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original_kernel/fs/bcachefs/varint.h

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bcachefs: New varints Previous varint implementation used by the inode code was not nearly as fast as it could have been; partly because it was attempting to encode integers up to 96 bits (for timestamps) but this meant that encoding and decoding the length required a table lookup. Instead, we'll just encode timestamps greater than 64 bits as two separate varints; this will make decoding/encoding of inodes significantly faster overall. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2020-11-06 12:39:33 +08:00
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_VARINT_H
#define _BCACHEFS_VARINT_H
int bch2_varint_encode(u8 *, u64);
int bch2_varint_decode(const u8 *, const u8 *, u64 *);
bcachefs: Add safe versions of varint encode/decode This adds safe versions of bch2_varint_(encode|decode) that don't read or write past the end of the buffer, or varint being encoded. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2021-07-14 04:03:51 +08:00
int bch2_varint_encode_fast(u8 *, u64);
int bch2_varint_decode_fast(const u8 *, const u8 *, u64 *);
bcachefs: New varints Previous varint implementation used by the inode code was not nearly as fast as it could have been; partly because it was attempting to encode integers up to 96 bits (for timestamps) but this meant that encoding and decoding the length required a table lookup. Instead, we'll just encode timestamps greater than 64 bits as two separate varints; this will make decoding/encoding of inodes significantly faster overall. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2020-11-06 12:39:33 +08:00
#endif /* _BCACHEFS_VARINT_H */