[archiso] Add /run/archiso/used_block_devices

This list includes block devices of:
* Boot medium [archisodevice] (only if no copytoram= is used)
* Loop medium [img_dev] (only if no copytoram= is used)
* COW space [cowdevice] (only if cowdevice= is used (no tmpfs is used))
* Loop devices used for SquashFS images.
* Loop devices used for device-mapper devices (two per each dm-device, one RO{*.fs} and one RW{*.cow})

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

2 files changed, 15 insertions, 1 deletions

diff --git a/archiso/hooks/archiso b/archiso/hooks/archiso
index abe9932..df5bb10 100644
--- a/archiso/hooks/archiso
+++ b/archiso/hooks/archiso
@@ -9,6 +9,7 @@ _mnt_fs() {
     local ro_dev ro_dev_size rw_dev
 
     ro_dev=$(losetup --find --show --read-only "${img}")
+    echo ${ro_dev} >> /run/archiso/used_block_devices
     ro_dev_size=$(blockdev --getsz ${ro_dev})
 
     if [[ "${cow_persistent}" == "P" ]]; then
@@ -28,10 +29,12 @@ _mnt_fs() {
     fi
 
     rw_dev=$(losetup --find --show "/run/archiso/cowspace/${cow_directory}/${img_name}.cow")
+    echo ${rw_dev} >> /run/archiso/used_block_devices
 
     echo "0 ${ro_dev_size} snapshot ${ro_dev} ${rw_dev} ${cow_persistent} 8" | dmsetup create ${dm_snap_name}
 
     _mnt_dev "/dev/mapper/${dm_snap_name}" "${newroot}${mnt}" "-w"
+    echo /dev/mapper/${dm_snap_name} >> /run/archiso/used_block_devices
     echo "/dev/mapper/${dm_snap_name} ${mnt} auto defaults 0 0" >> ${newroot}/etc/fstab
 }
 
@@ -52,6 +55,7 @@ _mnt_sfs() {
         msg "done."
     fi
     sfs_dev=$(losetup --find --show --read-only "${img}")
+    echo ${sfs_dev} >> /run/archiso/used_block_devices
     _mnt_dev "${sfs_dev}" "${mnt}" "-r"
 }
 
@@ -126,7 +130,13 @@ run_hook() {
 archiso_mount_handler() {
     local newroot="${1}"
 
-    mountpoint -q "/run/archiso/bootmnt" || _mnt_dev "${archisodevice}" "/run/archiso/bootmnt" "-r"
+    if ! mountpoint -q "/run/archiso/bootmnt"; then
+        _mnt_dev "${archisodevice}" "/run/archiso/bootmnt" "-r"
+        if [[ "${copytoram}" != "y" ]]; then
+            echo $(readlink -f ${archisodevice}) >> /run/archiso/used_block_devices
+        fi
+    fi
+
 
     if [[ ! -f "${aitab}" ]]; then
         echo "ERROR: '${aitab}' file does not exist."
@@ -159,6 +169,7 @@ archiso_mount_handler() {
 
     if [[ -n "${cow_device}" ]]; then
         _mnt_dev "${cow_device}" "/run/archiso/cowspace" "-r"
+        echo $(readlink -f ${cow_device}) >> /run/archiso/used_block_devices
         mount -o remount,rw "/run/archiso/cowspace"
     else
         msg ":: Mounting /run/archiso/cowspace (tmpfs) filesystem, size=${cowspace_size}..."
diff --git a/archiso/hooks/archiso_loop_mnt b/archiso/hooks/archiso_loop_mnt
index 4fa2910..61ddcd4 100644
--- a/archiso/hooks/archiso_loop_mnt
+++ b/archiso/hooks/archiso_loop_mnt
@@ -14,6 +14,9 @@ archiso_loop_mount_handler () {
 
     msg ":: Setup a loop device from ${img_loop} located at device ${img_dev}"
     _mnt_dev "${img_dev}" "/run/archiso/img_dev" "-r"
+    if [[ "${copytoram}" != "y" ]]; then
+        echo $(readlink -f ${img_dev}) >> /run/archiso/used_block_devices
+    fi
 
     if ! _dev_loop=$(losetup --find --show --read-only "/run/archiso/img_dev/${img_loop}"); then
         echo "ERROR: Setting loopback device for file '/run/archiso/img_dev/${img_loop}'"