1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2022-2024 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <[email protected]>
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_rtgroup.h"
13 #include "xfs_log_format.h"
14 #include "xfs_trans.h"
15 #include "xfs_sb.h"
16 #include "xfs_rmap.h"
17 #include "scrub/scrub.h"
18 #include "scrub/common.h"
19 #include "scrub/repair.h"
20
21 /* Set us up with a transaction and an empty context. */
22 int
xchk_setup_rgsuperblock(struct xfs_scrub * sc)23 xchk_setup_rgsuperblock(
24 struct xfs_scrub *sc)
25 {
26 return xchk_trans_alloc(sc, 0);
27 }
28
29 /* Cross-reference with the other rt metadata. */
30 STATIC void
xchk_rgsuperblock_xref(struct xfs_scrub * sc)31 xchk_rgsuperblock_xref(
32 struct xfs_scrub *sc)
33 {
34 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
35 return;
36
37 xchk_xref_is_used_rt_space(sc, xfs_rgbno_to_rtb(sc->sr.rtg, 0), 1);
38 xchk_xref_is_only_rt_owned_by(sc, 0, 1, &XFS_RMAP_OINFO_FS);
39 }
40
41 int
xchk_rgsuperblock(struct xfs_scrub * sc)42 xchk_rgsuperblock(
43 struct xfs_scrub *sc)
44 {
45 xfs_rgnumber_t rgno = sc->sm->sm_agno;
46 int error;
47
48 /*
49 * Only rtgroup 0 has a superblock. We may someday want to use higher
50 * rgno for other functions, similar to what we do with the primary
51 * super scrub function.
52 */
53 if (rgno != 0)
54 return -ENOENT;
55
56 /*
57 * Grab an active reference to the rtgroup structure. If we can't get
58 * it, we're racing with something that's tearing down the group, so
59 * signal that the group no longer exists. Take the rtbitmap in shared
60 * mode so that the group can't change while we're doing things.
61 */
62 error = xchk_rtgroup_init_existing(sc, rgno, &sc->sr);
63 if (!xchk_xref_process_error(sc, 0, 0, &error))
64 return error;
65
66 error = xchk_rtgroup_lock(sc, &sc->sr, XFS_RTGLOCK_BITMAP_SHARED);
67 if (error)
68 return error;
69
70 /*
71 * Since we already validated the rt superblock at mount time, we don't
72 * need to check its contents again. All we need is to cross-reference.
73 */
74 xchk_rgsuperblock_xref(sc);
75 return 0;
76 }
77
78 #ifdef CONFIG_XFS_ONLINE_REPAIR
79 int
xrep_rgsuperblock(struct xfs_scrub * sc)80 xrep_rgsuperblock(
81 struct xfs_scrub *sc)
82 {
83 ASSERT(rtg_rgno(sc->sr.rtg) == 0);
84
85 xfs_log_sb(sc->tp);
86 return 0;
87 }
88 #endif /* CONFIG_XFS_ONLINE_REPAIR */
89