1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2017 Oracle. All Rights Reserved. 4 * Author: Darrick J. Wong <darrick.wong@oracle.com> 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_trans_resv.h" 11 #include "xfs_mount.h" 12 #include "xfs_log_format.h" 13 #include "xfs_trans.h" 14 #include "xfs_rtalloc.h" 15 #include "xfs_inode.h" 16 #include "scrub/scrub.h" 17 #include "scrub/common.h" 18 19 /* Set us up with the realtime metadata locked. */ 20 int 21 xchk_setup_rt( 22 struct xfs_scrub *sc, 23 struct xfs_inode *ip) 24 { 25 int error; 26 27 error = xchk_setup_fs(sc, ip); 28 if (error) 29 return error; 30 31 sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTBITMAP; 32 sc->ip = sc->mp->m_rbmip; 33 xfs_ilock(sc->ip, sc->ilock_flags); 34 35 return 0; 36 } 37 38 /* Realtime bitmap. */ 39 40 /* Scrub a free extent record from the realtime bitmap. */ 41 STATIC int 42 xchk_rtbitmap_rec( 43 struct xfs_trans *tp, 44 struct xfs_rtalloc_rec *rec, 45 void *priv) 46 { 47 struct xfs_scrub *sc = priv; 48 xfs_rtblock_t startblock; 49 xfs_rtblock_t blockcount; 50 51 startblock = rec->ar_startext * tp->t_mountp->m_sb.sb_rextsize; 52 blockcount = rec->ar_extcount * tp->t_mountp->m_sb.sb_rextsize; 53 54 if (startblock + blockcount <= startblock || 55 !xfs_verify_rtbno(sc->mp, startblock) || 56 !xfs_verify_rtbno(sc->mp, startblock + blockcount - 1)) 57 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0); 58 return 0; 59 } 60 61 /* Scrub the realtime bitmap. */ 62 int 63 xchk_rtbitmap( 64 struct xfs_scrub *sc) 65 { 66 int error; 67 68 /* Invoke the fork scrubber. */ 69 error = xchk_metadata_inode_forks(sc); 70 if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)) 71 return error; 72 73 error = xfs_rtalloc_query_all(sc->tp, xchk_rtbitmap_rec, sc); 74 if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, 0, &error)) 75 goto out; 76 77 out: 78 return error; 79 } 80 81 /* Scrub the realtime summary. */ 82 int 83 xchk_rtsummary( 84 struct xfs_scrub *sc) 85 { 86 struct xfs_inode *rsumip = sc->mp->m_rsumip; 87 struct xfs_inode *old_ip = sc->ip; 88 uint old_ilock_flags = sc->ilock_flags; 89 int error = 0; 90 91 /* 92 * We ILOCK'd the rt bitmap ip in the setup routine, now lock the 93 * rt summary ip in compliance with the rt inode locking rules. 94 * 95 * Since we switch sc->ip to rsumip we have to save the old ilock 96 * flags so that we don't mix up the inode state that @sc tracks. 97 */ 98 sc->ip = rsumip; 99 sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTSUM; 100 xfs_ilock(sc->ip, sc->ilock_flags); 101 102 /* Invoke the fork scrubber. */ 103 error = xchk_metadata_inode_forks(sc); 104 if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)) 105 goto out; 106 107 /* XXX: implement this some day */ 108 xchk_set_incomplete(sc); 109 out: 110 /* Switch back to the rtbitmap inode and lock flags. */ 111 xfs_iunlock(sc->ip, sc->ilock_flags); 112 sc->ilock_flags = old_ilock_flags; 113 sc->ip = old_ip; 114 return error; 115 } 116 117 118 /* xref check that the extent is not free in the rtbitmap */ 119 void 120 xchk_xref_is_used_rt_space( 121 struct xfs_scrub *sc, 122 xfs_rtblock_t fsbno, 123 xfs_extlen_t len) 124 { 125 xfs_rtblock_t startext; 126 xfs_rtblock_t endext; 127 xfs_rtblock_t extcount; 128 bool is_free; 129 int error; 130 131 if (xchk_skip_xref(sc->sm)) 132 return; 133 134 startext = fsbno; 135 endext = fsbno + len - 1; 136 do_div(startext, sc->mp->m_sb.sb_rextsize); 137 do_div(endext, sc->mp->m_sb.sb_rextsize); 138 extcount = endext - startext + 1; 139 xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP); 140 error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount, 141 &is_free); 142 if (!xchk_should_check_xref(sc, &error, NULL)) 143 goto out_unlock; 144 if (is_free) 145 xchk_ino_xref_set_corrupt(sc, sc->mp->m_rbmip->i_ino); 146 out_unlock: 147 xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP); 148 } 149