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 14:28:25
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：perf_event_fd_array_release

函数原型：static void perf_event_fd_array_release(struct bpf_map *map, struct file *map_file)

返回类型：void

参数：

类型参数名称
struct bpf_map *map
struct file *map_file
944  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)
948  _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
949  以i小于max_entries循环
950  ee等于READ_ONCE(ptrs[i])
951  如果ee且map_file恒等于map_file则fd_array_map_delete_elem(map, & i)
954  _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()