linux-toradex.git/include/net/dst.h, branch v3.6

net: force dst_default_metrics to const section

2012-08-08T23:00:28+00:00

While investigating on network performance problems, I found this little
gem :

$ nm -v vmlinux | grep -1 dst_default_metrics
ffffffff82736540 b busy.46605
ffffffff82736560 B dst_default_metrics
ffffffff82736598 b dst_busy_list

Apparently, declaring a const array without initializer put it in
(writeable) bss section, in middle of possibly often dirtied cache
lines.

Since we really want dst_default_metrics be const to avoid any possible
false sharing and catch any buggy writes, I force a null initializer.

ffffffff818a4c20 R dst_default_metrics

Signed-off-by: Eric Dumazet 
Cc: Ben Hutchings 
Signed-off-by: David S. Miller

ipv4: Kill routes during PMTU/redirect updates.

2012-07-20T20:31:22+00:00

Mark them obsolete so there will be a re-lookup to fetch the
FIB nexthop exception info.

Signed-off-by: David S. Miller

net: Document dst->obsolete better.

2012-07-20T20:31:21+00:00

Add a big comment explaining how the field works, and use defines
instead of magic constants for the values assigned to it.

Suggested by Joe Perches.

Signed-off-by: David S. Miller

net: Kill set_dst_metric_rtt().

2012-07-11T05:40:07+00:00

No longer used.

Signed-off-by: David S. Miller

net: Kill dst->_neighbour, accessors, and final uses.

2012-07-05T09:42:00+00:00

No longer used.

Signed-off-by: David S. Miller

net: Add optional SKB arg to dst_ops->neigh_lookup().

2012-07-05T08:04:01+00:00

Causes the handler to use the daddr in the ipv4/ipv6 header when
the route gateway is unspecified (local subnet).

Signed-off-by: David S. Miller

net: Do delayed neigh confirmation.

2012-07-05T08:03:06+00:00

When a dst_confirm() happens, mark the confirmation as pending in the
dst.  Then on the next packet out, when we have the neigh in-hand, do
the update.

This removes the dependency in dst_confirm() of dst's having an
attached neigh.

While we're here, remove the explicit 'dst' NULL check, all except 2
or 3 call sites ensure it's not NULL.  So just fix those cases up.

Signed-off-by: David S. Miller

include/net/dst.h: neaten asterisk placement

2012-06-16T22:20:35+00:00

Fix code style - place the asterisk where it belongs.

Signed-off-by: Eldad Zack 
Signed-off-by: David S. Miller

ipv6: fix incorrect ipsec fragment

2012-05-27T05:11:22+00:00

Since commit ad0081e43a
"ipv6: Fragment locally generated tunnel-mode IPSec6 packets as needed"
the fragment of packets is incorrect.
because tunnel mode needs IPsec headers and trailer for all fragments,
while on transport mode it is sufficient to add the headers to the
first fragment and the trailer to the last.

so modify mtu and maxfraglen base on ipsec mode and if fragment is first
or last.

with my test,it work well(every fragment's size is the mtu)
and does not trigger slow fragment path.

Changes from v1:
	though optimization, mtu_prev and maxfraglen_prev can be delete.
	replace xfrm mode codes with dst_entry's new frag DST_XFRM_TUNNEL.
	add fuction ip6_append_data_mtu to make codes clearer.

Signed-off-by: Gao feng 
Signed-off-by: David S. Miller

set fake_rtable's dst to NULL to avoid kernel Oops

2012-04-24T04:16:24+00:00

bridge: set fake_rtable's dst to NULL to avoid kernel Oops

when bridge is deleted before tap/vif device's delete, kernel may
encounter an oops because of NULL reference to fake_rtable's dst.
Set fake_rtable's dst to NULL before sending packets out can solve
this problem.

v4 reformat, change br_drop_fake_rtable(skb) to {}

v3 enrich commit header

v2 introducing new flag DST_FAKE_RTABLE to dst_entry struct.

[ Use "do { } while (0)" for nop br_drop_fake_rtable()
  implementation -DaveM ]

Acked-by: Eric Dumazet 
Signed-off-by: Peter Huang 
Signed-off-by: David S. Miller