diff options
| -rw-r--r-- | Documentation/cgroups/net_prio.txt | 2 | ||||
| -rw-r--r-- | net/core/netprio_cgroup.c | 42 |
2 files changed, 26 insertions, 18 deletions
diff --git a/Documentation/cgroups/net_prio.txt b/Documentation/cgroups/net_prio.txt index 01b3226..a82cbd2 100644 --- a/Documentation/cgroups/net_prio.txt +++ b/Documentation/cgroups/net_prio.txt @@ -51,3 +51,5 @@ One usage for the net_prio cgroup is with mqprio qdisc allowing application traffic to be steered to hardware/driver based traffic classes. These mappings can then be managed by administrators or other networking protocols such as DCBX. + +A new net_prio cgroup inherits the parent's configuration. diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c index b2af0d0..bde53da 100644 --- a/net/core/netprio_cgroup.c +++ b/net/core/netprio_cgroup.c @@ -136,9 +136,6 @@ static struct cgroup_subsys_state *cgrp_css_alloc(struct cgroup *cgrp) { struct cgroup_netprio_state *cs; - if (cgrp->parent && cgrp->parent->id) - return ERR_PTR(-EINVAL); - cs = kzalloc(sizeof(*cs), GFP_KERNEL); if (!cs) return ERR_PTR(-ENOMEM); @@ -146,16 +143,34 @@ static struct cgroup_subsys_state *cgrp_css_alloc(struct cgroup *cgrp) return &cs->css; } -static void cgrp_css_free(struct cgroup *cgrp) +static int cgrp_css_online(struct cgroup *cgrp) { - struct cgroup_netprio_state *cs = cgrp_netprio_state(cgrp); + struct cgroup *parent = cgrp->parent; struct net_device *dev; + int ret = 0; + + if (!parent) + return 0; rtnl_lock(); - for_each_netdev(&init_net, dev) - WARN_ON_ONCE(netprio_set_prio(cgrp, dev, 0)); + /* + * Inherit prios from the parent. As all prios are set during + * onlining, there is no need to clear them on offline. + */ + for_each_netdev(&init_net, dev) { + u32 prio = netprio_prio(parent, dev); + + ret = netprio_set_prio(cgrp, dev, prio); + if (ret) + break; + } rtnl_unlock(); - kfree(cs); + return ret; +} + +static void cgrp_css_free(struct cgroup *cgrp) +{ + kfree(cgrp_netprio_state(cgrp)); } static u64 read_prioidx(struct cgroup *cgrp, struct cftype *cft) @@ -237,21 +252,12 @@ static struct cftype ss_files[] = { struct cgroup_subsys net_prio_subsys = { .name = "net_prio", .css_alloc = cgrp_css_alloc, + .css_online = cgrp_css_online, .css_free = cgrp_css_free, .attach = net_prio_attach, .subsys_id = net_prio_subsys_id, .base_cftypes = ss_files, .module = THIS_MODULE, - - /* - * net_prio has artificial limit on the number of cgroups and - * disallows nesting making it impossible to co-mount it with other - * hierarchical subsystems. Remove the artificially low PRIOIDX_SZ - * limit and properly nest configuration such that children follow - * their parents' configurations by default and are allowed to - * override and remove the following. - */ - .broken_hierarchy = true, }; static int netprio_device_event(struct notifier_block *unused, |
