diff options
| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2011-04-30 18:56:12 +0900 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2011-05-10 22:21:45 +0900 |
| commit | 56eb55388580ebd51f3bbd9af40ebb56849356af (patch) | |
| tree | 7d1ed80fa05150c40a75d5755981c8d949ae634b /fs/nilfs2 | |
| parent | 6c6de1aa65189c37cc3c9af78da756c06a99899b (diff) | |
| download | lwn-56eb55388580ebd51f3bbd9af40ebb56849356af.tar.gz lwn-56eb55388580ebd51f3bbd9af40ebb56849356af.zip | |
nilfs2: zero fill unused portion of super root block
The super root block is newly-allocated each time it is written back
to disk, so unused portion of the block should be cleared.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2')
| -rw-r--r-- | fs/nilfs2/inode.c | 10 | ||||
| -rw-r--r-- | fs/nilfs2/segment.c | 7 |
2 files changed, 15 insertions, 2 deletions
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index 2cc8c087b2d5..699170e0f308 100644 --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -596,6 +596,16 @@ void nilfs_write_inode_common(struct inode *inode, raw_inode->i_flags = cpu_to_le32(ii->i_flags); raw_inode->i_generation = cpu_to_le32(inode->i_generation); + if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) { + struct the_nilfs *nilfs = inode->i_sb->s_fs_info; + + /* zero-fill unused portion in the case of super root block */ + raw_inode->i_xattr = 0; + raw_inode->i_pad = 0; + memset((void *)raw_inode + sizeof(*raw_inode), 0, + nilfs->ns_inode_size - sizeof(*raw_inode)); + } + if (has_bmap) nilfs_bmap_write(ii->i_bmap, raw_inode); else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 8006d0cd4440..8a2b428b1838 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -889,12 +889,14 @@ static void nilfs_segctor_fill_in_super_root(struct nilfs_sc_info *sci, { struct buffer_head *bh_sr; struct nilfs_super_root *raw_sr; - unsigned isz = nilfs->ns_inode_size; + unsigned isz, srsz; bh_sr = NILFS_LAST_SEGBUF(&sci->sc_segbufs)->sb_super_root; raw_sr = (struct nilfs_super_root *)bh_sr->b_data; + isz = nilfs->ns_inode_size; + srsz = NILFS_SR_BYTES(isz); - raw_sr->sr_bytes = cpu_to_le16(NILFS_SR_BYTES(isz)); + raw_sr->sr_bytes = cpu_to_le16(srsz); raw_sr->sr_nongc_ctime = cpu_to_le64(nilfs_doing_gc() ? nilfs->ns_nongc_ctime : sci->sc_seg_ctime); @@ -906,6 +908,7 @@ static void nilfs_segctor_fill_in_super_root(struct nilfs_sc_info *sci, NILFS_SR_CPFILE_OFFSET(isz), 1); nilfs_write_inode_common(nilfs->ns_sufile, (void *)raw_sr + NILFS_SR_SUFILE_OFFSET(isz), 1); + memset((void *)raw_sr + srsz, 0, nilfs->ns_blocksize - srsz); } static void nilfs_redirty_inodes(struct list_head *head) |