inode.h

  1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  4 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
  5 */
  6
  7#ifndef __INODE_DOT_H__
  8#define __INODE_DOT_H__
  9
 10#include <linux/fs.h>
 11#include <linux/buffer_head.h>
 12#include <linux/mm.h>
 13#include "util.h"
 14
 15bool gfs2_release_folio(struct folio *folio, gfp_t gfp_mask);
 16ssize_t gfs2_internal_read(struct gfs2_inode *ip,
 17			   char *buf, loff_t *pos, size_t size);
 18void gfs2_set_aops(struct inode *inode);
 19
 20static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
 21{
 22	return !ip->i_height;
 23}
 24
 25static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
 26{
 27	return ip->i_diskflags & GFS2_DIF_JDATA;
 28}
 29
 30static inline bool gfs2_is_ordered(const struct gfs2_sbd *sdp)
 31{
 32	return sdp->sd_args.ar_data == GFS2_DATA_ORDERED;
 33}
 34
 35static inline bool gfs2_is_writeback(const struct gfs2_sbd *sdp)
 36{
 37	return sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK;
 38}
 39
 40static inline int gfs2_is_dir(const struct gfs2_inode *ip)
 41{
 42	return S_ISDIR(ip->i_inode.i_mode);
 43}
 44
 45static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
 46{
 47	inode->i_blocks = blocks << (inode->i_blkbits - SECTOR_SHIFT);
 48}
 49
 50static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
 51{
 52	return inode->i_blocks >> (inode->i_blkbits - SECTOR_SHIFT);
 53}
 54
 55static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
 56{
 57	change <<= inode->i_blkbits - SECTOR_SHIFT;
 58	gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks >= -change));
 59	inode->i_blocks += change;
 60}
 61
 62static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
 63				  u64 no_formal_ino)
 64{
 65	return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
 66}
 67
 68static inline void gfs2_inum_out(const struct gfs2_inode *ip,
 69				 struct gfs2_dirent *dent)
 70{
 71	dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
 72	dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
 73}
 74
 75static inline int gfs2_check_internal_file_size(struct inode *inode,
 76						u64 minsize, u64 maxsize)
 77{
 78	u64 size = i_size_read(inode);
 79	if (size < minsize || size > maxsize)
 80		goto err;
 81	if (size & (BIT(inode->i_blkbits) - 1))
 82		goto err;
 83	return 0;
 84err:
 85	gfs2_consist_inode(GFS2_I(inode));
 86	return -EIO;
 87}
 88
 89void gfs2_setup_inode(struct inode *inode);
 90struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
 91			        u64 no_addr, u64 no_formal_ino,
 92			        unsigned int blktype);
 93struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
 94				  u64 no_formal_ino,
 95				  unsigned int blktype);
 96int gfs2_dinode_dealloc(struct gfs2_inode *ip);
 97
 98struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
 99			   int is_root);
100int gfs2_permission(struct mnt_idmap *idmap,
101		    struct inode *inode, int mask);
102struct inode *gfs2_lookup_meta(struct inode *dip, const char *name);
103void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
104int gfs2_open_common(struct inode *inode, struct file *file);
105loff_t gfs2_seek_data(struct file *file, loff_t offset);
106loff_t gfs2_seek_hole(struct file *file, loff_t offset);
107
108extern const struct file_operations gfs2_file_fops_nolock;
109extern const struct file_operations gfs2_dir_fops_nolock;
110
111int gfs2_fileattr_get(struct dentry *dentry, struct file_kattr *fa);
112int gfs2_fileattr_set(struct mnt_idmap *idmap,
113		      struct dentry *dentry, struct file_kattr *fa);
114void gfs2_set_inode_flags(struct inode *inode);
115
116#ifdef CONFIG_GFS2_FS_LOCKING_DLM
117extern const struct file_operations gfs2_file_fops;
118extern const struct file_operations gfs2_dir_fops;
119
120static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
121{
122	return sdp->sd_args.ar_localflocks;
123}
124#else /* Single node only */
125#define gfs2_file_fops gfs2_file_fops_nolock
126#define gfs2_dir_fops gfs2_dir_fops_nolock
127
128static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
129{
130	return 1;
131}
132#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
133
134#endif /* __INODE_DOT_H__ */
135