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net: openvswitch: Add support to count upcall packets

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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>
This commit is contained in:
wangchuanlei 2022-12-06 20:38:57 -05:00 committed by David S. Miller
parent e47877c7aa
commit 1933ea365a
4 changed files with 121 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

14
include/uapi/linux/openvswitch.h
View file

@ -277,11 +277,25 @@ enum ovs_vport_attr {
OVS_VPORT_ATTR_PAD,
OVS_VPORT_ATTR_IFINDEX,
OVS_VPORT_ATTR_NETNSID,
OVS_VPORT_ATTR_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_ATTR_SUCCESS,
OVS_VPORT_UPCALL_ATTR_FAIL,
__OVS_VPORT_UPCALL_ATTR_MAX
};
#define OVS_VPORT_UPCALL_ATTR_MAX (__OVS_VPORT_UPCALL_ATTR_MAX - 1)
enum {
OVS_VXLAN_EXT_UNSPEC,
OVS_VXLAN_EXT_GBP, /* Flag or __u32 */

41
net/openvswitch/datapath.c
View file

@ -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 @@ 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);
@ -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[] = {

50
net/openvswitch/vport.c
View file

@ -284,6 +284,56 @@ 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.
* @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
*

16
net/openvswitch/vport.h
View file

@ -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 *);