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 static inline size_t bch2_sb_field_bytes(struct bch_sb_field *f) 23 { 24 return le32_to_cpu(f->u64s) * sizeof(u64); 25 } 26 27 #define field_to_type(_f, _name) \ 28 container_of_or_null(_f, struct bch_sb_field_##_name, field) 29 30 struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *, enum bch_sb_field_type); 31 #define bch2_sb_field_get(_sb, _name) \ 32 field_to_type(bch2_sb_field_get_id(_sb, BCH_SB_FIELD_##_name), _name) 33 34 struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *, 35 enum bch_sb_field_type, unsigned); 36 #define bch2_sb_field_resize(_sb, _name, _u64s) \ 37 field_to_type(bch2_sb_field_resize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name) 38 39 struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *, 40 enum bch_sb_field_type, unsigned); 41 #define bch2_sb_field_get_minsize(_sb, _name, _u64s) \ 42 field_to_type(bch2_sb_field_get_minsize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name) 43 44 #define bch2_sb_field_nr_entries(_f) \ 45 (_f ? ((bch2_sb_field_bytes(&_f->field) - sizeof(*_f)) / \ 46 sizeof(_f->entries[0])) \ 47 : 0) 48 49 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type); 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 *, 55 enum bch_validate_flags, 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_read_super_silent(const char *, struct bch_opts *, struct bch_sb_handle *); 85 int bch2_write_super(struct bch_fs *); 86 void __bch2_check_set_feature(struct bch_fs *, unsigned); 87 88 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat) 89 { 90 if (!(c->sb.features & (1ULL << feat))) 91 __bch2_check_set_feature(c, feat); 92 } 93 94 bool bch2_check_version_downgrade(struct bch_fs *); 95 void bch2_sb_upgrade(struct bch_fs *, unsigned); 96 97 void __bch2_sb_field_to_text(struct printbuf *, struct bch_sb *, 98 struct bch_sb_field *); 99 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *, 100 struct bch_sb_field *); 101 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *); 102 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned); 103 104 #endif /* _BCACHEFS_SUPER_IO_H */ 105