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 #if __BITS_PER_LONG == 32 || defined(__KERNEL__) 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 /* __BITS_PER_LONG == 32 || defined(__KERNEL__) */ 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 /* 185 * LOCK_MAND support has been removed from the kernel. We leave the symbols 186 * here to not break legacy builds, but these should not be used in new code. 187 */ 188 #define LOCK_MAND 32 /* This is a mandatory flock ... */ 189 #define LOCK_READ 64 /* which allows concurrent read operations */ 190 #define LOCK_WRITE 128 /* which allows concurrent write operations */ 191 #define LOCK_RW 192 /* which allows concurrent read & write ops */ 192 193 #define F_LINUX_SPECIFIC_BASE 1024 194 195 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 }; 219 220 #endif /* _ASM_GENERIC_FCNTL_H */ 221