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39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_REFLINK_FORMAT_H
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#define _BCACHEFS_REFLINK_FORMAT_H
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struct bch_reflink_p {
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struct bch_val v;
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__le64 idx_flags;
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/*
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* A reflink pointer might point to an indirect extent which is then
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* later split (by copygc or rebalance). If we only pointed to part of
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* the original indirect extent, and then one of the fragments is
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* outside the range we point to, we'd leak a refcount: so when creating
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* reflink pointers, we need to store pad values to remember the full
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* range we were taking a reference on.
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*/
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__le32 front_pad;
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__le32 back_pad;
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} __packed __aligned(8);
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LE64_BITMASK(REFLINK_P_IDX, struct bch_reflink_p, idx_flags, 0, 56);
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LE64_BITMASK(REFLINK_P_ERROR, struct bch_reflink_p, idx_flags, 56, 57);
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LE64_BITMASK(REFLINK_P_MAY_UPDATE_OPTIONS,
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struct bch_reflink_p, idx_flags, 57, 58);
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struct bch_reflink_v {
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struct bch_val v;
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__le64 refcount;
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union bch_extent_entry start[0];
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__u64 _data[];
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} __packed __aligned(8);
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struct bch_indirect_inline_data {
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struct bch_val v;
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__le64 refcount;
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u8 data[];
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};
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#endif /* _BCACHEFS_REFLINK_FORMAT_H */
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