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 14:26:24
Last Modify:2022-05-23 09:15:29 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 htab_map_free(struct bpf_map *map)

返回类型：void

参数：

类型参数名称
struct bpf_map *map
1191  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)
1198  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
1203  rcu_barrier()
1204  如果非htab_is_prealloc(htab)则delete_all_elements(htab)
1206  否则prealloc_destroy(htab)
1209  释放内存
1210  bpf_map_area_free(buckets)
1211  kfree(htab)
调用者
名称描述
fd_htab_map_free