4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
commit ebde1ca5a908b10312db4ecd7553e3ba039319ab upstream.
This patch fixes a bug in TMR task aborted status (TAS)
handling when multiple sessions are connected to the
same target WWPN endpoint and se_node_acl descriptor,
resulting in TASK_ABORTED status to not be generated
for aborted se_cmds on the remote port.
This is due to core_tmr_handle_tas_abort() incorrectly
comparing se_node_acl instead of se_session, for which
the multi-session case is expected to be sharing the
same se_node_acl.
Instead, go ahead and update core_tmr_handle_tas_abort()
to compare tmr_sess + cmd->se_sess in order to determine
if the LUN_RESET was received on a different I_T nexus,
and TASK_ABORTED status response needs to be generated.
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Cc: Quinn Tran <quinn.tran@xxxxxxxxxx>
Cc: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Cc: Sagi Grimberg <sagig@xxxxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Andy Grover <agrover@xxxxxxxxxx>
Cc: Mike Christie <mchristi@xxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/target/target_core_tmr.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
--- a/drivers/target/target_core_tmr.c
+++ b/drivers/target/target_core_tmr.c
@@ -76,7 +76,7 @@ void core_tmr_release_req(struct se_tmr_
}
static void core_tmr_handle_tas_abort(
- struct se_node_acl *tmr_nacl,
+ struct se_session *tmr_sess,
struct se_cmd *cmd,
int tas)
{
@@ -84,7 +84,7 @@ static void core_tmr_handle_tas_abort(
/*
* TASK ABORTED status (TAS) bit support
*/
- if ((tmr_nacl && (tmr_nacl != cmd->se_sess->se_node_acl)) && tas) {
+ if (tmr_sess && tmr_sess != cmd->se_sess && tas) {
remove = false;
transport_send_task_abort(cmd);
}
@@ -273,7 +273,7 @@ static void core_tmr_drain_tmr_list(
static void core_tmr_drain_state_list(
struct se_device *dev,
struct se_cmd *prout_cmd,
- struct se_node_acl *tmr_nacl,
+ struct se_session *tmr_sess,
int tas,
struct list_head *preempt_and_abort_list)
{
@@ -364,7 +364,7 @@ static void core_tmr_drain_state_list(
cancel_work_sync(&cmd->work);
transport_wait_for_tasks(cmd);
- core_tmr_handle_tas_abort(tmr_nacl, cmd, tas);
+ core_tmr_handle_tas_abort(tmr_sess, cmd, tas);
target_put_sess_cmd(cmd);
}
}
@@ -377,6 +377,7 @@ int core_tmr_lun_reset(
{
struct se_node_acl *tmr_nacl = NULL;
struct se_portal_group *tmr_tpg = NULL;
+ struct se_session *tmr_sess = NULL;
int tas;
/*
* TASK_ABORTED status bit, this is configurable via ConfigFS
@@ -395,8 +396,9 @@ int core_tmr_lun_reset(
* or struct se_device passthrough..
*/
if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) {
- tmr_nacl = tmr->task_cmd->se_sess->se_node_acl;
- tmr_tpg = tmr->task_cmd->se_sess->se_tpg;
+ tmr_sess = tmr->task_cmd->se_sess;
+ tmr_nacl = tmr_sess->se_node_acl;
+ tmr_tpg = tmr_sess->se_tpg;
if (tmr_nacl && tmr_tpg) {
pr_debug("LUN_RESET: TMR caller fabric: %s"
" initiator port %s\n",
@@ -409,7 +411,7 @@ int core_tmr_lun_reset(
dev->transport->name, tas);
core_tmr_drain_tmr_list(dev, tmr, preempt_and_abort_list);
- core_tmr_drain_state_list(dev, prout_cmd, tmr_nacl, tas,
+ core_tmr_drain_state_list(dev, prout_cmd, tmr_sess, tas,
preempt_and_abort_list);
/*
--
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