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
155struct 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
195struct 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
210struct 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 */