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authorEric Dumazet <edumazet@google.com>2021-11-23 14:56:08 -0800
committerJakub Kicinski <kuba@kernel.org>2021-11-24 17:21:42 -0800
commit627b94f75b82d13d1530b59155a545fd99d807db (patch)
tree6b0cc9cd576b1c9355b9f1fdf0ab7f3d4ab44e7c /net
parentfc1ca3348a74a1afaa7ffebc2b2f2cc149e11278 (diff)
gro: remove rcu_read_lock/rcu_read_unlock from gro_complete handlers
All gro_complete() handlers are called from napi_gro_complete() while rcu_read_lock() has been called. There is no point stacking more rcu_read_lock() Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
-rw-r--r--net/8021q/vlan_core.c2
-rw-r--r--net/ethernet/eth.c2
-rw-r--r--net/ipv4/af_inet.c7
-rw-r--r--net/ipv4/fou.c13
-rw-r--r--net/ipv4/gre_offload.c3
-rw-r--r--net/ipv4/udp_offload.c2
-rw-r--r--net/ipv6/ip6_offload.c8
7 files changed, 8 insertions, 29 deletions
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 534eebb5a2e6..acf8c791f320 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -513,14 +513,12 @@ static int vlan_gro_complete(struct sk_buff *skb, int nhoff)
struct packet_offload *ptype;
int err = -ENOENT;
- rcu_read_lock();
ptype = gro_find_complete_by_type(type);
if (ptype)
err = INDIRECT_CALL_INET(ptype->callbacks.gro_complete,
ipv6_gro_complete, inet_gro_complete,
skb, nhoff + sizeof(*vhdr));
- rcu_read_unlock();
return err;
}
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index d4fa2f152efc..ebcc812735a4 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -466,14 +466,12 @@ int eth_gro_complete(struct sk_buff *skb, int nhoff)
if (skb->encapsulation)
skb_set_inner_mac_header(skb, nhoff);
- rcu_read_lock();
ptype = gro_find_complete_by_type(type);
if (ptype != NULL)
err = INDIRECT_CALL_INET(ptype->callbacks.gro_complete,
ipv6_gro_complete, inet_gro_complete,
skb, nhoff + sizeof(*eh));
- rcu_read_unlock();
return err;
}
EXPORT_SYMBOL(eth_gro_complete);
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index de7d3a6748f5..04067b249bf3 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1612,10 +1612,9 @@ int inet_gro_complete(struct sk_buff *skb, int nhoff)
csum_replace2(&iph->check, iph->tot_len, newlen);
iph->tot_len = newlen;
- rcu_read_lock();
ops = rcu_dereference(inet_offloads[proto]);
if (WARN_ON(!ops || !ops->callbacks.gro_complete))
- goto out_unlock;
+ goto out;
/* Only need to add sizeof(*iph) to get to the next hdr below
* because any hdr with option will have been flushed in
@@ -1625,9 +1624,7 @@ int inet_gro_complete(struct sk_buff *skb, int nhoff)
tcp4_gro_complete, udp4_gro_complete,
skb, nhoff + sizeof(*iph));
-out_unlock:
- rcu_read_unlock();
-
+out:
return err;
}
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c
index 6ebc345e6001..0d085cc8d96c 100644
--- a/net/ipv4/fou.c
+++ b/net/ipv4/fou.c
@@ -266,19 +266,16 @@ static int fou_gro_complete(struct sock *sk, struct sk_buff *skb,
const struct net_offload *ops;
int err = -ENOSYS;
- rcu_read_lock();
offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
ops = rcu_dereference(offloads[proto]);
if (WARN_ON(!ops || !ops->callbacks.gro_complete))
- goto out_unlock;
+ goto out;
err = ops->callbacks.gro_complete(skb, nhoff);
skb_set_inner_mac_header(skb, nhoff);
-out_unlock:
- rcu_read_unlock();
-
+out:
return err;
}
@@ -480,18 +477,16 @@ static int gue_gro_complete(struct sock *sk, struct sk_buff *skb, int nhoff)
return err;
}
- rcu_read_lock();
offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
ops = rcu_dereference(offloads[proto]);
if (WARN_ON(!ops || !ops->callbacks.gro_complete))
- goto out_unlock;
+ goto out;
err = ops->callbacks.gro_complete(skb, nhoff + guehlen);
skb_set_inner_mac_header(skb, nhoff + guehlen);
-out_unlock:
- rcu_read_unlock();
+out:
return err;
}
diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c
index c6b5d327e3e1..07073fa35205 100644
--- a/net/ipv4/gre_offload.c
+++ b/net/ipv4/gre_offload.c
@@ -253,13 +253,10 @@ static int gre_gro_complete(struct sk_buff *skb, int nhoff)
if (greh->flags & GRE_CSUM)
grehlen += GRE_HEADER_SECTION;
- rcu_read_lock();
ptype = gro_find_complete_by_type(type);
if (ptype)
err = ptype->callbacks.gro_complete(skb, nhoff + grehlen);
- rcu_read_unlock();
-
skb_set_inner_mac_header(skb, nhoff + grehlen);
return err;
diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c
index 3be5c083879d..6d1a4bec2614 100644
--- a/net/ipv4/udp_offload.c
+++ b/net/ipv4/udp_offload.c
@@ -667,7 +667,6 @@ int udp_gro_complete(struct sk_buff *skb, int nhoff,
uh->len = newlen;
- rcu_read_lock();
sk = INDIRECT_CALL_INET(lookup, udp6_lib_lookup_skb,
udp4_lib_lookup_skb, skb, uh->source, uh->dest);
if (sk && udp_sk(sk)->gro_complete) {
@@ -688,7 +687,6 @@ int udp_gro_complete(struct sk_buff *skb, int nhoff,
} else {
err = udp_gro_complete_segment(skb);
}
- rcu_read_unlock();
if (skb->remcsum_offload)
skb_shinfo(skb)->gso_type |= SKB_GSO_TUNNEL_REMCSUM;
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index 67b9ba5e159c..48674888f2dc 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -327,18 +327,14 @@ INDIRECT_CALLABLE_SCOPE int ipv6_gro_complete(struct sk_buff *skb, int nhoff)
iph->payload_len = htons(skb->len - nhoff - sizeof(*iph));
- rcu_read_lock();
-
nhoff += sizeof(*iph) + ipv6_exthdrs_len(iph, &ops);
if (WARN_ON(!ops || !ops->callbacks.gro_complete))
- goto out_unlock;
+ goto out;
err = INDIRECT_CALL_L4(ops->callbacks.gro_complete, tcp6_gro_complete,
udp6_gro_complete, skb, nhoff);
-out_unlock:
- rcu_read_unlock();
-
+out:
return err;
}