lauv-aux: added storage server script.

systems/lauv-aux/config

@@ -2,6 +2,7 @@ cfg_architecture='cortex-a8-hardfp'
 cfg_storage='data0:ext4:/opt'
 cfg_modules=''
 cfg_services0='network dropbear storage upgrade syslog ptpd'
+cfg_services1='lauv-storage-server'
 cfg_services2='dune'
 cfg_packages='u-boot dropbear rsync busybox e2fsprogs dosfstools ptpd am33xx-cm3/host rpcbind nfs-utils linux'
 cfg_target_linux_kernel='arch/arm/boot/zImage'
@@ -9,6 +10,7 @@ cfg_target_linux_dtb='arch/arm/boot/dts/am335x-lauv-aux.dtb'
 cfg_target_uboot_config='am335x_bbb'
 cfg_ptpd_interface='eth0'
 cfg_terminal='ttyO0'
+cfg_lauv_storage_dir='/opt/lsts/dune/log'
 cfg_partitions=\
 (
     x-boot  boot0  512B    32MiB

systems/lauv-aux/fs/etc/rc.d/lauv-storage-server

@@ -0,0 +1,134 @@
+mount_storage()
+{
+    echo "* Probing storage..."
+
+    dev="$(ls $1 2> /dev/null)"
+    if [ -z "$dev" ]; then
+        echo "* Storage not present."
+        return 1
+    fi
+
+    bdev="/dev/${dev}$2"
+    if ! [ -b "$bdev" ]; then
+        echo "* Device $bdev does not exist."
+        return 1
+    fi
+
+    mkdir -p "$cfg_lauv_storage_dir"
+    mount -o rw,relatime "$bdev" "$cfg_lauv_storage_dir" 2> /dev/null
+
+    if [ $? -ne 0 ]; then
+        echo "* Failed to mount $bdev on $cfg_lauv_storage_dir"
+        return 1
+    fi
+
+    echo "* Mounted '$bdev' on '$cfg_lauv_storage_dir'"
+    return 0
+}
+
+try_mount_storage()
+{
+    n=0; while [ $n -lt 30 ]; do
+             mount_storage "$1" "$2"
+
+             if [ $? -eq 0 ]; then
+                 return 0
+             fi
+
+             sleep 1
+             let n++
+         done
+
+    return 1
+}
+
+start_nfs_server()
+{
+    echo "* Creating NFS administrative folder..."
+    mkdir -p /var/lib/nfs
+    if ! [ -d /var/lib/nfs ]; then
+        echo "ERROR: failed to create data folder."
+        return 1
+    fi
+
+    echo "* Launching rpcbind..."
+    /usr/bin/rpcbind
+    if [ $? -ne 0 ]; then
+        echo "ERROR: failed to start rpcbind."
+        return 1
+    fi
+
+    echo "* Launching rpc.statd..."
+    /usr/bin/rpc.statd
+    if [ $? -ne 0 ]; then
+        echo "ERROR: failed to start rpc.statd."
+        return 1
+    fi
+
+    echo "* Launching rpc.nfsd..."
+    /usr/bin/rpc.nfsd
+    if [ $? -ne 0 ]; then
+        echo "ERROR: failed to start rpc.nfsd."
+        return 1
+    fi
+
+    echo "* Creating NFS filesystem table..."
+    /usr/bin/exportfs -ra
+    if [ $? -ne 0 ]; then
+        echo "ERROR: failed to create filesystem table."
+        return 1
+    fi
+
+    echo "* Launching rpc.mountd..."
+    /usr/bin/rpc.mountd
+    if [ $? -ne 0 ]; then
+        echo "ERROR: failed to start rpc.mountd."
+        return 1
+    fi
+
+    echo "* Exporting NFS filesystems..."
+    /usr/bin/exportfs \
+        -o rw,sync,no_root_squash,no_subtree_check \
+        10.0.0.0/16:"$cfg_lauv_storage_dir"
+    if [ $? -ne 0 ]; then
+        echo "ERROR: failed to export filesystems."
+        return 1
+    fi
+}
+
+stop_nfs_server()
+{
+    echo "* Unexporting NFS filesystems..."
+    exportfs -au
+    echo "* Terminating rpc.mountd..."
+    killall rpc.mountd 2> /dev/null
+    echo "* Terminating rpc.statd..."
+    killall rpc.statd 2> /dev/null
+    echo "* Terminating rpc.bind..."
+    killall rpcbind 2> /dev/null
+}
+
+start()
+{
+    # Removable storage.
+    try_mount_storage \
+        /sys/devices/ocp.3/47400000.usb/47401c00.usb/musb-hdrc.1.auto/usb2/2-1/2-1:1.0/host0/target0:0:0/0:0:0:0/block \
+        1
+
+    # Internal storage.
+    if [ $? -ne 0 ]; then
+        try_mount_storage \
+            /sys/devices/ocp.3/48060000.mmc/mmc_host/mmc?/mmc?:*/block \
+            p1
+    fi
+
+    # FIXME: what to do if the above fails.
+    start_nfs_server
+}
+
+stop()
+{
+    stop_nfs_server
+    echo "* Unmounting storage.."
+    umount "$cfg_lauv_storage_dir"
+}