linux-headers (unknown)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _LINUX_FCNTL_H
3 #define _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 #endif /* _LINUX_FCNTL_H */
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