[GFS2] The core of GFS2
[linux-2.6.git] / fs / gfs2 / util.h
1 /*
2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3  * Copyright (C) 2004-2005 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 v.2.
8  */
9
10 #ifndef __UTIL_DOT_H__
11 #define __UTIL_DOT_H__
12
13 uint32_t gfs2_disk_hash(const char *data, int len);
14
15
16 #define fs_printk(level, fs, fmt, arg...) \
17         printk(level "GFS2: fsid=%s: " fmt , (fs)->sd_fsname , ## arg)
18
19 #define fs_info(fs, fmt, arg...) \
20         fs_printk(KERN_INFO , fs , fmt , ## arg)
21
22 #define fs_warn(fs, fmt, arg...) \
23         fs_printk(KERN_WARNING , fs , fmt , ## arg)
24
25 #define fs_err(fs, fmt, arg...) \
26         fs_printk(KERN_ERR, fs , fmt , ## arg)
27
28
29 void gfs2_assert_i(struct gfs2_sbd *sdp);
30
31 #define gfs2_assert(sdp, assertion) \
32 do { \
33         if (unlikely(!(assertion))) { \
34                 gfs2_assert_i(sdp); \
35                 BUG(); \
36         } \
37 } while (0)
38
39
40 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
41                            const char *function, char *file, unsigned int line);
42
43 #define gfs2_assert_withdraw(sdp, assertion) \
44 ((likely(assertion)) ? 0 : gfs2_assert_withdraw_i((sdp), #assertion, \
45                                         __FUNCTION__, __FILE__, __LINE__))
46
47
48 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
49                        const char *function, char *file, unsigned int line);
50
51 #define gfs2_assert_warn(sdp, assertion) \
52 ((likely(assertion)) ? 0 : gfs2_assert_warn_i((sdp), #assertion, \
53                                         __FUNCTION__, __FILE__, __LINE__))
54
55
56 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide,
57                    const char *function, char *file, unsigned int line);
58
59 #define gfs2_consist(sdp) \
60 gfs2_consist_i((sdp), 0, __FUNCTION__, __FILE__, __LINE__)
61
62
63 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
64                          const char *function, char *file, unsigned int line);
65
66 #define gfs2_consist_inode(ip) \
67 gfs2_consist_inode_i((ip), 0, __FUNCTION__, __FILE__, __LINE__)
68
69
70 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
71                          const char *function, char *file, unsigned int line);
72
73 #define gfs2_consist_rgrpd(rgd) \
74 gfs2_consist_rgrpd_i((rgd), 0, __FUNCTION__, __FILE__, __LINE__)
75
76
77 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
78                        const char *type, const char *function,
79                        char *file, unsigned int line);
80
81 static inline int gfs2_meta_check_i(struct gfs2_sbd *sdp,
82                                     struct buffer_head *bh,
83                                     const char *function,
84                                     char *file, unsigned int line)
85 {
86         struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
87         uint32_t magic = mh->mh_magic;
88         magic = be32_to_cpu(magic);
89         if (unlikely(magic != GFS2_MAGIC))
90                 return gfs2_meta_check_ii(sdp, bh, "magic number", function,
91                                           file, line);
92         return 0;
93 }
94
95 #define gfs2_meta_check(sdp, bh) \
96 gfs2_meta_check_i((sdp), (bh), __FUNCTION__, __FILE__, __LINE__)
97
98
99 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
100                            uint16_t type, uint16_t t,
101                            const char *function,
102                            char *file, unsigned int line);
103
104 static inline int gfs2_metatype_check_i(struct gfs2_sbd *sdp,
105                                         struct buffer_head *bh,
106                                         uint16_t type,
107                                         const char *function,
108                                         char *file, unsigned int line)
109 {
110         struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
111         uint32_t magic = mh->mh_magic;
112         uint16_t t = mh->mh_type;
113         magic = be32_to_cpu(magic);
114         if (unlikely(magic != GFS2_MAGIC))
115                 return gfs2_meta_check_ii(sdp, bh, "magic number", function,
116                                           file, line);
117         t = be16_to_cpu(t);
118         if (unlikely(t != type))
119                 return gfs2_metatype_check_ii(sdp, bh, type, t, function,
120                                               file, line);
121         return 0;
122 }
123
124 #define gfs2_metatype_check(sdp, bh, type) \
125 gfs2_metatype_check_i((sdp), (bh), (type), __FUNCTION__, __FILE__, __LINE__)
126
127 static inline void gfs2_metatype_set(struct buffer_head *bh, uint16_t type,
128                                      uint16_t format)
129 {
130         struct gfs2_meta_header *mh;
131         mh = (struct gfs2_meta_header *)bh->b_data;
132         mh->mh_type = cpu_to_be16(type);
133         mh->mh_format = cpu_to_be16(format);
134 }
135
136
137 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function,
138                     char *file, unsigned int line);
139
140 #define gfs2_io_error(sdp) \
141 gfs2_io_error_i((sdp), __FUNCTION__, __FILE__, __LINE__);
142
143
144 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
145                        const char *function, char *file, unsigned int line);
146
147 #define gfs2_io_error_bh(sdp, bh) \
148 gfs2_io_error_bh_i((sdp), (bh), __FUNCTION__, __FILE__, __LINE__);
149
150
151 extern kmem_cache_t *gfs2_glock_cachep;
152 extern kmem_cache_t *gfs2_inode_cachep;
153 extern kmem_cache_t *gfs2_bufdata_cachep;
154
155 struct gfs2_user_buffer {
156         char __user *ub_data;
157         unsigned int ub_size;
158         unsigned int ub_count;
159 };
160
161 int gfs2_add_bh_to_ub(struct gfs2_user_buffer *ub, struct buffer_head *bh);
162
163 static inline unsigned int gfs2_tune_get_i(struct gfs2_tune *gt,
164                                            unsigned int *p)
165 {
166         unsigned int x;
167         spin_lock(&gt->gt_spin);
168         x = *p;
169         spin_unlock(&gt->gt_spin);
170         return x;
171 }
172
173 #define gfs2_tune_get(sdp, field) \
174 gfs2_tune_get_i(&(sdp)->sd_tune, &(sdp)->sd_tune.field)
175
176 void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
177                       unsigned int bit, int new_value);
178
179 #endif /* __UTIL_DOT_H__ */
180