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 */ 221