函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\arraymap.c Create Date:2022-07-27 14:27:34
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Called when map->refcnt goes to zero, either from workqueue or from syscall

函数原型：static void array_map_free(struct bpf_map *map)

返回类型：void

参数：

类型参数名称
struct bpf_map *map
387  array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_array, map)
394  Wait for a grace period to elapse. But it is illegal to invoke* synchronize_rcu() from within an RCU read-side critical section.* Therefore, any legal call to synchronize_rcu() is a quiescent
396  如果map_type恒等于BPF_MAP_TYPE_PERCPU_ARRAY则bpf_array_free_percpu(array)
399  如果map_flags按位与Enable memory-mapping BPF map 则bpf_map_area_free(array_map_vmalloc_addr(array))
401  否则bpf_map_area_free(array)