Building against older libc/kernel headers can fail, because our glue
code for systemd has issues. Fix them by forward declaring "struct
statx" and by disabling parts of "socket-util.c".
(cherry picked from commit b7e08f685d)
When configuring with sanitizers enabled, ./configure.ac sets
-DVALGRIND=1 in the CFLAGS.
This causes a compilation error later:
$ /bin/sh ./libtool --tag=CC --mode=compile gcc ... -DVALGRIND=1 ... src/dhcp/nm-dhcp-nettools.c
...
In file included from src/dhcp/nm-dhcp-nettools.c:16:
./shared/systemd/sd-adapt-shared/nm-sd-adapt-shared.h:73: error: "VALGRIND" redefined [-Werror]
#define VALGRIND 0
$ git shortlog -n -s a3e75f3294 -- shared/systemd/sd-adapt-shared/nm-sd-adapt-shared.h src/systemd/sd-adapt-core/nm-sd-adapt-core.c src/systemd/sd-adapt/nm-sd-adapt.'[hc]' src/systemd/nm-sd-adapt.'[hc]' src/dhcp-manager/systemd-dhcp/nm-sd-adapt.'[hc]'
46 Thomas Haller
7 Beniamino Galvani
3 Lubomir Rintel
2 Dan Williams
2 Dan Winship
1 Glenn Washburn
1 Jiří Klimeš
Note that the contribution to the file by Glenn was removed in
commit e27b15c00d ('all: remove CLOCK_BOOTTIME defintions'), so
it is no longer relevant.
All other contributors agreed to the relicensing according to "RELICENSE.md".
We no longer add these. If you use Emacs, configure it yourself.
Also, due to our "smart-tab" usage the editor anyway does a subpar
job handling our tabs. However, on the upside every user can choose
whatever tab-width he/she prefers. If "smart-tabs" are used properly
(like we do), every tab-width will work.
No manual changes, just ran commands:
F=($(git grep -l -e '-\*-'))
sed '1 { /\/\* *-\*- *[mM]ode.*\*\/$/d }' -i "${F[@]}"
sed '1,4 { /^\(#\|--\|dnl\) *-\*- [mM]ode/d }' -i "${F[@]}"
Check remaining lines with:
git grep -e '-\*-'
The ultimate purpose of this is to cleanup our files and eventually use
SPDX license identifiers. For that, first get rid of the boilerplate lines.
From the files under "shared/nm-utils" we build an internal library
that provides glib-based helper utilities.
Move the files of that basic library to a new subdirectory
"shared/nm-glib-aux" and rename the helper library "libnm-core-base.la"
to "libnm-glib-aux.la".
Reasons:
- the name "utils" is overused in our code-base. Everything's an
"utils". Give this thing a more distinct name.
- there were additional files under "shared/nm-utils", which are not
part of this internal library "libnm-utils-base.la". All the files
that are part of this library should be together in the same
directory, but files that are not, should not be there.
- the new name should better convey what this library is and what is isn't:
it's a set of utilities and helper functions that extend glib with
funcitonality that we commonly need.
There are still some files left under "shared/nm-utils". They have less
a unifying propose to be in their own directory, so I leave them there
for now. But at least they are separate from "shared/nm-glib-aux",
which has a very clear purpose.
(cherry picked from commit 80db06f768)
"shared/nm-utils" contains general purpose utility functions that only
depend on glib (and extend glib with some helper functions).
We will also add code that does not use glib, hence it would be good
if the part of "shared/nm-utils" that does not depend on glib, could be
used by these future projects.
Also, we use the term "utils" everywhere. While that covers the purpose
and content well, having everything called "nm-something-utils" is not
great. Instead, call this "nm-std-aux", inspired by "c-util/c-stdaux".
(cherry picked from commit b434b9ec07)
On Fedora rawhide we get the following build failure:
In file included from shared/systemd/src/basic/alloc-util.c:3:
./shared/systemd/sd-adapt-shared/nm-sd-adapt-shared.h:114:21: error: static declaration of 'gettid' follows non-static declaration
114 | static inline pid_t gettid(void) {
| ^~~~~~
In file included from /usr/include/unistd.h:1170,
from /usr/include/glib-2.0/gio/gcredentials.h:32,
from /usr/include/glib-2.0/gio/gio.h:46,
from ./shared/nm-utils/nm-macros-internal.h:31,
from ./shared/nm-default.h:293,
from ./shared/systemd/sd-adapt-shared/nm-sd-adapt-shared.h:22,
from shared/systemd/src/basic/alloc-util.c:3:
/usr/include/bits/unistd_ext.h:34:16: note: previous declaration of 'gettid' was here
34 | extern __pid_t gettid (void) __THROW;
| ^~~~~~
glibc supports now gettid() call ([1]) which conflicts with our compat
implementation. Rename it.
[1] https://sourceware.org/git/?p=glibc.git;a=commit;h=1d0fc213824eaa2a8f8c4385daaa698ee8fb7c92
(cherry picked from commit 10276322bd)
NetworkManager is single-threaded and uses a mainloop.
However, sometimes we may need multiple threads. For example, we will
need to write sysctl values asynchronously, using the glib thread-pool.
For that to work, we also need to switch the network-namespace of the
thread-pool thread. We want to use NMPNetns for that. Hence it's better
to have NMPNetns thread-safe, instead of coming up with a duplicate
implementation. But NMPNetns may want to log, so we also need nm-logging
thread-safe.
In general, code under "shared/nm-utils" and nm-logging should be usable
from multiple threads. It's simpler to make this code thread-safe than
re-implementing it. Also, it's a bad limitation to be unable to log
from other threads. If there is an error, the best we can often do is to
log about it.
Make nm-logging thread-safe. Actually, we only need to be able to log
from multiple threads. We don't need to setup or configure logging from
multiple threads. This restriction allows us to access logging from the
main-thread without any thread-synchronization (because all changes in
the logging setup are also done from the main-thread).
So, while logging from other threads requires a mutex, logging from the
main-thread is lock-free.
For better or worse, we already pull in large parts of systemd sources.
I need a base64 decode implementation (because glib's g_base64_decode()
cannot reject invalid encodings). Instead of coming up with my own or
copy-paste if from somewhere, reuse systemd's unbase64mem().
But for that, make systemd's basic bits an independent static library
first because I will need it in libnm-core.
This doesn't really change anything except making "libnm-systemd-core.la"
an indpendent static library that could be used from "libnm-core". We
shall still be mindful about which internal code of systemd we use, and only
access functionality that is exposed via "systemd/nm-sd-utils-shared.h".
