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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Andrei Borzenkov <arvidjaar@gmail.com>
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Date: Tue, 16 Jun 2015 19:52:45 +0300
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Subject: [PATCH] efinet: enable hardware filters when opening interface
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Exclusive open on SNP will close all existing protocol instances which
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may disable all receive filters on interface. Reinstall them after we
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opened protocol exclusively.
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Also follow UEFI specification recommendation and stop interfaces when
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closing them:
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Unexpected system errors, reboots and hangs can occur if an OS is loaded
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and the network devices are not Shutdown() and Stopped().
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Also by: Mark Salter <msalter@redhat.com>
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Closes: 45204
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---
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grub-core/net/drivers/efi/efinet.c | 25 +++++++++++++++++++++++++
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include/grub/efi/api.h | 20 +++++++++++++++++---
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2 files changed, 42 insertions(+), 3 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 6a1dd1f9dff..7b8c4a59d10 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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@@ -168,6 +168,29 @@ open_card (struct grub_net_card *dev)
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return grub_error (GRUB_ERR_NET_NO_CARD, "%s: net initialize failed",
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dev->name);
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+ /* Enable hardware receive filters if driver declares support for it.
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+ We need unicast and broadcast and additionaly all nodes and
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+ solicited multicast for IPv6. Solicited multicast is per-IPv6
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+ address and we currently do not have API to do it so simply
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+ try to enable receive of all multicast packets or evertyhing in
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+ the worst case (i386 PXE driver always enables promiscuous too).
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+
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+ This does trust firmware to do what it claims to do.
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+ */
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+ if (net->mode->receive_filter_mask)
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+ {
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+ grub_uint32_t filters = GRUB_EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
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+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST |
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+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST;
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+
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+ filters &= net->mode->receive_filter_mask;
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+ if (!(filters & GRUB_EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST))
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+ filters |= (net->mode->receive_filter_mask &
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+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS);
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+
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+ efi_call_6 (net->receive_filters, net, filters, 0, 0, 0, NULL);
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+ }
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+
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efi_call_4 (grub_efi_system_table->boot_services->close_protocol,
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dev->efi_net, &net_io_guid,
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grub_efi_image_handle, dev->efi_handle);
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@@ -181,6 +204,8 @@ open_card (struct grub_net_card *dev)
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static void
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close_card (struct grub_net_card *dev)
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{
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+ efi_call_1 (dev->efi_net->shutdown, dev->efi_net);
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+ efi_call_1 (dev->efi_net->stop, dev->efi_net);
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efi_call_4 (grub_efi_system_table->boot_services->close_protocol,
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dev->efi_net, &net_io_guid,
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grub_efi_image_handle, dev->efi_handle);
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diff --git a/include/grub/efi/api.h b/include/grub/efi/api.h
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index 142340372e1..029ee92f5d0 100644
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--- a/include/grub/efi/api.h
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+++ b/include/grub/efi/api.h
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@@ -1564,17 +1564,31 @@ enum
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GRUB_EFI_NETWORK_INITIALIZED,
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};
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+enum
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+ {
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+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_UNICAST = 0x01,
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+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST = 0x02,
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+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST = 0x04,
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+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS = 0x08,
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+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST = 0x10,
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+ };
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+
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struct grub_efi_simple_network
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{
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grub_uint64_t revision;
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grub_efi_status_t (*start) (struct grub_efi_simple_network *this);
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- void (*stop) (void);
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+ grub_efi_status_t (*stop) (struct grub_efi_simple_network *this);
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grub_efi_status_t (*initialize) (struct grub_efi_simple_network *this,
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grub_efi_uintn_t extra_rx,
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grub_efi_uintn_t extra_tx);
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void (*reset) (void);
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- void (*shutdown) (void);
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- void (*receive_filters) (void);
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+ grub_efi_status_t (*shutdown) (struct grub_efi_simple_network *this);
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+ grub_efi_status_t (*receive_filters) (struct grub_efi_simple_network *this,
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+ grub_uint32_t enable,
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+ grub_uint32_t disable,
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+ grub_efi_boolean_t reset_mcast_filter,
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+ grub_efi_uintn_t mcast_filter_count,
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+ grub_efi_mac_address_t *mcast_filter);
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void (*station_address) (void);
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void (*statistics) (void);
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void (*mcastiptomac) (void);
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