--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2012,2016,2017,2025 Stefan Metzmacher
+ */
+
+#include "smbdirect_internal.h"
+#include "../../common/smb2status.h"
+
+static int smbdirect_connect_setup_connection(struct smbdirect_socket *sc);
+static int smbdirect_connect_resolve_addr(struct smbdirect_socket *sc,
+ const struct sockaddr *src,
+ const struct sockaddr *dst);
+static int smbdirect_connect_rdma_event_handler(struct rdma_cm_id *id,
+ struct rdma_cm_event *event);
+static int smbdirect_connect_negotiate_start(struct smbdirect_socket *sc);
+static void smbdirect_connect_negotiate_send_done(struct ib_cq *cq, struct ib_wc *wc);
+static void smbdirect_connect_negotiate_recv_done(struct ib_cq *cq, struct ib_wc *wc);
+
+__maybe_unused /* this is temporary while this file is included in others */
+static int smbdirect_connect(struct smbdirect_socket *sc,
+ const struct sockaddr *dst)
+{
+ const struct sockaddr *src = NULL;
+ union {
+ struct sockaddr sa;
+ struct sockaddr_storage ss;
+ } src_addr = {
+ .sa = {
+ .sa_family = AF_UNSPEC,
+ },
+ };
+ int ret;
+
+ if (sc->first_error)
+ return -ENOTCONN;
+
+ if (sc->status != SMBDIRECT_SOCKET_CREATED)
+ return -EALREADY;
+
+ if (WARN_ON_ONCE(!sc->rdma.cm_id))
+ return -EINVAL;
+
+ src_addr.ss = sc->rdma.cm_id->route.addr.src_addr;
+ if (src_addr.sa.sa_family != AF_UNSPEC)
+ src = &src_addr.sa;
+
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_INFO,
+ "connect: src: %pISpsfc dst: %pISpsfc\n",
+ src, dst);
+
+ ret = smbdirect_connect_setup_connection(sc);
+ if (ret)
+ return ret;
+
+ ret = smbdirect_connect_resolve_addr(sc, src, dst);
+ if (ret)
+ return ret;
+
+ /*
+ * The rest happens async via smbdirect_connect_rdma_event_handler()
+ * the caller will decide to wait or not.
+ */
+ return 0;
+}
+
+static int smbdirect_connect_setup_connection(struct smbdirect_socket *sc)
+{
+ rdma_lock_handler(sc->rdma.cm_id);
+ sc->rdma.cm_id->event_handler = smbdirect_connect_rdma_event_handler;
+ rdma_unlock_handler(sc->rdma.cm_id);
+
+ if (SMBDIRECT_CHECK_STATUS_WARN(sc, SMBDIRECT_SOCKET_CREATED))
+ return -EINVAL;
+ sc->status = SMBDIRECT_SOCKET_RESOLVE_ADDR_NEEDED;
+
+ return 0;
+}
+
+static int smbdirect_connect_resolve_addr(struct smbdirect_socket *sc,
+ const struct sockaddr *src,
+ const struct sockaddr *dst)
+{
+ const struct smbdirect_socket_parameters *sp = &sc->parameters;
+ struct sockaddr *src_addr = NULL;
+ struct sockaddr *dst_addr = NULL;
+ int ret;
+
+ src_addr = (struct sockaddr *)src;
+ if (src_addr && src_addr->sa_family == AF_UNSPEC)
+ src_addr = NULL;
+ dst_addr = (struct sockaddr *)dst;
+
+ if (SMBDIRECT_CHECK_STATUS_WARN(sc, SMBDIRECT_SOCKET_RESOLVE_ADDR_NEEDED))
+ return -EINVAL;
+ sc->status = SMBDIRECT_SOCKET_RESOLVE_ADDR_RUNNING;
+ sc->rdma.expected_event = RDMA_CM_EVENT_ADDR_RESOLVED;
+ ret = rdma_resolve_addr(sc->rdma.cm_id, src_addr, dst_addr,
+ sp->resolve_addr_timeout_msec);
+ if (ret) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "rdma_resolve_addr() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ return ret;
+ }
+
+ return 0;
+}
+
+static int smbdirect_connect_resolve_route(struct smbdirect_socket *sc)
+{
+ const struct smbdirect_socket_parameters *sp = &sc->parameters;
+ int ret;
+
+ if (SMBDIRECT_CHECK_STATUS_DISCONNECT(sc, SMBDIRECT_SOCKET_RESOLVE_ROUTE_NEEDED))
+ return sc->first_error;
+ sc->status = SMBDIRECT_SOCKET_RESOLVE_ROUTE_RUNNING;
+ sc->rdma.expected_event = RDMA_CM_EVENT_ROUTE_RESOLVED;
+ ret = rdma_resolve_route(sc->rdma.cm_id, sp->resolve_route_timeout_msec);
+ if (ret) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "rdma_resolve_route() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ return ret;
+ }
+
+ return 0;
+}
+
+static int smbdirect_connect_rdma_connect(struct smbdirect_socket *sc)
+{
+ struct smbdirect_socket_parameters *sp = &sc->parameters;
+ struct rdma_conn_param conn_param;
+ __be32 ird_ord_hdr[2];
+ int ret;
+
+ sc->ib.dev = sc->rdma.cm_id->device;
+
+ if (!smbdirect_frwr_is_supported(&sc->ib.dev->attrs)) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "Fast Registration Work Requests (FRWR) is not supported device %.*s\n",
+ IB_DEVICE_NAME_MAX,
+ sc->ib.dev->name);
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "Device capability flags = %llx max_fast_reg_page_list_len = %u\n",
+ sc->ib.dev->attrs.device_cap_flags,
+ sc->ib.dev->attrs.max_fast_reg_page_list_len);
+ return -EPROTONOSUPPORT;
+ }
+
+ if (sp->flags & SMBDIRECT_FLAG_PORT_RANGE_ONLY_IB &&
+ !rdma_ib_or_roce(sc->ib.dev, sc->rdma.cm_id->port_num)) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "Not IB: device: %.*s IW:%u local: %pISpsfc remote: %pISpsfc\n",
+ IB_DEVICE_NAME_MAX,
+ sc->ib.dev->name,
+ rdma_protocol_iwarp(sc->ib.dev, sc->rdma.cm_id->port_num),
+ &sc->rdma.cm_id->route.addr.src_addr,
+ &sc->rdma.cm_id->route.addr.dst_addr);
+ return -EPROTONOSUPPORT;
+ }
+ if (sp->flags & SMBDIRECT_FLAG_PORT_RANGE_ONLY_IW &&
+ !rdma_protocol_iwarp(sc->ib.dev, sc->rdma.cm_id->port_num)) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "Not IW: device: %.*s IB:%u local: %pISpsfc remote: %pISpsfc\n",
+ IB_DEVICE_NAME_MAX,
+ sc->ib.dev->name,
+ rdma_ib_or_roce(sc->ib.dev, sc->rdma.cm_id->port_num),
+ &sc->rdma.cm_id->route.addr.src_addr,
+ &sc->rdma.cm_id->route.addr.dst_addr);
+ return -EPROTONOSUPPORT;
+ }
+
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_INFO,
+ "rdma connect: device: %.*s local: %pISpsfc remote: %pISpsfc\n",
+ IB_DEVICE_NAME_MAX,
+ sc->ib.dev->name,
+ &sc->rdma.cm_id->route.addr.src_addr,
+ &sc->rdma.cm_id->route.addr.dst_addr);
+
+ sp->max_frmr_depth = min_t(u32, sp->max_frmr_depth,
+ sc->ib.dev->attrs.max_fast_reg_page_list_len);
+ sc->mr_io.type = IB_MR_TYPE_MEM_REG;
+ if (sc->ib.dev->attrs.kernel_cap_flags & IBK_SG_GAPS_REG)
+ sc->mr_io.type = IB_MR_TYPE_SG_GAPS;
+
+ sp->responder_resources = min_t(u8, sp->responder_resources,
+ sc->ib.dev->attrs.max_qp_rd_atom);
+ smbdirect_log_rdma_mr(sc, SMBDIRECT_LOG_INFO,
+ "responder_resources=%d\n",
+ sp->responder_resources);
+
+ ret = smbdirect_connection_create_qp(sc);
+ if (ret) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "smbdirect_connection_create_qp() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ return ret;
+ }
+
+ memset(&conn_param, 0, sizeof(conn_param));
+ conn_param.initiator_depth = sp->initiator_depth;
+ conn_param.responder_resources = sp->responder_resources;
+
+ /* Need to send IRD/ORD in private data for iWARP */
+ if (rdma_protocol_iwarp(sc->ib.dev, sc->rdma.cm_id->port_num)) {
+ ird_ord_hdr[0] = cpu_to_be32(conn_param.responder_resources);
+ ird_ord_hdr[1] = cpu_to_be32(conn_param.initiator_depth);
+ conn_param.private_data = ird_ord_hdr;
+ conn_param.private_data_len = sizeof(ird_ord_hdr);
+ } else {
+ conn_param.private_data = NULL;
+ conn_param.private_data_len = 0;
+ }
+
+ conn_param.retry_count = SMBDIRECT_RDMA_CM_RETRY;
+ conn_param.rnr_retry_count = SMBDIRECT_RDMA_CM_RNR_RETRY;
+ conn_param.flow_control = 0;
+
+ if (SMBDIRECT_CHECK_STATUS_DISCONNECT(sc, SMBDIRECT_SOCKET_RDMA_CONNECT_NEEDED))
+ return sc->first_error;
+ sc->status = SMBDIRECT_SOCKET_RDMA_CONNECT_RUNNING;
+ sc->rdma.expected_event = RDMA_CM_EVENT_ESTABLISHED;
+ ret = rdma_connect_locked(sc->rdma.cm_id, &conn_param);
+ if (ret) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "rdma_connect_locked() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ return ret;
+ }
+
+ /*
+ * start with the rdma connect timeout and SMBDIRECT_KEEPALIVE_PENDING
+ * so that the timer will cause a disconnect.
+ */
+ INIT_DELAYED_WORK(&sc->idle.timer_work, smbdirect_connection_idle_timer_work);
+ sc->idle.keepalive = SMBDIRECT_KEEPALIVE_PENDING;
+ mod_delayed_work(sc->workqueue, &sc->idle.timer_work,
+ msecs_to_jiffies(sp->rdma_connect_timeout_msec));
+
+ return 0;
+}
+
+static int smbdirect_connect_rdma_event_handler(struct rdma_cm_id *id,
+ struct rdma_cm_event *event)
+{
+ struct smbdirect_socket *sc = id->context;
+ u8 peer_initiator_depth;
+ u8 peer_responder_resources;
+ int ret;
+
+ /*
+ * cma_cm_event_handler() has
+ * lockdep_assert_held(&id_priv->handler_mutex);
+ *
+ * Mutexes are not allowed in interrupts,
+ * and we rely on not being in an interrupt here,
+ * as we might sleep.
+ *
+ * We didn't timeout so we cancel our idle timer,
+ * it will be scheduled again if needed.
+ */
+ WARN_ON_ONCE(in_interrupt());
+ sc->idle.keepalive = SMBDIRECT_KEEPALIVE_NONE;
+ cancel_delayed_work_sync(&sc->idle.timer_work);
+
+ if (event->status || event->event != sc->rdma.expected_event) {
+ int lvl = SMBDIRECT_LOG_ERR;
+
+ ret = -ECONNABORTED;
+
+ if (event->event == RDMA_CM_EVENT_REJECTED)
+ ret = -ECONNREFUSED;
+ if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL)
+ ret = -ENETDOWN;
+ if (IS_ERR(SMBDIRECT_DEBUG_ERR_PTR(event->status)))
+ ret = event->status;
+
+ if (ret == -ENODEV)
+ lvl = SMBDIRECT_LOG_INFO;
+
+ smbdirect_log_rdma_event(sc, lvl,
+ "%s (first_error=%1pe, expected=%s) => event=%s status=%d => ret=%1pe\n",
+ smbdirect_socket_status_string(sc->status),
+ SMBDIRECT_DEBUG_ERR_PTR(sc->first_error),
+ rdma_event_msg(sc->rdma.expected_event),
+ rdma_event_msg(event->event),
+ event->status,
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+
+ smbdirect_socket_schedule_cleanup_lvl(sc,
+ lvl,
+ ret);
+ return 0;
+ }
+
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_INFO,
+ "%s (first_error=%1pe) event=%s\n",
+ smbdirect_socket_status_string(sc->status),
+ SMBDIRECT_DEBUG_ERR_PTR(sc->first_error),
+ rdma_event_msg(event->event));
+
+ if (sc->first_error)
+ return 0;
+
+ switch (event->event) {
+ case RDMA_CM_EVENT_ADDR_RESOLVED:
+ if (SMBDIRECT_CHECK_STATUS_DISCONNECT(sc, SMBDIRECT_SOCKET_RESOLVE_ADDR_RUNNING))
+ return 0;
+ sc->status = SMBDIRECT_SOCKET_RESOLVE_ROUTE_NEEDED;
+
+ ret = smbdirect_connect_resolve_route(sc);
+ if (ret)
+ smbdirect_socket_schedule_cleanup(sc, ret);
+ return 0;
+
+ case RDMA_CM_EVENT_ROUTE_RESOLVED:
+ if (SMBDIRECT_CHECK_STATUS_DISCONNECT(sc, SMBDIRECT_SOCKET_RESOLVE_ROUTE_RUNNING))
+ return 0;
+ sc->status = SMBDIRECT_SOCKET_RDMA_CONNECT_NEEDED;
+
+ ret = smbdirect_connect_rdma_connect(sc);
+ if (ret)
+ smbdirect_socket_schedule_cleanup(sc, ret);
+ return 0;
+
+ case RDMA_CM_EVENT_ESTABLISHED:
+ smbdirect_connection_rdma_established(sc);
+
+ if (SMBDIRECT_CHECK_STATUS_DISCONNECT(sc, SMBDIRECT_SOCKET_RDMA_CONNECT_RUNNING))
+ return 0;
+ sc->status = SMBDIRECT_SOCKET_NEGOTIATE_NEEDED;
+
+ /*
+ * Here we work around an inconsistency between
+ * iWarp and other devices (at least rxe and irdma using RoCEv2)
+ */
+ if (rdma_protocol_iwarp(id->device, id->port_num)) {
+ /*
+ * iWarp devices report the peer's values
+ * with the perspective of the peer here.
+ * Tested with siw and irdma (in iwarp mode)
+ * We need to change to our perspective here,
+ * so we need to switch the values.
+ */
+ peer_initiator_depth = event->param.conn.responder_resources;
+ peer_responder_resources = event->param.conn.initiator_depth;
+ } else {
+ /*
+ * Non iWarp devices report the peer's values
+ * already changed to our perspective here.
+ * Tested with rxe and irdma (in roce mode).
+ */
+ peer_initiator_depth = event->param.conn.initiator_depth;
+ peer_responder_resources = event->param.conn.responder_resources;
+ }
+ smbdirect_connection_negotiate_rdma_resources(sc,
+ peer_initiator_depth,
+ peer_responder_resources,
+ &event->param.conn);
+
+ ret = smbdirect_connect_negotiate_start(sc);
+ if (ret)
+ smbdirect_socket_schedule_cleanup(sc, ret);
+ return 0;
+
+ default:
+ break;
+ }
+
+ /*
+ * This is an internal error
+ */
+ WARN_ON_ONCE(sc->rdma.expected_event != RDMA_CM_EVENT_ESTABLISHED);
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+ return 0;
+}
+
+static int smbdirect_connect_negotiate_start(struct smbdirect_socket *sc)
+{
+ const struct smbdirect_socket_parameters *sp = &sc->parameters;
+ struct smbdirect_recv_io *recv_io = NULL;
+ struct smbdirect_send_io *send_io = NULL;
+ struct smbdirect_negotiate_req *nreq = NULL;
+ int ret;
+
+ if (SMBDIRECT_CHECK_STATUS_DISCONNECT(sc, SMBDIRECT_SOCKET_NEGOTIATE_NEEDED))
+ return sc->first_error;
+ sc->status = SMBDIRECT_SOCKET_NEGOTIATE_RUNNING;
+
+ ret = smbdirect_connection_create_mem_pools(sc);
+ if (ret) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "smbdirect_connection_create_mem_pools() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ goto create_mem_pools_failed;
+ }
+
+ /*
+ * There is only a single batch credit
+ */
+ atomic_set(&sc->send_io.bcredits.count, 1);
+
+ /*
+ * Initialize the local credits to post
+ * IB_WR_SEND[_WITH_INV].
+ */
+ atomic_set(&sc->send_io.lcredits.count, sp->send_credit_target);
+
+ recv_io = smbdirect_connection_get_recv_io(sc);
+ if (WARN_ON_ONCE(!recv_io)) {
+ ret = -EINVAL;
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "smbdirect_connection_get_recv_io() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ goto get_recv_io_failed;
+ }
+ recv_io->cqe.done = smbdirect_connect_negotiate_recv_done;
+
+ send_io = smbdirect_connection_alloc_send_io(sc);
+ if (IS_ERR(send_io)) {
+ ret = PTR_ERR(send_io);
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "smbdirect_connection_alloc_send_io() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ goto alloc_send_io_failed;
+ }
+ send_io->cqe.done = smbdirect_connect_negotiate_send_done;
+
+ nreq = (struct smbdirect_negotiate_req *)send_io->packet;
+ nreq->min_version = cpu_to_le16(SMBDIRECT_V1);
+ nreq->max_version = cpu_to_le16(SMBDIRECT_V1);
+ nreq->reserved = 0;
+ nreq->credits_requested = cpu_to_le16(sp->send_credit_target);
+ nreq->preferred_send_size = cpu_to_le32(sp->max_send_size);
+ nreq->max_receive_size = cpu_to_le32(sp->max_recv_size);
+ nreq->max_fragmented_size = cpu_to_le32(sp->max_fragmented_recv_size);
+
+ smbdirect_log_negotiate(sc, SMBDIRECT_LOG_INFO,
+ "ReqOut: %s%x, %s%x, %s%u, %s%u, %s%u, %s%u\n",
+ "MinVersion=0x",
+ le16_to_cpu(nreq->min_version),
+ "MaxVersion=0x",
+ le16_to_cpu(nreq->max_version),
+ "CreditsRequested=",
+ le16_to_cpu(nreq->credits_requested),
+ "PreferredSendSize=",
+ le32_to_cpu(nreq->preferred_send_size),
+ "MaxRecvSize=",
+ le32_to_cpu(nreq->max_receive_size),
+ "MaxFragmentedSize=",
+ le32_to_cpu(nreq->max_fragmented_size));
+
+ send_io->sge[0].addr = ib_dma_map_single(sc->ib.dev,
+ nreq,
+ sizeof(*nreq),
+ DMA_TO_DEVICE);
+ ret = ib_dma_mapping_error(sc->ib.dev, send_io->sge[0].addr);
+ if (ret) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "ib_dma_mapping_error() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ goto dma_mapping_failed;
+ }
+
+ send_io->sge[0].length = sizeof(*nreq);
+ send_io->sge[0].lkey = sc->ib.pd->local_dma_lkey;
+ send_io->num_sge = 1;
+
+ ib_dma_sync_single_for_device(sc->ib.dev,
+ send_io->sge[0].addr,
+ send_io->sge[0].length,
+ DMA_TO_DEVICE);
+
+ smbdirect_log_rdma_send(sc, SMBDIRECT_LOG_INFO,
+ "sge addr=0x%llx length=%u lkey=0x%x\n",
+ send_io->sge[0].addr,
+ send_io->sge[0].length,
+ send_io->sge[0].lkey);
+
+ /*
+ * Now post the recv_io buffer in order to get
+ * the negotiate response
+ */
+ sc->recv_io.expected = SMBDIRECT_EXPECT_NEGOTIATE_REP;
+ ret = smbdirect_connection_post_recv_io(recv_io);
+ if (ret) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "smbdirect_connection_post_recv_io() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ goto post_recv_io_failed;
+ }
+
+ send_io->wr.next = NULL;
+ send_io->wr.wr_cqe = &send_io->cqe;
+ send_io->wr.sg_list = send_io->sge;
+ send_io->wr.num_sge = send_io->num_sge;
+ send_io->wr.opcode = IB_WR_SEND;
+ send_io->wr.send_flags = IB_SEND_SIGNALED;
+
+ ret = smbdirect_connection_post_send_wr(sc, &send_io->wr);
+ if (ret) {
+ /* if we reach here, post send failed */
+ smbdirect_log_rdma_send(sc, SMBDIRECT_LOG_ERR,
+ "smbdirect_connection_post_send_wr() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ goto post_send_wr_failed;
+ }
+
+ /*
+ * start with the negotiate timeout and SMBDIRECT_KEEPALIVE_PENDING
+ * so that the timer will cause a disconnect.
+ */
+ sc->idle.keepalive = SMBDIRECT_KEEPALIVE_PENDING;
+ mod_delayed_work(sc->workqueue, &sc->idle.timer_work,
+ msecs_to_jiffies(sp->negotiate_timeout_msec));
+
+ return 0;
+
+post_send_wr_failed:
+ /*
+ * ib_dma_unmap_single is called in
+ * smbdirect_connection_free_send_io()
+ */
+ smbdirect_connection_free_send_io(send_io);
+ /*
+ * recv_io is given to the rdma layer,
+ * we should not put it even on error
+ * nor call smbdirect_connection_destroy_mem_pools()
+ * it will be cleaned up during disconnect.
+ */
+ return ret;
+
+post_recv_io_failed:
+ /*
+ * ib_dma_unmap_single is called in
+ * smbdirect_connection_free_send_io()
+ */
+dma_mapping_failed:
+ smbdirect_connection_free_send_io(send_io);
+
+alloc_send_io_failed:
+ smbdirect_connection_put_recv_io(recv_io);
+
+get_recv_io_failed:
+ smbdirect_connection_destroy_mem_pools(sc);
+
+create_mem_pools_failed:
+ return ret;
+}
+
+static void smbdirect_connect_negotiate_send_done(struct ib_cq *cq, struct ib_wc *wc)
+{
+ struct smbdirect_send_io *send_io =
+ container_of(wc->wr_cqe, struct smbdirect_send_io, cqe);
+ struct smbdirect_socket *sc = send_io->socket;
+
+ smbdirect_log_rdma_send(sc, SMBDIRECT_LOG_INFO,
+ "smbdirect_send_io completed. status='%s (%d)', opcode=%d\n",
+ ib_wc_status_msg(wc->status), wc->status, wc->opcode);
+
+ /* Note this frees wc->wr_cqe, but not wc */
+ smbdirect_connection_free_send_io(send_io);
+ atomic_dec(&sc->send_io.pending.count);
+
+ if (unlikely(wc->status != IB_WC_SUCCESS || WARN_ON_ONCE(wc->opcode != IB_WC_SEND))) {
+ if (wc->status != IB_WC_WR_FLUSH_ERR)
+ smbdirect_log_rdma_send(sc, SMBDIRECT_LOG_ERR,
+ "wc->status=%s (%d) wc->opcode=%d\n",
+ ib_wc_status_msg(wc->status), wc->status, wc->opcode);
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+ return;
+ }
+}
+
+static void smbdirect_connect_negotiate_recv_work(struct work_struct *work);
+
+static void smbdirect_connect_negotiate_recv_done(struct ib_cq *cq, struct ib_wc *wc)
+{
+ struct smbdirect_recv_io *recv_io =
+ container_of(wc->wr_cqe, struct smbdirect_recv_io, cqe);
+ struct smbdirect_socket *sc = recv_io->socket;
+ unsigned long flags;
+
+ if (unlikely(wc->status != IB_WC_SUCCESS || WARN_ON_ONCE(wc->opcode != IB_WC_RECV))) {
+ if (wc->status != IB_WC_WR_FLUSH_ERR)
+ smbdirect_log_rdma_recv(sc, SMBDIRECT_LOG_ERR,
+ "wc->status=%s (%d) wc->opcode=%d\n",
+ ib_wc_status_msg(wc->status), wc->status, wc->opcode);
+ goto error;
+ }
+
+ smbdirect_log_rdma_recv(sc, SMBDIRECT_LOG_INFO,
+ "smbdirect_recv_io completed. status='%s (%d)', opcode=%d\n",
+ ib_wc_status_msg(wc->status), wc->status, wc->opcode);
+
+ /*
+ * This is an internal error!
+ */
+ if (WARN_ON_ONCE(sc->recv_io.expected != SMBDIRECT_EXPECT_NEGOTIATE_REP))
+ goto error;
+
+ /*
+ * Don't reset timer to the keepalive interval in
+ * this will be done in smbdirect_accept_direct_negotiate_recv_work.
+ */
+
+ ib_dma_sync_single_for_cpu(sc->ib.dev,
+ recv_io->sge.addr,
+ recv_io->sge.length,
+ DMA_FROM_DEVICE);
+
+ /*
+ * Only remember recv_io if it has enough bytes,
+ * this gives smbdirect_accept_negotiate_recv_work enough
+ * information in order to disconnect if it was not
+ * valid.
+ */
+ sc->recv_io.reassembly.full_packet_received = true;
+ if (wc->byte_len >= sizeof(struct smbdirect_negotiate_resp))
+ smbdirect_connection_reassembly_append_recv_io(sc, recv_io, 0);
+ else
+ smbdirect_connection_put_recv_io(recv_io);
+
+ /*
+ * We continue via the workqueue as we may have
+ * complex work that might sleep.
+ *
+ * So we defer further processing of the negotiation
+ * to smbdirect_connect_negotiate_recv_work().
+ */
+ spin_lock_irqsave(&sc->connect.lock, flags);
+ if (!sc->first_error) {
+ INIT_WORK(&sc->connect.work, smbdirect_connect_negotiate_recv_work);
+ if (sc->status == SMBDIRECT_SOCKET_NEGOTIATE_RUNNING)
+ queue_work(sc->workqueue, &sc->connect.work);
+ }
+ spin_unlock_irqrestore(&sc->connect.lock, flags);
+
+ return;
+
+error:
+ /*
+ * recv_io.posted.refill_work is still disabled,
+ * so smbdirect_connection_put_recv_io() won't
+ * start it.
+ */
+ smbdirect_connection_put_recv_io(recv_io);
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+}
+
+static void smbdirect_connect_negotiate_recv_work(struct work_struct *work)
+{
+ struct smbdirect_socket *sc =
+ container_of(work, struct smbdirect_socket, connect.work);
+ struct smbdirect_socket_parameters *sp = &sc->parameters;
+ struct smbdirect_recv_io *recv_io;
+ struct smbdirect_negotiate_resp *nrep;
+ unsigned long flags;
+ u16 negotiated_version;
+ u16 credits_requested;
+ u16 credits_granted;
+ u32 status;
+ u32 max_readwrite_size;
+ u32 preferred_send_size;
+ u32 max_receive_size;
+ u32 max_fragmented_size;
+ int posted;
+ int ret;
+
+ if (sc->first_error)
+ return;
+
+ /*
+ * make sure we won't start again...
+ */
+ disable_work(work);
+
+ /*
+ * Reset timer to the keepalive interval in
+ * order to trigger our next keepalive message.
+ */
+ sc->idle.keepalive = SMBDIRECT_KEEPALIVE_NONE;
+ mod_delayed_work(sc->workqueue, &sc->idle.timer_work,
+ msecs_to_jiffies(sp->keepalive_interval_msec));
+
+ /*
+ * If smbdirect_connect_negotiate_recv_done() detected an
+ * invalid request we want to disconnect.
+ */
+ recv_io = smbdirect_connection_reassembly_first_recv_io(sc);
+ if (!recv_io) {
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+ return;
+ }
+ spin_lock_irqsave(&sc->recv_io.reassembly.lock, flags);
+ sc->recv_io.reassembly.queue_length--;
+ list_del(&recv_io->list);
+ spin_unlock_irqrestore(&sc->recv_io.reassembly.lock, flags);
+ smbdirect_connection_put_recv_io(recv_io);
+
+ if (SMBDIRECT_CHECK_STATUS_DISCONNECT(sc, SMBDIRECT_SOCKET_NEGOTIATE_RUNNING))
+ return;
+
+ /*
+ * Note recv_io is already part of the free list,
+ * as we just called smbdirect_connection_put_recv_io(),
+ * but it won't be reused before we call
+ * smbdirect_connection_recv_io_refill() below.
+ */
+
+ nrep = (struct smbdirect_negotiate_resp *)recv_io->packet;
+ negotiated_version = le16_to_cpu(nrep->negotiated_version);
+ credits_requested = le16_to_cpu(nrep->credits_requested);
+ credits_granted = le16_to_cpu(nrep->credits_granted);
+ status = le32_to_cpu(nrep->status);
+ max_readwrite_size = le32_to_cpu(nrep->max_readwrite_size);
+ preferred_send_size = le32_to_cpu(nrep->preferred_send_size);
+ max_receive_size = le32_to_cpu(nrep->max_receive_size);
+ max_fragmented_size = le32_to_cpu(nrep->max_fragmented_size);
+
+ smbdirect_log_negotiate(sc, SMBDIRECT_LOG_INFO,
+ "RepIn: %s%x, %s%x, %s%x, %s%u, %s%u, %s%x, %s%u, %s%u, %s%u, %s%u\n",
+ "MinVersion=0x",
+ le16_to_cpu(nrep->min_version),
+ "MaxVersion=0x",
+ le16_to_cpu(nrep->max_version),
+ "NegotiatedVersion=0x",
+ le16_to_cpu(nrep->negotiated_version),
+ "CreditsRequested=",
+ le16_to_cpu(nrep->credits_requested),
+ "CreditsGranted=",
+ le16_to_cpu(nrep->credits_granted),
+ "Status=0x",
+ le32_to_cpu(nrep->status),
+ "MaxReadWriteSize=",
+ le32_to_cpu(nrep->max_readwrite_size),
+ "PreferredSendSize=",
+ le32_to_cpu(nrep->preferred_send_size),
+ "MaxRecvSize=",
+ le32_to_cpu(nrep->max_receive_size),
+ "MaxFragmentedSize=",
+ le32_to_cpu(nrep->max_fragmented_size));
+
+ if (negotiated_version != SMBDIRECT_V1) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "invalid: negotiated_version=0x%x\n",
+ negotiated_version);
+ smbdirect_socket_schedule_cleanup(sc, -ECONNREFUSED);
+ return;
+ }
+
+ if (status != le32_to_cpu(STATUS_SUCCESS)) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "invalid: status=0x%x != 0x0\n",
+ status);
+ smbdirect_socket_schedule_cleanup(sc, -ECONNREFUSED);
+ return;
+ }
+
+ if (max_receive_size < SMBDIRECT_MIN_RECEIVE_SIZE) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "invalid: max_receive_size=%u < %u\n",
+ max_receive_size,
+ SMBDIRECT_MIN_RECEIVE_SIZE);
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+ return;
+ }
+
+ if (max_fragmented_size < SMBDIRECT_MIN_FRAGMENTED_SIZE) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "invalid: max_fragmented_size=%u < %u\n",
+ max_fragmented_size,
+ SMBDIRECT_MIN_FRAGMENTED_SIZE);
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+ return;
+ }
+
+ if (credits_granted == 0) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "invalid: credits_granted == 0\n");
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+ return;
+ }
+
+ if (credits_requested == 0) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "invalid: credits_requested == 0\n");
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+ return;
+ }
+
+ if (preferred_send_size > sp->max_recv_size) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "invalid: preferred_send_size=%u > max_recv_size=%u\n",
+ preferred_send_size,
+ sp->max_recv_size);
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+ return;
+ }
+
+ /*
+ * We take the value from the peer, which is checked to be higher than 0,
+ * but we limit it to the max value we support in order to have
+ * the main logic simpler.
+ */
+ sc->recv_io.credits.target = credits_requested;
+ sc->recv_io.credits.target = min_t(u16, sc->recv_io.credits.target,
+ sp->recv_credit_max);
+
+ /*
+ * At least the value of SMBDIRECT_MIN_RECEIVE_SIZE is used.
+ */
+ sp->max_recv_size = min_t(u32, sp->max_recv_size, preferred_send_size);
+ sp->max_recv_size = max_t(u32, sp->max_recv_size, SMBDIRECT_MIN_RECEIVE_SIZE);
+
+ /*
+ * We already sent our sp->max_fragmented_recv_size
+ * to the peer, so we can't lower it here any more.
+ *
+ * TODO: but if the peer lowered sp->max_recv_size
+ * we will have to adjust our number of buffers.
+ *
+ * But for now we keep it as the cifs.ko code
+ * worked before.
+ */
+
+ /*
+ * Note nrep->max_receive_size was already checked against
+ * SMBDIRECT_MIN_RECEIVE_SIZE above.
+ */
+ sp->max_send_size = min_t(u32, sp->max_send_size, max_receive_size);
+
+ /*
+ * Make sure the resulting max_frmr_depth is at least 1,
+ * which means max_read_write_size needs to be at least PAGE_SIZE.
+ */
+ sp->max_read_write_size = min_t(u32, sp->max_frmr_depth * PAGE_SIZE,
+ max_readwrite_size);
+ if (sp->max_read_write_size < PAGE_SIZE) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "invalid: max_readwrite_size=%u < PAGE_SIZE(%lu)\n",
+ max_readwrite_size,
+ PAGE_SIZE);
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+ return;
+ }
+ sp->max_frmr_depth = sp->max_read_write_size / PAGE_SIZE;
+
+ /*
+ * Note nrep->credits_granted was already checked against 0 above.
+ */
+ atomic_set(&sc->send_io.credits.count, credits_granted);
+
+ /*
+ * Note nrep->max_fragmented_size was already checked against
+ * SMBDIRECT_MIN_FRAGMENTED_SIZE above.
+ */
+ sp->max_fragmented_send_size = max_fragmented_size;
+
+ ret = smbdirect_connection_create_mr_list(sc);
+ if (ret) {
+ smbdirect_log_rdma_mr(sc, SMBDIRECT_LOG_ERR,
+ "smbdirect_connection_create_mr_list() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ smbdirect_socket_schedule_cleanup(sc, ret);
+ return;
+ }
+
+ /*
+ * Prepare for receiving data_transfer messages
+ */
+ sc->recv_io.reassembly.full_packet_received = true;
+ sc->recv_io.expected = SMBDIRECT_EXPECT_DATA_TRANSFER;
+ list_for_each_entry(recv_io, &sc->recv_io.free.list, list)
+ recv_io->cqe.done = smbdirect_connection_recv_io_done;
+ recv_io = NULL;
+
+ /*
+ * We should at least post 1 smbdirect_recv_io!
+ */
+ posted = smbdirect_connection_recv_io_refill(sc);
+ if (posted < 1) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "smbdirect_connection_recv_io_refill() failed %1pe\n",
+ SMBDIRECT_DEBUG_ERR_PTR(ret));
+ smbdirect_socket_schedule_cleanup(sc, -ECONNABORTED);
+ return;
+ }
+
+ /*
+ * smbdirect_connection_negotiation_done()
+ * will setup all required things and wake up
+ * the waiter.
+ */
+ smbdirect_connection_negotiation_done(sc);
+}
+
+__maybe_unused /* this is temporary while this file is included in others */
+static int smbdirect_connect_sync(struct smbdirect_socket *sc,
+ const struct sockaddr *dst)
+{
+ int ret;
+
+ ret = smbdirect_connect(sc, dst);
+ if (ret) {
+ smbdirect_log_rdma_event(sc, SMBDIRECT_LOG_ERR,
+ "smbdirect_connect(%pISpsfc) failed %1pe\n",
+ dst, SMBDIRECT_DEBUG_ERR_PTR(ret));
+ return ret;
+ }
+
+ ret = smbdirect_connection_wait_for_connected(sc);
+ if (ret) {
+ int lvl = SMBDIRECT_LOG_ERR;
+
+ if (ret == -ENODEV)
+ lvl = SMBDIRECT_LOG_INFO;
+
+ smbdirect_log_rdma_event(sc, lvl,
+ "wait for smbdirect_connect(%pISpsfc) failed %1pe\n",
+ dst, SMBDIRECT_DEBUG_ERR_PTR(ret));
+ return ret;
+ }
+
+ return 0;
+}
projects / thirdparty / linux.git / commitdiff
