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openvswitch: Remove vport stats.

Browse Source 
Since all vport types are now backed by netdev, we can directly
use netdev stats. Following patch removes redundant stat
from vport.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pravin B Shelar 2015-08-29 17:44:07 -07:00 committed by David S. Miller
parent 3eedb41fb4
commit 8c876639c9
5 changed files with 56 additions and 170 deletions
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57
net/openvswitch/vport-internal_dev.c
View File

@ -43,35 +43,26 @@ static struct internal_dev *internal_dev_priv(struct net_device *netdev)
return netdev_priv(netdev); return netdev_priv(netdev);
} }
/* This function is only called by the kernel network layer.*/
static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
struct rtnl_link_stats64 *stats)
{
struct vport *vport = ovs_internal_dev_get_vport(netdev);
struct ovs_vport_stats vport_stats;
ovs_vport_get_stats(vport, &vport_stats);
/* The tx and rx stats need to be swapped because the
* switch and host OS have opposite perspectives. */
stats->rx_packets = vport_stats.tx_packets;
stats->tx_packets = vport_stats.rx_packets;
stats->rx_bytes = vport_stats.tx_bytes;
stats->tx_bytes = vport_stats.rx_bytes;
stats->rx_errors = vport_stats.tx_errors;
stats->tx_errors = vport_stats.rx_errors;
stats->rx_dropped = vport_stats.tx_dropped;
stats->tx_dropped = vport_stats.rx_dropped;
return stats;
}
/* Called with rcu_read_lock_bh. */ /* Called with rcu_read_lock_bh. */
static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev) static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
{ {
int len, err;
len = skb->len;
rcu_read_lock(); rcu_read_lock();
ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL); err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
rcu_read_unlock(); rcu_read_unlock();
if (likely(!err)) {
struct pcpu_sw_netstats *tstats = this_cpu_ptr(netdev->tstats);
u64_stats_update_begin(&tstats->syncp);
tstats->tx_bytes += len;
tstats->tx_packets++;
u64_stats_update_end(&tstats->syncp);
} else {
netdev->stats.tx_errors++;
}
return 0; return 0;
} }
@ -121,7 +112,6 @@ static const struct net_device_ops internal_dev_netdev_ops = {
.ndo_start_xmit = internal_dev_xmit, .ndo_start_xmit = internal_dev_xmit,
.ndo_set_mac_address = eth_mac_addr, .ndo_set_mac_address = eth_mac_addr,
.ndo_change_mtu = internal_dev_change_mtu, .ndo_change_mtu = internal_dev_change_mtu,
.ndo_get_stats64 = internal_dev_get_stats,
}; };
static struct rtnl_link_ops internal_dev_link_ops __read_mostly = { static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
@ -212,18 +202,17 @@ static void internal_dev_destroy(struct vport *vport)
rtnl_unlock(); rtnl_unlock();
} }
static int internal_dev_recv(struct vport *vport, struct sk_buff *skb) static void internal_dev_recv(struct vport *vport, struct sk_buff *skb)
{ {
struct net_device *netdev = vport->dev; struct net_device *netdev = vport->dev;
int len; struct pcpu_sw_netstats *stats;
if (unlikely(!(netdev->flags & IFF_UP))) { if (unlikely(!(netdev->flags & IFF_UP))) {
kfree_skb(skb); kfree_skb(skb);
return 0; netdev->stats.rx_dropped++;
return;
} }
len = skb->len;
skb_dst_drop(skb); skb_dst_drop(skb);
nf_reset(skb); nf_reset(skb);
secpath_reset(skb); secpath_reset(skb);
@ -233,9 +222,13 @@ static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
skb->protocol = eth_type_trans(skb, netdev); skb->protocol = eth_type_trans(skb, netdev);
skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN); skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
netif_rx(skb); stats = this_cpu_ptr(netdev->tstats);
u64_stats_update_begin(&stats->syncp);
stats->rx_packets++;
stats->rx_bytes += skb->len;
u64_stats_update_end(&stats->syncp);
return len; netif_rx(skb);
} }
static struct vport_ops ovs_internal_vport_ops = { static struct vport_ops ovs_internal_vport_ops = {

22
net/openvswitch/vport-netdev.c
View File

@ -39,8 +39,11 @@
static struct vport_ops ovs_netdev_vport_ops; static struct vport_ops ovs_netdev_vport_ops;
/* Must be called with rcu_read_lock. */ /* Must be called with rcu_read_lock. */
static void netdev_port_receive(struct vport *vport, struct sk_buff *skb) static void netdev_port_receive(struct sk_buff *skb)
{ {
struct vport *vport;
vport = ovs_netdev_get_vport(skb->dev);
if (unlikely(!vport)) if (unlikely(!vport))
goto error; goto error;
@ -56,10 +59,8 @@ static void netdev_port_receive(struct vport *vport, struct sk_buff *skb)
skb_push(skb, ETH_HLEN); skb_push(skb, ETH_HLEN);
ovs_skb_postpush_rcsum(skb, skb->data, ETH_HLEN); ovs_skb_postpush_rcsum(skb, skb->data, ETH_HLEN);
ovs_vport_receive(vport, skb, skb_tunnel_info(skb)); ovs_vport_receive(vport, skb, skb_tunnel_info(skb));
return; return;
error: error:
kfree_skb(skb); kfree_skb(skb);
} }
@ -68,15 +69,11 @@ error:
static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb) static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb)
{ {
struct sk_buff *skb = *pskb; struct sk_buff *skb = *pskb;
struct vport *vport;
if (unlikely(skb->pkt_type == PACKET_LOOPBACK)) if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
return RX_HANDLER_PASS; return RX_HANDLER_PASS;
vport = ovs_netdev_get_vport(skb->dev); netdev_port_receive(skb);
netdev_port_receive(vport, skb);
return RX_HANDLER_CONSUMED; return RX_HANDLER_CONSUMED;
} }
@ -203,27 +200,24 @@ static unsigned int packet_length(const struct sk_buff *skb)
return length; return length;
} }
int ovs_netdev_send(struct vport *vport, struct sk_buff *skb) void ovs_netdev_send(struct vport *vport, struct sk_buff *skb)
{ {
int mtu = vport->dev->mtu; int mtu = vport->dev->mtu;
int len;
if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) { if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) {
net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n", net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n",
vport->dev->name, vport->dev->name,
packet_length(skb), mtu); packet_length(skb), mtu);
vport->dev->stats.tx_errors++;
goto drop; goto drop;
} }
skb->dev = vport->dev; skb->dev = vport->dev;
len = skb->len;
dev_queue_xmit(skb); dev_queue_xmit(skb);
return;
return len;
drop: drop:
kfree_skb(skb); kfree_skb(skb);
return 0;
} }
EXPORT_SYMBOL_GPL(ovs_netdev_send); EXPORT_SYMBOL_GPL(ovs_netdev_send);

2
net/openvswitch/vport-netdev.h
View File

@ -27,7 +27,7 @@
struct vport *ovs_netdev_get_vport(struct net_device *dev); struct vport *ovs_netdev_get_vport(struct net_device *dev);
struct vport *ovs_netdev_link(struct vport *vport, const char *name); struct vport *ovs_netdev_link(struct vport *vport, const char *name);
int ovs_netdev_send(struct vport *vport, struct sk_buff *skb); void ovs_netdev_send(struct vport *vport, struct sk_buff *skb);
void ovs_netdev_detach_dev(struct vport *); void ovs_netdev_detach_dev(struct vport *);
int __init ovs_netdev_init(void); int __init ovs_netdev_init(void);

107
net/openvswitch/vport.c
View File

@ -34,9 +34,6 @@
#include "vport.h" #include "vport.h"
#include "vport-internal_dev.h" #include "vport-internal_dev.h"
static void ovs_vport_record_error(struct vport *,
enum vport_err_type err_type);
static LIST_HEAD(vport_ops_list); static LIST_HEAD(vport_ops_list);
/* Protected by RCU read lock for reading, ovs_mutex for writing. */ /* Protected by RCU read lock for reading, ovs_mutex for writing. */
@ -157,12 +154,6 @@ struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
return ERR_PTR(-EINVAL); return ERR_PTR(-EINVAL);
} }
vport->percpu_stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
if (!vport->percpu_stats) {
kfree(vport);
return ERR_PTR(-ENOMEM);
}
return vport; return vport;
} }
EXPORT_SYMBOL_GPL(ovs_vport_alloc); EXPORT_SYMBOL_GPL(ovs_vport_alloc);
@ -183,7 +174,6 @@ void ovs_vport_free(struct vport *vport)
* it is safe to use raw dereference. * it is safe to use raw dereference.
*/ */
kfree(rcu_dereference_raw(vport->upcall_portids)); kfree(rcu_dereference_raw(vport->upcall_portids));
free_percpu(vport->percpu_stats);
kfree(vport); kfree(vport);
} }
EXPORT_SYMBOL_GPL(ovs_vport_free); EXPORT_SYMBOL_GPL(ovs_vport_free);
@ -290,30 +280,24 @@ void ovs_vport_del(struct vport *vport)
*/ */
void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats) void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
{ {
struct net_device *dev = vport->dev;
int i; int i;
memset(stats, 0, sizeof(*stats)); memset(stats, 0, sizeof(*stats));
stats->rx_errors = dev->stats.rx_errors;
stats->tx_errors = dev->stats.tx_errors;
stats->tx_dropped = dev->stats.tx_dropped;
stats->rx_dropped = dev->stats.rx_dropped;
/* We potentially have 2 sources of stats that need to be combined: stats->rx_dropped += atomic_long_read(&dev->rx_dropped);
* those we have collected (split into err_stats and percpu_stats) from stats->tx_dropped += atomic_long_read(&dev->tx_dropped);
* 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.
*/
stats->rx_errors = atomic_long_read(&vport->err_stats.rx_errors);
stats->tx_errors = atomic_long_read(&vport->err_stats.tx_errors);
stats->tx_dropped = atomic_long_read(&vport->err_stats.tx_dropped);
stats->rx_dropped = atomic_long_read(&vport->err_stats.rx_dropped);
for_each_possible_cpu(i) { for_each_possible_cpu(i) {
const struct pcpu_sw_netstats *percpu_stats; const struct pcpu_sw_netstats *percpu_stats;
struct pcpu_sw_netstats local_stats; struct pcpu_sw_netstats local_stats;
unsigned int start; unsigned int start;
percpu_stats = per_cpu_ptr(vport->percpu_stats, i); percpu_stats = per_cpu_ptr(dev->tstats, i);
do { do {
start = u64_stats_fetch_begin_irq(&percpu_stats->syncp); start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
@ -468,94 +452,25 @@ u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb)
* Must be called with rcu_read_lock. The packet cannot be shared and * Must be called with rcu_read_lock. The packet cannot be shared and
* skb->data should point to the Ethernet header. * skb->data should point to the Ethernet header.
*/ */
void ovs_vport_receive(struct vport *vport, struct sk_buff *skb, int ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
const struct ip_tunnel_info *tun_info) const struct ip_tunnel_info *tun_info)
{ {
struct pcpu_sw_netstats *stats;
struct sw_flow_key key; struct sw_flow_key key;
int error; int error;
stats = this_cpu_ptr(vport->percpu_stats);
u64_stats_update_begin(&stats->syncp);
stats->rx_packets++;
stats->rx_bytes += skb->len +
(skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);
u64_stats_update_end(&stats->syncp);
OVS_CB(skb)->input_vport = vport; OVS_CB(skb)->input_vport = vport;
OVS_CB(skb)->mru = 0; OVS_CB(skb)->mru = 0;
/* Extract flow from 'skb' into 'key'. */ /* Extract flow from 'skb' into 'key'. */
error = ovs_flow_key_extract(tun_info, skb, &key); error = ovs_flow_key_extract(tun_info, skb, &key);
if (unlikely(error)) { if (unlikely(error)) {
kfree_skb(skb); kfree_skb(skb);
return; return error;
} }
ovs_dp_process_packet(skb, &key); ovs_dp_process_packet(skb, &key);
return 0;
} }
EXPORT_SYMBOL_GPL(ovs_vport_receive); EXPORT_SYMBOL_GPL(ovs_vport_receive);
/**
* 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 > 0)) {
struct pcpu_sw_netstats *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);
} else if (sent < 0) {
ovs_vport_record_error(vport, VPORT_E_TX_ERROR);
} else {
ovs_vport_record_error(vport, VPORT_E_TX_DROPPED);
}
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 occurred.
*/
static void ovs_vport_record_error(struct vport *vport,
enum vport_err_type err_type)
{
switch (err_type) {
case VPORT_E_RX_DROPPED:
atomic_long_inc(&vport->err_stats.rx_dropped);
break;
case VPORT_E_RX_ERROR:
atomic_long_inc(&vport->err_stats.rx_errors);
break;
case VPORT_E_TX_DROPPED:
atomic_long_inc(&vport->err_stats.tx_dropped);
break;
case VPORT_E_TX_ERROR:
atomic_long_inc(&vport->err_stats.tx_errors);
break;
}
}
static void free_vport_rcu(struct rcu_head *rcu) static void free_vport_rcu(struct rcu_head *rcu)
{ {
struct vport *vport = container_of(rcu, struct vport, rcu); struct vport *vport = container_of(rcu, struct vport, rcu);

34
net/openvswitch/vport.h
View File

@ -57,8 +57,6 @@ int ovs_vport_set_upcall_portids(struct vport *, const struct nlattr *pids);
int ovs_vport_get_upcall_portids(const struct vport *, struct sk_buff *); int ovs_vport_get_upcall_portids(const struct vport *, struct sk_buff *);
u32 ovs_vport_find_upcall_portid(const struct vport *, struct sk_buff *); u32 ovs_vport_find_upcall_portid(const struct vport *, struct sk_buff *);
int ovs_vport_send(struct vport *, struct sk_buff *);
int ovs_tunnel_get_egress_info(struct ip_tunnel_info *egress_tun_info, int ovs_tunnel_get_egress_info(struct ip_tunnel_info *egress_tun_info,
struct net *net, struct net *net,
struct sk_buff *, struct sk_buff *,
@ -68,14 +66,6 @@ int ovs_tunnel_get_egress_info(struct ip_tunnel_info *egress_tun_info,
int ovs_vport_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, int ovs_vport_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
struct ip_tunnel_info *info); struct ip_tunnel_info *info);
/* The following definitions are for implementers of vport devices: */
struct vport_err_stats {
atomic_long_t rx_dropped;
atomic_long_t rx_errors;
atomic_long_t tx_dropped;
atomic_long_t tx_errors;
};
/** /**
* struct vport_portids - array of netlink portids of a vport. * struct vport_portids - array of netlink portids of a vport.
* must be protected by rcu. * must be protected by rcu.
@ -101,8 +91,6 @@ struct vport_portids {
* @hash_node: Element in @dev_table hash table in vport.c. * @hash_node: Element in @dev_table hash table in vport.c.
* @dp_hash_node: Element in @datapath->ports hash table in datapath.c. * @dp_hash_node: Element in @datapath->ports hash table in datapath.c.
* @ops: Class structure. * @ops: Class structure.
* @percpu_stats: Points to per-CPU statistics used and maintained by vport
* @err_stats: Points to error statistics used and maintained by vport
* @detach_list: list used for detaching vport in net-exit call. * @detach_list: list used for detaching vport in net-exit call.
*/ */
struct vport { struct vport {
@ -115,9 +103,6 @@ struct vport {
struct hlist_node dp_hash_node; struct hlist_node dp_hash_node;
const struct vport_ops *ops; const struct vport_ops *ops;
struct pcpu_sw_netstats __percpu *percpu_stats;
struct vport_err_stats err_stats;
struct list_head detach_list; struct list_head detach_list;
struct rcu_head rcu; struct rcu_head rcu;
}; };
@ -156,7 +141,7 @@ struct vport_parms {
* @get_options: Appends vport-specific attributes for the configuration of an * @get_options: Appends vport-specific attributes for the configuration of an
* existing vport to a &struct sk_buff. May be %NULL for a vport that does not * existing vport to a &struct sk_buff. May be %NULL for a vport that does not
* have any configuration. * have any configuration.
* @send: Send a packet on the device. Returns the length of the packet sent, * @send: Send a packet on the device.
* zero for dropped packets or negative for error. * zero for dropped packets or negative for error.
* @get_egress_tun_info: Get the egress tunnel 5-tuple and other info for * @get_egress_tun_info: Get the egress tunnel 5-tuple and other info for
* a packet. * a packet.
@ -171,7 +156,7 @@ struct vport_ops {
int (*set_options)(struct vport *, struct nlattr *); int (*set_options)(struct vport *, struct nlattr *);
int (*get_options)(const struct vport *, struct sk_buff *); int (*get_options)(const struct vport *, struct sk_buff *);
int (*send)(struct vport *, struct sk_buff *); void (*send)(struct vport *, struct sk_buff *);
int (*get_egress_tun_info)(struct vport *, struct sk_buff *, int (*get_egress_tun_info)(struct vport *, struct sk_buff *,
struct ip_tunnel_info *); struct ip_tunnel_info *);
@ -179,13 +164,6 @@ struct vport_ops {
struct list_head list; struct list_head list;
}; };
enum vport_err_type {
VPORT_E_RX_DROPPED,
VPORT_E_RX_ERROR,
VPORT_E_TX_DROPPED,
VPORT_E_TX_ERROR,
};
struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *, struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *,
const struct vport_parms *); const struct vport_parms *);
void ovs_vport_free(struct vport *); void ovs_vport_free(struct vport *);
@ -222,7 +200,7 @@ static inline struct vport *vport_from_priv(void *priv)
return (struct vport *)((u8 *)priv - ALIGN(sizeof(struct vport), VPORT_ALIGN)); return (struct vport *)((u8 *)priv - ALIGN(sizeof(struct vport), VPORT_ALIGN));
} }
void ovs_vport_receive(struct vport *, struct sk_buff *, int ovs_vport_receive(struct vport *, struct sk_buff *,
const struct ip_tunnel_info *); const struct ip_tunnel_info *);
static inline void ovs_skb_postpush_rcsum(struct sk_buff *skb, static inline void ovs_skb_postpush_rcsum(struct sk_buff *skb,
@ -258,4 +236,10 @@ static inline struct rtable *ovs_tunnel_route_lookup(struct net *net,
rt = ip_route_output_key(net, fl); rt = ip_route_output_key(net, fl);
return rt; return rt;
} }
static inline void ovs_vport_send(struct vport *vport, struct sk_buff *skb)
{
vport->ops->send(vport, skb);
}
#endif /* vport.h */ #endif /* vport.h */