svn commit: r358767 - head/stand/common

[Simon J. Gerraty]

Author: sjg
Date: Sun Mar  8 18:48:01 2020
New Revision: 358767
URL: https://svnweb.freebsd.org/changeset/base/358767

Log:
  veloader use vectx API for kernel and modules
  
  The vectx API, computes the hash for verifying a file as it is read.
  This avoids the overhead of reading files twice - once to verify, then
  again to load.
  
  For doing an install via loader, avoiding the need to rewind
  large files is critical.
  
  This API is only used for modules, kernel and mdimage as these are the
  biggest files read by the loader.
  The reduction in boot time depends on how expensive the I/O is
  on any given platform.  On a fast VM we see 6% improvement.
  
  For install via loader the first file to be verified is likely to be the
  kernel, so some of the prep work (finding manifest etc) done by
  verify_file() needs to be factored so it can be reused for
  vectx_open().
  
  For missing or unrecognized fingerprint entries, we fail
  in vectx_open() unless verifying is disabled.
  
  Otherwise fingerprint check happens in vectx_close() and
  since this API is only used for files which must be verified
  (VE_MUST) we panic if we get an incorrect hash.
  
  Reviewed by:	imp,tsoome
  MFC after:	1 week
  Sponsored by:	Juniper Networks
  Differential Revision:	https://reviews.freebsd.org//D23827

Added:
  head/stand/common/readin.h   (contents, props changed)

Added: head/stand/common/readin.h
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/stand/common/readin.h	Sun Mar  8 18:48:01 2020	(r358767)
@@ -0,0 +1,43 @@
+/*-
+ * Copyright (c) 2020, Juniper Networks, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+#ifndef _READIN_H_
+#define	_READIN_H_
+
+#ifdef LOADER_VERIEXEC
+#include <verify_file.h>
+#endif
+#ifdef LOADER_VERIEXEC_VECTX
+typedef struct vectx * readin_handle_t;
+#define VECTX_READ vectx_read
+#define VECTX_LSEEK vectx_lseek
+#else
+typedef int readin_handle_t;
+#define VECTX_READ read
+#define VECTX_LSEEK lseek
+#endif
+
+#endif	/* !_READIN_H_ */