forked from vitalif/vitastor
963 lines
33 KiB
C++
963 lines
33 KiB
C++
#include <stdio.h>
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#include <stdlib.h>
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#include "msgr_rdma.h"
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#include "messenger.h"
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std::string msgr_rdma_address_t::to_string()
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{
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char msg[sizeof "0000:00000000:00000000:00000000000000000000000000000000"];
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sprintf(
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msg, "%04x:%06x:%06x:%016lx%016lx", lid, qpn, psn,
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htobe64(((uint64_t*)&gid)[0]), htobe64(((uint64_t*)&gid)[1])
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);
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return std::string(msg);
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}
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bool msgr_rdma_address_t::from_string(const char *str, msgr_rdma_address_t *dest)
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{
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uint64_t* gid = (uint64_t*)&dest->gid;
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int n = sscanf(
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str, "%hx:%x:%x:%16lx%16lx", &dest->lid, &dest->qpn, &dest->psn, gid, gid+1
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);
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gid[0] = be64toh(gid[0]);
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gid[1] = be64toh(gid[1]);
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return n == 5;
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}
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msgr_rdma_context_t::~msgr_rdma_context_t()
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{
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if (cq)
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ibv_destroy_cq(cq);
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if (channel)
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ibv_destroy_comp_channel(channel);
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if (mr)
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ibv_dereg_mr(mr);
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if (pd)
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ibv_dealloc_pd(pd);
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if (context)
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ibv_close_device(context);
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}
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msgr_rdma_connection_t::~msgr_rdma_connection_t()
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{
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ctx->used_max_cqe -= max_send+max_recv;
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if (qp)
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ibv_destroy_qp(qp);
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}
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msgr_rdma_context_t *msgr_rdma_context_t::create(const char *ib_devname, uint8_t ib_port, uint8_t gid_index, uint32_t mtu)
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{
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int res;
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ibv_device **dev_list = NULL;
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msgr_rdma_context_t *ctx = new msgr_rdma_context_t();
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ctx->mtu = mtu;
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dev_list = ibv_get_device_list(NULL);
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if (!dev_list)
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{
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fprintf(stderr, "Failed to get RDMA device list: %s\n", strerror(errno));
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goto cleanup;
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}
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if (!ib_devname)
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{
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ctx->dev = *dev_list;
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if (!ctx->dev)
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{
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fprintf(stderr, "No RDMA devices found\n");
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goto cleanup;
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}
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}
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else
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{
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int i;
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for (i = 0; dev_list[i]; ++i)
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if (!strcmp(ibv_get_device_name(dev_list[i]), ib_devname))
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break;
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ctx->dev = dev_list[i];
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if (!ctx->dev)
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{
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fprintf(stderr, "RDMA device %s not found\n", ib_devname);
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goto cleanup;
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}
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}
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ctx->context = ibv_open_device(ctx->dev);
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if (!ctx->context)
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{
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fprintf(stderr, "Couldn't get RDMA context for %s\n", ibv_get_device_name(ctx->dev));
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goto cleanup;
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}
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ctx->ib_port = ib_port;
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ctx->gid_index = gid_index;
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if ((res = ibv_query_port(ctx->context, ib_port, &ctx->portinfo)) != 0)
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{
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fprintf(stderr, "Couldn't get RDMA device %s port %d info: %s\n", ibv_get_device_name(ctx->dev), ib_port, strerror(res));
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goto cleanup;
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}
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ctx->my_lid = ctx->portinfo.lid;
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if (ctx->portinfo.link_layer != IBV_LINK_LAYER_ETHERNET && !ctx->my_lid)
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{
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fprintf(stderr, "RDMA device %s must have local LID because it's not Ethernet, but LID is zero\n", ibv_get_device_name(ctx->dev));
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goto cleanup;
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}
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if (ibv_query_gid(ctx->context, ib_port, gid_index, &ctx->my_gid))
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{
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fprintf(stderr, "Couldn't read RDMA device %s GID index %d\n", ibv_get_device_name(ctx->dev), gid_index);
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goto cleanup;
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}
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ctx->pd = ibv_alloc_pd(ctx->context);
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if (!ctx->pd)
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{
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fprintf(stderr, "Couldn't allocate RDMA protection domain\n");
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goto cleanup;
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}
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{
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if (ibv_query_device_ex(ctx->context, NULL, &ctx->attrx))
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{
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fprintf(stderr, "Couldn't query RDMA device for its features\n");
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goto cleanup;
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}
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if (!(ctx->attrx.odp_caps.general_caps & IBV_ODP_SUPPORT) ||
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!(ctx->attrx.odp_caps.general_caps & IBV_ODP_SUPPORT_IMPLICIT) ||
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!(ctx->attrx.odp_caps.per_transport_caps.rc_odp_caps & IBV_ODP_SUPPORT_SEND) ||
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!(ctx->attrx.odp_caps.per_transport_caps.rc_odp_caps & IBV_ODP_SUPPORT_RECV))
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{
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fprintf(stderr, "The RDMA device isn't implicit ODP (On-Demand Paging) capable or does not support RC send and receive with ODP\n");
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goto cleanup;
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}
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}
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ctx->mr = ibv_reg_mr(ctx->pd, NULL, SIZE_MAX, IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_ON_DEMAND);
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if (!ctx->mr)
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{
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fprintf(stderr, "Couldn't register RDMA memory region\n");
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goto cleanup;
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}
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ctx->channel = ibv_create_comp_channel(ctx->context);
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if (!ctx->channel)
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{
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fprintf(stderr, "Couldn't create RDMA completion channel\n");
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goto cleanup;
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}
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ctx->max_cqe = 4096;
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ctx->cq = ibv_create_cq(ctx->context, ctx->max_cqe, NULL, ctx->channel, 0);
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if (!ctx->cq)
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{
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fprintf(stderr, "Couldn't create RDMA completion queue\n");
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goto cleanup;
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}
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if (dev_list)
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ibv_free_device_list(dev_list);
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return ctx;
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cleanup:
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delete ctx;
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if (dev_list)
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ibv_free_device_list(dev_list);
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return NULL;
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}
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msgr_rdma_connection_t *msgr_rdma_connection_t::create(msgr_rdma_context_t *ctx, uint32_t max_send, uint32_t max_recv, uint32_t max_sge)
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{
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msgr_rdma_connection_t *conn = new msgr_rdma_connection_t;
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max_sge = max_sge > ctx->attrx.orig_attr.max_sge ? ctx->attrx.orig_attr.max_sge : max_sge;
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conn->ctx = ctx;
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conn->max_send = max_send;
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conn->max_recv = max_recv;
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conn->max_sge = max_sge;
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ctx->used_max_cqe += max_send+max_recv;
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if (ctx->used_max_cqe > ctx->max_cqe)
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{
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// Resize CQ
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// Mellanox ConnectX-4 supports up to 4194303 CQEs, so it's fine to put everything into a single CQ
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int new_max_cqe = ctx->max_cqe;
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while (ctx->used_max_cqe > new_max_cqe)
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{
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new_max_cqe *= 2;
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}
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if (ibv_resize_cq(ctx->cq, new_max_cqe) != 0)
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{
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fprintf(stderr, "Couldn't resize RDMA completion queue to %d entries\n", new_max_cqe);
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delete conn;
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return NULL;
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}
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ctx->max_cqe = new_max_cqe;
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}
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ibv_qp_init_attr init_attr = {
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.send_cq = ctx->cq,
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.recv_cq = ctx->cq,
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.cap = {
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.max_send_wr = max_send,
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.max_recv_wr = max_recv,
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.max_send_sge = max_sge,
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.max_recv_sge = max_sge,
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},
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.qp_type = IBV_QPT_RC,
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};
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conn->qp = ibv_create_qp(ctx->pd, &init_attr);
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if (!conn->qp)
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{
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fprintf(stderr, "Couldn't create RDMA queue pair\n");
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delete conn;
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return NULL;
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}
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conn->addr.lid = ctx->my_lid;
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conn->addr.gid = ctx->my_gid;
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conn->addr.qpn = conn->qp->qp_num;
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conn->addr.psn = lrand48() & 0xffffff;
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ibv_qp_attr attr = {
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.qp_state = IBV_QPS_INIT,
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.qp_access_flags = 0,
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.pkey_index = 0,
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.port_num = ctx->ib_port,
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};
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if (ibv_modify_qp(conn->qp, &attr, IBV_QP_STATE | IBV_QP_PKEY_INDEX | IBV_QP_PORT | IBV_QP_ACCESS_FLAGS))
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{
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fprintf(stderr, "Failed to switch RDMA queue pair to INIT state\n");
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delete conn;
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return NULL;
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}
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return conn;
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}
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static ibv_mtu mtu_to_ibv_mtu(uint32_t mtu)
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{
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switch (mtu)
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{
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case 256: return IBV_MTU_256;
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case 512: return IBV_MTU_512;
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case 1024: return IBV_MTU_1024;
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case 2048: return IBV_MTU_2048;
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case 4096: return IBV_MTU_4096;
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}
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return IBV_MTU_4096;
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}
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int msgr_rdma_connection_t::connect(msgr_rdma_address_t *dest)
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{
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auto conn = this;
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ibv_qp_attr attr = {
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.qp_state = IBV_QPS_RTR,
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.path_mtu = mtu_to_ibv_mtu(conn->ctx->mtu),
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.rq_psn = dest->psn,
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.sq_psn = conn->addr.psn,
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.dest_qp_num = dest->qpn,
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.ah_attr = {
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.grh = {
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.dgid = dest->gid,
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.sgid_index = conn->ctx->gid_index,
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.hop_limit = 1, // FIXME can it vary?
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},
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.dlid = dest->lid,
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.sl = 0, // service level
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.src_path_bits = 0,
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.is_global = (uint8_t)(dest->gid.global.interface_id ? 1 : 0),
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.port_num = conn->ctx->ib_port,
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},
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.max_rd_atomic = 1,
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.max_dest_rd_atomic = 1,
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// Timeout and min_rnr_timer actual values seem to be 4.096us*2^(timeout+1)
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.min_rnr_timer = 1,
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.timeout = 14,
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.retry_cnt = 7,
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.rnr_retry = 7,
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};
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// FIXME No idea if ibv_modify_qp is a blocking operation or not. No idea if it has a timeout and what it is.
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if (ibv_modify_qp(conn->qp, &attr, IBV_QP_STATE | IBV_QP_AV | IBV_QP_PATH_MTU |
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IBV_QP_DEST_QPN | IBV_QP_RQ_PSN | IBV_QP_MAX_DEST_RD_ATOMIC | IBV_QP_MIN_RNR_TIMER))
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{
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fprintf(stderr, "Failed to switch RDMA queue pair to RTR (ready-to-receive) state\n");
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return 1;
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}
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attr.qp_state = IBV_QPS_RTS;
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if (ibv_modify_qp(conn->qp, &attr, IBV_QP_STATE | IBV_QP_TIMEOUT |
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IBV_QP_RETRY_CNT | IBV_QP_RNR_RETRY | IBV_QP_SQ_PSN | IBV_QP_MAX_QP_RD_ATOMIC))
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{
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fprintf(stderr, "Failed to switch RDMA queue pair to RTS (ready-to-send) state\n");
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return 1;
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}
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return 0;
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}
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// Being the client, connect all server's RDMA queues to our local (client) queues
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bool osd_messenger_t::connect_rdma_server(osd_client_t *cl, json11::Json rdma_addresses, uint64_t server_max_sge)
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{
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if (rdma_addresses.array_items().size() > 0)
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{
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if (!server_max_sge || server_max_sge > rdma_max_sge)
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{
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server_max_sge = rdma_max_sge;
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}
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int n_conn = rdma_addresses.array_items().size();
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if (n_conn < cl->rdma_queues.size())
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{
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for (int i = n_conn; i < cl->rdma_queues.size(); i++)
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{
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delete cl->rdma_queues[i];
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}
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cl->rdma_queues.resize(n_conn);
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}
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else if (n_conn > cl->rdma_queues.size())
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{
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n_conn = cl->rdma_queues.size();
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}
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for (int i = 0; i < n_conn; i++)
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{
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msgr_rdma_address_t addr;
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if (!msgr_rdma_address_t::from_string(rdma_addresses[i].string_value().c_str(), &addr) ||
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cl->rdma_queues[i]->connect(&addr) != 0)
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{
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printf(
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"Failed to connect to OSD %lu (address %s) using RDMA\n",
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cl->osd_num, rdma_addresses[i].string_value().c_str()
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);
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// FIXME: Keep TCP connection in this case
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osd_num_t peer_osd = cl->osd_num;
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stop_client(cl->peer_fd);
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on_connect_peer(peer_osd, -1);
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return false;
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}
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else
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{
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printf("Connected local queue %d to OSD %lu queue %d using RDMA\n", cl->rdma_queues[i]->qp->qp_num, cl->osd_num, addr.qpn);
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if (cl->rdma_queues[i]->max_sge > server_max_sge)
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{
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cl->rdma_queues[i]->max_sge = server_max_sge;
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}
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}
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}
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cl->peer_state = PEER_RDMA;
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tfd->set_fd_handler(cl->peer_fd, false, NULL);
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}
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else
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{
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for (auto rdma_conn: cl->rdma_queues)
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{
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delete rdma_conn;
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}
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cl->rdma_queues.resize(0);
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}
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return true;
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}
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// Being the server, try to connect all client's RDMA queues to our local (server) queues
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bool osd_messenger_t::connect_rdma_client(osd_client_t *cl, json11::Json rdma_addresses, uint64_t client_max_sge)
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{
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if (rdma_addresses.array_items().size() > 0)
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{
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if (!client_max_sge || client_max_sge > rdma_max_sge)
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{
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client_max_sge = rdma_max_sge;
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}
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int n_conn = rdma_addresses.array_items().size();
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if (n_conn > rdma_queues_per_connection)
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{
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n_conn = rdma_queues_per_connection;
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}
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for (int i = 0; i < n_conn; i++)
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{
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msgr_rdma_address_t addr;
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if (msgr_rdma_address_t::from_string(rdma_addresses[i].string_value().c_str(), &addr))
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{
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auto rdma_conn = msgr_rdma_connection_t::create(rdma_context, rdma_max_send, rdma_max_recv, client_max_sge);
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if (rdma_conn && rdma_conn->connect(&addr) == 0)
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{
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printf("Connected local queue %d to client %d queue %d using RDMA\n", rdma_conn->qp->qp_num, cl->peer_fd, addr.qpn);
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cl->rdma_queues.push_back(rdma_conn);
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}
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else
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{
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if (rdma_conn)
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{
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delete rdma_conn;
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}
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printf(
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"Failed to connect RDMA queue pair to %s (client %d queue %d)\n",
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addr.to_string().c_str(), cl->peer_fd, i+1
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);
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// Delete all RDMA queues to keep the TCP connection
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for (int j = 0; j < cl->rdma_queues.size(); j++)
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{
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delete cl->rdma_queues[j];
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}
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cl->rdma_queues.resize(0);
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return false;
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}
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}
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}
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// Switch to RDMA state only after sending the configuration response
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cl->peer_state = PEER_RDMA_CONNECTING;
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for (int i = 0; i < cl->rdma_queues.size(); i++)
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{
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try_recv_rdma(cl, cl->rdma_queues[i]);
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}
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}
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return true;
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}
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static void try_send_rdma_wr(msgr_rdma_connection_t *rc, uint64_t wr_id, ibv_sge *sge, int op_sge)
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{
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timespec tv;
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clock_gettime(CLOCK_REALTIME, &tv);
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uint64_t total = 0;
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for (int i = 0; i < op_sge; i++)
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total += sge[i].length;
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printf("%lu.%09lu RDMA send to queue %d: %lu bytes\n", tv.tv_sec, tv.tv_nsec, rc->qp->qp_num, total);
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ibv_send_wr *bad_wr = NULL;
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ibv_send_wr wr = {
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.wr_id = wr_id,
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.sg_list = sge,
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.num_sge = op_sge,
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.opcode = IBV_WR_SEND,
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.send_flags = IBV_SEND_SIGNALED,
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};
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int err = ibv_post_send(rc->qp, &wr, &bad_wr);
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if (err || bad_wr)
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{
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printf("RDMA send failed: %s\n", strerror(err));
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exit(1);
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}
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rc->cur_send++;
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}
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static void try_recv_rdma_wr(msgr_rdma_connection_t *rc, uint64_t wr_id, ibv_sge *sge, int op_sge)
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{
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timespec tv;
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clock_gettime(CLOCK_REALTIME, &tv);
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uint64_t total = 0;
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for (int i = 0; i < op_sge; i++)
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total += sge[i].length;
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printf("%lu.%09lu RDMA receive from queue %d: %lu bytes\n", tv.tv_sec, tv.tv_nsec, rc->qp->qp_num, total);
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ibv_recv_wr *bad_wr = NULL;
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ibv_recv_wr wr = {
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.wr_id = wr_id,
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.sg_list = sge,
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.num_sge = op_sge,
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};
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int err = ibv_post_recv(rc->qp, &wr, &bad_wr);
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|
if (err || bad_wr)
|
|
{
|
|
printf("RDMA receive failed: %s\n", strerror(err));
|
|
exit(1);
|
|
}
|
|
rc->cur_recv++;
|
|
}
|
|
|
|
static bool try_recv_rdma_read(osd_client_t *cl, msgr_rdma_connection_t *rc, osd_op_t *cur_op, uint32_t bs_bitmap_granularity)
|
|
{
|
|
int op_size = bs_bitmap_granularity, op_sge = 1, op_max = rc->max_sge*bs_bitmap_granularity;
|
|
iovec *segments = cur_op->iov.get_iovec();
|
|
ibv_sge sge[rc->max_sge];
|
|
sge[0] = {
|
|
.addr = (uintptr_t)cur_op->reply.buf,
|
|
.length = (uint32_t)OSD_PACKET_SIZE,
|
|
.lkey = rc->ctx->mr->lkey,
|
|
};
|
|
while (rc->recv_pos < cur_op->iov.get_size())
|
|
{
|
|
iovec & iov = segments[rc->recv_pos];
|
|
if (op_size >= op_max || op_sge >= rc->max_sge)
|
|
{
|
|
try_recv_rdma_wr(rc, cl->peer_fd, sge, op_sge);
|
|
op_sge = 0;
|
|
op_size = 0;
|
|
if (rc->cur_recv >= rc->max_recv)
|
|
{
|
|
// FIXME
|
|
exit(1);
|
|
}
|
|
}
|
|
// Receive in (max_sge*4k) fragments
|
|
uint32_t len = (uint32_t)(op_size+iov.iov_len-rc->recv_buf_pos < op_max
|
|
? iov.iov_len-rc->recv_buf_pos : op_max-op_size);
|
|
sge[op_sge++] = {
|
|
.addr = (uintptr_t)(iov.iov_base+rc->recv_buf_pos),
|
|
.length = len,
|
|
.lkey = rc->ctx->mr->lkey,
|
|
};
|
|
op_size += len;
|
|
rc->recv_buf_pos += len;
|
|
if (rc->recv_buf_pos >= iov.iov_len)
|
|
{
|
|
rc->recv_pos++;
|
|
rc->recv_buf_pos = 0;
|
|
}
|
|
}
|
|
if (op_sge > 0)
|
|
{
|
|
try_recv_rdma_wr(rc, cl->peer_fd, sge, op_sge);
|
|
}
|
|
rc->recv_pos = 0;
|
|
rc->recv_buf_pos = 0;
|
|
return true;
|
|
}
|
|
|
|
static bool try_send_rdma_read(osd_client_t *cl, msgr_rdma_connection_t *rc, osd_op_t *cur_op, int op_list_size, uint32_t bs_bitmap_granularity)
|
|
{
|
|
ibv_sge sge[rc->max_sge];
|
|
int op_size = bs_bitmap_granularity, op_sge = 1, op_max = rc->max_sge*bs_bitmap_granularity;
|
|
sge[0] = {
|
|
.addr = (uintptr_t)cl->send_list[0].iov_base,
|
|
.length = (uint32_t)cl->send_list[0].iov_len,
|
|
.lkey = rc->ctx->mr->lkey,
|
|
};
|
|
rc->send_pos = 1;
|
|
while (rc->send_pos < op_list_size)
|
|
{
|
|
iovec & iov = cl->send_list[rc->send_pos];
|
|
if (cl->outbox[rc->send_pos].flags & MSGR_SENDP_HDR)
|
|
{
|
|
if (op_sge > 0)
|
|
{
|
|
try_send_rdma_wr(rc, cl->peer_fd, sge, op_sge);
|
|
op_sge = 0;
|
|
op_size = 0;
|
|
if (rc->cur_send >= rc->max_send)
|
|
break;
|
|
}
|
|
assert(rc->send_buf_pos == 0);
|
|
sge[0] = {
|
|
.addr = (uintptr_t)iov.iov_base,
|
|
.length = (uint32_t)iov.iov_len,
|
|
.lkey = rc->ctx->mr->lkey,
|
|
};
|
|
try_send_rdma_wr(rc, cl->peer_fd, sge, 1);
|
|
rc->send_pos++;
|
|
if (rc->cur_send >= rc->max_send)
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
if (op_size >= op_max || op_sge >= rc->max_sge)
|
|
{
|
|
try_send_rdma_wr(rc, cl->peer_fd, sge, op_sge);
|
|
op_sge = 0;
|
|
op_size = 0;
|
|
if (rc->cur_send >= rc->max_send)
|
|
break;
|
|
}
|
|
// Fragment all messages into parts no longer than (max_sge*4k) = 120k on ConnectX-4
|
|
// Otherwise the client may not be able to receive them in small parts
|
|
uint32_t len = (uint32_t)(op_size+iov.iov_len-rc->send_buf_pos < op_max ? iov.iov_len-rc->send_buf_pos : op_max-op_size);
|
|
sge[op_sge++] = {
|
|
.addr = (uintptr_t)(iov.iov_base+rc->send_buf_pos),
|
|
.length = len,
|
|
.lkey = rc->ctx->mr->lkey,
|
|
};
|
|
op_size += len;
|
|
rc->send_buf_pos += len;
|
|
if (rc->send_buf_pos >= iov.iov_len)
|
|
{
|
|
rc->send_pos++;
|
|
rc->send_buf_pos = 0;
|
|
}
|
|
}
|
|
}
|
|
if (op_sge > 0)
|
|
{
|
|
try_send_rdma_wr(rc, cl->peer_fd, sge, op_sge);
|
|
}
|
|
if (op_list_size == 1)
|
|
{
|
|
if (cur_op->req.hdr.opcode == OSD_OP_SEC_READ ||
|
|
cur_op->req.hdr.opcode == OSD_OP_READ)
|
|
{
|
|
sge[0] = {
|
|
.addr = 0,
|
|
.length = 0,
|
|
.lkey = rc->ctx->mr->lkey,
|
|
};
|
|
uint64_t data_size = cur_op->req.hdr.opcode == OSD_OP_SEC_READ
|
|
? cur_op->req.sec_rw.len
|
|
: cur_op->req.rw.len;
|
|
while (data_size >= op_max)
|
|
{
|
|
try_send_rdma_wr(rc, cl->peer_fd, sge, 1);
|
|
data_size -= op_max;
|
|
}
|
|
if (data_size > 0)
|
|
try_send_rdma_wr(rc, cl->peer_fd, sge, 1);
|
|
}
|
|
else if (cur_op->req.hdr.opcode == OSD_OP_SEC_READ_BMP)
|
|
{
|
|
sge[0] = {
|
|
.addr = 0,
|
|
.length = 0,
|
|
.lkey = rc->ctx->mr->lkey,
|
|
};
|
|
try_send_rdma_wr(rc, cl->peer_fd, sge, 1);
|
|
}
|
|
else
|
|
return true;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void osd_messenger_t::try_send_rdma(osd_client_t *cl)
|
|
{
|
|
// Two different algorithms for outgoing and incoming operations
|
|
while (cl->outbox.size() > 0)
|
|
{
|
|
osd_op_t *cur_op = cl->outbox[0].op;
|
|
if (cur_op->op_type == OSD_OP_OUT)
|
|
{
|
|
// Pick a queue. Send operation to it in one part.
|
|
int qi;
|
|
for (qi = 0; qi < cl->rdma_queues.size() && cl->rdma_queues[qi]->cur_op != NULL; qi++) {}
|
|
if (qi >= cl->rdma_queues.size())
|
|
{
|
|
// No free queues, retry later.
|
|
// We only post 1 operation per queue to use the queue pair number as a 'tag'.
|
|
return;
|
|
}
|
|
// Pick all entries for the operation from the queue
|
|
int op_list_size = 0;
|
|
while (op_list_size < cl->outbox.size() && cl->outbox[op_list_size].op == cur_op)
|
|
{
|
|
op_list_size++;
|
|
}
|
|
auto rq = cl->rdma_queues[qi];
|
|
rq->cur_op = cur_op;
|
|
ibv_sge sge[rq->max_sge];
|
|
// FIXME: This won't work with long bitmaps. But I don't care, I want to finally test fucking RDMA
|
|
// header or header+data
|
|
sge[0] = {
|
|
.addr = (uintptr_t)cl->send_list[0].iov_base,
|
|
.length = (uint32_t)cl->send_list[0].iov_len,
|
|
.lkey = rq->ctx->mr->lkey,
|
|
};
|
|
if (op_list_size == 2)
|
|
{
|
|
auto & iov = cl->send_list[1];
|
|
sge[1] = {
|
|
.addr = (uintptr_t)iov.iov_base,
|
|
.length = (uint32_t)iov.iov_len,
|
|
.lkey = rq->ctx->mr->lkey,
|
|
};
|
|
try_send_rdma_wr(rq, cl->peer_fd, sge, 2);
|
|
}
|
|
else if (op_list_size == 1)
|
|
{
|
|
try_send_rdma_wr(rq, cl->peer_fd, sge, 1);
|
|
}
|
|
else
|
|
{
|
|
printf("unexpected long send_list for opcode %lu: %lu entries\n", cur_op->req.hdr.opcode, cl->send_list.size());
|
|
exit(1);
|
|
}
|
|
cl->send_list.erase(cl->send_list.begin(), cl->send_list.begin()+op_list_size);
|
|
cl->outbox.erase(cl->outbox.begin(), cl->outbox.begin()+op_list_size);
|
|
// Post a receive request for the reply at the same time
|
|
if (cur_op->req.hdr.opcode == OSD_OP_SEC_READ ||
|
|
cur_op->req.hdr.opcode == OSD_OP_READ)
|
|
{
|
|
try_recv_rdma_read(cl, rq, cur_op, bs_bitmap_granularity);
|
|
}
|
|
else if (cur_op->req.hdr.opcode == OSD_OP_SEC_READ_BMP)
|
|
{
|
|
assert(!cur_op->iov.count);
|
|
// FIXME: hardcode
|
|
#define clean_entry_bitmap_size 4
|
|
// Reply size is known
|
|
uint64_t data_size = cur_op->req.sec_read_bmp.len / sizeof(obj_ver_id) * (8 + clean_entry_bitmap_size);
|
|
cur_op->rmw_buf = malloc_or_die(data_size);
|
|
sge[0] = {
|
|
.addr = (uintptr_t)cur_op->reply.buf,
|
|
.length = (uint32_t)OSD_PACKET_SIZE,
|
|
.lkey = rq->ctx->mr->lkey,
|
|
};
|
|
sge[1] = {
|
|
.addr = (uintptr_t)cur_op->rmw_buf,
|
|
.length = (uint32_t)data_size,
|
|
.lkey = rq->ctx->mr->lkey,
|
|
};
|
|
try_recv_rdma_wr(rq, cl->peer_fd, sge, 2);
|
|
}
|
|
else
|
|
{
|
|
// No reply or reply size is unknown
|
|
sge[0] = {
|
|
.addr = (uintptr_t)cur_op->reply.buf,
|
|
.length = (uint32_t)OSD_PACKET_SIZE,
|
|
.lkey = rq->ctx->mr->lkey,
|
|
};
|
|
try_recv_rdma_wr(rq, cl->peer_fd, sge, 1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Send reply to the same queue the operation came from.
|
|
// Fragment it into parts no longer than (max_sge*4k) to always
|
|
// be able to send and receive them correctly.
|
|
int qi;
|
|
for (qi = 0; qi < cl->rdma_queues.size() && cl->rdma_queues[qi]->cur_op != cur_op; qi++) {}
|
|
if (qi >= cl->rdma_queues.size())
|
|
{
|
|
printf("Unknown incoming operation for client %d\n", cl->peer_fd);
|
|
exit(1);
|
|
}
|
|
// Pick all entries for the operation from the queue
|
|
int op_list_size = 0;
|
|
while (op_list_size < cl->outbox.size() && cl->outbox[op_list_size].op == cur_op)
|
|
{
|
|
op_list_size++;
|
|
}
|
|
auto rq = cl->rdma_queues[qi];
|
|
if (cur_op->req.hdr.opcode == OSD_OP_SEC_READ ||
|
|
cur_op->req.hdr.opcode == OSD_OP_READ)
|
|
{
|
|
try_send_rdma_read(cl, rq, cur_op, op_list_size, bs_bitmap_granularity);
|
|
rq->send_pos = 0;
|
|
rq->send_buf_pos = 0;
|
|
}
|
|
else if (op_list_size == 1)
|
|
{
|
|
ibv_sge sge[1];
|
|
sge[0] = {
|
|
.addr = (uintptr_t)cl->send_list[0].iov_base,
|
|
.length = (uint32_t)cl->send_list[0].iov_len,
|
|
.lkey = rq->ctx->mr->lkey,
|
|
};
|
|
try_send_rdma_wr(rq, cl->peer_fd, sge, 1);
|
|
}
|
|
else if (op_list_size == 2)
|
|
{
|
|
ibv_sge sge[2];
|
|
sge[0] = {
|
|
.addr = (uintptr_t)cl->send_list[0].iov_base,
|
|
.length = (uint32_t)cl->send_list[0].iov_len,
|
|
.lkey = rq->ctx->mr->lkey,
|
|
};
|
|
sge[1] = {
|
|
.addr = (uintptr_t)cl->send_list[1].iov_base,
|
|
.length = (uint32_t)cl->send_list[1].iov_len,
|
|
.lkey = rq->ctx->mr->lkey,
|
|
};
|
|
if (cur_op->req.hdr.opcode == OSD_OP_SEC_READ_BMP)
|
|
try_send_rdma_wr(rq, cl->peer_fd, sge, 2);
|
|
else
|
|
{
|
|
try_send_rdma_wr(rq, cl->peer_fd, sge, 1);
|
|
try_send_rdma_wr(rq, cl->peer_fd, sge+1, 1);
|
|
}
|
|
}
|
|
else if (op_list_size > 2)
|
|
{
|
|
printf("Unexpected long send_list for opcode %lu: %lu entries\n", cur_op->req.hdr.opcode, cl->send_list.size());
|
|
exit(1);
|
|
}
|
|
cl->send_list.erase(cl->send_list.begin(), cl->send_list.begin()+op_list_size);
|
|
cl->outbox.erase(cl->outbox.begin(), cl->outbox.begin()+op_list_size);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Try to receive an incoming operation via RDMA
|
|
void osd_messenger_t::try_recv_rdma(osd_client_t *cl, msgr_rdma_connection_t *rc)
|
|
{
|
|
rc->cur_op = new osd_op_t;
|
|
rc->cur_op->peer_fd = cl->peer_fd;
|
|
rc->cur_op->op_type = OSD_OP_IN;
|
|
rc->cur_op->buf = memalign_or_die(MEM_ALIGNMENT, 128*1024); // FIXME hardcode for tests
|
|
ibv_sge sge[2];
|
|
sge[0] = {
|
|
.addr = (uintptr_t)rc->cur_op->req.buf,
|
|
.length = (uint32_t)OSD_PACKET_SIZE,
|
|
.lkey = rc->ctx->mr->lkey,
|
|
};
|
|
sge[1] = {
|
|
.addr = (uintptr_t)rc->cur_op->buf,
|
|
.length = (uint32_t)128*1024,
|
|
.lkey = rc->ctx->mr->lkey,
|
|
};
|
|
try_recv_rdma_wr(rc, cl->peer_fd, sge, 2);
|
|
}
|
|
|
|
#define RDMA_EVENTS_AT_ONCE 32
|
|
|
|
void osd_messenger_t::handle_rdma_events()
|
|
{
|
|
// Request next notification
|
|
ibv_cq *ev_cq;
|
|
void *ev_ctx;
|
|
// FIXME: This is inefficient as it calls read()...
|
|
timespec tv;
|
|
if (ibv_get_cq_event(rdma_context->channel, &ev_cq, &ev_ctx) == 0)
|
|
{
|
|
ibv_ack_cq_events(rdma_context->cq, 1);
|
|
}
|
|
if (ibv_req_notify_cq(rdma_context->cq, 0) != 0)
|
|
{
|
|
printf("Failed to request RDMA completion notification, exiting\n");
|
|
exit(1);
|
|
}
|
|
ibv_wc wc[RDMA_EVENTS_AT_ONCE];
|
|
int event_count;
|
|
do
|
|
{
|
|
event_count = ibv_poll_cq(rdma_context->cq, RDMA_EVENTS_AT_ONCE, wc);
|
|
for (int i = 0; i < event_count; i++)
|
|
{
|
|
int client_id = wc[i].wr_id;
|
|
bool is_send = wc[i].opcode == IBV_WC_SEND;
|
|
auto cl_it = clients.find(client_id);
|
|
if (cl_it == clients.end())
|
|
{
|
|
continue;
|
|
}
|
|
osd_client_t *cl = cl_it->second;
|
|
if (wc[i].status != IBV_WC_SUCCESS)
|
|
{
|
|
printf("RDMA work request failed for client %d", client_id);
|
|
if (cl->osd_num)
|
|
{
|
|
printf(" (OSD %lu)", cl->osd_num);
|
|
}
|
|
printf(" with status: %s, stopping client\n", ibv_wc_status_str(wc[i].status));
|
|
stop_client(client_id);
|
|
continue;
|
|
}
|
|
int q;
|
|
for (q = 0; q < cl->rdma_queues.size() && cl->rdma_queues[q]->qp->qp_num != wc[i].qp_num; q++) {}
|
|
if (q >= cl->rdma_queues.size())
|
|
{
|
|
printf("Unknown queue %d for client %d\n", wc[i].qp_num, cl->peer_fd);
|
|
exit(1);
|
|
}
|
|
auto rc = cl->rdma_queues[q];
|
|
if (is_send)
|
|
{
|
|
clock_gettime(CLOCK_REALTIME, &tv);
|
|
printf("%lu.%09lu Done RDMA send on queue %d\n", tv.tv_sec, tv.tv_nsec, wc[i].qp_num);
|
|
}
|
|
else
|
|
{
|
|
clock_gettime(CLOCK_REALTIME, &tv);
|
|
printf("%lu.%09lu Done RDMA recv on queue %d, %d bytes\n", tv.tv_sec, tv.tv_nsec, wc[i].qp_num, wc[i].byte_len);
|
|
}
|
|
if (!is_send)
|
|
{
|
|
rc->cur_recv--;
|
|
if (!rc->cur_recv)
|
|
{
|
|
// Fucking shit...
|
|
if (rc->cur_op->op_type == OSD_OP_IN)
|
|
{
|
|
if (wc[i].byte_len <= OSD_PACKET_SIZE)
|
|
{
|
|
free(rc->cur_op->buf);
|
|
rc->cur_op->buf = NULL;
|
|
}
|
|
cl->received_ops.push_back(rc->cur_op);
|
|
set_immediate.push_back([this, op = rc->cur_op]() { exec_op(op); });
|
|
}
|
|
else /* if (rc->cur_op->op_type == OSD_OP_OUT) */
|
|
{
|
|
if (rc->cur_op->reply.hdr.opcode == OSD_OP_SEC_READ ||
|
|
rc->cur_op->reply.hdr.opcode == OSD_OP_READ)
|
|
{
|
|
// Data is already received
|
|
cl->sent_ops.erase(rc->cur_op->req.hdr.id);
|
|
handle_reply_ready(rc->cur_op);
|
|
rc->cur_op = NULL;
|
|
try_send_rdma(cl);
|
|
}
|
|
else if (rc->cur_op->reply.hdr.opcode == OSD_OP_SEC_READ_BMP)
|
|
{
|
|
// Data is already received, but we need to switch buffers
|
|
cl->sent_ops.erase(rc->cur_op->req.hdr.id);
|
|
free(rc->cur_op->buf);
|
|
rc->cur_op->buf = rc->cur_op->rmw_buf;
|
|
handle_reply_ready(rc->cur_op);
|
|
rc->cur_op = NULL;
|
|
try_send_rdma(cl);
|
|
}
|
|
else if (rc->cur_op->reply.hdr.opcode == OSD_OP_SEC_LIST && rc->cur_op->reply.hdr.retval > 0 ||
|
|
rc->cur_op->reply.hdr.opcode == OSD_OP_SHOW_CONFIG && rc->cur_op->reply.hdr.retval > 0)
|
|
{
|
|
if (rc->recv_pos != 1)
|
|
{
|
|
// Data is not received yet (RNR)
|
|
uint32_t len;
|
|
if (rc->cur_op->reply.hdr.opcode == OSD_OP_SEC_LIST)
|
|
len = sizeof(obj_ver_id) * rc->cur_op->reply.hdr.retval;
|
|
else
|
|
len = rc->cur_op->reply.hdr.retval;
|
|
rc->cur_op->buf = malloc_or_die(len);
|
|
ibv_sge sge[1];
|
|
sge[0] = {
|
|
.addr = (uintptr_t)rc->cur_op->buf,
|
|
.length = len,
|
|
.lkey = rc->ctx->mr->lkey,
|
|
};
|
|
try_recv_rdma_wr(rc, cl->peer_fd, sge, 1);
|
|
rc->recv_pos = 1;
|
|
}
|
|
else
|
|
{
|
|
// Done
|
|
cl->sent_ops.erase(rc->cur_op->req.hdr.id);
|
|
handle_reply_ready(rc->cur_op);
|
|
rc->cur_op = NULL;
|
|
rc->recv_pos = 0;
|
|
try_send_rdma(cl);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// No data
|
|
cl->sent_ops.erase(rc->cur_op->req.hdr.id);
|
|
handle_reply_ready(rc->cur_op);
|
|
rc->cur_op = NULL;
|
|
try_send_rdma(cl);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
rc->cur_send--;
|
|
if (!rc->cur_send)
|
|
{
|
|
if (rc->cur_op->op_type == OSD_OP_OUT)
|
|
{
|
|
// Nothing
|
|
}
|
|
else /* if (rc->cur_op->op_type == OSD_OP_IN) */
|
|
{
|
|
// Reply fully sent
|
|
delete rc->cur_op;
|
|
rc->cur_op = NULL;
|
|
// Post receive for the next incoming op
|
|
try_recv_rdma(cl, rc);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} while (event_count > 0);
|
|
for (auto cb: set_immediate)
|
|
{
|
|
cb();
|
|
}
|
|
set_immediate.clear();
|
|
}
|
|
|
|
int osd_messenger_t::get_rdma_max_sge()
|
|
{
|
|
return rdma_max_sge;
|
|
}
|