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 #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 u64 bch2_upgrade_recovery_passes(struct bch_fs *c,
  23                                  unsigned,
  24                                  unsigned);
  25
  26 #define field_to_type(_f, _name)                                        \
  27         container_of_or_null(_f, struct bch_sb_field_##_name, field)
  28
  29 struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *, enum bch_sb_field_type);
  30 #define bch2_sb_field_get(_sb, _name)                                   \
  31         field_to_type(bch2_sb_field_get_id(_sb, BCH_SB_FIELD_##_name), _name)
  32
  33 struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *,
  34                                              enum bch_sb_field_type, unsigned);
  35 #define bch2_sb_field_resize(_sb, _name, _u64s)                         \
  36         field_to_type(bch2_sb_field_resize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name)
  37
  38 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
  39
  40 extern const char * const bch2_sb_fields[];
  41
  42 struct bch_sb_field_ops {
  43         int     (*validate)(struct bch_sb *, struct bch_sb_field *, struct printbuf *);
  44         void    (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
  45 };
  46
  47 static inline __le64 bch2_sb_magic(struct bch_fs *c)
  48 {
  49         __le64 ret;
  50
  51         memcpy(&ret, &c->sb.uuid, sizeof(ret));
  52         return ret;
  53 }
  54
  55 static inline __u64 jset_magic(struct bch_fs *c)
  56 {
  57         return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
  58 }
  59
  60 static inline __u64 bset_magic(struct bch_fs *c)
  61 {
  62         return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
  63 }
  64
  65 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
  66 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
  67
  68 void bch2_free_super(struct bch_sb_handle *);
  69 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
  70
  71 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
  72 int bch2_write_super(struct bch_fs *);
  73 void __bch2_check_set_feature(struct bch_fs *, unsigned);
  74
  75 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
  76 {
  77         if (!(c->sb.features & (1ULL << feat)))
  78                 __bch2_check_set_feature(c, feat);
  79 }
  80
  81 /* BCH_SB_FIELD_members_v1: */
  82
  83 static inline bool bch2_member_exists(struct bch_member *m)
  84 {
  85         return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
  86 }
  87
  88 static inline bool bch2_dev_exists(struct bch_sb *sb,
  89                                    unsigned dev)
  90 {
  91         if (dev < sb->nr_devices) {
  92         struct bch_member m = bch2_sb_member_get(sb, dev);
  93                 return bch2_member_exists(&m);
  94         }
  95         return false;
  96 }
  97
  98 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
  99 {
 100         return (struct bch_member_cpu) {
 101                 .nbuckets       = le64_to_cpu(mi->nbuckets),
 102                 .first_bucket   = le16_to_cpu(mi->first_bucket),
 103                 .bucket_size    = le16_to_cpu(mi->bucket_size),
 104                 .group          = BCH_MEMBER_GROUP(mi),
 105                 .state          = BCH_MEMBER_STATE(mi),
 106                 .discard        = BCH_MEMBER_DISCARD(mi),
 107                 .data_allowed   = BCH_MEMBER_DATA_ALLOWED(mi),
 108                 .durability     = BCH_MEMBER_DURABILITY(mi)
 109                         ? BCH_MEMBER_DURABILITY(mi) - 1
 110                         : 1,
 111                 .freespace_initialized = BCH_MEMBER_FREESPACE_INITIALIZED(mi),
 112                 .valid          = bch2_member_exists(mi),
 113         };
 114 }
 115
 116 void bch2_sb_maybe_downgrade(struct bch_fs *);
 117 void bch2_sb_upgrade(struct bch_fs *, unsigned);
 118
 119 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
 120                            struct bch_sb_field *);
 121 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
 122 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
 123
 124 #endif /* _BCACHEFS_SUPER_IO_H */