1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Copyright (c) 2021-2024 Oracle.  All Rights Reserved.
43  * Online repair follows this tactic by creating a root-owned /lost+found
54 	struct xfs_trans	*tp;  in xrep_chown_orphanage()  local
55 	struct xfs_mount	*mp = sc->mp;  in xrep_chown_orphanage()
66 	error = xfs_trans_alloc_ichange(dp, udqp, gdqp, pdqp, true, &tp);  in xrep_chown_orphanage()
76 	inode->i_mode &= ~(S_ISUID | S_ISGID | S_ISVTX);  in xrep_chown_orphanage()
82 	if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID)) {  in xrep_chown_orphanage()
84 			oldu = xfs_qm_vop_chown(tp, dp, &dp->i_udquot, udqp);  in xrep_chown_orphanage()
85 		inode->i_uid = GLOBAL_ROOT_UID;  in xrep_chown_orphanage()
87 	if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID)) {  in xrep_chown_orphanage()
89 			oldg = xfs_qm_vop_chown(tp, dp, &dp->i_gdquot, gdqp);  in xrep_chown_orphanage()
90 		inode->i_gid = GLOBAL_ROOT_GID;  in xrep_chown_orphanage()
92 	if (dp->i_projid != 0) {  in xrep_chown_orphanage()
94 			oldp = xfs_qm_vop_chown(tp, dp, &dp->i_pdquot, pdqp);  in xrep_chown_orphanage()
95 		dp->i_projid = 0;  in xrep_chown_orphanage()
98 	dp->i_diflags &= ~(XFS_DIFLAG_REALTIME | XFS_DIFLAG_RTINHERIT);  in xrep_chown_orphanage()
99 	xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);  in xrep_chown_orphanage()
104 		xfs_trans_set_sync(tp);  in xrep_chown_orphanage()
105 	error = xfs_trans_commit(tp);  in xrep_chown_orphanage()
120 /* Create the orphanage directory, and set sc->orphanage to it. */
125 	struct xfs_mount	*mp = sc->mp;  in xrep_orphanage_create()
127 	struct inode		*root_inode = VFS_I(sc->mp->m_rootip);  in xrep_orphanage_create()
132 		return -EIO;  in xrep_orphanage_create()
134 		sc->orphanage = NULL;  in xrep_orphanage_create()
138 	ASSERT(sc->tp == NULL);  in xrep_orphanage_create()
139 	ASSERT(sc->orphanage == NULL);  in xrep_orphanage_create()
144 		error = -EFSCORRUPTED;  in xrep_orphanage_create()
150 		error = -EFSCORRUPTED;  in xrep_orphanage_create()
165 	 * directory without other-user access because we're live and someone  in xrep_orphanage_create()
178 		error = -ENOTDIR;  in xrep_orphanage_create()
189 		error = -ENOENT;  in xrep_orphanage_create()
199 	sc->orphanage = XFS_I(orphanage_inode);  in xrep_orphanage_create()
200 	sc->orphanage_ilock_flags = 0;  in xrep_orphanage_create()
205 	inode_unlock(VFS_I(sc->mp->m_rootip));  in xrep_orphanage_create()
217 	sc->orphanage_ilock_flags |= ilock_flags;  in xrep_orphanage_ilock()
218 	xfs_ilock(sc->orphanage, ilock_flags);  in xrep_orphanage_ilock()
226 	if (xfs_ilock_nowait(sc->orphanage, ilock_flags)) {  in xrep_orphanage_ilock_nowait()
227 		sc->orphanage_ilock_flags |= ilock_flags;  in xrep_orphanage_ilock_nowait()
239 	xfs_iunlock(sc->orphanage, ilock_flags);  in xrep_orphanage_iunlock()
240 	sc->orphanage_ilock_flags &= ~ilock_flags;  in xrep_orphanage_iunlock()
243 /* Grab the IOLOCK of the orphanage and sc->ip. */
275 	if (!sc->orphanage)  in xrep_orphanage_rele()
278 	if (sc->orphanage_ilock_flags)  in xrep_orphanage_rele()
279 		xfs_iunlock(sc->orphanage, sc->orphanage_ilock_flags);  in xrep_orphanage_rele()
281 	xchk_irele(sc, sc->orphanage);  in xrep_orphanage_rele()
282 	sc->orphanage = NULL;  in xrep_orphanage_rele()
287 /* Can the orphanage adopt @sc->ip? */
292 	ASSERT(sc->ip != NULL);  in xrep_orphanage_can_adopt()
294 	if (!sc->orphanage)  in xrep_orphanage_can_adopt()
296 	if (sc->ip == sc->orphanage)  in xrep_orphanage_can_adopt()
298 	if (xfs_internal_inum(sc->mp, sc->ip->i_ino))  in xrep_orphanage_can_adopt()
307  * adoption, take ILOCK_EXCL of the orphanage and sc->ip, joins them to the
309  * IOLOCK of the orphanage and sc->ip.
316 	struct xfs_mount	*mp = sc->mp;  in xrep_adoption_trans_alloc()
320 	ASSERT(sc->tp == NULL);  in xrep_adoption_trans_alloc()
321 	ASSERT(sc->ip != NULL);  in xrep_adoption_trans_alloc()
322 	ASSERT(sc->orphanage != NULL);  in xrep_adoption_trans_alloc()
323 	ASSERT(sc->ilock_flags & XFS_IOLOCK_EXCL);  in xrep_adoption_trans_alloc()
324 	ASSERT(sc->orphanage_ilock_flags & XFS_IOLOCK_EXCL);  in xrep_adoption_trans_alloc()
325 	ASSERT(!(sc->ilock_flags & (XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)));  in xrep_adoption_trans_alloc()
326 	ASSERT(!(sc->orphanage_ilock_flags &  in xrep_adoption_trans_alloc()
330 	adopt->sc = sc;  in xrep_adoption_trans_alloc()
331 	adopt->orphanage_blkres = xfs_link_space_res(mp, MAXNAMELEN);  in xrep_adoption_trans_alloc()
332 	if (S_ISDIR(VFS_I(sc->ip)->i_mode))  in xrep_adoption_trans_alloc()
337 	adopt->child_blkres = child_blkres;  in xrep_adoption_trans_alloc()
340 	 * Allocate a transaction to link the child into the parent, along with  in xrep_adoption_trans_alloc()
344 	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_link,  in xrep_adoption_trans_alloc()
345 			adopt->orphanage_blkres + adopt->child_blkres, 0, 0,  in xrep_adoption_trans_alloc()
346 			&sc->tp);  in xrep_adoption_trans_alloc()
350 	xfs_lock_two_inodes(sc->orphanage, XFS_ILOCK_EXCL,  in xrep_adoption_trans_alloc()
351 			    sc->ip, XFS_ILOCK_EXCL);  in xrep_adoption_trans_alloc()
352 	sc->ilock_flags |= XFS_ILOCK_EXCL;  in xrep_adoption_trans_alloc()
353 	sc->orphanage_ilock_flags |= XFS_ILOCK_EXCL;  in xrep_adoption_trans_alloc()
355 	xfs_trans_ijoin(sc->tp, sc->orphanage, 0);  in xrep_adoption_trans_alloc()
356 	xfs_trans_ijoin(sc->tp, sc->ip, 0);  in xrep_adoption_trans_alloc()
364 	error = xfs_trans_reserve_quota_nblks(sc->tp, sc->orphanage,  in xrep_adoption_trans_alloc()
365 			adopt->orphanage_blkres, 0, true);  in xrep_adoption_trans_alloc()
374 	if (adopt->child_blkres) {  in xrep_adoption_trans_alloc()
375 		error = xfs_trans_reserve_quota_nblks(sc->tp, sc->ip,  in xrep_adoption_trans_alloc()
376 				adopt->child_blkres, 0, true);  in xrep_adoption_trans_alloc()
391  * orphanage.  Caller must hold ILOCKs of sc->ip and the orphanage and must not
399 	struct xfs_scrub	*sc = adopt->sc;  in xrep_adoption_compute_name()
400 	char			*namebuf = (void *)xname->name;  in xrep_adoption_compute_name()
405 	adopt->xname = xname;  in xrep_adoption_compute_name()
406 	xname->len = snprintf(namebuf, MAXNAMELEN, "%llu", sc->ip->i_ino);  in xrep_adoption_compute_name()
407 	xname->type = xfs_mode_to_ftype(VFS_I(sc->ip)->i_mode);  in xrep_adoption_compute_name()
410 	error = xchk_dir_lookup(sc, sc->orphanage, xname, &ino);  in xrep_adoption_compute_name()
412 		xname->len = snprintf(namebuf, MAXNAMELEN, "%llu.%u",  in xrep_adoption_compute_name()
413 				sc->ip->i_ino, ++incr);  in xrep_adoption_compute_name()
414 		error = xchk_dir_lookup(sc, sc->orphanage, xname, &ino);  in xrep_adoption_compute_name()
418 		return -EFSCORRUPTED;  in xrep_adoption_compute_name()
421 	if (error != -ENOENT)  in xrep_adoption_compute_name()
435 	struct qstr		qname = QSTR_INIT(adopt->xname->name,  in xrep_adoption_check_dcache()
436 						  adopt->xname->len);  in xrep_adoption_check_dcache()
437 	struct xfs_scrub	*sc = adopt->sc;  in xrep_adoption_check_dcache()
441 	d_orphanage = d_find_alias(VFS_I(sc->orphanage));  in xrep_adoption_check_dcache()
447 		trace_xrep_adoption_check_child(sc->mp, d_child);  in xrep_adoption_check_dcache()
451 			error = -EFSCORRUPTED;  in xrep_adoption_check_dcache()
472 	struct qstr		qname = QSTR_INIT(adopt->xname->name,  in xrep_adoption_zap_dcache()
473 						  adopt->xname->len);  in xrep_adoption_zap_dcache()
474 	struct xfs_scrub	*sc = adopt->sc;  in xrep_adoption_zap_dcache()
478 	d_orphanage = d_find_alias(VFS_I(sc->orphanage));  in xrep_adoption_zap_dcache()
484 		trace_xrep_adoption_invalidate_child(sc->mp, d_child);  in xrep_adoption_zap_dcache()
495 	while ((d_child = d_find_alias(VFS_I(sc->ip))) != NULL) {  in xrep_adoption_zap_dcache()
496 		trace_xrep_adoption_invalidate_child(sc->mp, d_child);  in xrep_adoption_zap_dcache()
513 					   adopt->xname->len);  in xrep_adoption_attr_sizeof()
520  * work, such as fixing up unlinked lists or resetting link counts.
526 	struct xfs_scrub	*sc = adopt->sc;  in xrep_adoption_move()
527 	bool			isdir = S_ISDIR(VFS_I(sc->ip)->i_mode);  in xrep_adoption_move()
530 	trace_xrep_adoption_reparent(sc->orphanage, adopt->xname,  in xrep_adoption_move()
531 			sc->ip->i_ino);  in xrep_adoption_move()
542 	if (!xfs_inode_has_attr_fork(sc->ip) && xfs_has_parent(sc->mp)) {  in xrep_adoption_move()
545 		error = xfs_bmap_add_attrfork(sc->tp, sc->ip, sf_size, true);  in xrep_adoption_move()
551 	error = xfs_dir_createname(sc->tp, sc->orphanage, adopt->xname,  in xrep_adoption_move()
552 			sc->ip->i_ino, adopt->orphanage_blkres);  in xrep_adoption_move()
557 	 * Bump the link count of the orphanage if we just added a  in xrep_adoption_move()
560 	xfs_trans_ichgtime(sc->tp, sc->orphanage,  in xrep_adoption_move()
563 		xfs_bumplink(sc->tp, sc->orphanage);  in xrep_adoption_move()
564 	xfs_trans_log_inode(sc->tp, sc->orphanage, XFS_ILOG_CORE);  in xrep_adoption_move()
566 	/* Bump the link count of the child. */  in xrep_adoption_move()
567 	if (adopt->bump_child_nlink) {  in xrep_adoption_move()
568 		xfs_bumplink(sc->tp, sc->ip);  in xrep_adoption_move()
569 		xfs_trans_log_inode(sc->tp, sc->ip, XFS_ILOG_CORE);  in xrep_adoption_move()
574 		error = xfs_dir_replace(sc->tp, sc->ip, &xfs_name_dotdot,  in xrep_adoption_move()
575 				sc->orphanage->i_ino, adopt->child_blkres);  in xrep_adoption_move()
581 	if (xfs_has_parent(sc->mp)) {  in xrep_adoption_move()
582 		error = xfs_parent_addname(sc->tp, &adopt->ppargs,  in xrep_adoption_move()
583 				sc->orphanage, adopt->xname, sc->ip);  in xrep_adoption_move()
593 	xfs_dir_update_hook(sc->orphanage, sc->ip, 1, adopt->xname);  in xrep_adoption_move()
614 	struct xfs_scrub	*sc = adopt->sc;  in xrep_adoption_trans_roll()
617 	trace_xrep_adoption_trans_roll(sc->orphanage, sc->ip,  in xrep_adoption_trans_roll()
618 			!!(sc->tp->t_flags & XFS_TRANS_DIRTY));  in xrep_adoption_trans_roll()
626 	return xfs_trans_roll(&sc->tp);  in xrep_adoption_trans_roll()