函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\devmap.c Create Date:2022-07-27 14:40:05
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：dev_map_delete_elem

函数原型：static int dev_map_delete_elem(struct bpf_map *map, void *key)

返回类型：int

参数：

类型参数名称
struct bpf_map *map
void *key
541  dtab等于container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(map, structbpf_dtab, map)
543  k等于key
545  如果k大于等于max_entries则返回:负EINVAL
556  old_dev等于xchg( & DEVMAP type only [k], NULL)
557  如果old_dev则all_rcu() - Queue an RCU callback for invocation after a grace period
559  返回:0