dnode_sync.c revision 0f6d88aded0d165f5954688a9b13bac76c38da84
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee/*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * CDDL HEADER START
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee *
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23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Common Development and Distribution License (the "License").
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * You may not use this file except in compliance with the License.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee *
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * or http://www.opensolaris.org/os/licensing.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * See the License for the specific language governing permissions
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23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * When distributing Covered Code, include this CDDL HEADER in each
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee/*
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#include <sys/zfs_context.h>
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#include <sys/dbuf.h>
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#include <sys/dnode.h>
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#include <sys/dmu.h>
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#include <sys/dmu_tx.h>
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#include <sys/dmu_objset.h>
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#include <sys/dsl_dataset.h>
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#include <sys/spa.h>
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#include <sys/range_tree.h>
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#include <sys/zfeature.h>
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeestatic void
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeednode_increase_indirection(dnode_t *dn, dmu_tx_t *tx)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee{
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_buf_impl_t *db;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int txgoff = tx->tx_txg & TXG_MASK;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int nblkptr = dn->dn_phys->dn_nblkptr;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int old_toplvl = dn->dn_phys->dn_nlevels - 1;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int new_level = dn->dn_next_nlevels[txgoff];
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int i;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* this dnode can't be paged out because it's dirty */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dn->dn_phys->dn_type != DMU_OT_NONE);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(RW_WRITE_HELD(&dn->dn_struct_rwlock));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(new_level > 1 && dn->dn_phys->dn_nlevels > 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee db = dbuf_hold_level(dn, dn->dn_phys->dn_nlevels, 0, FTAG);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(db != NULL);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_phys->dn_nlevels = new_level;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dprintf("os=%p obj=%llu, increase to %d\n", dn->dn_objset,
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_object, dn->dn_phys->dn_nlevels);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* check for existing blkptrs in the dnode */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee for (i = 0; i < nblkptr; i++)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (!BP_IS_HOLE(&dn->dn_phys->dn_blkptr[i]))
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee break;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (i != nblkptr) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* transfer dnode's block pointers to new indirect block */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee (void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED|DB_RF_HAVESTRUCT);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(db->db.db_data);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(arc_released(db->db_buf));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3U(sizeof (blkptr_t) * nblkptr, <=, db->db.db_size);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee bcopy(dn->dn_phys->dn_blkptr, db->db.db_data,
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee sizeof (blkptr_t) * nblkptr);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee arc_buf_freeze(db->db_buf);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee }
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee /* set dbuf's parent pointers to new indirect buf */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee for (i = 0; i < nblkptr; i++) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_buf_impl_t *child = dbuf_find(dn, old_toplvl, i);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee if (child == NULL)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee continue;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#ifdef DEBUG
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee DB_DNODE_ENTER(child);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3P(DB_DNODE(child), ==, dn);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee DB_DNODE_EXIT(child);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#endif /* DEBUG */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (child->db_parent && child->db_parent != dn->dn_dbuf) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(child->db_parent->db_level == db->db_level);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(child->db_blkptr !=
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee &dn->dn_phys->dn_blkptr[child->db_blkid]);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&child->db_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee continue;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(child->db_parent == NULL ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee child->db_parent == dn->dn_dbuf);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee child->db_parent = db;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_add_ref(db, child);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (db->db.db_data)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee child->db_blkptr = (blkptr_t *)db->db.db_data + i;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee else
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee child->db_blkptr = NULL;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dprintf_dbuf_bp(child, child->db_blkptr,
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee "changed db_blkptr to new indirect %s", "");
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&child->db_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee bzero(dn->dn_phys->dn_blkptr, sizeof (blkptr_t) * nblkptr);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_rele(db, FTAG);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee rw_exit(&dn->dn_struct_rwlock);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee}
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeestatic void
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeefree_blocks(dnode_t *dn, blkptr_t *bp, int num, dmu_tx_t *tx)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee{
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee uint64_t bytesfreed = 0;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dprintf("ds=%p obj=%llx num=%d\n", ds, dn->dn_object, num);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee for (int i = 0; i < num; i++, bp++) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (BP_IS_HOLE(bp))
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee continue;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee bytesfreed += dsl_dataset_block_kill(ds, bp, tx, B_FALSE);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3U(bytesfreed, <=, DN_USED_BYTES(dn->dn_phys));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Save some useful information on the holes being
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * punched, including logical size, type, and indirection
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * level. Retaining birth time enables detection of when
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * holes are punched for reducing the number of free
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * records transmitted during a zfs send.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee uint64_t lsize = BP_GET_LSIZE(bp);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_object_type_t type = BP_GET_TYPE(bp);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee uint64_t lvl = BP_GET_LEVEL(bp);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee bzero(bp, sizeof (blkptr_t));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (spa_feature_is_active(dn->dn_objset->os_spa,
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee SPA_FEATURE_HOLE_BIRTH)) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee BP_SET_LSIZE(bp, lsize);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee BP_SET_TYPE(bp, type);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee BP_SET_LEVEL(bp, lvl);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee BP_SET_BIRTH(bp, dmu_tx_get_txg(tx), 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_diduse_space(dn, -bytesfreed);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee}
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#ifdef ZFS_DEBUG
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeestatic void
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeefree_verify(dmu_buf_impl_t *db, uint64_t start, uint64_t end, dmu_tx_t *tx)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee{
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int off, num;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int i, err, epbs;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee uint64_t txg = tx->tx_txg;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_t *dn;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee DB_DNODE_ENTER(db);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn = DB_DNODE(db);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee off = start - (db->db_blkid * 1<<epbs);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee num = end - start + 1;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3U(off, >=, 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3U(num, >=, 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3U(db->db_level, >, 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3U(db->db.db_size, ==, 1 << dn->dn_phys->dn_indblkshift);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3U(off+num, <=, db->db.db_size >> SPA_BLKPTRSHIFT);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(db->db_blkptr != NULL);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee for (i = off; i < off+num; i++) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee uint64_t *buf;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_buf_impl_t *child;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_dirty_record_t *dr;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int j;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(db->db_level == 1);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee rw_enter(&dn->dn_struct_rwlock, RW_READER);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee err = dbuf_hold_impl(dn, db->db_level-1,
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee (db->db_blkid << epbs) + i, TRUE, FTAG, &child);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee rw_exit(&dn->dn_struct_rwlock);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (err == ENOENT)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee continue;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(err == 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(child->db_level == 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dr = child->db_last_dirty;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee while (dr && dr->dr_txg > txg)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dr = dr->dr_next;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dr == NULL || dr->dr_txg == txg);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* data_old better be zeroed */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dr) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee buf = dr->dt.dl.dr_data->b_data;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee for (j = 0; j < child->db.db_size >> 3; j++) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (buf[j] != 0) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee panic("freed data not zero: "
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee "child=%p i=%d off=%d num=%d\n",
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee (void *)child, i, off, num);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * db_data better be zeroed unless it's dirty in a
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * future txg.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_enter(&child->db_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee buf = child->db.db_data;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (buf != NULL && child->db_state != DB_FILL &&
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee child->db_last_dirty == NULL) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee for (j = 0; j < child->db.db_size >> 3; j++) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (buf[j] != 0) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee panic("freed data not zero: "
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee "child=%p i=%d off=%d num=%d\n",
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee (void *)child, i, off, num);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&child->db_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_rele(child, FTAG);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee DB_DNODE_EXIT(db);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee}
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#endif
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeestatic void
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeefree_children(dmu_buf_impl_t *db, uint64_t blkid, uint64_t nblks,
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_tx_t *tx)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee{
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_t *dn;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee blkptr_t *bp;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_buf_impl_t *subdb;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee uint64_t start, end, dbstart, dbend, i;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int epbs, shift;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * There is a small possibility that this block will not be cached:
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * 1 - if level > 1 and there are no children with level <= 1
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * 2 - if this block was evicted since we read it from
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * dmu_tx_hold_free().
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (db->db_state != DB_CACHED)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee (void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_release_bp(db);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee bp = db->db.db_data;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee DB_DNODE_ENTER(db);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn = DB_DNODE(db);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee epbs = dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee shift = (db->db_level - 1) * epbs;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbstart = db->db_blkid << epbs;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee start = blkid >> shift;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dbstart < start) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee bp += start - dbstart;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee } else {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee start = dbstart;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbend = ((db->db_blkid + 1) << epbs) - 1;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee end = (blkid + nblks - 1) >> shift;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dbend <= end)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee end = dbend;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3U(start, <=, end);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (db->db_level == 1) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee FREE_VERIFY(db, start, end, tx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee free_blocks(dn, bp, end-start+1, tx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee } else {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee for (i = start; i <= end; i++, bp++) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (BP_IS_HOLE(bp))
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee continue;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee rw_enter(&dn->dn_struct_rwlock, RW_READER);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee VERIFY0(dbuf_hold_impl(dn, db->db_level - 1,
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee i, B_TRUE, FTAG, &subdb));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee rw_exit(&dn->dn_struct_rwlock);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3P(bp, ==, subdb->db_blkptr);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee free_children(subdb, blkid, nblks, tx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_rele(subdb, FTAG);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* If this whole block is free, free ourself too. */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee for (i = 0, bp = db->db.db_data; i < 1 << epbs; i++, bp++) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (!BP_IS_HOLE(bp))
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee break;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (i == 1 << epbs) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* didn't find any non-holes */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee bzero(db->db.db_data, db->db.db_size);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee free_blocks(dn, db->db_blkptr, 1, tx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee } else {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Partial block free; must be marked dirty so that it
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * will be written out.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(db->db_dirtycnt > 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee DB_DNODE_EXIT(db);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee arc_buf_freeze(db->db_buf);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee}
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee/*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Traverse the indicated range of the provided file
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * and "free" all the blocks contained there.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeestatic void
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeednode_sync_free_range_impl(dnode_t *dn, uint64_t blkid, uint64_t nblks,
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_tx_t *tx)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee{
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee blkptr_t *bp = dn->dn_phys->dn_blkptr;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int dnlevel = dn->dn_phys->dn_nlevels;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee boolean_t trunc = B_FALSE;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (blkid > dn->dn_phys->dn_maxblkid)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee return;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dn->dn_phys->dn_maxblkid < UINT64_MAX);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (blkid + nblks > dn->dn_phys->dn_maxblkid) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee nblks = dn->dn_phys->dn_maxblkid - blkid + 1;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee trunc = B_TRUE;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* There are no indirect blocks in the object */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dnlevel == 1) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (blkid >= dn->dn_phys->dn_nblkptr) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* this range was never made persistent */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee return;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3U(blkid + nblks, <=, dn->dn_phys->dn_nblkptr);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee free_blocks(dn, bp + blkid, nblks, tx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee } else {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int shift = (dnlevel - 1) *
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee (dn->dn_phys->dn_indblkshift - SPA_BLKPTRSHIFT);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int start = blkid >> shift;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int end = (blkid + nblks - 1) >> shift;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_buf_impl_t *db;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(start < dn->dn_phys->dn_nblkptr);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee bp += start;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee for (int i = start; i <= end; i++, bp++) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (BP_IS_HOLE(bp))
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee continue;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee rw_enter(&dn->dn_struct_rwlock, RW_READER);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee VERIFY0(dbuf_hold_impl(dn, dnlevel - 1, i,
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee TRUE, FTAG, &db));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee rw_exit(&dn->dn_struct_rwlock);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee free_children(db, blkid, nblks, tx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_rele(db, FTAG);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (trunc) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_phys->dn_maxblkid = blkid == 0 ? 0 : blkid - 1;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee uint64_t off = (dn->dn_phys->dn_maxblkid + 1) *
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee (dn->dn_phys->dn_datablkszsec << SPA_MINBLOCKSHIFT);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(off < dn->dn_phys->dn_maxblkid ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_phys->dn_maxblkid == 0 ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_next_offset(dn, 0, &off, 1, 1, 0) != 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee}
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeetypedef struct dnode_sync_free_range_arg {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_t *dsfra_dnode;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_tx_t *dsfra_tx;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee} dnode_sync_free_range_arg_t;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeestatic void
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeednode_sync_free_range(void *arg, uint64_t blkid, uint64_t nblks)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee{
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_sync_free_range_arg_t *dsfra = arg;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_t *dn = dsfra->dsfra_dnode;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_sync_free_range_impl(dn, blkid, nblks, dsfra->dsfra_tx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_enter(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee}
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee/*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Try to kick all the dnode's dbufs out of the cache...
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeevoid
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeednode_evict_dbufs(dnode_t *dn)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee{
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int progress;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int pass = 0;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee do {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_buf_impl_t *db, *db_next;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int evicting = FALSE;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee progress = FALSE;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_enter(&dn->dn_dbufs_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee for (db = avl_first(&dn->dn_dbufs); db != NULL; db = db_next) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee db_next = AVL_NEXT(&dn->dn_dbufs, db);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#ifdef DEBUG
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee DB_DNODE_ENTER(db);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT3P(DB_DNODE(db), ==, dn);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee DB_DNODE_EXIT(db);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee#endif /* DEBUG */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_enter(&db->db_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (db->db_state == DB_EVICTING) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee progress = TRUE;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee evicting = TRUE;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&db->db_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee } else if (refcount_is_zero(&db->db_holds)) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee progress = TRUE;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_clear(db); /* exits db_mtx for us */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee } else {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&db->db_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * NB: we need to drop dn_dbufs_mtx between passes so
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * that any DB_EVICTING dbufs can make progress.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Ideally, we would have some cv we could wait on, but
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * since we don't, just wait a bit to give the other
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * thread a chance to run.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&dn->dn_dbufs_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (evicting)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee delay(1);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee pass++;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(pass < 100); /* sanity check */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee } while (progress);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_bonus && refcount_is_zero(&dn->dn_bonus->db_holds)) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_enter(&dn->dn_bonus->db_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_evict(dn->dn_bonus);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_bonus = NULL;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee rw_exit(&dn->dn_struct_rwlock);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee}
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeestatic void
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeednode_undirty_dbufs(list_t *list)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee{
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_dirty_record_t *dr;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee while (dr = list_head(list)) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_buf_impl_t *db = dr->dr_dbuf;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee uint64_t txg = dr->dr_txg;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (db->db_level != 0)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_undirty_dbufs(&dr->dt.di.dr_children);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_enter(&db->db_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* XXX - use dbuf_undirty()? */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee list_remove(list, dr);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(db->db_last_dirty == dr);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee db->db_last_dirty = NULL;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee db->db_dirtycnt -= 1;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (db->db_level == 0) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(db->db_blkid == DMU_BONUS_BLKID ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dr->dt.dl.dr_data == db->db_buf);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_unoverride(dr);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee } else {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_destroy(&dr->dt.di.dr_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee list_destroy(&dr->dt.di.dr_children);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee kmem_free(dr, sizeof (dbuf_dirty_record_t));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dbuf_rele_and_unlock(db, (void *)(uintptr_t)txg);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee}
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeestatic void
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeednode_sync_free(dnode_t *dn, dmu_tx_t *tx)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee{
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int txgoff = tx->tx_txg & TXG_MASK;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dmu_tx_is_syncing(tx));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Our contents should have been freed in dnode_sync() by the
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee * free range record inserted by the caller of dnode_free().
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee */
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee ASSERT0(DN_USED_BYTES(dn->dn_phys));
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee ASSERT(BP_IS_HOLE(dn->dn_phys->dn_blkptr));
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee dnode_undirty_dbufs(&dn->dn_dirty_records[txgoff]);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee dnode_evict_dbufs(dn);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee ASSERT(avl_is_empty(&dn->dn_dbufs));
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee ASSERT3P(dn->dn_bonus, ==, NULL);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee /*
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee * XXX - It would be nice to assert this, but we may still
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee * have residual holds from async evictions from the arc...
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee *
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee * zfs_obj_to_path() also depends on this being
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee * commented out.
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee *
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee * ASSERT3U(refcount_count(&dn->dn_holds), ==, 1);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee */
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee /* Undirty next bits */
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee dn->dn_next_nlevels[txgoff] = 0;
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee dn->dn_next_indblkshift[txgoff] = 0;
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee dn->dn_next_blksz[txgoff] = 0;
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee /* ASSERT(blkptrs are zero); */
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee ASSERT(dn->dn_phys->dn_type != DMU_OT_NONE);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee ASSERT(dn->dn_type != DMU_OT_NONE);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee ASSERT(dn->dn_free_txg > 0);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee if (dn->dn_allocated_txg != dn->dn_free_txg)
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee dmu_buf_will_dirty(&dn->dn_dbuf->db, tx);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee bzero(dn->dn_phys, sizeof (dnode_phys_t));
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee mutex_enter(&dn->dn_mtx);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee dn->dn_type = DMU_OT_NONE;
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee dn->dn_maxblkid = 0;
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee dn->dn_allocated_txg = 0;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_free_txg = 0;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_have_spill = B_FALSE;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_rele(dn, (void *)(uintptr_t)tx->tx_txg);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Now that we've released our hold, the dnode may
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * be evicted, so we musn't access it.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee}
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee/*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Write out the dnode's dirty buffers.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeevoid
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomeednode_sync(dnode_t *dn, dmu_tx_t *tx)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee{
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_phys_t *dnp = dn->dn_phys;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee int txgoff = tx->tx_txg & TXG_MASK;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee list_t *list = &dn->dn_dirty_records[txgoff];
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee static const dnode_phys_t zerodn = { 0 };
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee boolean_t kill_spill = B_FALSE;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dmu_tx_is_syncing(tx));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dnp->dn_type != DMU_OT_NONE || dn->dn_allocated_txg);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dnp->dn_type != DMU_OT_NONE ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee bcmp(dnp, &zerodn, DNODE_SIZE) == 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee DNODE_VERIFY(dn);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dn->dn_dbuf == NULL || arc_released(dn->dn_dbuf->db_buf));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dmu_objset_userused_enabled(dn->dn_objset) &&
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee !DMU_OBJECT_IS_SPECIAL(dn->dn_object)) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_enter(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_oldused = DN_USED_BYTES(dn->dn_phys);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_oldflags = dn->dn_phys->dn_flags;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_phys->dn_flags |= DNODE_FLAG_USERUSED_ACCOUNTED;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dmu_objset_userquota_get_ids(dn, B_FALSE, tx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee } else {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* Once we account for it, we should always account for it. */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(!(dn->dn_phys->dn_flags &
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee DNODE_FLAG_USERUSED_ACCOUNTED));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_enter(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_allocated_txg == tx->tx_txg) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* The dnode is newly allocated or reallocated */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dnp->dn_type == DMU_OT_NONE) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* this is a first alloc, not a realloc */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_nlevels = 1;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_nblkptr = dn->dn_nblkptr;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_type = dn->dn_type;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_bonustype = dn->dn_bonustype;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_bonuslen = dn->dn_bonuslen;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dnp->dn_nlevels > 1 ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee BP_IS_HOLE(&dnp->dn_blkptr[0]) ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee BP_IS_EMBEDDED(&dnp->dn_blkptr[0]) ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee BP_GET_LSIZE(&dnp->dn_blkptr[0]) ==
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dnp->dn_nlevels < 2 ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee BP_IS_HOLE(&dnp->dn_blkptr[0]) ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee BP_GET_LSIZE(&dnp->dn_blkptr[0]) == 1 << dnp->dn_indblkshift);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_next_type[txgoff] != 0) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_type = dn->dn_type;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_next_type[txgoff] = 0;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_next_blksz[txgoff] != 0) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(P2PHASE(dn->dn_next_blksz[txgoff],
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee SPA_MINBLOCKSIZE) == 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[0]) ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_maxblkid == 0 || list_head(list) != NULL ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_next_blksz[txgoff] >> SPA_MINBLOCKSHIFT ==
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_datablkszsec ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee range_tree_space(dn->dn_free_ranges[txgoff]) != 0);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_datablkszsec =
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_next_blksz[txgoff] >> SPA_MINBLOCKSHIFT;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_next_blksz[txgoff] = 0;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_next_bonuslen[txgoff] != 0) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_next_bonuslen[txgoff] == DN_ZERO_BONUSLEN)
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_bonuslen = 0;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee else
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_bonuslen = dn->dn_next_bonuslen[txgoff];
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dnp->dn_bonuslen <= DN_MAX_BONUSLEN);
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee dn->dn_next_bonuslen[txgoff] = 0;
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee }
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee if (dn->dn_next_bonustype[txgoff] != 0) {
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee ASSERT(DMU_OT_IS_VALID(dn->dn_next_bonustype[txgoff]));
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_bonustype = dn->dn_next_bonustype[txgoff];
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_next_bonustype[txgoff] = 0;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee boolean_t freeing_dnode = dn->dn_free_txg > 0 &&
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_free_txg <= tx->tx_txg;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * We will either remove a spill block when a file is being removed
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * or we have been asked to remove it.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_rm_spillblk[txgoff] ||
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ((dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) && freeing_dnode)) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if ((dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR))
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee kill_spill = B_TRUE;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_rm_spillblk[txgoff] = 0;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_next_indblkshift[txgoff] != 0) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dnp->dn_nlevels == 1);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_indblkshift = dn->dn_next_indblkshift[txgoff];
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_next_indblkshift[txgoff] = 0;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /*
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Just take the live (open-context) values for checksum and compress.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * Strictly speaking it's a future leak, but nothing bad happens if we
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee * start using the new checksum or compress algorithm a little early.
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_checksum = dn->dn_checksum;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_compress = dn->dn_compress;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
91cfa10a8e55050a5103c4b2e83b0bf8d783a7cbtomee if (kill_spill) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee free_blocks(dn, &dn->dn_phys->dn_spill, 1, tx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_enter(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnp->dn_flags &= ~DNODE_FLAG_SPILL_BLKPTR;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* process all the "freed" ranges in the file */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_free_ranges[txgoff] != NULL) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_sync_free_range_arg_t dsfra;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dsfra.dsfra_dnode = dn;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dsfra.dsfra_tx = tx;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_enter(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee range_tree_vacate(dn->dn_free_ranges[txgoff],
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_sync_free_range, &dsfra);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee range_tree_destroy(dn->dn_free_ranges[txgoff]);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dn->dn_free_ranges[txgoff] = NULL;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee mutex_exit(&dn->dn_mtx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (freeing_dnode) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee dnode_sync_free(dn, tx);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee return;
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee }
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_next_nblkptr[txgoff]) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* this should only happen on a realloc */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee ASSERT(dn->dn_allocated_txg == tx->tx_txg);
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee if (dn->dn_next_nblkptr[txgoff] > dnp->dn_nblkptr) {
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee /* zero the new blkptrs we are gaining */
23b5c241225a8ade2b6b9f06ebb891ee459e3b02tomee bzero(dnp->dn_blkptr + dnp->dn_nblkptr,
sizeof (blkptr_t) *
(dn->dn_next_nblkptr[txgoff] - dnp->dn_nblkptr));
#ifdef ZFS_DEBUG
} else {
int i;
ASSERT(dn->dn_next_nblkptr[txgoff] < dnp->dn_nblkptr);
/* the blkptrs we are losing better be unallocated */
for (i = dn->dn_next_nblkptr[txgoff];
i < dnp->dn_nblkptr; i++)
ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[i]));
#endif
}
mutex_enter(&dn->dn_mtx);
dnp->dn_nblkptr = dn->dn_next_nblkptr[txgoff];
dn->dn_next_nblkptr[txgoff] = 0;
mutex_exit(&dn->dn_mtx);
}
if (dn->dn_next_nlevels[txgoff]) {
dnode_increase_indirection(dn, tx);
dn->dn_next_nlevels[txgoff] = 0;
}
dbuf_sync_list(list, tx);
if (!DMU_OBJECT_IS_SPECIAL(dn->dn_object)) {
ASSERT3P(list_head(list), ==, NULL);
dnode_rele(dn, (void *)(uintptr_t)tx->tx_txg);
}
/*
* Although we have dropped our reference to the dnode, it
* can't be evicted until its written, and we haven't yet
* initiated the IO for the dnode's dbuf.
*/
}