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 */
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(struct work_struct *work)
239 struct iscsi_cls_session *session =
240 container_of(work, struct iscsi_cls_session,
243 dev_printk(KERN_INFO, &session->dev, "iscsi: session recovery timed "
244 "out after %d secs\n", session->recovery_tmo);
246 if (session->transport->session_recovery_timedout)
247 session->transport->session_recovery_timedout(session);
249 scsi_target_unblock(&session->dev);
252 void iscsi_unblock_session(struct iscsi_cls_session *session)
254 if (!cancel_delayed_work(&session->recovery_work))
255 flush_scheduled_work();
256 scsi_target_unblock(&session->dev);
258 EXPORT_SYMBOL_GPL(iscsi_unblock_session);
260 void iscsi_block_session(struct iscsi_cls_session *session)
262 scsi_target_block(&session->dev);
263 schedule_delayed_work(&session->recovery_work,
264 session->recovery_tmo * HZ);
266 EXPORT_SYMBOL_GPL(iscsi_block_session);
268 struct iscsi_cls_session *
269 iscsi_alloc_session(struct Scsi_Host *shost,
270 struct iscsi_transport *transport)
272 struct iscsi_cls_session *session;
274 session = kzalloc(sizeof(*session) + transport->sessiondata_size,
279 session->transport = transport;
280 session->recovery_tmo = 120;
281 INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
282 INIT_LIST_HEAD(&session->host_list);
283 INIT_LIST_HEAD(&session->sess_list);
285 /* this is released in the dev's release function */
286 scsi_host_get(shost);
287 session->dev.parent = &shost->shost_gendev;
288 session->dev.release = iscsi_session_release;
289 device_initialize(&session->dev);
290 if (transport->sessiondata_size)
291 session->dd_data = &session[1];
294 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
296 int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
298 struct Scsi_Host *shost = iscsi_session_to_shost(session);
299 struct iscsi_host *ihost;
302 ihost = shost->shost_data;
303 session->sid = atomic_add_return(1, &iscsi_session_nr);
304 session->target_id = target_id;
306 snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u",
308 err = device_add(&session->dev);
310 dev_printk(KERN_ERR, &session->dev, "iscsi: could not "
311 "register session's dev\n");
314 transport_register_device(&session->dev);
316 mutex_lock(&ihost->mutex);
317 list_add(&session->host_list, &ihost->sessions);
318 mutex_unlock(&ihost->mutex);
322 scsi_host_put(shost);
325 EXPORT_SYMBOL_GPL(iscsi_add_session);
328 * iscsi_create_session - create iscsi class session
330 * @transport: iscsi transport
331 * @target_id: which target
333 * This can be called from a LLD or iscsi_transport.
335 struct iscsi_cls_session *
336 iscsi_create_session(struct Scsi_Host *shost,
337 struct iscsi_transport *transport,
338 unsigned int target_id)
340 struct iscsi_cls_session *session;
342 session = iscsi_alloc_session(shost, transport);
346 if (iscsi_add_session(session, target_id)) {
347 iscsi_free_session(session);
352 EXPORT_SYMBOL_GPL(iscsi_create_session);
354 void iscsi_remove_session(struct iscsi_cls_session *session)
356 struct Scsi_Host *shost = iscsi_session_to_shost(session);
357 struct iscsi_host *ihost = shost->shost_data;
359 if (!cancel_delayed_work(&session->recovery_work))
360 flush_scheduled_work();
362 mutex_lock(&ihost->mutex);
363 list_del(&session->host_list);
364 mutex_unlock(&ihost->mutex);
366 scsi_remove_target(&session->dev);
368 transport_unregister_device(&session->dev);
369 device_del(&session->dev);
371 EXPORT_SYMBOL_GPL(iscsi_remove_session);
373 void iscsi_free_session(struct iscsi_cls_session *session)
375 put_device(&session->dev);
378 EXPORT_SYMBOL_GPL(iscsi_free_session);
381 * iscsi_destroy_session - destroy iscsi session
382 * @session: iscsi_session
384 * Can be called by a LLD or iscsi_transport. There must not be
385 * any running connections.
387 int iscsi_destroy_session(struct iscsi_cls_session *session)
389 iscsi_remove_session(session);
390 iscsi_free_session(session);
393 EXPORT_SYMBOL_GPL(iscsi_destroy_session);
395 static void iscsi_conn_release(struct device *dev)
397 struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
398 struct device *parent = conn->dev.parent;
404 static int iscsi_is_conn_dev(const struct device *dev)
406 return dev->release == iscsi_conn_release;
410 * iscsi_create_conn - create iscsi class connection
411 * @session: iscsi cls session
412 * @cid: connection id
414 * This can be called from a LLD or iscsi_transport. The connection
415 * is child of the session so cid must be unique for all connections
418 * Since we do not support MCS, cid will normally be zero. In some cases
419 * for software iscsi we could be trying to preallocate a connection struct
420 * in which case there could be two connection structs and cid would be
423 struct iscsi_cls_conn *
424 iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid)
426 struct iscsi_transport *transport = session->transport;
427 struct iscsi_cls_conn *conn;
430 conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL);
434 if (transport->conndata_size)
435 conn->dd_data = &conn[1];
437 INIT_LIST_HEAD(&conn->conn_list);
438 conn->transport = transport;
441 /* this is released in the dev's release function */
442 if (!get_device(&session->dev))
445 snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u",
447 conn->dev.parent = &session->dev;
448 conn->dev.release = iscsi_conn_release;
449 err = device_register(&conn->dev);
451 dev_printk(KERN_ERR, &conn->dev, "iscsi: could not register "
452 "connection's dev\n");
453 goto release_parent_ref;
455 transport_register_device(&conn->dev);
459 put_device(&session->dev);
465 EXPORT_SYMBOL_GPL(iscsi_create_conn);
468 * iscsi_destroy_conn - destroy iscsi class connection
469 * @conn: iscsi cls session
471 * This can be called from an LLD or iscsi_transport.
473 int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
475 transport_unregister_device(&conn->dev);
476 device_unregister(&conn->dev);
480 EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
483 * iscsi interface functions
485 static struct iscsi_internal *
486 iscsi_if_transport_lookup(struct iscsi_transport *tt)
488 struct iscsi_internal *priv;
491 spin_lock_irqsave(&iscsi_transport_lock, flags);
492 list_for_each_entry(priv, &iscsi_transports, list) {
493 if (tt == priv->iscsi_transport) {
494 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
498 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
503 iscsi_broadcast_skb(struct sk_buff *skb, gfp_t gfp)
507 rc = netlink_broadcast(nls, skb, 0, 1, gfp);
509 printk(KERN_ERR "iscsi: can not broadcast skb (%d)\n", rc);
517 iscsi_unicast_skb(struct sk_buff *skb, int pid)
521 rc = netlink_unicast(nls, skb, pid, MSG_DONTWAIT);
523 printk(KERN_ERR "iscsi: can not unicast skb (%d)\n", rc);
530 int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
531 char *data, uint32_t data_size)
533 struct nlmsghdr *nlh;
535 struct iscsi_uevent *ev;
537 struct iscsi_internal *priv;
538 int len = NLMSG_SPACE(sizeof(*ev) + sizeof(struct iscsi_hdr) +
541 priv = iscsi_if_transport_lookup(conn->transport);
545 skb = alloc_skb(len, GFP_ATOMIC);
547 iscsi_conn_error(conn, ISCSI_ERR_CONN_FAILED);
548 dev_printk(KERN_ERR, &conn->dev, "iscsi: can not deliver "
549 "control PDU: OOM\n");
553 nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
554 ev = NLMSG_DATA(nlh);
555 memset(ev, 0, sizeof(*ev));
556 ev->transport_handle = iscsi_handle(conn->transport);
557 ev->type = ISCSI_KEVENT_RECV_PDU;
558 ev->r.recv_req.cid = conn->cid;
559 ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
560 pdu = (char*)ev + sizeof(*ev);
561 memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
562 memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
564 return iscsi_unicast_skb(skb, priv->daemon_pid);
566 EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
568 void iscsi_conn_error(struct iscsi_cls_conn *conn, enum iscsi_err error)
570 struct nlmsghdr *nlh;
572 struct iscsi_uevent *ev;
573 struct iscsi_internal *priv;
574 int len = NLMSG_SPACE(sizeof(*ev));
576 priv = iscsi_if_transport_lookup(conn->transport);
580 skb = alloc_skb(len, GFP_ATOMIC);
582 dev_printk(KERN_ERR, &conn->dev, "iscsi: gracefully ignored "
583 "conn error (%d)\n", error);
587 nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
588 ev = NLMSG_DATA(nlh);
589 ev->transport_handle = iscsi_handle(conn->transport);
590 ev->type = ISCSI_KEVENT_CONN_ERROR;
591 ev->r.connerror.error = error;
592 ev->r.connerror.cid = conn->cid;
593 ev->r.connerror.sid = iscsi_conn_get_sid(conn);
595 iscsi_broadcast_skb(skb, GFP_ATOMIC);
597 dev_printk(KERN_INFO, &conn->dev, "iscsi: detected conn error (%d)\n",
600 EXPORT_SYMBOL_GPL(iscsi_conn_error);
603 iscsi_if_send_reply(int pid, int seq, int type, int done, int multi,
604 void *payload, int size)
607 struct nlmsghdr *nlh;
608 int len = NLMSG_SPACE(size);
609 int flags = multi ? NLM_F_MULTI : 0;
610 int t = done ? NLMSG_DONE : type;
612 skb = alloc_skb(len, GFP_ATOMIC);
614 printk(KERN_ERR "Could not allocate skb to send reply.\n");
618 nlh = __nlmsg_put(skb, pid, seq, t, (len - sizeof(*nlh)), 0);
619 nlh->nlmsg_flags = flags;
620 memcpy(NLMSG_DATA(nlh), payload, size);
621 return iscsi_unicast_skb(skb, pid);
625 iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
627 struct iscsi_uevent *ev = NLMSG_DATA(nlh);
628 struct iscsi_stats *stats;
629 struct sk_buff *skbstat;
630 struct iscsi_cls_conn *conn;
631 struct nlmsghdr *nlhstat;
632 struct iscsi_uevent *evstat;
633 struct iscsi_internal *priv;
634 int len = NLMSG_SPACE(sizeof(*ev) +
635 sizeof(struct iscsi_stats) +
636 sizeof(struct iscsi_stats_custom) *
637 ISCSI_STATS_CUSTOM_MAX);
640 priv = iscsi_if_transport_lookup(transport);
644 conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
651 skbstat = alloc_skb(len, GFP_ATOMIC);
653 dev_printk(KERN_ERR, &conn->dev, "iscsi: can not "
654 "deliver stats: OOM\n");
658 nlhstat = __nlmsg_put(skbstat, priv->daemon_pid, 0, 0,
659 (len - sizeof(*nlhstat)), 0);
660 evstat = NLMSG_DATA(nlhstat);
661 memset(evstat, 0, sizeof(*evstat));
662 evstat->transport_handle = iscsi_handle(conn->transport);
663 evstat->type = nlh->nlmsg_type;
664 evstat->u.get_stats.cid =
666 evstat->u.get_stats.sid =
668 stats = (struct iscsi_stats *)
669 ((char*)evstat + sizeof(*evstat));
670 memset(stats, 0, sizeof(*stats));
672 transport->get_stats(conn, stats);
673 actual_size = NLMSG_SPACE(sizeof(struct iscsi_uevent) +
674 sizeof(struct iscsi_stats) +
675 sizeof(struct iscsi_stats_custom) *
676 stats->custom_length);
677 actual_size -= sizeof(*nlhstat);
678 actual_size = NLMSG_LENGTH(actual_size);
679 skb_trim(skbstat, NLMSG_ALIGN(actual_size));
680 nlhstat->nlmsg_len = actual_size;
682 err = iscsi_unicast_skb(skbstat, priv->daemon_pid);
683 } while (err < 0 && err != -ECONNREFUSED);
689 * iscsi_if_destroy_session_done - send session destr. completion event
690 * @conn: last connection for session
692 * This is called by HW iscsi LLDs to notify userpsace that its HW has
695 int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn)
697 struct iscsi_internal *priv;
698 struct iscsi_cls_session *session;
699 struct Scsi_Host *shost;
700 struct iscsi_uevent *ev;
702 struct nlmsghdr *nlh;
704 int rc, len = NLMSG_SPACE(sizeof(*ev));
706 priv = iscsi_if_transport_lookup(conn->transport);
710 session = iscsi_dev_to_session(conn->dev.parent);
711 shost = iscsi_session_to_shost(session);
713 skb = alloc_skb(len, GFP_KERNEL);
715 dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of "
716 "session creation event\n");
720 nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
721 ev = NLMSG_DATA(nlh);
722 ev->transport_handle = iscsi_handle(conn->transport);
723 ev->type = ISCSI_KEVENT_DESTROY_SESSION;
724 ev->r.d_session.host_no = shost->host_no;
725 ev->r.d_session.sid = session->sid;
728 * this will occur if the daemon is not up, so we just warn
729 * the user and when the daemon is restarted it will handle it
731 rc = iscsi_broadcast_skb(skb, GFP_KERNEL);
733 dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of "
734 "session destruction event. Check iscsi daemon\n");
736 spin_lock_irqsave(&sesslock, flags);
737 list_del(&session->sess_list);
738 spin_unlock_irqrestore(&sesslock, flags);
740 spin_lock_irqsave(&connlock, flags);
742 list_del(&conn->conn_list);
743 spin_unlock_irqrestore(&connlock, flags);
747 EXPORT_SYMBOL_GPL(iscsi_if_destroy_session_done);
750 * iscsi_if_create_session_done - send session creation completion event
751 * @conn: leading connection for session
753 * This is called by HW iscsi LLDs to notify userpsace that its HW has
754 * created a session or a existing session is back in the logged in state.
756 int iscsi_if_create_session_done(struct iscsi_cls_conn *conn)
758 struct iscsi_internal *priv;
759 struct iscsi_cls_session *session;
760 struct Scsi_Host *shost;
761 struct iscsi_uevent *ev;
763 struct nlmsghdr *nlh;
765 int rc, len = NLMSG_SPACE(sizeof(*ev));
767 priv = iscsi_if_transport_lookup(conn->transport);
771 session = iscsi_dev_to_session(conn->dev.parent);
772 shost = iscsi_session_to_shost(session);
774 skb = alloc_skb(len, GFP_KERNEL);
776 dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of "
777 "session creation event\n");
781 nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0);
782 ev = NLMSG_DATA(nlh);
783 ev->transport_handle = iscsi_handle(conn->transport);
784 ev->type = ISCSI_UEVENT_CREATE_SESSION;
785 ev->r.c_session_ret.host_no = shost->host_no;
786 ev->r.c_session_ret.sid = session->sid;
789 * this will occur if the daemon is not up, so we just warn
790 * the user and when the daemon is restarted it will handle it
792 rc = iscsi_broadcast_skb(skb, GFP_KERNEL);
794 dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of "
795 "session creation event. Check iscsi daemon\n");
797 spin_lock_irqsave(&sesslock, flags);
798 list_add(&session->sess_list, &sesslist);
799 spin_unlock_irqrestore(&sesslock, flags);
801 spin_lock_irqsave(&connlock, flags);
802 list_add(&conn->conn_list, &connlist);
804 spin_unlock_irqrestore(&connlock, flags);
807 EXPORT_SYMBOL_GPL(iscsi_if_create_session_done);
810 iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev)
812 struct iscsi_transport *transport = priv->iscsi_transport;
813 struct iscsi_cls_session *session;
817 session = transport->create_session(transport, &priv->t,
818 ev->u.c_session.cmds_max,
819 ev->u.c_session.queue_depth,
820 ev->u.c_session.initial_cmdsn,
825 spin_lock_irqsave(&sesslock, flags);
826 list_add(&session->sess_list, &sesslist);
827 spin_unlock_irqrestore(&sesslock, flags);
829 ev->r.c_session_ret.host_no = hostno;
830 ev->r.c_session_ret.sid = session->sid;
835 iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
837 struct iscsi_cls_conn *conn;
838 struct iscsi_cls_session *session;
841 session = iscsi_session_lookup(ev->u.c_conn.sid);
843 printk(KERN_ERR "iscsi: invalid session %d\n",
848 conn = transport->create_conn(session, ev->u.c_conn.cid);
850 printk(KERN_ERR "iscsi: couldn't create a new "
851 "connection for session %d\n",
856 ev->r.c_conn_ret.sid = session->sid;
857 ev->r.c_conn_ret.cid = conn->cid;
859 spin_lock_irqsave(&connlock, flags);
860 list_add(&conn->conn_list, &connlist);
862 spin_unlock_irqrestore(&connlock, flags);
868 iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
871 struct iscsi_cls_conn *conn;
873 conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
876 spin_lock_irqsave(&connlock, flags);
878 list_del(&conn->conn_list);
879 spin_unlock_irqrestore(&connlock, flags);
881 if (transport->destroy_conn)
882 transport->destroy_conn(conn);
887 iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
889 char *data = (char*)ev + sizeof(*ev);
890 struct iscsi_cls_conn *conn;
891 struct iscsi_cls_session *session;
892 int err = 0, value = 0;
894 session = iscsi_session_lookup(ev->u.set_param.sid);
895 conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
896 if (!conn || !session)
899 switch (ev->u.set_param.param) {
900 case ISCSI_PARAM_SESS_RECOVERY_TMO:
901 sscanf(data, "%d", &value);
903 session->recovery_tmo = value;
906 err = transport->set_param(conn, ev->u.set_param.param,
907 data, ev->u.set_param.len);
914 iscsi_if_transport_ep(struct iscsi_transport *transport,
915 struct iscsi_uevent *ev, int msg_type)
917 struct sockaddr *dst_addr;
921 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
922 if (!transport->ep_connect)
925 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
926 rc = transport->ep_connect(dst_addr,
927 ev->u.ep_connect.non_blocking,
928 &ev->r.ep_connect_ret.handle);
930 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
931 if (!transport->ep_poll)
934 ev->r.retcode = transport->ep_poll(ev->u.ep_poll.ep_handle,
935 ev->u.ep_poll.timeout_ms);
937 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
938 if (!transport->ep_disconnect)
941 transport->ep_disconnect(ev->u.ep_disconnect.ep_handle);
948 iscsi_tgt_dscvr(struct iscsi_transport *transport,
949 struct iscsi_uevent *ev)
951 struct Scsi_Host *shost;
952 struct sockaddr *dst_addr;
955 if (!transport->tgt_dscvr)
958 shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
960 printk(KERN_ERR "target discovery could not find host no %u\n",
961 ev->u.tgt_dscvr.host_no);
966 dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
967 err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
968 ev->u.tgt_dscvr.enable, dst_addr);
969 scsi_host_put(shost);
974 iscsi_set_host_param(struct iscsi_transport *transport,
975 struct iscsi_uevent *ev)
977 char *data = (char*)ev + sizeof(*ev);
978 struct Scsi_Host *shost;
981 if (!transport->set_host_param)
984 shost = scsi_host_lookup(ev->u.set_host_param.host_no);
986 printk(KERN_ERR "set_host_param could not find host no %u\n",
987 ev->u.set_host_param.host_no);
991 err = transport->set_host_param(shost, ev->u.set_host_param.param,
992 data, ev->u.set_host_param.len);
993 scsi_host_put(shost);
998 iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1001 struct iscsi_uevent *ev = NLMSG_DATA(nlh);
1002 struct iscsi_transport *transport = NULL;
1003 struct iscsi_internal *priv;
1004 struct iscsi_cls_session *session;
1005 struct iscsi_cls_conn *conn;
1006 unsigned long flags;
1008 priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
1011 transport = priv->iscsi_transport;
1013 if (!try_module_get(transport->owner))
1016 priv->daemon_pid = NETLINK_CREDS(skb)->pid;
1018 switch (nlh->nlmsg_type) {
1019 case ISCSI_UEVENT_CREATE_SESSION:
1020 err = iscsi_if_create_session(priv, ev);
1022 case ISCSI_UEVENT_DESTROY_SESSION:
1023 session = iscsi_session_lookup(ev->u.d_session.sid);
1025 spin_lock_irqsave(&sesslock, flags);
1026 list_del(&session->sess_list);
1027 spin_unlock_irqrestore(&sesslock, flags);
1029 transport->destroy_session(session);
1033 case ISCSI_UEVENT_CREATE_CONN:
1034 err = iscsi_if_create_conn(transport, ev);
1036 case ISCSI_UEVENT_DESTROY_CONN:
1037 err = iscsi_if_destroy_conn(transport, ev);
1039 case ISCSI_UEVENT_BIND_CONN:
1040 session = iscsi_session_lookup(ev->u.b_conn.sid);
1041 conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
1043 if (session && conn)
1044 ev->r.retcode = transport->bind_conn(session, conn,
1045 ev->u.b_conn.transport_eph,
1046 ev->u.b_conn.is_leading);
1050 case ISCSI_UEVENT_SET_PARAM:
1051 err = iscsi_set_param(transport, ev);
1053 case ISCSI_UEVENT_START_CONN:
1054 conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
1056 ev->r.retcode = transport->start_conn(conn);
1060 case ISCSI_UEVENT_STOP_CONN:
1061 conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
1063 transport->stop_conn(conn, ev->u.stop_conn.flag);
1067 case ISCSI_UEVENT_SEND_PDU:
1068 conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
1070 ev->r.retcode = transport->send_pdu(conn,
1071 (struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
1072 (char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
1073 ev->u.send_pdu.data_size);
1077 case ISCSI_UEVENT_GET_STATS:
1078 err = iscsi_if_get_stats(transport, nlh);
1080 case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
1081 case ISCSI_UEVENT_TRANSPORT_EP_POLL:
1082 case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
1083 err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
1085 case ISCSI_UEVENT_TGT_DSCVR:
1086 err = iscsi_tgt_dscvr(transport, ev);
1088 case ISCSI_UEVENT_SET_HOST_PARAM:
1089 err = iscsi_set_host_param(transport, ev);
1096 module_put(transport->owner);
1101 * Get message from skb. Each message is processed by iscsi_if_recv_msg.
1102 * Malformed skbs with wrong lengths or invalid creds are not processed.
1105 iscsi_if_rx(struct sk_buff *skb)
1107 mutex_lock(&rx_queue_mutex);
1108 while (skb->len >= NLMSG_SPACE(0)) {
1111 struct nlmsghdr *nlh;
1112 struct iscsi_uevent *ev;
1114 nlh = nlmsg_hdr(skb);
1115 if (nlh->nlmsg_len < sizeof(*nlh) ||
1116 skb->len < nlh->nlmsg_len) {
1120 ev = NLMSG_DATA(nlh);
1121 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
1122 if (rlen > skb->len)
1125 err = iscsi_if_recv_msg(skb, nlh);
1127 ev->type = ISCSI_KEVENT_IF_ERROR;
1132 * special case for GET_STATS:
1133 * on success - sending reply and stats from
1134 * inside of if_recv_msg(),
1135 * on error - fall through.
1137 if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
1139 err = iscsi_if_send_reply(
1140 NETLINK_CREDS(skb)->pid, nlh->nlmsg_seq,
1141 nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
1142 } while (err < 0 && err != -ECONNREFUSED);
1143 skb_pull(skb, rlen);
1145 mutex_unlock(&rx_queue_mutex);
1148 #define iscsi_cdev_to_conn(_cdev) \
1149 iscsi_dev_to_conn(_cdev->dev)
1151 #define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
1152 struct class_device_attribute class_device_attr_##_prefix##_##_name = \
1153 __ATTR(_name,_mode,_show,_store)
1156 * iSCSI connection attrs
1158 #define iscsi_conn_attr_show(param) \
1160 show_conn_param_##param(struct class_device *cdev, char *buf) \
1162 struct iscsi_cls_conn *conn = iscsi_cdev_to_conn(cdev); \
1163 struct iscsi_transport *t = conn->transport; \
1164 return t->get_conn_param(conn, param, buf); \
1167 #define iscsi_conn_attr(field, param) \
1168 iscsi_conn_attr_show(param) \
1169 static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
1172 iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
1173 iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
1174 iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
1175 iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
1176 iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
1177 iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
1178 iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
1179 iscsi_conn_attr(port, ISCSI_PARAM_CONN_PORT);
1180 iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
1181 iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
1182 iscsi_conn_attr(address, ISCSI_PARAM_CONN_ADDRESS);
1184 #define iscsi_cdev_to_session(_cdev) \
1185 iscsi_dev_to_session(_cdev->dev)
1188 * iSCSI session attrs
1190 #define iscsi_session_attr_show(param, perm) \
1192 show_session_param_##param(struct class_device *cdev, char *buf) \
1194 struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev); \
1195 struct iscsi_transport *t = session->transport; \
1197 if (perm && !capable(CAP_SYS_ADMIN)) \
1199 return t->get_session_param(session, param, buf); \
1202 #define iscsi_session_attr(field, param, perm) \
1203 iscsi_session_attr_show(param, perm) \
1204 static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
1207 iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
1208 iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
1209 iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
1210 iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
1211 iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
1212 iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
1213 iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
1214 iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
1215 iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
1216 iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
1217 iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
1218 iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
1219 iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
1220 iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
1221 iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 1);
1223 #define iscsi_priv_session_attr_show(field, format) \
1225 show_priv_session_##field(struct class_device *cdev, char *buf) \
1227 struct iscsi_cls_session *session = iscsi_cdev_to_session(cdev);\
1228 return sprintf(buf, format"\n", session->field); \
1231 #define iscsi_priv_session_attr(field, format) \
1232 iscsi_priv_session_attr_show(field, format) \
1233 static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO, show_priv_session_##field, \
1235 iscsi_priv_session_attr(recovery_tmo, "%d");
1240 #define iscsi_host_attr_show(param) \
1242 show_host_param_##param(struct class_device *cdev, char *buf) \
1244 struct Scsi_Host *shost = transport_class_to_shost(cdev); \
1245 struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
1246 return priv->iscsi_transport->get_host_param(shost, param, buf); \
1249 #define iscsi_host_attr(field, param) \
1250 iscsi_host_attr_show(param) \
1251 static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
1254 iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
1255 iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
1256 iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
1257 iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
1259 #define SETUP_PRIV_SESSION_RD_ATTR(field) \
1261 priv->session_attrs[count] = &class_device_attr_priv_sess_##field; \
1266 #define SETUP_SESSION_RD_ATTR(field, param_flag) \
1268 if (tt->param_mask & param_flag) { \
1269 priv->session_attrs[count] = &class_device_attr_sess_##field; \
1274 #define SETUP_CONN_RD_ATTR(field, param_flag) \
1276 if (tt->param_mask & param_flag) { \
1277 priv->conn_attrs[count] = &class_device_attr_conn_##field; \
1282 #define SETUP_HOST_RD_ATTR(field, param_flag) \
1284 if (tt->host_param_mask & param_flag) { \
1285 priv->host_attrs[count] = &class_device_attr_host_##field; \
1290 static int iscsi_session_match(struct attribute_container *cont,
1293 struct iscsi_cls_session *session;
1294 struct Scsi_Host *shost;
1295 struct iscsi_internal *priv;
1297 if (!iscsi_is_session_dev(dev))
1300 session = iscsi_dev_to_session(dev);
1301 shost = iscsi_session_to_shost(session);
1302 if (!shost->transportt)
1305 priv = to_iscsi_internal(shost->transportt);
1306 if (priv->session_cont.ac.class != &iscsi_session_class.class)
1309 return &priv->session_cont.ac == cont;
1312 static int iscsi_conn_match(struct attribute_container *cont,
1315 struct iscsi_cls_session *session;
1316 struct iscsi_cls_conn *conn;
1317 struct Scsi_Host *shost;
1318 struct iscsi_internal *priv;
1320 if (!iscsi_is_conn_dev(dev))
1323 conn = iscsi_dev_to_conn(dev);
1324 session = iscsi_dev_to_session(conn->dev.parent);
1325 shost = iscsi_session_to_shost(session);
1327 if (!shost->transportt)
1330 priv = to_iscsi_internal(shost->transportt);
1331 if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
1334 return &priv->conn_cont.ac == cont;
1337 static int iscsi_host_match(struct attribute_container *cont,
1340 struct Scsi_Host *shost;
1341 struct iscsi_internal *priv;
1343 if (!scsi_is_host_device(dev))
1346 shost = dev_to_shost(dev);
1347 if (!shost->transportt ||
1348 shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
1351 priv = to_iscsi_internal(shost->transportt);
1352 return &priv->t.host_attrs.ac == cont;
1355 struct scsi_transport_template *
1356 iscsi_register_transport(struct iscsi_transport *tt)
1358 struct iscsi_internal *priv;
1359 unsigned long flags;
1364 priv = iscsi_if_transport_lookup(tt);
1368 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1371 INIT_LIST_HEAD(&priv->list);
1372 priv->daemon_pid = -1;
1373 priv->iscsi_transport = tt;
1374 priv->t.user_scan = iscsi_user_scan;
1376 priv->cdev.class = &iscsi_transport_class;
1377 snprintf(priv->cdev.class_id, BUS_ID_SIZE, "%s", tt->name);
1378 err = class_device_register(&priv->cdev);
1382 err = sysfs_create_group(&priv->cdev.kobj, &iscsi_transport_group);
1384 goto unregister_cdev;
1386 /* host parameters */
1387 priv->t.host_attrs.ac.attrs = &priv->host_attrs[0];
1388 priv->t.host_attrs.ac.class = &iscsi_host_class.class;
1389 priv->t.host_attrs.ac.match = iscsi_host_match;
1390 priv->t.host_size = sizeof(struct iscsi_host);
1391 transport_container_register(&priv->t.host_attrs);
1393 SETUP_HOST_RD_ATTR(netdev, ISCSI_HOST_NETDEV_NAME);
1394 SETUP_HOST_RD_ATTR(ipaddress, ISCSI_HOST_IPADDRESS);
1395 SETUP_HOST_RD_ATTR(hwaddress, ISCSI_HOST_HWADDRESS);
1396 SETUP_HOST_RD_ATTR(initiatorname, ISCSI_HOST_INITIATOR_NAME);
1397 BUG_ON(count > ISCSI_HOST_ATTRS);
1398 priv->host_attrs[count] = NULL;
1401 /* connection parameters */
1402 priv->conn_cont.ac.attrs = &priv->conn_attrs[0];
1403 priv->conn_cont.ac.class = &iscsi_connection_class.class;
1404 priv->conn_cont.ac.match = iscsi_conn_match;
1405 transport_container_register(&priv->conn_cont);
1407 SETUP_CONN_RD_ATTR(max_recv_dlength, ISCSI_MAX_RECV_DLENGTH);
1408 SETUP_CONN_RD_ATTR(max_xmit_dlength, ISCSI_MAX_XMIT_DLENGTH);
1409 SETUP_CONN_RD_ATTR(header_digest, ISCSI_HDRDGST_EN);
1410 SETUP_CONN_RD_ATTR(data_digest, ISCSI_DATADGST_EN);
1411 SETUP_CONN_RD_ATTR(ifmarker, ISCSI_IFMARKER_EN);
1412 SETUP_CONN_RD_ATTR(ofmarker, ISCSI_OFMARKER_EN);
1413 SETUP_CONN_RD_ATTR(address, ISCSI_CONN_ADDRESS);
1414 SETUP_CONN_RD_ATTR(port, ISCSI_CONN_PORT);
1415 SETUP_CONN_RD_ATTR(exp_statsn, ISCSI_EXP_STATSN);
1416 SETUP_CONN_RD_ATTR(persistent_address, ISCSI_PERSISTENT_ADDRESS);
1417 SETUP_CONN_RD_ATTR(persistent_port, ISCSI_PERSISTENT_PORT);
1419 BUG_ON(count > ISCSI_CONN_ATTRS);
1420 priv->conn_attrs[count] = NULL;
1423 /* session parameters */
1424 priv->session_cont.ac.attrs = &priv->session_attrs[0];
1425 priv->session_cont.ac.class = &iscsi_session_class.class;
1426 priv->session_cont.ac.match = iscsi_session_match;
1427 transport_container_register(&priv->session_cont);
1429 SETUP_SESSION_RD_ATTR(initial_r2t, ISCSI_INITIAL_R2T_EN);
1430 SETUP_SESSION_RD_ATTR(max_outstanding_r2t, ISCSI_MAX_R2T);
1431 SETUP_SESSION_RD_ATTR(immediate_data, ISCSI_IMM_DATA_EN);
1432 SETUP_SESSION_RD_ATTR(first_burst_len, ISCSI_FIRST_BURST);
1433 SETUP_SESSION_RD_ATTR(max_burst_len, ISCSI_MAX_BURST);
1434 SETUP_SESSION_RD_ATTR(data_pdu_in_order, ISCSI_PDU_INORDER_EN);
1435 SETUP_SESSION_RD_ATTR(data_seq_in_order, ISCSI_DATASEQ_INORDER_EN);
1436 SETUP_SESSION_RD_ATTR(erl, ISCSI_ERL);
1437 SETUP_SESSION_RD_ATTR(targetname, ISCSI_TARGET_NAME);
1438 SETUP_SESSION_RD_ATTR(tpgt, ISCSI_TPGT);
1439 SETUP_SESSION_RD_ATTR(password, ISCSI_USERNAME);
1440 SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN);
1441 SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD);
1442 SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN);
1443 SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT);
1444 SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo);
1446 BUG_ON(count > ISCSI_SESSION_ATTRS);
1447 priv->session_attrs[count] = NULL;
1449 spin_lock_irqsave(&iscsi_transport_lock, flags);
1450 list_add(&priv->list, &iscsi_transports);
1451 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
1453 printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
1457 class_device_unregister(&priv->cdev);
1462 EXPORT_SYMBOL_GPL(iscsi_register_transport);
1464 int iscsi_unregister_transport(struct iscsi_transport *tt)
1466 struct iscsi_internal *priv;
1467 unsigned long flags;
1471 mutex_lock(&rx_queue_mutex);
1473 priv = iscsi_if_transport_lookup(tt);
1476 spin_lock_irqsave(&iscsi_transport_lock, flags);
1477 list_del(&priv->list);
1478 spin_unlock_irqrestore(&iscsi_transport_lock, flags);
1480 transport_container_unregister(&priv->conn_cont);
1481 transport_container_unregister(&priv->session_cont);
1482 transport_container_unregister(&priv->t.host_attrs);
1484 sysfs_remove_group(&priv->cdev.kobj, &iscsi_transport_group);
1485 class_device_unregister(&priv->cdev);
1486 mutex_unlock(&rx_queue_mutex);
1490 EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
1492 static __init int iscsi_transport_init(void)
1496 printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
1497 ISCSI_TRANSPORT_VERSION);
1499 atomic_set(&iscsi_session_nr, 0);
1501 err = class_register(&iscsi_transport_class);
1505 err = transport_class_register(&iscsi_host_class);
1507 goto unregister_transport_class;
1509 err = transport_class_register(&iscsi_connection_class);
1511 goto unregister_host_class;
1513 err = transport_class_register(&iscsi_session_class);
1515 goto unregister_conn_class;
1517 nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, 1, iscsi_if_rx, NULL,
1521 goto unregister_session_class;
1526 unregister_session_class:
1527 transport_class_unregister(&iscsi_session_class);
1528 unregister_conn_class:
1529 transport_class_unregister(&iscsi_connection_class);
1530 unregister_host_class:
1531 transport_class_unregister(&iscsi_host_class);
1532 unregister_transport_class:
1533 class_unregister(&iscsi_transport_class);
1537 static void __exit iscsi_transport_exit(void)
1539 sock_release(nls->sk_socket);
1540 transport_class_unregister(&iscsi_connection_class);
1541 transport_class_unregister(&iscsi_session_class);
1542 transport_class_unregister(&iscsi_host_class);
1543 class_unregister(&iscsi_transport_class);
1546 module_init(iscsi_transport_init);
1547 module_exit(iscsi_transport_exit);
1549 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
1550 "Dmitry Yusupov <dmitry_yus@yahoo.com>, "
1551 "Alex Aizman <itn780@yahoo.com>");
1552 MODULE_DESCRIPTION("iSCSI Transport Interface");
1553 MODULE_LICENSE("GPL");
1554 MODULE_VERSION(ISCSI_TRANSPORT_VERSION);