Function rte_devargs_layers_parse

dpdk/lib/eal/common/eal_common_devargs.c:54–175

}

int
rte_devargs_layers_parse(struct rte_devargs *devargs,
			 const char *devstr)
{
	struct {
		const char *key;
		const char *str;
		struct rte_kvargs *kvlist;
	} layers[] = {
		{ RTE_DEVARGS_KEY_BUS "=",    NULL, NULL, },
		{ RTE_DEVARGS_KEY_CLASS "=",  NULL, NULL, },
		{ RTE_DEVARGS_KEY_DRIVER "=", NULL, NULL, },
	};
	struct rte_kvargs_pair *kv = NULL;
	struct rte_kvargs *bus_kvlist = NULL;
	char *s;
	size_t nblayer = 0;
	size_t i;
	int ret = 0;
	bool allocated_data = false;

	/* If the devargs points the devstr
	 * as source data, then it should not allocate
	 * anything and keep referring only to it.
	 */
	if (devargs->data != devstr) {
		devargs->data = strdup(devstr);
		if (devargs->data == NULL) {
			RTE_LOG(ERR, EAL, "OOM\n");
			ret = -ENOMEM;
			goto get_out;
		}
		allocated_data = true;
	}
	s = devargs->data;

	while (s != NULL) {
		if (nblayer >= RTE_DIM(layers)) {
			ret = -E2BIG;
			goto get_out;
		}
		layers[nblayer].str = s;

		/* Locate next layer starts with valid layer key. */
		while (s != NULL) {
			s = strchr(s, '/');
			if (s == NULL)
				break;
			for (i = 0; i < RTE_DIM(layers); i++) {
				if (strncmp(s + 1, layers[i].key,
					    strlen(layers[i].key)) == 0) {
					*s = '\0';
					break;
				}
			}
			s++;
			if (i < RTE_DIM(layers))
				break;