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util: add memfd helpers

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Add qemu_memfd_alloc/free() helpers.

The function helps to allocate and seal shared memory.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
This commit is contained in:
Marc-André Lureau 2015-10-09 17:17:20 +02:00 • committed by Michael S. Tsirkin
parent f04cf9239a
commit d3592199ba
2 changed files with 75 additions and 1 deletions
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4
include/qemu/memfd.h
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@ -17,4 +17,8 @@
#define F_SEAL_WRITE 0x0008 /* prevent writes */
#endif
void *qemu_memfd_alloc(const char *name, size_t size, unsigned int seals,
int *fd);
void qemu_memfd_free(void *ptr, size_t size, int fd);
#endif /* QEMU_MEMFD_H */