linux-toradex.git/net/sched/em_meta.c, branch v4.2.3

net: rename vlan_tx_* helpers since "tx" is misleading there

2015-01-13T22:51:08+00:00

The same macros are used for rx as well. So rename it.

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

net: sched: fix skb->protocol use in case of accelerated vlan path

2015-01-13T22:51:08+00:00

tc code implicitly considers skb->protocol even in case of accelerated
vlan paths and expects vlan protocol type here. However, on rx path,
if the vlan header was already stripped, skb->protocol contains value
of next header. Similar situation is on tx path.

So for skbs that use skb->vlan_tci for tagging, use skb->vlan_proto instead.

Reported-by: Jamal Hadi Salim 
Signed-off-by: Jiri Pirko 
Acked-by: Jamal Hadi Salim 
Signed-off-by: David S. Miller

net: sched: remove tcf_proto from ematch calls

2014-10-06T22:02:32+00:00

This removes the tcf_proto argument from the ematch code paths that
only need it to reference the net namespace. This allows simplifying
qdisc code paths especially when we need to tear down the ematch
from an RCU callback. In this case we can not guarentee that the
tcf_proto structure is still valid.

Signed-off-by: John Fastabend 
Acked-by: Cong Wang 
Signed-off-by: David S. Miller

net: Change skb_get_rxhash to skb_get_hash

2013-12-17T21:36:21+00:00

Changing name of function as part of making the hash in skbuff to be
generic property, not just for receive path.

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

net_sched: expand control flow of macro SKIP_NONLOCAL

2013-12-11T17:29:26+00:00

SKIP_NONLOCAL hides the control flow. The control flow should be
inlined and expanded explicitly in code so that someone who reads
it can tell the control flow can be changed by the statement.

Signed-off-by: Yang Yingliang 
Signed-off-by: David S. Miller

qdisc: meta return ENOMEM on alloc failure

2013-09-30T19:47:43+00:00

Rather than returning earlier value (EINVAL), return ENOMEM if
kzalloc fails. Found while reviewing to find another EINVAL condition.

Signed-off-by: Stephen Hemminger 
Acked-by: Thomas Graf 
Signed-off-by: David S. Miller

net: use a per task frag allocator

2012-09-24T20:31:37+00:00

We currently use a per socket order-0 page cache for tcp_sendmsg()
operations.

This page is used to build fragments for skbs.

Its done to increase probability of coalescing small write() into
single segments in skbs still in write queue (not yet sent)

But it wastes a lot of memory for applications handling many mostly
idle sockets, since each socket holds one page in sk->sk_sndmsg_page

Its also quite inefficient to build TSO 64KB packets, because we need
about 16 pages per skb on arches where PAGE_SIZE = 4096, so we hit
page allocator more than wanted.

This patch adds a per task frag allocator and uses bigger pages,
if available. An automatic fallback is done in case of memory pressure.

(up to 32768 bytes per frag, thats order-3 pages on x86)

This increases TCP stream performance by 20% on loopback device,
but also benefits on other network devices, since 8x less frags are
mapped on transmit and unmapped on tx completion. Alexander Duyck
mentioned a probable performance win on systems with IOMMU enabled.

Its possible some SG enabled hardware cant cope with bigger fragments,
but their ndo_start_xmit() should already handle this, splitting a
fragment in sub fragments, since some arches have PAGE_SIZE=65536

Successfully tested on various ethernet devices.
(ixgbe, igb, bnx2x, tg3, mellanox mlx4)

Signed-off-by: Eric Dumazet 
Cc: Ben Hutchings 
Cc: Vijay Subramanian 
Cc: Alexander Duyck 
Tested-by: Vijay Subramanian 
Signed-off-by: David S. Miller

ipv4: Prepare for change of rt->rt_iif encoding.

2012-07-23T23:36:26+00:00

Use inet_iif() consistently, and for TCP record the input interface of
cached RX dst in inet sock.

rt->rt_iif is going to be encoded differently, so that we can
legitimately cache input routes in the FIB info more aggressively.

When the input interface is "use SKB device index" the rt->rt_iif will
be set to zero.

This forces us to move the TCP RX dst cache installation into the ipv4
specific code, and as well it should since doing the route caching for
ipv6 is pointless at the moment since it is not inspected in the ipv6
input paths yet.

Also, remove the unlikely on dst->obsolete, all ipv4 dsts have
obsolete set to a non-zero value to force invocation of the check
callback.

Signed-off-by: David S. Miller

pkt_sched: Stop using NLA_PUT*().

2012-04-01T22:11:37+00:00

These macros contain a hidden goto, and are thus extremely error
prone and make code hard to audit.

Signed-off-by: David S. Miller

net: remove SK_ROUTE_CAPS from meta ematch

2011-07-14T21:45:59+00:00

Remove it, as it indirectly exposes netdev features. It's not used in
iproute2 (2.6.38) - is anything else using its interface?

Signed-off-by: Michał Mirosław 
Signed-off-by: David S. Miller