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| author | Theodore Ts'o <tytso@mit.edu> | 2008-10-28 18:21:55 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-10-28 18:21:55 +0100 |
| commit | 5e1f8c9e20a92743eefc9a82c2db835213905e26 (patch) | |
| tree | 0c945d1e31b87d1d8c18381f4ffe99122ddb797b /fs/ext3/super.c | |
| parent | ext4: fix printk format warning (diff) | |
| download | linux-5e1f8c9e20a92743eefc9a82c2db835213905e26.tar.xz linux-5e1f8c9e20a92743eefc9a82c2db835213905e26.zip | |
ext3: Add support for non-native signed/unsigned htree hash algorithms
The original ext3 hash algorithms assumed that variables of type char
were signed, as God and K&R intended. Unfortunately, this assumption
is not true on some architectures. Userspace support for marking
filesystems with non-native signed/unsigned chars was added two years
ago, but the kernel-side support was never added (until now).
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'fs/ext3/super.c')
| -rw-r--r-- | fs/ext3/super.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/ext3/super.c b/fs/ext3/super.c index f6c94f232ec1..541d5e4f7f6e 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -1744,6 +1744,18 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent) for (i=0; i < 4; i++) sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); sbi->s_def_hash_version = es->s_def_hash_version; + i = le32_to_cpu(es->s_flags); + if (i & EXT2_FLAGS_UNSIGNED_HASH) + sbi->s_hash_unsigned = 3; + else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { +#ifdef __CHAR_UNSIGNED__ + es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); + sbi->s_hash_unsigned = 3; +#else + es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); +#endif + sb->s_dirt = 1; + } if (sbi->s_blocks_per_group > blocksize * 8) { printk (KERN_ERR |