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authorZhu Yanhai <zhu.yanhai@gmail.com>2009-08-12 14:17:59 +0800
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-09-14 18:27:14 +0900
commit43be0ec0387a5ccce2e064cb78502e7b2b4dd590 (patch)
treee412246fce3f999b46b960ef416f1f10653ca895 /fs/nilfs2/super.c
parenta4f0b9c5b4ae83636dafde8f3a0e04b5e411a0f3 (diff)
nilfs2: add more check routines in mount process
nilfs2: Add more safeguard routines and protections in mount process, which also makes nilfs2 report consistency error messages when checkpoint number is invalid. Signed-off-by: Zhu Yanhai <zhu.yanhai@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/super.c')
-rw-r--r--fs/nilfs2/super.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 019752f7d2d..50284add788 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -792,10 +792,15 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent,
if (sb->s_flags & MS_RDONLY) {
if (nilfs_test_opt(sbi, SNAPSHOT)) {
+ down_read(&nilfs->ns_segctor_sem);
err = nilfs_cpfile_is_snapshot(nilfs->ns_cpfile,
sbi->s_snapshot_cno);
- if (err < 0)
+ up_read(&nilfs->ns_segctor_sem);
+ if (err < 0) {
+ if (err == -ENOENT)
+ err = -EINVAL;
goto failed_sbi;
+ }
if (!err) {
printk(KERN_ERR
"NILFS: The specified checkpoint is "