add hlist_bl_lock/unlock helpers
[linux-2.6.git] / fs / gfs2 / util.h
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 __UTIL_DOT_H__
11 #define __UTIL_DOT_H__
12
13 #include "incore.h"
14
15 #define fs_printk(level, fs, fmt, arg...) \
16         printk(level "GFS2: fsid=%s: " fmt , (fs)->sd_fsname , ## arg)
17
18 #define fs_info(fs, fmt, arg...) \
19         fs_printk(KERN_INFO , fs , fmt , ## arg)
20
21 #define fs_warn(fs, fmt, arg...) \
22         fs_printk(KERN_WARNING , fs , fmt , ## arg)
23
24 #define fs_err(fs, fmt, arg...) \
25         fs_printk(KERN_ERR, fs , fmt , ## arg)
26
27
28 void gfs2_assert_i(struct gfs2_sbd *sdp);
29
30 #define gfs2_assert(sdp, assertion) \
31 do { \
32         if (unlikely(!(assertion))) { \
33                 gfs2_assert_i(sdp); \
34                 BUG(); \
35         } \
36 } while (0)
37
38
39 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
40                            const char *function, char *file, unsigned int line);
41
42 #define gfs2_assert_withdraw(sdp, assertion) \
43 ((likely(assertion)) ? 0 : gfs2_assert_withdraw_i((sdp), #assertion, \
44                                         __func__, __FILE__, __LINE__))
45
46
47 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
48                        const char *function, char *file, unsigned int line);
49
50 #define gfs2_assert_warn(sdp, assertion) \
51 ((likely(assertion)) ? 0 : gfs2_assert_warn_i((sdp), #assertion, \
52                                         __func__, __FILE__, __LINE__))
53
54
55 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide,
56                    const char *function, char *file, unsigned int line);
57
58 #define gfs2_consist(sdp) \
59 gfs2_consist_i((sdp), 0, __func__, __FILE__, __LINE__)
60
61
62 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
63                          const char *function, char *file, unsigned int line);
64
65 #define gfs2_consist_inode(ip) \
66 gfs2_consist_inode_i((ip), 0, __func__, __FILE__, __LINE__)
67
68
69 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
70                          const char *function, char *file, unsigned int line);
71
72 #define gfs2_consist_rgrpd(rgd) \
73 gfs2_consist_rgrpd_i((rgd), 0, __func__, __FILE__, __LINE__)
74
75
76 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
77                        const char *type, const char *function,
78                        char *file, unsigned int line);
79
80 static inline int gfs2_meta_check_i(struct gfs2_sbd *sdp,
81                                     struct buffer_head *bh,
82                                     const char *function,
83                                     char *file, unsigned int line)
84 {
85         struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
86         u32 magic = be32_to_cpu(mh->mh_magic);
87         if (unlikely(magic != GFS2_MAGIC))
88                 return gfs2_meta_check_ii(sdp, bh, "magic number", function,
89                                           file, line);
90         return 0;
91 }
92
93 #define gfs2_meta_check(sdp, bh) \
94 gfs2_meta_check_i((sdp), (bh), __func__, __FILE__, __LINE__)
95
96
97 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
98                            u16 type, u16 t,
99                            const char *function,
100                            char *file, unsigned int line);
101
102 static inline int gfs2_metatype_check_i(struct gfs2_sbd *sdp,
103                                         struct buffer_head *bh,
104                                         u16 type,
105                                         const char *function,
106                                         char *file, unsigned int line)
107 {
108         struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
109         u32 magic = be32_to_cpu(mh->mh_magic);
110         u16 t = be32_to_cpu(mh->mh_type);
111         if (unlikely(magic != GFS2_MAGIC))
112                 return gfs2_meta_check_ii(sdp, bh, "magic number", function,
113                                           file, line);
114         if (unlikely(t != type))
115                 return gfs2_metatype_check_ii(sdp, bh, type, t, function,
116                                               file, line);
117         return 0;
118 }
119
120 #define gfs2_metatype_check(sdp, bh, type) \
121 gfs2_metatype_check_i((sdp), (bh), (type), __func__, __FILE__, __LINE__)
122
123 static inline void gfs2_metatype_set(struct buffer_head *bh, u16 type,
124                                      u16 format)
125 {
126         struct gfs2_meta_header *mh;
127         mh = (struct gfs2_meta_header *)bh->b_data;
128         mh->mh_type = cpu_to_be32(type);
129         mh->mh_format = cpu_to_be32(format);
130 }
131
132
133 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function,
134                     char *file, unsigned int line);
135
136 #define gfs2_io_error(sdp) \
137 gfs2_io_error_i((sdp), __func__, __FILE__, __LINE__);
138
139
140 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
141                        const char *function, char *file, unsigned int line);
142
143 #define gfs2_io_error_bh(sdp, bh) \
144 gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__);
145
146
147 extern struct kmem_cache *gfs2_glock_cachep;
148 extern struct kmem_cache *gfs2_glock_aspace_cachep;
149 extern struct kmem_cache *gfs2_inode_cachep;
150 extern struct kmem_cache *gfs2_bufdata_cachep;
151 extern struct kmem_cache *gfs2_rgrpd_cachep;
152 extern struct kmem_cache *gfs2_quotad_cachep;
153
154 static inline unsigned int gfs2_tune_get_i(struct gfs2_tune *gt,
155                                            unsigned int *p)
156 {
157         unsigned int x;
158         spin_lock(&gt->gt_spin);
159         x = *p;
160         spin_unlock(&gt->gt_spin);
161         return x;
162 }
163
164 #define gfs2_tune_get(sdp, field) \
165 gfs2_tune_get_i(&(sdp)->sd_tune, &(sdp)->sd_tune.field)
166
167 void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
168                       unsigned int bit, int new_value);
169 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...);
170
171 #endif /* __UTIL_DOT_H__ */
172