[Xen-devel] [PATCH 2/2] Use ip for bridge related functions where brctl is not present

[Steven Haigh <netwiz@xxxxxxxxx>]

Signed-off-by: Steven Haigh <netwiz@xxxxxxxxx>
---
 tools/hotplug/Linux/colo-proxy-setup      | 30 +++++++++++++++++------
 tools/hotplug/Linux/vif-bridge            | 19 ++++++++------
 tools/hotplug/Linux/vif2                  | 12 +++++++--
 tools/hotplug/Linux/xen-network-common.sh | 15 +++++++++---
 4 files changed, 55 insertions(+), 21 deletions(-)

diff --git a/tools/hotplug/Linux/colo-proxy-setup 
b/tools/hotplug/Linux/colo-proxy-setup
index 94e2034452..cbd5b773c6 100755
--- a/tools/hotplug/Linux/colo-proxy-setup
+++ b/tools/hotplug/Linux/colo-proxy-setup
@@ -76,10 +76,17 @@ function teardown_primary()
 
 function setup_secondary()
 {
-    do_without_error brctl delif $bridge $vifname
-    do_without_error brctl addbr $forwardbr
-    do_without_error brctl addif $forwardbr $vifname
-    do_without_error brctl addif $forwardbr $forwarddev
+    if [ -x "/usr/sbin/brctl" ]; then
+        do_without_error brctl delif $bridge $vifname
+        do_without_error brctl addbr $forwardbr
+        do_without_error brctl addif $forwardbr $vifname
+        do_without_error brctl addif $forwardbr $forwarddev
+    else
+        do_without_error ip link set $vifname nomaster
+        do_without_error ip link add name $forwardbr type bridge
+        do_without_error ip link set $vifname master $forwardbr
+        do_without_error ip link set $forwarddev master $forwardbr
+    fi
     do_without_error ip link set dev $forwardbr up
     do_without_error modprobe xt_SECCOLO
 
@@ -91,10 +98,17 @@ function setup_secondary()
 
 function teardown_secondary()
 {
-    do_without_error brctl delif $forwardbr $forwarddev
-    do_without_error brctl delif $forwardbr $vifname
-    do_without_error brctl delbr $forwardbr
-    do_without_error brctl addif $bridge $vifname
+    if [ -x "/usr/sbin/brctl" ]; then
+        do_without_error brctl delif $forwardbr $forwarddev
+        do_without_error brctl delif $forwardbr $vifname
+        do_without_error brctl delbr $forwardbr
+        do_without_error brctl addif $bridge $vifname
+    else
+        do_without_error ip link set $forwarddev nomaster
+        do_without_error ip link set $vifname nomaster
+        do_without_error ip link delete $forwardbr type bridge
+        do_without_error ip link set $vifname master $bridge
+    fi
 
     do_without_error iptables -t mangle -D PREROUTING -m physdev --physdev-in \
         $vifname -j SECCOLO --index $index
diff --git a/tools/hotplug/Linux/vif-bridge b/tools/hotplug/Linux/vif-bridge
index 6956dea66a..e035411934 100644
--- a/tools/hotplug/Linux/vif-bridge
+++ b/tools/hotplug/Linux/vif-bridge
@@ -31,12 +31,13 @@ dir=$(dirname "$0")
 bridge=${bridge:-}
 bridge=$(xenstore_read_default "$XENBUS_PATH/bridge" "$bridge")
 
-if [ -z "$bridge" ]
-then
-  bridge=$(brctl show | awk 'NR==2{print$1}')
-
-  if [ -z "$bridge" ]
-  then
+if [ -z "$bridge" ]; then
+    if [ -x "/usr/sbin/brctl" ]; then
+        bridge=$(brctl show | awk 'NR==2{print$1}')
+    else
+        bridge=$(bridge link | cut -d" " -f7)
+    fi
+  if [ -z "$bridge" ]; then
      fatal "Could not find bridge, and none was specified"
   fi
 else
@@ -82,7 +83,11 @@ case "$command" in
         ;;
 
     offline)
-        do_without_error brctl delif "$bridge" "$dev"
+        if [ -x "/usr/sbin/brctl"]; then
+            do_without_error brctl delif "$bridge" "$dev"
+        else
+            do_without_error ip link set "$dev" nomaster
+        fi
         do_without_error ifconfig "$dev" down
         ;;
 
diff --git a/tools/hotplug/Linux/vif2 b/tools/hotplug/Linux/vif2
index 2c155be68c..e36070cbbb 100644
--- a/tools/hotplug/Linux/vif2
+++ b/tools/hotplug/Linux/vif2
@@ -7,13 +7,21 @@ dir=$(dirname "$0")
 bridge=$(xenstore_read_default "$XENBUS_PATH/bridge" "$bridge")
 if [ -z "$bridge" ]
     then
-    nr_bridges=$(($(brctl show | cut -f 1 | grep -v "^$" | wc -l) - 1))
+    if [ -x "/usr/sbin/brctl" ]; then
+        nr_bridges=$(($(brctl show | cut -f 1 | grep -v "^$" | wc -l) - 1))
+    else
+        nr_bridges=$(bridge link | wc -l)
+    fi
     if [ "$nr_bridges" != 1 ]
        then
        fatal "no bridge specified, and don't know which one to use 
($nr_bridges found)"
     fi
-    bridge=$(brctl show | cut -d "
+    if [ -x "/usr/sbin/brctl" ]; then
+        bridge=$(brctl show | cut -d "
 " -f 2 | cut -f 1)
+    else
+        bridge=$(bridge link | cut -d" " -f6)
+    fi
 fi
 
 command="$1"
diff --git a/tools/hotplug/Linux/xen-network-common.sh 
b/tools/hotplug/Linux/xen-network-common.sh
index ab76827a64..7833deac6c 100644
--- a/tools/hotplug/Linux/xen-network-common.sh
+++ b/tools/hotplug/Linux/xen-network-common.sh
@@ -108,9 +108,12 @@ create_bridge () {
 
        # Don't create the bridge if it already exists.
        if [ ! -e "/sys/class/net/${bridge}/bridge" ]; then
-               brctl addbr ${bridge}
-               brctl stp ${bridge} off
-               brctl setfd ${bridge} 0
+               if [ -x "/usr/sbin/brctl" ]; then
+                       brctl addbr ${bridge}
+                       brctl stp ${bridge} off
+                       brctl setfd ${bridge} 0
+               else
+                       ip link add name ${bridge} type bridge stp_state 0 
forward_delay 0
        fi
 }
 
@@ -124,7 +127,11 @@ add_to_bridge () {
                ip link set dev ${dev} up || true
                return
        fi
-       brctl addif ${bridge} ${dev}
+       if [ -x "/usr/sbin/brctl" ]; then
+               brctl addif ${bridge} ${dev}
+       else
+               ip link set ${dev} master ${bridge}
+       fi
        ip link set dev ${dev} up
 }
 
-- 
2.24.1


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