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192.168.1.100 / T106_DC / 5fc3725ebdd2bc3e86f07075410015a59f3c4c35 / . / ap / os / linux / linux-3.4.x / fs / gfs2 / inode.h
blob: 276e7b52b6585d8755b991d6ee745f9dd7d982df [file] [log] [blame]
lh9ed821d2023-04-07 01:36:19 -0700[diff] [blame]1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#ifndef __INODE_DOT_H__
11#define __INODE_DOT_H__
12
13#include <linux/fs.h>
14#include <linux/buffer_head.h>
15#include <linux/mm.h>
16#include "util.h"
17
18extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
19extern int gfs2_internal_read(struct gfs2_inode *ip,
20 struct file_ra_state *ra_state,
21 char *buf, loff_t *pos, unsigned size);
22extern void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,
23 unsigned int from, unsigned int to);
24extern void gfs2_set_aops(struct inode *inode);
25
26static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
27{
28 return !ip->i_height;
29}
30
31static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
32{
33 return ip->i_diskflags & GFS2_DIF_JDATA;
34}
35
36static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
37{
38 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
39 return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
40}
41
42static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
43{
44 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
45 return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
46}
47
48static inline int gfs2_is_dir(const struct gfs2_inode *ip)
49{
50 return S_ISDIR(ip->i_inode.i_mode);
51}
52
53static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
54{
55 inode->i_blocks = blocks <<
56 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
57}
58
59static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
60{
61 return inode->i_blocks >>
62 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
63}
64
65static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
66{
67 gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change));
68 change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
69 inode->i_blocks += change;
70}
71
72static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
73 u64 no_formal_ino)
74{
75 return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
76}
77
78static inline void gfs2_inum_out(const struct gfs2_inode *ip,
79 struct gfs2_dirent *dent)
80{
81 dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
82 dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
83}
84
85static inline int gfs2_check_internal_file_size(struct inode *inode,
86 u64 minsize, u64 maxsize)
87{
88 u64 size = i_size_read(inode);
89 if (size < minsize || size > maxsize)
90 goto err;
91 if (size & ((1 << inode->i_blkbits) - 1))
92 goto err;
93 return 0;
94err:
95 gfs2_consist_inode(GFS2_I(inode));
96 return -EIO;
97}
98
99extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
100 u64 no_addr, u64 no_formal_ino,
101 int non_block);
102extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
103 u64 *no_formal_ino,
104 unsigned int blktype);
105extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int nonblock);
106
107extern int gfs2_inode_refresh(struct gfs2_inode *ip);
108
109extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
110 int is_root);
111extern int gfs2_permission(struct inode *inode, int mask);
112extern int gfs2_setattr_simple(struct inode *inode, struct iattr *attr);
113extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
114extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
115
116extern const struct inode_operations gfs2_file_iops;
117extern const struct inode_operations gfs2_dir_iops;
118extern const struct inode_operations gfs2_symlink_iops;
119extern const struct file_operations gfs2_file_fops_nolock;
120extern const struct file_operations gfs2_dir_fops_nolock;
121
122extern void gfs2_set_inode_flags(struct inode *inode);
123
124#ifdef CONFIG_GFS2_FS_LOCKING_DLM
125extern const struct file_operations gfs2_file_fops;
126extern const struct file_operations gfs2_dir_fops;
127
128static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
129{
130 return sdp->sd_args.ar_localflocks;
131}
132#else /* Single node only */
133#define gfs2_file_fops gfs2_file_fops_nolock
134#define gfs2_dir_fops gfs2_dir_fops_nolock
135
136static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
137{
138 return 1;
139}
140#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
141
142#endif /* __INODE_DOT_H__ */
143