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