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authorNeil Horman <nhorman@tuxdriver.com>2011-11-22 06:10:51 +0100
committerDavid S. Miller <davem@davemloft.net>2011-11-22 21:22:23 +0100
commit5bc1421e34ecfe0bd4b26dc3232b7d5e25179144 (patch)
tree783ed95187915c06757a260b637308919b35d5a0 /include/net/netprio_cgroup.h
parenttg3: Fix advertisement handling (diff)
downloadlinux-5bc1421e34ecfe0bd4b26dc3232b7d5e25179144.tar.xz
linux-5bc1421e34ecfe0bd4b26dc3232b7d5e25179144.zip
net: add network priority cgroup infrastructure (v4)
This patch adds in the infrastructure code to create the network priority cgroup. The cgroup, in addition to the standard processes file creates two control files: 1) prioidx - This is a read-only file that exports the index of this cgroup. This is a value that is both arbitrary and unique to a cgroup in this subsystem, and is used to index the per-device priority map 2) priomap - This is a writeable file. On read it reports a table of 2-tuples <name:priority> where name is the name of a network interface and priority is indicates the priority assigned to frames egresessing on the named interface and originating from a pid in this cgroup This cgroup allows for skb priority to be set prior to a root qdisc getting selected. This is benenficial for DCB enabled systems, in that it allows for any application to use dcb configured priorities so without application modification Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> CC: Robert Love <robert.w.love@intel.com> CC: "David S. Miller" <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/netprio_cgroup.h')
-rw-r--r--include/net/netprio_cgroup.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/include/net/netprio_cgroup.h b/include/net/netprio_cgroup.h
new file mode 100644
index 000000000000..c432e99942af
--- /dev/null
+++ b/include/net/netprio_cgroup.h
@@ -0,0 +1,65 @@
+/*
+ * netprio_cgroup.h Control Group Priority set
+ *
+ *
+ * Authors: Neil Horman <nhorman@tuxdriver.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#ifndef _NETPRIO_CGROUP_H
+#define _NETPRIO_CGROUP_H
+#include <linux/module.h>
+#include <linux/cgroup.h>
+#include <linux/hardirq.h>
+#include <linux/rcupdate.h>
+
+struct cgroup_netprio_state
+{
+ struct cgroup_subsys_state css;
+ u32 prioidx;
+};
+
+struct netprio_map {
+ struct rcu_head rcu;
+ u32 priomap_len;
+ u32 priomap[];
+};
+
+#ifdef CONFIG_CGROUPS
+
+#ifndef CONFIG_NETPRIO_CGROUP
+extern int net_prio_subsys_id;
+#endif
+
+extern void sock_update_netprioidx(struct sock *sk);
+
+static inline struct cgroup_netprio_state
+ *task_netprio_state(struct task_struct *p)
+{
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
+ return container_of(task_subsys_state(p, net_prio_subsys_id),
+ struct cgroup_netprio_state, css);
+#else
+ return NULL;
+#endif
+}
+
+#else
+
+#define sock_update_netprioidx(sk)
+#define skb_update_prio(skb)
+
+static inline struct cgroup_netprio_state
+ *task_netprio_state(struct task_struct *p)
+{
+ return NULL;
+}
+
+#endif
+
+#endif /* _NET_CLS_CGROUP_H */