diff options
Diffstat (limited to 'net/rds/rdma_transport.c')
| -rw-r--r-- | net/rds/rdma_transport.c | 95 |
1 files changed, 78 insertions, 17 deletions
diff --git a/net/rds/rdma_transport.c b/net/rds/rdma_transport.c index fc59821f0a27..6b0f57c83a2a 100644 --- a/net/rds/rdma_transport.c +++ b/net/rds/rdma_transport.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2009 Oracle. All rights reserved. + * Copyright (c) 2009, 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 @@ -37,10 +37,15 @@ #include "rdma_transport.h" #include "ib.h" +/* Global IPv4 and IPv6 RDS RDMA listener cm_id */ static struct rdma_cm_id *rds_rdma_listen_id; +#if IS_ENABLED(CONFIG_IPV6) +static struct rdma_cm_id *rds6_rdma_listen_id; +#endif -int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id, - struct rdma_cm_event *event) +static int rds_rdma_cm_event_handler_cmn(struct rdma_cm_id *cm_id, + struct rdma_cm_event *event, + bool isv6) { /* this can be null in the listening path */ struct rds_connection *conn = cm_id->context; @@ -72,7 +77,7 @@ int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id, switch (event->event) { case RDMA_CM_EVENT_CONNECT_REQUEST: - ret = trans->cm_handle_connect(cm_id, event); + ret = trans->cm_handle_connect(cm_id, event, isv6); break; case RDMA_CM_EVENT_ADDR_RESOLVED: @@ -90,7 +95,7 @@ int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id, ibic = conn->c_transport_data; if (ibic && ibic->i_cm_id == cm_id) - ret = trans->cm_initiate_connect(cm_id); + ret = trans->cm_initiate_connect(cm_id, isv6); else rds_conn_drop(conn); } @@ -116,14 +121,14 @@ int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id, case RDMA_CM_EVENT_DISCONNECTED: rdsdebug("DISCONNECT event - dropping connection " - "%pI4->%pI4\n", &conn->c_laddr, + "%pI6c->%pI6c\n", &conn->c_laddr, &conn->c_faddr); rds_conn_drop(conn); break; case RDMA_CM_EVENT_TIMEWAIT_EXIT: if (conn) { - pr_info("RDS: RDMA_CM_EVENT_TIMEWAIT_EXIT event: dropping connection %pI4->%pI4\n", + pr_info("RDS: RDMA_CM_EVENT_TIMEWAIT_EXIT event: dropping connection %pI6c->%pI6c\n", &conn->c_laddr, &conn->c_faddr); rds_conn_drop(conn); } @@ -146,13 +151,28 @@ out: return ret; } -static int rds_rdma_listen_init(void) +int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id, + struct rdma_cm_event *event) +{ + return rds_rdma_cm_event_handler_cmn(cm_id, event, false); +} + +#if IS_ENABLED(CONFIG_IPV6) +int rds6_rdma_cm_event_handler(struct rdma_cm_id *cm_id, + struct rdma_cm_event *event) +{ + return rds_rdma_cm_event_handler_cmn(cm_id, event, true); +} +#endif + +static int rds_rdma_listen_init_common(rdma_cm_event_handler handler, + struct sockaddr *sa, + struct rdma_cm_id **ret_cm_id) { - struct sockaddr_in sin; struct rdma_cm_id *cm_id; int ret; - cm_id = rdma_create_id(&init_net, rds_rdma_cm_event_handler, NULL, + cm_id = rdma_create_id(&init_net, handler, NULL, RDMA_PS_TCP, IB_QPT_RC); if (IS_ERR(cm_id)) { ret = PTR_ERR(cm_id); @@ -161,15 +181,11 @@ static int rds_rdma_listen_init(void) return ret; } - sin.sin_family = AF_INET; - sin.sin_addr.s_addr = (__force u32)htonl(INADDR_ANY); - sin.sin_port = (__force u16)htons(RDS_PORT); - /* * XXX I bet this binds the cm_id to a device. If we want to support * fail-over we'll have to take this into consideration. */ - ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin); + ret = rdma_bind_addr(cm_id, sa); if (ret) { printk(KERN_ERR "RDS/RDMA: failed to setup listener, " "rdma_bind_addr() returned %d\n", ret); @@ -185,7 +201,7 @@ static int rds_rdma_listen_init(void) rdsdebug("cm %p listening on port %u\n", cm_id, RDS_PORT); - rds_rdma_listen_id = cm_id; + *ret_cm_id = cm_id; cm_id = NULL; out: if (cm_id) @@ -193,6 +209,45 @@ out: return ret; } +/* Initialize the RDS RDMA listeners. We create two listeners for + * compatibility reason. The one on RDS_PORT is used for IPv4 + * requests only. The one on RDS_CM_PORT is used for IPv6 requests + * only. So only IPv6 enabled RDS module will communicate using this + * port. + */ +static int rds_rdma_listen_init(void) +{ + int ret; +#if IS_ENABLED(CONFIG_IPV6) + struct sockaddr_in6 sin6; +#endif + struct sockaddr_in sin; + + sin.sin_family = PF_INET; + sin.sin_addr.s_addr = htonl(INADDR_ANY); + sin.sin_port = htons(RDS_PORT); + ret = rds_rdma_listen_init_common(rds_rdma_cm_event_handler, + (struct sockaddr *)&sin, + &rds_rdma_listen_id); + if (ret != 0) + return ret; + +#if IS_ENABLED(CONFIG_IPV6) + sin6.sin6_family = PF_INET6; + sin6.sin6_addr = in6addr_any; + sin6.sin6_port = htons(RDS_CM_PORT); + sin6.sin6_scope_id = 0; + sin6.sin6_flowinfo = 0; + ret = rds_rdma_listen_init_common(rds6_rdma_cm_event_handler, + (struct sockaddr *)&sin6, + &rds6_rdma_listen_id); + /* Keep going even when IPv6 is not enabled in the system. */ + if (ret != 0) + rdsdebug("Cannot set up IPv6 RDMA listener\n"); +#endif + return 0; +} + static void rds_rdma_listen_stop(void) { if (rds_rdma_listen_id) { @@ -200,6 +255,13 @@ static void rds_rdma_listen_stop(void) rdma_destroy_id(rds_rdma_listen_id); rds_rdma_listen_id = NULL; } +#if IS_ENABLED(CONFIG_IPV6) + if (rds6_rdma_listen_id) { + rdsdebug("cm %p\n", rds6_rdma_listen_id); + rdma_destroy_id(rds6_rdma_listen_id); + rds6_rdma_listen_id = NULL; + } +#endif } static int rds_rdma_init(void) @@ -229,4 +291,3 @@ module_exit(rds_rdma_exit); MODULE_AUTHOR("Oracle Corporation <rds-devel@oss.oracle.com>"); MODULE_DESCRIPTION("RDS: IB transport"); MODULE_LICENSE("Dual BSD/GPL"); - |