/// <summary>Create a snapshot</summary>
/// <param name="snapshotRoot">The directory path where the snapshot is taken</param>
/// <param name="snapshotName">The name of the snapshot</param>
/// <exception cref="System.IO.IOException"/>
internal static string CreateSnapshot(FSDirectory fsd, SnapshotManager snapshotManager
, string snapshotRoot, string snapshotName, bool logRetryCache)
{
INodesInPath iip = fsd.GetINodesInPath4Write(snapshotRoot);
if (fsd.IsPermissionEnabled())
{
FSPermissionChecker pc = fsd.GetPermissionChecker();
fsd.CheckOwner(pc, iip);
}
if (snapshotName == null || snapshotName.IsEmpty())
{
snapshotName = Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot.GenerateDefaultSnapshotName
();
}
else
{
if (!DFSUtil.IsValidNameForComponent(snapshotName))
{
throw new InvalidPathException("Invalid snapshot name: " + snapshotName);
}
}
string snapshotPath = null;
VerifySnapshotName(fsd, snapshotName, snapshotRoot);
fsd.WriteLock();
try
{
snapshotPath = snapshotManager.CreateSnapshot(iip, snapshotRoot, snapshotName);
}
finally
{
fsd.WriteUnlock();
}
fsd.GetEditLog().LogCreateSnapshot(snapshotRoot, snapshotName, logRetryCache);
return(snapshotPath);
}
public long CreateSnapshot([FromBody] CreateSnapshotContract data)
{
m_authorizationManager.AuthorizeBook(data.ProjectId, PermissionFlag.EditProject);
return(m_snapshotManager.CreateSnapshot(data));
}