NFS-Ganesha: Automatically export vol that was exported before vol restart

Consider a volume that is exported via NFS-Ganesha. Stopping this
volume will automatically unexport the volume. Starting this volume
should automatically export it. Although the logic was already there,
there was a bug in it. Fixing the same by introducing a hook script.

Also with the new CLI options, the hook script S31ganesha-set.sh
is no longer required. Hence, removing the same.
Adding a comment to tell the user that one of the CLI
commands will take a few minutes to complete.

Change-Id: Ibff769ca04fef0c2a129c83fe31fc9c869350e8d
BUG: 1231738
Signed-off-by: Meghana Madhusudhan <mmadhusu@redhat.com>
Reviewed-on: http://review.gluster.org/11247
Reviewed-by: soumya k <skoduri@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>

2 files changed, 115 insertions, 1 deletions

diff --git a/extras/hook-scripts/start/post/Makefile.am b/extras/hook-scripts/start/post/Makefile.am
index d9cba93ed52..ad53233b1c9 100644
--- a/extras/hook-scripts/start/post/Makefile.am
+++ b/extras/hook-scripts/start/post/Makefile.am
@@ -1 +1 @@
-EXTRA_DIST = S29CTDBsetup.sh S30samba-start.sh
+EXTRA_DIST = S29CTDBsetup.sh S30samba-start.sh S31ganesha-start.sh
diff --git a/extras/hook-scripts/start/post/S31ganesha-start.sh b/extras/hook-scripts/start/post/S31ganesha-start.sh
new file mode 100755
index 00000000000..7ba8af1e6e4
--- /dev/null
+++ b/extras/hook-scripts/start/post/S31ganesha-start.sh
@@ -0,0 +1,114 @@
+#!/bin/bash
+PROGNAME="Sganesha-start"
+OPTSPEC="volname:,gd-workdir:"
+VOL=
+declare -i EXPORT_ID
+ganesha_key="ganesha.enable"
+GANESHA_DIR="/etc/ganesha"
+CONF1="$GANESHA_DIR/ganesha.conf"
+GLUSTERD_WORKDIR=
+
+function parse_args ()
+{
+        ARGS=$(getopt -l $OPTSPEC  -o "o" -name $PROGNAME $@)
+        eval set -- "$ARGS"
+
+        while true; do
+            case $1 in
+                --volname)
+                    shift
+                    VOL=$1
+                    ;;
+                --gd-workdir)
+                    shift
+                    GLUSTERD_WORKDIR=$1
+                    ;;
+                *)
+                    shift
+                    break
+                    ;;
+            esac
+            shift
+        done
+}
+
+
+
+#This function generates a new export entry as export.volume_name.conf
+function write_conf()
+{
+        echo "EXPORT{
+        "
+        echo "Export_Id = ;"
+        echo "Path=\"/$1\";"
+        echo "FSAL {
+        "
+        echo "name = "GLUSTER";"
+        echo "hostname="localhost";"
+        echo  "volume=\"$1\";"
+        echo "}"
+        echo "Access_type = RW;"
+        echo "Squash = No_root_squash;"
+        echo "Disable_ACL = TRUE;"
+        echo "Pseudo=\"/$1\";"
+        echo "Protocols = \"3\",\"4\" ;"
+        echo "Transports = \"UDP\",\"TCP\" ;"
+        echo "SecType = \"sys\";"
+        echo "}"
+}
+
+#This function keeps track of export IDs and increments it with every new entry
+function export_add()
+{
+        count=`ls -l $GANESHA_DIR/exports/*.conf | wc -l`
+        if [ "$count" = "0" ] ;
+                then
+                EXPORT_ID=2
+        else
+        #if [ -s /var/lib/ganesha/export_removed ];
+        #               then
+        #               EXPORT_ID=`head -1 /var/lib/ganesha/export_removed`
+        #               sed -i -e "1d" /var/lib/ganesha/export_removed
+        #               else
+
+                 EXPORT_ID=`cat $GANESHA_DIR/.export_added`
+                 EXPORT_ID=EXPORT_ID+1
+        #fi
+        fi
+        echo $EXPORT_ID > $GANESHA_DIR/.export_added
+        sed -i s/Export_Id.*/"Export_Id= $EXPORT_ID ;"/ \
+$GANESHA_DIR/exports/export.$VOL.conf
+        echo "%include \"$GANESHA_DIR/exports/export.$VOL.conf\"" >> $CONF1
+}
+
+#This function adds a new export dynamically by sending dbus signals
+function dynamic_export_add()
+{
+        dbus-send --print-reply --system --dest=org.ganesha.nfsd \
+/org/ganesha/nfsd/ExportMgr org.ganesha.nfsd.exportmgr.AddExport \
+string:$GANESHA_DIR/exports/export.$VOL.conf string:"EXPORT(Path=/$VOL)"
+
+}
+
+function start_ganesha()
+{
+        #Remove export entry from nfs-ganesha.conf
+        sed -i /$VOL.conf/d  $CONF1
+        #Create a new export entry
+        export_add $VOL
+        dynamic_export_add $VOL
+
+}
+
+        parse_args $@
+        ganesha_value=$(grep $ganesha_key  $GLUSTERD_WORKDIR/vols/$VOL/info |\
+                        cut -d"=" -f2)
+        if [ "$ganesha_value" = "on" ]
+        then
+                write_conf $VOL
+                start_ganesha $VOL
+        else
+                exit 0
+        fi
+
+