diff options
| -rw-r--r-- | net/openvswitch/Makefile | 1 | ||||
| -rw-r--r-- | net/openvswitch/datapath.c | 14 | ||||
| -rw-r--r-- | net/openvswitch/datapath.h | 3 | ||||
| -rw-r--r-- | net/openvswitch/meter.c | 604 | ||||
| -rw-r--r-- | net/openvswitch/meter.h | 54 |
5 files changed, 674 insertions, 2 deletions
diff --git a/net/openvswitch/Makefile b/net/openvswitch/Makefile index 299f4476cf44..41109c326f3a 100644 --- a/net/openvswitch/Makefile +++ b/net/openvswitch/Makefile @@ -12,6 +12,7 @@ openvswitch-y := \ flow.o \ flow_netlink.o \ flow_table.o \ + meter.o \ vport.o \ vport-internal_dev.o \ vport-netdev.o diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index 6e098035bb8f..0dab33fb9844 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -55,6 +55,7 @@ #include "flow.h" #include "flow_table.h" #include "flow_netlink.h" +#include "meter.h" #include "vport-internal_dev.h" #include "vport-netdev.h" @@ -174,6 +175,7 @@ static void destroy_dp_rcu(struct rcu_head *rcu) ovs_flow_tbl_destroy(&dp->table); free_percpu(dp->stats_percpu); kfree(dp->ports); + ovs_meters_exit(dp); kfree(dp); } @@ -1572,6 +1574,10 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) INIT_HLIST_HEAD(&dp->ports[i]); + err = ovs_meters_init(dp); + if (err) + goto err_destroy_ports_array; + /* Set up our datapath device. */ parms.name = nla_data(a[OVS_DP_ATTR_NAME]); parms.type = OVS_VPORT_TYPE_INTERNAL; @@ -1600,7 +1606,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info) ovs_dp_reset_user_features(skb, info); } - goto err_destroy_ports_array; + goto err_destroy_meters; } err = ovs_dp_cmd_fill_info(dp, reply, info->snd_portid, @@ -1615,8 +1621,10 @@ 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_ports_array: +err_destroy_meters: ovs_unlock(); + ovs_meters_exit(dp); +err_destroy_ports_array: kfree(dp->ports); err_destroy_percpu: free_percpu(dp->stats_percpu); @@ -2265,6 +2273,7 @@ static struct genl_family * const dp_genl_families[] = { &dp_vport_genl_family, &dp_flow_genl_family, &dp_packet_genl_family, + &dp_meter_genl_family, }; static void dp_unregister_genl(int n_families) @@ -2445,3 +2454,4 @@ MODULE_ALIAS_GENL_FAMILY(OVS_DATAPATH_FAMILY); MODULE_ALIAS_GENL_FAMILY(OVS_VPORT_FAMILY); MODULE_ALIAS_GENL_FAMILY(OVS_FLOW_FAMILY); MODULE_ALIAS_GENL_FAMILY(OVS_PACKET_FAMILY); +MODULE_ALIAS_GENL_FAMILY(OVS_METER_FAMILY); diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h index 954c4ed465a5..5d2997b42460 100644 --- a/net/openvswitch/datapath.h +++ b/net/openvswitch/datapath.h @@ -92,6 +92,9 @@ struct datapath { u32 user_features; u32 max_headroom; + + /* Switch meters. */ + struct hlist_head *meters; }; /** diff --git a/net/openvswitch/meter.c b/net/openvswitch/meter.c new file mode 100644 index 000000000000..2a5ba356c472 --- /dev/null +++ b/net/openvswitch/meter.c @@ -0,0 +1,604 @@ +/* + * Copyright (c) 2017 Nicira, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/if.h> +#include <linux/skbuff.h> +#include <linux/ip.h> +#include <linux/kernel.h> +#include <linux/openvswitch.h> +#include <linux/netlink.h> +#include <linux/rculist.h> + +#include <net/netlink.h> +#include <net/genetlink.h> + +#include "datapath.h" +#include "meter.h" + +#define METER_HASH_BUCKETS 1024 + +static const struct nla_policy meter_policy[OVS_METER_ATTR_MAX + 1] = { + [OVS_METER_ATTR_ID] = { .type = NLA_U32, }, + [OVS_METER_ATTR_KBPS] = { .type = NLA_FLAG }, + [OVS_METER_ATTR_STATS] = { .len = sizeof(struct ovs_flow_stats) }, + [OVS_METER_ATTR_BANDS] = { .type = NLA_NESTED }, + [OVS_METER_ATTR_USED] = { .type = NLA_U64 }, + [OVS_METER_ATTR_CLEAR] = { .type = NLA_FLAG }, + [OVS_METER_ATTR_MAX_METERS] = { .type = NLA_U32 }, + [OVS_METER_ATTR_MAX_BANDS] = { .type = NLA_U32 }, +}; + +static const struct nla_policy band_policy[OVS_BAND_ATTR_MAX + 1] = { + [OVS_BAND_ATTR_TYPE] = { .type = NLA_U32, }, + [OVS_BAND_ATTR_RATE] = { .type = NLA_U32, }, + [OVS_BAND_ATTR_BURST] = { .type = NLA_U32, }, + [OVS_BAND_ATTR_STATS] = { .len = sizeof(struct ovs_flow_stats) }, +}; + +static void rcu_free_ovs_meter_callback(struct rcu_head *rcu) +{ + struct dp_meter *meter = container_of(rcu, struct dp_meter, rcu); + + kfree(meter); +} + +static void ovs_meter_free(struct dp_meter *meter) +{ + if (!meter) + return; + + call_rcu(&meter->rcu, rcu_free_ovs_meter_callback); +} + +static struct hlist_head *meter_hash_bucket(const struct datapath *dp, + u32 meter_id) +{ + return &dp->meters[meter_id & (METER_HASH_BUCKETS - 1)]; +} + +/* Call with ovs_mutex or RCU read lock. */ +static struct dp_meter *lookup_meter(const struct datapath *dp, + u32 meter_id) +{ + struct dp_meter *meter; + struct hlist_head *head; + + head = meter_hash_bucket(dp, meter_id); + hlist_for_each_entry_rcu(meter, head, dp_hash_node) { + if (meter->id == meter_id) + return meter; + } + return NULL; +} + +static void attach_meter(struct datapath *dp, struct dp_meter *meter) +{ + struct hlist_head *head = meter_hash_bucket(dp, meter->id); + + hlist_add_head_rcu(&meter->dp_hash_node, head); +} + +static void detach_meter(struct dp_meter *meter) +{ + ASSERT_OVSL(); + if (meter) + hlist_del_rcu(&meter->dp_hash_node); +} + +static struct sk_buff * +ovs_meter_cmd_reply_start(struct genl_info *info, u8 cmd, + struct ovs_header **ovs_reply_header) +{ + struct sk_buff *skb; + struct ovs_header *ovs_header = info->userhdr; + + skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); + if (!skb) + return ERR_PTR(-ENOMEM); + + *ovs_reply_header = genlmsg_put(skb, info->snd_portid, + info->snd_seq, + &dp_meter_genl_family, 0, cmd); + if (!ovs_reply_header) { + nlmsg_free(skb); + return ERR_PTR(-EMSGSIZE); + } + (*ovs_reply_header)->dp_ifindex = ovs_header->dp_ifindex; + + return skb; +} + +static int ovs_meter_cmd_reply_stats(struct sk_buff *reply, u32 meter_id, + struct dp_meter *meter) +{ + struct nlattr *nla; + struct dp_meter_band *band; + u16 i; + + if (nla_put_u32(reply, OVS_METER_ATTR_ID, meter_id)) + goto error; + + if (!meter) + return 0; + + if (nla_put(reply, OVS_METER_ATTR_STATS, + sizeof(struct ovs_flow_stats), &meter->stats) || + nla_put_u64_64bit(reply, OVS_METER_ATTR_USED, meter->used, + OVS_METER_ATTR_PAD)) + goto error; + + nla = nla_nest_start(reply, OVS_METER_ATTR_BANDS); + if (!nla) + goto error; + + band = meter->bands; + + for (i = 0; i < meter->n_bands; ++i, ++band) { + struct nlattr *band_nla; + + band_nla = nla_nest_start(reply, OVS_BAND_ATTR_UNSPEC); + if (!band_nla || nla_put(reply, OVS_BAND_ATTR_STATS, + sizeof(struct ovs_flow_stats), + &band->stats)) + goto error; + nla_nest_end(reply, band_nla); + } + nla_nest_end(reply, nla); + + return 0; +error: + return -EMSGSIZE; +} + +static int ovs_meter_cmd_features(struct sk_buff *skb, struct genl_info *info) +{ + struct sk_buff *reply; + struct ovs_header *ovs_reply_header; + struct nlattr *nla, *band_nla; + int err; + + reply = ovs_meter_cmd_reply_start(info, OVS_METER_CMD_FEATURES, + &ovs_reply_header); + if (!reply) + return PTR_ERR(reply); + + if (nla_put_u32(reply, OVS_METER_ATTR_MAX_METERS, U32_MAX) || + nla_put_u32(reply, OVS_METER_ATTR_MAX_BANDS, DP_MAX_BANDS)) + goto nla_put_failure; + + nla = nla_nest_start(reply, OVS_METER_ATTR_BANDS); + if (!nla) + goto nla_put_failure; + + band_nla = nla_nest_start(reply, OVS_BAND_ATTR_UNSPEC); + if (!band_nla) + goto nla_put_failure; + /* Currently only DROP band type is supported. */ + if (nla_put_u32(reply, OVS_BAND_ATTR_TYPE, OVS_METER_BAND_TYPE_DROP)) + goto nla_put_failure; + nla_nest_end(reply, band_nla); + nla_nest_end(reply, nla); + + genlmsg_end(reply, ovs_reply_header); + return genlmsg_reply(reply, info); + +nla_put_failure: + nlmsg_free(reply); + err = -EMSGSIZE; + return err; +} + +static struct dp_meter *dp_meter_create(struct nlattr **a) +{ + struct nlattr *nla; + int rem; + u16 n_bands = 0; + struct dp_meter *meter; + struct dp_meter_band *band; + int err; + + /* Validate attributes, count the bands. */ + if (!a[OVS_METER_ATTR_BANDS]) + return ERR_PTR(-EINVAL); + + nla_for_each_nested(nla, a[OVS_METER_ATTR_BANDS], rem) + if (++n_bands > DP_MAX_BANDS) + return ERR_PTR(-EINVAL); + + /* Allocate and set up the meter before locking anything. */ + meter = kzalloc(n_bands * sizeof(struct dp_meter_band) + + sizeof(*meter), GFP_KERNEL); + if (!meter) + return ERR_PTR(-ENOMEM); + + meter->used = div_u64(ktime_get_ns(), 1000 * 1000); + meter->kbps = a[OVS_METER_ATTR_KBPS] ? 1 : 0; + meter->keep_stats = !a[OVS_METER_ATTR_CLEAR]; + spin_lock_init(&meter->lock); + if (meter->keep_stats && a[OVS_METER_ATTR_STATS]) { + meter->stats = *(struct ovs_flow_stats *) + nla_data(a[OVS_METER_ATTR_STATS]); + } + meter->n_bands = n_bands; + + /* Set up meter bands. */ + band = meter->bands; + nla_for_each_nested(nla, a[OVS_METER_ATTR_BANDS], rem) { + struct nlattr *attr[OVS_BAND_ATTR_MAX + 1]; + u32 band_max_delta_t; + + err = nla_parse((struct nlattr **)&attr, OVS_BAND_ATTR_MAX, + nla_data(nla), nla_len(nla), band_policy, + NULL); + if (err) + goto exit_free_meter; + + if (!attr[OVS_BAND_ATTR_TYPE] || + !attr[OVS_BAND_ATTR_RATE] || + !attr[OVS_BAND_ATTR_BURST]) { + err = -EINVAL; + goto exit_free_meter; + } + + band->type = nla_get_u32(attr[OVS_BAND_ATTR_TYPE]); + band->rate = nla_get_u32(attr[OVS_BAND_ATTR_RATE]); + band->burst_size = nla_get_u32(attr[OVS_BAND_ATTR_BURST]); + /* Figure out max delta_t that is enough to fill any bucket. + * Keep max_delta_t size to the bucket units: + * pkts => 1/1000 packets, kilobits => bits. + */ + band_max_delta_t = (band->burst_size + band->rate) * 1000; + /* Start with a full bucket. */ + band->bucket = band_max_delta_t; + if (band_max_delta_t > meter->max_delta_t) + meter->max_delta_t = band_max_delta_t; + band++; + } + + return meter; + +exit_free_meter: + kfree(meter); + return ERR_PTR(err); +} + +static int ovs_meter_cmd_set(struct sk_buff *skb, struct genl_info *info) +{ + struct nlattr **a = info->attrs; + struct dp_meter *meter, *old_meter; + struct sk_buff *reply; + struct ovs_header *ovs_reply_header; + struct ovs_header *ovs_header = info->userhdr; + struct datapath *dp; + int err; + u32 meter_id; + bool failed; + + meter = dp_meter_create(a); + if (IS_ERR_OR_NULL(meter)) + return PTR_ERR(meter); + + reply = ovs_meter_cmd_reply_start(info, OVS_METER_CMD_SET, + &ovs_reply_header); + if (IS_ERR(reply)) { + err = PTR_ERR(reply); + goto exit_free_meter; + } + + ovs_lock(); + dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); + if (!dp) { + err = -ENODEV; + goto exit_unlock; + } + + if (!a[OVS_METER_ATTR_ID]) { + err = -ENODEV; + goto exit_unlock; + } + + meter_id = nla_get_u32(a[OVS_METER_ATTR_ID]); + + /* Cannot fail after this. */ + old_meter = lookup_meter(dp, meter_id); + detach_meter(old_meter); + attach_meter(dp, meter); + ovs_unlock(); + + /* Build response with the meter_id and stats from + * the old meter, if any. + */ + failed = nla_put_u32(reply, OVS_METER_ATTR_ID, meter_id); + WARN_ON(failed); + if (old_meter) { + spin_lock_bh(&old_meter->lock); + if (old_meter->keep_stats) { + err = ovs_meter_cmd_reply_stats(reply, meter_id, + old_meter); + WARN_ON(err); + } + spin_unlock_bh(&old_meter->lock); + ovs_meter_free(old_meter); + } + + genlmsg_end(reply, ovs_reply_header); + return genlmsg_reply(reply, info); + +exit_unlock: + ovs_unlock(); + nlmsg_free(reply); +exit_free_meter: + kfree(meter); + return err; +} + +static int ovs_meter_cmd_get(struct sk_buff *skb, struct genl_info *info) +{ + struct nlattr **a = info->attrs; + u32 meter_id; + struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_reply_header; + struct datapath *dp; + int err; + struct sk_buff *reply; + struct dp_meter *meter; + + if (!a[OVS_METER_ATTR_ID]) + return -EINVAL; + + meter_id = nla_get_u32(a[OVS_METER_ATTR_ID]); + + reply = ovs_meter_cmd_reply_start(info, OVS_METER_CMD_GET, + &ovs_reply_header); + if (IS_ERR(reply)) + return PTR_ERR(reply); + + ovs_lock(); + + dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); + if (!dp) { + err = -ENODEV; + goto exit_unlock; + } + + /* Locate meter, copy stats. */ + meter = lookup_meter(dp, meter_id); + if (!meter) { + err = -ENOENT; + goto exit_unlock; + } + + spin_lock_bh(&meter->lock); + err = ovs_meter_cmd_reply_stats(reply, meter_id, meter); + spin_unlock_bh(&meter->lock); + if (err) + goto exit_unlock; + + ovs_unlock(); + + genlmsg_end(reply, ovs_reply_header); + return genlmsg_reply(reply, info); + +exit_unlock: + ovs_unlock(); + nlmsg_free(reply); + return err; +} + +static int ovs_meter_cmd_del(struct sk_buff *skb, struct genl_info *info) +{ + struct nlattr **a = info->attrs; + u32 meter_id; + struct ovs_header *ovs_header = info->userhdr; + struct ovs_header *ovs_reply_header; + struct datapath *dp; + int err; + struct sk_buff *reply; + struct dp_meter *old_meter; + + if (!a[OVS_METER_ATTR_ID]) + return -EINVAL; + meter_id = nla_get_u32(a[OVS_METER_ATTR_ID]); + + reply = ovs_meter_cmd_reply_start(info, OVS_METER_CMD_DEL, + &ovs_reply_header); + if (IS_ERR(reply)) + return PTR_ERR(reply); + + ovs_lock(); + + dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex); + if (!dp) { + err = -ENODEV; + goto exit_unlock; + } + + old_meter = lookup_meter(dp, meter_id); + if (old_meter) { + spin_lock_bh(&old_meter->lock); + err = ovs_meter_cmd_reply_stats(reply, meter_id, old_meter); + WARN_ON(err); + spin_unlock_bh(&old_meter->lock); + detach_meter(old_meter); + } + ovs_unlock(); + ovs_meter_free(old_meter); + genlmsg_end(reply, ovs_reply_header); + return genlmsg_reply(reply, info); + +exit_unlock: + ovs_unlock(); + nlmsg_free(reply); + return err; +} + +/* Meter action execution. + * + * Return true 'meter_id' drop band is triggered. The 'skb' should be + * dropped by the caller'. + */ +bool ovs_meter_execute(struct datapath *dp, struct sk_buff *skb, + struct sw_flow_key *key, u32 meter_id) +{ + struct dp_meter *meter; + struct dp_meter_band *band; + long long int now_ms = div_u64(ktime_get_ns(), 1000 * 1000); + long long int long_delta_ms; + u32 delta_ms; + u32 cost; + int i, band_exceeded_max = -1; + u32 band_exceeded_rate = 0; + + meter = lookup_meter(dp, meter_id); + /* Do not drop the packet when there is no meter. */ + if (!meter) + return false; + + /* Lock the meter while using it. */ + spin_lock(&meter->lock); + + long_delta_ms = (now_ms - meter->used); /* ms */ + + /* Make sure delta_ms will not be too large, so that bucket will not + * wrap around below. + */ + delta_ms = (long_delta_ms > (long long int)meter->max_delta_t) + ? meter->max_delta_t : (u32)long_delta_ms; + + /* Update meter statistics. + */ + meter->used = now_ms; + meter->stats.n_packets += 1; + meter->stats.n_bytes += skb->len; + + /* Bucket rate is either in kilobits per second, or in packets per + * second. We maintain the bucket in the units of either bits or + * 1/1000th of a packet, correspondingly. + * Then, when rate is multiplied with milliseconds, we get the + * bucket units: + * msec * kbps = bits, and + * msec * packets/sec = 1/1000 packets. + * + * 'cost' is the number of bucket units in this packet. + */ + cost = (meter->kbps) ? skb->len * 8 : 1000; + + /* Update all bands and find the one hit with the highest rate. */ + for (i = 0; i < meter->n_bands; ++i) { + long long int max_bucket_size; + + band = &meter->bands[i]; + max_bucket_size = (band->burst_size + band->rate) * 1000; + + band->bucket += delta_ms * band->rate; + if (band->bucket > max_bucket_size) + band->bucket = max_bucket_size; + + if (band->bucket >= cost) { + band->bucket -= cost; + } else if (band->rate > band_exceeded_rate) { + band_exceeded_rate = band->rate; + band_exceeded_max = i; + } + } + + if (band_exceeded_max >= 0) { + /* Update band statistics. */ + band = &meter->bands[band_exceeded_max]; + band->stats.n_packets += 1; + band->stats.n_bytes += skb->len; + + /* Drop band triggered, let the caller drop the 'skb'. */ + if (band->type == OVS_METER_BAND_TYPE_DROP) { + spin_unlock(&meter->lock); + return true; + } + } + + spin_unlock(&meter->lock); + return false; +} + +static struct genl_ops dp_meter_genl_ops[] = { + { .cmd = OVS_METER_CMD_FEATURES, + .flags = 0, /* OK for unprivileged users. */ + .policy = meter_policy, + .doit = ovs_meter_cmd_features + }, + { .cmd = OVS_METER_CMD_SET, + .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN + * privilege. + */ + .policy = meter_policy, + .doit = ovs_meter_cmd_set, + }, + { .cmd = OVS_METER_CMD_GET, + .flags = 0, /* OK for unprivileged users. */ + .policy = meter_policy, + .doit = ovs_meter_cmd_get, + }, + { .cmd = OVS_METER_CMD_DEL, + .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN + * privilege. + */ + .policy = meter_policy, + .doit = ovs_meter_cmd_del + }, +}; + +static const struct genl_multicast_group ovs_meter_multicast_group = { + .name = OVS_METER_MCGROUP, +}; + +struct genl_family dp_meter_genl_family __ro_after_init = { + .hdrsize = sizeof(struct ovs_header), + .name = OVS_METER_FAMILY, + .version = OVS_METER_VERSION, + .maxattr = OVS_METER_ATTR_MAX, + .netnsok = true, + .parallel_ops = true, + .ops = dp_meter_genl_ops, + .n_ops = ARRAY_SIZE(dp_meter_genl_ops), + .mcgrps = &ovs_meter_multicast_group, + .n_mcgrps = 1, + .module = THIS_MODULE, +}; + +int ovs_meters_init(struct datapath *dp) +{ + int i; + + dp->meters = kmalloc_array(METER_HASH_BUCKETS, + sizeof(struct hlist_head), GFP_KERNEL); + + if (!dp->meters) + return -ENOMEM; + + for (i = 0; i < METER_HASH_BUCKETS; i++) + INIT_HLIST_HEAD(&dp->meters[i]); + + return 0; +} + +void ovs_meters_exit(struct datapath *dp) +{ + int i; + + for (i = 0; i < METER_HASH_BUCKETS; i++) { + struct hlist_head *head = &dp->meters[i]; + struct dp_meter *meter; + struct hlist_node *n; + + hlist_for_each_entry_safe(meter, n, head, dp_hash_node) + kfree(meter); + } + + kfree(dp->meters); +} diff --git a/net/openvswitch/meter.h b/net/openvswitch/meter.h new file mode 100644 index 000000000000..964ace2650f8 --- /dev/null +++ b/net/openvswitch/meter.h @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2017 Nicira, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + */ + +#ifndef METER_H +#define METER_H 1 + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/netlink.h> +#include <linux/openvswitch.h> +#include <linux/genetlink.h> +#include <linux/skbuff.h> + +#include "flow.h" +struct datapath; + +#define DP_MAX_BANDS 1 + +struct dp_meter_band { + u32 type; + u32 rate; + u32 burst_size; + u32 bucket; /* 1/1000 packets, or in bits */ + struct ovs_flow_stats stats; +}; + +struct dp_meter { + spinlock_t lock; /* Per meter lock */ + struct rcu_head rcu; + struct hlist_node dp_hash_node; /*Element in datapath->meters + * hash table. + */ + u32 id; + u16 kbps:1, keep_stats:1; + u16 n_bands; + u32 max_delta_t; + u64 used; + struct ovs_flow_stats stats; + struct dp_meter_band bands[]; +}; + +extern struct genl_family dp_meter_genl_family; +int ovs_meters_init(struct datapath *dp); +void ovs_meters_exit(struct datapath *dp); +bool ovs_meter_execute(struct datapath *dp, struct sk_buff *skb, + struct sw_flow_key *key, u32 meter_id); + +#endif /* meter.h */ |