}
public READDIRPLUS3Response readdirplus(XDR xdr,
SecurityHandler securityHandler, InetAddress client) {
if (!checkAccessPrivilege(client, AccessPrivilege.READ_ONLY)) {
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_ACCES);
}
DFSClient dfsClient = clientCache.getDfsClient(securityHandler.getUser());
if (dfsClient == null) {
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_SERVERFAULT);
}
READDIRPLUS3Request request = null;
try {
request = new READDIRPLUS3Request(xdr);
} catch (IOException e) {
LOG.error("Invalid READDIRPLUS request");
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_INVAL);
}
FileHandle handle = request.getHandle();
long cookie = request.getCookie();
if (cookie < 0) {
LOG.error("Invalid READDIRPLUS request, with negitve cookie:" + cookie);
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_INVAL);
}
long dirCount = request.getDirCount();
if (dirCount <= 0) {
LOG.info("Nonpositive dircount in invalid READDIRPLUS request:" + dirCount);
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_INVAL);
}
int maxCount = request.getMaxCount();
if (maxCount <= 0) {
LOG.info("Nonpositive maxcount in invalid READDIRPLUS request:" + maxCount);
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_INVAL);
}
if (LOG.isDebugEnabled()) {
LOG.debug("NFS READDIRPLUS fileId: " + handle.getFileId() + " cookie: "
+ cookie + " dirCount: " + dirCount + " maxCount: " + maxCount);
}
HdfsFileStatus dirStatus;
DirectoryListing dlisting = null;
Nfs3FileAttributes postOpDirAttr = null;
long dotdotFileId = 0;
try {
String dirFileIdPath = Nfs3Utils.getFileIdPath(handle);
dirStatus = dfsClient.getFileInfo(dirFileIdPath);
if (dirStatus == null) {
LOG.info("Can't get path for fileId:" + handle.getFileId());
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_STALE);
}
if (!dirStatus.isDir()) {
LOG.error("Can't readdirplus for regular file, fileId:"
+ handle.getFileId());
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_NOTDIR);
}
long cookieVerf = request.getCookieVerf();
if ((cookieVerf != 0) && (cookieVerf != dirStatus.getModificationTime())) {
LOG.error("CookierVerf mismatch. request cookierVerf:" + cookieVerf
+ " dir cookieVerf:" + dirStatus.getModificationTime());
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_BAD_COOKIE);
}
if (cookie == 0) {
// Get dotdot fileId
String dotdotFileIdPath = dirFileIdPath + "/..";
HdfsFileStatus dotdotStatus = dfsClient.getFileInfo(dotdotFileIdPath);
if (dotdotStatus == null) {
// This should not happen
throw new IOException("Can't get path for handle path:"
+ dotdotFileIdPath);
}
dotdotFileId = dotdotStatus.getFileId();
}
// Get the list from the resume point
byte[] startAfter;
if (cookie == 0) {
startAfter = HdfsFileStatus.EMPTY_NAME;
} else {
String inodeIdPath = Nfs3Utils.getFileIdPath(cookie);
startAfter = inodeIdPath.getBytes();
}
dlisting = listPaths(dfsClient, dirFileIdPath, startAfter);
postOpDirAttr = Nfs3Utils.getFileAttr(dfsClient, dirFileIdPath, iug);
if (postOpDirAttr == null) {
LOG.info("Can't get path for fileId:" + handle.getFileId());
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_STALE);
}
} catch (IOException e) {
LOG.warn("Exception ", e);
return new READDIRPLUS3Response(Nfs3Status.NFS3ERR_IO);
}
// Set up the dirents in the response
HdfsFileStatus[] fstatus = dlisting.getPartialListing();
int n = (int) Math.min(fstatus.length, dirCount-2);
boolean eof = (n < fstatus.length) ? false : (dlisting
.getRemainingEntries() == 0);
READDIRPLUS3Response.EntryPlus3[] entries;
if (cookie == 0) {
entries = new READDIRPLUS3Response.EntryPlus3[n+2];
entries[0] = new READDIRPLUS3Response.EntryPlus3(
postOpDirAttr.getFileId(), ".", 0, postOpDirAttr, new FileHandle(
postOpDirAttr.getFileId()));
entries[1] = new READDIRPLUS3Response.EntryPlus3(dotdotFileId, "..",
dotdotFileId, postOpDirAttr, new FileHandle(dotdotFileId));
for (int i = 2; i < n + 2; i++) {
long fileId = fstatus[i - 2].getFileId();
FileHandle childHandle = new FileHandle(fileId);
Nfs3FileAttributes attr;
try {
attr = writeManager.getFileAttr(dfsClient, childHandle, iug);
} catch (IOException e) {
LOG.error("Can't get file attributes for fileId:" + fileId, e);
continue;
}
entries[i] = new READDIRPLUS3Response.EntryPlus3(fileId,
fstatus[i - 2].getLocalName(), fileId, attr, childHandle);
}
} else {
// Resume from last readdirplus. If the cookie is "..", the result
// list is up the directory content since HDFS uses name as resume point.
entries = new READDIRPLUS3Response.EntryPlus3[n];
for (int i = 0; i < n; i++) {
long fileId = fstatus[i].getFileId();
FileHandle childHandle = new FileHandle(fileId);
Nfs3FileAttributes attr;
try {
attr = writeManager.getFileAttr(dfsClient, childHandle, iug);
} catch (IOException e) {
LOG.error("Can't get file attributes for fileId:" + fileId, e);
continue;
}
entries[i] = new READDIRPLUS3Response.EntryPlus3(fileId,
fstatus[i].getLocalName(), fileId, attr, childHandle);
}
}
DirListPlus3 dirListPlus = new READDIRPLUS3Response.DirListPlus3(entries,
eof);
return new READDIRPLUS3Response(Nfs3Status.NFS3_OK, postOpDirAttr,
dirStatus.getModificationTime(), dirListPlus);
}