1 /* $NetBSD: ffs_quota2.c,v 1.7 2020/01/17 20:08:10 ad 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 1.7 2020/01/17 20:08:10 ad 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
ffs_quota2_mount(struct mount * mp)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],
82 LK_EXCLUSIVE, &vp);
83 if (error) {
84 printf("%s: can't vget() user quota inode: %d\n",
85 mp->mnt_stat.f_mntonname, error);
86 return error;
87 }
88 ump->um_quotas[USRQUOTA] = vp;
89 ump->um_cred[USRQUOTA] = l->l_cred;
90 mutex_enter(vp->v_interlock);
91 vp->v_writecount++;
92 mutex_exit(vp->v_interlock);
93 VOP_UNLOCK(vp);
94 }
95 if (fs->fs_quota_flags & FS_Q2_DO_TYPE(GRPQUOTA) &&
96 ump->um_quotas[GRPQUOTA] == NULLVP) {
97 error = VFS_VGET(mp, fs->fs_quotafile[GRPQUOTA],
98 LK_EXCLUSIVE, &vp);
99 if (error) {
100 vn_close(ump->um_quotas[USRQUOTA],
101 FREAD|FWRITE, l->l_cred);
102 printf("%s: can't vget() group quota inode: %d\n",
103 mp->mnt_stat.f_mntonname, error);
104 return error;
105 }
106 ump->um_quotas[GRPQUOTA] = vp;
107 ump->um_cred[GRPQUOTA] = l->l_cred;
108 mutex_enter(vp->v_interlock);
109 vp->v_vflag |= VV_SYSTEM;
110 vp->v_writecount++;
111 mutex_exit(vp->v_interlock);
112 VOP_UNLOCK(vp);
113 }
114
115 mp->mnt_flag |= MNT_QUOTA;
116 return 0;
117 }
118