From 9b492719dd0445c676da6805c84f9a5893583d1c Mon Sep 17 00:00:00 2001 From: "Rao, Lei" Date: Tue, 8 Jun 2021 16:23:29 +0800 Subject: Add a function named packet_new_nocopy for COLO. Use the packet_new_nocopy instead of packet_new in the filter-rewriter module. There will be one less memory copy in the processing of each network packet. Signed-off-by: Lei Rao Signed-off-by: Zhang Chen Reviewed-by: Zhang Chen Signed-off-by: Jason Wang --- net/colo.c | 25 +++++++++++++++++-------- net/colo.h | 1 + net/filter-rewriter.c | 3 +-- 3 files changed, 19 insertions(+), 10 deletions(-) diff --git a/net/colo.c b/net/colo.c index ef00609848..3a3e6e89a0 100644 --- a/net/colo.c +++ b/net/colo.c @@ -157,19 +157,28 @@ void connection_destroy(void *opaque) Packet *packet_new(const void *data, int size, int vnet_hdr_len) { - Packet *pkt = g_slice_new(Packet); + Packet *pkt = g_slice_new0(Packet); pkt->data = g_memdup(data, size); pkt->size = size; pkt->creation_ms = qemu_clock_get_ms(QEMU_CLOCK_HOST); pkt->vnet_hdr_len = vnet_hdr_len; - pkt->tcp_seq = 0; - pkt->tcp_ack = 0; - pkt->seq_end = 0; - pkt->header_size = 0; - pkt->payload_size = 0; - pkt->offset = 0; - pkt->flags = 0; + + return pkt; +} + +/* + * packet_new_nocopy will not copy data, so the caller can't release + * the data. And it will be released in packet_destroy. + */ +Packet *packet_new_nocopy(void *data, int size, int vnet_hdr_len) +{ + Packet *pkt = g_slice_new0(Packet); + + pkt->data = data; + pkt->size = size; + pkt->creation_ms = qemu_clock_get_ms(QEMU_CLOCK_HOST); + pkt->vnet_hdr_len = vnet_hdr_len; return pkt; } diff --git a/net/colo.h b/net/colo.h index 573ab91785..d91cd245c4 100644 --- a/net/colo.h +++ b/net/colo.h @@ -101,6 +101,7 @@ bool connection_has_tracked(GHashTable *connection_track_table, ConnectionKey *key); void connection_hashtable_reset(GHashTable *connection_track_table); Packet *packet_new(const void *data, int size, int vnet_hdr_len); +Packet *packet_new_nocopy(void *data, int size, int vnet_hdr_len); void packet_destroy(void *opaque, void *user_data); void packet_destroy_partial(void *opaque, void *user_data); diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c index 10fe3939b1..cb3a96cde1 100644 --- a/net/filter-rewriter.c +++ b/net/filter-rewriter.c @@ -270,8 +270,7 @@ static ssize_t colo_rewriter_receive_iov(NetFilterState *nf, vnet_hdr_len = nf->netdev->vnet_hdr_len; } - pkt = packet_new(buf, size, vnet_hdr_len); - g_free(buf); + pkt = packet_new_nocopy(buf, size, vnet_hdr_len); /* * if we get tcp packet -- cgit v1.2.3