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
The sysfs nodes can change from devices to devices for
a particular class of peripheral. Some of them even change
after suspend/resume, e.g. rfkill for USB bluetooth adapters.
This patch adds to the way how ueventd rules with wildcard are
handled. In addition to matching the prefix with a trailing
wildcard, now rules can have wildcard anywhere in the rule.
The wildcard matching is implemented using fnmatch(), where
its matching is simliar to shell pathname expansion. It suits
this particular usage model well. To avoid abuse, the number of
slashes has to match between path name and the rule.
For example, instead of creating a rule to match:
/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/bluetooth/hci0/rfkill*
, this would suffice:
/sys/devices/pci0000:00/0000:00:1d.0/*/*/*/*/bluetooth/hci0/rfkill*
The prefix matching behavior is retained, such that those
rules do not have to pay for processing penalty with fnmatch().
Change-Id: I3ae6a39c838f6d12801cb71958e481b016f731f5
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This should be much nicer than peppering init.rc with chown/chmod
directives.
Also, remove some dead code and obsolete comments.
Change-Id: I10895f10a9cf2f1226c8d12976cd3db3743da9ec
