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/*
* Copyright (c) 2016 Karol Mroz. All rights reserved.
* Copyright (c) 2016 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2016 Cisco Systems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "opal_config.h"
#include <string.h>
#include <limits.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_LINUX_ETHTOOL_H
#include <linux/ethtool.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_LINUX_SOCKIOS_H
#include <linux/sockios.h>
#endif
#include "opal/util/ethtool.h"
#include "opal/util/if.h"
/*
* Obtain an appropriate bandwidth for the interface if_name. On Linux, we
* get this via an ioctl(). Elsewhere or in the error case, we return the
* speed as 0.
*/
unsigned int
opal_ethtool_get_speed (const char *if_name)
{
unsigned int speed = 0;
#if defined(HAVE_DECL_SIOCETHTOOL) && defined(HAVE_STRUCT_IFREQ) && defined(HAVE_STRUCT_ETHTOOL_CMD)
int sockfd;
struct ifreq ifr;
struct ethtool_cmd edata = {
.cmd = ETHTOOL_GSET,
};
sockfd = socket(PF_INET, SOCK_DGRAM, 0);
if (sockfd < 0) {
goto out;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifr.ifr_name, if_name, IF_NAMESIZE);
/* strncpy does not null terminate when the string is truncated */
ifr.ifr_name[IF_NAMESIZE-1] = '\0';
ifr.ifr_data = (char *)&edata;
if (ioctl(sockfd, SIOCETHTOOL, &ifr) < 0) {
goto out;
}
#if HAVE_DECL_ETHTOOL_CMD_SPEED
speed = ethtool_cmd_speed(&edata);
#elif defined(HAVE_STRUCT_ETHTOOL_CMD_SPEED_HI)
speed = (edata.speed_hi << 16) | edata.speed;
#else
speed = edata.speed;
#endif
if (UINT_MAX == speed) {
speed = 0;
}
out:
close(sockfd);
#endif
return speed;
}
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