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 * 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 #ifndef O_EMPTYPATH 92 #define O_EMPTYPATH (1 << 26) /* allow empty path */ 93 #endif 94 95 /* a horrid kludge trying to make sure that this will fail on old kernels */ 96 #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY) 97 98 #ifndef O_NDELAY 99 #define O_NDELAY O_NONBLOCK 100 #endif 101 102 #define F_DUPFD 0 /* dup */ 103 #define F_GETFD 1 /* get close_on_exec */ 104 #define F_SETFD 2 /* set/clear close_on_exec */ 105 #define F_GETFL 3 /* get file->f_flags */ 106 #define F_SETFL 4 /* set file->f_flags */ 107 #ifndef F_GETLK 108 #define F_GETLK 5 109 #define F_SETLK 6 110 #define F_SETLKW 7 111 #endif 112 #ifndef F_SETOWN 113 #define F_SETOWN 8 /* for sockets. */ 114 #define F_GETOWN 9 /* for sockets. */ 115 #endif 116 #ifndef F_SETSIG 117 #define F_SETSIG 10 /* for sockets. */ 118 #define F_GETSIG 11 /* for sockets. */ 119 #endif 120 121 #if __BITS_PER_LONG == 32 || defined(__KERNEL__) 122 #ifndef F_GETLK64 123 #define F_GETLK64 12 /* using 'struct flock64' */ 124 #define F_SETLK64 13 125 #define F_SETLKW64 14 126 #endif 127 #endif /* __BITS_PER_LONG == 32 || defined(__KERNEL__) */ 128 129 #ifndef F_SETOWN_EX 130 #define F_SETOWN_EX 15 131 #define F_GETOWN_EX 16 132 #endif 133 134 #ifndef F_GETOWNER_UIDS 135 #define F_GETOWNER_UIDS 17 136 #endif 137 138 /* 139 * Open File Description Locks 140 * 141 * Usually record locks held by a process are released on *any* close and are 142 * not inherited across a fork(). 143 * 144 * These cmd values will set locks that conflict with process-associated 145 * record locks, but are "owned" by the open file description, not the 146 * process. This means that they are inherited across fork() like BSD (flock) 147 * locks, and they are only released automatically when the last reference to 148 * the the open file against which they were acquired is put. 149 */ 150 #define F_OFD_GETLK 36 151 #define F_OFD_SETLK 37 152 #define F_OFD_SETLKW 38 153 154 #define F_OWNER_TID 0 155 #define F_OWNER_PID 1 156 #define F_OWNER_PGRP 2 157 158 struct f_owner_ex { 159 int type; 160 __kernel_pid_t pid; 161 }; 162 163 /* for F_[GET|SET]FL */ 164 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ 165 166 /* for posix fcntl() and lockf() */ 167 #ifndef F_RDLCK 168 #define F_RDLCK 0 169 #define F_WRLCK 1 170 #define F_UNLCK 2 171 #endif 172 173 /* for old implementation of bsd flock () */ 174 #ifndef F_EXLCK 175 #define F_EXLCK 4 /* or 3 */ 176 #define F_SHLCK 8 /* or 4 */ 177 #endif 178 179 /* operations for bsd flock(), also used by the kernel implementation */ 180 #define LOCK_SH 1 /* shared lock */ 181 #define LOCK_EX 2 /* exclusive lock */ 182 #define LOCK_NB 4 /* or'd with one of the above to prevent 183 blocking */ 184 #define LOCK_UN 8 /* remove lock */ 185 186 /* 187 * LOCK_MAND support has been removed from the kernel. We leave the symbols 188 * here to not break legacy builds, but these should not be used in new code. 189 */ 190 #define LOCK_MAND 32 /* This is a mandatory flock ... */ 191 #define LOCK_READ 64 /* which allows concurrent read operations */ 192 #define LOCK_WRITE 128 /* which allows concurrent write operations */ 193 #define LOCK_RW 192 /* which allows concurrent read & write ops */ 194 195 #define F_LINUX_SPECIFIC_BASE 1024 196 197 #ifndef HAVE_ARCH_STRUCT_FLOCK 198 struct flock { 199 short l_type; 200 short l_whence; 201 __kernel_off_t l_start; 202 __kernel_off_t l_len; 203 __kernel_pid_t l_pid; 204 #ifdef __ARCH_FLOCK_EXTRA_SYSID 205 __ARCH_FLOCK_EXTRA_SYSID 206 #endif 207 #ifdef __ARCH_FLOCK_PAD 208 __ARCH_FLOCK_PAD 209 #endif 210 }; 211 212 struct flock64 { 213 short l_type; 214 short l_whence; 215 __kernel_loff_t l_start; 216 __kernel_loff_t l_len; 217 __kernel_pid_t l_pid; 218 #ifdef __ARCH_FLOCK64_PAD 219 __ARCH_FLOCK64_PAD 220 #endif 221 }; 222 #endif /* HAVE_ARCH_STRUCT_FLOCK */ 223 224 #endif /* _ASM_GENERIC_FCNTL_H */ 225