Attachment 149561 Details for Bug 231444 – linux-2.6.19-packet-auxdata-csum.patch

[patch] linux-2.6.19-packet-auxdata-csum.patch

linux-2.6.19-packet-auxdata-csum.patch (text/plain), 4.03 KB, created by Mark McLoughlin on 2007-03-08 12:28:04 UTC

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Creator: Mark McLoughlin

Created: 2007-03-08 12:28:04 UTC

Size: 4.03 KB

patch

obsolete

>--- linux-2.6.19.x86_64/net/packet/af_packet.c.packet-auxdata-csum	2006-11-29 21:57:37.000000000 +0000
>+++ linux-2.6.19.x86_64/net/packet/af_packet.c	2007-03-08 11:39:11.000000000 +0000
>@@ -199,7 +199,8 @@
> #endif
> 	struct packet_type	prot_hook;
> 	spinlock_t		bind_lock;
>-	char			running;	/* prot_hook is attached*/
>+	unsigned int		running:1,	/* prot_hook is attached*/
>+				auxdata:1;
> 	int			ifindex;	/* bound device		*/
> 	unsigned short		num;
> #ifdef CONFIG_PACKET_MULTICAST
>@@ -213,6 +214,8 @@
> #endif
> };
> 
>+#define PACKET_SKB_CB(__skb)	((struct tpacket_auxdata *)((__skb)->cb))
>+
> #ifdef CONFIG_PACKET_MMAP
> 
> static inline char *packet_lookup_frame(struct packet_sock *po, unsigned int position)
>@@ -467,6 +470,7 @@
> 	u8 * skb_head = skb->data;
> 	int skb_len = skb->len;
> 	unsigned snaplen;
>+	struct tpacket_auxdata *aux;
> 
> 	if (skb->pkt_type == PACKET_LOOPBACK)
> 		goto drop;
>@@ -525,6 +529,18 @@
> 	if (dev->hard_header_parse)
> 		sll->sll_halen = dev->hard_header_parse(skb, sll->sll_addr);
> 
>+	if (skb_checksum_setup(skb))
>+		goto drop_n_acct;
>+
>+	aux = PACKET_SKB_CB(skb);
>+	aux->tp_status = TP_STATUS_USER;
>+	if (skb->ip_summed == CHECKSUM_HW)
>+		aux->tp_status |= TP_STATUS_CSUMNOTREADY;
>+	aux->tp_len = skb->len;
>+	aux->tp_snaplen = snaplen;
>+	aux->tp_mac = 0;
>+	aux->tp_net = skb->nh.raw - skb->data;
>+
> 	if (pskb_trim(skb, snaplen))
> 		goto drop_n_acct;
> 
>@@ -594,6 +610,11 @@
> 	if (run_filter(skb, sk, &snaplen) < 0)
> 		goto drop_n_restore;
> 
>+	if (skb_checksum_setup(skb))
>+		goto drop;
>+	if (skb->ip_summed == CHECKSUM_HW)
>+		status |= TP_STATUS_CSUMNOTREADY;
>+
> 	if (sk->sk_type == SOCK_DGRAM) {
> 		macoff = netoff = TPACKET_ALIGN(TPACKET_HDRLEN) + 16;
> 	} else {
>@@ -1117,6 +1138,11 @@
> 	if (msg->msg_name)
> 		memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
> 
>+	if (pkt_sk(sk)->auxdata) {
>+		struct tpacket_auxdata *aux = PACKET_SKB_CB(skb);
>+		put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(*aux), aux);
>+	}
>+
> 	/*
> 	 *	Free or return the buffer as appropriate. Again this
> 	 *	hides all the races and re-entrancy issues from us.
>@@ -1315,6 +1341,7 @@
> packet_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
> {
> 	struct sock *sk = sock->sk;
>+	struct packet_sock *po = pkt_sk(sk);
> 	int ret;
> 
> 	if (level != SOL_PACKET)
>@@ -1367,6 +1394,18 @@
> 		return 0;
> 	}
> #endif
>+	case PACKET_AUXDATA:
>+	{
>+		int val;
>+
>+		if (optlen < sizeof(val))
>+			return -EINVAL;
>+		if (copy_from_user(&val, optval, sizeof(val)))
>+			return -EFAULT;
>+
>+		po->auxdata = !!val;
>+		return 0;
>+	}
> 	default:
> 		return -ENOPROTOOPT;
> 	}
>@@ -1376,8 +1415,11 @@
> 			     char __user *optval, int __user *optlen)
> {
> 	int len;
>+	int val;
> 	struct sock *sk = sock->sk;
> 	struct packet_sock *po = pkt_sk(sk);
>+	void *data;
>+	struct tpacket_stats st;
> 
> 	if (level != SOL_PACKET)
> 		return -ENOPROTOOPT;
>@@ -1390,9 +1432,6 @@
> 		
> 	switch(optname)	{
> 	case PACKET_STATISTICS:
>-	{
>-		struct tpacket_stats st;
>-
> 		if (len > sizeof(struct tpacket_stats))
> 			len = sizeof(struct tpacket_stats);
> 		spin_lock_bh(&sk->sk_receive_queue.lock);
>@@ -1401,16 +1440,23 @@
> 		spin_unlock_bh(&sk->sk_receive_queue.lock);
> 		st.tp_packets += st.tp_drops;
> 
>-		if (copy_to_user(optval, &st, len))
>-			return -EFAULT;
>+		data = &st;
>+		break;
>+	case PACKET_AUXDATA:
>+		if (len > sizeof(int))
>+			len = sizeof(int);
>+		val = po->auxdata;
>+
>+		data = &val;
> 		break;
>-	}
> 	default:
> 		return -ENOPROTOOPT;
> 	}
> 
> 	if (put_user(len, optlen))
> 		return -EFAULT;
>+	if (copy_to_user(optval, data, len))
>+		return -EFAULT;
> 	return 0;
> }
> 
>--- linux-2.6.19.x86_64/include/linux/if_packet.h.packet-auxdata-csum	2006-11-29 21:57:37.000000000 +0000
>+++ linux-2.6.19.x86_64/include/linux/if_packet.h	2007-03-08 11:39:11.000000000 +0000
>@@ -39,6 +39,7 @@
> #define PACKET_RX_RING			5
> #define PACKET_STATISTICS		6
> #define PACKET_COPY_THRESH		7
>+#define PACKET_AUXDATA			8
> 
> struct tpacket_stats
> {
>@@ -46,6 +47,15 @@
> 	unsigned int	tp_drops;
> };
> 
>+struct tpacket_auxdata
>+{
>+	__u32		tp_status;
>+	__u32		tp_len;
>+	__u32		tp_snaplen;
>+	__u16		tp_mac;
>+	__u16		tp_net;
>+};
>+
> struct tpacket_hdr
> {
> 	unsigned long	tp_status;

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Attachments on bug 231444: 149561 | 149562 | 152271