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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-04-30 18:56:12 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2011-05-10 22:21:45 +0900
commit56eb55388580ebd51f3bbd9af40ebb56849356af (patch)
tree7d1ed80fa05150c40a75d5755981c8d949ae634b /fs/nilfs2/segment.c
parent6c6de1aa65189c37cc3c9af78da756c06a99899b (diff)
downloadlinux-stericsson-56eb55388580ebd51f3bbd9af40ebb56849356af.tar.gz
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/segment.c')
-rw-r--r--fs/nilfs2/segment.c7
1 files changed, 5 insertions, 2 deletions
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)