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Tracking Issue for TCP_QUICKACK support on Linux #96256

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berendjan opened this issue Apr 20, 2022 · 2 comments
Open
1 of 3 tasks

Tracking Issue for TCP_QUICKACK support on Linux #96256

berendjan opened this issue Apr 20, 2022 · 2 comments
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C-tracking-issue Category: A tracking issue for an RFC or an unstable feature. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.

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@berendjan
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berendjan commented Apr 20, 2022 •
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Feature gate: #![feature(tcp_quickack)]

This is a tracking issue for linux specific socket option TCP_QUICKACK

from linux man page TCP:
"Enable quickack mode if set or disable quickack mode if
cleared. In quickack mode, acks are sent immediately,
rather than delayed if needed in accordance to normal TCP
operation. This flag is not permanent, it only enables a
switch to or from quickack mode. Subsequent operation of
the TCP protocol will once again enter/leave quickack mode
depending on internal protocol processing and factors such
as delayed ack timeouts occurring and data transfer. This
option should not be used in code intended to be portable."

Public API

// std::os::linux::net

// sealed trait, implemented for std::net::TcpStream
pub trait TcpStreamExt: Sealed{
  fn quickack(&self) -> io::Result<bool>;
  fn set_quickack(&self, quickack: bool) -> io::Result<()>;
}

Steps / History

  • Implementation:
  • Final comment period (FCP)
  • Stabilization PR

Unresolved Questions

Zulip Discussion
Windows .NET Discussion

Seems the windows API is significantly different from the Linux one to warrant a Linux specific trait.
@berendjan berendjan added C-tracking-issue Category: A tracking issue for an RFC or an unstable feature. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue. labels Apr 20, 2022
@berendjan berendjan changed the title Tracking Issue for XXX Tracking Issue for TCP_QUICKACK support on Linux Apr 20, 2022
@berendjan berendjan mentioned this issue Apr 22, 2022
Merged
Dylan-DPC added a commit to Dylan-DPC/rust that referenced this issue Jul 7, 2022
@Dylan-DPC
Rollup merge of rust-lang#96324 - berendjan:set_tcp_quickack, r=dtolnay
91a3ce8 
Add setter and getter for TCP_QUICKACK on TcpStream for Linux

Reference issue rust-lang#96256

Setting TCP_QUICKACK on TcpStream for Linux
Dylan-DPC added a commit to Dylan-DPC/rust that referenced this issue Jul 7, 2022
@Dylan-DPC
Rollup merge of rust-lang#96324 - berendjan:set_tcp_quickack, r=dtolnay
825fedd 
Add setter and getter for TCP_QUICKACK on TcpStream for Linux

Reference issue rust-lang#96256

Setting TCP_QUICKACK on TcpStream for Linux
bors added a commit to rust-lang-ci/rust that referenced this issue Aug 28, 2022
@bors
Auto merge of rust-lang#96324 - berendjan:set_tcp_quickack, r=dtolnay
ee285ea 
Add setter and getter for TCP_QUICKACK on TcpStream for Linux

Reference issue rust-lang#96256

Setting TCP_QUICKACK on TcpStream for Linux
@jmillikin jmillikin mentioned this issue Sep 18, 2022
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@jmillikin
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FYI: The same modules are also being touched as part of the work on supporting abstract socket addresses -- see #85410 and #101967 for details.

I tried to keep the code intact (merely relocated), so hopefully there won't be any major conflicts.

matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Nov 14, 2022
@matthiaskrgr
Rollup merge of rust-lang#101967 - jmillikin:linux-abstract-socket-ad…
2de7581 
…dr, r=joshtriplett

Move `unix_socket_abstract` feature API to `SocketAddrExt`.

The pre-stabilized API for abstract socket addresses exposes methods on `SocketAddr` that are only enabled for `cfg(any(target_os = "android", target_os = "linux"))`. Per discussion in <rust-lang#85410>, moving these methods to an OS-specific extension trait is required before stabilization can be considered.

This PR makes four changes:
1. The internal module `std::os::net` contains logic for the unstable feature `tcp_quickack` (rust-lang#96256). I moved that code into `linux_ext/tcp.rs` and tried to adjust the module tree so it could accommodate a second unstable feature there.
2. Moves the public API out of `impl SocketAddr`, into `impl SocketAddrExt for SocketAddr` (the headline change).
3. The existing function names and docs for `unix_socket_abstract` refer to addresses as being created from abstract namespaces, but a more accurate description is that they create sockets in *the* abstract namespace. I adjusted the function signatures correspondingly and tried to update the docs to be clearer.
4. I also tweaked `from_abstract_name` so it takes an `AsRef<[u8]>` instead of `&[u8]`, allowing `b""` literals to be passed directly.

Issues:
1. The public module `std::os::linux::net` is marked as part of `tcp_quickack`. I couldn't figure out how to mark a module as being part of two unstable features, so I just left the existing attributes in place. My hope is that this will be fixed as a side-effect of stabilizing either feature.
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Nov 14, 2022
@matthiaskrgr
Rollup merge of rust-lang#101967 - jmillikin:linux-abstract-socket-ad…
9d17459 
…dr, r=joshtriplett

Move `unix_socket_abstract` feature API to `SocketAddrExt`.

The pre-stabilized API for abstract socket addresses exposes methods on `SocketAddr` that are only enabled for `cfg(any(target_os = "android", target_os = "linux"))`. Per discussion in <rust-lang#85410>, moving these methods to an OS-specific extension trait is required before stabilization can be considered.

This PR makes four changes:
1. The internal module `std::os::net` contains logic for the unstable feature `tcp_quickack` (rust-lang#96256). I moved that code into `linux_ext/tcp.rs` and tried to adjust the module tree so it could accommodate a second unstable feature there.
2. Moves the public API out of `impl SocketAddr`, into `impl SocketAddrExt for SocketAddr` (the headline change).
3. The existing function names and docs for `unix_socket_abstract` refer to addresses as being created from abstract namespaces, but a more accurate description is that they create sockets in *the* abstract namespace. I adjusted the function signatures correspondingly and tried to update the docs to be clearer.
4. I also tweaked `from_abstract_name` so it takes an `AsRef<[u8]>` instead of `&[u8]`, allowing `b""` literals to be passed directly.

Issues:
1. The public module `std::os::linux::net` is marked as part of `tcp_quickack`. I couldn't figure out how to mark a module as being part of two unstable features, so I just left the existing attributes in place. My hope is that this will be fixed as a side-effect of stabilizing either feature.
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Nov 14, 2022
@matthiaskrgr
Rollup merge of rust-lang#101967 - jmillikin:linux-abstract-socket-ad…
9f3786b 
…dr, r=joshtriplett

Move `unix_socket_abstract` feature API to `SocketAddrExt`.

The pre-stabilized API for abstract socket addresses exposes methods on `SocketAddr` that are only enabled for `cfg(any(target_os = "android", target_os = "linux"))`. Per discussion in <rust-lang#85410>, moving these methods to an OS-specific extension trait is required before stabilization can be considered.

This PR makes four changes:
1. The internal module `std::os::net` contains logic for the unstable feature `tcp_quickack` (rust-lang#96256). I moved that code into `linux_ext/tcp.rs` and tried to adjust the module tree so it could accommodate a second unstable feature there.
2. Moves the public API out of `impl SocketAddr`, into `impl SocketAddrExt for SocketAddr` (the headline change).
3. The existing function names and docs for `unix_socket_abstract` refer to addresses as being created from abstract namespaces, but a more accurate description is that they create sockets in *the* abstract namespace. I adjusted the function signatures correspondingly and tried to update the docs to be clearer.
4. I also tweaked `from_abstract_name` so it takes an `AsRef<[u8]>` instead of `&[u8]`, allowing `b""` literals to be passed directly.

Issues:
1. The public module `std::os::linux::net` is marked as part of `tcp_quickack`. I couldn't figure out how to mark a module as being part of two unstable features, so I just left the existing attributes in place. My hope is that this will be fixed as a side-effect of stabilizing either feature.
thomcc pushed a commit to tcdi/postgrestd that referenced this issue Feb 10, 2023
@matthiaskrgr
Rollup merge of #101967 - jmillikin:linux-abstract-socket-addr, r=jos…
970909c 
…htriplett

Move `unix_socket_abstract` feature API to `SocketAddrExt`.

The pre-stabilized API for abstract socket addresses exposes methods on `SocketAddr` that are only enabled for `cfg(any(target_os = "android", target_os = "linux"))`. Per discussion in <rust-lang/rust#85410>, moving these methods to an OS-specific extension trait is required before stabilization can be considered.

This PR makes four changes:
1. The internal module `std::os::net` contains logic for the unstable feature `tcp_quickack` (rust-lang/rust#96256). I moved that code into `linux_ext/tcp.rs` and tried to adjust the module tree so it could accommodate a second unstable feature there.
2. Moves the public API out of `impl SocketAddr`, into `impl SocketAddrExt for SocketAddr` (the headline change).
3. The existing function names and docs for `unix_socket_abstract` refer to addresses as being created from abstract namespaces, but a more accurate description is that they create sockets in *the* abstract namespace. I adjusted the function signatures correspondingly and tried to update the docs to be clearer.
4. I also tweaked `from_abstract_name` so it takes an `AsRef<[u8]>` instead of `&[u8]`, allowing `b""` literals to be passed directly.

Issues:
1. The public module `std::os::linux::net` is marked as part of `tcp_quickack`. I couldn't figure out how to mark a module as being part of two unstable features, so I just left the existing attributes in place. My hope is that this will be fixed as a side-effect of stabilizing either feature.
@devnexen
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The following PR proposes to stabilise the tcp_quickack feature, being present since 2yrs+ now.

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