support metamodule, remove built-in overlayfs mount

Co-authored-by: weishu <twsxtd@gmail.com> Co-authored-by: YuKongA <70465933+YuKongA@users.noreply.github.com> Co-authored-by: Ylarod <me@ylarod.cn>
2025-11-20 20:13:08 +08:00
parent 8250c0ecc2
commit 954ecd9644
29 changed files with 1757 additions and 877 deletions
--- a/userspace/meta-overlayfs/metamodule/metainstall.sh
+++ b/userspace/meta-overlayfs/metamodule/metainstall.sh
@@ -0,0 +1,99 @@
+#!/system/bin/sh
+############################################
+# meta-overlayfs metainstall.sh
+# Module installation hook for ext4 image support
+############################################
+
+# Constants
+IMG_FILE="/data/adb/metamodule/modules.img"
+MNT_DIR="/data/adb/metamodule/mnt"
+
+# Ensure ext4 image is mounted
+ensure_image_mounted() {
+    if ! mountpoint -q "$MNT_DIR" 2>/dev/null; then
+        ui_print "- Mounting modules image"
+        mkdir -p "$MNT_DIR"
+        mount -t ext4 -o loop,rw,noatime "$IMG_FILE" "$MNT_DIR" || {
+            abort "! Failed to mount modules image"
+        }
+        ui_print "- Image mounted successfully"
+    else
+        ui_print "- Image already mounted"
+    fi
+}
+
+# Determine whether this module should be moved into the ext4 image.
+# We only relocate payloads that expose system/ overlays and do not opt out via skip_mount.
+module_requires_overlay_move() {
+    if [ -f "$MODPATH/skip_mount" ]; then
+        ui_print "- skip_mount flag detected; keeping files under /data/adb/modules"
+        return 1
+    fi
+
+    if [ ! -d "$MODPATH/system" ]; then
+        ui_print "- No system/ directory detected; keeping files under /data/adb/modules"
+        return 1
+    fi
+
+    return 0
+}
+
+# Copy SELinux contexts from src tree to destination by mirroring each entry.
+copy_selinux_contexts() {
+    command -v chcon >/dev/null 2>&1 || return 0
+
+    SRC="$1"
+    DST="$2"
+
+    if [ -z "$SRC" ] || [ -z "$DST" ] || [ ! -e "$SRC" ] || [ ! -e "$DST" ]; then
+        return 0
+    fi
+
+    chcon --reference="$SRC" "$DST" 2>/dev/null || true
+
+    find "$SRC" -print | while IFS= read -r PATH_SRC; do
+        if [ "$PATH_SRC" = "$SRC" ]; then
+            continue
+        fi
+        REL_PATH="${PATH_SRC#"${SRC}/"}"
+        PATH_DST="$DST/$REL_PATH"
+        if [ -e "$PATH_DST" ] || [ -L "$PATH_DST" ]; then
+            chcon --reference="$PATH_SRC" "$PATH_DST" 2>/dev/null || true
+        fi
+    done
+}
+
+# Post-installation: move partition directories to ext4 image
+post_install_to_image() {
+    ui_print "- Copying module content to image"
+
+    set_perm_recursive "$MNT_DIR" 0 0 0755 0644
+
+    MOD_IMG_DIR="$MNT_DIR/$MODID"
+    mkdir -p "$MOD_IMG_DIR"
+
+    # Move all partition directories
+    for partition in system vendor product system_ext odm oem; do
+        if [ -d "$MODPATH/$partition" ]; then
+            ui_print "- Copying $partition/"
+            cp -af "$MODPATH/$partition" "$MOD_IMG_DIR/" || {
+                ui_print "! Warning: Failed to move $partition"
+                continue
+            }
+            copy_selinux_contexts "$MODPATH/$partition" "$MOD_IMG_DIR/$partition"
+        fi
+    done
+}
+
+ui_print "- Using meta-overlayfs metainstall"
+
+install_module
+
+if module_requires_overlay_move; then
+    ensure_image_mounted
+    post_install_to_image
+else
+    ui_print "- Skipping move to modules image"
+fi
+
+ui_print "- Installation complete"