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btrfs: use btrfs_ordered_update_i_size in clone_finish_inode_update 

We were using btrfs_i_size_write(), which unconditionally jacks up
inode->disk_i_size.  However since clone can operate on ranges we could
have pending ordered extents for a range prior to the start of our clone
operation and thus increase disk_i_size too far and have a hole with no
file extent.

Fix this by using the btrfs_ordered_update_i_size helper which will do
the right thing in the face of pending ordered extents outside of our
clone range.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2020-01-17 09:02:19 -05:00 committed by David Sterba
parent cfe953c824
commit 790a1d44f9
1 changed files with 4 additions and 2 deletions
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6
fs/btrfs/ioctl.c
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@ -3321,8 +3321,10 @@ static int clone_finish_inode_update(struct btrfs_trans_handle *trans,
*/
if (endoff > destoff + olen)
endoff = destoff + olen;
if (endoff > inode->i_size)
btrfs_i_size_write(BTRFS_I(inode), endoff);
if (endoff > inode->i_size) {
i_size_write(inode, endoff);
btrfs_ordered_update_i_size(inode, endoff, NULL);
}
ret = btrfs_update_inode(trans, root, inode);
if (ret) {