| 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 | |
| 35 | #if defined CONFIG_LINUX && !defined CONFIG_MEMFD |
| 36 | int memfd_create(const char *name, unsigned int flags); |
| 37 | #endif |
| 38 | |
| 39 | int qemu_memfd_create(const char *name, size_t size, bool hugetlb, |
| 40 | uint64_t hugetlbsize, unsigned int seals, Error **errp); |
| 41 | bool qemu_memfd_alloc_check(void); |
| 42 | void *qemu_memfd_alloc(const char *name, size_t size, unsigned int seals, |
| 43 | int *fd, Error **errp); |
| 44 | void qemu_memfd_free(void *ptr, size_t size, int fd); |
| 45 | bool qemu_memfd_check(unsigned int flags); |
| 46 | |
| 47 | #endif /* QEMU_MEMFD_H */ |