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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  #define O_TMPFILE_MASK (__O_TMPFILE | O_DIRECTORY | O_CREAT)
95  
96  #ifndef O_NDELAY
97  #define O_NDELAY	O_NONBLOCK
98  #endif
99  
100  #define F_DUPFD		0	/* dup */
101  #define F_GETFD		1	/* get close_on_exec */
102  #define F_SETFD		2	/* set/clear close_on_exec */
103  #define F_GETFL		3	/* get file->f_flags */
104  #define F_SETFL		4	/* set file->f_flags */
105  #ifndef F_GETLK
106  #define F_GETLK		5
107  #define F_SETLK		6
108  #define F_SETLKW	7
109  #endif
110  #ifndef F_SETOWN
111  #define F_SETOWN	8	/* for sockets. */
112  #define F_GETOWN	9	/* for sockets. */
113  #endif
114  #ifndef F_SETSIG
115  #define F_SETSIG	10	/* for sockets. */
116  #define F_GETSIG	11	/* for sockets. */
117  #endif
118  
119  #ifndef CONFIG_64BIT
120  #ifndef F_GETLK64
121  #define F_GETLK64	12	/*  using 'struct flock64' */
122  #define F_SETLK64	13
123  #define F_SETLKW64	14
124  #endif
125  #endif
126  
127  #ifndef F_SETOWN_EX
128  #define F_SETOWN_EX	15
129  #define F_GETOWN_EX	16
130  #endif
131  
132  #ifndef F_GETOWNER_UIDS
133  #define F_GETOWNER_UIDS	17
134  #endif
135  
136  /*
137   * Open File Description Locks
138   *
139   * Usually record locks held by a process are released on *any* close and are
140   * not inherited across a fork().
141   *
142   * These cmd values will set locks that conflict with process-associated
143   * record  locks, but are "owned" by the open file description, not the
144   * process. This means that they are inherited across fork() like BSD (flock)
145   * locks, and they are only released automatically when the last reference to
146   * the the open file against which they were acquired is put.
147   */
148  #define F_OFD_GETLK	36
149  #define F_OFD_SETLK	37
150  #define F_OFD_SETLKW	38
151  
152  #define F_OWNER_TID	0
153  #define F_OWNER_PID	1
154  #define F_OWNER_PGRP	2
155  
156  struct f_owner_ex {
157  	int	type;
158  	__kernel_pid_t	pid;
159  };
160  
161  /* for F_[GET|SET]FL */
162  #define FD_CLOEXEC	1	/* actually anything with low bit set goes */
163  
164  /* for posix fcntl() and lockf() */
165  #ifndef F_RDLCK
166  #define F_RDLCK		0
167  #define F_WRLCK		1
168  #define F_UNLCK		2
169  #endif
170  
171  /* for old implementation of bsd flock () */
172  #ifndef F_EXLCK
173  #define F_EXLCK		4	/* or 3 */
174  #define F_SHLCK		8	/* or 4 */
175  #endif
176  
177  /* operations for bsd flock(), also used by the kernel implementation */
178  #define LOCK_SH		1	/* shared lock */
179  #define LOCK_EX		2	/* exclusive lock */
180  #define LOCK_NB		4	/* or'd with one of the above to prevent
181  				   blocking */
182  #define LOCK_UN		8	/* remove lock */
183  
184  #define LOCK_MAND	32	/* This is a mandatory flock ... */
185  #define LOCK_READ	64	/* which allows concurrent read operations */
186  #define LOCK_WRITE	128	/* which allows concurrent write operations */
187  #define LOCK_RW		192	/* which allows concurrent read & write ops */
188  
189  #define F_LINUX_SPECIFIC_BASE	1024
190  
191  #ifndef HAVE_ARCH_STRUCT_FLOCK
192  #ifndef __ARCH_FLOCK_PAD
193  #define __ARCH_FLOCK_PAD
194  #endif
195  
196  struct flock {
197  	short	l_type;
198  	short	l_whence;
199  	__kernel_off_t	l_start;
200  	__kernel_off_t	l_len;
201  	__kernel_pid_t	l_pid;
202  	__ARCH_FLOCK_PAD
203  };
204  #endif
205  
206  #ifndef HAVE_ARCH_STRUCT_FLOCK64
207  #ifndef __ARCH_FLOCK64_PAD
208  #define __ARCH_FLOCK64_PAD
209  #endif
210  
211  struct flock64 {
212  	short  l_type;
213  	short  l_whence;
214  	__kernel_loff_t l_start;
215  	__kernel_loff_t l_len;
216  	__kernel_pid_t  l_pid;
217  	__ARCH_FLOCK64_PAD
218  };
219  #endif
220  
221  #endif /* _ASM_GENERIC_FCNTL_H */
222