Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755984Ab0KCQyb (ORCPT ); Wed, 3 Nov 2010 12:54:31 -0400 Received: from mail-pw0-f46.google.com ([209.85.160.46]:52870 "EHLO mail-pw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755816Ab0KCQyY (ORCPT ); Wed, 3 Nov 2010 12:54:24 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=E/KcflcfQN9cm0dZOGXokhhEtx4Sz4iK8i8ZbEt4Y6SStl71PIlygsD5m3acaveS+w YZxrCkcLN72QI/jg+TuqvTu3+rP/UjIW3CfSM1iK5QK6L/urS3PKbWFGkfcU8DKVLJnW TRwVXAbJn2J09mzwa8+YlSd20BHK7skJhDKO8= From: cdhmanning@gmail.com To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: Charles Manning Subject: [PATCH 1/9] Add yaffs Kconfig and Makefile Date: Thu, 4 Nov 2010 05:53:16 +1300 Message-Id: <1288803204-3849-2-git-send-email-cdhmanning@gmail.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1288803204-3849-1-git-send-email-cdhmanning@gmail.com> References: <1288803204-3849-1-git-send-email-cdhmanning@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6911 Lines: 239 From: Charles Manning Adding yaffs2 file system. Signed-off-by: Charles Manning --- fs/yaffs2/Kconfig | 190 ++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/yaffs2/Makefile | 17 +++++ 2 files changed, 207 insertions(+), 0 deletions(-) create mode 100644 fs/yaffs2/Kconfig create mode 100644 fs/yaffs2/Makefile diff --git a/fs/yaffs2/Kconfig b/fs/yaffs2/Kconfig new file mode 100644 index 0000000..7b3988c --- /dev/null +++ b/fs/yaffs2/Kconfig @@ -0,0 +1,190 @@ +# +# YAFFS file system configurations +# + +config YAFFS_FS + tristate "YAFFS2 file system support" + default n + depends on MTD_BLOCK + select YAFFS_YAFFS1 + select YAFFS_YAFFS2 + help + YAFFS2, or Yet Another Flash Filing System, is a filing system + optimised for NAND Flash chips. + + To compile the YAFFS2 file system support as a module, choose M + here: the module will be called yaffs2. + + If unsure, say N. + + Further information on YAFFS2 is available at + . + +config YAFFS_YAFFS1 + bool "512 byte / page devices" + depends on YAFFS_FS + default y + help + Enable YAFFS1 support -- yaffs for 512 byte / page devices + + Not needed for 2K-page devices. + + If unsure, say Y. + +config YAFFS_9BYTE_TAGS + bool "Use older-style on-NAND data format with pageStatus byte" + depends on YAFFS_YAFFS1 + default n + help + + Older-style on-NAND data format has a "pageStatus" byte to record + chunk/page state. This byte is zero when the page is discarded. + Choose this option if you have existing on-NAND data using this + format that you need to continue to support. New data written + also uses the older-style format. Note: Use of this option + generally requires that MTD's oob layout be adjusted to use the + older-style format. See notes on tags formats and MTD versions + in yaffs_mtdif1.c. + + If unsure, say N. + +config YAFFS_DOES_ECC + bool "Lets Yaffs do its own ECC" + depends on YAFFS_FS && YAFFS_YAFFS1 && !YAFFS_9BYTE_TAGS + default n + help + This enables Yaffs to use its own ECC functions instead of using + the ones from the generic MTD-NAND driver. + + If unsure, say N. + +config YAFFS_ECC_WRONG_ORDER + bool "Use the same ecc byte order as Steven Hill's nand_ecc.c" + depends on YAFFS_FS && YAFFS_DOES_ECC && !YAFFS_9BYTE_TAGS + default n + help + This makes yaffs_ecc.c use the same ecc byte order as Steven + Hill's nand_ecc.c. If not set, then you get the same ecc byte + order as SmartMedia. + + If unsure, say N. + +config YAFFS_YAFFS2 + bool "2048 byte (or larger) / page devices" + depends on YAFFS_FS + default y + help + Enable YAFFS2 support -- yaffs for >= 2K bytes per page devices + + If unsure, say Y. + +config YAFFS_AUTO_YAFFS2 + bool "Autoselect yaffs2 format" + depends on YAFFS_YAFFS2 + default y + help + Without this, you need to explicitely use yaffs2 as the file + system type. With this, you can say "yaffs" and yaffs or yaffs2 + will be used depending on the device page size (yaffs on + 512-byte page devices, yaffs2 on 2K page devices). + + If unsure, say Y. + +config YAFFS_DISABLE_TAGS_ECC + bool "Disable YAFFS from doing ECC on tags by default" + depends on YAFFS_FS && YAFFS_YAFFS2 + default n + help + This defaults Yaffs to using its own ECC calculations on tags instead of + just relying on the MTD. + This behavior can also be overridden with tags_ecc_on and + tags_ecc_off mount options. + + If unsure, say N. + + +config YAFFS_DISABLE_WIDE_TNODES + bool "Turn off wide tnodes" + depends on YAFFS_FS + default n + help + Wide tnodes are only used for NAND arrays >=32MB for 512-byte + page devices and >=128MB for 2k page devices. They use slightly + more RAM but are faster since they eliminate chunk group + searching. + + Setting this to 'y' will force tnode width to 16 bits and save + memory but make large arrays slower. + + If unsure, say N. + +config YAFFS_ALWAYS_CHECK_CHUNK_ERASED + bool "Force chunk erase check" + depends on YAFFS_FS + default n + help + Normally YAFFS only checks chunks before writing until an erased + chunk is found. This helps to detect any partially written + chunks that might have happened due to power loss. + + Enabling this forces on the test that chunks are erased in flash + before writing to them. This takes more time but is potentially + a bit more secure. + + Suggest setting Y during development and ironing out driver + issues etc. Suggest setting to N if you want faster writing. + + If unsure, say Y. + +config YAFFS_SHORT_NAMES_IN_RAM + bool "Cache short names in RAM" + depends on YAFFS_FS + default y + help + If this config is set, then short names are stored with the + yaffs_Object. This costs an extra 16 bytes of RAM per object, + but makes look-ups faster. + + If unsure, say Y. + +config YAFFS_EMPTY_LOST_AND_FOUND + bool "Empty lost and found on boot" + depends on YAFFS_FS + default n + help + If this is enabled then the contents of lost and found is + automatically dumped at mount. + + If unsure, say N. + +config YAFFS_DISABLE_BLOCK_REFRESHING + bool "Disable yaffs2 block refreshing" + depends on YAFFS_FS + default n + help + If this is set, then block refreshing is disabled. + Block refreshing infrequently refreshes the oldest block in + a yaffs2 file system. This mechanism helps to refresh flash to + mitigate against data loss. This is particularly useful for MLC. + + If unsure, say N. + +config YAFFS_DISABLE_BACKGROUND + bool "Disable yaffs2 background processing" + depends on YAFFS_FS + default n + help + If this is set, then background processing is disabled. + Background processing makes many foreground activities faster. + + If unsure, say N. + +config YAFFS_XATTR + bool "Enable yaffs2 xattr support" + depends on YAFFS_FS + default y + help + If this is set then yaffs2 will provide xattr support. + If unsure, say Y. + + diff --git a/fs/yaffs2/Makefile b/fs/yaffs2/Makefile new file mode 100644 index 0000000..e63a28a --- /dev/null +++ b/fs/yaffs2/Makefile @@ -0,0 +1,17 @@ +# +# Makefile for the linux YAFFS filesystem routines. +# + +obj-$(CONFIG_YAFFS_FS) += yaffs.o + +yaffs-y := yaffs_ecc.o yaffs_vfs.o yaffs_guts.o yaffs_checkptrw.o +yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o +yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o +yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o +yaffs-y += yaffs_nameval.o yaffs_attribs.o +yaffs-y += yaffs_allocator.o +yaffs-y += yaffs_yaffs1.o +yaffs-y += yaffs_yaffs2.o +yaffs-y += yaffs_bitmap.o +yaffs-y += yaffs_verify.o + -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/