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Date: Sun, 26 Jan 2020 15:21:26 +0200
From: Maor Gottlieb <maorg@...lanox.com>
To: j.vosburgh@...il.com, vfalico@...il.com, andy@...yhouse.net,
jiri@...lanox.com, davem@...emloft.net
Cc: Maor Gottlieb <maorg@...lanox.com>, netdev@...r.kernel.org,
saeedm@...lanox.com, jgg@...lanox.com, leonro@...lanox.com,
alexr@...lanox.com, markz@...lanox.com, parav@...lanox.com,
eranbe@...lanox.com, linux-rdma@...r.kernel.org
Subject: [RFC PATCH 4/4] bonding: Implement ndo_xmit_slave_get
Add implementation of ndo_xmit_slave_get.
When user set the LAG_FLAGS_HASH_ALL_SLAVES bit and the xmit slave
result is based on the hash, then the slave will be selected from the
array of all the slaves.
Signed-off-by: Maor Gottlieb <maorg@...lanox.com>
---
drivers/net/bonding/bond_main.c | 63 ++++++++++++++++++++++++++++++---
include/net/bonding.h | 1 +
2 files changed, 60 insertions(+), 4 deletions(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index adab1e3549ff..c8f440d1b624 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -4098,7 +4098,8 @@ static void bond_skip_slave(struct bond_up_slave *slaves,
*/
int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
{
- struct bond_up_slave *active_slaves, *old_active_slaves;
+ struct bond_up_slave *active_slaves = NULL, *all_slaves = NULL;
+ struct bond_up_slave *old_active_slaves, *old_all_slaves;
struct slave *slave;
struct list_head *iter;
int agg_id = 0;
@@ -4110,7 +4111,9 @@ int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
active_slaves = kzalloc(struct_size(active_slaves, arr,
bond->slave_cnt), GFP_KERNEL);
- if (!active_slaves) {
+ all_slaves = kzalloc(struct_size(all_slaves, arr,
+ bond->slave_cnt), GFP_KERNEL);
+ if (!active_slaves || !all_slaves) {
ret = -ENOMEM;
pr_err("Failed to build slave-array.\n");
goto out;
@@ -4141,14 +4144,17 @@ int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
if (!agg || agg->aggregator_identifier != agg_id)
continue;
}
- if (!bond_slave_can_tx(slave))
+ if (!bond_slave_can_tx(slave)) {
+ all_slaves->arr[all_slaves->count++] = slave;
continue;
+ }
if (skipslave == slave)
continue;
slave_dbg(bond->dev, slave->dev, "Adding slave to tx hash array[%d]\n",
active_slaves->count);
+ all_slaves->arr[all_slaves->count++] = slave;
active_slaves->arr[active_slaves->count++] = slave;
}
@@ -4156,10 +4162,18 @@ int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
rcu_assign_pointer(bond->active_slaves, active_slaves);
if (old_active_slaves)
kfree_rcu(old_active_slaves, rcu);
+
+ old_all_slaves = rtnl_dereference(bond->all_slaves);
+ rcu_assign_pointer(bond->all_slaves, all_slaves);
+ if (old_all_slaves)
+ kfree_rcu(old_all_slaves, rcu);
out:
- if (ret != 0 && skipslave)
+ if (ret != 0 && skipslave) {
bond_skip_slave(rtnl_dereference(bond->active_slaves),
skipslave);
+ kfree(all_slaves);
+ kfree(active_slaves);
+ }
return ret;
}
@@ -4265,6 +4279,46 @@ static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb,
return txq;
}
+static struct net_device *bond_xmit_slave_get(struct net_device *master_dev,
+ struct sk_buff *skb,
+ int flags)
+{
+ struct bonding *bond = netdev_priv(master_dev);
+ struct bond_up_slave *slaves;
+ struct slave *slave;
+
+ switch (BOND_MODE(bond)) {
+ case BOND_MODE_ROUNDROBIN:
+ slave = bond_xmit_roundrobin_slave_get(bond, skb);
+ break;
+ case BOND_MODE_ACTIVEBACKUP:
+ slave = bond_xmit_activebackup_slave_get(bond, skb);
+ break;
+ case BOND_MODE_8023AD:
+ case BOND_MODE_XOR:
+ if (flags & LAG_FLAGS_HASH_ALL_SLAVES)
+ slaves = rcu_dereference(bond->all_slaves);
+ else
+ slaves = rcu_dereference(bond->active_slaves);
+ slave = bond_xmit_3ad_xor_slave_get(bond, skb, slaves);
+ break;
+ case BOND_MODE_BROADCAST:
+ return ERR_PTR(-EOPNOTSUPP);
+ case BOND_MODE_ALB:
+ slave = bond_xmit_alb_slave_get(bond, skb);
+ break;
+ case BOND_MODE_TLB:
+ slave = bond_xmit_tlb_slave_get(bond, skb);
+ break;
+ default:
+ return NULL;
+ }
+
+ if (slave)
+ return slave->dev;
+ return NULL;
+}
+
static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct bonding *bond = netdev_priv(dev);
@@ -4387,6 +4441,7 @@ static const struct net_device_ops bond_netdev_ops = {
.ndo_del_slave = bond_release,
.ndo_fix_features = bond_fix_features,
.ndo_features_check = passthru_features_check,
+ .ndo_xmit_slave_get = bond_xmit_slave_get,
};
static const struct device_type bond_type = {
diff --git a/include/net/bonding.h b/include/net/bonding.h
index b77daffc1b52..6dd970eb9d3f 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -201,6 +201,7 @@ struct bonding {
struct slave __rcu *current_arp_slave;
struct slave __rcu *primary_slave;
struct bond_up_slave __rcu *active_slaves; /* Array of usable slaves */
+ struct bond_up_slave __rcu *all_slaves; /* Array of all slaves */
bool force_primary;
s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
int (*recv_probe)(const struct sk_buff *, struct bonding *,
--
2.17.2
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