1e6eee8abSZhang Chen /*
2e6eee8abSZhang Chen * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
3e6eee8abSZhang Chen * Copyright (c) 2016 FUJITSU LIMITED
4e6eee8abSZhang Chen * Copyright (c) 2016 Intel Corporation
5e6eee8abSZhang Chen *
6e6eee8abSZhang Chen * Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
7e6eee8abSZhang Chen *
8e6eee8abSZhang Chen * This work is licensed under the terms of the GNU GPL, version 2 or
9e6eee8abSZhang Chen * later. See the COPYING file in the top-level directory.
10e6eee8abSZhang Chen */
11e6eee8abSZhang Chen
12e6eee8abSZhang Chen #include "qemu/osdep.h"
1330656b09SZhang Chen #include "trace.h"
14f27f01dbSMichael S. Tsirkin #include "colo.h"
15e6eee8abSZhang Chen #include "net/filter.h"
16e6eee8abSZhang Chen #include "net/net.h"
174b39bdceSZhang Chen #include "qemu/error-report.h"
18e6eee8abSZhang Chen #include "qom/object.h"
19e6eee8abSZhang Chen #include "qemu/main-loop.h"
20e6eee8abSZhang Chen #include "qemu/iov.h"
21e6eee8abSZhang Chen #include "net/checksum.h"
2224525e93SZhang Chen #include "net/colo.h"
2324525e93SZhang Chen #include "migration/colo.h"
24e05ae1d9SMarc-André Lureau #include "util.h"
25e6eee8abSZhang Chen
26e6eee8abSZhang Chen #define TYPE_FILTER_REWRITER "filter-rewriter"
278063396bSEduardo Habkost OBJECT_DECLARE_SIMPLE_TYPE(RewriterState, FILTER_REWRITER)
28e6eee8abSZhang Chen
2924525e93SZhang Chen #define FAILOVER_MODE_ON true
3024525e93SZhang Chen #define FAILOVER_MODE_OFF false
31e6eee8abSZhang Chen
32db1015e9SEduardo Habkost struct RewriterState {
33e6eee8abSZhang Chen NetFilterState parent_obj;
34e6eee8abSZhang Chen NetQueue *incoming_queue;
35e6eee8abSZhang Chen /* hashtable to save connection */
36e6eee8abSZhang Chen GHashTable *connection_track_table;
374b39bdceSZhang Chen bool vnet_hdr;
3824525e93SZhang Chen bool failover_mode;
39db1015e9SEduardo Habkost };
40e6eee8abSZhang Chen
filter_rewriter_failover_mode(RewriterState * s)4124525e93SZhang Chen static void filter_rewriter_failover_mode(RewriterState *s)
4224525e93SZhang Chen {
4324525e93SZhang Chen s->failover_mode = FAILOVER_MODE_ON;
4424525e93SZhang Chen }
4524525e93SZhang Chen
filter_rewriter_flush(NetFilterState * nf)46e6eee8abSZhang Chen static void filter_rewriter_flush(NetFilterState *nf)
47e6eee8abSZhang Chen {
4850cd7d54SEduardo Habkost RewriterState *s = FILTER_REWRITER(nf);
49e6eee8abSZhang Chen
50e6eee8abSZhang Chen if (!qemu_net_queue_flush(s->incoming_queue)) {
51e6eee8abSZhang Chen /* Unable to empty the queue, purge remaining packets */
52e6eee8abSZhang Chen qemu_net_queue_purge(s->incoming_queue, nf->netdev);
53e6eee8abSZhang Chen }
54e6eee8abSZhang Chen }
55e6eee8abSZhang Chen
56afe46124SZhang Chen /*
57afe46124SZhang Chen * Return 1 on success, if return 0 means the pkt
58afe46124SZhang Chen * is not TCP packet
59afe46124SZhang Chen */
is_tcp_packet(Packet * pkt)60afe46124SZhang Chen static int is_tcp_packet(Packet *pkt)
61afe46124SZhang Chen {
62afe46124SZhang Chen if (!parse_packet_early(pkt) &&
63afe46124SZhang Chen pkt->ip->ip_p == IPPROTO_TCP) {
64afe46124SZhang Chen return 1;
65afe46124SZhang Chen } else {
66afe46124SZhang Chen return 0;
67afe46124SZhang Chen }
68afe46124SZhang Chen }
69afe46124SZhang Chen
7030656b09SZhang Chen /* handle tcp packet from primary guest */
handle_primary_tcp_pkt(RewriterState * rf,Connection * conn,Packet * pkt,ConnectionKey * key)716214231aSZhang Chen static int handle_primary_tcp_pkt(RewriterState *rf,
7230656b09SZhang Chen Connection *conn,
736214231aSZhang Chen Packet *pkt, ConnectionKey *key)
7430656b09SZhang Chen {
75e05ae1d9SMarc-André Lureau struct tcp_hdr *tcp_pkt;
7630656b09SZhang Chen
77e05ae1d9SMarc-André Lureau tcp_pkt = (struct tcp_hdr *)pkt->transport_header;
788c8ed038SRoman Bolshakov if (trace_event_get_state_backends(TRACE_COLO_FILTER_REWRITER_PKT_INFO)) {
792061c14cSZhang Chen trace_colo_filter_rewriter_pkt_info(__func__,
802061c14cSZhang Chen inet_ntoa(pkt->ip->ip_src), inet_ntoa(pkt->ip->ip_dst),
8130656b09SZhang Chen ntohl(tcp_pkt->th_seq), ntohl(tcp_pkt->th_ack),
8230656b09SZhang Chen tcp_pkt->th_flags);
838c8ed038SRoman Bolshakov }
848c8ed038SRoman Bolshakov if (trace_event_get_state_backends(
858c8ed038SRoman Bolshakov TRACE_COLO_FILTER_REWRITER_CONN_OFFSET)) {
8630656b09SZhang Chen trace_colo_filter_rewriter_conn_offset(conn->offset);
8730656b09SZhang Chen }
8830656b09SZhang Chen
896214231aSZhang Chen if (((tcp_pkt->th_flags & (TH_ACK | TH_SYN)) == (TH_ACK | TH_SYN)) &&
906214231aSZhang Chen conn->tcp_state == TCPS_SYN_SENT) {
916214231aSZhang Chen conn->tcp_state = TCPS_ESTABLISHED;
926214231aSZhang Chen }
936214231aSZhang Chen
9430656b09SZhang Chen if (((tcp_pkt->th_flags & (TH_ACK | TH_SYN)) == TH_SYN)) {
9530656b09SZhang Chen /*
9630656b09SZhang Chen * we use this flag update offset func
9730656b09SZhang Chen * run once in independent tcp connection
9830656b09SZhang Chen */
996214231aSZhang Chen conn->tcp_state = TCPS_SYN_RECEIVED;
10030656b09SZhang Chen }
10130656b09SZhang Chen
10230656b09SZhang Chen if (((tcp_pkt->th_flags & (TH_ACK | TH_SYN)) == TH_ACK)) {
1036214231aSZhang Chen if (conn->tcp_state == TCPS_SYN_RECEIVED) {
10430656b09SZhang Chen /*
10530656b09SZhang Chen * offset = secondary_seq - primary seq
10630656b09SZhang Chen * ack packet sent by guest from primary node,
10730656b09SZhang Chen * so we use th_ack - 1 get primary_seq
10830656b09SZhang Chen */
10930656b09SZhang Chen conn->offset -= (ntohl(tcp_pkt->th_ack) - 1);
1106214231aSZhang Chen conn->tcp_state = TCPS_ESTABLISHED;
11130656b09SZhang Chen }
112db0a762eSzhanghailiang if (conn->offset) {
11330656b09SZhang Chen /* handle packets to the secondary from the primary */
11430656b09SZhang Chen tcp_pkt->th_ack = htonl(ntohl(tcp_pkt->th_ack) + conn->offset);
11530656b09SZhang Chen
1166ce310b5SZhang Chen net_checksum_calculate((uint8_t *)pkt->data + pkt->vnet_hdr_len,
117f5746335SBin Meng pkt->size - pkt->vnet_hdr_len, CSUM_TCP);
11830656b09SZhang Chen }
1196214231aSZhang Chen
1206214231aSZhang Chen /*
1216214231aSZhang Chen * Passive close step 3
1226214231aSZhang Chen */
1236214231aSZhang Chen if ((conn->tcp_state == TCPS_LAST_ACK) &&
1246214231aSZhang Chen (ntohl(tcp_pkt->th_ack) == (conn->fin_ack_seq + 1))) {
1256214231aSZhang Chen conn->tcp_state = TCPS_CLOSED;
1266214231aSZhang Chen g_hash_table_remove(rf->connection_track_table, key);
1276214231aSZhang Chen }
1286214231aSZhang Chen }
1296214231aSZhang Chen
1306214231aSZhang Chen if ((tcp_pkt->th_flags & TH_FIN) == TH_FIN) {
1316214231aSZhang Chen /*
1326214231aSZhang Chen * Passive close.
1336214231aSZhang Chen * Step 1:
1346214231aSZhang Chen * The *server* side of this connect is VM, *client* tries to close
1356214231aSZhang Chen * the connection. We will into CLOSE_WAIT status.
1366214231aSZhang Chen *
1376214231aSZhang Chen * Step 2:
1386214231aSZhang Chen * In this step we will into LAST_ACK status.
1396214231aSZhang Chen *
1406214231aSZhang Chen * We got 'fin=1, ack=1' packet from server side, we need to
1416214231aSZhang Chen * record the seq of 'fin=1, ack=1' packet.
1426214231aSZhang Chen *
1436214231aSZhang Chen * Step 3:
1446214231aSZhang Chen * We got 'ack=1' packets from client side, it acks 'fin=1, ack=1'
1456214231aSZhang Chen * packet from server side. From this point, we can ensure that there
1466214231aSZhang Chen * will be no packets in the connection, except that, some errors
1476214231aSZhang Chen * happen between the path of 'filter object' and vNIC, if this rare
1486214231aSZhang Chen * case really happen, we can still create a new connection,
1496214231aSZhang Chen * So it is safe to remove the connection from connection_track_table.
1506214231aSZhang Chen *
1516214231aSZhang Chen */
1526214231aSZhang Chen if (conn->tcp_state == TCPS_ESTABLISHED) {
1536214231aSZhang Chen conn->tcp_state = TCPS_CLOSE_WAIT;
1546214231aSZhang Chen }
1556214231aSZhang Chen
1566214231aSZhang Chen /*
1576214231aSZhang Chen * Active close step 2.
1586214231aSZhang Chen */
1596214231aSZhang Chen if (conn->tcp_state == TCPS_FIN_WAIT_1) {
1606214231aSZhang Chen /*
1616214231aSZhang Chen * For simplify implementation, we needn't wait 2MSL time
1626214231aSZhang Chen * in filter rewriter. Because guest kernel will track the
1636214231aSZhang Chen * TCP status and wait 2MSL time, if client resend the FIN
1646214231aSZhang Chen * packet, guest will apply the last ACK too.
165013a6202SZhang Chen * So, we skip the TCPS_TIME_WAIT state here and go straight
166013a6202SZhang Chen * to TCPS_CLOSED state.
1676214231aSZhang Chen */
1686214231aSZhang Chen conn->tcp_state = TCPS_CLOSED;
1696214231aSZhang Chen g_hash_table_remove(rf->connection_track_table, key);
1706214231aSZhang Chen }
171db0a762eSzhanghailiang }
17230656b09SZhang Chen
17330656b09SZhang Chen return 0;
17430656b09SZhang Chen }
17530656b09SZhang Chen
17630656b09SZhang Chen /* handle tcp packet from secondary guest */
handle_secondary_tcp_pkt(RewriterState * rf,Connection * conn,Packet * pkt,ConnectionKey * key)1776214231aSZhang Chen static int handle_secondary_tcp_pkt(RewriterState *rf,
17830656b09SZhang Chen Connection *conn,
1796214231aSZhang Chen Packet *pkt, ConnectionKey *key)
18030656b09SZhang Chen {
181e05ae1d9SMarc-André Lureau struct tcp_hdr *tcp_pkt;
18230656b09SZhang Chen
183e05ae1d9SMarc-André Lureau tcp_pkt = (struct tcp_hdr *)pkt->transport_header;
18430656b09SZhang Chen
1858c8ed038SRoman Bolshakov if (trace_event_get_state_backends(TRACE_COLO_FILTER_REWRITER_PKT_INFO)) {
1862061c14cSZhang Chen trace_colo_filter_rewriter_pkt_info(__func__,
1872061c14cSZhang Chen inet_ntoa(pkt->ip->ip_src), inet_ntoa(pkt->ip->ip_dst),
18830656b09SZhang Chen ntohl(tcp_pkt->th_seq), ntohl(tcp_pkt->th_ack),
18930656b09SZhang Chen tcp_pkt->th_flags);
1908c8ed038SRoman Bolshakov }
1918c8ed038SRoman Bolshakov if (trace_event_get_state_backends(
1928c8ed038SRoman Bolshakov TRACE_COLO_FILTER_REWRITER_CONN_OFFSET)) {
19330656b09SZhang Chen trace_colo_filter_rewriter_conn_offset(conn->offset);
19430656b09SZhang Chen }
19530656b09SZhang Chen
1966214231aSZhang Chen if (conn->tcp_state == TCPS_SYN_RECEIVED &&
1976214231aSZhang Chen ((tcp_pkt->th_flags & (TH_ACK | TH_SYN)) == (TH_ACK | TH_SYN))) {
19830656b09SZhang Chen /*
19930656b09SZhang Chen * save offset = secondary_seq and then
20030656b09SZhang Chen * in handle_primary_tcp_pkt make offset
20130656b09SZhang Chen * = secondary_seq - primary_seq
20230656b09SZhang Chen */
20330656b09SZhang Chen conn->offset = ntohl(tcp_pkt->th_seq);
20430656b09SZhang Chen }
20530656b09SZhang Chen
2066214231aSZhang Chen /* VM active connect */
2076214231aSZhang Chen if (conn->tcp_state == TCPS_CLOSED &&
2086214231aSZhang Chen ((tcp_pkt->th_flags & (TH_ACK | TH_SYN)) == TH_SYN)) {
2096214231aSZhang Chen conn->tcp_state = TCPS_SYN_SENT;
2106214231aSZhang Chen }
2116214231aSZhang Chen
21230656b09SZhang Chen if ((tcp_pkt->th_flags & (TH_ACK | TH_SYN)) == TH_ACK) {
213db0a762eSzhanghailiang /* Only need to adjust seq while offset is Non-zero */
214db0a762eSzhanghailiang if (conn->offset) {
21530656b09SZhang Chen /* handle packets to the primary from the secondary*/
21630656b09SZhang Chen tcp_pkt->th_seq = htonl(ntohl(tcp_pkt->th_seq) - conn->offset);
21730656b09SZhang Chen
2186ce310b5SZhang Chen net_checksum_calculate((uint8_t *)pkt->data + pkt->vnet_hdr_len,
219f5746335SBin Meng pkt->size - pkt->vnet_hdr_len, CSUM_TCP);
22030656b09SZhang Chen }
221db0a762eSzhanghailiang }
22230656b09SZhang Chen
2236214231aSZhang Chen /*
2246214231aSZhang Chen * Passive close step 2:
2256214231aSZhang Chen */
2266214231aSZhang Chen if (conn->tcp_state == TCPS_CLOSE_WAIT &&
2276214231aSZhang Chen (tcp_pkt->th_flags & (TH_ACK | TH_FIN)) == (TH_ACK | TH_FIN)) {
2286214231aSZhang Chen conn->fin_ack_seq = ntohl(tcp_pkt->th_seq);
2296214231aSZhang Chen conn->tcp_state = TCPS_LAST_ACK;
2306214231aSZhang Chen }
2316214231aSZhang Chen
2326214231aSZhang Chen /*
2336214231aSZhang Chen * Active close
2346214231aSZhang Chen *
2356214231aSZhang Chen * Step 1:
2366214231aSZhang Chen * The *server* side of this connect is VM, *server* tries to close
2376214231aSZhang Chen * the connection.
2386214231aSZhang Chen *
2396214231aSZhang Chen * Step 2:
2406214231aSZhang Chen * We will into CLOSE_WAIT status.
2416214231aSZhang Chen * We simplify the TCPS_FIN_WAIT_2, TCPS_TIME_WAIT and
2426214231aSZhang Chen * CLOSING status.
2436214231aSZhang Chen */
2446214231aSZhang Chen if (conn->tcp_state == TCPS_ESTABLISHED &&
2456214231aSZhang Chen (tcp_pkt->th_flags & (TH_ACK | TH_FIN)) == TH_FIN) {
2466214231aSZhang Chen conn->tcp_state = TCPS_FIN_WAIT_1;
2476214231aSZhang Chen }
2486214231aSZhang Chen
24930656b09SZhang Chen return 0;
25030656b09SZhang Chen }
25130656b09SZhang Chen
colo_rewriter_receive_iov(NetFilterState * nf,NetClientState * sender,unsigned flags,const struct iovec * iov,int iovcnt,NetPacketSent * sent_cb)252e6eee8abSZhang Chen static ssize_t colo_rewriter_receive_iov(NetFilterState *nf,
253e6eee8abSZhang Chen NetClientState *sender,
254e6eee8abSZhang Chen unsigned flags,
255e6eee8abSZhang Chen const struct iovec *iov,
256e6eee8abSZhang Chen int iovcnt,
257e6eee8abSZhang Chen NetPacketSent *sent_cb)
258e6eee8abSZhang Chen {
25950cd7d54SEduardo Habkost RewriterState *s = FILTER_REWRITER(nf);
260afe46124SZhang Chen Connection *conn;
261afe46124SZhang Chen ConnectionKey key;
262afe46124SZhang Chen Packet *pkt;
263afe46124SZhang Chen ssize_t size = iov_size(iov, iovcnt);
2644b39bdceSZhang Chen ssize_t vnet_hdr_len = 0;
265afe46124SZhang Chen char *buf = g_malloc0(size);
266afe46124SZhang Chen
267afe46124SZhang Chen iov_to_buf(iov, iovcnt, 0, buf, size);
2684b39bdceSZhang Chen
2694b39bdceSZhang Chen if (s->vnet_hdr) {
2704b39bdceSZhang Chen vnet_hdr_len = nf->netdev->vnet_hdr_len;
2714b39bdceSZhang Chen }
2724b39bdceSZhang Chen
2739b492719SRao, Lei pkt = packet_new_nocopy(buf, size, vnet_hdr_len);
274afe46124SZhang Chen
275e6eee8abSZhang Chen /*
276e6eee8abSZhang Chen * if we get tcp packet
277e6eee8abSZhang Chen * we will rewrite it to make secondary guest's
278e6eee8abSZhang Chen * connection established successfully
279e6eee8abSZhang Chen */
280afe46124SZhang Chen if (pkt && is_tcp_packet(pkt)) {
281afe46124SZhang Chen
28264153ca6SRao, Lei fill_connection_key(pkt, &key, sender == nf->netdev);
28324525e93SZhang Chen
28424525e93SZhang Chen /* After failover we needn't change new TCP packet */
28524525e93SZhang Chen if (s->failover_mode &&
28624525e93SZhang Chen !connection_has_tracked(s->connection_track_table, &key)) {
28724525e93SZhang Chen goto out;
28824525e93SZhang Chen }
28924525e93SZhang Chen
290afe46124SZhang Chen conn = connection_get(s->connection_track_table,
291afe46124SZhang Chen &key,
292afe46124SZhang Chen NULL);
293afe46124SZhang Chen
294afe46124SZhang Chen if (sender == nf->netdev) {
295afe46124SZhang Chen /* NET_FILTER_DIRECTION_TX */
2966214231aSZhang Chen if (!handle_primary_tcp_pkt(s, conn, pkt, &key)) {
29730656b09SZhang Chen qemu_net_queue_send(s->incoming_queue, sender, 0,
29830656b09SZhang Chen (const uint8_t *)pkt->data, pkt->size, NULL);
29930656b09SZhang Chen packet_destroy(pkt, NULL);
30030656b09SZhang Chen pkt = NULL;
30130656b09SZhang Chen /*
30230656b09SZhang Chen * We block the packet here,after rewrite pkt
30330656b09SZhang Chen * and will send it
30430656b09SZhang Chen */
30530656b09SZhang Chen return 1;
30630656b09SZhang Chen }
307afe46124SZhang Chen } else {
308afe46124SZhang Chen /* NET_FILTER_DIRECTION_RX */
3096214231aSZhang Chen if (!handle_secondary_tcp_pkt(s, conn, pkt, &key)) {
31030656b09SZhang Chen qemu_net_queue_send(s->incoming_queue, sender, 0,
31130656b09SZhang Chen (const uint8_t *)pkt->data, pkt->size, NULL);
31230656b09SZhang Chen packet_destroy(pkt, NULL);
31330656b09SZhang Chen pkt = NULL;
31430656b09SZhang Chen /*
31530656b09SZhang Chen * We block the packet here,after rewrite pkt
31630656b09SZhang Chen * and will send it
31730656b09SZhang Chen */
31830656b09SZhang Chen return 1;
31930656b09SZhang Chen }
320afe46124SZhang Chen }
321afe46124SZhang Chen }
322afe46124SZhang Chen
32324525e93SZhang Chen out:
324afe46124SZhang Chen packet_destroy(pkt, NULL);
325afe46124SZhang Chen pkt = NULL;
326e6eee8abSZhang Chen return 0;
327e6eee8abSZhang Chen }
328e6eee8abSZhang Chen
reset_seq_offset(gpointer key,gpointer value,gpointer user_data)32924525e93SZhang Chen static void reset_seq_offset(gpointer key, gpointer value, gpointer user_data)
33024525e93SZhang Chen {
33124525e93SZhang Chen Connection *conn = (Connection *)value;
33224525e93SZhang Chen
33324525e93SZhang Chen conn->offset = 0;
33424525e93SZhang Chen }
33524525e93SZhang Chen
offset_is_nonzero(gpointer key,gpointer value,gpointer user_data)33624525e93SZhang Chen static gboolean offset_is_nonzero(gpointer key,
33724525e93SZhang Chen gpointer value,
33824525e93SZhang Chen gpointer user_data)
33924525e93SZhang Chen {
34024525e93SZhang Chen Connection *conn = (Connection *)value;
34124525e93SZhang Chen
34224525e93SZhang Chen return conn->offset ? true : false;
34324525e93SZhang Chen }
34424525e93SZhang Chen
colo_rewriter_handle_event(NetFilterState * nf,int event,Error ** errp)34524525e93SZhang Chen static void colo_rewriter_handle_event(NetFilterState *nf, int event,
34624525e93SZhang Chen Error **errp)
34724525e93SZhang Chen {
34850cd7d54SEduardo Habkost RewriterState *rs = FILTER_REWRITER(nf);
34924525e93SZhang Chen
35024525e93SZhang Chen switch (event) {
35124525e93SZhang Chen case COLO_EVENT_CHECKPOINT:
35224525e93SZhang Chen g_hash_table_foreach(rs->connection_track_table,
35324525e93SZhang Chen reset_seq_offset, NULL);
35424525e93SZhang Chen break;
35524525e93SZhang Chen case COLO_EVENT_FAILOVER:
35624525e93SZhang Chen if (!g_hash_table_find(rs->connection_track_table,
35724525e93SZhang Chen offset_is_nonzero, NULL)) {
35824525e93SZhang Chen filter_rewriter_failover_mode(rs);
35924525e93SZhang Chen }
36024525e93SZhang Chen break;
36124525e93SZhang Chen default:
36224525e93SZhang Chen break;
36324525e93SZhang Chen }
36424525e93SZhang Chen }
36524525e93SZhang Chen
colo_rewriter_cleanup(NetFilterState * nf)366e6eee8abSZhang Chen static void colo_rewriter_cleanup(NetFilterState *nf)
367e6eee8abSZhang Chen {
36850cd7d54SEduardo Habkost RewriterState *s = FILTER_REWRITER(nf);
369e6eee8abSZhang Chen
370e6eee8abSZhang Chen /* flush packets */
371e6eee8abSZhang Chen if (s->incoming_queue) {
372e6eee8abSZhang Chen filter_rewriter_flush(nf);
373e6eee8abSZhang Chen g_free(s->incoming_queue);
374e6eee8abSZhang Chen }
375b492a4b8SPan Nengyuan
376b492a4b8SPan Nengyuan g_hash_table_destroy(s->connection_track_table);
377e6eee8abSZhang Chen }
378e6eee8abSZhang Chen
colo_rewriter_setup(NetFilterState * nf,Error ** errp)379e6eee8abSZhang Chen static void colo_rewriter_setup(NetFilterState *nf, Error **errp)
380e6eee8abSZhang Chen {
38150cd7d54SEduardo Habkost RewriterState *s = FILTER_REWRITER(nf);
382e6eee8abSZhang Chen
383e6eee8abSZhang Chen s->connection_track_table = g_hash_table_new_full(connection_key_hash,
384e6eee8abSZhang Chen connection_key_equal,
385e6eee8abSZhang Chen g_free,
386*a18d4369SZhang Chen NULL);
387e6eee8abSZhang Chen s->incoming_queue = qemu_new_net_queue(qemu_netfilter_pass_to_next, nf);
388e6eee8abSZhang Chen }
389e6eee8abSZhang Chen
filter_rewriter_get_vnet_hdr(Object * obj,Error ** errp)3904b39bdceSZhang Chen static bool filter_rewriter_get_vnet_hdr(Object *obj, Error **errp)
3914b39bdceSZhang Chen {
39250cd7d54SEduardo Habkost RewriterState *s = FILTER_REWRITER(obj);
3934b39bdceSZhang Chen
3944b39bdceSZhang Chen return s->vnet_hdr;
3954b39bdceSZhang Chen }
3964b39bdceSZhang Chen
filter_rewriter_set_vnet_hdr(Object * obj,bool value,Error ** errp)3974b39bdceSZhang Chen static void filter_rewriter_set_vnet_hdr(Object *obj,
3984b39bdceSZhang Chen bool value,
3994b39bdceSZhang Chen Error **errp)
4004b39bdceSZhang Chen {
40150cd7d54SEduardo Habkost RewriterState *s = FILTER_REWRITER(obj);
4024b39bdceSZhang Chen
4034b39bdceSZhang Chen s->vnet_hdr = value;
4044b39bdceSZhang Chen }
4054b39bdceSZhang Chen
filter_rewriter_init(Object * obj)4064b39bdceSZhang Chen static void filter_rewriter_init(Object *obj)
4074b39bdceSZhang Chen {
40850cd7d54SEduardo Habkost RewriterState *s = FILTER_REWRITER(obj);
4094b39bdceSZhang Chen
4104b39bdceSZhang Chen s->vnet_hdr = false;
41124525e93SZhang Chen s->failover_mode = FAILOVER_MODE_OFF;
4124b39bdceSZhang Chen }
4134b39bdceSZhang Chen
colo_rewriter_class_init(ObjectClass * oc,void * data)414e6eee8abSZhang Chen static void colo_rewriter_class_init(ObjectClass *oc, void *data)
415e6eee8abSZhang Chen {
416e6eee8abSZhang Chen NetFilterClass *nfc = NETFILTER_CLASS(oc);
417e6eee8abSZhang Chen
418f0e34a06SEduardo Habkost object_class_property_add_bool(oc, "vnet_hdr_support",
419f0e34a06SEduardo Habkost filter_rewriter_get_vnet_hdr,
420f0e34a06SEduardo Habkost filter_rewriter_set_vnet_hdr);
421f0e34a06SEduardo Habkost
422e6eee8abSZhang Chen nfc->setup = colo_rewriter_setup;
423e6eee8abSZhang Chen nfc->cleanup = colo_rewriter_cleanup;
424e6eee8abSZhang Chen nfc->receive_iov = colo_rewriter_receive_iov;
42524525e93SZhang Chen nfc->handle_event = colo_rewriter_handle_event;
426e6eee8abSZhang Chen }
427e6eee8abSZhang Chen
428e6eee8abSZhang Chen static const TypeInfo colo_rewriter_info = {
429e6eee8abSZhang Chen .name = TYPE_FILTER_REWRITER,
430e6eee8abSZhang Chen .parent = TYPE_NETFILTER,
431e6eee8abSZhang Chen .class_init = colo_rewriter_class_init,
4324b39bdceSZhang Chen .instance_init = filter_rewriter_init,
433e6eee8abSZhang Chen .instance_size = sizeof(RewriterState),
434e6eee8abSZhang Chen };
435e6eee8abSZhang Chen
register_types(void)436e6eee8abSZhang Chen static void register_types(void)
437e6eee8abSZhang Chen {
438e6eee8abSZhang Chen type_register_static(&colo_rewriter_info);
439e6eee8abSZhang Chen }
440e6eee8abSZhang Chen
441e6eee8abSZhang Chen type_init(register_types);
442