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netpoll: fix rx_hook() interface by passing the skb

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Right now skb->data is passed to rx_hook() even if the skb
has not been linearised and without giving rx_hook() a way
to linearise it.

Change the rx_hook() interface and make it accept the skb
and the offset to the UDP payload as arguments. rx_hook() is
also renamed to rx_skb_hook() to ensure that out of the tree
users notice the API change.

In this way any rx_skb_hook() implementation can perform all
the needed operations to properly (and safely) access the
skb data.

Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Antonio Quartulli 2013-10-23 23:36:30 +02:00 • committed by David S. Miller
parent c7c6effdef
commit 8fb479a47c
2 changed files with 21 additions and 15 deletions
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5
include/linux/netpoll.h
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@ -24,7 +24,8 @@ struct netpoll {
struct net_device *dev;
char dev_name[IFNAMSIZ];
const char *name;
void (*rx_hook)(struct netpoll *, int, char *, int);
void (*rx_skb_hook)(struct netpoll *np, int source, struct sk_buff *skb,
int offset, int len);
union inet_addr local_ip, remote_ip;
bool ipv6;
@ -41,7 +42,7 @@ struct netpoll_info {
unsigned long rx_flags;
spinlock_t rx_lock;
struct semaphore dev_lock;
struct list_head rx_np; /* netpolls that registered an rx_hook */
struct list_head rx_np; /* netpolls that registered an rx_skb_hook */
struct sk_buff_head neigh_tx; /* list of neigh requests to reply to */
struct sk_buff_head txq;