Add '_nm_setting_bond_get_option_or_default()' and move all the custom
policies applied by NM for bond options in there.
One such example of a custom policy is to set 'miimon' to 0 (instead of its
default value of 100) if 'arp_interval' is explicitly enabled
and 'miimon' is not.
This means removing every piece of logic from
nm_setting_bond_add_option() which used to clear out 'arp_interval' and
'arp_ip_target' if 'miimon' was set or clear out 'miimon' along with
'downdelay', 'updelay' and 'miimon' if 'arp_interval' was set.
This behaviour is a bug since the kernel allow setting any combination
of this options for bonds and NetworkManager should not limit the user
to do so.
Also use 'set_bond_attr_or_default()' instead of 'set_bond_attr()' as
the former calls '_nm_setting_bond_get_option_or_default()' to implement
the right logic to retrieve bond options according to current bond
configuration.
Doing 'verify()' with options such as 'miimon' and 'num_grat_arp' set to
arbitrary values it's not consistent with what NetworkManager does to
bond options when activating the bond through 'apply_bonding_config()'
(at a later stage) because the said values do not
correspond to what the default values for those options are.
This leads to an inconsistency with the 'miimon' parameter for example,
where 'verify()' is done while assuming it's 0 if not set but its
default value is actually 100.
Fixes: 8775c25c33 ('libnm: verify bond option in defined order')
G_PARAM_CONSTRUCT cause to explicitly initialize the property during
object construction. This is an unnecessary overhead that we can easily
avoid.
The overhead is because G_PARAM_CONSTRUCT parameters are always set with
g_object_set() before calling constructed(). Even if they are not specified
during g_object_new(), in which case it calls set with the property's default
value. This also requires g_object_new() to iterate all properties to
find and sort the construct properties.
NMSetting are supposed to be simple classes. They don't need to have
their properties initialized before object construction completes.
Especially if the default values are NULL or zero, in which case there
is nothing to do. If the default value is not NULL or zero, we need
to initialize the field instead in the nm_setting*_init() function.
In total, we register 447 property informations. Out of these,
326 are plain, GObject property based without special implementations.
The NMSettInfoProperty had all function pointers directly embedded,
currently this amounts to 5 function pointers and the "dbus_type" field.
That means, at runtime we have 326 times trivial implementations with
waste 326*6*8 bytes of NULL pointers. We can compact these by moving
them to a separate structure.
Before:
447 * 5 function pointers
447 * "dbus_type" pointer
= 2682 pointers
After:
447 * 1 pointers (for NMSettInfoProperty.property_type)
89 * 6 pointers (for the distinct NMSettInfoPropertType data)
= 981 pointers
So, in total this saves 13608 byes of runtime memory (on 64 bit arch).
The 89 NMSettInfoPropertType instances are the remaining distinct instances.
Note that every NMSettInfoProperty has a "property_type" pointer, but most of them are
shared. That is because the underlying type and the operations are the same.
Also nice is that the NMSettInfoPropertType are actually constant,
static fields and initialized very early.
This change also makes sense form a design point of view. Previously,
NMSettInfoProperty contained both per-property data (the "name") but
also the behavior. Now, the "behavioral" part is moved to a separate
structure (where it is also shared). That means, the parts that are
concerned with the type of the property (the behavior) are separate
from the actual data of the property.
This is a complete refactoring of the bluetooth code.
Now that BlueZ 4 support was dropped, the separation of NMBluezManager
and NMBluez5Manager makes no sense. They should be merged.
At that point, notice that BlueZ 5's D-Bus API is fully centered around
D-Bus's ObjectManager interface. Using that interface, we basically only
call GetManagedObjects() once and register to InterfacesAdded,
InterfacesRemoved and PropertiesChanged signals. There is no need to
fetch individual properties ever.
Note how NMBluezDevice used to query the D-Bus properties itself by
creating a GDBusProxy. This is redundant, because when using the ObjectManager
interfaces, we have all information already.
Instead, let NMBluezManager basically become the client-side cache of
all of BlueZ's ObjectManager interface. NMBluezDevice was mostly concerned
about caching the D-Bus interface's state, tracking suitable profiles
(pan_connection), and moderate between bluez and NMDeviceBt.
These tasks don't get simpler by moving them to a seprate file. Let them
also be handled by NMBluezManager.
I mean, just look how it was previously: NMBluez5Manager registers to
ObjectManager interface and sees a device appearing. It creates a
NMBluezDevice object and registers to its "initialized" and
"notify:usable" signal. In the meantime, NMBluezDevice fetches the
relevant information from D-Bus (although it was already present in the
data provided by the ObjectManager) and eventually emits these usable
and initialized signals.
Then, NMBlue5Manager emits a "bdaddr-added" signal, for which NMBluezManager
creates the NMDeviceBt instance. NMBluezManager, NMBluez5Manager and
NMBluezDevice are strongly cooperating to the point that it is simpler
to merge them.
This is not mere refactoring. This patch aims to make everything
asynchronously and always cancellable. Also, it aims to fix races
and inconsistencies of the state.
- Registering to a NAP server now waits for the response and delays
activation of the NMDeviceBridge accordingly.
- For NAP connections we now watch the bnep0 interface in platform, and tear
down the device when it goes away. Bluez doesn't send us a notification
on D-Bus in that case.
- Rework establishing a DUN connection. It no longer uses blocking
connect() and does not block until rfcomm device appears. It's
all async now. It also watches the rfcomm file descriptor for
POLLERR/POLLHUP to notice disconnect.
- drop nm_device_factory_emit_component_added() and instead let
NMDeviceBt directly register to the WWan factory's "added" signal.
Add test for checking the meta data for expected consistency.
This is also useful if you want to check something about the meta data
programatically.
For example, if you have the question which (if any) properties
are GObject based but also implement a to_dbus_fcn() function. Then you
can extend this code with some simple printf debugging to get a list of
those.
Or, if you want to find how many NMSettInfoProperty instances are in
static data (e.g. to determine how much memory is used). You can easily
modify this code to count them (and find 447 properties). Out of these,
326 are plain GObject based properties. Meaning, we could refactor the
code to create smaller NMSettInfoProperty instances for those, saving
thus (326 * 4 * sizeof (gpointer)) bytes (10K).
Such questions are interesting when refactoring the code.
nm_connection_get_setting() returns a pointer of type NMSetting.
That is very inconvenient, because most callers will need the
the result pointer as a setting subtype (like NMSettingConnection).
That would be like g_object_new() returning a "GObject *" pointer,
which is technically correct but annoying.
In the past that problem was avoided by having countless accessors
like nm_connection_get_setting_ip4_config(), etc. But that just blows
up the API and also is not generic. Meaning: the type is not a function
argument but the function itself. That makes composing the code harder
as the setting type cannot be treated generically (as a function argument).
Anyway. Add an internal wrapper that returns a void pointer.
WireGuard's wq-quick configures such rules to avoid routing loops.
While we currently don't have an automatic solution for this, at least
we should support it via explicit user configuration.
One problem is that suppress_prefixlength is relatively new and kernel
might not support this attribute. That can lead to odd results, because
the NetworkManager is valid but it cannot be configured on the current
kernel. But this is a general problem, and we would require a general
solution. The solution cannot be to only support rule attributes that
are supported by the oldest possible kernel. It's not clear how much of
a problem there really is, or which general solution is required (if
any).
nmtst_connection_assert_unchanging() registers to the changed signals
and asserts that they are not invoked. The purpose is that sometimes
we want to keep a reference to an NMConnection and be sure that it does
not get modified. This allows everybody to keep a reference to the very
same connection instance without cloning it -- provided they too promise
not to change it. This assert is to ensure that.
Note that NMSimpleConnection.dispose() clears the secrets and thus upon
destruction the assertion fails. At that point, the assertion is no longer
relevant, because the purpose was to ensure that no alive instances gets
modified. While destroying the instance, it's fine to modify it (nobody should
have a reference to it anymore).
This avoids the assertion failure when destroying a NMSimpleConnection with secrets
that is set with nmtst_connection_assert_unchanging().
At various places we only want to serialize agent-owned secrets. Without this
flag, we need to clone the setting first, then drop the secrets, then serialize
to D-Bus. Add a serialization flag to avoid that.
The name ("with") and the meaning of the flag is chosen in a way, that
there could be multiple such flags (NM_CONNECTION_SERIALIZE_WITH_SECRETS_NOT_REQUIRED),
and specifying at least one of them, would have the meaning to whitelist
flags of this kind. Specifying non of these "with" flags would have the
meaning of specifying *all*. Currently there is only one kind, so the name
and meaning is slightly counter intuitive.
- in _nm_connection_ensure_normalized() allow also to only check that
the UUID is as expected, without really resetting it.
- split the normalization part out of nm_connection_normalize() and
reuse it in _nm_connection_ensure_normalized(). As we already verified
the connnection, we know that normalization is due and don't need to
verify again.
