GHashTable *connection_track_table;
/* compare thread, a thread for each NIC */
QemuThread thread;
- /* Timer used on the primary to find packets that are never matched */
- QEMUTimer *timer;
- QemuMutex timer_check_lock;
+
+ GMainContext *worker_context;
+ GMainLoop *compare_loop;
} CompareState;
typedef struct CompareClass {
ObjectClass parent_class;
} CompareClass;
-typedef struct CompareChardevProps {
- bool is_socket;
-} CompareChardevProps;
-
enum {
PRIMARY_IN = 0,
SECONDARY_IN,
const uint8_t *buf,
uint32_t size);
+static gint seq_sorter(Packet *a, Packet *b, gpointer data)
+{
+ struct tcphdr *atcp, *btcp;
+
+ atcp = (struct tcphdr *)(a->transport_header);
+ btcp = (struct tcphdr *)(b->transport_header);
+ return ntohl(atcp->th_seq) - ntohl(btcp->th_seq);
+}
+
/*
* Return 0 on success, if return -1 means the pkt
* is unsupported(arp and ipv6) and will be sent later
if (g_queue_get_length(&conn->primary_list) <=
MAX_QUEUE_SIZE) {
g_queue_push_tail(&conn->primary_list, pkt);
+ if (conn->ip_proto == IPPROTO_TCP) {
+ g_queue_sort(&conn->primary_list,
+ (GCompareDataFunc)seq_sorter,
+ NULL);
+ }
} else {
error_report("colo compare primary queue size too big,"
"drop packet");
if (g_queue_get_length(&conn->secondary_list) <=
MAX_QUEUE_SIZE) {
g_queue_push_tail(&conn->secondary_list, pkt);
+ if (conn->ip_proto == IPPROTO_TCP) {
+ g_queue_sort(&conn->secondary_list,
+ (GCompareDataFunc)seq_sorter,
+ NULL);
+ }
} else {
error_report("colo compare secondary queue size too big,"
"drop packet");
* return: 0 means packet same
* > 0 || < 0 means packet different
*/
-static int colo_packet_compare(Packet *ppkt, Packet *spkt)
+static int colo_packet_compare_common(Packet *ppkt, Packet *spkt, int offset)
{
- trace_colo_compare_ip_info(ppkt->size, inet_ntoa(ppkt->ip->ip_src),
- inet_ntoa(ppkt->ip->ip_dst), spkt->size,
- inet_ntoa(spkt->ip->ip_src),
- inet_ntoa(spkt->ip->ip_dst));
+ if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) {
+ char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20];
+
+ strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src));
+ strcpy(pri_ip_dst, inet_ntoa(ppkt->ip->ip_dst));
+ strcpy(sec_ip_src, inet_ntoa(spkt->ip->ip_src));
+ strcpy(sec_ip_dst, inet_ntoa(spkt->ip->ip_dst));
+
+ trace_colo_compare_ip_info(ppkt->size, pri_ip_src,
+ pri_ip_dst, spkt->size,
+ sec_ip_src, sec_ip_dst);
+ }
if (ppkt->size == spkt->size) {
- return memcmp(ppkt->data, spkt->data, spkt->size);
+ return memcmp(ppkt->data + offset, spkt->data + offset,
+ spkt->size - offset);
} else {
+ trace_colo_compare_main("Net packet size are not the same");
return -1;
}
}
int res;
trace_colo_compare_main("compare tcp");
- if (ppkt->size != spkt->size) {
- if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) {
- trace_colo_compare_main("pkt size not same");
- }
- return -1;
- }
ptcp = (struct tcphdr *)ppkt->transport_header;
stcp = (struct tcphdr *)spkt->transport_header;
spkt->ip->ip_sum = ppkt->ip->ip_sum;
}
- res = memcmp(ppkt->data + ETH_HLEN, spkt->data + ETH_HLEN,
- (spkt->size - ETH_HLEN));
+ if (ptcp->th_sum == stcp->th_sum) {
+ res = colo_packet_compare_common(ppkt, spkt, ETH_HLEN);
+ } else {
+ res = -1;
+ }
if (res != 0 && trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) {
- trace_colo_compare_pkt_info(inet_ntoa(ppkt->ip->ip_src),
- inet_ntoa(ppkt->ip->ip_dst),
- ntohl(ptcp->th_seq),
- ntohl(ptcp->th_ack),
- ntohl(stcp->th_seq),
- ntohl(stcp->th_ack),
- res, ptcp->th_flags,
- stcp->th_flags,
- ppkt->size,
- spkt->size);
+ trace_colo_compare_pkt_info_src(inet_ntoa(ppkt->ip->ip_src),
+ ntohl(stcp->th_seq),
+ ntohl(stcp->th_ack),
+ res, stcp->th_flags,
+ spkt->size);
+
+ trace_colo_compare_pkt_info_dst(inet_ntoa(ppkt->ip->ip_dst),
+ ntohl(ptcp->th_seq),
+ ntohl(ptcp->th_ack),
+ res, ptcp->th_flags,
+ ppkt->size);
qemu_hexdump((char *)ppkt->data, stderr,
"colo-compare ppkt", ppkt->size);
static int colo_packet_compare_udp(Packet *spkt, Packet *ppkt)
{
int ret;
+ int network_header_length = ppkt->ip->ip_hl * 4;
trace_colo_compare_main("compare udp");
- ret = colo_packet_compare(ppkt, spkt);
+
+ /*
+ * Because of ppkt and spkt are both in the same connection,
+ * The ppkt's src ip, dst ip, src port, dst port, ip_proto all are
+ * same with spkt. In addition, IP header's Identification is a random
+ * field, we can handle it in IP fragmentation function later.
+ * COLO just concern the response net packet payload from primary guest
+ * and secondary guest are same or not, So we ignored all IP header include
+ * other field like TOS,TTL,IP Checksum. we only need to compare
+ * the ip payload here.
+ */
+ ret = colo_packet_compare_common(ppkt, spkt,
+ network_header_length + ETH_HLEN);
if (ret) {
trace_colo_compare_udp_miscompare("primary pkt size", ppkt->size);
- qemu_hexdump((char *)ppkt->data, stderr, "colo-compare", ppkt->size);
trace_colo_compare_udp_miscompare("Secondary pkt size", spkt->size);
- qemu_hexdump((char *)spkt->data, stderr, "colo-compare", spkt->size);
+ if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) {
+ qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt",
+ ppkt->size);
+ qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt",
+ spkt->size);
+ }
}
return ret;
*/
static int colo_packet_compare_icmp(Packet *spkt, Packet *ppkt)
{
- int network_length;
+ int network_header_length = ppkt->ip->ip_hl * 4;
trace_colo_compare_main("compare icmp");
- network_length = ppkt->ip->ip_hl * 4;
- if (ppkt->size != spkt->size ||
- ppkt->size < network_length + ETH_HLEN) {
- return -1;
- }
- if (colo_packet_compare(ppkt, spkt)) {
+ /*
+ * Because of ppkt and spkt are both in the same connection,
+ * The ppkt's src ip, dst ip, src port, dst port, ip_proto all are
+ * same with spkt. In addition, IP header's Identification is a random
+ * field, we can handle it in IP fragmentation function later.
+ * COLO just concern the response net packet payload from primary guest
+ * and secondary guest are same or not, So we ignored all IP header include
+ * other field like TOS,TTL,IP Checksum. we only need to compare
+ * the ip payload here.
+ */
+ if (colo_packet_compare_common(ppkt, spkt,
+ network_header_length + ETH_HLEN)) {
trace_colo_compare_icmp_miscompare("primary pkt size",
ppkt->size);
- qemu_hexdump((char *)ppkt->data, stderr, "colo-compare",
- ppkt->size);
trace_colo_compare_icmp_miscompare("Secondary pkt size",
spkt->size);
- qemu_hexdump((char *)spkt->data, stderr, "colo-compare",
- spkt->size);
+ if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) {
+ qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt",
+ ppkt->size);
+ qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt",
+ spkt->size);
+ }
return -1;
} else {
return 0;
static int colo_packet_compare_other(Packet *spkt, Packet *ppkt)
{
trace_colo_compare_main("compare other");
- trace_colo_compare_ip_info(ppkt->size, inet_ntoa(ppkt->ip->ip_src),
- inet_ntoa(ppkt->ip->ip_dst), spkt->size,
- inet_ntoa(spkt->ip->ip_src),
- inet_ntoa(spkt->ip->ip_dst));
- return colo_packet_compare(ppkt, spkt);
+ if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) {
+ char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20];
+
+ strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src));
+ strcpy(pri_ip_dst, inet_ntoa(ppkt->ip->ip_dst));
+ strcpy(sec_ip_src, inet_ntoa(spkt->ip->ip_src));
+ strcpy(sec_ip_dst, inet_ntoa(spkt->ip->ip_dst));
+
+ trace_colo_compare_ip_info(ppkt->size, pri_ip_src,
+ pri_ip_dst, spkt->size,
+ sec_ip_src, sec_ip_dst);
+ }
+
+ return colo_packet_compare_common(ppkt, spkt, 0);
}
static int colo_old_packet_check_one(Packet *pkt, int64_t *check_time)
while (!g_queue_is_empty(&conn->primary_list) &&
!g_queue_is_empty(&conn->secondary_list)) {
- qemu_mutex_lock(&s->timer_check_lock);
pkt = g_queue_pop_tail(&conn->primary_list);
- qemu_mutex_unlock(&s->timer_check_lock);
switch (conn->ip_proto) {
case IPPROTO_TCP:
result = g_queue_find_custom(&conn->secondary_list,
* until next comparison.
*/
trace_colo_compare_main("packet different");
- qemu_mutex_lock(&s->timer_check_lock);
g_queue_push_tail(&conn->primary_list, pkt);
- qemu_mutex_unlock(&s->timer_check_lock);
/* TODO: colo_notify_checkpoint();*/
break;
}
}
}
+/*
+ * Check old packet regularly so it can watch for any packets
+ * that the secondary hasn't produced equivalents of.
+ */
+static gboolean check_old_packet_regular(void *opaque)
+{
+ CompareState *s = opaque;
+
+ /* if have old packet we will notify checkpoint */
+ colo_old_packet_check(s);
+
+ return TRUE;
+}
+
static void *colo_compare_thread(void *opaque)
{
- GMainContext *worker_context;
- GMainLoop *compare_loop;
CompareState *s = opaque;
+ GSource *timeout_source;
- worker_context = g_main_context_new();
+ s->worker_context = g_main_context_new();
qemu_chr_fe_set_handlers(&s->chr_pri_in, compare_chr_can_read,
- compare_pri_chr_in, NULL, s, worker_context, true);
+ compare_pri_chr_in, NULL, s, s->worker_context, true);
qemu_chr_fe_set_handlers(&s->chr_sec_in, compare_chr_can_read,
- compare_sec_chr_in, NULL, s, worker_context, true);
+ compare_sec_chr_in, NULL, s, s->worker_context, true);
+
+ s->compare_loop = g_main_loop_new(s->worker_context, FALSE);
- compare_loop = g_main_loop_new(worker_context, FALSE);
+ /* To kick any packets that the secondary doesn't match */
+ timeout_source = g_timeout_source_new(REGULAR_PACKET_CHECK_MS);
+ g_source_set_callback(timeout_source,
+ (GSourceFunc)check_old_packet_regular, s, NULL);
+ g_source_attach(timeout_source, s->worker_context);
- g_main_loop_run(compare_loop);
+ g_main_loop_run(s->compare_loop);
- g_main_loop_unref(compare_loop);
- g_main_context_unref(worker_context);
+ g_source_unref(timeout_source);
+ g_main_loop_unref(s->compare_loop);
+ g_main_context_unref(s->worker_context);
return NULL;
}
* Return 0 is success.
* Return 1 is failed.
*/
-static int find_and_check_chardev(CharDriverState **chr,
+static int find_and_check_chardev(Chardev **chr,
char *chr_name,
Error **errp)
{
- CompareChardevProps props;
-
*chr = qemu_chr_find(chr_name);
if (*chr == NULL) {
error_setg(errp, "Device '%s' not found",
return 1;
}
- memset(&props, 0, sizeof(props));
-
if (!qemu_chr_has_feature(*chr, QEMU_CHAR_FEATURE_RECONNECTABLE)) {
error_setg(errp, "chardev \"%s\" is not reconnectable",
chr_name);
return 0;
}
-/*
- * Check old packet regularly so it can watch for any packets
- * that the secondary hasn't produced equivalents of.
- */
-static void check_old_packet_regular(void *opaque)
-{
- CompareState *s = opaque;
-
- timer_mod(s->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
- REGULAR_PACKET_CHECK_MS);
- /* if have old packet we will notify checkpoint */
- /*
- * TODO: Make timer handler run in compare thread
- * like qemu_chr_add_handlers_full.
- */
- qemu_mutex_lock(&s->timer_check_lock);
- colo_old_packet_check(s);
- qemu_mutex_unlock(&s->timer_check_lock);
-}
-
/*
* Called from the main thread on the primary
* to setup colo-compare.
static void colo_compare_complete(UserCreatable *uc, Error **errp)
{
CompareState *s = COLO_COMPARE(uc);
- CharDriverState *chr;
+ Chardev *chr;
char thread_name[64];
static int compare_id;
net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize);
g_queue_init(&s->conn_list);
- qemu_mutex_init(&s->timer_check_lock);
s->connection_track_table = g_hash_table_new_full(connection_key_hash,
connection_key_equal,
QEMU_THREAD_JOINABLE);
compare_id++;
- /* A regular timer to kick any packets that the secondary doesn't match */
- s->timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, /* Only when guest runs */
- check_old_packet_regular, s);
- timer_mod(s->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
- REGULAR_PACKET_CHECK_MS);
-
return;
}
+static void colo_flush_packets(void *opaque, void *user_data)
+{
+ CompareState *s = user_data;
+ Connection *conn = opaque;
+ Packet *pkt = NULL;
+
+ while (!g_queue_is_empty(&conn->primary_list)) {
+ pkt = g_queue_pop_head(&conn->primary_list);
+ compare_chr_send(&s->chr_out, pkt->data, pkt->size);
+ packet_destroy(pkt, NULL);
+ }
+ while (!g_queue_is_empty(&conn->secondary_list)) {
+ pkt = g_queue_pop_head(&conn->secondary_list);
+ packet_destroy(pkt, NULL);
+ }
+}
+
static void colo_compare_class_init(ObjectClass *oc, void *data)
{
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
{
CompareState *s = COLO_COMPARE(obj);
- qemu_chr_fe_deinit(&s->chr_pri_in);
- qemu_chr_fe_deinit(&s->chr_sec_in);
+ qemu_chr_fe_set_handlers(&s->chr_pri_in, NULL, NULL, NULL, NULL,
+ s->worker_context, true);
+ qemu_chr_fe_set_handlers(&s->chr_sec_in, NULL, NULL, NULL, NULL,
+ s->worker_context, true);
qemu_chr_fe_deinit(&s->chr_out);
- g_queue_free(&s->conn_list);
+ g_main_loop_quit(s->compare_loop);
+ qemu_thread_join(&s->thread);
- if (qemu_thread_is_self(&s->thread)) {
- /* compare connection */
- g_queue_foreach(&s->conn_list, colo_compare_connection, s);
- qemu_thread_join(&s->thread);
- }
-
- if (s->timer) {
- timer_del(s->timer);
- }
+ /* Release all unhandled packets after compare thead exited */
+ g_queue_foreach(&s->conn_list, colo_flush_packets, s);
- qemu_mutex_destroy(&s->timer_check_lock);
+ g_queue_clear(&s->conn_list);
+ g_hash_table_destroy(s->connection_track_table);
g_free(s->pri_indev);
g_free(s->sec_indev);
g_free(s->outdev);
projects / mirror_qemu.git / blobdiff