When the modem setup is done is init.efs.rc file,
there is boot time regression in the 4kb configuration.
Bug: 374435821
Flag: EXEMPT bugfix
Test: Build and tested in abtd
Change-Id: I909f9eb45f783fda45e7782419845d236c263aa0
There are 4 partitions that are flashed at the factory and use F2FS fs with
4kb block size:
- /dev/block/by-name/efs
- /dev/block/by-name/efs_backup
- /dev/block/by-name/modem_userdata
- /dev/block/by-name/persist
These partitions can NOT be mounted by 16kb kernels because F2FS
expects BLOCK_SIZE == PAGE_SIZE.
In order to access the files in these partitions by 16kb kernels,
the dump.f2fs tool is used.
This change will perform these steps at boot time ONLY for 16kb mode. For
every partition (efs/efs_backup/modem_userdata/persist):
1. Use dump.f2fs to copy the content of the partition
to /data/vendor/copied/<partition name>.img.
2. If the copy was succesfull, rename /data/vendor/copied/<partition name>.img
to /data/vendor/copied/<partition name>
3. fsync the content of the directory /data/vendor/copied/<partition name>.
After the content of the partitions is in /data/vendor/copied,
bind-mount the partitions to the directory /mnt/vendor. See conf/fstab.efs.from_data.
Note: This change ONLY applies to 16kb kernels. This change does not modify
the original partitions.
Bug: 347015136
Bug: 362368691
Test: $ source build/envsetup.sh
$ lunch [zumapro]-trunk_staging-userdebug
$ m
$ ./vendor/google/tools/flashall -w
Flag: EXEMPT bugfix
Change-Id: Idf46a2a3a4f0b2e91ee4a0322a0c469e055684c8
