linux-toradex.git/net/ipv6, branch v3.12-rc7

ipv6: probe routes asynchronous in rt6_probe

2013-10-21T22:56:22+00:00

Routes need to be probed asynchronous otherwise the call stack gets
exhausted when the kernel attemps to deliver another skb inline, like
e.g. xt_TEE does, and we probe at the same time.

We update neigh->updated still at once, otherwise we would send to
many probes.

Cc: Julian Anastasov 
Signed-off-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

ipv6: fill rt6i_gateway with nexthop address

2013-10-21T22:37:01+00:00

Make sure rt6i_gateway contains nexthop information in
all routes returned from lookup or when routes are directly
attached to skb for generated ICMP packets.

The effect of this patch should be a faster version of
rt6_nexthop() and the consideration of local addresses as
nexthop.

Signed-off-by: Julian Anastasov 
Acked-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

ip6_output: do skb ufo init for peeked non ufo skb as well

2013-10-19T23:20:52+00:00

Now, if user application does:
sendto lenmtu flag 0
The skb is not treated as fragmented one because it is not initialized
that way. So move the initialization to fix this.

introduced by:
commit e89e9cf539a28df7d0eb1d0a545368e9920b34ac "[IPv4/IPv6]: UFO Scatter-gather approach"

Signed-off-by: Jiri Pirko 
Acked-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

udp6: respect IPV6_DONTFRAG sockopt in case there are pending frames

2013-10-19T23:20:52+00:00

if up->pending != 0 dontfrag is left with default value -1. That
causes that application that do:
sendto len>mtu flag MSG_MORE
sendto len>mtu flag 0
will receive EMSGSIZE errno as the result of the second sendto.

This patch fixes it by respecting IPV6_DONTFRAG socket option.

introduced by:
commit 4b340ae20d0e2366792abe70f46629e576adaf5e "IPv6: Complete IPV6_DONTFRAG support"

Signed-off-by: Jiri Pirko 
Acked-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

ipv6: Initialize ip6_tnl.hlen in gre tunnel even if no route is found

2013-10-11T21:50:59+00:00

The ip6_tnl.hlen (gre and ipv6 headers length) is independent from the
outgoing interface, so it would be better to initialize it even when no
route is found, otherwise its value will be zero.
While I'm not sure if this could happen in real life, but doing that
will avoid to call the skb_push function with a zero in ip6gre_header
function.

Suggested-by: Hannes Frederic Sowa 
Signed-off-by: Oussama Ghorbel 
Acked-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec

2013-10-09T17:41:45+00:00

Steffen Klassert says:

====================
1) We used the wrong netlink attribute to verify the
   lenght of the replay window on async events. Fix this by
   using the right netlink attribute.

2) Policy lookups can not match the output interface on forwarding.
   Add the needed informations to the flow informations.

3) We update the pmtu when we receive a ICMPV6_DEST_UNREACH message
   on IPsec with ipv6. This is wrong and leads to strange fragmented
   packets, only ICMPV6_PKT_TOOBIG messages should update the pmtu.
   Fix this by removing the ICMPV6_DEST_UNREACH check from the IPsec
   protocol error handlers.

4) The legacy IPsec anti replay mechanism supports anti replay
   windows up to 32 packets. If a user requests for a bigger
   anti replay window, we use 32 packets but pretend that we use
   the requested window size. Fix from Fan Du.

5) If asynchronous events are enabled and replay_maxdiff is set to
   zero, we generate an async event for every received packet instead
   of checking whether a timeout occurred. Fix from Thomas Egerer.

6) Policies need a refcount when the state resolution timer is armed.
   Otherwise the timer can fire after the policy is deleted.

7) We might dreference a NULL pointer if the hold_queue is empty,
   add a check to avoid this.
====================

Signed-off-by: David S. Miller

ipv6: Fix the upper MTU limit in GRE tunnel

2013-10-08T20:32:40+00:00

Unlike ipv4, the struct member hlen holds the length of the GRE and ipv6
headers. This length is also counted in dev->hard_header_len.
Perhaps, it's more clean to modify the hlen to count only the GRE header
without ipv6 header as the variable name suggest, but the simple way to fix
this without regression risk is simply modify the calculation of the limit
in ip6gre_tunnel_change_mtu function.
Verified in kernel version v3.11.

Signed-off-by: Oussama Ghorbel 
Acked-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

ipv6: Allow the MTU of ipip6 tunnel to be set below 1280

2013-10-07T16:32:26+00:00

The (inner) MTU of a ipip6 (IPv4-in-IPv6) tunnel cannot be set below 1280, which is the minimum MTU in IPv6.
However, there should be no IPv6 on the tunnel interface at all, so the IPv6 rules should not apply.
More info at https://bugzilla.kernel.org/show_bug.cgi?id=15530

This patch allows to check the minimum MTU for ipv6 tunnel according to these rules:
-In case the tunnel is configured with ipip6 mode the minimum MTU is 68.
-In case the tunnel is configured with ip6ip6 or any mode the minimum MTU is 1280.

Signed-off-by: Oussama Ghorbel 
Acked-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

net: do not call sock_put() on TIMEWAIT sockets

2013-10-02T21:05:54+00:00

commit 3ab5aee7fe84 ("net: Convert TCP & DCCP hash tables to use RCU /
hlist_nulls") incorrectly used sock_put() on TIMEWAIT sockets.

We should instead use inet_twsk_put()

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

ip6tnl: allow to use rtnl ops on fb tunnel

2013-10-01T16:55:53+00:00

rtnl ops where introduced by c075b13098b3 ("ip6tnl: advertise tunnel param via
rtnl"), but I forget to assign rtnl ops to fb tunnels.

Now that it is done, we must remove the explicit call to
unregister_netdevice_queue(), because  the fallback tunnel is added to the queue
in ip6_tnl_destroy_tunnels() when checking rtnl_link_ops of all netdevices (this
is valid since commit 0bd8762824e7 ("ip6tnl: add x-netns support")).

Signed-off-by: Nicolas Dichtel 
Signed-off-by: David S. Miller