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| author | Hung-ying Tyan <tyanh@google.com> | 2016-02-01 15:07:40 +0800 |
|---|---|---|
| committer | Hung-ying Tyan <tyanh@google.com> | 2016-08-17 17:21:35 +0800 |
| commit | 99c4a8a6b3852c33828b03cbd0aef0c625957a39 (patch) | |
| tree | 33ad8010ef491bd0c4a8937ca1046c81d58b0009 /trusty/coverage/coverage.cpp | |
| parent | 7a746f3a6850198b7f1cad7f22befe9ca48b47fd (diff) | |
Mount /vendor and /odm early
Right now these two partitions are mounted in the fs stage of the init
process. As a result, many vendor/ODM files needed earlier in the boot
process (e.g., init.<hardware>.rc, fstab.<hardware>.rc,
uevent.<hardware>.rc, SELinux policy files etc) can only live on the root
partition.
To prevent vendors/ODMs from polluting the root partition, this patch makes
it possible to mount the vendor and ODM partitions in the first stage of the
init process. The fstab info of both partitions to be mounted early is
composed from new kernel cmdline arguments android.early.prefix and
android.early.fstab.
For example, with:
android.early.prefix=/sys/devices/1010000.msdc0/mmc_host/mmc0/mmc0:0001/block/mmcblk0/
android.early.fstab=mmcblk0p10+/odm+ext4+ro+verify\nmmcblk0p09+/vendor+ext4+ro+verify
the final fstab string will be:
/sys/devices/1010000.msdc0/mmc_host/mmc0/mmc0:0001/block/mmcblk0/mmcblk0p10 /odm ext4 ro verify
/sys/devices/1010000.msdc0/mmc_host/mmc0/mmc0:0001/block/mmcblk0/mmcblk0p09 /vendor ext4 ro verify
The android.early.prefix is optional. When it is missing, the final fstab
string will be directly converted from android.early.fstab.
This patch also makes sure that the early mounted partitions are dm-verity
enabled so that they are trust worthy to store system files.
BUG=27805372
Change-Id: I3cf32482a5ec65445ba3aedab2164c7ba8f12694
Diffstat (limited to 'trusty/coverage/coverage.cpp')
0 files changed, 0 insertions, 0 deletions