| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _BCACHEFS_REFLINK_FORMAT_H |
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| 3 | #define _BCACHEFS_REFLINK_FORMAT_H |
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| 4 | |
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| 5 | struct bch_reflink_p { |
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| 6 | struct bch_val v; |
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| 7 | __le64 idx; |
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| 8 | /* |
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| 9 | * A reflink pointer might point to an indirect extent which is then |
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| 10 | * later split (by copygc or rebalance). If we only pointed to part of |
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| 11 | * the original indirect extent, and then one of the fragments is |
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| 12 | * outside the range we point to, we'd leak a refcount: so when creating |
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| 13 | * reflink pointers, we need to store pad values to remember the full |
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| 14 | * range we were taking a reference on. |
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| 15 | */ |
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| 16 | __le32 front_pad; |
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| 17 | __le32 back_pad; |
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| 18 | } __packed __aligned(8); |
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| 19 | |
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| 20 | struct bch_reflink_v { |
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| 21 | struct bch_val v; |
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| 22 | __le64 refcount; |
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| 23 | union bch_extent_entry start[0]; |
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| 24 | __u64 _data[]; |
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| 25 | } __packed __aligned(8); |
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| 26 | |
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| 27 | struct bch_indirect_inline_data { |
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| 28 | struct bch_val v; |
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| 29 | __le64 refcount; |
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| 30 | u8 data[]; |
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| 31 | }; |
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| 32 | |
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| 33 | #endif /* _BCACHEFS_REFLINK_FORMAT_H */ |
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| 34 | |
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