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322 lines
7.7 KiB
322 lines
7.7 KiB
3 weeks ago
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#!/bin/sh
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#
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# Copyright 2009, 2010 Red Hat, Inc.
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# License: GPLv2
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# Author: Dan Horák <dhorak@redhat.com>
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#
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# unblock devices listed in various config files and wait until they are ready
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#
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# it uses dasd and zfcp config file
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# config file syntax:
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# deviceno options
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# or
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# deviceno WWPN FCPLUN
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#
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# also processes the system ccw config file and network interface configurations
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#
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# requires: echo, sleep, modprobe, grep, printf, sed.
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#
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# it is used in
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# anaconda
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# dracut generated initramfs
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# normal system startup driven by upstart
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#
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DASDCONFIG=/etc/dasd.conf
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ZFCPCONFIG=/etc/zfcp.conf
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ZNETCONFIG=/etc/ccw.conf
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BLACKLIST=/proc/cio_ignore
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CIO_SETTLE=/proc/cio_settle
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VERBOSE=
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PATH=/bin:/sbin
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DEVICE= # list of devices given on command line
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ALL_DEVICES= # list of all unblocked devices
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WAITING_TIMEOUT=60 # maximum time to wait for all devices to appear
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WAITING_TOTAL=0 # actual time spent waiting for devices
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usage()
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{
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echo "Usage: $CMD [-h|--help] [-V|--verbose] [-d|--device <deviceid>]"
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echo " -h|--help print this message"
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echo " -V|--verbose be verbose"
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echo " -d|--device <deviceid> unblock and wait for specified device"
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exit 1
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}
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# accepts single device, comma-separated lists and dash separated ranges and their combinations
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# the comma separated list is split so we minimize the effect of unsuccessful freeing
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free_device()
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{
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local DEV DEV_LIST
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[ -z "$1" ] && return
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DEV_LIST=$(echo "$1" | sed 'y/ABCDEF/abcdef/' | sed 's/,/ /g')
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for DEV in $DEV_LIST; do
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[ $VERBOSE ] && echo "Freeing device(s) $DEV"
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if ! echo "free $DEV" > $BLACKLIST 2> /dev/null ; then
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echo "Error: can't free device(s) $DEV"
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else
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if [ -z $ALL_DEVICES ]; then
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ALL_DEVICES="$DEV"
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else
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ALL_DEVICES="$ALL_DEVICES,$DEV"
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fi
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fi
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done
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}
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# wait until a device appears on the ccw bus
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wait_on_single_device()
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{
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local DEVICE_ONLINE DEV
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[ -z "$1" ] && return
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DEV="$1"
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DEVICE_ONLINE="/sys/bus/ccw/devices/$DEV/online"
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[ $VERBOSE ] && echo "Waiting on device $DEV"
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[ -f "$DEVICE_ONLINE" ] && return
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for t in 1 2 3 4 5
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do
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if [ $WAITING_TOTAL -ge $WAITING_TIMEOUT ]; then
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[ $VERBOSE ] && echo "Waiting timeout of $WAITING_TIMEOUT seconds reached"
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break
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fi
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WAITING_TOTAL=$(($WAITING_TOTAL + $t))
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[ $VERBOSE ] && echo "Waiting additional $t second(s) and $WAITING_TOTAL second(s) in total"
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sleep $t
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[ -f "$DEVICE_ONLINE" ] && return
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done
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echo "Error: device $DEV still not ready"
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}
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# wait until recently unblocked devices are ready
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# at this point we know the content of ALL_DEVICES is syntacticly correct
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wait_on_devices()
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{
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if [ -w $CIO_SETTLE ]; then
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[ $VERBOSE ] && echo "Waiting until all pending CIO requests are processed"
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echo 1 > $CIO_SETTLE
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return
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fi
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OLD_IFS=$IFS
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IFS=","
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set $ALL_DEVICES
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for DEV in $*
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do
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IFS="."
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# get the lower bound for range or get the single device
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LOWER=${DEV%%-*}
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set $LOWER
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if [ $# -eq 1 ]; then
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L0=0
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L1=0
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L2=$(printf "%d" "0x$1")
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else
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L0=$(printf "%d" "0x$1")
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L1=$(printf "%d" "0x$2")
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L2=$(printf "%d" "0x$3")
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fi
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# get the upper bound for range or get the single device
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UPPER=${DEV##*-}
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set $UPPER
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if [ $# -eq 1 ]; then
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U0=0
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U1=0
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U2=$(printf "%d" "0x$1")
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else
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U0=$(printf "%d" "0x$1")
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U1=$(printf "%d" "0x$2")
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U2=$(printf "%d" "0x$3")
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fi
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IFS=$OLD_IFS
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# iterate thru all devices
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i=$L0
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while [ $i -le $U0 ]; do
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[ $i -eq $L0 ] && LJ=$L1 || LJ=0
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[ $i -eq $U0 ] && UJ=$U1 || UJ=3
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j=$LJ
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while [ $j -le $UJ ]; do
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[ $i -eq $L0 -a $j -eq $L1 ] && LK=$L2 || LK=0
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[ $i -eq $U0 -a $j -eq $U1 ] && UK=$U2 || UK=65535
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k=$LK
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while [ $k -le $UK ]; do
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wait_on_single_device "$(printf %x.%x.%04x $i $j $k)"
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k=$(($k + 1))
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done
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j=$(($j + 1))
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done
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i=$(($i + 1))
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done
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done
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}
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process_config_file()
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{
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local CONFIG
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[ -z "$1" ] && return
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CONFIG="$1"
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if [ -f "$CONFIG" ]; then
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while read line; do
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case $line in
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\#*) ;;
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*)
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[ -z "$line" ] && continue
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set $line
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free_device $1
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;;
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esac
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done < "$CONFIG"
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fi
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}
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# check how we were called
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CMD=${0##*/}
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DIR=${0%/*}
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ARGS=$@
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case $CMD in
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"dasd_cio_free")
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MODE_DASD="yes"
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;;
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"zfcp_cio_free")
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MODE_ZFCP="yes"
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;;
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"znet_cio_free")
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MODE_ZNET="yes"
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;;
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"device_cio_free")
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MODE_DASD="yes"
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MODE_ZFCP="yes"
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MODE_ZNET="yes"
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;;
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*)
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echo "Error: unknown alias '$CMD'."
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echo "Supported aliases are dasd_cio_free, zfcp_cio_free and znet_cio_free."
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exit 1
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;;
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esac
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# process command line options
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while [ $# -gt 0 ]; do
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case $1 in
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-V|--verbose)
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VERBOSE=yes
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;;
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-h|--help)
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usage
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;;
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-d|--device)
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shift
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if [ "$1" ]; then
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if [ "$DEVICE" ]; then
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DEVICE="$DEVICE,$1"
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else
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DEVICE=$1
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fi
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else
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echo "Error: no device given"
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usage
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fi
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;;
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*)
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echo "Error: unknown option $1"
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usage
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;;
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esac
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shift
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done
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if [ ! -f $BLACKLIST ]; then
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echo "Error: $BLACKLIST kernel interface doesn't exist"
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exit 2
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fi
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if [ "$DEVICE" ]; then
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[ $VERBOSE ] && echo "Freeing specific devices"
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free_device $DEVICE
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wait_on_devices
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udevadm settle
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exit 0
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fi
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if [ $VERBOSE ]; then
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echo -n "Freeing devices:"
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[ $MODE_DASD ] && echo -n " dasd"
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[ $MODE_ZFCP ] && echo -n " zfcp"
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[ $MODE_ZNET ] && echo -n " znet"
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echo
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fi
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[ $MODE_DASD ] && process_config_file $DASDCONFIG
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[ $MODE_ZFCP ] && process_config_file $ZFCPCONFIG
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if [ $MODE_DASD ]; then
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# process the device list defined as option for the dasd module
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DEVICES=$(modprobe --showconfig | LANG=C grep "options[[:space:]]\+dasd_mod" | \
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sed -e 's/.*[[:space:]]dasd=\([^[:space:]]*\).*/\1/' -e 's/([^)]*)//g' \
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-e 's/nopav\|nofcx\|autodetect\|probeonly//g' -e 's/,,/,/g' -e 's/^,//' -e 's/,$//')
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for DEVRANGE in $(echo $DEVICES | sed 's/,/ /g'); do
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free_device $DEVRANGE
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done
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fi
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if [ $MODE_ZNET ]; then
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# process the config file
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if [ -f "$ZNETCONFIG" ]; then
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while read line; do
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case $line in
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\#*) ;;
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*)
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[ -z "$line" ] && continue
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# grep 2 or 3 channels from each "<nettype>,<subchannels>,<options>" line
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DEVICES=$(echo $line | LANG=C grep -E -i -o "([0-9]\.[0-9]\.[a-f0-9]+,){1,2}([0-9]\.[0-9]\.[a-f0-9]+)")
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free_device $DEVICES
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;;
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esac
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done < "$ZNETCONFIG"
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fi
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# process channels from network interface configurations
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if [ -z "$__sed_discard_ignored_files" ]; then
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if [ -f /etc/init.d/functions ]; then
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. /etc/init.d/functions
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else
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# default value copied from initscripts 9.03.10
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__sed_discard_ignored_files='/\(~\|\.bak\|\.orig\|\.rpmnew\|\.rpmorig\|\.rpmsave\)$/d'
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fi
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fi
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for line in $(LANG=C grep -E -i -h \
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"^[[:space:]]*SUBCHANNELS=['\"]?([0-9]\.[0-9]\.[a-f0-9]+,){1,2}([0-9]\.[0-9]\.[a-f0-9]+)['\"]?([[:space:]]+#|[[:space:]]*$)" \
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$( (ls /etc/sysconfig/network-scripts/ifcfg-* 2> /dev/null || echo "__no_config_file") | \
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LC_ALL=C sed -e "$__sed_discard_ignored_files") 2> /dev/null)
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do
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eval "$line"
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free_device $SUBCHANNELS
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done
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for line in $(LANG=C grep -E -i -h \
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"^s390-subchannels=([0-9]\.[0-9]\.[a-f0-9]+;){2,3}$" \
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$( (ls /etc/NetworkManager/system-connections/*.nmconnection 2> /dev/null || echo "__no_config_file") | \
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LC_ALL=C sed -e "$__sed_discard_ignored_files") 2> /dev/null)
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do
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SUBCHANNELS="$(echo $line | sed -e "s/s390-subchannels=//" -e "s/;/,/g")"
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free_device $SUBCHANNELS
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done
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fi
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[ -z "$ALL_DEVICES" ] && exit 0
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wait_on_devices
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