From 0ba18f7a5e268e095f79e32b7b47e8ce4fbabbe2 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 22 Nov 2012 07:32:46 -0800 Subject: netcls_cgroup: move config inheritance to ->css_online() and remove .broken_hierarchy marking It turns out that we'll have to live with attributes which are inherited at cgroup creation time but not affected by further updates to the parent afterwards - such attributes are already in wide use e.g. for cpuset. So, there's nothing to do for netcls_cgroup for hierarchy support. Its current behavior - inherit only during creation - is good enough. Move config inheriting from ->css_alloc() to ->css_online() for consistency, which doesn't change behavior at all, and remove .broken_hierarchy marking. Signed-off-by: Tejun Heo Tested-and-Acked-by: Daniel Wagner Acked-by: David S. Miller --- net/sched/cls_cgroup.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) (limited to 'net/sched/cls_cgroup.c') diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c index 8cdc18e075fb..31f06b633574 100644 --- a/net/sched/cls_cgroup.c +++ b/net/sched/cls_cgroup.c @@ -41,11 +41,15 @@ static struct cgroup_subsys_state *cgrp_css_alloc(struct cgroup *cgrp) cs = kzalloc(sizeof(*cs), GFP_KERNEL); if (!cs) return ERR_PTR(-ENOMEM); + return &cs->css; +} +static int cgrp_css_online(struct cgroup *cgrp) +{ if (cgrp->parent) - cs->classid = cgrp_cls_state(cgrp->parent)->classid; - - return &cs->css; + cgrp_cls_state(cgrp)->classid = + cgrp_cls_state(cgrp->parent)->classid; + return 0; } static void cgrp_css_free(struct cgroup *cgrp) @@ -76,19 +80,11 @@ static struct cftype ss_files[] = { struct cgroup_subsys net_cls_subsys = { .name = "net_cls", .css_alloc = cgrp_css_alloc, + .css_online = cgrp_css_online, .css_free = cgrp_css_free, .subsys_id = net_cls_subsys_id, .base_cftypes = ss_files, .module = THIS_MODULE, - - /* - * While net_cls cgroup has the rudimentary hierarchy support of - * inheriting the parent's classid on cgroup creation, it doesn't - * properly propagates config changes in ancestors to their - * descendents. A child should follow the parent's configuration - * but be allowed to override it. Fix it and remove the following. - */ - .broken_hierarchy = true, }; struct cls_cgroup_head { -- cgit v1.2.3