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| author | Eric Sandeen <sandeen@redhat.com> | 2009-05-02 03:32:06 (GMT) |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-05-02 03:32:06 (GMT) |
| commit | c9877b205f6ce7943bb95281342f4001cc1c00ec (patch) | |
| tree | 2556179d7591d8fa7e770e3f2be15a467fe59a6e /fs/ext4/extents.c | |
| parent | 19ba0559f9ce104171ab16706893ce01f03ef116 (diff) | |
| download | linux-c9877b205f6ce7943bb95281342f4001cc1c00ec.tar.xz | |
ext4: fix for fiemap last-block test
Carl Henrik Lunde reported and debugged this; the test for the
last allocated block was comparing bytes to blocks in this test:
if (logical + length - 1 == EXT_MAX_BLOCK ||
ext4_ext_next_allocated_block(path) == EXT_MAX_BLOCK)
flags |= FIEMAP_EXTENT_LAST;
so any extent which ended right at 4G was stopping the extent
walk. Just replacing these values with the extent block &
length should fix it.
Also give blksize_bits a saner type, and reverse the order
of the tests to make the more likely case tested first.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reported-by: Carl Henrik Lunde <chlunde@ping.uio.no>
Tested-by: Carl Henrik Lunde <chlunde@ping.uio.no>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/extents.c')
| -rw-r--r-- | fs/ext4/extents.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index ea5c476..5f72952 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3196,7 +3196,7 @@ static int ext4_ext_fiemap_cb(struct inode *inode, struct ext4_ext_path *path, void *data) { struct fiemap_extent_info *fieinfo = data; - unsigned long blksize_bits = inode->i_sb->s_blocksize_bits; + unsigned char blksize_bits = inode->i_sb->s_blocksize_bits; __u64 logical; __u64 physical; __u64 length; @@ -3243,8 +3243,8 @@ static int ext4_ext_fiemap_cb(struct inode *inode, struct ext4_ext_path *path, * * XXX this might miss a single-block extent at EXT_MAX_BLOCK */ - if (logical + length - 1 == EXT_MAX_BLOCK || - ext4_ext_next_allocated_block(path) == EXT_MAX_BLOCK) + if (ext4_ext_next_allocated_block(path) == EXT_MAX_BLOCK || + newex->ec_block + newex->ec_len - 1 == EXT_MAX_BLOCK) flags |= FIEMAP_EXTENT_LAST; error = fiemap_fill_next_extent(fieinfo, logical, physical, |