1. Improve the Linux remount feature to make the ISO partition mountable out of the box on mainstream desktop distros.

2. Change the ISO partition dm name to stable /dev/mapper/VentoyPart

IMG/cpio/ventoy/hook/arch/ventoy-uauto-exec.sh

@@ -0,0 +1,9 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+vtlog "####### $0 $* ########"
+
+ventoy_copy_udev_auto_rules

IMG/cpio/ventoy/hook/arch/ventoy-uauto-hook.sh

@@ -0,0 +1,16 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+vtlog "####### $0 $* ########"
+
+vtoy_udev_auto_hook() {
+    if grep -q 'break.*=.*postmount' /init; then
+        vtlog "udev auto before postmount"
+        sed "/break.*=.*postmount/i\\$BUSYBOX_PATH/sh $VTOY_PATH/hook/manjaro/ventoy-uauto-exec.sh"  -i /init
+    fi
+}
+
+vtoy_udev_auto_hook

IMG/cpio/ventoy/hook/debian/ventoy-curtin-wa.conf

@@ -0,0 +1,3 @@
+[Unit]
+Wants=ventoy-curtin-wa.service
+After=ventoy-curtin-wa.service

IMG/cpio/ventoy/hook/debian/ventoy-curtin-wa.service

@@ -0,0 +1,8 @@
+[Unit]
+Description=Ventoy subiquity curtin Workaround
+
+[Service]
+Type=oneshot
+ExecStart=/etc/ventoy/ventoy-curtin-wa.sh
+PrivateMounts=no
+ProtectSystem=no

IMG/cpio/ventoy/hook/debian/ventoy-curtin-wa.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+exec >> /var/log/ventoy-curtin-wa.log 2>&1
+set -x
+
+if [ -e /tmp/ventoy_storage_config.py ]; then
+    echo "no need to patch again"
+elif [ -d /snap/ubuntu-desktop-bootstrap/current/lib ]; then
+    PyVer=$(ls -1 /snap/ubuntu-desktop-bootstrap/current/lib | grep -m1 python)
+    echo "Python Path: $PyVer"
+
+    OldFile=/snap/ubuntu-desktop-bootstrap/current/lib/$PyVer/site-packages/curtin/storage_config.py
+    NewFile=/tmp/ventoy_storage_config.py
+
+    if [ -e $OldFile ]; then
+        echo "Patch curtin storage config script"
+        cp -a $OldFile $NewFile
+
+        #skip Ventoy dm device
+        sed 's#\(if *\(.*\)\[.MAJOR.\] *in *\["11", *"2"\]\)#\1 or re.match(r"[vV]entoy.*|vtoy.*", \2.get("DM_NAME") or "")#g' -i $NewFile
+        mount --bind $NewFile $OldFile
+    else
+        echo "curin file not exist"
+    fi
+else
+    echo "curin snap dir not exit"
+fi

IMG/cpio/ventoy/hook/debian/ventoy-hook.sh

@@ -60,7 +60,7 @@ ventoy_get_debian_distro() {
         fi
         if $GREP -q 'NAME="Kylin"' /etc/os-release; then
             echo 'kylin'; return
-        fi        
+        fi
     fi
 
     if $GREP -q 'slax/' /proc/cmdline; then

IMG/cpio/ventoy/hook/debian/ventoy-uauto-exec.sh

@@ -0,0 +1,36 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+vtlog "####### $0 $* ########"
+
+subiquity_curtin_workaround() {
+    mkdir -p /root/etc/ventoy
+    ventoy_copy_file /ventoy/hook/debian/ventoy-curtin-wa.sh        /root/etc/ventoy/ventoy-curtin-wa.sh       0755
+    ventoy_copy_file /ventoy/hook/debian/ventoy-curtin-wa.conf      /root/etc/ventoy/ventoy-curtin-wa.conf     0644
+    ventoy_copy_file /ventoy/hook/debian/ventoy-curtin-wa.service   /root/etc/ventoy/ventoy-curtin-wa.service  0644
+
+    ln -sf /etc/ventoy/ventoy-curtin-wa.service /root/etc/systemd/system/ventoy-curtin-wa.service
+
+    vtDepDir=/root/etc/systemd/system/snap.ubuntu-desktop-bootstrap.subiquity-server.service.d
+    mkdir -p $vtDepDir
+    ln -sf /etc/ventoy/ventoy-curtin-wa.conf $vtDepDir/10-ventoy-curtin-wa.conf
+}
+
+
+if [ -d /root/etc/systemd/system -a -d /root/etc/udev/rules.d ]; then
+    vtlog "systemd udev check OK"
+
+    ventoy_copy_udev_auto_rules
+
+    if ls /root/etc/udev/rules.d | grep -q 'snap.*desktop'; then
+        subiquity_curtin_workaround
+    else
+        vtlog "no snap desktop detected"
+    fi
+else
+    vtlog "systemd or udev not exist"
+fi
+

IMG/cpio/ventoy/hook/debian/ventoy-uauto-hook.sh

@@ -0,0 +1,28 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+vtlog "####### $0 $* ########"
+
+vtoy_udev_auto_hook() {
+    if [ -e /etc/os-release ]; then
+        if grep -q 'ID=ubuntu' /etc/os-release; then
+            if egrep -q 'VERSION_ID=\"2[2-9]\.|VERSION_ID=\"3[0-9]\.' /etc/os-release; then
+                vtlog "ubuntu distro"
+                sed "/^mountroot$/a\\$BUSYBOX_PATH/sh $VTOY_PATH/hook/debian/ventoy-uauto-exec.sh"  -i /init
+                return
+            fi
+        fi
+    fi
+    
+    
+    if [ -e /init ] && $GREP -q '^mountroot$' /init; then
+        vtlog "mountroot distro"
+        sed "/^mountroot$/a\\$BUSYBOX_PATH/sh $VTOY_PATH/hook/debian/ventoy-uauto-exec.sh"  -i /init
+        return
+    fi
+}
+
+vtoy_udev_auto_hook

IMG/cpio/ventoy/hook/default/11-ventoy-dm.rules

@@ -1,25 +1,12 @@
-ACTION=="add", SUBSYSTEM=="block", KERNEL=="dm-*", \
+ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="dm-*", \
     ENV{DM_NAME}=="[vV]entoy*", \
     ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}="", \
     ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="", \
     ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=""
 
-ACTION=="add", SUBSYSTEM=="block", KERNEL=="dm-*", \
+ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="dm-*", \
     ENV{DM_NAME}=="vtoy*", \
     ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}="", \
     ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="", \
     ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=""
 
-ACTION=="change", SUBSYSTEM=="block", KERNEL=="dm-*", \
-    ENV{DM_NAME}=="[vV]entoy*", \
-    ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}="", \
-    ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="", \
-    ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=""
-
-ACTION=="change", SUBSYSTEM=="block", KERNEL=="dm-*", \
-    ENV{DM_NAME}=="vtoy*", \
-    ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}="", \
-    ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="", \
-    ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=""
-
-

IMG/cpio/ventoy/hook/default/90-ventoy-auto.rules

@@ -1,30 +1,12 @@
 
-ACTION=="add", SUBSYSTEM=="block", KERNEL=="dm-*", \
-    ENV{DM_NAME}=="VentoyPart", \
+ACTION=="add|change", SUBSYSTEM=="block", KERNEL=="DMXXX", \
     ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}="", \
     ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="", \
     ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="", \
-    ENV{ID_FS_LABEL}="VentoyPart", \
-    ENV{ID_FS_LABEL_ENC}="VentoyPart", \
-    ENV{UDISKS_FILESYSTEM_LABEL}="VentoyPart", \
-    ENV{UDISKS_PRESENTATION_NAME}="VentoyPart", \
     ENV{UDISKS_SYSTEM}="0", \
     ENV{UDISKS_REMOVABLE}="1", \
     ENV{UDISKS_AUTO}="1", \
     ENV{UDISKS_AUTOMOUNTABLE}="1"
 
 
-ACTION=="change", SUBSYSTEM=="block", KERNEL=="dm-*", \
-    ENV{DM_NAME}=="VentoyPart", \
-    ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}="", \
-    ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="", \
-    ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="", \
-    ENV{ID_FS_LABEL}="VentoyPart", \
-    ENV{ID_FS_LABEL_ENC}="VentoyPart", \
-    ENV{UDISKS_FILESYSTEM_LABEL}="VentoyPart", \
-    ENV{UDISKS_PRESENTATION_NAME}="VentoyPart", \
-    ENV{UDISKS_SYSTEM}="0", \
-    ENV{UDISKS_REMOVABLE}="1", \
-    ENV{UDISKS_AUTO}="1", \
-    ENV{UDISKS_AUTOMOUNTABLE}="1"
-
+KERNEL=="yyy", SUBSYSTEM=="block", ENV{UDISKS_IGNORE}="1"

IMG/cpio/ventoy/hook/default/ventoy-pivot-selinux-off.sh

@@ -0,0 +1,14 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+vtlog "####### $0 $* ########"
+
+for vroot in sysroot newroot root; do
+    if [ -e $vroot/etc/selinux/config ]; then
+        $SED "s/SELINUX=enforcing/SELINUX=permissive/g" -i $vroot/etc/selinux/config
+        break
+    fi
+done
+
+$BUSYBOX_PATH/true

IMG/cpio/ventoy/hook/default/ventoy-pivot-udev-rule.sh

@@ -1,15 +1,9 @@
-#!/bin/sh
+#!/ventoy/busybox/sh
 
-for vroot in sysroot newroot; do
-    if [ -d $vroot/etc ]; then
-        if [ -d $vroot/etc/udev/rules.d ]; then
-            :
-        else
-            mkdir -p $vroot/etc/udev/rules.d
-        fi
-        
-        cp -a /ventoy/hook/default/90-ventoy-auto.rules  $vroot/etc/udev/rules.d/
-        chmod 0644 $vroot/etc/udev/rules.d/90-ventoy-auto.rules
-        break
-    fi
-done
+. /ventoy/hook/ventoy-hook-lib.sh
+
+vtlog "####### $0 $* ########"
+
+ventoy_copy_udev_auto_rules
+
+$BUSYBOX_PATH/true

IMG/cpio/ventoy/hook/default/ventoy-udev-trigger.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Ventoy DM device udev attributes
+After=systemd-udevd.service
+
+[Service]
+Type=oneshot
+ExecStart=-udevadm trigger --subsystem-match=block --sysname-match=DMXXX
+ExecStart=udevadm settle
+
+[Install]
+WantedBy=sysinit.target

IMG/cpio/ventoy/hook/manjaro/ventoy-uauto-exec.sh

@@ -0,0 +1,9 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+vtlog "####### $0 $* ########"
+
+ventoy_copy_udev_auto_rules

IMG/cpio/ventoy/hook/manjaro/ventoy-uauto-hook.sh

@@ -0,0 +1,16 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+vtlog "####### $0 $* ########"
+
+vtoy_udev_auto_hook() {
+    if grep -q 'break.*=.*postmount' /init; then
+        vtlog "udev auto before postmount"
+        sed "/break.*=.*postmount/i\\$BUSYBOX_PATH/sh $VTOY_PATH/hook/manjaro/ventoy-uauto-exec.sh"  -i /init
+    fi
+}
+
+vtoy_udev_auto_hook

IMG/cpio/ventoy/hook/rhel7/ventoy-uauto-hook.sh

@@ -0,0 +1,22 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+vtlog "####### $0 $* ########"
+
+vtoy_udev_auto_hook() {
+    if [ -e /etc/os-release ]; then
+        if grep -q 'ID=fedora' /etc/os-release; then
+            if grep -q 'VERSION_ID=[3-9][0-9]' /etc/os-release; then
+                vtlog "fedora distro"
+                ventoy_dracut_pivot_udev_rule
+                ventoy_dracut_pivot_selinux_off
+                return
+            fi
+        fi
+    fi
+}
+
+vtoy_udev_auto_hook

IMG/cpio/ventoy/hook/ventoy-hook-lib.sh

@@ -64,6 +64,14 @@ vterr() {
 }
 
 
+ventoy_copy_file() {
+    cp -a "$1" "$2"
+    if [ -n "$3" ]; then
+        chmod $3 "$2"
+    fi
+}
+
+
 is_ventoy_hook_finished() {
     [ -e $VTOY_PATH/hook_finish ]
 }
@@ -77,7 +85,7 @@ set_ventoy_hook_finish() {
         echo "### iso part dm cmd" >> $VTLOG
         $CAT /ventoy/ventoy_iso_part_dm_cmd >> $VTLOG        
         $BUSYBOX_PATH/sh /ventoy/ventoy_iso_part_dm_cmd >>$VTLOG 2>&1        
-        #$BUSYBOX_PATH/rm -f /ventoy/ventoy_iso_part_dm_cmd
+        $BUSYBOX_PATH/mv /ventoy/ventoy_iso_part_dm_cmd  /ventoy/ventoy_iso_part_dm_cmd_bk
     fi
 }
 
@@ -275,9 +283,8 @@ create_ventoy_device_mapper() {
     fi
 
     RAWDISKNAME=$($HEAD -n1 $VTOY_PATH/ventoy_raw_table | $AWK '{print $4}')    
-    echo "$VT_DM_BIN create  VentoyPart  $VTOY_PATH/ventoy_raw_table"  > /ventoy/ventoy_iso_part_dm_cmd    
-    #echo "$VT_DM_BIN mknodes VentoyPart"                              >> /ventoy/ventoy_iso_part_dm_cmd    
-    #echo "$VT_DM_BIN ls"                                                        >> /ventoy/ventoy_iso_part_dm_cmd    
+    echo "$VT_DM_BIN create  VentoyPart  $VTOY_PATH/ventoy_raw_table"  >  /ventoy/ventoy_iso_part_dm_cmd
+    echo "echo 1 > $VTOY_PATH/ventoy_raw_dm_done"                      >> /ventoy/ventoy_iso_part_dm_cmd
 }
 
 create_ventoy_loop_device_mapper() {
@@ -739,15 +746,9 @@ ventoy_remove_all_dm() {
     $VTOY_PATH/tool/dmsetup remove ventoy >> $VTLOG 2>&1
     rm -f /dev/ventoy*
 
-    if [ -e $VTOY_PATH/ventoy_raw_table ]; then
-        RAWDISKNAME=$($HEAD -n1 $VTOY_PATH/ventoy_raw_table | $AWK '{print $4}')
-        DMRAWDISKNAME=${RAWDISKNAME#/dev/}
-        if $VTOY_PATH/tool/dmsetup ls | $GREP -qw "$DMRAWDISKNAME"; then
-            vtlog "dmsetup remove ${DMRAWDISKNAME}"
-            $VTOY_PATH/tool/dmsetup remove "$DMRAWDISKNAME"
-        else
-            vtlog "no need to remove DM ${DMRAWDISKNAME}"
-        fi
+    if [ -e $VTOY_PATH/ventoy_raw_dm_done ]; then
+        vtlog "dmsetup remove VentoyPart"
+        $VTOY_PATH/tool/dmsetup remove VentoyPart
         rm -f $VTOY_PATH/ventoy_iso_part_dm_cmd
     fi
 
@@ -1011,3 +1012,59 @@ ventoy_mount_iso() {
 
     $BUSYBOX_PATH/false
 }
+
+ventoy_init_udev_auto_rules() {
+    ventoy_copy_file /ventoy/hook/default/11-ventoy-dm.rules  /etc/udev/rules.d/11-ventoy-dm.rules  0644
+}
+
+ventoy_copy_udev_auto_rules() {
+    if ! [ -e $VTOY_PATH/ventoy_raw_dm_done ]; then
+        vtlog "ventoy_raw_dm_done not exist, no need for udev auto rule"
+        return
+    fi
+
+    vtlog "==== Copy udev auto rules ===="
+    for vroot in sysroot newroot new_root root; do
+        if [ -d $vroot/etc/udev/rules.d ]; then
+            cp -a /ventoy/hook/default/90-ventoy-auto.rules /ventoy/udevtmp.rules
+        
+            vtDM=$($VTOY_PATH/tool/dmsetup info VentoyPart | $GREP Major | $SED "s/.*[^0-9]\([0-9][0-9]*\)$/\1/")
+            $SED "s/DMXXX/dm-${vtDM}/g" -i /ventoy/udevtmp.rules
+
+            vtRAWDISKNAME=$($HEAD -n1 $VTOY_PATH/ventoy_raw_table | $AWK '{print $4}')
+            $SED "s/yyy/${vtRAWDISKNAME#/dev/}/g" -i /ventoy/udevtmp.rules
+
+            vtlog "VentoyPart is /dev/dm-${vtDM} map to $vtRAWDISKNAME"
+
+            ventoy_copy_file /ventoy/udevtmp.rules  $vroot/etc/udev/rules.d/90-ventoy-auto.rules  0644
+            ventoy_copy_file /ventoy/udevtmp.rules  $vroot/etc/udev/rules.d/11-ventoy-auto.rules  0644
+            
+            if [ -d $vroot/etc/systemd/system/sysinit.target.wants ]; then
+                vtlog "copy udev trigger service"
+                cp -a /ventoy/hook/default/ventoy-udev-trigger.service /ventoy/udevtmp.service
+                $SED "s/DMXXX/dm-${vtDM}/g" -i /ventoy/udevtmp.service
+                ventoy_copy_file /ventoy/udevtmp.service  $vroot/etc/systemd/system/ventoy-udev-trigger.service  0644
+                
+                mkdir -p $vroot/etc/systemd/system-preset
+                echo 'enable ventoy-udev-trigger.service' > $vroot/etc/systemd/system-preset/80-ventoy-udev.preset
+
+                $BUSYBOX_PATH/ln -sf /etc/systemd/system/ventoy-udev-trigger.service $vroot/etc/systemd/system/sysinit.target.wants/ventoy-udev-trigger.service
+            else
+                vtlog "sysinit wants dir not exist"
+            fi
+
+            break
+        fi
+    done
+}
+
+ventoy_dracut_pivot_udev_rule() {
+    echo "#!/bin/sh" > $VT_DRACUT_HOOKS/pre-pivot/99-ventoy-udev-rules.sh
+    echo "/ventoy/busybox/sh $VTOY_PATH/hook/default/ventoy-pivot-udev-rule.sh" >> $VT_DRACUT_HOOKS/pre-pivot/99-ventoy-udev-rules.sh
+}
+
+ventoy_dracut_pivot_selinux_off() {
+    echo "#!/bin/sh" > $VT_DRACUT_HOOKS/pre-pivot/99-ventoy-selinux-off.sh
+    echo "/ventoy/busybox/sh $VTOY_PATH/hook/default/ventoy-pivot-selinux-off.sh" >> $VT_DRACUT_HOOKS/pre-pivot/99-ventoy-selinux-off.sh
+}
+

IMG/cpio/ventoy/hook/ventoy-os-lib.sh

@@ -71,11 +71,6 @@ ventoy_add_udev_auto_rule() {
 }
 
 
-ventoy_dracut_pivot_udev_rule() {
-    cp -a $VTOY_PATH/hook/default/ventoy-pivot-udev-rule.sh  $VT_DRACUT_HOOKS/pre-pivot/99-ventoy-udev-rules.sh
-}
-
-
 ventoy_add_kernel_udev_rule() {
     VT_UDEV_RULE_PATH=$(ventoy_get_udev_conf_path)
     echo "KERNEL==\"$1\", $VT_UDEV_RULE_PREFIX RUN+=\"$2\"" >> $VT_UDEV_RULE_PATH

IMG/cpio/ventoy/ventoy_chain.sh

@@ -415,6 +415,9 @@ echo "OS=###${VTOS}###" >>$VTLOG
 if [ -e "$VTOY_PATH/hook/$VTOS/ventoy-hook.sh" ]; then
     $BUSYBOX_PATH/sh "$VTOY_PATH/hook/$VTOS/ventoy-hook.sh"
 fi
+if [ -e "$VTOY_PATH/hook/$VTOS/ventoy-uauto-hook.sh" ]; then
+    $BUSYBOX_PATH/sh "$VTOY_PATH/hook/$VTOS/ventoy-uauto-hook.sh"
+fi
 
 
 

INSTALL/tool/create_ventoy_iso_part_dm.sh

@@ -14,8 +14,8 @@ if dmsetup -h > /dev/null 2>&1; then
     for t in *; do
         if grep -q "^${VPART_MAJOR_MINOR}$" $t/dev; then
             VPART=$t
-            echo 0 $(cat /sys/class/block/$VPART/size) linear /dev/$VPART 0 | dmsetup create $VPART
-            dmsetup mknodes "$VPART" > /dev/null 2>&1
+            echo 0 $(cat /sys/class/block/$VPART/size) linear /dev/$VPART 0 | dmsetup create VentoyPart
+            dmsetup mknodes "VentoyPart" > /dev/null 2>&1
             break
         fi
     done
@@ -30,7 +30,7 @@ if dmsetup -h > /dev/null 2>&1; then
             udevadm trigger --type=devices --action=add  > /dev/null 2>&1
             udevadm settle > /dev/null 2>&1
         fi
-        echo "Create /dev/mapper/$VPART success"
+        echo "Create /dev/mapper/VentoyPart success"
     fi    
 else
     echo "dmsetup program not avaliable"