forked from Minki/linux
234a8fd49d
do fix features in similar way as bonding code does Signed-off-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1661 lines
37 KiB
C
1661 lines
37 KiB
C
/*
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* net/drivers/team/team.c - Network team device driver
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* Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/rcupdate.h>
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#include <linux/errno.h>
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#include <linux/ctype.h>
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#include <linux/notifier.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/socket.h>
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#include <linux/etherdevice.h>
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#include <linux/rtnetlink.h>
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#include <net/rtnetlink.h>
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#include <net/genetlink.h>
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#include <net/netlink.h>
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#include <linux/if_team.h>
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#define DRV_NAME "team"
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/**********
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* Helpers
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**********/
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#define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
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static struct team_port *team_port_get_rcu(const struct net_device *dev)
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{
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struct team_port *port = rcu_dereference(dev->rx_handler_data);
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return team_port_exists(dev) ? port : NULL;
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}
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static struct team_port *team_port_get_rtnl(const struct net_device *dev)
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{
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struct team_port *port = rtnl_dereference(dev->rx_handler_data);
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return team_port_exists(dev) ? port : NULL;
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}
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/*
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* Since the ability to change mac address for open port device is tested in
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* team_port_add, this function can be called without control of return value
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*/
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static int __set_port_mac(struct net_device *port_dev,
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const unsigned char *dev_addr)
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{
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struct sockaddr addr;
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memcpy(addr.sa_data, dev_addr, ETH_ALEN);
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addr.sa_family = ARPHRD_ETHER;
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return dev_set_mac_address(port_dev, &addr);
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}
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int team_port_set_orig_mac(struct team_port *port)
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{
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return __set_port_mac(port->dev, port->orig.dev_addr);
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}
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int team_port_set_team_mac(struct team_port *port)
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{
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return __set_port_mac(port->dev, port->team->dev->dev_addr);
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}
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EXPORT_SYMBOL(team_port_set_team_mac);
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/*******************
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* Options handling
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*******************/
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struct team_option *__team_find_option(struct team *team, const char *opt_name)
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{
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struct team_option *option;
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list_for_each_entry(option, &team->option_list, list) {
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if (strcmp(option->name, opt_name) == 0)
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return option;
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}
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return NULL;
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}
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int team_options_register(struct team *team,
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const struct team_option *option,
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size_t option_count)
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{
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int i;
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struct team_option *dst_opts[option_count];
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int err;
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memset(dst_opts, 0, sizeof(dst_opts));
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for (i = 0; i < option_count; i++, option++) {
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struct team_option *dst_opt;
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if (__team_find_option(team, option->name)) {
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err = -EEXIST;
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goto rollback;
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}
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dst_opt = kmalloc(sizeof(*option), GFP_KERNEL);
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if (!dst_opt) {
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err = -ENOMEM;
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goto rollback;
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}
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memcpy(dst_opt, option, sizeof(*option));
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dst_opts[i] = dst_opt;
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}
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for (i = 0; i < option_count; i++)
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list_add_tail(&dst_opts[i]->list, &team->option_list);
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return 0;
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rollback:
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for (i = 0; i < option_count; i++)
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kfree(dst_opts[i]);
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return err;
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}
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EXPORT_SYMBOL(team_options_register);
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static void __team_options_change_check(struct team *team,
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struct team_option *changed_option);
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static void __team_options_unregister(struct team *team,
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const struct team_option *option,
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size_t option_count)
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{
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int i;
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for (i = 0; i < option_count; i++, option++) {
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struct team_option *del_opt;
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del_opt = __team_find_option(team, option->name);
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if (del_opt) {
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list_del(&del_opt->list);
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kfree(del_opt);
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}
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}
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}
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void team_options_unregister(struct team *team,
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const struct team_option *option,
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size_t option_count)
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{
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__team_options_unregister(team, option, option_count);
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__team_options_change_check(team, NULL);
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}
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EXPORT_SYMBOL(team_options_unregister);
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static int team_option_get(struct team *team, struct team_option *option,
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void *arg)
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{
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return option->getter(team, arg);
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}
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static int team_option_set(struct team *team, struct team_option *option,
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void *arg)
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{
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int err;
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err = option->setter(team, arg);
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if (err)
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return err;
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__team_options_change_check(team, option);
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return err;
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}
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/****************
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* Mode handling
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****************/
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static LIST_HEAD(mode_list);
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static DEFINE_SPINLOCK(mode_list_lock);
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static struct team_mode *__find_mode(const char *kind)
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{
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struct team_mode *mode;
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list_for_each_entry(mode, &mode_list, list) {
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if (strcmp(mode->kind, kind) == 0)
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return mode;
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}
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return NULL;
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}
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static bool is_good_mode_name(const char *name)
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{
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while (*name != '\0') {
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if (!isalpha(*name) && !isdigit(*name) && *name != '_')
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return false;
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name++;
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}
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return true;
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}
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int team_mode_register(struct team_mode *mode)
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{
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int err = 0;
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if (!is_good_mode_name(mode->kind) ||
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mode->priv_size > TEAM_MODE_PRIV_SIZE)
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return -EINVAL;
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spin_lock(&mode_list_lock);
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if (__find_mode(mode->kind)) {
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err = -EEXIST;
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goto unlock;
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}
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list_add_tail(&mode->list, &mode_list);
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unlock:
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spin_unlock(&mode_list_lock);
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return err;
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}
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EXPORT_SYMBOL(team_mode_register);
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int team_mode_unregister(struct team_mode *mode)
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{
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spin_lock(&mode_list_lock);
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list_del_init(&mode->list);
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spin_unlock(&mode_list_lock);
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return 0;
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}
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EXPORT_SYMBOL(team_mode_unregister);
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static struct team_mode *team_mode_get(const char *kind)
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{
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struct team_mode *mode;
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spin_lock(&mode_list_lock);
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mode = __find_mode(kind);
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if (!mode) {
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spin_unlock(&mode_list_lock);
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request_module("team-mode-%s", kind);
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spin_lock(&mode_list_lock);
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mode = __find_mode(kind);
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}
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if (mode)
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if (!try_module_get(mode->owner))
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mode = NULL;
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spin_unlock(&mode_list_lock);
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return mode;
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}
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static void team_mode_put(const struct team_mode *mode)
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{
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module_put(mode->owner);
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}
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static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
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{
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dev_kfree_skb_any(skb);
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return false;
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}
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rx_handler_result_t team_dummy_receive(struct team *team,
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struct team_port *port,
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struct sk_buff *skb)
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{
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return RX_HANDLER_ANOTHER;
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}
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static void team_adjust_ops(struct team *team)
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{
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/*
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* To avoid checks in rx/tx skb paths, ensure here that non-null and
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* correct ops are always set.
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*/
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if (list_empty(&team->port_list) ||
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!team->mode || !team->mode->ops->transmit)
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team->ops.transmit = team_dummy_transmit;
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else
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team->ops.transmit = team->mode->ops->transmit;
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if (list_empty(&team->port_list) ||
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!team->mode || !team->mode->ops->receive)
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team->ops.receive = team_dummy_receive;
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else
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team->ops.receive = team->mode->ops->receive;
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}
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/*
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* We can benefit from the fact that it's ensured no port is present
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* at the time of mode change. Therefore no packets are in fly so there's no
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* need to set mode operations in any special way.
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*/
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static int __team_change_mode(struct team *team,
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const struct team_mode *new_mode)
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{
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/* Check if mode was previously set and do cleanup if so */
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if (team->mode) {
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void (*exit_op)(struct team *team) = team->ops.exit;
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/* Clear ops area so no callback is called any longer */
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memset(&team->ops, 0, sizeof(struct team_mode_ops));
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team_adjust_ops(team);
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if (exit_op)
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exit_op(team);
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team_mode_put(team->mode);
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team->mode = NULL;
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/* zero private data area */
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memset(&team->mode_priv, 0,
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sizeof(struct team) - offsetof(struct team, mode_priv));
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}
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if (!new_mode)
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return 0;
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if (new_mode->ops->init) {
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int err;
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err = new_mode->ops->init(team);
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if (err)
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return err;
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}
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team->mode = new_mode;
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memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
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team_adjust_ops(team);
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return 0;
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}
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static int team_change_mode(struct team *team, const char *kind)
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{
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struct team_mode *new_mode;
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struct net_device *dev = team->dev;
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int err;
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if (!list_empty(&team->port_list)) {
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netdev_err(dev, "No ports can be present during mode change\n");
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return -EBUSY;
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}
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if (team->mode && strcmp(team->mode->kind, kind) == 0) {
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netdev_err(dev, "Unable to change to the same mode the team is in\n");
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return -EINVAL;
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}
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new_mode = team_mode_get(kind);
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if (!new_mode) {
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netdev_err(dev, "Mode \"%s\" not found\n", kind);
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return -EINVAL;
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}
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err = __team_change_mode(team, new_mode);
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if (err) {
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netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
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team_mode_put(new_mode);
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return err;
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}
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netdev_info(dev, "Mode changed to \"%s\"\n", kind);
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return 0;
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}
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/************************
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* Rx path frame handler
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************************/
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/* note: already called with rcu_read_lock */
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static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
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{
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struct sk_buff *skb = *pskb;
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struct team_port *port;
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struct team *team;
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rx_handler_result_t res;
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skb = skb_share_check(skb, GFP_ATOMIC);
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if (!skb)
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return RX_HANDLER_CONSUMED;
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*pskb = skb;
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port = team_port_get_rcu(skb->dev);
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team = port->team;
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res = team->ops.receive(team, port, skb);
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if (res == RX_HANDLER_ANOTHER) {
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struct team_pcpu_stats *pcpu_stats;
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pcpu_stats = this_cpu_ptr(team->pcpu_stats);
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u64_stats_update_begin(&pcpu_stats->syncp);
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pcpu_stats->rx_packets++;
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pcpu_stats->rx_bytes += skb->len;
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if (skb->pkt_type == PACKET_MULTICAST)
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pcpu_stats->rx_multicast++;
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u64_stats_update_end(&pcpu_stats->syncp);
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skb->dev = team->dev;
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} else {
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this_cpu_inc(team->pcpu_stats->rx_dropped);
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}
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return res;
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}
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/****************
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* Port handling
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****************/
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static bool team_port_find(const struct team *team,
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const struct team_port *port)
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{
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struct team_port *cur;
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list_for_each_entry(cur, &team->port_list, list)
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if (cur == port)
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return true;
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return false;
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}
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/*
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* Add/delete port to the team port list. Write guarded by rtnl_lock.
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* Takes care of correct port->index setup (might be racy).
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*/
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static void team_port_list_add_port(struct team *team,
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struct team_port *port)
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{
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port->index = team->port_count++;
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hlist_add_head_rcu(&port->hlist,
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team_port_index_hash(team, port->index));
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list_add_tail_rcu(&port->list, &team->port_list);
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}
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static void __reconstruct_port_hlist(struct team *team, int rm_index)
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{
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int i;
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struct team_port *port;
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for (i = rm_index + 1; i < team->port_count; i++) {
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port = team_get_port_by_index(team, i);
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hlist_del_rcu(&port->hlist);
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port->index--;
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hlist_add_head_rcu(&port->hlist,
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team_port_index_hash(team, port->index));
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}
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}
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static void team_port_list_del_port(struct team *team,
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struct team_port *port)
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{
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int rm_index = port->index;
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hlist_del_rcu(&port->hlist);
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list_del_rcu(&port->list);
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__reconstruct_port_hlist(team, rm_index);
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team->port_count--;
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}
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#define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
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NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
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NETIF_F_HIGHDMA | NETIF_F_LRO)
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static void __team_compute_features(struct team *team)
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{
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struct team_port *port;
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u32 vlan_features = TEAM_VLAN_FEATURES;
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unsigned short max_hard_header_len = ETH_HLEN;
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list_for_each_entry(port, &team->port_list, list) {
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vlan_features = netdev_increment_features(vlan_features,
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port->dev->vlan_features,
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TEAM_VLAN_FEATURES);
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if (port->dev->hard_header_len > max_hard_header_len)
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max_hard_header_len = port->dev->hard_header_len;
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}
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team->dev->vlan_features = vlan_features;
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team->dev->hard_header_len = max_hard_header_len;
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netdev_change_features(team->dev);
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}
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static void team_compute_features(struct team *team)
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{
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mutex_lock(&team->lock);
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__team_compute_features(team);
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mutex_unlock(&team->lock);
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}
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static int team_port_enter(struct team *team, struct team_port *port)
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{
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int err = 0;
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dev_hold(team->dev);
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port->dev->priv_flags |= IFF_TEAM_PORT;
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if (team->ops.port_enter) {
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err = team->ops.port_enter(team, port);
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if (err) {
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netdev_err(team->dev, "Device %s failed to enter team mode\n",
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port->dev->name);
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goto err_port_enter;
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}
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}
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return 0;
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err_port_enter:
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port->dev->priv_flags &= ~IFF_TEAM_PORT;
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dev_put(team->dev);
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return err;
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}
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|
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static void team_port_leave(struct team *team, struct team_port *port)
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{
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if (team->ops.port_leave)
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team->ops.port_leave(team, port);
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port->dev->priv_flags &= ~IFF_TEAM_PORT;
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dev_put(team->dev);
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}
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|
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static void __team_port_change_check(struct team_port *port, bool linkup);
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|
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static int team_port_add(struct team *team, struct net_device *port_dev)
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{
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struct net_device *dev = team->dev;
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struct team_port *port;
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char *portname = port_dev->name;
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int err;
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|
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if (port_dev->flags & IFF_LOOPBACK ||
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port_dev->type != ARPHRD_ETHER) {
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netdev_err(dev, "Device %s is of an unsupported type\n",
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portname);
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return -EINVAL;
|
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}
|
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|
|
if (team_port_exists(port_dev)) {
|
|
netdev_err(dev, "Device %s is already a port "
|
|
"of a team device\n", portname);
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (port_dev->flags & IFF_UP) {
|
|
netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
|
|
portname);
|
|
return -EBUSY;
|
|
}
|
|
|
|
port = kzalloc(sizeof(struct team_port), GFP_KERNEL);
|
|
if (!port)
|
|
return -ENOMEM;
|
|
|
|
port->dev = port_dev;
|
|
port->team = team;
|
|
|
|
port->orig.mtu = port_dev->mtu;
|
|
err = dev_set_mtu(port_dev, dev->mtu);
|
|
if (err) {
|
|
netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
|
|
goto err_set_mtu;
|
|
}
|
|
|
|
memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
|
|
|
|
err = team_port_enter(team, port);
|
|
if (err) {
|
|
netdev_err(dev, "Device %s failed to enter team mode\n",
|
|
portname);
|
|
goto err_port_enter;
|
|
}
|
|
|
|
err = dev_open(port_dev);
|
|
if (err) {
|
|
netdev_dbg(dev, "Device %s opening failed\n",
|
|
portname);
|
|
goto err_dev_open;
|
|
}
|
|
|
|
err = netdev_set_master(port_dev, dev);
|
|
if (err) {
|
|
netdev_err(dev, "Device %s failed to set master\n", portname);
|
|
goto err_set_master;
|
|
}
|
|
|
|
err = netdev_rx_handler_register(port_dev, team_handle_frame,
|
|
port);
|
|
if (err) {
|
|
netdev_err(dev, "Device %s failed to register rx_handler\n",
|
|
portname);
|
|
goto err_handler_register;
|
|
}
|
|
|
|
team_port_list_add_port(team, port);
|
|
team_adjust_ops(team);
|
|
__team_compute_features(team);
|
|
__team_port_change_check(port, !!netif_carrier_ok(port_dev));
|
|
|
|
netdev_info(dev, "Port device %s added\n", portname);
|
|
|
|
return 0;
|
|
|
|
err_handler_register:
|
|
netdev_set_master(port_dev, NULL);
|
|
|
|
err_set_master:
|
|
dev_close(port_dev);
|
|
|
|
err_dev_open:
|
|
team_port_leave(team, port);
|
|
team_port_set_orig_mac(port);
|
|
|
|
err_port_enter:
|
|
dev_set_mtu(port_dev, port->orig.mtu);
|
|
|
|
err_set_mtu:
|
|
kfree(port);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int team_port_del(struct team *team, struct net_device *port_dev)
|
|
{
|
|
struct net_device *dev = team->dev;
|
|
struct team_port *port;
|
|
char *portname = port_dev->name;
|
|
|
|
port = team_port_get_rtnl(port_dev);
|
|
if (!port || !team_port_find(team, port)) {
|
|
netdev_err(dev, "Device %s does not act as a port of this team\n",
|
|
portname);
|
|
return -ENOENT;
|
|
}
|
|
|
|
__team_port_change_check(port, false);
|
|
team_port_list_del_port(team, port);
|
|
team_adjust_ops(team);
|
|
netdev_rx_handler_unregister(port_dev);
|
|
netdev_set_master(port_dev, NULL);
|
|
dev_close(port_dev);
|
|
team_port_leave(team, port);
|
|
team_port_set_orig_mac(port);
|
|
dev_set_mtu(port_dev, port->orig.mtu);
|
|
synchronize_rcu();
|
|
kfree(port);
|
|
netdev_info(dev, "Port device %s removed\n", portname);
|
|
__team_compute_features(team);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*****************
|
|
* Net device ops
|
|
*****************/
|
|
|
|
static const char team_no_mode_kind[] = "*NOMODE*";
|
|
|
|
static int team_mode_option_get(struct team *team, void *arg)
|
|
{
|
|
const char **str = arg;
|
|
|
|
*str = team->mode ? team->mode->kind : team_no_mode_kind;
|
|
return 0;
|
|
}
|
|
|
|
static int team_mode_option_set(struct team *team, void *arg)
|
|
{
|
|
const char **str = arg;
|
|
|
|
return team_change_mode(team, *str);
|
|
}
|
|
|
|
static const struct team_option team_options[] = {
|
|
{
|
|
.name = "mode",
|
|
.type = TEAM_OPTION_TYPE_STRING,
|
|
.getter = team_mode_option_get,
|
|
.setter = team_mode_option_set,
|
|
},
|
|
};
|
|
|
|
static int team_init(struct net_device *dev)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
int i;
|
|
int err;
|
|
|
|
team->dev = dev;
|
|
mutex_init(&team->lock);
|
|
|
|
team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
|
|
if (!team->pcpu_stats)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
|
|
INIT_HLIST_HEAD(&team->port_hlist[i]);
|
|
INIT_LIST_HEAD(&team->port_list);
|
|
|
|
team_adjust_ops(team);
|
|
|
|
INIT_LIST_HEAD(&team->option_list);
|
|
err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
|
|
if (err)
|
|
goto err_options_register;
|
|
netif_carrier_off(dev);
|
|
|
|
return 0;
|
|
|
|
err_options_register:
|
|
free_percpu(team->pcpu_stats);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void team_uninit(struct net_device *dev)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
struct team_port *port;
|
|
struct team_port *tmp;
|
|
|
|
mutex_lock(&team->lock);
|
|
list_for_each_entry_safe(port, tmp, &team->port_list, list)
|
|
team_port_del(team, port->dev);
|
|
|
|
__team_change_mode(team, NULL); /* cleanup */
|
|
__team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
|
|
mutex_unlock(&team->lock);
|
|
}
|
|
|
|
static void team_destructor(struct net_device *dev)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
|
|
free_percpu(team->pcpu_stats);
|
|
free_netdev(dev);
|
|
}
|
|
|
|
static int team_open(struct net_device *dev)
|
|
{
|
|
netif_carrier_on(dev);
|
|
return 0;
|
|
}
|
|
|
|
static int team_close(struct net_device *dev)
|
|
{
|
|
netif_carrier_off(dev);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* note: already called with rcu_read_lock
|
|
*/
|
|
static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
bool tx_success = false;
|
|
unsigned int len = skb->len;
|
|
|
|
tx_success = team->ops.transmit(team, skb);
|
|
if (tx_success) {
|
|
struct team_pcpu_stats *pcpu_stats;
|
|
|
|
pcpu_stats = this_cpu_ptr(team->pcpu_stats);
|
|
u64_stats_update_begin(&pcpu_stats->syncp);
|
|
pcpu_stats->tx_packets++;
|
|
pcpu_stats->tx_bytes += len;
|
|
u64_stats_update_end(&pcpu_stats->syncp);
|
|
} else {
|
|
this_cpu_inc(team->pcpu_stats->tx_dropped);
|
|
}
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static void team_change_rx_flags(struct net_device *dev, int change)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
struct team_port *port;
|
|
int inc;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(port, &team->port_list, list) {
|
|
if (change & IFF_PROMISC) {
|
|
inc = dev->flags & IFF_PROMISC ? 1 : -1;
|
|
dev_set_promiscuity(port->dev, inc);
|
|
}
|
|
if (change & IFF_ALLMULTI) {
|
|
inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
|
|
dev_set_allmulti(port->dev, inc);
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static void team_set_rx_mode(struct net_device *dev)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
struct team_port *port;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(port, &team->port_list, list) {
|
|
dev_uc_sync(port->dev, dev);
|
|
dev_mc_sync(port->dev, dev);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static int team_set_mac_address(struct net_device *dev, void *p)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
struct team_port *port;
|
|
struct sockaddr *addr = p;
|
|
|
|
memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(port, &team->port_list, list)
|
|
if (team->ops.port_change_mac)
|
|
team->ops.port_change_mac(team, port);
|
|
rcu_read_unlock();
|
|
return 0;
|
|
}
|
|
|
|
static int team_change_mtu(struct net_device *dev, int new_mtu)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
struct team_port *port;
|
|
int err;
|
|
|
|
/*
|
|
* Alhough this is reader, it's guarded by team lock. It's not possible
|
|
* to traverse list in reverse under rcu_read_lock
|
|
*/
|
|
mutex_lock(&team->lock);
|
|
list_for_each_entry(port, &team->port_list, list) {
|
|
err = dev_set_mtu(port->dev, new_mtu);
|
|
if (err) {
|
|
netdev_err(dev, "Device %s failed to change mtu",
|
|
port->dev->name);
|
|
goto unwind;
|
|
}
|
|
}
|
|
mutex_unlock(&team->lock);
|
|
|
|
dev->mtu = new_mtu;
|
|
|
|
return 0;
|
|
|
|
unwind:
|
|
list_for_each_entry_continue_reverse(port, &team->port_list, list)
|
|
dev_set_mtu(port->dev, dev->mtu);
|
|
mutex_unlock(&team->lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static struct rtnl_link_stats64 *
|
|
team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
struct team_pcpu_stats *p;
|
|
u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
|
|
u32 rx_dropped = 0, tx_dropped = 0;
|
|
unsigned int start;
|
|
int i;
|
|
|
|
for_each_possible_cpu(i) {
|
|
p = per_cpu_ptr(team->pcpu_stats, i);
|
|
do {
|
|
start = u64_stats_fetch_begin_bh(&p->syncp);
|
|
rx_packets = p->rx_packets;
|
|
rx_bytes = p->rx_bytes;
|
|
rx_multicast = p->rx_multicast;
|
|
tx_packets = p->tx_packets;
|
|
tx_bytes = p->tx_bytes;
|
|
} while (u64_stats_fetch_retry_bh(&p->syncp, start));
|
|
|
|
stats->rx_packets += rx_packets;
|
|
stats->rx_bytes += rx_bytes;
|
|
stats->multicast += rx_multicast;
|
|
stats->tx_packets += tx_packets;
|
|
stats->tx_bytes += tx_bytes;
|
|
/*
|
|
* rx_dropped & tx_dropped are u32, updated
|
|
* without syncp protection.
|
|
*/
|
|
rx_dropped += p->rx_dropped;
|
|
tx_dropped += p->tx_dropped;
|
|
}
|
|
stats->rx_dropped = rx_dropped;
|
|
stats->tx_dropped = tx_dropped;
|
|
return stats;
|
|
}
|
|
|
|
static void team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
struct team_port *port;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(port, &team->port_list, list) {
|
|
const struct net_device_ops *ops = port->dev->netdev_ops;
|
|
|
|
if (ops->ndo_vlan_rx_add_vid)
|
|
ops->ndo_vlan_rx_add_vid(port->dev, vid);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static void team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
struct team_port *port;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(port, &team->port_list, list) {
|
|
const struct net_device_ops *ops = port->dev->netdev_ops;
|
|
|
|
if (ops->ndo_vlan_rx_kill_vid)
|
|
ops->ndo_vlan_rx_kill_vid(port->dev, vid);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
int err;
|
|
|
|
mutex_lock(&team->lock);
|
|
err = team_port_add(team, port_dev);
|
|
mutex_unlock(&team->lock);
|
|
return err;
|
|
}
|
|
|
|
static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
|
|
{
|
|
struct team *team = netdev_priv(dev);
|
|
int err;
|
|
|
|
mutex_lock(&team->lock);
|
|
err = team_port_del(team, port_dev);
|
|
mutex_unlock(&team->lock);
|
|
return err;
|
|
}
|
|
|
|
static netdev_features_t team_fix_features(struct net_device *dev,
|
|
netdev_features_t features)
|
|
{
|
|
struct team_port *port;
|
|
struct team *team = netdev_priv(dev);
|
|
netdev_features_t mask;
|
|
|
|
mask = features;
|
|
features &= ~NETIF_F_ONE_FOR_ALL;
|
|
features |= NETIF_F_ALL_FOR_ALL;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(port, &team->port_list, list) {
|
|
features = netdev_increment_features(features,
|
|
port->dev->features,
|
|
mask);
|
|
}
|
|
rcu_read_unlock();
|
|
return features;
|
|
}
|
|
|
|
static const struct net_device_ops team_netdev_ops = {
|
|
.ndo_init = team_init,
|
|
.ndo_uninit = team_uninit,
|
|
.ndo_open = team_open,
|
|
.ndo_stop = team_close,
|
|
.ndo_start_xmit = team_xmit,
|
|
.ndo_change_rx_flags = team_change_rx_flags,
|
|
.ndo_set_rx_mode = team_set_rx_mode,
|
|
.ndo_set_mac_address = team_set_mac_address,
|
|
.ndo_change_mtu = team_change_mtu,
|
|
.ndo_get_stats64 = team_get_stats64,
|
|
.ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
|
|
.ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
|
|
.ndo_add_slave = team_add_slave,
|
|
.ndo_del_slave = team_del_slave,
|
|
.ndo_fix_features = team_fix_features,
|
|
};
|
|
|
|
|
|
/***********************
|
|
* rt netlink interface
|
|
***********************/
|
|
|
|
static void team_setup(struct net_device *dev)
|
|
{
|
|
ether_setup(dev);
|
|
|
|
dev->netdev_ops = &team_netdev_ops;
|
|
dev->destructor = team_destructor;
|
|
dev->tx_queue_len = 0;
|
|
dev->flags |= IFF_MULTICAST;
|
|
dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
|
|
|
|
/*
|
|
* Indicate we support unicast address filtering. That way core won't
|
|
* bring us to promisc mode in case a unicast addr is added.
|
|
* Let this up to underlay drivers.
|
|
*/
|
|
dev->priv_flags |= IFF_UNICAST_FLT;
|
|
|
|
dev->features |= NETIF_F_LLTX;
|
|
dev->features |= NETIF_F_GRO;
|
|
dev->hw_features = NETIF_F_HW_VLAN_TX |
|
|
NETIF_F_HW_VLAN_RX |
|
|
NETIF_F_HW_VLAN_FILTER;
|
|
|
|
dev->features |= dev->hw_features;
|
|
}
|
|
|
|
static int team_newlink(struct net *src_net, struct net_device *dev,
|
|
struct nlattr *tb[], struct nlattr *data[])
|
|
{
|
|
int err;
|
|
|
|
if (tb[IFLA_ADDRESS] == NULL)
|
|
random_ether_addr(dev->dev_addr);
|
|
|
|
err = register_netdevice(dev);
|
|
if (err)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int team_validate(struct nlattr *tb[], struct nlattr *data[])
|
|
{
|
|
if (tb[IFLA_ADDRESS]) {
|
|
if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
|
|
return -EINVAL;
|
|
if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
|
|
return -EADDRNOTAVAIL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct rtnl_link_ops team_link_ops __read_mostly = {
|
|
.kind = DRV_NAME,
|
|
.priv_size = sizeof(struct team),
|
|
.setup = team_setup,
|
|
.newlink = team_newlink,
|
|
.validate = team_validate,
|
|
};
|
|
|
|
|
|
/***********************************
|
|
* Generic netlink custom interface
|
|
***********************************/
|
|
|
|
static struct genl_family team_nl_family = {
|
|
.id = GENL_ID_GENERATE,
|
|
.name = TEAM_GENL_NAME,
|
|
.version = TEAM_GENL_VERSION,
|
|
.maxattr = TEAM_ATTR_MAX,
|
|
.netnsok = true,
|
|
};
|
|
|
|
static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
|
|
[TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
|
|
[TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
|
|
[TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
|
|
[TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
|
|
};
|
|
|
|
static const struct nla_policy
|
|
team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
|
|
[TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
|
|
[TEAM_ATTR_OPTION_NAME] = {
|
|
.type = NLA_STRING,
|
|
.len = TEAM_STRING_MAX_LEN,
|
|
},
|
|
[TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
|
|
[TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
|
|
[TEAM_ATTR_OPTION_DATA] = {
|
|
.type = NLA_BINARY,
|
|
.len = TEAM_STRING_MAX_LEN,
|
|
},
|
|
};
|
|
|
|
static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct sk_buff *msg;
|
|
void *hdr;
|
|
int err;
|
|
|
|
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
|
|
&team_nl_family, 0, TEAM_CMD_NOOP);
|
|
if (IS_ERR(hdr)) {
|
|
err = PTR_ERR(hdr);
|
|
goto err_msg_put;
|
|
}
|
|
|
|
genlmsg_end(msg, hdr);
|
|
|
|
return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
|
|
|
|
err_msg_put:
|
|
nlmsg_free(msg);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Netlink cmd functions should be locked by following two functions.
|
|
* Since dev gets held here, that ensures dev won't disappear in between.
|
|
*/
|
|
static struct team *team_nl_team_get(struct genl_info *info)
|
|
{
|
|
struct net *net = genl_info_net(info);
|
|
int ifindex;
|
|
struct net_device *dev;
|
|
struct team *team;
|
|
|
|
if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
|
|
return NULL;
|
|
|
|
ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
|
|
dev = dev_get_by_index(net, ifindex);
|
|
if (!dev || dev->netdev_ops != &team_netdev_ops) {
|
|
if (dev)
|
|
dev_put(dev);
|
|
return NULL;
|
|
}
|
|
|
|
team = netdev_priv(dev);
|
|
mutex_lock(&team->lock);
|
|
return team;
|
|
}
|
|
|
|
static void team_nl_team_put(struct team *team)
|
|
{
|
|
mutex_unlock(&team->lock);
|
|
dev_put(team->dev);
|
|
}
|
|
|
|
static int team_nl_send_generic(struct genl_info *info, struct team *team,
|
|
int (*fill_func)(struct sk_buff *skb,
|
|
struct genl_info *info,
|
|
int flags, struct team *team))
|
|
{
|
|
struct sk_buff *skb;
|
|
int err;
|
|
|
|
skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
|
|
err = fill_func(skb, info, NLM_F_ACK, team);
|
|
if (err < 0)
|
|
goto err_fill;
|
|
|
|
err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
|
|
return err;
|
|
|
|
err_fill:
|
|
nlmsg_free(skb);
|
|
return err;
|
|
}
|
|
|
|
static int team_nl_fill_options_get_changed(struct sk_buff *skb,
|
|
u32 pid, u32 seq, int flags,
|
|
struct team *team,
|
|
struct team_option *changed_option)
|
|
{
|
|
struct nlattr *option_list;
|
|
void *hdr;
|
|
struct team_option *option;
|
|
|
|
hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
|
|
TEAM_CMD_OPTIONS_GET);
|
|
if (IS_ERR(hdr))
|
|
return PTR_ERR(hdr);
|
|
|
|
NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex);
|
|
option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
|
|
if (!option_list)
|
|
return -EMSGSIZE;
|
|
|
|
list_for_each_entry(option, &team->option_list, list) {
|
|
struct nlattr *option_item;
|
|
long arg;
|
|
|
|
option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
|
|
if (!option_item)
|
|
goto nla_put_failure;
|
|
NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_NAME, option->name);
|
|
if (option == changed_option)
|
|
NLA_PUT_FLAG(skb, TEAM_ATTR_OPTION_CHANGED);
|
|
switch (option->type) {
|
|
case TEAM_OPTION_TYPE_U32:
|
|
NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32);
|
|
team_option_get(team, option, &arg);
|
|
NLA_PUT_U32(skb, TEAM_ATTR_OPTION_DATA, arg);
|
|
break;
|
|
case TEAM_OPTION_TYPE_STRING:
|
|
NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING);
|
|
team_option_get(team, option, &arg);
|
|
NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_DATA,
|
|
(char *) arg);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
nla_nest_end(skb, option_item);
|
|
}
|
|
|
|
nla_nest_end(skb, option_list);
|
|
return genlmsg_end(skb, hdr);
|
|
|
|
nla_put_failure:
|
|
genlmsg_cancel(skb, hdr);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int team_nl_fill_options_get(struct sk_buff *skb,
|
|
struct genl_info *info, int flags,
|
|
struct team *team)
|
|
{
|
|
return team_nl_fill_options_get_changed(skb, info->snd_pid,
|
|
info->snd_seq, NLM_F_ACK,
|
|
team, NULL);
|
|
}
|
|
|
|
static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct team *team;
|
|
int err;
|
|
|
|
team = team_nl_team_get(info);
|
|
if (!team)
|
|
return -EINVAL;
|
|
|
|
err = team_nl_send_generic(info, team, team_nl_fill_options_get);
|
|
|
|
team_nl_team_put(team);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct team *team;
|
|
int err = 0;
|
|
int i;
|
|
struct nlattr *nl_option;
|
|
|
|
team = team_nl_team_get(info);
|
|
if (!team)
|
|
return -EINVAL;
|
|
|
|
err = -EINVAL;
|
|
if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
|
|
err = -EINVAL;
|
|
goto team_put;
|
|
}
|
|
|
|
nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
|
|
struct nlattr *mode_attrs[TEAM_ATTR_OPTION_MAX + 1];
|
|
enum team_option_type opt_type;
|
|
struct team_option *option;
|
|
char *opt_name;
|
|
bool opt_found = false;
|
|
|
|
if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
|
|
err = -EINVAL;
|
|
goto team_put;
|
|
}
|
|
err = nla_parse_nested(mode_attrs, TEAM_ATTR_OPTION_MAX,
|
|
nl_option, team_nl_option_policy);
|
|
if (err)
|
|
goto team_put;
|
|
if (!mode_attrs[TEAM_ATTR_OPTION_NAME] ||
|
|
!mode_attrs[TEAM_ATTR_OPTION_TYPE] ||
|
|
!mode_attrs[TEAM_ATTR_OPTION_DATA]) {
|
|
err = -EINVAL;
|
|
goto team_put;
|
|
}
|
|
switch (nla_get_u8(mode_attrs[TEAM_ATTR_OPTION_TYPE])) {
|
|
case NLA_U32:
|
|
opt_type = TEAM_OPTION_TYPE_U32;
|
|
break;
|
|
case NLA_STRING:
|
|
opt_type = TEAM_OPTION_TYPE_STRING;
|
|
break;
|
|
default:
|
|
goto team_put;
|
|
}
|
|
|
|
opt_name = nla_data(mode_attrs[TEAM_ATTR_OPTION_NAME]);
|
|
list_for_each_entry(option, &team->option_list, list) {
|
|
long arg;
|
|
struct nlattr *opt_data_attr;
|
|
|
|
if (option->type != opt_type ||
|
|
strcmp(option->name, opt_name))
|
|
continue;
|
|
opt_found = true;
|
|
opt_data_attr = mode_attrs[TEAM_ATTR_OPTION_DATA];
|
|
switch (opt_type) {
|
|
case TEAM_OPTION_TYPE_U32:
|
|
arg = nla_get_u32(opt_data_attr);
|
|
break;
|
|
case TEAM_OPTION_TYPE_STRING:
|
|
arg = (long) nla_data(opt_data_attr);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
err = team_option_set(team, option, &arg);
|
|
if (err)
|
|
goto team_put;
|
|
}
|
|
if (!opt_found) {
|
|
err = -ENOENT;
|
|
goto team_put;
|
|
}
|
|
}
|
|
|
|
team_put:
|
|
team_nl_team_put(team);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int team_nl_fill_port_list_get_changed(struct sk_buff *skb,
|
|
u32 pid, u32 seq, int flags,
|
|
struct team *team,
|
|
struct team_port *changed_port)
|
|
{
|
|
struct nlattr *port_list;
|
|
void *hdr;
|
|
struct team_port *port;
|
|
|
|
hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
|
|
TEAM_CMD_PORT_LIST_GET);
|
|
if (IS_ERR(hdr))
|
|
return PTR_ERR(hdr);
|
|
|
|
NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex);
|
|
port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
|
|
if (!port_list)
|
|
return -EMSGSIZE;
|
|
|
|
list_for_each_entry(port, &team->port_list, list) {
|
|
struct nlattr *port_item;
|
|
|
|
port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
|
|
if (!port_item)
|
|
goto nla_put_failure;
|
|
NLA_PUT_U32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex);
|
|
if (port == changed_port)
|
|
NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_CHANGED);
|
|
if (port->linkup)
|
|
NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_LINKUP);
|
|
NLA_PUT_U32(skb, TEAM_ATTR_PORT_SPEED, port->speed);
|
|
NLA_PUT_U8(skb, TEAM_ATTR_PORT_DUPLEX, port->duplex);
|
|
nla_nest_end(skb, port_item);
|
|
}
|
|
|
|
nla_nest_end(skb, port_list);
|
|
return genlmsg_end(skb, hdr);
|
|
|
|
nla_put_failure:
|
|
genlmsg_cancel(skb, hdr);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static int team_nl_fill_port_list_get(struct sk_buff *skb,
|
|
struct genl_info *info, int flags,
|
|
struct team *team)
|
|
{
|
|
return team_nl_fill_port_list_get_changed(skb, info->snd_pid,
|
|
info->snd_seq, NLM_F_ACK,
|
|
team, NULL);
|
|
}
|
|
|
|
static int team_nl_cmd_port_list_get(struct sk_buff *skb,
|
|
struct genl_info *info)
|
|
{
|
|
struct team *team;
|
|
int err;
|
|
|
|
team = team_nl_team_get(info);
|
|
if (!team)
|
|
return -EINVAL;
|
|
|
|
err = team_nl_send_generic(info, team, team_nl_fill_port_list_get);
|
|
|
|
team_nl_team_put(team);
|
|
|
|
return err;
|
|
}
|
|
|
|
static struct genl_ops team_nl_ops[] = {
|
|
{
|
|
.cmd = TEAM_CMD_NOOP,
|
|
.doit = team_nl_cmd_noop,
|
|
.policy = team_nl_policy,
|
|
},
|
|
{
|
|
.cmd = TEAM_CMD_OPTIONS_SET,
|
|
.doit = team_nl_cmd_options_set,
|
|
.policy = team_nl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = TEAM_CMD_OPTIONS_GET,
|
|
.doit = team_nl_cmd_options_get,
|
|
.policy = team_nl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = TEAM_CMD_PORT_LIST_GET,
|
|
.doit = team_nl_cmd_port_list_get,
|
|
.policy = team_nl_policy,
|
|
.flags = GENL_ADMIN_PERM,
|
|
},
|
|
};
|
|
|
|
static struct genl_multicast_group team_change_event_mcgrp = {
|
|
.name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
|
|
};
|
|
|
|
static int team_nl_send_event_options_get(struct team *team,
|
|
struct team_option *changed_option)
|
|
{
|
|
struct sk_buff *skb;
|
|
int err;
|
|
struct net *net = dev_net(team->dev);
|
|
|
|
skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
|
|
err = team_nl_fill_options_get_changed(skb, 0, 0, 0, team,
|
|
changed_option);
|
|
if (err < 0)
|
|
goto err_fill;
|
|
|
|
err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
|
|
GFP_KERNEL);
|
|
return err;
|
|
|
|
err_fill:
|
|
nlmsg_free(skb);
|
|
return err;
|
|
}
|
|
|
|
static int team_nl_send_event_port_list_get(struct team_port *port)
|
|
{
|
|
struct sk_buff *skb;
|
|
int err;
|
|
struct net *net = dev_net(port->team->dev);
|
|
|
|
skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
|
|
err = team_nl_fill_port_list_get_changed(skb, 0, 0, 0,
|
|
port->team, port);
|
|
if (err < 0)
|
|
goto err_fill;
|
|
|
|
err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
|
|
GFP_KERNEL);
|
|
return err;
|
|
|
|
err_fill:
|
|
nlmsg_free(skb);
|
|
return err;
|
|
}
|
|
|
|
static int team_nl_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
|
|
ARRAY_SIZE(team_nl_ops));
|
|
if (err)
|
|
return err;
|
|
|
|
err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
|
|
if (err)
|
|
goto err_change_event_grp_reg;
|
|
|
|
return 0;
|
|
|
|
err_change_event_grp_reg:
|
|
genl_unregister_family(&team_nl_family);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void team_nl_fini(void)
|
|
{
|
|
genl_unregister_family(&team_nl_family);
|
|
}
|
|
|
|
|
|
/******************
|
|
* Change checkers
|
|
******************/
|
|
|
|
static void __team_options_change_check(struct team *team,
|
|
struct team_option *changed_option)
|
|
{
|
|
int err;
|
|
|
|
err = team_nl_send_event_options_get(team, changed_option);
|
|
if (err)
|
|
netdev_warn(team->dev, "Failed to send options change via netlink\n");
|
|
}
|
|
|
|
/* rtnl lock is held */
|
|
static void __team_port_change_check(struct team_port *port, bool linkup)
|
|
{
|
|
int err;
|
|
|
|
if (port->linkup == linkup)
|
|
return;
|
|
|
|
port->linkup = linkup;
|
|
if (linkup) {
|
|
struct ethtool_cmd ecmd;
|
|
|
|
err = __ethtool_get_settings(port->dev, &ecmd);
|
|
if (!err) {
|
|
port->speed = ethtool_cmd_speed(&ecmd);
|
|
port->duplex = ecmd.duplex;
|
|
goto send_event;
|
|
}
|
|
}
|
|
port->speed = 0;
|
|
port->duplex = 0;
|
|
|
|
send_event:
|
|
err = team_nl_send_event_port_list_get(port);
|
|
if (err)
|
|
netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
|
|
port->dev->name);
|
|
|
|
}
|
|
|
|
static void team_port_change_check(struct team_port *port, bool linkup)
|
|
{
|
|
struct team *team = port->team;
|
|
|
|
mutex_lock(&team->lock);
|
|
__team_port_change_check(port, linkup);
|
|
mutex_unlock(&team->lock);
|
|
}
|
|
|
|
/************************************
|
|
* Net device notifier event handler
|
|
************************************/
|
|
|
|
static int team_device_event(struct notifier_block *unused,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = (struct net_device *) ptr;
|
|
struct team_port *port;
|
|
|
|
port = team_port_get_rtnl(dev);
|
|
if (!port)
|
|
return NOTIFY_DONE;
|
|
|
|
switch (event) {
|
|
case NETDEV_UP:
|
|
if (netif_carrier_ok(dev))
|
|
team_port_change_check(port, true);
|
|
case NETDEV_DOWN:
|
|
team_port_change_check(port, false);
|
|
case NETDEV_CHANGE:
|
|
if (netif_running(port->dev))
|
|
team_port_change_check(port,
|
|
!!netif_carrier_ok(port->dev));
|
|
break;
|
|
case NETDEV_UNREGISTER:
|
|
team_del_slave(port->team->dev, dev);
|
|
break;
|
|
case NETDEV_FEAT_CHANGE:
|
|
team_compute_features(port->team);
|
|
break;
|
|
case NETDEV_CHANGEMTU:
|
|
/* Forbid to change mtu of underlaying device */
|
|
return NOTIFY_BAD;
|
|
case NETDEV_PRE_TYPE_CHANGE:
|
|
/* Forbid to change type of underlaying device */
|
|
return NOTIFY_BAD;
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block team_notifier_block __read_mostly = {
|
|
.notifier_call = team_device_event,
|
|
};
|
|
|
|
|
|
/***********************
|
|
* Module init and exit
|
|
***********************/
|
|
|
|
static int __init team_module_init(void)
|
|
{
|
|
int err;
|
|
|
|
register_netdevice_notifier(&team_notifier_block);
|
|
|
|
err = rtnl_link_register(&team_link_ops);
|
|
if (err)
|
|
goto err_rtnl_reg;
|
|
|
|
err = team_nl_init();
|
|
if (err)
|
|
goto err_nl_init;
|
|
|
|
return 0;
|
|
|
|
err_nl_init:
|
|
rtnl_link_unregister(&team_link_ops);
|
|
|
|
err_rtnl_reg:
|
|
unregister_netdevice_notifier(&team_notifier_block);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit team_module_exit(void)
|
|
{
|
|
team_nl_fini();
|
|
rtnl_link_unregister(&team_link_ops);
|
|
unregister_netdevice_notifier(&team_notifier_block);
|
|
}
|
|
|
|
module_init(team_module_init);
|
|
module_exit(team_module_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
|
|
MODULE_DESCRIPTION("Ethernet team device driver");
|
|
MODULE_ALIAS_RTNL_LINK(DRV_NAME);
|