backslashxx/mountify

Globally mounted modules via OverlayFS.

Mountify

Globally mounted modules and whiteouts via OverlayFS.

• mostly meant for MKSU .nomount
• tries to mimic an OEM mount, like /mnt/vendor/my_bigball
• susfs is recommended for hiding mounts
• requires CONFIG_OVERLAY_FS=y and CONFIG_TMPFS_XATTR=y
• globally mounting huge modules is discouraged

Methodology

module mount

1. copies contents of /data/adb/modules/module_id to /debug_ramdisk/mountify/module_id
2. mirrors SELinux context of every file from /data/adb/modules/module_id to /debug_ramdisk/mountify/module_id
3. bind mounts /debug_ramdisk/mountify/module_id to /mnt/vendor/fake_folder_name
4. overlays /mnt/vendor/fake_folder_name/system/bin to /system/bin

whiteouts

1. generate whiteouts on /debug_ramdisk/mountify/wo
2. bind mounts /debug_ramdisk/mountify/wo to /mnt/vendor/my_super
3. overlays /mnt/vendor/my_super/system/bin to /system/bin

Usage

• edit config.sh, mountify_mounts=1 then modify modules.txt to list modules you want mounted.

module_id fake_folder_name

• edit config.sh, mountify_whiteouts=1 then modify whiteouts.txt for files you want whited out.

/system/bin/find

Limitations

• For whiteouts they have to be two folders deep, e.g. /system/bin/find works but not /system/addon.d
• Another is that whiteouts tend to fail on most setups.
• I still do NOT know why. <insert we just dont know gif>

Support / Warranty

• None, none at all. I am handing you a sharp knife, it is not on me if you stab yourself with it.

Links

Download