mirror of
https://github.com/torvalds/linux
synced 2024-10-02 17:30:32 +00:00
nfp: flower: fix for take a mutex lock in soft irq context and rcu lock
The neighbour event callback call the function nfp_tun_write_neigh,
this function will take a mutex lock and it is in soft irq context,
change the work queue to process the neighbour event.
Move the nfp_tun_write_neigh function out of range rcu_read_lock/unlock()
in function nfp_tunnel_request_route_v4 and nfp_tunnel_request_route_v6.
Fixes: abc210952a ("nfp: flower: tunnel neigh support bond offload")
CC: stable@vger.kernel.org # 6.2+
Signed-off-by: Hui Zhou <hui.zhou@corigine.com>
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hui Zhou
David S. Miller
parent
803a809d3d
commit
0ad722bd9e
|
|
@ -160,6 +160,18 @@ struct nfp_tun_mac_addr_offload {
|
|||
u8 addr[ETH_ALEN];
|
||||
};
|
||||
|
||||
/**
|
||||
* struct nfp_neigh_update_work - update neighbour information to nfp
|
||||
* @work: Work queue for writing neigh to the nfp
|
||||
* @n: neighbour entry
|
||||
* @app: Back pointer to app
|
||||
*/
|
||||
struct nfp_neigh_update_work {
|
||||
struct work_struct work;
|
||||
struct neighbour *n;
|
||||
struct nfp_app *app;
|
||||
};
|
||||
|
||||
enum nfp_flower_mac_offload_cmd {
|
||||
NFP_TUNNEL_MAC_OFFLOAD_ADD = 0,
|
||||
NFP_TUNNEL_MAC_OFFLOAD_DEL = 1,
|
||||
|
|
@ -607,38 +619,30 @@ nfp_tun_write_neigh(struct net_device *netdev, struct nfp_app *app,
|
|||
nfp_flower_cmsg_warn(app, "Neighbour configuration failed.\n");
|
||||
}
|
||||
|
||||
static int
|
||||
nfp_tun_neigh_event_handler(struct notifier_block *nb, unsigned long event,
|
||||
void *ptr)
|
||||
static void
|
||||
nfp_tun_release_neigh_update_work(struct nfp_neigh_update_work *update_work)
|
||||
{
|
||||
struct nfp_flower_priv *app_priv;
|
||||
struct netevent_redirect *redir;
|
||||
struct neighbour *n;
|
||||
neigh_release(update_work->n);
|
||||
kfree(update_work);
|
||||
}
|
||||
|
||||
static void nfp_tun_neigh_update(struct work_struct *work)
|
||||
{
|
||||
struct nfp_neigh_update_work *update_work;
|
||||
struct nfp_app *app;
|
||||
struct neighbour *n;
|
||||
bool neigh_invalid;
|
||||
int err;
|
||||
|
||||
switch (event) {
|
||||
case NETEVENT_REDIRECT:
|
||||
redir = (struct netevent_redirect *)ptr;
|
||||
n = redir->neigh;
|
||||
break;
|
||||
case NETEVENT_NEIGH_UPDATE:
|
||||
n = (struct neighbour *)ptr;
|
||||
break;
|
||||
default:
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
|
||||
neigh_invalid = !(n->nud_state & NUD_VALID) || n->dead;
|
||||
|
||||
app_priv = container_of(nb, struct nfp_flower_priv, tun.neigh_nb);
|
||||
app = app_priv->app;
|
||||
update_work = container_of(work, struct nfp_neigh_update_work, work);
|
||||
app = update_work->app;
|
||||
n = update_work->n;
|
||||
|
||||
if (!nfp_flower_get_port_id_from_netdev(app, n->dev))
|
||||
return NOTIFY_DONE;
|
||||
goto out;
|
||||
|
||||
#if IS_ENABLED(CONFIG_INET)
|
||||
neigh_invalid = !(n->nud_state & NUD_VALID) || n->dead;
|
||||
if (n->tbl->family == AF_INET6) {
|
||||
#if IS_ENABLED(CONFIG_IPV6)
|
||||
struct flowi6 flow6 = {};
|
||||
|
|
@ -655,13 +659,11 @@ nfp_tun_neigh_event_handler(struct notifier_block *nb, unsigned long event,
|
|||
dst = ip6_dst_lookup_flow(dev_net(n->dev), NULL,
|
||||
&flow6, NULL);
|
||||
if (IS_ERR(dst))
|
||||
return NOTIFY_DONE;
|
||||
goto out;
|
||||
|
||||
dst_release(dst);
|
||||
}
|
||||
nfp_tun_write_neigh(n->dev, app, &flow6, n, true, false);
|
||||
#else
|
||||
return NOTIFY_DONE;
|
||||
#endif /* CONFIG_IPV6 */
|
||||
} else {
|
||||
struct flowi4 flow4 = {};
|
||||
|
|
@ -678,17 +680,71 @@ nfp_tun_neigh_event_handler(struct notifier_block *nb, unsigned long event,
|
|||
rt = ip_route_output_key(dev_net(n->dev), &flow4);
|
||||
err = PTR_ERR_OR_ZERO(rt);
|
||||
if (err)
|
||||
return NOTIFY_DONE;
|
||||
goto out;
|
||||
|
||||
ip_rt_put(rt);
|
||||
}
|
||||
nfp_tun_write_neigh(n->dev, app, &flow4, n, false, false);
|
||||
}
|
||||
#else
|
||||
return NOTIFY_DONE;
|
||||
#endif /* CONFIG_INET */
|
||||
out:
|
||||
nfp_tun_release_neigh_update_work(update_work);
|
||||
}
|
||||
|
||||
return NOTIFY_OK;
|
||||
static struct nfp_neigh_update_work *
|
||||
nfp_tun_alloc_neigh_update_work(struct nfp_app *app, struct neighbour *n)
|
||||
{
|
||||
struct nfp_neigh_update_work *update_work;
|
||||
|
||||
update_work = kzalloc(sizeof(*update_work), GFP_ATOMIC);
|
||||
if (!update_work)
|
||||
return NULL;
|
||||
|
||||
INIT_WORK(&update_work->work, nfp_tun_neigh_update);
|
||||
neigh_hold(n);
|
||||
update_work->n = n;
|
||||
update_work->app = app;
|
||||
|
||||
return update_work;
|
||||
}
|
||||
|
||||
static int
|
||||
nfp_tun_neigh_event_handler(struct notifier_block *nb, unsigned long event,
|
||||
void *ptr)
|
||||
{
|
||||
struct nfp_neigh_update_work *update_work;
|
||||
struct nfp_flower_priv *app_priv;
|
||||
struct netevent_redirect *redir;
|
||||
struct neighbour *n;
|
||||
struct nfp_app *app;
|
||||
|
||||
switch (event) {
|
||||
case NETEVENT_REDIRECT:
|
||||
redir = (struct netevent_redirect *)ptr;
|
||||
n = redir->neigh;
|
||||
break;
|
||||
case NETEVENT_NEIGH_UPDATE:
|
||||
n = (struct neighbour *)ptr;
|
||||
break;
|
||||
default:
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
#if IS_ENABLED(CONFIG_IPV6)
|
||||
if (n->tbl != ipv6_stub->nd_tbl && n->tbl != &arp_tbl)
|
||||
#else
|
||||
if (n->tbl != &arp_tbl)
|
||||
#endif
|
||||
return NOTIFY_DONE;
|
||||
|
||||
app_priv = container_of(nb, struct nfp_flower_priv, tun.neigh_nb);
|
||||
app = app_priv->app;
|
||||
update_work = nfp_tun_alloc_neigh_update_work(app, n);
|
||||
if (!update_work)
|
||||
return NOTIFY_DONE;
|
||||
|
||||
queue_work(system_highpri_wq, &update_work->work);
|
||||
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
|
||||
void nfp_tunnel_request_route_v4(struct nfp_app *app, struct sk_buff *skb)
|
||||
|
|
@ -706,6 +762,7 @@ void nfp_tunnel_request_route_v4(struct nfp_app *app, struct sk_buff *skb)
|
|||
netdev = nfp_app_dev_get(app, be32_to_cpu(payload->ingress_port), NULL);
|
||||
if (!netdev)
|
||||
goto fail_rcu_unlock;
|
||||
dev_hold(netdev);
|
||||
|
||||
flow.daddr = payload->ipv4_addr;
|
||||
flow.flowi4_proto = IPPROTO_UDP;
|
||||
|
|
@ -725,13 +782,16 @@ void nfp_tunnel_request_route_v4(struct nfp_app *app, struct sk_buff *skb)
|
|||
ip_rt_put(rt);
|
||||
if (!n)
|
||||
goto fail_rcu_unlock;
|
||||
rcu_read_unlock();
|
||||
|
||||
nfp_tun_write_neigh(n->dev, app, &flow, n, false, true);
|
||||
neigh_release(n);
|
||||
rcu_read_unlock();
|
||||
dev_put(netdev);
|
||||
return;
|
||||
|
||||
fail_rcu_unlock:
|
||||
rcu_read_unlock();
|
||||
dev_put(netdev);
|
||||
nfp_flower_cmsg_warn(app, "Requested route not found.\n");
|
||||
}
|
||||
|
||||
|
|
@ -749,6 +809,7 @@ void nfp_tunnel_request_route_v6(struct nfp_app *app, struct sk_buff *skb)
|
|||
netdev = nfp_app_dev_get(app, be32_to_cpu(payload->ingress_port), NULL);
|
||||
if (!netdev)
|
||||
goto fail_rcu_unlock;
|
||||
dev_hold(netdev);
|
||||
|
||||
flow.daddr = payload->ipv6_addr;
|
||||
flow.flowi6_proto = IPPROTO_UDP;
|
||||
|
|
@ -766,14 +827,16 @@ void nfp_tunnel_request_route_v6(struct nfp_app *app, struct sk_buff *skb)
|
|||
dst_release(dst);
|
||||
if (!n)
|
||||
goto fail_rcu_unlock;
|
||||
rcu_read_unlock();
|
||||
|
||||
nfp_tun_write_neigh(n->dev, app, &flow, n, true, true);
|
||||
neigh_release(n);
|
||||
rcu_read_unlock();
|
||||
dev_put(netdev);
|
||||
return;
|
||||
|
||||
fail_rcu_unlock:
|
||||
rcu_read_unlock();
|
||||
dev_put(netdev);
|
||||
nfp_flower_cmsg_warn(app, "Requested IPv6 route not found.\n");
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue