userfaultfd.h revision 525ce914edf136d2bd02ac8c404d56c52e737f4d 
1/****************************************************************************
2 ****************************************************************************
3 ***
4 ***   This header was automatically generated from a Linux kernel header
5 ***   of the same name, to make information necessary for userspace to
6 ***   call into the kernel available to libc.  It contains only constants,
7 ***   structures, and macros generated from the original header, and thus,
8 ***   contains no copyrightable information.
9 ***
10 ***   To edit the content of this header, modify the corresponding
11 ***   source file (e.g. under external/kernel-headers/original/) then
12 ***   run bionic/libc/kernel/tools/update_all.py
13 ***
14 ***   Any manual change here will be lost the next time this script will
15 ***   be run. You've been warned!
16 ***
17 ****************************************************************************
18 ****************************************************************************/
19#ifndef _LINUX_USERFAULTFD_H
20#define _LINUX_USERFAULTFD_H
21#include <linux/types.h>
22#define UFFD_API ((__u64) 0xAA)
23#define UFFD_API_FEATURES (UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_EVENT_REMAP | UFFD_FEATURE_EVENT_REMOVE | UFFD_FEATURE_EVENT_UNMAP | UFFD_FEATURE_MISSING_HUGETLBFS | UFFD_FEATURE_MISSING_SHMEM)
24#define UFFD_API_IOCTLS ((__u64) 1 << _UFFDIO_REGISTER | (__u64) 1 << _UFFDIO_UNREGISTER | (__u64) 1 << _UFFDIO_API)
25#define UFFD_API_RANGE_IOCTLS ((__u64) 1 << _UFFDIO_WAKE | (__u64) 1 << _UFFDIO_COPY | (__u64) 1 << _UFFDIO_ZEROPAGE)
26#define UFFD_API_RANGE_IOCTLS_BASIC ((__u64) 1 << _UFFDIO_WAKE | (__u64) 1 << _UFFDIO_COPY)
27#define _UFFDIO_REGISTER (0x00)
28#define _UFFDIO_UNREGISTER (0x01)
29#define _UFFDIO_WAKE (0x02)
30#define _UFFDIO_COPY (0x03)
31#define _UFFDIO_ZEROPAGE (0x04)
32#define _UFFDIO_API (0x3F)
33#define UFFDIO 0xAA
34#define UFFDIO_API _IOWR(UFFDIO, _UFFDIO_API, struct uffdio_api)
35#define UFFDIO_REGISTER _IOWR(UFFDIO, _UFFDIO_REGISTER, struct uffdio_register)
36#define UFFDIO_UNREGISTER _IOR(UFFDIO, _UFFDIO_UNREGISTER, struct uffdio_range)
37#define UFFDIO_WAKE _IOR(UFFDIO, _UFFDIO_WAKE, struct uffdio_range)
38#define UFFDIO_COPY _IOWR(UFFDIO, _UFFDIO_COPY, struct uffdio_copy)
39#define UFFDIO_ZEROPAGE _IOWR(UFFDIO, _UFFDIO_ZEROPAGE, struct uffdio_zeropage)
40struct uffd_msg {
41  __u8 event;
42  __u8 reserved1;
43  __u16 reserved2;
44  __u32 reserved3;
45  union {
46    struct {
47      __u64 flags;
48      __u64 address;
49    } pagefault;
50    struct {
51      __u32 ufd;
52    } fork;
53    struct {
54      __u64 from;
55      __u64 to;
56      __u64 len;
57    } remap;
58    struct {
59      __u64 start;
60      __u64 end;
61    } remove;
62    struct {
63      __u64 reserved1;
64      __u64 reserved2;
65      __u64 reserved3;
66    } reserved;
67  } arg;
68} __packed;
69#define UFFD_EVENT_PAGEFAULT 0x12
70#define UFFD_EVENT_FORK 0x13
71#define UFFD_EVENT_REMAP 0x14
72#define UFFD_EVENT_REMOVE 0x15
73#define UFFD_EVENT_UNMAP 0x16
74#define UFFD_PAGEFAULT_FLAG_WRITE (1 << 0)
75#define UFFD_PAGEFAULT_FLAG_WP (1 << 1)
76struct uffdio_api {
77  __u64 api;
78#define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1 << 0)
79#define UFFD_FEATURE_EVENT_FORK (1 << 1)
80#define UFFD_FEATURE_EVENT_REMAP (1 << 2)
81#define UFFD_FEATURE_EVENT_REMOVE (1 << 3)
82#define UFFD_FEATURE_MISSING_HUGETLBFS (1 << 4)
83#define UFFD_FEATURE_MISSING_SHMEM (1 << 5)
84#define UFFD_FEATURE_EVENT_UNMAP (1 << 6)
85  __u64 features;
86  __u64 ioctls;
87};
88struct uffdio_range {
89  __u64 start;
90  __u64 len;
91};
92struct uffdio_register {
93  struct uffdio_range range;
94#define UFFDIO_REGISTER_MODE_MISSING ((__u64) 1 << 0)
95#define UFFDIO_REGISTER_MODE_WP ((__u64) 1 << 1)
96  __u64 mode;
97  __u64 ioctls;
98};
99struct uffdio_copy {
100  __u64 dst;
101  __u64 src;
102  __u64 len;
103#define UFFDIO_COPY_MODE_DONTWAKE ((__u64) 1 << 0)
104  __u64 mode;
105  __s64 copy;
106};
107struct uffdio_zeropage {
108  struct uffdio_range range;
109#define UFFDIO_ZEROPAGE_MODE_DONTWAKE ((__u64) 1 << 0)
110  __u64 mode;
111  __s64 zeropage;
112};
113#endif
114