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nfs-utils: fix protocol minor version fall-back 

Mount nfs directory would fail if no specific nfsvers:
mount -t nfs IP:/foo/bar/ /mnt/
mount.nfs: an incorrect mount option was specified

mount.nfs currently expects mount(2) to fail with EPROTONOSUPPORT if
the kernel doesn't understand the requested NFS version.
Unfortunately if the requested minor is not known to the kernel
it returns -EINVAL.

Backport patch from nfs-utils-1.3.4 to fix this issue.

(From OE-Core rev: 332596628697d28ae6e8c2271c9658aaf5e54796)

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Yi Zhao 2016-11-16 18:07:43 +08:00 committed by Richard Purdie
parent 25078834f7
commit 19b5218696
2 changed files with 56 additions and 0 deletions
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55
meta/recipes-connectivity/nfs-utils/nfs-utils/fix-protocol-minor-version-fall-back.patch Normal file
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@ -0,0 +1,55 @@
From 78bb645a42c216b37b8d930c7c849a3fa89babf8 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.com>
Date: Sat, 16 Jan 2016 12:02:30 -0500
Subject: [PATCH] Fix protocol minor version fall-back
mount.nfs currently expects mount(2) to fail with EPROTONOSUPPORT if
the kernel doesn't understand the requested NFS version.
Unfortunately if the requested minor is not known to the kernel
it returns -EINVAL.
In kernels since 3.11 this can happen in nfs4_alloc_client(), if
compiled without NFS_V4_2.
More generally it can happen in in nfs_validate_text_mount_data()
when nfs_parse_mount_options() returns 0 because
nfs_parse_version_string()
didn't recognise the version.
EPROTONOSUPPORT is only returned if NFSv4 support is completely compiled
out.
So nfs_autonegotiate needs to check for EINVAL as well as
EPROTONOSUPPORT.
URL: https://bugzilla.opensuse.org/show_bug.cgi?id=959211
Reported-by: Takashi Iwai <tiwai@suse.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
Upstream-Status: Backport
http://git.linux-nfs.org/?p=steved/nfs-utils.git;a=patch;h=78bb645a42c216b37b8d930c7c849a3fa89babf8
Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
---
utils/mount/stropts.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/utils/mount/stropts.c b/utils/mount/stropts.c
index c8f5a6d..86829a9 100644
--- a/utils/mount/stropts.c
+++ b/utils/mount/stropts.c
@@ -841,6 +841,9 @@ check_result:
case EPROTONOSUPPORT:
/* A clear indication that the server or our
* client does not support NFS version 4 and minor */
+ case EINVAL:
+ /* A less clear indication that our client
+ * does not support NFSv4 minor version. */
if (mi->version.v_mode == V_GENERAL &&
mi->version.minor == 0)
return result;
--
2.7.4

1
meta/recipes-connectivity/nfs-utils/nfs-utils_1.3.3.bb
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@ -33,6 +33,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/utils/nfs-utils/${PV}/nfs-utils-${PV}.tar.x
file://nfs-utils-debianize-start-statd.patch \
file://0001-nfs-utils-statd-fix-a-segfault-caused-by-improper-us.patch \
file://bugfix-adjust-statd-service-name.patch \
file://fix-protocol-minor-version-fall-back.patch \
"
SRC_URI[md5sum] = "cd6b568c2e9301cc3bfac09d87fbbc0b"