函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\cgroup.c Create Date:2022-07-27 14:46:41
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：__cgroup_bpf_prog_array_is_empty

函数原型：static bool __cgroup_bpf_prog_array_is_empty(struct cgroup *cgrp, enum bpf_attach_type attach_type)

返回类型：bool

参数：

类型参数名称
struct cgroup *cgrp
enum bpf_attach_typeattach_type
956  _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
957  prog_array等于cu_dereference() - fetch RCU-protected pointer for dereferencing*@p: The pointer to read, prior to dereferencing* This is a simple wrapper around rcu_dereference_check().( array of effective progs in this cgroup [attach_type])
958  empty等于bpf_prog_array_is_empty(prog_array)
959  _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()
961  返回:empty
调用者
名称描述
__cgroup_bpf_run_filter_setsockopt
__cgroup_bpf_run_filter_getsockopt