diff options
Diffstat (limited to 'source4/cluster/ctdb/ib/ibwrapper.c')
| -rw-r--r-- | source4/cluster/ctdb/ib/ibwrapper.c | 1344 |
1 files changed, 1344 insertions, 0 deletions
diff --git a/source4/cluster/ctdb/ib/ibwrapper.c b/source4/cluster/ctdb/ib/ibwrapper.c new file mode 100644 index 0000000000..f7b233954d --- /dev/null +++ b/source4/cluster/ctdb/ib/ibwrapper.c @@ -0,0 +1,1344 @@ +/* + * Unix SMB/CIFS implementation. + * Wrap Infiniband calls. + * + * Copyright (C) Sven Oehme <oehmes@de.ibm.com> 2006 + * + * Major code contributions by Peter Somogyi <psomogyi@gamax.hu> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <errno.h> +#include <sys/types.h> +#include <netinet/in.h> +#include <sys/socket.h> +#include <netdb.h> +#include <arpa/inet.h> +#include <malloc.h> +#include <assert.h> +#include <unistd.h> + +#include "includes.h" +#include "lib/events/events.h" +#include "ibwrapper.h" + +#include <rdma/rdma_cma.h> +#include "infiniband/sa-kern-abi.h" + +#include "ibwrapper_internal.h" +#include "lib/util/dlinklist.h" + +#define IBW_LASTERR_BUFSIZE 512 +static char ibw_lasterr[IBW_LASTERR_BUFSIZE]; + +#define IBW_MAX_SEND_WR 256 +#define IBW_MAX_RECV_WR 1024 +#define IBW_RECV_BUFSIZE 256 +#define IBW_RECV_THRESHOLD (1 * 1024 * 1024) + +static void ibw_event_handler_verbs(struct event_context *ev, + struct fd_event *fde, uint16_t flags, void *private_data); +static int ibw_fill_cq(struct ibw_conn *conn); +static int ibw_wc_recv(struct ibw_conn *conn, struct ibv_wc *wc); +static int ibw_wc_send(struct ibw_conn *conn, struct ibv_wc *wc); +static int ibw_send_packet(struct ibw_conn *conn, void *buf, struct ibw_wr *p, uint32_t len); + +static void *ibw_alloc_mr(struct ibw_ctx_priv *pctx, struct ibw_conn_priv *pconn, + uint32_t n, struct ibv_mr **ppmr) +{ + void *buf; + + DEBUG(10, ("ibw_alloc_mr(cmid=%p, n=%u)\n", pconn->cm_id, n)); + buf = memalign(pctx->pagesize, n); + if (!buf) { + sprintf(ibw_lasterr, "couldn't allocate memory\n"); + return NULL; + } + + *ppmr = ibv_reg_mr(pconn->pd, buf, n, IBV_ACCESS_LOCAL_WRITE); + if (!*ppmr) { + sprintf(ibw_lasterr, "couldn't allocate mr\n"); + free(buf); + return NULL; + } + + return buf; +} + +static void ibw_free_mr(char **ppbuf, struct ibv_mr **ppmr) +{ + DEBUG(10, ("ibw_free_mr(%u %u)\n", (uint32_t)*ppbuf, (uint32_t)*ppmr)); + if (*ppmr!=NULL) { + ibv_dereg_mr(*ppmr); + *ppmr = NULL; + } + if (*ppbuf) { + free(*ppbuf); + *ppbuf = NULL; + } +} + +static int ibw_init_memory(struct ibw_conn *conn) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + struct ibw_opts *opts = &pctx->opts; + int i; + struct ibw_wr *p; + + DEBUG(10, ("ibw_init_memory(cmid: %p)\n", pconn->cm_id)); + pconn->buf_send = ibw_alloc_mr(pctx, pconn, + opts->max_send_wr * opts->recv_bufsize, &pconn->mr_send); + if (!pconn->buf_send) { + sprintf(ibw_lasterr, "couldn't allocate work send buf\n"); + return -1; + } + + pconn->buf_recv = ibw_alloc_mr(pctx, pconn, + opts->max_recv_wr * opts->recv_bufsize, &pconn->mr_recv); + if (!pconn->buf_recv) { + sprintf(ibw_lasterr, "couldn't allocate work recv buf\n"); + return -1; + } + + pconn->wr_index = talloc_size(pconn, opts->max_send_wr * sizeof(struct ibw_wr *)); + assert(pconn->wr_index!=NULL); + + for(i=0; i<opts->max_send_wr; i++) { + p = pconn->wr_index[i] = talloc_zero(pconn, struct ibw_wr); + p->buf = pconn->buf_send + (i * opts->recv_bufsize); + p->wr_id = i; + + DLIST_ADD(pconn->wr_list_avail, p); + } + + return 0; +} + +static int ibw_ctx_priv_destruct(struct ibw_ctx_priv *pctx) +{ + DEBUG(10, ("ibw_ctx_priv_destruct(%u)\n", (uint32_t)pctx)); + + /* destroy cm */ + if (pctx->cm_channel) { + rdma_destroy_event_channel(pctx->cm_channel); + pctx->cm_channel = NULL; + } + if (pctx->cm_channel_event) { + /* TODO: do we have to do this here? */ + talloc_free(pctx->cm_channel_event); + pctx->cm_channel_event = NULL; + } + if (pctx->cm_id) { + rdma_destroy_id(pctx->cm_id); + pctx->cm_id = NULL; + } + + return 0; +} + +static int ibw_ctx_destruct(struct ibw_ctx *ctx) +{ + DEBUG(10, ("ibw_ctx_destruct(%u)\n", (uint32_t)ctx)); + return 0; +} + +static int ibw_conn_priv_destruct(struct ibw_conn_priv *pconn) +{ + DEBUG(10, ("ibw_conn_priv_destruct(%p, cmid: %p)\n", + pconn, pconn->cm_id)); + + /* pconn->wr_index is freed by talloc */ + /* pconn->wr_index[i] are freed by talloc */ + + /* destroy verbs */ + if (pconn->cm_id!=NULL && pconn->cm_id->qp!=NULL) { + rdma_destroy_qp(pconn->cm_id); + pconn->cm_id->qp = NULL; + } + + if (pconn->cq!=NULL) { + ibv_destroy_cq(pconn->cq); + pconn->cq = NULL; + } + + if (pconn->verbs_channel!=NULL) { + ibv_destroy_comp_channel(pconn->verbs_channel); + pconn->verbs_channel = NULL; + } + + /* must be freed here because its order is important */ + if (pconn->verbs_channel_event) { + talloc_free(pconn->verbs_channel_event); + pconn->verbs_channel_event = NULL; + } + + /* free memory regions */ + ibw_free_mr(&pconn->buf_send, &pconn->mr_send); + ibw_free_mr(&pconn->buf_recv, &pconn->mr_recv); + + if (pconn->pd) { + ibv_dealloc_pd(pconn->pd); + pconn->pd = NULL; + DEBUG(10, ("pconn=%p pd deallocated\n", pconn)); + } + + if (pconn->cm_id) { + rdma_destroy_id(pconn->cm_id); + pconn->cm_id = NULL; + DEBUG(10, ("pconn=%p cm_id destroyed\n", pconn)); + } + + return 0; +} + +static int ibw_wr_destruct(struct ibw_wr *wr) +{ + if (wr->buf_large!=NULL) + ibw_free_mr(&wr->buf_large, &wr->mr_large); + return 0; +} + +static int ibw_conn_destruct(struct ibw_conn *conn) +{ + DEBUG(10, ("ibw_conn_destruct(%u)\n", (uint32_t)conn)); + + /* important here: ctx is a talloc _parent_ */ + DLIST_REMOVE(conn->ctx->conn_list, conn); + return 0; +} + +struct ibw_conn *ibw_conn_new(struct ibw_ctx *ctx, TALLOC_CTX *mem_ctx) +{ + struct ibw_conn *conn; + struct ibw_conn_priv *pconn; + + assert(ctx!=NULL); + + conn = talloc_zero(mem_ctx, struct ibw_conn); + assert(conn!=NULL); + talloc_set_destructor(conn, ibw_conn_destruct); + + pconn = talloc_zero(conn, struct ibw_conn_priv); + assert(pconn!=NULL); + talloc_set_destructor(pconn, ibw_conn_priv_destruct); + + conn->ctx = ctx; + conn->internal = (void *)pconn; + + DLIST_ADD(ctx->conn_list, conn); + + return conn; +} + +static int ibw_setup_cq_qp(struct ibw_conn *conn) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + struct ibv_qp_init_attr init_attr; + struct ibv_qp_attr attr; + int rc; + + DEBUG(10, ("ibw_setup_cq_qp(cmid: %p)\n", pconn->cm_id)); + + /* init verbs */ + pconn->verbs_channel = ibv_create_comp_channel(pconn->cm_id->verbs); + if (!pconn->verbs_channel) { + sprintf(ibw_lasterr, "ibv_create_comp_channel failed %d\n", errno); + return -1; + } + DEBUG(10, ("created channel %p\n", pconn->verbs_channel)); + + pconn->verbs_channel_event = event_add_fd(pctx->ectx, NULL, /* not pconn or conn */ + pconn->verbs_channel->fd, EVENT_FD_READ, ibw_event_handler_verbs, conn); + + pconn->pd = ibv_alloc_pd(pconn->cm_id->verbs); + if (!pconn->pd) { + sprintf(ibw_lasterr, "ibv_alloc_pd failed %d\n", errno); + return -1; + } + DEBUG(10, ("created pd %p\n", pconn->pd)); + + /* init mr */ + if (ibw_init_memory(conn)) + return -1; + + /* init cq */ + pconn->cq = ibv_create_cq(pconn->cm_id->verbs, + pctx->opts.max_recv_wr + pctx->opts.max_send_wr, + conn, pconn->verbs_channel, 0); + if (pconn->cq==NULL) { + sprintf(ibw_lasterr, "ibv_create_cq failed\n"); + return -1; + } + + rc = ibv_req_notify_cq(pconn->cq, 0); + if (rc) { + sprintf(ibw_lasterr, "ibv_req_notify_cq failed with %d\n", rc); + return rc; + } + + /* init qp */ + memset(&init_attr, 0, sizeof(init_attr)); + init_attr.cap.max_send_wr = pctx->opts.max_send_wr; + init_attr.cap.max_recv_wr = pctx->opts.max_recv_wr; + init_attr.cap.max_recv_sge = 1; + init_attr.cap.max_send_sge = 1; + init_attr.qp_type = IBV_QPT_RC; + init_attr.send_cq = pconn->cq; + init_attr.recv_cq = pconn->cq; + + rc = rdma_create_qp(pconn->cm_id, pconn->pd, &init_attr); + if (rc) { + sprintf(ibw_lasterr, "rdma_create_qp failed with %d\n", rc); + return rc; + } + /* elase result is in pconn->cm_id->qp */ + + rc = ibv_query_qp(pconn->cm_id->qp, &attr, IBV_QP_PATH_MTU, &init_attr); + if (rc) { + sprintf(ibw_lasterr, "ibv_query_qp failed with %d\n", rc); + return rc; + } + + return ibw_fill_cq(conn); +} + +static int ibw_refill_cq_recv(struct ibw_conn *conn) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + int rc; + struct ibv_sge list = { + .addr = (uintptr_t) NULL, /* filled below */ + .length = pctx->opts.recv_bufsize, + .lkey = pconn->mr_recv->lkey /* always the same */ + }; + struct ibv_recv_wr wr = { + .wr_id = 0, /* filled below */ + .sg_list = &list, + .num_sge = 1, + }; + struct ibv_recv_wr *bad_wr; + + DEBUG(10, ("ibw_refill_cq_recv(cmid: %p)\n", pconn->cm_id)); + + list.addr = (uintptr_t) pconn->buf_recv + pctx->opts.recv_bufsize * pconn->recv_index; + wr.wr_id = pconn->recv_index; + pconn->recv_index = (pconn->recv_index + 1) % pctx->opts.max_recv_wr; + + rc = ibv_post_recv(pconn->cm_id->qp, &wr, &bad_wr); + if (rc) { + sprintf(ibw_lasterr, "refill/ibv_post_recv failed with %d\n", rc); + DEBUG(0, (ibw_lasterr)); + return -2; + } + + return 0; +} + +static int ibw_fill_cq(struct ibw_conn *conn) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + int i, rc; + struct ibv_sge list = { + .addr = (uintptr_t) NULL, /* filled below */ + .length = pctx->opts.recv_bufsize, + .lkey = pconn->mr_recv->lkey /* always the same */ + }; + struct ibv_recv_wr wr = { + .wr_id = 0, /* filled below */ + .sg_list = &list, + .num_sge = 1, + }; + struct ibv_recv_wr *bad_wr; + + DEBUG(10, ("ibw_fill_cq(cmid: %p)\n", pconn->cm_id)); + + for(i = pctx->opts.max_recv_wr; i!=0; i--) { + list.addr = (uintptr_t) pconn->buf_recv + pctx->opts.recv_bufsize * pconn->recv_index; + wr.wr_id = pconn->recv_index; + pconn->recv_index = (pconn->recv_index + 1) % pctx->opts.max_recv_wr; + + rc = ibv_post_recv(pconn->cm_id->qp, &wr, &bad_wr); + if (rc) { + sprintf(ibw_lasterr, "fill/ibv_post_recv failed with %d\n", rc); + DEBUG(0, (ibw_lasterr)); + return -2; + } + } + + return 0; +} + +static int ibw_manage_connect(struct ibw_conn *conn) +{ + struct rdma_conn_param conn_param; + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + int rc; + + DEBUG(10, ("ibw_manage_connect(cmid: %p)\n", pconn->cm_id)); + + if (ibw_setup_cq_qp(conn)) + return -1; + + /* cm connect */ + memset(&conn_param, 0, sizeof conn_param); + conn_param.responder_resources = 1; + conn_param.initiator_depth = 1; + conn_param.retry_count = 10; + + rc = rdma_connect(pconn->cm_id, &conn_param); + if (rc) + sprintf(ibw_lasterr, "rdma_connect error %d\n", rc); + + return rc; +} + +static void ibw_event_handler_cm(struct event_context *ev, + struct fd_event *fde, uint16_t flags, void *private_data) +{ + int rc; + struct ibw_ctx *ctx = talloc_get_type(private_data, struct ibw_ctx); + struct ibw_ctx_priv *pctx = talloc_get_type(ctx->internal, struct ibw_ctx_priv); + struct ibw_conn *conn = NULL; + struct ibw_conn_priv *pconn = NULL; + struct rdma_cm_id *cma_id = NULL; + struct rdma_cm_event *event = NULL; + + assert(ctx!=NULL); + + rc = rdma_get_cm_event(pctx->cm_channel, &event); + if (rc) { + ctx->state = IBWS_ERROR; + sprintf(ibw_lasterr, "rdma_get_cm_event error %d\n", rc); + goto error; + } + cma_id = event->id; + + DEBUG(10, ("cma_event type %d cma_id %p (%s)\n", event->event, cma_id, + (cma_id == pctx->cm_id) ? "parent" : "child")); + + switch (event->event) { + case RDMA_CM_EVENT_ADDR_RESOLVED: + DEBUG(11, ("RDMA_CM_EVENT_ADDR_RESOLVED\n")); + /* continuing from ibw_connect ... */ + rc = rdma_resolve_route(cma_id, 2000); + if (rc) { + sprintf(ibw_lasterr, "rdma_resolve_route error %d\n", rc); + goto error; + } + /* continued at RDMA_CM_EVENT_ROUTE_RESOLVED */ + break; + + case RDMA_CM_EVENT_ROUTE_RESOLVED: + DEBUG(11, ("RDMA_CM_EVENT_ROUTE_RESOLVED\n")); + /* after RDMA_CM_EVENT_ADDR_RESOLVED: */ + assert(cma_id->context!=NULL); + conn = talloc_get_type(cma_id->context, struct ibw_conn); + + rc = ibw_manage_connect(conn); + if (rc) + goto error; + + break; + + case RDMA_CM_EVENT_CONNECT_REQUEST: + DEBUG(11, ("RDMA_CM_EVENT_CONNECT_REQUEST\n")); + ctx->state = IBWS_CONNECT_REQUEST; + conn = ibw_conn_new(ctx, ctx); + pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + pconn->cm_id = cma_id; /* !!! event will be freed but id not */ + cma_id->context = (void *)conn; + DEBUG(10, ("pconn->cm_id %p\n", pconn->cm_id)); + + if (ibw_setup_cq_qp(conn)) + goto error; + + conn->state = IBWC_INIT; + pctx->connstate_func(ctx, conn); + + /* continued at ibw_accept when invoked by the func above */ + if (!pconn->is_accepted) { + rc = rdma_reject(cma_id, NULL, 0); + if (rc) + DEBUG(0, ("rdma_reject failed with rc=%d\n", rc)); + talloc_free(conn); + DEBUG(10, ("pconn->cm_id %p wasn't accepted\n", pconn->cm_id)); + } + + /* TODO: clarify whether if it's needed by upper layer: */ + ctx->state = IBWS_READY; + pctx->connstate_func(ctx, NULL); + + /* NOTE: more requests can arrive until RDMA_CM_EVENT_ESTABLISHED ! */ + break; + + case RDMA_CM_EVENT_ESTABLISHED: + /* expected after ibw_accept and ibw_connect[not directly] */ + DEBUG(0, ("ESTABLISHED (conn: %p)\n", cma_id->context)); + conn = talloc_get_type(cma_id->context, struct ibw_conn); + assert(conn!=NULL); /* important assumption */ + + DEBUG(10, ("ibw_setup_cq_qp succeeded (cmid=%p)\n", cma_id)); + + /* client conn is up */ + conn->state = IBWC_CONNECTED; + + /* both ctx and conn have changed */ + pctx->connstate_func(ctx, conn); + break; + + case RDMA_CM_EVENT_ADDR_ERROR: + sprintf(ibw_lasterr, "RDMA_CM_EVENT_ADDR_ERROR, error %d\n", event->status); + case RDMA_CM_EVENT_ROUTE_ERROR: + sprintf(ibw_lasterr, "RDMA_CM_EVENT_ROUTE_ERROR, error %d\n", event->status); + case RDMA_CM_EVENT_CONNECT_ERROR: + sprintf(ibw_lasterr, "RDMA_CM_EVENT_CONNECT_ERROR, error %d\n", event->status); + case RDMA_CM_EVENT_UNREACHABLE: + sprintf(ibw_lasterr, "RDMA_CM_EVENT_UNREACHABLE, error %d\n", event->status); + case RDMA_CM_EVENT_REJECTED: + sprintf(ibw_lasterr, "RDMA_CM_EVENT_REJECTED, error %d\n", event->status); + conn = talloc_get_type(cma_id->context, struct ibw_conn); + if (conn) { + if ((rc=rdma_ack_cm_event(event))) + DEBUG(0, ("reject/rdma_ack_cm_event failed with %d\n", rc)); + event = NULL; + pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + ibw_conn_priv_destruct(pconn); + } + goto error; + + case RDMA_CM_EVENT_DISCONNECTED: + DEBUG(11, ("RDMA_CM_EVENT_DISCONNECTED\n")); + if ((rc=rdma_ack_cm_event(event))) + DEBUG(0, ("disc/rdma_ack_cm_event failed with %d\n", rc)); + event = NULL; /* don't ack more */ + + if (cma_id!=pctx->cm_id) { + DEBUG(0, ("client DISCONNECT event cm_id=%p\n", cma_id)); + conn = talloc_get_type(cma_id->context, struct ibw_conn); + conn->state = IBWC_DISCONNECTED; + pctx->connstate_func(NULL, conn); + } + break; + + case RDMA_CM_EVENT_DEVICE_REMOVAL: + sprintf(ibw_lasterr, "cma detected device removal!\n"); + goto error; + + default: + sprintf(ibw_lasterr, "unknown event %d\n", event->event); + goto error; + } + + if (event!=NULL && (rc=rdma_ack_cm_event(event))) { + sprintf(ibw_lasterr, "rdma_ack_cm_event failed with %d\n", rc); + goto error; + } + + return; +error: + if (event!=NULL && (rc=rdma_ack_cm_event(event))) { + sprintf(ibw_lasterr, "rdma_ack_cm_event failed with %d\n", rc); + goto error; + } + + DEBUG(0, ("cm event handler: %s", ibw_lasterr)); + + if (cma_id!=pctx->cm_id) { + conn = talloc_get_type(cma_id->context, struct ibw_conn); + if (conn) + conn->state = IBWC_ERROR; + pctx->connstate_func(NULL, conn); + } else { + ctx->state = IBWS_ERROR; + pctx->connstate_func(ctx, NULL); + } +} + +static void ibw_event_handler_verbs(struct event_context *ev, + struct fd_event *fde, uint16_t flags, void *private_data) +{ + struct ibw_conn *conn = talloc_get_type(private_data, struct ibw_conn); + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + + struct ibv_wc wc; + int rc; + struct ibv_cq *ev_cq; + void *ev_ctx; + + DEBUG(10, ("ibw_event_handler_verbs(%u)\n", (uint32_t)flags)); + + /* TODO: check whether if it's good to have more channels here... */ + rc = ibv_get_cq_event(pconn->verbs_channel, &ev_cq, &ev_ctx); + if (rc) { + sprintf(ibw_lasterr, "Failed to get cq_event with %d\n", rc); + goto error; + } + if (ev_cq != pconn->cq) { + sprintf(ibw_lasterr, "ev_cq(%p) != pconn->cq(%p)\n", ev_cq, pconn->cq); + goto error; + } + rc = ibv_req_notify_cq(pconn->cq, 0); + if (rc) { + sprintf(ibw_lasterr, "Couldn't request CQ notification (%d)\n", rc); + goto error; + } + + while((rc=ibv_poll_cq(pconn->cq, 1, &wc))==1) { + if (wc.status) { + sprintf(ibw_lasterr, "cq completion failed status=%d, opcode=%d, rc=%d\n", + wc.status, wc.opcode, rc); + goto error; + } + + switch(wc.opcode) { + case IBV_WC_SEND: + DEBUG(10, ("send completion\n")); + if (ibw_wc_send(conn, &wc)) + goto error; + break; + + case IBV_WC_RDMA_WRITE: + DEBUG(10, ("rdma write completion\n")); + break; + + case IBV_WC_RDMA_READ: + DEBUG(10, ("rdma read completion\n")); + break; + + case IBV_WC_RECV: + DEBUG(10, ("recv completion\n")); + if (ibw_wc_recv(conn, &wc)) + goto error; + break; + + default: + sprintf(ibw_lasterr, "unknown completion %d\n", wc.opcode); + goto error; + } + } + if (rc!=0) { + sprintf(ibw_lasterr, "ibv_poll_cq error %d\n", rc); + goto error; + } + + ibv_ack_cq_events(pconn->cq, 1); + + return; +error: + ibv_ack_cq_events(pconn->cq, 1); + + DEBUG(0, (ibw_lasterr)); + + if (conn->state!=IBWC_ERROR) { + conn->state = IBWC_ERROR; + pctx->connstate_func(NULL, conn); + } +} + +static int ibw_process_queue(struct ibw_conn *conn) +{ + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + struct ibw_ctx_priv *pctx; + struct ibw_wr *p; + int rc; + uint32_t msg_size; + + if (pconn->queue==NULL) + return 0; /* NOP */ + + p = pconn->queue; + + /* we must have at least 1 fragment to send */ + assert(p->queued_ref_cnt>0); + p->queued_ref_cnt--; + + pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + msg_size = (p->queued_ref_cnt) ? pctx->opts.recv_bufsize : p->queued_rlen; + + assert(p->queued_msg!=NULL); + assert(msg_size!=0); + + DEBUG(10, ("ibw_process_queue refcnt=%d msgsize=%u\n", + p->queued_ref_cnt, msg_size)); + + rc = ibw_send_packet(conn, p->queued_msg, p, msg_size); + + /* was this the last fragment? */ + if (p->queued_ref_cnt) { + p->queued_msg += pctx->opts.recv_bufsize; + } else { + DLIST_REMOVE2(pconn->queue, p, qprev, qnext); + p->queued_msg = NULL; + } + + return rc; +} + +static int ibw_wc_send(struct ibw_conn *conn, struct ibv_wc *wc) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + struct ibw_wr *p; + int send_index; + + DEBUG(10, ("ibw_wc_send(cmid: %p, wr_id: %u, bl: %u)\n", + pconn->cm_id, (uint32_t)wc->wr_id, (uint32_t)wc->byte_len)); + + assert(pconn->cm_id->qp->qp_num==wc->qp_num); + assert(wc->wr_id >= pctx->opts.max_recv_wr); + send_index = wc->wr_id - pctx->opts.max_recv_wr; + pconn->wr_sent--; + + if (send_index < pctx->opts.max_send_wr) { + DEBUG(10, ("ibw_wc_send#1 %u\n", (int)wc->wr_id)); + p = pconn->wr_index[send_index]; + if (p->buf_large!=NULL) { + if (p->ref_cnt) { + /* awaiting more of it... */ + p->ref_cnt--; + } else { + ibw_free_mr(&p->buf_large, &p->mr_large); + DLIST_REMOVE(pconn->wr_list_used, p); + DLIST_ADD(pconn->wr_list_avail, p); + } + } else { /* nasty - but necessary */ + DLIST_REMOVE(pconn->wr_list_used, p); + DLIST_ADD(pconn->wr_list_avail, p); + } + } else { /* "extra" request - not optimized */ + DEBUG(10, ("ibw_wc_send#2 %u\n", (int)wc->wr_id)); + for(p=pconn->extra_sent; p!=NULL; p=p->next) + if ((p->wr_id + pctx->opts.max_recv_wr)==(int)wc->wr_id) + break; + if (p==NULL) { + sprintf(ibw_lasterr, "failed to find wr_id %d\n", (int)wc->wr_id); + return -1; + } + if (p->ref_cnt) { + p->ref_cnt--; + } else { + ibw_free_mr(&p->buf_large, &p->mr_large); + DLIST_REMOVE(pconn->extra_sent, p); + DLIST_ADD(pconn->extra_avail, p); + } + } + + return ibw_process_queue(conn); +} + +static int ibw_append_to_part(struct ibw_conn_priv *pconn, + struct ibw_part *part, char **pp, uint32_t add_len, int info) +{ + DEBUG(10, ("ibw_append_to_part: cmid=%p, (bs=%u, len=%u, tr=%u), al=%u, i=%u\n", + pconn->cm_id, part->bufsize, part->len, part->to_read, add_len, info)); + + /* allocate more if necessary - it's an "evergrowing" buffer... */ + if (part->len + add_len > part->bufsize) { + if (part->buf==NULL) { + assert(part->len==0); + part->buf = talloc_size(pconn, add_len); + if (part->buf==NULL) { + sprintf(ibw_lasterr, "recv talloc_size error (%u) #%d\n", + add_len, info); + return -1; + } + part->bufsize = add_len; + } else { + part->buf = talloc_realloc_size(pconn, + part->buf, part->len + add_len); + if (part->buf==NULL) { + sprintf(ibw_lasterr, "recv realloc error (%u + %u) #%d\n", + part->len, add_len, info); + return -1; + } + } + part->bufsize = part->len + add_len; + } + + /* consume pp */ + memcpy(part->buf + part->len, *pp, add_len); + *pp += add_len; + part->len += add_len; + part->to_read -= add_len; + + return 0; +} + +static int ibw_wc_mem_threshold(struct ibw_conn_priv *pconn, + struct ibw_part *part, uint32_t threshold) +{ + DEBUG(10, ("ibw_wc_mem_threshold: cmid=%p, (bs=%u, len=%u, tr=%u), thr=%u\n", + pconn->cm_id, part->bufsize, part->len, part->to_read, threshold)); + + if (part->bufsize > threshold) { + DEBUG(3, ("ibw_wc_mem_threshold: cmid=%p, %u > %u\n", + pconn->cm_id, part->bufsize, threshold)); + talloc_free(part->buf); + part->buf = talloc_size(pconn, threshold); + if (part->buf==NULL) { + sprintf(ibw_lasterr, "talloc_size failed\n"); + return -1; + } + part->bufsize = threshold; + } + return 0; +} + +static int ibw_wc_recv(struct ibw_conn *conn, struct ibv_wc *wc) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + struct ibw_part *part = &pconn->part; + char *p; + uint32_t remain = wc->byte_len; + + DEBUG(10, ("ibw_wc_recv: cmid=%p, wr_id: %u, bl: %u\n", + pconn->cm_id, (uint32_t)wc->wr_id, remain)); + + assert(pconn->cm_id->qp->qp_num==wc->qp_num); + assert((int)wc->wr_id < pctx->opts.max_recv_wr); + assert(wc->byte_len <= pctx->opts.recv_bufsize); + + p = pconn->buf_recv + ((int)wc->wr_id * pctx->opts.recv_bufsize); + + while(remain) { + /* here always true: (part->len!=0 && part->to_read!=0) || + (part->len==0 && part->to_read==0) */ + if (part->len) { /* is there a partial msg to be continued? */ + int read_len = (part->to_read<=remain) ? part->to_read : remain; + if (ibw_append_to_part(pconn, part, &p, read_len, 421)) + goto error; + remain -= read_len; + + if (part->len<=sizeof(uint32_t) && part->to_read==0) { + assert(part->len==sizeof(uint32_t)); + /* set it again now... */ + part->to_read = *((uint32_t *)(part->buf)); /* TODO: ntohl */ + if (part->to_read<sizeof(uint32_t)) { + sprintf(ibw_lasterr, "got msglen=%u #2\n", part->to_read); + goto error; + } + part->to_read -= sizeof(uint32_t); /* it's already read */ + } + + if (part->to_read==0) { + pctx->receive_func(conn, part->buf, part->len); + part->len = 0; /* tells not having partial data (any more) */ + if (ibw_wc_mem_threshold(pconn, part, pctx->opts.recv_threshold)) + goto error; + } + } else { + if (remain>=sizeof(uint32_t)) { + uint32_t msglen = *(uint32_t *)p; /* TODO: ntohl */ + if (msglen<sizeof(uint32_t)) { + sprintf(ibw_lasterr, "got msglen=%u\n", msglen); + goto error; + } + + /* mostly awaited case: */ + if (msglen<=remain) { + pctx->receive_func(conn, p, msglen); + p += msglen; + remain -= msglen; + } else { + part->to_read = msglen; + /* part->len is already 0 */ + if (ibw_append_to_part(pconn, part, &p, remain, 422)) + goto error; + remain = 0; /* to be continued ... */ + /* part->to_read > 0 here */ + } + } else { /* edge case: */ + part->to_read = sizeof(uint32_t); + /* part->len is already 0 */ + if (ibw_append_to_part(pconn, part, &p, remain, 423)) + goto error; + remain = 0; + /* part->to_read > 0 here */ + } + } + } /* <remain> is always decreased at least by 1 */ + + if (ibw_refill_cq_recv(conn)) + goto error; + + return 0; + +error: + DEBUG(0, ("ibw_wc_recv error: %s", ibw_lasterr)); + return -1; +} + +static int ibw_process_init_attrs(struct ibw_initattr *attr, int nattr, struct ibw_opts *opts) +{ + int i; + const char *name, *value; + + DEBUG(10, ("ibw_process_init_attrs: nattr: %d\n", nattr)); + + opts->max_send_wr = IBW_MAX_SEND_WR; + opts->max_recv_wr = IBW_MAX_RECV_WR; + opts->recv_bufsize = IBW_RECV_BUFSIZE; + opts->recv_threshold = IBW_RECV_THRESHOLD; + + for(i=0; i<nattr; i++) { + name = attr[i].name; + value = attr[i].value; + + assert(name!=NULL && value!=NULL); + if (strcmp(name, "max_send_wr")==0) + opts->max_send_wr = atoi(value); + else if (strcmp(name, "max_recv_wr")==0) + opts->max_recv_wr = atoi(value); + else if (strcmp(name, "recv_bufsize")==0) + opts->recv_bufsize = atoi(value); + else if (strcmp(name, "recv_threshold")==0) + opts->recv_threshold = atoi(value); + else { + sprintf(ibw_lasterr, "ibw_init: unknown name %s\n", name); + return -1; + } + } + return 0; +} + +struct ibw_ctx *ibw_init(struct ibw_initattr *attr, int nattr, + void *ctx_userdata, + ibw_connstate_fn_t ibw_connstate, + ibw_receive_fn_t ibw_receive, + struct event_context *ectx) +{ + struct ibw_ctx *ctx = talloc_zero(NULL, struct ibw_ctx); + struct ibw_ctx_priv *pctx; + int rc; + + DEBUG(10, ("ibw_init(ctx_userdata: %p, ectx: %p)\n", ctx_userdata, ectx)); + + /* initialize basic data structures */ + memset(ibw_lasterr, 0, IBW_LASTERR_BUFSIZE); + + assert(ctx!=NULL); + ibw_lasterr[0] = '\0'; + talloc_set_destructor(ctx, ibw_ctx_destruct); + ctx->ctx_userdata = ctx_userdata; + + pctx = talloc_zero(ctx, struct ibw_ctx_priv); + talloc_set_destructor(pctx, ibw_ctx_priv_destruct); + ctx->internal = (void *)pctx; + assert(pctx!=NULL); + + pctx->connstate_func = ibw_connstate; + pctx->receive_func = ibw_receive; + + pctx->ectx = ectx; + + /* process attributes */ + if (ibw_process_init_attrs(attr, nattr, &pctx->opts)) + goto cleanup; + + /* init cm */ + pctx->cm_channel = rdma_create_event_channel(); + if (!pctx->cm_channel) { + sprintf(ibw_lasterr, "rdma_create_event_channel error %d\n", errno); + goto cleanup; + } + + pctx->cm_channel_event = event_add_fd(pctx->ectx, pctx, + pctx->cm_channel->fd, EVENT_FD_READ, ibw_event_handler_cm, ctx); + + rc = rdma_create_id(pctx->cm_channel, &pctx->cm_id, ctx, RDMA_PS_TCP); + if (rc) { + rc = errno; + sprintf(ibw_lasterr, "rdma_create_id error %d\n", rc); + goto cleanup; + } + DEBUG(10, ("created cm_id %p\n", pctx->cm_id)); + + pctx->pagesize = sysconf(_SC_PAGESIZE); + + return ctx; + /* don't put code here */ +cleanup: + DEBUG(0, (ibw_lasterr)); + + if (ctx) + talloc_free(ctx); + + return NULL; +} + +int ibw_stop(struct ibw_ctx *ctx) +{ + struct ibw_ctx_priv *pctx = (struct ibw_ctx_priv *)ctx->internal; + struct ibw_conn *p; + + DEBUG(10, ("ibw_stop\n")); + + for(p=ctx->conn_list; p!=NULL; p=p->next) { + if (ctx->state==IBWC_ERROR || ctx->state==IBWC_CONNECTED) { + if (ibw_disconnect(p)) + return -1; + } + } + + ctx->state = IBWS_STOPPED; + pctx->connstate_func(ctx, NULL); + + return 0; +} + +int ibw_bind(struct ibw_ctx *ctx, struct sockaddr_in *my_addr) +{ + struct ibw_ctx_priv *pctx = (struct ibw_ctx_priv *)ctx->internal; + int rc; + + DEBUG(10, ("ibw_bind: addr=%s, port=%u\n", + inet_ntoa(my_addr->sin_addr), ntohs(my_addr->sin_port))); + rc = rdma_bind_addr(pctx->cm_id, (struct sockaddr *) my_addr); + if (rc) { + sprintf(ibw_lasterr, "rdma_bind_addr error %d\n", rc); + DEBUG(0, (ibw_lasterr)); + return rc; + } + DEBUG(10, ("rdma_bind_addr successful\n")); + + return 0; +} + +int ibw_listen(struct ibw_ctx *ctx, int backlog) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(ctx->internal, struct ibw_ctx_priv); + int rc; + + DEBUG(10, ("ibw_listen\n")); + rc = rdma_listen(pctx->cm_id, backlog); + if (rc) { + sprintf(ibw_lasterr, "rdma_listen failed: %d\n", rc); + DEBUG(0, (ibw_lasterr)); + return rc; + } + + return 0; +} + +int ibw_accept(struct ibw_ctx *ctx, struct ibw_conn *conn, void *conn_userdata) +{ + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + struct rdma_conn_param conn_param; + int rc; + + DEBUG(10, ("ibw_accept: cmid=%p\n", pconn->cm_id)); + conn->conn_userdata = conn_userdata; + + memset(&conn_param, 0, sizeof(struct rdma_conn_param)); + conn_param.responder_resources = 1; + conn_param.initiator_depth = 1; + rc = rdma_accept(pconn->cm_id, &conn_param); + if (rc) { + sprintf(ibw_lasterr, "rdma_accept failed %d\n", rc); + DEBUG(0, (ibw_lasterr)); + return -1;; + } + + pconn->is_accepted = 1; + + /* continued at RDMA_CM_EVENT_ESTABLISHED */ + + return 0; +} + +int ibw_connect(struct ibw_conn *conn, struct sockaddr_in *serv_addr, void *conn_userdata) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_conn_priv *pconn = NULL; + int rc; + + assert(conn!=NULL); + + conn->conn_userdata = conn_userdata; + pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + DEBUG(10, ("ibw_connect: addr=%s, port=%u\n", inet_ntoa(serv_addr->sin_addr), + ntohs(serv_addr->sin_port))); + + /* clean previous - probably half - initialization */ + if (ibw_conn_priv_destruct(pconn)) { + DEBUG(0, ("ibw_connect/ibw_pconn_destruct failed for cm_id=%p\n", pconn->cm_id)); + return -1; + } + + /* init cm */ + rc = rdma_create_id(pctx->cm_channel, &pconn->cm_id, conn, RDMA_PS_TCP); + if (rc) { + rc = errno; + sprintf(ibw_lasterr, "ibw_connect/rdma_create_id error %d\n", rc); + talloc_free(conn); + return -1; + } + DEBUG(10, ("ibw_connect: rdma_create_id succeeded, cm_id=%p\n", pconn->cm_id)); + + rc = rdma_resolve_addr(pconn->cm_id, NULL, (struct sockaddr *) serv_addr, 2000); + if (rc) { + sprintf(ibw_lasterr, "rdma_resolve_addr error %d\n", rc); + DEBUG(0, (ibw_lasterr)); + talloc_free(conn); + return -1; + } + + /* continued at RDMA_CM_EVENT_ADDR_RESOLVED */ + + return 0; +} + +int ibw_disconnect(struct ibw_conn *conn) +{ + int rc; + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + + DEBUG(10, ("ibw_disconnect: cmid=%p\n", pconn->cm_id)); + + assert(pconn!=NULL); + + switch(conn->state) { + case IBWC_ERROR: + ibw_conn_priv_destruct(pconn); /* do this here right now */ + break; + case IBWC_CONNECTED: + rc = rdma_disconnect(pconn->cm_id); + if (rc) { + sprintf(ibw_lasterr, "ibw_disconnect failed with %d\n", rc); + DEBUG(0, (ibw_lasterr)); + return rc; + } + break; + default: + DEBUG(9, ("invalid state for disconnect: %d\n", conn->state)); + break; + } + + return 0; +} + +int ibw_alloc_send_buf(struct ibw_conn *conn, void **buf, void **key, uint32_t len) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + struct ibw_wr *p = pconn->wr_list_avail; + + if (p!=NULL) { + DEBUG(10, ("ibw_alloc_send_buf#1: cmid=%p, len=%d\n", pconn->cm_id, len)); + + DLIST_REMOVE(pconn->wr_list_avail, p); + DLIST_ADD(pconn->wr_list_used, p); + + if (len <= pctx->opts.recv_bufsize) { + *buf = (void *)p->buf; + } else { + p->buf_large = ibw_alloc_mr(pctx, pconn, len, &p->mr_large); + if (p->buf_large==NULL) { + sprintf(ibw_lasterr, "ibw_alloc_mr#1 failed\n"); + goto error; + } + *buf = (void *)p->buf_large; + } + /* p->wr_id is already filled in ibw_init_memory */ + } else { + DEBUG(10, ("ibw_alloc_send_buf#2: cmid=%p, len=%d\n", pconn->cm_id, len)); + /* not optimized */ + p = pconn->extra_avail; + if (!p) { + p = pconn->extra_avail = talloc_zero(pconn, struct ibw_wr); + talloc_set_destructor(p, ibw_wr_destruct); + if (p==NULL) { + sprintf(ibw_lasterr, "talloc_zero failed (emax: %u)\n", pconn->extra_max); + goto error; + } + p->wr_id = pctx->opts.max_send_wr + pconn->extra_max; + pconn->extra_max++; + switch(pconn->extra_max) { + case 1: DEBUG(2, ("warning: queue performed\n")); break; + case 10: DEBUG(0, ("warning: queue reached 10\n")); break; + case 100: DEBUG(0, ("warning: queue reached 100\n")); break; + case 1000: DEBUG(0, ("warning: queue reached 1000\n")); break; + default: break; + } + } + + p->buf_large = ibw_alloc_mr(pctx, pconn, len, &p->mr_large); + if (p->buf_large==NULL) { + sprintf(ibw_lasterr, "ibw_alloc_mr#2 failed\n"); + goto error; + } + *buf = (void *)p->buf_large; + + DLIST_REMOVE(pconn->extra_avail, p); + /* we don't have prepared index for this, so that + * we will have to find this by wr_id later on */ + DLIST_ADD(pconn->extra_sent, p); + } + + *key = (void *)p; + + return 0; +error: + DEBUG(0, ("ibw_alloc_send_buf error: %s", ibw_lasterr)); + return -1; +} + + +static int ibw_send_packet(struct ibw_conn *conn, void *buf, struct ibw_wr *p, uint32_t len) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + int rc; + + /* can we send it right now? */ + if (pconn->wr_sent<pctx->opts.max_send_wr) { + struct ibv_send_wr *bad_wr; + struct ibv_sge list = { + .addr = (uintptr_t)buf, + .length = len, + .lkey = pconn->mr_send->lkey + }; + struct ibv_send_wr wr = { + .wr_id = p->wr_id + pctx->opts.max_recv_wr, + .sg_list = &list, + .num_sge = 1, + .opcode = IBV_WR_SEND, + .send_flags = IBV_SEND_SIGNALED, + }; + + if (p->buf_large==NULL) { + DEBUG(10, ("ibw_send#normal(cmid: %p, wrid: %u, n: %d)\n", + pconn->cm_id, (uint32_t)wr.wr_id, len)); + } else { + DEBUG(10, ("ibw_send#large(cmid: %p, wrid: %u, n: %d)\n", + pconn->cm_id, (uint32_t)wr.wr_id, len)); + list.lkey = p->mr_large->lkey; + } + + rc = ibv_post_send(pconn->cm_id->qp, &wr, &bad_wr); + if (rc) { + sprintf(ibw_lasterr, "ibv_post_send error %d (%d)\n", + rc, pconn->wr_sent); + goto error; + } + + pconn->wr_sent++; + + return rc; + } /* else put the request into our own queue: */ + + DEBUG(10, ("ibw_send#queued(cmid: %p, len: %u)\n", pconn->cm_id, len)); + + /* TODO: clarify how to continue when state==IBWC_STOPPED */ + + /* to be sent by ibw_wc_send */ + /* regardless "normal" or [a part of] "large" packet */ + if (!p->queued_ref_cnt) { + DLIST_ADD_END2(pconn->queue, p, struct ibw_wr *, + qprev, qnext); /* TODO: optimize */ + p->queued_msg = buf; + } + p->queued_ref_cnt++; + p->queued_rlen = len; /* last wins; see ibw_wc_send */ + + return 0; +error: + DEBUG(0, (ibw_lasterr)); + return -1; +} + +int ibw_send(struct ibw_conn *conn, void *buf, void *key, uint32_t len) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_wr *p = talloc_get_type(key, struct ibw_wr); + int rc; + + assert(len>=sizeof(uint32_t)); + assert((*((uint32_t *)buf)==len)); /* TODO: htonl */ + + if (len > pctx->opts.recv_bufsize) { + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + int rlen = len; + char *packet = (char *)buf; + uint32_t recv_bufsize = pctx->opts.recv_bufsize; + + DEBUG(10, ("ibw_send#frag(cmid: %p, buf: %p, len: %u)\n", + pconn->cm_id, buf, len)); + + /* single threaded => no race here: */ + assert(p->ref_cnt==0); + while(rlen > recv_bufsize) { + rc = ibw_send_packet(conn, packet, p, recv_bufsize); + if (rc) + return rc; + packet += recv_bufsize; + rlen -= recv_bufsize; + p->ref_cnt++; /* not good to have it in ibw_send_packet */ + } + if (rlen) { + rc = ibw_send_packet(conn, packet, p, rlen); + p->ref_cnt++; /* not good to have it in ibw_send_packet */ + } + p->ref_cnt--; /* for the same handling */ + } else { + assert(p->ref_cnt==0); + assert(p->queued_ref_cnt==0); + + rc = ibw_send_packet(conn, buf, p, len); + } + return rc; +} + +int ibw_cancel_send_buf(struct ibw_conn *conn, void *buf, void *key) +{ + struct ibw_ctx_priv *pctx = talloc_get_type(conn->ctx->internal, struct ibw_ctx_priv); + struct ibw_conn_priv *pconn = talloc_get_type(conn->internal, struct ibw_conn_priv); + struct ibw_wr *p = talloc_get_type(key, struct ibw_wr); + + assert(p!=NULL); + assert(buf!=NULL); + assert(conn!=NULL); + + if (p->buf_large!=NULL) + ibw_free_mr(&p->buf_large, &p->mr_large); + + /* parallel case */ + if (p->wr_id < pctx->opts.max_send_wr) { + DEBUG(10, ("ibw_cancel_send_buf#1 %u", (int)p->wr_id)); + DLIST_REMOVE(pconn->wr_list_used, p); + DLIST_ADD(pconn->wr_list_avail, p); + } else { /* "extra" packet */ + DEBUG(10, ("ibw_cancel_send_buf#2 %u", (int)p->wr_id)); + DLIST_REMOVE(pconn->extra_sent, p); + DLIST_ADD(pconn->extra_avail, p); + } + + return 0; +} + +const char *ibw_getLastError(void) +{ + return ibw_lasterr; +} |