| Commit message (Collapse) | Author | Age | Files | Lines |
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Previously, we would always add routes with netlink message flags
NLM_F_CREATE | NLM_F_REPLACE, akin `ip route replace`.
Using this form of RTM_NEWROUTE message, we could only add a certain
route with a certain network/plen,metric triple once. That was already
hugely inconvenient, because
- when configuring routes, multiple (managed) interfaces may get
conflicting routes. Only one of the routes can be actually configured
using `ip route replace`, so we need to track routes that are
currently shaddowed.
- when configuring routes, we might replace externally configured
routes on unmanaged interfaces.
That was worked around by introducing NMRouteManager (and
NMDefaultRouteManager). NMRouteManager would keep a list of the routes
that NetworkManager would like to configure, even if momentarily being
unable to do so due to conflicting routes. This worked mostly well but
was rather complicated, involving bumping metrics (to avoid conflicts
for device routes that were required to configure gateway routes).
Drop that now. Use the corresponding of `ip route append` to configure
routes. This allows NM to confiure (almost) all routes that it cares.
Especially, it can configure all routes on a managed interface, without
replacing/interfering with routes on other interfaces. Hence,
NMRouteManager becomes mostly obsolete.
This is a bit more complicated because:
- when adding an IPv4 address, kernel will automatically create a device route
for the subnet. We should avoid that using IFA_F_NOPREFIXROUTE flag for addresses
(still to-do). But as kernel may not support that flag for IPv4 addresses yet, we still
need functionality like nm_route_manager_ip4_route_register_device_route_purge_list().
This functionality now moves to NMDevice, which tracks a blacklist of device routes
that shall be removed.
- trying to configure an IPv6 route with a source address will be rejected
by kernel, as long as the address is tentative (see related bug rh#1457196).
Preferably, NMDevice keeps the list of routes that should be configured
while kernel would have the list of what actually is configured. There is a
feed-back loop where both affect each other (for example, when externally deleting
a route, NMDevice must forget about it too). Previously, NMRouteManager would also
keep track of routes that the device would like to configure, but currently cannot (due
to conflicting routes on other devices).
We want to get rid of that. However, with IPv6 routes with source addresses, we cannot.
The tracking of such routes, that the device wants to configure, but currently cannot,
also goes to NMDevice.
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nmp_lookup_init_route_visible() was originally named this way, to only return routes
that are nmp_object_is_visible(). However, all routes are visible (as long as they are
nmp_object_is_alive()). Hence, this is a historic misnomer.
Also, passing @only_default FALSE is identical to the
nmp_lookup_init_addrroute() lookup.
So, rename the function to indicate it is a lookup for default routes
only. Also, get rid of the unsupported ifindex argument for which there
is no index.
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Deleting an IPv4 route with metric zero will either delete the intended route,
or if no such route exists, it will delete another existing route with different
metric (but otherwise matching parameters).
I think this is a shortcoming of the kernel API. It allows omitting
the metric during delete. However, it gives not way to express to
explicitly delete an IPv4 route with metric zero, but no other.
Since we only delete routes that we obtain from the platform cache
in the first place, we don't need the workaround. Of course, there
is still a race that platform cache might be out of date at the
moment we attempt to delete the route. Or the cache might be
inconsistent, both cases leading to deletion of the wrong route.
But such cases should be very rare, and only present when the user
changes the routing table outside of NM.
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Until now, NetworkManager's platform cache for routes used the quadruple
network/plen,metric,ifindex for equaliy. That is not kernel's
understanding of how routes behave. For example, with `ip route append`
you can add two IPv4 routes that only differ by their gateway. To
the previous form of platform cache, these two routes would wrongly
look identical, as the cache could not contain both routes. This also
easily leads to cache-inconsistencies.
Now that we have NM_PLATFORM_IP_ROUTE_CMP_TYPE_ID, fix the route's
compare operator to match kernel's.
Well, not entirely. Kernel understands more properties for routes then
NetworkManager. Some of these properties may also be part of the ID according
to kernel. To NetworkManager such routes would still look identical as
they only differ in a property that is not understood. This can still
cause cache-inconsistencies. The only fix here is to add support for
all these properties in NetworkManager as well. However, it's less serious,
because with this commit we support several of the more important properties.
See also the related bug rh#1337855 for kernel.
Another difficulty is that `ip route replace` and `ip route change`
changes an existing route. The replaced route has the same
NM_PLATFORM_IP_ROUTE_CMP_TYPE_WEAK_ID, but differ in the actual
NM_PLATFORM_IP_ROUTE_CMP_TYPE_ID:
# ip -d -4 route show dev v
# ip monitor route &
# ip route add 192.168.5.0/24 dev v
192.168.5.0/24 dev v scope link
# ip route change 192.168.5.0/24 dev v scope 10
192.168.5.0/24 dev v scope 10
# ip -d -4 route show dev v
unicast 192.168.5.0/24 proto boot scope 10
Note that we only got one RTM_NEWROUTE message, although from NMPCache's
point of view, a new route (with a particular ID) was added and another
route (with a different ID) was deleted. The cumbersome workaround is,
to keep an ordered list of the routes, and figure out which route was
replaced in response to an RTM_NEWROUTE. In absence of bugs, this should
work fine. However, as we only rely on events, we might wrongly
introduce a cache-inconsistancy as well. See the related bug rh#1337860.
Also drop nm_platform_ip4_route_get() and the like. The ID of routes
is complex, so it makes little sense to look up a route directly.
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NMPCache can preserve the order of the objects. Until now, the order
was however arbitrary. Soon we will require to preserve the order of
routes.
During a dump, force appending new objects at the end. That ensures,
correct ordering during the dump.
Note that we track objects in several distrinct indexes. Those partition the
set of all objects. Outside a dump when receiving events about new objects (e.g.
RTM_NEWROUTE), it is very unclear at which place the new object should be sorted.
It is especially unclear, as an object might move from one partition (of
an index) to another.
In general, a deterministic order will only be useful in one particular
instance: the NMP_CACHE_ID_TYPE_ROUTES_BY_DESTINATION index for routes.
In this case, we will ensure a particular order of the routes.
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This allows to reorder elements in NMDedupMultiIndex.
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Also log the nlmsg_flags, they will be useful for RTM_NEWROUTE messages.
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IPv6 routes without source are common. Simplify the output in this case.
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Default g_log() logs to stdout for INFO level and higher, but logs to stderr
for DEBUG/TRACE. That is annoying, because especially when redirecting the streams,
the messages get mixed up. Install a log handler and just print to stdout for
the tests.
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While rebasing systemd from upstream the "sd-adapt/process-util.h" file
was renamed and few other header files were added in the sources.
Update Makefile.am.
Fixes: e0cdaf9880929a40f60c1327cf67f800feefc951
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https://bugzilla.gnome.org/show_bug.cgi?id=786131
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- fix DHCP over Infiniband
https://bugzilla.redhat.com/show_bug.cgi?id=1477678
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This is a direct dump from systemd git on 2017-08-09, git commit
c7f6ca9379279affa8f22d15fa13063491f86a49.
======
SYSTEMD_DIR=../systemd
COMMIT=c7f6ca9379279affa8f22d15fa13063491f86a49
(
cd "$SYSTEMD_DIR"
git checkout "$COMMIT"
git reset --hard
git clean -fdx
)
git ls-files :/src/systemd/src/ | xargs -d '\n' rm -f
nm_copy_sd() {
mkdir -p "./src/systemd/$(dirname "$1")"
cp "$SYSTEMD_DIR/$1" "./src/systemd/$1"
}
nm_copy_sd "src/basic/alloc-util.c"
nm_copy_sd "src/basic/alloc-util.h"
nm_copy_sd "src/basic/async.h"
nm_copy_sd "src/basic/escape.c"
nm_copy_sd "src/basic/escape.h"
nm_copy_sd "src/basic/ether-addr-util.c"
nm_copy_sd "src/basic/ether-addr-util.h"
nm_copy_sd "src/basic/extract-word.c"
nm_copy_sd "src/basic/extract-word.h"
nm_copy_sd "src/basic/fileio.c"
nm_copy_sd "src/basic/fileio.h"
nm_copy_sd "src/basic/fd-util.c"
nm_copy_sd "src/basic/fd-util.h"
nm_copy_sd "src/basic/fs-util.c"
nm_copy_sd "src/basic/fs-util.h"
nm_copy_sd "src/basic/hash-funcs.c"
nm_copy_sd "src/basic/hash-funcs.h"
nm_copy_sd "src/basic/hashmap.c"
nm_copy_sd "src/basic/hashmap.h"
nm_copy_sd "src/basic/hexdecoct.c"
nm_copy_sd "src/basic/hexdecoct.h"
nm_copy_sd "src/basic/hostname-util.c"
nm_copy_sd "src/basic/hostname-util.h"
nm_copy_sd "src/basic/in-addr-util.c"
nm_copy_sd "src/basic/in-addr-util.h"
nm_copy_sd "src/basic/io-util.c"
nm_copy_sd "src/basic/io-util.h"
nm_copy_sd "src/basic/list.h"
nm_copy_sd "src/basic/log.h"
nm_copy_sd "src/basic/macro.h"
nm_copy_sd "src/basic/mempool.h"
nm_copy_sd "src/basic/mempool.c"
nm_copy_sd "src/basic/parse-util.c"
nm_copy_sd "src/basic/parse-util.h"
nm_copy_sd "src/basic/path-util.c"
nm_copy_sd "src/basic/path-util.h"
nm_copy_sd "src/basic/prioq.h"
nm_copy_sd "src/basic/prioq.c"
nm_copy_sd "src/basic/process-util.h"
nm_copy_sd "src/basic/process-util.c"
nm_copy_sd "src/basic/random-util.c"
nm_copy_sd "src/basic/random-util.h"
nm_copy_sd "src/basic/refcnt.h"
nm_copy_sd "src/basic/set.h"
nm_copy_sd "src/basic/signal-util.h"
nm_copy_sd "src/basic/siphash24.c"
nm_copy_sd "src/basic/siphash24.h"
nm_copy_sd "src/basic/socket-util.c"
nm_copy_sd "src/basic/socket-util.h"
nm_copy_sd "src/basic/sparse-endian.h"
nm_copy_sd "src/basic/stdio-util.h"
nm_copy_sd "src/basic/string-table.c"
nm_copy_sd "src/basic/string-table.h"
nm_copy_sd "src/basic/string-util.c"
nm_copy_sd "src/basic/string-util.h"
nm_copy_sd "src/basic/strv.c"
nm_copy_sd "src/basic/strv.h"
nm_copy_sd "src/basic/time-util.c"
nm_copy_sd "src/basic/time-util.h"
nm_copy_sd "src/basic/umask-util.h"
nm_copy_sd "src/basic/unaligned.h"
nm_copy_sd "src/basic/utf8.c"
nm_copy_sd "src/basic/utf8.h"
nm_copy_sd "src/basic/util.c"
nm_copy_sd "src/basic/util.h"
nm_copy_sd "src/libsystemd-network/arp-util.c"
nm_copy_sd "src/libsystemd-network/arp-util.h"
nm_copy_sd "src/libsystemd-network/dhcp6-internal.h"
nm_copy_sd "src/libsystemd-network/dhcp6-lease-internal.h"
nm_copy_sd "src/libsystemd-network/dhcp6-network.c"
nm_copy_sd "src/libsystemd-network/dhcp6-option.c"
nm_copy_sd "src/libsystemd-network/dhcp6-protocol.h"
nm_copy_sd "src/libsystemd-network/dhcp-identifier.c"
nm_copy_sd "src/libsystemd-network/dhcp-identifier.h"
nm_copy_sd "src/libsystemd-network/dhcp-internal.h"
nm_copy_sd "src/libsystemd-network/dhcp-lease-internal.h"
nm_copy_sd "src/libsystemd-network/dhcp-network.c"
nm_copy_sd "src/libsystemd-network/dhcp-option.c"
nm_copy_sd "src/libsystemd-network/dhcp-packet.c"
nm_copy_sd "src/libsystemd-network/dhcp-protocol.h"
nm_copy_sd "src/libsystemd-network/lldp-internal.h"
nm_copy_sd "src/libsystemd-network/lldp-neighbor.c"
nm_copy_sd "src/libsystemd-network/lldp-neighbor.h"
nm_copy_sd "src/libsystemd-network/lldp-network.c"
nm_copy_sd "src/libsystemd-network/lldp-network.h"
nm_copy_sd "src/libsystemd-network/network-internal.c"
nm_copy_sd "src/libsystemd-network/network-internal.h"
nm_copy_sd "src/libsystemd-network/sd-dhcp6-client.c"
nm_copy_sd "src/libsystemd-network/sd-dhcp6-lease.c"
nm_copy_sd "src/libsystemd-network/sd-dhcp-client.c"
nm_copy_sd "src/libsystemd-network/sd-dhcp-lease.c"
nm_copy_sd "src/libsystemd-network/sd-ipv4ll.c"
nm_copy_sd "src/libsystemd-network/sd-ipv4acd.c"
nm_copy_sd "src/libsystemd-network/sd-lldp.c"
nm_copy_sd "src/libsystemd/sd-event/sd-event.c"
nm_copy_sd "src/libsystemd/sd-id128/id128-util.c"
nm_copy_sd "src/libsystemd/sd-id128/id128-util.h"
nm_copy_sd "src/libsystemd/sd-id128/sd-id128.c"
nm_copy_sd "src/shared/dns-domain.c"
nm_copy_sd "src/shared/dns-domain.h"
nm_copy_sd "src/systemd/_sd-common.h"
nm_copy_sd "src/systemd/sd-dhcp6-client.h"
nm_copy_sd "src/systemd/sd-dhcp6-lease.h"
nm_copy_sd "src/systemd/sd-dhcp-client.h"
nm_copy_sd "src/systemd/sd-dhcp-lease.h"
nm_copy_sd "src/systemd/sd-event.h"
nm_copy_sd "src/systemd/sd-ndisc.h"
nm_copy_sd "src/systemd/sd-id128.h"
nm_copy_sd "src/systemd/sd-ipv4acd.h"
nm_copy_sd "src/systemd/sd-ipv4ll.h"
nm_copy_sd "src/systemd/sd-lldp.h"
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The bluetooth device *never* manages NAP connection. Hence, checking for
nm_bt_vtable_network_server in "nm-bluez-manager.c" is wrong.
Especially, because nm_bt_vtable_network_server is only initialized
much later, so during initial start, the bluetooth factory would wronly
claim to support it. This leads to a crash when having a NAP connection.
Also, the bridge factory requires the bluetooth plugin. It should only
claim to support NAP when the bluetooth plugin is present. That
way, we get a proper "missing plugin" error message, instead of failing
later during activation.
It seems to me, distributing the logic to various match_connection()
functions makes it more complicated, because the implementation is
spread out and interact in complicated ways. Anyway.
Fixes: 8665cdfefff50bb575eb03893d6361930bc8ad40
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Support for PPPoE on arbitrary devices.
https://bugzilla.gnome.org/show_bug.cgi?id=559134
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We can't tell pppd to create an interface with a given name, so we use
the name generated by kernel and rename the interface afterwards. A
race condition can happen during the rename: NM receives the interface
name from pppd, but in the meantime the interface could be deleted and
another one with that name could appear. In this case we would rename
the wrong interface.
Using a changing unit index, we ensure that interfaces created by NM
don't race with each others. There is still the chance to race with
externally-created interfaces, but I guess this is not easily solvable
since the pppd plugin does not expose the ifindex.
When the specified unit is already in use, the kernel selects another
one.
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Add code to NMPppDevice to activate new-style PPPoE connections. This
is a bit tricky because we can't create the link as usual in
create_and_realize(). Instead, we create a device without ifindex and
start pppd in stage2; when pppd reports a new configuration, we rename
the platform link to the correct name and set the ifindex into the
device.
This mechanism is inherently racy, but there is no way to tell pppd to
create an arbitrary interface name.
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For PPP devices we can't create a link in advance, as the link is
created by pppd when the connection is established.
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Make it possible to register different factories for the same setting
type, and add a match_connection() method to let each factory decide
if it's capable of handling a connection.
This will be used to decide whether a PPPoE connection must be handled
through the legacy Ethernet factory or through the new PPP factory.
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The new device type represents a PPP interface, and will implement the
activation of new-style PPPoE connections, i.e. the ones that don't
claim the parent device.
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We'll need it to rename the new PPP interface to a given name.
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When the property is set, it specifies the device on which PPPoE is to
be started. The ppp interface will be named as the
connection.interface-name property.
When the property is not set the previous behavior will be retained,
i.e. the PPPoE connection will be started on connection.interface-name
and the PPP interface will have a random name.
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- extend platform's route-compare() functions with a mode argument.
Most important is the new mode NM_PLATFORM_IP_ROUTE_CMP_TYPE_ID,
which corresponds kernels ID of how routes compare.
- when deleting routes, set all known parameters in the netlink message.
Previously we would omit paramters, but that causes kernel to delete
the first matching route.
- cleanup fields of routes
https://bugzilla.gnome.org/show_bug.cgi?id=785449
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Via the flags of the RTM_NEWROUTE netlink message, kernel and iproute2
support various variants to add a route.
- ip route add
- ip route change
- ip route replace
- ip route prepend
- ip route append
- ip route test
Previously, our nm_platform_ip4_route_add() function was basically
`ip route replace`. In the future, we should rather user `ip route
append` instead.
Anyway, expose the netlink message flags in the API. This allows to
use the various forms, and makes it also more apparent to the user that
they even exist.
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- kernel ignores rtm_tos for IPv6 routes. While iproute2 accepts it,
let libnm reject TOS attribute for routes as well.
- move the tos field from NMPlatformIPRoute to NMPlatformIP4Route.
- the tos field is part of the weak-id of an IPv4 route. Meaning,
`ip route add` can add routes that only differ by their TOS.
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iproute2 expects TOS in hex.
This is a change in behavior.
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nm_platform_ipx_route_cmp()
There are various notions of how to compare routes. Collect them all
in nm_platform_ip4_route_cmp(), nm_platform_ip4_route_hash(),
nm_platform_ip6_route_cmp(), and nm_platform_ip6_route_hash().
This way, we have them side-by-side, which makes the differences more
discoverable.
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It is valid to set "lock" for a property with numeric value 0.
# ip route append 192.168.7.0/24 dev bond0 window lock 0
# ip route append 192.168.7.0/24 dev bond0 window 0
# ip route append 192.168.7.0/24 dev bond0 window lock 10
# ip route append 192.168.7.0/24 dev bond0 window 10
# ip -4 -d route show dev bond0
unicast 192.168.7.0/24 proto boot scope link linkdown
unicast 192.168.7.0/24 proto boot scope link linkdown
unicast 192.168.7.0/24 proto boot scope link linkdown window lock 10
unicast 192.168.7.0/24 proto boot scope link linkdown window 10
Our to-string methods should accurately print the content of
the routes. Note that iproute2 fails to do so too.
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The mss (advmss, RTA_METRICS.RTAX_ADVMSS) is in a way part of
the ID for IPv4 routes. That is, you can add multiple IPv4 routes, that
only differ by mss.
On the other hand, that is not the case for IPv6. Two IPv6 routes
that only differ by mss are considered the same.
Another issue is, that you cannot selectively delete an IPv4 route based
on the mss:
ip netns del x
ip netns add x
IP() {
ip netns exec x ip "$@"
}
IP link add type veth
IP link set veth0 name v
IP link set veth1 up
IP link set v up
IP route append 192.168.7.0/24 dev v advmss 6
IP route append 192.168.7.0/24 dev v advmss 7
IP -d route show dev v
IP route delete 192.168.7.0/24 dev v advmss 7
IP -d route show dev v
It seems for deleting routes, kernel ignores mss (which doesn't really
matter for IPv6, but does so for IPv4).
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Routes may only differ by their gateway. When deleting
a route, we must specify the exact gateway to delete.
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Refactor _nl_msg_new_route() to obtain the route scope (rtm_scope)
from the NMPObject, instead of a separate argument.
That way, when deleting an IPv4 route, we don't pick the first route
that matches (RT_SCOPE_NOWHERE), but use the actual scope of the route
that we want to delete. That matters, if there are more then one
otherwise identical routes that only differ by their scope.
For kernel, the scope of IPv6 routes is always global
(RT_SCOPE_UNIVERSE).
Also, during ip4_route_add() initialize the intermediate @obj to have
the values as we expect them after adding the route. That is necessary
to use it in _nl_msg_new_route(). But also nicer for consistency.
Also, move the scope_inv field in NMPlatformIP4Route to let the other
in_addr_t fields life side by side.
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_nl_msg_new_route() should not get extra arguments, but instead
use all parameters from the NMPObject argument. This will allow
during nm_platform_ip_route_delete() to pick the exact route
that should be deleted.
Also, in ip4_route_add()/ip6_route_add(), keep the stack-allocated
@obj object consistent with what we expect to add. That is, set
the rt_source argument to the value of what the route will have
after kernel adds it. That might be necessary, because
do_add_addrroute() searches the cache for @obj.
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It can be implemented solely based on cmd_plobj_id_copy().
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Routes are complicated.
`ip route add` and `ip route append` behaves differently with respect to
determine whether an existing route is idential or not.
Extend the cmp() and hash() functions to have a compare type, that
covers the different semantics.
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Useful for sorting/comparing.
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platform-linux: event-notification: NEWROUTE, seq 5: fd02::2/128 via fd01::1 dev 17 metric 0 mss 0 rt-src rt-unspec src ::/0 cloned mtu 1400
NetworkManager:ERROR:src/platform/nmp-object.h:614:ASSERT_nmp_cache_ops: assertion failed: (obj_old || obj_new)
Fixes: 9440eefb6dc4939752bf049d1669a0a4d37213c2
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Since commit 22edeb5b691b ("core: track addresses for
NMIP4Config/NMIP6Config via NMDedupMultiIndex"), addresses can be
added to a IP config only after the ifindex has been set.
Fixes: 22edeb5b691befd796c534cf71901b32f0b7945b
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Fixes: 22edeb5b691befd796c534cf71901b32f0b7945b
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