[RFC spice-vdagent 02/18] vport: add by_user param to vdagent_virtio_port_disconnect_callback

[Jakub Janků <jjanku@xxxxxxxxxx>]

If the virtio port is destroyed explicitly
by calling vdagent_virtio_port_destroy(),
by_user is set to TRUE, otherwise to FALSE.

This will be used later with GMainLoop.
---
 src/vdagentd/virtio-port.c | 24 +++++++++++++++---------
 src/vdagentd/virtio-port.h | 10 +++++-----
 2 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/src/vdagentd/virtio-port.c b/src/vdagentd/virtio-port.c
index 3dc6f44..642c848 100644
--- a/src/vdagentd/virtio-port.c
+++ b/src/vdagentd/virtio-port.c
@@ -122,7 +122,8 @@ error:
     return NULL;
 }
 
-void vdagent_virtio_port_destroy(struct vdagent_virtio_port **vportp)
+static void virtio_port_destroy(struct vdagent_virtio_port **vportp,
+                                gboolean by_user)
 {
     struct vdagent_virtio_port_buf *wbuf, *next_wbuf;
     struct vdagent_virtio_port *vport = *vportp;
@@ -132,7 +133,7 @@ void vdagent_virtio_port_destroy(struct vdagent_virtio_port **vportp)
         return;
 
     if (vport->disconnect_callback)
-        vport->disconnect_callback(vport);
+        vport->disconnect_callback(vport, by_user);
 
     wbuf = vport->write_buf;
     while (wbuf) {
@@ -151,6 +152,11 @@ void vdagent_virtio_port_destroy(struct vdagent_virtio_port **vportp)
     *vportp = NULL;
 }
 
+void vdagent_virtio_port_destroy(struct vdagent_virtio_port **vportp)
+{
+    virtio_port_destroy(vportp, TRUE);
+}
+
 int vdagent_virtio_port_fill_fds(struct vdagent_virtio_port *vport,
         fd_set *readfds, fd_set *writefds)
 {
@@ -321,7 +327,7 @@ static void vdagent_virtio_port_do_chunk(struct vdagent_virtio_port **vportp)
                 port->message_data = malloc(port->message_header.size);
                 if (!port->message_data) {
                     syslog(LOG_ERR, "out of memory, disconnecting virtio");
-                    vdagent_virtio_port_destroy(vportp);
+                    virtio_port_destroy(vportp, FALSE);
                     return;
                 }
             }
@@ -335,7 +341,7 @@ static void vdagent_virtio_port_do_chunk(struct vdagent_virtio_port **vportp)
 
         if (avail > read) {
             syslog(LOG_ERR, "chunk larger than message, lost sync?");
-            vdagent_virtio_port_destroy(vportp);
+            virtio_port_destroy(vportp, FALSE);
             return;
         }
 
@@ -353,7 +359,7 @@ static void vdagent_virtio_port_do_chunk(struct vdagent_virtio_port **vportp)
                 int r = vport->read_callback(vport, vport->chunk_header.port,
                                  &port->message_header, port->message_data);
                 if (r == -1) {
-                    vdagent_virtio_port_destroy(vportp);
+                    virtio_port_destroy(vportp, TRUE);
                     return;
                 }
             }
@@ -420,7 +426,7 @@ static void vdagent_virtio_port_do_read(struct vdagent_virtio_port **vportp)
         return;
     }
     if (n <= 0) {
-        vdagent_virtio_port_destroy(vportp);
+        virtio_port_destroy(vportp, FALSE);
         return;
     }
     vport->opening = 0;
@@ -433,13 +439,13 @@ static void vdagent_virtio_port_do_read(struct vdagent_virtio_port **vportp)
             if (vport->chunk_header.size > VD_AGENT_MAX_DATA_SIZE) {
                 syslog(LOG_ERR, "chunk size %u too large",
                        vport->chunk_header.size);
-                vdagent_virtio_port_destroy(vportp);
+                virtio_port_destroy(vportp, FALSE);
                 return;
             }
             if (vport->chunk_header.port >= VDP_END_PORT) {
                 syslog(LOG_ERR, "chunk port %u out of range",
                        vport->chunk_header.port);
-                vdagent_virtio_port_destroy(vportp);
+                virtio_port_destroy(vportp, FALSE);
                 return;
             }
         }
@@ -487,7 +493,7 @@ static void vdagent_virtio_port_do_write(struct vdagent_virtio_port **vportp)
         if (errno == EINTR)
             return;
         syslog(LOG_ERR, "writing to vdagent virtio port: %m");
-        vdagent_virtio_port_destroy(vportp);
+        virtio_port_destroy(vportp, FALSE);
         return;
     }
     if (n > 0)
diff --git a/src/vdagentd/virtio-port.h b/src/vdagentd/virtio-port.h
index f899e30..3c701d6 100644
--- a/src/vdagentd/virtio-port.h
+++ b/src/vdagentd/virtio-port.h
@@ -41,14 +41,14 @@ typedef int (*vdagent_virtio_port_read_callback)(
     uint8_t *data);
 
 /* Callbacks with this type will be called when the port is disconnected.
+   If the disconnect is initiated by calling vdagent_virtio_port_destroy()
+   or by returning -1 from the vdagent_virtio_port_read_callback,
+   @by_user is set to TRUE, otherwise FALSE.
    Note:
    1) vdagent_virtio_port will destroy the port in question itself after
-      this callback has completed!
-   2) This callback is always called, even if the disconnect is initiated
-      by the vdagent_virtio_port user through returning -1 from a read
-      callback, or by explicitly calling vdagent_virtio_port_destroy */
+      this callback has completed! */
 typedef void (*vdagent_virtio_port_disconnect_callback)(
-    struct vdagent_virtio_port *conn);
+    struct vdagent_virtio_port *conn, gboolean by_user);
 
 
 /* Create a vdagent virtio port object for port portname */
-- 
2.17.1

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