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Merge branch 'fixes-for-ipsec-over-bonding'

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Jianbo Liu says:

====================
Fixes for IPsec over bonding

This patchset provides bug fixes for IPsec over bonding driver.

It adds the missing xdo_dev_state_free API, and fixes "scheduling while
atomic" by using mutex lock instead.

Series generated against:
commit c07ff8592d57 ("netem: fix return value if duplicate enqueue fails")
====================

Link: https://patch.msgid.link/20240823031056.110999-1-jianbol@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2024-08-27 13:11:39 -07:00
commit 2fecbf75c4
2 changed files with 106 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

159
drivers/net/bonding/bond_main.c
View File

@ -427,6 +427,8 @@ static int bond_ipsec_add_sa(struct xfrm_state *xs,
struct netlink_ext_ack *extack)
{
struct net_device *bond_dev = xs->xso.dev;
struct net_device *real_dev;
netdevice_tracker tracker;
struct bond_ipsec *ipsec;
struct bonding *bond;
struct slave *slave;
@ -438,74 +440,80 @@ static int bond_ipsec_add_sa(struct xfrm_state *xs,
rcu_read_lock();
bond = netdev_priv(bond_dev);
slave = rcu_dereference(bond->curr_active_slave);
if (!slave) {
rcu_read_unlock();
return -ENODEV;
real_dev = slave ? slave->dev : NULL;
netdev_hold(real_dev, &tracker, GFP_ATOMIC);
rcu_read_unlock();
if (!real_dev) {
err = -ENODEV;
goto out;
}
if (!slave->dev->xfrmdev_ops ||
!slave->dev->xfrmdev_ops->xdo_dev_state_add ||
netif_is_bond_master(slave->dev)) {
if (!real_dev->xfrmdev_ops ||
!real_dev->xfrmdev_ops->xdo_dev_state_add ||
netif_is_bond_master(real_dev)) {
NL_SET_ERR_MSG_MOD(extack, "Slave does not support ipsec offload");
rcu_read_unlock();
return -EINVAL;
err = -EINVAL;
goto out;
}
ipsec = kmalloc(sizeof(*ipsec), GFP_ATOMIC);
ipsec = kmalloc(sizeof(*ipsec), GFP_KERNEL);
if (!ipsec) {
rcu_read_unlock();
return -ENOMEM;
err = -ENOMEM;
goto out;
}
xs->xso.real_dev = slave->dev;
err = slave->dev->xfrmdev_ops->xdo_dev_state_add(xs, extack);
xs->xso.real_dev = real_dev;
err = real_dev->xfrmdev_ops->xdo_dev_state_add(xs, extack);
if (!err) {
ipsec->xs = xs;
INIT_LIST_HEAD(&ipsec->list);
spin_lock_bh(&bond->ipsec_lock);
mutex_lock(&bond->ipsec_lock);
list_add(&ipsec->list, &bond->ipsec_list);
spin_unlock_bh(&bond->ipsec_lock);
mutex_unlock(&bond->ipsec_lock);
} else {
kfree(ipsec);
}
rcu_read_unlock();
out:
netdev_put(real_dev, &tracker);
return err;
}
static void bond_ipsec_add_sa_all(struct bonding *bond)
{
struct net_device *bond_dev = bond->dev;
struct net_device *real_dev;
struct bond_ipsec *ipsec;
struct slave *slave;
rcu_read_lock();
slave = rcu_dereference(bond->curr_active_slave);
if (!slave)
goto out;
slave = rtnl_dereference(bond->curr_active_slave);
real_dev = slave ? slave->dev : NULL;
if (!real_dev)
return;
if (!slave->dev->xfrmdev_ops ||
!slave->dev->xfrmdev_ops->xdo_dev_state_add ||
netif_is_bond_master(slave->dev)) {
spin_lock_bh(&bond->ipsec_lock);
mutex_lock(&bond->ipsec_lock);
if (!real_dev->xfrmdev_ops ||
!real_dev->xfrmdev_ops->xdo_dev_state_add ||
netif_is_bond_master(real_dev)) {
if (!list_empty(&bond->ipsec_list))
slave_warn(bond_dev, slave->dev,
slave_warn(bond_dev, real_dev,
"%s: no slave xdo_dev_state_add\n",
__func__);
spin_unlock_bh(&bond->ipsec_lock);
goto out;
}
spin_lock_bh(&bond->ipsec_lock);
list_for_each_entry(ipsec, &bond->ipsec_list, list) {
ipsec->xs->xso.real_dev = slave->dev;
if (slave->dev->xfrmdev_ops->xdo_dev_state_add(ipsec->xs, NULL)) {
slave_warn(bond_dev, slave->dev, "%s: failed to add SA\n", __func__);
/* If new state is added before ipsec_lock acquired */
if (ipsec->xs->xso.real_dev == real_dev)
continue;
ipsec->xs->xso.real_dev = real_dev;
if (real_dev->xfrmdev_ops->xdo_dev_state_add(ipsec->xs, NULL)) {
slave_warn(bond_dev, real_dev, "%s: failed to add SA\n", __func__);
ipsec->xs->xso.real_dev = NULL;
}
}
spin_unlock_bh(&bond->ipsec_lock);
out:
rcu_read_unlock();
mutex_unlock(&bond->ipsec_lock);
}
/**
@ -515,6 +523,8 @@ static void bond_ipsec_add_sa_all(struct bonding *bond)
static void bond_ipsec_del_sa(struct xfrm_state *xs)
{
struct net_device *bond_dev = xs->xso.dev;
struct net_device *real_dev;
netdevice_tracker tracker;
struct bond_ipsec *ipsec;
struct bonding *bond;
struct slave *slave;
@ -525,6 +535,9 @@ static void bond_ipsec_del_sa(struct xfrm_state *xs)
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;
@ -532,18 +545,19 @@ static void bond_ipsec_del_sa(struct xfrm_state *xs)
if (!xs->xso.real_dev)
goto out;
WARN_ON(xs->xso.real_dev != slave->dev);
WARN_ON(xs->xso.real_dev != real_dev);
if (!slave->dev->xfrmdev_ops ||
!slave->dev->xfrmdev_ops->xdo_dev_state_delete ||
netif_is_bond_master(slave->dev)) {
slave_warn(bond_dev, slave->dev, "%s: no slave xdo_dev_state_delete\n", __func__);
if (!real_dev->xfrmdev_ops ||
!real_dev->xfrmdev_ops->xdo_dev_state_delete ||
netif_is_bond_master(real_dev)) {
slave_warn(bond_dev, real_dev, "%s: no slave xdo_dev_state_delete\n", __func__);
goto out;
}
slave->dev->xfrmdev_ops->xdo_dev_state_delete(xs);
real_dev->xfrmdev_ops->xdo_dev_state_delete(xs);
out:
spin_lock_bh(&bond->ipsec_lock);
netdev_put(real_dev, &tracker);
mutex_lock(&bond->ipsec_lock);
list_for_each_entry(ipsec, &bond->ipsec_list, list) {
if (ipsec->xs == xs) {
list_del(&ipsec->list);
@ -551,40 +565,72 @@ static void bond_ipsec_del_sa(struct xfrm_state *xs)
break;
}
}
spin_unlock_bh(&bond->ipsec_lock);
rcu_read_unlock();
mutex_unlock(&bond->ipsec_lock);
}
static void bond_ipsec_del_sa_all(struct bonding *bond)
{
struct net_device *bond_dev = bond->dev;
struct net_device *real_dev;
struct bond_ipsec *ipsec;
struct slave *slave;
rcu_read_lock();
slave = rcu_dereference(bond->curr_active_slave);
if (!slave) {
rcu_read_unlock();
slave = rtnl_dereference(bond->curr_active_slave);
real_dev = slave ? slave->dev : NULL;
if (!real_dev)
return;
}
spin_lock_bh(&bond->ipsec_lock);
mutex_lock(&bond->ipsec_lock);
list_for_each_entry(ipsec, &bond->ipsec_list, list) {
if (!ipsec->xs->xso.real_dev)
continue;
if (!slave->dev->xfrmdev_ops ||
!slave->dev->xfrmdev_ops->xdo_dev_state_delete ||
netif_is_bond_master(slave->dev)) {
slave_warn(bond_dev, slave->dev,
if (!real_dev->xfrmdev_ops ||
!real_dev->xfrmdev_ops->xdo_dev_state_delete ||
netif_is_bond_master(real_dev)) {
slave_warn(bond_dev, real_dev,
"%s: no slave xdo_dev_state_delete\n",
__func__);
} else {
slave->dev->xfrmdev_ops->xdo_dev_state_delete(ipsec->xs);
real_dev->xfrmdev_ops->xdo_dev_state_delete(ipsec->xs);
if (real_dev->xfrmdev_ops->xdo_dev_state_free)
real_dev->xfrmdev_ops->xdo_dev_state_free(ipsec->xs);
}
}
spin_unlock_bh(&bond->ipsec_lock);
mutex_unlock(&bond->ipsec_lock);
}
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);
}
/**
@ -627,6 +673,7 @@ static bool bond_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)
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 */
@ -5877,7 +5924,7 @@ void bond_setup(struct net_device *bond_dev)
/* set up xfrm device ops (only supported in active-backup right now) */
bond_dev->xfrmdev_ops = &bond_xfrmdev_ops;
INIT_LIST_HEAD(&bond->ipsec_list);
spin_lock_init(&bond->ipsec_lock);
mutex_init(&bond->ipsec_lock);
#endif /* CONFIG_XFRM_OFFLOAD */
/* don't acquire bond device's netif_tx_lock when transmitting */
@ -5926,6 +5973,10 @@ static void bond_uninit(struct net_device *bond_dev)
__bond_release_one(bond_dev, slave->dev, true, true);
netdev_info(bond_dev, "Released all slaves\n");
#ifdef CONFIG_XFRM_OFFLOAD
mutex_destroy(&bond->ipsec_lock);
#endif /* CONFIG_XFRM_OFFLOAD */
bond_set_slave_arr(bond, NULL, NULL);
list_del_rcu(&bond->bond_list);

2
include/net/bonding.h
View File

@ -260,7 +260,7 @@ struct bonding {
#ifdef CONFIG_XFRM_OFFLOAD
struct list_head ipsec_list;
/* protecting ipsec_list */
spinlock_t ipsec_lock;
struct mutex ipsec_lock;
#endif /* CONFIG_XFRM_OFFLOAD */
struct bpf_prog *xdp_prog;
};