| /* |
| * net/drivers/team/team.c - Network team device driver |
| * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/rcupdate.h> |
| #include <linux/errno.h> |
| #include <linux/ctype.h> |
| #include <linux/notifier.h> |
| #include <linux/netdevice.h> |
| #include <linux/if_arp.h> |
| #include <linux/socket.h> |
| #include <linux/etherdevice.h> |
| #include <linux/rtnetlink.h> |
| #include <net/rtnetlink.h> |
| #include <net/genetlink.h> |
| #include <net/netlink.h> |
| #include <linux/if_team.h> |
| |
| #define DRV_NAME "team" |
| |
| |
| /********** |
| * Helpers |
| **********/ |
| |
| #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT) |
| |
| static struct team_port *team_port_get_rcu(const struct net_device *dev) |
| { |
| struct team_port *port = rcu_dereference(dev->rx_handler_data); |
| |
| return team_port_exists(dev) ? port : NULL; |
| } |
| |
| static struct team_port *team_port_get_rtnl(const struct net_device *dev) |
| { |
| struct team_port *port = rtnl_dereference(dev->rx_handler_data); |
| |
| return team_port_exists(dev) ? port : NULL; |
| } |
| |
| /* |
| * Since the ability to change mac address for open port device is tested in |
| * team_port_add, this function can be called without control of return value |
| */ |
| static int __set_port_mac(struct net_device *port_dev, |
| const unsigned char *dev_addr) |
| { |
| struct sockaddr addr; |
| |
| memcpy(addr.sa_data, dev_addr, ETH_ALEN); |
| addr.sa_family = ARPHRD_ETHER; |
| return dev_set_mac_address(port_dev, &addr); |
| } |
| |
| int team_port_set_orig_mac(struct team_port *port) |
| { |
| return __set_port_mac(port->dev, port->orig.dev_addr); |
| } |
| |
| int team_port_set_team_mac(struct team_port *port) |
| { |
| return __set_port_mac(port->dev, port->team->dev->dev_addr); |
| } |
| EXPORT_SYMBOL(team_port_set_team_mac); |
| |
| |
| /******************* |
| * Options handling |
| *******************/ |
| |
| void team_options_register(struct team *team, struct team_option *option, |
| size_t option_count) |
| { |
| int i; |
| |
| for (i = 0; i < option_count; i++, option++) |
| list_add_tail(&option->list, &team->option_list); |
| } |
| EXPORT_SYMBOL(team_options_register); |
| |
| static void __team_options_change_check(struct team *team, |
| struct team_option *changed_option); |
| |
| static void __team_options_unregister(struct team *team, |
| struct team_option *option, |
| size_t option_count) |
| { |
| int i; |
| |
| for (i = 0; i < option_count; i++, option++) |
| list_del(&option->list); |
| } |
| |
| void team_options_unregister(struct team *team, struct team_option *option, |
| size_t option_count) |
| { |
| __team_options_unregister(team, option, option_count); |
| __team_options_change_check(team, NULL); |
| } |
| EXPORT_SYMBOL(team_options_unregister); |
| |
| static int team_option_get(struct team *team, struct team_option *option, |
| void *arg) |
| { |
| return option->getter(team, arg); |
| } |
| |
| static int team_option_set(struct team *team, struct team_option *option, |
| void *arg) |
| { |
| int err; |
| |
| err = option->setter(team, arg); |
| if (err) |
| return err; |
| |
| __team_options_change_check(team, option); |
| return err; |
| } |
| |
| /**************** |
| * Mode handling |
| ****************/ |
| |
| static LIST_HEAD(mode_list); |
| static DEFINE_SPINLOCK(mode_list_lock); |
| |
| static struct team_mode *__find_mode(const char *kind) |
| { |
| struct team_mode *mode; |
| |
| list_for_each_entry(mode, &mode_list, list) { |
| if (strcmp(mode->kind, kind) == 0) |
| return mode; |
| } |
| return NULL; |
| } |
| |
| static bool is_good_mode_name(const char *name) |
| { |
| while (*name != '\0') { |
| if (!isalpha(*name) && !isdigit(*name) && *name != '_') |
| return false; |
| name++; |
| } |
| return true; |
| } |
| |
| int team_mode_register(struct team_mode *mode) |
| { |
| int err = 0; |
| |
| if (!is_good_mode_name(mode->kind) || |
| mode->priv_size > TEAM_MODE_PRIV_SIZE) |
| return -EINVAL; |
| spin_lock(&mode_list_lock); |
| if (__find_mode(mode->kind)) { |
| err = -EEXIST; |
| goto unlock; |
| } |
| list_add_tail(&mode->list, &mode_list); |
| unlock: |
| spin_unlock(&mode_list_lock); |
| return err; |
| } |
| EXPORT_SYMBOL(team_mode_register); |
| |
| int team_mode_unregister(struct team_mode *mode) |
| { |
| spin_lock(&mode_list_lock); |
| list_del_init(&mode->list); |
| spin_unlock(&mode_list_lock); |
| return 0; |
| } |
| EXPORT_SYMBOL(team_mode_unregister); |
| |
| static struct team_mode *team_mode_get(const char *kind) |
| { |
| struct team_mode *mode; |
| |
| spin_lock(&mode_list_lock); |
| mode = __find_mode(kind); |
| if (!mode) { |
| spin_unlock(&mode_list_lock); |
| request_module("team-mode-%s", kind); |
| spin_lock(&mode_list_lock); |
| mode = __find_mode(kind); |
| } |
| if (mode) |
| if (!try_module_get(mode->owner)) |
| mode = NULL; |
| |
| spin_unlock(&mode_list_lock); |
| return mode; |
| } |
| |
| static void team_mode_put(const struct team_mode *mode) |
| { |
| module_put(mode->owner); |
| } |
| |
| static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) |
| { |
| dev_kfree_skb_any(skb); |
| return false; |
| } |
| |
| rx_handler_result_t team_dummy_receive(struct team *team, |
| struct team_port *port, |
| struct sk_buff *skb) |
| { |
| return RX_HANDLER_ANOTHER; |
| } |
| |
| static void team_adjust_ops(struct team *team) |
| { |
| /* |
| * To avoid checks in rx/tx skb paths, ensure here that non-null and |
| * correct ops are always set. |
| */ |
| |
| if (list_empty(&team->port_list) || |
| !team->mode || !team->mode->ops->transmit) |
| team->ops.transmit = team_dummy_transmit; |
| else |
| team->ops.transmit = team->mode->ops->transmit; |
| |
| if (list_empty(&team->port_list) || |
| !team->mode || !team->mode->ops->receive) |
| team->ops.receive = team_dummy_receive; |
| else |
| team->ops.receive = team->mode->ops->receive; |
| } |
| |
| /* |
| * We can benefit from the fact that it's ensured no port is present |
| * at the time of mode change. Therefore no packets are in fly so there's no |
| * need to set mode operations in any special way. |
| */ |
| static int __team_change_mode(struct team *team, |
| const struct team_mode *new_mode) |
| { |
| /* Check if mode was previously set and do cleanup if so */ |
| if (team->mode) { |
| void (*exit_op)(struct team *team) = team->ops.exit; |
| |
| /* Clear ops area so no callback is called any longer */ |
| memset(&team->ops, 0, sizeof(struct team_mode_ops)); |
| team_adjust_ops(team); |
| |
| if (exit_op) |
| exit_op(team); |
| team_mode_put(team->mode); |
| team->mode = NULL; |
| /* zero private data area */ |
| memset(&team->mode_priv, 0, |
| sizeof(struct team) - offsetof(struct team, mode_priv)); |
| } |
| |
| if (!new_mode) |
| return 0; |
| |
| if (new_mode->ops->init) { |
| int err; |
| |
| err = new_mode->ops->init(team); |
| if (err) |
| return err; |
| } |
| |
| team->mode = new_mode; |
| memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); |
| team_adjust_ops(team); |
| |
| return 0; |
| } |
| |
| static int team_change_mode(struct team *team, const char *kind) |
| { |
| struct team_mode *new_mode; |
| struct net_device *dev = team->dev; |
| int err; |
| |
| if (!list_empty(&team->port_list)) { |
| netdev_err(dev, "No ports can be present during mode change\n"); |
| return -EBUSY; |
| } |
| |
| if (team->mode && strcmp(team->mode->kind, kind) == 0) { |
| netdev_err(dev, "Unable to change to the same mode the team is in\n"); |
| return -EINVAL; |
| } |
| |
| new_mode = team_mode_get(kind); |
| if (!new_mode) { |
| netdev_err(dev, "Mode \"%s\" not found\n", kind); |
| return -EINVAL; |
| } |
| |
| err = __team_change_mode(team, new_mode); |
| if (err) { |
| netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); |
| team_mode_put(new_mode); |
| return err; |
| } |
| |
| netdev_info(dev, "Mode changed to \"%s\"\n", kind); |
| return 0; |
| } |
| |
| |
| /************************ |
| * Rx path frame handler |
| ************************/ |
| |
| /* note: already called with rcu_read_lock */ |
| static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) |
| { |
| struct sk_buff *skb = *pskb; |
| struct team_port *port; |
| struct team *team; |
| rx_handler_result_t res; |
| |
| skb = skb_share_check(skb, GFP_ATOMIC); |
| if (!skb) |
| return RX_HANDLER_CONSUMED; |
| |
| *pskb = skb; |
| |
| port = team_port_get_rcu(skb->dev); |
| team = port->team; |
| |
| res = team->ops.receive(team, port, skb); |
| if (res == RX_HANDLER_ANOTHER) { |
| struct team_pcpu_stats *pcpu_stats; |
| |
| pcpu_stats = this_cpu_ptr(team->pcpu_stats); |
| u64_stats_update_begin(&pcpu_stats->syncp); |
| pcpu_stats->rx_packets++; |
| pcpu_stats->rx_bytes += skb->len; |
| if (skb->pkt_type == PACKET_MULTICAST) |
| pcpu_stats->rx_multicast++; |
| u64_stats_update_end(&pcpu_stats->syncp); |
| |
| skb->dev = team->dev; |
| } else { |
| this_cpu_inc(team->pcpu_stats->rx_dropped); |
| } |
| |
| return res; |
| } |
| |
| |
| /**************** |
| * Port handling |
| ****************/ |
| |
| static bool team_port_find(const struct team *team, |
| const struct team_port *port) |
| { |
| struct team_port *cur; |
| |
| list_for_each_entry(cur, &team->port_list, list) |
| if (cur == port) |
| return true; |
| return false; |
| } |
| |
| /* |
| * Add/delete port to the team port list. Write guarded by rtnl_lock. |
| * Takes care of correct port->index setup (might be racy). |
| */ |
| static void team_port_list_add_port(struct team *team, |
| struct team_port *port) |
| { |
| port->index = team->port_count++; |
| hlist_add_head_rcu(&port->hlist, |
| team_port_index_hash(team, port->index)); |
| list_add_tail_rcu(&port->list, &team->port_list); |
| } |
| |
| static void __reconstruct_port_hlist(struct team *team, int rm_index) |
| { |
| int i; |
| struct team_port *port; |
| |
| for (i = rm_index + 1; i < team->port_count; i++) { |
| port = team_get_port_by_index(team, i); |
| hlist_del_rcu(&port->hlist); |
| port->index--; |
| hlist_add_head_rcu(&port->hlist, |
| team_port_index_hash(team, port->index)); |
| } |
| } |
| |
| static void team_port_list_del_port(struct team *team, |
| struct team_port *port) |
| { |
| int rm_index = port->index; |
| |
| hlist_del_rcu(&port->hlist); |
| list_del_rcu(&port->list); |
| __reconstruct_port_hlist(team, rm_index); |
| team->port_count--; |
| } |
| |
| #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ |
| NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ |
| NETIF_F_HIGHDMA | NETIF_F_LRO) |
| |
| static void __team_compute_features(struct team *team) |
| { |
| struct team_port *port; |
| u32 vlan_features = TEAM_VLAN_FEATURES; |
| unsigned short max_hard_header_len = ETH_HLEN; |
| |
| list_for_each_entry(port, &team->port_list, list) { |
| vlan_features = netdev_increment_features(vlan_features, |
| port->dev->vlan_features, |
| TEAM_VLAN_FEATURES); |
| |
| if (port->dev->hard_header_len > max_hard_header_len) |
| max_hard_header_len = port->dev->hard_header_len; |
| } |
| |
| team->dev->vlan_features = vlan_features; |
| team->dev->hard_header_len = max_hard_header_len; |
| |
| netdev_change_features(team->dev); |
| } |
| |
| static void team_compute_features(struct team *team) |
| { |
| spin_lock(&team->lock); |
| __team_compute_features(team); |
| spin_unlock(&team->lock); |
| } |
| |
| static int team_port_enter(struct team *team, struct team_port *port) |
| { |
| int err = 0; |
| |
| dev_hold(team->dev); |
| port->dev->priv_flags |= IFF_TEAM_PORT; |
| if (team->ops.port_enter) { |
| err = team->ops.port_enter(team, port); |
| if (err) { |
| netdev_err(team->dev, "Device %s failed to enter team mode\n", |
| port->dev->name); |
| goto err_port_enter; |
| } |
| } |
| |
| return 0; |
| |
| err_port_enter: |
| port->dev->priv_flags &= ~IFF_TEAM_PORT; |
| dev_put(team->dev); |
| |
| return err; |
| } |
| |
| static void team_port_leave(struct team *team, struct team_port *port) |
| { |
| if (team->ops.port_leave) |
| team->ops.port_leave(team, port); |
| port->dev->priv_flags &= ~IFF_TEAM_PORT; |
| dev_put(team->dev); |
| } |
| |
| static void __team_port_change_check(struct team_port *port, bool linkup); |
| |
| static int team_port_add(struct team *team, struct net_device *port_dev) |
| { |
| struct net_device *dev = team->dev; |
| struct team_port *port; |
| char *portname = port_dev->name; |
| int err; |
| |
| if (port_dev->flags & IFF_LOOPBACK || |
| port_dev->type != ARPHRD_ETHER) { |
| netdev_err(dev, "Device %s is of an unsupported type\n", |
| portname); |
| return -EINVAL; |
| } |
| |
| 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 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; |
| |
| team->dev = dev; |
| spin_lock_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); |
| team_options_register(team, team_options, ARRAY_SIZE(team_options)); |
| netif_carrier_off(dev); |
| |
| return 0; |
| } |
| |
| static void team_uninit(struct net_device *dev) |
| { |
| struct team *team = netdev_priv(dev); |
| struct team_port *port; |
| struct team_port *tmp; |
| |
| spin_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)); |
| spin_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 |
| */ |
| spin_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; |
| } |
| } |
| spin_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); |
| spin_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; |
| |
| spin_lock(&team->lock); |
| err = team_port_add(team, port_dev); |
| spin_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; |
| |
| spin_lock(&team->lock); |
| err = team_port_del(team, port_dev); |
| spin_unlock(&team->lock); |
| return err; |
| } |
| |
| 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, |
| }; |
| |
| |
| /*********************** |
| * 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); |
| spin_lock(&team->lock); |
| return team; |
| } |
| |
| static void team_nl_team_put(struct team *team) |
| { |
| spin_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; |
| |
| spin_lock(&team->lock); |
| __team_port_change_check(port, linkup); |
| spin_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); |