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| author | Theodore Ts'o <tytso@mit.edu> | 2009-11-23 07:24:38 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-11-23 07:24:38 -0500 |
| commit | 8dadb198cb70ef811916668fe67eeec82e8858dd (patch) | |
| tree | e42f0cc333df6807a47678e41599055b6b2c286e | |
| parent | 3f8fb9490efbd300887470a2a880a64e04dcc3f5 (diff) | |
| download | linux-8dadb198cb70ef811916668fe67eeec82e8858dd.tar.gz | |
ext4: fix uninit block bitmap initialization when s_meta_first_bg is non-zero
The number of old-style block group descriptor blocks is s_meta_first_bg when the meta_bg feature flag is set. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@kernel.org
| -rw-r--r-- | fs/ext4/balloc.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index 1d0418980f8d..f3032c919a22 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -761,7 +761,13 @@ static unsigned long ext4_bg_num_gdb_meta(struct super_block *sb, static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb, ext4_group_t group) { - return ext4_bg_has_super(sb, group) ? EXT4_SB(sb)->s_gdb_count : 0; + if (!ext4_bg_has_super(sb, group)) + return 0; + + if (EXT4_HAS_INCOMPAT_FEATURE(sb,EXT4_FEATURE_INCOMPAT_META_BG)) + return le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg); + else + return EXT4_SB(sb)->s_gdb_count; } /** |