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* [PATCH] [openvswitch v4] openvswitch: Add support to count upcall packets
@ 2022-11-23  9:18 wangchuanlei
  2022-11-23 18:38 ` Alexander Lobakin
                   ` (2 more replies)
  0 siblings, 3 replies; 11+ messages in thread
From: wangchuanlei @ 2022-11-23  9:18 UTC (permalink / raw)
  To: pabeni, echaudro, pshelar, davem, edumazet, kuba
  Cc: wangpeihui, netdev, dev, linux-kernel, wangchuanlei

Add support to count upall packets, when kmod of openvswitch
upcall to userspace , here count the number of packets for
upcall succeed and failed, which is a better way to see how
many packets upcalled to userspace(ovs-vswitchd) on every
interfaces.

Here optimize the function used by comments of v3.

Changes since v3:
- use nested NLA_NESTED attribute in netlink message

Changes since v2:
- add count of upcall failed packets

Changes since v1:
- add count of upcall succeed packets

Signed-off-by: wangchuanlei <wangchuanlei@inspur.com>
---
 include/uapi/linux/openvswitch.h | 19 ++++++++++++
 net/openvswitch/datapath.c       | 52 ++++++++++++++++++++++++++++++++
 net/openvswitch/datapath.h       | 12 ++++++++
 net/openvswitch/vport.c          | 48 +++++++++++++++++++++++++++++
 net/openvswitch/vport.h          |  6 ++++
 5 files changed, 137 insertions(+)

diff --git a/include/uapi/linux/openvswitch.h b/include/uapi/linux/openvswitch.h
index 94066f87e9ee..fa13bce15fae 100644
--- a/include/uapi/linux/openvswitch.h
+++ b/include/uapi/linux/openvswitch.h
@@ -126,6 +126,11 @@ struct ovs_vport_stats {
 	__u64   tx_dropped;		/* no space available in linux  */
 };
 
+struct ovs_vport_upcall_stats {
+	uint64_t   upcall_success;	/* total packets upcalls succeed */
+	uint64_t   upcall_fail;		/* total packets upcalls failed  */
+};
+
 /* Allow last Netlink attribute to be unaligned */
 #define OVS_DP_F_UNALIGNED	(1 << 0)
 
@@ -277,11 +282,25 @@ enum ovs_vport_attr {
 	OVS_VPORT_ATTR_PAD,
 	OVS_VPORT_ATTR_IFINDEX,
 	OVS_VPORT_ATTR_NETNSID,
+	OVS_VPORT_ATTR_UPCALL_STATS, /* struct ovs_vport_upcall_stats */
 	__OVS_VPORT_ATTR_MAX
 };
 
 #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
 
+/**
+ * enum ovs_vport_upcall_attr - attributes for %OVS_VPORT_UPCALL* commands
+ * @OVS_VPORT_UPCALL_SUCCESS: 64-bit upcall success packets.
+ * @OVS_VPORT_UPCALL_FAIL: 64-bit upcall fail packets.
+ */
+enum ovs_vport_upcall_attr {
+	OVS_VPORT_UPCALL_SUCCESS, /* 64-bit upcall success packets */
+	OVS_VPORT_UPCALL_FAIL, /* 64-bit upcall fail packets */
+	__OVS_VPORT_UPCALL_MAX
+};
+
+#define OVS_VPORT_UPCALL_MAX (__OVS_VPORT_UPCALL_MAX-1)
+
 enum {
 	OVS_VXLAN_EXT_UNSPEC,
 	OVS_VXLAN_EXT_GBP,	/* Flag or __u32 */
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index c8a9075ddd0a..5254c51cfa60 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -209,6 +209,25 @@ static struct vport *new_vport(const struct vport_parms *parms)
 	return vport;
 }
 
+static void ovs_vport_upcalls(struct sk_buff *skb,
+			      const struct dp_upcall_info *upcall_info,
+			      bool upcall_success)
+{
+	if (upcall_info->cmd == OVS_PACKET_CMD_MISS ||
+	    upcall_info->cmd == OVS_PACKET_CMD_ACTION) {
+		const struct vport *p = OVS_CB(skb)->input_vport;
+		struct vport_upcall_stats_percpu *vport_stats;
+
+		vport_stats = this_cpu_ptr(p->vport_upcall_stats_percpu);
+		u64_stats_update_begin(&vport_stats->syncp);
+		if (upcall_success)
+			u64_stats_inc(&vport_stats->n_upcall_success);
+		else
+			u64_stats_inc(&vport_stats->n_upcall_fail);
+		u64_stats_update_end(&vport_stats->syncp);
+	}
+}
+
 void ovs_dp_detach_port(struct vport *p)
 {
 	ASSERT_OVSL();
@@ -216,6 +235,9 @@ 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->vport_upcall_stats_percpu);
+
 	/* Then destroy it. */
 	ovs_vport_del(p);
 }
@@ -305,6 +327,8 @@ 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_upcalls(skb, upcall_info, !err);
 	if (err)
 		goto err;
 
@@ -1825,6 +1849,13 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
 		goto err_destroy_portids;
 	}
 
+	vport->vport_upcall_stats_percpu =
+				netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
+	if (!vport->vport_upcall_stats_percpu) {
+		err = -ENOMEM;
+		goto err_destroy_upcall_stats;
+	}
+
 	err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
 				   info->snd_seq, 0, OVS_DP_CMD_NEW);
 	BUG_ON(err < 0);
@@ -1837,6 +1868,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
 	ovs_notify(&dp_datapath_genl_family, reply, info);
 	return 0;
 
+err_destroy_upcall_stats:
 err_destroy_portids:
 	kfree(rcu_dereference_raw(dp->upcall_portids));
 err_unlock_and_destroy_meters:
@@ -2068,6 +2100,8 @@ static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
 {
 	struct ovs_header *ovs_header;
 	struct ovs_vport_stats vport_stats;
+	struct ovs_vport_upcall_stats stat;
+	struct nlattr *nla;
 	int err;
 
 	ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family,
@@ -2097,6 +2131,15 @@ static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
 			  OVS_VPORT_ATTR_PAD))
 		goto nla_put_failure;
 
+	nla = nla_nest_start_noflag(skb, OVS_VPORT_ATTR_UPCALL_STATS);
+	if (!nla)
+		goto nla_put_failure;
+
+	ovs_vport_get_upcall_stats(vport, &stat);
+	if (ovs_vport_put_upcall_stats(skb, &stat))
+		goto nla_put_failure;
+	nla_nest_end(skb, nla);
+
 	if (ovs_vport_get_upcall_portids(vport, skb))
 		goto nla_put_failure;
 
@@ -2278,6 +2321,14 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
 		goto exit_unlock_free;
 	}
 
+	vport->vport_upcall_stats_percpu =
+		netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
+
+	if (!vport->vport_upcall_stats_percpu) {
+		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);
@@ -2507,6 +2558,7 @@ 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/datapath.h b/net/openvswitch/datapath.h
index 0cd29971a907..933dec5e4175 100644
--- a/net/openvswitch/datapath.h
+++ b/net/openvswitch/datapath.h
@@ -50,6 +50,18 @@ struct dp_stats_percpu {
 	struct u64_stats_sync syncp;
 };
 
+/**
+ * struct vport_upcall_stats_percpu - per-cpu packet upcall statistics for
+ * a given vport.
+ * @n_upcall_success: Number of packets that upcall to userspace succeed.
+ * @n_upcall_fail:    Number of packets that upcall to userspace failed.
+ */
+struct vport_upcall_stats_percpu {
+	u64_stats_t n_upcall_success;
+	u64_stats_t n_upcall_fail;
+	struct u64_stats_sync syncp;
+};
+
 /**
  * struct dp_nlsk_pids - array of netlink portids of for a datapath.
  *                       This is used when OVS_DP_F_DISPATCH_UPCALL_PER_CPU
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index 82a74f998966..a69c9356b57c 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -284,6 +284,54 @@ void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
 	stats->tx_packets = dev_stats->tx_packets;
 }
 
+/**
+ *	ovs_vport_get_upcall_stats - retrieve upcall stats
+ *
+ * @vport: vport from which to retrieve the stats
+ * @ovs_vport_upcall_stats: location to store stats
+ *
+ * Retrieves upcall stats for the given device.
+ *
+ * Must be called with ovs_mutex or rcu_read_lock.
+ */
+void ovs_vport_get_upcall_stats(struct vport *vport, struct ovs_vport_upcall_stats *stats)
+{
+	int i;
+
+	stats->upcall_success = 0;
+	stats->upcall_fail = 0;
+
+	for_each_possible_cpu(i) {
+		const struct vport_upcall_stats_percpu *percpu_upcall_stats;
+		unsigned int start;
+
+		percpu_upcall_stats = per_cpu_ptr(vport->vport_upcall_stats_percpu, i);
+		do {
+			start = u64_stats_fetch_begin(&percpu_upcall_stats->syncp);
+			stats->upcall_success +=
+				u64_stats_read(&percpu_upcall_stats->n_upcall_success);
+			stats->upcall_fail += u64_stats_read(&percpu_upcall_stats->n_upcall_fail);
+		} while (u64_stats_fetch_retry(&percpu_upcall_stats->syncp, start));
+	}
+}
+
+int ovs_vport_put_upcall_stats(struct sk_buff *skb,
+			       struct ovs_vport_upcall_stats *stats)
+{
+	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_SUCCESS, stats->upcall_success,
+			      OVS_VPORT_ATTR_PAD))
+		goto nla_put_failure;
+
+	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_FAIL, stats->upcall_fail,
+			      OVS_VPORT_ATTR_PAD))
+		goto nla_put_failure;
+
+	return 0;
+
+nla_put_failure:
+	return -EMSGSIZE;
+}
+
 /**
  *	ovs_vport_get_options - retrieve device options
  *
diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h
index 7d276f60c000..02cf8c589588 100644
--- a/net/openvswitch/vport.h
+++ b/net/openvswitch/vport.h
@@ -32,6 +32,11 @@ struct vport *ovs_vport_locate(const struct net *net, const char *name);
 
 void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
 
+void ovs_vport_get_upcall_stats(struct vport *vport,
+				struct ovs_vport_upcall_stats *stats);
+int ovs_vport_put_upcall_stats(struct sk_buff *skb,
+			       struct ovs_vport_upcall_stats *stats);
+
 int ovs_vport_set_options(struct vport *, struct nlattr *options);
 int ovs_vport_get_options(const struct vport *, struct sk_buff *);
 
@@ -78,6 +83,7 @@ struct vport {
 	struct hlist_node hash_node;
 	struct hlist_node dp_hash_node;
 	const struct vport_ops *ops;
+	struct vport_upcall_stats_percpu __percpu *vport_upcall_stats_percpu;
 
 	struct list_head detach_list;
 	struct rcu_head rcu;
-- 
2.27.0


^ permalink raw reply related	[flat|nested] 11+ messages in thread
* Re: [PATCH] [openvswitch v4] openvswitch: Add support to count upcall packets
@ 2022-11-24  2:30 wangchuanlei
  0 siblings, 0 replies; 11+ messages in thread
From: wangchuanlei @ 2022-11-24  2:30 UTC (permalink / raw)
  To: alexandr.lobakin
  Cc: pabeni, echaudro, pshelar, davem, edumazet, kuba, wangpeihui,
	netdev, dev, linux-kernel, wangchuanlei

Hi,
    Thank you for review! I will give a new verson of patch based on your comments,
and i give a explanation on every comments from you, please see below!

Best reagrds!
wangchuanlei

From: Alexander Lobakin [mailto:alexandr.lobakin@intel.com] 
To: wangchuanlei@inspur.com

> From: wangchuanlei <wangchuanlei@inspur.com>
> Date: Wed, 23 Nov 2022 04:18:43 -0500

> Add support to count upall packets, when kmod of openvswitch upcall to 
> userspace , here count the number of packets for upcall succeed and 
> failed, which is a better way to see how many packets upcalled to 
> userspace(ovs-vswitchd) on every interfaces.
> 
> Here optimize the function used by comments of v3.
> 
> Changes since v3:
> - use nested NLA_NESTED attribute in netlink message
> 
> Changes since v2:
> - add count of upcall failed packets
> 
> Changes since v1:
> - add count of upcall succeed packets
> 
> Signed-off-by: wangchuanlei <wangchuanlei@inspur.com>
> ---
>  include/uapi/linux/openvswitch.h | 19 ++++++++++++
>  net/openvswitch/datapath.c       | 52 ++++++++++++++++++++++++++++++++
>  net/openvswitch/datapath.h       | 12 ++++++++
>  net/openvswitch/vport.c          | 48 +++++++++++++++++++++++++++++
>  net/openvswitch/vport.h          |  6 ++++
>  5 files changed, 137 insertions(+)
> 
> diff --git a/include/uapi/linux/openvswitch.h 
> b/include/uapi/linux/openvswitch.h
> index 94066f87e9ee..fa13bce15fae 100644
> --- a/include/uapi/linux/openvswitch.h
> +++ b/include/uapi/linux/openvswitch.h
> @@ -126,6 +126,11 @@ struct ovs_vport_stats {
>  	__u64   tx_dropped;		/* no space available in linux  */
>  };
>  
> +struct ovs_vport_upcall_stats {
> +	uint64_t   upcall_success;	/* total packets upcalls succeed */
> +	uint64_t   upcall_fail;		/* total packets upcalls failed  */

Please no uint64_t int the UAPI headers. __u64 as above.  --Yes !

> +};
> +
>  /* Allow last Netlink attribute to be unaligned */
>  #define OVS_DP_F_UNALIGNED	(1 << 0)
>  
> @@ -277,11 +282,25 @@ enum ovs_vport_attr {
>  	OVS_VPORT_ATTR_PAD,
>  	OVS_VPORT_ATTR_IFINDEX,
>  	OVS_VPORT_ATTR_NETNSID,
> +	OVS_VPORT_ATTR_UPCALL_STATS, /* struct ovs_vport_upcall_stats */
>  	__OVS_VPORT_ATTR_MAX
>  };
>  
>  #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
>  
> +/**
> + * enum ovs_vport_upcall_attr - attributes for %OVS_VPORT_UPCALL* 
> +commands
> + * @OVS_VPORT_UPCALL_SUCCESS: 64-bit upcall success packets.
> + * @OVS_VPORT_UPCALL_FAIL: 64-bit upcall fail packets.
> + */
> +enum ovs_vport_upcall_attr {
> +	OVS_VPORT_UPCALL_SUCCESS, /* 64-bit upcall success packets */
> +	OVS_VPORT_UPCALL_FAIL, /* 64-bit upcall fail packets */
> +	__OVS_VPORT_UPCALL_MAX
> +};
> +
> +#define OVS_VPORT_UPCALL_MAX (__OVS_VPORT_UPCALL_MAX-1)

Spaces around arithm operator ('-'). 	 --Yes !

> +
>  enum {
>  	OVS_VXLAN_EXT_UNSPEC,
>  	OVS_VXLAN_EXT_GBP,	/* Flag or __u32 */
> diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c 
> index c8a9075ddd0a..5254c51cfa60 100644
> --- a/net/openvswitch/datapath.c
> +++ b/net/openvswitch/datapath.c
> @@ -209,6 +209,25 @@ static struct vport *new_vport(const struct vport_parms *parms)
>  	return vport;
>  }
>  
> +static void ovs_vport_upcalls(struct sk_buff *skb,
> +			      const struct dp_upcall_info *upcall_info,
> +			      bool upcall_success)

                              ^^^^^^^^^^^^^^^^^^^

Just `bool success`? It's clear that is's about upcalls, I don't see a need to repeat it in every argument's name.
 --Yes !
> +{
> +	if (upcall_info->cmd == OVS_PACKET_CMD_MISS ||
> +	    upcall_info->cmd == OVS_PACKET_CMD_ACTION) {

	if (cmd != MISS && cmd != ACTION)
		return;

Saves 1 indent level. --you are right!

> +		const struct vport *p = OVS_CB(skb)->input_vport;
> +		struct vport_upcall_stats_percpu *vport_stats;
> +
> +		vport_stats = this_cpu_ptr(p->vport_upcall_stats_percpu);

Why make a separate structure? You can just expand dp_stats_percpu, this function would then be just a couple lines in ovs_dp_upcall().
-- emm, beacause of this statistics based on vport, so new structure should insert to "struct vport"


> +		u64_stats_update_begin(&vport_stats->syncp);
> +		if (upcall_success)
> +			u64_stats_inc(&vport_stats->n_upcall_success);
> +		else
> +			u64_stats_inc(&vport_stats->n_upcall_fail);
> +		u64_stats_update_end(&vport_stats->syncp);
> +	}
> +}
> +
>  void ovs_dp_detach_port(struct vport *p)  {
>  	ASSERT_OVSL();
> @@ -216,6 +235,9 @@ 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->vport_upcall_stats_percpu);
> +
>  	/* Then destroy it. */
>  	ovs_vport_del(p);
>  }
> @@ -305,6 +327,8 @@ 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_upcalls(skb, upcall_info, !err);
>  	if (err)
>  		goto err;

Also, as you may see, your ::upcall_fail counter will be always exactly the same as stats->n_lost. So there's no point introducing a new one.
However, you can expand the structure dp_stats_percpu and add a new field there which would store the number of successfull upcalls.
...but I don't see a reason for this to be honest. From my PoV, it's better to count the number of successfully processed packets at the end of queue_userspace_packet() right before the 'out:'
label[0]. But please make sure then you don't duplicate some other counter (I'm not deep into OvS, so can't say for sure if there's anything similar to what you want).
--in ovs ， as stats->n_lost only count the sum of packets of all ports, not on individal port , so expand the structure dp_stats_percpu may be not suitable
--and count upcall failed packets is useful beacuse no all of upcall packets are successfully sent。

>  
> @@ -1825,6 +1849,13 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  		goto err_destroy_portids;
>  	}
>  
> +	vport->vport_upcall_stats_percpu =

This can be at least twice shorter, e.g. 'upcall_stats'. Don't try to describe every detail in symbol names.
--yes!
> +				netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
> +	if (!vport->vport_upcall_stats_percpu) {
> +		err = -ENOMEM;
> +		goto err_destroy_upcall_stats;

I know you followed the previous label logics, but you actually aren't destroying the stats under this label. Here you should have `goto err_destroy_portids` as that's what you're actually doing on that error path.
--here is just keep format of code, and has no influence on function

> +	}
> +
>  	err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
>  				   info->snd_seq, 0, OVS_DP_CMD_NEW);
>  	BUG_ON(err < 0);

[...]

> @@ -2278,6 +2321,14 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  		goto exit_unlock_free;
>  	}
>  
> +	vport->vport_upcall_stats_percpu =
> +		netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
> +
> +	if (!vport->vport_upcall_stats_percpu) {
> +		err = -ENOMEM;
> +		goto exit_unlock_free;
> +	}

Why do you allocate them twice?
-- here is in different code segment on in vport_cmd_new , the other is in dp_cmd_new, they are has no collisions

> +
>  	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);

[...]

> @@ -50,6 +50,18 @@ struct dp_stats_percpu {
>  	struct u64_stats_sync syncp;
>  };
>  
> +/**
> + * struct vport_upcall_stats_percpu - per-cpu packet upcall 
> +statistics for
> + * a given vport.
> + * @n_upcall_success: Number of packets that upcall to userspace succeed.
> + * @n_upcall_fail:    Number of packets that upcall to userspace failed.
> + */
> +struct vport_upcall_stats_percpu {
> +	u64_stats_t n_upcall_success;
> +	u64_stats_t n_upcall_fail;
> +	struct u64_stats_sync syncp;

Nit: syncp would feel better at the start. You could then sort the structure by the field hit probability and reduce cache misses %)
--ok

> +};
> +
>  /**
>   * struct dp_nlsk_pids - array of netlink portids of for a datapath.
>   *                       This is used when OVS_DP_F_DISPATCH_UPCALL_PER_CPU
> diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index 
> 82a74f998966..a69c9356b57c 100644
> --- a/net/openvswitch/vport.c
> +++ b/net/openvswitch/vport.c
> @@ -284,6 +284,54 @@ void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
>  	stats->tx_packets = dev_stats->tx_packets;  }
>  
> +/**
> + *	ovs_vport_get_upcall_stats - retrieve upcall stats
> + *
> + * @vport: vport from which to retrieve the stats
> + * @ovs_vport_upcall_stats: location to store stats
> + *
> + * Retrieves upcall stats for the given device.
> + *
> + * Must be called with ovs_mutex or rcu_read_lock.
> + */
> +void ovs_vport_get_upcall_stats(struct vport *vport, struct 
> +ovs_vport_upcall_stats *stats) {
> +	int i;
> +
> +	stats->upcall_success = 0;
> +	stats->upcall_fail = 0;
> +
> +	for_each_possible_cpu(i) {
> +		const struct vport_upcall_stats_percpu *percpu_upcall_stats;

You wouldn't need to linewrap the lines below if you didn't make its name so huge.
--you are right， i  would change the name!
> +		unsigned int start;
> +
> +		percpu_upcall_stats = per_cpu_ptr(vport->vport_upcall_stats_percpu, i);
> +		do {
> +			start = u64_stats_fetch_begin(&percpu_upcall_stats->syncp);
> +			stats->upcall_success +=
> +				u64_stats_read(&percpu_upcall_stats->n_upcall_success);
> +			stats->upcall_fail += u64_stats_read(&percpu_upcall_stats->n_upcall_fail);
> +		} while (u64_stats_fetch_retry(&percpu_upcall_stats->syncp, start));
> +	}
> +}
> +
> +int ovs_vport_put_upcall_stats(struct sk_buff *skb,
> +			       struct ovs_vport_upcall_stats *stats) {
> +	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_SUCCESS, stats->upcall_success,
> +			      OVS_VPORT_ATTR_PAD))
> +		goto nla_put_failure;
> +
> +	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_FAIL, stats->upcall_fail,
> +			      OVS_VPORT_ATTR_PAD))
> +		goto nla_put_failure;
> +
> +	return 0;
> +
> +nla_put_failure:
> +	return -EMSGSIZE;

goto with only one action makes no sense, just exit directly.
--you are right!
> +}
> +
>  /**
>   *	ovs_vport_get_options - retrieve device options
>   *
> diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h index 
> 7d276f60c000..02cf8c589588 100644
> --- a/net/openvswitch/vport.h
> +++ b/net/openvswitch/vport.h
> @@ -32,6 +32,11 @@ struct vport *ovs_vport_locate(const struct net 
> *net, const char *name);
>  
>  void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
>  
> +void ovs_vport_get_upcall_stats(struct vport *vport,
> +				struct ovs_vport_upcall_stats *stats); int 
> +ovs_vport_put_upcall_stats(struct sk_buff *skb,
> +			       struct ovs_vport_upcall_stats *stats);
> +
>  int ovs_vport_set_options(struct vport *, struct nlattr *options);  
> int ovs_vport_get_options(const struct vport *, struct sk_buff *);
>  
> @@ -78,6 +83,7 @@ struct vport {
>  	struct hlist_node hash_node;
>  	struct hlist_node dp_hash_node;
>  	const struct vport_ops *ops;
> +	struct vport_upcall_stats_percpu __percpu 
> +*vport_upcall_stats_percpu;

Almost 80 columns in one field definition :D
--yes i would change the name !

>  
>  	struct list_head detach_list;
>  	struct rcu_head rcu;
> --
> 2.27.0

[0] https://elixir.bootlin.com/linux/v6.1-rc6/source/net/openvswitch/datapath.c#L557

Thanks,
Olek


^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH] [openvswitch v4] openvswitch: Add support to count upcall packets
@ 2022-11-24  8:32 wangchuanlei
  0 siblings, 0 replies; 11+ messages in thread
From: wangchuanlei @ 2022-11-24  8:32 UTC (permalink / raw)
  To: echaudro, alexandr.lobakin
  Cc: pabeni, pshelar, davem, edumazet, kuba, wangpeihui, netdev, dev,
	linux-kernel, wangchuanlei

Thank you for review ,Eelco Chaudron,
I will a new version of this patch soon based on comments of you and Alexander.

Best regards!
wangchuanlei


On 23 Nov 2022, at 10:18, wangchuanlei wrote:

> Add support to count upall packets, when kmod of openvswitch upcall to 
> userspace , here count the number of packets for upcall succeed and 
> failed, which is a better way to see how many packets upcalled to 
> userspace(ovs-vswitchd) on every interfaces.
>
> Here optimize the function used by comments of v3.
>
> Changes since v3:
> - use nested NLA_NESTED attribute in netlink message
>
> Changes since v2:
> - add count of upcall failed packets
>
> Changes since v1:
> - add count of upcall succeed packets

There is already a review from Alexander, so I only commented on some things that caught my attention after glazing over the patch.
I will do a full review of the next revisions.

//Eelco


> Signed-off-by: wangchuanlei <wangchuanlei@inspur.com>
> ---
>  include/uapi/linux/openvswitch.h | 19 ++++++++++++
>  net/openvswitch/datapath.c       | 52 ++++++++++++++++++++++++++++++++
>  net/openvswitch/datapath.h       | 12 ++++++++
>  net/openvswitch/vport.c          | 48 +++++++++++++++++++++++++++++
>  net/openvswitch/vport.h          |  6 ++++
>  5 files changed, 137 insertions(+)
>
> diff --git a/include/uapi/linux/openvswitch.h 
> b/include/uapi/linux/openvswitch.h
> index 94066f87e9ee..fa13bce15fae 100644
> --- a/include/uapi/linux/openvswitch.h
> +++ b/include/uapi/linux/openvswitch.h
> @@ -126,6 +126,11 @@ struct ovs_vport_stats {
>  	__u64   tx_dropped;		/* no space available in linux  */
>  };
>
> +struct ovs_vport_upcall_stats {
> +	uint64_t   upcall_success;	/* total packets upcalls succeed */
> +	uint64_t   upcall_fail;		/* total packets upcalls failed  */
> +};

This is no longer a user API data structure, so it should be removed from this include.

> +
>  /* Allow last Netlink attribute to be unaligned */
>  #define OVS_DP_F_UNALIGNED	(1 << 0)
>
> @@ -277,11 +282,25 @@ enum ovs_vport_attr {
>  	OVS_VPORT_ATTR_PAD,
>  	OVS_VPORT_ATTR_IFINDEX,
>  	OVS_VPORT_ATTR_NETNSID,
> +	OVS_VPORT_ATTR_UPCALL_STATS, /* struct ovs_vport_upcall_stats */
>  	__OVS_VPORT_ATTR_MAX
>  };
>
>  #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
>
> +/**
> + * enum ovs_vport_upcall_attr - attributes for %OVS_VPORT_UPCALL* 
> +commands
> + * @OVS_VPORT_UPCALL_SUCCESS: 64-bit upcall success packets.
> + * @OVS_VPORT_UPCALL_FAIL: 64-bit upcall fail packets.
> + */
> +enum ovs_vport_upcall_attr {
> +	OVS_VPORT_UPCALL_SUCCESS, /* 64-bit upcall success packets */
> +	OVS_VPORT_UPCALL_FAIL, /* 64-bit upcall fail packets */
> +	__OVS_VPORT_UPCALL_MAX
> +};

Here you have comments ending with and without a dot (.), maybe make it uniform.
Maybe the comment on the structure can be removed as they are explained right above?


> +
> +#define OVS_VPORT_UPCALL_MAX (__OVS_VPORT_UPCALL_MAX-1)
> +
>  enum {
>  	OVS_VXLAN_EXT_UNSPEC,
>  	OVS_VXLAN_EXT_GBP,	/* Flag or __u32 */
> diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c 
> index c8a9075ddd0a..5254c51cfa60 100644
> --- a/net/openvswitch/datapath.c
> +++ b/net/openvswitch/datapath.c
> @@ -209,6 +209,25 @@ static struct vport *new_vport(const struct vport_parms *parms)
>  	return vport;
>  }
>
> +static void ovs_vport_upcalls(struct sk_buff *skb,
> +			      const struct dp_upcall_info *upcall_info,
> +			      bool upcall_success)
> +{
> +	if (upcall_info->cmd == OVS_PACKET_CMD_MISS ||
> +	    upcall_info->cmd == OVS_PACKET_CMD_ACTION) {
> +		const struct vport *p = OVS_CB(skb)->input_vport;
> +		struct vport_upcall_stats_percpu *vport_stats;
> +
> +		vport_stats = this_cpu_ptr(p->vport_upcall_stats_percpu);
> +		u64_stats_update_begin(&vport_stats->syncp);
> +		if (upcall_success)
> +			u64_stats_inc(&vport_stats->n_upcall_success);
> +		else
> +			u64_stats_inc(&vport_stats->n_upcall_fail);
> +		u64_stats_update_end(&vport_stats->syncp);
> +	}
> +}
> +
>  void ovs_dp_detach_port(struct vport *p)  {
>  	ASSERT_OVSL();
> @@ -216,6 +235,9 @@ 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->vport_upcall_stats_percpu);
> +
>  	/* Then destroy it. */
>  	ovs_vport_del(p);
>  }
> @@ -305,6 +327,8 @@ 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_upcalls(skb, upcall_info, !err);
>  	if (err)
>  		goto err;
>
> @@ -1825,6 +1849,13 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  		goto err_destroy_portids;
>  	}
>
> +	vport->vport_upcall_stats_percpu =
> +				netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
> +	if (!vport->vport_upcall_stats_percpu) {
> +		err = -ENOMEM;
> +		goto err_destroy_upcall_stats;
> +	}
> +
>  	err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
>  				   info->snd_seq, 0, OVS_DP_CMD_NEW);
>  	BUG_ON(err < 0);
> @@ -1837,6 +1868,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  	ovs_notify(&dp_datapath_genl_family, reply, info);
>  	return 0;
>
> +err_destroy_upcall_stats:
>  err_destroy_portids:
>  	kfree(rcu_dereference_raw(dp->upcall_portids));
>  err_unlock_and_destroy_meters:
> @@ -2068,6 +2100,8 @@ static int ovs_vport_cmd_fill_info(struct vport 
> *vport, struct sk_buff *skb,  {
>  	struct ovs_header *ovs_header;
>  	struct ovs_vport_stats vport_stats;
> +	struct ovs_vport_upcall_stats stat;
> +	struct nlattr *nla;
>  	int err;
>
>  	ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, @@ 
> -2097,6 +2131,15 @@ static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
>  			  OVS_VPORT_ATTR_PAD))
>  		goto nla_put_failure;
>
> +	nla = nla_nest_start_noflag(skb, OVS_VPORT_ATTR_UPCALL_STATS);
> +	if (!nla)
> +		goto nla_put_failure;
> +
> +	ovs_vport_get_upcall_stats(vport, &stat);
> +	if (ovs_vport_put_upcall_stats(skb, &stat))
> +		goto nla_put_failure;
> +	nla_nest_end(skb, nla);
> +
>  	if (ovs_vport_get_upcall_portids(vport, skb))
>  		goto nla_put_failure;
>
> @@ -2278,6 +2321,14 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  		goto exit_unlock_free;
>  	}
>
> +	vport->vport_upcall_stats_percpu =
> +		netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
> +
> +	if (!vport->vport_upcall_stats_percpu) {
> +		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); @@ -2507,6 +2558,7 @@ 
> 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/datapath.h b/net/openvswitch/datapath.h index 
> 0cd29971a907..933dec5e4175 100644
> --- a/net/openvswitch/datapath.h
> +++ b/net/openvswitch/datapath.h
> @@ -50,6 +50,18 @@ struct dp_stats_percpu {
>  	struct u64_stats_sync syncp;
>  };
>
> +/**
> + * struct vport_upcall_stats_percpu - per-cpu packet upcall 
> +statistics for
> + * a given vport.
> + * @n_upcall_success: Number of packets that upcall to userspace succeed.
> + * @n_upcall_fail:    Number of packets that upcall to userspace failed.
> + */
> +struct vport_upcall_stats_percpu {
> +	u64_stats_t n_upcall_success;
> +	u64_stats_t n_upcall_fail;
> +	struct u64_stats_sync syncp;
> +};
> +
>  /**
>   * struct dp_nlsk_pids - array of netlink portids of for a datapath.
>   *                       This is used when OVS_DP_F_DISPATCH_UPCALL_PER_CPU
> diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index 
> 82a74f998966..a69c9356b57c 100644
> --- a/net/openvswitch/vport.c
> +++ b/net/openvswitch/vport.c
> @@ -284,6 +284,54 @@ void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
>  	stats->tx_packets = dev_stats->tx_packets;  }
>
> +/**
> + *	ovs_vport_get_upcall_stats - retrieve upcall stats
> + *
> + * @vport: vport from which to retrieve the stats
> + * @ovs_vport_upcall_stats: location to store stats
> + *
> + * Retrieves upcall stats for the given device.
> + *
> + * Must be called with ovs_mutex or rcu_read_lock.
> + */
> +void ovs_vport_get_upcall_stats(struct vport *vport, struct 
> +ovs_vport_upcall_stats *stats) {
> +	int i;
> +
> +	stats->upcall_success = 0;
> +	stats->upcall_fail = 0;
> +
> +	for_each_possible_cpu(i) {
> +		const struct vport_upcall_stats_percpu *percpu_upcall_stats;
> +		unsigned int start;
> +
> +		percpu_upcall_stats = per_cpu_ptr(vport->vport_upcall_stats_percpu, i);
> +		do {
> +			start = u64_stats_fetch_begin(&percpu_upcall_stats->syncp);
> +			stats->upcall_success +=
> +				u64_stats_read(&percpu_upcall_stats->n_upcall_success);
> +			stats->upcall_fail += u64_stats_read(&percpu_upcall_stats->n_upcall_fail);
> +		} while (u64_stats_fetch_retry(&percpu_upcall_stats->syncp, start));
> +	}
> +}
> +
> +int ovs_vport_put_upcall_stats(struct sk_buff *skb,
> +			       struct ovs_vport_upcall_stats *stats) {
> +	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_SUCCESS, stats->upcall_success,
> +			      OVS_VPORT_ATTR_PAD))
> +		goto nla_put_failure;
> +
> +	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_FAIL, stats->upcall_fail,
> +			      OVS_VPORT_ATTR_PAD))
> +		goto nla_put_failure;
> +
> +	return 0;
> +
> +nla_put_failure:
> +	return -EMSGSIZE;
> +}
> +
>  /**
>   *	ovs_vport_get_options - retrieve device options
>   *
> diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h index 
> 7d276f60c000..02cf8c589588 100644
> --- a/net/openvswitch/vport.h
> +++ b/net/openvswitch/vport.h
> @@ -32,6 +32,11 @@ struct vport *ovs_vport_locate(const struct net 
> *net, const char *name);
>
>  void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
>
> +void ovs_vport_get_upcall_stats(struct vport *vport,
> +				struct ovs_vport_upcall_stats *stats); int 
> +ovs_vport_put_upcall_stats(struct sk_buff *skb,
> +			       struct ovs_vport_upcall_stats *stats);
> +
>  int ovs_vport_set_options(struct vport *, struct nlattr *options);  
> int ovs_vport_get_options(const struct vport *, struct sk_buff *);
>
> @@ -78,6 +83,7 @@ struct vport {
>  	struct hlist_node hash_node;
>  	struct hlist_node dp_hash_node;
>  	const struct vport_ops *ops;
> +	struct vport_upcall_stats_percpu __percpu 
> +*vport_upcall_stats_percpu;
>
>  	struct list_head detach_list;
>  	struct rcu_head rcu;
> --
> 2.27.0


^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH] [openvswitch v4] openvswitch: Add support to count upcall packets
@ 2022-11-30  6:12 wangchuanlei
  0 siblings, 0 replies; 11+ messages in thread
From: wangchuanlei @ 2022-11-30  6:12 UTC (permalink / raw)
  To: echaudro
  Cc: wangpeihui, alexandr.lobakin, pabeni, pshelar, davem, edumazet,
	kuba, netdev, dev, linux-kernel

Hi,Eelco Chaudron

> +struct ovs_vport_upcall_stats {
> +     uint64_t   upcall_success;      /* total packets upcalls succeed */
> +     uint64_t   upcall_fail;         /* total packets upcalls failed  */
> +};

This is no longer a user API data structure, so it should be removed from this include.
--This structure will used in userspace, ovs-vswitchd will use it.
 -- and that will be another patch of ovs-vswitchd. so it keep it here ?


>Thank you for review ,Eelco Chaudron,
>I will a new version of this patch soon based on comments of you and Alexander.

Best regards!
wangchuanlei


On 23 Nov 2022, at 10:18, wangchuanlei wrote:

> Add support to count upall packets, when kmod of openvswitch upcall to 
> userspace , here count the number of packets for upcall succeed and 
> failed, which is a better way to see how many packets upcalled to 
> userspace(ovs-vswitchd) on every interfaces.
>
> Here optimize the function used by comments of v3.
>
> Changes since v3:
> - use nested NLA_NESTED attribute in netlink message
>
> Changes since v2:
> - add count of upcall failed packets
>
> Changes since v1:
> - add count of upcall succeed packets

There is already a review from Alexander, so I only commented on some things that caught my attention after glazing over the patch.
I will do a full review of the next revisions.

//Eelco


> Signed-off-by: wangchuanlei <wangchuanlei@inspur.com>
> ---
>  include/uapi/linux/openvswitch.h | 19 ++++++++++++
>  net/openvswitch/datapath.c       | 52 ++++++++++++++++++++++++++++++++
>  net/openvswitch/datapath.h       | 12 ++++++++
>  net/openvswitch/vport.c          | 48 +++++++++++++++++++++++++++++
>  net/openvswitch/vport.h          |  6 ++++
>  5 files changed, 137 insertions(+)
>
> diff --git a/include/uapi/linux/openvswitch.h 
> b/include/uapi/linux/openvswitch.h
> index 94066f87e9ee..fa13bce15fae 100644
> --- a/include/uapi/linux/openvswitch.h
> +++ b/include/uapi/linux/openvswitch.h
> @@ -126,6 +126,11 @@ struct ovs_vport_stats {
>  	__u64   tx_dropped;		/* no space available in linux  */
>  };
>
> +struct ovs_vport_upcall_stats {
> +	uint64_t   upcall_success;	/* total packets upcalls succeed */
> +	uint64_t   upcall_fail;		/* total packets upcalls failed  */
> +};

This is no longer a user API data structure, so it should be removed from this include.

> +
>  /* Allow last Netlink attribute to be unaligned */
>  #define OVS_DP_F_UNALIGNED	(1 << 0)
>
> @@ -277,11 +282,25 @@ enum ovs_vport_attr {
>  	OVS_VPORT_ATTR_PAD,
>  	OVS_VPORT_ATTR_IFINDEX,
>  	OVS_VPORT_ATTR_NETNSID,
> +	OVS_VPORT_ATTR_UPCALL_STATS, /* struct ovs_vport_upcall_stats */
>  	__OVS_VPORT_ATTR_MAX
>  };
>
>  #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
>
> +/**
> + * enum ovs_vport_upcall_attr - attributes for %OVS_VPORT_UPCALL* 
> +commands
> + * @OVS_VPORT_UPCALL_SUCCESS: 64-bit upcall success packets.
> + * @OVS_VPORT_UPCALL_FAIL: 64-bit upcall fail packets.
> + */
> +enum ovs_vport_upcall_attr {
> +	OVS_VPORT_UPCALL_SUCCESS, /* 64-bit upcall success packets */
> +	OVS_VPORT_UPCALL_FAIL, /* 64-bit upcall fail packets */
> +	__OVS_VPORT_UPCALL_MAX
> +};

Here you have comments ending with and without a dot (.), maybe make it uniform.
Maybe the comment on the structure can be removed as they are explained right above?


> +
> +#define OVS_VPORT_UPCALL_MAX (__OVS_VPORT_UPCALL_MAX-1)
> +
>  enum {
>  	OVS_VXLAN_EXT_UNSPEC,
>  	OVS_VXLAN_EXT_GBP,	/* Flag or __u32 */
> diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c 
> index c8a9075ddd0a..5254c51cfa60 100644
> --- a/net/openvswitch/datapath.c
> +++ b/net/openvswitch/datapath.c
> @@ -209,6 +209,25 @@ static struct vport *new_vport(const struct vport_parms *parms)
>  	return vport;
>  }
>
> +static void ovs_vport_upcalls(struct sk_buff *skb,
> +			      const struct dp_upcall_info *upcall_info,
> +			      bool upcall_success)
> +{
> +	if (upcall_info->cmd == OVS_PACKET_CMD_MISS ||
> +	    upcall_info->cmd == OVS_PACKET_CMD_ACTION) {
> +		const struct vport *p = OVS_CB(skb)->input_vport;
> +		struct vport_upcall_stats_percpu *vport_stats;
> +
> +		vport_stats = this_cpu_ptr(p->vport_upcall_stats_percpu);
> +		u64_stats_update_begin(&vport_stats->syncp);
> +		if (upcall_success)
> +			u64_stats_inc(&vport_stats->n_upcall_success);
> +		else
> +			u64_stats_inc(&vport_stats->n_upcall_fail);
> +		u64_stats_update_end(&vport_stats->syncp);
> +	}
> +}
> +
>  void ovs_dp_detach_port(struct vport *p)  {
>  	ASSERT_OVSL();
> @@ -216,6 +235,9 @@ 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->vport_upcall_stats_percpu);
> +
>  	/* Then destroy it. */
>  	ovs_vport_del(p);
>  }
> @@ -305,6 +327,8 @@ 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_upcalls(skb, upcall_info, !err);
>  	if (err)
>  		goto err;
>
> @@ -1825,6 +1849,13 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  		goto err_destroy_portids;
>  	}
>
> +	vport->vport_upcall_stats_percpu =
> +				netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
> +	if (!vport->vport_upcall_stats_percpu) {
> +		err = -ENOMEM;
> +		goto err_destroy_upcall_stats;
> +	}
> +
>  	err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
>  				   info->snd_seq, 0, OVS_DP_CMD_NEW);
>  	BUG_ON(err < 0);
> @@ -1837,6 +1868,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  	ovs_notify(&dp_datapath_genl_family, reply, info);
>  	return 0;
>
> +err_destroy_upcall_stats:
>  err_destroy_portids:
>  	kfree(rcu_dereference_raw(dp->upcall_portids));
>  err_unlock_and_destroy_meters:
> @@ -2068,6 +2100,8 @@ static int ovs_vport_cmd_fill_info(struct vport 
> *vport, struct sk_buff *skb,  {
>  	struct ovs_header *ovs_header;
>  	struct ovs_vport_stats vport_stats;
> +	struct ovs_vport_upcall_stats stat;
> +	struct nlattr *nla;
>  	int err;
>
>  	ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, @@ 
> -2097,6 +2131,15 @@ static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
>  			  OVS_VPORT_ATTR_PAD))
>  		goto nla_put_failure;
>
> +	nla = nla_nest_start_noflag(skb, OVS_VPORT_ATTR_UPCALL_STATS);
> +	if (!nla)
> +		goto nla_put_failure;
> +
> +	ovs_vport_get_upcall_stats(vport, &stat);
> +	if (ovs_vport_put_upcall_stats(skb, &stat))
> +		goto nla_put_failure;
> +	nla_nest_end(skb, nla);
> +
>  	if (ovs_vport_get_upcall_portids(vport, skb))
>  		goto nla_put_failure;
>
> @@ -2278,6 +2321,14 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  		goto exit_unlock_free;
>  	}
>
> +	vport->vport_upcall_stats_percpu =
> +		netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
> +
> +	if (!vport->vport_upcall_stats_percpu) {
> +		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); @@ -2507,6 +2558,7 @@ 
> 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/datapath.h b/net/openvswitch/datapath.h index 
> 0cd29971a907..933dec5e4175 100644
> --- a/net/openvswitch/datapath.h
> +++ b/net/openvswitch/datapath.h
> @@ -50,6 +50,18 @@ struct dp_stats_percpu {
>  	struct u64_stats_sync syncp;
>  };
>
> +/**
> + * struct vport_upcall_stats_percpu - per-cpu packet upcall 
> +statistics for
> + * a given vport.
> + * @n_upcall_success: Number of packets that upcall to userspace succeed.
> + * @n_upcall_fail:    Number of packets that upcall to userspace failed.
> + */
> +struct vport_upcall_stats_percpu {
> +	u64_stats_t n_upcall_success;
> +	u64_stats_t n_upcall_fail;
> +	struct u64_stats_sync syncp;
> +};
> +
>  /**
>   * struct dp_nlsk_pids - array of netlink portids of for a datapath.
>   *                       This is used when OVS_DP_F_DISPATCH_UPCALL_PER_CPU
> diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index 
> 82a74f998966..a69c9356b57c 100644
> --- a/net/openvswitch/vport.c
> +++ b/net/openvswitch/vport.c
> @@ -284,6 +284,54 @@ void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
>  	stats->tx_packets = dev_stats->tx_packets;  }
>
> +/**
> + *	ovs_vport_get_upcall_stats - retrieve upcall stats
> + *
> + * @vport: vport from which to retrieve the stats
> + * @ovs_vport_upcall_stats: location to store stats
> + *
> + * Retrieves upcall stats for the given device.
> + *
> + * Must be called with ovs_mutex or rcu_read_lock.
> + */
> +void ovs_vport_get_upcall_stats(struct vport *vport, struct 
> +ovs_vport_upcall_stats *stats) {
> +	int i;
> +
> +	stats->upcall_success = 0;
> +	stats->upcall_fail = 0;
> +
> +	for_each_possible_cpu(i) {
> +		const struct vport_upcall_stats_percpu *percpu_upcall_stats;
> +		unsigned int start;
> +
> +		percpu_upcall_stats = per_cpu_ptr(vport->vport_upcall_stats_percpu, i);
> +		do {
> +			start = u64_stats_fetch_begin(&percpu_upcall_stats->syncp);
> +			stats->upcall_success +=
> +				u64_stats_read(&percpu_upcall_stats->n_upcall_success);
> +			stats->upcall_fail += u64_stats_read(&percpu_upcall_stats->n_upcall_fail);
> +		} while (u64_stats_fetch_retry(&percpu_upcall_stats->syncp, start));
> +	}
> +}
> +
> +int ovs_vport_put_upcall_stats(struct sk_buff *skb,
> +			       struct ovs_vport_upcall_stats *stats) {
> +	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_SUCCESS, stats->upcall_success,
> +			      OVS_VPORT_ATTR_PAD))
> +		goto nla_put_failure;
> +
> +	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_FAIL, stats->upcall_fail,
> +			      OVS_VPORT_ATTR_PAD))
> +		goto nla_put_failure;
> +
> +	return 0;
> +
> +nla_put_failure:
> +	return -EMSGSIZE;
> +}
> +
>  /**
>   *	ovs_vport_get_options - retrieve device options
>   *
> diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h index 
> 7d276f60c000..02cf8c589588 100644
> --- a/net/openvswitch/vport.h
> +++ b/net/openvswitch/vport.h
> @@ -32,6 +32,11 @@ struct vport *ovs_vport_locate(const struct net 
> *net, const char *name);
>
>  void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
>
> +void ovs_vport_get_upcall_stats(struct vport *vport,
> +				struct ovs_vport_upcall_stats *stats); int 
> +ovs_vport_put_upcall_stats(struct sk_buff *skb,
> +			       struct ovs_vport_upcall_stats *stats);
> +
>  int ovs_vport_set_options(struct vport *, struct nlattr *options);  
> int ovs_vport_get_options(const struct vport *, struct sk_buff *);
>
> @@ -78,6 +83,7 @@ struct vport {
>  	struct hlist_node hash_node;
>  	struct hlist_node dp_hash_node;
>  	const struct vport_ops *ops;
> +	struct vport_upcall_stats_percpu __percpu 
> +*vport_upcall_stats_percpu;
>
>  	struct list_head detach_list;
>  	struct rcu_head rcu;
> --
> 2.27.0


^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH] [openvswitch v4] openvswitch: Add support to count upcall packets
@ 2022-11-30  6:15 wangchuanlei
  0 siblings, 0 replies; 11+ messages in thread
From: wangchuanlei @ 2022-11-30  6:15 UTC (permalink / raw)
  To: echaudro
  Cc: wangpeihui, alexandr.lobakin, pabeni, pshelar, davem, edumazet,
	kuba, netdev, dev, linux-kernel

Hi,Eelco Chaudron

> +struct ovs_vport_upcall_stats {
> +     uint64_t   upcall_success;      /* total packets upcalls succeed */
> +     uint64_t   upcall_fail;         /* total packets upcalls failed  */
> +};

This is no longer a user API data structure, so it should be removed from this include.
--This structure will used in userspace, ovs-vswitchd will use it.
 -- and that will be another patch of ovs-vswitchd. so it keep it here ?


>Thank you for review ,Eelco Chaudron,
>I will a new version of this patch soon based on comments of you and Alexander.

Best regards!
wangchuanlei


On 23 Nov 2022, at 10:18, wangchuanlei wrote:

> Add support to count upall packets, when kmod of openvswitch upcall to 
> userspace , here count the number of packets for upcall succeed and 
> failed, which is a better way to see how many packets upcalled to 
> userspace(ovs-vswitchd) on every interfaces.
>
> Here optimize the function used by comments of v3.
>
> Changes since v3:
> - use nested NLA_NESTED attribute in netlink message
>
> Changes since v2:
> - add count of upcall failed packets
>
> Changes since v1:
> - add count of upcall succeed packets

There is already a review from Alexander, so I only commented on some things that caught my attention after glazing over the patch.
I will do a full review of the next revisions.

//Eelco


> Signed-off-by: wangchuanlei <wangchuanlei@inspur.com>
> ---
>  include/uapi/linux/openvswitch.h | 19 ++++++++++++
>  net/openvswitch/datapath.c       | 52 ++++++++++++++++++++++++++++++++
>  net/openvswitch/datapath.h       | 12 ++++++++
>  net/openvswitch/vport.c          | 48 +++++++++++++++++++++++++++++
>  net/openvswitch/vport.h          |  6 ++++
>  5 files changed, 137 insertions(+)
>
> diff --git a/include/uapi/linux/openvswitch.h 
> b/include/uapi/linux/openvswitch.h
> index 94066f87e9ee..fa13bce15fae 100644
> --- a/include/uapi/linux/openvswitch.h
> +++ b/include/uapi/linux/openvswitch.h
> @@ -126,6 +126,11 @@ struct ovs_vport_stats {
>  	__u64   tx_dropped;		/* no space available in linux  */
>  };
>
> +struct ovs_vport_upcall_stats {
> +	uint64_t   upcall_success;	/* total packets upcalls succeed */
> +	uint64_t   upcall_fail;		/* total packets upcalls failed  */
> +};

This is no longer a user API data structure, so it should be removed from this include.

> +
>  /* Allow last Netlink attribute to be unaligned */
>  #define OVS_DP_F_UNALIGNED	(1 << 0)
>
> @@ -277,11 +282,25 @@ enum ovs_vport_attr {
>  	OVS_VPORT_ATTR_PAD,
>  	OVS_VPORT_ATTR_IFINDEX,
>  	OVS_VPORT_ATTR_NETNSID,
> +	OVS_VPORT_ATTR_UPCALL_STATS, /* struct ovs_vport_upcall_stats */
>  	__OVS_VPORT_ATTR_MAX
>  };
>
>  #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
>
> +/**
> + * enum ovs_vport_upcall_attr - attributes for %OVS_VPORT_UPCALL* 
> +commands
> + * @OVS_VPORT_UPCALL_SUCCESS: 64-bit upcall success packets.
> + * @OVS_VPORT_UPCALL_FAIL: 64-bit upcall fail packets.
> + */
> +enum ovs_vport_upcall_attr {
> +	OVS_VPORT_UPCALL_SUCCESS, /* 64-bit upcall success packets */
> +	OVS_VPORT_UPCALL_FAIL, /* 64-bit upcall fail packets */
> +	__OVS_VPORT_UPCALL_MAX
> +};

Here you have comments ending with and without a dot (.), maybe make it uniform.
Maybe the comment on the structure can be removed as they are explained right above?


> +
> +#define OVS_VPORT_UPCALL_MAX (__OVS_VPORT_UPCALL_MAX-1)
> +
>  enum {
>  	OVS_VXLAN_EXT_UNSPEC,
>  	OVS_VXLAN_EXT_GBP,	/* Flag or __u32 */
> diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c 
> index c8a9075ddd0a..5254c51cfa60 100644
> --- a/net/openvswitch/datapath.c
> +++ b/net/openvswitch/datapath.c
> @@ -209,6 +209,25 @@ static struct vport *new_vport(const struct vport_parms *parms)
>  	return vport;
>  }
>
> +static void ovs_vport_upcalls(struct sk_buff *skb,
> +			      const struct dp_upcall_info *upcall_info,
> +			      bool upcall_success)
> +{
> +	if (upcall_info->cmd == OVS_PACKET_CMD_MISS ||
> +	    upcall_info->cmd == OVS_PACKET_CMD_ACTION) {
> +		const struct vport *p = OVS_CB(skb)->input_vport;
> +		struct vport_upcall_stats_percpu *vport_stats;
> +
> +		vport_stats = this_cpu_ptr(p->vport_upcall_stats_percpu);
> +		u64_stats_update_begin(&vport_stats->syncp);
> +		if (upcall_success)
> +			u64_stats_inc(&vport_stats->n_upcall_success);
> +		else
> +			u64_stats_inc(&vport_stats->n_upcall_fail);
> +		u64_stats_update_end(&vport_stats->syncp);
> +	}
> +}
> +
>  void ovs_dp_detach_port(struct vport *p)  {
>  	ASSERT_OVSL();
> @@ -216,6 +235,9 @@ 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->vport_upcall_stats_percpu);
> +
>  	/* Then destroy it. */
>  	ovs_vport_del(p);
>  }
> @@ -305,6 +327,8 @@ 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_upcalls(skb, upcall_info, !err);
>  	if (err)
>  		goto err;
>
> @@ -1825,6 +1849,13 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  		goto err_destroy_portids;
>  	}
>
> +	vport->vport_upcall_stats_percpu =
> +				netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
> +	if (!vport->vport_upcall_stats_percpu) {
> +		err = -ENOMEM;
> +		goto err_destroy_upcall_stats;
> +	}
> +
>  	err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid,
>  				   info->snd_seq, 0, OVS_DP_CMD_NEW);
>  	BUG_ON(err < 0);
> @@ -1837,6 +1868,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  	ovs_notify(&dp_datapath_genl_family, reply, info);
>  	return 0;
>
> +err_destroy_upcall_stats:
>  err_destroy_portids:
>  	kfree(rcu_dereference_raw(dp->upcall_portids));
>  err_unlock_and_destroy_meters:
> @@ -2068,6 +2100,8 @@ static int ovs_vport_cmd_fill_info(struct vport 
> *vport, struct sk_buff *skb,  {
>  	struct ovs_header *ovs_header;
>  	struct ovs_vport_stats vport_stats;
> +	struct ovs_vport_upcall_stats stat;
> +	struct nlattr *nla;
>  	int err;
>
>  	ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, @@ 
> -2097,6 +2131,15 @@ static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
>  			  OVS_VPORT_ATTR_PAD))
>  		goto nla_put_failure;
>
> +	nla = nla_nest_start_noflag(skb, OVS_VPORT_ATTR_UPCALL_STATS);
> +	if (!nla)
> +		goto nla_put_failure;
> +
> +	ovs_vport_get_upcall_stats(vport, &stat);
> +	if (ovs_vport_put_upcall_stats(skb, &stat))
> +		goto nla_put_failure;
> +	nla_nest_end(skb, nla);
> +
>  	if (ovs_vport_get_upcall_portids(vport, skb))
>  		goto nla_put_failure;
>
> @@ -2278,6 +2321,14 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  		goto exit_unlock_free;
>  	}
>
> +	vport->vport_upcall_stats_percpu =
> +		netdev_alloc_pcpu_stats(struct vport_upcall_stats_percpu);
> +
> +	if (!vport->vport_upcall_stats_percpu) {
> +		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); @@ -2507,6 +2558,7 @@ 
> 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/datapath.h b/net/openvswitch/datapath.h index 
> 0cd29971a907..933dec5e4175 100644
> --- a/net/openvswitch/datapath.h
> +++ b/net/openvswitch/datapath.h
> @@ -50,6 +50,18 @@ struct dp_stats_percpu {
>  	struct u64_stats_sync syncp;
>  };
>
> +/**
> + * struct vport_upcall_stats_percpu - per-cpu packet upcall 
> +statistics for
> + * a given vport.
> + * @n_upcall_success: Number of packets that upcall to userspace succeed.
> + * @n_upcall_fail:    Number of packets that upcall to userspace failed.
> + */
> +struct vport_upcall_stats_percpu {
> +	u64_stats_t n_upcall_success;
> +	u64_stats_t n_upcall_fail;
> +	struct u64_stats_sync syncp;
> +};
> +
>  /**
>   * struct dp_nlsk_pids - array of netlink portids of for a datapath.
>   *                       This is used when OVS_DP_F_DISPATCH_UPCALL_PER_CPU
> diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index 
> 82a74f998966..a69c9356b57c 100644
> --- a/net/openvswitch/vport.c
> +++ b/net/openvswitch/vport.c
> @@ -284,6 +284,54 @@ void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
>  	stats->tx_packets = dev_stats->tx_packets;  }
>
> +/**
> + *	ovs_vport_get_upcall_stats - retrieve upcall stats
> + *
> + * @vport: vport from which to retrieve the stats
> + * @ovs_vport_upcall_stats: location to store stats
> + *
> + * Retrieves upcall stats for the given device.
> + *
> + * Must be called with ovs_mutex or rcu_read_lock.
> + */
> +void ovs_vport_get_upcall_stats(struct vport *vport, struct 
> +ovs_vport_upcall_stats *stats) {
> +	int i;
> +
> +	stats->upcall_success = 0;
> +	stats->upcall_fail = 0;
> +
> +	for_each_possible_cpu(i) {
> +		const struct vport_upcall_stats_percpu *percpu_upcall_stats;
> +		unsigned int start;
> +
> +		percpu_upcall_stats = per_cpu_ptr(vport->vport_upcall_stats_percpu, i);
> +		do {
> +			start = u64_stats_fetch_begin(&percpu_upcall_stats->syncp);
> +			stats->upcall_success +=
> +				u64_stats_read(&percpu_upcall_stats->n_upcall_success);
> +			stats->upcall_fail += u64_stats_read(&percpu_upcall_stats->n_upcall_fail);
> +		} while (u64_stats_fetch_retry(&percpu_upcall_stats->syncp, start));
> +	}
> +}
> +
> +int ovs_vport_put_upcall_stats(struct sk_buff *skb,
> +			       struct ovs_vport_upcall_stats *stats) {
> +	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_SUCCESS, stats->upcall_success,
> +			      OVS_VPORT_ATTR_PAD))
> +		goto nla_put_failure;
> +
> +	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_FAIL, stats->upcall_fail,
> +			      OVS_VPORT_ATTR_PAD))
> +		goto nla_put_failure;
> +
> +	return 0;
> +
> +nla_put_failure:
> +	return -EMSGSIZE;
> +}
> +
>  /**
>   *	ovs_vport_get_options - retrieve device options
>   *
> diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h index 
> 7d276f60c000..02cf8c589588 100644
> --- a/net/openvswitch/vport.h
> +++ b/net/openvswitch/vport.h
> @@ -32,6 +32,11 @@ struct vport *ovs_vport_locate(const struct net 
> *net, const char *name);
>
>  void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
>
> +void ovs_vport_get_upcall_stats(struct vport *vport,
> +				struct ovs_vport_upcall_stats *stats); int 
> +ovs_vport_put_upcall_stats(struct sk_buff *skb,
> +			       struct ovs_vport_upcall_stats *stats);
> +
>  int ovs_vport_set_options(struct vport *, struct nlattr *options);  
> int ovs_vport_get_options(const struct vport *, struct sk_buff *);
>
> @@ -78,6 +83,7 @@ struct vport {
>  	struct hlist_node hash_node;
>  	struct hlist_node dp_hash_node;
>  	const struct vport_ops *ops;
> +	struct vport_upcall_stats_percpu __percpu 
> +*vport_upcall_stats_percpu;
>
>  	struct list_head detach_list;
>  	struct rcu_head rcu;
> --
> 2.27.0


^ permalink raw reply	[flat|nested] 11+ messages in thread
* Re: [PATCH] [openvswitch v4] openvswitch: Add support to count upcall packets
@ 2022-11-30  9:12 wangchuanlei
  0 siblings, 0 replies; 11+ messages in thread
From: wangchuanlei @ 2022-11-30  9:12 UTC (permalink / raw)
  To: echaudro, alexandr.lobakin, pabeni, pshelar, davem, edumazet,
	kuba
  Cc: wangpeihui, netdev, dev, linux-kernel

Hi,Eelco Chaudron

> +struct ovs_vport_upcall_stats {
> +     __u64   tx_success;             /* total packets upcalls succeed */
> +     __u64   tx_fail;                /* total packets upcalls failed  */
> +};
> +

=> This is no longer a user API data structure, so it should be removed from this include.
=>  --This structure will used in userspace, ovs-vswitchd will use it.
=>  -- and that will be another patch of ovs-vswitchd. so it keep it here ?

The above was your response to v4. However, as this structure is not part of the UAPI
 from the Linux side, it should not be exposed. If you need a similar structure in OVS one should be defined there.

--Yes, i modified here , v6 will pushed several minutes ,thanks for review!
Best regards!
wangchuanlei

On 30 Nov 2022, at 8:25, wangchuanlei wrote:

> Add support to count upall packets, when kmod of openvswitch upcall to 
> userspace , here count the number of packets for upcall succeed and 
> failed, which is a better way to see how many packets upcalled to 
> userspace(ovs-vswitchd) on every interfaces.
>
> Here modify format of code used by comments of v4.
>
> Changes since v4:
> - optimize the function used by comments
>
> Changes since v3:
> - use nested NLA_NESTED attribute in netlink message
>
> Changes since v2:
> - add count of upcall failed packets
>
> Changes since v1:
> - add count of upcall succeed packets
>
> Signed-off-by: wangchuanlei <wangchuanlei@inspur.com>
> ---
>  include/uapi/linux/openvswitch.h | 19 ++++++++++++
>  net/openvswitch/datapath.c       | 50 ++++++++++++++++++++++++++++++++
>  net/openvswitch/vport.c          | 44 ++++++++++++++++++++++++++++
>  net/openvswitch/vport.h          | 19 ++++++++++++
>  4 files changed, 132 insertions(+)
>
> diff --git a/include/uapi/linux/openvswitch.h 
> b/include/uapi/linux/openvswitch.h
> index 94066f87e9ee..ad7cea9827cc 100644
> --- a/include/uapi/linux/openvswitch.h
> +++ b/include/uapi/linux/openvswitch.h
> @@ -126,6 +126,11 @@ struct ovs_vport_stats {
>  	__u64   tx_dropped;		/* no space available in linux  */
>  };
>
> +struct ovs_vport_upcall_stats {
> +	__u64   tx_success;		/* total packets upcalls succeed */
> +	__u64   tx_fail;		/* total packets upcalls failed  */
> +};
> +

=> This is no longer a user API data structure, so it should be removed from this include.
=>  --This structure will used in userspace, ovs-vswitchd will use it.
=>  -- and that will be another patch of ovs-vswitchd. so it keep it here ?

The above was your response to v4. However, as this structure is not part of the UAPI from the Linux side, it should not be exposed. If you need a similar structure in OVS one should be defined there.


>  /* Allow last Netlink attribute to be unaligned */
>  #define OVS_DP_F_UNALIGNED	(1 << 0)
>
> @@ -277,11 +282,25 @@ enum ovs_vport_attr {
>  	OVS_VPORT_ATTR_PAD,
>  	OVS_VPORT_ATTR_IFINDEX,
>  	OVS_VPORT_ATTR_NETNSID,
> +	OVS_VPORT_ATTR_UPCALL_STATS, /* struct ovs_vport_upcall_stats */
>  	__OVS_VPORT_ATTR_MAX
>  };
>
>  #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
>
> +/**
> + * enum ovs_vport_upcall_attr - attributes for %OVS_VPORT_UPCALL* 
> +commands
> + * @OVS_VPORT_UPCALL_SUCCESS: 64-bit upcall success packets.
> + * @OVS_VPORT_UPCALL_FAIL: 64-bit upcall fail packets.
> + */
> +enum ovs_vport_upcall_attr {
> +	OVS_VPORT_UPCALL_SUCCESS,
> +	OVS_VPORT_UPCALL_FAIL,
> +	__OVS_VPORT_UPCALL_MAX
> +};
> +
> +#define OVS_VPORT_UPCALL_MAX (__OVS_VPORT_UPCALL_MAX - 1)
> +
>  enum {
>  	OVS_VXLAN_EXT_UNSPEC,
>  	OVS_VXLAN_EXT_GBP,	/* Flag or __u32 */
> diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c 
> index c8a9075ddd0a..f9279aee2adb 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_upcalls(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 *vport_stats;
> +
> +	if (upcall_info->cmd != OVS_PACKET_CMD_MISS &&
> +	    upcall_info->cmd != OVS_PACKET_CMD_ACTION)
> +		return;
> +
> +	vport_stats = this_cpu_ptr(p->upcall_stats);
> +	u64_stats_update_begin(&vport_stats->syncp);
> +	if (upcall_result)
> +		u64_stats_inc(&vport_stats->n_success);
> +	else
> +		u64_stats_inc(&vport_stats->n_fail);
> +	u64_stats_update_end(&vport_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_upcalls(skb, upcall_info, !err);
>  	if (err)
>  		goto err;
>
> @@ -1825,6 +1850,12 @@ 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);
> @@ -2068,6 +2099,8 @@ static int ovs_vport_cmd_fill_info(struct vport 
> *vport, struct sk_buff *skb,  {
>  	struct ovs_header *ovs_header;
>  	struct ovs_vport_stats vport_stats;
> +	struct ovs_vport_upcall_stats stat;
> +	struct nlattr *nla;
>  	int err;
>
>  	ovs_header = genlmsg_put(skb, portid, seq, &dp_vport_genl_family, @@ 
> -2097,6 +2130,15 @@ static int ovs_vport_cmd_fill_info(struct vport *vport, struct sk_buff *skb,
>  			  OVS_VPORT_ATTR_PAD))
>  		goto nla_put_failure;
>
> +	nla = nla_nest_start_noflag(skb, OVS_VPORT_ATTR_UPCALL_STATS);
> +	if (!nla)
> +		goto nla_put_failure;
> +
> +	ovs_vport_get_upcall_stats(vport, &stat);
> +	if (ovs_vport_put_upcall_stats(skb, &stat))
> +		goto nla_put_failure;
> +	nla_nest_end(skb, nla);
> +
>  	if (ovs_vport_get_upcall_portids(vport, skb))
>  		goto nla_put_failure;
>
> @@ -2278,6 +2320,13 @@ static int ovs_vport_cmd_new(struct sk_buff *skb, struct genl_info *info)
>  		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); @@ -2507,6 +2556,7 @@ 
> 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..fd95536b35ef 100644
> --- a/net/openvswitch/vport.c
> +++ b/net/openvswitch/vport.c
> @@ -284,6 +284,50 @@ void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
>  	stats->tx_packets = dev_stats->tx_packets;  }
>
> +/**
> + *	ovs_vport_get_upcall_stats - retrieve upcall stats
> + *
> + * @vport: vport from which to retrieve the stats
> + * @ovs_vport_upcall_stats: location to store stats
> + *
> + * Retrieves upcall stats for the given device.
> + *
> + * Must be called with ovs_mutex or rcu_read_lock.
> + */
> +void ovs_vport_get_upcall_stats(struct vport *vport, struct 
> +ovs_vport_upcall_stats *stats) {
> +	int i;
> +
> +	stats->tx_success = 0;
> +	stats->tx_fail = 0;
> +
> +	for_each_possible_cpu(i) {
> +		const struct vport_upcall_stats_percpu *upcall_stats;
> +		unsigned int start;
> +
> +		upcall_stats = per_cpu_ptr(vport->upcall_stats, i);
> +		do {
> +			start = u64_stats_fetch_begin(&upcall_stats->syncp);
> +			stats->tx_success += u64_stats_read(&upcall_stats->n_success);
> +			stats->tx_fail += u64_stats_read(&upcall_stats->n_fail);
> +		} while (u64_stats_fetch_retry(&upcall_stats->syncp, start));
> +	}
> +}
> +
> +int ovs_vport_put_upcall_stats(struct sk_buff *skb,
> +			       struct ovs_vport_upcall_stats *stats) {
> +	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_SUCCESS, stats->tx_success,
> +			      OVS_VPORT_ATTR_PAD))
> +		return -EMSGSIZE;
> +
> +	if (nla_put_u64_64bit(skb, OVS_VPORT_UPCALL_FAIL, stats->tx_fail,
> +			      OVS_VPORT_ATTR_PAD))
> +		return -EMSGSIZE;
> +
> +	return 0;
> +}
> +
>  /**
>   *	ovs_vport_get_options - retrieve device options
>   *
> diff --git a/net/openvswitch/vport.h b/net/openvswitch/vport.h index 
> 7d276f60c000..b872117af763 100644
> --- a/net/openvswitch/vport.h
> +++ b/net/openvswitch/vport.h
> @@ -32,6 +32,11 @@ struct vport *ovs_vport_locate(const struct net 
> *net, const char *name);
>
>  void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
>
> +void ovs_vport_get_upcall_stats(struct vport *vport,
> +				struct ovs_vport_upcall_stats *stats); int 
> +ovs_vport_put_upcall_stats(struct sk_buff *skb,
> +			       struct ovs_vport_upcall_stats *stats);
> +
>  int ovs_vport_set_options(struct vport *, struct nlattr *options);  
> int ovs_vport_get_options(const struct vport *, struct sk_buff *);
>
> @@ -65,6 +70,7 @@ 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 +84,7 @@ 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 +144,18 @@ 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 *);
> --
> 2.27.0



^ permalink raw reply	[flat|nested] 11+ messages in thread
end of thread, other threads:[~2022-11-30  9:13 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-11-23  9:18 [PATCH] [openvswitch v4] openvswitch: Add support to count upcall packets wangchuanlei
2022-11-23 18:38 ` Alexander Lobakin
2022-11-24  2:24   ` wangchuanlei
2022-11-24 17:33     ` Alexander Lobakin
2022-11-24  7:58 ` Eelco Chaudron
2022-11-26  4:12 ` kernel test robot
  -- strict thread matches above, loose matches on Subject: below --
2022-11-24  2:30 wangchuanlei
2022-11-24  8:32 wangchuanlei
2022-11-30  6:12 wangchuanlei
2022-11-30  6:15 wangchuanlei
2022-11-30  9:12 wangchuanlei

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