1*edc09b52SDarrick J. Wong /* 2*edc09b52SDarrick J. Wong * Copyright (C) 2017 Oracle. All Rights Reserved. 3*edc09b52SDarrick J. Wong * 4*edc09b52SDarrick J. Wong * Author: Darrick J. Wong <darrick.wong@oracle.com> 5*edc09b52SDarrick J. Wong * 6*edc09b52SDarrick J. Wong * This program is free software; you can redistribute it and/or 7*edc09b52SDarrick J. Wong * modify it under the terms of the GNU General Public License 8*edc09b52SDarrick J. Wong * as published by the Free Software Foundation; either version 2 9*edc09b52SDarrick J. Wong * of the License, or (at your option) any later version. 10*edc09b52SDarrick J. Wong * 11*edc09b52SDarrick J. Wong * This program is distributed in the hope that it would be useful, 12*edc09b52SDarrick J. Wong * but WITHOUT ANY WARRANTY; without even the implied warranty of 13*edc09b52SDarrick J. Wong * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14*edc09b52SDarrick J. Wong * GNU General Public License for more details. 15*edc09b52SDarrick J. Wong * 16*edc09b52SDarrick J. Wong * You should have received a copy of the GNU General Public License 17*edc09b52SDarrick J. Wong * along with this program; if not, write the Free Software Foundation, 18*edc09b52SDarrick J. Wong * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. 19*edc09b52SDarrick J. Wong */ 20*edc09b52SDarrick J. Wong #include "xfs.h" 21*edc09b52SDarrick J. Wong #include "xfs_fs.h" 22*edc09b52SDarrick J. Wong #include "xfs_shared.h" 23*edc09b52SDarrick J. Wong #include "xfs_format.h" 24*edc09b52SDarrick J. Wong #include "xfs_trans_resv.h" 25*edc09b52SDarrick J. Wong #include "xfs_mount.h" 26*edc09b52SDarrick J. Wong #include "xfs_defer.h" 27*edc09b52SDarrick J. Wong #include "xfs_btree.h" 28*edc09b52SDarrick J. Wong #include "xfs_bit.h" 29*edc09b52SDarrick J. Wong #include "xfs_log_format.h" 30*edc09b52SDarrick J. Wong #include "xfs_trans.h" 31*edc09b52SDarrick J. Wong #include "xfs_sb.h" 32*edc09b52SDarrick J. Wong #include "xfs_alloc.h" 33*edc09b52SDarrick J. Wong #include "xfs_rmap.h" 34*edc09b52SDarrick J. Wong #include "scrub/xfs_scrub.h" 35*edc09b52SDarrick J. Wong #include "scrub/scrub.h" 36*edc09b52SDarrick J. Wong #include "scrub/common.h" 37*edc09b52SDarrick J. Wong #include "scrub/btree.h" 38*edc09b52SDarrick J. Wong #include "scrub/trace.h" 39*edc09b52SDarrick J. Wong 40*edc09b52SDarrick J. Wong /* 41*edc09b52SDarrick J. Wong * Set us up to scrub reference count btrees. 42*edc09b52SDarrick J. Wong */ 43*edc09b52SDarrick J. Wong int 44*edc09b52SDarrick J. Wong xfs_scrub_setup_ag_refcountbt( 45*edc09b52SDarrick J. Wong struct xfs_scrub_context *sc, 46*edc09b52SDarrick J. Wong struct xfs_inode *ip) 47*edc09b52SDarrick J. Wong { 48*edc09b52SDarrick J. Wong return xfs_scrub_setup_ag_btree(sc, ip, false); 49*edc09b52SDarrick J. Wong } 50*edc09b52SDarrick J. Wong 51*edc09b52SDarrick J. Wong /* Reference count btree scrubber. */ 52*edc09b52SDarrick J. Wong 53*edc09b52SDarrick J. Wong /* Scrub a refcountbt record. */ 54*edc09b52SDarrick J. Wong STATIC int 55*edc09b52SDarrick J. Wong xfs_scrub_refcountbt_rec( 56*edc09b52SDarrick J. Wong struct xfs_scrub_btree *bs, 57*edc09b52SDarrick J. Wong union xfs_btree_rec *rec) 58*edc09b52SDarrick J. Wong { 59*edc09b52SDarrick J. Wong struct xfs_mount *mp = bs->cur->bc_mp; 60*edc09b52SDarrick J. Wong xfs_agnumber_t agno = bs->cur->bc_private.a.agno; 61*edc09b52SDarrick J. Wong xfs_agblock_t bno; 62*edc09b52SDarrick J. Wong xfs_extlen_t len; 63*edc09b52SDarrick J. Wong xfs_nlink_t refcount; 64*edc09b52SDarrick J. Wong bool has_cowflag; 65*edc09b52SDarrick J. Wong int error = 0; 66*edc09b52SDarrick J. Wong 67*edc09b52SDarrick J. Wong bno = be32_to_cpu(rec->refc.rc_startblock); 68*edc09b52SDarrick J. Wong len = be32_to_cpu(rec->refc.rc_blockcount); 69*edc09b52SDarrick J. Wong refcount = be32_to_cpu(rec->refc.rc_refcount); 70*edc09b52SDarrick J. Wong 71*edc09b52SDarrick J. Wong /* Only CoW records can have refcount == 1. */ 72*edc09b52SDarrick J. Wong has_cowflag = (bno & XFS_REFC_COW_START); 73*edc09b52SDarrick J. Wong if ((refcount == 1 && !has_cowflag) || (refcount != 1 && has_cowflag)) 74*edc09b52SDarrick J. Wong xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); 75*edc09b52SDarrick J. Wong 76*edc09b52SDarrick J. Wong /* Check the extent. */ 77*edc09b52SDarrick J. Wong bno &= ~XFS_REFC_COW_START; 78*edc09b52SDarrick J. Wong if (bno + len <= bno || 79*edc09b52SDarrick J. Wong !xfs_verify_agbno(mp, agno, bno) || 80*edc09b52SDarrick J. Wong !xfs_verify_agbno(mp, agno, bno + len - 1)) 81*edc09b52SDarrick J. Wong xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); 82*edc09b52SDarrick J. Wong 83*edc09b52SDarrick J. Wong if (refcount == 0) 84*edc09b52SDarrick J. Wong xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); 85*edc09b52SDarrick J. Wong 86*edc09b52SDarrick J. Wong return error; 87*edc09b52SDarrick J. Wong } 88*edc09b52SDarrick J. Wong 89*edc09b52SDarrick J. Wong /* Scrub the refcount btree for some AG. */ 90*edc09b52SDarrick J. Wong int 91*edc09b52SDarrick J. Wong xfs_scrub_refcountbt( 92*edc09b52SDarrick J. Wong struct xfs_scrub_context *sc) 93*edc09b52SDarrick J. Wong { 94*edc09b52SDarrick J. Wong struct xfs_owner_info oinfo; 95*edc09b52SDarrick J. Wong 96*edc09b52SDarrick J. Wong xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_REFC); 97*edc09b52SDarrick J. Wong return xfs_scrub_btree(sc, sc->sa.refc_cur, xfs_scrub_refcountbt_rec, 98*edc09b52SDarrick J. Wong &oinfo, NULL); 99*edc09b52SDarrick J. Wong } 100