-
-
Notifications
You must be signed in to change notification settings - Fork 0
/
TODO
1130 lines (845 loc) · 53.2 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.
External:
* Fedora: add an rpmlint check that verifies that all unit files in the RPM are listed in %systemd_post macros.
* wiki: update journal format documentation for lz4 additions
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:
* 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
* 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.
* dissector: invoke fsck on the file systems we encounter, after all ext4 is
still pretty popular (and we mount the ESP too with it after all, which is
fat)
* systemd-firstboot: teach it dissector magic, so that you can point it to some
disk image and it will just set everything in it all behind the scenes.
* systemd-firstboot: add --force mode that replaces existing configuration.
* 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: 1) to force first-boot mode + 2) 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
[email protected], which returns the XDG_RUNTIME_DIR value, and make this
behaviour selectable via pam module option.
* 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.
* optionally, if a per-partition GPT flag is set for the root/home/… partitions
format the partition on next boot and unset the flag, in order to implement
factory reset. also, add a second flag that simply indicates whether such a
scheme is supported. then, add a tool (or maybe beef up systemd-dissect) to
show state of these flags, and optionally trigger such a factory reset on
next boot by setting the flag.
* 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
* maybe set a special xattr on cgroups that have delegate=yes set, to make it
easy to mark cut points, then use this information in "systemd-cgls" to show
them (e.g. color delegated subtrees in a different color)
* 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
enqeue 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 autodetection 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 fallback 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
* tree-wide: ensure we always block the signals we hook into with
sd_event_add_signal() first
* 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
* 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
* maybe use SOURCE_DATE_EPOCH (i.e. the env var the reproducible builds folks
introduced) as the RTC epoch, instead of the mtime of NEWS.
* 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=.
* replace all remaining uses of fgets() + LINE_MAX by read_line()
* 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
* Maybe add a small tool invoked early at boot, that adds in or resizes
partitions automatically, to be used when the media used is actually larger
than the image written onto it is.
* Maybe add PrivatePIDs= as new unit setting, and do minimal PID namespacing
after all. Be strict however, only support the equivalent of nspawn's
--as-pid2 switch, and sanely proxy sd_notify() messages dropping stuff such
as MAINPID.
* 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.
* maybe introduce gpt auto discovery for /var/tmp?
* maybe add gpt-partition-based user management: each user gets his own
LUKS-encrypted GPT partition with a new GPT type. A small nss module
enumerates users via udev partition enumeration. UIDs are assigned in a fixed
way: the partition index is added as offset to some fixed base uid. User name
is stored in GPT partition name. A PAM module authenticates the user via the
LUKS partition password. Benefits: strong per-user security, compatibility
with stateless/read-only/verity-enabled root. (other idea: do this based on
loopback files in /home, without GPT involvement)
* gpt-auto logic: introduce support for discovering /var matching an image. For
that, use a partition type UUID that is hashed from the OS name (as encoded
in /etc/os-release), the architecture, and 4 new bits from the gpt flags
field of the root partition. This way can easily support multiple OS
installations on the same GPT partition table, without problems with
unmatched /var partitions.
* 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 [email protected]. 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
* ProtectKernelLogs= (drops CAP_SYSLOG, add seccomp for syslog() syscall, and DeviceAllow to /dev/kmsg) in service files
* 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...
* add systemctl stop --job-mode=triggering that follows TRIGGERED_BY deps and adds them to the same transaction
* 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 (only after the cpuset controller got ported to the unified hierarchy)
* 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
* in systemctl list-unit-files: show the install value the presets would suggest for a service in a third column
* 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)
* man: maybe use the word "inspect" rather than "introspect"?
* systemctl: if some operation fails, show log output?
* systemctl edit: use equivalent of cat() to insert existing config as a comment, prepended with #.
Upon editor exit, lines with one # are removed, lines with two # are left with one #, etc.
* 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....
* systemd.show_status= should probably have a mode where only failed
units are shown.
* 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
* support empty /etc boots nicely:
- nspawn/gpt-generator: introduce new gpt partition type for /usr
* 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=
* introduce bus call FreezeUnit(s, b), as well as "systemctl freeze
$UNIT" and "systemctl thaw $UNIT" as wrappers around this. The calls
should SIGSTOP all unit processes in a loop until all processes of
it are fully stopped. This can later be used for app management by
desktop UIs such as gnome-shell to freeze apps that are not visible
on screen, not unlike how job control works on the shell
* 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, ...
- generate a failure of a default event loop is executed out-of-thread
* 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})
* 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 [email protected] 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().
- 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 sesison 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
* 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.
- fallback 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
- journactl: support negative filtering, i.e. FOOBAR!="waldo",
and !FOOBAR for events without FOOBAR.
- journal: store timestamp of journal_file_set_offline() int he 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.
- change systemd-journal-flush into a service that stays around during
boot, and causes the journal to be moved back to /run on shutdown,
so that we do not keep /var busy. This needs to happen synchronously,
hence doing this via signals is not going to work.
- optionally support running journald from the command line for testing purposes in external projects
- journald: allow per-priority and per-service retention times when rotating/vacuuming
- journald: make use of uid-range.h to managed uid ranges to split
journals in.
- journalctl: add the ability to look for the most recent process of a binary. journalctl /usr/bin/X11 --pid=-1 or so...
- 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 their 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
* 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.)
* document:
- document that deps in [Unit] sections ignore Alias= fields in
[Install] units of other units, unless those units are disabled
- man: clarify that time-sync.target is not only sysv compat but also useful otherwise. Same for similar targets
- 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
- man: maybe sort directives in man pages, and take sections from --help and apply them to man too
- document root=gpt-auto properly
* 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
- "systemctl disable" on a static unit prints no message and does
nothing. "systemctl enable" does nothing, and gives a bad message
about it. Should fix both to print nice actionable messages.
- 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
- systemctl status output should include list of triggering units and their status
* 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
* timer units:
- timer units should get the ability to trigger when:
o DST changes
- Modulate timer frequency based on battery state
* add libsystemd-password or so to query passwords during boot using the password agent logic
* clean up date formatting and parsing so that all absolute/relative timestamps we format can also be parsed
* on shutdown: move utmp, wall, audit logic all into PID 1 (or logind?), get rid of systemd-update-utmp-runlevel
* make repeated alt-ctrl-del presses printing a dump
* hostnamed: before returning information from /etc/machine-info.conf check the modification data and reread. Similar for localed, ...
* currently x-systemd.timeout is lost in the initrd, since crypttab is copied into dracut, but fstab is not
* 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.
* dissect
- refuse mounting over a mount point
- automatically discover .roothash files in dissect, similarly to nspawn
* 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 [email protected], 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
* cryptsetup:
- cryptsetup-generator: allow specification of passwords in crypttab itself
- support rd.luks.allow-discards= kernel cmdline params in cryptsetup generator
* hw watchdog: optionally try to use the preset watchdog timeout instead of always overriding it
https://bugs.freedesktop.org/show_bug.cgi?id=54712
* add a dependency on standard-conf.xml and other included files to man pages
* MountFlags=shared acts as MountFlags=slave right now.
* properly handle loop back mounts via fstab, especially regards to fsck/passno
* initialize the hostname from the fs label of /, if /etc/hostname does not exist?
* 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
* There's currently no way to cancel fsck (used to be possible via C-c or c on the console)
* add option to sockets to avoid activation. Instead just drop packets/connections, see http://cyberelk.net/tim/2012/02/15/portreserve-systemd-solution/
* 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
* support crash reporting operation modes (https://live.gnome.org/GnomeOS/Design/Whiteboards/ProblemReporting)
* be able to specify a forced restart of service A where service B depends on, in case B
needs to be auto-respawned?
* tmpfiles:
- apply "x" on "D" too (see patch from William Douglas)
- replace F with f+.
- instead of ignoring unknown fields, reject them.
- creating new directories/subvolumes/fifos/device nodes
should not follow symlinks. None of the other adjustment or creation
calls follow symlinks.
* make sure systemd-ask-password-wall does not shutdown systemd-ask-password-console too early
* 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
* Make it possible to set the keymap independently from the font on
the kernel cmdline. Right now setting one resets also the other.
* and a dbus call to generate target from current state
* write blog stories about:
- hwdb: what belongs into it, lsusb
- enabling dbus services
- how to make changes to sysctl and sysfs attributes
- remote access
- how to pass throw-away units to systemd, or dynamically change properties of existing units
- testing with Harald's awesome test kit
- auto-restart
- how to develop against journal browsing APIs
- the journal HTTP iface
- non-cgroup resource management
- dynamic resource management with cgroups
- refreshed, longer missions statement
- calendar time events
- init=/bin/sh vs. "emergency" mode, vs. "rescue" mode, vs. "multi-user" mode, vs. "graphical" mode, and the debug shell
- how to create your own target
- instantiated apache, dovecot and so on
- hooking a script into various stages of shutdown/rearly booot
* investigate whether the gnome pty helper should be moved into systemd, to provide cgroup support.
* dot output for --test showing the 'initial transaction'
* 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...
http://lists.freedesktop.org/archives/systemd-devel/2015-February/028076.html
- maybe introduce WantsMountsFor=? Usecase:
http://lists.freedesktop.org/archives/systemd-devel/2015-January/027729.html
- recreate systemd's D-Bus private socket file on SIGUSR2
- move PAM code into its own binary
- 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