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Signed-off-by: Kent Overstreet <[email protected]>
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Kent Overstreet
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Jan 21, 2024
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/* SPDX-License-Identifier: GPL-2.0 */ | ||
#ifndef _BCACHEFS_REFLINK_FORMAT_H | ||
#define _BCACHEFS_REFLINK_FORMAT_H | ||
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struct bch_reflink_p { | ||
struct bch_val v; | ||
__le64 idx; | ||
/* | ||
* A reflink pointer might point to an indirect extent which is then | ||
* later split (by copygc or rebalance). If we only pointed to part of | ||
* the original indirect extent, and then one of the fragments is | ||
* outside the range we point to, we'd leak a refcount: so when creating | ||
* reflink pointers, we need to store pad values to remember the full | ||
* range we were taking a reference on. | ||
*/ | ||
__le32 front_pad; | ||
__le32 back_pad; | ||
} __packed __aligned(8); | ||
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struct bch_reflink_v { | ||
struct bch_val v; | ||
__le64 refcount; | ||
union bch_extent_entry start[0]; | ||
__u64 _data[]; | ||
} __packed __aligned(8); | ||
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struct bch_indirect_inline_data { | ||
struct bch_val v; | ||
__le64 refcount; | ||
u8 data[]; | ||
}; | ||
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#endif /* _BCACHEFS_REFLINK_FORMAT_H */ |