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passt/test/lib/setup_ugly
Stefano Brivio 40fc9e6e7b test: Add memory/passt test cases
These show a summary of memory usage in kernel and userspace with
different port forwarding configurations, details of userspace usage
using 'nm' (passt only uses statically allocated memory), and details
of kernel memory from slab reporting facilities.

This adds a new test image, mbuto.mem.img, with harcoded IPv4 and
IPv6 addresses and routes, and just the tools we need to start and
stop passt, to report from /proc/slabinfo, /proc/meminfo, and to
print and parse symbol sizes using nm(1).

passt can't pivot_root() for sandboxing purposes on ramfs, so we need
to create another filesystem and chroot into it, first.

We don't want to use pane context functions, as we're checking memory
usage for sockets: resort to screen-scraping.

Configure a dummy interface to provide passt with an appearance of
working IPv4 and IPv6 connectivity, contributed by David.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
2022-11-04 12:01:27 +01:00

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#!/bin/sh
#
# SPDX-License-Identifier: AGPL-3.0-or-later
#
# PASST - Plug A Simple Socket Transport
# for qemu/UNIX domain socket mode
#
# PASTA - Pack A Subtle Tap Abstraction
# for network namespace/tap device mode
#
# test/lib/setup_ugly - Setup functions using screen-scraping instead of context
#
# Copyright (c) 2022 Red Hat GmbH
# Author: Stefano Brivio <sbrivio@redhat.com>
INITRAMFS_MEM="${BASEPATH}/mbuto.mem.img"
# setup_distro() - Set up pane layout for distro tests
setup_distro() {
layout_host
}
# setup_pasta_options() - Set up layout and host context without starting pasta
setup_pasta_options() {
context_setup_host host
layout_pasta_simple
}
# setup_memory() - Start qemu in guest pane, and passt in passt context
setup_memory() {
layout_memory
pane_or_context_run guest 'qemu-system-$(uname -m)' \
' -machine accel=kvm' \
' -m '${VMEM}' -cpu host -smp '${VCPUS} \
' -kernel ' "/boot/vmlinuz-$(uname -r)" \
' -initrd '${INITRAMFS_MEM}' -nographic -serial stdio' \
' -nodefaults' \
' -append "console=ttyS0 mitigations=off apparmor=0"' \
" -pidfile ${STATESETUP}/qemu.pid"
}
# teardown_distro() - Nothing to do, yet
teardown_distro() {
:
}
# teardown_pasta_options() - Tear down pasta and host context, no namespace
teardown_pasta_options() {
teardown_context_watch ${PANE_HOST} host
teardown_context_watch ${PANE_PASST} passt
}
# teardown_passt() - Kill qemu with ^C, remove passt PID file
teardown_memory() {
kill $(cat "${STATESETUP}/qemu.pid")
}