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| author | Andreas Dilger <adilger@dilger.ca> | 2019-02-14 17:52:18 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-22 07:37:46 +0200 |
| commit | e8816d3bc5956a3d4d0f00651138a8a3b36a07bf (patch) | |
| tree | 09378abfc114e6fcb38586dbe7557b24f0eade28 | |
| parent | 6172ae55a187378b091282c7a5b4895635e63371 (diff) | |
| download | linux-rpi3-e8816d3bc5956a3d4d0f00651138a8a3b36a07bf.tar.gz linux-rpi3-e8816d3bc5956a3d4d0f00651138a8a3b36a07bf.tar.bz2 linux-rpi3-e8816d3bc5956a3d4d0f00651138a8a3b36a07bf.zip | |
ext4: don't update s_rev_level if not required
commit c9e716eb9b3455a83ed7c5f5a81256a3da779a95 upstream.
Don't update the superblock s_rev_level during mount if it isn't
actually necessary, only if superblock features are being set by
the kernel. This was originally added for ext3 since it always
set the INCOMPAT_RECOVER and HAS_JOURNAL features during mount,
but this is not needed since no journal mode was added to ext4.
That will allow Geert to mount his 20-year-old ext2 rev 0.0 m68k
filesystem, as a testament of the backward compatibility of ext4.
Fixes: 0390131ba84f ("ext4: Allow ext4 to run without a journal")
Signed-off-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/ext4/ext4.h | 6 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 1 | ||||
| -rw-r--r-- | fs/ext4/super.c | 1 |
3 files changed, 5 insertions, 3 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 2ddf7833350d..1ee51d3a978a 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1670,6 +1670,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 +extern void ext4_update_dynamic_rev(struct super_block *sb); + #define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \ static inline bool ext4_has_feature_##name(struct super_block *sb) \ { \ @@ -1678,6 +1680,7 @@ static inline bool ext4_has_feature_##name(struct super_block *sb) \ } \ static inline void ext4_set_feature_##name(struct super_block *sb) \ { \ + ext4_update_dynamic_rev(sb); \ EXT4_SB(sb)->s_es->s_feature_compat |= \ cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \ } \ @@ -1695,6 +1698,7 @@ static inline bool ext4_has_feature_##name(struct super_block *sb) \ } \ static inline void ext4_set_feature_##name(struct super_block *sb) \ { \ + ext4_update_dynamic_rev(sb); \ EXT4_SB(sb)->s_es->s_feature_ro_compat |= \ cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \ } \ @@ -1712,6 +1716,7 @@ static inline bool ext4_has_feature_##name(struct super_block *sb) \ } \ static inline void ext4_set_feature_##name(struct super_block *sb) \ { \ + ext4_update_dynamic_rev(sb); \ EXT4_SB(sb)->s_es->s_feature_incompat |= \ cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \ } \ @@ -2679,7 +2684,6 @@ do { \ #endif -extern void ext4_update_dynamic_rev(struct super_block *sb); extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb, __u32 compat); extern int ext4_update_rocompat_feature(handle_t *handle, diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 18884f39610f..67e8aa35197e 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5320,7 +5320,6 @@ static int ext4_do_update_inode(handle_t *handle, err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh); if (err) goto out_brelse; - ext4_update_dynamic_rev(sb); ext4_set_feature_large_file(sb); ext4_handle_sync(handle); err = ext4_handle_dirty_super(handle, sb); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 07d73fb22b60..a270391228af 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2259,7 +2259,6 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); le16_add_cpu(&es->s_mnt_count, 1); ext4_update_tstamp(es, s_mtime); - ext4_update_dynamic_rev(sb); if (sbi->s_journal) ext4_set_feature_journal_needs_recovery(sb); |