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| author | Jiro SEKIBA <jir@unicus.jp> | 2010-05-02 23:29:04 +0900 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-05-10 11:32:33 +0900 |
| commit | 400ade845cb9930552e791bbd658a0953f68499d (patch) | |
| tree | 169526937ed5d61092680328a2ee1ba4b5221fe9 | |
| parent | 25294d8c376296b1420694317e9856eaaea710ca (diff) | |
| download | blackbird-op-linux-400ade845cb9930552e791bbd658a0953f68499d.tar.gz blackbird-op-linux-400ade845cb9930552e791bbd658a0953f68499d.zip | |
nilfs2: enlarge s_volume_name member in nilfs_super_block
Current s_volume_name has 16 bytes, which is too small as modern filesystem.
s_last_mounted resides just after s_volume_name and has 64 bytes.
s_last_mounted is historically came from ext2, but not used in nilfs2 at all.
Deleting s_last_mounted member and merging that space with s_volume_name
enlarge s_volume_name upto 80 bytes for volume label.
When user land tools see the old header for new disk, it will just ignore
additional bytes stored in s_last_mounted. While, old disk format has only
16 bytes label, it doesn't affects in case seeing the new header for old disk.
Signed-off-by: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| -rw-r--r-- | include/linux/nilfs2_fs.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h index 6505c00f1fc1..8c2c6116e788 100644 --- a/include/linux/nilfs2_fs.h +++ b/include/linux/nilfs2_fs.h @@ -207,8 +207,7 @@ struct nilfs_super_block { __le16 s_segment_usage_size; /* Size of a segment usage */ __u8 s_uuid[16]; /* 128-bit uuid for volume */ - char s_volume_name[16]; /* volume name */ - char s_last_mounted[64]; /* directory where last mounted */ + char s_volume_name[80]; /* volume name */ __le32 s_c_interval; /* Commit interval of segment */ __le32 s_c_block_max; /* Threshold of data amount for |
