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systemd/1037-Revert-udev-builtin-net_id-use-firmware_node-sun-for.patch
Lukas Nykryn e17b63e7f8 systemd-252-44 
Resolves: RHEL-50103,RHEL-50651
2024-08-22 16:56:09 +02:00

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From ae92c09f0ddfea2ff6042e152eec9af86013da38 Mon Sep 17 00:00:00 2001
From: Lukas Nykryn <lnykryn@redhat.com>
Date: Thu, 22 Aug 2024 14:24:42 +0200
Subject: [PATCH] Revert "udev-builtin-net_id: use firmware_node/sun for
ID_NET_NAME_SLOT"
This reverts commit 7af151ca282d506a8e409a68b656f6d1cd2f13fb.
It seems that virtio devices always have "0" in
the firmware_node/sun. And because of that, udev will
always name the device ens0, which leads to collisions.
So let's disable it for now.
rhel-only: policy
Reverts: RHEL-50103
---
man/systemd.net-naming-scheme.xml | 5 +--
src/shared/netif-naming-scheme.h | 3 +-
src/udev/udev-builtin-net_id.c | 66 ++++---------------------------
3 files changed, 10 insertions(+), 64 deletions(-)
diff --git a/man/systemd.net-naming-scheme.xml b/man/systemd.net-naming-scheme.xml
index c9a7e1e493..83293e5636 100644
--- a/man/systemd.net-naming-scheme.xml
+++ b/man/systemd.net-naming-scheme.xml
@@ -510,10 +510,9 @@
to distinguish between devices. However, name conflict can occur if these devices are not
children of the same PCI bridge, e.g. there are multiple PCI bridges in the same slot.
</para>
-
- <para>PCI slot number is now read from <constant>firmware_node/sun</constant> sysfs file.</para>
</listitem>
</varlistentry>
+
</variablelist>
<para>By default <constant>rhel-9.0</constant> is used.</para>
@@ -667,7 +666,7 @@ ID_NET_NAME_ONBOARD_LABEL=Ethernet Port 1
</example>
<example>
- <title>PCI Ethernet card in slot with firmware index number</title>
+ <title>PCI Ethernet card in hotplug slot with firmware index number</title>
<programlisting># /sys/devices/pci0000:00/0000:00:1c.3/0000:05:00.0/net/ens1
ID_NET_NAME_MAC=enx000000000466
diff --git a/src/shared/netif-naming-scheme.h b/src/shared/netif-naming-scheme.h
index b1ac2e4320..5bc071f8db 100644
--- a/src/shared/netif-naming-scheme.h
+++ b/src/shared/netif-naming-scheme.h
@@ -42,7 +42,6 @@ typedef enum NamingSchemeFlags {
* This is disabled since rhel-9.5, as it seems not to work at least for some setups. See upstream issue #28929. */
NAMING_DEVICETREE_ALIASES = 1 << 15, /* Generate names from devicetree aliases */
NAMING_SR_IOV_R = 1 << 17, /* Use "r" suffix for SR-IOV VF representors */
- NAMING_FIRMWARE_NODE_SUN = 1 << 18, /* Use firmware_node/sun to get PCI slot number */
/* And now the masks that combine the features above */
NAMING_V238 = 0,
@@ -74,7 +73,7 @@ typedef enum NamingSchemeFlags {
NAMING_RHEL_9_2 = NAMING_RHEL_9_0,
NAMING_RHEL_9_3 = NAMING_RHEL_9_0 | NAMING_SR_IOV_R,
NAMING_RHEL_9_4 = NAMING_RHEL_9_3,
- NAMING_RHEL_9_5 = (NAMING_RHEL_9_4 & ~NAMING_BRIDGE_MULTIFUNCTION_SLOT) | NAMING_FIRMWARE_NODE_SUN,
+ NAMING_RHEL_9_5 = NAMING_RHEL_9_4 & ~NAMING_BRIDGE_MULTIFUNCTION_SLOT,
EXTRA_NET_NAMING_SCHEMES
diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c
index 291fb4ba36..16c9971876 100644
--- a/src/udev/udev-builtin-net_id.c
+++ b/src/udev/udev-builtin-net_id.c
@@ -442,51 +442,6 @@ static int pci_get_hotplug_slot(sd_device *dev, uint32_t *ret) {
return -ENOENT;
}
-static int get_device_firmware_node_sun(sd_device *dev, uint32_t *ret) {
- const char *attr;
- int r;
-
- assert(dev);
- assert(ret);
-
- r = device_get_sysattr_value_filtered(dev, "firmware_node/sun", &attr);
- if (r < 0)
- return log_device_debug_errno(dev, r, "Failed to read firmware_node/sun, ignoring: %m");
-
- r = safe_atou32(attr, ret);
- if (r < 0)
- return log_device_warning_errno(dev, r, "Failed to parse firmware_node/sun '%s', ignoring: %m", attr);
-
- return 0;
-}
-
-static int pci_get_slot_from_firmware_node_sun(sd_device *dev, uint32_t *ret) {
- int r;
- sd_device *slot_dev;
-
- assert(dev);
- assert(ret);
-
- /* Try getting the ACPI _SUN for the device */
- if (get_device_firmware_node_sun(dev, ret) >= 0)
- return 0;
-
- r = sd_device_get_parent_with_subsystem_devtype(dev, "pci", NULL, &slot_dev);
- if (r < 0)
- return log_device_debug_errno(dev, r, "Failed to find pci parent, ignoring: %m");
-
- if (is_pci_bridge(slot_dev) && is_pci_multifunction(dev) <= 0)
- return log_device_debug_errno(dev, SYNTHETIC_ERRNO(ESTALE),
- "Not using slot information because the parent pcieport "
- "is a bridge and the PCI device is not multifunction.");
-
- /* Try getting the ACPI _SUN from the parent pcieport */
- if (get_device_firmware_node_sun(slot_dev, ret) >= 0)
- return 0;
-
- return -ENOENT;
-}
-
static int dev_pci_slot(sd_device *dev, const LinkInfo *info, NetNames *names) {
const char *sysname, *attr;
unsigned domain, bus, slot, func;
@@ -562,20 +517,13 @@ static int dev_pci_slot(sd_device *dev, const LinkInfo *info, NetNames *names) {
domain, bus, slot, func, strempty(info->phys_port_name), dev_port,
special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), empty_to_na(names->pci_path));
- if (naming_scheme_has(NAMING_FIRMWARE_NODE_SUN))
- r = pci_get_slot_from_firmware_node_sun(names->pcidev, &hotplug_slot);
- else
- r = -1;
- /* If we don't find a slot using firmware_node/sun, fallback to hotplug_slot */
- if (r < 0) {
- r = pci_get_hotplug_slot(names->pcidev, &hotplug_slot);
- if (r < 0)
- return r;
- if (r > 0)
- /* If the hotplug slot is found through the function ID, then drop the domain from the name.
- * See comments in parse_hotplug_slot_from_function_id(). */
- domain = 0;
- }
+ r = pci_get_hotplug_slot(names->pcidev, &hotplug_slot);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ /* If the hotplug slot is found through the function ID, then drop the domain from the name.
+ * See comments in parse_hotplug_slot_from_function_id(). */
+ domain = 0;
s = names->pci_slot;
l = sizeof(names->pci_slot);
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