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tcpip.Endpoint.Write() doc is out of date #6024

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bemasc opened this issue May 19, 2021 · 5 comments
Open

tcpip.Endpoint.Write() doc is out of date #6024

bemasc opened this issue May 19, 2021 · 5 comments
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area: networking good first issue type: bug

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@bemasc
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@bemasc bemasc commented May 19, 2021

The doc says

	// Unlike io.Writer.Write, Endpoint.Write transfers ownership of any bytes
	// successfully written to the Endpoint. That is, if a call to
	// Write(SlicePayload{data}) returns (n, err), it may retain data[:n], and
	// the caller should not use data[:n] after Write returns.

but the signature of Write has since changed. It no longer accepts a slice payload, so this advice is no longer applicable.
@ianlewis
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@ianlewis ianlewis commented May 20, 2021

For posterity the comment in question is here:

gvisor/pkg/tcpip/tcpip.go

Lines 506 to 509 in b8b43f7

// Unlike io.Writer.Write, Endpoint.Write transfers ownership of any bytes
// successfully written to the Endpoint. That is, if a call to
// Write(SlicePayload{data}) returns (n, err), it may retain data[:n], and
// the caller should not use data[:n] after Write returns.

@himanshu007-creator
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@himanshu007-creator himanshu007-creator commented May 27, 2021

hi i would like to work on this issue. But i wanted to ask, Do we have to update L508 or simply remove it?
if update then with what.
thanks

@himanshu007-creator
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@himanshu007-creator himanshu007-creator commented Jun 23, 2021

@ianlewis 👀

@milantracy
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@milantracy milantracy commented Aug 31, 2021

imo you have to update the comment.

From the implementations[0][1] of the interface, the behavior is still valid

[0] https://github.com/google/gvisor/blob/master/pkg/tcpip/transport/tcp/endpoint.go#L1563
[1] https://github.com/google/gvisor/blob/master/pkg/tcpip/transport/udp/endpoint.go#L430

@namit-chandwani
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@namit-chandwani namit-chandwani commented Oct 1, 2021 •
edited

Hey @ianlewis, I'd like to work on this issue. Can you please assign it to me?

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@ianlewis @bemasc @milantracy @namit-chandwani @himanshu007-creator