[linux-2.6-block.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,
			      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);
}

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 & (BIT(inode->i_blkbits) - 1))
		goto err;
	return 0;
err:
	gfs2_consist_inode(GFS2_I(inode));
	return -EIO;
}

extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, 
				       u64 no_addr, u64 no_formal_ino,
				       unsigned int blktype);
extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
					 u64 *no_formal_ino,
					 unsigned int blktype);

extern int gfs2_inode_refresh(struct gfs2_inode *ip);

extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
				  int is_root);
extern int gfs2_permission(struct inode *inode, int mask);
extern int gfs2_setattr_simple(struct inode *inode, 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 int gfs2_open_common(struct inode *inode, struct file *file);

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);
b1e71b06 SW	19	extern int gfs2_internal_read(struct gfs2_inode *ip,
b1e71b06 SW	20	char buf, loff_t pos, unsigned size);
	21	extern void gfs2_set_aops(struct inode *inode);
	22
dbb7cae2	23	static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
b3b94faa	24	{
ecc30c79	25	return !ip->i_height;
b3b94faa DT	26	}
b3b94faa DT	27
dbb7cae2	28	static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
b3b94faa	29	{
383f01fb	30	return ip->i_diskflags & GFS2_DIF_JDATA;
b3b94faa DT	31	}
b3b94faa DT	32
bf36a713 SW	33	static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
	34	{
	35	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	36	return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
	37	}
	38
5561093e SW	39	static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
	40	{
	41	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	42	return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
	43	}
	44
dbb7cae2	45	static inline int gfs2_is_dir(const struct gfs2_inode *ip)
18ec7d5c	46	{
b60623c2	47	return S_ISDIR(ip->i_inode.i_mode);
18ec7d5c SW	48	}
18ec7d5c SW	49
77658aad SW	50	static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
	51	{
	52	inode->i_blocks = blocks <<
	53	(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
	54	}
	55
	56	static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
9e2dbdac	57	{
77658aad	58	return inode->i_blocks >>
9e2dbdac SW	59	(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
	60	}
	61
77658aad SW	62	static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
	63	{
	64	gfs2_assert(GFS2_SB(inode), (change >= 0 \|\| inode->i_blocks > -change));
	65	change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
	66	inode->i_blocks += change;
	67	}
	68
dbb7cae2 SW	69	static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
	70	u64 no_formal_ino)
	71	{
	72	return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
	73	}
	74
bb8d8a6f SW	75	static inline void gfs2_inum_out(const struct gfs2_inode *ip,
	76	struct gfs2_dirent *dent)
	77	{
	78	dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
	79	dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
	80	}
	81
a2e0f799 SW	82	static inline int gfs2_check_internal_file_size(struct inode *inode,
	83	u64 minsize, u64 maxsize)
	84	{
	85	u64 size = i_size_read(inode);
	86	if (size < minsize \|\| size > maxsize)
	87	goto err;
47a9a527	88	if (size & (BIT(inode->i_blkbits) - 1))
a2e0f799 SW	89	goto err;
	90	return 0;
	91	err:
	92	gfs2_consist_inode(GFS2_I(inode));
	93	return -EIO;
	94	}
bb8d8a6f	95
b1e71b06	96	extern struct inode gfs2_inode_lookup(struct super_block sb, unsigned type,
3ce37b2c AG	97	u64 no_addr, u64 no_formal_ino,
3ce37b2c AG	98	unsigned int blktype);
044b9414 SW	99	extern struct inode gfs2_lookup_by_inum(struct gfs2_sbd sdp, u64 no_addr,
	100	u64 *no_formal_ino,
	101	unsigned int blktype);
b1e71b06 SW	102
	103	extern int gfs2_inode_refresh(struct gfs2_inode *ip);
	104
b1e71b06 SW	105	extern struct inode gfs2_lookupi(struct inode dir, const struct qstr *name,
b1e71b06 SW	106	int is_root);
10556cb2	107	extern int gfs2_permission(struct inode *inode, int mask);
ab9bbda0	108	extern int gfs2_setattr_simple(struct inode inode, struct iattr attr);
b1e71b06 SW	109	extern struct inode gfs2_lookup_simple(struct inode dip, const char *name);
b1e71b06 SW	110	extern void gfs2_dinode_out(const struct gfs2_inode ip, void buf);
6d4ade98	111	extern int gfs2_open_common(struct inode inode, struct file file);
b3b94faa	112
b2760583 SW	113	extern const struct inode_operations gfs2_file_iops;
	114	extern const struct inode_operations gfs2_dir_iops;
	115	extern const struct inode_operations gfs2_symlink_iops;
10d21988 CH	116	extern const struct file_operations gfs2_file_fops_nolock;
10d21988 CH	117	extern const struct file_operations gfs2_dir_fops_nolock;
b2760583 SW	118
b2760583 SW	119	extern void gfs2_set_inode_flags(struct inode *inode);
f057f6cd SW	120
f057f6cd SW	121	#ifdef CONFIG_GFS2_FS_LOCKING_DLM
10d21988 CH	122	extern const struct file_operations gfs2_file_fops;
	123	extern const struct file_operations gfs2_dir_fops;
	124
f057f6cd SW	125	static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
	126	{
	127	return sdp->sd_args.ar_localflocks;
	128	}
	129	#else /* Single node only */
10d21988 CH	130	#define gfs2_file_fops gfs2_file_fops_nolock
	131	#define gfs2_dir_fops gfs2_dir_fops_nolock
	132
f057f6cd SW	133	static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
	134	{
	135	return 1;
	136	}
	137	#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
b2760583	138
b3b94faa DT	139	#endif /* __INODE_DOT_H__ */
b3b94faa DT	140