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-rw-r--r--examples/display-tree.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/examples/display-tree.c b/examples/display-tree.c
new file mode 100644
index 0000000..b9ea75f
--- /dev/null
+++ b/examples/display-tree.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/**
+ * This file is part of libnvme.
+ * Copyright (c) 2020 Western Digital Corporation or its affiliates.
+ *
+ * Authors: Keith Busch <keith.busch@wdc.com>
+ */
+
+/**
+ * display-tree: Scans the nvme topology, prints as an ascii tree with some
+ * selected attributes for each component.
+ */
+#include <stdio.h>
+#include <inttypes.h>
+#include <libnvme.h>
+
+int main()
+{
+ nvme_root_t r;
+ nvme_host_t h;
+ nvme_subsystem_t s, _s;
+ nvme_ctrl_t c, _c;
+ nvme_path_t p, _p;
+ nvme_ns_t n, _n;
+
+ r = nvme_scan(NULL);
+ if (!r)
+ return -1;
+
+ printf(".\n");
+ nvme_for_each_host(r, h) {
+ nvme_for_each_subsystem_safe(h, s, _s) {
+ printf("%c-- %s - NQN=%s\n", _s ? '|' : '`',
+ nvme_subsystem_get_name(s),
+ nvme_subsystem_get_nqn(s));
+
+ nvme_subsystem_for_each_ns_safe(s, n, _n) {
+ printf("%c |-- %s lba size:%d lba max:%" PRIu64 "\n",
+ _s ? '|' : ' ',
+ nvme_ns_get_name(n),
+ nvme_ns_get_lba_size(n),
+ nvme_ns_get_lba_count(n));
+ }
+
+ nvme_subsystem_for_each_ctrl_safe(s, c, _c) {
+ printf("%c %c-- %s %s %s %s\n",
+ _s ? '|' : ' ', _c ? '|' : '`',
+ nvme_ctrl_get_name(c),
+ nvme_ctrl_get_transport(c),
+ nvme_ctrl_get_address(c),
+ nvme_ctrl_get_state(c));
+
+ nvme_ctrl_for_each_ns_safe(c, n, _n)
+ printf("%c %c %c-- %s lba size:%d lba max:%" PRIu64 "\n",
+ _s ? '|' : ' ', _c ? '|' : ' ',
+ _n ? '|' : '`',
+ nvme_ns_get_name(n),
+ nvme_ns_get_lba_size(n),
+ nvme_ns_get_lba_count(n));
+
+ nvme_ctrl_for_each_path_safe(c, p, _p)
+ printf("%c %c %c-- %s %s\n",
+ _s ? '|' : ' ', _c ? '|' : ' ',
+ _p ? '|' : '`',
+ nvme_path_get_name(p),
+ nvme_path_get_ana_state(p));
+ }
+ }
+ }
+ nvme_free_tree(r);
+ return 0;
+}