From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, tiwei.bie@intel.com, zhihong.wang@intel.com,
jfreimann@redhat.com
Cc: dgilbert@redhat.com, Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [dpdk-dev] [RFC 03/10] vhost: enable fds passing when sending vhost-user messages
Date: Thu, 23 Aug 2018 18:51:50 +0200 [thread overview]
Message-ID: <20180823165157.30001-4-maxime.coquelin@redhat.com> (raw)
In-Reply-To: <20180823165157.30001-1-maxime.coquelin@redhat.com>
Passing userfault fds to Qemu will be required for postcopy
live-migration feature.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
lib/librte_vhost/vhost_user.c | 26 ++++++++++++++------------
1 file changed, 14 insertions(+), 12 deletions(-)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 0a7cbfa14..9d1e9cf75 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1168,6 +1168,7 @@ vhost_user_get_protocol_features(struct virtio_net *dev,
msg->payload.u64 = protocol_features;
msg->size = sizeof(msg->payload.u64);
+ msg->fd_num = 0;
}
static void
@@ -1434,13 +1435,13 @@ read_vhost_message(int sockfd, struct VhostUserMsg *msg)
}
static int
-send_vhost_message(int sockfd, struct VhostUserMsg *msg, int *fds, int fd_num)
+send_vhost_message(int sockfd, struct VhostUserMsg *msg)
{
if (!msg)
return 0;
return send_fd_message(sockfd, (char *)msg,
- VHOST_USER_HDR_SIZE + msg->size, fds, fd_num);
+ VHOST_USER_HDR_SIZE + msg->size, msg->fds, msg->fd_num);
}
static int
@@ -1454,19 +1455,18 @@ send_vhost_reply(int sockfd, struct VhostUserMsg *msg)
msg->flags |= VHOST_USER_VERSION;
msg->flags |= VHOST_USER_REPLY_MASK;
- return send_vhost_message(sockfd, msg, NULL, 0);
+ return send_vhost_message(sockfd, msg);
}
static int
-send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg,
- int *fds, int fd_num)
+send_vhost_slave_message(struct virtio_net *dev, struct VhostUserMsg *msg)
{
int ret;
if (msg->flags & VHOST_USER_NEED_REPLY)
rte_spinlock_lock(&dev->slave_req_lock);
- ret = send_vhost_message(dev->slave_req_fd, msg, fds, fd_num);
+ ret = send_vhost_message(dev->slave_req_fd, msg);
if (ret < 0 && (msg->flags & VHOST_USER_NEED_REPLY))
rte_spinlock_unlock(&dev->slave_req_lock);
@@ -1651,6 +1651,7 @@ vhost_user_msg_handler(int vid, int fd)
case VHOST_USER_GET_FEATURES:
msg.payload.u64 = vhost_user_get_features(dev);
msg.size = sizeof(msg.payload.u64);
+ msg.fd_num = 0;
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_FEATURES:
@@ -1683,6 +1684,7 @@ vhost_user_msg_handler(int vid, int fd)
/* it needs a reply */
msg.size = sizeof(msg.payload.u64);
+ msg.fd_num = 0;
send_vhost_reply(fd, &msg);
break;
case VHOST_USER_SET_LOG_FD:
@@ -1722,6 +1724,7 @@ vhost_user_msg_handler(int vid, int fd)
case VHOST_USER_GET_QUEUE_NUM:
msg.payload.u64 = (uint64_t)vhost_user_get_queue_num(dev);
msg.size = sizeof(msg.payload.u64);
+ msg.fd_num = 0;
send_vhost_reply(fd, &msg);
break;
@@ -1769,6 +1772,7 @@ vhost_user_msg_handler(int vid, int fd)
if (msg.flags & VHOST_USER_NEED_REPLY) {
msg.payload.u64 = !!ret;
msg.size = sizeof(msg.payload.u64);
+ msg.fd_num = 0;
send_vhost_reply(fd, &msg);
}
@@ -1848,7 +1852,7 @@ vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
},
};
- ret = send_vhost_message(dev->slave_req_fd, &msg, NULL, 0);
+ ret = send_vhost_message(dev->slave_req_fd, &msg);
if (ret < 0) {
RTE_LOG(ERR, VHOST_CONFIG,
"Failed to send IOTLB miss message (%d)\n",
@@ -1864,8 +1868,6 @@ static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
uint64_t offset,
uint64_t size)
{
- int *fdp = NULL;
- size_t fd_num = 0;
int ret;
struct VhostUserMsg msg = {
.request.slave = VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG,
@@ -1881,11 +1883,11 @@ static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
if (fd < 0)
msg.payload.area.u64 |= VHOST_USER_VRING_NOFD_MASK;
else {
- fdp = &fd;
- fd_num = 1;
+ msg.fds[0] = fd;
+ msg.fd_num = 1;
}
- ret = send_vhost_slave_message(dev, &msg, fdp, fd_num);
+ ret = send_vhost_slave_message(dev, &msg);
if (ret < 0) {
RTE_LOG(ERR, VHOST_CONFIG,
"Failed to set host notifier (%d)\n", ret);
--
2.17.1
next prev parent reply other threads:[~2018-08-23 16:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-23 16:51 [dpdk-dev] [RFC 00/10] vhost: add postcopy live-migration support Maxime Coquelin
2018-08-23 16:51 ` [dpdk-dev] [RFC 01/10] vhost: define postcopy protocol flag Maxime Coquelin
2018-08-23 16:51 ` [dpdk-dev] [RFC 02/10] vhost: add number of fds to vhost-user messages and use it Maxime Coquelin
2018-08-23 16:51 ` Maxime Coquelin [this message]
2018-08-23 16:51 ` [dpdk-dev] [RFC 04/10] vhost: introduce postcopy's advise message Maxime Coquelin
2018-08-23 16:51 ` [dpdk-dev] [RFC 05/10] vhost: add support for postcopy's listen message Maxime Coquelin
2018-08-23 16:51 ` [dpdk-dev] [RFC 06/10] vhost: register new regions with userfaultfd Maxime Coquelin
2018-08-23 16:51 ` [dpdk-dev] [RFC 07/10] vhost: avoid useless VhostUserMemory copy Maxime Coquelin
2018-08-23 16:51 ` [dpdk-dev] [RFC 08/10] vhost: send userfault range addresses back to qemu Maxime Coquelin
2018-08-23 16:51 ` [dpdk-dev] [RFC 09/10] vhost: add support to postcopy's end request Maxime Coquelin
2018-08-23 16:51 ` [dpdk-dev] [RFC 10/10] vhost: enable postcopy protocol feature Maxime Coquelin
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