user/sven/linux.git/include/net/udp.h, branch v4.4.12

net: Remove iocb argument from sendmsg and recvmsg

2015-03-02T18:06:31Z

After TIPC doesn't depend on iocb argument in its internal implementations of sendmsg() and recvmsg() hooks defined in proto structure, no any user is using iocb argument in them at all now. Then we can drop the redundant iocb argument completely from kinds of implementations of both sendmsg() and recvmsg() in the entire networking stack. Cc: Christoph Hellwig Suggested-by: Al Viro Signed-off-by: Ying Xue Signed-off-by: David S. Miller

udp: In udp_flow_src_port use random hash value if skb_get_hash fails

2015-02-27T21:00:01Z

In the unlikely event that skb_get_hash is unable to deduce a hash in udp_flow_src_port we use a consistent random value instead. This is specified in GRE/UDP draft section 3.2.1: https://tools.ietf.org/html/draft-ietf-tsvwg-gre-in-udp-encap-04 Signed-off-by: Tom Herbert Signed-off-by: David S. Miller

udp: Generalize skb_udp_segment

2014-10-02T01:35:51Z

skb_udp_segment is the function called from udp4_ufo_fragment to segment a UDP tunnel packet. This function currently assumes segmentation is transparent Ethernet bridging (i.e. VXLAN encapsulation). This patch generalizes the function to operate on either Ethertype or IP protocol. The inner_protocol field must be set to the protocol of the inner header. This can now be either an Ethertype or an IP protocol (in a union). A new flag in the skbuff indicates which type is effective. skb_set_inner_protocol and skb_set_inner_ipproto helper functions were added to set the inner_protocol. These functions are called from the point where the tunnel encapsulation is occuring. When skb_udp_tunnel_segment is called, the function to segment the inner packet is selected based on the inner IP or Ethertype. In the case of an IP protocol encapsulation, the function is derived from inet[6]_offloads. In the case of Ethertype, skb->protocol is set to the inner_protocol and skb_mac_gso_segment is called. (GRE currently does this, but it might be possible to lookup the protocol in offload_base and call the appropriate segmenation function directly). Signed-off-by: Tom Herbert Signed-off-by: David S. Miller

udp: additional GRO support

2014-08-25T01:09:24Z

Implement GRO for UDPv6. Add UDP checksum verification in gro_receive for both UDP4 and UDP6 calling skb_gro_checksum_validate_zero_check. Signed-off-by: Tom Herbert Signed-off-by: David S. Miller

udp: Add function to make source port for UDP tunnels

2014-07-08T04:14:21Z

This patch adds udp_flow_src_port function which is intended to be a common function that UDP tunnel implementations call to set the source port. The source port is chosen so that a hash over the outer headers (IP addresses and UDP ports) acts as suitable hash for the flow of the encapsulated packet. In this manner, UDP encapsulation works with RSS and ECMP based wrt the inner flow. Signed-off-by: Tom Herbert Signed-off-by: David S. Miller

udp: call __skb_checksum_complete when doing full checksum

2014-06-15T08:00:49Z

In __udp_lib_checksum_complete check if checksum is being done over all the data (len is equal to skb->len) and if it is call __skb_checksum_complete instead of __skb_checksum_complete_head. This allows checksum to be saved in checksum complete. Signed-off-by: Tom Herbert Signed-off-by: David S. Miller

udp: Generic functions to set checksum

2014-06-05T05:46:38Z

Added udp_set_csum and udp6_set_csum functions to set UDP checksums in packets. These are for simple UDP packets such as those that might be created in UDP tunnels. Signed-off-by: Tom Herbert Signed-off-by: David S. Miller

net: Split sk_no_check into sk_no_check_{rx,tx}

2014-05-23T20:28:53Z

Define separate fields in the sock structure for configuring disabling checksums in both TX and RX-- sk_no_check_tx and sk_no_check_rx. The SO_NO_CHECK socket option only affects sk_no_check_tx. Also, removed UDP_CSUM_* defines since they are no longer necessary. Signed-off-by: Tom Herbert Signed-off-by: David S. Miller

udp: Remove unnecessary semicolon from do{}while (0) macro

2013-11-07T07:14:33Z

Just an unnecessary semicolon that should be removed... Whitespace neatening of macro too. Signed-off-by: Joe Perches Signed-off-by: David S. Miller

udp: ipv4: Add udp early demux

2013-10-08T20:27:33Z

The removal of the routing cache introduced a performance regression for some UDP workloads since a dst lookup must be done for each packet. This change caches the dst per socket in a similar manner to what we do for TCP by implementing early_demux. For UDP multicast we can only cache the dst if there is only one receiving socket on the host. Since caching only works when there is one receiving socket we do the multicast socket lookup using RCU. For UDP unicast we only demux sockets with an exact match in order to not break forwarding setups. Additionally since the hash chains may be long we only check the first socket to see if it is a match and not waste extra time searching the whole chain when we might not find an exact match. Benchmark results from a netperf UDP_RR test: Before 87961.22 transactions/s After 89789.68 transactions/s Benchmark results from a fio 1 byte UDP multicast pingpong test (Multicast one way unicast response): Before 12.97us RTT After 12.63us RTT Signed-off-by: Shawn Bohrer Signed-off-by: David S. Miller