From d8ad687e1a4c0343eb076902b11aff2b2b2c4b85 Mon Sep 17 00:00:00 2001

From: Harald Hoyer <harald@redhat.com>

Date: Fri, 3 Jul 2015 13:30:40 +0200

Subject: [PATCH] network: add options to tweak timeouts

 rd.net.dhcp.retry=<cnt>

     If this option is set, dracut will try to connect via dhcp

     <cnt> times before failing. Default is 1.

 rd.net.timeout.dhcp=<arg>

     If this option is set, dhclient is called with "-timeout <arg>".

 rd.net.timeout.iflink=<seconds>

     Wait <seconds> until link shows up. Default is 60 seconds.

 rd.net.timeout.ifup=<seconds>

     Wait <seconds> until link has state "UP". Default is 20 seconds.

 rd.net.timeout.route=<seconds>

     Wait <seconds> until route shows up. Default is 20 seconds.

 rd.net.timeout.ipv6dad=<seconds>

     Wait <seconds> until IPv6 DAD is finished. Default is 50 seconds.

 rd.net.timeout.ipv6auto=<seconds>

     Wait <seconds> until IPv6 automatic addresses are assigned.

     Default is 40 seconds.

 rd.net.timeout.carrier=<seconds>

     Wait <seconds> until carrier is recognized. Default is 5 seconds.

---

 dracut.cmdline.7.asc           | 25 +++++++++++++++++++++++

 modules.d/40network/ifup.sh    | 26 ++++++++++++++++++++----

 modules.d/40network/net-lib.sh | 36 ++++++++++++++++++++++++++++------

 3 files changed, 77 insertions(+), 10 deletions(-)

diff --git a/dracut.cmdline.7.asc b/dracut.cmdline.7.asc

index c7e3bd40..5f3dead1 100644

--- a/dracut.cmdline.7.asc

+++ b/dracut.cmdline.7.asc

@@ -572,6 +572,31 @@ NFS

 **rd.nfs.domain=**__<NFSv4 domain name>__::

     Set the NFSv4 domain name. Will overwrite the settings in _/etc/idmap.conf_.

+**rd.net.dhcp.retry=**__<cnt>__::

+    If this option is set, dracut will try to connect via dhcp <cnt> times before failing.

+    Default is 1.

+

+**rd.net.timeout.dhcp=**__<arg>__::

+    If this option is set, dhclient is called with "-timeout <arg>".

+

+**rd.net.timeout.iflink=**__<seconds>__::

+    Wait <seconds> until link shows up. Default is 60 seconds.

+

+**rd.net.timeout.ifup=**__<seconds>__::

+    Wait <seconds> until link has state "UP". Default is 20 seconds.

+

+**rd.net.timeout.route=**__<seconds>__::

+    Wait <seconds> until route shows up. Default is 20 seconds.

+

+**rd.net.timeout.ipv6dad=**__<seconds>__::

+    Wait <seconds> until IPv6 DAD is finished. Default is 50 seconds.

+

+**rd.net.timeout.ipv6auto=**__<seconds>__::

+    Wait <seconds> until IPv6 automatic addresses are assigned. Default is 40 seconds.

+

+**rd.net.timeout.carrier=**__<seconds>__::

+    Wait <seconds> until carrier is recognized. Default is 5 seconds.

+

 CIFS

 ~~~

 **root=**cifs://[__<username>__[:__<password>__]@]__<server-ip>__:__<root-dir>__::

diff --git a/modules.d/40network/ifup.sh b/modules.d/40network/ifup.sh

index 3cff725c..2f51e6d5 100755

--- a/modules.d/40network/ifup.sh

+++ b/modules.d/40network/ifup.sh

@@ -98,15 +98,33 @@ do_dhcp() {

     # event for nfsroot

     # XXX add -V vendor class and option parsing per kernel

+    local _COUNT=0

+    local _timeout=$(getargs rd.net.timeout.dhcp=)

+    local _DHCPRETRY=$(getargs rd.net.dhcp.retry=)

+    _DHCPRETRY=${_DHCPRETRY:-1}

+

     [ -e /tmp/dhclient.$netif.pid ] && return 0

     if ! iface_has_link $netif; then

-        echo "No carrier detected"

+        warn "No carrier detected on interface $netif"

         return 1

     fi

-    echo "Starting dhcp for interface $netif"

-    dhclient "$@" -1 -q -cf /etc/dhclient.conf -pf /tmp/dhclient.$netif.pid -lf /tmp/dhclient.$netif.lease $netif \

-        || echo "dhcp failed"

+

+    while [ $_COUNT -lt $_DHCPRETRY ]; do

+        info "Starting dhcp for interface $netif"

+        dhclient "$@" \

+                 ${_timeout:+-timeout $_timeout} \

+                 -1 -q \

+                 -cf /etc/dhclient.conf \

+                 -pf /tmp/dhclient.$netif.pid \

+                 -lf /tmp/dhclient.$netif.lease \

+                 $netif \

+            && return 0

+        _COUNT=$(($_COUNT+1))

+        [ $_COUNT -lt $_DHCPRETRY ] && sleep 1

+    done

+    warn "dhcp for interface $netif failed"

+    return 1

 }

 load_ipv6() {

diff --git a/modules.d/40network/net-lib.sh b/modules.d/40network/net-lib.sh

index 1f77a154..de5273ca 100755

--- a/modules.d/40network/net-lib.sh

+++ b/modules.d/40network/net-lib.sh

@@ -486,7 +486,11 @@ parse_ifname_opts() {

 wait_for_if_link() {

     local cnt=0

     local li

-    while [ $cnt -lt 600 ]; do

+    local timeout="$(getargs rd.net.timeout.iflink=)"

+    timeout=${timeout:-60}

+    timeout=$(($timeout*10))

+

+    while [ $cnt -lt $timeout ]; do

         li=$(ip -o link show dev $1 2>/dev/null)

         [ -n "$li" ] && return 0

         sleep 0.1

@@ -498,7 +502,11 @@ wait_for_if_link() {

 wait_for_if_up() {

     local cnt=0

     local li

-    while [ $cnt -lt 200 ]; do

+    local timeout="$(getargs rd.net.timeout.ifup=)"

+    timeout=${timeout:-20}

+    timeout=$(($timeout*10))

+

+    while [ $cnt -lt $timeout ]; do

         li=$(ip -o link show up dev $1)

         [ -n "$li" ] && [ -z "${li##*state UP*}" ] && return 0

         sleep 0.1

@@ -509,7 +517,11 @@ wait_for_if_up() {

 wait_for_route_ok() {

     local cnt=0

-    while [ $cnt -lt 200 ]; do

+    local timeout="$(getargs rd.net.timeout.route=)"

+    timeout=${timeout:-20}

+    timeout=$(($timeout*10))

+

+    while [ $cnt -lt $timeout ]; do

         li=$(ip route show)

         [ -n "$li" ] && [ -z "${li##*$1*}" ] && return 0

         sleep 0.1

@@ -521,7 +533,11 @@ wait_for_route_ok() {

 wait_for_ipv6_dad() {

     local cnt=0

     local li

-    while [ $cnt -lt 500 ]; do

+    local timeout="$(getargs rd.net.timeout.ipv6dad=)"

+    timeout=${timeout:-50}

+    timeout=$(($timeout*10))

+

+    while [ $cnt -lt $timeout ]; do

         li=$(ip -6 addr show dev $1 scope link)

         strstr "$li" "tentative" || return 0

         sleep 0.1

@@ -533,7 +549,11 @@ wait_for_ipv6_dad() {

 wait_for_ipv6_auto() {

     local cnt=0

     local li

-    while [ $cnt -lt 400 ]; do

+    local timeout="$(getargs rd.net.timeout.ipv6auto=)"

+    timeout=${timeout:-40}

+    timeout=$(($timeout*10))

+

+    while [ $cnt -lt $timeout ]; do

         li=$(ip -6 addr show dev $1)

         if ! strstr "$li" "tentative"; then

             strstr "$li" "dynamic" && return 0

@@ -561,8 +581,12 @@ iface_has_link() {

     [ -n "$interface" ] || return 2

     interface="/sys/class/net/$interface"

     [ -d "$interface" ] || return 2

+    local timeout="$(getargs rd.net.timeout.carrier=)"

+    timeout=${timeout:-5}

+    timeout=$(($timeout*10))

+

     linkup "$1"

-    while [ $cnt -lt 50 ]; do

+    while [ $cnt -lt $timeout ]; do

         [ "$(cat $interface/carrier)" = 1 ] && return 0

         sleep 0.1

         cnt=$(($cnt+1))