1 | /* $NetBSD: linux_fcntl.h,v 1.17 2015/03/01 13:19:39 njoly Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Frank van der Linden and Eric Haszlakiewicz. |
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 | |
32 | #ifndef _LINUX_FCNTL_H |
33 | #define _LINUX_FCNTL_H |
34 | |
35 | /* |
36 | * The arguments in the flock structure have a different order from the |
37 | * BSD structure. |
38 | */ |
39 | |
40 | /* read/write mode for open(2) */ |
41 | #define LINUX_O_RDONLY 0x0000 |
42 | #define LINUX_O_WRONLY 0x0001 |
43 | #define LINUX_O_RDWR 0x0002 |
44 | #define LINUX_O_ACCMODE 0x0003 |
45 | |
46 | #define LINUX_AT_FDCWD -100 |
47 | #define LINUX_AT_SYMLINK_NOFOLLOW 0x0100 |
48 | #define LINUX_AT_REMOVEDIR 0x0200 |
49 | #define LINUX_AT_SYMLINK_FOLLOW 0x0400 |
50 | #define LINUX_AT_NO_AUTOMOUNT 0x0800 |
51 | #define LINUX_AT_EMPTY_PATH 0x1000 |
52 | |
53 | int linux_to_bsd_ioflags(int); |
54 | int linux_to_bsd_atflags(int); |
55 | |
56 | struct linux_flock { |
57 | short l_type; |
58 | short l_whence; |
59 | linux_off_t l_start; |
60 | linux_off_t l_len; |
61 | linux_pid_t l_pid; |
62 | }; |
63 | |
64 | struct linux_flock64 { |
65 | short l_type; |
66 | short l_whence; |
67 | off_t l_start; |
68 | off_t l_len; |
69 | linux_pid_t l_pid; |
70 | }; |
71 | |
72 | #if defined(__i386__) |
73 | #include <compat/linux/arch/i386/linux_fcntl.h> |
74 | #elif defined(__m68k__) |
75 | #include <compat/linux/arch/m68k/linux_fcntl.h> |
76 | #elif defined(__alpha__) |
77 | #include <compat/linux/arch/alpha/linux_fcntl.h> |
78 | #elif defined(__powerpc__) |
79 | #include <compat/linux/arch/powerpc/linux_fcntl.h> |
80 | #elif defined(__mips__) |
81 | #include <compat/linux/arch/mips/linux_fcntl.h> |
82 | #elif defined(__arm__) |
83 | #include <compat/linux/arch/arm/linux_fcntl.h> |
84 | #elif defined(__amd64__) |
85 | #include <compat/linux/arch/amd64/linux_fcntl.h> |
86 | #else |
87 | #error Undefined linux_fcntl.h machine type. |
88 | #endif |
89 | |
90 | /* Linux specific fcntl(2) commands */ |
91 | #define LINUX_F_SPECIFIC_BASE 1024 |
92 | #define LINUX_F_SETLEASE (LINUX_F_SPECIFIC_BASE + 0) |
93 | #define LINUX_F_GETLEASE (LINUX_F_SPECIFIC_BASE + 1) |
94 | #define LINUX_F_NOTIFY (LINUX_F_SPECIFIC_BASE + 2) |
95 | #define LINUX_F_CANCELLK (LINUX_F_SPECIFIC_BASE + 5) |
96 | #define LINUX_F_DUPFD_CLOEXEC (LINUX_F_SPECIFIC_BASE + 6) |
97 | #define LINUX_F_SETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 7) |
98 | #define LINUX_F_GETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 8) |
99 | |
100 | /* |
101 | * We have to have 4 copies of the code that converts linux fcntl() file |
102 | * locking to native form because there are 4 layouts for the structures. |
103 | * To avoid replicating code, these defines are used. |
104 | * |
105 | * The next two functions take care of converting the flock |
106 | * structure back and forth between Linux and NetBSD format. |
107 | * The only difference in the structures is the order and size of |
108 | * the fields, and the 'whence' value. |
109 | */ |
110 | |
111 | #define conv_linux_flock(LINUX, FLOCK) \ |
112 | static void \ |
113 | bsd_to_##LINUX##_##FLOCK(struct LINUX##_##FLOCK *lfp, const struct flock *bfp) \ |
114 | copy_flock(lfp, LINUX_F, bfp, F) \ |
115 | \ |
116 | static void \ |
117 | LINUX##_to_bsd_##FLOCK(struct flock *bfp, const struct LINUX##_##FLOCK *lfp) \ |
118 | copy_flock(bfp, F, lfp, LINUX_F) |
119 | |
120 | #define copy_flock(dst, dst_f, src, src_f) { \ |
121 | dst->l_start = src->l_start; \ |
122 | dst->l_len = src->l_len; \ |
123 | dst->l_pid = src->l_pid; \ |
124 | dst->l_whence = src->l_whence; \ |
125 | switch (src->l_type) { \ |
126 | case src_f##_RDLCK: \ |
127 | dst->l_type = dst_f##_RDLCK; \ |
128 | break; \ |
129 | case src_f##_UNLCK: \ |
130 | dst->l_type = dst_f##_UNLCK; \ |
131 | break; \ |
132 | case src_f##_WRLCK: \ |
133 | dst->l_type = dst_f##_WRLCK; \ |
134 | break; \ |
135 | } \ |
136 | } |
137 | |
138 | /* |
139 | * These two defines do the work within the sys_fcntl() switch statement. |
140 | */ |
141 | |
142 | #define do_linux_getlk(fd, cmd, arg, LINUX, FLOCK) do { \ |
143 | struct LINUX##_##FLOCK lfl; \ |
144 | struct flock bfl; \ |
145 | int fl_error; \ |
146 | if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ |
147 | return fl_error; \ |
148 | LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ |
149 | fl_error = do_fcntl_lock(fd, F_GETLK, &bfl); \ |
150 | if (fl_error) \ |
151 | return fl_error; \ |
152 | bsd_to_##LINUX##_##FLOCK(&lfl, &bfl); \ |
153 | return copyout(&lfl, arg, sizeof lfl); \ |
154 | } while (0) |
155 | |
156 | #define do_linux_setlk(fd, cmd, arg, LINUX, FLOCK, setlk) do { \ |
157 | struct LINUX##_##FLOCK lfl; \ |
158 | struct flock bfl; \ |
159 | int fl_error; \ |
160 | if ((fl_error = copyin(arg, &lfl, sizeof lfl))) \ |
161 | return fl_error; \ |
162 | LINUX##_to_bsd_##FLOCK(&bfl, &lfl); \ |
163 | return do_fcntl_lock(fd, cmd == setlk ? F_SETLK : F_SETLKW, &bfl); \ |
164 | } while (0) |
165 | |
166 | |
167 | #endif /* !_LINUX_FCNTL_H */ |
168 | |