LXR linux/fs/gfs2/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
  15extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
  16extern int gfs2_internal_read(struct gfs2_inode *ip,
  17                              char *buf, loff_t *pos, unsigned size);
  18extern void 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 <<
  48                (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
  49}
  50
  51static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
  52{
  53        return inode->i_blocks >>
  54                (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
  55}
  56
  57static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
  58{
  59        change <<= inode->i_blkbits - GFS2_BASIC_BLOCK_SHIFT;
  60        gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks >= -change));
  61        inode->i_blocks += change;
  62}
  63
  64static 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
  70static 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
  77static 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;
  83        if (size & (BIT(inode->i_blkbits) - 1))
  84                goto err;
  85        return 0;
  86err:
  87        gfs2_consist_inode(GFS2_I(inode));
  88        return -EIO;
  89}
  90
  91extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, 
  92                                       u64 no_addr, u64 no_formal_ino,
  93                                       unsigned int blktype);
  94extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
  95                                         u64 *no_formal_ino,
  96                                         unsigned int blktype);
  97
  98extern int gfs2_inode_refresh(struct gfs2_inode *ip);
  99
 100extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
 101                                  int is_root);
 102extern int gfs2_permission(struct inode *inode, int mask);
 103extern int gfs2_setattr_simple(struct inode *inode, struct iattr *attr);
 104extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
 105extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
 106extern int gfs2_open_common(struct inode *inode, struct file *file);
 107extern loff_t gfs2_seek_data(struct file *file, loff_t offset);
 108extern loff_t gfs2_seek_hole(struct file *file, loff_t offset);
 109
 110extern const struct inode_operations gfs2_file_iops;
 111extern const struct inode_operations gfs2_dir_iops;
 112extern const struct inode_operations gfs2_symlink_iops;
 113extern const struct file_operations gfs2_file_fops_nolock;
 114extern const struct file_operations gfs2_dir_fops_nolock;
 115
 116extern void gfs2_set_inode_flags(struct inode *inode);
 117 
 118#ifdef CONFIG_GFS2_FS_LOCKING_DLM
 119extern const struct file_operations gfs2_file_fops;
 120extern const struct file_operations gfs2_dir_fops;
 121
 122static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
 123{
 124        return sdp->sd_args.ar_localflocks;
 125}
 126#else /* Single node only */
 127#define gfs2_file_fops gfs2_file_fops_nolock
 128#define gfs2_dir_fops gfs2_dir_fops_nolock
 129
 130static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
 131{
 132        return 1;
 133}
 134#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
 135
 136#endif /* __INODE_DOT_H__ */
 137
 138