Implement finding of correct netchannel for buffer, default netchannel and
attach a netchannel to a socket
Signed-off-by: Kelly Daly <[EMAIL PROTECTED]>
---
diff -urp davem/include/linux/netchannel.h
kelly_new/include/linux/netchannel.h
--- davem/include/linux/netchannel.h 2006-06-16 15:14:15.000000000 +1000
+++ kelly_new/include/linux/netchannel.h 2006-07-10 14:04:54.000000000
+1000
@@ -19,6 +19,7 @@ struct netchannel {
void (*netchan_callb)(struct netchannel *);
void *netchan_callb_data;
unsigned long netchan_head;
+ wait_queue_head_t wq;
};
extern void netchannel_init(struct netchannel *,
@@ -56,6 +57,11 @@ static inline unsigned char *netchan_buf
return netchan_buf_base(bp) + bp->netchan_buf_offset;
}
+static inline int netchan_data_len(const struct netchannel_buftrailer *bp)
+{
+ return bp->netchan_buf_len - bp->netchan_buf_offset;
+}
+
extern int netchannel_enqueue(struct netchannel *, struct
netchannel_buftrailer *);
extern struct netchannel_buftrailer *__netchannel_dequeue(struct netchannel
*);
static inline struct netchannel_buftrailer *netchannel_dequeue(struct
netchannel *np)
@@ -65,6 +71,10 @@ static inline struct netchannel_buftrail
return __netchannel_dequeue(np);
}
+extern struct netchannel *find_netchannel(const struct netchannel_buftrailer
*bp);
+extern int sock_add_netchannel(struct sock *sk);
extern struct sk_buff *skb_netchan_graft(struct netchannel_buftrailer *,
gfp_t);
#endif /* _LINUX_NETCHANNEL_H */
diff -urp davem/include/net/inet_hashtables.h
kelly_new/include/net/inet_hashtables.h
--- davem/include/net/inet_hashtables.h 2006-06-16 14:34:20.000000000 +1000
+++ kelly_new/include/net/inet_hashtables.h 2006-06-19 10:42:45.000000000
+1000
@@ -418,4 +418,7 @@ static inline struct sock *inet_lookup(s
extern int inet_hash_connect(struct inet_timewait_death_row *death_row,
struct sock *sk);
+extern void inet_hash_register(u8 proto, struct inet_hashinfo *hashinfo);
+extern struct sock *inet_lookup_proto(u8 protocol, u32 saddr, u16 sport, u32
daddr, u16 dport, int ifindex);
+
#endif /* _INET_HASHTABLES_H */
diff -urp davem/include/net/sock.h kelly_new/include/net/sock.h
--- davem/include/net/sock.h 2006-06-16 15:14:16.000000000 +1000
+++ kelly_new/include/net/sock.h 2006-06-19 10:42:45.000000000 +1000
@@ -196,6 +196,7 @@ struct sock {
unsigned short sk_type;
int sk_rcvbuf;
socket_lock_t sk_lock;
+ struct netchannel *sk_channel;
wait_queue_head_t *sk_sleep;
struct dst_entry *sk_dst_cache;
struct xfrm_policy *sk_policy[2];
diff -urp davem/net/core/dev.c kelly_new/net/core/dev.c
--- davem/net/core/dev.c 2006-06-16 15:14:16.000000000 +1000
+++ kelly_new/net/core/dev.c 2006-07-10 14:11:22.000000000 +1000
@@ -113,9 +113,12 @@
#include <linux/delay.h>
#include <linux/wireless.h>
#include <linux/netchannel.h>
+#include <linux/kthread.h>
+#include <linux/wait.h>
#include <net/iw_handler.h>
#include <asm/current.h>
#include <linux/audit.h>
+#include <net/inet_hashtables.h>
/*
* The list of packet types we will receive (as opposed to discard)
@@ -190,6 +193,8 @@ static inline struct hlist_head *dev_ind
return &dev_index_head[ifindex & ((1<<NETDEV_HASHBITS)-1)];
}
+static struct netchannel default_netchannel;
+
/*
* Our notifier list
*/
@@ -1854,11 +1859,18 @@ softnet_break:
goto out;
}
+void netchannel_wake(struct netchannel *np)
+{
+ wake_up(&np->wq);
+}
+
void netchannel_init(struct netchannel *np,
void (*callb)(struct netchannel *), void *callb_data)
{
memset(np, 0, sizeof(*np));
+ init_waitqueue_head(&np->wq);
+
np->netchan_callb = callb;
np->netchan_callb_data = callb_data;
}
@@ -1912,6 +1924,122 @@ struct netchannel_buftrailer *__netchann
}
EXPORT_SYMBOL_GPL(__netchannel_dequeue);
+/* Find the channel for a packet, or return default channel. */
+struct netchannel *find_netchannel(const struct netchannel_buftrailer *bp)
+{
+ struct sock *sk = NULL;
+ int datalen = netchan_data_len(bp);
+
+ switch (bp->netchan_buf_proto) {
+ case __constant_htons(ETH_P_IP): {
+ struct iphdr *ip = (void *)bp - datalen;
+ int iphl = ip->ihl * 4;
+
+ /* FIXME: Do sanity checks, parse packet. */
+
+ if (datalen >+ (iphl + 4) && iphl == sizeof(struct iphdr)) {
+ u16 *ports = (u16 *)ip + 1;
+ sk = inet_lookup_proto(ip->protocol,
+ ip->saddr, ports[0],
+ ip->daddr, ports[1],
+ bp->netchan_buf_dev->ifindex);
+ }
+ break;
+ }
+ }
+
+ if (sk && sk->sk_channel)
+ return sk->sk_channel;
+ return &default_netchannel;
+}
+EXPORT_SYMBOL_GPL(find_netchannel);
+
+/* add the netchannel to the socket */
+int sock_add_netchannel(struct sock *sk)
+{
+ struct netchannel *np;
+
+ np = kmalloc(sizeof(struct netchannel), GFP_KERNEL);
+ if (!np)
+ return -ENOMEM;
+ netchannel_init(np, netchannel_wake, (void *)np);
+ sk->sk_channel = np;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(sock_add_netchannel);
+
+/* deal with packets coming to default thread */
+static int netchannel_default_thread(void *unused)
+{
+ struct netchannel *np = &default_netchannel;
+ struct netchannel_buftrailer *nbp;
+ struct sk_buff *skbp;
+ DECLARE_WAITQUEUE(wait, current);
+
+ add_wait_queue(&np->wq, &wait);
+ set_current_state(TASK_UNINTERRUPTIBLE);
+
+ while (!kthread_should_stop()) {
+ while (np->netchan_tail != np->netchan_head) {
+ nbp = netchannel_dequeue(np);
+ skbp = skb_netchan_graft(nbp, GFP_KERNEL);
+ netif_receive_skb(skbp);
+ }
+ schedule();
+ set_current_state(TASK_INTERRUPTIBLE);
+ }
+
+ remove_wait_queue(&np->wq, &wait);
+ __set_current_state(TASK_RUNNING);
+
+ return 0;
+}
+
static gifconf_func_t * gifconf_list [NPROTO];
/**
@@ -3426,6 +3554,10 @@ static int __init net_dev_init(void)
hotcpu_notifier(dev_cpu_callback, 0);
dst_init();
dev_mcast_init();
+
+ netchannel_init(&default_netchannel, netchannel_wake, (void
*)&default_netchannel);
+ kthread_run(netchannel_default_thread, NULL, "nc_def");
+
rc = 0;
out:
return rc;
-
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