From 1da720aa3aef1931d631487a4e53295de2cd08e0 Mon Sep 17 00:00:00 2001
From: "Kaleb S. KEITHLEY" <kkeithle@redhat.com>
Date: Thu, 19 Oct 2017 13:20:21 -0400
Subject: [PATCH] libntirpc 1.5.3 PR
 https://github.com/nfs-ganesha/ntirpc/pull/85

---
 ...his-writing-glibc-2.26-has-a-bug-whe.patch | 47 +++++++++++++++++++
 libntirpc.spec                                |  7 ++-
 2 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 0001-At-the-time-of-this-writing-glibc-2.26-has-a-bug-whe.patch

diff --git a/0001-At-the-time-of-this-writing-glibc-2.26-has-a-bug-whe.patch b/0001-At-the-time-of-this-writing-glibc-2.26-has-a-bug-whe.patch
new file mode 100644
index 0000000..4b2d527
--- /dev/null
+++ b/0001-At-the-time-of-this-writing-glibc-2.26-has-a-bug-whe.patch
@@ -0,0 +1,47 @@
+From 21ff8f02500477bda460cb5a5b363dacd97ef360 Mon Sep 17 00:00:00 2001
+From: "Kaleb S. KEITHLEY" <kkeithle@redhat.com>
+Date: Thu, 19 Oct 2017 12:01:14 -0400
+Subject: [PATCH] At the time of this writing, glibc-2.26 has a bug where  
+ sysconf(_SC_IOV_MAX); always returns -1.
+
+Versions known to have this bug are glibc-2.26-8 in Fedora 27 beta
+and glibc-2.26.90-16 in Fedora 28 rawhide.
+
+Upstream glibc BZ at
+  https://sourceware.org/bugzilla/show_bug.cgi?id=22321
+
+Linux does have a limit on the size of the iovec that is passed in
+readv/writev syscalls; defined as UIO_MAXIOV (i.e. 1024) in
+.../include/uapi/linux/uio.h. See kernel source readv/writev syscalls.
+
+It's also possible to get _XOPEN_IOV_MAX (i.e. 16) and IOV_MAX (1024)
+by wrapping <limits.h> with #define __USE_XOPEN ... #undef but that's
+XOpen and theoretically Linux could change.
+---
+ src/svc.c | 10 +++++++++-
+ 1 file changed, 9 insertions(+), 1 deletion(-)
+
+diff --git a/src/svc.c b/src/svc.c
+index 9ca5b791..eec79604 100644
+--- a/src/svc.c
++++ b/src/svc.c
+@@ -227,7 +227,15 @@ svc_init(svc_init_params *params)
+ 	mutex_unlock(&__svc_params->mtx);
+ 
+ #if defined(_SC_IOV_MAX) /* IRIX, MacOS X, FreeBSD, Solaris, ... */
+-	__svc_maxiov = sysconf(_SC_IOV_MAX);
++	{
++		/*
++		 * some glibc (e.g. 2.26 in Fedora 27 beta) always
++		 * return -1
++		 */
++		int i = sysconf(_SC_IOV_MAX);
++		if (i != -1 && i > __svc_maxiov)
++			__svc_maxiov = i;
++	}
+ #endif
+ 	return true;
+ }
+-- 
+2.13.5
+
diff --git a/libntirpc.spec b/libntirpc.spec
index 59de335..9ffac24 100644
--- a/libntirpc.spec
+++ b/libntirpc.spec
@@ -3,13 +3,14 @@
 
 Name:		libntirpc
 Version:	1.5.3
-Release:	3%{?dev:%{dev}}%{?dist}
+Release:	4%{?dev:%{dev}}%{?dist}
 Summary:	New Transport Independent RPC Library
 Group:		System Environment/Libraries
 License:	BSD
 Url:		https://github.com/nfs-ganesha/ntirpc
 
 Source0:	https://github.com/nfs-ganesha/ntirpc/archive/v%{version}/ntirpc-%{version}.tar.gz
+Patch0:		0001-At-the-time-of-this-writing-glibc-2.26-has-a-bug-whe.patch
 
 BuildRequires:	cmake
 BuildRequires:	krb5-devel
@@ -39,6 +40,7 @@ Development headers and auxiliary files for developing with %{name}.
 
 %prep
 %setup -q -n ntirpc-%{version}
+%patch0 -p1
 
 %build
 %cmake . -DOVERRIDE_INSTALL_PREFIX=/usr -DTIRPC_EPOLL=1 -DUSE_GSS=ON "-GUnix Makefiles"
@@ -72,6 +74,9 @@ install -p -m 644 libntirpc.pc %{buildroot}%{_libdir}/pkgconfig/
 %{_libdir}/pkgconfig/libntirpc.pc
 
 %changelog
+* Thu Oct 19 2017 Kaleb S. KEITHLEY <kkeithle at redhat.com> 1.5.3-4
+- libntirpc 1.5.3 PR https://github.com/nfs-ganesha/ntirpc/pull/85
+
 * Thu Aug 03 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.5.3-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild