If manager_loop() fails, we would print an error message, but then actually
ignore the error in main(), and potentially execute the shutdown binary.
I'm not sure how likely this is to happen in practice, but it seems sloppy.
So let's do the cleanup, but actually freeze() if manager_loop() returned
an error.
invoke_main_loop() is refactored to return the manager objective. This way
we don't need to pass a separate parameter to specify whether we are
reexecuting. Subsequent patch will make further use of the returned objective.
The cgroupid feature was not available in old cgroupvs2 kernels, hence
try to get it but if we can't because it's not supported, then only
debug log about it and proceed.
(We only needs this for cgroup bpf stuff, but that isn't available on
such old kernels anyway)
Fixes: #22483
Even though ISO C11 doesn't mandate in which order the type specifiers
should appear, having `unsigned` at the beginning of each type
declaration feels more natural and, more importantly, it unbreaks
Coccinelle, which has a hard time parsing `long unsigned` and others:
```
init_defs_builtins: /usr/lib64/coccinelle/standard.h
init_defs: /home/mrc0mmand/repos/systemd/coccinelle/macros.h
HANDLING: src/shared/mount-util.c
: 1: strange type1, maybe because of weird order: long unsigned
```
Most of the codebase already "complies", so let's fix the remaining
"offenders".
systemd[1016]: Failed to mount /tmp/app1 (type n/a) on /run/systemd/unit-extensions/1 (MS_BIND ): No such file or directory
systemd[1016]: Failed to create destination mount point node '/run/systemd/unit-extensions/1': File exists
A bind mount is added directly from private on the host to the actual
destination directory, no need for the symlinks (which cannot be created
as the bind mount happens first and creates the target as an actual directory)
Fixes https://github.com/systemd/systemd/issues/22264
When a Condition*= fails, and a service has Restart=always,
the service is not restarted.
Follow the same behaviour for ExecCondition= to avoid inconsistencies.
Fixes#22257
Rename the normalize_mounts() helper to drop_unused_mounts. All the
helpers called in there get rid of mounts that are unused for a variety
of reasons. And whereas the helpers are aptly prefixed with "drop" the
overall helper isn't and instead uses "normalize".
Make it more obvious what the helper actually does by renaming it from
normalize_mounts() to drop_unused_mounts(). Readers of code calling this
helper will immediately see that it will get rid of unused mounts.
Link: https://github.com/systemd/systemd/issues/22206
If a service requests both ProtectSubset=pid and ProtectHostname=true
then it will currently fail to start. The ProcSubset=pid option
instructs systemd to mount procfs for the service with subset=pid which
hides all entries other than /proc/<pid>. Consequently trying to
interact with the two files /proc/sys/kernel/{hostname,domainname}
covered by ProtectHostname=true will fail.
Fix this by only performing this check when ProtectSubset=pid is not
requested. Essentially ProtectSubset=pid implies/provides
ProtectHostname=true.
bpf-firewall and bpf-devices do not have names. This complicates
debugging with bpftool(8).
Assign names starting with 'sd_' prefix:
* firewall program names are 'sd_fw_ingress' for ingress attach
point and 'sd_fw_egress' for egress.
* 'sd_devices' for devices prog
'sd_' prefix is already used in source-compiled programs, e.g.
sd_restrictif_i, sd_restrictif_e, sd_bind6.
The name must not be longer than 15 characters or BPF_OBJ_NAME_LEN - 1.
Assign names only to programs loaded to kernel by systemd since
programs pinned to bpffs are already loaded.
Add a new setting that follows the same principle and implementation
as ExtensionImages, but using directories as sources.
It will be used to implement support for extending portable images
with directories, since portable services can already use a directory
as root.
Fixes#6308: people want to be able to link a unit file via 'systemctl enable'
from a git checkout or such and refer to other files in the same repo.
The new specifiers make that easy.
%y/%Y is used because other more obvious choices like %d/%D or %p/%P are
not available because at least on of the two letters is already used.
The new specifiers are only available in units. Technically it would be
trivial to add then in [Install] too, but I don't see how they could be
useful, so I didn't do that.
I added both %y and %Y because both were requested in the issue, and because I
think both could be useful, depending on the case. %Y to refer to other files
in the same repo, and %y in the case where a single repo has multiple unit files,
and e.g. each unit has some corresponding asset named after the unit file.
The BFQ weights are not passed verbatim to the kernel, provide that
information in a form of debug message so that users are not
surprised/confused when IOWeight != io.bfq.weight.
BPF_RAW_TRACEPOINT_OPEN is expected to work only on x86 and x86_64,
since BPF trampoline is implemented only on these architectures.
Attach probing by bpf_program__attach_lsm already happens in
`bpf_lsm_supported`. The resulting pointer can store libbpf error and
that is the case for unsupported architectures.
Add libbpf error check to `bpf_lsm_supported` so execution does not
reach the point where unit startup fails.
Zbigniew Jędrzejewski-Szmek
Lennart Poettering
Frantisek Sumsal
Luca Boccassi
Yu Watanabe
Luca Boccassi
James Hilliard
Julia Kartseva
Anita Zhang
Christian Brauner
Jan Janssen
Michal Koutný