Differential D42709 Diff 130655 lib/libc/gen/memfd_create.c

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lib/libc/gen/memfd_create.c

This file was copied from lib/libc/sys/shm_open.c.

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	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF			* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR			* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
	* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,			* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE			* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
	* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,			* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
	* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.			* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/			*/

	#include <sys/param.h>			#include <sys/param.h>
	#include <sys/filio.h>			#include <sys/filio.h>
	#include <sys/mman.h>			#include <sys/mman.h>

	#include <errno.h>			#include <errno.h>
	#include <fcntl.h>			#include <fcntl.h>
	#include <limits.h>
	#include <stdlib.h>
	#include <stdio.h>			#include <stdio.h>
				#include <stdlib.h>
	#include <string.h>			#include <string.h>
	#include <unistd.h>			#include <unistd.h>
				emasteUnsubmitted Not Done Inline Actions are any of these headers no longer needed in one or the other of these files? emaste: are any of these headers no longer needed in one or the other of these files?

	#include "libc_private.h"			#include "libc_private.h"

	__weak_reference(shm_open, _shm_open);
	__weak_reference(shm_open, __sys_shm_open);

	#define MEMFD_NAME_PREFIX "memfd:"			#define MEMFD_NAME_PREFIX "memfd:"

	int
	shm_open(const char *path, int flags, mode_t mode)
	{

	return (__sys_shm_open2(path, flags \| O_CLOEXEC, mode, 0, NULL));
	}

	int
	shm_create_largepage(const char *path, int flags, int psind, int alloc_policy,
	mode_t mode)
	{
	struct shm_largepage_conf slc;
	int error, fd, saved_errno;

	fd = __sys_shm_open2(path, flags \| O_CREAT, mode, SHM_LARGEPAGE, NULL);
	if (fd == -1)
	return (-1);

	memset(&slc, 0, sizeof(slc));
	slc.psind = psind;
	slc.alloc_policy = alloc_policy;
	error = ioctl(fd, FIOSSHMLPGCNF, &slc);
	if (error == -1) {
	saved_errno = errno;
	close(fd);
	errno = saved_errno;
	return (-1);
	}
	return (fd);
	}

	/*			/*
	* The path argument is passed to the kernel, but the kernel doesn't currently			* The path argument is passed to the kernel, but the kernel doesn't currently
	* do anything with it. Linux exposes it in linprocfs for debugging purposes			* do anything with it. Linux exposes it in linprocfs for debugging purposes
	* only, but our kernel currently will not do the same.			* only, but our kernel currently will not do the same.
	*/			*/
	int			int
	memfd_create(const char *name, unsigned int flags)			memfd_create(const char *name, unsigned int flags)
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