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221 lines
5.3 KiB
221 lines
5.3 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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#ifndef _ASM_GENERIC_FCNTL_H |
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#define _ASM_GENERIC_FCNTL_H |
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#include <linux/types.h> |
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/* |
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* FMODE_EXEC is 0x20 |
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* FMODE_NONOTIFY is 0x4000000 |
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* These cannot be used by userspace O_* until internal and external open |
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* flags are split. |
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* -Eric Paris |
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*/ |
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/* |
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* When introducing new O_* bits, please check its uniqueness in fcntl_init(). |
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*/ |
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#define O_ACCMODE 00000003 |
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#define O_RDONLY 00000000 |
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#define O_WRONLY 00000001 |
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#define O_RDWR 00000002 |
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#ifndef O_CREAT |
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#define O_CREAT 00000100 /* not fcntl */ |
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#endif |
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#ifndef O_EXCL |
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#define O_EXCL 00000200 /* not fcntl */ |
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#endif |
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#ifndef O_NOCTTY |
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#define O_NOCTTY 00000400 /* not fcntl */ |
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#endif |
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#ifndef O_TRUNC |
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#define O_TRUNC 00001000 /* not fcntl */ |
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#endif |
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#ifndef O_APPEND |
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#define O_APPEND 00002000 |
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#endif |
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#ifndef O_NONBLOCK |
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#define O_NONBLOCK 00004000 |
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#endif |
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#ifndef O_DSYNC |
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#define O_DSYNC 00010000 /* used to be O_SYNC, see below */ |
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#endif |
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#ifndef FASYNC |
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#define FASYNC 00020000 /* fcntl, for BSD compatibility */ |
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#endif |
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#ifndef O_DIRECT |
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#define O_DIRECT 00040000 /* direct disk access hint */ |
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#endif |
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#ifndef O_LARGEFILE |
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#define O_LARGEFILE 00100000 |
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#endif |
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#ifndef O_DIRECTORY |
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#define O_DIRECTORY 00200000 /* must be a directory */ |
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#endif |
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#ifndef O_NOFOLLOW |
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#define O_NOFOLLOW 00400000 /* don't follow links */ |
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#endif |
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#ifndef O_NOATIME |
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#define O_NOATIME 01000000 |
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#endif |
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#ifndef O_CLOEXEC |
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#define O_CLOEXEC 02000000 /* set close_on_exec */ |
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#endif |
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/* |
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* Before Linux 2.6.33 only O_DSYNC semantics were implemented, but using |
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* the O_SYNC flag. We continue to use the existing numerical value |
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* for O_DSYNC semantics now, but using the correct symbolic name for it. |
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* This new value is used to request true Posix O_SYNC semantics. It is |
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* defined in this strange way to make sure applications compiled against |
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* new headers get at least O_DSYNC semantics on older kernels. |
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* |
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* This has the nice side-effect that we can simply test for O_DSYNC |
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* wherever we do not care if O_DSYNC or O_SYNC is used. |
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* |
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* Note: __O_SYNC must never be used directly. |
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*/ |
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#ifndef O_SYNC |
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#define __O_SYNC 04000000 |
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#define O_SYNC (__O_SYNC|O_DSYNC) |
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#endif |
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#ifndef O_PATH |
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#define O_PATH 010000000 |
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#endif |
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#ifndef __O_TMPFILE |
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#define __O_TMPFILE 020000000 |
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#endif |
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/* a horrid kludge trying to make sure that this will fail on old kernels */ |
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#define O_TMPFILE (__O_TMPFILE | O_DIRECTORY) |
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#define O_TMPFILE_MASK (__O_TMPFILE | O_DIRECTORY | O_CREAT) |
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#ifndef O_NDELAY |
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#define O_NDELAY O_NONBLOCK |
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#endif |
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#define F_DUPFD 0 /* dup */ |
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#define F_GETFD 1 /* get close_on_exec */ |
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#define F_SETFD 2 /* set/clear close_on_exec */ |
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#define F_GETFL 3 /* get file->f_flags */ |
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#define F_SETFL 4 /* set file->f_flags */ |
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#ifndef F_GETLK |
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#define F_GETLK 5 |
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#define F_SETLK 6 |
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#define F_SETLKW 7 |
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#endif |
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#ifndef F_SETOWN |
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#define F_SETOWN 8 /* for sockets. */ |
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#define F_GETOWN 9 /* for sockets. */ |
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#endif |
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#ifndef F_SETSIG |
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#define F_SETSIG 10 /* for sockets. */ |
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#define F_GETSIG 11 /* for sockets. */ |
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#endif |
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#ifndef CONFIG_64BIT |
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#ifndef F_GETLK64 |
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#define F_GETLK64 12 /* using 'struct flock64' */ |
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#define F_SETLK64 13 |
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#define F_SETLKW64 14 |
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#endif |
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#endif |
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#ifndef F_SETOWN_EX |
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#define F_SETOWN_EX 15 |
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#define F_GETOWN_EX 16 |
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#endif |
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#ifndef F_GETOWNER_UIDS |
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#define F_GETOWNER_UIDS 17 |
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#endif |
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/* |
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* Open File Description Locks |
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* |
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* Usually record locks held by a process are released on *any* close and are |
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* not inherited across a fork(). |
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* |
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* These cmd values will set locks that conflict with process-associated |
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* record locks, but are "owned" by the open file description, not the |
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* process. This means that they are inherited across fork() like BSD (flock) |
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* locks, and they are only released automatically when the last reference to |
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* the the open file against which they were acquired is put. |
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*/ |
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#define F_OFD_GETLK 36 |
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#define F_OFD_SETLK 37 |
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#define F_OFD_SETLKW 38 |
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#define F_OWNER_TID 0 |
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#define F_OWNER_PID 1 |
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#define F_OWNER_PGRP 2 |
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struct f_owner_ex { |
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int type; |
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__kernel_pid_t pid; |
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}; |
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/* for F_[GET|SET]FL */ |
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#define FD_CLOEXEC 1 /* actually anything with low bit set goes */ |
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/* for posix fcntl() and lockf() */ |
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#ifndef F_RDLCK |
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#define F_RDLCK 0 |
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#define F_WRLCK 1 |
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#define F_UNLCK 2 |
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#endif |
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/* for old implementation of bsd flock () */ |
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#ifndef F_EXLCK |
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#define F_EXLCK 4 /* or 3 */ |
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#define F_SHLCK 8 /* or 4 */ |
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#endif |
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/* operations for bsd flock(), also used by the kernel implementation */ |
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#define LOCK_SH 1 /* shared lock */ |
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#define LOCK_EX 2 /* exclusive lock */ |
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#define LOCK_NB 4 /* or'd with one of the above to prevent |
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blocking */ |
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#define LOCK_UN 8 /* remove lock */ |
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#define LOCK_MAND 32 /* This is a mandatory flock ... */ |
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#define LOCK_READ 64 /* which allows concurrent read operations */ |
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#define LOCK_WRITE 128 /* which allows concurrent write operations */ |
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#define LOCK_RW 192 /* which allows concurrent read & write ops */ |
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#define F_LINUX_SPECIFIC_BASE 1024 |
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#ifndef HAVE_ARCH_STRUCT_FLOCK |
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#ifndef __ARCH_FLOCK_PAD |
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#define __ARCH_FLOCK_PAD |
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#endif |
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struct flock { |
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short l_type; |
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short l_whence; |
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__kernel_off_t l_start; |
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__kernel_off_t l_len; |
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__kernel_pid_t l_pid; |
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__ARCH_FLOCK_PAD |
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}; |
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#endif |
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#ifndef HAVE_ARCH_STRUCT_FLOCK64 |
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#ifndef __ARCH_FLOCK64_PAD |
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#define __ARCH_FLOCK64_PAD |
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#endif |
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struct flock64 { |
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short l_type; |
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short l_whence; |
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__kernel_loff_t l_start; |
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__kernel_loff_t l_len; |
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__kernel_pid_t l_pid; |
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__ARCH_FLOCK64_PAD |
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}; |
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#endif |
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#endif /* _ASM_GENERIC_FCNTL_H */
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