Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 char *buf, loff_t *pos, unsigned size);
21extern void gfs2_set_aops(struct inode *inode);
22
23static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
24{
25 return !ip->i_height;
26}
27
28static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
29{
30 return ip->i_diskflags & GFS2_DIF_JDATA;
31}
32
33static inline bool gfs2_is_ordered(const struct gfs2_sbd *sdp)
34{
35 return sdp->sd_args.ar_data == GFS2_DATA_ORDERED;
36}
37
38static inline bool gfs2_is_writeback(const struct gfs2_sbd *sdp)
39{
40 return sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK;
41}
42
43static inline int gfs2_is_dir(const struct gfs2_inode *ip)
44{
45 return S_ISDIR(ip->i_inode.i_mode);
46}
47
48static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
49{
50 inode->i_blocks = blocks <<
51 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
52}
53
54static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
55{
56 return inode->i_blocks >>
57 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
58}
59
60static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
61{
62 change <<= inode->i_blkbits - GFS2_BASIC_BLOCK_SHIFT;
63 gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks >= -change));
64 inode->i_blocks += change;
65}
66
67static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
68 u64 no_formal_ino)
69{
70 return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
71}
72
73static inline void gfs2_inum_out(const struct gfs2_inode *ip,
74 struct gfs2_dirent *dent)
75{
76 dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
77 dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
78}
79
80static inline int gfs2_check_internal_file_size(struct inode *inode,
81 u64 minsize, u64 maxsize)
82{
83 u64 size = i_size_read(inode);
84 if (size < minsize || size > maxsize)
85 goto err;
86 if (size & (BIT(inode->i_blkbits) - 1))
87 goto err;
88 return 0;
89err:
90 gfs2_consist_inode(GFS2_I(inode));
91 return -EIO;
92}
93
94extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
95 u64 no_addr, u64 no_formal_ino,
96 unsigned int blktype);
97extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
98 u64 *no_formal_ino,
99 unsigned int blktype);
100
101extern int gfs2_inode_refresh(struct gfs2_inode *ip);
102
103extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
104 int is_root);
105extern int gfs2_permission(struct inode *inode, int mask);
106extern int gfs2_setattr_simple(struct inode *inode, struct iattr *attr);
107extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
108extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
109extern int gfs2_open_common(struct inode *inode, struct file *file);
110extern loff_t gfs2_seek_data(struct file *file, loff_t offset);
111extern loff_t gfs2_seek_hole(struct file *file, loff_t offset);
112
113extern const struct inode_operations gfs2_file_iops;
114extern const struct inode_operations gfs2_dir_iops;
115extern const struct inode_operations gfs2_symlink_iops;
116extern const struct file_operations gfs2_file_fops_nolock;
117extern const struct file_operations gfs2_dir_fops_nolock;
118
119extern void gfs2_set_inode_flags(struct inode *inode);
120
121#ifdef CONFIG_GFS2_FS_LOCKING_DLM
122extern const struct file_operations gfs2_file_fops;
123extern const struct file_operations gfs2_dir_fops;
124
125static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
126{
127 return sdp->sd_args.ar_localflocks;
128}
129#else /* Single node only */
130#define gfs2_file_fops gfs2_file_fops_nolock
131#define gfs2_dir_fops gfs2_dir_fops_nolock
132
133static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
134{
135 return 1;
136}
137#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
138
139#endif /* __INODE_DOT_H__ */
140