diff options
| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-07-22 03:22:20 +0900 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-07-23 10:02:16 +0900 |
| commit | c5ca48aabe8b11674bf1102abe52d17ecc053f9c (patch) | |
| tree | 18c7647b42981d457c59cd4a842ca342a239770d /fs/nilfs2/the_nilfs.c | |
| parent | 1a80a1763fb760b3a84a28df87515f7cdc07a4f4 (diff) | |
| download | linux-c5ca48aabe8b11674bf1102abe52d17ecc053f9c.tar.gz linux-c5ca48aabe8b11674bf1102abe52d17ecc053f9c.tar.bz2 linux-c5ca48aabe8b11674bf1102abe52d17ecc053f9c.zip | |
nilfs2: reject incompatible filesystem
This forces nilfs to check compatibility of feature flags so as to
reject a filesystem with unknown features when it mounts or remounts
the filesystem.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/the_nilfs.c')
| -rw-r--r-- | fs/nilfs2/the_nilfs.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c index f2efc8c5be7f..da67b560f3c3 100644 --- a/fs/nilfs2/the_nilfs.c +++ b/fs/nilfs2/the_nilfs.c @@ -385,11 +385,23 @@ int load_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi) goto skip_recovery; if (s_flags & MS_RDONLY) { + __u64 features; + if (nilfs_test_opt(sbi, NORECOVERY)) { printk(KERN_INFO "NILFS: norecovery option specified. " "skipping roll-forward recovery\n"); goto skip_recovery; } + features = le64_to_cpu(nilfs->ns_sbp[0]->s_feature_compat_ro) & + ~NILFS_FEATURE_COMPAT_RO_SUPP; + if (features) { + printk(KERN_ERR "NILFS: couldn't proceed with " + "recovery because of unsupported optional " + "features (%llx)\n", + (unsigned long long)features); + err = -EROFS; + goto failed_unload; + } if (really_read_only) { printk(KERN_ERR "NILFS: write access " "unavailable, cannot proceed.\n"); @@ -644,6 +656,10 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data) if (err) goto out; + err = nilfs_check_feature_compatibility(sb, sbp); + if (err) + goto out; + blocksize = BLOCK_SIZE << le32_to_cpu(sbp->s_log_block_size); if (sb->s_blocksize != blocksize && !sb_set_blocksize(sb, blocksize)) { @@ -669,6 +685,10 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data) if (err) goto failed_sbh; + err = nilfs_check_feature_compatibility(sb, sbp); + if (err) + goto failed_sbh; + blocksize = BLOCK_SIZE << le32_to_cpu(sbp->s_log_block_size); if (sb->s_blocksize != blocksize) { int hw_blocksize = bdev_logical_block_size(sb->s_bdev); |