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qemu-patch-raspberry4
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colo-compare: sort TCP packet queue by sequence number 

Improve efficiency of TCP packet comparison.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
stable-2.9
Zhang Chen 2017-01-24 16:53:46 +08:00 committed by Jason Wang
parent e514fc7e12
commit a935cc3132
1 changed files with 19 additions and 0 deletions
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19
net/colo-compare.c
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@ -101,6 +101,15 @@ static int compare_chr_send(CharBackend *out,
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
@ -137,6 +146,11 @@ static int packet_enqueue(CompareState *s, int mode)
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");
@ -145,6 +159,11 @@ static int packet_enqueue(CompareState *s, int mode)
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");