Commits on Sep 21, 2023

1. maintenance(systemd): support the Windows Subsystem for Linux …

   When running in the Windows Subsystem for Linux (WSL), it is usually
   necessary to use the Git Credential Manager for authentication when
   performing the background fetches.
   
   This requires interoperability between the Windows Subsystem for Linux
   and the Windows host to work, which uses so-called vsocks, i.e. sockets
   intended for communcations between virtual machines and the host they
   are running on.
   
   However, when Git is configured to run background maintenance via
   `systemd`, the address families available to those maintenance processes
   are restricted, and did not include `AF_VSOCK`. This leads to problems
   e.g. when a background fetch tries to access github.com:
   
   	systemd[437]: Starting Optimize Git repositories data...
   	git[747387]: WSL (747387) ERROR: UtilBindVsockAnyPort:285: socket failed 97
   	git[747381]: fatal: could not read Username for 'https://github.com': No such device or address
   	git[747381]: error: failed to prefetch remotes
   	git[747381]: error: task 'prefetch' failed
   	systemd[437]: git-maintenance@hourly.service: Main process exited, code=exited, status=1/FAILURE
   	systemd[437]: git-maintenance@hourly.service: Failed with result 'exit-code'.
   	systemd[437]: Failed to start Optimize Git repositories data.
   
   Address this (pun intended) by adding the `AF_VSOCK` address family to
   the allow list.
   
   This fixes microsoft#604, and is a
   backport of 5e8515e (maintenance(systemd): support the Windows
   Subsystem for Linux, 2023-09-10).
   
   Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

   

   dscho committed Sep 21, 2023
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