65 lines
2.7 KiB
C
65 lines
2.7 KiB
C
#include <linux/hrtimer.h>
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#include <linux/workqueue.h>
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#define MAX_TIMER_NUM (128) // max timer number
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#define TIMER_MAX_WATCH_NUM (32) // A timer max watch number at once time
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#define MAX_NAME_LEN (127) // max name length
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typedef struct {
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pid_t task_id; // current process id
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char name[MAX_NAME_LEN + 1]; // name
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void *ptr; // virtual address
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int length_byte; // byte
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long long threshold; // threshold value
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unsigned char is_unsigned; // unsigned flag (true: unsigned, false: signed)
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unsigned char above_threshold; // reverse flag (true: >, false: <)
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unsigned long time_ns; // timer interval (ns)
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} watch_arg;
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typedef struct {
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pid_t task_id; // current process id
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char name[MAX_NAME_LEN + 2]; // name, last char automatically add '\0'
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void *ptr; // user space virtual address
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void *kptr; // kernel address + offset
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int length_byte; // byte
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long long threshold; // threshold value
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unsigned char is_unsigned; // unsigned flag (true: unsigned, false: signed)
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unsigned char above_threshold; // reverse flag (true: >, false: <)
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} kernel_watch_arg;
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typedef struct {
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unsigned long long time_ns; // hrTimer time interval (ns)
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struct hrtimer hr_timer; // hrTimer
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ktime_t kt; // hrTimer time
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unsigned sentinel; // sentinel
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kernel_watch_arg
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k_watch_args[TIMER_MAX_WATCH_NUM]; // all watched kernel_watch_arg
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int threshold_num; // all over threshold number,
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// 0 means no handle needed
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int threshold_buffer[TIMER_MAX_WATCH_NUM]; //
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struct work_struct wk; // for handle
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} kernel_watch_timer;
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// Global variable
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extern kernel_watch_timer
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kernel_wtimer_list[MAX_TIMER_NUM]; // all kernel_watch_timer
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extern volatile int kernel_wtimer_num; // current kernel_watch_timer number
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// EXPORT_SYMBOL(kernel_wtimer_list); // export kernel_watch_timer_list
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// EXPORT_SYMBOL(kernel_wtimer_num); // export kernel_watch_timer_num
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unsigned char del_all_kwarg_by_pid(pid_t pid);
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#define TIMER_START(timer) \
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(hrtimer_start(&timer->hr_timer, timer->kt, HRTIMER_MODE_REL))
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#define TIMER_CANCEL(timer) (hrtimer_cancel(&timer->hr_timer))
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// for timer
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kernel_watch_timer *get_timer(unsigned long long time_ns);
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unsigned char timer_add_watch(kernel_watch_timer *timer,
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kernel_watch_arg k_watch_arg);
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unsigned char timer_del_watch_by_pid(kernel_watch_timer *timer, pid_t pid);
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extern enum hrtimer_restart check_variable_cb(struct hrtimer *timer); // callback
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void start_all_hrTimer(void);
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void cancel_all_hrTimer(void); |