函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\hashtab.c Create Date:2022-07-27 14:26:27
Last Modify:2022-05-23 09:15:29 Copyright©Brick
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函数名称：Called from eBPF program

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

返回类型：void

参数：

类型参数名称
struct bpf_map *map
void *key
1263  l等于Called from syscall or from eBPF program directly, so* arguments have to match bpf_map_lookup_elem() exactly.* The return value is adjusted by BPF instructions* in htab_map_gen_lookup().
1265  如果l则返回:this_cpu_ptr(htab_elem_get_ptr(l, key_size))
1267  否则返回:NULL