tree af8ad951ba6b34091461debb35c755c1531b2ead
parent 64e0a6525f6f82a67649602de3fe1ad62c837c27
author dianlujitao <dianlujitao@lineageos.org> 1543833947 +0800
committer Ethan Yonker <dees_troy@teamw.in> 1553202952 -0500

Fix the long broken format function

 * For EXT2/3:
   * Align mke2fs options with Android 9.0 fs_mgr_format.cpp.
 * For EXT4:
   * Note that make_ext4fs is still in use on Android 8.1 to workaround
     a FDE encryption bug even though mke2fs has become the default
     choice. The bug is fixed in Android 9.0+.
 * For F2FS:
   * Drop the broken "-r" option, it's never ported to O, explicitly
     pass number of sectors instead.
   * Keep all options aligned with Pie fs_mgr.
   * Check existence before start wiping, as Wipe_EXT4 does.
 * For all:
   * Calculate block size at runtime, and reserve the space specified
     via negative "length" option from fstab. Note that positive length
     will be ignored.
   * If the partition has crypto footer, and "length" is not specified
     in fstab, automatically reverse CRYPT_FOOTER_OFFSET (16384).
   * Remove the default crypto key location: footer, this is a bad
     assumption since most partitions don't use encryption! We need to
     know the real situation to decide whether to reserve crypto footer
     on format.
   * If the current action is "wipe" or "change filesystem", wipe crypto
     footer or block device after mkfs if the partition is
     unencrypted or undecrypted (e.g., wrong password).
   * If the current action is "format data", unconditionally wipe crypto
     footer or block device.

Change-Id: I7304a8ee703131ea4a08ab7c60334af28cac28b3