函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\file.c Create Date:2022-07-29 10:38:43
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：__clear_close_on_exec

函数原型：static inline void __clear_close_on_exec(unsigned int fd, struct fdtable *fdt)

返回类型：void

参数：

类型参数名称
unsigned intfd
struct fdtable *fdt
235  如果st_bit - Determine whether a bit is set*@nr: bit number to test*@addr: Address to start counting from则__clear_bit - Clears a bit in memory*@nr: the bit to clear*@addr: the address to start counting from* Unlike clear_bit(), this function is non-atomic. If it is called on the same* region of memory concurrently, the effect may be that only one operation
调用者
名称描述
__alloc_fdallocate a file descriptor, mark it busy.
set_close_on_execWe only lock f_pos if we have threads or if the file might be* shared with another process. In both cases we'll have an elevated* file count (done either by fdget() or by fork()).
do_dup2