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// 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>
*/
/**
* discover-loop: Use fabrics commands to discover any loop targets and print
* those records. You must have at least one configured nvme loop target on the
* system (no existing connection required). The output will look more
* interesting with more targets.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <libnvme.h>
#include <ccan/endian/endian.h>
static void print_discover_log(struct nvmf_discovery_log *log)
{
int i, numrec = le64_to_cpu(log->numrec);
printf(".\n");
printf("|-- genctr:%llx\n", log->genctr);
printf("|-- numrec:%x\n", numrec);
printf("`-- recfmt:%x\n", log->recfmt);
for (i = 0; i < numrec; i++) {
struct nvmf_disc_log_entry *e = &log->entries[i];
printf(" %c-- Entry:%d\n", (i < numrec - 1) ? '|' : '`', i);
printf(" %c |-- trtype:%x\n", (i < numrec - 1) ? '|' : ' ', e->trtype);
printf(" %c |-- adrfam:%x\n", (i < numrec - 1) ? '|' : ' ', e->adrfam);
printf(" %c |-- subtype:%x\n", (i < numrec - 1) ? '|' : ' ', e->subtype);
printf(" %c |-- treq:%x\n", (i < numrec - 1) ? '|' : ' ', e->treq);
printf(" %c |-- portid:%x\n", (i < numrec - 1) ? '|' : ' ', e->portid);
printf(" %c |-- cntlid:%x\n", (i < numrec - 1) ? '|' : ' ', e->cntlid);
printf(" %c |-- asqsz:%x\n", (i < numrec - 1) ? '|' : ' ', e->asqsz);
printf(" %c |-- trsvcid:%s\n", (i < numrec - 1) ? '|' : ' ', e->trsvcid);
printf(" %c |-- subnqn:%s\n", (i < numrec - 1) ? '|' : ' ', e->subnqn);
printf(" %c `-- traddr:%s\n", (i < numrec - 1) ? '|' : ' ', e->traddr);
}
}
int main()
{
struct nvmf_discovery_log *log = NULL;
nvme_root_t r;
nvme_host_t h;
nvme_ctrl_t c;
int ret;
struct nvme_fabrics_config cfg;
nvmf_default_config(&cfg);
r = nvme_scan(NULL);
h = nvme_default_host(r);
if (!h) {
fprintf(stderr, "Failed to allocated memory\n");
return ENOMEM;
}
c = nvme_create_ctrl(r, NVME_DISC_SUBSYS_NAME, "loop",
NULL, NULL, NULL, NULL);
if (!c) {
fprintf(stderr, "Failed to allocate memory\n");
return ENOMEM;
}
ret = nvmf_add_ctrl(h, c, &cfg);
if (ret < 0) {
fprintf(stderr, "no controller found\n");
return errno;
}
ret = nvmf_get_discovery_log(c, &log, 4);
nvme_disconnect_ctrl(c);
nvme_free_ctrl(c);
if (ret)
fprintf(stderr, "nvmf-discover-log:%x\n", ret);
else
print_discover_log(log);
nvme_free_tree(r);
return 0;
}
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