mirror of https://github.com/hak5/openwrt.git
Andy Boyett
parent
aaf139232a
commit
1a680734c2
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@ -748,443 +748,6 @@
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-yaffs-y += yaffs_mtdif1.o yaffs_packedtags1.o
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-yaffs-y += yaffs_mtdif.o yaffs_mtdif2.o
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+yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o
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--- a/fs/yaffs2/yaffs_mtdif1-compat.c
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+++ /dev/null
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@@ -1,434 +0,0 @@
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-From ian@brightstareng.com Fri May 18 15:06:49 2007
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-From ian@brightstareng.com Fri May 18 15:08:21 2007
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-Received: from 206.173.66.57.ptr.us.xo.net ([206.173.66.57] helo=zebra.brightstareng.com)
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- by apollo.linkchoose.co.uk with esmtp (Exim 4.60)
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- (envelope-from <ian@brightstareng.com>)
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- id 1Hp380-00011e-T6
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- for david.goodenough@linkchoose.co.uk; Fri, 18 May 2007 15:08:21 +0100
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-Received: from localhost (localhost.localdomain [127.0.0.1])
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- by zebra.brightstareng.com (Postfix) with ESMTP
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- id 4819F28C004; Fri, 18 May 2007 10:07:49 -0400 (EDT)
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-Received: from zebra.brightstareng.com ([127.0.0.1])
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- by localhost (zebra [127.0.0.1]) (amavisd-new, port 10024) with ESMTP
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- id 05328-06; Fri, 18 May 2007 10:07:16 -0400 (EDT)
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-Received: from pippin (unknown [192.168.1.25])
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- by zebra.brightstareng.com (Postfix) with ESMTP
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- id 8BEF528C1BC; Fri, 18 May 2007 10:06:53 -0400 (EDT)
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-From: Ian McDonnell <ian@brightstareng.com>
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-To: David Goodenough <david.goodenough@linkchoose.co.uk>
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-Subject: Re: something tested this time -- yaffs_mtdif1-compat.c
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-Date: Fri, 18 May 2007 10:06:49 -0400
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-User-Agent: KMail/1.9.1
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-References: <200705142207.06909.ian@brightstareng.com> <200705171131.53536.ian@brightstareng.com> <200705181334.32166.david.goodenough@linkchoose.co.uk>
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-In-Reply-To: <200705181334.32166.david.goodenough@linkchoose.co.uk>
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-Cc: Andrea Conti <alyf@alyf.net>,
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- Charles Manning <manningc2@actrix.gen.nz>
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-MIME-Version: 1.0
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-Content-Type: Multipart/Mixed;
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- boundary="Boundary-00=_5LbTGmt62YoutxM"
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-Message-Id: <200705181006.49860.ian@brightstareng.com>
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-X-Virus-Scanned: by amavisd-new at brightstareng.com
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-Status: R
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-X-Status: NT
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-X-KMail-EncryptionState:
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-X-KMail-SignatureState:
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-X-KMail-MDN-Sent:
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-
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---Boundary-00=_5LbTGmt62YoutxM
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-Content-Type: text/plain;
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- charset="iso-8859-15"
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-Content-Transfer-Encoding: 7bit
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-Content-Disposition: inline
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-
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-David, Andrea,
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-
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-On Friday 18 May 2007 08:34, you wrote:
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-> Yea team. With this fix in place (I put it in the wrong place
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-> at first) I can now mount and ls the Yaffs partition without
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-> an error messages!
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-
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-Good news!
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-
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-Attached is a newer yaffs_mtdif1.c with a bandaid to help the
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-2.6.18 and 2.6.19 versions of MTD not trip on the oob read.
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-See the LINUX_VERSION_CODE conditional in
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-nandmtd1_ReadChunkWithTagsFromNAND.
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-
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--imcd
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-
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---Boundary-00=_5LbTGmt62YoutxM
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-Content-Type: text/x-csrc;
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- charset="iso-8859-15";
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- name="yaffs_mtdif1.c"
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-Content-Transfer-Encoding: 7bit
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-Content-Disposition: attachment;
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- filename="yaffs_mtdif1.c"
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-
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-/*
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- * YAFFS: Yet another FFS. A NAND-flash specific file system.
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- * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND.
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- *
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- * Copyright (C) 2002 Aleph One Ltd.
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- * for Toby Churchill Ltd and Brightstar Engineering
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- */
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-
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-/*
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- * This module provides the interface between yaffs_nand.c and the
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- * MTD API. This version is used when the MTD interface supports the
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- * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
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- * and we have small-page NAND device.
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- *
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- * These functions are invoked via function pointers in yaffs_nand.c.
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- * This replaces functionality provided by functions in yaffs_mtdif.c
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- * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
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- * called in yaffs_mtdif.c when the function pointers are NULL.
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- * We assume the MTD layer is performing ECC (useNANDECC is true).
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- */
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-
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-#include "yportenv.h"
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-#include "yaffs_guts.h"
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-#include "yaffs_packedtags1.h"
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-#include "yaffs_tagscompat.h" // for yaffs_CalcTagsECC
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-
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-#include "linux/kernel.h"
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-#include "linux/version.h"
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-#include "linux/types.h"
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-#include "linux/mtd/mtd.h"
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-
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-/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
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-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
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-
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-const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1-compat.c 13022 2008-10-22 06:51:06Z nbd $";
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-
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-#ifndef CONFIG_YAFFS_9BYTE_TAGS
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-# define YTAG1_SIZE 8
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-#else
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-# define YTAG1_SIZE 9
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-#endif
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-
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-#if 0
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-/* Use the following nand_ecclayout with MTD when using
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- * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
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- * If you have existing Yaffs images and the byte order differs from this,
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- * adjust 'oobfree' to match your existing Yaffs data.
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- *
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- * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
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- * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
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- * the 9th byte.
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- *
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- * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
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- * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
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- * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
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- * byte and B is the small-page bad-block indicator byte.
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- */
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-static struct nand_ecclayout nand_oob_16 = {
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- .eccbytes = 6,
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- .eccpos = { 8, 9, 10, 13, 14, 15 },
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- .oobavail = 9,
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- .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
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-};
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-#endif
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-
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-/* Write a chunk (page) of data to NAND.
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- *
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- * Caller always provides ExtendedTags data which are converted to a more
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- * compact (packed) form for storage in NAND. A mini-ECC runs over the
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- * contents of the tags meta-data; used to valid the tags when read.
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- *
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- * - Pack ExtendedTags to PackedTags1 form
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- * - Compute mini-ECC for PackedTags1
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- * - Write data and packed tags to NAND.
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- *
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- * Note: Due to the use of the PackedTags1 meta-data which does not include
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- * a full sequence number (as found in the larger PackedTags2 form) it is
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- * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
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- * discarded and dirty. This is not ideal: newer NAND parts are supposed
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- * to be written just once. When Yaffs performs this operation, this
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- * function is called with a NULL data pointer -- calling MTD write_oob
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- * without data is valid usage (2.6.17).
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- *
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- * Any underlying MTD error results in YAFFS_FAIL.
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- * Returns YAFFS_OK or YAFFS_FAIL.
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- */
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-int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
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- int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
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-{
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- struct mtd_info * mtd = dev->genericDevice;
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- int chunkBytes = dev->nDataBytesPerChunk;
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- loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
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- struct mtd_oob_ops ops;
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- yaffs_PackedTags1 pt1;
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- int retval;
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-
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- /* we assume that PackedTags1 and yaffs_Tags are compatible */
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- compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
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- compile_time_assertion(sizeof(yaffs_Tags) == 8);
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-
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- yaffs_PackTags1(&pt1, etags);
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- yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
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-
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- /* When deleting a chunk, the upper layer provides only skeletal
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- * etags, one with chunkDeleted set. However, we need to update the
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- * tags, not erase them completely. So we use the NAND write property
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- * that only zeroed-bits stick and set tag bytes to all-ones and
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- * zero just the (not) deleted bit.
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- */
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-#ifndef CONFIG_YAFFS_9BYTE_TAGS
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- if (etags->chunkDeleted) {
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- memset(&pt1, 0xff, 8);
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- /* clear delete status bit to indicate deleted */
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- pt1.deleted = 0;
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- }
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-#else
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- ((__u8 *)&pt1)[8] = 0xff;
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- if (etags->chunkDeleted) {
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- memset(&pt1, 0xff, 8);
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- /* zero pageStatus byte to indicate deleted */
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- ((__u8 *)&pt1)[8] = 0;
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- }
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-#endif
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-
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- memset(&ops, 0, sizeof(ops));
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- ops.mode = MTD_OOB_AUTO;
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- ops.len = (data) ? chunkBytes : 0;
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- ops.ooblen = YTAG1_SIZE;
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- ops.datbuf = (__u8 *)data;
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- ops.oobbuf = (__u8 *)&pt1;
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-
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- retval = mtd->write_oob(mtd, addr, &ops);
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- if (retval) {
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- yaffs_trace(YAFFS_TRACE_MTD,
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- "write_oob failed, chunk %d, mtd error %d\n",
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- chunkInNAND, retval);
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- }
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- return retval ? YAFFS_FAIL : YAFFS_OK;
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-}
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-
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-/* Return with empty ExtendedTags but add eccResult.
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- */
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-static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
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-{
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- if (etags) {
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- memset(etags, 0, sizeof(*etags));
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- etags->eccResult = eccResult;
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- }
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- return retval;
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-}
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-
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-/* Read a chunk (page) from NAND.
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- *
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- * Caller expects ExtendedTags data to be usable even on error; that is,
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- * all members except eccResult and blockBad are zeroed.
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- *
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- * - Check ECC results for data (if applicable)
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- * - Check for blank/erased block (return empty ExtendedTags if blank)
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- * - Check the PackedTags1 mini-ECC (correct if necessary/possible)
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- * - Convert PackedTags1 to ExtendedTags
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- * - Update eccResult and blockBad members to refect state.
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- *
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- * Returns YAFFS_OK or YAFFS_FAIL.
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- */
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-int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
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- int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
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-{
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- struct mtd_info * mtd = dev->genericDevice;
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- int chunkBytes = dev->nDataBytesPerChunk;
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- loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
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- int eccres = YAFFS_ECC_RESULT_NO_ERROR;
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- struct mtd_oob_ops ops;
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- yaffs_PackedTags1 pt1;
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- int retval;
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- int deleted;
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-
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- memset(&ops, 0, sizeof(ops));
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- ops.mode = MTD_OOB_AUTO;
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- ops.len = (data) ? chunkBytes : 0;
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- ops.ooblen = YTAG1_SIZE;
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- ops.datbuf = data;
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- ops.oobbuf = (__u8 *)&pt1;
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-
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-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
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- /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
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- * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
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- */
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- ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
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-#endif
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- /* Read page and oob using MTD.
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- * Check status and determine ECC result.
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- */
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- retval = mtd->read_oob(mtd, addr, &ops);
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- if (retval) {
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- yaffs_trace(YAFFS_TRACE_MTD,
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- "read_oob failed, chunk %d, mtd error %d\n",
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- chunkInNAND, retval);
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- }
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-
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- switch (retval) {
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- case 0:
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- /* no error */
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- break;
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-
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- case -EUCLEAN:
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- /* MTD's ECC fixed the data */
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- eccres = YAFFS_ECC_RESULT_FIXED;
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- dev->eccFixed++;
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- break;
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-
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- case -EBADMSG:
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- /* MTD's ECC could not fix the data */
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- dev->eccUnfixed++;
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- /* fall into... */
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- default:
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- rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
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- etags->blockBad = (mtd->block_isbad)(mtd, addr);
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- return YAFFS_FAIL;
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- }
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-
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- /* Check for a blank/erased chunk.
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- */
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- if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
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- /* when blank, upper layers want eccResult to be <= NO_ERROR */
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- return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
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- }
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-
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-#ifndef CONFIG_YAFFS_9BYTE_TAGS
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- /* Read deleted status (bit) then return it to it's non-deleted
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- * state before performing tags mini-ECC check. pt1.deleted is
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- * inverted.
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- */
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- deleted = !pt1.deleted;
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- pt1.deleted = 1;
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-#else
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- (void) deleted; /* not used */
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-#endif
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-
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- /* Check the packed tags mini-ECC and correct if necessary/possible.
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- */
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- retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
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- switch (retval) {
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- case 0:
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- /* no tags error, use MTD result */
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- break;
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- case 1:
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- /* recovered tags-ECC error */
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- dev->tagsEccFixed++;
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- eccres = YAFFS_ECC_RESULT_FIXED;
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- break;
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- default:
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- /* unrecovered tags-ECC error */
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- dev->tagsEccUnfixed++;
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- return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
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- }
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-
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- /* Unpack the tags to extended form and set ECC result.
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- * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
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- */
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- pt1.shouldBeFF = 0xFFFFFFFF;
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- yaffs_UnpackTags1(etags, &pt1);
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- etags->eccResult = eccres;
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-
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- /* Set deleted state.
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- */
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-#ifndef CONFIG_YAFFS_9BYTE_TAGS
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- etags->chunkDeleted = deleted;
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-#else
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- etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
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-#endif
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- return YAFFS_OK;
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-}
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-
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-/* Mark a block bad.
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- *
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- * This is a persistant state.
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- * Use of this function should be rare.
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- *
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- * Returns YAFFS_OK or YAFFS_FAIL.
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- */
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-int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
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-{
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- struct mtd_info * mtd = dev->genericDevice;
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- int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
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- int retval;
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-
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- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
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-
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- retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
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- return (retval) ? YAFFS_FAIL : YAFFS_OK;
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-}
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-
|
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-/* Check any MTD prerequists.
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- *
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- * Returns YAFFS_OK or YAFFS_FAIL.
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- */
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-static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
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-{
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- /* 2.6.18 has mtd->ecclayout->oobavail */
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- /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
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- int oobavail = mtd->ecclayout->oobavail;
|
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-
|
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- if (oobavail < YTAG1_SIZE) {
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- yaffs_trace(YAFFS_TRACE_ERROR,
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- "mtd device has only %d bytes for tags, need %d",
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- oobavail, YTAG1_SIZE);
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- return YAFFS_FAIL;
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- }
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- return YAFFS_OK;
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-}
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-
|
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-/* Query for the current state of a specific block.
|
||||
- *
|
||||
- * Examine the tags of the first chunk of the block and return the state:
|
||||
- * - YAFFS_BLOCK_STATE_DEAD, the block is marked bad
|
||||
- * - YAFFS_BLOCK_STATE_NEEDS_SCANNING, the block is in use
|
||||
- * - YAFFS_BLOCK_STATE_EMPTY, the block is clean
|
||||
- *
|
||||
- * Always returns YAFFS_OK.
|
||||
- */
|
||||
-int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
|
||||
- yaffs_BlockState * pState, int *pSequenceNumber)
|
||||
-{
|
||||
- struct mtd_info * mtd = dev->genericDevice;
|
||||
- int chunkNo = blockNo * dev->nChunksPerBlock;
|
||||
- yaffs_ExtendedTags etags;
|
||||
- int state = YAFFS_BLOCK_STATE_DEAD;
|
||||
- int seqnum = 0;
|
||||
- int retval;
|
||||
-
|
||||
- /* We don't yet have a good place to test for MTD config prerequists.
|
||||
- * Do it here as we are called during the initial scan.
|
||||
- */
|
||||
- if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) {
|
||||
- return YAFFS_FAIL;
|
||||
- }
|
||||
-
|
||||
- retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags);
|
||||
- if (etags.blockBad) {
|
||||
- yaffs_trace(YAFFS_TRACE_BAD_BLOCKS,
|
||||
- "block %d is marked bad", blockNo);
|
||||
- state = YAFFS_BLOCK_STATE_DEAD;
|
||||
- }
|
||||
- else if (etags.chunkUsed) {
|
||||
- state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
|
||||
- seqnum = etags.sequenceNumber;
|
||||
- }
|
||||
- else {
|
||||
- state = YAFFS_BLOCK_STATE_EMPTY;
|
||||
- }
|
||||
-
|
||||
- *pState = state;
|
||||
- *pSequenceNumber = seqnum;
|
||||
-
|
||||
- /* query always succeeds */
|
||||
- return YAFFS_OK;
|
||||
-}
|
||||
-
|
||||
-#endif /*KERNEL_VERSION*/
|
||||
-
|
||||
---Boundary-00=_5LbTGmt62YoutxM--
|
||||
-
|
||||
-
|
||||
-
|
||||
--- a/fs/yaffs2/yaffs_fs.c
|
||||
+++ b/fs/yaffs2/yaffs_fs.c
|
||||
@@ -32,7 +32,7 @@
|
||||
|
|
|
|||
Loading…
Reference in New Issue