1#ifndef QEMU_MEMFD_H
2#define QEMU_MEMFD_H
3
4
5#ifndef F_LINUX_SPECIFIC_BASE
6#define F_LINUX_SPECIFIC_BASE 1024
7#endif
8
9#ifndef F_ADD_SEALS
10#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
11#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
12
13#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
14#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
15#define F_SEAL_GROW 0x0004 /* prevent file from growing */
16#define F_SEAL_WRITE 0x0008 /* prevent writes */
17#endif
18
19#ifndef MFD_CLOEXEC
20#define MFD_CLOEXEC 0x0001U
21#endif
22
23#ifndef MFD_ALLOW_SEALING
24#define MFD_ALLOW_SEALING 0x0002U
25#endif
26
27#ifndef MFD_HUGETLB
28#define MFD_HUGETLB 0x0004U
29#endif
30
31#ifndef MFD_HUGE_SHIFT
32#define MFD_HUGE_SHIFT 26
33#endif
34
35int qemu_memfd_create(const char *name, size_t size, bool hugetlb,
36 uint64_t hugetlbsize, unsigned int seals, Error **errp);
37bool qemu_memfd_alloc_check(void);
38void *qemu_memfd_alloc(const char *name, size_t size, unsigned int seals,
39 int *fd, Error **errp);
40void qemu_memfd_free(void *ptr, size_t size, int fd);
41bool qemu_memfd_check(unsigned int flags);
42
43#endif /* QEMU_MEMFD_H */
44