Fix the krpc so that it can handle NFSv3,UDP mounts with a read/write

data size greater than 8192. Since soreserve(so, 256*1024, 256*1024)
would always fail for the default value of sb_max, modify clnt_dg.c
so that it uses the calculated values and checks for an error return
from soreserve(). Also, add a check for error return from soreserve()
to clnt_vc.c and change __rpc_get_t_size() to use sb_max_adj instead of
the bogus maxsize == 256*1024.

PR:		kern/150910
Reviewed by:	jhb
MFC after:	2 weeks

1 files changed, 7 insertions, 1 deletions

diff --git a/sys/rpc/clnt_dg.c b/sys/rpc/clnt_dg.c
index e3fa02c..a01f598 100644
--- a/sys/rpc/clnt_dg.c
+++ b/sys/rpc/clnt_dg.c
@@ -193,6 +193,7 @@ clnt_dg_create(
 	struct rpc_msg call_msg;
 	struct __rpc_sockinfo si;
 	XDR xdrs;
+	int error;
 
 	if (svcaddr == NULL) {
 		rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
@@ -267,7 +268,12 @@ clnt_dg_create(
 	 */
 	cu->cu_closeit = FALSE;
 	cu->cu_socket = so;
-	soreserve(so, 256*1024, 256*1024);
+	error = soreserve(so, (u_long)sendsz, (u_long)recvsz);
+	if (error != 0) {
+		rpc_createerr.cf_stat = RPC_FAILED;
+		rpc_createerr.cf_error.re_errno = error;
+		goto err2;
+	}
 
 	sb = &so->so_rcv;
 	SOCKBUF_LOCK(&so->so_rcv);