[dpdk-dev] [PATCH v7 12/19] 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 | 21 +++++++++++++++++++++
 lib/librte_vhost/vhost_user.h |  3 ++-
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index d81da0674..b4abad30c 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -369,6 +369,7 @@ 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 970ad5896..051589297 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -76,6 +76,7 @@ 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
@@ -132,6 +133,8 @@ vhost_backend_cleanup(struct virtio_net *dev)
                close(dev->postcopy_ufd);
                dev->postcopy_ufd = -1;
        }
+
+       dev->postcopy_listening = 0;
 }
 
 /*
@@ -1549,6 +1552,23 @@ vhost_user_set_postcopy_advise(struct virtio_net **pdev,
 #endif
 }
 
+static int
+vhost_user_set_postcopy_listen(struct virtio_net **pdev,
+                       struct VhostUserMsg *msg __rte_unused,
+                       int main_fd __rte_unused)
+{
+       struct virtio_net *dev = *pdev;
+
+       if (dev->mem && dev->mem->nregions) {
+               RTE_LOG(ERR, VHOST_CONFIG,
+                       "Regions already registered at postcopy-listen\n");
+               return VH_RESULT_ERR;
+       }
+       dev->postcopy_listening = 1;
+
+       return VH_RESULT_OK;
+}
+
 typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
                                        struct VhostUserMsg *msg,
                                        int main_fd);
@@ -1577,6 +1597,7 @@ static vhost_message_handler_t 
vhost_message_handlers[VHOST_USER_MAX] = {
        [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
        [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
        [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
+       [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
 };
 
 
diff --git a/lib/librte_vhost/vhost_user.h b/lib/librte_vhost/vhost_user.h
index 2030b40a5..55d8659ba 100644
--- a/lib/librte_vhost/vhost_user.h
+++ b/lib/librte_vhost/vhost_user.h
@@ -51,7 +51,8 @@ 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_MAX = 30
 } VhostUserRequest;
 
 typedef enum VhostUserSlaveRequest {
-- 
2.17.1