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alistair23-linux
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gro: Defer clearing of flush bit in tunnel paths 

This patch updates the GRO handlers for GRE, VXLAN, GENEVE, and FOU so that
we do not clear the flush bit until after we have called the next level GRO
handler.  Previously this was being cleared before parsing through the list
of frames, however this resulted in several paths where either the bit
needed to be reset but wasn't as in the case of FOU, or cases where it was
being set as in GENEVE.  By just deferring the clearing of the bit until
after the next level protocol has been parsed we can avoid any unnecessary
bit twiddling and avoid bugs.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Alexander Duyck 2016-03-09 09:24:23 -08:00 committed by David S. Miller
parent 3a8befcd78
commit c194cf93c1
4 changed files with 5 additions and 11 deletions
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7
drivers/net/geneve.c
View File

@ -463,8 +463,6 @@ static struct sk_buff **geneve_gro_receive(struct sk_buff **head,
goto out;
}
flush = 0;
for (p = *head; p; p = p->next) {
if (!NAPI_GRO_CB(p)->same_flow)
continue;
@ -481,14 +479,13 @@ static struct sk_buff **geneve_gro_receive(struct sk_buff **head,
rcu_read_lock();
ptype = gro_find_receive_by_type(type);
if (!ptype) {
flush = 1;
if (!ptype)
goto out_unlock;
}
skb_gro_pull(skb, gh_len);
skb_gro_postpull_rcsum(skb, gh, gh_len);
pp = ptype->callbacks.gro_receive(head, skb);
flush = 0;
out_unlock:
rcu_read_unlock();

3
drivers/net/vxlan.c
View File

@ -591,8 +591,6 @@ static struct sk_buff **vxlan_gro_receive(struct sk_buff **head,
skb_gro_pull(skb, sizeof(struct vxlanhdr)); /* pull vxlan header */
flush = 0;
for (p = *head; p; p = p->next) {
if (!NAPI_GRO_CB(p)->same_flow)
continue;
@ -606,6 +604,7 @@ static struct sk_buff **vxlan_gro_receive(struct sk_buff **head,
}
pp = eth_gro_receive(head, skb);
flush = 0;
out:
skb_gro_remcsum_cleanup(skb, &grc);

3
net/ipv4/fou.c
View File

@ -319,8 +319,6 @@ static struct sk_buff **gue_gro_receive(struct sk_buff **head,
skb_gro_pull(skb, hdrlen);
flush = 0;
for (p = *head; p; p = p->next) {
const struct guehdr *guehdr2;
@ -352,6 +350,7 @@ static struct sk_buff **gue_gro_receive(struct sk_buff **head,
goto out_unlock;
pp = ops->callbacks.gro_receive(head, skb);
flush = 0;
out_unlock:
rcu_read_unlock();

3
net/ipv4/gre_offload.c
View File

@ -175,8 +175,6 @@ static struct sk_buff **gre_gro_receive(struct sk_buff **head,
null_compute_pseudo);
}
flush = 0;
for (p = *head; p; p = p->next) {
const struct gre_base_hdr *greh2;
@ -213,6 +211,7 @@ static struct sk_buff **gre_gro_receive(struct sk_buff **head,
skb_gro_postpull_rcsum(skb, greh, grehlen);
pp = ptype->callbacks.gro_receive(head, skb);
flush = 0;
out_unlock:
rcu_read_unlock();