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The (allow-none) annotation is deprecated since a long time now, it is better to
use (nullable) and/or (optional) which clarifies what it means with the (out)
annotation.
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/1551
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This is the version shipped in Fedora 37. As Fedora 37 is now out, the
core developers switch to it. Our gitlab-ci will also use that as base
image for the check-{patch.tree} tests and to generate the pages. There
is a need that everybody agrees on which clang-format version to use,
and that version should be the one of the currently used Fedora release.
Also update the used Fedora image in "contrib/scripts/nm-code-format-container.sh"
script.
The gitlab-ci still needs update in the following commit. The change
in isolation will break the "check-tree" test.
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It's not needed outside the source file, and lgtm.com complains
that global variables should have a long name.
Poor global variable name 'gl'. Prefer longer, descriptive names for
globals (eg. kMyGlobalConstant, not foo).
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gitlab-ci to f36
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gcc-12.0.1-0.8.fc36 is annoying with false positives.
It's related to g_error() and its `for(;;) ;`.
For example:
../src/libnm-glib-aux/nm-shared-utils.c: In function 'nm_utils_parse_inaddr_bin_full':
../src/libnm-glib-aux/nm-shared-utils.c:1145:26: error: dangling pointer to 'error' may be used [-Werror=dangling-pointer=]
1145 | error->message);
| ^~
/usr/include/glib-2.0/glib/gmessages.h:343:32: note: in definition of macro 'g_error'
343 | __VA_ARGS__); \
| ^~~~~~~~~~~
../src/libnm-glib-aux/nm-shared-utils.c:1133:31: note: 'error' declared here
1133 | gs_free_error GError *error = NULL;
| ^~~~~
/usr/include/glib-2.0/glib/gmessages.h:341:25: error: dangling pointer to 'addrbin' may be used [-Werror=dangling-pointer=]
341 | g_log (G_LOG_DOMAIN, \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
342 | G_LOG_LEVEL_ERROR, \
| ~~~~~~~~~~~~~~~~~~~~~~~
343 | __VA_ARGS__); \
| ~~~~~~~~~~~~
../src/libnm-glib-aux/nm-shared-utils.c:1141:13: note: in expansion of macro 'g_error'
1141 | g_error("unexpected assertion failure: could parse \"%s\" as %s, but not accepted by "
| ^~~~~~~
../src/libnm-glib-aux/nm-shared-utils.c:1112:14: note: 'addrbin' declared here
1112 | NMIPAddr addrbin;
| ^~~~~~~
I think the warning could potentially be useful and prevent real bugs.
So don't disable it altogether, but go through the effort to suppress it
at the places where it currently happens.
Note that NM_PRAGMA_WARNING_DISABLE_DANGLING_POINTER macro only expands
to suppressing the warning with __GNUC__ equal to 12. The purpose is to
only suppress the warning where we know we want to. Hopefully other gcc
versions don't have this problem.
I guess, we could also write a NM_COMPILER_WARNING() check in
"m4/compiler_options.m4", to disable the warning if we detect it. But
that seems too cumbersome.
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We use clang-format for automatic formatting of our source files.
Since clang-format is actively maintained software, the actual
formatting depends on the used version of clang-format. That is
unfortunate and painful, but really unavoidable unless clang-format
would be strictly bug-compatible.
So the version that we must use is from the current Fedora release, which
is also tested by our gitlab-ci. Previously, we were using Fedora 34 with
clang-tools-extra-12.0.1-1.fc34.x86_64.
As Fedora 35 comes along, we need to update our formatting as Fedora 35
comes with version "13.0.0~rc1-1.fc35".
An alternative would be to freeze on version 12, but that has different
problems (like, it's cumbersome to rebuild clang 12 on Fedora 35 and it
would be cumbersome for our developers which are on Fedora 35 to use a
clang that they cannot easily install).
The (differently painful) solution is to reformat from time to time, as we
switch to a new Fedora (and thus clang) version.
Usually we would expect that such a reformatting brings minor changes.
But this time, the changes are huge. That is mentioned in the release
notes [1] as
Makes PointerAligment: Right working with AlignConsecutiveDeclarations. (Fixes https://llvm.org/PR27353)
[1] https://releases.llvm.org/13.0.0/tools/clang/docs/ReleaseNotes.html#clang-format
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nm_g_timeout_add_seconds_source()
There is g_idle_add(), g_timeout_add() and g_timeout_add_seconds().
We have alternatives nm_g_idle_add_source() and
nm_g_timeout_add_source().
I find the previous name nm_g_timeout_add_source_seconds() inconsistent
with the pattern, and get it always wrong on first try. Rename.
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nm-sudo and nm-dispatcher are very similar from a high level. Both are D-Bus activated
services that exit on idle and all they do, is to provide a simple D-Bus API with no
objects or properties.
Hence it's not surprising that they follow the same structure.
Rename the code to make them look more similar.
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After we released the well-known name (or if we failed to ever request
it), we must exit as fast as possible, so that a new instance can
be started to serve new requests.
At that point, reject new requests because they are targeted against the
unique name, which they should not do (when talking to a D-Bus activated
service that exits on idle, it's important to talk to the well-known
name).
Also, if we receive SIGTERM, start releasing the name. We are told to
shut down, and must do so in a timely manner. Again, new requests shall
not be served by this instance.
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This is only for testing the service. As nm-dispatcher is D-Bus activated,
have a simple method to test whether it works.
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The advantage of environment variables is that the user can use
`systemctl edit NetworkManager-dispatcher.service` for setting them,
without need to change the ExecStart= line.
Also, enabling debugging from the start is useful, despite that debug
logging can be enabled per-request.
Also, there is a difference whether we want verbose logging or whether
we want to log to stdout. There should be a flag, that only increases the
logging verbosity, but does not change the logging backend.
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- exit-on-idle needs to be done correctly. Fix the race, by first
notifying systemd (STOPPING=1), releasing the name, and all the
while continue processing requests.
- don't use g_bus_own_name_on_connection(). That one also listens
to NameLost and NameAcquired signals, but we don't care about those.
systemd will take care to only spawn one process at a time. And
anyway, the well-known name is only important to be reachable, we
don't require it to be functional. We can get the first request
before RequestName completed and we can continue getting requests
after releasing the name.
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- use nm_g_timeout_add_source() for millisecond precision of idle timeout.
- schedule the first idle timeout before registering the D-Bus object.
- let the signal handler do nothing, if we are already quitting. In
practice, this only silences the extra logging.
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The difference is that nm_g_bus_get_blocking() iterates the GMainContext
of the caller, and thus it can process and handle SIGTERM signals.
Calling g_bus_get_sync() does not iterate the context, and we cannot
handle or detect early cancellation.
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The very first and the very last thing we want to do is
register (unregister) the signal handler.
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Explicitly iterating the context is more flexible, as we can control the
parameters how long we iterate. GMainLoop is essentially a (thread-safe)
iteration around one boolean flag (controlled by g_main_loop_run() and
g_main_loop_quit()). We can maintain that boolean flag ourselves.
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We require these, otherwise we can get a linker error about
_nm_utils_monotonic_timestamp_initialized symbol being undefined.
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We get it now always by "nm-macros-internal.h".
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(cherry picked from commit 326dde6d53a2352d51585a07255e7d25bd0a6c08)
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Originally, we would define G_LOG_DOMAIN via CFLAGS arguments.
Since commit 341b6e0704da ('all: change G_LOG_DOMAIN to "nm"') we would
instead set it in source and uniformly define it as "nm".
The reasons are that most parts of our source should not use g_log() directly,
and there is an aim to avoid special CFLAGS to simplify the build setup.
However, dispatcher indeed uses g_log() for logging, so the value there
is important.
Fix that, but this time by setting the define in source not via
CFLAGS.
Fixes: 341b6e0704da ('all: change G_LOG_DOMAIN to "nm"')
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