1 /* 2 * Copyright (C) 2017 Oracle. All Rights Reserved. 3 * 4 * Author: Darrick J. Wong <darrick.wong@oracle.com> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 2 9 * of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it would be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. 19 */ 20 #include "xfs.h" 21 #include "xfs_fs.h" 22 #include "xfs_shared.h" 23 #include "xfs_format.h" 24 #include "xfs_trans_resv.h" 25 #include "xfs_mount.h" 26 #include "xfs_defer.h" 27 #include "xfs_btree.h" 28 #include "xfs_bit.h" 29 #include "xfs_log_format.h" 30 #include "xfs_trans.h" 31 #include "xfs_sb.h" 32 #include "xfs_alloc.h" 33 #include "xfs_rmap.h" 34 #include "scrub/xfs_scrub.h" 35 #include "scrub/scrub.h" 36 #include "scrub/common.h" 37 #include "scrub/btree.h" 38 #include "scrub/trace.h" 39 40 /* 41 * Set us up to scrub free space btrees. 42 */ 43 int 44 xfs_scrub_setup_ag_allocbt( 45 struct xfs_scrub_context *sc, 46 struct xfs_inode *ip) 47 { 48 return xfs_scrub_setup_ag_btree(sc, ip, false); 49 } 50 51 /* Free space btree scrubber. */ 52 53 /* Scrub a bnobt/cntbt record. */ 54 STATIC int 55 xfs_scrub_allocbt_rec( 56 struct xfs_scrub_btree *bs, 57 union xfs_btree_rec *rec) 58 { 59 struct xfs_mount *mp = bs->cur->bc_mp; 60 xfs_agnumber_t agno = bs->cur->bc_private.a.agno; 61 xfs_agblock_t bno; 62 xfs_extlen_t len; 63 int error = 0; 64 65 bno = be32_to_cpu(rec->alloc.ar_startblock); 66 len = be32_to_cpu(rec->alloc.ar_blockcount); 67 68 if (bno + len <= bno || 69 !xfs_verify_agbno(mp, agno, bno) || 70 !xfs_verify_agbno(mp, agno, bno + len - 1)) 71 xfs_scrub_btree_set_corrupt(bs->sc, bs->cur, 0); 72 73 return error; 74 } 75 76 /* Scrub the freespace btrees for some AG. */ 77 STATIC int 78 xfs_scrub_allocbt( 79 struct xfs_scrub_context *sc, 80 xfs_btnum_t which) 81 { 82 struct xfs_owner_info oinfo; 83 struct xfs_btree_cur *cur; 84 85 xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_AG); 86 cur = which == XFS_BTNUM_BNO ? sc->sa.bno_cur : sc->sa.cnt_cur; 87 return xfs_scrub_btree(sc, cur, xfs_scrub_allocbt_rec, &oinfo, NULL); 88 } 89 90 int 91 xfs_scrub_bnobt( 92 struct xfs_scrub_context *sc) 93 { 94 return xfs_scrub_allocbt(sc, XFS_BTNUM_BNO); 95 } 96 97 int 98 xfs_scrub_cntbt( 99 struct xfs_scrub_context *sc) 100 { 101 return xfs_scrub_allocbt(sc, XFS_BTNUM_CNT); 102 } 103