xnu-792.24.17.tar.gz

[apple/xnu.git] / bsd / vfs / vfs_journal.h

diff --git a/bsd/vfs/vfs_journal.h b/bsd/vfs/vfs_journal.h
index 823cf3ac2ca03d0ab8b64f3198667256a5850024..b03209b9a768ed9ec1e4d7988e691ec30fe5f0b9 100644 (file)
--- a/bsd/vfs/vfs_journal.h
+++ b/bsd/vfs/vfs_journal.h
@@ -4,20 +4,19 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
  * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -203,6 +202,19 @@ journal  *journal_open(struct vnode *jvp,
                                           void        (*flush)(void *arg),
                                           void         *arg);
 
+/*
+ * Test whether the journal is clean or not.  This is intended
+ * to be used when you're mounting read-only.  If the journal
+ * is not clean for some reason then you should not mount the
+ * volume as your data structures may be in an unknown state.
+ */
+int journal_is_clean(struct vnode *jvp,
+                    off_t         offset,
+                    off_t         journal_size,
+                    struct vnode *fsvp,
+                     size_t        min_fs_block_size);
+
+
 /*
  * Call journal_close() just before your file system is unmounted.
  * It flushes any outstanding transactions and makes sure the