[mirror_ubuntu-jammy-kernel.git] / fs / gfs2 / inode.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 */

#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 bool gfs2_is_ordered(const struct gfs2_sbd *sdp)
{
	return sdp->sd_args.ar_data == GFS2_DATA_ORDERED;
}

static inline bool gfs2_is_writeback(const struct gfs2_sbd *sdp)
{
	return sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK;
}

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)
{
	change <<= inode->i_blkbits - GFS2_BASIC_BLOCK_SHIFT;
	gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks >= -change));
	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 user_namespace *mnt_userns,
			   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 loff_t gfs2_seek_data(struct file *file, loff_t offset);
extern loff_t gfs2_seek_hole(struct file *file, loff_t offset);

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
7336d0e6	1	/* SPDX-License-Identifier: GPL-2.0-only */
b3b94faa DT	2	/*
b3b94faa DT	3	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	4	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	5	*/
	6
	7	#ifndef __INODE_DOT_H__
	8	#define __INODE_DOT_H__
	9
b2760583	10	#include <linux/fs.h>
b1e71b06 SW	11	#include <linux/buffer_head.h>
b1e71b06 SW	12	#include <linux/mm.h>
77658aad SW	13	#include "util.h"
77658aad SW	14
b1e71b06 SW	15	extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
b1e71b06 SW	16	extern int gfs2_internal_read(struct gfs2_inode *ip,
b1e71b06 SW	17	char buf, loff_t pos, unsigned size);
	18	extern void gfs2_set_aops(struct inode *inode);
	19
dbb7cae2	20	static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
b3b94faa	21	{
ecc30c79	22	return !ip->i_height;
b3b94faa DT	23	}
b3b94faa DT	24
dbb7cae2	25	static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
b3b94faa	26	{
383f01fb	27	return ip->i_diskflags & GFS2_DIF_JDATA;
b3b94faa DT	28	}
b3b94faa DT	29
977767a7	30	static inline bool gfs2_is_ordered(const struct gfs2_sbd *sdp)
bf36a713	31	{
977767a7	32	return sdp->sd_args.ar_data == GFS2_DATA_ORDERED;
bf36a713 SW	33	}
bf36a713 SW	34
977767a7	35	static inline bool gfs2_is_writeback(const struct gfs2_sbd *sdp)
5561093e	36	{
977767a7	37	return sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK;
5561093e SW	38	}
5561093e SW	39
dbb7cae2	40	static inline int gfs2_is_dir(const struct gfs2_inode *ip)
18ec7d5c	41	{
b60623c2	42	return S_ISDIR(ip->i_inode.i_mode);
18ec7d5c SW	43	}
18ec7d5c SW	44
77658aad SW	45	static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
	46	{
	47	inode->i_blocks = blocks <<
	48	(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
	49	}
	50
	51	static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
9e2dbdac	52	{
77658aad	53	return inode->i_blocks >>
9e2dbdac SW	54	(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
	55	}
	56
77658aad SW	57	static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
77658aad SW	58	{
7c03e756 TS	59	change <<= inode->i_blkbits - GFS2_BASIC_BLOCK_SHIFT;
7c03e756 TS	60	gfs2_assert(GFS2_SB(inode), (change >= 0 \|\| inode->i_blocks >= -change));
77658aad SW	61	inode->i_blocks += change;
	62	}
	63
dbb7cae2 SW	64	static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
	65	u64 no_formal_ino)
	66	{
	67	return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
	68	}
	69
bb8d8a6f SW	70	static inline void gfs2_inum_out(const struct gfs2_inode *ip,
	71	struct gfs2_dirent *dent)
	72	{
	73	dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
	74	dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
	75	}
	76
a2e0f799 SW	77	static inline int gfs2_check_internal_file_size(struct inode *inode,
	78	u64 minsize, u64 maxsize)
	79	{
	80	u64 size = i_size_read(inode);
	81	if (size < minsize \|\| size > maxsize)
	82	goto err;
47a9a527	83	if (size & (BIT(inode->i_blkbits) - 1))
a2e0f799 SW	84	goto err;
	85	return 0;
	86	err:
	87	gfs2_consist_inode(GFS2_I(inode));
	88	return -EIO;
	89	}
bb8d8a6f	90
b1e71b06	91	extern struct inode gfs2_inode_lookup(struct super_block sb, unsigned type,
3ce37b2c AG	92	u64 no_addr, u64 no_formal_ino,
3ce37b2c AG	93	unsigned int blktype);
044b9414	94	extern struct inode gfs2_lookup_by_inum(struct gfs2_sbd sdp, u64 no_addr,
6bdcadea	95	u64 no_formal_ino,
044b9414	96	unsigned int blktype);
b1e71b06 SW	97
	98	extern int gfs2_inode_refresh(struct gfs2_inode *ip);
	99
b1e71b06 SW	100	extern struct inode gfs2_lookupi(struct inode dir, const struct qstr *name,
b1e71b06 SW	101	int is_root);
549c7297 CB	102	extern int gfs2_permission(struct user_namespace *mnt_userns,
549c7297 CB	103	struct inode *inode, int mask);
ab9bbda0	104	extern int gfs2_setattr_simple(struct inode inode, struct iattr attr);
b1e71b06 SW	105	extern struct inode gfs2_lookup_simple(struct inode dip, const char *name);
b1e71b06 SW	106	extern void gfs2_dinode_out(const struct gfs2_inode ip, void buf);
6d4ade98	107	extern int gfs2_open_common(struct inode inode, struct file file);
3a27411c AG	108	extern loff_t gfs2_seek_data(struct file *file, loff_t offset);
3a27411c AG	109	extern loff_t gfs2_seek_hole(struct file *file, loff_t offset);
b3b94faa	110
10d21988 CH	111	extern const struct file_operations gfs2_file_fops_nolock;
10d21988 CH	112	extern const struct file_operations gfs2_dir_fops_nolock;
b2760583 SW	113
b2760583 SW	114	extern void gfs2_set_inode_flags(struct inode *inode);
f057f6cd SW	115
f057f6cd SW	116	#ifdef CONFIG_GFS2_FS_LOCKING_DLM
10d21988 CH	117	extern const struct file_operations gfs2_file_fops;
	118	extern const struct file_operations gfs2_dir_fops;
	119
f057f6cd SW	120	static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
	121	{
	122	return sdp->sd_args.ar_localflocks;
	123	}
	124	#else /* Single node only */
10d21988 CH	125	#define gfs2_file_fops gfs2_file_fops_nolock
	126	#define gfs2_dir_fops gfs2_dir_fops_nolock
	127
f057f6cd SW	128	static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
	129	{
	130	return 1;
	131	}
	132	#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
b2760583	133
b3b94faa DT	134	#endif /* __INODE_DOT_H__ */
b3b94faa DT	135