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>
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _RDS_TCP_H
|
|
#define _RDS_TCP_H
|
|
|
|
#define RDS_TCP_PORT 16385
|
|
|
|
struct rds_tcp_incoming {
|
|
struct rds_incoming ti_inc;
|
|
struct sk_buff_head ti_skb_list;
|
|
};
|
|
|
|
struct rds_tcp_connection {
|
|
|
|
struct list_head t_tcp_node;
|
|
bool t_tcp_node_detached;
|
|
struct rds_conn_path *t_cpath;
|
|
/* t_conn_path_lock synchronizes the connection establishment between
|
|
* rds_tcp_accept_one and rds_tcp_conn_path_connect
|
|
*/
|
|
struct mutex t_conn_path_lock;
|
|
struct socket *t_sock;
|
|
void *t_orig_write_space;
|
|
void *t_orig_data_ready;
|
|
void *t_orig_state_change;
|
|
|
|
struct rds_tcp_incoming *t_tinc;
|
|
size_t t_tinc_hdr_rem;
|
|
size_t t_tinc_data_rem;
|
|
|
|
/* XXX error report? */
|
|
struct work_struct t_conn_w;
|
|
struct work_struct t_send_w;
|
|
struct work_struct t_down_w;
|
|
struct work_struct t_recv_w;
|
|
|
|
/* for info exporting only */
|
|
struct list_head t_list_item;
|
|
u32 t_last_sent_nxt;
|
|
u32 t_last_expected_una;
|
|
u32 t_last_seen_una;
|
|
};
|
|
|
|
struct rds_tcp_statistics {
|
|
uint64_t s_tcp_data_ready_calls;
|
|
uint64_t s_tcp_write_space_calls;
|
|
uint64_t s_tcp_sndbuf_full;
|
|
uint64_t s_tcp_connect_raced;
|
|
uint64_t s_tcp_listen_closed_stale;
|
|
};
|
|
|
|
/* tcp.c */
|
|
void rds_tcp_tune(struct socket *sock);
|
|
void rds_tcp_nonagle(struct socket *sock);
|
|
void rds_tcp_set_callbacks(struct socket *sock, struct rds_conn_path *cp);
|
|
void rds_tcp_reset_callbacks(struct socket *sock, struct rds_conn_path *cp);
|
|
void rds_tcp_restore_callbacks(struct socket *sock,
|
|
struct rds_tcp_connection *tc);
|
|
u32 rds_tcp_write_seq(struct rds_tcp_connection *tc);
|
|
u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
|
|
u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
|
|
extern struct rds_transport rds_tcp_transport;
|
|
void rds_tcp_accept_work(struct sock *sk);
|
|
|
|
/* tcp_connect.c */
|
|
int rds_tcp_conn_path_connect(struct rds_conn_path *cp);
|
|
void rds_tcp_conn_path_shutdown(struct rds_conn_path *conn);
|
|
void rds_tcp_state_change(struct sock *sk);
|
|
|
|
/* tcp_listen.c */
|
|
struct socket *rds_tcp_listen_init(struct net *net, bool isv6);
|
|
void rds_tcp_listen_stop(struct socket *sock, struct work_struct *acceptor);
|
|
void rds_tcp_listen_data_ready(struct sock *sk);
|
|
int rds_tcp_accept_one(struct socket *sock);
|
|
int rds_tcp_keepalive(struct socket *sock);
|
|
void *rds_tcp_listen_sock_def_readable(struct net *net);
|
|
void rds_tcp_set_linger(struct socket *sock);
|
|
|
|
/* tcp_recv.c */
|
|
int rds_tcp_recv_init(void);
|
|
void rds_tcp_recv_exit(void);
|
|
void rds_tcp_data_ready(struct sock *sk);
|
|
int rds_tcp_recv_path(struct rds_conn_path *cp);
|
|
void rds_tcp_inc_free(struct rds_incoming *inc);
|
|
int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to);
|
|
|
|
/* tcp_send.c */
|
|
void rds_tcp_xmit_path_prepare(struct rds_conn_path *cp);
|
|
void rds_tcp_xmit_path_complete(struct rds_conn_path *cp);
|
|
int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
|
|
unsigned int hdr_off, unsigned int sg, unsigned int off);
|
|
void rds_tcp_write_space(struct sock *sk);
|
|
|
|
/* tcp_stats.c */
|
|
DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);
|
|
#define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)
|
|
unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
|
|
unsigned int avail);
|
|
|
|
#endif
|