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Enable /cache mount point

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Non-A/B devices using AOSP OTA flow will mount /cache in the
fstab file. Without setting BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE,
/cache will be a symlink to /data/cache which introduces the
failure of `mount_all /vendor/etc/fstab.{ro.hardware}`. This is
because all devices laucned in P need to switch to "system-as-root".

This CL sets board config to create /cache directory in rootfs
(system-as-root GSI image). Note that A/B devices doesn't mount
or use /cache so leaving an empty /cache in rootfs has no harm.

Bug: 78485405
Test: Boot GSI on walleye
Change-Id: Ic260d2917cc64c9497f5f60ea11303e953e80efd
This commit is contained in:
Bowgo Tsai
2018-05-09 21:57:49 +08:00
parent 0502416b95
commit 4e9ff91935
8 changed files with 40 additions and 0 deletions
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5
target/board/generic/BoardConfig.mk
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@@ -56,6 +56,11 @@ BOARD_FLASH_BLOCK_SIZE := 512
TARGET_USERIMAGES_SPARSE_EXT_DISABLED := true
DEVICE_MATRIX_FILE := device/generic/goldfish/compatibility_matrix.xml
# Set this to create /cache mount point for non-A/B devices that mounts /cache.
# The partition size doesn't matter, just to make build pass.
BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
BOARD_CACHEIMAGE_PARTITION_SIZE := 16777216
BOARD_SEPOLICY_DIRS += build/target/board/generic/sepolicy
BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true