[dm-devel] [PATCH 1/2] dm: Add feature flags to dm-mpath

[Mike Anderson <andmike linux vnet ibm com>]

Add a feature flag attribute to the multipath structure.

Signed-off-by: Mike Anderson <andmike linux vnet ibm com>
---
 drivers/md/dm-mpath.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 826bce7..4200d03 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -82,6 +82,7 @@ struct multipath {
 	unsigned saved_queue_if_no_path;/* Saved state during suspension */
 	unsigned pg_init_retries;	/* Number of times to retry pg_init */
 	unsigned pg_init_count;		/* Number of times pg_init called */
+	unsigned long features;
 
 	struct work_struct process_queued_ios;
 	struct list_head queued_ios;
@@ -118,6 +119,15 @@ static void trigger_event(struct work_struct *work);
 static void activate_path(struct work_struct *work);
 static void deactivate_path(struct work_struct *work);
 
+static int multipath_test_feature(struct multipath *m, unsigned feature)
+{
+	return test_bit(feature, &m->features);
+}
+
+static void multipath_set_feature(struct multipath *m, unsigned feature)
+{
+	set_bit(feature, &m->features);
+}
 
 /*-----------------------------------------------
  * Allocation routines
-- 
1.6.6.1