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
18 extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
19 extern int gfs2_internal_read(struct gfs2_inode *ip,
20 struct file_ra_state *ra_state,
21 char *buf, loff_t *pos, unsigned size);
22 extern void gfs2_set_aops(struct inode *inode);
23
24 static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
25 {
26 return !ip->i_height;
27 }
28
29 static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
30 {
31 return ip->i_diskflags & GFS2_DIF_JDATA;
32 }
33
34 static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
35 {
36 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
37 return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
38 }
39
40 static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
41 {
42 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
43 return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
44 }
45
46 static inline int gfs2_is_dir(const struct gfs2_inode *ip)
47 {
48 return S_ISDIR(ip->i_inode.i_mode);
49 }
50
51 static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
52 {
53 inode->i_blocks = blocks <<
54 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
55 }
56
57 static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
58 {
59 return inode->i_blocks >>
60 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
61 }
62
63 static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
64 {
65 gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change));
66 change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
67 inode->i_blocks += change;
68 }
69
70 static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
71 u64 no_formal_ino)
72 {
73 return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
74 }
75
76 static inline void gfs2_inum_out(const struct gfs2_inode *ip,
77 struct gfs2_dirent *dent)
78 {
79 dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
80 dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
81 }
82
83
84 extern void gfs2_set_iop(struct inode *inode);
85 extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
86 u64 no_addr, u64 no_formal_ino,
87 int skip_freeing);
88 extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
89
90 extern int gfs2_inode_refresh(struct gfs2_inode *ip);
91
92 extern int gfs2_dinode_dealloc(struct gfs2_inode *inode);
93 extern int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
94 extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
95 int is_root);
96 extern struct inode *gfs2_createi(struct gfs2_holder *ghs,
97 const struct qstr *name,
98 unsigned int mode, dev_t dev);
99 extern int gfs2_permission(struct inode *inode, int mask);
100 extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
101 extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
102 extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
103 extern void gfs2_dinode_print(const struct gfs2_inode *ip);
104
105 extern const struct inode_operations gfs2_file_iops;
106 extern const struct inode_operations gfs2_dir_iops;
107 extern const struct inode_operations gfs2_symlink_iops;
108 extern const struct file_operations gfs2_file_fops_nolock;
109 extern const struct file_operations gfs2_dir_fops_nolock;
110
111 extern void gfs2_set_inode_flags(struct inode *inode);
112
113 #ifdef CONFIG_GFS2_FS_LOCKING_DLM
114 extern const struct file_operations gfs2_file_fops;
115 extern const struct file_operations gfs2_dir_fops;
116
117 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
118 {
119 return sdp->sd_args.ar_localflocks;
120 }
121 #else /* Single node only */
122 #define gfs2_file_fops gfs2_file_fops_nolock
123 #define gfs2_dir_fops gfs2_dir_fops_nolock
124
125 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
126 {
127 return 1;
128 }
129 #endif /* CONFIG_GFS2_FS_LOCKING_DLM */
130
131 #endif /* __INODE_DOT_H__ */
132
133
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