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_page_add_databufs(struct gfs2_inode *ip, struct page *page,
23 unsigned int from, unsigned int to);
24 extern void gfs2_set_aops(struct inode *inode);
25
gfs2_is_stuffed(const struct gfs2_inode * ip)26 static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
27 {
28 return !ip->i_height;
29 }
30
gfs2_is_jdata(const struct gfs2_inode * ip)31 static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
32 {
33 return ip->i_diskflags & GFS2_DIF_JDATA;
34 }
35
gfs2_is_writeback(const struct gfs2_inode * ip)36 static 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
gfs2_is_ordered(const struct gfs2_inode * ip)42 static 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
gfs2_is_dir(const struct gfs2_inode * ip)48 static inline int gfs2_is_dir(const struct gfs2_inode *ip)
49 {
50 return S_ISDIR(ip->i_inode.i_mode);
51 }
52
gfs2_set_inode_blocks(struct inode * inode,u64 blocks)53 static 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
gfs2_get_inode_blocks(const struct inode * inode)59 static 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
gfs2_add_inode_blocks(struct inode * inode,s64 change)65 static 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
gfs2_check_inum(const struct gfs2_inode * ip,u64 no_addr,u64 no_formal_ino)72 static 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
gfs2_inum_out(const struct gfs2_inode * ip,struct gfs2_dirent * dent)78 static 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
gfs2_check_internal_file_size(struct inode * inode,u64 minsize,u64 maxsize)85 static 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;
94 err:
95 gfs2_consist_inode(GFS2_I(inode));
96 return -EIO;
97 }
98
99 extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
100 u64 no_addr, u64 no_formal_ino,
101 int non_block);
102 extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
103 u64 *no_formal_ino,
104 unsigned int blktype);
105 extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
106
107 extern int gfs2_inode_refresh(struct gfs2_inode *ip);
108
109 extern int gfs2_dinode_dealloc(struct gfs2_inode *inode);
110 extern int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
111 extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
112 int is_root);
113 extern struct inode *gfs2_createi(struct gfs2_holder *ghs,
114 const struct qstr *name,
115 unsigned int mode, dev_t dev);
116 extern int gfs2_permission(struct inode *inode, int mask, unsigned int flags);
117 extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
118 extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
119 extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
120 extern void gfs2_dinode_print(const struct gfs2_inode *ip);
121
122 extern const struct inode_operations gfs2_file_iops;
123 extern const struct inode_operations gfs2_dir_iops;
124 extern const struct inode_operations gfs2_symlink_iops;
125 extern const struct file_operations gfs2_file_fops_nolock;
126 extern const struct file_operations gfs2_dir_fops_nolock;
127
128 extern void gfs2_set_inode_flags(struct inode *inode);
129
130 #ifdef CONFIG_GFS2_FS_LOCKING_DLM
131 extern const struct file_operations gfs2_file_fops;
132 extern const struct file_operations gfs2_dir_fops;
133
gfs2_localflocks(const struct gfs2_sbd * sdp)134 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
135 {
136 return sdp->sd_args.ar_localflocks;
137 }
138 #else /* Single node only */
139 #define gfs2_file_fops gfs2_file_fops_nolock
140 #define gfs2_dir_fops gfs2_dir_fops_nolock
141
gfs2_localflocks(const struct gfs2_sbd * sdp)142 static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
143 {
144 return 1;
145 }
146 #endif /* CONFIG_GFS2_FS_LOCKING_DLM */
147
148 #endif /* __INODE_DOT_H__ */
149
150