fs/xfs/linux-2.6/xfs_vfs.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_inum.h"
  21 #include "xfs_log.h"
  22 #include "xfs_clnt.h"
  23 #include "xfs_trans.h"
  24 #include "xfs_sb.h"
  25 #include "xfs_ag.h"
  26 #include "xfs_dir2.h"
  27 #include "xfs_imap.h"
  28 #include "xfs_alloc.h"
  29 #include "xfs_dmapi.h"
  30 #include "xfs_mount.h"
  31 #include "xfs_quota.h"
  32
  33 int
  34 vfs_mount(
  35         struct bhv_desc         *bdp,
  36         struct xfs_mount_args   *args,
  37         struct cred             *cr)
  38 {
  39         struct bhv_desc         *next = bdp;
  40
  41         ASSERT(next);
  42         while (! (bhvtovfsops(next))->vfs_mount)
  43                 next = BHV_NEXT(next);
  44         return ((*bhvtovfsops(next)->vfs_mount)(next, args, cr));
  45 }
  46
  47 int
  48 vfs_parseargs(
  49         struct bhv_desc         *bdp,
  50         char                    *s,
  51         struct xfs_mount_args   *args,
  52         int                     f)
  53 {
  54         struct bhv_desc         *next = bdp;
  55
  56         ASSERT(next);
  57         while (! (bhvtovfsops(next))->vfs_parseargs)
  58                 next = BHV_NEXT(next);
  59         return ((*bhvtovfsops(next)->vfs_parseargs)(next, s, args, f));
  60 }
  61
  62 int
  63 vfs_showargs(
  64         struct bhv_desc         *bdp,
  65         struct seq_file         *m)
  66 {
  67         struct bhv_desc         *next = bdp;
  68
  69         ASSERT(next);
  70         while (! (bhvtovfsops(next))->vfs_showargs)
  71                 next = BHV_NEXT(next);
  72         return ((*bhvtovfsops(next)->vfs_showargs)(next, m));
  73 }
  74
  75 int
  76 vfs_unmount(
  77         struct bhv_desc         *bdp,
  78         int                     fl,
  79         struct cred             *cr)
  80 {
  81         struct bhv_desc         *next = bdp;
  82
  83         ASSERT(next);
  84         while (! (bhvtovfsops(next))->vfs_unmount)
  85                 next = BHV_NEXT(next);
  86         return ((*bhvtovfsops(next)->vfs_unmount)(next, fl, cr));
  87 }
  88
  89 int
  90 vfs_mntupdate(
  91         struct bhv_desc         *bdp,
  92         int                     *fl,
  93         struct xfs_mount_args   *args)
  94 {
  95         struct bhv_desc         *next = bdp;
  96
  97         ASSERT(next);
  98         while (! (bhvtovfsops(next))->vfs_mntupdate)
  99                 next = BHV_NEXT(next);
 100         return ((*bhvtovfsops(next)->vfs_mntupdate)(next, fl, args));
 101 }
 102
 103 int
 104 vfs_root(
 105         struct bhv_desc         *bdp,
 106         bhv_vnode_t             **vpp)
 107 {
 108         struct bhv_desc         *next = bdp;
 109
 110         ASSERT(next);
 111         while (! (bhvtovfsops(next))->vfs_root)
 112                 next = BHV_NEXT(next);
 113         return ((*bhvtovfsops(next)->vfs_root)(next, vpp));
 114 }
 115
 116 int
 117 vfs_statvfs(
 118         struct bhv_desc         *bdp,
 119         bhv_statvfs_t           *statp,
 120         bhv_vnode_t             *vp)
 121 {
 122         struct bhv_desc         *next = bdp;
 123
 124         ASSERT(next);
 125         while (! (bhvtovfsops(next))->vfs_statvfs)
 126                 next = BHV_NEXT(next);
 127         return ((*bhvtovfsops(next)->vfs_statvfs)(next, statp, vp));
 128 }
 129
 130 int
 131 vfs_sync(
 132         struct bhv_desc         *bdp,
 133         int                     fl,
 134         struct cred             *cr)
 135 {
 136         struct bhv_desc         *next = bdp;
 137
 138         ASSERT(next);
 139         while (! (bhvtovfsops(next))->vfs_sync)
 140                 next = BHV_NEXT(next);
 141         return ((*bhvtovfsops(next)->vfs_sync)(next, fl, cr));
 142 }
 143
 144 int
 145 vfs_vget(
 146         struct bhv_desc         *bdp,
 147         bhv_vnode_t             **vpp,
 148         struct fid              *fidp)
 149 {
 150         struct bhv_desc         *next = bdp;
 151
 152         ASSERT(next);
 153         while (! (bhvtovfsops(next))->vfs_vget)
 154                 next = BHV_NEXT(next);
 155         return ((*bhvtovfsops(next)->vfs_vget)(next, vpp, fidp));
 156 }
 157
 158 void
 159 vfs_init_vnode(
 160         struct bhv_desc         *bdp,
 161         bhv_vnode_t             *vp,
 162         struct xfs_inode        *ip,
 163         int                     unlock)
 164 {
 165         struct bhv_desc         *next = bdp;
 166
 167         ASSERT(next);
 168         while (! (bhvtovfsops(next))->vfs_init_vnode)
 169                 next = BHV_NEXT(next);
 170         ((*bhvtovfsops(next)->vfs_init_vnode)(next, vp, ip, unlock));
 171 }
 172
 173 void
 174 vfs_force_shutdown(
 175         struct bhv_desc         *bdp,
 176         int                     fl,
 177         char                    *file,
 178         int                     line)
 179 {
 180         struct bhv_desc         *next = bdp;
 181
 182         ASSERT(next);
 183         while (! (bhvtovfsops(next))->vfs_force_shutdown)
 184                 next = BHV_NEXT(next);
 185         ((*bhvtovfsops(next)->vfs_force_shutdown)(next, fl, file, line));
 186 }
 187
 188 void
 189 vfs_freeze(
 190         struct bhv_desc         *bdp)
 191 {
 192         struct bhv_desc         *next = bdp;
 193
 194         ASSERT(next);
 195         while (! (bhvtovfsops(next))->vfs_freeze)
 196                 next = BHV_NEXT(next);
 197         ((*bhvtovfsops(next)->vfs_freeze)(next));
 198 }
 199
 200 bhv_vfs_t *
 201 vfs_allocate(
 202         struct super_block      *sb)
 203 {
 204         struct bhv_vfs          *vfsp;
 205
 206         vfsp = kmem_zalloc(sizeof(bhv_vfs_t), KM_SLEEP);
 207         INIT_LIST_HEAD(&vfsp->vfs_sync_list);
 208         spin_lock_init(&vfsp->vfs_sync_lock);
 209         init_waitqueue_head(&vfsp->vfs_wait_single_sync_task);
 210
 211         vfsp->vfs_super = sb;
 212         sb->s_fs_info = vfsp;
 213
 214         if (sb->s_flags & MS_RDONLY)
 215                 vfsp->vfs_flag |= VFS_RDONLY;
 216
 217         return vfsp;
 218 }
 219
 220 bhv_vfs_t *
 221 vfs_from_sb(
 222         struct super_block      *sb)
 223 {
 224         return (bhv_vfs_t *)sb->s_fs_info;
 225 }
 226
 227 void
 228 vfs_deallocate(
 229         struct bhv_vfs          *vfsp)
 230 {
 231         kmem_free(vfsp, sizeof(bhv_vfs_t));
 232 }