Add 'ppl' and 'no-ppl' options for --update=

This can be used with --assemble for super1 and with --update-subarray
for imsm to enable or disable PPL in the metadata.

Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>

1 files changed, 24 insertions, 3 deletions

diff --git a/mdadm.8.in b/mdadm.8.in
index cad5db5..1178ed9 100644
--- a/mdadm.8.in
+++ b/mdadm.8.in
@@ -1176,6 +1176,8 @@ argument given to this flag can be one of
 .BR no\-bitmap ,
 .BR bbl ,
 .BR no\-bbl ,
+.BR ppl ,
+.BR no\-ppl ,
 .BR metadata ,
 or
 .BR super\-minor .
@@ -1316,6 +1318,16 @@ option will cause any reservation of space for a bad block list to be
 removed.  If the bad block list contains entries, this will fail, as
 removing the list could cause data corruption.
 
+The
+.B ppl
+option will enable PPL for a RAID5 array and reserve space for PPL on each
+device. There must be enough free space between the data and superblock and a
+write-intent bitmap or journal must not be used.
+
+The
+.B no\-ppl
+option will disable PPL in the superblock.
+
 .TP
 .BR \-\-freeze\-reshape
 Option is intended to be used in start-up scripts during initrd boot phase.
@@ -2327,9 +2339,11 @@ superblock field in the subarray.  Similar to updating an array in
 .B \-U
 or
 .B \-\-update=
-option.  Currently only
-.B name
-is supported.
+option. The supported options are
+.BR name ,
+.B ppl
+and
+.BR no\-ppl .
 
 The
 .B name
@@ -2340,6 +2354,13 @@ re\-assembled.  If updating
 would change the UUID of an active subarray this operation is blocked,
 and the command will end in an error.
 
+The
+.B ppl
+and
+.B no\-ppl
+options enable and disable PPL in the metadata. Currently supported only for
+IMSM subarrays.
+
 .TP
 .B \-\-examine
 The device should be a component of an md array.