minix/sys/ufs/ffs/ffs_quota2.c

119 lines
3.9 KiB
C
Raw Normal View History

/* $NetBSD: ffs_quota2.c,v 1.4 2011/06/12 03:36:00 rmind Exp $ */
/*-
* Copyright (c) 2010 Manuel Bouyer
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ffs_quota2.c,v 1.4 2011/06/12 03:36:00 rmind Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/file.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/kauth.h>
#include <ufs/ufs/quota2.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ffs/ffs_extern.h>
#include <ufs/ffs/fs.h>
int
ffs_quota2_mount(struct mount *mp)
{
struct ufsmount *ump = VFSTOUFS(mp);
struct fs *fs = ump->um_fs;
int error = 0;
struct vnode *vp;
struct lwp *l = curlwp;
if ((fs->fs_flags & FS_DOQUOTA2) == 0)
return 0;
ump->um_flags |= UFS_QUOTA2;
ump->umq2_bsize = fs->fs_bsize;
ump->umq2_bmask = fs->fs_qbmask;
if (fs->fs_quota_magic != Q2_HEAD_MAGIC) {
printf("%s: Invalid quota magic number\n",
mp->mnt_stat.f_mntonname);
return EINVAL;
}
if ((fs->fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA)) &&
fs->fs_quotafile[USRQUOTA] == 0) {
printf("%s: no user quota inode\n",
mp->mnt_stat.f_mntonname);
error = EINVAL;
}
if ((fs->fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA)) &&
fs->fs_quotafile[GRPQUOTA] == 0) {
printf("%s: no group quota inode\n",
mp->mnt_stat.f_mntonname);
error = EINVAL;
}
if (error)
return error;
if (fs->fs_quota_flags & FS_Q2_DO_TYPE(USRQUOTA) &&
ump->um_quotas[USRQUOTA] == NULLVP) {
error = VFS_VGET(mp, fs->fs_quotafile[USRQUOTA], &vp);
if (error) {
printf("%s: can't vget() user quota inode: %d\n",
mp->mnt_stat.f_mntonname, error);
return error;
}
ump->um_quotas[USRQUOTA] = vp;
ump->um_cred[USRQUOTA] = l->l_cred;
mutex_enter(vp->v_interlock);
vp->v_writecount++;
mutex_exit(vp->v_interlock);
VOP_UNLOCK(vp);
}
if (fs->fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA) &&
ump->um_quotas[GRPQUOTA] == NULLVP) {
error = VFS_VGET(mp, fs->fs_quotafile[GRPQUOTA], &vp);
if (error) {
vn_close(ump->um_quotas[USRQUOTA],
FREAD|FWRITE, l->l_cred);
printf("%s: can't vget() group quota inode: %d\n",
mp->mnt_stat.f_mntonname, error);
return error;
}
ump->um_quotas[GRPQUOTA] = vp;
ump->um_cred[GRPQUOTA] = l->l_cred;
mutex_enter(vp->v_interlock);
vp->v_vflag |= VV_SYSTEM;
vp->v_writecount++;
mutex_exit(vp->v_interlock);
VOP_UNLOCK(vp);
}
mp->mnt_flag |= MNT_QUOTA;
return 0;
}