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 static inline size_t bch2_sb_field_bytes(struct bch_sb_field *f) 27 { 28 return le32_to_cpu(f->u64s) * sizeof(u64); 29 } 30 31 #define field_to_type(_f, _name) \ 32 container_of_or_null(_f, struct bch_sb_field_##_name, field) 33 34 struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *, enum bch_sb_field_type); 35 #define bch2_sb_field_get(_sb, _name) \ 36 field_to_type(bch2_sb_field_get_id(_sb, BCH_SB_FIELD_##_name), _name) 37 38 struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *, 39 enum bch_sb_field_type, unsigned); 40 #define bch2_sb_field_resize(_sb, _name, _u64s) \ 41 field_to_type(bch2_sb_field_resize_id(_sb, BCH_SB_FIELD_##_name, _u64s), _name) 42 43 void bch2_sb_field_delete(struct bch_sb_handle *, enum bch_sb_field_type); 44 45 extern const char * const bch2_sb_fields[]; 46 47 struct bch_sb_field_ops { 48 int (*validate)(struct bch_sb *, struct bch_sb_field *, struct printbuf *); 49 void (*to_text)(struct printbuf *, struct bch_sb *, struct bch_sb_field *); 50 }; 51 52 static inline __le64 bch2_sb_magic(struct bch_fs *c) 53 { 54 __le64 ret; 55 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 void bch2_sb_maybe_downgrade(struct bch_fs *); 87 void bch2_sb_upgrade(struct bch_fs *, unsigned); 88 89 void bch2_sb_field_to_text(struct printbuf *, struct bch_sb *, 90 struct bch_sb_field *); 91 void bch2_sb_layout_to_text(struct printbuf *, struct bch_sb_layout *); 92 void bch2_sb_to_text(struct printbuf *, struct bch_sb *, bool, unsigned); 93 94 #endif /* _BCACHEFS_SUPER_IO_H */ 95