Update core ZFS code from build 121 to build 141.

1 files changed, 246 insertions, 0 deletions

diff --git a/module/zfs/include/sys/ddt.h b/module/zfs/include/sys/ddt.h
new file mode 100644
index 000000000..9724d6ece
--- /dev/null
+++ b/module/zfs/include/sys/ddt.h
@@ -0,0 +1,246 @@
+/*
+ * 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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_DDT_H
+#define	_SYS_DDT_H
+
+#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <sys/fs/zfs.h>
+#include <sys/zio.h>
+#include <sys/dmu.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * On-disk DDT formats, in the desired search order (newest version first).
+ */
+enum ddt_type {
+	DDT_TYPE_ZAP = 0,
+	DDT_TYPES
+};
+
+/*
+ * DDT classes, in the desired search order (highest replication level first).
+ */
+enum ddt_class {
+	DDT_CLASS_DITTO = 0,
+	DDT_CLASS_DUPLICATE,
+	DDT_CLASS_UNIQUE,
+	DDT_CLASSES
+};
+
+#define	DDT_TYPE_CURRENT		0
+
+#define	DDT_COMPRESS_BYTEORDER_MASK	0x80
+#define	DDT_COMPRESS_FUNCTION_MASK	0x7f
+
+/*
+ * On-disk ddt entry:  key (name) and physical storage (value).
+ */
+typedef struct ddt_key {
+	zio_cksum_t	ddk_cksum;	/* 256-bit block checksum */
+	uint64_t	ddk_prop;	/* LSIZE, PSIZE, compression */
+} ddt_key_t;
+
+/*
+ * ddk_prop layout:
+ *
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ *	|   0	|   0	|   0	| comp	|     PSIZE	|     LSIZE	|
+ *	+-------+-------+-------+-------+-------+-------+-------+-------+
+ */
+#define	DDK_GET_LSIZE(ddk)	\
+	BF64_GET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
+#define	DDK_SET_LSIZE(ddk, x)	\
+	BF64_SET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
+
+#define	DDK_GET_PSIZE(ddk)	\
+	BF64_GET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
+#define	DDK_SET_PSIZE(ddk, x)	\
+	BF64_SET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
+
+#define	DDK_GET_COMPRESS(ddk)		BF64_GET((ddk)->ddk_prop, 32, 8)
+#define	DDK_SET_COMPRESS(ddk, x)	BF64_SET((ddk)->ddk_prop, 32, 8, x)
+
+#define	DDT_KEY_WORDS	(sizeof (ddt_key_t) / sizeof (uint64_t))
+
+typedef struct ddt_phys {
+	dva_t		ddp_dva[SPA_DVAS_PER_BP];
+	uint64_t	ddp_refcnt;
+	uint64_t	ddp_phys_birth;
+} ddt_phys_t;
+
+enum ddt_phys_type {
+	DDT_PHYS_DITTO = 0,
+	DDT_PHYS_SINGLE = 1,
+	DDT_PHYS_DOUBLE = 2,
+	DDT_PHYS_TRIPLE = 3,
+	DDT_PHYS_TYPES
+};
+
+/*
+ * In-core ddt entry
+ */
+struct ddt_entry {
+	ddt_key_t	dde_key;
+	ddt_phys_t	dde_phys[DDT_PHYS_TYPES];
+	zio_t		*dde_lead_zio[DDT_PHYS_TYPES];
+	void		*dde_repair_data;
+	enum ddt_type	dde_type;
+	enum ddt_class	dde_class;
+	uint8_t		dde_loading;
+	uint8_t		dde_loaded;
+	kcondvar_t	dde_cv;
+	avl_node_t	dde_node;
+};
+
+/*
+ * In-core ddt
+ */
+struct ddt {
+	kmutex_t	ddt_lock;
+	avl_tree_t	ddt_tree;
+	avl_tree_t	ddt_repair_tree;
+	enum zio_checksum ddt_checksum;
+	spa_t		*ddt_spa;
+	objset_t	*ddt_os;
+	uint64_t	ddt_stat_object;
+	uint64_t	ddt_object[DDT_TYPES][DDT_CLASSES];
+	ddt_histogram_t	ddt_histogram[DDT_TYPES][DDT_CLASSES];
+	ddt_histogram_t	ddt_histogram_cache[DDT_TYPES][DDT_CLASSES];
+	ddt_object_t	ddt_object_stats[DDT_TYPES][DDT_CLASSES];
+	avl_node_t	ddt_node;
+};
+
+/*
+ * In-core and on-disk bookmark for DDT walks
+ */
+typedef struct ddt_bookmark {
+	uint64_t	ddb_class;
+	uint64_t	ddb_type;
+	uint64_t	ddb_checksum;
+	uint64_t	ddb_cursor;
+} ddt_bookmark_t;
+
+/*
+ * Ops vector to access a specific DDT object type.
+ */
+typedef struct ddt_ops {
+	char ddt_op_name[32];
+	int (*ddt_op_create)(objset_t *os, uint64_t *object, dmu_tx_t *tx,
+	    boolean_t prehash);
+	int (*ddt_op_destroy)(objset_t *os, uint64_t object, dmu_tx_t *tx);
+	int (*ddt_op_lookup)(objset_t *os, uint64_t object, ddt_entry_t *dde);
+	void (*ddt_op_prefetch)(objset_t *os, uint64_t object,
+	    ddt_entry_t *dde);
+	int (*ddt_op_update)(objset_t *os, uint64_t object, ddt_entry_t *dde,
+	    dmu_tx_t *tx);
+	int (*ddt_op_remove)(objset_t *os, uint64_t object, ddt_entry_t *dde,
+	    dmu_tx_t *tx);
+	int (*ddt_op_walk)(objset_t *os, uint64_t object, ddt_entry_t *dde,
+	    uint64_t *walk);
+	uint64_t (*ddt_op_count)(objset_t *os, uint64_t object);
+} ddt_ops_t;
+
+#define	DDT_NAMELEN	80
+
+extern void ddt_object_name(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class, char *name);
+extern int ddt_object_walk(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class, uint64_t *walk, ddt_entry_t *dde);
+extern uint64_t ddt_object_count(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class);
+extern int ddt_object_info(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class, dmu_object_info_t *);
+extern boolean_t ddt_object_exists(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class);
+
+extern void ddt_bp_fill(const ddt_phys_t *ddp, blkptr_t *bp,
+    uint64_t txg);
+extern void ddt_bp_create(enum zio_checksum checksum, const ddt_key_t *ddk,
+    const ddt_phys_t *ddp, blkptr_t *bp);
+
+extern void ddt_key_fill(ddt_key_t *ddk, const blkptr_t *bp);
+
+extern void ddt_phys_fill(ddt_phys_t *ddp, const blkptr_t *bp);
+extern void ddt_phys_clear(ddt_phys_t *ddp);
+extern void ddt_phys_addref(ddt_phys_t *ddp);
+extern void ddt_phys_decref(ddt_phys_t *ddp);
+extern void ddt_phys_free(ddt_t *ddt, ddt_key_t *ddk, ddt_phys_t *ddp,
+    uint64_t txg);
+extern ddt_phys_t *ddt_phys_select(const ddt_entry_t *dde, const blkptr_t *bp);
+extern uint64_t ddt_phys_total_refcnt(const ddt_entry_t *dde);
+
+extern void ddt_stat_add(ddt_stat_t *dst, const ddt_stat_t *src, uint64_t neg);
+
+extern void ddt_histogram_add(ddt_histogram_t *dst, const ddt_histogram_t *src);
+extern void ddt_histogram_stat(ddt_stat_t *dds, const ddt_histogram_t *ddh);
+extern boolean_t ddt_histogram_empty(const ddt_histogram_t *ddh);
+extern void ddt_get_dedup_object_stats(spa_t *spa, ddt_object_t *ddo);
+extern void ddt_get_dedup_histogram(spa_t *spa, ddt_histogram_t *ddh);
+extern void ddt_get_dedup_stats(spa_t *spa, ddt_stat_t *dds_total);
+
+extern uint64_t ddt_get_dedup_dspace(spa_t *spa);
+extern uint64_t ddt_get_pool_dedup_ratio(spa_t *spa);
+
+extern int ddt_ditto_copies_needed(ddt_t *ddt, ddt_entry_t *dde,
+    ddt_phys_t *ddp_willref);
+extern int ddt_ditto_copies_present(ddt_entry_t *dde);
+
+extern size_t ddt_compress(void *src, uchar_t *dst, size_t s_len, size_t d_len);
+extern void ddt_decompress(uchar_t *src, void *dst, size_t s_len, size_t d_len);
+
+extern ddt_t *ddt_select(spa_t *spa, const blkptr_t *bp);
+extern void ddt_enter(ddt_t *ddt);
+extern void ddt_exit(ddt_t *ddt);
+extern ddt_entry_t *ddt_lookup(ddt_t *ddt, const blkptr_t *bp, boolean_t add);
+extern void ddt_prefetch(spa_t *spa, const blkptr_t *bp);
+extern void ddt_remove(ddt_t *ddt, ddt_entry_t *dde);
+
+extern boolean_t ddt_class_contains(spa_t *spa, enum ddt_class max_class,
+    const blkptr_t *bp);
+
+extern ddt_entry_t *ddt_repair_start(ddt_t *ddt, const blkptr_t *bp);
+extern void ddt_repair_done(ddt_t *ddt, ddt_entry_t *dde);
+
+extern int ddt_entry_compare(const void *x1, const void *x2);
+
+extern void ddt_create(spa_t *spa);
+extern int ddt_load(spa_t *spa);
+extern void ddt_unload(spa_t *spa);
+extern void ddt_sync(spa_t *spa, uint64_t txg);
+extern int ddt_walk(spa_t *spa, ddt_bookmark_t *ddb, ddt_entry_t *dde);
+extern int ddt_object_update(ddt_t *ddt, enum ddt_type type,
+    enum ddt_class class, ddt_entry_t *dde, dmu_tx_t *tx);
+
+extern const ddt_ops_t ddt_zap_ops;
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_DDT_H */