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Deprecated AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT, the leftover add_sus_mount cli and umount_for_zygote_system_process

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Reason:
 - AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT is also causing a bit more performance overheads and still it cannot catch all the sus mounts in all situations. Actually it can easily be done in boot-completed.sh, and it should be more accurate, see module templates for more details.

- Official KernelSU also allows ksud to add custom path to try_umount list as well, users can use their own way to add only the desired sus mounts to try_umount list, but remember to disable susfs ADD_TRY_UMOUNT in kernel if users want to use the official one.

- There are less use cases for umount_for_zygote_system_process, and sometimes enabling this may cause bootloop with some modules enabled, instead user can use busybox nsenter to umount the sus mounts for specific process later by themmselves.

Co-authored-by: simonpunk <simonpunk2016@gmail.com>
This commit is contained in:
ShirkNeko
2025-11-22 22:17:45 +08:00
parent 05758a975b
commit 455b725248
4 changed files with 13 additions and 79 deletions
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35
kernel/supercalls.c
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@@ -12,6 +12,11 @@
#include <linux/uaccess.h>
#include <linux/version.h>
#ifdef CONFIG_KSU_SUSFS
#include <linux/namei.h>
#include <linux/susfs.h>
#endif // #ifdef CONFIG_KSU_SUSFS
#include "supercalls.h"
#include "arch.h"
#include "allowlist.h"
@@ -36,33 +41,7 @@
#endif
#ifdef CONFIG_KSU_SUSFS
#include <linux/namei.h>
#include <linux/susfs.h>
bool susfs_is_boot_completed_triggered = false;
extern bool susfs_is_umount_for_zygote_system_process_enabled;
#ifdef CONFIG_KSU_SUSFS_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT
extern bool susfs_is_auto_add_try_umount_for_bind_mount_enabled;
#endif // #ifdef CONFIG_KSU_SUSFS_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT
static void susfs_on_post_fs_data(void) {
struct path path;
#ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
if (!kern_path(DATA_ADB_UMOUNT_FOR_ZYGOTE_SYSTEM_PROCESS, 0, &path)) {
susfs_is_umount_for_zygote_system_process_enabled = true;
path_put(&path);
}
pr_info("susfs_is_umount_for_zygote_system_process_enabled: %d\n", susfs_is_umount_for_zygote_system_process_enabled);
#endif // #ifdef CONFIG_KSU_SUSFS_SUS_MOUNT
#ifdef CONFIG_KSU_SUSFS_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT
if (!kern_path(DATA_ADB_NO_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT, 0, &path)) {
susfs_is_auto_add_try_umount_for_bind_mount_enabled = false;
path_put(&path);
}
pr_info("susfs_is_auto_add_try_umount_for_bind_mount_enabled: %d\n", susfs_is_auto_add_try_umount_for_bind_mount_enabled);
#endif // #ifdef CONFIG_KSU_SUSFS_AUTO_ADD_TRY_UMOUNT_FOR_BIND_MOUNT
}
#endif // #ifdef CONFIG_KSU_SUSFS
bool ksu_uid_scanner_enabled = false;
@@ -154,10 +133,6 @@ static int do_report_event(void __user *arg)
if (!post_fs_data_lock) {
post_fs_data_lock = true;
pr_info("post-fs-data triggered\n");
#ifdef CONFIG_KSU_SUSFS
susfs_on_post_fs_data();
pr_info("susfs_on_post_fs_data triggered\n");
#endif
on_post_fs_data();
init_uid_scanner();
#if __SULOG_GATE