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os: ReadDir fails on file systems without File ID support on Windows [1.21 backport] #61910

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gopherbot opened this issue Aug 9, 2023 · 7 comments
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os: ReadDir fails on file systems without File ID support on Windows [1.21 backport] #61910

gopherbot opened this issue Aug 9, 2023 · 7 comments
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CherryPickApproved Used during the release process for point releases FrozenDueToAge OS-Windows release-blocker
Milestone
Go1.21.1

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@gopherbot
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@bcmills requested issue #61907 to be considered for backport to the next 1.21 minor release.

@gopherbot, please backport to Go 1.21. This is a significant regression in ReadDir.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Aug 9, 2023
@gopherbot gopherbot mentioned this issue Aug 9, 2023
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@gopherbot gopherbot added this to the Go1.21.1 milestone Aug 9, 2023
@gopherbot
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Change https://go.dev/cl/518196 mentions this issue: os: support file systems without file IDs when reading directories on windows

@hajimehoshi hajimehoshi changed the title os: ReadDir fails for UNC paths shared with Windows using Parallels [1.21 backport] os: ReadDir fails on file systems without File ID support on Windows [1.21 backport] Aug 10, 2023
@dmitshur
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This is a significant regression in ReadDir.

@bcmills Can you please provide a more detailed rationale for this backport? Thanks.

@dmitshur
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dmitshur commented Aug 16, 2023 •
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@aclements suggests a possible alternative path of reverting the optimization (if viable) and then applying the stronger fix for Go 1.22 only.

@dmitshur dmitshur added the WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. label Aug 16, 2023
@gopherbot
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Change https://go.dev/cl/520156 mentions this issue: [release-branch.go1.21] Revert "os: use handle based APIs to read directories on windows"

@bcmills
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bcmills commented Aug 16, 2023

Can you please provide a more detailed rationale for this backport? Thanks.

Without some kind of backport fix, calling Readdir or ReadDir fails for an os.File representing a directory in certain filesystems (notably SMB shares). That breaks a number of tools, including cmd/go in some cases (see the original report in #61907).

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bcmills commented Aug 16, 2023

@aclements Suggests a possible alternative path of reverting the optimization (if viable)

It looks like it is feasible to revert: https://go.dev/cl/520156 required a couple of non-trivial merge resolutions but overall seems to apply fairly cleanly.

@bcmills bcmills removed the WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. label Aug 16, 2023
@cagedmantis cagedmantis added the CherryPickApproved Used during the release process for point releases label Aug 23, 2023
@gopherbot gopherbot removed the CherryPickCandidate Used during the release process for point releases label Aug 23, 2023
@cagedmantis cagedmantis mentioned this issue Aug 23, 2023
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gopherbot pushed a commit that referenced this issue Aug 23, 2023
@cagedmantis
[release-branch.go1.21] Revert "os: use handle based APIs to read dir…
7c97cc7 
…ectories on windows"

This reverts CL 452995.

Reason for revert: caused os.File.ReadDir to fail on
filesystems that do not support FILE_ID_BOTH_DIR_INFO.

This is an alternative to a fix-forward change in CL 518196.
Since the original change was mostly a performance improvement,
reverting to the previous implementation seems less risky than
backporting a larger fix.

Fixes #61910
Fixes #61964

Change-Id: I60f1602b9eb6ea353e7eb23429f19f1ffa16b394
Reviewed-on: https://go-review.googlesource.com/c/go/+/520156
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
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Closed by merging 7c97cc7 to release-branch.go1.21.

awly pushed a commit to tailscale/go that referenced this issue Feb 7, 2024
@awly
[release-branch.go1.21] Revert "os: use handle based APIs to read dir…
8c3391a 
…ectories on windows"

This reverts CL 452995.

Reason for revert: caused os.File.ReadDir to fail on
filesystems that do not support FILE_ID_BOTH_DIR_INFO.

This is an alternative to a fix-forward change in CL 518196.
Since the original change was mostly a performance improvement,
reverting to the previous implementation seems less risky than
backporting a larger fix.

Fixes golang#61910
Fixes golang#61964

Change-Id: I60f1602b9eb6ea353e7eb23429f19f1ffa16b394
Reviewed-on: https://go-review.googlesource.com/c/go/+/520156
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
JanDeDobbeleer pushed a commit to JanDeDobbeleer/go that referenced this issue Feb 12, 2024
@JanDeDobbeleer
[release-branch.go1.21] Revert "os: use handle based APIs to read dir…
1fc27a3 
…ectories on windows"

This reverts CL 452995.

Reason for revert: caused os.File.ReadDir to fail on
filesystems that do not support FILE_ID_BOTH_DIR_INFO.

This is an alternative to a fix-forward change in CL 518196.
Since the original change was mostly a performance improvement,
reverting to the previous implementation seems less risky than
backporting a larger fix.

Fixes golang#61910
Fixes golang#61964

Change-Id: I60f1602b9eb6ea353e7eb23429f19f1ffa16b394
Reviewed-on: https://go-review.googlesource.com/c/go/+/520156
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
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