92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
// SPDX-License-Identifier: LGPL-2.1-or-later
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/**
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* This file is part of libnvme.
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* Copyright (c) 2020 Western Digital Corporation or its affiliates.
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*
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* Authors: Keith Busch <keith.busch@wdc.com>
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*/
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/**
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* discover-loop: Use fabrics commands to discover any loop targets and print
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* those records. You must have at least one configured nvme loop target on the
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* system (no existing connection required). The output will look more
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* interesting with more targets.
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*/
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#define __SANE_USERSPACE_TYPES__
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <libnvme.h>
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#include <ccan/endian/endian.h>
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static void print_discover_log(struct nvmf_discovery_log *log)
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{
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int i, numrec = le64_to_cpu(log->numrec);
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printf(".\n");
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printf("|-- genctr:%llx\n", log->genctr);
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printf("|-- numrec:%x\n", numrec);
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printf("`-- recfmt:%x\n", log->recfmt);
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for (i = 0; i < numrec; i++) {
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struct nvmf_disc_log_entry *e = &log->entries[i];
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printf(" %c-- Entry:%d\n", (i < numrec - 1) ? '|' : '`', i);
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printf(" %c |-- trtype:%x\n", (i < numrec - 1) ? '|' : ' ', e->trtype);
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printf(" %c |-- adrfam:%x\n", (i < numrec - 1) ? '|' : ' ', e->adrfam);
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printf(" %c |-- subtype:%x\n", (i < numrec - 1) ? '|' : ' ', e->subtype);
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printf(" %c |-- treq:%x\n", (i < numrec - 1) ? '|' : ' ', e->treq);
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printf(" %c |-- portid:%x\n", (i < numrec - 1) ? '|' : ' ', e->portid);
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printf(" %c |-- cntlid:%x\n", (i < numrec - 1) ? '|' : ' ', e->cntlid);
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printf(" %c |-- asqsz:%x\n", (i < numrec - 1) ? '|' : ' ', e->asqsz);
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printf(" %c |-- trsvcid:%s\n", (i < numrec - 1) ? '|' : ' ', e->trsvcid);
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printf(" %c |-- subnqn:%s\n", (i < numrec - 1) ? '|' : ' ', e->subnqn);
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printf(" %c `-- traddr:%s\n", (i < numrec - 1) ? '|' : ' ', e->traddr);
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}
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}
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int main()
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{
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struct nvmf_discovery_log *log = NULL;
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nvme_root_t r;
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nvme_host_t h;
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nvme_ctrl_t c;
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int ret;
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struct nvme_fabrics_config cfg;
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nvmf_default_config(&cfg);
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r = nvme_scan(NULL);
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h = nvme_default_host(r);
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if (!h) {
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fprintf(stderr, "Failed to allocated memory\n");
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return ENOMEM;
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}
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c = nvme_create_ctrl(r, NVME_DISC_SUBSYS_NAME, "loop",
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NULL, NULL, NULL, NULL);
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if (!c) {
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fprintf(stderr, "Failed to allocate memory\n");
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return ENOMEM;
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}
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ret = nvmf_add_ctrl(h, c, &cfg);
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if (ret < 0) {
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fprintf(stderr, "no controller found\n");
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return errno;
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}
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ret = nvmf_get_discovery_log(c, &log, 4);
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nvme_disconnect_ctrl(c);
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nvme_free_ctrl(c);
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if (ret)
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fprintf(stderr, "nvmf-discover-log:%x\n", ret);
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else
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print_discover_log(log);
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nvme_free_tree(r);
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free(log);
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return 0;
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}
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