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// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#define __EXPORTED_HEADERS__
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <malloc.h>
#include <sys/ioctl.h>
#include <sys/syscall.h>
#include <linux/memfd.h>
#include <linux/udmabuf.h>
#define TEST_PREFIX "drivers/dma-buf/udmabuf"
#define NUM_PAGES 4
static int memfd_create(const char *name, unsigned int flags)
{
return syscall(__NR_memfd_create, name, flags);
}
int main(int argc, char *argv[])
{
struct udmabuf_create create;
int devfd, memfd, buf, ret;
off_t size;
void *mem;
devfd = open("/dev/udmabuf", O_RDWR);
if (devfd < 0) {
printf("%s: [skip,no-udmabuf: Unable to access DMA buffer device file]\n",
TEST_PREFIX);
exit(77);
}
memfd = memfd_create("udmabuf-test", MFD_ALLOW_SEALING);
if (memfd < 0) {
printf("%s: [skip,no-memfd]\n", TEST_PREFIX);
exit(77);
}
ret = fcntl(memfd, F_ADD_SEALS, F_SEAL_SHRINK);
if (ret < 0) {
printf("%s: [skip,fcntl-add-seals]\n", TEST_PREFIX);
exit(77);
}
size = getpagesize() * NUM_PAGES;
ret = ftruncate(memfd, size);
if (ret == -1) {
printf("%s: [FAIL,memfd-truncate]\n", TEST_PREFIX);
exit(1);
}
memset(&create, 0, sizeof(create));
/* should fail (offset not page aligned) */
create.memfd = memfd;
create.offset = getpagesize()/2;
create.size = getpagesize();
buf = ioctl(devfd, UDMABUF_CREATE, &create);
if (buf >= 0) {
printf("%s: [FAIL,test-1]\n", TEST_PREFIX);
exit(1);
}
/* should fail (size not multiple of page) */
create.memfd = memfd;
create.offset = 0;
create.size = getpagesize()/2;
buf = ioctl(devfd, UDMABUF_CREATE, &create);
if (buf >= 0) {
printf("%s: [FAIL,test-2]\n", TEST_PREFIX);
exit(1);
}
/* should fail (not memfd) */
create.memfd = 0; /* stdin */
create.offset = 0;
create.size = size;
buf = ioctl(devfd, UDMABUF_CREATE, &create);
if (buf >= 0) {
printf("%s: [FAIL,test-3]\n", TEST_PREFIX);
exit(1);
}
/* should work */
create.memfd = memfd;
create.offset = 0;
create.size = size;
buf = ioctl(devfd, UDMABUF_CREATE, &create);
if (buf < 0) {
printf("%s: [FAIL,test-4]\n", TEST_PREFIX);
exit(1);
}
fprintf(stderr, "%s: ok\n", TEST_PREFIX);
close(buf);
close(memfd);
close(devfd);
return 0;
}
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