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https://github.com/xen-project/xen.git
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Jan Beulich
b11910082d
We're not after any "fall-through" behavior here. Replace the constructs with ones understood by all conforming shells, including older bash (problem observed with 3.1.51(1)). Fixes:b51715f02b("tools/hotplug/Linux: remove code duplication in vif-bridge") Fixes:3683290fc0("tools/hotplug: only attempt to call 'ip route' if there is valid command") Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Paul Durrant <paul@xen.org> Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com> Acked-by: Wei Liu <wl@xen.org>
99 lines
2.5 KiB
Bash
99 lines
2.5 KiB
Bash
#!/bin/bash
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#============================================================================
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# ${XEN_SCRIPT_DIR}/vif-bridge
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#
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# Script for configuring a vif in bridged mode.
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#
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# Usage:
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# vif-bridge (add|remove|online|offline)
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#
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# Environment vars:
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# vif vif interface name (required).
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# XENBUS_PATH path to this device's details in the XenStore (required).
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#
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# Read from the store:
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# bridge bridge to add the vif to (optional). Defaults to searching for the
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# bridge itself.
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# ip list of IP networks for the vif, space-separated (optional).
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#
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# up:
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# Enslaves the vif interface to the bridge and adds iptables rules
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# for its ip addresses (if any).
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#
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# down:
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# Removes the vif interface from the bridge and removes the iptables
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# rules for its ip addresses (if any).
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#============================================================================
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dir=$(dirname "$0")
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. "$dir/vif-common.sh"
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bridge=${bridge:-}
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bridge=$(xenstore_read_default "$XENBUS_PATH/bridge" "$bridge")
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if [ -z "$bridge" ]; then
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if which brctl >&/dev/null; then
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bridge=$(brctl show | awk 'NR==2{print$1}')
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else
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bridge=$(bridge link | cut -d" " -f7)
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fi
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if [ -z "$bridge" ]
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then
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fatal "Could not find bridge, and none was specified"
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fi
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else
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#
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# Old style bridge setup with netloop, used to have a bridge name
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# of xenbrX, enslaving pethX and vif0.X, and then configuring
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# eth0.
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#
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# New style bridge setup does not use netloop, so the bridge name
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# is ethX and the physical device is enslaved pethX
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#
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# So if...
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#
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# - User asks for xenbrX
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# - AND xenbrX doesn't exist
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# - AND there is a ethX device which is a bridge
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#
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# ..then we translate xenbrX to ethX
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#
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# This lets old config files work without modification
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#
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if [ ! -e "/sys/class/net/$bridge" ] && [ -z "${bridge##xenbr*}" ]
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then
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if [ -e "/sys/class/net/eth${bridge#xenbr}/bridge" ]
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then
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bridge="eth${bridge#xenbr}"
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fi
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fi
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fi
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RET=0
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ip link show dev "$bridge" 1>/dev/null 2>&1 || RET=1
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if [ "$RET" -eq 1 ]
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then
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fatal "Could not find bridge device $bridge"
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fi
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case "$command" in
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add|online)
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setup_virtual_bridge_port "$dev"
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set_mtu "$bridge" "$dev" "$type_if"
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add_to_bridge "$bridge" "$dev"
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;;
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remove|offline)
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remove_from_bridge "$bridge" "$dev"
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;;
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esac
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handle_iptable
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call_hooks vif post
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log debug "Successful vif-bridge $command for $dev, bridge $bridge."
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if [ "$type_if" = vif -a "$command" = "online" ]
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then
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success
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fi
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