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OpenCloudOS-Kernel/drivers/net/team/team.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* drivers/net/team/team.c - Network team device driver
* Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
*/
#include <linux/ethtool.h>
#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/netpoll.h>
#include <linux/if_vlan.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 <net/sch_generic.h>
#include <generated/utsrelease.h>
#include <linux/if_team.h>
#define DRV_NAME "team"
/**********
* Helpers
**********/
static struct team_port *team_port_get_rtnl(const struct net_device *dev)
{
struct team_port *port = rtnl_dereference(dev->rx_handler_data);
return netif_is_team_port(dev) ? port : NULL;
}
/*
* Since the ability to change device 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_dev_addr(struct net_device *port_dev,
const unsigned char *dev_addr)
{
struct sockaddr_storage addr;
memcpy(addr.__data, dev_addr, port_dev->addr_len);
addr.ss_family = port_dev->type;
return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
}
static int team_port_set_orig_dev_addr(struct team_port *port)
{
return __set_port_dev_addr(port->dev, port->orig.dev_addr);
}
static int team_port_set_team_dev_addr(struct team *team,
struct team_port *port)
{
return __set_port_dev_addr(port->dev, team->dev->dev_addr);
}
int team_modeop_port_enter(struct team *team, struct team_port *port)
{
return team_port_set_team_dev_addr(team, port);
}
EXPORT_SYMBOL(team_modeop_port_enter);
void team_modeop_port_change_dev_addr(struct team *team,
struct team_port *port)
{
team_port_set_team_dev_addr(team, port);
}
EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
static void team_lower_state_changed(struct team_port *port)
{
struct netdev_lag_lower_state_info info;
info.link_up = port->linkup;
info.tx_enabled = team_port_enabled(port);
netdev_lower_state_changed(port->dev, &info);
}
static void team_refresh_port_linkup(struct team_port *port)
{
bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
port->state.linkup;
if (port->linkup != new_linkup) {
port->linkup = new_linkup;
team_lower_state_changed(port);
}
}
/*******************
* Options handling
*******************/
struct team_option_inst { /* One for each option instance */
struct list_head list;
struct list_head tmp_list;
struct team_option *option;
struct team_option_inst_info info;
bool changed;
bool removed;
};
static struct team_option *__team_find_option(struct team *team,
const char *opt_name)
{
struct team_option *option;
list_for_each_entry(option, &team->option_list, list) {
if (strcmp(option->name, opt_name) == 0)
return option;
}
return NULL;
}
static void __team_option_inst_del(struct team_option_inst *opt_inst)
{
list_del(&opt_inst->list);
kfree(opt_inst);
}
static void __team_option_inst_del_option(struct team *team,
struct team_option *option)
{
struct team_option_inst *opt_inst, *tmp;
list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
if (opt_inst->option == option)
__team_option_inst_del(opt_inst);
}
}
static int __team_option_inst_add(struct team *team, struct team_option *option,
struct team_port *port)
{
struct team_option_inst *opt_inst;
unsigned int array_size;
unsigned int i;
int err;
array_size = option->array_size;
if (!array_size)
array_size = 1; /* No array but still need one instance */
for (i = 0; i < array_size; i++) {
opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
if (!opt_inst)
return -ENOMEM;
opt_inst->option = option;
opt_inst->info.port = port;
opt_inst->info.array_index = i;
opt_inst->changed = true;
opt_inst->removed = false;
list_add_tail(&opt_inst->list, &team->option_inst_list);
if (option->init) {
err = option->init(team, &opt_inst->info);
if (err)
return err;
}
}
return 0;
}
static int __team_option_inst_add_option(struct team *team,
struct team_option *option)
{
int err;
if (!option->per_port) {
err = __team_option_inst_add(team, option, NULL);
if (err)
goto inst_del_option;
}
return 0;
inst_del_option:
__team_option_inst_del_option(team, option);
return err;
}
static void __team_option_inst_mark_removed_option(struct team *team,
struct team_option *option)
{
struct team_option_inst *opt_inst;
list_for_each_entry(opt_inst, &team->option_inst_list, list) {
if (opt_inst->option == option) {
opt_inst->changed = true;
opt_inst->removed = true;
}
}
}
static void __team_option_inst_del_port(struct team *team,
struct team_port *port)
{
struct team_option_inst *opt_inst, *tmp;
list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
if (opt_inst->option->per_port &&
opt_inst->info.port == port)
__team_option_inst_del(opt_inst);
}
}
static int __team_option_inst_add_port(struct team *team,
struct team_port *port)
{
struct team_option *option;
int err;
list_for_each_entry(option, &team->option_list, list) {
if (!option->per_port)
continue;
err = __team_option_inst_add(team, option, port);
if (err)
goto inst_del_port;
}
return 0;
inst_del_port:
__team_option_inst_del_port(team, port);
return err;
}
static void __team_option_inst_mark_removed_port(struct team *team,
struct team_port *port)
{
struct team_option_inst *opt_inst;
list_for_each_entry(opt_inst, &team->option_inst_list, list) {
if (opt_inst->info.port == port) {
opt_inst->changed = true;
opt_inst->removed = true;
}
}
}
static int __team_options_register(struct team *team,
const struct team_option *option,
size_t option_count)
{
int i;
struct team_option **dst_opts;
int err;
dst_opts = kcalloc(option_count, sizeof(struct team_option *),
GFP_KERNEL);
if (!dst_opts)
return -ENOMEM;
for (i = 0; i < option_count; i++, option++) {
if (__team_find_option(team, option->name)) {
err = -EEXIST;
goto alloc_rollback;
}
dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
if (!dst_opts[i]) {
err = -ENOMEM;
goto alloc_rollback;
}
}
for (i = 0; i < option_count; i++) {
err = __team_option_inst_add_option(team, dst_opts[i]);
if (err)
goto inst_rollback;
list_add_tail(&dst_opts[i]->list, &team->option_list);
}
kfree(dst_opts);
return 0;
inst_rollback:
for (i--; i >= 0; i--)
__team_option_inst_del_option(team, dst_opts[i]);
i = option_count;
alloc_rollback:
for (i--; i >= 0; i--)
kfree(dst_opts[i]);
kfree(dst_opts);
return err;
}
static void __team_options_mark_removed(struct team *team,
const struct team_option *option,
size_t option_count)
{
int i;
for (i = 0; i < option_count; i++, option++) {
struct team_option *del_opt;
del_opt = __team_find_option(team, option->name);
if (del_opt)
__team_option_inst_mark_removed_option(team, del_opt);
}
}
static void __team_options_unregister(struct team *team,
const struct team_option *option,
size_t option_count)
{
int i;
for (i = 0; i < option_count; i++, option++) {
struct team_option *del_opt;
del_opt = __team_find_option(team, option->name);
if (del_opt) {
__team_option_inst_del_option(team, del_opt);
list_del(&del_opt->list);
kfree(del_opt);
}
}
}
static void __team_options_change_check(struct team *team);
int team_options_register(struct team *team,
const struct team_option *option,
size_t option_count)
{
int err;
err = __team_options_register(team, option, option_count);
if (err)
return err;
__team_options_change_check(team);
return 0;
}
EXPORT_SYMBOL(team_options_register);
void team_options_unregister(struct team *team,
const struct team_option *option,
size_t option_count)
{
__team_options_mark_removed(team, option, option_count);
__team_options_change_check(team);
__team_options_unregister(team, option, option_count);
}
EXPORT_SYMBOL(team_options_unregister);
static int team_option_get(struct team *team,
struct team_option_inst *opt_inst,
struct team_gsetter_ctx *ctx)
{
if (!opt_inst->option->getter)
return -EOPNOTSUPP;
return opt_inst->option->getter(team, ctx);
}
static int team_option_set(struct team *team,
struct team_option_inst *opt_inst,
struct team_gsetter_ctx *ctx)
{
if (!opt_inst->option->setter)
return -EOPNOTSUPP;
return opt_inst->option->setter(team, ctx);
}
void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
{
struct team_option_inst *opt_inst;
opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
opt_inst->changed = true;
}
EXPORT_SYMBOL(team_option_inst_set_change);
void team_options_change_check(struct team *team)
{
__team_options_change_check(team);
}
EXPORT_SYMBOL(team_options_change_check);
/****************
* Mode handling
****************/
static LIST_HEAD(mode_list);
static DEFINE_SPINLOCK(mode_list_lock);
struct team_mode_item {
struct list_head list;
const struct team_mode *mode;
};
static struct team_mode_item *__find_mode(const char *kind)
{
struct team_mode_item *mitem;
list_for_each_entry(mitem, &mode_list, list) {
if (strcmp(mitem->mode->kind, kind) == 0)
return mitem;
}
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(const struct team_mode *mode)
{
int err = 0;
struct team_mode_item *mitem;
if (!is_good_mode_name(mode->kind) ||
mode->priv_size > TEAM_MODE_PRIV_SIZE)
return -EINVAL;
mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
if (!mitem)
return -ENOMEM;
spin_lock(&mode_list_lock);
if (__find_mode(mode->kind)) {
err = -EEXIST;
kfree(mitem);
goto unlock;
}
mitem->mode = mode;
list_add_tail(&mitem->list, &mode_list);
unlock:
spin_unlock(&mode_list_lock);
return err;
}
EXPORT_SYMBOL(team_mode_register);
void team_mode_unregister(const struct team_mode *mode)
{
struct team_mode_item *mitem;
spin_lock(&mode_list_lock);
mitem = __find_mode(mode->kind);
if (mitem) {
list_del_init(&mitem->list);
kfree(mitem);
}
spin_unlock(&mode_list_lock);
}
EXPORT_SYMBOL(team_mode_unregister);
static const struct team_mode *team_mode_get(const char *kind)
{
struct team_mode_item *mitem;
const struct team_mode *mode = NULL;
if (!try_module_get(THIS_MODULE))
return NULL;
spin_lock(&mode_list_lock);
mitem = __find_mode(kind);
if (!mitem) {
spin_unlock(&mode_list_lock);
request_module("team-mode-%s", kind);
spin_lock(&mode_list_lock);
mitem = __find_mode(kind);
}
if (mitem) {
mode = mitem->mode;
if (!try_module_get(mode->owner))
mode = NULL;
}
spin_unlock(&mode_list_lock);
module_put(THIS_MODULE);
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;
}
static rx_handler_result_t team_dummy_receive(struct team *team,
struct team_port *port,
struct sk_buff *skb)
{
return RX_HANDLER_ANOTHER;
}
static const struct team_mode __team_no_mode = {
.kind = "*NOMODE*",
};
static bool team_is_mode_set(struct team *team)
{
return team->mode != &__team_no_mode;
}
static void team_set_no_mode(struct team *team)
{
team->user_carrier_enabled = false;
team->mode = &__team_no_mode;
}
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 (!team->en_port_count || !team_is_mode_set(team) ||
!team->mode->ops->transmit)
team->ops.transmit = team_dummy_transmit;
else
team->ops.transmit = team->mode->ops->transmit;
if (!team->en_port_count || !team_is_mode_set(team) ||
!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_is_mode_set(team)) {
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_set_no_mode(team);
/* 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)
{
const 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_is_mode_set(team) && 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;
}
/*********************
* Peers notification
*********************/
static void team_notify_peers_work(struct work_struct *work)
{
struct team *team;
int val;
team = container_of(work, struct team, notify_peers.dw.work);
if (!rtnl_trylock()) {
schedule_delayed_work(&team->notify_peers.dw, 0);
return;
}
val = atomic_dec_if_positive(&team->notify_peers.count_pending);
if (val < 0) {
rtnl_unlock();
return;
}
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
rtnl_unlock();
if (val)
schedule_delayed_work(&team->notify_peers.dw,
msecs_to_jiffies(team->notify_peers.interval));
}
static void team_notify_peers(struct team *team)
{
if (!team->notify_peers.count || !netif_running(team->dev))
return;
atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
schedule_delayed_work(&team->notify_peers.dw, 0);
}
static void team_notify_peers_init(struct team *team)
{
INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
}
static void team_notify_peers_fini(struct team *team)
{
cancel_delayed_work_sync(&team->notify_peers.dw);
}
/*******************************
* Send multicast group rejoins
*******************************/
static void team_mcast_rejoin_work(struct work_struct *work)
{
struct team *team;
int val;
team = container_of(work, struct team, mcast_rejoin.dw.work);
if (!rtnl_trylock()) {
schedule_delayed_work(&team->mcast_rejoin.dw, 0);
return;
}
val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
if (val < 0) {
rtnl_unlock();
return;
}
call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
rtnl_unlock();
if (val)
schedule_delayed_work(&team->mcast_rejoin.dw,
msecs_to_jiffies(team->mcast_rejoin.interval));
}
static void team_mcast_rejoin(struct team *team)
{
if (!team->mcast_rejoin.count || !netif_running(team->dev))
return;
atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
schedule_delayed_work(&team->mcast_rejoin.dw, 0);
}
static void team_mcast_rejoin_init(struct team *team)
{
INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
}
static void team_mcast_rejoin_fini(struct team *team)
{
cancel_delayed_work_sync(&team->mcast_rejoin.dw);
}
/************************
* 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;
if (!team_port_enabled(port)) {
if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
/* link-local packets are mostly useful when stack receives them
* with the link they arrive on.
*/
return RX_HANDLER_PASS;
/* allow exact match delivery for disabled ports */
res = RX_HANDLER_EXACT;
} else {
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);
u64_stats_inc(&pcpu_stats->rx_packets);
u64_stats_add(&pcpu_stats->rx_bytes, skb->len);
if (skb->pkt_type == PACKET_MULTICAST)
u64_stats_inc(&pcpu_stats->rx_multicast);
u64_stats_update_end(&pcpu_stats->syncp);
skb->dev = team->dev;
} else if (res == RX_HANDLER_EXACT) {
this_cpu_inc(team->pcpu_stats->rx_nohandler);
} else {
this_cpu_inc(team->pcpu_stats->rx_dropped);
}
return res;
}
/*************************************
* Multiqueue Tx port select override
*************************************/
static int team_queue_override_init(struct team *team)
{
struct list_head *listarr;
unsigned int queue_cnt = team->dev->num_tx_queues - 1;
unsigned int i;
if (!queue_cnt)
return 0;
listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
GFP_KERNEL);
if (!listarr)
return -ENOMEM;
team->qom_lists = listarr;
for (i = 0; i < queue_cnt; i++)
INIT_LIST_HEAD(listarr++);
return 0;
}
static void team_queue_override_fini(struct team *team)
{
kfree(team->qom_lists);
}
static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
{
return &team->qom_lists[queue_id - 1];
}
/*
* note: already called with rcu_read_lock
*/
static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
{
struct list_head *qom_list;
struct team_port *port;
if (!team->queue_override_enabled || !skb->queue_mapping)
return false;
qom_list = __team_get_qom_list(team, skb->queue_mapping);
list_for_each_entry_rcu(port, qom_list, qom_list) {
if (!team_dev_queue_xmit(team, port, skb))
return true;
}
return false;
}
static void __team_queue_override_port_del(struct team *team,
struct team_port *port)
{
if (!port->queue_id)
return;
list_del_rcu(&port->qom_list);
}
static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
struct team_port *cur)
{
if (port->priority < cur->priority)
return true;
if (port->priority > cur->priority)
return false;
if (port->index < cur->index)
return true;
return false;
}
static void __team_queue_override_port_add(struct team *team,
struct team_port *port)
{
struct team_port *cur;
struct list_head *qom_list;
struct list_head *node;
if (!port->queue_id)
return;
qom_list = __team_get_qom_list(team, port->queue_id);
node = qom_list;
list_for_each_entry(cur, qom_list, qom_list) {
if (team_queue_override_port_has_gt_prio_than(port, cur))
break;
node = &cur->qom_list;
}
list_add_tail_rcu(&port->qom_list, node);
}
static void __team_queue_override_enabled_check(struct team *team)
{
struct team_port *port;
bool enabled = false;
list_for_each_entry(port, &team->port_list, list) {
if (port->queue_id) {
enabled = true;
break;
}
}
if (enabled == team->queue_override_enabled)
return;
netdev_dbg(team->dev, "%s queue override\n",
enabled ? "Enabling" : "Disabling");
team->queue_override_enabled = enabled;
}
static void team_queue_override_port_prio_changed(struct team *team,
struct team_port *port)
{
if (!port->queue_id || team_port_enabled(port))
return;
__team_queue_override_port_del(team, port);
__team_queue_override_port_add(team, port);
__team_queue_override_enabled_check(team);
}
static void team_queue_override_port_change_queue_id(struct team *team,
struct team_port *port,
u16 new_queue_id)
{
if (team_port_enabled(port)) {
__team_queue_override_port_del(team, port);
port->queue_id = new_queue_id;
__team_queue_override_port_add(team, port);
__team_queue_override_enabled_check(team);
} else {
port->queue_id = new_queue_id;
}
}
static void team_queue_override_port_add(struct team *team,
struct team_port *port)
{
__team_queue_override_port_add(team, port);
__team_queue_override_enabled_check(team);
}
static void team_queue_override_port_del(struct team *team,
struct team_port *port)
{
__team_queue_override_port_del(team, port);
__team_queue_override_enabled_check(team);
}
/****************
* 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;
}
/*
* Enable/disable port by adding to enabled port hashlist and setting
* port->index (Might be racy so reader could see incorrect ifindex when
* processing a flying packet, but that is not a problem). Write guarded
* by team->lock.
*/
static void team_port_enable(struct team *team,
struct team_port *port)
{
if (team_port_enabled(port))
return;
port->index = team->en_port_count++;
hlist_add_head_rcu(&port->hlist,
team_port_index_hash(team, port->index));
team_adjust_ops(team);
team_queue_override_port_add(team, port);
if (team->ops.port_enabled)
team->ops.port_enabled(team, port);
team_notify_peers(team);
team_mcast_rejoin(team);
team_lower_state_changed(port);
}
static void __reconstruct_port_hlist(struct team *team, int rm_index)
{
int i;
struct team_port *port;
for (i = rm_index + 1; i < team->en_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_disable(struct team *team,
struct team_port *port)
{
if (!team_port_enabled(port))
return;
if (team->ops.port_disabled)
team->ops.port_disabled(team, port);
hlist_del_rcu(&port->hlist);
__reconstruct_port_hlist(team, port->index);
port->index = -1;
team->en_port_count--;
team_queue_override_port_del(team, port);
team_adjust_ops(team);
team_lower_state_changed(port);
}
#define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
NETIF_F_HIGHDMA | NETIF_F_LRO)
#define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
static void __team_compute_features(struct team *team)
{
struct team_port *port;
netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
NETIF_F_ALL_FOR_ALL;
netdev_features_t enc_features = TEAM_ENC_FEATURES;
unsigned short max_hard_header_len = ETH_HLEN;
unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
IFF_XMIT_DST_RELEASE_PERM;
rcu_read_lock();
list_for_each_entry_rcu(port, &team->port_list, list) {
vlan_features = netdev_increment_features(vlan_features,
port->dev->vlan_features,
TEAM_VLAN_FEATURES);
enc_features =
netdev_increment_features(enc_features,
port->dev->hw_enc_features,
TEAM_ENC_FEATURES);
dst_release_flag &= port->dev->priv_flags;
if (port->dev->hard_header_len > max_hard_header_len)
max_hard_header_len = port->dev->hard_header_len;
}
rcu_read_unlock();
team->dev->vlan_features = vlan_features;
team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_TX;
team->dev->hard_header_len = max_hard_header_len;
team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
}
static void team_compute_features(struct team *team)
{
__team_compute_features(team);
netdev_change_features(team->dev);
}
static int team_port_enter(struct team *team, struct team_port *port)
{
int err = 0;
dev_hold(team->dev);
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:
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);
dev_put(team->dev);
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static int __team_port_enable_netpoll(struct team_port *port)
{
struct netpoll *np;
int err;
np = kzalloc(sizeof(*np), GFP_KERNEL);
if (!np)
return -ENOMEM;
err = __netpoll_setup(np, port->dev);
if (err) {
kfree(np);
return err;
}
port->np = np;
return err;
}
static int team_port_enable_netpoll(struct team_port *port)
{
if (!port->team->dev->npinfo)
return 0;
return __team_port_enable_netpoll(port);
}
static void team_port_disable_netpoll(struct team_port *port)
{
struct netpoll *np = port->np;
if (!np)
return;
port->np = NULL;
__netpoll_free(np);
}
#else
static int team_port_enable_netpoll(struct team_port *port)
{
return 0;
}
static void team_port_disable_netpoll(struct team_port *port)
{
}
#endif
static int team_upper_dev_link(struct team *team, struct team_port *port,
struct netlink_ext_ack *extack)
{
struct netdev_lag_upper_info lag_upper_info;
int err;
lag_upper_info.tx_type = team->mode->lag_tx_type;
lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
&lag_upper_info, extack);
if (err)
return err;
port->dev->priv_flags |= IFF_TEAM_PORT;
return 0;
}
static void team_upper_dev_unlink(struct team *team, struct team_port *port)
{
netdev_upper_dev_unlink(port->dev, team->dev);
port->dev->priv_flags &= ~IFF_TEAM_PORT;
}
static void __team_port_change_port_added(struct team_port *port, bool linkup);
static int team_dev_type_check_change(struct net_device *dev,
struct net_device *port_dev);
static int team_port_add(struct team *team, struct net_device *port_dev,
struct netlink_ext_ack *extack)
{
struct net_device *dev = team->dev;
struct team_port *port;
char *portname = port_dev->name;
int err;
if (port_dev->flags & IFF_LOOPBACK) {
NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
portname);
return -EINVAL;
}
if (netif_is_team_port(port_dev)) {
NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
netdev_err(dev, "Device %s is already a port "
"of a team device\n", portname);
return -EBUSY;
}
if (dev == port_dev) {
NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
netdev_err(dev, "Cannot enslave team device to itself\n");
return -EINVAL;
}
if (netdev_has_upper_dev(dev, port_dev)) {
NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
netdev_err(dev, "Device %s is already an upper device of the team interface\n",
portname);
return -EBUSY;
}
if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
vlan_uses_dev(dev)) {
NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
portname);
return -EPERM;
}
err = team_dev_type_check_change(dev, port_dev);
if (err)
return err;
if (port_dev->flags & IFF_UP) {
NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
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) + team->mode->port_priv_size,
GFP_KERNEL);
if (!port)
return -ENOMEM;
port->dev = port_dev;
port->team = team;
INIT_LIST_HEAD(&port->qom_list);
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, port_dev->addr_len);
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, extack);
if (err) {
netdev_dbg(dev, "Device %s opening failed\n",
portname);
goto err_dev_open;
}
err = vlan_vids_add_by_dev(port_dev, dev);
if (err) {
netdev_err(dev, "Failed to add vlan ids to device %s\n",
portname);
goto err_vids_add;
}
err = team_port_enable_netpoll(port);
if (err) {
netdev_err(dev, "Failed to enable netpoll on device %s\n",
portname);
goto err_enable_netpoll;
}
if (!(dev->features & NETIF_F_LRO))
dev_disable_lro(port_dev);
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;
}
err = team_upper_dev_link(team, port, extack);
if (err) {
netdev_err(dev, "Device %s failed to set upper link\n",
portname);
goto err_set_upper_link;
}
err = __team_option_inst_add_port(team, port);
if (err) {
netdev_err(dev, "Device %s failed to add per-port options\n",
portname);
goto err_option_port_add;
}
/* set promiscuity level to new slave */
if (dev->flags & IFF_PROMISC) {
err = dev_set_promiscuity(port_dev, 1);
if (err)
goto err_set_slave_promisc;
}
/* set allmulti level to new slave */
if (dev->flags & IFF_ALLMULTI) {
err = dev_set_allmulti(port_dev, 1);
if (err) {
if (dev->flags & IFF_PROMISC)
dev_set_promiscuity(port_dev, -1);
goto err_set_slave_promisc;
}
}
if (dev->flags & IFF_UP) {
netif_addr_lock_bh(dev);
dev_uc_sync_multiple(port_dev, dev);
dev_mc_sync_multiple(port_dev, dev);
netif_addr_unlock_bh(dev);
}
port->index = -1;
list_add_tail_rcu(&port->list, &team->port_list);
team_port_enable(team, port);
__team_compute_features(team);
__team_port_change_port_added(port, !!netif_oper_up(port_dev));
__team_options_change_check(team);
netdev_info(dev, "Port device %s added\n", portname);
return 0;
err_set_slave_promisc:
__team_option_inst_del_port(team, port);
err_option_port_add:
team_upper_dev_unlink(team, port);
err_set_upper_link:
netdev_rx_handler_unregister(port_dev);
err_handler_register:
team_port_disable_netpoll(port);
err_enable_netpoll:
vlan_vids_del_by_dev(port_dev, dev);
err_vids_add:
dev_close(port_dev);
err_dev_open:
team_port_leave(team, port);
team_port_set_orig_dev_addr(port);
err_port_enter:
dev_set_mtu(port_dev, port->orig.mtu);
err_set_mtu:
kfree(port);
return err;
}
static void __team_port_change_port_removed(struct team_port *port);
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_disable(team, port);
list_del_rcu(&port->list);
if (dev->flags & IFF_PROMISC)
dev_set_promiscuity(port_dev, -1);
if (dev->flags & IFF_ALLMULTI)
dev_set_allmulti(port_dev, -1);
team_upper_dev_unlink(team, port);
netdev_rx_handler_unregister(port_dev);
team_port_disable_netpoll(port);
vlan_vids_del_by_dev(port_dev, dev);
if (dev->flags & IFF_UP) {
dev_uc_unsync(port_dev, dev);
dev_mc_unsync(port_dev, dev);
}
dev_close(port_dev);
team_port_leave(team, port);
__team_option_inst_mark_removed_port(team, port);
__team_options_change_check(team);
__team_option_inst_del_port(team, port);
__team_port_change_port_removed(port);
team_port_set_orig_dev_addr(port);
dev_set_mtu(port_dev, port->orig.mtu);
kfree_rcu(port, rcu);
netdev_info(dev, "Port device %s removed\n", portname);
__team_compute_features(team);
return 0;
}
/*****************
* Net device ops
*****************/
static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
{
ctx->data.str_val = team->mode->kind;
return 0;
}
static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
{
return team_change_mode(team, ctx->data.str_val);
}
static int team_notify_peers_count_get(struct team *team,
struct team_gsetter_ctx *ctx)
{
ctx->data.u32_val = team->notify_peers.count;
return 0;
}
static int team_notify_peers_count_set(struct team *team,
struct team_gsetter_ctx *ctx)
{
team->notify_peers.count = ctx->data.u32_val;
return 0;
}
static int team_notify_peers_interval_get(struct team *team,
struct team_gsetter_ctx *ctx)
{
ctx->data.u32_val = team->notify_peers.interval;
return 0;
}
static int team_notify_peers_interval_set(struct team *team,
struct team_gsetter_ctx *ctx)
{
team->notify_peers.interval = ctx->data.u32_val;
return 0;
}
static int team_mcast_rejoin_count_get(struct team *team,
struct team_gsetter_ctx *ctx)
{
ctx->data.u32_val = team->mcast_rejoin.count;
return 0;
}
static int team_mcast_rejoin_count_set(struct team *team,
struct team_gsetter_ctx *ctx)
{
team->mcast_rejoin.count = ctx->data.u32_val;
return 0;
}
static int team_mcast_rejoin_interval_get(struct team *team,
struct team_gsetter_ctx *ctx)
{
ctx->data.u32_val = team->mcast_rejoin.interval;
return 0;
}
static int team_mcast_rejoin_interval_set(struct team *team,
struct team_gsetter_ctx *ctx)
{
team->mcast_rejoin.interval = ctx->data.u32_val;
return 0;
}
static int team_port_en_option_get(struct team *team,
struct team_gsetter_ctx *ctx)
{
struct team_port *port = ctx->info->port;
ctx->data.bool_val = team_port_enabled(port);
return 0;
}
static int team_port_en_option_set(struct team *team,
struct team_gsetter_ctx *ctx)
{
struct team_port *port = ctx->info->port;
if (ctx->data.bool_val)
team_port_enable(team, port);
else
team_port_disable(team, port);
return 0;
}
static int team_user_linkup_option_get(struct team *team,
struct team_gsetter_ctx *ctx)
{
struct team_port *port = ctx->info->port;
ctx->data.bool_val = port->user.linkup;
return 0;
}
static void __team_carrier_check(struct team *team);
static int team_user_linkup_option_set(struct team *team,
struct team_gsetter_ctx *ctx)
{
struct team_port *port = ctx->info->port;
port->user.linkup = ctx->data.bool_val;
team_refresh_port_linkup(port);
__team_carrier_check(port->team);
return 0;
}
static int team_user_linkup_en_option_get(struct team *team,
struct team_gsetter_ctx *ctx)
{
struct team_port *port = ctx->info->port;
ctx->data.bool_val = port->user.linkup_enabled;
return 0;
}
static int team_user_linkup_en_option_set(struct team *team,
struct team_gsetter_ctx *ctx)
{
struct team_port *port = ctx->info->port;
port->user.linkup_enabled = ctx->data.bool_val;
team_refresh_port_linkup(port);
__team_carrier_check(port->team);
return 0;
}
static int team_priority_option_get(struct team *team,
struct team_gsetter_ctx *ctx)
{
struct team_port *port = ctx->info->port;
ctx->data.s32_val = port->priority;
return 0;
}
static int team_priority_option_set(struct team *team,
struct team_gsetter_ctx *ctx)
{
struct team_port *port = ctx->info->port;
s32 priority = ctx->data.s32_val;
if (port->priority == priority)
return 0;
port->priority = priority;
team_queue_override_port_prio_changed(team, port);
return 0;
}
static int team_queue_id_option_get(struct team *team,
struct team_gsetter_ctx *ctx)
{
struct team_port *port = ctx->info->port;
ctx->data.u32_val = port->queue_id;
return 0;
}
static int team_queue_id_option_set(struct team *team,
struct team_gsetter_ctx *ctx)
{
struct team_port *port = ctx->info->port;
u16 new_queue_id = ctx->data.u32_val;
if (port->queue_id == new_queue_id)
return 0;
if (new_queue_id >= team->dev->real_num_tx_queues)
return -EINVAL;
team_queue_override_port_change_queue_id(team, port, new_queue_id);
return 0;
}
static const struct team_option team_options[] = {
{
.name = "mode",
.type = TEAM_OPTION_TYPE_STRING,
.getter = team_mode_option_get,
.setter = team_mode_option_set,
},
{
.name = "notify_peers_count",
.type = TEAM_OPTION_TYPE_U32,
.getter = team_notify_peers_count_get,
.setter = team_notify_peers_count_set,
},
{
.name = "notify_peers_interval",
.type = TEAM_OPTION_TYPE_U32,
.getter = team_notify_peers_interval_get,
.setter = team_notify_peers_interval_set,
},
{
.name = "mcast_rejoin_count",
.type = TEAM_OPTION_TYPE_U32,
.getter = team_mcast_rejoin_count_get,
.setter = team_mcast_rejoin_count_set,
},
{
.name = "mcast_rejoin_interval",
.type = TEAM_OPTION_TYPE_U32,
.getter = team_mcast_rejoin_interval_get,
.setter = team_mcast_rejoin_interval_set,
},
{
.name = "enabled",
.type = TEAM_OPTION_TYPE_BOOL,
.per_port = true,
.getter = team_port_en_option_get,
.setter = team_port_en_option_set,
},
{
.name = "user_linkup",
.type = TEAM_OPTION_TYPE_BOOL,
.per_port = true,
.getter = team_user_linkup_option_get,
.setter = team_user_linkup_option_set,
},
{
.name = "user_linkup_enabled",
.type = TEAM_OPTION_TYPE_BOOL,
.per_port = true,
.getter = team_user_linkup_en_option_get,
.setter = team_user_linkup_en_option_set,
},
{
.name = "priority",
.type = TEAM_OPTION_TYPE_S32,
.per_port = true,
.getter = team_priority_option_get,
.setter = team_priority_option_set,
},
{
.name = "queue_id",
.type = TEAM_OPTION_TYPE_U32,
.per_port = true,
.getter = team_queue_id_option_get,
.setter = team_queue_id_option_set,
},
};
static int team_init(struct net_device *dev)
{
struct team *team = netdev_priv(dev);
int i;
int err;
team->dev = dev;
team_set_no_mode(team);
team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
if (!team->pcpu_stats)
return -ENOMEM;
for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
INIT_HLIST_HEAD(&team->en_port_hlist[i]);
INIT_LIST_HEAD(&team->port_list);
err = team_queue_override_init(team);
if (err)
goto err_team_queue_override_init;
team_adjust_ops(team);
INIT_LIST_HEAD(&team->option_list);
INIT_LIST_HEAD(&team->option_inst_list);
team_notify_peers_init(team);
team_mcast_rejoin_init(team);
err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
if (err)
goto err_options_register;
netif_carrier_off(dev);
lockdep_register_key(&team->team_lock_key);
__mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
netdev_lockdep_set_classes(dev);
return 0;
err_options_register:
team_mcast_rejoin_fini(team);
team_notify_peers_fini(team);
team_queue_override_fini(team);
err_team_queue_override_init:
free_percpu(team->pcpu_stats);
return err;
}
static void team_uninit(struct net_device *dev)
{
struct team *team = netdev_priv(dev);
struct team_port *port;
struct team_port *tmp;
mutex_lock(&team->lock);
list_for_each_entry_safe(port, tmp, &team->port_list, list)
team_port_del(team, port->dev);
__team_change_mode(team, NULL); /* cleanup */
__team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
team_mcast_rejoin_fini(team);
team_notify_peers_fini(team);
team_queue_override_fini(team);
mutex_unlock(&team->lock);
netdev_change_features(dev);
lockdep_unregister_key(&team->team_lock_key);
}
static void team_destructor(struct net_device *dev)
{
struct team *team = netdev_priv(dev);
free_percpu(team->pcpu_stats);
}
static int team_open(struct net_device *dev)
{
return 0;
}
static int team_close(struct net_device *dev)
{
struct team *team = netdev_priv(dev);
struct team_port *port;
list_for_each_entry(port, &team->port_list, list) {
dev_uc_unsync(port->dev, dev);
dev_mc_unsync(port->dev, 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;
unsigned int len = skb->len;
tx_success = team_queue_override_transmit(team, skb);
if (!tx_success)
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);
u64_stats_inc(&pcpu_stats->tx_packets);
u64_stats_add(&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 u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev)
{
/*
* This helper function exists to help dev_pick_tx get the correct
* destination queue. Using a helper function skips a call to
* skb_tx_hash and will put the skbs in the queue we expect on their
* way down to the team driver.
*/
u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
/*
* Save the original txq to restore before passing to the driver
*/
qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
if (unlikely(txq >= dev->real_num_tx_queues)) {
do {
txq -= dev->real_num_tx_queues;
} while (txq >= dev->real_num_tx_queues);
}
return txq;
}
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_multiple(port->dev, dev);
dev_mc_sync_multiple(port->dev, dev);
}
rcu_read_unlock();
}
static int team_set_mac_address(struct net_device *dev, void *p)
{
struct sockaddr *addr = p;
struct team *team = netdev_priv(dev);
struct team_port *port;
if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
dev_addr_set(dev, addr->sa_data);
mutex_lock(&team->lock);
list_for_each_entry(port, &team->port_list, list)
if (team->ops.port_change_dev_addr)
team->ops.port_change_dev_addr(team, port);
mutex_unlock(&team->lock);
return 0;
}
static int team_change_mtu(struct net_device *dev, int new_mtu)
{
struct team *team = netdev_priv(dev);
struct team_port *port;
int err;
/*
* Alhough this is reader, it's guarded by team lock. It's not possible
* to traverse list in reverse under rcu_read_lock
*/
mutex_lock(&team->lock);
team->port_mtu_change_allowed = true;
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;
}
}
team->port_mtu_change_allowed = false;
mutex_unlock(&team->lock);
dev->mtu = new_mtu;
return 0;
unwind:
list_for_each_entry_continue_reverse(port, &team->port_list, list)
dev_set_mtu(port->dev, dev->mtu);
team->port_mtu_change_allowed = false;
mutex_unlock(&team->lock);
return err;
}
static void
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, rx_nohandler = 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(&p->syncp);
rx_packets = u64_stats_read(&p->rx_packets);
rx_bytes = u64_stats_read(&p->rx_bytes);
rx_multicast = u64_stats_read(&p->rx_multicast);
tx_packets = u64_stats_read(&p->tx_packets);
tx_bytes = u64_stats_read(&p->tx_bytes);
} while (u64_stats_fetch_retry(&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 & rx_nohandler are u32,
* updated without syncp protection.
*/
rx_dropped += READ_ONCE(p->rx_dropped);
tx_dropped += READ_ONCE(p->tx_dropped);
rx_nohandler += READ_ONCE(p->rx_nohandler);
}
stats->rx_dropped = rx_dropped;
stats->tx_dropped = tx_dropped;
stats->rx_nohandler = rx_nohandler;
}
static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
{
struct team *team = netdev_priv(dev);
struct team_port *port;
int err;
/*
* Alhough this is reader, it's guarded by team lock. It's not possible
* to traverse list in reverse under rcu_read_lock
*/
mutex_lock(&team->lock);
list_for_each_entry(port, &team->port_list, list) {
err = vlan_vid_add(port->dev, proto, vid);
if (err)
goto unwind;
}
mutex_unlock(&team->lock);
return 0;
unwind:
list_for_each_entry_continue_reverse(port, &team->port_list, list)
vlan_vid_del(port->dev, proto, vid);
mutex_unlock(&team->lock);
return err;
}
static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
{
struct team *team = netdev_priv(dev);
struct team_port *port;
mutex_lock(&team->lock);
list_for_each_entry(port, &team->port_list, list)
vlan_vid_del(port->dev, proto, vid);
mutex_unlock(&team->lock);
return 0;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void team_poll_controller(struct net_device *dev)
{
}
static void __team_netpoll_cleanup(struct team *team)
{
struct team_port *port;
list_for_each_entry(port, &team->port_list, list)
team_port_disable_netpoll(port);
}
static void team_netpoll_cleanup(struct net_device *dev)
{
struct team *team = netdev_priv(dev);
mutex_lock(&team->lock);
__team_netpoll_cleanup(team);
mutex_unlock(&team->lock);
}
static int team_netpoll_setup(struct net_device *dev,
struct netpoll_info *npifo)
{
struct team *team = netdev_priv(dev);
struct team_port *port;
int err = 0;
mutex_lock(&team->lock);
list_for_each_entry(port, &team->port_list, list) {
err = __team_port_enable_netpoll(port);
if (err) {
__team_netpoll_cleanup(team);
break;
}
}
mutex_unlock(&team->lock);
return err;
}
#endif
static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
struct netlink_ext_ack *extack)
{
struct team *team = netdev_priv(dev);
int err;
mutex_lock(&team->lock);
err = team_port_add(team, port_dev, extack);
mutex_unlock(&team->lock);
if (!err)
netdev_change_features(dev);
return err;
}
static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
{
struct team *team = netdev_priv(dev);
int err;
mutex_lock(&team->lock);
err = team_port_del(team, port_dev);
mutex_unlock(&team->lock);
if (err)
return err;
if (netif_is_team_master(port_dev)) {
lockdep_unregister_key(&team->team_lock_key);
lockdep_register_key(&team->team_lock_key);
lockdep_set_class(&team->lock, &team->team_lock_key);
}
netdev_change_features(dev);
return err;
}
static netdev_features_t team_fix_features(struct net_device *dev,
netdev_features_t features)
{
struct team_port *port;
struct team *team = netdev_priv(dev);
netdev_features_t mask;
mask = features;
features &= ~NETIF_F_ONE_FOR_ALL;
features |= NETIF_F_ALL_FOR_ALL;
rcu_read_lock();
list_for_each_entry_rcu(port, &team->port_list, list) {
features = netdev_increment_features(features,
port->dev->features,
mask);
}
rcu_read_unlock();
features = netdev_add_tso_features(features, mask);
return features;
}
static int team_change_carrier(struct net_device *dev, bool new_carrier)
{
struct team *team = netdev_priv(dev);
team->user_carrier_enabled = true;
if (new_carrier)
netif_carrier_on(dev);
else
netif_carrier_off(dev);
return 0;
}
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_select_queue = team_select_queue,
.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,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = team_poll_controller,
.ndo_netpoll_setup = team_netpoll_setup,
.ndo_netpoll_cleanup = team_netpoll_cleanup,
#endif
.ndo_add_slave = team_add_slave,
.ndo_del_slave = team_del_slave,
.ndo_fix_features = team_fix_features,
.ndo_change_carrier = team_change_carrier,
.ndo_features_check = passthru_features_check,
};
/***********************
* ethtool interface
***********************/
static void team_ethtool_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *drvinfo)
{
strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
}
static int team_ethtool_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct team *team= netdev_priv(dev);
unsigned long speed = 0;
struct team_port *port;
cmd->base.duplex = DUPLEX_UNKNOWN;
cmd->base.port = PORT_OTHER;
rcu_read_lock();
list_for_each_entry_rcu(port, &team->port_list, list) {
if (team_port_txable(port)) {
if (port->state.speed != SPEED_UNKNOWN)
speed += port->state.speed;
if (cmd->base.duplex == DUPLEX_UNKNOWN &&
port->state.duplex != DUPLEX_UNKNOWN)
cmd->base.duplex = port->state.duplex;
}
}
rcu_read_unlock();
cmd->base.speed = speed ? : SPEED_UNKNOWN;
return 0;
}
static const struct ethtool_ops team_ethtool_ops = {
.get_drvinfo = team_ethtool_get_drvinfo,
.get_link = ethtool_op_get_link,
.get_link_ksettings = team_ethtool_get_link_ksettings,
};
/***********************
* rt netlink interface
***********************/
static void team_setup_by_port(struct net_device *dev,
struct net_device *port_dev)
{
dev->header_ops = port_dev->header_ops;
dev->type = port_dev->type;
dev->hard_header_len = port_dev->hard_header_len;
dev->needed_headroom = port_dev->needed_headroom;
dev->addr_len = port_dev->addr_len;
dev->mtu = port_dev->mtu;
memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
eth_hw_addr_inherit(dev, port_dev);
}
static int team_dev_type_check_change(struct net_device *dev,
struct net_device *port_dev)
{
struct team *team = netdev_priv(dev);
char *portname = port_dev->name;
int err;
if (dev->type == port_dev->type)
return 0;
if (!list_empty(&team->port_list)) {
netdev_err(dev, "Device %s is of different type\n", portname);
return -EBUSY;
}
err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
err = notifier_to_errno(err);
if (err) {
netdev_err(dev, "Refused to change device type\n");
return err;
}
dev_uc_flush(dev);
dev_mc_flush(dev);
team_setup_by_port(dev, port_dev);
call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
return 0;
}
static void team_setup(struct net_device *dev)
{
ether_setup(dev);
dev->max_mtu = ETH_MAX_MTU;
dev->netdev_ops = &team_netdev_ops;
dev->ethtool_ops = &team_ethtool_ops;
dev->needs_free_netdev = true;
dev->priv_destructor = team_destructor;
dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
dev->priv_flags |= IFF_NO_QUEUE;
dev->priv_flags |= IFF_TEAM;
/*
* 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 | IFF_LIVE_ADDR_CHANGE;
dev->features |= NETIF_F_LLTX;
dev->features |= NETIF_F_GRO;
/* Don't allow team devices to change network namespaces. */
dev->features |= NETIF_F_NETNS_LOCAL;
dev->hw_features = TEAM_VLAN_FEATURES |
NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_CTAG_FILTER;
dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
dev->features |= dev->hw_features;
dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
}
static int team_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
if (tb[IFLA_ADDRESS] == NULL)
eth_hw_addr_random(dev);
return register_netdevice(dev);
}
static int team_validate(struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
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 unsigned int team_get_num_tx_queues(void)
{
return TEAM_DEFAULT_NUM_TX_QUEUES;
}
static unsigned int team_get_num_rx_queues(void)
{
return TEAM_DEFAULT_NUM_RX_QUEUES;
}
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,
.get_num_tx_queues = team_get_num_tx_queues,
.get_num_rx_queues = team_get_num_rx_queues,
};
/***********************************
* Generic netlink custom interface
***********************************/
static struct genl_family team_nl_family;
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 },
[TEAM_ATTR_OPTION_PORT_IFINDEX] = { .type = NLA_U32 },
[TEAM_ATTR_OPTION_ARRAY_INDEX] = { .type = NLA_U32 },
};
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_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
&team_nl_family, 0, TEAM_CMD_NOOP);
if (!hdr) {
err = -EMSGSIZE;
goto err_msg_put;
}
genlmsg_end(msg, hdr);
return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
err_msg_put:
nlmsg_free(msg);
return err;
}
/*
* Netlink cmd functions should be locked by following two functions.
* Since dev gets held here, that ensures dev won't disappear in between.
*/
static struct team *team_nl_team_get(struct genl_info *info)
{
struct net *net = genl_info_net(info);
int ifindex;
struct net_device *dev;
struct team *team;
if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
return NULL;
ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
dev = dev_get_by_index(net, ifindex);
if (!dev || dev->netdev_ops != &team_netdev_ops) {
if (dev)
dev_put(dev);
return NULL;
}
team = netdev_priv(dev);
mutex_lock(&team->lock);
return team;
}
static void team_nl_team_put(struct team *team)
{
mutex_unlock(&team->lock);
dev_put(team->dev);
}
typedef int team_nl_send_func_t(struct sk_buff *skb,
struct team *team, u32 portid);
static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
{
return genlmsg_unicast(dev_net(team->dev), skb, portid);
}
static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
struct team_option_inst *opt_inst)
{
struct nlattr *option_item;
struct team_option *option = opt_inst->option;
struct team_option_inst_info *opt_inst_info = &opt_inst->info;
struct team_gsetter_ctx ctx;
int err;
ctx.info = opt_inst_info;
err = team_option_get(team, opt_inst, &ctx);
if (err)
return err;
option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
if (!option_item)
return -EMSGSIZE;
if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
goto nest_cancel;
if (opt_inst_info->port &&
nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
opt_inst_info->port->dev->ifindex))
goto nest_cancel;
if (opt_inst->option->array_size &&
nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
opt_inst_info->array_index))
goto nest_cancel;
switch (option->type) {
case TEAM_OPTION_TYPE_U32:
if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
goto nest_cancel;
if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
goto nest_cancel;
break;
case TEAM_OPTION_TYPE_STRING:
if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
goto nest_cancel;
if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
ctx.data.str_val))
goto nest_cancel;
break;
case TEAM_OPTION_TYPE_BINARY:
if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
goto nest_cancel;
if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
ctx.data.bin_val.ptr))
goto nest_cancel;
break;
case TEAM_OPTION_TYPE_BOOL:
if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
goto nest_cancel;
if (ctx.data.bool_val &&
nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
goto nest_cancel;
break;
case TEAM_OPTION_TYPE_S32:
if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
goto nest_cancel;
if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
goto nest_cancel;
break;
default:
BUG();
}
if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
goto nest_cancel;
if (opt_inst->changed) {
if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
goto nest_cancel;
opt_inst->changed = false;
}
nla_nest_end(skb, option_item);
return 0;
nest_cancel:
nla_nest_cancel(skb, option_item);
return -EMSGSIZE;
}
static int __send_and_alloc_skb(struct sk_buff **pskb,
struct team *team, u32 portid,
team_nl_send_func_t *send_func)
{
int err;
if (*pskb) {
err = send_func(*pskb, team, portid);
if (err)
return err;
}
*pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!*pskb)
return -ENOMEM;
return 0;
}
static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
int flags, team_nl_send_func_t *send_func,
struct list_head *sel_opt_inst_list)
{
struct nlattr *option_list;
struct nlmsghdr *nlh;
void *hdr;
struct team_option_inst *opt_inst;
int err;
struct sk_buff *skb = NULL;
bool incomplete;
int i;
opt_inst = list_first_entry(sel_opt_inst_list,
struct team_option_inst, tmp_list);
start_again:
err = __send_and_alloc_skb(&skb, team, portid, send_func);
if (err)
return err;
hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
TEAM_CMD_OPTIONS_GET);
if (!hdr) {
nlmsg_free(skb);
return -EMSGSIZE;
}
if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
goto nla_put_failure;
option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
if (!option_list)
goto nla_put_failure;
i = 0;
incomplete = false;
list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
err = team_nl_fill_one_option_get(skb, team, opt_inst);
if (err) {
if (err == -EMSGSIZE) {
if (!i)
goto errout;
incomplete = true;
break;
}
goto errout;
}
i++;
}
nla_nest_end(skb, option_list);
genlmsg_end(skb, hdr);
if (incomplete)
goto start_again;
send_done:
nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
if (!nlh) {
err = __send_and_alloc_skb(&skb, team, portid, send_func);
if (err)
return err;
goto send_done;
}
return send_func(skb, team, portid);
nla_put_failure:
err = -EMSGSIZE;
errout:
nlmsg_free(skb);
return err;
}
static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
{
struct team *team;
struct team_option_inst *opt_inst;
int err;
LIST_HEAD(sel_opt_inst_list);
team = team_nl_team_get(info);
if (!team)
return -EINVAL;
list_for_each_entry(opt_inst, &team->option_inst_list, list)
list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
NLM_F_ACK, team_nl_send_unicast,
&sel_opt_inst_list);
team_nl_team_put(team);
return err;
}
static int team_nl_send_event_options_get(struct team *team,
struct list_head *sel_opt_inst_list);
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;
rtnl_lock();
team = team_nl_team_get(info);
if (!team) {
err = -EINVAL;
goto rtnl_unlock;
}
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 *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
struct nlattr *attr;
struct nlattr *attr_data;
LIST_HEAD(opt_inst_list);
enum team_option_type opt_type;
int opt_port_ifindex = 0; /* != 0 for per-port options */
u32 opt_array_index = 0;
bool opt_is_array = false;
struct team_option_inst *opt_inst;
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_deprecated(opt_attrs,
TEAM_ATTR_OPTION_MAX,
nl_option,
team_nl_option_policy,
info->extack);
if (err)
goto team_put;
if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
!opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
err = -EINVAL;
goto team_put;
}
switch (nla_get_u8(opt_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;
case NLA_BINARY:
opt_type = TEAM_OPTION_TYPE_BINARY;
break;
case NLA_FLAG:
opt_type = TEAM_OPTION_TYPE_BOOL;
break;
case NLA_S32:
opt_type = TEAM_OPTION_TYPE_S32;
break;
default:
goto team_put;
}
attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
err = -EINVAL;
goto team_put;
}
opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
if (attr)
opt_port_ifindex = nla_get_u32(attr);
attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
if (attr) {
opt_is_array = true;
opt_array_index = nla_get_u32(attr);
}
list_for_each_entry(opt_inst, &team->option_inst_list, list) {
struct team_option *option = opt_inst->option;
struct team_gsetter_ctx ctx;
struct team_option_inst_info *opt_inst_info;
int tmp_ifindex;
opt_inst_info = &opt_inst->info;
tmp_ifindex = opt_inst_info->port ?
opt_inst_info->port->dev->ifindex : 0;
if (option->type != opt_type ||
strcmp(option->name, opt_name) ||
tmp_ifindex != opt_port_ifindex ||
(option->array_size && !opt_is_array) ||
opt_inst_info->array_index != opt_array_index)
continue;
opt_found = true;
ctx.info = opt_inst_info;
switch (opt_type) {
case TEAM_OPTION_TYPE_U32:
ctx.data.u32_val = nla_get_u32(attr_data);
break;
case TEAM_OPTION_TYPE_STRING:
if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
err = -EINVAL;
goto team_put;
}
ctx.data.str_val = nla_data(attr_data);
break;
case TEAM_OPTION_TYPE_BINARY:
ctx.data.bin_val.len = nla_len(attr_data);
ctx.data.bin_val.ptr = nla_data(attr_data);
break;
case TEAM_OPTION_TYPE_BOOL:
ctx.data.bool_val = attr_data ? true : false;
break;
case TEAM_OPTION_TYPE_S32:
ctx.data.s32_val = nla_get_s32(attr_data);
break;
default:
BUG();
}
err = team_option_set(team, opt_inst, &ctx);
if (err)
goto team_put;
opt_inst->changed = true;
list_add(&opt_inst->tmp_list, &opt_inst_list);
}
if (!opt_found) {
err = -ENOENT;
goto team_put;
}
err = team_nl_send_event_options_get(team, &opt_inst_list);
if (err)
break;
}
team_put:
team_nl_team_put(team);
rtnl_unlock:
rtnl_unlock();
return err;
}
static int team_nl_fill_one_port_get(struct sk_buff *skb,
struct team_port *port)
{
struct nlattr *port_item;
port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
if (!port_item)
goto nest_cancel;
if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
goto nest_cancel;
if (port->changed) {
if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
goto nest_cancel;
port->changed = false;
}
if ((port->removed &&
nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
(port->state.linkup &&
nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
goto nest_cancel;
nla_nest_end(skb, port_item);
return 0;
nest_cancel:
nla_nest_cancel(skb, port_item);
return -EMSGSIZE;
}
static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
int flags, team_nl_send_func_t *send_func,
struct team_port *one_port)
{
struct nlattr *port_list;
struct nlmsghdr *nlh;
void *hdr;
struct team_port *port;
int err;
struct sk_buff *skb = NULL;
bool incomplete;
int i;
port = list_first_entry_or_null(&team->port_list,
struct team_port, list);
start_again:
err = __send_and_alloc_skb(&skb, team, portid, send_func);
if (err)
return err;
hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
TEAM_CMD_PORT_LIST_GET);
if (!hdr) {
nlmsg_free(skb);
return -EMSGSIZE;
}
if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
goto nla_put_failure;
port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
if (!port_list)
goto nla_put_failure;
i = 0;
incomplete = false;
/* If one port is selected, called wants to send port list containing
* only this port. Otherwise go through all listed ports and send all
*/
if (one_port) {
err = team_nl_fill_one_port_get(skb, one_port);
if (err)
goto errout;
} else if (port) {
list_for_each_entry_from(port, &team->port_list, list) {
err = team_nl_fill_one_port_get(skb, port);
if (err) {
if (err == -EMSGSIZE) {
if (!i)
goto errout;
incomplete = true;
break;
}
goto errout;
}
i++;
}
}
nla_nest_end(skb, port_list);
genlmsg_end(skb, hdr);
if (incomplete)
goto start_again;
send_done:
nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
if (!nlh) {
err = __send_and_alloc_skb(&skb, team, portid, send_func);
if (err)
return err;
goto send_done;
}
return send_func(skb, team, portid);
nla_put_failure:
err = -EMSGSIZE;
errout:
nlmsg_free(skb);
return err;
}
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_port_list_get(team, info->snd_portid, info->snd_seq,
NLM_F_ACK, team_nl_send_unicast, NULL);
team_nl_team_put(team);
return err;
}
static const struct genl_small_ops team_nl_ops[] = {
{
.cmd = TEAM_CMD_NOOP,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = team_nl_cmd_noop,
},
{
.cmd = TEAM_CMD_OPTIONS_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = team_nl_cmd_options_set,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = TEAM_CMD_OPTIONS_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = team_nl_cmd_options_get,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = TEAM_CMD_PORT_LIST_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = team_nl_cmd_port_list_get,
.flags = GENL_ADMIN_PERM,
},
};
static const struct genl_multicast_group team_nl_mcgrps[] = {
{ .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
};
static struct genl_family team_nl_family __ro_after_init = {
.name = TEAM_GENL_NAME,
.version = TEAM_GENL_VERSION,
.maxattr = TEAM_ATTR_MAX,
.policy = team_nl_policy,
.netnsok = true,
.module = THIS_MODULE,
.small_ops = team_nl_ops,
.n_small_ops = ARRAY_SIZE(team_nl_ops),
.resv_start_op = TEAM_CMD_PORT_LIST_GET + 1,
.mcgrps = team_nl_mcgrps,
.n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
};
static int team_nl_send_multicast(struct sk_buff *skb,
struct team *team, u32 portid)
{
return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
skb, 0, 0, GFP_KERNEL);
}
static int team_nl_send_event_options_get(struct team *team,
struct list_head *sel_opt_inst_list)
{
return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
sel_opt_inst_list);
}
static int team_nl_send_event_port_get(struct team *team,
struct team_port *port)
{
return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
port);
}
static int __init team_nl_init(void)
{
return genl_register_family(&team_nl_family);
}
static void team_nl_fini(void)
{
genl_unregister_family(&team_nl_family);
}
/******************
* Change checkers
******************/
static void __team_options_change_check(struct team *team)
{
int err;
struct team_option_inst *opt_inst;
LIST_HEAD(sel_opt_inst_list);
list_for_each_entry(opt_inst, &team->option_inst_list, list) {
if (opt_inst->changed)
list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
}
err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
if (err && err != -ESRCH)
netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
err);
}
/* rtnl lock is held */
static void __team_port_change_send(struct team_port *port, bool linkup)
{
int err;
port->changed = true;
port->state.linkup = linkup;
team_refresh_port_linkup(port);
if (linkup) {
struct ethtool_link_ksettings ecmd;
err = __ethtool_get_link_ksettings(port->dev, &ecmd);
if (!err) {
port->state.speed = ecmd.base.speed;
port->state.duplex = ecmd.base.duplex;
goto send_event;
}
}
port->state.speed = 0;
port->state.duplex = 0;
send_event:
err = team_nl_send_event_port_get(port->team, port);
if (err && err != -ESRCH)
netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
port->dev->name, err);
}
static void __team_carrier_check(struct team *team)
{
struct team_port *port;
bool team_linkup;
if (team->user_carrier_enabled)
return;
team_linkup = false;
list_for_each_entry(port, &team->port_list, list) {
if (port->linkup) {
team_linkup = true;
break;
}
}
if (team_linkup)
netif_carrier_on(team->dev);
else
netif_carrier_off(team->dev);
}
static void __team_port_change_check(struct team_port *port, bool linkup)
{
if (port->state.linkup != linkup)
__team_port_change_send(port, linkup);
__team_carrier_check(port->team);
}
static void __team_port_change_port_added(struct team_port *port, bool linkup)
{
__team_port_change_send(port, linkup);
__team_carrier_check(port->team);
}
static void __team_port_change_port_removed(struct team_port *port)
{
port->removed = true;
__team_port_change_send(port, false);
__team_carrier_check(port->team);
}
static void team_port_change_check(struct team_port *port, bool linkup)
{
struct team *team = port->team;
mutex_lock(&team->lock);
__team_port_change_check(port, linkup);
mutex_unlock(&team->lock);
}
/************************************
* Net device notifier event handler
************************************/
static int team_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct team_port *port;
port = team_port_get_rtnl(dev);
if (!port)
return NOTIFY_DONE;
switch (event) {
case NETDEV_UP:
if (netif_oper_up(dev))
team_port_change_check(port, true);
break;
case NETDEV_DOWN:
team_port_change_check(port, false);
break;
case NETDEV_CHANGE:
if (netif_running(port->dev))
team_port_change_check(port,
!!netif_oper_up(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_PRECHANGEMTU:
/* Forbid to change mtu of underlaying device */
if (!port->team->port_mtu_change_allowed)
return NOTIFY_BAD;
break;
case NETDEV_PRE_TYPE_CHANGE:
/* Forbid to change type of underlaying device */
return NOTIFY_BAD;
case NETDEV_RESEND_IGMP:
/* Propagate to master device */
call_netdevice_notifiers(event, port->team->dev);
break;
}
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);
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