287 lines
8.4 KiB
Plaintext
287 lines
8.4 KiB
Plaintext
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#!/bin/sh
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[ "$VERBOSITY" = 1 ] && set -x
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[ "$ADDRFAM" = meta ] && exit 0
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add_master()
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{
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# Return if $BOND_MASTER is already a bonding interface.
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[ -f "/sys/class/net/$BOND_MASTER/bonding/slaves" ] && return
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# If the bonding module is not yet loaded, load it.
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if [ ! -r /sys/class/net/bonding_masters ]; then
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modprobe -q bonding
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FAILED=1
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echo "Waiting for bonding kernel module to be ready (will timeout after 5s)"
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count=0
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while [ "$count" -lt "50" ]; do
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if [ -r /sys/class/net/bonding_masters ]; then
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FAILED=0
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break
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fi
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sleep 0.1
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count=$(($count+1))
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done
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if [ "$FAILED" = "1" ]; then
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echo "/sys/class/net/bonding_masters doesn't exist. Unable to create $BOND_MASTER"
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exit 1
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fi
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fi
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# Create the master interface.
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if ! grep -sq "\\<$BOND_MASTER\\>" /sys/class/net/bonding_masters; then
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echo "+$BOND_MASTER" > /sys/class/net/bonding_masters
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fi
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}
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sysfs_change_down()
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{
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# Called with :
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# $1 = basename of the file in bonding/ to write to.
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# $2 = value to write. Won't write if $2 is empty.
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if [ "$2" ] ; then
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# If the value we plan to write is different from the current one...
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if ! grep -sq "\\<$2\\>" "/sys/class/net/$BOND_MASTER/bonding/$1" ; then
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# ...and the master is up...
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if ip link show "$BOND_MASTER" | grep -sq '[<,]UP[,>]' ; then
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# ...bring the master down.
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ip link set dev "$BOND_MASTER" down
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fi
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fi
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sysfs "$1" "$2"
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fi
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}
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sysfs()
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{
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# Called with :
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# $1 = basename of the file in bonding/ to write to.
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# $2 = value to write. Won't write if $2 is empty.
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if [ "$2" ] ; then
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echo "$2" > "/sys/class/net/$BOND_MASTER/bonding/$1"
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return $?
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fi
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return 0
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}
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sysfs_add()
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{
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#??Called with :
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# $1 = target filename.
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# $2 = values to write.
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for value in $2; do
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# Do not add $2 to $1 if already present.
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if ! grep -sq "\\<$value\\>" /sys/class/net/$BOND_MASTER/bonding/$1
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then
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sysfs "$1" "+$value"
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fi
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done
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}
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# early_setup_master is the place where we do master setup that need to be done before enslavement.
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early_setup_master()
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{
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# Warning: the order in which we write into the sysfs files is important.
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# Double check in drivers/net/bonding/bond_sysfs.c in linux kernel source tree
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# before changing anything here.
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# fail_over_mac must be set before enslavement of any slaves.
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sysfs fail_over_mac "$IF_BOND_FAIL_OVER_MAC"
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}
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# late_setup_master runs actions that need to happen after enslavement
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late_setup_master()
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{
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# primary must be set after mode (because only supported in some modes) and after enslavement.
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# The first slave in bond-primary found in current slaves becomes the primary.
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# If no slave in bond-primary is found, then the primary does not change.
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for slave in $IF_BOND_PRIMARY ; do
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if grep -sq "\\<$slave\\>" "/sys/class/net/$BOND_MASTER/bonding/slaves" ; then
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sysfs primary "$slave"
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break
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fi
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done
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# primary_reselect should be set after mode (because only supported in some modes), after enslavement
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# and after primary. This is currently (2.6.35-rc1) not enforced by the bonding driver, but it is
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# probably safer to do it in that order.
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sysfs primary_reselect "$IF_BOND_PRIMARY_RESELECT"
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# queue_id must be set after enslavement.
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for iface_queue_id in $IF_BOND_QUEUE_ID
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do
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sysfs iface_queue_id $iface_queue_id
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done
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# active_slave must be set after mode and after enslavement.
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# The slave must be up and the underlying link must be up too.
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# FIXME: We should have a way to write an empty string to active_slave, to set the active_slave to none.
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if [ "$IF_BOND_ACTIVE_SLAVE" ] ; then
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# Need to force interface up before. Bonding will refuse to activate a down interface.
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ip link set "$IF_BOND_ACTIVE_SLAVE" up
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sysfs active_slave "$IF_BOND_ACTIVE_SLAVE"
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fi
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}
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enslave_slaves()
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{
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case "$BOND_SLAVES" in
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none)
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BOND_SLAVES=""
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;;
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all)
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BOND_SLAVES=""
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for device in /sys/class/net/*/device; do
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name=$(basename ${device%*/device})
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[ -n "$BOND_SLAVES" ] && BOND_SLAVES="$BOND_SLAVES $name" || BOND_SLAVES="$name"
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done
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AUTOIF="yes"
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;;
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esac
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[ "$VERBOSITY" = 1 ] && v=-v
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for slave in $BOND_SLAVES ; do
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if ( [ "$AUTOIF" ] && ifquery --state $slave ) ; then
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echo "Not enslaving interface $slave since it is already configured"
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else
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# Ensure $slave is down.
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ip link set "$slave" down 2>/dev/null
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if ! sysfs_add slaves "$slave" 2>/dev/null ; then
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echo "Failed to enslave $slave to $BOND_MASTER. Is $BOND_MASTER ready and a bonding interface ?" >&2
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else
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# Bring up slave if it is the target of an allow-bondX stanza.
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# This is useful to bring up slaves that need extra setup.
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if [ -z "$(which ifquery)" ] || ifquery --allow \"$BOND_MASTER\" --list | grep -q $slave; then
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ifup $v --allow "$BOND_MASTER" "$slave"
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fi
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fi
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fi
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done
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}
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setup_master()
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{
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# Warning: the order in which we write into the sysfs files is important.
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# Double check in drivers/net/bonding/bond_sysfs.c in linux kernel source tree
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# before changing anything here.
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# use_carrier can be set anytime.
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sysfs use_carrier "$IF_BOND_USE_CARRIER"
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# num_grat_arp can be set anytime.
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sysfs num_grat_arp "$IF_BOND_NUM_GRAT_ARP"
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# num_unsol_na can be set anytime.
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sysfs num_unsol_na "$IF_BOND_NUM_UNSOL_NA"
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# xmit_hash_policy can be set anytime.
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# Changing xmit_hash_policy requires $BOND_MASTER to be down.
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sysfs_change_down xmit_hash_policy "$IF_BOND_XMIT_HASH_POLICY"
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# arp_ip_target must be set before arp_interval.
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sysfs_add arp_ip_target "$IF_BOND_ARP_IP_TARGET"
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sysfs arp_interval "$IF_BOND_ARP_INTERVAL"
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# miimon must be set before updelay and downdelay.
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sysfs miimon "$IF_BOND_MIIMON"
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sysfs downdelay "$IF_BOND_DOWNDELAY"
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sysfs updelay "$IF_BOND_UPDELAY"
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# Changing ad_select requires $BOND_MASTER to be down.
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sysfs_change_down ad_select "$IF_BOND_AD_SELECT"
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# Changing mode requires $BOND_MASTER to be down.
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# Mode should be set after miimon or arp_interval, to avoid a warning in syslog.
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sysfs_change_down mode "$IF_BOND_MODE"
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# packets_per_slave allowed for mode balance-rr only.
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sysfs packets_per_slave "$IF_BOND_PACKETS_PER_SLAVE"
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# arp_validate must be after mode (because mode must be active-backup).
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sysfs arp_validate "$IF_BOND_ARP_VALIDATE"
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# lacp_rate must be set after mode (because mode must be 802.3ad).
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# Changing lacp_rate requires $BOND_MASTER to be down.
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sysfs_change_down lacp_rate "$IF_BOND_LACP_RATE"
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# Finally bring the bond up, note that without a slave it won't be usable though
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ip link set dev $BOND_MASTER up
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}
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# Option slaves deprecated, replaced by bond-slaves, but still supported for backward compatibility.
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IF_BOND_SLAVES=${IF_BOND_SLAVES:-$IF_SLAVES}
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if [ "$IF_BOND_MASTER" ] ; then
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BOND_MASTER="$IF_BOND_MASTER"
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BOND_SLAVES="$IFACE"
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else
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if [ "$IF_BOND_SLAVES" ] ; then
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BOND_MASTER="$IFACE"
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BOND_SLAVES="$IF_BOND_SLAVES"
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fi
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fi
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# Exit if nothing to do...
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[ -z "$BOND_MASTER$BOND_SLAVES" ] && exit
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# Always try to create the master, returns if already exists
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add_master
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if [ "$BOND_MASTER" = "$IFACE" ]; then
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# Setup the master interface
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early_setup_master
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setup_master
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# Indicate that we're done setting up the master
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# this is required as ifstate is modified at the beginning
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# of the interface setup, not at the end
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touch /run/network/ifenslave.$IFACE
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# Wait for a slave to join, continuing without a slave
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# would make dhclient, vconfig or brctl fail, so better wait
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# Timeout after a minute
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FAILED=1
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echo "Waiting for a slave to join $BOND_MASTER (will timeout after 60s)"
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count=0
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while [ "$count" -lt "600" ]; do
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if [ -n "$(cat /sys/class/net/$BOND_MASTER/bonding/slaves)" ]; then
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FAILED=0
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break
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fi
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sleep 0.1
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count=$(($count+1))
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done
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if [ "$FAILED" = "1" ]; then
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echo "No slave joined $BOND_MASTER, continuing anyway"
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else
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# Trigger the udev bridging hook to bridge the bond if needed
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if [ -x /lib/udev/bridge-network-interface ]; then
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INTERFACE=$BOND_MASTER /lib/udev/bridge-network-interface
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fi
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# Trigger the udev bridging hook to tag the bond if needed
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if [ -x /lib/udev/vlan-network-interface ]; then
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INTERFACE=$BOND_MASTER /lib/udev/vlan-network-interface
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fi
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fi
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else
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# Wait for the master to be ready
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[ ! -f /run/network/ifenslave.$BOND_MASTER ] && echo "Waiting for bond master $BOND_MASTER to be ready"
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while :; do
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if [ -f /run/network/ifenslave.$BOND_MASTER ]; then
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break
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fi
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sleep 0.1
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done
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# Only setup one slave at once
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BOND_SLAVES=$IFACE enslave_slaves
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# Call late_setup_master every time we add a slave as we don't have a way to know
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# when all the slaves are up
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BOND_SLAVES=$IFACE late_setup_master
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fi
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exit 0
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