1481 lines
36 KiB
C
1481 lines
36 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#include <sys/cred.h>
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#include <sys/zfs_context.h>
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#include <sys/dmu_objset.h>
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#include <sys/dsl_dir.h>
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#include <sys/dsl_dataset.h>
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#include <sys/dsl_prop.h>
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#include <sys/dsl_pool.h>
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#include <sys/dsl_synctask.h>
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#include <sys/dsl_deleg.h>
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#include <sys/dnode.h>
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#include <sys/dbuf.h>
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#include <sys/zvol.h>
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#include <sys/dmu_tx.h>
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#include <sys/zio_checksum.h>
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#include <sys/zap.h>
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#include <sys/zil.h>
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#include <sys/dmu_impl.h>
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#include <sys/zfs_ioctl.h>
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spa_t *
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dmu_objset_spa(objset_t *os)
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{
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return (os->os->os_spa);
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}
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zilog_t *
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dmu_objset_zil(objset_t *os)
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{
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return (os->os->os_zil);
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}
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dsl_pool_t *
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dmu_objset_pool(objset_t *os)
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{
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dsl_dataset_t *ds;
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if ((ds = os->os->os_dsl_dataset) != NULL && ds->ds_dir)
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return (ds->ds_dir->dd_pool);
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else
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return (spa_get_dsl(os->os->os_spa));
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}
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dsl_dataset_t *
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dmu_objset_ds(objset_t *os)
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{
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return (os->os->os_dsl_dataset);
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}
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dmu_objset_type_t
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dmu_objset_type(objset_t *os)
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{
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return (os->os->os_phys->os_type);
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}
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void
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dmu_objset_name(objset_t *os, char *buf)
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{
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dsl_dataset_name(os->os->os_dsl_dataset, buf);
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}
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uint64_t
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dmu_objset_id(objset_t *os)
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{
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dsl_dataset_t *ds = os->os->os_dsl_dataset;
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return (ds ? ds->ds_object : 0);
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}
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static void
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checksum_changed_cb(void *arg, uint64_t newval)
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{
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objset_impl_t *osi = arg;
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/*
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* Inheritance should have been done by now.
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*/
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ASSERT(newval != ZIO_CHECKSUM_INHERIT);
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osi->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
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}
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static void
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compression_changed_cb(void *arg, uint64_t newval)
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{
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objset_impl_t *osi = arg;
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/*
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* Inheritance and range checking should have been done by now.
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*/
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ASSERT(newval != ZIO_COMPRESS_INHERIT);
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osi->os_compress = zio_compress_select(newval, ZIO_COMPRESS_ON_VALUE);
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}
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static void
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copies_changed_cb(void *arg, uint64_t newval)
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{
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objset_impl_t *osi = arg;
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/*
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* Inheritance and range checking should have been done by now.
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*/
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ASSERT(newval > 0);
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ASSERT(newval <= spa_max_replication(osi->os_spa));
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osi->os_copies = newval;
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}
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static void
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primary_cache_changed_cb(void *arg, uint64_t newval)
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{
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objset_impl_t *osi = arg;
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/*
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* Inheritance and range checking should have been done by now.
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*/
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ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
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newval == ZFS_CACHE_METADATA);
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osi->os_primary_cache = newval;
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}
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static void
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secondary_cache_changed_cb(void *arg, uint64_t newval)
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{
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objset_impl_t *osi = arg;
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/*
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* Inheritance and range checking should have been done by now.
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*/
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ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
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newval == ZFS_CACHE_METADATA);
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osi->os_secondary_cache = newval;
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}
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void
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dmu_objset_byteswap(void *buf, size_t size)
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{
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objset_phys_t *osp = buf;
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ASSERT(size == OBJSET_OLD_PHYS_SIZE || size == sizeof (objset_phys_t));
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dnode_byteswap(&osp->os_meta_dnode);
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byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t));
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osp->os_type = BSWAP_64(osp->os_type);
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osp->os_flags = BSWAP_64(osp->os_flags);
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if (size == sizeof (objset_phys_t)) {
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dnode_byteswap(&osp->os_userused_dnode);
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dnode_byteswap(&osp->os_groupused_dnode);
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}
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}
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int
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dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
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objset_impl_t **osip)
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{
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objset_impl_t *osi;
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int i, err;
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ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
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osi = kmem_zalloc(sizeof (objset_impl_t), KM_SLEEP);
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osi->os.os = osi;
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osi->os_dsl_dataset = ds;
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osi->os_spa = spa;
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osi->os_rootbp = bp;
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if (!BP_IS_HOLE(osi->os_rootbp)) {
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uint32_t aflags = ARC_WAIT;
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zbookmark_t zb;
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zb.zb_objset = ds ? ds->ds_object : 0;
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zb.zb_object = 0;
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zb.zb_level = -1;
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zb.zb_blkid = 0;
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if (DMU_OS_IS_L2CACHEABLE(osi))
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aflags |= ARC_L2CACHE;
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dprintf_bp(osi->os_rootbp, "reading %s", "");
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/*
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* NB: when bprewrite scrub can change the bp,
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* and this is called from dmu_objset_open_ds_os, the bp
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* could change, and we'll need a lock.
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*/
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err = arc_read_nolock(NULL, spa, osi->os_rootbp,
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arc_getbuf_func, &osi->os_phys_buf,
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ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &aflags, &zb);
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if (err) {
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kmem_free(osi, sizeof (objset_impl_t));
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/* convert checksum errors into IO errors */
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if (err == ECKSUM)
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err = EIO;
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return (err);
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}
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/* Increase the blocksize if we are permitted. */
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if (spa_version(spa) >= SPA_VERSION_USERSPACE &&
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arc_buf_size(osi->os_phys_buf) < sizeof (objset_phys_t)) {
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arc_buf_t *buf = arc_buf_alloc(spa,
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sizeof (objset_phys_t), &osi->os_phys_buf,
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ARC_BUFC_METADATA);
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bzero(buf->b_data, sizeof (objset_phys_t));
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bcopy(osi->os_phys_buf->b_data, buf->b_data,
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arc_buf_size(osi->os_phys_buf));
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(void) arc_buf_remove_ref(osi->os_phys_buf,
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&osi->os_phys_buf);
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osi->os_phys_buf = buf;
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}
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osi->os_phys = osi->os_phys_buf->b_data;
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osi->os_flags = osi->os_phys->os_flags;
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} else {
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int size = spa_version(spa) >= SPA_VERSION_USERSPACE ?
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sizeof (objset_phys_t) : OBJSET_OLD_PHYS_SIZE;
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osi->os_phys_buf = arc_buf_alloc(spa, size,
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&osi->os_phys_buf, ARC_BUFC_METADATA);
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osi->os_phys = osi->os_phys_buf->b_data;
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bzero(osi->os_phys, size);
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}
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/*
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* Note: the changed_cb will be called once before the register
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* func returns, thus changing the checksum/compression from the
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* default (fletcher2/off). Snapshots don't need to know about
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* checksum/compression/copies.
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*/
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if (ds) {
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err = dsl_prop_register(ds, "primarycache",
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primary_cache_changed_cb, osi);
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if (err == 0)
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err = dsl_prop_register(ds, "secondarycache",
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secondary_cache_changed_cb, osi);
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if (!dsl_dataset_is_snapshot(ds)) {
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if (err == 0)
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err = dsl_prop_register(ds, "checksum",
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checksum_changed_cb, osi);
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if (err == 0)
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err = dsl_prop_register(ds, "compression",
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compression_changed_cb, osi);
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if (err == 0)
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err = dsl_prop_register(ds, "copies",
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copies_changed_cb, osi);
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}
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if (err) {
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VERIFY(arc_buf_remove_ref(osi->os_phys_buf,
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&osi->os_phys_buf) == 1);
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kmem_free(osi, sizeof (objset_impl_t));
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return (err);
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}
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} else if (ds == NULL) {
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/* It's the meta-objset. */
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osi->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
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osi->os_compress = ZIO_COMPRESS_LZJB;
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osi->os_copies = spa_max_replication(spa);
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osi->os_primary_cache = ZFS_CACHE_ALL;
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osi->os_secondary_cache = ZFS_CACHE_ALL;
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}
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osi->os_zil_header = osi->os_phys->os_zil_header;
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osi->os_zil = zil_alloc(&osi->os, &osi->os_zil_header);
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for (i = 0; i < TXG_SIZE; i++) {
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list_create(&osi->os_dirty_dnodes[i], sizeof (dnode_t),
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offsetof(dnode_t, dn_dirty_link[i]));
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list_create(&osi->os_free_dnodes[i], sizeof (dnode_t),
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offsetof(dnode_t, dn_dirty_link[i]));
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}
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list_create(&osi->os_dnodes, sizeof (dnode_t),
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offsetof(dnode_t, dn_link));
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list_create(&osi->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
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offsetof(dmu_buf_impl_t, db_link));
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mutex_init(&osi->os_lock, NULL, MUTEX_DEFAULT, NULL);
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mutex_init(&osi->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
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mutex_init(&osi->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
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osi->os_meta_dnode = dnode_special_open(osi,
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&osi->os_phys->os_meta_dnode, DMU_META_DNODE_OBJECT);
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if (arc_buf_size(osi->os_phys_buf) >= sizeof (objset_phys_t)) {
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osi->os_userused_dnode = dnode_special_open(osi,
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&osi->os_phys->os_userused_dnode, DMU_USERUSED_OBJECT);
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osi->os_groupused_dnode = dnode_special_open(osi,
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&osi->os_phys->os_groupused_dnode, DMU_GROUPUSED_OBJECT);
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}
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/*
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* We should be the only thread trying to do this because we
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* have ds_opening_lock
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*/
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if (ds) {
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VERIFY(NULL == dsl_dataset_set_user_ptr(ds, osi,
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dmu_objset_evict));
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}
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*osip = osi;
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return (0);
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}
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static int
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dmu_objset_open_ds_os(dsl_dataset_t *ds, objset_t *os, dmu_objset_type_t type)
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{
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objset_impl_t *osi;
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mutex_enter(&ds->ds_opening_lock);
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osi = dsl_dataset_get_user_ptr(ds);
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if (osi == NULL) {
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int err;
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err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
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ds, &ds->ds_phys->ds_bp, &osi);
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if (err) {
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mutex_exit(&ds->ds_opening_lock);
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return (err);
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}
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}
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mutex_exit(&ds->ds_opening_lock);
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os->os = osi;
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os->os_mode = DS_MODE_NOHOLD;
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if (type != DMU_OST_ANY && type != os->os->os_phys->os_type)
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return (EINVAL);
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return (0);
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}
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int
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dmu_objset_open_ds(dsl_dataset_t *ds, dmu_objset_type_t type, objset_t **osp)
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{
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objset_t *os;
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int err;
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os = kmem_alloc(sizeof (objset_t), KM_SLEEP);
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err = dmu_objset_open_ds_os(ds, os, type);
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if (err)
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kmem_free(os, sizeof (objset_t));
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else
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*osp = os;
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return (err);
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}
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/* called from zpl */
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int
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dmu_objset_open(const char *name, dmu_objset_type_t type, int mode,
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objset_t **osp)
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{
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objset_t *os;
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dsl_dataset_t *ds;
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int err;
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ASSERT(DS_MODE_TYPE(mode) == DS_MODE_USER ||
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DS_MODE_TYPE(mode) == DS_MODE_OWNER);
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os = kmem_alloc(sizeof (objset_t), KM_SLEEP);
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if (DS_MODE_TYPE(mode) == DS_MODE_USER)
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err = dsl_dataset_hold(name, os, &ds);
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else
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err = dsl_dataset_own(name, mode, os, &ds);
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if (err) {
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kmem_free(os, sizeof (objset_t));
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return (err);
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}
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err = dmu_objset_open_ds_os(ds, os, type);
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if (err) {
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if (DS_MODE_TYPE(mode) == DS_MODE_USER)
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dsl_dataset_rele(ds, os);
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else
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dsl_dataset_disown(ds, os);
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kmem_free(os, sizeof (objset_t));
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} else {
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os->os_mode = mode;
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*osp = os;
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}
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return (err);
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}
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void
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dmu_objset_close(objset_t *os)
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{
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ASSERT(DS_MODE_TYPE(os->os_mode) == DS_MODE_USER ||
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DS_MODE_TYPE(os->os_mode) == DS_MODE_OWNER ||
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DS_MODE_TYPE(os->os_mode) == DS_MODE_NOHOLD);
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if (DS_MODE_TYPE(os->os_mode) == DS_MODE_USER)
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dsl_dataset_rele(os->os->os_dsl_dataset, os);
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else if (DS_MODE_TYPE(os->os_mode) == DS_MODE_OWNER)
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dsl_dataset_disown(os->os->os_dsl_dataset, os);
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kmem_free(os, sizeof (objset_t));
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}
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int
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dmu_objset_evict_dbufs(objset_t *os)
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{
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objset_impl_t *osi = os->os;
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dnode_t *dn;
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mutex_enter(&osi->os_lock);
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/* process the mdn last, since the other dnodes have holds on it */
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list_remove(&osi->os_dnodes, osi->os_meta_dnode);
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list_insert_tail(&osi->os_dnodes, osi->os_meta_dnode);
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/*
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* Find the first dnode with holds. We have to do this dance
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* because dnode_add_ref() only works if you already have a
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* hold. If there are no holds then it has no dbufs so OK to
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* skip.
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*/
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for (dn = list_head(&osi->os_dnodes);
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dn && !dnode_add_ref(dn, FTAG);
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dn = list_next(&osi->os_dnodes, dn))
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continue;
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while (dn) {
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dnode_t *next_dn = dn;
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do {
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next_dn = list_next(&osi->os_dnodes, next_dn);
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} while (next_dn && !dnode_add_ref(next_dn, FTAG));
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mutex_exit(&osi->os_lock);
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dnode_evict_dbufs(dn);
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dnode_rele(dn, FTAG);
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mutex_enter(&osi->os_lock);
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dn = next_dn;
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}
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mutex_exit(&osi->os_lock);
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return (list_head(&osi->os_dnodes) != osi->os_meta_dnode);
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}
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|
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void
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dmu_objset_evict(dsl_dataset_t *ds, void *arg)
|
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{
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objset_impl_t *osi = arg;
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objset_t os;
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int i;
|
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for (i = 0; i < TXG_SIZE; i++) {
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ASSERT(list_head(&osi->os_dirty_dnodes[i]) == NULL);
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ASSERT(list_head(&osi->os_free_dnodes[i]) == NULL);
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}
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if (ds) {
|
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if (!dsl_dataset_is_snapshot(ds)) {
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VERIFY(0 == dsl_prop_unregister(ds, "checksum",
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checksum_changed_cb, osi));
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VERIFY(0 == dsl_prop_unregister(ds, "compression",
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compression_changed_cb, osi));
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VERIFY(0 == dsl_prop_unregister(ds, "copies",
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copies_changed_cb, osi));
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}
|
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VERIFY(0 == dsl_prop_unregister(ds, "primarycache",
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primary_cache_changed_cb, osi));
|
|
VERIFY(0 == dsl_prop_unregister(ds, "secondarycache",
|
|
secondary_cache_changed_cb, osi));
|
|
}
|
|
|
|
/*
|
|
* We should need only a single pass over the dnode list, since
|
|
* nothing can be added to the list at this point.
|
|
*/
|
|
os.os = osi;
|
|
(void) dmu_objset_evict_dbufs(&os);
|
|
|
|
dnode_special_close(osi->os_meta_dnode);
|
|
if (osi->os_userused_dnode) {
|
|
dnode_special_close(osi->os_userused_dnode);
|
|
dnode_special_close(osi->os_groupused_dnode);
|
|
}
|
|
zil_free(osi->os_zil);
|
|
|
|
ASSERT3P(list_head(&osi->os_dnodes), ==, NULL);
|
|
|
|
VERIFY(arc_buf_remove_ref(osi->os_phys_buf, &osi->os_phys_buf) == 1);
|
|
mutex_destroy(&osi->os_lock);
|
|
mutex_destroy(&osi->os_obj_lock);
|
|
mutex_destroy(&osi->os_user_ptr_lock);
|
|
kmem_free(osi, sizeof (objset_impl_t));
|
|
}
|
|
|
|
/* called from dsl for meta-objset */
|
|
objset_impl_t *
|
|
dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
|
|
dmu_objset_type_t type, dmu_tx_t *tx)
|
|
{
|
|
objset_impl_t *osi;
|
|
dnode_t *mdn;
|
|
|
|
ASSERT(dmu_tx_is_syncing(tx));
|
|
if (ds)
|
|
mutex_enter(&ds->ds_opening_lock);
|
|
VERIFY(0 == dmu_objset_open_impl(spa, ds, bp, &osi));
|
|
if (ds)
|
|
mutex_exit(&ds->ds_opening_lock);
|
|
mdn = osi->os_meta_dnode;
|
|
|
|
dnode_allocate(mdn, DMU_OT_DNODE, 1 << DNODE_BLOCK_SHIFT,
|
|
DN_MAX_INDBLKSHIFT, DMU_OT_NONE, 0, tx);
|
|
|
|
/*
|
|
* We don't want to have to increase the meta-dnode's nlevels
|
|
* later, because then we could do it in quescing context while
|
|
* we are also accessing it in open context.
|
|
*
|
|
* This precaution is not necessary for the MOS (ds == NULL),
|
|
* because the MOS is only updated in syncing context.
|
|
* This is most fortunate: the MOS is the only objset that
|
|
* needs to be synced multiple times as spa_sync() iterates
|
|
* to convergence, so minimizing its dn_nlevels matters.
|
|
*/
|
|
if (ds != NULL) {
|
|
int levels = 1;
|
|
|
|
/*
|
|
* Determine the number of levels necessary for the meta-dnode
|
|
* to contain DN_MAX_OBJECT dnodes.
|
|
*/
|
|
while ((uint64_t)mdn->dn_nblkptr << (mdn->dn_datablkshift +
|
|
(levels - 1) * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) <
|
|
DN_MAX_OBJECT * sizeof (dnode_phys_t))
|
|
levels++;
|
|
|
|
mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] =
|
|
mdn->dn_nlevels = levels;
|
|
}
|
|
|
|
ASSERT(type != DMU_OST_NONE);
|
|
ASSERT(type != DMU_OST_ANY);
|
|
ASSERT(type < DMU_OST_NUMTYPES);
|
|
osi->os_phys->os_type = type;
|
|
if (dmu_objset_userused_enabled(osi)) {
|
|
osi->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
|
|
osi->os_flags = osi->os_phys->os_flags;
|
|
}
|
|
|
|
dsl_dataset_dirty(ds, tx);
|
|
|
|
return (osi);
|
|
}
|
|
|
|
struct oscarg {
|
|
void (*userfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
|
|
void *userarg;
|
|
dsl_dataset_t *clone_parent;
|
|
const char *lastname;
|
|
dmu_objset_type_t type;
|
|
uint64_t flags;
|
|
};
|
|
|
|
/*ARGSUSED*/
|
|
static int
|
|
dmu_objset_create_check(void *arg1, void *arg2, dmu_tx_t *tx)
|
|
{
|
|
dsl_dir_t *dd = arg1;
|
|
struct oscarg *oa = arg2;
|
|
objset_t *mos = dd->dd_pool->dp_meta_objset;
|
|
int err;
|
|
uint64_t ddobj;
|
|
|
|
err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj,
|
|
oa->lastname, sizeof (uint64_t), 1, &ddobj);
|
|
if (err != ENOENT)
|
|
return (err ? err : EEXIST);
|
|
|
|
if (oa->clone_parent != NULL) {
|
|
/*
|
|
* You can't clone across pools.
|
|
*/
|
|
if (oa->clone_parent->ds_dir->dd_pool != dd->dd_pool)
|
|
return (EXDEV);
|
|
|
|
/*
|
|
* You can only clone snapshots, not the head datasets.
|
|
*/
|
|
if (oa->clone_parent->ds_phys->ds_num_children == 0)
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
dmu_objset_create_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
|
|
{
|
|
dsl_dir_t *dd = arg1;
|
|
struct oscarg *oa = arg2;
|
|
dsl_dataset_t *ds;
|
|
blkptr_t *bp;
|
|
uint64_t dsobj;
|
|
|
|
ASSERT(dmu_tx_is_syncing(tx));
|
|
|
|
dsobj = dsl_dataset_create_sync(dd, oa->lastname,
|
|
oa->clone_parent, oa->flags, cr, tx);
|
|
|
|
VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool, dsobj, FTAG, &ds));
|
|
bp = dsl_dataset_get_blkptr(ds);
|
|
if (BP_IS_HOLE(bp)) {
|
|
objset_impl_t *osi;
|
|
|
|
/* This is an empty dmu_objset; not a clone. */
|
|
osi = dmu_objset_create_impl(dsl_dataset_get_spa(ds),
|
|
ds, bp, oa->type, tx);
|
|
|
|
if (oa->userfunc)
|
|
oa->userfunc(&osi->os, oa->userarg, cr, tx);
|
|
}
|
|
|
|
spa_history_internal_log(LOG_DS_CREATE, dd->dd_pool->dp_spa,
|
|
tx, cr, "dataset = %llu", dsobj);
|
|
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
|
|
int
|
|
dmu_objset_create(const char *name, dmu_objset_type_t type,
|
|
objset_t *clone_parent, uint64_t flags,
|
|
void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg)
|
|
{
|
|
dsl_dir_t *pdd;
|
|
const char *tail;
|
|
int err = 0;
|
|
struct oscarg oa = { 0 };
|
|
|
|
ASSERT(strchr(name, '@') == NULL);
|
|
err = dsl_dir_open(name, FTAG, &pdd, &tail);
|
|
if (err)
|
|
return (err);
|
|
if (tail == NULL) {
|
|
dsl_dir_close(pdd, FTAG);
|
|
return (EEXIST);
|
|
}
|
|
|
|
dprintf("name=%s\n", name);
|
|
|
|
oa.userfunc = func;
|
|
oa.userarg = arg;
|
|
oa.lastname = tail;
|
|
oa.type = type;
|
|
oa.flags = flags;
|
|
|
|
if (clone_parent != NULL) {
|
|
/*
|
|
* You can't clone to a different type.
|
|
*/
|
|
if (clone_parent->os->os_phys->os_type != type) {
|
|
dsl_dir_close(pdd, FTAG);
|
|
return (EINVAL);
|
|
}
|
|
oa.clone_parent = clone_parent->os->os_dsl_dataset;
|
|
}
|
|
err = dsl_sync_task_do(pdd->dd_pool, dmu_objset_create_check,
|
|
dmu_objset_create_sync, pdd, &oa, 5);
|
|
dsl_dir_close(pdd, FTAG);
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
dmu_objset_destroy(const char *name)
|
|
{
|
|
objset_t *os;
|
|
int error;
|
|
|
|
/*
|
|
* If it looks like we'll be able to destroy it, and there's
|
|
* an unplayed replay log sitting around, destroy the log.
|
|
* It would be nicer to do this in dsl_dataset_destroy_sync(),
|
|
* but the replay log objset is modified in open context.
|
|
*/
|
|
error = dmu_objset_open(name, DMU_OST_ANY,
|
|
DS_MODE_OWNER|DS_MODE_READONLY|DS_MODE_INCONSISTENT, &os);
|
|
if (error == 0) {
|
|
dsl_dataset_t *ds = os->os->os_dsl_dataset;
|
|
zil_destroy(dmu_objset_zil(os), B_FALSE);
|
|
|
|
error = dsl_dataset_destroy(ds, os);
|
|
/*
|
|
* dsl_dataset_destroy() closes the ds.
|
|
*/
|
|
kmem_free(os, sizeof (objset_t));
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* This will close the objset.
|
|
*/
|
|
int
|
|
dmu_objset_rollback(objset_t *os)
|
|
{
|
|
int err;
|
|
dsl_dataset_t *ds;
|
|
|
|
ds = os->os->os_dsl_dataset;
|
|
|
|
if (!dsl_dataset_tryown(ds, TRUE, os)) {
|
|
dmu_objset_close(os);
|
|
return (EBUSY);
|
|
}
|
|
|
|
err = dsl_dataset_rollback(ds, os->os->os_phys->os_type);
|
|
|
|
/*
|
|
* NB: we close the objset manually because the rollback
|
|
* actually implicitly called dmu_objset_evict(), thus freeing
|
|
* the objset_impl_t.
|
|
*/
|
|
dsl_dataset_disown(ds, os);
|
|
kmem_free(os, sizeof (objset_t));
|
|
return (err);
|
|
}
|
|
|
|
struct snaparg {
|
|
dsl_sync_task_group_t *dstg;
|
|
char *snapname;
|
|
char failed[MAXPATHLEN];
|
|
boolean_t checkperms;
|
|
nvlist_t *props;
|
|
};
|
|
|
|
static int
|
|
snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx)
|
|
{
|
|
objset_t *os = arg1;
|
|
struct snaparg *sn = arg2;
|
|
|
|
/* The props have already been checked by zfs_check_userprops(). */
|
|
|
|
return (dsl_dataset_snapshot_check(os->os->os_dsl_dataset,
|
|
sn->snapname, tx));
|
|
}
|
|
|
|
static void
|
|
snapshot_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
|
|
{
|
|
objset_t *os = arg1;
|
|
dsl_dataset_t *ds = os->os->os_dsl_dataset;
|
|
struct snaparg *sn = arg2;
|
|
|
|
dsl_dataset_snapshot_sync(ds, sn->snapname, cr, tx);
|
|
|
|
if (sn->props)
|
|
dsl_props_set_sync(ds->ds_prev, sn->props, cr, tx);
|
|
}
|
|
|
|
static int
|
|
dmu_objset_snapshot_one(char *name, void *arg)
|
|
{
|
|
struct snaparg *sn = arg;
|
|
objset_t *os;
|
|
int err;
|
|
|
|
(void) strcpy(sn->failed, name);
|
|
|
|
/*
|
|
* Check permissions only when requested. This only applies when
|
|
* doing a recursive snapshot. The permission checks for the starting
|
|
* dataset have already been performed in zfs_secpolicy_snapshot()
|
|
*/
|
|
if (sn->checkperms == B_TRUE &&
|
|
(err = zfs_secpolicy_snapshot_perms(name, CRED())))
|
|
return (err);
|
|
|
|
err = dmu_objset_open(name, DMU_OST_ANY, DS_MODE_USER, &os);
|
|
if (err != 0)
|
|
return (err);
|
|
|
|
/* If the objset is in an inconsistent state, return busy */
|
|
if (os->os->os_dsl_dataset->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) {
|
|
dmu_objset_close(os);
|
|
return (EBUSY);
|
|
}
|
|
|
|
/*
|
|
* NB: we need to wait for all in-flight changes to get to disk,
|
|
* so that we snapshot those changes. zil_suspend does this as
|
|
* a side effect.
|
|
*/
|
|
err = zil_suspend(dmu_objset_zil(os));
|
|
if (err == 0) {
|
|
dsl_sync_task_create(sn->dstg, snapshot_check,
|
|
snapshot_sync, os, sn, 3);
|
|
} else {
|
|
dmu_objset_close(os);
|
|
}
|
|
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
dmu_objset_snapshot(char *fsname, char *snapname,
|
|
nvlist_t *props, boolean_t recursive)
|
|
{
|
|
dsl_sync_task_t *dst;
|
|
struct snaparg *sn;
|
|
spa_t *spa;
|
|
int err;
|
|
|
|
sn = kmem_alloc(sizeof (struct snaparg), KM_SLEEP);
|
|
(void) strcpy(sn->failed, fsname);
|
|
|
|
err = spa_open(fsname, &spa, FTAG);
|
|
if (err) {
|
|
kmem_free(sn, sizeof (struct snaparg));
|
|
return (err);
|
|
}
|
|
|
|
sn->dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
|
|
sn->snapname = snapname;
|
|
sn->props = props;
|
|
|
|
if (recursive) {
|
|
sn->checkperms = B_TRUE;
|
|
err = dmu_objset_find(fsname,
|
|
dmu_objset_snapshot_one, sn, DS_FIND_CHILDREN);
|
|
} else {
|
|
sn->checkperms = B_FALSE;
|
|
err = dmu_objset_snapshot_one(fsname, sn);
|
|
}
|
|
|
|
if (err == 0)
|
|
err = dsl_sync_task_group_wait(sn->dstg);
|
|
|
|
for (dst = list_head(&sn->dstg->dstg_tasks); dst;
|
|
dst = list_next(&sn->dstg->dstg_tasks, dst)) {
|
|
objset_t *os = dst->dst_arg1;
|
|
dsl_dataset_t *ds = os->os->os_dsl_dataset;
|
|
if (dst->dst_err)
|
|
dsl_dataset_name(ds, sn->failed);
|
|
zil_resume(dmu_objset_zil(os));
|
|
dmu_objset_close(os);
|
|
}
|
|
|
|
if (err)
|
|
(void) strcpy(fsname, sn->failed);
|
|
dsl_sync_task_group_destroy(sn->dstg);
|
|
spa_close(spa, FTAG);
|
|
kmem_free(sn, sizeof (struct snaparg));
|
|
return (err);
|
|
}
|
|
|
|
static void
|
|
dmu_objset_sync_dnodes(list_t *list, list_t *newlist, dmu_tx_t *tx)
|
|
{
|
|
dnode_t *dn;
|
|
|
|
while ((dn = list_head(list))) {
|
|
ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
|
|
ASSERT(dn->dn_dbuf->db_data_pending);
|
|
/*
|
|
* Initialize dn_zio outside dnode_sync() because the
|
|
* meta-dnode needs to set it ouside dnode_sync().
|
|
*/
|
|
dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio;
|
|
ASSERT(dn->dn_zio);
|
|
|
|
ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS);
|
|
list_remove(list, dn);
|
|
|
|
if (newlist) {
|
|
(void) dnode_add_ref(dn, newlist);
|
|
list_insert_tail(newlist, dn);
|
|
}
|
|
|
|
dnode_sync(dn, tx);
|
|
}
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
ready(zio_t *zio, arc_buf_t *abuf, void *arg)
|
|
{
|
|
int i;
|
|
|
|
blkptr_t *bp = zio->io_bp;
|
|
objset_impl_t *os = arg;
|
|
dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
|
|
ASSERTV(blkptr_t *bp_orig = &zio->io_bp_orig);
|
|
|
|
ASSERT(bp == os->os_rootbp);
|
|
ASSERT(BP_GET_TYPE(bp) == DMU_OT_OBJSET);
|
|
ASSERT(BP_GET_LEVEL(bp) == 0);
|
|
|
|
/*
|
|
* Update rootbp fill count: it should be the number of objects
|
|
* allocated in the object set (not counting the "special"
|
|
* objects that are stored in the objset_phys_t -- the meta
|
|
* dnode and user/group accounting objects).
|
|
*/
|
|
bp->blk_fill = 0;
|
|
for (i = 0; i < dnp->dn_nblkptr; i++)
|
|
bp->blk_fill += dnp->dn_blkptr[i].blk_fill;
|
|
|
|
if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
|
|
ASSERT(DVA_EQUAL(BP_IDENTITY(bp), BP_IDENTITY(bp_orig)));
|
|
} else {
|
|
if (zio->io_bp_orig.blk_birth == os->os_synctx->tx_txg)
|
|
(void) dsl_dataset_block_kill(os->os_dsl_dataset,
|
|
&zio->io_bp_orig, zio, os->os_synctx);
|
|
dsl_dataset_block_born(os->os_dsl_dataset, bp, os->os_synctx);
|
|
}
|
|
}
|
|
|
|
/* called from dsl */
|
|
void
|
|
dmu_objset_sync(objset_impl_t *os, zio_t *pio, dmu_tx_t *tx)
|
|
{
|
|
int txgoff;
|
|
zbookmark_t zb;
|
|
writeprops_t wp = { 0 };
|
|
zio_t *zio;
|
|
list_t *list;
|
|
list_t *newlist = NULL;
|
|
dbuf_dirty_record_t *dr;
|
|
|
|
dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg);
|
|
|
|
ASSERT(dmu_tx_is_syncing(tx));
|
|
/* XXX the write_done callback should really give us the tx... */
|
|
os->os_synctx = tx;
|
|
|
|
if (os->os_dsl_dataset == NULL) {
|
|
/*
|
|
* This is the MOS. If we have upgraded,
|
|
* spa_max_replication() could change, so reset
|
|
* os_copies here.
|
|
*/
|
|
os->os_copies = spa_max_replication(os->os_spa);
|
|
}
|
|
|
|
/*
|
|
* Create the root block IO
|
|
*/
|
|
zb.zb_objset = os->os_dsl_dataset ? os->os_dsl_dataset->ds_object : 0;
|
|
zb.zb_object = 0;
|
|
zb.zb_level = -1; /* for block ordering; it's level 0 on disk */
|
|
zb.zb_blkid = 0;
|
|
|
|
wp.wp_type = DMU_OT_OBJSET;
|
|
wp.wp_level = 0; /* on-disk BP level; see above */
|
|
wp.wp_copies = os->os_copies;
|
|
wp.wp_oschecksum = os->os_checksum;
|
|
wp.wp_oscompress = os->os_compress;
|
|
|
|
if (BP_IS_OLDER(os->os_rootbp, tx->tx_txg)) {
|
|
(void) dsl_dataset_block_kill(os->os_dsl_dataset,
|
|
os->os_rootbp, pio, tx);
|
|
}
|
|
|
|
arc_release(os->os_phys_buf, &os->os_phys_buf);
|
|
|
|
zio = arc_write(pio, os->os_spa, &wp, DMU_OS_IS_L2CACHEABLE(os),
|
|
tx->tx_txg, os->os_rootbp, os->os_phys_buf, ready, NULL, os,
|
|
ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
|
|
|
|
/*
|
|
* Sync special dnodes - the parent IO for the sync is the root block
|
|
*/
|
|
os->os_meta_dnode->dn_zio = zio;
|
|
dnode_sync(os->os_meta_dnode, tx);
|
|
|
|
os->os_phys->os_flags = os->os_flags;
|
|
|
|
if (os->os_userused_dnode &&
|
|
os->os_userused_dnode->dn_type != DMU_OT_NONE) {
|
|
os->os_userused_dnode->dn_zio = zio;
|
|
dnode_sync(os->os_userused_dnode, tx);
|
|
os->os_groupused_dnode->dn_zio = zio;
|
|
dnode_sync(os->os_groupused_dnode, tx);
|
|
}
|
|
|
|
txgoff = tx->tx_txg & TXG_MASK;
|
|
|
|
if (dmu_objset_userused_enabled(os)) {
|
|
newlist = &os->os_synced_dnodes;
|
|
/*
|
|
* We must create the list here because it uses the
|
|
* dn_dirty_link[] of this txg.
|
|
*/
|
|
list_create(newlist, sizeof (dnode_t),
|
|
offsetof(dnode_t, dn_dirty_link[txgoff]));
|
|
}
|
|
|
|
dmu_objset_sync_dnodes(&os->os_free_dnodes[txgoff], newlist, tx);
|
|
dmu_objset_sync_dnodes(&os->os_dirty_dnodes[txgoff], newlist, tx);
|
|
|
|
list = &os->os_meta_dnode->dn_dirty_records[txgoff];
|
|
while ((dr = list_head(list))) {
|
|
ASSERT(dr->dr_dbuf->db_level == 0);
|
|
list_remove(list, dr);
|
|
if (dr->dr_zio)
|
|
zio_nowait(dr->dr_zio);
|
|
}
|
|
/*
|
|
* Free intent log blocks up to this tx.
|
|
*/
|
|
zil_sync(os->os_zil, tx);
|
|
os->os_phys->os_zil_header = os->os_zil_header;
|
|
zio_nowait(zio);
|
|
}
|
|
|
|
static objset_used_cb_t *used_cbs[DMU_OST_NUMTYPES];
|
|
|
|
void
|
|
dmu_objset_register_type(dmu_objset_type_t ost, objset_used_cb_t *cb)
|
|
{
|
|
used_cbs[ost] = cb;
|
|
}
|
|
|
|
boolean_t
|
|
dmu_objset_userused_enabled(objset_impl_t *os)
|
|
{
|
|
return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE &&
|
|
used_cbs[os->os_phys->os_type] &&
|
|
os->os_userused_dnode);
|
|
}
|
|
|
|
void
|
|
dmu_objset_do_userquota_callbacks(objset_impl_t *os, dmu_tx_t *tx)
|
|
{
|
|
dnode_t *dn;
|
|
list_t *list = &os->os_synced_dnodes;
|
|
ASSERTV(static const char zerobuf[DN_MAX_BONUSLEN] = {0});
|
|
|
|
ASSERT(list_head(list) == NULL || dmu_objset_userused_enabled(os));
|
|
|
|
while ((dn = list_head(list))) {
|
|
dmu_object_type_t bonustype;
|
|
|
|
ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object));
|
|
ASSERT(dn->dn_oldphys);
|
|
ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE ||
|
|
dn->dn_phys->dn_flags &
|
|
DNODE_FLAG_USERUSED_ACCOUNTED);
|
|
|
|
/* Allocate the user/groupused objects if necessary. */
|
|
if (os->os_userused_dnode->dn_type == DMU_OT_NONE) {
|
|
VERIFY(0 == zap_create_claim(&os->os,
|
|
DMU_USERUSED_OBJECT,
|
|
DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
|
|
VERIFY(0 == zap_create_claim(&os->os,
|
|
DMU_GROUPUSED_OBJECT,
|
|
DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
|
|
}
|
|
|
|
/*
|
|
* If the object was not previously
|
|
* accounted, pretend that it was free.
|
|
*/
|
|
if (!(dn->dn_oldphys->dn_flags &
|
|
DNODE_FLAG_USERUSED_ACCOUNTED)) {
|
|
bzero(dn->dn_oldphys, sizeof (dnode_phys_t));
|
|
}
|
|
|
|
/*
|
|
* If the object was freed, use the previous bonustype.
|
|
*/
|
|
bonustype = dn->dn_phys->dn_bonustype ?
|
|
dn->dn_phys->dn_bonustype : dn->dn_oldphys->dn_bonustype;
|
|
ASSERT(dn->dn_phys->dn_type != 0 ||
|
|
(bcmp(DN_BONUS(dn->dn_phys), zerobuf,
|
|
DN_MAX_BONUSLEN) == 0 &&
|
|
DN_USED_BYTES(dn->dn_phys) == 0));
|
|
ASSERT(dn->dn_oldphys->dn_type != 0 ||
|
|
(bcmp(DN_BONUS(dn->dn_oldphys), zerobuf,
|
|
DN_MAX_BONUSLEN) == 0 &&
|
|
DN_USED_BYTES(dn->dn_oldphys) == 0));
|
|
used_cbs[os->os_phys->os_type](&os->os, bonustype,
|
|
DN_BONUS(dn->dn_oldphys), DN_BONUS(dn->dn_phys),
|
|
DN_USED_BYTES(dn->dn_oldphys),
|
|
DN_USED_BYTES(dn->dn_phys), tx);
|
|
|
|
/*
|
|
* The mutex is needed here for interlock with dnode_allocate.
|
|
*/
|
|
mutex_enter(&dn->dn_mtx);
|
|
zio_buf_free(dn->dn_oldphys, sizeof (dnode_phys_t));
|
|
dn->dn_oldphys = NULL;
|
|
mutex_exit(&dn->dn_mtx);
|
|
|
|
list_remove(list, dn);
|
|
dnode_rele(dn, list);
|
|
}
|
|
}
|
|
|
|
boolean_t
|
|
dmu_objset_userspace_present(objset_t *os)
|
|
{
|
|
return (os->os->os_phys->os_flags &
|
|
OBJSET_FLAG_USERACCOUNTING_COMPLETE);
|
|
}
|
|
|
|
int
|
|
dmu_objset_userspace_upgrade(objset_t *os)
|
|
{
|
|
uint64_t obj;
|
|
int err = 0;
|
|
|
|
if (dmu_objset_userspace_present(os))
|
|
return (0);
|
|
if (!dmu_objset_userused_enabled(os->os))
|
|
return (ENOTSUP);
|
|
if (dmu_objset_is_snapshot(os))
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* We simply need to mark every object dirty, so that it will be
|
|
* synced out and now accounted. If this is called
|
|
* concurrently, or if we already did some work before crashing,
|
|
* that's fine, since we track each object's accounted state
|
|
* independently.
|
|
*/
|
|
|
|
for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) {
|
|
dmu_tx_t *tx = dmu_tx_create(os);
|
|
dmu_buf_t *db;
|
|
int objerr;
|
|
|
|
if (issig(JUSTLOOKING) && issig(FORREAL))
|
|
return (EINTR);
|
|
|
|
objerr = dmu_bonus_hold(os, obj, FTAG, &db);
|
|
if (objerr)
|
|
continue;
|
|
dmu_tx_hold_bonus(tx, obj);
|
|
objerr = dmu_tx_assign(tx, TXG_WAIT);
|
|
if (objerr) {
|
|
dmu_tx_abort(tx);
|
|
continue;
|
|
}
|
|
dmu_buf_will_dirty(db, tx);
|
|
dmu_buf_rele(db, FTAG);
|
|
dmu_tx_commit(tx);
|
|
}
|
|
|
|
os->os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
|
|
txg_wait_synced(dmu_objset_pool(os), 0);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
|
|
uint64_t *usedobjsp, uint64_t *availobjsp)
|
|
{
|
|
dsl_dataset_space(os->os->os_dsl_dataset, refdbytesp, availbytesp,
|
|
usedobjsp, availobjsp);
|
|
}
|
|
|
|
uint64_t
|
|
dmu_objset_fsid_guid(objset_t *os)
|
|
{
|
|
return (dsl_dataset_fsid_guid(os->os->os_dsl_dataset));
|
|
}
|
|
|
|
void
|
|
dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *st)
|
|
{
|
|
st->dds_type = os->os->os_phys->os_type;
|
|
if (os->os->os_dsl_dataset)
|
|
dsl_dataset_fast_stat(os->os->os_dsl_dataset, st);
|
|
}
|
|
|
|
void
|
|
dmu_objset_stats(objset_t *os, nvlist_t *nv)
|
|
{
|
|
ASSERT(os->os->os_dsl_dataset ||
|
|
os->os->os_phys->os_type == DMU_OST_META);
|
|
|
|
if (os->os->os_dsl_dataset != NULL)
|
|
dsl_dataset_stats(os->os->os_dsl_dataset, nv);
|
|
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE,
|
|
os->os->os_phys->os_type);
|
|
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING,
|
|
dmu_objset_userspace_present(os));
|
|
}
|
|
|
|
int
|
|
dmu_objset_is_snapshot(objset_t *os)
|
|
{
|
|
if (os->os->os_dsl_dataset != NULL)
|
|
return (dsl_dataset_is_snapshot(os->os->os_dsl_dataset));
|
|
else
|
|
return (B_FALSE);
|
|
}
|
|
|
|
int
|
|
dmu_snapshot_realname(objset_t *os, char *name, char *real, int maxlen,
|
|
boolean_t *conflict)
|
|
{
|
|
dsl_dataset_t *ds = os->os->os_dsl_dataset;
|
|
uint64_t ignored;
|
|
|
|
if (ds->ds_phys->ds_snapnames_zapobj == 0)
|
|
return (ENOENT);
|
|
|
|
return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset,
|
|
ds->ds_phys->ds_snapnames_zapobj, name, 8, 1, &ignored, MT_FIRST,
|
|
real, maxlen, conflict));
|
|
}
|
|
|
|
int
|
|
dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
|
|
uint64_t *idp, uint64_t *offp, boolean_t *case_conflict)
|
|
{
|
|
dsl_dataset_t *ds = os->os->os_dsl_dataset;
|
|
zap_cursor_t cursor;
|
|
zap_attribute_t attr;
|
|
|
|
if (ds->ds_phys->ds_snapnames_zapobj == 0)
|
|
return (ENOENT);
|
|
|
|
zap_cursor_init_serialized(&cursor,
|
|
ds->ds_dir->dd_pool->dp_meta_objset,
|
|
ds->ds_phys->ds_snapnames_zapobj, *offp);
|
|
|
|
if (zap_cursor_retrieve(&cursor, &attr) != 0) {
|
|
zap_cursor_fini(&cursor);
|
|
return (ENOENT);
|
|
}
|
|
|
|
if (strlen(attr.za_name) + 1 > namelen) {
|
|
zap_cursor_fini(&cursor);
|
|
return (ENAMETOOLONG);
|
|
}
|
|
|
|
(void) strcpy(name, attr.za_name);
|
|
if (idp)
|
|
*idp = attr.za_first_integer;
|
|
if (case_conflict)
|
|
*case_conflict = attr.za_normalization_conflict;
|
|
zap_cursor_advance(&cursor);
|
|
*offp = zap_cursor_serialize(&cursor);
|
|
zap_cursor_fini(&cursor);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
dmu_dir_list_next(objset_t *os, int namelen, char *name,
|
|
uint64_t *idp, uint64_t *offp)
|
|
{
|
|
dsl_dir_t *dd = os->os->os_dsl_dataset->ds_dir;
|
|
zap_cursor_t cursor;
|
|
zap_attribute_t attr;
|
|
|
|
/* there is no next dir on a snapshot! */
|
|
if (os->os->os_dsl_dataset->ds_object !=
|
|
dd->dd_phys->dd_head_dataset_obj)
|
|
return (ENOENT);
|
|
|
|
zap_cursor_init_serialized(&cursor,
|
|
dd->dd_pool->dp_meta_objset,
|
|
dd->dd_phys->dd_child_dir_zapobj, *offp);
|
|
|
|
if (zap_cursor_retrieve(&cursor, &attr) != 0) {
|
|
zap_cursor_fini(&cursor);
|
|
return (ENOENT);
|
|
}
|
|
|
|
if (strlen(attr.za_name) + 1 > namelen) {
|
|
zap_cursor_fini(&cursor);
|
|
return (ENAMETOOLONG);
|
|
}
|
|
|
|
(void) strcpy(name, attr.za_name);
|
|
if (idp)
|
|
*idp = attr.za_first_integer;
|
|
zap_cursor_advance(&cursor);
|
|
*offp = zap_cursor_serialize(&cursor);
|
|
zap_cursor_fini(&cursor);
|
|
|
|
return (0);
|
|
}
|
|
|
|
struct findarg {
|
|
int (*func)(char *, void *);
|
|
void *arg;
|
|
};
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
findfunc(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
|
|
{
|
|
struct findarg *fa = arg;
|
|
return (fa->func((char *)dsname, fa->arg));
|
|
}
|
|
|
|
/*
|
|
* Find all objsets under name, and for each, call 'func(child_name, arg)'.
|
|
* Perhaps change all callers to use dmu_objset_find_spa()?
|
|
*/
|
|
int
|
|
dmu_objset_find(char *name, int func(char *, void *), void *arg, int flags)
|
|
{
|
|
struct findarg fa;
|
|
fa.func = func;
|
|
fa.arg = arg;
|
|
return (dmu_objset_find_spa(NULL, name, findfunc, &fa, flags));
|
|
}
|
|
|
|
/*
|
|
* Find all objsets under name, call func on each
|
|
*/
|
|
int
|
|
dmu_objset_find_spa(spa_t *spa, const char *name,
|
|
int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags)
|
|
{
|
|
dsl_dir_t *dd;
|
|
dsl_pool_t *dp;
|
|
dsl_dataset_t *ds;
|
|
zap_cursor_t zc;
|
|
zap_attribute_t *attr;
|
|
char *child;
|
|
uint64_t thisobj;
|
|
int err;
|
|
|
|
if (name == NULL)
|
|
name = spa_name(spa);
|
|
err = dsl_dir_open_spa(spa, name, FTAG, &dd, NULL);
|
|
if (err)
|
|
return (err);
|
|
|
|
/* Don't visit hidden ($MOS & $ORIGIN) objsets. */
|
|
if (dd->dd_myname[0] == '$') {
|
|
dsl_dir_close(dd, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
thisobj = dd->dd_phys->dd_head_dataset_obj;
|
|
attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
|
|
dp = dd->dd_pool;
|
|
|
|
/*
|
|
* Iterate over all children.
|
|
*/
|
|
if (flags & DS_FIND_CHILDREN) {
|
|
for (zap_cursor_init(&zc, dp->dp_meta_objset,
|
|
dd->dd_phys->dd_child_dir_zapobj);
|
|
zap_cursor_retrieve(&zc, attr) == 0;
|
|
(void) zap_cursor_advance(&zc)) {
|
|
ASSERT(attr->za_integer_length == sizeof (uint64_t));
|
|
ASSERT(attr->za_num_integers == 1);
|
|
|
|
child = kmem_alloc(MAXPATHLEN, KM_SLEEP);
|
|
(void) strcpy(child, name);
|
|
(void) strcat(child, "/");
|
|
(void) strcat(child, attr->za_name);
|
|
err = dmu_objset_find_spa(spa, child, func, arg, flags);
|
|
kmem_free(child, MAXPATHLEN);
|
|
if (err)
|
|
break;
|
|
}
|
|
zap_cursor_fini(&zc);
|
|
|
|
if (err) {
|
|
dsl_dir_close(dd, FTAG);
|
|
kmem_free(attr, sizeof (zap_attribute_t));
|
|
return (err);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Iterate over all snapshots.
|
|
*/
|
|
if (flags & DS_FIND_SNAPSHOTS) {
|
|
if (!dsl_pool_sync_context(dp))
|
|
rw_enter(&dp->dp_config_rwlock, RW_READER);
|
|
err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
|
|
if (!dsl_pool_sync_context(dp))
|
|
rw_exit(&dp->dp_config_rwlock);
|
|
|
|
if (err == 0) {
|
|
uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj;
|
|
dsl_dataset_rele(ds, FTAG);
|
|
|
|
for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
|
|
zap_cursor_retrieve(&zc, attr) == 0;
|
|
(void) zap_cursor_advance(&zc)) {
|
|
ASSERT(attr->za_integer_length ==
|
|
sizeof (uint64_t));
|
|
ASSERT(attr->za_num_integers == 1);
|
|
|
|
child = kmem_alloc(MAXPATHLEN, KM_SLEEP);
|
|
(void) strcpy(child, name);
|
|
(void) strcat(child, "@");
|
|
(void) strcat(child, attr->za_name);
|
|
err = func(spa, attr->za_first_integer,
|
|
child, arg);
|
|
kmem_free(child, MAXPATHLEN);
|
|
if (err)
|
|
break;
|
|
}
|
|
zap_cursor_fini(&zc);
|
|
}
|
|
}
|
|
|
|
dsl_dir_close(dd, FTAG);
|
|
kmem_free(attr, sizeof (zap_attribute_t));
|
|
|
|
if (err)
|
|
return (err);
|
|
|
|
/*
|
|
* Apply to self if appropriate.
|
|
*/
|
|
err = func(spa, thisobj, name, arg);
|
|
return (err);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
dmu_objset_prefetch(char *name, void *arg)
|
|
{
|
|
dsl_dataset_t *ds;
|
|
|
|
if (dsl_dataset_hold(name, FTAG, &ds))
|
|
return (0);
|
|
|
|
if (!BP_IS_HOLE(&ds->ds_phys->ds_bp)) {
|
|
mutex_enter(&ds->ds_opening_lock);
|
|
if (!dsl_dataset_get_user_ptr(ds)) {
|
|
uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH;
|
|
zbookmark_t zb;
|
|
|
|
zb.zb_objset = ds->ds_object;
|
|
zb.zb_object = 0;
|
|
zb.zb_level = -1;
|
|
zb.zb_blkid = 0;
|
|
|
|
(void) arc_read_nolock(NULL, dsl_dataset_get_spa(ds),
|
|
&ds->ds_phys->ds_bp, NULL, NULL,
|
|
ZIO_PRIORITY_ASYNC_READ,
|
|
ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
|
|
&aflags, &zb);
|
|
}
|
|
mutex_exit(&ds->ds_opening_lock);
|
|
}
|
|
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
dmu_objset_set_user(objset_t *os, void *user_ptr)
|
|
{
|
|
ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock));
|
|
os->os->os_user_ptr = user_ptr;
|
|
}
|
|
|
|
void *
|
|
dmu_objset_get_user(objset_t *os)
|
|
{
|
|
ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock));
|
|
return (os->os->os_user_ptr);
|
|
}
|