Merge branch 'nfs-for-next' of git://linux-nfs.org/~trondmy/nfs-2.6 into for-3.10

[~andy/linux] / net / sunrpc / clnt.c

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index a9f7906c1a6ad251d4881bb731632d695449a720..3f7930f938cc295c79cdec097c1db4a9109a6086 100644 (file)
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -33,6 +33,7 @@
 #include <linux/rcupdate.h>
 
 #include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/addr.h>
 #include <linux/sunrpc/rpc_pipe_fs.h>
 #include <linux/sunrpc/metrics.h>
 #include <linux/sunrpc/bc_xprt.h>
@@ -303,10 +304,8 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, stru
        err = rpciod_up();
        if (err)
                goto out_no_rpciod;
-       err = -EINVAL;
-       if (!xprt)
-               goto out_no_xprt;
 
+       err = -EINVAL;
        if (args->version >= program->nrvers)
                goto out_err;
        version = program->version[args->version];
@@ -381,10 +380,9 @@ out_no_principal:
 out_no_stats:
        kfree(clnt);
 out_err:
-       xprt_put(xprt);
-out_no_xprt:
        rpciod_down();
 out_no_rpciod:
+       xprt_put(xprt);
        return ERR_PTR(err);
 }
 
@@ -413,6 +411,10 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
        };
        char servername[48];
 
+       if (args->flags & RPC_CLNT_CREATE_INFINITE_SLOTS)
+               xprtargs.flags |= XPRT_CREATE_INFINITE_SLOTS;
+       if (args->flags & RPC_CLNT_CREATE_NO_IDLE_TIMEOUT)
+               xprtargs.flags |= XPRT_CREATE_NO_IDLE_TIMEOUT;
        /*
         * If the caller chooses not to specify a hostname, whip
         * up a string representation of the passed-in address.
@@ -511,7 +513,7 @@ static struct rpc_clnt *__rpc_clone_client(struct rpc_create_args *args,
        new = rpc_new_client(args, xprt);
        if (IS_ERR(new)) {
                err = PTR_ERR(new);
-               goto out_put;
+               goto out_err;
        }
 
        atomic_inc(&clnt->cl_count);
@@ -524,8 +526,6 @@ static struct rpc_clnt *__rpc_clone_client(struct rpc_create_args *args,
        new->cl_chatty = clnt->cl_chatty;
        return new;
 
-out_put:
-       xprt_put(xprt);
 out_err:
        dprintk("RPC:       %s: returned error %d\n", __func__, err);
        return ERR_PTR(err);
@@ -683,6 +683,7 @@ rpc_release_client(struct rpc_clnt *clnt)
        if (atomic_dec_and_test(&clnt->cl_count))
                rpc_free_auth(clnt);
 }
+EXPORT_SYMBOL_GPL(rpc_release_client);
 
 /**
  * rpc_bind_new_program - bind a new RPC program to an existing client
@@ -1195,6 +1196,21 @@ size_t rpc_max_payload(struct rpc_clnt *clnt)
 }
 EXPORT_SYMBOL_GPL(rpc_max_payload);
 
+/**
+ * rpc_get_timeout - Get timeout for transport in units of HZ
+ * @clnt: RPC client to query
+ */
+unsigned long rpc_get_timeout(struct rpc_clnt *clnt)
+{
+       unsigned long ret;
+
+       rcu_read_lock();
+       ret = rcu_dereference(clnt->cl_xprt)->timeout->to_initval;
+       rcu_read_unlock();
+       return ret;
+}
+EXPORT_SYMBOL_GPL(rpc_get_timeout);
+
 /**
  * rpc_force_rebind - force transport to check that remote port is unchanged
  * @clnt: client to rebind
@@ -1290,6 +1306,8 @@ call_reserve(struct rpc_task *task)
        xprt_reserve(task);
 }
 
+static void call_retry_reserve(struct rpc_task *task);
+
 /*
  * 1b. Grok the result of xprt_reserve()
  */
@@ -1331,7 +1349,7 @@ call_reserveresult(struct rpc_task *task)
        case -ENOMEM:
                rpc_delay(task, HZ >> 2);
        case -EAGAIN:   /* woken up; retry */
-               task->tk_action = call_reserve;
+               task->tk_action = call_retry_reserve;
                return;
        case -EIO:      /* probably a shutdown */
                break;
@@ -1343,6 +1361,19 @@ call_reserveresult(struct rpc_task *task)
        rpc_exit(task, status);
 }
 
+/*
+ * 1c. Retry reserving an RPC call slot
+ */
+static void
+call_retry_reserve(struct rpc_task *task)
+{
+       dprint_status(task);
+
+       task->tk_status  = 0;
+       task->tk_action  = call_reserveresult;
+       xprt_retry_reserve(task);
+}
+
 /*
  * 2.  Bind and/or refresh the credentials
  */
@@ -1628,22 +1659,26 @@ call_connect_status(struct rpc_task *task)
 
        dprint_status(task);
 
-       task->tk_status = 0;
-       if (status >= 0 || status == -EAGAIN) {
-               clnt->cl_stats->netreconn++;
-               task->tk_action = call_transmit;
-               return;
-       }
-
        trace_rpc_connect_status(task, status);
        switch (status) {
                /* if soft mounted, test if we've timed out */
        case -ETIMEDOUT:
                task->tk_action = call_timeout;
-               break;
-       default:
-               rpc_exit(task, -EIO);
+               return;
+       case -ECONNREFUSED:
+       case -ECONNRESET:
+       case -ENETUNREACH:
+               if (RPC_IS_SOFTCONN(task))
+                       break;
+               /* retry with existing socket, after a delay */
+       case 0:
+       case -EAGAIN:
+               task->tk_status = 0;
+               clnt->cl_stats->netreconn++;
+               task->tk_action = call_transmit;
+               return;
        }
+       rpc_exit(task, status);
 }
 
 /*