dm raid: inverse check for flags from invalid to valid flags

It is more intuitive to manage each raid level's features in terms of
what is supported rather than what isn't supported.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/dm-raid.c

@@ -113,26 +113,35 @@ struct raid_dev {
 				  CTR_FLAG_DELTA_DISKS | \
 				  CTR_FLAG_DATA_OFFSET)
 
-/* All ctr optional arguments */
-#define ALL_CTR_FLAGS		(CTR_FLAG_OPTIONS_NO_ARGS | \
-				 CTR_FLAG_OPTIONS_ONE_ARG)
+/* Valid options definitions per raid level... */
 
-/* Invalid options definitions per raid level... */
+/* "raid0" does only accept data offset */
+#define RAID0_VALID_FLAGS	(CTR_FLAG_DATA_OFFSET)
 
-/* "raid0" does not accept any options */
-#define RAID0_INVALID_FLAGS ALL_CTR_FLAGS
+/* "raid1" does not accept stripe cache, data offset, delta_disks or any raid10 options */
+#define RAID1_VALID_FLAGS	(CTR_FLAGS_ANY_SYNC | \
+				 CTR_FLAG_REBUILD | \
+				 CTR_FLAG_WRITE_MOSTLY | \
+				 CTR_FLAG_DAEMON_SLEEP | \
+				 CTR_FLAG_MIN_RECOVERY_RATE | \
+				 CTR_FLAG_MAX_RECOVERY_RATE | \
+				 CTR_FLAG_MAX_WRITE_BEHIND | \
+				 CTR_FLAG_REGION_SIZE | \
+				 CTR_FLAG_DATA_OFFSET)
 
-/* "raid1" does not accept stripe cache or any raid10 options */
-#define RAID1_INVALID_FLAGS	(CTR_FLAG_STRIPE_CACHE | \
+/* "raid10" does not accept any raid1 or stripe cache options */
+#define RAID10_VALID_FLAGS	(CTR_FLAGS_ANY_SYNC | \
+				 CTR_FLAG_REBUILD | \
+				 CTR_FLAG_DAEMON_SLEEP | \
+				 CTR_FLAG_MIN_RECOVERY_RATE | \
+				 CTR_FLAG_MAX_RECOVERY_RATE | \
+				 CTR_FLAG_REGION_SIZE | \
 				 CTR_FLAG_RAID10_COPIES | \
 				 CTR_FLAG_RAID10_FORMAT | \
 				 CTR_FLAG_DELTA_DISKS | \
-				 CTR_FLAG_DATA_OFFSET)
+				 CTR_FLAG_DATA_OFFSET | \
+				 CTR_FLAG_RAID10_USE_NEAR_SETS)
 
-/* "raid10" does not accept any raid1 or stripe cache options */
-#define RAID10_INVALID_FLAGS	(CTR_FLAG_WRITE_MOSTLY | \
-				 CTR_FLAG_MAX_WRITE_BEHIND | \
-				 CTR_FLAG_STRIPE_CACHE)
 /*
  * "raid4/5/6" do not accept any raid1 or raid10 specific options
  *
@@ -140,13 +149,28 @@ struct raid_dev {
  * that both parity and q-syndrome are being written properly with
  * any writes
  */
-#define RAID45_INVALID_FLAGS	(CTR_FLAG_WRITE_MOSTLY | \
+#define RAID45_VALID_FLAGS	(CTR_FLAGS_ANY_SYNC | \
+				 CTR_FLAG_REBUILD | \
+				 CTR_FLAG_DAEMON_SLEEP | \
+				 CTR_FLAG_MIN_RECOVERY_RATE | \
+				 CTR_FLAG_MAX_RECOVERY_RATE | \
 				 CTR_FLAG_MAX_WRITE_BEHIND | \
-				 CTR_FLAG_RAID10_FORMAT | \
-				 CTR_FLAG_RAID10_COPIES | \
-				 CTR_FLAG_RAID10_USE_NEAR_SETS)
-#define RAID6_INVALID_FLAGS	(CTR_FLAG_NOSYNC | RAID45_INVALID_FLAGS)
-/* ...invalid options definitions per raid level */
+				 CTR_FLAG_STRIPE_CACHE | \
+				 CTR_FLAG_REGION_SIZE | \
+				 CTR_FLAG_DELTA_DISKS | \
+				 CTR_FLAG_DATA_OFFSET)
+
+#define RAID6_VALID_FLAGS	(CTR_FLAG_SYNC | \
+				 CTR_FLAG_REBUILD | \
+				 CTR_FLAG_DAEMON_SLEEP | \
+				 CTR_FLAG_MIN_RECOVERY_RATE | \
+				 CTR_FLAG_MAX_RECOVERY_RATE | \
+				 CTR_FLAG_MAX_WRITE_BEHIND | \
+				 CTR_FLAG_STRIPE_CACHE | \
+				 CTR_FLAG_REGION_SIZE | \
+				 CTR_FLAG_DELTA_DISKS | \
+				 CTR_FLAG_DATA_OFFSET)
+/* ...valid options definitions per raid level */
 
 /*
  * Flags for rs->runtime_flags field
@@ -354,31 +378,31 @@ static bool rt_is_raid456(struct raid_type *rt)
 }
 /* END: raid level bools */
 
-/* Return invalid ctr flags for the raid level of @rs */
-static uint32_t __invalid_flags(struct raid_set *rs)
+/* Return valid ctr flags for the raid level of @rs */
+static unsigned long __valid_flags(struct raid_set *rs)
 {
 	if (rt_is_raid0(rs->raid_type))
-		return RAID0_INVALID_FLAGS;
+		return RAID0_VALID_FLAGS;
 	else if (rt_is_raid1(rs->raid_type))
-		return RAID1_INVALID_FLAGS;
+		return RAID1_VALID_FLAGS;
 	else if (rt_is_raid10(rs->raid_type))
-		return RAID10_INVALID_FLAGS;
+		return RAID10_VALID_FLAGS;
 	else if (rt_is_raid45(rs->raid_type))
-		return RAID45_INVALID_FLAGS;
+		return RAID45_VALID_FLAGS;
 	else if (rt_is_raid6(rs->raid_type))
-		return RAID6_INVALID_FLAGS;
+		return RAID6_VALID_FLAGS;
 
 	return ~0;
 }
 
 /*
- * Check for any invalid flags set on @rs defined by bitset @invalid_flags
+ * Check for valid flags set on @rs
  *
  * Has to be called after parsing of the ctr flags!
  */
-static int rs_check_for_invalid_flags(struct raid_set *rs)
+static int rs_check_for_valid_flags(struct raid_set *rs)
 {
-	if (rs->ctr_flags & __invalid_flags(rs)) {
+	if (rs->ctr_flags & ~__valid_flags(rs)) {
 		rs->ti->error = "Invalid flags combination";
 		return -EINVAL;
 	}
@@ -1282,7 +1306,7 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as,
 	rs->md.external = 1;
 
 	/* Check, if any invalid ctr arguments have been passed in for the raid level */
-	return rs_check_for_invalid_flags(rs);
+	return rs_check_for_valid_flags(rs);
 }
 
 /* Return # of data stripes as kept in mddev as of @rs (i.e. as of superblock) */