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Use ext4 partitions for preinit first

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Fix #6841, close #6847
This commit is contained in:
topjohnwu 2023-04-08 20:30:40 -07:00
parent 1a16004b20
commit b4ae3493a6
1 changed files with 19 additions and 4 deletions
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23
native/src/core/bootstages.cpp
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@ -116,13 +116,17 @@ static void mount_mirrors() {
}
string find_preinit_device() {
enum {
enum part_t {
UNKNOWN,
PERSIST,
METADATA,
CACHE,
DATA,
} matched = UNKNOWN;
};
part_t ext4_type = UNKNOWN;
part_t f2fs_type = UNKNOWN;
bool encrypted = getprop("ro.crypto.state") == "encrypted";
bool mount = getuid() == 0 && getenv("MAGISKTMP");
bool make_dev = mount && getenv("MAKEDEV");
@ -136,6 +140,9 @@ string find_preinit_device() {
return basename(info.source.data());
if (info.root != "/" || info.source[0] != '/' || info.source.find("/dm-") != string::npos)
continue;
// Skip all non ext4 partitions once we found a matching ext4 partition
if (ext4_type != UNKNOWN && info.type != "ext4")
continue;
if (info.type != "ext4" && info.type != "f2fs")
continue;
auto flags = split_view(info.fs_option, ",");
@ -148,6 +155,7 @@ string find_preinit_device() {
continue;
}
part_t &matched = (info.type == "f2fs") ? f2fs_type : ext4_type;
switch (matched) {
case UNKNOWN:
if (info.target == "/persist" || info.target == "/mnt/vendor/persist") {
@ -175,7 +183,7 @@ string find_preinit_device() {
}
}
[[fallthrough]];
case DATA:
default:
continue;
}
@ -184,8 +192,15 @@ string find_preinit_device() {
preinit_dev = info.device;
}
preinit_source = info.source;
// Cannot find any better partition, stop finding
if (ext4_type == DATA)
break;
}
if (preinit_source.empty())
return "";
if (!preinit_dir.empty()) {
auto mirror_dir = string(getenv("MAGISKTMP")) + "/" PREINITMIRR;
mkdirs(preinit_dir.data(), 0700);
@ -196,7 +211,7 @@ string find_preinit_device() {
xmknod(dev_path.data(), S_IFBLK | 0600, preinit_dev);
}
}
return preinit_source.empty() ? "" : basename(preinit_source.data());
return basename(preinit_source.data());
}
static bool magisk_env() {