From 49a54b6f2157e80c076528c15eb7928c6ef06d24 Mon Sep 17 00:00:00 2001
From: Jonathan Bauer
Date: Mon, 12 Nov 2018 12:45:59 +0100
Subject: [dnbd3-rfs] refactor to use slx-partitioner

---
 .../dnbd3-rootfs/hooks/mount-root-device.sh        |   2 +-
 .../dnbd3-rootfs/hooks/prepare-root-partition.sh   | 103 +++------------------
 builder/modules.d/dnbd3-rootfs/module-setup.sh     |  11 ++-
 3 files changed, 19 insertions(+), 97 deletions(-)

diff --git a/builder/modules.d/dnbd3-rootfs/hooks/mount-root-device.sh b/builder/modules.d/dnbd3-rootfs/hooks/mount-root-device.sh
index 35443def..a5aceab6 100755
--- a/builder/modules.d/dnbd3-rootfs/hooks/mount-root-device.sh
+++ b/builder/modules.d/dnbd3-rootfs/hooks/mount-root-device.sh
@@ -14,7 +14,7 @@ logging.set_log_file "$SLX_LOG_FILE_PATH"
 
 if ! getarg root=; then
     source "/etc/openslx"
-    mount /dev/mapper/root "$NEWROOT" $SLX_MOUNT_ROOT_OPTIONS
+    mount "$SLX_DNBD3_DEVICE_COW" "$NEWROOT" $SLX_MOUNT_ROOT_OPTIONS
     if [ -n "$SLX_GENERATE_FSTAB_SCRIPT" ]; then
         eval "$SLX_GENERATE_FSTAB_SCRIPT"
     else
diff --git a/builder/modules.d/dnbd3-rootfs/hooks/prepare-root-partition.sh b/builder/modules.d/dnbd3-rootfs/hooks/prepare-root-partition.sh
index 4ac01632..1b575067 100755
--- a/builder/modules.d/dnbd3-rootfs/hooks/prepare-root-partition.sh
+++ b/builder/modules.d/dnbd3-rootfs/hooks/prepare-root-partition.sh
@@ -15,85 +15,7 @@ logging.set_level debug
 [[ "$SLX_LOG_FILE_PATH" == "" ]] && SLX_LOG_FILE_PATH=/var/log/openslx
 logging.set_log_file "$SLX_LOG_FILE_PATH"
 
-# region find writable partition
-# support comma-separated list of identifiers
-IFS_backup="$IFS"
-IFS=','
-for identifier in $SLX_WRITABLE_DEVICE_IDENTIFIER; do
-  if [[ "$identifier" != '' ]] &&
-    persistent_device="$(
-      tools.find_block_device "$identifier" '' \
-        "$SLX_WRITABLE_DEVICE_IDENTIFIER_TIMEOUT_IN_SECONDS")"; then
-    break
-  fi
-  persistent_device=
-done
-IFS="$IFS_backup"
-
-if [ -z "$persistent_device" ]; then
-    logging.warn "Failed to find unique device with identifiers" \
-        "\"${SLX_WRITABLE_DEVICE_IDENTIFIER}\"; matched devices:" \
-        "\"${persistent_device}\""
-fi
-
-if [ -n "$SLX_WRITABLE_DEVICE_STORAGE_FILE_PATH" ] && [ -n "$persistent_device" ]; then
-    persistent_mountpoint=/mnt/slx_writable_device
-    storage_file_path="${persistent_mountpoint}/$SLX_WRITABLE_DEVICE_STORAGE_FILE_PATH"
-    ! mkdir --parents "$(dirname "$storage_file_path")"
-    if ! mount --type auto "$persistent_device" "$persistent_mountpoint"; then
-        logging.warn "Failed to mount $persistent_device, checking filesystem."
-        ! $SLX_WRITABLE_DEVICE_STORAGE_FILESYSTEM_CHECK_COMMAND \
-            "$persistent_device"
-        if ! mount --type auto "$persistent_device" "$persistent_mountpoint"; then
-            logging.warn "Mounting $persistent_device, still failing," \
-                "creating new filesystem on device"
-            $SLX_WRITABLE_DEVICE_STORAGE_FILESYSTEM_CREATE_COMMAND \
-                "$persistent_device"
-        fi
-        if ! mount --type auto "$persistent_device" "$persistent_mountpoint"; then
-            logging.warn "Mounting $persistent_device, still failing," \
-                "giving up, and using ramdisk"
-            persistent_device=""
-        fi
-    fi
-    if [ -n "$persistent_device" ]; then
-        if [ ! -e "$storage_file_path" ]; then
-            # Create a sparse file.
-            dd of="$storage_file_path" bs=1M \
-                seek="$SLX_WRITABLE_DEVICE_STORAGE_MAXIMUM_FILE_SIZE_IN_MB" count=0
-        fi
-        persistent_device="$(losetup --find)"
-        losetup "$persistent_device" "$storage_file_path"
-    fi
-fi
-
-# "P" for persistent storage, "N" for not persistent (affects dmsetup call,
-# see scripts/device-add-write-layer.sh)
-persistent='N'
-if [ -n "$persistent_device" ]; then
-    writable_device="$persistent_device"
-    if [ "$SLX_WRITABLE_DEVICE_PERSISTENT" = "yes" ]; then
-        persistent='P'
-    fi
-else
-    ramdisk_size_in_kb="$SLX_RAMDISK_SIZE_IN_KB"
-    if [ "$ramdisk_size_in_kb" = '' ]; then
-        ramdisk_size_in_kb="$(awk '/MemTotal/ {print $2}' /proc/meminfo)"
-    fi
-    # NOTE: If the kernel modul "brd" is compiled into current kernel we can't
-    # configure ram disk size dynamically. In this case it have to be
-    # configured via kernel command line: "brd.rd_size=SITE_IN_KILOBYTE"
-    # statically:
-    #! rmmod brd 2>/dev/null
-    #modprobe brd max_part=1 rd_size="$ramdisk_size_in_kb"
-    #writable_device='/dev/ram0'
-    ramdisk_location="$(mktemp)"
-    dd of="$ramdisk_location" seek="$ramdisk_size_in_kb" count=0 1>/dev/null
-    writable_device="$(losetup --find)"
-    losetup "$writable_device" "$ramdisk_location"
-fi
-# endregion
-# region connect dnbd3
+# region connect dnbd3 image
 IFS_backup="$IFS"
 IFS=", "
 return_code=1
@@ -115,7 +37,7 @@ if [[ $return_code != 0 ]]; then
     exit 1
 fi
 # endregion
-# region scan partitions
+# region unpack dnbd3 image with xmount
 if [ "$SLX_LOG_FILE_PATH" != "" ]; then
     read_only_device="$(container-unpack-xmount "$SLX_DNBD3_DEVICE" \
         2>>"$SLX_LOG_FILE_PATH")"
@@ -123,19 +45,19 @@ else
     read_only_device="$(container-unpack-xmount "$SLX_DNBD3_DEVICE")"
 fi
 
-
-# Fail fast if no device could be determined.
+# Fail fast if unpacking dnbd3 image failed.
 [ -z "$read_only_device" ] && exit 1
+
 # endregion
-# region find read-only partition
+# region find system partition within dnbd3 image
 if [ -z "$SLX_SYSTEM_PARTITION_PREPARATION_SCRIPT" ]; then
     if [ -z "$SLX_SYSTEM_PARTITION_IDENTIFIER" ]; then
         # if empty use whole device
         read_only_partition="$read_only_device"
         true
     else
-        read_only_partition="$(tools.find_block_device \
-            "$SLX_SYSTEM_PARTITION_IDENTIFIER" "$read_only_device")"
+        read_only_partition="$(get_partitions_by_id \
+            "$read_only_device" "$SLX_SYSTEM_PARTITION_IDENTIFIER")"
     fi
 else
     eval "$SLX_SYSTEM_PARTITION_PREPARATION_SCRIPT"
@@ -146,14 +68,13 @@ if [[ ! $? || -z "$read_only_partition" ]]; then
         "\"${read_only_partition}\""
     exit 1
 fi
-# endregion
-
 logging.info "Using read-only partition: $read_only_partition"
-logging.info "Using writable device $writable_device, persistency: $persistent"
 
-# combine devices with device mapper
-device-add-write-layer "root" "$read_only_partition" "$writable_device" \
-    "$persistent"
+# endregion
+
+# region RW layer through slx-partitioner
+/usr/bin/slx_partitioner $read_only_partition
+# endregion
 
 }
 exceptions.catch
diff --git a/builder/modules.d/dnbd3-rootfs/module-setup.sh b/builder/modules.d/dnbd3-rootfs/module-setup.sh
index 759cd476..f956af3c 100755
--- a/builder/modules.d/dnbd3-rootfs/module-setup.sh
+++ b/builder/modules.d/dnbd3-rootfs/module-setup.sh
@@ -153,7 +153,7 @@ depends() {
     '
     local network_module="network"
     dracut_module_included "systemd-initrd" && network_module="systemd-networkd-ext"
-    echo base bash kernel-modules shutdown "$network_module"
+    echo base bash kernel-modules shutdown slx-partitioner "$network_module"
 }
 installkernel() {
     local __doc__='
@@ -166,7 +166,6 @@ installkernel() {
     '
     inst "$moddir/binaries/dnbd3/build/dnbd3.ko" \
         /usr/lib/modules/current/extra/dnbd3.ko
-    instmods dm_snapshot btrfs crc32c
 }
 install() {
     local __doc__='
@@ -185,6 +184,8 @@ install() {
         /usr/bin/device-add-write-layer
     inst "$moddir/scripts/container-unpack-xmount.sh" \
         /usr/bin/container-unpack-xmount
+    inst "$moddir/scripts/container-unpack-qemu.sh" \
+        /usr/bin/container-unpack-qemu
     # xmount
     local \
         xmount_installation="$moddir/binaries/xmount/trunk/build/release_build"
@@ -206,7 +207,7 @@ install() {
     inst_hook pre-udev 00 "$moddir/hooks/load-custom-kernel-modules.sh"
     # Get the openslx config from the servers configured in the kernel command
     # line (${SLX_SERVER}/${SLX_SERVER_BASE}/config).
-    inst_hook pre-mount 00 "$moddir/hooks/fetch-config.sh"
+    inst_hook pre-mount 10 "$moddir/hooks/fetch-config.sh"
     # make the final blockdevice for the root system (dnbd3 -> xmount ->
     # device-mapper)
     if dracut_module_included "systemd-initrd"; then
@@ -257,11 +258,11 @@ install() {
         basename bash blockdev \
         cat cut \
         dd diff dirname dmsetup \
-        find fsck.ext4 fsck.xfs \
+        find \
         grep \
         insmod \
         losetup lsblk \
-        mkfifo mkfs.ext4 mkfs.xfs mktemp mount mountpoint \
+        mkfifo mktemp mount mountpoint \
         sed sleep sort \
         tee touch tr \
         wget
-- 
cgit v1.2.3-55-g7522