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Move MagiskInit::prepare_data to rust

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This commit is contained in:
LoveSy 2025-01-30 20:29:50 +08:00 committed by John Wu
parent a85c4c6528
commit 449204e380
3 changed files with 32 additions and 12 deletions
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5
native/src/init/lib.rs
View File

@ -55,6 +55,10 @@ pub mod ffi {
fn reset_overlay_contexts();
unsafe fn start_magisk_init(argv: *mut *mut c_char);
}
extern "Rust" {
fn prepare_data(self: &MagiskInit);
}
unsafe extern "C++" {
include!("../base/include/base.hpp");
@ -70,7 +74,6 @@ pub mod ffi {
unsafe fn setup_tmp(self: &MagiskInit, path: *const c_char);
fn collect_devices(self: &MagiskInit);
fn mount_preinit_dir(self: &MagiskInit);
fn prepare_data(self: &MagiskInit);
unsafe fn find_block(self: &MagiskInit, partname: *const c_char) -> u64;
fn mount_system_root(self: &mut MagiskInit) -> bool;

10
native/src/init/mount.cpp
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@ -221,16 +221,6 @@ void MagiskInit::exec_init() const noexcept {
exit(1);
}
void MagiskInit::prepare_data() const noexcept {
LOGD("Setup data tmp\n");
xmkdir("/data", 0755);
xmount("magisk", "/data", "tmpfs", 0, "mode=755");
cp_afc("/init", REDIR_PATH);
cp_afc("/.backup", "/data/.backup");
cp_afc("/overlay.d", "/data/overlay.d");
}
void MagiskInit::setup_tmp(const char *path) const noexcept {
LOGD("Setup Magisk tmp at %s\n", path);
chdir("/data");

29
native/src/init/mount.rs
View File

@ -7,10 +7,11 @@ use std::{
use cxx::CxxString;
use crate::ffi::MagiskInit;
use base::{
cstr, debug,
libc::{chdir, chroot, mount, MS_MOVE},
parse_mount_info, raw_cstr, Directory, LibcReturn, LoggedResult, StringExt, Utf8CStr,
parse_mount_info, raw_cstr, Directory, FsPath, LibcReturn, LoggedResult, StringExt, Utf8CStr,
};
pub fn switch_root(path: &Utf8CStr) {
@ -68,3 +69,29 @@ pub fn is_device_mounted(dev: u64, target: Pin<&mut CxxString>) -> bool {
}
false
}
impl MagiskInit {
pub(crate) fn prepare_data(&self) {
debug!("Setup data tmp");
fn inner() -> LoggedResult<()> {
FsPath::from(cstr!("/data")).mkdir(0o755)?;
unsafe {
mount(
raw_cstr!("magisk"),
raw_cstr!("/data"),
raw_cstr!("tmpfs"),
0,
raw_cstr!("mode=755").cast(),
)
}
.as_os_err()?;
FsPath::from(cstr!("/init")).copy_to(FsPath::from(cstr!("/data/magiskinit")))?;
FsPath::from(cstr!("/.backup")).copy_to(FsPath::from(cstr!("/data/.backup")))?;
FsPath::from(cstr!("/overlay.d")).copy_to(FsPath::from(cstr!("/data/overlay.d")))?;
Ok(())
}
inner().ok();
}
}