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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2021 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_defer.h"
#include "xfs_btree.h"
#include "xfs_bit.h"
#include "xfs_log_format.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_rmap.h"
#include "xfs_rmap_btree.h"
#include "xfs_rtrmap_btree.h"
#include "xfs_inode.h"
#include "xfs_rtalloc.h"
#include "xfs_refcount.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/btree.h"
#include "scrub/trace.h"
#include "scrub/repair.h"
/* Set us up with the realtime metadata locked. */
int
xchk_setup_rtrmapbt(
struct xfs_scrub *sc)
{
struct xfs_mount *mp = sc->mp;
int error;
if (xchk_could_repair(sc)) {
error = xrep_setup_rtrmapbt(sc);
if (error)
return error;
}
error = xchk_setup_fs(sc);
if (error)
return error;
error = xchk_install_inode(sc, mp->m_rrmapip);
if (error)
return error;
xchk_rt_init(sc, &sc->sr);
return 0;
}
/* Realtime reverse mapping. */
/* Cross-reference a rmap against the refcount btree. */
STATIC void
xchk_rtrmapbt_xref_rtrefc(
struct xfs_scrub *sc,
struct xfs_rmap_irec *irec)
{
xfs_rtblock_t fbno;
xfs_filblks_t flen;
bool non_inode;
bool is_bmbt;
bool is_attr;
bool is_unwritten;
int error;
if (!sc->sr.refc_cur || xchk_skip_xref(sc->sm))
return;
non_inode = XFS_RMAP_NON_INODE_OWNER(irec->rm_owner);
is_bmbt = irec->rm_flags & XFS_RMAP_BMBT_BLOCK;
is_attr = irec->rm_flags & XFS_RMAP_ATTR_FORK;
is_unwritten = irec->rm_flags & XFS_RMAP_UNWRITTEN;
/* If this is shared, must be a data fork extent. */
error = xfs_refcount_find_shared(sc->sr.refc_cur, irec->rm_startblock,
irec->rm_blockcount, &fbno, &flen, false);
if (!xchk_should_check_xref(sc, &error, &sc->sr.refc_cur))
return;
if (flen != 0 && (non_inode || is_attr || is_bmbt || is_unwritten))
xchk_btree_xref_set_corrupt(sc, sc->sr.refc_cur, 0);
}
/* Cross-reference with other metadata. */
STATIC void
xchk_rtrmapbt_xref(
struct xfs_scrub *sc,
struct xfs_rmap_irec *irec)
{
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return;
xchk_xref_is_used_rt_space(sc, irec->rm_startblock,
irec->rm_blockcount);
if (irec->rm_owner == XFS_RMAP_OWN_COW)
xchk_xref_is_cow_staging(sc, irec->rm_startblock,
irec->rm_blockcount);
else
xchk_rtrmapbt_xref_rtrefc(sc, irec);
}
/* Scrub a realtime rmapbt record. */
STATIC int
xchk_rtrmapbt_rec(
struct xchk_btree *bs,
const union xfs_btree_rec *rec)
{
struct xfs_mount *mp = bs->cur->bc_mp;
struct xfs_rmap_irec irec;
bool non_inode;
bool is_bmbt;
bool is_attr;
bool is_unwritten;
bool is_cow;
int error;
error = xfs_rmap_btrec_to_irec(bs->cur, rec, &irec);
if (!xchk_btree_process_error(bs->sc, bs->cur, 0, &error))
goto out;
if (irec.rm_startblock + irec.rm_blockcount <= irec.rm_startblock ||
(!xfs_verify_rtbno(mp, irec.rm_startblock) ||
!xfs_verify_rtbno(mp, irec.rm_startblock +
irec.rm_blockcount - 1)))
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
/* Check flags. */
non_inode = XFS_RMAP_NON_INODE_OWNER(irec.rm_owner);
is_cow = xfs_has_rtreflink(mp) &&
irec.rm_owner == XFS_RMAP_OWN_COW;
is_bmbt = irec.rm_flags & XFS_RMAP_BMBT_BLOCK;
is_attr = irec.rm_flags & XFS_RMAP_ATTR_FORK;
is_unwritten = irec.rm_flags & XFS_RMAP_UNWRITTEN;
if (is_bmbt || (non_inode && !is_cow) || is_attr)
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
if (is_cow && irec.rm_offset != 0)
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
if (is_unwritten && is_cow)
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
if (!non_inode && !xfs_verify_ino(mp, irec.rm_owner))
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
xchk_rtrmapbt_xref(bs->sc, &irec);
out:
return error;
}
/* Scrub the realtime rmap btree. */
int
xchk_rtrmapbt(
struct xfs_scrub *sc)
{
struct xfs_owner_info oinfo;
struct xfs_mount *mp = sc->mp;
xfs_rmap_ino_bmbt_owner(&oinfo, mp->m_rrmapip->i_ino, XFS_DATA_FORK);
return xchk_btree(sc, sc->sr.rmap_cur, xchk_rtrmapbt_rec, &oinfo,
NULL);
}
/* xref check that the extent has no realtime reverse mapping at all */
void
xchk_xref_has_no_rt_owner(
struct xfs_scrub *sc,
xfs_rtblock_t bno,
xfs_filblks_t len)
{
bool has_rmap;
int error;
if (!sc->sr.rmap_cur || xchk_skip_xref(sc->sm))
return;
error = xfs_rmap_has_record(sc->sr.rmap_cur, bno, len, &has_rmap);
if (!xchk_should_check_xref(sc, &error, &sc->sr.rmap_cur))
return;
if (has_rmap)
xchk_btree_xref_set_corrupt(sc, sc->sr.rmap_cur, 0);
}
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