Some qdisc like htb want the parse_qopt to be called even if no options
present. Fixes regression caused by:

e9e78b0d is the first bad commit
commit e9e78b0d
Author: Stephen Hemminger <stephen@networkplumber.org>
Date:   Mon Aug 26 08:41:19 2013 -0700

    tc: allow qdisc without options

macvtap and vti were missing.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>

ip xfrm considers that the user-defined mark is "any" as soon as
(mark.v & mark.m == 0), which prevents from specifying non-wildcard
marks that include the value 0 (typically 0/0xffffffff).

Yet, matching exactly mark 0 is useful for instance to separate
vti policies from global policies.

Always configure the user mark if mark.m != 0.
Signed-off-by: Christophe Gouault <christophe.gouault@6wind.com>

Update man pages with ip6gre info.
Signed-off-by: Dmitry Kozlov <xeb@mail.ru>

GRE over IPv6 tunnel support.
Signed-off-by: Dmitry Kozlov <xeb@mail.ru>

If you taketh you giveth.
I Went the LinuxWay and copied this for m_simple.c and noticed
this one typo (I wonder where it came from?;->).
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>

Simple action is already in the kernel for years now as an
example. This complements it with user space control.
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>

This bug is reported from below link:
https://bugzilla.redhat.com/show_bug.cgi?id=982761

An simplified command from its original reproducing method in bugzilla:
ip xfrm state add src 10.0.0.2 dst 10.0.0.1 proto ah spi 0x12345678 auth md5 12
will cause below spew from gcc.
Reported-by: Sohny Thomas <sthomas@linux.vnet.ibm.com>

The `bridge monitor file FILENAME' reads dumped netlink messages from
a file. But it forgot to close the file after using it. This patch
fixes it.
Signed-off-by: Petr Písař <ppisar@redhat.com>

New json option

Also add long options

TCA_HTB_DIRECT_QLEN attribute is supported since linux-3.10

HTB classes use an internal pfifo queue, which limit was not reported
by tc, and value inherited from device tx_queue_len at setup time.

With this patch, tc displays the value and can change it.
Signed-off-by: Eric Dumazet <edumazet@google.com>

Since linux-3.11, rate estimator can provide TCA_STATS_RATE_EST64
when rate (bytes per second) is above 2^32 (~34 Mbits)

Change tc to use this attribute for high rates.
Signed-off-by: Eric Dumazet <edumazet@google.com>

This augments bridge(8) manual page with `bridge mdb' and `bridge
monitor mdb' commands which have been added recently.
Signed-off-by: Petr Písař <ppisar@redhat.com>

Support for FQ packet scheduler

$ tc qd add dev eth0 root fq help
Usage: ... fq [ limit PACKETS ] [ flow_limit PACKETS ]
              [ quantum BYTES ] [ initial_quantum BYTES ]
              [ maxrate RATE  ] [ buckets NUMBER ]
              [ [no]pacing ]

$ tc -s -d qd
qdisc fq 8002: dev eth0 root refcnt 32 limit 10000p flow_limit 100p
buckets 256 quantum 3028 initial_quantum 15140
 Sent 216532416 bytes 148395 pkt (dropped 0, overlimits 0 requeues 14)
 backlog 0b 0p requeues 14
  511 flows (511 inactive, 0 throttled)
  110 gc, 0 highprio, 0 retrans, 1143 throttled, 0 flows_plimit

limit	: max number of packets on whole Qdisc (default 10000)

flow_limit : max number of packets per flow (default 100)

quantum : the max deficit per RR round (default is 2 MTU)

initial_quantum : initial credit for new flows (default is 10 MTU)

maxrate : max per flow rate (default : unlimited)

buckets : number of RB trees (default : 1024) in hash table.
               (consumes 8 bytes per bucket)

[no]pacing : disable/enable pacing (default is enable)

Usage :

tc qdisc add dev $ETH root fq

tc qdisc del dev $ETH root 2>/dev/null
tc qdisc add dev $ETH root handle 1: mq
for i in `seq 1 4`
do
  tc qdisc add dev $ETH parent 1:$i est 1sec 4sec fq
done
Signed-off-by: Eric Dumazet <edumazet@google.com>

New command line flag to output statistics in JSON format.
In our envrionment, we have scripts that parse output of commands.
It is better to use a format supported by existing parsers.

This iproute2 tc patch is connected to the kernel
 - commit 8a8e3d84b17 (net_sched: restore "linklayer atm" handling)

The rate table calculated by tc, have gotten replaced in the kernel
and is no-longer used for lookups.

This happened in kernel release v3.8 caused by kernel
 - commit 56b765b79 ("htb: improved accuracy at high rates").
This change unfortunately caused breakage of tc overhead and
linklayer parameters.

 Kernel overhead handling got fixed in kernel v3.10 by
 - commit 01cb71d2d47 (net_sched: restore "overhead xxx" handling)

 Kernel linklayer handling got fixed in kernel v3.11 by
 - commit 8a8e3d84b17 (net_sched: restore "linklayer atm" handling)

The linklayer fix introduced a struct change, that allow the linklayer
attribute to be transferred between tc and kernel. This patch make use
of this linklayer attribute.

The linklayer setting is transfer to the kernel.  And linklayer
setting received from the kernel is printed with a prefixed
"linklayer" when listing current configuration.  The default
TC_LINKLAYER_ETHERNET is only printed in detailed output mode.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>

Since commit a05f6511, ip batch mode is broken when using 'netns exec' cmd.

When WIFEXITED() returns true, it means that the child exited normally, hence
we must not call exit() but just returns the status. If we call exit, the next
commands in the file file are not executed.
If WIFEXITED() returns false, we can call exit() because it means that the
child failed.

This patch partially reverts commit a05f6511.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>

Last minute addition to pkt_sched.h

The git-commit dc8867d0, that added support for displaying the
extra-flags of a state, introduced a potential segfault.
Trying to show a state without the extra-flag attribute and show_stats
enabled, would cause the NULL pointer in tb[XFRMA_SA_EXTRA_FLAGS] to be
dereferenced.
Signed-off-by: Thomas Egerer <thomas.egerer@secunet.com>

The mode information is contained in IFLA_MACVLAN_MODE instead
of IFLA_VLAN_ID (both evaluating to "1" in their enums).
Signed-off-by: Lutz Jaenicke <ljaenicke@innominate.com>

In SYNOPSIS section:

 - Add 'reordering'
 - Add missing '[' before 'quickack'
Signed-off-by: Richard Godbee <richard@godbee.net>

Signed-off-by: Richard Godbee <richard@godbee.net>

Fix two spacing problems around square brackets in usage text.
Signed-off-by: Richard Godbee <richard@godbee.net>

Useful to be able to monitor arp and IPv6 nd seperately.
Default is both.

Pfifo_fast needs no options. So don't force it to have parsing code.

Prefix labelling is currently only activated when monitoring "all"
objects.  However, the output can still be confusing when monitoring
more than 1 object, so add an option to always print prefix labels.
Signed-off-by: Martin Schwenke <martin@meltin.net>

Minor errors found by codespell

Split it naturally