1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2017 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
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"
17 #include "scrub/scrub.h"
18 #include "scrub/common.h"
20 /* Set us up with the realtime metadata locked. */
28 error = xchk_setup_fs(sc, ip);
32 sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTBITMAP;
33 sc->ip = sc->mp->m_rbmip;
34 xfs_ilock(sc->ip, sc->ilock_flags);
39 /* Realtime bitmap. */
41 /* Scrub a free extent record from the realtime bitmap. */
45 struct xfs_rtalloc_rec *rec,
48 struct xfs_scrub *sc = priv;
49 xfs_rtblock_t startblock;
50 xfs_rtblock_t blockcount;
52 startblock = rec->ar_startext * tp->t_mountp->m_sb.sb_rextsize;
53 blockcount = rec->ar_extcount * tp->t_mountp->m_sb.sb_rextsize;
55 if (startblock + blockcount <= startblock ||
56 !xfs_verify_rtbno(sc->mp, startblock) ||
57 !xfs_verify_rtbno(sc->mp, startblock + blockcount - 1))
58 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
62 /* Make sure the entire rtbitmap file is mapped with written extents. */
64 xchk_rtbitmap_check_extents(
67 struct xfs_mount *mp = sc->mp;
68 struct xfs_bmbt_irec map;
73 for (off = 0; off < mp->m_sb.sb_rbmblocks;) {
74 if (xchk_should_terminate(sc, &error) ||
75 (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
78 /* Make sure we have a written extent. */
80 error = xfs_bmapi_read(mp->m_rbmip, off,
81 mp->m_sb.sb_rbmblocks - off, &map, &nmap,
83 if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, off, &error))
86 if (nmap != 1 || !xfs_bmap_is_written_extent(&map)) {
87 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, off);
91 off += map.br_blockcount;
97 /* Scrub the realtime bitmap. */
100 struct xfs_scrub *sc)
104 /* Is the size of the rtbitmap correct? */
105 if (sc->mp->m_rbmip->i_d.di_size !=
106 XFS_FSB_TO_B(sc->mp, sc->mp->m_sb.sb_rbmblocks)) {
107 xchk_ino_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
111 /* Invoke the fork scrubber. */
112 error = xchk_metadata_inode_forks(sc);
113 if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
116 error = xchk_rtbitmap_check_extents(sc);
117 if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
120 error = xfs_rtalloc_query_all(sc->tp, xchk_rtbitmap_rec, sc);
121 if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
128 /* Scrub the realtime summary. */
131 struct xfs_scrub *sc)
133 struct xfs_inode *rsumip = sc->mp->m_rsumip;
134 struct xfs_inode *old_ip = sc->ip;
135 uint old_ilock_flags = sc->ilock_flags;
139 * We ILOCK'd the rt bitmap ip in the setup routine, now lock the
140 * rt summary ip in compliance with the rt inode locking rules.
142 * Since we switch sc->ip to rsumip we have to save the old ilock
143 * flags so that we don't mix up the inode state that @sc tracks.
146 sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTSUM;
147 xfs_ilock(sc->ip, sc->ilock_flags);
149 /* Invoke the fork scrubber. */
150 error = xchk_metadata_inode_forks(sc);
151 if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
154 /* XXX: implement this some day */
155 xchk_set_incomplete(sc);
157 /* Switch back to the rtbitmap inode and lock flags. */
158 xfs_iunlock(sc->ip, sc->ilock_flags);
159 sc->ilock_flags = old_ilock_flags;
165 /* xref check that the extent is not free in the rtbitmap */
167 xchk_xref_is_used_rt_space(
168 struct xfs_scrub *sc,
172 xfs_rtblock_t startext;
173 xfs_rtblock_t endext;
174 xfs_rtblock_t extcount;
178 if (xchk_skip_xref(sc->sm))
182 endext = fsbno + len - 1;
183 do_div(startext, sc->mp->m_sb.sb_rextsize);
184 do_div(endext, sc->mp->m_sb.sb_rextsize);
185 extcount = endext - startext + 1;
186 xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
187 error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount,
189 if (!xchk_should_check_xref(sc, &error, NULL))
192 xchk_ino_xref_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
194 xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);