| Message ID | 4E549679.3010807@cn.fujitsu.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 970977a..660a6c8 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -2220,6 +2220,12 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, !IS_ALIGNED(destoff, bs)) goto out_unlock; + if (destoff > inode->i_size) { + ret = btrfs_cont_expand(inode, inode->i_size, destoff); + if (ret) + goto out_unlock; + } + /* do any pending delalloc/csum calc on src, one way or another, and lock file content */ while (1) {
# touch /mnt/dst # clone_range -d 4096 /mnt/src /mnt/dst # umount /mnt # btrfs-debug-tree /dev/sda7 ... item 10 key (258 INODE_REF 256) itemoff 3283 itemsize 13 inode ref index 3 namelen 3 name: tmp item 11 key (258 EXTENT_DATA 4096) itemoff 3230 itemsize 53 extent data disk byte 12632064 nr 49152 extent data offset 0 nr 49152 ram 49152 extent compression 0 You can see there's no file extent with range [0, 4096]. Check this by btrfsck: # btrfsck /dev/sda7 root 5 inode 258 errors 100 ... Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> --- fs/btrfs/ioctl.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)