1 /* $NetBSD: compat_50_quota.c,v 1.4 2022/09/21 07:15:24 dholland Exp $ */
2
3 /*-
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: compat_50_quota.c,v 1.4 2022/09/21 07:15:24 dholland Exp $");
33
34 #if defined(_KERNEL_OPT)
35 #include "opt_compat_netbsd.h"
36 #endif
37
38 #include <sys/module.h>
39 #include <sys/namei.h>
40 #include <sys/param.h>
41 #include <sys/quota.h>
42 #include <sys/quotactl.h>
43 #include <sys/systm.h>
44 #include <sys/syscall.h>
45 #include <sys/syscallvar.h>
46 #include <sys/syscallargs.h>
47 #include <sys/vfs_syscalls.h>
48 #include <sys/vnode.h>
49
50 #include <ufs/ufs/quota1.h>
51
52 static const struct syscall_package vfs_syscalls_50_quota_syscalls[] = {
53 { SYS_compat_50_quotactl, 0, (sy_call_t *)compat_50_sys_quotactl },
54 { 0, 0, NULL }
55 };
56
57 /* ARGSUSED */
58 int
compat_50_sys_quotactl(struct lwp * l,const struct compat_50_sys_quotactl_args * uap,register_t * retval)59 compat_50_sys_quotactl(struct lwp *l, const struct compat_50_sys_quotactl_args *uap, register_t *retval)
60 {
61 /* {
62 syscallarg(const char *) path;
63 syscallarg(int) cmd;
64 syscallarg(int) uid;
65 syscallarg(void *) arg;
66 } */
67 struct vnode *vp;
68 struct mount *mp;
69 int q1cmd;
70 int idtype;
71 char *qfile;
72 struct dqblk dqblk;
73 struct quotakey key;
74 struct quotaval blocks, files;
75 struct quotastat qstat;
76 int error;
77
78 error = namei_simple_user(SCARG(uap, path),
79 NSM_FOLLOW_TRYEMULROOT, &vp);
80 if (error != 0)
81 return (error);
82
83 mp = vp->v_mount;
84 q1cmd = SCARG(uap, cmd);
85 idtype = quota_idtype_from_ufs(q1cmd & SUBCMDMASK);
86 if (idtype == -1) {
87 return EINVAL;
88 }
89
90 switch ((q1cmd & ~SUBCMDMASK) >> SUBCMDSHIFT) {
91 case Q_QUOTAON:
92 qfile = PNBUF_GET();
93 error = copyinstr(SCARG(uap, arg), qfile, PATH_MAX, NULL);
94 if (error != 0) {
95 PNBUF_PUT(qfile);
96 break;
97 }
98
99 error = vfs_quotactl_quotaon(mp, idtype, qfile);
100
101 PNBUF_PUT(qfile);
102 break;
103
104 case Q_QUOTAOFF:
105 error = vfs_quotactl_quotaoff(mp, idtype);
106 break;
107
108 case Q_GETQUOTA:
109 key.qk_idtype = idtype;
110 key.qk_id = SCARG(uap, uid);
111
112 key.qk_objtype = QUOTA_OBJTYPE_BLOCKS;
113 error = vfs_quotactl_get(mp, &key, &blocks);
114 if (error) {
115 break;
116 }
117
118 key.qk_objtype = QUOTA_OBJTYPE_FILES;
119 error = vfs_quotactl_get(mp, &key, &files);
120 if (error) {
121 break;
122 }
123
124 quotavals_to_dqblk(&blocks, &files, &dqblk);
125 error = copyout(&dqblk, SCARG(uap, arg), sizeof(dqblk));
126 break;
127
128 case Q_SETQUOTA:
129 error = copyin(SCARG(uap, arg), &dqblk, sizeof(dqblk));
130 if (error) {
131 break;
132 }
133 dqblk_to_quotavals(&dqblk, &blocks, &files);
134
135 key.qk_idtype = idtype;
136 key.qk_id = SCARG(uap, uid);
137
138 key.qk_objtype = QUOTA_OBJTYPE_BLOCKS;
139 error = vfs_quotactl_put(mp, &key, &blocks);
140 if (error) {
141 break;
142 }
143
144 key.qk_objtype = QUOTA_OBJTYPE_FILES;
145 error = vfs_quotactl_put(mp, &key, &files);
146 break;
147
148 case Q_SYNC:
149 /*
150 * not supported but used only to see if quota is supported,
151 * emulate with stat
152 *
153 * XXX should probably be supported
154 */
155 (void)idtype; /* not used */
156
157 error = vfs_quotactl_stat(mp, &qstat);
158 break;
159
160 case Q_SETUSE:
161 default:
162 error = EOPNOTSUPP;
163 break;
164 }
165
166 vrele(vp);
167 return error;
168 }
169
170 MODULE(MODULE_CLASS_EXEC, compat_50_quota, "compat_50,ufs");
171
172 static int
compat_50_quota_modcmd(modcmd_t cmd,void * arg)173 compat_50_quota_modcmd(modcmd_t cmd, void *arg)
174 {
175
176 switch (cmd) {
177 case MODULE_CMD_INIT:
178 return syscall_establish(NULL, vfs_syscalls_50_quota_syscalls);
179 case MODULE_CMD_FINI:
180 return syscall_disestablish(NULL, vfs_syscalls_50_quota_syscalls);
181 default:
182 return ENOTTY;
183 }
184 }
185