* [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support
@ 2015-09-15 7:10 Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 1/7] vhost-user: use VHOST_USER_XXX macro for switch statement Yuanhan Liu
` (10 more replies)
0 siblings, 11 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-15 7:10 UTC (permalink / raw)
To: qemu-devel; +Cc: jasowang, changchun.ouyang, Yuanhan Liu, mst
Hi,
Here is the updated patch set for enabling vhost-user multiple queue.
This patch set introduces 2 more vhost user messages: VHOST_USER_GET_QUEUE_NUM,
for querying how many queues the backend supports, and VHOST_USER_SET_VRING_ENABLE,
for enabling/disabling a specific virt queue.
Both of the two new messages are treated as vhost protocol extension,
and that's why Michaels's patch "vhost-user: add protocol feature
negotiation" is also included here.
Patch 1-5 are all prepare works for actually enabling multiple queue.
Patch 6 is the major patch for enabling multiple queue, which also tries
to address two major concerns from Michael: no feedback from backend if
it can't support # of requested queues, and all messages are sent N time.
It also fixes a hidden bug.
Patch 7 introduces the VHOST_USER_SET_VRING_ENABLE message, to enable
or disable a specific vring.
Note that I haven't done any formal test yet, it just passes build
test and basic functional test, such as it does exit when backend
doesn't support # of requested queues. Here I sent it out just for
more comments, and for avoiding spending too much effort on the wrong
track.
v9: - Per suggested by Jason Wang, patch 5 introduces a new vhost
backend method: vhost_backend_get_vq_index().
- Use qemu_find_net_clients_except() at net/vhost-user.c for
gathering all related ncs so that we could register chr dev
event handler once. Which is also suggested by Jason Wang.
Thanks.
--yliu
---
Changchun Ouyang (2):
vhost-user: add multiple queue support
vhost-user: add a new message to disable/enable a specific virt queue.
Michael S. Tsirkin (1):
vhost-user: add protocol feature negotiation
Yuanhan Liu (4):
vhost-user: use VHOST_USER_XXX macro for switch statement
vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE
vhost-user: add VHOST_USER_GET_QUEUE_NUM message
vhost: introduce vhost_backend_get_vq_index method
docs/specs/vhost-user.txt | 75 +++++++++++++++++++-
hw/net/vhost_net.c | 39 ++++++++--
hw/net/virtio-net.c | 8 +++
hw/virtio/vhost-backend.c | 10 ++-
hw/virtio/vhost-user.c | 143 +++++++++++++++++++++++++++++++------
hw/virtio/vhost.c | 20 +++---
include/hw/virtio/vhost-backend.h | 4 ++
include/hw/virtio/vhost.h | 2 +
include/net/vhost_net.h | 3 +
linux-headers/linux/vhost.h | 2 +-
net/vhost-user.c | 146 +++++++++++++++++++++++++++-----------
qapi-schema.json | 6 +-
qemu-options.hx | 5 +-
tests/vhost-user-test.c | 2 +-
14 files changed, 380 insertions(+), 85 deletions(-)
--
1.9.0
^ permalink raw reply [flat|nested] 27+ messages in thread
* [Qemu-devel] [PATCH 1/7] vhost-user: use VHOST_USER_XXX macro for switch statement
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
@ 2015-09-15 7:10 ` Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 1/2] vhost-user: add multiple queue support Yuanhan Liu
` (9 subsequent siblings)
10 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-15 7:10 UTC (permalink / raw)
To: qemu-devel; +Cc: jasowang, changchun.ouyang, Yuanhan Liu, mst
So that we could let vhost_user_call to handle extented requests,
such as VHOST_USER_GET/SET_PROTOCOL_FEATURES, instead of invoking
vhost_user_read/write and constructing the msg again by ourself.
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
hw/virtio/vhost-user.c | 38 ++++++++++++++++++++++----------------
1 file changed, 22 insertions(+), 16 deletions(-)
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index e7ab829..13677ac 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -193,27 +193,33 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER);
- msg_request = vhost_user_request_translate(request);
+ /* only translate vhost ioctl requests */
+ if (request > VHOST_USER_MAX) {
+ msg_request = vhost_user_request_translate(request);
+ } else {
+ msg_request = request;
+ }
+
msg.request = msg_request;
msg.flags = VHOST_USER_VERSION;
msg.size = 0;
- switch (request) {
- case VHOST_GET_FEATURES:
+ switch (msg_request) {
+ case VHOST_USER_GET_FEATURES:
need_reply = 1;
break;
- case VHOST_SET_FEATURES:
- case VHOST_SET_LOG_BASE:
+ case VHOST_USER_SET_FEATURES:
+ case VHOST_USER_SET_LOG_BASE:
msg.u64 = *((__u64 *) arg);
msg.size = sizeof(m.u64);
break;
- case VHOST_SET_OWNER:
- case VHOST_RESET_OWNER:
+ case VHOST_USER_SET_OWNER:
+ case VHOST_USER_RESET_OWNER:
break;
- case VHOST_SET_MEM_TABLE:
+ case VHOST_USER_SET_MEM_TABLE:
for (i = 0; i < dev->mem->nregions; ++i) {
struct vhost_memory_region *reg = dev->mem->regions + i;
ram_addr_t ram_addr;
@@ -246,30 +252,30 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
break;
- case VHOST_SET_LOG_FD:
+ case VHOST_USER_SET_LOG_FD:
fds[fd_num++] = *((int *) arg);
break;
- case VHOST_SET_VRING_NUM:
- case VHOST_SET_VRING_BASE:
+ case VHOST_USER_SET_VRING_NUM:
+ case VHOST_USER_SET_VRING_BASE:
memcpy(&msg.state, arg, sizeof(struct vhost_vring_state));
msg.size = sizeof(m.state);
break;
- case VHOST_GET_VRING_BASE:
+ case VHOST_USER_GET_VRING_BASE:
memcpy(&msg.state, arg, sizeof(struct vhost_vring_state));
msg.size = sizeof(m.state);
need_reply = 1;
break;
- case VHOST_SET_VRING_ADDR:
+ case VHOST_USER_SET_VRING_ADDR:
memcpy(&msg.addr, arg, sizeof(struct vhost_vring_addr));
msg.size = sizeof(m.addr);
break;
- case VHOST_SET_VRING_KICK:
- case VHOST_SET_VRING_CALL:
- case VHOST_SET_VRING_ERR:
+ case VHOST_USER_SET_VRING_KICK:
+ case VHOST_USER_SET_VRING_CALL:
+ case VHOST_USER_SET_VRING_ERR:
file = arg;
msg.u64 = file->index & VHOST_USER_VRING_IDX_MASK;
msg.size = sizeof(m.u64);
--
1.9.0
^ permalink raw reply related [flat|nested] 27+ messages in thread
* [Qemu-devel] [PATCH 1/2] vhost-user: add multiple queue support
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 1/7] vhost-user: use VHOST_USER_XXX macro for switch statement Yuanhan Liu
@ 2015-09-15 7:10 ` Yuanhan Liu
2015-09-15 14:56 ` Eric Blake
2015-09-15 7:10 ` [Qemu-devel] [PATCH 2/7] vhost-user: add protocol feature negotiation Yuanhan Liu
` (8 subsequent siblings)
10 siblings, 1 reply; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-15 7:10 UTC (permalink / raw)
To: qemu-devel; +Cc: jasowang, changchun.ouyang, Yuanhan Liu, mst
From: Changchun Ouyang <changchun.ouyang@intel.com>
This patch is initially based a patch from Nikolay Nikolaev.
Here is the latest version for adding vhost-user multiple queue support,
by creating a nc and vhost_net pair for each queue.
What differs from last version is that this patch addresses two major
concerns from Michael, and fixes one hidden bug.
- Concern #1: no feedback when the backend can't support # of
requested queues(by providing queues=# option).
Here we address this issue by querying VHOST_USER_PROTOCOL_F_MQ
protocol features first, if not set, it means the backend don't
support mq feature, and let max_queues be 1. Otherwise, we send
another message, VHOST_USER_GET_QUEUE_NUM, for getting the max_queues
the backend supports.
At vhost-user initiation stage(net_vhost_user_start), we then initiate
one queue first, which, in the meantime, also gets the max_queues.
We then do a simple compare: if requested_queues > max_queues, we
exit(I guess it's safe to exit here, as the vm is not running yet).
- Concern #2: some messages are sent more times than necessary.
We came an agreement with Michael that we could categorize vhost
user messages to 2 types: none-vring specific messages, which should
be sent only once, and vring specific messages, which should be sent
per queue.
Here I introduced a helper function vhost_user_one_time_request(),
which lists following messages as none-vring specific messages:
VHOST_USER_GET_FEATURES
VHOST_USER_SET_FEATURES
VHOST_USER_GET_PROTOCOL_FEATURES
VHOST_USER_SET_PROTOCOL_FEATURES
VHOST_USER_SET_OWNER
VHOST_USER_RESET_DEVICE
VHOST_USER_SET_MEM_TABLE
VHOST_USER_GET_QUEUE_NUM
For above messages, we simply ignore them when they are not sent the first
time.
I also observed a hidden bug from last version. We register the char dev
event handler N times, which is not necessary, as well as buggy: A later
register overwrites the former one, as qemu_chr_add_handlers() will not
chain those handlers, but instead overwrites the old one. So, in theory,
invoking qemu_chr_add_handlers N times will not end up with calling the
handler N times.
However, the reason the handler is invoked N times is because we start
the backend(the connection server) first, and hence when net_vhost_user_init()
is executed, the connection is already established, and qemu_chr_add_handlers()
then invoke the handler immediately, which just looks like we invoke the
handler(net_vhost_user_event) directly from net_vhost_user_init().
The solution I came up with is to make VhostUserState as an upper level
structure, making it includes N nc and vhost_net pairs:
typedef struct VhostUserNetPair {
NetClientState *nc;
VHostNetState *vhost_net;
} VhostUserNetPair;
typedef struct VhostUserState {
CharDriverState *chr;
bool running;
int queues;
struct VhostUserNetPair pairs[];
} VhostUserState;
v8: set net->dev.vq_index correctly inside vhost_net_init() based on the
value from net->nc->queue_index.
Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
docs/specs/vhost-user.txt | 13 +++++
hw/net/vhost_net.c | 5 +-
hw/virtio/vhost-user.c | 32 ++++++++++-
include/net/net.h | 1 +
net/vhost-user.c | 140 +++++++++++++++++++++++++++++++++-------------
qapi-schema.json | 6 +-
qemu-options.hx | 5 +-
7 files changed, 157 insertions(+), 45 deletions(-)
diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
index 43db9b4..acf5708 100644
--- a/docs/specs/vhost-user.txt
+++ b/docs/specs/vhost-user.txt
@@ -135,6 +135,19 @@ As older slaves don't support negotiating protocol features,
a feature bit was dedicated for this purpose:
#define VHOST_USER_F_PROTOCOL_FEATURES 30
+Multiple queue support
+-------------------
+Multiple queue is treated as a protocol extension, hence the slave has to
+implement protocol features first. Multiple queues is supported only when
+the protocol feature VHOST_USER_PROTOCOL_F_MQ(bit 0) is set.
+
+The max number of queues the slave supports can be queried with message
+VHOST_USER_GET_PROTOCOL_FEATURES. Master should stop when the number of
+requested queues is bigger than that.
+
+As all queues share one connection, the master uses a unique index for each
+queue in the sent message to identify a specified queue.
+
Message types
-------------
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index f9441e9..0eda2ed 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -148,6 +148,7 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
fprintf(stderr, "vhost-net requires net backend to be setup\n");
goto fail;
}
+ net->nc = options->net_backend;
net->dev.max_queues = 1;
@@ -164,8 +165,10 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
net->dev.backend_features = 0;
net->dev.protocol_features = 0;
net->backend = -1;
+
+ /* vhost-user needs vq_index to initiate a specific queue pair */
+ net->dev.vq_index = net->nc->queue_index * 2;
}
- net->nc = options->net_backend;
net->dev.nvqs = 2;
net->dev.vqs = net->vqs;
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index 8b4b36b..7922eb7 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -187,6 +187,23 @@ static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg,
0 : -1;
}
+static bool vhost_user_one_time_request(VhostUserRequest request)
+{
+ switch (request) {
+ case VHOST_USER_GET_FEATURES:
+ case VHOST_USER_SET_FEATURES:
+ case VHOST_USER_GET_PROTOCOL_FEATURES:
+ case VHOST_USER_SET_PROTOCOL_FEATURES:
+ case VHOST_USER_SET_OWNER:
+ case VHOST_USER_RESET_DEVICE:
+ case VHOST_USER_SET_MEM_TABLE:
+ case VHOST_USER_GET_QUEUE_NUM:
+ return true;
+ default:
+ return false;
+ }
+}
+
static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
void *arg)
{
@@ -207,6 +224,15 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
msg_request = request;
}
+ /*
+ * For none-vring specific requests, like VHOST_USER_GET_FEATURES,
+ * we just need send it once in the first time. For later such
+ * request, we just ignore it.
+ */
+ if (vhost_user_one_time_request(msg_request) && dev->vq_index != 0) {
+ return 0;
+ }
+
msg.request = msg_request;
msg.flags = VHOST_USER_VERSION;
msg.size = 0;
@@ -269,17 +295,20 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
case VHOST_USER_SET_VRING_NUM:
case VHOST_USER_SET_VRING_BASE:
memcpy(&msg.state, arg, sizeof(struct vhost_vring_state));
+ msg.addr.index += dev->vq_index;
msg.size = sizeof(m.state);
break;
case VHOST_USER_GET_VRING_BASE:
memcpy(&msg.state, arg, sizeof(struct vhost_vring_state));
+ msg.addr.index += dev->vq_index;
msg.size = sizeof(m.state);
need_reply = 1;
break;
case VHOST_USER_SET_VRING_ADDR:
memcpy(&msg.addr, arg, sizeof(struct vhost_vring_addr));
+ msg.addr.index += dev->vq_index;
msg.size = sizeof(m.addr);
break;
@@ -287,7 +316,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
case VHOST_USER_SET_VRING_CALL:
case VHOST_USER_SET_VRING_ERR:
file = arg;
- msg.u64 = file->index & VHOST_USER_VRING_IDX_MASK;
+ msg.u64 = (file->index + dev->vq_index) & VHOST_USER_VRING_IDX_MASK;
msg.size = sizeof(m.u64);
if (ioeventfd_enabled() && file->fd > 0) {
fds[fd_num++] = file->fd;
@@ -331,6 +360,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
error_report("Received bad msg size.");
return -1;
}
+ msg.state.index -= dev->vq_index;
memcpy(arg, &msg.state, sizeof(struct vhost_vring_state));
break;
default:
diff --git a/include/net/net.h b/include/net/net.h
index 6a6cbef..6f20656 100644
--- a/include/net/net.h
+++ b/include/net/net.h
@@ -92,6 +92,7 @@ struct NetClientState {
NetClientDestructor *destructor;
unsigned int queue_index;
unsigned rxfilter_notify_enabled:1;
+ void *opaque;
};
typedef struct NICState {
diff --git a/net/vhost-user.c b/net/vhost-user.c
index 93dcecd..13539b3 100644
--- a/net/vhost-user.c
+++ b/net/vhost-user.c
@@ -29,48 +35,81 @@ typedef struct VhostUserChardevProps {
VHostNetState *vhost_user_get_vhost_net(NetClientState *nc)
{
- VhostUserState *s = DO_UPCAST(VhostUserState, nc, nc);
+ VhostUserState *s = nc->opaque;
assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
- return s->vhost_net;
-}
-
-static int vhost_user_running(VhostUserState *s)
-{
- return (s->vhost_net) ? 1 : 0;
+ return s->pairs[nc->queue_index].vhost_net;
}
static int vhost_user_start(VhostUserState *s)
{
VhostNetOptions options;
+ VHostNetState *vhost_net;
+ int max_queues;
+ int i = 0;
- if (vhost_user_running(s)) {
+ if (s->running) {
return 0;
}
options.backend_type = VHOST_BACKEND_TYPE_USER;
- options.net_backend = &s->nc;
options.opaque = s->chr;
- s->vhost_net = vhost_net_init(&options);
+ options.net_backend = s->pairs[i].nc;
+ vhost_net = s->pairs[i++].vhost_net = vhost_net_init(&options);
+
+ max_queues = vhost_net_get_max_queues(vhost_net);
+ if (s->queues > max_queues) {
+ error_report("you are asking more queues than supported: %d\n",
+ max_queues);
+ return -1;
+ }
+
+ for (; i < s->queues; i++) {
+ options.net_backend = s->pairs[i].nc;
+
+ s->pairs[i].vhost_net = vhost_net_init(&options);
+ if (!s->pairs[i].vhost_net) {
+ return -1;
+ }
+ }
+ s->running = true;
- return vhost_user_running(s) ? 0 : -1;
+ return 0;
}
static void vhost_user_stop(VhostUserState *s)
{
- if (vhost_user_running(s)) {
- vhost_net_cleanup(s->vhost_net);
+ int i;
+ VHostNetState *vhost_net;
+
+ if (!s->running) {
+ return;
}
- s->vhost_net = 0;
+ for (i = 0; i < s->queues; i++) {
+ vhost_net = s->pairs[i].vhost_net;
+ if (vhost_net) {
+ vhost_net_cleanup(vhost_net);
+ }
+ }
+
+ s->running = false;
}
static void vhost_user_cleanup(NetClientState *nc)
{
- VhostUserState *s = DO_UPCAST(VhostUserState, nc, nc);
+ VhostUserState *s = nc->opaque;
+ VHostNetState *vhost_net = s->pairs[nc->queue_index].vhost_net;
+
+ if (vhost_net) {
+ vhost_net_cleanup(vhost_net);
+ }
- vhost_user_stop(s);
qemu_purge_queued_packets(nc);
+
+ if (nc->queue_index == s->queues - 1) {
+ free(s);
+ }
}
static bool vhost_user_has_vnet_hdr(NetClientState *nc)
@@ -97,18 +136,25 @@ static NetClientInfo net_vhost_user_info = {
static void net_vhost_link_down(VhostUserState *s, bool link_down)
{
- s->nc.link_down = link_down;
+ NetClientState *nc;
+ int i;
- if (s->nc.peer) {
- s->nc.peer->link_down = link_down;
- }
+ for (i = 0; i < s->queues; i++) {
+ nc = s->pairs[i].nc;
- if (s->nc.info->link_status_changed) {
- s->nc.info->link_status_changed(&s->nc);
- }
+ nc->link_down = link_down;
+
+ if (nc->peer) {
+ nc->peer->link_down = link_down;
+ }
- if (s->nc.peer && s->nc.peer->info->link_status_changed) {
- s->nc.peer->info->link_status_changed(s->nc.peer);
+ if (nc->info->link_status_changed) {
+ nc->info->link_status_changed(nc);
+ }
+
+ if (nc->peer && nc->peer->info->link_status_changed) {
+ nc->peer->info->link_status_changed(nc->peer);
+ }
}
}
@@ -118,7 +164,9 @@ static void net_vhost_user_event(void *opaque, int event)
switch (event) {
case CHR_EVENT_OPENED:
- vhost_user_start(s);
+ if (vhost_user_start(s) < 0) {
+ exit(1);
+ }
net_vhost_link_down(s, false);
error_report("chardev \"%s\" went up", s->chr->label);
break;
@@ -131,23 +179,28 @@ static void net_vhost_user_event(void *opaque, int event)
}
static int net_vhost_user_init(NetClientState *peer, const char *device,
- const char *name, CharDriverState *chr)
+ const char *name, VhostUserState *s)
{
NetClientState *nc;
- VhostUserState *s;
+ CharDriverState *chr = s->chr;
+ int i;
- nc = qemu_new_net_client(&net_vhost_user_info, peer, device, name);
+ for (i = 0; i < s->queues; i++) {
+ nc = qemu_new_net_client(&net_vhost_user_info, peer, device, name);
- snprintf(nc->info_str, sizeof(nc->info_str), "vhost-user to %s",
- chr->label);
+ snprintf(nc->info_str, sizeof(nc->info_str), "vhost-user%d to %s",
+ i, chr->label);
- s = DO_UPCAST(VhostUserState, nc, nc);
+ /* We don't provide a receive callback */
+ nc->receive_disabled = 1;
- /* We don't provide a receive callback */
- s->nc.receive_disabled = 1;
- s->chr = chr;
+ nc->queue_index = i;
+ nc->opaque = s;
- qemu_chr_add_handlers(s->chr, NULL, NULL, net_vhost_user_event, s);
+ s->pairs[i].nc = nc;
+ }
+
+ qemu_chr_add_handlers(chr, NULL, NULL, net_vhost_user_event, s);
return 0;
}
@@ -226,8 +279,10 @@ static int net_vhost_check_net(void *opaque, QemuOpts *opts, Error **errp)
int net_init_vhost_user(const NetClientOptions *opts, const char *name,
NetClientState *peer, Error **errp)
{
+ int queues;
const NetdevVhostUserOptions *vhost_user_opts;
CharDriverState *chr;
+ VhostUserState *s;
assert(opts->kind == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
vhost_user_opts = opts->vhost_user;
@@ -243,6 +298,11 @@ int net_init_vhost_user(const NetClientOptions *opts, const char *name,
return -1;
}
+ queues = vhost_user_opts->has_queues ? vhost_user_opts->queues : 1;
+ s = g_malloc0(sizeof(VhostUserState) +
+ queues * sizeof(VhostUserNetPair));
+ s->queues = queues;
+ s->chr = chr;
- return net_vhost_user_init(peer, "vhost_user", name, chr);
+ return net_vhost_user_init(peer, "vhost_user", name, s);
}
diff --git a/qapi-schema.json b/qapi-schema.json
index 67fef37..55c33db 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -2480,12 +2480,16 @@
#
# @vhostforce: #optional vhost on for non-MSIX virtio guests (default: false).
#
+# @queues: #optional number of queues to be created for multiqueue vhost-user
+# (default: 1) (Since 2.5)
+#
# Since 2.1
##
{ 'struct': 'NetdevVhostUserOptions',
'data': {
'chardev': 'str',
- '*vhostforce': 'bool' } }
+ '*vhostforce': 'bool',
+ '*queues': 'int' } }
##
# @NetClientOptions
diff --git a/qemu-options.hx b/qemu-options.hx
index 77f5853..5bfa7a3 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1963,13 +1963,14 @@ The hubport netdev lets you connect a NIC to a QEMU "vlan" instead of a single
netdev. @code{-net} and @code{-device} with parameter @option{vlan} create the
required hub automatically.
-@item -netdev vhost-user,chardev=@var{id}[,vhostforce=on|off]
+@item -netdev vhost-user,chardev=@var{id}[,vhostforce=on|off][,queues=n]
Establish a vhost-user netdev, backed by a chardev @var{id}. The chardev should
be a unix domain socket backed one. The vhost-user uses a specifically defined
protocol to pass vhost ioctl replacement messages to an application on the other
end of the socket. On non-MSIX guests, the feature can be forced with
-@var{vhostforce}.
+@var{vhostforce}. Use 'queues=@var{n}' to specify the number of queues to
+be created for multiqueue vhost-user.
Example:
@example
--
1.9.0
^ permalink raw reply related [flat|nested] 27+ messages in thread
* [Qemu-devel] [PATCH 2/7] vhost-user: add protocol feature negotiation
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 1/7] vhost-user: use VHOST_USER_XXX macro for switch statement Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 1/2] vhost-user: add multiple queue support Yuanhan Liu
@ 2015-09-15 7:10 ` Yuanhan Liu
2015-09-17 7:12 ` Jason Wang
2015-09-15 7:10 ` [Qemu-devel] [PATCH 3/7] vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE Yuanhan Liu
` (7 subsequent siblings)
10 siblings, 1 reply; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-15 7:10 UTC (permalink / raw)
To: qemu-devel; +Cc: jasowang, changchun.ouyang, Yuanhan Liu, mst
From: "Michael S. Tsirkin" <mst@redhat.com>
Support a separate bitmask for vhost-user protocol features,
and messages to get/set protocol features.
Invoke them at init.
No features are defined yet.
v2: leverage vhost_user_call for request handling -- Yuanhan Liu
Signed-off-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
docs/specs/vhost-user.txt | 37 +++++++++++++++++++++++++++++++++++++
hw/net/vhost_net.c | 2 ++
hw/virtio/vhost-user.c | 31 +++++++++++++++++++++++++++++++
include/hw/virtio/vhost.h | 1 +
4 files changed, 71 insertions(+)
diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
index 650bb18..70da3b1 100644
--- a/docs/specs/vhost-user.txt
+++ b/docs/specs/vhost-user.txt
@@ -113,6 +113,7 @@ message replies. Most of the requests don't require replies. Here is a list of
the ones that do:
* VHOST_GET_FEATURES
+ * VHOST_GET_PROTOCOL_FEATURES
* VHOST_GET_VRING_BASE
There are several messages that the master sends with file descriptors passed
@@ -127,6 +128,13 @@ in the ancillary data:
If Master is unable to send the full message or receives a wrong reply it will
close the connection. An optional reconnection mechanism can be implemented.
+Any protocol extensions are gated by protocol feature bits,
+which allows full backwards compatibility on both master
+and slave.
+As older slaves don't support negotiating protocol features,
+a feature bit was dedicated for this purpose:
+#define VHOST_USER_F_PROTOCOL_FEATURES 30
+
Message types
-------------
@@ -138,6 +146,8 @@ Message types
Slave payload: u64
Get from the underlying vhost implementation the features bitmask.
+ Feature bit VHOST_USER_F_PROTOCOL_FEATURES signals slave support for
+ VHOST_USER_GET_PROTOCOL_FEATURES and VHOST_USER_SET_PROTOCOL_FEATURES.
* VHOST_USER_SET_FEATURES
@@ -146,6 +156,33 @@ Message types
Master payload: u64
Enable features in the underlying vhost implementation using a bitmask.
+ Feature bit VHOST_USER_F_PROTOCOL_FEATURES signals slave support for
+ VHOST_USER_GET_PROTOCOL_FEATURES and VHOST_USER_SET_PROTOCOL_FEATURES.
+
+ * VHOST_USER_GET_PROTOCOL_FEATURES
+
+ Id: 15
+ Equivalent ioctl: VHOST_GET_FEATURES
+ Master payload: N/A
+ Slave payload: u64
+
+ Get the protocol feature bitmask from the underlying vhost implementation.
+ Only legal if feature bit VHOST_USER_F_PROTOCOL_FEATURES is present in
+ VHOST_USER_GET_FEATURES.
+ Note: slave that reported VHOST_USER_F_PROTOCOL_FEATURES must support
+ this message even before VHOST_USER_SET_FEATURES was called.
+
+ * VHOST_USER_SET_PROTOCOL_FEATURES
+
+ Id: 16
+ Ioctl: VHOST_SET_FEATURES
+ Master payload: u64
+
+ Enable protocol features in the underlying vhost implementation.
+ Only legal if feature bit VHOST_USER_F_PROTOCOL_FEATURES is present in
+ VHOST_USER_GET_FEATURES.
+ Note: slave that reported VHOST_USER_F_PROTOCOL_FEATURES must support
+ this message even before VHOST_USER_SET_FEATURES was called.
* VHOST_USER_SET_OWNER
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index 5c1d11f..c864237 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -152,8 +152,10 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
net->dev.backend_features = qemu_has_vnet_hdr(options->net_backend)
? 0 : (1ULL << VHOST_NET_F_VIRTIO_NET_HDR);
net->backend = r;
+ net->dev.protocol_features = 0;
} else {
net->dev.backend_features = 0;
+ net->dev.protocol_features = 0;
net->backend = -1;
}
net->nc = options->net_backend;
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index 13677ac..43169a1 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -24,6 +24,8 @@
#include <linux/vhost.h>
#define VHOST_MEMORY_MAX_NREGIONS 8
+#define VHOST_USER_F_PROTOCOL_FEATURES 30
+#define VHOST_USER_PROTOCOL_FEATURE_MASK 0x0ULL
typedef enum VhostUserRequest {
VHOST_USER_NONE = 0,
@@ -41,6 +43,8 @@ typedef enum VhostUserRequest {
VHOST_USER_SET_VRING_KICK = 12,
VHOST_USER_SET_VRING_CALL = 13,
VHOST_USER_SET_VRING_ERR = 14,
+ VHOST_USER_GET_PROTOCOL_FEATURES = 15,
+ VHOST_USER_SET_PROTOCOL_FEATURES = 16,
VHOST_USER_MAX
} VhostUserRequest;
@@ -206,11 +210,13 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
switch (msg_request) {
case VHOST_USER_GET_FEATURES:
+ case VHOST_USER_GET_PROTOCOL_FEATURES:
need_reply = 1;
break;
case VHOST_USER_SET_FEATURES:
case VHOST_USER_SET_LOG_BASE:
+ case VHOST_USER_SET_PROTOCOL_FEATURES:
msg.u64 = *((__u64 *) arg);
msg.size = sizeof(m.u64);
break;
@@ -308,6 +314,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
switch (msg_request) {
case VHOST_USER_GET_FEATURES:
+ case VHOST_USER_GET_PROTOCOL_FEATURES:
if (msg.size != sizeof(m.u64)) {
error_report("Received bad msg size.");
return -1;
@@ -333,10 +340,34 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
static int vhost_user_init(struct vhost_dev *dev, void *opaque)
{
+ unsigned long long features;
+ int err;
+
assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER);
dev->opaque = opaque;
+ err = vhost_user_call(dev, VHOST_USER_GET_FEATURES, &features);
+ if (err < 0) {
+ return err;
+ }
+
+ if (__virtio_has_feature(features, VHOST_USER_F_PROTOCOL_FEATURES)) {
+ dev->backend_features |= 1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
+
+ err = vhost_user_call(dev, VHOST_USER_GET_PROTOCOL_FEATURES, &features);
+ if (err < 0) {
+ return err;
+ }
+
+ dev->protocol_features = features & VHOST_USER_PROTOCOL_FEATURE_MASK;
+ err = vhost_user_call(dev, VHOST_USER_SET_PROTOCOL_FEATURES,
+ &dev->protocol_features);
+ if (err < 0) {
+ return err;
+ }
+ }
+
return 0;
}
diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h
index dd51050..6467c73 100644
--- a/include/hw/virtio/vhost.h
+++ b/include/hw/virtio/vhost.h
@@ -47,6 +47,7 @@ struct vhost_dev {
unsigned long long features;
unsigned long long acked_features;
unsigned long long backend_features;
+ unsigned long long protocol_features;
bool started;
bool log_enabled;
unsigned long long log_size;
--
1.9.0
^ permalink raw reply related [flat|nested] 27+ messages in thread
* [Qemu-devel] [PATCH 3/7] vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
` (2 preceding siblings ...)
2015-09-15 7:10 ` [Qemu-devel] [PATCH 2/7] vhost-user: add protocol feature negotiation Yuanhan Liu
@ 2015-09-15 7:10 ` Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 4/7] vhost-user: add VHOST_USER_GET_QUEUE_NUM message Yuanhan Liu
` (6 subsequent siblings)
10 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-15 7:10 UTC (permalink / raw)
To: qemu-devel; +Cc: jasowang, changchun.ouyang, Yuanhan Liu, mst
Quote from Michael:
We really should rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE.
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
docs/specs/vhost-user.txt | 4 ++--
hw/net/vhost_net.c | 2 +-
hw/virtio/vhost-user.c | 6 +++---
| 2 +-
tests/vhost-user-test.c | 2 +-
5 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
index 70da3b1..ccbbcbb 100644
--- a/docs/specs/vhost-user.txt
+++ b/docs/specs/vhost-user.txt
@@ -194,10 +194,10 @@ Message types
as an owner of the session. This can be used on the Slave as a
"session start" flag.
- * VHOST_USER_RESET_OWNER
+ * VHOST_USER_RESET_DEVICE
Id: 4
- Equivalent ioctl: VHOST_RESET_OWNER
+ Equivalent ioctl: VHOST_RESET_DEVICE
Master payload: N/A
Issued when a new connection is about to be closed. The Master will no
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index c864237..33b0e97 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -287,7 +287,7 @@ static void vhost_net_stop_one(struct vhost_net *net,
} else if (net->nc->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER) {
for (file.index = 0; file.index < net->dev.nvqs; ++file.index) {
const VhostOps *vhost_ops = net->dev.vhost_ops;
- int r = vhost_ops->vhost_call(&net->dev, VHOST_RESET_OWNER,
+ int r = vhost_ops->vhost_call(&net->dev, VHOST_RESET_DEVICE,
NULL);
assert(r >= 0);
}
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index 43169a1..0ac8252 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -32,7 +32,7 @@ typedef enum VhostUserRequest {
VHOST_USER_GET_FEATURES = 1,
VHOST_USER_SET_FEATURES = 2,
VHOST_USER_SET_OWNER = 3,
- VHOST_USER_RESET_OWNER = 4,
+ VHOST_USER_RESET_DEVICE = 4,
VHOST_USER_SET_MEM_TABLE = 5,
VHOST_USER_SET_LOG_BASE = 6,
VHOST_USER_SET_LOG_FD = 7,
@@ -98,7 +98,7 @@ static unsigned long int ioctl_to_vhost_user_request[VHOST_USER_MAX] = {
VHOST_GET_FEATURES, /* VHOST_USER_GET_FEATURES */
VHOST_SET_FEATURES, /* VHOST_USER_SET_FEATURES */
VHOST_SET_OWNER, /* VHOST_USER_SET_OWNER */
- VHOST_RESET_OWNER, /* VHOST_USER_RESET_OWNER */
+ VHOST_RESET_DEVICE, /* VHOST_USER_RESET_DEVICE */
VHOST_SET_MEM_TABLE, /* VHOST_USER_SET_MEM_TABLE */
VHOST_SET_LOG_BASE, /* VHOST_USER_SET_LOG_BASE */
VHOST_SET_LOG_FD, /* VHOST_USER_SET_LOG_FD */
@@ -222,7 +222,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
break;
case VHOST_USER_SET_OWNER:
- case VHOST_USER_RESET_OWNER:
+ case VHOST_USER_RESET_DEVICE:
break;
case VHOST_USER_SET_MEM_TABLE:
--git a/linux-headers/linux/vhost.h b/linux-headers/linux/vhost.h
index ead86db..14a0160 100644
--- a/linux-headers/linux/vhost.h
+++ b/linux-headers/linux/vhost.h
@@ -78,7 +78,7 @@ struct vhost_memory {
#define VHOST_SET_OWNER _IO(VHOST_VIRTIO, 0x01)
/* Give up ownership, and reset the device to default values.
* Allows subsequent call to VHOST_OWNER_SET to succeed. */
-#define VHOST_RESET_OWNER _IO(VHOST_VIRTIO, 0x02)
+#define VHOST_RESET_DEVICE _IO(VHOST_VIRTIO, 0x02)
/* Set up/modify memory layout */
#define VHOST_SET_MEM_TABLE _IOW(VHOST_VIRTIO, 0x03, struct vhost_memory)
diff --git a/tests/vhost-user-test.c b/tests/vhost-user-test.c
index 75fedf0..e301db7 100644
--- a/tests/vhost-user-test.c
+++ b/tests/vhost-user-test.c
@@ -58,7 +58,7 @@ typedef enum VhostUserRequest {
VHOST_USER_GET_FEATURES = 1,
VHOST_USER_SET_FEATURES = 2,
VHOST_USER_SET_OWNER = 3,
- VHOST_USER_RESET_OWNER = 4,
+ VHOST_USER_RESET_DEVICE = 4,
VHOST_USER_SET_MEM_TABLE = 5,
VHOST_USER_SET_LOG_BASE = 6,
VHOST_USER_SET_LOG_FD = 7,
--
1.9.0
^ permalink raw reply related [flat|nested] 27+ messages in thread
* [Qemu-devel] [PATCH 4/7] vhost-user: add VHOST_USER_GET_QUEUE_NUM message
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
` (3 preceding siblings ...)
2015-09-15 7:10 ` [Qemu-devel] [PATCH 3/7] vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE Yuanhan Liu
@ 2015-09-15 7:10 ` Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 5/7] vhost: introduce vhost_backend_get_vq_index method Yuanhan Liu
` (5 subsequent siblings)
10 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-15 7:10 UTC (permalink / raw)
To: qemu-devel; +Cc: jasowang, changchun.ouyang, Yuanhan Liu, mst
This is for querying how many queues the backend supports if it has mq
support(when VHOST_USER_PROTOCOL_F_MQ flag is set from the quried
protocol features).
vhost_net_get_max_queues() is the interface to export that value, and
to tell if the backend supports # of queues user requested, which is
done in the following patch.
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
docs/specs/vhost-user.txt | 11 +++++++++++
hw/net/vhost_net.c | 7 +++++++
hw/virtio/vhost-user.c | 15 ++++++++++++++-
include/hw/virtio/vhost.h | 1 +
include/net/vhost_net.h | 1 +
5 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
index ccbbcbb..43db9b4 100644
--- a/docs/specs/vhost-user.txt
+++ b/docs/specs/vhost-user.txt
@@ -301,3 +301,14 @@ Message types
Bits (0-7) of the payload contain the vring index. Bit 8 is the
invalid FD flag. This flag is set when there is no file descriptor
in the ancillary data.
+
+ * VHOST_USER_GET_QUEUE_NUM
+
+ Id: 17
+ Equivalent ioctl: N/A
+ Master payload: N/A
+ Slave payload: u64
+
+ Query how many queues the backend supports. This request should be
+ sent only when VHOST_USER_PROTOCOL_F_MQ is set in quried protocol
+ features by VHOST_USER_GET_PROTOCOL_FEATURES.
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index 33b0e97..f9441e9 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -122,6 +122,11 @@ void vhost_net_ack_features(struct vhost_net *net, uint64_t features)
vhost_ack_features(&net->dev, vhost_net_get_feature_bits(net), features);
}
+uint64_t vhost_net_get_max_queues(VHostNetState *net)
+{
+ return net->dev.max_queues;
+}
+
static int vhost_net_get_fd(NetClientState *backend)
{
switch (backend->info->type) {
@@ -144,6 +149,8 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
goto fail;
}
+ net->dev.max_queues = 1;
+
if (backend_kernel) {
r = vhost_net_get_fd(options->net_backend);
if (r < 0) {
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index 0ac8252..8b4b36b 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -25,7 +25,9 @@
#define VHOST_MEMORY_MAX_NREGIONS 8
#define VHOST_USER_F_PROTOCOL_FEATURES 30
-#define VHOST_USER_PROTOCOL_FEATURE_MASK 0x0ULL
+#define VHOST_USER_PROTOCOL_FEATURE_MASK 0x1ULL
+
+#define VHOST_USER_PROTOCOL_F_MQ 0
typedef enum VhostUserRequest {
VHOST_USER_NONE = 0,
@@ -45,6 +47,7 @@ typedef enum VhostUserRequest {
VHOST_USER_SET_VRING_ERR = 14,
VHOST_USER_GET_PROTOCOL_FEATURES = 15,
VHOST_USER_SET_PROTOCOL_FEATURES = 16,
+ VHOST_USER_GET_QUEUE_NUM = 17,
VHOST_USER_MAX
} VhostUserRequest;
@@ -211,6 +214,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
switch (msg_request) {
case VHOST_USER_GET_FEATURES:
case VHOST_USER_GET_PROTOCOL_FEATURES:
+ case VHOST_USER_GET_QUEUE_NUM:
need_reply = 1;
break;
@@ -315,6 +319,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
switch (msg_request) {
case VHOST_USER_GET_FEATURES:
case VHOST_USER_GET_PROTOCOL_FEATURES:
+ case VHOST_USER_GET_QUEUE_NUM:
if (msg.size != sizeof(m.u64)) {
error_report("Received bad msg size.");
return -1;
@@ -366,6 +371,14 @@ static int vhost_user_init(struct vhost_dev *dev, void *opaque)
if (err < 0) {
return err;
}
+
+ /* query the max queues we support if backend supports Multiple Queue */
+ if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ)) {
+ err = vhost_user_call(dev, VHOST_USER_GET_QUEUE_NUM, &dev->max_queues);
+ if (err < 0) {
+ return err;
+ }
+ }
}
return 0;
diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h
index 6467c73..c3758f3 100644
--- a/include/hw/virtio/vhost.h
+++ b/include/hw/virtio/vhost.h
@@ -48,6 +48,7 @@ struct vhost_dev {
unsigned long long acked_features;
unsigned long long backend_features;
unsigned long long protocol_features;
+ unsigned long long max_queues;
bool started;
bool log_enabled;
unsigned long long log_size;
diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h
index 840d4b1..8db723e 100644
--- a/include/net/vhost_net.h
+++ b/include/net/vhost_net.h
@@ -13,6 +13,7 @@ typedef struct VhostNetOptions {
void *opaque;
} VhostNetOptions;
+uint64_t vhost_net_get_max_queues(VHostNetState *net);
struct vhost_net *vhost_net_init(VhostNetOptions *options);
int vhost_net_start(VirtIODevice *dev, NetClientState *ncs, int total_queues);
--
1.9.0
^ permalink raw reply related [flat|nested] 27+ messages in thread
* [Qemu-devel] [PATCH 5/7] vhost: introduce vhost_backend_get_vq_index method
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
` (4 preceding siblings ...)
2015-09-15 7:10 ` [Qemu-devel] [PATCH 4/7] vhost-user: add VHOST_USER_GET_QUEUE_NUM message Yuanhan Liu
@ 2015-09-15 7:10 ` Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support Yuanhan Liu
` (4 subsequent siblings)
10 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-15 7:10 UTC (permalink / raw)
To: qemu-devel; +Cc: jasowang, changchun.ouyang, Yuanhan Liu, mst
Minusing the idx with the base(dev->vq_index) for vhost-kernel, and
then adding it back for vhost-user doesn't seem right. Here introduces
a new method vhost_backend_get_vq_index() for getting the right vq
index for following vhost messages calls.
Suggested-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
hw/virtio/vhost-backend.c | 10 +++++++++-
hw/virtio/vhost-user.c | 12 ++++++++++--
hw/virtio/vhost.c | 15 ++++++---------
include/hw/virtio/vhost-backend.h | 2 ++
4 files changed, 27 insertions(+), 12 deletions(-)
diff --git a/hw/virtio/vhost-backend.c b/hw/virtio/vhost-backend.c
index 4d68a27..72d1392 100644
--- a/hw/virtio/vhost-backend.c
+++ b/hw/virtio/vhost-backend.c
@@ -42,11 +42,19 @@ static int vhost_kernel_cleanup(struct vhost_dev *dev)
return close(fd);
}
+static int vhost_kernel_get_vq_index(struct vhost_dev *dev, int idx)
+{
+ assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
+
+ return idx - dev->vq_index;
+}
+
static const VhostOps kernel_ops = {
.backend_type = VHOST_BACKEND_TYPE_KERNEL,
.vhost_call = vhost_kernel_call,
.vhost_backend_init = vhost_kernel_init,
- .vhost_backend_cleanup = vhost_kernel_cleanup
+ .vhost_backend_cleanup = vhost_kernel_cleanup,
+ .vhost_backend_get_vq_index = vhost_kernel_get_vq_index,
};
int vhost_set_backend_type(struct vhost_dev *dev, VhostBackendType backend_type)
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index 8b4b36b..69b085b 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -393,9 +393,17 @@ static int vhost_user_cleanup(struct vhost_dev *dev)
return 0;
}
+static int vhost_user_get_vq_index(struct vhost_dev *dev, int idx)
+{
+ assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
+
+ return idx;
+}
+
const VhostOps user_ops = {
.backend_type = VHOST_BACKEND_TYPE_USER,
.vhost_call = vhost_user_call,
.vhost_backend_init = vhost_user_init,
- .vhost_backend_cleanup = vhost_user_cleanup
- };
+ .vhost_backend_cleanup = vhost_user_cleanup,
+ .vhost_backend_get_vq_index = vhost_user_get_vq_index,
+};
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 2712c6f..717a0ba 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -719,7 +719,7 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
{
hwaddr s, l, a;
int r;
- int vhost_vq_index = idx - dev->vq_index;
+ int vhost_vq_index = dev->vhost_ops->vhost_backend_get_vq_index(dev, idx);
struct vhost_vring_file file = {
.index = vhost_vq_index
};
@@ -728,7 +728,6 @@ static int vhost_virtqueue_start(struct vhost_dev *dev,
};
struct VirtQueue *vvq = virtio_get_queue(vdev, idx);
- assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
vq->num = state.num = virtio_queue_get_num(vdev, idx);
r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_NUM, &state);
@@ -822,12 +821,12 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev,
struct vhost_virtqueue *vq,
unsigned idx)
{
- int vhost_vq_index = idx - dev->vq_index;
+ int vhost_vq_index = dev->vhost_ops->vhost_backend_get_vq_index(dev, idx);
struct vhost_vring_state state = {
.index = vhost_vq_index,
};
int r;
- assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
+
r = dev->vhost_ops->vhost_call(dev, VHOST_GET_VRING_BASE, &state);
if (r < 0) {
fprintf(stderr, "vhost VQ %d ring restore failed: %d\n", idx, r);
@@ -1066,17 +1065,15 @@ void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
{
struct VirtQueue *vvq = virtio_get_queue(vdev, n);
int r, index = n - hdev->vq_index;
+ struct vhost_vring_file file;
- assert(n >= hdev->vq_index && n < hdev->vq_index + hdev->nvqs);
-
- struct vhost_vring_file file = {
- .index = index
- };
if (mask) {
file.fd = event_notifier_get_fd(&hdev->vqs[index].masked_notifier);
} else {
file.fd = event_notifier_get_fd(virtio_queue_get_guest_notifier(vvq));
}
+
+ file.index = hdev->vhost_ops->vhost_backend_get_vq_index(hdev, n);
r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_VRING_CALL, &file);
assert(r >= 0);
}
diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-backend.h
index e472f29..e1dfc6d 100644
--- a/include/hw/virtio/vhost-backend.h
+++ b/include/hw/virtio/vhost-backend.h
@@ -24,12 +24,14 @@ typedef int (*vhost_call)(struct vhost_dev *dev, unsigned long int request,
void *arg);
typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque);
typedef int (*vhost_backend_cleanup)(struct vhost_dev *dev);
+typedef int (*vhost_backend_get_vq_index)(struct vhost_dev *dev, int idx);
typedef struct VhostOps {
VhostBackendType backend_type;
vhost_call vhost_call;
vhost_backend_init vhost_backend_init;
vhost_backend_cleanup vhost_backend_cleanup;
+ vhost_backend_get_vq_index vhost_backend_get_vq_index;
} VhostOps;
extern const VhostOps user_ops;
--
1.9.0
^ permalink raw reply related [flat|nested] 27+ messages in thread
* [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
` (5 preceding siblings ...)
2015-09-15 7:10 ` [Qemu-devel] [PATCH 5/7] vhost: introduce vhost_backend_get_vq_index method Yuanhan Liu
@ 2015-09-15 7:10 ` Yuanhan Liu
2015-09-15 15:02 ` Eric Blake
2015-09-15 7:10 ` [Qemu-devel] [PATCH 7/7] vhost-user: add a new message to disable/enable a specific virt queue Yuanhan Liu
` (3 subsequent siblings)
10 siblings, 1 reply; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-15 7:10 UTC (permalink / raw)
To: qemu-devel; +Cc: jasowang, changchun.ouyang, Yuanhan Liu, mst
From: Changchun Ouyang <changchun.ouyang@intel.com>
This patch is initially based a patch from Nikolay Nikolaev.
Here is the latest version for adding vhost-user multiple queue support,
by creating a nc and vhost_net pair for each queue.
Qemu exits if find that the backend can't support number of requested
queues(by providing queues=# option). The max number is queried by a
new message, VHOST_USER_GET_QUEUE_NUM, and is sent only when protocol
feature VHOST_USER_PROTOCOL_F_MQ is present first.
The max queue check is done at vhost-user initiation stage. We initiate
one queue first, which, in the meantime, also gets the max_queues the
backend supports.
In older version, it was reported that some messages are sent more times
than necessary. Here we came an agreement with Michael that we could
categorize vhost user messages to 2 types: none-vring specific messages,
which should be sent only once, and vring specific messages, which should
be sent per queue.
Here I introduced a helper function vhost_user_one_time_request(), which
lists following messages as none-vring specific messages:
VHOST_USER_GET_FEATURES
VHOST_USER_SET_FEATURES
VHOST_USER_GET_PROTOCOL_FEATURES
VHOST_USER_SET_PROTOCOL_FEATURES
VHOST_USER_SET_OWNER
VHOST_USER_RESET_DEVICE
VHOST_USER_SET_MEM_TABLE
VHOST_USER_GET_QUEUE_NUM
For above messages, we simply ignore them when they are not sent the first
time.
v9: per suggested by Jason Wang, we could invoke qemu_chr_add_handlers()
once only, and invoke qemu_find_net_clients_except() at the handler
to gather all related ncs, for initiating all queues. Which addresses
a hidden bug in older verion in a more QEMU-like way.
v8: set net->dev.vq_index correctly inside vhost_net_init() based on the
value from net->nc->queue_index.
Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
docs/specs/vhost-user.txt | 13 +++++
hw/net/vhost_net.c | 10 ++--
hw/virtio/vhost-user.c | 26 +++++++++
hw/virtio/vhost.c | 5 +-
net/vhost-user.c | 146 +++++++++++++++++++++++++++++++++-------------
qapi-schema.json | 6 +-
qemu-options.hx | 5 +-
7 files changed, 161 insertions(+), 50 deletions(-)
diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
index 43db9b4..acf5708 100644
--- a/docs/specs/vhost-user.txt
+++ b/docs/specs/vhost-user.txt
@@ -135,6 +135,19 @@ As older slaves don't support negotiating protocol features,
a feature bit was dedicated for this purpose:
#define VHOST_USER_F_PROTOCOL_FEATURES 30
+Multiple queue support
+-------------------
+Multiple queue is treated as a protocol extension, hence the slave has to
+implement protocol features first. Multiple queues is supported only when
+the protocol feature VHOST_USER_PROTOCOL_F_MQ(bit 0) is set.
+
+The max number of queues the slave supports can be queried with message
+VHOST_USER_GET_PROTOCOL_FEATURES. Master should stop when the number of
+requested queues is bigger than that.
+
+As all queues share one connection, the master uses a unique index for each
+queue in the sent message to identify a specified queue.
+
Message types
-------------
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index f9441e9..c114304 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -148,8 +148,11 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
fprintf(stderr, "vhost-net requires net backend to be setup\n");
goto fail;
}
+ net->nc = options->net_backend;
net->dev.max_queues = 1;
+ net->dev.nvqs = 2;
+ net->dev.vqs = net->vqs;
if (backend_kernel) {
r = vhost_net_get_fd(options->net_backend);
@@ -164,11 +167,10 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
net->dev.backend_features = 0;
net->dev.protocol_features = 0;
net->backend = -1;
- }
- net->nc = options->net_backend;
- net->dev.nvqs = 2;
- net->dev.vqs = net->vqs;
+ /* vhost-user needs vq_index to initiate a specific queue pair */
+ net->dev.vq_index = net->nc->queue_index * net->dev.nvqs;
+ }
r = vhost_dev_init(&net->dev, options->opaque,
options->backend_type);
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index 69b085b..dfb5a61 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -187,6 +187,23 @@ static int vhost_user_write(struct vhost_dev *dev, VhostUserMsg *msg,
0 : -1;
}
+static bool vhost_user_one_time_request(VhostUserRequest request)
+{
+ switch (request) {
+ case VHOST_USER_GET_FEATURES:
+ case VHOST_USER_SET_FEATURES:
+ case VHOST_USER_GET_PROTOCOL_FEATURES:
+ case VHOST_USER_SET_PROTOCOL_FEATURES:
+ case VHOST_USER_SET_OWNER:
+ case VHOST_USER_RESET_DEVICE:
+ case VHOST_USER_SET_MEM_TABLE:
+ case VHOST_USER_GET_QUEUE_NUM:
+ return true;
+ default:
+ return false;
+ }
+}
+
static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
void *arg)
{
@@ -207,6 +224,15 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
msg_request = request;
}
+ /*
+ * For none-vring specific requests, like VHOST_USER_GET_FEATURES,
+ * we just need send it once in the first time. For later such
+ * request, we just ignore it.
+ */
+ if (vhost_user_one_time_request(msg_request) && dev->vq_index != 0) {
+ return 0;
+ }
+
msg.request = msg_request;
msg.flags = VHOST_USER_VERSION;
msg.size = 0;
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 717a0ba..14518d0 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -874,8 +874,9 @@ static void vhost_eventfd_del(MemoryListener *listener,
static int vhost_virtqueue_init(struct vhost_dev *dev,
struct vhost_virtqueue *vq, int n)
{
+ int vhost_vq_index = dev->vhost_ops->vhost_backend_get_vq_index(dev, n);
struct vhost_vring_file file = {
- .index = n,
+ .index = vhost_vq_index,
};
int r = event_notifier_init(&vq->masked_notifier, 0);
if (r < 0) {
@@ -926,7 +927,7 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
}
for (i = 0; i < hdev->nvqs; ++i) {
- r = vhost_virtqueue_init(hdev, hdev->vqs + i, i);
+ r = vhost_virtqueue_init(hdev, hdev->vqs + i, hdev->vq_index + i);
if (r < 0) {
goto fail_vq;
}
diff --git a/net/vhost-user.c b/net/vhost-user.c
index 93dcecd..4fa3d64 100644
--- a/net/vhost-user.c
+++ b/net/vhost-user.c
@@ -39,37 +39,77 @@ static int vhost_user_running(VhostUserState *s)
return (s->vhost_net) ? 1 : 0;
}
-static int vhost_user_start(VhostUserState *s)
+static void vhost_user_stop(int queues, NetClientState *ncs[])
{
- VhostNetOptions options;
-
- if (vhost_user_running(s)) {
- return 0;
- }
+ VhostUserState *s;
+ int i;
- options.backend_type = VHOST_BACKEND_TYPE_USER;
- options.net_backend = &s->nc;
- options.opaque = s->chr;
+ for (i = 0; i < queues; i++) {
+ assert (ncs[i]->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
- s->vhost_net = vhost_net_init(&options);
+ s = DO_UPCAST(VhostUserState, nc, ncs[i]);
+ if (!vhost_user_running(s)) {
+ continue;
+ }
- return vhost_user_running(s) ? 0 : -1;
+ if (s->vhost_net) {
+ vhost_net_cleanup(s->vhost_net);
+ s->vhost_net = NULL;
+ }
+ }
}
-static void vhost_user_stop(VhostUserState *s)
+static int vhost_user_start(int queues, NetClientState *ncs[])
{
- if (vhost_user_running(s)) {
- vhost_net_cleanup(s->vhost_net);
+ VhostNetOptions options;
+ VhostUserState *s;
+ int max_queues;
+ int i;
+
+ options.backend_type = VHOST_BACKEND_TYPE_USER;
+
+ for (i = 0; i < queues; i++) {
+ assert (ncs[i]->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER);
+
+ s = DO_UPCAST(VhostUserState, nc, ncs[i]);
+ if (vhost_user_running(s)) {
+ continue;
+ }
+
+ options.net_backend = ncs[i];
+ options.opaque = s->chr;
+ s->vhost_net = vhost_net_init(&options);
+ if (!s->vhost_net) {
+ error_report("failed to init vhost_net for queue %d\n", i);
+ goto err;
+ }
+
+ if (i == 0) {
+ max_queues = vhost_net_get_max_queues(s->vhost_net);
+ if (queues > max_queues) {
+ error_report("you are asking more queues than "
+ "supported: %d\n", max_queues);
+ goto err;
+ }
+ }
}
- s->vhost_net = 0;
+ return 0;
+
+err:
+ vhost_user_stop(i + 1, ncs);
+ return -1;
}
static void vhost_user_cleanup(NetClientState *nc)
{
VhostUserState *s = DO_UPCAST(VhostUserState, nc, nc);
- vhost_user_stop(s);
+ if (s->vhost_net) {
+ vhost_net_cleanup(s->vhost_net);
+ s->vhost_net = NULL;
+ }
+
qemu_purge_queued_packets(nc);
}
@@ -95,59 +135,81 @@ static NetClientInfo net_vhost_user_info = {
.has_ufo = vhost_user_has_ufo,
};
-static void net_vhost_link_down(VhostUserState *s, bool link_down)
+static void net_vhost_link_down(int queues, NetClientState *ncs[],
+ bool link_down)
{
- s->nc.link_down = link_down;
+ NetClientState *nc;
+ int i;
- if (s->nc.peer) {
- s->nc.peer->link_down = link_down;
- }
+ for (i = 0; i < queues; i++) {
+ nc = ncs[i];
- if (s->nc.info->link_status_changed) {
- s->nc.info->link_status_changed(&s->nc);
- }
+ nc->link_down = link_down;
+
+ if (nc->peer) {
+ nc->peer->link_down = link_down;
+ }
+
+ if (nc->info->link_status_changed) {
+ nc->info->link_status_changed(nc);
+ }
- if (s->nc.peer && s->nc.peer->info->link_status_changed) {
- s->nc.peer->info->link_status_changed(s->nc.peer);
+ if (nc->peer && nc->peer->info->link_status_changed) {
+ nc->peer->info->link_status_changed(nc->peer);
+ }
}
}
static void net_vhost_user_event(void *opaque, int event)
{
- VhostUserState *s = opaque;
+ const char *name = opaque;
+ NetClientState *ncs[MAX_QUEUE_NUM];
+ VhostUserState *s;
+ int queues;
+ queues = qemu_find_net_clients_except(name, ncs,
+ NET_CLIENT_OPTIONS_KIND_NIC,
+ MAX_QUEUE_NUM);
+ s = DO_UPCAST(VhostUserState, nc, ncs[0]);
switch (event) {
case CHR_EVENT_OPENED:
- vhost_user_start(s);
- net_vhost_link_down(s, false);
+ if (vhost_user_start(queues, ncs) < 0) {
+ exit(1);
+ }
+ net_vhost_link_down(queues, ncs, false);
error_report("chardev \"%s\" went up", s->chr->label);
break;
case CHR_EVENT_CLOSED:
- net_vhost_link_down(s, true);
- vhost_user_stop(s);
+ net_vhost_link_down(queues, ncs, true);
+ vhost_user_stop(queues, ncs);
error_report("chardev \"%s\" went down", s->chr->label);
break;
}
}
static int net_vhost_user_init(NetClientState *peer, const char *device,
- const char *name, CharDriverState *chr)
+ const char *name, CharDriverState *chr,
+ int queues)
{
NetClientState *nc;
VhostUserState *s;
+ int i;
- nc = qemu_new_net_client(&net_vhost_user_info, peer, device, name);
+ 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 to %s",
- chr->label);
+ snprintf(nc->info_str, sizeof(nc->info_str), "vhost-user%d to %s",
+ i, chr->label);
- s = DO_UPCAST(VhostUserState, nc, nc);
+ /* We don't provide a receive callback */
+ nc->receive_disabled = 1;
+ nc->queue_index = i;
- /* We don't provide a receive callback */
- s->nc.receive_disabled = 1;
- s->chr = chr;
+ s = DO_UPCAST(VhostUserState, nc, nc);
+ s->chr = chr;
+ }
- qemu_chr_add_handlers(s->chr, NULL, NULL, net_vhost_user_event, s);
+ qemu_chr_add_handlers(chr, NULL, NULL, net_vhost_user_event, (void*)name);
return 0;
}
@@ -226,6 +288,7 @@ static int net_vhost_check_net(void *opaque, QemuOpts *opts, Error **errp)
int net_init_vhost_user(const NetClientOptions *opts, const char *name,
NetClientState *peer, Error **errp)
{
+ int queues;
const NetdevVhostUserOptions *vhost_user_opts;
CharDriverState *chr;
@@ -243,6 +306,7 @@ int net_init_vhost_user(const NetClientOptions *opts, const char *name,
return -1;
}
+ queues = vhost_user_opts->has_queues ? vhost_user_opts->queues : 1;
- return net_vhost_user_init(peer, "vhost_user", name, chr);
+ return net_vhost_user_init(peer, "vhost_user", name, chr, queues);
}
diff --git a/qapi-schema.json b/qapi-schema.json
index 67fef37..55c33db 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -2480,12 +2480,16 @@
#
# @vhostforce: #optional vhost on for non-MSIX virtio guests (default: false).
#
+# @queues: #optional number of queues to be created for multiqueue vhost-user
+# (default: 1) (Since 2.5)
+#
# Since 2.1
##
{ 'struct': 'NetdevVhostUserOptions',
'data': {
'chardev': 'str',
- '*vhostforce': 'bool' } }
+ '*vhostforce': 'bool',
+ '*queues': 'int' } }
##
# @NetClientOptions
diff --git a/qemu-options.hx b/qemu-options.hx
index 77f5853..5bfa7a3 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1963,13 +1963,14 @@ The hubport netdev lets you connect a NIC to a QEMU "vlan" instead of a single
netdev. @code{-net} and @code{-device} with parameter @option{vlan} create the
required hub automatically.
-@item -netdev vhost-user,chardev=@var{id}[,vhostforce=on|off]
+@item -netdev vhost-user,chardev=@var{id}[,vhostforce=on|off][,queues=n]
Establish a vhost-user netdev, backed by a chardev @var{id}. The chardev should
be a unix domain socket backed one. The vhost-user uses a specifically defined
protocol to pass vhost ioctl replacement messages to an application on the other
end of the socket. On non-MSIX guests, the feature can be forced with
-@var{vhostforce}.
+@var{vhostforce}. Use 'queues=@var{n}' to specify the number of queues to
+be created for multiqueue vhost-user.
Example:
@example
--
1.9.0
^ permalink raw reply related [flat|nested] 27+ messages in thread
* [Qemu-devel] [PATCH 7/7] vhost-user: add a new message to disable/enable a specific virt queue.
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
` (6 preceding siblings ...)
2015-09-15 7:10 ` [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support Yuanhan Liu
@ 2015-09-15 7:10 ` Yuanhan Liu
2015-09-16 8:12 ` [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Michael S. Tsirkin
` (2 subsequent siblings)
10 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-15 7:10 UTC (permalink / raw)
To: qemu-devel; +Cc: jasowang, changchun.ouyang, Yuanhan Liu, mst
From: Changchun Ouyang <changchun.ouyang@intel.com>
Add a new message, VHOST_USER_SET_VRING_ENABLE, to enable or disable
a specific virt queue, which is similar to attach/detach queue for
tap device.
virtio driver on guest doesn't have to use max virt queue pair, it
could enable any number of virt queue ranging from 1 to max virt
queue pair.
Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
docs/specs/vhost-user.txt | 12 +++++++++++-
hw/net/vhost_net.c | 18 ++++++++++++++++++
hw/net/virtio-net.c | 8 ++++++++
hw/virtio/vhost-user.c | 19 +++++++++++++++++++
include/hw/virtio/vhost-backend.h | 2 ++
include/net/vhost_net.h | 2 ++
6 files changed, 60 insertions(+), 1 deletion(-)
diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
index acf5708..9c12875 100644
--- a/docs/specs/vhost-user.txt
+++ b/docs/specs/vhost-user.txt
@@ -146,7 +146,9 @@ VHOST_USER_GET_PROTOCOL_FEATURES. Master should stop when the number of
requested queues is bigger than that.
As all queues share one connection, the master uses a unique index for each
-queue in the sent message to identify a specified queue.
+queue in the sent message to identify a specified queue. One queue pairs
+is enabled initially. More queues are enabled dynamically, by sending
+message VHOST_USER_SET_VRING_ENABLE.
Message types
-------------
@@ -325,3 +327,11 @@ Message types
Query how many queues the backend supports. This request should be
sent only when VHOST_USER_PROTOCOL_F_MQ is set in quried protocol
features by VHOST_USER_GET_PROTOCOL_FEATURES.
+
+ * VHOST_USER_SET_VRING_ENABLE
+
+ Id: 18
+ Equivalent ioctl: N/A
+ Master payload: vring state description
+
+ Signal slave to enable or disable corresponding vring.
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index c114304..b9266d7 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -422,6 +422,19 @@ VHostNetState *get_vhost_net(NetClientState *nc)
return vhost_net;
}
+
+int vhost_set_vring_enable(NetClientState *nc, int enable)
+{
+ VHostNetState *net = get_vhost_net(nc);
+ const VhostOps *vhost_ops = net->dev.vhost_ops;
+
+ if (vhost_ops->vhost_backend_set_vring_enable) {
+ return vhost_ops->vhost_backend_set_vring_enable(&net->dev, enable);
+ }
+
+ return 0;
+}
+
#else
struct vhost_net *vhost_net_init(VhostNetOptions *options)
{
@@ -467,4 +480,9 @@ VHostNetState *get_vhost_net(NetClientState *nc)
{
return 0;
}
+
+int vhost_set_vring_enable(NetClientState *nc, int enable)
+{
+ return 0;
+}
#endif
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 8d28e45..3d41e22 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -406,6 +406,10 @@ static int peer_attach(VirtIONet *n, int index)
return 0;
}
+ if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER) {
+ vhost_set_vring_enable(nc->peer, 1);
+ }
+
if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
return 0;
}
@@ -421,6 +425,10 @@ static int peer_detach(VirtIONet *n, int index)
return 0;
}
+ if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_VHOST_USER) {
+ vhost_set_vring_enable(nc->peer, 0);
+ }
+
if (nc->peer->info->type != NET_CLIENT_OPTIONS_KIND_TAP) {
return 0;
}
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index dfb5a61..d525ab5 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -48,6 +48,7 @@ typedef enum VhostUserRequest {
VHOST_USER_GET_PROTOCOL_FEATURES = 15,
VHOST_USER_SET_PROTOCOL_FEATURES = 16,
VHOST_USER_GET_QUEUE_NUM = 17,
+ VHOST_USER_SET_VRING_ENABLE = 18,
VHOST_USER_MAX
} VhostUserRequest;
@@ -294,6 +295,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
case VHOST_USER_SET_VRING_NUM:
case VHOST_USER_SET_VRING_BASE:
+ case VHOST_USER_SET_VRING_ENABLE:
memcpy(&msg.state, arg, sizeof(struct vhost_vring_state));
msg.size = sizeof(m.state);
break;
@@ -410,6 +412,22 @@ static int vhost_user_init(struct vhost_dev *dev, void *opaque)
return 0;
}
+static int vhost_user_set_vring_enable(struct vhost_dev *dev, int enable)
+{
+ struct vhost_vring_state state = {
+ .index = dev->vq_index,
+ .num = enable,
+ };
+
+ assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER);
+
+ if (!(dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ))) {
+ return -1;
+ }
+
+ return vhost_user_call(dev, VHOST_USER_SET_VRING_ENABLE, &state);
+}
+
static int vhost_user_cleanup(struct vhost_dev *dev)
{
assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER);
@@ -432,4 +450,5 @@ const VhostOps user_ops = {
.vhost_backend_init = vhost_user_init,
.vhost_backend_cleanup = vhost_user_cleanup,
.vhost_backend_get_vq_index = vhost_user_get_vq_index,
+ .vhost_backend_set_vring_enable = vhost_user_set_vring_enable,
};
diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-backend.h
index e1dfc6d..3a0f6e2 100644
--- a/include/hw/virtio/vhost-backend.h
+++ b/include/hw/virtio/vhost-backend.h
@@ -25,6 +25,7 @@ typedef int (*vhost_call)(struct vhost_dev *dev, unsigned long int request,
typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque);
typedef int (*vhost_backend_cleanup)(struct vhost_dev *dev);
typedef int (*vhost_backend_get_vq_index)(struct vhost_dev *dev, int idx);
+typedef int (*vhost_backend_set_vring_enable)(struct vhost_dev *dev, int enable);
typedef struct VhostOps {
VhostBackendType backend_type;
@@ -32,6 +33,7 @@ typedef struct VhostOps {
vhost_backend_init vhost_backend_init;
vhost_backend_cleanup vhost_backend_cleanup;
vhost_backend_get_vq_index vhost_backend_get_vq_index;
+ vhost_backend_set_vring_enable vhost_backend_set_vring_enable;
} VhostOps;
extern const VhostOps user_ops;
diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h
index 8db723e..0188c4d 100644
--- a/include/net/vhost_net.h
+++ b/include/net/vhost_net.h
@@ -28,4 +28,6 @@ bool vhost_net_virtqueue_pending(VHostNetState *net, int n);
void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
int idx, bool mask);
VHostNetState *get_vhost_net(NetClientState *nc);
+
+int vhost_set_vring_enable(NetClientState * nc, int enable);
#endif
--
1.9.0
^ permalink raw reply related [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 1/2] vhost-user: add multiple queue support
2015-09-15 7:10 ` [Qemu-devel] [PATCH 1/2] vhost-user: add multiple queue support Yuanhan Liu
@ 2015-09-15 14:56 ` Eric Blake
2015-09-16 2:07 ` Yuanhan Liu
0 siblings, 1 reply; 27+ messages in thread
From: Eric Blake @ 2015-09-15 14:56 UTC (permalink / raw)
To: Yuanhan Liu, qemu-devel; +Cc: jasowang, mst, changchun.ouyang
[-- Attachment #1: Type: text/plain, Size: 524 bytes --]
On 09/15/2015 01:10 AM, Yuanhan Liu wrote:
> From: Changchun Ouyang <changchun.ouyang@intel.com>
>
> This patch is initially based a patch from Nikolay Nikolaev.
Subject line confusion - this is titled 1/2, but in reply to a cover
letter titled 0/7, and where there is also a 1/7 patch, and where the
6/7 looks similar to this mail. I'll review that one instead, assuming
this one is a sending glitch.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 604 bytes --]
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support
2015-09-15 7:10 ` [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support Yuanhan Liu
@ 2015-09-15 15:02 ` Eric Blake
2015-09-16 2:06 ` Yuanhan Liu
0 siblings, 1 reply; 27+ messages in thread
From: Eric Blake @ 2015-09-15 15:02 UTC (permalink / raw)
To: Yuanhan Liu, qemu-devel; +Cc: jasowang, mst, changchun.ouyang
[-- Attachment #1: Type: text/plain, Size: 5598 bytes --]
On 09/15/2015 01:10 AM, Yuanhan Liu wrote:
> From: Changchun Ouyang <changchun.ouyang@intel.com>
>
> This patch is initially based a patch from Nikolay Nikolaev.
>
> Here is the latest version for adding vhost-user multiple queue support,
> by creating a nc and vhost_net pair for each queue.
The phrase "Here is the latest version" doesn't make much sense in the
long term in git (that is, a year from now, we won't care how many
preliminary versions there were, just about the version that got
committed; and if anything in git changes after that point, it is no
longer the latest version).
>
> Qemu exits if find that the backend can't support number of requested
> queues(by providing queues=# option). The max number is queried by a
space before ( in English.
> new message, VHOST_USER_GET_QUEUE_NUM, and is sent only when protocol
> feature VHOST_USER_PROTOCOL_F_MQ is present first.
>
> The max queue check is done at vhost-user initiation stage. We initiate
> one queue first, which, in the meantime, also gets the max_queues the
> backend supports.
>
> In older version, it was reported that some messages are sent more times
> than necessary. Here we came an agreement with Michael that we could
> categorize vhost user messages to 2 types: none-vring specific messages,
s/none/non/
> which should be sent only once, and vring specific messages, which should
> be sent per queue.
>
> Here I introduced a helper function vhost_user_one_time_request(), which
> lists following messages as none-vring specific messages:
s/none/non/
>
> VHOST_USER_GET_FEATURES
> VHOST_USER_SET_FEATURES
> VHOST_USER_GET_PROTOCOL_FEATURES
> VHOST_USER_SET_PROTOCOL_FEATURES
> VHOST_USER_SET_OWNER
> VHOST_USER_RESET_DEVICE
> VHOST_USER_SET_MEM_TABLE
> VHOST_USER_GET_QUEUE_NUM
>
> For above messages, we simply ignore them when they are not sent the first
> time.
>
Up to here is mostly fine for the commit message. Meanwhile...
> v9: per suggested by Jason Wang, we could invoke qemu_chr_add_handlers()
> once only, and invoke qemu_find_net_clients_except() at the handler
> to gather all related ncs, for initiating all queues. Which addresses
> a hidden bug in older verion in a more QEMU-like way.
>
> v8: set net->dev.vq_index correctly inside vhost_net_init() based on the
> value from net->nc->queue_index.
...this chunk here is useful only on the mailing list, and not in git,
and therefore, should appear...
>
> Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
> Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> ---
...here, after the --- separator.
> docs/specs/vhost-user.txt | 13 +++++
> hw/net/vhost_net.c | 10 ++--
> hw/virtio/vhost-user.c | 26 +++++++++
> hw/virtio/vhost.c | 5 +-
> net/vhost-user.c | 146 +++++++++++++++++++++++++++++++++-------------
> qapi-schema.json | 6 +-
> qemu-options.hx | 5 +-
> 7 files changed, 161 insertions(+), 50 deletions(-)
>
> diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
> index 43db9b4..acf5708 100644
> --- a/docs/specs/vhost-user.txt
> +++ b/docs/specs/vhost-user.txt
> @@ -135,6 +135,19 @@ As older slaves don't support negotiating protocol features,
> a feature bit was dedicated for this purpose:
> #define VHOST_USER_F_PROTOCOL_FEATURES 30
>
> +Multiple queue support
> +-------------------
Nit: the ---- line looks better when it is as long as the text it is
highlighting (3 bytes more)
> +Multiple queue is treated as a protocol extension, hence the slave has to
> +implement protocol features first. Multiple queues is supported only when
Sounds awkward. Either "Multiple queues are supported" or "The multiple
queues feature is supported"
> +the protocol feature VHOST_USER_PROTOCOL_F_MQ(bit 0) is set.
space before ( in English.
> +
> +The max number of queues the slave supports can be queried with message
> +VHOST_USER_GET_PROTOCOL_FEATURES. Master should stop when the number of
> +requested queues is bigger than that.
> +
> +As all queues share one connection, the master uses a unique index for each
> +queue in the sent message to identify a specified queue.
> +
> Message types
> -------------
>
> @@ -207,6 +224,15 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
> msg_request = request;
> }
>
> + /*
> + * For none-vring specific requests, like VHOST_USER_GET_FEATURES,
s/none/non/
> + * we just need send it once in the first time. For later such
> + * request, we just ignore it.
> + */
> + if (vhost_user_one_time_request(msg_request) && dev->vq_index != 0) {
> + return 0;
> + }
> +++ b/qapi-schema.json
> @@ -2480,12 +2480,16 @@
> #
> # @vhostforce: #optional vhost on for non-MSIX virtio guests (default: false).
> #
> +# @queues: #optional number of queues to be created for multiqueue vhost-user
> +# (default: 1) (Since 2.5)
> +#
> # Since 2.1
> ##
> { 'struct': 'NetdevVhostUserOptions',
> 'data': {
> 'chardev': 'str',
> - '*vhostforce': 'bool' } }
> + '*vhostforce': 'bool',
> + '*queues': 'int' } }
Interface looks okay.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 604 bytes --]
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support
2015-09-15 15:02 ` Eric Blake
@ 2015-09-16 2:06 ` Yuanhan Liu
2015-09-16 2:48 ` Yuanhan Liu
` (2 more replies)
0 siblings, 3 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-16 2:06 UTC (permalink / raw)
To: Eric Blake; +Cc: jasowang, mst, qemu-devel, changchun.ouyang
On Tue, Sep 15, 2015 at 09:02:07AM -0600, Eric Blake wrote:
> On 09/15/2015 01:10 AM, Yuanhan Liu wrote:
> > From: Changchun Ouyang <changchun.ouyang@intel.com>
> >
> > This patch is initially based a patch from Nikolay Nikolaev.
> >
> > Here is the latest version for adding vhost-user multiple queue support,
> > by creating a nc and vhost_net pair for each queue.
>
> The phrase "Here is the latest version" doesn't make much sense in the
> long term in git (that is, a year from now, we won't care how many
> preliminary versions there were, just about the version that got
> committed; and if anything in git changes after that point, it is no
> longer the latest version).
Yeah, good point.
>
> >
> > Qemu exits if find that the backend can't support number of requested
> > queues(by providing queues=# option). The max number is queried by a
>
> space before ( in English.
Michael reminded me behore, and sorry for making such mistake again.
And thanks for other typo corrections.
>
> > new message, VHOST_USER_GET_QUEUE_NUM, and is sent only when protocol
> > feature VHOST_USER_PROTOCOL_F_MQ is present first.
> >
> > The max queue check is done at vhost-user initiation stage. We initiate
> > one queue first, which, in the meantime, also gets the max_queues the
> > backend supports.
> >
> > In older version, it was reported that some messages are sent more times
> > than necessary. Here we came an agreement with Michael that we could
> > categorize vhost user messages to 2 types: none-vring specific messages,
>
> s/none/non/
>
> > which should be sent only once, and vring specific messages, which should
> > be sent per queue.
> >
> > Here I introduced a helper function vhost_user_one_time_request(), which
> > lists following messages as none-vring specific messages:
>
> s/none/non/
>
> >
> > VHOST_USER_GET_FEATURES
> > VHOST_USER_SET_FEATURES
> > VHOST_USER_GET_PROTOCOL_FEATURES
> > VHOST_USER_SET_PROTOCOL_FEATURES
> > VHOST_USER_SET_OWNER
> > VHOST_USER_RESET_DEVICE
> > VHOST_USER_SET_MEM_TABLE
> > VHOST_USER_GET_QUEUE_NUM
> >
> > For above messages, we simply ignore them when they are not sent the first
> > time.
> >
>
> Up to here is mostly fine for the commit message. Meanwhile...
>
> > v9: per suggested by Jason Wang, we could invoke qemu_chr_add_handlers()
> > once only, and invoke qemu_find_net_clients_except() at the handler
> > to gather all related ncs, for initiating all queues. Which addresses
> > a hidden bug in older verion in a more QEMU-like way.
> >
> > v8: set net->dev.vq_index correctly inside vhost_net_init() based on the
> > value from net->nc->queue_index.
>
> ...this chunk here is useful only on the mailing list, and not in git,
> and therefore, should appear...
Sorry that I may disagree here.
First of all, it does no harm at all to include few old version
descriptions. Instead, it may give some hints to the reader how
the patch evolves. Meanwhile, you will find they are quite common
in some well known open source projects, such as linux kernel:
[yliu@yliu-dev ~/linux]$ git log | grep '\<[vV][1-9][0-9]*:' | wc -l
10828
You can find them at qemu project (though not that common), too:
[yliu@yliu-dev ~/qemu]$ git log | grep '\<[vV][1-9][0-9]*:' | wc -l
390
So, if it's a qemu community specific culture, I could do what
you suggested.
If not, I'd like to put them into the commit log, as putting it
outside the commit log gives unnecessary extra burden to patch
author when he need update several version change information
in a patch set: he has to format the patch set first, and add
them one by one by editing those patches.
Thanks.
--yliu
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 1/2] vhost-user: add multiple queue support
2015-09-15 14:56 ` Eric Blake
@ 2015-09-16 2:07 ` Yuanhan Liu
0 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-16 2:07 UTC (permalink / raw)
To: Eric Blake; +Cc: jasowang, mst, qemu-devel, changchun.ouyang
On Tue, Sep 15, 2015 at 08:56:05AM -0600, Eric Blake wrote:
> On 09/15/2015 01:10 AM, Yuanhan Liu wrote:
> > From: Changchun Ouyang <changchun.ouyang@intel.com>
> >
> > This patch is initially based a patch from Nikolay Nikolaev.
>
> Subject line confusion - this is titled 1/2, but in reply to a cover
> letter titled 0/7, and where there is also a 1/7 patch, and where the
> 6/7 looks similar to this mail. I'll review that one instead, assuming
> this one is a sending glitch.
Oops, a careless mistake, sorry for that. Please ignore this patch.
--yliu
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support
2015-09-16 2:06 ` Yuanhan Liu
@ 2015-09-16 2:48 ` Yuanhan Liu
2015-09-16 8:10 ` Michael S. Tsirkin
2015-09-16 14:15 ` Eric Blake
2 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-16 2:48 UTC (permalink / raw)
To: Eric Blake; +Cc: jasowang, mst, qemu-devel, changchun.ouyang
On Wed, Sep 16, 2015 at 10:06:56AM +0800, Yuanhan Liu wrote:
> On Tue, Sep 15, 2015 at 09:02:07AM -0600, Eric Blake wrote:
> > On 09/15/2015 01:10 AM, Yuanhan Liu wrote:
> > > From: Changchun Ouyang <changchun.ouyang@intel.com>
> > >
> > > This patch is initially based a patch from Nikolay Nikolaev.
> > >
> > > Here is the latest version for adding vhost-user multiple queue support,
> > > by creating a nc and vhost_net pair for each queue.
> >
> > The phrase "Here is the latest version" doesn't make much sense in the
> > long term in git (that is, a year from now, we won't care how many
> > preliminary versions there were, just about the version that got
> > committed; and if anything in git changes after that point, it is no
> > longer the latest version).
>
> Yeah, good point.
>
> >
> > >
> > > Qemu exits if find that the backend can't support number of requested
> > > queues(by providing queues=# option). The max number is queried by a
> >
> > space before ( in English.
>
> Michael reminded me behore, and sorry for making such mistake again.
>
> And thanks for other typo corrections.
>
> >
> > > new message, VHOST_USER_GET_QUEUE_NUM, and is sent only when protocol
> > > feature VHOST_USER_PROTOCOL_F_MQ is present first.
> > >
> > > The max queue check is done at vhost-user initiation stage. We initiate
> > > one queue first, which, in the meantime, also gets the max_queues the
> > > backend supports.
> > >
> > > In older version, it was reported that some messages are sent more times
> > > than necessary. Here we came an agreement with Michael that we could
> > > categorize vhost user messages to 2 types: none-vring specific messages,
> >
> > s/none/non/
> >
> > > which should be sent only once, and vring specific messages, which should
> > > be sent per queue.
> > >
> > > Here I introduced a helper function vhost_user_one_time_request(), which
> > > lists following messages as none-vring specific messages:
> >
> > s/none/non/
> >
> > >
> > > VHOST_USER_GET_FEATURES
> > > VHOST_USER_SET_FEATURES
> > > VHOST_USER_GET_PROTOCOL_FEATURES
> > > VHOST_USER_SET_PROTOCOL_FEATURES
> > > VHOST_USER_SET_OWNER
> > > VHOST_USER_RESET_DEVICE
> > > VHOST_USER_SET_MEM_TABLE
> > > VHOST_USER_GET_QUEUE_NUM
> > >
> > > For above messages, we simply ignore them when they are not sent the first
> > > time.
> > >
> >
> > Up to here is mostly fine for the commit message. Meanwhile...
> >
> > > v9: per suggested by Jason Wang, we could invoke qemu_chr_add_handlers()
> > > once only, and invoke qemu_find_net_clients_except() at the handler
> > > to gather all related ncs, for initiating all queues. Which addresses
> > > a hidden bug in older verion in a more QEMU-like way.
> > >
> > > v8: set net->dev.vq_index correctly inside vhost_net_init() based on the
> > > value from net->nc->queue_index.
> >
> > ...this chunk here is useful only on the mailing list, and not in git,
> > and therefore, should appear...
>
> Sorry that I may disagree here.
>
> First of all, it does no harm at all to include few old version
> descriptions. Instead, it may give some hints to the reader how
> the patch evolves. Meanwhile, you will find they are quite common
> in some well known open source projects, such as linux kernel:
>
> [yliu@yliu-dev ~/linux]$ git log | grep '\<[vV][1-9][0-9]*:' | wc -l
> 10828
>
> You can find them at qemu project (though not that common), too:
>
> [yliu@yliu-dev ~/qemu]$ git log | grep '\<[vV][1-9][0-9]*:' | wc -l
> 390
>
> So, if it's a qemu community specific culture, I could do what
> you suggested.
>
> If not, I'd like to put them into the commit log, as putting it
> outside the commit log gives unnecessary extra burden to patch
> author when he need update several version change information
> in a patch set: he has to format the patch set first, and add
> them one by one by editing those patches.
Oops, I just found we can do that while editing the commit log (IIRC,
I had a similar try long time ago, and it seems it didn't work).
--yliu
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support
2015-09-16 2:06 ` Yuanhan Liu
2015-09-16 2:48 ` Yuanhan Liu
@ 2015-09-16 8:10 ` Michael S. Tsirkin
2015-09-16 8:23 ` Yuanhan Liu
2015-09-16 14:15 ` Eric Blake
2 siblings, 1 reply; 27+ messages in thread
From: Michael S. Tsirkin @ 2015-09-16 8:10 UTC (permalink / raw)
To: Yuanhan Liu; +Cc: jasowang, qemu-devel, changchun.ouyang
On Wed, Sep 16, 2015 at 10:06:56AM +0800, Yuanhan Liu wrote:
> If not, I'd like to put them into the commit log, as putting it
> outside the commit log gives unnecessary extra burden to patch
> author when he need update several version change information
> in a patch set: he has to format the patch set first, and add
> them one by one by editing those patches.
I personally just describe the changes in the cover letter.
In fact, while not a lot of people do this, git-backport-diff
(from https://github.com/codyprime/git-scripts.git)
is a handy tool to show which patches changed since the
previous version, and it only works if the change log
is in the cover letter.
Or you can stick --- in the commit log as you have found out -
but that depends on the patch author being careful to log
all edits.
--
MST
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
` (7 preceding siblings ...)
2015-09-15 7:10 ` [Qemu-devel] [PATCH 7/7] vhost-user: add a new message to disable/enable a specific virt queue Yuanhan Liu
@ 2015-09-16 8:12 ` Michael S. Tsirkin
2015-09-16 8:17 ` Yuanhan Liu
2015-09-16 11:39 ` Marcel Apfelbaum
2015-09-17 12:23 ` Michael S. Tsirkin
10 siblings, 1 reply; 27+ messages in thread
From: Michael S. Tsirkin @ 2015-09-16 8:12 UTC (permalink / raw)
To: Yuanhan Liu; +Cc: jasowang, qemu-devel, changchun.ouyang
On Tue, Sep 15, 2015 at 03:10:27PM +0800, Yuanhan Liu wrote:
> Hi,
>
> Here is the updated patch set for enabling vhost-user multiple queue.
Will review, thanks.
BTW, please use git format-patch -vX to format patches.
This will ensure that all patches include the version # in the subject.
--
MST
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support
2015-09-16 8:12 ` [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Michael S. Tsirkin
@ 2015-09-16 8:17 ` Yuanhan Liu
0 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-16 8:17 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: jasowang, qemu-devel, changchun.ouyang
On Wed, Sep 16, 2015 at 11:12:08AM +0300, Michael S. Tsirkin wrote:
> On Tue, Sep 15, 2015 at 03:10:27PM +0800, Yuanhan Liu wrote:
> > Hi,
> >
> > Here is the updated patch set for enabling vhost-user multiple queue.
>
> Will review, thanks.
Thank you!
> BTW, please use git format-patch -vX to format patches.
> This will ensure that all patches include the version # in the subject.
Thanks for the tip. Will bear that in mind.
--yliu
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support
2015-09-16 8:10 ` Michael S. Tsirkin
@ 2015-09-16 8:23 ` Yuanhan Liu
0 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-16 8:23 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: jasowang, qemu-devel, changchun.ouyang
On Wed, Sep 16, 2015 at 11:10:35AM +0300, Michael S. Tsirkin wrote:
> On Wed, Sep 16, 2015 at 10:06:56AM +0800, Yuanhan Liu wrote:
> > If not, I'd like to put them into the commit log, as putting it
> > outside the commit log gives unnecessary extra burden to patch
> > author when he need update several version change information
> > in a patch set: he has to format the patch set first, and add
> > them one by one by editing those patches.
>
> I personally just describe the changes in the cover letter.
I did that as well. I just thought metioning them inside the patch
again will make it clear for you to review.
--yliu
>
> In fact, while not a lot of people do this, git-backport-diff
> (from https://github.com/codyprime/git-scripts.git)
> is a handy tool to show which patches changed since the
> previous version, and it only works if the change log
> is in the cover letter.
>
> Or you can stick --- in the commit log as you have found out -
> but that depends on the patch author being careful to log
> all edits.
> --
> MST
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
` (8 preceding siblings ...)
2015-09-16 8:12 ` [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Michael S. Tsirkin
@ 2015-09-16 11:39 ` Marcel Apfelbaum
2015-09-16 12:23 ` Yuanhan Liu
2015-09-17 12:23 ` Michael S. Tsirkin
10 siblings, 1 reply; 27+ messages in thread
From: Marcel Apfelbaum @ 2015-09-16 11:39 UTC (permalink / raw)
To: Yuanhan Liu, qemu-devel; +Cc: jasowang, mst, changchun.ouyang
On 09/15/2015 10:10 AM, Yuanhan Liu wrote:
> Hi,
>
> Here is the updated patch set for enabling vhost-user multiple queue.
Hi,
I think this series will not work with the current DPDK vhost-user MQ patches,
can you please post an RFC on the dpdk list?
If you don't have anything reedy yet, a pointer to a git would also be appreciated.
Thanks,
Marcel
>
> This patch set introduces 2 more vhost user messages: VHOST_USER_GET_QUEUE_NUM,
> for querying how many queues the backend supports, and VHOST_USER_SET_VRING_ENABLE,
> for enabling/disabling a specific virt queue.
>
> Both of the two new messages are treated as vhost protocol extension,
> and that's why Michaels's patch "vhost-user: add protocol feature
> negotiation" is also included here.
>
> Patch 1-5 are all prepare works for actually enabling multiple queue.
>
> Patch 6 is the major patch for enabling multiple queue, which also tries
> to address two major concerns from Michael: no feedback from backend if
> it can't support # of requested queues, and all messages are sent N time.
> It also fixes a hidden bug.
>
> Patch 7 introduces the VHOST_USER_SET_VRING_ENABLE message, to enable
> or disable a specific vring.
>
> Note that I haven't done any formal test yet, it just passes build
> test and basic functional test, such as it does exit when backend
> doesn't support # of requested queues. Here I sent it out just for
> more comments, and for avoiding spending too much effort on the wrong
> track.
>
>
> v9: - Per suggested by Jason Wang, patch 5 introduces a new vhost
> backend method: vhost_backend_get_vq_index().
>
> - Use qemu_find_net_clients_except() at net/vhost-user.c for
> gathering all related ncs so that we could register chr dev
> event handler once. Which is also suggested by Jason Wang.
>
>
> Thanks.
>
> --yliu
>
> ---
> Changchun Ouyang (2):
> vhost-user: add multiple queue support
> vhost-user: add a new message to disable/enable a specific virt queue.
>
> Michael S. Tsirkin (1):
> vhost-user: add protocol feature negotiation
>
> Yuanhan Liu (4):
> vhost-user: use VHOST_USER_XXX macro for switch statement
> vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE
> vhost-user: add VHOST_USER_GET_QUEUE_NUM message
> vhost: introduce vhost_backend_get_vq_index method
>
> docs/specs/vhost-user.txt | 75 +++++++++++++++++++-
> hw/net/vhost_net.c | 39 ++++++++--
> hw/net/virtio-net.c | 8 +++
> hw/virtio/vhost-backend.c | 10 ++-
> hw/virtio/vhost-user.c | 143 +++++++++++++++++++++++++++++++------
> hw/virtio/vhost.c | 20 +++---
> include/hw/virtio/vhost-backend.h | 4 ++
> include/hw/virtio/vhost.h | 2 +
> include/net/vhost_net.h | 3 +
> linux-headers/linux/vhost.h | 2 +-
> net/vhost-user.c | 146 +++++++++++++++++++++++++++-----------
> qapi-schema.json | 6 +-
> qemu-options.hx | 5 +-
> tests/vhost-user-test.c | 2 +-
> 14 files changed, 380 insertions(+), 85 deletions(-)
>
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support
2015-09-16 11:39 ` Marcel Apfelbaum
@ 2015-09-16 12:23 ` Yuanhan Liu
2015-09-16 14:06 ` Marcel Apfelbaum
0 siblings, 1 reply; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-16 12:23 UTC (permalink / raw)
To: marcel; +Cc: jasowang, mst, qemu-devel, changchun.ouyang
On Wed, Sep 16, 2015 at 02:39:06PM +0300, Marcel Apfelbaum wrote:
> On 09/15/2015 10:10 AM, Yuanhan Liu wrote:
> >Hi,
> >
> >Here is the updated patch set for enabling vhost-user multiple queue.
>
> Hi,
>
> I think this series will not work with the current DPDK vhost-user MQ patches,
Yes. The new patch set since v7 has made interface changes. Hence it
will not work the v4 DPDK vhost-user MQ patches.
> can you please post an RFC on the dpdk list?
I guess you could see that soon, before the end of this week.
--yliu
> If you don't have anything reedy yet, a pointer to a git would also be appreciated.
>
> Thanks,
> Marcel
>
> >
> >This patch set introduces 2 more vhost user messages: VHOST_USER_GET_QUEUE_NUM,
> >for querying how many queues the backend supports, and VHOST_USER_SET_VRING_ENABLE,
> >for enabling/disabling a specific virt queue.
> >
> >Both of the two new messages are treated as vhost protocol extension,
> >and that's why Michaels's patch "vhost-user: add protocol feature
> >negotiation" is also included here.
> >
> >Patch 1-5 are all prepare works for actually enabling multiple queue.
> >
> >Patch 6 is the major patch for enabling multiple queue, which also tries
> >to address two major concerns from Michael: no feedback from backend if
> >it can't support # of requested queues, and all messages are sent N time.
> >It also fixes a hidden bug.
> >
> >Patch 7 introduces the VHOST_USER_SET_VRING_ENABLE message, to enable
> >or disable a specific vring.
> >
> >Note that I haven't done any formal test yet, it just passes build
> >test and basic functional test, such as it does exit when backend
> >doesn't support # of requested queues. Here I sent it out just for
> >more comments, and for avoiding spending too much effort on the wrong
> >track.
> >
> >
> >v9: - Per suggested by Jason Wang, patch 5 introduces a new vhost
> > backend method: vhost_backend_get_vq_index().
> >
> > - Use qemu_find_net_clients_except() at net/vhost-user.c for
> > gathering all related ncs so that we could register chr dev
> > event handler once. Which is also suggested by Jason Wang.
> >
> >
> >Thanks.
> >
> > --yliu
> >
> >---
> >Changchun Ouyang (2):
> > vhost-user: add multiple queue support
> > vhost-user: add a new message to disable/enable a specific virt queue.
> >
> >Michael S. Tsirkin (1):
> > vhost-user: add protocol feature negotiation
> >
> >Yuanhan Liu (4):
> > vhost-user: use VHOST_USER_XXX macro for switch statement
> > vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE
> > vhost-user: add VHOST_USER_GET_QUEUE_NUM message
> > vhost: introduce vhost_backend_get_vq_index method
> >
> > docs/specs/vhost-user.txt | 75 +++++++++++++++++++-
> > hw/net/vhost_net.c | 39 ++++++++--
> > hw/net/virtio-net.c | 8 +++
> > hw/virtio/vhost-backend.c | 10 ++-
> > hw/virtio/vhost-user.c | 143 +++++++++++++++++++++++++++++++------
> > hw/virtio/vhost.c | 20 +++---
> > include/hw/virtio/vhost-backend.h | 4 ++
> > include/hw/virtio/vhost.h | 2 +
> > include/net/vhost_net.h | 3 +
> > linux-headers/linux/vhost.h | 2 +-
> > net/vhost-user.c | 146 +++++++++++++++++++++++++++-----------
> > qapi-schema.json | 6 +-
> > qemu-options.hx | 5 +-
> > tests/vhost-user-test.c | 2 +-
> > 14 files changed, 380 insertions(+), 85 deletions(-)
> >
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support
2015-09-16 12:23 ` Yuanhan Liu
@ 2015-09-16 14:06 ` Marcel Apfelbaum
0 siblings, 0 replies; 27+ messages in thread
From: Marcel Apfelbaum @ 2015-09-16 14:06 UTC (permalink / raw)
To: Yuanhan Liu; +Cc: jasowang, mst, qemu-devel, changchun.ouyang
On 09/16/2015 03:23 PM, Yuanhan Liu wrote:
> On Wed, Sep 16, 2015 at 02:39:06PM +0300, Marcel Apfelbaum wrote:
>> On 09/15/2015 10:10 AM, Yuanhan Liu wrote:
>>> Hi,
>>>
>>> Here is the updated patch set for enabling vhost-user multiple queue.
>>
>> Hi,
>>
>> I think this series will not work with the current DPDK vhost-user MQ patches,
>
> Yes. The new patch set since v7 has made interface changes. Hence it
> will not work the v4 DPDK vhost-user MQ patches.
>
>> can you please post an RFC on the dpdk list?
>
> I guess you could see that soon, before the end of this week.
Appreciated!
Marcel
>
> --yliu
>
>
>> If you don't have anything reedy yet, a pointer to a git would also be appreciated.
>>
>> Thanks,
>> Marcel
>>
>>>
>>> This patch set introduces 2 more vhost user messages: VHOST_USER_GET_QUEUE_NUM,
>>> for querying how many queues the backend supports, and VHOST_USER_SET_VRING_ENABLE,
>>> for enabling/disabling a specific virt queue.
>>>
>>> Both of the two new messages are treated as vhost protocol extension,
>>> and that's why Michaels's patch "vhost-user: add protocol feature
>>> negotiation" is also included here.
>>>
>>> Patch 1-5 are all prepare works for actually enabling multiple queue.
>>>
>>> Patch 6 is the major patch for enabling multiple queue, which also tries
>>> to address two major concerns from Michael: no feedback from backend if
>>> it can't support # of requested queues, and all messages are sent N time.
>>> It also fixes a hidden bug.
>>>
>>> Patch 7 introduces the VHOST_USER_SET_VRING_ENABLE message, to enable
>>> or disable a specific vring.
>>>
>>> Note that I haven't done any formal test yet, it just passes build
>>> test and basic functional test, such as it does exit when backend
>>> doesn't support # of requested queues. Here I sent it out just for
>>> more comments, and for avoiding spending too much effort on the wrong
>>> track.
>>>
>>>
>>> v9: - Per suggested by Jason Wang, patch 5 introduces a new vhost
>>> backend method: vhost_backend_get_vq_index().
>>>
>>> - Use qemu_find_net_clients_except() at net/vhost-user.c for
>>> gathering all related ncs so that we could register chr dev
>>> event handler once. Which is also suggested by Jason Wang.
>>>
>>>
>>> Thanks.
>>>
>>> --yliu
>>>
>>> ---
>>> Changchun Ouyang (2):
>>> vhost-user: add multiple queue support
>>> vhost-user: add a new message to disable/enable a specific virt queue.
>>>
>>> Michael S. Tsirkin (1):
>>> vhost-user: add protocol feature negotiation
>>>
>>> Yuanhan Liu (4):
>>> vhost-user: use VHOST_USER_XXX macro for switch statement
>>> vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE
>>> vhost-user: add VHOST_USER_GET_QUEUE_NUM message
>>> vhost: introduce vhost_backend_get_vq_index method
>>>
>>> docs/specs/vhost-user.txt | 75 +++++++++++++++++++-
>>> hw/net/vhost_net.c | 39 ++++++++--
>>> hw/net/virtio-net.c | 8 +++
>>> hw/virtio/vhost-backend.c | 10 ++-
>>> hw/virtio/vhost-user.c | 143 +++++++++++++++++++++++++++++++------
>>> hw/virtio/vhost.c | 20 +++---
>>> include/hw/virtio/vhost-backend.h | 4 ++
>>> include/hw/virtio/vhost.h | 2 +
>>> include/net/vhost_net.h | 3 +
>>> linux-headers/linux/vhost.h | 2 +-
>>> net/vhost-user.c | 146 +++++++++++++++++++++++++++-----------
>>> qapi-schema.json | 6 +-
>>> qemu-options.hx | 5 +-
>>> tests/vhost-user-test.c | 2 +-
>>> 14 files changed, 380 insertions(+), 85 deletions(-)
>>>
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support
2015-09-16 2:06 ` Yuanhan Liu
2015-09-16 2:48 ` Yuanhan Liu
2015-09-16 8:10 ` Michael S. Tsirkin
@ 2015-09-16 14:15 ` Eric Blake
2015-09-16 14:53 ` Yuanhan Liu
2 siblings, 1 reply; 27+ messages in thread
From: Eric Blake @ 2015-09-16 14:15 UTC (permalink / raw)
To: Yuanhan Liu; +Cc: jasowang, mst, qemu-devel, changchun.ouyang
[-- Attachment #1: Type: text/plain, Size: 1977 bytes --]
On 09/15/2015 08:06 PM, Yuanhan Liu wrote:
>> Up to here is mostly fine for the commit message. Meanwhile...
>>
>>> v9: per suggested by Jason Wang, we could invoke qemu_chr_add_handlers()
>>> once only, and invoke qemu_find_net_clients_except() at the handler
>>> to gather all related ncs, for initiating all queues. Which addresses
>>> a hidden bug in older verion in a more QEMU-like way.
>>>
>>> v8: set net->dev.vq_index correctly inside vhost_net_init() based on the
>>> value from net->nc->queue_index.
>>
>> ...this chunk here is useful only on the mailing list, and not in git,
>> and therefore, should appear...
>
> Sorry that I may disagree here.
>
> First of all, it does no harm at all to include few old version
> descriptions. Instead, it may give some hints to the reader how
> the patch evolves. Meanwhile, you will find they are quite common
> in some well known open source projects, such as linux kernel:
There's nothing wrong with including patch changelog in your mail; in
fact it is encouraged by:
http://wiki.qemu.org/Contribute/SubmitAPatch
However, we DO request that you put it after ---, because we do NOT want
it in qemu.git log.
I don't care if the kernel has a slightly different policy, and is more
tolerant of changelogs leaked into the git log.
> You can find them at qemu project (though not that common), too:
>
> [yliu@yliu-dev ~/qemu]$ git log | grep '\<[vV][1-9][0-9]*:' | wc -l
> 390
They're not common for a reason - we've documented that we don't like
them in git. And that's because we expect the --- separator between the
git message and the changelog.
>
> So, if it's a qemu community specific culture, I could do what
> you suggested.
Yes, since it is documented at
http://wiki.qemu.org/Contribute/SubmitAPatch, it is qemu culture.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 604 bytes --]
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support
2015-09-16 14:15 ` Eric Blake
@ 2015-09-16 14:53 ` Yuanhan Liu
0 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-16 14:53 UTC (permalink / raw)
To: Eric Blake; +Cc: jasowang, mst, qemu-devel, changchun.ouyang
On Wed, Sep 16, 2015 at 08:15:59AM -0600, Eric Blake wrote:
> On 09/15/2015 08:06 PM, Yuanhan Liu wrote:
>
> >> Up to here is mostly fine for the commit message. Meanwhile...
> >>
> >>> v9: per suggested by Jason Wang, we could invoke qemu_chr_add_handlers()
> >>> once only, and invoke qemu_find_net_clients_except() at the handler
> >>> to gather all related ncs, for initiating all queues. Which addresses
> >>> a hidden bug in older verion in a more QEMU-like way.
> >>>
> >>> v8: set net->dev.vq_index correctly inside vhost_net_init() based on the
> >>> value from net->nc->queue_index.
> >>
> >> ...this chunk here is useful only on the mailing list, and not in git,
> >> and therefore, should appear...
> >
> > Sorry that I may disagree here.
> >
> > First of all, it does no harm at all to include few old version
> > descriptions. Instead, it may give some hints to the reader how
> > the patch evolves. Meanwhile, you will find they are quite common
> > in some well known open source projects, such as linux kernel:
>
> There's nothing wrong with including patch changelog in your mail; in
> fact it is encouraged by:
> http://wiki.qemu.org/Contribute/SubmitAPatch
>
> However, we DO request that you put it after ---, because we do NOT want
> it in qemu.git log.
>
> I don't care if the kernel has a slightly different policy, and is more
> tolerant of changelogs leaked into the git log.
>
>
> > You can find them at qemu project (though not that common), too:
> >
> > [yliu@yliu-dev ~/qemu]$ git log | grep '\<[vV][1-9][0-9]*:' | wc -l
> > 390
>
> They're not common for a reason - we've documented that we don't like
> them in git. And that's because we expect the --- separator between the
> git message and the changelog.
>
> >
> > So, if it's a qemu community specific culture, I could do what
> > you suggested.
>
> Yes, since it is documented at
> http://wiki.qemu.org/Contribute/SubmitAPatch, it is qemu culture.
Good to know, then.
Thanks.
--yliu
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 2/7] vhost-user: add protocol feature negotiation
2015-09-15 7:10 ` [Qemu-devel] [PATCH 2/7] vhost-user: add protocol feature negotiation Yuanhan Liu
@ 2015-09-17 7:12 ` Jason Wang
2015-09-17 7:20 ` Yuanhan Liu
0 siblings, 1 reply; 27+ messages in thread
From: Jason Wang @ 2015-09-17 7:12 UTC (permalink / raw)
To: Yuanhan Liu, qemu-devel; +Cc: changchun.ouyang, mst
On 09/15/2015 03:10 PM, Yuanhan Liu wrote:
> From: "Michael S. Tsirkin" <mst@redhat.com>
>
> Support a separate bitmask for vhost-user protocol features,
> and messages to get/set protocol features.
>
> Invoke them at init.
>
> No features are defined yet.
>
> v2: leverage vhost_user_call for request handling -- Yuanhan Liu
>
> Signed-off-by: Michael S. Tsirkin <address@hidden>
> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> ---
> docs/specs/vhost-user.txt | 37 +++++++++++++++++++++++++++++++++++++
> hw/net/vhost_net.c | 2 ++
> hw/virtio/vhost-user.c | 31 +++++++++++++++++++++++++++++++
> include/hw/virtio/vhost.h | 1 +
> 4 files changed, 71 insertions(+)
>
> diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
> index 650bb18..70da3b1 100644
> --- a/docs/specs/vhost-user.txt
> +++ b/docs/specs/vhost-user.txt
> @@ -113,6 +113,7 @@ message replies. Most of the requests don't require replies. Here is a list of
> the ones that do:
>
> * VHOST_GET_FEATURES
> + * VHOST_GET_PROTOCOL_FEATURES
> * VHOST_GET_VRING_BASE
>
> There are several messages that the master sends with file descriptors passed
> @@ -127,6 +128,13 @@ in the ancillary data:
> If Master is unable to send the full message or receives a wrong reply it will
> close the connection. An optional reconnection mechanism can be implemented.
>
> +Any protocol extensions are gated by protocol feature bits,
> +which allows full backwards compatibility on both master
> +and slave.
> +As older slaves don't support negotiating protocol features,
> +a feature bit was dedicated for this purpose:
> +#define VHOST_USER_F_PROTOCOL_FEATURES 30
> +
> Message types
> -------------
>
> @@ -138,6 +146,8 @@ Message types
> Slave payload: u64
>
> Get from the underlying vhost implementation the features bitmask.
> + Feature bit VHOST_USER_F_PROTOCOL_FEATURES signals slave support for
> + VHOST_USER_GET_PROTOCOL_FEATURES and VHOST_USER_SET_PROTOCOL_FEATURES.
>
> * VHOST_USER_SET_FEATURES
>
> @@ -146,6 +156,33 @@ Message types
> Master payload: u64
>
> Enable features in the underlying vhost implementation using a bitmask.
> + Feature bit VHOST_USER_F_PROTOCOL_FEATURES signals slave support for
> + VHOST_USER_GET_PROTOCOL_FEATURES and VHOST_USER_SET_PROTOCOL_FEATURES.
> +
> + * VHOST_USER_GET_PROTOCOL_FEATURES
> +
> + Id: 15
> + Equivalent ioctl: VHOST_GET_FEATURES
> + Master payload: N/A
> + Slave payload: u64
> +
> + Get the protocol feature bitmask from the underlying vhost implementation.
> + Only legal if feature bit VHOST_USER_F_PROTOCOL_FEATURES is present in
> + VHOST_USER_GET_FEATURES.
> + Note: slave that reported VHOST_USER_F_PROTOCOL_FEATURES must support
> + this message even before VHOST_USER_SET_FEATURES was called.
> +
> + * VHOST_USER_SET_PROTOCOL_FEATURES
> +
> + Id: 16
> + Ioctl: VHOST_SET_FEATURES
> + Master payload: u64
> +
> + Enable protocol features in the underlying vhost implementation.
> + Only legal if feature bit VHOST_USER_F_PROTOCOL_FEATURES is present in
> + VHOST_USER_GET_FEATURES.
> + Note: slave that reported VHOST_USER_F_PROTOCOL_FEATURES must support
> + this message even before VHOST_USER_SET_FEATURES was called.
>
> * VHOST_USER_SET_OWNER
>
> diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
> index 5c1d11f..c864237 100644
> --- a/hw/net/vhost_net.c
> +++ b/hw/net/vhost_net.c
> @@ -152,8 +152,10 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
> net->dev.backend_features = qemu_has_vnet_hdr(options->net_backend)
> ? 0 : (1ULL << VHOST_NET_F_VIRTIO_NET_HDR);
> net->backend = r;
> + net->dev.protocol_features = 0;
> } else {
> net->dev.backend_features = 0;
> + net->dev.protocol_features = 0;
> net->backend = -1;
> }
> net->nc = options->net_backend;
> diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
> index 13677ac..43169a1 100644
> --- a/hw/virtio/vhost-user.c
> +++ b/hw/virtio/vhost-user.c
> @@ -24,6 +24,8 @@
> #include <linux/vhost.h>
>
> #define VHOST_MEMORY_MAX_NREGIONS 8
> +#define VHOST_USER_F_PROTOCOL_FEATURES 30
> +#define VHOST_USER_PROTOCOL_FEATURE_MASK 0x0ULL
>
> typedef enum VhostUserRequest {
> VHOST_USER_NONE = 0,
> @@ -41,6 +43,8 @@ typedef enum VhostUserRequest {
> VHOST_USER_SET_VRING_KICK = 12,
> VHOST_USER_SET_VRING_CALL = 13,
> VHOST_USER_SET_VRING_ERR = 14,
> + VHOST_USER_GET_PROTOCOL_FEATURES = 15,
> + VHOST_USER_SET_PROTOCOL_FEATURES = 16,
> VHOST_USER_MAX
> } VhostUserRequest;
>
> @@ -206,11 +210,13 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
>
> switch (msg_request) {
> case VHOST_USER_GET_FEATURES:
> + case VHOST_USER_GET_PROTOCOL_FEATURES:
> need_reply = 1;
> break;
>
> case VHOST_USER_SET_FEATURES:
> case VHOST_USER_SET_LOG_BASE:
> + case VHOST_USER_SET_PROTOCOL_FEATURES:
> msg.u64 = *((__u64 *) arg);
> msg.size = sizeof(m.u64);
> break;
> @@ -308,6 +314,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
>
> switch (msg_request) {
> case VHOST_USER_GET_FEATURES:
> + case VHOST_USER_GET_PROTOCOL_FEATURES:
> if (msg.size != sizeof(m.u64)) {
> error_report("Received bad msg size.");
> return -1;
> @@ -333,10 +340,34 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
>
> static int vhost_user_init(struct vhost_dev *dev, void *opaque)
> {
> + unsigned long long features;
> + int err;
> +
> assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER);
>
> dev->opaque = opaque;
>
> + err = vhost_user_call(dev, VHOST_USER_GET_FEATURES, &features);
> + if (err < 0) {
> + return err;
> + }
> +
> + if (__virtio_has_feature(features, VHOST_USER_F_PROTOCOL_FEATURES)) {
Need rebase to master. (And use virtio_has_feature() here).
> + dev->backend_features |= 1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
> +
> + err = vhost_user_call(dev, VHOST_USER_GET_PROTOCOL_FEATURES, &features);
> + if (err < 0) {
> + return err;
> + }
> +
> + dev->protocol_features = features & VHOST_USER_PROTOCOL_FEATURE_MASK;
> + err = vhost_user_call(dev, VHOST_USER_SET_PROTOCOL_FEATURES,
> + &dev->protocol_features);
> + if (err < 0) {
> + return err;
> + }
> + }
> +
> return 0;
> }
>
> diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h
> index dd51050..6467c73 100644
> --- a/include/hw/virtio/vhost.h
> +++ b/include/hw/virtio/vhost.h
> @@ -47,6 +47,7 @@ struct vhost_dev {
> unsigned long long features;
> unsigned long long acked_features;
> unsigned long long backend_features;
> + unsigned long long protocol_features;
> bool started;
> bool log_enabled;
> unsigned long long log_size;
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 2/7] vhost-user: add protocol feature negotiation
2015-09-17 7:12 ` Jason Wang
@ 2015-09-17 7:20 ` Yuanhan Liu
0 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-17 7:20 UTC (permalink / raw)
To: Jason Wang; +Cc: changchun.ouyang, qemu-devel, mst
On Thu, Sep 17, 2015 at 03:12:55PM +0800, Jason Wang wrote:
>
>
> On 09/15/2015 03:10 PM, Yuanhan Liu wrote:
> > From: "Michael S. Tsirkin" <mst@redhat.com>
> >
> > Support a separate bitmask for vhost-user protocol features,
> > and messages to get/set protocol features.
> >
> > Invoke them at init.
> >
> > No features are defined yet.
> >
> > v2: leverage vhost_user_call for request handling -- Yuanhan Liu
> >
> > Signed-off-by: Michael S. Tsirkin <address@hidden>
> > Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> > ---
> > docs/specs/vhost-user.txt | 37 +++++++++++++++++++++++++++++++++++++
> > hw/net/vhost_net.c | 2 ++
> > hw/virtio/vhost-user.c | 31 +++++++++++++++++++++++++++++++
> > include/hw/virtio/vhost.h | 1 +
> > 4 files changed, 71 insertions(+)
> >
> > diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt
> > index 650bb18..70da3b1 100644
> > --- a/docs/specs/vhost-user.txt
> > +++ b/docs/specs/vhost-user.txt
> > @@ -113,6 +113,7 @@ message replies. Most of the requests don't require replies. Here is a list of
> > the ones that do:
> >
> > * VHOST_GET_FEATURES
> > + * VHOST_GET_PROTOCOL_FEATURES
> > * VHOST_GET_VRING_BASE
> >
> > There are several messages that the master sends with file descriptors passed
> > @@ -127,6 +128,13 @@ in the ancillary data:
> > If Master is unable to send the full message or receives a wrong reply it will
> > close the connection. An optional reconnection mechanism can be implemented.
> >
> > +Any protocol extensions are gated by protocol feature bits,
> > +which allows full backwards compatibility on both master
> > +and slave.
> > +As older slaves don't support negotiating protocol features,
> > +a feature bit was dedicated for this purpose:
> > +#define VHOST_USER_F_PROTOCOL_FEATURES 30
> > +
> > Message types
> > -------------
> >
> > @@ -138,6 +146,8 @@ Message types
> > Slave payload: u64
> >
> > Get from the underlying vhost implementation the features bitmask.
> > + Feature bit VHOST_USER_F_PROTOCOL_FEATURES signals slave support for
> > + VHOST_USER_GET_PROTOCOL_FEATURES and VHOST_USER_SET_PROTOCOL_FEATURES.
> >
> > * VHOST_USER_SET_FEATURES
> >
> > @@ -146,6 +156,33 @@ Message types
> > Master payload: u64
> >
> > Enable features in the underlying vhost implementation using a bitmask.
> > + Feature bit VHOST_USER_F_PROTOCOL_FEATURES signals slave support for
> > + VHOST_USER_GET_PROTOCOL_FEATURES and VHOST_USER_SET_PROTOCOL_FEATURES.
> > +
> > + * VHOST_USER_GET_PROTOCOL_FEATURES
> > +
> > + Id: 15
> > + Equivalent ioctl: VHOST_GET_FEATURES
> > + Master payload: N/A
> > + Slave payload: u64
> > +
> > + Get the protocol feature bitmask from the underlying vhost implementation.
> > + Only legal if feature bit VHOST_USER_F_PROTOCOL_FEATURES is present in
> > + VHOST_USER_GET_FEATURES.
> > + Note: slave that reported VHOST_USER_F_PROTOCOL_FEATURES must support
> > + this message even before VHOST_USER_SET_FEATURES was called.
> > +
> > + * VHOST_USER_SET_PROTOCOL_FEATURES
> > +
> > + Id: 16
> > + Ioctl: VHOST_SET_FEATURES
> > + Master payload: u64
> > +
> > + Enable protocol features in the underlying vhost implementation.
> > + Only legal if feature bit VHOST_USER_F_PROTOCOL_FEATURES is present in
> > + VHOST_USER_GET_FEATURES.
> > + Note: slave that reported VHOST_USER_F_PROTOCOL_FEATURES must support
> > + this message even before VHOST_USER_SET_FEATURES was called.
> >
> > * VHOST_USER_SET_OWNER
> >
> > diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
> > index 5c1d11f..c864237 100644
> > --- a/hw/net/vhost_net.c
> > +++ b/hw/net/vhost_net.c
> > @@ -152,8 +152,10 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
> > net->dev.backend_features = qemu_has_vnet_hdr(options->net_backend)
> > ? 0 : (1ULL << VHOST_NET_F_VIRTIO_NET_HDR);
> > net->backend = r;
> > + net->dev.protocol_features = 0;
> > } else {
> > net->dev.backend_features = 0;
> > + net->dev.protocol_features = 0;
> > net->backend = -1;
> > }
> > net->nc = options->net_backend;
> > diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
> > index 13677ac..43169a1 100644
> > --- a/hw/virtio/vhost-user.c
> > +++ b/hw/virtio/vhost-user.c
> > @@ -24,6 +24,8 @@
> > #include <linux/vhost.h>
> >
> > #define VHOST_MEMORY_MAX_NREGIONS 8
> > +#define VHOST_USER_F_PROTOCOL_FEATURES 30
> > +#define VHOST_USER_PROTOCOL_FEATURE_MASK 0x0ULL
> >
> > typedef enum VhostUserRequest {
> > VHOST_USER_NONE = 0,
> > @@ -41,6 +43,8 @@ typedef enum VhostUserRequest {
> > VHOST_USER_SET_VRING_KICK = 12,
> > VHOST_USER_SET_VRING_CALL = 13,
> > VHOST_USER_SET_VRING_ERR = 14,
> > + VHOST_USER_GET_PROTOCOL_FEATURES = 15,
> > + VHOST_USER_SET_PROTOCOL_FEATURES = 16,
> > VHOST_USER_MAX
> > } VhostUserRequest;
> >
> > @@ -206,11 +210,13 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
> >
> > switch (msg_request) {
> > case VHOST_USER_GET_FEATURES:
> > + case VHOST_USER_GET_PROTOCOL_FEATURES:
> > need_reply = 1;
> > break;
> >
> > case VHOST_USER_SET_FEATURES:
> > case VHOST_USER_SET_LOG_BASE:
> > + case VHOST_USER_SET_PROTOCOL_FEATURES:
> > msg.u64 = *((__u64 *) arg);
> > msg.size = sizeof(m.u64);
> > break;
> > @@ -308,6 +314,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
> >
> > switch (msg_request) {
> > case VHOST_USER_GET_FEATURES:
> > + case VHOST_USER_GET_PROTOCOL_FEATURES:
> > if (msg.size != sizeof(m.u64)) {
> > error_report("Received bad msg size.");
> > return -1;
> > @@ -333,10 +340,34 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
> >
> > static int vhost_user_init(struct vhost_dev *dev, void *opaque)
> > {
> > + unsigned long long features;
> > + int err;
> > +
> > assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_USER);
> >
> > dev->opaque = opaque;
> >
> > + err = vhost_user_call(dev, VHOST_USER_GET_FEATURES, &features);
> > + if (err < 0) {
> > + return err;
> > + }
> > +
> > + if (__virtio_has_feature(features, VHOST_USER_F_PROTOCOL_FEATURES)) {
>
> Need rebase to master. (And use virtio_has_feature() here).
Thanks. Will fix them in next version.
--yliu
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
` (9 preceding siblings ...)
2015-09-16 11:39 ` Marcel Apfelbaum
@ 2015-09-17 12:23 ` Michael S. Tsirkin
2015-09-18 1:18 ` Yuanhan Liu
10 siblings, 1 reply; 27+ messages in thread
From: Michael S. Tsirkin @ 2015-09-17 12:23 UTC (permalink / raw)
To: Yuanhan Liu; +Cc: jasowang, qemu-devel, changchun.ouyang
On Tue, Sep 15, 2015 at 03:10:27PM +0800, Yuanhan Liu wrote:
> Hi,
>
> Here is the updated patch set for enabling vhost-user multiple queue.
> This patch set introduces 2 more vhost user messages: VHOST_USER_GET_QUEUE_NUM,
> for querying how many queues the backend supports, and VHOST_USER_SET_VRING_ENABLE,
> for enabling/disabling a specific virt queue.
>
> Both of the two new messages are treated as vhost protocol extension,
> and that's why Michaels's patch "vhost-user: add protocol feature
> negotiation" is also included here.
>
> Patch 1-5 are all prepare works for actually enabling multiple queue.
>
> Patch 6 is the major patch for enabling multiple queue, which also tries
> to address two major concerns from Michael: no feedback from backend if
> it can't support # of requested queues, and all messages are sent N time.
> It also fixes a hidden bug.
>
> Patch 7 introduces the VHOST_USER_SET_VRING_ENABLE message, to enable
> or disable a specific vring.
>
> Note that I haven't done any formal test yet, it just passes build
> test and basic functional test, such as it does exit when backend
> doesn't support # of requested queues. Here I sent it out just for
> more comments, and for avoiding spending too much effort on the wrong
> track.
>
This looks reasonable to me.
Pls rebase, test and re-post with fixed numbering, and I can merge.
Please post the dpdk patches too (preferably Cc me) so
it's testable by others.
>
> v9: - Per suggested by Jason Wang, patch 5 introduces a new vhost
> backend method: vhost_backend_get_vq_index().
>
> - Use qemu_find_net_clients_except() at net/vhost-user.c for
> gathering all related ncs so that we could register chr dev
> event handler once. Which is also suggested by Jason Wang.
>
>
> Thanks.
>
> --yliu
>
> ---
> Changchun Ouyang (2):
> vhost-user: add multiple queue support
> vhost-user: add a new message to disable/enable a specific virt queue.
>
> Michael S. Tsirkin (1):
> vhost-user: add protocol feature negotiation
>
> Yuanhan Liu (4):
> vhost-user: use VHOST_USER_XXX macro for switch statement
> vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE
> vhost-user: add VHOST_USER_GET_QUEUE_NUM message
> vhost: introduce vhost_backend_get_vq_index method
>
> docs/specs/vhost-user.txt | 75 +++++++++++++++++++-
> hw/net/vhost_net.c | 39 ++++++++--
> hw/net/virtio-net.c | 8 +++
> hw/virtio/vhost-backend.c | 10 ++-
> hw/virtio/vhost-user.c | 143 +++++++++++++++++++++++++++++++------
> hw/virtio/vhost.c | 20 +++---
> include/hw/virtio/vhost-backend.h | 4 ++
> include/hw/virtio/vhost.h | 2 +
> include/net/vhost_net.h | 3 +
> linux-headers/linux/vhost.h | 2 +-
> net/vhost-user.c | 146 +++++++++++++++++++++++++++-----------
> qapi-schema.json | 6 +-
> qemu-options.hx | 5 +-
> tests/vhost-user-test.c | 2 +-
> 14 files changed, 380 insertions(+), 85 deletions(-)
>
> --
> 1.9.0
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support
2015-09-17 12:23 ` Michael S. Tsirkin
@ 2015-09-18 1:18 ` Yuanhan Liu
0 siblings, 0 replies; 27+ messages in thread
From: Yuanhan Liu @ 2015-09-18 1:18 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: jasowang, qemu-devel, changchun.ouyang
On Thu, Sep 17, 2015 at 03:23:55PM +0300, Michael S. Tsirkin wrote:
> On Tue, Sep 15, 2015 at 03:10:27PM +0800, Yuanhan Liu wrote:
> > Hi,
> >
> > Here is the updated patch set for enabling vhost-user multiple queue.
> > This patch set introduces 2 more vhost user messages: VHOST_USER_GET_QUEUE_NUM,
> > for querying how many queues the backend supports, and VHOST_USER_SET_VRING_ENABLE,
> > for enabling/disabling a specific virt queue.
> >
> > Both of the two new messages are treated as vhost protocol extension,
> > and that's why Michaels's patch "vhost-user: add protocol feature
> > negotiation" is also included here.
> >
> > Patch 1-5 are all prepare works for actually enabling multiple queue.
> >
> > Patch 6 is the major patch for enabling multiple queue, which also tries
> > to address two major concerns from Michael: no feedback from backend if
> > it can't support # of requested queues, and all messages are sent N time.
> > It also fixes a hidden bug.
> >
> > Patch 7 introduces the VHOST_USER_SET_VRING_ENABLE message, to enable
> > or disable a specific vring.
> >
> > Note that I haven't done any formal test yet, it just passes build
> > test and basic functional test, such as it does exit when backend
> > doesn't support # of requested queues. Here I sent it out just for
> > more comments, and for avoiding spending too much effort on the wrong
> > track.
> >
>
> This looks reasonable to me.
> Pls rebase, test and re-post with fixed numbering, and I can merge.
> Please post the dpdk patches too (preferably Cc me) so
> it's testable by others.
Michael,
Thanks a lot! And I was doing that.
--yliu
>
> >
> > v9: - Per suggested by Jason Wang, patch 5 introduces a new vhost
> > backend method: vhost_backend_get_vq_index().
> >
> > - Use qemu_find_net_clients_except() at net/vhost-user.c for
> > gathering all related ncs so that we could register chr dev
> > event handler once. Which is also suggested by Jason Wang.
> >
> >
> > Thanks.
> >
> > --yliu
> >
> > ---
> > Changchun Ouyang (2):
> > vhost-user: add multiple queue support
> > vhost-user: add a new message to disable/enable a specific virt queue.
> >
> > Michael S. Tsirkin (1):
> > vhost-user: add protocol feature negotiation
> >
> > Yuanhan Liu (4):
> > vhost-user: use VHOST_USER_XXX macro for switch statement
> > vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE
> > vhost-user: add VHOST_USER_GET_QUEUE_NUM message
> > vhost: introduce vhost_backend_get_vq_index method
> >
> > docs/specs/vhost-user.txt | 75 +++++++++++++++++++-
> > hw/net/vhost_net.c | 39 ++++++++--
> > hw/net/virtio-net.c | 8 +++
> > hw/virtio/vhost-backend.c | 10 ++-
> > hw/virtio/vhost-user.c | 143 +++++++++++++++++++++++++++++++------
> > hw/virtio/vhost.c | 20 +++---
> > include/hw/virtio/vhost-backend.h | 4 ++
> > include/hw/virtio/vhost.h | 2 +
> > include/net/vhost_net.h | 3 +
> > linux-headers/linux/vhost.h | 2 +-
> > net/vhost-user.c | 146 +++++++++++++++++++++++++++-----------
> > qapi-schema.json | 6 +-
> > qemu-options.hx | 5 +-
> > tests/vhost-user-test.c | 2 +-
> > 14 files changed, 380 insertions(+), 85 deletions(-)
> >
> > --
> > 1.9.0
^ permalink raw reply [flat|nested] 27+ messages in thread
end of thread, other threads:[~2015-09-18 1:17 UTC | newest]
Thread overview: 27+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-09-15 7:10 [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 1/7] vhost-user: use VHOST_USER_XXX macro for switch statement Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 1/2] vhost-user: add multiple queue support Yuanhan Liu
2015-09-15 14:56 ` Eric Blake
2015-09-16 2:07 ` Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 2/7] vhost-user: add protocol feature negotiation Yuanhan Liu
2015-09-17 7:12 ` Jason Wang
2015-09-17 7:20 ` Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 3/7] vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 4/7] vhost-user: add VHOST_USER_GET_QUEUE_NUM message Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 5/7] vhost: introduce vhost_backend_get_vq_index method Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 6/7] vhost-user: add multiple queue support Yuanhan Liu
2015-09-15 15:02 ` Eric Blake
2015-09-16 2:06 ` Yuanhan Liu
2015-09-16 2:48 ` Yuanhan Liu
2015-09-16 8:10 ` Michael S. Tsirkin
2015-09-16 8:23 ` Yuanhan Liu
2015-09-16 14:15 ` Eric Blake
2015-09-16 14:53 ` Yuanhan Liu
2015-09-15 7:10 ` [Qemu-devel] [PATCH 7/7] vhost-user: add a new message to disable/enable a specific virt queue Yuanhan Liu
2015-09-16 8:12 ` [Qemu-devel] [PATCH 0/7 v9] vhost-user multiple queue support Michael S. Tsirkin
2015-09-16 8:17 ` Yuanhan Liu
2015-09-16 11:39 ` Marcel Apfelbaum
2015-09-16 12:23 ` Yuanhan Liu
2015-09-16 14:06 ` Marcel Apfelbaum
2015-09-17 12:23 ` Michael S. Tsirkin
2015-09-18 1:18 ` Yuanhan Liu
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