1 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR Linux-OpenIB) */
3 * Copyright (c) 2008, 2018 Oracle and/or its affiliates. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
38 #include <linux/types.h>
39 #include <linux/socket.h> /* For __kernel_sockaddr_storage. */
40 #include <linux/in6.h> /* For struct in6_addr. */
42 #define RDS_IB_ABI_VERSION 0x301
47 * setsockopt/getsockopt for SOL_RDS
49 #define RDS_CANCEL_SENT_TO 1
52 /* deprecated: RDS_BARRIER 4 */
54 #define RDS_CONG_MONITOR 6
55 #define RDS_GET_MR_FOR_DEST 7
56 #define SO_RDS_TRANSPORT 8
58 /* Socket option to tap receive path latency
59 * SO_RDS: SO_RDS_MSG_RXPATH_LATENCY
60 * Format used struct rds_rx_trace_so
62 #define SO_RDS_MSG_RXPATH_LATENCY 10
65 /* supported values for SO_RDS_TRANSPORT */
66 #define RDS_TRANS_IB 0
67 #define RDS_TRANS_IWARP 1
68 #define RDS_TRANS_TCP 2
69 #define RDS_TRANS_COUNT 3
70 #define RDS_TRANS_NONE (~0)
72 /* IOCTLS commands for SOL_RDS */
73 #define SIOCRDSSETTOS (SIOCPROTOPRIVATE)
74 #define SIOCRDSGETTOS (SIOCPROTOPRIVATE + 1)
76 typedef __u8 rds_tos_t;
79 * Control message types for SOL_RDS.
81 * CMSG_RDMA_ARGS (sendmsg)
82 * Request a RDMA transfer to/from the specified
84 * The cmsg_data is a struct rds_rdma_args.
85 * RDS_CMSG_RDMA_DEST (recvmsg, sendmsg)
86 * Kernel informs application about intended
87 * source/destination of a RDMA transfer
88 * RDS_CMSG_RDMA_MAP (sendmsg)
89 * Application asks kernel to map the given
90 * memory range into a IB MR, and send the
91 * R_Key along in an RDS extension header.
92 * The cmsg_data is a struct rds_get_mr_args,
93 * the same as for the GET_MR setsockopt.
94 * RDS_CMSG_RDMA_STATUS (recvmsg)
95 * Returns the status of a completed RDMA operation.
96 * RDS_CMSG_RXPATH_LATENCY(recvmsg)
97 * Returns rds message latencies in various stages of receive
98 * path in nS. Its set per socket using SO_RDS_MSG_RXPATH_LATENCY
99 * socket option. Legitimate points are defined in
100 * enum rds_message_rxpath_latency. More points can be added in
101 * future. CSMG format is struct rds_cmsg_rx_trace.
103 #define RDS_CMSG_RDMA_ARGS 1
104 #define RDS_CMSG_RDMA_DEST 2
105 #define RDS_CMSG_RDMA_MAP 3
106 #define RDS_CMSG_RDMA_STATUS 4
107 #define RDS_CMSG_CONG_UPDATE 5
108 #define RDS_CMSG_ATOMIC_FADD 6
109 #define RDS_CMSG_ATOMIC_CSWP 7
110 #define RDS_CMSG_MASKED_ATOMIC_FADD 8
111 #define RDS_CMSG_MASKED_ATOMIC_CSWP 9
112 #define RDS_CMSG_RXPATH_LATENCY 11
113 #define RDS_CMSG_ZCOPY_COOKIE 12
114 #define RDS_CMSG_ZCOPY_COMPLETION 13
116 #define RDS_INFO_FIRST 10000
117 #define RDS_INFO_COUNTERS 10000
118 #define RDS_INFO_CONNECTIONS 10001
119 /* 10002 aka RDS_INFO_FLOWS is deprecated */
120 #define RDS_INFO_SEND_MESSAGES 10003
121 #define RDS_INFO_RETRANS_MESSAGES 10004
122 #define RDS_INFO_RECV_MESSAGES 10005
123 #define RDS_INFO_SOCKETS 10006
124 #define RDS_INFO_TCP_SOCKETS 10007
125 #define RDS_INFO_IB_CONNECTIONS 10008
126 #define RDS_INFO_CONNECTION_STATS 10009
127 #define RDS_INFO_IWARP_CONNECTIONS 10010
129 /* PF_RDS6 options */
130 #define RDS6_INFO_CONNECTIONS 10011
131 #define RDS6_INFO_SEND_MESSAGES 10012
132 #define RDS6_INFO_RETRANS_MESSAGES 10013
133 #define RDS6_INFO_RECV_MESSAGES 10014
134 #define RDS6_INFO_SOCKETS 10015
135 #define RDS6_INFO_TCP_SOCKETS 10016
136 #define RDS6_INFO_IB_CONNECTIONS 10017
138 #define RDS_INFO_LAST 10017
140 struct rds_info_counter {
143 } __attribute__((packed));
145 #define RDS_INFO_CONNECTION_FLAG_SENDING 0x01
146 #define RDS_INFO_CONNECTION_FLAG_CONNECTING 0x02
147 #define RDS_INFO_CONNECTION_FLAG_CONNECTED 0x04
149 #define TRANSNAMSIZ 16
151 struct rds_info_connection {
156 __u8 transport[TRANSNAMSIZ]; /* null term ascii */
159 } __attribute__((packed));
161 struct rds6_info_connection {
164 struct in6_addr laddr;
165 struct in6_addr faddr;
166 __u8 transport[TRANSNAMSIZ]; /* null term ascii */
168 } __attribute__((packed));
170 #define RDS_INFO_MESSAGE_FLAG_ACK 0x01
171 #define RDS_INFO_MESSAGE_FLAG_FAST_ACK 0x02
173 struct rds_info_message {
182 } __attribute__((packed));
184 struct rds6_info_message {
187 struct in6_addr laddr;
188 struct in6_addr faddr;
193 } __attribute__((packed));
195 struct rds_info_socket {
198 __be32 connected_addr;
200 __be16 connected_port;
203 } __attribute__((packed));
205 struct rds6_info_socket {
207 struct in6_addr bound_addr;
208 struct in6_addr connected_addr;
210 __be16 connected_port;
213 } __attribute__((packed));
215 struct rds_info_tcp_socket {
223 __u32 last_expected_una;
226 } __attribute__((packed));
228 struct rds6_info_tcp_socket {
229 struct in6_addr local_addr;
231 struct in6_addr peer_addr;
236 __u32 last_expected_una;
238 } __attribute__((packed));
240 #define RDS_IB_GID_LEN 16
241 struct rds_info_rdma_connection {
244 __u8 src_gid[RDS_IB_GID_LEN];
245 __u8 dst_gid[RDS_IB_GID_LEN];
255 struct rds6_info_rdma_connection {
256 struct in6_addr src_addr;
257 struct in6_addr dst_addr;
258 __u8 src_gid[RDS_IB_GID_LEN];
259 __u8 dst_gid[RDS_IB_GID_LEN];
269 /* RDS message Receive Path Latency points */
270 enum rds_message_rxpath_latency {
271 RDS_MSG_RX_HDR_TO_DGRAM_START = 0,
272 RDS_MSG_RX_DGRAM_REASSEMBLE,
273 RDS_MSG_RX_DGRAM_DELIVERED,
274 RDS_MSG_RX_DGRAM_TRACE_MAX
277 struct rds_rx_trace_so {
279 __u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX];
282 struct rds_cmsg_rx_trace {
284 __u8 rx_trace_pos[RDS_MSG_RX_DGRAM_TRACE_MAX];
285 __u64 rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX];
289 * Congestion monitoring.
290 * Congestion control in RDS happens at the host connection
291 * level by exchanging a bitmap marking congested ports.
292 * By default, a process sleeping in poll() is always woken
293 * up when the congestion map is updated.
294 * With explicit monitoring, an application can have more
295 * fine-grained control.
296 * The application installs a 64bit mask value in the socket,
297 * where each bit corresponds to a group of ports.
298 * When a congestion update arrives, RDS checks the set of
299 * ports that are now uncongested against the list bit mask
300 * installed in the socket, and if they overlap, we queue a
301 * cong_notification on the socket.
303 * To install the congestion monitor bitmask, use RDS_CONG_MONITOR
304 * with the 64bit mask.
305 * Congestion updates are received via RDS_CMSG_CONG_UPDATE
308 * The correspondence between bits and ports is
309 * 1 << (portnum % 64)
311 #define RDS_CONG_MONITOR_SIZE 64
312 #define RDS_CONG_MONITOR_BIT(port) (((unsigned int) port) % RDS_CONG_MONITOR_SIZE)
313 #define RDS_CONG_MONITOR_MASK(port) (1ULL << RDS_CONG_MONITOR_BIT(port))
320 * This encapsulates a remote memory location.
321 * In the current implementation, it contains the R_Key
322 * of the remote memory region, and the offset into it
323 * (so that the application does not have to worry about
326 typedef __u64 rds_rdma_cookie_t;
333 struct rds_get_mr_args {
334 struct rds_iovec vec;
339 struct rds_get_mr_for_dest_args {
340 struct __kernel_sockaddr_storage dest_addr;
341 struct rds_iovec vec;
346 struct rds_free_mr_args {
347 rds_rdma_cookie_t cookie;
351 struct rds_rdma_args {
352 rds_rdma_cookie_t cookie;
353 struct rds_iovec remote_vec;
354 __u64 local_vec_addr;
360 struct rds_atomic_args {
361 rds_rdma_cookie_t cookie;
387 struct rds_rdma_notify {
392 #define RDS_RDMA_SUCCESS 0
393 #define RDS_RDMA_REMOTE_ERROR 1
394 #define RDS_RDMA_CANCELED 2
395 #define RDS_RDMA_DROPPED 3
396 #define RDS_RDMA_OTHER_ERROR 4
398 #define RDS_MAX_ZCOOKIES 8
399 struct rds_zcopy_cookies {
401 __u32 cookies[RDS_MAX_ZCOOKIES];
405 * Common set of flags for all RDMA related structs
407 #define RDS_RDMA_READWRITE 0x0001
408 #define RDS_RDMA_FENCE 0x0002 /* use FENCE for immediate send */
409 #define RDS_RDMA_INVALIDATE 0x0004 /* invalidate R_Key after freeing MR */
410 #define RDS_RDMA_USE_ONCE 0x0008 /* free MR after use */
411 #define RDS_RDMA_DONTWAIT 0x0010 /* Don't wait in SET_BARRIER */
412 #define RDS_RDMA_NOTIFY_ME 0x0020 /* Notify when operation completes */
413 #define RDS_RDMA_SILENT 0x0040 /* Do not interrupt remote */
415 #endif /* IB_RDS_H */