Support custom build directories and move includes

One of the neat tricks an autoconf style project is capable of
is allow configurion/building in a directory other than the
source directory.  The major advantage to this is that you can
build the project various different ways while making changes
in a single source tree.

For example, this project is designed to work on various different
Linux distributions each of which work slightly differently.  This
means that changes need to verified on each of those supported
distributions perferably before the change is committed to the
public git repo.

Using nfs and custom build directories makes this much easier.
I now have a single source tree in nfs mounted on several different
systems each running a supported distribution.  When I make a
change to the source base I suspect may break things I can
concurrently build from the same source on all the systems each
in their own subdirectory.

wget -c http://github.com/downloads/behlendorf/zfs/zfs-x.y.z.tar.gz
tar -xzf zfs-x.y.z.tar.gz
cd zfs-x-y-z

------------------------- run concurrently ----------------------
<ubuntu system>  <fedora system>  <debian system>  <rhel6 system>
mkdir ubuntu     mkdir fedora     mkdir debian     mkdir rhel6
cd ubuntu        cd fedora        cd debian        cd rhel6
../configure     ../configure     ../configure     ../configure
make             make             make             make
make check       make check       make check       make check

This change also moves many of the include headers from individual
incude/sys directories under the modules directory in to a single
top level include directory.  This has the advantage of making
the build rules cleaner and logically it makes a bit more sense.

1 files changed, 91 insertions, 0 deletions

diff --git a/include/sys/bpobj.h b/include/sys/bpobj.h
new file mode 100644
index 000000000..3771a9541
--- /dev/null
+++ b/include/sys/bpobj.h
@@ -0,0 +1,91 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_BPOBJ_H
+#define	_SYS_BPOBJ_H
+
+#include <sys/dmu.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/zio.h>
+#include <sys/zfs_context.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+typedef struct bpobj_phys {
+	/*
+	 * This is the bonus buffer for the dead lists.  The object's
+	 * contents is an array of bpo_entries blkptr_t's, representing
+	 * a total of bpo_bytes physical space.
+	 */
+	uint64_t	bpo_num_blkptrs;
+	uint64_t	bpo_bytes;
+	uint64_t	bpo_comp;
+	uint64_t	bpo_uncomp;
+	uint64_t	bpo_subobjs;
+	uint64_t	bpo_num_subobjs;
+} bpobj_phys_t;
+
+#define	BPOBJ_SIZE_V0	(2 * sizeof (uint64_t))
+#define	BPOBJ_SIZE_V1	(4 * sizeof (uint64_t))
+
+typedef struct bpobj {
+	kmutex_t	bpo_lock;
+	objset_t	*bpo_os;
+	uint64_t	bpo_object;
+	int		bpo_epb;
+	uint8_t		bpo_havecomp;
+	uint8_t		bpo_havesubobj;
+	bpobj_phys_t	*bpo_phys;
+	dmu_buf_t	*bpo_dbuf;
+	dmu_buf_t	*bpo_cached_dbuf;
+} bpobj_t;
+
+typedef int bpobj_itor_t(void *arg, const blkptr_t *bp, dmu_tx_t *tx);
+
+uint64_t bpobj_alloc(objset_t *mos, int blocksize, dmu_tx_t *tx);
+void bpobj_free(objset_t *os, uint64_t obj, dmu_tx_t *tx);
+
+int bpobj_open(bpobj_t *bpo, objset_t *mos, uint64_t object);
+void bpobj_close(bpobj_t *bpo);
+
+int bpobj_iterate(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx);
+int bpobj_iterate_nofree(bpobj_t *bpo, bpobj_itor_t func, void *, dmu_tx_t *);
+int bpobj_iterate_dbg(bpobj_t *bpo, uint64_t *itorp, blkptr_t *bp);
+
+void bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx);
+void bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, dmu_tx_t *tx);
+
+int bpobj_space(bpobj_t *bpo,
+    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
+int bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg,
+    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_BPOBJ_H */