diff options
author | Nicholas Bellinger <nab@linux-iscsi.org> | 2017-09-22 16:48:28 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 08:37:22 +0000 |
commit | 4e426ed57cd24b8d6621a4cf60d715d7a7da9a76 (patch) | |
tree | 2a91807732c21b06aeac1a31e9ca697428700169 /drivers/target/target_core_transport.c | |
parent | 63bfc4c90a878df5fcb4a80a06390393dbee1519 (diff) |
target: Fix QUEUE_FULL + SCSI task attribute handling
commit 1c79df1f349fb6050016cea4ef1dfbc3853a5685 upstream.
This patch fixes a bug during QUEUE_FULL where transport_complete_qf()
calls transport_complete_task_attr() after it's already been invoked
by target_complete_ok_work() or transport_generic_request_failure()
during initial completion, preceeding QUEUE_FULL.
This will result in se_device->simple_cmds, se_device->dev_cur_ordered_id
and/or se_device->dev_ordered_sync being updated multiple times for
a single se_cmd.
To address this bug, clear SCF_TASK_ATTR_SET after the first call
to transport_complete_task_attr(), and avoid updating SCSI task
attribute related counters for any subsequent calls.
Also, when a se_cmd is deferred due to ordered tags and executed
via target_restart_delayed_cmds(), set CMD_T_SENT before execution
matching what target_execute_cmd() does.
Cc: Michael Cyr <mikecyr@linux.vnet.ibm.com>
Cc: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/target/target_core_transport.c')
-rw-r--r-- | drivers/target/target_core_transport.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index a42054edd427..37abf881ca75 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1970,6 +1970,8 @@ static void target_restart_delayed_cmds(struct se_device *dev) list_del(&cmd->se_delayed_node); spin_unlock(&dev->delayed_cmd_lock); + cmd->transport_state |= CMD_T_SENT; + __target_execute_cmd(cmd, true); if (cmd->sam_task_attr == TCM_ORDERED_TAG) @@ -2007,6 +2009,8 @@ static void transport_complete_task_attr(struct se_cmd *cmd) pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED\n", dev->dev_cur_ordered_id); } + cmd->se_cmd_flags &= ~SCF_TASK_ATTR_SET; + restart: target_restart_delayed_cmds(dev); } |