| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1440895448-16363-4-git-send-email-pshelar@nicira.com>
Date: Sat, 29 Aug 2015 17:44:07 -0700
From: Pravin B Shelar <pshelar@...ira.com>
To: netdev@...r.kernel.org
Cc: Pravin B Shelar <pshelar@...ira.com>
Subject: [PATCH net-next 3/4] openvswitch: Remove vport stats.
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@...ira.com>
---
net/openvswitch/vport-internal_dev.c | 57 ++++++++----------
net/openvswitch/vport-netdev.c | 22 +++----
net/openvswitch/vport-netdev.h | 2 +-
net/openvswitch/vport.c | 109 ++++------------------------------
net/openvswitch/vport.h | 36 +++--------
5 files changed, 56 insertions(+), 170 deletions(-)
diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c
index 80b3e12..388b8a6 100644
--- a/net/openvswitch/vport-internal_dev.c
+++ b/net/openvswitch/vport-internal_dev.c
@@ -43,35 +43,26 @@ static struct internal_dev *internal_dev_priv(struct net_device *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. */
static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
{
+ int len, err;
+
+ len = skb->len;
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();
+
+ 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;
}
@@ -121,7 +112,6 @@ static const struct net_device_ops internal_dev_netdev_ops = {
.ndo_start_xmit = internal_dev_xmit,
.ndo_set_mac_address = eth_mac_addr,
.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 = {
@@ -212,18 +202,17 @@ static void internal_dev_destroy(struct vport *vport)
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;
- int len;
+ struct pcpu_sw_netstats *stats;
if (unlikely(!(netdev->flags & IFF_UP))) {
kfree_skb(skb);
- return 0;
+ netdev->stats.rx_dropped++;
+ return;
}
- len = skb->len;
-
skb_dst_drop(skb);
nf_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_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 = {
diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c
index a750115..f7e8dcc 100644
--- a/net/openvswitch/vport-netdev.c
+++ b/net/openvswitch/vport-netdev.c
@@ -39,8 +39,11 @@
static struct vport_ops ovs_netdev_vport_ops;
/* 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))
goto error;
@@ -56,10 +59,8 @@ static void netdev_port_receive(struct vport *vport, struct sk_buff *skb)
skb_push(skb, ETH_HLEN);
ovs_skb_postpush_rcsum(skb, skb->data, ETH_HLEN);
-
ovs_vport_receive(vport, skb, skb_tunnel_info(skb));
return;
-
error:
kfree_skb(skb);
}
@@ -68,15 +69,11 @@ error:
static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb)
{
struct sk_buff *skb = *pskb;
- struct vport *vport;
if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
return RX_HANDLER_PASS;
- vport = ovs_netdev_get_vport(skb->dev);
-
- netdev_port_receive(vport, skb);
-
+ netdev_port_receive(skb);
return RX_HANDLER_CONSUMED;
}
@@ -203,27 +200,24 @@ static unsigned int packet_length(const struct sk_buff *skb)
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 len;
if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) {
net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n",
vport->dev->name,
packet_length(skb), mtu);
+ vport->dev->stats.tx_errors++;
goto drop;
}
skb->dev = vport->dev;
- len = skb->len;
dev_queue_xmit(skb);
-
- return len;
+ return;
drop:
kfree_skb(skb);
- return 0;
}
EXPORT_SYMBOL_GPL(ovs_netdev_send);
diff --git a/net/openvswitch/vport-netdev.h b/net/openvswitch/vport-netdev.h
index 497cc81..bf22fce 100644
--- a/net/openvswitch/vport-netdev.h
+++ b/net/openvswitch/vport-netdev.h
@@ -27,7 +27,7 @@
struct vport *ovs_netdev_get_vport(struct net_device *dev);
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 *);
int __init ovs_netdev_init(void);
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index bd118f2..c5895d5 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -34,9 +34,6 @@
#include "vport.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);
/* 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);
}
- vport->percpu_stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
- if (!vport->percpu_stats) {
- kfree(vport);
- return ERR_PTR(-ENOMEM);
- }
-
return vport;
}
EXPORT_SYMBOL_GPL(ovs_vport_alloc);
@@ -183,7 +174,6 @@ void ovs_vport_free(struct vport *vport)
* it is safe to use raw dereference.
*/
kfree(rcu_dereference_raw(vport->upcall_portids));
- free_percpu(vport->percpu_stats);
kfree(vport);
}
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)
{
+ struct net_device *dev = vport->dev;
int i;
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:
- * 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.
- */
-
- 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);
+ stats->rx_dropped += atomic_long_read(&dev->rx_dropped);
+ stats->tx_dropped += atomic_long_read(&dev->tx_dropped);
for_each_possible_cpu(i) {
const struct pcpu_sw_netstats *percpu_stats;
struct pcpu_sw_netstats local_stats;
unsigned int start;
- percpu_stats = per_cpu_ptr(vport->percpu_stats, i);
+ percpu_stats = per_cpu_ptr(dev->tstats, i);
do {
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
* skb->data should point to the Ethernet header.
*/
-void ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
- const struct ip_tunnel_info *tun_info)
+int ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
+ const struct ip_tunnel_info *tun_info)
{
- struct pcpu_sw_netstats *stats;
struct sw_flow_key key;
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)->mru = 0;
/* Extract flow from 'skb' into 'key'. */
error = ovs_flow_key_extract(tun_info, skb, &key);
if (unlikely(error)) {
kfree_skb(skb);
- return;
+ return error;
}
ovs_dp_process_packet(skb, &key);
+ return 0;
}
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)
{
struct vport *vport = container_of(rcu, struct vport, rcu);
diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h
index a36aef2..30615ed 100644
--- a/net/openvswitch/vport.h
+++ b/net/openvswitch/vport.h
@@ -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 *);
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,
struct net *net,
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,
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.
* must be protected by rcu.
@@ -101,8 +91,6 @@ struct vport_portids {
* @hash_node: Element in @dev_table hash table in vport.c.
* @dp_hash_node: Element in @datapath->ports hash table in datapath.c.
* @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.
*/
struct vport {
@@ -115,9 +103,6 @@ struct vport {
struct hlist_node dp_hash_node;
const struct vport_ops *ops;
- struct pcpu_sw_netstats __percpu *percpu_stats;
-
- struct vport_err_stats err_stats;
struct list_head detach_list;
struct rcu_head rcu;
};
@@ -156,7 +141,7 @@ struct vport_parms {
* @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
* 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.
* @get_egress_tun_info: Get the egress tunnel 5-tuple and other info for
* a packet.
@@ -171,7 +156,7 @@ struct vport_ops {
int (*set_options)(struct vport *, struct nlattr *);
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 *,
struct ip_tunnel_info *);
@@ -179,13 +164,6 @@ struct vport_ops {
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 *,
const struct vport_parms *);
void ovs_vport_free(struct vport *);
@@ -222,8 +200,8 @@ static inline struct vport *vport_from_priv(void *priv)
return (struct vport *)((u8 *)priv - ALIGN(sizeof(struct vport), VPORT_ALIGN));
}
-void ovs_vport_receive(struct vport *, struct sk_buff *,
- const struct ip_tunnel_info *);
+int ovs_vport_receive(struct vport *, struct sk_buff *,
+ const struct ip_tunnel_info *);
static inline void ovs_skb_postpush_rcsum(struct sk_buff *skb,
const void *start, unsigned int len)
@@ -258,4 +236,10 @@ static inline struct rtable *ovs_tunnel_route_lookup(struct net *net,
rt = ip_route_output_key(net, fl);
return rt;
}
+
+static inline void ovs_vport_send(struct vport *vport, struct sk_buff *skb)
+{
+ vport->ops->send(vport, skb);
+}
+
#endif /* vport.h */
--
1.7.1
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists