Add GEOM class "VFS" for filesystems and other buffer cache users

of GEOM devices.

There is nothing magic about this, it just gives a bufobj interface
to GEOM.

1 files changed, 42 insertions, 0 deletions

diff --git a/sys/geom/geom_vfs.h b/sys/geom/geom_vfs.h
new file mode 100644
index 0000000..6c2bacb
--- /dev/null
+++ b/sys/geom/geom_vfs.h
@@ -0,0 +1,42 @@
+/*-
+ * Copyright (c) 2004 Poul-Henning Kamp
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _GEOM_GEOM_VFS_H_
+#define _GEOM_GEOM_VFS_H_
+
+struct vnode;
+struct bufobj;
+struct buf;
+
+extern struct buf_ops *g_vfs_bufops;
+
+void g_vfs_strategy(struct bufobj *bo, struct buf *bp);
+void g_vfs_orphan(struct g_consumer *cp);
+int g_vfs_open(struct vnode *vp, struct g_consumer **cpp, const char *fsname, int wr);
+
+#endif /* _GEOM_GEOM_VFS_H_ */