[net-next-2.6.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_page_add_databufs(struct gfs2_inode *ip, struct page *page,
				   unsigned int from, unsigned int to);
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);
}

static inline int gfs2_check_internal_file_size(struct inode *inode,
						u64 minsize, u64 maxsize)
{
	u64 size = i_size_read(inode);
	if (size < minsize || size > maxsize)
		goto err;
	if (size & ((1 << inode->i_blkbits) - 1))
		goto err;
	return 0;
err:
	gfs2_consist_inode(GFS2_I(inode));
	return -EIO;
}

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);
extern void gfs2_process_unlinked_inode(struct super_block *sb, u64 no_addr);
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);
3921120e BM	22	extern void gfs2_page_add_databufs(struct gfs2_inode ip, struct page page,
3921120e BM	23	unsigned int from, unsigned int to);
b1e71b06 SW	24	extern void gfs2_set_aops(struct inode *inode);
b1e71b06 SW	25
dbb7cae2	26	static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
b3b94faa	27	{
ecc30c79	28	return !ip->i_height;
b3b94faa DT	29	}
b3b94faa DT	30
dbb7cae2	31	static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
b3b94faa	32	{
383f01fb	33	return ip->i_diskflags & GFS2_DIF_JDATA;
b3b94faa DT	34	}
b3b94faa DT	35
bf36a713 SW	36	static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
	37	{
	38	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	39	return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
	40	}
	41
5561093e SW	42	static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
	43	{
	44	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	45	return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
	46	}
	47
dbb7cae2	48	static inline int gfs2_is_dir(const struct gfs2_inode *ip)
18ec7d5c	49	{
b60623c2	50	return S_ISDIR(ip->i_inode.i_mode);
18ec7d5c SW	51	}
18ec7d5c SW	52
77658aad SW	53	static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
	54	{
	55	inode->i_blocks = blocks <<
	56	(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
	57	}
	58
	59	static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
9e2dbdac	60	{
77658aad	61	return inode->i_blocks >>
9e2dbdac SW	62	(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
	63	}
	64
77658aad SW	65	static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
	66	{
	67	gfs2_assert(GFS2_SB(inode), (change >= 0 \|\| inode->i_blocks > -change));
	68	change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
	69	inode->i_blocks += change;
	70	}
	71
dbb7cae2 SW	72	static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
	73	u64 no_formal_ino)
	74	{
	75	return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
	76	}
	77
bb8d8a6f SW	78	static inline void gfs2_inum_out(const struct gfs2_inode *ip,
	79	struct gfs2_dirent *dent)
	80	{
	81	dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
	82	dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
	83	}
	84
a2e0f799 SW	85	static inline int gfs2_check_internal_file_size(struct inode *inode,
	86	u64 minsize, u64 maxsize)
	87	{
	88	u64 size = i_size_read(inode);
	89	if (size < minsize \|\| size > maxsize)
	90	goto err;
	91	if (size & ((1 << inode->i_blkbits) - 1))
	92	goto err;
	93	return 0;
	94	err:
	95	gfs2_consist_inode(GFS2_I(inode));
	96	return -EIO;
	97	}
bb8d8a6f	98
b1e71b06 SW	99	extern void gfs2_set_iop(struct inode *inode);
b1e71b06 SW	100	extern struct inode gfs2_inode_lookup(struct super_block sb, unsigned type,
1a0eae88	101	u64 no_addr, u64 no_formal_ino);
ed4878e8	102	extern void gfs2_process_unlinked_inode(struct super_block *sb, u64 no_addr);
b1e71b06 SW	103	extern struct inode gfs2_ilookup(struct super_block sb, u64 no_addr);
	104
	105	extern int gfs2_inode_refresh(struct gfs2_inode *ip);
	106
	107	extern int gfs2_dinode_dealloc(struct gfs2_inode *inode);
	108	extern int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
	109	extern struct inode gfs2_lookupi(struct inode dir, const struct qstr *name,
	110	int is_root);
	111	extern struct inode gfs2_createi(struct gfs2_holder ghs,
	112	const struct qstr *name,
	113	unsigned int mode, dev_t dev);
b1e71b06	114	extern int gfs2_permission(struct inode *inode, int mask);
b1e71b06 SW	115	extern int gfs2_setattr_simple(struct gfs2_inode ip, struct iattr attr);
	116	extern struct inode gfs2_lookup_simple(struct inode dip, const char *name);
	117	extern void gfs2_dinode_out(const struct gfs2_inode ip, void buf);
	118	extern void gfs2_dinode_print(const struct gfs2_inode *ip);
b3b94faa	119
b2760583 SW	120	extern const struct inode_operations gfs2_file_iops;
	121	extern const struct inode_operations gfs2_dir_iops;
	122	extern const struct inode_operations gfs2_symlink_iops;
10d21988 CH	123	extern const struct file_operations gfs2_file_fops_nolock;
10d21988 CH	124	extern const struct file_operations gfs2_dir_fops_nolock;
b2760583 SW	125
b2760583 SW	126	extern void gfs2_set_inode_flags(struct inode *inode);
f057f6cd SW	127
f057f6cd SW	128	#ifdef CONFIG_GFS2_FS_LOCKING_DLM
10d21988 CH	129	extern const struct file_operations gfs2_file_fops;
	130	extern const struct file_operations gfs2_dir_fops;
	131
f057f6cd SW	132	static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
	133	{
	134	return sdp->sd_args.ar_localflocks;
	135	}
	136	#else /* Single node only */
10d21988 CH	137	#define gfs2_file_fops gfs2_file_fops_nolock
	138	#define gfs2_dir_fops gfs2_dir_fops_nolock
	139
f057f6cd SW	140	static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
	141	{
	142	return 1;
	143	}
	144	#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
b2760583	145
b3b94faa DT	146	#endif /* __INODE_DOT_H__ */
b3b94faa DT	147