Commit 9cb9cfc9 authored by Chengyu Song's avatar Chengyu Song Committed by Jiri Slaby

btrfs: incorrect handling for fiemap_fill_next_extent return

commit 26e726af upstream.

fiemap_fill_next_extent returns 0 on success, -errno on error, 1 if this was
the last extent that will fit in user array. If 1 is returned, the return
value may eventually returned to user space, which should not happen, according
to manpage of ioctl.
Signed-off-by: default avatarChengyu Song <csong84@gatech.edu>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.cz>
Reviewed-by: default avatarLiu Bo <bo.li.liu@oracle.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
parent 27ea4a8d
......@@ -4228,9 +4228,12 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
}
ret = fiemap_fill_next_extent(fieinfo, em_start, disko,
em_len, flags);
if (ret)
if (ret) {
if (ret == 1)
ret = 0;
goto out_free;
}
}
out_free:
free_extent_map(em);
out:
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment