fs/smb/common/compress/compress.h

File Facts

System

Linux kernel

Corpus path

fs/smb/common/compress/compress.h

Extension

.h

Size

824 bytes

Lines

29

Domain

Core OS

Bucket

VFS And Filesystem Core

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

• ../smb2pdu.h

Detected Declarations

• function Copyright

Annotated Snippet

#ifndef _COMMON_SMB_COMPRESS_H
#define _COMMON_SMB_COMPRESS_H

#include "../smb2pdu.h"

/*
 * SMB3_COMPRESS_NONE is valid only in chained payload headers. It is never
 * negotiated as a compression algorithm.
 */
static __always_inline bool smb_compress_alg_valid(__le16 alg, bool valid_none)
{
	if (alg == SMB3_COMPRESS_NONE)
		return valid_none;

	return alg == SMB3_COMPRESS_LZ77 || alg == SMB3_COMPRESS_PATTERN;
}

int smb_compression_decompress(__le16 alg, bool allow_chained,
			       const void *src, u32 slen, void *dst, u32 dlen);
int smb_compression_compress_chained(__le16 alg, bool allow_pattern,
				     const void *src, u32 slen,
				     void *dst, u32 *dlen);

#endif /* _COMMON_SMB_COMPRESS_H */

Annotation

• Immediate include surface: `../smb2pdu.h`.
• Detected declarations: `function Copyright`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.