/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR Linux-OpenIB) */ /* * Copyright (c) 2008, 2018 Oracle and/or its affiliates. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. *
*/
#ifndef _LINUX_RDS_H #define _LINUX_RDS_H
#include <linux/types.h> #include <linux/socket.h> /* For __kernel_sockaddr_storage. */ #include <linux/in6.h> /* For struct in6_addr. */
/* Socket option to tap receive path latency * SO_RDS: SO_RDS_MSG_RXPATH_LATENCY * Format used struct rds_rx_trace_so
*/ #define SO_RDS_MSG_RXPATH_LATENCY 10
/* supported values for SO_RDS_TRANSPORT */ #define RDS_TRANS_IB 0 #define RDS_TRANS_GAP 1 #define RDS_TRANS_TCP 2 #define RDS_TRANS_COUNT 3 #define RDS_TRANS_NONE (~0) /* don't use RDS_TRANS_IWARP - it is deprecated */ #define RDS_TRANS_IWARP RDS_TRANS_GAP
/* * Control message types for SOL_RDS. * * CMSG_RDMA_ARGS (sendmsg) * Request a RDMA transfer to/from the specified * memory ranges. * The cmsg_data is a struct rds_rdma_args. * RDS_CMSG_RDMA_DEST (recvmsg, sendmsg) * Kernel informs application about intended * source/destination of a RDMA transfer * RDS_CMSG_RDMA_MAP (sendmsg) * Application asks kernel to map the given * memory range into a IB MR, and send the * R_Key along in an RDS extension header. * The cmsg_data is a struct rds_get_mr_args, * the same as for the GET_MR setsockopt. * RDS_CMSG_RDMA_STATUS (recvmsg) * Returns the status of a completed RDMA operation. * RDS_CMSG_RXPATH_LATENCY(recvmsg) * Returns rds message latencies in various stages of receive * path in nS. Its set per socket using SO_RDS_MSG_RXPATH_LATENCY * socket option. Legitimate points are defined in * enum rds_message_rxpath_latency. More points can be added in * future. CSMG format is struct rds_cmsg_rx_trace.
*/ #define RDS_CMSG_RDMA_ARGS 1 #define RDS_CMSG_RDMA_DEST 2 #define RDS_CMSG_RDMA_MAP 3 #define RDS_CMSG_RDMA_STATUS 4 #define RDS_CMSG_CONG_UPDATE 5 #define RDS_CMSG_ATOMIC_FADD 6 #define RDS_CMSG_ATOMIC_CSWP 7 #define RDS_CMSG_MASKED_ATOMIC_FADD 8 #define RDS_CMSG_MASKED_ATOMIC_CSWP 9 #define RDS_CMSG_RXPATH_LATENCY 11 #define RDS_CMSG_ZCOPY_COOKIE 12 #define RDS_CMSG_ZCOPY_COMPLETION 13
/* * Congestion monitoring. * Congestion control in RDS happens at the host connection * level by exchanging a bitmap marking congested ports. * By default, a process sleeping in poll() is always woken * up when the congestion map is updated. * With explicit monitoring, an application can have more * fine-grained control. * The application installs a 64bit mask value in the socket, * where each bit corresponds to a group of ports. * When a congestion update arrives, RDS checks the set of * ports that are now uncongested against the list bit mask * installed in the socket, and if they overlap, we queue a * cong_notification on the socket. * * To install the congestion monitor bitmask, use RDS_CONG_MONITOR * with the 64bit mask. * Congestion updates are received via RDS_CMSG_CONG_UPDATE * control messages. * * The correspondence between bits and ports is * 1 << (portnum % 64)
*/ #define RDS_CONG_MONITOR_SIZE 64 #define RDS_CONG_MONITOR_BIT(port) (((unsignedint) port) % RDS_CONG_MONITOR_SIZE) #define RDS_CONG_MONITOR_MASK(port) (1ULL << RDS_CONG_MONITOR_BIT(port))
/* * RDMA related types
*/
/* * This encapsulates a remote memory location. * In the current implementation, it contains the R_Key * of the remote memory region, and the offset into it * (so that the application does not have to worry about * alignment).
*/ typedef __u64 rds_rdma_cookie_t;
/* * Common set of flags for all RDMA related structs
*/ #define RDS_RDMA_READWRITE 0x0001 #define RDS_RDMA_FENCE 0x0002 /* use FENCE for immediate send */ #define RDS_RDMA_INVALIDATE 0x0004 /* invalidate R_Key after freeing MR */ #define RDS_RDMA_USE_ONCE 0x0008 /* free MR after use */ #define RDS_RDMA_DONTWAIT 0x0010 /* Don't wait in SET_BARRIER */ #define RDS_RDMA_NOTIFY_ME 0x0020 /* Notify when operation completes */ #define RDS_RDMA_SILENT 0x0040 /* Do not interrupt remote */
#endif/* IB_RDS_H */
Messung V0.5
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet)
¤
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.