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Lennart Poettering 26ded55709 random-seed: rework systemd-random-seed.service substantially 
This makes two major changes to the way systemd-random-seed operates:

1. We now optionally credit entropy if this is configured (via an env
var). Previously we never would do that, with this change we still don't
by default, but it's possible to enable this if people acknowledge that
they shouldn't replicate an image with a contained random seed to
multiple systems. Note that in this patch crediting entropy is a boolean
thing (unlike in previous attempts such as #1062), where only a relative
amount of bits was credited. The simpler scheme implemented here should
be OK though as the random seeds saved to disk are now written only with
data from the kernel's entropy pool retrieved after the pool is fully
initialized. Specifically:

2. This makes systemd-random-seed.service a synchronization point for
kernel entropy pool initialization. It was already used like this, for
example by systemd-cryptsetup-generator's /dev/urandom passphrase
handling, with this change it explicitly operates like that (at least
systems which provide getrandom(), where we can support this). This
means services that rely on an initialized random pool should now place
After=systemd-random-seed.service and everything should be fine. Note
that with this change sysinit.target (and thus early boot) is NOT
systematically delayed until the entropy pool is initialized, i.e.
regular services need to add explicit ordering deps on this service if
they require an initialized random pool.

Fixes: #4271
Replaces: #10621 #4513
2019-07-25 18:30:06 +02:00
..
user man,units: document what user "default.target" is a bit 2019-03-15 13:55:24 +01:00
user-.slice.d units: set StopWhenUnneeded= for the user slice units too 2018-10-13 12:59:29 +02:00
basic.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
bluetooth.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
boot-complete.target units: add generic boot-complete.target 2018-10-19 22:34:50 +02:00
console-getty.service.m4 unit,meson: drop .in suffix if no substitution is required (#8740) 2018-04-17 19:49:10 +02:00
container-getty@.service.m4 unit,meson: drop .in suffix if no substitution is required (#8740) 2018-04-17 19:49:10 +02:00
cryptsetup-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
cryptsetup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
debug-shell.service.in units: drop reference to sushell man page 2019-04-29 17:06:52 +02:00
dev-hugepages.mount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
dev-mqueue.mount units: set nodev,nosuid,noexec flags for various secondary API VFS 2019-03-25 19:39:00 +01:00
emergency.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
emergency.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
exit.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
final.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
getty-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
getty.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
getty@.service.m4 Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
graphical.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
halt.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
hibernate.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
hybrid-sleep.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-cleanup.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-network-generator.service.in units: add initrd-network-generator.service 2019-07-25 16:46:55 +09:00
initrd-parse-etc.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-root-device.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-root-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-switch-root.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-switch-root.target units: make sure initrd-cleanup.service terminates before switching to rootfs 2019-01-28 13:41:28 +01:00
initrd-udevadm-cleanup-db.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
kexec.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
kmod-static-nodes.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
ldconfig.service Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
local-fs-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
local-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
machine.slice Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
machines.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
meson-add-wants.sh scripts: use 4 space indentation 2019-04-12 08:30:31 +02:00
meson.build units: automatically initialize the system token if that makes sense 2019-07-25 18:20:50 +02:00
multi-user.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
network-online.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
network-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
network.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
nss-lookup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
nss-user-lookup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
paths.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
poweroff.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
printer.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
proc-sys-fs-binfmt_misc.automount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
proc-sys-fs-binfmt_misc.mount units: set nodev,nosuid,noexec flags for various secondary API VFS 2019-03-25 19:39:00 +01:00
quotaon.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rc-local.service.in man: add a systemd-rc-local-generator(8) man page 2017-12-26 12:13:51 +01:00
reboot.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
remote-cryptsetup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
remote-fs-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
remote-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rescue.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rescue.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rpcbind.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
serial-getty@.service.m4 Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
shutdown.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sigpwr.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sleep.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
slices.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
smartcard.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sockets.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sound.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
suspend-then-hibernate.target Fix description on suspend-then-hibernate units. 2018-03-28 15:26:18 -05:00
suspend.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
swap.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sys-fs-fuse-connections.mount units: set nodev,nosuid,noexec flags for various secondary API VFS 2019-03-25 19:39:00 +01:00
sys-kernel-config.mount units: set nodev,nosuid,noexec flags for various secondary API VFS 2019-03-25 19:39:00 +01:00
sys-kernel-debug.mount units: set nodev,nosuid,noexec flags for various secondary API VFS 2019-03-25 19:39:00 +01:00
sysinit.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
syslog.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
system-update-cleanup.service service: tweak capitalization of unit description 2019-05-24 10:48:28 +02:00
system-update-pre.target units: make system-update-pre.target a passive unit (#9349) 2018-06-20 12:46:18 +02:00
system-update.target units: fix typo in After= 2018-06-20 18:14:43 +02:00
systemd-ask-password-console.path emergency: make sure console password agents don't interfere with the emergency shell 2018-09-26 18:13:32 +02:00
systemd-ask-password-console.service.in emergency: make sure console password agents don't interfere with the emergency shell 2018-09-26 18:13:32 +02:00
systemd-ask-password-wall.path emergency: make sure console password agents don't interfere with the emergency shell 2018-09-26 18:13:32 +02:00
systemd-ask-password-wall.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-backlight@.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-binfmt.service.in fix url for binfmt documentation (#8720) 2018-04-14 15:15:19 +02:00
systemd-bless-boot.service.in add new systemd-bless-boot.service that marks boots as successful 2018-10-19 22:34:50 +02:00
systemd-boot-check-no-failures.service.in units: add simple boot check unit 2018-10-19 22:34:50 +02:00
systemd-boot-system-token.service.in units: automatically initialize the system token if that makes sense 2019-07-25 18:20:50 +02:00
systemd-coredump.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-coredump@.service.in units: turn on RestrictSUIDSGID= in most of our long-running daemons 2019-04-02 16:56:48 +02:00
systemd-exit.service units: fix Description= of systemd-exit.service 2018-11-16 12:25:35 +01:00
systemd-firstboot.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-fsck-root.service.in units: make fsck/grows/makefs/makeswap units conflict against shutdown.target 2018-11-26 22:18:16 +01:00
systemd-fsck@.service.in units: make fsck/grows/makefs/makeswap units conflict against shutdown.target 2018-11-26 22:18:16 +01:00
systemd-halt.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hibernate-resume@.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hibernate.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hostnamed.service.in units: turn on RestrictSUIDSGID= in most of our long-running daemons 2019-04-02 16:56:48 +02:00
systemd-hwdb-update.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hybrid-sleep.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-importd.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-initctl.service.in units: set NoNewPrivileges= for all long-running services 2018-11-12 19:02:55 +01:00
systemd-initctl.socket units: initctl: move the fifo to /run/initctl to match sysvinit 2018-03-30 16:52:14 -04:00
systemd-journal-catalog-update.service.in units: update catalog after systemd-tmpfiles runs 2019-03-14 11:28:19 +01:00
systemd-journal-flush.service.in units: automatically revert to /run logging on shutdown if necessary 2019-05-09 14:26:42 -04:00
systemd-journal-gatewayd.service.in core: imply NNP and SUID/SGID restriction for DynamicUser=yes service 2019-04-02 16:56:48 +02:00
systemd-journal-gatewayd.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-remote.service.in units: turn on RestrictSUIDSGID= in most of our long-running daemons 2019-04-02 16:56:48 +02:00
systemd-journal-remote.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-upload.service.in core: imply NNP and SUID/SGID restriction for DynamicUser=yes service 2019-04-02 16:56:48 +02:00
systemd-journald-audit.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journald-dev-log.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journald.service.in units: deny access to block devices 2019-06-20 14:03:57 +02:00
systemd-journald.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-kexec.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-localed.service.in units: turn on RestrictSUIDSGID= in most of our long-running daemons 2019-04-02 16:56:48 +02:00
systemd-logind.service.in units: make sure logind can properly reference drm char class 2019-07-23 13:30:56 +02:00
systemd-machine-id-commit.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-machined.service.in units: enable ProtectHostname=yes 2019-02-20 10:50:44 +02:00
systemd-modules-load.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-networkd-wait-online.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-networkd.service.in units: deny access to block devices 2019-06-20 14:03:57 +02:00
systemd-networkd.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-nspawn@.service.in nspawn: explicitly load units beforehand so that DeviceAllow= syntax works 2019-07-23 13:30:56 +02:00
systemd-portabled.service.in units: add SystemCallErrorNumber=EPERM to systemd-portabled.service 2019-07-08 13:47:04 +09:00
systemd-poweroff.service units: use SuccessAction=poweroff-force in systemd-poweroff.service 2018-10-17 19:31:50 +02:00
systemd-pstore.service.in pstore: run only when /sys/fs/pstore is not empty 2019-07-22 14:31:21 +09:00
systemd-quotacheck.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-random-seed.service.in random-seed: rework systemd-random-seed.service substantially 2019-07-25 18:30:06 +02:00
systemd-reboot.service units: use SuccessAction=reboot-force in systemd-reboot.service 2018-10-17 19:31:50 +02:00
systemd-remount-fs.service.in Pull in systemd-remount-fs.service only when required 2019-01-03 15:30:28 +01:00
systemd-resolved.service.in units: turn on RestrictSUIDSGID= in most of our long-running daemons 2019-04-02 16:56:48 +02:00
systemd-rfkill.service.in units: set NoNewPrivileges= for all long-running services 2018-11-12 19:02:55 +01:00
systemd-rfkill.socket units: order systemd-rfkill.socket after /var/lib/systemd/rfkill (#10904) 2018-11-24 23:59:37 +09:00
systemd-suspend-then-hibernate.service.in Fix description on suspend-then-hibernate units. 2018-03-28 15:26:18 -05:00
systemd-suspend.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-sysctl.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-sysusers.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-time-wait-sync.service.in units: document why systemd-time-wait-sync.service conditions on CAP_SYS_TIME (#8555) 2018-03-22 23:41:54 +03:00
systemd-timedated.service.in units: deny access to block devices 2019-06-20 14:03:57 +02:00
systemd-timesyncd.service.in Revert "timesyncd: add Conflicts for ntpd and chronyd" 2019-07-24 17:29:28 +02:00
systemd-tmpfiles-clean.service.in units: add time-set.target 2019-04-08 14:34:05 +02:00
systemd-tmpfiles-clean.timer Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-tmpfiles-setup-dev.service.in units: drop conditionalization of systemd-tmpfiles-setup-dev.service 2019-01-26 13:55:18 +01:00
systemd-tmpfiles-setup.service.in tmpfiles: Order tmpfiles-setup after journald 2018-09-20 13:20:41 +02:00
systemd-udev-settle.service.in man: add a page for systemd-udev-settle.service 2019-04-10 10:12:43 +02:00
systemd-udev-trigger.service.in units: let's use two ExecStart= lines instead of ; 2018-06-20 23:59:29 +02:00
systemd-udevd-control.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-udevd-kernel.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-udevd.service.in units: turn on RestrictSUIDSGID= in most of our long-running daemons 2019-04-02 16:56:48 +02:00
systemd-update-done.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-update-utmp-runlevel.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-update-utmp.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-user-sessions.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-vconsole-setup.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-volatile-root.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
time-set.target units: add time-set.target 2019-04-08 14:34:05 +02:00
time-sync.target units: add time-set.target 2019-04-08 14:34:05 +02:00
timers.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
tmp.mount man,units: link up new documentation about temporary directories 2019-02-20 18:31:18 +01:00
umount.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
usb-gadget.target units: add usb-gadget target 2019-02-15 18:16:27 +01:00
user-runtime-dir@.service.in units: use =yes rather than =true everywhere 2018-10-13 12:59:29 +02:00
user.slice Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
user@.service.in units: turn off keyring handling for user@.service 2019-03-19 10:58:20 +01:00
var-lib-machines.mount import: drop logic of setting up /var/lib/machines as btrfs loopback mount 2018-11-26 18:09:01 +01:00