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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _UAPI_LINUX_FCNTL_H
3#define _UAPI_LINUX_FCNTL_H
4
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/*
20 * Cancel a blocking posix lock; internal use only until we expose an
21 * asynchronous lock api to userspace:
22 */
23#define F_CANCELLK (F_LINUX_SPECIFIC_BASE + 5)
24
25/* Create a file descriptor with FD_CLOEXEC set. */
26#define F_DUPFD_CLOEXEC (F_LINUX_SPECIFIC_BASE + 6)
27
28/*
29 * Set and get of pipe page size array
30 */
31#define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
32#define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
33
34/*
35 * Set/Get seals
36 */
37#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
38#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
39
40/*
41 * Types of seals
42 */
43#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
44#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
45#define F_SEAL_GROW 0x0004 /* prevent file from growing */
46#define F_SEAL_WRITE 0x0008 /* prevent writes */
47#define F_SEAL_FUTURE_WRITE 0x0010 /* prevent future writes while mapped */
48#define F_SEAL_EXEC 0x0020 /* prevent chmod modifying exec bits */
49/* (1U << 31) is reserved for signed error codes */
50
51/*
52 * Set/Get write life time hints. {GET,SET}_RW_HINT operate on the
53 * underlying inode, while {GET,SET}_FILE_RW_HINT operate only on
54 * the specific file.
55 */
56#define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
57#define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
58#define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
59#define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
60
61/*
62 * Valid hint values for F_{GET,SET}_RW_HINT. 0 is "not set", or can be
63 * used to clear any hints previously set.
64 */
65#define RWH_WRITE_LIFE_NOT_SET 0
66#define RWH_WRITE_LIFE_NONE 1
67#define RWH_WRITE_LIFE_SHORT 2
68#define RWH_WRITE_LIFE_MEDIUM 3
69#define RWH_WRITE_LIFE_LONG 4
70#define RWH_WRITE_LIFE_EXTREME 5
71
72/*
73 * The originally introduced spelling is remained from the first
74 * versions of the patch set that introduced the feature, see commit
75 * v4.13-rc1~212^2~51.
76 */
77#define RWF_WRITE_LIFE_NOT_SET RWH_WRITE_LIFE_NOT_SET
78
79/*
80 * Types of directory notifications that may be requested.
81 */
82#define DN_ACCESS 0x00000001 /* File accessed */
83#define DN_MODIFY 0x00000002 /* File modified */
84#define DN_CREATE 0x00000004 /* File created */
85#define DN_DELETE 0x00000008 /* File removed */
86#define DN_RENAME 0x00000010 /* File renamed */
87#define DN_ATTRIB 0x00000020 /* File changed attibutes */
88#define DN_MULTISHOT 0x80000000 /* Don't remove notifier */
89
90/*
91 * The constants AT_REMOVEDIR and AT_EACCESS have the same value. AT_EACCESS is
92 * meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
93 * unlinkat. The two functions do completely different things and therefore,
94 * the flags can be allowed to overlap. For example, passing AT_REMOVEDIR to
95 * faccessat would be undefined behavior and thus treating it equivalent to
96 * AT_EACCESS is valid undefined behavior.
97 */
98#define AT_FDCWD -100 /* Special value used to indicate
99 openat should use the current
100 working directory. */
101#define AT_SYMLINK_NOFOLLOW 0x100 /* Do not follow symbolic links. */
102#define AT_EACCESS 0x200 /* Test access permitted for
103 effective IDs, not real IDs. */
104#define AT_REMOVEDIR 0x200 /* Remove directory instead of
105 unlinking file. */
106#define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */
107#define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount traversal */
108#define AT_EMPTY_PATH 0x1000 /* Allow empty relative pathname */
109
110#define AT_STATX_SYNC_TYPE 0x6000 /* Type of synchronisation required from statx() */
111#define AT_STATX_SYNC_AS_STAT 0x0000 /* - Do whatever stat() does */
112#define AT_STATX_FORCE_SYNC 0x2000 /* - Force the attributes to be sync'd with the server */
113#define AT_STATX_DONT_SYNC 0x4000 /* - Don't sync attributes with the server */
114
115#define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */
116
117/* Flags for name_to_handle_at(2). We reuse AT_ flag space to save bits... */
118#define AT_HANDLE_FID AT_REMOVEDIR /* file handle is needed to
119 compare object identity and may not
120 be usable to open_by_handle_at(2) */
121#if defined(__KERNEL__)
122#define AT_GETATTR_NOSEC 0x80000000
123#endif
124
125#endif /* _UAPI_LINUX_FCNTL_H */