Commit 5f15684b authored Jan 10, 2018 by Richard Narron Committed by Jens Axboe Jan 10, 2018

partitions/msdos: Unable to mount UFS 44bsd partitions

UFS partitions from newer versions of FreeBSD 10 and 11 use relative
addressing for their subpartitions. But older versions of FreeBSD still
use absolute addressing just like OpenBSD and NetBSD.

Instead of simply testing for a FreeBSD partition, the code needs to
also test if the starting offset of the C subpartition is zero.

https://bugzilla.kernel.org/show_bug.cgi?id=197733



Signed-off-by: Richard Narron <comet.berkeley@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 93b57046

block/partitions/msdos.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -301,7 +301,9 @@ static void parse_bsd(struct parsed_partitions *state,
		continue;
		bsd_start = le32_to_cpu(p->p_offset);
		bsd_size = le32_to_cpu(p->p_size);
		if (memcmp(flavour, "bsd\0", 4) == 0)
		/* FreeBSD has relative offset if C partition offset is zero */
		if (memcmp(flavour, "bsd\0", 4) == 0 &&
		le32_to_cpu(l->d_partitions[2].p_offset) == 0)
		bsd_start += offset;
		if (offset == bsd_start && size == bsd_size)
		/* full parent partition, we have it already */

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