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authorTom Gundersen <teg@jklm.no>2013-10-26 18:54:16 +0200
committerTom Gundersen <teg@jklm.no>2013-10-26 22:09:20 +0200
commita501033335ed402c8f7e86fe41a15531ba69abd7 (patch)
treeb5e8a1a12adaaa3168a4c0cedc40c0f584190d69 /src/udev/net/ethtool-util.c
parentaf6f0d422c521374ee6a2dd92df5935a5a476ae5 (diff)
udev: link-config: add ethtool support
This adds support for setting the link speed, duplex and WakeOnLan settings. Example: [Link] SpeedMBytes=100 Duplex=half WakeOnLan=magic
Diffstat (limited to 'src/udev/net/ethtool-util.c')
-rw-r--r--src/udev/net/ethtool-util.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/src/udev/net/ethtool-util.c b/src/udev/net/ethtool-util.c
new file mode 100644
index 0000000000..0a4118c6ae
--- /dev/null
+++ b/src/udev/net/ethtool-util.c
@@ -0,0 +1,143 @@
+/*-*- 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"
+
+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_set_speed(int fd, const char *ifname, const unsigned int speed, const char *duplex)
+{
+ struct ifreq ifr;
+ struct ethtool_cmd ecmd;
+ bool need_update;
+ int r;
+
+ if (speed == 0 && !duplex)
+ return 0;
+
+ memset(&ecmd, 0x00, sizeof(struct ethtool_cmd));
+ ecmd.cmd = ETHTOOL_GSET;
+ memset(&ifr, 0x00, sizeof(struct ifreq));
+ strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
+ ifr.ifr_data = (void *)&ecmd;
+
+ 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;
+ }
+
+ if (duplex) {
+ if (streq(duplex, "half")) {
+ if (ecmd.duplex != DUPLEX_HALF) {
+ ecmd.duplex = DUPLEX_HALF;
+ need_update = true;
+ }
+ } else if (streq(duplex, "full"))
+ if (ecmd.duplex != DUPLEX_FULL) {
+ ecmd.duplex = DUPLEX_FULL;
+ need_update = true;
+ }
+ }
+
+ 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, const char *wol) {
+ struct ifreq ifr;
+ struct ethtool_wolinfo ecmd;
+ bool need_update;
+ int r;
+
+ if (!wol)
+ return 0;
+
+ memset(&ecmd, 0x00, sizeof(struct ethtool_wolinfo));
+ ecmd.cmd = ETHTOOL_GWOL;
+ memset(&ifr, 0x00, sizeof(struct ifreq));
+ strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
+ ifr.ifr_data = (void *)&ecmd;
+
+ r = ioctl(fd, SIOCETHTOOL, &ifr);
+ if (r < 0)
+ return -errno;
+
+ if (streq(wol, "phy")) {
+ if (ecmd.wolopts != WAKE_PHY) {
+ ecmd.wolopts = WAKE_PHY;
+ need_update = true;
+ }
+ } else if (streq(wol, "magic")) {
+ if (ecmd.wolopts != WAKE_MAGIC) {
+ ecmd.wolopts = WAKE_MAGIC;
+ need_update = true;
+ }
+ } else if (streq(wol, "off")) {
+ if (ecmd.wolopts != 0) {
+ ecmd.wolopts = 0;
+ need_update = true;
+ }
+ } else
+ return -EINVAL;
+
+ if (need_update) {
+ ecmd.cmd = ETHTOOL_SWOL;
+
+ r = ioctl(fd, SIOCETHTOOL, &ifr);
+ if (r < 0)
+ return -errno;
+ }
+
+ return 0;
+}