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target: Add TFO->abort_task for aborted task resources release

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Now that TASK_ABORTED status is not generated for all cases by
TMR ABORT_TASK + LUN_RESET, a new TFO->abort_task() caller is
necessary in order to give fabric drivers a chance to unmap
hardware / software resources before the se_cmd descriptor is
released via the normal TFO->release_cmd() codepath.

This patch adds TFO->aborted_task() in core_tmr_abort_task()
in place of the original transport_send_task_abort(), and
also updates all fabric drivers to implement this caller.

The fabric drivers that include changes to perform cleanup
via ->aborted_task() are:

  - iscsi-target
  - iser-target
  - srpt
  - tcm_qla2xxx

The fabric drivers that currently set ->aborted_task() to
NOPs are:

  - loopback
  - tcm_fc
  - usb-gadget
  - sbp-target
  - vhost-scsi

For the latter five, there appears to be no additional cleanup
required before invoking TFO->release_cmd() to release the
se_cmd descriptor.

v2 changes:
  - Move ->aborted_task() call into transport_cmd_finish_abort (Alex)

Cc: Alex Leung <[email protected]>
Cc: Mark Rustad <[email protected]>
Cc: Roland Dreier <[email protected]>
Cc: Vu Pham <[email protected]>
Cc: Chris Boot <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Michael S. Tsirkin <[email protected]>
Cc: Giridhar Malavali <[email protected]>
Cc: Saurav Kashyap <[email protected]>
Cc: Quinn Tran <[email protected]>
Cc: Sagi Grimberg <[email protected]>
Cc: Or Gerlitz <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>
This commit is contained in:
Nicholas Bellinger 2014-03-22 14:55:56 -07:00
commit 131e6abc67
18 changed files with 111 additions and 2 deletions
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6
drivers/vhost/scsi.c
View file

@ -539,6 +539,11 @@ static void tcm_vhost_queue_tm_rsp(struct se_cmd *se_cmd)
return;
}
static void tcm_vhost_aborted_task(struct se_cmd *se_cmd)
{
return;
}
static void tcm_vhost_free_evt(struct vhost_scsi *vs, struct tcm_vhost_evt *evt)
{
vs->vs_events_nr--;
@ -2131,6 +2136,7 @@ static struct target_core_fabric_ops tcm_vhost_ops = {
.queue_data_in = tcm_vhost_queue_data_in,
.queue_status = tcm_vhost_queue_status,
.queue_tm_rsp = tcm_vhost_queue_tm_rsp,
.aborted_task = tcm_vhost_aborted_task,
/*
* Setup callers for generic logic in target_core_fabric_configfs.c
*/