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fabrics.c
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fabrics.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2016 Intel Corporation. All rights reserved.
* Copyright (c) 2016 HGST, a Western Digital Company.
* Copyright (c) 2016 Samsung Electronics Co., Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This file implements the discovery controller feature of NVMe over
* Fabrics specification standard.
*/
#include <errno.h>
#include <getopt.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include <unistd.h>
#include <dirent.h>
#include <inttypes.h>
#include <libgen.h>
#include <sys/stat.h>
#include <stddef.h>
#include <syslog.h>
#include <time.h>
#include <sys/types.h>
#include <linux/types.h>
#include "common.h"
#include "nvme.h"
#include "nbft.h"
#include "libnvme.h"
#include "nvme-print.h"
#include "fabrics.h"
#define PATH_NVMF_DISC SYSCONFDIR "/nvme/discovery.conf"
#define PATH_NVMF_CONFIG SYSCONFDIR "/nvme/config.json"
#define MAX_DISC_ARGS 32
#define MAX_DISC_RETRIES 10
#define NVMF_DEF_DISC_TMO 30
/* Name of file to output log pages in their raw format */
static char *raw;
static bool persistent;
static bool quiet;
static bool dump_config;
static const char *nvmf_tport = "transport type";
static const char *nvmf_traddr = "transport address";
static const char *nvmf_nqn = "subsystem nqn";
static const char *nvmf_trsvcid = "transport service id (e.g. IP port)";
static const char *nvmf_htraddr = "host traddr (e.g. FC WWN's)";
static const char *nvmf_hiface = "host interface (for tcp transport)";
static const char *nvmf_hostnqn = "user-defined hostnqn";
static const char *nvmf_hostid = "user-defined hostid (if default not used)";
static const char *nvmf_hostkey = "user-defined dhchap key (if default not used)";
static const char *nvmf_ctrlkey = "user-defined dhchap controller key (for bi-directional authentication)";
static const char *nvmf_nr_io_queues = "number of io queues to use (default is core count)";
static const char *nvmf_nr_write_queues = "number of write queues to use (default 0)";
static const char *nvmf_nr_poll_queues = "number of poll queues to use (default 0)";
static const char *nvmf_queue_size = "number of io queue elements to use (default 128)";
static const char *nvmf_keep_alive_tmo = "keep alive timeout period in seconds";
static const char *nvmf_reconnect_delay = "reconnect timeout period in seconds";
static const char *nvmf_ctrl_loss_tmo = "controller loss timeout period in seconds";
static const char *nvmf_tos = "type of service";
static const char *nvmf_keyring = "Keyring for TLS key lookup";
static const char *nvmf_tls_key = "TLS key to use";
static const char *nvmf_dup_connect = "allow duplicate connections between same transport host and subsystem port";
static const char *nvmf_disable_sqflow = "disable controller sq flow control (default false)";
static const char *nvmf_hdr_digest = "enable transport protocol header digest (TCP transport)";
static const char *nvmf_data_digest = "enable transport protocol data digest (TCP transport)";
static const char *nvmf_tls = "enable TLS";
static const char *nvmf_config_file = "Use specified JSON configuration file or 'none' to disable";
#define NVMF_ARGS(n, c, ...) \
struct argconfig_commandline_options opts[] = { \
OPT_STRING("transport", 't', "STR", &transport, nvmf_tport), \
OPT_STRING("nqn", 'n', "STR", &subsysnqn, nvmf_nqn), \
OPT_STRING("traddr", 'a', "STR", &traddr, nvmf_traddr), \
OPT_STRING("trsvcid", 's', "STR", &trsvcid, nvmf_trsvcid), \
OPT_STRING("host-traddr", 'w', "STR", &c.host_traddr, nvmf_htraddr), \
OPT_STRING("host-iface", 'f', "STR", &c.host_iface, nvmf_hiface), \
OPT_STRING("hostnqn", 'q', "STR", &hostnqn, nvmf_hostnqn), \
OPT_STRING("hostid", 'I', "STR", &hostid, nvmf_hostid), \
OPT_STRING("dhchap-secret", 'S', "STR", &hostkey, nvmf_hostkey), \
OPT_INT("nr-io-queues", 'i', &c.nr_io_queues, nvmf_nr_io_queues), \
OPT_INT("nr-write-queues", 'W', &c.nr_write_queues, nvmf_nr_write_queues), \
OPT_INT("nr-poll-queues", 'P', &c.nr_poll_queues, nvmf_nr_poll_queues), \
OPT_INT("queue-size", 'Q', &c.queue_size, nvmf_queue_size), \
OPT_INT("keep-alive-tmo", 'k', &c.keep_alive_tmo, nvmf_keep_alive_tmo), \
OPT_INT("reconnect-delay", 'c', &c.reconnect_delay, nvmf_reconnect_delay), \
OPT_INT("ctrl-loss-tmo", 'l', &c.ctrl_loss_tmo, nvmf_ctrl_loss_tmo), \
OPT_INT("tos", 'T', &c.tos, nvmf_tos), \
OPT_INT("keyring", 0, &c.keyring, nvmf_keyring), \
OPT_INT("tls_key", 0, &c.tls_key, nvmf_tls_key), \
OPT_FLAG("duplicate-connect", 'D', &c.duplicate_connect, nvmf_dup_connect), \
OPT_FLAG("disable-sqflow", 'd', &c.disable_sqflow, nvmf_disable_sqflow), \
OPT_FLAG("hdr-digest", 'g', &c.hdr_digest, nvmf_hdr_digest), \
OPT_FLAG("data-digest", 'G', &c.data_digest, nvmf_data_digest), \
OPT_FLAG("tls", 0, &c.tls, nvmf_tls), \
__VA_ARGS__, \
OPT_END() \
}
/*
* Compare two C strings and handle NULL pointers gracefully.
* If either of the two strings is NULL, return 0
* to let caller ignore the compare.
*/
static inline int strcmp0(const char *s1, const char *s2)
{
if (!s1 || !s2)
return 0;
return strcmp(s1, s2);
}
/*
* Compare two C strings and handle NULL pointers gracefully.
* If either of the two strings is NULL, return 0
* to let caller ignore the compare.
*/
static inline int strcasecmp0(const char *s1, const char *s2)
{
if (!s1 || !s2)
return 0;
return strcasecmp(s1, s2);
}
static bool is_persistent_discovery_ctrl(nvme_host_t h, nvme_ctrl_t c)
{
if (nvme_host_is_pdc_enabled(h, DEFAULT_PDC_ENABLED))
return nvme_ctrl_is_unique_discovery_ctrl(c);
return false;
}
static bool disc_ctrl_config_match(nvme_ctrl_t c, struct tr_config *trcfg)
{
if (nvme_ctrl_is_discovery_ctrl(c) &&
!strcmp0(nvme_ctrl_get_transport(c), trcfg->transport) &&
!strcasecmp0(nvme_ctrl_get_traddr(c), trcfg->traddr) &&
!strcmp0(nvme_ctrl_get_trsvcid(c), trcfg->trsvcid) &&
!strcmp0(nvme_ctrl_get_host_traddr(c), trcfg->host_traddr) &&
!strcmp0(nvme_ctrl_get_host_iface(c), trcfg->host_iface))
return true;
return false;
}
static bool ctrl_config_match(nvme_ctrl_t c, struct tr_config *trcfg)
{
if (!strcmp0(nvme_ctrl_get_subsysnqn(c), trcfg->subsysnqn) &&
!strcmp0(nvme_ctrl_get_transport(c), trcfg->transport) &&
!strcasecmp0(nvme_ctrl_get_traddr(c), trcfg->traddr) &&
!strcmp0(nvme_ctrl_get_trsvcid(c), trcfg->trsvcid) &&
!strcmp0(nvme_ctrl_get_host_traddr(c), trcfg->host_traddr) &&
!strcmp0(nvme_ctrl_get_host_iface(c), trcfg->host_iface))
return true;
return false;
}
static nvme_ctrl_t __lookup_ctrl(nvme_root_t r, struct tr_config *trcfg,
bool (*filter)(nvme_ctrl_t, struct tr_config *))
{
nvme_host_t h;
nvme_subsystem_t s;
nvme_ctrl_t c;
nvme_for_each_host(r, h) {
nvme_for_each_subsystem(h, s) {
nvme_subsystem_for_each_ctrl(s, c) {
if (!(filter(c, trcfg)))
continue;
return c;
}
}
}
return NULL;
}
static nvme_ctrl_t lookup_discovery_ctrl(nvme_root_t r, struct tr_config *trcfg)
{
return __lookup_ctrl(r, trcfg, disc_ctrl_config_match);
}
nvme_ctrl_t lookup_ctrl(nvme_root_t r, struct tr_config *trcfg)
{
return __lookup_ctrl(r, trcfg, ctrl_config_match);
}
static int set_discovery_kato(struct nvme_fabrics_config *cfg)
{
int tmo = cfg->keep_alive_tmo;
/* Set kato to NVMF_DEF_DISC_TMO for persistent controllers */
if (persistent && !cfg->keep_alive_tmo)
cfg->keep_alive_tmo = NVMF_DEF_DISC_TMO;
/* Set kato to zero for non-persistent controllers */
else if (!persistent && (cfg->keep_alive_tmo > 0))
cfg->keep_alive_tmo = 0;
return tmo;
}
static nvme_ctrl_t __create_discover_ctrl(nvme_root_t r, nvme_host_t h,
struct nvme_fabrics_config *cfg,
struct tr_config *trcfg)
{
nvme_ctrl_t c;
int tmo, ret;
c = nvme_create_ctrl(r, trcfg->subsysnqn, trcfg->transport,
trcfg->traddr, trcfg->host_traddr,
trcfg->host_iface, trcfg->trsvcid);
if (!c)
return NULL;
nvme_ctrl_set_discovery_ctrl(c, true);
nvme_ctrl_set_unique_discovery_ctrl(c,
strcmp(trcfg->subsysnqn, NVME_DISC_SUBSYS_NAME));
tmo = set_discovery_kato(cfg);
errno = 0;
ret = nvmf_add_ctrl(h, c, cfg);
cfg->keep_alive_tmo = tmo;
if (ret) {
nvme_free_ctrl(c);
return NULL;
}
return c;
}
static nvme_ctrl_t create_discover_ctrl(nvme_root_t r, nvme_host_t h,
struct nvme_fabrics_config *cfg,
struct tr_config *trcfg)
{
nvme_ctrl_t c;
c = __create_discover_ctrl(r, h, cfg, trcfg);
if (!c)
return NULL;
if (nvme_ctrl_is_unique_discovery_ctrl(c))
return c;
/* Find out the name of discovery controller */
struct nvme_id_ctrl id = { 0 };
if (nvme_ctrl_identify(c, &id)) {
fprintf(stderr, "failed to identify controller, error %s\n",
nvme_strerror(errno));
nvme_disconnect_ctrl(c);
nvme_free_ctrl(c);
return NULL;
}
if (!strcmp(id.subnqn, NVME_DISC_SUBSYS_NAME))
return c;
/*
* The subsysnqn is not the well-known name. Prefer the unique
* subsysnqn over the well-known one.
*/
nvme_disconnect_ctrl(c);
nvme_free_ctrl(c);
trcfg->subsysnqn = id.subnqn;
return __create_discover_ctrl(r, h, cfg, trcfg);
}
static void save_discovery_log(char *raw, struct nvmf_discovery_log *log)
{
uint64_t numrec = le64_to_cpu(log->numrec);
int fd, len, ret;
fd = open(raw, O_CREAT | O_RDWR | O_TRUNC, 0600);
if (fd < 0) {
fprintf(stderr, "failed to open %s: %s\n", raw, strerror(errno));
return;
}
len = sizeof(struct nvmf_discovery_log) + numrec * sizeof(struct nvmf_disc_log_entry);
ret = write(fd, log, len);
if (ret < 0)
fprintf(stderr, "failed to write to %s: %s\n",
raw, strerror(errno));
else
printf("Discovery log is saved to %s\n", raw);
close(fd);
}
static int __discover(nvme_ctrl_t c, struct nvme_fabrics_config *defcfg,
char *raw, bool connect, bool persistent,
enum nvme_print_flags flags)
{
struct nvmf_discovery_log *log = NULL;
nvme_subsystem_t s = nvme_ctrl_get_subsystem(c);
nvme_host_t h = nvme_subsystem_get_host(s);
nvme_root_t r = nvme_host_get_root(h);
uint64_t numrec;
struct nvme_get_discovery_args args = {
.c = c,
.args_size = sizeof(args),
.max_retries = MAX_DISC_RETRIES,
.result = 0,
.timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
.lsp = 0,
};
log = nvmf_get_discovery_wargs(&args);
if (!log) {
fprintf(stderr, "failed to get discovery log: %s\n",
nvme_strerror(errno));
return -errno;
}
numrec = le64_to_cpu(log->numrec);
if (raw)
save_discovery_log(raw, log);
else if (!connect) {
nvme_show_discovery_log(log, numrec, flags);
} else if (connect) {
int i;
for (i = 0; i < numrec; i++) {
struct nvmf_disc_log_entry *e = &log->entries[i];
nvme_ctrl_t cl;
bool discover = false;
bool disconnect;
nvme_ctrl_t child;
int tmo = defcfg->keep_alive_tmo;
struct tr_config trcfg = {
.subsysnqn = e->subnqn,
.transport = nvmf_trtype_str(e->trtype),
.traddr = e->traddr,
.host_traddr = defcfg->host_traddr,
.host_iface = defcfg->host_iface,
.trsvcid = e->trsvcid,
};
/* Already connected ? */
cl = lookup_ctrl(r, &trcfg);
if (cl && nvme_ctrl_get_name(cl))
continue;
/* Skip connect if the transport types don't match */
if (strcmp(nvme_ctrl_get_transport(c),
nvmf_trtype_str(e->trtype)))
continue;
if (e->subtype == NVME_NQN_DISC ||
e->subtype == NVME_NQN_CURR) {
__u16 eflags = le16_to_cpu(e->eflags);
/*
* Does this discovery controller return the
* same information?
*/
if (eflags & NVMF_DISC_EFLAGS_DUPRETINFO)
continue;
/* Are we supposed to keep the discovery controller around? */
disconnect = !persistent;
if (strcmp(e->subnqn, NVME_DISC_SUBSYS_NAME)) {
/*
* Does this discovery controller doesn't
* support explicit persistent connection?
*/
if (!(eflags & NVMF_DISC_EFLAGS_EPCSD))
disconnect = true;
else
disconnect = false;
}
set_discovery_kato(defcfg);
} else {
/* NVME_NQN_NVME */
disconnect = false;
}
errno = 0;
child = nvmf_connect_disc_entry(h, e, defcfg,
&discover);
defcfg->keep_alive_tmo = tmo;
if (child) {
if (discover)
__discover(child, defcfg, raw,
true, persistent, flags);
if (disconnect) {
nvme_disconnect_ctrl(child);
nvme_free_ctrl(child);
}
} else if (errno == ENVME_CONNECT_ALREADY && !quiet) {
char *traddr = log->entries[i].traddr;
fprintf(stderr,
"traddr=%s is already connected\n",
traddr);
}
}
}
free(log);
return 0;
}
static char *get_default_trsvcid(const char *transport,
bool discovery_ctrl)
{
if (!transport)
return NULL;
if (!strcmp(transport, "tcp")) {
if (discovery_ctrl)
/* Default port for NVMe/TCP discovery controllers */
return stringify(NVME_DISC_IP_PORT);
/* Default port for NVMe/TCP io controllers */
return stringify(NVME_RDMA_IP_PORT);
} else if (!strcmp(transport, "rdma")) {
/* Default port for NVMe/RDMA controllers */
return stringify(NVME_RDMA_IP_PORT);
}
return NULL;
}
static int discover_from_conf_file(nvme_root_t r, nvme_host_t h,
const char *desc, bool connect,
const struct nvme_fabrics_config *defcfg)
{
char *transport = NULL, *traddr = NULL, *trsvcid = NULL;
char *hostnqn = NULL, *hostid = NULL, *hostkey = NULL;
char *subsysnqn = NULL;
char *ptr, **argv, *p, line[4096];
int argc, ret = 0;
unsigned int verbose = 0;
FILE *f;
enum nvme_print_flags flags;
char *format = "normal";
struct nvme_fabrics_config cfg;
bool force = false;
NVMF_ARGS(opts, cfg,
OPT_FMT("output-format", 'o', &format, output_format),
OPT_FILE("raw", 'r', &raw, "save raw output to file"),
OPT_FLAG("persistent", 'p', &persistent, "persistent discovery connection"),
OPT_FLAG("quiet", 'S', &quiet, "suppress already connected errors"),
OPT_INCR("verbose", 'v', &verbose, "Increase logging verbosity"),
OPT_FLAG("force", 0, &force, "Force persistent discovery controller creation"));
nvmf_default_config(&cfg);
ret = flags = validate_output_format(format);
if (ret < 0)
return ret;
f = fopen(PATH_NVMF_DISC, "r");
if (f == NULL) {
fprintf(stderr, "No params given and no %s\n", PATH_NVMF_DISC);
errno = ENOENT;
return -1;
}
argv = calloc(MAX_DISC_ARGS, sizeof(char *));
if (!argv) {
ret = -1;
goto out;
}
argv[0] = "discover";
memset(line, 0, sizeof(line));
while (fgets(line, sizeof(line), f) != NULL) {
nvme_ctrl_t c;
if (line[0] == '#' || line[0] == '\n')
continue;
argc = 1;
p = line;
while ((ptr = strsep(&p, " =\n")) != NULL)
argv[argc++] = ptr;
argv[argc] = NULL;
memcpy(&cfg, defcfg, sizeof(cfg));
subsysnqn = NVME_DISC_SUBSYS_NAME;
ret = argconfig_parse(argc, argv, desc, opts);
if (ret)
goto next;
if (!transport && !traddr)
goto next;
if (!trsvcid)
trsvcid = get_default_trsvcid(transport, true);
struct tr_config trcfg = {
.subsysnqn = subsysnqn,
.transport = transport,
.traddr = traddr,
.host_traddr = cfg.host_traddr,
.host_iface = cfg.host_iface,
.trsvcid = trsvcid,
};
if (!force) {
c = lookup_discovery_ctrl(r, &trcfg);
if (c) {
__discover(c, &cfg, raw, connect,
true, flags);
goto next;
}
}
c = create_discover_ctrl(r, h, &cfg, &trcfg);
if (!c)
goto next;
__discover(c, &cfg, raw, connect, persistent, flags);
if (!(persistent || is_persistent_discovery_ctrl(h, c)))
ret = nvme_disconnect_ctrl(c);
nvme_free_ctrl(c);
next:
memset(&cfg, 0, sizeof(cfg));
}
free(argv);
out:
fclose(f);
return ret;
}
static int discover_from_json_config_file(nvme_root_t r, nvme_host_t h,
const char *desc, bool connect,
const struct nvme_fabrics_config *defcfg,
enum nvme_print_flags flags,
bool force)
{
const char *transport, *traddr, *host_traddr, *host_iface, *trsvcid, *subsysnqn;
nvme_subsystem_t s;
nvme_ctrl_t c, cn;
struct nvme_fabrics_config cfg;
int ret = 0;
nvme_for_each_subsystem(h, s) {
nvme_subsystem_for_each_ctrl(s, c) {
transport = nvme_ctrl_get_transport(c);
traddr = nvme_ctrl_get_traddr(c);
host_traddr = nvme_ctrl_get_host_traddr(c);
host_iface = nvme_ctrl_get_host_iface(c);
if (!transport && !traddr)
continue;
/* ignore none fabric transports */
if (strcmp(transport, "tcp") &&
strcmp(transport, "rdma") &&
strcmp(transport, "fc"))
continue;
/* ignore if no host_traddr for fc */
if (!strcmp(transport, "fc")) {
if (!host_traddr) {
fprintf(stderr, "host_traddr required for fc\n");
continue;
}
}
/* ignore if host_iface set for any transport other than tcp */
if (!strcmp(transport, "rdma") || !strcmp(transport, "fc")) {
if (host_iface) {
fprintf(stderr, "host_iface not permitted for rdma or fc\n");
continue;
}
}
trsvcid = nvme_ctrl_get_trsvcid(c);
if (!trsvcid || !strcmp(trsvcid, ""))
trsvcid = get_default_trsvcid(transport, true);
if (force)
subsysnqn = nvme_ctrl_get_subsysnqn(c);
else
subsysnqn = NVME_DISC_SUBSYS_NAME;
if (nvme_ctrl_is_persistent(c))
persistent = true;
memcpy(&cfg, defcfg, sizeof(cfg));
struct tr_config trcfg = {
.subsysnqn = subsysnqn,
.transport = transport,
.traddr = traddr,
.host_traddr = host_traddr,
.host_iface = host_iface,
.trsvcid = trsvcid,
};
if (!force) {
cn = lookup_discovery_ctrl(r, &trcfg);
if (cn) {
__discover(cn, &cfg, raw, connect,
true, flags);
continue;
}
}
cn = create_discover_ctrl(r, h, &cfg, &trcfg);
if (!cn)
continue;
__discover(cn, &cfg, raw, connect, persistent, flags);
if (!(persistent || is_persistent_discovery_ctrl(h, cn)))
ret = nvme_disconnect_ctrl(cn);
nvme_free_ctrl(cn);
}
}
return ret;
}
int nvmf_discover(const char *desc, int argc, char **argv, bool connect)
{
char *subsysnqn = NVME_DISC_SUBSYS_NAME;
char *hostnqn = NULL, *hostid = NULL, *hostkey = NULL;
char *hostnqn_arg, *hostid_arg;
char *transport = NULL, *traddr = NULL, *trsvcid = NULL;
char *config_file = PATH_NVMF_CONFIG;
char *hnqn = NULL, *hid = NULL;
enum nvme_print_flags flags;
nvme_root_t r;
nvme_host_t h;
nvme_ctrl_t c = NULL;
unsigned int verbose = 0;
int ret;
char *format = "normal";
struct nvme_fabrics_config cfg;
char *device = NULL;
bool force = false;
bool json_config = false;
bool nbft = false, nonbft = false;
char *nbft_path = NBFT_SYSFS_PATH;
NVMF_ARGS(opts, cfg,
OPT_STRING("device", 'd', "DEV", &device, "use existing discovery controller device"),
OPT_FMT("output-format", 'o', &format, output_format),
OPT_FILE("raw", 'r', &raw, "save raw output to file"),
OPT_FLAG("persistent", 'p', &persistent, "persistent discovery connection"),
OPT_FLAG("quiet", 'S', &quiet, "suppress already connected errors"),
OPT_STRING("config", 'J', "FILE", &config_file, nvmf_config_file),
OPT_INCR("verbose", 'v', &verbose, "Increase logging verbosity"),
OPT_FLAG("dump-config", 'O', &dump_config, "Dump configuration file to stdout"),
OPT_FLAG("force", 0, &force, "Force persistent discovery controller creation"),
OPT_FLAG("nbft", 0, &nbft, "Only look at NBFT tables"),
OPT_FLAG("no-nbft", 0, &nonbft, "Do not look at NBFT tables"),
OPT_STRING("nbft-path", 0, "STR", &nbft_path, "user-defined path for NBFT tables"));
nvmf_default_config(&cfg);
ret = argconfig_parse(argc, argv, desc, opts);
if (ret)
return ret;
ret = flags = validate_output_format(format);
if (ret < 0)
return ret;
if (!strcmp(config_file, "none"))
config_file = NULL;
r = nvme_create_root(stderr, map_log_level(verbose, quiet));
if (!r) {
fprintf(stderr, "Failed to create topology root: %s\n",
nvme_strerror(errno));
return -errno;
}
ret = nvme_scan_topology(r, NULL, NULL);
if (ret < 0) {
fprintf(stderr, "Failed to scan topology: %s\n",
nvme_strerror(errno));
nvme_free_tree(r);
return ret;
}
if (!nvme_read_config(r, config_file))
json_config = true;
hostnqn_arg = hostnqn;
hostid_arg = hostid;
if (!hostnqn)
hostnqn = hnqn = nvmf_hostnqn_from_file();
if (!hostnqn)
hostnqn = hnqn = nvmf_hostnqn_generate();
if (!hostid)
hostid = hid = nvmf_hostid_from_file();
h = nvme_lookup_host(r, hostnqn, hostid);
if (!h) {
ret = ENOMEM;
goto out_free;
}
if (device) {
if (!strcmp(device, "none"))
device = NULL;
else if (!strncmp(device, "/dev/", 5))
device += 5;
}
if (hostkey)
nvme_host_set_dhchap_key(h, hostkey);
if (!device && !transport && !traddr) {
if (!nonbft)
discover_from_nbft(r, hostnqn_arg, hostid_arg,
hostnqn, hostid, desc, connect,
&cfg, nbft_path, flags, verbose);
if (nbft)
goto out_free;
if (json_config)
ret = discover_from_json_config_file(r, h, desc,
connect, &cfg,
flags, force);
if (ret || access(PATH_NVMF_DISC, F_OK))
goto out_free;
ret = discover_from_conf_file(r, h, desc, connect, &cfg);
goto out_free;
}
if (!trsvcid)
trsvcid = get_default_trsvcid(transport, true);
struct tr_config trcfg = {
.subsysnqn = subsysnqn,
.transport = transport,
.traddr = traddr,
.host_traddr = cfg.host_traddr,
.host_iface = cfg.host_iface,
.trsvcid = trsvcid,
};
if (device && !force) {
c = nvme_scan_ctrl(r, device);
if (c) {
/* Check if device matches command-line options */
if (!ctrl_config_match(c, &trcfg)) {
fprintf(stderr,
"ctrl device %s found, ignoring non matching command-line options\n",
device);
}
if (!nvme_ctrl_is_discovery_ctrl(c)) {
fprintf(stderr,
"ctrl device %s found, ignoring non discovery controller\n",
device);
nvme_free_ctrl(c);
c = NULL;
persistent = false;
} else {
/*
* If the controller device is found it must
* be persistent, and shouldn't be disconnected
* on exit.
*/
persistent = true;
/*
* When --host-traddr/--host-iface are not specified on the
* command line, use the discovery controller's (c) host-
* traddr/host-iface for the connections to controllers
* returned in the Discovery Log Pages. This is essential
* when invoking "connect-all" with --device to reuse an
* existing persistent discovery controller (as is done
* for the udev rules). This ensures that host-traddr/
* host-iface are consistent with the discovery controller (c).
*/
if (!cfg.host_traddr)
cfg.host_traddr = (char *)nvme_ctrl_get_host_traddr(c);
if (!cfg.host_iface)
cfg.host_iface = (char *)nvme_ctrl_get_host_iface(c);
}
} else {
/*
* No controller found, fall back to create one.
* But that controller cannot be persistent.
*/
fprintf(stderr,
"ctrl device %s not found%s\n", device,
persistent ? ", ignoring --persistent" : "");
persistent = false;
}
}
if (!c && !force) {
c = lookup_discovery_ctrl(r, &trcfg);
if (c)
persistent = true;
}
if (!c) {
/* No device or non-matching device, create a new controller */
c = create_discover_ctrl(r, h, &cfg, &trcfg);
if (!c) {
fprintf(stderr,
"failed to add controller, error %s\n",
nvme_strerror(errno));
ret = errno;
goto out_free;
}
}
ret = __discover(c, &cfg, raw, connect, persistent, flags);
if (!(persistent || is_persistent_discovery_ctrl(h, c)))
nvme_disconnect_ctrl(c);
nvme_free_ctrl(c);
out_free:
free(hnqn);
free(hid);
if (dump_config)
nvme_dump_config(r);
nvme_free_tree(r);
return ret;
}
int nvmf_connect(const char *desc, int argc, char **argv)
{
char *subsysnqn = NULL;
char *transport = NULL, *traddr = NULL;
char *trsvcid = NULL, *hostnqn = NULL, *hostid = NULL;
char *hostkey = NULL, *ctrlkey = NULL;
char *hnqn = NULL, *hid = NULL;
char *config_file = PATH_NVMF_CONFIG;
unsigned int verbose = 0;
nvme_root_t r;
nvme_host_t h;
nvme_ctrl_t c;
int ret;
struct nvme_fabrics_config cfg;
enum nvme_print_flags flags = -1;
char *format = "";
NVMF_ARGS(opts, cfg,
OPT_STRING("dhchap-ctrl-secret", 'C', "STR", &ctrlkey, nvmf_ctrlkey),
OPT_STRING("config", 'J', "FILE", &config_file, nvmf_config_file),
OPT_INCR("verbose", 'v', &verbose, "Increase logging verbosity"),
OPT_FLAG("dump-config", 'O', &dump_config, "Dump JSON configuration to stdout"),
OPT_FMT("output-format", 'o', &format, "Output format: normal|json"));
nvmf_default_config(&cfg);
ret = argconfig_parse(argc, argv, desc, opts);
if (ret)
return ret;
if (!strcmp(format, ""))
flags = -1;
else if (!strcmp(format, "normal"))
flags = NORMAL;
else if (!strcmp(format, "json"))
flags = JSON;
else
return -EINVAL;
if (!subsysnqn) {
fprintf(stderr,
"required argument [--nqn | -n] not specified\n");
return -EINVAL;
}
if (!transport) {
fprintf(stderr,
"required argument [--transport | -t] not specified\n");
return -EINVAL;
}
if (strcmp(transport, "loop")) {
if (!traddr) {
fprintf(stderr,
"required argument [--traddr | -a] not specified for transport %s\n",
transport);
return -EINVAL;
}
}
if (!strcmp(subsysnqn, NVME_DISC_SUBSYS_NAME)) {
fprintf(stderr,
"avoiding connect to %s, use nvme discover instead\n",
NVME_DISC_SUBSYS_NAME);
return -EINVAL;
}
if (!strcmp(config_file, "none"))
config_file = NULL;
r = nvme_create_root(stderr, map_log_level(verbose, quiet));
if (!r) {
fprintf(stderr, "Failed to create topology root: %s\n",
nvme_strerror(errno));
return -errno;
}
ret = nvme_scan_topology(r, NULL, NULL);
if (ret < 0) {
fprintf(stderr, "Failed to scan topology: %s\n",
nvme_strerror(errno));
nvme_free_tree(r);
return ret;
}
nvme_read_config(r, config_file);
if (!hostnqn)
hostnqn = hnqn = nvmf_hostnqn_from_file();
if (!hostnqn)
hostnqn = hnqn = nvmf_hostnqn_generate();
if (!hostid)
hostid = hid = nvmf_hostid_from_file();
h = nvme_lookup_host(r, hostnqn, hostid);
if (!h) {
errno = ENOMEM;
goto out_free;
}
if (hostkey)
nvme_host_set_dhchap_key(h, hostkey);
if (!trsvcid)
trsvcid = get_default_trsvcid(transport, false);
struct tr_config trcfg = {
.subsysnqn = subsysnqn,
.transport = transport,
.traddr = traddr,
.host_traddr = cfg.host_traddr,
.host_iface = cfg.host_iface,
.trsvcid = trsvcid,
};
c = lookup_ctrl(r, &trcfg);
if (c && nvme_ctrl_get_name(c)) {
fprintf(stderr, "already connected\n");
errno = EALREADY;
goto out_free;
}
c = nvme_create_ctrl(r, subsysnqn, transport, traddr,
cfg.host_traddr, cfg.host_iface, trsvcid);
if (!c) {
errno = ENOMEM;
goto out_free;
}
if (ctrlkey)
nvme_ctrl_set_dhchap_key(c, ctrlkey);
errno = 0;
ret = nvmf_add_ctrl(h, c, &cfg);
if (ret)
fprintf(stderr, "could not add new controller: %s\n",
nvme_strerror(errno));
else {
errno = 0;
nvme_show_connect_msg(c, flags);
}
out_free:
free(hnqn);
free(hid);
if (dump_config)
nvme_dump_config(r);
nvme_free_tree(r);
return -errno;
}
static nvme_ctrl_t lookup_nvme_ctrl(nvme_root_t r, const char *name)
{
nvme_host_t h;
nvme_subsystem_t s;
nvme_ctrl_t c;
nvme_for_each_host(r, h) {
nvme_for_each_subsystem(h, s) {
nvme_subsystem_for_each_ctrl(s, c) {
if (!strcmp(nvme_ctrl_get_name(c), name))