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Krzysztof kuhy Rudnicki
694c013b6b
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Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
68 lines
3.0 KiB
Bash
68 lines
3.0 KiB
Bash
#!/bin/bash
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# ============================================================================
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# vmbox: `vm hibernate-setup <name>` -- make a sandbox able to hibernate and
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# resume. Overlay only: the sealed base is never rebuilt for this, because
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# `vm build --force` re-seals a new checksum under every existing sandbox.
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# ============================================================================
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# shellcheck source=common.sh
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source "$(dirname "${BASH_SOURCE[0]}")/common.sh"
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# shellcheck source=launch.sh
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source "$(dirname "${BASH_SOURCE[0]}")/launch.sh"
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# shellcheck source=ssh.sh
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source "$(dirname "${BASH_SOURCE[0]}")/ssh.sh"
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readonly HIBERNATE_GUEST_SCRIPT="/var/tmp/vmbox-hibernate-setup.sh"
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readonly HIBERNATE_X11_PROFILE="/var/tmp/vmbox-x11.sh"
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_hibernate_boot() {
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local name="$1"
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launch_vm "$name" >/dev/null
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vm_wait_ssh "$name" 150 || die "sandbox '$name' did not become reachable"
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}
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# Clean poweroff, then wait for qemu to go. Not `vm run`: its exit-code
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# recovery would boot the guest again behind our back.
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_hibernate_poweroff() {
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local name="$1" waited=0
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vm_ssh_exec "$name" 'sudo systemctl poweroff' </dev/null >/dev/null 2>&1 || true
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while vm_is_running "$name" && (( waited < 90 )); do
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sleep 1; waited=$(( waited + 1 ))
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done
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vm_is_running "$name" && die "sandbox '$name' did not power off within 90s"
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return 0
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}
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cmd_hibernate_setup() {
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local name swap_mb=0
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name="$(validate_vm_name "${1:-}")"; shift || true
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require_vm "$name"
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if [[ "${1:-}" == --swap-mb ]]; then
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swap_mb="${2:-}"; [[ "$swap_mb" =~ ^[0-9]+$ ]] || die "--swap-mb needs MiB"
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fi
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vm_is_running "$name" || _hibernate_boot "$name"
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vm_scp_to "$name" "$VMBOX_GUEST_DIR/hibernate-setup.sh" "$HIBERNATE_GUEST_SCRIPT" ||
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die "could not copy the setup script in"
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vm_scp_to "$name" "$VMBOX_GUEST_DIR/vmbox-x11.sh" "$HIBERNATE_X11_PROFILE" ||
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die "could not copy vmbox-x11.sh in"
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vm_ssh_exec "$name" "sudo bash $HIBERNATE_GUEST_SCRIPT $swap_mb $HIBERNATE_X11_PROFILE" </dev/null ||
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die "hibernate setup failed in the guest"
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# The cmdline only takes effect on the next boot.
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log "Rebooting '$name' so the new kernel cmdline applies"
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_hibernate_poweroff "$name"
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_hibernate_boot "$name"
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# Prove it rather than assume it: the running kernel carries the resume
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# args (and no-kvmclock, so a resume reads the RTC), and logind (what
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# `systemctl hibernate` asks) says yes.
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vm_ssh_exec "$name" 'grep -q "resume_offset=.*no-kvmclock" /proc/cmdline' </dev/null ||
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die "the guest booted without resume_offset=/no-kvmclock on its cmdline"
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local can
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# sudo: polkit denies CanHibernate to a non-seat ssh session.
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can="$(vm_ssh_exec "$name" 'sudo busctl call org.freedesktop.login1 /org/freedesktop/login1 org.freedesktop.login1.Manager CanHibernate' </dev/null)"
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[[ "$can" == 's "yes"' ]] || die "logind CanHibernate says: ${can:-nothing}"
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ok "'$name' can hibernate and resume (logind CanHibernate=yes)"
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}
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