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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Michael Chang <mchang@suse.com>
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Date: Sun, 10 Jul 2016 23:46:31 +0800
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Subject: [PATCH] efinet: Setting network from UEFI device path
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The PXE Base Code protocol used to obtain cached PXE DHCPACK packet is no
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longer provided for HTTP Boot. Instead, we have to get the HTTP boot
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information from the device path nodes defined in following UEFI Specification
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sections.
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9.3.5.12 IPv4 Device Path
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9.3.5.13 IPv6 Device Path
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9.3.5.23 Uniform Resource Identifiers (URI) Device Path
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This patch basically does:
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include/grub/efi/api.h:
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Add new structure of Uniform Resource Identifiers (URI) Device Path
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grub-core/net/drivers/efi/efinet.c:
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Check if PXE Base Code is available, if not it will try to obtain the netboot
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information from the device path where the image booted from. The DHCPACK
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packet is recoverd from the information in device patch and feed into the same
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DHCP packet processing functions to ensure the network interface is setting up
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the same way it used to be.
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Signed-off-by: Michael Chang <mchang@suse.com>
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Signed-off-by: Ken Lin <ken.lin@hpe.com>
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---
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grub-core/net/drivers/efi/efinet.c | 14 +++++---------
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1 file changed, 5 insertions(+), 9 deletions(-)
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diff --git a/grub-core/net/drivers/efi/efinet.c b/grub-core/net/drivers/efi/efinet.c
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index 3bea6221745..a161e7a5f26 100644
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--- a/grub-core/net/drivers/efi/efinet.c
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+++ b/grub-core/net/drivers/efi/efinet.c
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@@ -475,9 +475,6 @@ grub_efinet_create_dhcp_ack_from_device_path (grub_efi_device_path_t *dp, int *u
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grub_err_t err;
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ddp = grub_efi_duplicate_device_path (dp);
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- if (!ddp)
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- return NULL;
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-
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ldp = grub_efi_find_last_device_path (ddp);
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if (GRUB_EFI_DEVICE_PATH_TYPE (ldp) != GRUB_EFI_MESSAGING_DEVICE_PATH_TYPE
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@@ -754,7 +751,7 @@ grub_efi_net_config_real (grub_efi_handle_t hnd, char **device,
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{
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grub_efi_device_path_t *cdp;
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struct grub_efi_pxe *pxe;
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- struct grub_efi_pxe_mode *pxe_mode;
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+ struct grub_efi_pxe_mode *pxe_mode = NULL;
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grub_uint8_t *packet_buf;
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grub_size_t packet_bufsz ;
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int ipv6;
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@@ -841,11 +838,10 @@ grub_efi_net_config_real (grub_efi_handle_t hnd, char **device,
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if (ipv6)
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{
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grub_dprintf ("efinet", "using ipv6 and dhcpv6\n");
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- grub_dprintf ("efinet", "dhcp_ack_received: %s%s\n",
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- pxe_mode->dhcp_ack_received ? "yes" : "no",
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- pxe_mode->dhcp_ack_received ? "" : " cannot continue");
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- if (!pxe_mode->dhcp_ack_received)
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- continue;
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+ if (pxe_mode)
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+ grub_dprintf ("efinet", "dhcp_ack_received: %s%s\n",
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+ pxe_mode->dhcp_ack_received ? "yes" : "no",
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+ pxe_mode->dhcp_ack_received ? "" : " cannot continue");
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grub_net_configure_by_dhcpv6_reply (card->name, card, 0,
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(struct grub_net_dhcp6_packet *)
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