nbd: Move nbd_read_eof() to nbd/client.c

The only caller of nbd_read_eof() is nbd_receive_reply(), so it doesn't
have to live in the header file, but can move next to its caller.

Also add the missing coroutine_fn to the function and its caller.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

include/block/nbd.h

@@ -300,7 +300,8 @@ int nbd_receive_export_list(QIOChannel *ioc, QCryptoTLSCreds *tlscreds,
 int nbd_init(int fd, QIOChannelSocket *sioc, NBDExportInfo *info,
              Error **errp);
 int nbd_send_request(QIOChannel *ioc, NBDRequest *request);
-int nbd_receive_reply(QIOChannel *ioc, NBDReply *reply, Error **errp);
+int coroutine_fn nbd_receive_reply(QIOChannel *ioc, NBDReply *reply,
+                                   Error **errp);
 int nbd_client(int fd);
 int nbd_disconnect(int fd);
 int nbd_errno_to_system_errno(int err);

nbd/client.c

@@ -1387,12 +1387,32 @@ static int nbd_receive_structured_reply_chunk(QIOChannel *ioc,
     return 0;
 }
 
+/* nbd_read_eof
+ * Tries to read @size bytes from @ioc.
+ * Returns 1 on success
+ *         0 on eof, when no data was read (errp is not set)
+ *         negative errno on failure (errp is set)
+ */
+static inline int coroutine_fn
+nbd_read_eof(QIOChannel *ioc, void *buffer, size_t size, Error **errp)
+{
+    int ret;
+
+    assert(size);
+    ret = qio_channel_read_all_eof(ioc, buffer, size, errp);
+    if (ret < 0) {
+        ret = -EIO;
+    }
+    return ret;
+}
+
 /* nbd_receive_reply
  * Returns 1 on success
  *         0 on eof, when no data was read (errp is not set)
  *         negative errno on failure (errp is set)
  */
-int nbd_receive_reply(QIOChannel *ioc, NBDReply *reply, Error **errp)
+int coroutine_fn nbd_receive_reply(QIOChannel *ioc, NBDReply *reply,
+                                   Error **errp)
 {
     int ret;
     const char *type;

nbd/nbd-internal.h

@@ -64,25 +64,6 @@
 #define NBD_SET_TIMEOUT             _IO(0xab, 9)
 #define NBD_SET_FLAGS               _IO(0xab, 10)
 
-/* nbd_read_eof
- * Tries to read @size bytes from @ioc.
- * Returns 1 on success
- *         0 on eof, when no data was read (errp is not set)
- *         negative errno on failure (errp is set)
- */
-static inline int nbd_read_eof(QIOChannel *ioc, void *buffer, size_t size,
-                               Error **errp)
-{
-    int ret;
-
-    assert(size);
-    ret = qio_channel_read_all_eof(ioc, buffer, size, errp);
-    if (ret < 0) {
-        ret = -EIO;
-    }
-    return ret;
-}
-
 /* nbd_write
  * Writes @size bytes to @ioc. Returns 0 on success.
  */