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| author | Artur Paszkiewicz | 2017-03-09 09:59:57 +0100 |
|---|---|---|
| committer | Shaohua Li | 2017-03-17 00:55:53 +0100 |
| commit | ea0213e0c7cc1c1b52badf27bd7db4f50a67baaa (patch) | |
| tree | cc45803ce7ac13964e38403e03f9ea06559fa5e0 /include/uapi/linux/raid | |
| parent | md/r5cache: improve recovery with read ahead page pool (diff) | |
| download | kernel-qcow2-linux-ea0213e0c7cc1c1b52badf27bd7db4f50a67baaa.tar.gz kernel-qcow2-linux-ea0213e0c7cc1c1b52badf27bd7db4f50a67baaa.tar.xz kernel-qcow2-linux-ea0213e0c7cc1c1b52badf27bd7db4f50a67baaa.zip | |
md: superblock changes for PPL
Include information about PPL location and size into mdp_superblock_1
and copy it to/from rdev. Because PPL is mutually exclusive with bitmap,
put it in place of 'bitmap_offset'. Add a new flag MD_FEATURE_PPL for
'feature_map', analogically to MD_FEATURE_BITMAP_OFFSET. Add MD_HAS_PPL
to mddev->flags to indicate that PPL is enabled on an array.
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'include/uapi/linux/raid')
| -rw-r--r-- | include/uapi/linux/raid/md_p.h | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/include/uapi/linux/raid/md_p.h b/include/uapi/linux/raid/md_p.h index 9930f3e9040f..fe2112810c43 100644 --- a/include/uapi/linux/raid/md_p.h +++ b/include/uapi/linux/raid/md_p.h @@ -242,10 +242,18 @@ struct mdp_superblock_1 { __le32 chunksize; /* in 512byte sectors */ __le32 raid_disks; - __le32 bitmap_offset; /* sectors after start of superblock that bitmap starts - * NOTE: signed, so bitmap can be before superblock - * only meaningful of feature_map[0] is set. - */ + union { + __le32 bitmap_offset; /* sectors after start of superblock that bitmap starts + * NOTE: signed, so bitmap can be before superblock + * only meaningful of feature_map[0] is set. + */ + + /* only meaningful when feature_map[MD_FEATURE_PPL] is set */ + struct { + __le16 offset; /* sectors from start of superblock that ppl starts (signed) */ + __le16 size; /* ppl size in sectors */ + } ppl; + }; /* These are only valid with feature bit '4' */ __le32 new_level; /* new level we are reshaping to */ @@ -318,6 +326,7 @@ struct mdp_superblock_1 { */ #define MD_FEATURE_CLUSTERED 256 /* clustered MD */ #define MD_FEATURE_JOURNAL 512 /* support write cache */ +#define MD_FEATURE_PPL 1024 /* support PPL */ #define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \ |MD_FEATURE_RECOVERY_OFFSET \ |MD_FEATURE_RESHAPE_ACTIVE \ @@ -328,6 +337,7 @@ struct mdp_superblock_1 { |MD_FEATURE_RECOVERY_BITMAP \ |MD_FEATURE_CLUSTERED \ |MD_FEATURE_JOURNAL \ + |MD_FEATURE_PPL \ ) struct r5l_payload_header { |