Mirrors/Magisk
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Mount with original option

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Fix #5481, close #5486
This commit is contained in:
topjohnwu
2022-03-01 20:09:59 -08:00
parent 39e714c6d8
commit 548d70f30c
3 changed files with 44 additions and 23 deletions
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46
native/jni/core/bootstages.cpp
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@ -29,21 +29,31 @@ bool zygisk_enabled = false;
#define SETMIR(b, part) snprintf(b, sizeof(b), "%s/" MIRRDIR "/" #part, MAGISKTMP.data())
#define SETBLK(b, part) snprintf(b, sizeof(b), "%s/" BLOCKDIR "/" #part, MAGISKTMP.data())
#define do_mount_mirror(part, flag) {\
SETMIR(buf1, part); \
SETBLK(buf2, part); \
unlink(buf2); \
#define do_mount_mirror(part) { \
SETMIR(buf1, part); \
SETBLK(buf2, part); \
unlink(buf2); \
mknod(buf2, S_IFBLK | 0600, st.st_dev); \
xmkdir(buf1, 0755); \
xmount(buf2, buf1, me->mnt_type, flag, nullptr); \
LOGI("mount: %s\n", buf1); \
xmkdir(buf1, 0755); \
int flags = 0; \
auto opts = split_ro(me->mnt_opts, ",");\
for (string_view s : opts) { \
if (s == "ro") { \
flags |= MS_RDONLY; \
break; \
} \
} \
xmount(buf2, buf1, me->mnt_type, flags, nullptr); \
LOGI("mount: %s\n", buf1); \
}
#define mount_mirror(part, flag) \
if (MNT_DIR_IS("/" #part) && !MNT_TYPE_IS("tmpfs") && !MNT_TYPE_IS("overlay") && \
lstat(me->mnt_dir, &st) == 0) { \
do_mount_mirror(part, flag); \
break; \
#define mount_mirror(part) \
if (MNT_DIR_IS("/" #part) \
&& !MNT_TYPE_IS("tmpfs") \
&& !MNT_TYPE_IS("overlay") \
&& lstat(me->mnt_dir, &st) == 0) { \
do_mount_mirror(part); \
break; \
}
#define link_mirror(part) \
@ -73,11 +83,11 @@ static void mount_mirrors() {
parse_mnt("/proc/mounts", [&](mntent *me) {
struct stat st{};
do {
mount_mirror(system, MS_RDONLY)
mount_mirror(vendor, MS_RDONLY)
mount_mirror(product, MS_RDONLY)
mount_mirror(system_ext, MS_RDONLY)
mount_mirror(data, 0)
mount_mirror(system)
mount_mirror(vendor)
mount_mirror(product)
mount_mirror(system_ext)
mount_mirror(data)
link_orig(cache)
link_orig(metadata)
link_orig(persist)
@ -96,7 +106,7 @@ static void mount_mirrors() {
parse_mnt("/proc/mounts", [&](mntent *me) {
struct stat st;
if (MNT_DIR_IS("/") && me->mnt_type != "rootfs"sv && stat("/", &st) == 0) {
do_mount_mirror(system_root, MS_RDONLY)
do_mount_mirror(system_root)
return false;
}
return true;