patch-2.4.20 linux-2.4.20/fs/intermezzo/journal_tmpfs.c

• Lines: 110
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/fs/intermezzo/journal_tmpfs.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/fs/intermezzo/journal_tmpfs.c linux-2.4.20/fs/intermezzo/journal_tmpfs.c
@@ -0,0 +1,109 @@
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ *  Copyright (C) 1998 Peter J. Braam <braam@clusterfs.com>
+ *  Copyright (C) 2000 Red Hat, Inc.
+ *  Copyright (C) 2000 Los Alamos National Laboratory
+ *  Copyright (C) 2000 TurboLinux, Inc.
+ *  Copyright (C) 2001 Mountain View Data, Inc.
+ *  Copyright (C) 2001 Tacit Networks, Inc. <phil@off.net>
+ *
+ *   This file is part of InterMezzo, http://www.inter-mezzo.org.
+ *
+ *   InterMezzo is free software; you can redistribute it and/or
+ *   modify it under the terms of version 2 of the GNU General Public
+ *   License as published by the Free Software Foundation.
+ *
+ *   InterMezzo is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with InterMezzo; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/types.h>
+#include <linux/param.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/locks.h>
+#include <asm/segment.h>
+#include <asm/uaccess.h>
+#include <linux/string.h>
+#include <linux/smp_lock.h>
+#if defined(CONFIG_TMPFS)
+#include <linux/jbd.h>
+#if defined(CONFIG_EXT3)
+#include <linux/ext3_fs.h>
+#include <linux/ext3_jbd.h>
+#endif
+#endif
+
+#include <linux/intermezzo_fs.h>
+#include <linux/intermezzo_psdev.h>
+
+#if defined(CONFIG_TMPFS)
+
+/* space requirements: 
+   presto_do_truncate: 
+        used to truncate the KML forward to next fset->chunksize boundary
+          - zero partial block
+          - update inode
+   presto_write_record: 
+        write header (< one block) 
+        write one path (< MAX_PATHLEN) 
+        possibly write another path (< MAX_PATHLEN)
+        write suffix (< one block) 
+   presto_update_last_rcvd
+        write one block
+*/
+
+static loff_t presto_tmpfs_freespace(struct presto_cache *cache,
+                                         struct super_block *sb)
+{
+        return (1<<30);
+}
+
+/* start the filesystem journal operations */
+static void *presto_tmpfs_trans_start(struct presto_file_set *fset, 
+                                   struct inode *inode, 
+                                   int op)
+{
+        return (void *)1; 
+}
+
+static void presto_tmpfs_trans_commit(struct presto_file_set *fset, void *handle)
+{
+        return;
+}
+
+static void presto_tmpfs_journal_file_data(struct inode *inode)
+{
+        return; 
+}
+
+/* The logic here is a slightly modified version of ext3/inode.c:block_to_path
+ */
+static int presto_tmpfs_has_all_data(struct inode *inode)
+{
+        return 0;
+}
+
+struct journal_ops presto_tmpfs_journal_ops = {
+        tr_all_data: presto_tmpfs_has_all_data,
+        tr_avail: presto_tmpfs_freespace,
+        tr_start:  presto_tmpfs_trans_start,
+        tr_commit: presto_tmpfs_trans_commit,
+        tr_journal_data: presto_tmpfs_journal_file_data,
+        tr_ilookup: presto_tmpfs_ilookup,
+        tr_add_ilookup: presto_add_ilookup_dentry
+};
+
+#endif /* CONFIG_EXT3_FS */