Commit e1bcd933 authored Sep 10, 2020 by Tom Cherry

init: do not create dev.mnt. properties for emulated mounts

dev.mnt. properties are primarily intended for tuning parameters for
mounts such as /system and /data but don't have much use for emulated
mounts.

There are additional emulated mounts created for each user on a
device, so if too many users are created, init would otherwise create
too many dev.mnt. properties, filling the property file that backs
these properties, and preventing more properties from being
generated.

Therefore, this change stops init from creating dev.mnt. properties
for emulated mounts.

Bug: 156721033
Test: user creation stress test doesn't create large numbers of
properties

Change-Id: I6475956719b7c938b8289189abfef661140d526d

parent 29e7b2af

init/mount_handler.cpp

+5 −1

Original line number	Diff line number	Diff line
		@@ -130,7 +130,11 @@ void MountHandler::MountHandlerFunction() {
		char* buf = nullptr;
		size_t len = 0;
		while (getline(&buf, &len, fp_.get()) != -1) {
		auto entry = ParseMount(std::string(buf));
		auto buf_string = std::string(buf);
		if (buf_string.find("/emulated") != std::string::npos) {
		continue;
		}
		auto entry = ParseMount(buf_string);
		auto match = untouched.find(entry);
		if (match == untouched.end()) {
		touched.emplace_back(std::move(entry));