/* SPDX-License-Identifier: GPL-2.0 */#ifndef _BCACHEFS_BACKPOINTERS_BACKGROUND_H#define _BCACHEFS_BACKPOINTERS_BACKGROUND_H #include "btree_cache.h"#include "btree_iter.h"#include "btree_update.h"#include "buckets.h"#include "super.h" static inline u64 swab40(u64 x){	return (((x & 0x00000000ffULL) << 32)|		((x & 0x000000ff00ULL) << 16)|		((x & 0x0000ff0000ULL) >>  0)|		((x & 0x00ff000000ULL) >> 16)|		((x & 0xff00000000ULL) >> 32));} int bch2_backpointer_invalid(struct bch_fs *, struct bkey_s_c k,			     enum bkey_invalid_flags, struct printbuf *);void bch2_backpointer_to_text(struct printbuf *, const struct bch_backpointer *);void bch2_backpointer_k_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);void bch2_backpointer_swab(struct bkey_s); #define bch2_bkey_ops_backpointer ((struct bkey_ops) {	\	.key_invalid	= bch2_backpointer_invalid,	\	.val_to_text	= bch2_backpointer_k_to_text,	\	.swab		= bch2_backpointer_swab,	\	.min_val_size	= 32,				\}) #define MAX_EXTENT_COMPRESS_RATIO_SHIFT		10 /* * Convert from pos in backpointer btree to pos of corresponding bucket in alloc * btree: */static inline struct bpos bp_pos_to_bucket(const struct bch_fs *c,					   struct bpos bp_pos){	struct bch_dev *ca = bch_dev_bkey_exists(c, bp_pos.inode);	u64 bucket_sector = bp_pos.offset >> MAX_EXTENT_COMPRESS_RATIO_SHIFT; 	return POS(bp_pos.inode, sector_to_bucket(ca, bucket_sector));} /* * Convert from pos in alloc btree + bucket offset to pos in backpointer btree: */static inline struct bpos bucket_pos_to_bp(const struct bch_fs *c,					   struct bpos bucket,					   u64 bucket_offset){	struct bch_dev *ca = bch_dev_bkey_exists(c, bucket.inode);	struct bpos ret; 	ret = POS(bucket.inode,		  (bucket_to_sector(ca, bucket.offset) <<		   MAX_EXTENT_COMPRESS_RATIO_SHIFT) + bucket_offset); 	EBUG_ON(!bkey_eq(bucket, bp_pos_to_bucket(c, ret))); 	return ret;} int bch2_bucket_backpointer_mod_nowritebuffer(struct btree_trans *, struct bpos bucket,				struct bch_backpointer, struct bkey_s_c, bool); static inline int bch2_bucket_backpointer_mod(struct btree_trans *trans,				struct bpos bucket,				struct bch_backpointer bp,				struct bkey_s_c orig_k,				bool insert){	if (unlikely(bch2_backpointers_no_use_write_buffer))		return bch2_bucket_backpointer_mod_nowritebuffer(trans, bucket, bp, orig_k, insert); 	struct bkey_i_backpointer bp_k; 	bkey_backpointer_init(&bp_k.k_i);	bp_k.k.p = bucket_pos_to_bp(trans->c, bucket, bp.bucket_offset);	bp_k.v = bp; 	if (!insert) {		bp_k.k.type = KEY_TYPE_deleted;		set_bkey_val_u64s(&bp_k.k, 0);	} 	return bch2_trans_update_buffered(trans, BTREE_ID_backpointers, &bp_k.k_i);} static inline enum bch_data_type bkey_ptr_data_type(enum btree_id btree_id, unsigned level,						    struct bkey_s_c k, struct extent_ptr_decoded p){	return  level		? BCH_DATA_btree :		p.has_ec	? BCH_DATA_stripe :				  BCH_DATA_user;} static inline void bch2_extent_ptr_to_bp(struct bch_fs *c,			   enum btree_id btree_id, unsigned level,			   struct bkey_s_c k, struct extent_ptr_decoded p,			   struct bpos *bucket_pos, struct bch_backpointer *bp){	enum bch_data_type data_type = bkey_ptr_data_type(btree_id, level, k, p);	s64 sectors = level ? btree_sectors(c) : k.k->size;	u32 bucket_offset; 	*bucket_pos = PTR_BUCKET_POS_OFFSET(c, &p.ptr, &bucket_offset);	*bp = (struct bch_backpointer) {		.btree_id	= btree_id,		.level		= level,		.data_type	= data_type,		.bucket_offset	= ((u64) bucket_offset << MAX_EXTENT_COMPRESS_RATIO_SHIFT) +			p.crc.offset,		.bucket_len	= ptr_disk_sectors(sectors, p),		.pos		= k.k->p,	};} int bch2_get_next_backpointer(struct btree_trans *, struct bpos, int,			      struct bpos *, struct bch_backpointer *, unsigned);struct bkey_s_c bch2_backpointer_get_key(struct btree_trans *, struct btree_iter *,					 struct bpos, struct bch_backpointer,					 unsigned);struct btree *bch2_backpointer_get_node(struct btree_trans *, struct btree_iter *,					struct bpos, struct bch_backpointer); int bch2_check_btree_backpointers(struct bch_fs *);int bch2_check_extents_to_backpointers(struct bch_fs *);int bch2_check_backpointers_to_extents(struct bch_fs *); #endif /* _BCACHEFS_BACKPOINTERS_BACKGROUND_H */