函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace.c Create Date:2022-07-27 13:09:50
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：rb_simple_read

函数原型：static ssize_t rb_simple_read(struct file *filp, 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
char __user *ubuf
size_tcnt
loff_t *ppos
8262  tr等于 needed for tty driver, and maybe others
8266  r等于racer_tracing_is_on - show real state of ring buffer enabled*@tr : the trace array to know if ring buffer is enabled* Shows real state of the ring buffer if it is enabled or not.
8267  r等于输出格式化串
8269  返回:simple_read_from_buffer(ubuf, cnt, ppos, buf, r)