From: Paul Durrant <paul@xen.org>
To: xen-devel@lists.xenproject.org
Cc: Paul Durrant <pdurrant@amazon.com>,
Ian Jackson <ian.jackson@eu.citrix.com>, Wei Liu <wl@xen.org>
Subject: [PATCH v2 4/4] tools/hotplug: modify set_mtu() to inform the frontend via xenstore
Date: Mon, 3 Aug 2020 13:49:31 +0100 [thread overview]
Message-ID: <20200803124931.2678-5-paul@xen.org> (raw)
In-Reply-To: <20200803124931.2678-1-paul@xen.org>
From: Paul Durrant <pdurrant@amazon.com>
set_mtu() currently sets the backend vif MTU but does not inform the frontend
what it is. This patch adds code to write the MTU into a xenstore node. See
netif.h for a specification of the node.
NOTE: There is also a small modification replacing '$mtu' with '${mtu}'
for style consistency.
Signed-off-by: Paul Durrant <pdurrant@amazon.com>
---
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Wei Liu <wl@xen.org>
---
tools/hotplug/Linux/vif-bridge | 2 +-
tools/hotplug/Linux/xen-network-common.sh | 14 +++++++++++++-
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/tools/hotplug/Linux/vif-bridge b/tools/hotplug/Linux/vif-bridge
index e1d7c49788..b99cc82a21 100644
--- a/tools/hotplug/Linux/vif-bridge
+++ b/tools/hotplug/Linux/vif-bridge
@@ -81,7 +81,7 @@ case "$command" in
;&
online)
setup_virtual_bridge_port "$dev"
- set_mtu "$bridge" "$dev"
+ set_mtu "$bridge" "$dev" "$type_if"
add_to_bridge "$bridge" "$dev"
;;
remove)
diff --git a/tools/hotplug/Linux/xen-network-common.sh b/tools/hotplug/Linux/xen-network-common.sh
index 37e71cfa9c..24fc42d9cf 100644
--- a/tools/hotplug/Linux/xen-network-common.sh
+++ b/tools/hotplug/Linux/xen-network-common.sh
@@ -164,9 +164,21 @@ remove_from_bridge () {
set_mtu () {
local bridge=$1
local dev=$2
+ local type_if=$3
+
mtu="`ip link show dev ${bridge}| awk '/mtu/ { print $5 }'`"
if [ -n "$mtu" ] && [ "$mtu" -gt 0 ]
then
- ip link set dev ${dev} mtu $mtu || :
+ ip link set dev ${dev} mtu ${mtu} || :
+ fi
+
+ if [ ${type_if} = vif ]
+ then
+ dev_=${dev#vif}
+ domid=${dev_%.*}
+ devid=${dev_#*.}
+
+ XENBUS_PATH="/local/domain/$domid/device/vif/$devid"
+ xenstore_write "$XENBUS_PATH/mtu" ${mtu}
fi
}
--
2.20.1
next prev parent reply other threads:[~2020-08-03 12:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-03 12:49 [PATCH v2 0/4] tools: propagate bridge MTU to vif frontends Paul Durrant
2020-08-03 12:49 ` [PATCH v2 1/4] tools/hotplug: add remove_from_bridge() and improve debug output Paul Durrant
2020-08-04 11:06 ` Ian Jackson
2020-08-03 12:49 ` [PATCH v2 2/4] tools/hotplug: combine add/online and remove/offline in vif-bridge Paul Durrant
2020-08-04 11:08 ` Ian Jackson
2020-08-03 12:49 ` [PATCH v2 3/4] public/io/netif: specify MTU override node Paul Durrant
2020-08-04 11:10 ` Ian Jackson
2020-08-03 12:49 ` Paul Durrant [this message]
2020-08-04 11:13 ` [PATCH v2 4/4] tools/hotplug: modify set_mtu() to inform the frontend via xenstore Ian Jackson
2020-08-04 11:20 ` Paul Durrant
2020-08-04 11:35 ` Ian Jackson
2020-08-04 13:31 ` Paul Durrant
2020-08-05 9:30 ` Ian Jackson
2020-08-05 9:44 ` Durrant, Paul
2020-08-05 10:13 ` Ian Jackson
2020-08-05 10:42 ` Durrant, Paul
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