From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

This patch change the filter_send() parameter from CharBackend to MirrorState,

we can get more information like vnet_hdr(We use it to support packet with vnet_header).

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Signed-off-by: Jason Wang <jasowang@redhat.com>

---

net/filter-mirror.c | 10 +++++-----

1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/net/filter-mirror.c b/net/filter-mirror.c

index XXXXXXX..XXXXXXX 100644

--- a/net/filter-mirror.c

+++ b/net/filter-mirror.c

@@ -XXX,XX +XXX,XX @@ typedef struct MirrorState {

SocketReadState rs;

} MirrorState;

-static int filter_send(CharBackend *chr_out,

+static int filter_send(MirrorState *s,

const struct iovec *iov,

int iovcnt)

{

@@ -XXX,XX +XXX,XX @@ static int filter_send(CharBackend *chr_out,

}

len = htonl(size);

- ret = qemu_chr_fe_write_all(chr_out, (uint8_t *)&len, sizeof(len));

+ ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len));

if (ret != sizeof(len)) {

goto err;

}

buf = g_malloc(size);

iov_to_buf(iov, iovcnt, 0, buf, size);

- ret = qemu_chr_fe_write_all(chr_out, (uint8_t *)buf, size);

+ ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)buf, size);

g_free(buf);

if (ret != size) {

goto err;

@@ -XXX,XX +XXX,XX @@ static ssize_t filter_mirror_receive_iov(NetFilterState *nf,

MirrorState *s = FILTER_MIRROR(nf);

int ret;

- ret = filter_send(&s->chr_out, iov, iovcnt);

+ ret = filter_send(s, iov, iovcnt);

if (ret) {

error_report("filter mirror send failed(%s)", strerror(-ret));

}

@@ -XXX,XX +XXX,XX @@ static ssize_t filter_redirector_receive_iov(NetFilterState *nf,

int ret;

if (qemu_chr_fe_backend_connected(&s->chr_out)) {

- ret = filter_send(&s->chr_out, iov, iovcnt);

+ ret = filter_send(s, iov, iovcnt);

if (ret) {

error_report("filter redirector send failed(%s)", strerror(-ret));

}

--

2.7.4

From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

We add the vnet_hdr_support option for filter-mirror, default is disabled.

If you use virtio-net-pci or other driver needs vnet_hdr, please enable it.

You can use it for example:

-object filter-mirror,id=m0,netdev=hn0,queue=tx,outdev=mirror0,vnet_hdr_support

If it has vnet_hdr_support flag, we will change the sending packet format from

struct {int size; const uint8_t buf[];} to {int size; int vnet_hdr_len; const uint8_t buf[];}.

make other module(like colo-compare) know how to parse net packet correctly.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Signed-off-by: Jason Wang <jasowang@redhat.com>

---

net/filter-mirror.c | 42 +++++++++++++++++++++++++++++++++++++++++-

qemu-options.hx | 5 ++---

2 files changed, 43 insertions(+), 4 deletions(-)

diff --git a/net/filter-mirror.c b/net/filter-mirror.c

index XXXXXXX..XXXXXXX 100644

--- a/net/filter-mirror.c

+++ b/net/filter-mirror.c

@@ -XXX,XX +XXX,XX @@ typedef struct MirrorState {

CharBackend chr_in;

CharBackend chr_out;

SocketReadState rs;

+ bool vnet_hdr;

} MirrorState;

static int filter_send(MirrorState *s,

const struct iovec *iov,

int iovcnt)

{

+ NetFilterState *nf = NETFILTER(s);

int ret = 0;

ssize_t size = 0;

uint32_t len = 0;

@@ -XXX,XX +XXX,XX @@ static int filter_send(MirrorState *s,

goto err;

}

+ if (s->vnet_hdr) {

+ /*

+ * If vnet_hdr = on, we send vnet header len to make other

+ * module(like colo-compare) know how to parse net

+ * packet correctly.

+ */

+ ssize_t vnet_hdr_len;

+

+ vnet_hdr_len = nf->netdev->vnet_hdr_len;

+

+ len = htonl(vnet_hdr_len);

+ ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len));

+ if (ret != sizeof(len)) {

+ goto err;

+ }

+ }

+

buf = g_malloc(size);

iov_to_buf(iov, iovcnt, 0, buf, size);

ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)buf, size);

@@ -XXX,XX +XXX,XX @@ static void filter_redirector_setup(NetFilterState *nf, Error **errp)

}

}

- net_socket_rs_init(&s->rs, redirector_rs_finalize, false);

+ net_socket_rs_init(&s->rs, redirector_rs_finalize, s->vnet_hdr);

if (s->indev) {

chr = qemu_chr_find(s->indev);

@@ -XXX,XX +XXX,XX @@ static void filter_mirror_set_outdev(Object *obj,

}

}

+static bool filter_mirror_get_vnet_hdr(Object *obj, Error **errp)

+{

+ MirrorState *s = FILTER_MIRROR(obj);

+

+ return s->vnet_hdr;

+}

+

+static void filter_mirror_set_vnet_hdr(Object *obj, bool value, Error **errp)

+{

+ MirrorState *s = FILTER_MIRROR(obj);

+

+ s->vnet_hdr = value;

+}

+

static char *filter_redirector_get_outdev(Object *obj, Error **errp)

{

MirrorState *s = FILTER_REDIRECTOR(obj);

@@ -XXX,XX +XXX,XX @@ static void filter_redirector_set_outdev(Object *obj,

static void filter_mirror_init(Object *obj)

{

+ MirrorState *s = FILTER_MIRROR(obj);

+

object_property_add_str(obj, "outdev", filter_mirror_get_outdev,

filter_mirror_set_outdev, NULL);

+

+ s->vnet_hdr = false;

+ object_property_add_bool(obj, "vnet_hdr_support",

+ filter_mirror_get_vnet_hdr,

+ filter_mirror_set_vnet_hdr, NULL);

}

static void filter_redirector_init(Object *obj)

diff --git a/qemu-options.hx b/qemu-options.hx

index XXXXXXX..XXXXXXX 100644

--- a/qemu-options.hx

+++ b/qemu-options.hx

@@ -XXX,XX +XXX,XX @@ queue @var{all|rx|tx} is an option that can be applied to any netfilter.

@option{tx}: the filter is attached to the transmit queue of the netdev,

where it will receive packets sent by the netdev.

-@item -object filter-mirror,id=@var{id},netdev=@var{netdevid},outdev=@var{chardevid}[,queue=@var{all|rx|tx}]

+@item -object filter-mirror,id=@var{id},netdev=@var{netdevid},outdev=@var{chardevid},queue=@var{all|rx|tx}[,vnet_hdr_support]

-filter-mirror on netdev @var{netdevid},mirror net packet to chardev

-@var{chardevid}

+filter-mirror on netdev @var{netdevid},mirror net packet to chardev@var{chardevid}, if it has the vnet_hdr_support flag, filter-mirror will mirror packet with vnet_hdr_len.

@item -object filter-redirector,id=@var{id},netdev=@var{netdevid},indev=@var{chardevid},

outdev=@var{chardevid}[,queue=@var{all|rx|tx}]

--

2.7.4

From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

We add the vnet_hdr_support option for filter-redirector, default is disabled.

If you use virtio-net-pci net driver or other driver needs vnet_hdr, please enable it.

Because colo-compare or other modules needs the vnet_hdr_len to parse

packet, we add this new option send the len to others.

You can use it for example:

-object filter-redirector,id=r0,netdev=hn0,queue=tx,outdev=red0,vnet_hdr_support

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Signed-off-by: Jason Wang <jasowang@redhat.com>

---

net/filter-mirror.c | 23 +++++++++++++++++++++++

qemu-options.hx | 6 +++---

2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/net/filter-mirror.c b/net/filter-mirror.c

index XXXXXXX..XXXXXXX 100644

--- a/net/filter-mirror.c

+++ b/net/filter-mirror.c

@@ -XXX,XX +XXX,XX @@ static void filter_redirector_set_outdev(Object *obj,

s->outdev = g_strdup(value);

}

+static bool filter_redirector_get_vnet_hdr(Object *obj, Error **errp)

+{

+ MirrorState *s = FILTER_REDIRECTOR(obj);

+

+ return s->vnet_hdr;

+}

+

+static void filter_redirector_set_vnet_hdr(Object *obj,

+ bool value,

+ Error **errp)

+{

+ MirrorState *s = FILTER_REDIRECTOR(obj);

+

+ s->vnet_hdr = value;

+}

+

static void filter_mirror_init(Object *obj)

{

MirrorState *s = FILTER_MIRROR(obj);

@@ -XXX,XX +XXX,XX @@ static void filter_mirror_init(Object *obj)

static void filter_redirector_init(Object *obj)

{

+ MirrorState *s = FILTER_REDIRECTOR(obj);

+

object_property_add_str(obj, "indev", filter_redirector_get_indev,

filter_redirector_set_indev, NULL);

object_property_add_str(obj, "outdev", filter_redirector_get_outdev,

filter_redirector_set_outdev, NULL);

+

+ s->vnet_hdr = false;

+ object_property_add_bool(obj, "vnet_hdr_support",

+ filter_redirector_get_vnet_hdr,

+ filter_redirector_set_vnet_hdr, NULL);

}

static void filter_mirror_fini(Object *obj)

diff --git a/qemu-options.hx b/qemu-options.hx

index XXXXXXX..XXXXXXX 100644

--- a/qemu-options.hx

+++ b/qemu-options.hx

@@ -XXX,XX +XXX,XX @@ queue @var{all|rx|tx} is an option that can be applied to any netfilter.

filter-mirror on netdev @var{netdevid},mirror net packet to chardev@var{chardevid}, if it has the vnet_hdr_support flag, filter-mirror will mirror packet with vnet_hdr_len.

-@item -object filter-redirector,id=@var{id},netdev=@var{netdevid},indev=@var{chardevid},

-outdev=@var{chardevid}[,queue=@var{all|rx|tx}]

+@item -object filter-redirector,id=@var{id},netdev=@var{netdevid},indev=@var{chardevid},outdev=@var{chardevid},queue=@var{all|rx|tx}[,vnet_hdr_support]

filter-redirector on netdev @var{netdevid},redirect filter's net packet to chardev

-@var{chardevid},and redirect indev's packet to filter.

+@var{chardevid},and redirect indev's packet to filter.if it has the vnet_hdr_support flag,

+filter-redirector will redirect packet with vnet_hdr_len.

Create a filter-redirector we need to differ outdev id from indev id, id can not

be the same. we can just use indev or outdev, but at least one of indev or outdev

need to be specified.

--

2.7.4

From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

We can use this property flush and send packet with vnet_hdr_len.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Signed-off-by: Jason Wang <jasowang@redhat.com>

---

net/colo-compare.c | 8 ++++++--

net/colo.c | 3 ++-

net/colo.h | 4 +++-

net/filter-rewriter.c | 2 +-

4 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/net/colo-compare.c b/net/colo-compare.c

index XXXXXXX..XXXXXXX 100644

--- a/net/colo-compare.c

+++ b/net/colo-compare.c

@@ -XXX,XX +XXX,XX @@ static int packet_enqueue(CompareState *s, int mode)

Connection *conn;

if (mode == PRIMARY_IN) {

- pkt = packet_new(s->pri_rs.buf, s->pri_rs.packet_len);

+ pkt = packet_new(s->pri_rs.buf,

+ s->pri_rs.packet_len,

+ s->pri_rs.vnet_hdr_len);

} else {

- pkt = packet_new(s->sec_rs.buf, s->sec_rs.packet_len);

+ pkt = packet_new(s->sec_rs.buf,

+ s->sec_rs.packet_len,

+ s->sec_rs.vnet_hdr_len);

}

if (parse_packet_early(pkt)) {

diff --git a/net/colo.c b/net/colo.c

index XXXXXXX..XXXXXXX 100644

--- a/net/colo.c

+++ b/net/colo.c

@@ -XXX,XX +XXX,XX @@ void connection_destroy(void *opaque)

g_slice_free(Connection, conn);

}

-Packet *packet_new(const void *data, int size)

+Packet *packet_new(const void *data, int size, int vnet_hdr_len)

{

Packet *pkt = g_slice_new(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;

return pkt;

}

diff --git a/net/colo.h b/net/colo.h

index XXXXXXX..XXXXXXX 100644

--- a/net/colo.h

+++ b/net/colo.h

@@ -XXX,XX +XXX,XX @@ typedef struct Packet {

int size;

/* Time of packet creation, in wall clock ms */

int64_t creation_ms;

+ /* Get vnet_hdr_len from filter */

+ uint32_t vnet_hdr_len;

} Packet;

typedef struct ConnectionKey {

@@ -XXX,XX +XXX,XX @@ Connection *connection_get(GHashTable *connection_track_table,

ConnectionKey *key,

GQueue *conn_list);

void connection_hashtable_reset(GHashTable *connection_track_table);

-Packet *packet_new(const void *data, int size);

+Packet *packet_new(const void *data, int size, int vnet_hdr_len);

void packet_destroy(void *opaque, void *user_data);

#endif /* QEMU_COLO_PROXY_H */

diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c

index XXXXXXX..XXXXXXX 100644

--- a/net/filter-rewriter.c

+++ b/net/filter-rewriter.c

@@ -XXX,XX +XXX,XX @@ static ssize_t colo_rewriter_receive_iov(NetFilterState *nf,

char *buf = g_malloc0(size);

iov_to_buf(iov, iovcnt, 0, buf, size);

- pkt = packet_new(buf, size);

+ pkt = packet_new(buf, size, 0);

g_free(buf);

/*

--

2.7.4

From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

We add the vnet_hdr_support option for colo-compare, default is disabled.

If you use virtio-net-pci or other driver needs vnet_hdr, please enable it.

You can use it for example:

-object colo-compare,id=comp0,primary_in=compare0-0,secondary_in=compare1,outdev=compare_out0,vnet_hdr_support

COLO-compare can get vnet header length from filter,

Add vnet_hdr_len to struct packet and output packet with

the vnet_hdr_len.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Signed-off-by: Jason Wang <jasowang@redhat.com>

---

net/colo-compare.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++-------

qemu-options.hx | 4 ++--

2 files changed, 55 insertions(+), 9 deletions(-)

diff --git a/net/colo-compare.c b/net/colo-compare.c

index XXXXXXX..XXXXXXX 100644

--- a/net/colo-compare.c

+++ b/net/colo-compare.c

@@ -XXX,XX +XXX,XX @@ typedef struct CompareState {

CharBackend chr_out;

SocketReadState pri_rs;

SocketReadState sec_rs;

+ bool vnet_hdr;

/* connection list: the connections belonged to this NIC could be found

* in this list.

@@ -XXX,XX +XXX,XX @@ enum {

static int compare_chr_send(CompareState *s,

const uint8_t *buf,

- uint32_t size);

+ uint32_t size,

+ uint32_t vnet_hdr_len);

static gint seq_sorter(Packet *a, Packet *b, gpointer data)

{

@@ -XXX,XX +XXX,XX @@ static void colo_compare_connection(void *opaque, void *user_data)

}

if (result) {

- ret = compare_chr_send(s, pkt->data, pkt->size);

+ ret = compare_chr_send(s,

+ pkt->data,

+ pkt->size,

+ pkt->vnet_hdr_len);

if (ret < 0) {

error_report("colo_send_primary_packet failed");

}

@@ -XXX,XX +XXX,XX @@ static void colo_compare_connection(void *opaque, void *user_data)

static int compare_chr_send(CompareState *s,

const uint8_t *buf,

- uint32_t size)

+ uint32_t size,

+ uint32_t vnet_hdr_len)

{

int ret = 0;

uint32_t len = htonl(size);

@@ -XXX,XX +XXX,XX @@ static int compare_chr_send(CompareState *s,

goto err;

}

+ if (s->vnet_hdr) {

+ /*

+ * We send vnet header len make other module(like filter-redirector)

+ * know how to parse net packet correctly.

+ */

+ len = htonl(vnet_hdr_len);

+ ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len));

+ if (ret != sizeof(len)) {

+ goto err;

+ }

+ }

+

ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)buf, size);

if (ret != size) {

goto err;

@@ -XXX,XX +XXX,XX @@ static void compare_set_outdev(Object *obj, const char *value, Error **errp)

s->outdev = g_strdup(value);

}

+static bool compare_get_vnet_hdr(Object *obj, Error **errp)

+{

+ CompareState *s = COLO_COMPARE(obj);

+

+ return s->vnet_hdr;

+}

+

+static void compare_set_vnet_hdr(Object *obj,

+ bool value,

+ Error **errp)

+{

+ CompareState *s = COLO_COMPARE(obj);

+

+ s->vnet_hdr = value;

+}

+

static void compare_pri_rs_finalize(SocketReadState *pri_rs)

{

CompareState *s = container_of(pri_rs, CompareState, pri_rs);

if (packet_enqueue(s, PRIMARY_IN)) {

trace_colo_compare_main("primary: unsupported packet in");

- compare_chr_send(s, pri_rs->buf, pri_rs->packet_len);

+ compare_chr_send(s,

+ pri_rs->buf,

+ pri_rs->packet_len,

+ pri_rs->vnet_hdr_len);

} else {

/* compare connection */

g_queue_foreach(&s->conn_list, colo_compare_connection, s);

@@ -XXX,XX +XXX,XX @@ static void colo_compare_complete(UserCreatable *uc, Error **errp)

return;

}

- net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize, false);

- net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize, false);

+ net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize, s->vnet_hdr);

+ net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize, s->vnet_hdr);

g_queue_init(&s->conn_list);

@@ -XXX,XX +XXX,XX @@ static void colo_flush_packets(void *opaque, void *user_data)

while (!g_queue_is_empty(&conn->primary_list)) {

pkt = g_queue_pop_head(&conn->primary_list);

- compare_chr_send(s, pkt->data, pkt->size);

+ compare_chr_send(s,

+ pkt->data,

+ pkt->size,

+ pkt->vnet_hdr_len);

packet_destroy(pkt, NULL);

}

while (!g_queue_is_empty(&conn->secondary_list)) {

@@ -XXX,XX +XXX,XX @@ static void colo_compare_class_init(ObjectClass *oc, void *data)

static void colo_compare_init(Object *obj)

{

+ CompareState *s = COLO_COMPARE(obj);

+

object_property_add_str(obj, "primary_in",

compare_get_pri_indev, compare_set_pri_indev,

NULL);

@@ -XXX,XX +XXX,XX @@ static void colo_compare_init(Object *obj)

object_property_add_str(obj, "outdev",

compare_get_outdev, compare_set_outdev,

NULL);

+

+ s->vnet_hdr = false;

+ object_property_add_bool(obj, "vnet_hdr_support", compare_get_vnet_hdr,

+ compare_set_vnet_hdr, NULL);

}

static void colo_compare_finalize(Object *obj)

diff --git a/qemu-options.hx b/qemu-options.hx

index XXXXXXX..XXXXXXX 100644

--- a/qemu-options.hx

+++ b/qemu-options.hx

@@ -XXX,XX +XXX,XX @@ Dump the network traffic on netdev @var{dev} to the file specified by

The file format is libpcap, so it can be analyzed with tools such as tcpdump

or Wireshark.

-@item -object colo-compare,id=@var{id},primary_in=@var{chardevid},secondary_in=@var{chardevid},

-outdev=@var{chardevid}

+@item -object colo-compare,id=@var{id},primary_in=@var{chardevid},secondary_in=@var{chardevid},outdev=@var{chardevid}[,vnet_hdr_support]

Colo-compare gets packet from primary_in@var{chardevid} and secondary_in@var{chardevid}, than compare primary packet with

secondary packet. If the packets are same, we will output primary

packet to outdev@var{chardevid}, else we will notify colo-frame

do checkpoint and send primary packet to outdev@var{chardevid}.

+if it has the vnet_hdr_support flag, colo compare will send/recv packet with vnet_hdr_len.

we must use it with the help of filter-mirror and filter-redirector.

--

2.7.4

From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Make colo-compare and filter-rewriter can parse vnet packet.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Signed-off-by: Jason Wang <jasowang@redhat.com>

---

net/colo.c | 6 +++---

1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/colo.c b/net/colo.c

index XXXXXXX..XXXXXXX 100644

--- a/net/colo.c

+++ b/net/colo.c

@@ -XXX,XX +XXX,XX @@ int parse_packet_early(Packet *pkt)

{

int network_length;

static const uint8_t vlan[] = {0x81, 0x00};

- uint8_t *data = pkt->data;

+ uint8_t *data = pkt->data + pkt->vnet_hdr_len;

uint16_t l3_proto;

ssize_t l2hdr_len = eth_get_l2_hdr_length(data);

- if (pkt->size < ETH_HLEN) {

+ if (pkt->size < ETH_HLEN + pkt->vnet_hdr_len) {

trace_colo_proxy_main("pkt->size < ETH_HLEN");

return 1;

}

@@ -XXX,XX +XXX,XX @@ int parse_packet_early(Packet *pkt)

}

network_length = pkt->ip->ip_hl * 4;

- if (pkt->size < l2hdr_len + network_length) {

+ if (pkt->size < l2hdr_len + network_length + pkt->vnet_hdr_len) {

trace_colo_proxy_main("pkt->size < network_header + network_length");

return 1;

}

--

2.7.4

From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

COLO-Proxy just focus on packet payload, so we skip vnet header.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Signed-off-by: Jason Wang <jasowang@redhat.com>

---

net/colo-compare.c | 8 ++++++--

1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/net/colo-compare.c b/net/colo-compare.c

index XXXXXXX..XXXXXXX 100644

--- a/net/colo-compare.c

+++ b/net/colo-compare.c

@@ -XXX,XX +XXX,XX @@ static int colo_packet_compare_common(Packet *ppkt, Packet *spkt, int offset)

sec_ip_src, sec_ip_dst);

}

+ offset = ppkt->vnet_hdr_len + offset;

+

if (ppkt->size == spkt->size) {

- return memcmp(ppkt->data + offset, spkt->data + offset,

+ return memcmp(ppkt->data + offset,

+ spkt->data + offset,

spkt->size - offset);

} else {

trace_colo_compare_main("Net packet size are not the same");

@@ -XXX,XX +XXX,XX @@ static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt)

*/

if (ptcp->th_off > 5) {

ptrdiff_t tcp_offset;

+

tcp_offset = ppkt->transport_header - (uint8_t *)ppkt->data

- + (ptcp->th_off * 4);

+ + (ptcp->th_off * 4) - ppkt->vnet_hdr_len;

res = colo_packet_compare_common(ppkt, spkt, tcp_offset);

} else if (ptcp->th_sum == stcp->th_sum) {

res = colo_packet_compare_common(ppkt, spkt, ETH_HLEN);

--

2.7.4

From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

We add the vnet_hdr_support option for filter-rewriter, default is disabled.

If you use virtio-net-pci or other driver needs vnet_hdr, please enable it.

You can use it for example:

-object filter-rewriter,id=rew0,netdev=hn0,queue=all,vnet_hdr_support

We get the vnet_hdr_len from NetClientState that make us

parse net packet correctly.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Signed-off-by: Jason Wang <jasowang@redhat.com>

---

net/filter-rewriter.c | 37 ++++++++++++++++++++++++++++++++++++-

qemu-options.hx | 4 ++--

2 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c

index XXXXXXX..XXXXXXX 100644

--- a/net/filter-rewriter.c

+++ b/net/filter-rewriter.c

@@ -XXX,XX +XXX,XX @@

#include "qemu-common.h"

#include "qapi/error.h"

#include "qapi/qmp/qerror.h"

+#include "qemu/error-report.h"

#include "qapi-visit.h"

#include "qom/object.h"

#include "qemu/main-loop.h"

@@ -XXX,XX +XXX,XX @@ typedef struct RewriterState {

NetQueue *incoming_queue;

/* hashtable to save connection */

GHashTable *connection_track_table;

+ bool vnet_hdr;

} RewriterState;

static void filter_rewriter_flush(NetFilterState *nf)

@@ -XXX,XX +XXX,XX @@ static ssize_t colo_rewriter_receive_iov(NetFilterState *nf,

ConnectionKey key;

Packet *pkt;

ssize_t size = iov_size(iov, iovcnt);

+ ssize_t vnet_hdr_len = 0;

char *buf = g_malloc0(size);

iov_to_buf(iov, iovcnt, 0, buf, size);

- pkt = packet_new(buf, size, 0);

+

+ if (s->vnet_hdr) {

+ vnet_hdr_len = nf->netdev->vnet_hdr_len;

+ }

+

+ pkt = packet_new(buf, size, vnet_hdr_len);

g_free(buf);

/*

@@ -XXX,XX +XXX,XX @@ static void colo_rewriter_setup(NetFilterState *nf, Error **errp)

s->incoming_queue = qemu_new_net_queue(qemu_netfilter_pass_to_next, nf);

}

+static bool filter_rewriter_get_vnet_hdr(Object *obj, Error **errp)

+{

+ RewriterState *s = FILTER_COLO_REWRITER(obj);

+

+ return s->vnet_hdr;

+}

+

+static void filter_rewriter_set_vnet_hdr(Object *obj,

+ bool value,

+ Error **errp)

+{

+ RewriterState *s = FILTER_COLO_REWRITER(obj);

+

+ s->vnet_hdr = value;

+}

+

+static void filter_rewriter_init(Object *obj)

+{

+ RewriterState *s = FILTER_COLO_REWRITER(obj);

+

+ s->vnet_hdr = false;

+ object_property_add_bool(obj, "vnet_hdr_support",

+ filter_rewriter_get_vnet_hdr,

+ filter_rewriter_set_vnet_hdr, NULL);

+}

+

static void colo_rewriter_class_init(ObjectClass *oc, void *data)

{

NetFilterClass *nfc = NETFILTER_CLASS(oc);

@@ -XXX,XX +XXX,XX @@ static const TypeInfo colo_rewriter_info = {

.name = TYPE_FILTER_REWRITER,

.parent = TYPE_NETFILTER,

.class_init = colo_rewriter_class_init,

+ .instance_init = filter_rewriter_init,

.instance_size = sizeof(RewriterState),

};

diff --git a/qemu-options.hx b/qemu-options.hx

index XXXXXXX..XXXXXXX 100644

--- a/qemu-options.hx

+++ b/qemu-options.hx

@@ -XXX,XX +XXX,XX @@ Create a filter-redirector we need to differ outdev id from indev id, id can not

be the same. we can just use indev or outdev, but at least one of indev or outdev

need to be specified.

-@item -object filter-rewriter,id=@var{id},netdev=@var{netdevid}[,queue=@var{all|rx|tx}]

+@item -object filter-rewriter,id=@var{id},netdev=@var{netdevid},queue=@var{all|rx|tx},[vnet_hdr_support]

Filter-rewriter is a part of COLO project.It will rewrite tcp packet to

secondary from primary to keep secondary tcp connection,and rewrite

tcp packet to primary from secondary make tcp packet can be handled by

-client.

+client.if it has the vnet_hdr_support flag, we can parse packet with vnet header.

usage:

colo secondary:

--

2.7.4

From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>

Signed-off-by: Jason Wang <jasowang@redhat.com>

---

docs/colo-proxy.txt | 26 ++++++++++++++++++++++++++

1 file changed, 26 insertions(+)

diff --git a/docs/colo-proxy.txt b/docs/colo-proxy.txt

index XXXXXXX..XXXXXXX 100644

--- a/docs/colo-proxy.txt

+++ b/docs/colo-proxy.txt

@@ -XXX,XX +XXX,XX @@ Secondary(ip:3.3.3.8):

-chardev socket,id=red1,host=3.3.3.3,port=9004

-object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0

-object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1

+-object filter-rewriter,id=f3,netdev=hn0,queue=all

+

+If you want to use virtio-net-pci or other driver with vnet_header:

+

+Primary(ip:3.3.3.3):

+-netdev tap,id=hn0,vhost=off,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown

+-device e1000,id=e0,netdev=hn0,mac=52:a4:00:12:78:66

+-chardev socket,id=mirror0,host=3.3.3.3,port=9003,server,nowait

+-chardev socket,id=compare1,host=3.3.3.3,port=9004,server,nowait

+-chardev socket,id=compare0,host=3.3.3.3,port=9001,server,nowait

+-chardev socket,id=compare0-0,host=3.3.3.3,port=9001

+-chardev socket,id=compare_out,host=3.3.3.3,port=9005,server,nowait

+-chardev socket,id=compare_out0,host=3.3.3.3,port=9005

+-object filter-mirror,id=m0,netdev=hn0,queue=tx,outdev=mirror0,vnet_hdr_support

+-object filter-redirector,netdev=hn0,id=redire0,queue=rx,indev=compare_out,vnet_hdr_support

+-object filter-redirector,netdev=hn0,id=redire1,queue=rx,outdev=compare0,vnet_hdr_support

+-object colo-compare,id=comp0,primary_in=compare0-0,secondary_in=compare1,outdev=compare_out0,vnet_hdr_support

+

+Secondary(ip:3.3.3.8):

+-netdev tap,id=hn0,vhost=off,script=/etc/qemu-ifup,down script=/etc/qemu-ifdown

+-device e1000,netdev=hn0,mac=52:a4:00:12:78:66

+-chardev socket,id=red0,host=3.3.3.3,port=9003

+-chardev socket,id=red1,host=3.3.3.3,port=9004

+-object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0,vnet_hdr_support

+-object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1,vnet_hdr_support

+-object filter-rewriter,id=f3,netdev=hn0,queue=all,vnet_hdr_support

Note:

a.COLO-proxy must work with COLO-frame and Block-replication.

--

2.7.4