File ndctl-namespace-skip-zero-namespaces-when-processing.patch of Package ndctl.16556

From ff4e8668a5edd2eaa38f08deb9b357778019e2ea Mon Sep 17 00:00:00 2001
From: Michal Suchanek <msuchanek@suse.de>
Date: Fri, 3 Apr 2020 19:38:33 +0200
Subject: [PATCH] ndctl/namespace: skip zero namespaces when processing all
 namespaces.

Upstream: submitted https://patchwork.kernel.org/patch/11681433/

The kernel always creates zero length namespace with uuid 0 in each
region.

When processing all namespaces the user gets confusing errors from ndctl
trying to process this namespace. Skip it.

The user can still specify the namespace by name directly in case
processing it is desirable.

Fixes: #41
Reviewed-by: Santosh S <santosh@fossix.org>
Tested-by: Harish Sriram <harish@linux.ibm.com>
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
---
 ndctl/namespace.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/ndctl/namespace.c b/ndctl/namespace.c
index e734248c9752..3fabe4799d75 100644
--- a/ndctl/namespace.c
+++ b/ndctl/namespace.c
@@ -2171,9 +2171,19 @@ static int do_xaction_namespace(const char *namespace,
 			ndctl_namespace_foreach_safe(region, ndns, _n) {
 				ndns_name = ndctl_namespace_get_devname(ndns);
 
-				if (strcmp(namespace, "all") != 0
-						&& strcmp(namespace, ndns_name) != 0)
-					continue;
+				if (strcmp(namespace, "all") == 0) {
+					static const uuid_t zero_uuid;
+					uuid_t uuid;
+
+					ndctl_namespace_get_uuid(ndns, uuid);
+					if (!ndctl_namespace_get_size(ndns) &&
+					    !memcmp(uuid, zero_uuid, sizeof(uuid_t)))
+						continue;
+				} else {
+					if (strcmp(namespace, ndns_name) != 0)
+						continue;
+				}
+
 				switch (action) {
 				case ACTION_DISABLE:
 					rc = ndctl_namespace_disable_safe(ndns);
-- 
2.28.0