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-rw-r--r--ctdb/ib/ibwrapper.c1361
1 files changed, 1361 insertions, 0 deletions
diff --git a/ctdb/ib/ibwrapper.c b/ctdb/ib/ibwrapper.c
new file mode 100644
index 0000000..cf4efa5
--- /dev/null
+++ b/ctdb/ib/ibwrapper.c
@@ -0,0 +1,1361 @@
+/*
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "replace.h"
+#include "system/network.h"
+
+#include <assert.h>
+#include <talloc.h>
+#include <tevent.h>
+
+#include "lib/util/dlinklist.h"
+#include "lib/util/debug.h"
+
+#include "common/logging.h"
+
+#include <rdma/rdma_cma_abi.h>
+#include <rdma/rdma_cma.h>
+
+#include "ibwrapper.h"
+#include "ibwrapper_internal.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 tevent_context *ev,
+ struct tevent_fd *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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("ibw_free_mr(%p %p)\n", *ppbuf, *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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("ibw_ctx_priv_destruct(%p)\n", pctx));
+
+ /*
+ * tevent_fd must be removed before the fd is closed
+ */
+ TALLOC_FREE(pctx->cm_channel_event);
+
+ /* destroy cm */
+ if (pctx->cm_channel) {
+ rdma_destroy_event_channel(pctx->cm_channel);
+ pctx->cm_channel = 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(DEBUG_DEBUG, ("ibw_ctx_destruct(%p)\n", ctx));
+ return 0;
+}
+
+static int ibw_conn_priv_destruct(struct ibw_conn_priv *pconn)
+{
+ DEBUG(DEBUG_DEBUG, ("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 */
+
+ /*
+ * tevent_fd must be removed before the fd is closed
+ */
+ TALLOC_FREE(pconn->verbs_channel_event);
+
+ /* 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;
+ }
+
+ /* 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(DEBUG_DEBUG, ("pconn=%p pd deallocated\n", pconn));
+ }
+
+ if (pconn->cm_id) {
+ rdma_destroy_id(pconn->cm_id);
+ pconn->cm_id = NULL;
+ DEBUG(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("ibw_conn_destruct(%p)\n", 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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("created channel %p\n", pconn->verbs_channel));
+
+ pconn->verbs_channel_event = tevent_add_fd(pctx->ectx, NULL, /* not pconn or conn */
+ pconn->verbs_channel->fd, TEVENT_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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_ERR, ("%s", 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(DEBUG_DEBUG, ("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(DEBUG_ERR, ("%s", 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(DEBUG_DEBUG, ("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 tevent_context *ev,
+ struct tevent_fd *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;
+ event = NULL;
+ sprintf(ibw_lasterr, "rdma_get_cm_event error %d\n", rc);
+ goto error;
+ }
+ cma_id = event->id;
+
+ DEBUG(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_ERR, ("rdma_reject failed with rc=%d\n", rc));
+ talloc_free(conn);
+ DEBUG(DEBUG_DEBUG, ("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(DEBUG_INFO, ("ESTABLISHED (conn: %p)\n", cma_id->context));
+ conn = talloc_get_type(cma_id->context, struct ibw_conn);
+ assert(conn!=NULL); /* important assumption */
+
+ DEBUG(DEBUG_DEBUG, ("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);
+ goto error;
+ case RDMA_CM_EVENT_ROUTE_ERROR:
+ sprintf(ibw_lasterr, "RDMA_CM_EVENT_ROUTE_ERROR, error %d\n", event->status);
+ goto error;
+ case RDMA_CM_EVENT_CONNECT_ERROR:
+ sprintf(ibw_lasterr, "RDMA_CM_EVENT_CONNECT_ERROR, error %d\n", event->status);
+ goto error;
+ case RDMA_CM_EVENT_UNREACHABLE:
+ sprintf(ibw_lasterr, "RDMA_CM_EVENT_UNREACHABLE, error %d\n", event->status);
+ goto error;
+ case RDMA_CM_EVENT_REJECTED:
+ sprintf(ibw_lasterr, "RDMA_CM_EVENT_REJECTED, error %d\n", event->status);
+ DEBUG(DEBUG_INFO, ("cm event handler: %s", ibw_lasterr));
+ conn = talloc_get_type(cma_id->context, struct ibw_conn);
+ if (conn) {
+ /* must be done BEFORE connstate */
+ if ((rc=rdma_ack_cm_event(event)))
+ DEBUG(DEBUG_ERR, ("reject/rdma_ack_cm_event failed with %d\n", rc));
+ event = NULL; /* not to touch cma_id or conn */
+ conn->state = IBWC_ERROR;
+ /* it should free the conn */
+ pctx->connstate_func(NULL, conn);
+ }
+ break; /* this is not strictly an error */
+
+ case RDMA_CM_EVENT_DISCONNECTED:
+ DEBUG(DEBUG_DEBUG, ("RDMA_CM_EVENT_DISCONNECTED\n"));
+ if ((rc=rdma_ack_cm_event(event)))
+ DEBUG(DEBUG_ERR, ("disc/rdma_ack_cm_event failed with %d\n", rc));
+ event = NULL; /* don't ack more */
+
+ if (cma_id!=pctx->cm_id) {
+ DEBUG(DEBUG_ERR, ("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:
+ DEBUG(DEBUG_ERR, ("cm event handler: %s", ibw_lasterr));
+
+ if (event!=NULL) {
+ if (cma_id!=NULL && 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);
+ }
+
+ if ((rc=rdma_ack_cm_event(event))!=0) {
+ DEBUG(DEBUG_ERR, ("rdma_ack_cm_event failed with %d\n", rc));
+ }
+ }
+
+ return;
+}
+
+static void ibw_event_handler_verbs(struct tevent_context *ev,
+ struct tevent_fd *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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("send completion\n"));
+ if (ibw_wc_send(conn, &wc))
+ goto error;
+ break;
+
+ case IBV_WC_RDMA_WRITE:
+ DEBUG(DEBUG_DEBUG, ("rdma write completion\n"));
+ break;
+
+ case IBV_WC_RDMA_READ:
+ DEBUG(DEBUG_DEBUG, ("rdma read completion\n"));
+ break;
+
+ case IBV_WC_RECV:
+ DEBUG(DEBUG_DEBUG, ("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(DEBUG_ERR, ("%s", 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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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) {
+ if (pctx->receive_func(conn, part->buf, part->len) != 0) {
+ goto error;
+ }
+ 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) {
+ if (pctx->receive_func(conn, p, msglen) != 0) {
+ goto error;
+ }
+ 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(DEBUG_ERR, ("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(DEBUG_DEBUG, ("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 tevent_context *ectx)
+{
+ struct ibw_ctx *ctx = talloc_zero(NULL, struct ibw_ctx);
+ struct ibw_ctx_priv *pctx;
+ int rc;
+
+ DEBUG(DEBUG_DEBUG, ("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 = tevent_add_fd(pctx->ectx, pctx,
+ pctx->cm_channel->fd, TEVENT_FD_READ, ibw_event_handler_cm, ctx);
+
+#if RDMA_USER_CM_MAX_ABI_VERSION >= 2
+ rc = rdma_create_id(pctx->cm_channel, &pctx->cm_id, ctx, RDMA_PS_TCP);
+#else
+ rc = rdma_create_id(pctx->cm_channel, &pctx->cm_id, ctx);
+#endif
+ if (rc) {
+ rc = errno;
+ sprintf(ibw_lasterr, "rdma_create_id error %d\n", rc);
+ goto cleanup;
+ }
+ DEBUG(DEBUG_DEBUG, ("created cm_id %p\n", pctx->cm_id));
+
+ pctx->pagesize = sysconf(_SC_PAGESIZE);
+
+ return ctx;
+ /* don't put code here */
+cleanup:
+ DEBUG(DEBUG_ERR, ("%s", 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(DEBUG_DEBUG, ("ibw_stop\n"));
+
+ for(p=ctx->conn_list; p!=NULL; p=p->next) {
+ if (p->state==IBWC_ERROR || p->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(DEBUG_DEBUG, ("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(DEBUG_ERR, ("%s", ibw_lasterr));
+ return rc;
+ }
+ DEBUG(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("ibw_listen\n"));
+ rc = rdma_listen(pctx->cm_id, backlog);
+ if (rc) {
+ sprintf(ibw_lasterr, "rdma_listen failed: %d\n", rc);
+ DEBUG(DEBUG_ERR, ("%s", 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(DEBUG_DEBUG, ("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(DEBUG_ERR, ("%s", 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(DEBUG_DEBUG, ("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(DEBUG_ERR, ("ibw_connect/ibw_pconn_destruct failed for cm_id=%p\n", pconn->cm_id));
+ return -1;
+ }
+
+ /* init cm */
+#if RDMA_USER_CM_MAX_ABI_VERSION >= 2
+ rc = rdma_create_id(pctx->cm_channel, &pconn->cm_id, conn, RDMA_PS_TCP);
+#else
+ rc = rdma_create_id(pctx->cm_channel, &pconn->cm_id, conn);
+#endif
+ if (rc) {
+ rc = errno;
+ sprintf(ibw_lasterr, "ibw_connect/rdma_create_id error %d\n", rc);
+ talloc_free(conn);
+ return -1;
+ }
+ DEBUG(DEBUG_DEBUG, ("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(DEBUG_ERR, ("%s", 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(DEBUG_DEBUG, ("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(DEBUG_ERR, ("%s", ibw_lasterr));
+ return rc;
+ }
+ break;
+ default:
+ DEBUG(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_INFO, ("warning: queue performed\n")); break;
+ case 10: DEBUG(DEBUG_INFO, ("warning: queue reached 10\n")); break;
+ case 100: DEBUG(DEBUG_INFO, ("warning: queue reached 100\n")); break;
+ case 1000: DEBUG(DEBUG_INFO, ("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(DEBUG_ERR, ("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(DEBUG_DEBUG, ("ibw_send#normal(cmid: %p, wrid: %u, n: %d)\n",
+ pconn->cm_id, (uint32_t)wr.wr_id, len));
+ } else {
+ DEBUG(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_ERR, ("%s", 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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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(DEBUG_DEBUG, ("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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 03:43:58 +0000