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