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rds: Changing IP address internal representation to struct in6_addr

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This patch changes the internal representation of an IP address to use
struct in6_addr.  IPv4 address is stored as an IPv4 mapped address.
All the functions which take an IP address as argument are also
changed to use struct in6_addr.  But RDS socket layer is not modified
such that it still does not accept IPv6 address from an application.
And RDS layer does not accept nor initiate IPv6 connections.

v2: Fixed sparse warnings.

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>
This commit is contained in:
Ka-Cheong Poon
2018-07-23 20:51:21 -07:00
committed by David S. Miller
parent a6c90dd321
commit eee2fa6ab3
23 changed files with 864 additions and 370 deletions
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51
net/rds/ib.h
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@@ -57,16 +57,44 @@ struct rds_ib_refill_cache {
struct list_head *ready;
};
/* This is the common structure for the IB private data exchange in setting up
* an RDS connection. The exchange is different for IPv4 and IPv6 connections.
* The reason is that the address size is different and the addresses
* exchanged are in the beginning of the structure. Hence it is not possible
* for interoperability if same structure is used.
*/
struct rds_ib_conn_priv_cmn {
u8 ricpc_protocol_major;
u8 ricpc_protocol_minor;
__be16 ricpc_protocol_minor_mask; /* bitmask */
__be32 ricpc_reserved1;
__be64 ricpc_ack_seq;
__be32 ricpc_credit; /* non-zero enables flow ctl */
};
struct rds_ib_connect_private {
/* Add new fields at the end, and don't permute existing fields. */
__be32 dp_saddr;
__be32 dp_daddr;
u8 dp_protocol_major;
u8 dp_protocol_minor;
__be16 dp_protocol_minor_mask; /* bitmask */
__be32 dp_reserved1;
__be64 dp_ack_seq;
__be32 dp_credit; /* non-zero enables flow ctl */
__be32 dp_saddr;
__be32 dp_daddr;
struct rds_ib_conn_priv_cmn dp_cmn;
};
struct rds6_ib_connect_private {
/* Add new fields at the end, and don't permute existing fields. */
struct in6_addr dp_saddr;
struct in6_addr dp_daddr;
struct rds_ib_conn_priv_cmn dp_cmn;
};
#define dp_protocol_major dp_cmn.ricpc_protocol_major
#define dp_protocol_minor dp_cmn.ricpc_protocol_minor
#define dp_protocol_minor_mask dp_cmn.ricpc_protocol_minor_mask
#define dp_ack_seq dp_cmn.ricpc_ack_seq
#define dp_credit dp_cmn.ricpc_credit
union rds_ib_conn_priv {
struct rds_ib_connect_private ricp_v4;
struct rds6_ib_connect_private ricp_v6;
};
struct rds_ib_send_work {
@@ -351,8 +379,8 @@ void rds_ib_listen_stop(void);
__printf(2, 3)
void __rds_ib_conn_error(struct rds_connection *conn, const char *, ...);
int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id,
struct rdma_cm_event *event);
int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id);
struct rdma_cm_event *event, bool isv6);
int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id, bool isv6);
void rds_ib_cm_connect_complete(struct rds_connection *conn,
struct rdma_cm_event *event);
@@ -361,7 +389,8 @@ void rds_ib_cm_connect_complete(struct rds_connection *conn,
__rds_ib_conn_error(conn, KERN_WARNING "RDS/IB: " fmt)
/* ib_rdma.c */
int rds_ib_update_ipaddr(struct rds_ib_device *rds_ibdev, __be32 ipaddr);
int rds_ib_update_ipaddr(struct rds_ib_device *rds_ibdev,
struct in6_addr *ipaddr);
void rds_ib_add_conn(struct rds_ib_device *rds_ibdev, struct rds_connection *conn);
void rds_ib_remove_conn(struct rds_ib_device *rds_ibdev, struct rds_connection *conn);
void rds_ib_destroy_nodev_conns(void);