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 14:26:32
Last Modify:2022-05-23 09:15:29 Copyright©Brick
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函数名称：bpf_percpu_hash_update

函数原型：int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, u64 map_flags)

返回类型：int

参数：

类型参数名称
struct bpf_map *map
void *key
void *value
u64map_flags
1318  htab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_htab, map)
1321  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
1322  如果htab_is_lru(htab)则ret等于__htab_lru_percpu_map_update_elem(map, key, value, map_flags, true)
1325  否则ret等于__htab_percpu_map_update_elem(map, key, value, map_flags, true)
1328  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
1330  返回:ret
调用者
名称描述
map_update_elem