
904 session
->recovery_tmo
= value
;
907 err
= transport
->set_param(conn
, ev
->u
.set_param
.param
,
908 data
, ev
->u
.set_param
.len
);
915 iscsi_if_transport_ep(struct iscsi_transport
*transport
,
916 struct iscsi_uevent
*ev
, int msg_type
)
918 struct sockaddr
*dst_addr
;
922 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT
:
923 if (!transport
->ep_connect
)
926 dst_addr
= (struct sockaddr
*)((char*)ev
+ sizeof(*ev
));
927 rc
= transport
->ep_connect(dst_addr
,
928 ev
->u
.ep_connect
.non_blocking
,
929 &ev
->r
.ep_connect_ret
.handle
);
931 case ISCSI_UEVENT_TRANSPORT_EP_POLL
:
932 if (!transport
->ep_poll
)
935 ev
->r
.retcode
= transport
->ep_poll(ev
->u
.ep_poll
.ep_handle
,
936 ev
->u
.ep_poll
.timeout_ms
);
938 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT
:
939 if (!transport
->ep_disconnect
)
942 transport
->ep_disconnect(ev
->u
.ep_disconnect
.ep_handle
);
949 iscsi_tgt_dscvr(struct iscsi_transport
*transport
,
950 struct iscsi_uevent
*ev
)
952 struct Scsi_Host
*shost
;
953 struct sockaddr
*dst_addr
;
956 if (!transport
->tgt_dscvr
)
959 shost
= scsi_host_lookup(ev
->u
.tgt_dscvr
.host_no
);
961 printk(KERN_ERR
"target discovery could not find host no %u\n",
962 ev
->u
.tgt_dscvr
.host_no
);
967 dst_addr
= (struct sockaddr
*)((char*)ev
+ sizeof(*ev
));
968 err
= transport
->tgt_dscvr(shost
, ev
->u
.tgt_dscvr
.type
,
969 ev
->u
.tgt_dscvr
.enable
, dst_addr
);
970 scsi_host_put(shost
);
975 iscsi_set_host_param(struct iscsi_transport
*transport
,
976 struct iscsi_uevent
*ev
)
978 char *data
= (char*)ev
+ sizeof(*ev
);
979 struct Scsi_Host
*shost
;
982 if (!transport
->set_host_param
)
985 shost
= scsi_host_lookup(ev
->u
.set_host_param
.host_no
);
987 printk(KERN_ERR
"set_host_param could not find host no %u\n",
988 ev
->u
.set_host_param
.host_no
);
992 err
= transport
->set_host_param(shost
, ev
->u
.set_host_param
.param
,
993 data
, ev
->u
.set_host_param
.len
);
994 scsi_host_put(shost
);
999 iscsi_if_recv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1002 struct iscsi_uevent
*ev
= NLMSG_DATA(nlh
);
1003 struct iscsi_transport
*transport
= NULL
;
1004 struct iscsi_internal
*priv
;
1005 struct iscsi_cls_session
*session
;
1006 struct iscsi_cls_conn
*conn
;
1007 unsigned long flags
;
1009 priv
= iscsi_if_transport_lookup(iscsi_ptr(ev
->transport_handle
));
1012 transport
= priv
->iscsi_transport
;
1014 if (!try_module_get(transport
->owner
))
1017 priv
->daemon_pid
= NETLINK_CREDS(skb
)->pid
;
1019 switch (nlh
->nlmsg_type
) {
1020 case ISCSI_UEVENT_CREATE_SESSION
:
1021 err
= iscsi_if_create_session(priv
, ev
);
1023 case ISCSI_UEVENT_DESTROY_SESSION
:
1024 session
= iscsi_session_lookup(ev
->u
.d_session
.sid
);
1026 spin_lock_irqsave(&sesslock
, flags
);
1027 list_del(&session
->sess_list
);
1028 spin_unlock_irqrestore(&sesslock
, flags
);
1030 transport
->destroy_session(session
);
1034 case ISCSI_UEVENT_CREATE_CONN
:
1035 err
= iscsi_if_create_conn(transport
, ev
);
1037 case ISCSI_UEVENT_DESTROY_CONN
:
1038 err
= iscsi_if_destroy_conn(transport
, ev
);
1040 case ISCSI_UEVENT_BIND_CONN
:
1041 session
= iscsi_session_lookup(ev
->u
.b_conn
.sid
);
1042 conn
= iscsi_conn_lookup(ev
->u
.b_conn
.sid
, ev
->u
.b_conn
.cid
);
1044 if (session
&& conn
)
1045 ev
->r
.retcode
= transport
->bind_conn(session
, conn
,
1046 ev
->u
.b_conn
.transport_eph
,
1047 ev
->u
.b_conn
.is_leading
);
1051 case ISCSI_UEVENT_SET_PARAM
:
1052 err
= iscsi_set_param(transport
, ev
);
1054 case ISCSI_UEVENT_START_CONN
:
1055 conn
= iscsi_conn_lookup(ev
->u
.start_conn
.sid
, ev
->u
.start_conn
.cid
);
1057 ev
->r
.retcode
= transport
->start_conn(conn
);
1061 case ISCSI_UEVENT_STOP_CONN
:
1062 conn
= iscsi_conn_lookup(ev
->u
.stop_conn
.sid
, ev
->u
.stop_conn
.cid
);
1064 transport
->stop_conn(conn
, ev
->u
.stop_conn
.flag
);
1068 case ISCSI_UEVENT_SEND_PDU
:
1069 conn
= iscsi_conn_lookup(ev
->u
.send_pdu
.sid
, ev
->u
.send_pdu
.cid
);
1071 ev
->r
.retcode
= transport
->send_pdu(conn
,
1072 (struct iscsi_hdr
*)((char*)ev
+ sizeof(*ev
)),
1073 (char*)ev
+ sizeof(*ev
) + ev
->u
.send_pdu
.hdr_size
,
1074 ev
->u
.send_pdu
.data_size
);
1078 case ISCSI_UEVENT_GET_STATS
:
1079 err
= iscsi_if_get_stats(transport
, nlh
);
1081 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT
:
1082 case ISCSI_UEVENT_TRANSPORT_EP_POLL
:
1083 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT
:
1084 err
= iscsi_if_transport_ep(transport
, ev
, nlh
->nlmsg_type
);
1086 case ISCSI_UEVENT_TGT_DSCVR
:
1087 err
= iscsi_tgt_dscvr(transport
, ev
);
1089 case ISCSI_UEVENT_SET_HOST_PARAM
:
1090 err
= iscsi_set_host_param(transport
, ev
);
1097 module_put(transport
->owner
);
1102 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
1103 * Malformed skbs with wrong lengths or invalid creds are not processed.
1106 iscsi_if_rx(struct sk_buff
*skb
)
1108 mutex_lock(&rx_queue_mutex
);
1109 while (skb
->len
>= NLMSG_SPACE(0)) {
1112 struct nlmsghdr
*nlh
;
1113 struct iscsi_uevent
*ev
;
1115 nlh
= nlmsg_hdr(skb
);
1116 if (nlh
->nlmsg_len
< sizeof(*nlh
) ||
1117 skb
->len
< nlh
->nlmsg_len
) {
1121 ev
= NLMSG_DATA(nlh
);
1122 rlen
= NLMSG_ALIGN(nlh
->nlmsg_len
);
1123 if (rlen
> skb
->len
)
1126 err
= iscsi_if_recv_msg(skb
, nlh
);
1128 ev
->type
= ISCSI_KEVENT_IF_ERROR
;
1133 * special case for GET_STATS:
1134 * on success - sending reply and stats from
1135 * inside of if_recv_msg(),
1136 * on error - fall through.
1138 if (ev
->type
== ISCSI_UEVENT_GET_STATS
&& !err
)
1140 err
= iscsi_if_send_reply(
1141 NETLINK_CREDS(skb
)->pid
, nlh
->nlmsg_seq
,
1142 nlh
->nlmsg_type
, 0, 0, ev
, sizeof(*ev
));
1143 } while (err
< 0 && err
!= -ECONNREFUSED
);
1144 skb_pull(skb
, rlen
);
1146 mutex_unlock(&rx_queue_mutex
);
1149 #define iscsi_cdev_to_conn(_cdev) \
1150 iscsi_dev_to_conn(_cdev->dev)
1152 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
1153 struct class_device_attribute class_device_attr_##_prefix##_##_name = \
1154 __ATTR(_name,_mode,_show,_store)
1157 * iSCSI connection attrs
1159 #define iscsi_conn_attr_show(param) \
1161 show_conn_param_##param(struct class_device *cdev, char *buf) \
1163 struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \
1164 struct iscsi_transport *t = conn->transport; \
1165 return t->get_conn_param(conn, param, buf); \
1168 #define iscsi_conn_attr(field, param) \
1169 iscsi_conn_attr_show(param) \
1170 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
1173 iscsi_conn_attr(max_recv_dlength
, ISCSI_PARAM_MAX_RECV_DLENGTH
);
1174 iscsi_conn_attr(max_xmit_dlength
, ISCSI_PARAM_MAX_XMIT_DLENGTH
);
1175 iscsi_conn_attr(header_digest
, ISCSI_PARAM_HDRDGST_EN
);
1176 iscsi_conn_attr(data_digest
, ISCSI_PARAM_DATADGST_EN
);
1177 iscsi_conn_attr(ifmarker
, ISCSI_PARAM_IFMARKER_EN
);
1178 iscsi_conn_attr(ofmarker
, ISCSI_PARAM_OFMARKER_EN
);
1179 iscsi_conn_attr(persistent_port
, ISCSI_PARAM_PERSISTENT_PORT
);
1180 iscsi_conn_attr(port
, ISCSI_PARAM_CONN_PORT
);
1181 iscsi_conn_attr(exp_statsn
, ISCSI_PARAM_EXP_STATSN
);
1182 iscsi_conn_attr(persistent_address
, ISCSI_PARAM_PERSISTENT_ADDRESS
);
1183 iscsi_conn_attr(address
, ISCSI_PARAM_CONN_ADDRESS
);
1185 #define iscsi_cdev_to_session(_cdev) \
1186 iscsi_dev_to_session(_cdev->dev)
1189 * iSCSI session attrs
1191 #define iscsi_session_attr_show(param, perm) \
1193 show_session_param_##param(struct class_device *cdev, char *buf) \
1195 struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
1196 struct iscsi_transport *t = session->transport; \
1198 if (perm && !capable(CAP_SYS_ADMIN)) \
1200 return t->get_session_param(session, param, buf); \
1203 #define iscsi_session_attr(field, param, perm) \
1204 iscsi_session_attr_show(param, perm) \
1205 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
1208 iscsi_session_attr(targetname
, ISCSI_PARAM_TARGET_NAME
, 0);
1209 iscsi_session_attr(initial_r2t
, ISCSI_PARAM_INITIAL_R2T_EN
, 0);
1210 iscsi_session_attr(max_outstanding_r2t
, ISCSI_PARAM_MAX_R2T
, 0);
1211 iscsi_session_attr(immediate_data
, ISCSI_PARAM_IMM_DATA_EN
, 0);
1212 iscsi_session_attr(first_burst_len
, ISCSI_PARAM_FIRST_BURST
, 0);
1213 iscsi_session_attr(max_burst_len
, ISCSI_PARAM_MAX_BURST
, 0);
1214 iscsi_session_attr(data_pdu_in_order
, ISCSI_PARAM_PDU_INORDER_EN
, 0);
1215 iscsi_session_attr(data_seq_in_order
, ISCSI_PARAM_DATASEQ_INORDER_EN
, 0);
1216 iscsi_session_attr(erl
, ISCSI_PARAM_ERL
, 0);
1217 iscsi_session_attr(tpgt
, ISCSI_PARAM_TPGT
, 0);
1218 iscsi_session_attr(username
, ISCSI_PARAM_USERNAME
, 1);
1219 iscsi_session_attr(username_in
, ISCSI_PARAM_USERNAME_IN
, 1);
1220 iscsi_session_attr(password
, ISCSI_PARAM_PASSWORD
, 1);
1221 iscsi_session_attr(password_in
, ISCSI_PARAM_PASSWORD_IN
, 1);
1222 iscsi_session_attr(fast_abort
, ISCSI_PARAM_FAST_ABORT
, 1);
1224 #define iscsi_priv_session_attr_show(field, format) \
1226 show_priv_session_##field(struct class_device *cdev, char *buf) \
1228 struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev);\
1229 return sprintf(buf, format"\n", session->field); \
1232 #define iscsi_priv_session_attr(field, format) \
1233 iscsi_priv_session_attr_show(field, format) \
1234 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \
1236 iscsi_priv_session_attr(recovery_tmo
, "%d");
1241 #define iscsi_host_attr_show(param) \
1243 show_host_param_##param(struct class_device *cdev, char *buf) \
1245 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
1246 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
1247 return priv->iscsi_transport->get_host_param(shost, param, buf); \
1250 #define iscsi_host_attr(field, param) \
1251 iscsi_host_attr_show(param) \
1252 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
1255 iscsi_host_attr(netdev
, ISCSI_HOST_PARAM_NETDEV_NAME
);
1256 iscsi_host_attr(hwaddress
, ISCSI_HOST_PARAM_HWADDRESS
);
1257 iscsi_host_attr(ipaddress
, ISCSI_HOST_PARAM_IPADDRESS
);
1258 iscsi_host_attr(initiatorname
, ISCSI_HOST_PARAM_INITIATOR_NAME
);
1260 #define SETUP_PRIV_SESSION_RD_ATTR(field) \
1262 priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \
1267 #define SETUP_SESSION_RD_ATTR(field, param_flag) \
1269 if (tt->param_mask & param_flag) { \
1270 priv->session_attrs[count] = &class_device_attr_sess_##field; \
1275 #define SETUP_CONN_RD_ATTR(field, param_flag) \
1277 if (tt->param_mask & param_flag) { \
1278 priv->conn_attrs[count] = &class_device_attr_conn_##field; \
1283 #define SETUP_HOST_RD_ATTR(field, param_flag) \
1285 if (tt->host_param_mask & param_flag) { \
1286 priv->host_attrs[count] = &class_device_attr_host_##field; \
1291 static int iscsi_session_match(struct attribute_container
*cont
,
1294 struct iscsi_cls_session
*session
;
1295 struct Scsi_Host
*shost
;
1296 struct iscsi_internal
*priv
;
1298 if (!iscsi_is_session_dev(dev
))
1301 session
= iscsi_dev_to_session(dev
);
1302 shost
= iscsi_session_to_shost(session
);
1303 if (!shost
->transportt
)
1306 priv
= to_iscsi_internal(shost
->transportt
);
1307 if (priv
->session_cont
.ac
.class != &iscsi_session_class
.class)
1310 return &priv
->session_cont
.ac
== cont
;
1313 static int iscsi_conn_match(struct attribute_container
*cont
,
1316 struct iscsi_cls_session
*session
;
1317 struct iscsi_cls_conn
*conn
;
1318 struct Scsi_Host
*shost
;
1319 struct iscsi_internal
*priv
;
1321 if (!iscsi_is_conn_dev(dev
))
1324 conn
= iscsi_dev_to_conn(dev
);
1325 session
= iscsi_dev_to_session(conn
->dev
.parent
);
1326 shost
= iscsi_session_to_shost(session
);
1328 if (!shost
->transportt
)
1331 priv
= to_iscsi_internal(shost
->transportt
);
1332 if (priv
->conn_cont
.ac
.class != &iscsi_connection_class
.class)
1335 return &priv
->conn_cont
.ac
== cont
;
1338 static int iscsi_host_match(struct attribute_container
*cont
,
1341 struct Scsi_Host
*shost
;
1342 struct iscsi_internal
*priv
;
1344 if (!scsi_is_host_device(dev
))
1347 shost
= dev_to_shost(dev
);
1348 if (!shost
->transportt
||
1349 shost
->transportt
->host_attrs
.ac
.class != &iscsi_host_class
.class)
1352 priv
= to_iscsi_internal(shost
->transportt
);
1353 return &priv
->t
.host_attrs
.ac
== cont
;
1356 struct scsi_transport_template
*
1357 iscsi_register_transport(struct iscsi_transport
*tt
)
1359 struct iscsi_internal
*priv
;
1360 unsigned long flags
;
1365 priv
= iscsi_if_transport_lookup(tt
);
1369 priv
= kzalloc(sizeof(*priv
), GFP_KERNEL
);
1372 INIT_LIST_HEAD(&priv
->list
);
1373 priv
->daemon_pid
= -1;
1374 priv
->iscsi_transport
= tt
;
1375 priv
->t
.user_scan
= iscsi_user_scan
;
1377 priv
->cdev
.class = &iscsi_transport_class
;
1378 snprintf(priv
->cdev
.class_id
, BUS_ID_SIZE
, "%s", tt
->name
);
1379 err
= class_device_register(&priv
->cdev
);
1383 err
= sysfs_create_group(&priv
->cdev
.kobj
, &iscsi_transport_group
);
1385 goto unregister_cdev
;
1387 /* host parameters */
1388 priv
->t
.host_attrs
.ac
.attrs
= &priv
->host_attrs
[0];
1389 priv
->t
.host_attrs
.ac
.class = &iscsi_host_class
.class;
1390 priv
->t
.host_attrs
.ac
.match
= iscsi_host_match
;
1391 priv
->t
.host_size
= sizeof(struct iscsi_host
);
1392 transport_container_register(&priv
->t
.host_attrs
);
1394 SETUP_HOST_RD_ATTR(netdev
, ISCSI_HOST_NETDEV_NAME
);
1395 SETUP_HOST_RD_ATTR(ipaddress
, ISCSI_HOST_IPADDRESS
);
1396 SETUP_HOST_RD_ATTR(hwaddress
, ISCSI_HOST_HWADDRESS
);
1397 SETUP_HOST_RD_ATTR(initiatorname
, ISCSI_HOST_INITIATOR_NAME
);
1398 BUG_ON(count
> ISCSI_HOST_ATTRS
);
1399 priv
->host_attrs
[count
] = NULL
;
1402 /* connection parameters */
1403 priv
->conn_cont
.ac
.attrs
= &priv
->conn_attrs
[0];
1404 priv
->conn_cont
.ac
.class = &iscsi_connection_class
.class;
1405 priv
->conn_cont
.ac
.match
= iscsi_conn_match
;
1406 transport_container_register(&priv
->conn_cont
);
1408 SETUP_CONN_RD_ATTR(max_recv_dlength
, ISCSI_MAX_RECV_DLENGTH
);
1409 SETUP_CONN_RD_ATTR(max_xmit_dlength
, ISCSI_MAX_XMIT_DLENGTH
);
1410 SETUP_CONN_RD_ATTR(header_digest
, ISCSI_HDRDGST_EN
);
1411 SETUP_CONN_RD_ATTR(data_digest
, ISCSI_DATADGST_EN
);
1412 SETUP_CONN_RD_ATTR(ifmarker
, ISCSI_IFMARKER_EN
);
1413 SETUP_CONN_RD_ATTR(ofmarker
, ISCSI_OFMARKER_EN
);
1414 SETUP_CONN_RD_ATTR(address
, ISCSI_CONN_ADDRESS
);
1415 SETUP_CONN_RD_ATTR(port
, ISCSI_CONN_PORT
);
1416 SETUP_CONN_RD_ATTR(exp_statsn
, ISCSI_EXP_STATSN
);
1417 SETUP_CONN_RD_ATTR(persistent_address
, ISCSI_PERSISTENT_ADDRESS
);
1418 SETUP_CONN_RD_ATTR(persistent_port
, ISCSI_PERSISTENT_PORT
);
1420 BUG_ON(count
> ISCSI_CONN_ATTRS
);
1421 priv
->conn_attrs
[count
] = NULL
;
1424 /* session parameters */
1425 priv
->session_cont
.ac
.attrs
= &priv
->session_attrs
[0];
1426 priv
->session_cont
.ac
.class = &iscsi_session_class
.class;
1427 priv
->session_cont
.ac
.match
= iscsi_session_match
;
1428 transport_container_register(&priv
->session_cont
);
1430 SETUP_SESSION_RD_ATTR(initial_r2t
, ISCSI_INITIAL_R2T_EN
);
1431 SETUP_SESSION_RD_ATTR(max_outstanding_r2t
, ISCSI_MAX_R2T
);
1432 SETUP_SESSION_RD_ATTR(immediate_data
, ISCSI_IMM_DATA_EN
);
1433 SETUP_SESSION_RD_ATTR(first_burst_len
, ISCSI_FIRST_BURST
);
1434 SETUP_SESSION_RD_ATTR(max_burst_len
, ISCSI_MAX_BURST
);
1435 SETUP_SESSION_RD_ATTR(data_pdu_in_order
, ISCSI_PDU_INORDER_EN
);
1436 SETUP_SESSION_RD_ATTR(data_seq_in_order
, ISCSI_DATASEQ_INORDER_EN
);
1437 SETUP_SESSION_RD_ATTR(erl
, ISCSI_ERL
);
1438 SETUP_SESSION_RD_ATTR(targetname
, ISCSI_TARGET_NAME
);
1439 SETUP_SESSION_RD_ATTR(tpgt
, ISCSI_TPGT
);
1440 SETUP_SESSION_RD_ATTR(password
, ISCSI_USERNAME
);
1441 SETUP_SESSION_RD_ATTR(password_in
, ISCSI_USERNAME_IN
);
1442 SETUP_SESSION_RD_ATTR(username
, ISCSI_PASSWORD
);
1443 SETUP_SESSION_RD_ATTR(username_in
, ISCSI_PASSWORD_IN
);
1444 SETUP_SESSION_RD_ATTR(fast_abort
, ISCSI_FAST_ABORT
);
1445 SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo
);
1447 BUG_ON(count
> ISCSI_SESSION_ATTRS
);
1448 priv
->session_attrs
[count
] = NULL
;
1450 spin_lock_irqsave(&iscsi_transport_lock
, flags
);
1451 list_add(&priv
->list
, &iscsi_transports
);
1452 spin_unlock_irqrestore(&iscsi_transport_lock
, flags
);
1454 printk(KERN_NOTICE
"iscsi: registered transport (%s)\n", tt
->name
);
1458 class_device_unregister(&priv
->cdev
);
1463 EXPORT_SYMBOL_GPL(iscsi_register_transport
);
1465 int iscsi_unregister_transport(struct iscsi_transport
*tt
)
1467 struct iscsi_internal
*priv
;
1468 unsigned long flags
;
1472 mutex_lock(&rx_queue_mutex
);
1474 priv
= iscsi_if_transport_lookup(tt
);
1477 spin_lock_irqsave(&iscsi_transport_lock
, flags
);
1478 list_del(&priv
->list
);
1479 spin_unlock_irqrestore(&iscsi_transport_lock
, flags
);
1481 transport_container_unregister(&priv
->conn_cont
);
1482 transport_container_unregister(&priv
->session_cont
);
1483 transport_container_unregister(&priv
->t
.host_attrs
);
1485 sysfs_remove_group(&priv
->cdev
.kobj
, &iscsi_transport_group
);
1486 class_device_unregister(&priv
->cdev
);
1487 mutex_unlock(&rx_queue_mutex
);
1491 EXPORT_SYMBOL_GPL(iscsi_unregister_transport
);
1493 static __init
int iscsi_transport_init(void)
1497 printk(KERN_INFO
"Loading iSCSI transport class v%s.\n",
1498 ISCSI_TRANSPORT_VERSION
);
1500 atomic_set(&iscsi_session_nr
, 0);
1502 err
= class_register(&iscsi_transport_class
);
1506 err
= transport_class_register(&iscsi_host_class
);
1508 goto unregister_transport_class
;
1510 err
= transport_class_register(&iscsi_connection_class
);
1512 goto unregister_host_class
;
1514 err
= transport_class_register(&iscsi_session_class
);
1516 goto unregister_conn_class
;
1518 nls
= netlink_kernel_create(&init_net
, NETLINK_ISCSI
, 1, iscsi_if_rx
, NULL
,
1522 goto unregister_session_class
;
1525 iscsi_eh_timer_workq
= create_singlethread_workqueue("iscsi_eh");
1526 if (!iscsi_eh_timer_workq
)
1532 sock_release(nls
->sk_socket
);
1533 unregister_session_class
:
1534 transport_class_unregister(&iscsi_session_class
);
1535 unregister_conn_class
:
1536 transport_class_unregister(&iscsi_connection_class
);
1537 unregister_host_class
:
1538 transport_class_unregister(&iscsi_host_class
);
1539 unregister_transport_class
:
1540 class_unregister(&iscsi_transport_class
);
1544 static void __exit
iscsi_transport_exit(void)
1546 destroy_workqueue(iscsi_eh_timer_workq
);
1547 sock_release(nls
->sk_socket
);
1548 transport_class_unregister(&iscsi_connection_class
);
1549 transport_class_unregister(&iscsi_session_class
);
1550 transport_class_unregister(&iscsi_host_class
);
1551 class_unregister(&iscsi_transport_class
);
1554 module_init(iscsi_transport_init
);
1555 module_exit(iscsi_transport_exit
);
1557 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
1558 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
1559 "Alex Aizman <itn780@yahoo.com>");
1560 MODULE_DESCRIPTION("iSCSI Transport Interface");
1561 MODULE_LICENSE("GPL");
1562 MODULE_VERSION(ISCSI_TRANSPORT_VERSION
);