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, 151 insertions, 0 deletions

diff --git a/include/sys/dsl_pool.h b/include/sys/dsl_pool.h
new file mode 100644
index 000000000..7d25bd7c0
--- /dev/null
+++ b/include/sys/dsl_pool.h
@@ -0,0 +1,151 @@
+/*
+ * 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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	_SYS_DSL_POOL_H
+#define	_SYS_DSL_POOL_H
+
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/txg_impl.h>
+#include <sys/zfs_context.h>
+#include <sys/zio.h>
+#include <sys/dnode.h>
+#include <sys/ddt.h>
+#include <sys/arc.h>
+#include <sys/bpobj.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct objset;
+struct dsl_dir;
+struct dsl_dataset;
+struct dsl_pool;
+struct dmu_tx;
+struct dsl_scan;
+
+/* These macros are for indexing into the zfs_all_blkstats_t. */
+#define	DMU_OT_DEFERRED	DMU_OT_NONE
+#define	DMU_OT_TOTAL	DMU_OT_NUMTYPES
+
+typedef struct zfs_blkstat {
+	uint64_t	zb_count;
+	uint64_t	zb_asize;
+	uint64_t	zb_lsize;
+	uint64_t	zb_psize;
+	uint64_t	zb_gangs;
+	uint64_t	zb_ditto_2_of_2_samevdev;
+	uint64_t	zb_ditto_2_of_3_samevdev;
+	uint64_t	zb_ditto_3_of_3_samevdev;
+} zfs_blkstat_t;
+
+typedef struct zfs_all_blkstats {
+	zfs_blkstat_t	zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
+} zfs_all_blkstats_t;
+
+
+typedef struct dsl_pool {
+	/* Immutable */
+	spa_t *dp_spa;
+	struct objset *dp_meta_objset;
+	struct dsl_dir *dp_root_dir;
+	struct dsl_dir *dp_mos_dir;
+	struct dsl_dir *dp_free_dir;
+	struct dsl_dataset *dp_origin_snap;
+	uint64_t dp_root_dir_obj;
+	struct taskq *dp_vnrele_taskq;
+
+	/* No lock needed - sync context only */
+	blkptr_t dp_meta_rootbp;
+	list_t dp_synced_datasets;
+	hrtime_t dp_read_overhead;
+	uint64_t dp_throughput; /* bytes per millisec */
+	uint64_t dp_write_limit;
+	uint64_t dp_tmp_userrefs_obj;
+	bpobj_t dp_free_bpobj;
+
+	struct dsl_scan *dp_scan;
+
+	/* Uses dp_lock */
+	kmutex_t dp_lock;
+	uint64_t dp_space_towrite[TXG_SIZE];
+	uint64_t dp_tempreserved[TXG_SIZE];
+
+	/* Has its own locking */
+	tx_state_t dp_tx;
+	txg_list_t dp_dirty_datasets;
+	txg_list_t dp_dirty_dirs;
+	txg_list_t dp_sync_tasks;
+
+	/*
+	 * Protects administrative changes (properties, namespace)
+	 * It is only held for write in syncing context.  Therefore
+	 * syncing context does not need to ever have it for read, since
+	 * nobody else could possibly have it for write.
+	 */
+	krwlock_t dp_config_rwlock;
+
+	zfs_all_blkstats_t *dp_blkstats;
+} dsl_pool_t;
+
+int dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
+void dsl_pool_close(dsl_pool_t *dp);
+dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
+void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
+void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
+int dsl_pool_sync_context(dsl_pool_t *dp);
+uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
+uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
+int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx);
+void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
+void dsl_pool_memory_pressure(dsl_pool_t *dp);
+void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
+void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
+void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
+    const blkptr_t *bpp);
+int dsl_read(zio_t *pio, spa_t *spa, const blkptr_t *bpp, arc_buf_t *pbuf,
+    arc_done_func_t *done, void *private, int priority, int zio_flags,
+    uint32_t *arc_flags, const zbookmark_t *zb);
+int dsl_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bpp,
+    arc_done_func_t *done, void *private, int priority, int zio_flags,
+    uint32_t *arc_flags, const zbookmark_t *zb);
+void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
+void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
+void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
+
+taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
+
+extern int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
+    const char *tag, uint64_t *now, dmu_tx_t *tx);
+extern int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
+    const char *tag, dmu_tx_t *tx);
+extern void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
+int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif /* _SYS_DSL_POOL_H */