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This reverts PR #22587 and its follow-up commit. More specifically,
2299b1cae32c1fb8911da0ce26efced68032f4f8 (partially),
e176f855278d5098d3fecc5aa24ba702147d42e0,
ceb46a31a01b3d3d1d6095d857e29ea214a2776b, and
51bb9076ab8c050bebb64db5035852385accda35.
The PR was merged without final approval, and has several issues:
- OSS fuzz reported issues in the conf parser,
- It calls synchrnous netlink call, it should not be especially in PID1,
- The importance of NFTSet for CGroup and DynamicUser may be
questionable, at least, there was no justification PID1 should support
it.
- For networkd, it should be implemented with Request object,
- There is no test for the feature.
Fixes#23711.
Fixes#23717.
Fixes#23719.
Fixes#23720.
Fixes#23721.
Fixes#23759.
Replace the call to the `end.service` with `systemctl poweroff`, since
it seems to cause issues no matter what `--job-mode=` is used:
```
[ 129.070993] testsuite-21.sh[380]: ++ systemctl start --job-mode=flush end.service
[ 129.154985] testsuite-21.sh[912]: Failed to start end.service: Transaction for end.service/start is destructive (sysinit.target has 'stop' job queued, but 'start' is included in transaction).
[ 129.159636] testsuite-21.sh[912]: See system logs and 'systemctl status end.service' for details.
```
Also, add a "safety net" which bypasses the manager and does the
poweroff directly, since sometimes the D-Bus call performed by
`systemctl` might timeout (as the manager might be still processing data
from the fuzzing):
```
[ 115.776778] sh[894]: + systemctl poweroff --no-block
[ 166.164242] testsuite-21.sh[893]: Failed to start transient service unit: Connection timed out
[ 166.269289] sh[894]: Call to PowerOff failed: Connection timed out
```
Otherwise it oversaturates the journal, which in some cases can't keep
up with the load of messages (due to the performance penalty caused by
sanitizers), and gets killed by a watchdog.
since we delete the guest journals as part of the save_journal() step in
check_result_common(), making journal inaccessible from the custom check
hooks.
Let's keep the debug logs in the journal, while logging only
testsute-*.sh stdout/stderr to the console (ba7abf7). This should make
the test output log a bit more readable and potentially the tests itself
a bit faster by avoiding console oversaturation.
Also, it should significantly reduce the size of artifacts kept by CIs.
Let's detect & wrap binaries which are linked against systemd DSOs and
we're running under ASan, since otherwise running such binaries ends
with:
```
==633==ASan runtime does not come first in initial library list; you should either link runtime to your application or manually preload it with LD_PRELOAD.
```
`global` is needed only when assigning a new value to the global
variable; it's not necessary when modifying a mutable object (in our
case we just append items to the global list).
New directive `DynamicUserNFTSet=` provides a method for integrating
configuration of dynamic users into firewall rules with NFT sets.
Example:
```
table inet filter {
set u {
typeof meta skuid
}
chain service_output {
meta skuid != @u drop
accept
}
}
```
```
/etc/systemd/system/dunft.service
[Service]
DynamicUser=yes
DynamicUserNFTSet=inet:filter:u
ExecStart=/bin/sleep 1000
[Install]
WantedBy=multi-user.target
```
```
$ sudo nft list set inet filter u
table inet filter {
set u {
typeof meta skuid
elements = { 64864 }
}
}
$ ps -n --format user,group,pid,command -p `pgrep sleep`
USER GROUP PID COMMAND
64864 64864 55158 /bin/sleep 1000
```
New directives `NFTSet=`, `IPv4NFTSet=` and `IPv6NFTSet=` provide a method for
integrating configuration of dynamic networks into firewall rules with NFT
sets.
/etc/systemd/network/eth.network
```
[DHCPv4]
...
NFTSet=netdev:filter:eth_ipv4_address
```
```
table netdev filter {
set eth_ipv4_address {
type ipv4_addr
flags interval
}
chain eth_ingress {
type filter hook ingress device "eth0" priority filter; policy drop;
ip saddr != @eth_ipv4_address drop
accept
}
}
```
```
sudo nft list set netdev filter eth_ipv4_address
table netdev filter {
set eth_ipv4_address {
type ipv4_addr
flags interval
elements = { 10.0.0.0/24 }
}
}
```
