linux/include/net/ip.h, branch v4.3

net: Introduce helper functions to get the per cpu data

2015-08-31T04:48:58Z

Signed-off-by: Raghavendra K T Signed-off-by: David S. Miller

net: Introduce ipv4_addr_hash and use it for tcp metrics

2015-08-28T20:32:35Z

Refactors a common line into helper function. Signed-off-by: David Ahern Signed-off-by: David S. Miller

net: Set sk_txhash from a random number

2015-07-30T05:44:04Z

This patch creates sk_set_txhash and eliminates protocol specific inet_set_txhash and ip6_set_txhash. sk_set_txhash simply sets a random number instead of performing flow dissection. sk_set_txash is also allowed to be called multiple times for the same socket, we'll need this when redoing the hash for negative routing advice. Signed-off-by: Tom Herbert Signed-off-by: David S. Miller

ipv6: lock socket in ip6_datagram_connect()

2015-07-16T00:25:51Z

ip6_datagram_connect() is doing a lot of socket changes without socket being locked. This looks wrong, at least for udp_lib_rehash() which could corrupt lists because of concurrent udp_sk(sk)->udp_portaddr_hash accesses. Signed-off-by: Eric Dumazet Acked-by: Herbert Xu Signed-off-by: David S. Miller

net: Add full IPv6 addresses to flow_keys

2015-06-04T22:44:30Z

This patch adds full IPv6 addresses into flow_keys and uses them as input to the flow hash function. The implementation supports either IPv4 or IPv6 addresses in a union, and selector is used to determine how may words to input to jhash2. We also add flow_get_u32_dst and flow_get_u32_src functions which are used to get a u32 representation of the source and destination addresses. For IPv6, ipv6_addr_hash is called. These functions retain getting the legacy values of src and dst in flow_keys. With this patch, Ethertype and IP protocol are now included in the flow hash input. Signed-off-by: Tom Herbert Signed-off-by: David S. Miller

net: Get skb hash over flow_keys structure

2015-06-04T22:44:30Z

This patch changes flow hashing to use jhash2 over the flow_keys structure instead just doing jhash_3words over src, dst, and ports. This method will allow us take more input into the hashing function so that we can include full IPv6 addresses, VLAN, flow labels etc. without needing to resort to xor'ing which makes for a poor hash. Acked-by: Jiri Pirko Signed-off-by: Tom Herbert Signed-off-by: David S. Miller

ip_fragment: don't forward defragmented DF packet

2015-05-27T17:03:31Z

We currently always send fragments without DF bit set. Thus, given following setup: mtu1500 - mtu1500:1400 - mtu1400:1280 - mtu1280 A R1 R2 B Where R1 and R2 run linux with netfilter defragmentation/conntrack enabled, then if Host A sent a fragmented packet _with_ DF set to B, R1 will respond with icmp too big error if one of these fragments exceeded 1400 bytes. However, if R1 receives fragment sizes 1200 and 100, it would forward the reassembled packet without refragmenting, i.e. R2 will send an icmp error in response to a packet that was never sent, citing mtu that the original sender never exceeded. The other minor issue is that a refragmentation on R1 will conceal the MTU of R2-B since refragmentation does not set DF bit on the fragments. This modifies ip_fragment so that we track largest fragment size seen both for DF and non-DF packets, and set frag_max_size to the largest value. If the DF fragment size is larger or equal to the non-df one, we will consider the packet a path mtu probe: We set DF bit on the reassembled skb and also tag it with a new IPCB flag to force refragmentation even if skb fits outdev mtu. We will also set DF bit on each fragment in this case. Joint work with Hannes Frederic Sowa. Reported-by: Jesse Gross Signed-off-by: Florian Westphal Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller

ip: remove unused function prototype

2015-05-19T20:54:36Z

ip_do_nat() function was removed prior to kernel 3.4. Remove the unnecessary function prototype as well. Reported-by: Florian Westphal Signed-off-by: Andy Zhou Signed-off-by: David S. Miller

bridge_netfilter: No ICMP packet on IPv4 fragmentation error

2015-05-19T04:15:39Z

When bridge netfilter re-fragments an IP packet for output, all packets that can not be re-fragmented to their original input size should be silently discarded. However, current bridge netfilter output path generates an ICMP packet with 'size exceeded MTU' message for such packets, this is a bug. This patch refactors the ip_fragment() API to allow two separate use cases. The bridge netfilter user case will not send ICMP, the routing output will, as before. Signed-off-by: Andy Zhou Acked-by: Florian Westphal Signed-off-by: David S. Miller

ipv4: introduce frag_expire_skip_icmp()

2015-05-19T04:15:26Z

Improve readability of skip ICMP for de-fragmentation expiration logic. This change will also make the logic easier to maintain when the following patches in this series are applied. Signed-off-by: Andy Zhou Signed-off-by: David S. Miller