Expose case sensitivity settings

Signed-off-by: David Kocher <dkocher@iterate.ch>

core/src/main/java/org/dcache/nfs/v4/OperationGETATTR.java

@@ -250,9 +250,9 @@ public class OperationGETATTR extends AbstractNFSv4Operation {
             case nfs4_prot.FATTR4_CANSETTIME:
                 return Optional.of(new fattr4_cansettime(true));
             case nfs4_prot.FATTR4_CASE_INSENSITIVE:
-                return Optional.of(new fattr4_case_insensitive(true));
+                return Optional.of(new fattr4_case_insensitive(fs.getCaseInsensitive()));
             case nfs4_prot.FATTR4_CASE_PRESERVING:
-                return Optional.of(new fattr4_case_preserving(true));
+                return Optional.of(new fattr4_case_preserving(fs.getCasePreserving()));
             case nfs4_prot.FATTR4_CHOWN_RESTRICTED:
                 return Optional.empty();
             case nfs4_prot.FATTR4_FILEID:

core/src/main/java/org/dcache/nfs/vfs/ForwardingFileSystem.java

@@ -140,6 +140,16 @@ public abstract class ForwardingFileSystem implements VirtualFileSystem {
         delegate().setAcl(inode, acl);
     }
 
+    @Override
+    public boolean getCaseInsensitive() {
+        return delegate().getCaseInsensitive();
+    }
+
+    @Override
+    public boolean getCasePreserving() {
+        return delegate().getCasePreserving();
+    }
+
     @Override
     public boolean hasIOLayout(Inode inode) throws IOException {
         return delegate().hasIOLayout(inode);

core/src/main/java/org/dcache/nfs/vfs/VfsCache.java

@@ -183,6 +183,16 @@ public class VfsCache extends ForwardingFileSystem {
 	invalidateStatCache(inode);
     }
 
+    @Override
+    public boolean getCaseInsensitive() {
+        return _inner.getCaseInsensitive();
+    }
+
+    @Override
+    public boolean getCasePreserving() {
+        return _inner.getCasePreserving();
+    }
+
     /*
        Utility methods for cache manipulation.
      */

core/src/main/java/org/dcache/nfs/vfs/VirtualFileSystem.java

@@ -297,6 +297,18 @@ public interface VirtualFileSystem {
      */
     NfsIdMapping getIdMapper();
 
+    /**
+     * Determins if this file system is case insensitive.
+     * @return
+     */
+    boolean getCaseInsensitive();
+
+    /**
+     * Determines if this case insensitive file system is case preserving.
+     * @return
+     */
+    boolean getCasePreserving();
+
     /**
      * Object which represents write operation result.
      */

core/src/test/java/org/dcache/nfs/vfs/DummyVFS.java

@@ -583,6 +583,16 @@ public class DummyVFS implements VirtualFileSystem {
         return _idMapper;
     }
 
+    @Override
+    public boolean getCaseInsensitive() {
+        return true;
+    }
+
+    @Override
+    public boolean getCasePreserving() {
+        return true;
+    }
+
     @Override
     public byte[] getXattr(Inode inode, String attr) throws IOException {
         long inodeNumber = toInodeNumber(inode);