Loading...
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. */
20int
21xchk_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. */
41STATIC int
42xchk_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. */
62int
63xchk_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
77out:
78 return error;
79}
80
81/* Scrub the realtime summary. */
82int
83xchk_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);
109out:
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 */
119void
120xchk_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);
146out_unlock:
147 xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
148}
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 "xfs_bmap.h"
17#include "scrub/scrub.h"
18#include "scrub/common.h"
19
20/* Set us up with the realtime metadata locked. */
21int
22xchk_setup_rt(
23 struct xfs_scrub *sc)
24{
25 int error;
26
27 error = xchk_setup_fs(sc);
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. */
41STATIC int
42xchk_rtbitmap_rec(
43 struct xfs_mount *mp,
44 struct xfs_trans *tp,
45 const struct xfs_rtalloc_rec *rec,
46 void *priv)
47{
48 struct xfs_scrub *sc = priv;
49 xfs_rtblock_t startblock;
50 xfs_rtblock_t blockcount;
51
52 startblock = rec->ar_startext * mp->m_sb.sb_rextsize;
53 blockcount = rec->ar_extcount * mp->m_sb.sb_rextsize;
54
55 if (!xfs_verify_rtext(mp, startblock, blockcount))
56 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
57 return 0;
58}
59
60/* Make sure the entire rtbitmap file is mapped with written extents. */
61STATIC int
62xchk_rtbitmap_check_extents(
63 struct xfs_scrub *sc)
64{
65 struct xfs_mount *mp = sc->mp;
66 struct xfs_bmbt_irec map;
67 xfs_rtblock_t off;
68 int nmap;
69 int error = 0;
70
71 for (off = 0; off < mp->m_sb.sb_rbmblocks;) {
72 if (xchk_should_terminate(sc, &error) ||
73 (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
74 break;
75
76 /* Make sure we have a written extent. */
77 nmap = 1;
78 error = xfs_bmapi_read(mp->m_rbmip, off,
79 mp->m_sb.sb_rbmblocks - off, &map, &nmap,
80 XFS_DATA_FORK);
81 if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, off, &error))
82 break;
83
84 if (nmap != 1 || !xfs_bmap_is_written_extent(&map)) {
85 xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, off);
86 break;
87 }
88
89 off += map.br_blockcount;
90 }
91
92 return error;
93}
94
95/* Scrub the realtime bitmap. */
96int
97xchk_rtbitmap(
98 struct xfs_scrub *sc)
99{
100 int error;
101
102 /* Is the size of the rtbitmap correct? */
103 if (sc->mp->m_rbmip->i_disk_size !=
104 XFS_FSB_TO_B(sc->mp, sc->mp->m_sb.sb_rbmblocks)) {
105 xchk_ino_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
106 return 0;
107 }
108
109 /* Invoke the fork scrubber. */
110 error = xchk_metadata_inode_forks(sc);
111 if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
112 return error;
113
114 error = xchk_rtbitmap_check_extents(sc);
115 if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
116 return error;
117
118 error = xfs_rtalloc_query_all(sc->mp, sc->tp, xchk_rtbitmap_rec, sc);
119 if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
120 goto out;
121
122out:
123 return error;
124}
125
126/* Scrub the realtime summary. */
127int
128xchk_rtsummary(
129 struct xfs_scrub *sc)
130{
131 struct xfs_inode *rsumip = sc->mp->m_rsumip;
132 struct xfs_inode *old_ip = sc->ip;
133 uint old_ilock_flags = sc->ilock_flags;
134 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 sc->ip = rsumip;
144 sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTSUM;
145 xfs_ilock(sc->ip, sc->ilock_flags);
146
147 /* Invoke the fork scrubber. */
148 error = xchk_metadata_inode_forks(sc);
149 if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
150 goto out;
151
152 /* XXX: implement this some day */
153 xchk_set_incomplete(sc);
154out:
155 /* Switch back to the rtbitmap inode and lock flags. */
156 xfs_iunlock(sc->ip, sc->ilock_flags);
157 sc->ilock_flags = old_ilock_flags;
158 sc->ip = old_ip;
159 return error;
160}
161
162
163/* xref check that the extent is not free in the rtbitmap */
164void
165xchk_xref_is_used_rt_space(
166 struct xfs_scrub *sc,
167 xfs_rtblock_t fsbno,
168 xfs_extlen_t len)
169{
170 xfs_rtblock_t startext;
171 xfs_rtblock_t endext;
172 xfs_rtblock_t extcount;
173 bool is_free;
174 int error;
175
176 if (xchk_skip_xref(sc->sm))
177 return;
178
179 startext = fsbno;
180 endext = fsbno + len - 1;
181 do_div(startext, sc->mp->m_sb.sb_rextsize);
182 do_div(endext, sc->mp->m_sb.sb_rextsize);
183 extcount = endext - startext + 1;
184 xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
185 error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount,
186 &is_free);
187 if (!xchk_should_check_xref(sc, &error, NULL))
188 goto out_unlock;
189 if (is_free)
190 xchk_ino_xref_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
191out_unlock:
192 xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
193}