diff options
| author | Dmitry Monakhov <dmonakhov@openvz.org> | 2014-12-02 16:11:20 -0500 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2019-04-04 16:14:06 +0100 |
| commit | 5b25a6d0d3d9830a7bd08236de0e7ee532e3b28c (patch) | |
| tree | 155e85435d4c167d10a882af06b312a3ed75bcce /fs | |
| parent | a0b9c0610345fdd4b46d95d5d35763f84698d293 (diff) | |
ext4: ext4_inline_data_fiemap should respect callers argument
commit d952d69e268f833c85c0bafee9f67f9dba85044b upstream.
Currently ext4_inline_data_fiemap ignores requested arguments (start
and len) which may lead endless loop if start != 0. Also fix incorrect
extent length determination.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/ext4.h | 2 | ||||
| -rw-r--r-- | fs/ext4/extents.c | 3 | ||||
| -rw-r--r-- | fs/ext4/inline.c | 19 |
3 files changed, 16 insertions, 8 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 19e2c82d72f1..aa2da07ee7fb 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2712,7 +2712,7 @@ extern struct buffer_head *ext4_get_first_inline_block(struct inode *inode, int *retval); extern int ext4_inline_data_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, - int *has_inline); + int *has_inline, __u64 start, __u64 len); extern void ext4_inline_data_truncate(struct inode *inode, int *has_inline); extern int ext4_convert_inline_data(struct inode *inode); diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 86ac712decf8..289562c42511 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -5153,7 +5153,8 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, if (ext4_has_inline_data(inode)) { int has_inline = 1; - error = ext4_inline_data_fiemap(inode, fieinfo, &has_inline); + error = ext4_inline_data_fiemap(inode, fieinfo, &has_inline, + start, len); if (has_inline) return error; diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index c6259237911a..d24247539ba0 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -1816,11 +1816,12 @@ int ext4_destroy_inline_data(handle_t *handle, struct inode *inode) int ext4_inline_data_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, - int *has_inline) + int *has_inline, __u64 start, __u64 len) { __u64 physical = 0; - __u64 length; - __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_LAST; + __u64 inline_len; + __u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED | + FIEMAP_EXTENT_LAST; int error = 0; struct ext4_iloc iloc; @@ -1829,6 +1830,13 @@ int ext4_inline_data_fiemap(struct inode *inode, *has_inline = 0; goto out; } + inline_len = min_t(size_t, ext4_get_inline_size(inode), + i_size_read(inode)); + if (start >= inline_len) + goto out; + if (start + len < inline_len) + inline_len = start + len; + inline_len -= start; error = ext4_get_inode_loc(inode, &iloc); if (error) @@ -1837,11 +1845,10 @@ int ext4_inline_data_fiemap(struct inode *inode, physical = (__u64)iloc.bh->b_blocknr << inode->i_sb->s_blocksize_bits; physical += (char *)ext4_raw_inode(&iloc) - iloc.bh->b_data; physical += offsetof(struct ext4_inode, i_block); - length = i_size_read(inode); if (physical) - error = fiemap_fill_next_extent(fieinfo, 0, physical, - length, flags); + error = fiemap_fill_next_extent(fieinfo, start, physical, + inline_len, flags); brelse(iloc.bh); out: up_read(&EXT4_I(inode)->xattr_sem); |