@@ -33,6 +33,8 @@
#define COLO_COMPARE(obj) \
OBJECT_CHECK(CompareState, (obj), TYPE_COLO_COMPARE)
+#define MAX_QUEUE_SIZE 1024
+
/*
+ CompareState ++
| |
@@ -67,6 +69,11 @@ typedef struct CompareState {
SocketReadState pri_rs;
SocketReadState sec_rs;
+ /* connection list: the connections belonged to this NIC could be found
+ * in this list.
+ * element type: Connection
+ */
+ GQueue conn_list;
/* hashtable to save connection */
GHashTable *connection_track_table;
} CompareState;
@@ -94,7 +101,9 @@ static int compare_chr_send(CharDriverState *out,
*/
static int packet_enqueue(CompareState *s, int mode)
{
+ ConnectionKey key = { 0 };
Packet *pkt = NULL;
+ Connection *conn;
if (mode == PRIMARY_IN) {
pkt = packet_new(s->pri_rs.buf, s->pri_rs.packet_len);
@@ -107,17 +116,34 @@ static int packet_enqueue(CompareState *s, int mode)
pkt = NULL;
return -1;
}
- /* TODO: get connection key from pkt */
+ fill_connection_key(pkt, &key);
- /*
- * TODO: use connection key get conn from
- * connection_track_table
- */
+ conn = connection_get(s->connection_track_table,
+ &key,
+ &s->conn_list);
- /*
- * TODO: insert pkt to it's conn->primary_list
- * or conn->secondary_list
- */
+ if (!conn->processing) {
+ g_queue_push_tail(&s->conn_list, conn);
+ conn->processing = true;
+ }
+
+ if (mode == PRIMARY_IN) {
+ if (g_queue_get_length(&conn->primary_list) <=
+ MAX_QUEUE_SIZE) {
+ g_queue_push_tail(&conn->primary_list, pkt);
+ } else {
+ error_report("colo compare primary queue size too big,"
+ "drop packet");
+ }
+ } else {
+ if (g_queue_get_length(&conn->secondary_list) <=
+ MAX_QUEUE_SIZE) {
+ g_queue_push_tail(&conn->secondary_list, pkt);
+ } else {
+ error_report("colo compare secondary queue size too big,"
+ "drop packet");
+ }
+ }
return 0;
}
@@ -308,7 +334,12 @@ static void colo_compare_complete(UserCreatable *uc, Error **errp)
net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize);
net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize);
- /* use g_hash_table_new_full() to new a hashtable */
+ g_queue_init(&s->conn_list);
+
+ s->connection_track_table = g_hash_table_new_full(connection_key_hash,
+ connection_key_equal,
+ g_free,
+ connection_destroy);
return;
}
@@ -349,6 +380,8 @@ static void colo_compare_finalize(Object *obj)
qemu_chr_fe_release(s->chr_out);
}
+ g_queue_free(&s->conn_list);
+
g_free(s->pri_indev);
g_free(s->sec_indev);
g_free(s->outdev);
@@ -16,6 +16,29 @@
#include "trace.h"
#include "net/colo.h"
+uint32_t connection_key_hash(const void *opaque)
+{
+ const ConnectionKey *key = opaque;
+ uint32_t a, b, c;
+
+ /* Jenkins hash */
+ a = b = c = JHASH_INITVAL + sizeof(*key);
+ a += key->src.s_addr;
+ b += key->dst.s_addr;
+ c += (key->src_port | key->dst_port << 16);
+ __jhash_mix(a, b, c);
+
+ a += key->ip_proto;
+ __jhash_final(a, b, c);
+
+ return c;
+}
+
+int connection_key_equal(const void *key1, const void *key2)
+{
+ return memcmp(key1, key2, sizeof(ConnectionKey)) == 0;
+}
+
int parse_packet_early(Packet *pkt)
{
int network_length;
@@ -59,6 +82,62 @@ int parse_packet_early(Packet *pkt)
return 0;
}
+void fill_connection_key(Packet *pkt, ConnectionKey *key)
+{
+ uint32_t tmp_ports;
+
+ key->ip_proto = pkt->ip->ip_p;
+
+ switch (key->ip_proto) {
+ case IPPROTO_TCP:
+ case IPPROTO_UDP:
+ case IPPROTO_DCCP:
+ case IPPROTO_ESP:
+ case IPPROTO_SCTP:
+ case IPPROTO_UDPLITE:
+ tmp_ports = *(uint32_t *)(pkt->transport_header);
+ key->src = pkt->ip->ip_src;
+ key->dst = pkt->ip->ip_dst;
+ key->src_port = ntohs(tmp_ports & 0xffff);
+ key->dst_port = ntohs(tmp_ports >> 16);
+ break;
+ case IPPROTO_AH:
+ tmp_ports = *(uint32_t *)(pkt->transport_header + 4);
+ key->src = pkt->ip->ip_src;
+ key->dst = pkt->ip->ip_dst;
+ key->src_port = ntohs(tmp_ports & 0xffff);
+ key->dst_port = ntohs(tmp_ports >> 16);
+ break;
+ default:
+ key->src_port = 0;
+ key->dst_port = 0;
+ break;
+ }
+}
+
+Connection *connection_new(ConnectionKey *key)
+{
+ Connection *conn = g_slice_new(Connection);
+
+ conn->ip_proto = key->ip_proto;
+ conn->processing = false;
+ g_queue_init(&conn->primary_list);
+ g_queue_init(&conn->secondary_list);
+
+ return conn;
+}
+
+void connection_destroy(void *opaque)
+{
+ Connection *conn = opaque;
+
+ g_queue_foreach(&conn->primary_list, packet_destroy, NULL);
+ g_queue_free(&conn->primary_list);
+ g_queue_foreach(&conn->secondary_list, packet_destroy, NULL);
+ g_queue_free(&conn->secondary_list);
+ g_slice_free(Connection, conn);
+}
+
Packet *packet_new(const void *data, int size)
{
Packet *pkt = g_slice_new(Packet);
@@ -84,3 +163,33 @@ void connection_hashtable_reset(GHashTable *connection_track_table)
{
g_hash_table_remove_all(connection_track_table);
}
+
+/* if not found, create a new connection and add to hash table */
+Connection *connection_get(GHashTable *connection_track_table,
+ ConnectionKey *key,
+ GQueue *conn_list)
+{
+ Connection *conn = g_hash_table_lookup(connection_track_table, key);
+
+ if (conn == NULL) {
+ ConnectionKey *new_key = g_memdup(key, sizeof(*key));
+
+ conn = connection_new(key);
+
+ if (g_hash_table_size(connection_track_table) > HASHTABLE_MAX_SIZE) {
+ trace_colo_proxy_main("colo proxy connection hashtable full,"
+ " clear it");
+ connection_hashtable_reset(connection_track_table);
+ /*
+ * clear the conn_list
+ */
+ while (!g_queue_is_empty(conn_list)) {
+ connection_destroy(g_queue_pop_head(conn_list));
+ }
+ }
+
+ g_hash_table_insert(connection_track_table, new_key, conn);
+ }
+
+ return conn;
+}
@@ -20,6 +20,18 @@
#define HASHTABLE_MAX_SIZE 16384
+#ifndef IPPROTO_DCCP
+#define IPPROTO_DCCP 33
+#endif
+
+#ifndef IPPROTO_SCTP
+#define IPPROTO_SCTP 132
+#endif
+
+#ifndef IPPROTO_UDPLITE
+#define IPPROTO_UDPLITE 136
+#endif
+
typedef struct Packet {
void *data;
union {
@@ -30,7 +42,34 @@ typedef struct Packet {
int size;
} Packet;
+typedef struct ConnectionKey {
+ /* (src, dst) must be grouped, in the same way than in IP header */
+ struct in_addr src;
+ struct in_addr dst;
+ uint16_t src_port;
+ uint16_t dst_port;
+ uint8_t ip_proto;
+} QEMU_PACKED ConnectionKey;
+
+typedef struct Connection {
+ /* connection primary send queue: element type: Packet */
+ GQueue primary_list;
+ /* connection secondary send queue: element type: Packet */
+ GQueue secondary_list;
+ /* flag to enqueue unprocessed_connections */
+ bool processing;
+ uint8_t ip_proto;
+} Connection;
+
+uint32_t connection_key_hash(const void *opaque);
+int connection_key_equal(const void *opaque1, const void *opaque2);
int parse_packet_early(Packet *pkt);
+void fill_connection_key(Packet *pkt, ConnectionKey *key);
+Connection *connection_new(ConnectionKey *key);
+void connection_destroy(void *opaque);
+Connection *connection_get(GHashTable *connection_track_table,
+ ConnectionKey *key,
+ GQueue *conn_list);
void connection_hashtable_reset(GHashTable *connection_track_table);
Packet *packet_new(const void *data, int size);
void packet_destroy(void *opaque, void *user_data);
In this patch we use kernel jhash table to track connection, and then enqueue net packet like this: + CompareState ++ | | +---------------+ +---------------+ +---------------+ |conn list +--->conn +--------->conn | +---------------+ +---------------+ +---------------+ | | | | | | +---------------+ +---v----+ +---v----+ +---v----+ +---v----+ |primary | |secondary |primary | |secondary |packet | |packet + |packet | |packet + +--------+ +--------+ +--------+ +--------+ | | | | +---v----+ +---v----+ +---v----+ +---v----+ |primary | |secondary |primary | |secondary |packet | |packet + |packet | |packet + +--------+ +--------+ +--------+ +--------+ | | | | +---v----+ +---v----+ +---v----+ +---v----+ |primary | |secondary |primary | |secondary |packet | |packet + |packet | |packet + +--------+ +--------+ +--------+ +--------+ We use conn_list to record connection info. When we want to enqueue a packet, firstly get the connection from connection_track_table. then push the packet to g_queue(pri/sec) in it's own conn. Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> --- net/colo-compare.c | 53 +++++++++++++++++++++----- net/colo.c | 109 +++++++++++++++++++++++++++++++++++++++++++++++++++++ net/colo.h | 39 +++++++++++++++++++ 3 files changed, 191 insertions(+), 10 deletions(-)