rquota: add xdrs for rquota protocol

Motivation:
Despite the fact that the NFS v4 protocol specifies attributes to query the quota
(https://tools.ietf.org/html/rfc5661#section-5.8.2.28), the Linux client does not
implement it, as the quota is not associated with a user or a group.

To support classic user and group quotas, the rquota protocol can be implemented.

Modification:
Add required xdr and server sub.

Result:
required building block to implement quota protocol.

Issue: #133
Acked-by:  Lea Morschel
Target: master

pom.xml

@@ -42,6 +42,7 @@
       <module>dlm</module>
       <module>benchmarks</module>
       <module>basic-server</module>
+      <module>rquota</module>
   </modules>
 
   <properties>

rquota/pom.xml

@@ -0,0 +1,50 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+      <groupId>org.dcache</groupId>
+      <artifactId>nfs4j</artifactId>
+      <version>0.26.0-SNAPSHOT</version>
+    </parent>
+
+    <groupId>org.dcache</groupId>
+    <artifactId>rquota</artifactId>
+    <packaging>jar</packaging>
+    <description>Remote quota protocol implementation</description>
+
+    <!--
+        EXTERNAL DEPENDENCIES
+    -->
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <!-- to get console logging during development/debug -->
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.dcache</groupId>
+            <artifactId>oncrpc4j-core</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

rquota/src/main/java/org/dcache/rquota/xdr/ext_getquota_args.java

@@ -0,0 +1,43 @@
+/*
+ * Automatically generated by jrpcgen 1.0.7+ on 6/19/24, 7:09 PM
+ * jrpcgen is part of the "Remote Tea" ONC/RPC package for Java
+ * See http://remotetea.sourceforge.net for details
+ *
+ * This version of jrpcgen adopted by dCache project
+ * See http://www.dCache.ORG for details
+ */
+package org.dcache.rquota.xdr;
+import org.dcache.oncrpc4j.rpc.*;
+import org.dcache.oncrpc4j.rpc.net.*;
+import org.dcache.oncrpc4j.xdr.*;
+import java.io.IOException;
+
+public class ext_getquota_args implements XdrAble {
+    public String gqa_pathp;
+    public int gqa_type;
+    public int gqa_id;
+
+    public ext_getquota_args() {
+    }
+
+    public ext_getquota_args(XdrDecodingStream xdr)
+           throws OncRpcException, IOException {
+        xdrDecode(xdr);
+    }
+
+    public void xdrEncode(XdrEncodingStream xdr)
+           throws OncRpcException, IOException {
+        xdr.xdrEncodeString(gqa_pathp);
+        xdr.xdrEncodeInt(gqa_type);
+        xdr.xdrEncodeInt(gqa_id);
+    }
+
+    public void xdrDecode(XdrDecodingStream xdr)
+           throws OncRpcException, IOException {
+        gqa_pathp = xdr.xdrDecodeString();
+        gqa_type = xdr.xdrDecodeInt();
+        gqa_id = xdr.xdrDecodeInt();
+    }
+
+}
+// End of ext_getquota_args.java

rquota/src/main/java/org/dcache/rquota/xdr/ext_setquota_args.java

@@ -0,0 +1,49 @@
+/*
+ * Automatically generated by jrpcgen 1.0.7+ on 6/19/24, 7:09 PM
+ * jrpcgen is part of the "Remote Tea" ONC/RPC package for Java
+ * See http://remotetea.sourceforge.net for details
+ *
+ * This version of jrpcgen adopted by dCache project
+ * See http://www.dCache.ORG for details
+ */
+package org.dcache.rquota.xdr;
+import org.dcache.oncrpc4j.rpc.*;
+import org.dcache.oncrpc4j.rpc.net.*;
+import org.dcache.oncrpc4j.xdr.*;
+import java.io.IOException;
+
+public class ext_setquota_args implements XdrAble {
+    public int sqa_qcmd;
+    public String sqa_pathp;
+    public int sqa_id;
+    public int sqa_type;
+    public sq_dqblk sqa_dqblk;
+
+    public ext_setquota_args() {
+    }
+
+    public ext_setquota_args(XdrDecodingStream xdr)
+           throws OncRpcException, IOException {
+        xdrDecode(xdr);
+    }
+
+    public void xdrEncode(XdrEncodingStream xdr)
+           throws OncRpcException, IOException {
+        xdr.xdrEncodeInt(sqa_qcmd);
+        xdr.xdrEncodeString(sqa_pathp);
+        xdr.xdrEncodeInt(sqa_id);
+        xdr.xdrEncodeInt(sqa_type);
+        sqa_dqblk.xdrEncode(xdr);
+    }
+
+    public void xdrDecode(XdrDecodingStream xdr)
+           throws OncRpcException, IOException {
+        sqa_qcmd = xdr.xdrDecodeInt();
+        sqa_pathp = xdr.xdrDecodeString();
+        sqa_id = xdr.xdrDecodeInt();
+        sqa_type = xdr.xdrDecodeInt();
+        sqa_dqblk = new sq_dqblk(xdr);
+    }
+
+}
+// End of ext_setquota_args.java

rquota/src/main/java/org/dcache/rquota/xdr/getquota_args.java

@@ -0,0 +1,40 @@
+/*
+ * Automatically generated by jrpcgen 1.0.7+ on 6/19/24, 7:09 PM
+ * jrpcgen is part of the "Remote Tea" ONC/RPC package for Java
+ * See http://remotetea.sourceforge.net for details
+ *
+ * This version of jrpcgen adopted by dCache project
+ * See http://www.dCache.ORG for details
+ */
+package org.dcache.rquota.xdr;
+import org.dcache.oncrpc4j.rpc.*;
+import org.dcache.oncrpc4j.rpc.net.*;
+import org.dcache.oncrpc4j.xdr.*;
+import java.io.IOException;
+
+public class getquota_args implements XdrAble {
+    public String gqa_pathp;
+    public int gqa_uid;
+
+    public getquota_args() {
+    }
+
+    public getquota_args(XdrDecodingStream xdr)
+           throws OncRpcException, IOException {
+        xdrDecode(xdr);
+    }
+
+    public void xdrEncode(XdrEncodingStream xdr)
+           throws OncRpcException, IOException {
+        xdr.xdrEncodeString(gqa_pathp);
+        xdr.xdrEncodeInt(gqa_uid);
+    }
+
+    public void xdrDecode(XdrDecodingStream xdr)
+           throws OncRpcException, IOException {
+        gqa_pathp = xdr.xdrDecodeString();
+        gqa_uid = xdr.xdrDecodeInt();
+    }
+
+}
+// End of getquota_args.java

rquota/src/main/java/org/dcache/rquota/xdr/getquota_rslt.java

@@ -0,0 +1,56 @@
+/*
+ * Automatically generated by jrpcgen 1.0.7+ on 6/19/24, 7:09 PM
+ * jrpcgen is part of the "Remote Tea" ONC/RPC package for Java
+ * See http://remotetea.sourceforge.net for details
+ *
+ * This version of jrpcgen adopted by dCache project
+ * See http://www.dCache.ORG for details
+ */
+package org.dcache.rquota.xdr;
+import org.dcache.oncrpc4j.rpc.*;
+import org.dcache.oncrpc4j.rpc.net.*;
+import org.dcache.oncrpc4j.xdr.*;
+import java.io.IOException;
+
+public class getquota_rslt implements XdrAble {
+    public int status;
+    public rquota gqr_rquota;
+
+    public getquota_rslt() {
+    }
+
+    public getquota_rslt(XdrDecodingStream xdr)
+           throws OncRpcException, IOException {
+        xdrDecode(xdr);
+    }
+
+    public void xdrEncode(XdrEncodingStream xdr)
+           throws OncRpcException, IOException {
+        xdr.xdrEncodeInt(status);
+        switch ( status ) {
+        case qr_status.Q_OK:
+            gqr_rquota.xdrEncode(xdr);
+            break;
+        case qr_status.Q_NOQUOTA:
+            break;
+        case qr_status.Q_EPERM:
+            break;
+        }
+    }
+
+    public void xdrDecode(XdrDecodingStream xdr)
+           throws OncRpcException, IOException {
+        status = xdr.xdrDecodeInt();
+        switch ( status ) {
+        case qr_status.Q_OK:
+            gqr_rquota = new rquota(xdr);
+            break;
+        case qr_status.Q_NOQUOTA:
+            break;
+        case qr_status.Q_EPERM:
+            break;
+        }
+    }
+
+}
+// End of getquota_rslt.java

rquota/src/main/java/org/dcache/rquota/xdr/qr_status.java

@@ -0,0 +1,20 @@
+/*
+ * Automatically generated by jrpcgen 1.0.7+ on 6/19/24, 7:09 PM
+ * jrpcgen is part of the "Remote Tea" ONC/RPC package for Java
+ * See http://remotetea.sourceforge.net for details
+ *
+ * This version of jrpcgen adopted by dCache project
+ * See http://www.dCache.ORG for details
+ */
+package org.dcache.rquota.xdr;
+/**
+ * Enumeration (collection of constants).
+ */
+public interface qr_status {
+
+    public static final int Q_OK = 1;
+    public static final int Q_NOQUOTA = 2;
+    public static final int Q_EPERM = 3;
+
+}
+// End of qr_status.java

rquota/src/main/java/org/dcache/rquota/xdr/rquota.java

@@ -0,0 +1,64 @@
+/*
+ * Automatically generated by jrpcgen 1.0.7+ on 6/19/24, 7:09 PM
+ * jrpcgen is part of the "Remote Tea" ONC/RPC package for Java
+ * See http://remotetea.sourceforge.net for details
+ *
+ * This version of jrpcgen adopted by dCache project
+ * See http://www.dCache.ORG for details
+ */
+package org.dcache.rquota.xdr;
+import org.dcache.oncrpc4j.rpc.*;
+import org.dcache.oncrpc4j.rpc.net.*;
+import org.dcache.oncrpc4j.xdr.*;
+import java.io.IOException;
+
+public class rquota implements XdrAble {
+    public int rq_bsize;
+    public boolean rq_active;
+    public int rq_bhardlimit;
+    public int rq_bsoftlimit;
+    public int rq_curblocks;
+    public int rq_fhardlimit;
+    public int rq_fsoftlimit;
+    public int rq_curfiles;
+    public int rq_btimeleft;
+    public int rq_ftimeleft;
+
+    public rquota() {
+    }
+
+    public rquota(XdrDecodingStream xdr)
+           throws OncRpcException, IOException {
+        xdrDecode(xdr);
+    }
+
+    public void xdrEncode(XdrEncodingStream xdr)
+           throws OncRpcException, IOException {
+        xdr.xdrEncodeInt(rq_bsize);
+        xdr.xdrEncodeBoolean(rq_active);
+        xdr.xdrEncodeInt(rq_bhardlimit);
+        xdr.xdrEncodeInt(rq_bsoftlimit);
+        xdr.xdrEncodeInt(rq_curblocks);
+        xdr.xdrEncodeInt(rq_fhardlimit);
+        xdr.xdrEncodeInt(rq_fsoftlimit);
+        xdr.xdrEncodeInt(rq_curfiles);
+        xdr.xdrEncodeInt(rq_btimeleft);
+        xdr.xdrEncodeInt(rq_ftimeleft);
+    }
+
+    public void xdrDecode(XdrDecodingStream xdr)
+           throws OncRpcException, IOException {
+        rq_bsize = xdr.xdrDecodeInt();
+        rq_active = xdr.xdrDecodeBoolean();
+        rq_bhardlimit = xdr.xdrDecodeInt();
+        rq_bsoftlimit = xdr.xdrDecodeInt();
+        rq_curblocks = xdr.xdrDecodeInt();
+        rq_fhardlimit = xdr.xdrDecodeInt();
+        rq_fsoftlimit = xdr.xdrDecodeInt();
+        rq_curfiles = xdr.xdrDecodeInt();
+        rq_btimeleft = xdr.xdrDecodeInt();
+        rq_ftimeleft = xdr.xdrDecodeInt();
+    }
+
+}
+// End of rquota.java

rquota/src/main/java/org/dcache/rquota/xdr/rquota.java~

@@ -0,0 +1,27 @@
+/*
+ * Automatically generated by jrpcgen 1.0.7+ on 6/19/24, 7:09 PM
+ * jrpcgen is part of the "Remote Tea" ONC/RPC package for Java
+ * See http://remotetea.sourceforge.net for details
+ *
+ * This version of jrpcgen adopted by dCache project
+ * See http://www.dCache.ORG for details
+ */
+package org.dcache.rquota.xdr;
+/**
+ * A collection of constants used by the "rquota" ONC/RPC program.
+ */
+public interface rquota {
+    public static final int RQUOTAPROC_GETQUOTA_1 = 1;
+    public static final int RQUOTAPROC_GETACTIVEQUOTA_1 = 2;
+    public static final int RQUOTAPROC_GETQUOTA_2 = 1;
+    public static final int RQUOTAPROC_SETQUOTA_1 = 3;
+    public static final int RQUOTAPROC_GETACTIVEQUOTA_2 = 2;
+    public static final int RQUOTAPROC_SETQUOTA_2 = 3;
+    public static final int RQUOTAVERS = 1;
+    public static final int RQ_PATHLEN = 1024;
+    public static final int RQUOTAPROG = 100011;
+    public static final int RQUOTAPROC_SETACTIVEQUOTA_1 = 4;
+    public static final int RQUOTAPROC_SETACTIVEQUOTA_2 = 4;
+    public static final int EXT_RQUOTAVERS = 2;
+}
+// End of rquota.java