sys/ufs/ffs/ffs_quota2.c

   1 /* $NetBSD: ffs_quota2.c,v 1.5 2015/02/22 14:12:48 maxv Exp $ */
   2 /*-
   3   * Copyright (c) 2010 Manuel Bouyer
   4   * All rights reserved.
   5   *
   6   * Redistribution and use in source and binary forms, with or without
   7   * modification, are permitted provided that the following conditions
   8   * are met:
   9   * 1. Redistributions of source code must retain the above copyright
  10   *    notice, this list of conditions and the following disclaimer.
  11   * 2. Redistributions in binary form must reproduce the above copyright
  12   *    notice, this list of conditions and the following disclaimer in the
  13   *    documentation and/or other materials provided with the distribution.
  14   *
  15   * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  16   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  17   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  18   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  19   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  20   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  21   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  22   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  23   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  24   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  25   * POSSIBILITY OF SUCH DAMAGE.
  26   */
  27
  28 #include <sys/cdefs.h>
  29 __KERNEL_RCSID(0, "$NetBSD: ffs_quota2.c,v 1.5 2015/02/22 14:12:48 maxv Exp $");
  30
  31 #include <sys/param.h>
  32 #include <sys/kernel.h>
  33 #include <sys/systm.h>
  34 #include <sys/namei.h>
  35 #include <sys/file.h>
  36 #include <sys/vnode.h>
  37 #include <sys/mount.h>
  38 #include <sys/kauth.h>
  39
  40 #include <ufs/ufs/quota2.h>
  41 #include <ufs/ufs/inode.h>
  42 #include <ufs/ufs/ufsmount.h>
  43 #include <ufs/ffs/ffs_extern.h>
  44 #include <ufs/ffs/fs.h>
  45
  46 int
  47 ffs_quota2_mount(struct mount *mp)
  48 {
  49         struct ufsmount *ump = VFSTOUFS(mp);
  50         struct fs *fs = ump->um_fs;
  51         int error;
  52         struct vnode *vp;
  53         struct lwp *l = curlwp;
  54
  55         if ((fs->fs_flags & FS_DOQUOTA2) == 0)
  56                 return 0;
  57
  58         ump->um_flags |= UFS_QUOTA2;
  59         ump->umq2_bsize = fs->fs_bsize;
  60         ump->umq2_bmask = fs->fs_qbmask;
  61         if (fs->fs_quota_magic != Q2_HEAD_MAGIC) {
  62                 printf("%s: invalid quota magic number\n",
  63                     mp->mnt_stat.f_mntonname);
  64                 return EINVAL;
  65         }
  66         if ((fs->fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA)) &&
  67             fs->fs_quotafile[USRQUOTA] == 0) {
  68                 printf("%s: no user quota inode\n",
  69                     mp->mnt_stat.f_mntonname);
  70                 return EINVAL;
  71         }
  72         if ((fs->fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA)) &&
  73             fs->fs_quotafile[GRPQUOTA] == 0) {
  74                 printf("%s: no group quota inode\n",
  75                     mp->mnt_stat.f_mntonname);
  76                 return EINVAL;
  77         }
  78
  79         if (fs->fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA) &&
  80             ump->um_quotas[USRQUOTA] == NULLVP) {
  81                 error = VFS_VGET(mp, fs->fs_quotafile[USRQUOTA], &vp);
  82                 if (error) {
  83                         printf("%s: can't vget() user quota inode: %d\n",
  84                             mp->mnt_stat.f_mntonname, error);
  85                         return error;
  86                 }
  87                 ump->um_quotas[USRQUOTA] = vp;
  88                 ump->um_cred[USRQUOTA] = l->l_cred;
  89                 mutex_enter(vp->v_interlock);
  90                 vp->v_writecount++;
  91                 mutex_exit(vp->v_interlock);
  92                 VOP_UNLOCK(vp);
  93         }
  94         if (fs->fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA) &&
  95             ump->um_quotas[GRPQUOTA] == NULLVP) {
  96                 error = VFS_VGET(mp, fs->fs_quotafile[GRPQUOTA], &vp);
  97                 if (error) {
  98                         vn_close(ump->um_quotas[USRQUOTA],
  99                             FREAD|FWRITE, l->l_cred);
 100                         printf("%s: can't vget() group quota inode: %d\n",
 101                             mp->mnt_stat.f_mntonname, error);
 102                         return error;
 103                 }
 104                 ump->um_quotas[GRPQUOTA] = vp;
 105                 ump->um_cred[GRPQUOTA] = l->l_cred;
 106                 mutex_enter(vp->v_interlock);
 107                 vp->v_vflag |= VV_SYSTEM;
 108                 vp->v_writecount++;
 109                 mutex_exit(vp->v_interlock);
 110                 VOP_UNLOCK(vp);
 111         }
 112
 113         mp->mnt_flag |= MNT_QUOTA;
 114         return 0;
 115 }