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[SCSI] return ENOSPC on thin provisioning failure

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When the thin provisioning hard threshold is reached we
should return ENOSPC to inform upper layers about this fact.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Hannes Reinecke 2013-07-01 15:16:25 +02:00 committed by James Bottomley
parent 87f14e658f
commit a9d6ceb838
4 changed files with 15 additions and 1 deletions
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3
block/blk-core.c
View File

@ -2318,6 +2318,9 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
case -ETIMEDOUT:
error_type = "timeout";
break;
case -ENOSPC:
error_type = "critical space allocation";
break;
case -EIO:
default:
error_type = "I/O";

7
drivers/scsi/scsi_error.c
View File

@ -354,11 +354,16 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
return SUCCESS;
/* these are not supported */
case DATA_PROTECT:
if (sshdr.asc == 0x27 && sshdr.ascq == 0x07) {
/* Thin provisioning hard threshold reached */
set_host_byte(scmd, DID_ALLOC_FAILURE);
return SUCCESS;
}
case COPY_ABORTED:
case VOLUME_OVERFLOW:
case MISCOMPARE:
case BLANK_CHECK:
case DATA_PROTECT:
set_host_byte(scmd, DID_TARGET_FAILURE);
return SUCCESS;

5
drivers/scsi/scsi_lib.c
View File

@ -726,6 +726,7 @@ EXPORT_SYMBOL(scsi_release_buffers);
* -ENOLINK temporary transport failure
* -EREMOTEIO permanent target failure, do not retry
* -EBADE permanent nexus failure, retry on other path
* -ENOSPC No write space available
* -EIO unspecified I/O error
*/
static int __scsi_error_from_host_byte(struct scsi_cmnd *cmd, int result)
@ -744,6 +745,10 @@ static int __scsi_error_from_host_byte(struct scsi_cmnd *cmd, int result)
set_host_byte(cmd, DID_OK);
error = -EBADE;
break;
case DID_ALLOC_FAILURE:
set_host_byte(cmd, DID_OK);
error = -ENOSPC;
break;
default:
error = -EIO;
break;

1
include/scsi/scsi.h
View File

@ -457,6 +457,7 @@ static inline int scsi_is_wlun(unsigned int lun)
* other paths */
#define DID_NEXUS_FAILURE 0x11 /* Permanent nexus failure, retry on other
* paths might yield different results */
#define DID_ALLOC_FAILURE 0x12 /* Space allocation on the device failed */
#define DRIVER_OK 0x00 /* Driver status */
/*