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| author | Theodore Ts'o <tytso@mit.edu> | 2010-06-29 11:00:23 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2010-06-29 11:00:23 -0400 |
| commit | 4a9cdec73f79b2858e9ecf0b6cfac7f6b200bf3a (patch) | |
| tree | 0e06b201e009e5e2a661811e61ef3184138bb8d3 /fs/ext4/ext4.h | |
| parent | c6ac12a6159c802ae8b757dd13563564e64333df (diff) | |
| download | linux-4a9cdec73f79b2858e9ecf0b6cfac7f6b200bf3a.tar.bz2 | |
ext4: Add new superblock fields reserved for the Next3 snapshot feature
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 8b6d297c8c73..3864a2775458 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -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__ |