Add "bitmap" to allowed command-line values

Currently, the sysfs interface allows bitmap setup only when volume
is in an inactive state.
For external metadata to add bitmap to existing volume instead of
GROW, the UPDATE operation can be done.
The patch adds a "bitmap" argument to the allowed values for UPDATE.

Signed-off-by: Jakub Radtke <jakub.radtke@intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>

2 files changed, 14 insertions, 3 deletions

diff --git a/mdadm.8.in b/mdadm.8.in
index 34a93a8f..c89d901e 100644
--- a/mdadm.8.in
+++ b/mdadm.8.in
@@ -2408,9 +2408,11 @@ or
 .B \-\-update=
 option. The supported options are
 .BR name ,
-.B ppl
+.BR ppl ,
+.BR no\-ppl ,
+.BR bitmap
 and
-.BR no\-ppl .
+.BR no\-bitmap .
 
 The
 .B name
@@ -2428,6 +2430,13 @@ and
 options enable and disable PPL in the metadata. Currently supported only for
 IMSM subarrays.
 
+The
+.B bitmap
+and
+.B no\-bitmap
+options enable and disable write-intent bitmap in the metadata. Currently supported only for
+IMSM subarrays.
+
 .TP
 .B \-\-examine
 The device should be a component of an md array.
diff --git a/mdadm.c b/mdadm.c
index 493d70e4..9a4317d5 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -779,6 +779,8 @@ int main(int argc, char *argv[])
 				continue;
 			if (strcmp(c.update, "devicesize") == 0)
 				continue;
+			if (strcmp(c.update, "bitmap") == 0)
+				continue;
 			if (strcmp(c.update, "no-bitmap") == 0)
 				continue;
 			if (strcmp(c.update, "bbl") == 0)
@@ -827,7 +829,7 @@ int main(int argc, char *argv[])
 			fprintf(outf, "Valid --update options are:\n"
 		"     'sparc2.2', 'super-minor', 'uuid', 'name', 'nodes', 'resync',\n"
 		"     'summaries', 'homehost', 'home-cluster', 'byteorder', 'devicesize',\n"
-		"     'no-bitmap', 'metadata', 'revert-reshape'\n"
+		"     'bitmap', 'no-bitmap', 'metadata', 'revert-reshape'\n"
 		"     'bbl', 'no-bbl', 'force-no-bbl', 'ppl', 'no-ppl'\n"
 		"     'layout-original', 'layout-alternate', 'layout-unspecified'\n"
 				);