From: Laurent Vivier <lviv...@redhat.com>
Previously, the vhost_net_get_feature_bits() function in
hw/net/vhost_net.c used a large switch statement to determine
the appropriate feature bits based on the NetClientDriver type.
This created unnecessary coupling between the generic vhost layer
and specific network backends (like TAP, vhost-user, and
vhost-vdpa).
This patch moves the definition of vhost feature bits directly into the
vhost_net structure for each relevant network client.
Signed-off-by: Laurent Vivier <lviv...@redhat.com>
Signed-off-by: Jason Wang <jasow...@redhat.com>
---
hw/net/vhost_net.c | 90 ++-------------------------------------
include/hw/virtio/vhost.h | 1 +
include/net/vhost-vdpa.h | 2 -
include/net/vhost_net.h | 1 +
net/tap.c | 19 +++++++++
net/vhost-user.c | 43 +++++++++++++++++++
net/vhost-vdpa.c | 3 +-
7 files changed, 69 insertions(+), 90 deletions(-)
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index db8b97b753..787c769ccc 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -36,94 +36,9 @@
#include "hw/virtio/virtio-bus.h"
#include "linux-headers/linux/vhost.h"
-
-/* Features supported by host kernel. */
-static const int kernel_feature_bits[] = {
- VIRTIO_F_NOTIFY_ON_EMPTY,
- VIRTIO_RING_F_INDIRECT_DESC,
- VIRTIO_RING_F_EVENT_IDX,
- VIRTIO_NET_F_MRG_RXBUF,
- VIRTIO_F_VERSION_1,
- VIRTIO_NET_F_MTU,
- VIRTIO_F_IOMMU_PLATFORM,
- VIRTIO_F_RING_PACKED,
- VIRTIO_F_RING_RESET,
- VIRTIO_F_IN_ORDER,
- VIRTIO_F_NOTIFICATION_DATA,
- VIRTIO_NET_F_RSC_EXT,
- VIRTIO_NET_F_HASH_REPORT,
- VHOST_INVALID_FEATURE_BIT
-};
-
-/* Features supported by others. */
-static const int user_feature_bits[] = {
- VIRTIO_F_NOTIFY_ON_EMPTY,
- VIRTIO_F_NOTIFICATION_DATA,
- VIRTIO_RING_F_INDIRECT_DESC,
- VIRTIO_RING_F_EVENT_IDX,
-
- VIRTIO_F_ANY_LAYOUT,
- VIRTIO_F_VERSION_1,
- VIRTIO_NET_F_CSUM,
- VIRTIO_NET_F_GUEST_CSUM,
- VIRTIO_NET_F_GSO,
- VIRTIO_NET_F_GUEST_TSO4,
- VIRTIO_NET_F_GUEST_TSO6,
- VIRTIO_NET_F_GUEST_ECN,
- VIRTIO_NET_F_GUEST_UFO,
- VIRTIO_NET_F_HOST_TSO4,
- VIRTIO_NET_F_HOST_TSO6,
- VIRTIO_NET_F_HOST_ECN,
- VIRTIO_NET_F_HOST_UFO,
- VIRTIO_NET_F_MRG_RXBUF,
- VIRTIO_NET_F_MTU,
- VIRTIO_F_IOMMU_PLATFORM,
- VIRTIO_F_RING_PACKED,
- VIRTIO_F_RING_RESET,
- VIRTIO_F_IN_ORDER,
- VIRTIO_NET_F_RSS,
- VIRTIO_NET_F_RSC_EXT,
- VIRTIO_NET_F_HASH_REPORT,
- VIRTIO_NET_F_GUEST_USO4,
- VIRTIO_NET_F_GUEST_USO6,
- VIRTIO_NET_F_HOST_USO,
-
- /* This bit implies RARP isn't sent by QEMU out of band */
- VIRTIO_NET_F_GUEST_ANNOUNCE,
-
- VIRTIO_NET_F_MQ,
-
- VHOST_INVALID_FEATURE_BIT
-};
-
-static const int *vhost_net_get_feature_bits(struct vhost_net *net)
-{
- const int *feature_bits = 0;
-
- switch (net->nc->info->type) {
- case NET_CLIENT_DRIVER_TAP:
- feature_bits = kernel_feature_bits;
- break;
- case NET_CLIENT_DRIVER_VHOST_USER:
- feature_bits = user_feature_bits;
- break;
-#ifdef CONFIG_VHOST_NET_VDPA
- case NET_CLIENT_DRIVER_VHOST_VDPA:
- feature_bits = vdpa_feature_bits;
- break;
-#endif
- default:
- error_report("Feature bits not defined for this type: %d",
- net->nc->info->type);
- break;
- }
-
- return feature_bits;
-}
-
uint64_t vhost_net_get_features(struct vhost_net *net, uint64_t features)
{
- return vhost_get_features(&net->dev, vhost_net_get_feature_bits(net),
+ return vhost_get_features(&net->dev, net->feature_bits,
features);
}
int vhost_net_get_config(struct vhost_net *net, uint8_t *config,
@@ -140,7 +55,7 @@ int vhost_net_set_config(struct vhost_net *net, const
uint8_t *data,
void vhost_net_ack_features(struct vhost_net *net, uint64_t features)
{
net->dev.acked_features = net->dev.backend_features;
- vhost_ack_features(&net->dev, vhost_net_get_feature_bits(net), features);
+ vhost_ack_features(&net->dev, net->feature_bits, features);
}
uint64_t vhost_net_get_max_queues(VHostNetState *net)
@@ -329,6 +244,7 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
}
net->nc = options->net_backend;
net->dev.nvqs = options->nvqs;
+ net->feature_bits = options->feature_bits;
net->dev.max_queues = 1;
net->dev.vqs = net->vqs;
diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h
index 38800a7156..6a75fdc021 100644
--- a/include/hw/virtio/vhost.h
+++ b/include/hw/virtio/vhost.h
@@ -143,6 +143,7 @@ struct vhost_net {
struct vhost_dev dev;
struct vhost_virtqueue vqs[2];
int backend;
+ const int *feature_bits;
NetClientState *nc;
};
diff --git a/include/net/vhost-vdpa.h b/include/net/vhost-vdpa.h
index 916ead3793..f8d7d6c904 100644
--- a/include/net/vhost-vdpa.h
+++ b/include/net/vhost-vdpa.h
@@ -14,6 +14,4 @@
#define TYPE_VHOST_VDPA "vhost-vdpa"
-extern const int vdpa_feature_bits[];
-
#endif /* VHOST_VDPA_H */
diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h
index 0f40049f34..fbed37385a 100644
--- a/include/net/vhost_net.h
+++ b/include/net/vhost_net.h
@@ -12,6 +12,7 @@ typedef struct VhostNetOptions {
NetClientState *net_backend;
uint32_t busyloop_timeout;
unsigned int nvqs;
+ const int *feature_bits;
void *opaque;
} VhostNetOptions;
diff --git a/net/tap.c b/net/tap.c
index 4beba6d7a7..a33eb23212 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -42,11 +42,29 @@
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
#include "qemu/sockets.h"
+#include "hw/virtio/vhost.h"
#include "net/tap.h"
#include "net/vhost_net.h"
+static const int kernel_feature_bits[] = {
+ VIRTIO_F_NOTIFY_ON_EMPTY,
+ VIRTIO_RING_F_INDIRECT_DESC,
+ VIRTIO_RING_F_EVENT_IDX,
+ VIRTIO_NET_F_MRG_RXBUF,
+ VIRTIO_F_VERSION_1,
+ VIRTIO_NET_F_MTU,
+ VIRTIO_F_IOMMU_PLATFORM,
+ VIRTIO_F_RING_PACKED,
+ VIRTIO_F_RING_RESET,
+ VIRTIO_F_IN_ORDER,
+ VIRTIO_F_NOTIFICATION_DATA,
+ VIRTIO_NET_F_RSC_EXT,
+ VIRTIO_NET_F_HASH_REPORT,
+ VHOST_INVALID_FEATURE_BIT
+};
+
typedef struct TAPState {
NetClientState nc;
int fd;
@@ -725,6 +743,7 @@ static void net_init_tap_one(const NetdevTapOptions *tap,
NetClientState *peer,
}
options.opaque = (void *)(uintptr_t)vhostfd;
options.nvqs = 2;
+ options.feature_bits = kernel_feature_bits;
s->vhost_net = vhost_net_init(&options);
if (!s->vhost_net) {
diff --git a/net/vhost-user.c b/net/vhost-user.c
index b7bf0d2042..bc8e82a092 100644
--- a/net/vhost-user.c
+++ b/net/vhost-user.c
@@ -12,7 +12,9 @@
#include "clients.h"
#include "net/vhost_net.h"
#include "net/vhost-user.h"
+#include "hw/virtio/vhost.h"
#include "hw/virtio/vhost-user.h"
+#include "standard-headers/linux/virtio_net.h"
#include "chardev/char-fe.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-net.h"
@@ -22,6 +24,46 @@
#include "qemu/option.h"
#include "trace.h"
+static const int user_feature_bits[] = {
+ VIRTIO_F_NOTIFY_ON_EMPTY,
+ VIRTIO_F_NOTIFICATION_DATA,
+ VIRTIO_RING_F_INDIRECT_DESC,
+ VIRTIO_RING_F_EVENT_IDX,
+
+ VIRTIO_F_ANY_LAYOUT,
+ VIRTIO_F_VERSION_1,
+ VIRTIO_NET_F_CSUM,
+ VIRTIO_NET_F_GUEST_CSUM,
+ VIRTIO_NET_F_GSO,
+ VIRTIO_NET_F_GUEST_TSO4,
+ VIRTIO_NET_F_GUEST_TSO6,
+ VIRTIO_NET_F_GUEST_ECN,
+ VIRTIO_NET_F_GUEST_UFO,
+ VIRTIO_NET_F_HOST_TSO4,
+ VIRTIO_NET_F_HOST_TSO6,
+ VIRTIO_NET_F_HOST_ECN,
+ VIRTIO_NET_F_HOST_UFO,
+ VIRTIO_NET_F_MRG_RXBUF,
+ VIRTIO_NET_F_MTU,
+ VIRTIO_F_IOMMU_PLATFORM,
+ VIRTIO_F_RING_PACKED,
+ VIRTIO_F_RING_RESET,
+ VIRTIO_F_IN_ORDER,
+ VIRTIO_NET_F_RSS,
+ VIRTIO_NET_F_RSC_EXT,
+ VIRTIO_NET_F_HASH_REPORT,
+ VIRTIO_NET_F_GUEST_USO4,
+ VIRTIO_NET_F_GUEST_USO6,
+ VIRTIO_NET_F_HOST_USO,
+
+ /* This bit implies RARP isn't sent by QEMU out of band */
+ VIRTIO_NET_F_GUEST_ANNOUNCE,
+
+ VIRTIO_NET_F_MQ,
+
+ VHOST_INVALID_FEATURE_BIT
+};
+
typedef struct NetVhostUserState {
NetClientState nc;
CharBackend chr; /* only queue index 0 */
@@ -96,6 +138,7 @@ static int vhost_user_start(int queues, NetClientState
*ncs[],
options.opaque = be;
options.busyloop_timeout = 0;
options.nvqs = 2;
+ options.feature_bits = user_feature_bits;
net = vhost_net_init(&options);
if (!net) {
error_report("failed to init vhost_net for queue %d", i);
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 0b86c917ed..cbbea0eb71 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -55,7 +55,7 @@ typedef struct VhostVDPAState {
* with the exception of VHOST_INVALID_FEATURE_BIT,
* which should always be the last entry.
*/
-const int vdpa_feature_bits[] = {
+static const int vdpa_feature_bits[] = {
VIRTIO_F_ANY_LAYOUT,
VIRTIO_F_IOMMU_PLATFORM,
VIRTIO_F_NOTIFY_ON_EMPTY,
@@ -201,6 +201,7 @@ static int vhost_vdpa_add(NetClientState *ncs, void *be,
options.opaque = be;
options.busyloop_timeout = 0;
options.nvqs = nvqs;
+ options.feature_bits = vdpa_feature_bits;
net = vhost_net_init(&options);
if (!net) {
--
2.42.0
