fs/xfs/scrub/rtbitmap.c

   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. */
  41 int
  42 xfs_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. */
  62 STATIC int
  63 xfs_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. */
  79 int
  80 xfs_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
  89 out:
  90         return error;
  91 }
  92
  93 /* Scrub the realtime summary. */
  94 int
  95 xfs_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 */
 104 void
 105 xfs_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,
 120                                 NULL);
 121 out_unlock:
 122         xfs_iunlock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
 123 }