函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\libfs.c Create Date:2022-07-29 10:41:01
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：simple_transaction_read

函数原型：ssize_t simple_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)

返回类型：ssize_t

参数：

类型参数名称
struct file *file
char __user *buf
size_tsize
loff_t *pos
789  ar等于 needed for tty driver, and maybe others
791  如果非ar则返回:0
793  返回:simple_read_from_buffer - copy data from the buffer to user space*@to: the user space buffer to read to*@count: the maximum number of bytes to read*@ppos: the current position in the buffer*@from: the buffer to read from*@available: the size of the