diff options
Diffstat (limited to 'include/linux/raid/md_p.h')
| -rw-r--r-- | include/linux/raid/md_p.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/include/linux/raid/md_p.h b/include/linux/raid/md_p.h index 8c0a3adc5df5..ee753536ab70 100644 --- a/include/linux/raid/md_p.h +++ b/include/linux/raid/md_p.h @@ -233,7 +233,10 @@ struct mdp_superblock_1 { __le32 delta_disks; /* change in number of raid_disks */ __le32 new_layout; /* new layout */ __le32 new_chunk; /* new chunk size (512byte sectors) */ - __u8 pad1[128-124]; /* set to 0 when written */ + __le32 new_offset; /* signed number to add to data_offset in new + * layout. 0 == no-change. This can be + * different on each device in the array. + */ /* constant this-device information - 64 bytes */ __le64 data_offset; /* sector start of data, often 0 */ @@ -281,10 +284,18 @@ struct mdp_superblock_1 { * active device with same 'role'. * 'recovery_offset' is also set. */ +#define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number + * of devices, but is going + * backwards anyway. + */ +#define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */ #define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \ |MD_FEATURE_RECOVERY_OFFSET \ |MD_FEATURE_RESHAPE_ACTIVE \ |MD_FEATURE_BAD_BLOCKS \ - |MD_FEATURE_REPLACEMENT) + |MD_FEATURE_REPLACEMENT \ + |MD_FEATURE_RESHAPE_BACKWARDS \ + |MD_FEATURE_NEW_OFFSET \ + ) #endif |