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-rw-r--r--uts/common/fs/zfs/sys/spa.h706
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diff --git a/uts/common/fs/zfs/sys/spa.h b/uts/common/fs/zfs/sys/spa.h
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@@ -0,0 +1,706 @@
+/*
+ * 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; \
+ \
+ 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 (int 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();
+
+/* 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 */