# OVS_KMOD_VSWITCHD_START([vsctl-args], [vsctl-output], [=override])
#
# Creates a database and starts ovsdb-server, starts ovs-vswitchd
# connected to that database, calls ovs-vsctl to create a bridge named
# br0 with predictable settings, passing 'vsctl-args' as additional
# commands to ovs-vsctl.  If 'vsctl-args' causes ovs-vsctl to provide
# output (e.g. because it includes "create" commands) then 'vsctl-output'
# specifies the expected output after filtering through uuidfilt.pl.
#
m4_define([OVS_KMOD_VSWITCHD_START],
  [ AT_CHECK([modprobe openvswitch])
    ON_EXIT([modprobe -r openvswitch])
   _OVS_VSWITCHD_START([])
   dnl Add bridges, ports, etc.
   AT_CHECK([ovs-vsctl -- add-br br0 -- set bridge br0 protocols=[[OpenFlow10,OpenFlow11,OpenFlow12,OpenFlow13,OpenFlow14,OpenFlow15]] fail-mode=secure -- $1 m4_if([$2], [], [], [| ${PERL} $srcdir/uuidfilt.pl])], [0], [$2])
])
#
#
# OVS_KMOD_VSWITCHD_STOP([WHITELIST], [extra_cmds])
#
# Gracefully stops ovs-vswitchd and ovsdb-server, checking their log files
# for messages with severity WARN or higher and signaling an error if any
# is present.  The optional WHITELIST may contain shell-quoted "sed"
# commands to delete any warnings that are actually expected, e.g.:
#
#   OVS_KMOD_VSWITCHD_STOP(["/expected error/d"])
#
# 'extra_cmds' are shell commands to be executed afte OVS_VSWITCHD_STOP() is
# invoked. They can be used to perform additional cleanups such as name space
# removal.
m4_define([OVS_KMOD_VSWITCHD_STOP],
  [AT_CHECK([ovs-vsctl del-br br0])
   OVS_VSWITCHD_STOP([$1])
   AT_CHECK([:; $2])
   AT_CHECK([modprobe -r openvswitch])
  ])

# DEL_NAMESPACES(ns [, ns ... ])
#
# Delete namespaces from the running OS
m4_define([DEL_NAMESPACES],
   [m4_foreach([ns], [$@],
               [ip netns del ns
])
   ]
)
#
# ADD_NAMESPACES(ns [, ns ... ])
#
# Add new namespaces, if ns exists, the old one
# will be remove before new ones are installed.
m4_define([ADD_NAMESPACES],
   [m4_foreach([ns], [$@],
               [DEL_NAMESPACES(ns)
                AT_CHECK([ip netns add ns])
                ON_EXIT(DEL_NAMESPACES(ns))
               ])
   ]
)

# ADD_VETH([port], [namespace], [ovs-br], [ip_addr])
#
# Add a pair of veth ports. 'port' will be added to name space 'namespace',
# and "ovs-'port'" will be added to ovs bridge 'ovs-br'.
#
# The 'port' in 'namespace' will be brought up with static IP address
# with 'ip_addr' in CIDR notation.
#
# The existing 'port' or 'ovs-port' will be removed before new ones are added.
#
m4_define([ADD_VETH],
    [ AT_CHECK([ip link add $1 type veth peer name ovs-$1])
      AT_CHECK([ip link set $1 netns $2])
      AT_CHECK([ovs-vsctl add-port $3 ovs-$1])
      AT_CHECK([ip link set dev ovs-$1 up])
      AT_CHECK([ip netns exec $2 ip addr add $4 dev $1])
      AT_CHECK([ip netns exec $2 ip link set dev $1 up])
    ]
)