函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\ring_buffer.c Create Date:2022-07-27 12:58:12
Last Modify:2020-03-17 19:30:04 Copyright©Brick
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函数名称：Return the length of the given event. Will return* the length of the time extend if the event is a* time extend.

函数原型：static inline unsigned rb_event_length(struct ring_buffer_event *event)

返回类型：unsigned

参数：

类型参数名称
struct ring_buffer_event *event
181  当:type_len恒等于RINGBUF_TYPE_PADDING
182  如果rb_null_event(event)则返回:负1
185  返回:array[0]加RB_EVNT_HDR_SIZE
187  当:type_len恒等于RINGBUF_TYPE_TIME_EXTEND
188  返回:RB_LEN_TIME_EXTEND
190  当:type_len恒等于RINGBUF_TYPE_TIME_STAMP
191  返回:RB_LEN_TIME_STAMP
193  当:type_len恒等于define RINGBUF_TYPE_DATA for 'case RINGBUF_TYPE_DATA:'
194  返回:rb_event_data_length(event)
195  默认
196  BUG()
199  返回:0
调用者
名称描述
rb_event_ts_lengthReturn total length of time extend and data,* or just the event length for all other events.
ring_buffer_event_lengthg_buffer_event_length - return the length of the event*@event: the event to get the length of* Returns the size of the data load of a data event.* If the event is something other than a data event, it* returns the size of the event itself
rb_try_to_discard
rb_advance_reader
rb_advance_iter
ring_buffer_read_pageg_buffer_read_page - extract a page from the ring buffer*@buffer: buffer to extract from*@data_page: the page to use allocated from ring_buffer_alloc_read_page*@len: amount to extract*@cpu: the cpu of the buffer to extract