[mirror_ubuntu-artful-kernel.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 1.61 2005/09/07 08:34:54 havasi 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->target = 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)) )

#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) ({ (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_wbuf_flash(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)
#define jffs2_nor_wbuf_flash_setup(c) (0)
#define jffs2_nor_wbuf_flash_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 )

#ifdef CONFIG_JFFS2_SUMMARY
#define jffs2_can_mark_obsolete(c) (0)
#else
#define jffs2_can_mark_obsolete(c) \
  ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & (MTD_ECC|MTD_PROGRAM_REGIONS))) || \
   c->mtd->type == MTD_RAM)
#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_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);

#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_PROGRAM_REGIONS))
int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
void jffs2_nor_wbuf_flash_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);
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__ */
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	*
e631ddba	10	* $Id: os-linux.h,v 1.61 2005/09/07 08:34:54 havasi 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;
2b79adcc	60	f->target = NULL;
1da177e4 LT	61	f->flags = 0;
1da177e4 LT	62	f->usercompr = 0;
1da177e4 LT	63	}
1da177e4 LT	64
3be36675	65
1da177e4 LT	66	#define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
1da177e4 LT	67
2f82ce1e AV	68	#ifndef CONFIG_JFFS2_FS_WRITEBUFFER
2f82ce1e AV	69	#define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) )
e631ddba FH	70
	71	#ifdef CONFIG_JFFS2_SUMMARY
	72	#define jffs2_can_mark_obsolete(c) (0)
	73	#else
1da177e4	74	#define jffs2_can_mark_obsolete(c) (1)
e631ddba FH	75	#endif
e631ddba FH	76
8cd79216	77	#define jffs2_is_writebuffered(c) (0)
1da177e4 LT	78	#define jffs2_cleanmarker_oob(c) (0)
	79	#define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
	80
e631ddba	81	#define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf)
1da177e4 LT	82	#define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf))
	83	#define jffs2_flush_wbuf_pad(c) ({ (void)(c), 0; })
	84	#define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; })
	85	#define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
	86	#define jffs2_nand_flash_setup(c) (0)
	87	#define jffs2_nand_flash_cleanup(c) do {} while(0)
	88	#define jffs2_wbuf_dirty(c) (0)
	89	#define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
	90	#define jffs2_wbuf_timeout NULL
	91	#define jffs2_wbuf_process NULL
	92	#define jffs2_nor_ecc(c) (0)
8f15fd55	93	#define jffs2_dataflash(c) (0)
59da721a	94	#define jffs2_nor_wbuf_flash(c) (0)
1da177e4 LT	95	#define jffs2_nor_ecc_flash_setup(c) (0)
1da177e4 LT	96	#define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
751382dd TP	97	#define jffs2_dataflash_setup(c) (0)
751382dd TP	98	#define jffs2_dataflash_cleanup(c) do {} while (0)
59da721a NP	99	#define jffs2_nor_wbuf_flash_setup(c) (0)
59da721a NP	100	#define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0)
1da177e4 LT	101
	102	#else /* NAND and/or ECC'd NOR support present */
	103
8cd79216	104	#define jffs2_is_writebuffered(c) (c->wbuf != NULL)
2f82ce1e	105	#define SECTOR_ADDR(x) ( ((unsigned long)(x) / (unsigned long)(c->sector_size)) * c->sector_size )
e631ddba FH	106
	107	#ifdef CONFIG_JFFS2_SUMMARY
	108	#define jffs2_can_mark_obsolete(c) (0)
	109	#else
59da721a NP	110	#define jffs2_can_mark_obsolete(c) \
	111	((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & (MTD_ECC\|MTD_PROGRAM_REGIONS))) \|\| \
	112	c->mtd->type == MTD_RAM)
e631ddba FH	113	#endif
e631ddba FH	114
1da177e4 LT	115	#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
	116
	117	#define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
	118	#define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
	119	#define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
	120
	121	/* wbuf.c */
	122	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);
	123	int jffs2_flash_write(struct jffs2_sb_info c, loff_t ofs, size_t len, size_t retlen, const u_char *buf);
	124	int jffs2_flash_read(struct jffs2_sb_info c, loff_t ofs, size_t len, size_t retlen, u_char *buf);
	125	int jffs2_check_oob_empty(struct jffs2_sb_info c, struct jffs2_eraseblock jeb,int mode);
	126	int jffs2_check_nand_cleanmarker(struct jffs2_sb_info c, struct jffs2_eraseblock jeb);
	127	int jffs2_write_nand_cleanmarker(struct jffs2_sb_info c, struct jffs2_eraseblock jeb);
	128	int jffs2_write_nand_badblock(struct jffs2_sb_info c, struct jffs2_eraseblock jeb, uint32_t bad_offset);
	129	void jffs2_wbuf_timeout(unsigned long data);
	130	void jffs2_wbuf_process(void *data);
	131	int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
	132	int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
	133	int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
	134	void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
2f82ce1e	135
1da177e4 LT	136	#define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC))
	137	int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c);
	138	void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c);
2f82ce1e	139
8f15fd55 AV	140	#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
	141	int jffs2_dataflash_setup(struct jffs2_sb_info *c);
	142	void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
2f82ce1e	143
59da721a NP	144	#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_PROGRAM_REGIONS))
	145	int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
	146	void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);
	147
2f82ce1e	148	#endif /* WRITEBUFFER */
1da177e4 LT	149
	150	/* erase.c */
	151	static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
	152	{
	153	OFNI_BS_2SFFJ(c)->s_dirt = 1;
	154	}
	155
	156	/* background.c */
	157	int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
	158	void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
	159	void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
	160
	161	/* dir.c */
	162	extern struct file_operations jffs2_dir_operations;
	163	extern struct inode_operations jffs2_dir_inode_operations;
	164
	165	/* file.c */
	166	extern struct file_operations jffs2_file_operations;
	167	extern struct inode_operations jffs2_file_inode_operations;
	168	extern struct address_space_operations jffs2_file_address_operations;
	169	int jffs2_fsync(struct file , struct dentry , int);
	170	int jffs2_do_readpage_unlock (struct inode inode, struct page pg);
	171
	172	/* ioctl.c */
	173	int jffs2_ioctl(struct inode , struct file , unsigned int, unsigned long);
	174
	175	/* symlink.c */
	176	extern struct inode_operations jffs2_symlink_inode_operations;
	177
	178	/* fs.c */
	179	int jffs2_setattr (struct dentry , struct iattr );
	180	void jffs2_read_inode (struct inode *);
	181	void jffs2_clear_inode (struct inode *);
	182	void jffs2_dirty_inode(struct inode *inode);
	183	struct inode jffs2_new_inode (struct inode dir_i, int mode,
	184	struct jffs2_raw_inode *ri);
	185	int jffs2_statfs (struct super_block , struct kstatfs );
	186	void jffs2_write_super (struct super_block *);
	187	int jffs2_remount_fs (struct super_block , int , char *);
	188	int jffs2_do_fill_super(struct super_block sb, void data, int silent);
	189	void jffs2_gc_release_inode(struct jffs2_sb_info *c,
	190	struct jffs2_inode_info *f);
	191	struct jffs2_inode_info jffs2_gc_fetch_inode(struct jffs2_sb_info c,
	192	int inum, int nlink);
	193
	194	unsigned char jffs2_gc_fetch_page(struct jffs2_sb_info c,
	195	struct jffs2_inode_info *f,
	196	unsigned long offset,
	197	unsigned long *priv);
	198	void jffs2_gc_release_page(struct jffs2_sb_info *c,
	199	unsigned char *pg,
	200	unsigned long *priv);
	201	void jffs2_flash_cleanup(struct jffs2_sb_info *c);
	202
	203
	204	/* writev.c */
	205	int jffs2_flash_direct_writev(struct jffs2_sb_info c, const struct kvec vecs,
	206	unsigned long count, loff_t to, size_t *retlen);
e631ddba FH	207	int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
e631ddba FH	208	size_t retlen, const u_char buf);
1da177e4 LT	209
	210	#endif /* __JFFS2_OS_LINUX_H__ */
	211
	212