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SUNRPC: Allow specification of TCP client connect timeout at setup

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When we create a TCP transport, the connect timeout parameters are
currently fixed to be 90s. This is problematic in the pNFS flexfiles
case, where we may have multiple mirrors, and we would like to fail over
quickly to the next mirror if a data server is down.

This patch adds the ability to specify the connection parameters at RPC
client creation time.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Trond Myklebust 2023-08-19 17:32:23 -04:00 committed by Anna Schumaker
parent 3e6ff89d2e
commit d2ee413884
4 changed files with 11 additions and 2 deletions
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2
include/linux/sunrpc/clnt.h
View File

@ -148,6 +148,8 @@ struct rpc_create_args {
const struct cred *cred;
unsigned int max_connect;
struct xprtsec_parms xprtsec;
unsigned long connect_timeout;
unsigned long reconnect_timeout;
};
struct rpc_add_xprt_test {

2
include/linux/sunrpc/xprt.h
View File

@ -351,6 +351,8 @@ struct xprt_create {
struct rpc_xprt_switch *bc_xps;
unsigned int flags;
struct xprtsec_parms xprtsec;
unsigned long connect_timeout;
unsigned long reconnect_timeout;
};
struct xprt_class {

2
net/sunrpc/clnt.c
View File

@ -534,6 +534,8 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
.servername = args->servername,
.bc_xprt = args->bc_xprt,
.xprtsec = args->xprtsec,
.connect_timeout = args->connect_timeout,
.reconnect_timeout = args->reconnect_timeout,
};
char servername[48];
struct rpc_clnt *clnt;

7
net/sunrpc/xprtsock.c
View File

@ -2290,8 +2290,6 @@ static void xs_tcp_set_connect_timeout(struct rpc_xprt *xprt,
unsigned long reconnect_timeout)
{
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
struct rpc_timeout to;
unsigned long initval;
spin_lock(&xprt->transport_lock);
if (reconnect_timeout < xprt->max_reconnect_timeout)
@ -3350,8 +3348,13 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args)
xprt->timeout = &xs_tcp_default_timeout;
xprt->max_reconnect_timeout = xprt->timeout->to_maxval;
if (args->reconnect_timeout)
xprt->max_reconnect_timeout = args->reconnect_timeout;
xprt->connect_timeout = xprt->timeout->to_initval *
(xprt->timeout->to_retries + 1);
if (args->connect_timeout)
xs_tcp_do_set_connect_timeout(xprt, args->connect_timeout);
INIT_WORK(&transport->recv_worker, xs_stream_data_receive_workfn);
INIT_WORK(&transport->error_worker, xs_error_handle);