| // SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause |
| |
| /* Authors: Bernard Metzler <bmt@zurich.ibm.com> */ |
| /* Fredy Neeser */ |
| /* Greg Joyce <greg@opengridcomputing.com> */ |
| /* Copyright (c) 2008-2019, IBM Corporation */ |
| /* Copyright (c) 2017, Open Grid Computing, Inc. */ |
| |
| #include <linux/errno.h> |
| #include <linux/types.h> |
| #include <linux/net.h> |
| #include <linux/inetdevice.h> |
| #include <net/addrconf.h> |
| #include <linux/workqueue.h> |
| #include <net/sock.h> |
| #include <net/tcp.h> |
| #include <linux/inet.h> |
| #include <linux/tcp.h> |
| |
| #include <rdma/iw_cm.h> |
| #include <rdma/ib_verbs.h> |
| #include <rdma/ib_user_verbs.h> |
| |
| #include "siw.h" |
| #include "siw_cm.h" |
| |
| /* |
| * Set to any combination of |
| * MPA_V2_RDMA_NO_RTR, MPA_V2_RDMA_READ_RTR, MPA_V2_RDMA_WRITE_RTR |
| */ |
| static __be16 rtr_type = MPA_V2_RDMA_READ_RTR | MPA_V2_RDMA_WRITE_RTR; |
| static const bool relaxed_ird_negotiation = 1; |
| |
| static void siw_cm_llp_state_change(struct sock *s); |
| static void siw_cm_llp_data_ready(struct sock *s); |
| static void siw_cm_llp_write_space(struct sock *s); |
| static void siw_cm_llp_error_report(struct sock *s); |
| static int siw_cm_upcall(struct siw_cep *cep, enum iw_cm_event_type reason, |
| int status); |
| |
| static void siw_sk_assign_cm_upcalls(struct sock *sk) |
| { |
| write_lock_bh(&sk->sk_callback_lock); |
| sk->sk_state_change = siw_cm_llp_state_change; |
| sk->sk_data_ready = siw_cm_llp_data_ready; |
| sk->sk_write_space = siw_cm_llp_write_space; |
| sk->sk_error_report = siw_cm_llp_error_report; |
| write_unlock_bh(&sk->sk_callback_lock); |
| } |
| |
| static void siw_sk_save_upcalls(struct sock *sk) |
| { |
| struct siw_cep *cep = sk_to_cep(sk); |
| |
| write_lock_bh(&sk->sk_callback_lock); |
| cep->sk_state_change = sk->sk_state_change; |
| cep->sk_data_ready = sk->sk_data_ready; |
| cep->sk_write_space = sk->sk_write_space; |
| cep->sk_error_report = sk->sk_error_report; |
| write_unlock_bh(&sk->sk_callback_lock); |
| } |
| |
| static void siw_sk_restore_upcalls(struct sock *sk, struct siw_cep *cep) |
| { |
| sk->sk_state_change = cep->sk_state_change; |
| sk->sk_data_ready = cep->sk_data_ready; |
| sk->sk_write_space = cep->sk_write_space; |
| sk->sk_error_report = cep->sk_error_report; |
| sk->sk_user_data = NULL; |
| } |
| |
| static void siw_qp_socket_assoc(struct siw_cep *cep, struct siw_qp *qp) |
| { |
| struct socket *s = cep->sock; |
| struct sock *sk = s->sk; |
| |
| write_lock_bh(&sk->sk_callback_lock); |
| |
| qp->attrs.sk = s; |
| sk->sk_data_ready = siw_qp_llp_data_ready; |
| sk->sk_write_space = siw_qp_llp_write_space; |
| |
| write_unlock_bh(&sk->sk_callback_lock); |
| } |
| |
| static void siw_socket_disassoc(struct socket *s) |
| { |
| struct sock *sk = s->sk; |
| struct siw_cep *cep; |
| |
| if (sk) { |
| write_lock_bh(&sk->sk_callback_lock); |
| cep = sk_to_cep(sk); |
| if (cep) { |
| siw_sk_restore_upcalls(sk, cep); |
| siw_cep_put(cep); |
| } else { |
| pr_warn("siw: cannot restore sk callbacks: no ep\n"); |
| } |
| write_unlock_bh(&sk->sk_callback_lock); |
| } else { |
| pr_warn("siw: cannot restore sk callbacks: no sk\n"); |
| } |
| } |
| |
| static void siw_rtr_data_ready(struct sock *sk) |
| { |
| struct siw_cep *cep; |
| struct siw_qp *qp = NULL; |
| read_descriptor_t rd_desc; |
| |
| read_lock(&sk->sk_callback_lock); |
| |
| cep = sk_to_cep(sk); |
| if (!cep) { |
| WARN(1, "No connection endpoint\n"); |
| goto out; |
| } |
| qp = sk_to_qp(sk); |
| |
| memset(&rd_desc, 0, sizeof(rd_desc)); |
| rd_desc.arg.data = qp; |
| rd_desc.count = 1; |
| |
| tcp_read_sock(sk, &rd_desc, siw_tcp_rx_data); |
| /* |
| * Check if first frame was successfully processed. |
| * Signal connection full establishment if yes. |
| * Failed data processing would have already scheduled |
| * connection drop. |
| */ |
| if (!qp->rx_stream.rx_suspend) |
| siw_cm_upcall(cep, IW_CM_EVENT_ESTABLISHED, 0); |
| out: |
| read_unlock(&sk->sk_callback_lock); |
| if (qp) |
| siw_qp_socket_assoc(cep, qp); |
| } |
| |
| static void siw_sk_assign_rtr_upcalls(struct siw_cep *cep) |
| { |
| struct sock *sk = cep->sock->sk; |
| |
| write_lock_bh(&sk->sk_callback_lock); |
| sk->sk_data_ready = siw_rtr_data_ready; |
| sk->sk_write_space = siw_qp_llp_write_space; |
| write_unlock_bh(&sk->sk_callback_lock); |
| } |
| |
| static void siw_cep_socket_assoc(struct siw_cep *cep, struct socket *s) |
| { |
| cep->sock = s; |
| siw_cep_get(cep); |
| s->sk->sk_user_data = cep; |
| |
| siw_sk_save_upcalls(s->sk); |
| siw_sk_assign_cm_upcalls(s->sk); |
| } |
| |
| static struct siw_cep *siw_cep_alloc(struct siw_device *sdev) |
| { |
| struct siw_cep *cep = kzalloc(sizeof(*cep), GFP_KERNEL); |
| unsigned long flags; |
| |
| if (!cep) |
| return NULL; |
| |
| INIT_LIST_HEAD(&cep->listenq); |
| INIT_LIST_HEAD(&cep->devq); |
| INIT_LIST_HEAD(&cep->work_freelist); |
| |
| kref_init(&cep->ref); |
| cep->state = SIW_EPSTATE_IDLE; |
| init_waitqueue_head(&cep->waitq); |
| spin_lock_init(&cep->lock); |
| cep->sdev = sdev; |
| cep->enhanced_rdma_conn_est = false; |
| |
| spin_lock_irqsave(&sdev->lock, flags); |
| list_add_tail(&cep->devq, &sdev->cep_list); |
| spin_unlock_irqrestore(&sdev->lock, flags); |
| |
| siw_dbg_cep(cep, "new endpoint\n"); |
| return cep; |
| } |
| |
| static void siw_cm_free_work(struct siw_cep *cep) |
| { |
| struct list_head *w, *tmp; |
| struct siw_cm_work *work; |
| |
| list_for_each_safe(w, tmp, &cep->work_freelist) { |
| work = list_entry(w, struct siw_cm_work, list); |
| list_del(&work->list); |
| kfree(work); |
| } |
| } |
| |
| static void siw_cancel_mpatimer(struct siw_cep *cep) |
| { |
| spin_lock_bh(&cep->lock); |
| if (cep->mpa_timer) { |
| if (cancel_delayed_work(&cep->mpa_timer->work)) { |
| siw_cep_put(cep); |
| kfree(cep->mpa_timer); /* not needed again */ |
| } |
| cep->mpa_timer = NULL; |
| } |
| spin_unlock_bh(&cep->lock); |
| } |
| |
| static void siw_put_work(struct siw_cm_work *work) |
| { |
| INIT_LIST_HEAD(&work->list); |
| spin_lock_bh(&work->cep->lock); |
| list_add(&work->list, &work->cep->work_freelist); |
| spin_unlock_bh(&work->cep->lock); |
| } |
| |
| static void siw_cep_set_inuse(struct siw_cep *cep) |
| { |
| unsigned long flags; |
| retry: |
| spin_lock_irqsave(&cep->lock, flags); |
| |
| if (cep->in_use) { |
| spin_unlock_irqrestore(&cep->lock, flags); |
| wait_event_interruptible(cep->waitq, !cep->in_use); |
| if (signal_pending(current)) |
| flush_signals(current); |
| goto retry; |
| } else { |
| cep->in_use = 1; |
| spin_unlock_irqrestore(&cep->lock, flags); |
| } |
| } |
| |
| static void siw_cep_set_free(struct siw_cep *cep) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&cep->lock, flags); |
| cep->in_use = 0; |
| spin_unlock_irqrestore(&cep->lock, flags); |
| |
| wake_up(&cep->waitq); |
| } |
| |
| static void __siw_cep_dealloc(struct kref *ref) |
| { |
| struct siw_cep *cep = container_of(ref, struct siw_cep, ref); |
| struct siw_device *sdev = cep->sdev; |
| unsigned long flags; |
| |
| WARN_ON(cep->listen_cep); |
| |
| /* kfree(NULL) is safe */ |
| kfree(cep->mpa.pdata); |
| spin_lock_bh(&cep->lock); |
| if (!list_empty(&cep->work_freelist)) |
| siw_cm_free_work(cep); |
| spin_unlock_bh(&cep->lock); |
| |
| spin_lock_irqsave(&sdev->lock, flags); |
| list_del(&cep->devq); |
| spin_unlock_irqrestore(&sdev->lock, flags); |
| |
| siw_dbg_cep(cep, "free endpoint\n"); |
| kfree(cep); |
| } |
| |
| static struct siw_cm_work *siw_get_work(struct siw_cep *cep) |
| { |
| struct siw_cm_work *work = NULL; |
| |
| spin_lock_bh(&cep->lock); |
| if (!list_empty(&cep->work_freelist)) { |
| work = list_entry(cep->work_freelist.next, struct siw_cm_work, |
| list); |
| list_del_init(&work->list); |
| } |
| spin_unlock_bh(&cep->lock); |
| return work; |
| } |
| |
| static int siw_cm_alloc_work(struct siw_cep *cep, int num) |
| { |
| struct siw_cm_work *work; |
| |
| while (num--) { |
| work = kmalloc(sizeof(*work), GFP_KERNEL); |
| if (!work) { |
| if (!(list_empty(&cep->work_freelist))) |
| siw_cm_free_work(cep); |
| return -ENOMEM; |
| } |
| work->cep = cep; |
| INIT_LIST_HEAD(&work->list); |
| list_add(&work->list, &cep->work_freelist); |
| } |
| return 0; |
| } |
| |
| /* |
| * siw_cm_upcall() |
| * |
| * Upcall to IWCM to inform about async connection events |
| */ |
| static int siw_cm_upcall(struct siw_cep *cep, enum iw_cm_event_type reason, |
| int status) |
| { |
| struct iw_cm_event event; |
| struct iw_cm_id *id; |
| |
| memset(&event, 0, sizeof(event)); |
| event.status = status; |
| event.event = reason; |
| |
| if (reason == IW_CM_EVENT_CONNECT_REQUEST) { |
| event.provider_data = cep; |
| id = cep->listen_cep->cm_id; |
| } else { |
| id = cep->cm_id; |
| } |
| /* Signal IRD and ORD */ |
| if (reason == IW_CM_EVENT_ESTABLISHED || |
| reason == IW_CM_EVENT_CONNECT_REPLY) { |
| /* Signal negotiated IRD/ORD values we will use */ |
| event.ird = cep->ird; |
| event.ord = cep->ord; |
| } else if (reason == IW_CM_EVENT_CONNECT_REQUEST) { |
| event.ird = cep->ord; |
| event.ord = cep->ird; |
| } |
| /* Signal private data and address information */ |
| if (reason == IW_CM_EVENT_CONNECT_REQUEST || |
| reason == IW_CM_EVENT_CONNECT_REPLY) { |
| u16 pd_len = be16_to_cpu(cep->mpa.hdr.params.pd_len); |
| |
| if (pd_len) { |
| /* |
| * hand over MPA private data |
| */ |
| event.private_data_len = pd_len; |
| event.private_data = cep->mpa.pdata; |
| |
| /* Hide MPA V2 IRD/ORD control */ |
| if (cep->enhanced_rdma_conn_est) { |
| event.private_data_len -= |
| sizeof(struct mpa_v2_data); |
| event.private_data += |
| sizeof(struct mpa_v2_data); |
| } |
| } |
| getname_local(cep->sock, &event.local_addr); |
| getname_peer(cep->sock, &event.remote_addr); |
| } |
| siw_dbg_cep(cep, "[QP %u]: reason=%d, status=%d\n", |
| cep->qp ? qp_id(cep->qp) : UINT_MAX, reason, status); |
| |
| return id->event_handler(id, &event); |
| } |
| |
| /* |
| * siw_qp_cm_drop() |
| * |
| * Drops established LLP connection if present and not already |
| * scheduled for dropping. Called from user context, SQ workqueue |
| * or receive IRQ. Caller signals if socket can be immediately |
| * closed (basically, if not in IRQ). |
| */ |
| void siw_qp_cm_drop(struct siw_qp *qp, int schedule) |
| { |
| struct siw_cep *cep = qp->cep; |
| |
| qp->rx_stream.rx_suspend = 1; |
| qp->tx_ctx.tx_suspend = 1; |
| |
| if (!qp->cep) |
| return; |
| |
| if (schedule) { |
| siw_cm_queue_work(cep, SIW_CM_WORK_CLOSE_LLP); |
| } else { |
| siw_cep_set_inuse(cep); |
| |
| if (cep->state == SIW_EPSTATE_CLOSED) { |
| siw_dbg_cep(cep, "already closed\n"); |
| goto out; |
| } |
| siw_dbg_cep(cep, "immediate close, state %d\n", cep->state); |
| |
| if (qp->term_info.valid) |
| siw_send_terminate(qp); |
| |
| if (cep->cm_id) { |
| switch (cep->state) { |
| case SIW_EPSTATE_AWAIT_MPAREP: |
| siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY, |
| -EINVAL); |
| break; |
| |
| case SIW_EPSTATE_RDMA_MODE: |
| siw_cm_upcall(cep, IW_CM_EVENT_CLOSE, 0); |
| break; |
| |
| case SIW_EPSTATE_IDLE: |
| case SIW_EPSTATE_LISTENING: |
| case SIW_EPSTATE_CONNECTING: |
| case SIW_EPSTATE_AWAIT_MPAREQ: |
| case SIW_EPSTATE_RECVD_MPAREQ: |
| case SIW_EPSTATE_CLOSED: |
| default: |
| break; |
| } |
| cep->cm_id->rem_ref(cep->cm_id); |
| cep->cm_id = NULL; |
| siw_cep_put(cep); |
| } |
| cep->state = SIW_EPSTATE_CLOSED; |
| |
| if (cep->sock) { |
| siw_socket_disassoc(cep->sock); |
| /* |
| * Immediately close socket |
| */ |
| sock_release(cep->sock); |
| cep->sock = NULL; |
| } |
| if (cep->qp) { |
| cep->qp = NULL; |
| siw_qp_put(qp); |
| } |
| out: |
| siw_cep_set_free(cep); |
| } |
| } |
| |
| void siw_cep_put(struct siw_cep *cep) |
| { |
| WARN_ON(kref_read(&cep->ref) < 1); |
| kref_put(&cep->ref, __siw_cep_dealloc); |
| } |
| |
| void siw_cep_get(struct siw_cep *cep) |
| { |
| kref_get(&cep->ref); |
| } |
| |
| /* |
| * Expects params->pd_len in host byte order |
| */ |
| static int siw_send_mpareqrep(struct siw_cep *cep, const void *pdata, u8 pd_len) |
| { |
| struct socket *s = cep->sock; |
| struct mpa_rr *rr = &cep->mpa.hdr; |
| struct kvec iov[3]; |
| struct msghdr msg; |
| int rv; |
| int iovec_num = 0; |
| int mpa_len; |
| |
| memset(&msg, 0, sizeof(msg)); |
| |
| iov[iovec_num].iov_base = rr; |
| iov[iovec_num].iov_len = sizeof(*rr); |
| mpa_len = sizeof(*rr); |
| |
| if (cep->enhanced_rdma_conn_est) { |
| iovec_num++; |
| iov[iovec_num].iov_base = &cep->mpa.v2_ctrl; |
| iov[iovec_num].iov_len = sizeof(cep->mpa.v2_ctrl); |
| mpa_len += sizeof(cep->mpa.v2_ctrl); |
| } |
| if (pd_len) { |
| iovec_num++; |
| iov[iovec_num].iov_base = (char *)pdata; |
| iov[iovec_num].iov_len = pd_len; |
| mpa_len += pd_len; |
| } |
| if (cep->enhanced_rdma_conn_est) |
| pd_len += sizeof(cep->mpa.v2_ctrl); |
| |
| rr->params.pd_len = cpu_to_be16(pd_len); |
| |
| rv = kernel_sendmsg(s, &msg, iov, iovec_num + 1, mpa_len); |
| |
| return rv < 0 ? rv : 0; |
| } |
| |
| /* |
| * Receive MPA Request/Reply header. |
| * |
| * Returns 0 if complete MPA Request/Reply header including |
| * eventual private data was received. Returns -EAGAIN if |
| * header was partially received or negative error code otherwise. |
| * |
| * Context: May be called in process context only |
| */ |
| static int siw_recv_mpa_rr(struct siw_cep *cep) |
| { |
| struct mpa_rr *hdr = &cep->mpa.hdr; |
| struct socket *s = cep->sock; |
| u16 pd_len; |
| int rcvd, to_rcv; |
| |
| if (cep->mpa.bytes_rcvd < sizeof(struct mpa_rr)) { |
| rcvd = ksock_recv(s, (char *)hdr + cep->mpa.bytes_rcvd, |
| sizeof(struct mpa_rr) - cep->mpa.bytes_rcvd, |
| 0); |
| if (rcvd <= 0) |
| return -ECONNABORTED; |
| |
| cep->mpa.bytes_rcvd += rcvd; |
| |
| if (cep->mpa.bytes_rcvd < sizeof(struct mpa_rr)) |
| return -EAGAIN; |
| |
| if (be16_to_cpu(hdr->params.pd_len) > MPA_MAX_PRIVDATA) |
| return -EPROTO; |
| } |
| pd_len = be16_to_cpu(hdr->params.pd_len); |
| |
| /* |
| * At least the MPA Request/Reply header (frame not including |
| * private data) has been received. |
| * Receive (or continue receiving) any private data. |
| */ |
| to_rcv = pd_len - (cep->mpa.bytes_rcvd - sizeof(struct mpa_rr)); |
| |
| if (!to_rcv) { |
| /* |
| * We must have hdr->params.pd_len == 0 and thus received a |
| * complete MPA Request/Reply frame. |
| * Check against peer protocol violation. |
| */ |
| u32 word; |
| |
| rcvd = ksock_recv(s, (char *)&word, sizeof(word), MSG_DONTWAIT); |
| if (rcvd == -EAGAIN) |
| return 0; |
| |
| if (rcvd == 0) { |
| siw_dbg_cep(cep, "peer EOF\n"); |
| return -EPIPE; |
| } |
| if (rcvd < 0) { |
| siw_dbg_cep(cep, "error: %d\n", rcvd); |
| return rcvd; |
| } |
| siw_dbg_cep(cep, "peer sent extra data: %d\n", rcvd); |
| |
| return -EPROTO; |
| } |
| |
| /* |
| * At this point, we must have hdr->params.pd_len != 0. |
| * A private data buffer gets allocated if hdr->params.pd_len != 0. |
| */ |
| if (!cep->mpa.pdata) { |
| cep->mpa.pdata = kmalloc(pd_len + 4, GFP_KERNEL); |
| if (!cep->mpa.pdata) |
| return -ENOMEM; |
| } |
| rcvd = ksock_recv( |
| s, cep->mpa.pdata + cep->mpa.bytes_rcvd - sizeof(struct mpa_rr), |
| to_rcv + 4, MSG_DONTWAIT); |
| |
| if (rcvd < 0) |
| return rcvd; |
| |
| if (rcvd > to_rcv) |
| return -EPROTO; |
| |
| cep->mpa.bytes_rcvd += rcvd; |
| |
| if (to_rcv == rcvd) { |
| siw_dbg_cep(cep, "%d bytes private data received\n", pd_len); |
| return 0; |
| } |
| return -EAGAIN; |
| } |
| |
| /* |
| * siw_proc_mpareq() |
| * |
| * Read MPA Request from socket and signal new connection to IWCM |
| * if success. Caller must hold lock on corresponding listening CEP. |
| */ |
| static int siw_proc_mpareq(struct siw_cep *cep) |
| { |
| struct mpa_rr *req; |
| int version, rv; |
| u16 pd_len; |
| |
| rv = siw_recv_mpa_rr(cep); |
| if (rv) |
| return rv; |
| |
| req = &cep->mpa.hdr; |
| |
| version = __mpa_rr_revision(req->params.bits); |
| pd_len = be16_to_cpu(req->params.pd_len); |
| |
| if (version > MPA_REVISION_2) |
| /* allow for 0, 1, and 2 only */ |
| return -EPROTO; |
| |
| if (memcmp(req->key, MPA_KEY_REQ, 16)) |
| return -EPROTO; |
| |
| /* Prepare for sending MPA reply */ |
| memcpy(req->key, MPA_KEY_REP, 16); |
| |
| if (version == MPA_REVISION_2 && |
| (req->params.bits & MPA_RR_FLAG_ENHANCED)) { |
| /* |
| * MPA version 2 must signal IRD/ORD values and P2P mode |
| * in private data if header flag MPA_RR_FLAG_ENHANCED |
| * is set. |
| */ |
| if (pd_len < sizeof(struct mpa_v2_data)) |
| goto reject_conn; |
| |
| cep->enhanced_rdma_conn_est = true; |
| } |
| |
| /* MPA Markers: currently not supported. Marker TX to be added. */ |
| if (req->params.bits & MPA_RR_FLAG_MARKERS) |
| goto reject_conn; |
| |
| if (req->params.bits & MPA_RR_FLAG_CRC) { |
| /* |
| * RFC 5044, page 27: CRC MUST be used if peer requests it. |
| * siw specific: 'mpa_crc_strict' parameter to reject |
| * connection with CRC if local CRC off enforced by |
| * 'mpa_crc_strict' module parameter. |
| */ |
| if (!mpa_crc_required && mpa_crc_strict) |
| goto reject_conn; |
| |
| /* Enable CRC if requested by module parameter */ |
| if (mpa_crc_required) |
| req->params.bits |= MPA_RR_FLAG_CRC; |
| } |
| if (cep->enhanced_rdma_conn_est) { |
| struct mpa_v2_data *v2 = (struct mpa_v2_data *)cep->mpa.pdata; |
| |
| /* |
| * Peer requested ORD becomes requested local IRD, |
| * peer requested IRD becomes requested local ORD. |
| * IRD and ORD get limited by global maximum values. |
| */ |
| cep->ord = ntohs(v2->ird) & MPA_IRD_ORD_MASK; |
| cep->ord = min(cep->ord, SIW_MAX_ORD_QP); |
| cep->ird = ntohs(v2->ord) & MPA_IRD_ORD_MASK; |
| cep->ird = min(cep->ird, SIW_MAX_IRD_QP); |
| |
| /* May get overwritten by locally negotiated values */ |
| cep->mpa.v2_ctrl.ird = htons(cep->ird); |
| cep->mpa.v2_ctrl.ord = htons(cep->ord); |
| |
| /* |
| * Support for peer sent zero length Write or Read to |
| * let local side enter RTS. Writes are preferred. |
| * Sends would require pre-posting a Receive and are |
| * not supported. |
| * Propose zero length Write if none of Read and Write |
| * is indicated. |
| */ |
| if (v2->ird & MPA_V2_PEER_TO_PEER) { |
| cep->mpa.v2_ctrl.ird |= MPA_V2_PEER_TO_PEER; |
| |
| if (v2->ord & MPA_V2_RDMA_WRITE_RTR) |
| cep->mpa.v2_ctrl.ord |= MPA_V2_RDMA_WRITE_RTR; |
| else if (v2->ord & MPA_V2_RDMA_READ_RTR) |
| cep->mpa.v2_ctrl.ord |= MPA_V2_RDMA_READ_RTR; |
| else |
| cep->mpa.v2_ctrl.ord |= MPA_V2_RDMA_WRITE_RTR; |
| } |
| } |
| |
| cep->state = SIW_EPSTATE_RECVD_MPAREQ; |
| |
| /* Keep reference until IWCM accepts/rejects */ |
| siw_cep_get(cep); |
| rv = siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REQUEST, 0); |
| if (rv) |
| siw_cep_put(cep); |
| |
| return rv; |
| |
| reject_conn: |
| siw_dbg_cep(cep, "reject: crc %d:%d:%d, m %d:%d\n", |
| req->params.bits & MPA_RR_FLAG_CRC ? 1 : 0, |
| mpa_crc_required, mpa_crc_strict, |
| req->params.bits & MPA_RR_FLAG_MARKERS ? 1 : 0, 0); |
| |
| req->params.bits &= ~MPA_RR_FLAG_MARKERS; |
| req->params.bits |= MPA_RR_FLAG_REJECT; |
| |
| if (!mpa_crc_required && mpa_crc_strict) |
| req->params.bits &= ~MPA_RR_FLAG_CRC; |
| |
| if (pd_len) |
| kfree(cep->mpa.pdata); |
| |
| cep->mpa.pdata = NULL; |
| |
| siw_send_mpareqrep(cep, NULL, 0); |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static int siw_proc_mpareply(struct siw_cep *cep) |
| { |
| struct siw_qp_attrs qp_attrs; |
| enum siw_qp_attr_mask qp_attr_mask; |
| struct siw_qp *qp = cep->qp; |
| struct mpa_rr *rep; |
| int rv; |
| u16 rep_ord; |
| u16 rep_ird; |
| bool ird_insufficient = false; |
| enum mpa_v2_ctrl mpa_p2p_mode = MPA_V2_RDMA_NO_RTR; |
| |
| rv = siw_recv_mpa_rr(cep); |
| if (rv != -EAGAIN) |
| siw_cancel_mpatimer(cep); |
| if (rv) |
| goto out_err; |
| |
| rep = &cep->mpa.hdr; |
| |
| if (__mpa_rr_revision(rep->params.bits) > MPA_REVISION_2) { |
| /* allow for 0, 1, and 2 only */ |
| rv = -EPROTO; |
| goto out_err; |
| } |
| if (memcmp(rep->key, MPA_KEY_REP, 16)) { |
| siw_init_terminate(qp, TERM_ERROR_LAYER_LLP, LLP_ETYPE_MPA, |
| LLP_ECODE_INVALID_REQ_RESP, 0); |
| siw_send_terminate(qp); |
| rv = -EPROTO; |
| goto out_err; |
| } |
| if (rep->params.bits & MPA_RR_FLAG_REJECT) { |
| siw_dbg_cep(cep, "got mpa reject\n"); |
| siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY, -ECONNRESET); |
| |
| return -ECONNRESET; |
| } |
| if (try_gso && rep->params.bits & MPA_RR_FLAG_GSO_EXP) { |
| siw_dbg_cep(cep, "peer allows GSO on TX\n"); |
| qp->tx_ctx.gso_seg_limit = 0; |
| } |
| if ((rep->params.bits & MPA_RR_FLAG_MARKERS) || |
| (mpa_crc_required && !(rep->params.bits & MPA_RR_FLAG_CRC)) || |
| (mpa_crc_strict && !mpa_crc_required && |
| (rep->params.bits & MPA_RR_FLAG_CRC))) { |
| siw_dbg_cep(cep, "reply unsupp: crc %d:%d:%d, m %d:%d\n", |
| rep->params.bits & MPA_RR_FLAG_CRC ? 1 : 0, |
| mpa_crc_required, mpa_crc_strict, |
| rep->params.bits & MPA_RR_FLAG_MARKERS ? 1 : 0, 0); |
| |
| siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY, -ECONNREFUSED); |
| |
| return -EINVAL; |
| } |
| if (cep->enhanced_rdma_conn_est) { |
| struct mpa_v2_data *v2; |
| |
| if (__mpa_rr_revision(rep->params.bits) < MPA_REVISION_2 || |
| !(rep->params.bits & MPA_RR_FLAG_ENHANCED)) { |
| /* |
| * Protocol failure: The responder MUST reply with |
| * MPA version 2 and MUST set MPA_RR_FLAG_ENHANCED. |
| */ |
| siw_dbg_cep(cep, "mpa reply error: vers %d, enhcd %d\n", |
| __mpa_rr_revision(rep->params.bits), |
| rep->params.bits & MPA_RR_FLAG_ENHANCED ? |
| 1 : |
| 0); |
| |
| siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY, |
| -ECONNRESET); |
| return -EINVAL; |
| } |
| v2 = (struct mpa_v2_data *)cep->mpa.pdata; |
| rep_ird = ntohs(v2->ird) & MPA_IRD_ORD_MASK; |
| rep_ord = ntohs(v2->ord) & MPA_IRD_ORD_MASK; |
| |
| if (cep->ird < rep_ord && |
| (relaxed_ird_negotiation == false || |
| rep_ord > cep->sdev->attrs.max_ird)) { |
| siw_dbg_cep(cep, "ird %d, rep_ord %d, max_ord %d\n", |
| cep->ird, rep_ord, |
| cep->sdev->attrs.max_ord); |
| ird_insufficient = true; |
| } |
| if (cep->ord > rep_ird && relaxed_ird_negotiation == false) { |
| siw_dbg_cep(cep, "ord %d, rep_ird %d\n", cep->ord, |
| rep_ird); |
| ird_insufficient = true; |
| } |
| /* |
| * Always report negotiated peer values to user, |
| * even if IRD/ORD negotiation failed |
| */ |
| cep->ird = rep_ord; |
| cep->ord = rep_ird; |
| |
| if (ird_insufficient) { |
| /* |
| * If the initiator IRD is insuffient for the |
| * responder ORD, send a TERM. |
| */ |
| siw_init_terminate(qp, TERM_ERROR_LAYER_LLP, |
| LLP_ETYPE_MPA, |
| LLP_ECODE_INSUFFICIENT_IRD, 0); |
| siw_send_terminate(qp); |
| rv = -ENOMEM; |
| goto out_err; |
| } |
| if (cep->mpa.v2_ctrl_req.ird & MPA_V2_PEER_TO_PEER) |
| mpa_p2p_mode = |
| cep->mpa.v2_ctrl_req.ord & |
| (MPA_V2_RDMA_WRITE_RTR | MPA_V2_RDMA_READ_RTR); |
| |
| /* |
| * Check if we requested P2P mode, and if peer agrees |
| */ |
| if (mpa_p2p_mode != MPA_V2_RDMA_NO_RTR) { |
| if ((mpa_p2p_mode & v2->ord) == 0) { |
| /* |
| * We requested RTR mode(s), but the peer |
| * did not pick any mode we support. |
| */ |
| siw_dbg_cep(cep, |
| "rtr mode: req %2x, got %2x\n", |
| mpa_p2p_mode, |
| v2->ord & (MPA_V2_RDMA_WRITE_RTR | |
| MPA_V2_RDMA_READ_RTR)); |
| |
| siw_init_terminate(qp, TERM_ERROR_LAYER_LLP, |
| LLP_ETYPE_MPA, |
| LLP_ECODE_NO_MATCHING_RTR, |
| 0); |
| siw_send_terminate(qp); |
| rv = -EPROTO; |
| goto out_err; |
| } |
| mpa_p2p_mode = v2->ord & (MPA_V2_RDMA_WRITE_RTR | |
| MPA_V2_RDMA_READ_RTR); |
| } |
| } |
| memset(&qp_attrs, 0, sizeof(qp_attrs)); |
| |
| if (rep->params.bits & MPA_RR_FLAG_CRC) |
| qp_attrs.flags = SIW_MPA_CRC; |
| |
| qp_attrs.irq_size = cep->ird; |
| qp_attrs.orq_size = cep->ord; |
| qp_attrs.sk = cep->sock; |
| qp_attrs.state = SIW_QP_STATE_RTS; |
| |
| qp_attr_mask = SIW_QP_ATTR_STATE | SIW_QP_ATTR_LLP_HANDLE | |
| SIW_QP_ATTR_ORD | SIW_QP_ATTR_IRD | SIW_QP_ATTR_MPA; |
| |
| /* Move socket RX/TX under QP control */ |
| down_write(&qp->state_lock); |
| if (qp->attrs.state > SIW_QP_STATE_RTR) { |
| rv = -EINVAL; |
| up_write(&qp->state_lock); |
| goto out_err; |
| } |
| rv = siw_qp_modify(qp, &qp_attrs, qp_attr_mask); |
| |
| siw_qp_socket_assoc(cep, qp); |
| |
| up_write(&qp->state_lock); |
| |
| /* Send extra RDMA frame to trigger peer RTS if negotiated */ |
| if (mpa_p2p_mode != MPA_V2_RDMA_NO_RTR) { |
| rv = siw_qp_mpa_rts(qp, mpa_p2p_mode); |
| if (rv) |
| goto out_err; |
| } |
| if (!rv) { |
| rv = siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY, 0); |
| if (!rv) |
| cep->state = SIW_EPSTATE_RDMA_MODE; |
| |
| return 0; |
| } |
| |
| out_err: |
| siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY, -EINVAL); |
| |
| return rv; |
| } |
| |
| /* |
| * siw_accept_newconn - accept an incoming pending connection |
| * |
| */ |
| static void siw_accept_newconn(struct siw_cep *cep) |
| { |
| struct socket *s = cep->sock; |
| struct socket *new_s = NULL; |
| struct siw_cep *new_cep = NULL; |
| int rv = 0; /* debug only. should disappear */ |
| |
| if (cep->state != SIW_EPSTATE_LISTENING) |
| goto error; |
| |
| new_cep = siw_cep_alloc(cep->sdev); |
| if (!new_cep) |
| goto error; |
| |
| /* |
| * 4: Allocate a sufficient number of work elements |
| * to allow concurrent handling of local + peer close |
| * events, MPA header processing + MPA timeout. |
| */ |
| if (siw_cm_alloc_work(new_cep, 4) != 0) |
| goto error; |
| |
| /* |
| * Copy saved socket callbacks from listening CEP |
| * and assign new socket with new CEP |
| */ |
| new_cep->sk_state_change = cep->sk_state_change; |
| new_cep->sk_data_ready = cep->sk_data_ready; |
| new_cep->sk_write_space = cep->sk_write_space; |
| new_cep->sk_error_report = cep->sk_error_report; |
| |
| rv = kernel_accept(s, &new_s, O_NONBLOCK); |
| if (rv != 0) { |
| /* |
| * Connection already aborted by peer..? |
| */ |
| siw_dbg_cep(cep, "kernel_accept() error: %d\n", rv); |
| goto error; |
| } |
| new_cep->sock = new_s; |
| siw_cep_get(new_cep); |
| new_s->sk->sk_user_data = new_cep; |
| |
| if (siw_tcp_nagle == false) { |
| int val = 1; |
| |
| rv = kernel_setsockopt(new_s, SOL_TCP, TCP_NODELAY, |
| (char *)&val, sizeof(val)); |
| if (rv) { |
| siw_dbg_cep(cep, "setsockopt NODELAY error: %d\n", rv); |
| goto error; |
| } |
| } |
| new_cep->state = SIW_EPSTATE_AWAIT_MPAREQ; |
| |
| rv = siw_cm_queue_work(new_cep, SIW_CM_WORK_MPATIMEOUT); |
| if (rv) |
| goto error; |
| /* |
| * See siw_proc_mpareq() etc. for the use of new_cep->listen_cep. |
| */ |
| new_cep->listen_cep = cep; |
| siw_cep_get(cep); |
| |
| if (atomic_read(&new_s->sk->sk_rmem_alloc)) { |
| /* |
| * MPA REQ already queued |
| */ |
| siw_dbg_cep(cep, "immediate mpa request\n"); |
| |
| siw_cep_set_inuse(new_cep); |
| rv = siw_proc_mpareq(new_cep); |
| siw_cep_set_free(new_cep); |
| |
| if (rv != -EAGAIN) { |
| siw_cep_put(cep); |
| new_cep->listen_cep = NULL; |
| if (rv) |
| goto error; |
| } |
| } |
| return; |
| |
| error: |
| if (new_cep) |
| siw_cep_put(new_cep); |
| |
| if (new_s) { |
| siw_socket_disassoc(new_s); |
| sock_release(new_s); |
| new_cep->sock = NULL; |
| } |
| siw_dbg_cep(cep, "error %d\n", rv); |
| } |
| |
| static void siw_cm_work_handler(struct work_struct *w) |
| { |
| struct siw_cm_work *work; |
| struct siw_cep *cep; |
| int release_cep = 0, rv = 0; |
| |
| work = container_of(w, struct siw_cm_work, work.work); |
| cep = work->cep; |
| |
| siw_dbg_cep(cep, "[QP %u]: work type: %d, state %d\n", |
| cep->qp ? qp_id(cep->qp) : UINT_MAX, |
| work->type, cep->state); |
| |
| siw_cep_set_inuse(cep); |
| |
| switch (work->type) { |
| case SIW_CM_WORK_ACCEPT: |
| siw_accept_newconn(cep); |
| break; |
| |
| case SIW_CM_WORK_READ_MPAHDR: |
| if (cep->state == SIW_EPSTATE_AWAIT_MPAREQ) { |
| if (cep->listen_cep) { |
| siw_cep_set_inuse(cep->listen_cep); |
| |
| if (cep->listen_cep->state == |
| SIW_EPSTATE_LISTENING) |
| rv = siw_proc_mpareq(cep); |
| else |
| rv = -EFAULT; |
| |
| siw_cep_set_free(cep->listen_cep); |
| |
| if (rv != -EAGAIN) { |
| siw_cep_put(cep->listen_cep); |
| cep->listen_cep = NULL; |
| if (rv) |
| siw_cep_put(cep); |
| } |
| } |
| } else if (cep->state == SIW_EPSTATE_AWAIT_MPAREP) { |
| rv = siw_proc_mpareply(cep); |
| } else { |
| /* |
| * CEP already moved out of MPA handshake. |
| * any connection management already done. |
| * silently ignore the mpa packet. |
| */ |
| if (cep->state == SIW_EPSTATE_RDMA_MODE) { |
| cep->sock->sk->sk_data_ready(cep->sock->sk); |
| siw_dbg_cep(cep, "already in RDMA mode"); |
| } else { |
| siw_dbg_cep(cep, "out of state: %d\n", |
| cep->state); |
| } |
| } |
| if (rv && rv != EAGAIN) |
| release_cep = 1; |
| break; |
| |
| case SIW_CM_WORK_CLOSE_LLP: |
| /* |
| * QP scheduled LLP close |
| */ |
| if (cep->qp && cep->qp->term_info.valid) |
| siw_send_terminate(cep->qp); |
| |
| if (cep->cm_id) |
| siw_cm_upcall(cep, IW_CM_EVENT_CLOSE, 0); |
| |
| release_cep = 1; |
| break; |
| |
| case SIW_CM_WORK_PEER_CLOSE: |
| if (cep->cm_id) { |
| if (cep->state == SIW_EPSTATE_AWAIT_MPAREP) { |
| /* |
| * MPA reply not received, but connection drop |
| */ |
| siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY, |
| -ECONNRESET); |
| } else if (cep->state == SIW_EPSTATE_RDMA_MODE) { |
| /* |
| * NOTE: IW_CM_EVENT_DISCONNECT is given just |
| * to transition IWCM into CLOSING. |
| */ |
| siw_cm_upcall(cep, IW_CM_EVENT_DISCONNECT, 0); |
| siw_cm_upcall(cep, IW_CM_EVENT_CLOSE, 0); |
| } |
| /* |
| * for other states there is no connection |
| * known to the IWCM. |
| */ |
| } else { |
| if (cep->state == SIW_EPSTATE_RECVD_MPAREQ) { |
| /* |
| * Wait for the ulp/CM to call accept/reject |
| */ |
| siw_dbg_cep(cep, |
| "mpa req recvd, wait for ULP\n"); |
| } else if (cep->state == SIW_EPSTATE_AWAIT_MPAREQ) { |
| /* |
| * Socket close before MPA request received. |
| */ |
| siw_dbg_cep(cep, "no mpareq: drop listener\n"); |
| siw_cep_put(cep->listen_cep); |
| cep->listen_cep = NULL; |
| } |
| } |
| release_cep = 1; |
| break; |
| |
| case SIW_CM_WORK_MPATIMEOUT: |
| cep->mpa_timer = NULL; |
| |
| if (cep->state == SIW_EPSTATE_AWAIT_MPAREP) { |
| /* |
| * MPA request timed out: |
| * Hide any partially received private data and signal |
| * timeout |
| */ |
| cep->mpa.hdr.params.pd_len = 0; |
| |
| if (cep->cm_id) |
| siw_cm_upcall(cep, IW_CM_EVENT_CONNECT_REPLY, |
| -ETIMEDOUT); |
| release_cep = 1; |
| |
| } else if (cep->state == SIW_EPSTATE_AWAIT_MPAREQ) { |
| /* |
| * No MPA request received after peer TCP stream setup. |
| */ |
| if (cep->listen_cep) { |
| siw_cep_put(cep->listen_cep); |
| cep->listen_cep = NULL; |
| } |
| release_cep = 1; |
| } |
| break; |
| |
| default: |
| WARN(1, "Undefined CM work type: %d\n", work->type); |
| } |
| if (release_cep) { |
| siw_dbg_cep(cep, |
| "release: timer=%s, QP[%u]\n", |
| cep->mpa_timer ? "y" : "n", |
| cep->qp ? qp_id(cep->qp) : UINT_MAX); |
| |
| siw_cancel_mpatimer(cep); |
| |
| cep->state = SIW_EPSTATE_CLOSED; |
| |
| if (cep->qp) { |
| struct siw_qp *qp = cep->qp; |
| /* |
| * Serialize a potential race with application |
| * closing the QP and calling siw_qp_cm_drop() |
| */ |
| siw_qp_get(qp); |
| siw_cep_set_free(cep); |
| |
| siw_qp_llp_close(qp); |
| siw_qp_put(qp); |
| |
| siw_cep_set_inuse(cep); |
| cep->qp = NULL; |
| siw_qp_put(qp); |
| } |
| if (cep->sock) { |
| siw_socket_disassoc(cep->sock); |
| sock_release(cep->sock); |
| cep->sock = NULL; |
| } |
| if (cep->cm_id) { |
| cep->cm_id->rem_ref(cep->cm_id); |
| cep->cm_id = NULL; |
| siw_cep_put(cep); |
| } |
| } |
| siw_cep_set_free(cep); |
| siw_put_work(work); |
| siw_cep_put(cep); |
| } |
| |
| static struct workqueue_struct *siw_cm_wq; |
| |
| int siw_cm_queue_work(struct siw_cep *cep, enum siw_work_type type) |
| { |
| struct siw_cm_work *work = siw_get_work(cep); |
| unsigned long delay = 0; |
| |
| if (!work) { |
| siw_dbg_cep(cep, "failed with no work available\n"); |
| return -ENOMEM; |
| } |
| work->type = type; |
| work->cep = cep; |
| |
| siw_cep_get(cep); |
| |
| INIT_DELAYED_WORK(&work->work, siw_cm_work_handler); |
| |
| if (type == SIW_CM_WORK_MPATIMEOUT) { |
| cep->mpa_timer = work; |
| |
| if (cep->state == SIW_EPSTATE_AWAIT_MPAREP) |
| delay = MPAREQ_TIMEOUT; |
| else |
| delay = MPAREP_TIMEOUT; |
| } |
| siw_dbg_cep(cep, "[QP %u]: work type: %d, timeout %lu\n", |
| cep->qp ? qp_id(cep->qp) : -1, type, delay); |
| |
| queue_delayed_work(siw_cm_wq, &work->work, delay); |
| |
| return 0; |
| } |
| |
| static void siw_cm_llp_data_ready(struct sock *sk) |
| { |
| struct siw_cep *cep; |
| |
| read_lock(&sk->sk_callback_lock); |
| |
| cep = sk_to_cep(sk); |
| if (!cep) { |
| WARN_ON(1); |
| goto out; |
| } |
| siw_dbg_cep(cep, "state: %d\n", cep->state); |
| |
| switch (cep->state) { |
| case SIW_EPSTATE_RDMA_MODE: |
| /* fall through */ |
| case SIW_EPSTATE_LISTENING: |
| break; |
| |
| case SIW_EPSTATE_AWAIT_MPAREQ: |
| /* fall through */ |
| case SIW_EPSTATE_AWAIT_MPAREP: |
| siw_cm_queue_work(cep, SIW_CM_WORK_READ_MPAHDR); |
| break; |
| |
| default: |
| siw_dbg_cep(cep, "unexpected data, state %d\n", cep->state); |
| break; |
| } |
| out: |
| read_unlock(&sk->sk_callback_lock); |
| } |
| |
| static void siw_cm_llp_write_space(struct sock *sk) |
| { |
| struct siw_cep *cep = sk_to_cep(sk); |
| |
| if (cep) |
| siw_dbg_cep(cep, "state: %d\n", cep->state); |
| } |
| |
| static void siw_cm_llp_error_report(struct sock *sk) |
| { |
| struct siw_cep *cep = sk_to_cep(sk); |
| |
| if (cep) { |
| siw_dbg_cep(cep, "error %d, socket state: %d, cep state: %d\n", |
| sk->sk_err, sk->sk_state, cep->state); |
| cep->sk_error_report(sk); |
| } |
| } |
| |
| static void siw_cm_llp_state_change(struct sock *sk) |
| { |
| struct siw_cep *cep; |
| void (*orig_state_change)(struct sock *s); |
| |
| read_lock(&sk->sk_callback_lock); |
| |
| cep = sk_to_cep(sk); |
| if (!cep) { |
| /* endpoint already disassociated */ |
| read_unlock(&sk->sk_callback_lock); |
| return; |
| } |
| orig_state_change = cep->sk_state_change; |
| |
| siw_dbg_cep(cep, "state: %d\n", cep->state); |
| |
| switch (sk->sk_state) { |
| case TCP_ESTABLISHED: |
| /* |
| * handle accepting socket as special case where only |
| * new connection is possible |
| */ |
| siw_cm_queue_work(cep, SIW_CM_WORK_ACCEPT); |
| break; |
| |
| case TCP_CLOSE: |
| case TCP_CLOSE_WAIT: |
| if (cep->qp) |
| cep->qp->tx_ctx.tx_suspend = 1; |
| siw_cm_queue_work(cep, SIW_CM_WORK_PEER_CLOSE); |
| break; |
| |
| default: |
| siw_dbg_cep(cep, "unexpected socket state %d\n", sk->sk_state); |
| } |
| read_unlock(&sk->sk_callback_lock); |
| orig_state_change(sk); |
| } |
| |
| static int kernel_bindconnect(struct socket *s, struct sockaddr *laddr, |
| struct sockaddr *raddr) |
| { |
| int rv, flags = 0, s_val = 1; |
| size_t size = laddr->sa_family == AF_INET ? |
| sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6); |
| |
| /* |
| * Make address available again asap. |
| */ |
| rv = kernel_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&s_val, |
| sizeof(s_val)); |
| if (rv < 0) |
| return rv; |
| |
| rv = s->ops->bind(s, laddr, size); |
| if (rv < 0) |
| return rv; |
| |
| rv = s->ops->connect(s, raddr, size, flags); |
| |
| return rv < 0 ? rv : 0; |
| } |
| |
| int siw_connect(struct iw_cm_id *id, struct iw_cm_conn_param *params) |
| { |
| struct siw_device *sdev = to_siw_dev(id->device); |
| struct siw_qp *qp; |
| struct siw_cep *cep = NULL; |
| struct socket *s = NULL; |
| struct sockaddr *laddr = (struct sockaddr *)&id->local_addr, |
| *raddr = (struct sockaddr *)&id->remote_addr; |
| bool p2p_mode = peer_to_peer, v4 = true; |
| u16 pd_len = params->private_data_len; |
| int version = mpa_version, rv; |
| |
| if (pd_len > MPA_MAX_PRIVDATA) |
| return -EINVAL; |
| |
| if (params->ird > sdev->attrs.max_ird || |
| params->ord > sdev->attrs.max_ord) |
| return -ENOMEM; |
| |
| if (laddr->sa_family == AF_INET6) |
| v4 = false; |
| else if (laddr->sa_family != AF_INET) |
| return -EAFNOSUPPORT; |
| |
| /* |
| * Respect any iwarp port mapping: Use mapped remote address |
| * if valid. Local address must not be mapped, since siw |
| * uses kernel TCP stack. |
| */ |
| if ((v4 && to_sockaddr_in(id->remote_addr).sin_port != 0) || |
| to_sockaddr_in6(id->remote_addr).sin6_port != 0) |
| raddr = (struct sockaddr *)&id->m_remote_addr; |
| |
| qp = siw_qp_id2obj(sdev, params->qpn); |
| if (!qp) { |
| WARN(1, "[QP %u] does not exist\n", params->qpn); |
| rv = -EINVAL; |
| goto error; |
| } |
| if (v4) |
| siw_dbg_qp(qp, |
| "pd_len %d, laddr %pI4 %d, raddr %pI4 %d\n", |
| pd_len, |
| &((struct sockaddr_in *)(laddr))->sin_addr, |
| ntohs(((struct sockaddr_in *)(laddr))->sin_port), |
| &((struct sockaddr_in *)(raddr))->sin_addr, |
| ntohs(((struct sockaddr_in *)(raddr))->sin_port)); |
| else |
| siw_dbg_qp(qp, |
| "pd_len %d, laddr %pI6 %d, raddr %pI6 %d\n", |
| pd_len, |
| &((struct sockaddr_in6 *)(laddr))->sin6_addr, |
| ntohs(((struct sockaddr_in6 *)(laddr))->sin6_port), |
| &((struct sockaddr_in6 *)(raddr))->sin6_addr, |
| ntohs(((struct sockaddr_in6 *)(raddr))->sin6_port)); |
| |
| rv = sock_create(v4 ? AF_INET : AF_INET6, SOCK_STREAM, IPPROTO_TCP, &s); |
| if (rv < 0) |
| goto error; |
| |
| /* |
| * NOTE: For simplification, connect() is called in blocking |
| * mode. Might be reconsidered for async connection setup at |
| * TCP level. |
| */ |
| rv = kernel_bindconnect(s, laddr, raddr); |
| if (rv != 0) { |
| siw_dbg_qp(qp, "kernel_bindconnect: error %d\n", rv); |
| goto error; |
| } |
| if (siw_tcp_nagle == false) { |
| int val = 1; |
| |
| rv = kernel_setsockopt(s, SOL_TCP, TCP_NODELAY, (char *)&val, |
| sizeof(val)); |
| if (rv) { |
| siw_dbg_qp(qp, "setsockopt NODELAY error: %d\n", rv); |
| goto error; |
| } |
| } |
| cep = siw_cep_alloc(sdev); |
| if (!cep) { |
| rv = -ENOMEM; |
| goto error; |
| } |
| siw_cep_set_inuse(cep); |
| |
| /* Associate QP with CEP */ |
| siw_cep_get(cep); |
| qp->cep = cep; |
| |
| /* siw_qp_get(qp) already done by QP lookup */ |
| cep->qp = qp; |
| |
| id->add_ref(id); |
| cep->cm_id = id; |
| |
| /* |
| * 4: Allocate a sufficient number of work elements |
| * to allow concurrent handling of local + peer close |
| * events, MPA header processing + MPA timeout. |
| */ |
| rv = siw_cm_alloc_work(cep, 4); |
| if (rv != 0) { |
| rv = -ENOMEM; |
| goto error; |
| } |
| cep->ird = params->ird; |
| cep->ord = params->ord; |
| |
| if (p2p_mode && cep->ord == 0) |
| cep->ord = 1; |
| |
| cep->state = SIW_EPSTATE_CONNECTING; |
| |
| /* |
| * Associate CEP with socket |
| */ |
| siw_cep_socket_assoc(cep, s); |
| |
| cep->state = SIW_EPSTATE_AWAIT_MPAREP; |
| |
| /* |
| * Set MPA Request bits: CRC if required, no MPA Markers, |
| * MPA Rev. according to module parameter 'mpa_version', Key 'Request'. |
| */ |
| cep->mpa.hdr.params.bits = 0; |
| if (version > MPA_REVISION_2) { |
| pr_warn("Setting MPA version to %u\n", MPA_REVISION_2); |
| version = MPA_REVISION_2; |
| /* Adjust also module parameter */ |
| mpa_version = MPA_REVISION_2; |
| } |
| __mpa_rr_set_revision(&cep->mpa.hdr.params.bits, version); |
| |
| if (try_gso) |
| cep->mpa.hdr.params.bits |= MPA_RR_FLAG_GSO_EXP; |
| |
| if (mpa_crc_required) |
| cep->mpa.hdr.params.bits |= MPA_RR_FLAG_CRC; |
| |
| /* |
| * If MPA version == 2: |
| * o Include ORD and IRD. |
| * o Indicate peer-to-peer mode, if required by module |
| * parameter 'peer_to_peer'. |
| */ |
| if (version == MPA_REVISION_2) { |
| cep->enhanced_rdma_conn_est = true; |
| cep->mpa.hdr.params.bits |= MPA_RR_FLAG_ENHANCED; |
| |
| cep->mpa.v2_ctrl.ird = htons(cep->ird); |
| cep->mpa.v2_ctrl.ord = htons(cep->ord); |
| |
| if (p2p_mode) { |
| cep->mpa.v2_ctrl.ird |= MPA_V2_PEER_TO_PEER; |
| cep->mpa.v2_ctrl.ord |= rtr_type; |
| } |
| /* Remember own P2P mode requested */ |
| cep->mpa.v2_ctrl_req.ird = cep->mpa.v2_ctrl.ird; |
| cep->mpa.v2_ctrl_req.ord = cep->mpa.v2_ctrl.ord; |
| } |
| memcpy(cep->mpa.hdr.key, MPA_KEY_REQ, 16); |
| |
| rv = siw_send_mpareqrep(cep, params->private_data, pd_len); |
| /* |
| * Reset private data. |
| */ |
| cep->mpa.hdr.params.pd_len = 0; |
| |
| if (rv >= 0) { |
| rv = siw_cm_queue_work(cep, SIW_CM_WORK_MPATIMEOUT); |
| if (!rv) { |
| siw_dbg_cep(cep, "[QP %u]: exit\n", qp_id(qp)); |
| siw_cep_set_free(cep); |
| return 0; |
| } |
| } |
| error: |
| siw_dbg(id->device, "failed: %d\n", rv); |
| |
| if (cep) { |
| siw_socket_disassoc(s); |
| sock_release(s); |
| cep->sock = NULL; |
| |
| cep->qp = NULL; |
| |
| cep->cm_id = NULL; |
| id->rem_ref(id); |
| siw_cep_put(cep); |
| |
| qp->cep = NULL; |
| siw_cep_put(cep); |
| |
| cep->state = SIW_EPSTATE_CLOSED; |
| |
| siw_cep_set_free(cep); |
| |
| siw_cep_put(cep); |
| |
| } else if (s) { |
| sock_release(s); |
| } |
| if (qp) |
| siw_qp_put(qp); |
| |
| return rv; |
| } |
| |
| /* |
| * siw_accept - Let SoftiWARP accept an RDMA connection request |
| * |
| * @id: New connection management id to be used for accepted |
| * connection request |
| * @params: Connection parameters provided by ULP for accepting connection |
| * |
| * Transition QP to RTS state, associate new CM id @id with accepted CEP |
| * and get prepared for TCP input by installing socket callbacks. |
| * Then send MPA Reply and generate the "connection established" event. |
| * Socket callbacks must be installed before sending MPA Reply, because |
| * the latter may cause a first RDMA message to arrive from the RDMA Initiator |
| * side very quickly, at which time the socket callbacks must be ready. |
| */ |
| int siw_accept(struct iw_cm_id *id, struct iw_cm_conn_param *params) |
| { |
| struct siw_device *sdev = to_siw_dev(id->device); |
| struct siw_cep *cep = (struct siw_cep *)id->provider_data; |
| struct siw_qp *qp; |
| struct siw_qp_attrs qp_attrs; |
| int rv, max_priv_data = MPA_MAX_PRIVDATA; |
| bool wait_for_peer_rts = false; |
| |
| siw_cep_set_inuse(cep); |
| siw_cep_put(cep); |
| |
| /* Free lingering inbound private data */ |
| if (cep->mpa.hdr.params.pd_len) { |
| cep->mpa.hdr.params.pd_len = 0; |
| kfree(cep->mpa.pdata); |
| cep->mpa.pdata = NULL; |
| } |
| siw_cancel_mpatimer(cep); |
| |
| if (cep->state != SIW_EPSTATE_RECVD_MPAREQ) { |
| siw_dbg_cep(cep, "out of state\n"); |
| |
| siw_cep_set_free(cep); |
| siw_cep_put(cep); |
| |
| return -ECONNRESET; |
| } |
| qp = siw_qp_id2obj(sdev, params->qpn); |
| if (!qp) { |
| WARN(1, "[QP %d] does not exist\n", params->qpn); |
| siw_cep_set_free(cep); |
| siw_cep_put(cep); |
| |
| return -EINVAL; |
| } |
| down_write(&qp->state_lock); |
| if (qp->attrs.state > SIW_QP_STATE_RTR) { |
| rv = -EINVAL; |
| up_write(&qp->state_lock); |
| goto error; |
| } |
| siw_dbg_cep(cep, "[QP %d]\n", params->qpn); |
| |
| if (try_gso && cep->mpa.hdr.params.bits & MPA_RR_FLAG_GSO_EXP) { |
| siw_dbg_cep(cep, "peer allows GSO on TX\n"); |
| qp->tx_ctx.gso_seg_limit = 0; |
| } |
| if (params->ord > sdev->attrs.max_ord || |
| params->ird > sdev->attrs.max_ird) { |
| siw_dbg_cep( |
| cep, |
| "[QP %u]: ord %d (max %d), ird %d (max %d)\n", |
| qp_id(qp), params->ord, sdev->attrs.max_ord, |
| params->ird, sdev->attrs.max_ird); |
| rv = -EINVAL; |
| up_write(&qp->state_lock); |
| goto error; |
| } |
| if (cep->enhanced_rdma_conn_est) |
| max_priv_data -= sizeof(struct mpa_v2_data); |
| |
| if (params->private_data_len > max_priv_data) { |
| siw_dbg_cep( |
| cep, |
| "[QP %u]: private data length: %d (max %d)\n", |
| qp_id(qp), params->private_data_len, max_priv_data); |
| rv = -EINVAL; |
| up_write(&qp->state_lock); |
| goto error; |
| } |
| if (cep->enhanced_rdma_conn_est) { |
| if (params->ord > cep->ord) { |
| if (relaxed_ird_negotiation) { |
| params->ord = cep->ord; |
| } else { |
| cep->ird = params->ird; |
| cep->ord = params->ord; |
| rv = -EINVAL; |
| up_write(&qp->state_lock); |
| goto error; |
| } |
| } |
| if (params->ird < cep->ird) { |
| if (relaxed_ird_negotiation && |
| cep->ird <= sdev->attrs.max_ird) |
| params->ird = cep->ird; |
| else { |
| rv = -ENOMEM; |
| up_write(&qp->state_lock); |
| goto error; |
| } |
| } |
| if (cep->mpa.v2_ctrl.ord & |
| (MPA_V2_RDMA_WRITE_RTR | MPA_V2_RDMA_READ_RTR)) |
| wait_for_peer_rts = true; |
| /* |
| * Signal back negotiated IRD and ORD values |
| */ |
| cep->mpa.v2_ctrl.ord = |
| htons(params->ord & MPA_IRD_ORD_MASK) | |
| (cep->mpa.v2_ctrl.ord & ~MPA_V2_MASK_IRD_ORD); |
| cep->mpa.v2_ctrl.ird = |
| htons(params->ird & MPA_IRD_ORD_MASK) | |
| (cep->mpa.v2_ctrl.ird & ~MPA_V2_MASK_IRD_ORD); |
| } |
| cep->ird = params->ird; |
| cep->ord = params->ord; |
| |
| cep->cm_id = id; |
| id->add_ref(id); |
| |
| memset(&qp_attrs, 0, sizeof(qp_attrs)); |
| qp_attrs.orq_size = cep->ord; |
| qp_attrs.irq_size = cep->ird; |
| qp_attrs.sk = cep->sock; |
| if (cep->mpa.hdr.params.bits & MPA_RR_FLAG_CRC) |
| qp_attrs.flags = SIW_MPA_CRC; |
| qp_attrs.state = SIW_QP_STATE_RTS; |
| |
| siw_dbg_cep(cep, "[QP%u]: moving to rts\n", qp_id(qp)); |
| |
| /* Associate QP with CEP */ |
| siw_cep_get(cep); |
| qp->cep = cep; |
| |
| /* siw_qp_get(qp) already done by QP lookup */ |
| cep->qp = qp; |
| |
| cep->state = SIW_EPSTATE_RDMA_MODE; |
| |
| /* Move socket RX/TX under QP control */ |
| rv = siw_qp_modify(qp, &qp_attrs, |
| SIW_QP_ATTR_STATE | SIW_QP_ATTR_LLP_HANDLE | |
| SIW_QP_ATTR_ORD | SIW_QP_ATTR_IRD | |
| SIW_QP_ATTR_MPA); |
| up_write(&qp->state_lock); |
| |
| if (rv) |
| goto error; |
| |
| siw_dbg_cep(cep, "[QP %u]: send mpa reply, %d byte pdata\n", |
| qp_id(qp), params->private_data_len); |
| |
| rv = siw_send_mpareqrep(cep, params->private_data, |
| params->private_data_len); |
| if (rv != 0) |
| goto error; |
| |
| if (wait_for_peer_rts) { |
| siw_sk_assign_rtr_upcalls(cep); |
| } else { |
| siw_qp_socket_assoc(cep, qp); |
| rv = siw_cm_upcall(cep, IW_CM_EVENT_ESTABLISHED, 0); |
| if (rv) |
| goto error; |
| } |
| siw_cep_set_free(cep); |
| |
| return 0; |
| error: |
| siw_socket_disassoc(cep->sock); |
| sock_release(cep->sock); |
| cep->sock = NULL; |
| |
| cep->state = SIW_EPSTATE_CLOSED; |
| |
| if (cep->cm_id) { |
| cep->cm_id->rem_ref(id); |
| cep->cm_id = NULL; |
| } |
| if (qp->cep) { |
| siw_cep_put(cep); |
| qp->cep = NULL; |
| } |
| cep->qp = NULL; |
| siw_qp_put(qp); |
| |
| siw_cep_set_free(cep); |
| siw_cep_put(cep); |
| |
| return rv; |
| } |
| |
| /* |
| * siw_reject() |
| * |
| * Local connection reject case. Send private data back to peer, |
| * close connection and dereference connection id. |
| */ |
| int siw_reject(struct iw_cm_id *id, const void *pdata, u8 pd_len) |
| { |
| struct siw_cep *cep = (struct siw_cep *)id->provider_data; |
| |
| siw_cep_set_inuse(cep); |
| siw_cep_put(cep); |
| |
| siw_cancel_mpatimer(cep); |
| |
| if (cep->state != SIW_EPSTATE_RECVD_MPAREQ) { |
| siw_dbg_cep(cep, "out of state\n"); |
| |
| siw_cep_set_free(cep); |
| siw_cep_put(cep); /* put last reference */ |
| |
| return -ECONNRESET; |
| } |
| siw_dbg_cep(cep, "cep->state %d, pd_len %d\n", cep->state, |
| pd_len); |
| |
| if (__mpa_rr_revision(cep->mpa.hdr.params.bits) >= MPA_REVISION_1) { |
| cep->mpa.hdr.params.bits |= MPA_RR_FLAG_REJECT; /* reject */ |
| siw_send_mpareqrep(cep, pdata, pd_len); |
| } |
| siw_socket_disassoc(cep->sock); |
| sock_release(cep->sock); |
| cep->sock = NULL; |
| |
| cep->state = SIW_EPSTATE_CLOSED; |
| |
| siw_cep_set_free(cep); |
| siw_cep_put(cep); |
| |
| return 0; |
| } |
| |
| static int siw_listen_address(struct iw_cm_id *id, int backlog, |
| struct sockaddr *laddr, int addr_family) |
| { |
| struct socket *s; |
| struct siw_cep *cep = NULL; |
| struct siw_device *sdev = to_siw_dev(id->device); |
| int rv = 0, s_val; |
| |
| rv = sock_create(addr_family, SOCK_STREAM, IPPROTO_TCP, &s); |
| if (rv < 0) |
| return rv; |
| |
| /* |
| * Allow binding local port when still in TIME_WAIT from last close. |
| */ |
| s_val = 1; |
| rv = kernel_setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&s_val, |
| sizeof(s_val)); |
| if (rv) { |
| siw_dbg(id->device, "setsockopt error: %d\n", rv); |
| goto error; |
| } |
| rv = s->ops->bind(s, laddr, addr_family == AF_INET ? |
| sizeof(struct sockaddr_in) : |
| sizeof(struct sockaddr_in6)); |
| if (rv) { |
| siw_dbg(id->device, "socket bind error: %d\n", rv); |
| goto error; |
| } |
| cep = siw_cep_alloc(sdev); |
| if (!cep) { |
| rv = -ENOMEM; |
| goto error; |
| } |
| siw_cep_socket_assoc(cep, s); |
| |
| rv = siw_cm_alloc_work(cep, backlog); |
| if (rv) { |
| siw_dbg(id->device, |
| "alloc_work error %d, backlog %d\n", |
| rv, backlog); |
| goto error; |
| } |
| rv = s->ops->listen(s, backlog); |
| if (rv) { |
| siw_dbg(id->device, "listen error %d\n", rv); |
| goto error; |
| } |
| cep->cm_id = id; |
| id->add_ref(id); |
| |
| /* |
| * In case of a wildcard rdma_listen on a multi-homed device, |
| * a listener's IWCM id is associated with more than one listening CEP. |
| * |
| * We currently use id->provider_data in three different ways: |
| * |
| * o For a listener's IWCM id, id->provider_data points to |
| * the list_head of the list of listening CEPs. |
| * Uses: siw_create_listen(), siw_destroy_listen() |
| * |
| * o For each accepted passive-side IWCM id, id->provider_data |
| * points to the CEP itself. This is a consequence of |
| * - siw_cm_upcall() setting event.provider_data = cep and |
| * - the IWCM's cm_conn_req_handler() setting provider_data of the |
| * new passive-side IWCM id equal to event.provider_data |
| * Uses: siw_accept(), siw_reject() |
| * |
| * o For an active-side IWCM id, id->provider_data is not used at all. |
| * |
| */ |
| if (!id->provider_data) { |
| id->provider_data = |
| kmalloc(sizeof(struct list_head), GFP_KERNEL); |
| if (!id->provider_data) { |
| rv = -ENOMEM; |
| goto error; |
| } |
| INIT_LIST_HEAD((struct list_head *)id->provider_data); |
| } |
| list_add_tail(&cep->listenq, (struct list_head *)id->provider_data); |
| cep->state = SIW_EPSTATE_LISTENING; |
| |
| if (addr_family == AF_INET) |
| siw_dbg(id->device, "Listen at laddr %pI4 %u\n", |
| &(((struct sockaddr_in *)laddr)->sin_addr), |
| ((struct sockaddr_in *)laddr)->sin_port); |
| else |
| siw_dbg(id->device, "Listen at laddr %pI6 %u\n", |
| &(((struct sockaddr_in6 *)laddr)->sin6_addr), |
| ((struct sockaddr_in6 *)laddr)->sin6_port); |
| |
| return 0; |
| |
| error: |
| siw_dbg(id->device, "failed: %d\n", rv); |
| |
| if (cep) { |
| siw_cep_set_inuse(cep); |
| |
| if (cep->cm_id) { |
| cep->cm_id->rem_ref(cep->cm_id); |
| cep->cm_id = NULL; |
| } |
| cep->sock = NULL; |
| siw_socket_disassoc(s); |
| cep->state = SIW_EPSTATE_CLOSED; |
| |
| siw_cep_set_free(cep); |
| siw_cep_put(cep); |
| } |
| sock_release(s); |
| |
| return rv; |
| } |
| |
| static void siw_drop_listeners(struct iw_cm_id *id) |
| { |
| struct list_head *p, *tmp; |
| |
| /* |
| * In case of a wildcard rdma_listen on a multi-homed device, |
| * a listener's IWCM id is associated with more than one listening CEP. |
| */ |
| list_for_each_safe(p, tmp, (struct list_head *)id->provider_data) { |
| struct siw_cep *cep = list_entry(p, struct siw_cep, listenq); |
| |
| list_del(p); |
| |
| siw_dbg_cep(cep, "drop cep, state %d\n", cep->state); |
| |
| siw_cep_set_inuse(cep); |
| |
| if (cep->cm_id) { |
| cep->cm_id->rem_ref(cep->cm_id); |
| cep->cm_id = NULL; |
| } |
| if (cep->sock) { |
| siw_socket_disassoc(cep->sock); |
| sock_release(cep->sock); |
| cep->sock = NULL; |
| } |
| cep->state = SIW_EPSTATE_CLOSED; |
| siw_cep_set_free(cep); |
| siw_cep_put(cep); |
| } |
| } |
| |
| /* |
| * siw_create_listen - Create resources for a listener's IWCM ID @id |
| * |
| * Listens on the socket addresses id->local_addr and id->remote_addr. |
| * |
| * If the listener's @id provides a specific local IP address, at most one |
| * listening socket is created and associated with @id. |
| * |
| * If the listener's @id provides the wildcard (zero) local IP address, |
| * a separate listen is performed for each local IP address of the device |
| * by creating a listening socket and binding to that local IP address. |
| * |
| */ |
| int siw_create_listen(struct iw_cm_id *id, int backlog) |
| { |
| struct net_device *dev = to_siw_dev(id->device)->netdev; |
| int rv = 0, listeners = 0; |
| |
| siw_dbg(id->device, "backlog %d\n", backlog); |
| |
| /* |
| * For each attached address of the interface, create a |
| * listening socket, if id->local_addr is the wildcard |
| * IP address or matches the IP address. |
| */ |
| if (id->local_addr.ss_family == AF_INET) { |
| struct in_device *in_dev = in_dev_get(dev); |
| struct sockaddr_in s_laddr, *s_raddr; |
| const struct in_ifaddr *ifa; |
| |
| if (!in_dev) { |
| rv = -ENODEV; |
| goto out; |
| } |
| memcpy(&s_laddr, &id->local_addr, sizeof(s_laddr)); |
| s_raddr = (struct sockaddr_in *)&id->remote_addr; |
| |
| siw_dbg(id->device, |
| "laddr %pI4:%d, raddr %pI4:%d\n", |
| &s_laddr.sin_addr, ntohs(s_laddr.sin_port), |
| &s_raddr->sin_addr, ntohs(s_raddr->sin_port)); |
| |
| rtnl_lock(); |
| in_dev_for_each_ifa_rtnl(ifa, in_dev) { |
| if (ipv4_is_zeronet(s_laddr.sin_addr.s_addr) || |
| s_laddr.sin_addr.s_addr == ifa->ifa_address) { |
| s_laddr.sin_addr.s_addr = ifa->ifa_address; |
| |
| rv = siw_listen_address(id, backlog, |
| (struct sockaddr *)&s_laddr, |
| AF_INET); |
| if (!rv) |
| listeners++; |
| } |
| } |
| rtnl_unlock(); |
| in_dev_put(in_dev); |
| } else if (id->local_addr.ss_family == AF_INET6) { |
| struct inet6_dev *in6_dev = in6_dev_get(dev); |
| struct inet6_ifaddr *ifp; |
| struct sockaddr_in6 *s_laddr = &to_sockaddr_in6(id->local_addr), |
| *s_raddr = &to_sockaddr_in6(id->remote_addr); |
| |
| if (!in6_dev) { |
| rv = -ENODEV; |
| goto out; |
| } |
| siw_dbg(id->device, |
| "laddr %pI6:%d, raddr %pI6:%d\n", |
| &s_laddr->sin6_addr, ntohs(s_laddr->sin6_port), |
| &s_raddr->sin6_addr, ntohs(s_raddr->sin6_port)); |
| |
| rtnl_lock(); |
| list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { |
| if (ifp->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED)) |
| continue; |
| if (ipv6_addr_any(&s_laddr->sin6_addr) || |
| ipv6_addr_equal(&s_laddr->sin6_addr, &ifp->addr)) { |
| struct sockaddr_in6 bind_addr = { |
| .sin6_family = AF_INET6, |
| .sin6_port = s_laddr->sin6_port, |
| .sin6_flowinfo = 0, |
| .sin6_addr = ifp->addr, |
| .sin6_scope_id = dev->ifindex }; |
| |
| rv = siw_listen_address(id, backlog, |
| (struct sockaddr *)&bind_addr, |
| AF_INET6); |
| if (!rv) |
| listeners++; |
| } |
| } |
| rtnl_unlock(); |
| in6_dev_put(in6_dev); |
| } else { |
| rv = -EAFNOSUPPORT; |
| } |
| out: |
| if (listeners) |
| rv = 0; |
| else if (!rv) |
| rv = -EINVAL; |
| |
| siw_dbg(id->device, "%s\n", rv ? "FAIL" : "OK"); |
| |
| return rv; |
| } |
| |
| int siw_destroy_listen(struct iw_cm_id *id) |
| { |
| if (!id->provider_data) { |
| siw_dbg(id->device, "no cep(s)\n"); |
| return 0; |
| } |
| siw_drop_listeners(id); |
| kfree(id->provider_data); |
| id->provider_data = NULL; |
| |
| return 0; |
| } |
| |
| int siw_cm_init(void) |
| { |
| /* |
| * create_single_workqueue for strict ordering |
| */ |
| siw_cm_wq = create_singlethread_workqueue("siw_cm_wq"); |
| if (!siw_cm_wq) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| void siw_cm_exit(void) |
| { |
| if (siw_cm_wq) { |
| flush_workqueue(siw_cm_wq); |
| destroy_workqueue(siw_cm_wq); |
| } |
| } |