[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / openvswitch / vport.c

/*
 * Copyright (c) 2007-2012 Nicira, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 */

#include <linux/etherdevice.h>
#include <linux/if.h>
#include <linux/if_vlan.h>
#include <linux/jhash.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/percpu.h>
#include <linux/rcupdate.h>
#include <linux/rtnetlink.h>
#include <linux/compat.h>
#include <net/net_namespace.h>

#include "datapath.h"
#include "vport.h"
#include "vport-internal_dev.h"

/* List of statically compiled vport implementations.  Don't forget to also
 * add yours to the list at the bottom of vport.h. */
static const struct vport_ops *vport_ops_list[] = {
	&ovs_netdev_vport_ops,
	&ovs_internal_vport_ops,
};

/* Protected by RCU read lock for reading, ovs_mutex for writing. */
static struct hlist_head *dev_table;
#define VPORT_HASH_BUCKETS 1024

/**
 *	ovs_vport_init - initialize vport subsystem
 *
 * Called at module load time to initialize the vport subsystem.
 */
int ovs_vport_init(void)
{
	dev_table = kzalloc(VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
			    GFP_KERNEL);
	if (!dev_table)
		return -ENOMEM;

	return 0;
}

/**
 *	ovs_vport_exit - shutdown vport subsystem
 *
 * Called at module exit time to shutdown the vport subsystem.
 */
void ovs_vport_exit(void)
{
	kfree(dev_table);
}

static struct hlist_head *hash_bucket(struct net *net, const char *name)
{
	unsigned int hash = jhash(name, strlen(name), (unsigned long) net);
	return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)];
}

/**
 *	ovs_vport_locate - find a port that has already been created
 *
 * @name: name of port to find
 *
 * Must be called with ovs or RCU read lock.
 */
struct vport *ovs_vport_locate(struct net *net, const char *name)
{
	struct hlist_head *bucket = hash_bucket(net, name);
	struct vport *vport;

	hlist_for_each_entry_rcu(vport, bucket, hash_node)
		if (!strcmp(name, vport->ops->get_name(vport)) &&
		    net_eq(ovs_dp_get_net(vport->dp), net))
			return vport;

	return NULL;
}

/**
 *	ovs_vport_alloc - allocate and initialize new vport
 *
 * @priv_size: Size of private data area to allocate.
 * @ops: vport device ops
 *
 * Allocate and initialize a new vport defined by @ops.  The vport will contain
 * a private data area of size @priv_size that can be accessed using
 * vport_priv().  vports that are no longer needed should be released with
 * vport_free().
 */
struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
			  const struct vport_parms *parms)
{
	struct vport *vport;
	size_t alloc_size;

	alloc_size = sizeof(struct vport);
	if (priv_size) {
		alloc_size = ALIGN(alloc_size, VPORT_ALIGN);
		alloc_size += priv_size;
	}

	vport = kzalloc(alloc_size, GFP_KERNEL);
	if (!vport)
		return ERR_PTR(-ENOMEM);

	vport->dp = parms->dp;
	vport->port_no = parms->port_no;
	vport->upcall_portid = parms->upcall_portid;
	vport->ops = ops;
	INIT_HLIST_NODE(&vport->dp_hash_node);

	vport->percpu_stats = alloc_percpu(struct pcpu_tstats);
	if (!vport->percpu_stats) {
		kfree(vport);
		return ERR_PTR(-ENOMEM);
	}

	spin_lock_init(&vport->stats_lock);

	return vport;
}

/**
 *	ovs_vport_free - uninitialize and free vport
 *
 * @vport: vport to free
 *
 * Frees a vport allocated with vport_alloc() when it is no longer needed.
 *
 * The caller must ensure that an RCU grace period has passed since the last
 * time @vport was in a datapath.
 */
void ovs_vport_free(struct vport *vport)
{
	free_percpu(vport->percpu_stats);
	kfree(vport);
}

/**
 *	ovs_vport_add - add vport device (for kernel callers)
 *
 * @parms: Information about new vport.
 *
 * Creates a new vport with the specified configuration (which is dependent on
 * device type).  ovs_mutex must be held.
 */
struct vport *ovs_vport_add(const struct vport_parms *parms)
{
	struct vport *vport;
	int err = 0;
	int i;

	for (i = 0; i < ARRAY_SIZE(vport_ops_list); i++) {
		if (vport_ops_list[i]->type == parms->type) {
			struct hlist_head *bucket;

			vport = vport_ops_list[i]->create(parms);
			if (IS_ERR(vport)) {
				err = PTR_ERR(vport);
				goto out;
			}

			bucket = hash_bucket(ovs_dp_get_net(vport->dp),
					     vport->ops->get_name(vport));
			hlist_add_head_rcu(&vport->hash_node, bucket);
			return vport;
		}
	}

	err = -EAFNOSUPPORT;

out:
	return ERR_PTR(err);
}

/**
 *	ovs_vport_set_options - modify existing vport device (for kernel callers)
 *
 * @vport: vport to modify.
 * @port: New configuration.
 *
 * Modifies an existing device with the specified configuration (which is
 * dependent on device type).  ovs_mutex must be held.
 */
int ovs_vport_set_options(struct vport *vport, struct nlattr *options)
{
	if (!vport->ops->set_options)
		return -EOPNOTSUPP;
	return vport->ops->set_options(vport, options);
}

/**
 *	ovs_vport_del - delete existing vport device
 *
 * @vport: vport to delete.
 *
 * Detaches @vport from its datapath and destroys it.  It is possible to fail
 * for reasons such as lack of memory.  ovs_mutex must be held.
 */
void ovs_vport_del(struct vport *vport)
{
	ASSERT_OVSL();

	hlist_del_rcu(&vport->hash_node);

	vport->ops->destroy(vport);
}

/**
 *	ovs_vport_get_stats - retrieve device stats
 *
 * @vport: vport from which to retrieve the stats
 * @stats: location to store stats
 *
 * Retrieves transmit, receive, and error stats for the given device.
 *
 * Must be called with ovs_mutex or rcu_read_lock.
 */
void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
{
	int i;

	memset(stats, 0, sizeof(*stats));

	/* We potentially have 2 sources of stats that need to be combined:
	 * those we have collected (split into err_stats and percpu_stats) from
	 * set_stats() and device error stats from netdev->get_stats() (for
	 * errors that happen  downstream and therefore aren't reported through
	 * our vport_record_error() function).
	 * Stats from first source are reported by ovs (OVS_VPORT_ATTR_STATS).
	 * netdev-stats can be directly read over netlink-ioctl.
	 */

	spin_lock_bh(&vport->stats_lock);

	stats->rx_errors	= vport->err_stats.rx_errors;
	stats->tx_errors	= vport->err_stats.tx_errors;
	stats->tx_dropped	= vport->err_stats.tx_dropped;
	stats->rx_dropped	= vport->err_stats.rx_dropped;

	spin_unlock_bh(&vport->stats_lock);

	for_each_possible_cpu(i) {
		const struct pcpu_tstats *percpu_stats;
		struct pcpu_tstats local_stats;
		unsigned int start;

		percpu_stats = per_cpu_ptr(vport->percpu_stats, i);

		do {
			start = u64_stats_fetch_begin_bh(&percpu_stats->syncp);
			local_stats = *percpu_stats;
		} while (u64_stats_fetch_retry_bh(&percpu_stats->syncp, start));

		stats->rx_bytes		+= local_stats.rx_bytes;
		stats->rx_packets	+= local_stats.rx_packets;
		stats->tx_bytes		+= local_stats.tx_bytes;
		stats->tx_packets	+= local_stats.tx_packets;
	}
}

/**
 *	ovs_vport_get_options - retrieve device options
 *
 * @vport: vport from which to retrieve the options.
 * @skb: sk_buff where options should be appended.
 *
 * Retrieves the configuration of the given device, appending an
 * %OVS_VPORT_ATTR_OPTIONS attribute that in turn contains nested
 * vport-specific attributes to @skb.
 *
 * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room, or another
 * negative error code if a real error occurred.  If an error occurs, @skb is
 * left unmodified.
 *
 * Must be called with ovs_mutex or rcu_read_lock.
 */
int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb)
{
	struct nlattr *nla;
	int err;

	if (!vport->ops->get_options)
		return 0;

	nla = nla_nest_start(skb, OVS_VPORT_ATTR_OPTIONS);
	if (!nla)
		return -EMSGSIZE;

	err = vport->ops->get_options(vport, skb);
	if (err) {
		nla_nest_cancel(skb, nla);
		return err;
	}

	nla_nest_end(skb, nla);
	return 0;
}

/**
 *	ovs_vport_receive - pass up received packet to the datapath for processing
 *
 * @vport: vport that received the packet
 * @skb: skb that was received
 *
 * Must be called with rcu_read_lock.  The packet cannot be shared and
 * skb->data should point to the Ethernet header.
 */
void ovs_vport_receive(struct vport *vport, struct sk_buff *skb)
{
	struct pcpu_tstats *stats;

	stats = this_cpu_ptr(vport->percpu_stats);
	u64_stats_update_begin(&stats->syncp);
	stats->rx_packets++;
	stats->rx_bytes += skb->len;
	u64_stats_update_end(&stats->syncp);

	ovs_dp_process_received_packet(vport, skb);
}

/**
 *	ovs_vport_send - send a packet on a device
 *
 * @vport: vport on which to send the packet
 * @skb: skb to send
 *
 * Sends the given packet and returns the length of data sent.  Either ovs
 * lock or rcu_read_lock must be held.
 */
int ovs_vport_send(struct vport *vport, struct sk_buff *skb)
{
	int sent = vport->ops->send(vport, skb);

	if (likely(sent)) {
		struct pcpu_tstats *stats;

		stats = this_cpu_ptr(vport->percpu_stats);

		u64_stats_update_begin(&stats->syncp);
		stats->tx_packets++;
		stats->tx_bytes += sent;
		u64_stats_update_end(&stats->syncp);
	}
	return sent;
}

/**
 *	ovs_vport_record_error - indicate device error to generic stats layer
 *
 * @vport: vport that encountered the error
 * @err_type: one of enum vport_err_type types to indicate the error type
 *
 * If using the vport generic stats layer indicate that an error of the given
 * type has occured.
 */
void ovs_vport_record_error(struct vport *vport, enum vport_err_type err_type)
{
	spin_lock(&vport->stats_lock);

	switch (err_type) {
	case VPORT_E_RX_DROPPED:
		vport->err_stats.rx_dropped++;
		break;

	case VPORT_E_RX_ERROR:
		vport->err_stats.rx_errors++;
		break;

	case VPORT_E_TX_DROPPED:
		vport->err_stats.tx_dropped++;
		break;

	case VPORT_E_TX_ERROR:
		vport->err_stats.tx_errors++;
		break;
	}

	spin_unlock(&vport->stats_lock);
}
Commit	Line	Data
ccb1352e	1	/*
caf2ee14	2	* Copyright (c) 2007-2012 Nicira, Inc.
ccb1352e JG	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of version 2 of the GNU General Public
	6	* License as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program; if not, write to the Free Software
	15	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	16	* 02110-1301, USA
	17	*/
	18
ccb1352e JG	19	#include <linux/etherdevice.h>
	20	#include <linux/if.h>
	21	#include <linux/if_vlan.h>
46df7b81	22	#include <linux/jhash.h>
ccb1352e JG	23	#include <linux/kernel.h>
	24	#include <linux/list.h>
	25	#include <linux/mutex.h>
	26	#include <linux/percpu.h>
	27	#include <linux/rcupdate.h>
	28	#include <linux/rtnetlink.h>
	29	#include <linux/compat.h>
46df7b81	30	#include <net/net_namespace.h>
ccb1352e	31
46df7b81	32	#include "datapath.h"
ccb1352e JG	33	#include "vport.h"
	34	#include "vport-internal_dev.h"
	35
	36	/* List of statically compiled vport implementations. Don't forget to also
	37	* add yours to the list at the bottom of vport.h. */
	38	static const struct vport_ops *vport_ops_list[] = {
	39	&ovs_netdev_vport_ops,
	40	&ovs_internal_vport_ops,
	41	};
	42
8e4e1713	43	/* Protected by RCU read lock for reading, ovs_mutex for writing. */
ccb1352e JG	44	static struct hlist_head *dev_table;
	45	#define VPORT_HASH_BUCKETS 1024
	46
	47	/**
	48	* ovs_vport_init - initialize vport subsystem
	49	*
	50	* Called at module load time to initialize the vport subsystem.
	51	*/
	52	int ovs_vport_init(void)
	53	{
	54	dev_table = kzalloc(VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
	55	GFP_KERNEL);
	56	if (!dev_table)
	57	return -ENOMEM;
	58
	59	return 0;
	60	}
	61
	62	/**
	63	* ovs_vport_exit - shutdown vport subsystem
	64	*
	65	* Called at module exit time to shutdown the vport subsystem.
	66	*/
	67	void ovs_vport_exit(void)
	68	{
	69	kfree(dev_table);
	70	}
	71
46df7b81	72	static struct hlist_head hash_bucket(struct net net, const char *name)
ccb1352e	73	{
46df7b81	74	unsigned int hash = jhash(name, strlen(name), (unsigned long) net);
ccb1352e JG	75	return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)];
	76	}
	77
	78	/**
	79	* ovs_vport_locate - find a port that has already been created
	80	*
	81	* @name: name of port to find
	82	*
8e4e1713	83	* Must be called with ovs or RCU read lock.
ccb1352e	84	*/
46df7b81	85	struct vport ovs_vport_locate(struct net net, const char *name)
ccb1352e	86	{
46df7b81	87	struct hlist_head *bucket = hash_bucket(net, name);
ccb1352e	88	struct vport *vport;
ccb1352e	89
b67bfe0d	90	hlist_for_each_entry_rcu(vport, bucket, hash_node)
46df7b81 PS	91	if (!strcmp(name, vport->ops->get_name(vport)) &&
46df7b81 PS	92	net_eq(ovs_dp_get_net(vport->dp), net))
ccb1352e JG	93	return vport;
	94
	95	return NULL;
	96	}
	97
	98	/**
	99	* ovs_vport_alloc - allocate and initialize new vport
	100	*
	101	* @priv_size: Size of private data area to allocate.
	102	* @ops: vport device ops
	103	*
	104	* Allocate and initialize a new vport defined by @ops. The vport will contain
	105	* a private data area of size @priv_size that can be accessed using
	106	* vport_priv(). vports that are no longer needed should be released with
	107	* vport_free().
	108	*/
	109	struct vport ovs_vport_alloc(int priv_size, const struct vport_ops ops,
	110	const struct vport_parms *parms)
	111	{
	112	struct vport *vport;
	113	size_t alloc_size;
	114
	115	alloc_size = sizeof(struct vport);
	116	if (priv_size) {
	117	alloc_size = ALIGN(alloc_size, VPORT_ALIGN);
	118	alloc_size += priv_size;
	119	}
	120
	121	vport = kzalloc(alloc_size, GFP_KERNEL);
	122	if (!vport)
	123	return ERR_PTR(-ENOMEM);
	124
	125	vport->dp = parms->dp;
	126	vport->port_no = parms->port_no;
15e47304	127	vport->upcall_portid = parms->upcall_portid;
ccb1352e	128	vport->ops = ops;
15eac2a7	129	INIT_HLIST_NODE(&vport->dp_hash_node);
ccb1352e	130
e0f0ecf3	131	vport->percpu_stats = alloc_percpu(struct pcpu_tstats);
f0a98ae8 DC	132	if (!vport->percpu_stats) {
f0a98ae8 DC	133	kfree(vport);
ccb1352e	134	return ERR_PTR(-ENOMEM);
f0a98ae8	135	}
ccb1352e JG	136
	137	spin_lock_init(&vport->stats_lock);
	138
	139	return vport;
	140	}
	141
	142	/**
	143	* ovs_vport_free - uninitialize and free vport
	144	*
	145	* @vport: vport to free
	146	*
	147	* Frees a vport allocated with vport_alloc() when it is no longer needed.
	148	*
	149	* The caller must ensure that an RCU grace period has passed since the last
	150	* time @vport was in a datapath.
	151	*/
	152	void ovs_vport_free(struct vport *vport)
	153	{
	154	free_percpu(vport->percpu_stats);
	155	kfree(vport);
	156	}
	157
	158	/**
	159	* ovs_vport_add - add vport device (for kernel callers)
	160	*
	161	* @parms: Information about new vport.
	162	*
	163	* Creates a new vport with the specified configuration (which is dependent on
8e4e1713	164	* device type). ovs_mutex must be held.
ccb1352e JG	165	*/
	166	struct vport ovs_vport_add(const struct vport_parms parms)
	167	{
	168	struct vport *vport;
	169	int err = 0;
	170	int i;
	171
ccb1352e JG	172	for (i = 0; i < ARRAY_SIZE(vport_ops_list); i++) {
ccb1352e JG	173	if (vport_ops_list[i]->type == parms->type) {
46df7b81 PS	174	struct hlist_head *bucket;
46df7b81 PS	175
ccb1352e JG	176	vport = vport_ops_list[i]->create(parms);
	177	if (IS_ERR(vport)) {
	178	err = PTR_ERR(vport);
	179	goto out;
	180	}
	181
46df7b81 PS	182	bucket = hash_bucket(ovs_dp_get_net(vport->dp),
	183	vport->ops->get_name(vport));
	184	hlist_add_head_rcu(&vport->hash_node, bucket);
ccb1352e JG	185	return vport;
	186	}
	187	}
	188
	189	err = -EAFNOSUPPORT;
	190
	191	out:
	192	return ERR_PTR(err);
	193	}
	194
	195	/**
	196	* ovs_vport_set_options - modify existing vport device (for kernel callers)
	197	*
	198	* @vport: vport to modify.
	199	* @port: New configuration.
	200	*
	201	* Modifies an existing device with the specified configuration (which is
8e4e1713	202	* dependent on device type). ovs_mutex must be held.
ccb1352e JG	203	*/
	204	int ovs_vport_set_options(struct vport vport, struct nlattr options)
	205	{
ccb1352e JG	206	if (!vport->ops->set_options)
	207	return -EOPNOTSUPP;
	208	return vport->ops->set_options(vport, options);
	209	}
	210
	211	/**
	212	* ovs_vport_del - delete existing vport device
	213	*
	214	* @vport: vport to delete.
	215	*
	216	* Detaches @vport from its datapath and destroys it. It is possible to fail
8e4e1713	217	* for reasons such as lack of memory. ovs_mutex must be held.
ccb1352e JG	218	*/
	219	void ovs_vport_del(struct vport *vport)
	220	{
8e4e1713	221	ASSERT_OVSL();
ccb1352e JG	222
	223	hlist_del_rcu(&vport->hash_node);
	224
	225	vport->ops->destroy(vport);
	226	}
	227
	228	/**
	229	* ovs_vport_get_stats - retrieve device stats
	230	*
	231	* @vport: vport from which to retrieve the stats
	232	* @stats: location to store stats
	233	*
	234	* Retrieves transmit, receive, and error stats for the given device.
	235	*
8e4e1713	236	* Must be called with ovs_mutex or rcu_read_lock.
ccb1352e JG	237	*/
	238	void ovs_vport_get_stats(struct vport vport, struct ovs_vport_stats stats)
	239	{
	240	int i;
	241
	242	memset(stats, 0, sizeof(*stats));
	243
	244	/* We potentially have 2 sources of stats that need to be combined:
	245	* those we have collected (split into err_stats and percpu_stats) from
	246	* set_stats() and device error stats from netdev->get_stats() (for
	247	* errors that happen downstream and therefore aren't reported through
	248	* our vport_record_error() function).
	249	* Stats from first source are reported by ovs (OVS_VPORT_ATTR_STATS).
	250	* netdev-stats can be directly read over netlink-ioctl.
	251	*/
	252
	253	spin_lock_bh(&vport->stats_lock);
	254
	255	stats->rx_errors = vport->err_stats.rx_errors;
	256	stats->tx_errors = vport->err_stats.tx_errors;
	257	stats->tx_dropped = vport->err_stats.tx_dropped;
	258	stats->rx_dropped = vport->err_stats.rx_dropped;
	259
	260	spin_unlock_bh(&vport->stats_lock);
	261
	262	for_each_possible_cpu(i) {
e0f0ecf3 PS	263	const struct pcpu_tstats *percpu_stats;
e0f0ecf3 PS	264	struct pcpu_tstats local_stats;
ccb1352e JG	265	unsigned int start;
	266
	267	percpu_stats = per_cpu_ptr(vport->percpu_stats, i);
	268
	269	do {
e0f0ecf3	270	start = u64_stats_fetch_begin_bh(&percpu_stats->syncp);
ccb1352e	271	local_stats = *percpu_stats;
e0f0ecf3	272	} while (u64_stats_fetch_retry_bh(&percpu_stats->syncp, start));
ccb1352e JG	273
	274	stats->rx_bytes += local_stats.rx_bytes;
	275	stats->rx_packets += local_stats.rx_packets;
	276	stats->tx_bytes += local_stats.tx_bytes;
	277	stats->tx_packets += local_stats.tx_packets;
	278	}
	279	}
	280
	281	/**
	282	* ovs_vport_get_options - retrieve device options
	283	*
	284	* @vport: vport from which to retrieve the options.
	285	* @skb: sk_buff where options should be appended.
	286	*
	287	* Retrieves the configuration of the given device, appending an
	288	* %OVS_VPORT_ATTR_OPTIONS attribute that in turn contains nested
	289	* vport-specific attributes to @skb.
	290	*
	291	* Returns 0 if successful, -EMSGSIZE if @skb has insufficient room, or another
	292	* negative error code if a real error occurred. If an error occurs, @skb is
	293	* left unmodified.
	294	*
8e4e1713	295	* Must be called with ovs_mutex or rcu_read_lock.
ccb1352e JG	296	*/
	297	int ovs_vport_get_options(const struct vport vport, struct sk_buff skb)
	298	{
	299	struct nlattr *nla;
5d963352 TG	300	int err;
	301
	302	if (!vport->ops->get_options)
	303	return 0;
ccb1352e JG	304
	305	nla = nla_nest_start(skb, OVS_VPORT_ATTR_OPTIONS);
	306	if (!nla)
	307	return -EMSGSIZE;
	308
5d963352 TG	309	err = vport->ops->get_options(vport, skb);
	310	if (err) {
	311	nla_nest_cancel(skb, nla);
	312	return err;
ccb1352e JG	313	}
	314
	315	nla_nest_end(skb, nla);
	316	return 0;
	317	}
	318
	319	/**
	320	* ovs_vport_receive - pass up received packet to the datapath for processing
	321	*
	322	* @vport: vport that received the packet
	323	* @skb: skb that was received
	324	*
	325	* Must be called with rcu_read_lock. The packet cannot be shared and
d176ca2a	326	* skb->data should point to the Ethernet header.
ccb1352e JG	327	*/
	328	void ovs_vport_receive(struct vport vport, struct sk_buff skb)
	329	{
e0f0ecf3	330	struct pcpu_tstats *stats;
ccb1352e	331
404f2f10	332	stats = this_cpu_ptr(vport->percpu_stats);
e0f0ecf3	333	u64_stats_update_begin(&stats->syncp);
ccb1352e JG	334	stats->rx_packets++;
ccb1352e JG	335	stats->rx_bytes += skb->len;
e0f0ecf3	336	u64_stats_update_end(&stats->syncp);
ccb1352e JG	337
	338	ovs_dp_process_received_packet(vport, skb);
	339	}
	340
	341	/**
	342	* ovs_vport_send - send a packet on a device
	343	*
	344	* @vport: vport on which to send the packet
	345	* @skb: skb to send
	346	*
8e4e1713	347	* Sends the given packet and returns the length of data sent. Either ovs
ccb1352e JG	348	* lock or rcu_read_lock must be held.
	349	*/
	350	int ovs_vport_send(struct vport vport, struct sk_buff skb)
	351	{
	352	int sent = vport->ops->send(vport, skb);
	353
	354	if (likely(sent)) {
e0f0ecf3	355	struct pcpu_tstats *stats;
ccb1352e	356
404f2f10	357	stats = this_cpu_ptr(vport->percpu_stats);
ccb1352e	358
e0f0ecf3	359	u64_stats_update_begin(&stats->syncp);
ccb1352e JG	360	stats->tx_packets++;
ccb1352e JG	361	stats->tx_bytes += sent;
e0f0ecf3	362	u64_stats_update_end(&stats->syncp);
ccb1352e JG	363	}
	364	return sent;
	365	}
	366
	367	/**
	368	* ovs_vport_record_error - indicate device error to generic stats layer
	369	*
	370	* @vport: vport that encountered the error
	371	* @err_type: one of enum vport_err_type types to indicate the error type
	372	*
	373	* If using the vport generic stats layer indicate that an error of the given
	374	* type has occured.
	375	*/
	376	void ovs_vport_record_error(struct vport *vport, enum vport_err_type err_type)
	377	{
	378	spin_lock(&vport->stats_lock);
	379
	380	switch (err_type) {
	381	case VPORT_E_RX_DROPPED:
	382	vport->err_stats.rx_dropped++;
	383	break;
	384
	385	case VPORT_E_RX_ERROR:
	386	vport->err_stats.rx_errors++;
	387	break;
	388
	389	case VPORT_E_TX_DROPPED:
	390	vport->err_stats.tx_dropped++;
	391	break;
	392
	393	case VPORT_E_TX_ERROR:
	394	vport->err_stats.tx_errors++;
	395	break;
a2bf91b5	396	}
ccb1352e JG	397
	398	spin_unlock(&vport->stats_lock);
	399	}