LXR qemu/include/qemu/memfd.h

   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
  36int memfd_create(const char *name, unsigned int flags);
  37#endif
  38
  39int qemu_memfd_create(const char *name, size_t size, bool hugetlb,
  40                      uint64_t hugetlbsize, unsigned int seals, Error **errp);
  41bool qemu_memfd_alloc_check(void);
  42void *qemu_memfd_alloc(const char *name, size_t size, unsigned int seals,
  43                       int *fd, Error **errp);
  44void qemu_memfd_free(void *ptr, size_t size, int fd);
  45bool qemu_memfd_check(unsigned int flags);
  46
  47#endif /* QEMU_MEMFD_H */
  48