1 #ifndef _ASM_GENERIC_FCNTL_H
2 #define _ASM_GENERIC_FCNTL_H
3
4 #include <linux/types.h>
5
6 /*
7 * FMODE_EXEC is 0x20
8 * FMODE_NONOTIFY is 0x4000000
9 * These cannot be used by userspace O_* until internal and external open
10 * flags are split.
11 * -Eric Paris
12 */
13
14 /*
15 * When introducing new O_* bits, please check its uniqueness in fcntl_init().
16 */
17
18 #define O_ACCMODE 00000003
19 #define O_RDONLY 00000000
20 #define O_WRONLY 00000001
21 #define O_RDWR 00000002
22 #ifndef O_CREAT
23 #define O_CREAT 00000100 /* not fcntl */
24 #endif
25 #ifndef O_EXCL
26 #define O_EXCL 00000200 /* not fcntl */
27 #endif
28 #ifndef O_NOCTTY
29 #define O_NOCTTY 00000400 /* not fcntl */
30 #endif
31 #ifndef O_TRUNC
32 #define O_TRUNC 00001000 /* not fcntl */
33 #endif
34 #ifndef O_APPEND
35 #define O_APPEND 00002000
36 #endif
37 #ifndef O_NONBLOCK
38 #define O_NONBLOCK 00004000
39 #endif
40 #ifndef O_DSYNC
41 #define O_DSYNC 00010000 /* used to be O_SYNC, see below */
42 #endif
43 #ifndef FASYNC
44 #define FASYNC 00020000 /* fcntl, for BSD compatibility */
45 #endif
46 #ifndef O_DIRECT
47 #define O_DIRECT 00040000 /* direct disk access hint */
48 #endif
49 #ifndef O_LARGEFILE
50 #define O_LARGEFILE 00100000
51 #endif
52 #ifndef O_DIRECTORY
53 #define O_DIRECTORY 00200000 /* must be a directory */
54 #endif
55 #ifndef O_NOFOLLOW
56 #define O_NOFOLLOW 00400000 /* don't follow links */
57 #endif
58 #ifndef O_NOATIME
59 #define O_NOATIME 01000000
60 #endif
61 #ifndef O_CLOEXEC
62 #define O_CLOEXEC 02000000 /* set close_on_exec */
63 #endif
64
65 /*
66 * Before Linux 2.6.33 only O_DSYNC semantics were implemented, but using
67 * the O_SYNC flag. We continue to use the existing numerical value
68 * for O_DSYNC semantics now, but using the correct symbolic name for it.
69 * This new value is used to request true Posix O_SYNC semantics. It is
70 * defined in this strange way to make sure applications compiled against
71 * new headers get at least O_DSYNC semantics on older kernels.
72 *
73 * This has the nice side-effect that we can simply test for O_DSYNC
74 * wherever we do not care if O_DSYNC or O_SYNC is used.
75 *
76 * Note: __O_SYNC must never be used directly.
77 */
78 #ifndef O_SYNC
79 #define __O_SYNC 04000000
80 #define O_SYNC (__O_SYNC|O_DSYNC)
81 #endif
82
83 #ifndef O_PATH
84 #define O_PATH 010000000
85 #endif
86
87 #ifndef __O_TMPFILE
88 #define __O_TMPFILE 020000000
89 #endif
90
91 /* a horrid kludge trying to make sure that this will fail on old kernels */
92 #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY)
93 #define O_TMPFILE_MASK (__O_TMPFILE | O_DIRECTORY | O_CREAT)
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 #ifndef CONFIG_64BIT
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
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 #define LOCK_MAND 32 /* This is a mandatory flock ... */
184 #define LOCK_READ 64 /* which allows concurrent read operations */
185 #define LOCK_WRITE 128 /* which allows concurrent write operations */
186 #define LOCK_RW 192 /* which allows concurrent read & write ops */
187
188 #define F_LINUX_SPECIFIC_BASE 1024
189
190 #ifndef HAVE_ARCH_STRUCT_FLOCK
191 #ifndef __ARCH_FLOCK_PAD
192 #define __ARCH_FLOCK_PAD
193 #endif
194
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 __ARCH_FLOCK_PAD
202 };
203 #endif
204
205 #ifndef HAVE_ARCH_STRUCT_FLOCK64
206 #ifndef __ARCH_FLOCK64_PAD
207 #define __ARCH_FLOCK64_PAD
208 #endif
209
210 struct flock64 {
211 short l_type;
212 short l_whence;
213 __kernel_loff_t l_start;
214 __kernel_loff_t l_len;
215 __kernel_pid_t l_pid;
216 __ARCH_FLOCK64_PAD
217 };
218 #endif
219
220 #endif /* _ASM_GENERIC_FCNTL_H */