Run:
./contrib/scripts/nm-code-format.sh -i
./contrib/scripts/nm-code-format.sh -i
Yes, it needs to run twice because the first run doesn't yet produce the
final result.
Signed-off-by: Antonio Cardace <acardace@redhat.com>
g_clear_pointer() would always cast the destroy notify function
pointer to GDestroyNotify. That means, it lost some type safety, like
GPtrArray *ptr_arr = ...
g_clear_pointer (&ptr_arr, g_array_unref);
Since glib 2.58 ([1]), g_clear_pointer() is also more type safe. But
this is not used by NetworkManager, because we don't set
GLIB_VERSION_MIN_REQUIRED to 2.58.
[1] f9a9902aac
We have nm_clear_pointer() to avoid this issue for a long time (pre
1.12.0). Possibly we should redefine in our source tree g_clear_pointer()
as nm_clear_pointer(). However, I don't like to patch glib functions
with our own variant. Arguably, we do patch g_clear_error() in
such a manner. But there the point is to make the function inlinable.
Also, nm_clear_pointer() returns a boolean that indicates whether
anything was cleared. That is sometimes useful. I think we should
just consistently use nm_clear_pointer() instead, which does always
the preferable thing.
Replace:
sed 's/\<g_clear_pointer *(\([^;]*\), *\([a-z_A-Z0-9]\+\) *)/nm_clear_pointer (\1, \2)/g' $(git grep -l g_clear_pointer) -i
Note that the name "NMSecretAgentOld" comes from when libnm was forked
from libnm-glib. There was a plan to rework the secret agent API and
replace it by a better one. That didn't happen (yet), instead our one
and only agent implementation is still lacking. Don't add a new API, instead
try to improve the existing one, without breaking existing users. Just
get over the fact that the name "NMSecretAgentOld" is ugly.
Also note how nm-applet uses NMSecretAgentOld. It subtypes a class
AppletAgent. The constructor applet_agent_new() is calling the synchronous
g_initable_init() initialization with auto-register enabled. As it was,
g_initable_init() would call nm_secret_agent_old_register(), and if the
"Register" call failed, initialization failed for good. There are even
unit tests that test this behavior. This is bad behavior. It means, when
you start nm-applet without NetworkManager running, it will fail to create
the AppletAgent instance. It would hence be the responsibility of the applet
to recover from this situation (e.g. by retrying after timeout or watching
the D-Bus name owner). Of course, nm-applet doesn't do that and won't recover
from such a failure.
NMSecretAgentOld must try hard not to fail and recover automatically. The
user of the API is not interested in implementing the registration,
unregistration and retry handling. Instead, it should just work best
effort and transparently to the user of the API.
Differences:
- no longer use gdbus-codegen generate bindings. Use GDBusConnection
directly instead. These generated proxies complicate the code by
introducing an additional, stateful layer.
- properly handle GMainContext and synchronous initialization by using an
internal GMainContext.
With this NMSecretAgentOld can be used in a multi threaded context
with separate GMainContext. This does not mean that the object
itself became thread safe, but that the GMainContext gives the means
to coordinate multi-threaded access.
- there are no more blocking calls except g_initiable_init() which
iterates an internal GMainContext until initialization completes.
- obtaining the Unix user ID with "GetConnectionUnixUser" to authenticate
the server is now done asynchronously and only once per name-owner.
- NMSecretAgentOld will now register/export the Agent D-Bus object
already during initialization and stay registered as long as the
instance is alive. This is because usually registering a D-Bus
object would not fail, unless the D-Bus path is already taken.
Such an error would mean that another agent is registered for the same
GDBusConnection, that likely would be a bug in the caller. Hence,
such an issue is truly non-recoverable and should be reported early to
the user. There is a change in behavior compared to before, where previously
the D-Bus object would only be registered while the instance is enabled.
This makes a difference if the user intended to keep the NMSecretAgentOld
instance around in an unregistered state.
Note that nm_secret_agent_old_destroy() was added to really unregister
the D-Bus object. A destroyed instance can no longer be registered.
- the API no longer fully exposes the current registration state. The
user either enables or disables the agent. Then, in the background
NMSecretAgentOld will register, and serve requests as they come. It
will also always automatically re-register and it can de-facto no
longer fail. That is, there might be a failure to register, or the
NetworkManager peer might not be authenticated (non-root) or there
might be some other error, or NetworkManager might not be running.
But such errors are not exposed to the user. The instance is just not
able to provide the secrets in those cases, but it may recover if the
problem can be resolved.
- In particular, it makes no sense that nm_secret_agent_old_register*()
fails, returns an error, or waits until registration is complete. This
API is now only to enable/disable the agent. It is idempotent and
won't fail (there is a catch, see next point).
In particular, nm_secret_agent_old_unregister*() cannot fail anymore.
- However, with the previous point there is a problem/race. When you create
a NMSecretAgentOld instance and immediately afterwards activate a
profile, then you want to be sure that the registration is complete
first. Otherwise, NetworkManager might fail the activation because
no secret agent registered yet. A partial solution for this is
that g_initiable_init()/g_async_initable_init_async() will block
until registration is complete (or with or without success). That means,
if NetworkManager is running, initializing the NMSecretAgentOld will
wait until registration is complete (or failed). However, that does not
solve the race if NetworkManager was not running when creating the
instance.
To solve that race, the user may call nm_secret_agent_old_register_async()
and wait for the command to finish before starting activating. While
async registration no longer fails (in the sense of leaving the agent
permanently disconnected), it will try to ensure that we are
successfully registered and ready to serve requests. By using this
API correctly, a race can be avoided and the user can know that the
instance is now ready to serve request.
The test only uses one GMainContext (the g_main_context_get_default()
singleton.
Between tests, ensure that we iterate the main context long enough,
so that no more sources from the previous test are queued. Otherwise,
there is an ugly dependency between tests and the order in which
they run.
Use nmtstc_context_object_new() to create the NMSecretAgentOld. This
randomly uses sync or async initialization, and checks whether the
main context gets iterated.
The advantage of nmtstc_client_new() is that it randomly either uses the
synchronous or asynchronous constructor. Of course, both should behave
pretty much the same. Hence, this increases our test coverage.
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.
We commonly don't use the glib typedefs for char/short/int/long,
but their C types directly.
$ git grep '\<g\(char\|short\|int\|long\|float\|double\)\>' | wc -l
587
$ git grep '\<\(char\|short\|int\|long\|float\|double\)\>' | wc -l
21114
One could argue that using the glib typedefs is preferable in
public API (of our glib based libnm library) or where it clearly
is related to glib, like during
g_object_set (obj, PROPERTY, (gint) value, NULL);
However, that argument does not seem strong, because in practice we don't
follow that argument today, and seldomly use the glib typedefs.
Also, the style guide for this would be hard to formalize, because
"using them where clearly related to a glib" is a very loose suggestion.
Also note that glib typedefs will always just be typedefs of the
underlying C types. There is no danger of glib changing the meaning
of these typedefs (because that would be a major API break of glib).
A simple style guide is instead: don't use these typedefs.
No manual actions, I only ran the bash script:
FILES=($(git ls-files '*.[hc]'))
sed -i \
-e 's/\<g\(char\|short\|int\|long\|float\|double\)\>\( [^ ]\)/\1\2/g' \
-e 's/\<g\(char\|short\|int\|long\|float\|double\)\> /\1 /g' \
-e 's/\<g\(char\|short\|int\|long\|float\|double\)\>/\1/g' \
"${FILES[@]}"
tools/test-networkmanager-service.py is our NetworkManager stub server.
NetworkManager uses libnm(-core) heavily, for example to decide whether
a connection verifies (nm_connection_verify()) and for normalizing
connections (nm_connection_normalize()).
If the stub server wants to mimic NetworkManager, it also must use these
function. Luckily, we already can do so, by loading libnm using python
GObject introspection.
We already correctly set GI_TYPELIB_PATH search path, so that the
correct libnm is loaded -- provided that we build with introspection
enabled.
We still need to gracefully fail, if starting the stub server fails.
That requries some extra effort. If the stub server notices that
something is missing, it shall exit with status 77. That will cause
the tests to g_test_skip().
- All internal source files (except "examples", which are not internal)
should include "config.h" first. As also all internal source
files should include "nm-default.h", let "config.h" be included
by "nm-default.h" and include "nm-default.h" as first in every
source file.
We already wanted to include "nm-default.h" before other headers
because it might contains some fixes (like "nm-glib.h" compatibility)
that is required first.
- After including "nm-default.h", we optinally allow for including the
corresponding header file for the source file at hand. The idea
is to ensure that each header file is self contained.
- Don't include "config.h" or "nm-default.h" in any header file
(except "nm-sd-adapt.h"). Public headers anyway must not include
these headers, and internal headers are never included after
"nm-default.h", as of the first previous point.
- Include all internal headers with quotes instead of angle brackets.
In practice it doesn't matter, because in our public headers we must
include other headers with angle brackets. As we use our public
headers also to compile our interal source files, effectively the
result must be the same. Still do it for consistency.
- Except for <config.h> itself. Include it with angle brackets as suggested by
https://www.gnu.org/software/autoconf/manual/autoconf.html#Configuration-Headers
The unit tests for libnm and libnm-glib use a NetworkManager stub
service written in Python (test-networkmanager-service.py). As they
share the same server, it makes sense to also share the same utility
code to drive the stub.
Move the common code to include/.
Note that contrary to "nm-test-utils.h", "nm-test-libnm-utils.h" is not
a header-only file. Instead its implementation is in "nm-test-utils-impl.c".
The reason for that this split is, if we later have yet another non-header-only
test-utility, then all the implementations are in "nm-test-utils-impl.c", requiring
the tests to link only one object file.
Rather than randomly including one or more of <glib.h>,
<glib-object.h>, and <gio/gio.h> everywhere (and forgetting to include
"nm-glib-compat.h" most of the time), rename nm-glib-compat.h to
nm-glib.h, include <gio/gio.h> from there, and then change all .c
files in NM to include "nm-glib.h" rather than including the glib
headers directly.
(Public headers files still have to include the real glib headers,
since nm-glib.h isn't installed...)
Also, remove glib includes from header files that are already
including a base object header file (which must itself already include
the glib headers).
config.h should be included from every .c file, and it should be
included before any other include. Fix that.
(As a side effect of how I did this, this also changes us to
consistently use "config.h" rather than <config.h>. To the extent that
it matters [which is not much], quotes are more correct anyway, since
we're talking about a file in our own build tree, not a system
include.)
Move the definition of NMSecretAgentError to nm-errors, register it
with D-Bus, and verify in the tests that it maps correctly.
NM_SECRET_AGENT_ERROR_INTERNAL_ERROR is renamed to
NM_SECRET_AGENT_ERROR_FAILED, and NM_SECRET_AGENT_ERROR_NOT_AUTHORIZED
to NM_SECRET_AGENT_ERROR_PERMISSION_DENIED, for consistency with other
error domains. While NMSecretAgentError, unlike most other error
domains, has always been correctly mapped across D-Bus, the renaming
is not an ABI break, because the daemon never checks for either of
those values, so all versions of the daemon will treat
"org.freedesktop.NetworkManager.SecretAgent.InternalError" and
"org.freedesktop.NetworkManager.SecretAgent.Failed" the same (by just
ignoring the error name and keeping only the error message).
Make synchronous APIs take GCancellables, and make asynchronous APIs
use GAsyncReadyCallbacks and have names ending in "_async", with
"_finish" functions to retrieve the results.
Also, make nm_client_activate_connection_finish(),
nm_client_add_and_activate_finish(), and
nm_remote_settings_add_connection_finish() be (transfer full) rather
than (transfer none), because the refcounting semantics become
slightly confusing in some edge cases otherwise.
Merge nm_remote_settings_add_connection() and
nm_remote_settings_add_connection_unsaved(), and likewise
nm_remote_connection_commit_changes() and
nm_remote_connection_commit_changes_unsaved(), by adding a boolean
flag to each saying whether to save to disk.
Port libnm-core/libnm to GDBus.
The NetworkManager daemon continues to use dbus-glib; the
previously-added connection hash/variant conversion methods are now
moved to NetworkManagerUtils (along with a few other utilities that
are now only needed by the daemon code).
In preparation for porting to GDBus, make nm_connection_to_dbus(),
etc, represent connections as GVariants of type 'a{sa{sv}}' rather
than as GHashTables-of-GHashTables-of-GValues.
This means we're constantly converting back and forth internally, but
this is just a stepping stone on the way to the full GDBus port, and
all of that code will go away again later.
Make register() and unregister() have cancellable sync and async
variants. And make NMSecretAgent implement GInitable/GAsyncInitable,
and do the initial auto-registration as part of initialization rather
than doing it asynchronously and emitting a signal.
Implement some basic secret agent functionality in
test-networkmanager-service.py, and add test-secret-agent to test that
NMSecretAgent works as expected.
