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ext4: fix uninit block bitmap initialization when s_meta_first_bg is non-zero

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(cherry picked from commit 8dadb198cb)

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Theodore Ts'o
2009-11-23 07:24:38 -05:00
committed by Greg Kroah-Hartman
parent 9e9ddddfe7
commit 58ffefbe7b
1 changed files with 7 additions and 1 deletions
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8
fs/ext4/balloc.c
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@@ -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;
}
/**