3052 lines
154 KiB
Markdown
3052 lines
154 KiB
Markdown
---
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title: TODO
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category: Contributing
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layout: default
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SPDX-License-Identifier: LGPL-2.1-or-later
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---
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# TODO
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## Bugfixes
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- Many manager configuration settings that are only applicable to user
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manager or system manager can be always set. It would be better to reject
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them when parsing config.
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- Jun 01 09:43:02 krowka systemd[1]: Unit user@1000.service has alias user@.service.
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Jun 01 09:43:02 krowka systemd[1]: Unit user@6.service has alias user@.service.
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Jun 01 09:43:02 krowka systemd[1]: Unit user-runtime-dir@6.service has alias user-runtime-dir@.service.
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## External
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- Fedora: add an rpmlint check that verifies that all unit files in the RPM are listed in %systemd_post macros.
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- **dbus:**
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- natively watch for dbus-*.service symlinks (PENDING)
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- teach dbus to activate all services it finds in /etc/systemd/services/org-*.service
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- fedora: suggest auto-restart on failure, but not on success and not on coredump. also, ask people to think about changing the start limit logic. Also point people to RestartPreventExitStatus=, SuccessExitStatus=
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- neither pkexec nor sudo initialize environ[] from the PAM environment?
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- fedora: update policy to declare access mode and ownership of unit files to root:root 0644, and add an rpmlint check for it
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- **missing shell completions:**
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- **zsh:**
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- `<command> <verb> -<TAB>` should complete options, but currently does not
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- systemctl add-wants,add-requires
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- systemctl reboot --boot-loader-entry=
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- systemctl status should know about 'systemd-analyze calendar ... --iterations='
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- If timer has just OnInactiveSec=..., it should fire after a specified time
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after being started.
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- **write blog stories about:**
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- hwdb: what belongs into it, lsusb
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- enabling dbus services
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- how to make changes to sysctl and sysfs attributes
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- remote access
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- how to pass throw-away units to systemd, or dynamically change properties of existing units
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- auto-restart
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- how to develop against journal browsing APIs
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- the journal HTTP iface
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- non-cgroup resource management
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- dynamic resource management with cgroups
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- refreshed, longer missions statement
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- calendar time events
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- init=/bin/sh vs. "emergency" mode, vs. "rescue" mode, vs. "multi-user" mode, vs. "graphical" mode, and the debug shell
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- how to create your own target
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- instantiated apache, dovecot and so on
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- hooking a script into various stages of shutdown/early boot
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## Regularly
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- look for close() vs. close_nointr() vs. close_nointr_nofail()
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- check for strerror(r) instead of strerror(-r)
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- pahole
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- set_put(), hashmap_put() return values check. i.e. == 0 does not free()!
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- link up selected blog stories from man pages and unit files Documentation= fields
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## Janitorial Cleanups
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- machined: make remaining machine bus calls compatible with unpriv machined +
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unpriv npsawn: GetAddresses(), GetSSHInfo(), GetOSRelease(), OpenPTY(),
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OpenLogin(), OpenShell(), BindMount(), CopyFrom(), CopyTo(),
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OpenRootDirectory(). Similar for images: GetHostname(), GetMachineID(),
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GetMachineInfo(), GetOSRelease().
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- rework mount.c and swap.c to follow proper state enumeration/deserialization
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semantics, like we do for device.c now
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- Replace our fstype_is_network() with a call to libmount's mnt_fstype_is_netfs()?
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Having two lists is not nice, but maybe it's now worth making a dependency on
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libmount for something so trivial.
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- drop set_free_free() and switch things over from string_hash_ops to
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string_hash_ops_free everywhere, so that destruction is implicit rather than
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explicit. Similar, for other special hashmap/set/ordered_hashmap destructors.
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- generators sometimes apply C escaping and sometimes specifier escaping to
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paths and similar strings they write out. Sometimes both. We should clean
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this up, and should probably always apply both, i.e. introduce
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unit_file_escape() or so, which applies both.
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- xopenat() should pin the parent dir of the inode it creates before doing its
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thing, so that it can create, open, label somewhat atomically.
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- use CHASE_MUST_BE_DIRECTORY and CHASE_MUST_BE_REGULAR at more places (the
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majority of places that currently employ chase() probably should use this)
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## Deprecations and Removals
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- Remove any support for booting without /usr pre-mounted in the initrd entirely.
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Update INITRD_INTERFACE.md accordingly.
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- remove cgroups v1 support (overdue since EOY 2023). As per
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https://lists.freedesktop.org/archives/systemd-devel/2022-July/048120.html
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and then rework cgroupsv2 support around fds, i.e. keep one fd per active
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unit around, and always operate on that, instead of cgroup fs paths.
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- drop support for LOOP_CONFIGURE-less loopback block devices, once kernel
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baseline is 5.8.
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- Remove /dev/mem ACPI FPDT parsing when /sys/firmware/acpi/fpdt is ubiquitous.
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That requires distros to enable CONFIG_ACPI_FPDT, and have kernels v5.12 for
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x86 and v6.2 for arm.
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- Consider removing root=gpt-auto, and push people to use root=dissect instead.
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- remove any trace of "cpuacct" cgroup controller, it's a cgroupv1 thing.
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similar "devices"
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- drop socket_xattr_supported() once our baseline is kernel 7.0
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## Features
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- sysext: condition confext/sysext on machine tags, too
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- sysupdate: add health check logic, revert updates if fail
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- sysupdate: run things in a loop always, to deal with stepping stones, and
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adding new transfer files. finish, when stable.
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- sysupdate: add flag field for features and components, to require a restart
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of the update loop once they have been updated.
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- confext/sysext: add policy file concept: json files that encode for relevant
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confext/sysext ddis rules when to enable them, i.e. version checks. also use
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it for the garbage collector
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- confext/sysext: mark system as refusing refreshes until reboot if
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confext/sysext says it require a reboot
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- cryptsetup: add a new switch which makes it wait for the keyfile to
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appear. use inotify/mount watching for that. usecase: system waits at boot
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for some key to be supplied, possibly delivered via confext or so. This could
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be useful in particular in CoCo scenarios where a disk encryption key is only
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handed out once an attestation run completed, and might be delivered to the
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node asynchronously.
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- acquire a TSA from time stamping server, include it in report
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- **report:**
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- implement signer for TPM2 that adds a quote + event log excerpt as signing
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object. should include a TPM timestamp, and some "generation ID" provided
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by an orchestrator to guarantee freshness.
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- implement metrics provider in logind: report number of active
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sessions, and number of sessions since boot.
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- implement metrics provider in journald that reports number of log messages
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received since boot, by log priority
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- allow to compile statically (together with the basic and cgroup
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backends)
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- make sure backends can also be invoked via forking off
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- allow metrics providers to indicate which reported values mean
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"nothing"/"invalid"/"zero"/"please-suppress". Then use that to reduce noise
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in systemd-report output.
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- teach cgroup metrics provider to expose PSI information
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- implement metrics provider that reports local IP addresses, and bound open
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IP ports
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- metrics from pid1: suppress metrics form units that are inactive and have nothing to report
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- pass filtering hints to services, so that they can also be applied server-side, not just client side
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- add "hint-suppress-zero" flag (which suppresses all metrics which are zero)
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- add "hint-object" parameter (which only queries info about certain object)
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- make systemd-report a varlink service
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- bootctl set-tries for setting retry counters on boot entries
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- implement enough of PCP in a new sd-pcp-client library that networkd can use
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to punch holes for wireguard into common NAT routers. use that in networkd. alternatively: just use libjuice
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- measure an uapi16 manifest of /etc/ during early boot (so that
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pre-initialized /etc/ can be detected when systems are enrolled into some
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subsystem)
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- optionally turn off import of imds on non-firstboot creds (so that IMDS can
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be considered an attack vector, except for TOFU)
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- store workload identity OIDC server contact info in cloud imds hwdb.
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- systemd-analyze unit-shell-me-harder that has both host and unit trees around
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but mostly lives in unit namespaces
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- os-release consumption at boot: version validation, and maybe in os-release
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- ed25519 authentication for sd-boot upgrades for the dm-verity key logic
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- in sysupdate resolve %C or so as specifier in transfer fields to the value of
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a specific machine tag channel= or so.
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- make vmspawn parse UKIs for direct kernel boot
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- portabled driving by system credential
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- nspawn: optionally provide a /dev/tpm0 + /dev/tpmrm0 that is backed by swtpm,
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much like we do in vmspawn. let's us minimize differences between
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environments systemd runs in.
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- nspawn/vmspawn: add a concept how we can hand into the payload some proof
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that it is running on a certain host, which it can then include in the report,
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and which allows us to put together a map about which node runs as payload of
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which other node. in particular useful for transient nodes, as it gives them
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a better location
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- add a small varlink service that wraps the raw sftp logic (without ssh) after a
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varlink protocol upgrade, which enables varlink clients to do file transfers,
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which is in particular useful when accessing a system via http varlink proxy
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- add a small varlink service that allocates a pty and then does ptyfwd stuff
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after a protocol upgrade on the incoming connection. Then spawn a shell/getty
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on it. This enables varlink clients to acquire a fully featured ssh-like
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interactive tty/shell via varlink, which is again useful via http varlink
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proxy.
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- add something like podman's conmon as a native systemd subsystem:
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i.e. allocate ptys, that can be bound to stdio/console of containers and VMs,
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that maintain a bit of a scrollback buffer, and one can reconnect to
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later. fun idea: might even make /dev/tty1 and friends accessible via
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/dev/vcsa1 under the same protocol. this subsystem should potentially be the
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same as the varlink ssh-like thing listed above.
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- maybe introduce a new ansi sequence that allows propagate SIGWINCH
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inline. Idea would be: to enable inline notification of window sizes client
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sends a new, to be defined ANSI sequence with its current assumption of
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terminal size. Server compares it with current state. If the same it sends
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nothing immediately, but does send exactly one update if it changes, and
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disables the logic. If not the same sends correction immediately, and
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disables the logic. Client has to reissue sequence immediately after getting
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notification to get live updates. Benefit of all of this: better terminal
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experience if we just forward terminal bytes through a serial link/stream
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connection, as terminal sizes will be properly propagated. Write a UAPI spec
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for all this. ptyfwd could translate turn upstream SIGWINCH into upstream
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sequences of this type, so that every step of the way we get the right
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behaviour.
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- implement "varlinkctl trace" or so, that watches socket traffic on a group of
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processes (select by pid, select by cgroup, select by all machine), and shows
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traffic of all sockets marked via the new varlink socket xattrs. Use BPF for
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all of that of course.
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- add tooling for generating dictionary-based hostnames
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- do not pull dbus daemon/broker anymore, instead lazy activate it. Given how
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the Varlinkifcation has progressed various non-desktop usescase might not
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need D-Bus running at all anymore.
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- format-table: introduce the concept of a "title" for a table, which remains
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closely associated with the table. in most cases where want to output
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multiple tables from the same tool we want to separate things with a title,
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hence we might as well associate the title with the table itself, and
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streamline a few things.
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- sysupdate: offer reading transfer files/components/features optionally from
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some JSON fragment rather than transfer files, so that we can update it
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independently from any DDI, and it needs no activation cycle. Why? so that
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making additional transfers/components/features available can be done without
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reloading confext/sysext, and out-band with other configuration changes.
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- sysupdate: go through all components, and update them all, one by one.
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- pcrextend: we probably should measure /etc/machine-info during boot somehow
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- pcrextend: we should measure something when we enter developer mode, by some
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definition of developer mode.
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- firstboot: optionally accept credentials at firstboot without authentication
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- firstboot/sysinstall: add simple interface for prompting users to enable
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"features" exposed by sysupdate.
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- a tool that can prep credentials, put them in the ESP, for provisioning
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systems for SBC or UEFI/HTTP boot. Should be doing what sysinstall does with
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the credentials, and maybe even *be* sysinstall.
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- make sure we always pass O_NOFOLLOW on O_CREAT
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- xopenat(): maybe imply O_NOFOLLOW on O_CREAT
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- StorageProvider interface + storagectl
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- hook-up in systemd-nspawn
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- hook-up in service manager (BindVolume=)
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- introduce a locking concept: right now all access to volumes is fully
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shared. Let's add a basic locking concept: supporting backends can take an
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additional locking flag (which has to be combined with Varlink's "more"),
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in which case access would only be handed out to one client at a time, with
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the lock's lifetime synced up with the Varlink connection lifetime.
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- introduce a volume lifecycle concept: optionally support volumes whose
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whole lifecycle is associated with the varlink connections they are tied
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to: when the last varlink connection that acquired them goes away, the
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volume is auto-destroyed. Would be exposed via a new flag on the Acquire
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call, similar to the locking logic above.
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- clean up credential naming a bit: let's say encrypted creds always should
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carry .cred suffix, and unencrypted should not.
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- clean up naming of sidecar files in sd-stub: let's put global ones strictly
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into /loader/extras/
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- a small tool that can do basic btrfs raid policy mgmt. i.e. gets started as
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part of the initial transaction for some btrfs raid fs, waits for some time,
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then puts message on screen (plymouth, console) that some devices apparently
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are not showing up, then counts down, eventually set a flag somewhere, and
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retriggers the fs is was invoked for, which causes the udev rules to rerun
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that assemble the btrfs raid, but this time force degraded assembly.
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- a way for container managers to turn off getty starting via $container_headless= or so...
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- add "conditions" for bls type 1 and type 2 profiles that allow suppressing
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them under various conditions: 1. if tpm2 is available or not available;
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2. if sb is on or off; 3. if we are netbooted or not; …
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- add "homectl export" and "homectl import" that gets you an "atomic" snapshot
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of your homedir, i.e. either a tarball or a snapshot of the underlying disk
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(use FREEZE/THAW to make it consistent, btrfs snapshots)
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- Add "purpose" flag to partition flags in discoverable partition spec that
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indicate if partition is intended for sysext, for portable service, for
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booting and so on. Then, when dissecting DDI allow specifying a purpose to
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use as additional search condition. Use case: images that combined a sysext
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partition with a portable service partition in one.
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- **systemd-sysinstall:**
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- read installation definition from json file
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- polkit support in sysinstall
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- sysinstall: permit driving installer via credentials
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- add --offline=no mode where we talk to socket based services rather than forking off
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- if a user doesn't pick a locale during boot into installer, don't ask again after install, because we suppressed credential propagation
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- repart: add MatchLabel= which matches against partition label, so that we
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truly can install different images in parallel
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- add "systemctl wait" or so, which does what "systemd-run --wait" does, but
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for all units. It should be both a way to pin units into memory as well as a
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wait to retrieve their exit data.
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- add "systemd-analyze debug" + AttachDebugger= in unit files: The former
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specifies a command to execute; the latter specifies that an already running
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"systemd-analyze debug" instance shall be contacted and execution paused
|
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until it gives an OK. That way, tools like gdb or strace can be safely be
|
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invoked on processes forked off PID 1.
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- add "systemd-sysext identify" verb, that you can point on any file in /usr/
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and that determines from which overlayfs layer it originates, which image, and with
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what it was signed.
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- add --vacuum-xyz options to coredumpctl, matching those journalctl already has.
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- sysupdate: in .transfer files have a 2nd url that is used if we
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auto-rollbacked the OS before.
|
||
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- sysupdate: optionally enrich URL with countme=1 once a week
|
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- sysupdate: have an explicit concept of update policies: i.e. a choice of at least
|
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- download list + report updates in motd – but do not auto update
|
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- download list + download new version – but do not apply it
|
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- download list + download new version + apply it – but do not reboot
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- download list + download new version + apply it + reboot
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Other things the policy should contain is when to place the reboot.
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This would all decouple the updating of the package list from the application
|
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of it. Which is great for "countme" style stuff.
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- Add a "systemctl list-units --by-slice" mode or so, which rearranges the
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output of "systemctl list-units" slightly by showing the tree structure of
|
||
the slices, and the units attached to them.
|
||
|
||
- Add a concept of ListenStream=anonymous to socket units: listen on a socket
|
||
that is deleted in the fs. Use case would be with ConnectSocket= above.
|
||
|
||
- add a ConnectSocket= setting to service unit files, that may reference a
|
||
socket unit, and which will connect to the socket defined therein, and pass
|
||
the resulting fd to the service program via socket activation proto.
|
||
|
||
- add a dbus call to generate target from current state
|
||
|
||
- add a dependency on standard-conf.xml and other included files to man pages
|
||
|
||
- add a job mode that will fail if a transaction would mean stopping
|
||
running units. Use this in timedated to manage the NTP service
|
||
state.
|
||
https://lists.freedesktop.org/archives/systemd-devel/2015-April/030229.html
|
||
|
||
- add a kernel cmdline switch (and cred?) for marking a system to be
|
||
"headless", in which case we never open /dev/console for reading, only for
|
||
writing. This would then mean: systemd-firstboot would process creds but not
|
||
ask interactively, getty would not be started and so on.
|
||
|
||
- add a Load= setting which takes literal data in text or base64 format, and
|
||
puts it into a memfd, and passes that. This enables some fun stuff, such as
|
||
embedding bash scripts in unit files, by combining Load= with
|
||
ExecStart=/bin/bash /proc/self/fd/3
|
||
|
||
- add a mechanism we can drop capabilities from pid1 *before* transitioning
|
||
from initrd to host. i.e. before we transition into the slightly lower trust
|
||
domain that is the host systems we might want to get rid of some caps.
|
||
Example: CAP_SYS_BPF in the signed bpf loading logic above. (We already have
|
||
CapabilityBoundingSet= in system.conf, but that is enforced when pid 1
|
||
initializes, rather then when it transitions to the next.)
|
||
|
||
- add a new "debug" job mode, that is propagated to unit_start() and for
|
||
services results in two things: we raise SIGSTOP right before invoking
|
||
execve() and turn off watchdog support. Then, use that to implement
|
||
"systemd-gdb" for attaching to the start-up of any system service in its
|
||
natural habitat.
|
||
|
||
- add a new flag to chase() that stops chasing once the first missing
|
||
component is found and then allows the caller to create the rest.
|
||
|
||
- add a new PE binary section ".mokkeys" or so which sd-stub will insert into
|
||
Mok keyring, by overriding/extending whatever shim sets in the EFI
|
||
var. Benefit: we can extend the kernel module keyring at ukify time,
|
||
i.e. without recompiling the kernel, taking an upstream OS' kernel and adding
|
||
a local key to it.
|
||
|
||
- add a new specifier to unit files that figures out the DDI the unit file is
|
||
from, tracing through overlayfs, DM, loopback block device.
|
||
|
||
- add a new switch --auto-definitions=yes/no or so to systemd-repart. If
|
||
specified, synthesize a definition automatically if we can: enlarge last
|
||
partition on disk, but only if it is marked for growing and not read-only.
|
||
|
||
- add a new syscall group "@esoteric" for more esoteric stuff such as bpf() and
|
||
usefaultd() and make systemd-analyze check for it.
|
||
|
||
- Add a new verb "systemctl top"
|
||
|
||
- add a pam module that on password changes updates any LUKS slot where the password matches
|
||
|
||
- add a percentage syntax for TimeoutStopSec=, e.g. TimeoutStopSec=150%, and
|
||
then use that for the setting used in user@.service. It should be understood
|
||
relative to the configured default value.
|
||
|
||
- add a plugin for factory reset logic that erases certain parts of the ESP,
|
||
but leaves others in place.
|
||
|
||
- add a proper concept of a "developer" mode, i.e. where cryptographic
|
||
protections of the root OS are weakened after interactive confirmation, to
|
||
allow hackers to allow their own stuff. idea: allow entering developer mode
|
||
only via explicit choice in boot menu: i.e. add explicit boot menu item for
|
||
it. When developer mode is entered, generate a key pair in the TPM2, and add
|
||
the public part of it automatically to keychain of valid code signature keys
|
||
on subsequent boots. Then provide a tool to sign code with the key in the
|
||
TPM2. Ensure that boot menu item is the only way to enter developer mode, by
|
||
binding it to locality/PCRs so that keys cannot be generated otherwise.
|
||
|
||
- add a system-wide seccomp filter list for syscalls, kill "acct()" "@obsolete"
|
||
and a few other legacy syscalls that way.
|
||
|
||
- add a test if all entries in the catalog are properly formatted.
|
||
(Adding dashes in a catalog entry currently results in the catalog entry
|
||
being silently skipped. journalctl --update-catalog must warn about this,
|
||
and we should also have a unit test to check that all our message are OK.)
|
||
|
||
- add a utility that can be used with the kernel's
|
||
CONFIG_STATIC_USERMODEHELPER_PATH and then handles them within pid1 so that
|
||
security, resource management and cgroup settings can be enforced properly
|
||
for all umh processes.
|
||
|
||
- add a way to lock down cgroup migration: a boolean, which when set for a unit
|
||
makes sure the processes in it can never migrate out of it
|
||
|
||
- add ability to path_is_valid() to classify paths that refer to a dir from
|
||
those which may refer to anything, and use that in various places to filter
|
||
early. i.e. stuff ending in "/", "/." and "/.." definitely refers to a
|
||
directory, and paths ending that way can be refused early in many contexts.
|
||
|
||
- Add ACL-based access management to .socket units. i.e. add AllowPeerUser= +
|
||
AllowPeerGroup= that installs additional user/group ACL entries on AF_UNIX
|
||
sockets.
|
||
|
||
- Add AddUser= setting to unit files, similar to DynamicUser=1 which however
|
||
creates a static, persistent user rather than a dynamic, transient user. We
|
||
can leverage code from sysusers.d for this.
|
||
|
||
- add an explicit parser for LimitRTPRIO= that verifies
|
||
the specified range and generates sane error messages for incorrect
|
||
specifications.
|
||
|
||
- Add and pickup tpm2 metadata for creds structure.
|
||
|
||
- add another PE section ".fname" or so that encodes the intended filename for
|
||
PE file, and validate that when loading add-ons and similar before using
|
||
it. This is particularly relevant when we load multiple add-ons and want to
|
||
sort them to apply them in a define order. The order should not be under
|
||
control of the attacker.
|
||
|
||
- add bus API for creating unit files in /etc, reusing the code for transient units
|
||
|
||
- add bus api to query unit file's X fields.
|
||
|
||
- add bus API to remove unit files from /etc
|
||
|
||
- add bus API to retrieve current unit file contents (i.e. implement "systemctl cat" on the bus only)
|
||
|
||
- Add ConditionDirectoryNotEmpty= handle non-absolute paths as a search path or add
|
||
ConditionConfigSearchPathNotEmpty= or different syntax? See the discussion starting at
|
||
https://github.com/systemd/systemd/pull/15109#issuecomment-607740136.
|
||
|
||
- add CopyFile= or so as unit file setting that may be used to copy files or
|
||
directory trees from the host to the services RootImage= and RootDirectory=
|
||
environment. Which we can use for /etc/machine-id and in particular
|
||
/etc/resolv.conf. Should be smart and do something useful on read-only
|
||
images, for example fall back to read-only bind mounting the file instead.
|
||
|
||
- Add ELF section to make systemd main binary recognizable cleanly, the same
|
||
way as we make sd-boot recognizable via PE section.
|
||
|
||
- Add ExecMonitor= setting. May be used multiple times. Forks off a process in
|
||
the service cgroup, which is supposed to monitor the service, and when it
|
||
exits the service is considered failed by its monitor.
|
||
|
||
- add field to bls type 1 and type 2 profiles that ensures an item is never
|
||
considered for automatic selection
|
||
|
||
- add generator that pulls in systemd-network from containers when
|
||
CAP_NET_ADMIN is set, more than the loopback device is defined, even
|
||
when it is otherwise off
|
||
|
||
- add growvol and makevol options for /etc/crypttab, similar to
|
||
x-systemd.growfs and x-systemd.makefs.
|
||
|
||
- Add knob to cryptsetup, to trigger automatic reboot on failure to unlock
|
||
disk. Enable this by default for rootfs, also in gpt-auto-generator
|
||
|
||
- add linker script that implicitly adds symbol for build ID and new coredump
|
||
json package metadata, and use that when logging
|
||
|
||
- add new gpt type for btrfs volumes
|
||
|
||
- add new tool that can be used in debug mode runs in very early boot,
|
||
generates a random password, passes it as credential to sysusers for the root
|
||
user, then displays it on screen. people can use this to remotely log in.
|
||
|
||
- add option to sockets to avoid activation. Instead just drop packets/connections, see http://cyberelk.net/tim/2012/02/15/portreserve-systemd-solution/
|
||
|
||
- add PR_SET_DUMPABLE service setting
|
||
|
||
- add proper .osrel matching for PE addons. i.e. refuse applying an addon
|
||
intended for a different OS. Take inspiration from how confext/sysext are
|
||
matched against OS.
|
||
|
||
- add proper dbus APIs for the various sd_notify() commands, such as MAINPID=1
|
||
and so on, which would mean we could report errors and such.
|
||
|
||
- add service file setting to force the fwmark (a la SO_MARK) to some value, so
|
||
that we can allowlist certain services for imds this way.
|
||
|
||
- Add service unit setting ConnectStream= which takes IP addresses and connects to them.
|
||
|
||
- add some optional flag to ReadWritePaths= and friends, that has the effect
|
||
that we create the dir in question when the service is started. Example:
|
||
|
||
ReadWritePaths=:/var/lib/foobar
|
||
|
||
- add some service that makes an atomic snapshot of PCR state and event log up
|
||
to that point available, possibly even with quote by the TPM.
|
||
|
||
- add some special mode to LogsDirectory=/StateDirectory=… that allows
|
||
declaring these directories without necessarily pulling in deps for them, or
|
||
creating them when starting up. That way, we could declare that
|
||
systemd-journald writes to /var/log/journal, which could be useful when we
|
||
doing disk usage calculations and so on.
|
||
|
||
- add support for "portablectl attach http://foobar.com/waaa.raw (i.e. importd integration)
|
||
|
||
- add support for activating nvme-oF devices at boot automatically via kernel
|
||
cmdline, and maybe even support a syntax such as
|
||
root=nvme:\<trtype>:\<traddr>:\<trsvcid>:\<nqn>:\<partition> to boot directly from
|
||
nvme-oF
|
||
|
||
- add support for asymmetric LUKS2 TPM based encryption. i.e. allow preparing
|
||
an encrypted image on some host given a public key belonging to a specific
|
||
other host, so that only hosts possessing the private key in the TPM2 chip
|
||
can decrypt the volume key and activate the volume. Use case: systemd-confext
|
||
for a central orchestrator to generate confext images securely that can only
|
||
be activated on one specific host (which can be used for installing a bunch
|
||
of creds in /etc/credstore/ for example). Extending on this: allow binding
|
||
LUKS2 TPM based encryption also to the TPM2 internal clock. Net result:
|
||
prepare a confext image that can only be activated on a specific host that
|
||
runs a specific software in a specific time window. confext would be
|
||
automatically invalidated outside of it.
|
||
|
||
- Add support for extra verity configuration options to systemd-repart (FEC,
|
||
hash type, etc)
|
||
|
||
- Add SUPPORT_END_URL= field to os-release with more *actionable* information
|
||
what to do if support ended
|
||
|
||
- Add systemd-analyze security checks for RestrictFileSystems= and
|
||
RestrictNetworkInterfaces=
|
||
|
||
- Add systemd-mount@.service which is instantiated for a block device and
|
||
invokes systemd-mount and exits. This is then useful to use in
|
||
ENV{SYSTEMD_WANTS} in udev rules, and a bit prettier than using RUN+=
|
||
|
||
- Add systemd-sysupdate-initrd.service or so that runs systemd-sysupdate in the
|
||
initrd to bootstrap the initrd to populate the initial partitions. Some things
|
||
to figure out:
|
||
- Should it run on firstboot or on every boot?
|
||
- If run on every boot, should it use the sysupdate config from the host on
|
||
subsequent boots?
|
||
|
||
- add systemd.abort_on_kill or some other such flag to send SIGABRT instead of SIGKILL
|
||
(throughout the codebase, not only PID1)
|
||
|
||
- Add UKI profile conditioning so that profiles are only available if secure
|
||
boot is turned off, or only on. similar, add conditions on TPM availability,
|
||
network boot, and other conditions.
|
||
|
||
- Allocate UIDs/GIDs automatically in userdbctl load-credentials if none are
|
||
included in the user/group record credentials
|
||
|
||
- allow dynamic modifications of ConcurrencyHardMax= and ConcurrencySoftMax=
|
||
via DBus (and with that also by daemon-reload). Similar for portabled.
|
||
|
||
- also include packaging metadata (á la
|
||
https://systemd.io/PACKAGE_METADATA_FOR_EXECUTABLE_FILES/) in our UEFI PE
|
||
binaries, using the same JSON format.
|
||
|
||
- also parse out primary GPT disk label uuid from gpt partition device path at
|
||
boot and pass it as efi var to OS.
|
||
|
||
- as soon as we have sender timestamps, revisit coalescing multiple parallel daemon reloads:
|
||
https://lists.freedesktop.org/archives/systemd-devel/2014-December/025862.html
|
||
|
||
- augment CODE_FILE=, CODE_LINE= with something like CODE_BASE= or so which
|
||
contains some identifier for the project, which allows us to include
|
||
clickable links to source files generating these log messages. The identifier
|
||
could be some abbreviated URL prefix or so (taking inspiration from Go
|
||
imports). For example, for systemd we could use
|
||
CODE_BASE=github.com/systemd/systemd/blob/98b0b1123cc or so which is
|
||
sufficient to build a link by prefixing "http://" and suffixing the
|
||
CODE_FILE.
|
||
|
||
- Augment MESSAGE_ID with MESSAGE_BASE, in a similar fashion so that we can
|
||
make clickable links from log messages carrying a MESSAGE_ID, that lead to
|
||
some explanatory text online.
|
||
|
||
- automatic boot assessment: add one more default success check that just waits
|
||
for a bit after boot, and blesses the boot if the system stayed up that long.
|
||
|
||
- automatically ignore threaded cgroups in cg_xyz().
|
||
|
||
- automatically mount one virtiofs during early boot phase to /run/host/,
|
||
similar to how we do that for nspawn, based on some clear tag.
|
||
|
||
- automatically propagate LUKS password credential into cryptsetup from host
|
||
(i.e. SMBIOS type #11, …), so that one can unlock LUKS via VM hypervisor
|
||
supplied password.
|
||
|
||
- automatically reset specific EFI vars on factory reset (make this generic
|
||
enough so that infra can be used to erase shim's mok vars?)
|
||
|
||
- be able to specify a forced restart of service A where service B depends on, in case B
|
||
needs to be auto-respawned?
|
||
|
||
- be more careful what we export on the bus as (usec_t) 0 and (usec_t) -1
|
||
|
||
- beef up log.c with support for stripping ANSI sequences from strings, so that
|
||
it is OK to include them in log strings. This would be particularly useful so
|
||
that our log messages could contain clickable links for example for unit
|
||
files and suchlike we operate on.
|
||
|
||
- beef up pam_systemd to take unit file settings such as cgroups properties as
|
||
parameters
|
||
|
||
- blog about fd store and restartable services
|
||
|
||
- **bootctl:**
|
||
- recognize the case when not booted on EFI
|
||
- add tool for registering BootXXX entry that boots from some http
|
||
server of your choice (i.e. like kernel-bootcfg --add-uri=)
|
||
- add reboot-to-disk which takes a block device name, and
|
||
automatically sets things up so that system reboots into that device next.
|
||
- show whether UEFI audit mode is available
|
||
- teach it to prepare an ESP wholesale, i.e. with mkfs.vfat invocation
|
||
- teach it to copy in unified kernel images and maybe type #1 boot loader spec entries from host
|
||
|
||
- BootLoaderSpec: define a way how an installer can figure out whether a BLS
|
||
compliant boot loader is installed.
|
||
|
||
- BootLoaderSpec: document @saved pseudo-entry, update mention in BLI
|
||
|
||
- bootspec: permit graceful "update" from type #2 to type #1. If both a type #1
|
||
and a type #2 entry exist under otherwise the exact same name, then use the
|
||
type #1 entry, and ignore the type #2 entry. This way, people can "upgrade"
|
||
from the UKI with all parameters baked in to a Type #1 .conf file with manual
|
||
parametrization, if needed. This matches our usual rule that admin config
|
||
should win over vendor defaults.
|
||
|
||
- bpf: see if we can address opportunistic inode sharing of immutable fs images
|
||
with BPF. i.e. if bpf gives us power to hook into openat() and return a
|
||
different inode than is requested for which we however it has same contents
|
||
then we can use that to implement opportunistic inode sharing among DDIs:
|
||
make all DDIs ship xattr on all reg files with a SHA256 hash. Then, also
|
||
dictate that DDIs should come with a top-level subdir where all reg files are
|
||
linked into by their SHA256 sum. Then, whenever an inode is opened with the
|
||
xattr set, check bpf table to find dirs with hashes for other prior DDIs and
|
||
try to use inode from there.
|
||
|
||
- bpf: see if we can use BPF to solve the syslog message cgroup source problem:
|
||
one idea would be to patch source sockaddr of all AF_UNIX/SOCK_DGRAM to
|
||
implicitly contain the source cgroup id. Another idea would be to patch
|
||
sendto()/connect()/sendmsg() sockaddr on-the-fly to use a different target
|
||
sockaddr.
|
||
|
||
- bsod: add target "bsod.target" or so, which invokes systemd-bsod.target and
|
||
waits and then reboots. Then use OnFailure=bsod.target from various jobs that
|
||
should result in system reboots, such as TPM tamper detection cases.
|
||
|
||
- bsod: maybe use graphical mode. Use DRM APIs directly, see
|
||
https://github.com/dvdhrm/docs/blob/master/drm-howto/modeset.c for an example
|
||
for doing that.
|
||
|
||
- build short web pages out of each catalog entry, build them along with man
|
||
pages, and include hyperlinks to them in the journal output
|
||
|
||
- busctl: maybe expose a verb "ping" for pinging a dbus service to see if it
|
||
exists and responds.
|
||
|
||
- bypass SIGTERM state in unit files if KillSignal is SIGKILL
|
||
|
||
- cache sd_event_now() result from before the first iteration...
|
||
|
||
- calenderspec: add support for week numbers and day numbers within a
|
||
year. This would allow us to define "bi-weekly" triggers safely.
|
||
|
||
- cgroups: use inotify to get notified when somebody else modifies cgroups
|
||
owned by us, then log a friendly warning.
|
||
|
||
- **cgroups:**
|
||
- implement per-slice CPUFairScheduling=1 switch
|
||
- introduce high-level settings for RT budget, swappiness
|
||
- how to reset dynamically changed unit cgroup attributes sanely?
|
||
- when reloading configuration, apply new cgroup configuration
|
||
- when recursively showing the cgroup hierarchy, optionally also show
|
||
the hierarchies of child processes
|
||
- add settings for cgroup.max.descendants and cgroup.max.depth,
|
||
maybe use them for user@.service
|
||
|
||
- chase(): take inspiration from path_extract_filename() and return
|
||
O_DIRECTORY if input path contains trailing slash.
|
||
|
||
- Check that users of inotify's IN_DELETE_SELF flag are using it properly, as
|
||
usually IN_ATTRIB is the right way to watch deleted files, as the former only
|
||
fires when a file is actually removed from disk, i.e. the link count drops to
|
||
zero and is not open anymore, while the latter happens when a file is
|
||
unlinked from any dir.
|
||
|
||
- Clean up "reboot argument" handling, i.e. set it through some IPC service
|
||
instead of directly via /run/, so that it can be sensible set remotely.
|
||
|
||
- clean up date formatting and parsing so that all absolute/relative timestamps we format can also be parsed
|
||
|
||
- **complete varlink introspection comments:**
|
||
- io.systemd.ManagedOOM
|
||
- io.systemd.Network
|
||
- io.systemd.PCRLock
|
||
- io.systemd.Resolve.Monitor
|
||
- io.systemd.Resolve
|
||
- io.systemd.oom
|
||
- io.systemd.sysext
|
||
|
||
- confext/sysext: instead of mounting the overlayfs directly on /etc/ + /usr/,
|
||
insert an intermediary bind mount on itself there. This has the benefit that
|
||
services where mount propagation from the root fs is off, an still have
|
||
confext/sysext propagated in.
|
||
|
||
- consider adding a new partition type, just for /opt/ for usage in system
|
||
extensions
|
||
|
||
- coredump: maybe when coredumping read a new xattr from /proc/$PID/exe that
|
||
may be used to mark a whole binary as non-coredumpable. Would fix:
|
||
https://bugs.freedesktop.org/show_bug.cgi?id=69447
|
||
|
||
- **coredump:**
|
||
- save coredump in Windows/Mozilla minidump format
|
||
- when truncating coredumps, also log the full size that the process had, and make a metadata field so we can report truncated coredumps
|
||
- add examples for other distros in PACKAGE_METADATA_FOR_EXECUTABLE_FILES
|
||
|
||
- **credentials system:**
|
||
- acquire from EFI variable?
|
||
- acquire via ask-password?
|
||
- acquire creds via keyring?
|
||
- pass creds via keyring?
|
||
- pass creds via memfd?
|
||
- acquire + decrypt creds from pkcs11?
|
||
- make macsec code in networkd read key via creds logic (copy logic from
|
||
wireguard)
|
||
- make gatewayd/remote read key via creds logic
|
||
- add sd_notify() command for flushing out creds not needed anymore
|
||
- if we ever acquire a secure way to derive cgroup id of socket
|
||
peers (i.e. SO_PEERCGROUPID), then extend the "scoped" credential logic to
|
||
allow cgroup-scoped (i.e. app or service scoped) credentials. Then, as next
|
||
step use this to implement per-app/per-service encrypted directories, where
|
||
we set up fscrypt on the StateDirectory= with a randomized key which is
|
||
stored as xattr on the directory, encrypted as a credential.
|
||
- optionally include a per-user secret in scoped user-credential
|
||
encryption keys. should come from homed in some way, derived from the luks
|
||
volume key or fscrypt directory key.
|
||
- add a flag to the scoped credentials that if set require PK
|
||
reauthentication when unlocking a secret.
|
||
- rework docs. The list in
|
||
https://systemd.io/CREDENTIALS/#well-known-credentials is very stale.
|
||
Document credentials in individual man pages, generate list as in
|
||
systemd.directives.
|
||
|
||
- creds: add a new cred format that reused the JSON structures we use in the
|
||
LUKS header, so that we get the various newer policies for free.
|
||
|
||
- cryptenroll/cryptsetup/homed: add unlock mechanism that combines tpm2 and
|
||
fido2, as well as tpm2 + ssh-agent, inspired by ChromeOS' logic: encrypt the
|
||
volume key with the TPM, with a policy that insists that a nonce is signed by
|
||
the fido2 device's key or ssh-agent key. Thus, add unlock/login time the TPM
|
||
generates a nonce, which is sent as a challenge to the fido2/ssh-agent, which
|
||
returns a signature which is handed to the tpm, which then reveals the volume
|
||
key to the PC.
|
||
|
||
- cryptenroll/cryptsetup/homed: similar to this, implement TOTP backed by TPM.
|
||
|
||
- cryptsetup/homed: implement TOTP authentication backed by TPM2 and its
|
||
internal clock.
|
||
|
||
- **cryptsetup:**
|
||
- cryptsetup-generator: allow specification of passwords in crypttab itself
|
||
- support rd.luks.allow-discards= kernel cmdline params in cryptsetup generator
|
||
- add boolean for disabling use of any password/recovery key slots.
|
||
(i.e. that we can operate in a tpm-only mode, and thus protect us from rogue
|
||
root disks)
|
||
- new crypttab option to auto-grow a luks device to its backing
|
||
partition size. new crypttab option to reencrypt a luks device with a new
|
||
volume key.
|
||
- a mechanism that allows signing a volume key with some key that
|
||
has to be present in the kernel keyring, or similar, to ensure that confext
|
||
DDIs can be encrypted against the local SRK but signed with the admin's key
|
||
and thus can authenticated locally before they are decrypted.
|
||
- add option for automatically removing empty password slot on boot
|
||
- optionally, when run during boot-up and password is never
|
||
entered, and we are on battery power (or so), power off machine again
|
||
- when waiting for FIDO2/PKCS#11 token, tell plymouth that, and
|
||
allow plymouth to abort the waiting and enter pw instead
|
||
- allow encoding key directly in /etc/crypttab, maybe with a
|
||
"base64:" prefix. Useful in particular for pkcs11 mode.
|
||
- reimplement the mkswap/mke2fs in cryptsetup-generator to use
|
||
systemd-makefs.service instead.
|
||
|
||
- sysext: make systemd-{sys,conf}ext-sysroot.service work in the split `/var`
|
||
configuration.
|
||
|
||
- sd-varlink: add fully async modes of the protocol upgrade stuff
|
||
|
||
- repart: maybe remove iso9660/eltorito superblock from disk when booting via
|
||
gpt, if there is one.
|
||
|
||
- crypttab/gpt-auto-generator: allow explicit control over which unlock mechs
|
||
to permit, and maybe have a global headless kernel cmdline option
|
||
|
||
- currently x-systemd.timeout is lost in the initrd, since crypttab is copied into dracut, but fstab is not
|
||
|
||
- dbus: when a unit failed to load (i.e. is in UNIT_ERROR state), we
|
||
should be able to safely try another attempt when the bus call LoadUnit() is invoked.
|
||
|
||
- ddi must be listed as block device fstype
|
||
|
||
- define a JSON format for units, separating out unit definitions from unit
|
||
runtime state. Then, expose it:
|
||
|
||
1. Add Describe() method to Unit D-Bus object that returns a JSON object
|
||
about the unit.
|
||
2. Expose this natively via Varlink, in similar style
|
||
3. Use it when invoking binaries (i.e. make PID 1 fork off systemd-executor
|
||
binary which reads the JSON definition and runs it), to address the cow
|
||
trap issue and the fact that NSS is actually forbidden in
|
||
forked-but-not-exec'ed children
|
||
4. Add varlink API to run transient units based on provided JSON definitions
|
||
|
||
- define gpt header bits to select volatility mode
|
||
|
||
- delay activation of logind until somebody logs in, or when /dev/tty0 pulls it
|
||
in or lingering is on (so that containers don't bother with it until PAM is used). also exit-on-idle
|
||
|
||
- deprecate RootDirectoryStartOnly= in favour of a new ExecStart= prefix char
|
||
|
||
- **dhcp6:**
|
||
- add functions to set previously stored IPv6 addresses on startup and get
|
||
them at shutdown; store them in client->ia_na
|
||
- write more test cases
|
||
- implement reconfigure support, see 5.3., 15.11. and 22.20.
|
||
- implement support for temporary addresses (IA_TA)
|
||
- implement dhcpv6 authentication
|
||
- investigate the usefulness of Confirm messages; i.e. are there any
|
||
situations where the link changes without any loss in carrier detection
|
||
or interface down
|
||
- some servers don't do rapid commit without a filled in IA_NA, verify
|
||
this behavior
|
||
- RouteTable= ?
|
||
|
||
- **dhcp:**
|
||
- figure out how much we can increase Maximum Message Size
|
||
|
||
- dissection policy should enforce that unlocking can only take place by
|
||
certain means, i.e. only via pw, only via tpm2, or only via fido, or a
|
||
combination thereof.
|
||
|
||
- do a console daemon that takes stdio fds for services and allows to reconnect
|
||
to them later
|
||
|
||
- doc: prep a document explaining PID 1's internal logic, i.e. transactions,
|
||
jobs, units
|
||
|
||
- doc: prep a document explaining resolved's internal objects, i.e. Query
|
||
vs. Question vs. Transaction vs. Stream and so on.
|
||
|
||
- docs: bring https://systemd.io/MY_SERVICE_CANT_GET_REALTIME up to date
|
||
|
||
- document Environment=SYSTEMD_LOG_LEVEL=debug drop-in in debugging document
|
||
|
||
- document org.freedesktop.MemoryAllocation1
|
||
|
||
- **document:**
|
||
- document that deps in [Unit] sections ignore Alias= fields in
|
||
[Install] units of other units, unless those units are disabled
|
||
- document that service reload may be implemented as service reexec
|
||
- add a man page containing packaging guidelines and recommending usage of things like Documentation=, PrivateTmp=, PrivateNetwork= and ReadOnlyDirectories=/etc /usr.
|
||
- document systemd-journal-flush.service properly
|
||
- documentation: recommend to connect the timer units of a service to the service via Also= in [Install]
|
||
- man: document the very specific env the shutdown drop-in tools live in
|
||
- man: add more examples to man pages,
|
||
- in particular an example how to do the equivalent of switching runlevels
|
||
- man: maybe sort directives in man pages, and take sections from --help and apply them to man too
|
||
- document root=gpt-auto properly
|
||
|
||
- dot output for --test showing the 'initial transaction'
|
||
|
||
- drop nss-myhostname in favour of nss-resolve?
|
||
|
||
- **EFI:**
|
||
- honor timezone efi variables for default timezone selection (if there are any?)
|
||
|
||
- enable LockMLOCK to take a percentage value relative to physical memory
|
||
|
||
- Enable RestrictFileSystems= for all our long-running services (similar:
|
||
RestrictNetworkInterfaces=)
|
||
|
||
- encode type1 entries in some UKI section to add additional entries to the
|
||
menu.
|
||
|
||
- enumerate virtiofs devices during boot-up in a generator, and synthesize
|
||
mounts for rootfs, /usr/, /home/, /srv/ and some others from it, depending on
|
||
the "tag". (waits for: https://gitlab.com/virtio-fs/virtiofsd/-/issues/128)
|
||
|
||
- /etc/veritytab: allow that the roothash column can be specified as fs path
|
||
including a path to an AF_UNIX path, similar to how we do things with the
|
||
keys of /etc/crypttab. That way people can store/provide the roothash
|
||
externally and provide to us on demand only.
|
||
|
||
- exponential backoff in timesyncd when we cannot reach a server
|
||
|
||
- expose MS_NOSYMFOLLOW in various places
|
||
|
||
- expose the handoff timestamp fully via the D-Bus properties that contain
|
||
ExecStatus information
|
||
|
||
- extend the smbios11 logic for passing credentials so that instead of passing
|
||
the credential data literally it can also just reference an AF_VSOCK CID/port
|
||
to read them from. This way the data doesn't remain in the SMBIOS blob during
|
||
runtime, but only in the credentials fs.
|
||
|
||
- extend the verity signature partition to permit multiple signatures for the
|
||
same root hash, so that people can sign a single image with multiple keys.
|
||
|
||
- figure out a nice way how we can let the admin know what child/sibling unit causes cgroup membership for a specific unit
|
||
|
||
- Figure out how to do unittests of networkd's state serialization
|
||
|
||
- Figure out naming of verbs in systemd-analyze: we have (singular) capability,
|
||
exit-status, but (plural) filesystems, architectures.
|
||
|
||
- figure out what to do about credentials sealed to PCRs in kexec + soft-reboot
|
||
scenarios. Maybe insist sealing is done additionally against some keypair in
|
||
the TPM to which access is updated on each boot, for the next, or so?
|
||
|
||
- figure out when we can use the coarse timers
|
||
|
||
- Find a solution for SMACK capabilities stuff:
|
||
https://lists.freedesktop.org/archives/systemd-devel/2014-December/026188.html
|
||
|
||
- fix bug around run0 background color on ls in fresh terminal
|
||
|
||
- Fix DECIMAL_STR_MAX or DECIMAL_STR_WIDTH. One includes a trailing NUL, the
|
||
other doesn't. What a disaster. Probably to exclude it.
|
||
|
||
- fix homed/homectl confusion around terminology, i.e. "home directory"
|
||
vs. "home" vs. "home area". Stick to one term for the concept, and it
|
||
probably shouldn't contain "area".
|
||
|
||
- fix our various hwdb lookup keys to end with ":" again. The original idea was
|
||
that hwdb patterns can match arbitrary fields with expressions like
|
||
"*:foobar:*", to wildcard match both the start and the end of the string.
|
||
This only works safely for later extensions of the string if the strings
|
||
always end in a colon. This requires updating our udev rules, as well as
|
||
checking if the various hwdb files are fine with that.
|
||
|
||
- flush_accept() should look at sockdiag queued sockets count and exit once we
|
||
flushed out the specified number of connections.
|
||
|
||
- flush_fd() should probably try to be smart and stop reading once we know that
|
||
all further queued data was enqueued after flush_fd() was originally
|
||
called. For that, try SIOCINQ if fd refers to stream socket, and look at
|
||
timestamps for datagram sockets.
|
||
|
||
- for better compat with major clouds: implement simple PTP device support in
|
||
timesyncd
|
||
|
||
- for better compat with major clouds: introduce imds mini client service that
|
||
sets up primary netif in a private netns (ipvlan?) to query imds without
|
||
affecting rest of the host. pick up literal credentials from there plus the
|
||
fields the hwdb reports for the other fields and turn them into credentials.
|
||
then write generator that used detected virtualization info and plugs this
|
||
service into the early boot, waiting for the DMI and network device to show
|
||
up.
|
||
|
||
- for better compat with major clouds: recognize clouds via hwdb on DMI device,
|
||
and add udev properties to it that help with handling IMDS, i.e. entrypoint
|
||
URL, which fields to find ip hostname, ssh key, …
|
||
|
||
- For timer units: add some mechanisms so that timer units that trigger immediately on boot do not have the services
|
||
they run added to the initial transaction and thus confuse Type=idle.
|
||
|
||
- **for vendor-built signed initrds:**
|
||
- kernel-install should be able to install encrypted creds automatically for
|
||
machine id, root pw, rootfs uuid, resume partition uuid, and place next to
|
||
EFI kernel, for sd-stub to pick them up. These creds should be locked to
|
||
the TPM, and bind to the right PCR the kernel is measured to.
|
||
- kernel-install should be able to pick up initrd sysexts automatically and
|
||
place them next to EFI kernel, for sd-stub to pick them up.
|
||
- systemd-fstab-generator should look for rootfs device to mount in creds
|
||
- systemd-resume-generator should look for resume partition uuid in creds
|
||
|
||
- **foreign uid:**
|
||
- add support to export-fs, import-fs
|
||
- systemd-dissect should learn mappings, too, when doing mtree and such
|
||
|
||
- fstab-generator: default to tmpfs-as-root if only usr= is specified on the kernel cmdline
|
||
|
||
- generator that automatically discovers btrfs subvolumes, identifies their purpose based on some xattr on them.
|
||
|
||
- generic interface for varlink for setting log level and stuff that all our daemons can implement
|
||
|
||
- get rid of compat with libbpf.so.0 (retainly only for libbpf.so.1)
|
||
|
||
- Get rid of the symlinks in /run/systemd/units/* and exclusively use cgroupfs
|
||
xattrs to convey info about invocation ids, logging settings and so on.
|
||
support for cgroupfs xattrs in the "trusted." namespace was added in linux
|
||
3.7, i.e. which we don't pretend to support anymore.
|
||
|
||
- go through all --help texts in our codebases, and make sure:
|
||
1. the one sentence description of the tool is highlighted via ANSI how we
|
||
usually do it
|
||
2. If more than one or two commands are supported (as opposed to switches),
|
||
separate commands + switches from each other, using underlined --help sections.
|
||
3. If there are many switches, consider adding additional --help sections.
|
||
|
||
- go through all uses of table_new() in our codebase, and make sure we support
|
||
all three of:
|
||
1. --no-legend properly
|
||
2. --json= properly
|
||
3. --no-pager properly
|
||
|
||
- go through our codebase, and convert "vertical tables" (i.e. things such as
|
||
"systemctl status") to use table_new_vertical() for output
|
||
|
||
- **gpt-auto-generator:**
|
||
- Make /home automount rather than mount?
|
||
|
||
- have a signal that reloads every unit that supports reloading
|
||
|
||
- hibernate/s2h: if swap is on weird storage and refuse if so
|
||
|
||
- homed/pam_systemd: allow authentication by ssh-agent, so that run0/polkit can
|
||
be allowed if caller comes with the right ssh-agent keys.
|
||
|
||
- homed/userdb: maybe define a "companion" dir for home directories where apps
|
||
can safely put privileged stuff in. Would not be writable by the user, but
|
||
still conceptually belong to the user. Would be included in user's quota if
|
||
possible, even if files are not owned by UID of user. Use case: container
|
||
images that owned by arbitrary UIDs, and are owned/managed by the users, but
|
||
are not directly belonging to the user's UID. Goal: we shouldn't place more
|
||
privileged dirs inside of unprivileged dirs, and thus containers really
|
||
should not be placed inside of traditional UNIX home dirs (which are owned by
|
||
users themselves) but somewhere else, that is separate, but still close
|
||
by. Inform user code about path to this companion dir via env var, so that
|
||
container managers find it. the ~/.identity file is also a candidate for a
|
||
file to move there, since it is managed by privileged code (i.e. homed) and
|
||
not unprivileged code.
|
||
|
||
- **homed:**
|
||
- when user tries to log into record signed by unrecognized key, automatically add key to our chain after polkit auth
|
||
- rollback when resize fails mid-operation
|
||
- GNOME's side for forget key on suspend (requires rework so that lock screen runs outside of uid)
|
||
- update LUKS password on login if we find there's a password that unlocks the JSON record but not the LUKS device.
|
||
- create on activate?
|
||
- properties: icon url?, administrator bool (which translates to 'wheel' membership)?, address?, telephone?, vcard?, samba stuff?, parental controls?
|
||
- communicate clearly when usb stick is safe to remove. probably involves
|
||
beefing up logind to make pam session close hook synchronous and wait until
|
||
systemd --user is shut down.
|
||
- logind: maybe keep a "busy fd" as long as there's a non-released session around or the user@.service
|
||
- maybe make automatic, read-only, time-based reflink-copies of LUKS disk
|
||
images (and btrfs snapshots of subvolumes) (think: time machine)
|
||
- distinguish destroy / remove (i.e. currently we can unregister a user, unregister+remove their home directory, but not just remove their home directory)
|
||
- fingerprint authentication, pattern authentication, …
|
||
- make sure "classic" user records can also be managed by homed
|
||
- make size of $XDG_RUNTIME_DIR configurable in user record
|
||
- move acct mgmt stuff from pam_systemd_home to pam_systemd?
|
||
- when "homectl --pkcs11-token-uri=" is used, synthesize ssh-authorized-keys records for all keys we have private keys on the stick for
|
||
- make slice for users configurable (requires logind rework)
|
||
- logind: populate auto-login list bus property from PKCS#11 token
|
||
- when determining state of a LUKS home directory, check DM suspended sysfs file
|
||
- when homed is in use, maybe start the user session manager in a mount namespace with MS_SLAVE,
|
||
so that mounts propagate down but not up - eg, user A setting up a backup volume
|
||
doesn't mean user B sees it
|
||
- use credentials logic/TPM2 logic to store homed signing key
|
||
- permit multiple user record signing keys to be used locally, and pick
|
||
the right one for signing records automatically depending on a pre-existing
|
||
signature
|
||
- add a way to "take possession" of a home directory, i.e. strip foreign signatures
|
||
and insert a local signature instead.
|
||
- as an extension to the directory+subvolume backend: if located on
|
||
especially marked fs, then sync down password into LUKS header of that fs,
|
||
and always verify passwords against it too. Bootstrapping is a problem
|
||
though: if no one is logged in (or no other user even exists yet), how do you
|
||
unlock the volume in order to create the first user and add the first pw.
|
||
- support new FS_IOC_ADD_ENCRYPTION_KEY ioctl for setting up fscrypt
|
||
- maybe pre-create ~/.cache as subvol so that it can have separate quota
|
||
easily?
|
||
- store PKCS#11 + FIDO2 token info in LUKS2 header, compatible with
|
||
systemd-cryptsetup, so that it can unlock homed volumes
|
||
- maybe make all *.home files owned by `systemd-home` user or so, so that we
|
||
can easily set overall quota for all users
|
||
- on login, if we can't fallocate initially, but rebalance is on, then allow
|
||
login in discard mode, then immediately rebalance, then turn off discard
|
||
- add "homectl unbind" command to remove local user record of an inactive
|
||
home dir
|
||
- use systemd-storagetm to expose home dirs via nvme-tcp. Then,
|
||
teach homed/pam_systemd_homed with a user name such as
|
||
lennart%nvme_tcp_192.168.100.77_8787 to log in from any linux host with the
|
||
same home dir. Similar maybe for nbd, iscsi? this should then first ask for
|
||
the local root pw, to authenticate that logging in like this is ok, and would
|
||
then be followed by another password prompt asking for the user's own
|
||
password. Also, do something similar for CIFS: if you log in via
|
||
lennart%cifs-someserver_someshare, then set up the homed dir for it
|
||
automatically. The PAM module should update the user name used for login to
|
||
the short version once it set up the user. Some care should be taken, so that
|
||
the long version can be still be resolved via NSS afterwards, to deal with
|
||
PAM clients that do not support PAM sessions where PAM_USER changes half-way.
|
||
- add a basic form of secrets management to homed, that stores
|
||
secrets in $HOME somewhere, is protected by the accounts own authentication
|
||
mechanisms. Should implement something PKCS#11-like that can be used to
|
||
implement emulated FIDO2 in unpriv userspace on top (which should happen
|
||
outside of homed), emulated PKCS11, and libsecrets support. Operate with a
|
||
2nd key derived from volume key of the user, with which to wrap all
|
||
keys. maintain keys in kernel keyring if possible.
|
||
- when resizing an fs don't sync identity beforehand there might simply
|
||
not be enough disk space for that. try to be defensive and sync only after
|
||
resize.
|
||
- if for some reason the partition ended up being much smaller than
|
||
whole disk, recover from that, and grow it again.
|
||
- if the homed shell fallback thing has access to an SSH agent, try to
|
||
use it to unlock home dir (if ssh-agent forwarding is enabled). We
|
||
could implement SSH unlocking of a homedir with that: when enrolling a new
|
||
ssh pubkey in a user record we'd ask the ssh-agent to sign some random value
|
||
with the privkey, then use that as luks key to unlock the home dir. Will not
|
||
work for ECDSA keys since their signatures contain a random component, but
|
||
will work for RSA and Ed25519 keys.
|
||
|
||
- honour validatefs xattrs in dissect-image.c too
|
||
|
||
- hook up journald with TPMs? measure new journal records to the TPM in regular
|
||
intervals, validate the journal against current TPM state with that. (taking
|
||
inspiration from IMA log)
|
||
|
||
- Hook up journald's FSS logic with TPM2: seal the verification disk by
|
||
time-based policy, so that the verification key can remain on host and be
|
||
validated via TPM.
|
||
|
||
- Hook up systemd-journal-upload with RESTART_RESET=1 logic (should probably
|
||
be conditioned on the num of successfully uploaded entries?)
|
||
|
||
- hostnamectl: show root image uuid
|
||
|
||
- if /usr/bin/swapoff fails due to OOM, log a friendly explanatory message about it
|
||
|
||
- if we fork of a service with StandardOutput=journal, and it forks off a
|
||
subprocess that quickly dies, we might not be able to identify the cgroup it
|
||
comes from, but we can still derive that from the stdin socket its output
|
||
came from. We apparently don't do that right now.
|
||
|
||
- If we try to find a unit via a dangling symlink, generate a clean
|
||
error. Currently, we just ignore it and read the unit from the search
|
||
path anyway.
|
||
|
||
- image policy should be extended to allow dictating *how* a disk is unlocked,
|
||
i.e. root=encrypted-tpm2+encrypted-fido2 would mean "root fs must be
|
||
encrypted and unlocked via fido2 or tpm2, but not otherwise"
|
||
|
||
- imds: maybe do smarter api version handling
|
||
|
||
- implement a varlink registry service, similar to the one of the reference
|
||
implementation, backed by /run/varlink/registry/. Then, also implement
|
||
connect-via-registry-resolution in sd-varlink and varlinkctl. Care needs to
|
||
be taken to do the resolution asynchronousy. Also, note that the Varlink
|
||
reference implementation uses a different address syntax, which needs to be
|
||
taken into account.
|
||
|
||
- implement Distribute= in socket units to allow running multiple
|
||
service instances processing the listening socket, and open this up
|
||
for ReusePort=
|
||
|
||
- **importd/importctl:**
|
||
- complete varlink interface
|
||
- download images into .v/ dirs
|
||
|
||
- importd: support image signature verification with PKCS#7 + OpenBSD signify
|
||
logic, as alternative to crummy gpg
|
||
|
||
- In .socket units, add ConnectStream=, ConnectDatagram=,
|
||
ConnectSequentialPacket= that create a socket, and then *connect to* rather than
|
||
listen on some socket. Then, add a new setting WriteData= that takes some
|
||
base64 data that systemd will write into the socket early on. This can then
|
||
be used to create connections to arbitrary services and issue requests into
|
||
them, as long as the data is static. This can then be combined with the
|
||
aforementioned journald subscription varlink service, to enable
|
||
activation-by-message id and similar.
|
||
|
||
- In DynamicUser= mode: before selecting a UID, use disk quota APIs on relevant
|
||
disks to see if the UID is already in use.
|
||
|
||
- in journald, write out a recognizable log record whenever the system clock is
|
||
changed ("stepped"), and in timesyncd whenever we acquire an NTP fix
|
||
("slewing"). Then, in journalctl for each boot time we come across, find
|
||
these records, and use the structured info they include to display
|
||
"corrected" wallclock time, as calculated from the monotonic timestamp in the
|
||
log record, adjusted by the delta declared in the structured log record.
|
||
|
||
- in journald: whenever we start a new journal file because the boot ID
|
||
changed, let's generate a recognizable log record containing info about old
|
||
and new ID. Then, when displaying log stream in journalctl look for these
|
||
records, to be able to order them.
|
||
|
||
- in networkd, when matching device types, fix up DEVTYPE rubbish the kernel passes to us
|
||
|
||
- in nss-systemd, if we run inside of RootDirectory= with PrivateUsers= set,
|
||
find a way to map the User=/Group= of the service to the right name. This way
|
||
a user/group for a service only has to exist on the host for the right
|
||
mapping to work.
|
||
|
||
- in os-release define a field that can be initialized at build time from
|
||
SOURCE_DATE_EPOCH (maybe even under that name?). Would then be used to
|
||
initialize the timestamp logic of ConditionNeedsUpdate=.
|
||
|
||
- in pid1: include ExecStart= cmdlines (and other Exec*= cmdlines) in polkit
|
||
request, so that policies can match against command lines.
|
||
|
||
- in sd-stub: optionally add support for a new PE section .keyring or so that
|
||
contains additional certificates to include in the Mok keyring, extending
|
||
what shim might have placed there. why? let's say I use "ukify" to build +
|
||
sign my own fedora-based UKIs, and only enroll my personal lennart key via
|
||
shim. Then, I want to include the fedora keyring in it, so that kmods work.
|
||
But I might not want to enroll the fedora key in shim, because this would
|
||
also mean that the key would be in effect whenever I boot an archlinux UKI
|
||
built the same way, signed with the same lennart key.
|
||
|
||
- in the initrd, once the rootfs encryption key has been measured to PCR 15,
|
||
derive default machine ID to use from it, and pass it to host PID 1.
|
||
|
||
- in the initrd: derive the default machine ID to pass to the host PID 1 via
|
||
$machine_id from the same seed credential.
|
||
|
||
- in the long run: permit a system with /etc/machine-id linked to /dev/null, to
|
||
make it lose its identity, i.e. be anonymous. For this we'd have to patch
|
||
through the whole tree to make all code deal with the case where no machine
|
||
ID is available.
|
||
|
||
- In vmspawn/nspawn/machined wait for X_SYSTEMD_UNIT_ACTIVE=ssh-active.target
|
||
and X_SYSTEMD_SIGNALS_LEVEL=2 as indication whether/when SSH and the POSIX
|
||
signals are available. Similar for D-Bus (but just use sockets.target for
|
||
that). Report as property for the machine.
|
||
|
||
- initialize the hostname from the fs label of /, if /etc/hostname does not exist?
|
||
|
||
- initrd: when transitioning from initrd to host, validate that
|
||
/lib/modules/`uname -r` exists, refuse otherwise
|
||
|
||
- instead of going directly for DefineSpace when initializing nvpcrs, check if
|
||
they exist first. apparently DefineSpace is broken on some tpms, and also
|
||
creates log spam if the nvindex already exists.
|
||
|
||
- introduce /etc/boottab or so which lists block devices that bootctl +
|
||
kernel-install shall update the ESPs on (and register in EFI BootXYZ
|
||
variables), in addition to whatever is currently the booted /usr/.
|
||
systemd-sysupdate should also take it into consideration and update the
|
||
/usr/ images on all listed devices.
|
||
|
||
- introduce a .acpitable section for early ACPI table override
|
||
|
||
- Introduce a CGroupRef structure, inspired by PidRef. Should contain cgroup
|
||
path, cgroup id, and cgroup fd. Use it to continuously pin all v2 cgroups via
|
||
a cgroup_ref field in the CGroupRuntime structure. Eventually switch things
|
||
over to do all cgroupfs access only via that structure's fd.
|
||
|
||
- introduce a new group to own TPM devices
|
||
|
||
- introduce an option (or replacement) for "systemctl show" that outputs all
|
||
properties as JSON, similar to busctl's new JSON output. In contrast to that
|
||
it should skip the variant type string though.
|
||
|
||
- introduce DefaultSlice= or so in system.conf that allows changing where we
|
||
place our units by default, i.e. change system.slice to something
|
||
else. Similar, ManagerSlice= should exist so that PID1's own scope unit could
|
||
be moved somewhere else too. Finally machined and logind should get similar
|
||
options so that it is possible to move user session scopes and machines to a
|
||
different slice too by default. Use case: people who want to put resources on
|
||
the entire system, with the exception of one specific service. See:
|
||
https://lists.freedesktop.org/archives/systemd-devel/2018-February/040369.html
|
||
|
||
- introduce mntid_t, and make it 64bit, as apparently the kernel switched to
|
||
64bit mount ids
|
||
|
||
- introduce new ANSI sequence for communicating log level and structured error
|
||
metadata to terminals.
|
||
|
||
- introduce new structure Tpm2CombinedPolicy, that combines the various TPm2
|
||
policy bits into one structure, i.e. public key info, pcr masks, pcrlock
|
||
stuff, pin and so on. Then pass that around in tpm2_seal() and tpm2_unseal().
|
||
|
||
- introduce per-unit (i.e. per-slice, per-service) journal log size limits.
|
||
|
||
- investigate whether the gnome pty helper should be moved into systemd, to provide cgroup support.
|
||
|
||
- **journal:**
|
||
- consider introducing implicit _TTY= + _PPID= + _EUID= + _EGID= + _FSUID= + _FSGID= fields
|
||
- journald: also get thread ID from client, plus thread name
|
||
- journal: when waiting for journal additions in the client always sleep at least 1s or so, in order to minimize wakeups
|
||
- add API to close/reopen/get fd for journal client fd in libsystemd-journal.
|
||
- fall back to /dev/log based logging in libsystemd-journal, if we cannot log natively?
|
||
- declare the local journal protocol stable in the wiki interface chart
|
||
- sd-journal: speed up sd_journal_get_data() with transparent hash table in bg
|
||
- journald: when dropping msgs due to ratelimit make sure to write
|
||
"dropped %u messages" not only when we are about to print the next
|
||
message that works, but already after a short timeout
|
||
- check if we can make journalctl by default use --follow mode inside of less if called without args?
|
||
- maybe add API to send pairs of iovecs via sd_journal_send
|
||
- journal: add a setgid "systemd-journal" utility to invoke from libsystemd-journal, which passes fds via STDOUT and does PK access
|
||
- journalctl: support negative filtering, i.e. FOOBAR!="waldo",
|
||
and !FOOBAR for events without FOOBAR.
|
||
- journal: store timestamp of journal_file_set_offline() in the header,
|
||
so it is possible to display when the file was last synced.
|
||
- journal-send.c, log.c: when the log socket is clogged, and we drop, count this and write a message about this when it gets unclogged again.
|
||
- journal: find a way to allow dropping history early, based on priority, other rules
|
||
- journal: When used on NFS, check payload hashes
|
||
- journald: add kernel cmdline option to disable ratelimiting for debug purposes
|
||
- refuse taking lower-case variable names in sd_journal_send() and friends.
|
||
- journald: we currently rotate only after MaxUse+MaxFilesize has been reached.
|
||
- journal: deal nicely with byte-by-byte copied files, especially regards header
|
||
- journal: sanely deal with entries which are larger than the individual file size, but where the components would fit
|
||
- Replace utmp, wtmp, btmp, and lastlog completely with journal
|
||
- journalctl: instead --after-cursor= maybe have a --cursor=XYZ+1 syntax?
|
||
- when a kernel driver logs in a tight loop, we should ratelimit that too.
|
||
- journald: optionally, log debug messages to /run but everything else to /var
|
||
- journald: when we drop syslog messages because the syslog socket is
|
||
full, make sure to write how many messages are lost as first thing
|
||
to syslog when it works again.
|
||
- journald: allow per-priority and per-service retention times when rotating/vacuuming
|
||
- journald: make use of uid-range.h to manage uid ranges to split
|
||
journals in.
|
||
- journalctl: add the ability to look for the most recent process of a binary.
|
||
journalctl /usr/bin/X11 --invocation=-1
|
||
- systemctl: change 'status' to show logs for the last invocation, not a fixed
|
||
number of lines
|
||
- improve journalctl performance by loading journal files
|
||
lazily. Encode just enough information in the file name, so that we
|
||
do not have to open it to know that it is not interesting for us, for
|
||
the most common operations.
|
||
- man: document that corrupted journal files is nothing to act on
|
||
- rework journald sigbus stuff to use mutex
|
||
- Set RLIMIT_NPROC for systemd-journal-xyz, and all other of our
|
||
services that run under their own user ids, and use User= (but only
|
||
in a world where userns is ubiquitous since otherwise we cannot
|
||
invoke those daemons on the host AND in a container anymore). Also,
|
||
if LimitNPROC= is used without User= we should warn and refuse
|
||
operation.
|
||
- journalctl --verify: don't show files that are currently being
|
||
written to as FAIL, but instead show that they are being written to.
|
||
- add journalctl -H that talks via ssh to a remote peer and passes through
|
||
binary logs data
|
||
- add a version of --merge which also merges /var/log/journal/remote
|
||
- journalctl: -m should access container journals directly by enumerating
|
||
them via machined, and also watch containers coming and going.
|
||
Benefit: nspawn --ephemeral would start working nicely with the journal.
|
||
- assign MESSAGE_ID to log messages about failed services
|
||
- check if loop in decompress_blob_xz() is necessary
|
||
- log pidfid as another field, i.e. _PIDFDID=
|
||
- beef up ClientContext logic to store pidfd_id of peer, to validate
|
||
we really use the right cache entry
|
||
- log client's pidfd id as a new automatic field _PIDFDID= or so.
|
||
- split up ClientContext cache in two: one cache keyed by pid/pidfdid
|
||
with process information, and another one keyed by cgroup path/cgroupid with
|
||
cgroup information. This way if a service consisting of many logging
|
||
processes can take benefit of the cgroup caching.
|
||
- support RFC3164 fully for the incoming syslog transport, see
|
||
https://github.com/systemd/systemd/issues/19251#issuecomment-816601955
|
||
- add varlink service that allows subscribing to certain log events,
|
||
for example matching by message ID, or log level returns a list of journal
|
||
cursors as they happen.
|
||
- also collect CLOCK_BOOTTIME timestamps per log entry. Then, derive
|
||
"corrected" CLOCK_REALTIME information on display from that and the timestamp
|
||
info of the newest entry of the specific boot (as identified by the boot
|
||
ID). This way, if a system comes up without a valid clock but acquires a
|
||
better clock later, we can "fix" older entry timestamps on display, by
|
||
calculating backwards. We cannot use CLOCK_MONOTONIC for this, since it does
|
||
not account for suspend phases. This would then also enable us to correct the
|
||
kmsg timestamping we consume (where we erroneously assume the clock was in
|
||
CLOCK_MONOTONIC, but it actually is CLOCK_BOOTTIME as per kernel).
|
||
- generate recognizable log events whenever we shutdown journald
|
||
cleanly, and when we migrate run → var. This way tools can verify that a
|
||
previous boot terminated cleanly, because either of these two messages must
|
||
be safely written to disk, then.
|
||
- do journal file writing out-of-process, with one writer process per
|
||
client UID, so that synthetic hash table collisions can slow down a specific
|
||
user's journal stream down but not the others.
|
||
- make sure -f ends when the container indicated by -M terminates
|
||
- sigbus API via a signal-handler safe function that people may call
|
||
from the SIGBUS handler
|
||
|
||
- journalctl/timesyncd: whenever timesyncd acquires a synchronization from NTP,
|
||
create a structured log entry that contains boot ID, monotonic clock and
|
||
realtime clock (I mean, this requires no special work, as these three fields
|
||
are implicit). Then in journalctl when attempting to display the realtime
|
||
timestamp of a log entry, first search for the closest later log entry
|
||
of this kinda that has a matching boot id, and convert the monotonic clock
|
||
timestamp of the entry to the realtime clock using this info. This way we can
|
||
retroactively correct the wallclock timestamps, in particular for systems
|
||
without RTC, i.e. where initially wallclock timestamps carry rubbish, until
|
||
an NTP sync is acquired.
|
||
|
||
- landlock: for unprivileged systemd (i.e. systemd --user), use landlock to
|
||
implement ProtectSystem=, ProtectHome= and so on. Landlock does not require
|
||
privs, and we can implement pretty similar behaviour. Also, maybe add a mode
|
||
where ProtectSystem= combined with an explicit PrivateMounts=no could request
|
||
similar behaviour for system services, too.
|
||
|
||
- landlock: lock down RuntimeDirectory= via landlock, so that services lose
|
||
ability to write anywhere else below /run/. Similar for
|
||
StateDirectory=. Benefit would be clear delegation via unit files: services
|
||
get the directories they get, and nothing else even if they wanted to.
|
||
|
||
- Lennart: big blog story about "why systemd-boot"
|
||
|
||
- Lennart: big blog story about building initrds
|
||
|
||
- Lennart: big blog story about DDIs
|
||
|
||
- let's not GC a unit while its ratelimits are still pending
|
||
|
||
- libsystemd-journal, libsystemd-login, libudev: add calls to easily attach these objects to sd-event event loops
|
||
|
||
- lock down acceptable encrypted credentials at boot, via simple allowlist,
|
||
maybe on kernel command line:
|
||
systemd.import_encrypted_creds=foobar.waldo,tmpfiles.extra to protect locked
|
||
down kernels from credentials generated on the host with a weak kernel
|
||
|
||
- lock down swtpm a bit to make it harder to extract keys from it as it is
|
||
running. i.e. make ptracing + termination hard from the outside. also run
|
||
swtpm as unpriv user (not trivial, probably requires patch swtpm, as it needs
|
||
to allocate vtpm device), to lock it down from the inside.
|
||
|
||
- loginctl: show "service identifier" in tabular list-sessions output, to make
|
||
run0 sessions easily visible.
|
||
|
||
- loginctl: show argv[] of "leader" process in tabular list-sessions output
|
||
|
||
- **logind:**
|
||
- logind: optionally, ignore idle-hint logic for autosuspend, block suspend as long as a session is around
|
||
- logind: wakelock/opportunistic suspend support
|
||
- Add pretty name for seats in logind
|
||
- logind: allow showing logout dialog from system?
|
||
- add Suspend() bus calls which take timestamps to fix double suspend issues when somebody hits suspend and closes laptop quickly.
|
||
- if pam_systemd is invoked by su from a process that is outside of a
|
||
any session we should probably just become a NOP, since that's
|
||
usually not a real user session but just some system code that just
|
||
needs setuid().
|
||
- logind: make the Suspend()/Hibernate() bus calls wait for the for
|
||
the job to be completed. before returning, so that clients can wait
|
||
for "systemctl suspend" to finish to know when the suspending is
|
||
complete.
|
||
- logind: when the power button is pressed short, just popup a
|
||
logout dialog. If it is pressed for 1s, do the usual
|
||
shutdown. Inspiration are Macs here.
|
||
- expose "Locked" property on logind session objects
|
||
- maybe allow configuration of the StopTimeout for session scopes
|
||
- rename session scope so that it includes the UID. THat way
|
||
the session scope can be arranged freely in slices and we don't have
|
||
make assumptions about their slice anymore.
|
||
- follow PropertiesChanged state more closely, to deal with quick logouts and
|
||
relogins
|
||
- (optionally?) spawn seat-manager@$SEAT.service whenever a seat shows up that as CanGraphical set
|
||
- invoke a service manager for "area" logins too. i.e. instantiate
|
||
user@.service also for logins where XDG_AREA is set, in per-area fashion, and
|
||
ref count it properly. Benefit: graphical logins should start working with
|
||
the area logic.
|
||
- when logging in, always take an fd to the home dir, to keep the dir
|
||
busy, so that autofs release can never happen. (this is generally a good
|
||
idea, and specifically works around the fact the autofs ignores busy by mount
|
||
namespaces)
|
||
|
||
- look at nsresourced, mountfsd, homed, importd, portabled, and try to come up
|
||
with a way how the forked off worker processes can be moved into transient
|
||
services with sandboxing, without breaking notify socket stuff and so on.
|
||
|
||
- **machined:**
|
||
- add an API so that libvirt-lxc can inform us about network interfaces being
|
||
removed or added to an existing machine
|
||
- "machinectl migrate" or similar to copy a container from or to a
|
||
difference host, via ssh
|
||
- introduce systemd-nspawn-ephemeral@.service, and hook it into
|
||
"machinectl start" with a new --ephemeral switch
|
||
- "machinectl status" should also show internal logs of the container in
|
||
question
|
||
- "machinectl history"
|
||
- "machinectl diff"
|
||
- "machinectl commit" that takes a writable snapshot of a tree, invokes a
|
||
shell in it, and marks it read-only after use
|
||
- gc for OCI layers that are not referenced anymore by any .mstack/ links.
|
||
- optionally track nspawn unix-export/ runtime for each machined, and
|
||
then update systemd-ssh-proxy so that it can connect to that.
|
||
|
||
- make "bootctl install" + "bootctl update" useful for installing shim too. For
|
||
that introduce new dir /usr/lib/systemd/efi/extra/ which we copy mostly 1:1
|
||
into the ESP at install time. Then make the logic smart enough so that we
|
||
don't overwrite bootx64.efi with our own if the extra tree already contains
|
||
one. Also, follow symlinks when copying, so that shim rpm can symlink their
|
||
stuff into our dir (which is safe since the target ESP is generally VFAT and
|
||
thus does not have symlinks anyway). Later, teach the update logic to look at
|
||
the ELF package metadata (which we also should include in all PE files, see
|
||
above) for version info in all *.EFI files, and use it to only update if
|
||
newer.
|
||
|
||
- make cryptsetup lower --iter-time
|
||
|
||
- Make it possible to set the keymap independently from the font on
|
||
the kernel cmdline. Right now setting one resets also the other.
|
||
|
||
- make killing more debuggable: when we kill a service do so setting the
|
||
.si_code field with a little bit of info. Specifically, we can set a
|
||
recognizable value to first of all indicate that it's systemd that did the
|
||
killing. Secondly, we can give a reason for the killing, i.e. OOM or so, and
|
||
also the phase we are in, and which process we think we are killing (i.e.
|
||
main vs control process, useful in case of sd_notify() MAINPID= debugging).
|
||
Net result: people who try to debug why their process gets killed should have
|
||
some minimal, nice metadata directly on the signal event.
|
||
|
||
- make MAINPID= message reception checks even stricter: if service uses User=,
|
||
then check sending UID and ignore message if it doesn't match the user or
|
||
root.
|
||
|
||
- make nspawn containers, portable services and vmspawn VMs optionally survive
|
||
soft reboot wholesale.
|
||
|
||
- Make nspawn to a frontend for systemd-executor, so that we have to ways into
|
||
the executor: via unit files/dbus/varlink through PID1 and via cmdline/OCI
|
||
through nspawn.
|
||
|
||
- make persistent restarts easier by adding a new setting OpenPersistentFile=
|
||
or so, which allows opening one or more files that is "persistent" across
|
||
service restarts, hot reboot, cold reboots (depending on configuration): the
|
||
files are created empty on first invocation, and on subsequent invocations
|
||
the files are reboot. The files would be backed by tmpfs, pmem or /var
|
||
depending on desired level of persistency.
|
||
|
||
- make repeated alt-ctrl-del presses printing a dump
|
||
|
||
- make rfkill uaccess controllable by default, i.e. steal rule from
|
||
gnome-bluetooth and friends
|
||
|
||
- Make run0 forward various signals to the forked process so that sending
|
||
signals to a child process works roughly the same regardless of whether the
|
||
child process is spawned via run0 or not.
|
||
|
||
- make sure systemd-ask-password-wall does not shutdown systemd-ask-password-console too early
|
||
|
||
- make sure the ratelimit object can deal with USEC_INFINITY as way to turn off things
|
||
|
||
- make systemd work nicely without /bin/sh, logins and associated shell tools around
|
||
- make sure debug shell service (sushell) has a nice failure mode, prints a message and reboots
|
||
- varlink interface for "systemctl start" and friends
|
||
- https://github.com/util-linux/util-linux/issues/4117
|
||
|
||
- make the systemd-repart "seed" value provisionable via credentials, so that
|
||
confidential computing environments can set it and deterministically
|
||
enforce the uuids for partitions created, so that they can calculate PCR 15
|
||
ahead of time.
|
||
|
||
- make use of ethtool veth peer info in machined, for automatically finding out
|
||
host-side interface pointing to the container.
|
||
|
||
- make use of new glibc 2.32 APIs sigabbrev_np().
|
||
|
||
- make vmspawn/nspawn/importd/machined a bit more usable in a WSL-like
|
||
fashion. i.e. teach unpriv systemd-vmspawn/systemd-nspawn a reasonable
|
||
--bind-user= behaviour that mounts the calling user through into the
|
||
machine. Then, ship importd with a small database of well known distro images
|
||
along with their pinned signature keys. Then add some minimal glue that binds
|
||
this together: downloads a suitable image if not done so yet, starts it in
|
||
the bg via vmspawn/nspawn if not done so yet and then requests a shell inside
|
||
it for the invoking user.
|
||
|
||
- 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.
|
||
|
||
- man: the documentation of Restart= currently is very misleading and suggests the tools from ExecStartPre= might get restarted.
|
||
|
||
- maybe add a new standard slice where process that are started in the initrd
|
||
and stick around for the whole system runtime (i.e. root fs storage daemons,
|
||
the bpf loader daemon discussed above, and such) are placed. maybe
|
||
protected.slice or so? Then write docs that suggest that services like this
|
||
set Slice=protected.slice, RefuseManualStart=yes, RefuseManualStop=yes and a
|
||
couple of other things.
|
||
|
||
- maybe add call sd_journal_set_block_timeout() or so to set SO_SNDTIMEO for
|
||
the sd-journal logging socket, and, if the timeout is set to 0, sets
|
||
O_NONBLOCK on it. That way people can control if and when to block for
|
||
logging.
|
||
|
||
- maybe add kernel cmdline params: to force random seed crediting
|
||
|
||
- maybe add new flags to gpt partition tables for rootfs and usrfs indicating
|
||
purpose, i.e. whether something is supposed to be bootable in a VM, on
|
||
baremetal, on an nspawn-style container, if it is a portable service image,
|
||
or a sysext for initrd, for host os, or for portable container. Then hook
|
||
portabled/… up to udev to watch block devices coming up with the flags set, and
|
||
use it.
|
||
|
||
- maybe add support for binding and connecting AF_UNIX sockets in the file
|
||
system outside of the 108ch limit. When connecting, open O_PATH fd to socket
|
||
inode first, then connect to /proc/self/fd/XYZ. When binding, create symlink
|
||
to target dir in /tmp, and bind through it.
|
||
|
||
- Maybe add SwitchRootEx() as new bus call that takes env vars to set for new
|
||
PID 1 as argument. When adding SwitchRootEx() we should maybe also add a
|
||
flags param that allows disabling and enabling whether serialization is
|
||
requested during switch root.
|
||
|
||
- maybe allow timer units with an empty Units= setting, so that they
|
||
can be used for resuming the system but nothing else.
|
||
|
||
- maybe beef up sd-event: optionally, allow sd-event to query the timestamp of
|
||
next pending datagram inside a SOCK_DGRAM IO fd, and order event source
|
||
dispatching by that. Enable this on the native + syslog sockets in journald,
|
||
so that we add correct ordering between the two. Use MSG_PEEK + SCM_TIMESTAMP
|
||
for this.
|
||
|
||
- maybe define a /etc/machine-info field for the ANSI color to associate with a
|
||
hostname. Then use it for the shell prompt to highlight the hostname. If no
|
||
color is explicitly set, hash a color automatically from the hostname as a
|
||
fallback, in a reasonable way. Take inspiration from the ANSI_COLOR= field
|
||
that already exists in /etc/os-release, i.e. use the same field name and
|
||
syntax. When hashing the color, use the hsv_to_rgb() helper we already have,
|
||
fixate S and V to something reasonable and constant, and derive the H from
|
||
the hostname. Ultimate goal with this: give people a visual hint about the
|
||
system they are on if the have many to deal with, by giving each a color
|
||
identity. This code should be placed in hostnamed, so that clients can query
|
||
the color via varlink or dbus.
|
||
|
||
- maybe do not install getty@tty1.service symlink in /etc but in /usr?
|
||
|
||
- maybe extend .path units to expose fanotify() per-mount change events
|
||
|
||
- maybe extend the capsule concept to the per-user instance too: invokes a
|
||
systemd --user instance with a subdir of $HOME as $HOME, and a subdir of
|
||
$XDG_RUNTIME_DIR as $XDG_RUNTIME_DIR.
|
||
|
||
- Maybe extend the service protocol to support handling of some specific SIGRT
|
||
signal for setting service log level, that carries the level via the
|
||
sigqueue() data parameter. Enable this via unit file setting.
|
||
|
||
- maybe implicitly attach monotonic+realtime timestamps to outgoing messages in
|
||
log.c and sd-journal-send
|
||
|
||
- maybe introduce "@icky" as a seccomp filter group, which contains acct() and
|
||
certain other syscalls that aren't quite obsolete, but certainly icky.
|
||
|
||
- Maybe introduce a helper safe_exec() or so, which is to execve() which
|
||
safe_fork() is to fork(). And then make revert the RLIMIT_NOFILE soft limit
|
||
to 1K implicitly, unless explicitly opted-out.
|
||
|
||
- maybe introduce a new partition that we can store debug logs and similar at
|
||
the very last moment of shutdown. idea would be to store reference to block
|
||
device (major + minor + partition id + diskseq?) in /run somewhere, than use
|
||
that from systemd-shutdown, just write a raw JSON blob into the partition.
|
||
Include timestamp, boot id and such, plus kmsg. on next boot immediately
|
||
import into journal. maybe use timestamp for making clock more monotonic.
|
||
also use this to detect unclean shutdowns, boot into special target if
|
||
detected
|
||
|
||
- maybe introduce a new per-unit drop-in directory .confext.d/ that may contain
|
||
symlinks to confext images to enable for the unit.
|
||
|
||
- Maybe introduce an InodeRef structure inspired by PidRef, which references a
|
||
specific inode, and combines: a path, an O_PATH fd, and possibly a FID into
|
||
one. Why? We often pass around path and fd separately in chaseat() and similar
|
||
calls. Because passing around both separately is cumbersome we sometimes pass
|
||
only one, sometimes the other, and sometimes both. It would make the code a
|
||
lot simpler if we could pass both around at the same time in a simple way, via
|
||
an InodeRef which *both* pins the inode via an fd, *and* gives us a friendly
|
||
name for it.
|
||
|
||
- maybe introduce an OSC sequence that signals when we ask for a password, so
|
||
that terminal emulators can maybe connect a password manager or so, and
|
||
highlight things specially.
|
||
|
||
- maybe introduce container-shell@.service or so, to match
|
||
container-getty.service but skips authentication, so you get a shell prompt
|
||
directly. Usecase: wsl-like stuff (they have something pretty much like
|
||
that). Question: how to pick user for this. Instance parameter? somehow from
|
||
credential (would probably require some binary that converts credential to
|
||
User= parameter?
|
||
|
||
- maybe introduce xattrs that can be set on the root dir of the root fs
|
||
partition that declare the volatility mode to use the image in. Previously I
|
||
thought marking this via GPT partition flags but that's not ideal since
|
||
that's outside of the LUKS encryption/verity verification, and we probably
|
||
shouldn't operate in a volatile mode unless we got told so from a trusted
|
||
source.
|
||
|
||
- maybe prohibit setuid() to the nobody user, to lock things down, via seccomp.
|
||
the nobody is not a user any code should run under, ever, as that user would
|
||
possibly get a lot of access to resources it really shouldn't be getting
|
||
access to due to the userns + nfs semantics of the user. Alternatively: use
|
||
the seccomp log action, and allow it.
|
||
|
||
- maybe reconsider whether virtualization consoles (hvc1) are considered local
|
||
or remote. i.e. are they more like an ssh login, or more like a /dev/tty1
|
||
login? Lennart used to believe the former, but maybe the latter is more
|
||
appropriate? This has effect on polkit interactivity, since it would mean
|
||
questions via hvc0 would suddenly use the local polkit property. But this
|
||
also raises the question whether such sessions shall be considered active or
|
||
not
|
||
|
||
- Maybe rename pkcs7 and public verbs of systemd-keyutil to be more verb like.
|
||
|
||
- maybe rework systemd-modules-load to be a generator that just instantiates
|
||
modprobe@.service a bunch of times
|
||
|
||
- maybe teach repart.d/ dropins a new setting MakeMountNodes= or so, which is
|
||
just like MakeDirectories=, but uses an access mode of 0000 and sets the +i
|
||
chattr bit. This is useful as protection against early uses of /var/ or /tmp/
|
||
before their contents is mounted.
|
||
|
||
- maybe trigger a uevent "change" on a device if "systemctl reload xyz.device"
|
||
is issued.
|
||
|
||
- maybe: in PID1, when we detect we run in an initrd, make superblock read-only
|
||
early on, but provide opt-out via kernel cmdline.
|
||
|
||
- measure GPT and LUKS headers somewhere when we use them (i.e. in
|
||
systemd-gpt-auto-generator/systemd-repart and in systemd-cryptsetup?)
|
||
|
||
- measure some string via pcrphase whenever we end up booting into emergency
|
||
mode.
|
||
|
||
- measure some string via pcrphase whenever we resume from hibernate
|
||
|
||
- Merge systemd-creds options --uid= (which accepts user names) and --user.
|
||
|
||
- merge unit_kill_common() and unit_kill_context()
|
||
|
||
- mount /tmp/ and /var/tmp with a uidmap applied that blocks out "nobody" user
|
||
among other things such as dynamic uid ranges for containers and so on. That
|
||
way no one can create files there with these uids and we enforce they are only
|
||
used transiently, never persistently.
|
||
|
||
- mount /var/ from initrd, so that we can apply sysext and stuff before the
|
||
initrd transition. Specifically:
|
||
1. There should be a var= kernel cmdline option, matching root= and usr=
|
||
2. systemd-gpt-auto-generator should auto-mount /var if it finds it on disk
|
||
3. mount.x-initrd mount option in fstab should be implied for /var
|
||
|
||
- mount most file systems with a restrictive uidmap. e.g. mount /usr/ with a
|
||
uidmap that blocks out anything outside 0…1000 (i.e. system users) and similar.
|
||
|
||
- mount the root fs with MS_NOSUID by default, and then mount /usr/ without
|
||
both so that suid executables can only be placed there. Do this already in
|
||
the initrd. If /usr/ is not split out create a bind mount automatically.
|
||
|
||
- mount: turn dependency information from /proc/self/mountinfo into dependency information between systemd units.
|
||
|
||
- MountFlags=shared acts as MountFlags=slave right now.
|
||
|
||
- **mountfsd/nsresourced:**
|
||
- userdb: maybe allow callers to map one uid to their own uid
|
||
- bpflsm: allow writes if resulting UID on disk would be userns' owner UID
|
||
- make encrypted DDIs work (password…)
|
||
- add API for creating a new file system from scratch (together with some
|
||
dm-integrity/HMAC key). Should probably work using systemd-repart (access
|
||
via varlink).
|
||
- add api to make an existing file "trusted" via dm-integry/HMAC key
|
||
- port: portabled
|
||
- port: tmpfiles, sysusers and similar
|
||
- lets see if we can make runtime bind mounts into unpriv nspawn work
|
||
|
||
- move documentation about our common env vars (SYSTEMD_LOG_LEVEL,
|
||
SYSTEMD_PAGER, …) into a man page of its own, and just link it from our
|
||
various man pages that so far embed the whole list again and again, in an
|
||
attempt to reduce clutter and noise a bid.
|
||
|
||
- move multiseat vid/pid matches from logind udev rule to hwdb
|
||
|
||
- Move RestrictAddressFamily= to the new cgroup create socket
|
||
|
||
- networkd's resolved hook: optionally map all lease IP addresses handed out to
|
||
the same hostname which is configured on the .network file. Optionally, even
|
||
derive this single name from the network interface name (i.e. probably
|
||
altname or so). This way, when spawning a VM the host could pick the hostname
|
||
for it and the client gets no say.
|
||
|
||
- networkd/machined: implement reverse name lookups in the resolved hook
|
||
|
||
- networkd: maintain a file in /run/ that can be symlinked into /run/issue.d/
|
||
that always shows the current primary IP address
|
||
|
||
- **networkd:**
|
||
- add more keys to [Route] and [Address] sections
|
||
- add support for more DHCPv4 options (and, longer term, other kinds of dynamic config)
|
||
- add reduced [Link] support to .network files
|
||
- properly handle routerless dhcp leases
|
||
- work with non-Ethernet devices
|
||
- dhcp: do we allow configuring dhcp routes on interfaces that are not the one we got the dhcp info from?
|
||
- the DHCP lease data (such as NTP/DNS) is still made available when
|
||
a carrier is lost on a link. It should be removed instantly.
|
||
- expose in the API the following bits:
|
||
- option 15, domain name
|
||
- option 12, hostname and/or option 81, fqdn
|
||
- option 123, 144, geolocation
|
||
- option 252, configure http proxy (PAC/wpad)
|
||
- provide a way to define a per-network interface default metric value
|
||
for all routes to it. possibly a second default for DHCP routes.
|
||
- allow Name= to be specified repeatedly in the [Match] section. Maybe also
|
||
support Name=foo*|bar*|baz ?
|
||
- whenever uplink info changes, make DHCP server send out FORCERENEW
|
||
|
||
- nspawn/vmspawn/pid1: add ability to easily insert fully booted VMs/FOSC into
|
||
shell pipelines, i.e. add easy to use switch that turns off console status
|
||
output, and generates the right credentials for systemd-run-generator so that
|
||
a program is invoked, and its output captured, with correct EOF handling and
|
||
exit code propagation
|
||
|
||
- nspawn/vmspawn: define hotkey that one can hit on the primary interface to
|
||
ask for a friendly, acpi style shutdown.
|
||
|
||
- **nspawn:**
|
||
- emulate /dev/kmsg using CUSE and turn off the syslog syscall
|
||
with seccomp. That should provide us with a useful log buffer that
|
||
systemd can log to during early boot, and disconnect container logs
|
||
from the kernel's logs.
|
||
- as soon as networkd has a bus interface, hook up --network-interface=,
|
||
--network-bridge= with networkd, to trigger netdev creation should an
|
||
interface be missing
|
||
- a nice way to boot up without machine id set, so that it is set at boot
|
||
automatically for supporting --ephemeral. Maybe hash the host machine id
|
||
together with the machine name to generate the machine id for the container
|
||
- fix logic always print a final newline on output.
|
||
https://github.com/systemd/systemd/pull/272#issuecomment-113153176
|
||
- should optionally support receiving WATCHDOG=1 messages from its payload
|
||
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
|
||
takes one or more arguments, and applies the extensions already during
|
||
startup.
|
||
- when main nspawn supervisor process gets suspended due to SIGSTOP/SIGTTOU
|
||
or so, freeze the payload too.
|
||
- support time namespaces
|
||
- 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.
|
||
- The subreaper logic we currently have seems overly complex. We should
|
||
investigate whether creating the inner child with CLONE_PARENT isn't better.
|
||
- Reduce the number of sockets that are currently in use and just rely on one
|
||
or two sockets.
|
||
- map foreign UID range through 1:1
|
||
- systemd-nspawn should get the same SSH key support that vmspawn now has.
|
||
|
||
- oci: add support for "importctl import-oci" which implements the "OCI layout"
|
||
spec (i.e. acquiring via local fs access), as opposed to the current
|
||
"importctl pull-oci" which focuses on the "OCI image spec", i.e. downloads
|
||
from the web (i.e. acquiring via URLs).
|
||
|
||
- oci: add support for blake hashes for layers
|
||
|
||
- oci: support "data" in any OCI descriptor, not just manifest config.
|
||
|
||
- On boot, auto-generate an asymmetric key pair from the TPM,
|
||
and use it for validating DDIs and credentials. Maybe upload it to the kernel
|
||
keyring, so that the kernel does this validation for us for verity and kernel
|
||
modules
|
||
|
||
- on shutdown: move utmp, wall, audit logic all into PID 1 (or logind?)
|
||
|
||
- once swtpm's sd_notify() support has landed in the distributions, remove the
|
||
invocation in tpm2-swtpm.c and let swtpm handle it.
|
||
|
||
- Once the root fs LUKS volume key is measured into PCR 15, default to binding
|
||
credentials to PCR 15 in "systemd-creds"
|
||
|
||
- optionally, also require WATCHDOG=1 notifications during service start-up and shutdown
|
||
|
||
- optionally, collect cgroup resource data, and store it in per-unit RRD files,
|
||
suitable for processing with rrdtool. Add bus API to access this data, and
|
||
possibly implement a CPULoad property based on it.
|
||
|
||
- optionally: turn on cgroup delegation for per-session scope units
|
||
|
||
- pam_systemd: on interactive logins, maybe show SUPPORT_END information at
|
||
login time, à la motd
|
||
|
||
- pam_systemd_home: add module parameter to control whether to accept only
|
||
password or only pkcs11/fido2 auth, and then use this to hook nicely into two
|
||
of the three PAM stacks gdm provides.
|
||
See discussion at https://github.com/authselect/authselect/pull/311
|
||
|
||
- paranoia: whenever we process passwords, call mlock() on the memory
|
||
first. i.e. look for all places we use free_and_erasep() and
|
||
augment them with mlock(). Also use MADV_DONTDUMP.
|
||
Alternatively (preferably?) use memfd_secret().
|
||
|
||
- pcrextend/tpm2-util: add a concept of "rotation" to event log. i.e. allow
|
||
trailing parts of the logs if time or disk space limit is hit. Protect the
|
||
boot-time measurements however (i.e. up to some point where things are
|
||
settled), since we need those for pcrlock measurements and similar. When
|
||
deleting entries for rotation, place an event that declares how many items
|
||
have been dropped, and what the hash before and after that.
|
||
|
||
- pcrextend: after measuring get an immediate quote from the TPM, and validate
|
||
it. if it doesn't check out, i.e. the measurement we made doesn't appear in
|
||
the PCR then also reboot.
|
||
|
||
- pcrextend: maybe add option to disable measurements entirely via kernel cmdline
|
||
|
||
- pcrextend: when we fail to measure, reboot the system (at least optionally).
|
||
important because certain measurements are supposed to "destroy" tpm object
|
||
access.
|
||
|
||
- pcrlock: add support for multi-profile UKIs
|
||
|
||
- **pcrlock:**
|
||
- add kernel-install plugin that automatically creates UKI .pcrlock file when
|
||
UKI is installed, and removes it when it is removed again
|
||
- automatically install PE measurement of sd-boot on "bootctl install"
|
||
- pre-calc sysext + kernel cmdline measurements
|
||
- pre-calc cryptsetup root key measurement
|
||
- maybe make systemd-repart generate .pcrlock for old and new GPT header in
|
||
/run?
|
||
- Add support for more than 8 branches per PCR OR
|
||
- add "systemd-pcrlock lock-kernel-current" or so which synthesizes .pcrlock
|
||
policy from currently booted kernel/event log, to close gap for first boot
|
||
for pre-built images
|
||
|
||
- per-service sandboxing option: ProtectIds=. If used, will overmount
|
||
/etc/machine-id and /proc/sys/kernel/random/boot_id with synthetic files, to
|
||
make it harder for the service to identify the host. Depending on the user
|
||
setting it should be fully randomized at invocation time, or a hash of the
|
||
real thing, keyed by the unit name or so. Of course, there are other ways to
|
||
get these IDs (e.g. journal) or similar ids (e.g. MAC addresses, DMI ids, CPU
|
||
ids), so this knob would only be useful in combination with other lockdown
|
||
options. Particularly useful for portable services, and anything else that
|
||
uses RootDirectory= or RootImage=. (Might also over-mount
|
||
/sys/class/dmi/id/*{uuid,serial} with /dev/null).
|
||
|
||
- Permit masking specific netlink APIs with RestrictAddressFamily=
|
||
|
||
- pick up creds from EFI vars
|
||
|
||
- PID 1 should send out sd_notify("WATCHDOG=1") messages (for usage in the --user mode, and when run via nspawn)
|
||
|
||
- **pid1:**
|
||
- When logging about multiple units (stopping BoundTo units, conflicts, etc.),
|
||
log both units as UNIT=, so that journalctl -u triggers on both.
|
||
- generate better errors when people try to set transient properties
|
||
that are not supported...
|
||
https://lists.freedesktop.org/archives/systemd-devel/2015-February/028076.html
|
||
- recreate systemd's D-Bus private socket file on SIGUSR2
|
||
- when we automatically restart a service, ensure we restart its rdeps, too.
|
||
- hide PAM options in fragment parser when compile time disabled
|
||
- Support --test based on current system state
|
||
- If we show an error about a unit (such as not showing up) and it has no Description string, then show a description string generated form the reverse of unit_name_mangle().
|
||
- after deserializing sockets in socket.c we should reapply sockopts and things
|
||
- drop PID 1 reloading, only do reexecing (difficult: Reload()
|
||
currently is properly synchronous, Reexec() is weird, because we
|
||
cannot delay the response properly until we are back, so instead of
|
||
being properly synchronous we just keep open the fd and close it
|
||
when done. That means clients do not get a successful method reply,
|
||
but much rather a disconnect on success.
|
||
- when breaking cycles drop services from /run first, then from /etc, then from /usr
|
||
- when a bus name of a service disappears from the bus make sure to queue further activation requests
|
||
- maybe introduce CoreScheduling=yes/no to optionally set a PR_SCHED_CORE cookie, so that all
|
||
processes in a service's cgroup share the same cookie and are guaranteed not to share SMT cores
|
||
with other units https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/hw-vuln/core-scheduling.rst
|
||
- ExtensionImages= deduplication for services is currently only applied to disk images without GPT envelope.
|
||
This should be extended to work with proper DDIs too, as well as directory confext/sysext. Moreover,
|
||
system-wide confext/sysext should support this too.
|
||
- Pin the mount namespace via FD by sending it back from sd-exec to the manager, and use it
|
||
for live mounting, instead of doing it via PID
|
||
- also remove PID files of a service when the service starts, not just
|
||
when it exits
|
||
- activation by journal search expression
|
||
- lock image configured with RootDirectory=/RootImage= using the usual nspawn semantics while the unit is up
|
||
- find a way how we can reload unit file configuration for
|
||
specific units only, without reloading the whole of systemd
|
||
- figure out why 'systemctl set-property --runtime avahi-daemon.service TimeoutStartSec=150'
|
||
fails with org.freedesktop.DBus.Error.PropertyReadOnly
|
||
- report org.freedesktop.DBus.Error.PropertyReadOnly better than
|
||
"Cannot set property JobTimeoutUSec, or unknown property."
|
||
- allow 'systemctl start --property=…' ?
|
||
|
||
- **PidRef conversion work:**
|
||
- cg_pid_get_xyz()
|
||
- pid_from_same_root_fs()
|
||
- get_ctty_devnr()
|
||
- actually wait for POLLIN on pidref's pidfd in service logic
|
||
- openpt_allocate_in_namespace()
|
||
- unit_attach_pid_to_cgroup_via_bus()
|
||
- cg_attach() – requires new kernel feature
|
||
- journald's process cache
|
||
|
||
- port copy.c over to use LabelOps for all labelling.
|
||
|
||
- portable services: attach not only unit files to host, but also simple
|
||
binaries to a tmpfs path in $PATH.
|
||
|
||
- portabled: when extracting unit files and copying to system.attached, if a
|
||
.p7s is available in the image, use it to protect the system.attached copy
|
||
with fs-verity, so that it cannot be tampered with
|
||
|
||
- print a nicer explanation if people use variable/specifier expansion in ExecStart= for the first word
|
||
|
||
- **Process credentials in:**
|
||
- crypttab-generator: allow defining additional crypttab-like volumes via
|
||
credentials (similar: verity-generator, integrity-generator). Use
|
||
fstab-generator logic as inspiration.
|
||
- run-generator: allow defining additional commands to run via a credential
|
||
- resolved: allow defining additional /etc/hosts entries via a credential (it
|
||
might make sense to then synthesize a new combined /etc/hosts file in /run
|
||
and bind mount it on /etc/hosts for other clients that want to read it.
|
||
- repart: allow defining additional partitions via credential
|
||
- timesyncd: pick NTP server info from credential
|
||
- portabled: read a credential "portable.extra" or so, that takes a list of
|
||
file system paths to enable on start.
|
||
- make systemd-fstab-generator look for a system credential encoding root= or
|
||
usr=
|
||
- in gpt-auto-generator: check partition uuids against such uuids supplied via
|
||
sd-stub credentials. That way, we can support parallel OS installations with
|
||
pre-built kernels.
|
||
|
||
- properly handle loop back mounts via fstab, especially regards to fsck/passno
|
||
|
||
- properly serialize the ExecStatus data from all ExecCommand objects
|
||
associated with services, sockets, mounts and swaps. Currently, the data is
|
||
flushed out on reload, which is quite a limitation.
|
||
|
||
- ProtectClock= (drops CAP_SYS_TIMES, adds seccomp filters for settimeofday, adjtimex), sets DeviceAllow o /dev/rtc
|
||
|
||
- ProtectKeyRing= to take keyring calls away
|
||
|
||
- ProtectMount= (drop mount/umount/pivot_root from seccomp, disallow fuse via DeviceAllow, imply Mountflags=slave)
|
||
|
||
- ProtectReboot= that masks reboot() and kexec_load() syscalls, prohibits kill
|
||
on PID 1 with the relevant signals, and makes relevant files in /sys and
|
||
/proc (such as the sysrq stuff) unavailable
|
||
|
||
- ProtectTracing= (drops CAP_SYS_PTRACE, blocks ptrace syscall, makes /sys/kernel/tracing go away)
|
||
|
||
- ptyfwd: use osc context information in vmspawn/nspawn/… to optionally only
|
||
listen to ^]]] key when no further vmspawn/nspawn context is allocated
|
||
|
||
- ptyfwd: use osc context information to propagate status messages from
|
||
vmspawn/nspawn to service manager's "status" string, reporting what is
|
||
currently in the fg
|
||
|
||
- pull-oci: progress notification
|
||
|
||
- redefine /var/lib/extensions/ as the dir one can place all three of sysext,
|
||
confext as well is multi-modal DDIs that qualify as both. Then introduce
|
||
/var/lib/sysexts/ which can be used to place only DDIs that shall be used as
|
||
sysext
|
||
|
||
- refcounting in sd-resolve is borked
|
||
|
||
- refuse boot if /usr/lib/os-release is missing or /etc/machine-id cannot be set up
|
||
|
||
- remove any syslog support from log.c — we probably cannot do this before split-off udev is gone for good
|
||
|
||
- remove tomoyo support, it's obsolete and unmaintained apparently
|
||
|
||
- RemoveKeyRing= to remove all keyring entries of the specified user
|
||
|
||
- repart + cryptsetup: support file systems that are encrypted and use verity
|
||
on top. Usecase: confexts that shall be signed by the admin but also be
|
||
confidential. Then, add a new --make-ddi=confext-encrypted for this.
|
||
|
||
- repart/gpt-auto/DDIs: maybe introduce a concept of "extension" partitions,
|
||
that have a new type uuid and can "extend" earlier partitions, to work around
|
||
the fact that systemd-repart can only grow the last partition defined. During
|
||
activation we'd simply set up a dm-linear mapping to merge them again. A
|
||
partition that is to be extended would just set a bit in the partition flags
|
||
field to indicate that there's another extension partition to look for. The
|
||
identifying UUID of the extension partition would be hashed in counter mode
|
||
from the uuid of the original partition it extends. Inspiration for this is
|
||
the "dynamic partitions" concept of new Android. This would be a minimalistic
|
||
concept of a volume manager, with the extents it manages being exposes as GPT
|
||
partitions. I a partition is extended multiple times they should probably
|
||
grow exponentially in size to ensure O(log(n)) time for finding them on
|
||
access.
|
||
|
||
- repart: introduce concept of "ghost" partitions, that we setup in almost all
|
||
ways like other partitions, but do not actually register in the actual gpt
|
||
table, but only tell the kernel about via BLKPG ioctl. These partitions are
|
||
disk backed (hence can be large), but not persistent (as they are invisible
|
||
on next boot). Could be used by live media and similar, to boot up as usual
|
||
but automatically start at zero on each boot. There should also be a way to
|
||
make ghost partitions properly persistent on request.
|
||
|
||
- repart: introduce MigrateFileSystem= or so which is a bit like
|
||
CopyFiles=/CopyBlocks= but operates via btrfs device logic: adds target as
|
||
new device then removes source from btrfs. Usecase: a live medium which uses
|
||
"ghost" partitions as suggested above, which can become persistent on request
|
||
on another device.
|
||
|
||
- replace all \x1b, \x1B, \033 C string escape sequences in our codebase with a
|
||
more readable \e. It's a GNU extension, but a ton more readable than the
|
||
others, and most importantly it doesn't result in confusing errors if you
|
||
suffix the escape sequence with one more decimal digit, because compilers
|
||
think you might actually specify a value outside the 8bit range with that.
|
||
|
||
- replace all uses of fopen_temporary() by fopen_tmpfile_linkable() +
|
||
flink_tmpfile() and then get rid of fopen_temporary(). Benefit: use O_TMPFILE
|
||
pervasively, and avoid rename() wherever we can.
|
||
|
||
- replace bootctl's PE version check to actually use APIs from pe-binary.[ch]
|
||
to find binary version.
|
||
|
||
- replace symlink_label(), mknodat_label(), btrfs_subvol_make_label(),
|
||
mkdir_label() and related calls by flags-based calls that use
|
||
label_ops_pre()/label_ops_post().
|
||
|
||
- report: have something that requests cloud workload identity bearer tokens
|
||
and includes it in the report
|
||
|
||
- Reset TPM2 DA bit on each successful boot
|
||
|
||
- **resolved:**
|
||
- mDNS/DNS-SD
|
||
- service registration
|
||
- service/domain/types browsing
|
||
- avahi compat
|
||
- DNS-SD service registration from socket units
|
||
- resolved should optionally register additional per-interface LLMNR
|
||
names, so that for the container case we can establish the same name
|
||
(maybe "host") for referencing the server, everywhere.
|
||
- allow clients to request DNSSEC for a single lookup even if DNSSEC is off (?)
|
||
- make resolved process DNR DHCP info
|
||
- report ttl in resolution replies if we know it. This data is useful
|
||
for tools such as wireguard which want to periodically re-resolve DNS names,
|
||
and might want to use the TTL has hint for that.
|
||
- take possession of some IPv6 ULA address (let's say
|
||
fd00:5353:5353:5353:5353:5353:5353:5353), and listen on port 53 on it for the
|
||
local stubs, so that we can make the stub available via ipv6 too.
|
||
|
||
- revisit how we pass fs images and initrd to the kernel. take uefi http boot
|
||
ramdisks as inspiration: for any confext/sysext/initrd erofs/DDI image simply
|
||
generate a fake pmem region in the UEFI memory tables, that Linux then turns
|
||
into /dev/pmemX. Then turn of cpio-based initrd logic in linux kernel,
|
||
instead let kernel boot directly into /dev/pmem0. In order to allow our usual
|
||
cpio-based parameterization, teach PID 1 to just uncompress cpio ourselves
|
||
early on, from another pmem device. (Related to this, maybe introduce a new
|
||
PE section .ramdisk that just synthesizes pmem devices from arbitrary
|
||
blobs. Could be particularly useful in add-ons)
|
||
|
||
- rework ExecOutput and ExecInput enums so that EXEC_OUTPUT_NULL loses its
|
||
magic meaning and is no longer upgraded to something else if set explicitly.
|
||
|
||
- rework fopen_temporary() to make use of open_tmpfile_linkable() (problem: the
|
||
kernel doesn't support linkat() that replaces existing files, currently)
|
||
|
||
- rework journalctl -M to be based on a machined method that generates a mount
|
||
fd of the relevant journal dirs in the container with uidmapping applied to
|
||
allow the host to read it, while making everything read-only.
|
||
|
||
- rework loopback support in fstab: when "loop" option is used, then
|
||
instantiate a new systemd-loop@.service for the source path, set the
|
||
lo_file_name field for it to something recognizable derived from the fstab
|
||
line, and then generate a mount unit for it using a udev generated symlink
|
||
based on lo_file_name.
|
||
|
||
- rework recursive read-only remount to use new mount API
|
||
|
||
- rework seccomp/nnp logic that even if User= is used in combination with
|
||
a seccomp option we don't have to set NNP. For that, change uid first while
|
||
keeping CAP_SYS_ADMIN, then apply seccomp, the drop cap.
|
||
|
||
- rewrite bpf-devices in libbpf/C code, rather than home-grown BPF assembly, to
|
||
match bpf-restrict-fs, bpf-restrict-ifaces, bpf-socket-bind
|
||
|
||
- rewrite bpf-firewall in libbpf/C code
|
||
|
||
- rfkill,backlight: we probably should run the load tools inside of the udev rules so that the state is properly initialized by the time other software sees it
|
||
|
||
- rough proposed implementation design for remote attestation infra: add a tool
|
||
that generates a quote of local PCRs and NvPCRs, along with synchronous log
|
||
snapshot. use "audit session" logic for that, so that we get read-outs and
|
||
signature in one step. Then turn this into a JSON object. Use the "TCG TSS 2.0
|
||
JSON Data Types and Policy Language" format to encode the signature. And CEL
|
||
for the measurement log.
|
||
|
||
- run0: maybe enable utmp for run0 sessions, so that they are easily visible.
|
||
|
||
- **sd-boot:**
|
||
- do something useful if we find exactly zero entries (ignoring items
|
||
such as reboot/poweroff/factory reset). Show a help text or so.
|
||
- optionally ask for confirmation before executing certain operations
|
||
(e.g. factory resets, storagetm with world access, and so on)
|
||
- for each installed OS, grey out older entries (i.e. all but the
|
||
newest), to indicate they are obsolete
|
||
- we probably should include all BootXY EFI variable defined boot
|
||
entries in our menu, and then suppress ourselves. Benefit: instant
|
||
compatibility with all other OSes which register things there, in particular
|
||
on other disks. Always boot into them via NextBoot EFI variable, to not
|
||
affect PCR values.
|
||
- should look for information what to boot in SMBIOS, too, so that VM
|
||
managers can tell sd-boot what to boot into and suchlike
|
||
- instead of unconditionally deriving the ESP to search boot loader
|
||
spec entries in from the paths of sd-boot binary, let's optionally allow it
|
||
to be configured on sd-boot cmdline + efi var. Use case: embed sd-boot in the
|
||
UEFI firmware (for example, ovmf supports that via qemu cmdline option), and
|
||
use it to load stuff from the ESP.
|
||
- optionally, show boot menu when previous default boot item has
|
||
non-zero "tries done" count
|
||
|
||
- **sd-bus:**
|
||
- EBADSLT handling
|
||
- GetAllProperties() on a non-existing object does not result in a failure currently
|
||
- port to sd-resolve for connecting to TCP dbus servers
|
||
- see if we can introduce a new sd_bus_get_owner_machine_id() call to retrieve the machine ID of the machine of the bus itself
|
||
- see if we can drop more message validation on the sending side
|
||
- add API to clone sd_bus_message objects
|
||
- longer term: priority inheritance
|
||
- dbus spec updates:
|
||
- NameLost/NameAcquired obsolete
|
||
- path escaping
|
||
- update systemd.special(7) to mention that dbus.socket is only about the compatibility socket now
|
||
- add vtable flag, that may be used to request client creds implicitly
|
||
and asynchronously before dispatching the operation
|
||
- parse addresses given in sd_bus_set_addresses immediately and not
|
||
only when used. Add unit tests.
|
||
|
||
- **sd-device:**
|
||
- add an API for acquiring list of child devices, given a device
|
||
objects (i.e. all child dirents that dirs or symlinks to dirs)
|
||
- maybe pin the sysfs dir with an fd, during the entire runtime of
|
||
an sd_device, then always work based on that.
|
||
- should return the devnum type (i.e. 'b' or 'c') via some API for an
|
||
sd_device object, so that data passed into sd_device_new_from_devnum() can
|
||
also be queried.
|
||
|
||
- **sd-event:**
|
||
- allow multiple signal handlers per signal?
|
||
- document chaining of signal handler for SIGCHLD and child handlers
|
||
- define more intervals where we will shift wakeup intervals around in, 1h, 6h, 24h, ...
|
||
- maybe support iouring as backend, so that we allow hooking read and write
|
||
operations instead of IO ready events into event loops. See considerations
|
||
here:
|
||
http://blog.vmsplice.net/2020/07/rethinking-event-loop-integration-for.html
|
||
- add ability to "chain" event sources. Specifically, add a call
|
||
sd_event_source_chain(x, y), which will automatically enable event source y
|
||
in oneshot mode once x is triggered. Use case: in src/core/mount.c implement
|
||
the /proc/self/mountinfo rescan on SIGCHLD with this: whenever a SIGCHLD is
|
||
seen, trigger the rescan defer event source automatically, and allow it to be
|
||
dispatched *before* the SIGCHLD is handled (based on priorities). Benefit:
|
||
dispatch order is strictly controlled by priorities again. (next step: chain
|
||
event sources to the ratelimit being over)
|
||
- compat wd reuse in inotify code: keep a set of removed watch
|
||
descriptors, and clear this set piecemeal when we see the IN_IGNORED event
|
||
for it, or when read() returns EAGAIN or on IN_Q_OVERFLOW. Then, whenever we
|
||
see an inotify wd event check against this set, and if it is contained ignore
|
||
the event. (to be fully correct this would have to count the occurrences, in
|
||
case the same wd is reused multiple times before we start processing
|
||
IN_IGNORED again)
|
||
- optionally, if per-event source rate limit is hit, downgrade
|
||
priority, but leave enabled, and once ratelimit window is over, upgrade
|
||
priority again. That way we can combat event source starvation without
|
||
stopping processing events from one source entirely.
|
||
- similar to existing inotify support add fanotify support (given
|
||
that apparently new features in this area are only going to be added to the
|
||
latter).
|
||
- add 1st class event source for clock changes
|
||
- add 1st class event source for timezone changes
|
||
- add native support for P_ALL waitid() watching, then move PID 1 to
|
||
it for reaping assigned but unknown children. This needs to some special care
|
||
to operate somewhat sensibly in light of priorities: P_ALL will return
|
||
arbitrary processes, regardless of the priority we want to watch them with,
|
||
hence on each event loop iteration check all processes which we shall watch
|
||
with higher prio explicitly, and then watch the entire rest with P_ALL.
|
||
|
||
- sd-journal puts a limit on parallel journal files to view at once. journald
|
||
should probably honour that same limit (JOURNAL_FILES_MAX) when vacuuming to
|
||
ensure we never generate more files than we can actually view.
|
||
|
||
- sd-lldp: pick up 802.3 maximum frame size/mtu, to be able to detect jumbo
|
||
frame capable networks
|
||
|
||
- **sd-rtnl:**
|
||
- add support for more attribute types
|
||
- inbuilt piping support (essentially degenerate async)? see loopback-setup.c and other places
|
||
|
||
- **sd-stub:**
|
||
- detect if we are running with uefi console output on serial, and if so
|
||
automatically add console= to kernel cmdline matching the same port.
|
||
- add ".bootcfg" section for kernel bootconfig data (as per
|
||
https://docs.kernel.org/admin-guide/bootconfig.html)
|
||
|
||
- sd_notify/vsock: maybe support binding to AF_VSOCK in Type=notify services,
|
||
then passing $NOTIFY_SOCKET and $NOTIFY_GUESTCID with PID1's cid (typically
|
||
fixed to "2", i.e. the official host cid) and the expected guest cid, for the
|
||
two sides of the channel. The latter env var could then be used in an
|
||
appropriate qemu cmdline. That way qemu payloads could talk sd_notify()
|
||
directly to host service manager.
|
||
|
||
- **seccomp:**
|
||
- maybe use seccomp_merge() to merge our filters per-arch if we can.
|
||
Apparently kernel performance is much better with fewer larger seccomp
|
||
filters than with more smaller seccomp filters.
|
||
- by default mask x32 ABI system wide on x86-64. it's on its way out
|
||
- don't install filters for ABIs that are masked anyway for the
|
||
specific service
|
||
|
||
- seems that when we follow symlinks to units we prefer the symlink
|
||
destination path over /etc and /usr. We should not do that. Instead
|
||
/etc should always override /run+/usr and also any symlink
|
||
destination.
|
||
|
||
- .service with invalid Sockets= starts successfully.
|
||
|
||
- services: add support for cryptographically unlocking per-service directories
|
||
via TPM2. Specifically, for StateDirectory= (and related dirs) use fscrypt to
|
||
set up the directory so that it can only be accessed if host and app are in
|
||
order.
|
||
|
||
- shared/wall: Once more programs are taught to prefer sd-login over utmp,
|
||
switch the default wall implementation to wall_logind
|
||
(https://github.com/systemd/systemd/pull/29051#issuecomment-1704917074)
|
||
|
||
- show whether a service has out-of-date configuration in "systemctl status" by
|
||
using mtime data of ConfigurationDirectory=.
|
||
|
||
- shutdown logging: store to EFI var, and store to USB stick?
|
||
|
||
- signed bpf loading: to address need for signature verification for bpf
|
||
programs when they are loaded, and given the bpf folks don't think this is
|
||
realistic in kernel space, maybe add small daemon that facilitates this
|
||
loading on request of clients, validates signatures and then loads the
|
||
programs. This daemon should be the only daemon with privs to do load BPF on
|
||
the system. It might be a good idea to run this daemon already in the initrd,
|
||
and leave it around during the initrd transition, to continue serve requests.
|
||
Should then live in its own fs namespace that inherits from the initrd's
|
||
fs tree, not from the host, to isolate it properly. Should set
|
||
PR_SET_DUMPABLE so that it cannot be ptraced from the host. Should have
|
||
CAP_SYS_BPF as only service around.
|
||
|
||
- SIGRTMIN+18 and memory pressure handling should still be added to: localed,
|
||
oomd, timedated.
|
||
|
||
- socket units: allow creating a udev monitor socket with ListenDevices= or so,
|
||
with matches, then activate app through that passing socket over
|
||
|
||
- special case some calls of chase() to use openat2() internally, so
|
||
that the kernel does what we otherwise do.
|
||
|
||
- Split vconsole-setup in two, of which the second is started via udev (instead
|
||
of the "restart" job it currently fires). That way, boot becomes purely
|
||
positive again, and we can nicely order the two against each other.
|
||
|
||
- start making use of the new --graceful switch to util-linux' umount command
|
||
|
||
- start using STATX_SUBVOL in btrfs_is_subvol(). Also, make use of it
|
||
generically, so that image discovery recognizes bcachefs subvols too.
|
||
|
||
- storagetm: maybe also serve the specified disk via HTTP? we have glue for
|
||
microhttpd anyway already. Idea would also be serve currently booted UKI as
|
||
separate HTTP resource, so that EFI http boot on another system could
|
||
directly boot from our system, with full access to the hdd.
|
||
|
||
- **storagetm:**
|
||
- add USB mass storage device logic, so that all local disks are also exposed
|
||
as mass storage devices on systems that have a USB controller that can
|
||
operate in device mode
|
||
- add NVMe authentication
|
||
|
||
- **sigpwr.target** doesn't do anything useful. Consider hooking it up to
|
||
poweroff.target.
|
||
|
||
- Provide a fallback in **rescue.service** that prints a fixed message
|
||
if sulogin-shell could not be started.
|
||
|
||
- support boot into nvme-over-tcp: add generator that allows specifying nvme
|
||
devices on kernel cmdline + credentials. Also maybe add interactive mode
|
||
(where the user is prompted for nvme info), in order to boot from other
|
||
system's HDD.
|
||
|
||
- support crash reporting operation modes (https://live.gnome.org/GnomeOS/Design/Whiteboards/ProblemReporting)
|
||
|
||
- support projid-based quota in machinectl for containers
|
||
|
||
- Support ReadWritePaths/ReadOnlyPaths/InaccessiblePaths in systemd --user instances
|
||
via the new unprivileged Landlock LSM (https://landlock.io)
|
||
|
||
- support specifying download hash sum in systemd-import-generator expression
|
||
to pin image/tarball.
|
||
|
||
- sync dynamic uids/gids between host+portable service (i.e. if DynamicUser=1 is set for a service, make sure that the
|
||
selected user is resolvable in the service even if it ships its own /etc/passwd)
|
||
|
||
- synchronize console access with BSD locks:
|
||
https://lists.freedesktop.org/archives/systemd-devel/2014-October/024582.html
|
||
|
||
- sysext: before applying a sysext, do a superficial validation run so that
|
||
things are not rearranged to wildy. I.e. protect against accidental fuckups,
|
||
such as masking out /usr/lib/ or so. We should probably refuse if existing
|
||
inodes are replaced by other types of inodes or so.
|
||
|
||
- sysext: measure all activated sysext into a TPM PCR
|
||
|
||
- system BPF LSM policy that enforces that block device backed mounts may only
|
||
be established on top of dm-crypt or dm-verity devices, or an allowlist of
|
||
file systems (which should probably include vfat, for compat with the ESP)
|
||
|
||
- system BPF LSM policy that prohibits creating files owned by "nobody"
|
||
system-wide
|
||
|
||
- system BPF LSM policy that prohibits creating or opening device nodes outside
|
||
of devtmpfs/tmpfs, except if they are the pseudo-devices /dev/null,
|
||
/dev/zero, /dev/urandom and so on.
|
||
|
||
- "systemctl preset-all" should probably order the unit files it
|
||
operates on lexicographically before starting to work, in order to
|
||
ensure deterministic behaviour if two unit files conflict (like DMs
|
||
do, for example)
|
||
|
||
- systemctl, machinectl, loginctl: port "status" commands over to
|
||
format-table.c's vertical output logic.
|
||
|
||
- **systemctl:**
|
||
- add systemctl switch to dump transaction without executing it
|
||
- Add a verbose mode to "systemctl start" and friends that explains what is being done or not done
|
||
- print nice message from systemctl --failed if there are no entries shown, and hook that into ExecStartPre of rescue.service/emergency.service
|
||
- add new command to systemctl: "systemctl system-reexec" which reexecs as many daemons as virtually possible
|
||
- systemctl enable: fail if target to alias into does not exist? maybe show how many units are enabled afterwards?
|
||
- systemctl: "Journal has been rotated since unit was started." message is misleading
|
||
- if some operation fails, show log output?
|
||
|
||
- systemd-analyze inspect-elf should show other notes too, at least build-id.
|
||
|
||
- systemd-analyze netif that explains predictable interface (or networkctl)
|
||
|
||
- systemd-analyze: port "pcrs" verb to talk directly to TPM device, instead of
|
||
using sysfs interface (well, or maybe not, as that would require privileges?)
|
||
|
||
- systemd-boot: maybe add support for collapsing menu entries of the same OS
|
||
into one item that can be opened (like in a "tree view" UI element) or
|
||
collapsed. If only a single OS is installed, disable this mode, but if
|
||
multiple OSes are installed might make sense to default to it, so that user
|
||
is not immediately bombarded with a multitude of Linux kernel versions but
|
||
only one for each OS.
|
||
|
||
- systemd-creds: extend encryption logic to support asymmetric
|
||
encryption/authentication. Idea: add new verb "systemd-creds public-key"
|
||
which generates a priv/pub key pair on the TPM2 and stores the priv key
|
||
locally in /var. It then outputs a certificate for the pub part to stdout.
|
||
This can then be copied/taken elsewhere, and can be used for encrypting creds
|
||
that only the host on its specific hw can decrypt. Then, support a drop-in
|
||
dir with certificates that can be used to authenticate credentials. Flow of
|
||
operations is then this: build image with owner certificate, then after
|
||
boot up issue "systemd-creds public-key" to acquire pubkey of the machine.
|
||
Then, when passing data to the machine, sign with privkey belonging to one of
|
||
the dropped in certs and encrypted with machine pubkey, and pass to machine.
|
||
Machine is then able to authenticate you, and confidentiality is guaranteed.
|
||
|
||
- systemd-dissect: add --cat switch for dumping files such as /etc/os-release
|
||
|
||
- systemd-dissect: show available versions inside of a disk image, i.e. if
|
||
multiple versions are around of the same resource, show which ones. (in other
|
||
words: show partition labels).
|
||
|
||
- systemd-firstboot: optionally install an ssh key for root for offline use.
|
||
|
||
- systemd-gpt-auto-generator: add kernel cmdline option to override block
|
||
device to dissect. also support dissecting a regular file. useccase: include
|
||
encrypted/verity root fs in UKI.
|
||
|
||
- systemd-inhibit: make taking delay locks useful: support sending SIGINT or SIGTERM on PrepareForSleep()
|
||
|
||
- **systemd-measure tool:**
|
||
- pre-calculate PCR 12 (command line) + PCR 13 (sysext) the same way we can precalculate PCR 11
|
||
- add --pcrpkey-auto as an alternative to --pcrpkey=, where it would just use
|
||
the same public key specified with --public-key= (or the one automatically
|
||
derived from --private-key=).
|
||
- allow multiple --initrd=, --efifw=, --dtbauto=, etc., params and pad and
|
||
concatenate the contents in the same way that ukify does, so we end up with
|
||
the expected measurement.
|
||
|
||
- systemd-mount should only consider modern file systems when mounting, similar
|
||
to systemd-dissect
|
||
|
||
- systemd-path: Add "private" runtime/state/cache dir enum, mapping to
|
||
$RUNTIME_DIRECTORY, $STATE_DIRECTORY and such
|
||
|
||
- **systemd-pcrextend:**
|
||
- once we have that start measuring every sysext we apply, every confext,
|
||
every RootImage= we apply, every nspawn and so on. All in separate fake
|
||
PCRs.
|
||
|
||
- **systemd-repart:**
|
||
- implement Integrity=data/meta and Integrity=inline for non-LUKS
|
||
case. Currently, only Integrity=inline combined with Encrypt= is implemented
|
||
and uses libcryptsetup features. Add support for plain dm-integrity setups when
|
||
integrity tags are stored by the device (inline), interleaved with data (data),
|
||
and on a separate device (meta).
|
||
- add --ghost, that creates file systems, updates the kernel's
|
||
partition table but does *not* update partition table on disk. This way, we
|
||
have disk backed file systems that go effectively disappear on reboot. This
|
||
is useful when booting from a "live" usb stick that is writable, as it means
|
||
we do not have to place everything in memory. Moreover, we could then migrate
|
||
the file systems to disk later (using btrfs device replacement), if needed as
|
||
part of an installer logic.
|
||
- make useful to duplicate current OS onto a second disk, so
|
||
that we can sanely copy ESP contents, /usr/ images, and then set up btrfs
|
||
raid for the root fs to extend/mirror the existing install. This would be
|
||
very similar to the concept of live-install-through-btrfs-migration.
|
||
- should probably enable btrfs' "temp_fsid" feature for all file
|
||
systems it creates, as we have no interest in RAID for repart, and it should
|
||
make sure that we can mount them trivially everywhere.
|
||
- add support for formatting dm-crypt + dm-integrity file
|
||
systems.
|
||
- also derive the volume key from the seed value, for the
|
||
aforementioned purpose.
|
||
- in addition to the existing "factory reset" mode (which
|
||
simply empties existing partitions marked for that). add a mode where
|
||
partitions marked for it are entirely removed. Use case: remove secondary OS
|
||
copy, and redundant partitions entirely, and recreate them anew.
|
||
- if the GPT *disk* UUID (i.e. the one global for the entire
|
||
disk) is set to all FFFFF then use this as trigger for factory reset, in
|
||
addition to the existing mechanisms via EFI variables and kernel command
|
||
line. Benefit: works also on non-EFI systems, and can be requested on one
|
||
boot, for the next.
|
||
- read LUKS encryption key from $CREDENTIALS_DIRECTORY
|
||
- support setting up dm-integrity with HMAC
|
||
- maybe remove half-initialized image on failure. It fails
|
||
if the output file exists, so a repeated invocation will usually fail if
|
||
something goes wrong on the way.
|
||
- by default generate minimized partition tables (i.e. tables
|
||
that only cover the space actually used, excluding any free space at the
|
||
end), in order to maximize dd'ability. Requires libfdisk work, see
|
||
https://github.com/karelzak/util-linux/issues/907
|
||
- MBR partition table support. Care needs to be taken regarding
|
||
Type=, so that partition definitions can sanely apply to both the GPT and the
|
||
MBR case. Idea: accept syntax "Type=gpt:home mbr:0x83" for setting the types
|
||
for the two partition types explicitly. And provide an internal mapping so
|
||
that "Type=linux-generic" maps to the right types for both partition tables
|
||
automatically.
|
||
- allow sizing partitions as factor of available RAM, so that
|
||
we can reasonably size swap partitions for hibernation.
|
||
- allow boolean option that ensures that if existing partition
|
||
doesn't exist within the configured size bounds the whole command fails. This
|
||
is useful to implement ESP vs. XBOOTLDR schemes in installers: have one set
|
||
of repart files for the case where ESP is large enough and one where it isn't
|
||
and XBOOTLDR is added in instead. Then apply the former first, and if it
|
||
fails to apply use the latter.
|
||
- add per-partition option to never reuse existing partition
|
||
and always create anew even if matching partition already exists.
|
||
- add per-partition option to fail if partition already exist,
|
||
i.e. is not added new. Similar, add option to fail if partition does not exist yet.
|
||
- allow disabling growing of specific partitions, or making
|
||
them (think ESP: we don't ever want to grow it, since we cannot resize vfat)
|
||
Also add option to disable operation via kernel command line.
|
||
- make it a static checker during early boot for existence and
|
||
absence of other partitions for trusted boot environments
|
||
- add support for SD_GPT_FLAG_GROWFS also on real systems, i.e.
|
||
generate some unit to actually enlarge the fs after growing the partition
|
||
during boot.
|
||
- do not print "Successfully resized …" when no change was done.
|
||
|
||
- systemd-stub: maybe store a "boot counter" in the ESP, and pass it down to
|
||
userspace to allow ordering boots (for example in journalctl). The counter
|
||
would be monotonically increased on every boot.
|
||
|
||
- systemd-sysext: add "exec" command or so that is a bit like "refresh" but
|
||
runs it in a new namespace and then just executes the selected binary within
|
||
it. Could be useful to run one-off binaries inside a sysext as a CLI tool.
|
||
|
||
- systemd-tpm2-setup should support a mode where we refuse booting if the SRK
|
||
changed. (Must be opt-in, to not break systems which are supposed to be
|
||
migratable between PCs)
|
||
|
||
- systemd-tpm2-support: add a some logic that detects if system is in DA
|
||
lockout mode, and queries the user for TPM recovery PIN then.
|
||
|
||
- add a networking provider API, inspired by the StorageProvider. Make networkd
|
||
a provider that exposes interfaces for adding tap, tun, veth via the api,
|
||
base this on .netdev logic somehow.
|
||
|
||
- $SYSTEMD_EXECPID that the service manager sets should
|
||
be augmented with $SYSTEMD_EXECPIDFD (and similar for
|
||
other env vars we might send).
|
||
|
||
- **sysupdate:**
|
||
- add fuzzing to the pattern parser
|
||
- support casync as download mechanism
|
||
- "systemd-sysupdate update --all" support, that iterates through all components
|
||
defined on the host, plus all images installed into /var/lib/machines/,
|
||
/var/lib/portable/ and so on.
|
||
- Allow invocation with a single transfer definition, i.e. with
|
||
--definitions= pointing to a file rather than a dir.
|
||
- add ability to disable implicit decompression of downloaded artifacts,
|
||
i.e. a Compress=no option in the transfer definitions
|
||
- download multiple arbitrary patterns from same source
|
||
- SHA256SUMS format with bearer tokens for each resource to download
|
||
- decrypt SHA256SUMS with key from tpm
|
||
- turn http backend stuff int plugin via varlink
|
||
- for each transfer support looking at multiple sources,
|
||
pick source with newest entry. If multiple sources have the same entry, use
|
||
first configured source. Usecase: "sideload" components from local dirs,
|
||
without disabling remote sources.
|
||
- support "revoked" items, which cause the client to
|
||
downgrade/upgrade
|
||
- introduce per-user version that can update per-user installed dDIs
|
||
- make transport pluggable, so people can plug casync or
|
||
similar behind it, instead of http.
|
||
|
||
- sysusers: allow specifying a path to an inode *and* a literal UID in the UID
|
||
column, so that if the inode exists it is used, and if not the literal UID is
|
||
used. Use this for services such as the imds one, which run under their own
|
||
UID in the initrd, and whose data should survive to the host, properly owned.
|
||
|
||
- teach ConditionKernelCommandLine= globs or regexes (in order to match foobar={no,0,off})
|
||
|
||
- teach nspawn/machined a new bus call/verb that gets you a
|
||
shell in containers that have no sensible pid1, via joining the container,
|
||
and invoking a shell directly. Then provide another new bus call/vern that is
|
||
somewhat automatic: if we detect that pid1 is running and fully booted up we
|
||
provide a proper login shell, otherwise just a joined shell. Then expose that
|
||
as primary way into the container.
|
||
|
||
- teach parse_timestamp() timezones like the calendar spec already knows it
|
||
|
||
- teach systemd-nspawn the boot assessment logic: hook up vpick's try counters
|
||
with success notifications from nspawn payloads. When this is enabled,
|
||
automatically support reverting back to older OS version images if newer ones
|
||
fail to boot.
|
||
|
||
- The bind(AF_UNSPEC) construct (for resetting sockets to their initial state)
|
||
should be blocked in many cases because it punches holes in many sandboxes.
|
||
|
||
- the pub/priv key pair generated on the TPM2 should probably also be one you
|
||
can use to get a remote attestation quote.
|
||
|
||
- The udev blkid built-in should expose a property that reflects
|
||
whether media was sensed in USB CF/SD card readers. This should then
|
||
be used to control SYSTEMD_READY=1/0 so that USB card readers aren't
|
||
picked up by systemd unless they contain a medium. This would mirror
|
||
the behaviour we already have for CD drives.
|
||
|
||
- There's currently no way to cancel fsck (used to be possible via C-c or c on the console)
|
||
|
||
- there's probably something wrong with having user mounts below /sys,
|
||
as we have for debugfs. for example, src/core/mount.c handles mounts
|
||
prefixed with /sys generally special.
|
||
https://lists.freedesktop.org/archives/systemd-devel/2015-June/032962.html
|
||
|
||
- think about requeuing jobs when daemon-reload is issued? use case:
|
||
the initrd issues a reload after fstab from the host is accessible
|
||
and we might want to requeue the mounts local-fs acquired through
|
||
that automatically.
|
||
|
||
- **timer units:**
|
||
- timer units should get the ability to trigger when DST changes
|
||
- Modulate timer frequency based on battery state
|
||
|
||
- timesyncd: add ugly bus calls to set NTP servers per-interface, for usage by NM
|
||
|
||
- timesyncd: when saving/restoring clock try to take boot time into account.
|
||
Specifically, along with the saved clock, store the current boot ID. When
|
||
starting, check if the boot id matches. If so, don't do anything (we are on
|
||
the same boot and clock just kept running anyway). If not, then read
|
||
CLOCK_BOOTTIME (which started at boot), and add it to the saved clock
|
||
timestamp, to compensate for the time we spent booting. If EFI timestamps are
|
||
available, also include that in the calculation. With this we'll then only
|
||
miss the time spent during shutdown after timesync stopped and before the
|
||
system actually reset.
|
||
|
||
- tiny varlink service that takes a fd passed in and serves it via http. Then
|
||
make use of that in networkd, and expose some EFI binary of choice for
|
||
DHCP/HTTP base EFI boot.
|
||
|
||
- **tmpfiles:**
|
||
- creating new directories/subvolumes/fifos/device nodes
|
||
should not follow symlinks. None of the other adjustment or creation
|
||
calls follow symlinks.
|
||
- teach tmpfiles.d q/Q logic something sensible in the context of XFS/ext4
|
||
project quota
|
||
- teach tmpfiles.d m/M to move / atomic move + symlink old -> new
|
||
- add new line type for setting btrfs subvolume attributes (i.e. rw/ro)
|
||
- tmpfiles: add new line type for setting fcaps
|
||
- add new line type for moving files from some source dir to some
|
||
target dir. then use that to move sysexts/confexts and stuff from initrd
|
||
tmpfs to /run/, so that host can pick things up.
|
||
- allow conditionalizing on factory reset boot, or on first boot.
|
||
- when cleaning up directories, take care of btrfs subvolumes too
|
||
(ID 927 gen 217573 top level 256 path var/tmp/.#test-btrfs4e8ef947c1122031
|
||
ID 928 gen 217573 top level 927 path var/tmp/.#test-btrfs4e8ef947c1122031/rec
|
||
ID 929 gen 217574 top level 928 path var/tmp/.#test-btrfs4e8ef947c1122031/rec/sv2
|
||
ID 930 gen 217575 top level 928 path var/tmp/.#test-btrfs4e8ef947c1122031/rec/sv3
|
||
ID 931 gen 217576 top level 930 path var/tmp/.#test-btrfs4e8ef947c1122031/rec/sv3/sub
|
||
ID 932 gen 217577 top level 928 path var/tmp/.#test-btrfs4e8ef947c1122031/rec/dir/sv4
|
||
ID 933 gen 217578 top level 932 path var/tmp/.#test-btrfs4e8ef947c1122031/rec/dir/sv4/dir/sv5)
|
||
|
||
- To mimic the new tpm2-measure-pcr= crypttab option and tpm2-measure-nvpcr=
|
||
veritytab option, add the same to integritytab (measuring the HMAC key if one
|
||
is used)
|
||
|
||
- tpm2-setup: reboot if we detect SRK changed
|
||
|
||
- tpm2: add (optional) support for generating a local signing key from PCR 15
|
||
state. use private key part to sign PCR 7+14 policies. stash signatures for
|
||
expected PCR7+14 policies in EFI var. use public key part in disk encryption.
|
||
generate new sigs whenever db/dbx/mok/mokx gets updated. that way we can
|
||
securely bind against SecureBoot/shim state, without having to renroll
|
||
everything on each update (but we still have to generate one sig on each
|
||
update, but that should be robust/idempotent). needs rollback protection, as
|
||
usual.
|
||
|
||
- TPM2: auto-reenroll in cryptsetup, as fallback for hosed firmware upgrades
|
||
and such
|
||
|
||
- track the per-service PAM process properly (i.e. as an additional control
|
||
process), so that it may be queried on the bus and everything.
|
||
|
||
- transient units: don't bother with actually setting unit properties, we
|
||
reload the unit file anyway
|
||
|
||
- **transient units:**
|
||
- add field to transient units that indicate whether systemd or somebody else saves/restores its settings, for integration with libvirt
|
||
|
||
- Turn systemd-networkd-wait-online into a small varlink service that people
|
||
can talk to and specify exactly what to wait for via a method call, and get a
|
||
response back once that level of "online" is reached.
|
||
|
||
- tweak journald context caching. In addition to caching per-process attributes
|
||
keyed by PID, cache per-cgroup attributes (i.e. the various xattrs we read)
|
||
keyed by cgroup path, and guarded by ctime changes. This should provide us
|
||
with a nice speed-up on services that have many processes running in the same
|
||
cgroup.
|
||
|
||
- tweak sd-event's child watching: keep a prioq of children to watch and use
|
||
waitid() only on the children with the highest priority until one is waitable
|
||
and ignore all lower-prio ones from that point on
|
||
|
||
- **udev-link-config:**
|
||
- Make sure ID_PATH is always exported and complete for
|
||
network devices where possible, so we can safely rely
|
||
on Path= matching
|
||
|
||
- **udev:**
|
||
- move to LGPL
|
||
- kill scsi_id
|
||
- add trigger --subsystem-match=usb/usb_device device
|
||
- reimport udev db after MOVE events for devices without dev_t
|
||
- re-enable ProtectClock= once only cgroupsv2 is supported.
|
||
See f562abe2963bad241d34e0b308e48cf114672c84.
|
||
|
||
- udevd: extend memory pressure logic: also kill any idle worker processes
|
||
|
||
- unify how blockdev_get_root() and sysupdate find the default root block device
|
||
|
||
- **unify on openssl:**
|
||
- figure out what to do about libmicrohttpd:
|
||
- 1.x is stable and has a hard dependency on gnutls
|
||
- 2.x is in development and has openssl support
|
||
- Worth testing against 2.x in our CI?
|
||
- port fsprg over to openssl
|
||
|
||
- **unit files:**
|
||
- allow port=0 in .socket units
|
||
- maybe introduce ExecRestartPre=
|
||
- implement Register= switch in .socket units to enable registration
|
||
in Avahi, RPC and other socket registration services.
|
||
- allow Type=simple with PIDFile=
|
||
https://bugzilla.redhat.com/show_bug.cgi?id=723942
|
||
- allow writing multiple conditions in unit files on one line
|
||
- add a concept of RemainAfterExit= to scope units
|
||
- Allow multiple ExecStart= for all Type= settings, so that we can cover rescue.service nicely
|
||
- add verification of [Install] section to systemd-analyze verify
|
||
|
||
- **unit install:**
|
||
- "systemctl mask" should find all names by which a unit is accessible
|
||
(i.e. by scanning for symlinks to it) and link them all to /dev/null
|
||
|
||
- update HACKING.md to suggest developing systemd with the ideas from:
|
||
https://0pointer.net/blog/testing-my-system-code-in-usr-without-modifying-usr.html
|
||
https://0pointer.net/blog/running-an-container-off-the-host-usr.html
|
||
|
||
- use name_to_handle_at() with AT_HANDLE_FID instead of .st_ino (inode
|
||
number) for identifying inodes, for example in copy.c when finding hard
|
||
links, or loop-util.c for tracking backing files, and other places.
|
||
|
||
- use sd-event ratelimit feature optionally for journal stream clients that log
|
||
too much
|
||
|
||
- userdb: allow existence checks
|
||
|
||
- userdb: when synthesizing NSS records, pick "best" password from defined
|
||
passwords, not just the first. i.e. if there are multiple defined, prefer
|
||
unlocked over locked and prefer non-empty over empty.
|
||
|
||
- userdbd: implement an additional varlink service socket that provides the
|
||
host user db in restricted form, then allow this to be bind mounted into
|
||
sandboxed environments that want the host database in minimal form. All
|
||
records would be stripped of all meta info, except the basic UID/name
|
||
info. Then use this in portabled environments that do not use PrivateUsers=1.
|
||
|
||
- validatefs: validate more things: check if image id + os id of initrd match
|
||
target mount, so that we refuse early any attempts to boot into different
|
||
images with the wrong kernels. check min/max kernel version too. all encoded
|
||
via xattrs in the target fs.
|
||
|
||
- Varlinkification of the following command line tools, to open them up to
|
||
other programs via IPC:
|
||
- coredumpctl
|
||
- systemd-bless-boot
|
||
- systemd-measure
|
||
- systemd-dissect
|
||
- systemd-sysupdate
|
||
- systemd-analyze
|
||
- kernel-install
|
||
- systemd-mount (with PK so that desktop environments could use it to mount disks)
|
||
|
||
- verify that the AF_UNIX sockets of a service in the fs still exist
|
||
when we start a service in order to avoid confusion when a user
|
||
assumes starting a service is enough to make it accessible
|
||
|
||
- vmspawn switch default swtpm PCR bank to SHA384-only (away from SHA256), at
|
||
least on 64bit archs, simply because SHA384 is typically double the hashing
|
||
speed than SHA256 on 64bit archs (since based on 64bit words unlike SHA256
|
||
which uses 32bit words).
|
||
|
||
- **vmspawn:**
|
||
- --ephemeral support
|
||
- --read-only support
|
||
- automatically suspend/resume the VM if the host suspends. Use logind
|
||
suspend inhibitor to implement this. request clean suspend by generating
|
||
suspend key presses.
|
||
- support for "real" networking via "-n" and --network-bridge=
|
||
- translate SIGTERM to clean ACPI shutdown event
|
||
- implement hotkeys ^]^]r and ^]^]p like nspawn
|
||
|
||
- **vmspawn disk hotplug:**
|
||
- virtio-blk-pci — the simplest path. Each disk is an independent PCI
|
||
device. QMP sequence (two steps):
|
||
|
||
blockdev-add {driver: "raw", node-name: "disk1",
|
||
file: {driver: "file", filename: "/path/to/img"}}
|
||
device_add {driver: "virtio-blk-pci", id: "disk1", drive: "disk1"}
|
||
|
||
Removal (three steps):
|
||
|
||
device_del {id: "disk1"}
|
||
... wait for DEVICE_DELETED event (guest acknowledges unplug) ...
|
||
blockdev-del {node-name: "disk1"}
|
||
|
||
Works on both i440fx (legacy PCI) and q35 (PCIe) machine types. PCI
|
||
address auto-assigned by QEMU — no topology pre-configuration needed.
|
||
Each disk independently hotpluggable. Guest sees a virtio block
|
||
device (/dev/vdX). Well-tested path — used by libvirt, Incus, and all
|
||
major VM managers. No special boot-time setup required.
|
||
|
||
- NVMe — two-level model: controller + namespace(s). The controller is
|
||
a PCIe device; namespaces live on an internal NVMe bus attached to
|
||
the controller. Key limitation: namespaces are NOT hotpluggable —
|
||
TYPE_NVME_BUS has no HotplugHandler, so device_add of nvme-ns at
|
||
runtime fails with "Bus does not support hotplugging". The only
|
||
option is hotplugging the entire controller, which embeds one
|
||
namespace via its "drive" property:
|
||
|
||
blockdev-add {driver: "raw", node-name: "disk1",
|
||
file: {driver: "file", filename: "/path/to/img"}}
|
||
device_add {driver: "nvme", id: "disk1", drive: "disk1", serial: "disk1"}
|
||
|
||
Same two-step pattern as virtio-blk, with these limitations:
|
||
|
||
1. PCIe-only (implements INTERFACE_PCIE_DEVICE). Does not work on
|
||
i440fx. Requires q35 or virt (aarch64).
|
||
2. Requires pre-configured PCIe root ports that exist at boot.
|
||
Without them, device_add fails with "no slot/function available".
|
||
vmspawn would need to create empty root ports at QEMU startup to
|
||
reserve hotplug slots.
|
||
3. No namespace-level granularity. Each hotplugged disk burns a full
|
||
PCIe slot (controller + one namespace). Cannot add multiple
|
||
namespaces to a single controller at runtime.
|
||
4. Serial property required (up to 20 chars). virtio-blk does not
|
||
require it.
|
||
|
||
- virtio-scsi — shared virtio-scsi-pci controller with individual
|
||
scsi-hd devices attached. Incus uses this as its default bus. The
|
||
controller must exist at boot, but individual disks (LUNs) can be
|
||
hotplugged onto it without burning PCI slots. Scales better than
|
||
virtio-blk when many disks are needed, but adds complexity
|
||
(controller management, LUN assignment).
|
||
|
||
- **vmspawn AcquireQMP():** implement as id-rewriting proxy with FD
|
||
passing. vmspawn acts as a QMP multiplexer. When a client calls
|
||
AcquireQMP():
|
||
|
||
1. Create socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0).
|
||
2. Return one end to the client via sd_varlink_push_fd() +
|
||
sd_varlink_reply().
|
||
3. Add an sd-event I/O source on vmspawn's end for the client socket.
|
||
4. Send a synthetic QMP greeting on the client socket, handle
|
||
qmp_capabilities locally. Maybe we don't even need that and just
|
||
document that it's a fully initialized connection.
|
||
5. For client commands: read from the client socket, rewrite id to
|
||
vmspawn's internal counter (store mapping internal_id ->
|
||
(client_fd, original_id_json_variant)), forward to QEMU.
|
||
6. For QEMU responses: match internal id, look up original client id,
|
||
rewrite back, send to the correct client socket.
|
||
7. Broadcast QMP events (no id) to all AcquireQMP clients AND to
|
||
SubscribeEvents subscribers.
|
||
8. On client EOF: remove the I/O source, clean up id mappings.
|
||
|
||
This keeps vmspawn in full control of the QMP connection — VMControl
|
||
handlers and multiple AcquireQMP clients can coexist without id
|
||
collisions. The server needs SD_VARLINK_SERVER_ALLOW_FD_PASSING_OUTPUT
|
||
(already set in machined's pattern).
|
||
|
||
AcquireQMP() also requires server-side Varlink protocol upgrades.
|
||
mvo's WIP branch:
|
||
<https://github.com/systemd/systemd/compare/main...mvo5:varlink-protocol-upgrade-server-side?expand=1>
|
||
|
||
- we probably needs .pcrpkeyrd or so as additional PE section in UKIs,
|
||
which contains a separate public key for PCR values that only apply in the
|
||
initrd, i.e. in the boot phase "enter-initrd". Then, consumers in userspace
|
||
can easily bind resources to just the initrd. Similar, maybe one more for
|
||
"enter-initrd:leave-initrd" for resources that shall be accessible only
|
||
before unprivileged user code is allowed. (we only need this for .pcrpkey,
|
||
not for .pcrsig, since the latter is a list of signatures anyway). With that,
|
||
when you enroll a LUKS volume or similar, pick either the .pcrkey (for
|
||
coverage through all phases of the boot, but excluding shutdown), the
|
||
.pcrpkeyrd (for coverage in the initrd only) and .pcrpkeybt (for coverage
|
||
until users are allowed to log in).
|
||
|
||
- we probably should have some infrastructure to acquire sysexts with
|
||
drivers/firmware for local hardware automatically. Idea: reuse the modalias
|
||
logic of the kernel for this: make the main OS image install a hwdb file
|
||
that matches against local modalias strings, and adds properties to relevant
|
||
devices listing names of sysexts needed to support the hw. Then provide some
|
||
tool that goes through all devices and tries to acquire/download the
|
||
specified images.
|
||
|
||
- We should probably replace /etc/rc.d/README with a symlink to doc
|
||
content. After all it is constant vendor data.
|
||
|
||
- We should start measuring all services, containers, and system extensions we
|
||
activate. probably into PCR 13. i.e. add --tpm2-measure-pcr= or so to
|
||
systemd-nspawn, and MeasurePCR= to unit files. Should contain a measurement
|
||
of the activated configuration and the image that is being activated (in case
|
||
verity is used, hash of the root hash).
|
||
|
||
- what to do about udev db binary stability for apps? (raw access is not an option)
|
||
|
||
- when importing an fs tree with machined, complain if image is not an OS
|
||
|
||
- when importing an fs tree with machined, optionally apply userns-rec-chown
|
||
|
||
- when isolating, try to figure out a way how we implicitly can order
|
||
all units we stop before the isolating unit...
|
||
|
||
- when killing due to service watchdog timeout maybe detect whether target
|
||
process is under ptracing and then log loudly and continue instead.
|
||
|
||
- when mounting disk images: if IMAGE_ID/IMAGE_VERSION is set in os-release
|
||
data in the image, make sure the image filename actually matches this, so
|
||
that images cannot be misused.
|
||
|
||
- when switching root from initrd to host, set the machine_id env var so that
|
||
if the host has no machine ID set yet we continue to use the random one the
|
||
initrd had set.
|
||
|
||
- when systemd-sysext learns mutable /usr/ (and systemd-confext mutable /etc/)
|
||
then allow them to store the result in a .v/ versioned subdir, for some basic
|
||
snapshot logic
|
||
|
||
- when we detect that there are waiting jobs but no running jobs, do something
|
||
|
||
- whenever we receive fds via SCM_RIGHTS make sure none got dropped due to the
|
||
reception limit the kernel silently enforces.
|
||
|
||
- after option+verb introspection is added, add a test to verify that the
|
||
list in proc-cmdline.c matches the actual option list in systemd and shutdown.
|
||
|
||
- write a document explaining how to write correct udev rules. Mention things
|
||
such as:
|
||
1. do not do lists of vid/pid matches, use hwdb for that
|
||
2. add|change action matches are typically wrong, should be != remove
|
||
3. use GOTO, make rules short
|
||
4. people shouldn't try to make rules file non-world-readable
|