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authorBen Hutchings <bhutchings@solarflare.com>2009-10-29 21:36:53 -0700
committerDavid S. Miller <davem@davemloft.net>2009-10-29 21:36:53 -0700
commitc7c4b3b6e976b95facbb723951bdcd554a3530a4 (patch)
tree9a53a7f850eec755b3c66d4a129d31ce4a8591da /net
parentgro: Name the GRO result enumeration type (diff)
downloadlinux-dev-c7c4b3b6e976b95facbb723951bdcd554a3530a4.tar.xz
linux-dev-c7c4b3b6e976b95facbb723951bdcd554a3530a4.zip
gro: Change all receive functions to return GRO result codes
This will allow drivers to adjust their receive path dynamically based on whether GRO is being applied successfully. Currently all in-tree callers ignore the return values of these functions and do not need to be changed. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/8021q/vlan_core.c16
-rw-r--r--net/core/dev.c38
2 files changed, 24 insertions, 30 deletions
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 47a80d65c3b7..8d5ca2ac4f8d 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -102,11 +102,12 @@ drop:
return GRO_DROP;
}
-int vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
- unsigned int vlan_tci, struct sk_buff *skb)
+gro_result_t vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
+ unsigned int vlan_tci, struct sk_buff *skb)
{
if (netpoll_rx_on(skb))
- return vlan_hwaccel_receive_skb(skb, grp, vlan_tci);
+ return vlan_hwaccel_receive_skb(skb, grp, vlan_tci)
+ ? GRO_DROP : GRO_NORMAL;
skb_gro_reset_offset(skb);
@@ -114,17 +115,18 @@ int vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
}
EXPORT_SYMBOL(vlan_gro_receive);
-int vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
- unsigned int vlan_tci)
+gro_result_t vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
+ unsigned int vlan_tci)
{
struct sk_buff *skb = napi_frags_skb(napi);
if (!skb)
- return NET_RX_DROP;
+ return GRO_DROP;
if (netpoll_rx_on(skb)) {
skb->protocol = eth_type_trans(skb, skb->dev);
- return vlan_hwaccel_receive_skb(skb, grp, vlan_tci);
+ return vlan_hwaccel_receive_skb(skb, grp, vlan_tci)
+ ? GRO_DROP : GRO_NORMAL;
}
return napi_frags_finish(napi, skb,
diff --git a/net/core/dev.c b/net/core/dev.c
index 1dc13744684c..631cc40da197 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2586,18 +2586,15 @@ __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
return dev_gro_receive(napi, skb);
}
-int napi_skb_finish(gro_result_t ret, struct sk_buff *skb)
+gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb)
{
- int err = NET_RX_SUCCESS;
-
switch (ret) {
case GRO_NORMAL:
- return netif_receive_skb(skb);
+ if (netif_receive_skb(skb))
+ ret = GRO_DROP;
+ break;
case GRO_DROP:
- err = NET_RX_DROP;
- /* fall through */
-
case GRO_MERGED_FREE:
kfree_skb(skb);
break;
@@ -2607,7 +2604,7 @@ int napi_skb_finish(gro_result_t ret, struct sk_buff *skb)
break;
}
- return err;
+ return ret;
}
EXPORT_SYMBOL(napi_skb_finish);
@@ -2627,7 +2624,7 @@ void skb_gro_reset_offset(struct sk_buff *skb)
}
EXPORT_SYMBOL(skb_gro_reset_offset);
-int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
+gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
{
skb_gro_reset_offset(skb);
@@ -2657,26 +2654,21 @@ struct sk_buff *napi_get_frags(struct napi_struct *napi)
}
EXPORT_SYMBOL(napi_get_frags);
-int napi_frags_finish(struct napi_struct *napi, struct sk_buff *skb,
- gro_result_t ret)
+gro_result_t napi_frags_finish(struct napi_struct *napi, struct sk_buff *skb,
+ gro_result_t ret)
{
- int err = NET_RX_SUCCESS;
-
switch (ret) {
case GRO_NORMAL:
case GRO_HELD:
skb->protocol = eth_type_trans(skb, napi->dev);
- if (ret == GRO_NORMAL)
- return netif_receive_skb(skb);
-
- skb_gro_pull(skb, -ETH_HLEN);
+ if (ret == GRO_HELD)
+ skb_gro_pull(skb, -ETH_HLEN);
+ else if (netif_receive_skb(skb))
+ ret = GRO_DROP;
break;
case GRO_DROP:
- err = NET_RX_DROP;
- /* fall through */
-
case GRO_MERGED_FREE:
napi_reuse_skb(napi, skb);
break;
@@ -2685,7 +2677,7 @@ int napi_frags_finish(struct napi_struct *napi, struct sk_buff *skb,
break;
}
- return err;
+ return ret;
}
EXPORT_SYMBOL(napi_frags_finish);
@@ -2726,12 +2718,12 @@ out:
}
EXPORT_SYMBOL(napi_frags_skb);
-int napi_gro_frags(struct napi_struct *napi)
+gro_result_t napi_gro_frags(struct napi_struct *napi)
{
struct sk_buff *skb = napi_frags_skb(napi);
if (!skb)
- return NET_RX_DROP;
+ return GRO_DROP;
return napi_frags_finish(napi, skb, __napi_gro_receive(napi, skb));
}