Feature/zero copy

[afiffon]

No description provided.

[Copilot]

Pull Request Overview

This PR implements zero-copy I/O operations for the SMB client by introducing an IoVec abstraction that can hold both owned and shared buffer references. This reduces memory allocations and copying during data transfers.

Key changes:

• Introduces IoVec and IoVecBuf types for zero-copy buffer management
• Refactors message signing, encryption, and transport layers to work with IoVec
• Adds progress reporting capabilities to file copy operations

Reviewed Changes

Copilot reviewed 28 out of 29 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
crates/smb/src/util/iovec.rs	New module defining IoVec and IoVecBuf for zero-copy buffer management
crates/smb/src/util.rs	Module declaration for iovec utilities
crates/smb/src/session/signer.rs	Updated to use IoVec instead of &[u8] for message signing
crates/smb/src/session/encryptor_decryptor.rs	Modified encryption to work with IoVec
crates/smb/src/resource/pipe.rs	Updated to use zero-copy outgoing messages
crates/smb/src/resource/file_util.rs	Added progress reporting and visibility improvements to copy operations
crates/smb/src/resource/file.rs	Added zero-copy write methods
crates/smb/src/resource.rs	Added sendo_recvo method for zero-copy message handling
crates/smb/src/msg_handler.rs	Updated message structures to support IoVec and additional data
crates/smb/src/connection/transformer.rs	Refactored to use IoVec throughout transformation pipeline
crates/smb/src/connection/transport/traits.rs	Updated transport layer to send IoVec data
crates/smb-msg/src/file.rs	Modified WriteRequest to support zero-copy operations
crates/smb-cli/src/copy.rs	Enhanced with progress bar support for file operations

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[Copilot]

The variable name 'signture_backup' contains a typo. It should be 'signature_backup'.

[Copilot]

The documentation comment has inconsistent capitalization. Sentences should start with capital letters: 'Pass the return value to start_parallel_copy to start the copy. This is mostly useful for cases that require an additional interaction with the state, beyond the copy workers themselves - for example, reporting progress. If you don't need that, just use the [block_copy] function directly.'

Suggested change

	/// pass the return value to start_parallel_copy to start the copy.
	///
	/// this is mostly useful for cases that require an additional interaction with the
	/// state, beyond the copy workers themselves - for example, reporting progress.
	/// if you don't need that, just use the [`block_copy`] function directly.
	/// Pass the return value to start_parallel_copy to start the copy.
	///
	/// This is mostly useful for cases that require an additional interaction with the
	/// state, beyond the copy workers themselves - for example, reporting progress.
	/// If you don't need that, just use the [`block_copy`] function directly.

[Copilot]

The documentation comment has inconsistent punctuation. It should end with a period: '- To report progress, use the [prepare_parallel_copy] function to get a CopyState, and then use that to report progress while the copy is running.'