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Separate SAR and legacy implementation

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This commit is contained in:
topjohnwu
2019-06-16 12:45:32 -07:00
parent f1d9015e5f
commit 5c7f69acaa
4 changed files with 140 additions and 107 deletions
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76
native/jni/init/early_mount.cpp
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@ -5,6 +5,7 @@
#include <utils.h>
#include <logging.h>
#include <selinux.h>
#include "init.h"
@ -73,7 +74,7 @@ static void setup_block(const char *partname, char *block_dev) {
}
}
bool MagiskInit::read_dt_fstab(const char *name, char *partname, char *fstype) {
bool BaseInit::read_dt_fstab(const char *name, char *partname, char *fstype) {
char path[128];
int fd;
sprintf(path, "%s/fstab/%s/dev", cmd->dt_dir, name);
@ -106,38 +107,57 @@ if (!is_lnk("/" #name) && read_dt_fstab(#name, partname, fstype)) { \
mnt_##name = true; \
}
void MagiskInit::early_mount() {
void LegacyInit::early_mount() {
char partname[32];
char fstype[32];
char block_dev[64];
if (cmd->system_as_root) {
LOGD("Early mount system_root\n");
sprintf(partname, "system%s", cmd->slot);
setup_block(partname, block_dev);
xmkdir("/system_root", 0755);
if (xmount(block_dev, "/system_root", "ext4", MS_RDONLY, nullptr))
xmount(block_dev, "/system_root", "erofs", MS_RDONLY, nullptr);
xmkdir("/system", 0755);
xmount("/system_root/system", "/system", nullptr, MS_BIND, nullptr);
// Android Q
if (is_lnk("/system_root/init"))
load_sepol = true;
// System-as-root with monolithic sepolicy
if (access("/system_root/sepolicy", F_OK) == 0)
cp_afc("/system_root/sepolicy", "/sepolicy");
// Copy if these partitions are symlinks
link_root("/vendor");
link_root("/product");
link_root("/odm");
} else {
mount_root(system);
}
mount_root(system);
mount_root(vendor);
mount_root(product);
mount_root(odm);
}
void SARInit::early_mount() {
char partname[32];
char fstype[32];
char block_dev[64];
LOGD("Early mount system_root\n");
sprintf(partname, "system%s", cmd->slot);
setup_block(partname, block_dev);
xmkdir("/system_root", 0755);
if (xmount(block_dev, "/system_root", "ext4", MS_RDONLY, nullptr))
xmount(block_dev, "/system_root", "erofs", MS_RDONLY, nullptr);
xmkdir("/system", 0755);
xmount("/system_root/system", "/system", nullptr, MS_BIND, nullptr);
// Android Q
if (is_lnk("/system_root/init"))
load_sepol = true;
// System-as-root with monolithic sepolicy
if (access("/system_root/sepolicy", F_OK) == 0)
cp_afc("/system_root/sepolicy", "/sepolicy");
link_root("/vendor");
link_root("/product");
link_root("/odm");
mount_root(vendor);
mount_root(product);
mount_root(odm);
}
#define umount_root(name) \
if (mnt_##name) \
umount("/" #name);
void BaseInit::cleanup() {
umount(SELINUX_MNT);
umount("/sys");
umount("/proc");
umount_root(system);
umount_root(vendor);
umount_root(product);
umount_root(odm);
}