[Libguestfs] [PATCH] md-create: specify that the "chunk" parameter should be absent for RAID1

[Laszlo Ersek]

Recently, mdadm has started (correctly) rejecting the "chunk" parameter
for RAID1; see e.g. <https://bugzilla.redhat.com/show_bug.cgi?id=1987170>.
Update the documentation accordingly, and in the mdadm test case, move the
"chunk:65536" parameter from a RAID1 creation command to a RAID5 one.

Suggested-by: Richard W.M. Jones <rjones at redhat.com>
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---
 generator/actions_core.ml | 3 +++
 tests/md/test-mdadm.sh    | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/generator/actions_core.ml b/generator/actions_core.ml
index 226fb860a073..8884f358079b 100644
--- a/generator/actions_core.ml
+++ b/generator/actions_core.ml
@@ -6566,6 +6566,9 @@ If not set, this defaults to C<0>.
 
 The chunk size in bytes.
 
+The C<chunk> parameter does not make sense, and should not be specified,
+when C<level> is C<raid1> (which is the default; see below).
+
 =item C<level>
 
 The RAID level, which can be one of:
diff --git a/tests/md/test-mdadm.sh b/tests/md/test-mdadm.sh
index b961581baf7d..fac6c27fdd25 100755
--- a/tests/md/test-mdadm.sh
+++ b/tests/md/test-mdadm.sh
@@ -63,13 +63,13 @@ part-add /dev/sdd p $p4_start $p4_end
 
 # RAID 1.
 md-create r1t1 "/dev/sda1 /dev/sdb1"
-md-create r1t2 "/dev/sdc1 /dev/sdd1" chunk:65536
+md-create r1t2 "/dev/sdc1 /dev/sdd1"
 
 # RAID 5.
 md-create r5t1 "/dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2" \
   missingbitmap:0x10 nrdevices:4 spare:1 level:5
 
-md-create r5t2 "/dev/sda3 /dev/sdb3" missingbitmap:0x1 level:5
+md-create r5t2 "/dev/sda3 /dev/sdb3" missingbitmap:0x1 level:5 chunk:65536
 
 md-create r5t3 "/dev/sdc3 /dev/sdd3" \
   missingbitmap:0x6 nrdevices:2 spare:2 level:5

base-commit: 19cc3dbcc4c45a1f4afe188d2e2ef4f8de217963
-- 
2.19.1.3.g30247aa5d201