Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0-or-later
2 : /*
3 : * Copyright (C) 2017-2023 Oracle. All Rights Reserved.
4 : * Author: Darrick J. Wong <djwong@kernel.org>
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 "xfs_bmap.h"
17 : #include "scrub/scrub.h"
18 : #include "scrub/common.h"
19 :
20 : /* Set us up with the realtime metadata locked. */
21 : int
22 601552 : xchk_setup_rt(
23 : struct xfs_scrub *sc)
24 : {
25 601552 : int error;
26 :
27 601552 : error = xchk_setup_fs(sc);
28 601552 : if (error)
29 : return error;
30 :
31 601552 : sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTBITMAP;
32 601552 : sc->ip = sc->mp->m_rbmip;
33 601552 : xfs_ilock(sc->ip, sc->ilock_flags);
34 :
35 601552 : return 0;
36 : }
37 :
38 : /* Realtime bitmap. */
39 :
40 : /* Scrub a free extent record from the realtime bitmap. */
41 : STATIC int
42 12775568 : xchk_rtbitmap_rec(
43 : struct xfs_mount *mp,
44 : struct xfs_trans *tp,
45 : const struct xfs_rtalloc_rec *rec,
46 : void *priv)
47 : {
48 12775568 : struct xfs_scrub *sc = priv;
49 12775568 : xfs_rtblock_t startblock;
50 12775568 : xfs_rtblock_t blockcount;
51 :
52 12775568 : startblock = rec->ar_startext * mp->m_sb.sb_rextsize;
53 12775568 : blockcount = rec->ar_extcount * mp->m_sb.sb_rextsize;
54 :
55 12775568 : if (!xfs_verify_rtext(mp, startblock, blockcount))
56 0 : xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
57 12775568 : return 0;
58 : }
59 :
60 : /* Make sure the entire rtbitmap file is mapped with written extents. */
61 : STATIC int
62 79603 : xchk_rtbitmap_check_extents(
63 : struct xfs_scrub *sc)
64 : {
65 79603 : struct xfs_mount *mp = sc->mp;
66 79603 : struct xfs_bmbt_irec map;
67 79603 : xfs_rtblock_t off;
68 79603 : int nmap;
69 79603 : int error = 0;
70 :
71 159207 : for (off = 0; off < mp->m_sb.sb_rbmblocks;) {
72 79604 : if (xchk_should_terminate(sc, &error) ||
73 79604 : (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
74 : break;
75 :
76 : /* Make sure we have a written extent. */
77 79604 : nmap = 1;
78 159208 : error = xfs_bmapi_read(mp->m_rbmip, off,
79 79604 : mp->m_sb.sb_rbmblocks - off, &map, &nmap,
80 : XFS_DATA_FORK);
81 79604 : if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, off, &error))
82 : break;
83 :
84 79604 : if (nmap != 1 || !xfs_bmap_is_written_extent(&map)) {
85 0 : xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, off);
86 0 : break;
87 : }
88 :
89 79604 : off += map.br_blockcount;
90 : }
91 :
92 79603 : return error;
93 : }
94 :
95 : /* Scrub the realtime bitmap. */
96 : int
97 79603 : xchk_rtbitmap(
98 : struct xfs_scrub *sc)
99 : {
100 79603 : int error;
101 :
102 : /* Is the size of the rtbitmap correct? */
103 159206 : if (sc->mp->m_rbmip->i_disk_size !=
104 79603 : XFS_FSB_TO_B(sc->mp, sc->mp->m_sb.sb_rbmblocks)) {
105 0 : xchk_ino_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
106 0 : return 0;
107 : }
108 :
109 : /* Invoke the fork scrubber. */
110 79603 : error = xchk_metadata_inode_forks(sc);
111 79603 : if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
112 : return error;
113 :
114 79603 : error = xchk_rtbitmap_check_extents(sc);
115 79603 : if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
116 : return error;
117 :
118 79603 : error = xfs_rtalloc_query_all(sc->mp, sc->tp, xchk_rtbitmap_rec, sc);
119 79603 : if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
120 : goto out;
121 :
122 : out:
123 79603 : return error;
124 : }
125 :
126 : /* Scrub the realtime summary. */
127 : int
128 521949 : xchk_rtsummary(
129 : struct xfs_scrub *sc)
130 : {
131 521949 : struct xfs_inode *rsumip = sc->mp->m_rsumip;
132 521949 : struct xfs_inode *old_ip = sc->ip;
133 521949 : uint old_ilock_flags = sc->ilock_flags;
134 521949 : int error = 0;
135 :
136 : /*
137 : * We ILOCK'd the rt bitmap ip in the setup routine, now lock the
138 : * rt summary ip in compliance with the rt inode locking rules.
139 : *
140 : * Since we switch sc->ip to rsumip we have to save the old ilock
141 : * flags so that we don't mix up the inode state that @sc tracks.
142 : */
143 521949 : sc->ip = rsumip;
144 521949 : sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTSUM;
145 521949 : xfs_ilock(sc->ip, sc->ilock_flags);
146 :
147 : /* Invoke the fork scrubber. */
148 521949 : error = xchk_metadata_inode_forks(sc);
149 521949 : if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
150 0 : goto out;
151 :
152 : /* XXX: implement this some day */
153 521949 : xchk_set_incomplete(sc);
154 521949 : out:
155 : /* Switch back to the rtbitmap inode and lock flags. */
156 521949 : xfs_iunlock(sc->ip, sc->ilock_flags);
157 521949 : sc->ilock_flags = old_ilock_flags;
158 521949 : sc->ip = old_ip;
159 521949 : return error;
160 : }
161 :
162 :
163 : /* xref check that the extent is not free in the rtbitmap */
164 : void
165 163556421 : xchk_xref_is_used_rt_space(
166 : struct xfs_scrub *sc,
167 : xfs_rtblock_t fsbno,
168 : xfs_extlen_t len)
169 : {
170 163556421 : xfs_rtblock_t startext;
171 163556421 : xfs_rtblock_t endext;
172 163556421 : xfs_rtblock_t extcount;
173 163556421 : bool is_free;
174 163556421 : int error;
175 :
176 163556421 : if (xchk_skip_xref(sc->sm))
177 0 : return;
178 :
179 163556421 : startext = fsbno;
180 163556421 : endext = fsbno + len - 1;
181 163556421 : do_div(startext, sc->mp->m_sb.sb_rextsize);
182 163556421 : do_div(endext, sc->mp->m_sb.sb_rextsize);
183 163556421 : extcount = endext - startext + 1;
184 163556421 : xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
185 163560734 : error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount,
186 : &is_free);
187 163571091 : if (!xchk_should_check_xref(sc, &error, NULL))
188 0 : goto out_unlock;
189 163571386 : if (is_free)
190 0 : xchk_ino_xref_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
191 163571386 : out_unlock:
192 163571386 : xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
193 : }
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