[gvfs] afp: Don't create write requests bigger than the maximum request size.

[Carl-Anton Ingmarsson <carlantoni src gnome org>]

commit 01fd300d7a015031827ba947c6cf38416ed8dd1a
Author: Carl-Anton Ingmarsson <ca ingmarsson gmail com>
Date:   Thu Aug 9 20:22:17 2012 +0200

    afp: Don't create write requests bigger than the maximum request size.

 daemon/gvfsafpconnection.c |    6 ++++++
 daemon/gvfsafpconnection.h |    4 ++++
 daemon/gvfsafpserver.c     |   30 +++++++++++++++++++++++-------
 daemon/gvfsafpserver.h     |    2 ++
 daemon/gvfsafpvolume.c     |    6 ++++--
 5 files changed, 39 insertions(+), 9 deletions(-)
---
diff --git a/daemon/gvfsafpconnection.c b/daemon/gvfsafpconnection.c
index 34b7b31..e35dae3 100644
--- a/daemon/gvfsafpconnection.c
+++ b/daemon/gvfsafpconnection.c
@@ -1920,3 +1920,9 @@ g_vfs_afp_query_server_info (GSocketConnectable *addr,
   return g_vfs_afp_reply_new (dsi_header.errorCode, data,
                               dsi_header.totalDataLength, TRUE);
 }
+
+guint32
+g_vfs_afp_connection_get_max_request_size (GVfsAfpConnection *afp_connection)
+{
+  g_return_val_if_fail (G_VFS_IS_AFP_CONNECTION (afp_connection), 0);
+}
diff --git a/daemon/gvfsafpconnection.h b/daemon/gvfsafpconnection.h
index a524447..367f983 100644
--- a/daemon/gvfsafpconnection.h
+++ b/daemon/gvfsafpconnection.h
@@ -366,6 +366,10 @@ void               g_vfs_afp_connection_send_command     (GVfsAfpConnection   *a
                                                           GAsyncReadyCallback  callback,
                                                           GCancellable        *cancellable,                                                           
                                                           gpointer             user_data);
+
+
+guint32            g_vfs_afp_connection_get_max_request_size  (GVfsAfpConnection *afp_connection);
+
 G_END_DECLS
 
 #endif /* _GVFSAFPCONNECTION_H_ */
diff --git a/daemon/gvfsafpserver.c b/daemon/gvfsafpserver.c
index ec50c30..a224249 100644
--- a/daemon/gvfsafpserver.c
+++ b/daemon/gvfsafpserver.c
@@ -1183,7 +1183,7 @@ done:
   return res; 
 }
 
-/*
+/**
  * g_vfs_afp_server_get_info:
  * 
  * @server: a #GVfsAfpServer
@@ -1205,7 +1205,23 @@ g_vfs_afp_server_get_info (GVfsAfpServer *server)
   return &priv->info;
 }
 
-/*
+/**
+ * g_vfs_afp_server_get_max_request_size:
+ * @server: a #GVfsAfpServer
+ * 
+ * Get the maximum request size the server supports.
+ * 
+ * Returns: The maximum request size the server supports.
+ */
+guint32
+g_vfs_afp_server_get_max_request_size (GVfsAfpServer *server)
+{
+  g_return_val_if_fail (G_VFS_IS_AFP_SERVER (server), 0);
+  
+  return g_vfs_afp_connection_get_max_request_size (server->priv->conn);
+}
+
+/**
  * g_vfs_afp_server_time_to_local_time:
  * 
  * @server: a #GVfsAfpServer
@@ -1301,7 +1317,7 @@ invalid_reply:
   goto done;
 }
 
-/*
+/**
  * g_vfs_afp_server_get_volumes:
  * 
  * @server: a #GVfsAfpServer
@@ -1332,7 +1348,7 @@ g_vfs_afp_server_get_volumes (GVfsAfpServer       *server,
                                      cancellable, simple);
 }
 
-/*
+/**
  * g_vfs_afp_server_get_volumes_finish:
  * 
  * @server: a #GVfsAfpServer.
@@ -1503,7 +1519,7 @@ g_vfs_afp_server_fill_info (GVfsAfpServer *server,
     {
       guint16 offspring_count;
 
-      g_vfs_afp_reply_read_uint16 (reply, &offspring_count);
+      REPLY_READ_UINT16 (reply, &offspring_count);
       g_file_info_set_attribute_uint32 (info, G_FILE_ATTRIBUTE_AFP_CHILDREN_COUNT,
                                         offspring_count);
     }
@@ -1692,7 +1708,7 @@ invalid_reply:
   goto done;
 }
 
-/*
+/**
  * g_vfs_afp_server_map_id:
  * 
  * @server: a #GVfsAfpServer.
@@ -1746,7 +1762,7 @@ g_vfs_afp_server_map_id (GVfsAfpServer       *server,
   g_object_unref (comm);
 }
 
-/*
+/**
  * g_vfs_afp_server_map_id_finish:
  * 
  * @server: a #GVfsAfpServer.
diff --git a/daemon/gvfsafpserver.h b/daemon/gvfsafpserver.h
index 2a57f99..9cb1426 100644
--- a/daemon/gvfsafpserver.h
+++ b/daemon/gvfsafpserver.h
@@ -94,6 +94,8 @@ gint64             g_vfs_afp_server_time_to_local_time   (GVfsAfpServer *server,
 const
 GVfsAfpServerInfo* g_vfs_afp_server_get_info             (GVfsAfpServer *server);
 
+guint32            g_vfs_afp_server_get_max_request_size (GVfsAfpServer *server);
+
 typedef struct _GVfsAfpVolumeData GVfsAfpVolumeData;
 struct _GVfsAfpVolumeData
 {
diff --git a/daemon/gvfsafpvolume.c b/daemon/gvfsafpvolume.c
index fe9eacb..1a2eac0 100644
--- a/daemon/gvfsafpvolume.c
+++ b/daemon/gvfsafpvolume.c
@@ -2691,7 +2691,7 @@ g_vfs_afp_volume_write_to_fork (GVfsAfpVolume       *volume,
                                 gpointer             user_data)
 {
   GVfsAfpCommand *comm;
-  guint32 req_count;
+  guint32 max_req_count, req_count;
   GSimpleAsyncResult *simple;
 
   g_return_if_fail (G_VFS_IS_AFP_VOLUME (volume));
@@ -2704,11 +2704,13 @@ g_vfs_afp_volume_write_to_fork (GVfsAfpVolume       *volume,
   g_vfs_afp_command_put_int16 (comm, fork_refnum);
   /* Offset */
   g_vfs_afp_command_put_int64 (comm, offset);
+  
   /* ReqCount */
+  max_req_count = g_vfs_afp_server_get_max_request_size (volume->priv->server) - 20;
   req_count = MIN (buffer_size, G_MAXUINT32);
   g_vfs_afp_command_put_int64 (comm, req_count);
 
-  g_vfs_afp_command_set_buffer (comm, buffer, buffer_size);
+  g_vfs_afp_command_set_buffer (comm, buffer, req_count);
 
   simple = g_simple_async_result_new (G_OBJECT (volume), callback, user_data,
                                       g_vfs_afp_volume_write_to_fork);