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 bool gfs2_release_folio(struct folio *folio, gfp_t gfp_mask);
  16 ssize_t gfs2_internal_read(struct gfs2_inode *ip,
  17                            char *buf, loff_t *pos, size_t size);
  18 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 << (inode->i_blkbits - 9);
  48 }
  49
  50 static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
  51 {
  52         return inode->i_blocks >> (inode->i_blkbits - 9);
  53 }
  54
  55 static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
  56 {
  57         change <<= inode->i_blkbits - 9;
  58         gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks >= -change));
  59         inode->i_blocks += change;
  60 }
  61
  62 static 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
  68 static 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
  75 static 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;
  84 err:
  85         gfs2_consist_inode(GFS2_I(inode));
  86         return -EIO;
  87 }
  88
  89 struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
  90                                 u64 no_addr, u64 no_formal_ino,
  91                                 unsigned int blktype);
  92 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
  93                                   u64 no_formal_ino,
  94                                   unsigned int blktype);
  95
  96 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
  97                            int is_root);
  98 int gfs2_permission(struct mnt_idmap *idmap,
  99                     struct inode *inode, int mask);
 100 struct inode *gfs2_lookup_meta(struct inode *dip, const char *name);
 101 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
 102 int gfs2_open_common(struct inode *inode, struct file *file);
 103 loff_t gfs2_seek_data(struct file *file, loff_t offset);
 104 loff_t gfs2_seek_hole(struct file *file, loff_t offset);
 105
 106 extern const struct file_operations gfs2_file_fops_nolock;
 107 extern const struct file_operations gfs2_dir_fops_nolock;
 108
 109 int gfs2_fileattr_get(struct dentry *dentry, struct fileattr *fa);
 110 int gfs2_fileattr_set(struct mnt_idmap *idmap,
 111                       struct dentry *dentry, struct fileattr *fa);
 112 void gfs2_set_inode_flags(struct inode *inode);
 113
 114 #ifdef CONFIG_GFS2_FS_LOCKING_DLM
 115 extern const struct file_operations gfs2_file_fops;
 116 extern const struct file_operations gfs2_dir_fops;
 117
 118 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
 119 {
 120         return sdp->sd_args.ar_localflocks;
 121 }
 122 #else /* Single node only */
 123 #define gfs2_file_fops gfs2_file_fops_nolock
 124 #define gfs2_dir_fops gfs2_dir_fops_nolock
 125
 126 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
 127 {
 128         return 1;
 129 }
 130 #endif /* CONFIG_GFS2_FS_LOCKING_DLM */
 131
 132 #endif /* __INODE_DOT_H__ */
 133