Commit 797f3cafee ('device: fall back to saved use_tempaddr value
instead of rereading /proc') changed the behaviour of how to get the
last resort default value for ip6-privacy property.
Previously we read it from /proc/sys/net/ipv6/conf/default, buf after
this commit we started to read /proc/sys/net/ipv6/conf/<iface> instead,
because the user might have set a different value specific for that device.
As NetworkManager changes that value on connection activation, we used
the value read at the time that NetworkManager was started.
Commit 6cb14ae6a6 ('device: introduce ipv6.temp-valid-lifetime and
ipv6.temp-preferred-lifetime properties') introduced 2 new IPv6 privacy
related properties relying on the same mechanism.
However, this new behaviour is problematic because it's not predictable
nor reliable:
- NetworkManager is normally started at boot time. That means that, if a
user wants to set a new value to /proc/sys/net/ipv6/conf/<iface>,
NetworkManager is likely alread running, so the change won't take
effect.
- If NetworkManager is restarted it will read the value again, but this
value can be the one set by NetworkManager itself in the last
activation. This means that different values can be used as default in
the same system boot depending on the restarts of NetworkManager.
Moreover, this weird situation might happen:
- Connection A with ip6-privacy=2 is activated
- NetworkManager is stopped. The value in
/proc/sys/net/ipv6/conf/<iface>/use_tempaddr remains as 2.
- NetworkManager starts. It reads from /proc/sys/... and saves the value
'2' as the default.
- Connection B with no ip6-privacy setting is activated. The '2' saved
as default value is used. The connection didn't specify any value for
it, and the value '2' was set by another connection for that specific
connection only, not manually by a user that wanted '2' to be the
default.
A user shouldn't have to think on when NetworkManager starts or restarts
to known in an easy and predictable way what the default value for
certain property is. It's totally counterintuitive.
Revert back to the old behaviour of reading from
/proc/sys/net/ipv6/conf/default. Although this value is used by the
kernel only for newly created interfaces, and not for already existing
ones, it is reasonable to think on these settings as "systemwide
defaults" that the user has chosen.
Note that setting a different default in NetworkManager.conf still takes
precedence.
The D-Bus and C APIs admit setting the 802.1X certificates as blobs, as
the documentation of the properties explains. However, this is not
possible from nmcli, where only path to the certificates' files is possible.
This difference in nmcli was explained in the description message that
is shown in nmcli's editor, but this is a documentation that most users
won't ever see, and still the main documentation in nm-settings-nmcli is
missleading.
Add a nmcli specific documentation for the relevant properties and
remove the nmcli's editor descriptions as they are no longer needed.
In the gtkdoc comments, the text below tags like `Since: 1.2` is
discarded. In the property `autoconnect-slaves` a line indicating its
deprecation was below one of these tags. As a result, it was missing in
the man page. Fix it.
Fixes: 194455660d ('connection: deprecate NMSettingConnection autoconnect-slaves property')
Replaced by full_path:
https://mesonbuild.com/Reference-manual_returned_external_program.html#external_programpath
ExternalProgram.full_path was added in meson 0.55 but we support meson
>= 0.51. Because of that, use path or full_path conditionally depending
on the meson version.
This gets rid of the following deprecation warning:
NOTICE: Future-deprecated features used:
* 0.48.0: {'module python3'}
* 0.55.0: {'ExternalProgram.path'}
Instead, meson.current_source_root or meson.project_source_root should
be used:
https://mesonbuild.com/Reference-manual_builtin_meson.html#mesonsource_root
Also, the documentation referenced above suggest to use `files()` as a
better alternative to refer to files, so do that at the same time.
This gets rid of the deprecation warning:
NOTICE: Future-deprecated features used:
* 0.56.0: {'meson.source_root'}
When IPv6 privacy extensions are enabled, by default temporary addresses
have a valid lifetime of 1 week and a preferred lifetime of 1 day.
That's far too long for privacy-conscious users, some of whom want a new
address once every few seconds. Add connection options that correspond
to /proc/sys/net/ipv6/conf/*/temp_valid_lft and
/proc/sys/net/ipv6/conf/*/temp_prefered_lft to allow configuring the
address rotation time on a per-connection basis.
The new properties are defined as 32-bit signed integers to match the
sysctl parameters which are also signed, although currently only
positive numbers are valid.
Setting for wpa_supplicant openssl_ciphers - openssl sometimes moves
ciphers among SECLEVELs. That is generaly a good thing, but some servers
are too old to support newer ciphers. Thus expert user should be allowed
to define openssl_ciphers per connection, so that they can connect to
old server, while not compromising security of other connections.
Introduce a new option to NMSettingIpConfig. The new option is ternary
type being the default value set to disabled. When enabled,
NetworkManager will instruct the DHCP client to send RELEASE message
when IP addresses are being removed.
The new option at NMSettingConnection allow the user to specify if the
connection needs to be down when powering off the system. This is useful
for IP address removal prior powering off. In order to accomplish that,
we listen on "Shutdown" systemd DBus signal.
The option is set to FALSE by default, it can be specified globally on
configuration file or per profile.
Add a new "generic.device-handler" property that specifies the name of
a dispatcher script to be invoked to add and delete the interface for
this connection.
Add property to allow changing the eswitch mode between legacy SRIOV and
switchdev. Allow also to set "preserve" to prevent NM from modifying the
eswitch mode.
Currently the internal DHCP client sets traffic class "CS6" in the DS
field of the IP header for outgoing packets.
dhclient sets the field according to the definition of TOS (RFC 1349),
which was was deprecated in 1998 by RFC 2474 in favor of DSCP.
Introduce a new property IPvX.dhcp-dscp (currently valid only for
IPv4) to specify a custom DSCP value for DHCP backends that support it
(currently, only the internal one).
Define the default value to CS0, because:
- section 4.9 of RFC 4594 specifies that DHCP should use the standard
(CS0 = 0) service class;
- section 3.2 says that class CS6 is for "transmitting packets
between network devices (routers) that require control (routing)
information to be exchanged between nodes", listing "OSPF, BGP,
ISIS, RIP" as examples of such traffic. Furthermore, it says that:
User traffic is not allowed to use this service class. By user
traffic, we mean packet flows that originate from user-controlled
end points that are connected to the network.
- we got reports of some Cisco switches dropping DHCP packets because
of the CS6 marking.
To embrace inclusive language, deprecate the NMSettingConnection
slave-type property and introduce port-type property.
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
A duplicate address is a serious issue which leads to non-working
setups or problems hard to debug. Enable IPv4 duplicate address
detection (aka ACD, RFC 5227) by default to detect such problems.
While the RFC recommends a timeout of 9 seconds, a comment in n-acd
sources says:
A 9s timeout for successful link setups is not acceptable today.
Hence, we will just go forward and ignore the proposed values. On
both wired and wireless local links round-trip latencies of below
3ms are common. We require the caller to set a timeout multiplier,
where 1 corresponds to a total probe time between 0.5 ms and 1.0
ms. On modern networks a multiplier of about 100 should be a
reasonable default. To comply with the RFC select a multiplier of
9000.
Set a default timeout of 200ms, which is the double of the value
suggested in n-acd sources. 200ms sounds quick enough, and gives at
least ~100ms to other hosts to reply.
See also the Fedora change proposal:
https://fedoraproject.org/wiki/Changes/Enable_IPv4_Address_Conflict_Detection
The supervision address is read-only. It is constructed by kernel and
only the last byte can be modified by setting the multicast-spec as
documented indeed.
As 1.46 was not released yet, we still can drop the whole API for this
setting property. We are keeping the NMDeviceHsr property as it is a
nice to have for reading it.
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/1823
Fixes: 5426bdf4a1 ('HSR: add support to HSR/PRP interface')
With `nmcli connection modify`, later options should overwrite earlier
ones. That did not work correctly with
nmcli --offline connection add type wifi \
wifi.ssid xxxx \
wifi.cloned-mac-address permanent \
wifi.mac-address-randomization 0
That's because "wifi.mac-address-randomization" is a mostly redundant
alias for certain "wifi.cloned-mac-address" options, and libnm does
various normalizations to make that somewhat seamless.
However, once "cloned-mac-address" property is set, setting any value of
"wifi.mac-address-randomization" has no effect, as it gets normalized
away by libnm. This is a sensible thing to do, in most cases to best
handle the deprecation/aliasing.
For nmcli, if the user sets "wifi.mac-address-randomization", it really
means to also reset the "cloned-mac-address". Thus nmcli needs to do
extra work to get this right.
This patch add support to HSR/PRP interface. Please notice that PRP
driver is represented as HSR too. They are different drivers but on
kernel they are integrated together.
HSR/PRP is a network protocol standard for Ethernet that provides
seamless failover against failure of any network component. It intends
to be transparent to the application. These protocols are useful for
applications that request high availability and short switchover time
e.g electrical substation or high power inverters.
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/1791
Add a new "stable-ssid" mode that generates the MAC address based on the
Wi-Fi's SSID.
Note that this gives the same MAC address as setting
connection.stable-id="${NETWORK_SSID}"
wifi.cloned-mac-address="stable"
The difference is that changing the stable ID of a profile also affects
"ipv6.addr-gen-mode=stable-privacy" and other settings.
For Wi-Fi profiles, this will encode the SSID in the stable-id.
For other profiles, this encodes the connection UUID (but the SSID and
the UUID will always result in distinct stable IDs).
Also escape the SSID, so that the generated stable-id is always valid
UTF-8.
Some Applications require to explicitly enable or disable EEE.
Therefore introduce EEE (Energy Efficient Ethernet) support with:
* ethtool.eee on/off
Unit test case included.
Signed-off-by: Johannes Zink <j.zink@pengutronix.de>
ethtool "channels" parameters can be used to configure multiple queues
for a NIC, which helps to improve performances. Until now, users had
to use dispatcher scripts to change those parameters. Introduce native
support in NetworkManager by adding the following properties:
- ethtool.channels-rx
- ethtool.channels-tx
- ethtool.channels-other
- ethtool.channels-combined
Convert the open-coded conditions to a switch/case so that the
compilation will fail if a new ethtool type is added and is not
handled in various places.
The get_gtype field in property_typ_data is intended to specify an enum
type for properties that are really defined as (u)int in the NMSetting
class. Specifying get_gtype for properties that are already defined as
enum in the NMSetting class is rejected as a runtime error. However, the
error message doesn't explain the reason. Put a code comment explaining
the reason.
Explaining it in a comment is actually enough because:
- The error is a runtime assertion that indicates a programming error
- The assertion is checked any time that the property is read or
written, so it should always be detected at developing time when doing
changes to the property.
Anyway, the code that did this checks was very difficult to read, so
let's take the opportunity to refactor it, with no functional changes.
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/1728
Some targets related to documentation generation had missing
dependencies, like xsl templates or the python generator. If these files
are changed, their output changes too, but as they were not listed as
dependencies (custom_target's input), meson wasn't aware.
In Makefile.am they already were correctly listed as dependencies.
Gtkdoc comments are used, among other things, to generate the various
nm-setting-* manual pages. When a constant is referenced in a gtkdoc
comment (i.e. `%NM_IP_TUNNEL_MODE_IPIP`) it is expanded to show the C name
and the value (i.e. `NM_IP_TUNNEL_MODE_IPIP (1)`). To generate the
nm-setting-* manual pages, we don't use gtkdoc, but we process this data
with the custom script tools/generate-docs-nm-settings-docs-gir.py.
This script was expanding the constants in the same way than gtkdoc.
Showing the constants in that way in nm-setting-* manual pages makes
little sense, because users are not going to use the C identifiers.
Let's show them with a more appropriate format.
Additionally, the different nm-setting-* pages might require different
formats than the other. For example, for nm-setting-nmcli a format like
`"ipip" (1)` is prefered, but for nm-setting-dbus it's better
`1 (ipip)`. Let's generate different nm-settings-docs-gir-*.xml files for
nmcli, dbus, keyfile and ifcfg-rh, using the right format for each one.
If there are properties that accept special values apart from the
normally accepted values, or any of those values has an special meaning,
it can be shown as "Special value", indicating the nicknames and numbers
that can be used to select it.
Show a new field called "Valid values" in those properties that only
accept a limited set of values, like enums, ints with a valid range of
values, etc.
As there is some complex logic behind getting this information, this
logic has been put in nm-meta-setting-desc and nm-enum-utils so they can
be re-used, avoiding duplicity and errors. Some refactor has been done
in nm-meta-setting-desc in this direction, too.
Instead of deducing the type from the GLib's types, use the properties'
metadata available in nm-meta-setting-desc.c which is the most accurate
representation of what the expected input from the user is.
Show all valid properties for ip-tunnel.mode, not only 2 examples.
Show constants as values suitable for user input in nmcli. That means
showing, for example, "ipip (1)" instead of "IP_TUNNEL_MODE_IPIP (1)".
Infiniband profiles can have a p-key set. Both in kernel API
("create_child" sysctl) and in NetworkManager API, that key can range
from 0x0001 to 0xFFFF (0x8000 excluded). NetworkManager does not support
renaming the interface, so kernel always assigns the interface name
"$PHYSDEV.$PKEY_ID" (with $PKEY_ID as 4 character hex digits).
Note that the highest bit in the p-key (0x8000) is the full-membership
flag. Internally, kernel only supports full-membership so when we create
for example "ib0.00c1" and "ib0.80c1" interfaces, their actually used
p-key is in both cases 0x80c1 and you can see it with `ip -d link`.
Nonetheless, kernel and NetworkManager allow to configure the p-key
without the highest bit set, and the result differs in the interface
name.
Note that initscripts' ifup-ib0 would always internally coerce the
PKEY_ID variable to have the high bit set ([1]). It also would require
that the `DEVICE=` variable is specified and matches the expected
interface name. So both these configurations are identical and valid:
DEVICE=ib0.80c1
PHYSDEV=ib0
PKEY_ID=0x80c1
and
DEVICE=ib0.80c1
PHYSDEV=ib0
PKEY_ID=0x00c1
Historically, NetworkManager would also implement the same restrictions
([2], [3], [4]). That meant, not all valid NetworkManager infiniband
profiles could be expressed as ifcfg file. For example, NetworkManager
allows to have "connection.interface-name" (`DEVICE=`) unset (which
ifup-ib and ifcfg reader did not allow). Also, NetworkManager would
allow configuring a "infiniband.p-key" without full membership flag, and
the reader would mangle that.
This caused various problems to the point that when you configure an
infiniband.p-key with a non-full-membership key, the ifcfg-rh written by
NetworkManager was invalid. Either, you could leave
"connection.interface-name" unset, but then the reader would complain
about missing `DEVICE=`. Or, we could write `DEVICE=ib0.00c1;
PKEY_ID=0x00c1`, which was invalid as we expected `DEVICE=ib0.80c1`.
This was addressed by rhbz 2122703 ([5]). The fix was to
- not require a `DEVICE=` ([6]).
- don't mangle the `PKEY_ID=` in the reader ([7]).
which happened in 1.41.2 and 1.40.2 (rhel-8.8).
With this change, we could persist any valid infiniband profile to ifcfg
format. We also could read back any valid ifcfg file that NetworkManager
would have written in the past (note that it could not write valid ifcfg
files previously, if the p-key didn't have the full-membership key set).
The problem is, that users were used to edit ifcfg files by hand, and
users would have files with:
DEVICE=ib0.80c1
PHYSDEV=ib0
PKEY_ID=0x00c1
This files had worked before, but now failed to verify as we would
expect `DEVICE=ib0.00c1`. Also, there was a change in behavior that
PKEY_ID is now interpreted without the high bit set. This is reported as
rhbz 2209164 ([8]).
We will do several things to fix that:
1) we now normalize the "connection.interface-name" to be valid. It was
not useful to set it anyway, as it was redundant. Complaining about a
redundant setting, which makes little sense to configure, is not useful.
This is done by [9].
2) we now again treat PKEY_ID= as if it had 0x8000 flag set. This was done by
[10].
With step 1) and 2), we are able to read any existing ifcfg files out
there in the way we did before 1.41.2.
There is however one piece missing. When we now create a profile using
nmcli/libnm/D-Bus, which has a non-full-membership p-key, then the
profile gets mangled in the process.
If the user uses NetworkManager API to configure an interface and
chooses a non-full-membership p-key, then this should work the same as
with keyfile plugin (or on rhel-9, where keyfile is the default). Note
that before 1.41.2 it didn't work at all, when the user used ifcfg-rh
backend. Likely(?) there are no users who rely on creating such a profile
with nmcli/libnm/D-Bus and expect to automatically have the p-key
normalized. That didn't work before 1.41.2 and didn't behave that way
between 1.41.2 and now.
This patch fixes that by introducing a new key PKEY_ID_NM= for holding
the real p-key. Now ifcfg backend is consistent with handling infiniband
profiles, and old, hand-written ifcfg files still work as before.
There is of course change in behavior, that ifcfg files between 1.41.2
and now were interpreted differently. But that is bug 2209164 ([8]) and
what we fix here.
For now strong reasons, we keep writing the PKEY_ID to file too. It's
redundant, but that is what a human might expect there.
[1] 05333c3602/f/rdma.ifup-ib (_75)
[2] https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/blob/1.40.0/src/core/settings/plugins/ifcfg-rh/nms-ifcfg-rh-reader.c#L5386
[3] cb5606cf1c (a7a78fccb2c8c945fd09038656ae734c1b0349ab_3493_3532)
[4] cb5606cf1c (a7a78fccb2c8c945fd09038656ae734c1b0349ab_3493_3506)
[5] https://bugzilla.redhat.com/show_bug.cgi?id=2122703
[6] 4c32dd9d25
[7] a4fe16a426
[8] https://bugzilla.redhat.com/show_bug.cgi?id=2209164
[9] 4610fd67e6
[10] f8e5e07355
It's obviously a change in behavior. Now accept backslash for escaping
the whitespace+comma separators when setting "connection.secondaries".
Before:
$ nmcli --offline connection add type ethernet con-name x connection.secondaries 'a b'
Error: failed to modify connection.secondaries: the value 'a' is not a valid UUID.
$ nmcli --offline connection add type ethernet con-name x connection.secondaries 'a\ b'
Error: failed to modify connection.secondaries: the value 'a\' is not a valid UUID.
After:
$ nmcli --offline connection add type ethernet con-name x connection.secondaries 'a\ b'
Error: failed to modify connection.secondaries: the value 'a b' is not a valid UUID.
https://bugzilla.redhat.com/show_bug.cgi?id=2177209
