dmu_tx.c revision fa9e4066f08beec538e775443c5be79dd423fcab
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER START
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * The contents of this file are subject to the terms of the
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Common Development and Distribution License, Version 1.0 only
fa9e4066f08beec538e775443c5be79dd423fcabahrens * (the "License"). You may not use this file except in compliance
fa9e4066f08beec538e775443c5be79dd423fcabahrens * with the License.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
fa9e4066f08beec538e775443c5be79dd423fcabahrens * or http://www.opensolaris.org/os/licensing.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * See the License for the specific language governing permissions
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fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * When distributing Covered Code, include this CDDL HEADER in each
fa9e4066f08beec538e775443c5be79dd423fcabahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * If applicable, add the following below this CDDL HEADER, with the
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fa9e4066f08beec538e775443c5be79dd423fcabahrens * information: Portions Copyright [yyyy] [name of copyright owner]
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER END
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Use is subject to license terms.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#pragma ident "%Z%%M% %I% %E% SMI"
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dmu.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dmu_impl.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dbuf.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dmu_tx.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dmu_objset.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dsl_dataset.h> /* for dsl_dataset_block_freeable() */
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dsl_dir.h> /* for dsl_dir_tempreserve_*() */
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dsl_pool.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zap_impl.h> /* for ZAP_BLOCK_SHIFT */
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/spa.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zfs_context.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef ZFS_DEBUG
fa9e4066f08beec538e775443c5be79dd423fcabahrensint dmu_use_tx_debug_bufs = 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_t *
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_create_ds(dsl_dir_t *dd)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_t *tx = kmem_zalloc(sizeof (dmu_tx_t), KM_SLEEP);
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_dir = dd;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dd)
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_pool = dd->dd_pool;
fa9e4066f08beec538e775443c5be79dd423fcabahrens list_create(&tx->tx_holds, sizeof (dmu_tx_hold_t),
fa9e4066f08beec538e775443c5be79dd423fcabahrens offsetof(dmu_tx_hold_t, dth_node));
fa9e4066f08beec538e775443c5be79dd423fcabahrens refcount_create(&tx->tx_space_written);
fa9e4066f08beec538e775443c5be79dd423fcabahrens refcount_create(&tx->tx_space_freed);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_t *
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_create(objset_t *os)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_t *tx = dmu_tx_create_ds(os->os->os_dsl_dataset->ds_dir);
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_objset = os;
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_t *
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_create_assigned(struct dsl_pool *dp, uint64_t txg)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_t *tx = dmu_tx_create_ds(NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(txg, <=, dp->dp_tx.tx_open_txg);
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_pool = dp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_txg = txg;
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_anyobj = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_is_syncing(dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (tx->tx_anyobj);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_private_ok(dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (tx->tx_anyobj || tx->tx_privateobj);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_hold_object_impl(dmu_tx_t *tx, objset_t *os, uint64_t object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens enum dmu_tx_hold_type type, dmu_tx_hold_func_t func,
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t arg1, uint64_t arg2)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_t *dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dnode_t *dn = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (object != DMU_NEW_OBJECT) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn = dnode_hold(os->os, object, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tx->tx_txg != 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_enter(&dn->dn_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * dn->dn_assigned_txg == tx->tx_txg doesn't pose a
fa9e4066f08beec538e775443c5be79dd423fcabahrens * problem, but there's no way for it to happen (for
fa9e4066f08beec538e775443c5be79dd423fcabahrens * now, at least).
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(dn->dn_assigned_txg == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(dn->dn_assigned_tx == NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_assigned_txg = tx->tx_txg;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_assigned_tx = tx;
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) refcount_add(&dn->dn_tx_holds, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_exit(&dn->dn_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth = kmem_zalloc(sizeof (dmu_tx_hold_t), KM_SLEEP);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth->dth_dnode = dn;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth->dth_type = type;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth->dth_func = func;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth->dth_arg1 = arg1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth->dth_arg2 = arg2;
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * XXX Investigate using a different data structure to keep
fa9e4066f08beec538e775443c5be79dd423fcabahrens * track of dnodes in a tx. Maybe array, since there will
fa9e4066f08beec538e775443c5be79dd423fcabahrens * generally not be many entries?
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens list_insert_tail(&tx->tx_holds, dth);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_add_new_object(dmu_tx_t *tx, objset_t *os, uint64_t object)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * If we're syncing, they can manipulate any object anyhow, and
fa9e4066f08beec538e775443c5be79dd423fcabahrens * the hold on the dnode_t can cause problems.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (!dmu_tx_is_syncing(tx)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_object_impl(tx, os, object, THT_NEWOBJECT,
fa9e4066f08beec538e775443c5be79dd423fcabahrens NULL, 0, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/* ARGSUSED */
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_count_write(dmu_tx_t *tx, dnode_t *dn, uint64_t off, uint64_t len)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t start, end, space;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int min_bs, max_bs, min_ibs, max_ibs, epbs, bits;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (len == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens min_bs = SPA_MINBLOCKSHIFT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens max_bs = SPA_MAXBLOCKSHIFT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens min_ibs = DN_MIN_INDBLKSHIFT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens max_ibs = DN_MAX_INDBLKSHIFT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * If there's more than one block, the blocksize can't change,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * so we can make a more precise estimate. Alternatively,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * if the dnode's ibs is larger than max_ibs, always use that.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * This ensures that if we reduce DN_MAX_INDBLKSHIFT,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * the code will still work correctly on existing pools.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn && (dn->dn_maxblkid != 0 || dn->dn_indblkshift > max_ibs)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens min_ibs = max_ibs = dn->dn_indblkshift;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn->dn_datablkshift != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens min_bs = max_bs = dn->dn_datablkshift;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * 'end' is the last thing we will access, not one past.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * This way we won't overflow when accessing the last byte.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens start = P2ALIGN(off, 1ULL << max_bs);
fa9e4066f08beec538e775443c5be79dd423fcabahrens end = P2ROUNDUP(off + len, 1ULL << max_bs) - 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens space = end - start + 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens start >>= min_bs;
fa9e4066f08beec538e775443c5be79dd423fcabahrens end >>= min_bs;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens epbs = min_ibs - SPA_BLKPTRSHIFT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * The object contains at most 2^(64 - min_bs) blocks,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * and each indirect level maps 2^epbs.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (bits = 64 - min_bs; bits >= 0; bits -= epbs) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens start >>= epbs;
fa9e4066f08beec538e775443c5be79dd423fcabahrens end >>= epbs;
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * If we increase the number of levels of indirection,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * we'll need new blkid=0 indirect blocks. If start == 0,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * we're already accounting for that blocks; and if end == 0,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * we can't increase the number of levels beyond that.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (start != 0 && end != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens space += 1ULL << max_ibs;
fa9e4066f08beec538e775443c5be79dd423fcabahrens space += (end - start + 1) << max_ibs;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(space < 2 * DMU_MAX_ACCESS);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_towrite += space;
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_count_dnode(dmu_tx_t *tx, dnode_t *dn)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dnode_t *mdn = tx->tx_objset->os->os_meta_dnode;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t object = dn ? dn->dn_object : DN_MAX_OBJECT - 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t pre_write_space;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(object < DN_MAX_OBJECT);
fa9e4066f08beec538e775443c5be79dd423fcabahrens pre_write_space = tx->tx_space_towrite;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_count_write(tx, mdn, object << DNODE_SHIFT, 1 << DNODE_SHIFT);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn && dn->dn_dbuf->db_blkptr &&
fa9e4066f08beec538e775443c5be79dd423fcabahrens dsl_dataset_block_freeable(dn->dn_objset->os_dsl_dataset,
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_dbuf->db_blkptr->blk_birth, tx)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_tooverwrite +=
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_towrite - pre_write_space;
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_towrite = pre_write_space;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/* ARGSUSED */
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_hold_write_impl(dmu_tx_t *tx, dnode_t *dn, uint64_t off, uint64_t len)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_count_write(tx, dn, off, len);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_count_dnode(tx, dn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_hold_write(dmu_tx_t *tx, uint64_t object, uint64_t off, int len)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(len > 0 && len < DMU_MAX_ACCESS);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(UINT64_MAX - off >= len - 1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_object_impl(tx, tx->tx_objset, object, THT_WRITE,
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_write_impl, off, len);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_count_free(dmu_tx_t *tx, dnode_t *dn, uint64_t off, uint64_t len)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t blkid, nblks;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t space = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(dn->dn_assigned_tx == tx || dn->dn_assigned_tx == NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn->dn_datablkshift == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * not that the dnode can change, since it isn't dirty, but
fa9e4066f08beec538e775443c5be79dd423fcabahrens * dbuf_hold_impl() wants us to have the struct_rwlock.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * also need it to protect dn_maxblkid.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_enter(&dn->dn_struct_rwlock, RW_READER);
fa9e4066f08beec538e775443c5be79dd423fcabahrens blkid = off >> dn->dn_datablkshift;
fa9e4066f08beec538e775443c5be79dd423fcabahrens nblks = (off + len) >> dn->dn_datablkshift;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (blkid >= dn->dn_maxblkid)
fa9e4066f08beec538e775443c5be79dd423fcabahrens goto out;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (blkid + nblks > dn->dn_maxblkid)
fa9e4066f08beec538e775443c5be79dd423fcabahrens nblks = dn->dn_maxblkid - blkid;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* don't bother after the 100,000 blocks */
fa9e4066f08beec538e775443c5be79dd423fcabahrens nblks = MIN(nblks, 128*1024);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn->dn_phys->dn_nlevels == 1) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens int i;
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < nblks; i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens blkptr_t *bp = dn->dn_phys->dn_blkptr;
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(blkid + i, <, dn->dn_phys->dn_nblkptr);
fa9e4066f08beec538e775443c5be79dd423fcabahrens bp += blkid + i;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dsl_dataset_block_freeable(ds, bp->blk_birth, tx)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf_bp(bp, "can free old%s", "");
fa9e4066f08beec538e775443c5be79dd423fcabahrens space += BP_GET_ASIZE(bp);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens goto out;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens while (nblks) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_impl_t *dbuf;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err, epbs, blkoff, tochk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens blkoff = P2PHASE(blkid, 1<<epbs);
fa9e4066f08beec538e775443c5be79dd423fcabahrens tochk = MIN((1<<epbs) - blkoff, nblks);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dbuf_hold_impl(dn, 1, blkid >> epbs, TRUE, FTAG, &dbuf);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens int i;
fa9e4066f08beec538e775443c5be79dd423fcabahrens blkptr_t *bp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dbuf_read_havestruct(dbuf);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens bp = dbuf->db.db_data;
fa9e4066f08beec538e775443c5be79dd423fcabahrens bp += blkoff;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < tochk; i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dsl_dataset_block_freeable(ds,
fa9e4066f08beec538e775443c5be79dd423fcabahrens bp[i].blk_birth, tx)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf_bp(&bp[i],
fa9e4066f08beec538e775443c5be79dd423fcabahrens "can free old%s", "");
fa9e4066f08beec538e775443c5be79dd423fcabahrens space += BP_GET_ASIZE(&bp[i]);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens dbuf_remove_ref(dbuf, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* the indirect block is sparse */
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(err == ENOENT);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens blkid += tochk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens nblks -= tochk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrensout:
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_exit(&dn->dn_struct_rwlock);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_tofree += space;
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_hold_free_impl(dmu_tx_t *tx, dnode_t *dn, uint64_t off, uint64_t len)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int dirty;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* first block */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (off != 0 /* || dn->dn_maxblkid == 0 */)
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_count_write(tx, dn, off, 1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* last block */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (len != DMU_OBJECT_END)
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_count_write(tx, dn, off+len, 1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_count_dnode(tx, dn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (off >= (dn->dn_maxblkid+1) * dn->dn_datablksz)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (len == DMU_OBJECT_END)
fa9e4066f08beec538e775443c5be79dd423fcabahrens len = (dn->dn_maxblkid+1) * dn->dn_datablksz - off;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* XXX locking */
fa9e4066f08beec538e775443c5be79dd423fcabahrens dirty = dn->dn_dirtyblksz[0] | dn->dn_dirtyblksz[1] |
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_dirtyblksz[2] | dn->dn_dirtyblksz[3];
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn->dn_assigned_tx != NULL && !dirty)
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_count_free(tx, dn, off, len);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_hold_free(dmu_tx_t *tx, uint64_t object, uint64_t off, uint64_t len)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_object_impl(tx, tx->tx_objset, object, THT_FREE,
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_free_impl, off, len);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/* ARGSUSED */
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_hold_zap_impl(dmu_tx_t *tx, dnode_t *dn, uint64_t nops, uint64_t cops)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t nblocks;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int epbs;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_count_dnode(tx, dn);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn == NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Assuming that nops+cops is not super huge, we will be
fa9e4066f08beec538e775443c5be79dd423fcabahrens * able to fit a new object's entries into one leaf
fa9e4066f08beec538e775443c5be79dd423fcabahrens * block. So there will be at most 2 blocks total,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * including the header block.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_count_write(tx, dn, 0, 2 << ZAP_BLOCK_SHIFT);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3P(dmu_ot[dn->dn_type].ot_byteswap, ==, zap_byteswap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn->dn_maxblkid == 0 && nops == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * If there is only one block (i.e. this is a micro-zap)
fa9e4066f08beec538e775443c5be79dd423fcabahrens * and we are only doing updates, the accounting is simple.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dsl_dataset_block_freeable(dn->dn_objset->os_dsl_dataset,
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_phys->dn_blkptr[0].blk_birth, tx))
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_tooverwrite += dn->dn_datablksz;
fa9e4066f08beec538e775443c5be79dd423fcabahrens else
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_towrite += dn->dn_datablksz;
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * 3 blocks overwritten per op: target leaf, ptrtbl block, header block
fa9e4066f08beec538e775443c5be79dd423fcabahrens * 3 new blocks written per op: new split leaf, 2 grown ptrtbl blocks
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_count_write(tx, dn, dn->dn_maxblkid * dn->dn_datablksz,
fa9e4066f08beec538e775443c5be79dd423fcabahrens (nops * 6ULL + cops * 3ULL) << ZAP_BLOCK_SHIFT);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * If the modified blocks are scattered to the four winds,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * we'll have to modify an indirect twig for each.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (nblocks = dn->dn_maxblkid >> epbs; nblocks != 0; nblocks >>= epbs)
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_towrite +=
fa9e4066f08beec538e775443c5be79dd423fcabahrens ((nops + cops) * 3ULL) << dn->dn_indblkshift;
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_hold_zap(dmu_tx_t *tx, uint64_t object, int ops)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_object_impl(tx, tx->tx_objset, object, THT_ZAP,
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_zap_impl, (ops > 0?ops:0), (ops < 0?-ops:0));
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_hold_bonus(dmu_tx_t *tx, uint64_t object)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_object_impl(tx, tx->tx_objset, object, THT_BONUS,
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_write_impl, 0, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/* ARGSUSED */
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_hold_space_impl(dmu_tx_t *tx, dnode_t *dn,
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t space, uint64_t unused)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_towrite += space;
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_hold_space(dmu_tx_t *tx, uint64_t space)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_object_impl(tx, tx->tx_objset, DMU_NEW_OBJECT, THT_SPACE,
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_space_impl, space, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_holds(dmu_tx_t *tx, uint64_t object)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_t *dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int holds = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * By asserting that the tx is assigned, we're counting the
fa9e4066f08beec538e775443c5be79dd423fcabahrens * number of dn_tx_holds, which is the same as the number of
fa9e4066f08beec538e775443c5be79dd423fcabahrens * dn_holds. Otherwise, we'd be counting dn_holds, but
fa9e4066f08beec538e775443c5be79dd423fcabahrens * dn_tx_holds could be 0.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* if (tx->tx_anyobj == TRUE) */
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* return (0); */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (dth = list_head(&tx->tx_holds); dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth = list_next(&tx->tx_holds, dth)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dth->dth_dnode && dth->dth_dnode->dn_object == object)
fa9e4066f08beec538e775443c5be79dd423fcabahrens holds++;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (holds);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_dirty_buf(dmu_tx_t *tx, dmu_buf_impl_t *db)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef ZFS_DEBUG
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_t *dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int match_object = FALSE, match_offset = FALSE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dnode_t *dn = db->db_dnode;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_objset == NULL || dn->dn_objset == tx->tx_objset->os);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(dn->dn_object, ==, db->db.db_object);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tx->tx_anyobj)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* XXX No checking on the meta dnode for now */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (db->db.db_object & DMU_PRIVATE_OBJECT)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (dth = list_head(&tx->tx_holds); dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth = list_next(&tx->tx_holds, dth)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(dn == NULL || dn->dn_assigned_txg == tx->tx_txg);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dth->dth_dnode == dn && dth->dth_type != THT_NEWOBJECT)
fa9e4066f08beec538e775443c5be79dd423fcabahrens match_object = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dth->dth_dnode == NULL || dth->dth_dnode == dn) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens int datablkshift = dn->dn_datablkshift ?
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_datablkshift : SPA_MAXBLOCKSHIFT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int shift = datablkshift + epbs * db->db_level;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t beginblk = shift >= 64 ? 0 :
fa9e4066f08beec538e775443c5be79dd423fcabahrens (dth->dth_arg1 >> shift);
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t endblk = shift >= 64 ? 0 :
fa9e4066f08beec538e775443c5be79dd423fcabahrens ((dth->dth_arg1 + dth->dth_arg2 - 1) >> shift);
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t blkid = db->db_blkid;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* XXX dth_arg2 better not be zero... */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("found dth type %x beginblk=%llx endblk=%llx\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth->dth_type, beginblk, endblk);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens switch (dth->dth_type) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens case THT_WRITE:
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (blkid >= beginblk && blkid <= endblk)
fa9e4066f08beec538e775443c5be79dd423fcabahrens match_offset = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * We will let this hold work for the bonus
fa9e4066f08beec538e775443c5be79dd423fcabahrens * buffer so that we don't need to hold it
fa9e4066f08beec538e775443c5be79dd423fcabahrens * when creating a new object.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (blkid == DB_BONUS_BLKID)
fa9e4066f08beec538e775443c5be79dd423fcabahrens match_offset = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * They might have to increase nlevels,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * thus dirtying the new TLIBs. Or the
fa9e4066f08beec538e775443c5be79dd423fcabahrens * might have to change the block size,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * thus dirying the new lvl=0 blk=0.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (blkid == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens match_offset = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens break;
fa9e4066f08beec538e775443c5be79dd423fcabahrens case THT_FREE:
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (blkid == beginblk &&
fa9e4066f08beec538e775443c5be79dd423fcabahrens (dth->dth_arg1 != 0 ||
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_maxblkid == 0))
fa9e4066f08beec538e775443c5be79dd423fcabahrens match_offset = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (blkid == endblk &&
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth->dth_arg2 != DMU_OBJECT_END)
fa9e4066f08beec538e775443c5be79dd423fcabahrens match_offset = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens break;
fa9e4066f08beec538e775443c5be79dd423fcabahrens case THT_BONUS:
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (blkid == DB_BONUS_BLKID)
fa9e4066f08beec538e775443c5be79dd423fcabahrens match_offset = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens break;
fa9e4066f08beec538e775443c5be79dd423fcabahrens case THT_ZAP:
fa9e4066f08beec538e775443c5be79dd423fcabahrens match_offset = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens break;
fa9e4066f08beec538e775443c5be79dd423fcabahrens case THT_NEWOBJECT:
fa9e4066f08beec538e775443c5be79dd423fcabahrens match_object = TRUE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens break;
fa9e4066f08beec538e775443c5be79dd423fcabahrens default:
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(!"bad dth_type");
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (match_object && match_offset)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens panic("dirtying dbuf obj=%llx lvl=%u blkid=%llx but not tx_held\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens (u_longlong_t)db->db.db_object, db->db_level,
fa9e4066f08beec538e775443c5be79dd423fcabahrens (u_longlong_t)db->db_blkid);
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_try_assign(dmu_tx_t *tx, uint64_t txg_how, dmu_tx_hold_t **last_dth)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_t *dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t lsize, asize, fsize;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens *last_dth = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_towrite = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_tofree = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_tooverwrite = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_txg = txg_hold_open(tx->tx_pool, &tx->tx_txgh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (txg_how >= TXG_INITIAL && txg_how != tx->tx_txg)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (ERESTART);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (dth = list_head(&tx->tx_holds); dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens *last_dth = dth, dth = list_next(&tx->tx_holds, dth)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dnode_t *dn = dth->dth_dnode;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn != NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_enter(&dn->dn_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens while (dn->dn_assigned_txg == tx->tx_txg - 1) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (txg_how != TXG_WAIT) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_exit(&dn->dn_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (ERESTART);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens cv_wait(&dn->dn_notxholds, &dn->dn_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn->dn_assigned_txg == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(dn->dn_assigned_tx == NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_assigned_txg = tx->tx_txg;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_assigned_tx = tx;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(dn->dn_assigned_txg == tx->tx_txg);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn->dn_assigned_tx != tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_assigned_tx = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) refcount_add(&dn->dn_tx_holds, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_exit(&dn->dn_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dth->dth_func)
fa9e4066f08beec538e775443c5be79dd423fcabahrens dth->dth_func(tx, dn, dth->dth_arg1, dth->dth_arg2);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Convert logical size to worst-case allocated size.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens fsize = spa_get_asize(tx->tx_pool->dp_spa, tx->tx_space_tooverwrite) +
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_tofree;
fa9e4066f08beec538e775443c5be79dd423fcabahrens lsize = tx->tx_space_towrite + tx->tx_space_tooverwrite;
fa9e4066f08beec538e775443c5be79dd423fcabahrens asize = spa_get_asize(tx->tx_pool->dp_spa, lsize);
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_towrite = asize;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tx->tx_dir && asize != 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err = dsl_dir_tempreserve_space(tx->tx_dir,
fa9e4066f08beec538e775443c5be79dd423fcabahrens lsize, asize, fsize, &tx->tx_tempreserve_cookie, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic uint64_t
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_unassign(dmu_tx_t *tx, dmu_tx_hold_t *last_dth)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t txg = tx->tx_txg;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_t *dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(txg != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens txg_rele_to_quiesce(&tx->tx_txgh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (dth = last_dth; dth; dth = list_prev(&tx->tx_holds, dth)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dnode_t *dn = dth->dth_dnode;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn == NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens continue;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_enter(&dn->dn_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(dn->dn_assigned_txg, ==, txg);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (refcount_remove(&dn->dn_tx_holds, tx) == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_assigned_txg = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_assigned_tx = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens cv_broadcast(&dn->dn_notxholds);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_exit(&dn->dn_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens txg_rele_to_sync(&tx->tx_txgh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_txg = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (txg);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Assign tx to a transaction group. txg_how can be one of:
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * (1) TXG_WAIT. If the current open txg is full, waits until there's
fa9e4066f08beec538e775443c5be79dd423fcabahrens * a new one. This should be used when you're not holding locks.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * If will only fail if we're truly out of space (or over quota).
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * (2) TXG_NOWAIT. If we can't assign into the current open txg without
fa9e4066f08beec538e775443c5be79dd423fcabahrens * blocking, returns immediately with ERESTART. This should be used
fa9e4066f08beec538e775443c5be79dd423fcabahrens * whenever you're holding locks. On an ERESTART error, the caller
fa9e4066f08beec538e775443c5be79dd423fcabahrens * should drop locks, do a txg_wait_open(dp, 0), and try again.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * (3) A specific txg. Use this if you need to ensure that multiple
fa9e4066f08beec538e775443c5be79dd423fcabahrens * transactions all sync in the same txg. Like TXG_NOWAIT, it
fa9e4066f08beec538e775443c5be79dd423fcabahrens * returns ERESTART if it can't assign you into the requested txg.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_assign(dmu_tx_t *tx, uint64_t txg_how)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_t *last_dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(txg_how != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(!dsl_pool_sync_context(tx->tx_pool));
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(tx->tx_space_towrite, ==, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(tx->tx_space_tofree, ==, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens while ((err = dmu_tx_try_assign(tx, txg_how, &last_dth)) != 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t txg = dmu_tx_unassign(tx, last_dth);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != ERESTART || txg_how != TXG_WAIT)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens txg_wait_open(tx->tx_pool, txg + 1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens txg_rele_to_quiesce(&tx->tx_txgh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_willuse_space(dmu_tx_t *tx, int64_t delta)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tx->tx_dir == NULL || delta == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (delta > 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(refcount_count(&tx->tx_space_written) + delta, <=,
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_towrite);
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) refcount_add_many(&tx->tx_space_written, delta, NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) refcount_add_many(&tx->tx_space_freed, -delta, NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_commit(dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_t *dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens while (dth = list_head(&tx->tx_holds)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dnode_t *dn = dth->dth_dnode;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens list_remove(&tx->tx_holds, dth);
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(dth, sizeof (dmu_tx_hold_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn == NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens continue;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_enter(&dn->dn_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(dn->dn_assigned_txg, ==, tx->tx_txg);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (refcount_remove(&dn->dn_tx_holds, tx) == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_assigned_txg = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dn->dn_assigned_tx = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens cv_broadcast(&dn->dn_notxholds);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_exit(&dn->dn_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dnode_rele(dn, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tx->tx_dir && tx->tx_space_towrite > 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dsl_dir_tempreserve_clear(tx->tx_tempreserve_cookie, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tx->tx_anyobj == FALSE)
fa9e4066f08beec538e775443c5be79dd423fcabahrens txg_rele_to_sync(&tx->tx_txgh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("towrite=%llu written=%llu tofree=%llu freed=%llu\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_towrite, refcount_count(&tx->tx_space_written),
fa9e4066f08beec538e775443c5be79dd423fcabahrens tx->tx_space_tofree, refcount_count(&tx->tx_space_freed));
fa9e4066f08beec538e775443c5be79dd423fcabahrens refcount_destroy_many(&tx->tx_space_written,
fa9e4066f08beec538e775443c5be79dd423fcabahrens refcount_count(&tx->tx_space_written));
fa9e4066f08beec538e775443c5be79dd423fcabahrens refcount_destroy_many(&tx->tx_space_freed,
fa9e4066f08beec538e775443c5be79dd423fcabahrens refcount_count(&tx->tx_space_freed));
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef ZFS_DEBUG
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tx->tx_debug_buf)
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(tx->tx_debug_buf, 4096);
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(tx, sizeof (dmu_tx_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_abort(dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_hold_t *dth;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens while (dth = list_head(&tx->tx_holds)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dnode_t *dn = dth->dth_dnode;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens list_remove(&tx->tx_holds, dth);
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(dth, sizeof (dmu_tx_hold_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (dn != NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens dnode_rele(dn, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens refcount_destroy_many(&tx->tx_space_written,
fa9e4066f08beec538e775443c5be79dd423fcabahrens refcount_count(&tx->tx_space_written));
fa9e4066f08beec538e775443c5be79dd423fcabahrens refcount_destroy_many(&tx->tx_space_freed,
fa9e4066f08beec538e775443c5be79dd423fcabahrens refcount_count(&tx->tx_space_freed));
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef ZFS_DEBUG
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tx->tx_debug_buf)
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(tx->tx_debug_buf, 4096);
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(tx, sizeof (dmu_tx_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensuint64_t
fa9e4066f08beec538e775443c5be79dd423fcabahrensdmu_tx_get_txg(dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx->tx_txg != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (tx->tx_txg);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}