From dab12f5dad761326128afad7efd0cc3453ac42d0 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Sun, 30 Oct 2016 17:30:08 -0700 Subject: [PATCH] iscsi-target: Propigate queue_data_in + queue_status errors This patch changes iscsi-target to propagate iscsit_transport ->iscsit_queue_data_in() and ->iscsit_queue_status() callback errors, back up into target-core. This allows target-core to retry failed iscsit_transport callbacks using internal queue-full logic. Reported-by: Potnuri Bharat Teja Reviewed-by: Potnuri Bharat Teja Tested-by: Potnuri Bharat Teja Cc: Potnuri Bharat Teja Reported-by: Steve Wise Cc: Steve Wise Cc: Sagi Grimberg Signed-off-by: Nicholas Bellinger --- drivers/target/iscsi/iscsi_target.c | 3 +-- drivers/target/iscsi/iscsi_target_configfs.c | 13 +++++-------- drivers/target/iscsi/iscsi_target_util.c | 5 +++-- drivers/target/iscsi/iscsi_target_util.h | 2 +- 4 files changed, 10 insertions(+), 13 deletions(-) diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index a91802432f2f4..e3f9ed3690b7a 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -485,8 +485,7 @@ static void iscsit_get_rx_pdu(struct iscsi_conn *); int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd) { - iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); - return 0; + return iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); } EXPORT_SYMBOL(iscsit_queue_rsp); diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c index bf40f03755ddc..344e8448869c1 100644 --- a/drivers/target/iscsi/iscsi_target_configfs.c +++ b/drivers/target/iscsi/iscsi_target_configfs.c @@ -1398,11 +1398,10 @@ static u32 lio_sess_get_initiator_sid( static int lio_queue_data_in(struct se_cmd *se_cmd) { struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd); + struct iscsi_conn *conn = cmd->conn; cmd->i_state = ISTATE_SEND_DATAIN; - cmd->conn->conn_transport->iscsit_queue_data_in(cmd->conn, cmd); - - return 0; + return conn->conn_transport->iscsit_queue_data_in(conn, cmd); } static int lio_write_pending(struct se_cmd *se_cmd) @@ -1431,16 +1430,14 @@ static int lio_write_pending_status(struct se_cmd *se_cmd) static int lio_queue_status(struct se_cmd *se_cmd) { struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd); + struct iscsi_conn *conn = cmd->conn; cmd->i_state = ISTATE_SEND_STATUS; if (cmd->se_cmd.scsi_status || cmd->sense_reason) { - iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); - return 0; + return iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); } - cmd->conn->conn_transport->iscsit_queue_status(cmd->conn, cmd); - - return 0; + return conn->conn_transport->iscsit_queue_status(conn, cmd); } static void lio_queue_tm_rsp(struct se_cmd *se_cmd) diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c index b4640338f8d83..7d3e2fcc26a0d 100644 --- a/drivers/target/iscsi/iscsi_target_util.c +++ b/drivers/target/iscsi/iscsi_target_util.c @@ -567,7 +567,7 @@ static void iscsit_remove_cmd_from_immediate_queue( } } -void iscsit_add_cmd_to_response_queue( +int iscsit_add_cmd_to_response_queue( struct iscsi_cmd *cmd, struct iscsi_conn *conn, u8 state) @@ -578,7 +578,7 @@ void iscsit_add_cmd_to_response_queue( if (!qr) { pr_err("Unable to allocate memory for" " struct iscsi_queue_req\n"); - return; + return -ENOMEM; } INIT_LIST_HEAD(&qr->qr_list); qr->cmd = cmd; @@ -590,6 +590,7 @@ void iscsit_add_cmd_to_response_queue( spin_unlock_bh(&conn->response_queue_lock); wake_up(&conn->queues_wq); + return 0; } struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) diff --git a/drivers/target/iscsi/iscsi_target_util.h b/drivers/target/iscsi/iscsi_target_util.h index 8ff08856516ab..9e4197af8708e 100644 --- a/drivers/target/iscsi/iscsi_target_util.h +++ b/drivers/target/iscsi/iscsi_target_util.h @@ -31,7 +31,7 @@ extern int iscsit_find_cmd_for_recovery(struct iscsi_session *, struct iscsi_cmd struct iscsi_conn_recovery **, itt_t); extern void iscsit_add_cmd_to_immediate_queue(struct iscsi_cmd *, struct iscsi_conn *, u8); extern struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *); -extern void iscsit_add_cmd_to_response_queue(struct iscsi_cmd *, struct iscsi_conn *, u8); +extern int iscsit_add_cmd_to_response_queue(struct iscsi_cmd *, struct iscsi_conn *, u8); extern struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *); extern void iscsit_remove_cmd_from_tx_queues(struct iscsi_cmd *, struct iscsi_conn *); extern bool iscsit_conn_all_queues_empty(struct iscsi_conn *); -- 2.39.5