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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
This commit is contained in:
Tom Gundersen 2013-10-26 18:54:16 +02:00
parent af6f0d422c
commit a501033335
6 changed files with 215 additions and 4 deletions
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4
Makefile.am
View File

@ -2295,7 +2295,9 @@ libudev_core_la_SOURCES = \
src/udev/udev-builtin-path_id.c \
src/udev/udev-builtin-usb_id.c \
src/udev/net/link-config.h \
src/udev/net/link-config.c
src/udev/net/link-config.c \
src/udev/net/ethtool-util.h \
src/udev/net/ethtool-util.c
nodist_libudev_core_la_SOURCES = \
src/udev/keyboard-keys-from-name.h \

143
src/udev/net/ethtool-util.c Normal file
View File

@ -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;
}

25
src/udev/net/ethtool-util.h Normal file
View File

@ -0,0 +1,25 @@
/*-*- 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/>.
***/
int ethtool_connect(int *ret);
int ethtool_set_speed(int fd, const char *ifname, const unsigned int speed, const char *duplex);
int ethtool_set_wol(int fd, const char *ifname, const char *wol);

3
src/udev/net/link-config-gperf.gperf
View File

@ -19,3 +19,6 @@ Match.Path, config_parse_string, 0, offsetof(link
Match.Driver, config_parse_string, 0, offsetof(link_config, match_driver)
Match.Type, config_parse_string, 0, offsetof(link_config, match_type)
Link.Description, config_parse_string, 0, offsetof(link_config, description)
Link.SpeedMBytes, config_parse_unsigned, 0, offsetof(link_config, speed)
Link.Duplex, config_parse_string, 0, offsetof(link_config, duplex)
Link.WakeOnLan, config_parse_string, 0, offsetof(link_config, wol)

41
src/udev/net/link-config.c
View File

@ -21,6 +21,8 @@
#include "link-config.h"
#include "ethtool-util.h"
#include "util.h"
#include "log.h"
#include "strv.h"
@ -31,12 +33,15 @@
struct link_config_ctx {
LIST_HEAD(link_config, links);
int ethtool_fd;
char **link_dirs;
usec_t *link_dirs_ts_usec;
};
int link_config_ctx_new(link_config_ctx **ret) {
link_config_ctx *ctx;
int r;
if (!ret)
return -EINVAL;
@ -45,6 +50,12 @@ int link_config_ctx_new(link_config_ctx **ret) {
if (!ctx)
return -ENOMEM;
r = ethtool_connect(&ctx->ethtool_fd);
if (r < 0) {
link_config_ctx_free(ctx);
return r;
}
LIST_HEAD_INIT(ctx->links);
ctx->link_dirs = strv_new("/etc/net/links",
@ -93,6 +104,7 @@ void link_config_ctx_free(link_config_ctx *ctx) {
if (!ctx)
return;
close_nointr_nofail(ctx->ethtool_fd);
strv_free(ctx->link_dirs);
free(ctx->link_dirs_ts_usec);
link_configs_free(ctx);
@ -233,11 +245,34 @@ int link_config_apply(link_config_ctx *ctx, link_config *config, struct udev_dev
log_info("Configuring %s", name);
if (config->description) {
r = udev_device_set_sysattr_value(device, "ifalias", config->description);
r = udev_device_set_sysattr_value(device, "ifalias",
config->description);
if (r < 0)
log_warning("Could not set description of %s to '%s': %s", name, config->description, strerror(-r));
log_warning("Could not set description of %s to '%s': %s",
name, config->description, strerror(-r));
else
log_info("Set link description of %s to '%s'", name, config->description);
log_info("Set link description of %s to '%s'", name,
config->description);
}
if (config->speed || config->duplex) {
r = ethtool_set_speed(ctx->ethtool_fd, name,
config->speed, config->duplex);
if (r < 0)
log_warning("Could not set speed or duplex of %s to %u Mbytes (%s): %s",
name, config->speed, config->duplex, strerror(-r));
else
log_info("Set speed or duplex of %s to %u Mbytes (%s)", name,
config->speed, config->duplex);
}
if (config->wol) {
r = ethtool_set_wol(ctx->ethtool_fd, name, config->wol);
if (r < 0)
log_warning("Could not set WakeOnLan of %s to %s: %s",
name, config->wol, strerror(-r));
else
log_info("Set WakeOnLan of %s to %s", name, config->wol);
}
return 0;

3
src/udev/net/link-config.h
View File

@ -38,6 +38,9 @@ struct link_config {
char *match_type;
char *description;
unsigned int speed;
char *duplex;
char *wol;
LIST_FIELDS(link_config, links);
};