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virtio-net: Add new RX filter controls 

Add a few new RX modes to better control the receive_filter.  These
are all fairly obvious features that hardware could provide.

Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
This commit is contained in:
Alex Williamson 2009-06-05 14:47:18 -06:00 committed by Mark McLoughlin
parent 2d9aba3961
commit 015cb16699
2 changed files with 46 additions and 8 deletions
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40
hw/virtio-net.c
View File

@ -16,7 +16,7 @@
#include "qemu-timer.h"
#include "virtio-net.h"
#define VIRTIO_NET_VM_VERSION 9
#define VIRTIO_NET_VM_VERSION 10
#define MAC_TABLE_ENTRIES 32
#define MAX_VLAN (1 << 12) /* Per 802.1Q definition */
@ -35,6 +35,10 @@ typedef struct VirtIONet
int mergeable_rx_bufs;
uint8_t promisc;
uint8_t allmulti;
uint8_t alluni;
uint8_t nomulti;
uint8_t nouni;
uint8_t nobcast;
struct {
int in_use;
int first_multi;
@ -98,6 +102,10 @@ static void virtio_net_reset(VirtIODevice *vdev)
/* Reset back to compatibility mode */
n->promisc = 1;
n->allmulti = 0;
n->alluni = 0;
n->nomulti = 0;
n->nouni = 0;
n->nobcast = 0;
/* Flush any MAC and VLAN filter table state */
n->mac_table.in_use = 0;
@ -114,7 +122,8 @@ static uint32_t virtio_net_get_features(VirtIODevice *vdev)
(1 << VIRTIO_NET_F_STATUS) |
(1 << VIRTIO_NET_F_CTRL_VQ) |
(1 << VIRTIO_NET_F_CTRL_RX) |
(1 << VIRTIO_NET_F_CTRL_VLAN);
(1 << VIRTIO_NET_F_CTRL_VLAN) |
(1 << VIRTIO_NET_F_CTRL_RX_EXTRA);
return features;
}
@ -157,6 +166,14 @@ static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
n->promisc = on;
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLMULTI)
n->allmulti = on;
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_ALLUNI)
n->alluni = on;
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOMULTI)
n->nomulti = on;
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOUNI)
n->nouni = on;
else if (cmd == VIRTIO_NET_CTRL_RX_MODE_NOBCAST)
n->nobcast = on;
else
return VIRTIO_NET_ERR;
@ -360,7 +377,9 @@ static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
if (ptr[0] & 1) { // multicast
if (!memcmp(ptr, bcast, sizeof(bcast))) {
return 1;
return !n->nobcast;
} else if (n->nomulti) {
return 0;
} else if (n->allmulti || n->mac_table.multi_overflow) {
return 1;
}
@ -371,7 +390,9 @@ static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
}
}
} else { // unicast
if (n->mac_table.uni_overflow) {
if (n->nouni) {
return 0;
} else if (n->alluni || n->mac_table.uni_overflow) {
return 1;
} else if (!memcmp(ptr, n->mac, ETH_ALEN)) {
return 1;
@ -554,6 +575,10 @@ static void virtio_net_save(QEMUFile *f, void *opaque)
qemu_put_be32(f, 0); /* vnet-hdr placeholder */
qemu_put_byte(f, n->mac_table.multi_overflow);
qemu_put_byte(f, n->mac_table.uni_overflow);
qemu_put_byte(f, n->alluni);
qemu_put_byte(f, n->nomulti);
qemu_put_byte(f, n->nouni);
qemu_put_byte(f, n->nobcast);
}
static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
@ -610,6 +635,13 @@ static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
n->mac_table.uni_overflow = qemu_get_byte(f);
}
if (version_id >= 10) {
n->alluni = qemu_get_byte(f);
n->nomulti = qemu_get_byte(f);
n->nouni = qemu_get_byte(f);
n->nobcast = qemu_get_byte(f);
}
/* Find the first multicast entry in the saved MAC filter */
for (i = 0; i < n->mac_table.in_use; i++) {
if (n->mac_table.macs[i * ETH_ALEN] & 1) {

14
hw/virtio-net.h
View File

@ -43,6 +43,7 @@
#define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */
#define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */
#define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */
#define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */
#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
@ -103,14 +104,19 @@ typedef uint8_t virtio_net_ctrl_ack;
#define VIRTIO_NET_ERR 1
/*
* Control the RX mode, ie. promisucous and allmulti. PROMISC and
* ALLMULTI commands require an "out" sg entry containing a 1 byte
* state value, zero = disable, non-zero = enable. These commands
* are supported with the VIRTIO_NET_F_CTRL_RX feature.
* Control the RX mode, ie. promisucous, allmulti, etc...
* All commands require an "out" sg entry containing a 1 byte
* state value, zero = disable, non-zero = enable. Commands
* 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
* Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
*/
#define VIRTIO_NET_CTRL_RX_MODE 0
#define VIRTIO_NET_CTRL_RX_MODE_PROMISC 0
#define VIRTIO_NET_CTRL_RX_MODE_ALLMULTI 1
#define VIRTIO_NET_CTRL_RX_MODE_ALLUNI 2
#define VIRTIO_NET_CTRL_RX_MODE_NOMULTI 3
#define VIRTIO_NET_CTRL_RX_MODE_NOUNI 4
#define VIRTIO_NET_CTRL_RX_MODE_NOBCAST 5
/*
* Control the MAC filter table.