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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>
This commit is contained in:
Ben Hutchings 2009-10-29 21:36:53 -07:00 committed by David S. Miller
parent 5b252f0c2f
commit c7c4b3b6e9
4 changed files with 42 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
include/linux/if_vlan.h
View File

@ -120,10 +120,12 @@ extern u16 vlan_dev_vlan_id(const struct net_device *dev);
extern int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
u16 vlan_tci, int polling);
extern int vlan_hwaccel_do_receive(struct sk_buff *skb);
extern int vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci, struct sk_buff *skb);
extern int vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci);
extern gro_result_t
vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci, struct sk_buff *skb);
extern gro_result_t
vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci);
#else
static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev)
@ -150,17 +152,18 @@ static inline int vlan_hwaccel_do_receive(struct sk_buff *skb)
return 0;
}
static inline int vlan_gro_receive(struct napi_struct *napi,
struct vlan_group *grp,
unsigned int vlan_tci, struct sk_buff *skb)
static inline gro_result_t
vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci, struct sk_buff *skb)
{
return NET_RX_DROP;
return GRO_DROP;
}
static inline int vlan_gro_frags(struct napi_struct *napi,
struct vlan_group *grp, unsigned int vlan_tci)
static inline gro_result_t
vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci)
{
return NET_RX_DROP;
return GRO_DROP;
}
#endif

8
include/linux/netdevice.h
View File

@ -1483,17 +1483,17 @@ extern int netif_receive_skb(struct sk_buff *skb);
extern void napi_gro_flush(struct napi_struct *napi);
extern gro_result_t dev_gro_receive(struct napi_struct *napi,
struct sk_buff *skb);
extern int napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
extern int napi_gro_receive(struct napi_struct *napi,
extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
extern gro_result_t napi_gro_receive(struct napi_struct *napi,
struct sk_buff *skb);
extern void napi_reuse_skb(struct napi_struct *napi,
struct sk_buff *skb);
extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
extern int napi_frags_finish(struct napi_struct *napi,
extern gro_result_t napi_frags_finish(struct napi_struct *napi,
struct sk_buff *skb,
gro_result_t ret);
extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
extern int napi_gro_frags(struct napi_struct *napi);
extern gro_result_t napi_gro_frags(struct napi_struct *napi);
static inline void napi_free_frags(struct napi_struct *napi)
{

16
net/8021q/vlan_core.c
View File

@ -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,

38
net/core/dev.c
View File

@ -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));
}