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authorTheodore Ts'o <tytso@mit.edu>2008-10-28 13:21:55 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-10-28 13:21:55 -0400
commit5e1f8c9e20a92743eefc9a82c2db835213905e26 (patch)
tree0c945d1e31b87d1d8c18381f4ffe99122ddb797b /fs/ext3/super.c
parent8f72fbdf0d92e6127583cc548bf043c60cd4720f (diff)
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.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index f6c94f232ec..541d5e4f7f6 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