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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 | char *buf, loff_t *pos, unsigned size); | |
21 | extern void gfs2_set_aops(struct inode *inode); | |
22 | ||
23 | static inline int gfs2_is_stuffed(const struct gfs2_inode *ip) | |
24 | { | |
25 | return !ip->i_height; | |
26 | } | |
27 | ||
28 | static inline int gfs2_is_jdata(const struct gfs2_inode *ip) | |
29 | { | |
30 | return ip->i_diskflags & GFS2_DIF_JDATA; | |
31 | } | |
32 | ||
33 | static inline int gfs2_is_writeback(const struct gfs2_inode *ip) | |
34 | { | |
35 | const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
36 | return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip); | |
37 | } | |
38 | ||
39 | static inline int gfs2_is_ordered(const struct gfs2_inode *ip) | |
40 | { | |
41 | const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
42 | return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip); | |
43 | } | |
44 | ||
45 | static inline int gfs2_is_dir(const struct gfs2_inode *ip) | |
46 | { | |
47 | return S_ISDIR(ip->i_inode.i_mode); | |
48 | } | |
49 | ||
50 | static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks) | |
51 | { | |
52 | inode->i_blocks = blocks << | |
53 | (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); | |
54 | } | |
55 | ||
56 | static inline u64 gfs2_get_inode_blocks(const struct inode *inode) | |
57 | { | |
58 | return inode->i_blocks >> | |
59 | (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); | |
60 | } | |
61 | ||
62 | static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change) | |
63 | { | |
64 | gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change)); | |
65 | change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK); | |
66 | inode->i_blocks += change; | |
67 | } | |
68 | ||
69 | static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr, | |
70 | u64 no_formal_ino) | |
71 | { | |
72 | return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino; | |
73 | } | |
74 | ||
75 | static inline void gfs2_inum_out(const struct gfs2_inode *ip, | |
76 | struct gfs2_dirent *dent) | |
77 | { | |
78 | dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); | |
79 | dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr); | |
80 | } | |
81 | ||
82 | static inline int gfs2_check_internal_file_size(struct inode *inode, | |
83 | u64 minsize, u64 maxsize) | |
84 | { | |
85 | u64 size = i_size_read(inode); | |
86 | if (size < minsize || size > maxsize) | |
87 | goto err; | |
88 | if (size & (BIT(inode->i_blkbits) - 1)) | |
89 | goto err; | |
90 | return 0; | |
91 | err: | |
92 | gfs2_consist_inode(GFS2_I(inode)); | |
93 | return -EIO; | |
94 | } | |
95 | ||
96 | extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, | |
97 | u64 no_addr, u64 no_formal_ino, | |
98 | unsigned int blktype); | |
99 | extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, | |
100 | u64 *no_formal_ino, | |
101 | unsigned int blktype); | |
102 | ||
103 | extern int gfs2_inode_refresh(struct gfs2_inode *ip); | |
104 | ||
105 | extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, | |
106 | int is_root); | |
107 | extern int gfs2_permission(struct inode *inode, int mask); | |
108 | extern int gfs2_setattr_simple(struct inode *inode, struct iattr *attr); | |
109 | extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name); | |
110 | extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf); | |
111 | extern int gfs2_open_common(struct inode *inode, struct file *file); | |
112 | ||
113 | extern const struct inode_operations gfs2_file_iops; | |
114 | extern const struct inode_operations gfs2_dir_iops; | |
115 | extern const struct inode_operations gfs2_symlink_iops; | |
116 | extern const struct file_operations gfs2_file_fops_nolock; | |
117 | extern const struct file_operations gfs2_dir_fops_nolock; | |
118 | ||
119 | extern void gfs2_set_inode_flags(struct inode *inode); | |
120 | ||
121 | #ifdef CONFIG_GFS2_FS_LOCKING_DLM | |
122 | extern const struct file_operations gfs2_file_fops; | |
123 | extern const struct file_operations gfs2_dir_fops; | |
124 | ||
125 | static 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 | ||
133 | static 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 |