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RDS: TCP: make receive path use the rds_conn_path

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The ->sk_user_data contains a pointer to the rds_conn_path
for the socket. Use this consistently in the rds_tcp_data_ready
callbacks to get the rds_conn_path for rds_recv_incoming.

Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sowmini Varadhan 2016-06-30 16:11:15 -07:00 committed by David S. Miller
parent ea3b1ea539
commit 2da43c4a1b
9 changed files with 26 additions and 22 deletions
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2
net/rds/ib.c
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@ -385,7 +385,7 @@ struct rds_transport rds_ib_transport = {
.xmit = rds_ib_xmit,
.xmit_rdma = rds_ib_xmit_rdma,
.xmit_atomic = rds_ib_xmit_atomic,
.recv = rds_ib_recv,
.recv_path = rds_ib_recv_path,
.conn_alloc = rds_ib_conn_alloc,
.conn_free = rds_ib_conn_free,
.conn_connect = rds_ib_conn_connect,

2
net/rds/ib.h
View File

@ -354,7 +354,7 @@ void rds_ib_mr_cqe_handler(struct rds_ib_connection *ic, struct ib_wc *wc);
/* ib_recv.c */
int rds_ib_recv_init(void);
void rds_ib_recv_exit(void);
int rds_ib_recv(struct rds_connection *conn);
int rds_ib_recv_path(struct rds_conn_path *conn);
int rds_ib_recv_alloc_caches(struct rds_ib_connection *ic);
void rds_ib_recv_free_caches(struct rds_ib_connection *ic);
void rds_ib_recv_refill(struct rds_connection *conn, int prefill, gfp_t gfp);

3
net/rds/ib_recv.c
View File

@ -1009,8 +1009,9 @@ void rds_ib_recv_cqe_handler(struct rds_ib_connection *ic,
rds_ib_recv_refill(conn, 0, GFP_NOWAIT);
}
int rds_ib_recv(struct rds_connection *conn)
int rds_ib_recv_path(struct rds_conn_path *cp)
{
struct rds_connection *conn = cp->cp_conn;
struct rds_ib_connection *ic = conn->c_transport_data;
int ret = 0;

4
net/rds/loop.c
View File

@ -102,7 +102,7 @@ static void rds_loop_inc_free(struct rds_incoming *inc)
}
/* we need to at least give the thread something to succeed */
static int rds_loop_recv(struct rds_connection *conn)
static int rds_loop_recv_path(struct rds_conn_path *cp)
{
return 0;
}
@ -185,7 +185,7 @@ void rds_loop_exit(void)
*/
struct rds_transport rds_loop_transport = {
.xmit = rds_loop_xmit,
.recv = rds_loop_recv,
.recv_path = rds_loop_recv_path,
.conn_alloc = rds_loop_conn_alloc,
.conn_free = rds_loop_conn_free,
.conn_connect = rds_loop_conn_connect,

2
net/rds/rds.h
View File

@ -462,7 +462,7 @@ struct rds_transport {
unsigned int hdr_off, unsigned int sg, unsigned int off);
int (*xmit_rdma)(struct rds_connection *conn, struct rm_rdma_op *op);
int (*xmit_atomic)(struct rds_connection *conn, struct rm_atomic_op *op);
int (*recv)(struct rds_connection *conn);
int (*recv_path)(struct rds_conn_path *cp);
int (*inc_copy_to_user)(struct rds_incoming *inc, struct iov_iter *to);
void (*inc_free)(struct rds_incoming *inc);

2
net/rds/tcp.c
View File

@ -359,7 +359,7 @@ struct rds_transport rds_tcp_transport = {
.xmit_path_prepare = rds_tcp_xmit_path_prepare,
.xmit_path_complete = rds_tcp_xmit_path_complete,
.xmit = rds_tcp_xmit,
.recv = rds_tcp_recv,
.recv_path = rds_tcp_recv_path,
.conn_alloc = rds_tcp_conn_alloc,
.conn_free = rds_tcp_conn_free,
.conn_connect = rds_tcp_conn_connect,

2
net/rds/tcp.h
View File

@ -75,7 +75,7 @@ int rds_tcp_keepalive(struct socket *sock);
int rds_tcp_recv_init(void);
void rds_tcp_recv_exit(void);
void rds_tcp_data_ready(struct sock *sk);
int rds_tcp_recv(struct rds_connection *conn);
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);

29
net/rds/tcp_recv.c
View File

@ -34,7 +34,6 @@
#include <linux/slab.h>
#include <net/tcp.h>
#include "rds_single_path.h"
#include "rds.h"
#include "tcp.h"
@ -148,7 +147,7 @@ static void rds_tcp_cong_recv(struct rds_connection *conn,
}
struct rds_tcp_desc_arg {
struct rds_connection *conn;
struct rds_conn_path *conn_path;
gfp_t gfp;
};
@ -156,8 +155,8 @@ static int rds_tcp_data_recv(read_descriptor_t *desc, struct sk_buff *skb,
unsigned int offset, size_t len)
{
struct rds_tcp_desc_arg *arg = desc->arg.data;
struct rds_connection *conn = arg->conn;
struct rds_tcp_connection *tc = conn->c_transport_data;
struct rds_conn_path *cp = arg->conn_path;
struct rds_tcp_connection *tc = cp->cp_transport_data;
struct rds_tcp_incoming *tinc = tc->t_tinc;
struct sk_buff *clone;
size_t left = len, to_copy;
@ -179,7 +178,8 @@ static int rds_tcp_data_recv(read_descriptor_t *desc, struct sk_buff *skb,
}
tc->t_tinc = tinc;
rdsdebug("alloced tinc %p\n", tinc);
rds_inc_init(&tinc->ti_inc, conn, conn->c_faddr);
rds_inc_path_init(&tinc->ti_inc, cp,
cp->cp_conn->c_faddr);
/*
* XXX * we might be able to use the __ variants when
* we've already serialized at a higher level.
@ -229,6 +229,8 @@ static int rds_tcp_data_recv(read_descriptor_t *desc, struct sk_buff *skb,
}
if (tc->t_tinc_hdr_rem == 0 && tc->t_tinc_data_rem == 0) {
struct rds_connection *conn = cp->cp_conn;
if (tinc->ti_inc.i_hdr.h_flags == RDS_FLAG_CONG_BITMAP)
rds_tcp_cong_recv(conn, tinc);
else
@ -251,15 +253,15 @@ out:
}
/* the caller has to hold the sock lock */
static int rds_tcp_read_sock(struct rds_connection *conn, gfp_t gfp)
static int rds_tcp_read_sock(struct rds_conn_path *cp, gfp_t gfp)
{
struct rds_tcp_connection *tc = conn->c_transport_data;
struct rds_tcp_connection *tc = cp->cp_transport_data;
struct socket *sock = tc->t_sock;
read_descriptor_t desc;
struct rds_tcp_desc_arg arg;
/* It's like glib in the kernel! */
arg.conn = conn;
arg.conn_path = cp;
arg.gfp = gfp;
desc.arg.data = &arg;
desc.error = 0;
@ -279,16 +281,17 @@ static int rds_tcp_read_sock(struct rds_connection *conn, gfp_t gfp)
* if we fail to allocate we're in trouble.. blindly wait some time before
* trying again to see if the VM can free up something for us.
*/
int rds_tcp_recv(struct rds_connection *conn)
int rds_tcp_recv_path(struct rds_conn_path *cp)
{
struct rds_tcp_connection *tc = conn->c_transport_data;
struct rds_tcp_connection *tc = cp->cp_transport_data;
struct socket *sock = tc->t_sock;
int ret = 0;
rdsdebug("recv worker conn %p tc %p sock %p\n", conn, tc, sock);
rdsdebug("recv worker path [%d] tc %p sock %p\n",
cp->cp_index, tc, sock);
lock_sock(sock->sk);
ret = rds_tcp_read_sock(conn, GFP_KERNEL);
ret = rds_tcp_read_sock(cp, GFP_KERNEL);
release_sock(sock->sk);
return ret;
@ -313,7 +316,7 @@ void rds_tcp_data_ready(struct sock *sk)
ready = tc->t_orig_data_ready;
rds_tcp_stats_inc(s_tcp_data_ready_calls);
if (rds_tcp_read_sock(cp->cp_conn, GFP_ATOMIC) == -ENOMEM)
if (rds_tcp_read_sock(cp, GFP_ATOMIC) == -ENOMEM)
queue_delayed_work(rds_wq, &cp->cp_recv_w, 0);
out:
read_unlock_bh(&sk->sk_callback_lock);

2
net/rds/threads.c
View File

@ -203,7 +203,7 @@ void rds_recv_worker(struct work_struct *work)
int ret;
if (rds_conn_path_state(cp) == RDS_CONN_UP) {
ret = cp->cp_conn->c_trans->recv(cp->cp_conn);
ret = cp->cp_conn->c_trans->recv_path(cp);
rdsdebug("conn %p ret %d\n", cp->cp_conn, ret);
switch (ret) {
case -EAGAIN: