1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Copyright (C) 2017-2023 Oracle.  All Rights Reserved.
70 	if (!xfs_dir2_namecheck(name->name, name->len))  in xchk_parent_actor()
71 		error = -EFSCORRUPTED;  in xchk_parent_actor()
75 	if (sc->ip->i_ino == ino)  in xchk_parent_actor()
76 		spc->nlink++;  in xchk_parent_actor()
78 	if (xchk_should_terminate(spc->sc, &error))  in xchk_parent_actor()
95 	if (!xfs_need_iread_extents(&dp->i_df))  in xchk_parent_ilock_dir()
109  * back to the inode being scrubbed.  Returns -EAGAIN if we need to revalidate
121 	struct xfs_mount	*mp = sc->mp;  in xchk_parent_validate()
128 	if (sc->ip == mp->m_rootip) {  in xchk_parent_validate()
129 		if (sc->ip->i_ino != mp->m_sb.sb_rootino ||  in xchk_parent_validate()
130 		    sc->ip->i_ino != parent_ino)  in xchk_parent_validate()
136 	if (sc->ip == mp->m_metadirip) {  in xchk_parent_validate()
137 		if (sc->ip->i_ino != mp->m_sb.sb_metadirino ||  in xchk_parent_validate()
138 		    sc->ip->i_ino != parent_ino)  in xchk_parent_validate()
144 	if (sc->ip->i_ino == parent_ino) {  in xchk_parent_validate()
153 	expected_nlink = VFS_I(sc->ip)->i_nlink == 0 ? 0 : 1;  in xchk_parent_validate()
159 	 * If _iget returns -EINVAL or -ENOENT then the parent inode number is  in xchk_parent_validate()
161 	 * -EFSCORRUPTED or -EFSBADCRC then the parent is corrupt which is a  in xchk_parent_validate()
165 	if (error == -EINVAL || error == -ENOENT) {  in xchk_parent_validate()
166 		error = -EFSCORRUPTED;  in xchk_parent_validate()
172 	if (dp == sc->ip || xrep_is_tempfile(dp) ||  in xchk_parent_validate()
173 	    !S_ISDIR(VFS_I(dp)->i_mode)) {  in xchk_parent_validate()
182 		error = -EAGAIN;  in xchk_parent_validate()
191 		error = -EBUSY;  in xchk_parent_validate()
197 	if (xfs_is_metadir_inode(dp) != xfs_is_metadir_inode(sc->ip)) {  in xchk_parent_validate()
252 	/* Fixed-size array of xchk_pptr structures. */
288 	error = xfs_parent_from_attr(sc->mp, attr_flags, name, namelen, value,  in xchk_parent_scan_dotdot()
293 	if (pp->parent_ino == parent_ino)  in xchk_parent_scan_dotdot()
294 		return -ECANCELED;  in xchk_parent_scan_dotdot()
304 	struct xfs_scrub	*sc = pp->sc;  in xchk_parent_pptr_and_dotdot()
308 	error = xchk_dir_lookup(sc, sc->ip, &xfs_name_dotdot, &pp->parent_ino);  in xchk_parent_pptr_and_dotdot()
311 	if (!xfs_verify_dir_ino(sc->mp, pp->parent_ino)) {  in xchk_parent_pptr_and_dotdot()
317 	if (xchk_inode_is_dirtree_root(sc->ip)) {  in xchk_parent_pptr_and_dotdot()
318 		if (sc->ip->i_ino != pp->parent_ino)  in xchk_parent_pptr_and_dotdot()
327 	if (VFS_I(sc->ip)->i_nlink == 0)  in xchk_parent_pptr_and_dotdot()
330 	if (pp->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)  in xchk_parent_pptr_and_dotdot()
334 	error = xchk_xattr_walk(sc, sc->ip, xchk_parent_scan_dotdot, NULL, pp);  in xchk_parent_pptr_and_dotdot()
335 	if (error == -ECANCELED) {  in xchk_parent_pptr_and_dotdot()
339 	if (!error || error == -EFSCORRUPTED) {  in xchk_parent_pptr_and_dotdot()
364 	if (!xfs_need_iread_extents(&dp->i_df))  in xchk_parent_lock_dir()
384 	struct xfs_scrub	*sc = pp->sc;  in xchk_parent_dirent()
393 	if (error == -ENOENT) {  in xchk_parent_dirent()
401 	if (child_ino != sc->ip->i_ino) {  in xchk_parent_dirent()
416 	struct xfs_scrub	*sc = pp->sc;  in xchk_parent_iget()
418 	xfs_ino_t		parent_ino = be64_to_cpu(pptr->p_ino);  in xchk_parent_iget()
422 	error = xfs_dir_ino_validate(sc->mp, parent_ino);  in xchk_parent_iget()
425 		return -ECANCELED;  in xchk_parent_iget()
429 	if (error == -EINVAL || error == -ENOENT) {  in xchk_parent_iget()
431 		return -ECANCELED;  in xchk_parent_iget()
437 	if (!S_ISDIR(VFS_I(ip)->i_mode)) {  in xchk_parent_iget()
443 	if (VFS_I(ip)->i_generation != be32_to_cpu(pptr->p_gen)) {  in xchk_parent_iget()
485 	error = xfs_parent_from_attr(sc->mp, attr_flags, name, namelen, value,  in xchk_parent_scan_attr()
492 	/* No self-referential parent pointers. */  in xchk_parent_scan_attr()
493 	if (parent_ino == sc->ip->i_ino) {  in xchk_parent_scan_attr()
495 		return -ECANCELED;  in xchk_parent_scan_attr()
498 	pp->pptrs_found++;  in xchk_parent_scan_attr()
515 		trace_xchk_parent_defer(sc->ip, &xname, dp->i_ino);  in xchk_parent_scan_attr()
517 		error = xfblob_storename(pp->pptr_names, &save_pp.name_cookie,  in xchk_parent_scan_attr()
523 		error = xfarray_append(pp->pptr_entries, &save_pp);  in xchk_parent_scan_attr()
545  * -ENOENT if it has gone away on us, or a negative errno.
553 	struct xfs_scrub		*sc = pp->sc;  in xchk_parent_revalidate_pptr()
556 	error = xfs_parent_lookup(sc->tp, sc->ip, xname, pptr, &pp->pptr_args);  in xchk_parent_revalidate_pptr()
557 	if (error == -ENOATTR) {  in xchk_parent_revalidate_pptr()
559 		return -ENOENT;  in xchk_parent_revalidate_pptr()
567  * and put up with revalidation until we get it done.
575 	struct xfs_scrub	*sc = pp->sc;  in xchk_parent_slow_pptr()
581 	if (pp->need_revalidate) {  in xchk_parent_slow_pptr()
583 		if (error == -ENOENT)  in xchk_parent_slow_pptr()
602 		trace_xchk_parent_slowpath(sc->ip, xname, dp->i_ino);  in xchk_parent_slow_pptr()
610 	xchk_iunlock(sc, sc->ilock_flags);  in xchk_parent_slow_pptr()
611 	pp->need_revalidate = true;  in xchk_parent_slow_pptr()
613 	trace_xchk_parent_ultraslowpath(sc->ip, xname, dp->i_ino);  in xchk_parent_slow_pptr()
621 	if (error == -ENOENT) {  in xchk_parent_slow_pptr()
645 	foreach_xfarray_idx(pp->pptr_entries, array_cur) {  in xchk_parent_finish_slow_pptrs()
648 		if (pp->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)  in xchk_parent_finish_slow_pptrs()
651 		error = xfarray_load(pp->pptr_entries, array_cur, &pptr);  in xchk_parent_finish_slow_pptrs()
655 		error = xfblob_loadname(pp->pptr_names, pptr.name_cookie,  in xchk_parent_finish_slow_pptrs()
656 				&pp->xname, pptr.namelen);  in xchk_parent_finish_slow_pptrs()
660 		error = xchk_parent_slow_pptr(pp, &pp->xname, &pptr.pptr_rec);  in xchk_parent_finish_slow_pptrs()
666 	xfarray_truncate(pp->pptr_entries);  in xchk_parent_finish_slow_pptrs()
667 	xfblob_truncate(pp->pptr_names);  in xchk_parent_finish_slow_pptrs()
689 	error = xfs_parent_from_attr(sc->mp, attr_flags, name, namelen, value,  in xchk_parent_count_pptr()
694 	pp->pptrs_found++;  in xchk_parent_count_pptr()
700  * non-directories these should be the same.  For unlinked directories the
707 	struct xfs_scrub	*sc = pp->sc;  in xchk_parent_count_pptrs()
711 	 * If we cycled the ILOCK while cross-checking parent pointers with  in xchk_parent_count_pptrs()
714 	if (pp->need_revalidate) {  in xchk_parent_count_pptrs()
715 		pp->pptrs_found = 0;  in xchk_parent_count_pptrs()
716 		error = xchk_xattr_walk(sc, sc->ip, xchk_parent_count_pptr,  in xchk_parent_count_pptrs()
718 		if (error == -EFSCORRUPTED) {  in xchk_parent_count_pptrs()
727 	if (S_ISDIR(VFS_I(sc->ip)->i_mode)) {  in xchk_parent_count_pptrs()
728 		if (xchk_inode_is_dirtree_root(sc->ip))  in xchk_parent_count_pptrs()
729 			pp->pptrs_found++;  in xchk_parent_count_pptrs()
731 		if (VFS_I(sc->ip)->i_nlink == 0 && pp->pptrs_found > 0)  in xchk_parent_count_pptrs()
732 			xchk_ino_set_corrupt(sc, sc->ip->i_ino);  in xchk_parent_count_pptrs()
733 		else if (VFS_I(sc->ip)->i_nlink > 0 &&  in xchk_parent_count_pptrs()
734 			 pp->pptrs_found == 0)  in xchk_parent_count_pptrs()
735 			xchk_ino_set_corrupt(sc, sc->ip->i_ino);  in xchk_parent_count_pptrs()
739 		 * of non-directory files that are children of the superblock.  in xchk_parent_count_pptrs()
742 		if (xfs_has_metadir(sc->mp) && xchk_inode_is_sb_rooted(sc->ip))  in xchk_parent_count_pptrs()
743 			pp->pptrs_found++;  in xchk_parent_count_pptrs()
745 		if (VFS_I(sc->ip)->i_nlink != pp->pptrs_found)  in xchk_parent_count_pptrs()
746 			xchk_ino_set_corrupt(sc, sc->ip->i_ino);  in xchk_parent_count_pptrs()
763 		return -ENOMEM;  in xchk_parent_pptr()
764 	pp->sc = sc;  in xchk_parent_pptr()
765 	pp->xname.name = pp->namebuf;  in xchk_parent_pptr()
773 			&pp->pptr_entries);  in xchk_parent_pptr()
779 	error = xfblob_create(descr, &pp->pptr_names);  in xchk_parent_pptr()
784 	error = xchk_xattr_walk(sc, sc->ip, xchk_parent_scan_attr, NULL, pp);  in xchk_parent_pptr()
785 	if (error == -ECANCELED) {  in xchk_parent_pptr()
793 	if (error == -ETIMEDOUT) {  in xchk_parent_pptr()
801 	if (pp->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)  in xchk_parent_pptr()
817 	if (S_ISDIR(VFS_I(sc->ip)->i_mode)) {  in xchk_parent_pptr()
823 	if (pp->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)  in xchk_parent_pptr()
836 	xfblob_destroy(pp->pptr_names);  in xchk_parent_pptr()
838 	xfarray_destroy(pp->pptr_entries);  in xchk_parent_pptr()
849 	struct xfs_mount	*mp = sc->mp;  in xchk_parent()
860 	if (!S_ISDIR(VFS_I(sc->ip)->i_mode))  in xchk_parent()
861 		return -ENOENT;  in xchk_parent()
864 	if (!xfs_verify_dir_ino(mp, sc->ip->i_ino)) {  in xchk_parent()
874 		error = xchk_dir_lookup(sc, sc->ip, &xfs_name_dotdot,  in xchk_parent()
888 	} while (error == -EAGAIN);  in xchk_parent()
889 	if (error == -EBUSY) {  in xchk_parent()
912 	ASSERT(xfs_has_parent(ip->i_mount));  in xchk_pptr_looks_zapped()
918 	if (inode->i_nlink == 0 && !(inode->i_state & I_LINKABLE))  in xchk_pptr_looks_zapped()
938 	 * Linked and linkable non-rootdir files should always have an  in xchk_pptr_looks_zapped()
952 	 * scrubber to reconstruct the block mappings.  The extended attribute  in xchk_pptr_looks_zapped()
956 	return ip->i_af.if_format == XFS_DINODE_FMT_EXTENTS &&  in xchk_pptr_looks_zapped()
957 	       ip->i_af.if_nextents == 0;  in xchk_pptr_looks_zapped()