gluster: IPv6 single stack support

Summary:
- This diff changes all locations in the code to prefer inet6 family
  instead of inet.  This will allow change GlusterFS to operate
  via IPv6 instead of IPv4 for all internal operations while still
  being able to serve (FUSE or NFS) clients via IPv4.
- The changes apply to NFS as well.
- This diff ports D1892990, D1897341 & D1896522 to the 3.8 branch.

Test Plan: Prove tests!

Reviewers: dph, rwareing

Signed-off-by: Shreyas Siravara <sshreyas@fb.com>

Change-Id: I34fdaaeb33c194782255625e00616faf75d60c33
Reviewed-on: http://review.gluster.org/16059
Reviewed-by: Shreyas Siravara <sshreyas@fb.com>
Tested-by: Shreyas Siravara <sshreyas@fb.com>
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>

4 files changed, 149 insertions, 1 deletions

diff --git a/tests/basic/accept-v6v4.t b/tests/basic/accept-v6v4.t
new file mode 100644
index 00000000000..7128c12c6be
--- /dev/null
+++ b/tests/basic/accept-v6v4.t
@@ -0,0 +1,122 @@
+#!/bin/bash
+
+. $(dirname $0)/../nfs.rc
+
+#
+# This test ensures that GlusterFS provides NFS, Mount and its Management daemon
+# over both IPv4 and IPv6. It uses netcat to check the services running on both
+# IPv4 & IPv6 addresses as well as a mount to test that mount & nfs work.
+#
+
+IPV4_SUPPORT=false
+IPV6_SUPPORT=false
+
+host $HOSTNAME | grep -q "has address" && IPV4_SUPPORT=true
+host $HOSTNAME | grep -q "has IPv6 address" && IPV6_SUPPORT=true
+
+. $(dirname $0)/../include.rc
+
+cleanup;
+
+mkdir -p $B0/b{0,1,2}
+
+# make sure no registered rpcbind services are running
+service rpcbind restart
+
+TEST glusterd
+TEST pidof glusterd
+
+TEST $CLI vol create $V0 replica 3 $H0:$B0/b0 $H0:$B0/b1 $H0:$B0/b2
+
+TEST $CLI vol set $V0 cluster.self-heal-daemon off
+TEST $CLI vol set $V0 nfs.disable off
+TEST $CLI vol set $V0 cluster.choose-local off
+TEST $CLI vol start $V0
+
+MOUNTD_PORT=38465
+MGMTD_PORT=24007
+NFSD_PORT=2049
+
+function check_ip_port {
+        ip=$1
+        port=$2
+        type=$3
+
+        nc_flags=""
+        if [ "$type" == "v6" ] && [ "$ip" == "NONE" ]; then
+          echo "Y"
+          return
+        else
+          nc_flags="-6"
+        fi
+
+        if [ "$type" == "v4" ] && [ "$ip" == "NONE" ]; then
+          echo "Y"
+          return
+        fi
+
+        if exec 3<>/dev/tcp/$ip/$port; then
+          echo "Y"
+        else
+          echo "N"
+        fi
+}
+
+function check_nfs {
+        ip=$1
+        type=$2
+
+        if [ "$ip" == "NONE" ]; then
+          echo "Y"
+          return
+        fi
+
+        if [ "$type" == "v6" ]; then
+          addr="[$ip]"
+        else
+          addr="$ip"
+        fi
+
+        if mount_nfs $addr:/$V0 $N0; then
+          umount_nfs $N0
+          echo "Y"
+        else
+          echo "N"
+        fi
+}
+
+if [ ! $IPV4_SUPPORT ] && [ ! $IPV6_SUPPORT ]; then
+  exit 1
+fi
+
+# Get the V4 & V6 addresses of this host
+if $IPV4_SUPPORT; then
+  V4=$(host $HOSTNAME | head -n1 | awk -F ' ' '{print $4}')
+else
+  V4="NONE"
+fi
+
+if $IPV6_SUPPORT; then
+  V6=$(host $HOSTNAME | tail -n1 | awk -F ' ' '{print $5}')
+else
+  V6="NONE"
+fi
+
+# First check the management daemon
+EXPECT "Y" check_ip_port $V6 $MGMTD_PORT "v6"
+EXPECT "Y" check_ip_port $V4 $MGMTD_PORT "v4"
+
+# Give the MOUNT/NFS Daemon some time to start up
+sleep 4
+
+EXPECT "Y" check_ip_port $V4 $MOUNTD_PORT "v6"
+EXPECT "Y" check_ip_port $V6 $MOUNTD_PORT "v4"
+
+EXPECT "Y" check_ip_port $V4 $NFSD_PORT "v6"
+EXPECT "Y" check_ip_port $V6 $NFSD_PORT "v4"
+
+# Mount the file system
+EXPECT "Y" check_nfs $V6 "v6"
+EXPECT "Y" check_nfs $V4 "v4"
+
+cleanup;
diff --git a/tests/basic/exports_parsing.t b/tests/basic/exports_parsing.t
index fdaf9c2822e..da88bbcb2cc 100644
--- a/tests/basic/exports_parsing.t
+++ b/tests/basic/exports_parsing.t
@@ -32,7 +32,20 @@ function test_bad_opt ()
         glusterfsd --print-exports $1 2>&1 | sed -n 1p
 }
 
-EXPECT_KEYWORD "/test @test(rw,anonuid=0,sec=sys,) 10.35.11.31(rw,anonuid=0,sec=sys,)" test_good_file $EXP_FILES/exports
+function check_export_line() {
+  if [ "$1" == "$2" ]; then
+     echo "Y"
+  else
+    echo "N"
+  fi
+  return
+}
+
+export_result=$(test_good_file $EXP_FILES/exports)
+EXPECT "Y" check_export_line '/test @test(rw,anonuid=0,sec=sys,) 10.35.11.31(rw,anonuid=0,sec=sys,) ' "$export_result"
+
+export_result=$(test_good_file $EXP_FILES/exports-v6)
+EXPECT "Y" check_export_line '/test @test(rw,anonuid=0,sec=sys,) 2401:db00:11:1:face:0:3d:0(rw,anonuid=0,sec=sys,) ' "$export_result"
 
 EXPECT_KEYWORD "Error parsing netgroups for:" test_bad_line $EXP_FILES/bad_exports
 EXPECT_KEYWORD "Error parsing netgroups for:" test_long_netgroup $EXP_FILES/bad_exports
diff --git a/tests/basic/mount-nfs-auth.t b/tests/basic/mount-nfs-auth.t
index 9df5cb45c3b..cd0189788ba 100755
--- a/tests/basic/mount-nfs-auth.t
+++ b/tests/basic/mount-nfs-auth.t
@@ -15,6 +15,9 @@ TEST glusterd
 TEST pidof glusterd
 TEST $CLI volume info
 
+H0IP=$(ip addr show |grep -w inet |grep -v 127.0.0.1|awk '{ print $2 }'| cut -d "/" -f 1)
+H0IP6=$(host $HOSTNAME | grep IPv6 | awk '{print $NF}')
+
 # Export variables for allow & deny
 EXPORT_ALLOW="/$V0 $H0(sec=sys,rw,anonuid=0) @ngtop(sec=sys,rw,anonuid=0)"
 EXPORT_ALLOW_SLASH="/$V0/ $H0(sec=sys,rw,anonuid=0) @ngtop(sec=sys,rw,anonuid=0)"
@@ -37,6 +40,10 @@ function build_dirs () {
         mkdir -p $B0/b{0,1,2}/L1/L2/L3
 }
 
+function export_allow_this_host_ipv6 () {
+        printf "$EXPORT_ALLOW6\n" > /var/lib/glusterd/nfs/exports
+}
+
 function export_allow_this_host () {
         printf "$EXPORT_ALLOW\n" > ${NFSDIR}/exports
 }
@@ -186,6 +193,11 @@ EXPECT_WITHIN $NFS_EXPORT_TIMEOUT "1" is_nfs_export_available
 
 ## Mount NFS
 EXPECT "Y" check_mount_success $V0
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" umount_nfs $N0
+
+## Mount NFS using the IPv6 export
+export_allow_this_host_ipv6
+EXPECT "Y" check_mount_success $V0
 
 ## Disallow host
 TEST export_deny_this_host
diff --git a/tests/configfiles/exports-v6 b/tests/configfiles/exports-v6
new file mode 100644
index 00000000000..426b1ef5705
--- /dev/null
+++ b/tests/configfiles/exports-v6
@@ -0,0 +1 @@
+/test @test(rw,anonuid=0,sec=sys,) 2401:db00:11:1:face:0:3d:0(rw,anonuid=0,sec=sys,)