53 lines
2.3 KiB
Diff
53 lines
2.3 KiB
Diff
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From 3b168aa842dc80a6d95b2c1ccb52a8ef664e7aba Mon Sep 17 00:00:00 2001
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From: "Richard W.M. Jones" <rjones@redhat.com>
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Date: Wed, 20 Dec 2023 10:34:10 +0000
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Subject: [PATCH] partition: Suggest alternate partition-sectorsize
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When we reach this error it means that we have failed to detect the
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"EFI PART" signature (indicating GPT) and we've fallen back to parsing
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MBR, but in doing so we have discovered a GPT protective MBR which
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should only happen for GPT. A possible cause for missing the
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signature was because we have the wrong sector size.
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Therefore check for the current sector size (which should be either
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512 or 4096) and suggest that the user sets the other sector size.
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Also avoids the case where the user already set partition-sectorsize=4k
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and we were suggesting that they set it again.
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Reported-by: Ming Xie
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Fixes: commit 7b9301a4c569456a4f96784229a2cd48e8957662
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Fixes: https://issues.redhat.com/browse/RHEL-19815
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(cherry picked from commit cd761c9bf770b23f678fd82f0d1c8d4cce2ed1b5)
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---
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filters/partition/partition-mbr.c | 13 ++++++++++---
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1 file changed, 10 insertions(+), 3 deletions(-)
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diff --git a/filters/partition/partition-mbr.c b/filters/partition/partition-mbr.c
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index 3927c31f..6a81addb 100644
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--- a/filters/partition/partition-mbr.c
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+++ b/filters/partition/partition-mbr.c
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@@ -87,9 +87,16 @@ find_mbr_partition (nbdkit_next *next,
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!is_extended (partition.part_type_byte) &&
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partnum == i+1) {
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if (partition.part_type_byte == 0xEE) {
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- nbdkit_error ("rejecting GPT protective entry from MBR, "
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- "if the underlying storage uses 4K sectors "
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- "try using partition-sectorsize=4k");
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+ if (sector_size == 512)
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+ nbdkit_error ("rejecting GPT protective entry from MBR, "
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+ "if the underlying storage uses 4K sectors "
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+ "try using partition-sectorsize=4k");
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+ else if (sector_size == 4096)
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+ nbdkit_error ("rejecting GPT protective entry from MBR, "
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+ "if the underlying storage uses 512 byte sectors "
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+ "try using partition-sectorsize=512");
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+ else
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+ nbdkit_error ("rejecting GPT protective entry from MBR");
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return -1;
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}
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*offset_r = partition.start_sector * (int64_t) sector_size;
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--
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2.39.3
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