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 */
221