Ksawlii/kernel_samsung_a53x
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Revert "gro: remove rcu_read_lock/rcu_read_unlock from gro_receive handlers"

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This reverts commit c35b04ae63.
This commit is contained in:
Ksawlii 2024-11-24 00:23:41 +01:00
parent db38998ee6
commit e3f85dd1eb
9 changed files with 44 additions and 14 deletions
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5
drivers/net/geneve.c
View file

@ -528,15 +528,18 @@ static struct sk_buff *geneve_gro_receive(struct sock *sk,
type = gh->proto_type;
rcu_read_lock();
ptype = gro_find_receive_by_type(type);
if (!ptype)
goto out;
goto out_unlock;
skb_gro_pull(skb, gh_len);
skb_gro_postpull_rcsum(skb, gh, gh_len);
pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
flush = 0;
out_unlock:
rcu_read_unlock();
out:
skb_gro_flush_final(skb, pp, flush);

5
net/8021q/vlan_core.c
View file

@ -482,9 +482,10 @@ static struct sk_buff *vlan_gro_receive(struct list_head *head,
type = vhdr->h_vlan_encapsulated_proto;
rcu_read_lock();
ptype = gro_find_receive_by_type(type);
if (!ptype)
goto out;
goto out_unlock;
flush = 0;
@ -503,6 +504,8 @@ static struct sk_buff *vlan_gro_receive(struct list_head *head,
skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr));
pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
out_unlock:
rcu_read_unlock();
out:
skb_gro_flush_final(skb, pp, flush);

5
net/ethernet/eth.c
View file

@ -430,16 +430,19 @@ struct sk_buff *eth_gro_receive(struct list_head *head, struct sk_buff *skb)
type = eh->h_proto;
rcu_read_lock();
ptype = gro_find_receive_by_type(type);
if (ptype == NULL) {
flush = 1;
goto out;
goto out_unlock;
}
skb_gro_pull(skb, sizeof(*eh));
skb_gro_postpull_rcsum(skb, eh, sizeof(*eh));
pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
out_unlock:
rcu_read_unlock();
out:
skb_gro_flush_final(skb, pp, flush);

12
net/ipv4/af_inet.c
View file

@ -1473,18 +1473,19 @@ struct sk_buff *inet_gro_receive(struct list_head *head, struct sk_buff *skb)
proto = iph->protocol;
rcu_read_lock();
ops = rcu_dereference(inet_offloads[proto]);
if (!ops || !ops->callbacks.gro_receive)
goto out;
goto out_unlock;
if (*(u8 *)iph != 0x45)
goto out;
goto out_unlock;
if (ip_is_fragment(iph))
goto out;
goto out_unlock;
if (unlikely(ip_fast_csum((u8 *)iph, 5)))
goto out;
goto out_unlock;
id = ntohl(*(__be32 *)&iph->id);
flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id & ~IP_DF));
@ -1561,6 +1562,9 @@ struct sk_buff *inet_gro_receive(struct list_head *head, struct sk_buff *skb)
pp = indirect_call_gro_receive(tcp4_gro_receive, udp4_gro_receive,
ops->callbacks.gro_receive, head, skb);
out_unlock:
rcu_read_unlock();
out:
skb_gro_flush_final(skb, pp, flush);

12
net/ipv4/fou.c
View file

@ -246,14 +246,17 @@ static struct sk_buff *fou_gro_receive(struct sock *sk,
/* Flag this frame as already having an outer encap header */
NAPI_GRO_CB(skb)->is_fou = 1;
rcu_read_lock();
offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
ops = rcu_dereference(offloads[proto]);
if (!ops || !ops->callbacks.gro_receive)
goto out;
goto out_unlock;
pp = call_gro_receive(ops->callbacks.gro_receive, head, skb);
out:
out_unlock:
rcu_read_unlock();
return pp;
}
@ -435,14 +438,17 @@ next_proto:
/* Flag this frame as already having an outer encap header */
NAPI_GRO_CB(skb)->is_fou = 1;
rcu_read_lock();
offloads = NAPI_GRO_CB(skb)->is_ipv6 ? inet6_offloads : inet_offloads;
ops = rcu_dereference(offloads[proto]);
if (WARN_ON_ONCE(!ops || !ops->callbacks.gro_receive))
goto out;
goto out_unlock;
pp = call_gro_receive(ops->callbacks.gro_receive, head, skb);
flush = 0;
out_unlock:
rcu_read_unlock();
out:
skb_gro_flush_final_remcsum(skb, pp, flush, &grc);

9
net/ipv4/gre_offload.c
View file

@ -158,9 +158,10 @@ static struct sk_buff *gre_gro_receive(struct list_head *head,
type = greh->protocol;
rcu_read_lock();
ptype = gro_find_receive_by_type(type);
if (!ptype)
goto out;
goto out_unlock;
grehlen = GRE_HEADER_SECTION;
@ -174,13 +175,13 @@ static struct sk_buff *gre_gro_receive(struct list_head *head,
if (skb_gro_header_hard(skb, hlen)) {
greh = skb_gro_header_slow(skb, hlen, off);
if (unlikely(!greh))
goto out;
goto out_unlock;
}
/* Don't bother verifying checksum if we're going to flush anyway. */
if ((greh->flags & GRE_CSUM) && !NAPI_GRO_CB(skb)->flush) {
if (skb_gro_checksum_simple_validate(skb))
goto out;
goto out_unlock;
skb_gro_checksum_try_convert(skb, IPPROTO_GRE,
null_compute_pseudo);
@ -224,6 +225,8 @@ static struct sk_buff *gre_gro_receive(struct list_head *head,
pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
flush = 0;
out_unlock:
rcu_read_unlock();
out:
skb_gro_flush_final(skb, pp, flush);

2
net/ipv4/udp_offload.c
View file

@ -628,11 +628,13 @@ struct sk_buff *udp4_gro_receive(struct list_head *head, struct sk_buff *skb)
inet_gro_compute_pseudo);
skip:
NAPI_GRO_CB(skb)->is_ipv6 = 0;
rcu_read_lock();
if (static_branch_unlikely(&udp_encap_needed_key))
sk = udp4_gro_lookup_skb(skb, uh->source, uh->dest);
pp = udp_gro_receive(head, skb, uh, sk);
rcu_read_unlock();
return pp;
flush:

6
net/ipv6/ip6_offload.c
View file

@ -209,6 +209,7 @@ INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head,
flush += ntohs(iph->payload_len) != skb_gro_len(skb);
rcu_read_lock();
proto = iph->nexthdr;
ops = rcu_dereference(inet6_offloads[proto]);
if (!ops || !ops->callbacks.gro_receive) {
@ -221,7 +222,7 @@ INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head,
ops = rcu_dereference(inet6_offloads[proto]);
if (!ops || !ops->callbacks.gro_receive)
goto out;
goto out_unlock;
iph = ipv6_hdr(skb);
}
@ -279,6 +280,9 @@ not_same_flow:
pp = indirect_call_gro_receive_l4(tcp6_gro_receive, udp6_gro_receive,
ops->callbacks.gro_receive, head, skb);
out_unlock:
rcu_read_unlock();
out:
skb_gro_flush_final(skb, pp, flush);

2
net/ipv6/udp_offload.c
View file

@ -144,11 +144,13 @@ struct sk_buff *udp6_gro_receive(struct list_head *head, struct sk_buff *skb)
skip:
NAPI_GRO_CB(skb)->is_ipv6 = 1;
rcu_read_lock();
if (static_branch_unlikely(&udpv6_encap_needed_key))
sk = udp6_gro_lookup_skb(skb, uh->source, uh->dest);
pp = udp_gro_receive(head, skb, uh, sk);
rcu_read_unlock();
return pp;
flush: