/**
* xs_setup_udp - Set up transport to use a UDP socket
* @xprt: transport to set up
* @to: timeout parameters
*
*/
int xs_setup_udp(struct rpc_xprt *xprt, struct rpc_timeout *to)
{
size_t slot_table_size;
dprintk("RPC: setting up udp-ipv4 transport...\n");
xprt->max_reqs = xprt_udp_slot_table_entries;
slot_table_size = xprt->max_reqs * sizeof(xprt->slot[0]);
xprt->slot = kzalloc(slot_table_size, GFP_KERNEL);
if (xprt->slot == NULL)
return -ENOMEM;
xprt->prot = IPPROTO_UDP;
xprt->port = xs_get_random_port();
xprt->tsh_size = 0;
xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0;
/* XXX: header size can vary due to auth type, IPv6, etc. */
xprt->max_payload = (1U << 16) - (MAX_HEADER << 3);
INIT_WORK(&xprt->connect_worker, xs_udp_connect_worker, xprt);
xprt->bind_timeout = XS_BIND_TO;
xprt->connect_timeout = XS_UDP_CONN_TO;
xprt->reestablish_timeout = XS_UDP_REEST_TO;
xprt->idle_timeout = XS_IDLE_DISC_TO;
xprt->ops = &xs_udp_ops;
if (to)
xprt->timeout = *to;
else
xprt_set_timeout(&xprt->timeout, 5, 5 * HZ);
return 0;
}
/**
* xs_setup_tcp - Set up transport to use a TCP socket
* @xprt: transport to set up
* @to: timeout parameters
*
*/
int xs_setup_tcp(struct rpc_xprt *xprt, struct rpc_timeout *to)
{
size_t slot_table_size;
dprintk("RPC: setting up tcp-ipv4 transport...\n");
xprt->max_reqs = xprt_tcp_slot_table_entries;
slot_table_size = xprt->max_reqs * sizeof(xprt->slot[0]);
xprt->slot = kzalloc(slot_table_size, GFP_KERNEL);
if (xprt->slot == NULL)
return -ENOMEM;
xprt->prot = IPPROTO_TCP;
xprt->port = xs_get_random_port();
xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0;
xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
INIT_WORK(&xprt->connect_worker, xs_tcp_connect_worker, xprt);
xprt->bind_timeout = XS_BIND_TO;
xprt->connect_timeout = XS_TCP_CONN_TO;
xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
xprt->idle_timeout = XS_IDLE_DISC_TO;
xprt->ops = &xs_tcp_ops;
if (to)
xprt->timeout = *to;
else
xprt_set_timeout(&xprt->timeout, 2, 60 * HZ);
return 0;
}
/*
* Create the NLM RPC client for an NLM peer
*/
struct rpc_clnt *
nlm_bind_host(struct nlm_host *host)
{
struct rpc_clnt *clnt;
struct rpc_xprt *xprt;
dprintk("lockd: nlm_bind_host(%08x)\n",
(unsigned)ntohl(host->h_addr.sin_addr.s_addr));
/* Lock host handle */
down(&host->h_sema);
/* If we've already created an RPC client, check whether
* RPC rebind is required
* Note: why keep rebinding if we're on a tcp connection?
*/
if ((clnt = host->h_rpcclnt) != NULL) {
xprt = clnt->cl_xprt;
if (!xprt->stream && time_after_eq(jiffies, host->h_nextrebind)) {
clnt->cl_port = 0;
host->h_nextrebind = jiffies + NLM_HOST_REBIND;
dprintk("lockd: next rebind in %ld jiffies\n",
host->h_nextrebind - jiffies);
}
} else {
xprt = xprt_create_proto(host->h_proto, &host->h_addr, NULL);
if (IS_ERR(xprt)) {
dprintk("lockd: xprt_create_proto failed: %ld\n", PTR_ERR(xprt));
goto forgetit;
}
xprt_set_timeout(&xprt->timeout, 5, nlmsvc_timeout);
/* Existing NLM servers accept AUTH_UNIX only */
clnt = rpc_create_client(xprt, host->h_name, &nlm_program,
host->h_version, RPC_AUTH_UNIX);
if (IS_ERR(clnt)) {
xprt_destroy(xprt);
dprintk("lockd: rpc_create_client failed: %ld\n", PTR_ERR(clnt));
goto forgetit;
}
clnt->cl_autobind = 1; /* turn on pmap queries */
xprt->nocong = 1; /* No congestion control for NLM */
xprt->resvport = 1; /* NLM requires a reserved port */
host->h_rpcclnt = clnt;
}
up(&host->h_sema);
return clnt;
forgetit:
printk("lockd: couldn't create RPC handle for %s\n", host->h_name);
up(&host->h_sema);
return NULL;
}