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-rw-r--r--src/nvme/mi-mctp.c822
1 files changed, 822 insertions, 0 deletions
diff --git a/src/nvme/mi-mctp.c b/src/nvme/mi-mctp.c
new file mode 100644
index 0000000..0c5972a
--- /dev/null
+++ b/src/nvme/mi-mctp.c
@@ -0,0 +1,822 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/*
+ * This file is part of libnvme.
+ * Copyright (c) 2021 Code Construct Pty Ltd
+ *
+ * Authors: Jeremy Kerr <jk@codeconstruct.com.au>
+ */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <poll.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+
+#if HAVE_LINUX_MCTP_H
+#include <linux/mctp.h>
+#endif
+
+#include <ccan/endian/endian.h>
+
+#ifdef CONFIG_DBUS
+#include <dbus/dbus.h>
+
+#define MCTP_DBUS_PATH "/xyz/openbmc_project/mctp"
+#define MCTP_DBUS_IFACE "xyz.openbmc_project.MCTP"
+#define MCTP_DBUS_IFACE_ENDPOINT "xyz.openbmc_project.MCTP.Endpoint"
+#endif
+
+#include "private.h"
+#include "log.h"
+#include "mi.h"
+
+
+#if !defined(AF_MCTP)
+#define AF_MCTP 45
+#endif
+
+#if !HAVE_LINUX_MCTP_H
+/* As of kernel v5.15, these AF_MCTP-related definitions are provided by
+ * linux/mctp.h. However, we provide a set here while that header percolates
+ * through to standard includes.
+ *
+ * These were all introduced in the same version as AF_MCTP was defined,
+ * so we can key off the presence of that.
+ */
+
+typedef __u8 mctp_eid_t;
+
+struct mctp_addr {
+ mctp_eid_t s_addr;
+};
+
+struct sockaddr_mctp {
+ unsigned short int smctp_family;
+ __u16 __smctp_pad0;
+ unsigned int smctp_network;
+ struct mctp_addr smctp_addr;
+ __u8 smctp_type;
+ __u8 smctp_tag;
+ __u8 __smctp_pad1;
+};
+
+#define MCTP_NET_ANY 0x0
+
+#define MCTP_ADDR_NULL 0x00
+#define MCTP_ADDR_ANY 0xff
+
+#define MCTP_TAG_MASK 0x07
+#define MCTP_TAG_OWNER 0x08
+
+#endif /* !AF_MCTP */
+
+#define MCTP_TYPE_NVME 0x04
+#define MCTP_TYPE_MIC 0x80
+
+struct nvme_mi_transport_mctp {
+ int net;
+ __u8 eid;
+ int sd;
+};
+
+static int ioctl_tag(int sd, unsigned long req, struct mctp_ioc_tag_ctl *ctl)
+{
+ return ioctl(sd, req, ctl);
+}
+
+static struct __mi_mctp_socket_ops ops = {
+ socket,
+ sendmsg,
+ recvmsg,
+ poll,
+ ioctl_tag,
+};
+
+void __nvme_mi_mctp_set_ops(const struct __mi_mctp_socket_ops *newops)
+{
+ ops = *newops;
+}
+static const struct nvme_mi_transport nvme_mi_transport_mctp;
+
+#ifdef SIOCMCTPALLOCTAG
+static __u8 nvme_mi_mctp_tag_alloc(struct nvme_mi_ep *ep)
+{
+ struct nvme_mi_transport_mctp *mctp;
+ struct mctp_ioc_tag_ctl ctl = { 0 };
+ static bool logged;
+ int rc;
+
+ mctp = ep->transport_data;
+
+ ctl.peer_addr = mctp->eid;
+
+ errno = 0;
+ rc = ops.ioctl_tag(mctp->sd, SIOCMCTPALLOCTAG, &ctl);
+ if (rc) {
+ if (!logged) {
+ /* not necessarily fatal, just means we can't handle
+ * "more processing required" messages */
+ nvme_msg(ep->root, LOG_INFO,
+ "System does not support explicit tag allocation\n");
+ logged = true;
+ }
+ return MCTP_TAG_OWNER;
+ }
+
+ return ctl.tag;
+}
+
+static void nvme_mi_mctp_tag_drop(struct nvme_mi_ep *ep, __u8 tag)
+{
+ struct nvme_mi_transport_mctp *mctp;
+ struct mctp_ioc_tag_ctl ctl = { 0 };
+
+ mctp = ep->transport_data;
+
+ if (!(tag & MCTP_TAG_PREALLOC))
+ return;
+
+ ctl.peer_addr = mctp->eid;
+ ctl.tag = tag;
+
+ ops.ioctl_tag(mctp->sd, SIOCMCTPDROPTAG, &ctl);
+}
+
+#else /* !defined SIOMCTPTAGALLOC */
+
+static __u8 nvme_mi_mctp_tag_alloc(struct nvme_mi_ep *ep)
+{
+ static bool logged;
+ if (!logged) {
+ nvme_msg(ep->root, LOG_INFO,
+ "Build does not support explicit tag allocation\n");
+ logged = true;
+ }
+ return MCTP_TAG_OWNER;
+}
+
+static void nvme_mi_mctp_tag_drop(struct nvme_mi_ep *ep, __u8 tag)
+{
+}
+
+#endif /* !defined SIOMCTPTAGALLOC */
+
+struct nvme_mi_msg_resp_mpr {
+ struct nvme_mi_msg_hdr hdr;
+ __u8 status;
+ __u8 rsvd0;
+ __u16 mprt;
+};
+
+/* Check if this response was a More Processing Required response; if so,
+ * populate the worst-case expected processing time, given in milliseconds.
+ */
+static bool nvme_mi_mctp_resp_is_mpr(struct nvme_mi_resp *resp, size_t len,
+ __le32 mic, unsigned int *mpr_time)
+{
+ struct nvme_mi_admin_resp_hdr *admin_msg;
+ struct nvme_mi_msg_resp_mpr *msg;
+ size_t clen;
+ __u32 crc;
+
+ /* We need at least the minimal header plus checksum */
+ if (len < sizeof(*msg) + sizeof(mic))
+ return false;
+
+ msg = (struct nvme_mi_msg_resp_mpr *)resp->hdr;
+
+ if (msg->status != NVME_MI_RESP_MPR)
+ return false;
+
+ /* Find and verify the MIC from the response, which may not be laid out
+ * in resp as we expect. We have to preserve resp->hdr_len and
+ * resp->data_len, as we will need them for the eventual reply message.
+ * Because of that, we can't use verify_resp_mic here.
+ *
+ * If the packet was at the expected response size, then mic will
+ * be set already; if not, find it within the header/data buffers.
+ */
+
+ /* Devices may send a MPR response as a full-sized Admin response,
+ * rather than the minimal MI-only header. Allow this, but only if the
+ * type indicates admin, and the allocated response header is the
+ * correct size for an Admin response.
+ */
+ if (((msg->hdr.nmp >> 3) & 0xf) == NVME_MI_MT_ADMIN &&
+ len == sizeof(*admin_msg) + sizeof(mic) &&
+ resp->hdr_len == sizeof(*admin_msg)) {
+ if (resp->data_len)
+ mic = *(__le32 *)resp->data;
+ } else if (len == sizeof(*msg) + sizeof(mic)) {
+ if (resp->hdr_len > sizeof(*msg))
+ mic = *(__le32 *)(msg + 1);
+ else if (resp->data_len)
+ mic = *(__le32 *)(resp->data);
+ } else {
+ return false;
+ }
+
+ /* Since our response is just a header, we're guaranteed to have
+ * all data in resp->hdr. The response may be shorter than the expected
+ * header though, so clamp to len.
+ */
+ len -= sizeof(mic);
+ clen = len < resp->hdr_len ? len : resp->hdr_len;
+
+ crc = ~nvme_mi_crc32_update(0xffffffff, resp->hdr, clen);
+ if (le32_to_cpu(mic) != crc)
+ return false;
+
+ if (mpr_time)
+ *mpr_time = cpu_to_le16(msg->mprt) * 100;
+
+ return true;
+}
+
+static int nvme_mi_mctp_submit(struct nvme_mi_ep *ep,
+ struct nvme_mi_req *req,
+ struct nvme_mi_resp *resp)
+{
+ struct nvme_mi_transport_mctp *mctp;
+ struct iovec req_iov[3], resp_iov[3];
+ struct msghdr req_msg, resp_msg;
+ int i, rc, errno_save, timeout;
+ struct sockaddr_mctp addr;
+ struct pollfd pollfds[1];
+ unsigned int mpr_time;
+ ssize_t len;
+ __le32 mic;
+ __u8 tag;
+
+ if (ep->transport != &nvme_mi_transport_mctp) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* we need enough space for at least a generic (/error) response */
+ if (resp->hdr_len < sizeof(struct nvme_mi_msg_resp)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ mctp = ep->transport_data;
+ tag = nvme_mi_mctp_tag_alloc(ep);
+
+ memset(&addr, 0, sizeof(addr));
+ addr.smctp_family = AF_MCTP;
+ addr.smctp_network = mctp->net;
+ addr.smctp_addr.s_addr = mctp->eid;
+ addr.smctp_type = MCTP_TYPE_NVME | MCTP_TYPE_MIC;
+ addr.smctp_tag = tag;
+
+ i = 0;
+ req_iov[i].iov_base = ((__u8 *)req->hdr) + 1;
+ req_iov[i].iov_len = req->hdr_len - 1;
+ i++;
+
+ if (req->data_len) {
+ req_iov[i].iov_base = req->data;
+ req_iov[i].iov_len = req->data_len;
+ i++;
+ }
+
+ mic = cpu_to_le32(req->mic);
+ req_iov[i].iov_base = &mic;
+ req_iov[i].iov_len = sizeof(mic);
+ i++;
+
+ memset(&req_msg, 0, sizeof(req_msg));
+ req_msg.msg_name = &addr;
+ req_msg.msg_namelen = sizeof(addr);
+ req_msg.msg_iov = req_iov;
+ req_msg.msg_iovlen = i;
+
+ len = ops.sendmsg(mctp->sd, &req_msg, 0);
+ if (len < 0) {
+ errno_save = errno;
+ nvme_msg(ep->root, LOG_ERR,
+ "Failure sending MCTP message: %m\n");
+ errno = errno_save;
+ rc = -1;
+ goto out;
+ }
+
+ resp_iov[0].iov_base = ((__u8 *)resp->hdr) + 1;
+ resp_iov[0].iov_len = resp->hdr_len - 1;
+
+ resp_iov[1].iov_base = ((__u8 *)resp->data);
+ resp_iov[1].iov_len = resp->data_len;
+
+ resp_iov[2].iov_base = &mic;
+ resp_iov[2].iov_len = sizeof(mic);
+
+ memset(&resp_msg, 0, sizeof(resp_msg));
+ resp_msg.msg_name = &addr;
+ resp_msg.msg_namelen = sizeof(addr);
+ resp_msg.msg_iov = resp_iov;
+ resp_msg.msg_iovlen = 3;
+
+ pollfds[0].fd = mctp->sd;
+ pollfds[0].events = POLLIN;
+ timeout = ep->timeout ?: -1;
+retry:
+ rc = ops.poll(pollfds, 1, timeout);
+ if (rc < 0) {
+ if (errno == EINTR)
+ goto retry;
+ errno_save = errno;
+ nvme_msg(ep->root, LOG_ERR,
+ "Failed polling on MCTP socket: %m");
+ errno = errno_save;
+ return -1;
+ }
+
+ if (rc == 0) {
+ nvme_msg(ep->root, LOG_DEBUG, "Timeout on MCTP socket");
+ errno = ETIMEDOUT;
+ return -1;
+ }
+
+ rc = -1;
+ len = ops.recvmsg(mctp->sd, &resp_msg, MSG_DONTWAIT);
+
+ if (len < 0) {
+ errno_save = errno;
+ nvme_msg(ep->root, LOG_ERR,
+ "Failure receiving MCTP message: %m\n");
+ errno = errno_save;
+ goto out;
+ }
+
+
+ if (len == 0) {
+ nvme_msg(ep->root, LOG_WARNING, "No data from MCTP endpoint\n");
+ errno = EIO;
+ goto out;
+ }
+
+ /* Re-add the type byte, so we can work on aligned lengths from here */
+ resp->hdr->type = MCTP_TYPE_NVME | MCTP_TYPE_MIC;
+ len += 1;
+
+ /* The smallest response data is 8 bytes: generic 4-byte message header
+ * plus four bytes of error data (excluding MIC). Ensure we have enough.
+ */
+ if (len < 8 + sizeof(mic)) {
+ nvme_msg(ep->root, LOG_ERR,
+ "Invalid MCTP response: too short (%zd bytes, needed %zd)\n",
+ len, 8 + sizeof(mic));
+ errno = EPROTO;
+ goto out;
+ }
+
+ /* We can't have header/payload data that isn't a multiple of 4 bytes */
+ if (len & 0x3) {
+ nvme_msg(ep->root, LOG_WARNING,
+ "Response message has unaligned length (%zd)!\n",
+ len);
+ errno = EPROTO;
+ goto out;
+ }
+
+ /* Check for a More Processing Required response. This is a slight
+ * layering violation, as we're pre-checking the MIC and inspecting
+ * header fields. However, we need to do this in the transport in order
+ * to keep the tag allocated and retry the recvmsg
+ */
+ if (nvme_mi_mctp_resp_is_mpr(resp, len, mic, &mpr_time)) {
+ nvme_msg(ep->root, LOG_DEBUG,
+ "Received More Processing Required, waiting for response\n");
+
+ /* if the controller hasn't set MPRT, fall back to our command/
+ * response timeout, or the largest possible MPRT if none set */
+ if (!mpr_time)
+ mpr_time = ep->timeout ?: 0xffff;
+
+ /* clamp to the endpoint max */
+ if (ep->mprt_max && mpr_time > ep->mprt_max)
+ mpr_time = ep->mprt_max;
+
+ timeout = mpr_time;
+ goto retry;
+ }
+
+ /* If we have a shorter than expected response, we need to find the
+ * MIC and the correct split between header & data. We know that the
+ * split is 4-byte aligned, so the MIC will be entirely within one
+ * of the iovecs.
+ */
+ if (len == resp->hdr_len + resp->data_len + sizeof(mic)) {
+ /* Common case: expected data length. Header, data and MIC
+ * are already laid-out correctly. Nothing to do. */
+
+ } else if (len < resp->hdr_len + sizeof(mic)) {
+ /* Response is smaller than the expected header. MIC is
+ * somewhere in the header buf */
+ resp->hdr_len = len - sizeof(mic);
+ resp->data_len = 0;
+ memcpy(&mic, ((uint8_t *)resp->hdr) + resp->hdr_len,
+ sizeof(mic));
+
+ } else {
+ /* We have a full header, but data is truncated - possibly
+ * zero bytes. MIC is somewhere in the data buf */
+ resp->data_len = len - resp->hdr_len - sizeof(mic);
+ memcpy(&mic, ((uint8_t *)resp->data) + resp->data_len,
+ sizeof(mic));
+ }
+
+ resp->mic = le32_to_cpu(mic);
+
+ rc = 0;
+
+out:
+ nvme_mi_mctp_tag_drop(ep, tag);
+
+ return rc;
+}
+
+static void nvme_mi_mctp_close(struct nvme_mi_ep *ep)
+{
+ struct nvme_mi_transport_mctp *mctp;
+
+ if (ep->transport != &nvme_mi_transport_mctp)
+ return;
+
+ mctp = ep->transport_data;
+ close(mctp->sd);
+ free(ep->transport_data);
+}
+
+static int nvme_mi_mctp_desc_ep(struct nvme_mi_ep *ep, char *buf, size_t len)
+{
+ struct nvme_mi_transport_mctp *mctp;
+
+ if (ep->transport != &nvme_mi_transport_mctp) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ mctp = ep->transport_data;
+
+ snprintf(buf, len, "net %d eid %d", mctp->net, mctp->eid);
+
+ return 0;
+}
+
+static const struct nvme_mi_transport nvme_mi_transport_mctp = {
+ .name = "mctp",
+ .mic_enabled = true,
+ .submit = nvme_mi_mctp_submit,
+ .close = nvme_mi_mctp_close,
+ .desc_ep = nvme_mi_mctp_desc_ep,
+};
+
+nvme_mi_ep_t nvme_mi_open_mctp(nvme_root_t root, unsigned int netid, __u8 eid)
+{
+ struct nvme_mi_transport_mctp *mctp;
+ struct nvme_mi_ep *ep;
+ int errno_save;
+
+ ep = nvme_mi_init_ep(root);
+ if (!ep)
+ return NULL;
+
+ mctp = malloc(sizeof(*mctp));
+ if (!mctp)
+ goto err_free_ep;
+
+ mctp->net = netid;
+ mctp->eid = eid;
+
+ mctp->sd = ops.socket(AF_MCTP, SOCK_DGRAM, 0);
+ if (mctp->sd < 0)
+ goto err_free_ep;
+
+ ep->transport = &nvme_mi_transport_mctp;
+ ep->transport_data = mctp;
+
+ /* Assuming an i2c transport at 100kHz, smallest MTU (64+4). Given
+ * a worst-case clock stretch, and largest-sized packets, we can
+ * expect up to 1.6s per command/response pair. Allowing for a
+ * retry or two (handled by lower layers), 5s is a reasonable timeout.
+ */
+ ep->timeout = 5000;
+
+ nvme_mi_ep_probe(ep);
+
+ return ep;
+
+err_free_ep:
+ errno_save = errno;
+ nvme_mi_close(ep);
+ free(mctp);
+ errno = errno_save;
+ return NULL;
+}
+
+#ifdef CONFIG_DBUS
+
+static int nvme_mi_mctp_add(nvme_root_t root, unsigned int netid, __u8 eid)
+{
+ nvme_mi_ep_t ep = NULL;
+
+ /* ensure we don't already have an endpoint with the same net/eid. if
+ * we do, just skip, no need to re-add. */
+ list_for_each(&root->endpoints, ep, root_entry) {
+ if (ep->transport != &nvme_mi_transport_mctp) {
+ continue;
+ }
+ const struct nvme_mi_transport_mctp *t = ep->transport_data;
+ if (t->eid == eid && t->net == netid)
+ return 0;
+ }
+
+ ep = nvme_mi_open_mctp(root, netid, eid);
+ if (!ep)
+ return -1;
+
+ return 0;
+}
+
+static bool dbus_object_is_type(DBusMessageIter *obj, int type)
+{
+ return dbus_message_iter_get_arg_type(obj) == type;
+}
+
+static bool dbus_object_is_dict(DBusMessageIter *obj)
+{
+ return dbus_object_is_type(obj, DBUS_TYPE_ARRAY) &&
+ dbus_message_iter_get_element_type(obj) == DBUS_TYPE_DICT_ENTRY;
+}
+
+static int read_variant_basic(DBusMessageIter *var, int type, void *val)
+{
+ if (!dbus_object_is_type(var, type))
+ return -1;
+
+ dbus_message_iter_get_basic(var, val);
+
+ return 0;
+}
+
+static bool has_message_type(DBusMessageIter *prop, uint8_t type)
+{
+ DBusMessageIter inner;
+ uint8_t *types;
+ int i, n;
+
+ if (!dbus_object_is_type(prop, DBUS_TYPE_ARRAY) ||
+ dbus_message_iter_get_element_type(prop) != DBUS_TYPE_BYTE)
+ return false;
+
+ dbus_message_iter_recurse(prop, &inner);
+
+ dbus_message_iter_get_fixed_array(&inner, &types, &n);
+
+ for (i = 0; i < n; i++) {
+ if (types[i] == type)
+ return true;
+ }
+
+ return false;
+}
+
+static int handle_mctp_endpoint(nvme_root_t root, const char* objpath,
+ DBusMessageIter *props)
+{
+ bool have_eid = false, have_net = false, have_nvmemi = false;
+ mctp_eid_t eid;
+ int net;
+ int rc;
+
+ /* for each property */
+ for (;;) {
+ DBusMessageIter prop, val;
+ const char *propname;
+
+ dbus_message_iter_recurse(props, &prop);
+
+ if (!dbus_object_is_type(&prop, DBUS_TYPE_STRING)) {
+ nvme_msg(root, LOG_ERR,
+ "error unmashalling object (propname)\n");
+ return -1;
+ }
+
+ dbus_message_iter_get_basic(&prop, &propname);
+
+ dbus_message_iter_next(&prop);
+
+ if (!dbus_object_is_type(&prop, DBUS_TYPE_VARIANT)) {
+ nvme_msg(root, LOG_ERR,
+ "error unmashalling object (propval)\n");
+ return -1;
+ }
+
+ dbus_message_iter_recurse(&prop, &val);
+
+ if (!strcmp(propname, "EID")) {
+ rc = read_variant_basic(&val, DBUS_TYPE_BYTE, &eid);
+ have_eid = true;
+
+ } else if (!strcmp(propname, "NetworkId")) {
+ rc = read_variant_basic(&val, DBUS_TYPE_INT32, &net);
+ have_net = true;
+
+ } else if (!strcmp(propname, "SupportedMessageTypes")) {
+ have_nvmemi = has_message_type(&val, MCTP_TYPE_NVME);
+ }
+
+ if (rc)
+ return rc;
+
+ if (!dbus_message_iter_next(props))
+ break;
+ }
+
+ if (have_nvmemi) {
+ if (!(have_eid && have_net)) {
+ nvme_msg(root, LOG_ERR,
+ "Missing property for %s\n", objpath);
+ errno = ENOENT;
+ return -1;
+ }
+ rc = nvme_mi_mctp_add(root, net, eid);
+ if (rc < 0) {
+ int errno_save = errno;
+ nvme_msg(root, LOG_ERR,
+ "Error adding net %d eid %d: %m\n", net, eid);
+ errno = errno_save;
+ }
+ } else {
+ /* Ignore other endpoints */
+ rc = 0;
+ }
+ return rc;
+}
+
+/* obj is an array of (object path, interfaces) dict entries - ie., dbus type
+ * a{oa{sa{sv}}}
+ */
+static int handle_mctp_obj(nvme_root_t root, DBusMessageIter *obj)
+{
+ const char *objpath = NULL;
+ DBusMessageIter intfs;
+
+ if (!dbus_object_is_type(obj, DBUS_TYPE_OBJECT_PATH)) {
+ nvme_msg(root, LOG_ERR, "error unmashalling object (path)\n");
+ return -1;
+ }
+
+ dbus_message_iter_get_basic(obj, &objpath);
+
+ dbus_message_iter_next(obj);
+
+ if (!dbus_object_is_dict(obj)) {
+ nvme_msg(root, LOG_ERR, "error unmashalling object (intfs)\n");
+ return -1;
+ }
+
+ dbus_message_iter_recurse(obj, &intfs);
+
+ /* for each interface */
+ for (;;) {
+ DBusMessageIter props, intf;
+ const char *intfname;
+
+ dbus_message_iter_recurse(&intfs, &intf);
+
+ if (!dbus_object_is_type(&intf, DBUS_TYPE_STRING)) {
+ nvme_msg(root, LOG_ERR,
+ "error unmashalling object (intf)\n");
+ return -1;
+ }
+
+ dbus_message_iter_get_basic(&intf, &intfname);
+
+ if (strcmp(intfname, MCTP_DBUS_IFACE_ENDPOINT)) {
+ if (!dbus_message_iter_next(&intfs))
+ break;
+ continue;
+ }
+
+ dbus_message_iter_next(&intf);
+
+ if (!dbus_object_is_dict(&intf)) {
+ nvme_msg(root, LOG_ERR,
+ "error unmarshalling object (props)\n");
+ return -1;
+ }
+
+ dbus_message_iter_recurse(&intf, &props);
+ return handle_mctp_endpoint(root, objpath, &props);
+ }
+
+ return 0;
+}
+
+nvme_root_t nvme_mi_scan_mctp(void)
+{
+ DBusMessage *msg, *resp = NULL;
+ DBusConnection *bus = NULL;
+ DBusMessageIter args, objs;
+ int errno_save, rc = -1;
+ nvme_root_t root;
+ dbus_bool_t drc;
+ DBusError berr;
+
+ root = nvme_mi_create_root(NULL, DEFAULT_LOGLEVEL);
+ if (!root) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ dbus_error_init(&berr);
+
+ bus = dbus_bus_get(DBUS_BUS_SYSTEM, &berr);
+ if (!bus) {
+ nvme_msg(root, LOG_ERR, "Failed connecting to D-Bus: %s (%s)\n",
+ berr.message, berr.name);
+ goto out;
+ }
+
+ msg = dbus_message_new_method_call(MCTP_DBUS_IFACE,
+ MCTP_DBUS_PATH,
+ "org.freedesktop.DBus.ObjectManager",
+ "GetManagedObjects");
+ if (!msg) {
+ nvme_msg(root, LOG_ERR, "Failed creating call message\n");
+ goto out;
+ }
+
+ resp = dbus_connection_send_with_reply_and_block(bus, msg,
+ DBUS_TIMEOUT_USE_DEFAULT,
+ &berr);
+ dbus_message_unref(msg);
+ if (!resp) {
+ nvme_msg(root, LOG_ERR, "Failed querying MCTP D-Bus: %s (%s)\n",
+ berr.message, berr.name);
+ goto out;
+ }
+
+ /* argument container */
+ drc = dbus_message_iter_init(resp, &args);
+ if (!drc) {
+ nvme_msg(root, LOG_ERR, "can't read dbus reply args\n");
+ goto out;
+ }
+
+ if (!dbus_object_is_dict(&args)) {
+ nvme_msg(root, LOG_ERR, "error unmashalling args\n");
+ goto out;
+ }
+
+ /* objects container */
+ dbus_message_iter_recurse(&args, &objs);
+
+ rc = 0;
+
+ for (;;) {
+ DBusMessageIter ent;
+
+ dbus_message_iter_recurse(&objs, &ent);
+
+ rc = handle_mctp_obj(root, &ent);
+ if (rc)
+ break;
+
+ if (!dbus_message_iter_next(&objs))
+ break;
+ }
+
+out:
+ errno_save = errno;
+ if (resp)
+ dbus_message_unref(resp);
+ if (bus)
+ dbus_connection_unref(bus);
+ dbus_error_free(&berr);
+
+ if (rc < 0) {
+ if (root) {
+ nvme_mi_free_root(root);
+ }
+ errno = errno_save;
+ root = NULL;
+ }
+ return root;
+}
+
+#else /* CONFIG_DBUS */
+
+nvme_root_t nvme_mi_scan_mctp(void)
+{
+ return NULL;
+}
+
+#endif /* CONFIG_DBUS */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 17:46:56 +0000