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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/ioctl.h>
#include <net/if.h>
#include <linux/ethtool.h>
#include <linux/sockios.h>
#include "ethtool-util.h"
#include "strxcpyx.h"
#include "util.h"
#include "log.h"
#include "conf-parser.h"
static const char* const duplex_table[_DUP_MAX] = {
[DUP_FULL] = "full",
[DUP_HALF] = "half"
};
DEFINE_STRING_TABLE_LOOKUP(duplex, Duplex);
DEFINE_CONFIG_PARSE_ENUM(config_parse_duplex, duplex, Duplex, "Failed to parse duplex setting");
static const char* const wol_table[_WOL_MAX] = {
[WOL_PHY] = "phy",
[WOL_MAGIC] = "magic",
[WOL_OFF] = "off"
};
DEFINE_STRING_TABLE_LOOKUP(wol, WakeOnLan);
DEFINE_CONFIG_PARSE_ENUM(config_parse_wol, wol, WakeOnLan, "Failed to parse WakeOnLan setting");
int ethtool_connect(int *ret) {
int fd;
assert_return(ret, -EINVAL);
fd = socket(PF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
return -errno;
}
*ret = fd;
return 0;
}
int ethtool_get_driver(int *fd, const char *ifname, char **ret) {
struct ethtool_drvinfo ecmd = {
.cmd = ETHTOOL_GDRVINFO
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
char *d;
int r;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0) {
log_warning_errno(-r, "link_config: could not connect to ethtool: %m");
return r;
}
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
d = strdup(ecmd.driver);
if (!d)
return -ENOMEM;
*ret = d;
return 0;
}
int ethtool_set_speed(int *fd, const char *ifname, unsigned int speed, Duplex duplex)
{
struct ethtool_cmd ecmd = {
.cmd = ETHTOOL_GSET
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
bool need_update = false;
int r;
if (speed == 0 && duplex == _DUP_INVALID)
return 0;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0) {
log_warning_errno(-r, "link_config: could not connect to ethtool: %m");
return r;
}
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
if (ethtool_cmd_speed(&ecmd) != speed) {
ethtool_cmd_speed_set(&ecmd, speed);
need_update = true;
}
switch (duplex) {
case DUP_HALF:
if (ecmd.duplex != DUPLEX_HALF) {
ecmd.duplex = DUPLEX_HALF;
need_update = true;
}
break;
case DUP_FULL:
if (ecmd.duplex != DUPLEX_FULL) {
ecmd.duplex = DUPLEX_FULL;
need_update = true;
}
break;
default:
break;
}
if (need_update) {
ecmd.cmd = ETHTOOL_SSET;
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
}
return 0;
}
int ethtool_set_wol(int *fd, const char *ifname, WakeOnLan wol) {
struct ethtool_wolinfo ecmd = {
.cmd = ETHTOOL_GWOL
};
struct ifreq ifr = {
.ifr_data = (void*) &ecmd
};
bool need_update = false;
int r;
if (wol == _WOL_INVALID)
return 0;
if (*fd < 0) {
r = ethtool_connect(fd);
if (r < 0) {
log_warning_errno(-r, "link_config: could not connect to ethtool: %m");
return r;
}
}
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
switch (wol) {
case WOL_PHY:
if (ecmd.wolopts != WAKE_PHY) {
ecmd.wolopts = WAKE_PHY;
need_update = true;
}
break;
case WOL_MAGIC:
if (ecmd.wolopts != WAKE_MAGIC) {
ecmd.wolopts = WAKE_MAGIC;
need_update = true;
}
break;
case WOL_OFF:
if (ecmd.wolopts != 0) {
ecmd.wolopts = 0;
need_update = true;
}
break;
default:
break;
}
if (need_update) {
ecmd.cmd = ETHTOOL_SWOL;
r = ioctl(*fd, SIOCETHTOOL, &ifr);
if (r < 0)
return -errno;
}
return 0;
}
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