Function main

test/cmd-discard.c:351–435

}

int main(int argc, char *argv[])
{
	struct io_uring ring;
	int fd, ret, i, fret;
	int cmd_op;

	if (argc != 2)
		return T_EXIT_SKIP;
	filename = argv[1];

	fd = open(filename, O_DIRECT | O_RDONLY | O_EXCL);
	if (fd < 0) {
		if (errno == EINVAL || errno == EBUSY)
			return T_EXIT_SKIP;
		fprintf(stderr, "open failed %i\n", errno);
		return T_EXIT_FAIL;
	}

	ret = ioctl(fd, BLKGETSIZE64, &bdev_size);
	if (ret < 0) {
		fprintf(stderr, "BLKGETSIZE64 failed %i\n", errno);
		return T_EXIT_FAIL;
	}
	ret = ioctl(fd, BLKSSZGET, &lba_size);
	if (ret < 0) {
		fprintf(stderr, "BLKSSZGET failed %i\n", errno);
		return T_EXIT_FAIL;
	}
	assert(bdev_size % lba_size == 0);
	bdev_size_lbas = bdev_size / lba_size;
	close(fd);

	buffer = t_aligned_alloc(lba_size, lba_size);
	if (!buffer) {
		fprintf(stderr, "t_aligned_alloc failed\n");
		return T_EXIT_FAIL;
	}
	for (i = 0; i < lba_size; i++)
		buffer[i] = i ^ 0xA7;

	if (bdev_size_lbas < MAX_TEST_LBAS) {
		fprintf(stderr, "the device is too small, skip\n");
		return T_EXIT_SKIP;
	}

	ret = io_uring_queue_init(16, &ring, 0);
	if (ret) {
		fprintf(stderr, "queue init failed: %d\n", ret);
		return T_EXIT_FAIL;
	}

	fret = T_EXIT_SKIP;
	for (cmd_op = 0; cmd_op < TEST_BLOCK_URING_CMD_MAX; cmd_op++) {
		if (!opcodes[cmd_op].test)
			continue;
		ret = basic_cmd_test(&ring, cmd_op);
		if (ret == T_EXIT_FAIL) {
			fprintf(stderr, "basic_cmd_test() failed, cmd %i\n",