git.oblomov.eu Git - linux-2.6/blob - fs/xfs/xfs_vfsops.c

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #include "xfs.h"
  19 #include "xfs_fs.h"
  20 #include "xfs_types.h"
  21 #include "xfs_bit.h"
  22 #include "xfs_log.h"
  23 #include "xfs_inum.h"
  24 #include "xfs_trans.h"
  25 #include "xfs_sb.h"
  26 #include "xfs_ag.h"
  27 #include "xfs_dir2.h"
  28 #include "xfs_dmapi.h"
  29 #include "xfs_mount.h"
  30 #include "xfs_da_btree.h"
  31 #include "xfs_bmap_btree.h"
  32 #include "xfs_ialloc_btree.h"
  33 #include "xfs_alloc_btree.h"
  34 #include "xfs_dir2_sf.h"
  35 #include "xfs_attr_sf.h"
  36 #include "xfs_dinode.h"
  37 #include "xfs_inode.h"
  38 #include "xfs_inode_item.h"
  39 #include "xfs_btree.h"
  40 #include "xfs_alloc.h"
  41 #include "xfs_ialloc.h"
  42 #include "xfs_quota.h"
  43 #include "xfs_error.h"
  44 #include "xfs_bmap.h"
  45 #include "xfs_rw.h"
  46 #include "xfs_buf_item.h"
  47 #include "xfs_log_priv.h"
  48 #include "xfs_dir2_trace.h"
  49 #include "xfs_extfree_item.h"
  50 #include "xfs_acl.h"
  51 #include "xfs_attr.h"
  52 #include "xfs_mru_cache.h"
  53 #include "xfs_filestream.h"
  54 #include "xfs_fsops.h"
  55 #include "xfs_vnodeops.h"
  56 #include "xfs_vfsops.h"
  57 #include "xfs_utils.h"
  58 #include "xfs_sync.h"
  59
  60
  61 /*
  62  * xfs_unmount_flush implements a set of flush operation on special
  63  * inodes, which are needed as a separate set of operations so that
  64  * they can be called as part of relocation process.
  65  */
  66 int
  67 xfs_unmount_flush(
  68         xfs_mount_t     *mp,            /* Mount structure we are getting
  69                                            rid of. */
  70         int             relocation)     /* Called from vfs relocation. */
  71 {
  72         xfs_inode_t     *rip = mp->m_rootip;
  73         xfs_inode_t     *rbmip;
  74         xfs_inode_t     *rsumip = NULL;
  75         int             error;
  76
  77         xfs_ilock(rip, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
  78         xfs_iflock(rip);
  79
  80         /*
  81          * Flush out the real time inodes.
  82          */
  83         if ((rbmip = mp->m_rbmip) != NULL) {
  84                 xfs_ilock(rbmip, XFS_ILOCK_EXCL);
  85                 xfs_iflock(rbmip);
  86                 error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC);
  87                 xfs_iunlock(rbmip, XFS_ILOCK_EXCL);
  88
  89                 if (error == EFSCORRUPTED)
  90                         goto fscorrupt_out;
  91
  92                 ASSERT(vn_count(VFS_I(rbmip)) == 1);
  93
  94                 rsumip = mp->m_rsumip;
  95                 xfs_ilock(rsumip, XFS_ILOCK_EXCL);
  96                 xfs_iflock(rsumip);
  97                 error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC);
  98                 xfs_iunlock(rsumip, XFS_ILOCK_EXCL);
  99
 100                 if (error == EFSCORRUPTED)
 101                         goto fscorrupt_out;
 102
 103                 ASSERT(vn_count(VFS_I(rsumip)) == 1);
 104         }
 105
 106         /*
 107          * Synchronously flush root inode to disk
 108          */
 109         error = xfs_iflush(rip, XFS_IFLUSH_SYNC);
 110         if (error == EFSCORRUPTED)
 111                 goto fscorrupt_out2;
 112
 113         if (vn_count(VFS_I(rip)) != 1 && !relocation) {
 114                 xfs_iunlock(rip, XFS_ILOCK_EXCL);
 115                 return XFS_ERROR(EBUSY);
 116         }
 117
 118         /*
 119          * Release dquot that rootinode, rbmino and rsumino might be holding,
 120          * flush and purge the quota inodes.
 121          */
 122         error = XFS_QM_UNMOUNT(mp);
 123         if (error == EFSCORRUPTED)
 124                 goto fscorrupt_out2;
 125
 126         if (rbmip) {
 127                 IRELE(rbmip);
 128                 IRELE(rsumip);
 129         }
 130
 131         xfs_iunlock(rip, XFS_ILOCK_EXCL);
 132         return 0;
 133
 134 fscorrupt_out:
 135         xfs_ifunlock(rip);
 136
 137 fscorrupt_out2:
 138         xfs_iunlock(rip, XFS_ILOCK_EXCL);
 139
 140         return XFS_ERROR(EFSCORRUPTED);
 141 }
 142