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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2016-03-06 01:40:00 +0000 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-03-05 22:13:44 -0500 |
| commit | 2c1ae9df17bb9b0d8efd520736f1f7effa579241 (patch) | |
| tree | 895819e0ed2796783681ff651c758539565f4e5d /include/target | |
| parent | 84f48a25621f5a3b9a74b2bb7f160a07ee1ac780 (diff) | |
| download | linux-rt-2c1ae9df17bb9b0d8efd520736f1f7effa579241.tar.gz | |
target: Fix remote-port TMR ABORT + se_cmd fabric stop
commit 0f4a943168f31d29a1701908931acaba518b131a upstream.
To address the bug where fabric driver level shutdown
of se_cmd occurs at the same time when TMR CMD_T_ABORTED
is happening resulting in a -1 ->cmd_kref, this patch
adds a CMD_T_FABRIC_STOP bit that is used to determine
when TMR + driver I_T nexus shutdown is happening
concurrently.
It changes target_sess_cmd_list_set_waiting() to obtain
se_cmd->cmd_kref + set CMD_T_FABRIC_STOP, and drop local
reference in target_wait_for_sess_cmds() and invoke extra
target_put_sess_cmd() during Task Aborted Status (TAS)
when necessary.
Also, it adds a new target_wait_free_cmd() wrapper around
transport_wait_for_tasks() for the special case within
transport_generic_free_cmd() to set CMD_T_FABRIC_STOP,
and is now aware of CMD_T_ABORTED + CMD_T_TAS status
bits to know when an extra transport_put_cmd() during
TAS is required.
Note transport_generic_free_cmd() is expected to block on
cmd->cmd_wait_comp in order to follow what iscsi-target
expects during iscsi_conn context se_cmd shutdown.
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Himanshu Madhani <himanshu.madhani@qlogic.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Andy Grover <agrover@redhat.com>
Cc: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'include/target')
| -rw-r--r-- | include/target/target_core_base.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index 8a03ec2b86c4..ad9ce86428a6 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -535,6 +535,8 @@ struct se_cmd { #define CMD_T_DEV_ACTIVE (1 << 7) #define CMD_T_REQUEST_STOP (1 << 8) #define CMD_T_BUSY (1 << 9) +#define CMD_T_TAS (1 << 10) +#define CMD_T_FABRIC_STOP (1 << 11) spinlock_t t_state_lock; struct completion t_transport_stop_comp; |