diff options
Diffstat (limited to 'src/nvme/json.c')
| -rw-r--r-- | src/nvme/json.c | 527 |
1 files changed, 527 insertions, 0 deletions
diff --git a/src/nvme/json.c b/src/nvme/json.c new file mode 100644 index 0000000..072b622 --- /dev/null +++ b/src/nvme/json.c @@ -0,0 +1,527 @@ +// SPDX-License-Identifier: LGPL-2.1-or-later +/* + * This file is part of libnvme. + * Copyright (c) 2021 SUSE Software Solutions + * + * Authors: Hannes Reinecke <hare@suse.de> + */ + +#include <stdio.h> +#include <errno.h> +#include <string.h> +#include <unistd.h> +#include <fcntl.h> + +#include <json.h> + +#include "fabrics.h" +#include "log.h" +#include "private.h" + +#define JSON_UPDATE_INT_OPTION(c, k, a, o) \ + if (!strcmp(# a, k ) && !c->a) c->a = json_object_get_int(o); +#define JSON_UPDATE_BOOL_OPTION(c, k, a, o) \ + if (!strcmp(# a, k ) && !c->a) c->a = json_object_get_boolean(o); + +static void json_update_attributes(nvme_ctrl_t c, + struct json_object *ctrl_obj) +{ + struct nvme_fabrics_config *cfg = nvme_ctrl_get_config(c); + + json_object_object_foreach(ctrl_obj, key_str, val_obj) { + JSON_UPDATE_INT_OPTION(cfg, key_str, + nr_io_queues, val_obj); + JSON_UPDATE_INT_OPTION(cfg, key_str, + nr_write_queues, val_obj); + JSON_UPDATE_INT_OPTION(cfg, key_str, + nr_poll_queues, val_obj); + JSON_UPDATE_INT_OPTION(cfg, key_str, + queue_size, val_obj); + JSON_UPDATE_INT_OPTION(cfg, key_str, + keep_alive_tmo, val_obj); + JSON_UPDATE_INT_OPTION(cfg, key_str, + reconnect_delay, val_obj); + if (!strcmp("ctrl_loss_tmo", key_str) && + cfg->ctrl_loss_tmo != NVMF_DEF_CTRL_LOSS_TMO) + cfg->ctrl_loss_tmo = json_object_get_int(val_obj); + JSON_UPDATE_INT_OPTION(cfg, key_str, + fast_io_fail_tmo, val_obj); + if (!strcmp("tos", key_str) && cfg->tos != -1) + cfg->tos = json_object_get_int(val_obj); + JSON_UPDATE_BOOL_OPTION(cfg, key_str, + duplicate_connect, val_obj); + JSON_UPDATE_BOOL_OPTION(cfg, key_str, + disable_sqflow, val_obj); + JSON_UPDATE_BOOL_OPTION(cfg, key_str, + hdr_digest, val_obj); + JSON_UPDATE_BOOL_OPTION(cfg, key_str, + data_digest, val_obj); + JSON_UPDATE_BOOL_OPTION(cfg, key_str, + tls, val_obj); + if (!strcmp("persistent", key_str) && + !nvme_ctrl_is_persistent(c)) + nvme_ctrl_set_persistent(c, true); + if (!strcmp("discovery", key_str) && + !nvme_ctrl_is_discovery_ctrl(c)) + nvme_ctrl_set_discovery_ctrl(c, true); + } +} + +static void json_parse_port(nvme_subsystem_t s, struct json_object *port_obj) +{ + nvme_ctrl_t c; + struct json_object *attr_obj; + const char *transport, *traddr = NULL; + const char *host_traddr = NULL, *host_iface = NULL, *trsvcid = NULL; + + attr_obj = json_object_object_get(port_obj, "transport"); + if (!attr_obj) + return; + transport = json_object_get_string(attr_obj); + attr_obj = json_object_object_get(port_obj, "traddr"); + if (attr_obj) + traddr = json_object_get_string(attr_obj); + attr_obj = json_object_object_get(port_obj, "host_traddr"); + if (attr_obj) + host_traddr = json_object_get_string(attr_obj); + attr_obj = json_object_object_get(port_obj, "host_iface"); + if (attr_obj) + host_iface = json_object_get_string(attr_obj); + attr_obj = json_object_object_get(port_obj, "trsvcid"); + if (attr_obj) + trsvcid = json_object_get_string(attr_obj); + c = nvme_lookup_ctrl(s, transport, traddr, host_traddr, + host_iface, trsvcid, NULL); + if (!c) + return; + json_update_attributes(c, port_obj); + attr_obj = json_object_object_get(port_obj, "dhchap_key"); + if (attr_obj) + nvme_ctrl_set_dhchap_host_key(c, json_object_get_string(attr_obj)); + attr_obj = json_object_object_get(port_obj, "dhchap_ctrl_key"); + if (attr_obj) + nvme_ctrl_set_dhchap_key(c, json_object_get_string(attr_obj)); +} + +static void json_parse_subsys(nvme_host_t h, struct json_object *subsys_obj) +{ + struct json_object *nqn_obj, *port_array; + nvme_subsystem_t s; + const char *nqn; + int p; + + nqn_obj = json_object_object_get(subsys_obj, "nqn"); + if (!nqn_obj) + return; + nqn = json_object_get_string(nqn_obj); + s = nvme_lookup_subsystem(h, NULL, nqn); + port_array = json_object_object_get(subsys_obj, "ports"); + if (!port_array) + return; + for (p = 0; p < json_object_array_length(port_array); p++) { + struct json_object *port_obj; + + port_obj = json_object_array_get_idx(port_array, p); + if (port_obj) + json_parse_port(s, port_obj); + } +} + +static void json_parse_host(nvme_root_t r, struct json_object *host_obj) +{ + struct json_object *attr_obj, *subsys_array, *subsys_obj; + nvme_host_t h; + const char *hostnqn, *hostid = NULL; + int s; + + attr_obj = json_object_object_get(host_obj, "hostnqn"); + if (!attr_obj) + return; + hostnqn = json_object_get_string(attr_obj); + attr_obj = json_object_object_get(host_obj, "hostid"); + if (attr_obj) + hostid = json_object_get_string(attr_obj); + h = nvme_lookup_host(r, hostnqn, hostid); + attr_obj = json_object_object_get(host_obj, "dhchap_key"); + if (attr_obj) + nvme_host_set_dhchap_key(h, json_object_get_string(attr_obj)); + attr_obj = json_object_object_get(host_obj, "hostsymname"); + if (attr_obj) + nvme_host_set_hostsymname(h, json_object_get_string(attr_obj)); + attr_obj = json_object_object_get(host_obj, "persistent_discovery_ctrl"); + if (attr_obj) + nvme_host_set_pdc_enabled(h, json_object_get_boolean(attr_obj)); + subsys_array = json_object_object_get(host_obj, "subsystems"); + if (!subsys_array) + return; + for (s = 0; s < json_object_array_length(subsys_array); s++) { + subsys_obj = json_object_array_get_idx(subsys_array, s); + if (subsys_obj) + json_parse_subsys(h, subsys_obj); + } +} + +static struct json_object *parse_json(nvme_root_t r, int fd) +{ + char buf[JSON_FILE_BUF_SIZE]; + struct json_object *obj = NULL; + struct printbuf *pb; + json_tokener *tok = NULL; + int ret; + + pb = printbuf_new(); + if (!pb) + return NULL; + + while ((ret = read(fd, buf, JSON_FILE_BUF_SIZE)) > 0) + printbuf_memappend(pb, buf, ret); + + if (ret < 0) + goto out; + + tok = json_tokener_new_ex(JSON_TOKENER_DEFAULT_DEPTH); + if (!tok) + goto out; + + /* Enforce correctly formatted JSON */ + tok->flags = JSON_TOKENER_STRICT; + + obj = json_tokener_parse_ex(tok, pb->buf, printbuf_length(pb)); + if (!obj) + nvme_msg(r, LOG_DEBUG, "JSON parsing failed: %s\n", + json_util_get_last_err()); +out: + if (tok) + json_tokener_free(tok); + printbuf_free(pb); + + return obj; +} + +int json_read_config(nvme_root_t r, const char *config_file) +{ + struct json_object *json_root, *host_obj; + int fd, h; + + fd = open(config_file, O_RDONLY); + if (fd < 0) { + nvme_msg(r, LOG_DEBUG, "Error opening %s, %s\n", + config_file, strerror(errno)); + return fd; + } + json_root = parse_json(r, fd); + close(fd); + if (!json_root) { + errno = EPROTO; + return -1; + } + if (!json_object_is_type(json_root, json_type_array)) { + nvme_msg(r, LOG_DEBUG, "Wrong format, expected array\n"); + json_object_put(json_root); + errno = EPROTO; + return -1; + } + for (h = 0; h < json_object_array_length(json_root); h++) { + host_obj = json_object_array_get_idx(json_root, h); + if (host_obj) + json_parse_host(r, host_obj); + } + json_object_put(json_root); + return 0; +} + +#define JSON_STRING_OPTION(c, p, o) \ + if ((c)->o && strcmp((c)->o, "none")) \ + json_object_object_add((p), # o , \ + json_object_new_string((c)->o)) +#define JSON_INT_OPTION(c, p, o, d) \ + if ((c)->o != d) \ + json_object_object_add((p), # o , \ + json_object_new_int((c)->o)) +#define JSON_BOOL_OPTION(c, p, o) \ + if ((c)->o) \ + json_object_object_add((p), # o , \ + json_object_new_boolean((c)->o)) + +static void json_update_port(struct json_object *ctrl_array, nvme_ctrl_t c) +{ + struct nvme_fabrics_config *cfg = nvme_ctrl_get_config(c); + struct json_object *port_obj = json_object_new_object(); + const char *transport, *value; + + transport = nvme_ctrl_get_transport(c); + json_object_object_add(port_obj, "transport", + json_object_new_string(transport)); + value = nvme_ctrl_get_traddr(c); + if (value) + json_object_object_add(port_obj, "traddr", + json_object_new_string(value)); + value = nvme_ctrl_get_host_traddr(c); + if (value) + json_object_object_add(port_obj, "host_traddr", + json_object_new_string(value)); + value = nvme_ctrl_get_host_iface(c); + if (value) + json_object_object_add(port_obj, "host_iface", + json_object_new_string(value)); + value = nvme_ctrl_get_trsvcid(c); + if (value) + json_object_object_add(port_obj, "trsvcid", + json_object_new_string(value)); + value = nvme_ctrl_get_dhchap_host_key(c); + if (value) + json_object_object_add(port_obj, "dhchap_key", + json_object_new_string(value)); + value = nvme_ctrl_get_dhchap_key(c); + if (value) + json_object_object_add(port_obj, "dhchap_ctrl_key", + json_object_new_string(value)); + JSON_INT_OPTION(cfg, port_obj, nr_io_queues, 0); + JSON_INT_OPTION(cfg, port_obj, nr_write_queues, 0); + JSON_INT_OPTION(cfg, port_obj, nr_poll_queues, 0); + JSON_INT_OPTION(cfg, port_obj, queue_size, 0); + JSON_INT_OPTION(cfg, port_obj, keep_alive_tmo, 0); + JSON_INT_OPTION(cfg, port_obj, reconnect_delay, 0); + if (strcmp(transport, "loop")) { + JSON_INT_OPTION(cfg, port_obj, ctrl_loss_tmo, + NVMF_DEF_CTRL_LOSS_TMO); + JSON_INT_OPTION(cfg, port_obj, fast_io_fail_tmo, 0); + } + JSON_INT_OPTION(cfg, port_obj, tos, -1); + JSON_BOOL_OPTION(cfg, port_obj, duplicate_connect); + JSON_BOOL_OPTION(cfg, port_obj, disable_sqflow); + JSON_BOOL_OPTION(cfg, port_obj, hdr_digest); + JSON_BOOL_OPTION(cfg, port_obj, data_digest); + JSON_BOOL_OPTION(cfg, port_obj, tls); + if (nvme_ctrl_is_persistent(c)) + json_object_object_add(port_obj, "persistent", + json_object_new_boolean(true)); + if (nvme_ctrl_is_discovery_ctrl(c)) + json_object_object_add(port_obj, "discovery", + json_object_new_boolean(true)); + json_object_array_add(ctrl_array, port_obj); +} + +static void json_update_subsys(struct json_object *subsys_array, + nvme_subsystem_t s) +{ + nvme_ctrl_t c; + const char *subsysnqn = nvme_subsystem_get_nqn(s); + struct json_object *subsys_obj = json_object_new_object(); + struct json_object *port_array; + + /* Skip discovery subsystems as the nqn is not unique */ + if (!strcmp(subsysnqn, NVME_DISC_SUBSYS_NAME)) + return; + + json_object_object_add(subsys_obj, "nqn", + json_object_new_string(subsysnqn)); + port_array = json_object_new_array(); + nvme_subsystem_for_each_ctrl(s, c) { + json_update_port(port_array, c); + } + if (json_object_array_length(port_array)) + json_object_object_add(subsys_obj, "ports", port_array); + else + json_object_put(port_array); + json_object_array_add(subsys_array, subsys_obj); +} + +int json_update_config(nvme_root_t r, const char *config_file) +{ + nvme_host_t h; + struct json_object *json_root, *host_obj; + struct json_object *subsys_array; + int ret = 0; + + json_root = json_object_new_array(); + nvme_for_each_host(r, h) { + nvme_subsystem_t s; + const char *hostnqn, *hostid, *dhchap_key, *hostsymname; + + host_obj = json_object_new_object(); + if (!host_obj) + continue; + hostnqn = nvme_host_get_hostnqn(h); + json_object_object_add(host_obj, "hostnqn", + json_object_new_string(hostnqn)); + hostid = nvme_host_get_hostid(h); + if (hostid) + json_object_object_add(host_obj, "hostid", + json_object_new_string(hostid)); + dhchap_key = nvme_host_get_dhchap_key(h); + if (dhchap_key) + json_object_object_add(host_obj, "dhchap_key", + json_object_new_string(dhchap_key)); + hostsymname = nvme_host_get_hostsymname(h); + if (hostsymname) + json_object_object_add(host_obj, "hostsymname", + json_object_new_string(hostsymname)); + if (h->pdc_enabled_valid) + json_object_object_add(host_obj, "persistent_discovery_ctrl", + json_object_new_boolean(h->pdc_enabled)); + subsys_array = json_object_new_array(); + nvme_for_each_subsystem(h, s) { + json_update_subsys(subsys_array, s); + } + if (json_object_array_length(subsys_array)) + json_object_object_add(host_obj, "subsystems", + subsys_array); + else + json_object_put(subsys_array); + json_object_array_add(json_root, host_obj); + } + if (!config_file) { + ret = json_object_to_fd(1, json_root, JSON_C_TO_STRING_PRETTY); + printf("\n"); + } else + ret = json_object_to_file_ext(config_file, json_root, + JSON_C_TO_STRING_PRETTY); + if (ret < 0) { + nvme_msg(r, LOG_ERR, "Failed to write to %s, %s\n", + config_file ? "stdout" : config_file, + json_util_get_last_err()); + ret = -1; + errno = EIO; + } + json_object_put(json_root); + + return ret; +} + +static void json_dump_ctrl(struct json_object *ctrl_array, nvme_ctrl_t c) +{ + struct nvme_fabrics_config *cfg = nvme_ctrl_get_config(c); + struct json_object *ctrl_obj = json_object_new_object(); + const char *name, *transport, *value; + + name = nvme_ctrl_get_name(c); + if (name && strlen(name)) + json_object_object_add(ctrl_obj, "name", + json_object_new_string(name)); + transport = nvme_ctrl_get_transport(c); + json_object_object_add(ctrl_obj, "transport", + json_object_new_string(transport)); + value = nvme_ctrl_get_traddr(c); + if (value) + json_object_object_add(ctrl_obj, "traddr", + json_object_new_string(value)); + value = nvme_ctrl_get_host_traddr(c); + if (value) + json_object_object_add(ctrl_obj, "host_traddr", + json_object_new_string(value)); + value = nvme_ctrl_get_host_iface(c); + if (value) + json_object_object_add(ctrl_obj, "host_iface", + json_object_new_string(value)); + value = nvme_ctrl_get_trsvcid(c); + if (value) + json_object_object_add(ctrl_obj, "trsvcid", + json_object_new_string(value)); + value = nvme_ctrl_get_dhchap_host_key(c); + if (value) + json_object_object_add(ctrl_obj, "dhchap_key", + json_object_new_string(value)); + value = nvme_ctrl_get_dhchap_key(c); + if (value) + json_object_object_add(ctrl_obj, "dhchap_ctrl_key", + json_object_new_string(value)); + JSON_INT_OPTION(cfg, ctrl_obj, nr_io_queues, 0); + JSON_INT_OPTION(cfg, ctrl_obj, nr_write_queues, 0); + JSON_INT_OPTION(cfg, ctrl_obj, nr_poll_queues, 0); + JSON_INT_OPTION(cfg, ctrl_obj, queue_size, 0); + JSON_INT_OPTION(cfg, ctrl_obj, keep_alive_tmo, 0); + JSON_INT_OPTION(cfg, ctrl_obj, reconnect_delay, 0); + if (strcmp(transport, "loop")) { + JSON_INT_OPTION(cfg, ctrl_obj, ctrl_loss_tmo, + NVMF_DEF_CTRL_LOSS_TMO); + JSON_INT_OPTION(cfg, ctrl_obj, fast_io_fail_tmo, 0); + } + JSON_INT_OPTION(cfg, ctrl_obj, tos, -1); + JSON_BOOL_OPTION(cfg, ctrl_obj, duplicate_connect); + JSON_BOOL_OPTION(cfg, ctrl_obj, disable_sqflow); + JSON_BOOL_OPTION(cfg, ctrl_obj, hdr_digest); + JSON_BOOL_OPTION(cfg, ctrl_obj, data_digest); + JSON_BOOL_OPTION(cfg, ctrl_obj, tls); + if (nvme_ctrl_is_persistent(c)) + json_object_object_add(ctrl_obj, "persistent", + json_object_new_boolean(true)); + if (nvme_ctrl_is_discovery_ctrl(c)) + json_object_object_add(ctrl_obj, "discovery", + json_object_new_boolean(true)); + json_object_array_add(ctrl_array, ctrl_obj); +} + +static void json_dump_subsys(struct json_object *subsys_array, + nvme_subsystem_t s) +{ + nvme_ctrl_t c; + struct json_object *subsys_obj = json_object_new_object(); + struct json_object *ctrl_array; + + json_object_object_add(subsys_obj, "name", + json_object_new_string(nvme_subsystem_get_name(s))); + json_object_object_add(subsys_obj, "nqn", + json_object_new_string(nvme_subsystem_get_nqn(s))); + ctrl_array = json_object_new_array(); + nvme_subsystem_for_each_ctrl(s, c) { + json_dump_ctrl(ctrl_array, c); + } + if (json_object_array_length(ctrl_array)) + json_object_object_add(subsys_obj, "controllers", ctrl_array); + else + json_object_put(ctrl_array); + json_object_array_add(subsys_array, subsys_obj); +} + +int json_dump_tree(nvme_root_t r) +{ + nvme_host_t h; + struct json_object *json_root, *host_obj; + struct json_object *host_array, *subsys_array; + int ret = 0; + + json_root = json_object_new_object(); + host_array = json_object_new_array(); + nvme_for_each_host(r, h) { + nvme_subsystem_t s; + const char *hostid, *dhchap_key; + + host_obj = json_object_new_object(); + json_object_object_add(host_obj, "hostnqn", + json_object_new_string(nvme_host_get_hostnqn(h))); + hostid = nvme_host_get_hostid(h); + if (hostid) + json_object_object_add(host_obj, "hostid", + json_object_new_string(hostid)); + dhchap_key = nvme_host_get_dhchap_key(h); + if (dhchap_key) + json_object_object_add(host_obj, "dhchap_key", + json_object_new_string(dhchap_key)); + if (h->pdc_enabled_valid) + json_object_object_add(host_obj, "persistent_discovery_ctrl", + json_object_new_boolean(h->pdc_enabled)); + subsys_array = json_object_new_array(); + nvme_for_each_subsystem(h, s) { + json_dump_subsys(subsys_array, s); + } + if (json_object_array_length(subsys_array)) + json_object_object_add(host_obj, "subsystems", + subsys_array); + else + json_object_put(subsys_array); + json_object_array_add(host_array, host_obj); + } + json_object_object_add(json_root, "hosts", host_array); + + ret = json_object_to_fd(1, json_root, JSON_C_TO_STRING_PRETTY); + if (ret < 0) { + nvme_msg(r, LOG_ERR, "Failed to write to stdout, %s\n", + json_util_get_last_err()); + ret = -1; + errno = EIO; + } + json_object_put(json_root); + + return ret; +} |