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authorBart Van Assche <bvanassche@acm.org>2019-01-25 21:34:44 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2019-02-05 05:25:13 +0300
commit3f0661a492a199b7de2fb63eceba8c79039bff83 (patch)
tree72f17cb0976dd048ec122c786b65e0682cd2ffc1
parentf80d2f0846b7b9ceb1f2a5951229ee4391edaebd (diff)
downloadlinux-3f0661a492a199b7de2fb63eceba8c79039bff83.tar.xz
scsi: target/core: Remove several state tests from the TMF code
Whether or not a session is being torn down does not affect whether or not SCSI commands are in the task set. Hence remove the "tearing down" checks from the TMF code. The TRANSPORT_ISTATE_PROCESSING check is left out because it is now safe to wait for a command that is in that state. The CMD_T_PRE_EXECUTE is left out because abort processing is postponed until after commands have left the pre-execute state since the patch that makes TMF processing synchronous. See also commit 1c21a48055a6 ("target: Avoid early CMD_T_PRE_EXECUTE failures during ABORT_TASK"). Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Mike Christie <mchristi@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-rw-r--r--drivers/target/target_core_tmr.c25
-rw-r--r--drivers/target/target_core_transport.c2
-rw-r--r--include/target/target_core_base.h1
3 files changed, 0 insertions, 28 deletions
diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c
index ad0061e09d4c..df1ca827de68 100644
--- a/drivers/target/target_core_tmr.c
+++ b/drivers/target/target_core_tmr.c
@@ -114,21 +114,6 @@ static bool __target_check_io_state(struct se_cmd *se_cmd,
spin_unlock(&se_cmd->t_state_lock);
return false;
}
- if (se_cmd->transport_state & CMD_T_PRE_EXECUTE) {
- if (se_cmd->scsi_status) {
- pr_debug("Attempted to abort io tag: %llu early failure"
- " status: 0x%02x\n", se_cmd->tag,
- se_cmd->scsi_status);
- spin_unlock(&se_cmd->t_state_lock);
- return false;
- }
- }
- if (sess->sess_tearing_down) {
- pr_debug("Attempted to abort io tag: %llu already shutdown,"
- " skipping\n", se_cmd->tag);
- spin_unlock(&se_cmd->t_state_lock);
- return false;
- }
se_cmd->transport_state |= CMD_T_ABORTED;
if ((tmr_sess != se_cmd->se_sess) && tas)
@@ -239,16 +224,6 @@ static void core_tmr_drain_tmr_list(
spin_unlock(&sess->sess_cmd_lock);
continue;
}
- if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) {
- spin_unlock(&cmd->t_state_lock);
- spin_unlock(&sess->sess_cmd_lock);
- continue;
- }
- if (sess->sess_tearing_down) {
- spin_unlock(&cmd->t_state_lock);
- spin_unlock(&sess->sess_cmd_lock);
- continue;
- }
cmd->transport_state |= CMD_T_ABORTED;
spin_unlock(&cmd->t_state_lock);
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index ef9e75b359d4..b25d27e8ca20 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2056,7 +2056,6 @@ void target_execute_cmd(struct se_cmd *cmd)
spin_lock_irq(&cmd->t_state_lock);
cmd->t_state = TRANSPORT_PROCESSING;
- cmd->transport_state &= ~CMD_T_PRE_EXECUTE;
cmd->transport_state |= CMD_T_ACTIVE | CMD_T_SENT;
spin_unlock_irq(&cmd->t_state_lock);
@@ -2765,7 +2764,6 @@ int target_get_sess_cmd(struct se_cmd *se_cmd, bool ack_kref)
ret = -ESHUTDOWN;
goto out;
}
- se_cmd->transport_state |= CMD_T_PRE_EXECUTE;
list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list);
percpu_ref_get(&se_sess->cmd_count);
out:
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 69b7b955902c..19a5bf4214fc 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -502,7 +502,6 @@ struct se_cmd {
#define CMD_T_STOP (1 << 5)
#define CMD_T_TAS (1 << 10)
#define CMD_T_FABRIC_STOP (1 << 11)
-#define CMD_T_PRE_EXECUTE (1 << 12)
spinlock_t t_state_lock;
struct kref cmd_kref;
struct completion t_transport_stop_comp;