HAWQ-1721: FileStats does not contain FileId

* Add Fileid as part of FileStats and hdfsFileInfo.

Fileid is useful in uniquely identifying files and directories in HDFS. HdfsFileStatusProto has this field but it is not exposed as via library. It is an optional field and in case this field is not present, it default to 0.

depends/libhdfs3/src/client/FileStatus.h

@@ -33,7 +33,7 @@ class FileStatus {
 public:
     FileStatus() :
         isdir(false), atime(0), blocksize(0), length(0), mtime(
-            0), permission(0644), replications(0) {
+            0), permission(0644), replications(0), fileid(0) {
     }
 
     int64_t getAccessTime() const {
@@ -159,6 +159,18 @@ class FileStatus {
         return fileEncryption.getKey().length() > 0 && fileEncryption.getKeyName().length() > 0;
     }
 
+    /**
+     * Get FileID of hdfs file/directory
+     * @return fileid of file if present, else 0
+     */
+    int64_t getFileid() const {
+        return fileid;
+    }
+
+    void setFileid(int64_t fileid) {
+        this->fileid = fileid;
+    }
+
 private:
     bool isdir;
     int64_t atime;
@@ -172,6 +184,7 @@ class FileStatus {
     std::string path;
     std::string symlink;
     FileEncryptionInfo fileEncryption;
+    int64_t fileid;
 };
 
 }

depends/libhdfs3/src/client/Hdfs.cpp

@@ -1050,6 +1050,7 @@ static void ConstructHdfsFileInfo(hdfsFileInfo * infos,
         infos[i].mPermissions = status[i].getPermission().toShort();
         infos[i].mReplication = status[i].getReplication();
         infos[i].mSize = status[i].getLength();
+        infos[i].mFileid = status[i].getFileid();
         infos[i].mHdfsEncryptionFileInfo = NULL;
         if (status[i].isFileEncrypted()) {
              infos[i].mHdfsEncryptionFileInfo = new hdfsEncryptionFileInfo[1];

depends/libhdfs3/src/client/hdfs.h

@@ -552,6 +552,7 @@ typedef struct {
     short mPermissions; /* the permissions associated with the file */
     tTime mLastAccess; /* the last access time for the file in seconds */
     hdfsEncryptionFileInfo * mHdfsEncryptionFileInfo; /* the encryption info of the file/directory */
+    tOffset mFileid; /* Fileid associated with a file. Default value is 0*/
 } hdfsFileInfo;
 
 /**

depends/libhdfs3/src/server/RpcHelper.h

@@ -183,6 +183,7 @@ static inline void Convert(const std::string & src, FileStatus & fs,
     fs.setSymlink(proto.symlink().c_str());
     fs.setPermission(Permission(proto.permission().perm()));
     fs.setIsdir(proto.filetype() == HdfsFileStatusProto::IS_DIR);
+    fs.setFileid(proto.fileid());
 
     if (proto.has_fileencryptioninfo()){
         const FileEncryptionInfoProto &encrypt = proto.fileencryptioninfo();