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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef _UAPI_LINUX_FCNTL_H3#define _UAPI_LINUX_FCNTL_H4 5#include <asm/fcntl.h>6#include <linux/openat2.h>7 8#define F_SETLEASE (F_LINUX_SPECIFIC_BASE + 0)9#define F_GETLEASE (F_LINUX_SPECIFIC_BASE + 1)10 11/*12 * Request nofications on a directory.13 * See below for events that may be notified.14 */15#define F_NOTIFY (F_LINUX_SPECIFIC_BASE + 2)16 17#define F_DUPFD_QUERY (F_LINUX_SPECIFIC_BASE + 3)18 19/* Was the file just created? */20#define F_CREATED_QUERY (F_LINUX_SPECIFIC_BASE + 4)21 22/*23 * Cancel a blocking posix lock; internal use only until we expose an24 * asynchronous lock api to userspace:25 */26#define F_CANCELLK (F_LINUX_SPECIFIC_BASE + 5)27 28/* Create a file descriptor with FD_CLOEXEC set. */29#define F_DUPFD_CLOEXEC (F_LINUX_SPECIFIC_BASE + 6)30 31/*32 * Set and get of pipe page size array33 */34#define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)35#define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)36 37/*38 * Set/Get seals39 */40#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)41#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)42 43/*44 * Types of seals45 */46#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */47#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */48#define F_SEAL_GROW 0x0004 /* prevent file from growing */49#define F_SEAL_WRITE 0x0008 /* prevent writes */50#define F_SEAL_FUTURE_WRITE 0x0010 /* prevent future writes while mapped */51#define F_SEAL_EXEC 0x0020 /* prevent chmod modifying exec bits */52/* (1U << 31) is reserved for signed error codes */53 54/*55 * Set/Get write life time hints. {GET,SET}_RW_HINT operate on the56 * underlying inode, while {GET,SET}_FILE_RW_HINT operate only on57 * the specific file.58 */59#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)60#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)61#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)62#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)63 64/*65 * Valid hint values for F_{GET,SET}_RW_HINT. 0 is "not set", or can be66 * used to clear any hints previously set.67 */68#define RWH_WRITE_LIFE_NOT_SET 069#define RWH_WRITE_LIFE_NONE 170#define RWH_WRITE_LIFE_SHORT 271#define RWH_WRITE_LIFE_MEDIUM 372#define RWH_WRITE_LIFE_LONG 473#define RWH_WRITE_LIFE_EXTREME 574 75/*76 * The originally introduced spelling is remained from the first77 * versions of the patch set that introduced the feature, see commit78 * v4.13-rc1~212^2~51.79 */80#define RWF_WRITE_LIFE_NOT_SET RWH_WRITE_LIFE_NOT_SET81 82/*83 * Types of directory notifications that may be requested.84 */85#define DN_ACCESS 0x00000001 /* File accessed */86#define DN_MODIFY 0x00000002 /* File modified */87#define DN_CREATE 0x00000004 /* File created */88#define DN_DELETE 0x00000008 /* File removed */89#define DN_RENAME 0x00000010 /* File renamed */90#define DN_ATTRIB 0x00000020 /* File changed attibutes */91#define DN_MULTISHOT 0x80000000 /* Don't remove notifier */92 93#define AT_FDCWD -100 /* Special value for dirfd used to94 indicate openat should use the95 current working directory. */96 97 98/* Generic flags for the *at(2) family of syscalls. */99 100/* Reserved for per-syscall flags 0xff. */101#define AT_SYMLINK_NOFOLLOW 0x100 /* Do not follow symbolic102 links. */103/* Reserved for per-syscall flags 0x200 */104#define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */105#define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount106 traversal. */107#define AT_EMPTY_PATH 0x1000 /* Allow empty relative108 pathname to operate on dirfd109 directly. */110/*111 * These flags are currently statx(2)-specific, but they could be made generic112 * in the future and so they should not be used for other per-syscall flags.113 */114#define AT_STATX_SYNC_TYPE 0x6000 /* Type of synchronisation required from statx() */115#define AT_STATX_SYNC_AS_STAT 0x0000 /* - Do whatever stat() does */116#define AT_STATX_FORCE_SYNC 0x2000 /* - Force the attributes to be sync'd with the server */117#define AT_STATX_DONT_SYNC 0x4000 /* - Don't sync attributes with the server */118 119#define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */120 121/*122 * Per-syscall flags for the *at(2) family of syscalls.123 *124 * These are flags that are so syscall-specific that a user passing these flags125 * to the wrong syscall is so "clearly wrong" that we can safely call such126 * usage "undefined behaviour".127 *128 * For example, the constants AT_REMOVEDIR and AT_EACCESS have the same value.129 * AT_EACCESS is meaningful only to faccessat, while AT_REMOVEDIR is meaningful130 * only to unlinkat. The two functions do completely different things and131 * therefore, the flags can be allowed to overlap. For example, passing132 * AT_REMOVEDIR to faccessat would be undefined behavior and thus treating it133 * equivalent to AT_EACCESS is valid undefined behavior.134 *135 * Note for implementers: When picking a new per-syscall AT_* flag, try to136 * reuse already existing flags first. This leaves us with as many unused bits137 * as possible, so we can use them for generic bits in the future if necessary.138 */139 140/* Flags for renameat2(2) (must match legacy RENAME_* flags). */141#define AT_RENAME_NOREPLACE 0x0001142#define AT_RENAME_EXCHANGE 0x0002143#define AT_RENAME_WHITEOUT 0x0004144 145/* Flag for faccessat(2). */146#define AT_EACCESS 0x200 /* Test access permitted for147 effective IDs, not real IDs. */148/* Flag for unlinkat(2). */149#define AT_REMOVEDIR 0x200 /* Remove directory instead of150 unlinking file. */151/* Flags for name_to_handle_at(2). */152#define AT_HANDLE_FID 0x200 /* File handle is needed to compare153 object identity and may not be154 usable with open_by_handle_at(2). */155#define AT_HANDLE_MNT_ID_UNIQUE 0x001 /* Return the u64 unique mount ID. */156 157#if defined(__KERNEL__)158#define AT_GETATTR_NOSEC 0x80000000159#endif160 161#endif /* _UAPI_LINUX_FCNTL_H */162