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get_block_device_harder() returns == 0 if the fs is valid, but it is not
backed by a single devno. (As opposed to returning > 0 if the devno is
valid). Let's catch this case and log a clear message, and don't bother
open the device in that case.
This is mostly cosmetical, as either way, systemd-gpt-auto-generator
doesn't work in scenarios like that.
Prompted-by: #22504
device nodes with 0 dev_t are not real (and for that reason such inodes
are used as whiteouts in overlayfs, for example), hence refuse them
early. It seems wrong going to sysfs for something we know can't exist
anyway.
If the test logs contain lines like:
```
...systemd-resolved[735885]: profiling:/systemd-meson-build/src/shared/libsystemd-shared-250.a.p/base-filesystem.c.gcda:Cannot open
```
it means we're possibly missing some coverage since gcov can't write the stats,
usually due to the sandbox being too restrictive (e.g. ProtectSystem=yes,
ProtectHome=yes) or the $BUILD_DIR being inaccessible to non-root users.
to, hopefully, get rid of the following error:
```
2022-02-13 13:32:12 [ERROR] Failed to get [GITHUB_TOKEN]!
2022-02-13 13:32:12 [ERROR] []
2022-02-13 13:32:12 [ERROR] Please set a [GITHUB_TOKEN] from the main workflow environment to take advantage of multiple status reports!
```
The 'slim' version drops certain storage-heavy linters[0] which we don't
use anyway, so let's make the job a bit faster by downloading and using
a smaller image.
[0] https://github.com/github/super-linter#slim-image
Otherwise, the managed configs, that is addresses, routes and so on
configured by the previously assigned .network file will not be dropped
on reconfiguring the interface.
CIFuzz has been kind of broken for a couple months because
coverage reports downloaded from OSS-Fuzz contain absolute
paths while paths to files changed in PRs are relative and they
don't match. It makes it kind of hard for CIFuzz to figure out
what it should run so it runs either all fuzz targets or just new
fuzz targets. Until that issue is fixed let's just always predictably run
all fuzz targets.
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
This effectively disables warnings about type/mode/ownership of existing
directories when recursively creating parent directories. (Or files. If there's
a file in a place we expect a directory, the code will later try to create
a file and fail. This follows the general pattern where we do (void)mkdir()
if the mkdir() is immediately followed by opening of a file.)
I was recently debugging an issue with the fstab-generator [1], and it says:
'Directory "/tmp" already exists, but has mode 0777 that is too permissive (0644 was requested), refusing.'
which is very specific but totally wrong in this context.
This output was added in 37c1d5e97d, and I still
think it is worth to do it, because if you actually *do* want the directory, if
there's something wrong, the precise error message will make it much easier to
diagnose. And we can't easily pass the information what failed up the call chain
because there are multiple things we check (ownership, permission mask, type)…
So passing a param whether to warn or not down into the library code seems like
the best solution, despite not being very elegant.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=2051285
when they go down resolved prints
```
Event source mdns-ipv4 (type io) returned error, disabling
```
instead of
```
Event source n/a (type io) returned error, disabling
```
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".
Every time I need it I have to first relearn autopkgtest and find where
all the necessary stuff lives, so let's document it somewhere close to
systemd for (at least) future me.
Try to ensure kernel IPv6 link local address generation occurs by
setting the per-if addr_gen_mode sysctl when the link is already up,
instead of the netlink interface (IFLA_INET6_ADDR_GEN_MODE).
The netlink setting is sufficient in cases where the interface is not
yet up when networkd configures an interface - bringing the interface
up will trigger in-kernel address generation.
If the interface is already up, yet the interface has no IPv6LL assigned
setting IFLA_INET6_ADDR_GEN_MODE has no effect.
Writing the addr_gen_mode sysctl is a best effort attempt at triggering
address generation regardless of interface state because it also works
in cases where the interface is already up.
Fixes#22424.
In cbcdcaaa0e ("Add support for conditions on the machines firmware")
a new Firmware= directive was added for .netdev and .network files.
While it was also documented to work on .link files, in actual fact the
support was missing. Add that one extra line to make it work, and also
update the fuzzer directives.
