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-rw-r--r--include/uapi/linux/raid/md_p.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/uapi/linux/raid/md_p.h b/include/uapi/linux/raid/md_p.h
index c3e654c..9930f3e 100644
--- a/include/uapi/linux/raid/md_p.h
+++ b/include/uapi/linux/raid/md_p.h
@@ -84,6 +84,10 @@
#define MD_DISK_CANDIDATE 5 /* disk is added as spare (local) until confirmed
* For clustered enviroments only.
*/
+#define MD_DISK_FAILFAST 10 /* Send REQ_FAILFAST if there are multiple
+ * devices available - and don't try to
+ * correct read errors.
+ */
#define MD_DISK_WRITEMOSTLY 9 /* disk is "write-mostly" is RAID1 config.
* read requests will only be sent here in
@@ -265,8 +269,9 @@ struct mdp_superblock_1 {
__le32 dev_number; /* permanent identifier of this device - not role in raid */
__le32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
__u8 device_uuid[16]; /* user-space setable, ignored by kernel */
- __u8 devflags; /* per-device flags. Only one defined...*/
+ __u8 devflags; /* per-device flags. Only two defined...*/
#define WriteMostly1 1 /* mask for writemostly flag in above */
+#define FailFast1 2 /* Should avoid retries and fixups and just fail */
/* Bad block log. If there are any bad blocks the feature flag is set.
* If offset and size are non-zero, that space is reserved and available
*/
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