TODO: consolidate nspawn items

Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>

TODO

@@ -409,12 +409,6 @@ Features:
   ID from it securely. This would then allow us to bind secrets a specific
   system securely.
 
-* nspawn: maybe allow TPM passthrough, backed by swtpm, and measure --image=
-  hash into its PCR 11, so that nspawn instances can be TPM enabled, and
-  partake in measurements/remote attestation and such. swtpm would run outside
-  of control of container, and ideally would itself bind its encryption keys to
-  host TPM.
-
 * tree-wide: convert as much as possible over to use sd_event_set_signal_exit(), instead
   of manually hooking into SIGINT/SIGTERM
 
@@ -827,11 +821,6 @@ Features:
   multiple versions are around of the same resource, show which ones. (in other
   words: show partition labels).
 
-* systemd-nspawn: make boot assessment do something sensible in a
-  container. i.e send an sd_notify() from payload to container manager once
-  boot-up is completed successfully, and use that in nspawn for dealing with
-  boot counting, implemented in the partition table labels and directory names.
-
 * maybe add a generator that reads /proc/cmdline, looks for
   systemd.pull-raw-portable=, systemd-pull-raw-sysext= and similar switches
   that take an URL as parameter. It then generates service units for
@@ -897,9 +886,6 @@ Features:
 * cryptsetup/homed: implement TOTP authentication backed by TPM2 and its
   internal clock.
 
-* nspawn: optionally set up nftables/iptables routes that forward UDP/TCP
-  traffic on port 53 to resolved stub 127.0.0.54
-
 * man: rework os-release(5), and clearly separate our extension-release.d/ and
   initrd-release parts, i.e. list explicitly which fields are about what.
 
@@ -1003,10 +989,6 @@ Features:
   for /home/, and similar. Similar add --image-dissect-policy= to tools that
   take --image= that take the same short string.
 
-* nspawn: maybe optionally insert .nspawn file as GPT partition into images, so
-  that such container images are entirely stand-alone and can be updated as
-  one.
-
 * we probably should extend the root verity hash of the root fs into some PCR
   on boot. (i.e. maybe add a veritytab option tpm2-measure=12 or so to measure
   it into PCR 12); Similar: we probably should extend the LUKS volume key of
@@ -2220,13 +2202,34 @@ Features:
     PID 1...
   - optionally automatically add FORWARD rules to iptables whenever nspawn is
     running, remove them when shut down.
-
+  - add support for sysext extensions, too. i.e. a new --extension= switch that
-* nspawn: add support for sysext extensions, too. i.e. a new --extension=
+    takes one or more arguments, and applies the extensions already during
-  switch that takes one or more arguments, and applies the extensions already
+    startup.
-  during startup.
+  - when main nspawn supervisor process gets suspended due to SIGSTOP/SIGTTOU
-
+    or so, freeze the payload too.
-* when main nspawn supervisor process gets suspended due to SIGSTOP/SIGTTOU or
+  - support time namespaces
-  so, freeze the payload too.
+  - on cgroupsv1 issue cgroup empty handler process based on host events, so
+    that we make cgroup agent logic safe
+  - add API to invoke binary in container, then use that as fallback in
+    "machinectl shell"
+  - make nspawn suitable for shell pipelines: instead of triggering a hangup
+    when input is finished, send ^D, which synthesizes an EOF. Then wait for
+    hangup or ^D before passing on the EOF.
+  - greater control over selinux label?
+  - support that /proc, /sys/, /dev are pre-mounted
+  - maybe allow TPM passthrough, backed by swtpm, and measure --image= hash
+    into its PCR 11, so that nspawn instances can be TPM enabled, and partake
+    in measurements/remote attestation and such. swtpm would run outside of
+    control of container, and ideally would itself bind its encryption keys to
+    host TPM.
+  - make boot assessment do something sensible in a container. i.e send an
+    sd_notify() from payload to container manager once boot-up is completed
+    successfully, and use that in nspawn for dealing with boot counting,
+    implemented in the partition table labels and directory names.
+  - optionally set up nftables/iptables routes that forward UDP/TCP traffic on
+    port 53 to resolved stub 127.0.0.54
+  - maybe optionally insert .nspawn file as GPT partition into images, so that
+    such container images are entirely stand-alone and can be updated as one.
 
 * machined: add API to acquire UID range. add API to mount/dissect loopback
   file. Both protected by PK. Then make nspawn use these APIs to run
@@ -2234,22 +2237,6 @@ Features:
   so that the client side can remain entirely unprivileged, with SUID or
   anything like that.
 
-* nspawn: support time namespaces
-
-* nspawn: on cgroupsv1 issue cgroup empty handler process based on host events,
-  so that we make cgroup agent logic safe
-
-* nspawn/machined: add API to invoke binary in container, then use that as
-  fallback in "machinectl shell"
-
-* nspawn: make nspawn suitable for shell pipelines: instead of triggering a
-  hangup when input is finished, send ^D, which synthesizes an EOF. Then wait
-  for hangup or ^D before passing on the EOF.
-
-* nspawn: greater control over selinux label?
-
-* nspawn: support that /proc, /sys/, /dev are pre-mounted
-
 * machined:
   - add an API so that libvirt-lxc can inform us about network interfaces being
     removed or added to an existing machine