Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * Copyright (c) 2009, 2018 Oracle and/or its affiliates. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * This software is available to you under a choice of one of two
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * licenses.  You may choose to be licensed under the terms of the GNU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * General Public License (GPL) Version 2, available from the file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * COPYING in the main directory of this source tree, or the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * OpenIB.org BSD license below:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *     Redistribution and use in source and binary forms, with or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *     without modification, are permitted provided that the following
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^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *      - Redistributions of source code must retain the above
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *        copyright notice, this list of conditions and the following
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *        disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *      - Redistributions in binary form must reproduce the above
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  *        copyright notice, this list of conditions and the following
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  *        disclaimer in the documentation and/or other materials
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  *        provided with the distribution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * SOFTWARE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include <rdma/rdma_cm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include "rds_single_path.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #include "rdma_transport.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #include "ib.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) /* Global IPv4 and IPv6 RDS RDMA listener cm_id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static struct rdma_cm_id *rds_rdma_listen_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) static struct rdma_cm_id *rds6_rdma_listen_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) /* Per IB specification 7.7.3, service level is a 4-bit field. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #define TOS_TO_SL(tos)		((tos) & 0xF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) static int rds_rdma_cm_event_handler_cmn(struct rdma_cm_id *cm_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 					 struct rdma_cm_event *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 					 bool isv6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	/* this can be null in the listening path */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	struct rds_connection *conn = cm_id->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct rds_transport *trans;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	int *err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	u8 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	rdsdebug("conn %p id %p handling event %u (%s)\n", conn, cm_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		 event->event, rdma_event_msg(event->event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	if (cm_id->device->node_type == RDMA_NODE_IB_CA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		trans = &rds_ib_transport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	/* Prevent shutdown from tearing down the connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	 * while we're executing. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	if (conn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		mutex_lock(&conn->c_cm_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		/* If the connection is being shut down, bail out
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		 * right away. We return 0 so cm_id doesn't get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		 * destroyed prematurely */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		if (rds_conn_state(conn) == RDS_CONN_DISCONNECTING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 			/* Reject incoming connections while we're tearing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			 * down an existing one. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 			if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 				ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	switch (event->event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	case RDMA_CM_EVENT_CONNECT_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		ret = trans->cm_handle_connect(cm_id, event, isv6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	case RDMA_CM_EVENT_ADDR_RESOLVED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		rdma_set_service_type(cm_id, conn->c_tos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		/* XXX do we need to clean up if this fails? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		ret = rdma_resolve_route(cm_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 					 RDS_RDMA_RESOLVE_TIMEOUT_MS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	case RDMA_CM_EVENT_ROUTE_RESOLVED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		/* Connection could have been dropped so make sure the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		 * cm_id is valid before proceeding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		if (conn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 			struct rds_ib_connection *ibic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			ibic = conn->c_transport_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			if (ibic && ibic->i_cm_id == cm_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 				cm_id->route.path_rec[0].sl =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 					TOS_TO_SL(conn->c_tos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 				ret = trans->cm_initiate_connect(cm_id, isv6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 				rds_conn_drop(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	case RDMA_CM_EVENT_ESTABLISHED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		if (conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 			trans->cm_connect_complete(conn, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	case RDMA_CM_EVENT_REJECTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		if (!conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		err = (int *)rdma_consumer_reject_data(cm_id, event, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		if (!err ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		    (err && len >= sizeof(*err) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		     ((*err) <= RDS_RDMA_REJ_INCOMPAT))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			pr_warn("RDS/RDMA: conn <%pI6c, %pI6c> rejected, dropping connection\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 				&conn->c_laddr, &conn->c_faddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			if (!conn->c_tos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 				conn->c_proposed_version = RDS_PROTOCOL_COMPAT_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			rds_conn_drop(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		rdsdebug("Connection rejected: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 			 rdma_reject_msg(cm_id, event->status));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	case RDMA_CM_EVENT_ADDR_ERROR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	case RDMA_CM_EVENT_ROUTE_ERROR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	case RDMA_CM_EVENT_CONNECT_ERROR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	case RDMA_CM_EVENT_UNREACHABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	case RDMA_CM_EVENT_DEVICE_REMOVAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	case RDMA_CM_EVENT_ADDR_CHANGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		if (conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 			rds_conn_drop(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	case RDMA_CM_EVENT_DISCONNECTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		if (!conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		rdsdebug("DISCONNECT event - dropping connection "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			 "%pI6c->%pI6c\n", &conn->c_laddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			 &conn->c_faddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		rds_conn_drop(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	case RDMA_CM_EVENT_TIMEWAIT_EXIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		if (conn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			pr_info("RDS: RDMA_CM_EVENT_TIMEWAIT_EXIT event: dropping connection %pI6c->%pI6c\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 				&conn->c_laddr, &conn->c_faddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			rds_conn_drop(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		/* things like device disconnect? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		printk(KERN_ERR "RDS: unknown event %u (%s)!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		       event->event, rdma_event_msg(event->event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	if (conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		mutex_unlock(&conn->c_cm_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	rdsdebug("id %p event %u (%s) handling ret %d\n", cm_id, event->event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		 rdma_event_msg(event->event), ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			      struct rdma_cm_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	return rds_rdma_cm_event_handler_cmn(cm_id, event, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) int rds6_rdma_cm_event_handler(struct rdma_cm_id *cm_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 			       struct rdma_cm_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	return rds_rdma_cm_event_handler_cmn(cm_id, event, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static int rds_rdma_listen_init_common(rdma_cm_event_handler handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 				       struct sockaddr *sa,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 				       struct rdma_cm_id **ret_cm_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	struct rdma_cm_id *cm_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	cm_id = rdma_create_id(&init_net, handler, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 			       RDMA_PS_TCP, IB_QPT_RC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	if (IS_ERR(cm_id)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		ret = PTR_ERR(cm_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		printk(KERN_ERR "RDS/RDMA: failed to setup listener, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		       "rdma_create_id() returned %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	 * XXX I bet this binds the cm_id to a device.  If we want to support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	 * fail-over we'll have to take this into consideration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	ret = rdma_bind_addr(cm_id, sa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		printk(KERN_ERR "RDS/RDMA: failed to setup listener, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		       "rdma_bind_addr() returned %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	ret = rdma_listen(cm_id, 128);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		printk(KERN_ERR "RDS/RDMA: failed to setup listener, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		       "rdma_listen() returned %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	rdsdebug("cm %p listening on port %u\n", cm_id, RDS_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	*ret_cm_id = cm_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	cm_id = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	if (cm_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		rdma_destroy_id(cm_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* Initialize the RDS RDMA listeners.  We create two listeners for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  * compatibility reason.  The one on RDS_PORT is used for IPv4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)  * requests only.  The one on RDS_CM_PORT is used for IPv6 requests
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)  * only.  So only IPv6 enabled RDS module will communicate using this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)  * port.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static int rds_rdma_listen_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	struct sockaddr_in6 sin6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	struct sockaddr_in sin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	sin.sin_family = PF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	sin.sin_addr.s_addr = htonl(INADDR_ANY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	sin.sin_port = htons(RDS_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	ret = rds_rdma_listen_init_common(rds_rdma_cm_event_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 					  (struct sockaddr *)&sin,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 					  &rds_rdma_listen_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	if (ret != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	sin6.sin6_family = PF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	sin6.sin6_addr = in6addr_any;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	sin6.sin6_port = htons(RDS_CM_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	sin6.sin6_scope_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	sin6.sin6_flowinfo = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	ret = rds_rdma_listen_init_common(rds6_rdma_cm_event_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 					  (struct sockaddr *)&sin6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 					  &rds6_rdma_listen_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	/* Keep going even when IPv6 is not enabled in the system. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	if (ret != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		rdsdebug("Cannot set up IPv6 RDMA listener\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static void rds_rdma_listen_stop(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	if (rds_rdma_listen_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		rdsdebug("cm %p\n", rds_rdma_listen_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		rdma_destroy_id(rds_rdma_listen_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		rds_rdma_listen_id = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	if (rds6_rdma_listen_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		rdsdebug("cm %p\n", rds6_rdma_listen_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		rdma_destroy_id(rds6_rdma_listen_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		rds6_rdma_listen_id = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) static int rds_rdma_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	ret = rds_ib_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	ret = rds_rdma_listen_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		rds_ib_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) module_init(rds_rdma_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) static void rds_rdma_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	/* stop listening first to ensure no new connections are attempted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	rds_rdma_listen_stop();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	rds_ib_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) module_exit(rds_rdma_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) MODULE_AUTHOR("Oracle Corporation <rds-devel@oss.oracle.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) MODULE_DESCRIPTION("RDS: IB transport");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) MODULE_LICENSE("Dual BSD/GPL");