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ext4: Add new superblock fields reserved for the Next3 snapshot feature

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Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2010-06-29 11:00:23 -04:00
parent c6ac12a615
commit 4a9cdec73f
1 changed files with 7 additions and 1 deletions
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8
fs/ext4/ext4.h
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@ -1002,7 +1002,13 @@ struct ext4_super_block {
__u8 s_reserved_char_pad2;
__le16 s_reserved_pad;
__le64 s_kbytes_written; /* nr of lifetime kilobytes written */
__u32 s_reserved[160]; /* Padding to the end of the block */
__le32 s_snapshot_inum; /* Inode number of active snapshot */
__le32 s_snapshot_id; /* sequential ID of active snapshot */
__le64 s_snapshot_r_blocks_count; /* reserved blocks for active
snapshot's future use */
__le32 s_snapshot_list; /* inode number of the head of the
on-disk snapshot list */
__u32 s_reserved[155]; /* Padding to the end of the block */
};
#ifdef __KERNEL__