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Previously, there was a bug where if an extent had greater durability than required (because we needed to move a durability=1 pointer and ended up putting it on a durability 2 device), we would submit a write for replicas=2 - the durability of the pointer being rewritten - instead of the number of replicas required to bring it back up to the data_replicas option. This, plus the allocation path sometimes allocating on a greater durability device than requested, meant that extents could continue having more and more replicas added as they were being rewritten. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_DATA_UPDATE_H
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#define _BCACHEFS_DATA_UPDATE_H
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#include "bkey_buf.h"
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#include "io_write_types.h"
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struct moving_context;
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struct data_update_opts {
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unsigned rewrite_ptrs;
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unsigned kill_ptrs;
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u16 target;
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u8 extra_replicas;
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unsigned btree_insert_flags;
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unsigned write_flags;
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};
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struct data_update {
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/* extent being updated: */
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enum btree_id btree_id;
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struct bkey_buf k;
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struct data_update_opts data_opts;
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struct moving_context *ctxt;
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struct bch_move_stats *stats;
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struct bch_write_op op;
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};
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int bch2_data_update_index_update(struct bch_write_op *);
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void bch2_data_update_read_done(struct data_update *,
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struct bch_extent_crc_unpacked);
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int bch2_extent_drop_ptrs(struct btree_trans *,
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struct btree_iter *,
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struct bkey_s_c,
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struct data_update_opts);
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void bch2_data_update_exit(struct data_update *);
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int bch2_data_update_init(struct btree_trans *, struct btree_iter *,
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struct moving_context *,
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struct data_update *,
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struct write_point_specifier,
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struct bch_io_opts, struct data_update_opts,
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enum btree_id, struct bkey_s_c);
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void bch2_data_update_opts_normalize(struct bkey_s_c, struct data_update_opts *);
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#endif /* _BCACHEFS_DATA_UPDATE_H */
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