include/uapi/asm-generic/fcntl.h

   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
  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 #if __BITS_PER_LONG == 32 || defined(__KERNEL__)
 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 /* __BITS_PER_LONG == 32 || defined(__KERNEL__) */
 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 /*
 184  * LOCK_MAND support has been removed from the kernel. We leave the symbols
 185  * here to not break legacy builds, but these should not be used in new code.
 186  */
 187 #define LOCK_MAND       32      /* This is a mandatory flock ... */
 188 #define LOCK_READ       64      /* which allows concurrent read operations */
 189 #define LOCK_WRITE      128     /* which allows concurrent write operations */
 190 #define LOCK_RW         192     /* which allows concurrent read & write ops */
 191
 192 #define F_LINUX_SPECIFIC_BASE   1024
 193
 194 #ifndef HAVE_ARCH_STRUCT_FLOCK
 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 #ifdef  __ARCH_FLOCK_EXTRA_SYSID
 202         __ARCH_FLOCK_EXTRA_SYSID
 203 #endif
 204 #ifdef  __ARCH_FLOCK_PAD
 205         __ARCH_FLOCK_PAD
 206 #endif
 207 };
 208
 209 struct flock64 {
 210         short  l_type;
 211         short  l_whence;
 212         __kernel_loff_t l_start;
 213         __kernel_loff_t l_len;
 214         __kernel_pid_t  l_pid;
 215 #ifdef  __ARCH_FLOCK64_PAD
 216         __ARCH_FLOCK64_PAD
 217 #endif
 218 };
 219 #endif /* HAVE_ARCH_STRUCT_FLOCK */
 220
 221 #endif /* _ASM_GENERIC_FCNTL_H */