git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/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
  10 #include <asm/byteorder.h>
  11
  12 static inline bool bch2_version_compatible(u16 version)
  13 {
  14         return BCH_VERSION_MAJOR(version) <= BCH_VERSION_MAJOR(bcachefs_metadata_version_current) &&
  15                 version >= bcachefs_metadata_version_min;
  16 }
  17
  18 void bch2_version_to_text(struct printbuf *, unsigned);
  19 unsigned bch2_latest_compatible_version(unsigned);
  20
  21 struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
  22 struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *,
  23                                           enum bch_sb_field_type, unsigned);
  24 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
  25
  26 #define field_to_type(_f, _name)                                        \
  27         container_of_or_null(_f, struct bch_sb_field_##_name, field)
  28
  29 #define x(_name, _nr)                                                   \
  30 static inline struct bch_sb_field_##_name *                             \
  31 bch2_sb_get_##_name(struct bch_sb *sb)                                  \
  32 {                                                                       \
  33         return field_to_type(bch2_sb_field_get(sb,                      \
  34                                 BCH_SB_FIELD_##_name), _name);          \
  35 }                                                                       \
  36                                                                         \
  37 static inline struct bch_sb_field_##_name *                             \
  38 bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
  39 {                                                                       \
  40         return field_to_type(bch2_sb_field_resize(sb,                   \
  41                                 BCH_SB_FIELD_##_name, u64s), _name);    \
  42 }
  43
  44 BCH_SB_FIELDS()
  45 #undef x
  46
  47 extern const char * const bch2_sb_fields[];
  48
  49 struct bch_sb_field_ops {
  50         int     (*validate)(struct bch_sb *, struct bch_sb_field *, struct printbuf *);
  51         void    (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
  52 };
  53
  54 static inline __le64 bch2_sb_magic(struct bch_fs *c)
  55 {
  56         __le64 ret;
  57         memcpy(&ret, &c->sb.uuid, sizeof(ret));
  58         return ret;
  59 }
  60
  61 static inline __u64 jset_magic(struct bch_fs *c)
  62 {
  63         return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
  64 }
  65
  66 static inline __u64 bset_magic(struct bch_fs *c)
  67 {
  68         return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
  69 }
  70
  71 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
  72 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
  73
  74 void bch2_free_super(struct bch_sb_handle *);
  75 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
  76
  77 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
  78 int bch2_write_super(struct bch_fs *);
  79 void __bch2_check_set_feature(struct bch_fs *, unsigned);
  80
  81 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
  82 {
  83         if (!(c->sb.features & (1ULL << feat)))
  84                 __bch2_check_set_feature(c, feat);
  85 }
  86
  87 /* BCH_SB_FIELD_members: */
  88
  89 static inline bool bch2_member_exists(struct bch_member *m)
  90 {
  91         return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
  92 }
  93
  94 static inline bool bch2_dev_exists(struct bch_sb *sb,
  95                                    struct bch_sb_field_members *mi,
  96                                    unsigned dev)
  97 {
  98         return dev < sb->nr_devices &&
  99                 bch2_member_exists(&mi->members[dev]);
 100 }
 101
 102 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
 103 {
 104         return (struct bch_member_cpu) {
 105                 .nbuckets       = le64_to_cpu(mi->nbuckets),
 106                 .first_bucket   = le16_to_cpu(mi->first_bucket),
 107                 .bucket_size    = le16_to_cpu(mi->bucket_size),
 108                 .group          = BCH_MEMBER_GROUP(mi),
 109                 .state          = BCH_MEMBER_STATE(mi),
 110                 .discard        = BCH_MEMBER_DISCARD(mi),
 111                 .data_allowed   = BCH_MEMBER_DATA_ALLOWED(mi),
 112                 .durability     = BCH_MEMBER_DURABILITY(mi)
 113                         ? BCH_MEMBER_DURABILITY(mi) - 1
 114                         : 1,
 115                 .freespace_initialized = BCH_MEMBER_FREESPACE_INITIALIZED(mi),
 116                 .valid          = bch2_member_exists(mi),
 117         };
 118 }
 119
 120 /* BCH_SB_FIELD_clean: */
 121
 122 void bch2_journal_super_entries_add_common(struct bch_fs *,
 123                                            struct jset_entry **, u64);
 124
 125 int bch2_sb_clean_validate_late(struct bch_fs *, struct bch_sb_field_clean *, int);
 126
 127 int bch2_fs_mark_dirty(struct bch_fs *);
 128 void bch2_fs_mark_clean(struct bch_fs *);
 129
 130 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
 131                            struct bch_sb_field *);
 132 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
 133 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
 134
 135 #endif /* _BCACHEFS_SUPER_IO_H */