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