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authorLi Zefan <lizf@cn.fujitsu.com>2011-09-11 10:52:25 -0400
committerChris Mason <chris.mason@oracle.com>2011-09-11 10:52:25 -0400
commitd525e8ab022cb000e6e31a515ba8c3cf0d9c6130 (patch)
treeafaa93134ca050e1169ed8fe68442b4522d9112e
parentd72c0842ff0e71342857723bb65f35b71f57b264 (diff)
Btrfs: add dummy extent if dst offset excceeds file end in
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> Signed-off-by: Chris Mason <chris.mason@oracle.com>
-rw-r--r--fs/btrfs/ioctl.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 028a4b8c12cd..63b4de1626d2 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2228,6 +2228,12 @@ 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) {