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kernel: Use the prctl command to provide switches for scanning functionality in user space

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This commit is contained in:
ShirkNeko
2025-09-27 19:33:20 +08:00
parent 589c38530c
commit 37d5b9e046
5 changed files with 174 additions and 9 deletions
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79
kernel/throne_comm.c
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@@ -7,12 +7,18 @@
#include "klog.h"
#include "throne_comm.h"
#include "kernel_compat.h"
#define PROC_UID_SCANNER "ksu_uid_scanner"
#define UID_SCANNER_STATE_FILE "/data/adb/ksu/.uid_scanner"
static struct proc_dir_entry *proc_entry = NULL;
static struct workqueue_struct *scanner_wq = NULL;
static struct work_struct scan_work;
static struct work_struct ksu_state_save_work;
static struct work_struct ksu_state_load_work;
extern bool ksu_uid_scanner_enabled;
// Signal userspace to rescan
static bool need_rescan = false;
@@ -38,6 +44,67 @@ void ksu_handle_userspace_update(void)
pr_info("userspace uid list updated\n");
}
static void do_save_throne_state(struct work_struct *work)
{
struct file *fp;
char state_char = ksu_uid_scanner_enabled ? '1' : '0';
loff_t off = 0;
fp = ksu_filp_open_compat(UID_SCANNER_STATE_FILE, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (IS_ERR(fp)) {
pr_err("save_throne_state create file failed: %ld\n", PTR_ERR(fp));
return;
}
if (ksu_kernel_write_compat(fp, &state_char, sizeof(state_char), &off) != sizeof(state_char)) {
pr_err("save_throne_state write failed\n");
goto exit;
}
pr_info("throne state saved: %s\n", ksu_uid_scanner_enabled ? "enabled" : "disabled");
exit:
filp_close(fp, 0);
}
void do_load_throne_state(struct work_struct *work)
{
struct file *fp;
char state_char;
loff_t off = 0;
ssize_t ret;
fp = ksu_filp_open_compat(UID_SCANNER_STATE_FILE, O_RDONLY, 0);
if (IS_ERR(fp)) {
pr_info("throne state file not found, using default: disabled\n");
ksu_uid_scanner_enabled = false;
return;
}
ret = ksu_kernel_read_compat(fp, &state_char, sizeof(state_char), &off);
if (ret != sizeof(state_char)) {
pr_err("load_throne_state read err: %zd\n", ret);
ksu_uid_scanner_enabled = false;
goto exit;
}
ksu_uid_scanner_enabled = (state_char == '1');
pr_info("throne state loaded: %s\n", ksu_uid_scanner_enabled ? "enabled" : "disabled");
exit:
filp_close(fp, 0);
}
bool ksu_throne_comm_load_state(void)
{
return ksu_queue_work(&ksu_state_load_work);
}
void ksu_throne_comm_save_state(void)
{
ksu_queue_work(&ksu_state_save_work);
}
static int uid_scanner_show(struct seq_file *m, void *v)
{
if (need_rescan) {
@@ -134,3 +201,15 @@ void ksu_throne_comm_exit(void)
pr_info("throne communication cleaned up\n");
}
int ksu_uid_init(void)
{
INIT_WORK(&ksu_state_save_work, do_save_throne_state);
INIT_WORK(&ksu_state_load_work, do_load_throne_state);
return 0;
}
void ksu_uid_exit(void)
{
do_save_throne_state(NULL);
}