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target/iblock: Add iblock_do_unmap() helper

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Add helper iblock_do_unmap() to remove duplicated code in
iblock_execute_write_same_unmap() and iblock_execute_unmap().

Cc: Christoph Hellwig <hch@lst.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Asias He 2013-02-25 14:03:45 +08:00 committed by Nicholas Bellinger
parent 43f55bbb14
commit dbc21c5abb
1 changed files with 25 additions and 16 deletions
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41
drivers/target/target_core_iblock.c
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@ -379,6 +379,21 @@ iblock_execute_sync_cache(struct se_cmd *cmd)
return 0;
}
static sense_reason_t
iblock_do_unmap(struct se_cmd *cmd, struct block_device *bdev,
sector_t lba, sector_t nolb)
{
int ret;
ret = blkdev_issue_discard(bdev, lba, nolb, GFP_KERNEL, 0);
if (ret < 0) {
pr_err("blkdev_issue_discard() failed: %d\n", ret);
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
return 0;
}
static sense_reason_t
iblock_execute_unmap(struct se_cmd *cmd)
{
@ -389,7 +404,7 @@ iblock_execute_unmap(struct se_cmd *cmd)
int size;
u32 range;
sense_reason_t ret = 0;
int dl, bd_dl, err;
int dl, bd_dl;
/* We never set ANC_SUP */
if (cmd->t_task_cdb[1])
@ -446,14 +461,9 @@ iblock_execute_unmap(struct se_cmd *cmd)
goto err;
}
err = blkdev_issue_discard(ib_dev->ibd_bd, lba, range,
GFP_KERNEL, 0);
if (err < 0) {
pr_err("blkdev_issue_discard() failed: %d\n",
err);
ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
ret = iblock_do_unmap(cmd, ib_dev->ibd_bd, lba, range);
if (ret)
goto err;
}
ptr += 16;
size -= 16;
@ -469,15 +479,14 @@ err:
static sense_reason_t
iblock_execute_write_same_unmap(struct se_cmd *cmd)
{
struct iblock_dev *ib_dev = IBLOCK_DEV(cmd->se_dev);
int rc;
struct block_device *bdev = IBLOCK_DEV(cmd->se_dev)->ibd_bd;
sector_t lba = cmd->t_task_lba;
sector_t nolb = sbc_get_write_same_sectors(cmd);
int ret;
rc = blkdev_issue_discard(ib_dev->ibd_bd, cmd->t_task_lba,
sbc_get_write_same_sectors(cmd), GFP_KERNEL, 0);
if (rc < 0) {
pr_warn("blkdev_issue_discard() failed: %d\n", rc);
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
ret = iblock_do_unmap(cmd, bdev, lba, nolb);
if (ret)
return ret;
target_complete_cmd(cmd, GOOD);
return 0;