+static int
+bus_name_cmp(const struct rte_bus *bus, const void *name)
+{
+ return strncmp(bus->name, name, strlen(bus->name));
+}
+
+int __rte_experimental
+rte_devargs_parse(struct rte_devargs *da, const char *format, ...)
+{
+ struct rte_bus *bus = NULL;
+ va_list ap;
+ va_start(ap, format);
+ char dev[vsnprintf(NULL, 0, format, ap) + 1];
+ const char *devname;
+ const size_t maxlen = sizeof(da->name);
+ size_t i;
+
+ va_end(ap);
+ if (da == NULL)
+ return -EINVAL;
+
+ va_start(ap, format);
+ vsnprintf(dev, sizeof(dev), format, ap);
+ va_end(ap);
+ /* 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) {
+ fprintf(stderr, "WARNING: 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) {
+ fprintf(stderr, "ERROR: failed to parse device \"%s\"\n",
+ da->name);
+ return -EFAULT;
+ }
+ }
+ da->bus = bus;
+ /* Parse eventual device arguments */
+ if (devname[i] == ',')
+ da->args = strdup(&devname[i + 1]);
+ else
+ da->args = strdup("");
+ if (da->args == NULL) {
+ fprintf(stderr, "ERROR: not enough memory to parse arguments\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+int __rte_experimental
+rte_devargs_insert(struct rte_devargs *da)
+{
+ int ret;
+
+ ret = rte_devargs_remove(da->bus->name, da->name);
+ if (ret < 0)
+ return ret;
+ TAILQ_INSERT_TAIL(&devargs_list, da, next);
+ return 0;
+}
+