1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Copyright (c) 2023-2024 Oracle.  All Rights Reserved.
39  * metadata, this scrubber ensures that the ondisk metadir path points to the
80 	if (mpath->dp_ilock_flags)  in xchk_metapath_cleanup()
81 		xfs_iunlock(mpath->dp, mpath->dp_ilock_flags);  in xchk_metapath_cleanup()
82 	kfree_const(mpath->path);  in xchk_metapath_cleanup()
97 		return -ENOMEM;  in xchk_setup_metapath_scan()
108 		return -ENOMEM;  in xchk_setup_metapath_scan()
111 	mpath->sc = sc;  in xchk_setup_metapath_scan()
112 	sc->buf = mpath;  in xchk_setup_metapath_scan()
113 	sc->buf_cleanup = xchk_metapath_cleanup;  in xchk_setup_metapath_scan()
115 	mpath->dp = dp;  in xchk_setup_metapath_scan()
116 	mpath->path = path; /* path is now owned by mpath */  in xchk_setup_metapath_scan()
118 	mpath->xname.name = mpath->path;  in xchk_setup_metapath_scan()
119 	mpath->xname.len = strlen(mpath->path);  in xchk_setup_metapath_scan()
120 	mpath->xname.type = xfs_mode_to_ftype(VFS_I(ip)->i_mode);  in xchk_setup_metapath_scan()
131 	if (!sc->mp->m_rtdirip)  in xchk_setup_metapath_rtdir()
132 		return -ENOENT;  in xchk_setup_metapath_rtdir()
134 	return xchk_setup_metapath_scan(sc, sc->mp->m_metadirip,  in xchk_setup_metapath_rtdir()
135 			kstrdup_const("rtgroups", GFP_KERNEL), sc->mp->m_rtdirip);  in xchk_setup_metapath_rtdir()
148 	rtg = xfs_rtgroup_get(sc->mp, sc->sm->sm_agno);  in xchk_setup_metapath_rtginode()
150 		return -ENOENT;  in xchk_setup_metapath_rtginode()
152 	ip = rtg->rtg_inodes[type];  in xchk_setup_metapath_rtginode()
154 		error = -ENOENT;  in xchk_setup_metapath_rtginode()
158 	error = xchk_setup_metapath_scan(sc, sc->mp->m_rtdirip,  in xchk_setup_metapath_rtginode()
166 # define xchk_setup_metapath_rtdir(...)		(-ENOENT)
167 # define xchk_setup_metapath_rtginode(...)	(-ENOENT)
176 	struct xfs_quotainfo	*qi = sc->mp->m_quotainfo;  in xchk_setup_metapath_quotadir()
178 	if (!qi || !qi->qi_dirip)  in xchk_setup_metapath_quotadir()
179 		return -ENOENT;  in xchk_setup_metapath_quotadir()
181 	return xchk_setup_metapath_scan(sc, sc->mp->m_metadirip,  in xchk_setup_metapath_quotadir()
182 			kstrdup_const("quota", GFP_KERNEL), qi->qi_dirip);  in xchk_setup_metapath_quotadir()
191 	struct xfs_quotainfo	*qi = sc->mp->m_quotainfo;  in xchk_setup_metapath_dqinode()
195 		return -ENOENT;  in xchk_setup_metapath_dqinode()
199 		ip = qi->qi_uquotaip;  in xchk_setup_metapath_dqinode()
202 		ip = qi->qi_gquotaip;  in xchk_setup_metapath_dqinode()
205 		ip = qi->qi_pquotaip;  in xchk_setup_metapath_dqinode()
209 		return -EINVAL;  in xchk_setup_metapath_dqinode()
212 		return -ENOENT;  in xchk_setup_metapath_dqinode()
214 	return xchk_setup_metapath_scan(sc, qi->qi_dirip,  in xchk_setup_metapath_dqinode()
218 # define xchk_setup_metapath_quotadir(...)	(-ENOENT)
219 # define xchk_setup_metapath_dqinode(...)	(-ENOENT)
226 	if (!xfs_has_metadir(sc->mp))  in xchk_setup_metapath()
227 		return -ENOENT;  in xchk_setup_metapath()
228 	if (sc->sm->sm_gen)  in xchk_setup_metapath()
229 		return -EINVAL;  in xchk_setup_metapath()
231 	switch (sc->sm->sm_ino) {  in xchk_setup_metapath()
234 		if (sc->sm->sm_agno)  in xchk_setup_metapath()
235 			return -EINVAL;  in xchk_setup_metapath()
256 		return -ENOENT;  in xchk_setup_metapath()
263  * to lock the child.  Returns 0 if successful, or -EINTR to abort the scrub.
269 	struct xfs_scrub	*sc = mpath->sc;  in xchk_metapath_ilock_both()
273 		xfs_ilock(mpath->dp, XFS_ILOCK_EXCL);  in xchk_metapath_ilock_both()
275 			mpath->dp_ilock_flags |= XFS_ILOCK_EXCL;  in xchk_metapath_ilock_both()
278 		xfs_iunlock(mpath->dp, XFS_ILOCK_EXCL);  in xchk_metapath_ilock_both()
287 	return -EINTR;  in xchk_metapath_ilock_both()
295 	struct xfs_scrub	*sc = mpath->sc;  in xchk_metapath_iunlock()
299 	mpath->dp_ilock_flags &= ~XFS_ILOCK_EXCL;  in xchk_metapath_iunlock()
300 	xfs_iunlock(mpath->dp, XFS_ILOCK_EXCL);  in xchk_metapath_iunlock()
307 	struct xchk_metapath	*mpath = sc->buf;  in xchk_metapath()
312 	if (sc->sm->sm_ino == XFS_SCRUB_METAPATH_PROBE)  in xchk_metapath()
316 	if (mpath->dp == NULL) {  in xchk_metapath()
317 		xchk_ino_set_corrupt(sc, sc->ip->i_ino);  in xchk_metapath()
328 	error = xchk_dir_lookup(sc, mpath->dp, &mpath->xname, &ino);  in xchk_metapath()
329 	trace_xchk_metapath_lookup(sc, mpath->path, mpath->dp, ino);  in xchk_metapath()
330 	if (error == -ENOENT) {  in xchk_metapath()
332 		xchk_ino_set_corrupt(sc, sc->ip->i_ino);  in xchk_metapath()
338 	if (ino != sc->ip->i_ino) {  in xchk_metapath()
340 		xchk_ino_set_corrupt(sc, sc->ip->i_ino);  in xchk_metapath()
356 	struct xfs_scrub	*sc = mpath->sc;  in xrep_metapath_link()
358 	mpath->du.dp = mpath->dp;  in xrep_metapath_link()
359 	mpath->du.name = &mpath->xname;  in xrep_metapath_link()
360 	mpath->du.ip = sc->ip;  in xrep_metapath_link()
362 	if (xfs_has_parent(sc->mp))  in xrep_metapath_link()
363 		mpath->du.ppargs = &mpath->link_ppargs;  in xrep_metapath_link()
365 		mpath->du.ppargs = NULL;  in xrep_metapath_link()
367 	trace_xrep_metapath_link(sc, mpath->path, mpath->dp, sc->ip->i_ino);  in xrep_metapath_link()
369 	return xfs_dir_add_child(sc->tp, mpath->link_resblks, &mpath->du);  in xrep_metapath_link()
380 	struct xfs_scrub	*sc = mpath->sc;  in xrep_metapath_unlink()
381 	struct xfs_mount	*mp = sc->mp;  in xrep_metapath_unlink()
384 	trace_xrep_metapath_unlink(sc, mpath->path, mpath->dp, ino);  in xrep_metapath_unlink()
388 		xfs_trans_log_inode(sc->tp, mpath->dp, XFS_ILOG_CORE);  in xrep_metapath_unlink()
389 		return xfs_dir_removename(sc->tp, mpath->dp, &mpath->xname,  in xrep_metapath_unlink()
390 				ino, mpath->unlink_resblks);  in xrep_metapath_unlink()
393 	mpath->du.dp = mpath->dp;  in xrep_metapath_unlink()
394 	mpath->du.name = &mpath->xname;  in xrep_metapath_unlink()
395 	mpath->du.ip = ip;  in xrep_metapath_unlink()
396 	mpath->du.ppargs = NULL;  in xrep_metapath_unlink()
401 		error = xfs_parent_lookup(sc->tp, ip, &mpath->xname, &rec,  in xrep_metapath_unlink()
402 				&mpath->pptr_args);  in xrep_metapath_unlink()
404 		case -ENOATTR:  in xrep_metapath_unlink()
407 			mpath->du.ppargs = &mpath->unlink_ppargs;  in xrep_metapath_unlink()
414 	return xfs_dir_remove_child(sc->tp, mpath->unlink_resblks, &mpath->du);  in xrep_metapath_unlink()
418  * Try to create a dirent in @mpath->dp with the name @mpath->xname that points
419  * to @sc->ip.  Returns:
421  * -EEXIST and an @alleged_child if the dirent that points to the wrong inode;
422  * 0 if there is now a dirent pointing to @sc->ip; or
430 	struct xfs_scrub	*sc = mpath->sc;  in xrep_metapath_try_link()
435 	error = xchk_trans_alloc(sc, mpath->link_resblks);  in xrep_metapath_try_link()
444 	xfs_trans_ijoin(sc->tp, mpath->dp, 0);  in xrep_metapath_try_link()
445 	xfs_trans_ijoin(sc->tp, sc->ip, 0);  in xrep_metapath_try_link()
447 	error = xchk_dir_lookup(sc, mpath->dp, &mpath->xname, &ino);  in xrep_metapath_try_link()
448 	trace_xrep_metapath_lookup(sc, mpath->path, mpath->dp, ino);  in xrep_metapath_try_link()
449 	if (error == -ENOENT) {  in xrep_metapath_try_link()
452 		 * pointing to @sc->ip.  in xrep_metapath_try_link()
465 	if (ino == sc->ip->i_ino) {  in xrep_metapath_try_link()
466 		/* The dirent already points to @sc->ip; we're done. */  in xrep_metapath_try_link()
476 	error = -EEXIST;  in xrep_metapath_try_link()
488  * -EINTR to abort the repair.  The lock state of @dp is not recorded in @mpath.
495 	struct xfs_scrub	*sc = mpath->sc;  in xchk_metapath_ilock_parent_and_child()
499 		xfs_ilock(mpath->dp, XFS_ILOCK_EXCL);  in xchk_metapath_ilock_parent_and_child()
502 		xfs_iunlock(mpath->dp, XFS_ILOCK_EXCL);  in xchk_metapath_ilock_parent_and_child()
511 	return -EINTR;  in xchk_metapath_ilock_parent_and_child()
515  * Try to remove a dirent in @mpath->dp with the name @mpath->xname that points
519  * -EEXIST if the dirent points to @sc->ip;
520  * -EAGAIN and an updated @alleged_child if the dirent points elsewhere; or
528 	struct xfs_scrub	*sc = mpath->sc;  in xrep_metapath_try_unlink()
533 	ASSERT(*alleged_child != sc->ip->i_ino);  in xrep_metapath_try_unlink()
535 	trace_xrep_metapath_try_unlink(sc, mpath->path, mpath->dp,  in xrep_metapath_try_unlink()
542 	error = xchk_trans_alloc(sc, mpath->unlink_resblks);  in xrep_metapath_try_unlink()
547 	if (error == -EINVAL || error == -ENOENT) {  in xrep_metapath_try_unlink()
561 	xfs_trans_ijoin(sc->tp, mpath->dp, 0);  in xrep_metapath_try_unlink()
563 		xfs_trans_ijoin(sc->tp, ip, 0);  in xrep_metapath_try_unlink()
565 	error = xchk_dir_lookup(sc, mpath->dp, &mpath->xname, &ino);  in xrep_metapath_try_unlink()
566 	trace_xrep_metapath_lookup(sc, mpath->path, mpath->dp, ino);  in xrep_metapath_try_unlink()
567 	if (error == -ENOENT) {  in xrep_metapath_try_unlink()
578 	if (ino == sc->ip->i_ino) {  in xrep_metapath_try_unlink()
579 		/* The dirent already points to @sc->ip; we're done. */  in xrep_metapath_try_unlink()
580 		error = -EEXIST;  in xrep_metapath_try_unlink()
590 		error = -EAGAIN;  in xrep_metapath_try_unlink()
605 	xfs_iunlock(mpath->dp, XFS_ILOCK_EXCL);  in xrep_metapath_try_unlink()
624 	struct xchk_metapath	*mpath = sc->buf;  in xrep_metapath()
625 	struct xfs_mount	*mp = sc->mp;  in xrep_metapath()
629 	if (sc->sm->sm_ino == XFS_SCRUB_METAPATH_PROBE)  in xrep_metapath()
633 	if (mpath->dp == NULL)  in xrep_metapath()
634 		return -EFSCORRUPTED;  in xrep_metapath()
641 		error = xfs_attr_add_fork(sc->ip,  in xrep_metapath()
648 	mpath->unlink_resblks = xfs_remove_space_res(mp, MAXNAMELEN);  in xrep_metapath()
649 	mpath->link_resblks = xfs_link_space_res(mp, MAXNAMELEN);  in xrep_metapath()
654 		/* Re-establish the link, or tell us which inode to remove. */  in xrep_metapath()
658 		if (error != -EEXIST)  in xrep_metapath()
667 		} while (error == -EAGAIN);  in xrep_metapath()
668 		if (error == -EEXIST) {  in xrep_metapath()
669 			/* Link established; we're done. */  in xrep_metapath()