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      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 0x1000000
      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_NDELAY
     88 #define O_NDELAY	O_NONBLOCK
     89 #endif
     90 
     91 #define F_DUPFD		0	/* dup */
     92 #define F_GETFD		1	/* get close_on_exec */
     93 #define F_SETFD		2	/* set/clear close_on_exec */
     94 #define F_GETFL		3	/* get file->f_flags */
     95 #define F_SETFL		4	/* set file->f_flags */
     96 #ifndef F_GETLK
     97 #define F_GETLK		5
     98 #define F_SETLK		6
     99 #define F_SETLKW	7
    100 #endif
    101 #ifndef F_SETOWN
    102 #define F_SETOWN	8	/* for sockets. */
    103 #define F_GETOWN	9	/* for sockets. */
    104 #endif
    105 #ifndef F_SETSIG
    106 #define F_SETSIG	10	/* for sockets. */
    107 #define F_GETSIG	11	/* for sockets. */
    108 #endif
    109 
    110 #ifndef CONFIG_64BIT
    111 #ifndef F_GETLK64
    112 #define F_GETLK64	12	/*  using 'struct flock64' */
    113 #define F_SETLK64	13
    114 #define F_SETLKW64	14
    115 #endif
    116 #endif
    117 
    118 #ifndef F_SETOWN_EX
    119 #define F_SETOWN_EX	15
    120 #define F_GETOWN_EX	16
    121 #endif
    122 
    123 #define F_OWNER_TID	0
    124 #define F_OWNER_PID	1
    125 #define F_OWNER_PGRP	2
    126 
    127 struct f_owner_ex {
    128 	int	type;
    129 	__kernel_pid_t	pid;
    130 };
    131 
    132 /* for F_[GET|SET]FL */
    133 #define FD_CLOEXEC	1	/* actually anything with low bit set goes */
    134 
    135 /* for posix fcntl() and lockf() */
    136 #ifndef F_RDLCK
    137 #define F_RDLCK		0
    138 #define F_WRLCK		1
    139 #define F_UNLCK		2
    140 #endif
    141 
    142 /* for old implementation of bsd flock () */
    143 #ifndef F_EXLCK
    144 #define F_EXLCK		4	/* or 3 */
    145 #define F_SHLCK		8	/* or 4 */
    146 #endif
    147 
    148 /* operations for bsd flock(), also used by the kernel implementation */
    149 #define LOCK_SH		1	/* shared lock */
    150 #define LOCK_EX		2	/* exclusive lock */
    151 #define LOCK_NB		4	/* or'd with one of the above to prevent
    152 				   blocking */
    153 #define LOCK_UN		8	/* remove lock */
    154 
    155 #define LOCK_MAND	32	/* This is a mandatory flock ... */
    156 #define LOCK_READ	64	/* which allows concurrent read operations */
    157 #define LOCK_WRITE	128	/* which allows concurrent write operations */
    158 #define LOCK_RW		192	/* which allows concurrent read & write ops */
    159 
    160 #define F_LINUX_SPECIFIC_BASE	1024
    161 
    162 #ifndef HAVE_ARCH_STRUCT_FLOCK
    163 #ifndef __ARCH_FLOCK_PAD
    164 #define __ARCH_FLOCK_PAD
    165 #endif
    166 
    167 struct flock {
    168 	short	l_type;
    169 	short	l_whence;
    170 	__kernel_off_t	l_start;
    171 	__kernel_off_t	l_len;
    172 	__kernel_pid_t	l_pid;
    173 	__ARCH_FLOCK_PAD
    174 };
    175 #endif
    176 
    177 #ifndef CONFIG_64BIT
    178 
    179 #ifndef HAVE_ARCH_STRUCT_FLOCK64
    180 #ifndef __ARCH_FLOCK64_PAD
    181 #define __ARCH_FLOCK64_PAD
    182 #endif
    183 
    184 struct flock64 {
    185 	short  l_type;
    186 	short  l_whence;
    187 	__kernel_loff_t l_start;
    188 	__kernel_loff_t l_len;
    189 	__kernel_pid_t  l_pid;
    190 	__ARCH_FLOCK64_PAD
    191 };
    192 #endif
    193 #endif /* !CONFIG_64BIT */
    194 
    195 #endif /* _ASM_GENERIC_FCNTL_H */
    196