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 */
126
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