diff options
Diffstat (limited to 'drivers/md/md.h')
| -rw-r--r-- | drivers/md/md.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index bc6712e..5c08f84 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -30,6 +30,16 @@ #define MaxSector (~(sector_t)0) /* + * These flags should really be called "NO_RETRY" rather than + * "FAILFAST" because they don't make any promise about time lapse, + * only about the number of retries, which will be zero. + * REQ_FAILFAST_DRIVER is not included because + * Commit: 4a27446f3e39 ("[SCSI] modify scsi to handle new fail fast flags.") + * seems to suggest that the errors it avoids retrying should usually + * be retried. + */ +#define MD_FAILFAST (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT) +/* * MD's 'extended' device */ struct md_rdev { @@ -177,6 +187,10 @@ enum flag_bits { * It is expects that no bad block log * is present. */ + LastDev, /* Seems to be the last working dev as + * it didn't fail, so don't use FailFast + * any more for metadata + */ }; static inline int is_badblock(struct md_rdev *rdev, sector_t s, int sectors, @@ -213,6 +227,11 @@ enum mddev_flags { MD_CLUSTER_RESYNC_LOCKED, /* cluster raid only, which means node * already took resync lock, need to * release the lock */ + MD_FAILFAST_SUPPORTED, /* Using MD_FAILFAST on metadata writes is + * supported as calls to md_error() will + * never cause the array to become failed. + */ + MD_NEED_REWRITE, /* metadata write needs to be repeated */ }; #define MD_UPDATE_SB_FLAGS (BIT(MD_CHANGE_DEVS) | \ BIT(MD_CHANGE_CLEAN) | \ @@ -628,7 +647,7 @@ extern int mddev_congested(struct mddev *mddev, int bits); extern void md_flush_request(struct mddev *mddev, struct bio *bio); extern void md_super_write(struct mddev *mddev, struct md_rdev *rdev, sector_t sector, int size, struct page *page); -extern void md_super_wait(struct mddev *mddev); +extern int md_super_wait(struct mddev *mddev); extern int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, struct page *page, int op, int op_flags, bool metadata_op); |
