On Fri, Oct 05, 2018 at 05:02:28PM +1000, Dave Chinner wrote: > On Thu, Oct 04, 2018 at 05:44:47PM -0700, Darrick J. Wong wrote: > > From: Darrick J. Wong <[email protected]> > > > > Refactor all the reflink preparation steps into a separate helper that > > we'll use to land all the upcoming fixes for insufficient input checks. > > > > Signed-off-by: Darrick J. Wong <[email protected]> > ..... > > > +xfs_reflink_remap_range( > > + struct file *file_in, > > + loff_t pos_in, > > + struct file *file_out, > > + loff_t pos_out, > > + u64 len, > > + bool is_dedupe) > > +{ > > + struct inode *inode_in = file_inode(file_in); > > + struct xfs_inode *src = XFS_I(inode_in); > > + struct inode *inode_out = file_inode(file_out); > > + struct xfs_inode *dest = XFS_I(inode_out); > > + struct xfs_mount *mp = src->i_mount; > > + xfs_fileoff_t sfsbno, dfsbno; > > + xfs_filblks_t fsblen; > > + xfs_extlen_t cowextsize; > > + ssize_t ret; > > + > > + if (!xfs_sb_version_hasreflink(&mp->m_sb)) > > + return -EOPNOTSUPP; > > + > > + if (XFS_FORCED_SHUTDOWN(mp)) > > + return -EIO; > > + > > + /* Prepare and then clone file data. */ > > + ret = xfs_reflink_remap_prep(file_in, pos_in, file_out, pos_out, > > + len, is_dedupe);
More than one bug. vfs_clone_file_prep_inodes() modifes the length parameter in the case of whole file reflink by way of "len == 0" on a non-zero length file. So I fixed this, too. -Dave. -- Dave Chinner [email protected]
