Home | History | Annotate | Line # | Download | only in ffs
ffs_quota2.c revision 1.4 
      1 /* $NetBSD: ffs_quota2.c,v 1.4 2011/06/12 03:36:00 rmind 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 1.4 2011/06/12 03:36:00 rmind 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/proc.h>
     37 #include <sys/vnode.h>
     38 #include <sys/mount.h>
     39 #include <sys/kauth.h>
     40 
     41 #include <ufs/ufs/quota2.h>
     42 #include <ufs/ufs/inode.h>
     43 #include <ufs/ufs/ufsmount.h>
     44 #include <ufs/ffs/ffs_extern.h>
     45 #include <ufs/ffs/fs.h>
     46 
     47 
     48 int
     49 ffs_quota2_mount(struct mount *mp)
     50 {
     51 	struct ufsmount *ump = VFSTOUFS(mp);
     52 	struct fs *fs = ump->um_fs;
     53 	int error = 0;
     54 	struct vnode *vp;
     55 	struct lwp *l = curlwp;
     56 
     57 	if ((fs->fs_flags & FS_DOQUOTA2) == 0)
     58 		return 0;
     59 
     60 	ump->um_flags |= UFS_QUOTA2;
     61 	ump->umq2_bsize = fs->fs_bsize;
     62 	ump->umq2_bmask = fs->fs_qbmask;
     63 	if (fs->fs_quota_magic != Q2_HEAD_MAGIC) {
     64 		printf("%s: Invalid quota magic number\n",
     65 		    mp->mnt_stat.f_mntonname);
     66 		return EINVAL;
     67 	}
     68         if ((fs->fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA)) &&
     69             fs->fs_quotafile[USRQUOTA] == 0) {
     70                 printf("%s: no user quota inode\n",
     71 		    mp->mnt_stat.f_mntonname);
     72                 error = EINVAL;
     73         }
     74         if ((fs->fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA)) &&
     75             fs->fs_quotafile[GRPQUOTA] == 0) {
     76                 printf("%s: no group quota inode\n",
     77 		    mp->mnt_stat.f_mntonname);
     78                 error = EINVAL;
     79         }
     80 	if (error)
     81 		return error;
     82 
     83         if (fs->fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA) &&
     84 	    ump->um_quotas[USRQUOTA] == NULLVP) {
     85 		error = VFS_VGET(mp, fs->fs_quotafile[USRQUOTA], &vp);
     86 		if (error) {
     87 			printf("%s: can't vget() user quota inode: %d\n",
     88 			    mp->mnt_stat.f_mntonname, error);
     89 			return error;
     90 		}
     91 		ump->um_quotas[USRQUOTA] = vp;
     92 		ump->um_cred[USRQUOTA] = l->l_cred;
     93 		mutex_enter(vp->v_interlock);
     94 		vp->v_writecount++;
     95 		mutex_exit(vp->v_interlock);
     96 		VOP_UNLOCK(vp);
     97 	}
     98         if (fs->fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA) &&
     99 	    ump->um_quotas[GRPQUOTA] == NULLVP) {
    100 		error = VFS_VGET(mp, fs->fs_quotafile[GRPQUOTA], &vp);
    101 		if (error) {
    102 			vn_close(ump->um_quotas[USRQUOTA],
    103 			    FREAD|FWRITE, l->l_cred);
    104 			printf("%s: can't vget() group quota inode: %d\n",
    105 			    mp->mnt_stat.f_mntonname, error);
    106 			return error;
    107 		}
    108 		ump->um_quotas[GRPQUOTA] = vp;
    109 		ump->um_cred[GRPQUOTA] = l->l_cred;
    110 		mutex_enter(vp->v_interlock);
    111 		vp->v_vflag |= VV_SYSTEM;
    112 		vp->v_writecount++;
    113 		mutex_exit(vp->v_interlock);
    114 		VOP_UNLOCK(vp);
    115 	}
    116 	mp->mnt_flag |= MNT_QUOTA;
    117 	return 0;
    118 }
    119