Add new API ntfs_attr_exist() that checks whether attribute with selected type and name already present in inode. (Szaka)

ChangeLog

@@ -2,9 +2,12 @@ xx/xx/2006 - x.xx.x - .
 
 	- ntfsmount now creates files and directories with security descriptor
 	  that grant full access to everyone.  (Yura)
+	- Fix typo that lead to incorrect sparse file size calculation.  (Yuval)
 	- Fix long standing stupendously stupid bug in libntfs/attrib.c::
 	  ntfs_external_attr_find() and also port a bugfix from the advanced
 	  ntfs kernel driver to the same function.  (Anton)
+	- Add new API ntfs_attr_exist() that checks whether attribute with
+	  selected type and name already present in inode.  (Szaka)
 
 21/06/2006 - 1.13.1 - Various fixes.
 

include/ntfs/attrib.h

@@ -317,6 +317,9 @@ extern int ntfs_attr_update_mapping_pairs(ntfs_attr *na, VCN from_vcn);
 
 extern int ntfs_attr_truncate(ntfs_attr *na, const s64 newsize);
 
+extern int ntfs_attr_exist(ntfs_inode *ni, const ATTR_TYPES type,
+		ntfschar *name, u32 name_len);
+
 // FIXME / TODO: Above here the file is cleaned up. (AIA)
 /**
  * get_attribute_value_length - return the length of the value of an attribute

libntfs/attrib.c

@@ -3,6 +3,7 @@
  *
  * Copyright (c) 2000-2006 Anton Altaparmakov
  * Copyright (c) 2002-2005 Richard Russon
+ * Copyright (c) 2002-2006 Szabolcs Szakacsits
  * Copyright (c) 2004-2006 Yura Pakhuchiy
  *
  * This program/include file is free software; you can redistribute it and/or
@@ -5057,3 +5058,24 @@ out:
 	return ret;
 }
 
+/**
+ * ntfs_attr_exist - FIXME: description
+ */
+int ntfs_attr_exist(ntfs_inode *ni, const ATTR_TYPES type, ntfschar *name,
+		u32 name_len)
+{
+	ntfs_attr_search_ctx *ctx;
+	int ret;
+	
+	ntfs_log_trace("Entering.\n");
+	
+	ctx = ntfs_attr_get_search_ctx(ni, NULL);
+	if (!ctx)
+		return 0;
+	
+	ret = ntfs_attr_lookup(type, name, name_len, CASE_SENSITIVE, 0, NULL, 0,
+			       ctx);
+
+	ntfs_attr_put_search_ctx(ctx);
+	return !ret;
+}