libnvme: add 'application' setting to nvme_root

Add an 'application' string to the tree root to indicate which
application manages this configuration.

Signed-off-by: Hannes Reinecke <[email protected]>

Author: hreinecke

libnvme/nvme.i

@@ -326,7 +326,9 @@ PyObject *hostid_from_file();
 
 struct nvme_root {
 	%immutable config_file;
+	%immutable application;
 	char *config_file;
+	char *application;
 };
 
 struct nvme_host {

src/libnvme.map

@@ -5,6 +5,8 @@ LIBNVME_1_5 {
 		nvme_ipaddrs_eq;
 		nvme_nbft_free;
 		nvme_nbft_read;
+		nvme_root_get_application;
+		nvme_root_set_application;
 		nvme_subsystem_get_application;
 		nvme_subsystem_set_application;
 };

src/nvme/private.h

@@ -155,6 +155,7 @@ struct nvme_fabric_options {
 
 struct nvme_root {
 	char *config_file;
+	char *application;
 	struct list_head hosts;
 	struct list_head endpoints; /* MI endpoints */
 	FILE *fp;

src/nvme/tree.c

@@ -197,6 +197,19 @@ int nvme_dump_tree(nvme_root_t r)
 	return json_dump_tree(r);
 }
 
+const char *nvme_root_get_application(nvme_root_t r)
+{
+	return r->application;
+}
+
+void nvme_root_set_application(nvme_root_t r, const char *a)
+{
+	if (r->application)
+		free(r->application);
+	if (a)
+		r->application = strdup(a);
+}
+
 nvme_host_t nvme_first_host(nvme_root_t r)
 {
 	return list_top(&r->hosts, struct nvme_host, entry);
@@ -293,6 +306,8 @@ void nvme_free_tree(nvme_root_t r)
 		__nvme_free_host(h);
 	if (r->config_file)
 		free(r->config_file);
+	if (r->application)
+		free(r->application);
 	free(r);
 }
 
@@ -404,6 +419,8 @@ static void __nvme_free_subsystem(struct nvme_subsystem *s)
 		free(s->firmware);
 	if (s->subsystype)
 		free(s->subsystype);
+	if (s->application)
+		free(s->application);
 	free(s);
 }
 

src/nvme/tree.h

@@ -44,6 +44,23 @@ typedef bool (*nvme_scan_filter_t)(nvme_subsystem_t, nvme_ctrl_t,
  */
 nvme_root_t nvme_create_root(FILE *fp, int log_level);
 
+/**
+ * nvme_root_set_application - Specify managing application
+ * @r:	&nvme_root_t object
+ * @a:	Application string
+ *
+ * Sets the managing application string for @r.
+ */
+void nvme_root_set_application(nvme_root_t r, const char *a);
+
+/**
+ * nvme_root_get_application - Get managing application
+ * @r:	&nvme_root_t object
+ *
+ * Returns the managing application string for @r or NULL if not set.
+ */
+const char *nvme_root_get_application(nvme_root_t r);
+
 /**
  * nvme_free_tree() - Free root object
  * @r:	&nvme_root_t object