forked from systemd/systemd
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathTODO
1365 lines (1024 loc) · 64.6 KB
/
TODO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
Bugfixes:
* Many manager configuration settings that are only applicable to user
manager or system manager can be always set. It would be better to reject
them when parsing config.
* userdbctl: "Password OK: yes" is shown even when there are no passwords
or the password is locked.
External:
* Fedora: add an rpmlint check that verifies that all unit files in the RPM are listed in %systemd_post macros.
Janitorial Clean-ups:
* Rearrange tests so that the various test-xyz.c match a specific src/basic/xyz.c again
* rework mount.c and swap.c to follow proper state enumeration/deserialization
semantics, like we do for device.c now
Features:
* homed: try to unmount in regular intervals when home dir was busy when we
tried because idle.
* sd-bus: when connecting to some dbus server socker, set originating AF_UNIX
socket name in abstract namespace to include "description" string, and pick
it up from there in sd_bus_creds logic. i.e. we can use the socket peer
address as conduit for some minimal connection metainfo, and use it to
restore the "description" logic that kdbus used to have.
* teach LoadCredential= the ability to load all files from a specified dir as
individual creds
* systemd-analyze netif that explains predictable interface (or networkctl)
* port selinux code from mallinfo() to mallinfo2() once added to glibc
* Add service setting to run a service within the specified VRF. i.e. do the
equivalent of "ip vrf exec".
* export action of device object on sd-device, so that monitor becomes useful
* add root=tmpfs that mounts a tmpfs to /sysroot (to be used in combination
with usr=…, for a similar effect as systemd.volatile=yes but without the
"hide-out" effect). Also, add root=gpt-auto-late support or so, that is like
root=gpt-auto but initially mounts a tmpfs to /sysroot, and then revisits
later after systemd-repart ran. Usecase: let's ship images with only /usr
partition, then on first boot create the root partition. In this case we want
to read the repart data from /usr before the root partition exists. Add
usr=gpt-auto that automatically finds a /usr partition.
* change SwitchRoot() implementation in PID 1 to use pivot_root(".", "."), as
documented in the pivot_root(2) man page, so that we can drop the /oldroot
temporary dir.
* special case some calls of chase_symlinks() to use openat2() internally, so
that the kernel does what we otherwise do.
* homed: keep an fd to the homedir open at all times, to keep the fs pinned
(autofs and such) while user is logged in.
* nss-systemd: also synthesize shadow records for users/groups
* make use of new glibc 2.32 APIs sigabbrev_np() and strerrorname_np().
* cryptsetup: if keyfile specified in crypttab is AF_UNIX socket, connect to it
and read from it (like we do elsewhere with READ_FULL_FILE_CONNECT_SOCKET)
* when main nspawn supervisor process gets suspended due to SIGSTOP/SIGTTOU or
so, freeze the payload too.
* repart: support setting up dm-integrity with HMAC
* add /etc/integritytab, to support dm-integrity setups. In particular those
with HMAC as hash function, so that we can have a protected /home without
encryption (leaving encryption to the individual dirs/homed).
* complement root=, rootflags=, rootfstype= with rootsubdir= which allows
mounting a subdir of the root fs as actual root. This can be used as
fstype-agnostic version of btrfs' rootflags=subvol=foobar.
* if /usr/bin/swapoff fails due to OOM, log a friendly explanatory message about it
* build short web pages out of each catalog entry, build them along with man
pages, and include hyperlinks to them in the journal output
* machined: add API to acquire UID range. add API to mount/dissect loopback
file. Both protected by PK. Then make nspawn use these APIs to run
unprivileged containers. i.e. push the truly privileged bits into machined,
so that the client side can remain entirely unprivileged, with SUID or
anything like that.
* journald: 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.
* add "throttling" to sd-event event sources: optionally, when we wake up too
often for one, let's turn it off entirely for a while. Use that for the
/proc/self/mountinfo logic.
* nspawn: support time namespaces
* systemd-firstboot: make sure to always use chase_symlinks() before
reading/writing files
* add ConditionSecurity=tpm2
* Remove any support for booting without /usr pre-mounted in the initrd entirely.
Update INITRD_INTERFACE.md accordingly.
* pid1: Move to tracking of main pid/control pid of units per pidfd
* pid1: support new clone3() fork-into-cgroup feature
* pid1: also remove PID files of a service when the service starts, not just
when it exits
* make us use dynamically fewer deps for containers in general purpose distros:
o turn into dlopen() deps:
- elfutils (always)
- p11-kit-trust (always)
- kmod-libs (only when called from PID 1)
- libblkid (only in RootImage= handling in PID 1, but not elsewhere)
- libpam (only when called from PID 1)
- bzip2, xz, lz4 (always — gzip and zstd should probably stay static deps the way they are,
since they are so basic and our defaults)
o move into separate libsystemd-shared-iptables.so .so
- iptables-libs (only used by nspawn + networkd)
* seccomp: when SystemCallArchitectures=native is set then don't install any
other seccomp filters for any of the other archs, in order to reduce the
number of seccomp filters we install needlessly.
* 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.
* systemd-path: add ESP and XBOOTLDR path. Add "private" runtime/state/cache dir enum,
mapping to $RUNTIME_DIRECTORY, $STATE_DIRECTORY and such
* All tools that support --root= should also learn --image= so that they can
operate on disk images directly. Specifically: bootctl, systemctl,
coredumpctl. (Already done: systemd-nspawn, systemd-firstboot,
systemd-repart, systemd-tmpfiles, systemd-sysusers, journalctl)
* seccomp: by default mask x32 ABI system wide on x86-64. it's on its way out
* seccomp: don't install filters for ABIs that are masked anyway for the
specific service
* seccomp: maybe merge all filters we install into one with that libseccomp API that allows merging.
* credentials system:
- maybe add AcquireCredential= for querying a cred via ask-password
- maybe try to acquire creds via keyring?
- maybe try to pass creds via keyring?
- maybe optionally pass creds via memfd
- maybe add support for decrypting creds via TPM
- maybe add support for decrypting/importing creds via pkcs11
- make systemd-cryptsetup acquire pw via creds logic
- make PAMName= acquire pw via creds logic
- make macsec/wireguard code in networkd read key via creds logic
- make gatwayd/remote read key via creds logic
- add sd_notify() command for flushing out creds not needed anymore
* homed: during login resize fs automatically towards size goal. Specifically,
resize to diskSize if possible, but leave a certain amount (configured by a
new value diskLeaveFreeSize) of space free on the backing fs.
* homed: 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
* homed: add a way to "adopt" a home directory, i.e. strip foreign signatures
and insert a local signature instead.
* homed: 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.
* homed: support new FS_IOC_ADD_ENCRYPTION_KEY ioctl for setting up fscrypt
* homed: maybe pre-create ~/.cache as subvol so that it can have separate quota
easily?
* busctl: maybe expose a verb "ping" for pinging a dbus service to see if it
exists and responds.
* when systemd-nspawn and suchlike dissect an OS image, and there are multiple
root partitions, do an strverscmp() on the partition label and boot
first. That is inspired how sd-boot figures out which kernel to boot, and
thus allows defining OS images which can be A/B updated and we default to the
newest version automatically, both in nspawn and in sd-boot
* cryptsetup: support FIDO2 tokens for deriving keys (i.e. do what homed can do
also in plain cryptsetup)
* systemd-gpt-auto should probably set x-systemd.growfs on the mounts it
creates
* bootctl:
- 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
- make it operate on loopback files, dissecting enough to find ESP to operate on
* Maybe add a separate GPT partition type to the discoverable partition spec
for "hibernate" partitions, that are exactly like swap partitions but only
activated right before hibernation and thus never used for regular swapping.
* by default, in systemd --user service bump the OOMAdjust to 100, as privs
allow so that systemd survives
* cryptsetup: allow encoding key directly in /etc/crypttab, maybe with a
"base64:" prefix. Useful in particular for pkcs11 mode.
* cryptsetup: reimplement the mkswap/mke2fs in cryptsetup-generator to use
systemd-makefs.service instead.
* socket units: allow creating a udev monitor socket with ListenDevices= or so,
with matches, then activate app through that passing socket over
* unify on openssl (as soon as OpenSSL 3.0 is out, and the Debian license
confusion is gone)
- port sd_id128_get_machine_app_specific() over from khash
- port resolved over from libgcrypt (DNSSEC code)
- port journald + fsprg over from libgcrypt
- port importd over from libgcrypt
- when that's done: kill khash.c
- when that's done: kill gnutls support in resolved
* when we resize disks (homed?) always round up to 4K sectors, not 512K
* add growvol and makevol options for /etc/crypttab, similar to
x-systemd.growfs and x-systemd-makefs.
* hook up the TPM to /etc/crypttab, with a new option that is similar to the
new PKCS#11 option in crypttab, and allows unlocking a LUKS volume via a key
unsealed from the TPM. Optionally, if TPM is not available fall back to
TPM-less mode, and set up linear DM mapping instead (inspired by kpartx), so
that the device paths stay the same, regardless if crypto is used or not.
* systemd-repart: 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
* systemd-repart: 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.
* systemd-repart: allow sizing partitions as factor of available RAM, so that
we can reasonably size swap partitions for hibernation.
* systemd-repart: allow managing the gpt read-only partition flag + auto-mount flag
* systemd-repart: 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.
* systemd-repart: add per-partition option to never reuse existing partition
and always create anew even if matching partition already exists.
* systemd-repart: 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.
* systemd-repart: allow disabling growing of specific partitions, or making
them (think ESP: we don't ever want to grow it, since we cannot resize vfat)
* systemd-repart: make it a static checker during early boot for existence and
absence of other partitions for trusted boot environments
* userdb: allow username prefix searches in varlink API, allow realname and
realname substr searches in varlink API
* userdb: allow uid/gid range checks
* userdb: allow existence checks
* pid1: activation by journal search expression
* 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.
* sd-event: add native support for P_ALL waitid() watching, then move PID 1 to
it fo 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.
* 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
* 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.
* figure out automatic partition discovery when combining writable root dir
with immutable /usr
* 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
* teach parse_timestamp() timezones like the calendar spec already knows it
* beef up hibernation to optionally do swapon/swapoff immediately before/after
the hibernation
* beef up s2h to implement a battery watch loop: instead of entering
hibernation unconditionally after coming back from resume make a decision
based on the battery load level: if battery level is above a specific
threshold, go to suspend again, only hibernate if below it. This means we'd
stick to suspend usually, but fall back to hibernation only when battery runs
empty (well, subject to our sampling interval). Related to this, check if we
can make ACPI _BTP (i.e. /sys/class/power_supply/*/alarm) work for us too,
i.e. see if it can wake up machines from suspend, so that we could resume
automatically when the system is low on power and move automatically to
hibernation mode. (see
https://uefi.org/sites/default/files/resources/ACPI%206_2_A_Sept29.pdf
section 10.2.2.8 and
https://docs.microsoft.com/en-us/windows-hardware/design/device-experiences/modern-standby-wake-sources
at the end).
* add an explicit "vertical" mode to format-table, so that "systemctl
status"-like outputs (i.e. with a series of field names left and values
right) become genuine first class citizens, and we gain automatic, sane JSON
output for them.
* We should probably replace /var/log/README, /etc/rc.d/README with symlinks
that are linked to these places instead of copied. After all they are
constant vendor data.
* maybe add kernel cmdline params: to force random seed crediting
* nspawn: on cgroupsv1 issue cgroup empty handler process based on host events,
so that we make cgroup agent logic safe
* nspawn/machined: add API to invoke binary in container, then use that as
fallback in "machinectl shell"
* logind: rework pam_logind to also do a bus call in case of invocation from
user@.service, which returns the XDG_RUNTIME_DIR value, and make this
behaviour selectable via pam module option.
* 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)
- resize on login?
- shrink fs on logout?
- 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?, preferred session type?, 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)
- in systemd's PAMName= logic: query passwords with ssh-askpassword, so that we can make "loginctl set-linger" mode work
- fingerprint authentication, pattern authentication, …
- make sure "classic" user records can also be managed by homed
- make size of $XDG_RUNTIME_DIR configurable in user record
- query password from kernel keyring first
- update even if record is "absent"
- add a "access mode" + "fstype" field to the "status" section of json identity records reflecting the actually used access mode and fstype, even on non-luks backends
- move acct mgmt stuff from pam_systemd_home to pam_systemd?
- when "homectl --pkcs11-token-uri=" is used, synthesize ssh-authorized-keys records for all keys we have private keys on the stick for
- make slice for users configurable (requires logind rework)
- logind: populate auto-login list bus property from PKCS#11 token
- when determining state of a LUKS home directory, check DM suspended sysfs file
- introduce API for "making room", that grows/shrinks home directory
according to elastic parameters, discards blocks, and removes additional snapshots. Call it
either from UI when disk space gets low
* introduce a new per-process uuid, similar to the boot id, the machine id, the
invocation id, that is derived from process creds, specifically a hashed
combination of AT_RANDOM + getpid() + the starttime from
/proc/self/status. Then add these ids implicitly when logging. Deriving this
uuid from these three things has the benefit that it can be derived easily
from /proc/$PID/ in a stable, and unique way that changes on both fork() and
exec().
* let's not GC a unit while its ratelimits are still pending
* when killing due to service watchdog timeout maybe detect whether target
process is under ptracing and then log loudly and continue instead.
* introduce a new group to own TPM devices
* make rfkill uaccess controllable by default, i.e. steal rule from
gnome-bluetooth and friends
* 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.
* 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.
* maybe trigger a uevent "change" on a device if "systemctl reload xyz.device"
is issued.
* when importing an fs tree with machined, optionally apply userns-rec-chown
* when importing an fs tree with machined, complain if image is not an OS
* 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.
* 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 whil
keeping CAP_SYS_ADMIN, then apply seccomp, the drop cap.
* add a concept for automatically loading per-unit secrets off disk and
inserting them into the kernel keyring. Maybe SecretsDirectory= similar to
ConfigurationDirectory=.
* when no locale is configured, default to UEFI's PlatformLang variable
* bootctl,sd-boot: actually honour the "architecture" key
* add a new syscall group "@esoteric" for more esoteric stuff such as bpf() and
usefaultd() and make systemd-analyze check for it.
* 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.
* Move RestrictAddressFamily= to the new cgroup create socket
* support the bind/connect/sendmsg cgroup stuff for sandboxing, and possibly
patching around
* maybe implicitly attach monotonic+realtime timestamps to outgoing messages in
log.c and sd-journal-send
* optionally: turn on cgroup delegation for per-session scope units
* introduce per-unit (i.e. per-slice, per-service) journal log size limits.
* sd-boot: automatically load EFI modules from some drop-in dir, so that people
can add in file system drivers and such
* sd-boot: optionally, show boot menu when previous default boot item has
non-zero "tries done" count
* 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.
* 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 abberviated 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.
* maybe extend .path units to expose fanotify() per-mount change events
* Add a "systemctl list-units --by-slice" mode or so, which rearranges the
output of "systemctl list-units" slightly by showing the tree structure of
the slices, and the units attached to them.
* the a-posteriori stopping of units bound to units that disappeared logic
should be reworked: there should be a queue of units, and we should only
enqueue stop jobs from a defer event that processes queue instead of
right-away when we find a unit that is bound to one that doesn't exist
anymore. (similar to how the stop-unneeded queue has been reworked the same
way)
* nspawn: make nspawn suitable for shell pipelines: instead of triggering a
hangup when input is finished, send ^D, which synthesizes an EOF. Then wait
for hangup or ^D before passing on the EOF.
* When reloading configuration PID 1 should reset all its properties to the
original defaults before calling parse_config()
* nspawn: greater control over selinux label?
* hibernate/s2h: make this robust and safe to enable in Fedora by default.
Specifically:
1. add resume_offset support to the resume code (i.e. support swap files
properly)
2. check if swap is on weird storage and refuse if so
3. add auto-detection of hibernation images
* cgroups: use inotify to get notified when somebody else modifies cgroups
owned by us, then log a friendly warning.
* 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.
* add support for "portablectl attach http://foobar.com/waaa.raw (i.e. importd integration)
* add attach --enable and attach --now (for attach+enable+start)
* sync dynamic uids/gids between host+portable srvice (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)
* Fix DECIMAL_STR_MAX or DECIMAL_STR_WIDTH. One includes a trailing NUL, the
other doesn't. What a disaster. Probably to exclude it. Also
DECIMAL_STR_WIDTH should probably add an extra "-" into account for negative
numbers.
* 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.
* port systemctl, busctl, … over to format-table.[ch]'s table formatters
* pid1: lock image configured with RootDirectory=/RootImage= using the usual nspawn semantics while the unit is up
* add --vacuum-xyz options to coredumpctl, matching those journalctl already has.
* introduce Ephemeral= unit file switch, that creates an ephemeral copy of all
files and directories that are left writable for a unit, and which are
removed after the unit goes down again. A bit like --ephemeral for
systemd-nspawn but for system services. If used together with RootImage= this
should reflink the image file itself.
Related: add Ephemeral=<path1> <path2> … which would allow marking
specific paths only like this.
* 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.
* show invocation ID in systemd-run output
* bypass SIGTERM state in unit files if KillSignal is SIGKILL
* 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.
* teach tmpfiles.d q/Q logic something sensible in the context of XFS/ext4
project quota
* 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. Usecase: 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
* maybe rework get_user_creds() to query the user database if $SHELL is used
for root, but only then.
* be stricter with fds we receive for the fdstore: close them asynchronously
* calenderspec: add support for week numbers and day numbers within a
year. This would allow us to define "bi-weekly" triggers safely.
* sd-bus: add vtable flag, that may be used to request client creds implicitly
and asynchronously before dispatching the operation
* sd-bus: parse addresses given in sd_bus_set_addresses immediately and not
only when used. Add unit tests.
* make use of ethtool veth peer info in machined, for automatically finding out
host-side interface pointing to the container.
* 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.
* taint systemd if there are fewer than 65536 users assigned (userns) to the system.
* deprecate RootDirectoryStartOnly= in favour of a new ExecStart= prefix char
* add a new RuntimeDirectoryPreserve= mode that defines a similar lifecycle for
the runtime dir as we maintain for the fdstore: i.e. keep it around as long
as the unit is running or has a job queued.
* support projid-based quota in machinectl for containers
* 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
* blog about fd store and restartable services
* document Environment=SYSTEMD_LOG_LEVEL=debug drop-in in debugging document
* 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.
* 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.
* 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.
* beef up pam_systemd to take unit file settings such as cgroups properties as
parameters
* maybe hook of xfs/ext4 quotactl() with services? i.e. automatically manage
the quota of a the user indicated in User= via unit file settings, like the
other resource management concepts. Would mix nicely with DynamicUser=1. Or
alternatively, do this with projids, so that we can also cover services
running as root. Quota should probably cover all the special dirs such as
StateDirectory=, LogsDirectory=, CacheDirectory=, as well as RootDirectory= if it
is set, plus the whole disk space any image configured with RootImage=.
* In DynamicUser= mode: before selecting a UID, use disk quota APIs on relevant
disks to see if the UID is already in use.
* add "systemctl wait" or so, which does what "systemd-run --wait" does, but
for all units. It should be both a way to pin units into memory as well as a
wait to retrieve their exit data.
* expose IO accounting data on the bus, show it in systemd-run --wait and log
about it in the resource log message
* show whether a service has out-of-date configuration in "systemctl status" by
using mtime data of ConfigurationDirectory=.
* 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 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
* 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.
* hostnamed: populate form factor data from a new hwdb database, so that old
yogas can be recognized as "convertible" too, even if they predate the DMI
"convertible" form factor
* 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.
* 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.
* 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.
* gpt-auto logic: related to the above, maybe support a "secondary" root
partition, that is mounted to / and is writable, and where the actual root's
/usr is mounted into.
* gpt-auto logic: support encrypted swap, add kernel cmdline option to force it, and honour a gpt bit about it, plus maybe a configuration file
* drop nss-myhostname in favour of nss-resolve?
* 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.
* in networkd, when matching device types, fix up DEVTYPE rubbish the kernel passes to us
* enable LockMLOCK to take a percentage value relative to physical memory
* Permit masking specific netlink APIs with RestrictAddressFamily=
* nspawn: support that /proc, /sys/, /dev are pre-mounted
* define gpt header bits to select volatility mode
* ProtectClock= (drops CAP_SYS_TIMES, adds seecomp filters for settimeofday, adjtimex), sets DeviceAllow o /dev/rtc
* ProtectTracing= (drops CAP_SYS_PTRACE, blocks ptrace syscall, makes /sys/kernel/tracing go away)
* ProtectMount= (drop mount/umount/pivot_root from seccomp, disallow fuse via DeviceAllow, imply Mountflags=slave)
* ProtectKeyRing= to take keyring calls away
* RemoveKeyRing= to remove all keyring entries of the specified user
* 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
* make sure the ratelimit object can deal with USEC_INFINITY as way to turn off things
* journalctl: make sure -f ends when the container indicated by -M terminates
* mount: automatically search for "main" partition of an image has multiple
partitions
* 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.
* add bus API for creating unit files in /etc, reusing the code for transient units
* 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)
* rework fopen_temporary() to make use of open_tmpfile_linkable() (problem: the
kernel doesn't support linkat() that replaces existing files, currently)
* transient units: don't bother with actually setting unit properties, we
reload the unit file anyway
* journald: sigbus API via a signal-handler safe function that people may call
from the SIGBUS handler
* optionally, also require WATCHDOG=1 notifications during service start-up and shutdown
* 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
* cache sd_event_now() result from before the first iteration...
* PID1: find a way how we can reload unit file configuration for
specific units only, without reloading the whole of systemd
* add an explicit parser for LimitRTPRIO= that verifies
the specified range and generates sane error messages for incorrect
specifications.
* when we detect that there are waiting jobs but no running jobs, do something
* push CPUAffinity= also into the "cpuset" cgroup controller
* PID 1 should send out sd_notify("WATCHDOG=1") messages (for usage in the --user mode, and when run via nspawn)
* 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.
http://lists.freedesktop.org/archives/systemd-devel/2015-June/032962.html
* fstab-generator: default to tmpfs-as-root if only usr= is specified on the kernel cmdline
* docs: bring http://www.freedesktop.org/wiki/Software/systemd/MyServiceCantGetRealtime up to date
* 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.
http://lists.freedesktop.org/archives/systemd-devel/2015-April/030229.html
* 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.
* networkd/udev: implement SR_IOV configuration in .link files:
http://lists.freedesktop.org/archives/systemd-devel/2015-January/027451.html
* hostnamectl: show root image uuid
* Find a solution for SMACK capabilities stuff:
http://lists.freedesktop.org/archives/systemd-devel/2014-December/026188.html
* "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)
* synchronize console access with BSD locks:
http://lists.freedesktop.org/archives/systemd-devel/2014-October/024582.html
* as soon as we have sender timestamps, revisit coalescing multiple parallel daemon reloads:
http://lists.freedesktop.org/archives/systemd-devel/2014-December/025862.html
* figure out when we can use the coarse timers
* add "systemctl start -v foobar.service" that shows logs of a service
while the start command runs. This is non-trivial to do without
races though, since we should flush out all journal messages before
returning from the "systemctl stop".
* firstboot: make it useful to be run immediately after yum --installroot to set up a machine. (most specifically, make --copy-root-password work even if /etc/passwd already exists
* maybe add support for specifier expansion in user.conf, specifically DefaultEnvironment=
* maybe allow timer units with an empty Units= setting, so that they
can be used for resuming the system but nothing else.
* what to do about udev db binary stability for apps? (raw access is not an option)
* systemctl: if some operation fails, show log output?
* exponential backoff in timesyncd when we cannot reach a server
* timesyncd: add ugly bus calls to set NTP servers per-interface, for usage by NM
* merge ~/.local/share and ~/.local/lib into one similar /usr/lib and /usr/share....
* add systemd.abort_on_kill or some other such flag to send SIGABRT instead of SIGKILL
(throughout the codebase, not only PID1)
* 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 (?)
- hook up resolved with machined-based address resolution
* refcounting in sd-resolve is borked
* Add a new verb "systemctl top"
* add new gpt type for btrfs volumes
* generator that automatically discovers btrfs subvolumes, identifies their purpose based on some xattr on them.
* a way for container managers to turn off getty starting via $container_headless= or so...
* figure out a nice way how we can let the admin know what child/sibling unit causes cgroup membership for a specific unit
* 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.
* add bus api to query unit file's X fields.
* gpt-auto-generator:
- Define new partition type for encrypted swap? Support probed LUKS for encrypted swap?
- Make /home automount rather than mount?
* 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
* MessageQueueMessageSize= (and suchlike) should use parse_iec_size().
* implement Distribute= in socket units to allow running multiple
service instances processing the listening socket, and open this up
for ReusePort=
* 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
* transient units:
- add field to transient units that indicate whether systemd or somebody else saves/restores its settings, for integration with libvirt
* when we detect low battery and no AC on boot, show pretty splash and refuse boot
* libsystemd-journal, libsystemd-login, libudev: add calls to easily attach these objects to sd-event event loops
* be more careful what we export on the bus as (usec_t) 0 and (usec_t) -1
* 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
* After coming back from hibernation reset hibernation swap partition using the /dev/snapshot ioctl APIs
* 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.
* refuse boot if /usr/lib/os-release is missing or /etc/machine-id cannot be set up
* man: the documentation of Restart= currently is very misleading and suggests the tools from ExecStartPre= might get restarted.
* load .d/*.conf dropins for device units
* 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
- GVariant
- path escaping
- update systemd.special(7) to mention that dbus.socket is only about the compatibility socket now
* 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
* investigate endianness issues of UUID vs. GUID
* 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.
* add a pam module that passes the hdd passphrase into the PAM stack and then expires it, for usage by gdm auto-login.
* add a pam module that on password changes updates any LUKS slot where the password matches
* test/:
- add unit tests for config_parse_device_allow()
* 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.
* when isolating, try to figure out a way how we implicitly can order
all units we stop before the isolating unit...
* teach ConditionKernelCommandLine= globs or regexes (in order to match foobar={no,0,off})
* Add ConditionDirectoryNotEmpty= handle non-absoute 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.
* BootLoaderSpec: Clarify that the kernel has to be in $BOOT. Clarify
that the boot loader should be installed to the ESP. Define a way
how an installer can figure out whether a BLS compliant boot loader
is installed.
* think about requeuing jobs when daemon-reload is issued? usecase:
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.
* systemd-inhibit: make taking delay locks useful: support sending SIGINT or SIGTERM on PrepareForSleep()
* remove any syslog support from log.c — we probably cannot do this before split-off udev is gone for good
* shutdown logging: store to EFI var, and store to USB stick?
* merge unit_kill_common() and unit_kill_context()
* EFI:
- honor language efi variables for default language selection (if there are any?)
- honor timezone efi variables for default timezone selection (if there are any?)
- change bootctl to be backed by systemd-bootd to control temporary and persistent default boot goal plus efi variables
* bootctl
- recognize the case when not booted on EFI
* maybe do not install getty@tty1.service symlink in /etc but in /usr?
* print a nicer explanation if people use variable/specifier expansion in ExecStart= for the first word
* mount: turn dependency information from /proc/self/mountinfo into dependency information between systemd units.
* 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().