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Before taking any actions, check if an instance of the LoadFile2 exists already on the Linux initrd media GUID device path, and whether it was provided by this command. If so, abort, since no duplicate instances of the device path should exist. Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2564 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
53 lines
2.1 KiB
Plaintext
53 lines
2.1 KiB
Plaintext
// /**
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//
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// Copyright (c) 2020, Arm, Ltd. All rights reserved.<BR>
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// SPDX-License-Identifier: BSD-2-Clause-Patent
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//
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// Module Name:
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//
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// LinuxInitrdDynamicShellCommand.uni
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//
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// Abstract:
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//
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// String definitions for 'initrd' UEFI Shell command
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//
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// **/
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/=#
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#langdef en-US "english"
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#string STR_GEN_PROBLEM #language en-US "%H%s%N: Unknown flag - '%H%s%N'\r\n"
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#string STR_GEN_ALREADY_INSTALLED #language en-US "%H%s%N: Linux initrd already provided by platform\r\n"
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#string STR_GEN_TOO_MANY #language en-US "%H%s%N: Too many arguments.\r\n"
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#string STR_GEN_TOO_FEW #language en-US "%H%s%N: Too few arguments.\r\n"
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#string STR_GEN_FIND_FAIL #language en-US "%H%s%N: File not found - '%H%s%N'\r\n"
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#string STR_GEN_FILE_OPEN_FAIL #language en-US "%H%s%N: Cannot open file - '%H%s%N'\r\n"
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#string STR_GET_HELP_INITRD #language en-US ""
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".TH initrd 0 "Registers or unregisters a file as Linux initrd."\r\n"
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".SH NAME\r\n"
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"Registers or unregisters a file as Linux initrd.\r\n"
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".SH SYNOPSIS\r\n"
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" \r\n"
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"initrd <FileName>\r\n"
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"initrd -u\r\n"
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".SH OPTIONS\r\n"
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" \r\n"
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" FileName - Specifies a file to register as initrd.\r\n"
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" -u - Unregisters any previously registered initrd files.\r\n"
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".SH DESCRIPTION\r\n"
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" \r\n"
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"NOTES:\r\n"
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" 1. Only a single file can be loaded as initrd at any given time. Using the\r\n"
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" command twice with a <FileName> option will result in the first file to\r\n"
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" be unloaded again, regardless of whether the second invocation succeeded\r\n"
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" or not.\r\n"
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" 2. The initrd is not unloaded when the shell exits, and will remain active\r\n"
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" until it is unloaded again by a different invocation of the shell.\r\n"
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" Consumers of the LoadFile2 protocol on the LINUX_EFI_INITRD_MEDIA_GUID\r\n"
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" device path that are started via means other than the shell will be able\r\n"
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" to locate the protocol and invoke it.\r\n"
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" 3. Exposing an initrd using this command is only supported if no initrd is\r\n"
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" already being exposed by another driver on the platform.\r\n"
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