584 lines
18 KiB
C
584 lines
18 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <net/if.h>
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#include <sys/ioctl.h>
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#include <linux/ethtool.h>
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#include <linux/sockios.h>
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#include "conf-parser.h"
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#include "ethtool-util.h"
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#include "link-config.h"
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#include "log.h"
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#include "missing.h"
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#include "socket-util.h"
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#include "string-table.h"
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#include "strxcpyx.h"
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#include "util.h"
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static const char* const duplex_table[_DUP_MAX] = {
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[DUP_FULL] = "full",
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[DUP_HALF] = "half"
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};
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DEFINE_STRING_TABLE_LOOKUP(duplex, Duplex);
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DEFINE_CONFIG_PARSE_ENUM(config_parse_duplex, duplex, Duplex, "Failed to parse duplex setting");
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static const char* const wol_table[_WOL_MAX] = {
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[WOL_PHY] = "phy",
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[WOL_UCAST] = "unicast",
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[WOL_MCAST] = "multicast",
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[WOL_BCAST] = "broadcast",
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[WOL_ARP] = "arp",
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[WOL_MAGIC] = "magic",
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[WOL_MAGICSECURE] = "secureon",
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[WOL_OFF] = "off"
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};
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DEFINE_STRING_TABLE_LOOKUP(wol, WakeOnLan);
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DEFINE_CONFIG_PARSE_ENUM(config_parse_wol, wol, WakeOnLan, "Failed to parse WakeOnLan setting");
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static const char* const port_table[_NET_DEV_PORT_MAX] = {
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[NET_DEV_PORT_TP] = "tp",
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[NET_DEV_PORT_AUI] = "aui",
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[NET_DEV_PORT_MII] = "mii",
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[NET_DEV_PORT_FIBRE] = "fibre",
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[NET_DEV_PORT_BNC] = "bnc"
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};
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DEFINE_STRING_TABLE_LOOKUP(port, NetDevPort);
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DEFINE_CONFIG_PARSE_ENUM(config_parse_port, port, NetDevPort, "Failed to parse Port setting");
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static const char* const netdev_feature_table[_NET_DEV_FEAT_MAX] = {
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[NET_DEV_FEAT_GSO] = "tx-generic-segmentation",
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[NET_DEV_FEAT_GRO] = "rx-gro",
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[NET_DEV_FEAT_LRO] = "rx-lro",
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[NET_DEV_FEAT_TSO] = "tx-tcp-segmentation",
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[NET_DEV_FEAT_TSO6] = "tx-tcp6-segmentation",
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};
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int ethtool_connect(int *ret) {
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int fd;
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assert_return(ret, -EINVAL);
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fd = socket_ioctl_fd();
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if (fd < 0)
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return fd;
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*ret = fd;
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return 0;
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}
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int ethtool_get_driver(int *fd, const char *ifname, char **ret) {
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struct ethtool_drvinfo ecmd = {
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.cmd = ETHTOOL_GDRVINFO
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};
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struct ifreq ifr = {
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.ifr_data = (void*) &ecmd
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};
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char *d;
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int r;
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if (*fd < 0) {
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r = ethtool_connect(fd);
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if (r < 0)
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return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
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}
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strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
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r = ioctl(*fd, SIOCETHTOOL, &ifr);
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if (r < 0)
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return -errno;
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d = strdup(ecmd.driver);
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if (!d)
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return -ENOMEM;
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*ret = d;
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return 0;
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}
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int ethtool_set_speed(int *fd, const char *ifname, unsigned int speed, Duplex duplex) {
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struct ethtool_cmd ecmd = {
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.cmd = ETHTOOL_GSET
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};
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struct ifreq ifr = {
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.ifr_data = (void*) &ecmd
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};
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bool need_update = false;
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int r;
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if (speed == 0 && duplex == _DUP_INVALID)
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return 0;
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if (*fd < 0) {
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r = ethtool_connect(fd);
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if (r < 0)
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return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
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}
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strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
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r = ioctl(*fd, SIOCETHTOOL, &ifr);
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if (r < 0)
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return -errno;
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if (ethtool_cmd_speed(&ecmd) != speed) {
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ethtool_cmd_speed_set(&ecmd, speed);
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need_update = true;
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}
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switch (duplex) {
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case DUP_HALF:
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if (ecmd.duplex != DUPLEX_HALF) {
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ecmd.duplex = DUPLEX_HALF;
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need_update = true;
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}
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break;
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case DUP_FULL:
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if (ecmd.duplex != DUPLEX_FULL) {
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ecmd.duplex = DUPLEX_FULL;
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need_update = true;
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}
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break;
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default:
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break;
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}
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if (need_update) {
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ecmd.cmd = ETHTOOL_SSET;
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r = ioctl(*fd, SIOCETHTOOL, &ifr);
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if (r < 0)
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return -errno;
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}
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return 0;
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}
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int ethtool_set_wol(int *fd, const char *ifname, WakeOnLan wol) {
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struct ethtool_wolinfo ecmd = {
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.cmd = ETHTOOL_GWOL
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};
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struct ifreq ifr = {
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.ifr_data = (void*) &ecmd
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};
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bool need_update = false;
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int r;
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if (wol == _WOL_INVALID)
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return 0;
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if (*fd < 0) {
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r = ethtool_connect(fd);
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if (r < 0)
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return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
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}
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strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
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r = ioctl(*fd, SIOCETHTOOL, &ifr);
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if (r < 0)
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return -errno;
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switch (wol) {
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case WOL_PHY:
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if (ecmd.wolopts != WAKE_PHY) {
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ecmd.wolopts = WAKE_PHY;
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need_update = true;
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}
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break;
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case WOL_UCAST:
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if (ecmd.wolopts != WAKE_UCAST) {
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ecmd.wolopts = WAKE_UCAST;
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need_update = true;
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}
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break;
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case WOL_MCAST:
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if (ecmd.wolopts != WAKE_MCAST) {
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ecmd.wolopts = WAKE_MCAST;
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need_update = true;
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}
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break;
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case WOL_BCAST:
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if (ecmd.wolopts != WAKE_BCAST) {
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ecmd.wolopts = WAKE_BCAST;
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need_update = true;
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}
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break;
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case WOL_ARP:
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if (ecmd.wolopts != WAKE_ARP) {
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ecmd.wolopts = WAKE_ARP;
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need_update = true;
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}
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break;
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case WOL_MAGIC:
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if (ecmd.wolopts != WAKE_MAGIC) {
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ecmd.wolopts = WAKE_MAGIC;
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need_update = true;
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}
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break;
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case WOL_MAGICSECURE:
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if (ecmd.wolopts != WAKE_MAGICSECURE) {
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ecmd.wolopts = WAKE_MAGICSECURE;
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need_update = true;
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}
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break;
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case WOL_OFF:
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if (ecmd.wolopts != 0) {
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ecmd.wolopts = 0;
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need_update = true;
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}
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break;
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default:
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break;
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}
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if (need_update) {
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ecmd.cmd = ETHTOOL_SWOL;
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r = ioctl(*fd, SIOCETHTOOL, &ifr);
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if (r < 0)
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return -errno;
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}
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return 0;
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}
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static int get_stringset(int fd, struct ifreq *ifr, int stringset_id, struct ethtool_gstrings **gstrings) {
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_cleanup_free_ struct ethtool_gstrings *strings = NULL;
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struct {
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struct ethtool_sset_info info;
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uint32_t space;
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} buffer = {
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.info = {
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.cmd = ETHTOOL_GSSET_INFO,
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.sset_mask = UINT64_C(1) << stringset_id,
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},
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};
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unsigned len;
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int r;
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ifr->ifr_data = (void *) &buffer.info;
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r = ioctl(fd, SIOCETHTOOL, ifr);
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if (r < 0)
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return -errno;
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if (!buffer.info.sset_mask)
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return -EINVAL;
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len = buffer.info.data[0];
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strings = malloc0(sizeof(struct ethtool_gstrings) + len * ETH_GSTRING_LEN);
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if (!strings)
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return -ENOMEM;
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strings->cmd = ETHTOOL_GSTRINGS;
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strings->string_set = stringset_id;
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strings->len = len;
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ifr->ifr_data = (void *) strings;
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r = ioctl(fd, SIOCETHTOOL, ifr);
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if (r < 0)
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return -errno;
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*gstrings = TAKE_PTR(strings);
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return 0;
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}
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static int find_feature_index(struct ethtool_gstrings *strings, const char *feature) {
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unsigned i;
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for (i = 0; i < strings->len; i++) {
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if (streq((char *) &strings->data[i * ETH_GSTRING_LEN], feature))
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return i;
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}
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return -1;
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}
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int ethtool_set_features(int *fd, const char *ifname, NetDevFeature *features) {
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_cleanup_free_ struct ethtool_gstrings *strings = NULL;
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struct ethtool_sfeatures *sfeatures;
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int block, bit, i, r;
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struct ifreq ifr = {};
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if (*fd < 0) {
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r = ethtool_connect(fd);
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if (r < 0)
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return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
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}
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strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
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r = get_stringset(*fd, &ifr, ETH_SS_FEATURES, &strings);
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if (r < 0)
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return log_warning_errno(r, "link_config: could not get ethtool features for %s", ifname);
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sfeatures = alloca0(sizeof(struct ethtool_gstrings) + DIV_ROUND_UP(strings->len, 32U) * sizeof(sfeatures->features[0]));
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sfeatures->cmd = ETHTOOL_SFEATURES;
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sfeatures->size = DIV_ROUND_UP(strings->len, 32U);
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for (i = 0; i < _NET_DEV_FEAT_MAX; i++) {
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if (features[i] != -1) {
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r = find_feature_index(strings, netdev_feature_table[i]);
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if (r < 0) {
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log_warning_errno(r, "link_config: could not find feature: %s", netdev_feature_table[i]);
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continue;
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}
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block = r / 32;
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bit = r % 32;
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sfeatures->features[block].valid |= 1 << bit;
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if (features[i])
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sfeatures->features[block].requested |= 1 << bit;
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else
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sfeatures->features[block].requested &= ~(1 << bit);
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}
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}
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ifr.ifr_data = (void *) sfeatures;
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r = ioctl(*fd, SIOCETHTOOL, &ifr);
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if (r < 0)
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return log_warning_errno(r, "link_config: could not set ethtool features for %s", ifname);
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return 0;
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}
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static int get_glinksettings(int fd, struct ifreq *ifr, struct ethtool_link_usettings **g) {
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struct ecmd {
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struct ethtool_link_settings req;
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__u32 link_mode_data[3 * ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32];
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} ecmd = {
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.req.cmd = ETHTOOL_GLINKSETTINGS,
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};
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struct ethtool_link_usettings *u;
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unsigned offset;
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int r;
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/* The interaction user/kernel via the new API requires a small ETHTOOL_GLINKSETTINGS
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handshake first to agree on the length of the link mode bitmaps. If kernel doesn't
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agree with user, it returns the bitmap length it is expecting from user as a negative
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length (and cmd field is 0). When kernel and user agree, kernel returns valid info in
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all fields (ie. link mode length > 0 and cmd is ETHTOOL_GLINKSETTINGS). Based on
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https://github.com/torvalds/linux/commit/3f1ac7a700d039c61d8d8b99f28d605d489a60cf
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*/
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ifr->ifr_data = (void *) &ecmd;
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r = ioctl(fd, SIOCETHTOOL, ifr);
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if (r < 0)
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return -errno;
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if (ecmd.req.link_mode_masks_nwords >= 0 || ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
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return -EOPNOTSUPP;
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ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
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ifr->ifr_data = (void *) &ecmd;
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r = ioctl(fd, SIOCETHTOOL, ifr);
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if (r < 0)
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return -errno;
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if (ecmd.req.link_mode_masks_nwords <= 0 || ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
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return -EOPNOTSUPP;
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u = new0(struct ethtool_link_usettings , 1);
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if (!u)
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return -ENOMEM;
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ecmd.req = u->base;
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offset = 0;
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memcpy(u->link_modes.supported, &ecmd.link_mode_data[offset], 4 * ecmd.req.link_mode_masks_nwords);
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offset += ecmd.req.link_mode_masks_nwords;
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memcpy(u->link_modes.advertising, &ecmd.link_mode_data[offset], 4 * ecmd.req.link_mode_masks_nwords);
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offset += ecmd.req.link_mode_masks_nwords;
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memcpy(u->link_modes.lp_advertising, &ecmd.link_mode_data[offset], 4 * ecmd.req.link_mode_masks_nwords);
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*g = u;
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return 0;
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}
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static int get_gset(int fd, struct ifreq *ifr, struct ethtool_link_usettings **u) {
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struct ethtool_link_usettings *e;
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struct ethtool_cmd ecmd = {
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.cmd = ETHTOOL_GSET,
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};
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int r;
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ifr->ifr_data = (void *) &ecmd;
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r = ioctl(fd, SIOCETHTOOL, ifr);
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if (r < 0)
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return -errno;
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e = new0(struct ethtool_link_usettings, 1);
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if (!e)
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return -ENOMEM;
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e->base.cmd = ETHTOOL_GSET;
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e->base.link_mode_masks_nwords = 1;
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e->base.speed = ethtool_cmd_speed(&ecmd);
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e->base.duplex = ecmd.duplex;
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e->base.port = ecmd.port;
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e->base.phy_address = ecmd.phy_address;
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e->base.autoneg = ecmd.autoneg;
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e->base.mdio_support = ecmd.mdio_support;
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e->link_modes.supported[0] = ecmd.supported;
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e->link_modes.advertising[0] = ecmd.advertising;
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e->link_modes.lp_advertising[0] = ecmd.lp_advertising;
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*u = e;
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return 0;
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}
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static int set_slinksettings(int fd, struct ifreq *ifr, const struct ethtool_link_usettings *u) {
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struct {
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struct ethtool_link_settings req;
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__u32 link_mode_data[3 * ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32];
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} ecmd = {};
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unsigned int offset;
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int r;
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if (u->base.cmd != ETHTOOL_GLINKSETTINGS || u->base.link_mode_masks_nwords <= 0)
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return -EINVAL;
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ecmd.req = u->base;
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ecmd.req.cmd = ETHTOOL_SLINKSETTINGS;
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offset = 0;
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memcpy(&ecmd.link_mode_data[offset], u->link_modes.supported, 4 * ecmd.req.link_mode_masks_nwords);
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offset += ecmd.req.link_mode_masks_nwords;
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memcpy(&ecmd.link_mode_data[offset], u->link_modes.advertising, 4 * ecmd.req.link_mode_masks_nwords);
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offset += ecmd.req.link_mode_masks_nwords;
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memcpy(&ecmd.link_mode_data[offset], u->link_modes.lp_advertising, 4 * ecmd.req.link_mode_masks_nwords);
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ifr->ifr_data = (void *) &ecmd;
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r = ioctl(fd, SIOCETHTOOL, ifr);
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if (r < 0)
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return -errno;
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return 0;
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}
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static int set_sset(int fd, struct ifreq *ifr, const struct ethtool_link_usettings *u) {
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struct ethtool_cmd ecmd = {
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.cmd = ETHTOOL_SSET,
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};
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int r;
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|
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if (u->base.cmd != ETHTOOL_GSET || u->base.link_mode_masks_nwords <= 0)
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|
return -EINVAL;
|
|
|
|
ecmd.supported = u->link_modes.supported[0];
|
|
ecmd.advertising = u->link_modes.advertising[0];
|
|
ecmd.lp_advertising = u->link_modes.lp_advertising[0];
|
|
|
|
ethtool_cmd_speed_set(&ecmd, u->base.speed);
|
|
|
|
ecmd.duplex = u->base.duplex;
|
|
ecmd.port = u->base.port;
|
|
ecmd.phy_address = u->base.phy_address;
|
|
ecmd.autoneg = u->base.autoneg;
|
|
ecmd.mdio_support = u->base.mdio_support;
|
|
|
|
ifr->ifr_data = (void *) &ecmd;
|
|
|
|
r = ioctl(fd, SIOCETHTOOL, ifr);
|
|
if (r < 0)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* If autonegotiation is disabled, the speed and duplex represent the fixed link
|
|
* mode and are writable if the driver supports multiple link modes. If it is
|
|
* enabled then they are read-only. If the link is up they represent the negotiated
|
|
* link mode; if the link is down, the speed is 0, %SPEED_UNKNOWN or the highest
|
|
* enabled speed and @duplex is %DUPLEX_UNKNOWN or the best enabled duplex mode.
|
|
*/
|
|
|
|
int ethtool_set_glinksettings(int *fd, const char *ifname, struct link_config *link) {
|
|
_cleanup_free_ struct ethtool_link_usettings *u = NULL;
|
|
struct ifreq ifr = {};
|
|
int r;
|
|
|
|
if (link->autonegotiation != 0) {
|
|
log_info("link_config: autonegotiation is unset or enabled, the speed and duplex are not writable.");
|
|
return 0;
|
|
}
|
|
|
|
if (*fd < 0) {
|
|
r = ethtool_connect(fd);
|
|
if (r < 0)
|
|
return log_warning_errno(r, "link_config: could not connect to ethtool: %m");
|
|
}
|
|
|
|
strscpy(ifr.ifr_name, IFNAMSIZ, ifname);
|
|
|
|
r = get_glinksettings(*fd, &ifr, &u);
|
|
if (r < 0) {
|
|
r = get_gset(*fd, &ifr, &u);
|
|
if (r < 0)
|
|
return log_warning_errno(r, "link_config: Cannot get device settings for %s : %m", ifname);
|
|
}
|
|
|
|
if (link->speed)
|
|
u->base.speed = DIV_ROUND_UP(link->speed, 1000000);
|
|
|
|
if (link->duplex != _DUP_INVALID)
|
|
u->base.duplex = link->duplex;
|
|
|
|
if (link->port != _NET_DEV_PORT_INVALID)
|
|
u->base.port = link->port;
|
|
|
|
u->base.autoneg = link->autonegotiation;
|
|
|
|
if (u->base.cmd == ETHTOOL_GLINKSETTINGS)
|
|
r = set_slinksettings(*fd, &ifr, u);
|
|
else
|
|
r = set_sset(*fd, &ifr, u);
|
|
if (r < 0)
|
|
return log_warning_errno(r, "link_config: Cannot set device settings for %s : %m", ifname);
|
|
|
|
return r;
|
|
}
|