fs/bcachefs/error.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_ERROR_H
   3 #define _BCACHEFS_ERROR_H
   4
   5 #include <linux/list.h>
   6 #include <linux/printk.h>
   7 #include "bkey_types.h"
   8 #include "sb-errors.h"
   9
  10 struct bch_dev;
  11 struct bch_fs;
  12 struct work_struct;
  13
  14 /*
  15  * XXX: separate out errors that indicate on disk data is inconsistent, and flag
  16  * superblock as such
  17  */
  18
  19 /* Error messages: */
  20
  21 /*
  22  * Inconsistency errors: The on disk data is inconsistent. If these occur during
  23  * initial recovery, they don't indicate a bug in the running code - we walk all
  24  * the metadata before modifying anything. If they occur at runtime, they
  25  * indicate either a bug in the running code or (less likely) data is being
  26  * silently corrupted under us.
  27  *
  28  * XXX: audit all inconsistent errors and make sure they're all recoverable, in
  29  * BCH_ON_ERROR_CONTINUE mode
  30  */
  31
  32 bool bch2_inconsistent_error(struct bch_fs *);
  33
  34 int bch2_topology_error(struct bch_fs *);
  35
  36 #define bch2_fs_topology_error(c, ...)                                  \
  37 ({                                                                      \
  38         bch_err(c, "btree topology error: " __VA_ARGS__);               \
  39         bch2_topology_error(c);                                         \
  40 })
  41
  42 #define bch2_fs_inconsistent(c, ...)                                    \
  43 ({                                                                      \
  44         bch_err(c, __VA_ARGS__);                                        \
  45         bch2_inconsistent_error(c);                                     \
  46 })
  47
  48 #define bch2_fs_inconsistent_on(cond, c, ...)                           \
  49 ({                                                                      \
  50         bool _ret = unlikely(!!(cond));                                 \
  51                                                                         \
  52         if (_ret)                                                       \
  53                 bch2_fs_inconsistent(c, __VA_ARGS__);                   \
  54         _ret;                                                           \
  55 })
  56
  57 /*
  58  * Later we might want to mark only the particular device inconsistent, not the
  59  * entire filesystem:
  60  */
  61
  62 #define bch2_dev_inconsistent(ca, ...)                                  \
  63 do {                                                                    \
  64         bch_err(ca, __VA_ARGS__);                                       \
  65         bch2_inconsistent_error((ca)->fs);                              \
  66 } while (0)
  67
  68 #define bch2_dev_inconsistent_on(cond, ca, ...)                         \
  69 ({                                                                      \
  70         bool _ret = unlikely(!!(cond));                                 \
  71                                                                         \
  72         if (_ret)                                                       \
  73                 bch2_dev_inconsistent(ca, __VA_ARGS__);                 \
  74         _ret;                                                           \
  75 })
  76
  77 /*
  78  * When a transaction update discovers or is causing a fs inconsistency, it's
  79  * helpful to also dump the pending updates:
  80  */
  81 #define bch2_trans_inconsistent(trans, ...)                             \
  82 ({                                                                      \
  83         bch_err(trans->c, __VA_ARGS__);                                 \
  84         bch2_dump_trans_updates(trans);                                 \
  85         bch2_inconsistent_error(trans->c);                              \
  86 })
  87
  88 #define bch2_trans_inconsistent_on(cond, trans, ...)                    \
  89 ({                                                                      \
  90         bool _ret = unlikely(!!(cond));                                 \
  91                                                                         \
  92         if (_ret)                                                       \
  93                 bch2_trans_inconsistent(trans, __VA_ARGS__);            \
  94         _ret;                                                           \
  95 })
  96
  97 /*
  98  * Fsck errors: inconsistency errors we detect at mount time, and should ideally
  99  * be able to repair:
 100  */
 101
 102 struct fsck_err_state {
 103         struct list_head        list;
 104         const char              *fmt;
 105         u64                     nr;
 106         bool                    ratelimited;
 107         int                     ret;
 108         int                     fix;
 109         char                    *last_msg;
 110 };
 111
 112 #define fsck_err_count(_c, _err)        bch2_sb_err_count(_c, BCH_FSCK_ERR_##_err)
 113
 114 __printf(5, 6) __cold
 115 int __bch2_fsck_err(struct bch_fs *, struct btree_trans *,
 116                   enum bch_fsck_flags,
 117                   enum bch_sb_error_id,
 118                   const char *, ...);
 119 #define bch2_fsck_err(c, _flags, _err_type, ...)                                \
 120         __bch2_fsck_err(type_is(c, struct bch_fs *) ? (struct bch_fs *) c : NULL,\
 121                         type_is(c, struct btree_trans *) ? (struct btree_trans *) c : NULL,\
 122                         _flags, BCH_FSCK_ERR_##_err_type, __VA_ARGS__)
 123
 124 void bch2_flush_fsck_errs(struct bch_fs *);
 125
 126 #define __fsck_err(c, _flags, _err_type, ...)                           \
 127 ({                                                                      \
 128         int _ret = bch2_fsck_err(c, _flags, _err_type, __VA_ARGS__);    \
 129         if (_ret != -BCH_ERR_fsck_fix &&                                \
 130             _ret != -BCH_ERR_fsck_ignore) {                             \
 131                 ret = _ret;                                             \
 132                 goto fsck_err;                                          \
 133         }                                                               \
 134                                                                         \
 135         _ret == -BCH_ERR_fsck_fix;                                      \
 136 })
 137
 138 /* These macros return true if error should be fixed: */
 139
 140 /* XXX: mark in superblock that filesystem contains errors, if we ignore: */
 141
 142 #define __fsck_err_on(cond, c, _flags, _err_type, ...)                  \
 143 ({                                                                      \
 144         might_sleep();                                                  \
 145                                                                         \
 146         if (type_is(c, struct bch_fs *))                                \
 147                 WARN_ON(bch2_current_has_btree_trans((struct bch_fs *) c));\
 148                                                                         \
 149         (unlikely(cond) ? __fsck_err(c, _flags, _err_type, __VA_ARGS__) : false);\
 150 })
 151
 152 #define need_fsck_err_on(cond, c, _err_type, ...)                               \
 153         __fsck_err_on(cond, c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, _err_type, __VA_ARGS__)
 154
 155 #define need_fsck_err(c, _err_type, ...)                                \
 156         __fsck_err(c, FSCK_CAN_IGNORE|FSCK_NEED_FSCK, _err_type, __VA_ARGS__)
 157
 158 #define mustfix_fsck_err(c, _err_type, ...)                             \
 159         __fsck_err(c, FSCK_CAN_FIX, _err_type, __VA_ARGS__)
 160
 161 #define mustfix_fsck_err_on(cond, c, _err_type, ...)                    \
 162         __fsck_err_on(cond, c, FSCK_CAN_FIX, _err_type, __VA_ARGS__)
 163
 164 #define fsck_err(c, _err_type, ...)                                     \
 165         __fsck_err(c, FSCK_CAN_FIX|FSCK_CAN_IGNORE, _err_type, __VA_ARGS__)
 166
 167 #define fsck_err_on(cond, c, _err_type, ...)                            \
 168         __fsck_err_on(cond, c, FSCK_CAN_FIX|FSCK_CAN_IGNORE, _err_type, __VA_ARGS__)
 169
 170 __printf(5, 6)
 171 int __bch2_bkey_fsck_err(struct bch_fs *,
 172                          struct bkey_s_c,
 173                          enum bch_fsck_flags,
 174                          enum bch_sb_error_id,
 175                          const char *, ...);
 176
 177 /*
 178  * for now, bkey fsck errors are always handled by deleting the entire key -
 179  * this will change at some point
 180  */
 181 #define bkey_fsck_err(c, _err_type, _err_msg, ...)                      \
 182 do {                                                                    \
 183         if ((flags & BCH_VALIDATE_silent)) {                            \
 184                 ret = -BCH_ERR_fsck_delete_bkey;                        \
 185                 goto fsck_err;                                          \
 186         }                                                               \
 187         int _ret = __bch2_bkey_fsck_err(c, k, FSCK_CAN_FIX,             \
 188                                 BCH_FSCK_ERR_##_err_type,               \
 189                                 _err_msg, ##__VA_ARGS__);               \
 190         if (_ret != -BCH_ERR_fsck_fix &&                                \
 191             _ret != -BCH_ERR_fsck_ignore)                               \
 192                 ret = _ret;                                             \
 193         ret = -BCH_ERR_fsck_delete_bkey;                                \
 194         goto fsck_err;                                                  \
 195 } while (0)
 196
 197 #define bkey_fsck_err_on(cond, ...)                                     \
 198 do {                                                                    \
 199         if (unlikely(cond))                                             \
 200                 bkey_fsck_err(__VA_ARGS__);                             \
 201 } while (0)
 202
 203 /*
 204  * Fatal errors: these don't indicate a bug, but we can't continue running in RW
 205  * mode - pretty much just due to metadata IO errors:
 206  */
 207
 208 void bch2_fatal_error(struct bch_fs *);
 209
 210 #define bch2_fs_fatal_error(c, _msg, ...)                               \
 211 do {                                                                    \
 212         bch_err(c, "%s(): fatal error " _msg, __func__, ##__VA_ARGS__); \
 213         bch2_fatal_error(c);                                            \
 214 } while (0)
 215
 216 #define bch2_fs_fatal_err_on(cond, c, ...)                              \
 217 ({                                                                      \
 218         bool _ret = unlikely(!!(cond));                                 \
 219                                                                         \
 220         if (_ret)                                                       \
 221                 bch2_fs_fatal_error(c, __VA_ARGS__);                    \
 222         _ret;                                                           \
 223 })
 224
 225 /*
 226  * IO errors: either recoverable metadata IO (because we have replicas), or data
 227  * IO - we need to log it and print out a message, but we don't (necessarily)
 228  * want to shut down the fs:
 229  */
 230
 231 void bch2_io_error_work(struct work_struct *);
 232
 233 /* Does the error handling without logging a message */
 234 void bch2_io_error(struct bch_dev *, enum bch_member_error_type);
 235
 236 #define bch2_dev_io_err_on(cond, ca, _type, ...)                        \
 237 ({                                                                      \
 238         bool _ret = (cond);                                             \
 239                                                                         \
 240         if (_ret) {                                                     \
 241                 bch_err_dev_ratelimited(ca, __VA_ARGS__);               \
 242                 bch2_io_error(ca, _type);                               \
 243         }                                                               \
 244         _ret;                                                           \
 245 })
 246
 247 #define bch2_dev_inum_io_err_on(cond, ca, _type, ...)                   \
 248 ({                                                                      \
 249         bool _ret = (cond);                                             \
 250                                                                         \
 251         if (_ret) {                                                     \
 252                 bch_err_inum_offset_ratelimited(ca, __VA_ARGS__);       \
 253                 bch2_io_error(ca, _type);                               \
 254         }                                                               \
 255         _ret;                                                           \
 256 })
 257
 258 #endif /* _BCACHEFS_ERROR_H */