函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\eventpoll.c Create Date:2022-07-29 10:51:00
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：p_loop_check - Performs a check to verify that adding an epoll file (@file)* another epoll file (represented by @ep) does not create* closed loops or too deep chains.*@ep: Pointer to the epoll private data structure.

函数原型：static int ep_loop_check(struct eventpoll *ep, struct file *file)

返回类型：int

参数：

类型参数名称
struct eventpoll *ep
struct file *file
1994  ret等于p_call_nested - Perform a bound (possibly) nested call, by checking* that the recursion limit is not exceeded, and that* the same nested call (by the meaning of same cookie) is* no re-entered.
1999  used to optimize loop detection check 等于0
2000  删除链表项
2002  返回:ret
调用者
名称描述
SYSCALL_DEFINE4The following function implements the controller interface for* the eventpoll file that enables the insertion/removal/change of* file descriptors inside the interest set.