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// SPDX-License-Identifier: GPL-2.0-or-later
#include <errno.h>
#include <stdio.h>
#include <fnmatch.h>
#include <stdlib.h>
#include <libnvme.h>
#include "nvme.h"
#include "nbft.h"
#include "fabrics.h"
#include "nvme-print.h"
#include "util/types.h"
#define NBFT_SYSFS_FILENAME "NBFT*"
static void print_connect_msg(nvme_ctrl_t c)
{
printf("device: %s\n", nvme_ctrl_get_name(c));
}
static void json_connect_msg(nvme_ctrl_t c)
{
#ifdef CONFIG_JSONC
struct json_object *root;
root = json_create_object();
json_object_add_value_string(root, "device", nvme_ctrl_get_name(c));
json_print_object(root, NULL);
printf("\n");
json_free_object(root);
#endif
}
int nbft_filter(const struct dirent *dent)
{
return !fnmatch(NBFT_SYSFS_FILENAME, dent->d_name, FNM_PATHNAME);
}
int read_nbft_files(struct list_head *nbft_list, char *path)
{
struct dirent **dent;
char filename[PATH_MAX];
int i, count, ret;
struct nbft_file_entry *entry;
struct nbft_info *nbft;
count = scandir(path, &dent, nbft_filter, NULL);
if (count < 0)
return -errno;
for (i = 0; i < count; i++) {
snprintf(filename, sizeof(filename), "%s/%s", path, dent[i]->d_name);
ret = nvme_nbft_read(&nbft, filename);
if (!ret) {
entry = calloc(1, sizeof(*entry));
entry->nbft = nbft;
list_add_tail(nbft_list, &entry->node);
}
free(dent[i]);
}
free(dent);
return 0;
}
void free_nbfts(struct list_head *nbft_list)
{
struct nbft_file_entry *entry;
while ((entry = list_pop(nbft_list, struct nbft_file_entry, node))) {
nvme_nbft_free(entry->nbft);
free(entry);
}
}
int discover_from_nbft(nvme_root_t r, char *hostnqn_arg, char *hostid_arg,
char *hostnqn_sys, char *hostid_sys,
const char *desc, bool connect,
const struct nvme_fabrics_config *cfg, char *nbft_path,
enum nvme_print_flags flags, bool verbose)
{
char *hostnqn = NULL, *hostid = NULL, *host_traddr = NULL;
nvme_host_t h;
nvme_ctrl_t c;
int ret, i;
struct list_head nbft_list;
struct nbft_file_entry *entry;
struct nbft_info_subsystem_ns **ss;
struct nbft_info_hfi *hfi;
if (!connect)
/* to do: print discovery-type info from NBFT tables */
return 0;
list_head_init(&nbft_list);
ret = read_nbft_files(&nbft_list, nbft_path);
if (ret) {
if (ret != ENOENT)
nvme_show_perror("Failed to access ACPI tables directory");
goto out_free_2;
}
list_for_each(&nbft_list, entry, node)
for (ss = entry->nbft->subsystem_ns_list; ss && *ss; ss++)
for (i = 0; i < (*ss)->num_hfis; i++) {
nvme_ctrl_t cl;
hfi = (*ss)->hfis[i];
if (hostnqn_arg)
hostnqn = hostnqn_arg;
else {
hostnqn = entry->nbft->host.nqn;
if (!hostnqn)
hostnqn = hostnqn_sys;
}
if (hostid_arg)
hostid = hostid_arg;
else if (*entry->nbft->host.id) {
hostid = (char *)util_uuid_to_string(entry->nbft->host.id);
if (!hostid)
hostid = hostid_sys;
}
h = nvme_lookup_host(r, hostnqn, hostid);
if (!h) {
errno = ENOMEM;
goto out_free;
}
if (!cfg->host_traddr) {
host_traddr = NULL;
if (!strncmp((*ss)->transport, "tcp", 3))
host_traddr = hfi->tcp_info.ipaddr;
}
struct tr_config trcfg = {
.subsysnqn = (*ss)->subsys_nqn,
.transport = (*ss)->transport,
.traddr = (*ss)->traddr,
.host_traddr = host_traddr,
.host_iface = NULL,
.trsvcid = (*ss)->trsvcid,
};
/* Already connected ? */
cl = lookup_ctrl(h, &trcfg);
if (cl && nvme_ctrl_get_name(cl))
continue;
c = nvme_create_ctrl(r, (*ss)->subsys_nqn, (*ss)->transport,
(*ss)->traddr, host_traddr, NULL,
(*ss)->trsvcid);
if (!c) {
errno = ENOMEM;
goto out_free;
}
errno = 0;
ret = nvmf_add_ctrl(h, c, cfg);
/*
* With TCP/DHCP, it can happen that the OS
* obtains a different local IP address than the
* firmware had. Retry without host_traddr.
*/
if (ret == -1 && errno == ENVME_CONNECT_ADDRNOTAVAIL &&
!strcmp((*ss)->transport, "tcp") &&
strlen(hfi->tcp_info.dhcp_server_ipaddr) > 0) {
nvme_free_ctrl(c);
trcfg.host_traddr = NULL;
cl = lookup_ctrl(h, &trcfg);
if (cl && nvme_ctrl_get_name(cl))
continue;
c = nvme_create_ctrl(r, (*ss)->subsys_nqn, (*ss)->transport,
(*ss)->traddr,
NULL, NULL, (*ss)->trsvcid);
if (!c) {
errno = ENOMEM;
goto out_free;
}
errno = 0;
ret = nvmf_add_ctrl(h, c, cfg);
if (ret == 0 && verbose >= 1)
fprintf(stderr,
"connect with host_traddr=\"%s\" failed, success after omitting host_traddr\n",
host_traddr);
}
if (ret)
fprintf(stderr, "no controller found\n");
else {
if (flags == NORMAL)
print_connect_msg(c);
else if (flags == JSON)
json_connect_msg(c);
}
out_free:
if (errno == ENOMEM)
goto out_free_2;
}
out_free_2:
free_nbfts(&nbft_list);
return errno;
}
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