[PATCH 0/8] Change serial getty instances dynamically

[Alyssa Ross <hi@alyssa.is>]

The host system is supposed to provide a shell on whatever serial
devices are configured as the active kernel consoles.  Previously, the
system made the assumption that the active console would never change
after boot, but in reality devices can be added and removed later than
that.  One situation in which this happened is when a serial device
was configured whose driver was not built in to the kernel, but loaded
as a module after the console was checked by rc.init.

This series fixes that by creating and destroying instances of the
serial-getty service whenever the active kernel consoles change, and
adds a regression test.  Since this is the second test that involves
running a full Spectrum system in a VM, most of the series has ended
up being refactoring the first such test, so that code can be shared
with this new one.

Yureka, I don't know whether this is the issue you were encountering
when you tried debugging the Weston issue over serial, but maybe worth
a try?  I suspect not though, because if I recall correctly you
weren't even getting kernel logs?  This was the only issue I could
find trying to reproduce the problem in QEMU.

Alyssa Ross (8):
  host/rootfs: poll active consoles for serial getty
  release/checks/integration: init from networking
  release/checks/integration: use default Meson timeout
  release/checks/integration: extract config struct
  release/checks/integration: run from tmpdir
  release/checks/integration: name QEMU arg pointers
  release/checks/integration: extract library
  release/checks/integration: test late serial

 host/rootfs/Makefile                          |   1 +
 host/rootfs/default.nix                       |   8 +-
 .../service/serial-getty-generator/run        |  43 +++
 host/rootfs/etc/s6-linux-init/scripts/rc.init |   9 -
 release/checks/default.nix                    |   4 +-
 release/checks/integration/default.nix        |  88 +++++
 release/checks/integration/late-serial.c      |  15 +
 release/checks/integration/lib.c              | 221 ++++++++++++
 release/checks/integration/lib.h              |  20 ++
 release/checks/integration/meson.build        |  21 ++
 release/checks/integration/meson_options.txt  |   6 +
 release/checks/integration/networking.c       | 138 +++++++
 release/checks/networking/default.nix         |  62 ----
 release/checks/networking/test.c              | 337 ------------------
 release/checks/pkg-tests.nix                  |   2 +-
 15 files changed, 560 insertions(+), 415 deletions(-)
 create mode 100755 host/rootfs/etc/s6-linux-init/run-image/service/serial-getty-generator/run
 create mode 100644 release/checks/integration/default.nix
 create mode 100644 release/checks/integration/late-serial.c
 create mode 100644 release/checks/integration/lib.c
 create mode 100644 release/checks/integration/lib.h
 create mode 100644 release/checks/integration/meson.build
 create mode 100644 release/checks/integration/meson_options.txt
 create mode 100644 release/checks/integration/networking.c
 delete mode 100644 release/checks/networking/default.nix
 delete mode 100644 release/checks/networking/test.c


base-commit: 42887a0331fd058ee0930fd5209fc3265565c3a8
-- 
2.49.0