[PATCH 0/2] net: Add network priority cgroup

[PATCH 0/2] net: Add network priority cgroup

[Neil Horman]

Data Center Bridging environments are currently somewhat limited in their
ability to provide a general mechanism for controlling traffic priority.
Specifically they are unable to administratively control the priority at which
various types of network traffic are sent.
 
Currently, the primary ways to set the priority of a network buffer are:

1) Through the use of the SO_PRIORITY socket option
2) By using low level hooks, like a tc action, or iptables

(1) is difficult from an administrative perspective because it requires that the
application to be coded to not just assume the default priority is sufficient,
and must expose an administrative interface to allow priority adjustment.  Such
a solution is not scalable in a DCB environment

(2) is also difficult, as it requires constant administrative oversight of
applications so as to build appropriate rules to match traffic belonging to
various classes, so that priority can be appropriately set. It is further
limiting when DCB enabled hardware is in use, due to the fact that tc rules are
only run after a root qdisc has been selected (DCB enabled hardware may reserve
hw queues for various traffic classes and needs the priority to be set prior to
selecting the root qdisc)

I've discussed various solutions with John Fastabend, and we saw a cgroup as
being a good general solution to this problem.  The network priority cgroup
allows for a per-interface priority map to be built per cgroup.  Any traffic
originating from an application in a cgroup, that does not explicitly set its
priority with SO_PRIORITY will have its priority assigned to the value
designated for that group on that interface.  This allows a user space daemon,
when conducting LLDP negotiation with a DCB enabled peer to create a cgroup
based on the APP_TLV value received and administratively assign applications to
that priority using the existing cgroup utility infrastructure.

Tested by John and myself, with good results

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>

[PATCH 1/2] net: add network priority cgroup infrastructure

[Neil Horman]

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>
---
 include/linux/cgroup_subsys.h |    8 +
 include/linux/netdevice.h     |    4 +
 include/net/netprio_cgroup.h  |   66 ++++++++
 include/net/sock.h            |    3 +
 net/Kconfig                   |    7 +
 net/core/Makefile             |    1 +
 net/core/dev.c                |   13 ++
 net/core/netprio_cgroup.c     |  340 +++++++++++++++++++++++++++++++++++++++++
 net/core/sock.c               |   22 +++-
 net/socket.c                  |    2 +
 10 files changed, 465 insertions(+), 1 deletions(-)
 create mode 100644 include/net/netprio_cgroup.h
 create mode 100644 net/core/netprio_cgroup.c

diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h
index ac663c1..0bd390c 100644
--- a/include/linux/cgroup_subsys.h
+++ b/include/linux/cgroup_subsys.h
@@ -59,8 +59,16 @@ SUBSYS(net_cls)
 SUBSYS(blkio)
 #endif
 
+/* */
+
 #ifdef CONFIG_CGROUP_PERF
 SUBSYS(perf)
 #endif
 
 /* */
+
+#ifdef CONFIG_NETPRIO_CGROUP
+SUBSYS(net_prio)
+#endif
+
+/* */
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 0db1f5f..86e8c3f 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -50,6 +50,7 @@
 #ifdef CONFIG_DCB
 #include <net/dcbnl.h>
 #endif
+#include <net/netprio_cgroup.h>
 
 struct vlan_group;
 struct netpoll_info;
@@ -1312,6 +1313,9 @@ struct net_device {
 	/* max exchange id for FCoE LRO by ddp */
 	unsigned int		fcoe_ddp_xid;
 #endif
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
+	struct netprio_map *priomap;
+#endif
 	/* phy device may attach itself for hardware timestamping */
 	struct phy_device *phydev;
 
diff --git a/include/net/netprio_cgroup.h b/include/net/netprio_cgroup.h
new file mode 100644
index 0000000..6b65936
--- /dev/null
+++ b/include/net/netprio_cgroup.h
@@ -0,0 +1,66 @@
+/*
+ * 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);
+extern void skb_update_prio(struct sk_buff *skb);
+
+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 */
diff --git a/include/net/sock.h b/include/net/sock.h
index 5ac682f..87b24aa 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -321,6 +321,9 @@ struct sock {
 	unsigned short		sk_ack_backlog;
 	unsigned short		sk_max_ack_backlog;
 	__u32			sk_priority;
+#ifdef CONFIG_CGROUPS
+	__u32			sk_cgrp_prioidx;
+#endif
 	struct pid		*sk_peer_pid;
 	const struct cred	*sk_peer_cred;
 	long			sk_rcvtimeo;
diff --git a/net/Kconfig b/net/Kconfig
index a073148..63d2c5d 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -232,6 +232,13 @@ config XPS
 	depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
 	default y
 
+config NETPRIO_CGROUP
+	tristate "Network priority cgroup"
+	depends on CGROUPS
+	---help---
+	  Cgroup subsystem for use in assigning processes to network priorities on
+	  a per-interface basis
+
 config HAVE_BPF_JIT
 	bool
 
diff --git a/net/core/Makefile b/net/core/Makefile
index 0d357b1..3606d40 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -19,3 +19,4 @@ obj-$(CONFIG_FIB_RULES) += fib_rules.o
 obj-$(CONFIG_TRACEPOINTS) += net-traces.o
 obj-$(CONFIG_NET_DROP_MONITOR) += drop_monitor.o
 obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += timestamping.o
+obj-$(CONFIG_NETPRIO_CGROUP) += netprio_cgroup.o
diff --git a/net/core/dev.c b/net/core/dev.c
index b7ba81a..a1dca83 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2456,6 +2456,17 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
 	return rc;
 }
 
+#ifdef CONFIG_CGROUPS
+void skb_update_prio(struct sk_buff *skb)
+{
+	struct netprio_map *map = rcu_dereference(skb->dev->priomap);
+
+	if ((!skb->priority) && (skb->sk) && map)
+		skb->priority = map->priomap[skb->sk->sk_cgrp_prioidx];
+}
+EXPORT_SYMBOL_GPL(skb_update_prio);
+#endif
+
 static DEFINE_PER_CPU(int, xmit_recursion);
 #define RECURSION_LIMIT 10
 
@@ -2496,6 +2507,8 @@ int dev_queue_xmit(struct sk_buff *skb)
 	 */
 	rcu_read_lock_bh();
 
+	skb_update_prio(skb);
+
 	txq = dev_pick_tx(dev, skb);
 	q = rcu_dereference_bh(txq->qdisc);
 
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
new file mode 100644
index 0000000..14e896c
--- /dev/null
+++ b/net/core/netprio_cgroup.c
@@ -0,0 +1,340 @@
+/*
+ * net/sched/cls_cgroup.c	Control Group Classifier
+ *
+ *		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.
+ *
+ * Authors:	Thomas Graf <tgraf@suug.ch>
+ */
+
+#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/atomic.h>
+#include <net/rtnetlink.h>
+#include <net/pkt_cls.h>
+#include <net/sock.h>
+#include <net/netprio_cgroup.h>
+
+static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
+					       struct cgroup *cgrp);
+static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp);
+static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp);
+
+struct cgroup_subsys net_prio_subsys = {
+	.name		= "net_prio",
+	.create		= cgrp_create,
+	.destroy	= cgrp_destroy,
+	.populate	= cgrp_populate,
+#ifdef CONFIG_NETPRIO_CGROUP
+	.subsys_id	= net_prio_subsys_id,
+#endif
+	.module		= THIS_MODULE
+};
+
+#define PRIOIDX_SZ 128
+
+static unsigned long prioidx_map[PRIOIDX_SZ];
+static DEFINE_SPINLOCK(prioidx_map_lock);
+static atomic_t max_prioidx = ATOMIC_INIT(0);
+
+static inline struct cgroup_netprio_state *cgrp_netprio_state(struct cgroup *cgrp)
+{
+	return container_of(cgroup_subsys_state(cgrp, net_prio_subsys_id),
+			    struct cgroup_netprio_state, css);
+}
+
+static int get_prioidx(u32 *prio)
+{
+	unsigned long flags;
+	u32 prioidx;
+
+	spin_lock_irqsave(&prioidx_map_lock, flags);
+	prioidx = find_first_zero_bit(prioidx_map, sizeof(unsigned long) * PRIOIDX_SZ);
+	set_bit(prioidx, prioidx_map);
+	spin_unlock_irqrestore(&prioidx_map_lock, flags);
+	if (prioidx == sizeof(unsigned long) * PRIOIDX_SZ)
+		return -ENOSPC;
+
+	atomic_set(&max_prioidx, prioidx);
+	*prio = prioidx;
+	return 0;
+}
+
+static void put_prioidx(u32 idx)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&prioidx_map_lock, flags);
+	clear_bit(idx, prioidx_map);
+	spin_unlock_irqrestore(&prioidx_map_lock, flags);
+}
+
+static void extend_netdev_table(struct net_device *dev, u32 new_len)
+{
+	size_t new_size = sizeof(struct netprio_map) +
+			   ((sizeof(u32) * new_len));
+	struct netprio_map *new_priomap = kzalloc(new_size, GFP_KERNEL);
+	struct netprio_map *old_priomap;
+	int i;
+
+	old_priomap  = rcu_dereference_protected(dev->priomap, 1);
+
+
+	if (!new_priomap) {
+		printk(KERN_WARNING "Unable to alloc new priomap!\n");
+		return;
+	}
+
+	for (i = 0;
+	     dev->priomap && (i < dev->priomap->priomap_len);
+	     i++)
+		new_priomap->priomap[i] = dev->priomap->priomap[i];
+
+	new_priomap->priomap_len = new_len;
+
+	rcu_assign_pointer(dev->priomap, new_priomap);
+	if (old_priomap)
+		kfree_rcu(old_priomap, rcu);
+
+}
+
+static void update_netdev_tables(void)
+{
+	struct net_device *dev;
+	u32 max_len = atomic_read(&max_prioidx);
+
+	rtnl_lock();
+
+	for_each_netdev(&init_net, dev) {
+		if ((!dev->priomap) ||
+		    (dev->priomap->priomap_len < max_len))
+			extend_netdev_table(dev, max_len);
+	}
+
+	rtnl_unlock();
+}
+
+static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
+						 struct cgroup *cgrp)
+{
+	struct cgroup_netprio_state *cs;
+	int ret;
+
+	cs = kzalloc(sizeof(*cs), GFP_KERNEL);
+	if (!cs)
+		return ERR_PTR(-ENOMEM);
+
+	if (cgrp->parent && cgrp_netprio_state(cgrp->parent)->prioidx)
+		return ERR_PTR(-EINVAL);
+
+	ret = get_prioidx(&cs->prioidx);
+	if (ret != 0) {
+		printk(KERN_WARNING "No space in priority index array\n");
+		return ERR_PTR(ret);
+	}
+
+	return &cs->css;
+}
+
+static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+	struct cgroup_netprio_state *cs;
+	struct net_device *dev;
+
+	cs = cgrp_netprio_state(cgrp);
+	rtnl_lock();
+	for_each_netdev(&init_net, dev) {
+		if (dev->priomap)
+			dev->priomap->priomap[cs->prioidx] = 0;
+	}
+	rtnl_unlock();
+	put_prioidx(cs->prioidx);
+out_free:
+	kfree(cs);
+}
+
+static u64 read_prioidx(struct cgroup *cgrp, struct cftype *cft)
+{
+	return (u64)cgrp_netprio_state(cgrp)->prioidx;
+}
+
+static int read_priomap(struct cgroup *cont, struct cftype *cft,
+			struct cgroup_map_cb *cb)
+{
+	struct net_device *dev;
+	u32 prioidx = cgrp_netprio_state(cont)->prioidx;
+	u32 priority;
+
+	/*
+ 	 * Stub until I add the per-interface priority map
+ 	 */
+	rcu_read_lock();
+	for_each_netdev_rcu(&init_net, dev) {
+		priority = dev->priomap ? dev->priomap->priomap[prioidx] : 0;
+		cb->fill(cb, dev->name, priority);
+	}
+	rcu_read_unlock();
+	return 0;
+}
+
+static int write_priomap(struct cgroup *cgrp, struct cftype *cft,
+			 const char *buffer)
+{
+	char *devname = kstrdup(buffer, GFP_KERNEL);
+	int ret = -EINVAL;
+	u32 prioidx = cgrp_netprio_state(cgrp)->prioidx;
+	unsigned long priority;
+	char *priostr;
+	struct net_device *dev;
+
+	devname = kstrdup(buffer, GFP_KERNEL);
+	if (!devname)
+		return -ENOMEM;
+
+	/*
+	 * Minimally sized valid priomap string
+	 */
+	if (strlen(devname) < 3)
+		goto out_free_devname;
+
+	priostr = strstr(devname, " ");
+	if (!priostr)
+		goto out_free_devname;
+
+	/*
+	 *Separate the devname from the associated priority
+	 *and advance the priostr poitner to the priority value
+	 */
+	*priostr = '\0';
+	priostr++;
+
+	/*
+	 * If the priostr points to NULL, we're at the end of the passed
+	 * in string, and its not a valid write
+	 */
+	if (*priostr == '\0')
+		goto out_free_devname;
+
+	ret = kstrtoul(priostr, 10, &priority);
+	if (ret < 0)
+		goto out_free_devname;
+
+	ret = -ENODEV;
+
+	dev = dev_get_by_name(&init_net, devname);
+	if (!dev)
+		goto out_free_devname;
+
+	update_netdev_tables();
+	ret = 0;
+	if (dev->priomap)
+		dev->priomap->priomap[prioidx] = priority;
+
+	dev_put(dev);
+
+out_free_devname:
+	kfree(devname);
+	return ret;
+}
+
+static struct cftype ss_files[] = {
+	{
+		.name = "prioidx",
+		.read_u64 = read_prioidx,
+	},
+	{
+		.name = "ifpriomap",
+		.read_map = read_priomap,
+		.write_string = write_priomap,
+	},
+};
+
+static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+	return cgroup_add_files(cgrp, ss, ss_files, ARRAY_SIZE(ss_files));
+}
+
+static int netprio_device_event(struct notifier_block *unused,
+				unsigned long event, void *ptr)
+{
+	struct net_device *dev = ptr;
+	struct netprio_map *old;
+	u32 max_len = atomic_read(&max_prioidx);
+
+	old = rcu_dereference_protected(dev->priomap, 1);
+	/*
+	 * Note this is called with rtnl_lock held so we have update side
+	 * protection on our rcu assignments
+	 */
+
+	switch (event) {
+
+	case NETDEV_REGISTER:
+		if (max_len)
+			extend_netdev_table(dev, max_len);
+		break;
+	case NETDEV_UNREGISTER:
+		rcu_assign_pointer(dev->priomap, NULL);
+		if (old)
+			kfree_rcu(old, rcu);
+		break;
+	}
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block netprio_device_notifier = {
+	.notifier_call = netprio_device_event
+};
+
+static int __init init_cgroup_netprio(void)
+{
+	int ret;
+
+	ret = cgroup_load_subsys(&net_prio_subsys);
+	if (ret)
+		goto out;
+#ifndef CONFIG_NETPRIO_CGROUP
+	smp_wmb();
+	net_prio_subsys_id = net_prio_subsys.subsys_id;
+#endif
+
+	register_netdevice_notifier(&netprio_device_notifier);
+
+out:
+	return ret;
+}
+
+static void __exit exit_cgroup_netprio(void)
+{
+	struct netprio_map *old;
+	struct net_device *dev;
+
+	unregister_netdevice_notifier(&netprio_device_notifier);
+
+	cgroup_unload_subsys(&net_prio_subsys);
+
+#ifndef CONFIG_NETPRIO_CGROUP
+	net_prio_subsys_id = -1;
+	synchronize_rcu();
+#endif
+
+	rtnl_lock();
+	for_each_netdev(&init_net, dev) {
+		old = dev->priomap;
+		rcu_assign_pointer(dev->priomap, NULL);
+		if (old)
+			kfree_rcu(old, rcu);
+	}
+	rtnl_unlock();
+}
+
+module_init(init_cgroup_netprio);
+module_exit(exit_cgroup_netprio);
+MODULE_LICENSE("GPL v2");
diff --git a/net/core/sock.c b/net/core/sock.c
index 5a08762..77a4888 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -125,6 +125,7 @@
 #include <net/xfrm.h>
 #include <linux/ipsec.h>
 #include <net/cls_cgroup.h>
+#include <net/netprio_cgroup.h>
 
 #include <linux/filter.h>
 
@@ -221,10 +222,16 @@ __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
 int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512);
 EXPORT_SYMBOL(sysctl_optmem_max);
 
-#if defined(CONFIG_CGROUPS) && !defined(CONFIG_NET_CLS_CGROUP)
+#if defined(CONFIG_CGROUPS)
+#if !defined(CONFIG_NET_CLS_CGROUP)
 int net_cls_subsys_id = -1;
 EXPORT_SYMBOL_GPL(net_cls_subsys_id);
 #endif
+#if !defined(CONFIG_NETPRIO_CGROUP)
+int net_prio_subsys_id = -1;
+EXPORT_SYMBOL_GPL(net_prio_subsys_id);
+#endif
+#endif
 
 static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
 {
@@ -1111,6 +1118,18 @@ void sock_update_classid(struct sock *sk)
 		sk->sk_classid = classid;
 }
 EXPORT_SYMBOL(sock_update_classid);
+
+void sock_update_netprioidx(struct sock *sk)
+{
+	struct cgroup_netprio_state *state;
+	if (in_interrupt())
+		return;
+	rcu_read_lock();
+	state = task_netprio_state(current);
+	sk->sk_cgrp_prioidx = state ? state->prioidx : 0;
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(sock_update_netprioidx);
 #endif
 
 /**
@@ -1138,6 +1157,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
 		atomic_set(&sk->sk_wmem_alloc, 1);
 
 		sock_update_classid(sk);
+		sock_update_netprioidx(sk);
 	}
 
 	return sk;
diff --git a/net/socket.c b/net/socket.c
index 2877647..108716f 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -549,6 +549,8 @@ static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock,
 
 	sock_update_classid(sock->sk);
 
+	sock_update_netprioidx(sock->sk);
+
 	si->sock = sock;
 	si->scm = NULL;
 	si->msg = msg;
-- 
1.7.6.4

Re: [PATCH 1/2] net: add network priority cgroup infrastructure

[WANG Cong]

On Wed, 16 Nov 2011 15:51:05 -0500, Neil Horman wrote:
 
> +static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
> +{
> +	struct cgroup_netprio_state *cs;
> +	struct net_device *dev;
> +
> +	cs = cgrp_netprio_state(cgrp);
> +	rtnl_lock();
> +	for_each_netdev(&init_net, dev) {
> +		if (dev->priomap)
> +			dev->priomap->priomap[cs->prioidx] = 0; 
> +	}
> +	rtnl_unlock();
> +	put_prioidx(cs->prioidx);
> +out_free:
> +	kfree(cs);
> +}

'out_free' is unused.


> +
> +static int write_priomap(struct cgroup *cgrp, struct cftype *cft, 
> +			 const char *buffer)
> +{
> +	char *devname = kstrdup(buffer, GFP_KERNEL); 
> +	int ret = -EINVAL;
> +	u32 prioidx = cgrp_netprio_state(cgrp)->prioidx; 
> +	unsigned long priority;
> +	char *priostr;
> +	struct net_device *dev;
> +
> +	devname = kstrdup(buffer, GFP_KERNEL); 


kstrdup() is called twice...


Thanks.

Re: [PATCH 1/2] net: add network priority cgroup infrastructure

[John Fastabend]

On 11/16/2011 12:51 PM, Neil Horman wrote:
> 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>
> ---
>  include/linux/cgroup_subsys.h |    8 +
>  include/linux/netdevice.h     |    4 +
>  include/net/netprio_cgroup.h  |   66 ++++++++
>  include/net/sock.h            |    3 +
>  net/Kconfig                   |    7 +
>  net/core/Makefile             |    1 +
>  net/core/dev.c                |   13 ++
>  net/core/netprio_cgroup.c     |  340 +++++++++++++++++++++++++++++++++++++++++
>  net/core/sock.c               |   22 +++-
>  net/socket.c                  |    2 +
>  10 files changed, 465 insertions(+), 1 deletions(-)
>  create mode 100644 include/net/netprio_cgroup.h
>  create mode 100644 net/core/netprio_cgroup.c
> 

Hi Neil,

couple more comments.

> diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h
> index ac663c1..0bd390c 100644
> --- a/include/linux/cgroup_subsys.h
> +++ b/include/linux/cgroup_subsys.h
> @@ -59,8 +59,16 @@ SUBSYS(net_cls)
>  SUBSYS(blkio)
>  #endif
> 
> +/* */
> +
>  #ifdef CONFIG_CGROUP_PERF
>  SUBSYS(perf)
>  #endif
> 
>  /* */
> +
> +#ifdef CONFIG_NETPRIO_CGROUP
> +SUBSYS(net_prio)
> +#endif
> +
> +/* */
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 0db1f5f..86e8c3f 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -50,6 +50,7 @@
>  #ifdef CONFIG_DCB
>  #include <net/dcbnl.h>
>  #endif
> +#include <net/netprio_cgroup.h>
> 
>  struct vlan_group;
>  struct netpoll_info;
> @@ -1312,6 +1313,9 @@ struct net_device {
>         /* max exchange id for FCoE LRO by ddp */
>         unsigned int            fcoe_ddp_xid;
>  #endif
> +#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
> +       struct netprio_map *priomap;
> +#endif

Any reason not to annotate this? 'struct netprio_map __rcu *priomap;' and
then use rcu_dereference_protected() throughout.

>         /* phy device may attach itself for hardware timestamping */
>         struct phy_device *phydev;
> 
> diff --git a/include/net/netprio_cgroup.h b/include/net/netprio_cgroup.h
> new file mode 100644
> index 0000000..6b65936
> --- /dev/null
> +++ b/include/net/netprio_cgroup.h
> @@ -0,0 +1,66 @@
> +/*
> + * 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);
> +extern void skb_update_prio(struct sk_buff *skb);
> +
> +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 */
> diff --git a/include/net/sock.h b/include/net/sock.h
> index 5ac682f..87b24aa 100644
> --- a/include/net/sock.h
> +++ b/include/net/sock.h
> @@ -321,6 +321,9 @@ struct sock {
>         unsigned short          sk_ack_backlog;
>         unsigned short          sk_max_ack_backlog;
>         __u32                   sk_priority;
> +#ifdef CONFIG_CGROUPS
> +       __u32                   sk_cgrp_prioidx;
> +#endif
>         struct pid              *sk_peer_pid;
>         const struct cred       *sk_peer_cred;
>         long                    sk_rcvtimeo;
> diff --git a/net/Kconfig b/net/Kconfig
> index a073148..63d2c5d 100644
> --- a/net/Kconfig
> +++ b/net/Kconfig
> @@ -232,6 +232,13 @@ config XPS
>         depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
>         default y
> 
> +config NETPRIO_CGROUP
> +       tristate "Network priority cgroup"
> +       depends on CGROUPS
> +       ---help---
> +         Cgroup subsystem for use in assigning processes to network priorities on
> +         a per-interface basis
> +
>  config HAVE_BPF_JIT
>         bool
> 
> diff --git a/net/core/Makefile b/net/core/Makefile
> index 0d357b1..3606d40 100644
> --- a/net/core/Makefile
> +++ b/net/core/Makefile
> @@ -19,3 +19,4 @@ obj-$(CONFIG_FIB_RULES) += fib_rules.o
>  obj-$(CONFIG_TRACEPOINTS) += net-traces.o
>  obj-$(CONFIG_NET_DROP_MONITOR) += drop_monitor.o
>  obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += timestamping.o
> +obj-$(CONFIG_NETPRIO_CGROUP) += netprio_cgroup.o
> diff --git a/net/core/dev.c b/net/core/dev.c
> index b7ba81a..a1dca83 100644
> --- a/net/core/dev.c
> +++ b/net/core/dev.c
> @@ -2456,6 +2456,17 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
>         return rc;
>  }
> 
> +#ifdef CONFIG_CGROUPS
> +void skb_update_prio(struct sk_buff *skb)
> +{
> +       struct netprio_map *map = rcu_dereference(skb->dev->priomap);
> +
> +       if ((!skb->priority) && (skb->sk) && map)
> +               skb->priority = map->priomap[skb->sk->sk_cgrp_prioidx];
> +}
> +EXPORT_SYMBOL_GPL(skb_update_prio);
> +#endif
> +
>  static DEFINE_PER_CPU(int, xmit_recursion);
>  #define RECURSION_LIMIT 10
> 
> @@ -2496,6 +2507,8 @@ int dev_queue_xmit(struct sk_buff *skb)
>          */
>         rcu_read_lock_bh();
> 
> +       skb_update_prio(skb);
> +
>         txq = dev_pick_tx(dev, skb);
>         q = rcu_dereference_bh(txq->qdisc);
> 
> diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
> new file mode 100644
> index 0000000..14e896c
> --- /dev/null
> +++ b/net/core/netprio_cgroup.c
> @@ -0,0 +1,340 @@
> +/*
> + * net/sched/cls_cgroup.c      Control Group Classifier
          ^^^^^^^^^^^^^^^^^^
should be netprio_cgroup.c presumably.

> + *
> + *             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.
> + *
> + * Authors:    Thomas Graf <tgraf@suug.ch>
> + */
> +
> +#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/atomic.h>
> +#include <net/rtnetlink.h>
> +#include <net/pkt_cls.h>
> +#include <net/sock.h>
> +#include <net/netprio_cgroup.h>
> +
> +static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
> +                                              struct cgroup *cgrp);
> +static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp);
> +static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp);
> +
> +struct cgroup_subsys net_prio_subsys = {
> +       .name           = "net_prio",
> +       .create         = cgrp_create,
> +       .destroy        = cgrp_destroy,
> +       .populate       = cgrp_populate,
> +#ifdef CONFIG_NETPRIO_CGROUP
> +       .subsys_id      = net_prio_subsys_id,
> +#endif
> +       .module         = THIS_MODULE
> +};
> +
> +#define PRIOIDX_SZ 128
> +
> +static unsigned long prioidx_map[PRIOIDX_SZ];
> +static DEFINE_SPINLOCK(prioidx_map_lock);
> +static atomic_t max_prioidx = ATOMIC_INIT(0);
> +
> +static inline struct cgroup_netprio_state *cgrp_netprio_state(struct cgroup *cgrp)
> +{
> +       return container_of(cgroup_subsys_state(cgrp, net_prio_subsys_id),
> +                           struct cgroup_netprio_state, css);
> +}
> +
> +static int get_prioidx(u32 *prio)
> +{
> +       unsigned long flags;
> +       u32 prioidx;
> +
> +       spin_lock_irqsave(&prioidx_map_lock, flags);
> +       prioidx = find_first_zero_bit(prioidx_map, sizeof(unsigned long) * PRIOIDX_SZ);
> +       set_bit(prioidx, prioidx_map);
> +       spin_unlock_irqrestore(&prioidx_map_lock, flags);
> +       if (prioidx == sizeof(unsigned long) * PRIOIDX_SZ)
> +               return -ENOSPC;
> +
> +       atomic_set(&max_prioidx, prioidx);
> +       *prio = prioidx;
> +       return 0;
> +}
> +
> +static void put_prioidx(u32 idx)
> +{
> +       unsigned long flags;
> +       spin_lock_irqsave(&prioidx_map_lock, flags);
> +       clear_bit(idx, prioidx_map);
> +       spin_unlock_irqrestore(&prioidx_map_lock, flags);
> +}
> +
> +static void extend_netdev_table(struct net_device *dev, u32 new_len)
> +{
> +       size_t new_size = sizeof(struct netprio_map) +
> +                          ((sizeof(u32) * new_len));
> +       struct netprio_map *new_priomap = kzalloc(new_size, GFP_KERNEL);
> +       struct netprio_map *old_priomap;
> +       int i;
> +
> +       old_priomap  = rcu_dereference_protected(dev->priomap, 1);

This always has rtnl_lock hence the '1' so use rtnl_dereference().

> +

also extra white line.

> +
> +       if (!new_priomap) {
> +               printk(KERN_WARNING "Unable to alloc new priomap!\n");
> +               return;
> +       }
> +
> +       for (i = 0;
> +            dev->priomap && (i < dev->priomap->priomap_len);
               ^^^^^^^^^^^^         ^^^^^^^^^^^^^ 
probably should use old_priomap here.

> +            i++)
> +               new_priomap->priomap[i] = dev->priomap->priomap[i];
> +
> +       new_priomap->priomap_len = new_len;
> +
> +       rcu_assign_pointer(dev->priomap, new_priomap);
> +       if (old_priomap)
> +               kfree_rcu(old_priomap, rcu);
> +

remove extra line.

> +}
> +
> +static void update_netdev_tables(void)
> +{
> +       struct net_device *dev;
> +       u32 max_len = atomic_read(&max_prioidx);
> +
> +       rtnl_lock();
> +
> +       for_each_netdev(&init_net, dev) {
> +               if ((!dev->priomap) ||
> +                   (dev->priomap->priomap_len < max_len))
> +                       extend_netdev_table(dev, max_len);

With __rcu change add rtnl_dereference()

> +       }
> +
> +       rtnl_unlock();
> +}
> +
> +static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
> +                                                struct cgroup *cgrp)
> +{
> +       struct cgroup_netprio_state *cs;
> +       int ret;
> +
> +       cs = kzalloc(sizeof(*cs), GFP_KERNEL);
> +       if (!cs)
> +               return ERR_PTR(-ENOMEM);
> +
> +       if (cgrp->parent && cgrp_netprio_state(cgrp->parent)->prioidx)
> +               return ERR_PTR(-EINVAL);
> +
> +       ret = get_prioidx(&cs->prioidx);
> +       if (ret != 0) {
> +               printk(KERN_WARNING "No space in priority index array\n");
> +               return ERR_PTR(ret);
> +       }
> +
> +       return &cs->css;
> +}
> +
> +static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
> +{
> +       struct cgroup_netprio_state *cs;
> +       struct net_device *dev;
> +
> +       cs = cgrp_netprio_state(cgrp);
> +       rtnl_lock();
> +       for_each_netdev(&init_net, dev) {
> +               if (dev->priomap)

ditto rtnl_dereference()

> +                       dev->priomap->priomap[cs->prioidx] = 0;
> +       }
> +       rtnl_unlock();
> +       put_prioidx(cs->prioidx);
> +out_free:
> +       kfree(cs);
> +}
> +
> +static u64 read_prioidx(struct cgroup *cgrp, struct cftype *cft)
> +{
> +       return (u64)cgrp_netprio_state(cgrp)->prioidx;
> +}
> +
> +static int read_priomap(struct cgroup *cont, struct cftype *cft,
> +                       struct cgroup_map_cb *cb)
> +{
> +       struct net_device *dev;
> +       u32 prioidx = cgrp_netprio_state(cont)->prioidx;
> +       u32 priority;
> +
> +       /*
> +        * Stub until I add the per-interface priority map
> +        */

we have a per interface map now... so drop the comments.

> +       rcu_read_lock();
> +       for_each_netdev_rcu(&init_net, dev) {
> +               priority = dev->priomap ? dev->priomap->priomap[prioidx] : 0;


This really needs a rcu_dereference() AFAICT.

> +               cb->fill(cb, dev->name, priority);
> +       }
> +       rcu_read_unlock();
> +       return 0;
> +}
> +
> +static int write_priomap(struct cgroup *cgrp, struct cftype *cft,
> +                        const char *buffer)
> +{
> +       char *devname = kstrdup(buffer, GFP_KERNEL);
> +       int ret = -EINVAL;
> +       u32 prioidx = cgrp_netprio_state(cgrp)->prioidx;
> +       unsigned long priority;
> +       char *priostr;
> +       struct net_device *dev;
> +
> +       devname = kstrdup(buffer, GFP_KERNEL);
> +       if (!devname)
> +               return -ENOMEM;
> +
> +       /*
> +        * Minimally sized valid priomap string
> +        */
> +       if (strlen(devname) < 3)
> +               goto out_free_devname;
> +
> +       priostr = strstr(devname, " ");
> +       if (!priostr)
> +               goto out_free_devname;
> +
> +       /*
> +        *Separate the devname from the associated priority
> +        *and advance the priostr poitner to the priority value
> +        */
> +       *priostr = '\0';
> +       priostr++;
> +
> +       /*
> +        * If the priostr points to NULL, we're at the end of the passed
> +        * in string, and its not a valid write
> +        */
> +       if (*priostr == '\0')
> +               goto out_free_devname;
> +
> +       ret = kstrtoul(priostr, 10, &priority);
> +       if (ret < 0)
> +               goto out_free_devname;
> +
> +       ret = -ENODEV;
> +
> +       dev = dev_get_by_name(&init_net, devname);
> +       if (!dev)
> +               goto out_free_devname;
> +
> +       update_netdev_tables();
> +       ret = 0;
> +       if (dev->priomap)
> +               dev->priomap->priomap[prioidx] = priority;
> +

Whats protecting this? This needs a dereference and rcu_read_lock() I think.

> +       dev_put(dev);
> +
> +out_free_devname:
> +       kfree(devname);
> +       return ret;
> +}
> +
> +static struct cftype ss_files[] = {
> +       {
> +               .name = "prioidx",
> +               .read_u64 = read_prioidx,
> +       },
> +       {
> +               .name = "ifpriomap",
> +               .read_map = read_priomap,
> +               .write_string = write_priomap,
> +       },
> +};
> +
> +static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
> +{
> +       return cgroup_add_files(cgrp, ss, ss_files, ARRAY_SIZE(ss_files));
> +}
> +
> +static int netprio_device_event(struct notifier_block *unused,
> +                               unsigned long event, void *ptr)
> +{
> +       struct net_device *dev = ptr;
> +       struct netprio_map *old;
> +       u32 max_len = atomic_read(&max_prioidx);
> +
> +       old = rcu_dereference_protected(dev->priomap, 1);
> +       /*
> +        * Note this is called with rtnl_lock held so we have update side
> +        * protection on our rcu assignments
> +        */
> +
> +       switch (event) {
> +
> +       case NETDEV_REGISTER:
> +               if (max_len)
> +                       extend_netdev_table(dev, max_len);
> +               break;
> +       case NETDEV_UNREGISTER:
> +               rcu_assign_pointer(dev->priomap, NULL);
> +               if (old)
> +                       kfree_rcu(old, rcu);
> +               break;
> +       }
> +       return NOTIFY_DONE;
> +}
> +
> +static struct notifier_block netprio_device_notifier = {
> +       .notifier_call = netprio_device_event
> +};
> +
> +static int __init init_cgroup_netprio(void)
> +{
> +       int ret;
> +
> +       ret = cgroup_load_subsys(&net_prio_subsys);
> +       if (ret)
> +               goto out;
> +#ifndef CONFIG_NETPRIO_CGROUP
> +       smp_wmb();
> +       net_prio_subsys_id = net_prio_subsys.subsys_id;
> +#endif
> +
> +       register_netdevice_notifier(&netprio_device_notifier);
> +
> +out:
> +       return ret;
> +}
> +
> +static void __exit exit_cgroup_netprio(void)
> +{
> +       struct netprio_map *old;
> +       struct net_device *dev;
> +
> +       unregister_netdevice_notifier(&netprio_device_notifier);
> +
> +       cgroup_unload_subsys(&net_prio_subsys);
> +
> +#ifndef CONFIG_NETPRIO_CGROUP
> +       net_prio_subsys_id = -1;
> +       synchronize_rcu();
> +#endif
> +
> +       rtnl_lock();
> +       for_each_netdev(&init_net, dev) {
> +               old = dev->priomap;

rtnl_dereference() here also if adding __rcu

> +               rcu_assign_pointer(dev->priomap, NULL);
> +               if (old)
> +                       kfree_rcu(old, rcu);
> +       }
> +       rtnl_unlock();
> +}
> +
> +module_init(init_cgroup_netprio);
> +module_exit(exit_cgroup_netprio);
> +MODULE_LICENSE("GPL v2");
> diff --git a/net/core/sock.c b/net/core/sock.c
> index 5a08762..77a4888 100644
> --- a/net/core/sock.c
> +++ b/net/core/sock.c
> @@ -125,6 +125,7 @@
>  #include <net/xfrm.h>
>  #include <linux/ipsec.h>
>  #include <net/cls_cgroup.h>
> +#include <net/netprio_cgroup.h>
> 
>  #include <linux/filter.h>
> 
> @@ -221,10 +222,16 @@ __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
>  int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512);
>  EXPORT_SYMBOL(sysctl_optmem_max);
> 
> -#if defined(CONFIG_CGROUPS) && !defined(CONFIG_NET_CLS_CGROUP)
> +#if defined(CONFIG_CGROUPS)
> +#if !defined(CONFIG_NET_CLS_CGROUP)
>  int net_cls_subsys_id = -1;
>  EXPORT_SYMBOL_GPL(net_cls_subsys_id);
>  #endif
> +#if !defined(CONFIG_NETPRIO_CGROUP)
> +int net_prio_subsys_id = -1;
> +EXPORT_SYMBOL_GPL(net_prio_subsys_id);
> +#endif
> +#endif
> 
>  static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
>  {
> @@ -1111,6 +1118,18 @@ void sock_update_classid(struct sock *sk)
>                 sk->sk_classid = classid;
>  }
>  EXPORT_SYMBOL(sock_update_classid);
> +
> +void sock_update_netprioidx(struct sock *sk)
> +{
> +       struct cgroup_netprio_state *state;
> +       if (in_interrupt())
> +               return;
> +       rcu_read_lock();
> +       state = task_netprio_state(current);
> +       sk->sk_cgrp_prioidx = state ? state->prioidx : 0;
> +       rcu_read_unlock();
> +}
> +EXPORT_SYMBOL_GPL(sock_update_netprioidx);
>  #endif
> 
>  /**
> @@ -1138,6 +1157,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
>                 atomic_set(&sk->sk_wmem_alloc, 1);
> 
>                 sock_update_classid(sk);
> +               sock_update_netprioidx(sk);
>         }
> 
>         return sk;
> diff --git a/net/socket.c b/net/socket.c
> index 2877647..108716f 100644
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -549,6 +549,8 @@ static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock,
> 
>         sock_update_classid(sock->sk);
> 
> +       sock_update_netprioidx(sock->sk);
> +
>         si->sock = sock;
>         si->scm = NULL;
>         si->msg = msg;
> --
> 1.7.6.4
> 

Re: [PATCH 1/2] net: add network priority cgroup infrastructure

[Neil Horman]

On Thu, Nov 17, 2011 at 03:25:58AM -0800, John Fastabend wrote:
> On 11/16/2011 12:51 PM, Neil Horman wrote:
> > 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>
> > ---
> >  include/linux/cgroup_subsys.h |    8 +
> >  include/linux/netdevice.h     |    4 +
> >  include/net/netprio_cgroup.h  |   66 ++++++++
> >  include/net/sock.h            |    3 +
> >  net/Kconfig                   |    7 +
> >  net/core/Makefile             |    1 +
> >  net/core/dev.c                |   13 ++
> >  net/core/netprio_cgroup.c     |  340 +++++++++++++++++++++++++++++++++++++++++
> >  net/core/sock.c               |   22 +++-
> >  net/socket.c                  |    2 +
> >  10 files changed, 465 insertions(+), 1 deletions(-)
> >  create mode 100644 include/net/netprio_cgroup.h
> >  create mode 100644 net/core/netprio_cgroup.c
> > 
> 
> Hi Neil,
> 
> couple more comments.
> 
Thanks John, I'll fix these points up and post a v2 later today.
Neil

> 

[PATCH 2/2] net: add documentation for net_prio cgroups

[Neil Horman]

Add the requisite documentation to explain to new users how net_prio cgroups work

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>
---
 Documentation/cgroups/net_prio.txt |   53 ++++++++++++++++++++++++++++++++++++
 1 files changed, 53 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/cgroups/net_prio.txt

diff --git a/Documentation/cgroups/net_prio.txt b/Documentation/cgroups/net_prio.txt
new file mode 100644
index 0000000..01b3226
--- /dev/null
+++ b/Documentation/cgroups/net_prio.txt
@@ -0,0 +1,53 @@
+Network priority cgroup
+-------------------------
+
+The Network priority cgroup provides an interface to allow an administrator to
+dynamically set the priority of network traffic generated by various
+applications
+
+Nominally, an application would set the priority of its traffic via the
+SO_PRIORITY socket option.  This however, is not always possible because:
+
+1) The application may not have been coded to set this value
+2) The priority of application traffic is often a site-specific administrative
+   decision rather than an application defined one.
+
+This cgroup allows an administrator to assign a process to a group which defines
+the priority of egress traffic on a given interface. Network priority groups can
+be created by first mounting the cgroup filesystem.
+
+# mount -t cgroup -onet_prio none /sys/fs/cgroup/net_prio
+
+With the above step, the initial group acting as the parent accounting group
+becomes visible at '/sys/fs/cgroup/net_prio'.  This group includes all tasks in
+the system. '/sys/fs/cgroup/net_prio/tasks' lists the tasks in this cgroup.
+
+Each net_prio cgroup contains two files that are subsystem specific
+
+net_prio.prioidx
+This file is read-only, and is simply informative.  It contains a unique integer
+value that the kernel uses as an internal representation of this cgroup.
+
+net_prio.ifpriomap
+This file contains a map of the priorities assigned to traffic originating from
+processes in this group and egressing the system on various interfaces. It
+contains a list of tuples in the form <ifname priority>.  Contents of this file
+can be modified by echoing a string into the file using the same tuple format.
+for example:
+
+echo "eth0 5" > /sys/fs/cgroups/net_prio/iscsi/net_prio.ifpriomap
+
+This command would force any traffic originating from processes belonging to the
+iscsi net_prio cgroup and egressing on interface eth0 to have the priority of
+said traffic set to the value 5. The parent accounting group also has a
+writeable 'net_prio.ifpriomap' file that can be used to set a system default
+priority.
+
+Priorities are set immediately prior to queueing a frame to the device
+queueing discipline (qdisc) so priorities will be assigned prior to the hardware
+queue selection being made.
+
+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.
-- 
1.7.6.4

[PATCH 0/2] net: Add network priority cgroup (v2)

[Neil Horman]

Data Center Bridging environments are currently somewhat limited in their
ability to provide a general mechanism for controlling traffic priority.
Specifically they are unable to administratively control the priority at which
various types of network traffic are sent.
 
Currently, the only ways to set the priority of a network buffer are:

1) Through the use of the SO_PRIORITY socket option
2) By using low level hooks, like a tc action

(1) is difficult from an administrative perspective because it requires that the
application to be coded to not just assume the default priority is sufficient,
and must expose an administrative interface to allow priority adjustment.  Such
a solution is not scalable in a DCB environment

(2) is also difficult, as it requires constant administrative oversight of
applications so as to build appropriate rules to match traffic belonging to
various classes, so that priority can be appropriately set. It is further
limiting when DCB enabled hardware is in use, due to the fact that tc rules are
only run after a root qdisc has been selected (DCB enabled hardware may reserve
hw queues for various traffic classes and needs the priority to be set prior to
selecting the root qdisc)


I've discussed various solutions with John Fastabend, and we saw a cgroup as
being a good general solution to this problem.  The network priority cgroup
allows for a per-interface priority map to be built per cgroup.  Any traffic
originating from an application in a cgroup, that does not explicitly set its
priority with SO_PRIORITY will have its priority assigned to the value
designated for that group on that interface.  This allows a user space daemon,
when conducting LLDP negotiation with a DCB enabled peer to create a cgroup
based on the APP_TLV value received and administratively assign applications to
that priority using the existing cgroup utility infrastructure.

Tested by John and myself, with good results

(v2)
Based on reviews from John F., Amerigo Wang and Neerav Parikh, I've cleaned up
the rcu locking, fixed a memory leak in an error path, and corrected some typos.

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>

[PATCH 1/2] net: add network priority cgroup infrastructure (v2)

[Neil Horman]

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>
---
 include/linux/cgroup_subsys.h |    8 +
 include/linux/netdevice.h     |    4 +
 include/net/netprio_cgroup.h  |   66 ++++++++
 include/net/sock.h            |    3 +
 net/Kconfig                   |    7 +
 net/core/Makefile             |    1 +
 net/core/dev.c                |   13 ++
 net/core/netprio_cgroup.c     |  347 +++++++++++++++++++++++++++++++++++++++++
 net/core/sock.c               |   22 +++-
 net/socket.c                  |    2 +
 10 files changed, 472 insertions(+), 1 deletions(-)
 create mode 100644 include/net/netprio_cgroup.h
 create mode 100644 net/core/netprio_cgroup.c

diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h
index ac663c1..0bd390c 100644
--- a/include/linux/cgroup_subsys.h
+++ b/include/linux/cgroup_subsys.h
@@ -59,8 +59,16 @@ SUBSYS(net_cls)
 SUBSYS(blkio)
 #endif
 
+/* */
+
 #ifdef CONFIG_CGROUP_PERF
 SUBSYS(perf)
 #endif
 
 /* */
+
+#ifdef CONFIG_NETPRIO_CGROUP
+SUBSYS(net_prio)
+#endif
+
+/* */
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 0db1f5f..750ea8e 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -50,6 +50,7 @@
 #ifdef CONFIG_DCB
 #include <net/dcbnl.h>
 #endif
+#include <net/netprio_cgroup.h>
 
 struct vlan_group;
 struct netpoll_info;
@@ -1312,6 +1313,9 @@ struct net_device {
 	/* max exchange id for FCoE LRO by ddp */
 	unsigned int		fcoe_ddp_xid;
 #endif
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
+	struct netprio_map __rcu *priomap;
+#endif
 	/* phy device may attach itself for hardware timestamping */
 	struct phy_device *phydev;
 
diff --git a/include/net/netprio_cgroup.h b/include/net/netprio_cgroup.h
new file mode 100644
index 0000000..6b65936
--- /dev/null
+++ b/include/net/netprio_cgroup.h
@@ -0,0 +1,66 @@
+/*
+ * 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);
+extern void skb_update_prio(struct sk_buff *skb);
+
+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 */
diff --git a/include/net/sock.h b/include/net/sock.h
index 5ac682f..87b24aa 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -321,6 +321,9 @@ struct sock {
 	unsigned short		sk_ack_backlog;
 	unsigned short		sk_max_ack_backlog;
 	__u32			sk_priority;
+#ifdef CONFIG_CGROUPS
+	__u32			sk_cgrp_prioidx;
+#endif
 	struct pid		*sk_peer_pid;
 	const struct cred	*sk_peer_cred;
 	long			sk_rcvtimeo;
diff --git a/net/Kconfig b/net/Kconfig
index a073148..63d2c5d 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -232,6 +232,13 @@ config XPS
 	depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
 	default y
 
+config NETPRIO_CGROUP
+	tristate "Network priority cgroup"
+	depends on CGROUPS
+	---help---
+	  Cgroup subsystem for use in assigning processes to network priorities on
+	  a per-interface basis
+
 config HAVE_BPF_JIT
 	bool
 
diff --git a/net/core/Makefile b/net/core/Makefile
index 0d357b1..3606d40 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -19,3 +19,4 @@ obj-$(CONFIG_FIB_RULES) += fib_rules.o
 obj-$(CONFIG_TRACEPOINTS) += net-traces.o
 obj-$(CONFIG_NET_DROP_MONITOR) += drop_monitor.o
 obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += timestamping.o
+obj-$(CONFIG_NETPRIO_CGROUP) += netprio_cgroup.o
diff --git a/net/core/dev.c b/net/core/dev.c
index b7ba81a..a1dca83 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2456,6 +2456,17 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
 	return rc;
 }
 
+#ifdef CONFIG_CGROUPS
+void skb_update_prio(struct sk_buff *skb)
+{
+	struct netprio_map *map = rcu_dereference(skb->dev->priomap);
+
+	if ((!skb->priority) && (skb->sk) && map)
+		skb->priority = map->priomap[skb->sk->sk_cgrp_prioidx];
+}
+EXPORT_SYMBOL_GPL(skb_update_prio);
+#endif
+
 static DEFINE_PER_CPU(int, xmit_recursion);
 #define RECURSION_LIMIT 10
 
@@ -2496,6 +2507,8 @@ int dev_queue_xmit(struct sk_buff *skb)
 	 */
 	rcu_read_lock_bh();
 
+	skb_update_prio(skb);
+
 	txq = dev_pick_tx(dev, skb);
 	q = rcu_dereference_bh(txq->qdisc);
 
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
new file mode 100644
index 0000000..e5a26fd
--- /dev/null
+++ b/net/core/netprio_cgroup.c
@@ -0,0 +1,347 @@
+/*
+ * net/core/netprio_cgroup.c	Priority Control Group
+ *
+ *		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.
+ *
+ * Authors:	Neil Horman <nhorman@tuxdriver.com>
+ */
+
+#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/atomic.h>
+#include <net/rtnetlink.h>
+#include <net/pkt_cls.h>
+#include <net/sock.h>
+#include <net/netprio_cgroup.h>
+
+static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
+					       struct cgroup *cgrp);
+static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp);
+static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp);
+
+struct cgroup_subsys net_prio_subsys = {
+	.name		= "net_prio",
+	.create		= cgrp_create,
+	.destroy	= cgrp_destroy,
+	.populate	= cgrp_populate,
+#ifdef CONFIG_NETPRIO_CGROUP
+	.subsys_id	= net_prio_subsys_id,
+#endif
+	.module		= THIS_MODULE
+};
+
+#define PRIOIDX_SZ 128
+
+static unsigned long prioidx_map[PRIOIDX_SZ];
+static DEFINE_SPINLOCK(prioidx_map_lock);
+static atomic_t max_prioidx = ATOMIC_INIT(0);
+
+static inline struct cgroup_netprio_state *cgrp_netprio_state(struct cgroup *cgrp)
+{
+	return container_of(cgroup_subsys_state(cgrp, net_prio_subsys_id),
+			    struct cgroup_netprio_state, css);
+}
+
+static int get_prioidx(u32 *prio)
+{
+	unsigned long flags;
+	u32 prioidx;
+
+	spin_lock_irqsave(&prioidx_map_lock, flags);
+	prioidx = find_first_zero_bit(prioidx_map, sizeof(unsigned long) * PRIOIDX_SZ);
+	set_bit(prioidx, prioidx_map);
+	spin_unlock_irqrestore(&prioidx_map_lock, flags);
+	if (prioidx == sizeof(unsigned long) * PRIOIDX_SZ)
+		return -ENOSPC;
+
+	atomic_set(&max_prioidx, prioidx);
+	*prio = prioidx;
+	return 0;
+}
+
+static void put_prioidx(u32 idx)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&prioidx_map_lock, flags);
+	clear_bit(idx, prioidx_map);
+	spin_unlock_irqrestore(&prioidx_map_lock, flags);
+}
+
+static void extend_netdev_table(struct net_device *dev, u32 new_len)
+{
+	size_t new_size = sizeof(struct netprio_map) +
+			   ((sizeof(u32) * new_len));
+	struct netprio_map *new_priomap = kzalloc(new_size, GFP_KERNEL);
+	struct netprio_map *old_priomap;
+	int i;
+
+	old_priomap  = rcu_dereference(dev->priomap);
+
+	if (!new_priomap) {
+		printk(KERN_WARNING "Unable to alloc new priomap!\n");
+		return;
+	}
+
+	for (i = 0;
+	     old_priomap && (i < old_priomap->priomap_len);
+	     i++)
+		new_priomap->priomap[i] = old_priomap->priomap[i];
+
+	new_priomap->priomap_len = new_len;
+
+	rcu_assign_pointer(dev->priomap, new_priomap);
+	if (old_priomap)
+		kfree_rcu(old_priomap, rcu);
+}
+
+static void update_netdev_tables(void)
+{
+	struct net_device *dev;
+	u32 max_len = atomic_read(&max_prioidx);
+	struct netprio_map *map;
+
+	rtnl_lock();
+
+
+	for_each_netdev(&init_net, dev) {
+		map = rcu_dereference(dev->priomap);
+		if ((!map) ||
+		    (map->priomap_len < max_len))
+			extend_netdev_table(dev, max_len);
+	}
+
+	rtnl_unlock();
+}
+
+static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
+						 struct cgroup *cgrp)
+{
+	struct cgroup_netprio_state *cs;
+	int ret;
+
+	cs = kzalloc(sizeof(*cs), GFP_KERNEL);
+	if (!cs)
+		return ERR_PTR(-ENOMEM);
+
+	if (cgrp->parent && cgrp_netprio_state(cgrp->parent)->prioidx) {
+		kfree(cs);
+		return ERR_PTR(-EINVAL);
+	}
+
+	ret = get_prioidx(&cs->prioidx);
+	if (ret != 0) {
+		printk(KERN_WARNING "No space in priority index array\n");
+		kfree(cs);
+		return ERR_PTR(ret);
+	}
+
+	return &cs->css;
+}
+
+static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+	struct cgroup_netprio_state *cs;
+	struct net_device *dev;
+	struct netprio_map *map;
+
+	cs = cgrp_netprio_state(cgrp);
+	rtnl_lock();
+	for_each_netdev(&init_net, dev) {
+		map = rcu_dereference(dev->priomap);
+		if (map)
+			map->priomap[cs->prioidx] = 0;
+	}
+	rtnl_unlock();
+	put_prioidx(cs->prioidx);
+	kfree(cs);
+}
+
+static u64 read_prioidx(struct cgroup *cgrp, struct cftype *cft)
+{
+	return (u64)cgrp_netprio_state(cgrp)->prioidx;
+}
+
+static int read_priomap(struct cgroup *cont, struct cftype *cft,
+			struct cgroup_map_cb *cb)
+{
+	struct net_device *dev;
+	u32 prioidx = cgrp_netprio_state(cont)->prioidx;
+	u32 priority;
+	struct netprio_map *map;
+
+	rcu_read_lock();
+
+	for_each_netdev_rcu(&init_net, dev) {
+		map = rcu_dereference(dev->priomap);
+		priority = map ? map->priomap[prioidx] : 0;
+		cb->fill(cb, dev->name, priority);
+	}
+	rcu_read_unlock();
+	return 0;
+}
+
+static int write_priomap(struct cgroup *cgrp, struct cftype *cft,
+			 const char *buffer)
+{
+	char *devname = kstrdup(buffer, GFP_KERNEL);
+	int ret = -EINVAL;
+	u32 prioidx = cgrp_netprio_state(cgrp)->prioidx;
+	unsigned long priority;
+	char *priostr;
+	struct net_device *dev;
+	struct netprio_map *map;
+
+	if (!devname)
+		return -ENOMEM;
+
+	/*
+	 * Minimally sized valid priomap string
+	 */
+	if (strlen(devname) < 3)
+		goto out_free_devname;
+
+	priostr = strstr(devname, " ");
+	if (!priostr)
+		goto out_free_devname;
+
+	/*
+	 *Separate the devname from the associated priority
+	 *and advance the priostr poitner to the priority value
+	 */
+	*priostr = '\0';
+	priostr++;
+
+	/*
+	 * If the priostr points to NULL, we're at the end of the passed
+	 * in string, and its not a valid write
+	 */
+	if (*priostr == '\0')
+		goto out_free_devname;
+
+	ret = kstrtoul(priostr, 10, &priority);
+	if (ret < 0)
+		goto out_free_devname;
+
+	ret = -ENODEV;
+
+	dev = dev_get_by_name(&init_net, devname);
+	if (!dev)
+		goto out_free_devname;
+
+	update_netdev_tables();
+	ret = 0;
+	rcu_read_lock();
+	map = rcu_dereference(dev->priomap);
+	if (map)
+		map->priomap[prioidx] = priority;
+	rcu_read_unlock();
+	dev_put(dev);
+
+out_free_devname:
+	kfree(devname);
+	return ret;
+}
+
+static struct cftype ss_files[] = {
+	{
+		.name = "prioidx",
+		.read_u64 = read_prioidx,
+	},
+	{
+		.name = "ifpriomap",
+		.read_map = read_priomap,
+		.write_string = write_priomap,
+	},
+};
+
+static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+	return cgroup_add_files(cgrp, ss, ss_files, ARRAY_SIZE(ss_files));
+}
+
+static int netprio_device_event(struct notifier_block *unused,
+				unsigned long event, void *ptr)
+{
+	struct net_device *dev = ptr;
+	struct netprio_map *old;
+	u32 max_len = atomic_read(&max_prioidx);
+
+	old = rcu_dereference_protected(dev->priomap, 1);
+	/*
+	 * Note this is called with rtnl_lock held so we have update side
+	 * protection on our rcu assignments
+	 */
+
+	switch (event) {
+
+	case NETDEV_REGISTER:
+		if (max_len)
+			extend_netdev_table(dev, max_len);
+		break;
+	case NETDEV_UNREGISTER:
+		rcu_assign_pointer(dev->priomap, NULL);
+		if (old)
+			kfree_rcu(old, rcu);
+		break;
+	}
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block netprio_device_notifier = {
+	.notifier_call = netprio_device_event
+};
+
+static int __init init_cgroup_netprio(void)
+{
+	int ret;
+
+	ret = cgroup_load_subsys(&net_prio_subsys);
+	if (ret)
+		goto out;
+#ifndef CONFIG_NETPRIO_CGROUP
+	smp_wmb();
+	net_prio_subsys_id = net_prio_subsys.subsys_id;
+#endif
+
+	register_netdevice_notifier(&netprio_device_notifier);
+
+out:
+	return ret;
+}
+
+static void __exit exit_cgroup_netprio(void)
+{
+	struct netprio_map *old;
+	struct net_device *dev;
+
+	unregister_netdevice_notifier(&netprio_device_notifier);
+
+	cgroup_unload_subsys(&net_prio_subsys);
+
+#ifndef CONFIG_NETPRIO_CGROUP
+	net_prio_subsys_id = -1;
+	synchronize_rcu();
+#endif
+
+	rtnl_lock();
+	for_each_netdev(&init_net, dev) {
+		old = rcu_dereference(dev->priomap);
+		rcu_assign_pointer(dev->priomap, NULL);
+		if (old)
+			kfree_rcu(old, rcu);
+	}
+	rtnl_unlock();
+}
+
+module_init(init_cgroup_netprio);
+module_exit(exit_cgroup_netprio);
+MODULE_LICENSE("GPL v2");
diff --git a/net/core/sock.c b/net/core/sock.c
index 5a08762..77a4888 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -125,6 +125,7 @@
 #include <net/xfrm.h>
 #include <linux/ipsec.h>
 #include <net/cls_cgroup.h>
+#include <net/netprio_cgroup.h>
 
 #include <linux/filter.h>
 
@@ -221,10 +222,16 @@ __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
 int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512);
 EXPORT_SYMBOL(sysctl_optmem_max);
 
-#if defined(CONFIG_CGROUPS) && !defined(CONFIG_NET_CLS_CGROUP)
+#if defined(CONFIG_CGROUPS)
+#if !defined(CONFIG_NET_CLS_CGROUP)
 int net_cls_subsys_id = -1;
 EXPORT_SYMBOL_GPL(net_cls_subsys_id);
 #endif
+#if !defined(CONFIG_NETPRIO_CGROUP)
+int net_prio_subsys_id = -1;
+EXPORT_SYMBOL_GPL(net_prio_subsys_id);
+#endif
+#endif
 
 static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
 {
@@ -1111,6 +1118,18 @@ void sock_update_classid(struct sock *sk)
 		sk->sk_classid = classid;
 }
 EXPORT_SYMBOL(sock_update_classid);
+
+void sock_update_netprioidx(struct sock *sk)
+{
+	struct cgroup_netprio_state *state;
+	if (in_interrupt())
+		return;
+	rcu_read_lock();
+	state = task_netprio_state(current);
+	sk->sk_cgrp_prioidx = state ? state->prioidx : 0;
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(sock_update_netprioidx);
 #endif
 
 /**
@@ -1138,6 +1157,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
 		atomic_set(&sk->sk_wmem_alloc, 1);
 
 		sock_update_classid(sk);
+		sock_update_netprioidx(sk);
 	}
 
 	return sk;
diff --git a/net/socket.c b/net/socket.c
index 2877647..108716f 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -549,6 +549,8 @@ static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock,
 
 	sock_update_classid(sock->sk);
 
+	sock_update_netprioidx(sock->sk);
+
 	si->sock = sock;
 	si->scm = NULL;
 	si->msg = msg;
-- 
1.7.6.4

Re: [PATCH 1/2] net: add network priority cgroup infrastructure (v2)

[John Fastabend]

On 11/17/2011 1:47 PM, Neil Horman wrote:
> 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>
> ---

one more nit... can we convert the rcu_dereference() into rtnl_dereference()
where it is relevant?

/**
 * rtnl_dereference - fetch RCU pointer when updates are prevented by RTNL
 * @p: The pointer to read, prior to dereferencing
 *
 * Return the value of the specified RCU-protected pointer, but omit
 * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because
 * caller holds RTNL.
 */
#define rtnl_dereference(p)                                     \
        rcu_dereference_protected(p, lockdep_rtnl_is_held())

[...]

> +
> +static void extend_netdev_table(struct net_device *dev, u32 new_len)
> +{
> +       size_t new_size = sizeof(struct netprio_map) +
> +                          ((sizeof(u32) * new_len));
> +       struct netprio_map *new_priomap = kzalloc(new_size, GFP_KERNEL);
> +       struct netprio_map *old_priomap;
> +       int i;
> +
> +       old_priomap  = rcu_dereference(dev->priomap);
> +

This could be rtnl_dereference(dev->priomap) to annotate that we always
have the rtnl lock here.

> +       if (!new_priomap) {
> +               printk(KERN_WARNING "Unable to alloc new priomap!\n");
> +               return;
> +       }
> +
> +       for (i = 0;
> +            old_priomap && (i < old_priomap->priomap_len);
> +            i++)
> +               new_priomap->priomap[i] = old_priomap->priomap[i];
> +
> +       new_priomap->priomap_len = new_len;
> +
> +       rcu_assign_pointer(dev->priomap, new_priomap);
> +       if (old_priomap)
> +               kfree_rcu(old_priomap, rcu);
> +}
> +
> +static void update_netdev_tables(void)
> +{
> +       struct net_device *dev;
> +       u32 max_len = atomic_read(&max_prioidx);
> +       struct netprio_map *map;
> +
> +       rtnl_lock();
          ^^^^^^^^^^^
> +
> +
> +       for_each_netdev(&init_net, dev) {
> +               map = rcu_dereference(dev->priomap);

same here rtnl_dereference(dev->priomap);

> +               if ((!map) ||
> +                   (map->priomap_len < max_len))
> +                       extend_netdev_table(dev, max_len);
> +       }
> +
> +       rtnl_unlock();
> +}
> +
> +static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
> +                                                struct cgroup *cgrp)
> +{
> +       struct cgroup_netprio_state *cs;
> +       int ret;
> +
> +       cs = kzalloc(sizeof(*cs), GFP_KERNEL);
> +       if (!cs)
> +               return ERR_PTR(-ENOMEM);
> +
> +       if (cgrp->parent && cgrp_netprio_state(cgrp->parent)->prioidx) {
> +               kfree(cs);
> +               return ERR_PTR(-EINVAL);
> +       }
> +
> +       ret = get_prioidx(&cs->prioidx);
> +       if (ret != 0) {
> +               printk(KERN_WARNING "No space in priority index array\n");
> +               kfree(cs);
> +               return ERR_PTR(ret);
> +       }
> +
> +       return &cs->css;
> +}
> +
> +static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
> +{
> +       struct cgroup_netprio_state *cs;
> +       struct net_device *dev;
> +       struct netprio_map *map;
> +
> +       cs = cgrp_netprio_state(cgrp);
> +       rtnl_lock();
> +       for_each_netdev(&init_net, dev) {
> +               map = rcu_dereference(dev->priomap);

map = rtnl_dereference(dev->priomap)

> +               if (map)
> +                       map->priomap[cs->prioidx] = 0;
> +       }
> +       rtnl_unlock();
> +       put_prioidx(cs->prioidx);
> +       kfree(cs);
> +}
> +
> +static u64 read_prioidx(struct cgroup *cgrp, struct cftype *cft)
> +{
> +       return (u64)cgrp_netprio_state(cgrp)->prioidx;
> +}
> +
> +static int read_priomap(struct cgroup *cont, struct cftype *cft,
> +                       struct cgroup_map_cb *cb)
> +{
> +       struct net_device *dev;
> +       u32 prioidx = cgrp_netprio_state(cont)->prioidx;
> +       u32 priority;
> +       struct netprio_map *map;
> +
> +       rcu_read_lock();
> +
> +       for_each_netdev_rcu(&init_net, dev) {
> +               map = rcu_dereference(dev->priomap);
> +               priority = map ? map->priomap[prioidx] : 0;
> +               cb->fill(cb, dev->name, priority);
> +       }
> +       rcu_read_unlock();
> +       return 0;
> +}
> +

[...]

> +static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
> +{
> +       return cgroup_add_files(cgrp, ss, ss_files, ARRAY_SIZE(ss_files));
> +}
> +
> +static int netprio_device_event(struct notifier_block *unused,
> +                               unsigned long event, void *ptr)
> +{
> +       struct net_device *dev = ptr;
> +       struct netprio_map *old;
> +       u32 max_len = atomic_read(&max_prioidx);
> +
> +       old = rcu_dereference_protected(dev->priomap, 1);

This is protected because of the rtnl lock so use,

old = rtnl_dereference(dev->priomap);

> +       /*
> +        * Note this is called with rtnl_lock held so we have update side
> +        * protection on our rcu assignments
> +        */
> +
> +       switch (event) {
> +
> +       case NETDEV_REGISTER:
> +               if (max_len)
> +                       extend_netdev_table(dev, max_len);
> +               break;
> +       case NETDEV_UNREGISTER:
> +               rcu_assign_pointer(dev->priomap, NULL);
> +               if (old)
> +                       kfree_rcu(old, rcu);
> +               break;
> +       }
> +       return NOTIFY_DONE;
> +}
> +
> +static struct notifier_block netprio_device_notifier = {
> +       .notifier_call = netprio_device_event
> +};
> +

I can roll an update if you want, just let me know.

Thanks,
John

Re: [PATCH 1/2] net: add network priority cgroup infrastructure (v2)

[Neil Horman]

On Thu, Nov 17, 2011 at 07:17:28PM -0800, John Fastabend wrote:
> On 11/17/2011 1:47 PM, Neil Horman wrote:
> > 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>
> > ---
> 
> one more nit... can we convert the rcu_dereference() into rtnl_dereference()
> where it is relevant?
> 
Yeah, I'm sorry, I thought you had typo'ed that, I didn't realize we actualy had
a rtnl specific variant of the rcu_dereference macro.  I'll take care of it
today.
Neil

[PATCH 2/2] net: add documentation for net_prio cgroups (v2)

[Neil Horman]

Add the requisite documentation to explain to new users how net_prio cgroups work

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>
---
 Documentation/cgroups/net_prio.txt |   53 ++++++++++++++++++++++++++++++++++++
 1 files changed, 53 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/cgroups/net_prio.txt

diff --git a/Documentation/cgroups/net_prio.txt b/Documentation/cgroups/net_prio.txt
new file mode 100644
index 0000000..01b3226
--- /dev/null
+++ b/Documentation/cgroups/net_prio.txt
@@ -0,0 +1,53 @@
+Network priority cgroup
+-------------------------
+
+The Network priority cgroup provides an interface to allow an administrator to
+dynamically set the priority of network traffic generated by various
+applications
+
+Nominally, an application would set the priority of its traffic via the
+SO_PRIORITY socket option.  This however, is not always possible because:
+
+1) The application may not have been coded to set this value
+2) The priority of application traffic is often a site-specific administrative
+   decision rather than an application defined one.
+
+This cgroup allows an administrator to assign a process to a group which defines
+the priority of egress traffic on a given interface. Network priority groups can
+be created by first mounting the cgroup filesystem.
+
+# mount -t cgroup -onet_prio none /sys/fs/cgroup/net_prio
+
+With the above step, the initial group acting as the parent accounting group
+becomes visible at '/sys/fs/cgroup/net_prio'.  This group includes all tasks in
+the system. '/sys/fs/cgroup/net_prio/tasks' lists the tasks in this cgroup.
+
+Each net_prio cgroup contains two files that are subsystem specific
+
+net_prio.prioidx
+This file is read-only, and is simply informative.  It contains a unique integer
+value that the kernel uses as an internal representation of this cgroup.
+
+net_prio.ifpriomap
+This file contains a map of the priorities assigned to traffic originating from
+processes in this group and egressing the system on various interfaces. It
+contains a list of tuples in the form <ifname priority>.  Contents of this file
+can be modified by echoing a string into the file using the same tuple format.
+for example:
+
+echo "eth0 5" > /sys/fs/cgroups/net_prio/iscsi/net_prio.ifpriomap
+
+This command would force any traffic originating from processes belonging to the
+iscsi net_prio cgroup and egressing on interface eth0 to have the priority of
+said traffic set to the value 5. The parent accounting group also has a
+writeable 'net_prio.ifpriomap' file that can be used to set a system default
+priority.
+
+Priorities are set immediately prior to queueing a frame to the device
+queueing discipline (qdisc) so priorities will be assigned prior to the hardware
+queue selection being made.
+
+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.
-- 
1.7.6.4

[PATCH 0/2] net: Add network priority cgroup (v3)

[Neil Horman]

Data Center Bridging environments are currently somewhat limited in their
ability to provide a general mechanism for controlling traffic priority.
Specifically they are unable to administratively control the priority at which
various types of network traffic are sent.
 
Currently, the only ways to set the priority of a network buffer are:

1) Through the use of the SO_PRIORITY socket option
2) By using low level hooks, like a tc action

(1) is difficult from an administrative perspective because it requires that the
application to be coded to not just assume the default priority is sufficient,
and must expose an administrative interface to allow priority adjustment.  Such
a solution is not scalable in a DCB environment

(2) is also difficult, as it requires constant administrative oversight of
applications so as to build appropriate rules to match traffic belonging to
various classes, so that priority can be appropriately set. It is further
limiting when DCB enabled hardware is in use, due to the fact that tc rules are
only run after a root qdisc has been selected (DCB enabled hardware may reserve
hw queues for various traffic classes and needs the priority to be set prior to
selecting the root qdisc)


I've discussed various solutions with John Fastabend, and we saw a cgroup as
being a good general solution to this problem.  The network priority cgroup
allows for a per-interface priority map to be built per cgroup.  Any traffic
originating from an application in a cgroup, that does not explicitly set its
priority with SO_PRIORITY will have its priority assigned to the value
designated for that group on that interface.  This allows a user space daemon,
when conducting LLDP negotiation with a DCB enabled peer to create a cgroup
based on the APP_TLV value received and administratively assign applications to
that priority using the existing cgroup utility infrastructure.

Tested by John and myself, with good results

(v2)
Based on reviews from John F., Amerigo Wang and Neerav Parikh, I've cleaned up
the rcu locking, fixed a memory leak in an error path, and corrected some typos.

(v3)
Converted rcu_dereference to rntl_dereference where appropriate as per request
from John F.

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>

[PATCH 1/2] net: add network priority cgroup infrastructure (v3)

[Neil Horman]

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>
---
 include/linux/cgroup_subsys.h |    8 +
 include/linux/netdevice.h     |    4 +
 include/net/netprio_cgroup.h  |   66 ++++++++
 include/net/sock.h            |    3 +
 net/Kconfig                   |    7 +
 net/core/Makefile             |    1 +
 net/core/dev.c                |   13 ++
 net/core/netprio_cgroup.c     |  347 +++++++++++++++++++++++++++++++++++++++++
 net/core/sock.c               |   22 +++-
 net/socket.c                  |    2 +
 10 files changed, 472 insertions(+), 1 deletions(-)
 create mode 100644 include/net/netprio_cgroup.h
 create mode 100644 net/core/netprio_cgroup.c

diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h
index ac663c1..0bd390c 100644
--- a/include/linux/cgroup_subsys.h
+++ b/include/linux/cgroup_subsys.h
@@ -59,8 +59,16 @@ SUBSYS(net_cls)
 SUBSYS(blkio)
 #endif
 
+/* */
+
 #ifdef CONFIG_CGROUP_PERF
 SUBSYS(perf)
 #endif
 
 /* */
+
+#ifdef CONFIG_NETPRIO_CGROUP
+SUBSYS(net_prio)
+#endif
+
+/* */
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 0db1f5f..750ea8e 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -50,6 +50,7 @@
 #ifdef CONFIG_DCB
 #include <net/dcbnl.h>
 #endif
+#include <net/netprio_cgroup.h>
 
 struct vlan_group;
 struct netpoll_info;
@@ -1312,6 +1313,9 @@ struct net_device {
 	/* max exchange id for FCoE LRO by ddp */
 	unsigned int		fcoe_ddp_xid;
 #endif
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
+	struct netprio_map __rcu *priomap;
+#endif
 	/* phy device may attach itself for hardware timestamping */
 	struct phy_device *phydev;
 
diff --git a/include/net/netprio_cgroup.h b/include/net/netprio_cgroup.h
new file mode 100644
index 0000000..6b65936
--- /dev/null
+++ b/include/net/netprio_cgroup.h
@@ -0,0 +1,66 @@
+/*
+ * 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);
+extern void skb_update_prio(struct sk_buff *skb);
+
+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 */
diff --git a/include/net/sock.h b/include/net/sock.h
index 5ac682f..87b24aa 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -321,6 +321,9 @@ struct sock {
 	unsigned short		sk_ack_backlog;
 	unsigned short		sk_max_ack_backlog;
 	__u32			sk_priority;
+#ifdef CONFIG_CGROUPS
+	__u32			sk_cgrp_prioidx;
+#endif
 	struct pid		*sk_peer_pid;
 	const struct cred	*sk_peer_cred;
 	long			sk_rcvtimeo;
diff --git a/net/Kconfig b/net/Kconfig
index a073148..63d2c5d 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -232,6 +232,13 @@ config XPS
 	depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
 	default y
 
+config NETPRIO_CGROUP
+	tristate "Network priority cgroup"
+	depends on CGROUPS
+	---help---
+	  Cgroup subsystem for use in assigning processes to network priorities on
+	  a per-interface basis
+
 config HAVE_BPF_JIT
 	bool
 
diff --git a/net/core/Makefile b/net/core/Makefile
index 0d357b1..3606d40 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -19,3 +19,4 @@ obj-$(CONFIG_FIB_RULES) += fib_rules.o
 obj-$(CONFIG_TRACEPOINTS) += net-traces.o
 obj-$(CONFIG_NET_DROP_MONITOR) += drop_monitor.o
 obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += timestamping.o
+obj-$(CONFIG_NETPRIO_CGROUP) += netprio_cgroup.o
diff --git a/net/core/dev.c b/net/core/dev.c
index b7ba81a..a1dca83 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2456,6 +2456,17 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
 	return rc;
 }
 
+#ifdef CONFIG_CGROUPS
+void skb_update_prio(struct sk_buff *skb)
+{
+	struct netprio_map *map = rcu_dereference(skb->dev->priomap);
+
+	if ((!skb->priority) && (skb->sk) && map)
+		skb->priority = map->priomap[skb->sk->sk_cgrp_prioidx];
+}
+EXPORT_SYMBOL_GPL(skb_update_prio);
+#endif
+
 static DEFINE_PER_CPU(int, xmit_recursion);
 #define RECURSION_LIMIT 10
 
@@ -2496,6 +2507,8 @@ int dev_queue_xmit(struct sk_buff *skb)
 	 */
 	rcu_read_lock_bh();
 
+	skb_update_prio(skb);
+
 	txq = dev_pick_tx(dev, skb);
 	q = rcu_dereference_bh(txq->qdisc);
 
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
new file mode 100644
index 0000000..1e043db
--- /dev/null
+++ b/net/core/netprio_cgroup.c
@@ -0,0 +1,347 @@
+/*
+ * net/core/netprio_cgroup.c	Priority Control Group
+ *
+ *		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.
+ *
+ * Authors:	Neil Horman <nhorman@tuxdriver.com>
+ */
+
+#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/atomic.h>
+#include <net/rtnetlink.h>
+#include <net/pkt_cls.h>
+#include <net/sock.h>
+#include <net/netprio_cgroup.h>
+
+static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
+					       struct cgroup *cgrp);
+static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp);
+static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp);
+
+struct cgroup_subsys net_prio_subsys = {
+	.name		= "net_prio",
+	.create		= cgrp_create,
+	.destroy	= cgrp_destroy,
+	.populate	= cgrp_populate,
+#ifdef CONFIG_NETPRIO_CGROUP
+	.subsys_id	= net_prio_subsys_id,
+#endif
+	.module		= THIS_MODULE
+};
+
+#define PRIOIDX_SZ 128
+
+static unsigned long prioidx_map[PRIOIDX_SZ];
+static DEFINE_SPINLOCK(prioidx_map_lock);
+static atomic_t max_prioidx = ATOMIC_INIT(0);
+
+static inline struct cgroup_netprio_state *cgrp_netprio_state(struct cgroup *cgrp)
+{
+	return container_of(cgroup_subsys_state(cgrp, net_prio_subsys_id),
+			    struct cgroup_netprio_state, css);
+}
+
+static int get_prioidx(u32 *prio)
+{
+	unsigned long flags;
+	u32 prioidx;
+
+	spin_lock_irqsave(&prioidx_map_lock, flags);
+	prioidx = find_first_zero_bit(prioidx_map, sizeof(unsigned long) * PRIOIDX_SZ);
+	set_bit(prioidx, prioidx_map);
+	spin_unlock_irqrestore(&prioidx_map_lock, flags);
+	if (prioidx == sizeof(unsigned long) * PRIOIDX_SZ)
+		return -ENOSPC;
+
+	atomic_set(&max_prioidx, prioidx);
+	*prio = prioidx;
+	return 0;
+}
+
+static void put_prioidx(u32 idx)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&prioidx_map_lock, flags);
+	clear_bit(idx, prioidx_map);
+	spin_unlock_irqrestore(&prioidx_map_lock, flags);
+}
+
+static void extend_netdev_table(struct net_device *dev, u32 new_len)
+{
+	size_t new_size = sizeof(struct netprio_map) +
+			   ((sizeof(u32) * new_len));
+	struct netprio_map *new_priomap = kzalloc(new_size, GFP_KERNEL);
+	struct netprio_map *old_priomap;
+	int i;
+
+	old_priomap  = rtnl_dereference(dev->priomap);
+
+	if (!new_priomap) {
+		printk(KERN_WARNING "Unable to alloc new priomap!\n");
+		return;
+	}
+
+	for (i = 0;
+	     old_priomap && (i < old_priomap->priomap_len);
+	     i++)
+		new_priomap->priomap[i] = old_priomap->priomap[i];
+
+	new_priomap->priomap_len = new_len;
+
+	rcu_assign_pointer(dev->priomap, new_priomap);
+	if (old_priomap)
+		kfree_rcu(old_priomap, rcu);
+}
+
+static void update_netdev_tables(void)
+{
+	struct net_device *dev;
+	u32 max_len = atomic_read(&max_prioidx);
+	struct netprio_map *map;
+
+	rtnl_lock();
+
+
+	for_each_netdev(&init_net, dev) {
+		map = rtnl_dereference(dev->priomap);
+		if ((!map) ||
+		    (map->priomap_len < max_len))
+			extend_netdev_table(dev, max_len);
+	}
+
+	rtnl_unlock();
+}
+
+static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
+						 struct cgroup *cgrp)
+{
+	struct cgroup_netprio_state *cs;
+	int ret;
+
+	cs = kzalloc(sizeof(*cs), GFP_KERNEL);
+	if (!cs)
+		return ERR_PTR(-ENOMEM);
+
+	if (cgrp->parent && cgrp_netprio_state(cgrp->parent)->prioidx) {
+		kfree(cs);
+		return ERR_PTR(-EINVAL);
+	}
+
+	ret = get_prioidx(&cs->prioidx);
+	if (ret != 0) {
+		printk(KERN_WARNING "No space in priority index array\n");
+		kfree(cs);
+		return ERR_PTR(ret);
+	}
+
+	return &cs->css;
+}
+
+static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+	struct cgroup_netprio_state *cs;
+	struct net_device *dev;
+	struct netprio_map *map;
+
+	cs = cgrp_netprio_state(cgrp);
+	rtnl_lock();
+	for_each_netdev(&init_net, dev) {
+		map = rtnl_dereference(dev->priomap);
+		if (map)
+			map->priomap[cs->prioidx] = 0;
+	}
+	rtnl_unlock();
+	put_prioidx(cs->prioidx);
+	kfree(cs);
+}
+
+static u64 read_prioidx(struct cgroup *cgrp, struct cftype *cft)
+{
+	return (u64)cgrp_netprio_state(cgrp)->prioidx;
+}
+
+static int read_priomap(struct cgroup *cont, struct cftype *cft,
+			struct cgroup_map_cb *cb)
+{
+	struct net_device *dev;
+	u32 prioidx = cgrp_netprio_state(cont)->prioidx;
+	u32 priority;
+	struct netprio_map *map;
+
+	rcu_read_lock();
+
+	for_each_netdev_rcu(&init_net, dev) {
+		map = rcu_dereference(dev->priomap);
+		priority = map ? map->priomap[prioidx] : 0;
+		cb->fill(cb, dev->name, priority);
+	}
+	rcu_read_unlock();
+	return 0;
+}
+
+static int write_priomap(struct cgroup *cgrp, struct cftype *cft,
+			 const char *buffer)
+{
+	char *devname = kstrdup(buffer, GFP_KERNEL);
+	int ret = -EINVAL;
+	u32 prioidx = cgrp_netprio_state(cgrp)->prioidx;
+	unsigned long priority;
+	char *priostr;
+	struct net_device *dev;
+	struct netprio_map *map;
+
+	if (!devname)
+		return -ENOMEM;
+
+	/*
+	 * Minimally sized valid priomap string
+	 */
+	if (strlen(devname) < 3)
+		goto out_free_devname;
+
+	priostr = strstr(devname, " ");
+	if (!priostr)
+		goto out_free_devname;
+
+	/*
+	 *Separate the devname from the associated priority
+	 *and advance the priostr poitner to the priority value
+	 */
+	*priostr = '\0';
+	priostr++;
+
+	/*
+	 * If the priostr points to NULL, we're at the end of the passed
+	 * in string, and its not a valid write
+	 */
+	if (*priostr == '\0')
+		goto out_free_devname;
+
+	ret = kstrtoul(priostr, 10, &priority);
+	if (ret < 0)
+		goto out_free_devname;
+
+	ret = -ENODEV;
+
+	dev = dev_get_by_name(&init_net, devname);
+	if (!dev)
+		goto out_free_devname;
+
+	update_netdev_tables();
+	ret = 0;
+	rcu_read_lock();
+	map = rcu_dereference(dev->priomap);
+	if (map)
+		map->priomap[prioidx] = priority;
+	rcu_read_unlock();
+	dev_put(dev);
+
+out_free_devname:
+	kfree(devname);
+	return ret;
+}
+
+static struct cftype ss_files[] = {
+	{
+		.name = "prioidx",
+		.read_u64 = read_prioidx,
+	},
+	{
+		.name = "ifpriomap",
+		.read_map = read_priomap,
+		.write_string = write_priomap,
+	},
+};
+
+static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+	return cgroup_add_files(cgrp, ss, ss_files, ARRAY_SIZE(ss_files));
+}
+
+static int netprio_device_event(struct notifier_block *unused,
+				unsigned long event, void *ptr)
+{
+	struct net_device *dev = ptr;
+	struct netprio_map *old;
+	u32 max_len = atomic_read(&max_prioidx);
+
+	/*
+	 * Note this is called with rtnl_lock held so we have update side
+	 * protection on our rcu assignments
+	 */
+
+	switch (event) {
+
+	case NETDEV_REGISTER:
+		if (max_len)
+			extend_netdev_table(dev, max_len);
+		break;
+	case NETDEV_UNREGISTER:
+		old = rtnl_dereference(dev->priomap);
+		rcu_assign_pointer(dev->priomap, NULL);
+		if (old)
+			kfree_rcu(old, rcu);
+		break;
+	}
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block netprio_device_notifier = {
+	.notifier_call = netprio_device_event
+};
+
+static int __init init_cgroup_netprio(void)
+{
+	int ret;
+
+	ret = cgroup_load_subsys(&net_prio_subsys);
+	if (ret)
+		goto out;
+#ifndef CONFIG_NETPRIO_CGROUP
+	smp_wmb();
+	net_prio_subsys_id = net_prio_subsys.subsys_id;
+#endif
+
+	register_netdevice_notifier(&netprio_device_notifier);
+
+out:
+	return ret;
+}
+
+static void __exit exit_cgroup_netprio(void)
+{
+	struct netprio_map *old;
+	struct net_device *dev;
+
+	unregister_netdevice_notifier(&netprio_device_notifier);
+
+	cgroup_unload_subsys(&net_prio_subsys);
+
+#ifndef CONFIG_NETPRIO_CGROUP
+	net_prio_subsys_id = -1;
+	synchronize_rcu();
+#endif
+
+	rtnl_lock();
+	for_each_netdev(&init_net, dev) {
+		old = rtnl_dereference(dev->priomap);
+		rcu_assign_pointer(dev->priomap, NULL);
+		if (old)
+			kfree_rcu(old, rcu);
+	}
+	rtnl_unlock();
+}
+
+module_init(init_cgroup_netprio);
+module_exit(exit_cgroup_netprio);
+MODULE_LICENSE("GPL v2");
diff --git a/net/core/sock.c b/net/core/sock.c
index 5a08762..77a4888 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -125,6 +125,7 @@
 #include <net/xfrm.h>
 #include <linux/ipsec.h>
 #include <net/cls_cgroup.h>
+#include <net/netprio_cgroup.h>
 
 #include <linux/filter.h>
 
@@ -221,10 +222,16 @@ __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
 int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512);
 EXPORT_SYMBOL(sysctl_optmem_max);
 
-#if defined(CONFIG_CGROUPS) && !defined(CONFIG_NET_CLS_CGROUP)
+#if defined(CONFIG_CGROUPS)
+#if !defined(CONFIG_NET_CLS_CGROUP)
 int net_cls_subsys_id = -1;
 EXPORT_SYMBOL_GPL(net_cls_subsys_id);
 #endif
+#if !defined(CONFIG_NETPRIO_CGROUP)
+int net_prio_subsys_id = -1;
+EXPORT_SYMBOL_GPL(net_prio_subsys_id);
+#endif
+#endif
 
 static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
 {
@@ -1111,6 +1118,18 @@ void sock_update_classid(struct sock *sk)
 		sk->sk_classid = classid;
 }
 EXPORT_SYMBOL(sock_update_classid);
+
+void sock_update_netprioidx(struct sock *sk)
+{
+	struct cgroup_netprio_state *state;
+	if (in_interrupt())
+		return;
+	rcu_read_lock();
+	state = task_netprio_state(current);
+	sk->sk_cgrp_prioidx = state ? state->prioidx : 0;
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(sock_update_netprioidx);
 #endif
 
 /**
@@ -1138,6 +1157,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
 		atomic_set(&sk->sk_wmem_alloc, 1);
 
 		sock_update_classid(sk);
+		sock_update_netprioidx(sk);
 	}
 
 	return sk;
diff --git a/net/socket.c b/net/socket.c
index 2877647..108716f 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -549,6 +549,8 @@ static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock,
 
 	sock_update_classid(sock->sk);
 
+	sock_update_netprioidx(sock->sk);
+
 	si->sock = sock;
 	si->scm = NULL;
 	si->msg = msg;
-- 
1.7.6.4

Re: [PATCH 1/2] net: add network priority cgroup infrastructure (v3)

[David Miller]

From: Neil Horman <nhorman@tuxdriver.com>
Date: Fri, 18 Nov 2011 11:13:40 -0500


> +#ifdef CONFIG_CGROUPS
> +void skb_update_prio(struct sk_buff *skb)
> +{
> +	struct netprio_map *map = rcu_dereference(skb->dev->priomap);
> +
> +	if ((!skb->priority) && (skb->sk) && map)
> +		skb->priority = map->priomap[skb->sk->sk_cgrp_prioidx];
> +}
> +EXPORT_SYMBOL_GPL(skb_update_prio);
> +#endif

skb_update_prio() has one call site, right here in this dev.c file.
Mark it static, kill the symbol export, and use the ifdef here to nop
out the implementation when the config option isn't set.

> +	struct netprio_map *map;
> +
> +	rtnl_lock();
> +
> +
> +	for_each_netdev(&init_net, dev) {

There are a few instances of extra empty lines in the code added by
this patch, please do a quick audit and get rid of them.

Otherwise seems ok to me.

Thanks.

Re: [PATCH 1/2] net: add network priority cgroup infrastructure (v3)

[Neil Horman]

On Mon, Nov 21, 2011 at 03:39:23PM -0500, David Miller wrote:
> From: Neil Horman <nhorman@tuxdriver.com>
> Date: Fri, 18 Nov 2011 11:13:40 -0500
> 
> 
> > +#ifdef CONFIG_CGROUPS
> > +void skb_update_prio(struct sk_buff *skb)
> > +{
> > +	struct netprio_map *map = rcu_dereference(skb->dev->priomap);
> > +
> > +	if ((!skb->priority) && (skb->sk) && map)
> > +		skb->priority = map->priomap[skb->sk->sk_cgrp_prioidx];
> > +}
> > +EXPORT_SYMBOL_GPL(skb_update_prio);
> > +#endif
> 
> skb_update_prio() has one call site, right here in this dev.c file.
> Mark it static, kill the symbol export, and use the ifdef here to nop
> out the implementation when the config option isn't set.
> 
> > +	struct netprio_map *map;
> > +
> > +	rtnl_lock();
> > +
> > +
> > +	for_each_netdev(&init_net, dev) {
> 
> There are a few instances of extra empty lines in the code added by
> this patch, please do a quick audit and get rid of them.
> 
> Otherwise seems ok to me.
> 
> Thanks.
Copy that Dave, will respin and repost in the AM.
Neil

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> 

[PATCH 2/2] net: add documentation for net_prio cgroups (v3)

[Neil Horman]

Add the requisite documentation to explain to new users how net_prio cgroups work

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>
---
 Documentation/cgroups/net_prio.txt |   53 ++++++++++++++++++++++++++++++++++++
 1 files changed, 53 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/cgroups/net_prio.txt

diff --git a/Documentation/cgroups/net_prio.txt b/Documentation/cgroups/net_prio.txt
new file mode 100644
index 0000000..01b3226
--- /dev/null
+++ b/Documentation/cgroups/net_prio.txt
@@ -0,0 +1,53 @@
+Network priority cgroup
+-------------------------
+
+The Network priority cgroup provides an interface to allow an administrator to
+dynamically set the priority of network traffic generated by various
+applications
+
+Nominally, an application would set the priority of its traffic via the
+SO_PRIORITY socket option.  This however, is not always possible because:
+
+1) The application may not have been coded to set this value
+2) The priority of application traffic is often a site-specific administrative
+   decision rather than an application defined one.
+
+This cgroup allows an administrator to assign a process to a group which defines
+the priority of egress traffic on a given interface. Network priority groups can
+be created by first mounting the cgroup filesystem.
+
+# mount -t cgroup -onet_prio none /sys/fs/cgroup/net_prio
+
+With the above step, the initial group acting as the parent accounting group
+becomes visible at '/sys/fs/cgroup/net_prio'.  This group includes all tasks in
+the system. '/sys/fs/cgroup/net_prio/tasks' lists the tasks in this cgroup.
+
+Each net_prio cgroup contains two files that are subsystem specific
+
+net_prio.prioidx
+This file is read-only, and is simply informative.  It contains a unique integer
+value that the kernel uses as an internal representation of this cgroup.
+
+net_prio.ifpriomap
+This file contains a map of the priorities assigned to traffic originating from
+processes in this group and egressing the system on various interfaces. It
+contains a list of tuples in the form <ifname priority>.  Contents of this file
+can be modified by echoing a string into the file using the same tuple format.
+for example:
+
+echo "eth0 5" > /sys/fs/cgroups/net_prio/iscsi/net_prio.ifpriomap
+
+This command would force any traffic originating from processes belonging to the
+iscsi net_prio cgroup and egressing on interface eth0 to have the priority of
+said traffic set to the value 5. The parent accounting group also has a
+writeable 'net_prio.ifpriomap' file that can be used to set a system default
+priority.
+
+Priorities are set immediately prior to queueing a frame to the device
+queueing discipline (qdisc) so priorities will be assigned prior to the hardware
+queue selection being made.
+
+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.
-- 
1.7.6.4

[PATCH 0/2] net: Add network priority cgroup (v4)

[Neil Horman]

Data Center Bridging environments are currently somewhat limited in their
ability to provide a general mechanism for controlling traffic priority.
Specifically they are unable to administratively control the priority at which
various types of network traffic are sent.
 
Currently, the only ways to set the priority of a network buffer are:

1) Through the use of the SO_PRIORITY socket option
2) By using low level hooks, like a tc action

(1) is difficult from an administrative perspective because it requires that the
application to be coded to not just assume the default priority is sufficient,
and must expose an administrative interface to allow priority adjustment.  Such
a solution is not scalable in a DCB environment

(2) is also difficult, as it requires constant administrative oversight of
applications so as to build appropriate rules to match traffic belonging to
various classes, so that priority can be appropriately set. It is further
limiting when DCB enabled hardware is in use, due to the fact that tc rules are
only run after a root qdisc has been selected (DCB enabled hardware may reserve
hw queues for various traffic classes and needs the priority to be set prior to
selecting the root qdisc)


I've discussed various solutions with John Fastabend, and we saw a cgroup as
being a good general solution to this problem.  The network priority cgroup
allows for a per-interface priority map to be built per cgroup.  Any traffic
originating from an application in a cgroup, that does not explicitly set its
priority with SO_PRIORITY will have its priority assigned to the value
designated for that group on that interface.  This allows a user space daemon,
when conducting LLDP negotiation with a DCB enabled peer to create a cgroup
based on the APP_TLV value received and administratively assign applications to
that priority using the existing cgroup utility infrastructure.

Tested by John and myself, with good results

(v2)
Based on reviews from John F., Amerigo Wang and Neerav Parikh, I've cleaned up
the rcu locking, fixed a memory leak in an error path, and corrected some typos.

(v3)
Converted rcu_dereference to rntl_dereference where appropriate as per request
from John F.

(v4)
Cleaned up some spacing issues, and optimized the skb_update_priority path as
per request from Dave M.

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>

[PATCH 1/2] net: add network priority cgroup infrastructure (v4)

[Neil Horman]

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>
---
 include/linux/cgroup_subsys.h |    8 +
 include/linux/netdevice.h     |    4 +
 include/net/netprio_cgroup.h  |   65 ++++++++
 include/net/sock.h            |    3 +
 net/Kconfig                   |    7 +
 net/core/Makefile             |    1 +
 net/core/dev.c                |   14 ++
 net/core/netprio_cgroup.c     |  344 +++++++++++++++++++++++++++++++++++++++++
 net/core/sock.c               |   22 +++-
 net/socket.c                  |    2 +
 10 files changed, 469 insertions(+), 1 deletions(-)
 create mode 100644 include/net/netprio_cgroup.h
 create mode 100644 net/core/netprio_cgroup.c

diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h
index ac663c1..0bd390c 100644
--- a/include/linux/cgroup_subsys.h
+++ b/include/linux/cgroup_subsys.h
@@ -59,8 +59,16 @@ SUBSYS(net_cls)
 SUBSYS(blkio)
 #endif
 
+/* */
+
 #ifdef CONFIG_CGROUP_PERF
 SUBSYS(perf)
 #endif
 
 /* */
+
+#ifdef CONFIG_NETPRIO_CGROUP
+SUBSYS(net_prio)
+#endif
+
+/* */
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 0db1f5f..750ea8e 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -50,6 +50,7 @@
 #ifdef CONFIG_DCB
 #include <net/dcbnl.h>
 #endif
+#include <net/netprio_cgroup.h>
 
 struct vlan_group;
 struct netpoll_info;
@@ -1312,6 +1313,9 @@ struct net_device {
 	/* max exchange id for FCoE LRO by ddp */
 	unsigned int		fcoe_ddp_xid;
 #endif
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
+	struct netprio_map __rcu *priomap;
+#endif
 	/* phy device may attach itself for hardware timestamping */
 	struct phy_device *phydev;
 
diff --git a/include/net/netprio_cgroup.h b/include/net/netprio_cgroup.h
new file mode 100644
index 0000000..8cfeb3c
--- /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 */
diff --git a/include/net/sock.h b/include/net/sock.h
index 5ac682f..87b24aa 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -321,6 +321,9 @@ struct sock {
 	unsigned short		sk_ack_backlog;
 	unsigned short		sk_max_ack_backlog;
 	__u32			sk_priority;
+#ifdef CONFIG_CGROUPS
+	__u32			sk_cgrp_prioidx;
+#endif
 	struct pid		*sk_peer_pid;
 	const struct cred	*sk_peer_cred;
 	long			sk_rcvtimeo;
diff --git a/net/Kconfig b/net/Kconfig
index a073148..63d2c5d 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -232,6 +232,13 @@ config XPS
 	depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
 	default y
 
+config NETPRIO_CGROUP
+	tristate "Network priority cgroup"
+	depends on CGROUPS
+	---help---
+	  Cgroup subsystem for use in assigning processes to network priorities on
+	  a per-interface basis
+
 config HAVE_BPF_JIT
 	bool
 
diff --git a/net/core/Makefile b/net/core/Makefile
index 0d357b1..3606d40 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -19,3 +19,4 @@ obj-$(CONFIG_FIB_RULES) += fib_rules.o
 obj-$(CONFIG_TRACEPOINTS) += net-traces.o
 obj-$(CONFIG_NET_DROP_MONITOR) += drop_monitor.o
 obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += timestamping.o
+obj-$(CONFIG_NETPRIO_CGROUP) += netprio_cgroup.o
diff --git a/net/core/dev.c b/net/core/dev.c
index b7ba81a..373c908 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2456,6 +2456,18 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
 	return rc;
 }
 
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
+static void skb_update_prio(struct sk_buff *skb)
+{
+	struct netprio_map *map = rcu_dereference(skb->dev->priomap);
+
+	if ((!skb->priority) && (skb->sk) && map)
+		skb->priority = map->priomap[skb->sk->sk_cgrp_prioidx];
+}
+#else
+#define skb_update_prio(skb)
+#endif
+
 static DEFINE_PER_CPU(int, xmit_recursion);
 #define RECURSION_LIMIT 10
 
@@ -2496,6 +2508,8 @@ int dev_queue_xmit(struct sk_buff *skb)
 	 */
 	rcu_read_lock_bh();
 
+	skb_update_prio(skb);
+
 	txq = dev_pick_tx(dev, skb);
 	q = rcu_dereference_bh(txq->qdisc);
 
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
new file mode 100644
index 0000000..72ad0bc
--- /dev/null
+++ b/net/core/netprio_cgroup.c
@@ -0,0 +1,344 @@
+/*
+ * net/core/netprio_cgroup.c	Priority Control Group
+ *
+ *		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.
+ *
+ * Authors:	Neil Horman <nhorman@tuxdriver.com>
+ */
+
+#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/atomic.h>
+#include <net/rtnetlink.h>
+#include <net/pkt_cls.h>
+#include <net/sock.h>
+#include <net/netprio_cgroup.h>
+
+static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
+					       struct cgroup *cgrp);
+static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp);
+static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp);
+
+struct cgroup_subsys net_prio_subsys = {
+	.name		= "net_prio",
+	.create		= cgrp_create,
+	.destroy	= cgrp_destroy,
+	.populate	= cgrp_populate,
+#ifdef CONFIG_NETPRIO_CGROUP
+	.subsys_id	= net_prio_subsys_id,
+#endif
+	.module		= THIS_MODULE
+};
+
+#define PRIOIDX_SZ 128
+
+static unsigned long prioidx_map[PRIOIDX_SZ];
+static DEFINE_SPINLOCK(prioidx_map_lock);
+static atomic_t max_prioidx = ATOMIC_INIT(0);
+
+static inline struct cgroup_netprio_state *cgrp_netprio_state(struct cgroup *cgrp)
+{
+	return container_of(cgroup_subsys_state(cgrp, net_prio_subsys_id),
+			    struct cgroup_netprio_state, css);
+}
+
+static int get_prioidx(u32 *prio)
+{
+	unsigned long flags;
+	u32 prioidx;
+
+	spin_lock_irqsave(&prioidx_map_lock, flags);
+	prioidx = find_first_zero_bit(prioidx_map, sizeof(unsigned long) * PRIOIDX_SZ);
+	set_bit(prioidx, prioidx_map);
+	spin_unlock_irqrestore(&prioidx_map_lock, flags);
+	if (prioidx == sizeof(unsigned long) * PRIOIDX_SZ)
+		return -ENOSPC;
+
+	atomic_set(&max_prioidx, prioidx);
+	*prio = prioidx;
+	return 0;
+}
+
+static void put_prioidx(u32 idx)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&prioidx_map_lock, flags);
+	clear_bit(idx, prioidx_map);
+	spin_unlock_irqrestore(&prioidx_map_lock, flags);
+}
+
+static void extend_netdev_table(struct net_device *dev, u32 new_len)
+{
+	size_t new_size = sizeof(struct netprio_map) +
+			   ((sizeof(u32) * new_len));
+	struct netprio_map *new_priomap = kzalloc(new_size, GFP_KERNEL);
+	struct netprio_map *old_priomap;
+	int i;
+
+	old_priomap  = rtnl_dereference(dev->priomap);
+
+	if (!new_priomap) {
+		printk(KERN_WARNING "Unable to alloc new priomap!\n");
+		return;
+	}
+
+	for (i = 0;
+	     old_priomap && (i < old_priomap->priomap_len);
+	     i++)
+		new_priomap->priomap[i] = old_priomap->priomap[i];
+
+	new_priomap->priomap_len = new_len;
+
+	rcu_assign_pointer(dev->priomap, new_priomap);
+	if (old_priomap)
+		kfree_rcu(old_priomap, rcu);
+}
+
+static void update_netdev_tables(void)
+{
+	struct net_device *dev;
+	u32 max_len = atomic_read(&max_prioidx);
+	struct netprio_map *map;
+
+	rtnl_lock();
+	for_each_netdev(&init_net, dev) {
+		map = rtnl_dereference(dev->priomap);
+		if ((!map) ||
+		    (map->priomap_len < max_len))
+			extend_netdev_table(dev, max_len);
+	}
+	rtnl_unlock();
+}
+
+static struct cgroup_subsys_state *cgrp_create(struct cgroup_subsys *ss,
+						 struct cgroup *cgrp)
+{
+	struct cgroup_netprio_state *cs;
+	int ret;
+
+	cs = kzalloc(sizeof(*cs), GFP_KERNEL);
+	if (!cs)
+		return ERR_PTR(-ENOMEM);
+
+	if (cgrp->parent && cgrp_netprio_state(cgrp->parent)->prioidx) {
+		kfree(cs);
+		return ERR_PTR(-EINVAL);
+	}
+
+	ret = get_prioidx(&cs->prioidx);
+	if (ret != 0) {
+		printk(KERN_WARNING "No space in priority index array\n");
+		kfree(cs);
+		return ERR_PTR(ret);
+	}
+
+	return &cs->css;
+}
+
+static void cgrp_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+	struct cgroup_netprio_state *cs;
+	struct net_device *dev;
+	struct netprio_map *map;
+
+	cs = cgrp_netprio_state(cgrp);
+	rtnl_lock();
+	for_each_netdev(&init_net, dev) {
+		map = rtnl_dereference(dev->priomap);
+		if (map)
+			map->priomap[cs->prioidx] = 0;
+	}
+	rtnl_unlock();
+	put_prioidx(cs->prioidx);
+	kfree(cs);
+}
+
+static u64 read_prioidx(struct cgroup *cgrp, struct cftype *cft)
+{
+	return (u64)cgrp_netprio_state(cgrp)->prioidx;
+}
+
+static int read_priomap(struct cgroup *cont, struct cftype *cft,
+			struct cgroup_map_cb *cb)
+{
+	struct net_device *dev;
+	u32 prioidx = cgrp_netprio_state(cont)->prioidx;
+	u32 priority;
+	struct netprio_map *map;
+
+	rcu_read_lock();
+	for_each_netdev_rcu(&init_net, dev) {
+		map = rcu_dereference(dev->priomap);
+		priority = map ? map->priomap[prioidx] : 0;
+		cb->fill(cb, dev->name, priority);
+	}
+	rcu_read_unlock();
+	return 0;
+}
+
+static int write_priomap(struct cgroup *cgrp, struct cftype *cft,
+			 const char *buffer)
+{
+	char *devname = kstrdup(buffer, GFP_KERNEL);
+	int ret = -EINVAL;
+	u32 prioidx = cgrp_netprio_state(cgrp)->prioidx;
+	unsigned long priority;
+	char *priostr;
+	struct net_device *dev;
+	struct netprio_map *map;
+
+	if (!devname)
+		return -ENOMEM;
+
+	/*
+	 * Minimally sized valid priomap string
+	 */
+	if (strlen(devname) < 3)
+		goto out_free_devname;
+
+	priostr = strstr(devname, " ");
+	if (!priostr)
+		goto out_free_devname;
+
+	/*
+	 *Separate the devname from the associated priority
+	 *and advance the priostr poitner to the priority value
+	 */
+	*priostr = '\0';
+	priostr++;
+
+	/*
+	 * If the priostr points to NULL, we're at the end of the passed
+	 * in string, and its not a valid write
+	 */
+	if (*priostr == '\0')
+		goto out_free_devname;
+
+	ret = kstrtoul(priostr, 10, &priority);
+	if (ret < 0)
+		goto out_free_devname;
+
+	ret = -ENODEV;
+
+	dev = dev_get_by_name(&init_net, devname);
+	if (!dev)
+		goto out_free_devname;
+
+	update_netdev_tables();
+	ret = 0;
+	rcu_read_lock();
+	map = rcu_dereference(dev->priomap);
+	if (map)
+		map->priomap[prioidx] = priority;
+	rcu_read_unlock();
+	dev_put(dev);
+
+out_free_devname:
+	kfree(devname);
+	return ret;
+}
+
+static struct cftype ss_files[] = {
+	{
+		.name = "prioidx",
+		.read_u64 = read_prioidx,
+	},
+	{
+		.name = "ifpriomap",
+		.read_map = read_priomap,
+		.write_string = write_priomap,
+	},
+};
+
+static int cgrp_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
+{
+	return cgroup_add_files(cgrp, ss, ss_files, ARRAY_SIZE(ss_files));
+}
+
+static int netprio_device_event(struct notifier_block *unused,
+				unsigned long event, void *ptr)
+{
+	struct net_device *dev = ptr;
+	struct netprio_map *old;
+	u32 max_len = atomic_read(&max_prioidx);
+
+	/*
+	 * Note this is called with rtnl_lock held so we have update side
+	 * protection on our rcu assignments
+	 */
+
+	switch (event) {
+
+	case NETDEV_REGISTER:
+		if (max_len)
+			extend_netdev_table(dev, max_len);
+		break;
+	case NETDEV_UNREGISTER:
+		old = rtnl_dereference(dev->priomap);
+		rcu_assign_pointer(dev->priomap, NULL);
+		if (old)
+			kfree_rcu(old, rcu);
+		break;
+	}
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block netprio_device_notifier = {
+	.notifier_call = netprio_device_event
+};
+
+static int __init init_cgroup_netprio(void)
+{
+	int ret;
+
+	ret = cgroup_load_subsys(&net_prio_subsys);
+	if (ret)
+		goto out;
+#ifndef CONFIG_NETPRIO_CGROUP
+	smp_wmb();
+	net_prio_subsys_id = net_prio_subsys.subsys_id;
+#endif
+
+	register_netdevice_notifier(&netprio_device_notifier);
+
+out:
+	return ret;
+}
+
+static void __exit exit_cgroup_netprio(void)
+{
+	struct netprio_map *old;
+	struct net_device *dev;
+
+	unregister_netdevice_notifier(&netprio_device_notifier);
+
+	cgroup_unload_subsys(&net_prio_subsys);
+
+#ifndef CONFIG_NETPRIO_CGROUP
+	net_prio_subsys_id = -1;
+	synchronize_rcu();
+#endif
+
+	rtnl_lock();
+	for_each_netdev(&init_net, dev) {
+		old = rtnl_dereference(dev->priomap);
+		rcu_assign_pointer(dev->priomap, NULL);
+		if (old)
+			kfree_rcu(old, rcu);
+	}
+	rtnl_unlock();
+}
+
+module_init(init_cgroup_netprio);
+module_exit(exit_cgroup_netprio);
+MODULE_LICENSE("GPL v2");
diff --git a/net/core/sock.c b/net/core/sock.c
index 5a08762..77a4888 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -125,6 +125,7 @@
 #include <net/xfrm.h>
 #include <linux/ipsec.h>
 #include <net/cls_cgroup.h>
+#include <net/netprio_cgroup.h>
 
 #include <linux/filter.h>
 
@@ -221,10 +222,16 @@ __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX;
 int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512);
 EXPORT_SYMBOL(sysctl_optmem_max);
 
-#if defined(CONFIG_CGROUPS) && !defined(CONFIG_NET_CLS_CGROUP)
+#if defined(CONFIG_CGROUPS)
+#if !defined(CONFIG_NET_CLS_CGROUP)
 int net_cls_subsys_id = -1;
 EXPORT_SYMBOL_GPL(net_cls_subsys_id);
 #endif
+#if !defined(CONFIG_NETPRIO_CGROUP)
+int net_prio_subsys_id = -1;
+EXPORT_SYMBOL_GPL(net_prio_subsys_id);
+#endif
+#endif
 
 static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
 {
@@ -1111,6 +1118,18 @@ void sock_update_classid(struct sock *sk)
 		sk->sk_classid = classid;
 }
 EXPORT_SYMBOL(sock_update_classid);
+
+void sock_update_netprioidx(struct sock *sk)
+{
+	struct cgroup_netprio_state *state;
+	if (in_interrupt())
+		return;
+	rcu_read_lock();
+	state = task_netprio_state(current);
+	sk->sk_cgrp_prioidx = state ? state->prioidx : 0;
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(sock_update_netprioidx);
 #endif
 
 /**
@@ -1138,6 +1157,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
 		atomic_set(&sk->sk_wmem_alloc, 1);
 
 		sock_update_classid(sk);
+		sock_update_netprioidx(sk);
 	}
 
 	return sk;
diff --git a/net/socket.c b/net/socket.c
index 2877647..108716f 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -549,6 +549,8 @@ static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock,
 
 	sock_update_classid(sock->sk);
 
+	sock_update_netprioidx(sock->sk);
+
 	si->sock = sock;
 	si->scm = NULL;
 	si->msg = msg;
-- 
1.7.6.4

[PATCH 2/2] net: add documentation for net_prio cgroups (v4)

[Neil Horman]

Add the requisite documentation to explain to new users how net_prio cgroups work

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>
---
 Documentation/cgroups/net_prio.txt |   53 ++++++++++++++++++++++++++++++++++++
 1 files changed, 53 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/cgroups/net_prio.txt

diff --git a/Documentation/cgroups/net_prio.txt b/Documentation/cgroups/net_prio.txt
new file mode 100644
index 0000000..01b3226
--- /dev/null
+++ b/Documentation/cgroups/net_prio.txt
@@ -0,0 +1,53 @@
+Network priority cgroup
+-------------------------
+
+The Network priority cgroup provides an interface to allow an administrator to
+dynamically set the priority of network traffic generated by various
+applications
+
+Nominally, an application would set the priority of its traffic via the
+SO_PRIORITY socket option.  This however, is not always possible because:
+
+1) The application may not have been coded to set this value
+2) The priority of application traffic is often a site-specific administrative
+   decision rather than an application defined one.
+
+This cgroup allows an administrator to assign a process to a group which defines
+the priority of egress traffic on a given interface. Network priority groups can
+be created by first mounting the cgroup filesystem.
+
+# mount -t cgroup -onet_prio none /sys/fs/cgroup/net_prio
+
+With the above step, the initial group acting as the parent accounting group
+becomes visible at '/sys/fs/cgroup/net_prio'.  This group includes all tasks in
+the system. '/sys/fs/cgroup/net_prio/tasks' lists the tasks in this cgroup.
+
+Each net_prio cgroup contains two files that are subsystem specific
+
+net_prio.prioidx
+This file is read-only, and is simply informative.  It contains a unique integer
+value that the kernel uses as an internal representation of this cgroup.
+
+net_prio.ifpriomap
+This file contains a map of the priorities assigned to traffic originating from
+processes in this group and egressing the system on various interfaces. It
+contains a list of tuples in the form <ifname priority>.  Contents of this file
+can be modified by echoing a string into the file using the same tuple format.
+for example:
+
+echo "eth0 5" > /sys/fs/cgroups/net_prio/iscsi/net_prio.ifpriomap
+
+This command would force any traffic originating from processes belonging to the
+iscsi net_prio cgroup and egressing on interface eth0 to have the priority of
+said traffic set to the value 5. The parent accounting group also has a
+writeable 'net_prio.ifpriomap' file that can be used to set a system default
+priority.
+
+Priorities are set immediately prior to queueing a frame to the device
+queueing discipline (qdisc) so priorities will be assigned prior to the hardware
+queue selection being made.
+
+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.
-- 
1.7.6.4

Re: [PATCH 0/2] net: Add network priority cgroup (v4)

[David Miller]

From: Neil Horman <nhorman@tuxdriver.com>
Date: Tue, 22 Nov 2011 10:10:50 -0500

> (v2)
> Based on reviews from John F., Amerigo Wang and Neerav Parikh, I've cleaned up
> the rcu locking, fixed a memory leak in an error path, and corrected some typos.
> 
> (v3)
> Converted rcu_dereference to rntl_dereference where appropriate as per request
> from John F.
> 
> (v4)
> Cleaned up some spacing issues, and optimized the skb_update_priority path as
> per request from Dave M.
> 
> 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>

Applied and going through some build testing now, thanks Neil.

Re: [PATCH 0/2] net: Add network priority cgroup (v4)

[Neil Horman]

On Tue, Nov 22, 2011 at 03:23:15PM -0500, David Miller wrote:
> From: Neil Horman <nhorman@tuxdriver.com>
> Date: Tue, 22 Nov 2011 10:10:50 -0500
> 
> > (v2)
> > Based on reviews from John F., Amerigo Wang and Neerav Parikh, I've cleaned up
> > the rcu locking, fixed a memory leak in an error path, and corrected some typos.
> > 
> > (v3)
> > Converted rcu_dereference to rntl_dereference where appropriate as per request
> > from John F.
> > 
> > (v4)
> > Cleaned up some spacing issues, and optimized the skb_update_priority path as
> > per request from Dave M.
> > 
> > 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>
> 
> Applied and going through some build testing now, thanks Neil.
Thanks Dave!  I tested here building separately with:
CONFIG_CGROUPS=n
CONFIG_CROUPS=y && CONFIG_NETPRIO_CGROUP=y
CONFIG_CROUPS=y && CONFIG_NETPRIO_CGROUP=m

So you should be square, but theres rarely any valid accounting for my ability
to screw something up :)


> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

Re: [PATCH 0/2] net: Add network priority cgroup (v4)

[David Miller]

From: Neil Horman <nhorman@tuxdriver.com>
Date: Tue, 22 Nov 2011 15:39:38 -0500

> On Tue, Nov 22, 2011 at 03:23:15PM -0500, David Miller wrote:
>> From: Neil Horman <nhorman@tuxdriver.com>
>> Date: Tue, 22 Nov 2011 10:10:50 -0500
>> 
>> > (v2)
>> > Based on reviews from John F., Amerigo Wang and Neerav Parikh, I've cleaned up
>> > the rcu locking, fixed a memory leak in an error path, and corrected some typos.
>> > 
>> > (v3)
>> > Converted rcu_dereference to rntl_dereference where appropriate as per request
>> > from John F.
>> > 
>> > (v4)
>> > Cleaned up some spacing issues, and optimized the skb_update_priority path as
>> > per request from Dave M.
>> > 
>> > 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>
>> 
>> Applied and going through some build testing now, thanks Neil.
> Thanks Dave!  I tested here building separately with:
> CONFIG_CGROUPS=n
> CONFIG_CROUPS=y && CONFIG_NETPRIO_CGROUP=y
> CONFIG_CROUPS=y && CONFIG_NETPRIO_CGROUP=m
> 
> So you should be square, but theres rarely any valid accounting for my ability
> to screw something up :)

I want to be absolutely sure, because I had to apply your changes by hand,
in particular the linux/netdevice.h changes had line offsets of up to 67.

Re: [PATCH 0/2] net: Add network priority cgroup (v4)

[Neil Horman]

On Tue, Nov 22, 2011 at 03:45:16PM -0500, David Miller wrote:
> From: Neil Horman <nhorman@tuxdriver.com>
> Date: Tue, 22 Nov 2011 15:39:38 -0500
> 
> > On Tue, Nov 22, 2011 at 03:23:15PM -0500, David Miller wrote:
> >> From: Neil Horman <nhorman@tuxdriver.com>
> >> Date: Tue, 22 Nov 2011 10:10:50 -0500
> >> 
> >> > (v2)
> >> > Based on reviews from John F., Amerigo Wang and Neerav Parikh, I've cleaned up
> >> > the rcu locking, fixed a memory leak in an error path, and corrected some typos.
> >> > 
> >> > (v3)
> >> > Converted rcu_dereference to rntl_dereference where appropriate as per request
> >> > from John F.
> >> > 
> >> > (v4)
> >> > Cleaned up some spacing issues, and optimized the skb_update_priority path as
> >> > per request from Dave M.
> >> > 
> >> > 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>
> >> 
> >> Applied and going through some build testing now, thanks Neil.
> > Thanks Dave!  I tested here building separately with:
> > CONFIG_CGROUPS=n
> > CONFIG_CROUPS=y && CONFIG_NETPRIO_CGROUP=y
> > CONFIG_CROUPS=y && CONFIG_NETPRIO_CGROUP=m
> > 
> > So you should be square, but theres rarely any valid accounting for my ability
> > to screw something up :)
> 
> I want to be absolutely sure, because I had to apply your changes by hand,
> in particular the linux/netdevice.h changes had line offsets of up to 67.
Really?  Thats odd, I've got thse changes here applied to a local copy of the
net-next tree.  I branched from commit 8b3408f8ee994973869d8ba32c5bf482bc4ddca4
and it applies cleanly.  Perhaps something wen't in while I was developing this?

Thanks & Regards
Neil

> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

Re: [PATCH 0/2] net: Add network priority cgroup (v4)

[Kirill Smelkov]

[-- Attachment #1: Type: text/plain, Size: 2847 bytes --]

On Tue, Nov 22, 2011 at 04:00:08PM -0500, Neil Horman wrote:
> On Tue, Nov 22, 2011 at 03:45:16PM -0500, David Miller wrote:
> > From: Neil Horman <nhorman@tuxdriver.com>
> > Date: Tue, 22 Nov 2011 15:39:38 -0500
> > 
> > > On Tue, Nov 22, 2011 at 03:23:15PM -0500, David Miller wrote:
> > >> From: Neil Horman <nhorman@tuxdriver.com>
> > >> Date: Tue, 22 Nov 2011 10:10:50 -0500
> > >> 
> > >> > (v2)
> > >> > Based on reviews from John F., Amerigo Wang and Neerav Parikh, I've cleaned up
> > >> > the rcu locking, fixed a memory leak in an error path, and corrected some typos.
> > >> > 
> > >> > (v3)
> > >> > Converted rcu_dereference to rntl_dereference where appropriate as per request
> > >> > from John F.
> > >> > 
> > >> > (v4)
> > >> > Cleaned up some spacing issues, and optimized the skb_update_priority path as
> > >> > per request from Dave M.
> > >> > 
> > >> > 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>
> > >> 
> > >> Applied and going through some build testing now, thanks Neil.
> > > Thanks Dave!  I tested here building separately with:
> > > CONFIG_CGROUPS=n
> > > CONFIG_CROUPS=y && CONFIG_NETPRIO_CGROUP=y
> > > CONFIG_CROUPS=y && CONFIG_NETPRIO_CGROUP=m
> > > 
> > > So you should be square, but theres rarely any valid accounting for my ability
> > > to screw something up :)
> > 
> > I want to be absolutely sure, because I had to apply your changes by hand,
> > in particular the linux/netdevice.h changes had line offsets of up to 67.
> Really?  Thats odd, I've got thse changes here applied to a local copy of the
> net-next tree.  I branched from commit 8b3408f8ee994973869d8ba32c5bf482bc4ddca4
> and it applies cleanly.  Perhaps something wen't in while I was developing this?

The patch broke the build with CONFIG_CGROUPS=n (testing on today's
net-next v3.2-rc2-714-g1f2149c):

kirr@mini:~/src/linux/linux-net-next$ make
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  CC      init/do_mounts.o
In file included from include/linux/netdevice.h:53,
                 from include/linux/icmpv6.h:173,
                 from include/linux/ipv6.h:220,
                 from include/net/ipv6.h:16,
                 from include/linux/sunrpc/clnt.h:26,
                 from include/linux/nfs_fs.h:50,
                 from init/do_mounts.c:20:
include/net/netprio_cgroup.h:23: error: field ‘css’ has incomplete type
scripts/Makefile.build:305: recipe for target `init/do_mounts.o' failed
make[1]: *** [init/do_mounts.o] Error 1
Makefile:945: recipe for target `init' failed
make: *** [init] Error 2


Config attached.


Thanks,
Kirill

[-- Attachment #2: .config --]
[-- Type: text/plain, Size: 65324 bytes --]

#
# Automatically generated file; DO NOT EDIT.
# Linux/i386 3.2.0-rc2 Kernel Configuration
#
# CONFIG_64BIT is not set
CONFIG_X86_32=y
# CONFIG_X86_64 is not set
CONFIG_X86=y
CONFIG_INSTRUCTION_DECODER=y
CONFIG_OUTPUT_FORMAT="elf32-i386"
CONFIG_ARCH_DEFCONFIG="arch/x86/configs/i386_defconfig"
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
# CONFIG_NEED_DMA_MAP_STATE is not set
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
# CONFIG_RWSEM_GENERIC_SPINLOCK is not set
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
# CONFIG_GENERIC_TIME_VSYSCALL is not set
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_ARCH_HAS_DEFAULT_IDLE=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
# CONFIG_ZONE_DMA32 is not set
CONFIG_ARCH_POPULATES_NODE_MAP=y
# CONFIG_AUDIT_ARCH is not set
CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_X86_32_SMP=y
CONFIG_X86_HT=y
CONFIG_X86_32_LAZY_GS=y
CONFIG_ARCH_HWEIGHT_CFLAGS="-fcall-saved-ecx -fcall-saved-edx"
CONFIG_KTIME_SCALAR=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_HAVE_IRQ_WORK=y
CONFIG_IRQ_WORK=y

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_CROSS_COMPILE=""
CONFIG_LOCALVERSION="-netmini"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_BZIP2=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_BZIP2 is not set
# CONFIG_KERNEL_LZMA is not set
# CONFIG_KERNEL_XZ is not set
# CONFIG_KERNEL_LZO is not set
CONFIG_DEFAULT_HOSTNAME="(none)"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
# CONFIG_FHANDLE is not set
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set
CONFIG_HAVE_GENERIC_HARDIRQS=y

#
# IRQ subsystem
#
CONFIG_GENERIC_HARDIRQS=y
CONFIG_HAVE_SPARSE_IRQ=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y

#
# RCU Subsystem
#
CONFIG_TREE_PREEMPT_RCU=y
CONFIG_PREEMPT_RCU=y
# CONFIG_RCU_TRACE is not set
CONFIG_RCU_FANOUT=32
# CONFIG_RCU_FANOUT_EXACT is not set
# CONFIG_TREE_RCU_TRACE is not set
# CONFIG_RCU_BOOST is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=17
CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
# CONFIG_CGROUPS is not set
# CONFIG_NAMESPACES is not set
# CONFIG_SCHED_AUTOGROUP is not set
# CONFIG_SYSFS_DEPRECATED is not set
CONFIG_RELAY=y
# CONFIG_BLK_DEV_INITRD is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
CONFIG_EXPERT=y
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
CONFIG_HAVE_PCSPKR_PLATFORM=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
# CONFIG_EMBEDDED is not set
CONFIG_HAVE_PERF_EVENTS=y

#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
# CONFIG_PERF_COUNTERS is not set
# CONFIG_DEBUG_PERF_USE_VMALLOC is not set
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_PCI_QUIRKS=y
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
# CONFIG_PROFILING is not set
CONFIG_TRACEPOINTS=y
CONFIG_HAVE_OPROFILE=y
CONFIG_KPROBES=y
# CONFIG_JUMP_LABEL is not set
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_KRETPROBES=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_ATTRS=y
CONFIG_USE_GENERIC_SMP_HELPERS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_DMA_API_DEBUG=y
CONFIG_HAVE_HW_BREAKPOINT=y
CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y
CONFIG_HAVE_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_PERF_EVENTS_NMI=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y

#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
# CONFIG_LBDAF is not set
CONFIG_BLK_DEV_BSG=y
# CONFIG_BLK_DEV_BSGLIB is not set
# CONFIG_BLK_DEV_INTEGRITY is not set

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
# CONFIG_INLINE_SPIN_TRYLOCK is not set
# CONFIG_INLINE_SPIN_TRYLOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK is not set
# CONFIG_INLINE_SPIN_LOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK_IRQ is not set
# CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set
# CONFIG_INLINE_SPIN_UNLOCK is not set
# CONFIG_INLINE_SPIN_UNLOCK_BH is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQ is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_READ_TRYLOCK is not set
# CONFIG_INLINE_READ_LOCK is not set
# CONFIG_INLINE_READ_LOCK_BH is not set
# CONFIG_INLINE_READ_LOCK_IRQ is not set
# CONFIG_INLINE_READ_LOCK_IRQSAVE is not set
# CONFIG_INLINE_READ_UNLOCK is not set
# CONFIG_INLINE_READ_UNLOCK_BH is not set
# CONFIG_INLINE_READ_UNLOCK_IRQ is not set
# CONFIG_INLINE_READ_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_WRITE_TRYLOCK is not set
# CONFIG_INLINE_WRITE_LOCK is not set
# CONFIG_INLINE_WRITE_LOCK_BH is not set
# CONFIG_INLINE_WRITE_LOCK_IRQ is not set
# CONFIG_INLINE_WRITE_LOCK_IRQSAVE is not set
# CONFIG_INLINE_WRITE_UNLOCK is not set
# CONFIG_INLINE_WRITE_UNLOCK_BH is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQ is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE is not set
CONFIG_MUTEX_SPIN_ON_OWNER=y
# CONFIG_FREEZER is not set

#
# Processor type and features
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST=y
CONFIG_SMP=y
# CONFIG_X86_MPPARSE is not set
# CONFIG_X86_BIGSMP is not set
# CONFIG_X86_EXTENDED_PLATFORM is not set
CONFIG_X86_SUPPORTS_MEMORY_FAILURE=y
# CONFIG_X86_32_IRIS is not set
CONFIG_SCHED_OMIT_FRAME_POINTER=y
# CONFIG_PARAVIRT_GUEST is not set
CONFIG_NO_BOOTMEM=y
# CONFIG_MEMTEST is not set
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
# CONFIG_M686 is not set
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MELAN is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
# CONFIG_MCORE2 is not set
CONFIG_MATOM=y
# CONFIG_X86_GENERIC is not set
CONFIG_X86_INTERNODE_CACHE_SHIFT=6
CONFIG_X86_CMPXCHG=y
CONFIG_CMPXCHG_LOCAL=y
CONFIG_CMPXCHG_DOUBLE=y
CONFIG_X86_L1_CACHE_SHIFT=6
CONFIG_X86_XADD=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=5
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_PROCESSOR_SELECT=y
CONFIG_CPU_SUP_INTEL=y
# CONFIG_CPU_SUP_CYRIX_32 is not set
# CONFIG_CPU_SUP_AMD is not set
# CONFIG_CPU_SUP_CENTAUR is not set
# CONFIG_CPU_SUP_TRANSMETA_32 is not set
# CONFIG_CPU_SUP_UMC_32 is not set
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
CONFIG_DMI=y
# CONFIG_IOMMU_HELPER is not set
CONFIG_NR_CPUS=2
# CONFIG_SCHED_SMT is not set
# CONFIG_SCHED_MC is not set
# CONFIG_IRQ_TIME_ACCOUNTING is not set
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
CONFIG_PREEMPT_COUNT=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
# CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS is not set
CONFIG_X86_MCE=y
CONFIG_X86_MCE_INTEL=y
# CONFIG_X86_MCE_AMD is not set
# CONFIG_X86_ANCIENT_MCE is not set
CONFIG_X86_MCE_THRESHOLD=y
# CONFIG_X86_MCE_INJECT is not set
CONFIG_X86_THERMAL_VECTOR=y
CONFIG_VM86=y
# CONFIG_TOSHIBA is not set
# CONFIG_I8K is not set
# CONFIG_X86_REBOOTFIXUPS is not set
CONFIG_MICROCODE=y
CONFIG_MICROCODE_INTEL=y
# CONFIG_MICROCODE_AMD is not set
CONFIG_MICROCODE_OLD_INTERFACE=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
CONFIG_NOHIGHMEM=y
# CONFIG_HIGHMEM4G is not set
# CONFIG_HIGHMEM64G is not set
# CONFIG_VMSPLIT_3G is not set
CONFIG_VMSPLIT_3G_OPT=y
# CONFIG_VMSPLIT_2G is not set
# CONFIG_VMSPLIT_2G_OPT is not set
# CONFIG_VMSPLIT_1G is not set
CONFIG_PAGE_OFFSET=0xB0000000
# CONFIG_X86_PAE is not set
# CONFIG_ARCH_PHYS_ADDR_T_64BIT is not set
# CONFIG_ARCH_DMA_ADDR_T_64BIT is not set
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ILLEGAL_POINTER_VALUE=0
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_SPARSEMEM_STATIC=y
CONFIG_HAVE_MEMBLOCK=y
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_COMPACTION is not set
# CONFIG_PHYS_ADDR_T_64BIT is not set
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=65536
CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
# CONFIG_MEMORY_FAILURE is not set
# CONFIG_TRANSPARENT_HUGEPAGE is not set
# CONFIG_CLEANCACHE is not set
# CONFIG_X86_CHECK_BIOS_CORRUPTION is not set
CONFIG_X86_RESERVE_LOW=64
# CONFIG_MATH_EMULATION is not set
CONFIG_MTRR=y
CONFIG_MTRR_SANITIZER=y
CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=0
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
CONFIG_X86_PAT=y
CONFIG_ARCH_USES_PG_UNCACHED=y
CONFIG_ARCH_RANDOM=y
# CONFIG_EFI is not set
CONFIG_SECCOMP=y
# CONFIG_CC_STACKPROTECTOR is not set
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_SCHED_HRTICK=y
# CONFIG_KEXEC is not set
CONFIG_PHYSICAL_START=0x1000000
# CONFIG_RELOCATABLE is not set
CONFIG_PHYSICAL_ALIGN=0x1000000
# CONFIG_HOTPLUG_CPU is not set
# CONFIG_COMPAT_VDSO is not set
# CONFIG_CMDLINE_BOOL is not set

#
# Power management and ACPI options
#
# CONFIG_SUSPEND is not set
# CONFIG_PM_RUNTIME is not set
CONFIG_ACPI=y
# CONFIG_ACPI_PROCFS is not set
# CONFIG_ACPI_PROCFS_POWER is not set
# CONFIG_ACPI_EC_DEBUGFS is not set
# CONFIG_ACPI_PROC_EVENT is not set
CONFIG_ACPI_AC=y
CONFIG_ACPI_BATTERY=y
CONFIG_ACPI_BUTTON=y
CONFIG_ACPI_VIDEO=y
CONFIG_ACPI_FAN=y
# CONFIG_ACPI_DOCK is not set
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_PROCESSOR_AGGREGATOR=y
CONFIG_ACPI_THERMAL=y
# CONFIG_ACPI_CUSTOM_DSDT is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
# CONFIG_ACPI_DEBUG is not set
# CONFIG_ACPI_PCI_SLOT is not set
CONFIG_X86_PM_TIMER=y
# CONFIG_ACPI_CONTAINER is not set
# CONFIG_ACPI_SBS is not set
CONFIG_ACPI_HED=y
# CONFIG_ACPI_CUSTOM_METHOD is not set
CONFIG_ACPI_APEI=y
CONFIG_ACPI_APEI_GHES=y
CONFIG_ACPI_APEI_PCIEAER=y
# CONFIG_ACPI_APEI_EINJ is not set
# CONFIG_ACPI_APEI_ERST_DEBUG is not set
# CONFIG_SFI is not set

#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y
CONFIG_INTEL_IDLE=y

#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GOMMCONFIG is not set
CONFIG_PCI_GODIRECT=y
# CONFIG_PCI_GOANY is not set
CONFIG_PCI_DIRECT=y
CONFIG_PCI_DOMAINS=y
# CONFIG_PCI_CNB20LE_QUIRK is not set
CONFIG_PCIEPORTBUS=y
CONFIG_PCIEAER=y
# CONFIG_PCIE_ECRC is not set
# CONFIG_PCIEAER_INJECT is not set
CONFIG_PCIEASPM=y
# CONFIG_PCIEASPM_DEBUG is not set
CONFIG_ARCH_SUPPORTS_MSI=y
CONFIG_PCI_MSI=y
# CONFIG_PCI_DEBUG is not set
# CONFIG_PCI_STUB is not set
CONFIG_HT_IRQ=y
# CONFIG_PCI_IOV is not set
# CONFIG_PCI_PRI is not set
# CONFIG_PCI_PASID is not set
CONFIG_PCI_IOAPIC=y
CONFIG_PCI_LABEL=y
CONFIG_ISA_DMA_API=y
# CONFIG_ISA is not set
# CONFIG_MCA is not set
# CONFIG_SCx200 is not set
# CONFIG_OLPC is not set
# CONFIG_ALIX is not set
# CONFIG_PCCARD is not set
# CONFIG_HOTPLUG_PCI is not set
# CONFIG_RAPIDIO is not set

#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_HAVE_AOUT=y
# CONFIG_BINFMT_AOUT is not set
CONFIG_BINFMT_MISC=y
CONFIG_HAVE_ATOMIC_IOMAP=y
CONFIG_HAVE_TEXT_POKE_SMP=y
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_UNIX=y
# CONFIG_NET_KEY is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
# CONFIG_IP_FIB_TRIE_STATS is not set
CONFIG_IP_MULTIPLE_TABLES=y
# CONFIG_IP_ROUTE_MULTIPATH is not set
CONFIG_IP_ROUTE_VERBOSE=y
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE_DEMUX is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
CONFIG_SYN_COOKIES=y
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
# CONFIG_INET_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
CONFIG_INET_LRO=y
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IPV6 is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
# CONFIG_NETFILTER is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_RDS is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
CONFIG_STP=y
CONFIG_GARP=y
# CONFIG_BRIDGE is not set
# CONFIG_NET_DSA is not set
CONFIG_VLAN_8021Q=y
CONFIG_VLAN_8021Q_GVRP=y
# CONFIG_DECNET is not set
CONFIG_LLC=y
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_PHONET is not set
# CONFIG_IEEE802154 is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set
# CONFIG_BATMAN_ADV is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_XPS=y

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_TCPPROBE is not set
# CONFIG_NET_DROP_MONITOR is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
CONFIG_FIB_RULES=y
# CONFIG_WIRELESS is not set
# CONFIG_WIMAX is not set
CONFIG_RFKILL=y
CONFIG_RFKILL_LEDS=y
CONFIG_RFKILL_INPUT=y
# CONFIG_NET_9P is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set
# CONFIG_NFC is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH=""
CONFIG_DEVTMPFS=y
# CONFIG_DEVTMPFS_MOUNT is not set
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
# CONFIG_CONNECTOR is not set
# CONFIG_MTD is not set
# CONFIG_PARPORT is not set
CONFIG_PNP=y
# CONFIG_PNP_DEBUG_MESSAGES is not set

#
# Protocols
#
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
# CONFIG_BLK_DEV_CRYPTOLOOP is not set

#
# DRBD disabled because PROC_FS, INET or CONNECTOR not selected
#
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_UB is not set
# CONFIG_BLK_DEV_RAM is not set
CONFIG_CDROM_PKTCDVD=m
CONFIG_CDROM_PKTCDVD_BUFFERS=8
# CONFIG_CDROM_PKTCDVD_WCACHE is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_BLK_DEV_HD is not set
# CONFIG_BLK_DEV_RBD is not set
CONFIG_SENSORS_LIS3LV02D=y
CONFIG_MISC_DEVICES=y
# CONFIG_AD525X_DPOT is not set
# CONFIG_IBM_ASM is not set
# CONFIG_PHANTOM is not set
# CONFIG_INTEL_MID_PTI is not set
# CONFIG_SGI_IOC4 is not set
# CONFIG_TIFM_CORE is not set
# CONFIG_ICS932S401 is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_HP_ILO is not set
# CONFIG_APDS9802ALS is not set
# CONFIG_ISL29003 is not set
# CONFIG_ISL29020 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_SENSORS_BH1780 is not set
# CONFIG_SENSORS_BH1770 is not set
# CONFIG_SENSORS_APDS990X is not set
# CONFIG_HMC6352 is not set
# CONFIG_DS1682 is not set
# CONFIG_VMWARE_BALLOON is not set
# CONFIG_BMP085 is not set
# CONFIG_PCH_PHUB is not set
# CONFIG_USB_SWITCH_FSA9480 is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
CONFIG_EEPROM_AT24=m
CONFIG_EEPROM_LEGACY=m
CONFIG_EEPROM_MAX6875=m
CONFIG_EEPROM_93CX6=m
# CONFIG_CB710_CORE is not set

#
# Texas Instruments shared transport line discipline
#
# CONFIG_SENSORS_LIS3_I2C is not set

#
# Altera FPGA firmware download module
#
# CONFIG_ALTERA_STAPL is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
# CONFIG_SCSI_PROC_FS is not set

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
CONFIG_BLK_DEV_SR=y
CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_CHR_DEV_SG=y
# CONFIG_CHR_DEV_SCH is not set
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
# CONFIG_SCSI_LOWLEVEL is not set
# CONFIG_SCSI_DH is not set
# CONFIG_SCSI_OSD_INITIATOR is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_VERBOSE_ERROR=y
CONFIG_ATA_ACPI=y
# CONFIG_SATA_PMP is not set

#
# Controllers with non-SFF native interface
#
CONFIG_SATA_AHCI=y
# CONFIG_SATA_AHCI_PLATFORM is not set
# CONFIG_SATA_INIC162X is not set
# CONFIG_SATA_ACARD_AHCI is not set
# CONFIG_SATA_SIL24 is not set
# CONFIG_ATA_SFF is not set
# CONFIG_MD is not set
# CONFIG_TARGET_CORE is not set
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
# CONFIG_FIREWIRE_NOSY is not set
# CONFIG_I2O is not set
# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
CONFIG_NET_CORE=y
CONFIG_BONDING=m
CONFIG_DUMMY=m
# CONFIG_EQUALIZER is not set
# CONFIG_NET_FC is not set
CONFIG_MII=y
CONFIG_NET_TEAM=m
CONFIG_NET_TEAM_MODE_ROUNDROBIN=m
CONFIG_NET_TEAM_MODE_ACTIVEBACKUP=m
CONFIG_MACVLAN=m
CONFIG_MACVTAP=m
CONFIG_NETCONSOLE=m
CONFIG_NETPOLL=y
# CONFIG_NETPOLL_TRAP is not set
CONFIG_NET_POLL_CONTROLLER=y
CONFIG_TUN=m
CONFIG_VETH=m
# CONFIG_ARCNET is not set

#
# CAIF transport drivers
#
CONFIG_ETHERNET=y
# CONFIG_NET_VENDOR_3COM is not set
# CONFIG_NET_VENDOR_ADAPTEC is not set
# CONFIG_NET_VENDOR_ALTEON is not set
# CONFIG_NET_VENDOR_AMD is not set
# CONFIG_NET_VENDOR_ATHEROS is not set
# CONFIG_NET_VENDOR_BROADCOM is not set
# CONFIG_NET_VENDOR_BROCADE is not set
# CONFIG_NET_VENDOR_CHELSIO is not set
# CONFIG_NET_VENDOR_CISCO is not set
# CONFIG_DNET is not set
# CONFIG_NET_VENDOR_DEC is not set
# CONFIG_NET_VENDOR_DLINK is not set
# CONFIG_NET_VENDOR_EMULEX is not set
# CONFIG_NET_VENDOR_EXAR is not set
# CONFIG_NET_VENDOR_HP is not set
# CONFIG_NET_VENDOR_INTEL is not set
# CONFIG_IP1000 is not set
# CONFIG_JME is not set
CONFIG_NET_VENDOR_MARVELL=y
# CONFIG_SKGE is not set
CONFIG_SKY2=y
# CONFIG_SKY2_DEBUG is not set
# CONFIG_NET_VENDOR_MELLANOX is not set
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_MYRI is not set
# CONFIG_FEALNX is not set
# CONFIG_NET_VENDOR_NATSEMI is not set
# CONFIG_NET_VENDOR_NVIDIA is not set
# CONFIG_NET_VENDOR_OKI is not set
# CONFIG_ETHOC is not set
# CONFIG_NET_PACKET_ENGINE is not set
# CONFIG_NET_VENDOR_QLOGIC is not set
# CONFIG_NET_VENDOR_REALTEK is not set
# CONFIG_NET_VENDOR_RDC is not set
# CONFIG_NET_VENDOR_SEEQ is not set
# CONFIG_NET_VENDOR_SILAN is not set
# CONFIG_NET_VENDOR_SIS is not set
# CONFIG_SFC is not set
# CONFIG_NET_VENDOR_SMSC is not set
# CONFIG_NET_VENDOR_STMICRO is not set
# CONFIG_NET_VENDOR_SUN is not set
# CONFIG_NET_VENDOR_TEHUTI is not set
# CONFIG_NET_VENDOR_TI is not set
# CONFIG_NET_VENDOR_VIA is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_NET_SB1000 is not set
CONFIG_PHYLIB=y

#
# MII PHY device drivers
#
CONFIG_MARVELL_PHY=y
# CONFIG_DAVICOM_PHY is not set
# CONFIG_QSEMI_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_VITESSE_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_ICPLUS_PHY is not set
# CONFIG_REALTEK_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_MICREL_PHY is not set
# CONFIG_FIXED_PHY is not set
# CONFIG_MDIO_BITBANG is not set
CONFIG_PPP=m
CONFIG_PPP_BSDCOMP=m
CONFIG_PPP_DEFLATE=m
# CONFIG_PPP_FILTER is not set
# CONFIG_PPP_MPPE is not set
# CONFIG_PPP_MULTILINK is not set
# CONFIG_PPPOE is not set
# CONFIG_PPP_ASYNC is not set
# CONFIG_PPP_SYNC_TTY is not set
# CONFIG_SLIP is not set
CONFIG_SLHC=m
# CONFIG_TR is not set

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET is not set
# CONFIG_USB_HSO is not set
# CONFIG_USB_IPHETH is not set
# CONFIG_WLAN is not set

#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#
# CONFIG_WAN is not set
# CONFIG_VMXNET3 is not set
# CONFIG_ISDN is not set
# CONFIG_PHONE is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
CONFIG_INPUT_POLLDEV=y
CONFIG_INPUT_SPARSEKMAP=y

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_JOYDEV=y
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ADP5588 is not set
# CONFIG_KEYBOARD_ADP5589 is not set
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_QT1070 is not set
# CONFIG_KEYBOARD_QT2160 is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_TCA6416 is not set
# CONFIG_KEYBOARD_LM8323 is not set
# CONFIG_KEYBOARD_MAX7359 is not set
# CONFIG_KEYBOARD_MCS is not set
# CONFIG_KEYBOARD_MPR121 is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_OPENCORES is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
# CONFIG_MOUSE_PS2_ALPS is not set
# CONFIG_MOUSE_PS2_LOGIPS2PP is not set
CONFIG_MOUSE_PS2_SYNAPTICS=y
# CONFIG_MOUSE_PS2_LIFEBOOK is not set
# CONFIG_MOUSE_PS2_TRACKPOINT is not set
# CONFIG_MOUSE_PS2_ELANTECH is not set
# CONFIG_MOUSE_PS2_SENTELIC is not set
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
# CONFIG_MOUSE_SERIAL is not set
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_BCM5974 is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_MOUSE_SYNAPTICS_I2C is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
CONFIG_INPUT_MISC=y
# CONFIG_INPUT_AD714X is not set
# CONFIG_INPUT_BMA150 is not set
CONFIG_INPUT_PCSPKR=y
# CONFIG_INPUT_MMA8450 is not set
# CONFIG_INPUT_MPU3050 is not set
# CONFIG_INPUT_APANEL is not set
# CONFIG_INPUT_WISTRON_BTNS is not set
# CONFIG_INPUT_ATLAS_BTNS is not set
# CONFIG_INPUT_ATI_REMOTE2 is not set
# CONFIG_INPUT_KEYSPAN_REMOTE is not set
# CONFIG_INPUT_KXTJ9 is not set
# CONFIG_INPUT_POWERMATE is not set
# CONFIG_INPUT_YEALINK is not set
# CONFIG_INPUT_CM109 is not set
# CONFIG_INPUT_UINPUT is not set
# CONFIG_INPUT_PCF8574 is not set
# CONFIG_INPUT_ADXL34X is not set
# CONFIG_INPUT_CMA3000 is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
# CONFIG_SERIO_SERPORT is not set
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_SERIO_ALTERA_PS2 is not set
# CONFIG_SERIO_PS2MULT is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_UNIX98_PTYS=y
CONFIG_DEVPTS_MULTIPLE_INSTANCES=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
# CONFIG_N_GSM is not set
# CONFIG_TRACE_SINK is not set
# CONFIG_DEVKMEM is not set

#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set
CONFIG_FIX_EARLYCON_MEM=y

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MFD_HSU is not set
# CONFIG_SERIAL_JSM is not set
# CONFIG_SERIAL_TIMBERDALE is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_PCH_UART is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
# CONFIG_TTY_PRINTK is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
CONFIG_HW_RANDOM_INTEL=y
# CONFIG_HW_RANDOM_AMD is not set
# CONFIG_HW_RANDOM_GEODE is not set
# CONFIG_HW_RANDOM_VIA is not set
CONFIG_NVRAM=y
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_SONYPI is not set
# CONFIG_MWAVE is not set
# CONFIG_PC8736x_GPIO is not set
# CONFIG_NSC_GPIO is not set
# CONFIG_RAW_DRIVER is not set
CONFIG_HPET=y
CONFIG_HPET_MMAP=y
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
# CONFIG_TELCLOCK is not set
CONFIG_DEVPORT=y
# CONFIG_RAMOOPS is not set
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
# CONFIG_I2C_COMPAT is not set
CONFIG_I2C_CHARDEV=y
# CONFIG_I2C_MUX is not set
CONFIG_I2C_HELPER_AUTO=y
CONFIG_I2C_ALGOBIT=y

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
CONFIG_I2C_I801=m
# CONFIG_I2C_ISCH is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set

#
# ACPI drivers
#
CONFIG_I2C_SCMI=m

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_DESIGNWARE_PCI is not set
# CONFIG_I2C_INTEL_MID is not set
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_PXA_PCI is not set
# CONFIG_I2C_SIMTEC is not set
# CONFIG_I2C_XILINX is not set
# CONFIG_I2C_EG20T is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_STUB is not set
# CONFIG_SCx200_ACB is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_SPI is not set

#
# PPS support
#
# CONFIG_PPS is not set

#
# PPS generators support
#

#
# PTP clock support
#

#
# Enable Device Drivers -> PPS to see the PTP clock options.
#
CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
# CONFIG_GPIOLIB is not set
# CONFIG_W1 is not set
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
# CONFIG_PDA_POWER is not set
# CONFIG_TEST_POWER is not set
# CONFIG_BATTERY_DS2780 is not set
# CONFIG_BATTERY_DS2782 is not set
# CONFIG_BATTERY_BQ20Z75 is not set
# CONFIG_BATTERY_BQ27x00 is not set
# CONFIG_BATTERY_MAX17040 is not set
# CONFIG_BATTERY_MAX17042 is not set
# CONFIG_CHARGER_MAX8903 is not set
CONFIG_HWMON=y
# CONFIG_HWMON_VID is not set
# CONFIG_HWMON_DEBUG_CHIP is not set

#
# Native drivers
#
# CONFIG_SENSORS_ABITUGURU is not set
# CONFIG_SENSORS_ABITUGURU3 is not set
# CONFIG_SENSORS_AD7414 is not set
# CONFIG_SENSORS_AD7418 is not set
# CONFIG_SENSORS_ADM1021 is not set
# CONFIG_SENSORS_ADM1025 is not set
# CONFIG_SENSORS_ADM1026 is not set
# CONFIG_SENSORS_ADM1029 is not set
# CONFIG_SENSORS_ADM1031 is not set
# CONFIG_SENSORS_ADM9240 is not set
# CONFIG_SENSORS_ADT7411 is not set
# CONFIG_SENSORS_ADT7462 is not set
# CONFIG_SENSORS_ADT7470 is not set
# CONFIG_SENSORS_ADT7475 is not set
# CONFIG_SENSORS_ASC7621 is not set
# CONFIG_SENSORS_K8TEMP is not set
# CONFIG_SENSORS_K10TEMP is not set
# CONFIG_SENSORS_FAM15H_POWER is not set
# CONFIG_SENSORS_ASB100 is not set
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DS620 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_I5K_AMB is not set
# CONFIG_SENSORS_F71805F is not set
# CONFIG_SENSORS_F71882FG is not set
# CONFIG_SENSORS_F75375S is not set
# CONFIG_SENSORS_FSCHMD is not set
# CONFIG_SENSORS_G760A is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
CONFIG_SENSORS_CORETEMP=y
# CONFIG_SENSORS_IT87 is not set
# CONFIG_SENSORS_JC42 is not set
# CONFIG_SENSORS_LINEAGE is not set
# CONFIG_SENSORS_LM63 is not set
# CONFIG_SENSORS_LM73 is not set
# CONFIG_SENSORS_LM75 is not set
# CONFIG_SENSORS_LM77 is not set
# CONFIG_SENSORS_LM78 is not set
# CONFIG_SENSORS_LM80 is not set
# CONFIG_SENSORS_LM83 is not set
# CONFIG_SENSORS_LM85 is not set
# CONFIG_SENSORS_LM87 is not set
# CONFIG_SENSORS_LM90 is not set
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
# CONFIG_SENSORS_LTC4151 is not set
# CONFIG_SENSORS_LTC4215 is not set
# CONFIG_SENSORS_LTC4245 is not set
# CONFIG_SENSORS_LTC4261 is not set
# CONFIG_SENSORS_LM95241 is not set
# CONFIG_SENSORS_LM95245 is not set
# CONFIG_SENSORS_MAX16065 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_MAX1668 is not set
# CONFIG_SENSORS_MAX6639 is not set
# CONFIG_SENSORS_MAX6642 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_NTC_THERMISTOR is not set
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_PC87427 is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_PMBUS is not set
# CONFIG_SENSORS_SHT21 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_SMM665 is not set
# CONFIG_SENSORS_DME1737 is not set
# CONFIG_SENSORS_EMC1403 is not set
# CONFIG_SENSORS_EMC2103 is not set
# CONFIG_SENSORS_EMC6W201 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_SENSORS_SMSC47M192 is not set
# CONFIG_SENSORS_SMSC47B397 is not set
# CONFIG_SENSORS_SCH56XX_COMMON is not set
# CONFIG_SENSORS_SCH5627 is not set
# CONFIG_SENSORS_SCH5636 is not set
# CONFIG_SENSORS_ADS1015 is not set
# CONFIG_SENSORS_ADS7828 is not set
# CONFIG_SENSORS_AMC6821 is not set
# CONFIG_SENSORS_THMC50 is not set
# CONFIG_SENSORS_TMP102 is not set
# CONFIG_SENSORS_TMP401 is not set
# CONFIG_SENSORS_TMP421 is not set
# CONFIG_SENSORS_VIA_CPUTEMP is not set
# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_VT1211 is not set
# CONFIG_SENSORS_VT8231 is not set
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83791D is not set
# CONFIG_SENSORS_W83792D is not set
# CONFIG_SENSORS_W83793 is not set
# CONFIG_SENSORS_W83795 is not set
# CONFIG_SENSORS_W83L785TS is not set
# CONFIG_SENSORS_W83L786NG is not set
# CONFIG_SENSORS_W83627HF is not set
# CONFIG_SENSORS_W83627EHF is not set
# CONFIG_SENSORS_APPLESMC is not set

#
# ACPI drivers
#
# CONFIG_SENSORS_ACPI_POWER is not set
# CONFIG_SENSORS_ATK0110 is not set
CONFIG_THERMAL=y
CONFIG_THERMAL_HWMON=y
CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_CORE=y
# CONFIG_WATCHDOG_NOWAYOUT is not set

#
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
# CONFIG_ACQUIRE_WDT is not set
# CONFIG_ADVANTECH_WDT is not set
# CONFIG_ALIM1535_WDT is not set
# CONFIG_ALIM7101_WDT is not set
# CONFIG_F71808E_WDT is not set
# CONFIG_SP5100_TCO is not set
# CONFIG_SC520_WDT is not set
# CONFIG_SBC_FITPC2_WATCHDOG is not set
# CONFIG_EUROTECH_WDT is not set
# CONFIG_IB700_WDT is not set
# CONFIG_IBMASR is not set
# CONFIG_WAFER_WDT is not set
# CONFIG_I6300ESB_WDT is not set
# CONFIG_ITCO_WDT is not set
# CONFIG_IT8712F_WDT is not set
# CONFIG_IT87_WDT is not set
# CONFIG_HP_WATCHDOG is not set
# CONFIG_SC1200_WDT is not set
# CONFIG_PC87413_WDT is not set
# CONFIG_NV_TCO is not set
# CONFIG_60XX_WDT is not set
# CONFIG_SBC8360_WDT is not set
# CONFIG_SBC7240_WDT is not set
# CONFIG_CPU5_WDT is not set
# CONFIG_SMSC_SCH311X_WDT is not set
# CONFIG_SMSC37B787_WDT is not set
# CONFIG_W83627HF_WDT is not set
# CONFIG_W83697HF_WDT is not set
# CONFIG_W83697UG_WDT is not set
# CONFIG_W83877F_WDT is not set
# CONFIG_W83977F_WDT is not set
# CONFIG_MACHZ_WDT is not set
# CONFIG_SBC_EPX_C3_WATCHDOG is not set

#
# PCI-based Watchdog Cards
#
# CONFIG_PCIPCWATCHDOG is not set
# CONFIG_WDTPCI is not set

#
# USB-based Watchdog Cards
#
# CONFIG_USBPCWATCHDOG is not set
CONFIG_SSB_POSSIBLE=y

#
# Sonics Silicon Backplane
#
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y

#
# Broadcom specific AMBA
#
# CONFIG_BCMA is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_CORE is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS6507X is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_MFD_STMPE is not set
# CONFIG_MFD_TC3589X is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_MFD_CS5535 is not set
# CONFIG_LPC_SCH is not set
# CONFIG_MFD_RDC321X is not set
# CONFIG_MFD_JANZ_CMODIO is not set
# CONFIG_MFD_VX855 is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_REGULATOR is not set
CONFIG_MEDIA_SUPPORT=y

#
# Multimedia core support
#
# CONFIG_MEDIA_CONTROLLER is not set
CONFIG_VIDEO_DEV=y
CONFIG_VIDEO_V4L2_COMMON=y
# CONFIG_DVB_CORE is not set
CONFIG_VIDEO_MEDIA=y

#
# Multimedia drivers
#
# CONFIG_RC_CORE is not set
CONFIG_MEDIA_ATTACH=y
CONFIG_MEDIA_TUNER=y
# CONFIG_MEDIA_TUNER_CUSTOMISE is not set
CONFIG_MEDIA_TUNER_SIMPLE=y
CONFIG_MEDIA_TUNER_TDA8290=y
CONFIG_MEDIA_TUNER_TDA827X=y
CONFIG_MEDIA_TUNER_TDA18271=y
CONFIG_MEDIA_TUNER_TDA9887=y
CONFIG_MEDIA_TUNER_TEA5761=y
CONFIG_MEDIA_TUNER_TEA5767=y
CONFIG_MEDIA_TUNER_MT20XX=y
CONFIG_MEDIA_TUNER_XC2028=y
CONFIG_MEDIA_TUNER_XC5000=y
CONFIG_MEDIA_TUNER_XC4000=y
CONFIG_MEDIA_TUNER_MC44S803=y
CONFIG_VIDEO_V4L2=y
CONFIG_VIDEOBUF_GEN=m
CONFIG_VIDEOBUF_VMALLOC=m
CONFIG_VIDEO_TVEEPROM=m
CONFIG_VIDEO_TUNER=m
CONFIG_VIDEOBUF2_CORE=m
CONFIG_VIDEOBUF2_MEMOPS=m
CONFIG_VIDEOBUF2_VMALLOC=m
CONFIG_VIDEO_CAPTURE_DRIVERS=y
# CONFIG_VIDEO_ADV_DEBUG is not set
# CONFIG_VIDEO_FIXED_MINOR_RANGES is not set
CONFIG_VIDEO_HELPER_CHIPS_AUTO=y

#
# Audio decoders, processors and mixers
#
CONFIG_VIDEO_MSP3400=m

#
# RDS decoders
#

#
# Video decoders
#
CONFIG_VIDEO_SAA711X=m
CONFIG_VIDEO_TVP5150=m

#
# Video and audio decoders
#

#
# MPEG video encoders
#

#
# Video encoders
#

#
# Camera sensor devices
#
CONFIG_VIDEO_MT9V011=m

#
# Flash devices
#

#
# Video improvement chips
#

#
# Miscelaneous helper chips
#
CONFIG_VIDEO_VIVI=m
# CONFIG_VIDEO_CPIA2 is not set
# CONFIG_VIDEO_ZORAN is not set
# CONFIG_VIDEO_SAA7134 is not set
# CONFIG_VIDEO_MXB is not set
# CONFIG_VIDEO_HEXIUM_ORION is not set
# CONFIG_VIDEO_HEXIUM_GEMINI is not set
# CONFIG_VIDEO_CAFE_CCIC is not set
# CONFIG_SOC_CAMERA is not set
CONFIG_V4L_USB_DRIVERS=y
CONFIG_USB_VIDEO_CLASS=y
CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
# CONFIG_USB_GSPCA is not set
# CONFIG_VIDEO_PVRUSB2 is not set
# CONFIG_VIDEO_HDPVR is not set
CONFIG_VIDEO_EM28XX=m
# CONFIG_VIDEO_EM28XX_ALSA is not set
# CONFIG_VIDEO_USBVISION is not set
# CONFIG_USB_ET61X251 is not set
# CONFIG_USB_SN9C102 is not set
# CONFIG_USB_PWC is not set
# CONFIG_USB_ZR364XX is not set
# CONFIG_USB_STKWEBCAM is not set
# CONFIG_USB_S2255 is not set
# CONFIG_V4L_MEM2MEM_DRIVERS is not set
# CONFIG_RADIO_ADAPTERS is not set

#
# Graphics support
#
CONFIG_AGP=y
# CONFIG_AGP_ALI is not set
# CONFIG_AGP_ATI is not set
# CONFIG_AGP_AMD is not set
CONFIG_AGP_INTEL=y
# CONFIG_AGP_NVIDIA is not set
# CONFIG_AGP_SIS is not set
# CONFIG_AGP_SWORKS is not set
# CONFIG_AGP_VIA is not set
# CONFIG_AGP_EFFICEON is not set
# CONFIG_VGA_ARB is not set
# CONFIG_VGA_SWITCHEROO is not set
CONFIG_DRM=y
CONFIG_DRM_KMS_HELPER=y
# CONFIG_DRM_TDFX is not set
# CONFIG_DRM_R128 is not set
# CONFIG_DRM_RADEON is not set
CONFIG_DRM_I915=y
CONFIG_DRM_I915_KMS=y
# CONFIG_DRM_MGA is not set
# CONFIG_DRM_SIS is not set
# CONFIG_DRM_VIA is not set
# CONFIG_DRM_SAVAGE is not set
# CONFIG_DRM_VMWGFX is not set
# CONFIG_STUB_POULSBO is not set
# CONFIG_VGASTATE is not set
CONFIG_VIDEO_OUTPUT_CONTROL=y
CONFIG_FB=y
CONFIG_FIRMWARE_EDID=y
# CONFIG_FB_DDC is not set
# CONFIG_FB_BOOT_VESA_SUPPORT is not set
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
# CONFIG_FB_SYS_FILLRECT is not set
# CONFIG_FB_SYS_COPYAREA is not set
# CONFIG_FB_SYS_IMAGEBLIT is not set
# CONFIG_FB_FOREIGN_ENDIAN is not set
# CONFIG_FB_SYS_FOPS is not set
# CONFIG_FB_WMT_GE_ROPS is not set
# CONFIG_FB_SVGALIB is not set
# CONFIG_FB_MACMODES is not set
# CONFIG_FB_BACKLIGHT is not set
CONFIG_FB_MODE_HELPERS=y
# CONFIG_FB_TILEBLITTING is not set

#
# Frame buffer hardware drivers
#
# CONFIG_FB_CIRRUS is not set
# CONFIG_FB_PM2 is not set
# CONFIG_FB_CYBER2000 is not set
# CONFIG_FB_ARC is not set
# CONFIG_FB_ASILIANT is not set
# CONFIG_FB_IMSTT is not set
# CONFIG_FB_VGA16 is not set
# CONFIG_FB_VESA is not set
# CONFIG_FB_N411 is not set
# CONFIG_FB_HGA is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_NVIDIA is not set
# CONFIG_FB_RIVA is not set
# CONFIG_FB_I810 is not set
# CONFIG_FB_LE80578 is not set
# CONFIG_FB_MATROX is not set
# CONFIG_FB_RADEON is not set
# CONFIG_FB_ATY128 is not set
# CONFIG_FB_ATY is not set
# CONFIG_FB_S3 is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_VIA is not set
# CONFIG_FB_NEOMAGIC is not set
# CONFIG_FB_KYRO is not set
# CONFIG_FB_3DFX is not set
# CONFIG_FB_VOODOO1 is not set
# CONFIG_FB_VT8623 is not set
# CONFIG_FB_TRIDENT is not set
# CONFIG_FB_ARK is not set
# CONFIG_FB_PM3 is not set
# CONFIG_FB_CARMINE is not set
# CONFIG_FB_GEODE is not set
# CONFIG_FB_SMSCUFX is not set
# CONFIG_FB_UDL is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_FB_METRONOME is not set
# CONFIG_FB_MB862XX is not set
# CONFIG_FB_BROADSHEET is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
# CONFIG_BACKLIGHT_GENERIC is not set
# CONFIG_BACKLIGHT_PROGEAR is not set
# CONFIG_BACKLIGHT_APPLE is not set
# CONFIG_BACKLIGHT_SAHARA is not set
# CONFIG_BACKLIGHT_ADP8860 is not set
# CONFIG_BACKLIGHT_ADP8870 is not set

#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
# CONFIG_VGACON_SOFT_SCROLLBACK is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
CONFIG_LOGO_LINUX_CLUT224=y
CONFIG_SOUND=y
# CONFIG_SOUND_OSS_CORE is not set
CONFIG_SND=y
CONFIG_SND_TIMER=y
CONFIG_SND_PCM=y
# CONFIG_SND_SEQUENCER is not set
# CONFIG_SND_MIXER_OSS is not set
# CONFIG_SND_PCM_OSS is not set
CONFIG_SND_HRTIMER=y
CONFIG_SND_DYNAMIC_MINORS=y
# CONFIG_SND_SUPPORT_OLD_API is not set
# CONFIG_SND_VERBOSE_PROCFS is not set
# CONFIG_SND_VERBOSE_PRINTK is not set
# CONFIG_SND_DEBUG is not set
CONFIG_SND_VMASTER=y
CONFIG_SND_DMA_SGBUF=y
# CONFIG_SND_RAWMIDI_SEQ is not set
# CONFIG_SND_OPL3_LIB_SEQ is not set
# CONFIG_SND_OPL4_LIB_SEQ is not set
# CONFIG_SND_SBAWE_SEQ is not set
# CONFIG_SND_EMU10K1_SEQ is not set
# CONFIG_SND_DRIVERS is not set
CONFIG_SND_PCI=y
# CONFIG_SND_AD1889 is not set
# CONFIG_SND_ALS300 is not set
# CONFIG_SND_ALS4000 is not set
# CONFIG_SND_ALI5451 is not set
# CONFIG_SND_ASIHPI is not set
# CONFIG_SND_ATIIXP is not set
# CONFIG_SND_ATIIXP_MODEM is not set
# CONFIG_SND_AU8810 is not set
# CONFIG_SND_AU8820 is not set
# CONFIG_SND_AU8830 is not set
# CONFIG_SND_AW2 is not set
# CONFIG_SND_AZT3328 is not set
# CONFIG_SND_BT87X is not set
# CONFIG_SND_CA0106 is not set
# CONFIG_SND_CMIPCI is not set
# CONFIG_SND_OXYGEN is not set
# CONFIG_SND_CS4281 is not set
# CONFIG_SND_CS46XX is not set
# CONFIG_SND_CS5530 is not set
# CONFIG_SND_CS5535AUDIO is not set
# CONFIG_SND_CTXFI is not set
# CONFIG_SND_DARLA20 is not set
# CONFIG_SND_GINA20 is not set
# CONFIG_SND_LAYLA20 is not set
# CONFIG_SND_DARLA24 is not set
# CONFIG_SND_GINA24 is not set
# CONFIG_SND_LAYLA24 is not set
# CONFIG_SND_MONA is not set
# CONFIG_SND_MIA is not set
# CONFIG_SND_ECHO3G is not set
# CONFIG_SND_INDIGO is not set
# CONFIG_SND_INDIGOIO is not set
# CONFIG_SND_INDIGODJ is not set
# CONFIG_SND_INDIGOIOX is not set
# CONFIG_SND_INDIGODJX is not set
# CONFIG_SND_EMU10K1 is not set
# CONFIG_SND_EMU10K1X is not set
# CONFIG_SND_ENS1370 is not set
# CONFIG_SND_ENS1371 is not set
# CONFIG_SND_ES1938 is not set
# CONFIG_SND_ES1968 is not set
# CONFIG_SND_FM801 is not set
CONFIG_SND_HDA_INTEL=y
CONFIG_SND_HDA_PREALLOC_SIZE=64
# CONFIG_SND_HDA_HWDEP is not set
# CONFIG_SND_HDA_INPUT_BEEP is not set
# CONFIG_SND_HDA_INPUT_JACK is not set
# CONFIG_SND_HDA_PATCH_LOADER is not set
# CONFIG_SND_HDA_CODEC_REALTEK is not set
# CONFIG_SND_HDA_CODEC_ANALOG is not set
CONFIG_SND_HDA_CODEC_SIGMATEL=y
# CONFIG_SND_HDA_CODEC_VIA is not set
# CONFIG_SND_HDA_CODEC_HDMI is not set
# CONFIG_SND_HDA_CODEC_CIRRUS is not set
# CONFIG_SND_HDA_CODEC_CONEXANT is not set
# CONFIG_SND_HDA_CODEC_CA0110 is not set
# CONFIG_SND_HDA_CODEC_CA0132 is not set
# CONFIG_SND_HDA_CODEC_CMEDIA is not set
# CONFIG_SND_HDA_CODEC_SI3054 is not set
# CONFIG_SND_HDA_GENERIC is not set
# CONFIG_SND_HDSP is not set
# CONFIG_SND_HDSPM is not set
# CONFIG_SND_ICE1712 is not set
# CONFIG_SND_ICE1724 is not set
# CONFIG_SND_INTEL8X0 is not set
# CONFIG_SND_INTEL8X0M is not set
# CONFIG_SND_KORG1212 is not set
# CONFIG_SND_LOLA is not set
# CONFIG_SND_LX6464ES is not set
# CONFIG_SND_MAESTRO3 is not set
# CONFIG_SND_MIXART is not set
# CONFIG_SND_NM256 is not set
# CONFIG_SND_PCXHR is not set
# CONFIG_SND_RIPTIDE is not set
# CONFIG_SND_RME32 is not set
# CONFIG_SND_RME96 is not set
# CONFIG_SND_RME9652 is not set
# CONFIG_SND_SIS7019 is not set
# CONFIG_SND_SONICVIBES is not set
# CONFIG_SND_TRIDENT is not set
# CONFIG_SND_VIA82XX is not set
# CONFIG_SND_VIA82XX_MODEM is not set
# CONFIG_SND_VIRTUOSO is not set
# CONFIG_SND_VX222 is not set
# CONFIG_SND_YMFPCI is not set
# CONFIG_SND_USB is not set
# CONFIG_SND_SOC is not set
# CONFIG_SOUND_PRIME is not set
CONFIG_HID_SUPPORT=y
CONFIG_HID=y
CONFIG_HIDRAW=y

#
# USB Input Devices
#
CONFIG_USB_HID=y
# CONFIG_HID_PID is not set
CONFIG_USB_HIDDEV=y

#
# Special HID drivers
#
# CONFIG_HID_A4TECH is not set
# CONFIG_HID_ACRUX is not set
# CONFIG_HID_APPLE is not set
# CONFIG_HID_BELKIN is not set
# CONFIG_HID_CHERRY is not set
# CONFIG_HID_CHICONY is not set
# CONFIG_HID_PRODIKEYS is not set
# CONFIG_HID_CYPRESS is not set
# CONFIG_HID_DRAGONRISE is not set
# CONFIG_HID_EMS_FF is not set
# CONFIG_HID_EZKEY is not set
# CONFIG_HID_HOLTEK is not set
# CONFIG_HID_KEYTOUCH is not set
# CONFIG_HID_KYE is not set
# CONFIG_HID_UCLOGIC is not set
# CONFIG_HID_WALTOP is not set
# CONFIG_HID_GYRATION is not set
# CONFIG_HID_TWINHAN is not set
# CONFIG_HID_KENSINGTON is not set
# CONFIG_HID_LCPOWER is not set
# CONFIG_HID_LOGITECH is not set
# CONFIG_HID_MICROSOFT is not set
# CONFIG_HID_MONTEREY is not set
# CONFIG_HID_MULTITOUCH is not set
# CONFIG_HID_NTRIG is not set
# CONFIG_HID_ORTEK is not set
# CONFIG_HID_PANTHERLORD is not set
# CONFIG_HID_PETALYNX is not set
# CONFIG_HID_PICOLCD is not set
# CONFIG_HID_PRIMAX is not set
# CONFIG_HID_QUANTA is not set
# CONFIG_HID_ROCCAT is not set
# CONFIG_HID_SAMSUNG is not set
# CONFIG_HID_SONY is not set
# CONFIG_HID_SPEEDLINK is not set
# CONFIG_HID_SUNPLUS is not set
# CONFIG_HID_GREENASIA is not set
# CONFIG_HID_SMARTJOYPLUS is not set
# CONFIG_HID_TOPSEED is not set
# CONFIG_HID_THRUSTMASTER is not set
# CONFIG_HID_ZEROPLUS is not set
# CONFIG_HID_ZYDACRON is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_COMMON=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB_ARCH_HAS_XHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
# CONFIG_USB_DEVICEFS is not set
# CONFIG_USB_DEVICE_CLASS is not set
CONFIG_USB_DYNAMIC_MINORS=y
# CONFIG_USB_OTG_WHITELIST is not set
# CONFIG_USB_OTG_BLACKLIST_HUB is not set
# CONFIG_USB_DWC3 is not set
CONFIG_USB_MON=m
# CONFIG_USB_WUSB is not set
# CONFIG_USB_WUSB_CBAF is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
# CONFIG_USB_XHCI_HCD is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_ISP1760_HCD is not set
# CONFIG_USB_ISP1362_HCD is not set
# CONFIG_USB_OHCI_HCD is not set
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_WHCI_HCD is not set
# CONFIG_USB_HWA_HCD is not set

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
CONFIG_USB_PRINTER=m
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#

#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_REALTEK is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
# CONFIG_USB_UAS is not set
# CONFIG_USB_LIBUSUAL is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB port drivers
#
CONFIG_USB_SERIAL=y
# CONFIG_USB_SERIAL_CONSOLE is not set
# CONFIG_USB_EZUSB is not set
CONFIG_USB_SERIAL_GENERIC=y
# CONFIG_USB_SERIAL_AIRCABLE is not set
# CONFIG_USB_SERIAL_ARK3116 is not set
# CONFIG_USB_SERIAL_BELKIN is not set
# CONFIG_USB_SERIAL_CH341 is not set
# CONFIG_USB_SERIAL_WHITEHEAT is not set
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
# CONFIG_USB_SERIAL_CP210X is not set
# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
# CONFIG_USB_SERIAL_EMPEG is not set
# CONFIG_USB_SERIAL_FTDI_SIO is not set
# CONFIG_USB_SERIAL_FUNSOFT is not set
# CONFIG_USB_SERIAL_VISOR is not set
# CONFIG_USB_SERIAL_IPAQ is not set
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
# CONFIG_USB_SERIAL_GARMIN is not set
# CONFIG_USB_SERIAL_IPW is not set
# CONFIG_USB_SERIAL_IUU is not set
# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KLSI is not set
# CONFIG_USB_SERIAL_KOBIL_SCT is not set
# CONFIG_USB_SERIAL_MCT_U232 is not set
# CONFIG_USB_SERIAL_MOS7720 is not set
# CONFIG_USB_SERIAL_MOS7840 is not set
# CONFIG_USB_SERIAL_MOTOROLA is not set
# CONFIG_USB_SERIAL_NAVMAN is not set
# CONFIG_USB_SERIAL_PL2303 is not set
# CONFIG_USB_SERIAL_OTI6858 is not set
# CONFIG_USB_SERIAL_QCAUX is not set
# CONFIG_USB_SERIAL_QUALCOMM is not set
# CONFIG_USB_SERIAL_SPCP8X5 is not set
# CONFIG_USB_SERIAL_HP4X is not set
# CONFIG_USB_SERIAL_SAFE is not set
# CONFIG_USB_SERIAL_SIEMENS_MPI is not set
# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
# CONFIG_USB_SERIAL_SYMBOL is not set
# CONFIG_USB_SERIAL_TI is not set
# CONFIG_USB_SERIAL_CYBERJACK is not set
# CONFIG_USB_SERIAL_XIRCOM is not set
CONFIG_USB_SERIAL_WWAN=y
CONFIG_USB_SERIAL_OPTION=y
# CONFIG_USB_SERIAL_OMNINET is not set
# CONFIG_USB_SERIAL_OPTICON is not set
# CONFIG_USB_SERIAL_VIVOPAY_SERIAL is not set
# CONFIG_USB_SERIAL_ZIO is not set
# CONFIG_USB_SERIAL_SSU100 is not set
# CONFIG_USB_SERIAL_DEBUG is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_GADGET is not set

#
# OTG and related infrastructure
#
# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_UWB is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y

#
# LED drivers
#
# CONFIG_LEDS_LM3530 is not set
# CONFIG_LEDS_PCA9532 is not set
# CONFIG_LEDS_LP3944 is not set
# CONFIG_LEDS_LP5521 is not set
# CONFIG_LEDS_LP5523 is not set
# CONFIG_LEDS_CLEVO_MAIL is not set
# CONFIG_LEDS_PCA955X is not set
# CONFIG_LEDS_BD2802 is not set
# CONFIG_LEDS_INTEL_SS4200 is not set
# CONFIG_LEDS_DELL_NETBOOKS is not set
CONFIG_LEDS_TRIGGERS=y

#
# LED Triggers
#
# CONFIG_LEDS_TRIGGER_TIMER is not set
# CONFIG_LEDS_TRIGGER_HEARTBEAT is not set
# CONFIG_LEDS_TRIGGER_BACKLIGHT is not set
# CONFIG_LEDS_TRIGGER_DEFAULT_ON is not set

#
# iptables trigger is under Netfilter config (LED target)
#
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
# CONFIG_EDAC is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_DS3232 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_ISL12022 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_BQ32K is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8581 is not set
# CONFIG_RTC_DRV_RX8025 is not set
# CONFIG_RTC_DRV_EM3027 is not set
# CONFIG_RTC_DRV_RV3029C2 is not set

#
# SPI RTC drivers
#

#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_MSM6242 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_RP5C01 is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# on-CPU RTC drivers
#
# CONFIG_DMADEVICES is not set
# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set

#
# Virtio drivers
#
# CONFIG_VIRTIO_PCI is not set
# CONFIG_VIRTIO_BALLOON is not set
# CONFIG_VIRTIO_MMIO is not set
# CONFIG_STAGING is not set
CONFIG_X86_PLATFORM_DEVICES=y
# CONFIG_ACER_WMI is not set
# CONFIG_ACERHDF is not set
# CONFIG_ASUS_LAPTOP is not set
# CONFIG_DELL_WMI is not set
# CONFIG_DELL_WMI_AIO is not set
# CONFIG_FUJITSU_LAPTOP is not set
# CONFIG_TC1100_WMI is not set
CONFIG_HP_ACCEL=y
CONFIG_HP_WMI=y
# CONFIG_MSI_LAPTOP is not set
# CONFIG_PANASONIC_LAPTOP is not set
# CONFIG_COMPAL_LAPTOP is not set
# CONFIG_SONY_LAPTOP is not set
# CONFIG_IDEAPAD_LAPTOP is not set
# CONFIG_THINKPAD_ACPI is not set
# CONFIG_SENSORS_HDAPS is not set
# CONFIG_INTEL_MENLOW is not set
CONFIG_ACPI_WMI=y
# CONFIG_MSI_WMI is not set
# CONFIG_ACPI_ASUS is not set
# CONFIG_TOPSTAR_LAPTOP is not set
# CONFIG_ACPI_TOSHIBA is not set
# CONFIG_TOSHIBA_BT_RFKILL is not set
# CONFIG_ACPI_CMPC is not set
# CONFIG_INTEL_IPS is not set
# CONFIG_IBM_RTL is not set
# CONFIG_XO15_EBOOK is not set
# CONFIG_SAMSUNG_LAPTOP is not set
# CONFIG_MXM_WMI is not set
# CONFIG_INTEL_OAKTRAIL is not set
# CONFIG_SAMSUNG_Q10 is not set

#
# Hardware Spinlock drivers
#
CONFIG_CLKSRC_I8253=y
CONFIG_CLKEVT_I8253=y
CONFIG_I8253_LOCK=y
CONFIG_CLKBLD_I8253=y
# CONFIG_IOMMU_SUPPORT is not set
# CONFIG_VIRT_DRIVERS is not set
# CONFIG_HYPERV is not set
# CONFIG_PM_DEVFREQ is not set

#
# Firmware Drivers
#
# CONFIG_EDD is not set
CONFIG_FIRMWARE_MEMMAP=y
# CONFIG_DELL_RBU is not set
# CONFIG_DCDBAS is not set
CONFIG_DMIID=y
CONFIG_DMI_SYSFS=y
# CONFIG_ISCSI_IBFT_FIND is not set
# CONFIG_SIGMA is not set
# CONFIG_GOOGLE_FIRMWARE is not set

#
# File systems
#
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
# CONFIG_EXT3_FS_XATTR is not set
# CONFIG_EXT4_FS is not set
CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
# CONFIG_FS_POSIX_ACL is not set
CONFIG_FILE_LOCKING=y
CONFIG_FSNOTIFY=y
# CONFIG_DNOTIFY is not set
CONFIG_INOTIFY_USER=y
# CONFIG_FANOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_QUOTACTL is not set
# CONFIG_AUTOFS4_FS is not set
CONFIG_FUSE_FS=y
# CONFIG_CUSE is not set

#
# Caches
#
# CONFIG_FSCACHE is not set

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=y
CONFIG_UDF_NLS=y

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
# CONFIG_MSDOS_FS is not set
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=866
CONFIG_FAT_DEFAULT_IOCHARSET="utf8"
CONFIG_NTFS_FS=y
# CONFIG_NTFS_DEBUG is not set
CONFIG_NTFS_RW=y

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_TMPFS_XATTR is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
# CONFIG_CONFIGFS_FS is not set
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_LOGFS is not set
# CONFIG_CRAMFS is not set
CONFIG_SQUASHFS=y
# CONFIG_SQUASHFS_XATTR is not set
CONFIG_SQUASHFS_ZLIB=y
CONFIG_SQUASHFS_LZO=y
# CONFIG_SQUASHFS_XZ is not set
# CONFIG_SQUASHFS_4K_DEVBLK_SIZE is not set
# CONFIG_SQUASHFS_EMBEDDED is not set
CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
CONFIG_PSTORE=y
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_NETWORK_FILESYSTEMS is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="utf8"
# CONFIG_NLS_CODEPAGE_437 is not set
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
CONFIG_NLS_CODEPAGE_866=y
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
CONFIG_NLS_CODEPAGE_1251=y
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
CONFIG_NLS_ISO8859_5=y
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
CONFIG_NLS_KOI8_R=y
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=y

#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_PRINTK_TIME=y
CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_FRAME_WARN=1024
CONFIG_MAGIC_SYSRQ=y
CONFIG_STRIP_ASM_SYMS=y
# CONFIG_UNUSED_SYMBOLS is not set
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
# CONFIG_LOCKUP_DETECTOR is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_SCHED_DEBUG is not set
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_SLUB_STATS is not set
# CONFIG_DEBUG_KMEMLEAK is not set
# CONFIG_DEBUG_PREEMPT is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_SPARSE_RCU_POINTER is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_ATOMIC_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
CONFIG_STACKTRACE=y
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_DEBUG_INFO is not set
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_VIRTUAL is not set
# CONFIG_DEBUG_WRITECOUNT is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
# CONFIG_DEBUG_LIST is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set
CONFIG_ARCH_WANT_FRAME_POINTERS=y
# CONFIG_FRAME_POINTER is not set
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=60
# CONFIG_RCU_CPU_STALL_VERBOSE is not set
# CONFIG_KPROBES_SANITY_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# CONFIG_DEBUG_PER_CPU_MAPS is not set
# CONFIG_LKDTM is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
CONFIG_SYSCTL_SYSCALL_CHECK=y
# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_USER_STACKTRACE_SUPPORT=y
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST=y
CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_RING_BUFFER=y
CONFIG_EVENT_TRACING=y
CONFIG_EVENT_POWER_TRACING_DEPRECATED=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_TRACING=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
# CONFIG_FUNCTION_TRACER is not set
# CONFIG_IRQSOFF_TRACER is not set
# CONFIG_PREEMPT_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_ENABLE_DEFAULT_TRACERS is not set
# CONFIG_FTRACE_SYSCALLS is not set
CONFIG_BRANCH_PROFILE_NONE=y
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set
# CONFIG_PROFILE_ALL_BRANCHES is not set
# CONFIG_STACK_TRACER is not set
# CONFIG_BLK_DEV_IO_TRACE is not set
CONFIG_KPROBE_EVENT=y
# CONFIG_MMIOTRACE is not set
# CONFIG_RING_BUFFER_BENCHMARK is not set
# CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_DMA_API_DEBUG is not set
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_HAVE_ARCH_KMEMCHECK=y
# CONFIG_TEST_KSTRTOX is not set
CONFIG_STRICT_DEVMEM=y
CONFIG_X86_VERBOSE_BOOTUP=y
CONFIG_EARLY_PRINTK=y
# CONFIG_EARLY_PRINTK_DBGP is not set
# CONFIG_DEBUG_STACKOVERFLOW is not set
# CONFIG_X86_PTDUMP is not set
CONFIG_DEBUG_RODATA=y
# CONFIG_DEBUG_RODATA_TEST is not set
# CONFIG_DEBUG_SET_MODULE_RONX is not set
# CONFIG_DEBUG_NX_TEST is not set
CONFIG_DOUBLEFAULT=y
# CONFIG_IOMMU_STRESS is not set
CONFIG_HAVE_MMIOTRACE_SUPPORT=y
# CONFIG_X86_DECODER_SELFTEST is not set
CONFIG_IO_DELAY_TYPE_0X80=0
CONFIG_IO_DELAY_TYPE_0XED=1
CONFIG_IO_DELAY_TYPE_UDELAY=2
CONFIG_IO_DELAY_TYPE_NONE=3
CONFIG_IO_DELAY_0X80=y
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
# CONFIG_IO_DELAY_NONE is not set
CONFIG_DEFAULT_IO_DELAY_TYPE=0
# CONFIG_DEBUG_BOOT_PARAMS is not set
# CONFIG_CPA_DEBUG is not set
CONFIG_OPTIMIZE_INLINING=y
# CONFIG_DEBUG_STRICT_USER_COPY_CHECKS is not set

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_DEFAULT_SECURITY=""
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
# CONFIG_CRYPTO_MANAGER is not set
# CONFIG_CRYPTO_MANAGER2 is not set
# CONFIG_CRYPTO_USER is not set
# CONFIG_CRYPTO_GF128MUL is not set
# CONFIG_CRYPTO_NULL is not set
# CONFIG_CRYPTO_PCRYPT is not set
# CONFIG_CRYPTO_CRYPTD is not set
# CONFIG_CRYPTO_AUTHENC is not set
# CONFIG_CRYPTO_TEST is not set

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set

#
# Block modes
#
# CONFIG_CRYPTO_CBC is not set
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
# CONFIG_CRYPTO_ECB is not set
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_PCBC is not set
# CONFIG_CRYPTO_XTS is not set

#
# Hash modes
#
# CONFIG_CRYPTO_HMAC is not set
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_VMAC is not set

#
# Digest
#
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_CRC32C_INTEL is not set
# CONFIG_CRYPTO_GHASH is not set
# CONFIG_CRYPTO_MD4 is not set
# CONFIG_CRYPTO_MD5 is not set
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
# CONFIG_CRYPTO_SHA1 is not set
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_WP512 is not set

#
# Ciphers
#
# CONFIG_CRYPTO_AES is not set
# CONFIG_CRYPTO_AES_586 is not set
# CONFIG_CRYPTO_AES_NI_INTEL is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_ARC4 is not set
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
# CONFIG_CRYPTO_DES is not set
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SALSA20_586 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_TEA is not set
# CONFIG_CRYPTO_TWOFISH is not set
# CONFIG_CRYPTO_TWOFISH_586 is not set

#
# Compression
#
# CONFIG_CRYPTO_DEFLATE is not set
# CONFIG_CRYPTO_ZLIB is not set
# CONFIG_CRYPTO_LZO is not set

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_USER_API_HASH is not set
# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
# CONFIG_CRYPTO_HW is not set
CONFIG_HAVE_KVM=y
# CONFIG_VIRTUALIZATION is not set
CONFIG_BINARY_PRINTF=y

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
# CONFIG_CRC_T10DIF is not set
CONFIG_CRC_ITU_T=y
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
# CONFIG_CRC8 is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=m
CONFIG_LZO_DECOMPRESS=y
# CONFIG_XZ_DEC is not set
# CONFIG_XZ_DEC_BCJ is not set
CONFIG_GENERIC_ALLOCATOR=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_CHECK_SIGNATURE=y
CONFIG_CPU_RMAP=y
CONFIG_NLATTR=y
# CONFIG_AVERAGE is not set
# CONFIG_CORDIC is not set

Re: [PATCH 0/2] net: Add network priority cgroup (v4)

[Neil Horman]

On Wed, Nov 23, 2011 at 02:19:34PM +0400, Kirill Smelkov wrote:
> On Tue, Nov 22, 2011 at 04:00:08PM -0500, Neil Horman wrote:
> > On Tue, Nov 22, 2011 at 03:45:16PM -0500, David Miller wrote:
> > > From: Neil Horman <nhorman@tuxdriver.com>
> > > Date: Tue, 22 Nov 2011 15:39:38 -0500
> > > 
> > > > On Tue, Nov 22, 2011 at 03:23:15PM -0500, David Miller wrote:
> > > >> From: Neil Horman <nhorman@tuxdriver.com>
> > > >> Date: Tue, 22 Nov 2011 10:10:50 -0500
> > > >> 
> > > >> > (v2)
> > > >> > Based on reviews from John F., Amerigo Wang and Neerav Parikh, I've cleaned up
> > > >> > the rcu locking, fixed a memory leak in an error path, and corrected some typos.
> > > >> > 
> > > >> > (v3)
> > > >> > Converted rcu_dereference to rntl_dereference where appropriate as per request
> > > >> > from John F.
> > > >> > 
> > > >> > (v4)
> > > >> > Cleaned up some spacing issues, and optimized the skb_update_priority path as
> > > >> > per request from Dave M.
> > > >> > 
> > > >> > 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>
> > > >> 
> > > >> Applied and going through some build testing now, thanks Neil.
> > > > Thanks Dave!  I tested here building separately with:
> > > > CONFIG_CGROUPS=n
> > > > CONFIG_CROUPS=y && CONFIG_NETPRIO_CGROUP=y
> > > > CONFIG_CROUPS=y && CONFIG_NETPRIO_CGROUP=m
> > > > 
> > > > So you should be square, but theres rarely any valid accounting for my ability
> > > > to screw something up :)
> > > 
> > > I want to be absolutely sure, because I had to apply your changes by hand,
> > > in particular the linux/netdevice.h changes had line offsets of up to 67.
> > Really?  Thats odd, I've got thse changes here applied to a local copy of the
> > net-next tree.  I branched from commit 8b3408f8ee994973869d8ba32c5bf482bc4ddca4
> > and it applies cleanly.  Perhaps something wen't in while I was developing this?
> 
> The patch broke the build with CONFIG_CGROUPS=n (testing on today's
> net-next v3.2-rc2-714-g1f2149c):
> 
> kirr@mini:~/src/linux/linux-net-next$ make
>   CHK     include/linux/version.h
>   CHK     include/generated/utsrelease.h
>   CALL    scripts/checksyscalls.sh
>   CHK     include/generated/compile.h
>   CC      init/do_mounts.o
> In file included from include/linux/netdevice.h:53,
>                  from include/linux/icmpv6.h:173,
>                  from include/linux/ipv6.h:220,
>                  from include/net/ipv6.h:16,
>                  from include/linux/sunrpc/clnt.h:26,
>                  from include/linux/nfs_fs.h:50,
>                  from init/do_mounts.c:20:
> include/net/netprio_cgroup.h:23: error: field ‘css’ has incomplete type
> scripts/Makefile.build:305: recipe for target `init/do_mounts.o' failed
> make[1]: *** [init/do_mounts.o] Error 1
> Makefile:945: recipe for target `init' failed
> make: *** [init] Error 2
> 
> 
> Config attached.
> 
Damn, I apologize.  I had tested with CGROUP_CONFIG=n, but when I did a make
oldconfig, since I had cgroup subsystems enabled, it re-selected CGROUP_CONFIG,
instead of squashing the subsystems.  I'll fix this immediately.  
Neil