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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2009-04-07 06:01:25 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-07 19:31:13 +0400
commita60be987d45dd510aeb54389526f9957cfab106c (patch)
treeffe680785f1f7d4e4096cd211e37bcfeaccafc63 /fs/nilfs2/btnode.h
parent36a580eb489f54d81a0534974962e732a314b999 (diff)
downloadlinux-a60be987d45dd510aeb54389526f9957cfab106c.tar.xz
nilfs2: B-tree node cache
This adds routines for B-tree node buffers. Signed-off-by: Seiji Kihara <kihara.seiji@lab.ntt.co.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/btnode.h')
-rw-r--r--fs/nilfs2/btnode.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/fs/nilfs2/btnode.h b/fs/nilfs2/btnode.h
new file mode 100644
index 000000000000..35faa86444a7
--- /dev/null
+++ b/fs/nilfs2/btnode.h
@@ -0,0 +1,58 @@
+/*
+ * btnode.h - NILFS B-tree node cache
+ *
+ * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Written by Seiji Kihara <kihara@osrg.net>
+ * Revised by Ryusuke Konishi <ryusuke@osrg.net>
+ */
+
+#ifndef _NILFS_BTNODE_H
+#define _NILFS_BTNODE_H
+
+#include <linux/types.h>
+#include <linux/buffer_head.h>
+#include <linux/fs.h>
+#include <linux/backing-dev.h>
+
+
+struct nilfs_btnode_chkey_ctxt {
+ __u64 oldkey;
+ __u64 newkey;
+ struct buffer_head *bh;
+ struct buffer_head *newbh;
+};
+
+void nilfs_btnode_cache_init_once(struct address_space *);
+void nilfs_btnode_cache_init(struct address_space *);
+void nilfs_btnode_cache_clear(struct address_space *);
+int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t,
+ struct buffer_head **, int);
+int nilfs_btnode_get(struct address_space *, __u64, sector_t,
+ struct buffer_head **, int);
+void nilfs_btnode_delete(struct buffer_head *);
+int nilfs_btnode_prepare_change_key(struct address_space *,
+ struct nilfs_btnode_chkey_ctxt *);
+void nilfs_btnode_commit_change_key(struct address_space *,
+ struct nilfs_btnode_chkey_ctxt *);
+void nilfs_btnode_abort_change_key(struct address_space *,
+ struct nilfs_btnode_chkey_ctxt *);
+
+#define nilfs_btnode_mark_dirty(bh) nilfs_mark_buffer_dirty(bh)
+
+
+#endif /* _NILFS_BTNODE_H */