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 * Cancel a blocking posix lock; internal use only until we expose an
13 * asynchronous lock api to userspace:
14 */
15#define F_CANCELLK	(F_LINUX_SPECIFIC_BASE + 5)
16
17/* Create a file descriptor with FD_CLOEXEC set. */
18#define F_DUPFD_CLOEXEC	(F_LINUX_SPECIFIC_BASE + 6)
19
20/*
21 * Request nofications on a directory.
22 * See below for events that may be notified.
23 */
24#define F_NOTIFY	(F_LINUX_SPECIFIC_BASE+2)
25
26/*
27 * Set and get of pipe page size array
28 */
29#define F_SETPIPE_SZ	(F_LINUX_SPECIFIC_BASE + 7)
30#define F_GETPIPE_SZ	(F_LINUX_SPECIFIC_BASE + 8)
31
32/*
33 * Set/Get seals
34 */
35#define F_ADD_SEALS	(F_LINUX_SPECIFIC_BASE + 9)
36#define F_GET_SEALS	(F_LINUX_SPECIFIC_BASE + 10)
37
38/*
39 * Types of seals
40 */
41#define F_SEAL_SEAL	0x0001	/* prevent further seals from being set */
42#define F_SEAL_SHRINK	0x0002	/* prevent file from shrinking */
43#define F_SEAL_GROW	0x0004	/* prevent file from growing */
44#define F_SEAL_WRITE	0x0008	/* prevent writes */
45#define F_SEAL_FUTURE_WRITE	0x0010  /* prevent future writes while mapped */
46#define F_SEAL_EXEC	0x0020  /* prevent chmod modifying exec bits */
47/* (1U << 31) is reserved for signed error codes */
48
49/*
50 * Set/Get write life time hints. {GET,SET}_RW_HINT operate on the
51 * underlying inode, while {GET,SET}_FILE_RW_HINT operate only on
52 * the specific file.
53 */
54#define F_GET_RW_HINT		(F_LINUX_SPECIFIC_BASE + 11)
55#define F_SET_RW_HINT		(F_LINUX_SPECIFIC_BASE + 12)
56#define F_GET_FILE_RW_HINT	(F_LINUX_SPECIFIC_BASE + 13)
57#define F_SET_FILE_RW_HINT	(F_LINUX_SPECIFIC_BASE + 14)
58
59/*
60 * Valid hint values for F_{GET,SET}_RW_HINT. 0 is "not set", or can be
61 * used to clear any hints previously set.
62 */
63#define RWH_WRITE_LIFE_NOT_SET	0
64#define RWH_WRITE_LIFE_NONE	1
65#define RWH_WRITE_LIFE_SHORT	2
66#define RWH_WRITE_LIFE_MEDIUM	3
67#define RWH_WRITE_LIFE_LONG	4
68#define RWH_WRITE_LIFE_EXTREME	5
69
70/*
71 * The originally introduced spelling is remained from the first
72 * versions of the patch set that introduced the feature, see commit
73 * v4.13-rc1~212^2~51.
74 */
75#define RWF_WRITE_LIFE_NOT_SET	RWH_WRITE_LIFE_NOT_SET
76
77/*
78 * Types of directory notifications that may be requested.
79 */
80#define DN_ACCESS	0x00000001	/* File accessed */
81#define DN_MODIFY	0x00000002	/* File modified */
82#define DN_CREATE	0x00000004	/* File created */
83#define DN_DELETE	0x00000008	/* File removed */
84#define DN_RENAME	0x00000010	/* File renamed */
85#define DN_ATTRIB	0x00000020	/* File changed attibutes */
86#define DN_MULTISHOT	0x80000000	/* Don't remove notifier */
87
88/*
89 * The constants AT_REMOVEDIR and AT_EACCESS have the same value.  AT_EACCESS is
90 * meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
91 * unlinkat.  The two functions do completely different things and therefore,
92 * the flags can be allowed to overlap.  For example, passing AT_REMOVEDIR to
93 * faccessat would be undefined behavior and thus treating it equivalent to
94 * AT_EACCESS is valid undefined behavior.
95 */
96#define AT_FDCWD		-100    /* Special value used to indicate
97                                           openat should use the current
98                                           working directory. */
99#define AT_SYMLINK_NOFOLLOW	0x100   /* Do not follow symbolic links.  */
100#define AT_EACCESS		0x200	/* Test access permitted for
101                                           effective IDs, not real IDs.  */
102#define AT_REMOVEDIR		0x200   /* Remove directory instead of
103                                           unlinking file.  */
104#define AT_SYMLINK_FOLLOW	0x400   /* Follow symbolic links.  */
105#define AT_NO_AUTOMOUNT		0x800	/* Suppress terminal automount traversal */
106#define AT_EMPTY_PATH		0x1000	/* Allow empty relative pathname */
107
108#define AT_STATX_SYNC_TYPE	0x6000	/* Type of synchronisation required from statx() */
109#define AT_STATX_SYNC_AS_STAT	0x0000	/* - Do whatever stat() does */
110#define AT_STATX_FORCE_SYNC	0x2000	/* - Force the attributes to be sync'd with the server */
111#define AT_STATX_DONT_SYNC	0x4000	/* - Don't sync attributes with the server */
112
113#define AT_RECURSIVE		0x8000	/* Apply to the entire subtree */
114
115/* Flags for name_to_handle_at(2). We reuse AT_ flag space to save bits... */
116#define AT_HANDLE_FID		AT_REMOVEDIR	/* file handle is needed to
117					compare object identity and may not
118					be usable to open_by_handle_at(2) */
119#if defined(__KERNEL__)
120#define AT_GETATTR_NOSEC	0x80000000
121#endif
122
123#endif /* _UAPI_LINUX_FCNTL_H */
124