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 u64 bch2_upgrade_recovery_passes(struct bch_fs *c,
  22                                  unsigned,
  23                                  unsigned);
  24
  25 struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
  26 struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *,
  27                                           enum bch_sb_field_type, unsigned);
  28 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
  29
  30 #define field_to_type(_f, _name)                                        \
  31         container_of_or_null(_f, struct bch_sb_field_##_name, field)
  32
  33 #define x(_name, _nr)                                                   \
  34 static inline struct bch_sb_field_##_name *                             \
  35 bch2_sb_get_##_name(struct bch_sb *sb)                                  \
  36 {                                                                       \
  37         return field_to_type(bch2_sb_field_get(sb,                      \
  38                                 BCH_SB_FIELD_##_name), _name);          \
  39 }                                                                       \
  40                                                                         \
  41 static inline struct bch_sb_field_##_name *                             \
  42 bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
  43 {                                                                       \
  44         return field_to_type(bch2_sb_field_resize(sb,                   \
  45                                 BCH_SB_FIELD_##_name, u64s), _name);    \
  46 }
  47
  48 BCH_SB_FIELDS()
  49 #undef x
  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 *, struct printbuf *);
  55         void    (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
  56 };
  57
  58 static inline __le64 bch2_sb_magic(struct bch_fs *c)
  59 {
  60         __le64 ret;
  61         memcpy(&ret, &c->sb.uuid, sizeof(ret));
  62         return ret;
  63 }
  64
  65 static inline __u64 jset_magic(struct bch_fs *c)
  66 {
  67         return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
  68 }
  69
  70 static inline __u64 bset_magic(struct bch_fs *c)
  71 {
  72         return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
  73 }
  74
  75 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
  76 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
  77
  78 void bch2_free_super(struct bch_sb_handle *);
  79 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
  80
  81 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
  82 int bch2_write_super(struct bch_fs *);
  83 void __bch2_check_set_feature(struct bch_fs *, unsigned);
  84
  85 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
  86 {
  87         if (!(c->sb.features & (1ULL << feat)))
  88                 __bch2_check_set_feature(c, feat);
  89 }
  90
  91 /* BCH_SB_FIELD_members: */
  92
  93 static inline bool bch2_member_exists(struct bch_member *m)
  94 {
  95         return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
  96 }
  97
  98 static inline bool bch2_dev_exists(struct bch_sb *sb,
  99                                    struct bch_sb_field_members *mi,
 100                                    unsigned dev)
 101 {
 102         return dev < sb->nr_devices &&
 103                 bch2_member_exists(&mi->members[dev]);
 104 }
 105
 106 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
 107 {
 108         return (struct bch_member_cpu) {
 109                 .nbuckets       = le64_to_cpu(mi->nbuckets),
 110                 .first_bucket   = le16_to_cpu(mi->first_bucket),
 111                 .bucket_size    = le16_to_cpu(mi->bucket_size),
 112                 .group          = BCH_MEMBER_GROUP(mi),
 113                 .state          = BCH_MEMBER_STATE(mi),
 114                 .discard        = BCH_MEMBER_DISCARD(mi),
 115                 .data_allowed   = BCH_MEMBER_DATA_ALLOWED(mi),
 116                 .durability     = BCH_MEMBER_DURABILITY(mi)
 117                         ? BCH_MEMBER_DURABILITY(mi) - 1
 118                         : 1,
 119                 .freespace_initialized = BCH_MEMBER_FREESPACE_INITIALIZED(mi),
 120                 .valid          = bch2_member_exists(mi),
 121         };
 122 }
 123
 124 void bch2_sb_maybe_downgrade(struct bch_fs *);
 125 void bch2_sb_upgrade(struct bch_fs *, unsigned);
 126
 127 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
 128                            struct bch_sb_field *);
 129 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
 130 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
 131
 132 #endif /* _BCACHEFS_SUPER_IO_H */