Commit 9111e568 authored by Keith Busch's avatar Keith Busch Committed by Jens Axboe

block: Provide blk_status_t decoding for path errors

This patch provides a common decoder for block status path related errors
that may be retried so various entities wishing to consult this do not
have to duplicate this decision.
Acked-by: default avatarMike Snitzer <snitzer@redhat.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 908e4564
...@@ -39,6 +39,34 @@ typedef u8 __bitwise blk_status_t; ...@@ -39,6 +39,34 @@ typedef u8 __bitwise blk_status_t;
#define BLK_STS_AGAIN ((__force blk_status_t)12) #define BLK_STS_AGAIN ((__force blk_status_t)12)
/**
* blk_path_error - returns true if error may be path related
* @error: status the request was completed with
*
* Description:
* This classifies block error status into non-retryable errors and ones
* that may be successful if retried on a failover path.
*
* Return:
* %false - retrying failover path will not help
* %true - may succeed if retried
*/
static inline bool blk_path_error(blk_status_t error)
{
switch (error) {
case BLK_STS_NOTSUPP:
case BLK_STS_NOSPC:
case BLK_STS_TARGET:
case BLK_STS_NEXUS:
case BLK_STS_MEDIUM:
case BLK_STS_PROTECTION:
return false;
}
/* Anything else could be a path failure, so should be retried */
return true;
}
struct blk_issue_stat { struct blk_issue_stat {
u64 stat; u64 stat;
}; };
......
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