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From dcc59dffa5116bf96618065cd60742cb660224b8 Mon Sep 17 00:00:00 2001
From: Lukas Nykryn <lnykryn@redhat.com>
Date: Fri, 22 Sep 2023 13:28:02 +0200
Subject: [PATCH] netif-naming-scheme: let's also include rhel8 schemes
With this patch user in rhel9 can also pick a scheme from rhel8.
This could be useful on in-place upgrades.
rhel-only
Resolves: RHEL-7026
---
man/systemd.net-naming-scheme.xml | 88 +++++++++++++++++++++++++++++++
src/shared/netif-naming-scheme.c | 10 ++++
src/shared/netif-naming-scheme.h | 12 +++++
3 files changed, 110 insertions(+)
diff --git a/man/systemd.net-naming-scheme.xml b/man/systemd.net-naming-scheme.xml
index ade4e27e31..c6ab86906a 100644
--- a/man/systemd.net-naming-scheme.xml
+++ b/man/systemd.net-naming-scheme.xml
@@ -459,6 +459,94 @@
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><constant>rhel-8.0</constant></term>
+
+ <listitem><para>Naming was changed for virtual network interfaces created with SR-IOV and NPAR and
+ for devices where the PCI network controller device does not have a slot number associated.</para>
+
+ <para>SR-IOV virtual devices are named based on the name of the parent interface, with a suffix of
+ <literal>v<replaceable>port</replaceable></literal>, where <replaceable>port</replaceable> is the
+ virtual device number. Previously those virtual devices were named as if completely independent.
+ </para>
+
+ <para>The ninth and later NPAR virtual devices are named following the scheme used for the first
+ eight NPAR partitions. Previously those devices were not renamed and the kernel default
+ ("eth<replaceable>N</replaceable>") was used.</para>
+
+ <para>Names are also generated for PCI devices where the PCI network controller device does not
+ have an associated slot number itself, but one of its parents does. Previously those devices were
+ not renamed and the kernel default was used.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>rhel-8.1</constant></term>
+
+ <para>Same as naming scheme <constant>rhel-8.0</constant>.</para>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>rhel-8.2</constant></term>
+
+ <para>Same as naming scheme <constant>rhel-8.0</constant>.</para>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>rhel-8.3</constant></term>
+
+ <para>Same as naming scheme <constant>rhel-8.0</constant>.</para>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>rhel-8.4</constant></term>
+
+ <listitem><para>If the PCI slot is assocated with PCI bridge and that has multiple child network
+ controllers then all of them might derive the same value of <varname>ID_NET_NAME_SLOT</varname>
+ property. That could cause naming conflict if the property is selected as a device name. Now, we detect the
+ situation, slot - bridge relation, and we don't produce the <varname>ID_NET_NAME_SLOT</varname> property to
+ avoid possible naming conflict.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>rhel-8.5</constant></term>
+
+ <para>Same as naming scheme <constant>rhel-8.4</constant>.</para>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>rhel-8.6</constant></term>
+
+ <para>Same as naming scheme <constant>rhel-8.4</constant>.</para>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>rhel-8.7</constant></term>
+
+ <listitem><para>PCI hotplug slot names for the s390 PCI driver are a hexadecimal representation
+ of the <filename>function_id</filename> device attribute. This attribute is now used to build the
+ <varname>ID_NET_NAME_SLOT</varname>. Before that, all slot names were parsed as decimal
+ numbers, which could either result in an incorrect value of the <varname>ID_NET_NAME_SLOT</varname>
+ property or none at all.</para>
+
+ <para>Some firmware and hypervisor implementations report unreasonable high numbers for the onboard
+ index. To prevent the generation of bogus onbard interface names, index numbers greater than 16381
+ (2^14-1) were ignored. For s390 PCI devices index values up to 65535 (2^16-1) are valid. To account
+ for that, the limit is increased to now 65535.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>rhel-8.8</constant></term>
+
+ <para>Same as naming scheme <constant>rhel-8.7</constant>.</para>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>rhel-8.9</constant></term>
+
+ <para>Same as naming scheme <constant>rhel-8.7</constant>.</para>
+ </varlistentry>
+
<varlistentry>
<term><constant>rhel-9.0</constant></term>
diff --git a/src/shared/netif-naming-scheme.c b/src/shared/netif-naming-scheme.c
index 0f50533279..9cfa5ca8e6 100644
--- a/src/shared/netif-naming-scheme.c
+++ b/src/shared/netif-naming-scheme.c
@@ -25,6 +25,16 @@ static const NamingScheme naming_schemes[] = {
{ "v250", NAMING_V250 },
{ "v251", NAMING_V251 },
{ "v252", NAMING_V252 },
+ { "rhel-8.0", NAMING_RHEL_8_0 },
+ { "rhel-8.1", NAMING_RHEL_8_1 },
+ { "rhel-8.2", NAMING_RHEL_8_2 },
+ { "rhel-8.3", NAMING_RHEL_8_3 },
+ { "rhel-8.4", NAMING_RHEL_8_4 },
+ { "rhel-8.5", NAMING_RHEL_8_5 },
+ { "rhel-8.6", NAMING_RHEL_8_6 },
+ { "rhel-8.7", NAMING_RHEL_8_7 },
+ { "rhel-8.8", NAMING_RHEL_8_8 },
+ { "rhel-8.9", NAMING_RHEL_8_9 },
{ "rhel-9.0", NAMING_RHEL_9_0 },
{ "rhel-9.1", NAMING_RHEL_9_1 },
{ "rhel-9.2", NAMING_RHEL_9_2 },
diff --git a/src/shared/netif-naming-scheme.h b/src/shared/netif-naming-scheme.h
index fb3c8eb9b3..ed45536f65 100644
--- a/src/shared/netif-naming-scheme.h
+++ b/src/shared/netif-naming-scheme.h
@@ -52,6 +52,18 @@ typedef enum NamingSchemeFlags {
NAMING_V250 = NAMING_V249 | NAMING_XEN_VIF,
NAMING_V251 = NAMING_V250 | NAMING_BRIDGE_MULTIFUNCTION_SLOT,
NAMING_V252 = NAMING_V251 | NAMING_DEVICETREE_ALIASES,
+
+ NAMING_RHEL_8_0 = NAMING_V239,
+ NAMING_RHEL_8_1 = NAMING_V239,
+ NAMING_RHEL_8_2 = NAMING_V239,
+ NAMING_RHEL_8_3 = NAMING_V239,
+ NAMING_RHEL_8_4 = NAMING_V239 | NAMING_BRIDGE_NO_SLOT,
+ NAMING_RHEL_8_5 = NAMING_RHEL_8_4,
+ NAMING_RHEL_8_6 = NAMING_RHEL_8_4,
+ NAMING_RHEL_8_7 = NAMING_RHEL_8_4 | NAMING_SLOT_FUNCTION_ID | NAMING_16BIT_INDEX,
+ NAMING_RHEL_8_8 = NAMING_RHEL_8_7,
+ NAMING_RHEL_8_9 = NAMING_RHEL_8_7,
+
NAMING_RHEL_9_0 = NAMING_V250 | NAMING_BRIDGE_MULTIFUNCTION_SLOT,
NAMING_RHEL_9_1 = NAMING_RHEL_9_0,
NAMING_RHEL_9_2 = NAMING_RHEL_9_0,
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