[deliverable/linux.git] / fs / gfs2 / inode.h

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#ifndef __INODE_DOT_H__
#define __INODE_DOT_H__

#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/mm.h>
#include "util.h"

extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
extern int gfs2_internal_read(struct gfs2_inode *ip,
			      struct file_ra_state *ra_state,
			      char *buf, loff_t *pos, unsigned size);
extern void gfs2_set_aops(struct inode *inode);

static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
{
	return !ip->i_height;
}

static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
{
	return ip->i_diskflags & GFS2_DIF_JDATA;
}

static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
{
	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
}

static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
{
	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
}

static inline int gfs2_is_dir(const struct gfs2_inode *ip)
{
	return S_ISDIR(ip->i_inode.i_mode);
}

static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
{
	inode->i_blocks = blocks <<
		(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
}

static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
{
	return inode->i_blocks >>
		(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
}

static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
{
	gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change));
	change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
	inode->i_blocks += change;
}

static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
				  u64 no_formal_ino)
{
	return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
}

static inline void gfs2_inum_out(const struct gfs2_inode *ip,
				 struct gfs2_dirent *dent)
{
	dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
	dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
}


extern void gfs2_set_iop(struct inode *inode);
extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, 
				       u64 no_addr, u64 no_formal_ino,
				       int skip_freeing);
extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);

extern int gfs2_inode_refresh(struct gfs2_inode *ip);

extern int gfs2_dinode_dealloc(struct gfs2_inode *inode);
extern int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
				  int is_root);
extern struct inode *gfs2_createi(struct gfs2_holder *ghs,
				  const struct qstr *name,
				  unsigned int mode, dev_t dev);
extern int gfs2_permission(struct inode *inode, int mask);
extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
extern void gfs2_dinode_print(const struct gfs2_inode *ip);

extern const struct inode_operations gfs2_file_iops;
extern const struct inode_operations gfs2_dir_iops;
extern const struct inode_operations gfs2_symlink_iops;
extern const struct file_operations gfs2_file_fops_nolock;
extern const struct file_operations gfs2_dir_fops_nolock;

extern void gfs2_set_inode_flags(struct inode *inode);
 
#ifdef CONFIG_GFS2_FS_LOCKING_DLM
extern const struct file_operations gfs2_file_fops;
extern const struct file_operations gfs2_dir_fops;

static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
{
	return sdp->sd_args.ar_localflocks;
}
#else /* Single node only */
#define gfs2_file_fops gfs2_file_fops_nolock
#define gfs2_dir_fops gfs2_dir_fops_nolock

static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
{
	return 1;
}
#endif /* CONFIG_GFS2_FS_LOCKING_DLM */

#endif /* __INODE_DOT_H__ */
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
	9
	10	#ifndef __INODE_DOT_H__
	11	#define __INODE_DOT_H__
	12
b2760583	13	#include <linux/fs.h>
b1e71b06 SW	14	#include <linux/buffer_head.h>
b1e71b06 SW	15	#include <linux/mm.h>
77658aad SW	16	#include "util.h"
77658aad SW	17
b1e71b06 SW	18	extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
	19	extern int gfs2_internal_read(struct gfs2_inode *ip,
	20	struct file_ra_state *ra_state,
	21	char buf, loff_t pos, unsigned size);
	22	extern void gfs2_set_aops(struct inode *inode);
	23
dbb7cae2	24	static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
b3b94faa	25	{
ecc30c79	26	return !ip->i_height;
b3b94faa DT	27	}
b3b94faa DT	28
dbb7cae2	29	static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
b3b94faa	30	{
383f01fb	31	return ip->i_diskflags & GFS2_DIF_JDATA;
b3b94faa DT	32	}
b3b94faa DT	33
bf36a713 SW	34	static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
	35	{
	36	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	37	return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
	38	}
	39
5561093e SW	40	static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
	41	{
	42	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	43	return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
	44	}
	45
dbb7cae2	46	static inline int gfs2_is_dir(const struct gfs2_inode *ip)
18ec7d5c	47	{
b60623c2	48	return S_ISDIR(ip->i_inode.i_mode);
18ec7d5c SW	49	}
18ec7d5c SW	50
77658aad SW	51	static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
	52	{
	53	inode->i_blocks = blocks <<
	54	(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
	55	}
	56
	57	static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
9e2dbdac	58	{
77658aad	59	return inode->i_blocks >>
9e2dbdac SW	60	(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
	61	}
	62
77658aad SW	63	static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
	64	{
	65	gfs2_assert(GFS2_SB(inode), (change >= 0 \|\| inode->i_blocks > -change));
	66	change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
	67	inode->i_blocks += change;
	68	}
	69
dbb7cae2 SW	70	static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
	71	u64 no_formal_ino)
	72	{
	73	return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
	74	}
	75
bb8d8a6f SW	76	static inline void gfs2_inum_out(const struct gfs2_inode *ip,
	77	struct gfs2_dirent *dent)
	78	{
	79	dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
	80	dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
	81	}
	82
	83
b1e71b06 SW	84	extern void gfs2_set_iop(struct inode *inode);
	85	extern struct inode gfs2_inode_lookup(struct super_block sb, unsigned type,
	86	u64 no_addr, u64 no_formal_ino,
	87	int skip_freeing);
	88	extern struct inode gfs2_ilookup(struct super_block sb, u64 no_addr);
	89
	90	extern int gfs2_inode_refresh(struct gfs2_inode *ip);
	91
	92	extern int gfs2_dinode_dealloc(struct gfs2_inode *inode);
	93	extern int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
	94	extern struct inode gfs2_lookupi(struct inode dir, const struct qstr *name,
	95	int is_root);
	96	extern struct inode gfs2_createi(struct gfs2_holder ghs,
	97	const struct qstr *name,
	98	unsigned int mode, dev_t dev);
b1e71b06	99	extern int gfs2_permission(struct inode *inode, int mask);
b1e71b06 SW	100	extern int gfs2_setattr_simple(struct gfs2_inode ip, struct iattr attr);
	101	extern struct inode gfs2_lookup_simple(struct inode dip, const char *name);
	102	extern void gfs2_dinode_out(const struct gfs2_inode ip, void buf);
	103	extern void gfs2_dinode_print(const struct gfs2_inode *ip);
b3b94faa	104
b2760583 SW	105	extern const struct inode_operations gfs2_file_iops;
	106	extern const struct inode_operations gfs2_dir_iops;
	107	extern const struct inode_operations gfs2_symlink_iops;
10d21988 CH	108	extern const struct file_operations gfs2_file_fops_nolock;
10d21988 CH	109	extern const struct file_operations gfs2_dir_fops_nolock;
b2760583 SW	110
b2760583 SW	111	extern void gfs2_set_inode_flags(struct inode *inode);
f057f6cd SW	112
f057f6cd SW	113	#ifdef CONFIG_GFS2_FS_LOCKING_DLM
10d21988 CH	114	extern const struct file_operations gfs2_file_fops;
	115	extern const struct file_operations gfs2_dir_fops;
	116
f057f6cd SW	117	static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
	118	{
	119	return sdp->sd_args.ar_localflocks;
	120	}
	121	#else /* Single node only */
10d21988 CH	122	#define gfs2_file_fops gfs2_file_fops_nolock
	123	#define gfs2_dir_fops gfs2_dir_fops_nolock
	124
f057f6cd SW	125	static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
	126	{
	127	return 1;
	128	}
	129	#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
b2760583	130
b3b94faa DT	131	#endif /* __INODE_DOT_H__ */
b3b94faa DT	132