wwidmap

   1 #!/bin/bash
   2 declare -A WWIDMAP
   3 declare -A NAMEMAP
   4 declare -A TYPEMAP
   5
   6 WM_DEBUG=yes
   7 WM_DEFAULT_USER="oracle"
   8 WM_DEFAULT_GROUP="oracle"
   9 WM_CONF_PATH="/etc/wwidmap"
  10 WM_DEV_PATH="oracleasm/disks"
  11 WM_MAP_PATH="${WM_CONF_PATH}/map"
  12 WM_CONF="${WM_CONF_PATH}/conf"
  13 WM_USER="$WM_DEFAULT_USER"
  14 WM_GROUP="$WM_DEFAULT_GROUP"
  15 WM_LOCK="/var/lock/wm.lock"
  16 WM_SCSI_ID="/sbin/scsi_id"
  17 WM_SCSI_ID_FLAGS="-g -u"
  18
  19 # load config
  20 . $WM_CONF
  21
  22 error () {
  23     echo "ERROR: $@" 1>&2
  24 }
  25
  26 warn () {
  27     echo "WARNING: $@" 1>&2
  28 }
  29
  30 debug () {
  31     [ "$WM_DEBUG" == "yes" ] && echo "$@" 1>&2
  32 }
  33
  34 # debug print
  35 print_wwid_mapping() {
  36     local WWID=$1
  37     if [ "$WWID" == "" ]; then
  38         return
  39     fi
  40     debug "NNAME for WWID '$WWID' is: '${WWIDMAP[$WWID]}' (${TYPEMAP[$WWID]})"
  41 }
  42
  43 # store the WWID map to disk
  44 wm_store_wwid_map() {
  45     TMP_MAP=$(mktemp --tmpdir=$WM_CONF_DIR)
  46     if [ ! -f $TMP_MAP ]; then
  47         error "could not write temporary file"
  48         exit 1
  49     fi
  50     for WWID in ${!WWIDMAP[@]}; do
  51         echo "$WWID ${WWIDMAP[$WWID]} ${TYPEMAP[$WWID]}"
  52     done  >> $TMP_MAP
  53     mv $TMP_MAP $WM_MAP_PATH
  54 }
  55
  56 # read the WWID map from disk
  57 wm_load_wwid_map() {
  58     if [ ! -f $WM_MAP_PATH ] || [ ! -r $WM_MAP_PATH  ]; then
  59         error "$WM_MAP_PATH does not exist or is not readable"
  60         exit 1
  61     fi
  62     while read WWID NNAME TYPE; do
  63         if [[ $WWID == \#* ]]; then
  64             continue
  65         fi
  66         WWIDMAP[$WWID]="$NNAME"
  67         NAMEMAP[$NNAME]="$WWID"
  68         TYPEMAP[$WWID]="$TYPE"
  69     done < $WM_MAP_PATH
  70 }
  71
  72 # add_wwid_mapping <wwid> <nickname> <sd|mpath>
  73 add_wwid_mapping() {
  74     local WWID
  75     WWID="$1"
  76     NNAME="$2"
  77     if [ "$WWID" == "" ]; then
  78         warn "no wwid given"
  79         return
  80     fi
  81     if [ "$NNAME" == "" ]; then
  82         warn "no nickname given"
  83         return
  84     fi
  85     if [ "${NAMEMAP[$WWID]}" != "" ]; then
  86         warn "$WWID already mapped to name ${NAMEMAP[$WWID]}; replacing it."
  87     fi
  88     WWIDMAP[$WWID]="$NNAME"
  89     NAMEMAP[$NNAME]="$WWID"
  90     TYPEMAP[$WWID]="sd"
  91 }
  92
  93 # del_wwid_mapping <wwid>
  94 del_wwid_mapping() {
  95     local WWID NNAME
  96     WWID="$1"
  97     if [ "$WWID" == "" ]; then
  98         return 1
  99     fi
 100     if [ "${WWIDMAP[$WWID]}" == "" ]; then
 101         warn "WARNING: $WWID does not exist; doing nothing."
 102         return 1
 103     fi
 104     NNAME=${WWIDMAP[$WWID]}
 105     unset WWIDMAP[$WWID]
 106     unset NAMEMAP[$NNAME]
 107     unset TYPEMAP[$WWID]
 108 }
 109
 110 wm_scsi_id () {
 111     $WM_SCSI_ID $WM_SCSI_ID_FLAGS $1
 112 }
 113
 114 wm_configure () {
 115     cat <<EOF
 116 Configuring the udev wwid map.
 117
 118 This will configure persistent mappings and permissions for storage
 119 devices. The current values will be shown in brackets ('[]'). Hitting
 120 <ENTER> without typing an answer will keep the current value. Ctrl-C
 121 will abort.
 122
 123 EOF
 124
 125     echo -n "Default user to own device nodes [$WM_USER]: "
 126     read _WM_USER
 127     if [ "$_WM_USER" != "" ]; then
 128         WM_USER=$_WM_USER;
 129     fi
 130     echo -n "Default group to own device nodes [$WM_GROUP]: "
 131     read _WM_GROUP
 132     if [ "$_WM_GROUP" != "" ]; then
 133         WM_GROUP=$_WM_GROUP;
 134     fi
 135     echo -n "Default device directory [$WM_DEV_PATH]: "
 136     read _WM_DEV_PATH
 137     if [ "$_WM_DEV_PATH" != "" ]; then
 138         WM_DEV_PATH=$_WM_DEV_PATH;
 139     fi
 140     debug "WM_DEV_PATH=\"$WM_DEV_PATH\""
 141     debug "WM_USER=\"$WM_USER\""
 142     debug "WM_GROUP=\"$WM_GROUP\""
 143     echo -n "Writing wwid map configuration: "
 144     TMP_CONF=$(mktemp --tmpdir=$WM_CONF_PATH)
 145     if [ ! -f $TMP_CONF ]; then
 146         echo
 147         error "could not write temporary file"
 148         exit 1
 149     fi
 150     echo "WM_DEV_PATH=\"$WM_DEV_PATH\"" >> $TMP_CONF
 151     echo "WM_USER=\"$WM_USER\"" >> $TMP_CONF
 152     echo "WM_GROUP=\"$WM_GROUP\"" >> $TMP_CONF
 153     mv $TMP_CONF $WM_CONF
 154     if [ "$?" != 0 ]; then
 155         error "could not create configuration file $WM_CONF"
 156         exit
 157     fi
 158     echo "done"
 159 }
 160
 161 # createdisk <nickname> <device>
 162 wm_createdisk () {
 163     local WWID DEV NNAME
 164     NNAME="$1"
 165     DEV="$2"
 166     if [ "$DEV" == "" ] || [ "$NNAME" == "" ]; then
 167         echo "Usage: $0 createdisk <nickname> <device>"
 168         exit 2
 169     fi
 170     WWID=$(wm_scsi_id $DEV)
 171     add_wwid_mapping $WWID $NNAME "sd"
 172     wm_store_wwid_map
 173 }
 174
 175 wm_deletedisk () {
 176     local WWID NNAME
 177     NNAME=$1
 178     if [ "$NNAME" == "" ]; then
 179         echo "Usage: $0 deletedisk <nickname>"
 180         exit 2
 181     fi
 182     WWID=${NAMEMAP[$NNAME]}
 183     if [ "$WWID" == "" ]; then
 184         error "\"$NNAME\" does not exist"
 185         echo "Usage: $0 deletedisk <nickname>"
 186         exit 2
 187     fi
 188     echo -n "Removing wwid map disk \"$NNAME\":"
 189     del_wwid_mapping $WWID \
 190     && echo "                                  [  OK  ]"
 191     wm_store_wwid_map
 192 }
 193
 194 wm_list_disks () {
 195     for D in ${WWIDMAP[@]}; do
 196         echo $D
 197     done | sort -V
 198 }
 199
 200 wm_querydisk () {
 201     warn "(unimplemented)"
 202 }
 203
 204 wm_scandisks () {
 205     warn "(unimplemented)"
 206 }
 207
 208 wm_map () {
 209     local WWID
 210     WWID="$1"
 211     if [ "$WWID" == "" ] || [ "${WWIDMAP[$WWID]}" == "" ]; then
 212         echo "Usage: $0 map <wwid>" 1>&2
 213         exit 2
 214     fi
 215     echo "WM_WWID=$WWID"
 216     echo "WM_NAME=$WM_DEV_PATH/${WWIDMAP[$WWID]}"
 217     echo "WM_TYPE=${TYPEMAP[$WWID]}"
 218     echo "WM_USER=$WM_USER"
 219     echo "WM_GROUP=$WM_GROUP"
 220 }
 221
 222 case "$1" in
 223     configure)
 224         wm_configure
 225         ;;
 226     createdisk)
 227         wm_load_wwid_map
 228         wm_createdisk $2 $3
 229         ;;
 230     deletedisk)
 231         wm_load_wwid_map
 232         wm_deletedisk $2
 233         ;;
 234     listdisks)
 235         wm_load_wwid_map
 236         wm_list_disks
 237         ;;
 238     querydisk)
 239         wm_querydisk
 240         ;;
 241     scandisks)
 242         wm_scandisks
 243         ;;
 244     map)
 245         wm_load_wwid_map
 246         wm_map $2
 247         ;;
 248     *)
 249         echo -n "Usage: $0 "
 250         echo "{configure|createdisk|deletedisk|scandisks|querydisk|map}"
 251         exit 2
 252 esac
 253