This is a note to let you know that I've just added the patch titled
target: Fix TAS handling for multi-session se_node_acls
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
target-fix-tas-handling-for-multi-session-se_node_acls.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ebde1ca5a908b10312db4ecd7553e3ba039319ab Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Date: Sat, 16 Jan 2016 12:49:49 -0800
Subject: target: Fix TAS handling for multi-session se_node_acls
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>
Cc: stable@xxxxxxxxxxxxxxx # 3.10+
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/target/target_core_tmr.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
--- a/drivers/target/target_core_tmr.c
+++ b/drivers/target/target_core_tmr.c
@@ -83,7 +83,7 @@ void core_tmr_release_req(
}
static void core_tmr_handle_tas_abort(
- struct se_node_acl *tmr_nacl,
+ struct se_session *tmr_sess,
struct se_cmd *cmd,
int tas)
{
@@ -91,8 +91,7 @@ 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);
}
@@ -278,7 +277,7 @@ 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)
{
@@ -369,7 +368,7 @@ 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->se_sess, cmd);
}
}
@@ -382,6 +381,7 @@ 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
@@ -400,8 +400,9 @@ 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",
@@ -414,7 +415,7 @@ 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);
/*
Patches currently in stable-queue which might be from nab@xxxxxxxxxxxxxxx are
queue-3.14/target-fix-task-aborted-status-tas-handling.patch
queue-3.14/target-add-tfo-abort_task-for-aborted-task-resources-release.patch
queue-3.14/target-fix-remote-port-tmr-abort-se_cmd-fabric-stop.patch
queue-3.14/target-fix-lun_reset-active-tmr-descriptor-handling.patch
queue-3.14/target-fix-write_same-discard-conversion-to-linux-512b-sectors.patch
queue-3.14/target-fix-race-with-scf_send_delayed_tas-handling.patch
queue-3.14/target-fix-lun_reset-active-i-o-handling-for-ack_kref.patch
queue-3.14/target-fix-tas-handling-for-multi-session-se_node_acls.patch
--
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