10121b154SNamjae Jeon /* SPDX-License-Identifier: GPL-2.0-only */
20121b154SNamjae Jeon /*
30121b154SNamjae Jeon * Copyright (C) 2026 Namjae Jeon <linkinjeon@kernel.org>
40121b154SNamjae Jeon */
50121b154SNamjae Jeon #ifndef _COMMON_SMB_COMPRESS_H
60121b154SNamjae Jeon #define _COMMON_SMB_COMPRESS_H
70121b154SNamjae Jeon
80121b154SNamjae Jeon #include "../smb2pdu.h"
90121b154SNamjae Jeon
100121b154SNamjae Jeon /*
110121b154SNamjae Jeon * SMB3_COMPRESS_NONE is valid only in chained payload headers. It is never
120121b154SNamjae Jeon * negotiated as a compression algorithm.
130121b154SNamjae Jeon */
smb_compress_alg_valid(__le16 alg,bool valid_none)140121b154SNamjae Jeon static __always_inline bool smb_compress_alg_valid(__le16 alg, bool valid_none)
150121b154SNamjae Jeon {
160121b154SNamjae Jeon if (alg == SMB3_COMPRESS_NONE)
170121b154SNamjae Jeon return valid_none;
180121b154SNamjae Jeon
190121b154SNamjae Jeon return alg == SMB3_COMPRESS_LZ77 || alg == SMB3_COMPRESS_PATTERN;
200121b154SNamjae Jeon }
210121b154SNamjae Jeon
226234f501SNamjae Jeon int smb_compression_decompress(__le16 alg, bool allow_chained,
23*0710dd08SAnatolii Shumak bool allow_pattern, const void *src, u32 slen,
24*0710dd08SAnatolii Shumak void *dst, u32 dlen);
256234f501SNamjae Jeon int smb_compression_compress_chained(__le16 alg, bool allow_pattern,
266234f501SNamjae Jeon const void *src, u32 slen,
276234f501SNamjae Jeon void *dst, u32 *dlen);
286234f501SNamjae Jeon
290121b154SNamjae Jeon #endif /* _COMMON_SMB_COMPRESS_H */
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