zap.c revision 8248818d5849649ef734d62da097e90222a23763
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 (the "License").
fa9e4066f08beec538e775443c5be79dd423fcabahrens * You may not use this file except in compliance 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
fa9e4066f08beec538e775443c5be79dd423fcabahrens * and limitations under the License.
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
fa9e4066f08beec538e775443c5be79dd423fcabahrens * fields enclosed by brackets "[]" replaced with your own identifying
fa9e4066f08beec538e775443c5be79dd423fcabahrens * information: Portions Copyright [yyyy] [name of copyright owner]
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER END
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Copyright 2006 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
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * This file contains the top half of the zfs directory structure
fa9e4066f08beec538e775443c5be79dd423fcabahrens * implementation. The bottom half is in zap_leaf.c.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * The zdir is an extendable hash data structure. There is a table of
fa9e4066f08beec538e775443c5be79dd423fcabahrens * pointers to buckets (zap_t->zd_data->zd_leafs). The buckets are
fa9e4066f08beec538e775443c5be79dd423fcabahrens * each a constant size and hold a variable number of directory entries.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * The buckets (aka "leaf nodes") are implemented in zap_leaf.c.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * The pointer table holds a power of 2 number of pointers.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * (1<<zap_t->zd_data->zd_phys->zd_prefix_len). The bucket pointed to
fa9e4066f08beec538e775443c5be79dd423fcabahrens * by the pointer at index i in the table holds entries whose hash value
fa9e4066f08beec538e775443c5be79dd423fcabahrens * has a zd_prefix_len - bit prefix
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/spa.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/dmu.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zfs_context.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zap.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/refcount.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zap_impl.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zap_leaf.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint fzap_default_block_shift = 14; /* 16k blocksize */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void zap_leaf_pageout(dmu_buf_t *db, void *vl);
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic uint64_t zap_allocate_blocks(zap_t *zap, int nblocks);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_byteswap(void *vbuf, size_t size)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t block_type;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens block_type = *(uint64_t *)vbuf;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens switch (block_type) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens case ZBT_LEAF:
fa9e4066f08beec538e775443c5be79dd423fcabahrens case BSWAP_64(ZBT_LEAF):
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_byteswap(vbuf, size);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens case ZBT_HEADER:
fa9e4066f08beec538e775443c5be79dd423fcabahrens case BSWAP_64(ZBT_HEADER):
fa9e4066f08beec538e775443c5be79dd423fcabahrens default:
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* it's a ptrtbl block */
fa9e4066f08beec538e775443c5be79dd423fcabahrens byteswap_uint64_array(vbuf, size);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_upgrade(zap_t *zap, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_t *db;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int i;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_phys_t *zp;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_ismicro = FALSE;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) dmu_buf_update_user(zap->zap_dbuf, zap, zap,
fa9e4066f08beec538e775443c5be79dd423fcabahrens &zap->zap_f.zap_phys, zap_pageout);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_f.zap_block_shift = highbit(zap->zap_dbuf->db_size) - 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp = zap->zap_f.zap_phys;
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * explicitly zero it since it might be coming from an
fa9e4066f08beec538e775443c5be79dd423fcabahrens * initialized microzap
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens bzero(zap->zap_dbuf->db_data, zap->zap_dbuf->db_size);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp->zap_block_type = ZBT_HEADER;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp->zap_magic = ZAP_MAGIC;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp->zap_ptrtbl.zt_shift = ZAP_EMBEDDED_PTRTBL_SHIFT(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp->zap_freeblk = 2; /* block 1 will be the first leaf */
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp->zap_num_leafs = 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp->zap_num_entries = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zp->zap_salt = zap->zap_salt;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* block 1 will be the first leaf */
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++)
fa9e4066f08beec538e775443c5be79dd423fcabahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * set up block 1 - the first leaf
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db));
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(db, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP);
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_dbuf = db;
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_phys = db->db_data;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_init(l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(l, sizeof (zap_leaf_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(db, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_tryupgradedir(zap_t *zap, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (RW_WRITE_HELD(&zap->zap_rwlock))
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (rw_tryupgrade(&zap->zap_rwlock)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(zap->zap_dbuf, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Generic routines for dealing with the pointer & cookie tables.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_table_grow(zap_t *zap, zap_table_phys_t *tbl,
fa9e4066f08beec538e775443c5be79dd423fcabahrens void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n),
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t b, newblk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_t *db_old, *db_new;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int bs = FZAP_BLOCK_SHIFT(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens int hepb = 1<<(bs-4);
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* hepb = half the number of entries in a block */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tbl->zt_blk != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tbl->zt_numblks > 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tbl->zt_nextblk != 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens newblk = tbl->zt_nextblk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2);
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_nextblk = newblk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(tbl->zt_blks_copied, ==, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_prefetch(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_blk << bs, tbl->zt_numblks << bs);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Copy the ptrtbl from the old to new location.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens b = tbl->zt_blks_copied;
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens (tbl->zt_blk + b) << bs, FTAG, &db_old);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* first half of entries in old[b] go to new[2*b+0] */
fa9e4066f08beec538e775443c5be79dd423fcabahrens VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens (newblk + 2*b+0) << bs, FTAG, &db_new));
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(db_new, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens transfer_func(db_old->db_data, db_new->db_data, hepb);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(db_new, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* second half of entries in old[b] go to new[2*b+1] */
fa9e4066f08beec538e775443c5be79dd423fcabahrens VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens (newblk + 2*b+1) << bs, FTAG, &db_new));
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(db_new, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens transfer_func((uint64_t *)db_old->db_data + hepb,
fa9e4066f08beec538e775443c5be79dd423fcabahrens db_new->db_data, hepb);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(db_new, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(db_old, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_blks_copied++;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("copied block %llu of %llu\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_blks_copied, tbl->zt_numblks);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tbl->zt_blks_copied == tbl->zt_numblks) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) dmu_free_range(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_blk << bs, tbl->zt_numblks << bs, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_blk = newblk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_numblks *= 2;
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_shift++;
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_nextblk = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_blks_copied = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("finished; numblocks now %llu (%lluk entries)\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens tbl->zt_numblks, 1<<(tbl->zt_shift-10));
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val,
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t blk, off;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int bs = FZAP_BLOCK_SHIFT(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_t *db;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tbl->zt_blk != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("storing %llx at index %llx\n", val, idx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens blk = idx >> (bs-3);
fa9e4066f08beec538e775443c5be79dd423fcabahrens off = idx & ((1<<(bs-3))-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens (tbl->zt_blk + blk) << bs, FTAG, &db);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(db, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tbl->zt_nextblk != 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t idx2 = idx * 2;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t blk2 = idx2 >> (bs-3);
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t off2 = idx2 & ((1<<(bs-3))-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_t *db2;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens (tbl->zt_nextblk + blk2) << bs, FTAG, &db2);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(db, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(db2, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ((uint64_t *)db2->db_data)[off2] = val;
fa9e4066f08beec538e775443c5be79dd423fcabahrens ((uint64_t *)db2->db_data)[off2+1] = val;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(db2, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ((uint64_t *)db->db_data)[off] = val;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(db, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t blk, off;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_t *db;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int bs = FZAP_BLOCK_SHIFT(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens blk = idx >> (bs-3);
fa9e4066f08beec538e775443c5be79dd423fcabahrens off = idx & ((1<<(bs-3))-1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens (tbl->zt_blk + blk) << bs, FTAG, &db);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens *valp = ((uint64_t *)db->db_data)[off];
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(db, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tbl->zt_nextblk != 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * read the nextblk for the sake of i/o error checking,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * so that zap_table_load() will catch errors for
fa9e4066f08beec538e775443c5be79dd423fcabahrens * zap_table_store.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens blk = (idx*2) >> (bs-3);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens (tbl->zt_nextblk + blk) << bs, FTAG, &db);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(db, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Routines for growing the ptrtbl.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int i;
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < n; i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t lb = src[i];
fa9e4066f08beec538e775443c5be79dd423fcabahrens dst[2*i+0] = lb;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dst[2*i+1] = lb;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* In case things go horribly wrong. */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift >= ZAP_HASHBITS-2)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (ENOSPC);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * We are outgrowing the "embedded" ptrtbl (the one
fa9e4066f08beec538e775443c5be79dd423fcabahrens * stored in the header block). Give it its own entire
fa9e4066f08beec538e775443c5be79dd423fcabahrens * block, which will double the size of the ptrtbl.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t newblk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_t *db_new;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==,
fa9e4066f08beec538e775443c5be79dd423fcabahrens ZAP_EMBEDDED_PTRTBL_SHIFT(zap));
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_blk, ==, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens newblk = zap_allocate_blocks(zap, 1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(db_new, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0),
fa9e4066f08beec538e775443c5be79dd423fcabahrens db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap));
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(db_new, FTAG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_blk = newblk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks = 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_shift++;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==,
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks <<
fa9e4066f08beec538e775443c5be79dd423fcabahrens (FZAP_BLOCK_SHIFT(zap)-3));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (zap_table_grow(zap, &zap->zap_f.zap_phys->zap_ptrtbl,
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_ptrtbl_transfer, tx));
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(zap->zap_dbuf, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(delta > 0 || zap->zap_f.zap_phys->zap_num_entries >= -delta);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_f.zap_phys->zap_num_entries += delta;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic uint64_t
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_allocate_blocks(zap_t *zap, int nblocks)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t newblk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens newblk = zap->zap_f.zap_phys->zap_freeblk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_f.zap_phys->zap_freeblk += nblocks;
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (newblk);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic zap_leaf_t *
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_create_leaf(zap_t *zap, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens void *winner;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_init(&l->l_rwlock, 0, 0, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_enter(&l->l_rwlock, RW_WRITER);
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_blkid = zap_allocate_blocks(zap, 1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_dbuf = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_phys = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf));
fa9e4066f08beec538e775443c5be79dd423fcabahrens winner = dmu_buf_set_user(l->l_dbuf, l, &l->l_phys, zap_leaf_pageout);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(winner == NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(l->l_dbuf, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_init(l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_f.zap_phys->zap_num_leafs++;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_count(zap_t *zap, uint64_t *count)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(!zap->zap_ismicro);
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */
fa9e4066f08beec538e775443c5be79dd423fcabahrens *count = zap->zap_f.zap_phys->zap_num_entries;
fa9e4066f08beec538e775443c5be79dd423fcabahrens mutex_exit(&zap->zap_f.zap_num_entries_mtx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
87e5029a3226958edab1512d6182bc74d8d80c9aahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Routines for obtaining zap_leaf_t's
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_put_leaf(zap_leaf_t *l)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_exit(&l->l_rwlock);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_rele(l->l_dbuf, NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens_NOTE(ARGSUSED(0))
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_leaf_pageout(dmu_buf_t *db, void *vl)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l = vl;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_destroy(&l->l_rwlock);
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(l, sizeof (zap_leaf_t));
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic zap_leaf_t *
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_open_leaf(uint64_t blkid, dmu_buf_t *db)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l, *winner;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(blkid != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens l = kmem_alloc(sizeof (zap_leaf_t), KM_SLEEP);
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_init(&l->l_rwlock, 0, 0, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_enter(&l->l_rwlock, RW_WRITER);
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_blkid = blkid;
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_bs = highbit(db->db_size)-1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_dbuf = db;
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_phys = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens winner = dmu_buf_set_user(db, l, &l->l_phys, zap_leaf_pageout);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_exit(&l->l_rwlock);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (winner != NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* someone else set it first */
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_pageout(NULL, l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens l = winner;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * lhr_pad was previously used for the next leaf in the leaf
fa9e4066f08beec538e775443c5be79dd423fcabahrens * chain. There should be no chained leafs (as we have removed
fa9e4066f08beec538e775443c5be79dd423fcabahrens * support for them).
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(l->l_phys->l_hdr.lh_pad1, ==, 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * There should be more hash entries than there can be
fa9e4066f08beec538e775443c5be79dd423fcabahrens * chunks to put in the hash table
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(ZAP_LEAF_HASH_NUMENTRIES(l), >, ZAP_LEAF_NUMCHUNKS(l) / 3);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* The chunks should begin at the end of the hash table */
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==,
fa9e4066f08beec538e775443c5be79dd423fcabahrens &l->l_phys->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* The chunks should end at the end of the block */
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) -
fa9e4066f08beec538e775443c5be79dd423fcabahrens (uintptr_t)l->l_phys, ==, l->l_dbuf->db_size);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt,
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t **lp)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_t *db;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int bs = FZAP_BLOCK_SHIFT(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
fa9e4066f08beec538e775443c5be79dd423fcabahrens blkid << bs, NULL, &db);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(db->db_object, ==, zap->zap_object);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(db->db_offset, ==, blkid << bs);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(db->db_size, ==, 1 << bs);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(blkid != 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens l = dmu_buf_get_user(db);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (l == NULL)
fa9e4066f08beec538e775443c5be79dd423fcabahrens l = zap_open_leaf(blkid, db);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_enter(&l->l_rwlock, lt);
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Must lock before dirtying, otherwise l->l_phys could change,
fa9e4066f08beec538e775443c5be79dd423fcabahrens * causing ASSERT below to fail.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (lt == RW_WRITER)
fa9e4066f08beec538e775443c5be79dd423fcabahrens dmu_buf_will_dirty(db, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(l->l_blkid, ==, blkid);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3P(l->l_dbuf, ==, db);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3P(l->l_phys, ==, l->l_dbuf->db_data);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(l->l_phys->l_hdr.lh_block_type, ==, ZBT_LEAF);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(l->l_phys->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens *lp = l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(idx, <,
fa9e4066f08beec538e775443c5be79dd423fcabahrens (1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift));
fa9e4066f08beec538e775443c5be79dd423fcabahrens *valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (zap_table_load(zap, &zap->zap_f.zap_phys->zap_ptrtbl,
fa9e4066f08beec538e775443c5be79dd423fcabahrens idx, valp));
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(tx != NULL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (zap_table_store(zap, &zap->zap_f.zap_phys->zap_ptrtbl,
fa9e4066f08beec538e775443c5be79dd423fcabahrens idx, blk, tx));
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t idx, blk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(zap->zap_dbuf == NULL ||
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_f.zap_phys == zap->zap_dbuf->db_data);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(zap->zap_f.zap_phys->zap_magic, ==, ZAP_MAGIC);
fa9e4066f08beec538e775443c5be79dd423fcabahrens idx = ZAP_HASH_IDX(h, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_idx_to_blk(zap, idx, &blk);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_get_leaf_byblk(zap, blk, tx, lt, lp);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(err || ZAP_HASH_IDX(h, (*lp)->l_phys->l_hdr.lh_prefix_len) ==
fa9e4066f08beec538e775443c5be79dd423fcabahrens (*lp)->l_phys->l_hdr.lh_prefix);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_expand_leaf(zap_t *zap, zap_leaf_t *l, uint64_t hash, dmu_tx_t *tx,
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t **lp)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *nl;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int prefix_diff, i, err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t sibling;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int old_prefix_len = l->l_phys->l_hdr.lh_prefix_len;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(old_prefix_len, <=, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==,
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_phys->l_hdr.lh_prefix);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap_tryupgradedir(zap, tx) == 0 ||
fa9e4066f08beec538e775443c5be79dd423fcabahrens old_prefix_len == zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* We failed to upgrade, or need to grow the pointer table */
fa9e4066f08beec538e775443c5be79dd423fcabahrens objset_t *os = zap->zap_objset;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t object = zap->zap_object;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf(l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_unlockdir(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_lockdir(os, object, tx, RW_WRITER, FALSE, &zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(!zap->zap_ismicro);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens while (old_prefix_len ==
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_grow_ptrtbl(zap, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (l->l_phys->l_hdr.lh_prefix_len != old_prefix_len) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* it split while our locks were down */
fa9e4066f08beec538e775443c5be79dd423fcabahrens *lp = l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(old_prefix_len, <, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==,
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_phys->l_hdr.lh_prefix);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens prefix_diff = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift -
fa9e4066f08beec538e775443c5be79dd423fcabahrens (old_prefix_len + 1);
fa9e4066f08beec538e775443c5be79dd423fcabahrens sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* check for i/o errors before doing zap_leaf_split */
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < (1ULL<<prefix_diff); i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t blk;
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_idx_to_blk(zap, sibling+i, &blk);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(blk, ==, l->l_blkid);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens nl = zap_create_leaf(zap, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_split(l, nl);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* set sibling pointers */
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < (1ULL<<prefix_diff); i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT3U(err, ==, 0); /* we checked for i/o errors above */
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (hash & (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len))) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* we want the sibling */
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf(l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens *lp = nl;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf(nl);
fa9e4066f08beec538e775443c5be79dd423fcabahrens *lp = l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_put_leaf_maybe_grow_ptrtbl(zap_t *zap, zap_leaf_t *l, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int leaffull = (l->l_phys->l_hdr.lh_prefix_len == shift &&
fa9e4066f08beec538e775443c5be79dd423fcabahrens l->l_phys->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf(l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (leaffull || zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * We are in the middle of growing the pointer table, or
fa9e4066f08beec538e775443c5be79dd423fcabahrens * this leaf will soon make us grow it.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap_tryupgradedir(zap, tx) == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens objset_t *os = zap->zap_objset;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t zapobj = zap->zap_object;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_unlockdir(zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_lockdir(os, zapobj, tx,
fa9e4066f08beec538e775443c5be79dd423fcabahrens RW_WRITER, FALSE, &zap);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* could have finished growing while our locks were down */
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift == shift)
fa9e4066f08beec538e775443c5be79dd423fcabahrens (void) zap_grow_ptrtbl(zap, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic int
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_checksize(const char *name, uint64_t integer_size, uint64_t num_integers)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (name && strlen(name) > ZAP_MAXNAMELEN)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (E2BIG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* Only integer sizes supported by C */
fa9e4066f08beec538e775443c5be79dd423fcabahrens switch (integer_size) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens case 1:
fa9e4066f08beec538e775443c5be79dd423fcabahrens case 2:
fa9e4066f08beec538e775443c5be79dd423fcabahrens case 4:
fa9e4066f08beec538e775443c5be79dd423fcabahrens case 8:
fa9e4066f08beec538e775443c5be79dd423fcabahrens break;
fa9e4066f08beec538e775443c5be79dd423fcabahrens default:
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (EINVAL);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (integer_size * num_integers > ZAP_MAXVALUELEN)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (E2BIG);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Routines for maniplulating attributes.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_lookup(zap_t *zap, const char *name,
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t integer_size, uint64_t num_integers, void *buf)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_entry_handle_t zeh;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = fzap_checksize(name, integer_size, num_integers);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens hash = zap_hash(zap, name);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_deref_leaf(zap, hash, NULL, RW_READER, &l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_leaf_lookup(l, name, hash, &zeh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_entry_read(&zeh, integer_size, num_integers, buf);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf(l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_add_cd(zap_t *zap, const char *name,
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t integer_size, uint64_t num_integers,
fa9e4066f08beec538e775443c5be79dd423fcabahrens const void *val, uint32_t cd, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_entry_handle_t zeh;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(!zap->zap_ismicro);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(fzap_checksize(name, integer_size, num_integers) == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens hash = zap_hash(zap, name);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrensretry:
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_leaf_lookup(l, name, hash, &zeh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = EEXIST;
fa9e4066f08beec538e775443c5be79dd423fcabahrens goto out;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != ENOENT)
fa9e4066f08beec538e775443c5be79dd423fcabahrens goto out;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_entry_create(l, name, hash, cd,
fa9e4066f08beec538e775443c5be79dd423fcabahrens integer_size, num_integers, val, &zeh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_increment_num_entries(zap, 1, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else if (err == EAGAIN) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_expand_leaf(zap, l, hash, tx, &l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens goto retry;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensout:
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf_maybe_grow_ptrtbl(zap, l, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_add(zap_t *zap, const char *name,
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t integer_size, uint64_t num_integers,
fa9e4066f08beec538e775443c5be79dd423fcabahrens const void *val, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err = fzap_checksize(name, integer_size, num_integers);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (fzap_add_cd(zap, name, integer_size, num_integers,
fa9e4066f08beec538e775443c5be79dd423fcabahrens val, ZAP_MAXCD, tx));
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_update(zap_t *zap, const char *name,
fa9e4066f08beec538e775443c5be79dd423fcabahrens int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err, create;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_entry_handle_t zeh;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = fzap_checksize(name, integer_size, num_integers);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens hash = zap_hash(zap, name);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrensretry:
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_leaf_lookup(l, name, hash, &zeh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens create = (err == ENOENT);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(err == 0 || err == ENOENT);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* XXX If this leaf is chained, split it if we can. */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (create) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_entry_create(l, name, hash, ZAP_MAXCD,
fa9e4066f08beec538e775443c5be79dd423fcabahrens integer_size, num_integers, val, &zeh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_increment_num_entries(zap, 1, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_entry_update(&zeh, integer_size, num_integers, val);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == EAGAIN) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_expand_leaf(zap, l, hash, tx, &l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens goto retry;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensout:
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf_maybe_grow_ptrtbl(zap, l, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_length(zap_t *zap, const char *name,
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t *integer_size, uint64_t *num_integers)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_entry_handle_t zeh;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens hash = zap_hash(zap, name);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_deref_leaf(zap, hash, NULL, RW_READER, &l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_leaf_lookup(l, name, hash, &zeh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens goto out;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (integer_size)
fa9e4066f08beec538e775443c5be79dd423fcabahrens *integer_size = zeh.zeh_integer_size;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (num_integers)
fa9e4066f08beec538e775443c5be79dd423fcabahrens *num_integers = zeh.zeh_num_integers;
fa9e4066f08beec538e775443c5be79dd423fcabahrensout:
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf(l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_remove(zap_t *zap, const char *name, dmu_tx_t *tx)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_entry_handle_t zeh;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens hash = zap_hash(zap, name);
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens err = zap_leaf_lookup(l, name, hash, &zeh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_entry_remove(&zeh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_increment_num_entries(zap, -1, tx);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf(l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens dprintf("fzap_remove: ds=%p obj=%llu name=%s err=%d\n",
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap->zap_objset, zap->zap_object, name, err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, char *name)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_cursor_t zc;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_attribute_t *za;
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (zap_cursor_init(&zc, os, zapobj);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens (err = zap_cursor_retrieve(&zc, za)) == 0;
87e5029a3226958edab1512d6182bc74d8d80c9aahrens zap_cursor_advance(&zc)) {
87e5029a3226958edab1512d6182bc74d8d80c9aahrens if (za->za_first_integer == value) {
87e5029a3226958edab1512d6182bc74d8d80c9aahrens (void) strcpy(name, za->za_name);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens break;
87e5029a3226958edab1512d6182bc74d8d80c9aahrens }
87e5029a3226958edab1512d6182bc74d8d80c9aahrens }
87e5029a3226958edab1512d6182bc74d8d80c9aahrens zap_cursor_fini(&zc);
fa9e4066f08beec538e775443c5be79dd423fcabahrens kmem_free(za, sizeof (zap_attribute_t));
87e5029a3226958edab1512d6182bc74d8d80c9aahrens return (err);
87e5029a3226958edab1512d6182bc74d8d80c9aahrens}
87e5029a3226958edab1512d6182bc74d8d80c9aahrens
87e5029a3226958edab1512d6182bc74d8d80c9aahrens
87e5029a3226958edab1512d6182bc74d8d80c9aahrens/*
87e5029a3226958edab1512d6182bc74d8d80c9aahrens * Routines for iterating over the attributes.
87e5029a3226958edab1512d6182bc74d8d80c9aahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensint
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int err = ENOENT;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_entry_handle_t zeh;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /* retrieve the next entry at or after zc_hash/zc_cd */
87e5029a3226958edab1512d6182bc74d8d80c9aahrens /* if no entry, return ENOENT */
87e5029a3226958edab1512d6182bc74d8d80c9aahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zc->zc_leaf &&
fa9e4066f08beec538e775443c5be79dd423fcabahrens (ZAP_HASH_IDX(zc->zc_hash,
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_leaf->l_phys->l_hdr.lh_prefix_len) !=
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_leaf->l_phys->l_hdr.lh_prefix)) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf(zc->zc_leaf);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_leaf = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensagain:
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zc->zc_leaf == NULL) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_deref_leaf(zap, zc->zc_hash, NULL, RW_READER,
fa9e4066f08beec538e775443c5be79dd423fcabahrens &zc->zc_leaf);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err != 0)
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_enter(&zc->zc_leaf->l_rwlock, RW_READER);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens l = zc->zc_leaf;
87e5029a3226958edab1512d6182bc74d8d80c9aahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_leaf_lookup_closest(l, zc->zc_hash, zc->zc_cd, &zeh);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == ENOENT) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t nocare =
fa9e4066f08beec538e775443c5be79dd423fcabahrens (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len)) - 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_cd = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (l->l_phys->l_hdr.lh_prefix_len == 0 || zc->zc_hash == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_hash = -1ULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf(zc->zc_leaf);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_leaf = NULL;
fa9e4066f08beec538e775443c5be79dd423fcabahrens goto again;
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_hash = zeh.zeh_hash;
fa9e4066f08beec538e775443c5be79dd423fcabahrens zc->zc_cd = zeh.zeh_cd;
fa9e4066f08beec538e775443c5be79dd423fcabahrens za->za_integer_length = zeh.zeh_integer_size;
fa9e4066f08beec538e775443c5be79dd423fcabahrens za->za_num_integers = zeh.zeh_num_integers;
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (zeh.zeh_num_integers == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens za->za_first_integer = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens } else {
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_entry_read(&zeh, 8, 1, &za->za_first_integer);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(err == 0 || err == EOVERFLOW);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_entry_read_name(&zeh,
fa9e4066f08beec538e775443c5be79dd423fcabahrens sizeof (za->za_name), za->za_name);
fa9e4066f08beec538e775443c5be79dd423fcabahrens ASSERT(err == 0);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens rw_exit(&zc->zc_leaf->l_rwlock);
fa9e4066f08beec538e775443c5be79dd423fcabahrens return (err);
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensstatic void
fa9e4066f08beec538e775443c5be79dd423fcabahrenszap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs)
fa9e4066f08beec538e775443c5be79dd423fcabahrens{
fa9e4066f08beec538e775443c5be79dd423fcabahrens int i, err;
fa9e4066f08beec538e775443c5be79dd423fcabahrens uint64_t lastblk = 0;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens /*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * NB: if a leaf has more pointers than an entire ptrtbl block
fa9e4066f08beec538e775443c5be79dd423fcabahrens * can hold, then it'll be accounted for more than once, since
fa9e4066f08beec538e775443c5be79dd423fcabahrens * we won't have lastblk.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens for (i = 0; i < len; i++) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_t *l;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (tbl[i] == lastblk)
fa9e4066f08beec538e775443c5be79dd423fcabahrens continue;
fa9e4066f08beec538e775443c5be79dd423fcabahrens lastblk = tbl[i];
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens if (err == 0) {
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_leaf_stats(zap, l, zs);
fa9e4066f08beec538e775443c5be79dd423fcabahrens zap_put_leaf(l);
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens }
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensvoid
fa9e4066f08beec538e775443c5be79dd423fcabahrensfzap_get_stats(zap_t *zap, zap_stats_t *zs)
{
int bs = FZAP_BLOCK_SHIFT(zap);
zs->zs_blocksize = 1ULL << bs;
/*
* Set zap_phys_t fields
*/
zs->zs_num_leafs = zap->zap_f.zap_phys->zap_num_leafs;
zs->zs_num_entries = zap->zap_f.zap_phys->zap_num_entries;
zs->zs_num_blocks = zap->zap_f.zap_phys->zap_freeblk;
zs->zs_block_type = zap->zap_f.zap_phys->zap_block_type;
zs->zs_magic = zap->zap_f.zap_phys->zap_magic;
zs->zs_salt = zap->zap_f.zap_phys->zap_salt;
/*
* Set zap_ptrtbl fields
*/
zs->zs_ptrtbl_len = 1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift;
zs->zs_ptrtbl_nextblk = zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk;
zs->zs_ptrtbl_blks_copied =
zap->zap_f.zap_phys->zap_ptrtbl.zt_blks_copied;
zs->zs_ptrtbl_zt_blk = zap->zap_f.zap_phys->zap_ptrtbl.zt_blk;
zs->zs_ptrtbl_zt_numblks = zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks;
zs->zs_ptrtbl_zt_shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift;
if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) {
/* the ptrtbl is entirely in the header block. */
zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0),
1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs);
} else {
int b;
dmu_prefetch(zap->zap_objset, zap->zap_object,
zap->zap_f.zap_phys->zap_ptrtbl.zt_blk << bs,
zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks << bs);
for (b = 0; b < zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks;
b++) {
dmu_buf_t *db;
int err;
err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
(zap->zap_f.zap_phys->zap_ptrtbl.zt_blk + b) << bs,
FTAG, &db);
if (err == 0) {
zap_stats_ptrtbl(zap, db->db_data,
1<<(bs-3), zs);
dmu_buf_rele(db, FTAG);
}
}
}
}