1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Copyright (c) 2021-2024 Oracle.  All Rights Reserved.
35  * Live Inode Link Count Repair
38  * Use the live inode link count information that we collected to replace the
39  * nlink values of the incore inodes.  A scrub->repair cycle should have left
40  * the live data and hooks active, so this is safe so long as we make sure the
63 	if (obs->parents != 0)  in xrep_nlinks_is_orphaned()
65 	if (xchk_inode_is_dirtree_root(ip) || ip == sc->orphanage)  in xrep_nlinks_is_orphaned()
78 	pag = xfs_perag_get(sc->mp, XFS_INO_TO_AGNO(sc->mp, sc->ip->i_ino));  in xrep_nlinks_iunlink_remove()
79 	error = xfs_iunlink_remove(sc->tp, pag, sc->ip);  in xrep_nlinks_iunlink_remove()
86  * and resources in a certain order, it's possible that this will be a no-op.
93 	struct xfs_scrub	*sc = xnc->sc;  in xrep_nlinks_repair_inode()
94 	struct xfs_mount	*mp = sc->mp;  in xrep_nlinks_repair_inode()
95 	struct xfs_inode	*ip = sc->ip;  in xrep_nlinks_repair_inode()
104 	 * they're correct for non-directories, and the directory repair code  in xrep_nlinks_repair_inode()
120 		error = xrep_adoption_trans_alloc(sc, &xnc->adoption);  in xrep_nlinks_repair_inode()
137 		error = xfs_trans_alloc(mp, &M_RES(mp)->tr_link, 0, 0, 0,  in xrep_nlinks_repair_inode()
138 				&sc->tp);  in xrep_nlinks_repair_inode()
145 		xfs_trans_ijoin(sc->tp, ip, 0);  in xrep_nlinks_repair_inode()
148 	mutex_lock(&xnc->lock);  in xrep_nlinks_repair_inode()
150 	if (xchk_iscan_aborted(&xnc->collect_iscan)) {  in xrep_nlinks_repair_inode()
151 		error = -ECANCELED;  in xrep_nlinks_repair_inode()
155 	error = xfarray_load_sparse(xnc->nlinks, ip->i_ino, &obs);  in xrep_nlinks_repair_inode()
163 	mutex_unlock(&xnc->lock);  in xrep_nlinks_repair_inode()
166 	actual_nlink = VFS_I(ip)->i_nlink;  in xrep_nlinks_repair_inode()
169 	 * Non-directories cannot have directories pointing up to them.  in xrep_nlinks_repair_inode()
175 	 * store.  This is a never-ending and stupid battle; both tools missed  in xrep_nlinks_repair_inode()
178 	if (!S_ISDIR(VFS_I(ip)->i_mode) && obs.children != 0) {  in xrep_nlinks_repair_inode()
191 		error = xrep_adoption_compute_name(&xnc->adoption, &xnc->xname);  in xrep_nlinks_repair_inode()
200 		error = xrep_adoption_move(&xnc->adoption);  in xrep_nlinks_repair_inode()
205 		 * Re-read the link counts since the reparenting will have  in xrep_nlinks_repair_inode()
208 		mutex_lock(&xnc->lock);  in xrep_nlinks_repair_inode()
209 		error = xfarray_load_sparse(xnc->nlinks, ip->i_ino, &obs);  in xrep_nlinks_repair_inode()
210 		mutex_unlock(&xnc->lock);  in xrep_nlinks_repair_inode()
215 		actual_nlink = VFS_I(ip)->i_nlink;  in xrep_nlinks_repair_inode()
235 		error = xfs_iunlink(sc->tp, ip);  in xrep_nlinks_repair_inode()
255 	xfs_trans_log_inode(sc->tp, ip, XFS_ILOG_CORE);  in xrep_nlinks_repair_inode()
261 	mutex_unlock(&xnc->lock);  in xrep_nlinks_repair_inode()
286 		error = xchk_iscan_iter(&xnc->compare_iscan, ipp);  in xrep_nlinks_iter()
287 	} while (error == -EBUSY);  in xrep_nlinks_iter()
297 	struct xchk_nlink_ctrs	*xnc = sc->buf;  in xrep_nlinks()
308 	if (!xfs_has_ftype(sc->mp))  in xrep_nlinks()
309 		return -EOPNOTSUPP;  in xrep_nlinks()
314 	 * seconds -- even if repair misses a few inodes, we still try to fix  in xrep_nlinks()
317 	xchk_iscan_start(sc, 30000, 100, &xnc->compare_iscan);  in xrep_nlinks()
318 	ASSERT(sc->ip == NULL);  in xrep_nlinks()
320 	while ((error = xrep_nlinks_iter(xnc, &sc->ip)) == 1) {  in xrep_nlinks()
328 		xchk_iscan_mark_visited(&xnc->compare_iscan, sc->ip);  in xrep_nlinks()
329 		xchk_irele(sc, sc->ip);  in xrep_nlinks()
330 		sc->ip = NULL;  in xrep_nlinks()
347 	xchk_iscan_iter_finish(&xnc->compare_iscan);  in xrep_nlinks()
348 	xchk_iscan_teardown(&xnc->compare_iscan);  in xrep_nlinks()