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On RHEL7, memfd is not supported, and vhost-user-test fails: TEST: tests/vhost-user-test... (pid=10248) /x86_64/vhost-user/migrate: qemu-system-x86_64: -object memory-backend-memfd,id=mem,size=2M,: failed to create memfd FAIL There is a qemu_memfd_check() to prevent running memfd path, but it also checks for fallback implementation. Let's specialize qemu_memfd_check() to check memfd only, while qemu_memfd_alloc_check() checks for the qemu_memfd_alloc() API. Reported-by: Miroslav Rezanina <mrezanin@redhat.com> Tested-by: Miroslav Rezanina <mrezanin@redhat.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20180328121804.16203-1-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
28 lines
913 B
C
28 lines
913 B
C
#ifndef QEMU_MEMFD_H
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#define QEMU_MEMFD_H
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#ifndef F_LINUX_SPECIFIC_BASE
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#define F_LINUX_SPECIFIC_BASE 1024
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#endif
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#ifndef F_ADD_SEALS
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#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
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#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
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#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
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#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
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#define F_SEAL_GROW 0x0004 /* prevent file from growing */
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#define F_SEAL_WRITE 0x0008 /* prevent writes */
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#endif
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int qemu_memfd_create(const char *name, size_t size, bool hugetlb,
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uint64_t hugetlbsize, unsigned int seals, Error **errp);
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bool qemu_memfd_alloc_check(void);
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void *qemu_memfd_alloc(const char *name, size_t size, unsigned int seals,
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int *fd, Error **errp);
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void qemu_memfd_free(void *ptr, size_t size, int fd);
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bool qemu_memfd_check(void);
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#endif /* QEMU_MEMFD_H */
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