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authorMike Christie <michael.christie@oracle.com>2020-11-01 12:59:32 -0600
committerMartin K. Petersen <martin.petersen@oracle.com>2020-11-04 22:39:37 -0500
commit6f55b06f9b0722607cbac2140875d790395435f2 (patch)
tree2cfda8dc67da1478eae6678750cf7a65b3895581 /include/target
parent605e74025f953b995a3a241ead43bde71c1c99b5 (diff)
scsi: target: Drop sess_cmd_lock from I/O path
Drop the sess_cmd_lock by: - Removing the sess_cmd_list use from LIO core, because it's been moved to qla2xxx. - Removing sess_tearing_down check in the I/O path. Instead of using that bit and the sess_cmd_lock, we rely on the cmd_count percpu ref. To do this we switch to percpu_ref_kill_and_confirm/percpu_ref_tryget_live. Link: https://lore.kernel.org/r/1604257174-4524-7-git-send-email-michael.christie@oracle.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/target')
-rw-r--r--include/target/target_core_base.h6
-rw-r--r--include/target/target_core_fabric.h2
2 files changed, 4 insertions, 4 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 7d632593c398..c858dc060381 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -608,7 +608,7 @@ static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item)
}
struct se_session {
- unsigned sess_tearing_down:1;
+ atomic_t stopped;
u64 sess_bin_isid;
enum target_prot_op sup_prot_ops;
enum target_prot_type sess_prot_type;
@@ -618,9 +618,9 @@ struct se_session {
struct percpu_ref cmd_count;
struct list_head sess_list;
struct list_head sess_acl_list;
- struct list_head sess_cmd_list;
spinlock_t sess_cmd_lock;
- wait_queue_head_t cmd_list_wq;
+ wait_queue_head_t cmd_count_wq;
+ struct completion stop_done;
void *sess_cmd_map;
struct sbitmap_queue sess_tag_pool;
};
diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h
index 6adf4d71acf6..d60a3eb7517a 100644
--- a/include/target/target_core_fabric.h
+++ b/include/target/target_core_fabric.h
@@ -178,7 +178,7 @@ int transport_send_check_condition_and_sense(struct se_cmd *,
int target_send_busy(struct se_cmd *cmd);
int target_get_sess_cmd(struct se_cmd *, bool);
int target_put_sess_cmd(struct se_cmd *);
-void target_sess_cmd_list_set_waiting(struct se_session *);
+void target_stop_session(struct se_session *se_sess);
void target_wait_for_sess_cmds(struct se_session *);
void target_show_cmd(const char *pfx, struct se_cmd *cmd);