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Ananda Raju e89e9cf539 [IPv4/IPv6]: UFO Scatter-gather approach ... Attached is kernel patch for UDP Fragmentation Offload (UFO) feature. 1. This patch incorporate the review comments by Jeff Garzik. 2. Renamed USO as UFO (UDP Fragmentation Offload) 3. udp sendfile support with UFO This patches uses scatter-gather feature of skb to generate large UDP datagram. Below is a "how-to" on changes required in network device driver to use the UFO interface. UDP Fragmentation Offload (UFO) Interface: ------------------------------------------- UFO is a feature wherein the Linux kernel network stack will offload the IP fragmentation functionality of large UDP datagram to hardware. This will reduce the overhead of stack in fragmenting the large UDP datagram to MTU sized packets 1) Drivers indicate their capability of UFO using dev->features |= NETIF_F_UFO | NETIF_F_HW_CSUM | NETIF_F_SG NETIF_F_HW_CSUM is required for UFO over ipv6. 2) UFO packet will be submitted for transmission using driver xmit routine. UFO packet will have a non-zero value for "skb_shinfo(skb)->ufo_size" skb_shinfo(skb)->ufo_size will indicate the length of data part in each IP fragment going out of the adapter after IP fragmentation by hardware. skb->data will contain MAC/IP/UDP header and skb_shinfo(skb)->frags[] contains the data payload. The skb->ip_summed will be set to CHECKSUM_HW indicating that hardware has to do checksum calculation. Hardware should compute the UDP checksum of complete datagram and also ip header checksum of each fragmented IP packet. For IPV6 the UFO provides the fragment identification-id in skb_shinfo(skb)->ip6_frag_id. The adapter should use this ID for generating IPv6 fragments. Signed-off-by: Ananda Raju <ananda.raju@neterion.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (forwarded) Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>		19 years ago
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Makefile	…
datagram.c	[NET]: Use non-recursive algorithm in skb_copy_datagram_iovec()	20 years ago
dev.c	[IPv4/IPv6]: UFO Scatter-gather approach	19 years ago
dev_mcast.c	…
dst.c	…
dv.c	…
ethtool.c	[IPv4/IPv6]: UFO Scatter-gather approach	19 years ago
filter.c	…
flow.c	…
gen_estimator.c	…
gen_stats.c	…
iovec.c	…
link_watch.c	[NET]: Disable queueing when carrier is lost.	20 years ago
neighbour.c	[NET]: Wider use of for_each_*cpu()	19 years ago
net-sysfs.c	…
netpoll.c	[IPV4]: Replace __in_dev_get with __in_dev_get_rcu/rtnl	20 years ago
pktgen.c	[PKTGEN]: proc interface revision	19 years ago
request_sock.c	…
rtnetlink.c	…
scm.c	[PATCH] kill gratitious includes of major.h under net/*	20 years ago
skbuff.c	[IPv4/IPv6]: UFO Scatter-gather approach	19 years ago
sock.c	[PATCH] gfp_t: net/*	19 years ago
stream.c	…
sysctl_net_core.c	…
utils.c	…
wireless.c	[PATCH] kill massive wireless-related log spam	19 years ago