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net/net.c: Add vnet_hdr support in SocketReadState

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We add a flag to decide whether net_fill_rstate() need read
the vnet_hdr_len or not.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Suggested-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Zhang Chen 2017-07-04 14:53:46 +08:00 committed by Jason Wang
parent d6b732e953
commit 3cde5ea211
5 changed files with 46 additions and 13 deletions
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9
include/net/net.h
View File

@ -112,9 +112,13 @@ typedef struct NICState {
} NICState;
struct SocketReadState {
int state; /* 0 = getting length, 1 = getting data */
/* 0 = getting length, 1 = getting vnet header length, 2 = getting data */
int state;
/* This flag decide whether to read the vnet_hdr_len field */
bool vnet_hdr;
uint32_t index;
uint32_t packet_len;
uint32_t vnet_hdr_len;
uint8_t buf[NET_BUFSIZE];
SocketReadStateFinalize *finalize;
};
@ -177,7 +181,8 @@ ssize_t qemu_deliver_packet_iov(NetClientState *sender,
void print_net_client(Monitor *mon, NetClientState *nc);
void hmp_info_network(Monitor *mon, const QDict *qdict);
void net_socket_rs_init(SocketReadState *rs,
SocketReadStateFinalize *finalize);
SocketReadStateFinalize *finalize,
bool vnet_hdr);
/* NIC info */

4
net/colo-compare.c
View File

@ -743,8 +743,8 @@ static void colo_compare_complete(UserCreatable *uc, Error **errp)
return;
}
net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize);
net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize);
net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize, false);
net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize, false);
g_queue_init(&s->conn_list);

2
net/filter-mirror.c
View File

@ -229,7 +229,7 @@ static void filter_redirector_setup(NetFilterState *nf, Error **errp)
}
}
net_socket_rs_init(&s->rs, redirector_rs_finalize);
net_socket_rs_init(&s->rs, redirector_rs_finalize, false);
if (s->indev) {
chr = qemu_chr_find(s->indev);

36
net/net.c
View File

@ -1616,11 +1616,14 @@ QemuOptsList qemu_net_opts = {
};
void net_socket_rs_init(SocketReadState *rs,
SocketReadStateFinalize *finalize)
SocketReadStateFinalize *finalize,
bool vnet_hdr)
{
rs->state = 0;
rs->vnet_hdr = vnet_hdr;
rs->index = 0;
rs->packet_len = 0;
rs->vnet_hdr_len = 0;
memset(rs->buf, 0, sizeof(rs->buf));
rs->finalize = finalize;
}
@ -1635,8 +1638,12 @@ int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size)
unsigned int l;
while (size > 0) {
/* reassemble a packet from the network */
switch (rs->state) { /* 0 = getting length, 1 = getting data */
/* Reassemble a packet from the network.
* 0 = getting length.
* 1 = getting vnet header length.
* 2 = getting data.
*/
switch (rs->state) {
case 0:
l = 4 - rs->index;
if (l > size) {
@ -1650,10 +1657,31 @@ int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size)
/* got length */
rs->packet_len = ntohl(*(uint32_t *)rs->buf);
rs->index = 0;
rs->state = 1;
if (rs->vnet_hdr) {
rs->state = 1;
} else {
rs->state = 2;
rs->vnet_hdr_len = 0;
}
}
break;
case 1:
l = 4 - rs->index;
if (l > size) {
l = size;
}
memcpy(rs->buf + rs->index, buf, l);
buf += l;
size -= l;
rs->index += l;
if (rs->index == 4) {
/* got vnet header length */
rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf);
rs->index = 0;
rs->state = 2;
}
break;
case 2:
l = rs->packet_len - rs->index;
if (l > size) {
l = size;

8
net/socket.c
View File

@ -174,7 +174,7 @@ static void net_socket_send(void *opaque)
closesocket(s->fd);
s->fd = -1;
net_socket_rs_init(&s->rs, net_socket_rs_finalize);
net_socket_rs_init(&s->rs, net_socket_rs_finalize, false);
s->nc.link_down = true;
memset(s->nc.info_str, 0, sizeof(s->nc.info_str));
@ -366,7 +366,7 @@ static NetSocketState *net_socket_fd_init_dgram(NetClientState *peer,
s->fd = fd;
s->listen_fd = -1;
s->send_fn = net_socket_send_dgram;
net_socket_rs_init(&s->rs, net_socket_rs_finalize);
net_socket_rs_init(&s->rs, net_socket_rs_finalize, false);
net_socket_read_poll(s, true);
/* mcast: save bound address as dst */
@ -417,7 +417,7 @@ static NetSocketState *net_socket_fd_init_stream(NetClientState *peer,
s->fd = fd;
s->listen_fd = -1;
net_socket_rs_init(&s->rs, net_socket_rs_finalize);
net_socket_rs_init(&s->rs, net_socket_rs_finalize, false);
/* Disable Nagle algorithm on TCP sockets to reduce latency */
socket_set_nodelay(fd);
@ -522,7 +522,7 @@ static int net_socket_listen_init(NetClientState *peer,
s->fd = -1;
s->listen_fd = fd;
s->nc.link_down = true;
net_socket_rs_init(&s->rs, net_socket_rs_finalize);
net_socket_rs_init(&s->rs, net_socket_rs_finalize, false);
qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s);
return 0;