diff options
| -rw-r--r-- | drivers/scsi/scsi_transport_iscsi.c | 97 | ||||
| -rw-r--r-- | include/scsi/scsi_transport_iscsi.h | 8 |
2 files changed, 76 insertions, 29 deletions
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index c0ec502835e..f39da0cf5f1 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -287,20 +287,11 @@ void iscsi_block_session(struct iscsi_cls_session *session) } EXPORT_SYMBOL_GPL(iscsi_block_session); -/** - * iscsi_create_session - create iscsi class session - * @shost: scsi host - * @transport: iscsi transport - * - * This can be called from a LLD or iscsi_transport. - **/ struct iscsi_cls_session * -iscsi_create_session(struct Scsi_Host *shost, - struct iscsi_transport *transport) +iscsi_alloc_session(struct Scsi_Host *shost, + struct iscsi_transport *transport) { - struct iscsi_host *ihost; struct iscsi_cls_session *session; - int err; session = kzalloc(sizeof(*session) + transport->sessiondata_size, GFP_KERNEL); @@ -313,8 +304,20 @@ iscsi_create_session(struct Scsi_Host *shost, INIT_LIST_HEAD(&session->host_list); INIT_LIST_HEAD(&session->sess_list); + session->dev.parent = &shost->shost_gendev; + session->dev.release = iscsi_session_release; + device_initialize(&session->dev); if (transport->sessiondata_size) session->dd_data = &session[1]; + return session; +} +EXPORT_SYMBOL_GPL(iscsi_alloc_session); + +int iscsi_add_session(struct iscsi_cls_session *session) +{ + struct Scsi_Host *shost = iscsi_session_to_shost(session); + struct iscsi_host *ihost; + int err; /* this is released in the dev's release function */ scsi_host_get(shost); @@ -325,37 +328,51 @@ iscsi_create_session(struct Scsi_Host *shost, snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u", session->sid); - session->dev.parent = &shost->shost_gendev; - session->dev.release = iscsi_session_release; - err = device_register(&session->dev); + err = device_add(&session->dev); if (err) { dev_printk(KERN_ERR, &session->dev, "iscsi: could not " "register session's dev\n"); - goto free_session; + goto release_host; } transport_register_device(&session->dev); mutex_lock(&ihost->mutex); list_add(&session->host_list, &ihost->sessions); mutex_unlock(&ihost->mutex); + return 0; - return session; - -free_session: - kfree(session); - return NULL; +release_host: + scsi_host_put(shost); + return err; } - -EXPORT_SYMBOL_GPL(iscsi_create_session); +EXPORT_SYMBOL_GPL(iscsi_add_session); /** - * iscsi_destroy_session - destroy iscsi session - * @session: iscsi_session + * iscsi_create_session - create iscsi class session + * @shost: scsi host + * @transport: iscsi transport * - * Can be called by a LLD or iscsi_transport. There must not be - * any running connections. + * This can be called from a LLD or iscsi_transport. **/ -int iscsi_destroy_session(struct iscsi_cls_session *session) +struct iscsi_cls_session * +iscsi_create_session(struct Scsi_Host *shost, + struct iscsi_transport *transport) +{ + struct iscsi_cls_session *session; + + session = iscsi_alloc_session(shost, transport); + if (!session) + return NULL; + + if (iscsi_add_session(session)) { + iscsi_free_session(session); + return NULL; + } + return session; +} +EXPORT_SYMBOL_GPL(iscsi_create_session); + +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; @@ -367,11 +384,33 @@ int iscsi_destroy_session(struct iscsi_cls_session *session) list_del(&session->host_list); mutex_unlock(&ihost->mutex); + scsi_remove_target(&session->dev); + transport_unregister_device(&session->dev); - device_unregister(&session->dev); - return 0; + device_del(&session->dev); } +EXPORT_SYMBOL_GPL(iscsi_remove_session); +void iscsi_free_session(struct iscsi_cls_session *session) +{ + put_device(&session->dev); +} + +EXPORT_SYMBOL_GPL(iscsi_free_session); + +/** + * iscsi_destroy_session - destroy iscsi session + * @session: iscsi_session + * + * Can be called by a LLD or iscsi_transport. There must not be + * any running connections. + **/ +int iscsi_destroy_session(struct iscsi_cls_session *session) +{ + iscsi_remove_session(session); + iscsi_free_session(session); + return 0; +} EXPORT_SYMBOL_GPL(iscsi_destroy_session); static void iscsi_conn_release(struct device *dev) diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index 2e3cb37af04..53493d59135 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -199,6 +199,9 @@ struct iscsi_cls_session { #define iscsi_session_to_shost(_session) \ dev_to_shost(_session->dev.parent) +#define starget_to_session(_stgt) \ + iscsi_dev_to_session(_stgt->dev.parent) + struct iscsi_host { int next_target_id; struct list_head sessions; @@ -208,8 +211,13 @@ struct iscsi_host { /* * session and connection functions that can be used by HW iSCSI LLDs */ +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); extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *t); +extern void iscsi_remove_session(struct iscsi_cls_session *session); +extern void iscsi_free_session(struct iscsi_cls_session *session); extern int iscsi_destroy_session(struct iscsi_cls_session *session); extern struct iscsi_cls_conn *iscsi_create_conn(struct iscsi_cls_session *sess, uint32_t cid); |