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