diff options
Diffstat (limited to 'fs/ext4/extents.c')
| -rw-r--r-- | fs/ext4/extents.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index c56877972b0..cae75c122ea 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3767,7 +3767,6 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len) { ext4_lblk_t start_blk; - ext4_lblk_t len_blks; int error = 0; /* fallback to generic here if not in extents fmt */ @@ -3781,8 +3780,14 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { error = ext4_xattr_fiemap(inode, fieinfo); } else { + ext4_lblk_t len_blks; + __u64 last_blk; + start_blk = start >> inode->i_sb->s_blocksize_bits; - len_blks = len >> inode->i_sb->s_blocksize_bits; + last_blk = (start + len - 1) >> inode->i_sb->s_blocksize_bits; + if (last_blk >= EXT_MAX_BLOCK) + last_blk = EXT_MAX_BLOCK-1; + len_blks = ((ext4_lblk_t) last_blk) - start_blk + 1; /* * Walk the extent tree gathering extent information. |