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annotate usr/src/uts/common/fs/zfs/sys/dmu_objset.h @ 13743:95aba6e49b9f

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2882 implement libzfs_core 2883 changing "canmount" property to "on" should not always remount dataset 2900 "zfs snapshot" should be able to create multiple, arbitrary snapshots at once Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Chris Siden <christopher.siden@delphix.com> Reviewed by: Garrett D'Amore <garrett@damore.org> Reviewed by: Bill Pijewski <wdp@joyent.com> Reviewed by: Dan Kruchinin <dan.kruchinin@gmail.com> Approved by: Eric Schrock <Eric.Schrock@delphix.com>
author Matthew Ahrens <mahrens@delphix.com>
date Sat, 30 Jun 2012 13:00:47 -0700
parents 8c712bbb18ea
children 6da32a929222
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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License (the "License").
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6 * You may not use this file except in compliance with the License.
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7 *
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8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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9 * or http://www.opensolaris.org/os/licensing.
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10 * See the License for the specific language governing permissions
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11 * and limitations under the License.
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12 *
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13 * When distributing Covered Code, include this CDDL HEADER in each
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14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15 * If applicable, add the following below this CDDL HEADER, with the
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16 * fields enclosed by brackets "[]" replaced with your own identifying
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17 * information: Portions Copyright [yyyy] [name of copyright owner]
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18 *
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19 * CDDL HEADER END
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20 */
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21 /*
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22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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23 * Copyright (c) 2012 by Delphix. All rights reserved.
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24 */
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25
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26 /* Portions Copyright 2010 Robert Milkowski */
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27
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28 #ifndef _SYS_DMU_OBJSET_H
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29 #define _SYS_DMU_OBJSET_H
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30
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31 #include <sys/spa.h>
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32 #include <sys/arc.h>
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33 #include <sys/txg.h>
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34 #include <sys/zfs_context.h>
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35 #include <sys/dnode.h>
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36 #include <sys/zio.h>
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37 #include <sys/zil.h>
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38 #include <sys/sa.h>
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39
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40 #ifdef __cplusplus
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41 extern "C" {
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42 #endif
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43
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44 extern krwlock_t os_lock;
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45
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46 struct dsl_dataset;
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47 struct dmu_tx;
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48
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49 #define OBJSET_PHYS_SIZE 2048
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50 #define OBJSET_OLD_PHYS_SIZE 1024
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51
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52 #define OBJSET_BUF_HAS_USERUSED(buf) \
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53 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE)
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54
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55 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0)
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56
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57 typedef struct objset_phys {
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58 dnode_phys_t os_meta_dnode;
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59 zil_header_t os_zil_header;
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60 uint64_t os_type;
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61 uint64_t os_flags;
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62 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 -
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63 sizeof (zil_header_t) - sizeof (uint64_t)*2];
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64 dnode_phys_t os_userused_dnode;
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65 dnode_phys_t os_groupused_dnode;
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66 } objset_phys_t;
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67
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68 struct objset {
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69 /* Immutable: */
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70 struct dsl_dataset *os_dsl_dataset;
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71 spa_t *os_spa;
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72 arc_buf_t *os_phys_buf;
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73 objset_phys_t *os_phys;
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74 /*
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75 * The following "special" dnodes have no parent and are exempt from
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76 * dnode_move(), but they root their descendents in this objset using
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77 * handles anyway, so that all access to dnodes from dbufs consistently
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78 * uses handles.
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79 */
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80 dnode_handle_t os_meta_dnode;
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81 dnode_handle_t os_userused_dnode;
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82 dnode_handle_t os_groupused_dnode;
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83 zilog_t *os_zil;
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84
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85 /* can change, under dsl_dir's locks: */
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86 uint8_t os_checksum;
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87 uint8_t os_compress;
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88 uint8_t os_copies;
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89 uint8_t os_dedup_checksum;
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90 uint8_t os_dedup_verify;
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91 uint8_t os_logbias;
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92 uint8_t os_primary_cache;
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93 uint8_t os_secondary_cache;
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94 uint8_t os_sync;
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95
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96 /* no lock needed: */
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97 struct dmu_tx *os_synctx; /* XXX sketchy */
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98 blkptr_t *os_rootbp;
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99 zil_header_t os_zil_header;
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100 list_t os_synced_dnodes;
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101 uint64_t os_flags;
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102
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103 /* Protected by os_obj_lock */
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104 kmutex_t os_obj_lock;
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105 uint64_t os_obj_next;
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106
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107 /* Protected by os_lock */
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108 kmutex_t os_lock;
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109 list_t os_dirty_dnodes[TXG_SIZE];
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110 list_t os_free_dnodes[TXG_SIZE];
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111 list_t os_dnodes;
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112 list_t os_downgraded_dbufs;
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113
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114 /* stuff we store for the user */
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115 kmutex_t os_user_ptr_lock;
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116 void *os_user_ptr;
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117
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118 /* SA layout/attribute registration */
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119 sa_os_t *os_sa;
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120 };
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121
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122 #define DMU_META_OBJSET 0
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123 #define DMU_META_DNODE_OBJECT 0
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124 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0)
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125 #define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode)
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126 #define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode)
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127 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode)
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128
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129 #define DMU_OS_IS_L2CACHEABLE(os) \
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130 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \
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131 (os)->os_secondary_cache == ZFS_CACHE_METADATA)
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132
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133 /* called from zpl */
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134 int dmu_objset_hold(const char *name, void *tag, objset_t **osp);
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135 int dmu_objset_own(const char *name, dmu_objset_type_t type,
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136 boolean_t readonly, void *tag, objset_t **osp);
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137 void dmu_objset_rele(objset_t *os, void *tag);
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138 void dmu_objset_disown(objset_t *os, void *tag);
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139 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp);
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140
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141 void dmu_objset_stats(objset_t *os, nvlist_t *nv);
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142 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
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143 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
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144 uint64_t *usedobjsp, uint64_t *availobjsp);
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145 uint64_t dmu_objset_fsid_guid(objset_t *os);
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146 int dmu_objset_find_spa(spa_t *spa, const char *name,
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147 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags);
11209
462283cb4096 6905188 panic: kernel heap corruption when doing "zfs rename -r"
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents: 10922
diff changeset
148 int dmu_objset_prefetch(const char *name, void *arg);
4944
96d96f8de974 6569719 panic dangling dbufs (dn=ffffffff28814d30, dbuf=ffffffff20756008)
maybee
parents: 4787
diff changeset
149 int dmu_objset_evict_dbufs(objset_t *os);
10373
bcf97ee54990 6395956 snapshot dir needs real c/mtime
Chris Kirby <chris.kirby@sun.com>
parents: 10310
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150 timestruc_t dmu_objset_snap_cmtime(objset_t *os);
789
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151
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152 /* called from dsl */
10298
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Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents: 10272
diff changeset
153 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx);
10922
e2081f502306 PSARC 2009/571 ZFS Deduplication Properties
Jeff Bonwick <Jeff.Bonwick@Sun.COM>
parents: 10373
diff changeset
154 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg);
12722
0cc41f673f9d 6937998 txg_wait_synced() is called when unmounting zfs snapshots
Sanjeev Bagewadi <Sanjeev.Bagewadi@Sun.COM>
parents: 12684
diff changeset
155 boolean_t dmu_objset_is_dirty_anywhere(objset_t *os);
10298
a0d52501437c 6860996 %temporary clones are not automatically destroyed on error
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents: 10272
diff changeset
156 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds,
3547
e396e0a440b1 6512391 DMU should leverage ZIO dependencies to achieve greater parallelism
maybee
parents: 2885
diff changeset
157 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx);
1544
938876158511 PSARC 2006/077 zpool clear
eschrock
parents: 789
diff changeset
158 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp,
10298
a0d52501437c 6860996 %temporary clones are not automatically destroyed on error
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents: 10272
diff changeset
159 objset_t **osp);
a0d52501437c 6860996 %temporary clones are not automatically destroyed on error
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents: 10272
diff changeset
160 void dmu_objset_evict(objset_t *os);
11935
538c866aaac6 6716117 ZFS needs native system attribute infrastructure
Mark Shellenbaum <Mark.Shellenbaum@Sun.COM>
parents: 11209
diff changeset
161 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx);
12178
93ec1371f750 6939983 assertion failed: zap_count(os, DMU_USERUSED_OBJECT, &count) != 0||count == 0, in dsl_dataset.c
Mark Shellenbaum <Mark.Shellenbaum@Sun.COM>
parents: 11935
diff changeset
162 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx);
10298
a0d52501437c 6860996 %temporary clones are not automatically destroyed on error
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents: 10272
diff changeset
163 boolean_t dmu_objset_userused_enabled(objset_t *os);
9396
f41cf682d0d3 PSARC/2009/204 ZFS user/group quotas & space accounting
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents: 9355
diff changeset
164 int dmu_objset_userspace_upgrade(objset_t *os);
f41cf682d0d3 PSARC/2009/204 ZFS user/group quotas & space accounting
Matthew Ahrens <Matthew.Ahrens@Sun.COM>
parents: 9355
diff changeset
165 boolean_t dmu_objset_userspace_present(objset_t *os);
789
b348f31ed315 PSARC 2002/240 ZFS
ahrens
parents:
diff changeset
166
12684
397e44ebb8a9 6710343 dnode cache should register a dnode_move() callback to limit fragmentation
Tom Erickson <Tom.Erickson@Sun.COM>
parents: 12296
diff changeset
167 void dmu_objset_init(void);
397e44ebb8a9 6710343 dnode cache should register a dnode_move() callback to limit fragmentation
Tom Erickson <Tom.Erickson@Sun.COM>
parents: 12296
diff changeset
168 void dmu_objset_fini(void);
397e44ebb8a9 6710343 dnode cache should register a dnode_move() callback to limit fragmentation
Tom Erickson <Tom.Erickson@Sun.COM>
parents: 12296
diff changeset
169
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diff changeset
170 #ifdef __cplusplus
b348f31ed315 PSARC 2002/240 ZFS
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171 }
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172 #endif
b348f31ed315 PSARC 2002/240 ZFS
ahrens
parents:
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173
b348f31ed315 PSARC 2002/240 ZFS
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parents:
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174 #endif /* _SYS_DMU_OBJSET_H */