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umount for ksu 10763 (#20)

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Signed-off-by: 5ec1cff <ewtqyqyewtqyqy@gmail.com>
This commit is contained in:
5ec1cff
2023-04-20 13:36:08 +08:00
committed by GitHub
parent 3772e23473
commit 250b4b2f8c
1 changed files with 6 additions and 52 deletions
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58
loader/src/injector/unmount.cpp
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@@ -10,12 +10,8 @@ using namespace std::string_view_literals;
namespace { namespace {
constexpr auto MODULE_DIR = "/data/adb/modules"; constexpr auto MODULE_DIR = "/data/adb/modules";
constexpr auto KSU_OVERLAY_SOURCE = "KSU";
struct overlay_backup { const std::vector<std::string> KSU_PARTITIONS{"/system", "/vendor", "/product", "/system_ext", "/odm", "/oem"};
std::string target;
std::string vfs_option;
std::string fs_option;
};
void lazy_unmount(const char* mountpoint) { void lazy_unmount(const char* mountpoint) {
if (umount2(mountpoint, MNT_DETACH) != -1) { if (umount2(mountpoint, MNT_DETACH) != -1) {
@@ -26,16 +22,9 @@ namespace {
} }
} }
#define PARSE_OPT(name, flag) \
if (opt == (name)) { \
flags |= (flag); \
return true; \
}
void revert_unmount_ksu() { void revert_unmount_ksu() {
std::string ksu_loop; std::string ksu_loop;
std::vector<std::string> targets; std::vector<std::string> targets;
std::list<overlay_backup> backups;
// Unmount ksu module dir last // Unmount ksu module dir last
targets.emplace_back(MODULE_DIR); targets.emplace_back(MODULE_DIR);
@@ -50,17 +39,10 @@ void revert_unmount_ksu() {
targets.emplace_back(info.target); targets.emplace_back(info.target);
} }
// Unmount ksu overlays // Unmount ksu overlays
if (info.type == "overlay") { if (info.type == "overlay"
if (str_contains(info.fs_option, MODULE_DIR)) { && info.source == KSU_OVERLAY_SOURCE
targets.emplace_back(info.target); && std::find(KSU_PARTITIONS.begin(), KSU_PARTITIONS.end(), info.target) != KSU_PARTITIONS.end()) {
} else { targets.emplace_back(info.target);
auto backup = overlay_backup{
.target = info.target,
.vfs_option = info.vfs_option,
.fs_option = info.fs_option,
};
backups.emplace_back(backup);
}
} }
} }
for (auto& info: parse_mount_info("self")) { for (auto& info: parse_mount_info("self")) {
@@ -74,34 +56,6 @@ void revert_unmount_ksu() {
for (auto& s: reversed(targets)) { for (auto& s: reversed(targets)) {
lazy_unmount(s.data()); lazy_unmount(s.data());
} }
// Affirm unmounted system overlays
for (auto& info: parse_mount_info("self")) {
if (info.type == "overlay") {
backups.remove_if([&](overlay_backup& mnt) {
return mnt.target == info.target && mnt.fs_option == info.fs_option;
});
}
}
// Restore system overlays
for (auto& mnt: backups) {
auto opts = split_str(mnt.vfs_option, ",");
opts.splice(opts.end(), split_str(mnt.fs_option, ","));
unsigned long flags = 0;
opts.remove_if([&](auto& opt) {
PARSE_OPT(MNTOPT_RO, MS_RDONLY)
PARSE_OPT(MNTOPT_NOSUID, MS_NOSUID)
PARSE_OPT("relatime", MS_RELATIME)
return false;
});
auto mnt_data = join_str(opts, ",");
if (mount("overlay", mnt.target.data(), "overlay", flags, mnt_data.data()) != -1) {
LOGD("Remounted (%s)", mnt.target.data());
} else {
PLOGE("Remount (%s, %s)", mnt.target.data(), mnt.fs_option.data());
}
}
} }
void revert_unmount_magisk() { void revert_unmount_magisk() {