1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
2 | #ifndef _ASM_GENERIC_FCNTL_H |
3 | #define _ASM_GENERIC_FCNTL_H |
4 | |
5 | #include <linux/types.h> |
6 | |
7 | /* |
8 | * FMODE_EXEC is 0x20 |
9 | * FMODE_NONOTIFY is 0x4000000 |
10 | * These cannot be used by userspace O_* until internal and external open |
11 | * flags are split. |
12 | * -Eric Paris |
13 | */ |
14 | |
15 | /* |
16 | * When introducing new O_* bits, please check its uniqueness in fcntl_init(). |
17 | */ |
18 | |
19 | #define O_ACCMODE 00000003 |
20 | #define O_RDONLY 00000000 |
21 | #define O_WRONLY 00000001 |
22 | #define O_RDWR 00000002 |
23 | #ifndef O_CREAT |
24 | #define O_CREAT 00000100 /* not fcntl */ |
25 | #endif |
26 | #ifndef O_EXCL |
27 | #define O_EXCL 00000200 /* not fcntl */ |
28 | #endif |
29 | #ifndef O_NOCTTY |
30 | #define O_NOCTTY 00000400 /* not fcntl */ |
31 | #endif |
32 | #ifndef O_TRUNC |
33 | #define O_TRUNC 00001000 /* not fcntl */ |
34 | #endif |
35 | #ifndef O_APPEND |
36 | #define O_APPEND 00002000 |
37 | #endif |
38 | #ifndef O_NONBLOCK |
39 | #define O_NONBLOCK 00004000 |
40 | #endif |
41 | #ifndef O_DSYNC |
42 | #define O_DSYNC 00010000 /* used to be O_SYNC, see below */ |
43 | #endif |
44 | #ifndef FASYNC |
45 | #define FASYNC 00020000 /* fcntl, for BSD compatibility */ |
46 | #endif |
47 | #ifndef O_DIRECT |
48 | #define O_DIRECT 00040000 /* direct disk access hint */ |
49 | #endif |
50 | #ifndef O_LARGEFILE |
51 | #define O_LARGEFILE 00100000 |
52 | #endif |
53 | #ifndef O_DIRECTORY |
54 | #define O_DIRECTORY 00200000 /* must be a directory */ |
55 | #endif |
56 | #ifndef O_NOFOLLOW |
57 | #define O_NOFOLLOW 00400000 /* don't follow links */ |
58 | #endif |
59 | #ifndef O_NOATIME |
60 | #define O_NOATIME 01000000 |
61 | #endif |
62 | #ifndef O_CLOEXEC |
63 | #define O_CLOEXEC 02000000 /* set close_on_exec */ |
64 | #endif |
65 | |
66 | /* |
67 | * Before Linux 2.6.33 only O_DSYNC semantics were implemented, but using |
68 | * the O_SYNC flag. We continue to use the existing numerical value |
69 | * for O_DSYNC semantics now, but using the correct symbolic name for it. |
70 | * This new value is used to request true Posix O_SYNC semantics. It is |
71 | * defined in this strange way to make sure applications compiled against |
72 | * new headers get at least O_DSYNC semantics on older kernels. |
73 | * |
74 | * This has the nice side-effect that we can simply test for O_DSYNC |
75 | * wherever we do not care if O_DSYNC or O_SYNC is used. |
76 | * |
77 | * Note: __O_SYNC must never be used directly. |
78 | */ |
79 | #ifndef O_SYNC |
80 | #define __O_SYNC 04000000 |
81 | #define O_SYNC (__O_SYNC|O_DSYNC) |
82 | #endif |
83 | |
84 | #ifndef O_PATH |
85 | #define O_PATH 010000000 |
86 | #endif |
87 | |
88 | #ifndef __O_TMPFILE |
89 | #define __O_TMPFILE 020000000 |
90 | #endif |
91 | |
92 | /* a horrid kludge trying to make sure that this will fail on old kernels */ |
93 | #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY) |
94 | |
95 | #ifndef O_NDELAY |
96 | #define O_NDELAY O_NONBLOCK |
97 | #endif |
98 | |
99 | #define F_DUPFD 0 /* dup */ |
100 | #define F_GETFD 1 /* get close_on_exec */ |
101 | #define F_SETFD 2 /* set/clear close_on_exec */ |
102 | #define F_GETFL 3 /* get file->f_flags */ |
103 | #define F_SETFL 4 /* set file->f_flags */ |
104 | #ifndef F_GETLK |
105 | #define F_GETLK 5 |
106 | #define F_SETLK 6 |
107 | #define F_SETLKW 7 |
108 | #endif |
109 | #ifndef F_SETOWN |
110 | #define F_SETOWN 8 /* for sockets. */ |
111 | #define F_GETOWN 9 /* for sockets. */ |
112 | #endif |
113 | #ifndef F_SETSIG |
114 | #define F_SETSIG 10 /* for sockets. */ |
115 | #define F_GETSIG 11 /* for sockets. */ |
116 | #endif |
117 | |
118 | #if __BITS_PER_LONG == 32 || defined(__KERNEL__) |
119 | #ifndef F_GETLK64 |
120 | #define F_GETLK64 12 /* using 'struct flock64' */ |
121 | #define F_SETLK64 13 |
122 | #define F_SETLKW64 14 |
123 | #endif |
124 | #endif /* __BITS_PER_LONG == 32 || defined(__KERNEL__) */ |
125 | |
126 | #ifndef F_SETOWN_EX |
127 | #define F_SETOWN_EX 15 |
128 | #define F_GETOWN_EX 16 |
129 | #endif |
130 | |
131 | #ifndef F_GETOWNER_UIDS |
132 | #define F_GETOWNER_UIDS 17 |
133 | #endif |
134 | |
135 | /* |
136 | * Open File Description Locks |
137 | * |
138 | * Usually record locks held by a process are released on *any* close and are |
139 | * not inherited across a fork(). |
140 | * |
141 | * These cmd values will set locks that conflict with process-associated |
142 | * record locks, but are "owned" by the open file description, not the |
143 | * process. This means that they are inherited across fork() like BSD (flock) |
144 | * locks, and they are only released automatically when the last reference to |
145 | * the the open file against which they were acquired is put. |
146 | */ |
147 | #define F_OFD_GETLK 36 |
148 | #define F_OFD_SETLK 37 |
149 | #define F_OFD_SETLKW 38 |
150 | |
151 | #define F_OWNER_TID 0 |
152 | #define F_OWNER_PID 1 |
153 | #define F_OWNER_PGRP 2 |
154 | |
155 | struct f_owner_ex { |
156 | int type; |
157 | __kernel_pid_t pid; |
158 | }; |
159 | |
160 | /* for F_[GET|SET]FL */ |
161 | #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ |
162 | |
163 | /* for posix fcntl() and lockf() */ |
164 | #ifndef F_RDLCK |
165 | #define F_RDLCK 0 |
166 | #define F_WRLCK 1 |
167 | #define F_UNLCK 2 |
168 | #endif |
169 | |
170 | /* for old implementation of bsd flock () */ |
171 | #ifndef F_EXLCK |
172 | #define F_EXLCK 4 /* or 3 */ |
173 | #define F_SHLCK 8 /* or 4 */ |
174 | #endif |
175 | |
176 | /* operations for bsd flock(), also used by the kernel implementation */ |
177 | #define LOCK_SH 1 /* shared lock */ |
178 | #define LOCK_EX 2 /* exclusive lock */ |
179 | #define LOCK_NB 4 /* or'd with one of the above to prevent |
180 | blocking */ |
181 | #define LOCK_UN 8 /* remove lock */ |
182 | |
183 | /* |
184 | * LOCK_MAND support has been removed from the kernel. We leave the symbols |
185 | * here to not break legacy builds, but these should not be used in new code. |
186 | */ |
187 | #define LOCK_MAND 32 /* This is a mandatory flock ... */ |
188 | #define LOCK_READ 64 /* which allows concurrent read operations */ |
189 | #define LOCK_WRITE 128 /* which allows concurrent write operations */ |
190 | #define LOCK_RW 192 /* which allows concurrent read & write ops */ |
191 | |
192 | #define F_LINUX_SPECIFIC_BASE 1024 |
193 | |
194 | #ifndef HAVE_ARCH_STRUCT_FLOCK |
195 | struct flock { |
196 | short l_type; |
197 | short l_whence; |
198 | __kernel_off_t l_start; |
199 | __kernel_off_t l_len; |
200 | __kernel_pid_t l_pid; |
201 | #ifdef __ARCH_FLOCK_EXTRA_SYSID |
202 | __ARCH_FLOCK_EXTRA_SYSID |
203 | #endif |
204 | #ifdef __ARCH_FLOCK_PAD |
205 | __ARCH_FLOCK_PAD |
206 | #endif |
207 | }; |
208 | |
209 | struct flock64 { |
210 | short l_type; |
211 | short l_whence; |
212 | __kernel_loff_t l_start; |
213 | __kernel_loff_t l_len; |
214 | __kernel_pid_t l_pid; |
215 | #ifdef __ARCH_FLOCK64_PAD |
216 | __ARCH_FLOCK64_PAD |
217 | #endif |
218 | }; |
219 | #endif /* HAVE_ARCH_STRUCT_FLOCK */ |
220 | |
221 | #endif /* _ASM_GENERIC_FCNTL_H */ |
222 | |