userfaultfd.h revision 1308ad3ab33294c3abfd96da12b6df58b381ce52 
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 | UFFD_FEATURE_SIGBUS | UFFD_FEATURE_THREAD_ID)
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      union {
50        __u32 ptid;
51      } feat;
52    } pagefault;
53    struct {
54      __u32 ufd;
55    } fork;
56    struct {
57      __u64 from;
58      __u64 to;
59      __u64 len;
60    } remap;
61    struct {
62      __u64 start;
63      __u64 end;
64    } remove;
65    struct {
66      __u64 reserved1;
67      __u64 reserved2;
68      __u64 reserved3;
69    } reserved;
70  } arg;
71} __packed;
72#define UFFD_EVENT_PAGEFAULT 0x12
73#define UFFD_EVENT_FORK 0x13
74#define UFFD_EVENT_REMAP 0x14
75#define UFFD_EVENT_REMOVE 0x15
76#define UFFD_EVENT_UNMAP 0x16
77#define UFFD_PAGEFAULT_FLAG_WRITE (1 << 0)
78#define UFFD_PAGEFAULT_FLAG_WP (1 << 1)
79struct uffdio_api {
80  __u64 api;
81#define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1 << 0)
82#define UFFD_FEATURE_EVENT_FORK (1 << 1)
83#define UFFD_FEATURE_EVENT_REMAP (1 << 2)
84#define UFFD_FEATURE_EVENT_REMOVE (1 << 3)
85#define UFFD_FEATURE_MISSING_HUGETLBFS (1 << 4)
86#define UFFD_FEATURE_MISSING_SHMEM (1 << 5)
87#define UFFD_FEATURE_EVENT_UNMAP (1 << 6)
88#define UFFD_FEATURE_SIGBUS (1 << 7)
89#define UFFD_FEATURE_THREAD_ID (1 << 8)
90  __u64 features;
91  __u64 ioctls;
92};
93struct uffdio_range {
94  __u64 start;
95  __u64 len;
96};
97struct uffdio_register {
98  struct uffdio_range range;
99#define UFFDIO_REGISTER_MODE_MISSING ((__u64) 1 << 0)
100#define UFFDIO_REGISTER_MODE_WP ((__u64) 1 << 1)
101  __u64 mode;
102  __u64 ioctls;
103};
104struct uffdio_copy {
105  __u64 dst;
106  __u64 src;
107  __u64 len;
108#define UFFDIO_COPY_MODE_DONTWAKE ((__u64) 1 << 0)
109  __u64 mode;
110  __s64 copy;
111};
112struct uffdio_zeropage {
113  struct uffdio_range range;
114#define UFFDIO_ZEROPAGE_MODE_DONTWAKE ((__u64) 1 << 0)
115  __u64 mode;
116  __s64 zeropage;
117};
118#endif
119