diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-02-27 06:22:10 (GMT) |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-03-10 22:41:53 (GMT) |
| commit | 41ac82b668177876d5965d5f60956fb0fbcdb514 (patch) | |
| tree | 229c299330fa9c3cb4cb5a1903e0559e3e7a5d5b | |
| parent | 140854cb72525246745b67300d35101ad2875a39 (diff) | |
| download | linux-41ac82b668177876d5965d5f60956fb0fbcdb514.tar.xz | |
target: Add se_sess->sess_kref + get/put helpers
This patch adds basic se_session->sess_kref and get/put helpers for fabric
session reference counting. It sets the initial kref in transport_init_session()
and adds a target_release_session() callback to invoke TFO->close_session()
for final session shutdown.
Cc: Roland Dreier <roland@purestorage.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Joern Engel <joern@logfs.org>
Cc: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| -rw-r--r-- | drivers/target/target_core_transport.c | 22 | ||||
| -rw-r--r-- | include/target/target_core_base.h | 1 | ||||
| -rw-r--r-- | include/target/target_core_fabric.h | 2 |
3 files changed, 25 insertions, 0 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index d931edf..7badc87 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -246,6 +246,7 @@ struct se_session *transport_init_session(void) INIT_LIST_HEAD(&se_sess->sess_cmd_list); INIT_LIST_HEAD(&se_sess->sess_wait_list); spin_lock_init(&se_sess->sess_cmd_lock); + kref_init(&se_sess->sess_kref); return se_sess; } @@ -313,6 +314,27 @@ void transport_register_session( } EXPORT_SYMBOL(transport_register_session); +static void target_release_session(struct kref *kref) +{ + struct se_session *se_sess = container_of(kref, + struct se_session, sess_kref); + struct se_portal_group *se_tpg = se_sess->se_tpg; + + se_tpg->se_tpg_tfo->close_session(se_sess); +} + +void target_get_session(struct se_session *se_sess) +{ + kref_get(&se_sess->sess_kref); +} +EXPORT_SYMBOL(target_get_session); + +int target_put_session(struct se_session *se_sess) +{ + return kref_put(&se_sess->sess_kref, target_release_session); +} +EXPORT_SYMBOL(target_put_session); + void transport_deregister_session_configfs(struct se_session *se_sess) { struct se_node_acl *se_nacl; diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index 1641dea..d630794 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -654,6 +654,7 @@ struct se_session { struct list_head sess_cmd_list; struct list_head sess_wait_list; spinlock_t sess_cmd_lock; + struct kref sess_kref; }; struct se_device; diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h index e5d8c47..7e76aa1 100644 --- a/include/target/target_core_fabric.h +++ b/include/target/target_core_fabric.h @@ -105,6 +105,8 @@ void __transport_register_session(struct se_portal_group *, struct se_node_acl *, struct se_session *, void *); void transport_register_session(struct se_portal_group *, struct se_node_acl *, struct se_session *, void *); +void target_get_session(struct se_session *); +int target_put_session(struct se_session *); void transport_free_session(struct se_session *); void transport_deregister_session_configfs(struct se_session *); void transport_deregister_session(struct se_session *); |