Function mlx5_ifreq_by_ifname

dpdk/drivers/net/mlx5/linux/mlx5_ethdev_os.c:198–219

* Perform ifreq ioctl() on associated netdev ifname. * * @param[in] ifname * Pointer to netdev name. * @param req * Request number to pass to ioctl(). * @param[out] ifr * Interface request structure output buffer. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */

 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
static int
mlx5_ifreq_by_ifname(const char *ifname, int req, struct ifreq *ifr)
{
	int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
	int ret = 0;

	if (sock == -1) {
		rte_errno = errno;
		return -rte_errno;
	}
	rte_strscpy(ifr->ifr_name, ifname, sizeof(ifr->ifr_name));
	ret = ioctl(sock, req, ifr);
	if (ret == -1) {
		rte_errno = errno;
		goto error;
	}
	close(sock);
	return 0;
error:
	close(sock);
	return -rte_errno;
}

/**
 * Perform ifreq ioctl() on associated Ethernet device.