420 lines
12 KiB
C
420 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/**
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* Copyright (c) 2024-2025 CALCULET Technologies Ltd. All rights reserved.
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*/
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#include "utils.h"
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/random.h>
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// 全局日志级别控制（可通过模块参数调整）
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#ifndef CALCULET_LOG_LEVEL
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#define CALCULET_LOG_LEVEL CALCULET_LOG_INFO
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#endif
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int calculet_log_level = CALCULET_LOG_LEVEL;
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// 模块参数，允许运行时调整日志级别
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module_param(calculet_log_level, int, 0644);
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MODULE_PARM_DESC(calculet_log_level, "Debug level (0=EMERG, 1=ALERT, 2=CRIT, 3=ERR, 4=WARN, 5=NOTICE, 6=INFO, 7=DEBUG)");
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// 全局统计信息
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static struct calculet_stats_counter g_global_stats;
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static bool g_stats_initialized = false;
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static DEFINE_SPINLOCK(g_stats_lock);
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/**
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* 初始化全局统计
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*/
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void calculet_global_stats_init(void)
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{
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spin_lock(&g_stats_lock);
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if (!g_stats_initialized) {
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calculet_stats_init(&g_global_stats);
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g_stats_initialized = true;
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calculet_log(CALCULET_LOG_DEBUG, "Global statistics initialized");
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}
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spin_unlock(&g_stats_lock);
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}
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/**
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* 更新全局统计
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*/
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void calculet_global_stats_update(s64 value)
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{
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if (g_stats_initialized) {
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calculet_stats_update(&g_global_stats, value);
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}
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}
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/**
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* 获取全局统计信息
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*/
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void calculet_global_stats_get(s64 *count, s64 *total, s64 *min, s64 *max, s64 *avg)
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{
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if (!g_stats_initialized) {
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if (count) *count = 0;
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if (total) *total = 0;
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if (min) *min = 0;
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if (max) *max = 0;
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if (avg) *avg = 0;
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return;
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}
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if (count) *count = atomic64_read(&g_global_stats.count);
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if (total) *total = atomic64_read(&g_global_stats.total);
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if (min) *min = atomic64_read(&g_global_stats.min);
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if (max) *max = atomic64_read(&g_global_stats.max);
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if (avg) *avg = calculet_stats_avg(&g_global_stats);
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}
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/**
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* 清理全局统计
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*/
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void calculet_global_stats_cleanup(void)
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{
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spin_lock(&g_stats_lock);
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g_stats_initialized = false;
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spin_unlock(&g_stats_lock);
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calculet_log(CALCULET_LOG_DEBUG, "Global statistics cleaned up");
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}
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/**
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* 内存分配跟踪器（仅在调试模式下）
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*/
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#ifdef CALCULET_DEBUG_MODE
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struct calculet_mem_info {
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void *ptr;
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size_t size;
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const char *file;
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int line;
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ktime_t alloc_time;
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struct list_head list;
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};
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static LIST_HEAD(g_mem_list);
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static DEFINE_SPINLOCK(g_mem_lock);
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static atomic_t g_mem_count = ATOMIC_INIT(0);
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static atomic64_t g_mem_total = ATOMIC64_INIT(0);
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void *calculet_kmalloc_tracked(size_t size, gfp_t flags, const char *file, int line)
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{
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struct calculet_mem_info *info;
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void *ptr;
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ptr = kmalloc(size, flags);
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if (!ptr) {
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return NULL;
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}
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info = kmalloc(sizeof(*info), GFP_ATOMIC);
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if (!info) {
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kfree(ptr);
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return NULL;
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}
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info->ptr = ptr;
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info->size = size;
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info->file = file;
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info->line = line;
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info->alloc_time = ktime_get();
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spin_lock(&g_mem_lock);
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list_add_tail(&info->list, &g_mem_list);
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spin_unlock(&g_mem_lock);
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atomic_inc(&g_mem_count);
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atomic64_add(size, &g_mem_total);
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calculet_log(CALCULET_LOG_DEBUG, "ALLOC %p (%zu bytes) at %s:%d, total=%d allocations, %lld bytes",
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ptr, size, file, line, atomic_read(&g_mem_count), atomic64_read(&g_mem_total));
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return ptr;
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}
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void calculet_kfree_tracked(void *ptr, const char *file, int line)
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{
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struct calculet_mem_info *info, *tmp;
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bool found = false;
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if (!ptr) {
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return;
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}
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spin_lock(&g_mem_lock);
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list_for_each_entry_safe(info, tmp, &g_mem_list, list) {
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if (info->ptr == ptr) {
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list_del(&info->list);
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found = true;
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break;
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}
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}
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spin_unlock(&g_mem_lock);
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if (found) {
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atomic_dec(&g_mem_count);
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atomic64_sub(info->size, &g_mem_total);
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calculet_log(CALCULET_LOG_DEBUG, "FREE %p (%zu bytes) at %s:%d, allocated at %s:%d, lifetime=%lld us",
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ptr, info->size, file, line, info->file, info->line,
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calculet_ktime_to_us(ktime_sub(ktime_get(), info->alloc_time)));
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kfree(info);
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} else {
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calculet_log(CALCULET_LOG_WARN, "FREE unknown pointer %p at %s:%d", ptr, file, line);
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}
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kfree(ptr);
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}
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void calculet_mem_dump_leaks(void)
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{
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struct calculet_mem_info *info;
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int leak_count = 0;
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calculet_log(CALCULET_LOG_DEBUG, "Memory leak check - %d allocations, %lld bytes total",
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atomic_read(&g_mem_count), atomic64_read(&g_mem_total));
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spin_lock(&g_mem_lock);
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list_for_each_entry(info, &g_mem_list, list) {
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calculet_log(CALCULET_LOG_WARN, "LEAK %p (%zu bytes) allocated at %s:%d, age=%lld us",
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info->ptr, info->size, info->file, info->line,
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calculet_ktime_to_us(ktime_sub(ktime_get(), info->alloc_time)));
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leak_count++;
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}
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spin_unlock(&g_mem_lock);
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if (leak_count == 0) {
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calculet_log(CALCULET_LOG_DEBUG, "No memory leaks detected");
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} else {
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calculet_log(CALCULET_LOG_ERROR, "%d memory leaks detected!", leak_count);
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}
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}
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void calculet_mem_cleanup_tracking(void)
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{
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struct calculet_mem_info *info, *tmp;
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spin_lock(&g_mem_lock);
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list_for_each_entry_safe(info, tmp, &g_mem_list, list) {
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list_del(&info->list);
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kfree(info);
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}
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spin_unlock(&g_mem_lock);
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atomic_set(&g_mem_count, 0);
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atomic64_set(&g_mem_total, 0);
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}
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#endif /* CALCULET_DEBUG_MODE */
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/**
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* 随机延迟函数（用于测试）
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*/
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void calculet_random_delay_us(unsigned int min_us, unsigned int max_us)
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{
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unsigned int delay_us;
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)
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delay_us = min_us + (get_random_u32() % (max_us - min_us + 1));
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#else
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delay_us = min_us + (get_random_int() % (max_us - min_us + 1));
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#endif
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calculet_udelay_range(delay_us, delay_us + 10);
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}
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/**
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* 字符串工具函数
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*/
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char *calculet_strdup(const char *s, gfp_t flags)
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{
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char *dup;
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size_t len;
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if (!s) {
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return NULL;
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}
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len = strlen(s) + 1;
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dup = kmalloc(len, flags);
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if (dup) {
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memcpy(dup, s, len);
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}
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return dup;
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}
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int calculet_snprintf_safe(char *buf, size_t size, const char *fmt, ...)
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{
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va_list args;
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int ret;
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if (!buf || size == 0) {
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return -EINVAL;
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}
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va_start(args, fmt);
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ret = vsnprintf(buf, size, fmt, args);
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va_end(args);
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// 确保字符串以null结尾
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buf[size - 1] = '\0';
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return ret;
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}
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/**
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* 位操作工具函数
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*/
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unsigned int calculet_ffs(unsigned long word)
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{
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return __ffs(word);
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}
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unsigned int calculet_fls(unsigned long word)
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{
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return fls(word);
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}
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unsigned int calculet_popcount(unsigned long word)
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{
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return hweight_long(word);
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}
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/**
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* 时间工具函数
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*/
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u64 calculet_get_cycles(void)
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{
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return get_cycles();
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}
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ktime_t calculet_get_monotonic_time(void)
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{
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return ktime_get();
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}
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ktime_t calculet_get_real_time(void)
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{
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return ktime_get_real();
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}
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/**
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* CRC32计算（简单版本）
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*/
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static const u32 crc32_table[256] = {
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0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
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0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
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0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
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0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
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0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
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0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
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0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
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0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
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0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
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0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
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0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
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0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
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0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
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0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
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0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
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0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
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0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
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0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
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0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
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0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
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0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
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0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
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0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
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0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
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0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
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0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
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0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
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0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
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0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
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0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
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0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
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0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
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0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
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0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
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0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
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0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
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0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
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0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
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0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
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0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
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0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
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0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
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0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
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};
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u32 calculet_crc32(u32 crc, const void *buf, size_t len)
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{
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const u8 *data = (const u8 *)buf;
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crc = ~crc;
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while (len--) {
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crc = crc32_table[(crc ^ *data++) & 0xff] ^ (crc >> 8);
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}
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return ~crc;
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}
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/**
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* 模块清理函数
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*/
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void calculet_utils_cleanup(void)
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{
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#ifdef CALCULET_DEBUG_MODE
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calculet_mem_dump_leaks();
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calculet_mem_cleanup_tracking();
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#endif
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calculet_global_stats_cleanup();
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}
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/**
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* 模块初始化函数
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*/
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int calculet_utils_init(void)
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{
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calculet_global_stats_init();
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calculet_log(CALCULET_LOG_DEBUG, "Utils module initialized (log_level=%d, debug_mode=%s)",
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calculet_log_level,
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#ifdef CALCULET_DEBUG_MODE
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"enabled"
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#else
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"disabled"
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#endif
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);
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return 0;
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}
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// 导出符号供其他模块使用
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EXPORT_SYMBOL(calculet_log_level);
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EXPORT_SYMBOL(calculet_global_stats_init);
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EXPORT_SYMBOL(calculet_global_stats_update);
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EXPORT_SYMBOL(calculet_global_stats_get);
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EXPORT_SYMBOL(calculet_global_stats_cleanup);
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#ifdef CALCULET_DEBUG_MODE
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EXPORT_SYMBOL(calculet_kmalloc_tracked);
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EXPORT_SYMBOL(calculet_kfree_tracked);
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EXPORT_SYMBOL(calculet_mem_dump_leaks);
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EXPORT_SYMBOL(calculet_mem_cleanup_tracking);
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#endif
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EXPORT_SYMBOL(calculet_random_delay_us);
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EXPORT_SYMBOL(calculet_strdup);
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EXPORT_SYMBOL(calculet_snprintf_safe);
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EXPORT_SYMBOL(calculet_ffs);
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EXPORT_SYMBOL(calculet_fls);
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EXPORT_SYMBOL(calculet_popcount);
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EXPORT_SYMBOL(calculet_get_cycles);
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EXPORT_SYMBOL(calculet_get_monotonic_time);
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EXPORT_SYMBOL(calculet_get_real_time);
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EXPORT_SYMBOL(calculet_crc32);
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EXPORT_SYMBOL(calculet_utils_init);
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EXPORT_SYMBOL(calculet_utils_cleanup); |