On 4/28/23 11:42, Ales Musil wrote:
> Move the refactored packet buffering infrastructure into
> mac-learn module. This encapsulates the whole packet buffering
> process behind few functions.
>
> Signed-off-by: Ales Musil <amu...@redhat.com>
> ---
> controller/mac-learn.c | 231 ++++++++++++++++++++++++++++++++++++-----
> controller/mac-learn.h | 63 +++++++++--
> controller/pinctrl.c | 198 ++---------------------------------
> 3 files changed, 271 insertions(+), 221 deletions(-)
>
> diff --git a/controller/mac-learn.c b/controller/mac-learn.c
> index ecc3c2acc..a2d3417eb 100644
> --- a/controller/mac-learn.c
> +++ b/controller/mac-learn.c
> @@ -18,21 +18,34 @@
> #include "mac-learn.h"
>
> /* OpenvSwitch lib includes. */
> +#include "dp-packet.h"
Nit: It's already included by "mac-learn.h".
> #include "openvswitch/poll-loop.h"
> #include "openvswitch/vlog.h"
> #include "lib/packets.h"
> -#include "lib/random.h"
> #include "lib/smap.h"
> #include "lib/timeval.h"
>
> VLOG_DEFINE_THIS_MODULE(mac_learn);
>
> -#define MAX_FDB_ENTRIES 1000
> +#define MAX_FDB_ENTRIES 1000
> +#define MAX_BUFFERED_PACKETS 1000
> +#define BUFFER_QUEUE_DEPTH 4
>
> +static size_t keys_ip_hash(uint32_t dp_key, uint32_t port_key,
> + struct in6_addr *ip);
> +static struct mac_binding *mac_binding_find(const struct mac_bindings_map
> + *mac_bindings, uint32_t dp_key,
> + uint32_t port_key,
> + struct in6_addr *ip, size_t
> hash);
> static size_t fdb_entry_hash(uint32_t dp_key, struct eth_addr *);
>
> static struct fdb_entry *fdb_entry_find(struct hmap *fdbs, uint32_t dp_key,
> struct eth_addr *mac, size_t hash);
> +static struct buffered_packets *
> +buffered_packets_find(struct buffered_packets_ctx *ctx, uint64_t dp_key,
> + uint64_t port_key, struct in6_addr *ip, uint32_t hash);
> +static void ovn_buffered_packets_remove(struct buffered_packets_ctx *ctx,
> + struct buffered_packets *bp);
>
> /* mac_binding functions. */
> void
> @@ -62,7 +75,7 @@ ovn_mac_binding_add(struct mac_bindings_map *mac_bindings,
> uint32_t dp_key,
> uint32_t hash = keys_ip_hash(dp_key, port_key, ip);
>
> struct mac_binding *mb =
> - ovn_mac_binding_find(mac_bindings, dp_key, port_key, ip, hash);
> + mac_binding_find(mac_bindings, dp_key, port_key, ip, hash);
> size_t max_size = mac_bindings->max_size;
> if (!mb) {
> if (max_size && hmap_count(&mac_bindings->map) >= max_size) {
> @@ -109,29 +122,6 @@ ovn_is_mac_binding_timestamp_past(const struct
> mac_binding *mb, long long now)
> return now >= mb->timestamp;
> }
>
> -size_t
> -keys_ip_hash(uint32_t dp_key, uint32_t port_key, struct in6_addr *ip)
> -{
> - return hash_bytes(ip, sizeof *ip, hash_2words(dp_key, port_key));
> -}
> -
> -struct mac_binding *
> -ovn_mac_binding_find(const struct mac_bindings_map *mac_bindings,
> - uint32_t dp_key, uint32_t port_key, struct in6_addr *ip,
> - size_t hash)
> -{
> - struct mac_binding *mb;
> -
> - HMAP_FOR_EACH_WITH_HASH (mb, hmap_node, hash, &mac_bindings->map) {
> - if (mb->dp_key == dp_key && mb->port_key == port_key &&
> - IN6_ARE_ADDR_EQUAL(&mb->ip, ip)) {
> - return mb;
> - }
> - }
> -
> - return NULL;
> -}
> -
> /* fdb functions. */
> void
> ovn_fdb_init(struct hmap *fdbs)
> @@ -179,6 +169,164 @@ ovn_fdb_add(struct hmap *fdbs, uint32_t dp_key, struct
> eth_addr mac,
>
> }
>
> +/* packet buffering functions */
> +
> +struct packet_data *
> +ovn_packet_data_create(struct ofpbuf ofpacts,
> + const struct dp_packet *original_packet)
> +{
> + struct packet_data *pd = xmalloc(sizeof *pd);
> +
> + pd->ofpacts = ofpacts;
> + /* clone the packet to send it later with correct L2 address */
> + pd->p = dp_packet_clone_data(dp_packet_data(original_packet),
> + dp_packet_size(original_packet));
> +
> + return pd;
> +}
> +
> +
> +void
> +ovn_packet_data_destroy(struct packet_data *pd)
> +{
> + dp_packet_delete(pd->p);
> + ofpbuf_uninit(&pd->ofpacts);
> + free(pd);
> +}
> +
> +struct buffered_packets *
> +ovn_buffered_packets_add(struct buffered_packets_ctx *ctx, uint64_t dp_key,
> + uint64_t port_key, struct in6_addr ip)
> +{
> + struct buffered_packets *bp;
> +
> + uint32_t hash = keys_ip_hash(dp_key, port_key, &ip);
> +
> + bp = buffered_packets_find(ctx, dp_key, port_key, &ip, hash);
> + if (!bp) {
> + if (hmap_count(&ctx->buffered_packets) >= MAX_BUFFERED_PACKETS) {
> + return NULL;
> + }
> +
> + bp = xmalloc(sizeof *bp);
> + hmap_insert(&ctx->buffered_packets, &bp->hmap_node, hash);
> + bp->ip = ip;
> + bp->dp_key = dp_key;
> + bp->port_key = port_key;
> + ovs_list_init(&bp->queue);
> + }
> +
> + bp->expire = time_msec() + OVN_BUFFERED_PACKETS_TIMEOUT;
> +
> + return bp;
> +}
> +
> +void
> +ovn_buffered_packets_packet_data_enqueue(struct buffered_packets *bp,
> + struct packet_data *pd)
> +{
> + if (ovs_list_size(&bp->queue) == BUFFER_QUEUE_DEPTH) {
> + struct packet_data *p = CONTAINER_OF(ovs_list_pop_front(&bp->queue),
> + struct packet_data, node);
> +
> + ovn_packet_data_destroy(p);
> + }
> + ovs_list_push_back(&bp->queue, &pd->node);
> +}
> +
> +void
> +ovn_buffered_packets_ctx_run(struct buffered_packets_ctx *ctx,
> + const struct mac_bindings_map *recent_mbs)
> +{
> + long long now = time_msec();
> +
> + struct buffered_packets *bp;
> +
> + HMAP_FOR_EACH_SAFE (bp, hmap_node, &ctx->buffered_packets) {
> + /* Remove expired buffered packets. */
> + if (now > bp->expire) {
> + ovn_buffered_packets_remove(ctx, bp);
> + continue;
> + }
> +
> + uint32_t hash = keys_ip_hash(bp->dp_key, bp->port_key, &bp->ip);
> + struct mac_binding *mb = mac_binding_find(recent_mbs, bp->dp_key,
> + bp->port_key, &bp->ip,
> hash);
> +
> + if (!mb) {
> + continue;
> + }
> +
> + struct packet_data *pd;
> + LIST_FOR_EACH_POP (pd, node, &bp->queue) {
> + struct eth_header *eth = dp_packet_data(pd->p);
> + eth->eth_dst = mb->mac;
> +
> + ovs_list_push_back(&ctx->ready_packets_data, &pd->node);
> + }
> +
> + ovn_buffered_packets_remove(ctx, bp);
> + }
> +}
> +
> +bool
> +ovn_buffered_packets_ctx_is_ready_to_send(struct buffered_packets_ctx *ctx)
> +{
> + return !ovs_list_is_empty(&ctx->ready_packets_data);
> +}
> +
> +bool
> +ovn_buffered_packets_ctx_has_packets(struct buffered_packets_ctx *ctx)
> +{
> + return !hmap_is_empty(&ctx->buffered_packets);
> +}
> +
> +void
> +ovn_buffered_packets_ctx_init(struct buffered_packets_ctx *ctx)
> +{
> + hmap_init(&ctx->buffered_packets);
> + ovs_list_init(&ctx->ready_packets_data);
> +}
> +
> +void
> +ovn_buffered_packets_ctx_destroy(struct buffered_packets_ctx *ctx)
> +{
> + struct packet_data *pd;
> + LIST_FOR_EACH_POP (pd, node, &ctx->ready_packets_data) {
> + ovn_packet_data_destroy(pd);
> + }
> +
> + struct buffered_packets *bp;
> + HMAP_FOR_EACH_SAFE (bp, hmap_node, &ctx->buffered_packets) {
> + ovn_buffered_packets_remove(ctx, bp);
> + }
> + hmap_destroy(&ctx->buffered_packets);
> +}
> +
> +/* mac_binding related static functions. */
> +static size_t
> +keys_ip_hash(uint32_t dp_key, uint32_t port_key, struct in6_addr *ip)
> +{
> + return hash_bytes(ip, sizeof *ip, hash_2words(dp_key, port_key));
> +}
> +
> +static struct mac_binding *
> +mac_binding_find(const struct mac_bindings_map *mac_bindings,
> + uint32_t dp_key, uint32_t port_key, struct in6_addr *ip,
> + size_t hash)
> +{
> + struct mac_binding *mb;
> +
> + HMAP_FOR_EACH_WITH_HASH (mb, hmap_node, hash, &mac_bindings->map) {
> + if (mb->dp_key == dp_key && mb->port_key == port_key &&
> + IN6_ARE_ADDR_EQUAL(&mb->ip, ip)) {
> + return mb;
> + }
> + }
> +
> + return NULL;
> +}
> +
> /* fdb related static functions. */
>
> static size_t
> @@ -201,3 +349,34 @@ fdb_entry_find(struct hmap *fdbs, uint32_t dp_key,
>
> return NULL;
> }
> +
> +/* packet buffering static functions. */
> +static struct buffered_packets *
> +buffered_packets_find(struct buffered_packets_ctx *ctx, uint64_t dp_key,
> + uint64_t port_key, struct in6_addr *ip, uint32_t hash)
> +{
> + struct buffered_packets *mb;
> +
> + HMAP_FOR_EACH_WITH_HASH (mb, hmap_node, hash, &ctx->buffered_packets) {
> + if (mb->dp_key == dp_key && mb->port_key == port_key &&
> + IN6_ARE_ADDR_EQUAL(&mb->ip, ip)) {
> + return mb;
> + }
> + }
> +
> + return NULL;
> +}
> +
> +static void
> +ovn_buffered_packets_remove(struct buffered_packets_ctx *ctx,
> + struct buffered_packets *bp)
> +{
> + struct packet_data *pd;
> +
> + LIST_FOR_EACH_POP (pd, node, &bp->queue) {
> + ovn_packet_data_destroy(pd);
> + }
> +
> + hmap_remove(&ctx->buffered_packets, &bp->hmap_node);
> + free(bp);
> +}
> diff --git a/controller/mac-learn.h b/controller/mac-learn.h
> index 55375cf90..3de57bf4c 100644
> --- a/controller/mac-learn.h
> +++ b/controller/mac-learn.h
> @@ -19,7 +19,11 @@
>
> #include <sys/types.h>
> #include <netinet/in.h>
> +
> +#include "dp-packet.h"
> #include "openvswitch/hmap.h"
> +#include "openvswitch/list.h"
> +#include "openvswitch/ofpbuf.h"
>
> struct mac_binding {
> struct hmap_node hmap_node; /* In a hmap. */
> @@ -57,11 +61,6 @@ struct mac_binding *ovn_mac_binding_add(struct
> mac_bindings_map *mac_bindings,
> struct in6_addr *ip,
> struct eth_addr mac,
> uint32_t timestamp_offset);
> -size_t keys_ip_hash(uint32_t dp_key, uint32_t port_key, struct in6_addr *ip);
> -struct mac_binding *
> -ovn_mac_binding_find(const struct mac_bindings_map *mac_bindings,
> - uint32_t dp_key, uint32_t port_key, struct in6_addr *ip,
> - size_t hash);
>
>
> struct fdb_entry {
> @@ -80,7 +79,57 @@ void ovn_fdbs_flush(struct hmap *fdbs);
> void ovn_fdbs_destroy(struct hmap *fdbs);
>
> struct fdb_entry *ovn_fdb_add(struct hmap *fdbs,
> - uint32_t dp_key, struct eth_addr mac,
> - uint32_t port_key);
> + uint32_t dp_key, struct eth_addr mac,
> + uint32_t port_key);
> +
> +#define OVN_BUFFERED_PACKETS_TIMEOUT 10000
> +
> +struct packet_data {
> + struct ovs_list node;
> +
> + struct ofpbuf ofpacts;
> + struct dp_packet *p;
> +};
> +
> +struct buffered_packets {
> + struct hmap_node hmap_node;
> +
> + struct in6_addr ip;
> + uint64_t dp_key;
> + uint64_t port_key;
> +
> + /* Queue of packet_data associated with this struct. */
> + struct ovs_list queue;
> +
> + /* Timestamp in ms when the buffered packet should expire. */
> + long long int expire;
> +};
> +
> +struct buffered_packets_ctx {
> + /* Map of all buffered packets waiting for the MAC address. */
> + struct hmap buffered_packets;
> + /* List of packet data that are ready to be sent. */
> + struct ovs_list ready_packets_data;
> +};
> +
> +#define OVN_BUFFERED_PACKETS_TIMEOUT 10000
Re-definition.
> +
> +struct packet_data *
> +ovn_packet_data_create(struct ofpbuf ofpacts,
> + const struct dp_packet *original_packet);
> +void ovn_packet_data_destroy(struct packet_data *pd);
> +struct buffered_packets *
> +ovn_buffered_packets_add(struct buffered_packets_ctx *ctx, uint64_t dp_key,
> + uint64_t port_key, struct in6_addr ip);
> +void ovn_buffered_packets_packet_data_enqueue(struct buffered_packets *bp,
> + struct packet_data *pd);
> +void
> +ovn_buffered_packets_ctx_run(struct buffered_packets_ctx *ctx,
> + const struct mac_bindings_map *recent_mbs);
> +void ovn_buffered_packets_ctx_init(struct buffered_packets_ctx *ctx);
> +void ovn_buffered_packets_ctx_destroy(struct buffered_packets_ctx *ctx);
> +bool
> +ovn_buffered_packets_ctx_is_ready_to_send(struct buffered_packets_ctx *ctx);
> +bool ovn_buffered_packets_ctx_has_packets(struct buffered_packets_ctx *ctx);
>
> #endif /* OVN_MAC_LEARN_H */
> diff --git a/controller/pinctrl.c b/controller/pinctrl.c
> index 9b5147753..b29033703 100644
> --- a/controller/pinctrl.c
> +++ b/controller/pinctrl.c
> @@ -1416,196 +1416,18 @@ prepare_ipv6_prefixd(struct ovsdb_idl_txn
> *ovnsb_idl_txn,
> }
> }
>
> -#define BUFFERED_PACKETS_TIMEOUT 10000
> -#define MAX_BUFFERED_PACKETS 1000
> -#define BUFFER_QUEUE_DEPTH 4
> -
> -struct packet_data {
> - struct ovs_list node;
> -
> - struct ofpbuf ofpacts;
> - struct dp_packet *p;
> -};
> -
> -struct buffered_packets {
> - struct hmap_node hmap_node;
> -
> - struct in6_addr ip;
> - uint64_t dp_key;
> - uint64_t port_key;
> -
> - /* Queue of packet_data associated with this struct. */
> - struct ovs_list queue;
> -
> - /* Timestamp in ms when the buffered packet should expire. */
> - long long int expire;
> -};
> -
> -struct buffered_packets_ctx {
> - /* Map of all buffered packets waiting for the MAC address. */
> - struct hmap buffered_packets;
> - /* List of packet data that are ready to be sent. */
> - struct ovs_list ready_packets_data;
> -};
> -
> static struct buffered_packets_ctx buffered_packets_ctx;
>
> -static struct buffered_packets *
> -buffered_packets_find(struct buffered_packets_ctx *ctx, uint64_t dp_key,
> - uint64_t port_key, struct in6_addr *ip, uint32_t hash)
> -{
> - struct buffered_packets *mb;
> - HMAP_FOR_EACH_WITH_HASH (mb, hmap_node, hash, &ctx->buffered_packets) {
> - if (mb->dp_key == dp_key && mb->port_key == port_key &&
> - IN6_ARE_ADDR_EQUAL(&mb->ip, ip)) {
> - return mb;
> - }
> - }
> -
> - return NULL;
> -}
> -
> -static struct buffered_packets *
> -buffered_packets_add(struct buffered_packets_ctx *ctx, uint64_t dp_key,
> - uint64_t port_key, struct in6_addr ip)
> -{
> - struct buffered_packets *bp;
> -
> - uint32_t hash = keys_ip_hash(dp_key, port_key, &ip);
> - bp = buffered_packets_find(ctx, dp_key, port_key, &ip, hash);
> - if (!bp) {
> - if (hmap_count(&ctx->buffered_packets) >= MAX_BUFFERED_PACKETS) {
> - return NULL;
> - }
> -
> - bp = xmalloc(sizeof *bp);
> - hmap_insert(&ctx->buffered_packets, &bp->hmap_node, hash);
> - bp->ip = ip;
> - bp->dp_key = dp_key;
> - bp->port_key = port_key;
> - ovs_list_init(&bp->queue);
> - }
> -
> - bp->expire = time_msec() + BUFFERED_PACKETS_TIMEOUT;
> -
> - return bp;
> -}
> -
> -static struct packet_data *
> -packet_data_create(struct ofpbuf ofpacts,
> - const struct dp_packet *original_packet)
> -{
> - struct packet_data *pd = xmalloc(sizeof *pd);
> -
> - pd->ofpacts = ofpacts;
> - /* clone the packet to send it later with correct L2 address */
> - pd->p = dp_packet_clone_data(dp_packet_data(original_packet),
> - dp_packet_size(original_packet));
> -
> - return pd;
> -}
> -
> -static void
> -packet_data_destroy(struct packet_data *pd)
> -{
> - dp_packet_delete(pd->p);
> - ofpbuf_uninit(&pd->ofpacts);
> - free(pd);
> -}
> -
> -static void
> -buffered_packets_packet_data_enqueue(struct buffered_packets *bp,
> - struct packet_data *pd)
> -{
> - if (ovs_list_size(&bp->queue) == BUFFER_QUEUE_DEPTH) {
> - struct packet_data *p = CONTAINER_OF(ovs_list_pop_front(&bp->queue),
> - struct packet_data, node);
> - packet_data_destroy(p);
> - }
> - ovs_list_push_back(&bp->queue, &pd->node);
> -}
> -
> -
> -static void
> -buffered_packets_remove(struct buffered_packets_ctx *ctx,
> - struct buffered_packets *bp)
> -{
> - struct packet_data *pd;
> - LIST_FOR_EACH_POP (pd, node, &bp->queue) {
> - packet_data_destroy(pd);
> - }
> -
> - hmap_remove(&ctx->buffered_packets, &bp->hmap_node);
> - free(bp);
> -}
> -
> -static void
> -buffered_packets_ctx_run(struct buffered_packets_ctx *ctx,
> - const struct mac_bindings_map *recent_mac_bindings)
> -{
> - long long now = time_msec();
> -
> - struct buffered_packets *bp;
> - HMAP_FOR_EACH_SAFE (bp, hmap_node, &ctx->buffered_packets) {
> - /* Remove expired buffered packets. */
> - if (now > bp->expire) {
> - buffered_packets_remove(ctx, bp);
> - continue;
> - }
> -
> - uint32_t hash = keys_ip_hash(bp->dp_key, bp->port_key, &bp->ip);
> - struct mac_binding *mb = ovn_mac_binding_find(recent_mac_bindings,
> - bp->dp_key,
> bp->port_key,
> - &bp->ip, hash);
> - if (!mb) {
> - continue;
> - }
> -
> - struct packet_data *pd;
> - LIST_FOR_EACH_POP (pd, node, &bp->queue) {
> - struct eth_header *eth = dp_packet_data(pd->p);
> - eth->eth_dst = mb->mac;
> -
> - ovs_list_push_back(&ctx->ready_packets_data, &pd->node);
> - }
> -
> - buffered_packets_remove(ctx, bp);
> - }
> -}
> -
> -static bool
> -buffered_packets_ctx_is_ready_to_send(struct buffered_packets_ctx *ctx)
> -{
> - return !ovs_list_is_empty(&ctx->ready_packets_data);
> -}
> -
> -static bool
> -ovn_buffered_packets_ctx_has_packets(struct buffered_packets_ctx *ctx)
> -{
> - return !hmap_is_empty(&ctx->buffered_packets);
> -}
> -
> static void
> init_buffered_packets_ctx(void)
> {
> - hmap_init(&buffered_packets_ctx.buffered_packets);
> - ovs_list_init(&buffered_packets_ctx.ready_packets_data);
> + ovn_buffered_packets_ctx_init(&buffered_packets_ctx);
> }
>
> static void
> destroy_buffered_packets_ctx(void)
> {
> - struct packet_data *pd;
> - LIST_FOR_EACH_POP (pd, node, &buffered_packets_ctx.ready_packets_data) {
> - packet_data_destroy(pd);
> - }
> -
> - struct buffered_packets *bp;
> - HMAP_FOR_EACH_SAFE (bp, hmap_node,
> - &buffered_packets_ctx.buffered_packets) {
> - buffered_packets_remove(&buffered_packets_ctx, bp);
> - }
> - hmap_destroy(&buffered_packets_ctx.buffered_packets);
> + ovn_buffered_packets_ctx_destroy(&buffered_packets_ctx);
> }
>
> /* Called with in the pinctrl_handler thread context. */
> @@ -1625,8 +1447,8 @@ OVS_REQUIRES(pinctrl_mutex)
> memcpy(&ip, &ip6, sizeof ip);
> }
>
> - struct buffered_packets *bp = buffered_packets_add(&buffered_packets_ctx,
> - dp_key, oport_key,
> ip);
> + struct buffered_packets *bp =
> + ovn_buffered_packets_add(&buffered_packets_ctx, dp_key, oport_key,
> ip);
> if (!bp) {
> COVERAGE_INC(pinctrl_drop_buffered_packets_map);
> return;
> @@ -1645,8 +1467,8 @@ OVS_REQUIRES(pinctrl_mutex)
> resubmit->in_port = OFPP_CONTROLLER;
> resubmit->table_id = OFTABLE_REMOTE_OUTPUT;
>
> - struct packet_data *pd = packet_data_create(ofpacts, pkt_in);
> - buffered_packets_packet_data_enqueue(bp, pd);
> + struct packet_data *pd = ovn_packet_data_create(ofpacts, pkt_in);
> + ovn_buffered_packets_packet_data_enqueue(bp, pd);
>
> /* There is a chance that the MAC binding was already created. */
> notify_pinctrl_main();
> @@ -4274,7 +4096,7 @@ send_mac_binding_buffered_pkts(struct rconn *swconn)
> match_set_in_port(&po.flow_metadata, OFPP_CONTROLLER);
> queue_msg(swconn, ofputil_encode_packet_out(&po, proto));
>
> - packet_data_destroy(pd);
> + ovn_packet_data_destroy(pd);
> }
>
> ovs_list_init(&buffered_packets_ctx.ready_packets_data);
> @@ -4487,11 +4309,11 @@ run_buffered_binding(struct ovsdb_idl_index
> *sbrec_port_binding_by_name,
> pb->tunnel_key, &ip, mac, 0);
> }
>
> - buffered_packets_ctx_run(&buffered_packets_ctx, &recent_mbs);
> + ovn_buffered_packets_ctx_run(&buffered_packets_ctx, &recent_mbs);
>
> ovn_mac_bindings_map_destroy(&recent_mbs);
>
> - if (buffered_packets_ctx_is_ready_to_send(&buffered_packets_ctx)) {
> + if (ovn_buffered_packets_ctx_is_ready_to_send(&buffered_packets_ctx)) {
> notify_pinctrl_handler();
> }
> }
> @@ -6095,7 +5917,7 @@ may_inject_pkts(void)
> !shash_is_empty(&send_garp_rarp_data) ||
> ipv6_prefixd_should_inject() ||
> !ovs_list_is_empty(&mcast_query_list) ||
> - buffered_packets_ctx_is_ready_to_send(&buffered_packets_ctx) ||
> + ovn_buffered_packets_ctx_is_ready_to_send(&buffered_packets_ctx)
> ||
> bfd_monitor_should_inject());
> }
>
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