1/* $NetBSD: linux32_fcntl.c,v 1.10 2014/05/17 09:30:07 njoly 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_fcntl.c,v 1.10 2014/05/17 09:30:07 njoly Exp $");
37
38#include <sys/types.h>
39#include <sys/param.h>
40#include <sys/signal.h>
41#include <sys/fcntl.h>
42#include <sys/filedesc.h>
43
44#include <machine/types.h>
45
46#include <sys/syscallargs.h>
47
48#include <compat/netbsd32/netbsd32.h>
49#include <compat/netbsd32/netbsd32_syscallargs.h>
50
51#include <compat/linux/common/linux_types.h>
52#include <compat/linux/common/linux_fcntl.h>
53#include <compat/linux/common/linux_machdep.h>
54#include <compat/linux/common/linux_misc.h>
55#include <compat/linux/common/linux_ipc.h>
56#include <compat/linux/common/linux_sem.h>
57#include <compat/linux/linux_syscallargs.h>
58
59#include <compat/linux32/common/linux32_types.h>
60#include <compat/linux32/common/linux32_signal.h>
61#include <compat/linux32/common/linux32_machdep.h>
62#include <compat/linux32/linux32_syscallargs.h>
63
64struct linux32_flock {
65 short l_type;
66 short l_whence;
67 int32_t l_start;
68 int32_t l_len;
69 linux_pid_t l_pid;
70};
71
72struct linux32_flock64 {
73 short l_type;
74 short l_whence;
75 netbsd32_int64 l_start;
76 netbsd32_int64 l_len;
77 linux_pid_t l_pid;
78};
79
80conv_linux_flock(linux32, flock)
81conv_linux_flock(linux32, flock64)
82
83int
84linux32_sys_open(struct lwp *l, const struct linux32_sys_open_args *uap, register_t *retval)
85{
86 /* {
87 syscallarg(const netbsd32_charp) path;
88 syscallarg(int) flags;
89 syscallarg(int) mode;
90 } */
91 struct linux_sys_open_args ua;
92
93 NETBSD32TOP_UAP(path, const char);
94 NETBSD32TO64_UAP(flags);
95 NETBSD32TO64_UAP(mode);
96
97 return linux_sys_open(l, &ua, retval);
98}
99
100/*
101 * The linux support for 64bit file offsets introduced both an fcntl64()
102 * function and LINUX_F_SETLK64 (et al), however the fcntl64() function
103 * can still be passed LINUX_F_GETLK (etc).
104 * In practice this means that the two functions are identical!
105 *
106 * We have to intercept both sets of locking primitives because the
107 * structure layout of the 64bit version differs from that on amd64 due
108 * to extra padding because the alignment constraint for int64_t differs.
109 */
110
111int
112linux32_sys_fcntl(struct lwp *l, const struct linux32_sys_fcntl_args *uap, register_t *retval)
113{
114 /* {
115 syscallarg(int) fd;
116 syscallarg(int) cmd;
117 syscallarg(netbsd32_voidp) arg;
118 } */
119 struct linux_sys_fcntl_args ua;
120 int cmd = SCARG(uap, cmd);
121
122 switch (cmd) {
123 case LINUX_F_GETLK64:
124 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
125 linux32, flock64);
126 case LINUX_F_SETLK64:
127 case LINUX_F_SETLKW64:
128 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
129 linux32, flock64, LINUX_F_SETLK64);
130 case LINUX_F_GETLK:
131 do_linux_getlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
132 linux32, flock);
133 case LINUX_F_SETLK:
134 case LINUX_F_SETLKW:
135 do_linux_setlk(SCARG(uap, fd), cmd, SCARG_P32(uap, arg),
136 linux32, flock, LINUX_F_SETLK);
137 default:
138 break;
139 }
140
141 NETBSD32TO64_UAP(fd);
142 SCARG(&ua, cmd) = cmd;
143 NETBSD32TOP_UAP(arg, void);
144
145 return linux_sys_fcntl(l, &ua, retval);
146}
147
148int
149linux32_sys_fadvise64(struct lwp *l,
150 const struct linux32_sys_fadvise64_args *uap, register_t *retval)
151{
152 /* {
153 syscallarg(int) fd;
154 syscallarg(uint32_t) offlo;
155 syscallarg(uint32_t) offhi;
156 syscallarg(netbsd32_size_t) len;
157 syscallarg(int) advice;
158 } */
159 off_t off = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo);
160
161 return do_posix_fadvise(SCARG(uap, fd), off,
162 SCARG(uap, len), linux_to_bsd_posix_fadv(SCARG(uap, advice)));
163}
164
165int
166linux32_sys_fadvise64_64(struct lwp *l,
167 const struct linux32_sys_fadvise64_64_args *uap, register_t *retval)
168{
169 /* {
170 syscallarg(int) fd;
171 syscallarg(uint32_t) offlo;
172 syscallarg(uint32_t) offhi;
173 syscallarg(uint32_t) lenlo;
174 syscallarg(uint32_t) lenhi;
175 syscallarg(int) advice;
176 } */
177 off_t off = ((off_t)SCARG(uap, offhi) << 32) + SCARG(uap, offlo);
178 off_t len = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo);
179
180 return do_posix_fadvise(SCARG(uap, fd), off,
181 len, linux_to_bsd_posix_fadv(SCARG(uap, advice)));
182}
183