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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2022-2024 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_rtgroup.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_rmap.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/repair.h"
/* Set us up with a transaction and an empty context. */
int
xchk_setup_rgsuperblock(
struct xfs_scrub *sc)
{
return xchk_trans_alloc(sc, 0);
}
/* Cross-reference with the other rt metadata. */
STATIC void
xchk_rgsuperblock_xref(
struct xfs_scrub *sc)
{
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
xchk_xref_is_used_rt_space(sc, xfs_rgbno_to_rtb(sc->sr.rtg, 0), 1);
xchk_xref_is_only_rt_owned_by(sc, 0, 1, &XFS_RMAP_OINFO_FS);
}
int
xchk_rgsuperblock(
struct xfs_scrub *sc)
{
xfs_rgnumber_t rgno = sc->sm->sm_agno;
int error;
/*
* Only rtgroup 0 has a superblock. We may someday want to use higher
* rgno for other functions, similar to what we do with the primary
* super scrub function.
*/
if (rgno != 0)
return -ENOENT;
/*
* Grab an active reference to the rtgroup structure. If we can't get
* it, we're racing with something that's tearing down the group, so
* signal that the group no longer exists. Take the rtbitmap in shared
* mode so that the group can't change while we're doing things.
*/
error = xchk_rtgroup_init_existing(sc, rgno, &sc->sr);
if (!xchk_xref_process_error(sc, 0, 0, &error))
return error;
error = xchk_rtgroup_lock(sc, &sc->sr, XFS_RTGLOCK_BITMAP_SHARED);
if (error)
return error;
/*
* Since we already validated the rt superblock at mount time, we don't
* need to check its contents again. All we need is to cross-reference.
*/
xchk_rgsuperblock_xref(sc);
return 0;
}
#ifdef CONFIG_XFS_ONLINE_REPAIR
int
xrep_rgsuperblock(
struct xfs_scrub *sc)
{
ASSERT(rtg_rgno(sc->sr.rtg) == 0);
xfs_log_sb(sc->tp);
return 0;
}
#endif /* CONFIG_XFS_ONLINE_REPAIR */
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