afc571b1a6
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
98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
/*-
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* Copyright (c) 2013 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <machine/elf.h>
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#include <stand.h>
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#include <bootstrap.h>
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#include <loader.h>
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#include <mips.h>
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static int beri_arch_autoload(void);
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static ssize_t beri_arch_copyin(const void *src, vm_offset_t va, size_t len);
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static ssize_t beri_arch_copyout(vm_offset_t va, void *dst, size_t len);
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static uint64_t beri_arch_loadaddr(u_int type, void *data, uint64_t addr);
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static ssize_t beri_arch_readin(readin_handle_t fd, vm_offset_t va, size_t len);
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struct arch_switch archsw = {
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.arch_autoload = beri_arch_autoload,
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.arch_getdev = beri_arch_getdev,
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.arch_copyin = beri_arch_copyin,
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.arch_copyout = beri_arch_copyout,
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.arch_loadaddr = beri_arch_loadaddr,
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.arch_readin = beri_arch_readin,
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};
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static int
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beri_arch_autoload(void)
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{
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return (0);
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}
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static ssize_t
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beri_arch_copyin(const void *src, vm_offset_t va, size_t len)
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{
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memcpy((void *)va, src, len);
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return (len);
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}
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static ssize_t
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beri_arch_copyout(vm_offset_t va, void *dst, size_t len)
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{
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memcpy(dst, (void *)va, len);
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return (len);
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}
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static uint64_t
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beri_arch_loadaddr(u_int type, void *data, uint64_t addr)
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{
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uint64_t align;
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/* Align ELF objects at page boundaries; others at cache lines. */
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align = (type == LOAD_ELF) ? PAGE_SIZE : CACHE_LINE_SIZE;
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return (roundup2(addr, align));
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}
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static ssize_t
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beri_arch_readin(readin_handle_t fd, vm_offset_t va, size_t len)
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{
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return (VECTX_READ(fd, (void *)va, len));
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}
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