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kernel: count time of volumedown to enter safemode

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weishu
2023-02-13 22:01:55 +07:00
parent 55602f1f16
commit 051fc53a4f
1 changed files with 10 additions and 39 deletions
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49
kernel/ksud.c
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@@ -11,7 +11,6 @@
#include "linux/version.h" #include "linux/version.h"
#include "linux/workqueue.h" #include "linux/workqueue.h"
#include "linux/input.h" #include "linux/input.h"
#include "linux/time64.h"
#include "allowlist.h" #include "allowlist.h"
#include "arch.h" #include "arch.h"
@@ -192,13 +191,10 @@ int ksu_handle_vfs_read(struct file **file_ptr, char __user **buf_ptr,
return 0; return 0;
} }
static const time64_t UNINITIALIZED = -1; static unsigned int volumedown_pressed_count = 0;
static time64_t last_vol_down_pressed = UNINITIALIZED;
static time64_t last_vol_down_release = UNINITIALIZED;
static bool is_time_initialized(time64_t t) static bool is_volumedown_enough(unsigned int count) {
{ return count >= 3;
return t != UNINITIALIZED;
} }
int ksu_handle_input_handle_event(unsigned int *type, unsigned int *code, int ksu_handle_input_handle_event(unsigned int *type, unsigned int *code,
@@ -213,20 +209,12 @@ int ksu_handle_input_handle_event(unsigned int *type, unsigned int *code,
int val = *value; int val = *value;
pr_info("KEY_VOLUMEDOWN val: %d\n", val); pr_info("KEY_VOLUMEDOWN val: %d\n", val);
if (val) { if (val) {
// key pressed // key pressed, count it
last_vol_down_pressed = ktime_get_seconds(); volumedown_pressed_count += 1;
} else { if (is_volumedown_enough(volumedown_pressed_count)) {
// key released
if (is_time_initialized(last_vol_down_pressed)) {
last_vol_down_release = ktime_get_seconds();
// when released, stop hook
stop_input_hook(); stop_input_hook();
} else {
pr_info("KEY_VOLUMEDOWN released, but not pressed yet\n");
} }
} }
pr_info("last_vol_down_pressed: %ld, last_vol_down_release: %ld\n",
last_vol_down_pressed, last_vol_down_release);
} }
return 0; return 0;
@@ -243,27 +231,10 @@ bool ksu_is_safe_mode() {
// stop hook first! // stop hook first!
stop_input_hook(); stop_input_hook();
pr_info("ksu_is_safe_mode last_vol_down_pressed: %ld, last_vol_down_release: %ld\n", pr_info("volumedown_pressed_count: %d\n", volumedown_pressed_count);
last_vol_down_pressed, last_vol_down_release); if (is_volumedown_enough(volumedown_pressed_count)) {
if (!is_time_initialized(last_vol_down_pressed)) { // pressed over 3 times
// not pressed yet pr_info("KEY_VOLUMEDOWN pressed max times, safe mode detected!\n");
return false;
}
// vol down pressed
time64_t vol_down_time;
if (!is_time_initialized(last_vol_down_release)) {
// not released yet, use current time
vol_down_time = ktime_get_seconds();
} else {
vol_down_time = last_vol_down_release;
}
pr_info("ksu_is_safe_mode vol_down_time: %ld, last_vol_down_pressed: %ld\n",
vol_down_time, last_vol_down_pressed);
if (vol_down_time - last_vol_down_pressed >= 2) {
// pressed over 2 seconds
pr_info("KEY_VOLUMEDOWN pressed over 2 seconds, safe mode detected!\n");
safe_mode = true; safe_mode = true;
return true; return true;
} }