In the URI device path node, any name rahter than address can be used for
looking up the resources so that DNS service become needed to get answer of the
name's address. Unfortunately the DNS is not defined in any of the device path
nodes so that we use the EFI_IP4_CONFIG2_PROTOCOL and EFI_IP6_CONFIG_PROTOCOL
to obtain it.
These two protcols are defined the sections of UEFI specification.
27.5 EFI IPv4 Configuration II Protocol
27.7 EFI IPv6 Configuration Protocol
include/grub/efi/api.h:
Add new structure and protocol UUID of EFI_IP4_CONFIG2_PROTOCOL and
EFI_IP6_CONFIG_PROTOCOL.
grub-core/net/drivers/efi/efinet.c:
Use the EFI_IP4_CONFIG2_PROTOCOL and EFI_IP6_CONFIG_PROTOCOL to obtain the list
of DNS server address for IPv4 and IPv6 respectively. The address of DNS
servers is structured into DHCPACK packet and feed into the same DHCP packet
processing functions to ensure the network interface is setting up the same way
it used to be.
Signed-off-by: Michael Chang <mchang@suse.com>
Signed-off-by: Ken Lin <ken.lin@hpe.com>
Patch-Name: efinet-set-dns-from-uefi-proto.patch
The PXE Base Code protocol used to obtain cached PXE DHCPACK packet is no
longer provided for HTTP Boot. Instead, we have to get the HTTP boot
information from the device path nodes defined in following UEFI Specification
sections.
9.3.5.12 IPv4 Device Path
9.3.5.13 IPv6 Device Path
9.3.5.23 Uniform Resource Identifiers (URI) Device Path
This patch basically does:
include/grub/efi/api.h:
Add new structure of Uniform Resource Identifiers (URI) Device Path
grub-core/net/drivers/efi/efinet.c:
Check if PXE Base Code is available, if not it will try to obtain the netboot
information from the device path where the image booted from. The DHCPACK
packet is recoverd from the information in device patch and feed into the same
DHCP packet processing functions to ensure the network interface is setting up
the same way it used to be.
Signed-off-by: Michael Chang <mchang@suse.com>
Signed-off-by: Ken Lin <ken.lin@hpe.com>
Patch-Name: efinet-set-network-from-uefi-devpath.patch
When grub2 image is booted from UEFI IPv6 PXE, the DHCPv6 Reply packet is
cached in firmware buffer which can be obtained by PXE Base Code protocol. The
network interface can be setup through the parameters in that obtained packet.
Signed-off-by: Michael Chang <mchang@suse.com>
Signed-off-by: Ken Lin <ken.lin@hpe.com>
Patch-Name: efinet-uefi-ipv6-pxe-support.patch
The EFI spec indicates that get_status() should return the address of the buffer
we passed into transmit to indicate the the buffer was transmitted. However we
have boxes where the firmware returns some arbitrary address instead, which
makes grub think that we've not sent anything. So since we have the SNP stuff
opened in exclusive mode just assume any non-NULL txbuf means that our transmit
occurred properly. This makes grub able to do its networking stuff properly on
our broken firmware. Thanks,
cc: Peter Jones <pjones@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Exclusive open on SNP will close all existing protocol instances which
may disable all receive filters on interface. Reinstall them after we
opened protocol exclusively.
Also follow UEFI specification recommendation and stop interfaces when
closing them:
Unexpected system errors, reboots and hangs can occur if an OS is loaded
and the network devices are not Shutdown() and Stopped().
Also by: Mark Salter <msalter@redhat.com>
Closes: 45204
EDK2 network stack is based on Managed Network Protocol which is layered
on top of Simple Management Protocol and does background polling. This
polling races with grub for received (and probably trasmitted) packets
which causes either serious slowdown or complete failure to load files.
Open SNP device exclusively. This destroys all child MNP instances and
stops background polling.
Exclusive open cannot be done when enumerating cards, as it would destroy
PXE information we need to autoconfigure interface; and it cannot be done
during autoconfiguration as we need to do it for non-PXE boot as well. So
move SNP open to card ->open method and add matching ->close to clean up.
Based on patch from Mark Salter <msalter@redhat.com>
Also-By: Mark Salter <msalter@redhat.com>
Closes: 41731
EDK2 PXE driver creates two child devices - IPv4 and IPv6 - with
bound SNP instance. This means we get three cards for every physical
adapter when enumerating. Not only is this confusing, this may result
in grub ignoring packets that come in via the "wrong" card.
Example of device hierarchy is
Ctrl[91] PciRoot(0x0)/Pci(0x3,0x0)
Ctrl[95] PciRoot(0x0)/Pci(0x3,0x0)/MAC(525400123456,0x1)
Ctrl[B4] PciRoot(0x0)/Pci(0x3,0x0)/MAC(525400123456,0x1)/IPv4(0.0.0.0)
Ctrl[BC] PciRoot(0x0)/Pci(0x3,0x0)/MAC(525400123456,0x1)/IPv6(0000:0000:0000:0000:0000:0000:0000:0000)
Skip PXE created virtual devices when enumerating cards. Make sure to
find real card when applying initial autoconfiguration during PXE boot,
this information is associated with one of child devices.
This reverts commits 47b2bee3ef
and 8d3c4544ff. It is not safe
to free allocated cards, dangling pointers main remain. Such
cleanup requires more changes in net core.
* include/grub/ieee1275/ieee1275.h (grub_ieee1275_flag): New enum values
GRUB_IEEE1275_FLAG_NO_OFNET_SUFFIX and
GRUB_IEEE1275_FLAG_VIRT_TO_REAL_BROKEN.
* grub-core/net/drivers/efi/efinet.c (grub_efinet_findcards): Use
txbufsize.
* grub-core/kern/ieee1275/cmain.c (grub_ieee1275_find_options): Use
compatible property to check for macs. Set
GRUB_IEEE1275_FLAG_NO_OFNET_SUFFIX and
GRUB_IEEE1275_FLAG_VIRT_TO_REAL_BROKEN on macs.
* grub-core/net/drivers/ieee1275/ofnet.c (card_open): Don't add suffix
if GRUB_IEEE1275_FLAG_NO_OFNET_SUFFIX is set.
(send_card_buffer): Use txbuf.
(grub_ofnet_findcards): Allocate txbuf. Simplify code flow and move
nested function out of the parent while on it.
* include/grub/net.h (grub_net_card_driver): Allow driver to modify
card. All users updated.
(grub_net_card): New members txbuf, rcvbuf, rcvbufsize and txbusy.
* grub-core/net/drivers/efi/efinet.c (send_card_buffer): Reuse buffer.
(get_card_packet): Likewise.
(grub_efinet_findcards): Init new fields.
