[zeus][PATCH] nfs-utils: Disable statx if using glibc emulation

[zeus][PATCH] nfs-utils: Disable statx if using glibc emulation

[Julius Hemanth Pitti]

nfs-utils 2.4.1, moves from "stat" to "statx
with AT_STATX_DONT_SYNC" in parts of the code.

statx is supported in Linux kernel v4.11 and above.
For all older kernels glibc emulates statx, and it
doesn't support AT_STATX_DONT_SYNC and will return
EINVAL.

When server uses nfs-utils 2.4.1 on kernel v4.10
and older, mount.nfs4 would fail with error
"reason given by server: No such file or directory".

Since Linux v4.4 and v4.9 are LTS, its more likely
that people would use above combination.

This issue has been fixed in nfs-utils 2.4.3 and
above. Backporting fix to 2.4.1.

Signed-off-by: Julius Hemanth Pitti <jpitti@cisco.com>
---
 ...sable-statx-if-using-glibc-emulation.patch | 34 +++++++++++++++++++
 .../nfs-utils/nfs-utils_2.4.1.bb              |  1 +
 2 files changed, 35 insertions(+)
 create mode 100644 meta/recipes-connectivity/nfs-utils/nfs-utils/0001-Disable-statx-if-using-glibc-emulation.patch

diff --git a/meta/recipes-connectivity/nfs-utils/nfs-utils/0001-Disable-statx-if-using-glibc-emulation.patch b/meta/recipes-connectivity/nfs-utils/nfs-utils/0001-Disable-statx-if-using-glibc-emulation.patch
new file mode 100644
index 0000000000..b8f96f3fba
--- /dev/null
+++ b/meta/recipes-connectivity/nfs-utils/nfs-utils/0001-Disable-statx-if-using-glibc-emulation.patch
@@ -0,0 +1,34 @@
+From ff3ad88c233ecd87f7983ad13836323f944540ec Mon Sep 17 00:00:00 2001
+From: Doug Nazar <nazard@nazar.ca>
+Date: Mon, 9 Dec 2019 10:53:37 -0500
+Subject: [PATCH] Disable statx if using glibc emulation
+
+On older kernels without statx, glibc with statx support will attempt
+to emulate the call. However it doesn't support AT_STATX_DONT_SYNC and
+will return EINVAL. This causes all xstat/xlstat calls to fail.
+
+Upstream Status: Backport
+
+Signed-off-by: Doug Nazar <nazard@nazar.ca>
+Signed-off-by: Steve Dickson <steved@redhat.com>
+---
+ support/misc/xstat.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/support/misc/xstat.c b/support/misc/xstat.c
+index 661e29e4..a438fbcc 100644
+--- a/support/misc/xstat.c
++++ b/support/misc/xstat.c
+@@ -51,6 +51,9 @@ statx_do_stat(int fd, const char *pathname, struct stat *statbuf, int flags)
+ 			statx_copy(statbuf, &stxbuf);
+ 			return 0;
+ 		}
++		/* glibc emulation doesn't support AT_STATX_DONT_SYNC */
++		if (errno == EINVAL)
++			errno = ENOSYS;
+ 		if (errno == ENOSYS)
+ 			statx_supported = 0;
+ 	} else
+-- 
+2.19.1
+
diff --git a/meta/recipes-connectivity/nfs-utils/nfs-utils_2.4.1.bb b/meta/recipes-connectivity/nfs-utils/nfs-utils_2.4.1.bb
index 7e80354e4e..3ae8f965c8 100644
--- a/meta/recipes-connectivity/nfs-utils/nfs-utils_2.4.1.bb
+++ b/meta/recipes-connectivity/nfs-utils/nfs-utils_2.4.1.bb
@@ -33,6 +33,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/utils/nfs-utils/${PV}/nfs-utils-${PV}.tar.x
            file://0001-Makefile.am-fix-undefined-function-for-libnsm.a.patch \
            file://0001-Don-t-build-tools-with-CC_FOR_BUILD.patch \
            file://0001-Fix-include-order-between-config.h-and-stat.h.patch \
+           file://0001-Disable-statx-if-using-glibc-emulation.patch \
 "
 SRC_URI_append_libc-glibc = " file://0001-configure.ac-Do-not-fatalize-Wmissing-prototypes.patch"
 SRC_URI_append_libc-musl = " file://nfs-utils-musl-res_querydomain.patch"
-- 
2.18.1

✗ patchtest: failure for nfs-utils: Disable statx if using glibc emulation

[Patchwork]

== Series Details ==

Series: nfs-utils: Disable statx if using glibc emulation
Revision: 1
URL   : https://patchwork.openembedded.org/series/23317/
State : failure

== Summary ==


Thank you for submitting this patch series to OpenEmbedded Core. This is
an automated response. Several tests have been executed on the proposed
series by patchtest resulting in the following failures:



* Issue             Upstream-Status is in incorrect format [test_upstream_status_presence_format] 
  Suggested fix    Fix Upstream-Status format in 0001-Disable-statx-if-using-glibc-emulation.patch
  Current          Upstream Status: Backport
  Standard format  Upstream-Status: <Valid status>
  Valid status     Pending, Accepted, Backport, Denied, Inappropriate [reason], Submitted [where]



If you believe any of these test results are incorrect, please reply to the
mailing list (openembedded-core@lists.openembedded.org) raising your concerns.
Otherwise we would appreciate you correcting the issues and submitting a new
version of the patchset if applicable. Please ensure you add/increment the
version number when sending the new version (i.e. [PATCH] -> [PATCH v2] ->
[PATCH v3] -> ...).

---
Guidelines:     https://www.openembedded.org/wiki/Commit_Patch_Message_Guidelines
Test framework: http://git.yoctoproject.org/cgit/cgit.cgi/patchtest
Test suite:     http://git.yoctoproject.org/cgit/cgit.cgi/patchtest-oe