1e2b44e78e
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>
25 lines
654 B
C
25 lines
654 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _RDMA_TRANSPORT_H
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#define _RDMA_TRANSPORT_H
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#include <rdma/ib_verbs.h>
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#include <rdma/rdma_cm.h>
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#include "rds.h"
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/* RDMA_CM also uses 16385 as the listener port. */
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#define RDS_CM_PORT 16385
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#define RDS_RDMA_RESOLVE_TIMEOUT_MS 5000
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int rds_rdma_conn_connect(struct rds_connection *conn);
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int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id,
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struct rdma_cm_event *event);
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int rds6_rdma_cm_event_handler(struct rdma_cm_id *cm_id,
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struct rdma_cm_event *event);
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/* from ib.c */
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extern struct rds_transport rds_ib_transport;
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int rds_ib_init(void);
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void rds_ib_exit(void);
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#endif
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