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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*/
#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_alloc.h"
#include "xfs_rtalloc.h"
#include "xfs_inode.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
#include "scrub/trace.h"
/* Set us up with the realtime metadata locked. */
int
xchk_setup_rt(
struct xfs_scrub *sc,
struct xfs_inode *ip)
{
int error;
error = xchk_setup_fs(sc, ip);
if (error)
return error;
sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTBITMAP;
sc->ip = sc->mp->m_rbmip;
xfs_ilock(sc->ip, sc->ilock_flags);
return 0;
}
/* Realtime bitmap. */
/* Scrub a free extent record from the realtime bitmap. */
STATIC int
xchk_rtbitmap_rec(
struct xfs_trans *tp,
struct xfs_rtalloc_rec *rec,
void *priv)
{
struct xfs_scrub *sc = priv;
xfs_rtblock_t startblock;
xfs_rtblock_t blockcount;
startblock = rec->ar_startext * tp->t_mountp->m_sb.sb_rextsize;
blockcount = rec->ar_extcount * tp->t_mountp->m_sb.sb_rextsize;
if (startblock + blockcount <= startblock ||
!xfs_verify_rtbno(sc->mp, startblock) ||
!xfs_verify_rtbno(sc->mp, startblock + blockcount - 1))
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
return 0;
}
/* Scrub the realtime bitmap. */
int
xchk_rtbitmap(
struct xfs_scrub *sc)
{
int error;
/* Invoke the fork scrubber. */
error = xchk_metadata_inode_forks(sc);
if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
return error;
error = xfs_rtalloc_query_all(sc->tp, xchk_rtbitmap_rec, sc);
if (!xchk_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
goto out;
out:
return error;
}
/* Scrub the realtime summary. */
int
xchk_rtsummary(
struct xfs_scrub *sc)
{
struct xfs_inode *rsumip = sc->mp->m_rsumip;
struct xfs_inode *old_ip = sc->ip;
uint old_ilock_flags = sc->ilock_flags;
int error = 0;
/*
* We ILOCK'd the rt bitmap ip in the setup routine, now lock the
* rt summary ip in compliance with the rt inode locking rules.
*
* Since we switch sc->ip to rsumip we have to save the old ilock
* flags so that we don't mix up the inode state that @sc tracks.
*/
sc->ip = rsumip;
sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTSUM;
xfs_ilock(sc->ip, sc->ilock_flags);
/* Invoke the fork scrubber. */
error = xchk_metadata_inode_forks(sc);
if (error || (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT))
goto out;
/* XXX: implement this some day */
xchk_set_incomplete(sc);
out:
/* Switch back to the rtbitmap inode and lock flags. */
xfs_iunlock(sc->ip, sc->ilock_flags);
sc->ilock_flags = old_ilock_flags;
sc->ip = old_ip;
return error;
}
/* xref check that the extent is not free in the rtbitmap */
void
xchk_xref_is_used_rt_space(
struct xfs_scrub *sc,
xfs_rtblock_t fsbno,
xfs_extlen_t len)
{
xfs_rtblock_t startext;
xfs_rtblock_t endext;
xfs_rtblock_t extcount;
bool is_free;
int error;
if (xchk_skip_xref(sc->sm))
return;
startext = fsbno;
endext = fsbno + len - 1;
do_div(startext, sc->mp->m_sb.sb_rextsize);
if (do_div(endext, sc->mp->m_sb.sb_rextsize))
endext++;
extcount = endext - startext;
xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount,
&is_free);
if (!xchk_should_check_xref(sc, &error, NULL))
goto out_unlock;
if (is_free)
xchk_ino_xref_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
out_unlock:
xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
}
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