[deliverable/linux.git] / fs / 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 1.58 2005/07/12 02:34:35 tpoynor Exp $
 *
 */

#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_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f)))
#define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f)))

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


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

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

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

#define jffs2_is_writebuffered(c) (c->wbuf != NULL)
#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__ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* JFFS2 -- Journalling Flash File System, Version 2.
	3	*
	4	* Copyright (C) 2002-2003 Red Hat, Inc.
	5	*
	6	* Created by David Woodhouse <dwmw2@infradead.org>
	7	*
	8	* For licensing information, see the file 'LICENCE' in this directory.
	9	*
751382dd	10	* $Id: os-linux.h,v 1.58 2005/07/12 02:34:35 tpoynor Exp $
1da177e4 LT	11	*
	12	*/
	13
	14	#ifndef __JFFS2_OS_LINUX_H__
	15	#define __JFFS2_OS_LINUX_H__
1da177e4 LT	16
	17	/* JFFS2 uses Linux mode bits natively -- no need for conversion */
	18	#define os_to_jffs2_mode(x) (x)
	19	#define jffs2_to_os_mode(x) (x)
	20
1da177e4 LT	21	struct kstatfs;
	22	struct kvec;
	23
1da177e4 LT	24	#define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode))
	25	#define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode)
	26	#define JFFS2_SB_INFO(sb) (sb->s_fs_info)
	27	#define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv)
1da177e4 LT	28
	29
	30	#define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
	31	#define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
	32	#define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
	33	#define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)
	34
1da177e4 LT	35	#define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f)))
1da177e4 LT	36	#define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f)))
1da177e4	37
1da177e4 LT	38	#define ITIME(sec) ((struct timespec){sec, 0})
	39	#define I_SEC(tv) ((tv).tv_sec)
	40	#define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec)
	41	#define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec)
	42	#define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec)
1da177e4 LT	43
	44	#define sleep_on_spinunlock(wq, s) \
	45	do { \
	46	DECLARE_WAITQUEUE(__wait, current); \
	47	add_wait_queue((wq), &__wait); \
	48	set_current_state(TASK_UNINTERRUPTIBLE); \
	49	spin_unlock(s); \
	50	schedule(); \
	51	remove_wait_queue((wq), &__wait); \
	52	} while(0)
	53
	54	static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
	55	{
1da177e4 LT	56	f->highest_version = 0;
	57	f->fragtree = RB_ROOT;
	58	f->metadata = NULL;
	59	f->dents = NULL;
	60	f->flags = 0;
	61	f->usercompr = 0;
1da177e4 LT	62	}
1da177e4 LT	63
3be36675	64
1da177e4 LT	65	#define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
1da177e4 LT	66
2f82ce1e AV	67	#ifndef CONFIG_JFFS2_FS_WRITEBUFFER
2f82ce1e AV	68	#define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) )
1da177e4	69	#define jffs2_can_mark_obsolete(c) (1)
8cd79216	70	#define jffs2_is_writebuffered(c) (0)
1da177e4 LT	71	#define jffs2_cleanmarker_oob(c) (0)
	72	#define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
	73
	74	#define jffs2_flash_write(c, ofs, len, retlen, buf) ((c)->mtd->write((c)->mtd, ofs, len, retlen, buf))
	75	#define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf))
	76	#define jffs2_flush_wbuf_pad(c) ({ (void)(c), 0; })
	77	#define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; })
	78	#define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
	79	#define jffs2_nand_flash_setup(c) (0)
	80	#define jffs2_nand_flash_cleanup(c) do {} while(0)
	81	#define jffs2_wbuf_dirty(c) (0)
	82	#define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
	83	#define jffs2_wbuf_timeout NULL
	84	#define jffs2_wbuf_process NULL
	85	#define jffs2_nor_ecc(c) (0)
8f15fd55	86	#define jffs2_dataflash(c) (0)
1da177e4 LT	87	#define jffs2_nor_ecc_flash_setup(c) (0)
1da177e4 LT	88	#define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
751382dd TP	89	#define jffs2_dataflash_setup(c) (0)
751382dd TP	90	#define jffs2_dataflash_cleanup(c) do {} while (0)
1da177e4 LT	91
	92	#else /* NAND and/or ECC'd NOR support present */
	93
8cd79216	94	#define jffs2_is_writebuffered(c) (c->wbuf != NULL)
2f82ce1e	95	#define SECTOR_ADDR(x) ( ((unsigned long)(x) / (unsigned long)(c->sector_size)) * c->sector_size )
1da177e4 LT	96	#define jffs2_can_mark_obsolete(c) ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & MTD_ECC)) \|\| c->mtd->type == MTD_RAM)
	97	#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
	98
	99	#define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
	100	#define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
	101	#define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
	102
	103	/* wbuf.c */
	104	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);
	105	int jffs2_flash_write(struct jffs2_sb_info c, loff_t ofs, size_t len, size_t retlen, const u_char *buf);
	106	int jffs2_flash_read(struct jffs2_sb_info c, loff_t ofs, size_t len, size_t retlen, u_char *buf);
	107	int jffs2_check_oob_empty(struct jffs2_sb_info c, struct jffs2_eraseblock jeb,int mode);
	108	int jffs2_check_nand_cleanmarker(struct jffs2_sb_info c, struct jffs2_eraseblock jeb);
	109	int jffs2_write_nand_cleanmarker(struct jffs2_sb_info c, struct jffs2_eraseblock jeb);
	110	int jffs2_write_nand_badblock(struct jffs2_sb_info c, struct jffs2_eraseblock jeb, uint32_t bad_offset);
	111	void jffs2_wbuf_timeout(unsigned long data);
	112	void jffs2_wbuf_process(void *data);
	113	int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
	114	int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
	115	int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
	116	void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
2f82ce1e	117
1da177e4 LT	118	#define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC))
	119	int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c);
	120	void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c);
2f82ce1e	121
8f15fd55 AV	122	#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
	123	int jffs2_dataflash_setup(struct jffs2_sb_info *c);
	124	void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
2f82ce1e AV	125
2f82ce1e AV	126	#endif /* WRITEBUFFER */
1da177e4 LT	127
	128	/* erase.c */
	129	static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
	130	{
	131	OFNI_BS_2SFFJ(c)->s_dirt = 1;
	132	}
	133
	134	/* background.c */
	135	int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
	136	void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
	137	void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
	138
	139	/* dir.c */
	140	extern struct file_operations jffs2_dir_operations;
	141	extern struct inode_operations jffs2_dir_inode_operations;
	142
	143	/* file.c */
	144	extern struct file_operations jffs2_file_operations;
	145	extern struct inode_operations jffs2_file_inode_operations;
	146	extern struct address_space_operations jffs2_file_address_operations;
	147	int jffs2_fsync(struct file , struct dentry , int);
	148	int jffs2_do_readpage_unlock (struct inode inode, struct page pg);
	149
	150	/* ioctl.c */
	151	int jffs2_ioctl(struct inode , struct file , unsigned int, unsigned long);
	152
	153	/* symlink.c */
	154	extern struct inode_operations jffs2_symlink_inode_operations;
	155
	156	/* fs.c */
	157	int jffs2_setattr (struct dentry , struct iattr );
	158	void jffs2_read_inode (struct inode *);
	159	void jffs2_clear_inode (struct inode *);
	160	void jffs2_dirty_inode(struct inode *inode);
	161	struct inode jffs2_new_inode (struct inode dir_i, int mode,
	162	struct jffs2_raw_inode *ri);
	163	int jffs2_statfs (struct super_block , struct kstatfs );
	164	void jffs2_write_super (struct super_block *);
	165	int jffs2_remount_fs (struct super_block , int , char *);
	166	int jffs2_do_fill_super(struct super_block sb, void data, int silent);
	167	void jffs2_gc_release_inode(struct jffs2_sb_info *c,
	168	struct jffs2_inode_info *f);
	169	struct jffs2_inode_info jffs2_gc_fetch_inode(struct jffs2_sb_info c,
	170	int inum, int nlink);
	171
	172	unsigned char jffs2_gc_fetch_page(struct jffs2_sb_info c,
	173	struct jffs2_inode_info *f,
	174	unsigned long offset,
	175	unsigned long *priv);
	176	void jffs2_gc_release_page(struct jffs2_sb_info *c,
	177	unsigned char *pg,
	178	unsigned long *priv);
	179	void jffs2_flash_cleanup(struct jffs2_sb_info *c);
	180
	181
	182	/* writev.c */
	183	int jffs2_flash_direct_writev(struct jffs2_sb_info c, const struct kvec vecs,
	184	unsigned long count, loff_t to, size_t *retlen);
	185
	186
	187	#endif /* __JFFS2_OS_LINUX_H__ */
	188
	189