fcntl.h (5766B)
- /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
- #ifndef _LINUX_FCNTL_H
- #define _LINUX_FCNTL_H
- #include <asm/fcntl.h>
- #include <linux/openat2.h>
- #define F_SETLEASE (F_LINUX_SPECIFIC_BASE + 0)
- #define F_GETLEASE (F_LINUX_SPECIFIC_BASE + 1)
- /*
- * Request nofications on a directory.
- * See below for events that may be notified.
- */
- #define F_NOTIFY (F_LINUX_SPECIFIC_BASE + 2)
- #define F_DUPFD_QUERY (F_LINUX_SPECIFIC_BASE + 3)
- /* Was the file just created? */
- #define F_CREATED_QUERY (F_LINUX_SPECIFIC_BASE + 4)
- /*
- * Cancel a blocking posix lock; internal use only until we expose an
- * asynchronous lock api to userspace:
- */
- #define F_CANCELLK (F_LINUX_SPECIFIC_BASE + 5)
- /* Create a file descriptor with FD_CLOEXEC set. */
- #define F_DUPFD_CLOEXEC (F_LINUX_SPECIFIC_BASE + 6)
- /*
- * Set and get of pipe page size array
- */
- #define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
- #define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
- /*
- * Set/Get seals
- */
- #define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
- #define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
- /*
- * Types of seals
- */
- #define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
- #define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
- #define F_SEAL_GROW 0x0004 /* prevent file from growing */
- #define F_SEAL_WRITE 0x0008 /* prevent writes */
- #define F_SEAL_FUTURE_WRITE 0x0010 /* prevent future writes while mapped */
- #define F_SEAL_EXEC 0x0020 /* prevent chmod modifying exec bits */
- /* (1U << 31) is reserved for signed error codes */
- /*
- * Set/Get write life time hints. {GET,SET}_RW_HINT operate on the
- * underlying inode, while {GET,SET}_FILE_RW_HINT operate only on
- * the specific file.
- */
- #define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
- #define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
- #define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
- #define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
- /*
- * Valid hint values for F_{GET,SET}_RW_HINT. 0 is "not set", or can be
- * used to clear any hints previously set.
- */
- #define RWH_WRITE_LIFE_NOT_SET 0
- #define RWH_WRITE_LIFE_NONE 1
- #define RWH_WRITE_LIFE_SHORT 2
- #define RWH_WRITE_LIFE_MEDIUM 3
- #define RWH_WRITE_LIFE_LONG 4
- #define RWH_WRITE_LIFE_EXTREME 5
- /*
- * The originally introduced spelling is remained from the first
- * versions of the patch set that introduced the feature, see commit
- * v4.13-rc1~212^2~51.
- */
- #define RWF_WRITE_LIFE_NOT_SET RWH_WRITE_LIFE_NOT_SET
- /*
- * Types of directory notifications that may be requested.
- */
- #define DN_ACCESS 0x00000001 /* File accessed */
- #define DN_MODIFY 0x00000002 /* File modified */
- #define DN_CREATE 0x00000004 /* File created */
- #define DN_DELETE 0x00000008 /* File removed */
- #define DN_RENAME 0x00000010 /* File renamed */
- #define DN_ATTRIB 0x00000020 /* File changed attibutes */
- #define DN_MULTISHOT 0x80000000 /* Don't remove notifier */
- #define AT_FDCWD -100 /* Special value for dirfd used to
- indicate openat should use the
- current working directory. */
- /* Generic flags for the *at(2) family of syscalls. */
- /* Reserved for per-syscall flags 0xff. */
- #define AT_SYMLINK_NOFOLLOW 0x100 /* Do not follow symbolic
- links. */
- /* Reserved for per-syscall flags 0x200 */
- #define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */
- #define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount
- traversal. */
- #define AT_EMPTY_PATH 0x1000 /* Allow empty relative
- pathname to operate on dirfd
- directly. */
- /*
- * These flags are currently statx(2)-specific, but they could be made generic
- * in the future and so they should not be used for other per-syscall flags.
- */
- #define AT_STATX_SYNC_TYPE 0x6000 /* Type of synchronisation required from statx() */
- #define AT_STATX_SYNC_AS_STAT 0x0000 /* - Do whatever stat() does */
- #define AT_STATX_FORCE_SYNC 0x2000 /* - Force the attributes to be sync'd with the server */
- #define AT_STATX_DONT_SYNC 0x4000 /* - Don't sync attributes with the server */
- #define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */
- /*
- * Per-syscall flags for the *at(2) family of syscalls.
- *
- * These are flags that are so syscall-specific that a user passing these flags
- * to the wrong syscall is so "clearly wrong" that we can safely call such
- * usage "undefined behaviour".
- *
- * For example, the constants AT_REMOVEDIR and AT_EACCESS have the same value.
- * AT_EACCESS is meaningful only to faccessat, while AT_REMOVEDIR is meaningful
- * only to unlinkat. The two functions do completely different things and
- * therefore, the flags can be allowed to overlap. For example, passing
- * AT_REMOVEDIR to faccessat would be undefined behavior and thus treating it
- * equivalent to AT_EACCESS is valid undefined behavior.
- *
- * Note for implementers: When picking a new per-syscall AT_* flag, try to
- * reuse already existing flags first. This leaves us with as many unused bits
- * as possible, so we can use them for generic bits in the future if necessary.
- */
- /* Flags for renameat2(2) (must match legacy RENAME_* flags). */
- #define AT_RENAME_NOREPLACE 0x0001
- #define AT_RENAME_EXCHANGE 0x0002
- #define AT_RENAME_WHITEOUT 0x0004
- /* Flag for faccessat(2). */
- #define AT_EACCESS 0x200 /* Test access permitted for
- effective IDs, not real IDs. */
- /* Flag for unlinkat(2). */
- #define AT_REMOVEDIR 0x200 /* Remove directory instead of
- unlinking file. */
- /* Flags for name_to_handle_at(2). */
- #define AT_HANDLE_FID 0x200 /* File handle is needed to compare
- object identity and may not be
- usable with open_by_handle_at(2). */
- #define AT_HANDLE_MNT_ID_UNIQUE 0x001 /* Return the u64 unique mount ID. */
- #endif /* _LINUX_FCNTL_H */