linux-stable.git/net/ipv4/ip_output.c, branch v4.4

ipv4: add defensive check for CHECKSUM_PARTIAL skbs in ip_fragment

2015-11-01T17:01:27+00:00

CHECKSUM_PARTIAL skbs should never arrive in ip_fragment. If we get one
of those warn about them once and handle them gracefully by recalculating
the checksum.

Cc: Eric Dumazet 
Cc: Vlad Yasevich 
Cc: Benjamin Coddington 
Cc: Tom Herbert 
Signed-off-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

ipv4: no CHECKSUM_PARTIAL on MSG_MORE corked sockets

2015-11-01T17:01:27+00:00

We cannot reliable calculate packet size on MSG_MORE corked sockets
and thus cannot decide if they are going to be fragmented later on,
so better not use CHECKSUM_PARTIAL in the first place.

Cc: Eric Dumazet 
Cc: Vlad Yasevich 
Cc: Benjamin Coddington 
Cc: Tom Herbert 
Signed-off-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

tcp: do not set queue_mapping on SYNACK

2015-10-19T05:26:02+00:00

At the time of commit fff326990789 ("tcp: reflect SYN queue_mapping into
SYNACK packets") we had little ways to cope with SYN floods.

We no longer need to reflect incoming skb queue mappings, and instead
can pick a TX queue based on cpu cooking the SYNACK, with normal XPS
affinities.

Note that all SYNACK retransmits were picking TX queue 0, this no longer
is a win given that SYNACK rtx are now distributed on all cpus.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

dst: Pass net into dst->output

2015-10-08T11:27:03+00:00

The network namespace is already passed into dst_output pass it into
dst->output lwt->output and friends.

Signed-off-by: "Eric W. Biederman" 
Signed-off-by: David S. Miller

ipv4, ipv6: Pass net into ip_local_out and ip6_local_out

2015-10-08T11:27:02+00:00

Signed-off-by: "Eric W. Biederman" 
Signed-off-by: David S. Miller

ipv4, ipv6: Pass net into __ip_local_out and __ip6_local_out

2015-10-08T11:27:02+00:00

Signed-off-by: "Eric W. Biederman" 
Signed-off-by: David S. Miller

ipv4: Cache net in ip_build_and_send_pkt and ip_queue_xmit

2015-10-08T11:26:59+00:00

Compute net and store it in a variable in the functions
ip_build_and_send_pkt and ip_queue_xmit so that it does not need to be
recomputed next time it is needed.

Signed-off-by: "Eric W. Biederman" 
Signed-off-by: David S. Miller

ipv4: Merge ip_local_out and ip_local_out_sk

2015-10-08T11:26:57+00:00

It is confusing and silly hiding a parameter so modify all of
the callers to pass in the appropriate socket or skb->sk if
no socket is known.

Signed-off-by: "Eric W. Biederman" 
Signed-off-by: David S. Miller

ipv4: Merge __ip_local_out and __ip_local_out_sk

2015-10-08T11:26:57+00:00

Signed-off-by: "Eric W. Biederman" 
Signed-off-by: David S. Miller

dst: Pass a sk into .local_out

2015-10-08T11:26:55+00:00

For consistency with the other similar methods in the kernel pass a
struct sock into the dst_ops .local_out method.

Simplifying the socket passing case is needed a prequel to passing a
struct net reference into .local_out.

Signed-off-by: "Eric W. Biederman" 
Signed-off-by: David S. Miller