1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_LINUX_FCNTL_H
3 #define _UAPI_LINUX_FCNTL_H
6 #include <linux/openat2.h>
8 #define F_SETLEASE (F_LINUX_SPECIFIC_BASE + 0)
9 #define F_GETLEASE (F_LINUX_SPECIFIC_BASE + 1)
12 * Cancel a blocking posix lock; internal use only until we expose an
13 * asynchronous lock api to userspace:
15 #define F_CANCELLK (F_LINUX_SPECIFIC_BASE + 5)
17 /* Create a file descriptor with FD_CLOEXEC set. */
18 #define F_DUPFD_CLOEXEC (F_LINUX_SPECIFIC_BASE + 6)
21 * Request nofications on a directory.
22 * See below for events that may be notified.
24 #define F_NOTIFY (F_LINUX_SPECIFIC_BASE+2)
27 * Set and get of pipe page size array
29 #define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
30 #define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
35 #define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
36 #define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
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 */
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
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)
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.
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
71 * The originally introduced spelling is remained from the first
72 * versions of the patch set that introduced the feature, see commit
75 #define RWF_WRITE_LIFE_NOT_SET RWH_WRITE_LIFE_NOT_SET
78 * Types of directory notifications that may be requested.
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 */
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.
96 #define AT_FDCWD -100 /* Special value used to indicate
97 openat should use the current
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
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 */
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 */
113 #define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */
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) */
120 #endif /* _UAPI_LINUX_FCNTL_H */