[dpdk-dev] [PATCH 05/12] vhost: add support for postcopy's listen message

[Maxime Coquelin]

Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
 lib/librte_vhost/vhost.h      |  1 +
 lib/librte_vhost/vhost_user.c | 18 ++++++++++++++++++
 lib/librte_vhost/vhost_user.h |  4 +++-
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index 21722d8a8..9453cb28d 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -364,6 +364,7 @@ struct virtio_net {
        rte_spinlock_t          slave_req_lock;
 
        int                     postcopy_ufd;
+       int                     postcopy_listening;
 
        /*
         * Device id to identify a specific backend device.
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index bdfe2cac0..d9ef5bca8 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -74,6 +74,7 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
        [VHOST_USER_CRYPTO_CREATE_SESS] = "VHOST_USER_CRYPTO_CREATE_SESS",
        [VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
        [VHOST_USER_POSTCOPY_ADVISE]  = "VHOST_USER_POSTCOPY_ADVISE",
+       [VHOST_USER_POSTCOPY_LISTEN]  = "VHOST_USER_POSTCOPY_LISTEN",
 };
 
 static uint64_t
@@ -1444,6 +1445,19 @@ vhost_user_set_postcopy_advise(struct virtio_net *dev, 
struct VhostUserMsg *msg)
        return 0;
 }
 
+static int
+vhost_user_set_postcopy_listen(struct virtio_net *dev)
+{
+       if (dev->mem && dev->mem->nregions) {
+               RTE_LOG(ERR, VHOST_CONFIG,
+                               "Regions already registered at 
postcopy-listen\n");
+               return -1;
+       }
+       dev->postcopy_listening = 1;
+
+       return 0;
+}
+
 /* return bytes# of read on success or negative val on failure. */
 static int
 read_vhost_message(int sockfd, struct VhostUserMsg *msg)
@@ -1793,6 +1807,10 @@ vhost_user_msg_handler(int vid, int fd)
                send_vhost_reply(fd, &msg);
                break;
 
+       case VHOST_USER_POSTCOPY_LISTEN:
+               ret = vhost_user_set_postcopy_listen(dev);
+               break;
+
        default:
                ret = -1;
                break;
diff --git a/lib/librte_vhost/vhost_user.h b/lib/librte_vhost/vhost_user.h
index 2030b40a5..73b1fe2b9 100644
--- a/lib/librte_vhost/vhost_user.h
+++ b/lib/librte_vhost/vhost_user.h
@@ -51,7 +51,9 @@ typedef enum VhostUserRequest {
        VHOST_USER_CRYPTO_CREATE_SESS = 26,
        VHOST_USER_CRYPTO_CLOSE_SESS = 27,
        VHOST_USER_POSTCOPY_ADVISE = 28,
-       VHOST_USER_MAX = 29
+       VHOST_USER_POSTCOPY_LISTEN = 29,
+       VHOST_USER_POSTCOPY_END = 30,
+       VHOST_USER_MAX = 31
 } VhostUserRequest;
 
 typedef enum VhostUserSlaveRequest {
-- 
2.17.1