[kernel] generic/2.6.28: fix yaffs cvs patch

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@14261 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 0 insertions, 437 deletions

diff --git a/target/linux/generic-2.6/patches-2.6.28/511-yaffs-cvs-2009-01-23.patch b/target/linux/generic-2.6/patches-2.6.28/511-yaffs-cvs-2009-01-23.patch
index 6193e89211..9bb0826fad 100644
--- a/target/linux/generic-2.6/patches-2.6.28/511-yaffs-cvs-2009-01-23.patch
+++ b/target/linux/generic-2.6/patches-2.6.28/511-yaffs-cvs-2009-01-23.patch
@@ -748,443 +748,6 @@
 -yaffs-y += yaffs_mtdif1.o yaffs_packedtags1.o
 -yaffs-y += yaffs_mtdif.o yaffs_mtdif2.o
 +yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o
---- a/fs/yaffs2/yaffs_mtdif1-compat.c
-+++ /dev/null
-@@ -1,434 +0,0 @@
--From ian@brightstareng.com Fri May 18 15:06:49 2007
--From ian@brightstareng.com Fri May 18 15:08:21 2007
--Received: from 206.173.66.57.ptr.us.xo.net ([206.173.66.57] helo=zebra.brightstareng.com)
--	by apollo.linkchoose.co.uk with esmtp (Exim 4.60)
--	(envelope-from <ian@brightstareng.com>)
--	id 1Hp380-00011e-T6
--	for david.goodenough@linkchoose.co.uk; Fri, 18 May 2007 15:08:21 +0100
--Received: from localhost (localhost.localdomain [127.0.0.1])
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--	by zebra.brightstareng.com (Postfix) with ESMTP
--	id 8BEF528C1BC; Fri, 18 May 2007 10:06:53 -0400 (EDT)
--From: Ian McDonnell <ian@brightstareng.com>
--To: David Goodenough <david.goodenough@linkchoose.co.uk>
--Subject: Re: something tested this time -- yaffs_mtdif1-compat.c
--Date: Fri, 18 May 2007 10:06:49 -0400
--User-Agent: KMail/1.9.1
--References: <200705142207.06909.ian@brightstareng.com> <200705171131.53536.ian@brightstareng.com> <200705181334.32166.david.goodenough@linkchoose.co.uk>
--In-Reply-To: <200705181334.32166.david.goodenough@linkchoose.co.uk>
--Cc: Andrea Conti <alyf@alyf.net>,
-- Charles Manning <manningc2@actrix.gen.nz>
--MIME-Version: 1.0
--Content-Type: Multipart/Mixed;
--  boundary="Boundary-00=_5LbTGmt62YoutxM"
--Message-Id: <200705181006.49860.ian@brightstareng.com>
--X-Virus-Scanned: by amavisd-new at brightstareng.com
--Status: R
--X-Status: NT
--X-KMail-EncryptionState:
--X-KMail-SignatureState:
--X-KMail-MDN-Sent:
--
----Boundary-00=_5LbTGmt62YoutxM
--Content-Type: text/plain;
--  charset="iso-8859-15"
--Content-Transfer-Encoding: 7bit
--Content-Disposition: inline
--
--David, Andrea,
--
--On Friday 18 May 2007 08:34, you wrote:
--> Yea team.  With this fix in place (I put it in the wrong place
--> at first) I can now mount and ls the Yaffs partition without
--> an error messages!
--
--Good news!
--
--Attached is a newer yaffs_mtdif1.c with a bandaid to help the
--2.6.18 and 2.6.19 versions of MTD not trip on the oob read.
--See the LINUX_VERSION_CODE conditional in
--nandmtd1_ReadChunkWithTagsFromNAND.
--
---imcd
--
----Boundary-00=_5LbTGmt62YoutxM
--Content-Type: text/x-csrc;
--  charset="iso-8859-15";
--  name="yaffs_mtdif1.c"
--Content-Transfer-Encoding: 7bit
--Content-Disposition: attachment;
--	filename="yaffs_mtdif1.c"
--
--/*
-- * YAFFS: Yet another FFS. A NAND-flash specific file system.
-- * yaffs_mtdif1.c  NAND mtd interface functions for small-page NAND.
-- *
-- * Copyright (C) 2002 Aleph One Ltd.
-- *   for Toby Churchill Ltd and Brightstar Engineering
-- *
-- * This program is free software; you can redistribute it and/or modify
-- * it under the terms of the GNU General Public License version 2 as
-- * published by the Free Software Foundation.
-- */
--
--/*
-- * This module provides the interface between yaffs_nand.c and the
-- * MTD API.  This version is used when the MTD interface supports the
-- * 'mtd_oob_ops' style calls to read_oob and write_oob, circa 2.6.17,
-- * and we have small-page NAND device.
-- *
-- * These functions are invoked via function pointers in yaffs_nand.c.
-- * This replaces functionality provided by functions in yaffs_mtdif.c
-- * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are
-- * called in yaffs_mtdif.c when the function pointers are NULL.
-- * We assume the MTD layer is performing ECC (useNANDECC is true).
-- */
--
--#include "yportenv.h"
--#include "yaffs_guts.h"
--#include "yaffs_packedtags1.h"
--#include "yaffs_tagscompat.h"	// for yaffs_CalcTagsECC
--
--#include "linux/kernel.h"
--#include "linux/version.h"
--#include "linux/types.h"
--#include "linux/mtd/mtd.h"
--
--/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */
--#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
--
--const char *yaffs_mtdif1_c_version = "$Id: yaffs_mtdif1-compat.c 13022 2008-10-22 06:51:06Z nbd $";
--
--#ifndef CONFIG_YAFFS_9BYTE_TAGS
--# define YTAG1_SIZE 8
--#else
--# define YTAG1_SIZE 9
--#endif
--
--#if 0
--/* Use the following nand_ecclayout with MTD when using
-- * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout.
-- * If you have existing Yaffs images and the byte order differs from this,
-- * adjust 'oobfree' to match your existing Yaffs data.
-- *
-- * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the
-- * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to
-- * the 9th byte.
-- *
-- * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5
-- * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P
-- * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus
-- * byte and B is the small-page bad-block indicator byte.
-- */
--static struct nand_ecclayout nand_oob_16 = {
--	.eccbytes = 6,
--	.eccpos = { 8, 9, 10, 13, 14, 15 },
--	.oobavail = 9,
--	.oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
--};
--#endif
--
--/* Write a chunk (page) of data to NAND.
-- *
-- * Caller always provides ExtendedTags data which are converted to a more
-- * compact (packed) form for storage in NAND.  A mini-ECC runs over the
-- * contents of the tags meta-data; used to valid the tags when read.
-- *
-- *  - Pack ExtendedTags to PackedTags1 form
-- *  - Compute mini-ECC for PackedTags1
-- *  - Write data and packed tags to NAND.
-- *
-- * Note: Due to the use of the PackedTags1 meta-data which does not include
-- * a full sequence number (as found in the larger PackedTags2 form) it is
-- * necessary for Yaffs to re-write a chunk/page (just once) to mark it as
-- * discarded and dirty.  This is not ideal: newer NAND parts are supposed
-- * to be written just once.  When Yaffs performs this operation, this
-- * function is called with a NULL data pointer -- calling MTD write_oob
-- * without data is valid usage (2.6.17).
-- *
-- * Any underlying MTD error results in YAFFS_FAIL.
-- * Returns YAFFS_OK or YAFFS_FAIL.
-- */
--int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev,
--	int chunkInNAND, const __u8 * data, const yaffs_ExtendedTags * etags)
--{
--	struct mtd_info * mtd = dev->genericDevice;
--	int chunkBytes = dev->nDataBytesPerChunk;
--	loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
--	struct mtd_oob_ops ops;
--	yaffs_PackedTags1 pt1;
--	int retval;
--
--	/* we assume that PackedTags1 and yaffs_Tags are compatible */
--	compile_time_assertion(sizeof(yaffs_PackedTags1) == 12);
--	compile_time_assertion(sizeof(yaffs_Tags) == 8);
--
--	yaffs_PackTags1(&pt1, etags);
--	yaffs_CalcTagsECC((yaffs_Tags *)&pt1);
--
--	/* When deleting a chunk, the upper layer provides only skeletal
--	 * etags, one with chunkDeleted set.  However, we need to update the
--	 * tags, not erase them completely.  So we use the NAND write property
--	 * that only zeroed-bits stick and set tag bytes to all-ones and
--	 * zero just the (not) deleted bit.
--	 */
--#ifndef CONFIG_YAFFS_9BYTE_TAGS
--	if (etags->chunkDeleted) {
--		memset(&pt1, 0xff, 8);
--		/* clear delete status bit to indicate deleted */
--		pt1.deleted = 0;
--	}
--#else
--	((__u8 *)&pt1)[8] = 0xff;
--	if (etags->chunkDeleted) {
--		memset(&pt1, 0xff, 8);
--		/* zero pageStatus byte to indicate deleted */
--		((__u8 *)&pt1)[8] = 0;
--	}
--#endif
--
--	memset(&ops, 0, sizeof(ops));
--	ops.mode = MTD_OOB_AUTO;
--	ops.len = (data) ? chunkBytes : 0;
--	ops.ooblen = YTAG1_SIZE;
--	ops.datbuf = (__u8 *)data;
--	ops.oobbuf = (__u8 *)&pt1;
--
--	retval = mtd->write_oob(mtd, addr, &ops);
--	if (retval) {
--		yaffs_trace(YAFFS_TRACE_MTD,
--			"write_oob failed, chunk %d, mtd error %d\n",
--			chunkInNAND, retval);
--	}
--	return retval ? YAFFS_FAIL : YAFFS_OK;
--}
--
--/* Return with empty ExtendedTags but add eccResult.
-- */
--static int rettags(yaffs_ExtendedTags * etags, int eccResult, int retval)
--{
--	if (etags) {
--		memset(etags, 0, sizeof(*etags));
--		etags->eccResult = eccResult;
--	}
--	return retval;
--}
--
--/* Read a chunk (page) from NAND.
-- *
-- * Caller expects ExtendedTags data to be usable even on error; that is,
-- * all members except eccResult and blockBad are zeroed.
-- *
-- *  - Check ECC results for data (if applicable)
-- *  - Check for blank/erased block (return empty ExtendedTags if blank)
-- *  - Check the PackedTags1 mini-ECC (correct if necessary/possible)
-- *  - Convert PackedTags1 to ExtendedTags
-- *  - Update eccResult and blockBad members to refect state.
-- *
-- * Returns YAFFS_OK or YAFFS_FAIL.
-- */
--int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev,
--	int chunkInNAND, __u8 * data, yaffs_ExtendedTags * etags)
--{
--	struct mtd_info * mtd = dev->genericDevice;
--	int chunkBytes = dev->nDataBytesPerChunk;
--	loff_t addr = ((loff_t)chunkInNAND) * chunkBytes;
--	int eccres = YAFFS_ECC_RESULT_NO_ERROR;
--	struct mtd_oob_ops ops;
--	yaffs_PackedTags1 pt1;
--	int retval;
--	int deleted;
--
--	memset(&ops, 0, sizeof(ops));
--	ops.mode = MTD_OOB_AUTO;
--	ops.len = (data) ? chunkBytes : 0;
--	ops.ooblen = YTAG1_SIZE;
--	ops.datbuf = data;
--	ops.oobbuf = (__u8 *)&pt1;
--
--#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
--	/* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug;
--	 * help it out with ops.len = ops.ooblen when ops.datbuf == NULL.
--	 */
--	ops.len = (ops.datbuf) ? ops.len : ops.ooblen;
--#endif
--	/* Read page and oob using MTD.
--	 * Check status and determine ECC result.
--	 */
--	retval = mtd->read_oob(mtd, addr, &ops);
--	if (retval) {
--		yaffs_trace(YAFFS_TRACE_MTD,
--			"read_oob failed, chunk %d, mtd error %d\n",
--			chunkInNAND, retval);
--	}
--
--	switch (retval) {
--	case 0:
--		/* no error */
--		break;
--
--	case -EUCLEAN:
--		/* MTD's ECC fixed the data */
--		eccres = YAFFS_ECC_RESULT_FIXED;
--		dev->eccFixed++;
--		break;
--
--	case -EBADMSG:
--		/* MTD's ECC could not fix the data */
--		dev->eccUnfixed++;
--		/* fall into... */
--	default:
--		rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0);
--		etags->blockBad = (mtd->block_isbad)(mtd, addr);
--		return YAFFS_FAIL;
--	}
--
--	/* Check for a blank/erased chunk.
--	 */
--	if (yaffs_CheckFF((__u8 *)&pt1, 8)) {
--		/* when blank, upper layers want eccResult to be <= NO_ERROR */
--		return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK);
--	}
--
--#ifndef CONFIG_YAFFS_9BYTE_TAGS
--	/* Read deleted status (bit) then return it to it's non-deleted
--	 * state before performing tags mini-ECC check. pt1.deleted is
--	 * inverted.
--	 */
--	deleted = !pt1.deleted;
--	pt1.deleted = 1;
--#else
--	(void) deleted; /* not used */
--#endif
--
--	/* Check the packed tags mini-ECC and correct if necessary/possible.
--	 */
--	retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1);
--	switch (retval) {
--	case 0:
--		/* no tags error, use MTD result */
--		break;
--	case 1:
--		/* recovered tags-ECC error */
--		dev->tagsEccFixed++;
--		eccres = YAFFS_ECC_RESULT_FIXED;
--		break;
--	default:
--		/* unrecovered tags-ECC error */
--		dev->tagsEccUnfixed++;
--		return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL);
--	}
--
--	/* Unpack the tags to extended form and set ECC result.
--	 * [set shouldBeFF just to keep yaffs_UnpackTags1 happy]
--	 */
--	pt1.shouldBeFF = 0xFFFFFFFF;
--	yaffs_UnpackTags1(etags, &pt1);
--	etags->eccResult = eccres;
--
--	/* Set deleted state.
--	 */
--#ifndef CONFIG_YAFFS_9BYTE_TAGS
--	etags->chunkDeleted = deleted;
--#else
--	etags->chunkDeleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7);
--#endif
--	return YAFFS_OK;
--}
--
--/* Mark a block bad.
-- *
-- * This is a persistant state.
-- * Use of this function should be rare.
-- *
-- * Returns YAFFS_OK or YAFFS_FAIL.
-- */
--int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
--{
--	struct mtd_info * mtd = dev->genericDevice;
--	int blocksize = dev->nChunksPerBlock * dev->nDataBytesPerChunk;
--	int retval;
--
--	yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, "marking block %d bad", blockNo);
--
--	retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo);
--	return (retval) ? YAFFS_FAIL : YAFFS_OK;
--}
--
--/* Check any MTD prerequists.
-- *
-- * Returns YAFFS_OK or YAFFS_FAIL.
-- */
--static int nandmtd1_TestPrerequists(struct mtd_info * mtd)
--{
--	/* 2.6.18 has mtd->ecclayout->oobavail */
--	/* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */
--	int oobavail = mtd->ecclayout->oobavail;
--
--	if (oobavail < YTAG1_SIZE) {
--		yaffs_trace(YAFFS_TRACE_ERROR,
--			"mtd device has only %d bytes for tags, need %d",
--			oobavail, YTAG1_SIZE);
--		return YAFFS_FAIL;
--	}
--	return YAFFS_OK;
--}
--
--/* 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 @@