[LTP] [PATCH 2/2] nfs: Detect disabled UDP

[Petr Vorel]

nfs-utils disabled serving NFS over UDP in version 2.2.1,
which produce TBROK:

nfs01 1 TBROK: 'mount -t nfs -o proto=udp,vers=3
10.0.0.2:/tmp/LTP_nfs01.3pixnljzEv/3/udp /tmp/LTP_nfs01.3pixnljzEv/3/0'
failed on '': 'mount.nfs: requested NFS version or transport protocol is
not supported'

Detect UDP configuration (parsing all configs) and return TCONF when disabled.

NOTE: Debian based distros still use older version, once it upgrades, it
will might keep using current configuration files
(/etc/default/nfs-kernel-server, /etc/default/nfs-common), therefore
code might need to be adjusted.

Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
 testcases/network/nfs/nfs_stress/nfs_lib.sh | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/testcases/network/nfs/nfs_stress/nfs_lib.sh b/testcases/network/nfs/nfs_stress/nfs_lib.sh
index 2d5535dc5..2ba79dfdd 100644
--- a/testcases/network/nfs/nfs_stress/nfs_lib.sh
+++ b/testcases/network/nfs/nfs_stress/nfs_lib.sh
@@ -46,6 +46,15 @@ get_socket_type()
 	done
 }
 
+nfs_server_udp_enabled()
+{
+	local config f
+
+	tst_rhost_run -c "[ -f /etc/nfs.conf ]" || return 0
+	config=$(tst_rhost_run -c 'for f in $(grep ^include.*= '/etc/nfs.conf' | cut -d = -f2); do [ -f $f ] && printf "$f "; done')
+	tst_rhost_run -c "grep -q '^[[:space:]]*udp[[:space:]]*=[[:space:]]*y' /etc/nfs.conf $config"
+}
+
 nfs_setup_server()
 {
 	local export_cmd="exportfs -i -o fsid=$$,no_root_squash,rw *:$remote_dir"
@@ -93,6 +102,10 @@ nfs_setup()
 		type=$(get_socket_type $n)
 		tst_res TINFO "setup NFSv$i, socket type $type"
 
+		if [ "$type" = "udp" ] && ! nfs_server_udp_enabled; then
+			tst_brk TCONF "UDP support disabled on NFS server"
+		fi
+
 		local_dir="$TST_TMPDIR/$i/$n"
 		remote_dir="$TST_TMPDIR/$i/$type"
 		mkdir -p $local_dir
-- 
2.25.1