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
  15 extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
  16 extern int gfs2_internal_read(struct gfs2_inode *ip,
  17                               char *buf, loff_t *pos, unsigned size);
  18 extern void gfs2_set_aops(struct inode *inode);
  19
  20 static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
  21 {
  22         return !ip->i_height;
  23 }
  24
  25 static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
  26 {
  27         return ip->i_diskflags & GFS2_DIF_JDATA;
  28 }
  29
  30 static inline bool gfs2_is_ordered(const struct gfs2_sbd *sdp)
  31 {
  32         return sdp->sd_args.ar_data == GFS2_DATA_ORDERED;
  33 }
  34
  35 static inline bool gfs2_is_writeback(const struct gfs2_sbd *sdp)
  36 {
  37         return sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK;
  38 }
  39
  40 static inline int gfs2_is_dir(const struct gfs2_inode *ip)
  41 {
  42         return S_ISDIR(ip->i_inode.i_mode);
  43 }
  44
  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)
  52 {
  53         return inode->i_blocks >>
  54                 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
  55 }
  56
  57 static 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
  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
  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
  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;
  83         if (size & (BIT(inode->i_blkbits) - 1))
  84                 goto err;
  85         return 0;
  86 err:
  87         gfs2_consist_inode(GFS2_I(inode));
  88         return -EIO;
  89 }
  90
  91 extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
  92                                        u64 no_addr, u64 no_formal_ino,
  93                                        unsigned int blktype);
  94 extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
  95                                          u64 no_formal_ino,
  96                                          unsigned int blktype);
  97
  98 extern int gfs2_inode_refresh(struct gfs2_inode *ip);
  99
 100 extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
 101                                   int is_root);
 102 extern int gfs2_permission(struct inode *inode, int mask);
 103 extern int gfs2_setattr_simple(struct inode *inode, struct iattr *attr);
 104 extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
 105 extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
 106 extern int gfs2_open_common(struct inode *inode, struct file *file);
 107 extern loff_t gfs2_seek_data(struct file *file, loff_t offset);
 108 extern loff_t gfs2_seek_hole(struct file *file, loff_t offset);
 109
 110 extern const struct inode_operations gfs2_file_iops;
 111 extern const struct inode_operations gfs2_dir_iops;
 112 extern const struct inode_operations gfs2_symlink_iops;
 113 extern const struct file_operations gfs2_file_fops_nolock;
 114 extern const struct file_operations gfs2_dir_fops_nolock;
 115
 116 extern void gfs2_set_inode_flags(struct inode *inode);
 117
 118 #ifdef CONFIG_GFS2_FS_LOCKING_DLM
 119 extern const struct file_operations gfs2_file_fops;
 120 extern const struct file_operations gfs2_dir_fops;
 121
 122 static 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
 130 static 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