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| author | Hannes Reinecke <hare@suse.de> | 2013-07-01 15:16:26 +0200 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-08-23 12:54:53 -0400 |
| commit | 7e782af57649f8a8e943d80104c946a5cd7af7cc (patch) | |
| tree | 3ad0cfe04ce16a2a07c50cdfa55a60149de50fc7 | |
| parent | a9d6ceb838755c24dde8a0ca02c3378926fc63db (diff) | |
| download | linux-7e782af57649f8a8e943d80104c946a5cd7af7cc.tar.gz linux-7e782af57649f8a8e943d80104c946a5cd7af7cc.tar.bz2 linux-7e782af57649f8a8e943d80104c946a5cd7af7cc.zip | |
[SCSI] Return ENODATA on medium error
When a medium error is detected the SCSI stack should return
ENODATA to the upper layers.
[jejb: fix whitespace error]
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
| -rw-r--r-- | block/blk-core.c | 3 | ||||
| -rw-r--r-- | drivers/md/dm-mpath.c | 16 | ||||
| -rw-r--r-- | drivers/scsi/scsi_error.c | 2 | ||||
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 5 | ||||
| -rw-r--r-- | include/scsi/scsi.h | 1 |
5 files changed, 25 insertions, 2 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 68ce4d53a528..c04505358342 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -2321,6 +2321,9 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes) case -ENOSPC: error_type = "critical space allocation"; break; + case -ENODATA: + error_type = "critical medium"; + break; case -EIO: default: error_type = "I/O"; diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 5adede17ddf6..b759a127f9c3 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -1261,6 +1261,20 @@ static void activate_path(struct work_struct *work) pg_init_done, pgpath); } +static int noretry_error(int error) +{ + switch (error) { + case -EOPNOTSUPP: + case -EREMOTEIO: + case -EILSEQ: + case -ENODATA: + return 1; + } + + /* Anything else could be a path failure, so should be retried */ + return 0; +} + /* * end_io handling */ @@ -1284,7 +1298,7 @@ static int do_end_io(struct multipath *m, struct request *clone, if (!error && !clone->errors) return 0; /* I/O complete */ - if (error == -EOPNOTSUPP || error == -EREMOTEIO || error == -EILSEQ) + if (noretry_error(error)) return error; if (mpio->pgpath) diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 1b1298ce0e71..a46c3dddcf70 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -371,7 +371,7 @@ static int scsi_check_sense(struct scsi_cmnd *scmd) if (sshdr.asc == 0x11 || /* UNRECOVERED READ ERR */ sshdr.asc == 0x13 || /* AMNF DATA FIELD */ sshdr.asc == 0x14) { /* RECORD NOT FOUND */ - set_host_byte(scmd, DID_TARGET_FAILURE); + set_host_byte(scmd, DID_MEDIUM_ERROR); return SUCCESS; } return NEEDS_RETRY; diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 49020d52d685..36b5c898db9d 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -727,6 +727,7 @@ EXPORT_SYMBOL(scsi_release_buffers); * -EREMOTEIO permanent target failure, do not retry * -EBADE permanent nexus failure, retry on other path * -ENOSPC No write space available + * -ENODATA Medium error * -EIO unspecified I/O error */ static int __scsi_error_from_host_byte(struct scsi_cmnd *cmd, int result) @@ -749,6 +750,10 @@ static int __scsi_error_from_host_byte(struct scsi_cmnd *cmd, int result) set_host_byte(cmd, DID_OK); error = -ENOSPC; break; + case DID_MEDIUM_ERROR: + set_host_byte(cmd, DID_OK); + error = -ENODATA; + break; default: error = -EIO; break; diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index d0387d84dd68..d477bfb73fb9 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -458,6 +458,7 @@ static inline int scsi_is_wlun(unsigned int lun) #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 DID_MEDIUM_ERROR 0x13 /* Medium error */ #define DRIVER_OK 0x00 /* Driver status */ /* |