函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:lib\iov_iter.c Create Date:2022-07-27 07:18:11
Last Modify:2022-05-21 11:43:54 Copyright©Brick
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函数名称:data_start

函数原型:static inline void data_start(const struct iov_iter *i, unsigned int *iter_headp, size_t *offp)

返回类型:void

参数:

类型参数名称
const struct iov_iter *i
unsigned int *iter_headp
size_t *offp
490  p_mask等于ring_size减1
491  iter_head等于head
492  off等于iov_offset
494  如果off且非allocated( & bufs[iter_head & p_mask])或off恒等于PAGE_SIZE的值则
496  iter_head自加
497  off等于0
499  iter_headp等于iter_head
500  offp等于off
调用者
名称描述
push_pipe
pipe_get_pages
pipe_get_pages_alloc
iov_iter_npages