Changeset 313 for trunk/kernel/vfs/vfs.h

Timestamp:

Aug 2, 2017, 3:24:57 PM (7 years ago)

Author:

alain

Message:

RSeveral modifs in the page-fault handling.

File:

• trunk/kernel/vfs/vfs.h (modified) (1 diff)

trunk/kernel/vfs/vfs.h

@@ -732 +732 @@
 
 /****************************************************************************************** 
- * This function moves <size> bytes between the file identified by the open file descriptor
- * <file_xp> and a local kernel or user <buffer>, as defined by the <is_user> argument,
- * and taken into account the offset in <file_xp>.
- * The transfer direction is defined by the <to_buffer> argument.
+ * This function moves <size> bytes between a remote file mapper, identified by the 
+ * <file_xp> argument, and a - possibly distributed - user space <buffer>, taken into 
+ * account the offset in <file_xp>. The transfer direction is defined by <to_buffer>.
+ * This function is called by the sys_read() and sys_write() system calls.
  ******************************************************************************************
  * @ to_buffer : mapper -> buffer if true / buffer -> mapper if false. 
- * @ is_user   : user space buffer if true / local kernel buffer if false. 
  * @ file_xp   : extended pointer on the remote file descriptor.
- * @ buffer    : local pointer on buffer.
+ * @ buffer    : user space pointer on buffer (can be physically distributed).
  * @ size      : requested number of bytes from offset.
  * @ returns number of bytes actually transfered / -1 if error.
  *****************************************************************************************/
-error_t vfs_move( bool_t   to_buffer,
-                  bool_t   is_user,
-                  xptr_t   file_xp, 
-                  void   * buffer,
-                  uint32_t size );
+error_t vfs_user_move( bool_t   to_buffer,
+                       xptr_t   file_xp, 
+                       void   * buffer,
+                       uint32_t size );
 
 /******************************************************************************************