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Date: Sun, 23 Oct 2011 19:21:31 +0200
From: Jiri Pirko <jpirko@...hat.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net
Subject: Re: [patch net-next V3] net: introduce ethernet teaming device
Please scratch this. V4 will follow up.
Sun, Oct 23, 2011 at 10:40:53AM CEST, jpirko@...hat.com wrote:
>This patch introduces new network device called team. It supposes to be
>very fast, simple, userspace-driven alternative to existing bonding
>driver.
>
>Userspace library called libteam with couple of demo apps is available
>here:
>https://github.com/jpirko/libteam
>Note it's still in its dipers atm.
>
>team<->libteam use generic netlink for communication. That and rtnl
>suppose to be the only way to configure team device, no sysfs etc.
>
>Python binding basis for libteam was recently introduced (some need
>still need to be done on it though). Daemon providing arpmon/miimon
>active-backup functionality will be introduced shortly.
>All what's necessary is already implemented in kernel team driver.
>
>Signed-off-by: Jiri Pirko <jpirko@...hat.com>
>
>v2->v3:
> - team_change_mtu() user rcu version of list traversal to unwind
> - set and clear of mode_ops happens per pointer, not per byte
> - port hashlist changed to be embedded into team structure
> - error branch in team_port_enter() does cleanup now
> - fixed rtln->rtnl
>
>v1->v2:
> - modes are made as modules. Makes team more modular and
> extendable.
> - several commenters' nitpicks found on v1 were fixed
> - several other bugs were fixed.
> - note I ignored Eric's comment about roundrobin port selector
> as Eric's way may be easily implemented as another mode (mode
> "random") in future.
>---
> Documentation/networking/team.txt | 2 +
> MAINTAINERS | 7 +
> drivers/net/Kconfig | 2 +
> drivers/net/Makefile | 1 +
> drivers/net/team/Kconfig | 38 +
> drivers/net/team/Makefile | 7 +
> drivers/net/team/team.c | 1574 +++++++++++++++++++++++++++++
> drivers/net/team/team_mode_activebackup.c | 152 +++
> drivers/net/team/team_mode_roundrobin.c | 107 ++
> include/linux/Kbuild | 1 +
> include/linux/if.h | 1 +
> include/linux/if_team.h | 254 +++++
> include/linux/rculist.h | 14 +
> 13 files changed, 2160 insertions(+), 0 deletions(-)
> create mode 100644 Documentation/networking/team.txt
> create mode 100644 drivers/net/team/Kconfig
> create mode 100644 drivers/net/team/Makefile
> create mode 100644 drivers/net/team/team.c
> create mode 100644 drivers/net/team/team_mode_activebackup.c
> create mode 100644 drivers/net/team/team_mode_roundrobin.c
> create mode 100644 include/linux/if_team.h
>
>diff --git a/Documentation/networking/team.txt b/Documentation/networking/team.txt
>new file mode 100644
>index 0000000..5a01368
>--- /dev/null
>+++ b/Documentation/networking/team.txt
>@@ -0,0 +1,2 @@
>+Team devices are driven from userspace via libteam library which is here:
>+ https://github.com/jpirko/libteam
>diff --git a/MAINTAINERS b/MAINTAINERS
>index 5008b08..c33400d 100644
>--- a/MAINTAINERS
>+++ b/MAINTAINERS
>@@ -6372,6 +6372,13 @@ W: http://tcp-lp-mod.sourceforge.net/
> S: Maintained
> F: net/ipv4/tcp_lp.c
>
>+TEAM DRIVER
>+M: Jiri Pirko <jpirko@...hat.com>
>+L: netdev@...r.kernel.org
>+S: Supported
>+F: drivers/net/team/
>+F: include/linux/if_team.h
>+
> TEGRA SUPPORT
> M: Colin Cross <ccross@...roid.com>
> M: Erik Gilling <konkers@...roid.com>
>diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
>index 583f66c..b3020be 100644
>--- a/drivers/net/Kconfig
>+++ b/drivers/net/Kconfig
>@@ -125,6 +125,8 @@ config IFB
> 'ifb1' etc.
> Look at the iproute2 documentation directory for usage etc
>
>+source "drivers/net/team/Kconfig"
>+
> config MACVLAN
> tristate "MAC-VLAN support (EXPERIMENTAL)"
> depends on EXPERIMENTAL
>diff --git a/drivers/net/Makefile b/drivers/net/Makefile
>index fa877cd..4e4ebfe 100644
>--- a/drivers/net/Makefile
>+++ b/drivers/net/Makefile
>@@ -17,6 +17,7 @@ obj-$(CONFIG_NET) += Space.o loopback.o
> obj-$(CONFIG_NETCONSOLE) += netconsole.o
> obj-$(CONFIG_PHYLIB) += phy/
> obj-$(CONFIG_RIONET) += rionet.o
>+obj-$(CONFIG_NET_TEAM) += team/
> obj-$(CONFIG_TUN) += tun.o
> obj-$(CONFIG_VETH) += veth.o
> obj-$(CONFIG_VIRTIO_NET) += virtio_net.o
>diff --git a/drivers/net/team/Kconfig b/drivers/net/team/Kconfig
>new file mode 100644
>index 0000000..70a43a6
>--- /dev/null
>+++ b/drivers/net/team/Kconfig
>@@ -0,0 +1,38 @@
>+menuconfig NET_TEAM
>+ tristate "Ethernet team driver support (EXPERIMENTAL)"
>+ depends on EXPERIMENTAL
>+ ---help---
>+ This allows one to create virtual interfaces that teams together
>+ multiple ethernet devices.
>+
>+ Team devices can be added using the "ip" command from the
>+ iproute2 package:
>+
>+ "ip link add link [ address MAC ] [ NAME ] type team"
>+
>+ To compile this driver as a module, choose M here: the module
>+ will be called team.
>+
>+if NET_TEAM
>+
>+config NET_TEAM_MODE_ROUNDROBIN
>+ tristate "Round-robin mode support"
>+ depends on NET_TEAM
>+ ---help---
>+ Basic mode where port used for transmitting packets is selected in
>+ round-robin fashion using packet counter.
>+
>+ To compile this team mode as a module, choose M here: the module
>+ will be called team_mode_roundrobin.
>+
>+config NET_TEAM_MODE_ACTIVEBACKUP
>+ tristate "Active-backup mode support"
>+ depends on NET_TEAM
>+ ---help---
>+ Only one port is active at a time and the rest of ports are used
>+ for backup.
>+
>+ To compile this team mode as a module, choose M here: the module
>+ will be called team_mode_activebackup.
>+
>+endif # NET_TEAM
>diff --git a/drivers/net/team/Makefile b/drivers/net/team/Makefile
>new file mode 100644
>index 0000000..85f2028
>--- /dev/null
>+++ b/drivers/net/team/Makefile
>@@ -0,0 +1,7 @@
>+#
>+# Makefile for the network team driver
>+#
>+
>+obj-$(CONFIG_NET_TEAM) += team.o
>+obj-$(CONFIG_NET_TEAM_MODE_ROUNDROBIN) += team_mode_roundrobin.o
>+obj-$(CONFIG_NET_TEAM_MODE_ACTIVEBACKUP) += team_mode_activebackup.o
>diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
>new file mode 100644
>index 0000000..8004916
>--- /dev/null
>+++ b/drivers/net/team/team.c
>@@ -0,0 +1,1574 @@
>+/*
>+ * net/drivers/team/team.c - Network team device driver
>+ * Copyright (c) 2011 Jiri Pirko <jpirko@...hat.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);
>+}
>+EXPORT_SYMBOL(team_port_set_orig_mac);
>+
>+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 char *kind)
>+{
>+ struct team_mode *mode;
>+
>+ spin_lock(&mode_list_lock);
>+ mode = __find_mode(kind);
>+ BUG_ON(!mode);
>+ module_put(mode->owner);
>+ spin_unlock(&mode_list_lock);
>+}
>+
>+/*
>+ * We can benefit from the fact that it's ensured no port is present
>+ * at the time of mode change.
>+ */
>+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_kind) {
>+ void (*exit_op)(struct team *team) = team->mode_ops.exit;
>+
>+ /* Clear ops area so no callback is called any longer */
>+ team_mode_ops_clear(&team->mode_ops);
>+
>+ synchronize_rcu();
>+
>+ if (exit_op)
>+ exit_op(team);
>+ team_mode_put(team->mode_kind);
>+ team->mode_kind = 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_kind = new_mode->kind;
>+ team_mode_ops_copy(&team->mode_ops, new_mode->ops);
>+
>+ 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_kind && 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(kind);
>+ 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 = RX_HANDLER_ANOTHER;
>+
>+ 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;
>+
>+ if (team->mode_ops.receive)
>+ res = team->mode_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_rcu(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->mode_ops.port_enter) {
>+ err = team->mode_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->mode_ops.port_leave)
>+ team->mode_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;
>+ char tmp_addr[ETH_ALEN];
>+ 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);
>+ random_ether_addr(tmp_addr);
>+ err = __set_port_mac(port_dev, tmp_addr);
>+ if (err) {
>+ netdev_dbg(dev, "Device %s mac addr set failed\n",
>+ portname);
>+ goto err_set_mac_rand;
>+ }
>+
>+ err = dev_open(port_dev);
>+ if (err) {
>+ netdev_dbg(dev, "Device %s opening failed\n",
>+ portname);
>+ goto err_dev_open;
>+ }
>+
>+ err = team_port_set_orig_mac(port);
>+ if (err) {
>+ netdev_dbg(dev, "Device %s mac addr set failed - Device does not support addr change when it's opened\n",
>+ portname);
>+ goto err_set_mac_opened;
>+ }
>+
>+ 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 = 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_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:
>+ team_port_leave(team, port);
>+
>+err_port_enter:
>+err_set_mac_opened:
>+ dev_close(port_dev);
>+
>+err_dev_open:
>+ team_port_set_orig_mac(port);
>+
>+err_set_mac_rand:
>+ 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);
>+ netdev_rx_handler_unregister(port_dev);
>+ netdev_set_master(port_dev, NULL);
>+ team_port_leave(team, port);
>+ dev_close(port_dev);
>+ 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_kind ? 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);
>+
>+ 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;
>+
>+ /*
>+ * Ensure transmit function is called only in case there is at least
>+ * one port present.
>+ */
>+ if (likely(!list_empty(&team->port_list) && team->mode_ops.transmit))
>+ tx_success = team->mode_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->mode_ops.port_change_mac)
>+ team->mode_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;
>+
>+ rcu_read_lock();
>+ list_for_each_entry_rcu(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;
>+ }
>+ }
>+ rcu_read_unlock();
>+
>+ dev->mtu = new_mtu;
>+
>+ return 0;
>+
>+unwind:
>+ list_for_each_entry_continue_reverse_rcu(port, &team->port_list, list)
>+ dev_set_mtu(port->dev, dev->mtu);
>+
>+ rcu_read_unlock();
>+ 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;
>+
>+ 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;
>+
>+ 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.
>+ * To ensure team_uninit would not be called in between, hold rcu_read_lock
>+ * all the time.
>+ */
>+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]);
>+ rcu_read_lock();
>+ dev = dev_get_by_index_rcu(net, ifindex);
>+ if (!dev || dev->netdev_ops != &team_netdev_ops) {
>+ rcu_read_unlock();
>+ 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);
>+ rcu_read_unlock();
>+}
>+
>+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_rcu(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_CHANGEADDR:
>+ /* Forbid to change addr 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@...hat.com>");
>+MODULE_DESCRIPTION("Ethernet team device driver");
>+MODULE_ALIAS_RTNL_LINK(DRV_NAME);
>diff --git a/drivers/net/team/team_mode_activebackup.c b/drivers/net/team/team_mode_activebackup.c
>new file mode 100644
>index 0000000..1aa2bfb
>--- /dev/null
>+++ b/drivers/net/team/team_mode_activebackup.c
>@@ -0,0 +1,152 @@
>+/*
>+ * net/drivers/team/team_mode_activebackup.c - Active-backup mode for team
>+ * Copyright (c) 2011 Jiri Pirko <jpirko@...hat.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/errno.h>
>+#include <linux/netdevice.h>
>+#include <net/rtnetlink.h>
>+#include <linux/if_team.h>
>+
>+struct ab_priv {
>+ struct team_port __rcu *active_port;
>+};
>+
>+static struct ab_priv *ab_priv(struct team *team)
>+{
>+ return (struct ab_priv *) &team->mode_priv;
>+}
>+
>+static rx_handler_result_t ab_receive(struct team *team, struct team_port *port,
>+ struct sk_buff *skb) {
>+ struct team_port *active_port;
>+
>+ active_port = rcu_dereference(ab_priv(team)->active_port);
>+ if (active_port != port)
>+ return RX_HANDLER_EXACT;
>+ return RX_HANDLER_ANOTHER;
>+}
>+
>+static bool ab_transmit(struct team *team, struct sk_buff *skb)
>+{
>+ struct team_port *active_port;
>+
>+ active_port = rcu_dereference(ab_priv(team)->active_port);
>+ if (unlikely(!active_port))
>+ goto drop;
>+ skb->dev = active_port->dev;
>+ if (dev_queue_xmit(skb))
>+ return false;
>+ return true;
>+
>+drop:
>+ dev_kfree_skb(skb);
>+ return false;
>+}
>+
>+static void ab_port_leave(struct team *team, struct team_port *port)
>+{
>+ if (ab_priv(team)->active_port == port)
>+ rcu_assign_pointer(ab_priv(team)->active_port, NULL);
>+}
>+
>+static void ab_port_change_mac(struct team *team, struct team_port *port)
>+{
>+ if (ab_priv(team)->active_port == port)
>+ team_port_set_team_mac(port);
>+}
>+
>+static int ab_active_port_get(struct team *team, void *arg)
>+{
>+ u32 *ifindex = arg;
>+
>+ *ifindex = 0;
>+ if (ab_priv(team)->active_port)
>+ *ifindex = ab_priv(team)->active_port->dev->ifindex;
>+ return 0;
>+}
>+
>+static int ab_active_port_set(struct team *team, void *arg)
>+{
>+ u32 *ifindex = arg;
>+ struct team_port *port;
>+
>+ list_for_each_entry_rcu(port, &team->port_list, list) {
>+ if (port->dev->ifindex == *ifindex) {
>+ struct team_port *ac_port = ab_priv(team)->active_port;
>+
>+ /* rtnl_lock needs to be held when setting macs */
>+ rtnl_lock();
>+ if (ac_port)
>+ team_port_set_orig_mac(ac_port);
>+ rcu_assign_pointer(ab_priv(team)->active_port, port);
>+ team_port_set_team_mac(port);
>+ rtnl_unlock();
>+ return 0;
>+ }
>+ }
>+ return -ENOENT;
>+}
>+
>+static struct team_option ab_options[] = {
>+ {
>+ .name = "activeport",
>+ .type = TEAM_OPTION_TYPE_U32,
>+ .getter = ab_active_port_get,
>+ .setter = ab_active_port_set,
>+ },
>+};
>+
>+int ab_init(struct team *team)
>+{
>+ team_options_register(team, ab_options, ARRAY_SIZE(ab_options));
>+ return 0;
>+}
>+
>+void ab_exit(struct team *team)
>+{
>+ team_options_unregister(team, ab_options, ARRAY_SIZE(ab_options));
>+}
>+
>+static const struct team_mode_ops ab_mode_ops = {
>+ .init = ab_init,
>+ .exit = ab_exit,
>+ .receive = ab_receive,
>+ .transmit = ab_transmit,
>+ .port_leave = ab_port_leave,
>+ .port_change_mac = ab_port_change_mac,
>+};
>+
>+static struct team_mode ab_mode = {
>+ .kind = "activebackup",
>+ .owner = THIS_MODULE,
>+ .priv_size = sizeof(struct ab_priv),
>+ .ops = &ab_mode_ops,
>+};
>+
>+static int __init ab_init_module(void)
>+{
>+ return team_mode_register(&ab_mode);
>+}
>+
>+static void __exit ab_cleanup_module(void)
>+{
>+ team_mode_unregister(&ab_mode);
>+}
>+
>+module_init(ab_init_module);
>+module_exit(ab_cleanup_module);
>+
>+MODULE_LICENSE("GPL v2");
>+MODULE_AUTHOR("Jiri Pirko <jpirko@...hat.com>");
>+MODULE_DESCRIPTION("Active-backup mode for team");
>+MODULE_ALIAS("team-mode-activebackup");
>diff --git a/drivers/net/team/team_mode_roundrobin.c b/drivers/net/team/team_mode_roundrobin.c
>new file mode 100644
>index 0000000..0374052
>--- /dev/null
>+++ b/drivers/net/team/team_mode_roundrobin.c
>@@ -0,0 +1,107 @@
>+/*
>+ * net/drivers/team/team_mode_roundrobin.c - Round-robin mode for team
>+ * Copyright (c) 2011 Jiri Pirko <jpirko@...hat.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/errno.h>
>+#include <linux/netdevice.h>
>+#include <linux/if_team.h>
>+
>+struct rr_priv {
>+ unsigned int sent_packets;
>+};
>+
>+static struct rr_priv *rr_priv(struct team *team)
>+{
>+ return (struct rr_priv *) &team->mode_priv;
>+}
>+
>+static struct team_port *__get_first_port_up(struct team *team,
>+ struct team_port *port)
>+{
>+ struct team_port *cur;
>+
>+ if (port->linkup)
>+ return port;
>+ cur = port;
>+ list_for_each_entry_continue_rcu(cur, &team->port_list, list)
>+ if (cur->linkup)
>+ return cur;
>+ list_for_each_entry_rcu(cur, &team->port_list, list) {
>+ if (cur == port)
>+ break;
>+ if (cur->linkup)
>+ return cur;
>+ }
>+ return NULL;
>+}
>+
>+static bool rr_transmit(struct team *team, struct sk_buff *skb)
>+{
>+ struct team_port *port;
>+ int port_index;
>+
>+ port_index = rr_priv(team)->sent_packets++ % team->port_count;
>+ port = team_get_port_by_index_rcu(team, port_index);
>+ port = __get_first_port_up(team, port);
>+ if (unlikely(!port))
>+ goto drop;
>+ skb->dev = port->dev;
>+ if (dev_queue_xmit(skb))
>+ return false;
>+ return true;
>+
>+drop:
>+ dev_kfree_skb(skb);
>+ return false;
>+}
>+
>+static int rr_port_enter(struct team *team, struct team_port *port)
>+{
>+ return team_port_set_team_mac(port);
>+}
>+
>+static void rr_port_change_mac(struct team *team, struct team_port *port)
>+{
>+ team_port_set_team_mac(port);
>+}
>+
>+static const struct team_mode_ops rr_mode_ops = {
>+ .transmit = rr_transmit,
>+ .port_enter = rr_port_enter,
>+ .port_change_mac = rr_port_change_mac,
>+};
>+
>+static struct team_mode rr_mode = {
>+ .kind = "roundrobin",
>+ .owner = THIS_MODULE,
>+ .priv_size = sizeof(struct rr_priv),
>+ .ops = &rr_mode_ops,
>+};
>+
>+static int __init rr_init_module(void)
>+{
>+ return team_mode_register(&rr_mode);
>+}
>+
>+static void __exit rr_cleanup_module(void)
>+{
>+ team_mode_unregister(&rr_mode);
>+}
>+
>+module_init(rr_init_module);
>+module_exit(rr_cleanup_module);
>+
>+MODULE_LICENSE("GPL v2");
>+MODULE_AUTHOR("Jiri Pirko <jpirko@...hat.com>");
>+MODULE_DESCRIPTION("Round-robin mode for team");
>+MODULE_ALIAS("team-mode-roundrobin");
>diff --git a/include/linux/Kbuild b/include/linux/Kbuild
>index 619b565..0b091b3 100644
>--- a/include/linux/Kbuild
>+++ b/include/linux/Kbuild
>@@ -185,6 +185,7 @@ header-y += if_pppol2tp.h
> header-y += if_pppox.h
> header-y += if_slip.h
> header-y += if_strip.h
>+header-y += if_team.h
> header-y += if_tr.h
> header-y += if_tun.h
> header-y += if_tunnel.h
>diff --git a/include/linux/if.h b/include/linux/if.h
>index db20bd4..06b6ef6 100644
>--- a/include/linux/if.h
>+++ b/include/linux/if.h
>@@ -79,6 +79,7 @@
> #define IFF_TX_SKB_SHARING 0x10000 /* The interface supports sharing
> * skbs on transmit */
> #define IFF_UNICAST_FLT 0x20000 /* Supports unicast filtering */
>+#define IFF_TEAM_PORT 0x40000 /* device used as team port */
>
> #define IF_GET_IFACE 0x0001 /* for querying only */
> #define IF_GET_PROTO 0x0002
>diff --git a/include/linux/if_team.h b/include/linux/if_team.h
>new file mode 100644
>index 0000000..de395fc
>--- /dev/null
>+++ b/include/linux/if_team.h
>@@ -0,0 +1,254 @@
>+/*
>+ * include/linux/if_team.h - Network team device driver header
>+ * Copyright (c) 2011 Jiri Pirko <jpirko@...hat.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.
>+ */
>+
>+#ifndef _LINUX_IF_TEAM_H_
>+#define _LINUX_IF_TEAM_H_
>+
>+#ifdef __KERNEL__
>+
>+struct team_pcpu_stats {
>+ u64 rx_packets;
>+ u64 rx_bytes;
>+ u64 rx_multicast;
>+ u64 tx_packets;
>+ u64 tx_bytes;
>+ struct u64_stats_sync syncp;
>+ u32 rx_dropped;
>+ u32 tx_dropped;
>+};
>+
>+struct team;
>+
>+struct team_port {
>+ struct net_device *dev;
>+ struct hlist_node hlist; /* node in hash list */
>+ struct list_head list; /* node in ordinary list */
>+ struct team *team;
>+ int index;
>+
>+ /*
>+ * A place for storing original values of the device before it
>+ * become a port.
>+ */
>+ struct {
>+ unsigned char dev_addr[MAX_ADDR_LEN];
>+ unsigned int mtu;
>+ } orig;
>+
>+ bool linkup;
>+ u32 speed;
>+ u8 duplex;
>+
>+ struct rcu_head rcu;
>+};
>+
>+struct team_mode_ops {
>+ int (*init)(struct team *team);
>+ void (*exit)(struct team *team);
>+ rx_handler_result_t (*receive)(struct team *team,
>+ struct team_port *port,
>+ struct sk_buff *skb);
>+ bool (*transmit)(struct team *team, struct sk_buff *skb);
>+ int (*port_enter)(struct team *team, struct team_port *port);
>+ void (*port_leave)(struct team *team, struct team_port *port);
>+ void (*port_change_mac)(struct team *team, struct team_port *port);
>+};
>+
>+static inline void team_mode_ops_copy(struct team_mode_ops *dst,
>+ const struct team_mode_ops *src)
>+{
>+ dst->init = src->init;
>+ dst->exit = src->exit;
>+ dst->receive = src->receive;
>+ dst->transmit = src->transmit;
>+ dst->port_enter = src->port_enter;
>+ dst->port_leave = src->port_leave;
>+ dst->port_change_mac = src->port_change_mac;
>+}
>+
>+static inline void team_mode_ops_clear(struct team_mode_ops *dst)
>+{
>+ dst->init = NULL;
>+ dst->exit = NULL;
>+ dst->receive = NULL;
>+ dst->transmit = NULL;
>+ dst->port_enter = NULL;
>+ dst->port_leave = NULL;
>+ dst->port_change_mac = NULL;
>+}
>+
>+enum team_option_type {
>+ TEAM_OPTION_TYPE_U32,
>+ TEAM_OPTION_TYPE_STRING,
>+};
>+
>+struct team_option {
>+ struct list_head list;
>+ const char *name;
>+ enum team_option_type type;
>+ int (*getter)(struct team *team, void *arg);
>+ int (*setter)(struct team *team, void *arg);
>+};
>+
>+struct team_mode {
>+ struct list_head list;
>+ const char *kind;
>+ struct module *owner;
>+ size_t priv_size;
>+ const struct team_mode_ops *ops;
>+};
>+
>+#define TEAM_PORT_HASHBITS 4
>+#define TEAM_PORT_HASHENTRIES (1 << TEAM_PORT_HASHBITS)
>+
>+#define TEAM_MODE_PRIV_LONGS 4
>+#define TEAM_MODE_PRIV_SIZE (sizeof(long) * TEAM_MODE_PRIV_LONGS)
>+
>+struct team {
>+ struct net_device *dev; /* associated netdevice */
>+ struct team_pcpu_stats __percpu *pcpu_stats;
>+
>+ spinlock_t lock; /* used for overall locking, e.g. port lists write */
>+
>+ /*
>+ * port lists with port count
>+ */
>+ int port_count;
>+ struct hlist_head port_hlist[TEAM_PORT_HASHENTRIES];
>+ struct list_head port_list;
>+
>+ struct list_head option_list;
>+
>+ const char *mode_kind;
>+ struct team_mode_ops mode_ops;
>+ long mode_priv[TEAM_MODE_PRIV_LONGS];
>+};
>+
>+static inline struct hlist_head *team_port_index_hash(struct team *team,
>+ int port_index)
>+{
>+ return &team->port_hlist[port_index & (TEAM_PORT_HASHENTRIES - 1)];
>+}
>+
>+static inline struct team_port *team_get_port_by_index_rcu(struct team *team,
>+ int port_index)
>+{
>+ struct hlist_node *p;
>+ struct team_port *port;
>+ struct hlist_head *head = team_port_index_hash(team, port_index);
>+
>+ hlist_for_each_entry_rcu(port, p, head, hlist)
>+ if (port->index == port_index)
>+ return port;
>+ return NULL;
>+}
>+
>+extern int team_port_set_orig_mac(struct team_port *port);
>+extern int team_port_set_team_mac(struct team_port *port);
>+extern void team_options_register(struct team *team,
>+ struct team_option *option,
>+ size_t option_count);
>+extern void team_options_unregister(struct team *team,
>+ struct team_option *option,
>+ size_t option_count);
>+extern int team_mode_register(struct team_mode *mode);
>+extern int team_mode_unregister(struct team_mode *mode);
>+
>+#endif /* __KERNEL__ */
>+
>+#define TEAM_STRING_MAX_LEN 32
>+
>+/**********************************
>+ * NETLINK_GENERIC netlink family.
>+ **********************************/
>+
>+enum {
>+ TEAM_CMD_NOOP,
>+ TEAM_CMD_OPTIONS_SET,
>+ TEAM_CMD_OPTIONS_GET,
>+ TEAM_CMD_PORT_LIST_GET,
>+
>+ __TEAM_CMD_MAX,
>+ TEAM_CMD_MAX = (__TEAM_CMD_MAX - 1),
>+};
>+
>+enum {
>+ TEAM_ATTR_UNSPEC,
>+ TEAM_ATTR_TEAM_IFINDEX, /* u32 */
>+ TEAM_ATTR_LIST_OPTION, /* nest */
>+ TEAM_ATTR_LIST_PORT, /* nest */
>+
>+ __TEAM_ATTR_MAX,
>+ TEAM_ATTR_MAX = __TEAM_ATTR_MAX - 1,
>+};
>+
>+/* Nested layout of get/set msg:
>+ *
>+ * [TEAM_ATTR_LIST_OPTION]
>+ * [TEAM_ATTR_ITEM_OPTION]
>+ * [TEAM_ATTR_OPTION_*], ...
>+ * [TEAM_ATTR_ITEM_OPTION]
>+ * [TEAM_ATTR_OPTION_*], ...
>+ * ...
>+ * [TEAM_ATTR_LIST_PORT]
>+ * [TEAM_ATTR_ITEM_PORT]
>+ * [TEAM_ATTR_PORT_*], ...
>+ * [TEAM_ATTR_ITEM_PORT]
>+ * [TEAM_ATTR_PORT_*], ...
>+ * ...
>+ */
>+
>+enum {
>+ TEAM_ATTR_ITEM_OPTION_UNSPEC,
>+ TEAM_ATTR_ITEM_OPTION, /* nest */
>+
>+ __TEAM_ATTR_ITEM_OPTION_MAX,
>+ TEAM_ATTR_ITEM_OPTION_MAX = __TEAM_ATTR_ITEM_OPTION_MAX - 1,
>+};
>+
>+enum {
>+ TEAM_ATTR_OPTION_UNSPEC,
>+ TEAM_ATTR_OPTION_NAME, /* string */
>+ TEAM_ATTR_OPTION_CHANGED, /* flag */
>+ TEAM_ATTR_OPTION_TYPE, /* u8 */
>+ TEAM_ATTR_OPTION_DATA, /* dynamic */
>+
>+ __TEAM_ATTR_OPTION_MAX,
>+ TEAM_ATTR_OPTION_MAX = __TEAM_ATTR_OPTION_MAX - 1,
>+};
>+
>+enum {
>+ TEAM_ATTR_ITEM_PORT_UNSPEC,
>+ TEAM_ATTR_ITEM_PORT, /* nest */
>+
>+ __TEAM_ATTR_ITEM_PORT_MAX,
>+ TEAM_ATTR_ITEM_PORT_MAX = __TEAM_ATTR_ITEM_PORT_MAX - 1,
>+};
>+
>+enum {
>+ TEAM_ATTR_PORT_UNSPEC,
>+ TEAM_ATTR_PORT_IFINDEX, /* u32 */
>+ TEAM_ATTR_PORT_CHANGED, /* flag */
>+ TEAM_ATTR_PORT_LINKUP, /* flag */
>+ TEAM_ATTR_PORT_SPEED, /* u32 */
>+ TEAM_ATTR_PORT_DUPLEX, /* u8 */
>+
>+ __TEAM_ATTR_PORT_MAX,
>+ TEAM_ATTR_PORT_MAX = __TEAM_ATTR_PORT_MAX - 1,
>+};
>+
>+/*
>+ * NETLINK_GENERIC related info
>+ */
>+#define TEAM_GENL_NAME "team"
>+#define TEAM_GENL_VERSION 0x1
>+#define TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME "change_event"
>+
>+#endif /* _LINUX_IF_TEAM_H_ */
>diff --git a/include/linux/rculist.h b/include/linux/rculist.h
>index d079290..7586b2c 100644
>--- a/include/linux/rculist.h
>+++ b/include/linux/rculist.h
>@@ -288,6 +288,20 @@ static inline void list_splice_init_rcu(struct list_head *list,
> pos = list_entry_rcu(pos->member.next, typeof(*pos), member))
>
> /**
>+ * list_for_each_entry_continue_reverse_rcu - iterate backwards from the given point
>+ * @pos: the type * to use as a loop cursor.
>+ * @head: the head for your list.
>+ * @member: the name of the list_struct within the struct.
>+ *
>+ * Start to iterate over list of given type backwards, continuing after
>+ * the current position.
>+ */
>+#define list_for_each_entry_continue_reverse_rcu(pos, head, member) \
>+ for (pos = list_entry_rcu(pos->member.prev, typeof(*pos), member); \
>+ &pos->member != (head); \
>+ pos = list_entry_rcu(pos->member.prev, typeof(*pos), member))
>+
>+/**
> * hlist_del_rcu - deletes entry from hash list without re-initialization
> * @n: the element to delete from the hash list.
> *
>--
>1.7.6
>
--
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