userfaultfd.h (b28f9db1a7ce4d537ce2fae6fbce5e5e37dc265b) userfaultfd.h (74c98e20a604b9db58284b8727688df70e9bf643)
1/*
2 * include/linux/userfaultfd.h
3 *
4 * Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org>
5 * Copyright (C) 2015 Red Hat, Inc.
6 *
7 */
8

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15 * If the UFFDIO_API is upgraded someday, the UFFDIO_UNREGISTER and
16 * UFFDIO_WAKE ioctls should be defined as _IOW and not as _IOR. In
17 * userfaultfd.h we assumed the kernel was reading (instead _IOC_READ
18 * means the userland is reading).
19 */
20#define UFFD_API ((__u64)0xAA)
21#define UFFD_API_FEATURES (UFFD_FEATURE_EVENT_FORK | \
22 UFFD_FEATURE_EVENT_REMAP | \
1/*
2 * include/linux/userfaultfd.h
3 *
4 * Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org>
5 * Copyright (C) 2015 Red Hat, Inc.
6 *
7 */
8

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15 * If the UFFDIO_API is upgraded someday, the UFFDIO_UNREGISTER and
16 * UFFDIO_WAKE ioctls should be defined as _IOW and not as _IOR. In
17 * userfaultfd.h we assumed the kernel was reading (instead _IOC_READ
18 * means the userland is reading).
19 */
20#define UFFD_API ((__u64)0xAA)
21#define UFFD_API_FEATURES (UFFD_FEATURE_EVENT_FORK | \
22 UFFD_FEATURE_EVENT_REMAP | \
23 UFFD_FEATURE_EVENT_MADVDONTNEED | \
23 UFFD_FEATURE_EVENT_REMOVE | \
24 UFFD_FEATURE_EVENT_UNMAP | \
24 UFFD_FEATURE_MISSING_HUGETLBFS | \
25 UFFD_FEATURE_MISSING_SHMEM)
26#define UFFD_API_IOCTLS \
27 ((__u64)1 << _UFFDIO_REGISTER | \
28 (__u64)1 << _UFFDIO_UNREGISTER | \
29 (__u64)1 << _UFFDIO_API)
30#define UFFD_API_RANGE_IOCTLS \
31 ((__u64)1 << _UFFDIO_WAKE | \

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87 __u64 from;
88 __u64 to;
89 __u64 len;
90 } remap;
91
92 struct {
93 __u64 start;
94 __u64 end;
25 UFFD_FEATURE_MISSING_HUGETLBFS | \
26 UFFD_FEATURE_MISSING_SHMEM)
27#define UFFD_API_IOCTLS \
28 ((__u64)1 << _UFFDIO_REGISTER | \
29 (__u64)1 << _UFFDIO_UNREGISTER | \
30 (__u64)1 << _UFFDIO_API)
31#define UFFD_API_RANGE_IOCTLS \
32 ((__u64)1 << _UFFDIO_WAKE | \

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88 __u64 from;
89 __u64 to;
90 __u64 len;
91 } remap;
92
93 struct {
94 __u64 start;
95 __u64 end;
95 } madv_dn;
96 } remove;
96
97 struct {
98 /* unused reserved fields */
99 __u64 reserved1;
100 __u64 reserved2;
101 __u64 reserved3;
102 } reserved;
103 } arg;
104} __attribute__((packed));
105
106/*
107 * Start at 0x12 and not at 0 to be more strict against bugs.
108 */
109#define UFFD_EVENT_PAGEFAULT 0x12
110#define UFFD_EVENT_FORK 0x13
111#define UFFD_EVENT_REMAP 0x14
97
98 struct {
99 /* unused reserved fields */
100 __u64 reserved1;
101 __u64 reserved2;
102 __u64 reserved3;
103 } reserved;
104 } arg;
105} __attribute__((packed));
106
107/*
108 * Start at 0x12 and not at 0 to be more strict against bugs.
109 */
110#define UFFD_EVENT_PAGEFAULT 0x12
111#define UFFD_EVENT_FORK 0x13
112#define UFFD_EVENT_REMAP 0x14
112#define UFFD_EVENT_MADVDONTNEED 0x15
113#define UFFD_EVENT_REMOVE 0x15
114#define UFFD_EVENT_UNMAP 0x16
113
114/* flags for UFFD_EVENT_PAGEFAULT */
115#define UFFD_PAGEFAULT_FLAG_WRITE (1<<0) /* If this was a write fault */
116#define UFFD_PAGEFAULT_FLAG_WP (1<<1) /* If reason is VM_UFFD_WP */
117
118struct uffdio_api {
119 /* userland asks for an API number and the features to enable */
120 __u64 api;

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150 *
151 * UFFD_FEATURE_MISSING_SHMEM works the same as
152 * UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem
153 * (i.e. tmpfs and other shmem based APIs).
154 */
155#define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0)
156#define UFFD_FEATURE_EVENT_FORK (1<<1)
157#define UFFD_FEATURE_EVENT_REMAP (1<<2)
115
116/* flags for UFFD_EVENT_PAGEFAULT */
117#define UFFD_PAGEFAULT_FLAG_WRITE (1<<0) /* If this was a write fault */
118#define UFFD_PAGEFAULT_FLAG_WP (1<<1) /* If reason is VM_UFFD_WP */
119
120struct uffdio_api {
121 /* userland asks for an API number and the features to enable */
122 __u64 api;

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152 *
153 * UFFD_FEATURE_MISSING_SHMEM works the same as
154 * UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem
155 * (i.e. tmpfs and other shmem based APIs).
156 */
157#define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0)
158#define UFFD_FEATURE_EVENT_FORK (1<<1)
159#define UFFD_FEATURE_EVENT_REMAP (1<<2)
158#define UFFD_FEATURE_EVENT_MADVDONTNEED (1<<3)
160#define UFFD_FEATURE_EVENT_REMOVE (1<<3)
159#define UFFD_FEATURE_MISSING_HUGETLBFS (1<<4)
160#define UFFD_FEATURE_MISSING_SHMEM (1<<5)
161#define UFFD_FEATURE_MISSING_HUGETLBFS (1<<4)
162#define UFFD_FEATURE_MISSING_SHMEM (1<<5)
163#define UFFD_FEATURE_EVENT_UNMAP (1<<6)
161 __u64 features;
162
163 __u64 ioctls;
164};
165
166struct uffdio_range {
167 __u64 start;
168 __u64 len;

--- 48 unchanged lines hidden --- 		164 __u64 features;
165
166 __u64 ioctls;
167};
168
169struct uffdio_range {
170 __u64 start;
171 __u64 len;

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