Re: [dpdk-dev] [PATCH v6 4/5] vhost: unify message handling function signature
On Tue, Oct 2, 2018 at 11:59 AM Maxime Coquelin
wrote:
>
>
>
> On 09/24/2018 10:17 PM, Nikolay Nikolaev wrote:
> > Each vhost-user message handling function will return an int result
> > which is described in the new enum vh_result: error, OK and reply.
> > All functions will now have two arguments, virtio_net double pointer
> > and VhostUserMsg pointer.
> >
> > Signed-off-by: Nikolay Nikolaev
> > ---
> > lib/librte_vhost/vhost_user.c | 211
> > -
> > 1 file changed, 125 insertions(+), 86 deletions(-)
> >
> > diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
> > index 77905dda0..e1b705fa7 100644
> > --- a/lib/librte_vhost/vhost_user.c
> > +++ b/lib/librte_vhost/vhost_user.c
> > @@ -71,6 +71,16 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
> > [VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
> > };
> >
> > +/* The possible results of a message handling function */
> > +enum vh_result {
> > + /* Message handling failed */
> > + VH_RESULT_ERR = -1,
> > + /* Message handling successful */
> > + VH_RESULT_OK= 0,
> > + /* Message handling successful and reply prepared */
> > + VH_RESULT_REPLY = 1,
> > +};
> > +
>
>
> > -vhost_user_get_vring_base(struct virtio_net *dev,
> > +vhost_user_get_vring_base(struct virtio_net **pdev,
> > struct VhostUserMsg *msg)
> > {
> > + struct virtio_net *dev = *pdev;
> > struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
> >
> > /* We have to stop the queue (virtio) if it is running. */
> > @@ -1135,7 +1161,7 @@ vhost_user_get_vring_base(struct virtio_net *dev,
> >
> > msg->size = sizeof(msg->payload.state);
> >
> > - return 0;
> > + return VH_RESULT_OK;
> > }
>
> VH_RESULT_REPLY here.
>
> > -static void
> > -vhost_user_get_protocol_features(struct virtio_net *dev,
> > +static int
> > +vhost_user_get_protocol_features(struct virtio_net **pdev,
> >struct VhostUserMsg *msg)
> > {
> > + struct virtio_net *dev = *pdev;
> > uint64_t features, protocol_features;
> >
> > rte_vhost_driver_get_features(dev->ifname, &features);
> > @@ -1189,40 +1217,46 @@ vhost_user_get_protocol_features(struct virtio_net
> > *dev,
> >
> > msg->payload.u64 = protocol_features;
> > msg->size = sizeof(msg->payload.u64);
> > +
> > + return VH_RESULT_OK;
> > }
>
> Ditto.
>
> I have the patches to fix these, it will be posted as preliminary part
> of my postcopy series.
>
> Please, next time, test your series before posting.
Oh, sorry for that. I obviously underestimated the complexity of the refactoring
and indeed did not test beyond compilation and visual code inspect,
which of course can not be excused.
I guess at least running the vhost sample against qemu would have
shown these issues.
I'm sorry again, I could have done better.
regards,
Nikolay Nikolaev
>
> Thanks,
> Maxime
[dpdk-dev] [PATCH v1 0/5] vhost_user.c code cleanup
vhost: vhost_user.c code cleanup This patchesries introduce a set of code redesigns in vhost_user.c. The goal is to unify and simplify vhost-user message handling. The patches do not intend to introduce any functional changes. --- Nikolay Nikolaev (5): vhost: unify VhostUserMsg usage vhost: make message handling functions prepare the reply vhost: handle unsupported message types in functions vhost: unify message handling function signature vhost: message handling implemented as a callback array lib/librte_vhost/vhost_user.c | 391 ++--- 1 file changed, 208 insertions(+), 183 deletions(-) -- Signature
[dpdk-dev] [PATCH v1 1/5] vhost: unify VhostUserMsg usage
Use the typedef version of struct VhostUserMsg. Also unify the related
parameter name.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 50 +
1 file changed, 25 insertions(+), 25 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 26cfebec0..9b5598871 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -706,10 +706,10 @@ vhost_memory_changed(struct VhostUserMemory *new,
}
static int
-vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_mem_table(struct virtio_net **pdev, VhostUserMsg *msg)
{
struct virtio_net *dev = *pdev;
- struct VhostUserMemory memory = pmsg->payload.memory;
+ struct VhostUserMemory memory = msg->payload.memory;
struct rte_vhost_mem_region *reg;
void *mmap_addr;
uint64_t mmap_size;
@@ -730,7 +730,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
"(%d) memory regions not changed\n", dev->vid);
for (i = 0; i < memory.nregions; i++)
- close(pmsg->fds[i]);
+ close(msg->fds[i]);
return 0;
}
@@ -766,7 +766,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
dev->mem->nregions = memory.nregions;
for (i = 0; i < memory.nregions; i++) {
- fd = pmsg->fds[i];
+ fd = msg->fds[i];
reg = &dev->mem->regions[i];
reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
@@ -905,16 +905,16 @@ virtio_is_ready(struct virtio_net *dev)
}
static void
-vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_call(struct virtio_net *dev, VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring call idx:%d file:%d\n", file.index, file.fd);
@@ -926,17 +926,17 @@ vhost_user_set_vring_call(struct virtio_net *dev, struct
VhostUserMsg *pmsg)
}
static void
-vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_kick(struct virtio_net **pdev, VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
struct virtio_net *dev = *pdev;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring kick idx:%d file:%d\n", file.index, file.fd);
@@ -1058,7 +1058,7 @@ vhost_user_set_vring_enable(struct virtio_net *dev,
static void
vhost_user_get_protocol_features(struct virtio_net *dev,
-struct VhostUserMsg *msg)
+VhostUserMsg *msg)
{
uint64_t features, protocol_features;
@@ -1089,7 +1089,7 @@ vhost_user_set_protocol_features(struct virtio_net *dev,
}
static int
-vhost_user_set_log_base(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_set_log_base(struct virtio_net *dev, VhostUserMsg *msg)
{
int fd = msg->fds[0];
uint64_t size, off;
@@ -1156,7 +1156,7 @@ vhost_user_set_log_base(struct virtio_net *dev, struct
VhostUserMsg *msg)
* a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
*/
static int
-vhost_user_send_rarp(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_send_rarp(struct virtio_net *dev, VhostUserMsg *msg)
{
uint8_t *mac = (uint8_t *)&msg->payload.u64;
struct rte_vdpa_device *vdpa_dev;
@@ -1185,7 +1185,7 @@ vhost_user_send_rarp(struct virtio_net *dev, struct
VhostUserMsg *msg)
}
static int
-vhost_user_net_set_mtu(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_net_set_mtu(struct virtio_net *dev, VhostUserMsg *msg)
{
if (msg->payload.u64 < VIRTIO_MIN_MTU ||
msg->payload.u64 > VIRTIO_MAX_MTU) {
@@ -1201,7 +1201,7 @@ vhost_user_net_se
[dpdk-dev] [PATCH v1 3/5] vhost: handle unsupported message types in functions
Add new functions to handle the unsupported vhost message types:
- vhost_user_set_vring_err
- vhost_user_set_log_fd
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 22 +-
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 1bc3d1629..d999c80ed 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -933,6 +933,14 @@ vhost_user_set_vring_call(struct virtio_net *dev,
VhostUserMsg *msg)
vq->callfd = file.fd;
}
+static void vhost_user_set_vring_err(struct virtio_net *dev __rte_unused,
+ VhostUserMsg *msg)
+{
+ if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+}
+
static void
vhost_user_set_vring_kick(struct virtio_net **pdev, VhostUserMsg *msg)
{
@@ -1159,6 +1167,13 @@ vhost_user_set_log_base(struct virtio_net *dev,
VhostUserMsg *msg)
return 0;
}
+static void
+vhost_user_set_log_fd(struct virtio_net *dev __rte_unused, VhostUserMsg *msg)
+{
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+}
+
/*
* An rarp packet is constructed and broadcasted to notify switches about
* the new location of the migrated VM, so that packets from outside will
@@ -1602,8 +1617,7 @@ vhost_user_msg_handler(int vid, int fd)
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+ vhost_user_set_log_fd(dev, &msg);
break;
case VHOST_USER_SET_VRING_NUM:
@@ -1629,9 +1643,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_SET_VRING_ERR:
- if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+ vhost_user_set_vring_err(dev, &msg);
break;
case VHOST_USER_GET_QUEUE_NUM:
[dpdk-dev] [PATCH v1 2/5] vhost: make message handling functions prepare the reply
As VhostUserMsg structure is resued to generate the reply, move the
relevant fields update into the respective message handling functions.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 26 --
1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 9b5598871..1bc3d1629 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -146,11 +146,15 @@ vhost_user_reset_owner(struct virtio_net *dev)
* The features that we support are requested.
*/
static uint64_t
-vhost_user_get_features(struct virtio_net *dev)
+vhost_user_get_features(struct virtio_net *dev, VhostUserMsg *msg)
{
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
+
+ msg->payload.u64 = features;
+ msg->size = sizeof(msg->payload.u64);
+
return features;
}
@@ -158,11 +162,15 @@ vhost_user_get_features(struct virtio_net *dev)
* The queue number that we support are requested.
*/
static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev)
+vhost_user_get_queue_num(struct virtio_net *dev, VhostUserMsg *msg)
{
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
+
+ msg->payload.u64 = (uint64_t)queue_num;
+ msg->size = sizeof(msg->payload.u64);
+
return queue_num;
}
@@ -1022,6 +1030,8 @@ vhost_user_get_vring_base(struct virtio_net *dev,
rte_free(vq->batch_copy_elems);
vq->batch_copy_elems = NULL;
+ msg->size = sizeof(msg->payload.state);
+
return 0;
}
@@ -1144,6 +1154,8 @@ vhost_user_set_log_base(struct virtio_net *dev,
VhostUserMsg *msg)
dev->log_base = dev->log_addr + off;
dev->log_size = size;
+ msg->size = sizeof(msg->payload.u64);
+
return 0;
}
@@ -1557,8 +1569,7 @@ vhost_user_msg_handler(int vid, int fd)
switch (msg.request.master) {
case VHOST_USER_GET_FEATURES:
- msg.payload.u64 = vhost_user_get_features(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_features(dev, &msg);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_FEATURES:
@@ -1588,9 +1599,6 @@ vhost_user_msg_handler(int vid, int fd)
case VHOST_USER_SET_LOG_BASE:
vhost_user_set_log_base(dev, &msg);
-
- /* it needs a reply */
- msg.size = sizeof(msg.payload.u64);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
@@ -1610,7 +1618,6 @@ vhost_user_msg_handler(int vid, int fd)
case VHOST_USER_GET_VRING_BASE:
vhost_user_get_vring_base(dev, &msg);
- msg.size = sizeof(msg.payload.state);
send_vhost_reply(fd, &msg);
break;
@@ -1628,8 +1635,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_GET_QUEUE_NUM:
- msg.payload.u64 = (uint64_t)vhost_user_get_queue_num(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_queue_num(dev, &msg);
send_vhost_reply(fd, &msg);
break;
[dpdk-dev] [PATCH v1 4/5] vhost: unify message handling function signature
Each vhost-user message handlign function will return an int result
which is described in the new enum vh_result: error, OK and reply.
All functions will now have two arguments, virtio_net double pointer
and VhostUserMsg pointer.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 217 -
1 file changed, 129 insertions(+), 88 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index d999c80ed..dd47d84c7 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -71,6 +71,16 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
};
+/* The possible results of a message handling function */
+enum vh_result {
+ /* Message handlig failed */
+ VH_RESULT_ERR = -1,
+ /* Message handlig successful */
+ VH_RESULT_OK= 0,
+ /* Message handlig successful and reply prepared */
+ VH_RESULT_REPLY = 1
+};
+
static uint64_t
get_blk_size(int fd)
{
@@ -127,27 +137,31 @@ vhost_backend_cleanup(struct virtio_net *dev)
* the device hasn't been initialised.
*/
static int
-vhost_user_set_owner(void)
+vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
+ VhostUserMsg * msg __rte_unused)
{
- return 0;
+ return VH_RESULT_OK;
}
static int
-vhost_user_reset_owner(struct virtio_net *dev)
+vhost_user_reset_owner(struct virtio_net **pdev,
+ VhostUserMsg * msg __rte_unused)
{
+ struct virtio_net *dev = *pdev;
vhost_destroy_device_notify(dev);
cleanup_device(dev, 0);
reset_device(dev);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The features that we support are requested.
*/
-static uint64_t
-vhost_user_get_features(struct virtio_net *dev, VhostUserMsg *msg)
+static int
+vhost_user_get_features(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
@@ -155,15 +169,16 @@ vhost_user_get_features(struct virtio_net *dev,
VhostUserMsg *msg)
msg->payload.u64 = features;
msg->size = sizeof(msg->payload.u64);
- return features;
+ return VH_RESULT_REPLY;
}
/*
* The queue number that we support are requested.
*/
-static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev, VhostUserMsg *msg)
+static int
+vhost_user_get_queue_num(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
@@ -171,15 +186,17 @@ vhost_user_get_queue_num(struct virtio_net *dev,
VhostUserMsg *msg)
msg->payload.u64 = (uint64_t)queue_num;
msg->size = sizeof(msg->payload.u64);
- return queue_num;
+ return VH_RESULT_REPLY;
}
/*
* We receive the negotiated features supported by us and the virtio device.
*/
static int
-vhost_user_set_features(struct virtio_net *dev, uint64_t features)
+vhost_user_set_features(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
+ uint64_t features = msg->payload.u64;
uint64_t vhost_features = 0;
struct rte_vdpa_device *vdpa_dev;
int did = -1;
@@ -189,12 +206,12 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) received invalid negotiated features.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->flags & VIRTIO_DEV_RUNNING) {
if (dev->features == features)
- return 0;
+ return VH_RESULT_OK;
/*
* Error out if master tries to change features while device is
@@ -205,7 +222,7 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) features changed while device is
running.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->notify_ops->features_changed)
@@ -250,16 +267,17 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
if (vdpa_dev && vdpa_dev->ops->set_features)
vdpa_dev->ops->set_features(dev->vid);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The virtio device sends us the size of the descriptor ring.
*/
static int
-vhost_user_set_vring_num(struct virtio_net *dev,
+vhost_user_set_vring_num(struct virtio_net **pdev,
[dpdk-dev] [PATCH v1 5/5] vhost: message handling implemented as a callback array
Introduce vhost_message_handlers, which maps the message request
type to the message handler. Then replace the switch construct
with a map and call.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 144 -
1 file changed, 55 insertions(+), 89 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index dd47d84c7..e62164d63 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1379,6 +1379,36 @@ vhost_user_iotlb_msg(struct virtio_net **pdev,
VhostUserMsg *msg)
return VH_RESULT_OK;
}
+typedef int (*message_handler)(struct virtio_net **pdev, VhostUserMsg * msg);
+static message_handler vhost_message_handlers[VHOST_USER_MAX] = {
+ [VHOST_USER_NONE] = NULL,
+ [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
+ [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
+ [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
+ [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
+ [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
+ [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
+ [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
+ [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
+ [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
+ [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
+ [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
+ [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
+ [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
+ [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
+ [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
+ [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
+ [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
+ [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
+ [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
+ [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
+ [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
+ [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
+ [VHOST_USER_CRYPTO_CREATE_SESS] = NULL,
+ [VHOST_USER_CRYPTO_CLOSE_SESS] = NULL,
+};
+
+
/* return bytes# of read on success or negative val on failure. */
static int
read_vhost_message(int sockfd, VhostUserMsg *msg)
@@ -1623,97 +1653,33 @@ vhost_user_msg_handler(int vid, int fd)
goto skip_to_post_handle;
}
- switch (msg.request.master) {
- case VHOST_USER_GET_FEATURES:
- ret = vhost_user_get_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_FEATURES:
- ret = vhost_user_set_features(&dev, &msg);
- if (ret)
- return -1;
- break;
-
- case VHOST_USER_GET_PROTOCOL_FEATURES:
- ret = vhost_user_get_protocol_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_PROTOCOL_FEATURES:
- ret = vhost_user_set_protocol_features(&dev, &msg);
- break;
-
- case VHOST_USER_SET_OWNER:
- ret = vhost_user_set_owner(&dev, &msg);
- break;
- case VHOST_USER_RESET_OWNER:
- ret = vhost_user_reset_owner(&dev, &msg);
- break;
-
- case VHOST_USER_SET_MEM_TABLE:
- ret = vhost_user_set_mem_table(&dev, &msg);
- break;
-
- case VHOST_USER_SET_LOG_BASE:
- ret = vhost_user_set_log_base(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_LOG_FD:
- ret = vhost_user_set_log_fd(&dev, &msg);
- break;
-
- case VHOST_USER_SET_VRING_NUM:
- ret = vhost_user_set_vring_num(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_ADDR:
- ret = vhost_user_set_vring_addr(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_BASE:
- ret = vhost_user_set_vring_base(&dev, &msg);
- break;
- case VHOST_USER_GET_VRING_BASE:
- ret = vhost_user_get_vring_base(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
+ int request = msg.request.master;
+ if (vhost_message_handlers[request]) {
+ ret = vhost_message_handlers[request](&dev, &msg);
- case VHOST_USER_SET_VRING_KICK:
- ret = vhost_user_set_vring_kick(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_CALL:
- ret = vhost_user_set_vring_call(&dev, &msg);
- b
[dpdk-dev] [PATCH v2 1/5] vhost: unify VhostUserMsg usage
Use the typedef version of struct VhostUserMsg. Also unify the related
parameter name.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 50 +
1 file changed, 25 insertions(+), 25 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index dc53ff712..d51616695 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -778,10 +778,10 @@ vhost_memory_changed(struct VhostUserMemory *new,
}
static int
-vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_mem_table(struct virtio_net **pdev, VhostUserMsg *msg)
{
struct virtio_net *dev = *pdev;
- struct VhostUserMemory memory = pmsg->payload.memory;
+ struct VhostUserMemory memory = msg->payload.memory;
struct rte_vhost_mem_region *reg;
void *mmap_addr;
uint64_t mmap_size;
@@ -802,7 +802,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
"(%d) memory regions not changed\n", dev->vid);
for (i = 0; i < memory.nregions; i++)
- close(pmsg->fds[i]);
+ close(msg->fds[i]);
return 0;
}
@@ -838,7 +838,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
dev->mem->nregions = memory.nregions;
for (i = 0; i < memory.nregions; i++) {
- fd = pmsg->fds[i];
+ fd = msg->fds[i];
reg = &dev->mem->regions[i];
reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
@@ -987,16 +987,16 @@ virtio_is_ready(struct virtio_net *dev)
}
static void
-vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_call(struct virtio_net *dev, VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring call idx:%d file:%d\n", file.index, file.fd);
@@ -1008,17 +1008,17 @@ vhost_user_set_vring_call(struct virtio_net *dev,
struct VhostUserMsg *pmsg)
}
static void
-vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_kick(struct virtio_net **pdev, VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
struct virtio_net *dev = *pdev;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring kick idx:%d file:%d\n", file.index, file.fd);
@@ -1145,7 +1145,7 @@ vhost_user_set_vring_enable(struct virtio_net *dev,
static void
vhost_user_get_protocol_features(struct virtio_net *dev,
-struct VhostUserMsg *msg)
+VhostUserMsg *msg)
{
uint64_t features, protocol_features;
@@ -1176,7 +1176,7 @@ vhost_user_set_protocol_features(struct virtio_net *dev,
}
static int
-vhost_user_set_log_base(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_set_log_base(struct virtio_net *dev, VhostUserMsg *msg)
{
int fd = msg->fds[0];
uint64_t size, off;
@@ -1243,7 +1243,7 @@ vhost_user_set_log_base(struct virtio_net *dev, struct
VhostUserMsg *msg)
* a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
*/
static int
-vhost_user_send_rarp(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_send_rarp(struct virtio_net *dev, VhostUserMsg *msg)
{
uint8_t *mac = (uint8_t *)&msg->payload.u64;
struct rte_vdpa_device *vdpa_dev;
@@ -1272,7 +1272,7 @@ vhost_user_send_rarp(struct virtio_net *dev, struct
VhostUserMsg *msg)
}
static int
-vhost_user_net_set_mtu(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_net_set_mtu(struct virtio_net *dev, VhostUserMsg *msg)
{
if (msg->payload.u64 < VIRTIO_MIN_MTU ||
msg->payload.u64 > VIRTIO_MAX_MTU) {
@@ -1288,7 +1288,7 @@ vhost_user_net_se
[dpdk-dev] [PATCH v2 0/5] vhost_user.c code cleanup
vhost: vhost_user.c code cleanup This patchesries introduce a set of code redesigns in vhost_user.c. The goal is to unify and simplify vhost-user message handling. The patches do not intend to introduce any functional changes. v2 changes: - Fix the comments by Tiwei Bie - Keep the old behavior - Fall through when the callback returns VH_RESULT_ERR - Fall through if the request is out of range --- Nikolay Nikolaev (5): vhost: unify VhostUserMsg usage vhost: make message handling functions prepare the reply vhost: handle unsupported message types in functions vhost: unify message handling function signature vhost: message handling implemented as a callback array lib/librte_vhost/vhost_user.c | 392 ++--- 1 file changed, 208 insertions(+), 184 deletions(-) -- Signature
[dpdk-dev] [PATCH v2 3/5] vhost: handle unsupported message types in functions
Add new functions to handle the unsupported vhost message types:
- vhost_user_set_vring_err
- vhost_user_set_log_fd
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 22 +-
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index e97b2d563..b408460f0 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1015,6 +1015,14 @@ vhost_user_set_vring_call(struct virtio_net *dev,
VhostUserMsg *msg)
vq->callfd = file.fd;
}
+static void vhost_user_set_vring_err(struct virtio_net *dev __rte_unused,
+ VhostUserMsg *msg)
+{
+ if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+}
+
static void
vhost_user_set_vring_kick(struct virtio_net **pdev, VhostUserMsg *msg)
{
@@ -1246,6 +1254,13 @@ vhost_user_set_log_base(struct virtio_net *dev,
VhostUserMsg *msg)
return 0;
}
+static void
+vhost_user_set_log_fd(struct virtio_net *dev __rte_unused, VhostUserMsg *msg)
+{
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+}
+
/*
* An rarp packet is constructed and broadcasted to notify switches about
* the new location of the migrated VM, so that packets from outside will
@@ -1689,8 +1704,7 @@ vhost_user_msg_handler(int vid, int fd)
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+ vhost_user_set_log_fd(dev, &msg);
break;
case VHOST_USER_SET_VRING_NUM:
@@ -1716,9 +1730,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_SET_VRING_ERR:
- if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+ vhost_user_set_vring_err(dev, &msg);
break;
case VHOST_USER_GET_QUEUE_NUM:
[dpdk-dev] [PATCH v2 4/5] vhost: unify message handling function signature
Each vhost-user message handling function will return an int result
which is described in the new enum vh_result: error, OK and reply.
All functions will now have two arguments, virtio_net double pointer
and VhostUserMsg pointer.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 219 -
1 file changed, 130 insertions(+), 89 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index b408460f0..6b39d1e30 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -71,6 +71,16 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
};
+/* The possible results of a message handling function */
+enum vh_result {
+ /* Message handling failed */
+ VH_RESULT_ERR = -1,
+ /* Message handling successful */
+ VH_RESULT_OK= 0,
+ /* Message handling successful and reply prepared */
+ VH_RESULT_REPLY = 1,
+};
+
static uint64_t
get_blk_size(int fd)
{
@@ -127,27 +137,31 @@ vhost_backend_cleanup(struct virtio_net *dev)
* the device hasn't been initialised.
*/
static int
-vhost_user_set_owner(void)
+vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
+ VhostUserMsg * msg __rte_unused)
{
- return 0;
+ return VH_RESULT_OK;
}
static int
-vhost_user_reset_owner(struct virtio_net *dev)
+vhost_user_reset_owner(struct virtio_net **pdev,
+ VhostUserMsg * msg __rte_unused)
{
+ struct virtio_net *dev = *pdev;
vhost_destroy_device_notify(dev);
cleanup_device(dev, 0);
reset_device(dev);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The features that we support are requested.
*/
-static uint64_t
-vhost_user_get_features(struct virtio_net *dev, VhostUserMsg *msg)
+static int
+vhost_user_get_features(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
@@ -155,15 +169,16 @@ vhost_user_get_features(struct virtio_net *dev,
VhostUserMsg *msg)
msg->payload.u64 = features;
msg->size = sizeof(msg->payload.u64);
- return features;
+ return VH_RESULT_REPLY;
}
/*
* The queue number that we support are requested.
*/
-static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev, VhostUserMsg *msg)
+static int
+vhost_user_get_queue_num(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
@@ -171,15 +186,17 @@ vhost_user_get_queue_num(struct virtio_net *dev,
VhostUserMsg *msg)
msg->payload.u64 = (uint64_t)queue_num;
msg->size = sizeof(msg->payload.u64);
- return queue_num;
+ return VH_RESULT_REPLY;
}
/*
* We receive the negotiated features supported by us and the virtio device.
*/
static int
-vhost_user_set_features(struct virtio_net *dev, uint64_t features)
+vhost_user_set_features(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
+ uint64_t features = msg->payload.u64;
uint64_t vhost_features = 0;
struct rte_vdpa_device *vdpa_dev;
int did = -1;
@@ -189,12 +206,12 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) received invalid negotiated features.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->flags & VIRTIO_DEV_RUNNING) {
if (dev->features == features)
- return 0;
+ return VH_RESULT_OK;
/*
* Error out if master tries to change features while device is
@@ -205,7 +222,7 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) features changed while device is
running.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->notify_ops->features_changed)
@@ -250,16 +267,17 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
if (vdpa_dev && vdpa_dev->ops->set_features)
vdpa_dev->ops->set_features(dev->vid);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The virtio device sends us the size of the descriptor ring.
*/
static int
-vhost_user_set_vring_num(struct virtio_net *dev,
+vhost_user_set_vring_num(struct virtio_net **pdev,
[dpdk-dev] [PATCH v2 2/5] vhost: make message handling functions prepare the reply
As VhostUserMsg structure is resued to generate the reply, move the
relevant fields update into the respective message handling functions.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 26 --
1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index d51616695..e97b2d563 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -146,11 +146,15 @@ vhost_user_reset_owner(struct virtio_net *dev)
* The features that we support are requested.
*/
static uint64_t
-vhost_user_get_features(struct virtio_net *dev)
+vhost_user_get_features(struct virtio_net *dev, VhostUserMsg *msg)
{
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
+
+ msg->payload.u64 = features;
+ msg->size = sizeof(msg->payload.u64);
+
return features;
}
@@ -158,11 +162,15 @@ vhost_user_get_features(struct virtio_net *dev)
* The queue number that we support are requested.
*/
static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev)
+vhost_user_get_queue_num(struct virtio_net *dev, VhostUserMsg *msg)
{
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
+
+ msg->payload.u64 = (uint64_t)queue_num;
+ msg->size = sizeof(msg->payload.u64);
+
return queue_num;
}
@@ -1109,6 +1117,8 @@ vhost_user_get_vring_base(struct virtio_net *dev,
rte_free(vq->batch_copy_elems);
vq->batch_copy_elems = NULL;
+ msg->size = sizeof(msg->payload.state);
+
return 0;
}
@@ -1231,6 +1241,8 @@ vhost_user_set_log_base(struct virtio_net *dev,
VhostUserMsg *msg)
dev->log_base = dev->log_addr + off;
dev->log_size = size;
+ msg->size = sizeof(msg->payload.u64);
+
return 0;
}
@@ -1644,8 +1656,7 @@ vhost_user_msg_handler(int vid, int fd)
switch (msg.request.master) {
case VHOST_USER_GET_FEATURES:
- msg.payload.u64 = vhost_user_get_features(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_features(dev, &msg);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_FEATURES:
@@ -1675,9 +1686,6 @@ vhost_user_msg_handler(int vid, int fd)
case VHOST_USER_SET_LOG_BASE:
vhost_user_set_log_base(dev, &msg);
-
- /* it needs a reply */
- msg.size = sizeof(msg.payload.u64);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
@@ -1697,7 +1705,6 @@ vhost_user_msg_handler(int vid, int fd)
case VHOST_USER_GET_VRING_BASE:
vhost_user_get_vring_base(dev, &msg);
- msg.size = sizeof(msg.payload.state);
send_vhost_reply(fd, &msg);
break;
@@ -1715,8 +1722,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_GET_QUEUE_NUM:
- msg.payload.u64 = (uint64_t)vhost_user_get_queue_num(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_queue_num(dev, &msg);
send_vhost_reply(fd, &msg);
break;
[dpdk-dev] [PATCH v2 5/5] vhost: message handling implemented as a callback array
Introduce vhost_message_handlers, which maps the message request
type to the message handler. Then replace the switch construct
with a map and call.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 143 +++--
1 file changed, 54 insertions(+), 89 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 6b39d1e30..1b164df27 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1466,6 +1466,34 @@ vhost_user_iotlb_msg(struct virtio_net **pdev,
VhostUserMsg *msg)
return VH_RESULT_OK;
}
+typedef int (*vhost_message_handler_t)(struct virtio_net **pdev, VhostUserMsg
* msg);
+static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
+ [VHOST_USER_NONE] = NULL,
+ [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
+ [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
+ [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
+ [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
+ [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
+ [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
+ [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
+ [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
+ [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
+ [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
+ [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
+ [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
+ [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
+ [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
+ [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
+ [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
+ [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
+ [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
+ [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
+ [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
+ [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
+ [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
+};
+
+
/* return bytes# of read on success or negative val on failure. */
static int
read_vhost_message(int sockfd, VhostUserMsg *msg)
@@ -1618,6 +1646,7 @@ vhost_user_msg_handler(int vid, int fd)
int ret;
int unlock_required = 0;
uint32_t skip_master = 0;
+ int request;
dev = get_device(vid);
if (dev == NULL)
@@ -1710,97 +1739,33 @@ vhost_user_msg_handler(int vid, int fd)
goto skip_to_post_handle;
}
- switch (msg.request.master) {
- case VHOST_USER_GET_FEATURES:
- ret = vhost_user_get_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_FEATURES:
- ret = vhost_user_set_features(&dev, &msg);
- if (ret)
- return -1;
- break;
-
- case VHOST_USER_GET_PROTOCOL_FEATURES:
- ret = vhost_user_get_protocol_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_PROTOCOL_FEATURES:
- ret = vhost_user_set_protocol_features(&dev, &msg);
- break;
-
- case VHOST_USER_SET_OWNER:
- ret = vhost_user_set_owner(&dev, &msg);
- break;
- case VHOST_USER_RESET_OWNER:
- ret = vhost_user_reset_owner(&dev, &msg);
- break;
-
- case VHOST_USER_SET_MEM_TABLE:
- ret = vhost_user_set_mem_table(&dev, &msg);
- break;
-
- case VHOST_USER_SET_LOG_BASE:
- ret = vhost_user_set_log_base(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_LOG_FD:
- ret = vhost_user_set_log_fd(&dev, &msg);
- break;
-
- case VHOST_USER_SET_VRING_NUM:
- ret = vhost_user_set_vring_num(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_ADDR:
- ret = vhost_user_set_vring_addr(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_BASE:
- ret = vhost_user_set_vring_base(&dev, &msg);
- break;
-
- case VHOST_USER_GET_VRING_BASE:
- ret = vhost_user_get_vring_base(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
-
- case VHOST_USER_SET_VRING_KICK:
- ret = vhost_user_set_vring_kick(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_CALL:
- ret = vhost_user_set_vring_call(&dev, &msg);
- break;
-
Re: [dpdk-dev] [PATCH v2 0/5] vhost_user.c code cleanup
Hello Maxime, I'll rebase and fix Ilya's comments. Thanks for the reviews. regards, Nikolay Nikolaev On Tue, Sep 11, 2018 at 12:38 PM Maxime Coquelin wrote: > Hi Nikolay, > > On 07/19/2018 09:13 PM, Nikolay Nikolaev wrote: > > vhost: vhost_user.c code cleanup > > > > This patchesries introduce a set of code redesigns in vhost_user.c. > > > > The goal is to unify and simplify vhost-user message handling. The > > patches do not intend to introduce any functional changes. > > > > v2 changes: > > - Fix the comments by Tiwei Bie > > - Keep the old behavior > > - Fall through when the callback returns VH_RESULT_ERR > > - Fall through if the request is out of range > > > > --- > > > > Nikolay Nikolaev (5): > >vhost: unify VhostUserMsg usage > >vhost: make message handling functions prepare the reply > >vhost: handle unsupported message types in functions > >vhost: unify message handling function signature > >vhost: message handling implemented as a callback array > > > > > > lib/librte_vhost/vhost_user.c | 392 > ++--- > > 1 file changed, 208 insertions(+), 184 deletions(-) > > > > -- > > Signature > > > > Could you please rebase and fix the series (see Iliya comments) on top > of git://dpdk.org/next/dpdk-next-virtio master branch? > > Thanks, > Maxime >
[dpdk-dev] [PATCH v3 2/5] vhost: make message handling functions prepare the reply
As VhostUserMsg structure is reused to generate the reply, move the
relevant fields update into the respective message handling functions.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 24
1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index b05b57670..3a00d53cf 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -146,11 +146,15 @@ vhost_user_reset_owner(struct virtio_net *dev)
* The features that we support are requested.
*/
static uint64_t
-vhost_user_get_features(struct virtio_net *dev)
+vhost_user_get_features(struct virtio_net *dev, VhostUserMsg *msg)
{
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
+
+ msg->payload.u64 = features;
+ msg->size = sizeof(msg->payload.u64);
+
return features;
}
@@ -158,11 +162,15 @@ vhost_user_get_features(struct virtio_net *dev)
* The queue number that we support are requested.
*/
static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev)
+vhost_user_get_queue_num(struct virtio_net *dev, VhostUserMsg *msg)
{
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
+
+ msg->payload.u64 = (uint64_t)queue_num;
+ msg->size = sizeof(msg->payload.u64);
+
return queue_num;
}
@@ -1117,6 +1125,8 @@ vhost_user_get_vring_base(struct virtio_net *dev,
rte_free(vq->batch_copy_elems);
vq->batch_copy_elems = NULL;
+ msg->size = sizeof(msg->payload.state);
+
return 0;
}
@@ -1244,6 +1254,8 @@ vhost_user_set_log_base(struct virtio_net *dev,
VhostUserMsg *msg)
dev->log_base = dev->log_addr + off;
dev->log_size = size;
+ msg->size = sizeof(msg->payload.u64);
+
return 0;
}
@@ -1657,8 +1669,7 @@ vhost_user_msg_handler(int vid, int fd)
switch (msg.request.master) {
case VHOST_USER_GET_FEATURES:
- msg.payload.u64 = vhost_user_get_features(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_features(dev, &msg);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_FEATURES:
@@ -1689,7 +1700,6 @@ vhost_user_msg_handler(int vid, int fd)
if (ret)
goto skip_to_reply;
/* it needs a reply */
- msg.size = sizeof(msg.payload.u64);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
@@ -1711,7 +1721,6 @@ vhost_user_msg_handler(int vid, int fd)
ret = vhost_user_get_vring_base(dev, &msg);
if (ret)
goto skip_to_reply;
- msg.size = sizeof(msg.payload.state);
send_vhost_reply(fd, &msg);
break;
@@ -1729,8 +1738,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_GET_QUEUE_NUM:
- msg.payload.u64 = (uint64_t)vhost_user_get_queue_num(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_queue_num(dev, &msg);
send_vhost_reply(fd, &msg);
break;
[dpdk-dev] [PATCH v3 0/5] vhost: vhost_user.c code cleanup
vhost: vhost_user.c code cleanup This patchesries introduces a set of code redesigns in vhost_user.c. The goal is to unify and simplify vhost-user message handling. The patches do not intend to make any functional changes. v3 changes: - rebased on top of git://dpdk.org/next/dpdk-next-virtio dead0602 - introduce VH_RESULT_FATAL (Maxime Coquelin) - vhost_user_set_features return VH_RESULT_FATAL on failure. This allows keeping the propagate error logic (Ilya Maximets) - fixed vhost_user_set_vring_kick and vhost_user_set_protocol_features return VH_RESULT_ERR upon failure - fixed missing break in case VH_RESULT_ERR (Ilya Maximets) - fixed a type on the description of 2/5 patch (Maxime Coquelin) v2 changes: - Fix the comments by Tiwei Bie - Keep the old behavior - Fall through when the callback returns VH_RESULT_ERR - Fall through if the request is out of range --- Nikolay Nikolaev (5): vhost: unify VhostUserMsg usage vhost: make message handling functions prepare the reply vhost: handle unsupported message types in functions vhost: unify message handling function signature vhost: message handling implemented as a callback array lib/librte_vhost/vhost_user.c | 402 ++--- 1 file changed, 216 insertions(+), 186 deletions(-) -- Signature
[dpdk-dev] [PATCH v3 1/5] vhost: unify VhostUserMsg usage
Use the typedef version of struct VhostUserMsg. Also unify the related
parameter name.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 50 +
1 file changed, 25 insertions(+), 25 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 63d145b2d..b05b57670 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -780,10 +780,10 @@ vhost_memory_changed(struct VhostUserMemory *new,
}
static int
-vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_mem_table(struct virtio_net **pdev, VhostUserMsg *msg)
{
struct virtio_net *dev = *pdev;
- struct VhostUserMemory memory = pmsg->payload.memory;
+ struct VhostUserMemory memory = msg->payload.memory;
struct rte_vhost_mem_region *reg;
void *mmap_addr;
uint64_t mmap_size;
@@ -804,7 +804,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
"(%d) memory regions not changed\n", dev->vid);
for (i = 0; i < memory.nregions; i++)
- close(pmsg->fds[i]);
+ close(msg->fds[i]);
return 0;
}
@@ -845,7 +845,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
dev->mem->nregions = memory.nregions;
for (i = 0; i < memory.nregions; i++) {
- fd = pmsg->fds[i];
+ fd = msg->fds[i];
reg = &dev->mem->regions[i];
reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
@@ -994,16 +994,16 @@ virtio_is_ready(struct virtio_net *dev)
}
static void
-vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_call(struct virtio_net *dev, VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring call idx:%d file:%d\n", file.index, file.fd);
@@ -1015,17 +1015,17 @@ vhost_user_set_vring_call(struct virtio_net *dev,
struct VhostUserMsg *pmsg)
}
static int
-vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_kick(struct virtio_net **pdev, VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
struct virtio_net *dev = *pdev;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring kick idx:%d file:%d\n", file.index, file.fd);
@@ -1153,7 +1153,7 @@ vhost_user_set_vring_enable(struct virtio_net *dev,
static void
vhost_user_get_protocol_features(struct virtio_net *dev,
-struct VhostUserMsg *msg)
+VhostUserMsg *msg)
{
uint64_t features, protocol_features;
@@ -1189,7 +1189,7 @@ vhost_user_set_protocol_features(struct virtio_net *dev,
}
static int
-vhost_user_set_log_base(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_set_log_base(struct virtio_net *dev, VhostUserMsg *msg)
{
int fd = msg->fds[0];
uint64_t size, off;
@@ -1256,7 +1256,7 @@ vhost_user_set_log_base(struct virtio_net *dev, struct
VhostUserMsg *msg)
* a flag 'broadcast_rarp' to let rte_vhost_dequeue_burst() inject it.
*/
static int
-vhost_user_send_rarp(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_send_rarp(struct virtio_net *dev, VhostUserMsg *msg)
{
uint8_t *mac = (uint8_t *)&msg->payload.u64;
struct rte_vdpa_device *vdpa_dev;
@@ -1285,7 +1285,7 @@ vhost_user_send_rarp(struct virtio_net *dev, struct
VhostUserMsg *msg)
}
static int
-vhost_user_net_set_mtu(struct virtio_net *dev, struct VhostUserMsg *msg)
+vhost_user_net_set_mtu(struct virtio_net *dev, VhostUserMsg *msg)
{
if (msg->payload.u64 < VIRTIO_MIN_MTU ||
msg->payload.u64 > VIRTIO_MAX_MTU) {
@@ -1301,7 +1301,7 @@ vhost_user_net_se
[dpdk-dev] [PATCH v3 4/5] vhost: unify message handling function signature
Each vhost-user message handling function will return an int result
which is described in the new enum vh_result: error, OK and reply.
All functions will now have two arguments, virtio_net double pointer
and VhostUserMsg pointer.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 213 -
1 file changed, 126 insertions(+), 87 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index c38b0fd70..81c0396de 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -71,6 +71,16 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
};
+/* The possible results of a message handling function */
+enum vh_result {
+ /* Message handling failed */
+ VH_RESULT_ERR = -1,
+ /* Message handling successful */
+ VH_RESULT_OK= 0,
+ /* Message handling successful and reply prepared */
+ VH_RESULT_REPLY = 1,
+};
+
static uint64_t
get_blk_size(int fd)
{
@@ -127,27 +137,31 @@ vhost_backend_cleanup(struct virtio_net *dev)
* the device hasn't been initialised.
*/
static int
-vhost_user_set_owner(void)
+vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
+ VhostUserMsg * msg __rte_unused)
{
- return 0;
+ return VH_RESULT_OK;
}
static int
-vhost_user_reset_owner(struct virtio_net *dev)
+vhost_user_reset_owner(struct virtio_net **pdev,
+ VhostUserMsg * msg __rte_unused)
{
+ struct virtio_net *dev = *pdev;
vhost_destroy_device_notify(dev);
cleanup_device(dev, 0);
reset_device(dev);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The features that we support are requested.
*/
-static uint64_t
-vhost_user_get_features(struct virtio_net *dev, VhostUserMsg *msg)
+static int
+vhost_user_get_features(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
@@ -155,15 +169,16 @@ vhost_user_get_features(struct virtio_net *dev,
VhostUserMsg *msg)
msg->payload.u64 = features;
msg->size = sizeof(msg->payload.u64);
- return features;
+ return VH_RESULT_REPLY;
}
/*
* The queue number that we support are requested.
*/
-static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev, VhostUserMsg *msg)
+static int
+vhost_user_get_queue_num(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
@@ -171,15 +186,17 @@ vhost_user_get_queue_num(struct virtio_net *dev,
VhostUserMsg *msg)
msg->payload.u64 = (uint64_t)queue_num;
msg->size = sizeof(msg->payload.u64);
- return queue_num;
+ return VH_RESULT_REPLY;
}
/*
* We receive the negotiated features supported by us and the virtio device.
*/
static int
-vhost_user_set_features(struct virtio_net *dev, uint64_t features)
+vhost_user_set_features(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
+ uint64_t features = msg->payload.u64;
uint64_t vhost_features = 0;
struct rte_vdpa_device *vdpa_dev;
int did = -1;
@@ -189,12 +206,12 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) received invalid negotiated features.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->flags & VIRTIO_DEV_RUNNING) {
if (dev->features == features)
- return 0;
+ return VH_RESULT_OK;
/*
* Error out if master tries to change features while device is
@@ -205,7 +222,7 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) features changed while device is
running.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->notify_ops->features_changed)
@@ -250,16 +267,17 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
if (vdpa_dev && vdpa_dev->ops->set_features)
vdpa_dev->ops->set_features(dev->vid);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The virtio device sends us the size of the descriptor ring.
*/
static int
-vhost_user_set_vring_num(struct virtio_net *dev,
+vhost_user_set_vring_num(struct virtio_net **pdev,
[dpdk-dev] [PATCH v3 3/5] vhost: handle unsupported message types in functions
Add new functions to handle the unsupported vhost message types:
- vhost_user_set_vring_err
- vhost_user_set_log_fd
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 22 +-
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 3a00d53cf..c38b0fd70 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1022,6 +1022,14 @@ vhost_user_set_vring_call(struct virtio_net *dev,
VhostUserMsg *msg)
vq->callfd = file.fd;
}
+static void vhost_user_set_vring_err(struct virtio_net *dev __rte_unused,
+ VhostUserMsg *msg)
+{
+ if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+}
+
static int
vhost_user_set_vring_kick(struct virtio_net **pdev, VhostUserMsg *msg)
{
@@ -1259,6 +1267,13 @@ vhost_user_set_log_base(struct virtio_net *dev,
VhostUserMsg *msg)
return 0;
}
+static void
+vhost_user_set_log_fd(struct virtio_net *dev __rte_unused, VhostUserMsg *msg)
+{
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+}
+
/*
* An rarp packet is constructed and broadcasted to notify switches about
* the new location of the migrated VM, so that packets from outside will
@@ -1703,8 +1718,7 @@ vhost_user_msg_handler(int vid, int fd)
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+ vhost_user_set_log_fd(dev, &msg);
break;
case VHOST_USER_SET_VRING_NUM:
@@ -1732,9 +1746,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_SET_VRING_ERR:
- if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+ vhost_user_set_vring_err(dev, &msg);
break;
case VHOST_USER_GET_QUEUE_NUM:
[dpdk-dev] [PATCH v3 5/5] vhost: message handling implemented as a callback array
Introduce vhost_message_handlers, which maps the message request
type to the message handler. Then replace the switch construct
with a map and call.
Failing vhost_user_set_features is fatal and all processing should
stop immediately and propagate the error to the upper layers. Change
the code accordingly to reflect that.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 161 +
1 file changed, 66 insertions(+), 95 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 81c0396de..9004e1ac8 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -73,6 +73,8 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
/* The possible results of a message handling function */
enum vh_result {
+ /* Message handling failed with an unrecoverable error */
+ VH_RESULT_FATAL = -2,
/* Message handling failed */
VH_RESULT_ERR = -1,
/* Message handling successful */
@@ -206,7 +208,7 @@ vhost_user_set_features(struct virtio_net **pdev,
VhostUserMsg *msg)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) received invalid negotiated features.\n",
dev->vid);
- return VH_RESULT_ERR;
+ return VH_RESULT_FATAL;
}
if (dev->flags & VIRTIO_DEV_RUNNING) {
@@ -222,7 +224,7 @@ vhost_user_set_features(struct virtio_net **pdev,
VhostUserMsg *msg)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) features changed while device is
running.\n",
dev->vid);
- return VH_RESULT_ERR;
+ return VH_RESULT_FATAL;
}
if (dev->notify_ops->features_changed)
@@ -1477,6 +1479,34 @@ vhost_user_iotlb_msg(struct virtio_net **pdev,
VhostUserMsg *msg)
return VH_RESULT_OK;
}
+typedef int (*vhost_message_handler_t)(struct virtio_net **pdev, VhostUserMsg
* msg);
+static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
+ [VHOST_USER_NONE] = NULL,
+ [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
+ [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
+ [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
+ [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
+ [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
+ [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
+ [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
+ [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
+ [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
+ [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
+ [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
+ [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
+ [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
+ [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
+ [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
+ [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
+ [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
+ [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
+ [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
+ [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
+ [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
+ [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
+};
+
+
/* return bytes# of read on success or negative val on failure. */
static int
read_vhost_message(int sockfd, VhostUserMsg *msg)
@@ -1629,6 +1659,7 @@ vhost_user_msg_handler(int vid, int fd)
int ret;
int unlock_required = 0;
uint32_t skip_master = 0;
+ int request;
dev = get_device(vid);
if (dev == NULL)
@@ -1721,100 +1752,40 @@ vhost_user_msg_handler(int vid, int fd)
goto skip_to_post_handle;
}
- switch (msg.request.master) {
- case VHOST_USER_GET_FEATURES:
- ret = vhost_user_get_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_FEATURES:
- ret = vhost_user_set_features(&dev, &msg);
- break;
-
- case VHOST_USER_GET_PROTOCOL_FEATURES:
- ret = vhost_user_get_protocol_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_PROTOCOL_FEATURES:
- ret = vhost_user_set_protocol_features(&dev, &msg);
- break;
-
- case VHOST_USER_SET_OWNER:
- ret = vhost_user_set_owner(&dev, &msg);
- break;
- case VHOST_USER_RESET_OWNER:
- ret = vhost_user_reset_owner(&dev,
Re: [dpdk-dev] [PATCH v3 5/5] vhost: message handling implemented as a callback array
On Wed, Sep 19, 2018 at 10:37 AM Maxime Coquelin
wrote:
>
>
>
> On 09/15/2018 07:20 AM, Nikolay Nikolaev wrote:
> > Introduce vhost_message_handlers, which maps the message request
> > type to the message handler. Then replace the switch construct
> > with a map and call.
> >
> > Failing vhost_user_set_features is fatal and all processing should
> > stop immediately and propagate the error to the upper layers. Change
> > the code accordingly to reflect that.
> >
> > Signed-off-by: Nikolay Nikolaev
> > ---
> > lib/librte_vhost/vhost_user.c | 161
> > +
> > 1 file changed, 66 insertions(+), 95 deletions(-)
> >
> > diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
> > index 81c0396de..9004e1ac8 100644
> > --- a/lib/librte_vhost/vhost_user.c
> > +++ b/lib/librte_vhost/vhost_user.c
> > @@ -73,6 +73,8 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
> >
> > /* The possible results of a message handling function */
> > enum vh_result {
> > + /* Message handling failed with an unrecoverable error */
> > + VH_RESULT_FATAL = -2,
> > /* Message handling failed */
> > VH_RESULT_ERR = -1,
> > /* Message handling successful */
> > @@ -206,7 +208,7 @@ vhost_user_set_features(struct virtio_net **pdev,
> > VhostUserMsg *msg)
> > RTE_LOG(ERR, VHOST_CONFIG,
> > "(%d) received invalid negotiated features.\n",
> > dev->vid);
> > - return VH_RESULT_ERR;
> > + return VH_RESULT_FATAL;
> > }
> >
> > if (dev->flags & VIRTIO_DEV_RUNNING) {
> > @@ -222,7 +224,7 @@ vhost_user_set_features(struct virtio_net **pdev,
> > VhostUserMsg *msg)
> > RTE_LOG(ERR, VHOST_CONFIG,
> > "(%d) features changed while device is
> > running.\n",
> > dev->vid);
> > - return VH_RESULT_ERR;
> > + return VH_RESULT_FATAL;
> > }
> >
> > if (dev->notify_ops->features_changed)
> > @@ -1477,6 +1479,34 @@ vhost_user_iotlb_msg(struct virtio_net **pdev,
> > VhostUserMsg *msg)
> > return VH_RESULT_OK;
> > }
> >
> > +typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
> > VhostUserMsg * msg);
> > +static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
> > + [VHOST_USER_NONE] = NULL,
> > + [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
> > + [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
> > + [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
> > + [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
> > + [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
> > + [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
> > + [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
> > + [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
> > + [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
> > + [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
> > + [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
> > + [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
> > + [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
> > + [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
> > + [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
> > + [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
> > + [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
> > + [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
> > + [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
> > + [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
> > + [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
> > + [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
> > +};
> > +
> > +
> > /* return bytes# of read on success or negative val on failure. */
> > static int
> > read_vhost_message(int sockfd, VhostUserMsg *msg)
> > @@ -1629,6 +1659,7 @@ vhost_user_msg_handler(int vid, int fd)
> > int ret;
> > int unlock_required = 0;
> > uint32_t skip_master = 0;
> > + int request;
> >
> > dev = get_device(vid);
> > if (dev == NULL)
> > @@ -1721,100 +1752,40 @@ vhost_user_msg_handler(int vid, int fd)
&
[dpdk-dev] [PATCH v4 1/5] vhost: unify struct VhostUserMsg usage
Do not use the typedef version of struct VhostUserMsg. Also unify the
related parameter name.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 41 +
1 file changed, 21 insertions(+), 20 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 63d145b2d..505db3bfc 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -250,7 +250,7 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
*/
static int
vhost_user_set_vring_num(struct virtio_net *dev,
-VhostUserMsg *msg)
+struct VhostUserMsg *msg)
{
struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
@@ -611,7 +611,7 @@ translate_ring_addresses(struct virtio_net *dev, int
vq_index)
* This function then converts these to our address space.
*/
static int
-vhost_user_set_vring_addr(struct virtio_net **pdev, VhostUserMsg *msg)
+vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
struct vhost_virtqueue *vq;
struct vhost_vring_addr *addr = &msg->payload.addr;
@@ -648,7 +648,7 @@ vhost_user_set_vring_addr(struct virtio_net **pdev,
VhostUserMsg *msg)
*/
static int
vhost_user_set_vring_base(struct virtio_net *dev,
- VhostUserMsg *msg)
+ struct VhostUserMsg *msg)
{
dev->virtqueue[msg->payload.state.index]->last_used_idx =
msg->payload.state.num;
@@ -780,10 +780,10 @@ vhost_memory_changed(struct VhostUserMemory *new,
}
static int
-vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
struct virtio_net *dev = *pdev;
- struct VhostUserMemory memory = pmsg->payload.memory;
+ struct VhostUserMemory memory = msg->payload.memory;
struct rte_vhost_mem_region *reg;
void *mmap_addr;
uint64_t mmap_size;
@@ -804,7 +804,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
"(%d) memory regions not changed\n", dev->vid);
for (i = 0; i < memory.nregions; i++)
- close(pmsg->fds[i]);
+ close(msg->fds[i]);
return 0;
}
@@ -845,7 +845,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
dev->mem->nregions = memory.nregions;
for (i = 0; i < memory.nregions; i++) {
- fd = pmsg->fds[i];
+ fd = msg->fds[i];
reg = &dev->mem->regions[i];
reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
@@ -994,16 +994,16 @@ virtio_is_ready(struct virtio_net *dev)
}
static void
-vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring call idx:%d file:%d\n", file.index, file.fd);
@@ -1015,17 +1015,17 @@ vhost_user_set_vring_call(struct virtio_net *dev,
struct VhostUserMsg *pmsg)
}
static int
-vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
struct virtio_net *dev = *pdev;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring kick idx:%d file:%d\n", file.index, file.fd);
@@ -1073,7 +1073,7 @@ free_zmbufs(struct vhost_virtqueue *vq)
*/
static int
vhost_user_get_vring_base(struct virtio_net *dev,
- VhostUserMsg *msg)
+ struct VhostUserMsg *msg)
{
struct vhost_virtqueue *vq = dev->virtque
[dpdk-dev] [PATCH v4 0/5] vhost: vhost_user.c code cleanup
vhost: vhost_user.c code cleanup This patchesries introduce a set of code redesigns in vhost_user.c. The goal is to unify and simplify vhost-user message handling. The patches do not intend to introduce any functional changes. v4 changes: - use struct VhostUserMsg as the coding style guide suggests (Anatoly Burakov) - VH_RESULT_FATAL is removed as not needed anymore (Maxime Coquelin) v3 changes: - rebased on top of git://dpdk.org/next/dpdk-next-virtio dead0602 - introduce VH_RESULT_FATAL (Maxime Coquelin) - vhost_user_set_features return VH_RESULT_FATAL on failure. This allows keeping the propagate error logic (Ilya Maximets) - fixed vhost_user_set_vring_kick and vhost_user_set_protocol_features return VH_RESULT_ERR upon failure - fixed missing break in case VH_RESULT_ERR (Ilya Maximets) - fixed a type on the description of 2/5 patch (Maxime Coquelin) v2 changes: - Fix the comments by Tiwei Bie - Keep the old behavior - Fall through when the callback returns VH_RESULT_ERR - Fall through if the request is out of range --- Nikolay Nikolaev (5): vhost: unify struct VhostUserMsg usage vhost: make message handling functions prepare the reply vhost: handle unsupported message types in functions vhost: unify message handling function signature vhost: message handling implemented as a callback array lib/librte_vhost/vhost_user.c | 393 ++--- 1 file changed, 208 insertions(+), 185 deletions(-) -- Signature
[dpdk-dev] [PATCH v4 3/5] vhost: handle unsupported message types in functions
Add new functions to handle the unsupported vhost message types:
- vhost_user_set_vring_err
- vhost_user_set_log_fd
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 22 +-
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index b20aa6adc..1627d594e 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1022,6 +1022,14 @@ vhost_user_set_vring_call(struct virtio_net *dev, struct
VhostUserMsg *msg)
vq->callfd = file.fd;
}
+static void vhost_user_set_vring_err(struct virtio_net *dev __rte_unused,
+ VhostUserMsg *msg)
+{
+ if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+}
+
static int
vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
@@ -1259,6 +1267,13 @@ vhost_user_set_log_base(struct virtio_net *dev, struct
VhostUserMsg *msg)
return 0;
}
+static void
+vhost_user_set_log_fd(struct virtio_net *dev __rte_unused, VhostUserMsg *msg)
+{
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+}
+
/*
* An rarp packet is constructed and broadcasted to notify switches about
* the new location of the migrated VM, so that packets from outside will
@@ -1704,8 +1719,7 @@ vhost_user_msg_handler(int vid, int fd)
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+ vhost_user_set_log_fd(dev, &msg);
break;
case VHOST_USER_SET_VRING_NUM:
@@ -1733,9 +1747,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_SET_VRING_ERR:
- if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+ vhost_user_set_vring_err(dev, &msg);
break;
case VHOST_USER_GET_QUEUE_NUM:
[dpdk-dev] [PATCH v4 2/5] vhost: make message handling functions prepare the reply
As VhostUserMsg structure is reused to generate the reply, move the
relevant fields update into the respective message handling functions.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 24
1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 505db3bfc..b20aa6adc 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -146,11 +146,15 @@ vhost_user_reset_owner(struct virtio_net *dev)
* The features that we support are requested.
*/
static uint64_t
-vhost_user_get_features(struct virtio_net *dev)
+vhost_user_get_features(struct virtio_net *dev, VhostUserMsg *msg)
{
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
+
+ msg->payload.u64 = features;
+ msg->size = sizeof(msg->payload.u64);
+
return features;
}
@@ -158,11 +162,15 @@ vhost_user_get_features(struct virtio_net *dev)
* The queue number that we support are requested.
*/
static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev)
+vhost_user_get_queue_num(struct virtio_net *dev, VhostUserMsg *msg)
{
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
+
+ msg->payload.u64 = (uint64_t)queue_num;
+ msg->size = sizeof(msg->payload.u64);
+
return queue_num;
}
@@ -1117,6 +1125,8 @@ vhost_user_get_vring_base(struct virtio_net *dev,
rte_free(vq->batch_copy_elems);
vq->batch_copy_elems = NULL;
+ msg->size = sizeof(msg->payload.state);
+
return 0;
}
@@ -1244,6 +1254,8 @@ vhost_user_set_log_base(struct virtio_net *dev, struct
VhostUserMsg *msg)
dev->log_base = dev->log_addr + off;
dev->log_size = size;
+ msg->size = sizeof(msg->payload.u64);
+
return 0;
}
@@ -1658,8 +1670,7 @@ vhost_user_msg_handler(int vid, int fd)
switch (msg.request.master) {
case VHOST_USER_GET_FEATURES:
- msg.payload.u64 = vhost_user_get_features(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_features(dev, &msg);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_FEATURES:
@@ -1690,7 +1701,6 @@ vhost_user_msg_handler(int vid, int fd)
if (ret)
goto skip_to_reply;
/* it needs a reply */
- msg.size = sizeof(msg.payload.u64);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
@@ -1712,7 +1722,6 @@ vhost_user_msg_handler(int vid, int fd)
ret = vhost_user_get_vring_base(dev, &msg);
if (ret)
goto skip_to_reply;
- msg.size = sizeof(msg.payload.state);
send_vhost_reply(fd, &msg);
break;
@@ -1730,8 +1739,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_GET_QUEUE_NUM:
- msg.payload.u64 = (uint64_t)vhost_user_get_queue_num(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_queue_num(dev, &msg);
send_vhost_reply(fd, &msg);
break;
[dpdk-dev] [PATCH v4 4/5] vhost: unify message handling function signature
Each vhost-user message handling function will return an int result
which is described in the new enum vh_result: error, OK and reply.
All functions will now have two arguments, virtio_net double pointer
and VhostUserMsg pointer.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 213 -
1 file changed, 126 insertions(+), 87 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 1627d594e..051740477 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -71,6 +71,16 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
};
+/* The possible results of a message handling function */
+enum vh_result {
+ /* Message handling failed */
+ VH_RESULT_ERR = -1,
+ /* Message handling successful */
+ VH_RESULT_OK= 0,
+ /* Message handling successful and reply prepared */
+ VH_RESULT_REPLY = 1,
+};
+
static uint64_t
get_blk_size(int fd)
{
@@ -127,27 +137,31 @@ vhost_backend_cleanup(struct virtio_net *dev)
* the device hasn't been initialised.
*/
static int
-vhost_user_set_owner(void)
+vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
+ VhostUserMsg * msg __rte_unused)
{
- return 0;
+ return VH_RESULT_OK;
}
static int
-vhost_user_reset_owner(struct virtio_net *dev)
+vhost_user_reset_owner(struct virtio_net **pdev,
+ VhostUserMsg * msg __rte_unused)
{
+ struct virtio_net *dev = *pdev;
vhost_destroy_device_notify(dev);
cleanup_device(dev, 0);
reset_device(dev);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The features that we support are requested.
*/
-static uint64_t
-vhost_user_get_features(struct virtio_net *dev, VhostUserMsg *msg)
+static int
+vhost_user_get_features(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
@@ -155,15 +169,16 @@ vhost_user_get_features(struct virtio_net *dev,
VhostUserMsg *msg)
msg->payload.u64 = features;
msg->size = sizeof(msg->payload.u64);
- return features;
+ return VH_RESULT_REPLY;
}
/*
* The queue number that we support are requested.
*/
-static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev, VhostUserMsg *msg)
+static int
+vhost_user_get_queue_num(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
@@ -171,15 +186,17 @@ vhost_user_get_queue_num(struct virtio_net *dev,
VhostUserMsg *msg)
msg->payload.u64 = (uint64_t)queue_num;
msg->size = sizeof(msg->payload.u64);
- return queue_num;
+ return VH_RESULT_REPLY;
}
/*
* We receive the negotiated features supported by us and the virtio device.
*/
static int
-vhost_user_set_features(struct virtio_net *dev, uint64_t features)
+vhost_user_set_features(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
+ uint64_t features = msg->payload.u64;
uint64_t vhost_features = 0;
struct rte_vdpa_device *vdpa_dev;
int did = -1;
@@ -189,12 +206,12 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) received invalid negotiated features.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->flags & VIRTIO_DEV_RUNNING) {
if (dev->features == features)
- return 0;
+ return VH_RESULT_OK;
/*
* Error out if master tries to change features while device is
@@ -205,7 +222,7 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) features changed while device is
running.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->notify_ops->features_changed)
@@ -250,16 +267,17 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
if (vdpa_dev && vdpa_dev->ops->set_features)
vdpa_dev->ops->set_features(dev->vid);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The virtio device sends us the size of the descriptor ring.
*/
static int
-vhost_user_set_vring_num(struct virtio_net *dev,
+vhost_user_set_vring_num(struct virtio_net **pdev,
[dpdk-dev] [PATCH v4 5/5] vhost: message handling implemented as a callback array
Introduce vhost_message_handlers, which maps the message request
type to the message handler. Then replace the switch construct
with a map and call.
Failing vhost_user_set_features is fatal and all processing should
stop immediately and propagate the error to the upper layers. Change
the code accordingly to reflect that.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 149 +++--
1 file changed, 56 insertions(+), 93 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 051740477..0c2faa6af 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1477,6 +1477,34 @@ vhost_user_iotlb_msg(struct virtio_net **pdev, struct
VhostUserMsg *msg)
return VH_RESULT_OK;
}
+typedef int (*vhost_message_handler_t)(struct virtio_net **pdev, VhostUserMsg
* msg);
+static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
+ [VHOST_USER_NONE] = NULL,
+ [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
+ [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
+ [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
+ [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
+ [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
+ [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
+ [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
+ [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
+ [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
+ [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
+ [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
+ [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
+ [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
+ [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
+ [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
+ [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
+ [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
+ [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
+ [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
+ [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
+ [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
+ [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
+};
+
+
/* return bytes# of read on success or negative val on failure. */
static int
read_vhost_message(int sockfd, struct VhostUserMsg *msg)
@@ -1630,6 +1658,7 @@ vhost_user_msg_handler(int vid, int fd)
int ret;
int unlock_required = 0;
uint32_t skip_master = 0;
+ int request;
dev = get_device(vid);
if (dev == NULL)
@@ -1722,100 +1751,34 @@ vhost_user_msg_handler(int vid, int fd)
goto skip_to_post_handle;
}
- switch (msg.request.master) {
- case VHOST_USER_GET_FEATURES:
- ret = vhost_user_get_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_FEATURES:
- ret = vhost_user_set_features(&dev, &msg);
- break;
-
- case VHOST_USER_GET_PROTOCOL_FEATURES:
- ret = vhost_user_get_protocol_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_PROTOCOL_FEATURES:
- ret = vhost_user_set_protocol_features(&dev, &msg);
- break;
-
- case VHOST_USER_SET_OWNER:
- ret = vhost_user_set_owner(&dev, &msg);
- break;
- case VHOST_USER_RESET_OWNER:
- ret = vhost_user_reset_owner(&dev, &msg);
- break;
-
- case VHOST_USER_SET_MEM_TABLE:
- ret = vhost_user_set_mem_table(&dev, &msg);
- break;
-
- case VHOST_USER_SET_LOG_BASE:
- ret = vhost_user_set_log_base(&dev, &msg);
- if (ret)
- goto skip_to_reply;
- /* it needs a reply */
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_LOG_FD:
- ret = vhost_user_set_log_fd(&dev, &msg);
- break;
-
- case VHOST_USER_SET_VRING_NUM:
- ret = vhost_user_set_vring_num(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_ADDR:
- ret = vhost_user_set_vring_addr(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_BASE:
- ret = vhost_user_set_vring_base(&dev, &msg);
- break;
-
- case VHOST_USER_GET_VRING_BASE:
- ret = vhost_user_get_vring_base(&dev, &msg);
- if (ret)
- goto skip_to_reply;
- send_vhost_reply(fd, &msg);
-
[dpdk-dev] [PATCH v5 1/5] vhost: unify struct VhostUserMsg usage
Do not use the typedef version of struct VhostUserMsg. Also unify the
related parameter name.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 41 +
1 file changed, 21 insertions(+), 20 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 63d145b2d..505db3bfc 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -250,7 +250,7 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
*/
static int
vhost_user_set_vring_num(struct virtio_net *dev,
-VhostUserMsg *msg)
+struct VhostUserMsg *msg)
{
struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
@@ -611,7 +611,7 @@ translate_ring_addresses(struct virtio_net *dev, int
vq_index)
* This function then converts these to our address space.
*/
static int
-vhost_user_set_vring_addr(struct virtio_net **pdev, VhostUserMsg *msg)
+vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
struct vhost_virtqueue *vq;
struct vhost_vring_addr *addr = &msg->payload.addr;
@@ -648,7 +648,7 @@ vhost_user_set_vring_addr(struct virtio_net **pdev,
VhostUserMsg *msg)
*/
static int
vhost_user_set_vring_base(struct virtio_net *dev,
- VhostUserMsg *msg)
+ struct VhostUserMsg *msg)
{
dev->virtqueue[msg->payload.state.index]->last_used_idx =
msg->payload.state.num;
@@ -780,10 +780,10 @@ vhost_memory_changed(struct VhostUserMemory *new,
}
static int
-vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
struct virtio_net *dev = *pdev;
- struct VhostUserMemory memory = pmsg->payload.memory;
+ struct VhostUserMemory memory = msg->payload.memory;
struct rte_vhost_mem_region *reg;
void *mmap_addr;
uint64_t mmap_size;
@@ -804,7 +804,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
"(%d) memory regions not changed\n", dev->vid);
for (i = 0; i < memory.nregions; i++)
- close(pmsg->fds[i]);
+ close(msg->fds[i]);
return 0;
}
@@ -845,7 +845,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
dev->mem->nregions = memory.nregions;
for (i = 0; i < memory.nregions; i++) {
- fd = pmsg->fds[i];
+ fd = msg->fds[i];
reg = &dev->mem->regions[i];
reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
@@ -994,16 +994,16 @@ virtio_is_ready(struct virtio_net *dev)
}
static void
-vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring call idx:%d file:%d\n", file.index, file.fd);
@@ -1015,17 +1015,17 @@ vhost_user_set_vring_call(struct virtio_net *dev,
struct VhostUserMsg *pmsg)
}
static int
-vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
struct virtio_net *dev = *pdev;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring kick idx:%d file:%d\n", file.index, file.fd);
@@ -1073,7 +1073,7 @@ free_zmbufs(struct vhost_virtqueue *vq)
*/
static int
vhost_user_get_vring_base(struct virtio_net *dev,
- VhostUserMsg *msg)
+ struct VhostUserMsg *msg)
{
struct vhost_virtqueue *vq = dev->virtque
[dpdk-dev] [PATCH v5 2/5] vhost: make message handling functions prepare the reply
As VhostUserMsg structure is reused to generate the reply, move the
relevant fields update into the respective message handling functions.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 24
1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 505db3bfc..4ae7b9346 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -146,11 +146,15 @@ vhost_user_reset_owner(struct virtio_net *dev)
* The features that we support are requested.
*/
static uint64_t
-vhost_user_get_features(struct virtio_net *dev)
+vhost_user_get_features(struct virtio_net *dev, struct VhostUserMsg *msg)
{
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
+
+ msg->payload.u64 = features;
+ msg->size = sizeof(msg->payload.u64);
+
return features;
}
@@ -158,11 +162,15 @@ vhost_user_get_features(struct virtio_net *dev)
* The queue number that we support are requested.
*/
static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev)
+vhost_user_get_queue_num(struct virtio_net *dev, struct VhostUserMsg *msg)
{
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
+
+ msg->payload.u64 = (uint64_t)queue_num;
+ msg->size = sizeof(msg->payload.u64);
+
return queue_num;
}
@@ -1117,6 +1125,8 @@ vhost_user_get_vring_base(struct virtio_net *dev,
rte_free(vq->batch_copy_elems);
vq->batch_copy_elems = NULL;
+ msg->size = sizeof(msg->payload.state);
+
return 0;
}
@@ -1244,6 +1254,8 @@ vhost_user_set_log_base(struct virtio_net *dev, struct
VhostUserMsg *msg)
dev->log_base = dev->log_addr + off;
dev->log_size = size;
+ msg->size = sizeof(msg->payload.u64);
+
return 0;
}
@@ -1658,8 +1670,7 @@ vhost_user_msg_handler(int vid, int fd)
switch (msg.request.master) {
case VHOST_USER_GET_FEATURES:
- msg.payload.u64 = vhost_user_get_features(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_features(dev, &msg);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_FEATURES:
@@ -1690,7 +1701,6 @@ vhost_user_msg_handler(int vid, int fd)
if (ret)
goto skip_to_reply;
/* it needs a reply */
- msg.size = sizeof(msg.payload.u64);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
@@ -1712,7 +1722,6 @@ vhost_user_msg_handler(int vid, int fd)
ret = vhost_user_get_vring_base(dev, &msg);
if (ret)
goto skip_to_reply;
- msg.size = sizeof(msg.payload.state);
send_vhost_reply(fd, &msg);
break;
@@ -1730,8 +1739,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_GET_QUEUE_NUM:
- msg.payload.u64 = (uint64_t)vhost_user_get_queue_num(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_queue_num(dev, &msg);
send_vhost_reply(fd, &msg);
break;
[dpdk-dev] [PATCH v5 3/5] vhost: handle unsupported message types in functions
Add new functions to handle the unsupported vhost message types:
- vhost_user_set_vring_err
- vhost_user_set_log_fd
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 22 +-
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 4ae7b9346..77905dda0 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1022,6 +1022,14 @@ vhost_user_set_vring_call(struct virtio_net *dev, struct
VhostUserMsg *msg)
vq->callfd = file.fd;
}
+static void vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
+ struct VhostUserMsg *msg)
+{
+ if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+}
+
static int
vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
@@ -1259,6 +1267,13 @@ vhost_user_set_log_base(struct virtio_net *dev, struct
VhostUserMsg *msg)
return 0;
}
+static void vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
+ struct VhostUserMsg *msg)
+{
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+}
+
/*
* An rarp packet is constructed and broadcasted to notify switches about
* the new location of the migrated VM, so that packets from outside will
@@ -1704,8 +1719,7 @@ vhost_user_msg_handler(int vid, int fd)
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+ vhost_user_set_log_fd(&dev, &msg);
break;
case VHOST_USER_SET_VRING_NUM:
@@ -1733,9 +1747,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_SET_VRING_ERR:
- if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+ vhost_user_set_vring_err(&dev, &msg);
break;
case VHOST_USER_GET_QUEUE_NUM:
[dpdk-dev] [PATCH v5 0/5] vhost_user.c code cleanup
vhost: vhost_user.c code cleanup This patchesries introduce a set of code redesigns in vhost_user.c. The goal is to unify and simplify vhost-user message handling. The patches do not intend to introduce any functional changes. v5 changes: - fixed the usage of struct VhostUserMsg in all patches (Anatoly Burakov) v4 changes: - use struct VhostUserMsg as the coding style guide suggests (Anatoly Burakov) - VH_RESULT_FATAL is removed as not needed anymore (Maxime Coquelin) v3 changes: - rebased on top of git://dpdk.org/next/dpdk-next-virtio dead0602 - introduce VH_RESULT_FATAL (Maxime Coquelin) - vhost_user_set_features return VH_RESULT_FATAL on failure. This allows keeping the propagate error logic (Ilya Maximets) - fixed vhost_user_set_vring_kick and vhost_user_set_protocol_features return VH_RESULT_ERR upon failure - fixed missing break in case VH_RESULT_ERR (Ilya Maximets) - fixed a type on the description of 2/5 patch (Maxime Coquelin) v2 changes: - Fix the comments by Tiwei Bie - Keep the old behavior - Fall through when the callback returns VH_RESULT_ERR - Fall through if the request is out of range --- Nikolay Nikolaev (5): vhost: unify struct VhostUserMsg usage vhost: make message handling functions prepare the reply vhost: handle unsupported message types in functions vhost: unify message handling function signature vhost: message handling implemented as a callback array lib/librte_vhost/vhost_user.c | 393 ++--- 1 file changed, 208 insertions(+), 185 deletions(-) -- Signature
[dpdk-dev] [PATCH v5 4/5] vhost: unify message handling function signature
Each vhost-user message handling function will return an int result
which is described in the new enum vh_result: error, OK and reply.
All functions will now have two arguments, virtio_net double pointer
and VhostUserMsg pointer.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 211 -
1 file changed, 125 insertions(+), 86 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 77905dda0..ac89f413d 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -71,6 +71,16 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
};
+/* The possible results of a message handling function */
+enum vh_result {
+ /* Message handling failed */
+ VH_RESULT_ERR = -1,
+ /* Message handling successful */
+ VH_RESULT_OK= 0,
+ /* Message handling successful and reply prepared */
+ VH_RESULT_REPLY = 1,
+};
+
static uint64_t
get_blk_size(int fd)
{
@@ -127,27 +137,31 @@ vhost_backend_cleanup(struct virtio_net *dev)
* the device hasn't been initialised.
*/
static int
-vhost_user_set_owner(void)
+vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
+ VhostUserMsg * msg __rte_unused)
{
- return 0;
+ return VH_RESULT_OK;
}
static int
-vhost_user_reset_owner(struct virtio_net *dev)
+vhost_user_reset_owner(struct virtio_net **pdev,
+ VhostUserMsg * msg __rte_unused)
{
+ struct virtio_net *dev = *pdev;
vhost_destroy_device_notify(dev);
cleanup_device(dev, 0);
reset_device(dev);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The features that we support are requested.
*/
-static uint64_t
-vhost_user_get_features(struct virtio_net *dev, struct VhostUserMsg *msg)
+static int
+vhost_user_get_features(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
@@ -155,15 +169,16 @@ vhost_user_get_features(struct virtio_net *dev, struct
VhostUserMsg *msg)
msg->payload.u64 = features;
msg->size = sizeof(msg->payload.u64);
- return features;
+ return VH_RESULT_REPLY;
}
/*
* The queue number that we support are requested.
*/
-static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev, struct VhostUserMsg *msg)
+static int
+vhost_user_get_queue_num(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
@@ -171,15 +186,17 @@ vhost_user_get_queue_num(struct virtio_net *dev, struct
VhostUserMsg *msg)
msg->payload.u64 = (uint64_t)queue_num;
msg->size = sizeof(msg->payload.u64);
- return queue_num;
+ return VH_RESULT_REPLY;
}
/*
* We receive the negotiated features supported by us and the virtio device.
*/
static int
-vhost_user_set_features(struct virtio_net *dev, uint64_t features)
+vhost_user_set_features(struct virtio_net **pdev, VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
+ uint64_t features = msg->payload.u64;
uint64_t vhost_features = 0;
struct rte_vdpa_device *vdpa_dev;
int did = -1;
@@ -189,12 +206,12 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) received invalid negotiated features.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->flags & VIRTIO_DEV_RUNNING) {
if (dev->features == features)
- return 0;
+ return VH_RESULT_OK;
/*
* Error out if master tries to change features while device is
@@ -205,7 +222,7 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) features changed while device is
running.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->notify_ops->features_changed)
@@ -250,16 +267,17 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
if (vdpa_dev && vdpa_dev->ops->set_features)
vdpa_dev->ops->set_features(dev->vid);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The virtio device sends us the size of the descriptor ring.
*/
static int
-vhost_user_set_vring_num(struct virtio_net *dev,
+vhost_user_set_vring
[dpdk-dev] [PATCH v5 5/5] vhost: message handling implemented as a callback array
Introduce vhost_message_handlers, which maps the message request
type to the message handler. Then replace the switch construct
with a map and call.
Failing vhost_user_set_features is fatal and all processing should
stop immediately and propagate the error to the upper layers. Change
the code accordingly to reflect that.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 149 +++--
1 file changed, 56 insertions(+), 93 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index ac89f413d..faad3ba49 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1477,6 +1477,34 @@ vhost_user_iotlb_msg(struct virtio_net **pdev, struct
VhostUserMsg *msg)
return VH_RESULT_OK;
}
+typedef int (*vhost_message_handler_t)(struct virtio_net **pdev, VhostUserMsg
* msg);
+static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
+ [VHOST_USER_NONE] = NULL,
+ [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
+ [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
+ [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
+ [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
+ [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
+ [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
+ [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
+ [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
+ [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
+ [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
+ [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
+ [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
+ [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
+ [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
+ [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
+ [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
+ [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
+ [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
+ [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
+ [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
+ [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
+ [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
+};
+
+
/* return bytes# of read on success or negative val on failure. */
static int
read_vhost_message(int sockfd, struct VhostUserMsg *msg)
@@ -1630,6 +1658,7 @@ vhost_user_msg_handler(int vid, int fd)
int ret;
int unlock_required = 0;
uint32_t skip_master = 0;
+ int request;
dev = get_device(vid);
if (dev == NULL)
@@ -1722,100 +1751,34 @@ vhost_user_msg_handler(int vid, int fd)
goto skip_to_post_handle;
}
- switch (msg.request.master) {
- case VHOST_USER_GET_FEATURES:
- ret = vhost_user_get_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_FEATURES:
- ret = vhost_user_set_features(&dev, &msg);
- break;
-
- case VHOST_USER_GET_PROTOCOL_FEATURES:
- ret = vhost_user_get_protocol_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_PROTOCOL_FEATURES:
- ret = vhost_user_set_protocol_features(&dev, &msg);
- break;
-
- case VHOST_USER_SET_OWNER:
- ret = vhost_user_set_owner(&dev, &msg);
- break;
- case VHOST_USER_RESET_OWNER:
- ret = vhost_user_reset_owner(&dev, &msg);
- break;
-
- case VHOST_USER_SET_MEM_TABLE:
- ret = vhost_user_set_mem_table(&dev, &msg);
- break;
-
- case VHOST_USER_SET_LOG_BASE:
- ret = vhost_user_set_log_base(&dev, &msg);
- if (ret)
- goto skip_to_reply;
- /* it needs a reply */
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_LOG_FD:
- ret = vhost_user_set_log_fd(&dev, &msg);
- break;
-
- case VHOST_USER_SET_VRING_NUM:
- ret = vhost_user_set_vring_num(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_ADDR:
- ret = vhost_user_set_vring_addr(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_BASE:
- ret = vhost_user_set_vring_base(&dev, &msg);
- break;
-
- case VHOST_USER_GET_VRING_BASE:
- ret = vhost_user_get_vring_base(&dev, &msg);
- if (ret)
- goto skip_to_reply;
- send_vhost_reply(fd, &msg);
-
[dpdk-dev] [PATCH v6 0/5] vhost: vhost_user.c code cleanup
vhost: vhost_user.c code cleanup This patchesries introduce a set of code redesigns in vhost_user.c. The goal is to unify and simplify vhost-user message handling. The patches do not intend to introduce any functional changes. v6 changes: - Even more fixes to the usage of struct VhostUserMsg in the patches (Anatoly Burakov) v5 changes: - fixed the usage of struct VhostUserMsg in all patches (Anatoly Burakov) v4 changes: - use struct VhostUserMsg as the coding style guide suggests (Anatoly Burakov) - VH_RESULT_FATAL is removed as not needed anymore (Maxime Coquelin) v3 changes: - rebased on top of git://dpdk.org/next/dpdk-next-virtio dead0602 - introduce VH_RESULT_FATAL (Maxime Coquelin) - vhost_user_set_features return VH_RESULT_FATAL on failure. This allows keeping the propagate error logic (Ilya Maximets) - fixed vhost_user_set_vring_kick and vhost_user_set_protocol_features return VH_RESULT_ERR upon failure - fixed missing break in case VH_RESULT_ERR (Ilya Maximets) - fixed a type on the description of 2/5 patch (Maxime Coquelin) v2 changes: - Fix the comments by Tiwei Bie - Keep the old behavior - Fall through when the callback returns VH_RESULT_ERR - Fall through if the request is out of range --- Nikolay Nikolaev (5): vhost: unify struct VhostUserMsg usage vhost: make message handling functions prepare the reply vhost: handle unsupported message types in functions vhost: unify message handling function signature vhost: message handling implemented as a callback array lib/librte_vhost/vhost_user.c | 394 ++--- 1 file changed, 209 insertions(+), 185 deletions(-) -- Signature
[dpdk-dev] [PATCH v6 4/5] vhost: unify message handling function signature
Each vhost-user message handling function will return an int result
which is described in the new enum vh_result: error, OK and reply.
All functions will now have two arguments, virtio_net double pointer
and VhostUserMsg pointer.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 211 -
1 file changed, 125 insertions(+), 86 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 77905dda0..e1b705fa7 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -71,6 +71,16 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
[VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
};
+/* The possible results of a message handling function */
+enum vh_result {
+ /* Message handling failed */
+ VH_RESULT_ERR = -1,
+ /* Message handling successful */
+ VH_RESULT_OK= 0,
+ /* Message handling successful and reply prepared */
+ VH_RESULT_REPLY = 1,
+};
+
static uint64_t
get_blk_size(int fd)
{
@@ -127,27 +137,31 @@ vhost_backend_cleanup(struct virtio_net *dev)
* the device hasn't been initialised.
*/
static int
-vhost_user_set_owner(void)
+vhost_user_set_owner(struct virtio_net **pdev __rte_unused,
+ struct VhostUserMsg *msg __rte_unused)
{
- return 0;
+ return VH_RESULT_OK;
}
static int
-vhost_user_reset_owner(struct virtio_net *dev)
+vhost_user_reset_owner(struct virtio_net **pdev,
+ struct VhostUserMsg *msg __rte_unused)
{
+ struct virtio_net *dev = *pdev;
vhost_destroy_device_notify(dev);
cleanup_device(dev, 0);
reset_device(dev);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The features that we support are requested.
*/
-static uint64_t
-vhost_user_get_features(struct virtio_net *dev, struct VhostUserMsg *msg)
+static int
+vhost_user_get_features(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
@@ -155,15 +169,16 @@ vhost_user_get_features(struct virtio_net *dev, struct
VhostUserMsg *msg)
msg->payload.u64 = features;
msg->size = sizeof(msg->payload.u64);
- return features;
+ return VH_RESULT_REPLY;
}
/*
* The queue number that we support are requested.
*/
-static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev, struct VhostUserMsg *msg)
+static int
+vhost_user_get_queue_num(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
@@ -171,15 +186,17 @@ vhost_user_get_queue_num(struct virtio_net *dev, struct
VhostUserMsg *msg)
msg->payload.u64 = (uint64_t)queue_num;
msg->size = sizeof(msg->payload.u64);
- return queue_num;
+ return VH_RESULT_REPLY;
}
/*
* We receive the negotiated features supported by us and the virtio device.
*/
static int
-vhost_user_set_features(struct virtio_net *dev, uint64_t features)
+vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
+ struct virtio_net *dev = *pdev;
+ uint64_t features = msg->payload.u64;
uint64_t vhost_features = 0;
struct rte_vdpa_device *vdpa_dev;
int did = -1;
@@ -189,12 +206,12 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) received invalid negotiated features.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->flags & VIRTIO_DEV_RUNNING) {
if (dev->features == features)
- return 0;
+ return VH_RESULT_OK;
/*
* Error out if master tries to change features while device is
@@ -205,7 +222,7 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
RTE_LOG(ERR, VHOST_CONFIG,
"(%d) features changed while device is
running.\n",
dev->vid);
- return -1;
+ return VH_RESULT_ERR;
}
if (dev->notify_ops->features_changed)
@@ -250,16 +267,17 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
if (vdpa_dev && vdpa_dev->ops->set_features)
vdpa_dev->ops->set_features(dev->vid);
- return 0;
+ return VH_RESULT_OK;
}
/*
* The virtio device sends us the size of the descriptor ring.
*/
static int
-vhost_user_set_vring_num(struct vir
[dpdk-dev] [PATCH v6 5/5] vhost: message handling implemented as a callback array
Introduce vhost_message_handlers, which maps the message request
type to the message handler. Then replace the switch construct
with a map and call.
Failing vhost_user_set_features is fatal and all processing should
stop immediately and propagate the error to the upper layers. Change
the code accordingly to reflect that.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 150 -
1 file changed, 57 insertions(+), 93 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index e1b705fa7..f6ce8e092 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1477,6 +1477,35 @@ vhost_user_iotlb_msg(struct virtio_net **pdev, struct
VhostUserMsg *msg)
return VH_RESULT_OK;
}
+typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
+ struct VhostUserMsg *msg);
+static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
+ [VHOST_USER_NONE] = NULL,
+ [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
+ [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
+ [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
+ [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
+ [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
+ [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
+ [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
+ [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
+ [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
+ [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
+ [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
+ [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
+ [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
+ [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
+ [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
+ [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
+ [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
+ [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
+ [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
+ [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
+ [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
+ [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
+};
+
+
/* return bytes# of read on success or negative val on failure. */
static int
read_vhost_message(int sockfd, struct VhostUserMsg *msg)
@@ -1630,6 +1659,7 @@ vhost_user_msg_handler(int vid, int fd)
int ret;
int unlock_required = 0;
uint32_t skip_master = 0;
+ int request;
dev = get_device(vid);
if (dev == NULL)
@@ -1722,100 +1752,34 @@ vhost_user_msg_handler(int vid, int fd)
goto skip_to_post_handle;
}
- switch (msg.request.master) {
- case VHOST_USER_GET_FEATURES:
- ret = vhost_user_get_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_FEATURES:
- ret = vhost_user_set_features(&dev, &msg);
- break;
-
- case VHOST_USER_GET_PROTOCOL_FEATURES:
- ret = vhost_user_get_protocol_features(&dev, &msg);
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_PROTOCOL_FEATURES:
- ret = vhost_user_set_protocol_features(&dev, &msg);
- break;
-
- case VHOST_USER_SET_OWNER:
- ret = vhost_user_set_owner(&dev, &msg);
- break;
- case VHOST_USER_RESET_OWNER:
- ret = vhost_user_reset_owner(&dev, &msg);
- break;
-
- case VHOST_USER_SET_MEM_TABLE:
- ret = vhost_user_set_mem_table(&dev, &msg);
- break;
-
- case VHOST_USER_SET_LOG_BASE:
- ret = vhost_user_set_log_base(&dev, &msg);
- if (ret)
- goto skip_to_reply;
- /* it needs a reply */
- send_vhost_reply(fd, &msg);
- break;
- case VHOST_USER_SET_LOG_FD:
- ret = vhost_user_set_log_fd(&dev, &msg);
- break;
-
- case VHOST_USER_SET_VRING_NUM:
- ret = vhost_user_set_vring_num(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_ADDR:
- ret = vhost_user_set_vring_addr(&dev, &msg);
- break;
- case VHOST_USER_SET_VRING_BASE:
- ret = vhost_user_set_vring_base(&dev, &msg);
- break;
-
- case VHOST_USER_GET_VRING_BASE:
- ret = vhost_user_get_vring_base(&dev, &msg);
- if (ret)
- goto skip_t
[dpdk-dev] [PATCH v6 1/5] vhost: unify struct VhostUserMsg usage
Do not use the typedef version of struct VhostUserMsg. Also unify the
related parameter name.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 41 +
1 file changed, 21 insertions(+), 20 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 63d145b2d..505db3bfc 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -250,7 +250,7 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t
features)
*/
static int
vhost_user_set_vring_num(struct virtio_net *dev,
-VhostUserMsg *msg)
+struct VhostUserMsg *msg)
{
struct vhost_virtqueue *vq = dev->virtqueue[msg->payload.state.index];
@@ -611,7 +611,7 @@ translate_ring_addresses(struct virtio_net *dev, int
vq_index)
* This function then converts these to our address space.
*/
static int
-vhost_user_set_vring_addr(struct virtio_net **pdev, VhostUserMsg *msg)
+vhost_user_set_vring_addr(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
struct vhost_virtqueue *vq;
struct vhost_vring_addr *addr = &msg->payload.addr;
@@ -648,7 +648,7 @@ vhost_user_set_vring_addr(struct virtio_net **pdev,
VhostUserMsg *msg)
*/
static int
vhost_user_set_vring_base(struct virtio_net *dev,
- VhostUserMsg *msg)
+ struct VhostUserMsg *msg)
{
dev->virtqueue[msg->payload.state.index]->last_used_idx =
msg->payload.state.num;
@@ -780,10 +780,10 @@ vhost_memory_changed(struct VhostUserMemory *new,
}
static int
-vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
struct virtio_net *dev = *pdev;
- struct VhostUserMemory memory = pmsg->payload.memory;
+ struct VhostUserMemory memory = msg->payload.memory;
struct rte_vhost_mem_region *reg;
void *mmap_addr;
uint64_t mmap_size;
@@ -804,7 +804,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
"(%d) memory regions not changed\n", dev->vid);
for (i = 0; i < memory.nregions; i++)
- close(pmsg->fds[i]);
+ close(msg->fds[i]);
return 0;
}
@@ -845,7 +845,7 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct
VhostUserMsg *pmsg)
dev->mem->nregions = memory.nregions;
for (i = 0; i < memory.nregions; i++) {
- fd = pmsg->fds[i];
+ fd = msg->fds[i];
reg = &dev->mem->regions[i];
reg->guest_phys_addr = memory.regions[i].guest_phys_addr;
@@ -994,16 +994,16 @@ virtio_is_ready(struct virtio_net *dev)
}
static void
-vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_call(struct virtio_net *dev, struct VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring call idx:%d file:%d\n", file.index, file.fd);
@@ -1015,17 +1015,17 @@ vhost_user_set_vring_call(struct virtio_net *dev,
struct VhostUserMsg *pmsg)
}
static int
-vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *pmsg)
+vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
struct vhost_vring_file file;
struct vhost_virtqueue *vq;
struct virtio_net *dev = *pdev;
- file.index = pmsg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
- if (pmsg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
+ file.index = msg->payload.u64 & VHOST_USER_VRING_IDX_MASK;
+ if (msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK)
file.fd = VIRTIO_INVALID_EVENTFD;
else
- file.fd = pmsg->fds[0];
+ file.fd = msg->fds[0];
RTE_LOG(INFO, VHOST_CONFIG,
"vring kick idx:%d file:%d\n", file.index, file.fd);
@@ -1073,7 +1073,7 @@ free_zmbufs(struct vhost_virtqueue *vq)
*/
static int
vhost_user_get_vring_base(struct virtio_net *dev,
- VhostUserMsg *msg)
+ struct VhostUserMsg *msg)
{
struct vhost_virtqueue *vq = dev->virtque
[dpdk-dev] [PATCH v6 2/5] vhost: make message handling functions prepare the reply
As VhostUserMsg structure is reused to generate the reply, move the
relevant fields update into the respective message handling functions.
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 24
1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 505db3bfc..4ae7b9346 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -146,11 +146,15 @@ vhost_user_reset_owner(struct virtio_net *dev)
* The features that we support are requested.
*/
static uint64_t
-vhost_user_get_features(struct virtio_net *dev)
+vhost_user_get_features(struct virtio_net *dev, struct VhostUserMsg *msg)
{
uint64_t features = 0;
rte_vhost_driver_get_features(dev->ifname, &features);
+
+ msg->payload.u64 = features;
+ msg->size = sizeof(msg->payload.u64);
+
return features;
}
@@ -158,11 +162,15 @@ vhost_user_get_features(struct virtio_net *dev)
* The queue number that we support are requested.
*/
static uint32_t
-vhost_user_get_queue_num(struct virtio_net *dev)
+vhost_user_get_queue_num(struct virtio_net *dev, struct VhostUserMsg *msg)
{
uint32_t queue_num = 0;
rte_vhost_driver_get_queue_num(dev->ifname, &queue_num);
+
+ msg->payload.u64 = (uint64_t)queue_num;
+ msg->size = sizeof(msg->payload.u64);
+
return queue_num;
}
@@ -1117,6 +1125,8 @@ vhost_user_get_vring_base(struct virtio_net *dev,
rte_free(vq->batch_copy_elems);
vq->batch_copy_elems = NULL;
+ msg->size = sizeof(msg->payload.state);
+
return 0;
}
@@ -1244,6 +1254,8 @@ vhost_user_set_log_base(struct virtio_net *dev, struct
VhostUserMsg *msg)
dev->log_base = dev->log_addr + off;
dev->log_size = size;
+ msg->size = sizeof(msg->payload.u64);
+
return 0;
}
@@ -1658,8 +1670,7 @@ vhost_user_msg_handler(int vid, int fd)
switch (msg.request.master) {
case VHOST_USER_GET_FEATURES:
- msg.payload.u64 = vhost_user_get_features(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_features(dev, &msg);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_FEATURES:
@@ -1690,7 +1701,6 @@ vhost_user_msg_handler(int vid, int fd)
if (ret)
goto skip_to_reply;
/* it needs a reply */
- msg.size = sizeof(msg.payload.u64);
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
@@ -1712,7 +1722,6 @@ vhost_user_msg_handler(int vid, int fd)
ret = vhost_user_get_vring_base(dev, &msg);
if (ret)
goto skip_to_reply;
- msg.size = sizeof(msg.payload.state);
send_vhost_reply(fd, &msg);
break;
@@ -1730,8 +1739,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_GET_QUEUE_NUM:
- msg.payload.u64 = (uint64_t)vhost_user_get_queue_num(dev);
- msg.size = sizeof(msg.payload.u64);
+ vhost_user_get_queue_num(dev, &msg);
send_vhost_reply(fd, &msg);
break;
[dpdk-dev] [PATCH v6 3/5] vhost: handle unsupported message types in functions
Add new functions to handle the unsupported vhost message types:
- vhost_user_set_vring_err
- vhost_user_set_log_fd
Signed-off-by: Nikolay Nikolaev
---
lib/librte_vhost/vhost_user.c | 22 +-
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 4ae7b9346..77905dda0 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1022,6 +1022,14 @@ vhost_user_set_vring_call(struct virtio_net *dev, struct
VhostUserMsg *msg)
vq->callfd = file.fd;
}
+static void vhost_user_set_vring_err(struct virtio_net **pdev __rte_unused,
+ struct VhostUserMsg *msg)
+{
+ if (!(msg->payload.u64 & VHOST_USER_VRING_NOFD_MASK))
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+}
+
static int
vhost_user_set_vring_kick(struct virtio_net **pdev, struct VhostUserMsg *msg)
{
@@ -1259,6 +1267,13 @@ vhost_user_set_log_base(struct virtio_net *dev, struct
VhostUserMsg *msg)
return 0;
}
+static void vhost_user_set_log_fd(struct virtio_net **pdev __rte_unused,
+ struct VhostUserMsg *msg)
+{
+ close(msg->fds[0]);
+ RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+}
+
/*
* An rarp packet is constructed and broadcasted to notify switches about
* the new location of the migrated VM, so that packets from outside will
@@ -1704,8 +1719,7 @@ vhost_user_msg_handler(int vid, int fd)
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented.\n");
+ vhost_user_set_log_fd(&dev, &msg);
break;
case VHOST_USER_SET_VRING_NUM:
@@ -1733,9 +1747,7 @@ vhost_user_msg_handler(int vid, int fd)
break;
case VHOST_USER_SET_VRING_ERR:
- if (!(msg.payload.u64 & VHOST_USER_VRING_NOFD_MASK))
- close(msg.fds[0]);
- RTE_LOG(INFO, VHOST_CONFIG, "not implemented\n");
+ vhost_user_set_vring_err(&dev, &msg);
break;
case VHOST_USER_GET_QUEUE_NUM:
