fs/jffs2/os-linux.h - kernel/msm-4.9 - Gitiles

 /*
  * JFFS2 -- Journalling Flash File System, Version 2.
  *
  * Copyright (C) 2002-2003 Red Hat, Inc.
  *
  * Created by David Woodhouse <dwmw2@infradead.org>
  *
  * For licensing information, see the file 'LICENCE' in this directory.
  *
  * $Id: os-linux.h,v 1.54 2005/02/09 09:23:53 pavlov Exp $
  *
  */

 #ifndef __JFFS2_OS_LINUX_H__
 #define __JFFS2_OS_LINUX_H__
 #include <linux/version.h>

 /* JFFS2 uses Linux mode bits natively -- no need for conversion */
 #define os_to_jffs2_mode(x) (x)
 #define jffs2_to_os_mode(x) (x)

 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,73)
 #define kstatfs statfs
 #endif

 struct kstatfs;
 struct kvec;

 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
 #define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode))
 #define OFNI_EDONI_2SFFJ(f)  (&(f)->vfs_inode)
 #define JFFS2_SB_INFO(sb) (sb->s_fs_info)
 #define OFNI_BS_2SFFJ(c)  ((struct super_block *)c->os_priv)
 #elif defined(JFFS2_OUT_OF_KERNEL)
 #define JFFS2_INODE_INFO(i) ((struct jffs2_inode_info *) &(i)->u)
 #define OFNI_EDONI_2SFFJ(f)  ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) )
 #define JFFS2_SB_INFO(sb) ((struct jffs2_sb_info *) &(sb)->u)
 #define OFNI_BS_2SFFJ(c)  ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) )
 #else
 #define JFFS2_INODE_INFO(i) (&i->u.jffs2_i)
 #define OFNI_EDONI_2SFFJ(f)  ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) )
 #define JFFS2_SB_INFO(sb) (&sb->u.jffs2_sb)
 #define OFNI_BS_2SFFJ(c)  ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) )
 #endif


 #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
 #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
 #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
 #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)

 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,1)
 #define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f)))
 #define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f)))
 #else
 #define JFFS2_F_I_RDEV_MIN(f) (MINOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev)))
 #define JFFS2_F_I_RDEV_MAJ(f) (MAJOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev)))
 #endif

 /* Urgh. The things we do to keep the 2.4 build working */
 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,47)
 #define ITIME(sec) ((struct timespec){sec, 0})
 #define I_SEC(tv) ((tv).tv_sec)
 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec)
 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec)
 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec)
 #else
 #define ITIME(x) (x)
 #define I_SEC(x) (x)
 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime)
 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime)
 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime)
 #endif

 #define sleep_on_spinunlock(wq, s)				\
 	do {							\
 		DECLARE_WAITQUEUE(__wait, current);		\
 		add_wait_queue((wq), &__wait);			\
 		set_current_state(TASK_UNINTERRUPTIBLE);	\
 		spin_unlock(s);					\
 		schedule();					\
 		remove_wait_queue((wq), &__wait);		\
 	} while(0)

 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
 {
 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
 	f->highest_version = 0;
 	f->fragtree = RB_ROOT;
 	f->metadata = NULL;
 	f->dents = NULL;
 	f->flags = 0;
 	f->usercompr = 0;
 #else
 	memset(f, 0, sizeof(*f));
 	init_MUTEX_LOCKED(&f->sem);
 #endif
 }


 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
 #define jffs2_is_writebuffered(c) (c->wbuf != NULL)

 #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)

 #define jffs2_flash_write(c, ofs, len, retlen, buf) ((c)->mtd->write((c)->mtd, ofs, len, retlen, buf))
 #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf))
 #define jffs2_flush_wbuf_pad(c) ({ (void)(c), 0; })
 #define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; })
 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
 #define jffs2_nand_flash_setup(c) (0)
 #define jffs2_nand_flash_cleanup(c) do {} while(0)
 #define jffs2_wbuf_dirty(c) (0)
 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
 #define jffs2_wbuf_timeout NULL
 #define jffs2_wbuf_process NULL
 #define jffs2_nor_ecc(c) (0)
 #define jffs2_dataflash(c) (0)
 #define jffs2_nor_ecc_flash_setup(c) (0)
 #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)

 #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)

 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)

 /* wbuf.c */
 int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino);
 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
 void jffs2_wbuf_timeout(unsigned long data);
 void jffs2_wbuf_process(void *data);
 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);

 #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);

 #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);

 #endif /* WRITEBUFFER */

 /* erase.c */
 static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
 {
 	OFNI_BS_2SFFJ(c)->s_dirt = 1;
 }

 /* background.c */
 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);

 /* dir.c */
 extern struct file_operations jffs2_dir_operations;
 extern struct inode_operations jffs2_dir_inode_operations;

 /* file.c */
 extern struct file_operations jffs2_file_operations;
 extern struct inode_operations jffs2_file_inode_operations;
 extern struct address_space_operations jffs2_file_address_operations;
 int jffs2_fsync(struct file *, struct dentry *, int);
 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);

 /* ioctl.c */
 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);

 /* symlink.c */
 extern struct inode_operations jffs2_symlink_inode_operations;

 /* fs.c */
 int jffs2_setattr (struct dentry *, struct iattr *);
 void jffs2_read_inode (struct inode *);
 void jffs2_clear_inode (struct inode *);
 void jffs2_dirty_inode(struct inode *inode);
 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
 			       struct jffs2_raw_inode *ri);
 int jffs2_statfs (struct super_block *, struct kstatfs *);
 void jffs2_write_super (struct super_block *);
 int jffs2_remount_fs (struct super_block *, int *, char *);
 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
 void jffs2_gc_release_inode(struct jffs2_sb_info *c,
 			    struct jffs2_inode_info *f);
 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
 					      int inum, int nlink);

 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
 				   struct jffs2_inode_info *f,
 				   unsigned long offset,
 				   unsigned long *priv);
 void jffs2_gc_release_page(struct jffs2_sb_info *c,
 			   unsigned char *pg,
 			   unsigned long *priv);
 void jffs2_flash_cleanup(struct jffs2_sb_info *c);


 /* writev.c */
 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
 		       unsigned long count, loff_t to, size_t *retlen);


 #endif /* __JFFS2_OS_LINUX_H__ */
	/*
	* JFFS2 -- Journalling Flash File System, Version 2.
	*
	* Copyright (C) 2002-2003 Red Hat, Inc.
	*
	* Created by David Woodhouse <dwmw2@infradead.org>
	*
	* For licensing information, see the file 'LICENCE' in this directory.
	*
	* $Id: os-linux.h,v 1.54 2005/02/09 09:23:53 pavlov Exp $
	*
	*/

	#ifndef __JFFS2_OS_LINUX_H__
	#define __JFFS2_OS_LINUX_H__
	#include <linux/version.h>

	/* JFFS2 uses Linux mode bits natively -- no need for conversion */
	#define os_to_jffs2_mode(x) (x)
	#define jffs2_to_os_mode(x) (x)

	#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,73)
	#define kstatfs statfs
	#endif

	struct kstatfs;
	struct kvec;

	#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
	#define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode))
	#define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode)
	#define JFFS2_SB_INFO(sb) (sb->s_fs_info)
	#define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv)
	#elif defined(JFFS2_OUT_OF_KERNEL)
	#define JFFS2_INODE_INFO(i) ((struct jffs2_inode_info *) &(i)->u)
	#define OFNI_EDONI_2SFFJ(f) ((struct inode ) ( ((char )f) - ((char )(&((struct inode )NULL)->u)) ) )
	#define JFFS2_SB_INFO(sb) ((struct jffs2_sb_info *) &(sb)->u)
	#define OFNI_BS_2SFFJ(c) ((struct super_block ) ( ((char )c) - ((char )(&((struct super_block )NULL)->u)) ) )
	#else
	#define JFFS2_INODE_INFO(i) (&i->u.jffs2_i)
	#define OFNI_EDONI_2SFFJ(f) ((struct inode ) ( ((char )f) - ((char )(&((struct inode )NULL)->u)) ) )
	#define JFFS2_SB_INFO(sb) (&sb->u.jffs2_sb)
	#define OFNI_BS_2SFFJ(c) ((struct super_block ) ( ((char )c) - ((char )(&((struct super_block )NULL)->u)) ) )
	#endif


	#define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
	#define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
	#define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
	#define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)

	#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,1)
	#define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f)))
	#define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f)))
	#else
	#define JFFS2_F_I_RDEV_MIN(f) (MINOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev)))
	#define JFFS2_F_I_RDEV_MAJ(f) (MAJOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev)))
	#endif

	/* Urgh. The things we do to keep the 2.4 build working */
	#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,47)
	#define ITIME(sec) ((struct timespec){sec, 0})
	#define I_SEC(tv) ((tv).tv_sec)
	#define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec)
	#define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec)
	#define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec)
	#else
	#define ITIME(x) (x)
	#define I_SEC(x) (x)
	#define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime)
	#define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime)
	#define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime)
	#endif

	#define sleep_on_spinunlock(wq, s) \
	do { \
	DECLARE_WAITQUEUE(__wait, current); \
	add_wait_queue((wq), &__wait); \
	set_current_state(TASK_UNINTERRUPTIBLE); \
	spin_unlock(s); \
	schedule(); \
	remove_wait_queue((wq), &__wait); \
	} while(0)

	static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
	{
	#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
	f->highest_version = 0;
	f->fragtree = RB_ROOT;
	f->metadata = NULL;
	f->dents = NULL;
	f->flags = 0;
	f->usercompr = 0;
	#else
	memset(f, 0, sizeof(*f));
	init_MUTEX_LOCKED(&f->sem);
	#endif
	}


	#define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
	#define jffs2_is_writebuffered(c) (c->wbuf != NULL)

	#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)

	#define jffs2_flash_write(c, ofs, len, retlen, buf) ((c)->mtd->write((c)->mtd, ofs, len, retlen, buf))
	#define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf))
	#define jffs2_flush_wbuf_pad(c) ({ (void)(c), 0; })
	#define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; })
	#define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
	#define jffs2_nand_flash_setup(c) (0)
	#define jffs2_nand_flash_cleanup(c) do {} while(0)
	#define jffs2_wbuf_dirty(c) (0)
	#define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
	#define jffs2_wbuf_timeout NULL
	#define jffs2_wbuf_process NULL
	#define jffs2_nor_ecc(c) (0)
	#define jffs2_dataflash(c) (0)
	#define jffs2_nor_ecc_flash_setup(c) (0)
	#define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)

	#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)

	#define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
	#define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
	#define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)

	/* wbuf.c */
	int jffs2_flash_writev(struct jffs2_sb_info c, const struct kvec vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino);
	int jffs2_flash_write(struct jffs2_sb_info c, loff_t ofs, size_t len, size_t retlen, const u_char *buf);
	int jffs2_flash_read(struct jffs2_sb_info c, loff_t ofs, size_t len, size_t retlen, u_char *buf);
	int jffs2_check_oob_empty(struct jffs2_sb_info c, struct jffs2_eraseblock jeb,int mode);
	int jffs2_check_nand_cleanmarker(struct jffs2_sb_info c, struct jffs2_eraseblock jeb);
	int jffs2_write_nand_cleanmarker(struct jffs2_sb_info c, struct jffs2_eraseblock jeb);
	int jffs2_write_nand_badblock(struct jffs2_sb_info c, struct jffs2_eraseblock jeb, uint32_t bad_offset);
	void jffs2_wbuf_timeout(unsigned long data);
	void jffs2_wbuf_process(void *data);
	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);

	#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);

	#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);

	#endif /* WRITEBUFFER */

	/* erase.c */
	static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
	{
	OFNI_BS_2SFFJ(c)->s_dirt = 1;
	}

	/* background.c */
	int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
	void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
	void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);

	/* dir.c */
	extern struct file_operations jffs2_dir_operations;
	extern struct inode_operations jffs2_dir_inode_operations;

	/* file.c */
	extern struct file_operations jffs2_file_operations;
	extern struct inode_operations jffs2_file_inode_operations;
	extern struct address_space_operations jffs2_file_address_operations;
	int jffs2_fsync(struct file , struct dentry , int);
	int jffs2_do_readpage_unlock (struct inode inode, struct page pg);

	/* ioctl.c */
	int jffs2_ioctl(struct inode , struct file , unsigned int, unsigned long);

	/* symlink.c */
	extern struct inode_operations jffs2_symlink_inode_operations;

	/* fs.c */
	int jffs2_setattr (struct dentry , struct iattr );
	void jffs2_read_inode (struct inode *);
	void jffs2_clear_inode (struct inode *);
	void jffs2_dirty_inode(struct inode *inode);
	struct inode jffs2_new_inode (struct inode dir_i, int mode,
	struct jffs2_raw_inode *ri);
	int jffs2_statfs (struct super_block , struct kstatfs );
	void jffs2_write_super (struct super_block *);
	int jffs2_remount_fs (struct super_block , int , char *);
	int jffs2_do_fill_super(struct super_block sb, void data, int silent);
	void jffs2_gc_release_inode(struct jffs2_sb_info *c,
	struct jffs2_inode_info *f);
	struct jffs2_inode_info jffs2_gc_fetch_inode(struct jffs2_sb_info c,
	int inum, int nlink);

	unsigned char jffs2_gc_fetch_page(struct jffs2_sb_info c,
	struct jffs2_inode_info *f,
	unsigned long offset,
	unsigned long *priv);
	void jffs2_gc_release_page(struct jffs2_sb_info *c,
	unsigned char *pg,
	unsigned long *priv);
	void jffs2_flash_cleanup(struct jffs2_sb_info *c);


	/* writev.c */
	int jffs2_flash_direct_writev(struct jffs2_sb_info c, const struct kvec vecs,
	unsigned long count, loff_t to, size_t *retlen);


	#endif /* __JFFS2_OS_LINUX_H__ */