fs/bcachefs/super-io.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_SUPER_IO_H
   3 #define _BCACHEFS_SUPER_IO_H
   4
   5 #include "extents.h"
   6 #include "eytzinger.h"
   7 #include "super_types.h"
   8 #include "super.h"
   9 #include "sb-members.h"
  10
  11 #include <asm/byteorder.h>
  12
  13 static inline bool bch2_version_compatible(u16 version)
  14 {
  15         return BCH_VERSION_MAJOR(version) <= BCH_VERSION_MAJOR(bcachefs_metadata_version_current) &&
  16                 version >= bcachefs_metadata_version_min;
  17 }
  18
  19 void bch2_version_to_text(struct printbuf *, unsigned);
  20 unsigned bch2_latest_compatible_version(unsigned);
  21
  22 static inline size_t bch2_sb_field_bytes(struct bch_sb_field *f)
  23 {
  24         return le32_to_cpu(f->u64s) * sizeof(u64);
  25 }
  26
  27 #define field_to_type(_f, _name)                                        \
  28         container_of_or_null(_f, struct bch_sb_field_##_name, field)
  29
  30 struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *, enum bch_sb_field_type);
  31 #define bch2_sb_field_get(_sb, _name)                                   \
  32         field_to_type(bch2_sb_field_get_id(_sb, BCH_SB_FIELD_##_name), _name)
  33
  34 struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *,
  35                                              enum bch_sb_field_type, unsigned);
  36 #define bch2_sb_field_resize(_sb, _name, _u64s)                         \
  37         field_to_type(bch2_sb_field_resize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)
  38
  39 struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *,
  40                                         enum bch_sb_field_type, unsigned);
  41 #define bch2_sb_field_get_minsize(_sb, _name, _u64s)                            \
  42         field_to_type(bch2_sb_field_get_minsize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)
  43
  44 #define bch2_sb_field_nr_entries(_f)                                    \
  45         (_f ? ((bch2_sb_field_bytes(&_f->field) - sizeof(*_f)) /        \
  46                sizeof(_f->entries[0]))                                  \
  47             : 0)
  48
  49 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
  50
  51 extern const char * const bch2_sb_fields[];
  52
  53 struct bch_sb_field_ops {
  54         int     (*validate)(struct bch_sb *, struct bch_sb_field *,
  55                             enum bch_validate_flags, struct printbuf *);
  56         void    (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
  57 };
  58
  59 static inline __le64 bch2_sb_magic(struct bch_fs *c)
  60 {
  61         __le64 ret;
  62
  63         memcpy(&ret, &c->sb.uuid, sizeof(ret));
  64         return ret;
  65 }
  66
  67 static inline __u64 jset_magic(struct bch_fs *c)
  68 {
  69         return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
  70 }
  71
  72 static inline __u64 bset_magic(struct bch_fs *c)
  73 {
  74         return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
  75 }
  76
  77 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
  78 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
  79
  80 void bch2_free_super(struct bch_sb_handle *);
  81 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
  82
  83 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
  84 int bch2_read_super_silent(const char *, struct bch_opts *, struct bch_sb_handle *);
  85 int bch2_write_super(struct bch_fs *);
  86 void __bch2_check_set_feature(struct bch_fs *, unsigned);
  87
  88 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
  89 {
  90         if (!(c->sb.features & (1ULL << feat)))
  91                 __bch2_check_set_feature(c, feat);
  92 }
  93
  94 bool bch2_check_version_downgrade(struct bch_fs *);
  95 void bch2_sb_upgrade(struct bch_fs *, unsigned);
  96
  97 void __bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
  98                              struct bch_sb_field *);
  99 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
 100                            struct bch_sb_field *);
 101 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
 102 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
 103
 104 #endif /* _BCACHEFS_SUPER_IO_H */