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qemu-kvm/SOURCES/kvm-vhost-user-introduce-shared-vhost-user-state.patch

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From 080469ac5a5f9b0ab1d3001001b9939425023f93 Mon Sep 17 00:00:00 2001
From: "plai@redhat.com" <plai@redhat.com>
Date: Thu, 21 Jun 2018 18:54:43 +0200
Subject: [PATCH 164/268] vhost-user: introduce shared vhost-user state
RH-Author: plai@redhat.com
Message-id: <1529607285-9942-9-git-send-email-plai@redhat.com>
Patchwork-id: 80942
O-Subject: [RHEL7.6 PATCH BZ 1526645 08/10] vhost-user: introduce shared vhost-user state
Bugzilla: 1526645
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
RH-Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
From: Tiwei Bie <tiwei.bie@intel.com>
When multi queue is enabled e.g. for a virtio-net device,
each queue pair will have a vhost_dev, and the only thing
shared between vhost devs currently is the chardev. This
patch introduces a vhost-user state structure which will
be shared by all vhost devs of the same virtio device.
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 4d0cf552d3a9585f380e8abdc313e4d416a56aa0)
Signed-off-by: Paul Lai <plai@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
backends/cryptodev-vhost-user.c | 20 ++++++++++++++++-
hw/block/vhost-user-blk.c | 22 ++++++++++++++++++-
hw/scsi/vhost-user-scsi.c | 20 ++++++++++++++++-
hw/virtio/Makefile.objs | 2 +-
hw/virtio/vhost-stub.c | 10 +++++++++
hw/virtio/vhost-user.c | 31 ++++++++++++++++++--------
include/hw/virtio/vhost-user-blk.h | 2 ++
include/hw/virtio/vhost-user-scsi.h | 2 ++
include/hw/virtio/vhost-user.h | 20 +++++++++++++++++
net/vhost-user.c | 44 ++++++++++++++++++++++++++++++-------
10 files changed, 152 insertions(+), 21 deletions(-)
create mode 100644 include/hw/virtio/vhost-user.h
diff --git a/backends/cryptodev-vhost-user.c b/backends/cryptodev-vhost-user.c
index 862d4f2..d52dacc 100644
--- a/backends/cryptodev-vhost-user.c
+++ b/backends/cryptodev-vhost-user.c
@@ -26,6 +26,7 @@
#include "qapi/error.h"
#include "qapi/qmp/qerror.h"
#include "qemu/error-report.h"
+#include "hw/virtio/vhost-user.h"
#include "standard-headers/linux/virtio_crypto.h"
#include "sysemu/cryptodev-vhost.h"
#include "chardev/char-fe.h"
@@ -46,6 +47,7 @@
typedef struct CryptoDevBackendVhostUser {
CryptoDevBackend parent_obj;
+ VhostUserState *vhost_user;
CharBackend chr;
char *chr_name;
bool opened;
@@ -102,7 +104,7 @@ cryptodev_vhost_user_start(int queues,
continue;
}
- options.opaque = &s->chr;
+ options.opaque = s->vhost_user;
options.backend_type = VHOST_BACKEND_TYPE_USER;
options.cc = b->conf.peers.ccs[i];
s->vhost_crypto[i] = cryptodev_vhost_init(&options);
@@ -185,6 +187,7 @@ static void cryptodev_vhost_user_init(
size_t i;
Error *local_err = NULL;
Chardev *chr;
+ VhostUserState *user;
CryptoDevBackendClient *cc;
CryptoDevBackendVhostUser *s =
CRYPTODEV_BACKEND_VHOST_USER(backend);
@@ -215,6 +218,15 @@ static void cryptodev_vhost_user_init(
}
}
+ user = vhost_user_init();
+ if (!user) {
+ error_setg(errp, "Failed to init vhost_user");
+ return;
+ }
+
+ user->chr = &s->chr;
+ s->vhost_user = user;
+
qemu_chr_fe_set_handlers(&s->chr, NULL, NULL,
cryptodev_vhost_user_event, NULL, s, NULL, true);
@@ -299,6 +311,12 @@ static void cryptodev_vhost_user_cleanup(
backend->conf.peers.ccs[i] = NULL;
}
}
+
+ if (s->vhost_user) {
+ vhost_user_cleanup(s->vhost_user);
+ g_free(s->vhost_user);
+ s->vhost_user = NULL;
+ }
}
static void cryptodev_vhost_user_set_chardev(Object *obj,
diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c
index 262baca..4021d71 100644
--- a/hw/block/vhost-user-blk.c
+++ b/hw/block/vhost-user-blk.c
@@ -229,6 +229,7 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VHostUserBlk *s = VHOST_USER_BLK(vdev);
+ VhostUserState *user;
int i, ret;
if (!s->chardev.chr) {
@@ -246,6 +247,15 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp)
return;
}
+ user = vhost_user_init();
+ if (!user) {
+ error_setg(errp, "vhost-user-blk: failed to init vhost_user");
+ return;
+ }
+
+ user->chr = &s->chardev;
+ s->vhost_user = user;
+
virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK,
sizeof(struct virtio_blk_config));
@@ -261,7 +271,7 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp)
vhost_dev_set_config_notifier(&s->dev, &blk_ops);
- ret = vhost_dev_init(&s->dev, &s->chardev, VHOST_BACKEND_TYPE_USER, 0);
+ ret = vhost_dev_init(&s->dev, s->vhost_user, VHOST_BACKEND_TYPE_USER, 0);
if (ret < 0) {
error_setg(errp, "vhost-user-blk: vhost initialization failed: %s",
strerror(-ret));
@@ -286,6 +296,10 @@ vhost_err:
virtio_err:
g_free(s->dev.vqs);
virtio_cleanup(vdev);
+
+ vhost_user_cleanup(user);
+ g_free(user);
+ s->vhost_user = NULL;
}
static void vhost_user_blk_device_unrealize(DeviceState *dev, Error **errp)
@@ -297,6 +311,12 @@ static void vhost_user_blk_device_unrealize(DeviceState *dev, Error **errp)
vhost_dev_cleanup(&s->dev);
g_free(s->dev.vqs);
virtio_cleanup(vdev);
+
+ if (s->vhost_user) {
+ vhost_user_cleanup(s->vhost_user);
+ g_free(s->vhost_user);
+ s->vhost_user = NULL;
+ }
}
static void vhost_user_blk_instance_init(Object *obj)
diff --git a/hw/scsi/vhost-user-scsi.c b/hw/scsi/vhost-user-scsi.c
index 9389ed4..9355cfd 100644
--- a/hw/scsi/vhost-user-scsi.c
+++ b/hw/scsi/vhost-user-scsi.c
@@ -69,6 +69,7 @@ static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
VHostUserSCSI *s = VHOST_USER_SCSI(dev);
VHostSCSICommon *vsc = VHOST_SCSI_COMMON(s);
+ VhostUserState *user;
Error *err = NULL;
int ret;
@@ -85,19 +86,30 @@ static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
return;
}
+ user = vhost_user_init();
+ if (!user) {
+ error_setg(errp, "vhost-user-scsi: failed to init vhost_user");
+ return;
+ }
+ user->chr = &vs->conf.chardev;
+
vsc->dev.nvqs = 2 + vs->conf.num_queues;
vsc->dev.vqs = g_new(struct vhost_virtqueue, vsc->dev.nvqs);
vsc->dev.vq_index = 0;
vsc->dev.backend_features = 0;
- ret = vhost_dev_init(&vsc->dev, (void *)&vs->conf.chardev,
+ ret = vhost_dev_init(&vsc->dev, user,
VHOST_BACKEND_TYPE_USER, 0);
if (ret < 0) {
error_setg(errp, "vhost-user-scsi: vhost initialization failed: %s",
strerror(-ret));
+ vhost_user_cleanup(user);
+ g_free(user);
return;
}
+ s->vhost_user = user;
+
/* Channel and lun both are 0 for bootable vhost-user-scsi disk */
vsc->channel = 0;
vsc->lun = 0;
@@ -117,6 +129,12 @@ static void vhost_user_scsi_unrealize(DeviceState *dev, Error **errp)
g_free(vsc->dev.vqs);
virtio_scsi_common_unrealize(dev, errp);
+
+ if (s->vhost_user) {
+ vhost_user_cleanup(s->vhost_user);
+ g_free(s->vhost_user);
+ s->vhost_user = NULL;
+ }
}
static uint64_t vhost_user_scsi_get_features(VirtIODevice *vdev,
diff --git a/hw/virtio/Makefile.objs b/hw/virtio/Makefile.objs
index a5a0936..00c6696 100644
--- a/hw/virtio/Makefile.objs
+++ b/hw/virtio/Makefile.objs
@@ -12,5 +12,5 @@ obj-$(CONFIG_VHOST_VSOCK) += vhost-vsock.o
#obj-$(CONFIG_VIRTIO_PCI) += virtio-crypto-pci.o
endif
-common-obj-$(call lnot,$(CONFIG_LINUX)) += vhost-stub.o
+common-obj-$(call lnot,$(call land,$(CONFIG_VIRTIO),$(CONFIG_LINUX))) += vhost-stub.o
common-obj-$(CONFIG_ALL) += vhost-stub.o
diff --git a/hw/virtio/vhost-stub.c b/hw/virtio/vhost-stub.c
index 2d76cde..049089b 100644
--- a/hw/virtio/vhost-stub.c
+++ b/hw/virtio/vhost-stub.c
@@ -1,7 +1,17 @@
#include "qemu/osdep.h"
#include "hw/virtio/vhost.h"
+#include "hw/virtio/vhost-user.h"
bool vhost_has_free_slot(void)
{
return true;
}
+
+VhostUserState *vhost_user_init(void)
+{
+ return NULL;
+}
+
+void vhost_user_cleanup(VhostUserState *user)
+{
+}
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index e8027ad..a715c5c 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -11,6 +11,7 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/virtio/vhost.h"
+#include "hw/virtio/vhost-user.h"
#include "hw/virtio/vhost-backend.h"
#include "hw/virtio/virtio-net.h"
#include "chardev/char-fe.h"
@@ -175,7 +176,8 @@ static VhostUserMsg m __attribute__ ((unused));
struct vhost_user {
struct vhost_dev *dev;
- CharBackend *chr;
+ /* Shared between vhost devs of the same virtio device */
+ VhostUserState *user;
int slave_fd;
NotifierWithReturn postcopy_notifier;
struct PostCopyFD postcopy_fd;
@@ -201,7 +203,7 @@ static bool ioeventfd_enabled(void)
static int vhost_user_read(struct vhost_dev *dev, VhostUserMsg *msg)
{
struct vhost_user *u = dev->opaque;
- CharBackend *chr = u->chr;
+ CharBackend *chr = u->user->chr;
uint8_t *p = (uint8_t *) msg;
int r, size = VHOST_USER_HDR_SIZE;
@@ -287,7 +289,7 @@ static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg,
int *fds, int fd_num)
{
struct vhost_user *u = dev->opaque;
- CharBackend *chr = u->chr;
+ CharBackend *chr = u->user->chr;
int ret, size = VHOST_USER_HDR_SIZE + msg->hdr.size;
/*
@@ -1090,7 +1092,7 @@ static int vhost_user_postcopy_waker(struct PostCopyFD *pcfd, RAMBlock *rb,
static int vhost_user_postcopy_advise(struct vhost_dev *dev, Error **errp)
{
struct vhost_user *u = dev->opaque;
- CharBackend *chr = u->chr;
+ CharBackend *chr = u->user->chr;
int ufd;
VhostUserMsg msg = {
.hdr.request = VHOST_USER_POSTCOPY_ADVISE,
@@ -1228,7 +1230,7 @@ static int vhost_user_postcopy_notifier(NotifierWithReturn *notifier,
return 0;
}
-static int vhost_user_init(struct vhost_dev *dev, void *opaque)
+static int vhost_user_backend_init(struct vhost_dev *dev, void *opaque)
{
uint64_t features, protocol_features;
struct vhost_user *u;
@@ -1237,7 +1239,7 @@ static int vhost_user_init(struct vhost_dev *dev, void *opaque)
assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER);
u = g_new0(struct vhost_user, 1);
- u->chr = opaque;
+ u->user = opaque;
u->slave_fd = -1;
u->dev = dev;
dev->opaque = u;
@@ -1313,7 +1315,7 @@ static int vhost_user_init(struct vhost_dev *dev, void *opaque)
return 0;
}
-static int vhost_user_cleanup(struct vhost_dev *dev)
+static int vhost_user_backend_cleanup(struct vhost_dev *dev)
{
struct vhost_user *u;
@@ -1637,10 +1639,21 @@ static bool vhost_user_mem_section_filter(struct vhost_dev *dev,
return result;
}
+VhostUserState *vhost_user_init(void)
+{
+ VhostUserState *user = g_new0(struct VhostUserState, 1);
+
+ return user;
+}
+
+void vhost_user_cleanup(VhostUserState *user)
+{
+}
+
const VhostOps user_ops = {
.backend_type = VHOST_BACKEND_TYPE_USER,
- .vhost_backend_init = vhost_user_init,
- .vhost_backend_cleanup = vhost_user_cleanup,
+ .vhost_backend_init = vhost_user_backend_init,
+ .vhost_backend_cleanup = vhost_user_backend_cleanup,
.vhost_backend_memslots_limit = vhost_user_memslots_limit,
.vhost_set_log_base = vhost_user_set_log_base,
.vhost_set_mem_table = vhost_user_set_mem_table,
diff --git a/include/hw/virtio/vhost-user-blk.h b/include/hw/virtio/vhost-user-blk.h
index 5804cc9..f1258ae 100644
--- a/include/hw/virtio/vhost-user-blk.h
+++ b/include/hw/virtio/vhost-user-blk.h
@@ -21,6 +21,7 @@
#include "hw/block/block.h"
#include "chardev/char-fe.h"
#include "hw/virtio/vhost.h"
+#include "hw/virtio/vhost-user.h"
#define TYPE_VHOST_USER_BLK "vhost-user-blk"
#define VHOST_USER_BLK(obj) \
@@ -36,6 +37,7 @@ typedef struct VHostUserBlk {
uint32_t config_wce;
uint32_t config_ro;
struct vhost_dev dev;
+ VhostUserState *vhost_user;
} VHostUserBlk;
#endif
diff --git a/include/hw/virtio/vhost-user-scsi.h b/include/hw/virtio/vhost-user-scsi.h
index 01861f7..3ec34ae 100644
--- a/include/hw/virtio/vhost-user-scsi.h
+++ b/include/hw/virtio/vhost-user-scsi.h
@@ -21,6 +21,7 @@
#include "hw/qdev.h"
#include "hw/virtio/virtio-scsi.h"
#include "hw/virtio/vhost.h"
+#include "hw/virtio/vhost-user.h"
#include "hw/virtio/vhost-scsi-common.h"
#define TYPE_VHOST_USER_SCSI "vhost-user-scsi"
@@ -30,6 +31,7 @@
typedef struct VHostUserSCSI {
VHostSCSICommon parent_obj;
uint64_t host_features;
+ VhostUserState *vhost_user;
} VHostUserSCSI;
#endif /* VHOST_USER_SCSI_H */
diff --git a/include/hw/virtio/vhost-user.h b/include/hw/virtio/vhost-user.h
new file mode 100644
index 0000000..eb8bc0d
--- /dev/null
+++ b/include/hw/virtio/vhost-user.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2017-2018 Intel Corporation
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef HW_VIRTIO_VHOST_USER_H
+#define HW_VIRTIO_VHOST_USER_H
+
+#include "chardev/char-fe.h"
+
+typedef struct VhostUserState {
+ CharBackend *chr;
+} VhostUserState;
+
+VhostUserState *vhost_user_init(void);
+void vhost_user_cleanup(VhostUserState *user);
+
+#endif
diff --git a/net/vhost-user.c b/net/vhost-user.c
index fa28aad..608b837 100644
--- a/net/vhost-user.c
+++ b/net/vhost-user.c
@@ -12,6 +12,7 @@
#include "clients.h"
#include "net/vhost_net.h"
#include "net/vhost-user.h"
+#include "hw/virtio/vhost-user.h"
#include "chardev/char-fe.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-net.h"
@@ -23,6 +24,7 @@
typedef struct NetVhostUserState {
NetClientState nc;
CharBackend chr; /* only queue index 0 */
+ VhostUserState *vhost_user;
VHostNetState *vhost_net;
guint watch;
uint64_t acked_features;
@@ -64,7 +66,8 @@ static void vhost_user_stop(int queues, NetClientState *ncs[])
}
}
-static int vhost_user_start(int queues, NetClientState *ncs[], CharBackend *be)
+static int vhost_user_start(int queues, NetClientState *ncs[],
+ VhostUserState *be)
{
VhostNetOptions options;
struct vhost_net *net = NULL;
@@ -144,7 +147,7 @@ static ssize_t vhost_user_receive(NetClientState *nc, const uint8_t *buf,
return size;
}
-static void vhost_user_cleanup(NetClientState *nc)
+static void net_vhost_user_cleanup(NetClientState *nc)
{
NetVhostUserState *s = DO_UPCAST(NetVhostUserState, nc, nc);
@@ -159,6 +162,11 @@ static void vhost_user_cleanup(NetClientState *nc)
s->watch = 0;
}
qemu_chr_fe_deinit(&s->chr, true);
+ if (s->vhost_user) {
+ vhost_user_cleanup(s->vhost_user);
+ g_free(s->vhost_user);
+ s->vhost_user = NULL;
+ }
}
qemu_purge_queued_packets(nc);
@@ -182,7 +190,7 @@ static NetClientInfo net_vhost_user_info = {
.type = NET_CLIENT_DRIVER_VHOST_USER,
.size = sizeof(NetVhostUserState),
.receive = vhost_user_receive,
- .cleanup = vhost_user_cleanup,
+ .cleanup = net_vhost_user_cleanup,
.has_vnet_hdr = vhost_user_has_vnet_hdr,
.has_ufo = vhost_user_has_ufo,
};
@@ -244,7 +252,7 @@ static void net_vhost_user_event(void *opaque, int event)
trace_vhost_user_event(chr->label, event);
switch (event) {
case CHR_EVENT_OPENED:
- if (vhost_user_start(queues, ncs, &s->chr) < 0) {
+ if (vhost_user_start(queues, ncs, s->vhost_user) < 0) {
qemu_chr_fe_disconnect(&s->chr);
return;
}
@@ -283,12 +291,19 @@ static int net_vhost_user_init(NetClientState *peer, const char *device,
{
Error *err = NULL;
NetClientState *nc, *nc0 = NULL;
- NetVhostUserState *s;
+ VhostUserState *user = NULL;
+ NetVhostUserState *s = NULL;
int i;
assert(name);
assert(queues > 0);
+ user = vhost_user_init();
+ if (!user) {
+ error_report("failed to init vhost_user");
+ goto err;
+ }
+
for (i = 0; i < queues; i++) {
nc = qemu_new_net_client(&net_vhost_user_info, peer, device, name);
snprintf(nc->info_str, sizeof(nc->info_str), "vhost-user%d to %s",
@@ -299,17 +314,19 @@ static int net_vhost_user_init(NetClientState *peer, const char *device,
s = DO_UPCAST(NetVhostUserState, nc, nc);
if (!qemu_chr_fe_init(&s->chr, chr, &err)) {
error_report_err(err);
- return -1;
+ goto err;
}
+ user->chr = &s->chr;
}
-
+ s = DO_UPCAST(NetVhostUserState, nc, nc);
+ s->vhost_user = user;
}
s = DO_UPCAST(NetVhostUserState, nc, nc0);
do {
if (qemu_chr_fe_wait_connected(&s->chr, &err) < 0) {
error_report_err(err);
- return -1;
+ goto err;
}
qemu_chr_fe_set_handlers(&s->chr, NULL, NULL,
net_vhost_user_event, NULL, nc0->name, NULL,
@@ -319,6 +336,17 @@ static int net_vhost_user_init(NetClientState *peer, const char *device,
assert(s->vhost_net);
return 0;
+
+err:
+ if (user) {
+ vhost_user_cleanup(user);
+ g_free(user);
+ if (s) {
+ s->vhost_user = NULL;
+ }
+ }
+
+ return -1;
}
static Chardev *net_vhost_claim_chardev(
--
1.8.3.1
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