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 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
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
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
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.