Blame SOURCES/0066-efinet-add-filter-for-the-first-exclusive-reopen-of-.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: RHEL Ninjas <example@example.com>
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Date: Fri, 25 Sep 2015 16:24:23 +0900
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Subject: [PATCH] efinet: add filter for the first exclusive reopen of SNP
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---
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 grub-core/net/drivers/efi/efinet.c | 39 ++++++++++++++++++++++++++++++++++++++
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 1 file changed, 39 insertions(+)
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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 5388f952ba9..d15a799f29a 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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@@ -383,6 +383,45 @@ grub_efi_net_config_real (grub_efi_handle_t hnd, char **device,
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 				    &pxe_mode->dhcp_ack,
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 				    sizeof (pxe_mode->dhcp_ack),
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 				    1, device, path);
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+    net = grub_efi_open_protocol (card->efi_handle, &net_io_guid,
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+				  GRUB_EFI_OPEN_PROTOCOL_BY_EXCLUSIVE);
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+    if (net) {
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+      if (net->mode->state == GRUB_EFI_NETWORK_STOPPED
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+	  && efi_call_1 (net->start, net) != GRUB_EFI_SUCCESS)
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+	continue;
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+
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+      if (net->mode->state == GRUB_EFI_NETWORK_STOPPED)
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+	continue;
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+
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+      if (net->mode->state == GRUB_EFI_NETWORK_STARTED
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+	  && efi_call_3 (net->initialize, net, 0, 0) != GRUB_EFI_SUCCESS)
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+	continue;
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+
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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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+      card->efi_net = net;
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+    }
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     return;
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   }
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 }