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target/user: Use sense_reason_t in tcmu_queue_cmd_ring 

Instead of using -ERROR-style returns, use sense_reason_t. This lets us
remove tcmu_pass_op(), and return more correct sense values.

Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Andy Grover 2016-10-06 10:07:07 -05:00 committed by Nicholas Bellinger
parent 1001354ca3
commit 02eb924fab
1 changed files with 10 additions and 19 deletions
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29
drivers/target/target_core_user.c
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@ -389,7 +389,8 @@ static bool is_ring_space_avail(struct tcmu_dev *udev, size_t cmd_size, size_t d
return true;
}
static int tcmu_queue_cmd_ring(struct tcmu_cmd *tcmu_cmd)
static sense_reason_t
tcmu_queue_cmd_ring(struct tcmu_cmd *tcmu_cmd)
{
struct tcmu_dev *udev = tcmu_cmd->tcmu_dev;
struct se_cmd *se_cmd = tcmu_cmd->se_cmd;
@ -405,7 +406,7 @@ static int tcmu_queue_cmd_ring(struct tcmu_cmd *tcmu_cmd)
DECLARE_BITMAP(old_bitmap, DATA_BLOCK_BITS);
if (test_bit(TCMU_DEV_BIT_BROKEN, &udev->flags))
return -EINVAL;
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
/*
* Must be a certain minimum size for response sense info, but
@ -450,7 +451,7 @@ static int tcmu_queue_cmd_ring(struct tcmu_cmd *tcmu_cmd)
finish_wait(&udev->wait_cmdr, &__wait);
if (!ret) {
pr_warn("tcmu: command timed out\n");
return -ETIMEDOUT;
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
}
spin_lock_irq(&udev->cmdr_lock);
@ -526,10 +527,11 @@ static int tcmu_queue_cmd_ring(struct tcmu_cmd *tcmu_cmd)
mod_timer(&udev->timeout,
round_jiffies_up(jiffies + msecs_to_jiffies(TCMU_TIME_OUT)));
return 0;
return TCM_NO_SENSE;
}
static int tcmu_queue_cmd(struct se_cmd *se_cmd)
static sense_reason_t
tcmu_queue_cmd(struct se_cmd *se_cmd)
{
struct se_device *se_dev = se_cmd->se_dev;
struct tcmu_dev *udev = TCMU_DEV(se_dev);
@ -538,10 +540,10 @@ static int tcmu_queue_cmd(struct se_cmd *se_cmd)
tcmu_cmd = tcmu_alloc_cmd(se_cmd);
if (!tcmu_cmd)
return -ENOMEM;
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
ret = tcmu_queue_cmd_ring(tcmu_cmd);
if (ret < 0) {
if (ret != TCM_NO_SENSE) {
pr_err("TCMU: Could not queue command\n");
spin_lock_irq(&udev->commands_lock);
idr_remove(&udev->commands, tcmu_cmd->cmd_id);
@ -1128,21 +1130,10 @@ static sector_t tcmu_get_blocks(struct se_device *dev)
dev->dev_attrib.block_size);
}
static sense_reason_t
tcmu_pass_op(struct se_cmd *se_cmd)
{
int ret = tcmu_queue_cmd(se_cmd);
if (ret != 0)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
else
return TCM_NO_SENSE;
}
static sense_reason_t
tcmu_parse_cdb(struct se_cmd *cmd)
{
return passthrough_parse_cdb(cmd, tcmu_pass_op);
return passthrough_parse_cdb(cmd, tcmu_queue_cmd);
}
static const struct target_backend_ops tcmu_ops = {