Function rte_devargs_parse

dpdk/lib/eal/common/eal_common_devargs.c:183–247

}

int
rte_devargs_parse(struct rte_devargs *da, const char *dev)
{
	struct rte_bus *bus = NULL;
	const char *devname;
	const size_t maxlen = sizeof(da->name);
	size_t i;

	if (da == NULL)
		return -EINVAL;
	memset(da, 0, sizeof(*da));

	/* First parse according global device syntax. */
	if (rte_devargs_layers_parse(da, dev) == 0) {
		if (da->bus != NULL || da->cls != NULL)
			return 0;
		rte_devargs_reset(da);
	}

	/* Otherwise fallback to legacy syntax: */

	/* Retrieve eventual bus info */
	do {
		devname = dev;
		bus = rte_bus_find(bus, bus_name_cmp, dev);
		if (bus == NULL)
			break;
		devname = dev + strlen(bus->name) + 1;
		if (rte_bus_find_by_device_name(devname) == bus)
			break;
	} while (1);
	/* Store device name */
	i = 0;
	while (devname[i] != '\0' && devname[i] != ',') {
		da->name[i] = devname[i];
		i++;
		if (i == maxlen) {
			RTE_LOG(WARNING, EAL, "Parsing \"%s\": device name should be shorter than %zu\n",
				dev, maxlen);
			da->name[i - 1] = '\0';
			return -EINVAL;
		}
	}
	da->name[i] = '\0';
	if (bus == NULL) {
		bus = rte_bus_find_by_device_name(da->name);
		if (bus == NULL) {
			RTE_LOG(ERR, EAL, "failed to parse device \"%s\"\n",
				da->name);
			return -EFAULT;
		}
	}
	da->bus = bus;
	/* Parse eventual device arguments */
	if (devname[i] == ',')
		da->data = strdup(&devname[i + 1]);
	else
		da->data = strdup("");