tcm_restore: restore FC targets

Signed-off-by: Hannes Reinecke <hare@suse.com>
morecache · Apr 25, 2017 · 39cfa4c · 39cfa4c
1 parent ddf8e83
commit 39cfa4c
Showing 1 changed file with 117 additions and 0 deletions.
diff --git a/tcm_restore.sh b/tcm_restore.sh
@@ -1,6 +1,8 @@
 #!/bin/bash
 
 core=/sys/kernel/config/target/core
+fc=/sys/kernel/config/target/fc
+
 JSON=$1
 
 apply_attributes () {
@@ -131,6 +133,101 @@ setup_iblock() {
     echo "${pname}"
 }
 
+gen_fc_port_name() {
+    local port_num
+
+    port_num=${1#naa.}
+    for i in $(seq 1 2 13) ; do
+	j=$(expr $i + 1)
+	p=$(echo $port_num | cut --bytes=$i-$j)
+	printf "%02x:" $(( 16#$p ))
+    done
+    p=$(echo $port_num | cut --bytes=15-16)
+    printf "%02x\n" $(( 16#$p ))
+}
+
+setup_fc_luns() {
+    local jsonobj=$1
+    local tname=$2
+    local l
+    local v
+    local j
+    local idx lname storage_object iblockname backstore alua
+
+    l=0
+    while [ true ] ; do
+	j="${jsonobj}.luns[$l]"
+	v=$(cat $JSON | jq -c "${j}.index")
+	idx=$(eval echo $v)
+	[ "$idx" = "null" ] && break
+
+	lname=${tname}/lun/lun_${idx}
+	if [ ! -d ${lname} ] ; then
+	    mkdir ${lname} || exit 1
+	fi
+	v=$(cat $JSON | jq -c "${j}.storage_object")
+	storage_object=$(eval echo $v)
+	case $storage_object in
+	    /backstores/block/*)
+		iblockname=${storage_object##*/}
+		for d in ${core}/iblock_* ; do
+		    [ -d $d ] || continue
+		    if [ -d "$d/$iblockname" ] ; then
+			backstore="$d/$iblockname"
+		    fi
+		done
+		;;
+	    *)
+		backstore=
+		;;
+	esac
+	if [ -n "$backstore" ] ; then
+	    v=$(cat $JSON | jq -c "${j}.alias")
+	    alias=$(eval echo $v)
+	    if [ "$alias" = "null" ] ; then
+		alias="mapped_lun"
+	    fi
+	    ln -s $backstore $lname/$alias
+	fi
+	v=$(cat $JSON | jq -c "${j}.alua_tg_pt_gp_name")
+	alua=$(eval echo $v)
+	if [ "$alua" != "null" ] && [ "$alua" != "default_tg_pt_gp" ] ; then
+	    echo "$alua" > $tname/alua_tg_pt_gp
+	fi
+	(( l++ ))
+    done
+}
+
+setup_fc() {
+    local jsonobj=$1
+    local wwn
+    local t
+    local tpgt_id
+
+    if [ ! -d ${fc} ] ; then
+	mkdir ${fc} || exit 1
+    fi
+    wwn=$(gen_fc_port_name $2)
+    pname=${fc}/${wwn}
+    if [ ! -d ${pname} ] ; then
+	mkdir ${pname} || exit 1
+    fi
+
+    t=0
+    while [ true ] ; do
+	jo="${jsonobj}.tpgs[$t]"
+	j=$(cat $JSON | jq -c "${jo}")
+	[ $(eval echo $j) = "null" ] && return
+	tpgt_id=$(expr $t + 1)
+	tname="$pname/tpgt_${tpgt_id}"
+	if [ ! -d ${tname} ] ; then
+	    mkdir ${tname} || exit 1
+	fi
+	setup_fc_luns $jo $tname
+	(( t++ ))
+    done
+}
+
 i=0
 while [ true ] ; do
     jsonobj=".storage_objects[$i]"
@@ -154,3 +251,23 @@ while [ true ] ; do
     fi
     (( i++ ))
 done
+
+i=0
+while [ true ] ; do
+    jsonobj=".targets[$i]"
+    f=$(cat $JSON | jq -c "${jsonobj}.fabric")
+    fabric=$(eval echo $f)
+    case "$fabric" in
+	tcm_fc)
+	    w=$(cat $JSON | jq -c "${jsonobj}.wwn")
+	    wwn=$(eval echo $w)
+	    if [ "$wwn" != "null" ] ; then
+		echo "Setting up FC WWN $wwn"
+		setup_fc ${jsonobj} $wwn
+	    fi
+	    ;;
+	null)
+	    break
+    esac
+    (( i++ ))
+done