From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36439) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bZvz0-0005cX-JT for qemu-devel@nongnu.org; Wed, 17 Aug 2016 04:13:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bZvyx-0002a0-Tl for qemu-devel@nongnu.org; Wed, 17 Aug 2016 04:13:53 -0400 Received: from [59.151.112.132] (port=19730 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bZvyv-0002Yy-7f for qemu-devel@nongnu.org; Wed, 17 Aug 2016 04:13:51 -0400 From: Zhang Chen Date: Wed, 17 Aug 2016 16:10:23 +0800 Message-ID: <1471421428-26379-6-git-send-email-zhangchen.fnst@cn.fujitsu.com> In-Reply-To: <1471421428-26379-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1471421428-26379-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH V12 05/10] colo-compare: track connection and enqueue packet List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu devel , Jason Wang Cc: Zhang Chen , Li Zhijian , Wen Congyang , zhanghailiang , "eddie . dong" , "Dr . David Alan Gilbert" 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 Signed-off-by: Li Zhijian Signed-off-by: Wen Congyang --- net/colo-compare.c | 51 ++++++++++++++++++----- net/colo.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++++ net/colo.h | 27 +++++++++++++ 3 files changed, 185 insertions(+), 10 deletions(-) diff --git a/net/colo-compare.c b/net/colo-compare.c index d9e4459..bab215b 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -72,6 +72,11 @@ 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; @@ -100,7 +105,9 @@ 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); @@ -113,17 +120,34 @@ 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; } @@ -325,7 +349,12 @@ 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; } @@ -366,6 +395,8 @@ 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); diff --git a/net/colo.c b/net/colo.c index 4daedd4..bc86553 100644 --- a/net/colo.c +++ b/net/colo.c @@ -16,6 +16,29 @@ #include "qemu/error-report.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; @@ -43,6 +66,62 @@ 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); @@ -68,3 +147,41 @@ void connection_hashtable_reset(GHashTable *connection_track_table) { g_hash_table_remove_all(connection_track_table); } + +static void colo_rm_connection(void *opaque, void *user_data) +{ + connection_destroy(opaque); +} + +/* 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); + static uint32_t hashtable_size; + + if (conn == NULL) { + ConnectionKey *new_key = g_memdup(key, sizeof(*key)); + + conn = connection_new(key); + + hashtable_size += 1; + if (hashtable_size > HASHTABLE_MAX_SIZE) { + error_report("colo proxy connection hashtable full, clear it"); + connection_hashtable_reset(connection_track_table); + /* + * clear the conn_list + */ + if (conn_list) { + g_queue_foreach(conn_list, colo_rm_connection, NULL); + } + + hashtable_size = 0; + } + + g_hash_table_insert(connection_track_table, new_key, conn); + } + + return conn; +} diff --git a/net/colo.h b/net/colo.h index 8559f28..9cbc14e 100644 --- a/net/colo.h +++ b/net/colo.h @@ -30,7 +30,34 @@ 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); -- 2.7.4