diff options
| author | Ka-Cheong Poon <ka-cheong.poon@oracle.com> | 2018-07-24 06:51:22 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-07-24 07:17:44 +0300 |
| commit | 1e2b44e78eead7bcadfbf96f70d95773191541c9 (patch) | |
| tree | e7944339dd957ae23cfd690cb0ad6962d98c053c /net/rds/rdma_transport.c | |
| parent | eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 (diff) | |
| download | linux-1e2b44e78eead7bcadfbf96f70d95773191541c9.tar.xz | |
rds: Enable RDS IPv6 support
This patch enables RDS to use IPv6 addresses. For RDS/TCP, the
listener is now an IPv6 endpoint which accepts both IPv4 and IPv6
connection requests. RDS/RDMA/IB uses a private data (struct
rds_ib_connect_private) exchange between endpoints at RDS connection
establishment time to support RDMA. This private data exchange uses a
32 bit integer to represent an IP address. This needs to be changed in
order to support IPv6. A new private data struct
rds6_ib_connect_private is introduced to handle this. To ensure
backward compatibility, an IPv6 capable RDS stack uses another RDMA
listener port (RDS_CM_PORT) to accept IPv6 connection. And it
continues to use the original RDS_PORT for IPv4 RDS connections. When
it needs to communicate with an IPv6 peer, it uses the RDS_CM_PORT to
send the connection set up request.
v5: Fixed syntax problem (David Miller).
v4: Changed port history comments in rds.h (Sowmini Varadhan).
v3: Added support to set up IPv4 connection using mapped address
(David Miller).
Added support to set up connection between link local and non-link
addresses.
Various review comments from Santosh Shilimkar and Sowmini Varadhan.
v2: Fixed bound and peer address scope mismatched issue.
Added back rds_connect() IPv6 changes.
Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/rdma_transport.c')
| -rw-r--r-- | net/rds/rdma_transport.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/net/rds/rdma_transport.c b/net/rds/rdma_transport.c index f49abef69550..bd67e55354f4 100644 --- a/net/rds/rdma_transport.c +++ b/net/rds/rdma_transport.c @@ -37,7 +37,9 @@ #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; +static struct rdma_cm_id *rds6_rdma_listen_id; static int rds_rdma_cm_event_handler_cmn(struct rdma_cm_id *cm_id, struct rdma_cm_event *event, @@ -153,6 +155,12 @@ int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id, return rds_rdma_cm_event_handler_cmn(cm_id, event, false); } +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); +} + static int rds_rdma_listen_init_common(rdma_cm_event_handler handler, struct sockaddr *sa, struct rdma_cm_id **ret_cm_id) @@ -206,6 +214,7 @@ out: static int rds_rdma_listen_init(void) { int ret; + struct sockaddr_in6 sin6; struct sockaddr_in sin; sin.sin_family = PF_INET; @@ -214,7 +223,21 @@ static int rds_rdma_listen_init(void) ret = rds_rdma_listen_init_common(rds_rdma_cm_event_handler, (struct sockaddr *)&sin, &rds_rdma_listen_id); - return ret; + if (ret != 0) + return ret; + + 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"); + return 0; } static void rds_rdma_listen_stop(void) @@ -224,6 +247,11 @@ static void rds_rdma_listen_stop(void) rdma_destroy_id(rds_rdma_listen_id); rds_rdma_listen_id = NULL; } + 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; + } } static int rds_rdma_init(void) |