linux/fs/bcachefs/reflink.c

// SPDX-License-Identifier: GPL-2.0
#include "bcachefs.h"
#include "bkey_buf.h"
#include "btree_update.h"
#include "buckets.h"
#include "error.h"
#include "extents.h"
#include "inode.h"
#include "io_misc.h"
#include "io_write.h"
#include "rebalance.h"
#include "reflink.h"
#include "subvolume.h"
#include "super-io.h"

#include <linux/sched/signal.h>

static inline unsigned bkey_type_to_indirect(const struct bkey *k)
{ … }

/* reflink pointers */

int bch2_reflink_p_invalid(struct bch_fs *c, struct bkey_s_c k,
			   enum bch_validate_flags flags,
			   struct printbuf *err)
{ … }

void bch2_reflink_p_to_text(struct printbuf *out, struct bch_fs *c,
			    struct bkey_s_c k)
{ … }

bool bch2_reflink_p_merge(struct bch_fs *c, struct bkey_s _l, struct bkey_s_c _r)
{ … }

static int trans_trigger_reflink_p_segment(struct btree_trans *trans,
			struct bkey_s_c_reflink_p p, u64 *idx,
			enum btree_iter_update_trigger_flags flags)
{ … }

static s64 gc_trigger_reflink_p_segment(struct btree_trans *trans,
				struct bkey_s_c_reflink_p p, u64 *idx,
				enum btree_iter_update_trigger_flags flags,
				size_t r_idx)
{ … }

static int __trigger_reflink_p(struct btree_trans *trans,
		enum btree_id btree_id, unsigned level, struct bkey_s_c k,
		enum btree_iter_update_trigger_flags flags)
{ … }

int bch2_trigger_reflink_p(struct btree_trans *trans,
			   enum btree_id btree_id, unsigned level,
			   struct bkey_s_c old,
			   struct bkey_s new,
			   enum btree_iter_update_trigger_flags flags)
{ … }

/* indirect extents */

int bch2_reflink_v_invalid(struct bch_fs *c, struct bkey_s_c k,
			   enum bch_validate_flags flags,
			   struct printbuf *err)
{ … }

void bch2_reflink_v_to_text(struct printbuf *out, struct bch_fs *c,
			    struct bkey_s_c k)
{ … }

#if 0
Currently disabled, needs to be debugged:

bool bch2_reflink_v_merge(struct bch_fs *c, struct bkey_s _l, struct bkey_s_c _r)
{
	struct bkey_s_reflink_v   l = bkey_s_to_reflink_v(_l);
	struct bkey_s_c_reflink_v r = bkey_s_c_to_reflink_v(_r);

	return l.v->refcount == r.v->refcount && bch2_extent_merge(c, _l, _r);
}
#endif

static inline void
check_indirect_extent_deleting(struct bkey_s new,
			       enum btree_iter_update_trigger_flags *flags)
{ … }

int bch2_trigger_reflink_v(struct btree_trans *trans,
			   enum btree_id btree_id, unsigned level,
			   struct bkey_s_c old, struct bkey_s new,
			   enum btree_iter_update_trigger_flags flags)
{ … }

/* indirect inline data */

int bch2_indirect_inline_data_invalid(struct bch_fs *c, struct bkey_s_c k,
				      enum bch_validate_flags flags,
				      struct printbuf *err)
{ … }

void bch2_indirect_inline_data_to_text(struct printbuf *out,
				       struct bch_fs *c, struct bkey_s_c k)
{ … }

int bch2_trigger_indirect_inline_data(struct btree_trans *trans,
			      enum btree_id btree_id, unsigned level,
			      struct bkey_s_c old, struct bkey_s new,
			      enum btree_iter_update_trigger_flags flags)
{ … }

static int bch2_make_extent_indirect(struct btree_trans *trans,
				     struct btree_iter *extent_iter,
				     struct bkey_i *orig)
{ … }

static struct bkey_s_c get_next_src(struct btree_iter *iter, struct bpos end)
{ … }

s64 bch2_remap_range(struct bch_fs *c,
		     subvol_inum dst_inum, u64 dst_offset,
		     subvol_inum src_inum, u64 src_offset,
		     u64 remap_sectors,
		     u64 new_i_size, s64 *i_sectors_delta)
{ … }