/*
   * JFFS2 -- Journalling Flash File System, Version 2.
   *

   * Copyright © 2001-2007 Red Hat, Inc.

   *
   * Created by David Woodhouse <dwmw2@infradead.org>
   *
   * For licensing information, see the file 'LICENCE' in this directory.
   *

   */
  
  #ifndef __JFFS2_OS_LINUX_H__
  #define __JFFS2_OS_LINUX_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)

  struct kstatfs;
  struct kvec;

  #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)

  
  
  #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)

  #define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev)

  #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)

  
  #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)
  {

  	f->highest_version = 0;
  	f->fragtree = RB_ROOT;
  	f->metadata = NULL;
  	f->dents = NULL;

  	f->target = NULL;

  	f->flags = 0;
  	f->usercompr = 0;

  }

  #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)

  #define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) )

  #ifndef CONFIG_JFFS2_FS_WRITEBUFFER

  
  #ifdef CONFIG_JFFS2_SUMMARY
  #define jffs2_can_mark_obsolete(c) (0)
  #else

  #define jffs2_can_mark_obsolete(c) (1)

  #endif

  #define jffs2_is_writebuffered(c) (0)

  #define jffs2_cleanmarker_oob(c) (0)
  #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)

  #define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, 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) ({ do{} while(0); (void)(c), 0; })
  #define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (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_dataflash(c) (0)

  #define jffs2_dataflash_setup(c) (0)
  #define jffs2_dataflash_cleanup(c) do {} while (0)

  #define jffs2_nor_wbuf_flash(c) (0)

  #define jffs2_nor_wbuf_flash_setup(c) (0)
  #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0)

  #define jffs2_ubivol(c) (0)
  #define jffs2_ubivol_setup(c) (0)
  #define jffs2_ubivol_cleanup(c) do {} while (0)

  
  #else /* NAND and/or ECC'd NOR support present */

  #define jffs2_is_writebuffered(c) (c->wbuf != NULL)

  
  #ifdef CONFIG_JFFS2_SUMMARY
  #define jffs2_can_mark_obsolete(c) (0)
  #else

  #define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE))

  #endif

  #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_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);

  #define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME)
  int jffs2_ubivol_setup(struct jffs2_sb_info *c);
  void jffs2_ubivol_cleanup(struct jffs2_sb_info *c);

  #define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE))

  int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
  void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);

  #endif /* WRITEBUFFER */

  static inline void jffs2_dirty_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 const struct file_operations jffs2_dir_operations;

  extern const struct inode_operations jffs2_dir_inode_operations;

  
  /* file.c */

  extern const struct file_operations jffs2_file_operations;

  extern const struct inode_operations jffs2_file_inode_operations;

  extern const struct address_space_operations jffs2_file_address_operations;

  int jffs2_fsync(struct file *, loff_t, loff_t, int);

  int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
  
  /* ioctl.c */

  long jffs2_ioctl(struct file *, unsigned int, unsigned long);

  
  /* symlink.c */

  extern const struct inode_operations jffs2_symlink_inode_operations;

  
  /* fs.c */
  int jffs2_setattr (struct dentry *, struct iattr *);

  int jffs2_do_setattr (struct inode *, struct iattr *);

  struct inode *jffs2_iget(struct super_block *, unsigned long);

  void jffs2_evict_inode (struct inode *);

  void jffs2_dirty_inode(struct inode *inode, int flags);

  struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode,

  			       struct jffs2_raw_inode *ri);

  int jffs2_statfs (struct dentry *, struct kstatfs *);

  int jffs2_do_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 unlinked);

  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);

  int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
  			size_t *retlen, const u_char *buf);

  
  #endif /* __JFFS2_OS_LINUX_H__ */