Merging upstream version 2.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 801 deletions

diff --git a/nvme-topology.c b/nvme-topology.c
deleted file mode 100644
index 0a22f6b..0000000
--- a/nvme-topology.c
+++ /dev/null
@@ -1,801 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-
-#include "nvme.h"
-#include "nvme-ioctl.h"
-
-#ifdef HAVE_SYSTEMD
-#include <systemd/sd-id128.h>
-#define NVME_HOSTNQN_ID SD_ID128_MAKE(c7,f4,61,81,12,be,49,32,8c,83,10,6f,9d,dd,d8,6b)
-#endif
-
-static const char *dev = "/dev/";
-static const char *subsys_dir = "/sys/class/nvme-subsystem/";
-static void free_ctrl(struct nvme_ctrl *c);
-
-char *get_nvme_subsnqn(char *path)
-{
-	char sspath[320], *subsysnqn;
-	int fd, ret;
-
-	snprintf(sspath, sizeof(sspath), "%s/subsysnqn", path);
-
-	fd = open(sspath, O_RDONLY);
-	if (fd < 0) {
-		fprintf(stderr, "Failed to open %s: %s\n",
-				sspath, strerror(errno));
-		return NULL;
-	}
-
-	subsysnqn = calloc(1, 256);
-	if (!subsysnqn)
-		goto close_fd;
-
-	ret = read(fd, subsysnqn, 256);
-	if (ret < 0) {
-		fprintf(stderr, "Failed to read %s: %s\n", sspath,
-				strerror(errno));
-		free(subsysnqn);
-		subsysnqn = NULL;
-	} else if (subsysnqn[strlen(subsysnqn) - 1] == '\n') {
-		subsysnqn[strlen(subsysnqn) - 1] = '\0';
-	}
-
-close_fd:
-	close(fd);
-	return subsysnqn;
-}
-
-char *nvme_get_ctrl_attr(const char *path, const char *attr)
-{
-	char *attrpath, *value;
-	ssize_t ret;
-	int fd, i;
-
-	ret = asprintf(&attrpath, "%s/%s", path, attr);
-	if (ret < 0)
-		return NULL;
-
-	value = calloc(1, 1024);
-	if (!value)
-		goto err_free_path;
-
-	fd = open(attrpath, O_RDONLY);
-	if (fd < 0)
-		goto err_free_value;
-
-	ret = read(fd, value, 1024);
-	if (ret < 0) {
-		fprintf(stderr, "read :%s :%s\n", attrpath, strerror(errno));
-		goto err_close_fd;
-	}
-
-	if (value[strlen(value) - 1] == '\n')
-		value[strlen(value) - 1] = '\0';
-
-	for (i = 0; i < strlen(value); i++) {
-		if (value[i] == ',' )
-			value[i] = ' ';
-	}
-
-	close(fd);
-	free(attrpath);
-	return value;
-err_close_fd:
-	close(fd);
-err_free_value:
-	free(value);
-err_free_path:
-	free(attrpath);
-	return NULL;
-}
-
-static char *path_trim_last(char *path, char needle)
-{
-	int i;
-	i = strlen(path);
-	if (i>0 && path[i-1] == needle)		// remove trailing slash
-		path[--i] = 0;
-	for (; i>0; i--)
-		if (path[i] == needle) {
-			path[i] = 0;
-			return path+i+1;
-	}
-	return NULL;
-}
-
-static void legacy_get_pci_bdf(char *node, char *bdf)
-{
-	int ret;
-	char path[264], nodetmp[264];
-	struct stat st;
-	char *p, *__path = path;
-
-	bdf[0] = 0;
-	strcpy(nodetmp, node);
-	p = path_trim_last(nodetmp, '/');
-	sprintf(path, "/sys/block/%s/device", p);
-	ret = readlink(path, nodetmp, sizeof(nodetmp));
-	if (ret <= 0)
-		return;
-	nodetmp[ret] = 0;
-	/* The link value is either "device -> ../../../0000:86:00.0" or "device -> ../../nvme0" */
-	(void) path_trim_last(path, '/');
-	sprintf(path+strlen(path), "/%s/device", nodetmp);
-	ret = stat(path, &st);
-	if (ret < 0)
-		return;
-	if ((st.st_mode & S_IFLNK) == 0) {
-		/* follow the second link to get the PCI address */
-		ret = readlink(path, __path, sizeof(path));
-		if (ret <= 0)
-			return;
-		path[ret] = 0;
-	}
-	else
-		(void) path_trim_last(path, '/');
-
-	p = path_trim_last(path, '/');
-	if (p && strlen(p) == 12)
-		strcpy(bdf, p);
-}
-
-static int scan_namespace(struct nvme_namespace *n)
-{
-	int ret, fd;
-	char *path;
-
-	ret = asprintf(&path, "%s%s", n->ctrl->path, n->name);
-	if (ret < 0)
-		return ret;
-
-	fd = open(path, O_RDONLY);
-	if (fd < 0) {
-		ret = fd;
-		goto free;
-	}
-	if (!n->nsid) {
-		ret = nvme_get_nsid(fd);
-		if (ret < 0)
-			goto close_fd;
-		n->nsid = ret;
-	}
-
-	ret = nvme_identify_ns(fd, n->nsid, 0, &n->ns);
-close_fd:
-	close(fd);
-free:
-	free(path);
-	return ret;
-}
-
-static char *get_nvme_ctrl_path_ana_state(char *path, int nsid)
-{
-	struct dirent **paths;
-	char *ana_state;
-	int i, n;
-
-	ana_state = calloc(1, 16);
-	if (!ana_state)
-		return NULL;
-
-	n = scandir(path, &paths, scan_ctrl_paths_filter, alphasort);
-	if (n <= 0) {
-		free(ana_state);
-		return NULL;
-	}
-	for (i = 0; i < n; i++) {
-		int id, cntlid, ns, fd;
-		char *ctrl_path;
-		ssize_t ret;
-
-		if (sscanf(paths[i]->d_name, "nvme%dc%dn%d",
-			   &id, &cntlid, &ns) != 3) {
-			if (sscanf(paths[i]->d_name, "nvme%dn%d",
-				   &id, &ns) != 2) {
-				continue;
-			}
-		}
-		if (ns != nsid)
-			continue;
-
-		ret = asprintf(&ctrl_path, "%s/%s/ana_state",
-			       path, paths[i]->d_name);
-		if (ret < 0) {
-			free(ana_state);
-			ana_state = NULL;
-			break;
-		}
-		fd = open(ctrl_path, O_RDONLY);
-		if (fd < 0) {
-			free(ctrl_path);
-			free(ana_state);
-			ana_state = NULL;
-			break;
-		}
-		ret = read(fd, ana_state, 16);
-		if (ret < 0) {
-			fprintf(stderr, "Failed to read ANA state from %s\n",
-				ctrl_path);
-			free(ana_state);
-			ana_state = NULL;
-		} else if (ana_state[strlen(ana_state) - 1] == '\n')
-			ana_state[strlen(ana_state) - 1] = '\0';
-		close(fd);
-		free(ctrl_path);
-		break;
-	}
-	for (i = 0; i < n; i++)
-		free(paths[i]);
-	free(paths);
-	return ana_state;
-}
-
-static bool ns_attached_to_ctrl(int nsid, struct nvme_ctrl *ctrl)
-{
-	struct nvme_namespace *n;
-	int i;
-
-	for (i = 0; i < ctrl->nr_namespaces; i++) {
-		n = &ctrl->namespaces[i];
-		if (nsid == n->nsid)
-			return true;
-	}
-	return false;
-}
-
-static int scan_ctrl(struct nvme_ctrl *c, char *p, __u32 ns_instance)
-{
-	struct nvme_namespace *n;
-	struct dirent **ns;
-	char *path;
-	int i, fd, ret;
-
-	ret = asprintf(&path, "%s/%s", p, c->name);
-	if (ret < 0)
-		return ret;
-
-	c->address = nvme_get_ctrl_attr(path, "address");
-	c->transport = nvme_get_ctrl_attr(path, "transport");
-	c->state = nvme_get_ctrl_attr(path, "state");
-	c->hostnqn = nvme_get_ctrl_attr(path, "hostnqn");
-	c->hostid = nvme_get_ctrl_attr(path, "hostid");
-
-	if (ns_instance)
-		c->ana_state = get_nvme_ctrl_path_ana_state(path, ns_instance);
-
-	ret = scandir(path, &ns, scan_ctrl_namespace_filter, alphasort);
-	if (ret == -1) {
-		fprintf(stderr, "Failed to open %s: %s\n", path, strerror(errno));
-		return errno;
-	}
-
-	c->nr_namespaces = ret;
-	c->namespaces = calloc(c->nr_namespaces, sizeof(*n));
-	if (c->namespaces) {
-		for (i = 0; i < c->nr_namespaces; i++) {
-			char *ns_path, nsid[16];
-			int ns_fd;
-
-			n = &c->namespaces[i];
-			n->name = strdup(ns[i]->d_name);
-			n->ctrl = c;
-			ret = asprintf(&ns_path, "%s/%s/nsid", path, n->name);
-			if (ret < 0)
-				continue;
-			ns_fd = open(ns_path, O_RDONLY);
-			if (ns_fd < 0) {
-				free(ns_path);
-				continue;
-			}
-			ret = read(ns_fd, nsid, 16);
-			if (ret < 0) {
-				close(ns_fd);
-				free(ns_path);
-				continue;
-			}
-			n->nsid = (unsigned)strtol(nsid, NULL, 10);
-			scan_namespace(n);
-			close(ns_fd);
-			free(ns_path);
-		}
-	} else {
-		i = c->nr_namespaces;
-		c->nr_namespaces = 0;
-	}
-
-	while (i--)
-		free(ns[i]);
-	free(ns);
-	free(path);
-
-	ret = asprintf(&path, "%s%s", c->path, c->name);
-	if (ret < 0)
-		return ret;
-
-	fd = open(path, O_RDONLY);
-	if (fd < 0)
-		goto free;
-
-	ret = nvme_identify_ctrl(fd, &c->id);
-	if (ret < 0)
-		goto close_fd;
-close_fd:
-	close(fd);
-free:
-	free(path);
-	return 0;
-}
-
-static int scan_subsystem(struct nvme_subsystem *s, __u32 ns_instance, int nsid)
-{
-	struct dirent **ctrls, **ns;
-	struct nvme_namespace *n;
-	struct nvme_ctrl *c;
-	int i, j = 0, ret;
-	char *path;
-
-	ret = asprintf(&path, "%s%s", subsys_dir, s->name);
-	if (ret < 0)
-		return ret;
-
-	s->subsysnqn = get_nvme_subsnqn(path);
-	ret = scandir(path, &ctrls, scan_ctrls_filter, alphasort);
-	if (ret == -1) {
-		fprintf(stderr, "Failed to open %s: %s\n", path, strerror(errno));
-		return errno;
-	}
-	s->nr_ctrls = ret;
-	s->ctrls = calloc(s->nr_ctrls, sizeof(*c));
-	for (i = 0; i < s->nr_ctrls; i++) {
-		c = &s->ctrls[j];
-		c->name = strdup(ctrls[i]->d_name);
-		c->path = strdup(dev);
-		c->subsys = s;
-		scan_ctrl(c, path, ns_instance);
-
-		if (!ns_instance || ns_attached_to_ctrl(nsid, c))
-			j++;
-		else
-			free_ctrl(c);
-	}
-	s->nr_ctrls = j;
-
-	while (i--)
-		free(ctrls[i]);
-	free(ctrls);
-
-	ret = scandir(path, &ns, scan_namespace_filter, alphasort);
-	if (ret == -1) {
-		fprintf(stderr, "Failed to open %s: %s\n", path, strerror(errno));
-		return errno;
-	}
-
-	s->nr_namespaces = ret;
-	s->namespaces = calloc(s->nr_namespaces, sizeof(*n));
-	if (s->namespaces) {
-		for (i = 0; i < s->nr_namespaces; i++) {
-			n = &s->namespaces[i];
-			n->name = strdup(ns[i]->d_name);
-			for (j = 0; j < s->nr_ctrls; j++) {
-				n->ctrl = &s->ctrls[j];
-				if (!strcmp(n->ctrl->state, "live") &&
-						!scan_namespace(n))
-					break;
-			}
-		}
-	} else {
-		i = s->nr_namespaces;
-		s->nr_namespaces = 0;
-	}
-
-	while (i--)
-		free(ns[i]);
-	free(ns);
-
-	free(path);
-	return 0;
-}
-
-static int verify_legacy_ns(struct nvme_namespace *n)
-{
-	struct nvme_ctrl *c = n->ctrl;
-	struct nvme_id_ctrl id;
-	char *path;
-	int ret, fd;
-
-	ret = asprintf(&path, "%s%s", n->ctrl->path, n->name);
-	if (ret < 0)
-		return ret;
-
-	if (!n->ctrl->transport && !n->ctrl->address) {
-		char tmp_address[64] = "";
-		legacy_get_pci_bdf(path, tmp_address);
-		if (tmp_address[0]) {
-			if (asprintf(&n->ctrl->transport, "pcie") < 0)
-				return -1;
-			if (asprintf(&n->ctrl->address, "%s", tmp_address) < 0)
-				return -1;
-		}
-	}
-
-	fd = open(path, O_RDONLY);
-	free (path);
-
-	if (fd < 0)
-		return fd;
-
-	ret = nvme_identify_ctrl(fd, &id);
-	close(fd);
-
-	if (ret)
-		return ret;
-
-	if (memcmp(id.mn, c->id.mn, sizeof(id.mn)) ||
-	    memcmp(id.sn, c->id.sn, sizeof(id.sn)))
-		return -ENODEV;
-	return 0;
-}
-
-/*
- * For pre-subsystem enabled kernel. Topology information is limited, but we can
- * assume controller names are always a prefix to their namespaces, i.e. nvme0
- * is the controller to nvme0n1 for such older kernels. We will also assume
- * every controller is its own subsystem.
- */
-static int legacy_list(struct nvme_topology *t, char *dev_dir)
-{
-	struct nvme_ctrl *c;
-	struct nvme_subsystem *s;
-	struct nvme_namespace *n;
-	struct dirent **devices, **namespaces;
-	int ret = 0, fd, i;
-	char *path;
-
-	t->nr_subsystems = scandir(dev_dir, &devices, scan_ctrls_filter, alphasort);
-	if (t->nr_subsystems == -1) {
-		fprintf(stderr, "Failed to open %s: %s\n", dev_dir, strerror(errno));
-		return errno;
-	}
-
-	t->subsystems = calloc(t->nr_subsystems, sizeof(*s));
-	for (i = 0; i < t->nr_subsystems; i++) {
-		int j;
-
-		s = &t->subsystems[i];
-		s->nr_ctrls = 1;
-		s->ctrls = calloc(s->nr_ctrls, sizeof(*c));
-		s->name = strdup(devices[i]->d_name);
-		s->subsysnqn = strdup(s->name);
-		s->nr_namespaces = 0;
-
-		c = s->ctrls;
-		c->name = strdup(s->name);
-		sscanf(c->name, "nvme%d", &current_index);
-		c->path = strdup(dev_dir);
-		c->nr_namespaces = scandir(c->path, &namespaces, scan_dev_filter,
-					   alphasort);
-		c->namespaces = calloc(c->nr_namespaces, sizeof(*n));
-		if (!c->namespaces) {
-			while (c->nr_namespaces--)
-				free(namespaces[c->nr_namespaces]);
-			free(namespaces);
-			continue;
-		}
-
-		ret = asprintf(&path, "%s%s", c->path, c->name);
-		if (ret < 0)
-			continue;
-		ret = 0;
-
-		fd = open(path, O_RDONLY);
-		if (fd > 0) {
-			nvme_identify_ctrl(fd, &c->id);
-			close(fd);
-		}
-		free(path);
-
-		for (j = 0; j < c->nr_namespaces; j++) {
-			n = &c->namespaces[j];
-			n->name = strdup(namespaces[j]->d_name);
-			n->ctrl = c;
-			scan_namespace(n);
-			ret = verify_legacy_ns(n);
-			if (ret)
-				goto free;
-		}
-		while (j--)
-			free(namespaces[j]);
-		free(namespaces);
-	}
-
-free:
-	while (i--)
-		free(devices[i]);
-	free(devices);
-	return ret;
-}
-
-static void free_ctrl(struct nvme_ctrl *c)
-{
-	int i;
-
-	for (i = 0; i < c->nr_namespaces; i++) {
-		struct nvme_namespace *n = &c->namespaces[i];
-		free(n->name);
-	}
-	free(c->name);
-	free(c->path);
-	free(c->transport);
-	free(c->address);
-	free(c->state);
-	free(c->hostnqn);
-	free(c->hostid);
-	free(c->ana_state);
-	free(c->namespaces);
-}
-
-static void free_subsystem(struct nvme_subsystem *s)
-{
-	int i;
-
-	for (i = 0; i < s->nr_ctrls; i++)
-		free_ctrl(&s->ctrls[i]);
-	for (i = 0; i < s->nr_namespaces; i++) {
-		struct nvme_namespace *n = &s->namespaces[i];
-		free(n->name);
-	}
-	free(s->name);
-	free(s->subsysnqn);
-	free(s->ctrls);
-	free(s->namespaces);
-}
-
-static int scan_subsystem_dir(struct nvme_topology *t, char *dev_dir)
-{
-	struct nvme_topology dev_dir_t = { };
-	int ret, i, total_nr_subsystems;
-
-	ret = legacy_list(&dev_dir_t, dev_dir);
-	if (ret != 0)
-		return ret;
-
-	total_nr_subsystems = t->nr_subsystems + dev_dir_t.nr_subsystems;
-	t->subsystems = realloc(t->subsystems,
-				total_nr_subsystems * sizeof(struct nvme_subsystem));
-	for (i = 0; i < dev_dir_t.nr_subsystems; i++){
-		t->subsystems[i+t->nr_subsystems] = dev_dir_t.subsystems[i];
-	}
-	t->nr_subsystems = total_nr_subsystems;
-
-	return 0;
-}
-
-int scan_subsystems(struct nvme_topology *t, const char *subsysnqn,
-		    __u32 ns_instance, int nsid, char *dev_dir)
-{
-	struct nvme_subsystem *s;
-	struct dirent **subsys;
-	int ret = 0, i, j = 0;
-
-	t->nr_subsystems = scandir(subsys_dir, &subsys, scan_subsys_filter,
-				   alphasort);
-	if (t->nr_subsystems < 0) {
-		ret = legacy_list(t, (char *)dev);
-		if (ret != 0)
-			return ret;
-	} else {
-
-		t->subsystems = calloc(t->nr_subsystems, sizeof(*s));
-		for (i = 0; i < t->nr_subsystems; i++) {
-			s = &t->subsystems[j];
-			s->name = strdup(subsys[i]->d_name);
-			scan_subsystem(s, ns_instance, nsid);
-
-			if (!subsysnqn || !strcmp(s->subsysnqn, subsysnqn))
-				j++;
-			else
-				free_subsystem(s);
-		}
-		t->nr_subsystems = j;
-
-		while (i--)
-			free(subsys[i]);
-		free(subsys);
-	}
-
-	if (dev_dir != NULL && strcmp(dev_dir, "/dev/")) {
-		ret = scan_subsystem_dir(t, dev_dir);
-	}
-
-	return ret;
-}
-
-void free_topology(struct nvme_topology *t)
-{
-	int i;
-
-	for (i = 0; i < t->nr_subsystems; i++)
-		free_subsystem(&t->subsystems[i]);
-	free(t->subsystems);
-}
-
-char *nvme_char_from_block(char *dev)
-{
-	char *path = NULL;
-	char buf[256] = {0};
-	int ret, id, nsid;
-
-	ret = sscanf(dev, "nvme%dn%d", &id, &nsid);
-	switch (ret) {
-	case 1:
-		return strdup(dev);
-		break;
-	case 2:
-		if (asprintf(&path, "/sys/block/%s/device", dev) < 0)
-			path = NULL;
-		break;
-	default:
-		fprintf(stderr, "%s is not an nvme device\n", dev);
-		return NULL;
-	}
-
-	if (!path)
-		return NULL;
-
-	ret = readlink(path, buf, sizeof(buf));
-	if (ret > 0) {
-		char *r = strdup(basename(buf));
-
-		free(path);
-		if (sscanf(r, "nvme%d", &id) != 1) {
-			fprintf(stderr, "%s is not a physical nvme controller\n", r);
-			free(r);
-			r = NULL;
-		}
-		return r;
-	}
-
-	free(path);
-	ret = asprintf(&path, "nvme%d", id);
-	if (ret < 0)
-		return NULL;
-	return path;
-}
-
-int nvme_logical_block_size_from_ns_char(const char *dev)
-{
-	int ret;
-	int id, nsid;
-	char *path = NULL;
-	char *s;
-
-	ret = sscanf(dev, "ng%dn%d", &id, &nsid);
-	if (ret != 2)
-		return -EINVAL;
-
-	if (asprintf(&path, "/sys/block/nvme%dn%d/queue", id, nsid) < 0)
-		path = NULL;
-
-	if (!path)
-		return -EINVAL;
-
-	s = nvme_get_ctrl_attr(path, "logical_block_size");
-	if (!s)
-		return -EINVAL;
-
-	return atoi(s);
-}
-
-void *mmap_registers(const char *dev)
-{
-	int fd;
-	char *base, path[512];
-	void *membase;
-
-	base = nvme_char_from_block((char *)dev);
-	if (!base)
-		return NULL;
-
-	sprintf(path, "/sys/class/nvme/%s/device/resource0", base);
-	fd = open(path, O_RDONLY);
-	if (fd < 0) {
-		sprintf(path, "/sys/class/misc/%s/device/resource0", base);
-		fd = open(path, O_RDONLY);
-	}
-	if (fd < 0) {
-		fprintf(stderr, "%s did not find a pci resource, open failed %s\n",
-				base, strerror(errno));
-		free(base);
-		return NULL;
-	}
-
-	membase = mmap(NULL, getpagesize(), PROT_READ, MAP_SHARED, fd, 0);
-	if (membase == MAP_FAILED) {
-		fprintf(stderr, "%s failed to map. ", base);
-		fprintf(stderr, "Did your kernel enable CONFIG_IO_STRICT_DEVMEM?\n");
-		membase = NULL;
-	}
-
-	free(base);
-	close(fd);
-	return membase;
-}
-
-#define PATH_DMI_ENTRIES	"/sys/firmware/dmi/entries"
-
-int uuid_from_dmi(char *system_uuid)
-{
-	int f;
-	DIR *d;
-	struct dirent *de;
-	char buf[512];
-
-	system_uuid[0] = '\0';
-	d = opendir(PATH_DMI_ENTRIES);
-	if (!d)
-		return -ENXIO;
-	while ((de = readdir(d))) {
-		char filename[PATH_MAX];
-		int len, type;
-
-		if (de->d_name[0] == '.')
-			continue;
-		sprintf(filename, "%s/%s/type", PATH_DMI_ENTRIES, de->d_name);
-		f = open(filename, O_RDONLY);
-		if (f < 0)
-			continue;
-		len = read(f, buf, 512);
-		close(f);
-		if (len < 0)
-			continue;
-		if (sscanf(buf, "%d", &type) != 1)
-			continue;
-		if (type != 1)
-			continue;
-		sprintf(filename, "%s/%s/raw", PATH_DMI_ENTRIES, de->d_name);
-		f = open(filename, O_RDONLY);
-		if (f < 0)
-			continue;
-		len = read(f, buf, 512);
-		close(f);
-		if (len < 0)
-			continue;
-		/* Sigh. https://en.wikipedia.org/wiki/Overengineering */
-		/* DMTF SMBIOS 3.0 Section 7.2.1 System UUID */
-		sprintf(system_uuid,
-			"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-"
-			"%02x%02x%02x%02x%02x%02x",
-			(uint8_t)buf[8 + 3], (uint8_t)buf[8 + 2],
-			(uint8_t)buf[8 + 1], (uint8_t)buf[8 + 0],
-			(uint8_t)buf[8 + 5], (uint8_t)buf[8 + 4],
-			(uint8_t)buf[8 + 7], (uint8_t)buf[8 + 6],
-			(uint8_t)buf[8 + 8], (uint8_t)buf[8 + 9],
-			(uint8_t)buf[8 + 10], (uint8_t)buf[8 + 11],
-			(uint8_t)buf[8 + 12], (uint8_t)buf[8 + 13],
-			(uint8_t)buf[8 + 14], (uint8_t)buf[8 + 15]);
-		break;
-	}
-	closedir(d);
-	return strlen(system_uuid) ? 0 : -ENXIO;
-}
-
-int uuid_from_systemd(char *systemd_uuid)
-{
-#ifdef HAVE_SYSTEMD
-	sd_id128_t id;
-
-	if (sd_id128_get_machine_app_specific(NVME_HOSTNQN_ID, &id) < 0)
-		return -ENXIO;
-
-	sprintf(systemd_uuid, SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(id));
-	return 0;
-#else
-	return -ENOTSUP;
-#endif
-}