Previously, we assumed the ifcfg file of a network "interface" is "/etc/sysconfig/network-scripts/ifcfg-<interface>", but actually it is not the case. For example, for network interface "enp0s25", we are able to generate like "/etc/sysconfig/network-scripts/ifcfg-enp0s25-test" for it via network-manager. The "suffix" in "ifcfg-<suffix>" is actually a "configuration" name not "interface" name, though normally we use the "interface" name as its "configuration" name. You can refer to "man ifup" for some detail. So, this patch adds some assistant helpers to acquire the right ifcfg file for an interface. Borrow some logic from script below: "/etc/sysconfig/network-scripts/network-functions" Signed-off-by: Xunlei Pang <xlpang(a)redhat.com&gt; --- kdump-lib.sh | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) diff --git a/kdump-lib.sh b/kdump-lib.sh index 4d34206..90913c5 100755 --- a/kdump-lib.sh +++ b/kdump-lib.sh @@ -230,3 +230,105 @@ is_hostname() fi echo $1 | grep -q "[a-zA-Z]" } + +get_hwaddr() +{ + if [ -f "/sys/class/net/${1}/address" ]; then + awk '{ print toupper($0) }' < /sys/class/net/${1}/address + elif [ -d "/sys/class/net/${1}" ]; then + ip -o link show ${1} 2>/dev/null | \ + awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/, + "\\1", 1)); }' + fi +} + +get_ifcfg_by_device() +{ + grep -E -i -l "^[[:space:]]*DEVICE=\"*${1}\"*[[:space:]]*$" \ + /etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1 +} + +get_ifcfg_by_hwaddr() +{ + grep -E -i -l "^[[:space:]]*HWADDR=\"*${1}\"*[[:space:]]*$" \ + /etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1 +} + +get_ifcfg_by_uuid() +{ + grep -E -i -l "^[[:space:]]*UUID=\"*${1}\"*[[:space:]]*$" \ + /etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1 +} + +get_ifcfg_by_name() +{ + grep -E -i -l "^[[:space:]]*NAME=\"*${1}\"*[[:space:]]*$" \ + /etc/sysconfig/network-scripts/ifcfg-* 2>/dev/null | head -1 +} + +is_nm_running() +{ + [ "$(LANG=C nmcli -t --fields running general status 2>/dev/null)" = "running" ] +} + +is_nm_handling() +{ + LANG=C nmcli -t --fields device,state dev status 2>/dev/null \ + | grep -q "^\(${1}:connected\)\|\(${1}:connecting.*\)$" +} + +# $1: netdev name +get_ifcfg_nmcli() +{ + local nm_uuid nm_name + local ifcfg_file + + # Get the active nmcli config name of $1 + if is_nm_running && is_nm_handling "${1}" ; then + # The configuration "uuid" and "name" generated by nm is wrote to + # the ifcfg file as "UUID=<nm_uuid>" and "NAME=<nm_name>". + nm_uuid=$(LANG=C nmcli -t --fields uuid,device c show --active 2>/dev/null \ + | grep "${1}" | head -1 | cut -d':' -f1) + nm_name=$(LANG=C nmcli -t --fields name,device c show --active 2>/dev/null \ + | grep "${1}" | head -1 | cut -d':' -f1) + ifcfg_file=$(get_ifcfg_by_uuid "${nm_uuid}") + [ -z "${ifcfg_file}" ] && ifcfg_file=$(get_ifcfg_by_name "${nm_name}") + fi + + echo -n "${ifcfg_file}" +} + +# $1: netdev name +get_ifcfg_legacy() +{ + local ifcfg_file + + ifcfg_file="/etc/sysconfig/network-scripts/ifcfg-${1}" + [ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return + + ifcfg_file=$(get_ifcfg_by_name "${1}") + [ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return + + local hwaddr=$(get_hwaddr "${1}") + if [ -n "$hwaddr" ]; then + ifcfg_file=$(get_ifcfg_by_hwaddr "${hwaddr}") + [ -f "${ifcfg_file}" ] && echo -n "${ifcfg_file}" && return + fi + + ifcfg_file=$(get_ifcfg_by_device "${1}") + + echo -n "${ifcfg_file}" +} + +# $1: netdev name +# Return the ifcfg file whole name(including the path) of $1 if any. +get_ifcfg_filename() { + local ifcfg_file + + ifcfg_file=$(get_ifcfg_nmcli "${1}") + if [ -z "${ifcfg_file}" ]; then + ifcfg_file=$(get_ifcfg_legacy "${1}") + fi + + echo -n "${ifcfg_file}" +} -- 1.8.3.1