ksud: make tmpfs and magic mount optional

- Create /data/adb/ksu/{.notmpfs,.nomount} to disable them.

Thanks to 5ec1cff!

kernel: Add MKSU support and simplify Makefile output

Thanks @5ec1cff.

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

kernel: remove unused Makefile in selinux folder

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

feat: KernelSU v1.0.2-45-legacy (#3)

* kernel: put get_cred_rcu() function inside core_hook.c so backporting is not neccessary

Just make things simple.

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

* kernel: refine path_umount detection

Keep the kernel driver clean.

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

* kernel: Refine kernelsu cmdline

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

* kernel: throne_tracker: Only print if its valid kernelsu manager

This can cause debugging process harder.

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

* kernel: throne_tracker: Ensure to log this on debug

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

---------

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

kernel: Fix atomic_long_t detection

Thanks to @ShevT for reporting this issue
https://github.com/rsuntk/KernelSU/pull/3#issuecomment-2599576575

I forgot that 'atomic_long_inc_not_zero' does not exist on cred.h, thus grep command always return '1' instead of '0'

Hopefully this will fix that issue.

Reference:
https://github.com/gregkh/linux/commit/123e44b9a49a42ff5313ec65256f1540d7c52fa0

kernel: Do not depend on OVERLAY_FS

We are using 5ec1cff's Magic Mount now!

Overlayfs have some compatibility issue in a few device, so using this feature "maybe" unnecessary.

And i'll try to improve Magic Mount API.

kernel: Allow KPROBES hooks optional on GKI

Some apps will detect that KernelSU uses kprobes and think that the device
environment is abnormal. Therefore, to avoid being detected, it is best to
follow the official documentation of KernelSU to manually hook, just like
doing it on a traditional kernel.

This commit allows us to manually hook while keeping CONFIG_KPROBES enabled.

Notes:
The kernel having kprobes support does not mean that the environment is
abnormal, because GKI has kprobes support by default, and disabling kprobes
support will make it impossible to start the device.

Co-authored-by: Pzqqt <821026875@qq.com>
Signed-off-by: rsuntk <rissu.ntk@gmail.com>

ksud: Address warning: elided lifetime has a name

warning: elided lifetime has a name
   --> src/sepolicy.rs:170:41
    |
169 | impl<'a> SeObjectParser<'a> for NormalPerm<'a> {
    |      -- lifetime 'a declared here
170 |     fn parse(input: &'a str) -> IResult<&str, Self> {
    |                                         ^ this elided lifetime gets resolved as 'a
    |
    = note: #[warn(elided_named_lifetimes)] on by default

warning: ksud (bin "ksud") generated 1 warning
    Finished release profile [optimized] target(s) in 46.61s

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

kernel: bring back get_ksu_state()

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

Don't unshare after entering global namespace (#2373)

Global namespace is usually used to publicly apply mounts so calling
unshare after entering root namespace is not desired bahavior. This also
keeps -M option same as Magisk.

ksud: Fix warning unused import (#2382)

docs: Refine docs

ksud: Update busybox

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

kernel: throne_tracker: Fix missing quotes

How i can forgot these?