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  
gfs2_is_stuffed(const struct gfs2_inode * ip)20  static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
21  {
22  	return !ip->i_height;
23  }
24  
gfs2_is_jdata(const struct gfs2_inode * ip)25  static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
26  {
27  	return ip->i_diskflags & GFS2_DIF_JDATA;
28  }
29  
gfs2_is_ordered(const struct gfs2_sbd * sdp)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  
gfs2_is_writeback(const struct gfs2_sbd * sdp)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  
gfs2_is_dir(const struct gfs2_inode * ip)40  static inline int gfs2_is_dir(const struct gfs2_inode *ip)
41  {
42  	return S_ISDIR(ip->i_inode.i_mode);
43  }
44  
gfs2_set_inode_blocks(struct inode * inode,u64 blocks)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  
gfs2_get_inode_blocks(const struct inode * inode)50  static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
51  {
52  	return inode->i_blocks >> (inode->i_blkbits - 9);
53  }
54  
gfs2_add_inode_blocks(struct inode * inode,s64 change)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  
gfs2_check_inum(const struct gfs2_inode * ip,u64 no_addr,u64 no_formal_ino)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  
gfs2_inum_out(const struct gfs2_inode * ip,struct gfs2_dirent * dent)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  
gfs2_check_internal_file_size(struct inode * inode,u64 minsize,u64 maxsize)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  int gfs2_inode_refresh(struct gfs2_inode *ip);
97  
98  struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
99  			   int is_root);
100  int gfs2_permission(struct mnt_idmap *idmap,
101  		    struct inode *inode, int mask);
102  struct inode *gfs2_lookup_meta(struct inode *dip, const char *name);
103  void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
104  int gfs2_open_common(struct inode *inode, struct file *file);
105  loff_t gfs2_seek_data(struct file *file, loff_t offset);
106  loff_t gfs2_seek_hole(struct file *file, loff_t offset);
107  
108  extern const struct file_operations gfs2_file_fops_nolock;
109  extern const struct file_operations gfs2_dir_fops_nolock;
110  
111  int gfs2_fileattr_get(struct dentry *dentry, struct fileattr *fa);
112  int gfs2_fileattr_set(struct mnt_idmap *idmap,
113  		      struct dentry *dentry, struct fileattr *fa);
114  void gfs2_set_inode_flags(struct inode *inode);
115  
116  #ifdef CONFIG_GFS2_FS_LOCKING_DLM
117  extern const struct file_operations gfs2_file_fops;
118  extern const struct file_operations gfs2_dir_fops;
119  
gfs2_localflocks(const struct gfs2_sbd * sdp)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 */
125  #define gfs2_file_fops gfs2_file_fops_nolock
126  #define gfs2_dir_fops gfs2_dir_fops_nolock
127  
gfs2_localflocks(const struct gfs2_sbd * sdp)128  static 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  
136