1/*
  2 * Copyright (C) 2017 Oracle.  All Rights Reserved.
  3 *
  4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
  5 *
  6 * This program is free software; you can redistribute it and/or
  7 * modify it under the terms of the GNU General Public License
  8 * as published by the Free Software Foundation; either version 2
  9 * of the License, or (at your option) any later version.
 10 *
 11 * This program is distributed in the hope that it would be useful,
 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14 * GNU General Public License for more details.
 15 *
 16 * You should have received a copy of the GNU General Public License
 17 * along with this program; if not, write the Free Software Foundation,
 18 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
 19 */
 20#include "xfs.h"
 21#include "xfs_fs.h"
 22#include "xfs_shared.h"
 23#include "xfs_format.h"
 24#include "xfs_trans_resv.h"
 25#include "xfs_mount.h"
 26#include "xfs_defer.h"
 27#include "xfs_btree.h"
 28#include "xfs_bit.h"
 29#include "xfs_log_format.h"
 30#include "xfs_trans.h"
 31#include "xfs_sb.h"
 32#include "xfs_alloc.h"
 33#include "xfs_rtalloc.h"
 34#include "xfs_inode.h"
 35#include "scrub/xfs_scrub.h"
 36#include "scrub/scrub.h"
 37#include "scrub/common.h"
 38#include "scrub/trace.h"
 39
 40/* Set us up with the realtime metadata locked. */
 41int
 42xfs_scrub_setup_rt(
 43	struct xfs_scrub_context	*sc,
 44	struct xfs_inode		*ip)
 45{
 46	int				error;
 47
 48	error = xfs_scrub_setup_fs(sc, ip);
 49	if (error)
 50		return error;
 51
 52	sc->ilock_flags = XFS_ILOCK_EXCL | XFS_ILOCK_RTBITMAP;
 53	sc->ip = sc->mp->m_rbmip;
 54	xfs_ilock(sc->ip, sc->ilock_flags);
 55
 56	return 0;
 57}
 58
 59/* Realtime bitmap. */
 60
 61/* Scrub a free extent record from the realtime bitmap. */
 62STATIC int
 63xfs_scrub_rtbitmap_rec(
 64	struct xfs_trans		*tp,
 65	struct xfs_rtalloc_rec		*rec,
 66	void				*priv)
 67{
 68	struct xfs_scrub_context	*sc = priv;
 69
 70	if (rec->ar_startblock + rec->ar_blockcount <= rec->ar_startblock ||
 71	    !xfs_verify_rtbno(sc->mp, rec->ar_startblock) ||
 72	    !xfs_verify_rtbno(sc->mp, rec->ar_startblock +
 73			rec->ar_blockcount - 1))
 74		xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
 75	return 0;
 76}
 77
 78/* Scrub the realtime bitmap. */
 79int
 80xfs_scrub_rtbitmap(
 81	struct xfs_scrub_context	*sc)
 82{
 83	int				error;
 84
 85	error = xfs_rtalloc_query_all(sc->tp, xfs_scrub_rtbitmap_rec, sc);
 86	if (!xfs_scrub_fblock_process_error(sc, XFS_DATA_FORK, 0, &error))
 87		goto out;
 88
 89out:
 90	return error;
 91}
 92
 93/* Scrub the realtime summary. */
 94int
 95xfs_scrub_rtsummary(
 96	struct xfs_scrub_context	*sc)
 97{
 98	/* XXX: implement this some day */
 99	return -ENOENT;
100}
101
102
103/* xref check that the extent is not free in the rtbitmap */
104void
105xfs_scrub_xref_is_used_rt_space(
106	struct xfs_scrub_context	*sc,
107	xfs_rtblock_t			fsbno,
108	xfs_extlen_t			len)
109{
110	bool				is_free;
111	int				error;
112
113	xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
114	error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, fsbno, len,
115			&is_free);
116	if (!xfs_scrub_should_check_xref(sc, &error, NULL))
117		goto out_unlock;
118	if (is_free)
119		xfs_scrub_ino_xref_set_corrupt(sc, sc->mp->m_rbmip->i_ino);
120out_unlock:
121	xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
122}