[ndctl PATCH 34/36] ndctl/list: Add option to list configured + disabled namespaces

[Dan Williams <dan.j.williams@intel.com>]

When inspecting namespaces multiple tools require the namespace to be
disabled so that the tool can change modes to inspect namespace
metadata, for example read-infoblock and check-namespace.

While a namespace is disabled it can be listed with "--idle", but that
will also include seed namespaces in the output. Add a --configured
option that lists includes namespaces with non-zero size in the listing.
For regions, dimms, and buses, it is equivalent to --idle.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 Documentation/ndctl/ndctl-list.txt |    6 ++++++
 ndctl/list.c                       |   23 ++++++++++++++++++-----
 util/json.c                        |    3 ++-
 util/json.h                        |    1 +
 4 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/Documentation/ndctl/ndctl-list.txt b/Documentation/ndctl/ndctl-list.txt
index bc725baa6656..7c7e3ac9d05c 100644
--- a/Documentation/ndctl/ndctl-list.txt
+++ b/Documentation/ndctl/ndctl-list.txt
@@ -179,6 +179,12 @@ include::xable-bus-options.txt[]
 --idle::
 	Include idle (not enabled) devices in the listing
 
+-c::
+--configured::
+	Include configured devices (non-zero sized namespaces)
+	regardless of whether they are enabled, or not. Other devices
+	besides namespaces are always considered "configured".
+
 -C::
 --capabilities::
 	Include region capabilities in the listing, i.e. supported
diff --git a/ndctl/list.c b/ndctl/list.c
index aedccfe8fe75..31fb1b9593a2 100644
--- a/ndctl/list.c
+++ b/ndctl/list.c
@@ -37,6 +37,7 @@ static struct {
 	bool human;
 	bool firmware;
 	bool capabilities;
+	bool configured;
 	int verbose;
 } list;
 
@@ -46,6 +47,8 @@ static unsigned long listopts_to_flags(void)
 
 	if (list.idle)
 		flags |= UTIL_JSON_IDLE;
+	if (list.configured)
+		flags |= UTIL_JSON_CONFIGURED;
 	if (list.media_errors)
 		flags |= UTIL_JSON_MEDIA_ERRORS;
 	if (list.dax)
@@ -165,7 +168,8 @@ static struct json_object *region_to_json(struct ndctl_region *region,
 		if (!util_dimm_filter(dimm, param.dimm))
 			continue;
 
-		if (!list.idle && !ndctl_dimm_is_enabled(dimm))
+		if (!list.configured && !list.idle
+				&& !ndctl_dimm_is_enabled(dimm))
 			continue;
 
 		if (!jmappings) {
@@ -242,8 +246,15 @@ static void filter_namespace(struct ndctl_namespace *ndns,
 	struct json_object *jndns;
 	struct list_filter_arg *lfa = ctx->list;
 	struct json_object *container = lfa->jregion ? lfa->jregion : lfa->jbus;
-
-	if (!list.idle && !ndctl_namespace_is_active(ndns))
+	unsigned long long size = ndctl_namespace_get_size(ndns);
+
+	if (ndctl_namespace_is_active(ndns))
+		/* pass */;
+	else if (list.idle)
+		/* pass */;
+	else if (list.configured && (size > 0 && size < ULLONG_MAX))
+		/* pass */;
+	else
 		return;
 
 	if (!lfa->jnamespaces) {
@@ -277,7 +288,7 @@ static bool filter_region(struct ndctl_region *region,
 	if (!list.regions)
 		return true;
 
-	if (!list.idle && !ndctl_region_is_enabled(region))
+	if (!list.configured && !list.idle && !ndctl_region_is_enabled(region))
 		return true;
 
 	if (!lfa->jregions) {
@@ -319,7 +330,7 @@ static void filter_dimm(struct ndctl_dimm *dimm, struct util_filter_ctx *ctx)
 	struct list_filter_arg *lfa = ctx->list;
 	struct json_object *jdimm;
 
-	if (!list.idle && !ndctl_dimm_is_enabled(dimm))
+	if (!list.configured && !list.idle && !ndctl_dimm_is_enabled(dimm))
 		return;
 
 	if (!lfa->jdimms) {
@@ -477,6 +488,8 @@ int cmd_list(int argc, const char **argv, struct ndctl_ctx *ctx)
 		OPT_BOOLEAN('C', "capabilities", &list.capabilities,
 				"include region capability info"),
 		OPT_BOOLEAN('i', "idle", &list.idle, "include idle devices"),
+		OPT_BOOLEAN('c', "configured", &list.configured,
+				"include configured namespaces, disabled or not"),
 		OPT_BOOLEAN('M', "media-errors", &list.media_errors,
 				"include media errors"),
 		OPT_BOOLEAN('u', "human", &list.human,
diff --git a/util/json.c b/util/json.c
index 50346c5bcbab..21ab25674624 100644
--- a/util/json.c
+++ b/util/json.c
@@ -339,7 +339,8 @@ struct json_object *util_daxctl_devs_to_list(struct daxctl_region *region,
 		if (!util_daxctl_dev_filter(dev, ident))
 			continue;
 
-		if (!(flags & UTIL_JSON_IDLE) && !daxctl_dev_get_size(dev))
+		if (!(flags & (UTIL_JSON_IDLE|UTIL_JSON_CONFIGURED))
+				&& !daxctl_dev_get_size(dev))
 			continue;
 
 		if (!jdevs) {
diff --git a/util/json.h b/util/json.h
index 7c3f64932cec..6d39d3aa4693 100644
--- a/util/json.h
+++ b/util/json.h
@@ -25,6 +25,7 @@ enum util_json_flags {
 	UTIL_JSON_HUMAN = (1 << 4),
 	UTIL_JSON_VERBOSE = (1 << 5),
 	UTIL_JSON_CAPABILITIES = (1 << 6),
+	UTIL_JSON_CONFIGURED = (1 << 7),
 };
 
 struct json_object;
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