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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 | 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 | ||
26 | static inline int gfs2_is_stuffed(const struct gfs2_inode *ip) | |
27 | { | |
28 | return !ip->i_height; | |
29 | } | |
30 | ||
31 | static inline int gfs2_is_jdata(const struct gfs2_inode *ip) | |
32 | { | |
33 | return ip->i_diskflags & GFS2_DIF_JDATA; | |
34 | } | |
35 | ||
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 | ||
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 | ||
48 | static inline int gfs2_is_dir(const struct gfs2_inode *ip) | |
49 | { | |
50 | return S_ISDIR(ip->i_inode.i_mode); | |
51 | } | |
52 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 |