From 4a9cdec73f79b2858e9ecf0b6cfac7f6b200bf3a Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Tue, 29 Jun 2010 11:00:23 -0400 Subject: [PATCH] ext4: Add new superblock fields reserved for the Next3 snapshot feature Signed-off-by: "Theodore Ts'o" --- fs/ext4/ext4.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 8b6d297c8c7..3864a277545 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__ -- 2.39.3