函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\cgroup\cgroup.c Create Date:2022-07-27 12:09:14
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：group_css - obtain a cgroup's css for the specified subsystem*@cgrp: the cgroup of interest*@ss: the subsystem of interest (%NULL returns @cgrp->self)* Return @cgrp's css (cgroup_subsys_state) associated with @ss

函数原型：static struct cgroup_subsys_state *cgroup_css(struct cgroup *cgrp, struct cgroup_subsys *ss)

返回类型：struct cgroup_subsys_state

参数：

类型参数名称
struct cgroup *cgrp
struct cgroup_subsys *ss
469  如果ss则返回:cu_dereference_check() - rcu_dereference with debug checking*@p: The pointer to read, prior to dereferencing*@c: The conditions under which the dereference will take place* Do an rcu_dereference(), but check that the conditions under which the( Private pointers for each registered subsystem [ the following two fields are initialized automtically during boot ], lockdep_is_held( & cgroup_mutex is the master lock))
472  否则返回: self css with NULL ->ss, points back to this cgroup
调用者
名称描述
cgroup_tryget_cssgroup_tryget_css - try to get a cgroup's css for the specified subsystem*@cgrp: the cgroup of interest*@ss: the subsystem of interest* Find and get @cgrp's css assocaited with @ss. If the css doesn't exist* or is offline, %NULL is returned.
cgroup_e_css_by_maskgroup_e_css_by_mask - obtain a cgroup's effective css for the specified ss*@cgrp: the cgroup of interest*@ss: the subsystem of interest (%NULL returns @cgrp->self)* Similar to cgroup_css() but returns the effective css, which is defined* as the matching
cgroup_e_cssgroup_e_css - obtain a cgroup's effective css for the specified subsystem*@cgrp: the cgroup of interest*@ss: the subsystem of interest* Find and get the effective css of @cgrp for @ss
cgroup_get_e_cssgroup_get_e_css - get a cgroup's effective css for the specified subsystem*@cgrp: the cgroup of interest*@ss: the subsystem of interest* Find and get the effective css of @cgrp for @ss
cgroup_rm_file
rebind_subsystems
cgroup_lock_and_drain_offlinegroup_lock_and_drain_offline - lock cgroup_mutex and drain offlined csses*@cgrp: root of the target subtree* Because css offlining is asynchronous, userland may try to re-enable a* controller while the previous css is still around. This function grabs
cgroup_apply_control_enablegroup_apply_control_enable - enable or show csses according to control*@cgrp: root of the target subtree* Walk @cgrp's subtree and create new csses or make the existing ones* visible. A css is created invisible if it's being implicitly enabled
cgroup_apply_control_disablegroup_apply_control_disable - kill or hide csses according to control*@cgrp: root of the target subtree* Walk @cgrp's subtree and kill and hide csses so that they match* cgroup_ss_mask() and cgroup_visible_mask()
cgroup_enable_threadedgroup_enable_threaded - make @cgrp threaded*@cgrp: the target cgroup* Called when "threaded" is written to the cgroup.type interface file and* tries to make @cgrp threaded and join the parent's resource domain.
cgroup_file_write
cgroup_apply_cftypes
init_and_link_css
css_create
cgroup_init_subsys
css_tryget_online_from_dirss_tryget_online_from_dir - get corresponding css from a cgroup dentry*@dentry: directory dentry of interest*@ss: subsystem of interest* If @dentry is a directory for a cgroup which has @ss enabled on it, try* to get the corresponding css and return it