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8228f47dfd
Now that we have support for the IGNOREME signature in cgpt, we need a way to set it on an existing disk. The easiest option is to shoehorn this into the cgpt legacy command, because that's already made to modify GPT header signatures (really, it would be nice to rename it to cgpt signature or something, but let's not break existing uses for now). BRANCH=None BUG=chrome-os-partner:52595 TEST=unit tests Change-Id: If2835fec28a9c39373abd050e2e057f73e5ec700 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/340073 Reviewed-by: Nam Nguyen <namnguyen@google.com>
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <string.h>
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#include "cgpt.h"
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#include "cgptlib_internal.h"
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#include "vboot_host.h"
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int CgptLegacy(CgptLegacyParams *params) {
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struct drive drive;
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int gpt_retval;
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GptHeader *h1, *h2;
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if (params == NULL)
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return CGPT_FAILED;
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if (CGPT_OK != DriveOpen(params->drive_name, &drive, O_RDWR,
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params->drive_size))
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return CGPT_FAILED;
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if (GPT_SUCCESS != (gpt_retval = GptSanityCheck(&drive.gpt))) {
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Error("GptSanityCheck() returned %d: %s\n",
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gpt_retval, GptError(gpt_retval));
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return CGPT_FAILED;
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}
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h1 = (GptHeader *)drive.gpt.primary_header;
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h2 = (GptHeader *)drive.gpt.secondary_header;
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if (params->mode == CGPT_LEGACY_MODE_EFIPART) {
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drive.gpt.ignored = MASK_NONE;
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memcpy(h1->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
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memcpy(h2->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
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RepairEntries(&drive.gpt, MASK_SECONDARY);
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drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
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GPT_MODIFIED_HEADER2);
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} else if (params->mode == CGPT_LEGACY_MODE_IGNORE_PRIMARY) {
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if (!(drive.gpt.valid_headers & MASK_SECONDARY) ||
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!(drive.gpt.valid_entries & MASK_SECONDARY) ||
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drive.gpt.ignored & MASK_SECONDARY) {
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Error("Refusing to mark primary GPT ignored unless secondary is valid.");
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return CGPT_FAILED;
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}
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memset(h1, 0, sizeof(*h1));
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memcpy(h1->signature, GPT_HEADER_SIGNATURE_IGNORED,
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GPT_HEADER_SIGNATURE_SIZE);
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drive.gpt.modified |= GPT_MODIFIED_HEADER1;
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} else {
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memcpy(h1->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
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memcpy(h2->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
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memset(drive.gpt.primary_entries, 0, drive.gpt.sector_bytes);
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drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
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GPT_MODIFIED_HEADER2);
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}
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UpdateCrc(&drive.gpt);
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// Write it all out
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return DriveClose(&drive, 1);
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}
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