FileUtils.install fails with text files in a docker container under Kernel 6.8-rc5 with a Errno::ENOTSUP error..

[satmandu]

When in a docker container on an x86_64 host system under kernel 6.8.0-rc5, the following fails:

chronos@mbp113-x86_64 /tmp $ echo "test" > test
chronos@mbp113-x86_64 /tmp $ irb
irb(main):001> FileUtils.install 'test', 'dira/'
/usr/local/lib64/ruby/3.3.0/fileutils.rb:2280:in `copy_stream': Operation not supported - copy_file_range (Errno::ENOTSUP)
        from /usr/local/lib64/ruby/3.3.0/fileutils.rb:2280:in `block (2 levels) in copy_file'
        from /usr/local/lib64/ruby/3.3.0/fileutils.rb:2279:in `open'
        from /usr/local/lib64/ruby/3.3.0/fileutils.rb:2279:in `block in copy_file'
        from /usr/local/lib64/ruby/3.3.0/fileutils.rb:2278:in `open'
        from /usr/local/lib64/ruby/3.3.0/fileutils.rb:2278:in `copy_file'                                                       from /usr/local/lib64/ruby/3.3.0/fileutils.rb:1078:in `copy_file'
        from /usr/local/lib64/ruby/3.3.0/fileutils.rb:1629:in `block in install'
        from /usr/local/lib64/ruby/3.3.0/fileutils.rb:2469:in `block in fu_each_src_dest'
        from /usr/local/lib64/ruby/3.3.0/fileutils.rb:2485:in `fu_each_src_dest0'
        from /usr/local/lib64/ruby/3.3.0/fileutils.rb:2467:in `fu_each_src_dest'
        from /usr/local/lib64/ruby/3.3.0/fileutils.rb:1623:in `install'
        from (irb):1:in `<main>'
        from <internal:kernel>:187:in `loop'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/irb-1.11.0/exe/irb:9:in `<top (required)>'
        from /usr/local/bin/irb:25:in `load'
        from /usr/local/bin/irb:25:in `<main>'
irb(main):002>

Reproducer container:

docker run --platform linux/amd64 --rm --net=host  -v $(pwd):/output -h $(hostname)-x86_64 -it satmandu/crewbuild:nocturne-x86_64.m90

Docker version info:

docker version
Client: Docker Engine - Community
 Version:           25.0.3
 API version:       1.44
 Go version:        go1.21.6
 Git commit:        4debf41
 Built:             Tue Feb  6 21:14:22 2024
 OS/Arch:           linux/amd64
 Context:           default

Server: Docker Engine - Community
 Engine:
  Version:          25.0.3
  API version:      1.44 (minimum version 1.24)
  Go version:       go1.21.6
  Git commit:       f417435
  Built:            Tue Feb  6 21:14:22 2024
  OS/Arch:          linux/amd64
  Experimental:     true
 containerd:
  Version:          1.6.28                                                                                                GitCommit:        ae07eda36dd25f8a1b98dfbf587313b99c0190bb
 runc:
  Version:          1.1.12                                                                                                GitCommit:        v1.1.12-0-g51d5e94
 docker-init:
  Version:          0.19.0                                                                                                GitCommit:        de40ad0

When I am booted into kernel 6.7.5, I don't have any issues. (I have reproduced this on two machines.)

This is an issue even if I manually do a gem install fileutils first:

chronos@mbp113-x86_64 /usr/local/lib/crew/packages $ ruby --version                                                     ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [x86_64-linux-gnu]                                                          chronos@mbp113-x86_64 /usr/local/lib/crew/packages $ gem install fileutils                                              Fetching fileutils-1.7.2.gem                                                                                            Successfully installed fileutils-1.7.2
1 gem installed
chronos@mbp113-x86_64 /usr/local/lib/crew/packages $ cd /tmp
chronos@mbp113-x86_64 /tmp $ echo 'test' > test
chronos@mbp113-x86_64 /tmp $ irb
irb(main):001> require 'fileutils'
=> false
irb(main):002> FileUtils.install 'test', 'dira/'
/usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:2280:in `copy_stream': Operation not supported - copy_file_range (Errno::ENOTSUP)
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:2280:in `block (2 levels) in copy_file'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:2279:in `open'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:2279:in `block in copy_file'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:2278:in `open'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:2278:in `copy_file'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:1078:in `copy_file'                 [
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:1629:in `block in install'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:2469:in `block in fu_each_src_dest'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:2485:in `fu_each_src_dest0'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:2467:in `fu_each_src_dest'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/fileutils-1.7.2/lib/fileutils.rb:1623:in `install'
        from (irb):2:in `<main>'
        from <internal:kernel>:187:in `loop'
        from /usr/local/lib64/ruby/gems/3.3.0/gems/irb-1.11.0/exe/irb:9:in `<top (required)>'
        from /usr/local/bin/irb:25:in `load'
        from /usr/local/bin/irb:25:in `<main>'
irb(main):003>  

[satmandu]

It looks like there were some changes to copy_file_range in kernel 6.8... but that should not affect userspace apps...

Hmmm... maybe I need to open an issue with OpenZFS since I have an underlying zfs filesystem...

[satmandu]

Looks like this is an OpenZFS issue.