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[JFFS2] Use a single config option for write buffer support

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This patch replaces the current CONFIG_JFFS2_FS_NAND, CONFIG_JFFS2_FS_NOR_ECC
and CONFIG_JFFS2_FS_DATAFLASH with a single configuration option -
CONFIG_JFFS2_FS_WRITEBUFFER.

The only functional change of this patch is that the slower div/mod
calculations for SECTOR_ADDR(), PAGE_DIV() and PAGE_MOD() are now always
used when CONFIG_JFFS2_FS_WRITEBUFFER is enabled.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Andrew Victor 2005-02-09 09:24:26 +00:00 committed by Thomas Gleixner
parent 8f15fd55f9
commit 2f82ce1eb6
9 changed files with 35 additions and 70 deletions
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33
fs/Kconfig
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@ -1063,33 +1063,18 @@ config JFFS2_FS_DEBUG
If reporting bugs, please try to have available a full dump of the
messages at debug level 1 while the misbehaviour was occurring.
config JFFS2_FS_NAND
bool "JFFS2 support for NAND flash"
config JFFS2_FS_WRITEBUFFER
bool "JFFS2 write-buffering support"
depends on JFFS2_FS
default n
default y
help
This enables the support for NAND flash in JFFS2. NAND is a newer
type of flash chip design than the traditional NOR flash, with
higher density but a handful of characteristics which make it more
interesting for the file system to use.
This enables the write-buffering support in JFFS2.
Say 'N' unless you have NAND flash.
config JFFS2_FS_NOR_ECC
bool "JFFS2 support for ECC'd NOR flash (EXPERIMENTAL)"
depends on JFFS2_FS && EXPERIMENTAL
default n
help
This enables the experimental support for NOR flash with transparent
ECC for JFFS2. This type of flash chip is not common, however it is
available from ST Microelectronics.
config JFFS2_FS_DATAFLASH
bool "JFFS2 support for DataFlash (EXPERIMENTAL)"
depends on JFFS2_FS && EXPERIMENTAL
default n
help
This enables the experimental support for JFFS2 on DataFlash devices.
This functionality is required to support JFFS2 on the following
types of flash devices:
- NAND flash
- NOR flash with transparent ECC
- DataFlash
config JFFS2_COMPRESSION_OPTIONS
bool "Advanced compression options for JFFS2"

6
fs/jffs2/Makefile
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@ -1,7 +1,7 @@
#
# Makefile for the Linux Journalling Flash File System v2 (JFFS2)
#
# $Id: Makefile.common,v 1.8 2005/02/09 09:17:40 pavlov Exp $
# $Id: Makefile.common,v 1.9 2005/02/09 09:23:53 pavlov Exp $
#
obj-$(CONFIG_JFFS2_FS) += jffs2.o
@ -11,9 +11,7 @@ jffs2-y += read.o nodemgmt.o readinode.o write.o scan.o gc.o
jffs2-y += symlink.o build.o erase.o background.o fs.o writev.o
jffs2-y += super.o
jffs2-$(CONFIG_JFFS2_FS_NAND) += wbuf.o
jffs2-$(CONFIG_JFFS2_FS_NOR_ECC) += wbuf.o
jffs2-$(CONFIG_JFFS2_FS_DATAFLASH) += wbuf.o
jffs2-$(CONFIG_JFFS2_FS_WRITEBUFFER) += wbuf.o
jffs2-$(CONFIG_JFFS2_RUBIN) += compr_rubin.o
jffs2-$(CONFIG_JFFS2_RTIME) += compr_rtime.o
jffs2-$(CONFIG_JFFS2_ZLIB) += compr_zlib.o

6
fs/jffs2/fs.c
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@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: fs.c,v 1.52 2005/02/09 09:17:40 pavlov Exp $
* $Id: fs.c,v 1.53 2005/02/09 09:23:53 pavlov Exp $
*
*/
@ -450,13 +450,11 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent)
c = JFFS2_SB_INFO(sb);
#ifndef CONFIG_JFFS2_FS_NAND
#ifndef CONFIG_JFFS2_FS_WRITEBUFFER
if (c->mtd->type == MTD_NANDFLASH) {
printk(KERN_ERR "jffs2: Cannot operate on NAND flash unless jffs2 NAND support is compiled in.\n");
return -EINVAL;
}
#endif
#ifndef CONFIG_JFFS2_FS_DATAFLASH
if (c->mtd->type == MTD_DATAFLASH) {
printk(KERN_ERR "jffs2: Cannot operate on DataFlash unless jffs2 DataFlash support is compiled in.\n");
return -EINVAL;

4
fs/jffs2/nodelist.h
View File

@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: nodelist.h,v 1.126 2004/11/19 15:06:29 dedekind Exp $
* $Id: nodelist.h,v 1.127 2005/02/09 09:23:53 pavlov Exp $
*
*/
@ -462,7 +462,7 @@ int jffs2_do_mount_fs(struct jffs2_sb_info *c);
/* erase.c */
void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count);
#ifdef CONFIG_JFFS2_FS_NAND
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
/* wbuf.c */
int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);

28
fs/jffs2/os-linux.h
View File

@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: os-linux.h,v 1.53 2005/02/09 09:17:41 pavlov Exp $
* $Id: os-linux.h,v 1.54 2005/02/09 09:23:53 pavlov Exp $
*
*/
@ -97,16 +97,12 @@ static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
#endif
}
#ifdef CONFIG_JFFS2_FS_DATAFLASH
#define SECTOR_ADDR(x) ( ((unsigned long)(x) / (unsigned long)(c->sector_size)) * c->sector_size )
#else
#define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) )
#endif
#define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
#define jffs2_is_writebuffered(c) (c->wbuf != NULL)
#if (!defined CONFIG_JFFS2_FS_NAND && !defined CONFIG_JFFS2_FS_NOR_ECC && !defined CONFIG_JFFS2_FS_DATAFLASH)
#ifndef CONFIG_JFFS2_FS_WRITEBUFFER
#define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) )
#define jffs2_can_mark_obsolete(c) (1)
#define jffs2_cleanmarker_oob(c) (0)
#define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
@ -129,6 +125,7 @@ static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
#else /* NAND and/or ECC'd NOR support present */
#define SECTOR_ADDR(x) ( ((unsigned long)(x) / (unsigned long)(c->sector_size)) * c->sector_size )
#define jffs2_can_mark_obsolete(c) ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & MTD_ECC)) || c->mtd->type == MTD_RAM)
#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
@ -150,25 +147,16 @@ int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
#ifdef CONFIG_JFFS2_FS_NOR_ECC
#define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC))
int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c);
void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c);
#else
#define jffs2_nor_ecc(c) (0)
#define jffs2_nor_ecc_flash_setup(c) (0)
#define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
#endif /* NOR ECC */
#ifdef CONFIG_JFFS2_FS_DATAFLASH
#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
int jffs2_dataflash_setup(struct jffs2_sb_info *c);
void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
#else
#define jffs2_dataflash(c) (0)
#define jffs2_dataflash_setup(c) (0)
#define jffs2_dataflash_cleanup(c) do {} while (0)
#endif /* DATAFLASH */
#endif /* NAND */
#endif /* WRITEBUFFER */
/* erase.c */
static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)

12
fs/jffs2/scan.c
View File

@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: scan.c,v 1.117 2005/02/09 09:17:41 pavlov Exp $
* $Id: scan.c,v 1.118 2005/02/09 09:23:53 pavlov Exp $
*
*/
#include <linux/kernel.h>
@ -68,7 +68,7 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
static inline int min_free(struct jffs2_sb_info *c)
{
uint32_t min = 2 * sizeof(struct jffs2_raw_inode);
#if defined CONFIG_JFFS2_FS_NAND || defined CONFIG_JFFS2_FS_NOR_ECC || defined CONFIG_JFFS2_FS_DATAFLASH
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
if (!jffs2_can_mark_obsolete(c) && min < c->wbuf_pagesize)
return c->wbuf_pagesize;
#endif
@ -228,7 +228,7 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
c->dirty_size -= c->nextblock->dirty_size;
c->nextblock->dirty_size = 0;
}
#if defined CONFIG_JFFS2_FS_NAND || defined CONFIG_JFFS2_FS_NOR_ECC || defined CONFIG_JFFS2_FS_DATAFLASH
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
if (!jffs2_can_mark_obsolete(c) && c->nextblock && (c->nextblock->free_size & (c->wbuf_pagesize-1))) {
/* If we're going to start writing into a block which already
contains data, and the end of the data isn't page-aligned,
@ -294,7 +294,7 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
uint32_t hdr_crc, buf_ofs, buf_len;
int err;
int noise = 0;
#ifdef CONFIG_JFFS2_FS_NAND
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
int cleanmarkerfound = 0;
#endif
@ -303,7 +303,7 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
D1(printk(KERN_DEBUG "jffs2_scan_eraseblock(): Scanning block at 0x%x\n", ofs));
#ifdef CONFIG_JFFS2_FS_NAND
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
if (jffs2_cleanmarker_oob(c)) {
int ret = jffs2_check_nand_cleanmarker(c, jeb);
D2(printk(KERN_NOTICE "jffs_check_nand_cleanmarker returned %d\n",ret));
@ -338,7 +338,7 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
ofs += 4;
if (ofs == EMPTY_SCAN_SIZE(c->sector_size)) {
#ifdef CONFIG_JFFS2_FS_NAND
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
if (jffs2_cleanmarker_oob(c)) {
/* scan oob, take care of cleanmarker */
int ret = jffs2_check_oob_empty(c, jeb, cleanmarkerfound);

4
fs/jffs2/super.c
View File

@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: super.c,v 1.104 2004/11/23 15:37:31 gleixner Exp $
* $Id: super.c,v 1.105 2005/02/09 09:23:54 pavlov Exp $
*
*/
@ -309,7 +309,7 @@ static int __init init_jffs2_fs(void)
int ret;
printk(KERN_INFO "JFFS2 version 2.2."
#ifdef CONFIG_JFFS2_FS_NAND
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
" (NAND)"
#endif
" (C) 2001-2003 Red Hat, Inc.\n");

8
fs/jffs2/wbuf.c
View File

@ -9,7 +9,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: wbuf.c,v 1.88 2005/02/09 09:17:41 pavlov Exp $
* $Id: wbuf.c,v 1.89 2005/02/09 09:23:54 pavlov Exp $
*
*/
@ -604,7 +604,7 @@ int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c)
return ret;
}
#ifdef CONFIG_JFFS2_FS_DATAFLASH
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
#define PAGE_DIV(x) ( ((unsigned long)(x) / (unsigned long)(c->wbuf_pagesize)) * (unsigned long)(c->wbuf_pagesize) )
#define PAGE_MOD(x) ( (unsigned long)(x) % (unsigned long)(c->wbuf_pagesize) )
#else
@ -1198,7 +1198,6 @@ void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c)
kfree(c->wbuf);
}
#ifdef CONFIG_JFFS2_FS_DATAFLASH
int jffs2_dataflash_setup(struct jffs2_sb_info *c) {
c->cleanmarker_size = 0; /* No cleanmarkers needed */
@ -1219,9 +1218,7 @@ int jffs2_dataflash_setup(struct jffs2_sb_info *c) {
void jffs2_dataflash_cleanup(struct jffs2_sb_info *c) {
kfree(c->wbuf);
}
#endif
#ifdef CONFIG_JFFS2_FS_NOR_ECC
int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c) {
/* Cleanmarker is actually larger on the flashes */
c->cleanmarker_size = 16;
@ -1241,4 +1238,3 @@ int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c) {
void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c) {
kfree(c->wbuf);
}
#endif

4
include/linux/jffs2_fs_sb.h
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@ -1,4 +1,4 @@
/* $Id: jffs2_fs_sb.h,v 1.49 2005/02/09 09:17:41 pavlov Exp $ */
/* $Id: jffs2_fs_sb.h,v 1.50 2005/02/09 09:23:55 pavlov Exp $ */
#ifndef _JFFS2_FS_SB
#define _JFFS2_FS_SB
@ -94,7 +94,7 @@ struct jffs2_sb_info {
to an obsoleted node. I don't like this. Alternatives welcomed. */
struct semaphore erase_free_sem;
#if defined CONFIG_JFFS2_FS_NAND || defined CONFIG_JFFS2_FS_NOR_ECC || defined CONFIG_JFFS2_FS_DATAFLASH
#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
/* Write-behind buffer for NAND flash */
unsigned char *wbuf;
uint32_t wbuf_ofs;