cifs: convert the path to utf16 in smb2_query_info_compound

and not in the callers.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: Ronnie Sahlberg

fs/cifs/smb2ops.c

@@ -1192,17 +1192,12 @@ smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 	       struct cifs_sb_info *cifs_sb)
 {
 	int rc;
-	__le16 *utf16_path;
 	struct kvec rsp_iov = {NULL, 0};
 	int buftype = CIFS_NO_BUFFER;
 	struct smb2_query_info_rsp *rsp;
 	struct smb2_file_full_ea_info *info = NULL;
 
-	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
-	if (!utf16_path)
-		return -ENOMEM;
-
-	rc = smb2_query_info_compound(xid, tcon, utf16_path,
+	rc = smb2_query_info_compound(xid, tcon, path,
 				      FILE_READ_EA,
 				      FILE_FULL_EA_INFORMATION,
 				      SMB2_O_INFO_FILE,
@@ -1235,7 +1230,6 @@ smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 			le32_to_cpu(rsp->OutputBufferLength), ea_name);
 
  qeas_exit:
-	kfree(utf16_path);
 	free_rsp_buf(buftype, rsp_iov.iov_base);
 	return rc;
 }
@@ -1295,7 +1289,7 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 			 * the new EA. If not we should not add it since we
 			 * would not be able to even read the EAs back.
 			 */
-			rc = smb2_query_info_compound(xid, tcon, utf16_path,
+			rc = smb2_query_info_compound(xid, tcon, path,
 				      FILE_READ_EA,
 				      FILE_FULL_EA_INFORMATION,
 				      SMB2_O_INFO_FILE,
@@ -2646,7 +2640,7 @@ smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
  */
 int
 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
-			 __le16 *utf16_path, u32 desired_access,
+			 const char *path, u32 desired_access,
 			 u32 class, u32 type, u32 output_len,
 			 struct kvec *rsp, int *buftype,
 			 struct cifs_sb_info *cifs_sb)
@@ -2664,6 +2658,13 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
 	struct cifs_open_parms oparms;
 	struct cifs_fid fid;
 	int rc;
+	__le16 *utf16_path;
+
+	if (!path)
+		path = "";
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
 
 	if (smb3_encryption_required(tcon))
 		flags |= CIFS_TRANSFORM_REQ;
@@ -2729,6 +2730,7 @@ smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
 	*buftype = resp_buftype[1];
 
  qic_exit:
+	kfree(utf16_path);
 	SMB2_open_free(&rqst[0]);
 	SMB2_query_info_free(&rqst[1]);
 	SMB2_close_free(&rqst[2]);
@@ -2743,13 +2745,12 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 {
 	struct smb2_query_info_rsp *rsp;
 	struct smb2_fs_full_size_info *info = NULL;
-	__le16 utf16_path = 0; /* Null - open root of share */
 	struct kvec rsp_iov = {NULL, 0};
 	int buftype = CIFS_NO_BUFFER;
 	int rc;
 
 
-	rc = smb2_query_info_compound(xid, tcon, &utf16_path,
+	rc = smb2_query_info_compound(xid, tcon, "",
 				      FILE_READ_ATTRIBUTES,
 				      FS_FULL_SIZE_INFORMATION,
 				      SMB2_O_INFO_FILESYSTEM,

fs/cifs/smb2proto.h

@@ -283,7 +283,7 @@ extern int smb311_update_preauth_hash(struct cifs_ses *ses,
 				      struct kvec *iov, int nvec);
 extern int smb2_query_info_compound(const unsigned int xid,
 				    struct cifs_tcon *tcon,
-				    __le16 *utf16_path, u32 desired_access,
+				    const char *path, u32 desired_access,
 				    u32 class, u32 type, u32 output_len,
 				    struct kvec *rsp, int *buftype,
 				    struct cifs_sb_info *cifs_sb);