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bonding: implement xdo_dev_state_free and call it after deletion

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[ Upstream commit ec13009472 ]

Add this implementation for bonding, so hardware resources can be
freed from the active slave after xfrm state is deleted. The netdev
used to invoke xdo_dev_state_free callback, is saved in the xfrm state
(xs->xso.real_dev), which is also the bond's active slave. To prevent
it from being freed, acquire netdev reference before leaving RCU
read-side critical section, and release it after callback is done.

And call it when deleting all SAs from old active real interface while
switching current active slave.

Fixes: 9a5605505d ("bonding: Add struct bond_ipesc to manage SA")
Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Jay Vosburgh <jv@jvosburgh.net>
Link: https://patch.msgid.link/20240823031056.110999-2-jianbol@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jianbo Liu 2024-08-23 06:10:54 +03:00 committed by Greg Kroah-Hartman
parent 7aa9f978c2
commit 124a688ed3
1 changed files with 36 additions and 0 deletions
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36
drivers/net/bonding/bond_main.c
View File

@ -581,12 +581,47 @@ static void bond_ipsec_del_sa_all(struct bonding *bond)
__func__);
} else {
slave->dev->xfrmdev_ops->xdo_dev_state_delete(ipsec->xs);
if (slave->dev->xfrmdev_ops->xdo_dev_state_free)
slave->dev->xfrmdev_ops->xdo_dev_state_free(ipsec->xs);
}
}
spin_unlock_bh(&bond->ipsec_lock);
rcu_read_unlock();
}
static void bond_ipsec_free_sa(struct xfrm_state *xs)
{
struct net_device *bond_dev = xs->xso.dev;
struct net_device *real_dev;
netdevice_tracker tracker;
struct bonding *bond;
struct slave *slave;
if (!bond_dev)
return;
rcu_read_lock();
bond = netdev_priv(bond_dev);
slave = rcu_dereference(bond->curr_active_slave);
real_dev = slave ? slave->dev : NULL;
netdev_hold(real_dev, &tracker, GFP_ATOMIC);
rcu_read_unlock();
if (!slave)
goto out;
if (!xs->xso.real_dev)
goto out;
WARN_ON(xs->xso.real_dev != real_dev);
if (real_dev && real_dev->xfrmdev_ops &&
real_dev->xfrmdev_ops->xdo_dev_state_free)
real_dev->xfrmdev_ops->xdo_dev_state_free(xs);
out:
netdev_put(real_dev, &tracker);
}
/**
* bond_ipsec_offload_ok - can this packet use the xfrm hw offload
* @skb: current data packet
@ -627,6 +662,7 @@ out:
static const struct xfrmdev_ops bond_xfrmdev_ops = {
.xdo_dev_state_add = bond_ipsec_add_sa,
.xdo_dev_state_delete = bond_ipsec_del_sa,
.xdo_dev_state_free = bond_ipsec_free_sa,
.xdo_dev_offload_ok = bond_ipsec_offload_ok,
};
#endif /* CONFIG_XFRM_OFFLOAD */