函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace_events_inject.c Create Date:2022-07-27 13:35:55
Last Modify:2020-03-12 14:18:49 Copyright©Brick
首页 函数Tree
注解内核,赢得工具下载SCCTEnglish

函数名称：event_inject_write

函数原型：static ssize_t event_inject_write(struct file *filp, const char __user *ubuf, size_t cnt, loff_t *ppos)

返回类型：ssize_t

参数：

类型参数名称
struct file *filp
const char __user *ubuf
size_tcnt
loff_t *ppos
284  err等于负ENODEV
285  void * entry = NULL
288  如果cnt大于等于PAGE_SIZE则返回:负EINVAL
291  buf等于memdup_user_nul(ubuf, cnt)
292  如果是错误则返回:错误
294  删除前导和尾随空格
296  mutex_lock( & event_mutex)
297  file等于event_file_data(filp)
298  如果file则
299  call等于event_call
300  size等于Caller is responsible to free the *pentry.
301  如果size小于0则err等于size
303  否则err等于trace_inject_entry(file, entry, size)
306  mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.
308  kfree(entry)
309  kfree(buf)
311  如果err小于0则返回:err
314  ppos加等于err
315  返回:cnt