linux-toradex.git/include/linux/if_macvlan.h, branch T20_LinuxImageV2.0Beta1_20121218

macvlan: lockless tx path

2010-11-16T18:58:30+00:00

macvlan is a stacked device, like tunnels. We should use the lockless
mechanism we are using in tunnels and loopback.

This patch completely removes locking in TX path.

tx stat counters are added into existing percpu stat structure, renamed
from rx_stats to pcpu_stats.

Note : this reverts commit 2c11455321f37 (macvlan: add multiqueue
capability)

Note : rx_errors converted to a 32bit counter, like tx_dropped, since
they dont need 64bit range.

Signed-off-by: Eric Dumazet 
Cc: Patrick McHardy 
Cc: Ben Greear 
Cc: Ben Hutchings 
Acked-by: Patrick McHardy 
Signed-off-by: David S. Miller

include/linux/if_macvlan.h: Remove unnecessary semicolons

2010-11-15T19:07:15+00:00

Signed-off-by: Joe Perches 
Signed-off-by: David S. Miller

macvtap: Implement multiqueue for macvtap driver

2010-08-17T04:06:25+00:00

Implement multiqueue facility for macvtap driver. The idea is that
a macvtap device can be opened multiple times and the fd's can be
used to register eg, as backend for vhost.

Signed-off-by: Krishna Kumar 
Signed-off-by: David S. Miller

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

2010-07-28T04:01:35+00:00

Conflicts:
	drivers/net/bnx2x_main.c

Merge bnx2x bug fixes in by hand... :-/

Signed-off-by: David S. Miller

macvtap: Limit packet queue length

2010-07-22T20:08:56+00:00

Mark Wagner reported OOM symptoms when sending UDP traffic over
a macvtap link to a kvm receiver.

This appears to be caused by the fact that macvtap packet queues
are unlimited in length.  This means that if the receiver can't
keep up with the rate of flow, then we will hit OOM. Of course
it gets worse if the OOM killer then decides to kill the receiver.

This patch imposes a cap on the packet queue length, in the same
way as the tuntap driver, using the device TX queue length.

Please note that macvtap currently has no way of giving congestion
notification, that means the software device TX queue cannot be
used and packets will always be dropped once the macvtap driver
queue fills up.

This shouldn't be a great problem for the scenario where macvtap
is used to feed a kvm receiver, as the traffic is most likely
external in origin so congestion notification can't be applied
anyway.

Of course, if anybody decides to complain about guest-to-guest
UDP packet loss down the track, then we may have to revisit this.

Incidentally, this patch also fixes a real memory leak when
macvtap_get_queue fails.

Chris Wright noticed that for this patch to work, we need a
non-zero TX queue length.  This patch includes his work to change
the default macvtap TX queue length to 500.

Reported-by: Mark Wagner 
Signed-off-by: Herbert Xu 
Acked-by: Chris Wright 
Acked-by: Arnd Bergmann 
Signed-off-by: David S. Miller

macvlan: 64 bit rx counters

2010-06-29T06:24:30+00:00

Use u64_stats_sync infrastructure to implement 64bit stats.

Signed-off-by: Eric Dumazet 
Acked-by: Patrick McHardy 
Signed-off-by: David S. Miller

net: replace hooks in __netif_receive_skb V5

2010-06-02T14:11:15+00:00

What this patch does is it removes two receive frame hooks (for bridge and for
macvlan) from __netif_receive_skb. These are replaced them with a single
hook for both. It only supports one hook per device because it makes no
sense to do bridging and macvlan on the same device.

Then a network driver (of virtual netdev like macvlan or bridge) can register
an rx_handler for needed net device.

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

net: adjust handle_macvlan to pass port struct to hook

2010-05-16T06:48:02+00:00

Now there's null check here and also again in the hook. Looking at bridge bits
which are simmilar, port structure is rcu_dereferenced right away in
handle_bridge and passed to hook. Looks nicer.

Signed-off-by: Jiri Pirko 
Acked-by: Patrick McHardy 
Signed-off-by: David S. Miller

net/macvtap: add vhost support

2010-02-18T22:08:38+00:00

This adds support for passing a macvtap file descriptor into
vhost-net, much like we already do for tun/tap.

Most of the new code is taken from the respective patch
in the tun driver and may get consolidated in the future.

Signed-off-by: Arnd Bergmann 
Acked-by: Sridhar Samudrala 
Signed-off-by: David S. Miller

percpu: add __percpu sparse annotations to net drivers

2010-02-17T07:05:38+00:00

Add __percpu sparse annotations to net drivers.

These annotations are to make sparse consider percpu variables to be
in a different address space and warn if accessed without going
through percpu accessors.  This patch doesn't affect normal builds.

Signed-off-by: Tejun Heo 
Acked-by: David S. Miller 
Cc: Eric Dumazet 
Cc: Arnd Bergmann 
Signed-off-by: David S. Miller