File 0001-efinet-Skip-virtual-VLAN-devices-during-ca... of Package grub2

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File 0001-efinet-Skip-virtual-VLAN-devices-during-card-enumera.patch of Package grub2 (Revision e3a1a18fc2a5557e32268bcb89c66262)

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From 8b9234c7e482edd49a9b3377da8e48fbd54aab28 Mon Sep 17 00:00:00 2001
From: Michael Chang <mchang@suse.com>
Date: Tue, 24 Sep 2024 18:59:34 +0800
Subject: [PATCH] efinet: Skip virtual VLAN devices during card enumeration

Similar to the fix in commit "c52ae4057 efinet: skip virtual IPv4 and
IPv6 devices during card enumeration", the UEFI PXE driver creates
additional VLAN child devices when a VLAN ID is configured on a network
interface associated with a physical NIC. These virtual VLAN devices
must be skipped during card enumeration to ensure that the subsequent
SNP exclusive open operation targets the correct physical card
instances, otherwise packet transfer would fail.

Example device path with VLAN nodes:

/MAC(123456789ABC,0x1)/Vlan(20)/IPv4(0.0.0.0,0x0,DHCP,0.0.0.0,0.0.0.0,0.0.0.0)

Signed-Off-by: Michael Chang <mchang@suse.com>
---
 grub-core/net/drivers/efi/efinet.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/grub-core/net/drivers/efi/efinet.c b/grub-core/net/drivers/efi/efinet.c
index 720b5d0e1..3d0bf34fa 100644
--- a/grub-core/net/drivers/efi/efinet.c
+++ b/grub-core/net/drivers/efi/efinet.c
@@ -280,7 +280,8 @@ grub_efinet_findcards (void)
 	      || GRUB_EFI_DEVICE_PATH_SUBTYPE (child) == GRUB_EFI_IPV6_DEVICE_PATH_SUBTYPE)
 	  && parent
 	  && GRUB_EFI_DEVICE_PATH_TYPE (parent) == GRUB_EFI_MESSAGING_DEVICE_PATH_TYPE
-	  && GRUB_EFI_DEVICE_PATH_SUBTYPE (parent) == GRUB_EFI_MAC_ADDRESS_DEVICE_PATH_SUBTYPE)
+	  && (GRUB_EFI_DEVICE_PATH_SUBTYPE (parent) == GRUB_EFI_MAC_ADDRESS_DEVICE_PATH_SUBTYPE
+	      || GRUB_EFI_DEVICE_PATH_SUBTYPE (parent) == GRUB_EFI_VLAN_DEVICE_PATH_SUBTYPE))
 	continue;
 
       net = grub_efi_open_protocol (*handle, &net_io_guid,
@@ -810,6 +811,15 @@ grub_efi_net_config_real (grub_efi_handle_t hnd, char **device,
 	dup_ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
 	dup_ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
 	dup_ldp->length = sizeof (*dup_ldp);
+
+	dup_ldp = grub_efi_find_last_device_path (dup_dp);
+	if (GRUB_EFI_DEVICE_PATH_SUBTYPE (dup_ldp) == GRUB_EFI_VLAN_DEVICE_PATH_SUBTYPE)
+	  {
+	    dup_ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
+	    dup_ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
+	    dup_ldp->length = sizeof (*dup_ldp);
+	  }
+
 	match = grub_efi_compare_device_paths (dup_dp, cdp) == 0;
 	grub_free (dup_dp);
 	if (!match)
-- 
2.46.1

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File 0001-efinet-Skip-virtual-VLAN-devices-during-card-enumera.patch of Package grub2 (Revision e3a1a18fc2a5557e32268bcb89c66262)

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