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 #ifdef pr_fmt
  14 #undef pr_fmt
  15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  16 #endif
  17
  18 #include <linux/mempool.h>
  19
  20 #include "incore.h"
  21
  22 #define fs_emerg(fs, fmt, ...)                                          \
  23         pr_emerg("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
  24 #define fs_warn(fs, fmt, ...)                                           \
  25         pr_warn("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
  26 #define fs_err(fs, fmt, ...)                                            \
  27         pr_err("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
  28 #define fs_info(fs, fmt, ...)                                           \
  29         pr_info("fsid=%s: " fmt, (fs)->sd_fsname, ##__VA_ARGS__)
  30
  31 void gfs2_assert_i(struct gfs2_sbd *sdp);
  32
  33 #define gfs2_assert(sdp, assertion) \
  34 do { \
  35         if (unlikely(!(assertion))) { \
  36                 gfs2_assert_i(sdp); \
  37                 BUG(); \
  38         } \
  39 } while (0)
  40
  41
  42 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
  43                            const char *function, char *file, unsigned int line);
  44
  45 #define gfs2_assert_withdraw(sdp, assertion) \
  46 ((likely(assertion)) ? 0 : gfs2_assert_withdraw_i((sdp), #assertion, \
  47                                         __func__, __FILE__, __LINE__))
  48
  49
  50 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
  51                        const char *function, char *file, unsigned int line);
  52
  53 #define gfs2_assert_warn(sdp, assertion) \
  54 ((likely(assertion)) ? 0 : gfs2_assert_warn_i((sdp), #assertion, \
  55                                         __func__, __FILE__, __LINE__))
  56
  57
  58 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide,
  59                    const char *function, char *file, unsigned int line);
  60
  61 #define gfs2_consist(sdp) \
  62 gfs2_consist_i((sdp), 0, __func__, __FILE__, __LINE__)
  63
  64
  65 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
  66                          const char *function, char *file, unsigned int line);
  67
  68 #define gfs2_consist_inode(ip) \
  69 gfs2_consist_inode_i((ip), 0, __func__, __FILE__, __LINE__)
  70
  71
  72 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
  73                          const char *function, char *file, unsigned int line);
  74
  75 #define gfs2_consist_rgrpd(rgd) \
  76 gfs2_consist_rgrpd_i((rgd), 0, __func__, __FILE__, __LINE__)
  77
  78
  79 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
  80                        const char *type, const char *function,
  81                        char *file, unsigned int line);
  82
  83 static inline int gfs2_meta_check(struct gfs2_sbd *sdp,
  84                                     struct buffer_head *bh)
  85 {
  86         struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
  87         u32 magic = be32_to_cpu(mh->mh_magic);
  88         if (unlikely(magic != GFS2_MAGIC)) {
  89                 fs_err(sdp, "Magic number missing at %llu\n",
  90                        (unsigned long long)bh->b_blocknr);
  91                 return -EIO;
  92         }
  93         return 0;
  94 }
  95
  96 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
  97                            u16 type, u16 t,
  98                            const char *function,
  99                            char *file, unsigned int line);
 100
 101 static inline int gfs2_metatype_check_i(struct gfs2_sbd *sdp,
 102                                         struct buffer_head *bh,
 103                                         u16 type,
 104                                         const char *function,
 105                                         char *file, unsigned int line)
 106 {
 107         struct gfs2_meta_header *mh = (struct gfs2_meta_header *)bh->b_data;
 108         u32 magic = be32_to_cpu(mh->mh_magic);
 109         u16 t = be32_to_cpu(mh->mh_type);
 110         if (unlikely(magic != GFS2_MAGIC))
 111                 return gfs2_meta_check_ii(sdp, bh, "magic number", function,
 112                                           file, line);
 113         if (unlikely(t != type))
 114                 return gfs2_metatype_check_ii(sdp, bh, type, t, function,
 115                                               file, line);
 116         return 0;
 117 }
 118
 119 #define gfs2_metatype_check(sdp, bh, type) \
 120 gfs2_metatype_check_i((sdp), (bh), (type), __func__, __FILE__, __LINE__)
 121
 122 static inline void gfs2_metatype_set(struct buffer_head *bh, u16 type,
 123                                      u16 format)
 124 {
 125         struct gfs2_meta_header *mh;
 126         mh = (struct gfs2_meta_header *)bh->b_data;
 127         mh->mh_type = cpu_to_be32(type);
 128         mh->mh_format = cpu_to_be32(format);
 129 }
 130
 131
 132 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function,
 133                     char *file, unsigned int line);
 134
 135 #define gfs2_io_error(sdp) \
 136 gfs2_io_error_i((sdp), __func__, __FILE__, __LINE__);
 137
 138
 139 void gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 140                         const char *function, char *file, unsigned int line,
 141                         bool withdraw);
 142
 143 #define gfs2_io_error_bh_wd(sdp, bh) \
 144 gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__, true);
 145
 146 #define gfs2_io_error_bh(sdp, bh) \
 147 gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__, false);
 148
 149
 150 extern struct kmem_cache *gfs2_glock_cachep;
 151 extern struct kmem_cache *gfs2_glock_aspace_cachep;
 152 extern struct kmem_cache *gfs2_inode_cachep;
 153 extern struct kmem_cache *gfs2_bufdata_cachep;
 154 extern struct kmem_cache *gfs2_rgrpd_cachep;
 155 extern struct kmem_cache *gfs2_quotad_cachep;
 156 extern struct kmem_cache *gfs2_qadata_cachep;
 157 extern mempool_t *gfs2_page_pool;
 158 extern struct workqueue_struct *gfs2_control_wq;
 159
 160 static inline unsigned int gfs2_tune_get_i(struct gfs2_tune *gt,
 161                                            unsigned int *p)
 162 {
 163         unsigned int x;
 164         spin_lock(&gt->gt_spin);
 165         x = *p;
 166         spin_unlock(&gt->gt_spin);
 167         return x;
 168 }
 169
 170 #define gfs2_tune_get(sdp, field) \
 171 gfs2_tune_get_i(&(sdp)->sd_tune, &(sdp)->sd_tune.field)
 172
 173 __printf(2, 3)
 174 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, const char *fmt, ...);
 175
 176 #endif /* __UTIL_DOT_H__ */