1 /*        $NetBSD: linux32_resource.c,v 1.13 2021/12/02 04:29:49 ryo Exp $ */
2 
3 /*-
4  * Copyright (c) 2006 Emmanuel Dreyfus, 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  * 3. All advertising materials mentioning features or use of this software
15  *    must display the following acknowledgement:
16  *        This product includes software developed by Emmanuel Dreyfus
17  * 4. The name of the author may not be used to endorse or promote
18  *    products derived from this software without specific prior written
19  *    permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31  * POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 #include <sys/cdefs.h>
35 
36 __KERNEL_RCSID(0, "$NetBSD: linux32_resource.c,v 1.13 2021/12/02 04:29:49 ryo Exp $");
37 
38 #include <sys/types.h>
39 #include <sys/param.h>
40 #include <sys/fstypes.h>
41 #include <sys/signal.h>
42 #include <sys/dirent.h>
43 #include <sys/kernel.h>
44 #include <sys/fcntl.h>
45 #include <sys/select.h>
46 #include <sys/proc.h>
47 #include <sys/resourcevar.h>
48 #include <sys/ucred.h>
49 #include <sys/swap.h>
50 
51 #include <machine/types.h>
52 
53 #include <sys/syscallargs.h>
54 
55 #include <compat/netbsd32/netbsd32.h>
56 #include <compat/netbsd32/netbsd32_conv.h>
57 #include <compat/netbsd32/netbsd32_syscallargs.h>
58 
59 #include <compat/linux/common/linux_types.h>
60 #include <compat/linux/common/linux_signal.h>
61 #include <compat/linux/common/linux_machdep.h>
62 #include <compat/linux/common/linux_misc.h>
63 #include <compat/linux/common/linux_limit.h>
64 #include <compat/linux/common/linux_oldolduname.h>
65 #include <compat/linux/common/linux_ipc.h>
66 #include <compat/linux/common/linux_sem.h>
67 #include <compat/linux/linux_syscallargs.h>
68 
69 #include <compat/linux32/common/linux32_types.h>
70 #include <compat/linux32/common/linux32_signal.h>
71 #include <compat/linux32/common/linux32_machdep.h>
72 #include <compat/linux32/common/linux32_sysctl.h>
73 #include <compat/linux32/common/linux32_socketcall.h>
74 #include <compat/linux32/linux32_syscallargs.h>
75 
76 int
linux32_sys_getrlimit(struct lwp * l,const struct linux32_sys_getrlimit_args * uap,register_t * retval)77 linux32_sys_getrlimit(struct lwp *l, const struct linux32_sys_getrlimit_args *uap, register_t *retval)
78 {
79           /* {
80                     syscallarg(int) which;
81                     syscallarg(netbsd32_orlimitp_t) rlp;
82           } */
83           struct orlimit orl;
84           int which;
85 
86           which = linux_to_bsd_limit(SCARG(uap, which));
87           if (which < 0)
88                     return -which;
89 
90           memset(&orl, 0, sizeof(orl));
91           bsd_to_linux_rlimit(&orl, &l->l_proc->p_rlimit[which]);
92 
93           return copyout(&orl, SCARG_P32(uap, rlp), sizeof(orl));
94 }
95 
96 int
linux32_sys_setrlimit(struct lwp * l,const struct linux32_sys_setrlimit_args * uap,register_t * retval)97 linux32_sys_setrlimit(struct lwp *l, const struct linux32_sys_setrlimit_args *uap, register_t *retval)
98 {
99           /* {
100                     syscallarg(int) which;
101                     syscallarg(netbsd32_orlimitp_t) rlp;
102           } */
103           struct rlimit rl;
104           struct orlimit orl;
105           int error;
106           int which;
107 
108           if ((error = copyin(SCARG_P32(uap, rlp), &orl, sizeof(orl))) != 0)
109                     return error;
110 
111           which = linux_to_bsd_limit(SCARG(uap, which));
112           if (which < 0)
113                     return -which;
114 
115           linux32_to_bsd_rlimit(&rl, &orl);
116 
117           return dosetrlimit(l, l->l_proc, which, &rl);
118 }
119 
120 int
linux32_sys_ugetrlimit(struct lwp * l,const struct linux32_sys_ugetrlimit_args * uap,register_t * retval)121 linux32_sys_ugetrlimit(struct lwp *l, const struct linux32_sys_ugetrlimit_args *uap, register_t *retval)
122 {
123           return linux32_sys_getrlimit(l, (const void *)uap, retval);
124 }
125 
126 int
linux32_sys_prlimit64(struct lwp * l,const struct linux32_sys_prlimit64_args * uap,register_t * retval)127 linux32_sys_prlimit64(struct lwp *l, const struct linux32_sys_prlimit64_args *uap, register_t *retval)
128 {
129           /* {
130                     syscallarg(pid_t) pid;
131                     syscallarg(int) which;
132                     syscallarg(netbsd32_rlimitp_t) new_rlp;
133                     syscallarg(netbsd32_rlimitp_t) old_rlp;
134           }; */
135           struct rlimit rl, nrl, orl;
136           struct rlimit *p;
137           int which;
138           int error;
139 
140           /* XXX: Cannot operate any process other than its own */
141           if (SCARG(uap, pid) != 0)
142                     return EPERM;
143 
144           which = linux_to_bsd_limit(SCARG(uap, which));
145           if (which < 0)
146                     return -which;
147 
148           p = SCARG_P32(uap, old_rlp);
149           if (p != NULL) {
150                     memset(&orl, 0, sizeof(orl));
151                     bsd_to_linux_rlimit64(&orl, &l->l_proc->p_rlimit[which]);
152                     if ((error = copyout(&orl, p, sizeof(orl))) != 0)
153                               return error;
154           }
155 
156           p = SCARG_P32(uap, new_rlp);
157           if (p != NULL) {
158                     if ((error = copyin(p, &nrl, sizeof(nrl))) != 0)
159                               return error;
160 
161                     linux_to_bsd_rlimit(&rl, &nrl);
162                     return dosetrlimit(l, l->l_proc, which, &rl);
163           }
164 
165           return 0;
166 }
167 
168 int
linux32_sys_getpriority(struct lwp * l,const struct linux32_sys_getpriority_args * uap,register_t * retval)169 linux32_sys_getpriority(struct lwp *l, const struct linux32_sys_getpriority_args *uap, register_t *retval)
170 {
171           /* {
172                     syscallarg(int) which;
173                     syscallarg(int) who;
174           } */
175           struct sys_getpriority_args bsa;
176           int error;
177 
178           SCARG(&bsa, which) = SCARG(uap, which);
179           SCARG(&bsa, who) = SCARG(uap, who);
180 
181           if ((error = sys_getpriority(l, &bsa, retval)))
182                     return error;
183 
184           *retval = NZERO - *retval;
185 
186           return 0;
187 }
188