This change allows to exec some cmd on each
named netns (except default) by specifying '-all' option:

    # ip -all netns exec ip link

Each command executes synchronously.

Exit status is not considered, so there might be a case
that some CMD can fail on some netns but success on the other.

EXAMPLES:

1) Show link info on all netns:

$ ip -all netns exec ip link

netns: test_net
1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN mode DEFAULT group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
4: tap0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 500
    link/ether 1a:19:6f:25:eb:85 brd ff:ff:ff:ff:ff:ff

netns: home0
1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN mode DEFAULT group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
4: tap0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 500
    link/ether ea:1a:59:40:d3:29 brd ff:ff:ff:ff:ff:ff

netns: lan0
1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN mode DEFAULT group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
4: tap0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 500
    link/ether ce:49:d5:46:81:ea brd ff:ff:ff:ff:ff:ff

2) Set UP tap0 device for the all netns:

$ ip -all netns exec ip link set dev tap0 up

netns: test_net

netns: home0

netns: lan0
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Added possibility to run some func on each netns.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Sanitized header from upstream 3.20-rc kernel

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Added two tests which checks the following fixed issues:

    1) Bug when not possible add new virtual interface via:

        $ ip link add dev XXX type

       It was fixed a few releases ago.

    2) Crash on older kernels when VF rate info does not exist:

        $ ip link show

       Used dump file from William Dauchy <william@gandi.net>:
           testsuite/tests/ip/link/dev_wo_vf_rate.nl

       So 'ip link show' replaced by 'ip -d monitor file ...' which does
       the same thing.

Also added new func in testsuite/lib/generic.sh to gen new random dev name.

Added 'clean' dependency on running all tests.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

As inet dgram sockets (udp, raw) can call connect(...)  - they
might be set in ESTABLISHED state. So keep the original behaviour of
'ss' which filtered them by ESTABLISHED state by default. So:

    $ ss -u

    or

    $ ss -w

Will show only ESTABLISHED UDP sockets by default.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

When HAVE_SETNS is not set, iproute2 provides a local implementation of this
function based on __NR_setns.
This macro is defined in sys/syscall.h, which was not included, thus the local
implementation always returned -1.

CC: Vadim Kochan <vadim4j@gmail.com>
Fixes: eb67e449 ("lib: Add netns_switch func for change network namespace")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>

Warning was:
In file included from bridge.c:16:0:
../include/namespace.h:33:12: warning: ‘setns’ defined but not used [-Wunused-function]

CC: Vadim Kochan <vadim4j@gmail.com>
Fixes: eb67e449 ("lib: Add netns_switch func for change network namespace")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>

In the ip-link(8) man page, for the gretap, ip6gre, and ip6gretap types, the
word tunnel was incorrectly spelled 'tuunel'.
Signed-off-by: Reese Moore <ram@vt.edu>

Need to check for invalid address and buffer overrun in ip neigh
command with invalid paramters.

Renamed get_netns_fd -> netns_get_fd and moved to
lib/namespace.c
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Add #define for nlmsg_type = 15
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

When 'ss' prints UDP sockets info together with RAW sockets
e.g.:

    $ ss -a

then UDP sockets are resolved as "ipproto-xxx".

It was caused that dg_proto was set after printing UDP
socket info from netlink. So fixed issue by moving
setting dg_proto before printing info from Netlink.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

The issue was caused that ifla_vf_rate does not exist on
older kernels and should be checked if it exists as nested attr.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Reported-by: William Dauchy <william@gandi.net>
Tested-by: William Dauchy <william@gandi.net>

When specified in a graph such as:
action vlan ... action foobar
the vlan action chewed more than it can swallow
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>

addrgenmode is currently write only by ip. So display this information
if provided by kernel as well.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>

This patch fixes some filtering combinations issues which does not
work on the 'master' version:

    $ ss -4
    shows inet & unix sockets, instead of only inet sockets

    $ ss -u
    needs to specify 'state closed'

    $ ss src unix:*X11*
    needs to specify '-x' shortcut for UNIX family

    $ ss -A all
    shows only sockets with established states

There might some other issues which was not observed.

Also changed logic for calculating families, socket types and
states filtering. I think that this version is a little simpler
one. Now there are 2 predefined default tables which describes
the following maping:

    family  -> (states, dbs)
    db      -> (states, families)
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Refactored to use one func for output packet stats info
from both /proc and netlink.

Added possibility to get packet stats info from /proc
by setting environment variable PROC_ROOT or PROC_NET_PACKET.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Refactored to use one func for output unix stats info
from both /proc and netlink.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Sometimes, it is more convenient to get only one specific nested attribute by
type. For example for IFLA_AF_SPEC where type is address family (AF_INET6).
So add this helper for this purpose.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>

Suggested by Vadim Kochan

v2:

Resending now that the dust has cleared in 3.18 on "self" vs. hwmode debate for
brport settings.  learning_sync is now set/cleared using "self" qualifier on
brport.

v1:

Add 'learned_sync' flag to turn on/off syncing of learned MAC addresses from
offload device to bridge's FDB.   Flag is be set/cleared on offload device port
using "self" qualifier:

  $ sudo bridge link set dev swp1 learning_sync on self

  $ bridge -d link show dev swp1
  2: swp1 state UNKNOWN : <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0 state forwarding priority 32 cost 2
      hairpin off guard off root_block off fastleave off learning off flood off
  2: swp1 state UNKNOWN : <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br0
      learning on learning_sync on

Adds new IFLA_BRPORT_LEARNED_SYNCED attribute for IFLA_PROTINFO on the SELF
brport.
Signed-off-by: Scott Feldman <sfeldma@gmail.com>

Stolen from generated doc/ss.html
Also added reference to RFC 793 for TCP states.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Fixed -t[short] to -ts[hort] as '-t' is related to
-timestamp option.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Added new '-netns' option to simplify executing following cmd:

    ip netns exec NETNS tc OPTIONS COMMAND OBJECT

    to

    tc -n[etns] NETNS OPTIONS COMMAND OBJECT

e.g.:

    tc -net vnet0 qdisc
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>

Added new '-netns' option to simplify executing following cmd:

    ip netns exec NETNS bridge OPTIONS COMMAND OBJECT

    to

    bridge -n[etns] NETNS OPTIONS COMMAND OBJECT

e.g.:

    bridge -net vnet0 fdb
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>

Added new '-netns' option to simplify executing following cmd:

    ip netns exec NETNS ip OPTIONS COMMAND OBJECT

    to

    ip -n[etns] NETNS OPTIONS COMMAND OBJECT

e.g.:

    ip -net vnet0 link add br0 type bridge
    ip -n vnet0 link
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>

New netns_switch func moved to the lib/namespace.c from ip/ipnetns.c
so it can be used from the other tools for fast switching
network namespace.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>

Just another refactoring for ss to use rtnl API from lib
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Added new '-g[raph]' option which shows classes in the graph view.

Meanwhile only generic stats info output is supported.

e.g.:

$ tc/tc -g class show dev tap0
+---(1:2) htb rate 6Mbit ceil 6Mbit burst 15Kb cburst 1599b
|    +---(1:40) htb prio 0 rate 5Mbit ceil 5Mbit burst 15Kb cburst 1600b
|    +---(1:50) htb rate 3Mbit ceil 6Mbit burst 15Kb cburst 1599b
|    |    +---(1:51) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b
|    |
|    +---(1:60) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b
|
+---(1:1) htb rate 6Mbit ceil 6Mbit burst 15Kb cburst 1599b
     +---(1:10) htb prio 0 rate 5Mbit ceil 5Mbit burst 15Kb cburst 1600b
     +---(1:20) htb prio 0 rate 3Mbit ceil 6Mbit burst 15Kb cburst 1599b
     +---(1:30) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b

$ tc/tc -g -s class show dev tap0
+---(1:2) htb rate 6Mbit ceil 6Mbit burst 15Kb cburst 1599b
|    |    Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
|    |    rate 0bit 0pps backlog 0b 0p requeues 0
|    |
|    +---(1:40) htb prio 0 rate 5Mbit ceil 5Mbit burst 15Kb cburst 1600b
|    |          Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
|    |          rate 0bit 0pps backlog 0b 0p requeues 0
|    |
|    +---(1:50) htb rate 3Mbit ceil 6Mbit burst 15Kb cburst 1599b
|    |    |     Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
|    |    |     rate 0bit 0pps backlog 0b 0p requeues 0
|    |    |
|    |    +---(1:51) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b
|    |               Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
|    |               rate 0bit 0pps backlog 0b 0p requeues 0
|    |
|    +---(1:60) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b
|               Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
|               rate 0bit 0pps backlog 0b 0p requeues 0
|
+---(1:1) htb rate 6Mbit ceil 6Mbit burst 15Kb cburst 1599b
     |    Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
     |    rate 0bit 0pps backlog 0b 0p requeues 0
     |
     +---(1:10) htb prio 0 rate 5Mbit ceil 5Mbit burst 15Kb cburst 1600b
     |          Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
     |          rate 0bit 0pps backlog 0b 0p requeues 0
     |
     +---(1:20) htb prio 0 rate 3Mbit ceil 6Mbit burst 15Kb cburst 1599b
     |          Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
     |          rate 0bit 0pps backlog 0b 0p requeues 0
     |
     +---(1:30) htb prio 0 rate 1Kbit ceil 6Mbit burst 15Kb cburst 1599b
                Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
                rate 0bit 0pps backlog 0b 0p requeues 0
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

Extend "ip-address" man page to reflect the recent extension of
allowing to list addresses with flags tentative, deprecated, dadfailed
not being set.
Signed-off-by: Heiner Kallweit <heiner.kallweit@web.de>

Currently self is set internally only if hwmode is set.
This makes it necessary for the hw to have a mode.
There is no hwmode really required to go to hardware. So, introduce
self for anybody who wants to target hardware.

v1 -> v2
    - fix a few bugs. Initialize flags to zero: this was required to
    keep the current behaviour unchanged.

v2 -> v3
    - fix comment
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Reviewed-by: Jiri Pirko <jiri@resnulli.us>

Use addattr_nest() and addattr_nest_end() to simplify the code.
Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>