net: net_cls: move cgroupfs classid handling into core

[platform/adaptation/renesas_rcar/renesas_kernel.git] / net / sched / cls_cgroup.c

diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index 16006c9..838fa40 100644 (file)
--- a/net/sched/cls_cgroup.c
+++ b/net/sched/cls_cgroup.c
@@ -11,109 +11,13 @@
 
 #include <linux/module.h>
 #include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/errno.h>
 #include <linux/skbuff.h>
-#include <linux/cgroup.h>
 #include <linux/rcupdate.h>
-#include <linux/fdtable.h>
 #include <net/rtnetlink.h>
 #include <net/pkt_cls.h>
 #include <net/sock.h>
 #include <net/cls_cgroup.h>
 
-static inline struct cgroup_cls_state *css_cls_state(struct cgroup_subsys_state *css)
-{
-       return css ? container_of(css, struct cgroup_cls_state, css) : NULL;
-}
-
-static inline struct cgroup_cls_state *task_cls_state(struct task_struct *p)
-{
-       return css_cls_state(task_css(p, net_cls_subsys_id));
-}
-
-static struct cgroup_subsys_state *
-cgrp_css_alloc(struct cgroup_subsys_state *parent_css)
-{
-       struct cgroup_cls_state *cs;
-
-       cs = kzalloc(sizeof(*cs), GFP_KERNEL);
-       if (!cs)
-               return ERR_PTR(-ENOMEM);
-       return &cs->css;
-}
-
-static int cgrp_css_online(struct cgroup_subsys_state *css)
-{
-       struct cgroup_cls_state *cs = css_cls_state(css);
-       struct cgroup_cls_state *parent = css_cls_state(css_parent(css));
-
-       if (parent)
-               cs->classid = parent->classid;
-       return 0;
-}
-
-static void cgrp_css_free(struct cgroup_subsys_state *css)
-{
-       kfree(css_cls_state(css));
-}
-
-static int update_classid(const void *v, struct file *file, unsigned n)
-{
-       int err;
-       struct socket *sock = sock_from_file(file, &err);
-       if (sock)
-               sock->sk->sk_classid = (u32)(unsigned long)v;
-       return 0;
-}
-
-static void cgrp_attach(struct cgroup_subsys_state *css,
-                       struct cgroup_taskset *tset)
-{
-       struct task_struct *p;
-       struct cgroup_cls_state *cs = css_cls_state(css);
-       void *v = (void *)(unsigned long)cs->classid;
-
-       cgroup_taskset_for_each(p, css, tset) {
-               task_lock(p);
-               iterate_fd(p->files, 0, update_classid, v);
-               task_unlock(p);
-       }
-}
-
-static u64 read_classid(struct cgroup_subsys_state *css, struct cftype *cft)
-{
-       return css_cls_state(css)->classid;
-}
-
-static int write_classid(struct cgroup_subsys_state *css, struct cftype *cft,
-                        u64 value)
-{
-       css_cls_state(css)->classid = (u32) value;
-       return 0;
-}
-
-static struct cftype ss_files[] = {
-       {
-               .name = "classid",
-               .read_u64 = read_classid,
-               .write_u64 = write_classid,
-       },
-       { }     /* terminate */
-};
-
-struct cgroup_subsys net_cls_subsys = {
-       .name           = "net_cls",
-       .css_alloc      = cgrp_css_alloc,
-       .css_online     = cgrp_css_online,
-       .css_free       = cgrp_css_free,
-       .attach         = cgrp_attach,
-       .subsys_id      = net_cls_subsys_id,
-       .base_cftypes   = ss_files,
-       .module         = THIS_MODULE,
-};
-
 struct cls_cgroup_head {
        u32                     handle;
        struct tcf_exts         exts;
@@ -309,25 +213,12 @@ static struct tcf_proto_ops cls_cgroup_ops __read_mostly = {
 
 static int __init init_cgroup_cls(void)
 {
-       int ret;
-
-       ret = cgroup_load_subsys(&net_cls_subsys);
-       if (ret)
-               goto out;
-
-       ret = register_tcf_proto_ops(&cls_cgroup_ops);
-       if (ret)
-               cgroup_unload_subsys(&net_cls_subsys);
-
-out:
-       return ret;
+       return register_tcf_proto_ops(&cls_cgroup_ops);
 }
 
 static void __exit exit_cgroup_cls(void)
 {
        unregister_tcf_proto_ops(&cls_cgroup_ops);
-
-       cgroup_unload_subsys(&net_cls_subsys);
 }
 
 module_init(init_cgroup_cls);