From 5f15684bd5e5ef39d4337988864fec8012471dda Mon Sep 17 00:00:00 2001
From: Richard Narron <comet.berkeley@gmail.com>
Date: Wed, 10 Jan 2018 09:12:16 -0700
Subject: [PATCH] partitions/msdos: Unable to mount UFS 44bsd partitions
Git-commit: 5f15684bd5e5ef39d4337988864fec8012471dda
Patch-mainline: v4.16-rc1
References: bsc#1051510
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
block/partitions/msdos.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/block/partitions/msdos.c
+++ b/block/partitions/msdos.c
@@ -300,7 +300,9 @@ static void parse_bsd(struct parsed_part
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 */