/// <summary>Set xattr for a file or directory.</summary>
/// <param name="src">- path on which it sets the xattr</param>
/// <param name="xAttr">- xAttr details to set</param>
/// <param name="flag">- xAttrs flags</param>
/// <exception cref="System.IO.IOException"/>
internal static HdfsFileStatus SetXAttr(FSDirectory fsd, string src, XAttr xAttr,
EnumSet <XAttrSetFlag> flag, bool logRetryCache)
{
CheckXAttrsConfigFlag(fsd);
CheckXAttrSize(fsd, xAttr);
FSPermissionChecker pc = fsd.GetPermissionChecker();
XAttrPermissionFilter.CheckPermissionForApi(pc, xAttr, FSDirectory.IsReservedRawName
(src));
byte[][] pathComponents = FSDirectory.GetPathComponentsForReservedPath(src);
src = fsd.ResolvePath(pc, src, pathComponents);
IList <XAttr> xAttrs = Lists.NewArrayListWithCapacity(1);
xAttrs.AddItem(xAttr);
INodesInPath iip;
fsd.WriteLock();
try
{
iip = fsd.GetINodesInPath4Write(src);
CheckXAttrChangeAccess(fsd, iip, xAttr, pc);
UnprotectedSetXAttrs(fsd, src, xAttrs, flag);
}
finally
{
fsd.WriteUnlock();
}
fsd.GetEditLog().LogSetXAttrs(src, xAttrs, logRetryCache);
return(fsd.GetAuditFileInfo(iip));
}
/// <exception cref="System.IO.IOException"/>
internal static IList <XAttr> GetXAttrs(FSDirectory fsd, string srcArg, IList <XAttr
> xAttrs)
{
string src = srcArg;
CheckXAttrsConfigFlag(fsd);
FSPermissionChecker pc = fsd.GetPermissionChecker();
bool isRawPath = FSDirectory.IsReservedRawName(src);
bool getAll = xAttrs == null || xAttrs.IsEmpty();
if (!getAll)
{
XAttrPermissionFilter.CheckPermissionForApi(pc, xAttrs, isRawPath);
}
byte[][] pathComponents = FSDirectory.GetPathComponentsForReservedPath(src);
src = fsd.ResolvePath(pc, src, pathComponents);
INodesInPath iip = fsd.GetINodesInPath(src, true);
if (fsd.IsPermissionEnabled())
{
fsd.CheckPathAccess(pc, iip, FsAction.Read);
}
IList <XAttr> all = FSDirXAttrOp.GetXAttrs(fsd, src);
IList <XAttr> filteredAll = XAttrPermissionFilter.FilterXAttrsForApi(pc, all, isRawPath
);
if (getAll)
{
return(filteredAll);
}
if (filteredAll == null || filteredAll.IsEmpty())
{
return(null);
}
IList <XAttr> toGet = Lists.NewArrayListWithCapacity(xAttrs.Count);
foreach (XAttr xAttr in xAttrs)
{
bool foundIt = false;
foreach (XAttr a in filteredAll)
{
if (xAttr.GetNameSpace() == a.GetNameSpace() && xAttr.GetName().Equals(a.GetName(
)))
{
toGet.AddItem(a);
foundIt = true;
break;
}
}
if (!foundIt)
{
throw new IOException("At least one of the attributes provided was not found.");
}
}
return(toGet);
}
/// <exception cref="System.IO.IOException"/>
internal static IList <XAttr> ListXAttrs(FSDirectory fsd, string src)
{
FSDirXAttrOp.CheckXAttrsConfigFlag(fsd);
FSPermissionChecker pc = fsd.GetPermissionChecker();
bool isRawPath = FSDirectory.IsReservedRawName(src);
byte[][] pathComponents = FSDirectory.GetPathComponentsForReservedPath(src);
src = fsd.ResolvePath(pc, src, pathComponents);
INodesInPath iip = fsd.GetINodesInPath(src, true);
if (fsd.IsPermissionEnabled())
{
/* To access xattr names, you need EXECUTE in the owning directory. */
fsd.CheckParentAccess(pc, iip, FsAction.Execute);
}
IList <XAttr> all = FSDirXAttrOp.GetXAttrs(fsd, src);
return(XAttrPermissionFilter.FilterXAttrsForApi(pc, all, isRawPath));
}
/// <summary>Remove an xattr for a file or directory.</summary>
/// <param name="src">- path to remove the xattr from</param>
/// <param name="xAttr">- xAttr to remove</param>
/// <exception cref="System.IO.IOException"/>
internal static HdfsFileStatus RemoveXAttr(FSDirectory fsd, string src, XAttr xAttr
, bool logRetryCache)
{
FSDirXAttrOp.CheckXAttrsConfigFlag(fsd);
FSPermissionChecker pc = fsd.GetPermissionChecker();
XAttrPermissionFilter.CheckPermissionForApi(pc, xAttr, FSDirectory.IsReservedRawName
(src));
byte[][] pathComponents = FSDirectory.GetPathComponentsForReservedPath(src);
IList <XAttr> xAttrs = Lists.NewArrayListWithCapacity(1);
xAttrs.AddItem(xAttr);
INodesInPath iip;
fsd.WriteLock();
try
{
src = fsd.ResolvePath(pc, src, pathComponents);
iip = fsd.GetINodesInPath4Write(src);
CheckXAttrChangeAccess(fsd, iip, xAttr, pc);
IList <XAttr> removedXAttrs = UnprotectedRemoveXAttrs(fsd, src, xAttrs);
if (removedXAttrs != null && !removedXAttrs.IsEmpty())
{
fsd.GetEditLog().LogRemoveXAttrs(src, removedXAttrs, logRetryCache);
}
else
{
throw new IOException("No matching attributes found for remove operation");
}
}
finally
{
fsd.WriteUnlock();
}
return(fsd.GetAuditFileInfo(iip));
}
