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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/usb/gadget/tcm_usb_gadget.c
View file

@ -1471,6 +1471,11 @@ static void usbg_queue_tm_rsp(struct se_cmd *se_cmd)
{
}
static void usbg_aborted_task(struct se_cmd *se_cmd)
{
return;
}
static const char *usbg_check_wwn(const char *name)
{
const char *n;
@ -1897,6 +1902,7 @@ static struct target_core_fabric_ops usbg_ops = {
.queue_data_in = usbg_send_read_response,
.queue_status = usbg_send_status_response,
.queue_tm_rsp = usbg_queue_tm_rsp,
.aborted_task = usbg_aborted_task,
.check_stop_free = usbg_check_stop_free,
.fabric_make_wwn = usbg_make_tport,