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, 707 insertions, 0 deletions

diff --git a/include/sys/spa.h b/include/sys/spa.h
new file mode 100644
index 000000000..52737ebc2
--- /dev/null
+++ b/include/sys/spa.h
@@ -0,0 +1,707 @@
+/*
+ * 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_SPA_H
+#define	_SYS_SPA_H
+
+#include <sys/avl.h>
+#include <sys/zfs_context.h>
+#include <sys/nvpair.h>
+#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <sys/fs/zfs.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Forward references that lots of things need.
+ */
+typedef struct spa spa_t;
+typedef struct vdev vdev_t;
+typedef struct metaslab metaslab_t;
+typedef struct metaslab_group metaslab_group_t;
+typedef struct metaslab_class metaslab_class_t;
+typedef struct zio zio_t;
+typedef struct zilog zilog_t;
+typedef struct spa_aux_vdev spa_aux_vdev_t;
+typedef struct ddt ddt_t;
+typedef struct ddt_entry ddt_entry_t;
+struct dsl_pool;
+
+/*
+ * General-purpose 32-bit and 64-bit bitfield encodings.
+ */
+#define	BF32_DECODE(x, low, len)	P2PHASE((x) >> (low), 1U << (len))
+#define	BF64_DECODE(x, low, len)	P2PHASE((x) >> (low), 1ULL << (len))
+#define	BF32_ENCODE(x, low, len)	(P2PHASE((x), 1U << (len)) << (low))
+#define	BF64_ENCODE(x, low, len)	(P2PHASE((x), 1ULL << (len)) << (low))
+
+#define	BF32_GET(x, low, len)		BF32_DECODE(x, low, len)
+#define	BF64_GET(x, low, len)		BF64_DECODE(x, low, len)
+
+#define	BF32_SET(x, low, len, val)	\
+	((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
+#define	BF64_SET(x, low, len, val)	\
+	((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
+
+#define	BF32_GET_SB(x, low, len, shift, bias)	\
+	((BF32_GET(x, low, len) + (bias)) << (shift))
+#define	BF64_GET_SB(x, low, len, shift, bias)	\
+	((BF64_GET(x, low, len) + (bias)) << (shift))
+
+#define	BF32_SET_SB(x, low, len, shift, bias, val)	\
+	BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
+#define	BF64_SET_SB(x, low, len, shift, bias, val)	\
+	BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
+
+/*
+ * We currently support nine block sizes, from 512 bytes to 128K.
+ * We could go higher, but the benefits are near-zero and the cost
+ * of COWing a giant block to modify one byte would become excessive.
+ */
+#define	SPA_MINBLOCKSHIFT	9
+#define	SPA_MAXBLOCKSHIFT	17
+#define	SPA_MINBLOCKSIZE	(1ULL << SPA_MINBLOCKSHIFT)
+#define	SPA_MAXBLOCKSIZE	(1ULL << SPA_MAXBLOCKSHIFT)
+
+#define	SPA_BLOCKSIZES		(SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)
+
+/*
+ * Size of block to hold the configuration data (a packed nvlist)
+ */
+#define	SPA_CONFIG_BLOCKSIZE	(1 << 14)
+
+/*
+ * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
+ * The ASIZE encoding should be at least 64 times larger (6 more bits)
+ * to support up to 4-way RAID-Z mirror mode with worst-case gang block
+ * overhead, three DVAs per bp, plus one more bit in case we do anything
+ * else that expands the ASIZE.
+ */
+#define	SPA_LSIZEBITS		16	/* LSIZE up to 32M (2^16 * 512)	*/
+#define	SPA_PSIZEBITS		16	/* PSIZE up to 32M (2^16 * 512)	*/
+#define	SPA_ASIZEBITS		24	/* ASIZE up to 64 times larger	*/
+
+/*
+ * All SPA data is represented by 128-bit data virtual addresses (DVAs).
+ * The members of the dva_t should be considered opaque outside the SPA.
+ */
+typedef struct dva {
+	uint64_t	dva_word[2];
+} dva_t;
+
+/*
+ * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
+ */
+typedef struct zio_cksum {
+	uint64_t	zc_word[4];
+} zio_cksum_t;
+
+/*
+ * Each block is described by its DVAs, time of birth, checksum, etc.
+ * The word-by-word, bit-by-bit layout of the blkptr is as follows:
+ *
+ *	64	56	48	40	32	24	16	8	0
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 0	|		vdev1		| GRID  |	  ASIZE		|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 1	|G|			 offset1				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 2	|		vdev2		| GRID  |	  ASIZE		|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 3	|G|			 offset2				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 4	|		vdev3		| GRID  |	  ASIZE		|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 5	|G|			 offset3				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 6	|BDX|lvl| type	| cksum | comp	|     PSIZE	|     LSIZE	|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 7	|			padding					|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 8	|			padding					|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * 9	|			physical birth txg			|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * a	|			logical birth txg			|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * b	|			fill count				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * c	|			checksum[0]				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * d	|			checksum[1]				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * e	|			checksum[2]				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ * f	|			checksum[3]				|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ *
+ * Legend:
+ *
+ * vdev		virtual device ID
+ * offset	offset into virtual device
+ * LSIZE	logical size
+ * PSIZE	physical size (after compression)
+ * ASIZE	allocated size (including RAID-Z parity and gang block headers)
+ * GRID		RAID-Z layout information (reserved for future use)
+ * cksum	checksum function
+ * comp		compression function
+ * G		gang block indicator
+ * B		byteorder (endianness)
+ * D		dedup
+ * X		unused
+ * lvl		level of indirection
+ * type		DMU object type
+ * phys birth	txg of block allocation; zero if same as logical birth txg
+ * log. birth	transaction group in which the block was logically born
+ * fill count	number of non-zero blocks under this bp
+ * checksum[4]	256-bit checksum of the data this bp describes
+ */
+#define	SPA_BLKPTRSHIFT	7		/* blkptr_t is 128 bytes	*/
+#define	SPA_DVAS_PER_BP	3		/* Number of DVAs in a bp	*/
+
+typedef struct blkptr {
+	dva_t		blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
+	uint64_t	blk_prop;	/* size, compression, type, etc	    */
+	uint64_t	blk_pad[2];	/* Extra space for the future	    */
+	uint64_t	blk_phys_birth;	/* txg when block was allocated	    */
+	uint64_t	blk_birth;	/* transaction group at birth	    */
+	uint64_t	blk_fill;	/* fill count			    */
+	zio_cksum_t	blk_cksum;	/* 256-bit checksum		    */
+} blkptr_t;
+
+/*
+ * Macros to get and set fields in a bp or DVA.
+ */
+#define	DVA_GET_ASIZE(dva)	\
+	BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
+#define	DVA_SET_ASIZE(dva, x)	\
+	BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)
+
+#define	DVA_GET_GRID(dva)	BF64_GET((dva)->dva_word[0], 24, 8)
+#define	DVA_SET_GRID(dva, x)	BF64_SET((dva)->dva_word[0], 24, 8, x)
+
+#define	DVA_GET_VDEV(dva)	BF64_GET((dva)->dva_word[0], 32, 32)
+#define	DVA_SET_VDEV(dva, x)	BF64_SET((dva)->dva_word[0], 32, 32, x)
+
+#define	DVA_GET_OFFSET(dva)	\
+	BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
+#define	DVA_SET_OFFSET(dva, x)	\
+	BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
+
+#define	DVA_GET_GANG(dva)	BF64_GET((dva)->dva_word[1], 63, 1)
+#define	DVA_SET_GANG(dva, x)	BF64_SET((dva)->dva_word[1], 63, 1, x)
+
+#define	BP_GET_LSIZE(bp)	\
+	BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
+#define	BP_SET_LSIZE(bp, x)	\
+	BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
+
+#define	BP_GET_PSIZE(bp)	\
+	BF64_GET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
+#define	BP_SET_PSIZE(bp, x)	\
+	BF64_SET_SB((bp)->blk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
+
+#define	BP_GET_COMPRESS(bp)		BF64_GET((bp)->blk_prop, 32, 8)
+#define	BP_SET_COMPRESS(bp, x)		BF64_SET((bp)->blk_prop, 32, 8, x)
+
+#define	BP_GET_CHECKSUM(bp)		BF64_GET((bp)->blk_prop, 40, 8)
+#define	BP_SET_CHECKSUM(bp, x)		BF64_SET((bp)->blk_prop, 40, 8, x)
+
+#define	BP_GET_TYPE(bp)			BF64_GET((bp)->blk_prop, 48, 8)
+#define	BP_SET_TYPE(bp, x)		BF64_SET((bp)->blk_prop, 48, 8, x)
+
+#define	BP_GET_LEVEL(bp)		BF64_GET((bp)->blk_prop, 56, 5)
+#define	BP_SET_LEVEL(bp, x)		BF64_SET((bp)->blk_prop, 56, 5, x)
+
+#define	BP_GET_PROP_BIT_61(bp)		BF64_GET((bp)->blk_prop, 61, 1)
+#define	BP_SET_PROP_BIT_61(bp, x)	BF64_SET((bp)->blk_prop, 61, 1, x)
+
+#define	BP_GET_DEDUP(bp)		BF64_GET((bp)->blk_prop, 62, 1)
+#define	BP_SET_DEDUP(bp, x)		BF64_SET((bp)->blk_prop, 62, 1, x)
+
+#define	BP_GET_BYTEORDER(bp)		(0 - BF64_GET((bp)->blk_prop, 63, 1))
+#define	BP_SET_BYTEORDER(bp, x)		BF64_SET((bp)->blk_prop, 63, 1, x)
+
+#define	BP_PHYSICAL_BIRTH(bp)		\
+	((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
+
+#define	BP_SET_BIRTH(bp, logical, physical)	\
+{						\
+	(bp)->blk_birth = (logical);		\
+	(bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
+}
+
+#define	BP_GET_ASIZE(bp)	\
+	(DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
+		DVA_GET_ASIZE(&(bp)->blk_dva[2]))
+
+#define	BP_GET_UCSIZE(bp) \
+	((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \
+	BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
+
+#define	BP_GET_NDVAS(bp)	\
+	(!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
+	!!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
+	!!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
+
+#define	BP_COUNT_GANG(bp)	\
+	(DVA_GET_GANG(&(bp)->blk_dva[0]) + \
+	DVA_GET_GANG(&(bp)->blk_dva[1]) + \
+	DVA_GET_GANG(&(bp)->blk_dva[2]))
+
+#define	DVA_EQUAL(dva1, dva2)	\
+	((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
+	(dva1)->dva_word[0] == (dva2)->dva_word[0])
+
+#define	BP_EQUAL(bp1, bp2)	\
+	(BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) &&	\
+	DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) &&	\
+	DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) &&	\
+	DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
+
+#define	ZIO_CHECKSUM_EQUAL(zc1, zc2) \
+	(0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
+	((zc1).zc_word[1] - (zc2).zc_word[1]) | \
+	((zc1).zc_word[2] - (zc2).zc_word[2]) | \
+	((zc1).zc_word[3] - (zc2).zc_word[3])))
+
+#define	DVA_IS_VALID(dva)	(DVA_GET_ASIZE(dva) != 0)
+
+#define	ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3)	\
+{						\
+	(zcp)->zc_word[0] = w0;			\
+	(zcp)->zc_word[1] = w1;			\
+	(zcp)->zc_word[2] = w2;			\
+	(zcp)->zc_word[3] = w3;			\
+}
+
+#define	BP_IDENTITY(bp)		(&(bp)->blk_dva[0])
+#define	BP_IS_GANG(bp)		DVA_GET_GANG(BP_IDENTITY(bp))
+#define	BP_IS_HOLE(bp)		((bp)->blk_birth == 0)
+
+/* BP_IS_RAIDZ(bp) assumes no block compression */
+#define	BP_IS_RAIDZ(bp)		(DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
+				BP_GET_PSIZE(bp))
+
+#define	BP_ZERO(bp)				\
+{						\
+	(bp)->blk_dva[0].dva_word[0] = 0;	\
+	(bp)->blk_dva[0].dva_word[1] = 0;	\
+	(bp)->blk_dva[1].dva_word[0] = 0;	\
+	(bp)->blk_dva[1].dva_word[1] = 0;	\
+	(bp)->blk_dva[2].dva_word[0] = 0;	\
+	(bp)->blk_dva[2].dva_word[1] = 0;	\
+	(bp)->blk_prop = 0;			\
+	(bp)->blk_pad[0] = 0;			\
+	(bp)->blk_pad[1] = 0;			\
+	(bp)->blk_phys_birth = 0;		\
+	(bp)->blk_birth = 0;			\
+	(bp)->blk_fill = 0;			\
+	ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0);	\
+}
+
+/*
+ * Note: the byteorder is either 0 or -1, both of which are palindromes.
+ * This simplifies the endianness handling a bit.
+ */
+#ifdef _BIG_ENDIAN
+#define	ZFS_HOST_BYTEORDER	(0ULL)
+#else
+#define	ZFS_HOST_BYTEORDER	(-1ULL)
+#endif
+
+#define	BP_SHOULD_BYTESWAP(bp)	(BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
+
+#define	BP_SPRINTF_LEN	320
+
+/*
+ * This macro allows code sharing between zfs, libzpool, and mdb.
+ * 'func' is either snprintf() or mdb_snprintf().
+ * 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
+ */
+#define	SPRINTF_BLKPTR(func, ws, buf, bp, type, checksum, compress)	\
+{									\
+	static const char *copyname[] =					\
+	    { "zero", "single", "double", "triple" };			\
+	int size = BP_SPRINTF_LEN;					\
+	int len = 0;							\
+	int copies = 0;							\
+	int d;								\
+									\
+	if (bp == NULL) {						\
+		len = func(buf + len, size - len, "<NULL>");		\
+	} else if (BP_IS_HOLE(bp)) {					\
+		len = func(buf + len, size - len, "<hole>");		\
+	} else {							\
+		for (d = 0; d < BP_GET_NDVAS(bp); d++) {		\
+			const dva_t *dva = &bp->blk_dva[d];		\
+			if (DVA_IS_VALID(dva))				\
+				copies++;				\
+			len += func(buf + len, size - len,		\
+			    "DVA[%d]=<%llu:%llx:%llx>%c", d,		\
+			    (u_longlong_t)DVA_GET_VDEV(dva),		\
+			    (u_longlong_t)DVA_GET_OFFSET(dva),		\
+			    (u_longlong_t)DVA_GET_ASIZE(dva),		\
+			    ws);					\
+		}							\
+		if (BP_IS_GANG(bp) &&					\
+		    DVA_GET_ASIZE(&bp->blk_dva[2]) <=			\
+		    DVA_GET_ASIZE(&bp->blk_dva[1]) / 2)			\
+			copies--;					\
+		len += func(buf + len, size - len,			\
+		    "[L%llu %s] %s %s %s %s %s %s%c"			\
+		    "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c"	\
+		    "cksum=%llx:%llx:%llx:%llx",			\
+		    (u_longlong_t)BP_GET_LEVEL(bp),			\
+		    type,						\
+		    checksum,						\
+		    compress,						\
+		    BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE",		\
+		    BP_IS_GANG(bp) ? "gang" : "contiguous",		\
+		    BP_GET_DEDUP(bp) ? "dedup" : "unique",		\
+		    copyname[copies],					\
+		    ws,							\
+		    (u_longlong_t)BP_GET_LSIZE(bp),			\
+		    (u_longlong_t)BP_GET_PSIZE(bp),			\
+		    (u_longlong_t)bp->blk_birth,			\
+		    (u_longlong_t)BP_PHYSICAL_BIRTH(bp),		\
+		    (u_longlong_t)bp->blk_fill,				\
+		    ws,							\
+		    (u_longlong_t)bp->blk_cksum.zc_word[0],		\
+		    (u_longlong_t)bp->blk_cksum.zc_word[1],		\
+		    (u_longlong_t)bp->blk_cksum.zc_word[2],		\
+		    (u_longlong_t)bp->blk_cksum.zc_word[3]);		\
+	}								\
+	ASSERT(len < size);						\
+}
+
+#include <sys/dmu.h>
+
+#define	BP_GET_BUFC_TYPE(bp)						\
+	(((BP_GET_LEVEL(bp) > 0) || (dmu_ot[BP_GET_TYPE(bp)].ot_metadata)) ? \
+	ARC_BUFC_METADATA : ARC_BUFC_DATA);
+
+typedef enum spa_import_type {
+	SPA_IMPORT_EXISTING,
+	SPA_IMPORT_ASSEMBLE
+} spa_import_type_t;
+
+/* state manipulation functions */
+extern int spa_open(const char *pool, spa_t **, void *tag);
+extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
+    nvlist_t *policy, nvlist_t **config);
+extern int spa_get_stats(const char *pool, nvlist_t **config,
+    char *altroot, size_t buflen);
+extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
+    const char *history_str, nvlist_t *zplprops);
+extern int spa_import_rootpool(char *devpath, char *devid);
+extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props,
+    uint64_t flags);
+extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
+extern int spa_destroy(char *pool);
+extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
+    boolean_t hardforce);
+extern int spa_reset(char *pool);
+extern void spa_async_request(spa_t *spa, int flag);
+extern void spa_async_unrequest(spa_t *spa, int flag);
+extern void spa_async_suspend(spa_t *spa);
+extern void spa_async_resume(spa_t *spa);
+extern spa_t *spa_inject_addref(char *pool);
+extern void spa_inject_delref(spa_t *spa);
+extern void spa_scan_stat_init(spa_t *spa);
+extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps);
+
+#define	SPA_ASYNC_CONFIG_UPDATE	0x01
+#define	SPA_ASYNC_REMOVE	0x02
+#define	SPA_ASYNC_PROBE		0x04
+#define	SPA_ASYNC_RESILVER_DONE	0x08
+#define	SPA_ASYNC_RESILVER	0x10
+#define	SPA_ASYNC_AUTOEXPAND	0x20
+#define	SPA_ASYNC_REMOVE_DONE	0x40
+#define	SPA_ASYNC_REMOVE_STOP	0x80
+
+/*
+ * Controls the behavior of spa_vdev_remove().
+ */
+#define	SPA_REMOVE_UNSPARE	0x01
+#define	SPA_REMOVE_DONE		0x02
+
+/* device manipulation */
+extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
+extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
+    int replacing);
+extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid,
+    int replace_done);
+extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
+extern boolean_t spa_vdev_remove_active(spa_t *spa);
+extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
+extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru);
+extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
+    nvlist_t *props, boolean_t exp);
+
+/* spare state (which is global across all pools) */
+extern void spa_spare_add(vdev_t *vd);
+extern void spa_spare_remove(vdev_t *vd);
+extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
+extern void spa_spare_activate(vdev_t *vd);
+
+/* L2ARC state (which is global across all pools) */
+extern void spa_l2cache_add(vdev_t *vd);
+extern void spa_l2cache_remove(vdev_t *vd);
+extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
+extern void spa_l2cache_activate(vdev_t *vd);
+extern void spa_l2cache_drop(spa_t *spa);
+
+/* scanning */
+extern int spa_scan(spa_t *spa, pool_scan_func_t func);
+extern int spa_scan_stop(spa_t *spa);
+
+/* spa syncing */
+extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
+extern void spa_sync_allpools(void);
+
+/*
+ * DEFERRED_FREE must be large enough that regular blocks are not
+ * deferred.  XXX so can't we change it back to 1?
+ */
+#define	SYNC_PASS_DEFERRED_FREE	2	/* defer frees after this pass */
+#define	SYNC_PASS_DONT_COMPRESS	4	/* don't compress after this pass */
+#define	SYNC_PASS_REWRITE	1	/* rewrite new bps after this pass */
+
+/* spa namespace global mutex */
+extern kmutex_t spa_namespace_lock;
+
+/*
+ * SPA configuration functions in spa_config.c
+ */
+
+#define	SPA_CONFIG_UPDATE_POOL	0
+#define	SPA_CONFIG_UPDATE_VDEVS	1
+
+extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
+extern void spa_config_load(void);
+extern nvlist_t *spa_all_configs(uint64_t *);
+extern void spa_config_set(spa_t *spa, nvlist_t *config);
+extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
+    int getstats);
+extern void spa_config_update(spa_t *spa, int what);
+
+/*
+ * Miscellaneous SPA routines in spa_misc.c
+ */
+
+/* Namespace manipulation */
+extern spa_t *spa_lookup(const char *name);
+extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot);
+extern void spa_remove(spa_t *spa);
+extern spa_t *spa_next(spa_t *prev);
+
+/* Refcount functions */
+extern void spa_open_ref(spa_t *spa, void *tag);
+extern void spa_close(spa_t *spa, void *tag);
+extern boolean_t spa_refcount_zero(spa_t *spa);
+
+#define	SCL_NONE	0x00
+#define	SCL_CONFIG	0x01
+#define	SCL_STATE	0x02
+#define	SCL_L2ARC	0x04		/* hack until L2ARC 2.0 */
+#define	SCL_ALLOC	0x08
+#define	SCL_ZIO		0x10
+#define	SCL_FREE	0x20
+#define	SCL_VDEV	0x40
+#define	SCL_LOCKS	7
+#define	SCL_ALL		((1 << SCL_LOCKS) - 1)
+#define	SCL_STATE_ALL	(SCL_STATE | SCL_L2ARC | SCL_ZIO)
+
+/* Pool configuration locks */
+extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
+extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
+extern void spa_config_exit(spa_t *spa, int locks, void *tag);
+extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
+
+/* Pool vdev add/remove lock */
+extern uint64_t spa_vdev_enter(spa_t *spa);
+extern uint64_t spa_vdev_config_enter(spa_t *spa);
+extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg,
+    int error, char *tag);
+extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
+
+/* Pool vdev state change lock */
+extern void spa_vdev_state_enter(spa_t *spa, int oplock);
+extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
+
+/* Log state */
+typedef enum spa_log_state {
+	SPA_LOG_UNKNOWN = 0,	/* unknown log state */
+	SPA_LOG_MISSING,	/* missing log(s) */
+	SPA_LOG_CLEAR,		/* clear the log(s) */
+	SPA_LOG_GOOD,		/* log(s) are good */
+} spa_log_state_t;
+
+extern spa_log_state_t spa_get_log_state(spa_t *spa);
+extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
+extern int spa_offline_log(spa_t *spa);
+
+/* Log claim callback */
+extern void spa_claim_notify(zio_t *zio);
+
+/* Accessor functions */
+extern boolean_t spa_shutting_down(spa_t *spa);
+extern struct dsl_pool *spa_get_dsl(spa_t *spa);
+extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
+extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
+extern void spa_altroot(spa_t *, char *, size_t);
+extern int spa_sync_pass(spa_t *spa);
+extern char *spa_name(spa_t *spa);
+extern uint64_t spa_guid(spa_t *spa);
+extern uint64_t spa_last_synced_txg(spa_t *spa);
+extern uint64_t spa_first_txg(spa_t *spa);
+extern uint64_t spa_syncing_txg(spa_t *spa);
+extern uint64_t spa_version(spa_t *spa);
+extern pool_state_t spa_state(spa_t *spa);
+extern spa_load_state_t spa_load_state(spa_t *spa);
+extern uint64_t spa_freeze_txg(spa_t *spa);
+extern uint64_t spa_get_asize(spa_t *spa, uint64_t lsize);
+extern uint64_t spa_get_dspace(spa_t *spa);
+extern void spa_update_dspace(spa_t *spa);
+extern uint64_t spa_version(spa_t *spa);
+extern boolean_t spa_deflate(spa_t *spa);
+extern metaslab_class_t *spa_normal_class(spa_t *spa);
+extern metaslab_class_t *spa_log_class(spa_t *spa);
+extern int spa_max_replication(spa_t *spa);
+extern int spa_prev_software_version(spa_t *spa);
+extern int spa_busy(void);
+extern uint8_t spa_get_failmode(spa_t *spa);
+extern boolean_t spa_suspended(spa_t *spa);
+extern uint64_t spa_bootfs(spa_t *spa);
+extern uint64_t spa_delegation(spa_t *spa);
+extern objset_t *spa_meta_objset(spa_t *spa);
+
+/* Miscellaneous support routines */
+extern int spa_rename(const char *oldname, const char *newname);
+extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid);
+extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
+extern char *spa_strdup(const char *);
+extern void spa_strfree(char *);
+extern uint64_t spa_get_random(uint64_t range);
+extern uint64_t spa_generate_guid(spa_t *spa);
+extern void sprintf_blkptr(char *buf, const blkptr_t *bp);
+extern void spa_freeze(spa_t *spa);
+extern void spa_upgrade(spa_t *spa, uint64_t version);
+extern void spa_evict_all(void);
+extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
+    boolean_t l2cache);
+extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
+extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva);
+extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp);
+extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp);
+extern boolean_t spa_has_slogs(spa_t *spa);
+extern boolean_t spa_is_root(spa_t *spa);
+extern boolean_t spa_writeable(spa_t *spa);
+
+extern int spa_mode(spa_t *spa);
+extern uint64_t strtonum(const char *str, char **nptr);
+
+/* history logging */
+typedef enum history_log_type {
+	LOG_CMD_POOL_CREATE,
+	LOG_CMD_NORMAL,
+	LOG_INTERNAL
+} history_log_type_t;
+
+typedef struct history_arg {
+	char *ha_history_str;
+	history_log_type_t ha_log_type;
+	history_internal_events_t ha_event;
+	char *ha_zone;
+	uid_t ha_uid;
+} history_arg_t;
+
+extern char *spa_his_ievent_table[];
+
+extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
+extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
+    char *his_buf);
+extern int spa_history_log(spa_t *spa, const char *his_buf,
+    history_log_type_t what);
+extern void spa_history_log_internal(history_internal_events_t event,
+    spa_t *spa, dmu_tx_t *tx, const char *fmt, ...);
+extern void spa_history_log_version(spa_t *spa, history_internal_events_t evt);
+
+/* error handling */
+struct zbookmark;
+extern void spa_log_error(spa_t *spa, zio_t *zio);
+extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
+    zio_t *zio, uint64_t stateoroffset, uint64_t length);
+extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
+extern void zfs_post_state_change(spa_t *spa, vdev_t *vd);
+extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
+extern uint64_t spa_get_errlog_size(spa_t *spa);
+extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
+extern void spa_errlog_rotate(spa_t *spa);
+extern void spa_errlog_drain(spa_t *spa);
+extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
+extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
+
+/* vdev cache */
+extern void vdev_cache_stat_init(void);
+extern void vdev_cache_stat_fini(void);
+
+/* Initialization and termination */
+extern void spa_init(int flags);
+extern void spa_fini(void);
+extern void spa_boot_init(void);
+
+/* properties */
+extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
+extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
+extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
+extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
+
+/* asynchronous event notification */
+extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
+
+#ifdef ZFS_DEBUG
+#define	dprintf_bp(bp, fmt, ...) do {				\
+	if (zfs_flags & ZFS_DEBUG_DPRINTF) { 			\
+	char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP);	\
+	sprintf_blkptr(__blkbuf, (bp));				\
+	dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf);		\
+	kmem_free(__blkbuf, BP_SPRINTF_LEN);			\
+	} \
+_NOTE(CONSTCOND) } while (0)
+#else
+#define	dprintf_bp(bp, fmt, ...)
+#endif
+
+extern int spa_mode_global;			/* mode, e.g. FREAD | FWRITE */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_SPA_H */