master - lvconvert: check for supported raid0/raid4 segtypes

[Heinz Mauelshagen]

Gitweb:        http://git.fedorahosted.org/git/?p=lvm2.git;a=commitdiff;h=e118b65d651d92139...
Commit:        e118b65d651d921390d3e8bbcac7170c3894d048
Parent:        61ae07966dfa68e7a03c054b1486136028c5c4a6
Author:        Heinz Mauelshagen 
AuthorDate:    Thu Oct 27 16:44:32 2016 +0200
Committer:     Heinz Mauelshagen 
CommitterDate: Thu Oct 27 16:44:32 2016 +0200

lvconvert: check for supported raid0/raid4 segtypes

Validate kernel support for raid0/raid4 on given and
requested segtype before requesting conversions on them.

Because raid10 wasn't present in old RAID targets, add
the same validation to be prepared once we support them.
---
 tools/lvconvert.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/tools/lvconvert.c b/tools/lvconvert.c
index 90642aa..23b5906 100644
--- a/tools/lvconvert.c
+++ b/tools/lvconvert.c
@@ -1963,16 +1963,24 @@ static int _lvconvert_raid(struct logical_volume *lv, struct lvconvert_params *l

if ((seg_is_linear(seg) || seg_is_striped(seg) || seg_is_mirrored(seg) || lv_is_raid(lv)) &&
        (lp->type_str && lp->type_str[0])) {
-		/* Activation is required later which precludes existing unsupported raid0 segment */
-		if (segtype_is_any_raid0(lp->segtype) &&
+		/* Activation is required later which precludes existing supported raid0 segment */
+		if ((seg_is_any_raid0(seg) || segtype_is_any_raid0(lp->segtype)) &&
    	    !(lp->target_attr & RAID_FEATURE_RAID0)) {
    		log_error("RAID module does not support RAID0.");
    		return 0;
    	}

+		/* Activation is required later which precludes existing supported raid4 segment */
    	if (!_raid4_conversion_supported(lv, lp))
    		return 0;

+		/* Activation is required later which precludes existing supported raid10 segment */
+		if ((seg_is_raid10(seg) || segtype_is_raid10(lp->segtype)) &&
+		    !(lp->target_attr & RAID_FEATURE_RAID10)) {
+			log_error("RAID module does not support RAID10.");
+			return 0;
+		}
+
    	if (!arg_is_set(cmd, stripes_long_ARG))
    		lp->stripes = 0;