[net-next-2.6.git] / fs / jffs2 / jffs2_fs_i.h

/*
 * JFFS2 -- Journalling Flash File System, Version 2.
 *
 * Copyright © 2001-2007 Red Hat, Inc.
 * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org>
 *
 * Created by David Woodhouse <dwmw2@infradead.org>
 *
 * For licensing information, see the file 'LICENCE' in this directory.
 *
 */

#ifndef _JFFS2_FS_I
#define _JFFS2_FS_I

#include <linux/rbtree.h>
#include <linux/posix_acl.h>
#include <linux/mutex.h>

struct jffs2_inode_info {
	/* We need an internal mutex similar to inode->i_mutex.
	   Unfortunately, we can't used the existing one, because
	   either the GC would deadlock, or we'd have to release it
	   before letting GC proceed. Or we'd have to put ugliness
	   into the GC code so it didn't attempt to obtain the i_mutex
	   for the inode(s) which are already locked */
	struct mutex sem;

	/* The highest (datanode) version number used for this ino */
	uint32_t highest_version;

	/* List of data fragments which make up the file */
	struct rb_root fragtree;

	/* There may be one datanode which isn't referenced by any of the
	   above fragments, if it contains a metadata update but no actual
	   data - or if this is a directory inode */
	/* This also holds the _only_ dnode for symlinks/device nodes,
	   etc. */
	struct jffs2_full_dnode *metadata;

	/* Directory entries */
	struct jffs2_full_dirent *dents;

	/* The target path if this is the inode of a symlink */
	unsigned char *target;

	/* Some stuff we just have to keep in-core at all times, for each inode. */
	struct jffs2_inode_cache *inocache;

	uint16_t flags;
	uint8_t usercompr;
	struct inode vfs_inode;
};

#endif /* _JFFS2_FS_I */
Commit	Line	Data
c00c310e DW	1	/*
	2	* JFFS2 -- Journalling Flash File System, Version 2.
	3	*
	4	* Copyright © 2001-2007 Red Hat, Inc.
6088c058	5	* Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org>
c00c310e DW	6	*
	7	* Created by David Woodhouse <dwmw2@infradead.org>
	8	*
	9	* For licensing information, see the file 'LICENCE' in this directory.
	10	*
	11	*/
1da177e4 LT	12
	13	#ifndef _JFFS2_FS_I
	14	#define _JFFS2_FS_I
	15
1da177e4	16	#include <linux/rbtree.h>
aa98d7cf	17	#include <linux/posix_acl.h>
cf9d1e42	18	#include <linux/mutex.h>
1da177e4 LT	19
1da177e4 LT	20	struct jffs2_inode_info {
1b1dcc1b	21	/* We need an internal mutex similar to inode->i_mutex.
1da177e4 LT	22	Unfortunately, we can't used the existing one, because
	23	either the GC would deadlock, or we'd have to release it
	24	before letting GC proceed. Or we'd have to put ugliness
1b1dcc1b	25	into the GC code so it didn't attempt to obtain the i_mutex
1da177e4	26	for the inode(s) which are already locked */
ced22070	27	struct mutex sem;
1da177e4 LT	28
	29	/* The highest (datanode) version number used for this ino */
	30	uint32_t highest_version;
	31
	32	/* List of data fragments which make up the file */
	33	struct rb_root fragtree;
	34
	35	/* There may be one datanode which isn't referenced by any of the
	36	above fragments, if it contains a metadata update but no actual
	37	data - or if this is a directory inode */
182ec4ee	38	/* This also holds the _only_ dnode for symlinks/device nodes,
1da177e4 LT	39	etc. */
	40	struct jffs2_full_dnode *metadata;
	41
	42	/* Directory entries */
	43	struct jffs2_full_dirent *dents;
	44
2b79adcc AB	45	/* The target path if this is the inode of a symlink */
	46	unsigned char *target;
	47
1da177e4 LT	48	/* Some stuff we just have to keep in-core at all times, for each inode. */
	49	struct jffs2_inode_cache *inocache;
	50
	51	uint16_t flags;
	52	uint8_t usercompr;
1da177e4	53	struct inode vfs_inode;
1da177e4 LT	54	};
	55
	56	#endif /* _JFFS2_FS_I */