diff options
| author |   Nicholas Bellinger <nab@linux-iscsi.org> | 2013-06-07 17:38:58 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-09-09 14:29:16 -0700 |
| commit | c0add7fd05ff99c3a516c78eb6b1e6460a3efdae (patch) | |
| tree | 2aa45b7fe481134865e179caf631501bad811959 /include/target | |
| parent | idr: Percpu ida (diff) | |
| download | linux-dev-c0add7fd05ff99c3a516c78eb6b1e6460a3efdae.tar.xz linux-dev-c0add7fd05ff99c3a516c78eb6b1e6460a3efdae.zip | |
target: Add transport_init_session_tags using per-cpu ida
This patch adds lib/idr.c based transport_init_session_tags() logic
that allows fabric drivers to setup a per-cpu se_sess->sess_tag_pool
and associated se_sess->sess_cmd_map for basic tagged pre-allocation
of fabric descriptor sized memory.
v5 changes:
- Convert to percpu_ida.h include
v4 changes:
- Add transport_alloc_session_tags() for fabrics that need early
transport_init_session()
v3 changes:
- Update to percpu-ida usage
Cc: Kent Overstreet <kmo@daterainc.com>
Cc: Asias He <asias@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include/target')
| -rw-r--r-- | include/target/target_core_base.h | 5 | ||||
| -rw-r--r-- | include/target/target_core_fabric.h | 3 |
2 files changed, 8 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index e34fc904f2e1..bd55acd43005 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -5,6 +5,7 @@ #include <linux/configfs.h> #include <linux/dma-mapping.h> #include <linux/blkdev.h> +#include <linux/percpu_ida.h> #include <scsi/scsi_cmnd.h> #include <net/sock.h> #include <net/tcp.h> @@ -415,6 +416,8 @@ struct se_cmd { enum dma_data_direction data_direction; /* For SAM Task Attribute */ int sam_task_attr; + /* Used for se_sess->sess_tag_pool */ + unsigned int map_tag; /* Transport protocol dependent state, see transport_state_table */ enum transport_state_table t_state; unsigned cmd_wait_set:1; @@ -536,6 +539,8 @@ struct se_session { struct list_head sess_wait_list; spinlock_t sess_cmd_lock; struct kref sess_kref; + void *sess_cmd_map; + struct percpu_ida sess_tag_pool; }; struct se_device; diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h index 7a16178424f9..d559c36692af 100644 --- a/include/target/target_core_fabric.h +++ b/include/target/target_core_fabric.h @@ -84,6 +84,9 @@ struct target_core_fabric_ops { }; struct se_session *transport_init_session(void); +int transport_alloc_session_tags(struct se_session *, unsigned int, + unsigned int); +struct se_session *transport_init_session_tags(unsigned int, unsigned int); void __transport_register_session(struct se_portal_group *, struct se_node_acl *, struct se_session *, void *); void transport_register_session(struct se_portal_group *, |