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-rw-r--r--src/nvme/tree.c1994
1 files changed, 1994 insertions, 0 deletions
diff --git a/src/nvme/tree.c b/src/nvme/tree.c
new file mode 100644
index 0000000..18826bf
--- /dev/null
+++ b/src/nvme/tree.c
@@ -0,0 +1,1994 @@
+// 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 <dirent.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <libgen.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include <ccan/endian/endian.h>
+#include <ccan/list/list.h>
+
+#include "ioctl.h"
+#include "linux.h"
+#include "filters.h"
+#include "tree.h"
+#include "filters.h"
+#include "util.h"
+#include "fabrics.h"
+#include "log.h"
+#include "private.h"
+
+static struct nvme_host *default_host;
+
+static void __nvme_free_host(nvme_host_t h);
+static void __nvme_free_ctrl(nvme_ctrl_t c);
+static int nvme_subsystem_scan_namespace(nvme_root_t r,
+ struct nvme_subsystem *s, char *name,
+ nvme_scan_filter_t f, void *f_args);
+static int nvme_init_subsystem(nvme_subsystem_t s, const char *name);
+static int nvme_scan_subsystem(nvme_root_t r, const char *name,
+ nvme_scan_filter_t f, void *f_args);
+static int nvme_ctrl_scan_namespace(nvme_root_t r, struct nvme_ctrl *c,
+ char *name);
+static int nvme_ctrl_scan_path(nvme_root_t r, struct nvme_ctrl *c, char *name);
+
+static inline void nvme_free_dirents(struct dirent **d, int i)
+{
+ while (i-- > 0)
+ free(d[i]);
+ free(d);
+}
+
+nvme_host_t nvme_default_host(nvme_root_t r)
+{
+ struct nvme_host *h;
+ char *hostnqn, *hostid;
+
+ hostnqn = nvmf_hostnqn_from_file();
+ if (!hostnqn)
+ hostnqn = nvmf_hostnqn_generate();
+ hostid = nvmf_hostid_from_file();
+
+ h = nvme_lookup_host(r, hostnqn, hostid);
+
+ nvme_host_set_hostsymname(h, NULL);
+
+ default_host = h;
+ free(hostnqn);
+ if (hostid)
+ free(hostid);
+ return h;
+}
+
+int nvme_scan_topology(struct nvme_root *r, nvme_scan_filter_t f, void *f_args)
+{
+ struct dirent **subsys, **ctrls;
+ int i, num_subsys, num_ctrls, ret;
+
+ if (!r)
+ return 0;
+
+ num_ctrls = nvme_scan_ctrls(&ctrls);
+ if (num_ctrls < 0) {
+ nvme_msg(r, LOG_DEBUG, "failed to scan ctrls: %s\n",
+ strerror(errno));
+ return num_ctrls;
+ }
+
+ for (i = 0; i < num_ctrls; i++) {
+ nvme_ctrl_t c = nvme_scan_ctrl(r, ctrls[i]->d_name);
+ if (!c) {
+ nvme_msg(r, LOG_DEBUG, "failed to scan ctrl %s: %s\n",
+ ctrls[i]->d_name, strerror(errno));
+ continue;
+ }
+ if ((f) && !f(NULL, c, NULL, f_args)) {
+ nvme_msg(r, LOG_DEBUG, "filter out controller %s\n",
+ ctrls[i]->d_name);
+ nvme_free_ctrl(c);
+ }
+ }
+
+ nvme_free_dirents(ctrls, i);
+
+ num_subsys = nvme_scan_subsystems(&subsys);
+ if (num_subsys < 0) {
+ nvme_msg(r, LOG_DEBUG, "failed to scan subsystems: %s\n",
+ strerror(errno));
+ return num_subsys;
+ }
+
+ for (i = 0; i < num_subsys; i++) {
+ ret = nvme_scan_subsystem(r, subsys[i]->d_name, f, f_args);
+ if (ret < 0) {
+ nvme_msg(r, LOG_DEBUG,
+ "failed to scan subsystem %s: %s\n",
+ subsys[i]->d_name, strerror(errno));
+ }
+ }
+
+ nvme_free_dirents(subsys, i);
+
+ return 0;
+}
+
+nvme_root_t nvme_create_root(FILE *fp, int log_level)
+{
+ struct nvme_root *r = calloc(1, sizeof(*r));
+
+ if (!r) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ r->log_level = log_level;
+ r->fp = stderr;
+ if (fp)
+ r->fp = fp;
+ list_head_init(&r->hosts);
+ list_head_init(&r->endpoints);
+ return r;
+}
+
+int nvme_read_config(nvme_root_t r, const char *config_file)
+{
+ int err = -1;
+
+ if (!r || !config_file) {
+ errno = ENODEV;
+ return err;
+ }
+
+ r->config_file = strdup(config_file);
+ if (!r->config_file) {
+ errno = ENOMEM;
+ return err;
+ }
+ err = json_read_config(r, config_file);
+ /*
+ * The json configuration file is optional,
+ * so ignore errors when opening the file.
+ */
+ if (err < 0 && errno != EPROTO)
+ err = 0;
+
+ return err;
+}
+
+nvme_root_t nvme_scan(const char *config_file)
+{
+ nvme_root_t r = nvme_create_root(NULL, DEFAULT_LOGLEVEL);
+
+ nvme_scan_topology(r, NULL, NULL);
+ nvme_read_config(r, config_file);
+ return r;
+}
+
+int nvme_update_config(nvme_root_t r)
+{
+ if (!r->modified || !r->config_file)
+ return 0;
+
+ return json_update_config(r, r->config_file);
+}
+
+int nvme_dump_config(nvme_root_t r)
+{
+ return json_update_config(r, NULL);
+}
+
+int nvme_dump_tree(nvme_root_t r)
+{
+ return json_dump_tree(r);
+}
+
+nvme_host_t nvme_first_host(nvme_root_t r)
+{
+ return list_top(&r->hosts, struct nvme_host, entry);
+}
+
+nvme_host_t nvme_next_host(nvme_root_t r, nvme_host_t h)
+{
+ return h ? list_next(&r->hosts, h, entry) : NULL;
+}
+
+nvme_root_t nvme_host_get_root(nvme_host_t h)
+{
+ return h->r;
+}
+
+const char *nvme_host_get_hostnqn(nvme_host_t h)
+{
+ return h->hostnqn;
+}
+
+const char *nvme_host_get_hostid(nvme_host_t h)
+{
+ return h->hostid;
+}
+
+const char *nvme_host_get_hostsymname(nvme_host_t h)
+{
+ return h->hostsymname;
+}
+
+void nvme_host_set_hostsymname(nvme_host_t h, const char *hostsymname)
+{
+ if (h->hostsymname) {
+ free(h->hostsymname);
+ h->hostsymname = NULL;
+ }
+ if (hostsymname)
+ h->hostsymname = strdup(hostsymname);
+}
+
+const char *nvme_host_get_dhchap_key(nvme_host_t h)
+{
+ return h->dhchap_key;
+}
+
+void nvme_host_set_dhchap_key(nvme_host_t h, const char *key)
+{
+ if (h->dhchap_key) {
+ free(h->dhchap_key);
+ h->dhchap_key = NULL;
+ }
+ if (key)
+ h->dhchap_key = strdup(key);
+}
+
+void nvme_host_set_pdc_enabled(nvme_host_t h, bool enabled)
+{
+ h->pdc_enabled_valid = true;
+ h->pdc_enabled = enabled;
+}
+
+bool nvme_host_is_pdc_enabled(nvme_host_t h, bool fallback)
+{
+ if (h->pdc_enabled_valid)
+ return h->pdc_enabled;
+ return fallback;
+}
+
+nvme_subsystem_t nvme_first_subsystem(nvme_host_t h)
+{
+ return list_top(&h->subsystems, struct nvme_subsystem, entry);
+}
+
+nvme_subsystem_t nvme_next_subsystem(nvme_host_t h, nvme_subsystem_t s)
+{
+ return s ? list_next(&h->subsystems, s, entry) : NULL;
+}
+
+void nvme_refresh_topology(nvme_root_t r)
+{
+ struct nvme_host *h, *_h;
+
+ nvme_for_each_host_safe(r, h, _h)
+ __nvme_free_host(h);
+ nvme_scan_topology(r, NULL, NULL);
+}
+
+void nvme_free_tree(nvme_root_t r)
+{
+ struct nvme_host *h, *_h;
+
+ nvme_for_each_host_safe(r, h, _h)
+ __nvme_free_host(h);
+ if (r->config_file)
+ free(r->config_file);
+ free(r);
+}
+
+const char *nvme_subsystem_get_nqn(nvme_subsystem_t s)
+{
+ return s->subsysnqn;
+}
+
+const char *nvme_subsystem_get_sysfs_dir(nvme_subsystem_t s)
+{
+ return s->sysfs_dir;
+}
+
+const char *nvme_subsystem_get_name(nvme_subsystem_t s)
+{
+ return s->name;
+}
+
+const char *nvme_subsystem_get_type(nvme_subsystem_t s)
+{
+ return s->subsystype;
+}
+
+nvme_ctrl_t nvme_subsystem_first_ctrl(nvme_subsystem_t s)
+{
+ return list_top(&s->ctrls, struct nvme_ctrl, entry);
+}
+
+nvme_ctrl_t nvme_subsystem_next_ctrl(nvme_subsystem_t s, nvme_ctrl_t c)
+{
+ return c ? list_next(&s->ctrls, c, entry) : NULL;
+}
+
+nvme_host_t nvme_subsystem_get_host(nvme_subsystem_t s)
+{
+ return s->h;
+}
+
+nvme_ns_t nvme_subsystem_first_ns(nvme_subsystem_t s)
+{
+ return list_top(&s->namespaces, struct nvme_ns, entry);
+}
+
+nvme_ns_t nvme_subsystem_next_ns(nvme_subsystem_t s, nvme_ns_t n)
+{
+ return n ? list_next(&s->namespaces, n, entry) : NULL;
+}
+
+nvme_path_t nvme_namespace_first_path(nvme_ns_t ns)
+{
+ return list_top(&ns->paths, struct nvme_path, nentry);
+}
+
+nvme_path_t nvme_namespace_next_path(nvme_ns_t ns, nvme_path_t p)
+{
+ return p ? list_next(&ns->paths, p, nentry) : NULL;
+}
+
+static void __nvme_free_ns(struct nvme_ns *n)
+{
+ list_del_init(&n->entry);
+ close(n->fd);
+ free(n->generic_name);
+ free(n->name);
+ free(n->sysfs_dir);
+ free(n);
+}
+
+/* Stub for SWIG */
+void nvme_free_ns(struct nvme_ns *n)
+{
+}
+
+static void __nvme_free_subsystem(struct nvme_subsystem *s)
+{
+ struct nvme_ctrl *c, *_c;
+ struct nvme_ns *n, *_n;
+
+ list_del_init(&s->entry);
+ nvme_subsystem_for_each_ctrl_safe(s, c, _c)
+ __nvme_free_ctrl(c);
+
+ nvme_subsystem_for_each_ns_safe(s, n, _n)
+ __nvme_free_ns(n);
+
+ if (s->name)
+ free(s->name);
+ free(s->sysfs_dir);
+ free(s->subsysnqn);
+ if (s->model)
+ free(s->model);
+ if (s->serial)
+ free(s->serial);
+ if (s->firmware)
+ free(s->firmware);
+ if (s->subsystype)
+ free(s->subsystype);
+ free(s);
+}
+
+/*
+ * Stub for SWIG
+ */
+void nvme_free_subsystem(nvme_subsystem_t s)
+{
+}
+
+struct nvme_subsystem *nvme_alloc_subsystem(struct nvme_host *h,
+ const char *name,
+ const char *subsysnqn)
+{
+ struct nvme_subsystem *s;
+
+ s = calloc(1, sizeof(*s));
+ if (!s)
+ return NULL;
+
+ s->h = h;
+ s->subsysnqn = strdup(subsysnqn);
+ if (name)
+ nvme_init_subsystem(s, name);
+ list_head_init(&s->ctrls);
+ list_head_init(&s->namespaces);
+ list_node_init(&s->entry);
+ list_add(&h->subsystems, &s->entry);
+ h->r->modified = true;
+ return s;
+}
+
+struct nvme_subsystem *nvme_lookup_subsystem(struct nvme_host *h,
+ const char *name,
+ const char *subsysnqn)
+{
+ struct nvme_subsystem *s;
+
+ nvme_for_each_subsystem(h, s) {
+ if (subsysnqn && s->subsysnqn &&
+ strcmp(s->subsysnqn, subsysnqn))
+ continue;
+ if (name && s->name &&
+ strcmp(s->name, name))
+ continue;
+ return s;
+ }
+ return nvme_alloc_subsystem(h, name, subsysnqn);
+}
+
+static void __nvme_free_host(struct nvme_host *h)
+{
+ struct nvme_subsystem *s, *_s;
+
+ list_del_init(&h->entry);
+ nvme_for_each_subsystem_safe(h, s, _s)
+ __nvme_free_subsystem(s);
+ free(h->hostnqn);
+ if (h->hostid)
+ free(h->hostid);
+ if (h->dhchap_key)
+ free(h->dhchap_key);
+ nvme_host_set_hostsymname(h, NULL);
+ h->r->modified = true;
+ free(h);
+}
+
+/* Stub for SWIG */
+void nvme_free_host(struct nvme_host *h)
+{
+}
+
+struct nvme_host *nvme_lookup_host(nvme_root_t r, const char *hostnqn,
+ const char *hostid)
+{
+ struct nvme_host *h;
+
+ if (!hostnqn)
+ return NULL;
+ nvme_for_each_host(r, h) {
+ if (strcmp(h->hostnqn, hostnqn))
+ continue;
+ if (hostid && (!h->hostid ||
+ strcmp(h->hostid, hostid)))
+ continue;
+ return h;
+ }
+ h = calloc(1,sizeof(*h));
+ if (!h)
+ return NULL;
+ h->hostnqn = strdup(hostnqn);
+ if (hostid)
+ h->hostid = strdup(hostid);
+ list_head_init(&h->subsystems);
+ list_node_init(&h->entry);
+ h->r = r;
+ list_add(&r->hosts, &h->entry);
+ r->modified = true;
+
+ return h;
+}
+
+static int nvme_subsystem_scan_namespaces(nvme_root_t r, nvme_subsystem_t s,
+ nvme_scan_filter_t f, void *f_args)
+{
+ struct dirent **namespaces;
+ int i, num_ns, ret;
+
+ num_ns = nvme_scan_subsystem_namespaces(s, &namespaces);
+ if (num_ns < 0) {
+ nvme_msg(r, LOG_DEBUG,
+ "failed to scan namespaces for subsys %s: %s\n",
+ s->subsysnqn, strerror(errno));
+ return num_ns;
+ }
+
+ for (i = 0; i < num_ns; i++) {
+ ret = nvme_subsystem_scan_namespace(r, s,
+ namespaces[i]->d_name, f, f_args);
+ if (ret < 0)
+ nvme_msg(r, LOG_DEBUG,
+ "failed to scan namespace %s: %s\n",
+ namespaces[i]->d_name, strerror(errno));
+ }
+
+ nvme_free_dirents(namespaces, i);
+ return 0;
+}
+
+static int nvme_init_subsystem(nvme_subsystem_t s, const char *name)
+{
+ char *path;
+
+ if (asprintf(&path, "%s/%s", nvme_subsys_sysfs_dir, name) < 0)
+ return -1;
+
+ s->model = nvme_get_attr(path, "model");
+ if (!s->model)
+ s->model = strdup("undefined");
+ s->serial = nvme_get_attr(path, "serial");
+ s->firmware = nvme_get_attr(path, "firmware_rev");
+ s->subsystype = nvme_get_attr(path, "subsystype");
+ if (!s->subsystype) {
+ if (!strcmp(s->subsysnqn, NVME_DISC_SUBSYS_NAME))
+ s->subsystype = strdup("discovery");
+ else
+ s->subsystype = strdup("nvm");
+ }
+ s->name = strdup(name);
+ s->sysfs_dir = (char *)path;
+
+ return 0;
+}
+
+static int nvme_scan_subsystem(struct nvme_root *r, const char *name,
+ nvme_scan_filter_t f, void *f_args)
+{
+ struct nvme_subsystem *s = NULL, *_s;
+ char *path, *subsysnqn;
+ nvme_host_t h = NULL;
+ int ret;
+
+ nvme_msg(r, LOG_DEBUG, "scan subsystem %s\n", name);
+ ret = asprintf(&path, "%s/%s", nvme_subsys_sysfs_dir, name);
+ if (ret < 0)
+ return ret;
+
+ subsysnqn = nvme_get_attr(path, "subsysnqn");
+ free(path);
+ if (!subsysnqn) {
+ errno = ENODEV;
+ return -1;
+ }
+ nvme_for_each_host(r, h) {
+ nvme_for_each_subsystem(h, _s) {
+ /*
+ * We are always called after nvme_scan_ctrl(),
+ * so any subsystem we're interested at _must_
+ * have a name.
+ */
+ if (!_s->name)
+ continue;
+ if (strcmp(_s->name, name))
+ continue;
+ s = _s;
+ }
+ }
+ if (!s) {
+ /*
+ * Subsystem with non-matching controller. odd.
+ * Create a subsystem with the default host
+ * and hope for the best.
+ */
+ nvme_msg(r, LOG_DEBUG, "creating detached subsystem '%s'\n",
+ name);
+ h = nvme_default_host(r);
+ s = nvme_alloc_subsystem(h, name, subsysnqn);
+ if (!s) {
+ errno = ENOMEM;
+ }
+ } else if (strcmp(s->subsysnqn, subsysnqn)) {
+ nvme_msg(r, LOG_WARNING, "NQN mismatch for subsystem '%s'\n",
+ name);
+ s = NULL;
+ free(subsysnqn);
+ errno = EINVAL;
+ return -1;
+ }
+ free(subsysnqn);
+ if (!s)
+ return -1;
+
+ if (f && !f(s, NULL, NULL, f_args)) {
+ nvme_msg(r, LOG_DEBUG, "filter out subsystem %s\n", name);
+ __nvme_free_subsystem(s);
+ return 0;
+ }
+
+ nvme_subsystem_scan_namespaces(r, s, f, f_args);
+
+ return 0;
+}
+
+nvme_ctrl_t nvme_path_get_ctrl(nvme_path_t p)
+{
+ return p->c;
+}
+
+nvme_ns_t nvme_path_get_ns(nvme_path_t p)
+{
+ return p->n;
+}
+
+const char *nvme_path_get_sysfs_dir(nvme_path_t p)
+{
+ return p->sysfs_dir;
+}
+
+const char *nvme_path_get_name(nvme_path_t p)
+{
+ return p->name;
+}
+
+const char *nvme_path_get_ana_state(nvme_path_t p)
+{
+ return p->ana_state;
+}
+
+void nvme_free_path(struct nvme_path *p)
+{
+ list_del_init(&p->entry);
+ list_del_init(&p->nentry);
+ free(p->name);
+ free(p->sysfs_dir);
+ free(p->ana_state);
+ free(p);
+}
+
+static void nvme_subsystem_set_path_ns(nvme_subsystem_t s, nvme_path_t p)
+{
+ char n_name[32] = { };
+ int i, c, nsid, ret;
+ nvme_ns_t n;
+
+ ret = sscanf(nvme_path_get_name(p), "nvme%dc%dn%d", &i, &c, &nsid);
+ if (ret != 3)
+ return;
+
+ sprintf(n_name, "nvme%dn%d", i, nsid);
+ nvme_subsystem_for_each_ns(s, n) {
+ if (!strcmp(n_name, nvme_ns_get_name(n))) {
+ list_add(&n->paths, &p->nentry);
+ p->n = n;
+ }
+ }
+}
+
+static int nvme_ctrl_scan_path(nvme_root_t r, struct nvme_ctrl *c, char *name)
+{
+ struct nvme_path *p;
+ char *path, *grpid;
+ int ret;
+
+ nvme_msg(r, LOG_DEBUG, "scan controller %s path %s\n",
+ c->name, name);
+ if (!c->s) {
+ errno = ENXIO;
+ return -1;
+ }
+ ret = asprintf(&path, "%s/%s", c->sysfs_dir, name);
+ if (ret < 0) {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ p = calloc(1, sizeof(*p));
+ if (!p) {
+ errno = ENOMEM;
+ goto free_path;
+ }
+
+ p->c = c;
+ p->name = strdup(name);
+ p->sysfs_dir = path;
+ p->ana_state = nvme_get_path_attr(p, "ana_state");
+ if (!p->ana_state)
+ p->ana_state = strdup("optimized");
+
+ grpid = nvme_get_path_attr(p, "ana_grpid");
+ if (grpid) {
+ sscanf(grpid, "%d", &p->grpid);
+ free(grpid);
+ }
+
+ list_node_init(&p->nentry);
+ nvme_subsystem_set_path_ns(c->s, p);
+ list_node_init(&p->entry);
+ list_add(&c->paths, &p->entry);
+ return 0;
+
+free_path:
+ free(path);
+ return -1;
+}
+
+int nvme_ctrl_get_fd(nvme_ctrl_t c)
+{
+ nvme_root_t r = c->s && c->s->h ? c->s->h->r : NULL;
+
+ if (c->fd < 0) {
+ c->fd = nvme_open(c->name);
+ if (c->fd < 0)
+ nvme_msg(r, LOG_ERR,
+ "Failed to open ctrl %s, errno %d\n",
+ c->name, errno);
+ }
+ return c->fd;
+}
+
+nvme_subsystem_t nvme_ctrl_get_subsystem(nvme_ctrl_t c)
+{
+ return c->s;
+}
+
+const char *nvme_ctrl_get_name(nvme_ctrl_t c)
+{
+ return c->name;
+}
+
+const char *nvme_ctrl_get_sysfs_dir(nvme_ctrl_t c)
+{
+ return c->sysfs_dir;
+}
+
+const char *nvme_ctrl_get_subsysnqn(nvme_ctrl_t c)
+{
+ return c->s ? c->s->subsysnqn : c->subsysnqn;
+}
+
+const char *nvme_ctrl_get_address(nvme_ctrl_t c)
+{
+ return c->address ? c->address : "";
+}
+
+const char *nvme_ctrl_get_firmware(nvme_ctrl_t c)
+{
+ return c->firmware;
+}
+
+const char *nvme_ctrl_get_model(nvme_ctrl_t c)
+{
+ return c->model;
+}
+
+const char *nvme_ctrl_get_state(nvme_ctrl_t c)
+{
+ char *state = c->state;
+
+ c->state = nvme_get_ctrl_attr(c, "state");
+ if (state)
+ free(state);
+ return c->state;
+}
+
+const char *nvme_ctrl_get_numa_node(nvme_ctrl_t c)
+{
+ return c->numa_node;
+}
+
+const char *nvme_ctrl_get_queue_count(nvme_ctrl_t c)
+{
+ return c->queue_count;
+}
+
+const char *nvme_ctrl_get_serial(nvme_ctrl_t c)
+{
+ return c->serial;
+}
+
+const char *nvme_ctrl_get_sqsize(nvme_ctrl_t c)
+{
+ return c->sqsize;
+}
+
+const char *nvme_ctrl_get_transport(nvme_ctrl_t c)
+{
+ return c->transport;
+}
+
+const char *nvme_ctrl_get_traddr(nvme_ctrl_t c)
+{
+ return c->traddr;
+}
+
+const char *nvme_ctrl_get_trsvcid(nvme_ctrl_t c)
+{
+ return c->trsvcid;
+}
+
+const char *nvme_ctrl_get_host_traddr(nvme_ctrl_t c)
+{
+ return c->cfg.host_traddr;
+}
+
+const char *nvme_ctrl_get_host_iface(nvme_ctrl_t c)
+{
+ return c->cfg.host_iface;
+}
+
+struct nvme_fabrics_config *nvme_ctrl_get_config(nvme_ctrl_t c)
+{
+ return &c->cfg;
+}
+
+const char *nvme_ctrl_get_dhchap_host_key(nvme_ctrl_t c)
+{
+ return c->dhchap_key;
+}
+
+void nvme_ctrl_set_dhchap_host_key(nvme_ctrl_t c, const char *key)
+{
+ if (c->dhchap_key) {
+ free(c->dhchap_key);
+ c->dhchap_key = NULL;
+ }
+ if (key)
+ c->dhchap_key = strdup(key);
+}
+
+const char *nvme_ctrl_get_dhchap_key(nvme_ctrl_t c)
+{
+ return c->dhchap_ctrl_key;
+}
+
+void nvme_ctrl_set_dhchap_key(nvme_ctrl_t c, const char *key)
+{
+ if (c->dhchap_ctrl_key) {
+ free(c->dhchap_ctrl_key);
+ c->dhchap_ctrl_key = NULL;
+ }
+ if (key)
+ c->dhchap_ctrl_key = strdup(key);
+}
+
+void nvme_ctrl_set_discovered(nvme_ctrl_t c, bool discovered)
+{
+ c->discovered = discovered;
+}
+
+bool nvme_ctrl_is_discovered(nvme_ctrl_t c)
+{
+ return c->discovered;
+}
+
+void nvme_ctrl_set_persistent(nvme_ctrl_t c, bool persistent)
+{
+ c->persistent = persistent;
+}
+
+bool nvme_ctrl_is_persistent(nvme_ctrl_t c)
+{
+ return c->persistent;
+}
+
+void nvme_ctrl_set_discovery_ctrl(nvme_ctrl_t c, bool discovery)
+{
+ c->discovery_ctrl = discovery;
+}
+
+bool nvme_ctrl_is_discovery_ctrl(nvme_ctrl_t c)
+{
+ return c->discovery_ctrl;
+}
+
+void nvme_ctrl_set_unique_discovery_ctrl(nvme_ctrl_t c, bool unique)
+{
+ c->unique_discovery_ctrl = unique;
+}
+
+bool nvme_ctrl_is_unique_discovery_ctrl(nvme_ctrl_t c)
+{
+ return c->unique_discovery_ctrl;
+}
+
+int nvme_ctrl_identify(nvme_ctrl_t c, struct nvme_id_ctrl *id)
+{
+ return nvme_identify_ctrl(nvme_ctrl_get_fd(c), id);
+}
+
+nvme_ns_t nvme_ctrl_first_ns(nvme_ctrl_t c)
+{
+ return list_top(&c->namespaces, struct nvme_ns, entry);
+}
+
+nvme_ns_t nvme_ctrl_next_ns(nvme_ctrl_t c, nvme_ns_t n)
+{
+ return n ? list_next(&c->namespaces, n, entry) : NULL;
+}
+
+nvme_path_t nvme_ctrl_first_path(nvme_ctrl_t c)
+{
+ return list_top(&c->paths, struct nvme_path, entry);
+}
+
+nvme_path_t nvme_ctrl_next_path(nvme_ctrl_t c, nvme_path_t p)
+{
+ return p ? list_next(&c->paths, p, entry) : NULL;
+}
+
+#define FREE_CTRL_ATTR(a) \
+ do { if (a) { free(a); (a) = NULL; } } while (0)
+void nvme_deconfigure_ctrl(nvme_ctrl_t c)
+{
+ if (c->fd >= 0) {
+ close(c->fd);
+ c->fd = -1;
+ }
+ FREE_CTRL_ATTR(c->name);
+ FREE_CTRL_ATTR(c->sysfs_dir);
+ FREE_CTRL_ATTR(c->firmware);
+ FREE_CTRL_ATTR(c->model);
+ FREE_CTRL_ATTR(c->state);
+ FREE_CTRL_ATTR(c->numa_node);
+ FREE_CTRL_ATTR(c->queue_count);
+ FREE_CTRL_ATTR(c->serial);
+ FREE_CTRL_ATTR(c->sqsize);
+ FREE_CTRL_ATTR(c->dhchap_key);
+ FREE_CTRL_ATTR(c->dhchap_ctrl_key);
+ FREE_CTRL_ATTR(c->address);
+ FREE_CTRL_ATTR(c->dctype);
+ FREE_CTRL_ATTR(c->cntrltype);
+}
+
+int nvme_disconnect_ctrl(nvme_ctrl_t c)
+{
+ nvme_root_t r = c->s && c->s->h ? c->s->h->r : NULL;
+ int ret;
+
+ ret = nvme_set_attr(nvme_ctrl_get_sysfs_dir(c),
+ "delete_controller", "1");
+ if (ret < 0) {
+ nvme_msg(r, LOG_ERR, "%s: failed to disconnect, error %d\n",
+ c->name, errno);
+ return ret;
+ }
+ nvme_msg(r, LOG_INFO, "%s: %s disconnected\n", c->name, c->subsysnqn);
+ nvme_deconfigure_ctrl(c);
+ return 0;
+}
+
+void nvme_unlink_ctrl(nvme_ctrl_t c)
+{
+ list_del_init(&c->entry);
+ c->s = NULL;
+}
+
+static void __nvme_free_ctrl(nvme_ctrl_t c)
+{
+ struct nvme_path *p, *_p;
+ struct nvme_ns *n, *_n;
+
+ nvme_unlink_ctrl(c);
+
+ nvme_ctrl_for_each_path_safe(c, p, _p)
+ nvme_free_path(p);
+
+ nvme_ctrl_for_each_ns_safe(c, n, _n)
+ __nvme_free_ns(n);
+
+ nvme_deconfigure_ctrl(c);
+
+ FREE_CTRL_ATTR(c->transport);
+ FREE_CTRL_ATTR(c->subsysnqn);
+ FREE_CTRL_ATTR(c->traddr);
+ FREE_CTRL_ATTR(c->cfg.host_traddr);
+ FREE_CTRL_ATTR(c->cfg.host_iface);
+ FREE_CTRL_ATTR(c->trsvcid);
+ free(c);
+}
+
+void nvme_free_ctrl(nvme_ctrl_t c)
+{
+ __nvme_free_ctrl(c);
+}
+
+static bool traddr_is_hostname(const char *transport, const char *traddr)
+{
+ char addrstr[NVMF_TRADDR_SIZE];
+
+ if (!traddr || !transport)
+ return false;
+ if (!strcmp(traddr, "none"))
+ return false;
+ if (strcmp(transport, "tcp") &&
+ strcmp(transport, "rdma"))
+ return false;
+ if (inet_pton(AF_INET, traddr, addrstr) > 0 ||
+ inet_pton(AF_INET6, traddr, addrstr) > 0)
+ return false;
+ return true;
+}
+
+struct nvme_ctrl *nvme_create_ctrl(nvme_root_t r,
+ const char *subsysnqn, const char *transport,
+ const char *traddr, const char *host_traddr,
+ const char *host_iface, const char *trsvcid)
+{
+ struct nvme_ctrl *c;
+
+ if (!transport) {
+ nvme_msg(r, LOG_ERR, "No transport specified\n");
+ errno = EINVAL;
+ return NULL;
+ }
+ if (strncmp(transport, "loop", 4) &&
+ strncmp(transport, "pcie", 4) && !traddr) {
+ nvme_msg(r, LOG_ERR, "No transport address for '%s'\n",
+ transport);
+ errno = EINVAL;
+ return NULL;
+ }
+ if (!subsysnqn) {
+ nvme_msg(r, LOG_ERR, "No subsystem NQN specified\n");
+ errno = EINVAL;
+ return NULL;
+ }
+ c = calloc(1, sizeof(*c));
+ if (!c) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ c->fd = -1;
+ nvmf_default_config(&c->cfg);
+ list_head_init(&c->namespaces);
+ list_head_init(&c->paths);
+ list_node_init(&c->entry);
+ c->transport = strdup(transport);
+ c->subsysnqn = strdup(subsysnqn);
+ if (traddr)
+ c->traddr = strdup(traddr);
+ if (host_traddr) {
+ if (traddr_is_hostname(transport, host_traddr))
+ c->cfg.host_traddr = hostname2traddr(r, host_traddr);
+ if (!c->cfg.host_traddr)
+ c->cfg.host_traddr = strdup(host_traddr);
+ }
+ if (host_iface)
+ c->cfg.host_iface = strdup(host_iface);
+ if (trsvcid)
+ c->trsvcid = strdup(trsvcid);
+
+ return c;
+}
+
+nvme_ctrl_t __nvme_lookup_ctrl(nvme_subsystem_t s, const char *transport,
+ const char *traddr, const char *host_traddr,
+ const char *host_iface, const char *trsvcid,
+ nvme_ctrl_t p)
+
+{
+ struct nvme_ctrl *c;
+
+ c = p ? nvme_subsystem_next_ctrl(s, p) : nvme_subsystem_first_ctrl(s);
+ for (; c != NULL; c = nvme_subsystem_next_ctrl(s, c)) {
+ if (strcmp(c->transport, transport))
+ continue;
+ if (traddr && c->traddr &&
+ strcasecmp(c->traddr, traddr))
+ continue;
+ if (host_traddr && c->cfg.host_traddr &&
+ strcmp(c->cfg.host_traddr, host_traddr))
+ continue;
+ if (host_iface && c->cfg.host_iface &&
+ strcmp(c->cfg.host_iface, host_iface))
+ continue;
+ if (trsvcid && c->trsvcid &&
+ strcmp(c->trsvcid, trsvcid))
+ continue;
+ return c;
+ }
+
+ return NULL;
+}
+
+nvme_ctrl_t nvme_lookup_ctrl(nvme_subsystem_t s, const char *transport,
+ const char *traddr, const char *host_traddr,
+ const char *host_iface, const char *trsvcid,
+ nvme_ctrl_t p)
+{
+ nvme_root_t r;
+ struct nvme_ctrl *c;
+
+ if (!s || !transport)
+ return NULL;
+
+ c = __nvme_lookup_ctrl(s, transport, traddr, host_traddr,
+ host_iface, trsvcid, p);
+ if (c)
+ return c;
+
+ r = s->h ? s->h->r : NULL;
+ c = nvme_create_ctrl(r, s->subsysnqn, transport, traddr,
+ host_traddr, host_iface, trsvcid);
+ if (c) {
+ c->s = s;
+ list_add(&s->ctrls, &c->entry);
+ s->h->r->modified = true;
+ }
+ return c;
+}
+
+static int nvme_ctrl_scan_paths(nvme_root_t r, struct nvme_ctrl *c)
+{
+ struct dirent **paths;
+ int i, ret;
+
+ ret = nvme_scan_ctrl_namespace_paths(c, &paths);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < ret; i++)
+ nvme_ctrl_scan_path(r, c, paths[i]->d_name);
+
+ nvme_free_dirents(paths, i);
+ return 0;
+}
+
+static int nvme_ctrl_scan_namespaces(nvme_root_t r, struct nvme_ctrl *c)
+{
+ struct dirent **namespaces;
+ int i, ret;
+
+ ret = nvme_scan_ctrl_namespaces(c, &namespaces);
+ for (i = 0; i < ret; i++)
+ nvme_ctrl_scan_namespace(r, c, namespaces[i]->d_name);
+
+ nvme_free_dirents(namespaces, i);
+ return 0;
+}
+
+static char *nvme_ctrl_lookup_subsystem_name(nvme_root_t r,
+ const char *ctrl_name)
+{
+ struct dirent **subsys;
+ char *subsys_name = NULL;
+ int ret, i;
+
+ ret = nvme_scan_subsystems(&subsys);
+ if (ret < 0)
+ return NULL;
+ for (i = 0; i < ret; i++) {
+ struct stat st;
+ char *path;
+
+ if (asprintf(&path, "%s/%s/%s", nvme_subsys_sysfs_dir,
+ subsys[i]->d_name, ctrl_name) < 0) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ nvme_msg(r, LOG_DEBUG, "lookup subsystem %s\n", path);
+ if (stat(path, &st) < 0) {
+ free(path);
+ continue;
+ }
+ subsys_name = strdup(subsys[i]->d_name);
+ free(path);
+ break;
+ }
+ nvme_free_dirents(subsys, ret);
+ return subsys_name;
+}
+
+static int nvme_configure_ctrl(nvme_root_t r, nvme_ctrl_t c, const char *path,
+ const char *name)
+{
+ DIR *d;
+ char *host_key;
+
+ d = opendir(path);
+ if (!d) {
+ nvme_msg(r, LOG_ERR, "Failed to open ctrl dir %s, error %d\n",
+ path, errno);
+ errno = ENODEV;
+ return -1;
+ }
+ closedir(d);
+
+ c->fd = -1;
+ c->name = strdup(name);
+ c->sysfs_dir = (char *)path;
+ c->firmware = nvme_get_ctrl_attr(c, "firmware_rev");
+ c->model = nvme_get_ctrl_attr(c, "model");
+ c->state = nvme_get_ctrl_attr(c, "state");
+ c->numa_node = nvme_get_ctrl_attr(c, "numa_node");
+ c->queue_count = nvme_get_ctrl_attr(c, "queue_count");
+ c->serial = nvme_get_ctrl_attr(c, "serial");
+ c->sqsize = nvme_get_ctrl_attr(c, "sqsize");
+ host_key = nvme_get_ctrl_attr(c, "dhchap_secret");
+ if (host_key && c->s && c->s->h && c->s->h->dhchap_key &&
+ (!strcmp(c->s->h->dhchap_key, host_key) ||
+ !strcmp("none", host_key))) {
+ free(host_key);
+ host_key = NULL;
+ }
+ if (host_key)
+ c->dhchap_key = host_key;
+ c->dhchap_ctrl_key = nvme_get_ctrl_attr(c, "dhchap_ctrl_secret");
+ if (c->dhchap_ctrl_key && !strcmp(c->dhchap_ctrl_key, "none")) {
+ free(c->dhchap_ctrl_key);
+ c->dhchap_ctrl_key = NULL;
+ }
+ c->cntrltype = nvme_get_ctrl_attr(c, "cntrltype");
+ c->dctype = nvme_get_ctrl_attr(c, "dctype");
+
+ errno = 0; /* cleanup after nvme_get_ctrl_attr() */
+ return 0;
+}
+
+int nvme_init_ctrl(nvme_host_t h, nvme_ctrl_t c, int instance)
+{
+ nvme_subsystem_t s;
+ char *subsys_name = NULL;
+ char *path, *name;
+ int ret;
+
+ ret = asprintf(&name, "nvme%d", instance);
+ if (ret < 0) {
+ errno = ENOMEM;
+ return -1;
+ }
+ ret = asprintf(&path, "%s/nvme%d", nvme_ctrl_sysfs_dir, instance);
+ if (ret < 0) {
+ errno = ENOMEM;
+ goto out_free_name;
+ }
+
+ ret = nvme_configure_ctrl(h->r, c, path, name);
+ if (ret < 0) {
+ free(path);
+ goto out_free_name;
+ }
+
+ c->address = nvme_get_attr(path, "address");
+ if (!c->address && strcmp(c->transport, "loop")) {
+ errno = ENVME_CONNECT_INVAL_TR;
+ ret = -1;
+ goto out_free_name;
+ }
+
+ subsys_name = nvme_ctrl_lookup_subsystem_name(h->r, name);
+ if (!subsys_name) {
+ nvme_msg(h->r, LOG_ERR,
+ "Failed to lookup subsystem name for %s\n",
+ c->name);
+ errno = ENVME_CONNECT_LOOKUP_SUBSYS_NAME;
+ ret = -1;
+ goto out_free_name;
+ }
+ s = nvme_lookup_subsystem(h, subsys_name, c->subsysnqn);
+ if (!s) {
+ errno = ENVME_CONNECT_LOOKUP_SUBSYS;
+ ret = -1;
+ goto out_free_subsys;
+ }
+ if (s->subsystype && !strcmp(s->subsystype, "discovery"))
+ c->discovery_ctrl = true;
+ c->s = s;
+ list_add(&s->ctrls, &c->entry);
+out_free_subsys:
+ free(subsys_name);
+ out_free_name:
+ free(name);
+ return ret;
+}
+
+static nvme_ctrl_t nvme_ctrl_alloc(nvme_root_t r, nvme_subsystem_t s,
+ const char *path, const char *name)
+{
+ nvme_ctrl_t c, p;
+ char *addr = NULL, *address = NULL, *a, *e;
+ char *transport, *traddr = NULL, *trsvcid = NULL;
+ char *host_traddr = NULL, *host_iface = NULL;
+ int ret;
+
+ transport = nvme_get_attr(path, "transport");
+ if (!transport) {
+ errno = ENXIO;
+ return NULL;
+ }
+ /* Parse 'address' string into components */
+ addr = nvme_get_attr(path, "address");
+ if (!addr) {
+ char *rpath = NULL, *p = NULL, *_a = NULL;
+
+ /* loop transport might not have an address */
+ if (!strcmp(transport, "loop"))
+ goto skip_address;
+
+ /* Older kernel don't support pcie transport addresses */
+ if (strcmp(transport, "pcie")) {
+ free(transport);
+ errno = ENXIO;
+ return NULL;
+ }
+ /* Figure out the PCI address from the attribute path */
+ rpath = realpath(path, NULL);
+ if (!rpath) {
+ free(transport);
+ errno = ENOMEM;
+ return NULL;
+ }
+ a = strtok_r(rpath, "/", &e);
+ while(a && strlen(a)) {
+ if (_a)
+ p = _a;
+ _a = a;
+ if (!strncmp(a, "nvme", 4))
+ break;
+ a = strtok_r(NULL, "/", &e);
+ }
+ if (p)
+ addr = strdup(p);
+ free(rpath);
+ } else if (!strcmp(transport, "pcie")) {
+ /* The 'address' string is the transport address */
+ traddr = addr;
+ } else {
+ address = strdup(addr);
+ a = strtok_r(address, ",", &e);
+ while (a && strlen(a)) {
+ if (!strncmp(a, "traddr=", 7))
+ traddr = a + 7;
+ else if (!strncmp(a, "trsvcid=", 8))
+ trsvcid = a + 8;
+ else if (!strncmp(a, "host_traddr=", 12))
+ host_traddr = a + 12;
+ else if (!strncmp(a, "host_iface=", 11))
+ host_iface = a + 11;
+ a = strtok_r(NULL, ",", &e);
+ }
+ }
+skip_address:
+ p = NULL;
+ do {
+ c = nvme_lookup_ctrl(s, transport, traddr,
+ host_traddr, host_iface, trsvcid, p);
+ if (c) {
+ if (!c->name)
+ break;
+ if (!strcmp(c->name, name)) {
+ nvme_msg(r, LOG_DEBUG,
+ "found existing ctrl %s\n", c->name);
+ break;
+ }
+ nvme_msg(r, LOG_DEBUG, "skipping ctrl %s\n", c->name);
+ p = c;
+ }
+ } while (c);
+ if (!c)
+ c = p;
+ free(transport);
+ if (address)
+ free(address);
+ if (!c && !p) {
+ nvme_msg(r, LOG_ERR, "failed to lookup ctrl\n");
+ errno = ENODEV;
+ free(addr);
+ return NULL;
+ }
+ c->address = addr;
+ if (s->subsystype && !strcmp(s->subsystype, "discovery"))
+ c->discovery_ctrl = true;
+ ret = nvme_configure_ctrl(r, c, path, name);
+ return (ret < 0) ? NULL : c;
+}
+
+nvme_ctrl_t nvme_scan_ctrl(nvme_root_t r, const char *name)
+{
+ nvme_host_t h;
+ nvme_subsystem_t s;
+ nvme_ctrl_t c;
+ char *path;
+ char *hostnqn, *hostid, *subsysnqn, *subsysname;
+ int ret;
+
+ nvme_msg(r, LOG_DEBUG, "scan controller %s\n", name);
+ ret = asprintf(&path, "%s/%s", nvme_ctrl_sysfs_dir, name);
+ if (ret < 0) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ hostnqn = nvme_get_attr(path, "hostnqn");
+ hostid = nvme_get_attr(path, "hostid");
+ h = nvme_lookup_host(r, hostnqn, hostid);
+ if (hostnqn)
+ free(hostnqn);
+ if (hostid)
+ free(hostid);
+ if (h) {
+ if (h->dhchap_key)
+ free(h->dhchap_key);
+ h->dhchap_key = nvme_get_attr(path, "dhchap_secret");
+ if (h->dhchap_key && !strcmp(h->dhchap_key, "none")) {
+ free(h->dhchap_key);
+ h->dhchap_key = NULL;
+ }
+ }
+ if (!h) {
+ h = nvme_default_host(r);
+ if (!h) {
+ free(path);
+ errno = ENOMEM;
+ return NULL;
+ }
+ }
+
+ subsysnqn = nvme_get_attr(path, "subsysnqn");
+ if (!subsysnqn) {
+ free(path);
+ errno = ENXIO;
+ return NULL;
+ }
+ subsysname = nvme_ctrl_lookup_subsystem_name(r, name);
+ if (!subsysname) {
+ nvme_msg(r, LOG_ERR,
+ "failed to lookup subsystem for controller %s\n",
+ name);
+ free(subsysnqn);
+ free(path);
+ errno = ENXIO;
+ return NULL;
+ }
+ s = nvme_lookup_subsystem(h, subsysname, subsysnqn);
+ free(subsysnqn);
+ free(subsysname);
+
+ if (!s) {
+ free(path);
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ c = nvme_ctrl_alloc(r, s, path, name);
+ if (!c) {
+ free(path);
+ return NULL;
+ }
+
+ nvme_ctrl_scan_namespaces(r, c);
+ nvme_ctrl_scan_paths(r, c);
+ return c;
+}
+
+void nvme_rescan_ctrl(struct nvme_ctrl *c)
+{
+ nvme_root_t r = c->s && c->s->h ? c->s->h->r : NULL;
+ if (!c->s)
+ return;
+ nvme_ctrl_scan_namespaces(r, c);
+ nvme_ctrl_scan_paths(r, c);
+ nvme_subsystem_scan_namespaces(r, c->s, NULL, NULL);
+}
+
+static int nvme_bytes_to_lba(nvme_ns_t n, off_t offset, size_t count,
+ __u64 *lba, __u16 *nlb)
+{
+ int bs;
+
+ bs = nvme_ns_get_lba_size(n);
+ if (!count || offset & bs || count & bs) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ *lba = offset >> n->lba_shift;
+ *nlb = (count >> n->lba_shift) - 1;
+ return 0;
+}
+
+int nvme_ns_get_fd(nvme_ns_t n)
+{
+ return n->fd;
+}
+
+nvme_subsystem_t nvme_ns_get_subsystem(nvme_ns_t n)
+{
+ return n->s;
+}
+
+nvme_ctrl_t nvme_ns_get_ctrl(nvme_ns_t n)
+{
+ return n->c;
+}
+
+int nvme_ns_get_nsid(nvme_ns_t n)
+{
+ return n->nsid;
+}
+
+const char *nvme_ns_get_sysfs_dir(nvme_ns_t n)
+{
+ return n->sysfs_dir;
+}
+
+const char *nvme_ns_get_name(nvme_ns_t n)
+{
+ return n->name;
+}
+
+const char *nvme_ns_get_generic_name(nvme_ns_t n)
+{
+ return n->generic_name;
+}
+
+const char *nvme_ns_get_model(nvme_ns_t n)
+{
+ return n->c ? n->c->model : n->s->model;
+}
+
+const char *nvme_ns_get_serial(nvme_ns_t n)
+{
+ return n->c ? n->c->serial : n->s->serial;
+}
+
+const char *nvme_ns_get_firmware(nvme_ns_t n)
+{
+ return n->c ? n->c->firmware : n->s->firmware;
+}
+
+int nvme_ns_get_lba_size(nvme_ns_t n)
+{
+ return n->lba_size;
+}
+
+int nvme_ns_get_meta_size(nvme_ns_t n)
+{
+ return n->meta_size;
+}
+
+uint64_t nvme_ns_get_lba_count(nvme_ns_t n)
+{
+ return n->lba_count;
+}
+
+uint64_t nvme_ns_get_lba_util(nvme_ns_t n)
+{
+ return n->lba_util;
+}
+
+enum nvme_csi nvme_ns_get_csi(nvme_ns_t n)
+{
+ return n->csi;
+}
+
+const uint8_t *nvme_ns_get_eui64(nvme_ns_t n)
+{
+ return n->eui64;
+}
+
+const uint8_t *nvme_ns_get_nguid(nvme_ns_t n)
+{
+ return n->nguid;
+}
+
+void nvme_ns_get_uuid(nvme_ns_t n, unsigned char out[NVME_UUID_LEN])
+{
+ memcpy(out, n->uuid, NVME_UUID_LEN);
+}
+
+int nvme_ns_identify(nvme_ns_t n, struct nvme_id_ns *ns)
+{
+ return nvme_identify_ns(nvme_ns_get_fd(n), nvme_ns_get_nsid(n), ns);
+}
+
+int nvme_ns_identify_descs(nvme_ns_t n, struct nvme_ns_id_desc *descs)
+{
+ return nvme_identify_ns_descs(nvme_ns_get_fd(n), nvme_ns_get_nsid(n), descs);
+}
+
+int nvme_ns_verify(nvme_ns_t n, off_t offset, size_t count)
+{
+ struct nvme_io_args args = {
+ .args_size = sizeof(args),
+ .fd = nvme_ns_get_fd(n),
+ .nsid = nvme_ns_get_nsid(n),
+ .control = 0,
+ .dsm = 0,
+ .dspec = 0,
+ .reftag = 0,
+ .apptag = 0,
+ .appmask = 0,
+ .storage_tag = 0,
+ .data_len = 0,
+ .data = NULL,
+ .metadata_len = 0,
+ .metadata = NULL,
+ .timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+ .result = NULL,
+ };
+
+ if (nvme_bytes_to_lba(n, offset, count, &args.slba, &args.nlb))
+ return -1;
+
+ return nvme_verify(&args);
+}
+
+int nvme_ns_write_uncorrectable(nvme_ns_t n, off_t offset, size_t count)
+{
+ struct nvme_io_args args = {
+ .args_size = sizeof(args),
+ .fd = nvme_ns_get_fd(n),
+ .nsid = nvme_ns_get_nsid(n),
+ .control = 0,
+ .dsm = 0,
+ .dspec = 0,
+ .reftag = 0,
+ .apptag = 0,
+ .appmask = 0,
+ .storage_tag = 0,
+ .data_len = 0,
+ .data = NULL,
+ .metadata_len = 0,
+ .metadata = NULL,
+ .timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+ .result = NULL,
+ };
+
+ if (nvme_bytes_to_lba(n, offset, count, &args.slba, &args.nlb))
+ return -1;
+
+ return nvme_write_uncorrectable(&args);
+}
+
+int nvme_ns_write_zeros(nvme_ns_t n, off_t offset, size_t count)
+{
+ struct nvme_io_args args = {
+ .args_size = sizeof(args),
+ .fd = nvme_ns_get_fd(n),
+ .nsid = nvme_ns_get_nsid(n),
+ .control = 0,
+ .dsm = 0,
+ .dspec = 0,
+ .reftag = 0,
+ .apptag = 0,
+ .appmask = 0,
+ .storage_tag = 0,
+ .data_len = 0,
+ .data = NULL,
+ .metadata_len = 0,
+ .metadata = NULL,
+ .timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+ .result = NULL,
+ };
+
+ if (nvme_bytes_to_lba(n, offset, count, &args.slba, &args.nlb))
+ return -1;
+
+ return nvme_write_zeros(&args);
+}
+
+int nvme_ns_write(nvme_ns_t n, void *buf, off_t offset, size_t count)
+{
+ struct nvme_io_args args = {
+ .args_size = sizeof(args),
+ .fd = nvme_ns_get_fd(n),
+ .nsid = nvme_ns_get_nsid(n),
+ .control = 0,
+ .dsm = 0,
+ .dspec = 0,
+ .reftag = 0,
+ .apptag = 0,
+ .appmask = 0,
+ .storage_tag = 0,
+ .data_len = count,
+ .data = buf,
+ .metadata_len = 0,
+ .metadata = NULL,
+ .timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+ .result = NULL,
+ };
+
+ if (nvme_bytes_to_lba(n, offset, count, &args.slba, &args.nlb))
+ return -1;
+
+ return nvme_write(&args);
+}
+
+int nvme_ns_read(nvme_ns_t n, void *buf, off_t offset, size_t count)
+{
+ struct nvme_io_args args = {
+ .args_size = sizeof(args),
+ .fd = nvme_ns_get_fd(n),
+ .nsid = nvme_ns_get_nsid(n),
+ .control = 0,
+ .dsm = 0,
+ .dspec = 0,
+ .reftag = 0,
+ .apptag = 0,
+ .appmask = 0,
+ .storage_tag = 0,
+ .data_len = count,
+ .data = buf,
+ .metadata_len = 0,
+ .metadata = NULL,
+ .timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+ .result = NULL,
+ };
+
+ if (nvme_bytes_to_lba(n, offset, count, &args.slba, &args.nlb))
+ return -1;
+
+ return nvme_read(&args);
+}
+
+int nvme_ns_compare(nvme_ns_t n, void *buf, off_t offset, size_t count)
+{
+ struct nvme_io_args args = {
+ .args_size = sizeof(args),
+ .fd = nvme_ns_get_fd(n),
+ .nsid = nvme_ns_get_nsid(n),
+ .control = 0,
+ .dsm = 0,
+ .dspec = 0,
+ .reftag = 0,
+ .apptag = 0,
+ .appmask = 0,
+ .storage_tag = 0,
+ .data_len = count,
+ .data = buf,
+ .metadata_len = 0,
+ .metadata = NULL,
+ .timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+ .result = NULL,
+ };
+
+ if (nvme_bytes_to_lba(n, offset, count, &args.slba, &args.nlb))
+ return -1;
+
+ return nvme_compare(&args);
+}
+
+int nvme_ns_flush(nvme_ns_t n)
+{
+ return nvme_flush(nvme_ns_get_fd(n), nvme_ns_get_nsid(n));
+}
+
+static void nvme_ns_parse_descriptors(struct nvme_ns *n,
+ struct nvme_ns_id_desc *descs)
+{
+ void *d = descs;
+ int i, len;
+
+ for (i = 0; i < NVME_IDENTIFY_DATA_SIZE; i += len) {
+ struct nvme_ns_id_desc *desc = d + i;
+
+ if (!desc->nidl)
+ break;
+ len = desc->nidl + sizeof(*desc);
+
+ switch (desc->nidt) {
+ case NVME_NIDT_EUI64:
+ memcpy(n->eui64, desc->nid, sizeof(n->eui64));
+ break;
+ case NVME_NIDT_NGUID:
+ memcpy(n->nguid, desc->nid, sizeof(n->nguid));
+ break;
+ case NVME_NIDT_UUID:
+ memcpy(n->uuid, desc->nid, sizeof(n->uuid));
+ break;
+ case NVME_NIDT_CSI:
+ memcpy(&n->csi, desc->nid, sizeof(n->csi));
+ break;
+ }
+ }
+}
+
+static int nvme_ns_init(struct nvme_ns *n)
+{
+ struct nvme_id_ns ns = { };
+ uint8_t buffer[NVME_IDENTIFY_DATA_SIZE] = { };
+ struct nvme_ns_id_desc *descs = (void *)buffer;
+ uint8_t flbas;
+ int ret;
+
+ ret = nvme_ns_identify(n, &ns);
+ if (ret)
+ return ret;
+
+ nvme_id_ns_flbas_to_lbaf_inuse(ns.flbas, &flbas);
+ n->lba_shift = ns.lbaf[flbas].ds;
+ n->lba_size = 1 << n->lba_shift;
+ n->lba_count = le64_to_cpu(ns.nsze);
+ n->lba_util = le64_to_cpu(ns.nuse);
+ n->meta_size = le16_to_cpu(ns.lbaf[flbas].ms);
+
+ if (!nvme_ns_identify_descs(n, descs))
+ nvme_ns_parse_descriptors(n, descs);
+
+ return 0;
+}
+
+static void nvme_ns_set_generic_name(struct nvme_ns *n, const char *name)
+{
+ char generic_name[PATH_MAX];
+ int instance, head_instance;
+ int ret;
+
+ ret = sscanf(name, "nvme%dn%d", &instance, &head_instance);
+ if (ret != 2)
+ return;
+
+ sprintf(generic_name, "ng%dn%d", instance, head_instance);
+ n->generic_name = strdup(generic_name);
+}
+
+static nvme_ns_t nvme_ns_open(const char *name)
+{
+ struct nvme_ns *n;
+
+ n = calloc(1, sizeof(*n));
+ if (!n) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ n->name = strdup(name);
+ n->fd = nvme_open(n->name);
+ if (n->fd < 0)
+ goto free_ns;
+
+ nvme_ns_set_generic_name(n, name);
+
+ if (nvme_get_nsid(n->fd, &n->nsid) < 0)
+ goto close_fd;
+
+ if (nvme_ns_init(n) != 0)
+ goto close_fd;
+
+ list_head_init(&n->paths);
+ list_node_init(&n->entry);
+
+ return n;
+
+close_fd:
+ close(n->fd);
+free_ns:
+ free(n->generic_name);
+ free(n->name);
+ free(n);
+ return NULL;
+}
+
+static struct nvme_ns *__nvme_scan_namespace(const char *sysfs_dir, const char *name)
+{
+ struct nvme_ns *n;
+ char *path;
+ int ret;
+
+ ret = asprintf(&path, "%s/%s", sysfs_dir, name);
+ if (ret < 0) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ n = nvme_ns_open(name);
+ if (!n)
+ goto free_path;
+
+ n->sysfs_dir = path;
+ return n;
+
+free_path:
+ free(path);
+ return NULL;
+}
+
+nvme_ns_t nvme_scan_namespace(const char *name)
+{
+ return __nvme_scan_namespace(nvme_ns_sysfs_dir, name);
+}
+
+static int nvme_ctrl_scan_namespace(nvme_root_t r, struct nvme_ctrl *c,
+ char *name)
+{
+ struct nvme_ns *n, *_n, *__n;
+
+ nvme_msg(r, LOG_DEBUG, "scan controller %s namespace %s\n",
+ c->name, name);
+ if (!c->s) {
+ nvme_msg(r, LOG_DEBUG, "no subsystem for %s\n", name);
+ errno = EINVAL;
+ return -1;
+ }
+ n = __nvme_scan_namespace(c->sysfs_dir, name);
+ if (!n) {
+ nvme_msg(r, LOG_DEBUG, "failed to scan namespace %s\n", name);
+ return -1;
+ }
+ nvme_ctrl_for_each_ns_safe(c, _n, __n) {
+ if (strcmp(n->name, _n->name))
+ continue;
+ __nvme_free_ns(_n);
+ }
+ n->s = c->s;
+ n->c = c;
+ list_add(&c->namespaces, &n->entry);
+ return 0;
+}
+
+static void nvme_subsystem_set_ns_path(nvme_subsystem_t s, nvme_ns_t n)
+{
+ nvme_ctrl_t c;
+ nvme_path_t p;
+ int ns_ctrl, ns_nsid, ret;
+
+ ret = sscanf(nvme_ns_get_name(n), "nvme%dn%d", &ns_ctrl, &ns_nsid);
+ if (ret != 2)
+ return;
+
+ nvme_subsystem_for_each_ctrl(s, c) {
+ nvme_ctrl_for_each_path(c, p) {
+ int p_subsys, p_ctrl, p_nsid;
+
+ ret = sscanf(nvme_path_get_name(p), "nvme%dc%dn%d",
+ &p_subsys, &p_ctrl, &p_nsid);
+ if (ret != 3)
+ continue;
+ if (ns_ctrl == p_subsys && ns_nsid == p_nsid) {
+ list_add(&n->paths, &p->nentry);
+ p->n = n;
+ }
+ }
+ }
+}
+
+static int nvme_subsystem_scan_namespace(nvme_root_t r, nvme_subsystem_t s,
+ char *name, nvme_scan_filter_t f, void *f_args)
+{
+ struct nvme_ns *n, *_n, *__n;
+
+ nvme_msg(r, LOG_DEBUG, "scan subsystem %s namespace %s\n",
+ s->name, name);
+ n = __nvme_scan_namespace(s->sysfs_dir, name);
+ if (!n) {
+ nvme_msg(r, LOG_DEBUG, "failed to scan namespace %s\n", name);
+ return -1;
+ }
+ if (f && !f(NULL, NULL, n, f_args)) {
+ nvme_msg(r, LOG_DEBUG, "filter out namespace %s\n", name);
+ __nvme_free_ns(n);
+ return 0;
+ }
+ nvme_subsystem_for_each_ns_safe(s, _n, __n) {
+ struct nvme_path *p, *_p;
+
+ if (strcmp(n->name, _n->name))
+ continue;
+ /* Detach paths */
+ nvme_namespace_for_each_path_safe(_n, p, _p) {
+ list_del_init(&p->nentry);
+ p->n = NULL;
+ }
+ list_head_init(&_n->paths);
+ __nvme_free_ns(_n);
+ }
+ n->s = s;
+ list_add(&s->namespaces, &n->entry);
+ nvme_subsystem_set_ns_path(s, n);
+ return 0;
+}
+
+struct nvme_ns *nvme_subsystem_lookup_namespace(struct nvme_subsystem *s,
+ __u32 nsid)
+{
+ struct nvme_ns *n;
+
+ nvme_subsystem_for_each_ns(s, n) {
+ if (nvme_ns_get_nsid(n) == nsid)
+ return n;
+ }
+ return NULL;
+}