There are 3 implementations of a GUID in GRUB. Replace them with
a common one, placed in types.h.
It uses the "packed" flavor of the GUID structs, the alignment attribute
is dropped, since it is not required.
Signed-off-by: Oliver Steffen <osteffen@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Now that GCC can generate function calls using the correct calling
convention for us, we can stop using the efi_call_XX() wrappers, and
just dereference the function pointers directly.
This avoids the untyped variadic wrapper routines, which means better
type checking for the method calls.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
When GRUB runs on top of EFI firmware, it only has access to block and
network device abstractions exposed by the firmware, and it is up to the
firmware to quiesce the underlying hardware when exiting boot services
and handing over to the OS.
This is especially important for network devices, to prevent incoming
packets from being DMA'd straight into memory after the OS has taken
over but before it has managed to reconfigure the network hardware.
GRUB handles this by means of the grub_net_fini_hw() preboot hook, which
is executed before calling into the booted image. This means that all
network devices disappear or become inoperable before the EFI stub
executes on EFI targeted builds. This is problematic as it prevents the
EFI stub from calling back into GRUB provided protocols such as
LoadFile2 for the initrd, which we will provide in a subsequent patch.
So add a flag that indicates to the network core that EFI network
devices should not be closed when grub_net_fini_hw() is called.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This patch handles automatic configuration of VLAN when booting from PXE
on UEFI hardware.
Signed-off-by: Chad Kimes <chkimes@github.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Create a library function for CloseProtocol() and use it for the SNP driver.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
In the context of the implementation of the EFI_LOAD_FILE2_PROTOCOL for
the initial ramdisk it was observed that opening the SNP protocol failed.
https://lists.gnu.org/archive/html/grub-devel/2021-10/msg00020.html
This is due to an incorrect call to CloseProtocol().
The first parameter of CloseProtocol() is the handle, not the interface.
We call OpenProtocol() with ControllerHandle == NULL. Hence we must also
call CloseProtcol() with ControllerHandel == NULL.
Each call of OpenProtocol() for the same network card handle is expected to
return the same interface pointer. If we want to close the protocol which
we opened non-exclusively when searching for a card, we have to do this
before opening the protocol exclusively.
As there is no guarantee that we successfully open the protocol add checks
in the transmit and receive functions.
Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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 47b2bee3ef0ea60fc3f5bfc37f3784e559385297
and 8d3c4544ffdd0289a4b0bdeb0cdc6355f801a4b3. 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.
