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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>
* Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <dirent.h>
#include <libgen.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include "filters.h"
#include "types.h"
#include "util.h"
#include "cleanup.h"
#define PATH_SYSFS_NVME "/sys/class/nvme"
#define PATH_SYSFS_NVME_SUBSYSTEM "/sys/class/nvme-subsystem"
#define PATH_SYSFS_BLOCK "/sys/block"
char *nvme_ctrl_sysfs_dir(void)
{
char *basepath = getenv("LIBNVME_SYSFS_PATH");
char *str;
if (!basepath)
return strdup(PATH_SYSFS_NVME);
if (!asprintf(&str, "%s" PATH_SYSFS_NVME, basepath))
return NULL;
return str;
}
char *nvme_ns_sysfs_dir(void)
{
char *basepath = getenv("LIBNVME_SYSFS_PATH");
char *str;
if (!basepath)
return strdup(PATH_SYSFS_BLOCK);
if (!asprintf(&str, "%s" PATH_SYSFS_BLOCK, basepath))
return NULL;
return str;
}
char *nvme_subsys_sysfs_dir(void)
{
char *basepath = getenv("LIBNVME_SYSFS_PATH");
char *str;
if (!basepath)
return strdup(PATH_SYSFS_NVME_SUBSYSTEM);
if (!asprintf(&str, "%s" PATH_SYSFS_NVME_SUBSYSTEM, basepath))
return NULL;
return str;
}
int nvme_namespace_filter(const struct dirent *d)
{
int i, n;
if (d->d_name[0] == '.')
return 0;
if (strstr(d->d_name, "nvme"))
if (sscanf(d->d_name, "nvme%dn%d", &i, &n) == 2)
return 1;
return 0;
}
int nvme_paths_filter(const struct dirent *d)
{
int i, c, n;
if (d->d_name[0] == '.')
return 0;
if (strstr(d->d_name, "nvme"))
if (sscanf(d->d_name, "nvme%dc%dn%d", &i, &c, &n) == 3)
return 1;
return 0;
}
int nvme_ctrls_filter(const struct dirent *d)
{
int i, c, n;
if (d->d_name[0] == '.')
return 0;
if (strstr(d->d_name, "nvme")) {
if (sscanf(d->d_name, "nvme%dc%dn%d", &i, &c, &n) == 3)
return 0;
if (sscanf(d->d_name, "nvme%dn%d", &i, &n) == 2)
return 0;
if (sscanf(d->d_name, "nvme%d", &i) == 1)
return 1;
}
return 0;
}
int nvme_subsys_filter(const struct dirent *d)
{
int i;
if (d->d_name[0] == '.')
return 0;
if (strstr(d->d_name, "nvme-subsys"))
if (sscanf(d->d_name, "nvme-subsys%d", &i) == 1)
return 1;
return 0;
}
int nvme_scan_subsystems(struct dirent ***subsys)
{
_cleanup_free_ char *dir = nvme_subsys_sysfs_dir();
return scandir(dir, subsys, nvme_subsys_filter, alphasort);
}
int nvme_scan_subsystem_namespaces(nvme_subsystem_t s, struct dirent ***ns)
{
return scandir(nvme_subsystem_get_sysfs_dir(s), ns,
nvme_namespace_filter, alphasort);
}
int nvme_scan_ctrls(struct dirent ***ctrls)
{
_cleanup_free_ char *dir = nvme_ctrl_sysfs_dir();
return scandir(dir, ctrls, nvme_ctrls_filter, alphasort);
}
int nvme_scan_ctrl_namespace_paths(nvme_ctrl_t c, struct dirent ***paths)
{
return scandir(nvme_ctrl_get_sysfs_dir(c), paths,
nvme_paths_filter, alphasort);
}
int nvme_scan_ctrl_namespaces(nvme_ctrl_t c, struct dirent ***ns)
{
return scandir(nvme_ctrl_get_sysfs_dir(c), ns,
nvme_namespace_filter, alphasort);
}
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