diff options
| -rw-r--r-- | drivers/scsi/libiscsi.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/qla4xxx/ql4_init.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/qla4xxx/ql4_os.c | 7 | ||||
| -rw-r--r-- | drivers/scsi/scsi_transport_iscsi.c | 289 | ||||
| -rw-r--r-- | include/scsi/iscsi_if.h | 7 | ||||
| -rw-r--r-- | include/scsi/iscsi_proto.h | 2 | ||||
| -rw-r--r-- | include/scsi/scsi_transport_iscsi.h | 7 |
7 files changed, 176 insertions, 144 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 441e351b445..5205ef2c29b 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -1662,7 +1662,7 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session) struct iscsi_session *session = iscsi_hostdata(shost->hostdata); struct module *owner = cls_session->transport->owner; - iscsi_unblock_session(cls_session); + iscsi_remove_session(cls_session); scsi_remove_host(shost); iscsi_pool_free(&session->mgmtpool); @@ -1677,7 +1677,7 @@ void iscsi_session_teardown(struct iscsi_cls_session *cls_session) kfree(session->hwaddress); kfree(session->initiatorname); - iscsi_destroy_session(cls_session); + iscsi_free_session(cls_session); scsi_host_put(shost); module_put(owner); } diff --git a/drivers/scsi/qla4xxx/ql4_init.c b/drivers/scsi/qla4xxx/ql4_init.c index d692c713416..cbe0a17ced5 100644 --- a/drivers/scsi/qla4xxx/ql4_init.c +++ b/drivers/scsi/qla4xxx/ql4_init.c @@ -5,6 +5,7 @@ * See LICENSE.qla4xxx for copyright and licensing details. */ +#include <scsi/iscsi_if.h> #include "ql4_def.h" #include "ql4_glbl.h" #include "ql4_dbg.h" @@ -1305,7 +1306,8 @@ int qla4xxx_process_ddb_changed(struct scsi_qla_host *ha, atomic_set(&ddb_entry->relogin_timer, 0); clear_bit(DF_RELOGIN, &ddb_entry->flags); clear_bit(DF_NO_RELOGIN, &ddb_entry->flags); - iscsi_if_create_session_done(ddb_entry->conn); + iscsi_session_event(ddb_entry->sess, + ISCSI_KEVENT_CREATE_SESSION); /* * Change the lun state to READY in case the lun TIMEOUT before * the device came back. diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index 89460d27c68..f55b9f7d939 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -298,8 +298,7 @@ void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry) return; if (ddb_entry->conn) { - iscsi_if_destroy_session_done(ddb_entry->conn); - iscsi_destroy_conn(ddb_entry->conn); + atomic_set(&ddb_entry->state, DDB_STATE_DEAD); iscsi_remove_session(ddb_entry->sess); } iscsi_free_session(ddb_entry->sess); @@ -309,6 +308,7 @@ int qla4xxx_add_sess(struct ddb_entry *ddb_entry) { int err; + ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count; err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index); if (err) { DEBUG2(printk(KERN_ERR "Could not add session.\n")); @@ -321,9 +321,6 @@ int qla4xxx_add_sess(struct ddb_entry *ddb_entry) DEBUG2(printk(KERN_ERR "Could not add connection.\n")); return -ENOMEM; } - - ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count; - iscsi_if_create_session_done(ddb_entry->conn); return 0; } diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 9cc2cc8e87b..b82139dc483 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -116,6 +116,8 @@ static struct attribute_group iscsi_transport_group = { .attrs = iscsi_transport_attrs, }; + + static int iscsi_setup_host(struct transport_container *tc, struct device *dev, struct class_device *cdev) { @@ -125,13 +127,30 @@ static int iscsi_setup_host(struct transport_container *tc, struct device *dev, memset(ihost, 0, sizeof(*ihost)); INIT_LIST_HEAD(&ihost->sessions); mutex_init(&ihost->mutex); + + snprintf(ihost->unbind_workq_name, KOBJ_NAME_LEN, "iscsi_unbind_%d", + shost->host_no); + ihost->unbind_workq = create_singlethread_workqueue( + ihost->unbind_workq_name); + if (!ihost->unbind_workq) + return -ENOMEM; + return 0; +} + +static int iscsi_remove_host(struct transport_container *tc, struct device *dev, + struct class_device *cdev) +{ + struct Scsi_Host *shost = dev_to_shost(dev); + struct iscsi_host *ihost = shost->shost_data; + + destroy_workqueue(ihost->unbind_workq); return 0; } static DECLARE_TRANSPORT_CLASS(iscsi_host_class, "iscsi_host", iscsi_setup_host, - NULL, + iscsi_remove_host, NULL); static DECLARE_TRANSPORT_CLASS(iscsi_session_class, @@ -266,6 +285,35 @@ void iscsi_block_session(struct iscsi_cls_session *session) } EXPORT_SYMBOL_GPL(iscsi_block_session); +static void __iscsi_unbind_session(struct work_struct *work) +{ + struct iscsi_cls_session *session = + container_of(work, struct iscsi_cls_session, + unbind_work); + struct Scsi_Host *shost = iscsi_session_to_shost(session); + struct iscsi_host *ihost = shost->shost_data; + + /* Prevent new scans and make sure scanning is not in progress */ + mutex_lock(&ihost->mutex); + if (list_empty(&session->host_list)) { + mutex_unlock(&ihost->mutex); + return; + } + list_del_init(&session->host_list); + mutex_unlock(&ihost->mutex); + + scsi_remove_target(&session->dev); + iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION); +} + +static int iscsi_unbind_session(struct iscsi_cls_session *session) +{ + struct Scsi_Host *shost = iscsi_session_to_shost(session); + struct iscsi_host *ihost = shost->shost_data; + + return queue_work(ihost->unbind_workq, &session->unbind_work); +} + struct iscsi_cls_session * iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport) @@ -282,6 +330,7 @@ iscsi_alloc_session(struct Scsi_Host *shost, INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout); INIT_LIST_HEAD(&session->host_list); INIT_LIST_HEAD(&session->sess_list); + INIT_WORK(&session->unbind_work, __iscsi_unbind_session); /* this is released in the dev's release function */ scsi_host_get(shost); @@ -298,6 +347,7 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) { struct Scsi_Host *shost = iscsi_session_to_shost(session); struct iscsi_host *ihost; + unsigned long flags; int err; ihost = shost->shost_data; @@ -314,9 +364,15 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) } transport_register_device(&session->dev); + spin_lock_irqsave(&sesslock, flags); + list_add(&session->sess_list, &sesslist); + spin_unlock_irqrestore(&sesslock, flags); + mutex_lock(&ihost->mutex); list_add(&session->host_list, &ihost->sessions); mutex_unlock(&ihost->mutex); + + iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION); return 0; release_host: @@ -352,19 +408,58 @@ iscsi_create_session(struct Scsi_Host *shost, } EXPORT_SYMBOL_GPL(iscsi_create_session); +static void iscsi_conn_release(struct device *dev) +{ + struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); + struct device *parent = conn->dev.parent; + + kfree(conn); + put_device(parent); +} + +static int iscsi_is_conn_dev(const struct device *dev) +{ + return dev->release == iscsi_conn_release; +} + +static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data) +{ + if (!iscsi_is_conn_dev(dev)) + return 0; + return iscsi_destroy_conn(iscsi_dev_to_conn(dev)); +} + void iscsi_remove_session(struct iscsi_cls_session *session) { struct Scsi_Host *shost = iscsi_session_to_shost(session); struct iscsi_host *ihost = shost->shost_data; + unsigned long flags; + int err; + + spin_lock_irqsave(&sesslock, flags); + list_del(&session->sess_list); + spin_unlock_irqrestore(&sesslock, flags); + /* + * If we are blocked let commands flow again. The lld or iscsi + * layer should set up the queuecommand to fail commands. + */ + iscsi_unblock_session(session); + iscsi_unbind_session(session); + /* + * If the session dropped while removing devices then we need to make + * sure it is not blocked + */ if (!cancel_delayed_work(&session->recovery_work)) flush_workqueue(iscsi_eh_timer_workq); + flush_workqueue(ihost->unbind_workq); - mutex_lock(&ihost->mutex); - list_del(&session->host_list); - mutex_unlock(&ihost->mutex); - - scsi_remove_target(&session->dev); + /* hw iscsi may not have removed all connections from session */ + err = device_for_each_child(&session->dev, NULL, + iscsi_iter_destroy_conn_fn); + if (err) + dev_printk(KERN_ERR, &session->dev, "iscsi: Could not delete " + "all connections for session. Error %d.\n", err); transport_unregister_device(&session->dev); device_del(&session->dev); @@ -373,9 +468,9 @@ EXPORT_SYMBOL_GPL(iscsi_remove_session); void iscsi_free_session(struct iscsi_cls_session *session) { + iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION); put_device(&session->dev); } - EXPORT_SYMBOL_GPL(iscsi_free_session); /** @@ -393,20 +488,6 @@ int iscsi_destroy_session(struct iscsi_cls_session *session) } EXPORT_SYMBOL_GPL(iscsi_destroy_session); -static void iscsi_conn_release(struct device *dev) -{ - struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev); - struct device *parent = conn->dev.parent; - - kfree(conn); - put_device(parent); -} - -static int iscsi_is_conn_dev(const struct device *dev) -{ - return dev->release == iscsi_conn_release; -} - /** * iscsi_create_conn - create iscsi class connection * @session: iscsi cls session @@ -426,6 +507,7 @@ iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid) { struct iscsi_transport *transport = session->transport; struct iscsi_cls_conn *conn; + unsigned long flags; int err; conn = kzalloc(sizeof(*conn) + transport->conndata_size, GFP_KERNEL); @@ -454,6 +536,11 @@ iscsi_create_conn(struct iscsi_cls_session *session, uint32_t cid) goto release_parent_ref; } transport_register_device(&conn->dev); + + spin_lock_irqsave(&connlock, flags); + list_add(&conn->conn_list, &connlist); + conn->active = 1; + spin_unlock_irqrestore(&connlock, flags); return conn; release_parent_ref: @@ -469,15 +556,21 @@ EXPORT_SYMBOL_GPL(iscsi_create_conn); * iscsi_destroy_conn - destroy iscsi class connection * @conn: iscsi cls session * - * This can be called from an LLD or iscsi_transport. + * This can be called from a LLD or iscsi_transport. */ int iscsi_destroy_conn(struct iscsi_cls_conn *conn) { + unsigned long flags; + + spin_lock_irqsave(&connlock, flags); + conn->active = 0; + list_del(&conn->conn_list); + spin_unlock_irqrestore(&connlock, flags); + transport_unregister_device(&conn->dev); device_unregister(&conn->dev); return 0; } - EXPORT_SYMBOL_GPL(iscsi_destroy_conn); /* @@ -687,132 +780,74 @@ iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh) } /** - * iscsi_if_destroy_session_done - send session destr. completion event - * @conn: last connection for session - * - * This is called by HW iscsi LLDs to notify userpsace that its HW has - * removed a session. + * iscsi_session_event - send session destr. completion event + * @session: iscsi class session + * @event: type of event */ -int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn) +int iscsi_session_event(struct iscsi_cls_session *session, + enum iscsi_uevent_e event) { struct iscsi_internal *priv; - struct iscsi_cls_session *session; struct Scsi_Host *shost; struct iscsi_uevent *ev; struct sk_buff *skb; struct nlmsghdr *nlh; - unsigned long flags; int rc, len = NLMSG_SPACE(sizeof(*ev)); - priv = iscsi_if_transport_lookup(conn->transport); + priv = iscsi_if_transport_lookup(session->transport); if (!priv) return -EINVAL; - - session = iscsi_dev_to_session(conn->dev.parent); shost = iscsi_session_to_shost(session); skb = alloc_skb(len, GFP_KERNEL); if (!skb) { - dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " - "session creation event\n"); + dev_printk(KERN_ERR, &session->dev, "Cannot notify userspace " + "of session event %u\n", event); return -ENOMEM; } nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); ev = NLMSG_DATA(nlh); - ev->transport_handle = iscsi_handle(conn->transport); - ev->type = ISCSI_KEVENT_DESTROY_SESSION; - ev->r.d_session.host_no = shost->host_no; - ev->r.d_session.sid = session->sid; - - /* - * this will occur if the daemon is not up, so we just warn - * the user and when the daemon is restarted it will handle it - */ - rc = iscsi_broadcast_skb(skb, GFP_KERNEL); - if (rc < 0) - dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " - "session destruction event. Check iscsi daemon\n"); - - spin_lock_irqsave(&sesslock, flags); - list_del(&session->sess_list); - spin_unlock_irqrestore(&sesslock, flags); - - spin_lock_irqsave(&connlock, flags); - conn->active = 0; - list_del(&conn->conn_list); - spin_unlock_irqrestore(&connlock, flags); - - return rc; -} -EXPORT_SYMBOL_GPL(iscsi_if_destroy_session_done); - -/** - * iscsi_if_create_session_done - send session creation completion event - * @conn: leading connection for session - * - * This is called by HW iscsi LLDs to notify userpsace that its HW has - * created a session or a existing session is back in the logged in state. - */ -int iscsi_if_create_session_done(struct iscsi_cls_conn *conn) -{ - struct iscsi_internal *priv; - struct iscsi_cls_session *session; - struct Scsi_Host *shost; - struct iscsi_uevent *ev; - struct sk_buff *skb; - struct nlmsghdr *nlh; - unsigned long flags; - int rc, len = NLMSG_SPACE(sizeof(*ev)); + ev->transport_handle = iscsi_handle(session->transport); - priv = iscsi_if_transport_lookup(conn->transport); - if (!priv) + ev->type = event; + switch (event) { + case ISCSI_KEVENT_DESTROY_SESSION: + ev->r.d_session.host_no = shost->host_no; + ev->r.d_session.sid = session->sid; + break; + case ISCSI_KEVENT_CREATE_SESSION: + ev->r.c_session_ret.host_no = shost->host_no; + ev->r.c_session_ret.sid = session->sid; + break; + case ISCSI_KEVENT_UNBIND_SESSION: + ev->r.unbind_session.host_no = shost->host_no; + ev->r.unbind_session.sid = session->sid; + break; + default: + dev_printk(KERN_ERR, &session->dev, "Invalid event %u.\n", + event); + kfree_skb(skb); return -EINVAL; - - session = iscsi_dev_to_session(conn->dev.parent); - shost = iscsi_session_to_shost(session); - - skb = alloc_skb(len, GFP_KERNEL); - if (!skb) { - dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " - "session creation event\n"); - return -ENOMEM; } - nlh = __nlmsg_put(skb, priv->daemon_pid, 0, 0, (len - sizeof(*nlh)), 0); - ev = NLMSG_DATA(nlh); - ev->transport_handle = iscsi_handle(conn->transport); - ev->type = ISCSI_UEVENT_CREATE_SESSION; - ev->r.c_session_ret.host_no = shost->host_no; - ev->r.c_session_ret.sid = session->sid; - /* * this will occur if the daemon is not up, so we just warn * the user and when the daemon is restarted it will handle it */ rc = iscsi_broadcast_skb(skb, GFP_KERNEL); if (rc < 0) - dev_printk(KERN_ERR, &conn->dev, "Cannot notify userspace of " - "session creation event. Check iscsi daemon\n"); - - spin_lock_irqsave(&sesslock, flags); - list_add(&session->sess_list, &sesslist); - spin_unlock_irqrestore(&sesslock, flags); - - spin_lock_irqsave(&connlock, flags); - list_add(&conn->conn_list, &connlist); - conn->active = 1; - spin_unlock_irqrestore(&connlock, flags); + dev_printk(KERN_ERR, &session->dev, "Cannot notify userspace " + "of session event %u. Check iscsi daemon\n", event); return rc; } -EXPORT_SYMBOL_GPL(iscsi_if_create_session_done); +EXPORT_SYMBOL_GPL(iscsi_session_event); static int iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev) { struct iscsi_transport *transport = priv->iscsi_transport; struct iscsi_cls_session *session; - unsigned long flags; uint32_t hostno; session = transport->create_session(transport, &priv->t, @@ -823,10 +858,6 @@ iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_uevent *ev) if (!session) return -ENOMEM; - spin_lock_irqsave(&sesslock, flags); - list_add(&session->sess_list, &sesslist); - spin_unlock_irqrestore(&sesslock, flags); - ev->r.c_session_ret.host_no = hostno; ev->r.c_session_ret.sid = session->sid; return 0; @@ -837,7 +868,6 @@ iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) { struct iscsi_cls_conn *conn; struct iscsi_cls_session *session; - unsigned long flags; session = iscsi_session_lookup(ev->u.c_conn.sid); if (!session) { @@ -856,28 +886,17 @@ iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) ev->r.c_conn_ret.sid = session->sid; ev->r.c_conn_ret.cid = conn->cid; - - spin_lock_irqsave(&connlock, flags); - list_add(&conn->conn_list, &connlist); - conn->active = 1; - spin_unlock_irqrestore(&connlock, flags); - return 0; } static int iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev) { - unsigned long flags; struct iscsi_cls_conn *conn; conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid); if (!conn) return -EINVAL; - spin_lock_irqsave(&connlock, flags); - conn->active = 0; - list_del(&conn->conn_list); - spin_unlock_irqrestore(&connlock, flags); if (transport->destroy_conn) transport->destroy_conn(conn); @@ -1004,7 +1023,6 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) struct iscsi_internal *priv; struct iscsi_cls_session *session; struct iscsi_cls_conn *conn; - unsigned long flags; priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle)); if (!priv) @@ -1022,13 +1040,16 @@ iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) break; case ISCSI_UEVENT_DESTROY_SESSION: session = iscsi_session_lookup(ev->u.d_session.sid); - if (session) { - spin_lock_irqsave(&sesslock, flags); - list_del(&session->sess_list); - spin_unlock_irqrestore(&sesslock, flags); - + if (session) transport->destroy_session(session); - } else + else + err = -EINVAL; + break; + case ISCSI_UEVENT_UNBIND_SESSION: + session = iscsi_session_lookup(ev->u.d_session.sid); + if (session) + iscsi_unbind_session(session); + else err = -EINVAL; break; case ISCSI_UEVENT_CREATE_CONN: diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h index bff0b1f7857..8a4426df6c3 100644 --- a/include/scsi/iscsi_if.h +++ b/include/scsi/iscsi_if.h @@ -49,12 +49,15 @@ enum iscsi_uevent_e { ISCSI_UEVENT_TGT_DSCVR = UEVENT_BASE + 15, ISCSI_UEVENT_SET_HOST_PARAM = UEVENT_BASE + 16, + ISCSI_UEVENT_UNBIND_SESSION = UEVENT_BASE + 17, /* up events */ ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1, ISCSI_KEVENT_CONN_ERROR = KEVENT_BASE + 2, ISCSI_KEVENT_IF_ERROR = KEVENT_BASE + 3, ISCSI_KEVENT_DESTROY_SESSION = KEVENT_BASE + 4, + ISCSI_KEVENT_UNBIND_SESSION = KEVENT_BASE + 5, + ISCSI_KEVENT_CREATE_SESSION = KEVENT_BASE + 6, }; enum iscsi_tgt_dscvr { @@ -156,6 +159,10 @@ struct iscsi_uevent { uint32_t sid; uint32_t cid; } c_conn_ret; + struct msg_unbind_session { + uint32_t sid; + uint32_t host_no; + } unbind_session; struct msg_recv_req { uint32_t sid; uint32_t cid; diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h index 6947082eee6..318a909e7ae 100644 --- a/include/scsi/iscsi_proto.h +++ b/include/scsi/iscsi_proto.h @@ -21,6 +21,8 @@ #ifndef ISCSI_PROTO_H #define ISCSI_PROTO_H +#include <linux/types.h> + #define ISCSI_DRAFT20_VERSION 0x00 /* default iSCSI listen port for incoming connections */ diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index b8d97bd20f6..093b4036f8d 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -186,6 +186,7 @@ struct iscsi_cls_session { /* recovery fields */ int recovery_tmo; struct delayed_work recovery_work; + struct work_struct unbind_work; int target_id; @@ -206,6 +207,8 @@ struct iscsi_cls_session { struct iscsi_host { struct list_head sessions; struct mutex mutex; + struct workqueue_struct *unbind_workq; + char unbind_workq_name[KOBJ_NAME_LEN]; }; /* @@ -215,8 +218,8 @@ extern struct iscsi_cls_session *iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport); extern int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id); -extern int iscsi_if_create_session_done(struct iscsi_cls_conn *conn); -extern int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn); +extern int iscsi_session_event(struct iscsi_cls_session *session, + enum iscsi_uevent_e event); extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *t, unsigned int target_id); |