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Diffstat (limited to 'net/sched/cls_cgroup.c')
-rw-r--r--net/sched/cls_cgroup.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index 2ecde225ae60..709b0fb38a18 100644
--- a/net/sched/cls_cgroup.c
+++ b/net/sched/cls_cgroup.c
@@ -17,6 +17,7 @@
#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>
@@ -53,6 +54,28 @@ static void cgrp_destroy(struct cgroup *cgrp)
kfree(cgrp_cls_state(cgrp));
}
+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 *cgrp, struct cgroup_taskset *tset)
+{
+ struct task_struct *p;
+ void *v;
+
+ cgroup_taskset_for_each(p, cgrp, tset) {
+ task_lock(p);
+ v = (void *)(unsigned long)task_cls_classid(p);
+ iterate_fd(p->files, 0, update_classid, v);
+ task_unlock(p);
+ }
+}
+
static u64 read_classid(struct cgroup *cgrp, struct cftype *cft)
{
return cgrp_cls_state(cgrp)->classid;
@@ -77,6 +100,7 @@ struct cgroup_subsys net_cls_subsys = {
.name = "net_cls",
.create = cgrp_create,
.destroy = cgrp_destroy,
+ .attach = cgrp_attach,
.subsys_id = net_cls_subsys_id,
.base_cftypes = ss_files,
.module = THIS_MODULE,

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