illumos/illumos-gate: usr/src/uts/common/fs/zfs/dsl

annotate usr/src/uts/common/fs/zfs/dsl_userhold.c @ 14060:aeb4e8fef072

3829 fix for 3740 changed behavior of zfs destroy/hold/release ioctl Reviewed by: Matt Amdur <matt.amdur@delphix.com> Reviewed by: Christopher Siden <christopher.siden@delphix.com> Approved by: Richard Lowe <richlowe@richlowe.net>

author	Matthew Ahrens <mahrens@delphix.com>
date	Thu, 20 Jun 2013 14:43:17 -0800
parents	1a272fe1337b
children

rev	line source
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	1 /*
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	2 * CDDL HEADER START
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	3 *
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	4 * The contents of this file are subject to the terms of the
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	5 * Common Development and Distribution License (the "License").
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	6 * You may not use this file except in compliance with the License.
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	7 *
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	9 * or http://www.opensolaris.org/os/licensing.
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	10 * See the License for the specific language governing permissions
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	11 * and limitations under the License.
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	12 *
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	13 * When distributing Covered Code, include this CDDL HEADER in each
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	15 * If applicable, add the following below this CDDL HEADER, with the
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	16 * fields enclosed by brackets "[]" replaced with your own identifying
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	17 * information: Portions Copyright [yyyy] [name of copyright owner]
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	18 *
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	19 * CDDL HEADER END
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	20 */
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	21 /*
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
13980 d7059eb1884c 3598 want to dtrace when errors are generated in zfs Matthew Ahrens <mahrens@delphix.com> parents: 13973 diff changeset	23 * Copyright (c) 2013 by Delphix. All rights reserved.
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	24 * Copyright (c) 2013 Steven Hartland. All rights reserved.
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	25 */
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	26
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	27 #include <sys/zfs_context.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	28 #include <sys/dsl_userhold.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	29 #include <sys/dsl_dataset.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	30 #include <sys/dsl_destroy.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	31 #include <sys/dsl_synctask.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	32 #include <sys/dmu_tx.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	33 #include <sys/zfs_onexit.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	34 #include <sys/dsl_pool.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	35 #include <sys/dsl_dir.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	36 #include <sys/zfs_ioctl.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	37 #include <sys/zap.h>
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	38
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	39 typedef struct dsl_dataset_user_hold_arg {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	40 nvlist_t *dduha_holds;
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	41 nvlist_t *dduha_chkholds;
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	42 nvlist_t *dduha_errlist;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	43 minor_t dduha_minor;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	44 } dsl_dataset_user_hold_arg_t;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	45
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	46 /*
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	47 * If you add new checks here, you may need to add additional checks to the
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	48 * "temporary" case in snapshot_check() in dmu_objset.c.
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	49 */
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	50 int
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	51 dsl_dataset_user_hold_check_one(dsl_dataset_t ds, const char htag,
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	52 boolean_t temphold, dmu_tx_t *tx)
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	53 {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	54 dsl_pool_t *dp = dmu_tx_pool(tx);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	55 objset_t *mos = dp->dp_meta_objset;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	56 int error = 0;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	57
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	58 ASSERT(dsl_pool_config_held(dp));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	59
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	60 if (strlen(htag) > MAXNAMELEN)
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	61 return (SET_ERROR(E2BIG));
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	62 /* Tempholds have a more restricted length */
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	63 if (temphold && strlen(htag) + MAX_TAG_PREFIX_LEN >= MAXNAMELEN)
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	64 return (SET_ERROR(E2BIG));
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	65
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	66 /* tags must be unique (if ds already exists) */
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	67 if (ds != NULL && ds->ds_phys->ds_userrefs_obj != 0) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	68 uint64_t value;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	69
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	70 error = zap_lookup(mos, ds->ds_phys->ds_userrefs_obj,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	71 htag, 8, 1, &value);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	72 if (error == 0)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	73 error = SET_ERROR(EEXIST);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	74 else if (error == ENOENT)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	75 error = 0;
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	76 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	77
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	78 return (error);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	79 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	80
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	81 static int
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	82 dsl_dataset_user_hold_check(void arg, dmu_tx_t tx)
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	83 {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	84 dsl_dataset_user_hold_arg_t *dduha = arg;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	85 dsl_pool_t *dp = dmu_tx_pool(tx);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	86
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	87 if (spa_version(dp->dp_spa) < SPA_VERSION_USERREFS)
13980 d7059eb1884c 3598 want to dtrace when errors are generated in zfs Matthew Ahrens <mahrens@delphix.com> parents: 13973 diff changeset	88 return (SET_ERROR(ENOTSUP));
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	89
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	90 if (!dmu_tx_is_syncing(tx))
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	91 return (0);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	92
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	93 for (nvpair_t *pair = nvlist_next_nvpair(dduha->dduha_holds, NULL);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	94 pair != NULL; pair = nvlist_next_nvpair(dduha->dduha_holds, pair)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	95 dsl_dataset_t *ds;
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	96 int error = 0;
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	97 char htag, name;
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	98
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	99 /* must be a snapshot */
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	100 name = nvpair_name(pair);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	101 if (strchr(name, '@') == NULL)
13980 d7059eb1884c 3598 want to dtrace when errors are generated in zfs Matthew Ahrens <mahrens@delphix.com> parents: 13973 diff changeset	102 error = SET_ERROR(EINVAL);
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	103
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	104 if (error == 0)
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	105 error = nvpair_value_string(pair, &htag);
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	106
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	107 if (error == 0)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	108 error = dsl_dataset_hold(dp, name, FTAG, &ds);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	109
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	110 if (error == 0) {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	111 error = dsl_dataset_user_hold_check_one(ds, htag,
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	112 dduha->dduha_minor != 0, tx);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	113 dsl_dataset_rele(ds, FTAG);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	114 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	115
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	116 if (error == 0) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	117 fnvlist_add_string(dduha->dduha_chkholds, name, htag);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	118 } else {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	119 /*
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	120 * We register ENOENT errors so they can be correctly
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	121 * reported if needed, such as when all holds fail.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	122 */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	123 fnvlist_add_int32(dduha->dduha_errlist, name, error);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	124 if (error != ENOENT)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	125 return (error);
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	126 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	127 }
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	128
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	129 return (0);
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	130 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	131
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	132
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	133 static void
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	134 dsl_dataset_user_hold_sync_one_impl(nvlist_t tmpholds, dsl_dataset_t ds,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	135 const char htag, minor_t minor, uint64_t now, dmu_tx_t tx)
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	136 {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	137 dsl_pool_t *dp = ds->ds_dir->dd_pool;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	138 objset_t *mos = dp->dp_meta_objset;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	139 uint64_t zapobj;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	140
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	141 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	142
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	143 if (ds->ds_phys->ds_userrefs_obj == 0) {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	144 /*
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	145 * This is the first user hold for this dataset. Create
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	146 * the userrefs zap object.
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	147 */
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	148 dmu_buf_will_dirty(ds->ds_dbuf, tx);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	149 zapobj = ds->ds_phys->ds_userrefs_obj =
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	150 zap_create(mos, DMU_OT_USERREFS, DMU_OT_NONE, 0, tx);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	151 } else {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	152 zapobj = ds->ds_phys->ds_userrefs_obj;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	153 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	154 ds->ds_userrefs++;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	155
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	156 VERIFY0(zap_add(mos, zapobj, htag, 8, 1, &now, tx));
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	157
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	158 if (minor != 0) {
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	159 char name[MAXNAMELEN];
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	160 nvlist_t *tags;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	161
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	162 VERIFY0(dsl_pool_user_hold(dp, ds->ds_object,
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	163 htag, now, tx));
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	164 (void) snprintf(name, sizeof (name), "%llx",
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	165 (u_longlong_t)ds->ds_object);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	166
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	167 if (nvlist_lookup_nvlist(tmpholds, name, &tags) != 0) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	168 tags = fnvlist_alloc();
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	169 fnvlist_add_boolean(tags, htag);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	170 fnvlist_add_nvlist(tmpholds, name, tags);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	171 fnvlist_free(tags);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	172 } else {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	173 fnvlist_add_boolean(tags, htag);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	174 }
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	175 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	176
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	177 spa_history_log_internal_ds(ds, "hold", tx,
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	178 "tag=%s temp=%d refs=%llu",
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	179 htag, minor != 0, ds->ds_userrefs);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	180 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	181
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	182 typedef struct zfs_hold_cleanup_arg {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	183 char zhca_spaname[MAXNAMELEN];
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	184 uint64_t zhca_spa_load_guid;
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	185 nvlist_t *zhca_holds;
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	186 } zfs_hold_cleanup_arg_t;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	187
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	188 static void
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	189 dsl_dataset_user_release_onexit(void *arg)
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	190 {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	191 zfs_hold_cleanup_arg_t *ca = arg;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	192 spa_t *spa;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	193 int error;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	194
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	195 error = spa_open(ca->zhca_spaname, &spa, FTAG);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	196 if (error != 0) {
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	197 zfs_dbgmsg("couldn't release holds on pool=%s "
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	198 "because pool is no longer loaded",
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	199 ca->zhca_spaname);
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	200 return;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	201 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	202 if (spa_load_guid(spa) != ca->zhca_spa_load_guid) {
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	203 zfs_dbgmsg("couldn't release holds on pool=%s "
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	204 "because pool is no longer loaded (guid doesn't match)",
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	205 ca->zhca_spaname);
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	206 spa_close(spa, FTAG);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	207 return;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	208 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	209
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	210 (void) dsl_dataset_user_release_tmp(spa_get_dsl(spa), ca->zhca_holds);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	211 fnvlist_free(ca->zhca_holds);
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	212 kmem_free(ca, sizeof (zfs_hold_cleanup_arg_t));
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	213 spa_close(spa, FTAG);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	214 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	215
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	216 static void
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	217 dsl_onexit_hold_cleanup(spa_t spa, nvlist_t holds, minor_t minor)
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	218 {
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	219 zfs_hold_cleanup_arg_t *ca;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	220
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	221 if (minor == 0 \|\| nvlist_empty(holds)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	222 fnvlist_free(holds);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	223 return;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	224 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	225
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	226 ASSERT(spa != NULL);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	227 ca = kmem_alloc(sizeof (*ca), KM_SLEEP);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	228
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	229 (void) strlcpy(ca->zhca_spaname, spa_name(spa),
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	230 sizeof (ca->zhca_spaname));
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	231 ca->zhca_spa_load_guid = spa_load_guid(spa);
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	232 ca->zhca_holds = holds;
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	233 VERIFY0(zfs_onexit_add_cb(minor,
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	234 dsl_dataset_user_release_onexit, ca, NULL));
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	235 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	236
14052 1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	237 void
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	238 dsl_dataset_user_hold_sync_one(dsl_dataset_t ds, const char htag,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	239 minor_t minor, uint64_t now, dmu_tx_t *tx)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	240 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	241 nvlist_t *tmpholds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	242
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	243 if (minor != 0)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	244 tmpholds = fnvlist_alloc();
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	245 else
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	246 tmpholds = NULL;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	247 dsl_dataset_user_hold_sync_one_impl(tmpholds, ds, htag, minor, now, tx);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	248 dsl_onexit_hold_cleanup(dsl_dataset_get_spa(ds), tmpholds, minor);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	249 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	250
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	251 static void
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	252 dsl_dataset_user_hold_sync(void arg, dmu_tx_t tx)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	253 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	254 dsl_dataset_user_hold_arg_t *dduha = arg;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	255 dsl_pool_t *dp = dmu_tx_pool(tx);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	256 nvlist_t *tmpholds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	257 uint64_t now = gethrestime_sec();
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	258
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	259 if (dduha->dduha_minor != 0)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	260 tmpholds = fnvlist_alloc();
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	261 else
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	262 tmpholds = NULL;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	263 for (nvpair_t *pair = nvlist_next_nvpair(dduha->dduha_chkholds, NULL);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	264 pair != NULL;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	265 pair = nvlist_next_nvpair(dduha->dduha_chkholds, pair)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	266 dsl_dataset_t *ds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	267
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	268 VERIFY0(dsl_dataset_hold(dp, nvpair_name(pair), FTAG, &ds));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	269 dsl_dataset_user_hold_sync_one_impl(tmpholds, ds,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	270 fnvpair_value_string(pair), dduha->dduha_minor, now, tx);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	271 dsl_dataset_rele(ds, FTAG);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	272 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	273 dsl_onexit_hold_cleanup(dp->dp_spa, tmpholds, dduha->dduha_minor);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	274 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	275
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	276 /*
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	277 * The full semantics of this function are described in the comment above
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	278 * lzc_hold().
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	279 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	280 * To summarize:
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	281 * holds is nvl of snapname -> holdname
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	282 * errlist will be filled in with snapname -> error
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	283 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	284 * The snaphosts must all be in the same pool.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	285 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	286 * Holds for snapshots that don't exist will be skipped.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	287 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	288 * If none of the snapshots for requested holds exist then ENOENT will be
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	289 * returned.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	290 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	291 * If cleanup_minor is not 0, the holds will be temporary, which will be cleaned
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	292 * up when the process exits.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	293 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	294 * On success all the holds, for snapshots that existed, will be created and 0
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	295 * will be returned.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	296 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	297 * On failure no holds will be created, the errlist will be filled in,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	298 * and an errno will returned.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	299 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	300 * In all cases the errlist will contain entries for holds where the snapshot
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	301 * didn't exist.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	302 */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	303 int
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	304 dsl_dataset_user_hold(nvlist_t holds, minor_t cleanup_minor, nvlist_t errlist)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	305 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	306 dsl_dataset_user_hold_arg_t dduha;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	307 nvpair_t *pair;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	308 int ret;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	309
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	310 pair = nvlist_next_nvpair(holds, NULL);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	311 if (pair == NULL)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	312 return (0);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	313
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	314 dduha.dduha_holds = holds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	315 dduha.dduha_chkholds = fnvlist_alloc();
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	316 dduha.dduha_errlist = errlist;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	317 dduha.dduha_minor = cleanup_minor;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	318
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	319 ret = dsl_sync_task(nvpair_name(pair), dsl_dataset_user_hold_check,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	320 dsl_dataset_user_hold_sync, &dduha, fnvlist_num_pairs(holds));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	321 fnvlist_free(dduha.dduha_chkholds);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	322
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	323 return (ret);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	324 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	325
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	326 typedef int (dsl_holdfunc_t)(dsl_pool_t dp, const char name, void *tag,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	327 dsl_dataset_t **dsp);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	328
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	329 typedef struct dsl_dataset_user_release_arg {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	330 dsl_holdfunc_t *ddura_holdfunc;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	331 nvlist_t *ddura_holds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	332 nvlist_t *ddura_todelete;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	333 nvlist_t *ddura_errlist;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	334 nvlist_t *ddura_chkholds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	335 } dsl_dataset_user_release_arg_t;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	336
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	337 /* Place a dataset hold on the snapshot identified by passed dsobj string */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	338 static int
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	339 dsl_dataset_hold_obj_string(dsl_pool_t dp, const char dsobj, void *tag,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	340 dsl_dataset_t **dsp)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	341 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	342 return (dsl_dataset_hold_obj(dp, strtonum(dsobj, NULL), tag, dsp));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	343 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	344
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	345 static int
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	346 dsl_dataset_user_release_check_one(dsl_dataset_user_release_arg_t *ddura,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	347 dsl_dataset_t ds, nvlist_t holds, const char *snapname)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	348 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	349 uint64_t zapobj;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	350 nvlist_t *holds_found;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	351 objset_t *mos;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	352 int numholds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	353
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	354 if (!dsl_dataset_is_snapshot(ds))
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	355 return (SET_ERROR(EINVAL));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	356
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	357 if (nvlist_empty(holds))
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	358 return (0);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	359
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	360 numholds = 0;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	361 mos = ds->ds_dir->dd_pool->dp_meta_objset;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	362 zapobj = ds->ds_phys->ds_userrefs_obj;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	363 holds_found = fnvlist_alloc();
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	364
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	365 for (nvpair_t *pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	366 pair = nvlist_next_nvpair(holds, pair)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	367 uint64_t tmp;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	368 int error;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	369 const char *holdname = nvpair_name(pair);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	370
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	371 if (zapobj != 0)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	372 error = zap_lookup(mos, zapobj, holdname, 8, 1, &tmp);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	373 else
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	374 error = SET_ERROR(ENOENT);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	375
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	376 /*
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	377 * Non-existent holds are put on the errlist, but don't
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	378 * cause an overall failure.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	379 */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	380 if (error == ENOENT) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	381 if (ddura->ddura_errlist != NULL) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	382 char *errtag = kmem_asprintf("%s#%s",
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	383 snapname, holdname);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	384 fnvlist_add_int32(ddura->ddura_errlist, errtag,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	385 ENOENT);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	386 strfree(errtag);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	387 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	388 continue;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	389 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	390
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	391 if (error != 0) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	392 fnvlist_free(holds_found);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	393 return (error);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	394 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	395
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	396 fnvlist_add_boolean(holds_found, holdname);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	397 numholds++;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	398 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	399
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	400 if (DS_IS_DEFER_DESTROY(ds) && ds->ds_phys->ds_num_children == 1 &&
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	401 ds->ds_userrefs == numholds) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	402 /* we need to destroy the snapshot as well */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	403 if (dsl_dataset_long_held(ds)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	404 fnvlist_free(holds_found);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	405 return (SET_ERROR(EBUSY));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	406 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	407 fnvlist_add_boolean(ddura->ddura_todelete, snapname);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	408 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	409
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	410 if (numholds != 0) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	411 fnvlist_add_nvlist(ddura->ddura_chkholds, snapname,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	412 holds_found);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	413 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	414 fnvlist_free(holds_found);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	415
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	416 return (0);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	417 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	418
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	419 static int
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	420 dsl_dataset_user_release_check(void arg, dmu_tx_t tx)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	421 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	422 dsl_dataset_user_release_arg_t *ddura;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	423 dsl_holdfunc_t *holdfunc;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	424 dsl_pool_t *dp;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	425
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	426 if (!dmu_tx_is_syncing(tx))
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	427 return (0);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	428
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	429 dp = dmu_tx_pool(tx);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	430
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	431 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	432
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	433 ddura = arg;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	434 holdfunc = ddura->ddura_holdfunc;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	435
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	436 for (nvpair_t *pair = nvlist_next_nvpair(ddura->ddura_holds, NULL);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	437 pair != NULL; pair = nvlist_next_nvpair(ddura->ddura_holds, pair)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	438 int error;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	439 dsl_dataset_t *ds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	440 nvlist_t *holds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	441 const char *snapname = nvpair_name(pair);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	442
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	443 error = nvpair_value_nvlist(pair, &holds);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	444 if (error != 0)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	445 error = (SET_ERROR(EINVAL));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	446 else
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	447 error = holdfunc(dp, snapname, FTAG, &ds);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	448 if (error == 0) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	449 error = dsl_dataset_user_release_check_one(ddura, ds,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	450 holds, snapname);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	451 dsl_dataset_rele(ds, FTAG);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	452 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	453 if (error != 0) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	454 if (ddura->ddura_errlist != NULL) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	455 fnvlist_add_int32(ddura->ddura_errlist,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	456 snapname, error);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	457 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	458 /*
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	459 * Non-existent snapshots are put on the errlist,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	460 * but don't cause an overall failure.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	461 */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	462 if (error != ENOENT)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	463 return (error);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	464 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	465 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	466
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	467 return (0);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	468 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	469
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	470 static void
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	471 dsl_dataset_user_release_sync_one(dsl_dataset_t ds, nvlist_t holds,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	472 dmu_tx_t *tx)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	473 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	474 dsl_pool_t *dp = ds->ds_dir->dd_pool;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	475 objset_t *mos = dp->dp_meta_objset;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	476
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	477 for (nvpair_t *pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	478 pair = nvlist_next_nvpair(holds, pair)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	479 int error;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	480 const char *holdname = nvpair_name(pair);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	481
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	482 /* Remove temporary hold if one exists. */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	483 error = dsl_pool_user_release(dp, ds->ds_object, holdname, tx);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	484 VERIFY(error == 0 \|\| error == ENOENT);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	485
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	486 VERIFY0(zap_remove(mos, ds->ds_phys->ds_userrefs_obj, holdname,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	487 tx));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	488 ds->ds_userrefs--;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	489
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	490 spa_history_log_internal_ds(ds, "release", tx,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	491 "tag=%s refs=%lld", holdname, (longlong_t)ds->ds_userrefs);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	492 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	493 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	494
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	495 static void
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	496 dsl_dataset_user_release_sync(void arg, dmu_tx_t tx)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	497 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	498 dsl_dataset_user_release_arg_t *ddura = arg;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	499 dsl_holdfunc_t *holdfunc = ddura->ddura_holdfunc;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	500 dsl_pool_t *dp = dmu_tx_pool(tx);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	501
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	502 ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	503
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	504 for (nvpair_t *pair = nvlist_next_nvpair(ddura->ddura_chkholds, NULL);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	505 pair != NULL; pair = nvlist_next_nvpair(ddura->ddura_chkholds,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	506 pair)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	507 dsl_dataset_t *ds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	508 const char *name = nvpair_name(pair);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	509
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	510 VERIFY0(holdfunc(dp, name, FTAG, &ds));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	511
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	512 dsl_dataset_user_release_sync_one(ds,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	513 fnvpair_value_nvlist(pair), tx);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	514 if (nvlist_exists(ddura->ddura_todelete, name)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	515 ASSERT(ds->ds_userrefs == 0 &&
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	516 ds->ds_phys->ds_num_children == 1 &&
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	517 DS_IS_DEFER_DESTROY(ds));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	518 dsl_destroy_snapshot_sync_impl(ds, B_FALSE, tx);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	519 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	520 dsl_dataset_rele(ds, FTAG);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	521 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	522 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	523
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	524 /*
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	525 * The full semantics of this function are described in the comment above
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	526 * lzc_release().
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	527 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	528 * To summarize:
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	529 * Releases holds specified in the nvl holds.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	530 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	531 * holds is nvl of snapname -> { holdname, ... }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	532 * errlist will be filled in with snapname -> error
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	533 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	534 * If tmpdp is not NULL the names for holds should be the dsobj's of snapshots,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	535 * otherwise they should be the names of shapshots.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	536 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	537 * As a release may cause snapshots to be destroyed this trys to ensure they
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	538 * aren't mounted.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	539 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	540 * The release of non-existent holds are skipped.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	541 *
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	542 * At least one hold must have been released for the this function to succeed
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	543 * and return 0.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	544 */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	545 static int
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	546 dsl_dataset_user_release_impl(nvlist_t holds, nvlist_t errlist,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	547 dsl_pool_t *tmpdp)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	548 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	549 dsl_dataset_user_release_arg_t ddura;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	550 nvpair_t *pair;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	551 char *pool;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	552 int error;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	553
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	554 pair = nvlist_next_nvpair(holds, NULL);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	555 if (pair == NULL)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	556 return (0);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	557
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	558 /*
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	559 * The release may cause snapshots to be destroyed; make sure they
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	560 * are not mounted.
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	561 */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	562 if (tmpdp != NULL) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	563 /* Temporary holds are specified by dsobj string. */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	564 ddura.ddura_holdfunc = dsl_dataset_hold_obj_string;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	565 pool = spa_name(tmpdp->dp_spa);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	566 #ifdef _KERNEL
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	567 dsl_pool_config_enter(tmpdp, FTAG);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	568 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	569 pair = nvlist_next_nvpair(holds, pair)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	570 dsl_dataset_t *ds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	571
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	572 error = dsl_dataset_hold_obj_string(tmpdp,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	573 nvpair_name(pair), FTAG, &ds);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	574 if (error == 0) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	575 char name[MAXNAMELEN];
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	576 dsl_dataset_name(ds, name);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	577 dsl_dataset_rele(ds, FTAG);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	578 (void) zfs_unmount_snap(name);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	579 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	580 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	581 dsl_pool_config_exit(tmpdp, FTAG);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	582 #endif
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	583 } else {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	584 /* Non-temporary holds are specified by name. */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	585 ddura.ddura_holdfunc = dsl_dataset_hold;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	586 pool = nvpair_name(pair);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	587 #ifdef _KERNEL
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	588 for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	589 pair = nvlist_next_nvpair(holds, pair)) {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	590 (void) zfs_unmount_snap(nvpair_name(pair));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	591 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	592 #endif
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	593 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	594
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	595 ddura.ddura_holds = holds;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	596 ddura.ddura_errlist = errlist;
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	597 ddura.ddura_todelete = fnvlist_alloc();
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	598 ddura.ddura_chkholds = fnvlist_alloc();
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	599
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	600 error = dsl_sync_task(pool, dsl_dataset_user_release_check,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	601 dsl_dataset_user_release_sync, &ddura,
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	602 fnvlist_num_pairs(holds));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	603 fnvlist_free(ddura.ddura_todelete);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	604 fnvlist_free(ddura.ddura_chkholds);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	605
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	606 return (error);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	607 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	608
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	609 /*
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	610 * holds is nvl of snapname -> { holdname, ... }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	611 * errlist will be filled in with snapname -> error
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	612 */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	613 int
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	614 dsl_dataset_user_release(nvlist_t holds, nvlist_t errlist)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	615 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	616 return (dsl_dataset_user_release_impl(holds, errlist, NULL));
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	617 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	618
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	619 /*
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	620 * holds is nvl of snapdsobj -> { holdname, ... }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	621 */
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	622 void
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	623 dsl_dataset_user_release_tmp(struct dsl_pool dp, nvlist_t holds)
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	624 {
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	625 ASSERT(dp != NULL);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	626 (void) dsl_dataset_user_release_impl(holds, NULL, dp);
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	627 }
1a272fe1337b 3740 Poor ZFS send / receive performance due to snapshot hold / release processing Steven Hartland <smh@freebsd.org> parents: 14048 diff changeset	628
13973 4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	629 int
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	630 dsl_dataset_get_holds(const char dsname, nvlist_t nvl)
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	631 {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	632 dsl_pool_t *dp;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	633 dsl_dataset_t *ds;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	634 int err;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	635
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	636 err = dsl_pool_hold(dsname, FTAG, &dp);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	637 if (err != 0)
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	638 return (err);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	639 err = dsl_dataset_hold(dp, dsname, FTAG, &ds);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	640 if (err != 0) {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	641 dsl_pool_rele(dp, FTAG);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	642 return (err);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	643 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	644
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	645 if (ds->ds_phys->ds_userrefs_obj != 0) {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	646 zap_attribute_t *za;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	647 zap_cursor_t zc;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	648
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	649 za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	650 for (zap_cursor_init(&zc, ds->ds_dir->dd_pool->dp_meta_objset,
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	651 ds->ds_phys->ds_userrefs_obj);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	652 zap_cursor_retrieve(&zc, za) == 0;
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	653 zap_cursor_advance(&zc)) {
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	654 fnvlist_add_uint64(nvl, za->za_name,
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	655 za->za_first_integer);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	656 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	657 zap_cursor_fini(&zc);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	658 kmem_free(za, sizeof (zap_attribute_t));
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	659 }
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	660 dsl_dataset_rele(ds, FTAG);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	661 dsl_pool_rele(dp, FTAG);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	662 return (0);
4972ab336f54 3464 zfs synctask code needs restructuring Matthew Ahrens <mahrens@delphix.com> parents: diff changeset	663 }

Mercurial > illumos > illumos-gate

annotate usr/src/uts/common/fs/zfs/dsl_userhold.c @ 14060:aeb4e8fef072