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 struct bch_sb_field *bch2_sb_field_get(struct bch_sb *, enum bch_sb_field_type);
  27 struct bch_sb_field *bch2_sb_field_resize(struct bch_sb_handle *,
  28                                           enum bch_sb_field_type, unsigned);
  29 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type);
  30
  31 #define field_to_type(_f, _name)                                        \
  32         container_of_or_null(_f, struct bch_sb_field_##_name, field)
  33
  34 #define x(_name, _nr)                                                   \
  35 static inline struct bch_sb_field_##_name *                             \
  36 bch2_sb_get_##_name(struct bch_sb *sb)                                  \
  37 {                                                                       \
  38         return field_to_type(bch2_sb_field_get(sb,                      \
  39                                 BCH_SB_FIELD_##_name), _name);          \
  40 }                                                                       \
  41                                                                         \
  42 static inline struct bch_sb_field_##_name *                             \
  43 bch2_sb_resize_##_name(struct bch_sb_handle *sb, unsigned u64s) \
  44 {                                                                       \
  45         return field_to_type(bch2_sb_field_resize(sb,                   \
  46                                 BCH_SB_FIELD_##_name, u64s), _name);    \
  47 }
  48
  49 BCH_SB_FIELDS()
  50 #undef x
  51
  52 extern const char * const bch2_sb_fields[];
  53
  54 struct bch_sb_field_ops {
  55         int     (*validate)(struct bch_sb *, struct bch_sb_field *, struct printbuf *);
  56         void    (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *);
  57 };
  58
  59 static inline __le64 bch2_sb_magic(struct bch_fs *c)
  60 {
  61         __le64 ret;
  62
  63         memcpy(&ret, &c->sb.uuid, sizeof(ret));
  64         return ret;
  65 }
  66
  67 static inline __u64 jset_magic(struct bch_fs *c)
  68 {
  69         return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC);
  70 }
  71
  72 static inline __u64 bset_magic(struct bch_fs *c)
  73 {
  74         return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC);
  75 }
  76
  77 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *);
  78 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *);
  79
  80 void bch2_free_super(struct bch_sb_handle *);
  81 int bch2_sb_realloc(struct bch_sb_handle *, unsigned);
  82
  83 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *);
  84 int bch2_write_super(struct bch_fs *);
  85 void __bch2_check_set_feature(struct bch_fs *, unsigned);
  86
  87 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat)
  88 {
  89         if (!(c->sb.features & (1ULL << feat)))
  90                 __bch2_check_set_feature(c, feat);
  91 }
  92
  93 /* BCH_SB_FIELD_members_v1: */
  94
  95 static inline bool bch2_member_exists(struct bch_member *m)
  96 {
  97         return !bch2_is_zero(&m->uuid, sizeof(m->uuid));
  98 }
  99
 100 static inline bool bch2_dev_exists(struct bch_sb *sb,
 101                                    unsigned dev)
 102 {
 103         if (dev < sb->nr_devices) {
 104         struct bch_member m = bch2_sb_member_get(sb, dev);
 105                 return bch2_member_exists(&m);
 106         }
 107         return false;
 108 }
 109
 110 static inline struct bch_member_cpu bch2_mi_to_cpu(struct bch_member *mi)
 111 {
 112         return (struct bch_member_cpu) {
 113                 .nbuckets       = le64_to_cpu(mi->nbuckets),
 114                 .first_bucket   = le16_to_cpu(mi->first_bucket),
 115                 .bucket_size    = le16_to_cpu(mi->bucket_size),
 116                 .group          = BCH_MEMBER_GROUP(mi),
 117                 .state          = BCH_MEMBER_STATE(mi),
 118                 .discard        = BCH_MEMBER_DISCARD(mi),
 119                 .data_allowed   = BCH_MEMBER_DATA_ALLOWED(mi),
 120                 .durability     = BCH_MEMBER_DURABILITY(mi)
 121                         ? BCH_MEMBER_DURABILITY(mi) - 1
 122                         : 1,
 123                 .freespace_initialized = BCH_MEMBER_FREESPACE_INITIALIZED(mi),
 124                 .valid          = bch2_member_exists(mi),
 125         };
 126 }
 127
 128 void bch2_sb_maybe_downgrade(struct bch_fs *);
 129 void bch2_sb_upgrade(struct bch_fs *, unsigned);
 130
 131 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *,
 132                            struct bch_sb_field *);
 133 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *);
 134 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned);
 135
 136 #endif /* _BCACHEFS_SUPER_IO_H */