linux.git/net/ipv4/ipip.c, branch v2.6.33

net: Simplify ipip pernet operations.

2009-12-02T00:15:58+00:00

Take advantage of the new pernet automatic storage management,
and stop using compatibility network namespace functions.

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

netns: net_identifiers should be read_mostly

2009-11-18T13:03:25+00:00

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

Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

2009-11-09T07:00:54+00:00

Conflicts:
	drivers/net/can/usb/ems_usb.c

ipip: Fix handling of DF packets when pmtudisc is OFF

2009-11-07T04:33:40+00:00

RFC 2003 requires the outer header to have DF set if DF is set
on the inner header, even when PMTU discovery is off for the
tunnel.  Our implementation does exactly that.

For this to work properly the IPIP gateway also needs to engate
in PMTU when the inner DF bit is set.  As otherwise the original
host would not be able to carry out its PMTU successfully since
part of the path is only visible to the gateway.

Unfortunately when the tunnel PMTU discovery setting is off, we
do not collect the necessary soft state, resulting in blackholes
when the original host tries to perform PMTU discovery.

This problem is not reproducible on the IPIP gateway itself as
the inner packet usually has skb->local_df set.  This is not
correctly cleared (an unrelated bug) when the packet passes
through the tunnel, which allows fragmentation to occur.  For
hosts behind the IPIP gateway it is readily visible with a simple
ping.

This patch fixes the problem by performing PMTU discovery for
all packets with the inner DF bit set, regardless of the PMTU
discovery setting on the tunnel itself.

Signed-off-by: Herbert Xu 
Signed-off-by: David S. Miller

ipip: Optimize multiple unregistration

2009-10-28T09:22:08+00:00

Speedup module unloading by factorizing synchronize_rcu() calls

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

ipip: convert hash tables locking to RCU

2009-10-24T13:07:57+00:00

IPIP tunnels use one rwlock to protect their hash tables.

This locking scheme can be converted to RCU for free, since netdevice
already must wait for a RCU grace period at dismantle time.

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

tunnels: Optimize tx path

2009-10-05T07:21:57+00:00

We currently dirty a cache line to update tunnel device stats
(tx_packets/tx_bytes). We better use the txq->tx_bytes/tx_packets
counters that already are present in cpu cache, in the cache
line shared with txq->_xmit_lock

This patch extends IPTUNNEL_XMIT() macro to use txq pointer
provided by the caller.

Also &tunnel->dev->stats can be replaced by &dev->stats

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

tunnel: eliminate recursion field

2009-09-24T22:39:22+00:00

It seems recursion field from "struct ip_tunnel" is not anymore needed.
recursion prevention is done at the upper level (in dev_queue_xmit()),
since we use HARD_TX_LOCK protection for tunnels.

This avoids a cache line ping pong on "struct ip_tunnel" : This structure
should be now mostly read on xmit and receive paths.

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

netdev: convert pseudo-devices to netdev_tx_t

2009-09-01T08:13:07+00:00

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

net: use NETDEV_TX_OK instead of 0 in ndo_start_xmit() functions

2009-07-06T02:16:04+00:00

This patch is the result of an automatic spatch transformation to convert
all ndo_start_xmit() return values of 0 to NETDEV_TX_OK.

Some occurences are missed by the automatic conversion, those will be
handled in a seperate patch.

Signed-off-by: Patrick McHardy 
Signed-off-by: David S. Miller