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 #define BCH_SB_READ_SCRATCH_BUF_SIZE 4096 14 15 static inline bool bch2_version_compatible(u16 version) 16 { 17 return BCH_VERSION_MAJOR(version) <= BCH_VERSION_MAJOR(bcachefs_metadata_version_current) && 18 version >= bcachefs_metadata_version_min; 19 } 20 21 void bch2_version_to_text(struct printbuf *, enum bcachefs_metadata_version); 22 enum bcachefs_metadata_version bch2_latest_compatible_version(enum bcachefs_metadata_version); 23 24 void bch2_set_version_incompat(struct bch_fs *, enum bcachefs_metadata_version); 25 26 static inline bool bch2_request_incompat_feature(struct bch_fs *c, 27 enum bcachefs_metadata_version version) 28 { 29 if (unlikely(version > c->sb.version_incompat)) { 30 if (version > c->sb.version_incompat_allowed) 31 return false; 32 bch2_set_version_incompat(c, version); 33 } 34 return true; 35 } 36 37 static inline size_t bch2_sb_field_bytes(struct bch_sb_field *f) 38 { 39 return le32_to_cpu(f->u64s) * sizeof(u64); 40 } 41 42 #define field_to_type(_f, _name) \ 43 container_of_or_null(_f, struct bch_sb_field_##_name, field) 44 45 struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *, enum bch_sb_field_type); 46 #define bch2_sb_field_get(_sb, _name) \ 47 field_to_type(bch2_sb_field_get_id(_sb, BCH_SB_FIELD_##_name), _name) 48 49 struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *, 50 enum bch_sb_field_type, unsigned); 51 #define bch2_sb_field_resize(_sb, _name, _u64s) \ 52 field_to_type(bch2_sb_field_resize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name) 53 54 struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *, 55 enum bch_sb_field_type, unsigned); 56 #define bch2_sb_field_get_minsize(_sb, _name, _u64s) \ 57 field_to_type(bch2_sb_field_get_minsize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name) 58 59 #define bch2_sb_field_nr_entries(_f) \ 60 (_f ? ((bch2_sb_field_bytes(&_f->field) - sizeof(*_f)) / \ 61 sizeof(_f->entries[0])) \ 62 : 0) 63 64 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type); 65 66 extern const char * const bch2_sb_fields[]; 67 68 struct bch_sb_field_ops { 69 int (*validate)(struct bch_sb *, struct bch_sb_field *, 70 enum bch_validate_flags, struct printbuf *); 71 void (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *); 72 }; 73 74 static inline __le64 bch2_sb_magic(struct bch_fs *c) 75 { 76 __le64 ret; 77 78 memcpy(&ret, &c->sb.uuid, sizeof(ret)); 79 return ret; 80 } 81 82 static inline __u64 jset_magic(struct bch_fs *c) 83 { 84 return __le64_to_cpu(bch2_sb_magic(c) ^ JSET_MAGIC); 85 } 86 87 static inline __u64 bset_magic(struct bch_fs *c) 88 { 89 return __le64_to_cpu(bch2_sb_magic(c) ^ BSET_MAGIC); 90 } 91 92 int bch2_sb_to_fs(struct bch_fs *, struct bch_sb *); 93 int bch2_sb_from_fs(struct bch_fs *, struct bch_dev *); 94 95 void bch2_free_super(struct bch_sb_handle *); 96 int bch2_sb_realloc(struct bch_sb_handle *, unsigned); 97 98 int bch2_read_super(const char *, struct bch_opts *, struct bch_sb_handle *); 99 int bch2_read_super_silent(const char *, struct bch_opts *, struct bch_sb_handle *); 100 int bch2_write_super(struct bch_fs *); 101 void __bch2_check_set_feature(struct bch_fs *, unsigned); 102 103 static inline void bch2_check_set_feature(struct bch_fs *c, unsigned feat) 104 { 105 if (!(c->sb.features & (1ULL << feat))) 106 __bch2_check_set_feature(c, feat); 107 } 108 109 bool bch2_check_version_downgrade(struct bch_fs *); 110 void bch2_sb_upgrade(struct bch_fs *, unsigned, bool); 111 112 void __bch2_sb_field_to_text(struct printbuf *, struct bch_sb *, 113 struct bch_sb_field *); 114 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *, 115 struct bch_sb_field *); 116 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *); 117 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned); 118 119 #endif /* _BCACHEFS_SUPER_IO_H */ 120