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authorJiro SEKIBA <jir@unicus.jp>2010-05-02 18:29:04 +0400
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-05-10 06:32:33 +0400
commit400ade845cb9930552e791bbd658a0953f68499d (patch)
tree169526937ed5d61092680328a2ee1ba4b5221fe9 /include/linux/nilfs2_fs.h
parent25294d8c376296b1420694317e9856eaaea710ca (diff)
downloadlinux-400ade845cb9930552e791bbd658a0953f68499d.tar.xz
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>
Diffstat (limited to 'include/linux/nilfs2_fs.h')
-rw-r--r--include/linux/nilfs2_fs.h3
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