Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\cgroup.c Create Date:2022-07-28 13:28:11
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:__cgroup_bpf_prog_array_is_empty

Proto:static bool __cgroup_bpf_prog_array_is_empty(struct cgroup *cgrp, enum bpf_attach_type attach_type)

Type:bool

Parameter:

TypeParameterName
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 = fetch RCU-protected pointer for dereferencing( array of effective progs in this cgroup [attach_type])
958  empty = 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  Return empty
Caller
NameDescribe
__cgroup_bpf_run_filter_setsockopt
__cgroup_bpf_run_filter_getsockopt