Instead of trying (and failing) to predict how much writeable socket space
will be available to the RPC call, just fall back to the simple model of
deferring processing until the socket is uncongested.
If a limit is neeeded, then set the hard per-connection limit.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
net/sunrpc/svcsock.c | 47 ++++-------------------------------------------
1 file changed, 4 insertions(+), 43 deletions(-)
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 338d6fe1103d..bc3ef0734f2f 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -431,43 +431,11 @@ static void svc_write_space(struct sock *sk)
static int svc_tcp_has_wspace(struct svc_xprt *xprt)
{
- struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
- struct svc_serv *serv = svsk->sk_xprt.xpt_server;
- int required;
+ struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
if (test_bit(XPT_LISTENER, &xprt->xpt_flags))
return 1;
- required = atomic_read(&xprt->xpt_reserved) + serv->sv_max_mesg;
- if (sk_stream_wspace(svsk->sk_sk) >= required ||
- (sk_stream_min_wspace(svsk->sk_sk) == 0 &&
- atomic_read(&xprt->xpt_reserved) == 0))
- return 1;
- set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
- return 0;
-}
-
-static void svc_tcp_write_space(struct sock *sk)
-{
- struct svc_sock *svsk = (struct svc_sock *)(sk->sk_user_data);
- struct socket *sock = sk->sk_socket;
-
- if (!svsk)
- return;
-
- if (!sk_stream_is_writeable(sk) || !sock)
- return;
- if (svc_tcp_has_wspace(&svsk->sk_xprt)) {
- clear_bit(SOCK_NOSPACE, &sock->flags);
- svc_write_space(sk);
- }
-}
-
-static void svc_tcp_adjust_wspace(struct svc_xprt *xprt)
-{
- struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
-
- if (svc_tcp_has_wspace(xprt))
- clear_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
+ return !test_bit(SOCK_NOSPACE, &svsk->sk_sock->flags);
}
/*
@@ -1272,7 +1240,6 @@ static struct svc_xprt_ops svc_tcp_ops = {
.xpo_has_wspace = svc_tcp_has_wspace,
.xpo_accept = svc_tcp_accept,
.xpo_secure_port = svc_sock_secure_port,
- .xpo_adjust_wspace = svc_tcp_adjust_wspace,
};
static struct svc_xprt_class svc_tcp_class = {
@@ -1313,7 +1280,7 @@ static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv)
dprintk("setting up TCP socket for reading\n");
sk->sk_state_change = svc_tcp_state_change;
sk->sk_data_ready = svc_data_ready;
- sk->sk_write_space = svc_tcp_write_space;
+ sk->sk_write_space = svc_write_space;
svsk->sk_reclen = 0;
svsk->sk_tcplen = 0;
@@ -1383,14 +1350,8 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
/* Initialize the socket */
if (sock->type == SOCK_DGRAM)
svc_udp_init(svsk, serv);
- else {
- /* initialise setting must have enough space to
- * receive and respond to one request.
- */
- svc_sock_setbufsize(svsk->sk_sock, 4 * serv->sv_max_mesg,
- 4 * serv->sv_max_mesg);
+ else
svc_tcp_init(svsk, serv);
- }
dprintk("svc: svc_setup_socket created %p (inet %p)\n",
svsk, svsk->sk_sk);
--
2.7.4
--
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