aboutsummaryrefslogtreecommitdiffstats
path: root/uts/common/fs/zfs/sys/zio.h
diff options
context:
space:
mode:
Diffstat (limited to 'uts/common/fs/zfs/sys/zio.h')
-rw-r--r--uts/common/fs/zfs/sys/zio.h559
1 files changed, 559 insertions, 0 deletions
diff --git a/uts/common/fs/zfs/sys/zio.h b/uts/common/fs/zfs/sys/zio.h
new file mode 100644
index 000000000000..97d8ec74d2e9
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zio.h
@@ -0,0 +1,559 @@
+/*
+ * 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 _ZIO_H
+#define _ZIO_H
+
+#include <sys/zfs_context.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/avl.h>
+#include <sys/fs/zfs.h>
+#include <sys/zio_impl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Embedded checksum
+ */
+#define ZEC_MAGIC 0x210da7ab10c7a11ULL
+
+typedef struct zio_eck {
+ uint64_t zec_magic; /* for validation, endianness */
+ zio_cksum_t zec_cksum; /* 256-bit checksum */
+} zio_eck_t;
+
+/*
+ * Gang block headers are self-checksumming and contain an array
+ * of block pointers.
+ */
+#define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE
+#define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \
+ sizeof (zio_eck_t)) / sizeof (blkptr_t))
+#define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \
+ sizeof (zio_eck_t) - \
+ (SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
+ sizeof (uint64_t))
+
+typedef struct zio_gbh {
+ blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS];
+ uint64_t zg_filler[SPA_GBH_FILLER];
+ zio_eck_t zg_tail;
+} zio_gbh_phys_t;
+
+enum zio_checksum {
+ ZIO_CHECKSUM_INHERIT = 0,
+ ZIO_CHECKSUM_ON,
+ ZIO_CHECKSUM_OFF,
+ ZIO_CHECKSUM_LABEL,
+ ZIO_CHECKSUM_GANG_HEADER,
+ ZIO_CHECKSUM_ZILOG,
+ ZIO_CHECKSUM_FLETCHER_2,
+ ZIO_CHECKSUM_FLETCHER_4,
+ ZIO_CHECKSUM_SHA256,
+ ZIO_CHECKSUM_ZILOG2,
+ ZIO_CHECKSUM_FUNCTIONS
+};
+
+#define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4
+#define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
+
+#define ZIO_CHECKSUM_MASK 0xffULL
+#define ZIO_CHECKSUM_VERIFY (1 << 8)
+
+#define ZIO_DEDUPCHECKSUM ZIO_CHECKSUM_SHA256
+#define ZIO_DEDUPDITTO_MIN 100
+
+enum zio_compress {
+ ZIO_COMPRESS_INHERIT = 0,
+ ZIO_COMPRESS_ON,
+ ZIO_COMPRESS_OFF,
+ ZIO_COMPRESS_LZJB,
+ ZIO_COMPRESS_EMPTY,
+ ZIO_COMPRESS_GZIP_1,
+ ZIO_COMPRESS_GZIP_2,
+ ZIO_COMPRESS_GZIP_3,
+ ZIO_COMPRESS_GZIP_4,
+ ZIO_COMPRESS_GZIP_5,
+ ZIO_COMPRESS_GZIP_6,
+ ZIO_COMPRESS_GZIP_7,
+ ZIO_COMPRESS_GZIP_8,
+ ZIO_COMPRESS_GZIP_9,
+ ZIO_COMPRESS_ZLE,
+ ZIO_COMPRESS_FUNCTIONS
+};
+
+#define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB
+#define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF
+
+#define BOOTFS_COMPRESS_VALID(compress) \
+ ((compress) == ZIO_COMPRESS_LZJB || \
+ ((compress) == ZIO_COMPRESS_ON && \
+ ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \
+ (compress) == ZIO_COMPRESS_OFF)
+
+#define ZIO_FAILURE_MODE_WAIT 0
+#define ZIO_FAILURE_MODE_CONTINUE 1
+#define ZIO_FAILURE_MODE_PANIC 2
+
+#define ZIO_PRIORITY_NOW (zio_priority_table[0])
+#define ZIO_PRIORITY_SYNC_READ (zio_priority_table[1])
+#define ZIO_PRIORITY_SYNC_WRITE (zio_priority_table[2])
+#define ZIO_PRIORITY_LOG_WRITE (zio_priority_table[3])
+#define ZIO_PRIORITY_CACHE_FILL (zio_priority_table[4])
+#define ZIO_PRIORITY_AGG (zio_priority_table[5])
+#define ZIO_PRIORITY_FREE (zio_priority_table[6])
+#define ZIO_PRIORITY_ASYNC_WRITE (zio_priority_table[7])
+#define ZIO_PRIORITY_ASYNC_READ (zio_priority_table[8])
+#define ZIO_PRIORITY_RESILVER (zio_priority_table[9])
+#define ZIO_PRIORITY_SCRUB (zio_priority_table[10])
+#define ZIO_PRIORITY_DDT_PREFETCH (zio_priority_table[11])
+#define ZIO_PRIORITY_TABLE_SIZE 12
+
+#define ZIO_PIPELINE_CONTINUE 0x100
+#define ZIO_PIPELINE_STOP 0x101
+
+enum zio_flag {
+ /*
+ * Flags inherited by gang, ddt, and vdev children,
+ * and that must be equal for two zios to aggregate
+ */
+ ZIO_FLAG_DONT_AGGREGATE = 1 << 0,
+ ZIO_FLAG_IO_REPAIR = 1 << 1,
+ ZIO_FLAG_SELF_HEAL = 1 << 2,
+ ZIO_FLAG_RESILVER = 1 << 3,
+ ZIO_FLAG_SCRUB = 1 << 4,
+ ZIO_FLAG_SCAN_THREAD = 1 << 5,
+
+#define ZIO_FLAG_AGG_INHERIT (ZIO_FLAG_CANFAIL - 1)
+
+ /*
+ * Flags inherited by ddt, gang, and vdev children.
+ */
+ ZIO_FLAG_CANFAIL = 1 << 6, /* must be first for INHERIT */
+ ZIO_FLAG_SPECULATIVE = 1 << 7,
+ ZIO_FLAG_CONFIG_WRITER = 1 << 8,
+ ZIO_FLAG_DONT_RETRY = 1 << 9,
+ ZIO_FLAG_DONT_CACHE = 1 << 10,
+ ZIO_FLAG_NODATA = 1 << 11,
+ ZIO_FLAG_INDUCE_DAMAGE = 1 << 12,
+
+#define ZIO_FLAG_DDT_INHERIT (ZIO_FLAG_IO_RETRY - 1)
+#define ZIO_FLAG_GANG_INHERIT (ZIO_FLAG_IO_RETRY - 1)
+
+ /*
+ * Flags inherited by vdev children.
+ */
+ ZIO_FLAG_IO_RETRY = 1 << 13, /* must be first for INHERIT */
+ ZIO_FLAG_PROBE = 1 << 14,
+ ZIO_FLAG_TRYHARD = 1 << 15,
+ ZIO_FLAG_OPTIONAL = 1 << 16,
+
+#define ZIO_FLAG_VDEV_INHERIT (ZIO_FLAG_DONT_QUEUE - 1)
+
+ /*
+ * Flags not inherited by any children.
+ */
+ ZIO_FLAG_DONT_QUEUE = 1 << 17, /* must be first for INHERIT */
+ ZIO_FLAG_DONT_PROPAGATE = 1 << 18,
+ ZIO_FLAG_IO_BYPASS = 1 << 19,
+ ZIO_FLAG_IO_REWRITE = 1 << 20,
+ ZIO_FLAG_RAW = 1 << 21,
+ ZIO_FLAG_GANG_CHILD = 1 << 22,
+ ZIO_FLAG_DDT_CHILD = 1 << 23,
+ ZIO_FLAG_GODFATHER = 1 << 24
+};
+
+#define ZIO_FLAG_MUSTSUCCEED 0
+
+#define ZIO_DDT_CHILD_FLAGS(zio) \
+ (((zio)->io_flags & ZIO_FLAG_DDT_INHERIT) | \
+ ZIO_FLAG_DDT_CHILD | ZIO_FLAG_CANFAIL)
+
+#define ZIO_GANG_CHILD_FLAGS(zio) \
+ (((zio)->io_flags & ZIO_FLAG_GANG_INHERIT) | \
+ ZIO_FLAG_GANG_CHILD | ZIO_FLAG_CANFAIL)
+
+#define ZIO_VDEV_CHILD_FLAGS(zio) \
+ (((zio)->io_flags & ZIO_FLAG_VDEV_INHERIT) | \
+ ZIO_FLAG_CANFAIL)
+
+enum zio_child {
+ ZIO_CHILD_VDEV = 0,
+ ZIO_CHILD_GANG,
+ ZIO_CHILD_DDT,
+ ZIO_CHILD_LOGICAL,
+ ZIO_CHILD_TYPES
+};
+
+enum zio_wait_type {
+ ZIO_WAIT_READY = 0,
+ ZIO_WAIT_DONE,
+ ZIO_WAIT_TYPES
+};
+
+/*
+ * We'll take the unused errnos, 'EBADE' and 'EBADR' (from the Convergent
+ * graveyard) to indicate checksum errors and fragmentation.
+ */
+#define ECKSUM EBADE
+#define EFRAGS EBADR
+
+typedef void zio_done_func_t(zio_t *zio);
+
+extern uint8_t zio_priority_table[ZIO_PRIORITY_TABLE_SIZE];
+extern char *zio_type_name[ZIO_TYPES];
+
+/*
+ * A bookmark is a four-tuple <objset, object, level, blkid> that uniquely
+ * identifies any block in the pool. By convention, the meta-objset (MOS)
+ * is objset 0, and the meta-dnode is object 0. This covers all blocks
+ * except root blocks and ZIL blocks, which are defined as follows:
+ *
+ * Root blocks (objset_phys_t) are object 0, level -1: <objset, 0, -1, 0>.
+ * ZIL blocks are bookmarked <objset, 0, -2, blkid == ZIL sequence number>.
+ * dmu_sync()ed ZIL data blocks are bookmarked <objset, object, -2, blkid>.
+ *
+ * Note: this structure is called a bookmark because its original purpose
+ * was to remember where to resume a pool-wide traverse.
+ *
+ * Note: this structure is passed between userland and the kernel.
+ * Therefore it must not change size or alignment between 32/64 bit
+ * compilation options.
+ */
+typedef struct zbookmark {
+ uint64_t zb_objset;
+ uint64_t zb_object;
+ int64_t zb_level;
+ uint64_t zb_blkid;
+} zbookmark_t;
+
+#define SET_BOOKMARK(zb, objset, object, level, blkid) \
+{ \
+ (zb)->zb_objset = objset; \
+ (zb)->zb_object = object; \
+ (zb)->zb_level = level; \
+ (zb)->zb_blkid = blkid; \
+}
+
+#define ZB_DESTROYED_OBJSET (-1ULL)
+
+#define ZB_ROOT_OBJECT (0ULL)
+#define ZB_ROOT_LEVEL (-1LL)
+#define ZB_ROOT_BLKID (0ULL)
+
+#define ZB_ZIL_OBJECT (0ULL)
+#define ZB_ZIL_LEVEL (-2LL)
+
+typedef struct zio_prop {
+ enum zio_checksum zp_checksum;
+ enum zio_compress zp_compress;
+ dmu_object_type_t zp_type;
+ uint8_t zp_level;
+ uint8_t zp_copies;
+ uint8_t zp_dedup;
+ uint8_t zp_dedup_verify;
+} zio_prop_t;
+
+typedef struct zio_cksum_report zio_cksum_report_t;
+
+typedef void zio_cksum_finish_f(zio_cksum_report_t *rep,
+ const void *good_data);
+typedef void zio_cksum_free_f(void *cbdata, size_t size);
+
+struct zio_bad_cksum; /* defined in zio_checksum.h */
+
+struct zio_cksum_report {
+ struct zio_cksum_report *zcr_next;
+ nvlist_t *zcr_ereport;
+ nvlist_t *zcr_detector;
+ void *zcr_cbdata;
+ size_t zcr_cbinfo; /* passed to zcr_free() */
+ uint64_t zcr_align;
+ uint64_t zcr_length;
+ zio_cksum_finish_f *zcr_finish;
+ zio_cksum_free_f *zcr_free;
+
+ /* internal use only */
+ struct zio_bad_cksum *zcr_ckinfo; /* information from failure */
+};
+
+typedef void zio_vsd_cksum_report_f(zio_t *zio, zio_cksum_report_t *zcr,
+ void *arg);
+
+zio_vsd_cksum_report_f zio_vsd_default_cksum_report;
+
+typedef struct zio_vsd_ops {
+ zio_done_func_t *vsd_free;
+ zio_vsd_cksum_report_f *vsd_cksum_report;
+} zio_vsd_ops_t;
+
+typedef struct zio_gang_node {
+ zio_gbh_phys_t *gn_gbh;
+ struct zio_gang_node *gn_child[SPA_GBH_NBLKPTRS];
+} zio_gang_node_t;
+
+typedef zio_t *zio_gang_issue_func_t(zio_t *zio, blkptr_t *bp,
+ zio_gang_node_t *gn, void *data);
+
+typedef void zio_transform_func_t(zio_t *zio, void *data, uint64_t size);
+
+typedef struct zio_transform {
+ void *zt_orig_data;
+ uint64_t zt_orig_size;
+ uint64_t zt_bufsize;
+ zio_transform_func_t *zt_transform;
+ struct zio_transform *zt_next;
+} zio_transform_t;
+
+typedef int zio_pipe_stage_t(zio_t *zio);
+
+/*
+ * The io_reexecute flags are distinct from io_flags because the child must
+ * be able to propagate them to the parent. The normal io_flags are local
+ * to the zio, not protected by any lock, and not modifiable by children;
+ * the reexecute flags are protected by io_lock, modifiable by children,
+ * and always propagated -- even when ZIO_FLAG_DONT_PROPAGATE is set.
+ */
+#define ZIO_REEXECUTE_NOW 0x01
+#define ZIO_REEXECUTE_SUSPEND 0x02
+
+typedef struct zio_link {
+ zio_t *zl_parent;
+ zio_t *zl_child;
+ list_node_t zl_parent_node;
+ list_node_t zl_child_node;
+} zio_link_t;
+
+struct zio {
+ /* Core information about this I/O */
+ zbookmark_t io_bookmark;
+ zio_prop_t io_prop;
+ zio_type_t io_type;
+ enum zio_child io_child_type;
+ int io_cmd;
+ uint8_t io_priority;
+ uint8_t io_reexecute;
+ uint8_t io_state[ZIO_WAIT_TYPES];
+ uint64_t io_txg;
+ spa_t *io_spa;
+ blkptr_t *io_bp;
+ blkptr_t *io_bp_override;
+ blkptr_t io_bp_copy;
+ list_t io_parent_list;
+ list_t io_child_list;
+ zio_link_t *io_walk_link;
+ zio_t *io_logical;
+ zio_transform_t *io_transform_stack;
+
+ /* Callback info */
+ zio_done_func_t *io_ready;
+ zio_done_func_t *io_done;
+ void *io_private;
+ int64_t io_prev_space_delta; /* DMU private */
+ blkptr_t io_bp_orig;
+
+ /* Data represented by this I/O */
+ void *io_data;
+ void *io_orig_data;
+ uint64_t io_size;
+ uint64_t io_orig_size;
+
+ /* Stuff for the vdev stack */
+ vdev_t *io_vd;
+ void *io_vsd;
+ const zio_vsd_ops_t *io_vsd_ops;
+
+ uint64_t io_offset;
+ uint64_t io_deadline;
+ avl_node_t io_offset_node;
+ avl_node_t io_deadline_node;
+ avl_tree_t *io_vdev_tree;
+
+ /* Internal pipeline state */
+ enum zio_flag io_flags;
+ enum zio_stage io_stage;
+ enum zio_stage io_pipeline;
+ enum zio_flag io_orig_flags;
+ enum zio_stage io_orig_stage;
+ enum zio_stage io_orig_pipeline;
+ int io_error;
+ int io_child_error[ZIO_CHILD_TYPES];
+ uint64_t io_children[ZIO_CHILD_TYPES][ZIO_WAIT_TYPES];
+ uint64_t io_child_count;
+ uint64_t io_parent_count;
+ uint64_t *io_stall;
+ zio_t *io_gang_leader;
+ zio_gang_node_t *io_gang_tree;
+ void *io_executor;
+ void *io_waiter;
+ kmutex_t io_lock;
+ kcondvar_t io_cv;
+
+ /* FMA state */
+ zio_cksum_report_t *io_cksum_report;
+ uint64_t io_ena;
+};
+
+extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,
+ zio_done_func_t *done, void *private, enum zio_flag flags);
+
+extern zio_t *zio_root(spa_t *spa,
+ zio_done_func_t *done, void *private, enum zio_flag flags);
+
+extern zio_t *zio_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, void *data,
+ uint64_t size, zio_done_func_t *done, void *private,
+ int priority, enum zio_flag flags, const zbookmark_t *zb);
+
+extern zio_t *zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
+ void *data, uint64_t size, const zio_prop_t *zp,
+ zio_done_func_t *ready, zio_done_func_t *done, void *private,
+ int priority, enum zio_flag flags, const zbookmark_t *zb);
+
+extern zio_t *zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
+ void *data, uint64_t size, zio_done_func_t *done, void *private,
+ int priority, enum zio_flag flags, zbookmark_t *zb);
+
+extern void zio_write_override(zio_t *zio, blkptr_t *bp, int copies);
+
+extern void zio_free(spa_t *spa, uint64_t txg, const blkptr_t *bp);
+
+extern zio_t *zio_claim(zio_t *pio, spa_t *spa, uint64_t txg,
+ const blkptr_t *bp,
+ zio_done_func_t *done, void *private, enum zio_flag flags);
+
+extern zio_t *zio_ioctl(zio_t *pio, spa_t *spa, vdev_t *vd, int cmd,
+ zio_done_func_t *done, void *private, int priority, enum zio_flag flags);
+
+extern zio_t *zio_read_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
+ uint64_t size, void *data, int checksum,
+ zio_done_func_t *done, void *private, int priority, enum zio_flag flags,
+ boolean_t labels);
+
+extern zio_t *zio_write_phys(zio_t *pio, vdev_t *vd, uint64_t offset,
+ uint64_t size, void *data, int checksum,
+ zio_done_func_t *done, void *private, int priority, enum zio_flag flags,
+ boolean_t labels);
+
+extern zio_t *zio_free_sync(zio_t *pio, spa_t *spa, uint64_t txg,
+ const blkptr_t *bp, enum zio_flag flags);
+
+extern int zio_alloc_zil(spa_t *spa, uint64_t txg, blkptr_t *new_bp,
+ blkptr_t *old_bp, uint64_t size, boolean_t use_slog);
+extern void zio_free_zil(spa_t *spa, uint64_t txg, blkptr_t *bp);
+extern void zio_flush(zio_t *zio, vdev_t *vd);
+extern void zio_shrink(zio_t *zio, uint64_t size);
+
+extern int zio_wait(zio_t *zio);
+extern void zio_nowait(zio_t *zio);
+extern void zio_execute(zio_t *zio);
+extern void zio_interrupt(zio_t *zio);
+
+extern zio_t *zio_walk_parents(zio_t *cio);
+extern zio_t *zio_walk_children(zio_t *pio);
+extern zio_t *zio_unique_parent(zio_t *cio);
+extern void zio_add_child(zio_t *pio, zio_t *cio);
+
+extern void *zio_buf_alloc(size_t size);
+extern void zio_buf_free(void *buf, size_t size);
+extern void *zio_data_buf_alloc(size_t size);
+extern void zio_data_buf_free(void *buf, size_t size);
+
+extern void zio_resubmit_stage_async(void *);
+
+extern zio_t *zio_vdev_child_io(zio_t *zio, blkptr_t *bp, vdev_t *vd,
+ uint64_t offset, void *data, uint64_t size, int type, int priority,
+ enum zio_flag flags, zio_done_func_t *done, void *private);
+
+extern zio_t *zio_vdev_delegated_io(vdev_t *vd, uint64_t offset,
+ void *data, uint64_t size, int type, int priority,
+ enum zio_flag flags, zio_done_func_t *done, void *private);
+
+extern void zio_vdev_io_bypass(zio_t *zio);
+extern void zio_vdev_io_reissue(zio_t *zio);
+extern void zio_vdev_io_redone(zio_t *zio);
+
+extern void zio_checksum_verified(zio_t *zio);
+extern int zio_worst_error(int e1, int e2);
+
+extern enum zio_checksum zio_checksum_select(enum zio_checksum child,
+ enum zio_checksum parent);
+extern enum zio_checksum zio_checksum_dedup_select(spa_t *spa,
+ enum zio_checksum child, enum zio_checksum parent);
+extern enum zio_compress zio_compress_select(enum zio_compress child,
+ enum zio_compress parent);
+
+extern void zio_suspend(spa_t *spa, zio_t *zio);
+extern int zio_resume(spa_t *spa);
+extern void zio_resume_wait(spa_t *spa);
+
+/*
+ * Initial setup and teardown.
+ */
+extern void zio_init(void);
+extern void zio_fini(void);
+
+/*
+ * Fault injection
+ */
+struct zinject_record;
+extern uint32_t zio_injection_enabled;
+extern int zio_inject_fault(char *name, int flags, int *id,
+ struct zinject_record *record);
+extern int zio_inject_list_next(int *id, char *name, size_t buflen,
+ struct zinject_record *record);
+extern int zio_clear_fault(int id);
+extern void zio_handle_panic_injection(spa_t *spa, char *tag, uint64_t type);
+extern int zio_handle_fault_injection(zio_t *zio, int error);
+extern int zio_handle_device_injection(vdev_t *vd, zio_t *zio, int error);
+extern int zio_handle_label_injection(zio_t *zio, int error);
+extern void zio_handle_ignored_writes(zio_t *zio);
+
+/*
+ * Checksum ereport functions
+ */
+extern void zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd, struct zio *zio,
+ uint64_t offset, uint64_t length, void *arg, struct zio_bad_cksum *info);
+extern void zfs_ereport_finish_checksum(zio_cksum_report_t *report,
+ const void *good_data, const void *bad_data, boolean_t drop_if_identical);
+
+extern void zfs_ereport_send_interim_checksum(zio_cksum_report_t *report);
+extern void zfs_ereport_free_checksum(zio_cksum_report_t *report);
+
+/* If we have the good data in hand, this function can be used */
+extern void zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
+ struct zio *zio, uint64_t offset, uint64_t length,
+ const void *good_data, const void *bad_data, struct zio_bad_cksum *info);
+
+/* Called from spa_sync(), but primarily an injection handler */
+extern void spa_handle_ignored_writes(spa_t *spa);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ZIO_H */