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authorwangchuanlei <wangchuanlei@inspur.com>2022-12-07 04:38:57 +0300
committerDavid S. Miller <davem@davemloft.net>2022-12-09 13:43:46 +0300
commit1933ea365aa7a48ce26bea2ea09c9f7cc48cc668 (patch)
tree9f529b454284d42ff7cb10a7847002af3a2a7ffd /net/openvswitch
parente47877c7aa821c413b45e05f804819579bdfa1a3 (diff)
downloadlinux-1933ea365aa7a48ce26bea2ea09c9f7cc48cc668.tar.xz
net: openvswitch: Add support to count upcall packets
Add support to count upall packets, when kmod of openvswitch upcall to count the number of packets for upcall succeed and failed, which is a better way to see how many packets upcalled on every interfaces. Signed-off-by: wangchuanlei <wangchuanlei@inspur.com> Acked-by: Eelco Chaudron <echaudro@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch')
-rw-r--r--net/openvswitch/datapath.c41
-rw-r--r--net/openvswitch/vport.c50
-rw-r--r--net/openvswitch/vport.h16
3 files changed, 107 insertions, 0 deletions
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 861dfb8daf4a..932bcf766d63 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -209,6 +209,26 @@ static struct vport *new_vport(const struct vport_parms *parms)
return vport;
}
+static void ovs_vport_update_upcall_stats(struct sk_buff *skb,
+ const struct dp_upcall_info *upcall_info,
+ bool upcall_result)
+{
+ struct vport *p = OVS_CB(skb)->input_vport;
+ struct vport_upcall_stats_percpu *stats;
+
+ if (upcall_info->cmd != OVS_PACKET_CMD_MISS &&
+ upcall_info->cmd != OVS_PACKET_CMD_ACTION)
+ return;
+
+ stats = this_cpu_ptr(p->upcall_stats);
+ u64_stats_update_begin(&stats->syncp);
+ if (upcall_result)
+ u64_stats_inc(&stats->n_success);
+ else
+ u64_stats_inc(&stats->n_fail);
+ u64_stats_update_end(&stats->syncp);
+}
+
void ovs_dp_detach_port(struct vport *p)
{
ASSERT_OVSL();
@@ -216,6 +236,9 @@ void ovs_dp_detach_port(struct vport *p)
/* First drop references to device. */
hlist_del_rcu(&p->dp_hash_node);
+ /* Free percpu memory */
+ free_percpu(p->upcall_stats);
+
/* Then destroy it. */
ovs_vport_del(p);
}
@@ -305,6 +328,8 @@ int ovs_dp_upcall(struct datapath *dp, struct sk_buff *skb,
err = queue_userspace_packet(dp, skb, key, upcall_info, cutlen);
else
err = queue_gso_packets(dp, skb, key, upcall_info, cutlen);
+
+ ovs_vport_update_upcall_stats(skb, upcall_info, !err);
if (err)
goto err;
@@ -1826,6 +1851,12 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
goto err_destroy_portids;
}
+ vport->upcall_stats = netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
+ if (!vport->upcall_stats) {
+ err = -ENOMEM;
+ goto err_destroy_portids;
+ }
+
err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
info->snd_seq, 0, OVS_DP_CMD_NEW);
BUG_ON(err < 0);
@@ -2098,6 +2129,9 @@ static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
OVS_VPORT_ATTR_PAD))
goto nla_put_failure;
+ if (ovs_vport_get_upcall_stats(vport, skb))
+ goto nla_put_failure;
+
if (ovs_vport_get_upcall_portids(vport, skb))
goto nla_put_failure;
@@ -2279,6 +2313,12 @@ restart:
goto exit_unlock_free;
}
+ vport->upcall_stats = netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
+ if (!vport->upcall_stats) {
+ err = -ENOMEM;
+ goto exit_unlock_free;
+ }
+
err = ovs_vport_cmd_fill_info(vport, reply, genl_info_net(info),
info->snd_portid, info->snd_seq, 0,
OVS_VPORT_CMD_NEW, GFP_KERNEL);
@@ -2508,6 +2548,7 @@ static const struct nla_policy vport_policy[OVS_VPORT_ATTR_MAX + 1] = {
[OVS_VPORT_ATTR_OPTIONS] = { .type = NLA_NESTED },
[OVS_VPORT_ATTR_IFINDEX] = { .type = NLA_U32 },
[OVS_VPORT_ATTR_NETNSID] = { .type = NLA_S32 },
+ [OVS_VPORT_ATTR_UPCALL_STATS] = { .type = NLA_NESTED },
};
static const struct genl_small_ops dp_vport_genl_ops[] = {
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index 82a74f998966..7e0f5c45b512 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -285,6 +285,56 @@ void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
}
/**
+ * ovs_vport_get_upcall_stats - retrieve upcall stats
+ *
+ * @vport: vport from which to retrieve the stats.
+ * @skb: sk_buff where upcall stats should be appended.
+ *
+ * Retrieves upcall stats for the given device.
+ *
+ * Must be called with ovs_mutex or rcu_read_lock.
+ */
+int ovs_vport_get_upcall_stats(struct vport *vport, struct sk_buff *skb)
+{
+ struct nlattr *nla;
+ int i;
+
+ __u64 tx_success = 0;
+ __u64 tx_fail = 0;
+
+ for_each_possible_cpu(i) {
+ const struct vport_upcall_stats_percpu *stats;
+ unsigned int start;
+
+ stats = per_cpu_ptr(vport->upcall_stats, i);
+ do {
+ start = u64_stats_fetch_begin(&stats->syncp);
+ tx_success += u64_stats_read(&stats->n_success);
+ tx_fail += u64_stats_read(&stats->n_fail);
+ } while (u64_stats_fetch_retry(&stats->syncp, start));
+ }
+
+ nla = nla_nest_start_noflag(skb, OVS_VPORT_ATTR_UPCALL_STATS);
+ if (!nla)
+ return -EMSGSIZE;
+
+ if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_ATTR_SUCCESS, tx_success,
+ OVS_VPORT_ATTR_PAD)) {
+ nla_nest_cancel(skb, nla);
+ return -EMSGSIZE;
+ }
+
+ if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_ATTR_FAIL, tx_fail,
+ OVS_VPORT_ATTR_PAD)) {
+ nla_nest_cancel(skb, nla);
+ return -EMSGSIZE;
+ }
+ nla_nest_end(skb, nla);
+
+ return 0;
+}
+
+/**
* ovs_vport_get_options - retrieve device options
*
* @vport: vport from which to retrieve the options.
diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h
index 6ff45e8a0868..3e71ca8ad8a7 100644
--- a/net/openvswitch/vport.h
+++ b/net/openvswitch/vport.h
@@ -32,6 +32,8 @@ struct vport *ovs_vport_locate(const struct net *net, const char *name);
void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
+int ovs_vport_get_upcall_stats(struct vport *vport, struct sk_buff *skb);
+
int ovs_vport_set_options(struct vport *, struct nlattr *options);
int ovs_vport_get_options(const struct vport *, struct sk_buff *);
@@ -65,6 +67,7 @@ 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.
+ * @upcall_stats: Upcall stats of every ports.
* @detach_list: list used for detaching vport in net-exit call.
* @rcu: RCU callback head for deferred destruction.
*/
@@ -78,6 +81,7 @@ struct vport {
struct hlist_node hash_node;
struct hlist_node dp_hash_node;
const struct vport_ops *ops;
+ struct vport_upcall_stats_percpu __percpu *upcall_stats;
struct list_head detach_list;
struct rcu_head rcu;
@@ -137,6 +141,18 @@ struct vport_ops {
struct list_head list;
};
+/**
+ * struct vport_upcall_stats_percpu - per-cpu packet upcall statistics for
+ * a given vport.
+ * @n_success: Number of packets that upcall to userspace succeed.
+ * @n_fail: Number of packets that upcall to userspace failed.
+ */
+struct vport_upcall_stats_percpu {
+ struct u64_stats_sync syncp;
+ u64_stats_t n_success;
+ u64_stats_t n_fail;
+};
+
struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *,
const struct vport_parms *);
void ovs_vport_free(struct vport *);